JP2012002948A - Attachment structure, assembly, and image forming apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the central parts in the longitudinal direction of a blade 62 and a metal fitting 68 from being projectingly bent toward the side of a non-contact surface 66G.SOLUTION: One projecting part 72 projecting toward the side of the metal fitting 68 so as to fill a gap S is formed in the central part in the longitudinal direction of the non-contact surface 66G. Thus, when a worker screws a screw 70 into a screw hole 66F, while pressing the central part in the longitudinal direction of the metal fitting 68 by his or her hand, to attach the metal fitting 68 to an attachment surface 66D, the metal fitting 68 is butted against the projecting part 72, even when the metal fitting 68 is pressed toward the side of the non-contact surface 66G. Thus, the central parts in the longitudinal direction of the blade 62 and the metal fitting 68 are suppressed from being projectingly bent toward the side of the non-contact surface 66G.

Description

  The present invention relates to a mounting structure, an assembly, and an image forming apparatus.

  In Patent Document 1, as shown in FIG. 1, a developing housing 1 that opens to face a latent image carrier 9 on which an electrostatic latent image is formed and accommodates a nonmagnetic one-component developer, A developing roll 2 made of a magnetic material which is disposed facing the opening of the developing housing 1 and carries a non-magnetic one-component developer and does not have a magnetic pole inside and on the surface, and one end side of the developing housing 1 are provided. A layer forming member 3 which is positioned and locked to the locked portion 1a and whose free end is disposed in pressure contact with the developing roll 2 to form a developer layer, and is provided on the layer forming member 3 side and layered on the developing roll 2 The structure provided with the magnetic force generation member 4 which press-contacts the formation member 3 with magnetic force is disclosed.

No. 2000-89561 (FIG. 1)

  This invention makes it a subject to suppress that an elastic member and a joining member bend to the attachment member side.

  According to the first aspect of the present invention, there is provided an elastic member having a length on one side, a joining member to which the elastic member is joined and having a length along a length direction of the elastic member, and both ends in the length direction of the joining member. An attachment member to which a part is attached, and an attachment member in which a gap is formed between the joining member and the intermediate part between the both ends in the attachment state of the joining member to the attachment part, and the joining so as to fill the gap And an interposition member interposed between the member and the attachment member.

  According to a second aspect of the present invention, there is provided a transfer body that rotates and an image formed on the outer peripheral surface by a developer is transferred to another member, and has a length in the rotation axis direction of the transfer body. An elastic member that contacts an outer peripheral surface and scrapes off the developer remaining after transfer of the image; a bonding member to which the elastic member is bonded and has a length along a length direction of the elastic member; and the bonding An attachment member having attachment portions to which both ends in the longitudinal direction of the member are attached, and a gap is formed between the joining member and the intermediate portion between the both ends in the attachment state to the attachment portion; And an interposition member interposed between the joining member and the attachment member so as to be embedded in the image forming apparatus main body.

  According to a third aspect of the present invention, there is provided a transfer body that rotates and an image formed on the outer peripheral surface by a developer is transferred to another member, and has a length in the rotation axis direction of the transfer body. An elastic member that contacts an outer peripheral surface and scrapes off the developer remaining after transfer of the image; a bonding member to which the elastic member is bonded and has a length along a length direction of the elastic member; and the bonding An attachment member having attachment portions to which both ends in the longitudinal direction of the member are attached, and a gap is formed between the joining member and the intermediate portion between the both ends in the attachment state to the attachment portion; And an interposition member interposed between the joining member and the mounting member so as to fill in the image forming apparatus.

  According to the structure of Claims 1-3 of this invention, it can suppress that an elastic member and a joining member bend to the attachment member side compared with the structure which does not provide an interposition member.

1 is a schematic diagram illustrating an image forming apparatus according to an exemplary embodiment. 1 is a schematic cross-sectional view showing an image forming unit according to the present embodiment. It is a perspective view which shows the attachment structure which concerns on this embodiment. In the attachment structure concerning this embodiment, it is a perspective view showing the state where a blade was removed. It is a top view which shows the attachment structure which concerns on this embodiment. It is a perspective view which expands and shows the attachment part of the attachment structure which concerns on this embodiment. It is a sectional side view showing the attachment structure concerning this embodiment. It is a top view which shows the attachment operation | work in the attachment structure which concerns on this embodiment. It is a result table | surface which shows the evaluation result of an Example and a comparative example.

