JP2010230152A - Bearing member and image forming device having the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing member reduced in the size of a device body and easily attached and detached to/from the device body in a place where it is difficult to perform work without adding a member or without using a tool, and to provide an image forming device having the same. <P>SOLUTION: In the image forming device 100, a front side end 33a of a support shaft 33 of a conveyance guide 31 is supported by a bearing 35. The bearing 35 includes a body 35a, a flange 35b, a locking claw 35c to which a projection end 35ca is formed, and an abutment part 35d and a restriction part 35e. When the bearing 35 is attached and detached to/from a support hole 52a of a front side plate 52 of the device body, the locking claw 35c is bent inward so that the projection end 35 is engaged and disengaged with/from a locking hole 52ba formed at the flame 52b of the front side plate 52. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an image forming apparatus such as a digital copying machine and a laser printer, and more particularly to a method for opening and closing a manual tray used for conveying a sheet to an image forming unit.

  In the conventional image forming apparatus, for example, for the jam processing in the paper conveyance path, the conveyance guide is pivotally supported so that it can be opened and closed, and a side cover that can be opened and closed is provided at a position facing the conveyance guide that forms the paper conveyance path. There is something that is. In some cases, a manual feed tray that can be opened and closed is provided in a part of the side cover, and the uppermost surface of the paper placed on the manual feed tray is pressed against a paper feed roller by a lift plate.

In such an image forming apparatus, rotating members such as a conveyance guide, a side cover, and a manual feed tray are rotatably supported on the apparatus main body by using a support shaft as shown in FIG. That is, inserting the rear end portion 33a formed in the cross section D shape of the support shaft 33, the fixing hole 51a of the rear-side end portion 33a and the cross-section are formed in substantially the same shape provided on the back side plate 51 of the apparatus main body Then, the arrangement of the rear side end portion 33a is fixed by attaching a stop ring 41 for preventing the removal from the axially outer side (left side in the figure).

  At this time, the front side end portion 33b protrudes outward in the axial direction from the support hole 52a provided in the front side plate 52, and a bearing (bearing member) 35 passed through the front side end portion 33b is attached to the support hole 52a. Then, similarly to the above, the arrangement of the front side end portion 33b is fixed by mounting the stop ring 41 from the axially outer side (right side in the figure).

  In such a method, the gap between the inner diameter of the fixed hole 51a and the outer diameter of the rear side end portion 33a of the support shaft 33 is reduced to improve the positional accuracy of the support shaft 33. For this reason, the inner diameter of the support hole 52a through which the support shaft 33 penetrates in the front side plate 52 is increased to facilitate the operation of passing the support shaft 33 from the front side plate 52 to the rear side plate 51 during assembly, and the rear side end portion 33a. It is easy to insert into the fixing hole 51a. And the support shaft 33 is supported by mounting | wearing the support hole 52a with the bearing 35 which let the front side edge part 33b pass.

  However, when the stop ring as described above is used, the number of parts increases and a tool for mounting is also required. Further, since both ends of the support shaft are in narrow places such as the front side and the back side end of the apparatus main body, it is difficult to attach a stop ring or the like. Therefore, a method for fixing the bearing without using a stop ring has been proposed.

  For example, in Patent Document 1, two protrusions for retaining a bearing are engaged with side walls around a long hole-shaped bearing support hole (hole) formed in the support wall so as to be retained in the axial direction. By inserting and snap-fitting the snap-fit part and the locking part provided on the support wall to prevent the rotation of the bearing in the axial rotation direction, a simple configuration without using special tools and parts, the shaft An inexpensive and attachable / detachable method for improving operability is disclosed.

JP-A-8-169588

  However, in the method of Patent Document 1, since the support hole of the bearing has a different diameter, it is difficult to insert the bearing into the support hole. Further, since it is necessary to sandwich the side wall by the retaining protrusion, it is difficult to sandwich the side wall particularly when the side wall is thick.

  SUMMARY OF THE INVENTION In view of the above problems, the present invention reduces the size of the apparatus main body, and can easily attach to and detach from the apparatus main body in places where it is difficult to work without adding members or using tools, and image formation including the same. An object is to provide an apparatus.

