Patent Publication Number: US-8126372-B2

Title: Developer storage case and image forming apparatus

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is based on and claims priority under 35 U.S.C. 119 from Japanese Patent Application No. 2007-129348 filed May 15, 2007. 
     BACKGROUND 
     1. Technical Field 
     The present invention relates to a developer storage case and an image forming apparatus. 
     2. Related Art 
     Conventionally, in an image forming apparatus such as an electrographic type of copying machine or printer, a latent image formed on the surface of a sensitive member is developed by a developing device and the developed visible image is transferred and fixed to a medium to thereby form an image. In such image forming apparatus, in order to supply the developer consumed in the image forming operation, there is widely employed a replaceable developer storage case, namely, a so called toner cartridge. 
     Also, recently, society has been demanding the recycling or reuse of resources and thus the used toner cartridge has also been collected, decomposed, cleaned and filled with new toner for reuse or recycling. 
     SUMMARY 
     According to an aspect of the present invention, a developer storage case including: a storage case that includes: a developer storage space that stores a developer therein; and a discharge opening that discharges the developer stored in the developer storage space, the storage case defining an opening through which a developer passes into the developer storage space; a delivery member including: a rotation shaft that has one end supported on the storage case; and a main body that is supported on the rotation shaft, and that is disposed in contact with the wall surface of the developer storage space while being flexed, the delivery member delivering the developer stored in the developer storage space to the discharge opening; and an opening closing member that is removably supported on the storage case, and that closes the opening and supporting the other end of the rotation shaft. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Exemplary embodiment of the present invention will be described in detail based on the following figures, wherein: 
         FIG. 1  is an explanatory perspective view of an image forming apparatus according to an exemplary embodiment 1 of the invention; 
         FIG. 2  is an explanatory view of the whole of the image forming apparatus according to the exemplary embodiment 1 of the invention; 
         FIG. 3  is an explanatory perspective view of the image forming apparatus according to the exemplary embodiment 1 of the invention, showing a state in which a side cover is opened; 
         FIG. 4  is an explanatory view of a portion of the image forming apparatus, showing a state in which a toner cartridge as an exemplary example of a developer storage case is mounted and removed; 
         FIGS. 5A and 5B  are explanatory views of a developer delivery device according to the exemplary embodiment 1, showing a state in which the toner cartridge is mounted, specifically,  FIG. 5A  is an explanatory view when viewed from obliquely behind and  FIG. 5B  is a view when viewed from the direction of the arrow mark VB shown in  FIG. 5A ; 
         FIGS. 6A and 6B  are explanatory views of the developer delivery device, showing a state in which the toner cartridge and some other members are removed from the state shown in  FIG. 5 , specifically,  FIG. 6A  is an explanatory view when viewed from obliquely behind and  FIG. 6B  is a view when viewed from the direction of the arrow mark VIB shown in  FIG. 6A ; 
         FIG. 7  is a side view of the developer delivery device according to the exemplary embodiment 1; 
         FIG. 8  is an explanatory view of the developer delivery device according to the exemplary embodiment 1 when viewed from obliquely below; 
         FIG. 9  is an explanatory section view of the main portions of a flow-out opening portion of the developer delivery device in a state where the toner cartridge is inserted and a shutter is not opened; 
         FIG. 10  is an explanatory view of the relationship between the developer delivery device and developing device according to the exemplary embodiment 1 of the invention; 
         FIG. 11  is an explanatory enlarged view of the main portions of the flow-in opening portion of the developer delivery device according to the exemplary embodiment 1 of the invention; 
         FIG. 12  is an explanatory view of a developer delivery member according to the exemplary embodiment 1 of the invention; 
         FIGS. 13A to 13D  are an explanatory views of a developer storage case according to the exemplary embodiment 1 of the invention, specifically,  FIG. 13A  is a perspective view when viewed from right front obliquely above,  FIG. 13B  is a perspective view when viewed from left front obliquely below,  FIG. 13C  is a perspective view when viewed from left rear obliquely above, and  FIG. 13D  is a perspective view when viewed from right rear obliquely above; 
         FIGS. 14A to 14F  are explanatory views of the developer storage case according to the exemplary embodiment 1, specifically,  FIG. 14A  is a plan view,  FIG. 14B  is a view when viewed from the direction of the arrow mark XIVB shown in  FIG. 14A ,  FIG. 14C  is a section view taken along the XIVC-XIVC line shown in  FIG. 14A ,  FIG. 14D  is a section view taken along the XIVD-XIVD line shown in  FIG. 14A ,  FIG. 14E  is a section view taken along the XIVE-XIVE shown in  FIG. 14A , and  FIG. 14F  is a section view taken along the XIVF-XIVF shown in  FIG. 14B ; 
         FIG. 15  is an exploded view of a developer supply case according to the exemplary embodiment 1; 
         FIGS. 16A to 16F  are six views of a supply developer storage case as an example of a storage case according to the exemplary embodiment 1, specifically,  FIG. 16A  is a plan view,  FIG. 16B  is a view taken from the direction of the arrow mark XVIB shown in  FIG. 16A ,  FIG. 16C  is a view taken from the direction of the arrow mark XVIC shown in  FIG. 16A ,  FIG. 16D  is a view taken from the direction of the arrow mark XVID shown in  FIG. 16A ,  FIG. 16E  is a view taken from the direction of the arrow mark XVIE shown in  FIG. 16A , and  FIG. 16F  is a view taken from the direction of the arrow mark XVIF shown in  FIG. 16E ; 
         FIGS. 17A to 17D  are perspective views of a waste developer storage case according to the exemplary embodiment 1, specifically,  FIG. 17A  is a perspective view when viewed from right front obliquely above,  FIG. 17B  is a perspective view when viewed from left front obliquely below,  FIG. 17C  is a perspective view when viewed from left rear obliquely below, and  FIG. 17D  is a perspective view when viewed from right rear obliquely above; 
         FIGS. 18A to 18F  are six views of a waste developer storage case as an example of a storage case according to the exemplary embodiment 1, specifically,  FIG. 18A  is a plan view,  FIG. 18B  is a view taken from the direction of the arrow mark XVIIIB shown in  FIG. 18A ,  FIG. 18C  is a view taken from the direction of the arrow mark XVIIIC shown in  FIG. 18A ,  FIG. 18D  is a view taken from the direction of the arrow mark XVIIID shown in  FIG. 18A ,  FIG. 18E  is a view taken from the direction of the arrow mark XVIIIE shown in  FIG. 18A , and  FIG. 18F  is a view taken from the direction of the arrow mark XVIIIF shown in  FIG. 18E ; 
         FIGS. 19A and 19B  are perspective views of a partition member according to the exemplary embodiment 1, specifically,  FIG. 19A  is a perspective view when viewed from right front obliquely above, and  FIG. 19B  is a perspective view when viewed from right rear obliquely below; 
         FIG. 20A to 20C  are perspective views of a waste flow-in opening shutter according to the exemplary embodiment 1,  FIG. 20A  is a perspective view when viewed from right front obliquely below,  FIG. 20B  is a perspective view when viewed from right rear obliquely above, and  FIG. 20C  is a perspective view when viewed from left rear obliquely above; 
         FIGS. 21A to 21J  are explanatory views of a handle according to the exemplary embodiment 1, specifically,  FIG. 21A  is a perspective view when viewed from right front obliquely above,  FIG. 21B  is a perspective view when viewed from left front obliquely below,  FIG. 21C  is a perspective view when viewed from left rear obliquely above,  FIG. 21D  is a perspective view when viewed from right rear obliquely above,  FIG. 21E  is a perspective view when viewed from front,  FIG. 21F  is a perspective view when viewed from the direction of the arrow mark XXIF shown in  FIG. 21E ,  FIG. 21G  is a perspective view when viewed from the direction of the arrow mark XXIG shown in  FIG. 21E ,  FIG. 21H  is a perspective view when viewed from the direction of the arrow mark XXIH shown in  FIG. 21E ,  FIG. 21I  is a perspective view when viewed from the direction of the arrow mark XXII shown in  FIG. 21E , and  FIG. 21J  is a perspective view when viewed from the direction of the arrow mark XXIJ shown in  FIG. 21I ; 
         FIGS. 22A to 22H  are explanatory views of a cartridge shutter according to the exemplary embodiment 1, specifically,  FIG. 22A  is a perspective view when viewed from obliquely above,  FIG. 22B  is a perspective view when viewed from obliquely below,  FIG. 22C  is a plan view,  FIG. 22D  is a view when viewed from the direction of the arrow mark XXIID shown in  FIG. 22C ,  FIG. 22E  is a view when viewed from the direction of the arrow mark XXIIE shown in  FIG. 22C ,  FIG. 22F  is a view when viewed from the direction of the arrow mark XXIIF shown in  FIG. 22C ,  FIG. 22G  is a view when viewed from the direction of the arrow mark XXIIG shown in  FIG. 22C , and  FIG. 22H  is a view when viewed from the direction of the arrow mark XXIIH shown in  FIG. 22G ; 
         FIGS. 23A and 23B  are explanatory views of the rotation shaft of an agitator as an example of a developer delivery member according to the exemplary embodiment 1, specifically,  FIG. 23A  is a perspective view and  FIG. 23B  is a side view when viewed from the direction of the arrow mark XXIIIB shown in  FIG. 23A ; 
         FIG. 24  is an explanatory view of a film member as an example of a delivery member main body of an agitator according to the exemplary embodiment 1; 
         FIGS. 25A to 25E  are six views of a cartridge gear as an example of a delivery member drive transmission member according to the exemplary embodiment 1, specifically,  FIG. 25A  is a side view,  FIG. 25B  is a view when viewed from the direction of the arrow mark XXVB shown in  FIG. 25A ,  FIG. 25C  is a view when viewed from the direction of the arrow mark XXVC shown in  FIG. 25A ,  FIG. 25D  is a view when viewed from the direction of the arrow mark XXVD shown in  FIG. 25A ,  FIG. 25E  is a view when viewed from the direction of the arrow mark XXVE shown in  FIG. 25A , and  FIG. 25F  is a view when viewed from the direction of the arrow mark XXVF shown in  FIG. 25E ; and 
         FIGS. 26A to 26D  are explanatory views to show how to mount a toner cartridge according to the exemplary embodiment 1, specifically,  FIG. 26A  is an explanatory view to show the middle state of a step of mounting the toner cartridge into its associated cartridge storage case or removing the former from the latter,  FIG. 26B  is an explanatory view to show a state where the toner cartridge has been inserted into the deep portion of the cartridge storage case,  FIG. 26C  is an explanatory view to show a state where the cartridge storage case has been rotated inside and stored into the cartridge mounting portion, and  FIG. 26D  is an explanatory view to show a state where the toner cartridge has been moved forward from the state shown in  FIG. 26C  to its mounting position. 
     
    
    
     DETAILED DESCRIPTION 
     Now, description will be given below of a specific example of the mode for carrying out the invention (which is hereinafter referred to as an embodiment) with reference to the accompanying drawings. However, the invention is not limited to the following embodiment. 
     By the way, for easy understanding of the following description, in the drawings, a front and rear direction is expressed as an X axis direction, a left direction is expressed as a Y axis direction, and a vertical direction is expressed as a Z axis direction. Directions or sides, which are expressed by arrow marks X, −X, Y, −Y, Z, −Z respectively, are respectively used as a front direction, a rear direction, a right direction, a left direction, an upper direction, and a lower direction; or a front side, a rear side, a right side, a left side, an upper side and lower side. 
     Also, in the drawings, an expression, in which [•] is marked in [O], means an arrow mark which goes from the back of the figure sheet toward the front thereof; and, an expression, in which [x] is marked in [O], means an arrow mark going from the front of the figure sheet toward the back thereof. 
     Further, in the following description using the drawings, for easy understanding of the description, there are properly omitted other members than the members that are necessary for description. 
     Embodiment 1 
       FIG. 1  is an explanatory perspective view of an image forming apparatus according to an embodiment 1 of the invention. 
       FIG. 2  is an explanatory view of the whole of the image forming apparatus according to the embodiment 1 of the invention. 
       FIG. 3  is an explanatory perspective view of the image forming apparatus according to the embodiment 1 of the invention, showing a state in which a side cover is opened. 
     In  FIGS. 1 to 3 , a printer U, which is an example of the image forming apparatus according to the embodiment 1 of the invention, is structured such that a sheet feed case TR 1  for storing therein a recording medium S used as an example of a medium for recording an image thereon is stored in the lower portion of the printer U; and, on the upper surface of the printer U, there is formed a sheet discharge portion TRh. Also, in the upper portion of the printer U, there is formed an operation portion UI which is used to carry out various operations such as a button input. 
     The Printer U according to the embodiment 1 includes an image forming apparatus main body U 1 , a front cover U 2  as an example of an openable and closable opening/closing portion disposed on the front side of the image forming apparatus main body U 1 , and a side cover U 3  as an example of an openable and closable opening/closing portion disposed on the side surface of the image forming apparatus main body U 1 . The front cover U 2  is opened when opening the inside of the image forming apparatus main body U 1  in order to replace, clean or maintain an image holder cartridge, a developing device and a wrong member or to remove a recording medium S clogged with sheets. And, the side cover U 3  is opened when replacing a developer supply container, that is, a so called toner cartridge. 