(Configuration of image forming apparatus according to the present embodiment)
First, the configuration of the image forming apparatus according to the present embodiment will be described. FIG. 1 is a schematic diagram illustrating a configuration of an image forming apparatus according to the present embodiment. In addition, arrow UP shown in a figure shows the perpendicular direction upper direction.

  As shown in FIG. 1, the image forming apparatus 10 includes an image forming apparatus main body 11 in which each component is housed. Inside the image forming apparatus main body 11, a recording medium accommodating unit 12 that accommodates a recording medium P such as paper, an image forming unit 14 that forms an image on the recording medium P, and the recording medium accommodating unit 12 to the image forming unit. 14, a transport unit 16 that transports the recording medium P to 14, and a control unit 20 that controls the operation of each unit of the image forming apparatus 10. In addition, a recording medium discharge unit 18 for discharging the recording medium P on which an image is formed by the image forming unit 14 is provided on the upper portion of the image forming apparatus main body 11.

  The image forming unit 14 includes image forming units 22Y, 22M, 22C, and 22K (hereinafter referred to as 22Y to 22K) that form toner images of colors of yellow (Y), magenta (M), cyan (C), and black (K). The intermediate transfer belt 24 (an example of a rotating body) to which the toner images formed by the image forming units 22Y to 22K are transferred, and the toner images formed by the image forming units 22Y to 22K to the intermediate transfer belt 24. A first transfer roll 26 as an example of a first transfer member for transferring, and a first image for transferring the toner image transferred to the intermediate transfer belt 24 by the first transfer roll 26 from the intermediate transfer belt 24 to the recording medium P. A second transfer roll 28 as an example of two transfer members, and a toner image transferred from the intermediate transfer belt 24 to the recording medium P by the second transfer roll 28; The recording medium fixing device 30 for fixing the P, and a.

  The image forming units 22 </ b> Y to 22 </ b> K are arranged side by side at the center in the vertical direction of the image forming apparatus 10 along the horizontal direction. Further, the image forming units 22Y to 22K are photoconductors 32 that rotate in one direction (clockwise direction in FIG. 1) as an example of a transfer body on which an image formed on the outer peripheral surface by a developer is transferred to another member. (An example of a rotating body).

  Around each photoconductor 32, a charging roll 34 as an example of a charging device that charges the photoconductor 32 and a photoconductor 32 charged by the charge roll 34 are exposed in order from the upstream side in the rotation direction of the photoconductor 32. A developing device 38 that develops the formed electrostatic latent image to form a toner image, and an elastic member that contacts the outer peripheral surface of the photoconductor 32 and scrapes off the developer remaining on the photoconductor 32 after the image is transferred. The blade 62 is provided.

  Further, below the image forming units 22 </ b> Y to 22 </ b> K, an exposure device 36 that exposes each photosensitive member 32 charged by the charging roll 34 to form an electrostatic latent image is provided. The exposure device 36 is configured to form an electrostatic latent image based on the image signal sent from the control unit 20. Examples of the image signal sent from the control unit 20 include an image signal acquired by the control unit 20 from an external device. 1 and 2, the exposure light from the exposure device 36 is indicated by an arrow L.

  As shown in FIG. 2, the developing device 38 includes a housing 38 </ b> A as an example of a storage unit that stores a developer containing toner. Inside the housing 38A, a developing roll 38B as an example of a rotating rotating body, a regulating member 38C as an example of an elastic member having a length on one side, and a conveying member 38D for conveying the developer are provided. It has been. The restriction member 38C is supported by a support member 38E fixed to the housing 38A.

  In the developing device 38, the conveying member 38D conveys the developer while stirring in the rotation axis direction, and the developer is applied to the developing roll 38B. The developer applied to the developing roller 38B is transported to a position facing the photosensitive member 32 by the rotation of the developing roller 38B, and is supplied to the photosensitive member 32 by electrostatic force or the like.

  The blade 62 is attached to an attachment member 66 (see FIG. 3) provided in the image forming apparatus main body 11 via a metal fitting 68 as an example of a joining member joined to the blade 62. A transport member 64 that transports the developer scraped by the blade 62 is attached to the attachment member 66. Specifically, the transport member 64 transports the developer and discharges it to a waste toner box (not shown). A specific configuration of the attachment structure 60 in which the blade 62 is attached to the attachment member 66 will be described later.

