Patent Publication Number: US-11656570-B2

Title: Image forming apparatus

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of U.S. patent application Ser. No. 16/907,465, filed Jun. 22, 2020, now U.S. Pat. No. 11,144,004, which is a continuation of U.S. patent application Ser. No. 16/459,726, filed Jul. 2, 2019, now U.S. Pat. No. 10,725,423; which claims priority from Japanese Patent Application No. 2018-129805, filed on Jul. 9, 2018. The entire subject matter of the aforementioned applications are incorporated herein by reference. 
    
    
     TECHNICAL FIELD 
     The disclosure relates to an image forming apparatus. 
     BACKGROUND 
     There has been proposed an image forming apparatus includes an apparatus main body, a drawer configured to be movable between an inner position located inside the apparatus main body and an outer position located outside the apparatus main body, a plurality of cartridges supported to the drawer, and a waste toner box. Each of the plurality of cartridges includes a photosensitive drum, and a drum cleaning unit configured to remove waste toner from the photosensitive drum. The drawer includes a collective conveying unit configured to collect the waste toner from the plurality of drum cleaning units and to convey the same to the waste toner box. 
     SUMMARY 
     Illustrative aspects of the disclosure provide an image forming apparatus capable of securing smooth movement of a drawer while accommodating waste toner from a plurality of photosensitive drums into a waste toner box. 
     One illustrative aspect of the disclosure may provide an image forming apparatus comprising: an apparatus main body having an opening; a drawer movable between: an inner position where the drawer is located inside the apparatus main body; and an outer position where the drawer is located outside the apparatus main body through the opening; a first cartridge supported by the drawer, the first cartridge comprising: a first photosensitive drum; and a first discharge part configured to discharge waste toner removed from the first photosensitive drum; a second cartridge supported by the drawer, the second cartridge comprising: a second photosensitive drum; and a second discharge part configured to discharge waste toner removed from the second photosensitive drum; and a waste toner box comprising: a first coupling part configured to be coupled with the first discharge part; and a second coupling part configured to be coupled with the second discharge part, in a state where the first cartridge and the second cartridge are supported by the drawer located at the inner position and the waste toner box is mounted to the apparatus main body, the waste toner box being movable between: a first position where the first coupling part and the first discharge part are coupled and the second coupling part and the second discharge part are coupled; and a second position where the first coupling part and the first discharge part are decoupled and the second coupling part and the second discharge part are decoupled. 
     According to the disclosure, in a state where the waste toner box is located at the first position, the first coupling part can receive the waste toner from the first discharge part, and the second coupling part can receive the waste toner from the second discharge part. 
     For this reason, even though the drawer does not include a member configured to collect the waste toner from the first discharge part and the second discharge part and to convey the same to the waste toner box, it is possible to accommodate the waste toner from the first photosensitive drum and the second photosensitive drum into the waste toner box. Also, in a state where the waste toner box is located at the second position, the first coupling part and the first discharge part are decoupled and the second coupling part and the second discharge part are decoupled. As a result, it is possible to secure smooth movement of the drawer while accommodating the waste toner from the first photosensitive drum and the second photosensitive drum into the waste toner box. 
     According to the disclosure, it is possible to secure smooth movement of the drawer while accommodating the waste toner from the plurality of photosensitive drums. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       Illustrative aspects of the invention will be described in detail with reference to the following figures wherein: 
         FIG.  1    is a schematic configuration view of an image forming apparatus; 
         FIG.  2    depicts a state where a drawer shown in  FIG.  1    is located at an outer position; 
         FIG.  3    is a sectional view taken along a line III-III of the image forming apparatus shown in  FIG.  1   , depicting a cartridge; 
         FIG.  4 A  is a sectional view taken along a line IVA-IVA of the cartridge shown in  FIG.  3   , and  FIG.  4 B  is a sectional view taken along a line IVB-IVB of the cartridge shown in  FIG.  3   ; 
         FIG.  5    is a sectional view taken along a line V-V of the image forming apparatus shown in  FIG.  1   ; 
         FIG.  6    is a perspective view of a waste toner box shown in  FIG.  5   ; 
         FIG.  7    is a sectional view taken along a line D-D of the image forming apparatus shown in  FIG.  1   ; 
         FIG.  8    is an enlarged view of the image forming apparatus shown in  FIG.  5   , depicting a state where the waste toner box is located at a first position and a toner box is located at a coupling position; 
         FIG.  9    depicts a state where the waste toner box shown in  FIG.  8    is located at a second position and the toner box is located at a decoupling position; 
         FIG.  10 A  depicts a state where the waste toner box shown in  FIG.  9    is located at a third position and the toner box is located at the coupling position, and  FIG.  10 B  depicts a state where the waste toner box shown in  FIG.  9    is located at the first position and the toner box is located at a separable position; 
         FIG.  11 A  is a first schematic configuration view of the toner box shown in  FIG.  8   , and  FIG.  11 B  is a second schematic configuration view of the toner box shown in  FIG.  8   ; 
         FIG.  12    depicts the image forming apparatus shown in  FIG.  7   , in which a cover is located at an opening position; 
         FIG.  13    is a perspective view of a first link member shown in  FIG.  7   ; and 
         FIG.  14    is a perspective view of the first link member and a second link member shown in  FIG.  7   . 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     In the related-art image forming apparatus, the collective conveying unit may be an obstacle to movement of the drawer. 
     Therefore, illustrative aspects of the disclosure provide an image forming apparatus capable of securing smooth movement of a drawer while accommodating waste toner from a plurality of photosensitive drums into a waste toner box. 
     1. Outline of Image Forming Apparatus  1   
     An outline of an image forming apparatus  1  is described with reference to  FIG.  1   . 
     The image forming apparatus  1  includes an apparatus main body  2 , a feeder unit  10 , a drawer  3 , a plurality of cartridges  4 K,  4 Y,  4 M,  4 C, an exposure device  11 , a belt unit (one example of a belt device)  6 , a secondary transfer roller  14 , a fixing device  12 , and a duplex printing path  13 . 
     1.1 Apparatus Main Body 
     The apparatus main body  2  is configured to accommodate therein the feeder unit  10 , the drawer  3 , the plurality of cartridges  4 K,  4 Y,  4 M,  4 C, the exposure device  11 , the belt unit  6 , the secondary transfer roller  14 , the fixing device  12 , and the duplex printing path  13 . The apparatus main body  2  has an opening  2 A and a cover  2 B. 
     The opening  2 A is located at an opposite side to the fixing device  12  with respect to the plurality of cartridges  4 K,  4 Y,  4 M,  4 C in a state where the drawer  3  is mounted to the apparatus main body  2 . 
     The cover  2 B is configured to be movable between a closing position (refer to  FIG.  1   ) at which the opening  2 A is closed and an opening position (refer to  FIG.  2   ) at which the opening  2 A is opened. 
     1.2 Feeder Unit 
     The feeder unit  10  is configured to feed a printing medium to the secondary transfer roller  14 . The printing medium is a printing sheet, for example. The feeder unit  10  includes a sheet feeding tray  15 , a pickup roller  16 , and a feeder roller  17 . The sheet feeding tray  15  is configured to accommodate therein the printing medium. The pickup roller  16  is configured to convey the printing medium in the sheet feeding tray  15  toward the feeder roller  17 . The feeder roller  17  is configured to convey the printing medium from the pickup roller  16  toward the secondary transfer roller  14 . 
     1.3 Drawer 
     The drawer  3  is configured to be movable between an inner position located inside the apparatus main body  2  (refer to  FIG.  1   ) and an outer position located outside the apparatus main body  2  (refer to  FIG.  2   ) through the opening  2 A, in a state where the cover  2 B is located at the opening position (refer to  FIG.  2   ). The drawer  3  is configured to support the plurality of cartridges  4 K,  4 Y,  4 M,  4 C. The drawer  3  is configured to be movable between the inner position and the outer position in an alignment direction (which will be described later), in a state where it supports the plurality of cartridges  4 K,  4 Y,  4 M,  4 C. In the meantime, the inner position is a position at which the drawer  3  is accommodated in the apparatus main body  2  and the plurality of cartridges  4 K,  4 Y,  4 M,  4 C cannot be mounted and demounted to and from the drawer  3 . The outer position is a position at which at least a part of the drawer  3  is located outside the apparatus main body  2  and at least one of the plurality of cartridges  4 K,  4 Y,  4 M,  4 C can be mounted and demounted to and from the drawer  3 . For this reason, even when a part of the drawer  3  is located inside the apparatus main body  2 , if at least one of the plurality of cartridges  4 K,  4 Y,  4 M,  4 C can be mounted and demounted to and from the drawer  3 , a position of the drawer  3  is included in the outer position. 
     1.4 Cartridge 
     The plurality of cartridges  4 K,  4 Y,  4 M,  4 C is supported to the drawer  3 . The plurality of cartridges  4 K,  4 Y,  4 M,  4 C is aligned with intervals. A direction in which the plurality of cartridges  4 K,  4 Y,  4 M,  4 C is aligned is defined as ‘alignment direction’. The alignment direction intersects with an axis direction. Preferably, the alignment direction is perpendicular to in the axis direction. The axis direction will be described later. Each of the plurality of cartridges  4 K,  4 Y,  4 M,  4 C includes a photosensitive drum  40 , a charging roller  48 , and a developing unit (one example of a developing device)  44 . 
     The photosensitive drum  40  is configured to be rotatable about a rotational axis A. A direction in which the rotational axis A of the photosensitive drum  40  extends is defined as ‘axis direction’. The axis direction intersects with both a vertical direction and the alignment direction. Preferably, the axis direction is perpendicular to both the vertical direction and the alignment direction. The photosensitive drum  40  extends in the axis direction, and has a cylindrical shape. 
     The charging roller  48  is configured to charge a peripheral surface of the photosensitive drum  40 . The charging roller  48  is in contact with the peripheral surface of the photosensitive drum  40 . In the meantime, the charging roller  48  may be replaced with a non-contact type charger such as a scorotron-type charger. 
     The developing unit  44  includes a developing roller  45 . The developing unit  44  is arranged so that the developing roller  45  is to face the photosensitive drum  40 . The developing roller  45  is configured to supply toner in the developing unit  44  to the photosensitive drum  40 . The developing roller  45  is in contact with the photosensitive drum  40 . The developing roller  45  is configured to develop a latent image formed on the photosensitive drum  40 , thereby forming a toner image on the peripheral surface of the photosensitive drum  40 . 