     In  FIG. 3 , when the side cover U 3  of the printer U is moved to its opening position, the side of the printer U is opened, so that toner cartridges TCy, TCm, TCc and TCk as an example of the developer storage container can be handled. 
     In  FIG. 2 , the printer U includes a control portion C for carrying out various controls of the printer U, an image processing portion IPS, an image write device drive circuit DL, a power supply device E and the like, the operations of which can be controlled by the control portion C. The power supply device E is used to apply a voltage to charging rollers CRy, CRm, CRc and CRk functioning as examples of a charging device (which will be discussed later), a developing roller as an example of a developer holder, transfer rollers T 1   y , T 1   m , T 1   c  and T 1   k  as examples of a transfer device, and the like. 
     The image processing portion IPS converts print information input from an external image information transmitter or the like to image information for forming latent images corresponding to images of four colors K (black), Y (yellow), M (magenta) and C (cyan), and outputs the latent image forming image information to the image write device drive circuit DL at a given timing. The image write device drive circuit DL, according to the input image information on the respective colors, outputs a drive signal to a latent image write device ROS. The latent image write device ROS, according to the drive signal, emits laser beams Ly, Lm, Lc and Lk as examples of image write lights for writing the respective color images. 
     In  FIG. 2 , in front of (in the +X direction) the latent image write device ROS, there are disposed visible image forming devices UY, UM, UC and UK which are used to form toner images as examples of the visible images of the respective colors Y (yellow), M (magenta), C (cyan) and K (black). 
     The K (black) visible image forming device UK includes a sensitive member Pk as an example of the image holder. In the periphery of the sensitive member Pk, there are arranged a charging roller CRk as an example of the charger, a developing device Gk for developing the electrostatic latent image on the surface of the sensitive member as a visible image, a sensitive member cleaner CLk as an example of an image holder cleaning device for removing a developer remaining on the surface of the sensitive member Pk, and the like. 
     After, in the charging area of the sensitive member Pk that is disposed opposed to the charging roller CRk, the surface of the sensitive member Pk is uniformly charged by the charging roller CRk, a latent image is written into the latent image forming area of the sensitive member Pk by the laser Lk. The thus written electrostatic image is converted to a visible image in the developing area that is disposed opposed to the developing device Gk. 
     The black visible image forming device UK according to the embodiment 1 includes a replaceable image holder cartridge, in which the sensitive member Pk and sensitive member cleaner CLk are formed as an integral body, and a replaceable developing cartridge composed of the developing device Gk. 
     The other remaining colors visible image forming devices UY, UM and UC as well, similarly to the black visible image forming device UK, respectively include an image holder cartridge and a developing cartridge both of which can be mounted onto and removed from the image forming apparatus main body U 1 . According to the embodiment 1, the four visible image forming devices UY, UM, UC and UK are respectively supported on a removably mountable frame body Ut, that is, a so called replacement frame Ut; and the four visible image forming devices UY, UM, UC and UK are structured such that they are integral with the image forming apparatus main body U 1  and also they can be replaced respectively. 
     In  FIG. 2 , in front (in the +X direction) of the sensitive members Py to Pk, there is disposed a belt module BM as an example of a recording medium delivery device supported on the opening/closing portion U 2 . The belt module BM includes a medium delivery belt as an example of a recording medium hold and delivery member, a belt drive roller Rd as an example of a drive member for supporting the medium delivery belt B, a belt support roller (Rd+Rj) as an example of a hold and delivery member support system containing a driven roller Rj as an example of a driven member, transfer rollers T 1   y , T 1   m , T 1   c  and T 1   k  respectively as transfer devices disposed opposed to their associated sensitive members Py to Pk, a belt cleaner CLb as an example of a hold and delivery member cleaning device, and a medium attracting roller Rk as an example of a recording medium attracting member which is disposed opposed to the driven roller Rj and attracts the recording medium S to the medium delivery belt B. However, the medium attracting roller Rk is not always necessary but it can be omitted. The medium delivery belt B is rotatably supported by the belt support roller (Rd+Rj). 
     By the way, the image density sensor SN 1  is used to detect the density of a density detecting image, namely, a so called patch image formed by image density adjust means (not shown) provided in the control portion C. The image density adjust means, according to the image density detected by the image density detect member, adjusts a voltage to be applied to the transfer rollers T 1   y , T 1   m , T 1   c  and T 1   k  and the intensity of the latent image write lights Ly, Lm, Lc and Lk to thereby adjust or correct the image density, that is, carry out a so called process control. 
     A recording medium S stored in the sheet feed case TR 1  disposed downwardly of the medium delivery belt B is taken out by a sheet feed member Rp and is then delivered to a recording medium delivery passage SH. 
     The recording medium S in the recording medium delivery passage SH is delivered by a medium delivery roller Ra as an example of the recording medium delivery member and is sent to a resist roller Rr as an example of a sheet feed timing adjust member. The resist roller Rr delivers the recording medium S at a given timing to a recording medium attracting position Q 6  which is set opposed to a driven roller Rj and medium attracting roller Rk. The recording medium S, which has been delivered to the recording medium attracting position Q 6 , is then attracted electrostatically to the medium delivery belt B. 
     The recording medium S, which has been attracted to the medium delivery belt B, is allowed to move sequentially through the transfer areas Q 3   y , Q 3   m , Q 3   c  and Q 3   k  which are in contact with the sensitive members Py, Pm, Pc and Pk respectively. 
     To the transfer rollers T 1   y , T 1   m , T 1   c  and T 1   k  which are disposed on the back surface side of the medium delivery belt B in the transfer areas Q 3   y , Q 3   m , Q 3   c  and Q 3   k , at a given timing, there is applied a transfer voltage having a reversed polarity with respect to the charged polarity of the toner from the power supply circuit E which is controlled by the control portion C. 
     For a multiple color image, the toner images on the respective sensitive members Py, Pm, Pc and Pk are superimposingly transferred to the recording medium S on the medium delivery belt B by their associated transfer rollers T 1   y , T 1   m , T 1   c  and T 1   k . Also, for a single color image, that is, for a monochrome image, only the K (black) toner image is formed on the sensitive member Pk and only this K (black) toner image is transferred to the recording medium S by the transfer device T 1   k.    
     After the toner images are transferred, the toner remaining on the surfaces of the sensitive members Py, Pm, Pc and Pk is collected and cleaned by their associated sensitive member cleaners Cly to Clk, and the sensitive members Py, Pm, Pc and Pk are charged again by their associated charging rollers CRy to CRk. 
     The recording medium S with the toner images transferred thereto is fixed in a fixing area Q 5  which can be defined by pressure contact between a heating roller Fh as an example of a heating and fixing member provided in a fixing device F functioning as an example of a fixing device and a pressure roller Fp as an example of a pressure fixing member. The recording medium S with the images fixed thereon is then discharged from a discharge roller Rh, which is used as an example of a medium discharge roller, to a medium discharge portion TRh. 
     The medium delivery belt B, after the recording medium S is removed therefrom, is cleaned by the belt cleaner Clb. 
     (Description of Developer Delivery Device) 
       FIG. 4  is an explanatory view of a state in which a toner cartridge as an example of the developer storage case is mounted onto and removed from the image forming apparatus main body. 
       FIG. 5  is an explanatory view of a developer delivery device according to the embodiment 1 of the invention in a state where the toner cartridge is mounted on the image forming apparatus main body. Specifically,  FIG. 5A  is an explanatory view of the developer delivery device, showing a state where the developer delivery device is viewed from obliquely backward thereof, and  FIG. 5B  is a view of the developer delivery device when it is viewed from the direction of the arrow mark VB shown in  FIG. 5A . 
       FIG. 6  is an explanatory view of the developer delivery device, showing a state where the toner cartridge is removed from the state shown in  FIG. 5  and some of the members thereof are also removed. Specifically,  FIG. 6A  is an explanatory view of the developer delivery device, showing a state where it is viewed from obliquely backward; and,  FIG. 6B  is a view of the developer delivery device when it is viewed from the direction of the arrow mark VIB shown in  FIG. 6A . 
       FIG. 7  is a side view of the developer delivery device according to the embodiment 1. 
       FIG. 8  is an explanatory view of the developer delivery device according to the embodiment 1 when it is viewed from obliquely backward thereof. 
       FIG. 9  is an explanatory view of the main portions of the flow-out opening portion of the developer delivery device, showing a state where a toner cartridge is inserted and a shutter is not opened. 
     By the way, in the following description, members respectively provided for the respective colors Y, M, C and K are similar in structure to each other and thus, in principle, they will be described while their respective suffixes are omitted. 
     In  FIGS. 4 to 8 , to the right interior portion of the image forming apparatus main body U 1 , there is fixed and supported a developer delivery device  1 . The developer delivery device  1  includes a frame body  2 . The frame body  2  includes a plate-shaped frame body main body  2   a  extending in the vertical direction, a top wall portion  2   b  provided on and projected from the upper end of the frame body main body  2   a  in the right direction, and a bottom wall portion  2   c . Between the top wall portion  2   b  and bottom wall portion  2   c , there are formed three partition wall portions  2   d  which are respectively arranged parallel to the top wall portion  2   b  and bottom wall portion  2   c . In the front and rear ends of the frame body main body  2   a , there are formed a front end wall portion  2   e  and a rear end wall portion  2   f  respectively. 
     In  FIGS. 7 and 8 , in the lower surfaces of the front end wall portion  2   b  and partition wall portion  2   d , there are formed rotation regulate portions  2   g  which respectively project in the lower direction. In the portions of the frame body main body  2   a  that are situated downward of the rotation regulate portions  2   g , there are formed drive transmission member openings  2   h  respectively. Downwardly of the drive transmission member openings  2   h , there are formed angular-hole shaped cartridge shutter fix portions  2   i  as an example of a container side opening/closing member fix portion. 
     In  FIGS. 7 and 8 , on the front side of the respective drive transmission member openings  2   h , there are supported plate springs SP which respectively extend to the outside (to the right side). 
     In  FIGS. 4 and 6A , in the front wall portion  2   e , there are formed lock portions  2   j  as examples of a fixing portion and, downwardly of the respective lock portions  2   j , there are formed CRUM connector portions  2   k  as examples of a memory member connecting portion which project backward. In  FIG. 6A , in the portions of the frame body main body  2   a  that are respectively situated backwardly of the CRUM connector portions  2   k , as an example of a front side guide portion, there are formed plate-shaped front side guide portions  2   m.    
     By spaces which are respectively sandwiched by the top wall portion  2   a , partition wall portions  2   d  and bottom wall portion  2   c  of the frame body  2 , there are formed four cartridge mounting portion  3  on which toner cartridges TCy, TCm, TCc and TCk for Y, M, C and K can be mounted respectively in this order from bottom. 
     On the cartridge mounting portions  3 , respectively, there are supported cartridge storage cases  4  into which the toner cartridges TCy, TCm, TCc and TCk can be stored (in  FIG. 6A , there are shown only the C color and K color but Y color and M color are not shown) in such a manner that they can be rotated about their associated rotation center portions  4   a  formed in the rear ends thereof. In  FIG. 9 , in the bottom portions of the cartridge storage cases  4 , as an example of a guide portion, there are arranged guide ribs  4   b  which not only are provided on and projected from their associated storage case bottom portions upwardly but also extend in the back and forth direction. In  FIG. 4 , in the upper surfaces of the front end portions of the cartridge storage cases  4 , as an example of a mounting time positioning portion, there are formed positioning cut-away portions  4   c  which respectively have an isosceles triangle shape. In  FIGS. 4 to 6 , in the right end walls of the cartridge storage cases  4 , there are formed mounting sense operation portions  4   d  which not only are formed in a shape allowing them to extend into the inside of their associated walls but also can be elastically deformed. 
     In  FIG. 6 , in the rear end portions of the respective cartridge mounting portions  3  of the frame body  2 , there are formed flow-in opening forming portions  5  respectively having flow-in openings  6  into which developers from the toner cartridges TCy, TCm, TCc and TCk are allowed to flow (in  FIG. 6A , there is shown only the Y developer). In each flow-in opening forming portion  5 , there is formed a pair of upper and lower shutter guide portions  5   a  which extends in the back and forth direction as an example of a guide member. Also, in  FIGS. 6A and 7 , in the flow-in opening forming portion  5 , as an example of a closing member securing portion, there is formed a shutter lock portion  5   b  which slants outwardly (to the right) and can be elastically deformed (in  FIG. 6A , only the M color is shown). 
     On the shutter guide portion  5   a  of each flow-in opening forming portion  5 , there is supported, as an example of a flow-in opening closing member, a main body side shutter  7  in such a manner that it can be moved in the back and forth direction. The main body side shutter  7  is supported to be movable between an open position shown in the Y color main body side shutter  7  in  FIG. 6A  where the flow-in opening  6  is opened and a closed position shown in the M color main body side shutter  7  in  FIG. 7  and  FIG. 6A  where the flow-in opening  6  is closed. By the way, the front end face of the main body side shutter  7  is contacted with the shutter lock portion  5   b  which project outside and can be elastically deformed, whereby the main body side shutter  7  is prevented against movement, that is, it is locked at the closed position. 
