JP2010079141A - Image forming apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image forming apparatus having a state wherein a door member can be closed and a state wherein the door member cannot be closed, which are selected with simple constitution, when a transfer means and a predetermined rotary body are released from being in press contact with each other. <P>SOLUTION: The image forming apparatus includes: a release mechanism K which releases the transfer means (transfer belt 100) for transferring an image and the predetermined rotary body (transfer roller 101) from being in press contact with each other when photosensitive members (photoreceptor cartridges 3Y, 3M, 3C, and 3B) are attached or detached; a release lever L coupled to a rotary shaft 20 of the release mechanism and operated to release the press contact state; a guide means (guide groove 4) holding the release lever at one of an operable position P1, an inoperable position P2, and a transport position P3 when the release lever is rotated; and a projection 2a provided at the door member 2 and interfering with a portion of the release lever when the release lever is held at the inoperable position to prevent the door member from being closed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an image forming apparatus.

  An image forming apparatus such as a printer is provided with a release mechanism (retract mechanism) that releases a pressure contact state (nip) between a transfer belt and a predetermined roller when a photosensitive cartridge is attached or detached.

  Further, one or two release levers that are connected to a rotation shaft provided in the release mechanism and operate to release the pressure contact state are provided at predetermined positions.

  By the way, when the release lever is in the release position, the transfer belt and the predetermined roller are in a separated state, and image formation cannot be executed. Therefore, when the release lever is in the release position, the projection provided on the cover (door member) and the release lever interfere with each other so that the cover does not close. I try not to let you.

  On the other hand, at the time of shipment or transportation of the image forming apparatus, there is a demand for shipping in a state in which the pressure contact state between the transfer belt and a predetermined roller is released in order to prevent deformation or deterioration of the components. With this configuration, there is a possibility that the cover is not closed and an unstable state is caused during transportation.

  Various techniques have been proposed to solve such problems.

For example, in Japanese Patent Application Laid-Open No. 2003-167469, when the pressure release lever is in a horizontal position, the pressure roller is in pressure contact with the fixing roller of the fixing device, and when the lever is inclined, the pressure is released. Even if the door of the main body provided for maintenance of the fixing device is closed when the is in the above position, the interference member provided on the door interferes with the lever, and a bar is inserted into the through hole of the door to rotate the interference member. If this is done, interference with the lever is avoided, so a configuration is disclosed in which the door can be completely closed.
JP 2003-167469 A

  According to the present invention, in a state in which the press contact state between the transfer unit and the predetermined rotating body is released, a state in which the door member can be closed and a state in which the door member cannot be closed can be selected with a simple configuration. An object is to provide an apparatus.

  In order to solve the above problems, an image forming apparatus according to the invention of claim 1 includes a release mechanism that releases a pressure contact state between a transfer unit that transfers an image and a predetermined rotating body when the photosensitive member is attached and detached. A release lever that is connected to a rotation shaft provided in the release mechanism and operates to release the pressure contact state, and when the release lever is rotated, any one of three positions: an operable position, an operation prohibited position, and a transport position A guide member that is held at the position, a door member that is opened and closed when the photosensitive member is attached and detached, and provided on the door member, when the release lever is held at the operation prohibited position, It has a projection part which interferes with a part and prevents obstruction of the door member concerned.

  According to a second aspect of the present invention, there is provided an image forming apparatus according to the first aspect of the present invention, wherein the release lever is connected to the rotating shaft in a state where the pressure contact state is maintained when the release lever is held at the operable position. Maintaining the connection with the rotating shaft in a state in which the pressure contact state is released when held in the operation prohibiting position, and in the state in which the pressure contact state is released when held in the transport position. A variable connection mechanism for releasing the connection with the rotation shaft is provided.

  According to a third aspect of the present invention, there is provided the image forming apparatus according to the second aspect, wherein the variable coupling mechanism is slidably contacted with a circumferential surface of the rotary shaft having an engagement portion on a circumference. And an urging means for urging the slider to the rotating shaft, and the slider is engaged with and engaged with an engaging portion of the rotating shaft at the operable position and the operation prohibiting position. And a restricting member that moves to a state in which the slider can move from the engaging portion of the rotating shaft in contact with the circumferential portion at the transport position.