  In order to achieve the above object, the present invention provides a bearing member for a support shaft on which a rotating member mounted on the apparatus main body is supported, and is attached to and detached from a support hole that is provided in the apparatus main body and through which the support shaft can pass. A main body made of a cylindrical member capable of projecting, a flange portion that protrudes from the end of the outer peripheral surface of the main body portion, the movement of the main body portion to the mounting side can be restricted, and the main body portion of the spindle And a contact part that protrudes from the inner peripheral surface of the main body part and can come into contact with one end part of the support shaft, and for preventing the main body part from falling off from the apparatus main body. A locking claw portion formed by cutting the flange portion from the flange portion to the central portion in a substantially parallel manner at a predetermined interval along the longitudinal direction of the main body portion. The projecting end of the pawl for the stop constitutes a part of the flange portion and the device body It can be locked to the provided locking portion, and when the locking claw portion is attached to or detached from the apparatus main body, the protruding end portion is locked to the locking portion by bending toward the inner peripheral side of the main body portion. And it is characterized by being unlocked.

  Further, the present invention is characterized in that, in the bearing member having the above-described configuration, a restricting portion that protrudes from the inner peripheral surface of the main body portion and is capable of restricting bending of the locking claw portion toward the inner peripheral side is formed. Yes.

  According to the present invention, in the bearing member configured as described above, an outer diameter of the protruding end portion is formed so as to increase from one end portion to the other end portion in the circumferential direction.

  According to the present invention, in the bearing member configured as described above, the main body can pivotally support the rotating member so as to be rotatable.

  In addition, the present invention is an image forming apparatus provided with the bearing member.

  According to the first configuration of the present invention, the flange portion, the abutting portion, and the locking claw portion are formed in the main body portion of the bearing member, and the protruding end portion of the locking claw portion constitutes a part of the flange portion. At the same time, it can be locked to the locking part provided on the main body of the device, and when the locking claw is bent to the inner peripheral side of the main body when it is attached to or detached from the main body, the protruding end is locked to the locking portion. And by releasing the lock, it can be easily attached to and detached from the apparatus main body even in a place where it is difficult to work without adding a member or using a tool. In addition, cost is reduced and resources are saved.

  Further, according to the second configuration of the present invention, in the bearing of the first configuration, the regulating portion that protrudes from the inner circumferential surface of the main body portion and can regulate the bending of the locking claw portion toward the inner circumferential side. By forming, when attaching and detaching the bearing member, it is possible to prevent the locking claw portion from being excessively bent and damaged.

  According to the third configuration of the present invention, in the bearing having the first or second configuration, the outer diameter of the projecting end portion is formed so as to increase from one end portion to the other end portion in the circumferential direction. By doing so, the locking of the protruding end portion with respect to the locking portion can be released only by rotating the bearing member in one direction, so that workability is improved.

  Moreover, according to the 4th structure of this invention, in the bearing member of the said any one of the 1st-3rd structure, a main-body part can be pivotally supported so that a rotation member can be rotated. Therefore, the number of members can be further reduced.

  Further, according to the fifth configuration of the present invention, it is possible to improve assemblability by providing the image forming apparatus including the bearing member having any one of the first to fourth configurations.

1 is an overview diagram showing an image forming apparatus according to an embodiment of the present invention. Schematic diagram showing the schematic configuration seen from the front of FIG. The perspective view which shows the periphery of the spindle with which the bearing which concerns on 1st Embodiment of this invention was mounted | worn. FIG. 4A is a view showing the periphery of a support shaft to which a bearing according to the first embodiment of the present invention is mounted, and FIG. 4A is a perspective view of FIG. 3 viewed from the direction A (back side), and FIG. b) Perspective view seen from direction B (front side) The perspective view which shows the bearing which concerns on this embodiment The perspective view which shows the state with which the bearing which concerns on this embodiment was mounted | worn with the apparatus main body. FIG. 7A is a partial side view showing a state of the locking claw portion of the bearing according to the present embodiment, and FIG. 7A is a view showing a state when the bearing is mounted on the apparatus main body, and FIG. ) Is a diagram showing the state when worn It is a partial front view which shows the state of the protrusion end part of the nail | claw part for latching of the bearing which concerns on this embodiment, and Fig.8 (a) is a front view which shows a state when a bearing is mounted | worn with the apparatus main body. FIG. 8 (b) is a diagram showing a state when the detachment is performed. The side view which shows the periphery of the spindle with which the bearing which concerns on 2nd Embodiment of this invention was mounted | worn. Side view showing the periphery of a spindle with a conventional bearing installed

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an external view of an image forming apparatus equipped with a bearing according to an embodiment of the present invention, and FIG. 2 is a schematic view showing a schematic configuration viewed from the front. 1 and 2, reference numeral 100 denotes an image forming apparatus, and here, a digital multifunction peripheral is shown as an example. In FIG. 2, the sheet conveyance direction is indicated by a solid line and a broken line arrow.