       FIG. 10  is an explanatory view of the relationship between the developer delivery device and developing device according to the embodiment 1 of the invention. 
     In  FIG. 6B , in the inner surface of the frame body main body  2   a  of the frame body  2 , there is formed a main body side delivery passage forming recessed portion  8  which extends forward from the flow-in opening  6  and is recessed outward. In  FIGS. 4 to 8 , on the inner surfaces of the frame body  2 , there are mounted delivery passage forming members  9  (in  FIG. 6B , there are shown only the C and K colors) in such a manner that they respectively correspond to their associated main body side delivery passage forming recessed portions  8 . An internal cylindrical-shaped space, which is defined by each main body side delivery passage forming recessed portion  8  and its associated delivery passage forming member  9 , constitutes a developer delivery passage  11 . 
     In  FIG. 10 , the developer delivery passages  11  respectively extend from the positions of the flow-in openings  6  to the developing devices Gy, Gm, Gc and Gk. According to the embodiment 1, each developer delivery passage  11  is formed not in a linear shape but in a curved shape which has a flow-in side horizontal delivery portion  11   a  extending horizontally from its associated flow-in opening  6 , a slanting delivery portion  11   b  slanting obliquely upward from the flow-in side horizontal delivery portion  11   a , and a developing side horizontal delivery portion lid extending horizontally from the slanting delivery portion  11   b  to its associated developing device Gk (devices Gy, Gm, Gc and Gk). 
     In  FIGS. 5B ,  6 B and  10 , on the front end side of the delivery passage forming member  9 , there is formed a developing device connecting portion  9   a  which constitutes the developing side horizontal delivery portion lid; and, on the developing device connecting portion  9   a , there is mounted a flow-out opening shutter  12  as an example of a flow-out opening closing member. The flow-out opening shutter  12  is always energized to a front closing position by a spring  13  as an example of an energizing member to thereby close the flow-out opening  11   f  of the developer delivery passage  11  shown in  FIG. 6 . Therefore, when the front cover U 2  is opened and the replacement frame Ut is removed to thereby remove the developing devices Gy, Gm, Gc and Gk, the flow-out opening shutter  12  is moved to the closing position by the spring  13  to thereby be able to prevent the leakage of the developer. On the other hand, when the replacement frame Ut is mounted to thereby mount the developing devices Gy, Gm, Gc and Gk, the flow-out opening shutter  12  is pushed and moved by the portions to be connected  16  (see  FIG. 6 ) of the developing devices Gy, Gm, Gc and Gk, whereby the developing device connecting portions  9   a  are fitted with the portions to be connected  16 , which makes it possible to supply the developer from the flow-out openings  11  to the developing devices Gy, Gm, Gc and Gk. 
       FIG. 11  is an enlarged explanatory view of the main portions of the flow-in opening portion of the developer delivery device according to the embodiment 1 of the invention. 
       FIG. 12  is an explanatory view of the developer delivery member according to the embodiment 1 of the invention. 
     In  FIGS. 6B ,  11  and  12 , within the developer delivery passage  11 , there is rotatably supported a developer delivery member  17  along the curved developer delivery passage  11 . In  FIGS. 10 to 12 , the developer delivery member  17  includes a rotation shaft  17   a  and a spiral-shaped delivery blade  17   b  formed in the outer periphery of the rotation shaft  17   a . According to the embodiment 1, the developer delivery member  17  is made of flexible resin material and, when rotated, it delivers toner as an example of a developer while it is curved along the shape of the developer delivery passage  11 . In  FIG. 11 , in the position of the developer delivery member  17  that corresponds to the flow-in opening  6 , there is formed a large diameter portion  17   d  which is larger in diameter than the rotation shaft  17   a , while the large diameter portion  17   d  includes a clogging preventive member mounting portion  17   e.    
     In  FIGS. 5B and 6B , on the rear end portion of the frame body  2 , as an example of a supplying drive system, there is supported a supplying motor  19  for each color. In  FIG. 10 , on a drive shaft  19   a  which extends from the supplying motor  19 , there is supported a drive gear  20  as an example of a drive force transmission member; and, when the drive gear  20  transmits a drive force to a gear  17   g  which is supported on the rear end of the developer delivery member  17  and functions as an example of a drive receiving transmission member, the developer delivery member  17  is driven to thereby deliver the toner. In  FIGS. 6 to 8 , the drive gear  20  is meshingly engaged with a cartridge drive gear  20   a  which, as an example of a developer storage container drive transmission member, is disposed in the front side portion of the opening  2   h . The cartridge drive gear  20   a  is disposed in such a manner that a portion of the outer periphery thereof is exposed to the outside. 
     In  FIGS. 11 and 12 , on the clogging preventive member mounting portion  17   e  of the developer delivery member  17 , there is fixed and supported one end portion of a clogging preventive member  21 . According to the embodiment 1, the clogging preventive member  21  is formed in a flexible thin film shape, that is, in a so called film shape and can be made of resin such as PET (polyethylene terephtalate) or PPS (polyphenylene sulfide). The clogging preventive member  21  is structured such that it can rotate in contact with the inner peripheral surface of the developer delivery passage  11  while it is elastically deformed and flexed. And, in a state where the leading end of the clogging preventive member  21  is moved to a position corresponding to the flow-in opening  6 , the clogging preventive member  21  is allowed to extend due to its own restoring force and move into the flow-in opening  6  from the developer delivery passage  11 , thereby being able to prevent the clogging of the flow-in opening  6 . Also, the clogging preventive member  21  is structured such that, within the developer delivery passage  11 , it can be elastically deformed in such a manner to wind around the rotation shaft  17   a  and can be stored into between the delivery blades  17   b , whereby it is difficult to break. 
     The respective members, to which the reference numerals  2  to  21  are given, cooperate together in constituting the developer delivery device  1  according to the embodiment 1. 
     (Description of Developer Supply Case) 
       FIG. 13  is a perspective view of a developer storage case according to the embodiment 1 of the invention. Specifically,  FIG. 13A  is a perspective view of the developer storage case, when it is viewed from front right obliquely above;  FIG. 13B  is a perspective view of the developer storage case, when it is viewed from front left obliquely below;  FIG. 13C  is a perspective view of the developer storage case, when it is viewed from rear left obliquely above; and,  FIG. 13D  is a perspective view of the developer storage case, when it is viewed from rear right obliquely above. 
       FIG. 14  is an explanatory view of the developer storage case according to the embodiment 1 of the invention. Specifically,  FIG. 14A  is a plan view of the developer storage case;  FIG. 14B  is a view of the developer storage case, when it is viewed from the direction of the arrow mark XIVB shown in  FIG. 14A ;  FIG. 14C  is a section view taken along the XIVC-XIVC line shown in  FIG. 14A ;  FIG. 14D  is a section view taken along the XIVD-XIVD line shown in  FIG. 14A ;  FIG. 14E  is a section view taken along the XIVE-XIVE line shown in  FIG. 14A ; and,  FIG. 14F  is a section view taken along the XIVF-XIVF line shown in  FIG. 14B . 
       FIG. 15  is an exploded view of the developer supply case according to the embodiment 1 of the invention. 
     In  FIGS. 3 ,  4 ,  13 ,  14  and  15 , each of the toner cartridges TCy, TCm, TCc and TCk as an example of the developer storage case according to the embodiment 1 is formed in a flat and substantially cuboid shape the horizontal direction width of which is larger than the vertical direction height thereof. Each of the toner cartridges TCy, TCm, TCc and TCk includes a box-shaped supply developer storage case  31  having an opening formed in one end portion thereof for supplying a developer, and a box-shaped waste developer storage case  32  having an opening formed opposed to the opening of the supply developer storage case  31 . In  FIG. 14 , the supply developer storage case  31  and waste developer storage case  32  are divided by a partition member  33 . That is, in order to solve a technological problem that the supply developer storage case  31  and waste developer storage case  32  are not provided separately but they can be replaced as an integral body, the supply developer storage case  31  and waste developer storage case  32  are connected together. Also, in order to solve a technological problem to reduce the size of the toner cartridges TCy, TCm, TCc and TCk, the supply developer storage case  31  and waste developer storage case  32  are not closed respectively but are separated by the single partition member  33 , whereby the size of each toner cartridge can be reduced, the number of parts thereof can be decreased and the cost thereof can be reduced. Further, in order to solve a technological problem to be able to secure the maximum developer storage amount in a limited space within the image forming apparatus U, the whole of the toner cartridge is formed in a cuboid shape. 
     (Description of Supply Developer Storage Case) 
       FIG. 16  is six views of the supply developer storage case as an example of a storage case according to the embodiment 1. Specifically,  FIG. 16A  is a plan view of the supply developer storage case,  FIG. 16B  is a view of the supply developer storage case when it is viewed from the direction of the arrow mark XVIB shown in  FIG. 16A ,  FIG. 16C  is a view of the supply developer storage case when it is viewed from the direction of the arrow mark XVIC shown in  FIG. 16A ,  FIG. 16D  is a view of the supply developer storage case when it is viewed from the direction of the arrow mark XVID shown in  FIG. 16A ,  FIG. 16E  is a view of the supply developer storage case when it is viewed from the direction of the arrow mark XVIE shown in  FIG. 16A , and  FIG. 16F  is a view of the supply developer storage case when it is viewed from the direction of the arrow mark XVIF shown in  FIG. 16E . 
     In  FIGS. 13 to 16 , the supply developer storage case  31 , which is disposed on the rear side of each of the toner cartridges TCy, TCm, TCc and TCk, includes a top wall  31   a , a bottom wall  31   b , a right side wall  31   c , a left side wall  31   d  and a rear end wall  31   e  as an example of one end wall. A space, which is surrounded by the respective walls  31   a  to  31   e , constitutes a supply developer storage space  31   f ; and, in the front end portion of the supply developer storage case  31  where no wall is formed, there is formed an opening  31   g . The supply developer storage case  31  includes a connecting portion  31   h  formed in the front end portion thereof. In the right and left portions of the connecting portion  31   h , there are formed notch-shaped connecting recessed portions  31   h   1  and  31   h   2 , while the right side connecting recessed portion  31   h   1  and left connecting recessed portion  31   h   2  are formed different in shape from each other in order to prevent the wrong mounting of the waste developer storage case  32 . Also, in the inner surface of the connecting portion  31   h , as an example of an opening closing member support portion, there is formed a step-shaped partition member support portion  31   h   3 . 
     In the upper and lower surfaces of the connecting portion  31   h , there are formed four connecting holes  31   j.    
     The rear top wall  31   a  of the connecting portion  31   h  includes, on the outer surface thereof, a dual mounting time positioned portion  31   k  which is formed in an isosceles triangle shape having a vertex in the rear portion thereof and is projected upwardly. The mounting time positioned portion  31   k  is fitted into the positioning cut-away portion  4   c  and is thereby positioned in a state where the toner cartridges TCy, TCm, TCc and TCk are respectively stored in their associated cartridge storage cases  4 . That is, in order to solve a technological problem to facilitate the visual recognition of the insertion direction and positioning of the toner cartridge, there is employed the isosceles triangle shaped mounting time positioned portion  31   k  having a vertex set in the rear portion thereof which is the insertion direction thereof. 
     In the left portion of the rear end portion of the top wall  31   a , as an example of a mounting position regulate portion, there is formed a mounting position rotation regulated portion  31   m  into which the rotation regulate portion  2   g  can be fitted in the mounting time of the toner cartridge TCy, TCm, TCc and TCk. The mounting position rotation regulated portion  31   m  includes a slanting portion  31   m   1  extending right obliquely backward from the left end of the portion  31   m  and a rearward extending portion  31   m   2  extending rearward from the right end of the slanting portion  31   m   1 . 
     In  FIG. 16F , on the lower surface of the bottom wall  31   b , there are provided, as an example of a portion be guided, three ribs to be guided  31   n  which extend parallel to each other in the back and forth direction. In the rear end portion of the rib to be guided  31   n , there is formed a slanting guide portion  31   n   1 . When the toner cartridges TCy, TCm, TCc and TCk are stored into their associated cartridge storage cases  4 , they are guided by the guide ribs  4   b  and are mounted in a state where their relative positions to their associated cartridge storage cases  4  are guided to given positions. That is, the ribs to be guided  31   n  and guide ribs  4   b  are provided in order to solve a technological problem to enhance the linear accuracy of the insertion of the toner cartridges TCy, TCm, TCc and TCk into their associated cartridge storage cases  4 . 
     In  FIGS. 16A and 16C , on the right side wall  31   c , there is provided a mounting sense operation engaging portion  31   c   1  which is composed of a semi-spherical-shaped projection projecting outwardly. The mounting sense operation engaging portion  31   c   1  is structured such that, in the middle of the operation to store the toner cartridges TCy, TCm, TCc and TCk into their associated cartridge storage cases  4 , it is contacted with the mounting sense operation portion  4   d  and is thereby elastically deformed and, when it is pushed in further by the mounting sense operation portion  4   d , it can be restored due to its elastic force. Therefore, the mounting sense operation engaging portion  31   c   1  and mounting sense operation portion  4   d  are provided in order to solve a technological problem to apply a mounting sense, namely, a so called click sense to an operator, who mounts the toner cartridges TCy, TCm, TCc and TCk, to thereby allow the operator to recognize the mounting of the toner cartridges through senses, that is, to make it easier for a user to recognize that the toner cartridges TCy, TCm, TCc and TCk have been mounted. 
