Patent Publication Number: US-11048191-B2

Title: Developer supply container

Description:
FIELD OF THE INVENTION AND RELATED ART 
     The present invention relates to a developer supply container suitably usable with an image forming apparatus of a electrophotographic type, such as a printer, a copying machine, a facsimile machine, a multifunction machine and so on. 
     In an image forming apparatus of the electrophotographic type, an image is formed using the developer, and the developer is consumed in accordance with the image forming operation. Therefore, the image forming apparatus is equipped with a developer supply device for supplying the developer into the image forming apparatus. Japanese Laid-open Patent Application 2006-308781 discloses a developer supplying apparatus to which a developer supply container containing the developer to be supplied into the image forming apparatus is detachably mountable. The developer supply container comprises a discharging chamber (discharging portion) provided with a discharge opening, and an accommodating chamber (accommodating portion) capable of accommodating the developer, the accommodating chamber being rotatable relative to the discharging portion. The accommodating portion is engaged with the discharging portion with a gap in order to permit the rotation (loose fitting), and therefore, a sealing member in the form of a ring is provided to prevent leakage of the developer through the gap the to the outside of the developer supply container. 
     When the loose fitting is used between the accommodating portion and the discharging portion, a whirling motion tends to occur in which the accommodating portion moving in the radial direction crossing with the rotational axis direction, due to variations in the parts of the device and variation in the rotational load, or the like. If this occurs, there is a liability that the developer leaks through the contact portion between the accommodating portion and the sealing member. For this reason, an elastic sealing member is used, and the sealing member is compressed in the rotational axis direction by the discharging portion and the accommodating portion, so as to suppress the whirling motion of the accommodating portion. In addition, with the structure disclosed in the Japanese Laid-open Patent Application 2006-308781, a contact surface of the sealing member in the discharging portion or the accommodating portion is slanted, so that a strong force is produced by the sealing member against the whirling motion during the rotation of the accommodating portion, in order to suppress the whirling motion. 
     When the loose fitting is used between the accommodating portion and the discharging portion, the accommodating portion may rotate with inclination in the radial direction relative to the discharging portion. Particularly when the accommodating portion is rotated through a driving force transmission from an external driving source using a gear portion provided at the outer circumferential periphery of the accommodating portion (a radial forces applied by the driving load), the accommodating portion may rotate with the inclination relative to the discharging portion. With the structure of the developer supply container disclosed in the above-mentioned patent document, the whirling may occur with the accommodating portion inclined. In such a case, the pressure applied in the rotational axis direction to the sealing member is not even over the circumference. Then, the sealing member may be locally deformed at the position where the pressure is large. If this occurs, the elasticity of the sealing member at such a position is lost, with the result that the information may increase to such an extent that a gap is produced between the sealing member. 
     Accordingly, it is a object of the present invention to provide a developer supply container in which the whirling of the accommodating portion is suppressed by the sealing member, and that deformation of the sealing member attributable to the rotation of the accommodating portion with the inclination relative to the discharging portion is suppressed. 
     Further features of the present invention will become apparent from the following description of exemplary embodiments with reference to the attached drawings. 
     SUMMARY OF THE INVENTION 
     According to an aspect of the present invention, there is provided a developer supply container comprising an accommodating portion including one end portion provided with an opening, and drive receiving portion provided at a outer circumference and configured to receive a rotational driving force from a outside, wherein a developer accommodated in said accommodating portion is fed toward the opening by rotation of said accommodating portion: a discharging portion including a receiving portion into which said one end portion of said accommodating portion is inserted, and a discharge opening configured to discharge the developer supplied through said opening of said accommodating portion, wherein said accommodating portion is mounted to said discharging portion so as to be rotatable relative to said discharging portion; a sealing member configured to seal between said one end portion and said receiving portion by being elastically compressed between said one end portion of said accommodating portion and a part of said receiving portion of said discharging portion, with respect to a direction in which said one end portion is inserted into said accommodating portion; a projection projecting from an outer peripheral surface of said accommodating portion in a radial direction crossing with a rotational axis direction of said accommodating portion; and a first restricting portion and a second restricting portion provided on said receiving portion of said discharging portion at positions upstream and downstream of said projection, respectively in the inserting direction and contactable to said projection to restrict an inclination of the rotational axis of said accommodating portion relative to the inserting direction within a predetermined range. 
     According to another aspect of the present invention, there is provided a developer supply container comprising: an accommodating portion including one end portion provided with an opening, and drive receiving portion provided at a outer circumference and configured to receive a rotational driving force from a outside, wherein a developer accommodated in said accommodating portion is fed toward the opening by rotation of said accommodating portion: a discharging portion including a receiving portion into which said one end portion of said accommodating portion is inserted, and a discharge opening configured to discharge the developer supplied through said opening of said accommodating portion, wherein said accommodating portion is mounted to said discharging portion so as to be rotatable relative to said discharging portion; a sealing member configured to seal between said one end portion and said receiving portion by being elastically compressed between said one end portion of said accommodating portion and a part of said receiving portion of said discharging portion, with respect to a direction in which said one end portion is inserted into said accommodating portion; a first projection and a second projection arranged in the inserting direction with a space therebetween, said first projection and said second projection projecting from a outer peripheral surface of said accommodating portion in a radial direction crossing with a rotational axis direction of said accommodating portion; and a restricting portion provided on said receiving portion of said discharging portion at a position between said first projection and said second projection in the inserting direction and contactable to said second projection to restrict an inclination of said rotational axis of said accommodating portion relative to the inserting direction. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a sectional view of an image forming apparatus usable with the developer supply container according to an embodiment of the present invention. 
         FIG. 2  is a schematic view of a developing device. 
       Part (a) of  FIG. 3  is a perspective view of an outer appearance of a mounting portion, and part (b) of  FIG. 3  is a sectional view of the mounting portion. 
         FIG. 4  is an enlarged view illustrating the developer supply container and a developer supplying apparatus. 
       Part (a) of  FIG. 5  is a perspective view of an outer appearance of the developer supply container, and part (b) of  FIG. 5  is a perspective section of view of the developer supply container. 
         FIG. 6  is an enlarged perspective view of an accommodating portion according to a further embodiment of the present invention. 
         FIG. 7  is a perspective view of a flange portion in the first embodiment. 
       Part (a) of  FIG. 8  is a partial view in a state in which a pump portion is expanded to the maximum usable limit, and part (b) of  FIG. 8  is a partial view in a state in which the pump portion is contracted to the minimum usable limit. 
       Part (a) of  FIG. 9  is a partial sectional view illustrating the mounting of a flange portion and the accommodating portion, in the first embodiment, and part (b) is a partial enlarged view illustrating the mounting of the flange portion and the accommodating portion, in the first embodiment. 
         FIG. 10  is a schematic view illustrating restriction of the accommodating portion relative to the flange portion, in the first embodiment. 
         FIG. 11  is a graph of comparison between the embodiment and a comparison the example in deformation of a sealing member. 
         FIG. 12  is a perspective view of a flange portion in the second embodiment of the present invention. 
       Part (a) of  FIG. 13  is a partial sectional view illustrating mounting of the flange portion and the accommodating portion, in the second embodiment of the present invention, and part (b) of  FIG. 13  is a partial enlarged sectional view illustrating mounting of the flange portion and the accommodating portion. 