  As shown in FIGS. 1 and 2, in the image forming apparatus 100, when performing a copying operation, in the image forming unit 3 in the multifunction machine main body 1, a small-diameter photosensitive member that rotates clockwise in the drawing by the charging unit 4. The drum 5 is uniformly charged, and an electrostatic latent image is formed on the photosensitive drum 5 by a laser beam from an exposure unit (laser scanning unit or the like) 7 based on document image data read by the image reading unit 6. A developer (hereinafter referred to as toner) is attached to the electrostatic latent image by the developing unit 8 to form a toner image. The toner is supplied to the developing unit 8 from the toner container 9.

  The sheet is guided from the sheet feeding mechanism 10 to the first sheet conveyance path 11 (shown by the solid line portion in FIG. 2 and the arrow indicates the conveyance direction) toward the photosensitive drum 5 on which the toner image is formed as described above. However, the toner image on the surface of the photosensitive drum 5 is transferred onto the sheet by the transfer roller 13 in the image forming unit 3 via the registration roller pair 12 including the driving roller 12a and the driven roller 12b. Transcribed. The sheet onto which the toner image has been transferred is separated from the photosensitive drum 5, guided by a conveyance guide (rotating member) 31, and conveyed to a fixing device 14 having a fixing roller pair 14a to fix the toner image.

  The sheet that has passed through the fixing device 14 is sent to the second sheet conveyance path 15 (shown by the solid line portion in FIG. 2, the arrow indicates the conveyance direction), and is sent as it is (or is sent to the duplex conveyance path 16 to both sides. After copying, the paper is discharged to the paper discharge portion of the discharge tray 17 via the discharge roller pair 20. Although not shown, a static elimination device that removes residual charges on the surface of the photosensitive drum 5 is provided on the downstream side of the cleaning device 18.

  Further, the paper feed mechanism 10 is detachably attached to the multifunction machine main body 1 and includes a paper feed cassette 10a for storing paper and a manual feed tray 10b provided above the paper feed cassette 10a. 11 is connected to the image forming unit 3 including the photosensitive drum 5 and the developing unit 8.

  The outer surface (left side in FIG. 2) of the first paper transport path 11 is formed by a transport guide 31 that can rotate in the vertical direction rotating upward. Further, when the conveyance guide 31 is rotated downward, the first sheet conveyance path 11 can be opened to perform jam processing or the like. The image reading unit 6 may be provided with a platen (document pressing) for pressing and holding a document to be placed.

  A duplex conveyance path 16 communicates with the upstream side of the discharge roller 20 in the second sheet conveyance path 15. The double-sided conveyance path 16 is a path through which a sheet with an image formed on one side is switched back by the discharge roller 20 and conveyed. The outer side (left side in FIG. 2) of the conveyance guide 31 and the inner side (see FIG. 2) of the left side cover 2. 2 (right side). The switched-back paper is guided to the double-sided conveyance path 16, and another image is formed again by the image forming unit 3 and discharged (double-sided copying).

  FIG. 3 is a perspective view showing the periphery of the support shaft on which the bearing according to the first embodiment of the present invention is mounted, and FIG. 4A is a perspective view of FIG. 3 viewed from the direction A (back side). FIG. 4B is a perspective view seen from the B direction (front side). Portions common to those in FIGS. 1, 2, and 10 are denoted by common reference numerals and description thereof is omitted.

  As shown in FIG. 3, the transport guide 31 is pivotally supported on the support shaft 33 so as to be rotatable. Also, as shown in FIG. 4A, the back side end 33a of the support shaft 33 is formed in a D-shaped cross section, and is inserted into and fixed to a fixing hole 51a provided in the back side plate 51 of the apparatus main body. It is like that. On the other hand, as shown in FIG. 4B, the front side end portion 33 b passes through a support hole 52 a provided in the front side plate 52 and is fixed by a bearing (bearing member) 35.

  FIG. 5 is a perspective view showing a bearing according to this embodiment, and FIG. 6 is a perspective view showing a state in which the bearing according to this embodiment is mounted on the apparatus main body. The bearing 35 includes a main body portion 35a, a flange portion 35b, a locking claw portion 35c, an abutting portion 35d, and a restricting portion 35e. The main body portion 35a is formed in a cylindrical shape, and is attached to the support hole 52a of the front side plate 52 of the apparatus main body in the direction of the arrow in the figure.