     In  FIG. 16A , on the upper side of the rear end portion of the left side wall  31   d , there is disposed a member pass portion  31   p  which is formed in correspondence to the back and forth direction width of the mounting position rotation regulated portion  31   m  and has an arc-shaped outer shape. The member pass portion  31   p  is provided so as to solve a technological problem that, when mounting the toner cartridge, the cartridge drive gear  20   a  can be prevented from colliding or interfering with the wall surface of the supply developer storage case  31 ; and, the member pass portion  31   p  is formed in a shape which is recessed with respect to the other outer shape portions of the left side wall  31   d.    
     On the lower side of the rear end portion of the left side wall  31   d , as an example of an opening/closing member pass portion, there is provided a shutter pass portion  31   q  having an arc-shaped outer shape so as not to interfere with the flow-in opening forming portion  5 . The outer shape of the shutter pass portion  31   q  is formed to be recessed with respect the front side portion of the left end wall  31   d . On the back and forth direction central portion of the shutter pass portion  31   q , as an example of an opening/closing member move portion, there is provided a shutter moving projection  31   r  which projects outwardly. Also, when the shutter lock portion  5   b  is pushed inwardly and is thus elastically deformed to thereby remove the locking of the main body side shutter  7  in the toner cartridge mounting operation, the shutter moving projection  31   r  also functions as a regulation remove member. And, the shutter moving projection  31   r  is contacted with the front end face of the main body side shutter  7 , whereby, when the toner cartridges TCy, TCm, TCc and TCk move backward from front, the shutter moving projection  31   r  presses against the main body side shutter  7  to thereby move it from its open position to its closed position. 
     In  FIG. 16B , the rear end portion of the shutter pass portion  31   q , there is formed a discharge opening forming portion  31   s  which projects to the right. In the discharge opening forming portion  31   s , there is formed a supply developer discharge opening  31   t  as an example of a discharge opening which communicates with a supply developer storage space  31   f  and is connected to the flow-in opening  6  of the developer delivery device  1 . 
     In  FIG. 16 , the discharge opening forming portion  31   s  includes, as an example of an opening/closing guide portion, a cartridge shutter guide portion  31   u  which extends in the back and forth direction of the discharge opening forming portion  31   s.    
     In  FIG. 16B , the discharge opening forming portion  31   s  includes, as an example of an opening/closing member smooth mounting portion, shutter mounting guide portions  31   s   1  which are formed in the rear end portion of the discharge opening forming portion  31   s  and have a slope shape that becomes smaller in thickness as it goes backward. Also, in the upper front portion of the discharge opening forming portion  31   s , there is formed a notch-shaped shutter removal preventive recessed portion  31   s   2  as an example of an opening/closing member removal preventive portion. In the discharge opening forming portion  31   s , as an example of a developer storage portion, there are formed three storage recessed portions  31   s   3  which are adjacent to the front side of the supply developer discharge opening  31   t . The storage recessed portions  31   s   3 , when mounting or removing the toner cartridges TCy, TCm, TCc and TCk, are interposed between the flow-in opening  6  and supply developer discharge opening  31   t , and are used to provisionally store therein the developer that is going to leak when the flow-in opening is opened or closed due to the movement of the main body side shutter  7  or when the supply developer discharge opening  31   t  is opened or closed, thereby preventing the developer from leaking into the image forming apparatus U or from contaminating the interior of the image forming apparatus U. 
     Also, in  FIG. 16B , in the periphery of the supply developer discharge opening  31   t , there is formed, as an example of a leakage preventive portion, an edge-shaped sealing rib  31   t   1  which projects outwardly. That is, the sealing rib  31   t   1  is provided in order to solve a technological problem to enhance the sealing performance of the supply developer discharge opening  31   t  with respect to a cartridge shutter ( 48 ) which will be discussed later. 
     In  FIGS. 15 and 16E , in the outer surface of the rear end wall  31   e , there is formed a shaft support hole  31   v  which is situated at a position shifted to the left side and penetrates through the rear end wall  31   e.    
     In  FIGS. 14 and 16D , in the inner surface of the rear end wall  31   e  of the supply developer storage case  31 , there is formed a seal member bonding portion  31   w  which is composed of a ring-shaped base portion. 
     In  FIGS. 14 to 16 , on the left portion of the rear end wall  31   e , there are provided, as an example of a case kind judge portion, kind judge projections  31   x  which project backwardly. The kind judge projection  31   x  includes an arc portion  31   x   1  formed so as to correspond to a gear ( 61 ) (which will be discussed later) and a judge portion  31   x   2  which extends to the left from a given position in the arc portion  31   x   1 . The forming position and number of the judge portion  31   x   2  differ according to the respective colors, Y, M, C and K; and, it is structured such that it corresponds to a recessed portion (not shown) formed in the rear end wall of the cartridge storage case. Only when the colors coincide with each other, the projection  31   x  and recessed portion can be fitted with each other, so that the toner cartridges TCy, TCm, TCc and TCk can be mounted onto their associated cartridge storage cases  4   y ,  4   m ,  4   c  and  4   k . But, when the colors are different from each other, the projection  31   x  is not fitted into the recessed portion but is caught on the rear end wall, so that the toner cartridges TCy, TCm, TCc and TCk cannot be mounted onto their associated cartridge storage cases  4   y ,  4   m ,  4   c  and  4   k , thereby being able to prevent a possibility that the toner cartridges TCy, TCm, TCc and TCk can be stored into the cartridges  4  of different colors in error. That is, the kind judge projection  31   x  is provided in order to solve a technological problem to prevent the wrong mounting of the toner cartridges TCy, TCm, TCc and TCk. By the way, the kind judge projections  31   x  for respective colors can be molded easily using bushings when the supply developer storage case  31  is integrally molded using a die assembly. 
     (Description of Waste Developer Storage Case) 
       FIG. 17  is a perspective view of a waste developer storage case according to the embodiment 1 of the invention. Specifically,  FIG. 17A  is a perspective view when it is viewed from right front obliquely above,  FIG. 17B  is a perspective view when it is viewed from left front obliquely below,  FIG. 17C  is a perspective view when it is viewed from left rear obliquely below, and  FIG. 17D  is a perspective view when it is viewed from right rear obliquely above. 
       FIG. 18  is six views of the waste developer storage case according to the embodiment 1 of the invention. Specifically,  FIG. 18A  is a plan view,  FIG. 18B  is a view when it is viewed from the direction of the arrow mark XVIIIB shown in  FIG. 18A ,  FIG. 18C  is a view when it is viewed from the direction of the arrow mark XVIIIC shown in  FIG. 18A ,  FIG. 18D  is a view when it is viewed from the direction of the arrow mark XVIIID shown in  FIG. 18A ,  FIG. 18E  is a view when it is viewed from the direction of the arrow mark XVIIIE shown in  FIG. 18A , and  FIG. 18F  is a view when it is viewed from the direction of the arrow mark XVIIIF shown in  FIG. 18E . 
     In  FIGS. 13 to 15 ,  17  and  18 , the waste developer storage case  32 , which is disposed on the front side of the toner cartridges TCy, TCm, TCc and TCk, includes a waste side case main body  32   b  which is formed in a cuboid shape having a rearward opened opening  32   a . In the interior of the waste side case main body  32   b , there is formed a waste developer storage space  32   c  into which, in the image forming operation, there are stored sensitive member cleaners CLy, CLm, CLc and CLk and waste developers collected by a belt cleaner CLb. 
     In  FIGS. 17 and 18 , in the rear end portion of the waste side case main body  32   b , there is formed a portion to be connected  32   d  which can be fitted with and connected to the inside of the connecting portion  31   h  of the supply developer storage case  31 . 
     On the portion to be connected  32   d , there is provided a pawl portion  32   e  which can be fitted with and connected to the connecting hole  31   j  of the connecting portion  31   h . That is, the connecting hole  31   j  and pawl portion  32   e  are provided in order to solve a technological problem that, in a state where the waste developer storage case  32  and supply developer storage case  31  are mounted, they are difficult to remove but can be decomposed. 
     Also, the portion to be connected  32   d  includes a right side connecting projecting portion  32   f   1  and a left side connecting projecting portion  32   f   2  which are respectively formed so as to correspond to a right side connecting recessed portion  31   h   1  and a left side connecting recessed portion  31   h   2 . Therefore, in order to prevent the wrong mounting of the waste developer storage case  32 , in correspondence to the fact that the right side connecting recessed portion  31   h   1  and left side connecting recessed portion  31   h   2  are different in shape from each other, the right side connecting projecting portion  32   f   1  and left side connecting projecting portion  32   f   2  are different in shape from each other. That is, in order to solve a technological problem to prevent the wrong assembling of the supply developer storage case  31  and waste developer storage case  32 , there are provided the right side connecting recessed portion  31   h   1  and left side connecting recessed portion  31   h   2  different in shape from each other as well as the right side connecting projecting portion  32   f   1  and left side connecting projecting portion  32   f   2  which are different in shape from each other in correspondence to the former two portions. 
     By the way, the height of the right side connecting projecting portion  32   f   1  and left side connecting projecting portion  32   f   2  is set such that they are almost flush with the outer surface of the connecting portion  31   h  of the supply developer storage case  31 . Therefore, in a state where the connecting portion  32   f  is connected to the connecting portion  31   h , a fixing tape Tp (see  FIG. 13 ) can be bonded over both the connecting portion  31   h  of the supply developer storage case  31  and the connecting projecting portions  32   f   1 ,  32   f   2  of the waste developer storage case  32 . That is, the connecting projecting portions  32   f   1  and  32   f   2  are provided in order to solve a technological problem to prevent a possibility that the fixing tape Tp can be bonded only to the outer periphery of the supply developer storage case  31  and thus the fixation by the tape Tp can be insufficient. 
     In  FIGS. 15 ,  17  and  18 , in the front side right portion of the waste side case main body  32   b , as an example of an operation member fixing portion, there is integrally formed a handle fix portion  32   g  which includes a projection-shaped rotation center portion  32   g   1 . In  FIGS. 17D and 18 , in the rear surface of the handle fix portion  32   g , there is formed a slippage preventive uneven portion  32   g   2 . In  FIG. 17A , in the right lower portion of the handle fix portion  32   g , there is formed a plate spring support portion  32   g   3 . Also, at the back of the slippage preventive uneven portion  32   g   2 , there is formed an operation space  32   g   4  into which the user can put his or her finger to operate it when a user pushes the back surface of the handle fix portion  32   g.    
     Downwardly of the handle fix portion  32   g , there is formed a CRUM mounting portion  32   h  as an example of a memory member mounting portion. On the CRUM mounting portion  32   h , there is provided a protect rib  32   h   1  and, in the protect rib  32   h   1 , there is formed a memory member mounting guide  32   h   2  as an example of a memory member mounting guide portion. In  FIGS. 17B ,  17 C and  18 , in the rear end portion of the CRUM mounting portion  32   h , there is formed a paw engaging portion  32   h   3  as an example of a memory member fixing portion. 
     On the left of the handle fix portion  32   g , there is formed a waste developer flow-in opening  32   j . The waste developer flow-in opening  32   j  includes a round hole portion  32   j   1  and a removal preventive mounting time pass portion  32   j   2  extending downwardly from the round hole portion  32   j   1 . 
     In the periphery of the waste developer flow-in opening  32   j , there is provided, as an example of a leakage preventive member protect portion, a leakage preventive member protect rib  32   k  in such a manner that it surrounds the waste developer flow-in opening  32   j.    
     In the inside of the waste developer storage space  32   c  at the rear of the waste developer flow-in opening  32   j , there is formed a cylindrical-shaped energizing member support portion  32   m . The energizing member support portion  32   m  includes a rear end wall  32   m   1  functioning as an energizing member one end support portion. Also, the energizing member support portion  32   m  further includes a step-shaped removal preventive portion  32   m   2  formed in the front portion thereof. 
     In  FIGS. 17B ,  17 C and  18 , in the left outer surface of the waste side case main body  32   b , there is formed an uneven portion  32   n  for prevention of slippage. That is, in order to solve a technological problem to prevent a possibility that, when removing the toner cartridges TCy, TCm, TCc and TCk, they can slip off and fall down and can be thereby broken or contaminated with the developer, the slippage preventive uneven portion  32   n  is provided on the left outer surfaced of the waste side case main body  32   b  that may be held by a user with high possibility. 
     Downwardly of the slippage preventive uneven portion  32   n , as an example of a front side portion to be guided, there is formed a front side portion to be guided  32   p  which can be fitted with and guided by the front side guide portion  2   m  shown in  FIG. 6 . That is, in order to solve a technological problem to enhance the accuracy of the linear movement of the toner cartridges TCy, TCm, TCc and TCk when moving these toner cartridges forward from behind for mounting, there are formed the front side guide portion  2   m  and front side guided portion  32   p.    