         FIG. 14  is an enlarged perspective view of an accommodating portion in a third embodiment of the present invention. 
         FIG. 15  is a perspective view of the flange portion in the third embodiment. 
       Part (a) of  FIG. 16  is a partial sectional view illustrating mounting of the flange portion and the accommodating portion, and part (b) of  FIG. 16  is a partial enlarged sectional view illustrating mounting of the flange portion and the accommodating portion. 
         FIG. 17  is a perspective view of the accommodating portion and the flange portion in a fourth embodiment of the present invention. 
       Part (a) of  FIG. 18  is a partial sectional view illustrating mounting of the flange portion and the accommodating portion in the fourth embodiment, and part (b) of  FIG. 18  is a partial enlarged sectional view illustrating mounting of the flange portion and the accommodating portion in the fourth embodiment. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     First Embodiment 
     In the following, an image forming apparatus according to this embodiment will be described. First, a summary of the image forming apparatus will be described and then a developer supply device and a developer supply container which are mounted in this image forming apparatus will be described. 
     (Image Forming Apparatus) 
     As the image forming apparatus in which the developer supply container is mountable in and dismountable from the developer supply device, the image forming apparatus employing an electrophotographic type will be described with reference to  FIG. 1 . 
     As shown in  FIG. 1 , an image forming apparatus  100  includes an original supporting platen glass  102 , and an original  101  is placed on this original supporting platen glass  102 . Then, an optical image depending on image information of the original  101  is formed on a photosensitive member  104  electrically charged uniformly by a charger  203  in advance, by a plurality of mirrors M and a lens Ln of an optical portion  103 , whereby an electrostatic latent image is formed on the photosensitive member  104 . This electrostatic latent image is visualized with toner (one component magnetic toner) as a developer (dry powder) by a dry developing device (one component developing device)  201   a . That is, a toner image (developer image) is formed on the photosensitive member  104 . 
     In the image forming apparatus  100 , a plurality of cassettes  105 - 108  for accommodating recording materials (hereinafter referred to as sheets) are provided. Of these cassettes  105 - 108  in which sheets P are stacked, the sheet P is fed from either one of the cassettes selected on the basis of information or a size of the original  101  which are inputted by an operator through an operating portion (not shown) provided on the image forming apparatus  100 . Here, as the recording material (sheet), it is not limited to a sheet (paper), but for example, an OHP sheet and the like can be appropriately used and selected. 
     Then, a single sheet P fed by either one of feeding and separation devices  105 A- 108 A is fed to a registration roller pair  110  via a feeding portion  109 . Then, this sheet P is conveyed to a transfer portion in synchronism with rotation of the photosensitive member  104  and scanning by the optical portion  103 . 
     The transfer portion includes a transfer charger  111  and a separation charger  112 . The transfer charger  111  and the separation charger  112  are provided opposed to the photosensitive member  104 . The toner image formed on the photosensitive member  104  is transferred onto the sheet P by the transfer charger  111 . Then, by the separation charger  112 , the sheet P on which the developer image (toner image) is transferred is separated from the photosensitive member  104 . 
     Thereafter, the sheet P fed by a feeding portion  113  is heated and pressed in a fixing portion  114  and the developer image is fixed on the sheet P, and in the case of one-side copying, the sheet P passes through a discharging reverse portion  115  and is discharged to a discharge tray  117  by a discharging roller pair  116 . 
     On the other hand, in the case of double-side copying, the sheet P passes through the discharging reverse portion  115 , and a part of the sheet P is once discharged to an outside of the image forming apparatus  100  by the discharging roller pair  116 . Thereafter, at timing when a trailing end of the sheet P passes through a flapper  118  and is still sandwiched by the discharging roller pair  116 , and the sheet P is fed again in the image forming apparatus  100  by controlling the flapper  118  and by reversely rotating the discharging roller pair  116 . Thereafter, the sheet P is fed to the registration roller pair  110  via re-feeding conveying portions  119  and  120 , and then is fed along a path similar to the path in the case of the one-side copying and thus is discharged onto the discharge tray  117 . 
     In the image forming apparatus  100  having the above-described constitution, around the photosensitive member  104 , image forming process devices such as a developing device  201 , a cleaner portion  202  and a primary charger  203  are provided. Incidentally, the developing device  201  develops the electrostatic latent image formed on the photosensitive member  104  by the optical portion  103  on the basis of the image information of the original  101 , by depositing the developer on the electrostatic latent image. Further, the primary charger  203  electrically charges uniformly a photosensitive member surface in order to form a desired electrostatic latent image on the photosensitive member  104 . The cleaner portion  202  removes the developer remaining on the photosensitive member  104 . 
     (Developing Device) 
     Next, the developing device  201  will be described with reference to  FIGS. 1 and 2 . As shown in  FIGS. 1 and 2 , the developing device  201  includes a developer container  201   a , a developing roller  201   f , a stirring member  201   c  and feeding members  201   d  and  201   e . In the case of this embodiment, to the developing device  201 , the above-described one component magnetic toner is supplied as the developer from a developer supply device  20  in which a developer supply container  1  described later is mounted. The developer supplied to the developing device  201  is stirred by the stirring member  201   c  and is sent to the developing roller  201   f , and then is supplied to the photosensitive member  104  by the developing roller  201   f.    
     In the developing device  201 , a developing blade  201   g  for regulating a coat amount of the developer on the developing roller  201   f  is provided in contact with the developing roller  201   f  Further, in the developing device  201 , a leakage-preventing sheet  201   h  is provided in contact with the developing roller  201   f  in order to prevent leakage of the developer from between the developing roller  201   f  and the developing container  201   a.    
     In this embodiment, as the developer which should be supplied from the developer supply device  20 , the one component magnetic toner is used, but the developer is not limited thereto. For example, a two component developing device in which development is carried out using a two component developer in which a magnetic carrier and non-magnetic toner are mixed with each other may also be used, and in that case, as the developer, the non-magnetic toner is supplied. In this case, a constitution in which as the developer, not only the non-magnetic toner but also the magnetic carrier are supplied in combination may also be employed. 
     (Developer Supply Device) 
     Next, the developer supply device  20  will be described using part (a) of  FIG. 3  to  FIG. 4  while making reference to  FIG. 1 . The developer supply device  20  includes, as shown in  FIG. 1 , a mounting portion  10  in which the developer supply container  1  is mountable and from which the developer supply container  1  is dismountable and a hopper  10   a  for temporarily storing the developer discharged from the developer supply container  1 . The mounting portion  10  is a cylindrical member, in which a space for permitting accommodation of the developer supply container  1  is formed. The developer supply container  1  has a constitution in which the developer supply container  1  is inserted into the mounting portion  10  in an arrow M direction as shown in part (b) of  FIG. 3 . A rotational axis direction of the developer supply container  1  substantially coincides with an insertion direction in a state in which an accommodating portion  2  is not inclined. Incidentally, a dismounting direction (removing direction) of the developer supply container  1  from the mounting portion  10  is an opposite direction to the insertion direction (arrow M direction). 
     The mounting portion  10  is, as shown in part (a) of  FIG. 3 , provided with a rotational direction limiting portion  11  for limiting movement of a flange portion  4  (part (a) of  FIG. 5  described later) of the developer supply container  1  in a rotational direction by contact of the rotational direction pressure limiting portion  11  with the flange portion  4 . 