  According to a fourth aspect of the present invention, there is provided the image forming apparatus according to the third aspect, wherein the restricting member includes the sliding member in a state in which the slider is engaged and coupled with the engaging portion of the rotating shaft. It is configured by a protrusion that is engaged with a moving element and is disengaged from the slider while being movable in contact with a circumferential portion from an engaging portion of the rotating shaft. .

  According to a fifth aspect of the present invention, there is provided an image forming apparatus according to the third aspect of the present invention, and the fourth aspect of the present invention, wherein the protrusion is formed integrally with the release lever and the slider. It is characterized in that it is provided at the tip of a claw portion that can be swung in the direction in which the engagement is released.

  According to a sixth aspect of the present invention, in the image forming apparatus according to the second aspect of the present invention, the variable coupling mechanism includes an engaging portion formed at an end portion of the rotating shaft, the operable position, and the operation prohibition. An engagement member that is engaged and connected to the engagement portion at a position, and is capable of advancing and retreating in an axial direction so that the engagement with the engagement portion is released at the transport position; It is comprised from the biasing means biased to the front end side of a shaft, It is characterized by the above-mentioned.

  According to the present invention, the following effects can be obtained.

  That is, according to the first aspect of the present invention, when the release lever is held at the operation prohibiting position, even if the door member is not closed, the transportation is not performed. In the position, the door member can be closed.

  According to invention of Claim 2, compared with the case where it does not have this structure, the connection of the rotating shaft of a cancellation | release mechanism and a cancellation | release lever can be maintained and cancelled | released with a simple structure.

  According to invention of Claim 3, compared with the case where it does not have this structure, maintenance and cancellation | release of the connection of the rotating shaft of a cancellation | release mechanism and a cancellation | release lever are realizable with a simple structure.

  According to the fourth aspect of the present invention, it is possible to realize the maintenance and release of the connection between the rotation shaft of the release mechanism and the release lever with a simpler configuration than when the present configuration is not provided. .

  According to the fifth aspect of the present invention, it is possible to maintain and release the connection between the rotary shaft of the release mechanism and the release lever with a simpler and less expensive configuration than when the present configuration is not provided. Can do.

  According to the sixth aspect of the present invention, it is possible to achieve the maintenance and release of the connection between the rotation shaft of the release mechanism and the release lever with a simple configuration as compared with the case where this configuration is not provided.

  Hereinafter, an embodiment as an example of the present invention will be described in detail with reference to the drawings. Here, in the accompanying drawings, the same reference numerals are given to the same members, and duplicate descriptions are omitted. In addition, since description here is the best form by which this invention is implemented, this invention is not limited to the said form.

  (First embodiment)

  A printer PR1 as an image forming apparatus according to a first embodiment of the present invention will be described with reference to FIGS.

  Although not particularly limited, it is assumed that the printer PR1 as the image forming apparatus shown in the present embodiment is a full-color printer.

  A full-color printer, for example, prints using four color toners of yellow (Y), magenta (M), cyan (C), and black (B) based on image data sent from a personal computer, a scanner, or the like. It is configured to perform an operation.

  A schematic configuration of the printer PR1 will be described with reference to FIG. Note that in the configuration of the printer PR1, the description of the portions not related to the present invention is omitted.

  In the printer PR1, a housing 1 for printing paper as a recording medium, a printing paper transport mechanism, an image forming unit for forming an image on the printing paper, and the like are housed in a resin casing 1.

  Here, the image forming unit includes four image forming units that form toner images of respective colors of yellow (Y), magenta (M), cyan (C), and black (B).

  The four image forming units are configured in the same manner except for the color of the image to be formed. A photosensitive drum (photosensitive member: photosensitive cartridge 300Y, 300M, 300C, 300B) that rotates at a predetermined rotation speed, and this A charging roller for primary charging that uniformly charges the surface of the photosensitive drum, an exposure device that exposes an image corresponding to each color on the surface of the photosensitive drum to form an electrostatic latent image, and a photosensitive drum A developing device that develops the electrostatic latent image formed on the photosensitive drum with a corresponding color toner, a cleaning device that cleans the transfer residual toner remaining on the photosensitive drum, and a toner replenishing device that replenishes the developing device with toner. It is configured.

  Note that toner cartridges 3Y, 3M, 3C, and 3B are detachably provided above the photoreceptor cartridges 300Y, 300M, 300C, and 300B.