     In  FIGS. 17C and 17D , left upwardly of the inside of the waste developer storage case  32   c , there is formed a wrong mounting time interference portion  32   q  which extends backwardly but does not project outwardly beyond the portion to be connected  32   d.    
     (Description of Partition Member) 
       FIG. 19  is a perspective view of a partition member according to the embodiment 1. Specifically,  FIG. 19A  is a perspective view when it is viewed from right front obliquely above, and  FIG. 19B  is a perspective view when it is viewed from right rear obliquely below. 
     In  FIGS. 14 ,  15  and  19 , the partition member  33 , which is used as an example of the other end side support member or opening closing member, includes an angular-plate-shaped partition member main body  33   a . On the front and rear surfaces of the partition member main body  33   a , there are provided seal portions  33   b  and  33   c  in such a manner that they edge the outer periphery edge of the partition member main body  33   a . In the partition member main body  33   a , as an example of the other side rotation support portion, there is formed a front side shaft support portion  33   d  at a position biased from the center of the main body  33   a  to the left thereof. The front side shaft support portion  33   d  is formed in a hollow conical shape which projects forwardly and, as shown in  FIG. 14C , in the inside thereof, there is formed a shaft insertion hole  33   e . In the left lower portion of the partition member main body  33   a , there is formed a wrong mounting time interfered portion  33   f  which projects forwardly. 
     According to the embodiment 1, the partition member main body  33   a  is made of resin and the seal portions  33   b ,  33   c  are made of rubber, while the partition member main body  33   a  and the seal portions  33   b ,  33   c  are formed as an integral body by two color molding. That is, in order to solve a problem to enhance the productivity of the partition member  33 , the partition member main body  33   a  and seal portions  33   b ,  33   c  are formed as an integral body. Also, in order to solve a technological problem to reduce the cost of the partition member, the seal portions  33   b  and  33   c  are formed only in the outer peripheral edge portion that must be sealed, whereas the seal portions  33   b  and  33   c  are not formed in the portions that need not be sealed. 
     In a state where the toner cartridges TCy, TCm, TCc and TCk have been assembled, the rear side seal portion  33   c  of the partition member  33  is pressed against the step-shaped partition member support portion  31   h   3  of the inner surface of the connecting portion  31   h  of the supply developer storage case  31   h , whereby the partition member  33  is held in an elastically compressed state. And, when the waste developer storage case  32  is mounted onto the supply developer storage case  31 , the front side seal portion  33   b  is pressed against the rear end of the portion to be connected  32   d  of the waste developer storage case  32 , whereby the partition member  33  is held in an elastically compressed state. Therefore, the supply developer storage space  31   f  and waste developer storage space  32   c  are separated from each other in such a manner that they are sealed with respect to each other. That is, in order to solve a technological problem to enhance the sealing performance of the partition member  33 , the thicknesses and hardness of the seal portions  33   b  and  33   c  are optimized. Also, in order to solve a technological problem to reduce the number of parts and thus reduce the cost of the partition member, the seal portions  33   b  and  33   c  are structured such that, in a state where the waste developer storage case  32  is mounted, they are compressed between the waste developer storage case  32  and supply developer storage case  31 . 
     By the way, the waste developer storage case  32  and partition member  33  are structured such that, when the waste developer storage case  32  is going to be mounted onto the supply developer storage case  31  in a state where the partition member  33  is mounted in an inverted manner or upside down, the wrong mounting time interfering portion  32   q  and wrong mounting time interfered portion  33   f  interferes with each other, thereby being unable to assemble the partition member  33 . That is, in order to solve a technological problem to prevent the wrong assembling of the partition member  33 , the wrong mounting time interfering portion  32   q  and wrong mounting time interfered portion  33   f  are provided. 
     (Description of Waste Developer Shutter) 
       FIG. 20  is a perspective view of a waste flow-in shutter according to the embodiment 1. Specifically,  FIG. 20A  is a perspective view when it is viewed from right front obliquely below,  FIG. 20B  is a perspective view when it is viewed from right rear obliquely above, and  FIG. 20C  is a perspective view when it is viewed from left rear obliquely above. 
     In  FIGS. 14 ,  15  and  20 , on the waste developer flow-in opening  32   j  of the waste developer storage case  32 , there is mounted a waste flow-in opening shutter  34  as an example of a waste developer flow-in opening/closing member. In  FIG. 20 , the waste flow-in opening shutter  34  includes a cylindrical shaped waste flow-in opening shutter main body  34   a  with the front side thereof closed. The waste flow-in opening shutter main body  34   a  includes, as an example of a removal preventive portion, a flexible plate spring portion  34   b  extending backwardly from the front end portion of the waste flow-in opening shutter main body  34   a . In the rear end of the plate spring portion  34   b , there is formed a removal preventive pawl portion  34   c . Therefore, when the waste flow-in opening shutter  34  is inserted into the waste developer flow-in opening  32   j , it is inserted in such a manner that the plate spring portion  34   b  is elastically deformed; and, when the removal preventive pawl portion  34   c  has passed through the removal preventive portion  32   m   2 , the plate spring portion  34   b  is elastically restored, thereby being able to prevent the forward slippage of the waste flow-in opening shutter  34 , that is, being able to prevent the waste flow-in opening shutter  34  against removal. 
     In  FIGS. 14C and 15 , on the energizing member support portion  32   m  of the waste developer storage case  32 , there is supported a shutter spring  36  as an example of an energizing member for always energizing the rear end of the waste flow-in opening shutter  34  forwardly. Therefore, the waste flow-in opening shutter  34 , normally, is held at a closing position for closing the waste developer flow-in opening  32   j  shown in  FIGS. 4 and 13A  not only by the energization of the shutter spring  36  but also by the removal preventive portion  32   m   2  and removal preventive pawl portion  34   c . Also, when the toner cartridges TCy, TCm, TCc and TCk are mounted onto the image forming apparatus main body U 1  as shown in  FIG. 3 , a waste developer delivery passage HGn (see  FIG. 27  which will be discussed later) extending from the sensitive cleaners CLy, CLm, CLc and CLk and the like pushes the waste flow-in opening shutter  34  into the inside of the waste developer storage case  32  against the energizing force of the shutter spring  36 , thereby allowing the waste developer to flow from the waste developer delivery passage HGh into the waste developer storage chamber  32   c.    
     By the way, according to the embodiment 1, in the front surface of the flow-in opening shutter main body  34   a , there is formed a guide recessed portion  34   a   1  which is composed of a circular-shaped recessed portion. The guide recessed portion  34   a   1  is contacted with a projecting portion (not shown) provided on the front end of the front end portion HGh 1  of the waste developer delivery passage HGh to guide the front end portion HGh 1  to the central portion of the flow-in opening shutter main body  34   a . This can prevent the front end portion HGh 1  of the waste developer delivery passage HGh from being shifted from the central portion of the flow-in opening shutter main body  34   a  due to the rickety motion thereof or the like. That is, the guide recessed portion  34   a   1  is formed in order to solve a technological problem to positively connect the developer delivery passage. 
     In  FIGS. 4 ,  13 A and  15 , on the front surface of the waste developer storage case  32 , at a position thereof that is situated inside the leakage preventive member protect rib  32   k  and surrounds the outer periphery of the waste developer flow-in opening  32   c , there is fixedly supported a flow-in opening leakage preventive member  37 . The flow-in opening leakage preventive member  37  according to the embodiment 1 is made of a so called sponge-like foaming material. According to the embodiment 1, in order to prevent the flow-in opening leakage preventive member  37  from being broken by the leakage preventive member protect rib  32   k , the thickness of the flow-in opening leakage preventive member  37  is set equal to the amount of projection of the leakage preventive member protect rib  32   k . That is, the leakage preventive member protect rib  32   k  is provided in order to solve a technological problem to prevent the breakage of the flow-in opening leakage preventive member  37 . 
     Also, an opening  37   a , which is formed in the elastic flow-in opening leakage preventive member  37 , is formed smaller in diameter than the waste developer flow-in opening  32   j . That is, in order to solve a technological problem to prevent the contamination due to the leakage of the developer, the opening  37   a  of the flow-in opening leakage preventive member  37  is formed smaller in diameter than the waste developer flow-in opening  32   j.    
     (Description of Cartridge Operation Handle) 
       FIG. 21  is an explanatory view of a handle according to the embodiment 1. Specifically,  FIG. 21A  is a perspective view when it is viewed from right front obliquely above,  FIG. 21B  is a perspective view when it is viewed from left front obliquely below,  FIG. 21C  is a perspective view when it is viewed from left rear obliquely above,  FIG. 21D  is a perspective view when it is viewed from right rear obliquely above,  FIG. 21E  is a perspective view when it is viewed from front,  FIG. 21F  is a perspective view when it is viewed from the direction of the arrow mark XXIF shown in  FIG. 21E ,  FIG. 21G  is a perspective view when it is viewed from the direction of the arrow mark XXIG shown in  FIG. 21E ,  FIG. 21H  is a perspective view when it is viewed from the direction of the arrow mark XXIH shown in  FIG. 21E ,  FIG. 21I  is a perspective view when it is viewed from the direction of the arrow mark XXII shown in  FIG. 21E , and  FIG. 21J  is a perspective view when it is viewed from the direction of the arrow mark XXIJ shown in  FIG. 21I . 
     In  FIGS. 4 ,  13  to  15  and  21 , on the handle fixing portion  32   g  of the waste developer storage case  32 , there is supported a handle  38  as an example of a hold member which a user holds when operating the toner cartridges TCy, TCm, TCc and TCk. The handle  38  includes a plate-shaped handle main body  38   a  as well as an upper end wall  38   b  and a right side wall  38   c  which are respectively formed on the upper end and right side of the handle main body  38   a  integrally therewith. 
     In the right side wall  38   c , there is formed a hole-shaped display portion  38   c   1  for showing the relative positions of the toner cartridges TCy, TCm, TCc and TCk to their associated cartridge storage cases  4  (whether the toner cartridges TCy, TCm, TCc and TCk are present in front of or at the rear of their associated cartridge storage cases  4 ). Therefore, for example, suppose the handle  38  is colored with a color (for example, white) different from the color (for example, black) of the remaining members and a recess-like display portion is formed in the while handle. When compared with a case where the color of the display portion is the same as the color of the handle main body, the color of the remaining members disposed on the deep side can be seen through the hole-shaped display portion  38   c   1 , so that a greater contrast can be obtained and thus it is easier to recognize the display portion. That is, the hole-shaped display portion  38   c   1  is formed in order to solve a technological problem to facilitate the visual confirmation of the display portion  38   c   1  by the user. 
     In the left end portion of the upper end wall  38   b , there is formed a rotation center recessed portion  38   b   1  into which the upper rotation center portion  32   g   1  can be fitted. The handle main body  38   a  includes an elastically deformable arm-shaped lower rotation center forming portion  38   d  formed in the lower end portion thereof. In the rotation center forming portion  38   d , there is formed a rotation center recessed portion  38   d   1  which is situated vertically downward of the rotation center recessed portion  38   b   1  and can be fitted with the lower rotation center portion  32   g   1 . Therefore, the handle  38  is rotatably supported on the handle fix portion  32   g  by the rotation center portion  32   g   1  and rotation center recessed portions  38   b   1 ,  38   d   1 . Also, in order to solve a technological problem to allow the handle  38  to be mounted onto the handle fix portion  32   g  easily, the elastically deformable rotation center forming portion  38   d  is formed and, when mounting the handle  38 , the rotation center forming portion  38   d  is elastically deformed provisionally and is mounted onto the rotation center portion  32   g   1 . 
     In  FIGS. 21C and 21D , on the lower portion of the rear surface of the handle main body  38   a , there is provided an elastically deformable plate spring portion  38   e . The plate spring portion  38   e  is supported on the plate spring support portion  32   g   3  of the handle fix portion  32   g  in such a manner that the leading end portion of the plate spring portion  38   e  is in contact with the plate spring support portion  32   g   3 . That is, in order to solve a technological problem to decrease the number of parts of the handle to thereby reduce the cost thereof and enhance the assembling efficiency thereof, the plate spring portion  38   e  is formed not as a separate member but is formed integrally with the handle  38 . 
     On the front surface of the handle main body  38   e , there is provided a slippage preventive uneven portion  38   f . In the left portion of the front surface of the handle main body  38   e , as an example of a mounting time engage and fix portion, there is formed an engage and fix portion  38   g  which projects forward. The engage and fix portion  38   g  includes an engaging pawl portion  38   g   1  which projects to the left and can be engaged with the lock portion  2   j  of the frame body  2 . 