     The mounting portion  10  is provided with a developer receiving opening  13  for receiving the developer discharged from the developer supply container  1  by establishing communication with a discharge opening  4   a  of the developer supply container  1 . Then, the developer discharged through the discharge opening  4   a  of the developer supply container  1  is supplied to the hopper  10   a  through the developer receiving opening  13 . The hopper  10   a  includes a feeding screw  10   b  for feeding the developer toward the developing device  201 , an opening  10   c  communicating with the developer device  201  and a developer sensor  10   d  for detecting an amount of the developer accommodated in the hopper  10   a . The developer discharged from the developer supply container  1  is supplied to the developing device  201  by the hopper  10   a.    
     Further, the mounting portion  10  includes a driving gear  300  functioning as a driving mechanism as shown in parts (a) and (b) of  FIG. 3 . To the driving gear  300 , a rotational driving force is transmitted from a driving motor  500  ( FIG. 4 ) via a gear train, and the driving gear  300  has a function of imparting the rotational driving force to a gear portion  2   d  ( FIG. 4 ) of the developer supply container  1  in a state in which the developer supply container  1  is set in the mounting portion  10 . 
     As shown in  FIG. 4 , the driving motor  500  is controlled by a control device  600  including a CPU (central processing unit), ROM (read only memory), RAM (random access memory) and the like. In the case of this embodiment, the control device  600  controls an operation of the driving motor  500  on the basis of developer remaining amount information inputted from the developer sensor  10   d . Incidentally, in the case of the two component developing device, in place of the developer sensor  10   d , a magnetic sensor for detecting a toner content in the developer is provided in the developing device  201 , and on the basis of a detection result of this magnetic sensor, the operation of the driving motor  500  may only be required to be controlled by the control device  600 . 
     (Developer Supply Container) 
     Next, the developer supply container  1  according to First Embodiment will be described with reference to part (a) of  FIG. 5  to  FIG. 8 . The developer supply container  1  includes the accommodating portion  2  which is formed in a hollow cylindrical shape and which is provided with an inside space for permitting accommodation of the developer, and includes the flange portion  4 , a feeding member  6  and a pump portion  3   a . The accommodating portion  2  is mounted to the flange portion  4  so as to be rotatable relative to the flange portion  4  by being inserted and clearance-fitted in the flange portion  4  as a discharging portion. Further, although illustration is omitted, in the case where the developer supply container  1  is mounted in the developer supply device  20 , an upstream side of the accommodating portion  2  with respect to the insertion direction is placed on the mounting portion  10  (part (a) of  FIG. 3 ) so as to be supported from a lower portion with respect to a direction of gravitation. Therefore, the accommodating portion  2  is capable of rotating in a state in which the accommodating portion  2  is inserted relative to the flange portion  4 . Incidentally, herein, in the case where “upstream” and “downstream” are mentioned unless otherwise specified, “upstream” and “downstream” refer to those with respect to the insertion direction of the accommodating portion  2 , respectively. 
     (Accommodating Portion) 
     As shown in part (a) of  FIG. 5 , on an inner surface of the accommodating portion  2 , a feeding projection  2   a  which is helically projected is provided. The feeding projection  2   a  functions as a mechanism for feeding the accommodated developer toward a discharging chamber  4   c  side (part (b) of  FIG. 5 ) of the flange portion  4  with rotation of the feeding projection  2   a  itself. Further, as shown in  FIG. 6 , at an outer periphery of the accommodating portion  2 , the gear portion  2   d  engageable with the driving gear  300  (part (a) of  FIG. 3 ) of the mounting portion  10  is provided. The gear portion  2   d  receives a driving force from the driving gear  300  engaging with the gear portion  2   d . The gear portion  2   d  has a constitution in which the gear portion  2   d  is rotatable integrally with the accommodating portion  2 . For that reason, by rotation of the accommodating portion  2  rotating with rotation of the gear portion  2   d , the developer in the accommodating portion  2  is fed in a feeding direction (arrow X direction) by the feeding projection  2   a . Incidentally, the rotational driving force inputted from the driving gear  300  to the gear portion  2   d  is also transmitted to the pump portion  3   a  through a reciprocating member  3   b  (parts (a) and (b) of  FIG. 8 ). The pump portion  3   a  operates so that an internal pressure of the accommodating portion  2  is alternately switched repetitively between a state in which the internal pressure is lower than ambient pressure and a state in which the internal pressure is higher than the ambient pressure by the driving force received by the gear portion  2   d.    
     As shown in  FIG. 6 , at one end of the accommodating portion  2  on a downstream side (with respect to the insertion direction), a small diameter cylindrical portion  2   e  provided, as one end portion, with an opening  50  for permitting discharge of the developer toward the discharging chamber (discharging portion)  4   c  is formed. On an outer peripheral surface of the small diameter cylindrical portion  2   e , a ring-shaped circular rib  51  (projected portion) projecting toward an outside of the accommodating portion  2  in a radial direction crossing a rotational axis direction of the accommodating portion  2  is provided. In this embodiment, the small diameter cylindrical portion  2   e  is extended to a side downstream of the circular rib  51  with respect to the insertion direction of the developer supply container  1  (hereinafter, this extended portion is referred to as a projected annular portion  52  for convenience). 
     (Flange Portion) 
     The flange portion  4  is provided, as shown in part (b) of  FIG. 5 , with the hollow discharging chamber  4   c  for temporarily storing and then discharging the developer which is fed in the accommodating portion  2  toward the operation opening  50  side and which is supplied through the opening  50 . The discharging chamber  4   c  is provided with the discharge opening  4   a  at the bottom thereof. The discharge opening  4   a  is a small hole provided in a range of 0.05-5 mm in diameter. Incidentally, the shape of the discharge opening  4   a  is not limited to a circular shape, but may also be any shape having an opening area equal to an opening area of the discharge opening  4   a  having the above-described diameter. The developer inside the discharging chamber (discharging portion)  4   c  passes through a discharge path establishing communication between the discharging chamber  4   c  and the discharge opening  4   a  and is discharged to an outside of the developer supply container  1  through the discharge opening  4   a . At a periphery of the discharge opening  4   a , an opening seal which is perforated is provided. The developer supply container  1  is provided with a shutter  8  at the bottom of the discharging chamber  4   c  so as to sandwich the opening seal between the shutter  8  and the discharging chamber  4   c . The shutter  8  is configured so as to close the discharge opening  4   a  in a state in which the developer supply container  1  is not mounted in the developer supply device  20  and so as to open the discharge opening  4   a  in a state in which the developer supply container  1  is mounted in the developer supply device  20 . That is, the shutter  8  is capable of opening and closing the discharge opening  4   a  with a mounting and dismounting operation of the developer supply container  1  relative to the developer supply device  20 . 
     The flange portion  4  is substantially non-rotatable in response to mounting of the developer supply container  1  in the mounting portion  10 . Specifically, in order to prevent the flange portion  4  itself from rotating in the rotational direction of the accommodating portion  2 , the above-described rotational direction limiting portion  11  is provided (part (a) of  FIG. 3 ). Accordingly, in the state in which the developer supply container  1  is mounted in the mounting portion  10 , the discharging chamber  4   c  of the flange portion  4  is also in a state in which rotation thereof in the rotational direction of the accommodating portion  2  is substantially prevented (but movement thereto to the extent of play is permitted). On the other hand, the accommodating portion  2  is rotatable in a developer supplying step without being subjected to limitation of rotation in the rotational direction thereof. 