     1.5 Exposure Device 
     The exposure device  11  is configured to expose the photosensitive drum  40 , thereby forming a latent image. The exposure device  11  is configured to expose the peripheral surface of the photosensitive drum  40  charged by the charging roller  48 . Thereby, a latent image is formed on the peripheral surface of the photosensitive drum  40 . The exposure device  11  is located above the drawer  3  in a state where the drawer  3  is located at the inner position. The exposure device  11  is, specifically, a laser scan unit. 
     1.6 Belt Unit 
     The belt unit  6  is arranged to face the photosensitive drums  40  of the plurality of cartridges  4 K,  4 Y,  4 M,  4 C in the state where the drawer  3  is located at the inner position. The belt unit  6  is located between the drawer  3  and the sheet feeding tray  15  in the state where the drawer  3  is located at the inner position. The belt unit  6  includes a first roller  60 , a second roller  61 , an intermediate transfer belt  62 , a plurality of primary transfer rollers  63 K,  63 Y,  63 M,  63 C, and a belt cleaner  64 . 
     The first roller  60  is configured to be rotatable about a rotational axis extending in the axis direction. The second roller  61  is located with being spaced from the first roller  60  in the alignment direction. The second roller  61  is located at an opposite side to the fixing device  12  with respect to the first roller  60  in the alignment direction. The second roller  61  is configured to be rotatable about a rotational axis extending in the axis direction. 
     The intermediate transfer belt  62  is supported by the first roller  60  and the second roller  61 . The intermediate transfer belt  62  is an endless belt. The intermediate transfer belt  62  is wound around the first roller  60  and the second roller  61 . The intermediate transfer belt  62  is configured to be movable around the first roller  60  and the second roller  61 . The intermediate transfer belt  62  is in contact with the photosensitive drum  40 , in the state where the drawer  3  is located at the inner position. 
     Each of the plurality of primary transfer rollers  63 K,  63 Y,  63 M,  63 C is configured to transfer the toner image from the photosensitive drum  40  to the intermediate transfer belt  62 . The plurality of primary transfer rollers  63 K,  63 Y,  63 M,  63 C is located between the first roller  60  and the second roller  61 . The plurality of primary transfer rollers  63 K,  63 Y,  63 M,  63 C is aligned in the alignment direction. The plurality of primary transfer rollers  63 K,  63 Y,  63 M,  63 C has the same structure, respectively. Each of the plurality of primary transfer rollers  63 K,  63 Y,  63 M,  63 C is located at an opposite side to the photosensitive drum  40  with respect to the intermediate transfer belt  62 . 
     The belt cleaner  64  is configured to clean the intermediate transfer belt  62 , thereby removing waste toner from a peripheral surface of the intermediate transfer belt  62 . The belt cleaner  64  is located between the first roller  60  and the fixing device  12 . The belt cleaner  64  is located at an opposite side to the first roller  60  with respect to the intermediate transfer belt  62 . 
     1.7 Secondary Transfer Roller 
     The secondary transfer roller  14  is configured to transfer the toner image from the intermediate transfer belt  62  to the printing medium. The secondary transfer roller  14  is located at an opposite side to the first roller  60  with respect to the intermediate transfer belt  62 . The intermediate transfer belt  62  passes between the secondary transfer roller  14  and the first roller  60  when it is moved. The secondary transfer roller  14  is provided for a secondary transfer unit  18 . 
     The secondary transfer unit  18  is located between the belt unit  6  and the sheet feeding tray  15 . The secondary transfer unit  18  can be demounted from the apparatus main body  2  through an opening  2 C of the apparatus main body  2  (refer to  FIG.  2   ). The opening  2 C is located at an opposite side to the opening  2 A with respect to the drawer  3  in the state where the drawer  3  is located at the inner position. 
     1.8 Fixing Device 
     The fixing device  12  is configured to heat and press the printing medium having the toner images transferred thereto, thereby fixing the toner images on the printing medium. The printing medium having passed through the fixing device  12  is discharged onto an upper surface of the apparatus main body  2 . 
     1.9 Duplex Printing Path 
     The duplex printing path  13  is formed to again convey the printing medium having passed through the fixing device  12  toward the secondary transfer roller  14 . The duplex printing path  13  includes a first path  13 A, a second path  13 B, and a third path  13 C. 
     The first path  13 A is located at an opposite side to the drawer  3  with respect to the fixing device  12  in the alignment direction, in the state where the drawer  3  is located at the inner position. The first path  13 A extends in the vertical direction. 
     The second path  13 B is a part between the first path  13 A and the third path  13 C of the duplex printing path  13 . The second path  13 B is located below the sheet feeding tray  15 . The second path  13 B extends in the alignment direction. The second path  13 B has one end and the other end in the alignment direction. One end of the second path  13 B continues to a lower end of the third path  13 C. The other end of the second path  13 B continues to a lower end of the first path  13 A. 
     The third path  13 C is located at an opposite side to the first path  13 A with respect to the feeder roller  17  in the alignment direction. The third path  13 C extends in the vertical direction. The third path  13 C is supported to the sheet feeding tray  15 . 
     2. Details of Cartridge 
     Subsequently, the plurality of cartridges  4 K,  4 Y,  4 M,  4 C is described in detail with reference to  FIGS.  3 ,  4 A and  4 B . In the meantime, the plurality of cartridges  4 K,  4 Y,  4 M,  4 C has the same structure. Therefore, in the below, the cartridge  4 M is described, and the descriptions of the cartridges  4 K,  4 Y,  4 C are omitted. 
     As shown in  FIG.  3   , each of the plurality of cartridges  4 K,  4 Y,  4 M,  4 C further has a frame  46 , a frame  47 , a shaft  72 , an elastic member  70 , a receiving part  43 , a drum cleaner  49 , and a discharge part  41 . 
     2.1 Frame 
     The frame  46  is located at one end of the cartridge  4 M in the axis direction. The frame  47  is located at the other end of the cartridge  4 M in the axis direction. The frame  46  and the frame  47  are located with an interval in the axis direction. The frame  46  and the frame  47  extend in a direction intersecting with the axis direction, respectively. The frame  46  and the frame  47  are configured to rotatably support the photosensitive drum  40  and to swingably support the developing unit  44 . The frame  46  is configured to rotatably support one end of the photosensitive drum  40  in the axis direction. The frame  47  is configured to rotatably support the other end of the photosensitive drum  40  in the axis direction. The frame  46  is arranged to face the developing unit  44  in the axis direction in which the rotational axis A of the photosensitive drum  40  extends. The frame  47  is located at an opposite side to the frame  46  with respect to the developing unit  44 . The frame  46  and the frame  47  are configured to rotatably support the shaft  72 . The frame  46  and the frame  47  are configured to support the developing unit  44  via the shaft  72 . 
     2.2 Shaft 
     The shaft  72  is configured to support the developing unit  44  so that the developing roller  45  can move relative to the photosensitive drum  40 . The shaft  72  is located above the photosensitive drum  40  in a state where the cartridge  4 M is supported to the drawer  3 . The shaft  72  extends in the axis direction. The shaft  72  has one end and the other end in the axis direction. One end of the shaft  72  is rotatably supported to the frame  46 . The other end of the shaft  72  is rotatably supported to the frame  47 . 
     2.3 Developing Frame 
     The developing unit  44  further includes a developing frame  76 . The developing frame  76  is configured to support the developing roller  45 . The developing frame  76  is mounted to the shaft  72 . The developing frame  76  is located between the frame  46  and the frame  47  in the axis direction. The developing frame  76  extends in the axis direction. The developing frame  76  has one end  76 A and the other end  76 B in the axis direction. One end  76 A of the developing frame  76  is arranged to face the frame  46  with an interval in the axis direction. The other end  76 B of the developing frame  76  is located at an opposite side to the frame  46  with respect to one end  76 A. 
     2.4 Elastic Member 
     The elastic member  70  is arranged between the developing unit  44  and the frame  46  in the axis direction. For this reason, it is possible to suppress the toner from being leaked from between the developing unit  44  and the frame  46  while securing smooth swing of the developing unit  44 . The elastic member  70  is arranged between one end  76 A of the developing frame  76  and the frame  46  in the axis direction. The elastic member  70  may be formed of rubber, sponge or the like, for example. The elastic member  70  has a through-opening  70 A. The frame  46  has a first hole  46 A. The elastic member  70  is fixed to the frame  46  so that the through-opening  70 A is to communicate with the first hole  46 A in the axis direction. Also, one end  76 A of the developing frame  76  has a first communication hole  76 C. The first communication hole  76 C is formed to communicate with an internal space of the developing frame  76  and the through-opening  70 A in the axis direction. That is, the first hole  46 A, the through-opening  70 A and the first communication hole  76 C are formed to communicate with each other in the axis direction. Also, the first hole  46 A is formed to communicate with an internal space of the toner receiving wall  73 . For this reason, the internal space of the toner receiving wall  73  and the internal space of the developing frame  76  communicate with each other through the first hole  46 A, the through-opening  70 A and the first communication hole  76 C. The toner receiving wall  73  will be described later. 
     2.5 Receiving Part 
     As shown in  FIG.  4 A , the receiving part  43  is configured to receive the toner from each of a plurality of toner boxes  9 K,  9 Y,  9 M,  9 C. In the meantime, the plurality of toner boxes  9 K,  9 Y,  9 M,  9 C will be described later. The receiving part  43  has a toner receiving wall  73 , a toner coupling wall  74 , and a shutter  75 . 
     The toner receiving wall  73  is located at an opposite side to the developing unit  44  with respect to the frame  46 . The toner receiving wall  73  has a cylindrical shape. The toner receiving wall  73  extends in the axis direction. The toner receiving wall  73  has one end and the other end in the axis direction. One end of the toner receiving wall  73  is closed (refer to  FIG.  3   ). The other end of the toner receiving wall  73  is fixed to the frame  46  so that the internal space of the toner receiving wall  73  is to communicate with the first hole  46 A. The toner receiving wall  73  has a toner receiving opening  73 A. The toner is received into the toner receiving opening  73 A. The toner receiving opening  73 A is located at an upper end of the toner receiving wall  73  in the state where the cartridge  4 M is supported to the drawer  3 . 
