Mounting member, barrel member, and image forming apparatus

Abstract

To obtain a mounting member with which a sheet member is not easily peeled off from an attachment part, compared with a case where only a first surface of the attachment part is adhered to the sheet member.SOLUTION: A mounting member 90 is a mounting member that is mounted on a barrel main body 52 that moves in a forward direction, and has a rectangular sheet member 100, and an attachment part 110 that has a first surface 110A adhered to one end 100A of a rear face 151 of the sheet member 100 at a downstream side part in the forward direction, and is removably attached to a base part 300, the attachment part 110 having a second surface 110B different in direction from the first surface 110A adhered to the sheet member 100.SELECTED DRAWING: Figure 10

Description

Technical Field

[0001] The present invention relates to a mounting member, a body member, and an image forming apparatus.

Background Art

[0002] Patent Document 1 below discloses an image forming apparatus including a latent image carrier, a latent image forming unit that forms a latent image on the surface of the latent image carrier, a developing unit that develops the latent image on the latent image carrier with a developer to form a toner image, an intermediate transfer member that moves while contacting the latent image carrier at a primary transfer position facing the latent image carrier and to which the toner image on the latent image carrier is transferred, and a secondary transfer unit that conveys a transfer material so as to move while contacting the intermediate transfer member at a secondary transfer position facing the intermediate transfer member and transfers the toner image on the intermediate transfer member to the surface of the transfer material. In the image forming apparatus, a concave or convex surface dividing portion extending in a direction intersecting the surface movement direction is formed on at least one surface of the image carrier and the intermediate transfer member, and the surface dividing portion is configured not to pass through the primary transfer position when the latent image forming unit forms a latent image on the surface of the latent image carrier.

[0003] Patent Document 2 below discloses a transfer device having a conductive elastic member that supports a transfer material, a transfer material peeling member that peels the transfer material from the elastic member, an elastic member support portion that supports the elastic member, and a peeling member support portion that supports the transfer material peeling member, and further having a conductive support member, a transfer bias applying portion that is electrically connected to the support member and applies a transfer bias, a conductive flange disposed at an end of the support member, and a connection portion that electrically connects the transfer bias applying portion and the flange.

[0004] Patent Document 3 below discloses a transfer device including an image carrier on which an image is carried, a cleaning unit that contacts and cleans the image carrier, a first driving unit that drives the image carrier, a transfer roller having a cylindrical portion, a recess formed in the axial direction of the cylindrical portion, and a transfer material support portion that is fixed in the recess and supports a transfer material, and a second driving unit that drives the transfer roller.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0006] An object of the present disclosure is to obtain a mounting member, a body member, and an image forming apparatus in which a sheet member is less likely to be peeled off from a mounting portion as compared with a case where only the first surface of the mounting portion is adhered to the sheet member.

Means for Solving the Problems

[0007] The mounting member according to the first aspect is a mounting member mounted on a member that moves in the traveling direction, and includes a rectangular sheet member, and a mounting portion having a first surface adhered to one end portion of the back surface of the downstream side portion of the sheet member in the traveling direction and being removably attached to a portion to be attached, wherein a surface having a different orientation from the first surface is adhered to the sheet member.

[0008] The mounting member according to the second aspect is the mounting member according to the first aspect, wherein a part of the sheet member intersects the first surface in the mounting portion and wraps around to the side of a second surface facing the downstream side in the advancing direction of the sheet member, and the wrapping portion is adhered to the second surface.

[0009] The mounting member according to the third aspect is the mounting member according to the second aspect, wherein the wrapping portion wraps around from the second surface in the mounting portion to the side of a third surface opposite to the first surface, and the third surface is adhered to the wrapping portion.

[0010] The mounting member according to the fourth aspect is the mounting member according to any one of the first to third aspects, wherein the sheet member is more easily elastically deformed than the member to be mounted.

[0011] The mounting member according to the fifth aspect is the mounting member according to the fourth aspect, wherein the sheet member has a plurality of layers.

[0012] The mounting member according to the sixth aspect is the mounting member according to the fifth aspect, wherein one of the plurality of layers of the sheet member is adhered to a surface having a different orientation from the first surface of the mounting portion.

[0013] The mounting member according to the seventh aspect is the mounting member according to the sixth aspect, wherein the sheet member includes a foamed rubber layer, and the one layer harder than the foamed rubber layer is adhered to a surface having a different orientation from the first surface of the mounting portion.

[0014] The mounting member according to the eighth aspect is the mounting member according to any one of the first to seventh aspects, wherein the mounting portion is a plate-shaped metal member.

[0015] The body member according to the ninth aspect includes a recessed portion along the axial direction, and has a substantially circular cross-sectional shape of a body main body configured to rotate in the circumferential direction and the opening edge portion on the upstream side in the rotation direction in the recessed portion hits another member due to the rotation, and a mounting member according to any one of the first to eighth aspects wound around the outer peripheral surface of the body main body excluding the recessed portion, and the attached portion is provided at a portion on the upstream side in the rotation direction of the outer peripheral surface of the body main body with respect to the recessed portion, and the mounting portion is attached to the attached portion in a state where the mounting portion is disposed on the radially outer side of the attached portion.

[0016] The body member according to the tenth aspect is the body member according to the ninth aspect, wherein both end portions of the mounting portion in the axial direction of the body main body are attached to the attached portion by fixing a fixture from the radial direction of the attached portion.

[0017] The image forming apparatus according to the eleventh aspect includes the body member according to the ninth or tenth aspect that conveys a recording medium, and a transfer member that contacts the body member via an intermediate transfer body and transfers an image formed on the intermediate transfer body to the recording medium conveyed by the body member.

Advantages of the Invention

[0018] According to the mounting member according to the first aspect, the sheet member is less likely to be peeled off from the mounting portion as compared with the case where only the first surface of the mounting portion is adhered to the sheet member.

[0019] According to the mounting member according to the second aspect, the sheet member is less likely to be peeled off from the mounting portion as compared with the case where the recessed portion is adhered to a surface other than the surface facing the advancing direction of the mounting portion.

[0020] According to the mounting member according to the third aspect, the sheet member is less likely to be peeled off from the mounting portion as compared with the case where only the third surface on the opposite side of the first surface of the mounting portion is adhered to the recessed portion of the sheet member.

[0021] According to the mounting member according to the fourth aspect, the performance of the mounting member is stabilized as compared with the case where the seat member is composed only of a member harder than the attached portion.

[0022] According to the mounting member according to the fifth aspect, it is easier to add functions as compared with the case where the seat member is single-layered.

[0023] According to the mounting member according to the sixth aspect, manufacturing becomes easier as compared with the case where two or more layers of the seat member are adhered to a surface facing different from the first surface of the attachment portion.

[0024] According to the mounting member according to the seventh aspect, peeling of the seat member from the attachment portion is suppressed as compared with the case where the foamed rubber layer is adhered to a surface facing different from the first surface of the attachment portion.

[0025] According to the mounting member according to the eighth aspect, manufacturing is easier as compared with the case where the attachment portion is a block-shaped member.

[0026] According to the body member according to the ninth aspect, the seat member is less likely to peel off from the attachment portion as compared with the case where only the first surface of the attachment portion is adhered to the seat member.

[0027] According to the body member according to the tenth aspect, when the attachment portion is fixed to the attached portion with a fixture, the operator's hand is more accessible as compared with the case where the attachment portion is attached to the attached portion from the side of the side surface of the recessed portion.

