JP2011252981A - Image forming apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image forming apparatus by which a user can perform jam processing without widely opening a door and needs to widely open it only when replacing a unit.SOLUTION: An image forming apparatus 10 includes: an intermediate transfer unit 40; an apparatus body 10A; a door unit 20 freely rotatably mounted on the apparatus body 10A for constituting a transport path 11 for transporting a sheet P in a state that the apparatus body 10A is closed; and a door regulation member 71 that holds the door unit to be open at a first rotation angle θ1 to form a first space A1 allowing a user to access a region that has formed the transport path 11, and holds the door unit 20 to be open at a second rotation angle θ2 that is larger than the first rotation angle θ1 to form a second space A2 allowing the user to extract the intermediate transfer unit 40 and a feed-out unit 50.

Description

  The present invention relates to an image forming apparatus including a door that opens and closes with respect to an image forming apparatus main body.

  The image forming apparatus includes a sheet conveyance path from the sheet storage to the sheet discharge tray. When the user uses the image forming apparatus, a jam may occur in the main body of the image forming apparatus due to the sheet being jammed for some reason. Therefore, the image forming apparatus is required to be convenient for the user to easily perform jam processing. Various units are provided inside the image forming apparatus. When the unit needs to be replaced due to its life or the like, the image forming apparatus is required to be convenient for the user to replace the unit.

  Regarding the convenience of the jam processing, the invention described in Patent Document 1 is disclosed. In the invention described in Patent Document 1, a part of a sheet conveyance path is provided in a part of a door that is rotatably attached to an image forming apparatus main body, and the conveyance path is formed when the door rotates around a fulcrum. Widely open. Of the arms supporting the opening of the door, the arm on the front side of the image forming apparatus main body is installed at a low position, so that the user can easily put his hand from the front side of the image forming apparatus main body, Convenience is planned.

  Moreover, regarding the convenience of unit replacement, the invention described in Patent Document 2 is disclosed. In the invention described in Patent Document 2, the intermediate transfer unit is fixed to the exterior door and is integrally formed. When the exterior door is opened, the intermediate transfer unit is exposed to the outside of the image forming apparatus main body, and the user can replace the intermediate transfer unit without having to access the inside of the image forming apparatus main body. It has been.

JP 2006-195271 A JP 2007-47571 A

  However, in the invention described in Patent Document 1, when the user replaces the unit inside the image forming apparatus main body, the door must be opened widely. This is contrary to the space saving demanded in recent years.

  Further, in the invention described in Patent Document 2, when the user performs sheet jam processing inside the image forming apparatus main body, there is a possibility that the unit that does not need to be touched during jam processing may be inadvertently touched. As a result, the fixed position of the unit is displaced, and the image may be affected by an abnormal arrangement of the unit.

  In view of the above circumstances, an object of the present invention is to provide an image forming apparatus in which a user can perform jam processing without opening the door greatly, and only needs to open the door greatly when replacing the unit.

  In order to solve the above-described problems, an image forming apparatus of the present invention includes an apparatus main body that can store a unit, and a conveyance that is rotatably attached to the apparatus main body and conveys a sheet in a closed state where the apparatus main body is closed. A user forms a path with the apparatus main body, and holds the door open at a first rotation angle based on the angle of the closed state. A first space that can be formed is formed, and the user holds the door open at a second rotation angle larger than the first rotation angle with respect to the angle of the closed state, and the user takes out the unit. And a rotation angle holding means for forming a second space that is made possible.

  According to the present invention, in the case of jam processing, the user can access the part that has formed the transport path by setting the door to the first rotation angle. Further, in the case of unit replacement, the user can replace the unit by setting the door to the second rotation angle. As a result, the user can perform jam processing without opening the door greatly, and only needs to open the door greatly when replacing the unit.

1 is a cross-sectional view illustrating a configuration of an image forming apparatus according to an embodiment of the present invention. FIG. 3 is a cross-sectional view of the image forming apparatus illustrating a progress state in which the door shifts from a closed state to an open state. FIG. 3 is a cross-sectional view of the image forming apparatus showing a state where the door is completely shifted from the closed state to the open state. It is an expanded sectional view etc. which show the process in which the rotation angle of the door rotated to the 1st rotation angle. It is an enlarged side view etc. which show the structure of a door control member. When a door unit is set to the 1st rotation angle, it is a perspective view etc. which show the state where a coupling protrudes.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be exemplarily described in detail with reference to the drawings. However, since the dimensions, materials, shapes, relative positions, etc. of the components described in this embodiment are appropriately changed depending on the configuration of the apparatus to which the invention is applied and various conditions, there is no specific description. As long as the scope of the invention is not limited to these, it is not intended.

