JP7003520B2 - Rotating member and image forming device - Google Patents

Description

The present invention relates to a rotating member and an image forming apparatus.

The following Patent Documents 1 and 2 are conventionally known regarding rotating members such as rollers and drums in conventional image forming devices such as copiers and printers.
Japanese Patent Application Laid-Open No. 2008-310254 as Patent Document 1 describes a fitting pin inserted into a hole of a drive shaft (101) in a configuration in which an encoder (110) and a drive gear (106) are fixed to a drive shaft (101). A technique for fixing rotation by fitting (107) into a fitting hole (106a) of a drive gear (106), and fixing an encoder (110) to a drive shaft (101) with a cylindrical support member (114). Is described. Patent Document 1 provides a protruding portion (111d) protruding from the axial end of the holding member (111) of the encoder (110) and engages with the fitting hole (106b) of the drive gear (106). The configuration is also described.

Japanese Patent Application Laid-Open No. 2007-097240 as Patent Document 2 describes a one-side protruding end portion of a rotating shaft (2) in a configuration in which a rotating disk (4) of an encoder is mounted on a shaft end portion of a rotating shaft (2) of a motor. By forming a radial slit (12) in (2a) and screwing a set screw (13) that gradually becomes thicker toward the root, the slit (12) is widened in the radial direction to form a tubular body (6). A technique is described in which the rotary disk (4) is prevented from coming off to the outside in the axial direction by pushing the shaft end side of the shaft end side from the inside.

Japanese Unexamined Patent Publication No. 2008-310254 ("0025"-"0027", "0040"-"0043", FIGS. 1, 3, and 4). JP-A-2007-097240 ("0012", "0014", FIGS. 2, 3)

The present invention provides a rotating member that can be fixed to a rotating shaft by connecting a plurality of rotating members to each other, as compared with the case of using a dedicated member for fixing a member that rotates together with the rotating shaft. Is a technical issue.

In order to solve the technical problem, the rotating member of the invention according to claim 1 is
The axis of rotation and
A first functional member having a first penetrating portion through which the rotating shaft penetrates the inside and exerting a function with the rotation of the rotating shaft.
A second functional member having a second penetrating portion through which the rotating shaft penetrates the inside and exerting a function with the rotation of the rotating shaft, wherein the first one is in the axial direction of the rotating shaft. The first functional member is supported adjacent to the functional member and is connected to the first functional member movably supported with respect to the rotation axis before the second functional member is mounted. The second functional member for fixing the functional member to the rotating shaft, and
Equipped with
Each of the penetrating portions has a circular cross-sectional shape, and the outer peripheral surface of the first penetrating portion and the second penetrating portion has a tightening allowance with respect to the inner peripheral surface of one of the first penetrating portion and the first penetrating portion. When the functional member and the second functional member are tightly fitted, the position of the first functional member in the rotational direction with respect to the second functional member is fixed.
It is characterized by that.

In order to solve the technical problem, the rotating member of the invention according to claim 2 is
The axis of rotation and
A first functional member having a first penetrating portion through which the rotating shaft penetrates the inside and exerting a function with the rotation of the rotating shaft.
A second functional member having a second penetrating portion through which the rotating shaft penetrates the inside and exerting a function with the rotation of the rotating shaft, wherein the first one is in the axial direction of the rotating shaft. The first functional member is supported adjacent to the functional member and is connected to the first functional member movably supported with respect to the rotation axis before the second functional member is mounted. The second functional member for fixing the functional member to the rotating shaft, and
Equipped with
Each of the penetrating portions having a circular cross section has an elastic body supported between the inner peripheral surface of one of the first penetrating portion and the second penetrating portion and the outer peripheral surface of the other. When the first functional member and the second functional member are attached, they are elastically deformed to fix the position of the first functional member in the rotational direction with respect to the second functional member. It is a feature.