     As shown in  FIG. 7 , to the flange portion  4 , the pump portion  3   a  is mounted. The flange portion  4  is configured so that the accommodating portion  2  is mountable on a side opposite from the pump portion  3   a . Specifically, in the order from an upstream side of the discharging chamber  4   c , as portions-to-be-inserted, an upstream cylindrical portion  40  and a downstream cylindrical portion  42  which are provided for permitting mounting of the accommodating portion  2  through clearance fitting are formed. The upstream cylindrical portion  40  is provided with a plurality (four in this embodiment) of locking claws  41 , each projecting from an inner peripheral surface toward an inside with respect to a radial direction, along a circumferential direction (the rotational direction of the accommodating portion  2 ). The locking claw  41  is provided so as to be retractable by being elastically deformed when the accommodating portion  2  is mounted. The upstream cylindrical portion  40  is provided with holes  70  on a side downstream of the locking claws  41  so that the locking claws  41  are elastically deformed easily and so that the locking claws  41  are readily formed by injection molding. 
     On the other hand, the downstream cylindrical portion  42  is provided with a plurality (eight in this embodiment) of limiting ribs  43 , each projecting from an end surface thereof toward the accommodating portion  2  side, along the circumferential direction. In the case of this embodiment, the rollers ribs  43  as second limiting portions are disposed at a plurality of positions so as not to overlap with the locking claws  41  as seen in the insertion direction. Further, the limiting ribs  43  are provided with an interval (gap) from the locking claws  41  as first limiting portions with respect to the insertion direction. As described later, the circular rib  51  ( FIG. 6 ) of the accommodating portion  2  is positioned between the locking claws  41  and the limiting ribs  43 . Further, to the downstream cylindrical portion  42 , a ring-shaped seal member  60  formed of an elastic member such as urethane foam, for example, is bonded at an end surface thereof. The seal member  60  sets a periphery of the opening  50  (opening periphery) by being provided at a position inside the limiting ribs  43  with respect to the radial direction, specifically at a position where the above-described projected annular portion  52  ( FIG. 6 ) of the accommodating portion  2  abuts against the seal member  60 . As described later (part (a) of  FIG. 9 ), the accommodating portion  2  is mounted to the flange portion  4  so as to be rotatable relative to the flange portion  4  in a state in which the projected annular portion  52  elastically compresses the seal member  60 . The seal member  60  seals the gap between the small diameter cylindrical portion  2   e  and the downstream cylindrical portion  42 , and the accommodating portion  2  rotates while sliding with the seal member  60 , so that hermetically in the developer supply container  1  is maintained by the seal member  60 . 
     (Feeding Member) 
     Returning to part (b) of  FIG. 5 , in the accommodating portion  2  a plate-like feeding member  6  for feeding the developer, fed from the inside of the accommodating portion  2  by a helical feeding projection  2   a , toward the discharging chamber  4   c  of the flange portion  4  is provided. This feeding member  6  is provided so as to divide a part of a region of the accommodating portion  2  into substantially two portions and is configured to rotate together integrally with the accommodating portion  2 . Further, this feeding member  6  is provided with a plurality of inclined ribs  6   a  each inclined toward the discharging chamber  4   c  side with respect to the rotational axis direction of the accommodating portion  2  on each of opposite surfaces thereof. The developer fed by the feeding projection  2   a  is raised from below toward above with respect to a vertical direction by this plate-like feeding member  6  in interrelation with rotation of the accommodating portion  2 . Thereafter, with further rotation of the accommodating portion  2 , the developer is delivered toward the discharging chamber  4   c  by the inclined rib  6   a . In this constitution, this inclined rib  6   a  is provided on the opposite surfaces of the feeding member  6  so that the developer is sent to the discharging chamber  4   c  every half rotation of the accommodating portion  2 . 
     (Pump Portion) 
     In this embodiment, as described above, in order to stably discharge the developer through a small discharge opening  4   a , the above-described pump portion  3   a  is provided at a part of the developer supply container  1 . The pump portion  3   a  is a variable-volume pump in which a volume thereof is variable and which is made of a resin material. Specifically, as the pump portion  3   a , a pump comprising a bellows-like expansion and contraction member which is capable of expansion and contraction is employed. Specifically, a bellows-like pump is employed, and a plurality of “mountain-fold” portions and “valley-fold” portions are alternately formed periodically. 
     The developer supply container  1  is provided with a cam mechanism functioning as a drive conversion mechanism for converting a rotational driving force, for rotating the accommodating portion  2 , received by the gear portion  2   d  into a force in a direction in which the pump portion  3   a  is reciprocated. In this embodiment, a constitution in which by converting the rotational driving force received by the gear portion  2   d  into a reciprocating force on the developer supply container  1  side, a driving force for rotating the accommodating portion  2  and a driving force for reciprocating the pump portion  3   a  are received by a single drive-receiving portion (gear portion  2   d ) is employed. 
     Here, part (a) of  FIG. 8  is a partial view of the pump portion  3   a  in a state in which the pump portion  3   a  is expanded to the maximum in use, and part (b) of  FIG. 8  is a partial view of the pump portion  3   a  in a state in which the pump portion  3   a  is contracted to the maximum in use. As shown in parts (a) and (b) of  FIG. 8 , as an intervening member for converting the rotational driving force into the reciprocating force of the pump portion  3   a , a reciprocating member  3   b  is used. Specifically, the gear portion  2   a  receiving the rotational driving force from the driving gear  300  and a cam groove  2   b  provided with a groove extending through one full circumference are rotated. With this cam groove  2   b , a reciprocating member engaging projection  3   c  projected partly from the reciprocating member  3   b  engages. Further, a rotational direction of the reciprocating member  3   b  is limited by a protective cover  4   e  (part (b) of  FIG. 5 ) so that the reciprocating member  3   b  itself does not rotate in the rotational direction of the accommodating portion  2 . The reciprocating member  3   b  reciprocates along the groove of the cam groove  2   b  (in an arrow X direction or an opposite direction) by being limited in rotational direction thereof. That is, the cam groove  2   b  is rotated by the rotational driving force inputted from the driving gear  300 , so that the reciprocating member engaging projection  3   c  reciprocates in the arrow X direction or the opposite direction. Correspondingly, the pump portion  3   a  alternately repeats an expanded state (part (a) of  FIG. 8 ) and a contracted state (part (b) of  FIG. 8 ) and thus a volume of the developer supply container  1  is made variable. 
     By this expansion and contraction operation of the pump portion  3   a , a pressure in the developer supply container  1  is changed, and discharge of the developer is carried out by utilizing the pressure. Specifically, when the pump portion  3   a  is contracted, in side of the developer supply container  1  is in a pressed state, so that the developer is discharged through the discharge opening  4   a  in a manner such that the developer is pushed out by the pressure. Further, when the pump portion  3   a  is expanded, the inside of the developer supply container  1  is in a reduced pressure state, so that outside air is taken in from the outside of the developer supply container  1  through the discharge opening  4   a . The developer in the neighborhood of the discharge opening  4   a  is loosened by the outside air taken in through the discharge opening  4   a , so that subsequent discharge is smoothly carried out. The developer is discharged through the discharge opening  4   a  in accordance with a pressure difference between the inside pressure and the ambient pressure (outside pressure) of the developer supply container  1  generated by repetitive execution of the above-described expansion and contraction operation by the pump portion  3   a.    