[0028] According to the image forming apparatus according to the eleventh aspect, when the vicinity of the attachment portion of the seat member hits the transfer member due to the rotation of the body member, the seat member is less likely to peel off from the attachment portion as compared with the case where only the first surface of the attachment portion is adhered to the seat member.

Brief Description of the Drawings

[0029]

Figure 1

Figure 2

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Figure 8

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Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

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Figure 16

Figure 17

Figure 18

Embodiments for Carrying Out the Invention

[0030] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. For convenience of explanation, the direction along the arrow H shown in FIG. 1 is defined as the vertical direction of the image forming apparatus 10, the direction along the arrow W is defined as the width direction of the image forming apparatus 10, and the direction along the arrow D is defined as the front-rear direction of the image forming apparatus 10.

[0031] [First Embodiment] First, an example of the image forming apparatus 10 to which the mounting member of the first embodiment is applied will be described. As shown in FIG. 1, the image forming apparatus 10 is, for example, an electrophotographic system for forming an image on a recording medium P. The image forming apparatus 10 includes an image forming unit 12, a conveyance unit 14, and a fixing device 70.

[0032] Hereinafter, the image forming unit 12, the conveyance unit 14, and the fixing device 70 of the image forming apparatus 10 will be described, and then a transfer drum 50 as an example of a body member will be described.

[0033] (Image Forming Unit) As shown in FIG. 1, the image forming unit 12 has a function of forming a toner image (an example of an image) of each color on the recording medium P. More specifically, the image forming unit 12 includes a toner image forming unit 80 that forms a toner image (an example of an image) of each color, a transfer belt 30 as an example of an intermediate transfer member, a plurality (two in this embodiment) of rolls 22, a counter roll 24 as an example of a transfer member, and a transfer body 40. The transfer belt 30 and the counter roll 24 are examples of other members.

[0034] The transfer belt 30 is formed in an endless shape and is wound around the two rolls 22 and the counter roll 24 so as to have an inverted triangular shape when viewed from the front-rear direction. The transfer belt 30 is configured to circulate in the direction of arrow A by rotationally driving at least one of the two rolls 22.

[0035] The toner image forming units 80 are provided in plural so as to form toner images for each color. In the present embodiment, four-color toner image forming units 80 for yellow (Y), magenta (M), cyan (C), and black (K) are provided. In FIG. 1, English letters Y, M, C, and K are attached after the reference numeral 80 corresponding to each of the above colors.

[0036] Each of the toner image forming units 80 (80Y, 80M, 80C, 80K) for each color has a columnar photosensitive member 82 that rotates in one direction (the direction of arrow B). Around each photosensitive member 82, a charger 84, an exposure device 86, and a developing device 88 are arranged in this order from the upstream side in the rotation direction of the photosensitive member 82.

[0037] In each of the toner image forming units 80 for each color, the charger 84 charges the surface of the photosensitive member 82, and the exposure device 86 exposes the surface of the photosensitive member 82 charged by the charger 84 to form an electrostatic latent image on the surface of the photosensitive member 82. Then, the developing device 88 develops the electrostatic latent image formed on the surface of the photosensitive member 82 by the exposure device 86 to form a toner image.

[0038] Note that on the inner peripheral surface side of the transfer belt 30, a primary transfer roll 78 is provided facing each photosensitive member 82 with the transfer belt 30 interposed therebetween. The toner images formed by the toner image forming units 80 for each color are sequentially primary-transferred onto the transfer belt 30 and superimposed at the primary transfer position T1 where the primary transfer roll 78 is provided, and the superimposed toner images are secondary-transferred onto the recording medium P at the secondary transfer position T2.

[0039] The transfer member 40 is disposed below the transfer belt 30. As shown in FIG. 2, the transfer member 40 has a transfer cylinder 50 disposed such that the axial direction thereof is the same as the axial direction of the opposing roll 24. The transfer cylinder 50 is disposed facing the transfer belt 30, and is configured such that a sandwiching region where the transfer belt 30 is sandwiched between the opposing roll 24 and the transfer cylinder 50 becomes the secondary transfer position T2. At the secondary transfer position T2, a transfer voltage is applied between the opposing roll 24 and the transfer cylinder 50, whereby the toner image on the transfer belt 30 is secondary-transferred onto the recording medium P.

[0040] In FIG. 1, the conveyance direction of the recording medium P is indicated by an arrow X. Further, a cleaner for removing toner remaining on the transfer belt 30 may be provided on the downstream side in the belt circumferential direction with respect to the secondary transfer position T2 and on the upstream side in the belt circumferential direction with respect to the toner image forming units 80 (80Y, 80M, 80C, 80K).

[0041] As shown in FIG. 2, a concave portion 54 for accommodating a gripper 36 and a support member 38, which will be described later, is formed in a part of the outer peripheral surface of the transfer cylinder 50. A pair of sprockets 32 are provided on both axial ends of the transfer cylinder 50. The pair of sprockets 32 are arranged coaxially with the transfer cylinder 50 and are configured to rotate integrally with the transfer cylinder 50. The transfer cylinder 50 is configured to be rotationally driven by a drive unit (not shown). Further, a chain 34, which will be described later, is wound around the pair of sprockets 32.

[0042] Note that the opposing roll 24 is movable between a contact position where it contacts the transfer cylinder 50 and a separation position where it is separated from the transfer cylinder 50 by a transfer movement mechanism (not shown) using a cam or the like. Specifically, the opposing roll 24 is constantly pressed or pulled toward the contact position by the elastic force of an elastic member such as a spring, and is configured to move to the separation position against the elastic force by the transfer movement mechanism.

[0043] (Fixing device) As shown in FIG. 1, the fixing device 70 is a device that fixes the toner image transferred onto the recording medium P to the recording medium P. Specifically, the fixing device 70 includes a pressure member 42 disposed on the downstream side in the conveyance direction of the recording medium P in the conveyance unit 14 and a heating roll 72.

[0044] As shown in FIG. 3, the pressing member 42 has a pressing roll 44 arranged such that its axial direction is the same as the axial direction of the transfer cylinder 50. A pair of sprockets 48 are provided on both axial ends of the pressing roll 44. This pair of sprockets 48 is arranged coaxially with the pressing roll 44 and is configured to rotate integrally with the pressing roll 44. And a chain 34, which will be described later, is wound around the pair of sprockets 48.

[0045] As shown in FIG. 1, the heating roll 72 and the pressing roll 44 are arranged side by side vertically. That is, the heating roll 72 is arranged above the pressing roll 44. This heating roll 72 has a heating source 72A (see FIG. 1) such as a halogen lamp inside. In the following, the position where the recording medium P is sandwiched between the heating roll 72 and the pressing roll 44 is referred to as the sandwiching position NP.

[0046] Further, the heating roll 72 is movable between a contact position where it contacts the pressing roll 44 and a separation position where it is separated from the pressing roll 44 by a fixing movement mechanism (not shown) using a cam or the like. Specifically, the heating roll 72 is always pressed or pulled toward the contact position by the elastic force of an elastic member such as a spring, and is configured to move to the separation position against the elastic force by the fixing movement mechanism. And the heating roll 72 is configured to sandwich the recording medium P with the pressing roll 44 at the contact position.