  The developing device supplies, for example, a two-component developer or a one-component developer contained therein to the developing roller while stirring, and regulates the layer thickness of the developer supplied to the developing roller, The electrostatic latent image is conveyed to an opposing development area and formed on the surface of the photosensitive drum, and is developed with toner of a predetermined color.

  In addition, a control unit is disposed inside the housing 1, and this control unit is provided with, for example, an image processing apparatus that performs predetermined image processing on image data.

  From this image processing apparatus, image data of each color of yellow (Y), magenta (M), cyan (C), and black (B) is sequentially output to the exposure apparatus, and is emitted from this exposure apparatus in accordance with the image data. These four laser beams are scanned and exposed on the respective photosensitive drums to form electrostatic latent images.

  The electrostatic latent image formed on each photosensitive drum is developed as a toner image of each color of yellow (Y), magenta (M), cyan (C), and black (B) by a developing device, respectively. It has become.

  On the other hand, a door member (cover) 2 that can be manually opened and closed is provided on one side surface (front surface in FIG. 1) of the housing 1.

  Further, on the back surface side of the door member 2, two protrusions 2 a are provided that hit a part of a lever member L described later and prevent the door member 2 from being closed on the housing 1 side.

  The number of the protrusions 2a is not limited to two, and may be one or three or more depending on the size of the door member 2 or the like.

  Various members and devices are arranged in the opening portion S of the housing 1 exposed when the door member 2 is opened.

  For example, four-color photosensitive cartridges 300Y, 300M, 300C, and 300B that are attached and detached through the opening S, transfer means (transfer belt 100: see FIG. 3) for transferring an image, and a predetermined rotating body (transfer roller 101). : Release mechanism K (see FIG. 3) for releasing the pressure contact state with the release mechanism L (see FIG. 3), and a release lever L that is connected to the rotary shaft 20 (see FIG. 4 etc.) provided in the release mechanism K and operates to release the pressure contact state Etc. are provided.

  Before describing the configuration of the release lever L, the schematic configuration of the release mechanism K will be described with reference to FIG.

  The transfer belt 100 and the transfer roller 101 need to be in a pressure-contact (nip) state when executing image formation. However, when the printer PR1 itself is transported, the photosensitive cartridges 300Y, 300M, 300C, and 300B are replaced. In doing so, it is necessary to release the pressure contact state in order to prevent damage to the member.

  Therefore, as shown in FIG. 3, a release mechanism K is provided that lifts and lowers the pressure contact member 102 by a rotatable cam member 103 to bring the transfer belt 100 and the transfer roller 101 into pressure contact or release.

  That is, in FIG. 3, when the rotation shaft 20 is rotated in the direction of arrow A by the operation of the release lever L and the cam member 103 is in the solid line state, the pressure contact member 102 is pushed up and the transfer belt 100 and the transfer roller. 101 is held in a pressure contact state.

  On the other hand, when the rotation shaft 20 is rotated in the arrow B direction by the operation of the release lever L and the cam member 103 is in the broken line state, the pressure contact member 102 is lowered and the transfer belt 100 and the transfer roller 101 are pressed against each other. The state is released.

  Note that the pressure contact member 102 may be urged by the spring 104 in the downward direction.

  Next, the configuration and operation of the release lever L will be described with reference to FIGS.

  As shown in FIG. 4, the release lever L is a variable coupling mechanism, which will be described later, on a rotating shaft 20 of the release mechanism K. It is connected via J1 and can rotate in the direction of arrow C along the guide groove (guide means) 4.

  Here, as shown in FIG. 6, when the release lever L is rotated, the guide groove 4 is located at any one of the three positions of the operable position P1, the operation prohibited position P2, and the transport position P3. It comes to hold.

  Here, the operable position P1 refers to a position where the printer PR1 can perform the printing process, and the operation prohibited position P2 refers to replacement of the photosensitive cartridges 300Y, 300M, 300C, 300B, etc. of the printer PR1. Or a position where the printing process cannot be performed for maintenance work, and the transport position P3 refers to a position where the apparatus itself is transported when the printer PR1 is shipped.

  As shown in FIG. 6, a guide element 10 e is formed on the lower surface side of the lever body 10 to be guided by being fitted in the guide groove 4.