In order to solve the technical problem, the rotating member of the invention according to claim 3 is
The axis of rotation and
A first functional member having a first penetrating portion through which the rotating shaft penetrates the inside and exerting a function with the rotation of the rotating shaft.
A second functional member having a second penetrating portion through which the rotating shaft penetrates the inside and exerting a function with the rotation of the rotating shaft, wherein the first one is in the axial direction of the rotating shaft. The first functional member is supported adjacent to the functional member and is connected to the first functional member movably supported with respect to the rotation axis before the second functional member is mounted. The second functional member for fixing the functional member to the rotating shaft, and
A hooked portion formed on one of the first penetrating portion and the second penetrating portion,
A hooking portion formed on the other of the first penetrating portion and the second penetrating portion, and hooked on the hooked portion when the first functional member and the second functional member are mounted.
It is characterized by being equipped with.

In order to solve the technical problem, the rotating member of the invention according to claim 4 has a rotating member.
The axis of rotation and
A first functional member having a first penetrating portion through which the rotating shaft penetrates the inside and exerting a function with the rotation of the rotating shaft.
A second functional member having a second penetrating portion through which the rotating shaft penetrates the inside and exerting a function with the rotation of the rotating shaft, wherein the first one is in the axial direction of the rotating shaft. The first functional member is supported adjacent to the functional member and is connected to the first functional member movably supported with respect to the rotation axis before the second functional member is mounted. The second functional member for fixing the functional member to the rotating shaft, and
A positioned portion provided on either of the first functional member and the second functional member, which is provided in contact with the positioning portion provided on the rotating shaft and is positioned in the circumferential direction.
It is characterized by being equipped with.

In order to solve the technical problem, the rotating member of the invention according to claim 5 is
The axis of rotation and
A first functional member having a first penetrating portion through which the rotating shaft penetrates the inside and exerting a function with the rotation of the rotating shaft.
A second functional member having a second penetrating portion through which the rotating shaft penetrates the inside and exerting a function with the rotation of the rotating shaft, wherein the first one is in the axial direction of the rotating shaft. The first functional member is supported adjacent to the functional member and is connected to the first functional member movably supported with respect to the rotation axis before the second functional member is mounted. The second functional member for fixing the functional member to the rotating shaft, and
The first functional member composed of a rotation detection member that detects rotation, and
It is characterized by being equipped with.

In order to solve the technical problem, the rotating member of the invention according to claim 6 is
The axis of rotation and
A first functional member having a first penetrating portion through which the rotating shaft penetrates the inside and exerting a function with the rotation of the rotating shaft.
A second functional member having a second penetrating portion through which the rotating shaft penetrates the inside and exerting a function with the rotation of the rotating shaft, wherein the first one is in the axial direction of the rotating shaft. The first functional member is supported adjacent to the functional member and is connected to the first functional member movably supported with respect to the rotation axis before the second functional member is mounted. The second functional member for fixing the functional member to the rotating shaft, and
The second functional member composed of the drive transmission member for transmitting the drive, and the second functional member.
It is characterized by being equipped with.

The invention according to claim 7 is the rotating member according to claim 6 .
The drive transmission member, which is composed of an oblique tooth gear having teeth inclined with respect to the axial direction of the rotating shaft, and receives a force in a direction toward the first functional member during rotation from the meshed gear.
It is characterized by being equipped with.

In order to solve the technical problem, the image forming apparatus of the invention according to claim 8 is used.
Image holder and
An intermediate transfer body to which the image of the surface of the image holder is transferred, and
The rotating member according to any one of claims 1 to 7 for rotating the intermediate transfer member, and the rotating member.
A transfer member that transfers the image of the intermediate transfer body to a medium, and
A fixing device for fixing an image on the medium and a fixing device
It is characterized by being equipped with.

According to the inventions of claims 1 to 6 and 8, as compared with the case of using a dedicated member for fixing the member rotating together with the rotating shaft, a plurality of rotating members are connected to each other and fixed to the rotating shaft. It is possible to provide a rotating member that can be used.
Further, according to the first aspect of the present invention, a plurality of functional members can be connected to each other and fixed to a rotating shaft by a tight fit.
Further, according to the second aspect of the present invention, it is possible to apply a force for connecting a plurality of functional members and fixing them to a rotating shaft by the elastic force of the elastic body.