[0047] In this embodiment, the heating roll 72 is configured to be rotationally driven and the pressing roll 44 is configured to rotate passively, but both the heating roll 72 and the pressing roll 44 may be configured to be rotationally driven. Also, a recess 46 for accommodating a gripper 36 and a support member 38, which will be described later, is formed in a part of the outer peripheral surface of the pressing roll 44.

[0048] (Conveying unit) As shown in FIGS. 1 to 3, the conveyance unit 14 has a function of conveying the recording medium P and passing it through the secondary transfer position T2 and the sandwiching position NP. The conveyance unit 14 has a pair of chains 34 and grippers 36. The pair of chains 34 is an example of a driving force transmission member, and the gripper 36 is an example of a holding member that holds the leading end portion of the recording medium P. Note that in FIG. 1, the chains 34 and the grippers 36 are shown in a simplified manner.

[0049] As shown in FIG. 1, each of the pair of chains 34 is formed in an annular shape. Then, as shown in FIGS. 2 and 3, the pair of chains 34 are arranged at intervals in the depth direction of the apparatus. That is, the pair of chains 34 are wound around a pair of sprockets 32 provided coaxially with the transfer cylinder 50 and a pair of sprockets 48 provided coaxially with the pressure roll 44, respectively.

[0050] When the transfer cylinder 50 is rotationally driven by a drive unit (not shown), the pair of sprockets 32 are integrally rotationally driven in the rotational direction B (direction of arrow B), so that the chain 34 circulates in the circumferential direction C (direction of arrow C). Further, the pressure roll 44 is thereby driven to rotate passively. That is, the rotational driving force of the transfer cylinder 50 is transmitted to the pressure roll 44 by the pair of chains 34 that circulate in the circumferential direction C (see FIG. 1).

[0051] Also, as shown in FIGS. 2 and 3, a support member 38 to which the gripper 36 is attached is bridged along the depth direction of the apparatus between the pair of chains 34. A plurality (three in the example shown in FIG. 1) of support members 38 are provided, and each support member 38 is fixed to the pair of chains 34 at a predetermined interval along the circumferential direction (circumferential direction C) of the chain 34.

[0052] Also, a plurality of grippers 36 are arranged side by side and attached to each support member 38 at a predetermined interval along the depth direction of the apparatus. That is, each gripper 36 is attached to the chain 34 via each support member 38. And each gripper 36 has a holding function of holding the leading end portion of the recording medium P.

[0053] Specifically, as shown in FIG. 4, the gripper 36 has a plurality of claws 36A and a plurality of claw bases 36B. The gripper 36 is configured to hold the recording medium P by sandwiching the leading end portion of the recording medium P between each claw 36A and each claw base 36B. Therefore, the gripper 36 can be said to be an example of a sandwiching portion that sandwiches the recording medium P in the thickness direction.

[0054] Also, the gripper 36 is disposed on the downstream side in the conveyance direction with respect to the recording medium P, and is configured to hold the leading end portion of the recording medium P from the downstream side in the conveyance direction of the recording medium P. Note that the gripper 36 is configured such that, for example, the claw 36A is pressed against the claw base 36B by a spring or the like, and the claw 36A is separated from the claw base 36B by the action of a cam or the like.

[0055] In this way, in the conveyance unit 14, the leading end portion of the recording medium P sent from a storage portion (not shown) is held by the gripper 36. Then, in the conveyance unit 14, with the gripper 36 holding the leading end portion of the recording medium P, the chain 34 rotates in the circumferential direction C, thereby moving the gripper 36 to convey the recording medium P, and passing the secondary transfer position T2 together with the gripper 36 while the gripper 36 holds the recording medium P.

[0056] Note that in the portion where the chain 34 is wound around the sprocket 32, the gripper 36 is moved in the rotation direction of the transfer cylinder 50 integrally with the transfer cylinder 50 while being accommodated in the concave portion 54 of the transfer cylinder 50. Similarly, in the portion where the chain 34 is wound around the sprocket 48, the gripper 36 is moved in the rotation direction of the pressure roll 44 integrally with the pressure roll 44 while being accommodated in the concave portion 46 of the pressure roll 44.

[0057] Here, in this embodiment, the transport unit 14 is configured to transport the recording medium P while the gripper 36 holds the leading end portion of the recording medium P toward the sandwiching position NP in a state where the heating roll 72 is located at the separated position. Then, when the transport unit 14 transports the recording medium P to the sandwiching position NP, it releases the holding of the leading end portion of the recording medium P.

[0058] That is, the transport unit 14 is configured to release the holding of the leading end portion of the recording medium P after the gripper 36 passes through the sandwiching position NP. At this time, the pressing roll 44 is configured to maintain a rotating state, in other words, a state where the chain 34 is moving in a circular motion.

[0059] Also, the fact that the recording medium P has been transported to the sandwiching position NP is detected by the time after the detection unit provided on the upstream side in the transport direction of the sandwiching position NP detects the leading end of the recording medium P. Note that the detection target of the detection unit may be the support member 38 or the gripper 36 instead of the leading end of the recording medium P.

[0060] Further, after the gripper 36 passes through the sandwiching position NP and after the holding of the leading end portion of the recording medium P by the gripper 36 is released, the heating roll 72 starts to move from the separated position to the contact position and sandwiches the recording medium P transported to the sandwiching position NP with the pressing roll 44. Then, with the recording medium P sandwiched between the heating roll 72 and the pressing roll 44, the heating roll 72 starts to rotate to transport the recording medium P.

[0061] Note that the heating roll 72 may start to move from the separated position to the contact position before the holding of the leading end portion of the recording medium P by the gripper 36 is released, as long as the sandwiching of the recording medium P by the heating roll 72 and the pressing roll 44 is completed after the holding of the leading end portion of the recording medium P by the gripper 36 is released.

[0062] Thus, in the fixing device 70, while conveying the recording medium P in a state where the recording medium P is sandwiched between the heating roll 72 and the pressure roll 44, the toner image transferred onto the recording medium P is fixed to the recording medium P by heating and pressing the recording medium P.

[0063] (Transfer cylinder) Next, the transfer cylinder 50 will be described.

[0064] As shown in FIGS. 5 and 9, the transfer cylinder 50 includes a cylinder main body 52 and a mounting member 90 wound around the cylinder main body 52. The mounting member 90 includes a sheet member 100 having a rectangular shape in plan view. The transfer cylinder 50 is an example of a member that moves in the traveling direction. Further, the transfer cylinder 50 is an example of a cylinder member. In the following, the axial direction, radial direction, and circumferential direction of the cylinder main body 52 may be simply expressed as the "axial direction", "radial direction", and "circumferential direction", respectively.

[0065] Also, hereinafter, the upstream in the rotational direction (arrow B direction) of the transfer cylinder 50 may be simply expressed as "upstream", and the downstream in the rotational direction (arrow B direction) of the transfer cylinder 50 may be simply expressed as "downstream". The rotational direction is an example of the traveling direction of the mounting member 90. When the circumferential direction and the axial direction are used in the description of the mounting member 90, it is the direction in the state where the mounting member 90 is wound around the cylinder main body 52. Further, the direction along the short side of the sheet member 100 having a rectangular shape in plan view of the mounting member 90 is defined as the width direction, and the direction along the long side is defined as the length direction.

