JP7247591B2 - Rotating body, member to be attached to shaft, retaining member, device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a rotating body, a member attached to a shaft, a retaining member, and a device.

For example, there is a paper feed roller for feeding a sheet material, in which a rotating body is detachably attached to the outer periphery of a rotating shaft in order to enable replacement due to deterioration over time.

Conventionally, in a roller member in which a rotating shaft is inserted through an insertion hole of a roller portion and the roller portion is detachably attached to the outer periphery of the rotating shaft, the rotating shaft extends to the other end side of the roller portion through the insertion hole of the roller portion. While a recess is provided in the portion of the roller portion, a snap-fit portion that is elastically deformable extends outward in the axial direction from the other end of the roller portion. With the fit portion elastically deformed in the direction opposite to the extending direction, the engagement convex portion provided on the snap fit portion is engaged with the concave portion provided on the rotating shaft, and the elastic restoring force of the snap fit portion , one end of a roller portion is pressed against a positioning holding portion provided on a rotary shaft (Patent Document 1).

JP 2015-140218 A

However, in the configuration disclosed in Patent Document 1, in order to remove the roller portion from the shaft, the snap-fit portion must be radially widened to disengage the engaging protrusion from the recess while the roller portion is must be removed from the shaft. Therefore, there is a problem that the workability of attaching and detaching the rotating body to and from the shaft is poor.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to improve the workability of attaching and detaching to and from a shaft.

In order to solve the above problems, the rotating body according to the present invention includes:
A rotating body that is detachably attached to the end of a shaft having a recess provided at the end and a projection axially outward of the recess,
a hollow member into which the end of the shaft is inserted;
an outer peripheral member provided on the outer peripheral surface of the hollow member;
a mounting portion attached to an end of the hollow member;
a snap fit portion rotatably held by the mounting portion via a hinge portion;
The snap fit portion has a hook portion detachably hooked to the recess ,
The snap-fit portion is rotatable between a position where the hook portion is elastically deformed to ride over the protrusion , and the hook portion is engaged with the recess, and a position where the hook is disengaged from the recess. It was configured as follows.

According to the present invention, it is possible to improve the workability of attaching and detaching the shaft.

FIG. 4 is a perspective explanatory view of a rotating member in which a shaft according to the first embodiment of the present invention is inserted into a rotating body; It is an exploded perspective explanatory view of the rotating member. FIG. 4 is a perspective explanatory view of a rotating body, which is a member into which the shaft of the same rotating member is inserted; It is a side explanatory view of the rotating member. It is a cross-sectional explanatory view of the rotating member. It is front explanatory drawing of the same rotary body. FIG. 4 is an enlarged explanatory view of an engagement portion between a concave portion and a hook portion of the rotary member; FIG. 5 is a cross-sectional explanatory view for explaining the process of inserting the shaft into the rotating body; FIG. 10 is a side explanatory view for explaining when the rotating body is removed from the shaft; FIG. 5 is a front explanatory view for explaining the positional relationship between the snap-fit hook and the axis. FIG. 5 is a cross-sectional explanatory view for explaining a bending moment generated by an axial force acting on the hook. FIG. 10 is an explanatory diagram for explaining the force acting on the snap-fit portion when the rotating body is about to come off the shaft; 1 is an explanatory diagram for explaining the overall configuration of an example of an image forming apparatus as an apparatus according to the present invention; FIG. 3 is an explanatory diagram of an image forming unit of the image forming apparatus; FIG. 3 is an explanatory diagram of an intermediate transfer section of the image forming apparatus; FIG. It is an explanatory view showing an example of a feeding device. FIG. 4 is a perspective explanatory view of a roller portion when the roller of the feeding device is mounted on the shaft; It is a perspective explanatory view of the roller portion in a state in which the roller is similarly mounted on the shaft. It is a perspective explanatory view of a roller part in a state when similarly removing a roller from a shaft.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. A first embodiment of the present invention will be described with reference to FIGS. 1 to 7. FIG. 1 is a perspective explanatory view of the rotating member in which the shaft is inserted into the rotating body in the embodiment, FIG. 2 is an exploded perspective explanatory view of the rotating member, and FIG. 3 is the rotating body into which the shaft of the rotating member is inserted. is a perspective explanatory view of the. 4 is a side view of the rotary member, FIG. 5 is a cross-sectional view of the rotary member, FIG. 6 is a front view of the rotary member, and FIG. It is an expansion explanatory drawing.