     Incidentally, a discharging method of the developer from the developer supply container  1  is not limited to the expansion and contraction of the above-described pump portion  3   a . For example, the developer supply container  1  may also have a structure in which the developer supply container  1  is not provided with the pump portion and the diameter of the discharge opening  4   a  is made larger than an opening area and in which the developer deposited on the discharging chamber (discharging portion)  4   c  is discharged by gravitation. Further, the developer supply container  1  may also have a constitution in which the pump portion is not provided and the developer is sent to a discharging path by a rotatable member  6  provided just above an inlet of the discharging path. 
     (Material of Developer Supply Container) 
     In this embodiment, as described above, the constitution in which the developer is discharged through the discharge opening  4   a  by changing the volume of the inside of the developer supply container  1  by the pump portion  3   a  is employed. Therefore, as a material of the developer supply container  1 , a material having rigidity to the extent that a resultant developer supply container is largely collapsed due to a volume changer or the developer supply container is not expanded may preferably be employed. In this embodiment, the developer supply container  1  communicates with the outside only through the discharge opening  4   a  during the discharge of the developer and thus has a constitution in which the developer supply container  1  is hermetically sealed from the outside except for the discharge opening  4   a , that is, a constitution in which the developer is discharged through the discharge opening  4   a  by decreasing and increasing the volume of the developer supply container  1  by the pump portion  3   a  is employed, and therefore, hermetically to the extent that a stable discharging performance is required. Therefore, in this embodiment, a material of the accommodating portion  2  is PET resin, a material of the flange portion  4  is polystyrene resin, and a material of the pump portion  3   a  is polypropylene resin. 
     Incidentally, as regards the materials used, when the materials of the accommodating portion  2  and the flange portion  4  are capable of withstanding the volume change, for example, it is possible to use other resin materials such as ABS (acrylonitrile-butadiene-styrene copolymer), polyester, polyethylene and polypropylene. As regards the material of the pump portion  3   a , the material may only be required that the material exhibits an expansion and contraction function and is capable of changing the volume of the developer supply container  1  by the volume change thereof. For example, the pump portion  3   a  may also be formed in a thin film of ABS, polystyrene, polyester, polyethylene or the like, or it is also possible to use a rubber or another material having expansion and contraction properties. 
     Next, a manner of mounting the above-described accommodating portion  2  and the flange portion  4  will be described with reference to parts (a) and (b) of  FIG. 9 . The accommodating portion  2  is rotatably clearance-fitted in the discharging chamber  4   c  of the flange portion  4  on one end side of the discharging chamber  4   c . In the case of this embodiment, the inner peripheral surface of the upstream cylindrical portion  40  and the outer peripheral surface of the circular rib  51  are in a clearance fitting relationship. By this constitution, a position of the small diameter cylindrical portion  2   e  relative to the flange portion  4  is determined. This is for the purpose of rotating the accommodating portion  2  smoothly even when concentric deviation between a radial center of the upstream cylindrical portion  40  and a radial center of the small diameter cylindrical portion  2   e  occurs due to component part variation or the like. 
     In a state in which the accommodating portion  2  is clearance-fitted in the flange portion  4 , movement of the accommodating portion  2  in the rotational axis direction is limited by the discharging chamber  4   c . As shown in parts (a) and (b) of  FIG. 9 , the circular rib  51  of the accommodating portion  2  is locked by the locking claws  41  formed inside the upstream cylindrical portion  40  of the discharging chamber  4   c . Then, the elastic seal member  60  provided on the end surface of the downstream cylindrical portion  42  of the discharging chamber  4   c  is pressed and compressed against the downstream cylindrical portion  42  by contact of a free end of the projected annular portion  52  (this fee end is referred to as a pressing portion  52   a  for convenience). During rotation of the accommodating portion  2 , the pressing portion  52   a  slides with the seal member  60 . Thus, the accommodating portion  2  is prevented from causing rotation runout by a seal repelling force generated by abutting and compressing the seal member  60  against the downstream cylindrical portion  42 . Movement of the accommodating portion  2  in a direction opposite to the insertion direction by the seal repelling force is limited by the locking claws  41 . 
     Incidentally, in the case of this embodiment, with respect to the insertion direction, a difference (T in part (b) of  FIG. 9 ) between a length (L 1  in the figure) from a free end surface  41   a  of the locking claw  41  to a limiting surface  43   a  of the limiting rib  43  and a thickness (L 2  in the figure) of the circular rib  51  is set at a range of “0.25±0.15 mm”, for example. That is, in a state in which the accommodating portion  2  is not inclined relative to the discharging chamber  4   c , a movable length of the accommodating portion  2  in the insertion direction is set at 0.1 mm or more and 0.4 mm or less. In other words, the limiting ribs  43  have the gap with the circular rib  51  with respect to the insertion direction in a state in which the limiting ribs  43  does not limit inclination of the accommodating portion  2 , and the gap is set at 0.1 mm or more and 0.4 mm or less. Further, in the state in which the accommodating portion  2  is not inclined, the accommodating portion  2  is locked by the locking claws  41  so that the thickness thereof (E 1  in the figure) after compression is, for example, “2 mm” relative to the thickness thereof (E 0  in the figure), after the compression, which is “3 mm”. 
     Next, limitation of movement of the accommodating portion  2  in the radial direction during rotation will be described with reference to  FIG. 10 . As shown in  FIG. 10 , the accommodating portion  2  is rotated by transmission of the rotational drive (rotatable driving force) from the driving gear  300  to the gear portion  2   d  provided at the outer periphery of the accommodating portion  2 . When the accommodating portion  2  is rotated, in the accommodating portion  2 , a radial load is capable of generating in the radial direction (specifically an arrow F direction in  FIG. 10 ) due to a rotational load by the driving gear  300 . An upstream side of the accommodating portion  2  is mounted in the mounting portion  10 , and therefore, when the radial load generates, the accommodating portion  2  is inclined in the arrow F direction in  FIG. 10  relative to the discharging chamber  43  by the influence thereof, so that the rotation runout can occur not a little. The rotational load of the accommodating portion  2  is not constant but fluctuates, and therefore, a degree of the rotation runout is also not constant. Incidentally, herein, the state in which the accommodating portion  2  is inclined relative to the discharging chamber  4   c  refers to a state in which a rectilinear line R passing through a radial center of the downstream cylindrical portion  42  (and the upstream cylindrical portion  40 ) and a rotational axis R′ of the accommodating portion  2  cross each other. On the other hand, a state in which the accommodating portion  2  is not inclined relative to the discharging chamber  4   c  refers to a state in which the above-described rectilinear line R and the rotational axis R′ are parallel to each other (do not cross each other). 
     In the case of this embodiment, when the radial load is generated by the driving gear  300 , while the circular rib  51  of the accommodating portion  2  is kept in a locked state by the locking claws  41  on the driving gear  300  side, the accommodating portion  2  is inclined while being rotated. On the other hand, on an opposite side where the accommodating portion  2  is rotated (moved) 180° from the driving gear  300  in the circumferential direction thereof, the circular rib  51  abuts and contacts the limiting surfaces  43   a  of the limiting ribs  43 . When the accommodating portion  2  is inclined, the pressure applied to the seal member  60  by the pressing portion  52   a  is different between the driving gear  300  side and the opposite side from the driving gear  300  side. A difference, in pressure applied to the seal member  60  by the pressing portion  52   a , between the driving gear  300  side and the opposite side from the driving gear  300  side increases with an increasing degree of the inclination of the accommodating portion  2 . 