[0066] A single concave portion 54 is formed along the axial direction in a part of the circumferential direction of the cylinder main body 52, and the cross section is substantially circular, specifically, the outer shape of the cross section orthogonal to the axial direction is formed in a substantially circular shape. The concave portion 54 as an example of the recessed portion has a depth along the radial direction of the cylinder main body 52. Further, the cylinder main body 52 is formed of a metal material such as stainless steel or aluminum. In the present embodiment, the depth direction of the concave portion 54 coincides with the radial direction. However, it is not necessary for the depth direction and the radial direction to coincide. The depth direction may be inclined by, for example, about 5° to 10° with respect to the radial direction.

[0067] The body main body 52 is formed such that the length along its axial direction is longer than the width along the axial direction of the sheet member 100, and the sheet member 100 is wound around the body main body 52 with the central portion in its width direction aligned with the central portion in the axial direction of the body main body 52. Note that the width of the sheet member 100 is larger than the maximum width of the recording medium P (see FIG. 4).

[0068] The sheet member 100 is composed of a sheet-like plate-like body. The term "sheet-like" refers to a shape such as a thin plate and a thickness that can be deformed along the outer periphery of the body main body 52. The thickness of the sheet member 100 is preferably 3 mm or more and 15 mm or less, more preferably 4 mm or more and 12 mm or less, and even more preferably 5 mm or more and 10 mm or less. The length of the sheet member 100 in the circumferential direction (length direction) is substantially the same as the length of the body main body 52 in the circumferential direction excluding the concave portion 54.

[0069] As shown in FIGS. 5, 6, 8, 9, and 11, the mounting member 90 includes a mounting portion 110 provided at one end portion 100A in the length direction of the sheet member 100. The mounting portion 110 has a function of attaching the one end portion 100A side of the sheet member 100 in the mounting member 90 to the base portion 300 of the transfer cylinder 50. The mounting portion 110 is provided at one end portion 100A of the back surface 151 in the downstream portion in the rotation direction of the sheet member 100. In other words, the mounting portion 110 is disposed upstream in the rotation direction with respect to the concave portion 54 of the transfer cylinder 50 in a state where the sheet member 100 is wound around the outer peripheral surface of the transfer cylinder 50.

[0070] As shown in FIG. 10, the sheet member 100 has a plurality of layers. As an example, the sheet member 100 has a three-layer structure. In the present embodiment, the sheet member 100 has a metal layer 150 that is wound in contact with the outer peripheral surface of the body main body 52, a foamed rubber layer 102 laminated on the outer peripheral surface of the metal layer 150, and a solid rubber layer 104 laminated on the outer peripheral surface of the foamed rubber layer 102. The foamed rubber layer 102 is adhered to the metal layer 150 with an adhesive 101.

[0071] For the metal layer 150, metal materials such as stainless steel, aluminum, and copper are used, for example. In this embodiment, the metal layer 150 is formed of stainless steel. Also, the thickness of the metal layer 150 in this embodiment is, for example, 0.1 mm.

[0072] The foamed rubber layer 102 is a layer formed of foamed rubber (i.e., sponge rubber). For the foamed rubber layer 102, resin materials such as nitrile rubber, chloroprene rubber, ethylene propylene diene rubber, acrylonitrile butadiene rubber, styrene butadiene rubber, silicone rubber, fluorine rubber, polyurethane, polyethylene, and mixtures thereof are used, for example.

[0073] The solid rubber layer 104 is a layer formed of solid rubber (i.e., hard rubber) and is harder than the foamed rubber layer 102. For the solid rubber layer 104, resin materials such as nitrile rubber, chloroprene rubber, ethylene propylene diene rubber, acrylonitrile butadiene rubber, silicone rubber, and mixtures thereof are used, for example. As an example, the inner peripheral surface of the solid rubber layer 104 is joined to the outer peripheral surface of the foamed rubber layer 102 by heating and melting.

[0074] The solid rubber layer 104 is joined to the outer peripheral surface of the foamed rubber layer 102. Note that the total thickness of the two layers of the solid rubber layer 104 and the foamed rubber layer 102 in this embodiment is thicker than the metal layer 150 and is, for example, 7.0 mm.

[0075] As shown in FIGS. 6, 10, 11, etc., the attachment portion 110 is in the shape of a plate that is long in the axial direction and has a thickness in the radial direction. Metal members such as stainless steel and aluminum are used for the attachment portion 110. The attachment portion 110 has a pair of protruding portions 112 that protrude from both sides of the sheet member 100 in the axial direction, and a central portion 113 that is disposed between the pair of protruding portions 112. The central portion 113 is disposed within the range of the sheet member 100 when viewed in the thickness direction of the sheet member 100, in other words, when viewed in the radial direction. In other words, when viewed in the thickness direction of the sheet member 100, the entire central portion 113 overlaps with the sheet member 100.

[0076] As shown in FIG. 10, the attachment portion 110 includes a first surface 110A that is adhered to one end portion 100A of the back surface 151 of the sheet member 100. The attachment portion 110 includes a second surface 110B that intersects the first surface 110A and faces the downstream side in the rotational direction of the sheet member 100, and a third surface 110C that is located on the side opposite to the first surface 110A. The second surface 110B is the end surface on the downstream side in the rotational direction of the attachment portion 110. The second surface 110B and the third surface 110C are examples of surfaces having a direction different from that of the first surface 110A.

[0077] Also, at a portion of the attachment portion 110 on the side opposite to the second surface 110B (the upstream side in the rotational direction), a protruding portion 114 having a triangular shape when viewed in the axial direction and protruding in the direction opposite to the second surface 110B is formed (see also FIG. 9). The protruding portion 114 is formed with an inclined surface 114A that is inclined so that the circumferential width decreases toward the sheet member 100 side.

[0078] The first surface 110A is adhered to one end portion 100A (the back surface 151 on the downstream side in the rotational direction) of the back surface 151 of the sheet member 100 with an adhesive 116. In the present embodiment, the first surface 110A is adhered to the metal layer 150 that constitutes the back surface 151 of the sheet member 100 with the adhesive 116. As an example, the first surface 110A of the central portion 113 of the attachment portion 110 is adhered to one end portion 100A of the back surface 151 of the sheet member 100.

[0079] The sheet member 100 includes a recessed portion 105 where a part of the sheet member 100 extends around to the side of the second surface 110B in the mounting portion 110. The recessed portion 105 is adhered to the second surface 110B of the mounting portion 110 with an adhesive 117. The recessed portion 105 is formed of a solid rubber layer 104 which is one of a plurality of layers. That is, in the present embodiment, the recessed portion 105 formed of the solid rubber layer 104 harder than the foamed rubber layer 102 is adhered to the second surface 110B. As the adhesives 117 and 116, different types of adhesive materials may be used according to the material of the sheet member 100 to be adhered, or the same type of adhesive material may be used.

[0080] In the present embodiment, the foamed rubber layer 102 includes an inclined surface 102A whose thickness gradually decreases toward the inside in the radial direction at the end portion on the downstream side in the rotation direction of the sheet member 100, and an end surface 102B adjacent to the inclined surface 102A. The solid rubber layer 104 constitutes a recessed portion 105 that covers the inclined surface 102A and the end surface 102B of the foamed rubber layer 102 and extends to the side of the end surface of the metal layer 150 and the second surface 110B of the mounting portion 110.

[0081] Through holes 112A through which mounting screws 60 (see FIGS. 5, 8, 9, and 12) are passed are formed in the pair of protruding portions 112. The through hole 112A in the present embodiment has a U-shaped configuration with the other side in the circumferential direction being open.