     The toner coupling wall  74  is located above the toner receiving wall  73 , in the state where the cartridge  4 M is supported to the drawer  3 . The toner coupling wall  74  has a semi-cylindrical shape. The toner coupling wall  74  is opened upward, in the state where the cartridge  4 M is supported to the drawer  3 . The toner coupling wall  74  extends in the axis direction. The toner coupling wall  74  has one end and the other end in the axis direction. One end of the toner coupling wall  74  is opened (refer to  FIG.  3   ). The other end of the toner coupling wall  74  is closed. The toner coupling wall  74  is connected to the toner receiving wall  73  so that an internal space of the toner coupling wall  74  is to communicate with the toner receiving opening  73 A. Thereby, the internal space of the toner coupling wall  74  communicates with the internal space of the toner receiving wall  73  through the toner receiving opening  73 A. 
     The shutter  75  is arranged within the toner coupling wall  74 . The shutter  75  has a semi-circular arc shape conforming to an inner peripheral surface of the toner coupling wall  74 . The shutter  75  is configured to be movable between a closing position at which the toner receiving opening  73 A is closed and an opening position at which the toner receiving opening  73 A is opened. 
     2.6 Drum Cleaner 
     As shown in  FIG.  4 B , the drum cleaner  49  is located at an opposite side to the developing unit  44  with respect to the photosensitive drum  40 . The drum cleaner  49  has a drum cleaner frame  49 A, a drum cleaning blade  49 B, and an auger  49 C. 
     The drum cleaner frame  49 A is configured to accommodate therein waste toner removed from the peripheral surface of the photosensitive drum  40  by the drum cleaning blade  49 B. The drum cleaner frame  49 A has an opening  49 D for receiving the waste toner. The drum cleaner frame  49 A is located between the frame  46  and the frame  47  in the axis direction. The drum cleaner frame  49 A extends in the axis direction. 
     The drum cleaning blade  49 B is configured to clean the photosensitive drum  40 , thereby removing the waste toner from the peripheral surface of the photosensitive drum  40 . An edge of the drum cleaning blade  49 B is located in the opening  49 D. The edge of the drum cleaning blade  49 B is in contact with the peripheral surface of the photosensitive drum  40 . Thereby, when the photosensitive drum  40  is rotated, the toner attached to the peripheral surface of the photosensitive drum  40  is scraped by the edge of the drum cleaning blade  49 B and is then accommodated in the drum cleaner frame  49 A through the opening  49 D. 
     The auger  49 C is configured to convey the waste toner in the drum cleaner frame  49 A toward the discharge part  41 . The auger  49 C is located in the drum cleaner frame  49 A. The auger  49 C extends in the axis direction. 
     2.7 Discharge Part 
     As shown in  FIG.  4 A , the discharge part  41  is configured to discharge the waste toner removed from the photosensitive drum  40 . The discharge part  41  has a discharge wall  42 , a waste toner coupling wall  71 , and an elastic member  24 . 
     The discharge wall  42  is located at an opposite side to the drum cleaner frame  49 A with respect to the frame  46  (refer to  FIG.  3   ). The frame  46  has a second hole  46 B. The second hole  46 B is formed to communicate with an internal space of the drum cleaner frame  49 A in the axis direction. The discharge wall  42  has a cylindrical shape. The discharge wall  42  extends in the axis direction. The discharge wall  42  has one end and the other end in the axis direction. One end of the discharge wall  42  is closed (refer to  FIG.  3   ). The other end of the discharge wall  42  is fixed to the frame  46  so that an internal space of the discharge wall  42  is to communicate with the second hole  46 B. Thereby, the internal space of the drum cleaner frame  49 A and the internal space of the discharge wall  42  communicate with each other through the second hole  46 B, in the axis direction. The discharge wall  42  has a discharge opening  42 A. The waste toner is to pass through the discharge opening  42 A. The discharge opening  42 A is located at a lower end of the discharge wall  42 , in the state where the cartridge  4 M is supported to the drawer  3 . 
     The waste toner coupling wall  71  is located below the discharge wall  42  in the state where the cartridge  4 M is supported to the drawer  3 . The waste toner coupling wall  71  extends in the axis direction. The waste toner coupling wall  71  has one end and the other end in the axis direction. One end of the waste toner coupling wall  71  is opened. The other end of the waste toner coupling wall  71  is closed (refer to  FIG.  3   ). The waste toner coupling wall  71  is connected to the discharge wall  42  so that an internal space of the waste toner coupling wall  71  is to communicate with the discharge opening  42 A. Thereby, the internal space of the waste toner coupling wall  71  communicates with the internal space of the discharge wall  42 , through the discharge opening  42 A. 
     The elastic member  24  is located within the waste toner coupling wall  71 . The elastic member  24  has a communication opening  24 A. The elastic member  24  is fixed to an inner peripheral surface of the waste toner coupling wall  71  so that the communication opening  24 A is to communicate with the discharge opening  42 A. The elastic member  24  may be formed of rubber, sponge or the like, for example. 
     3. Details of Image Forming Apparatus 
     As shown in  FIG.  5   , the image forming apparatus  1  further includes a waste toner box  5 , and a plurality of toner boxes  9 K,  9 Y,  9 M,  9 C (refer to  FIG.  7   ). 
     3.1 Waste Toner Box 
     As shown in  FIG.  6   , the waste toner box  5  has a box main body  52 , a plurality of coupling parts  50 K,  50 Y,  50 M,  50 C, and a sub-coupling part  53 . 
     3.1.1 Box Main Body 
     The box main body  52  can accommodate therein the waste toner removed from the photosensitive drum  40  and the waste toner removed from the intermediate transfer belt  62  (refer to  FIG.  1   ). The box main body  52  extends in the alignment direction. The box main body  52  has a first wall  52 A, a second wall  52 B, a first sidewall  52 C, a second sidewall  52 D, a bottom wall  52 E, an upper wall  52 F, and an inclined wall  52 G. In the meantime, the configuration of the box main body  52  is described on the basis of a state where the waste toner box  5  is located at a first position, which will be described later. 
     The first wall  52 A is configured to support the plurality of coupling parts  50 K,  50 Y,  50 M,  50 C. The second wall  52 B is located at an opposite side to the plurality of coupling parts  50 K,  50 Y,  50 M,  50 C with respect to the first wall  52 A. The second wall  52 B is located with being spaced from the first wall  52 A in the axis direction. 
     The first sidewall  52 C and the second sidewall  52 D are located at both end portions of the box main body  52  in the alignment direction, and are spaced from each other in the alignment direction. The bottom wall  52 E is located at a lower end portion of the box main body  52 . 
     The upper wall  52 F is arranged with being spaced from the bottom wall  52 E in the vertical direction, and extends in parallel with the bottom wall  52 E. The upper wall  52 F has one end and the other end in the axis direction. One end of the upper wall  52 F in the axis direction is located with being spaced from an upper end of the second wall  52 B. One end of the upper wall  52 F in the axis direction is located above the upper end of the second wall  52 B. The other end of the upper wall  52 F in the axis direction is connected to an upper end of the first wall  52 A. 
     The inclined wall  52 G is formed to interconnect one end of the upper wall  52 F in the axis direction and the upper end of the second wall  52 B. The inclined wall  52 G intersects with both the vertical direction and the axis direction. The inclined wall  52 G is inclined toward the bottom wall  52 E from the upper wall  52 F toward the second wall  52 B. Since the inclined wall  52 G is inclined, when mounting and demounting the plurality of toner boxes  9 K,  9 Y,  9 M,  9 C to and from the apparatus main body  2 , it is possible to suppress the waste toner box  5  from being an obstacle (refer to  FIG.  10 B ). 
     3.1.2 Coupling Part 
     The plurality of coupling parts  50 K,  50 Y,  50 M,  50 C can be coupled with the discharge parts  41  of the plurality of cartridges  4 K,  4 Y,  4 M,  4 C (refer to  FIG.  7   ). Specifically, the coupling part  50 K can be coupled with the discharge part  41  of the cartridge  4 K. The coupling part  50 Y can be coupled with the discharge part  41  of the cartridge  4 Y. The coupling part  50 M can be coupled with the discharge part  41  of the cartridge  4 M. The coupling part  50 C can be coupled with the discharge part  41  of the cartridge  4 C. 
     The plurality of coupling parts  50 K,  50 Y,  50 M,  50 C is located on an outer surface of the box main body  52  in the axis direction. The plurality of coupling parts  50 K,  50 Y,  50 M,  50 C protrudes from the first wall  52 A. The plurality of coupling parts  50 K,  50 Y,  50 M,  50 C is arranged with intervals in the alignment direction. The plurality of coupling parts  50 K,  50 Y,  50 M,  50 C has the same structure, respectively. Therefore, the coupling part  50 M is described, and the descriptions of the coupling parts  50 K,  50 Y,  50 C are omitted. 
     The coupling part  50 M has a cylindrical shape. The coupling part  50 M extends in the axis direction. The coupling part  50 M has one end and the other end in the axis direction. One end of the coupling part  50 M is fixed to the box main body  52 . The other end of the coupling part  50 M is closed. An internal space of the coupling part  50 M is formed to communicate with an internal space of the box main body  52 . The coupling part  50 M has a receiving wall  51 . That is, the plurality of coupling parts  50 K,  50 Y,  50 M,  50 C has a receiving wall  51 , respectively. The receiving wall  51  is located at an upper end of the coupling part  50 M in the state where the waste toner box  5  is located at a first position. The first position of the waste toner box  5  will be described later. The receiving wall  51  has a receiving opening  55 . The waste toner from the discharge opening  42 A is received through the receiving opening  55 . 
     3.1.3 Sub-Coupling Part 
     The sub-coupling part  53  is located on an outer surface of the box main body  52  in the axis direction. The sub-coupling part  53  protrudes from the first wall  52 A. The sub-coupling part  53  is arranged with being spaced from the coupling part  50 C in the alignment direction. The sub-coupling part  53  has the same structure as the coupling part  50 M. Therefore, the detailed description of the sub-coupling part  53  is omitted. In the meantime, a receiving wall of the sub-coupling part  53  is described as a receiving wall  54 , and a receiving opening of the sub-coupling part  53  is described as a receiving opening  56 . 