     Therefore, when a user holds the handle  38  while pinching the front surface of the handle and the rear surface of the handle fix portion  32   g , the handle  38  is rotated and the plate spring portion  38   e  is elastically deformed and, when the user stops the holding of the handle  38 , the handle  38  returns to its normal position shown in  FIG. 13  due to its own elastic restoration. In  FIG. 4 , when the C color toner cartridge TCc is mounted, the handle  38  is returns to its normal position; and, therefore, the engaging pawl portion  38   g   1  is held in a state where it is engaged with the lock portion  2   j  and thus the movement of the toner cartridge TCc is regulated, that is, locked without holding the handle  38 . On the other hand, when the handle  38  is rotated while pinching it, the engaging pawl portion  38   g   1  is removed from the lock portion  2   j  to thereby remove the locking of the toner cartridge TCc, thereby being able to move the toner cartridge TCc backwardly. That is, according to the embodiment 1, in order to solve a technological problem that an operator can mount and remove easily without reading an operation manual or the like in the mounting and removing operation, there is employed such shape for the handle  38  as allows the user to pinch and rotate the handle  38  between the handle  38  and handle fix portion  32   g . Also, in order to solve a technological problem that, when the user wants to remove the toner cartridges TCy, TCm, TCc and TCk, they can be removed but, when not, they will not be removed, the handle  38  is structured such that, when the handle is pinched in order to push the toner cartridges TCy, TCm, TCc and TCk backward, the handle is rotated naturally and thus the locking of the toner cartridges is removed and, when not pinched, the toner cartridges are locked by the plate spring portion  38   e.    
     In  FIGS. 4 ,  13  and  15 , on the CRUM mounting portion  32   h  of the waste developer storage case  32 , there is removably supported a memory member  41 , a so called a CRUM (Customer Replaceable Unit Memory) for storing information about the toner cartridges TCy, TCm, TCc and TCk, for example, information about whether they are have not been used, information about whether the developer stored in the toner cartridges have been emptied, or information about the accumulated time used of the toner cartridges. The memory member  41  includes a thin CRUM main body  41   a  which, while including a substrate therein, is guided by the memory member mounting guide  32   h   2  and is disposed inside the protect rib  32   h   1 . That is, the protect rib  32   h   1  is provided in order to solve a technological problem to protect the memory member  41 . Also, in order to solve a technological problem to be able to mount the memory member  41  easily, the memory member mounting guide  32   h   2  is provided and the CRUM main body  41   a  is formed thin in thickness. 
     Also, the memory member  41  includes a connector portion  41   b  which extends from the substrate; and, when mounting the toner cartridges TCy, TCm, TCc and TCk, the connector portion  41   b  is fitted with and connected to the CRUM connector portion  2   k  (see  FIG. 6A ) to thereby allow the writing of information or the like. On the rear end portion of the CRUM main body  41   a , there is provided a pawl portion  41   c  which extends backwardly; and, the pawl portion  41   c  is fitted with the pawl engaging portion  32   h   3  and is thereby prevented against removal. And, when reusing the toner cartridges TCy, TCm, TCc and TCk, by removing the engagement between the pawl portion  41   c  and pawl engaging portion  32   h   3 , the memory member  41  can be removed. That is, the pawl portion  41   c  and pawl engaging portion  32   h   3  are formed in order to solve a technological problem to be able to mount and remove the memory member  41  easily. 
     In  FIGS. 14C ,  14 F and  15 , on the seal member bonding portion  31   w  of the supply developer storage case  31 , there is fixed and supported a circular-ring-shaped seal member  46  which prevents the developer from leaking from the supply developer storage space  31   f  through the shaft support hole  31   v . That is, the base-shaped seal member bonding portion  31   w  is formed in order to solve a technological problem to facilitate the mounting of the circular-ring-shaped seal member  46 . 
     In  FIGS. 13 and 15 , on the upper surface of the supply developer storage case  31 , there is bonded an information stated member  47 , a so called label on which information about the toner cartridges TCy, TCm, TCc and TCk is stated. 
     (Description of Cartridge Shutter) 
       FIG. 22  is an explanatory view of a cartridge shutter according to the embodiment 1. Specifically,  FIG. 22A  is a perspective view when it is viewed from obliquely above,  FIG. 22B  is a perspective view when it is viewed from obliquely below,  FIG. 22C  is a plan view,  FIG. 22D  is a view when it is viewed from the direction of the arrow mark XXIID shown in  FIG. 22C ,  FIG. 22E  is a view thereof when it is viewed from the direction of the arrow mark XXIIE shown in  FIG. 22C ,  FIG. 22F  is a view when it is viewed from the direction of the arrow mark XXIIF shown in  FIG. 22C ,  FIG. 22G  is a view when it is viewed from the direction of the arrow mark XXIIG shown in  FIG. 22C , and  FIG. 22H  is a view when it is viewed from the direction of the arrow mark XXIIH shown in  FIG. 22G . 
     In  FIGS. 13 to 15  and  22 , on the cartridge shutter guide portion  31   u  of the supply developer storage case  31 , there is supported a cartridge shutter  48  so as to be slidable in the back and forth direction, as an example of a discharge opening opening/closing member for opening and closing the supply developer discharge opening  31   t . The cartridge shutter  48  includes a shutter main body  48   a  and a rubber-made hermetically closing member, a so called seal member  48   b  bonded to the supply developer discharge opening  31   b  side of the shutter main body  48   a.    
     In  FIG. 22 , on the right and left sides of the shutter main body  48   a , as an example of an opening/closing member side guided portion, there are formed shutter guided portions  48   c  which are supported on the shutter guide portion  31   u . In the rear end of the shutter main body  48   a , there are formed engaging and regulating portions  48   c   1  which, in a state where the cartridge shutter  48  is closed, can be engaged with the end of the shutter guide portion  31   u  to regulate the movement of the cartridge shutter  48 . On the front right side portion of the shutter main body  48   a , there is provided a removal preventive projecting portion  48   d  made of a long and narrow projection which projects inwardly. The removal preventive projecting portion  48   d  can be fitted into the shutter removal preventive recessed portion  31   s   2  to thereby prevent the cartridge shutter  48  from being moved due to an unintentional external force. That is, in order to solve a technological problem to prevent the cartridge shutter  48  from moving unintentionally, or from slipping off from the shutter guide portion  31   u  (such slippage is the worst, if it occurs), there are formed the removal preventive projection portion  48   d  and shutter removal preventive recessed portion  31   s   2 . 
     In the front end of the shutter main body  48   a , as an example of an opening/closing member smoothly mounted portion, there is provided a shutter mounting guided portion  48   e  formed in a slope shape which slants as it goes forward. Therefore, owing to the cooperative operation of the shutter mounting guided portion  48   e  and shutter mounting guide portion  31   s   1 , when the cartridge shutter  48  is mounted onto the shutter guide portion  31   u , the former is difficult to be caught by the latter but can be mounted onto the latter smoothly and easily. That is, in order to solve a technological problem to be able to mount the cartridge shutter  48  easily, there are provided the shutter mounting guided portion  48   e  and shutter mounting guide portion  31   s   1 . 
     On the lower surface of the shutter main body  48   a , there is provided a fixing projection  48   f  which projects downwardly. When mounting the toner cartridges TCy, TCm, TCc and TCk, in a state where the cartridge storage cases  4  are rotated inwardly and are stored, the fixing projection  48   f  is fitted with the cartridge shutter fix portion  2   i  of the frame body  2  of the developer delivery device  1  to thereby regulate the movement of the cartridge shutter  48 . Therefore, when the cartridge storage cases  4  are rotated inwardly and are stored, the fixing projection  48   c  is engaged with and fixed to the shutter fix portion  2   i  to thereby prevent the movement of the shutter  48  in the back and forth direction. In this state, when the toner cartridges TCy, TCm, TCc and TCk are slided, the supply developer discharge opening  31   t  is moved relative to the cartridge shutter  48 , whereby the supply developer discharge opening  31   t  is opened and closed. That is, the shutter fix portion  2   i  and fixing projection  48   c  are provided in order to solve a technological problem to allow the relative movement between the cartridge shutter  48  and supply developer discharge opening  31   t  when mounting the toner cartridges TCy, TCm, TCc and TCk. 
     (Description of Delivery Member) 
       FIG. 23  is an explanatory view of the rotation shaft of an agitator as an example of a developer delivery member according to the embodiment 1. Specifically,  FIG. 23A  is a perspective view, and  FIG. 23B  is a side view when it is viewed from the direction of the arrow mark XXIIIB shown in  FIG. 23A . 
     In  FIGS. 9 ,  14  and  15 , within the supply developer storage space  31   f , there is rotatably supported an agitator  51  as an example of a developer delivery member. The agitator  51  includes a rotation shaft  52  longer than the length of the supply developer storage case  31  in the longitudinal direction thereof, and a film member  53  functioning as a delivery member main body supported on the rotation shaft  52 . In  FIG. 23 , the rotation shaft  52  includes a rotation shaft main body  52   a  which extends in the longitudinal direction of the rotation shaft  52  and has a quadratic prism shape. The rotation shaft main body  52  includes, in the other end portion (the front end portion) thereof, the other end side portion to be supported  52   b  which can be fitted into the shaft insertion hole  33   e  of the partition member  33  and can be rotatably supported; and, the leading end of the other end side portion to be supported  52   b  is structured such that it becomes narrower as it goes forward for easy fitting into the shaft insertion hole  33   e . That is, in order to solve a technological problem to enhance the efficiency of the operation to assemble the toner cartridges TCy, TCm, TCc and TCk, the rotation shaft  52  is formed so as to project outwardly from the opening  31   g  of the supply developer storage case  51  and the other end side portion to be supported  52  is formed in such a manner that the leading end side thereof becomes narrower, whereby the rotation shaft  52  can be easily mounted onto the partition member  33 . 
     In one end portion (rear end portion) of the rotation shaft main body  52   a , there is formed a one end side portion to be supported  52   c  which penetrates through the shaft support penetration hole  31   e  of the supply developer storage case  31  and projects outwardly. In the base end portion of the one end side portion to be supported  52   c , there is formed a mounting portion  52   c   1 . The mounting portion  52   c   1  includes a rearward extending portion  52   c   2  and a cylindrical portion  52   c   3  formed continuous with the rear end of the rearward extending portion  52   c   2 . 
     In  FIG. 23 , on one side surface of the rotation shaft main body  52   a , there are provided two or more agitate portions  52   d  which are projected outwardly and are used to agitate the developer. That is, the agitate portions  52   d  are provided in order to solve a technological problem to enhance the developer agitating performance of the agitator. 
     On the side surface of the rotation shaft main body  52   a  that is different from the agitate portions  52   d , as an example of a delivery member main body positioning portion, there are provided two film positioning projecting portions  52   e . On the right and left sides of each film positioning projecting portion  52   e , there are provided film fix portions  52   f  as an example of a delivery member main body fix portion formed to have a mushroom shape. 
       FIG. 24  is an explanatory view of a film member as an example of the delivery member of the agitator according to the embodiment 1. 
     In  FIGS. 9 ,  14 ,  15  and  24 , the film member  53  includes a rectangular thin film shaped film main body  53   a . According to the embodiment 1, in order to solve a technological problem to reduce the cost of the film member  53 , the film member  53  is made of a PET film of low cost. Also, in order to solve a technological problem that the film member can be rotated in contact with the inner peripheral surface of the supply developer storage case  31 , while being flexed, to agitate and deliver the developer efficiently, according to the embodiment 1, there is used a film having a thickness of the order of 100 μm. By the way, when the film is too thin, the film is too soft and thus the force of the film to press against the developer and agitate it is too weak; and, when the film is too thick, there is produced noise. 
     In the base end portion of the film main body  53   a  that is supported by the rotation shaft  52 , there are formed two positioning holes  53   b  and  53   c  which respectively correspond to their associated film positioning projecting portions  52   e  of the rotation shaft  52 . The two positioning holes  53   b  and  53   c  are structured such that, for the positioning purpose, one is formed as a round hole  53   b  and the other is formed as an elongated hole  53   c . On both sides of the respective positioning holes  53   b  and  53   c , there are formed two fixed holes  53   d  in such a manner that they correspond to the arranging positions of the film fix portion  52   f . The fixed hole  53   d  is formed in a shape which has a round hole in the central portion of a slit; and, when it penetrates through the film fix portion  52   f , it passes there while being elastically deformed and, after it has passed there, it is prevented against removal by the mushroom shaped leading end portion of the film fix portion  52   f . Referring here to the structures of the positioning holes  53   b ,  53   c , fixed holes  53   d , film positioning projecting holes  52   e  and film fix portions  52   f , in order to prevent the reverse mounting of the film member  53  onto the rotation shaft  52 , the axial-direction arrangement distances between the positioning hole  53   b , positioning hole  53   c  and fixed holes  53   d  are all set different from each other. That is, the positioning holes  53   b ,  53   c , fixed holes  53   d , film positioning projecting holes  52   e  and film fix portions  52   f  are arranged in order to solve a technological problem to prevent the wrong assembling of the rotation shaft  52  and film member  53 . 
     In the edge portion of the film main body  53   a  on the free end portion side thereof, there are formed at given intervals two or more main delivery cut portions  56  which respectively slant backwardly, that is, toward the supply developer discharge opening  31   t . In the base end side end portion of the main delivery cut portion  56 , there is formed a round-hole-shaped cut growth preventive portion  56   a  which is used to prevent the cut portion from growing during use. Between the main delivery cut portions  56 , there are formed two or more sub delivery cut portions  57 . The sub delivery cut portions  57  are structured such that they become larger as they are more distant from the supply developer discharge opening  31   b . That is, in order to solve a technological problem that the developer stored in the supply developer discharge space  31   f  can be delivered efficiently toward the supply developer discharge opening  31   t , there are formed the sub delivery cut portions  57  which become larger as they are more distant from the main delivery cut portions  56  and discharge opening  31   t.    