[0082] As shown in FIGS. 6, 8, and 11, at the other end portion 100B of the sheet member 100, an end portion 152 of the metal layer 150 that extends more in the circumferential direction than the foamed rubber layer 102 and the solid rubber layer 104 is formed. A plurality of U-shaped fixing grooves 154 and a plurality of positioning holes 210B are formed in the end portion 152 of the metal layer 150 at intervals in the axial direction.

[0083] As shown in FIGS. 5 and 7 to 9, an attachment member 120 is provided at the other end portion 100B of the sheet member 100. The attachment member 120 has an axially long plate-shaped fixing plate 124 and a substantially quadrangular prism-shaped fixed portion 122. The end portion 152 of the metal layer 150 at the other end portion 100B of the sheet member 100 is sandwiched between the fixing plate 124 and the fixed portion 122, and the two are fastened by a fixing screw 64 (see FIG. 5) passed through a fixing groove 154, thereby being fixed to the attachment member 120.

[0084] Furthermore, the end portion 152 of the metal layer 150 is positioned on the attachment member 120 by passing a positioning pin 213 through the positioning holes of the fixing plate 124 and the fixed portion 122 formed at the same position as the positioning hole 210B.

[0085] As shown in FIGS. 5 and 9, on one side in the circumferential direction (the upstream side in the rotational direction with respect to the recess 54) in the recess 54 of the body main body 52, a base portion 300 to which the attachment portion 110 of one end portion 100A of the sheet member 100 is attached is provided (see also FIGS. 8 and 12). The base portion 300 is an example of a portion to be attached. The base portion 300 has a main body portion 310 and a wall portion 320 joined to one side of the main body portion 310 (see also FIG. 12). As shown in FIG. 8, the main body portion 310 protrudes axially outward from the wall portion 320. As shown in FIG. 9, the wall portion 320 extends radially outward from a contact surface 310A of the main body portion 310 to be described later. The base portion 300 is made of metal or resin. The sheet member 100 is a thin plate-like body and includes a foamed rubber layer 102 and a solid rubber layer 104, and thus is more easily elastically deformed than the base portion 300.

[0086] As shown in FIGS. 9 and 12, the main body portion 310 constituting the base portion 300 has a contact surface 310A that contacts the third surface 110C of the attachment portion 110. The wall portion 320 has a contact surface 320A against which the inclined surface 114A of the protruding portion 114 of the attachment portion 110 abuts. The contact surface 320A is inclined toward the other side (the side that retreats with respect to the recess 54) in the radial direction. In other words, on one side in the circumferential direction of the base portion 300, a triangular recess 302 is formed when viewed from the axial direction (see FIG. 12).

[0087] With the mounting portion 110 disposed on the radially outer side of the base portion 300, the mounting portion 110 is attached to the base portion 300. As shown in FIG. 8, both axial ends of the main body portion 310 of the base portion 300 provided in the recess 54 of the barrel main body 52 are screwed with mounting screws 60 passed through through holes 115 formed in the overhanging portions 112 of the mounting portion 110, whereby one end portion 100A of the seat member 100 is attached to the base portion 300 (see also FIG. 5). The mounting screw 60 is an example of a fixture. Thereby, one end portion 100A side of the mounting member 90 is attached to the barrel main body 52. As shown in FIG. 12, the overhanging portions 112 at both axial ends of the mounting portion 110 of the mounting member 90 are attached to the base portion 300 by fixing the mounting screws 60 from the radial direction (arrow E direction) of the base portion 300.

[0088] At this time, as shown in FIG. 9, the third surface 110C of the mounting portion 110 is in contact with the contact surface 310A of the base portion 300. Further, the protruding portion 114 of the mounting portion 110 is inserted into the recess 302 and abutted in the circumferential direction, and the inclined surface 114A abuts against the abutting surface 320A.

[0089] The mounting portion 110 can be removed from the base portion 300 by removing the mounting screw 60.

[0090] As shown in FIGS. 5, 7 to 9, on the other side in the circumferential direction (downstream side in the rotational direction with respect to the recess 54) in the recess 54 of the barrel main body 52, a base portion 350 to which a mounting member 120 of the other end portion 100B of the seat member 100 is attached is provided.

[0091] In the present embodiment, the base portion 350 is joined to a support portion 360 (see FIG. 5) provided in the recess 54. The base portion 350 is L-shaped when viewed from the axial direction, and the base portion 350 is provided with guide pins 352 protruding radially outward. As shown in FIG. 5, the guide pins 352 are provided on both axial sides respectively.

[0092] Then, the guide pin 352 of the base 350 provided in the recess 54 of the body main body 52 is passed through the guide hole 220C (see FIG. 7) of the attachment member 120, whereby the attachment member 120 is positioned in the circumferential direction and the axial direction.

[0093] As shown in FIG. 1, the transfer cylinder 50 is configured such that the opening edge portion on the upstream side in the rotation direction in the recess 54 of the body main body 52 contacts the counter roll 24 via the transfer belt 30 by rotation. In the present embodiment, a base 300 is provided at the edge portion on the upstream side in the rotation direction with respect to the recess 54 on the outer peripheral surface of the body main body 52. Then, with the attachment portion 110 disposed on the base 300, the attachment portion 110 is attached to the base 300.

[0094] (Actions and effects according to the present embodiment) Next, the actions and effects of the present embodiment will be described.

[0095] The mounting member 90 includes a sheet member 100 and an attachment portion 110 attached to one end portion 100A on the downstream side in the rotation direction of the sheet member 100. The first surface 110A of the attachment portion 110 is adhered to one end portion 100A of the back surface 151 of the sheet member 100, and the second surface 110B of the attachment portion 110, which has a different orientation from the first surface 110A, is adhered to the wrapping portion 105 of the sheet member 100.

[0096] The sheet member 100 of the mounting member 90 is wound around the outer peripheral surface of the body main body 52 excluding the recess 54. The transfer cylinder 50 including the body main body 52 and the mounting member 90 rotates in the direction of arrow B. Since the body main body 52 includes the recess 54, the sheet member 100 of the mounting member 90 cannot be endless, and one end portion 100A on the downstream side in the rotation direction of the sheet member 100 exists. Therefore, when one end portion 110A on the downstream side in the rotation direction of the sheet member 100 reaches the secondary transfer position T2 (see FIG. 1), one end portion 100A on the downstream side in the rotation direction of the sheet member 100 at the opening edge of the recess 54 collides with the counter roll 24 via the transfer belt 30. For this reason, distortion is likely to occur in the circumferential direction in the vicinity of one end portion 100A on the downstream side in the rotation direction of the sheet member 100.

[0097] Here, with reference to FIG. 17, the mounting member 500 of the first comparative example will be described. As shown in FIG. 17, the mounting member 500 includes a sheet member 502 and a mounting portion 110. The sheet member 502 includes a metal layer 150, a foamed rubber layer 102 adhered to the metal layer 150 with an adhesive 101, and a solid rubber layer 104 laminated on the foamed rubber layer 102. The solid rubber layer 104 is laminated on the inclined surface 102A of the foamed rubber layer 102, but the end surface 102B on the downstream side in the rotation direction of the foamed rubber layer 102 is not covered by the solid rubber layer 104.

[0098] In the mounting member 500, only the first surface 110A of the mounting portion 110 is adhered to the back surface 151 (i.e., the back surface of the metal layer 150) of the sheet member 502 with an adhesive 116. Then, with the third surface 110C of the mounting portion 110 in contact with the contact surface 310A of the base portion 300, the mounting portion 110 is fixed to the base portion 300 with a mounting screw (not shown).