     Also, as shown in  FIG.  7   , the sub-coupling part  53  can be coupled with a sub-discharge part  65  of the belt unit  6 . The sub-discharge part  65  is configured to discharge the waste toner removed from the intermediate transfer belt  62  (refer to  FIG.  1   ) by the belt cleaner  64  (refer to  FIG.  1   ). The sub-discharge part  65  has the same configuration as the discharge part  41 . Therefore, the detailed description of the sub-discharge part  65  is omitted. In the meantime, a discharge wall of the sub-discharge part  65  is described as a discharge wall  67 , a waste toner coupling wall of the sub-discharge part  65  is described as a waste toner coupling wall  68 , and an elastic member of the sub-discharge part  65  is described as an elastic member  69 . 
     3.1.4 First Position of Waste Toner Box 
     The waste toner box  5  is configured to be movable between a first position (refer to  FIG.  8   ) and a second position (refer to  FIG.  9   ) in a state where the waste toner box is mounted to the apparatus main body  2 . In the exemplary embodiment, the waste toner box  5  is configured to be rotatable among the first position (refer to  FIG.  8   ), the second position (refer to  FIG.  9   ), and a third position (refer to  FIG.  10 A ) in the state where the waste toner box is mounted to the apparatus main body  2 . For this reason, it is possible to smoothly move the waste toner box  5  to the first position, the second position and the third position. 
     As shown in  FIG.  8   , in a state where the plurality of cartridges  4 K,  4 Y,  4 M,  4 C is supported to the drawer  3  located at the inner position and the waste toner box  5  is located at the first position, the waste toner box  5  is arranged in alignment with the plurality of cartridges  4 K,  4 Y,  4 M,  4 C in the axis direction in which the rotational axis A of the photosensitive drum  40  extends (refer to  FIG.  1   ). In the state where the plurality of cartridges  4 K,  4 Y,  4 M,  4 C is supported to the drawer  3  located at the inner position and the waste toner box  5  is located at the first position, the plurality of coupling parts  50 K,  50 Y,  50 M,  50 C and the discharge parts  41  of the plurality of cartridges  4 K,  4 Y,  4 M,  4 C are coupled with each other (refer to  FIG.  7   ). Specifically, the coupling part  50 K is coupled with the discharge part  41  of the cartridge  4 K, the coupling part  50 Y is coupled with the discharge part  41  of the cartridge  4 Y, the coupling part  50 M is coupled with the discharge part  41  of the cartridge  4 M, and the coupling part  50 C is coupled with the discharge part  41  of the cartridge  4 C. More specifically, each of the plurality of coupling parts  50 K,  50 Y,  50 M,  50 C is fitted to the waste toner coupling wall  71  (refer to  FIG.  7   ). The receiving wall  51  faces the discharge wall  42  in the state where the waste toner box  5  is located at the first position. The receiving wall  51  has a first end portion  51 A and a second end portion  51 B in a direction facing from the waste toner box  5  toward the plurality of cartridges  4 K,  4 Y,  4 M,  4 C. The second end portions  51 B are located at an opposite side to the plurality of cartridges  4 K,  4 Y,  4 M,  4 C with respect to the first end portions  51 A, in the state where the waste toner box  5  is located at the first position. The receiving wall  51  is inclined so as to be distant from the discharge wall  42  from the second end portion  51 B toward the first end portion  51 A in the state where the waste toner box  5  is located at the first position. For this reason, when the waste toner box  5  is moved from the second position (refer to  FIG.  9   ) to the first position, it is possible to suppress the receiving wall  51  from contacting the discharge wall  42  and to stably arrange the receiving wall  51  so as to face the discharge wall  42 . 
     Also, the elastic member  24  is arranged between the discharge wall  42  and the receiving wall  51  in the state where the waste toner box  5  is located at the first position. The communication opening  24 A communicates with each of the discharge opening  42 A and the receiving opening  55 . For this reason, in the state where the waste toner box  5  is located at the first position, the elastic member  24  can stably fill a gap between the discharge wall  42  and the receiving wall  51 . The waste toner that is discharged from the discharge opening  42 A is received into the receiving opening  55  through the communication opening  24 A. As a result, it is possible to prevent the waste toner from being leaked from between the discharge wall  42  and the receiving wall  51 . 
     Also, the sub-coupling part  53  is fitted to the waste toner coupling wall  68  in the state where the waste toner box  5  is located at the first position (refer to  FIG.  7   ). 
     3.1.5 Second Position of Waste Toner Box 
     As shown in  FIG.  9   , in a state where the plurality of cartridges  4 K,  4 Y,  4 M,  4 C is supported to the drawer  3  located at the inner position and the waste toner box  5  is located at the second position, the waste toner box  5  is located more distant from the plurality of cartridges  4 K,  4 Y,  4 M,  4 C, as compared to the case where the waste toner box  5  is located at the first position (refer to  FIG.  1   ). Specifically, in a state where the waste toner box  5  is accommodated in a first accommodation frame  31  (which will be described later), the waste toner box is rotated about a rotary shaft  32  (which will be described later), which is a support point, and is tilted so as to be distant from the first wall  20 . In the state where the plurality of cartridges  4 K,  4 Y,  4 M,  4 C is supported to the drawer  3  located at the inner position and the waste toner box  5  is located at the second position, the plurality of coupling parts  50 K,  50 Y,  50 M,  50 C and the discharge parts  41  of the plurality of cartridges  4 K,  4 Y,  4 M,  4 C are decoupled. Specifically, the coupling part  50 K and the discharge part  41  of the cartridge  4 K are decoupled, the coupling part  50 Y and the discharge part  41  of the cartridge  4 Y are decoupled, the coupling part  50 M and the discharge part  41  of the cartridge  4 M are decoupled, and the coupling part  50 C and the discharge part  41  of the cartridge  4 C are decoupled. More specifically, each of the plurality of coupling parts  50 K,  50 Y,  50 M,  50 C is separated from the waste toner coupling wall  71 , and is located with being spaced from each of the discharge parts  41  of the plurality of cartridges  4 K,  4 Y,  4 M,  4 C in the axis direction. 
     In the meantime, in the state where the waste toner box  5  is located at the second position, the plurality of toner boxes  9 K,  9 Y,  9 M,  9 C mounted to the apparatus main body  2  is located downstream of the waste toner box  5  located at the second position with respect to a separation direction of the waste toner box  5  from the apparatus main body  2 . For this reason, in the state where the waste toner box  5  is located at the second position, the waste toner box  5  cannot be separated from the apparatus main body  2 . 
     3.1.6 Third Position of Waste Toner Box 
     As shown in  FIG.  10 A , in a state where the waste toner box  5  is located at the third position, the waste toner box  5  is located more distant from the first position than the second position. In the state where the waste toner box  5  is located at the third position, a distance between each of the plurality of coupling parts  50 K,  50 Y,  50 M,  50 C and each of the plurality of discharge part  41  is greater than a distance in the state where the waste toner box  5  is located at the second position. Specifically, when the waste toner box  5  is moved from the second position to the third position, a first accommodation frame  31  (which will be described later) configured to support the waste toner box  5  is rotated about a rotary shaft  32  (which will be described later), which is a support point, and is tilted so as to be distant from the first wall  20 . 
     Thereby, in the state where the waste toner box  5  is located at the third position, the plurality of toner boxes  9 K,  9 Y,  9 M,  9 C mounted to the apparatus main body  2  is not located downstream of the waste toner box  5  located at the third position with respect to the separation direction of the waste toner box  5  from the apparatus main body  2 . For this reason, in the state where the waste toner box  5  is located at the third position, the waste toner box  5  can be separated from the apparatus main body  2 . 
     3.2 Support Configuration of Waste Toner Box 
     As shown in  FIG.  8   , the apparatus main body  2  is configured to support the waste toner box  5  so that the waste toner box  5  can move. Specifically, the apparatus main body  2  further includes a first wall  20 , a second wall  21 , and a first support part  26 . 
     3.2.1 First Wall 
     The first wall  20  is formed to divide an internal space of the apparatus main body  2  into a first space in which the plurality of cartridges  4 K,  4 Y,  4 M,  4 C (refer to  FIG.  1   ) is accommodated and a second space in which the waste toner box  5  and the plurality of toner boxes  9 K,  9 Y,  9 M,  9 C (refer to  FIG.  8   ) are accommodated. The first wall  20  extends in the vertical direction. The first wall  20  is located between the plurality of cartridges  4 K,  4 Y,  4 M,  4 C and the waste toner box  5  located at the first position. Specifically, the first wall  20  is located between the plurality of cartridges  4 K,  4 Y,  4 M,  4 C and the box main body  52  of the waste toner box  5  located at the first position, in the axis direction. The first wall  20  has a plurality of first hole  20 A. Each of the plurality of first hole  20 A is formed to face the waste toner coupling wall  71  in the axis direction, in the state where the drawer  3  is located at the inner position. The plurality of first hole  20 A is formed to receive the plurality of coupling parts  50 K,  50 Y,  50 M,  50 C (refer to  FIG.  6   ), in the state where the waste toner box  5  is located at the first position. 
     3.2.2 Second Wall 
     The second wall  21  is located at an opposite side to the plurality of cartridges  4 K,  4 Y,  4 M,  4 C with respect to the waste toner box  5  located at the first position. The second wall  21  is located with being spaced from the first wall  20  in the axis direction. The second wall  21  extends in the vertical direction. The second wall  21  has a second opening  21 A and a movable wall  21 B. 
     The second opening  21 A is located at an opposite side to the plurality of cartridges  4 K,  4 Y,  4 M,  4 C with respect to the waste toner box  5  located at the first position, in the axis direction. 
     The movable wall  21 B is configured to be movable in association with movement of the waste toner box  5 . For this reason, it is possible to suppress the second wall  21  from being an obstacle to movement of the waste toner box  5 , so that it is possible to secure smooth movement of the waste toner box  5 . The movable wall  21 B is supported to a lower end of the second opening  21 A of the second wall  21 . The movable wall  21 B can swing about a lower end portion of the movable wall  21 B, which is a support point. The movable wall  21 B extends in the vertical direction, in the state where the waste toner box  5  is located at the first position. 
     3.2.3 First Accommodation Part 
     The first support part  26  is configured to support the waste toner box  5 . The first support part  26  is located between the first wall  20  and the second wall  21  in the axis direction. The first support part  26  is supported to the first wall  20 . The first support part  26  has a rotary shaft  32  and a first accommodation frame  31 . 