  FIG. 1 is a cross-sectional view illustrating a configuration of an image forming apparatus 10 according to an embodiment of the present invention. The image forming apparatus 10 is a full-color image forming apparatus (a multi-function machine having both a copier function, a printer function, and a FAX function) using an electrophotographic image forming process. As shown in FIG. 1, the image forming apparatus 10 includes an image forming apparatus main body (hereinafter simply referred to as “apparatus main body”) 10A, and an exterior door unit (hereinafter referred to as “door unit 20”) with respect to the apparatus main body 10A. ) Is attached to the door rotation shaft 21 so as to be openable and closable. An image forming unit 52 (52A, 52B, 52C, 52D) for forming an image is provided inside the apparatus main body 10A. The image forming unit 52 includes a photosensitive drum 5 (5A, 5B, 5C, 5D) that is an “image carrier”, a primary transfer roller 7 (7A, 7B, 7C, 7D) that is a “transfer device”, and the like. . At least the photosensitive drum 5 may be included in a process cartridge and incorporated in the apparatus main body 10A as a process cartridge.

  The image forming apparatus 10 includes an apparatus main body 10A that can store the fixing device 30, the intermediate transfer unit 40, the feeding unit 50, and the feeding cassette 60. Among these, the intermediate transfer unit 40 and the feeding unit 50 are configured to be detachable from the apparatus main body 10A. Further, the image forming apparatus 10 includes a door unit 20 that is a “door” that is rotatably attached to the apparatus main body 10A. In the closed state in which the door unit 20 closes the apparatus main body 10A, the door unit 20 forms a conveyance path 11 for conveying the sheet P together with the apparatus main body 10A.

  The intermediate transfer unit 40 includes an intermediate transfer belt 40A. The intermediate transfer belt 40A is suspended from rollers 25 and 26, a secondary transfer counter roller 27, and a plurality of primary transfer rollers 7 (7A to 7D). A secondary transfer counter roller 27 and transport rollers 23B and 24B are disposed on the transport path 11 side of the apparatus main body 10A. On the side of the conveyance path 11 of the door main body 20A of the door unit 20, a secondary transfer roller 22 and conveyance rollers 23A and 24A for conveying the sheet P are provided.

  Next, the flow of the sheet P on which the image is transferred will be described. The sheets P stacked on the feeding cassette 60 are fed by driving the feeding unit 50. An image formed on the intermediate transfer unit 40 by the voltage applied to the secondary transfer roller 22 is transferred to the fed sheet P while passing through the conveyance path 11. Then, the image transferred to the sheet P is fixed by the fixing device 30, and the sheet P is discharged to the discharge tray 12.

  FIG. 2 is a cross-sectional view of the image forming apparatus 10 showing a state in which the door unit 20 transitions from the closed state to the open state. In FIG. 2, a connecting member 70 and a door restricting member 71 described later are omitted. As shown in FIG. 2, the door unit 20 is set to the first rotation angle θ1 in the course of the transition from the closed state to the open state. As described above, when the door unit 20 is held in the opened state at the first rotation angle θ1 with respect to the angle of the closed state, the user can access the portion that has formed the transport path 11. One space A1 is formed. With reference to FIG. 2, a user operation when the user performs jam processing when the sheet P is jammed inside the conveyance path 11 will be described below.

  When jamming the sheet P, the user rotates the door unit 20 with the door rotation shaft 21 as a fulcrum to open the conveyance path 11 in order to remove the sheet P remaining in the conveyance path 11. At this time, the opening angle of the door unit 20 is restricted by the first rotation angle θ1. When the door unit 20 is arranged at the first rotation angle θ1, when the user accesses the transport path 11, the transport path 11 is not only from the front of the apparatus main body 10A but also from the door unit 20 side. Can be easily approached. Moreover, the 1st rotation angle (theta) 1 should just be an angle which makes 1st space A1 with the favorable visibility of the conveyance path | route 11. FIG. The first rotation angle θ1 only needs to be opened about 50 degrees with respect to the closed state of the door unit 20 and does not need to be fully opened, so that the installation space for the apparatus main body 10A can be reduced. Actually, the width required when the door unit 20 is opened is about 65% when the door unit 20 is opened 90 degrees, and the space is reduced by 35%.