  A flange portion 35b that protrudes substantially vertically is formed at the end of the outer peripheral surface of the main body portion 35a on the detachment side (opposite to the white arrow). The flange portion 35b is configured to restrict movement of the bearing 35 toward the mounting side (in the direction of the white arrow) with respect to the support hole 52a. Then, two notches are formed substantially in parallel at a predetermined interval from the flange portion 35b toward the center portion along the longitudinal direction of the main body portion 35a, thereby forming a locking claw portion 35c. ing. The protruding end portion 35ca of the locking claw portion 35c constitutes a part of the flange portion 35b.

  Further, as shown in FIG. 7 to be described later, the locking claw portion 35c can be bent toward the inner peripheral side of the main body portion 35a. As a result, the projecting end portion 35ca of the locking claw portion 35c is hooked and fitted (locked) into a locking hole (locking portion) 52ba formed in the front side frame 52b of the front side plate 52, thereby bearings. 35 can be attached to the apparatus main body. Further, the protruding end portion 35ca can be removed (released) from the locking hole 52ba by bending the locking claw portion 35c inward.

  Further, the outer shape of the projecting end portion 35ca is formed so as to increase from one end portion in the circumferential direction (here, the upper end portion in FIG. 5) toward the other end portion (here, the lower end portion in FIG. 5). As a result, as shown in FIG. 8 to be described later, the locking between the protruding end portion 35ca and the locking portion 52ba can be released only by rotating in one direction (clockwise).

  A contact portion 35d made of a plate-like member substantially parallel to the flange portion 35b is formed on the inner peripheral surface of the main body portion 35a. The contact portion 35d is formed in a shape in which a circular part is cut into a C shape, and a predetermined interval is provided between the contact claw portion 35c and the engagement claw portion 35c toward the inner peripheral side. It can be bent sufficiently. Further, as shown in FIG. 6, when the bearing 35 is attached to the apparatus main body, the abutment portion 35d is prevented from coming off from the apparatus main body due to the abutment portion 35d coming into contact with the front end portion 33b of the support shaft 33. It is supposed to be.

  A restricting portion 35e is formed at a position facing the locking claw portion 35c with a predetermined interval on the inner peripheral surface of the main body portion 35a. The restricting portion 35e protrudes substantially vertically from the inner peripheral surface of the main body portion 35a and protrudes substantially vertically from the contact portion 35d, and is formed in a substantially convex shape when viewed from the locking claw portion 35c side. When the bearing 35 is removed from the apparatus main body, the movement of the locking claw portion 35c toward the inner peripheral side is restricted by the restriction portion 35e, so that the locking claw portion 35c does not bend too much inward. . Thereby, the breakage of the locking claw portion 35c can be prevented.

  Next, the attaching / detaching operation of the bearing 35 with respect to the apparatus main body will be described. Fig.7 (a) is a partial side view which shows the state of the nail | claw part for a latching when the bearing which concerns on this embodiment is installed, FIG.7 (b) is a nail | claw for a latching when mounted | worn. It is a partial side view which shows the state of a part. FIG. 8A is a front view showing a state of the protruding end portion of the locking claw when the bearing according to the present embodiment is mounted on the apparatus main body, and FIG. It is a front view which shows the state of the nail | claw part for latching when it is released | separated.

  First, mounting of the bearing 35 will be described. As described above, the support shaft 33 is inserted into the support hole 52a, and the back-side end portion 33a of the support shaft 33 is inserted into the fixing hole 51a of the back-side plate 51 (see FIG. 4a). Next, the bearing 35 is passed through the front end 33 b of the support shaft 33, and the main body 35 a is supported in the support hole of the front side plate 52 while the locking claw 35 ca of the bearing 35 is aligned with the frame portion 52 b of the front side plate 52. Insert into 52a. At this time, as shown in FIG. 7A, the locking claw portion 35c of the bearing 35 is pressed by the reaction from the frame portion 52b, so that it bends toward the inner peripheral side (in the direction of the solid arrow).

  In this way, the bearing 35 moves toward the apparatus (in the direction of the white arrow) while the locking claw 35c is bent. When the protruding end portion 35ca of the locking claw portion 35c is fitted into the locking hole 52ba of the frame portion 52b, the bending of the locking claw portion 35c is restored, and the protruding end as shown in FIG. The portion 35ca is caught in the locking hole 52ba. As a result, the bearing 35 is mounted in the support hole 52a of the apparatus main body and is prevented from falling off from the apparatus main body. At this time, the end surface of the front side end portion 33b of the support shaft 33 is in contact with the contact portion 35d of the bearing 35, so that the support shaft 33 is prevented from falling off from the main body portion.