  As shown in FIG. 1, the intermediate transfer belt 24 is formed in an annular shape and is disposed above the image forming units 22 </ b> Y to 22 </ b> K. Winding rolls 42 and 44 around which the intermediate transfer belt 24 is wound are provided on the inner peripheral side of the intermediate transfer belt 24. The intermediate transfer belt 24 circulates (rotates) in one direction (counterclockwise direction in FIG. 1) while being in contact with the photosensitive member 32 when any of the winding rolls 42 and 44 is rotationally driven. ing. The winding roll 42 is an opposing roll that faces the second transfer roll 28.

  The intermediate transfer belt 24 functions as an example of a transfer body on which an image formed on the outer peripheral surface by a developer is transferred to another member. On the outer peripheral side of the intermediate transfer belt 24, a blade 25 is provided as an elastic member that contacts the outer peripheral surface of the intermediate transfer belt 24 and scrapes off the developer remaining on the intermediate transfer belt 24 after image transfer. Yes.

  The first transfer roll 26 faces the photoconductor 32 with the intermediate transfer belt 24 interposed therebetween. A space between the first transfer roll 26 and the photoconductor 32 is a first transfer position where the toner image formed on the photoconductor 32 is transferred to the intermediate transfer belt 24. The first transfer roll 26 is in contact with the intermediate transfer belt 24 and is configured to rotate following the intermediate transfer belt 24 that circulates and moves.

  The second transfer roll 28 faces the winding roll 42 with the intermediate transfer belt 24 interposed therebetween. A space between the second transfer roll 28 and the winding roll 42 is a second transfer position where the toner image transferred to the intermediate transfer belt 24 is transferred to the recording medium P.

  The transport unit 16 is disposed along the transport path 48, a feed roll 46 that feeds the recording medium P accommodated in the recording medium container 12, a transport path 48 that transports the recording medium P sent to the transport roll 46, and the transport path 48. A plurality of transport rolls 50 are provided for transporting the recording medium P delivered by the delivery roll 46 to the second transfer position.

  The fixing device 30 is disposed downstream in the transport direction from the second transfer position, and fixes the toner image transferred at the second transfer position to the recording medium P. A discharge roll 52 that discharges the recording medium P on which the toner image is fixed to the recording medium discharge unit 18 is provided downstream of the fixing device 30 in the transport direction.

  Next, an image forming operation for forming an image on the recording medium P in the image forming apparatus 10 according to the present embodiment will be described.

  In the image forming apparatus 10 according to the present embodiment, the recording medium P sent out from the recording medium container 12 by the sending roll 46 is sent to the second transfer position by the plurality of transport rolls 50.

  On the other hand, in the image forming units 22 </ b> Y to 22 </ b> K, the photosensitive member 32 charged by the charging roll 34 is exposed by the exposure device 36 to form an electrostatic latent image on the photosensitive member 32. The electrostatic latent image is developed by the developing device 38 to form a toner image on the photoreceptor 32. The color toner images formed by the image forming units 22Y to 22K are superimposed on the intermediate transfer belt 24 at the first transfer position to form a color image. Then, the color image formed on the intermediate transfer belt 24 is transferred to the recording medium P at the second transfer position.

  The recording medium P to which the toner image has been transferred is conveyed to the fixing device 30, and the transferred toner image is fixed by the fixing device 30. The recording medium P on which the toner image is fixed is discharged to the recording medium discharge unit 18 by the discharge roll 52. As described above, a series of image forming operations are performed.

(Mounting structure 60 according to this embodiment)
Next, the configuration of the mounting structure 60 according to the present embodiment will be described. FIG. 3 is a schematic perspective view showing the mounting structure 60 according to the present embodiment.

  As shown in FIG. 3, the mounting structure 60 according to the present embodiment includes the above-described blade 62 that contacts the outer peripheral surface of the photoconductor 32 and scrapes off the developer remaining on the photoconductor 32 after the image is transferred. The above-mentioned metal fitting 68 to which 62 is joined, and the above-mentioned attachment member 66 to which the metal fitting 68 is attached are provided.

  The blade 62 is formed in a plate shape (square cross section (see FIG. 2)) and has a length in the direction of the rotation axis of the photoconductor 32. As shown in FIG. 2, specifically, the blade 62 has a plate surface on one end side in the plate thickness direction (left end side in FIG. 2) and one end side in the plate width direction orthogonal to the plate thickness direction and the length direction (see FIG. 2). 2 (the upper end side in FIG. 2) and the corner (edge) formed by the end surface are in contact with the photoconductor 32.