Further, according to the third aspect of the present invention, a plurality of functional members are connected by being caught by the hooked portion and the hooked portion, and are integrally rotated on the rotating shaft.
Further, according to the fourth aspect of the present invention, the positioning portion and the positioned portion can be positioned in the circumferential direction, and the rotation shaft and each functional member can be integrally rotated.
Further, according to the invention of claim 5 , the rotation of the rotating shaft can be detected by the rotation detecting member.
Further, according to the invention of claim 6 , the drive can be transmitted to the rotating shaft by the drive transmission member.
According to the invention of claim 7 , it is possible to reduce the disengagement of the functional members as compared with the case where the force in the direction toward the first functional member is not received from the gear.

FIG. 1 is an overall explanatory view of the image forming apparatus of the first embodiment. FIG. 2 is an enlarged explanatory view of the visible image forming apparatus of the first embodiment. FIG. 3 is a perspective view of the drive roll of the intermediate transfer belt of the first embodiment. 4A and 4B are explanatory views of a shaft end portion of the drive roll according to the first embodiment, FIG. 4A is a sectional view of a main part, FIG. 4B is a design explanatory view of a connecting portion, and FIG. 4C is an explanatory diagram of a force acting on a gear. Is. 5A and 5B are explanatory views of the rotating member of the second embodiment, FIG. 5A is an explanatory diagram corresponding to FIG. 4A of the first embodiment, and FIG. 5B is a design explanatory view corresponding to FIG. 4B of the first embodiment. 6A and 6B are explanatory views of the rotating member of the third embodiment, FIG. 6A is an explanatory diagram corresponding to FIG. 4A of the first embodiment, and FIG. 6B is a design explanatory view corresponding to FIG. 4B of the first embodiment. 7 is an explanatory diagram of the rotating member of the fourth embodiment, FIG. 7A is an explanatory diagram corresponding to FIG. 4A of the first embodiment, and FIG. 7B is a design explanatory diagram corresponding to FIG. 4B of the first embodiment. 8 is an explanatory diagram of the rotating member of the fifth embodiment, FIG. 8A is an explanatory diagram corresponding to FIG. 5A of the second embodiment, and FIG. 8B is a design explanatory diagram corresponding to FIG. 5B of the second embodiment. 9 is an explanatory view of the rotating member of the sixth embodiment, FIG. 9A is an explanatory view corresponding to FIG. 4A of the first embodiment, FIG. 9B is a design explanatory view corresponding to FIG. 4B of the first embodiment, and FIG. 9C. Is a perspective view of the gear.

Next, specific examples of embodiments of the present invention (hereinafter referred to as Examples) will be described with reference to the drawings, but the present invention is not limited to the following examples.
In order to facilitate the understanding of the following explanations, in the drawings, the front-back direction is the X-axis direction, the left-right direction is the Y-axis direction, and the up-down direction is the Z-axis direction. The directions indicated by Z and −Z or the indicated sides are referred to as anterior, posterior, right, left, upward, downward, or anterior, posterior, right, left, upper, and inferior, respectively.
In addition, in the figure, the one with "・" in "○" means the arrow from the back of the paper to the front, and the one with "×" in "○" is the front of the paper. It shall mean an arrow pointing from to the back.
In addition, in the explanation using the following drawings, the illustrations other than the members necessary for the explanation are omitted as appropriate for the sake of easy understanding.

FIG. 1 is an overall explanatory view of the image forming apparatus of the first embodiment.
FIG. 2 is an enlarged explanatory view of the visible image forming apparatus of the first embodiment.
In FIG. 1, the copying machine U as an example of an image forming apparatus is an operation unit UI, a scanner unit U1 as an example of an image reading device, a feeder unit U2 as an example of a medium supply device, and an image recording device. It has an image unit U3 and a medium processing device U4.

(Explanation of operation unit UI)
The operation unit UI has an input button UIa used for starting copying and setting the number of copies. Further, the operation unit UI has a display unit UIb that displays the contents input by the input button UIa and the status of the copying machine U.