  Next, the detachment of the bearing 35 will be described. From the mounted state shown in FIG. 7B, the locking claw portion 35c is bent toward the inner peripheral side (see FIG. 7A) to release the locking between the protruding end portion 35ca and the locking hole 52ba. can do. Here, since the outer diameter of the projecting end portion 35a is formed so as to increase from the upper end portion toward the lower end portion, the bearing 35 is moved from the mounted state shown in FIG. 8 (a) as shown in FIG. 8 (b). By rotating clockwise in the figure (in the direction of the solid line arrow), the protruding end 35ca can be removed from the locking hole 52ba and the locking can be released while the locking claw 35c is bent.

  As described above, the bearing 35 is formed with the main body portion 35a, the flange portion 35b, the locking claw portion 35c, and the contact portion 35d, and the locking claw portion 35c is attached to the inner periphery of the main body portion 35a when being attached to or detached from the apparatus main body. The protruding end portion 35ca of the locking claw portion 35c is locked and released from the locking portion 52ba by bending to the side. Accordingly, the bearing 35 can be easily attached to and detached from the apparatus main body even in a place where it is difficult to work without adding a member or using a tool. In addition, cost is reduced and resources are saved.

  In the present embodiment, since the restricting portion 35e for restricting the bending of the locking claw portion 35c toward the inner peripheral side is formed on the inner peripheral surface of the main body portion 35a, the locking claw is used when the bearing 35 is attached or detached. It is possible to prevent the portion 35c from being bent excessively. Here, since the restricting portion 35d protrudes from the inner peripheral surface of the main body portion 35a and the contact portion 35e, the pressure resistance strength of the restricting portion 35e can be increased.

  Further, in the present embodiment, since the outer diameter of the projecting end portion 35ca is formed so as to increase from the upper end portion toward the lower end portion, the bearing 35 is locked only by rotating clockwise (see FIG. 8). Since the latching claw portion 35c can be unlocked from the portion 52ba, workability is improved.

  However, the outer diameter of the protruding end portion 35ca is not particularly limited to the above embodiment, and can be appropriately set according to the configuration of the apparatus main body. For example, contrary to the above embodiment, the outer diameter of the projecting end 35ca is formed so as to increase from the lower end to the upper end in FIG. 8, and the bearing 35 is rotated counterclockwise. The locking claw portion 35c can be removed from the locking hole 52ba.

  FIG. 9 is a side view showing the periphery of the support shaft on which the bearing 35 according to the second embodiment of the present invention is mounted. Portions common to FIGS. 1 to 8 are denoted by common reference numerals and description thereof is omitted. As shown in FIG. 9, in the present embodiment, the rear side (left side in the drawing) engaging portion 10ba and the front side (right side in the drawing) engaging portion 10bb with respect to the axial direction of the manual feed tray (rotating member) 10b. The rear side engaging portion 10ba is pivotally supported on the support shaft 33 so as to be rotatable.

  On the other hand, the front side engaging portion 10bb is pivotally supported on the main body portion 35a of the bearing 35 so as to be rotatable. Since other configurations are exactly the same as those in the first embodiment, description thereof is omitted. According to this embodiment, since the support shaft 33 for supporting the manual feed tray 10b can be shared with the transport guide 31, the number of members can be further reduced.

  Here, the front side end portion 10bb of the manual feed tray is pivotally supported by the bearing 35. However, the bearing 35 is mounted on the rear side end portion 33a of the support shaft 33, and the front and rear side engaging portions 10ba are attached to the two bearings 35. 10bb can also be pivotally supported.

  In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the meaning of this invention. For example, in each of the above-described embodiments, the shape and size of the main body 35a, the flange 35b, the locking claw 35c, the protruding end 35ca, the abutting portion 35d, the restricting portion 35e, and the locking hole 52ba of the bearing 35 are as follows. If the projecting end portion 35ca can be locked and unlocked to the locking portion 52ba by bending the locking claw portion 35c toward the inner peripheral side of the main body portion 35a, it is appropriately designed according to the configuration of the apparatus main body. can do.