A rotating member 1 is composed of a rotating body 2 and a shaft 3 inserted into the rotating body 2 .

The rotating body 2 includes a roller holding portion 12, which is a hollow member into which the shaft 3 is inserted, and a roller portion (roller portion) 13, which is an outer peripheral member press-fitted into the hollow member and formed of rubber or the like. It includes a holding portion and is composed of a holder portion 14 which is a retaining member according to the present invention. The rotating body 2 is held at the end of the shaft 3 by the stopper portion 33 of the shaft 3 and the holder portion 14 .

The holder portion 14 includes a mounting portion 41 fixed to the other surface of the roller holding portion 12 by adhesion, thermal crimping, ultrasonic welding, or the like, and a holding portion ( and a snap fit portion 43 which is a retaining portion).

The snap-fit portion 43 is elastically deformable in the radial direction of the shaft 3 and has two hook portions 44, 44 that can be engaged with the concave portion 31 formed in the end portion of the shaft 3 from the radial direction of the shaft 2. . The hooks 44, 44 have a claw shape. The rotating body 2 is held at the end of the shaft 3 by hooking the hooks 44 , 44 of the snap fit portion 43 on the recess 31 of the shaft 3 .

Here, as shown in FIG. 7, the snap-fit portion 43 is attached to the mounting portion 41 via the hinge portion 42 so that the hook portion 44 moves over the wall portion 32 axially outside the recess portion 31 and moves in the axial direction. It is rotatably held at (the end of the rotating body 2). The wall portion 32 is a portion having a larger diameter than the recessed portion 31 and is a protrusion that protrudes from the recessed portion 31 in the radial direction of the shaft.

The snap-fit portion 43 is provided with a knob portion 45 as an operation portion on the side opposite to the hinge portion 42 serving as a rotation fulcrum across the hook portion 44 .

As shown in FIG. 4, the knob 45 is formed obliquely in a direction away from the end face of the rotating body 2. As shown in FIG. Further, by using a different color for the knob portion 45 from other portions, it is possible to display the operation method in an easy-to-understand manner for the user. Coloring may be performed by means of printing, decal application, two-color molding, or the like.

A hook portion 46 as a locking portion is provided on the mounting portion 41 on the side opposite to the hinge portion 42, and a locking hole portion that is locked by the hook portion 46 is provided in the vicinity of the knob portion 45 of the snap fit portion 43. 47 is provided. With the hook portion 44 of the snap fit portion 43 engaged with the recessed portion 31 of the shaft 3, the hook portion 46 is fitted into the locking hole portion 47 of the snap fit portion 43 and locked.

The roller holding portion 12 of the rotating body 2 is provided with a projecting portion 39 for positioning the holder portion 14 in the radial direction. On the other hand, the mounting portion 41 of the holder portion 14 is provided with a plurality of holes 49 into which the protrusions 39 of the roller holding portion 12 are fitted. By having holes with different hole diameters and hole-to-hole distances as the plurality of holes 49 of the mounting portion 41 , it is possible to position and mount to many types of roller holding portions 12 .

Next, the operation of mounting the rotor 2 on the shaft 3 in this embodiment will be described with reference to FIG. 8 as well. FIG. 8 is a cross-sectional explanatory view for explaining the process of inserting the shaft into the rotating body.