     In the case of this embodiment, the inclination of the accommodating portion  2  is suppressed by the circular rib  51  and the locking claws  41  on the driving gear  300  side and is suppressed by the circular rib  51  and the limiting ribs  43  on the opposite side from the driving gear  300  side. Thus, an inclination of the rotational axis R′ of the accommodating portion  2  relative to the rectilinear line R passing through the radial center of the downstream cylindrical portion  42  can be limited to within a predetermined range. As a result, even when the accommodating portion  2  is inclined, the inclination of the accommodating portion  2  does not fluctuate during rotation, so that the pressure applied to the seal member  60  does not largely fluctuate. That is, the seal member  60  cannot be largely deformed locally. 
     Here, in this embodiment (“FIRST EMB.”) and a conventional example (“CONV. EX.”), a comparison result of thicknesses of the seal members  60  in the case where the accommodating portions  2  are rotated in the inclined state is shown in  FIG. 11 . In the conventional example, compared with this embodiment, a constitution in which the flange portion  4  is not provided with the limiting ribs  43  is employed. Incidentally, in  FIG. 11 , the ordinate represents one rotation (cyclic) period of the accommodating portion  2 , and the abscissa represents only a seal thickness of the seal member  60  at an arbitrary seal contact position, i.e., a position of the pressing portion  52   a  on the basis of the end surface of the downstream cylindrical portion  42  as a reference position. 
     As can be understood from  FIG. 11 , when the accommodating portion  2  causes the rotation runout, every rotation of the accommodating portion  2 , the pressing portion  52   a  repeats displacement in a direction of compressing the seal member  60  while being slightly deviated in the radial direction from a desired seal contact position E 1 . For this reason, the seal member  60  repeats excessive compression in a compression amount which is a desired compression amount or more. The excessive compression amount was represented by E in  FIG. 11 . In this embodiment, compared with the conventional example, the excessive compression amount was able to be suppressed to 30%. That is, it was possible to suppress the deformation of the seal member  60  due to the rotation of the accommodating portion  2  in the inclined state relative to the discharging chamber  4   c.    
     As described above, according to this embodiment, in the case where the accommodating portion  2  is rotated by the driving gear  300  in the inclined state, the circular rib  51  of the accommodating portion  2  contacts the locking claws  41  on the driving gear  300  side and contacts the limiting ribs  43  on the opposite side from the driving gear  300  side, and thus suppresses the inclination of the accommodating portion  2 . As a result, the pressure applied to the seal member  60  in the rotational axis direction cannot fluctuate largely, so that the seal member  60  cannot be largely deformed locally. Thus, in this embodiment, while suppressing the rotation runout of the accommodating portion  2  by the seal member  60 , deformation of the seal member  60  due to the rotation of the accommodating portion  2  in the inclined state relative to the discharging chamber  4   c  can be suppressed by a simple constitution. 
     Second Embodiment 
     A developer supply container of Second Embodiment will be described with reference to  FIG. 12  to part (b) of  FIG. 13 . The developer supply container of Second Embodiment includes an accommodating portion  210  which is formed in a hollow cylindrical shape and which accommodates the developer therein, and includes a flange portion  410 . Also in Second Embodiment, the above-described feeding member  6  and the above-described pump portion  3   a  are provided, but these are similar to those in the above-described First Embodiment, and therefore will be omitted from description. Further, constituent elements which are the same as those in the above-described First Embodiment will be omitted from description or briefly described by adding the same reference numerals or symbols thereto. 
     (Flange Portion) 
     The flange portion  410  will be described. The flange portion  410  shown in  FIG. 12  includes, in place of the limiting ribs  43 , a plurality of opposing limiting portions  44  which project from the end surface of the downstream cylindrical portion  42  toward the accommodating portion  210  (part (a) of  FIG. 13 ) side and which extend along the circumferential direction of the flange portion  410  when compared with the above-described flange portion  4  of  FIG. 7 . Each of the opposing limiting portions  44  is provided opposed to the associated locking claw  41  with an interval (gap) from the locking claw  41  with respect to the rotational axis direction so as to overlap with the locking claw  41  as seen in the insertion direction. As regards the opposing limiting portions  44  and the locking claws  41 , one or a plurality of these members may only be required to be disposed so as to partially overlap with each other of the plurality of these members. Further, in the case of this embodiment, between the locking claw  41  and the opposing limiting portion  44 , as described later, the circular rib  51  and a downstream circular rib  53  (part (a) of  FIG. 13 ) are positioned. The opposing limiting portion  44  is formed simultaneously with a free end surface  41   a  (part (b) of  FIG. 13 ) of the locking claw  41  on the basis of the same metal mold when the flange portion  410  is prepared by injection molding, and therefore, an occurrence of a variation in gap with the locking claw  41  is readily suppressed. Incidentally, this embodiment is not limited to formation of the opposing limiting portions  44  in place of the limiting ribs  43 , but both the limiting ribs  43  and the opposing limiting portions  44  may also be formed. However, in that case, there is a need that the limiting ribs  43  are disposed at the same positions as those of the opposing limiting portions  44  with respect to the rotational axis direction and that the gap between the limiting rib  43  and the locking claw  41  is made substantially coincide with the gap between the opposing limiting portion  44  and the locking claw  41 . 
     (Accommodating Portion) 
     The accommodating portion  210  will be described. As shown in parts (a) and (b) of  FIG. 13 , on the outer peripheral surface of the small diameter cylindrical portion  2   e , in addition to the ring-shaped circular rib  51  projecting toward the outside of the accommodating portion  210  in the radial direction crossing the rotational axis direction of the accommodating portion  210 , a ring-shaped downstream circular rib  53  is provided on a side downstream of the circular rib  51 . The downstream circular rib  53  as a second portion is provided downstream of the circular rib  51  as a first portion with a gap from the circular rib  51 , and an outer diameter thereof is smaller than an outer diameter of the circular rib  51 . 
     Incidentally, in the case of this embodiment, with respect to the rotational axis direction, a difference (T in part (b) of  FIG. 13 ) between a length (L 1  in the figure) from a free end surface  41   a  of the locking claw  41  to a limiting surface  44   a  of the opposing limiting portion  44  and a length (L 2  in the figure) from the free end surface  41   a  to a downstream end surface of the downstream circular rib  53  is set within a predetermined range. The predetermined range is “0.25±0.15 mm”, for example. In other words, in a state in which the accommodating portion  210  is not inclined relative to the discharging chamber  4   c , a movable length of the accommodating portion  210  in the rotational axis direction is set at 0.1 mm or more and 0.4 mm or less. 
     The accommodating portion  210  is clearance-fitted rotatably on one end side of the discharging chamber  4   c . In a state in which the accommodating portion  210  is clearance-fitted, as shown in part (a) and (b) of  FIG. 13 , the circular rib  51  of the accommodating portion  210  is locked by the locking claws  41 . Movement of the accommodating portion  210  in the rotational axis direction (specifically an opposite direction to the insertion direction) by the seal repelling force is limited by the locking claws  41 . 