[0099] In the mounting member 500 as described above, when the downstream portion in the rotation direction of the sheet member 502 collides with the opposing roll 24 via the transfer belt 30, the back surface 151 of the sheet member 100 is likely to be peeled off from the first surface 110A of the mounting portion 110 due to the load acting on the sheet member 502 (see FIG. 17).

[0100] On the other hand, in the mounting member 90 of the present embodiment, as described above, the second surface 110B of the mounting portion 110 having a different orientation from the first surface 110A is adhered to the recessed portion 105 of the sheet member 100. For this reason, in the mounting member 90, the sheet member 100 is less likely to be peeled off from the mounting portion 110 compared to the case where only the first surface 110A of the mounting portion 110 is adhered to the sheet member 502 (i.e., where only the mounting portion 110 is adhered to the back surface 151 of the sheet member 502).

[0101] Further, the mounting member 90 includes an indented portion 105 where a part of the sheet member 100 wraps around to the side of the second surface 110B that intersects the first surface 110A at the attachment portion 110. The second surface 110B faces the downstream side in the rotational direction of the sheet member 100, and the indented portion 105 is adhered to the second surface 110B. Therefore, in the mounting member 90, the sheet member 100 is less likely to peel off from the attachment portion 110 compared to when the indented portion is adhered to a surface other than the second surface 110B facing the advancing direction of the attachment portion 110.

[0102] Also, in the mounting member 90, the sheet member 100 is more likely to elastically deform than the base portion 300. Therefore, in the mounting member 90, the performance of the mounting member 90 is stabilized compared to the case where the sheet member is composed only of a member harder than the base portion 300. Examples of the performance of the mounting member 90 include the performance of improving image quality in a configuration where a toner image is transferred from the transfer belt 30 to the recording medium P between the transfer drum 50 and the transfer belt 30.

[0103] Also, in the mounting member 90, the sheet member 100 has a plurality of layers. In the present embodiment, the sheet member 100 has a metal layer 150, a foamed rubber layer 102, and a solid rubber layer 104. Therefore, in the mounting member 90, functions can be easily added compared to the case where the sheet member is single-layered. Examples of this performance include the performance of improving the peeling posture of the recording medium P by the solid rubber layer 104, and the performance of improving the toner cleaning property by the solid rubber layer 104.

[0104] Also, in the mounting member 90, the solid rubber layer 104, which is one of the plurality of layers of the sheet member 100, is adhered to the second surface 110B, which has a different orientation from the first surface 110A of the attachment portion 110. Therefore, in the mounting member 90, manufacturing becomes easier compared to the case where two or more layers of the sheet member are adhered to a surface having a different orientation from the first surface 110A of the attachment portion 110.

[0105] Further, in the mounting member 90, the seat member 100 includes a foamed rubber layer 102, and a wrapping portion 105 formed of a solid rubber layer 104 harder than the foamed rubber layer 102 is adhered to a second surface 110B of the mounting portion 110, which faces a different direction from the first surface 110A. Therefore, in the mounting member 90, peeling of the seat member 100 from the mounting portion 110 is suppressed as compared with the case where the foamed rubber layer is adhered to a surface facing a different direction from the first surface 110A of the mounting portion 110.

[0106] Further, in the mounting member 90, the mounting portion 110 is a plate-shaped metal member. Therefore, in the mounting member 90, manufacturing is easier as compared with the case where the mounting portion is a block-shaped member.

[0107] Further, the transfer cylinder 50 of the present embodiment includes a cylinder main body 52 having a recess 54 along the axial direction, and a mounting member 90 wound around the outer peripheral surface of the cylinder main body 52 excluding the recess 54. The cylinder main body 52 rotates in the circumferential direction, and the opening edge portion on the upstream side in the rotation direction in the recess 54 contacts the counter roll 24 via the transfer belt 30 due to the rotation. A base portion 300 is provided in a portion on the upstream side in the rotation direction with respect to the recess 54 of the cylinder main body 52, and the mounting portion 110 is attached to the base portion 300 in a state where the mounting portion 110 is disposed on the base portion 300.

[0108] When the vicinity of the mounting portion 110 on the downstream side in the rotation direction of the seat member 100 contacts the counter roll 24 via the transfer belt 30 due to the rotation of the transfer cylinder 50, a load is applied to the downstream side in the rotation direction of the seat member 100. Even in such a case, in the transfer cylinder 50, the seat member 100 is less likely to be peeled off from the mounting portion 110 as compared with the case where only the first surface 110A of the mounting portion 110 is adhered to the seat member 502.

[0109] In the transfer cylinder 50, the overhanging portions 112 at both axial ends of the mounting portion 110 in the mounting member 90 are attached to the base portion 300 by fixing the mounting screws 60 from the radial direction of the base portion 300.

[0110] Here, the transfer cylinder 510 of the second comparative example will be described with reference to FIG. 18. As shown in FIG. 18, the transfer cylinder 510 includes a cylinder main body 512 having a recess 516, and a mounting member 514 mounted on the outer peripheral surface of the cylinder main body 512. The cylinder main body 512 includes a base portion 520 fixed to the upstream side in the rotational direction within the recess 516. A screw hole 522 is provided in a side surface 520A of the base portion 520 within the recess 516. The screw hole 522 opens into the recess 516.

[0111] The mounting member 514 includes a sheet member 514A, and a mounting portion 514B bent radially inward from one end side in the circumferential direction (downstream side in the rotational direction) of the sheet member 514A. The mounting portion 514B and the sheet member 514A are integrally formed. With the mounting portion 514B in contact with the side surface 520A of the base portion 520, a mounting screw 524 is inserted through a through hole 515 of the mounting portion 514B and fastened to the screw hole 522 of the base portion 520. Thereby, the mounting portion 514B of the mounting member 514 is fixed to the base portion 520.

[0112] In such a mounting member 514, when fastening the mounting screw 524 to the screw hole 522 of the base portion 520, it is necessary for the operator's hand to access from the side within the recess 516 as indicated by the arrow F. For this reason, when fixing the mounting member 514 to the base portion 520, the fastening operation of the mounting screw 524 is difficult.

[0113] On the other hand, in the transfer cylinder 50 of the present embodiment, as shown in FIG. 12, the overhanging portions 112 at both axial ends of the mounting portion 110 of the mounting member 90 are attached to the base portion 300 by fixing the mounting screws 60 from the radial direction (arrow E direction) of the base portion 300. For this reason, in the transfer cylinder 50, compared with the case where the mounting portion 514B is attached to the base portion 520 from the side of the side surface of the recess 516, when the mounting portion 110 is fixed to the base portion 300 with the mounting screws 60, it is easier for the operator's hand to access, and the fastening operation of the mounting screws 60 becomes easier.

[0114] The image forming apparatus 10 of the present embodiment includes a transfer cylinder 50 that conveys a recording medium P, and an opposing roll 24 that contacts the transfer cylinder 50 via a transfer belt 30. At a secondary transfer position T2 between the opposing roll 24 and the transfer cylinder 50, a toner image formed on the transfer belt 30 is transferred to the recording medium P conveyed by the transfer cylinder 50. Therefore, in the image forming apparatus 10, when only the first surface 110A of the attachment portion 110 is adhered to the sheet member 502, when the vicinity of the attachment portion 110 of the sheet member 100 hits the opposing roll 24 via the transfer belt 30 due to the rotation of the transfer cylinder 50, the sheet member 100 is less likely to be peeled off from the attachment portion 110.