(Explanation of feeder section U2)
In FIG. 1, the feeder unit U2 has a plurality of paper feed trays TR1, TR2, TR3, TR4 as an example of a medium storage container. Further, the feeder unit U2 has a medium supply path SH1 or the like that takes out the recording paper S as an example of the image recording medium accommodated in the paper feed trays TR1 to TR4 and conveys it to the image forming unit U3. is doing.

(Explanation of image forming unit U3 and medium processing device U4)
In FIG. 1, the image forming unit U3 has an image recording unit U3a that records an image based on a document image read by a scanner unit U1 on a recording sheet S conveyed from the feeder unit U2.
In FIGS. 1 and 2, the drive circuit D of the latent image forming apparatus of the image forming unit U3 is based on the image information input from the scanner unit U1 and a drive signal corresponding to the drive signal is set in advance for each color Y. It is output to the latent image forming apparatus ROSy, ROSm, ROSc, ROSk of K. Photoreceptor drums Py, Pm, Pc, and Pk as an example of an image holder are arranged below each latent image forming apparatus ROSy to ROSk.

The surfaces of the rotating photoconductor drums Py, Pm, Pc, and Pk are uniformly charged by the charging rolls CRy, CRm, CRc, and CRk, which are examples of the charging device, respectively. On the surface of the photoconductor drums Py to Pk whose surface is charged, a laser beam Ly, Lm, Lc, Lk as an example of the latent image writing light output by the latent image forming devices ROSy, ROSm, ROSc, ROSk is used. An electrotent image is formed. The electrostatic latent image on the surface of the photoconductor drums Py, Pm, Pc, and Pk is a toner image as an example of a visible image of yellow Y, magenta M, cyan C, and black K by the developing devices Gy, Gm, Gc, and Gk. Is developed into.
In the developing devices Gy to Gk, the developing agent consumed by the development is replenished from the toner cartridges Ky, Km, Kc, and Kk as an example of the developing agent storage container. The toner cartridges Ky, Km, Kc, and Kk are detachably attached to the developer replenishing device U3b.

The toner image on the surface of the photoconductor drum Py, Pm, Pc, Pk is formed on the intermediate transfer belt B as an example of the intermediate transfer body by the primary transfer rolls T1y, T1m, T1c, T1k as an example of the primary transfer device. The primary transfer regions Q3y, Q3m, Q3c, and Q3k are sequentially superimposed and transferred, and a color toner image as an example of a multicolor visible image is formed on the intermediate transfer belt B. The color toner image formed on the intermediate transfer belt B is transferred to the secondary transfer region Q4.
In the case of only K-color image information, only the K-color photoconductor drum Pk and the developing device Gk are used, and only the K-color toner image is formed.
The photoconductor drums Py, Pm, Pc, and Pk after the primary transfer are prepared by using the drum cleaners CLy, CLm, CLc, and CLk as an example of the image holder cleaner to remove residual developer, paper dust, and the like adhering to the surface. The residue is removed.

In the first embodiment, the photoconductor drum Pk, the charging roll CRk, and the drum cleaner CLk are integrated as a K-color photoconductor unit UK as an example of the image holder unit. Similarly, for the other colors Y, M, and C, the photoconductor units UY, UM, and UC are formed by the photoconductor drums Py, Pm, Pc, the charging rolls CRy, CRm, CRc, and the drum cleaners CLy, CLm, and CLc. It is configured.
Further, a K-color visible image forming device UK + Gk is configured by a K-color photoconductor unit UK and a developing device Gk having a developing roll R0k as an example of a developer holder. Similarly, the Y, M, and C color photoconductor units UY, UM, and UC and the developing devices Gy, Gm, and Gc having the developing rolls R0y, R0m, and R0c make the Y, M, and C colors visible, respectively. The image forming apparatus UY + Gy, UM + Gm, and UC + Gc are configured.

Below the photoconductor drums Py to Pk, a belt module BM as an example of the intermediate transfer device is arranged. The belt module BM includes the intermediate transfer belt B, a drive roll Rd as an example of a drive member of the intermediate transfer body, a tension roll Rt as an example of a tension applying member, a walking roll Rw as an example of a meandering prevention member, and a driven member. It has a plurality of idler rolls Rf as an example, a backup roll T2a as an example of an opposing member, and the primary transfer rolls T1y, T1m, T1c, and T1k. The intermediate transfer belt B is supported so as to be rotatable and movable in the direction of arrow Ya.