  When the door unit 20 is opened to the first rotation angle θ <b> 1, the door unit 20 is disposed at a position on the drawing locus where the intermediate transfer unit 40 and the feeding unit 50 are pulled out. Thus, in a state where the door unit 20 is opened to the first rotation angle θ1, the user cannot take out the intermediate transfer unit 40 and the feeding unit 50.

  FIG. 3 is a cross-sectional view of the image forming apparatus 10 showing a state in which the door unit 20 has completely shifted from the closed state to the open state. In FIG. 3, a connecting member 70 and a door restricting member 71 which will be described later are omitted. As shown in FIG. 3, when the door unit 20 has completely shifted from the closed state to the open state, the door unit 20 is set to the second rotation angle θ2. As described above, when the door unit 20 is held in the opened state at the second rotation angle θ2 larger than the first rotation angle θ1 with the closed state as a reference, the intermediate transfer unit 40 and the feeding unit 50 are held. Is formed so that the user can take out the second space A2. The maintainability of unit replacement will be described in detail below with reference to FIG.

  When the user replaces the unit, the user opens the door unit 20 to the second rotation angle θ2 with the door rotation shaft 21 as a fulcrum. The second rotation angle θ2 is preferably opened by about 90 degrees in order to attach and detach the intermediate transfer unit 40 and the feeding unit 50. When the door unit 20 is opened to the second rotation angle θ2, the intermediate transfer unit 40 and the feeding unit 50 are detachable in the opening direction of the door unit 20.

  The intermediate transfer unit 40 and the feeding unit 50 may need to be replaced for reasons such as unit life. In particular, when the intermediate transfer unit 40 damages the intermediate transfer belt 40A, which is a component of the intermediate transfer unit 40, the image is affected, care must be taken when replacing the intermediate transfer unit 40. However, servicelessness has recently been demanded, and it is desirable that even users who do not have specialized knowledge can exchange units.

  There is a method of attaching / detaching the intermediate transfer unit 40 to the upper side or the front side of the apparatus main body 10 </ b> A. However, in these cases, since a plurality of procedures are required before the intermediate transfer unit 40 is removed, the replacement is not easy. On the other hand, since the intermediate transfer unit 40 can be accessed only by opening and closing the door unit 20, it is easy for the user to replace the unit when replacing the unit, leading to good maintenance and servicelessness.

  When the door unit 20 is opened to the second rotation angle θ <b> 2, the door unit 20 is disposed at a position deviated from the drawing locus for pulling out the intermediate transfer unit 40 and the feeding unit 50. As described above, the user can take out the intermediate transfer unit 40 and the feeding unit 50 when the door unit 20 is opened at the second rotation angle θ2 or opened.

  FIG. 4A is an enlarged cross-sectional view illustrating a process in which the rotation angle of the door unit 20 is rotated to the first rotation angle θ1. As shown in FIG. 4A, the door unit 20 is rotatable about a door rotation shaft 21 attached to the apparatus main body 10A. A connecting shaft 23 is attached to the back surface of the door unit 20, and a connecting member 70 is swingably attached to the connecting shaft 23.

  On the other hand, a hole 90a is formed in the side plate 90 of the apparatus main body 10A, and a door restricting member 71 as a “rotation angle holding means” is inserted into the hole 90a. The door restricting member 71 is configured to be able to enter and leave the apparatus main body 10A through the hole 90a. The connecting member 70 described above has a connecting end 70A, the door regulating member 71 has a connecting end 71A, and the connecting end 70A and the connecting end 71A are connected to each other by a connecting shaft 72. Therefore, the connecting member 70 described above is swingable about the connecting shaft 72 with respect to the door restricting member 71.

  Further, the apparatus main body 10A has a side plate 90 which is a “frame”. Furthermore, the door restricting member 71 has an outer sheet metal projection 89 that is a “first contact portion” with which the door unit 20 contacts the side plate 90 in the state of the first rotation angle θ1. The outer metal projection 89 is caught on the side plate 90. Therefore, the door unit 20 is regulated in a state of swinging to the first rotation angle θ1 with respect to the apparatus main body 10A.