[0115] Next, the results of evaluating the peeling between the sheet member 100 and the attachment portion 110 of the mounting member 90 of the present embodiment will be described.

[0116] The evaluation item is the peeling between the sheet member 100 and the attachment portion 110 according to the number of printed sheets. When the sheet member 100 and the attachment portion 110 are peeled off, image formation defects occur due to the lifting of the peeled portion. In the experiment, the recording medium P was printed by the image forming apparatus 10 using the transfer cylinder 50 equipped with the mounting member 90 of the present embodiment and the transfer cylinder equipped with the mounting member 500 of the first comparative example. The number of printed sheets was evaluated at 1000 sheets (hereinafter referred to as 1KPV), 100 × 1000 sheets (hereinafter referred to as 100KPV), and 5000 × 1000 sheets (hereinafter referred to as 5000KPV).

[0117] As a result, in the mounting member 500 of the first comparative example, when the number of printed sheets was 1KPV, peeling between the sheet member 502 and the attachment portion 110 did not occur, but when the number of printed sheets was 100KPV, peeling occurred in a part of the sheet member 502 and the attachment portion 110. Further, in the mounting member 500, when the number of printed sheets was 5000KPV, peeling occurred in a wide area of the sheet member 502 and the attachment portion 110.

[0118] On the other hand, in the mounting member 90 of the present embodiment, peeling between the sheet member 100 and the attachment portion 110 did not occur in all cases of 1KPV, 100KPV, and 5000KPV of the number of printed sheets.

[0119] [Second Embodiment] Next, the mounting member 400 of the second embodiment will be described with reference to FIG. 13. For the same components as those in the first embodiment described above, the same reference numerals will be given and their description will be omitted.

[0120] As shown in FIG. 13, the mounting member 400 includes a sheet member 402 and a mounting portion 110. The sheet member 402 includes a metal layer 150, a foamed rubber layer 102, and a solid rubber layer 104.

[0121] In the second embodiment, the shapes of the foamed rubber layer 102 and the solid rubber layer 104 are different from those of the sheet member 100 in the first embodiment. One end side in the circumferential direction (that is, the downstream side in the rotation direction) of the foamed rubber layer 102 is rectangular. And the solid rubber layer 104 covers the end face 102C of the foamed rubber layer 102, and further a recessed portion 105 is formed in which the solid rubber layer 104 extends to the second surface 110B side of the mounting portion 110. Other configurations of the mounting member 400 are the same as those of the mounting member 90 in the first embodiment.

[0122] In the above mounting member 400, with the same configuration as that of the mounting member 90 in the first embodiment, the same operations and effects as those of the mounting member 90 can be obtained.

[0123] [Third Embodiment] Next, the mounting member 410 of the third embodiment will be described with reference to FIG. 14. For the same components as those in the first and second embodiments described above, the same reference numerals will be given and their description will be omitted.

[0124] As shown in FIG. 14, the mounting member 410 includes a seat member 412 and a mounting portion 110. The seat member 412 includes a solid rubber layer 414. That is, the seat member 412 is composed of a single layer. An inclined surface 414A is formed at one end side in the circumferential direction (i.e., the downstream side in the rotation direction) of the solid rubber layer 414, and the thickness of the solid rubber layer 414 gradually decreases toward the one end side. The inclined surface 414A is formed on the side opposite to the mounting portion 110 in the solid rubber layer 414. For example, the seat member 412 forms the inclined surface 414A by cutting the corner portion on the side opposite to the mounting portion 110 of the solid rubber layer 414.

[0125] The first surface 110A of the mounting portion 110 is adhered to the back surface 413 of the seat member 412 (i.e., the back surface 413 of the solid rubber layer 414) with an adhesive 116. The seat member 412 includes an overhanging portion 415 where the solid rubber layer 414 overhangs to the side of the second surface 110B of the mounting portion 110. The overhanging portion 415 is adhered to the second surface 110B of the mounting portion 110 with an adhesive 117. Other configurations of the mounting member 410 are the same as those of the mounting member 90 in the first embodiment.

[0126] In the above-described mounting member 410, with the same configuration as that of the mounting member 90 in the first embodiment, the same operations and effects as those of the mounting member 90 can be obtained.

[0127] [Fourth Embodiment] Next, with reference to FIG. 15, the mounting member 420 of the fourth embodiment will be described. Note that the same components as those in the first to third embodiments described above are denoted by the same reference numerals and their descriptions are omitted.

[0128] As shown in FIG. 15, the mounting member 420 includes a seat member 422 and a mounting portion 110. The seat member 422 includes a solid rubber layer 414. That is, the seat member 422 is composed of a single layer. In the fourth embodiment, the shape of the solid rubber layer 414 is different from that of the seat member 412 in the third embodiment. One end side in the circumferential direction (i.e., the downstream side in the rotation direction) of the solid rubber layer 414 is rectangular. The end face 414B of one end side in the circumferential direction (i.e., the downstream side in the rotation direction) of the solid rubber layer 414 is arranged in a direction along the second face 110B of the mounting portion 110.

[0129] The first face 110A of the mounting portion 110 is adhered to the back face 413 of the seat member 422 (i.e., the back face 413 of the solid rubber layer 414) with an adhesive 116. The seat member 422 includes a recessed portion 415 that wraps around to the side of the second face 110B of the mounting portion 110 along the end face 414B of the solid rubber layer 414. The recessed portion 415 is adhered to the second face 110B of the mounting portion 110 with an adhesive 117. Other configurations of the mounting member 420 are the same as those of the mounting member 90 in the first embodiment.

[0130] In the above-described mounting member 420, with the same configuration as the mounting member 90 in the first embodiment, the same operations and effects as those of the mounting member 90 can be obtained.

[0131] [Fifth Embodiment] Next, with reference to FIG. 16, the mounting member 430 of the fifth embodiment will be described. Note that the same reference numerals are given to the same components as those in the first to fourth embodiments described above, and the description thereof will be omitted.

[0132] As shown in FIG. 16, the mounting member 430 includes a seat member 432 and a mounting portion 110. The seat member 432 includes a metal layer 150, a foamed rubber layer 102, and a solid rubber layer 104.

[0133] The sheet member 432 includes a recessed portion 435 where a part of the sheet member 432 extends from the second surface 110B of the attachment portion 110 to the third surface 110C on the side opposite to the first surface 110A. In the fifth embodiment, the recessed portion 435 is formed of a solid rubber layer 104 which is a part of the sheet member 432. The recessed portion 435 includes a first portion 435A that contacts the second surface 110B of the attachment portion 110, and a second portion 435B that is bent from an end of the first portion 435A and contacts the third surface 110C of the attachment portion 110. The recessed portion 435 is adhered to the second surface 110B and the third surface 110C of the attachment portion 110 with an adhesive 117.

[0134] A base portion 450, which is an example of a mounted portion provided on the body main body 52, is provided with a contact portion 450A that contacts the third surface 110C of the attachment portion 110. Further, the base portion 450 is provided with a notch portion 450B that is recessed by the thickness of the recessed portion 435 of the sheet member 432 and the adhesive 117 at a position adjacent to the contact portion 450A. The third surface 110C of the attachment portion 110 of the mounting member 430 contacts the contact portion 450A of the base portion 450, and the attachment portion 110 is fixed to the base portion 450 with mounting screws (not shown) in a state where the recessed portion 435 contacts the notch portion 450B. Note that the other configurations of the mounting member 430 and the transfer cylinder 50 are the same as those of the mounting member 90 and the transfer cylinder 50 in the first embodiment.