  Further, although not particularly limited, when the release lever L is rotated, the operator feels a click at each of the operable position P1, the operation prohibited position P2, and the transport position P3. In order to make sure that the operation is stopped, fitting portions 4a to 4c to which the guide 10e is lightly fitted at each position may be formed.

  Further, the protrusion 2a that prevents the door member 2 from being closed on the housing 1 side interferes with a part of the release lever L when the release lever L is held at the operation prohibiting position P2. 2 is obstructed.

  Next, the variable coupling mechanism J1 will be described.

  First, the tip 20a of the rotating shaft 20 of the release mechanism K has a D-shaped cross section as shown in FIG.

  As shown in FIG. 4B, the variable coupling mechanism J1 that connects the lever body 10 and the rotating shaft 20 of the releasing mechanism K so as to be disengaged is slidably contacted with the peripheral surface of the tip 20a of the rotating shaft 20. The slider 11, the spring (biasing means) 12 that urges the slider 11 against the tip 20 a of the rotating shaft 20, and the slider 11 at the operable position P 1 and the operation prohibited position P 2. Is held in contact with and connected to the flat portion 20a1 of the tip portion 20a of the rotary shaft 20, and the slider 11 is moved from the flat portion 20a1 of the tip portion 20a of the rotary shaft 20 to the circumferential portion 20a2 at the transport position P3. It is comprised from the fixed nail | claw 10b as a control member which transfers to the state which contacts and can move.

  FIG. 5 is a cross-sectional view taken along line AA in FIG. As shown in FIG. 5, the slider 11 is held movably along a groove 10 f partitioned by two wall portions 10 c formed in the lever main body 10. The spring 12 is also accommodated in the groove 10f.

  With the above configuration, as shown in FIG. 4, the release lever L is held in the pressure contact state between the transfer belt 100 and the transfer roller 101 at the operable position P1, and the protrusion 2a and the release lever L interfere with each other. Without this, the door member 2 is in a state that can be closed.

  That is, at the operable position P1, as shown in FIG. 3, the rotary shaft 20 is rotated in the direction of arrow A, the cam member 103 is held in a solid line state, and the press contact member 102 is pushed up to transfer the transfer belt 100 and the transfer roller. 101 is held in a pressure contact state.

  Thus, the printer PR1 is in a state where the door member 2 is closed and the transfer belt 100 and the transfer roller 101 are brought into a pressure contact state so that the printing process can be performed.

  Further, as shown in FIG. 7A, at the operation prohibiting position P2, the transfer belt 100 and the transfer roller 101 are released from the pressure contact state, and the protrusion 2a and the release lever L interfere with each other to cause the door member. 2 will be in the state which cannot be obstruct | occluded.

  That is, at the operation prohibiting position P2, as shown in FIG. 7B, the D-shaped flat portion 20a1 of the tip portion 20a of the rotating shaft 20 and the slider 11 are engaged, and as shown in FIG. The cam member 103 is rotated in the direction of the arrow B and held in a broken line state, and the pressure contact member 102 is lowered to release the pressure contact state between the transfer belt 100 and the transfer roller 101.

  In this state, the protrusion 10b1 of the fixing claw 10b of the release lever L is located behind the slider 11, as shown in FIG. Contact with the end portion keeps the connection between the slider 11 and the rotary shaft 20.

  As a result, the printer PR1 is in a state where the door member 2 cannot be closed, the pressure contact state between the transfer belt 100 and the transfer roller 101 is released, and the photoconductor cartridges 300Y, 300M, 300C, 300B, etc. can be replaced. Then, the maintenance work can be performed.

  Also, as shown in FIG. 8A, at the transport position P3, the transfer belt 100 and the transfer roller 101 are released from the pressure contact state, and the protrusion 2a and the release lever L do not interfere with each other and the door member. 2 will be in the state which can be obstruct | occluded.

  That is, at the transport position P3, as shown in FIG. 8 (b), the engagement between the D-shaped flat portion 20a1 of the tip 20a of the rotating shaft 20 and the slider 11 is released, and the slide 20 is slid by the circumferential portion 20a2. The moving element 11 is pushed up against the urging force of the spring 12.

  In this state, as shown in FIG. 3, the cam member 103 is held in a broken line state, the pressure contact member 102 is lowered, and the state in which the pressure contact state between the transfer belt 100 and the transfer roller 101 is released is maintained.