     In the case of this embodiment, when the radial load F is generated by the driving gear  300  ( FIG. 10 ), while the circular rib  51  is kept in a locked state by the locking claws  41 , the accommodating portion  210  is inclined while being rotated. Then, on the driving gear  300  side, the downstream circular rib  53  moves so as to be separated from the limiting surfaces  44   a  of the opposing limiting portions  44 . On the other hand, on an opposite side where the accommodating portion  210  is rotated (moved) 180° from the driving gear  300  in the circumferential direction thereof, the downstream circular rib  53  abuts and contacts the limiting surfaces  44   a  of the opposing limiting portions  44 . When the accommodating portion  210  is inclined, the pressure applied to the seal member  60  by the pressing portion  52   a  is different between the driving gear  300  side and the opposite side from the driving gear  300  side. 
     As described above, in the case of this embodiment, the inclination of the accommodating portion  210  is suppressed by the circular rib  51  and the locking claws  41  on the driving gear  300  side and is suppressed by the downstream circular rib  53  and the opposing limiting portions  44  on the opposite side from the driving gear  300  side. As a result, even when the accommodating portion  210  is inclined, the pressure applied to the seal member  60  with respect to the rotational axis direction does not largely fluctuate. 
     Therefore, the pressure applied to the seal member  60  in the rotational axis direction does not fluctuate largely with respect to the circumferential direction, so that the seal member  60  cannot be largely deformed locally. Accordingly, also by this embodiment, an effect such that while suppressing the rotation runout of the accommodating portion  210  by the seal member  60 , deformation of the seal member  60  due to the rotation of the accommodating portion  210  in the inclined state relative to the discharging chamber  4   c  can be suppressed by a simple constitution is achieved. 
     Third Embodiment 
     A developer supply container of Third Embodiment will be described with reference to  FIG. 14  to part (b) of  FIG. 16 . The developer supply container of Third Embodiment includes an accommodating portion  220  which is formed in a hollow cylindrical shape and which accommodates the developer therein, and includes a flange portion  420 . Also in Third Embodiment, the above-described feeding member  6  and the above-described pump portion  3   a  are provided, but these are similar to those in the above-described First Embodiment, and therefore will be omitted from description. Further, constituent elements which are the same as those in the above-described First Embodiment will be omitted from description or briefly described by adding the same reference numerals or symbols thereto. 
     (Accommodating Portion) 
     The accommodating portion  220  will be described. As shown in  FIG. 14 , at one end portion of the accommodating portion  220  on a downstream side, the small diameter cylindrical portion  2   e  provided with the opening  50  for permitting discharge of the developer is formed. On a free end side of the small diameter cylindrical portion  2   e , the ring-shaped circular rib  51  projecting outward in the radial direction is provided. However, this embodiment is different from the above-described First Embodiment, the small diameter cylindrical portion  2   e  is not extended to the side downstream of the circular rib  51  (i.e., the projected annular portion  52  is not formed). Instead, a free end cylindrical portion  511  as a projection is formed so as to extend from the end surface of the circular rib  51  toward a downstream side. The free end cylindrical portion  511  is formed so that an inner diameter thereof is larger than the outer diameter of the small diameter cylindrical portion  2   e  and is smaller than the outer diameter of the circular rib  51 . In the case of this embodiment, the seal member  60  is bonded to the circular rib  51  so as to extend along an inner periphery of the free end cylindrical portion  511 . 
     (Flange Portion) 
     The flange portion  420  will be described. The flange portion  420  shown in  FIG. 15  is not provided with the limiting ribs  43  when compared with the above-described flange portion  4  of  FIG. 7 . Further, the downstream cylindrical portion  42  is provided with a ring-shaped seal abutment portion  45  for compressing and sandwiching the seal member  60  between itself and the circular rib  51 . The ring-shaped seal abutment portion  45  is, as shown in parts (a) and (b) of  FIG. 16 , provided so as to project from the end surface  42   a  of the downstream cylindrical portion  42  in the opposite direction to the insertion direction. Further, in the case of this embodiment, the downstream cylindrical portion  42  is provided with an intermediary cylindrical portion  46  provided so as to project from the end surface  42   a  of the downstream cylindrical portion  42  in the opposite direction to the insertion direction so that the free end cylindrical portion  511  is loosely engaged between the intermediary cylindrical portion  46  and the seal abutment portion  45  with respect to the radial direction. The intermediary cylindrical portion is formed so that an inner diameter thereof is larger than an outer diameter of the seal abutment portion  45 . 
     The accommodating portion  220  is clearance-fitted rotatably in the discharging chamber  4   c  of the flange portion  420  on one end side thereof. In the case of this embodiment, as shown in parts (a) and (b) of  FIG. 16 , movement of the accommodating portion  220  in the rotational axis direction is limited by locking of the circular rib  51  by the locking claws  41  in a state in which the accommodating portion  220  is clearance-fitted in the discharging chamber  4   c . In that state, the seal member  60  is compressed by being sandwiched between the circular rib  51  and the seal abutment portion  45 , and thus seals a space between the downstream cylindrical portion  42  (the seal abutment portion  45  and the intermediary cylindrical portion  46 ) and the free end cylindrical portion  511 . During rotation of the accommodating portion  220 , the seal abutment portion  45  is slid by the seal member  60 . Thus, by the seal repelling force generated by pressing and compressing the seal member  60  in the insertion direction, the accommodating portion  220  is prevented from causing the rotation runout. Further, the free end cylindrical portion  511  is loosely engaged between the intermediary cylindrical portion  46  and the seal abutment portion  45  with respect to the radial direction. That is, the downstream cylindrical portion  42 , the seal abutment portion  45  and the intermediary cylindrical portion  46  form a recessed portion where the free end cylindrical portion  511  is capable of entering. 
     Incidentally, in the case of this embodiment, with respect to the rotational axis direction, a difference (T in part (b) of  FIG. 16 ) between a length (L 1  in the figure) from a free end surface  41   a  of the locking claw  41  to the end surface  42   a  of the downstream cylindrical portion  42  and a length (L 2  in the figure) from the free end surface  41   a  to the end portion free end cylindrical portion  511  of the is set at a range of “0.25±0.15 mm”, for example. In other words, in a state in which the accommodating portion  220  is not inclined relative to the discharging chamber  4   c , a movable length of the accommodating portion  220  in the rotational axis direction is set at 0.1 mm or more and 0.4 mm or less. 
     In the case of this embodiment, when the radial load F is generated by the driving gear  300  ( FIG. 10 ), while the circular rib  51  is kept in a locked state by the locking claws  41 , the accommodating portion  210  is inclined while being rotated. Then, on the driving gear  300  side, and on an opposite side where the accommodating portion  220  is rotated (moved) 180° from the driving gear  300  in the circumferential direction thereof, the free end cylindrical portion  511  is contacted to and sandwiched between the intermediary cylindrical portion  46  and the seal abutment portion  45 . When the accommodating portion  220  is inclined, the pressure applied to the seal member  60  by the pressing portion  52   a  is different between the driving gear  300  side and the opposite side from the driving gear  300  side. 
     As described above, in the case of this embodiment, the inclination of the accommodating portion  220  is suppressed by the free end cylindrical portion  511 , the intermediary cylindrical portion  46  and the seal abutment portion  45 . As a result, even when the accommodating portion  220  is inclined, the pressure applied to the seal member  60  with respect to the rotational axis direction does not largely fluctuate. 