  FIG. 4B is an enlarged cross-sectional view illustrating a process in which the rotation angle of the door unit 20 is rotated to the second rotation angle θ2. As shown in FIG. 4B, when the outer sheet metal projection 89 passes through the hole 90a, the door unit 20 is further rotated from the first rotation angle θ1. Then, the outer sheet metal protrusion 89 is pushed down, and the door restricting member 71 is further pulled out through the hole 90a. The door restricting member 71 has an inner sheet metal protrusion 88 that is a “second contact portion” with which the door unit 20 contacts the side plate 90 in a state of the second rotation angle θ2. The inner sheet metal protrusion 88 is caught on the side plate 90. Therefore, the door unit 20 is regulated in a state where it swings to the second rotation angle θ2 with respect to the apparatus main body 10A.

  FIG. 5A is an enlarged side view showing the configuration of the door regulating member 71. FIG. 5B is an enlarged side view showing a state in which the outer metal plate 80 is removed from the door regulating member 71. Here, the description will be given first with reference to FIG. 5B and then with reference to FIG.

  As shown in FIG. 5B, the door restricting member 71 includes a sheet metal restricting member 83, a boss 85, an inner sheet metal 81, and an urging member 82. A boss 85 is fixed to the sheet metal regulating member 83. Further, the inner sheet metal 81 is formed with an elongated hole-shaped slit 86 and an outer sheet metal projection 89. The boss 85 of the sheet metal regulating member 83 is engaged with a slit 86 formed in the inner sheet metal 81. For this reason, the inner sheet metal 81 is movable in the left-right direction with respect to the boss 85 within the range of the elongated hole-shaped slit 86.

  Further, the urging member 82 has one end fixed to the sheet metal regulating member 83 and the other end fixed to the extending portion 91 of the inner sheet metal 81. The urging member 82 urges the inner metal plate 81 in the direction of arrow E. Therefore, the inner sheet metal 81 is urged so as to rotate in the direction of arrow F around the boss 85. Then, the outer sheet metal protrusion 89 is inserted into the hole between the wall portions 83a and 83a. In the state where the urging member 82 urges the inner sheet metal 81 as much as possible, the outer sheet metal projection 89 is set to protrude from the sheet metal regulating member 83. As described above, the outer sheet metal protrusion 89 is a protrusion for maintaining the state in which the door unit 20 is rotated to the first rotation angle θ1.

  Then, the user presses the pressed portion 81a of the inner metal plate 81 (presses in the direction of arrow B in FIG. 5A). Then, since the inner sheet metal 81 swings downward about the boss 85 (downward in the direction opposite to the arrow F), the outer sheet metal protrusion 89 is also lowered, and the door unit 20 is held at the first rotation angle θ1. Canceled.

  As shown in FIG. 5A, the outer sheet metal 80 is fixed to the sheet metal regulating member 83 with the inner sheet metal 81 interposed therebetween. The outer sheet metal 80 has an inner sheet metal projection 88 formed at one end. As described above, the inner sheet metal protrusion 88 is a protrusion for maintaining the state in which the door unit 20 is rotated to the second rotation angle θ2.

  The operation in which the door restricting member 71 restricts the rotation angle of the door unit 20 to the first rotation angle θ1 and the second rotation angle θ2 will be described below. When the user opens the door unit 20, the connecting member 70 is rotated, the door restricting member 71 is pulled rightward, and the outer sheet metal protrusion 89 abuts against the side plate 90 to restrict the rotation of the door unit 20 (( (Refer to Drawing 4 (a) and Drawing 5 (b).) The rotation angle of door unit 20 at this time is the 1st rotation angle theta 1. Since outer sheet metal 80 and inner sheet metal 81 collide with metal, There is no problem in strength.

  The door restricting member 71 includes a pressed portion 81 a that is a “release means” that releases the contact state of the outer metal plate protrusion 89 and the side plate 90. The user presses and operates the pressed portion 81a. Then, the state in which the inner sheet metal 81 swings downward and the outer sheet metal projection 89 hits the side plate 90 is released. With the opening operation of the door unit 20, the door restricting member 71 moves further outward, and the inner sheet metal protrusion 88 hits the side plate 90 to restrict the rotation of the door unit 20 (FIGS. 4B and 5A). )reference). The rotation angle of the door unit 20 at this time is the second rotation angle θ2. Thus, the door unit 20 can be rotated between the first rotation angle θ1 and the second rotation angle θ2 by the pressing of the pressed portion 81a.