     The rotary shaft  32  extends in the alignment direction. The rotary shaft  32  is rotatably supported to the first wall  20 . 
     The first accommodation frame  31  can accommodate therein the waste toner box  5 . The first accommodation frame  31  has a first side frame  31 A, a second side frame  31 B, a movable frame  31 C, and a mounting/demounting opening  31 D. 
     The first side frame  31 A is located at one end of the first accommodation frame  31  in the axis direction. The second side frame  31 B is located at the other end of the first accommodation frame  31  in the axis direction. The first side frame  31 A is located at an opposite side to the first wall  20  with respect to the box main body  52 , in the state where the waste toner box  5  is located at the first position. The second side frame  31 B is located between the box main body  52  and the first wall  20  in the state where the waste toner box  5  is located at the first position. Each of the first side frame  31 A and the second side frame  31 B extends in the vertical direction, in the state where the waste toner box  5  is located at the first position. 
     The movable frame  31 C is configured to be movable in association with movement of the plurality of toner boxes  9 K,  9 Y,  9 M,  9 C. The movable frame  31 C is supported to an upper end of the first side frame  31 A. The movable frame  31 C extends in the vertical direction in a state where the waste toner box  5  is located at the first position and the plurality of toner boxes  9 K,  9 Y,  9 M,  9 C is located at a coupling position. In the meantime, the coupling position will be described later. The movable frame  31 C is configured to be swingable about a lower end portion of the movable frame  31 C, which is a support point. The first side frame  31 A and the movable frame  31 C are configured to close a lower part of the second opening  21 A, in the state where the waste toner box  5  is located at the first position. 
     The mounting/demounting opening  31 D is formed to allow the waste toner box  5  to pass therethrough when mounting and demounting the waste toner box  5  to and from the first accommodation frame  31 . The mounting/demounting opening  31 D is defined between an upper end of the second side frame  31 B and an upper end of the movable frame  31 C. 
     The first accommodation frame  31  is mounted to the rotary shaft  32 . Specifically, a lower end portion of the first accommodation frame  31  is fixed to the rotary shaft  32 . Thereby, the waste toner box  5  rotates about the rotary shaft  32  in a state where it is accommodated in the first support part  26 . That is, a rotation support point of the waste toner box  5  is the rotary shaft  32  and is supported to the first wall  20 . For this reason, as compared to a configuration where the rotation support point of the waste toner box  5  is supported to the second wall  21 , it is possible to reduce an amount of movement of the coupling part  50 M in the vertical direction and to make the image forming apparatus  1  smaller in the vertical direction. 
     As shown in  FIG.  9   , when the waste toner box  5  is moved from the first position to the second position, the first accommodation frame  31  is tilted so as to be distant from the first wall  20  about the rotary shaft  32 , which is a support point. In the state where the waste toner box  5  is located at the second position, the plurality of coupling parts  50 K,  50 Y,  50 M,  50 C (refer to  FIG.  6   ) is located at an opposite side to the discharge part  41  with respect to the first wall  20 . Also, in the state where the waste toner box  5  is located at the second position, the waste toner box  5  cannot be separated from the first accommodation frame  31 . In the state where the waste toner box  5  is located at the second position, the waste toner box  5  overlaps the second support part  27 M in the separation direction from the apparatus main body  2 , specifically, in the extension direction of the first side frame  31 A. In the meantime, the second support part  27 M will be described later. 
     As shown in  FIG.  10 A , when the waste toner box  5  is moved from the second position to the third position, the first accommodation frame  31  is tilted so as to be more distant from the first wall  20  than at the second position about the rotary shaft  32 , which is a support point. In the state where the waste toner box  5  is located at the third position, the waste toner box  5  does not overlap the second support part  27 M in the separation direction from the apparatus main body  2 , specifically, in the extension direction of the first side frame  31 A. Also, the mounting/demounting opening  31 D is exposed from the lower part of the second opening  21 A. For this reason, the waste toner box  5  can be separated from the first accommodation frame  31  through the mounting/demounting opening  31 D and the second opening  21 A. 
     Also, when the waste toner box  5  is moved from the first position (refer to  FIG.  8   ) to the second position (refer to  FIG.  9   ) or to the third position (refer to  FIG.  10 A ), the first side frame  31 A comes in contact with the movable wall  21 B. For this reason, the movable wall  21 B swings so as to be distant from the first wall  20  about a lower end of the movable wall  21 B, which is a support point, in association with movement of the first accommodation frame  31 . 
     3.3 Toner Box 
     As shown in  FIG.  8   , the plurality of toner boxes  9 K,  9 Y,  9 M,  9 C is configured to supply the toner to the plurality of cartridges  4 K,  4 Y,  4 M,  4 C (refer to  FIG.  7   ). Each of the plurality of toner boxes  9 K,  9 Y,  9 M,  9 C has a housing  91 , an auger  93  (refer to  FIG.  11 A ), a supply unit (one example of a supply device)  90 , and a shutter  94 . Each of the plurality of toner boxes  9 K,  9 Y,  9 M,  9 C has the same structure. Therefore, the toner box  9 M is described, and the descriptions of the toner boxes  9 K,  9 Y,  9 C are omitted. 
     3.3.1 Housing and Auger 
     As shown in  FIGS.  11 A and  11 B , the housing  91  is configured to accommodate therein the toner. The housing  91  has a partitioning wall  92  and a communication opening  92 A. 
     The partitioning wall  92  is configured to partition an internal space of the housing  91  into a first accommodation chamber  91 A and a second accommodation chamber  91 B. The partitioning wall  92  is arranged in the housing  91 . The partitioning wall  92  extends in the axis direction. The first accommodation chamber  91 A is located above the second accommodation chamber  91 B, in a state where the toner box  9 M is located at the coupling position. A first agitator  95  is arranged in the first accommodation chamber  91 A. A second agitator  96  is arranged in the second accommodation chamber  91 B. 
     The communication opening  92 A is arranged at the partitioning wall  92 . The communication opening  92 A is formed to communicate the first accommodation chamber  91 A and the second accommodation chamber  91 B each other. 
     The auger  93  is configured to convey the toner in the second accommodation chamber  91 B toward the supply unit  90 . The auger  93  extends in the axis direction. 
     3.3.2 Supply Unit and Shutter 
     As shown in  FIG.  8   , the supply unit  90  is arranged on an outer surface of the housing  91  in the axis direction. The supply unit  90  has a cylindrical shape. The supply unit  90  extends in the axis direction. The supply unit  90  has one end and the other end in the axis direction. One end of the supply unit  90  is fixed to the housing  91 . The other end of the supply unit  90  is closed. An internal space of the supply unit  90  is formed to communicate with an internal space of the housing  91 . Specifically, the supply unit  90  is configured to communicate with the second accommodation chamber  91 B (refer to  FIG.  11 A ). For this reason, it is possible to supply the toner accommodated in the housing  91  from the second accommodation chamber  91 B to the supply unit  90 . 
     The supply unit  90  can be coupled with the receiving part  43  of each of the plurality of cartridges  4 K,  4 Y,  4 M,  4 C (refer to  FIG.  7   ). The supply unit  90  can supply the toner to the receiving part  43  of each of the plurality of cartridges  4 K,  4 Y,  4 M,  4 C. 
     The supply unit  90  has a toner passage opening  90 A. The toner passage opening  90 A is formed to allow the toner to pass therethrough. The toner passage opening  90 A is located at a lower end of the supply unit  90  in the state where the toner box  9 M is located at the coupling position. 
     The shutter  94  is arranged on a peripheral surface of the supply unit  90 . The shutter  94  is configured to be movable between a closing position at which the toner passage opening  90 A is closed and an opening position at which the toner passage opening  90 A is opened. 
     3.3.3 Coupling Position of Toner Box 
     Each of the plurality of toner boxes  9 K,  9 Y,  9 M,  9 C is configured to be movable between a coupling position (refer to  FIG.  8   ) and a decoupling position (refer to  FIG.  9   ) in a state where the toner box is mounted to the apparatus main body  2 . In the exemplary embodiment, each of the plurality of toner boxes  9 K,  9 Y,  9 M,  9 C is configured to be rotatable among the coupling position (refer to  FIG.  8   ), the decoupling position (refer to  FIG.  9   ), and a separable position (refer to FIG.  10 B) in the state where the toner box is mounted to the apparatus main body  2 . For this reason, it is possible to smoothly move each of the plurality of toner boxes  9 K,  9 Y,  9 M,  9 C to the coupling position, the decoupling position and the separable position. 
     In a state where each of the plurality of toner boxes  9 K,  9 Y,  9 M,  9 C is located at the coupling position, the supply unit  90  of each of the plurality of toner boxes  9 K,  9 Y,  9 M,  9 C is coupled with the receiving part  43  of each of the plurality of cartridges  4 K,  4 Y,  4 M,  4 C (refer to  FIG.  7   ). Specifically, in a state where the toner box  9 K is located at the coupling position, the supply unit  90  of the toner box  9 K is coupled with the receiving part  43  of the cartridge  4 K. In a state where the toner box  9 Y is located at the coupling position, the supply unit  90  of the toner box  9 Y is coupled with the receiving part  43  of the cartridge  4 Y. In a state where the toner box  9 M is located at the coupling position, the supply unit  90  of the toner box  9 M is coupled with the receiving part  43  of the cartridge  4 M. In a state where the toner box  9 C is located at the coupling position, the supply unit  90  of the toner box  9 C is coupled with the receiving part  43  of the cartridge  4 C. In the meantime, each of the plurality of toner boxes  9 K,  9 Y,  9 M,  9 C is arranged in the same manner at each of the coupling position, the decoupling position and the separable position. Therefore, the toner box  9 M that is located at each of the coupling position, the decoupling position and the separable position is described, and the descriptions of the toner boxes  9 K,  9 Y,  9 C are omitted. 
     In the state where the toner box  9 M is located at the coupling position, the supply unit  90  is fitted to the toner coupling wall  74 . In a state where each of the shutter  75  and the shutter  94  is located at the opening position, the toner passage opening  90 A of the supply unit  90  and the toner receiving opening  73 A of the toner receiving wall  73  communicate with each other. Thereby, it is possible to supply toner accommodated in the housing  91  from the supply unit  90  to the toner receiving wall  73 . 