As shown in FIG. 8( a ), by fitting the rotating body 2 to the end of the shaft 3 and relatively pushing the rotating body 2 in the direction of the arrow, the hook portion of the snap-fit portion 43 of the holder portion 14 can be pulled out. 44 contacts the end face of the shaft 3 .

From this state, when the rotating body 2 is further pushed in the direction of the arrow, the hooking portion 44 of the snap fit portion 43 is elastically deformed, and the hooking portions 44, 44 expand radially outward.

When the inner diameters of the hooks 44 , 44 are larger than the outer diameter of the wall portion 32 of the shaft 3 , the rotating body 2 can be pushed deeper than the end face of the shaft 31 .

Then, as shown in FIG. 8(b), when the hooks 44, 44 that have been elastically deformed and widened climb over the wall 32 and reach the position of the recess 31 of the shaft 3, the hooks 44, 44 are elastically deformed. The deformed shape returns to the shape before deformation. As a result, the hooks 44, 44 of the snap-fit portion 43 are engaged with the recessed portion 31 of the shaft 3, so that the rotating body 2 is positioned and held on the shaft 3 without backlash in the thrust direction.

In this case, by pushing the rotating body 2 onto the shaft 3 while the snap fit portion 43 is engaged with the hook portion 46 (closed state), the hook portion 44 is hooked on the concave portion 31 . The hook 44 can also be hooked on the concave portion 31 by closing the snap-fit portion 43 after the rotating body 2 is pushed into the shaft 3 with the snap-fit portion 43 opened.

Next, the operation of detaching the rotor 2 from the shaft 3 in this embodiment will be described with reference to FIG. 9 as well. FIG. 9 is an explanatory side view for the same explanation.

When the rotating body 2 is removed from the shaft 3, as shown in FIG. 9, the knob portion 45 of the snap fit portion 43 is pulled outward in the axial direction indicated by the arrow, so that the hook portions 44, 44 of the snap fit portion 43 are elastically deformed. and spread.

Then, by further pulling the knob portion 45 of the snap fit portion 43, the hook portion 44 is disengaged from the concave portion 31 and rides on the outer wall portion 32, as shown in FIG. It will come off and will be in the state shown in FIG. 7 (a).

Thereby, the rotating body 2 can be pulled out from the shaft 3 in the axial direction.

At this time, since the knob 45 is inclined in the direction away from the end surface of the rotating body 2, the operation of the knob 45 is easy.

In this way, by rotating the snap fit portion 43 in the direction in which the hook portion 44 goes over the axially outer wall portion 32 of the recess 31, the engagement between the snap fit portion 43 and the shaft 3 is released. Operability and workability when removing the rotating body 2 from the shaft 3 are improved.

Next, the positional relationship between the hook portion 44 of the snap fit portion 43 and the axial center, the slip-off prevention function, and the ease of removal will be described with reference to FIGS. 10 to 12. FIG. FIG. 10 is a front view for explaining the positional relationship between the hook and the axis, and FIG. 11 is a cross-sectional view for explaining the bending moment generated by the axial force acting on the hook. FIG. 12 is an explanatory diagram for explaining the force acting on the snap-fit portion when the rotating body is about to come off the shaft.

The snap-fit portion 43 is hooked at a position where the distance L1 from the hinge portion 42 serving as the pivot point to the center P1 of the hook portion 44 is longer than the distance L0 from the hinge portion 42 to the axis P0 (L1>L0). A portion 44 is provided. In other words, the hook portion 44 is arranged to be shifted toward the knob portion 45 side with respect to the hinge portion 42 .

Specifically, the hook portion 44 extends across the wall portion 32 from the outside in the axial direction of the shaft 3 toward the inside (from the right side to the left side in FIG. 11) in a state where the rotating body 2 is attached to the shaft 3 . It has one portion 44A and a second portion 44B that rises from the first portion 44A toward the inner side in the radial direction of the shaft 3 on the recessed portion 31 side of the wall portion 32 . The tip of the second portion 44B enters the recess 31 and engages with the recess 31 .