  Moreover, in each said embodiment, although the back side end part 33a of the spindle 33 was cut in the cross-section D shape and it inserted in the fixing hole 51a, the shape of the back side end part 33a and the fixing hole 51a is the back side end part. If 33a can be supported by the back side board 51, it will not specifically limit.

  In each of the above embodiments, the bearing 35 is mounted on the front end 33b of the support shaft 33. However, the bearing 35 can be mounted on the rear end 33a, and mounted on the front and rear ends 33a and 33b. You can also As described above, when two bearings 35 are mounted, the back side and front side engaging portions 10ba and 10bb of the manual feed tray 10b can be pivotally supported on the bearing 35 in the second embodiment.

  Further, in each of the above embodiments, the present invention is applied to the support shaft 33 of the transport guide 31. However, if the support shaft is mounted on the apparatus main body and can support the rotating member, for example, the side cover 2 or the like. Can also be applied.

  The present invention is a bearing member of a support shaft on which a rotating member mounted on the apparatus main body is pivotally supported, and the main body is formed of a cylindrical member that is provided in the apparatus main body and can be attached to and detached from a support hole through which the support shaft can pass. And a flange portion that protrudes from the detachable side end portion of the outer peripheral surface of the main body portion and is capable of restricting movement of the main body portion to the mounting side, and for preventing the support shaft from falling off from the main body portion A contact portion that protrudes from an inner peripheral surface of the main body portion and is capable of abutting against one end portion of the support shaft; and for preventing the main body portion from falling off from the apparatus main body. A locking claw portion formed by cutting the flange portion from the flange portion to the center portion in a substantially parallel manner at a predetermined interval along the longitudinal direction, and a protruding end of the locking claw portion. The part is part of the flange part and is locked to a locking part provided in the apparatus main body. And the protruding end portion is locked and unlocked by the locking portion when the locking claw portion is bent toward the inner peripheral side of the main body portion when being attached to or detached from the apparatus main body. .

  Thereby, it becomes possible to attach and detach easily to the apparatus main body even in a place where it is difficult to work without adding members or using tools. In addition, cost is reduced and resources are saved. Further, by forming a restricting portion that protrudes from the inner peripheral surface of the main body and can restrict the bending of the locking claw to the inner peripheral side, the locking claw is excessively bent when the bearing member is attached or detached. Can be prevented.

  In addition, by forming the outer diameter of the protruding end portion so as to increase from one end portion to the other end portion in the circumferential direction, the locking claw portion for the locking portion only by rotating the bearing member in one direction. Therefore, workability is improved. Further, by making the image forming apparatus provided with the bearing member, it is possible to improve assemblability.

1 MFP body 10b Bypass tray (rotating member)
10ba Rear side engaging portion 10bb Front side engaging portion 31 Transport guide (rotating member)
33 Support shaft 35 Bearing (bearing member)
35a body portion 35b flange portion 35c locking claw portion 35ca protruding end portion 35d abutting portion 35e regulating portion 52 front side plate 52a support hole 52b frame portion 52ba locking hole (locking portion)
100 Image forming apparatus

Claims (5)

A bearing member of a support shaft on which a rotating member mounted on the apparatus main body is pivotally supported,
A main body comprising a cylindrical member provided in the apparatus main body and detachable in a support hole through which the support shaft can pass;
A flange portion that protrudes from the detachable side end portion of the outer peripheral surface of the main body portion and is capable of restricting movement of the main body portion to the mounting side;
A contact portion for preventing the support shaft from falling off from the main body portion, protruding from an inner peripheral surface of the main body portion and capable of contacting with one end portion of the support shaft;
The main body is for preventing the main body from dropping off from the apparatus main body, and is formed by notching substantially parallel with a predetermined interval from the flange to the center along the longitudinal direction of the main body. And a pawl portion for stopping,
The protruding end portion of the locking claw portion constitutes a part of the flange portion and can be locked to a locking portion provided in the apparatus main body,
A bearing member, wherein the protruding end portion is locked and unlocked by the locking portion when the locking claw portion is bent toward the inner peripheral side of the main body portion when being attached to or detached from the apparatus main body. .   2. The bearing member according to claim 1, wherein a restricting portion that protrudes from an inner peripheral surface of the main body portion and is capable of restricting bending of the locking claw portion toward the inner peripheral side is formed.   The bearing member according to claim 1, wherein an outer diameter of the protruding end portion is formed so as to increase from one end portion toward the other end portion in the circumferential direction.   The bearing member according to claim 1, wherein the main body can pivotally support the rotating member.   An image forming apparatus comprising the bearing member according to claim 1.