     Also, the first wall  20  is located between the cartridge  4 M and the toner box  9 M located at the coupling position. Specifically, the first wall  20  is located between the cartridge  4 M and the housing  91  of the toner box  9 M located at the coupling position, in the axis direction. 
     The first wall  20  has a plurality of second holes  20 B. Each of the plurality of second holes  20 B is formed to face the toner coupling wall  74  of the receiving part  43  in the axis direction in the state where the drawer  3  is located at the inner position. The second hole  20 B receives the supply unit  90  in the state where the toner box  9 M is located at the coupling position. 
     3.3.4 Decoupling Position of Toner Box 
     As shown in  FIG.  9   , in the state where the toner box  9 M is located at the decoupling position, the toner box  9 M is located more distant from the cartridge  4 M than at the first position. In the state where the toner box  9 M is located at the decoupling position, the supply unit  90  and the receiving part  43  are decoupled. Specifically, in the state where the toner box  9 M is located at the decoupling position, the supply unit  90  is separated from the toner coupling wall  74 . In the state where the toner box  9 M is located at the decoupling position, the supply unit  90  is located at an opposite side to the receiving part  43  with respect to the first wall  20 . For this reason, when the drawer  3  is moved to the inner position and the outer position, it is possible to suppress the supply unit  90  from being an obstacle. 
     In the meantime, in the state where the toner box  9 M is located at the decoupling position, an upper wall of the apparatus main body  2  is located downstream of the toner box  9 M located at the decoupling position with respect to the separation direction of the toner box  9 M from the apparatus main body  2 . For this reason, the toner box  9 M cannot be separated from the apparatus main body  2  in the state where the toner box  9 M is located at the decoupling position. 
     3.3.5 Separable Position of Toner Box 
     As shown in  FIG.  10 B , in a state where the toner box  9 M is located at the separable position, the toner box  9 M is located more distant from the coupling position (refer to  FIG.  8   ) that the decoupling position (refer to  FIG.  9   ). In the state where the toner box  9 M is located at the separable position, a distance between the supply unit  90  and the receiving part  43  is greater than a distance in the state where the toner box  9 M is located at the decoupling position. Specifically, when the toner box  9 M is moved from the decoupling position to the separable position, a second accommodation frame  33  (which will be described later) configured to support the toner box  9 M rotates about a rotary shaft  34  (which will be described later), which is a support point, and is thus tilted so as to be distant from the first wall  20 . 
     Thereby, in the state where the toner box  9 M is located at the separable position, the upper wall of the apparatus main body  2  is not located downstream of the toner box  9 M located at the separable position with respect to the separation direction of the toner box  9 M from the apparatus main body  2 . For this reason, the toner box  9 M can be separated from the apparatus main body  2  in the state where the toner box  9 M is located at the separable position. 
     3.4 Second Support Part 
     As shown in  FIG.  8   , the apparatus main body  2  is configured to support the plurality of toner boxes  9 K,  9 Y,  9 M,  9 C so that each of the plurality of toner boxes  9 K,  9 Y,  9 M,  9 C can move. The apparatus main body  2  further includes a plurality of second support part  27 K (not shown),  27 Y (not shown),  27 M and  27 C (not shown). The plurality of second support part  27 K (not shown),  27 Y (not shown),  27 M and  27 C (not shown) has the same structure. Therefore, in the below, the second support part  27 M is described, and the descriptions of the second support parts  27 K,  27 Y,  27 C are omitted. 
     The second support part  27 M is configured to support the toner box  9 M. The second support part  27 M is located above the first support part  26 . The second support part  27 M is supported to the first wall  20 . The second support part  27 M has a rotary shaft  34  and a second accommodation frame  33 . 
     The rotary shaft  34  extends in the alignment direction. The rotary shaft  34  is rotatably supported to the first wall  20 . 
     The second accommodation frame  33  can accommodate therein the toner box  9 M. The second accommodation frame  33  has a third side frame  33 A, a fourth side frame  33 B, and a mounting/demounting opening  33 C. 
     The third side frame  33 A is located at one end of the second accommodation frame  33  in the axis direction. The fourth side frame  33 B is located at the other end of the second accommodation frame  33  in the axis direction. The third side frame  33 A is located at an opposite side to the first wall  20  with respect to the housing  91 , in the state where the toner box  9 M is located at the coupling position. The fourth side frame  33 B is located between the housing  91  and the first wall  20  in the state where the toner box  9 M is located at the coupling position. Each of the third side frame  33 A and the fourth side frame  33 B extends in the vertical direction in the state where the toner box  9 M is located at the coupling position. The third side frame  33 A is configured to close an upper part of the second opening  21 A in the state where the toner box  9 M is located at the coupling position. 
     The mounting/demounting opening  33 C is formed to allow the toner box  9 M to pass therethrough when mounting and demounting the toner box  9 M to and from the second accommodation frame  33 . The mounting/demounting opening  33 C is defined between an upper end of the third side frame  33 A and an upper end of the fourth side frame  33 B. 
     The second accommodation frame  33  is mounted to the rotary shaft  34 . Specifically, a lower end portion of the second accommodation frame  33  is fixed to the rotary shaft  34 . Thereby, the toner box  9 M rotates about the rotary shaft  34  in the state where it is supported to the second support part  27 M. That is, a rotation support point of the toner box  9 M is the rotary shaft  34  and is supported to the first wall  20 . 
     As shown in  FIG.  9   , when the toner box  9 M is moved from the coupling position (refer to  FIG.  8   ) to the decoupling position, the second accommodation frame  33  is tilted so as to be distant from the first wall  20  about the rotary shaft  34 , which is a support point. In the state where the toner box  9 M is located at the decoupling position, the toner box  9 M overlaps the upper wall of the apparatus main body  2  in the separation direction from the apparatus main body  2 , specifically, in the extension direction of the third side frame  33 A. For this reason, in the state where the toner box  9 M is located at the decoupling position, the toner box  9 M cannot be separated from the second support part  27 M. 
     As shown in  FIG.  10 B , when the toner box  9 M is moved from the decoupling position (refer to  FIG.  9   ) to the separable position, the second accommodation frame  33  is tilted so as to be more distant from the first wall  20  than at the decoupling position (refer to  FIG.  9   ) about the rotary shaft  34 , which is a support point. In the state where the toner box  9 M is located at the separable position, the toner box  9 M does not overlap the upper wall of the apparatus main body  2  in the separation direction from the apparatus main body  2 , specifically, in the extension direction of the third side frame  33 A. Also, the mounting/demounting opening  33 C is exposed from the upper part of the second opening  21 A. For this reason, the toner box  9 M can be separated from the second accommodation frame  33  through the mounting/demounting opening  33 C and the second opening  21 A. 
     Also, when the waste toner box  5  is located at the first position and the toner box  9 M is moved from the coupling position (refer to  FIG.  8   ) to the decoupling position (refer to  FIG.  9   ) or the separable position, the third side frame  33 A comes in contact with the movable frame  31 C. For this reason, the movable frame  31 C swings to be distant from the first wall  20  about a lower end of the movable frame  31 C, which is a support point, in association with movement of the second accommodation frame  33 . 
     3.5 First Pressing Unit 
     Also, as shown in  FIG.  7   , the image forming apparatus  1  further includes a plurality of first pressing units  28 A,  28 B, a plurality of second pressing units  29 K,  29 Y,  29 M,  29 C, a first link member  7 , a first guide  37 , a second guide  38 , a coupling part  81 , a second link member  8 , and a third guide  39 . 
     The first pressing units  28 A,  28 B are configured to press the waste toner box  5  so that the waste toner box  5  is to face from the first position toward the second position (refer to  FIG.  8   ). The first pressing units  28 A,  28 B are located with being spaced from each other in the alignment direction. The first pressing units  28 A,  28 B are arranged in the first guide  37 . The first guide  37  will be described later. Also, the first pressing units  28 A,  28 B have the same structure. Therefore, in the below, the first pressing unit  28 A is described, and the description of the first pressing unit  28 B is omitted. 
     As shown in  FIG.  8   , the first pressing unit  28 A is located at an opposite side to the first accommodation frame  31  with respect to the first wall  20 , in the axis direction. The first pressing unit  28 A is located at an opposite side to the box main body  52  with respect to the second side frame  31 B, in the axis direction. The first pressing unit  28 A is located between the coupling part  50 M and the rotary shaft  32  in the vertical direction in the state where the waste toner box  5  is located at the first position. The first pressing unit  28 A has a spring  23  and a first contact part  35 . That is, the image forming apparatus  1  includes the spring  23 . 
     The spring  23  is provided to press the waste toner box  5  from the first position toward the second position (refer to  FIG.  9   ). The spring  23  is located between the coupling part  50 M and the rotary shaft  32 , in the state where the waste toner box  5  is located at the first position. In other words, the spring  23  is located between the coupling part  50 M and the rotation support point of the waste toner box  5  in the vertical direction in the state where the waste toner box  5  is located at the first position. For this reason, it is possible to effectively arrange the spring  23 . 
     The first contact part  35  is in contact with the second side frame  31 B through a third hole  20 C of the first wall  20 . The first contact part  35  is pressed toward the second side frame  31 B by the spring  23 . The first contact part  35  has a cylindrical shape. The first contact part  35  extends in the axis direction. The first contact part  35  is configured to accommodate therein the spring  23 . 
     3.6 Second Pressing Unit 
     As shown in  FIG.  7   , the plurality of second pressing units  29 K,  29 Y,  29 M,  29 C is configured to press the plurality of toner boxes  9 K,  9 Y,  9 M,  9 C so that the plurality of toner boxes  9 K,  9 Y,  9 M,  9 C is to face from the coupling position (refer to  FIG.  8   ) toward the decoupling position (refer to  FIG.  9   ). The plurality of second pressing units  29 K,  29 Y,  29 M,  29 C is located with being spaced from each other in the alignment direction. The plurality of second pressing units  29 K,  29 Y,  29 M,  29 C is arranged in the second guide  38 . The second guide  38  will be described later. The plurality of second pressing units  29 K,  29 Y,  29 M,  29 C has the same structure. Therefore, in the below, the second pressing unit  29 M is described, and the descriptions of the plurality of second pressing units  29 K,  29 Y,  29 C are omitted. 