Here, the inner peripheral surface 44a of the first portion 44A of the hook portion 44 facing the wall portion 32 is a curved surface centered on P1. Since the center P1 of the shaft 3 is offset upward from the center P0, the distance from the center P1 of the hook 44 to the outer periphery of the wall portion 32 decreases upward in FIG.

With this configuration, the gap g between the first portion 44A of the hook portion 44 of the snap fit portion 43 and the wall portion 32 of the shaft 3 is equal to the gap g2 of the first portion 44A of the hook portion 44 on the knob portion 45 side. It is wider than the interval g1 on the part 42 side (g2>g1).

As shown in FIG. 11, when an axial force indicated by an arrow acts on the snap fit portion 43, a bending moment M acting outward (radially outward) is generated in the hook portion 44. As shown in FIG.

At this time, the magnitude of the bending moment M increases as the distance g between the hook portion 44 of the snap fit portion 43 and the wall portion 32 of the shaft 3 increases. easier to do. On the other hand, when the gap g between the hook portion 44 of the snap fit portion 43 and the wall portion 32 of the shaft 3 is narrow, the hook portion 44 is less likely to deform.

Therefore, on the hinge portion 42 side where the gap g between the first portion 44A of the hook portion 44 and the wall portion 32 of the shaft 3 is narrow (g1), the hook portion 44 is less likely to deform. Since a large force is required for the portion 44B of , to get over the wall portion 32, the rotating body 2 is difficult to come off.

On the other hand, on the knob portion 45 side where the gap g between the first portion 44A of the hook portion 44 and the wall portion 32 is large (gap g2), the hook portion 44 is easily deformed, and the second portion 44B of the hook portion 44 is deformed. Since the wall portion 32 is climbed over, the force in the axial direction may be small, so the operating force of the knob portion 45 may be small, and the snap-fit portion 43 can be easily removed.

Then, as shown in FIG. 12, the force F when the rotating body 2 tries to come off from the shaft 3 is transmitted to the snap fit part 43 via the hinge part 42, and the rotating body 2 comes off on the hinge part 42 side. Since the force of is increased, it is possible to prevent the rotating body 2 from slipping out of the shaft 3 .

In the above-described embodiment, a hinge is used to enable the snap-fit portion (holding portion, retaining portion) to rotate. When a snap-fit portion (holding portion, retaining portion) is rotatably provided directly on the portion 12 or the rotating body 2, the mounting portion may not be provided. In addition, the snap-fit portion (holding portion, retaining portion) can be rotatably held by a support shaft attached to the support shaft holding portion formed on the rotating body or its constituent members. .

Next, an example of an image forming apparatus as an apparatus having a rotating member including a rotating body according to the present invention will be described with reference to FIGS. 13 and 14. FIG. 13 is an explanatory diagram for explaining the overall configuration of the image forming apparatus, FIG. 14 is an explanatory diagram for an image forming section of the image forming apparatus, and FIG. 15 is an explanatory diagram for an intermediate transfer section of the image forming apparatus. be.

An intermediate transfer belt unit 115 is installed in the center of the image forming apparatus main body 100 . An image forming unit 106 composed of one process cartridge corresponding to black is detachably arranged so as to face the intermediate transfer belt 108 of the intermediate transfer belt unit 115 .

As shown in FIG. 14, the image forming unit 106 includes a photosensitive drum 101 as an image carrier, a charging unit 104 disposed around the photosensitive drum 101, a developing unit 105, a cleaning unit 102, a neutralizing unit, and the like. consists of

Then, an image (toner image) is formed on the photoreceptor drum 101 by performing image forming processes such as a charging process, an exposure process, a developing process, a transfer process, and a cleaning process on the photoreceptor drum 101 . .