     Therefore, the pressure applied to the seal member  60  in the rotational axis direction does not fluctuate largely with respect to the circumferential direction, so that the seal member  60  cannot be largely deformed locally. Accordingly, also by this embodiment, an effect such that while suppressing the rotation runout of the accommodating portion  220  by the seal member  60 , deformation of the seal member  60  due to the rotation of the accommodating portion  220  in the inclined state relative to the discharging chamber  4   c  can be suppressed by a simple constitution is achieved. 
     Fourth Embodiment 
     A developer supply container of Fourth Embodiment will be described with reference to  FIG. 17  to part (b) of  FIG. 18 . The developer supply container of Fourth Embodiment includes an accommodating portion  230  which is formed in a hollow cylindrical shape and which accommodates the developer therein, and includes a flange portion  430 . When compared with the above-described First to Third Embodiments, this embodiment is largely different from the above-described First to Third Embodiments in that after the accommodating portion  230  is inserted into the flange portion  430 , positional limiting members  61  each provided with locking claws  62  are made mountable o the flange portion  430  (post-mounting). Also in Fourth Embodiment, the above-described feeding member  6  and the above-described pump portion  3   a  are provided, but these are similar to those in the above-described First Embodiment, and therefore will be omitted from description. Further, constituent elements which are the same as those in the above-described First Embodiment will be omitted from description or briefly described by adding the same reference numerals or symbols thereto. 
     (Flange Portion) 
     The flange portion  430  will be described. The flange portion  430  shown in  FIG. 17  does not include the limiting ribs  43 , and from which the locking claws  62  are dismountable. That is, the discharging chamber  4   c  is provided with the upstream cylindrical portion  40  and the downstream cylindrical portion  42  which are used for permitting mounting of the accommodating portion  230  through clearance fitting, and the upstream cylindrical portion  40  is provided with a plurality of slits  47  (four slits in this embodiment) in an outer peripheral surface thereof along a circumferential direction. Each of the slits  47  is provided with a plurality of communication holes  48  (two holes in this embodiment) establishing communication between an inside and an outside of the upstream cylindrical portion  40 . Each slit  47  is configured so that the positional limiting member  61  is mountable in and dismountable from the slit  47  after the accommodating portion  230  is inserted into the flange portion  430 . The positional limiting member  61  as a limiting portion is provided with a plurality of locking claws  62  (two locking claws in this embodiment) at positions corresponding to the communication holes  48  so that each of the locking claws  62  projects from the inner peripheral surface of the upstream cylindrical portion  40  toward the inside with respect to the radial direction through the communication hole  48  in a state in which the positional limiting member  61  is mounted on the slit  47 . On the other hand, to an end surface of the downstream cylindrical portion  42 , the seal member  60  is bonded. The seal member  60  is provided at a position where the small diameter cylindrical portion  2   e  of the accommodating portion  230  abuts against the seal member  60 . 
     (Accommodating Portion) 
     On the other hand, as shown in  FIG. 17 , at one end of the accommodating portion  230  on a downstream side, the small diameter cylindrical portion  2   e  as one end portion is formed. On an outer peripheral surface of the small diameter cylindrical portion  2   e , a ring-shaped circular rib  51  and an upstream circular rib  54  positioned upstream of the circular rib  51 , which project toward an outside of the small diameter cylindrical portion  2   e  in the radial direction are provided. In the case of this embodiment, the projected annular portion  52  ( FIG. 6 ) is not formed. 
     In this embodiment, in a state in which the positional limiting members  61  are mounted in the slits  47 , as shown in part (a) and (b) of  FIG. 18 , each of the locking claws  62  enters between the circular rib  51  as a second projected portion and the upstream circular rib  54  as a first projected portion. The circular rib  51  is locked by the locking claw  62 . That is, movement of the accommodating portion  230  in the rotational axis direction is limited by locking the circular rib  51  by the locking claw  62  in a state in which the accommodating portion  230  is clearance-fitted in the discharging chamber  4   c . Then, the seal member  60  is compressed by being pressed against the downstream cylindrical portion  42  by the end surface of the small diameter cylindrical portion  2   e . During rotation of the accommodating portion  230 , the small diameter cylindrical portion  2   e  slides on the seal member  60 . Thus, by the seal repelling force generated by compressing the photosensitive member  104  in the insertion direction through pressing, the accommodating portion  230  is prevented from causing rotation runout. 
     In the case of this embodiment, when the radial load F is generated by the driving gear  300  ( FIG. 10 ), while the circular rib  51  is kept in a locked state by the locking claws  41 , the accommodating portion  230  is inclined while being rotated. Then, on the driving gear  300  side, the upstream circular rib  54  moves so as to be separated from the locking claws  62 . On the other hand, on an opposite side where the accommodating portion  230  is rotated (moved) 180° from the driving gear  300  in the circumferential direction thereof, the upstream circular rib  54  abuts and contacts the locking claws  62 . 
     Incidentally, in the case of this embodiment, with respect to the insertion direction, a difference (T in part (b) of  FIG. 18 ) between a length (L 1  in the figure) from a locking surface  62   a  of the locking claw  62  to a surface-to-be-locked  54   a  of the upstream circular rib  54  and a thickness (L 2  in the figure) of the locking claw  62  is set at a range of “0.25±0.15 mm”, for example. In other words, in a state in which the accommodating portion  230  is not inclined relative to the discharging chamber  4   c , a movable length of the accommodating portion  230  in the rotational axis direction is set at 0.1 mm or more and 0.4 mm or less. 
     As described above, in the case of this embodiment, the accommodating portion  230  is configured so that the inclination of the accommodating portion  230  is suppressed by the circular rib  51  and the locking claws  62  on the driving gear  300  side and is suppressed by the upstream circular rib  54  and the locking claws  62  on the opposite side from the driving gear  300  side. As a result, even when the accommodating portion  230  is inclined, the pressure applied to the seal member  60  with respect to the rotational axis direction does not largely fluctuate. 
     Accordingly, the pressure applied to the seal member  60  in the rotational axis direction does not fluctuate largely with respect to the circumferential direction, so that the seal member  60  cannot be largely deformed locally. Accordingly, also by this embodiment, an effect such that while suppressing the rotation runout of the accommodating portion  230  by the seal member  60 , deformation of the seal member  60  due to the rotation of the accommodating portion  230  in the inclined state relative to the discharging chamber  4   c  can be suppressed by a simple constitution is achieved. 
     Other Embodiments 
     Incidentally, the developer supply container  1  of this embodiment may also be a developer supply container  1  in which the pump portion  3   a  is not provided. In this case, constituent elements other than the pump portion  3   a  may also be similar to those in the above-described embodiments. As regards the feeding of the developer in the developer supply container  1 , a constitution in which the developer is fed toward the discharging chamber  4   c  by the accommodating portion  2  ( 210 ,  220 ,  230 ) and the feeding member  6  may also be employed. 
     According to the present invention, while suppressing the rotation runout of the accommodating portion by the seal member, deformation of the seal member due to rotation of the accommodating portion in the state in which the accommodating portion is inclined relative to the discharging portion can be suppressed by a simple constitution. 
     While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the following claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions. 
     This application claims the benefit of Japanese Patent Application No. 2018-162135 filed on Aug. 30, 2018, which is hereby incorporated by reference herein in its entirety.