     In the position of the film main body  53   a  that corresponds to the supply developer discharge opening  31   t  along the axial direction of the rotation shaft  52 , there is formed a clogging preventive portion  58 . According to the embodiment 1, the clogging preventive portion  58  is constituted by a portion which is surrounded by a pair of cut portions  58   a  respectively formed along the diameter direction of the rotation shaft  52 ; and, in the base end side end portions of the cut portions  58   a  of the clogging preventive member  58  as well, there are formed cut growth preventive portions  58   b  respectively. With the rotation of the rotation shaft  52 , the clogging preventive portion  58  moves periodically into the supply developer discharge opening  31   t  to tear down the developer adherent to the supply developer discharge opening  31   t . That is, the clogging preventive portion  58  is provided in order to solve a technological problem that the supply developer discharge opening  31   t  is prevented from being clogged with developer discharged from the gravity direction to the slanting side direction to thereby stabilize the supply of the developer. 
     Also, in order to solve a technological problem to eliminate a possibility that, in rotation, the cut portion is caused to grow due to the force received from the developer to thereby break the film member  53 , the cut growth preventive portions  56   a  and  58   b  are respectively formed in the main delivery portion  56  and clogging preventive portion  58  which are large in the cut size and thus are liable to receive a large force. 
     According to the embodiment 1, the film main body  53   a  is set to have such a free length that allows it to rotate in contact with the inner peripheral surface of the supply developer storage space  31   f  while being flexed. Also, the clog preventive portion  58  rotates in contact with the inner peripheral surface of the supply developer storage space  31   f  while being flexed and the free length of the preventive portion  58  is set shorter than those of the other portions of the film main body  53   a.    
     Here, as shown in  FIG. 9 , in the case of the agitator  51  according to the embodiment 1, since the shaft support penetration hole  31   e  and shaft insertion hole  33   e  are formed not in the central portion of the flat-shaped supply developer storage space  31   f  but in the positions that are shifted to the supply developer discharge opening  31   t , the rotation shaft  52  is disposed at a position shifted to the supply developer discharge opening  31   t . Therefore, the rotation shaft  52  of the agitator  51  receives a force from the flexed film member  53 . At the then time, the rotation shaft  52  of the agitator  51  is rotatably supported on the rear end portion thereof in a cantilevered manner; and, to the front end portion thereof that is the free end portion thereof, there is applied a force which goes in the axial direction within a horizontal surface, whereby the front end portion of the rotation shaft  52  is caused to press the partition member  33  against the inner wall of the supply developer storage case  31  at right angles. Therefore, when the supply developer storage case  31  and waste developer storage case  32  are removed from each other, owing to the pressing force of the partition member  33  and the high friction resistance of the seal portions  33   b ,  33   c , there can be reduced the possibility that the partition member  33  can be naturally removed from the supply developer storage case  31 . 
       FIG. 25  is six views of a cartridge gear as an example of a delivery member drive transmission member according to the embodiment 1. Specifically,  FIG. 25A  is a side view,  FIG. 25B  is a view when it is viewed from the direction of the arrow mark XXVB shown in  FIG. 25A ,  FIG. 25C  is a view when it is viewed from the direction of the arrow mark XXVC shown in  FIG. 25A ,  FIG. 25D  is a view when it is viewed from the direction of the arrow mark XXVD shown in  FIG. 25A ,  FIG. 25E  is a view when it is viewed from the direction of the arrow mark XXVE shown in  FIG. 25A , and  FIG. 25F  is a view when it is viewed from the direction of the arrow mark XXVF shown in  FIG. 25E . 
     In  FIGS. 13 to 15  and  25 , in the rear end of the supply developer storage case  31 , as an example of a delivery member drive transmission member, a cartridge gear  61  is mounted on the rear end portion of the one end side supported portion  52   c  of the rotation shaft  52  that projects rearward. In  FIG. 25 , the cartridge gear  61  includes a disk-shaped gear main body  61   a  with gear teeth formed on the outer periphery thereof, and a portion to be mounted  61   b  which projects forward from the central portion of the gear main body  61   a.    
     The portion to be mounted  61   b  includes in the interior thereof a penetration hole  61   c  through which the one end side portion to be supported  61   c  can penetrate. The portion to be mounted  61   b  also includes in the front end portion thereof a pair of recessed portions to be mounted  61   d  which extends rearward. Each recessed portion to be mounted  61   d  includes a mounting guide portion  61   d   1  which guides the rearward extending portion  52   c   2  and cylindrical portion  52   c   3  and is fitted with them, and a mounting and fixing portion  61   d   2  having a narrow width portion smaller in width than the cylindrical portion  52   c   3 . Therefore, when the mounting portion  52   c   1  of the rotation shaft  52  is matched to the pair of recessed portions to be mounted  61   d , the rotation shaft  52  can be in phase with the cartridge gear  61 . That is, in order to solve a technological problem to mount the agitator  51  in such a manner that it is in given phase, there are formed the recessed portions to be mounted  61   d  and mounting portion  52   c   1 . 
     Also, in a state where the rotation shaft  52  is in phase with cartridge gear  61 , when any one of the mounting portions  52   c   1  of the one end side portion to be supported  52   c  is pushed into the mounting and fixing portion  61   d   2 , that is, the former is so called snap fitted into the latter, the agitator  51  can be fixed. In other words, in order to solve a technological problem to be able to easily mount and fix the agitator  51  onto the cartridge gear  61  with a small force, not only the rotation shaft  52  is structured such that, on both sides thereof, there are formed the rearward extending portion  52   c   2  and cylindrical portion  52   c   3  for snap fit fixation, whereby the rotation shaft  52  can be engaged with the cartridge gear  61  on both sides thereof; but also, the cartridge gear  61  is structured such that the mounting and fixing portion  61   d   2  for snap fit fixation is formed only on one side thereof. 
     In a state where the toner cartridges TCy, TCm, TCc and TCk are mounted, the cartridge gear  61  is meshingly engaged with the cartridge drive gear  20   a  and a drive force is transmitted to the cartridge gear  61 , whereby the agitator  51  can be driven and rotated. 
     (Description of Method for Mounting Toner Cartridge) 
       FIG. 26  is an explanatory view to show how to mount a toner cartridge according to the embodiment 1. Specifically,  FIG. 26A  is an explanatory view to show the middle state of a step of mounting the toner cartridge into its associated cartridge storage case or removing the former from the latter,  FIG. 26B  is an explanatory view to show a state where the toner cartridge has been inserted into the deep portion of the cartridge storage case,  FIG. 26C  is an explanatory view to show a state where the cartridge storage case has been rotated inside and stored into the cartridge mounting portion, and  FIG. 26D  is an explanatory view to show a state where the toner cartridge has been moved forward from the state shown in  FIG. 26C  to its mounting position. 
     In  FIGS. 1 ,  3 ,  4  and  26 A, when mounting a new toner cartridge TCy, TCm, TCc and TCk, in a state where the side cover U 3  is opened, the toner cartridge TCy, TCm, TCc and TCk is inserted in a state where the cartridge storage case  4  is rotated obliquely. At the then time, while the rib to be guided  31   n  provided on the bottom portion of the toner cartridge TCy, TCm, TCc and TCk is guided by the guide rib  4   b  of the cartridge storage case  4 , the toner cartridge TCy, TCm, TCc and TCk is inserted into a given position. 
     In  FIG. 26B , when the toner cartridge TCy, TCm, TCc and TCk is inserted into the inmost portion of the cartridge storage case  4 , the mounting sense operation engaging portion  32   c   1  is contacted with the mounting sense operation portion  4   d  to thereby provide a mounting sense and, at the same time, the mounting time positioned portion  31   k  is fitted into the positioning cut-away portion  4   c , thereby completing the insertion of the toner cartridge. At the then time, the rotation regulate portion  2   g  of the frame body  2  passes above the member pass portion  31   p  and arrives at the front end portion of the slanting portion  31   m   1  of the mounting position rotation regulated portion  31   m.    
     When a user pushes the cartridge storage case  4  to rotate it inside from the state shown in  FIG. 26B , as shown in  FIG. 26C , the cartridge storage case  4  is stored into the cartridge mounting portion  3  against the force of the plate spring SP in contact with the left wall portion  31   d  of the toner cartridge TCy, TCm, TCc and TCk. 
     At the then time, the rotation regulate portion  2   g  moves into the slanting portion  31   m   1  of the mounting position rotation regulated portion  31   m  and arrives at the connecting portion between the slanting portion  31   m   1  and rearward extending portion  31   m   2 . Also, the cartridge gear  61  of the toner cartridge TCy, TCm, TCc and TCk is situated at the rear of the cartridge drive gear  20   a . Further, the fixing projection  48   f  of the cartridge shutter  48  is fitted into the cartridge shutter fix portion  2   i , thereby regulating the back and forth direction movement of the cartridge shutter  48 . 
     Also, at a storage position shown in  FIG. 26C , the shutter moving projection  31   r  of the toner cartridge TCy, TCm, TCc and TCk presses against the shutter lock portion  5   b  inside to deform it elastically, thereby removing the locking of the main body side shutter  7 . That is, according to the present embodiment, in order to solve a technological problem to prevent the main body shutter  7  from being opened in an unintentional condition, there are provided the shutter lock portion  5   b  and shutter moving projection  31   r , whereby, when mounting the toner cartridge TCy, TCm, TCc and TCk, the locking of the main body shutter  7  can be removed. 
     In a state shown in  FIG. 26C , when the user puts a finger into the operation space  38   g   4  of the toner cartridge TCy, TCm, TCc and TCk and pushes forward the rear surface of the handle fix portion  32   g  which is prevented against slippage by the slippage preventive uneven portion  32   g   2 , as shown in  FIG. 26D , the toner cartridge TCy, TCm, TCc and TCk is moved to the forward mounting position. Since the toner cartridge TCy, TCm, TCc and TCk is moved in a state where the movement of the cartridge shutter  48  is regulated by the fixing projection  48   f , the supply developer discharge opening  31   t  of the toner cartridge TCy, TCm, TCc and TCk is opened. At the then time, in a state where the locking of the main body side shutter  7  is removed by the shutter moving projection  31   r , the main body side shutter  7  is pushed by the front end portion of the discharge opening forming portion  31   s  of the forward moving toner cartridge TCy, TCm, TCc and TCk and is thereby slided forward, so that the flow-in opening  6  is also opened. Thus, the supply developer discharge opening  31   t  of the toner cartridge TCy, TCm, TCc and TCk is connected to the flow-in opening  6 . 
     When the toner cartridge TCy, TCm, TCc and TCk moves to the forward mounting position, the rotation regulate portion  2   g  is situated at the rear end portion of the rearward extending portion  31   m   2  and the rotation regulate portion  2   g  is regulated in such a manner that the movement thereof in the right and left direction is prevented by the rearward extending portion  31   m   2 . Owing to this, the rotation of the rear end portion of the toner cartridge TCy, TCm, TCc and TCk is prevented against the force of the plate spring to move the cartridge storage case  4  outward. Therefore, as shown in  FIGS. 26B to 26D , the rotation regulate portion  2   g  is set such that it can be moved following a locus along the slanting portion  31   m   1  and rearward extending portion  31   m   2  of the mounting position rotation regulated portion  31   m . That is, according to the embodiment 1, in order to solve a technological problem to eliminate the possibility that the toner cartridge TCy, TCm, TCc and TCk can rotate outward in an unintentional condition to thereby remove the connection between the flow-in opening  6  and supply developer discharge opening  31   t , there are provided the rotation regulate portion  2   g  and mounting position rotation regulated portion  31   m.    
     Also, when the toner cartridge TCy, TCm, TCc and TCk moves from the insertion position shown in  FIG. 26C  to the mounting position shown in  FIG. 26D , the cartridge gear  61  meshes with the cartridge drive gear  20   a  and thus it is supported in such a manner that a drive force can be transmitted thereto from the cartridge drive gear  20   a . At the then time, owing to the member pass portion  31   p , the cartridge drive gear  20   a  is allowed to mesh with the cartridge gear  61  without touching or interfering the supply developer storage case  31 . 
     Further, when the toner cartridge TCy, TCm, TCc and TCk moves forward, the front side portion to be guided  32   p  of the toner cartridge TCy, TCm, TCc and TCk is fitted with the front side guide portion  2   m  of the frame body  2 , so that the toner cartridge TCy, TCm, TCc and TCk can be guided to a given position in such a manner that it shakes less. Also, in a state where the toner cartridge TCy, TCm, TCc and TCk has been moved to the mounting position, owing to the mutual engagement between the front side guide portion  2   m  and front side portion to be guided  32   p , the movement of the toner cartridge TCy, TCm, TCc and TCk in the right and left direction is prevented, which prevents the rotation of the front side of the toner cartridge TCy, TCm, TCc and TCk. That is, according to the embodiment 1, the front side guide portion  2   m  and front side portion to be guided  32   p  are provided in order not only to attain an object to guide the toner cartridge TCy, TCm, TCc and TCk with good linearity but also to solve a technological problem to prevent the toner cartridge TCy, TCm, TCc and TCk from rotating outward in an unintentional condition and thus prevent the connection between the flow-in opening  6  and supply developer discharge opening  31   t  from being removed. 