The photosensitive drum 101 is driven to rotate counterclockwise as indicated by an arrow by a drive motor. Then, the surface of the photosensitive drum 101 is uniformly charged at the position of the charging unit 104 (charging step). The charging unit 104 may be either contact charging or non-contact charging. After that, the surface of the photosensitive drum 101 reaches the irradiation position of the laser beam 171 emitted from the exposure unit 107, and an electrostatic latent image is formed by exposure scanning at this position (exposure step).

After that, the surface of the photosensitive drum 101 reaches a position facing the developing section 105, and toner is supplied from the developing roller 151 at this position to develop the electrostatic latent image, and the toner image is visualized. (Development process.).

After that, the surface of the photoreceptor drum 101 reaches a position where the intermediate transfer belt 108 and the primary transfer roller 109 face each other, and at this position the toner image on the photoreceptor drum 101 is transferred onto the intermediate transfer belt 108 (1 next transfer step). At this time, a small amount of untransferred toner remains on the photosensitive drum 101 .

After that, the surface of the photoreceptor drum 101 reaches a position facing the cleaning unit 102, and the untransferred toner remaining on the photoreceptor drum 101 at this position is collected into the cleaning unit 102 by the cleaning blade 102a (cleaning unit 102). process).

Finally, the surface of the photoreceptor drum 101 reaches a position facing the static elimination unit, and the residual potential on the photoreceptor drum 101 is removed at this position.

Thus, a series of image forming processes performed on the photosensitive drum 101 are completed.

The intermediate transfer belt unit 115 includes an intermediate transfer belt 108, referring to FIG. The intermediate transfer belt 108 is stretched and stretched by a primary transfer roller 109, a driving roller 112A, a secondary transfer opposing roller 112B, three tension rollers 112C to 112E, a correction roller 113, an outer peripheral surface side tension roller 111, and a cleaning opposing roller 114. Supported. The intermediate transfer belt 108 is rotated by the drive roller 112A. The intermediate transfer belt unit 115 also includes a detection section 180, an intermediate transfer cleaning section 110, and the like.

The intermediate transfer belt 108 runs in the direction of the arrow, and the toner image on the photosensitive drum 101 is primarily transferred at the position of the primary transfer nip of the primary transfer roller 109 .

After that, the intermediate transfer belt 108 to which the toner image has been primarily transferred reaches a position facing a secondary transfer roller 119 as a secondary transfer member. At this position, the secondary transfer facing roller 112B sandwiches the intermediate transfer belt 108 with the secondary transfer roller 119 to form a secondary transfer nip.

Then, the toner image formed on the intermediate transfer belt 108 is transferred onto a sheet material P such as transfer paper conveyed to the position of the secondary transfer nip.

Here, the sheet material P is fed by a feeding device 200 from a feeding unit 126 disposed below the image forming apparatus main body 100 and conveyed via a pair of registration rollers 128 and the like.

A plurality of sheet materials P such as transfer paper are stored in the paper feeding unit 126 in a piled manner. Then, the uppermost sheet material P is fed toward the registration roller pair 128 by the feeding device 200 .

The sheet material P conveyed to the registration roller pair 128 (timing roller pair) temporarily stops at the roller nip position of the registration roller pair 128 whose rotational drive is stopped. Then, the registration roller pair 128 is rotationally driven in synchronization with the image on the intermediate transfer belt 108, the sheet material P is conveyed toward the secondary transfer nip, and the desired image is transferred.

After that, the sheet material P onto which the image has been transferred at the position of the secondary transfer nip is conveyed to the position of the fixing section 120 . At this position, the image transferred to the surface is fixed onto the sheet material P by heat and pressure from the fixing roller and the pressure roller.

Then, the sheet materials P are discharged out of the apparatus main body 100 by the paper discharge roller pair 130 and are sequentially stacked on the stack section 131 .

Next, an example of the feeding device 200 will be described with reference to FIG. FIG. 16 is an explanatory diagram showing an example of the feeding device.

The feeding device 200 has a pickup roller 201 that picks up the sheet material P. As shown in FIG. A feed roller 202 and a separation roller 203 in pressure contact with the feed roller 202 are arranged downstream of the pickup roller 201 , and a conveying roller pair 215 is arranged downstream of the feed roller 202 .