  As the blade 62, for example, urethane rubber or other rubber is used. The material of the blade 62 is not limited to this, and other materials may be used. Specifically, the blade 62 has a plate surface on the other end side in the plate thickness direction (right end side in FIG. 2) bonded to the metal fitting 68 at a portion on the other end side in the plate width direction (lower end side in FIG. 2). ing.

  The metal fitting 68 is comprised with the metal plate (plate-shaped metal). The joining member to be joined to the blade 62 only needs to be made of a material having rigidity (elastic modulus) higher than that of the blade 62. Similar to the blade 62, the metal fitting 68 has a length in the direction of the rotation axis of the photoconductor 32, as shown in FIG. Further, as shown in FIG. 2, the metal fitting 68 is bent, and at the one end side in the plate width direction (upper end side in FIG. 2) of the plate surface on the one end side in the plate thickness direction (left end side in FIG. 2). In part, the blade 62 is bonded.

  As shown in FIG. 4, insertion holes 68 </ b> A into which pins 66 </ b> E formed on the attachment member 66 are inserted and screws 70 as fixing members are inserted through both ends of the metal fitting 68 in the length direction. A hole 68B is formed. The insertion hole 68A is disposed on the blade 62 side (upper side in FIG. 4) in the plate width direction of the metal fitting 68 with respect to the through hole 68B. At least one of the two insertion holes 68 </ b> A is a long hole having a length along the length direction of the metal fitting 68. Thereby, an error between the dimension between the two insertion holes 68A and the dimension between the two pins 66E is absorbed.

  As shown in FIGS. 3 and 5, the mounting member 66 is opposed to the outer peripheral surface of the photoconductor 32 and has a length in the rotation axis direction of the photoconductor 32, and the length of the mounting member main body 66A. And support portions 66B that are provided at both ends in the direction and rotatably support both ends in the axial direction of the photoconductor 32. The support portion 66B protrudes from the mounting member main body 66A toward the photoconductor 32 and is formed in a substantially U shape. Specifically, the support portion 66B is configured to rotatably support the photoconductor 32 via a bearing (not shown) provided on the inner periphery of the support portion 66B. As shown in FIGS. 2 and 4, the attachment member main body 66 </ b> A is formed with an accommodation space 66 </ b> H that accommodates a conveyance member 64 that conveys the developer scraped by the blade 62.

  As shown in FIGS. 4 and 6 (partially enlarged view), an attachment surface 66D as an example of an attachment portion to which the metal fitting 68 is attached is formed on both ends in the length direction of the attachment member main body 66A, and the attachment surface 66D. And a screw hole 66F formed in the mounting surface 66D. The metal fitting 68 is attached to the attachment surface 66D in a state where the surface of the metal fitting 68 opposite to the surface to which the blade 62 is bonded is in contact.

  Between the mounting surfaces 66D at both ends in the length direction of the mounting member main body 66A, when the metal fitting 68 is attached to the mounting surface 66D (in a contact state), it is separated from the metal fitting 68 and is not in contact. A non-contact surface 66G is formed. That is, the non-contact surface 66G is formed to be retracted (retracted) from the attachment surface 66D by one step, and in the state where the metal fitting 68 is attached to the attachment surface 66D, an intermediate portion between both longitudinal ends of the metal fitting 68 is provided. A gap S (see FIG. 7) is formed between the two.

  As described above, the metal fitting 68 is attached to the attachment member 66 while only the both ends in the length direction are in contact with the attachment surface 66D in a state where there is a gap S between the central portion in the length direction and the non-contact surface 66G. It has become. That is, the attachment surface 66D serves as a reference surface for positioning the blade 62 with respect to the photoreceptor 32. By so doing, the error of the dimensional accuracy of the metal fitting 68 and the error of the dimensional accuracy of the mounting member 66 that are unique to each component are absorbed, and variations in the contact state of the blade 62 with the photoreceptor 32 are suppressed.

  As shown in FIGS. 4 and 7, the non-contact surface 66G is not in contact with the metal fitting 68 so as to fill a part of the gap S (specifically, a part in the length direction) as shown in FIGS. As an example of the interposition member interposed between the surface 66G, one convex portion 72 protruding to the attachment surface 66D side (the upper side in FIG. 7) is formed. The convex portion 72 has the same height as the mounting surface 66D.