     As shown in  FIG.  8   , the second pressing unit  29 M is located at an opposite side to the second accommodation frame  33  with respect to the first wall  20 , in the axis direction. The second pressing unit  29 M is located at an opposite side to the housing  91  with respect to the fourth side frame  33 B, in the axis direction. The second pressing unit  29 M is located between the supply unit  90  and the rotary shaft  34  in the vertical direction, in the state where the toner box  9 M is located at the coupling position. The second pressing unit  29 M has a second spring  25  and a second contact part  36 . 
     The second spring  25  is provided to press the toner box  9 M from the coupling position toward the decoupling position (refer to  FIG.  9   ). The second spring  25  is located between the supply unit  90  and the rotation support point of the toner box  9 M, in the state where the toner box  9 M is located at the coupling position. 
     The second contact part  36  is in contact with the fourth side frame  33 B through a fourth hole  20 D of the first wall  20 . The second contact part  36  is pressed toward the fourth side frame  33 B by the second spring  25 . The second contact part  36  has a cylindrical shape. The second contact part  36  extends in the axis direction. The second contact part  36  is configured to accommodate therein the second spring  25 . 
     3.7 First Link Member 
     The first link member  7  is configured to interlink movement of the cover  2 B and pressing and press-releasing of the spring  23  with respect to the waste toner box  5 . The first link member  7  is configured to restrain the pressing of the spring  23  to the waste toner box  5  in a state where the cover  2 B is located at the closing position. The first link member  7  allows the spring  23  to press the waste toner box  5  when the cover  2 B is moved from the closing position to the opening position (refer to  FIG.  9   ). For this reason, when the cover  2 B is moved from the closing position to the opening position, the waste toner box  5  can be securely located at the second position. 
     Also, the first link member  7  is configured to interlink movement of the cover  2 B and pressing and press-releasing of the second spring  25  with respect to the toner box  9 M. The first link member  7  is configured to restrain the pressing of the second spring  25  to the toner box  9 M in a state where the cover  2 B is located at the closing position. The first link member  7  allows the second spring  25  to press the toner box  9 M when the cover  2 B is moved from the closing position to the opening position (refer to  FIG.  9   ). 
     As shown in  FIG.  7   , the first link member  7  has a first part  77 , a second part  78 , a connection part  79 , and a first boss  80 . 
     3.7.1 First Part 
     The first part  77  extends in the alignment direction. The first part  77  is located at an opposite side to the first accommodation frame  31  with respect to the first wall  20  in the axis direction (refer to  FIG.  8   ). The first part  77  is located below the discharge part  41  in the state where the drawer  3  is located at the inner position. The first part  77  has a plurality of first through-openings  82 A,  82 B, and a plurality of first cams  83 A,  83 B (refer to  FIG.  13   ). 
     The plurality of first through-openings  82 A,  82 B is located with being spaced from each other in the alignment direction. The plurality of first through-openings  82 A,  82 B has the same structure. Therefore, in the below, the first through-opening  82 A is described, and the description of the first through-opening  82 B is omitted. 
     The first through-opening  82 A is formed to receive the first contact part  35  of the first pressing unit  28 A. The first through-opening  82 A extends in the alignment direction. The first through-opening  82 A has one end and the other end in the alignment direction. The first contact part  35  is located at one end of the first through-opening  82 A in the state where the cover  2 B is located at the closing position. The first contact part  35  is located at the other end of the first through-opening  82 A in the state where the cover  2 B is located at the opening position (refer to  FIG.  12   ). 
     As shown in  FIG.  13   , the plurality of first cams  83 A,  83 B is located with being spaced from each other in the alignment direction. The plurality of first cams  83 A,  83 B has the same structure. Therefore, in the below, the first cam  83 A is described, and the description of the first cam  83 B is omitted. The first cam  83 A is located at an opposite side to the first wall  20  with respect to the first part  77  (refer to  FIG.  8   ). The first cam  83 A is configured to surround one end of the first through-opening  82 A. The first cam  83 A protrudes from one end edge of the first through-opening  82 A of the first part  77  in the axis direction. The first cam  83 A has an inclined surface S 1 . The inclined surface S 1  is inclined to intersect with the axis direction. 
     As shown in  FIG.  8   , the first cam  83 A is in contact with the first contact part  35  in the state where the cover  2 B is located at the closing position. Thereby, the first contact part  35  separates from the first accommodation frame  31  in the axis direction, against a pressing force of the spring  23 . For this reason, the pressing of the spring  23  to the waste toner box  5  is restrained. 
     As shown in  FIG.  9   , the first cam  83 A is in contactless with the first contact part  35  in the state where the cover  2 B is located at the opening position. Thereby, the first contact part  35  comes in contact with the first accommodation frame  31  by the pressing force of the spring  23 , thereby pressing the first accommodation frame  31 . For this reason, the restraint on the pressing of the spring  23  to the waste toner box  5  is released. Then, the spring  23  presses the waste toner box  5 . 
     3.7.2 Second Part 
     As shown in  FIG.  7   , the second part  78  extends in the alignment direction. The second part  78  is located at an opposite side to the second accommodation frame  33  with respect to the first wall  20  in the axis direction (refer to  FIG.  8   ). The second part  78  is located at an opposite side to the first part  77  with respect to the discharge part  41 , in the state where the drawer  3  is located at the inner position. The second part  78  is located between the discharge part  41  and the receiving part  43 , in the state where the drawer  3  is located at the inner position. The second part  78  has a plurality of second through-openings  84 K,  84 Y,  84 M,  84 C, and a plurality of second cams  85 K,  85 Y,  85 M,  85 C (refer to  FIG.  13   ). 
     The plurality of second through-openings  84 K,  84 Y,  84 M,  84 C is located with being spaced from each other in the alignment direction. The plurality of second through-openings  84 K,  84 Y,  84 M,  84 C has the same structure. Therefore, in the below, the second through-opening  84 M is described, and the descriptions of the second through-openings  84 K,  84 Y,  84 C are omitted. The second through-opening  84 M is formed to receive the second contact part  36  of the second pressing unit  29 M. The second through-opening  84 M extends in the alignment direction. The second through-opening  84 M has one end and the other end in the alignment direction. The second contact part  36  is located at one end of the second through-opening  84 M in the state where the cover  2 B is located at the closing position. The second contact part  36  is located at the other end of the second through-opening  84 M in the state where the cover  2 B is located at the opening position (refer to  FIG.  12   ). 
     As shown in  FIG.  13   , the plurality of second cams  85 K,  85 Y,  85 M,  85 C is located at an opposite side to the first wall  20  with respect to the second part  78  (refer to  FIG.  8   ). The plurality of second cams  85 K,  85 Y,  85 M,  85 C is located with being spaced from each other in the alignment direction. The plurality of second cams  85 K,  85 Y,  85 M,  85 C has the same structure. Therefore, in the below, the second cam  85 M is described, and the descriptions of the second cams  85 K,  85 Y,  85 C are omitted. 
     The second cam  85 M is configured to surround one end of the second through-opening  84 M. The second cam  85 M protrudes from one end edge of the second through-opening  84 M of the second part  78  in the axis direction. The second cam  85 M has an inclined surface S 2 . The inclined surface S 2  is inclined to intersect with the axis direction. 
     As shown in  FIG.  8   , the second cam  85 M is in contact with the second contact part  36  in the state where the cover  2 B is located at the closing position. Thereby, the second contact part  36  separates from the second accommodation frame  33  in the axis direction, against a pressing force of the second spring  25 . For this reason, the pressing of the second spring  25  to the toner box  9 M is restrained. 
     As shown in  FIG.  9   , the second cam  85 M is in contactless with the second contact part  36  in the state where the cover  2 B is located at the opening position. Thereby, the second contact part  36  comes in contact with the second accommodation frame  33  by the pressing force of the second spring  25 , thereby pressing the second accommodation frame  33 . For this reason, the restraint on the pressing of the second spring  25  to the toner box  9 M is released. Then, the second spring  25  presses the toner box  9 M. 
     3.7.3 Connection Part and Boss 
     As shown in  FIG.  13   , the connection part  79  is configured to interconnect the first part  77  and the second part  78 . The connection part  79  extends in the vertical direction. The connection part  79  is located with being spaced from the cover  2 B in the alignment direction. The connection part  79  has a receiving hole  86 . The receiving hole  86  is formed to receive a second boss  89  of the second link member  8 . The second boss  89  will be described later. 
     The first boss  80  extends in the axis direction. The first boss  80  is fixed to the connection part  79 . 
     3.7.4 Coupling Part 
     The coupling part  81  is configured to couple the cover  2 B and the first link member  7  each other. The coupling part  81  is arranged in alignment with the connection part  79  in the axis direction. The coupling part  81  has a circular arc shape of which a center is the rotation support point of the cover  2 B. The coupling part  81  is fixed to the cover  2 B. The coupling part  81  has a long hole  87 . The long hole  87  is formed to receive the first boss  80 . The long hole  87  extends in a rotating direction of the cover  2 B. The long hole  87  has one end  87 A and the other end  87 B in an extension direction of the long hole  87 . The other end  87 B of the long hole  87  is located at an opposite side to the cover  2 B with respect to one end  87 A of the long hole  87  in the extension direction of the long hole  87 . The first boss  80  is located at one end  87 A of the long hole  87  in the state where the cover  2 B is located at the closing position. The first boss  80  is located at the other end  87 B of the long hole  87  in the state where the cover  2 B is located at the opening position (refer to  FIG.  12   ). 
     3.8 First Guide and Second Guide 
     As shown in  FIG.  7   , the first guide  37  guides the first part  77  when the cover  2 B is moved between the closing position and the opening position. The first guide  37  extends in the alignment direction. The first guide  37  is configured to slidably accommodate the first part  77 . The first guide  37  is fixe to the first wall  20 . The second guide  38  guides the second part  78  when the cover  2 B is moved between the closing position and the opening position. The second guide  38  extends in the alignment direction. The second guide  38  is configured to slidably accommodate the second part  78 . The second guide  38  is located with being spaced upward from the first guide  37 . 