The pickup roller 201, the feed roller 202, and the separation roller 203 are members into which rotating bodies or shafts are inserted. A shaft 207 serving as a driving shaft is inserted into the roller 203 .

The pickup roller 201 sends out the sheet material P placed on the tray of the paper feeding unit 126 to the downstream side. One or more sheets P that have been fed reach between the feed roller 202 and the separation roller 203 . Then, the sheets are separated one by one by the feed roller 202 and the separation roller 203, and sent to the conveying path 224 formed by the conveying guide 222, the housing 220, and the like.

That is, the feed roller 202 is driven to rotate in the direction of feeding the sheet material P to the downstream side, while the separation roller 203 rotates in the opposite direction to the feed roller 202, that is, in the direction to return the sheet material P to the upstream side via the torque limiter. driven.

When there is no sheet material P between the feed roller 202 and the separation roller 203, the feed roller 202 is rotationally driven in the direction of feeding the sheet material P downstream. A driving force is transmitted from the feed roller 202 to the separation roller 203, and the separation roller 203 rotates together with the feed roller 202 by the torque limiter.

When only one sheet material P is sandwiched between the feed roller 202 and the separation roller 203, the sheet material P is sent downstream by rotational driving of the feed roller 202. As shown in FIG. At this time, the driving force is transmitted from the feed roller 202 to the separation roller 203 through the single sheet material P, and the separation roller 203 rotates with the feed roller 202 by the torque limiter.

On the other hand, when a plurality of sheet materials P are sandwiched between the feed roller 202 and the separation roller 203, the sheet materials P slide against each other. , and the other sheet materials P are sequentially returned upstream as the separation roller 203 rotates in the direction in which the sheet materials P are returned.

Accordingly, the sheet materials P can be fed one by one without being fed together.

Next, the three rollers of the feeding device will be described with reference to FIGS. 17 to 19. FIG. FIG. 17 is a perspective explanatory view when the roller of the roller portion is mounted on the shaft, FIG. 18 is a perspective explanatory view of the state where the roller of the roller portion is mounted on the shaft, and FIG. 19 is the roller of the roller portion removed from the shaft. It is a perspective explanatory view of the state when.

The pickup roller 201, the feed roller 202, and the separation roller 203 are members into which a rotating body or a shaft is inserted, as described above, and are provided with the holder portion 14 including the snap-fit portion 43 of the first embodiment on their end faces. ing.

Then, as shown in FIG. 17, the pickup roller 201 is fitted onto the shaft 205, and as shown in FIG. Similarly, the feed roller 202 and the separation roller 203 are fitted on the shaft 206 and the shaft 207, respectively, and are held at the ends of the shafts by the snap-fit portions 43 of the holder portion 14, as shown in FIG.

When replacing the pickup roller 201 , as shown in FIG. 19 , the snap fit portion 43 is operated to disengage the concave portion 31 and the hook portion 44 , and the pickup roller 201 is pulled out from the shaft 205 . Then, a new pickup roller 201 is fitted onto the shaft 205 and held at the end of the shaft by the snap fit portion 43 of the holder portion 14 as shown in FIG. When replacing the feed roller 202 and the separation roller 203, they can be replaced in the same manner.

The rotating body supports rollers (paper feed rollers) related to paper feed, such as the rollers of the above-mentioned feeding device, as well as transport rollers, discharge rollers, fixing rollers, transfer rollers, charging rollers, application rollers, and belts. It can be a roller or the like. Further, in the case where the guide member is held by the shaft, the present invention can be applied by using the guide member as a member into which the shaft is inserted.