  As shown in FIG. 8C, which is a cross-sectional view taken along the line CC of FIG. 8B, in this state, the fixing claw 10b of the release lever L uses, for example, the tip of a minus driver. As a result of the displacement, the contact of the protrusion 10b1 with the rear end of the slider 11 is released, and the connection between the slider 11 and the rotary shaft 20 is released. Therefore, when the release lever L is rotated in the direction of arrow C, the rotation shaft 20 is not rotated, and only the lever itself is moved.

  Thus, the printer PR1 is transported in a state in which the door member 2 is closed and the pressure contact state between the transfer belt 100 and the transfer roller 101 is released, and damage to the members and the like is suppressed.

  (Second Embodiment)

  A printer PR2 as an image forming apparatus according to a second embodiment of the present invention will be described with reference to FIGS.

  The overall configuration of the printer PR2 is the same as that of the printer PR1 according to the first embodiment shown in FIG. 1 and FIG. The same reference numerals are assigned to the same components.

  The printer PR2 is different from the printer PR1 in that the release lever L includes a variable coupling mechanism J2 instead of the variable coupling mechanism J1.

  As shown in FIG. 9, the variable coupling mechanism J2 in the present embodiment is displaced in the longitudinal direction of the shaft with respect to the D-shaped tip portion 20a of the rotating shaft 20 of the releasing mechanism K to be in a connected state and a released state. A changeable engagement element 30 and a spring 40 that urges the engagement element 30 against the distal end portion 20a of the rotary shaft 20 are provided.

  That is, as shown in FIG. 10, an accommodation portion 50 for accommodating the engagement element 30 and the spring 40 is formed at one end of the release lever L, and protrusions 30 a and 30 b formed above and below the engagement element 30. The grooves 50 a and 50 b formed above and below the housing portion 50 are movably passed through the housing portion 50 so as to be displaceable in the longitudinal direction of the rotary shaft 20.

  A constricted portion 21 is formed in the vicinity of the distal end of the rotating shaft 20, and the engaging member 52 is fitted in the constricted portion 21 in a state where the distal end portion 20 a is inserted into the accommodating portion 50 of the release lever L. 52 is engaged with the engaging portion 51 so that the rotating shaft 20 is held by the release lever L.

  Next, the operation of the variable coupling mechanism J2 will be described with reference to FIGS.

  As shown in FIG. 11, the release lever L is in a state in which the distal end portion 20 a of the rotating shaft 20 and the engaging element 30 are engaged at the operable position P1 and the operation prohibiting position P2.

  As a result, at the operable position P1, the transfer belt 100 and the transfer roller 101 are held in a pressure contact state, and the door 2 can be closed without the protrusion 2a and the release lever L interfering with each other.

  The transfer belt 100 and the transfer roller 101 are released from the pressure contact state at the operation prohibiting position P2 in which the release lever L is rotated in a state in which the distal end portion 20a of the rotating shaft 20 and the engaging element 30 are engaged. The protrusion 2a and the release lever L interfere with each other so that the door member 2 cannot be closed.

  On the other hand, as shown in FIG. 12, the release lever L is rotated while the protrusion 30b below the engaging element 30 is manually moved in the direction of arrow E, thereby engaging with the tip 20a of the rotating shaft 20. The engaging member 30 is disengaged.

  As a result, the transfer belt 100 and the transfer roller 101 are released from the pressure contact state at the transport position P3, and the door member 2 can be closed without interference between the protrusion 2a and the release lever L.

  Although the invention made by the present inventor has been specifically described based on the embodiments, the embodiments disclosed herein are illustrative in all respects and are not limited to the disclosed technology. Should not be considered. That is, the technical scope of the present invention should not be construed restrictively based on the description in the above embodiment, but should be construed according to the description of the scope of claims. All modifications that fall within the scope of the claims and the equivalent technology are included.

  The image forming apparatus according to the present invention can be applied to a copying machine, a laser printer, a full-color printer, a multifunction machine, a facsimile machine, and the like.