     3.8 Second Link Member and Third Guide 
     The second link member  8  is configured to interlink movement of the cover  2 B and movement of the drawer  3 . The drawer  3  is configured to be movable between the contact position (refer to  FIG.  1   ) and the spaced position (refer to  FIG.  12   ) in the state where the drawer is located at the inner position. In the state where the drawer  3  is located at the contact position, the photosensitive drums  40  of the plurality of cartridges  4 K,  4 Y,  4 M,  4 C are in contact with the belt unit  6  (refer to  FIG.  1   ). In the state where the drawer  3  is located at the spaced position, the photosensitive drums  40  of the plurality of cartridges  4  are spaced from the belt unit  6  (refer to  FIG.  12   ). In the state where the cover  2 B is located at the closing position, the second link member  8  locates the drawer  3  at the contact position (refer to  FIG.  1   ). The second link member  8  moves the drawer  3  from the contact position to the spaced position (refer to  FIG.  12   ) when the cover  2 B is moved from the closing position to the opening position. For this reason, when the cover  2 B is moved from the closing position to the opening position, it is possible to securely space the drawer  3  from the belt unit  6 . As a result, it is possible to secure smooth movement of the drawer  3 . 
     As shown in  FIG.  14   , the second link member  8  is located between the first part  77  and the second part  78  in the vertical direction (refer to  FIG.  7   ). The second link member  8  has a link main body  88  and a second boss  89 . 
     3.8.1 Link Main Body  88   
     The link main body  88  extends in the alignment direction. The link main body  88  is located at an opposite side to the coupling part  81  with respect to the first link member  7  in the axis direction. The link main body  88  is located below the drawer  3  in the state where the drawer  3  is located at the inner position (refer to  FIG.  8   ). An upper surface of the link main body  88  is in contact with the drawer  3  in the state where the drawer  3  is located at the inner position (refer to  FIG.  8   ). A lower surface of the link main body  88  has a first surface  88 A, a second surface  88 B, a third surface  88 C, a fourth surface  88 D, and a fifth surface  88 E. 
     The first surface  88 A is located at an end portion of the lower surface of the link main body  88  facing toward the cover  2 B. The first surface  88 A extends in the alignment direction. The second surface  88 B is located at an opposite side to the cover  2 B with respect to the first surface  88 A. The second surface  88 B is inclined to intersect with the vertical direction. The second surface  88 B has one end and the other end in the alignment direction. One end of the second surface  88 B continues to the first surface  88 A. The other end of the second surface  88 B is located at a position lower than one end of the second surface  88 B. The other end of the second surface  88 B continues to the third surface  88 C. 
     The third surface  88 C is located at an opposite side to the cover  2 B with respect to the second surface  88 B. The third surface  88 C extends in the alignment direction. The fourth surface  88 D is located at an opposite side to the cover  2 B with respect to the third surface  88 C. The fourth surface  88 D is inclined to intersect with the vertical direction. The fourth surface  88 D has one end and the other end in the alignment direction. One end of the fourth surface  88 D continues to the third surface  88 C. The other end of the fourth surface  88 D is located at a position lower than one end of the fourth surface  88 D. The other end of the fourth surface  88 D continues to the fifth surface  88 E. The fifth surface  88 E is located at an opposite side to the cover  2 B with respect to the fourth surface  88 D. The fifth surface  88 E extends in the alignment direction. 
     3.8.2 Second Boss 
     Also, when the cover  2 B is moved from the closing position to the opening position, the first link member  7  and the second link member  8  are coupled with each other so that the first link member  7  first allows the spring  23  to press the waste toner box  5  and then the second link member  8  moves the drawer  3  from the contact position to the spaced position. For this reason, when the cover  2 B is moved from the closing position to the opening position, the waste toner box  5  is first located at the first position, so that the coupling part  50 M and the discharge part  41  can be decoupled and then the drawer  3  can be moved from the contact position to the spaced position. 
     Specifically, the second boss  89  is inserted in the receiving hole  86 . Thereby, the second link member  8  is coupled with the first link member  7 . The second boss  89  is fixed to the link main body  88 . The second boss  89  extends in the axis direction. 
     3.9 Third Guide 
     When the cover  2 B is moved between the closing position and the opening position, the third guide  39  guides the second link member  8 . The third guide  39  is located below the second link member  8 . 
     The third guide  39  extends in the alignment direction. The third guide  39  is fixed to the apparatus main body  2 . An upper surface of the third guide  39  is in contact with a lower surface of the link main body  88 . The upper surface of the third guide  39  has a first guide surface  39 A, a second guide surface  39 B, a third guide surface  39 C, a fourth guide surface  39 D, and a fifth guide surface  39 E. 
     The first guide surface  39 A is located at an end portion of the upper surface of the third guide  39  facing toward the cover  2 B. The first guide surface  39 A extends in the alignment direction. The first guide surface  39 A is in contact with the first surface  88 A in the state where the cover  2 B is located at the closing position. The first guide surface  39 A is in contact with the third surface  88 C in the state where the cover  2 B is located at the opening position (refer to  FIG.  12   ). 
     The second guide surface  39 B is located at an opposite side to the cover  2 B with respect to the first guide surface  39 A. The second guide surface  39 B is inclined to intersect with the vertical direction. The second guide surface  39 B has one end and the other end in the alignment direction. One end of the second guide surface  39 B continues to the first guide surface  39 A. The other end of the second guide surface  39 B is located at a position lower than one end of the second guide surface  39 B. The other end of the second guide surface  39 B continues to the third guide surface  39 C. The second guide surface  39 B faces the second surface  88 B in the alignment direction, in the state where the cover  2 B is located at the closing position. The second guide surface  39 B comes in contact with the second surface  88 B when the cover  2 B is moved between the closing position and the opening position. 
     The third guide surface  39 C is located at an opposite side to the cover  2 B with respect to the second guide surface  39 B. The third guide surface  39 C extends in the alignment direction. The third guide surface  39 C is in contact with the third surface  88 C in the state where the cover  2 B is located at the closing position. The third guide surface  39 C is in contact with the fifth surface  88 E in the state where the cover  2 B is located at the opening position (refer to  FIG.  12   ). 
     The fourth guide surface  39 D is located at an opposite side to the cover  2 B with respect to the third guide surface  39 C. The fourth guide surface  39 D is inclined to intersect with the vertical direction. The fourth guide surface  39 D has one end and the other end in the alignment direction. One end of the fourth guide surface  39 D continues to the third guide surface  39 C. The other end of the fourth guide surface  39 D is located at a position lower than one end of the fourth guide surface  39 D. The other end of the fourth guide surface  39 D continues to the fifth guide surface  39 E. The fourth guide surface  39 D faces the fourth surface  88 D in the alignment direction, in the state where the cover  2 B is located at the closing position. The fourth guide surface  39 D comes in contact with the fourth surface  88 D when the cover  2 B is moved between the closing position and the opening position. 
     The fifth guide surface  39 E is located at an opposite side to the cover  2 B with respect to the fourth guide surface  39 D. The fifth guide surface  39 E extends in the alignment direction. The fifth guide surface  39 E is in contact with the fifth surface  88 E in the state where the cover  2 B is located at the closing position. 
     4. Operations of Waste Toner Box, Toner Box and Drawer 
     Subsequently, operations of the waste toner box  5 , the toner box  9 M and the drawer  3  are described with reference to  FIGS.  2 ,  9  to  10 B and  12   . 
     As shown in  FIG.  12   , when the cover  2 B is moved from the closing position to the opening position, the other end  87 B of the long hole  87  comes in contact with the first boss  80 . Then, the first link member  7  is moved toward the opening  2 A in the alignment direction, and the second link member  8  is moved toward the opening  2 A in the alignment direction. 
     Then, as shown in  FIG.  9   , the contact between the first contact part  35  and the first cam  83 A is first released by the movement of the first link member  7 . Then, the first contact part  35  is brought into contact with the first accommodation frame  31  by the pressing force of the spring  23 , thereby pressing the first accommodation frame  31 . That is, the first link member  7  allows the spring  23  to press the waste toner box  5 . Thereby, the waste toner box  5  is moved from the first position to the second position. 
     At this time, the contact between the second contact part  36  and the second cam  85 M is released by the movement of the first link member  7 . Then, the second contact part  36  is brought into contact with the second accommodation frame  33  by the pressing force of the second spring  25 , thereby pressing the second accommodation frame  33 . Thereby, the toner box  9 M is moved from the coupling position to the decoupling position. 
     Then, as shown in  FIG.  12   , the third surface  88 C is brought into contact with the first guide surface  39 A and the fifth surface  88 E is brought into contact with the third guide surface  39 C by the movement of the second link member  8 . Thereby, the second link member  8  is moved upward, and the drawer  3  is moved from the contact position to the spaced position. 
     Thereafter, as shown in  FIG.  2   , when the drawer  3  supporting the plurality of cartridges  4 K,  4 Y,  4 M,  4 C is moved from the inner position to the outer position, a user can mount and demount the plurality of cartridges  4 K,  4 Y,  4 M,  4 C to and from the drawer  3 . 
     Also, as shown in  FIG.  10 A , in order to separate the waste toner box  5  from the apparatus main body  2 , the user rotates the first accommodation frame  31  to locate the waste toner box  5  at the third position. Thereby, the user can mount and demount the waste toner box  5  to and from the first accommodation frame  31 . In the meantime, in the state where the waste toner box  5  is located at the third position, the toner box  9 M may be located at the coupling position or the decoupling position. 
     Also, as shown in  FIG.  10 B , in order to separate the toner box  9 M from the apparatus main body  2 , the user rotates the second accommodation frame  33  to locate the toner box  9 M at the separable position. Thereby, the user can mount and demount the toner box  9 M to and from the second accommodation frame  33 . In the meantime, in the state where the toner box  9 M is located at the separable position, the waste toner box  5  may be located at the first position or the second position. 
     5. Advantages 
     As shown in  FIG.  8   , in the state where the waste toner box  5  is located at the first position, the plurality of coupling parts  50 K,  50 Y,  50 M,  50 C can receive the waste toner from the plurality of discharge parts  41  (refer to  FIG.  7   ). 
     For this reason, the drawer  3  can accommodate the waste toner from the plurality of photosensitive drum  40  into the waste toner box  5  without a member configured to collect the waste toner from the plurality of discharge parts  41  and to convey the same into the waste toner box  5 . 
     Also, as shown in  FIG.  9   , in the state where the waste toner box  5  is located at the second position, the plurality of coupling parts  50 K,  50 Y,  50 M,  50 C and the plurality of discharge parts  41  are decoupled (refer to  FIG.  7   ). As a result, it is possible to secure the smooth movement of the drawer  3  while accommodating the waste toner from the plurality of photosensitive drums  40  into the waste toner box  5 .