  When the user closes the door unit 20, the door restricting member 71 moves to the left. The outer sheet metal protrusion 89 is tapered on the side opposite to the door unit 20. Therefore, when the door restricting member 71 moves to the left, the outer sheet metal protrusion 89 is naturally pushed down by the side plate 90. Therefore, in the process in which the door unit 20 is closed, the outer sheet metal protrusion 89 does not restrict the rotation angle of the door unit 20. As a result, the door unit 20 can be closed without the user pressing the pressed portion 81a in the direction of arrow B.

  FIG. 6A is a perspective view showing a state in which the coupling 101 protrudes when the door unit 20 is set to the first rotation angle θ1. A coupling 101 that is a “connecting unit” shown in FIG. 6A is a member that connects the ends of the secondary transfer counter roller 27 that is a part of the intermediate transfer unit 40. By the protrusion of the coupling 101, the intermediate transfer unit 40 is connected to the apparatus main body 10A.

  The coupling 101 is configured to protrude or retract in the axial direction of the secondary transfer opposing roller 27 by the rotation of the separation cam 102. A link 103 is fixed to the rotating portion of the separation cam 102. A link 104 is movably attached to the link 103, and a link 105 is rotatably attached to the link 104. The above-described door restricting member 71 is connected to the link 105, and the connecting member 70 is rotatably attached to the door restricting member 71.

  Here, consider a case where the door regulating member 71 sets the door unit 20 to the first rotation angle θ1. In this case, the separation cam 102 does not rotate more than a predetermined angle (an angle at which the coupling 101 protrudes) depending on the positions of the connecting member 70, the door regulating member 71, the link 105, the link 104, and the link 103. The coupling 101 protrudes. Accordingly, the secondary transfer counter roller 27 is connected by the coupling 101, and the coupling 101 transmits a driving force to the intermediate transfer unit 40. Since the secondary transfer counter roller 27 and the coupling 101 are connected, the user cannot remove the intermediate transfer unit 40 when the door unit 20 is at the first rotation angle θ1.

  FIG. 6B is a perspective view showing a state in which the coupling 101 is retracted when the door unit 20 is set to the second rotation angle θ2. By retracting the coupling 101 shown in FIG. 6B, the intermediate transfer unit 40 can be detached from the apparatus main body 10A.

  Here, consider a case where the door regulating member 71 sets the door unit 20 to the second rotation angle θ2. In this case, the connecting member 70, the door restricting member 71, and the links 105 and 104 are pulled outward. Then, the link 103 is pulled downward, the separation cam 102 rotates clockwise in FIG. 6B, and the coupling 101 is retracted. Accordingly, the coupling 101 is released and the intermediate transfer unit 40 can be detached from the apparatus main body 10A.

  Next, referring to FIGS. 2 and 3, the feeding unit 50 cannot be removed when the door unit 20 is at the first rotation angle θ <b> 1, and the fastening portion is the first when the door unit 20 is at the second rotation angle θ <b> 2. A configuration in which 51 can be removed and the feeding unit 50 can be removed will be described.

  A lower portion of the feeding unit 50 is fastened to the apparatus main body 10 </ b> A by a fastening portion 51. When the door unit 20 is at the first rotation angle θ1, the door unit 20 opens only about 50 degrees as shown in FIG. For this reason, the user cannot release the fastening state of the fastening part 51 of the feeding unit 50. Further, the door unit 20 is arranged on a locus for removing the feeding unit 50. For this reason, the user cannot remove the feeding unit 50.

  On the other hand, when the door unit 20 is at the second rotation angle θ2, the door unit 20 is opened to about 90 degrees as shown in FIG. Therefore, the user can access the feeding unit 50 by releasing the fastening state of the fastening portion 51 of the feeding unit 50. Moreover, the state where the door unit 20 is not arrange | positioned on the locus | trajectory which removes the feeding unit 50 is ensured. Therefore, the user can remove the feeding unit 50.