  In addition, the convex part 72 may be made into the height lower than the height of the attachment surface 66D. In this configuration, the metal fitting 68 and the convex portion 72 are not in contact with each other in a state where the metal fitting 68 and the blade 62 are not bent convexly toward the non-contact surface 66G.

  Moreover, the convex part 72 may be provided with two or more along the length direction of the non-contact surface 66G. Further, the convex portion 72 may be formed not on the attachment member 66 but on the metal fitting 68 so as to protrude toward the attachment member 66. The convex portion 72 may be hollow or solid. Moreover, the convex part 72 may be integrally formed with respect to the attachment member main body 66A, and may be joined with respect to the attachment member main body 66A. Further, the convex portion 72 may be a position shifted from the central portion in the length direction of the non-contact surface 66G, and may be disposed at a part of the length direction of the non-contact surface 66G.

  In the present embodiment, the metal fitting 68 to which the blade 62 is joined and the attachment member 66 to which the photoconductor 32 is attached are detachably attached to the image forming apparatus main body 11, and are attached to the image forming apparatus main body 11. An example of an assembly (process cartridge) assembled in a detachable manner is provided. The attachment member 66 may be configured to be attached to and detached from the image forming apparatus main body 11 independently of the photoconductor 32. The assembly only needs to include at least the metal fitting 68 to which the blade 62 is joined, the photosensitive member 32, and the mounting member 66. However, the charging roll 34, the developing device 38, and the exposure device that constitute the image forming units 22Y to 22K. 36 may be included.

(Operation according to this embodiment)
Next, as an operation according to the present embodiment, an attaching operation of the metal fitting 68 to which the blade 62 is joined will be described.

  First, the operator places both ends in the length direction of the metal fitting 68 on the attachment surface 66D so that the pins 66E of the attachment member 66 are inserted into the insertion holes 68A of the metal fitting 68 to which the blade 62 is joined. When the pin 66E of the attachment member 66 is inserted into the insertion hole 68A of the metal fitting 68, the metal fitting 68 is temporarily fixed to the attachment surface 66D. That is, the position in the length direction of the metal fitting 68 and the blade 62 and the position in the width direction of the metal fitting 68 and the blade 62 are determined with respect to the mounting surface 66D.

  Next, as shown in FIG. 8, the operator inserts the screw 70 into the through hole 68B of the metal fitting 68 and presses it into the screw hole 66F of the attachment surface 66D while holding the blade 62 and the metal fitting 68 by hand. Thereby, the metal fitting 68 is fixed and attached to the attachment surface 66D.

  In the present embodiment, when the blade 62 and the metal fitting 68 are pressed by hand (see arrow F in FIG. 7), even if the longitudinal center portion of the metal fitting 68 is pushed to the non-contact surface 66G side, the metal fitting 68 is convex. It hits. Thereby, it is suppressed that the longitudinal direction center part of the braid | blade 62 and the metal fitting 68 bends convexly to the non-contact surface 66G side. Accordingly, the blade 62 and the metal fitting 68 are restrained from being attached to the attachment member 66 in a bent state, and the contact pressure of the blade 62 with respect to the photoconductor 32 is less likely to vary in the rotation axis direction of the photoconductor 32.

  Even when the image forming apparatus 10 is operated after the blade 62 is attached to the attachment member 66 via the metal fitting 68, even if the metal fitting 68 is pushed to the non-contact surface 66G side due to vibration or the like, The metal fitting 68 hits the convex portion 72. Thereby, it is suppressed that the longitudinal direction center part of the braid | blade 62 and the metal fitting 68 bends convexly to the non-contact surface 66G side. That is, it is possible to prevent the blade 62 and the metal fitting 68 from being bent with time not only when the metal fitting 68 is attached to the attachment member 66 but also after the metal fitting 68 is attached.

  In the present embodiment, in the metal fitting 68, the portion temporarily fixed by the pin 66E is one at each of both ends in the length direction, but may be at a plurality of locations at each of both ends in the length direction. Good.

  Further, in the present embodiment, in the metal fitting 68, the portion fixed by the screw 70 is one at each of both ends in the length direction, but may be plural at each of both ends in the length direction. .