[0135] In the above-described mounting member 430, with the same configuration as that of the mounting member 90 in the first embodiment, the same operations and effects as those of the mounting member 90 can be obtained. Further, with a configuration different from that of the mounting member 90 in the first embodiment, the following operations and effects can be obtained.

[0136] In the above-described mounting member 430, the recessed portion 435 extends from the second surface 110B of the attachment portion 110 to the third surface 110C on the side opposite to the first surface 110A, and the third surface 110C is adhered to the recessed portion 435. Therefore, in the mounting member 430, the sheet member 432 is less likely to be peeled off from the attachment portion 110 as compared with the case where only the third surface 110C on the side opposite to the first surface 110A of the attachment portion 110 is adhered to the recessed portion of the sheet member.

[0137] Furthermore, the base portion 450 of the body main body 52 is provided with a cutout portion 450B that is recessed by the amount of the wrapping portion 435 of the sheet member 432 and the thickness of the adhesive 117. Therefore, in the transfer cylinder 50, the lifting of the wrapping portion 435 of the sheet member 432 from the base portion 450 is suppressed as compared with the case where the contact surface of the base portion is a flat surface with a uniform height.

[0138] (Others) Note that the present invention is not limited to the above-described embodiments, and design changes can be made as appropriate without departing from the gist of the present invention.

[0139] In the first to fifth embodiments, the sheet member was adhered to the entire axial surface of the attachment portion 110. However, in the present disclosure, the sheet member may be adhered to a part of the axial direction of the attachment portion 110 (for example, a plurality of locations in the axial direction of the attachment portion 110). Further, the sheet member was provided with a wrapping portion extended to the second surface 11B side of the attachment portion 110. However, the present disclosure is not limited to this configuration. For example, a concave portion recessed radially outward may be provided at one end portion 110A of the back surface 151 of the sheet member 100, the attachment portion 110 may be inserted into the concave portion, and the second surface 110B of the attachment portion 110 may be adhered to the downstream portion (wrapping portion) in the rotational direction of the concave portion.

[0140] In the first, second, and fifth embodiments, the foamed rubber layer 102 and the solid rubber layer 104 were laminated on the outer peripheral surface of the metal layer 150. However, the present disclosure is not limited to this configuration. The coating layer covering the metal layer 150 can be changed. For example, only the solid rubber layer may be laminated on the metal layer 150 as the coating layer, and the wrapping portion may be formed by the solid rubber layer.

[0141] In the third and fourth embodiments, the sheet member was composed of a single layer made of the solid rubber layer 104. However, the present disclosure is not limited to this configuration. For example, the sheet member may be composed of a single layer of foamed rubber, or a configuration in which only the foamed rubber layer is laminated on the metal layer. Further, for example, the sheet member may have a configuration in which only the solid rubber layer is laminated on the metal layer.

[0142] In the fifth embodiment, the wrapping portion 435 of the sheet member 432 was adhered to the second surface 110B and the third surface 110C of the mounting portion 110. However, the present disclosure is not limited to this configuration. For example, the wrapping portion of the sheet member may be adhered to the third surface 110C without being adhered to the second surface 110B of the mounting portion 110.

[0143] Further, the body main body 52 may be formed in a substantially cylindrical shape instead of a substantially cylindrical shape. Further, the body member is not limited to the configuration applied to the transfer cylinder 50, and may be applied to, for example, a fixing cylinder for pressure-fixing toner, a blanket cylinder used in offset printing, and the like. Further, in the present embodiment, a toner image is given as an example of an image, and the toner image is formed by a dry electrophotographic method, but the present invention is not limited to this. For example, a toner image formed by a wet electrophotographic method may be used.

Explanation of reference numerals

[0144] 10 Image forming apparatus 24 Opposing roll (an example of a transfer member, an example of another member) 30 Transfer belt (an example of an intermediate transfer body, an example of another member) 50 Transfer cylinder (an example of a body member) 52 Body main body 54 Concave portion (an example of a recessed portion) 60 Mounting screw (an example of a fixing tool) 90 Mounting member 100 Sheet member 100A One end portion 102 Foamed rubber layer (an example of a plurality of layers) 104 Solid rubber layer (an example of a plurality of layers, an example of a single layer) 105 Wrapping portion 110 Mounting portion 110A First surface 110B Second surface (an example of a surface having a different orientation from the first surface) 110C Third surface (an example of a surface having a different orientation from the first surface) 150 Metal layer (an example of a plurality of layers) 151 Back surface 300 units (an example of the mounted part) 400 mounting member 402 seat member 410 mounting member 412 seat member 413 back surface 414 solid rubber layer 415 tucking-in part 420 mounting member 422 seat member 430 mounting member 432 seat member 435 tucking-in part 450 base part (an example of the mounted part) P recording medium

Claims

1. A mounting member to be mounted on a member moving in a traveling direction, comprising: a rectangular sheet member; a mounting portion having a first surface adhered to one end of the back surface of the downstream portion of the sheet member in the traveling direction and removably attached to a portion to be attached, wherein a surface having a different orientation from the first surface is adhered to the sheet member; The mounting member having the above.

2. The mounting member according to claim 1, further comprising a recessed portion in which a part of the sheet member intersects the first surface of the mounting portion and wraps around to the side of a second surface facing the downstream side in the traveling direction of the sheet member, wherein the recessed portion is adhered to the second surface.

3. The mounting member according to claim 2, wherein the recessed portion wraps around from the second surface of the mounting portion to the side of a third surface opposite to the first surface, and the third surface is adhered to the recessed portion.

4. The mounting member according to any one of claims 1 to 3, wherein the sheet member is more easily elastically deformed than the portion to be attached.

5. The mounting member according to claim 4, wherein the sheet member has a plurality of layers.

6. The mounting member according to claim 5, wherein one of the plurality of layers is adhered to a surface having a different orientation from the first surface of the mounting portion.

7. The mounting member according to claim 6, wherein the sheet member includes a foamed rubber layer, and one layer harder than the foamed rubber layer is adhered to a surface having a different orientation from the first surface of the mounting portion.

8. The mounting member according to any one of claims 1 to 7, wherein the mounting portion is a plate-shaped metal member.

9. A substantially circular cross-sectioned body main body having a recessed portion along the axial direction, configured to rotate in the circumferential direction and the opening edge portion on the upstream side in the rotation direction in the recessed portion hits another member by the rotation; The mounting member according to any one of claims 1 to 8, wound around the outer peripheral surface of the body main body excluding the recessed portion, wherein the portion to be attached is provided at a portion on the upstream side in the rotation direction with respect to the recessed portion of the outer peripheral surface of the body main body, A body member in which the mounting portion is attached to the portion to be attached in a state where the mounting portion is disposed on the radially outer side of the portion to be attached.

10. The body member according to claim 9, wherein both ends of the mounting portion in the axial direction of the body main body are attached to the portion to be attached by fixing a fixing tool from the radial direction of the portion to be attached.

11. The body member according to claim 9 or claim 10 for transporting a recording medium, A transfer member that contacts the cylindrical member via an intermediate transfer body and transfers an image formed on the intermediate transfer body to the recording medium conveyed by the cylindrical member; An image forming apparatus having the same.

Images