1 is a perspective view illustrating a schematic configuration of a printer PR1 according to a first embodiment. FIG. 2 is a front view showing a main part of the printer PR1 according to the first embodiment. It is explanatory drawing which shows schematic structure of the cancellation | release mechanism K in printer PR1 which concerns on 1st Embodiment. It is explanatory drawing which shows the state of the release lever L in the operable position P1. 3 is a cross-sectional view of the release lever L along AA. It is explanatory drawing which shows the structural example of the guide groove. It is explanatory drawing which shows the state of the release lever L in the operation prohibition position P2. It is explanatory drawing which shows the state of the release lever L in the transport position P3. It is a perspective view which shows schematic structure of the variable connection mechanism J2 in printer PR2 which concerns on 2nd Embodiment. It is a disassembled perspective view which shows schematic structure of the cancellation | release lever L in printer PR2 which concerns on 2nd Embodiment. It is explanatory drawing which shows operation | movement of the variable connection mechanism J2 in printer PR2 which concerns on 2nd Embodiment. It is explanatory drawing which shows operation | movement of the variable connection mechanism J2 in printer PR2 which concerns on 2nd Embodiment.

Explanation of symbols

PR1, PR2 printer (image forming device)
DESCRIPTION OF SYMBOLS 1 Case 2 Door member 2a Protrusion part 3Y, 3M, 3C, 3B Toner cartridge 4 Guide groove (guide means)
4a-c fitting part 10 lever body 10b fixing claw (regulating member, claw part)
10b1 Projection 10c Wall 10e Guide 10f Groove 11 Slider 12 Spring (biasing means)
20 Rotating shaft 20a Tip part 20a1 Flat part 20a2 Circumferential part 30 Engagement element 30a Projection part 30b Projection part (regulation member, claw part)
40 Spring (biasing means)
50 receiving portion 50a groove 51 engaging portion 52 locking member K release mechanism 100 transfer belt (transfer means)
101 Transfer roller (predetermined rotating body)
102 Pressure member 103 Cam member 104 Spring 300Y, 300M, 300C, 300B Photosensitive cartridge (photosensitive member)
J1, J2 Variable coupling mechanism L Release lever P1 Operable position P2 Operation prohibited position P3 Transport position S Opening part

Claims (6)

A release mechanism for releasing the pressure contact state between the transfer means for transferring the image and the predetermined rotating body when attaching or detaching the photosensitive member;
A release lever that is connected to a rotation shaft provided in the release mechanism and operates to release the pressure contact state;
A guide means for holding the release lever at any one of three positions of an operable position, an operation prohibited position, and a transport position when the release lever is rotated;
A door member that is opened and closed when the photosensitive member is attached and detached;
Protrusions provided on the door member that interfere with a part of the release lever and prevent the door member from being blocked when the release lever is held at the operation prohibiting position;
An image forming apparatus comprising: The release lever is
Maintaining the connection with the rotating shaft in a state where the pressure contact state is maintained when held at the operable position;
Maintaining the connection with the rotating shaft in a state in which the pressure contact state is released when held at the operation prohibition position;
The image forming apparatus according to claim 1, further comprising a variable connection mechanism that releases the connection with the rotation shaft in a state where the pressure contact state is released when held at the transport position. The variable coupling mechanism is
A slider that is slidably contacted with the circumferential surface of the rotary shaft, which has an engagement portion on the circumference;
Urging means for urging the slider to the rotating shaft;
The slider is engaged and connected to the engaging portion of the rotating shaft at the operable position and the operation prohibiting position, and the slider is engaged with the rotating shaft at the transport position. A regulating member that transitions to a movable state in contact with the circumferential part from the part,
The image forming apparatus according to claim 2, comprising:   The regulating member is engaged with the slider in a state in which the slider is engaged with and engaged with the engaging portion of the rotating shaft, and contacts the circumferential portion from the engaging portion of the rotating shaft. The image forming apparatus according to claim 3, wherein the image forming apparatus includes a protrusion that is disengaged from the slider in a movable state.   5. The protrusion is provided at a tip of a claw portion that is formed integrally with the release lever and swingable in a direction in which engagement with the slider is released. Image forming apparatus. The variable coupling mechanism is
An engaging portion formed at an end of the rotating shaft;
An engaging element that is engaged and connected to the engaging portion at the operable position and the operation prohibiting position and is capable of moving forward and backward in the axial direction so as to be disengaged from the engaging portion at the transport position. When,
Urging means for urging the engaging element toward the distal end side of the rotating shaft;
The image forming apparatus according to claim 2, comprising:

Images