     Also, at the then time, in the waste developer storage case  32 , the flow-in shutter  34  is pushed by the waste developer delivery passage HGn and is thereby moved inside, whereby the waste developer is allowed to flow into the waste developer storage space  32   c . In this case, the waste developer delivery passage HGn is positively guided to the flow-in opening shutter  34  due to the guide recessed portion  34   a   1 , thereby connecting together the waste developer delivery passage HGn and waste developer storage space  32   c.    
     Also, when the toner cartridge TCy, TCm, TCc and TCk moves forward, the engage pawl portion  38   g   1  of the engage and fix portion  38   g  of the toner cartridge TCy, TCm, TCc and TCk touches the frame body main body  2   a  before the lock portion  2   j  and the handle  38  is thereby rotated; and, after then, when the engage pawl portion  38   g   1  reaches the position of the lock portion  2   j , the engage pawl portion  38   g   1  is returned due to the plate spring portion  38   e  and is thereby engaged with the lock portion  2   j . This prevents the toner cartridge TCy, TCm, TCc and TCk against movement in the back and forth direction, that is, the toner cartridge TCy, TCm, TCc and TCk is locked. Therefore, the toner cartridge TCy, TCm, TCc and TCk according to the embodiment 1, at the mounting position, is locked in the back and forth direction as well as in the right and left direction. As regards the movement of the toner cartridge TCy, TCm, TCc and TCk in the vertical direction, since it is stored within the cartridge storage case, it cannot be taken out in the vertical direction. 
     Further, when the toner cartridge TCy, TCm, TCc and TCk moves forward, the connector portion  41   b  is connected to the CRUM connector portion  2   k , thereby being able to read and update the information that is stored in the memory member  41 . 
     (Description of Method for Removing Toner Cartridge) 
     In  FIG. 26D , in an operation to remove the toner cartridge TCy, TCm, TCc and TCk, when a user pinches the handle  38  in order to remove the toner cartridge TCy, TCm, TCc and TCk, the handle  38  is rotated and the engage pawl portion  38   g   1  is removed from the lock portion  2   j  to thereby remove the locking of the toner cartridge TCy, TCm, TCc and TCk. Owing to this, the toner cartridge TCy, TCm, TCc and TCk is held in a state where it can be moved backward and thus, while pinching the handle  38 , the user can push and move the toner cartridge TCy, TCm, TCc and TCk backward. When the toner cartridge TCy, TCm, TCc and TCk moves backward, the engagement and connection of the cartridge gear  61 , waste developer delivery passage, connector portion  41   b  and the like are removed. 
     At the then time, the main body side shutter  7  is pushed by the shutter moving projection  31   r  of the toner cartridge TCy, TCm, TCc and TCk and is thereby moved backward, so that the flow-in opening  6  is closed. Also, since the toner cartridge TCy, TCm, TCc and TCk is moved backward with respect to the unmovable cartridge shutter  48 , the supply developer discharge opening  31   t  is also closed. 
     When the toner cartridge TCy, TCm, TCc and TCk moves from the mounting position shown in  FIG. 26D  to the mounting position shown in  FIG. 26C , the front side guide portion  2   m  and front side portion to be guided  32   p  are separated from each other. Also, the rotation regulate portion  2   g  is moved to the connecting portion between the slanting portion  31   m   1  and rearward extending portion  31   m   2 . Therefore, in this state, since the prevention of the rotation of the toner cartridge TCy, TCm, TCc and TCk not only by the front side guide portion  2   m  and front side portion to be guided  32   p  but also by the rotation regulate portion  2   g  and mounting position rotation regulated portion  31   m  is removed, due to the spring force of the plate spring SP, the toner cartridge TCy, TCm, TCc and TCk is automatically moved to the insertion position shown in  FIG. 26B  which is the position where the cartridge storage case  4  is rotated outside. That is, according to the embodiment 1, in order to solve a technological problem to facilitate the toner cartridge removing operation, there is provided the plate spring SP. 
     In the insertion position shown in  FIG. 26B , the toner cartridge TCy, TCm, TCc and TCk can be inserted and extracted and, therefore, the toner cartridge TCy, TCm, TCc and TCk can be pulled out from the cartridge storage case and can be removed therefrom. 
     (Method for Reusing Toner Cartridge) 
     In  FIGS. 13 to 15 , to recycle or reuse a used toner cartridge TCy, TCm, TCc and TCk, firstly, the tape TP of the toner cartridge TCy, TCm, TCc and TCk is unwound and taken away to thereby remove the connection between the connecting hole  31   j  and pawl portion  32   e . At the then time, since the waste developer is stored in the waste developer storage space  32   c , by removing the toner cartridge TCy, TCm, TCc and TCk with the waste developer storage case  32  facing downward in the gravity direction, the developer of the waste developer storage case  32  is prevented from leaking from the waste developer storage case  32 . In this case, since the pressing force of the film member  53  reduces the possibility of the partition member  33  being removed outward, there can be reduced the possibility that, in a state where a small amount of developer remains in the supply developer storage space  31   f , unintentionally, the partition member  33  can be removed to thereby allow the developer to leak out of the supply developer storage space  31   f . After the waste developer storage case  32  is removed, in a state where the supply developer storage case  31  is set downward of the partition member  33 , when the partition member  33  is removed in such a manner that it is pulled out in the axial direction of the rotation shaft  52 , the developer remaining in the supply developer storage space  31   f  can be prevented against leakage. Next, when the snap-fit mounted agitator  51  is removed, the toner cartridge TCy, TCm, TCc and TCk can be decomposed. After decomposition, the respective composing members of the toner cartridge TCy, TCm, TCc and TCk are cleaned. Then, after the agitator  51  is mounted, a new developer is stored into the supply developer storage space  31   f , the partition member  33  and waste developer storage case  32  are mounted sequentially, and the tape TP is wound on the toner cartridge TCy, TCm, TCc and TCk, whereby the toner cartridge TCy, TCm, TCc and TCk can be reused. 
     Operation of Embodiment 1 
     In the printer U as an example of an image forming apparatus having the above-mentioned structure according to the embodiment 1, when the toner of the developing device Gy, Gm, Gc and Gk is consumed due to the image forming operation, the developer of the supply developer storage space  31   f  of the toner cartridge TCy, TCm, TCc and TCk is supplied from the flow-in opening  6 . At the then time, with the image forming operation, the waste developer collected by the image holder cleaner CLy, CLm, CLc and CLk is collected into the waste developer storage space  32   c.    
     In the toner cartridge TCy, TCm, TCc and TCk, the developer collected into the supply developer storage case  31  having a flat shape is prevented from generating a so called blocking phenomenon in which the developer hardens or blocks due to its own weight and, at the same time, when the developer is agitated by the agitator  51 , the block state of the developer can be broken easily and positively. Also, since the agitator  51  is structured such that the cartridge gear  61  is supported on the rear end thereof and the supply developer discharge opening  31   t  is formed on the rear end side thereof, the twisting and vibration of the rotation shaft  52  of the agitator  51  can be reduced in the drive transmission time, which can stabilize the discharge of the developer from the toner cartridge TCy, TCm, TCc and TCk to the developer delivery device  1 . Since the center of rotation of the agitator  51  is shifted from the center thereof, the distance between the center of rotation and the inner peripheral surface of the supply developer storage space  31   f  varies with the rotation of the agitator  51  and the sagging of the film member  53  varies. Owing to the variations in the flexing motion of the film member  53 , the film member  53  is allowed to leap or bounce within the supply developer storage space  31   f , the agitation performance of the developer can be enhanced, the block state of the developer can be reduced, and the supply of the developer can be stabilized. Especially, since the supply developer storage space  31   f  formed within the supply developer storage case  31  according to the embodiment 1 is formed to have a substantially square-shaped section, the film member  53  is able to bounce greatly within the supply developer storage space  31   f.    
     Also, since the supply developer storage space  31   f  the other end side, that is, the front side of the rotation shaft  52  of the agitator  51  is supported by the partition member  33 , the deviation of the rotation shaft  52  is reduced when compared with a structure where the other end side of the rotation shaft  52  is not supported, thereby being able to stabilize the supply of the developer. Further, since the clogging preventive portion  58  moves into the supply developer discharge opening  31   t  periodically, the supply developer discharge opening  31   t  disposed in the lateral side of the supply developer storage case  31  is difficult to be clogged with the developer, which can stabilize the supply of the developer. Also, since the clogging preventive member  21  moves into the flow-in opening  6  periodically, the laterally disposed flow-in opening  6  is difficult to be clogged with the developer, thereby being able to stabilize the supply of the developer. 
     Further, in the printer U according to the embodiment 1, when the toner cartridge TCy, TCm, TCc and TCk is decomposed, the possibility of the partition member  33  being removed due to its own weight is reduced by the pressing force of the film member  53  and, in a state where the developer remains in a small amount in the supply developer storage space  31   f , there is reduced the possibility that the partition member  33  can be removed to thereby allow the developer to leak from the supply developer storage space  31   f  unintentionally. When removing the partition member  33  from the supply developer storage case  31 , by extracting the partition member  33  in the axial direction of the rotation shaft  52  with the supply developer storage case  31  held downwardly of the partition member  33 , the partition member  33  can be removed easily. 
     By the way, according to the embodiment 1, since the rotation shaft  52  is longer than the supply developer storage case  31  and projects outward from the opening  31   g , the rotation shaft  52  is distant from the shaft support hole  31   v  which does not vary in position, whereby the vibration of the rotation shaft  52  increases and the pressing force thereof increases. That is, the force, with which the partition member  33  is pressed against the supply developer storage case  31 , increases, thereby making it difficult for the partition member  33  to be removed from the supply developer storage case  31 . 
     Modification 
     Although the embodiment of the invention has been described heretofore in detail, the invention is not limited to the embodiment but various changes and modifications are possible without departing from the scope of the subject matter of the invention as set forth in the scope of the patent claims. The modifications of the invention (H01 to H09) are as follows. 
     (H01) In the above-mentioned embodiment, there is illustrated a printer functioning as an image forming apparatus. However, the invention is not limited to this but it is also possible to employ a FAX, or a copying machine, or a composite machine having all functions of them or two or more functions. Also, the invention is not limited to an image forming apparatus capable of developing multiple colors but there can also be employed an image forming apparatus capable of developing a single color, that is, a so called monochrome. Also, the invention is not limited to a structure in which an image is transferred from an image holder to a medium, but the invention can also be applied to a structure using an intermediate transfer member. 
     (H02) In the above embodiment, when the clogging state is hard to occur, the clogging preventive members  21 ,  58  can be omitted. 
     (H03) In the above embodiment, there is illustrated a developer storage case which includes both the supply developer storage case  31  and waste developer storage case  32 . However, this is not limitative but the waste developer storage case  32  may be omitted or may be structured as a separate unit. 
     (H04) In the above embodiment, although the developer delivery passage  11  is curved, it may also be structured to be linear. In this case, the developer delivery member  17  may not be made of flexible resin material but may also be made of high rigidity material. 
     (H05) In the above embodiment, there is illustrated a structure in which the toner flows in a slanting direction near to the horizontal direction through the flow-in opening  6 . However, this is not limitative but there may also be employed a structure in which the toner flows in the gravity direction or in a slanting direction near to the gravity direction. 
     (H06) In the above embodiment, there is illustrated a gear as a drive transmission member. However, this is not limitative but it is also possible to use a conventionally known drive transmission member such as a so called coupler (coupling). 
     (H07) In the above embodiment, the rotation shaft  52  may preferably be disposed at a position shifted to the discharge opening  31   t  but may also be disposed in the central portion. 
     (H08) In the above embodiment, there is employed a structure in which there can be mounted and removed the visible image forming devices UY to UK each including an image holder cartridge and a developing cartridge. However, this is not limitative but, for example, it is also possible to employ a structure in which only the image holder cartridge can be mounted and removed but the developing device is fixed to the main body of the image forming apparatus, or a structure in which the visible image forming devices UY to UK are all fixed to the apparatus main body. 
     (H09) In the above embodiment, there may also be employed a structure in which there is provided a sensor for detecting the rotation position of the agitator  51  and, when the image forming apparatus is kept in a warehouse or when the image forming operation is ended, the image forming apparatus is held in a state where the clogging preventive member  58  is held within the developer discharge opening  31   t . According to this structure, not only the developer is difficult to block in the developer discharge opening  31   t  but also, if blocked, the blocked developer is easy to break. 
     The foregoing description of the embodiments of the present invention has been provided for the purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations will be apparent to practitioners skilled in the art. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, thereby enabling others skilled in the art to understand the invention for various embodiments and with the various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention defined by the following claims and their equivalents.