  Specifically, for example, a fastening portion 51 for attaching the feeding unit 50 to the apparatus main body 10A is provided on the side of the transport path 11 of the feeding unit 50, and a screw is used for the fastening portion 51. In the state where the door unit 20 is opened at the first rotation angle θ1, the space between the fastening portion 51 and the door unit 20 is set to be less than a predetermined dimension in the horizontal direction, and a screwdriver or the like cannot be inserted. The fastening cannot be released. When the door unit 20 is opened at the second rotation angle θ2, the space between the fastening portion 51 and the door unit 20 is set to a predetermined dimension (for example, a dimension in which a driver can be inserted) in the horizontal direction, and a driver or the like can be inserted. Therefore, the fastening by the fastening part 51 can be released.

  In this way, the rotation angle of the door unit 20 is set in two stages, and the door unit 20 is opened so as to secure a space where jamming is easy at the first rotation angle θ1. As a result, the installation space of the apparatus main body 10A can be reduced, and maintainability can be maintained. Further, the unit cannot be removed at the first rotation angle θ1. As a result, the possibility of the user inadvertently touching or removing the unit is reduced. When performing unit replacement, the door unit 20 can have a wide rotation angle by switching to the second rotation angle θ2, and the user's workability is improved. As a result, the installation space of the apparatus main body 10A can be reduced, and maintainability can be maintained.

  From the above, according to the configuration of the embodiment, in the case of jam processing, when the door unit 20 is set to the first rotation angle θ1, the user can access the portion that has formed the transport path 11. Can do. Further, when replacing the intermediate transfer unit 40 and the feeding unit 50, the user can replace the intermediate transfer unit 40 and the feeding unit 50 by setting the door unit 20 to the second rotation angle θ2. . As a result, the user can perform the jam processing without opening the door unit 20 greatly, and only needs to open the door unit 20 when the intermediate transfer unit 40 and the feeding unit 50 are replaced.

DESCRIPTION OF SYMBOLS 10 Image forming apparatus 10A Apparatus main body 11 Conveyance path 20 Door unit (door)
40 Intermediate transfer unit 50 Feeding unit 71 Door regulating member (rotation angle holding means)
θ1 first rotation angle θ2 second rotation angle A1 first space A2 second space

Claims (8)

A device body capable of storing the unit;
A door that is pivotally attached to the apparatus main body, and that forms a conveyance path with the apparatus main body for conveying a sheet in a closed state in which the apparatus main body is closed;
Holding the door in an open state at a first rotation angle based on the angle of the closed state, forming a first space that allows a user to access the site that has formed the transport path, Rotation that forms a second space in which the user can take out the unit by holding the door open at a second rotation angle larger than the first rotation angle with respect to the angle of the closed state. Angle holding means;
An image forming apparatus comprising:   The door is arranged at a position on a pull-out locus for pulling out the unit when the door is opened to the first rotation angle, and is detached from the pull-out locus for pulling out the unit when the door is opened to the second rotation angle. The image forming apparatus according to claim 1, wherein the image forming apparatus is disposed at a predetermined position.   A fastening portion for attaching the unit to the apparatus main body is provided on the transport path side of the unit. When the door is opened at the first rotation angle, the fastening portion and the door are horizontally arranged. When the interval is set to be less than a predetermined size and the fastening by the fastening portion cannot be released, and the door is opened at the second rotation angle, the space between the fastening portion and the door is set to a predetermined size in the horizontal direction. The image forming apparatus according to claim 2, wherein the fastening by the fastening portion can be released. A connecting means for connecting the unit to the apparatus body;
When the rotation angle holding means sets the door to the first rotation angle, the connecting means connects the unit to the apparatus main body, and the rotation angle holding means connects the door to the second rotation angle. 4. The image forming apparatus according to claim 1, wherein the connection unit is released to make the unit detachable from the apparatus main body.   The image forming apparatus according to claim 4, wherein the coupling unit is a coupling that transmits a driving force to the unit. The apparatus body has a frame,
The rotation angle holding means includes a first contact portion where the door contacts the frame in the first rotation angle state, and the door contacts the frame in the second rotation angle state. The image forming apparatus according to claim 1, further comprising a second contact portion. The holding means has release means for releasing the contact state between the first contact portion and the frame,
The image forming apparatus according to claim 6, wherein when the user operates the release unit, the door is rotatable between the first rotation angle and the second rotation angle.   The image forming apparatus according to claim 6, wherein the first abutting portion is tapered on a side opposite to the door.

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