  Further, the attachment structure 60 according to the present embodiment may be applied to attachment of the blade 25 for scraping off the developer remaining on the intermediate transfer belt 24 and attachment of the regulating member 38C of the developing device 38.

[Example]
Hereinafter, the present invention will be specifically described with reference to examples and comparative examples. However, it is not limited to these. For this example and comparative example, 30 samples were prepared, and the amount of biting of the blade 62 with respect to the photosensitive member 32 by a stop gauge (Go / No Go gauge) was measured at one end in the longitudinal direction, at the center in the longitudinal direction, and in the longitudinal direction. Measured at the edge. And the process capability index was calculated from this measured value (refer to the result table in FIG. 9).

Example 1
In the first embodiment, a convex portion 72 is provided at one central portion in the longitudinal direction of the non-contact surface 66G, and a blade 62 having a lengthwise dimension of A4 size is adhered to the metal fitting 68 to It attached to the attachment surface 66D. The height of the protrusion 72 with respect to the non-contact surface 66G is set to 0.2 mm, which is the same as the height of the mounting surface 66D with respect to the non-contact surface 66G.

(Example 2)
In the second embodiment, the protrusions 72 are provided at two locations in the central portion in the length direction of the non-contact surface 66G, and the blade 62 having a size in the length direction of A3 size is adhered to the metal fitting 68. It attached to the attachment surface 66D. The height of the protrusion 72 with respect to the non-contact surface 66G is set to 0.5 mm, which is the same as the height of the mounting surface 66D with respect to the non-contact surface 66G.

(Comparative example)
In the comparative example, the protrusions 72 were not provided on the non-contact surface 66G, and a blade 62 having a length dimension of A3 size was adhered to the metal fitting 68 and attached to the attachment surface 66D of the attachment member 66. The height of the mounting surface 66D with respect to the non-contact surface 66G is 0.5 mm.

  When the process capability index was calculated for the example and the comparative example, as shown in the result table of FIG. 9, in the comparative example, the longitudinal direction one end 1.31, the longitudinal central portion 1.091, the longitudinal other end 1. .223 is improved in the first embodiment with a longitudinal end portion 1.316, a longitudinal central portion 1.315, and a longitudinal other end portion 1.322. It was improved to 1.320, the longitudinal center portion 1.319, and the other longitudinal end portion 1.316.

  The present invention is not limited to the above-described embodiment, and various modifications, changes, and improvements can be made.

10 Image forming apparatus 25 Blade (an example of an elastic member)
32 Photoconductor (an example of a transfer member)
38C regulating member (an example of an elastic member)
60 Mounting structure 62 Blade (an example of an elastic member)
66 Mounting member 66D Mounting surface (an example of mounting section)
68 Bracket (Example of joining member)
72 convex part (an example of an interposition member)
S clearance

Claims (3)

An elastic member having a length to one side;
The elastic member is joined, and a joining member having a length along the length direction of the elastic member;
An attachment member having attachment portions to which both end portions in the length direction of the joining member are attached, and a gap formed between the joining member and the intermediate portion between the both end portions in the attachment state to the attachment portion;
An interposition member interposed between the joining member and the mounting member so as to fill the gap;
Mounting structure comprising. A transfer body that rotates and an image formed on the outer peripheral surface by the developer is transferred to another member;
An elastic member having a length in the rotation axis direction of the transfer body, and scraping off the developer remaining after transfer of the image in contact with the outer peripheral surface of the transfer body;
The elastic member is joined, and a joining member having a length along the length direction of the elastic member;
An attachment member having attachment portions to which both end portions in the length direction of the joining member are attached, and a gap formed between the joining member and the intermediate portion between the both end portions in the attachment state to the attachment portion;
An interposition member interposed between the joining member and the mounting member so as to fill the gap;
And an assembly that is detachably assembled to the main body of the image forming apparatus. A transfer body that rotates and an image formed on the outer peripheral surface by the developer is transferred to another member;
An elastic member having a length in the rotation axis direction of the transfer body, and scraping off the developer remaining after transfer of the image in contact with the outer peripheral surface of the transfer body;
The elastic member is joined, and a joining member having a length along the length direction of the elastic member;
An attachment member having attachment portions to which both end portions in the length direction of the joining member are attached, and a gap formed between the joining member and the intermediate portion between the both end portions in the attachment state to the attachment portion;
An interposition member interposed between the joining member and the mounting member so as to fill the gap;
An image forming apparatus comprising:

Images