REFERENCE SIGNS LIST 1 rotating member 2 rotating body 3 shaft 12 roller holding portion 13 roller portion 14 holder portion (retaining member)
31 recessed portion 32 wall portion 41 attachment portion 42 hinge portion 43 snap fit portion (holding portion, retaining portion)
44 hook portion 45 knob portion 46 hook portion 100 image forming apparatus main body 200 feeding device 201 pickup roller 202 feed roller 203 separation roller 205, 206, 207 shaft

Claims (13)

A rotating body that is detachably attached to the end of a shaft having a recess provided at the end and a projection axially outward of the recess,
a hollow member into which the end of the shaft is inserted;
an outer peripheral member provided on the outer peripheral surface of the hollow member;
a mounting portion attached to an end of the hollow member;
a snap fit portion rotatably held by the mounting portion via a hinge portion;
The snap fit portion has a hook portion detachably hooked to the recess ,
The snap-fit portion is rotatable between a position where the hook portion is elastically deformed to ride over the protrusion , and the hook portion is engaged with the recess, and a position where the hook is disengaged from the recess. A rotating body characterized by: 2. The rotating body according to claim 1, wherein said hook has a claw shape. 3. The body of rotation according to claim 1 , wherein the mounting portion has a hook portion that detachably engages a side of the hinge portion opposite to the fulcrum of rotation. The mounting portion has a plurality of holes into which projections provided on the hollow member are fitted,
4. The body of rotation according to any one of claims 1 to 3, wherein the plurality of holes include holes having different hole diameters and inter-hole distances. In the snap-fit portion , the distance from the rotation fulcrum of the hinge portion to the center position of the hook portion is longer than the distance from the rotation fulcrum of the hinge portion to the center of the hole into which the shaft is inserted. 5. The body of rotation according to any one of claims 1 to 4 . 6. The body of rotation according to claim 1, wherein the snap-fit portion has a knob portion on the side opposite to the side of the hinge portion across the hook portion . 7. The body of rotation according to claim 6 , wherein the color of said knob portion is different from the color of other portions. 8. The rotating body according to claim 6 , wherein the knob is provided obliquely in a direction away from the end surface of the rotating body. 9. The body of rotation according to any one of claims 1 to 8 , wherein the snap fit portion holds a plurality of the hook portions. The rotating body includes a feeding roller for feeding a sheet, a conveying roller for conveying a sheet, a discharge roller for discharging a sheet, a fixing roller for fixing an image on the sheet, a transfer roller for transferring an image to a transfer receiving member, and a charged member. 10. The rotating body according to any one of claims 1 to 9 , wherein the rotating body is at least one of a charging roller for charging, a coating roller for coating a coating agent on a sheet, and a roller for supporting a belt. A member that is detachably attached to the end of a shaft that has a recess at the end and has a projection axially outward of the recess,
a hollow member into which the end of the shaft is inserted;
an outer peripheral member provided on the outer peripheral surface of the hollow member;
a mounting portion attached to an end of the hollow member;
a snap fit portion rotatably held by the mounting portion via a hinge portion;
The snap fit portion has a hook portion detachably hooked to the recess ,
The snap-fit portion is rotatable between a position where the hook portion is elastically deformed to ride over the protrusion , and the hook portion is engaged with the recess, and a position where the hook is disengaged from the recess. A member attached to a shaft, characterized in that: A retainer member that is detachably attached to the end of a shaft having a recess provided at the end and a protrusion axially outward of the recess,
a hollow member into which the end of the shaft is inserted;
an outer peripheral member provided on the outer peripheral surface of the hollow member;
a mounting portion attached to an end of the hollow member;
a snap fit portion rotatably held by the mounting portion via a hinge portion;
The snap fit portion has a hook portion detachably hooked to the recess ,
The snap-fit portion is rotatable between a position where the hook portion is elastically deformed to overcome the protrusion , and the hook portion is engaged with the recess, and a position where the hook is disengaged from the recess. A retaining member characterized by: A device comprising the rotating body according to any one of claims 1 to 10 , the member to be attached to the shaft according to claim 11 , or the retaining member according to claim 12 .

Images