A secondary transfer unit Ut is arranged below the backup roll T2a. The secondary transfer unit Ut is an example of the final transfer member, and has a secondary transfer roll T2b as an example of the secondary transfer member. The secondary transfer region Q4 is formed by the region where the secondary transfer roll T2b comes into contact with the intermediate transfer belt B. Further, the backup roll T2a as an example of the facing member faces the secondary transfer roll T2b with the intermediate transfer belt B interposed therebetween. The backup roll T2a is in contact with the contact roll T2c as an example of the feeding member. A secondary transfer voltage having the same polarity as the charging polarity of the toner is applied to the contact roll T2c.
The backup roll T2a, the secondary transfer roll T2b, and the contact roll T2c constitute the secondary transfer device T2.

Below the belt module BM, a medium transport path SH2 is arranged. The recording paper S fed from the medium supply path SH1 of the feeder unit U2 is conveyed to the cash register roll Rr as an example of the transfer timing adjusting member by the transfer roll Ra as an example of the transfer member of the medium. Receipt Rr conveys the recording paper S to the downstream side at the time when the toner image formed on the intermediate transfer belt B is conveyed to the secondary transfer region Q4. The recording paper S sent out by the cash register roll Rr is guided by the paper guide SGr on the cash register side and the paper guide SG1 before transfer, and is conveyed to the secondary transfer area Q4.
The toner image on the intermediate transfer belt B is transferred to the recording paper S by the secondary transfer device T2 when passing through the secondary transfer region Q4. In the case of a color toner image, the toner image that is overlaid on the surface of the intermediate transfer belt B and is primarily transferred is collectively transferred to the recording paper S secondarily.
The transfer devices T1y to T1k + T2 + B of Example 1 are configured by the primary transfer rolls T1y to T1k, the secondary transfer device T2, and the intermediate transfer belt B.

The intermediate transfer belt B after the secondary transfer is cleaned by the belt cleaner CLB as an example of the intermediate transfer body cleaner arranged on the downstream side of the secondary transfer region Q4. The belt cleaner CLB removes residues such as developer and paper dust that remain untransferred from the intermediate transfer belt B in the secondary transfer region Q4.

The recording paper S on which the toner image is transferred is guided by the paper guide SG2 after transfer and sent to the medium transport belt BH as an example of the transport member. The medium transport belt BH transports the recording paper S to the fixing device F.
The fixing device F has a heating roll Fh as an example of a heating member and a pressure roll Fp as an example of a pressure member. The recording paper S is conveyed to the fixing region Q5, which is a region where the heating roll Fh and the pressure roll Fp come into contact with each other. When the toner image of the recording paper S passes through the fixing region Q5, it is heated and pressurized by the fixing device F to be fixed.
The image recording unit U3a of the first embodiment is configured by the visible image forming apparatus UY + Gy to UK + Gk, the transfer apparatus T1y to T1k + T2 + B, and the fixing apparatus F.

A switching gate GT1 as an example of the switching member is provided on the downstream side of the fixing device F. The switching gate GT1 selectively switches the recording paper S that has passed through the fixing region Q5 to either the discharge path SH3 or the inversion path SH4 on the medium processing apparatus U4 side. The recording paper S conveyed to the discharge path SH3 is conveyed to the sheet transfer path SH5 of the medium processing apparatus U4. A curl correction member U4a as an example of a warp correction member is arranged on the paper transport path SH5. The curl correction member U4a corrects the warp, so-called curl, of the carried-in recording paper S. The curl-corrected recording paper S is discharged from the discharge roll Rh as an example of the discharge member of the medium to the discharge tray TH1 as an example of the discharge portion of the medium with the image fixing surface of the paper facing upward.

The recording paper S conveyed to the reversing path SH4 side of the image forming unit U3 by the switching gate GT1 is conveyed to the reversing path SH4 of the image forming unit U3 through the second gate GT2 as an example of the switching member.
At this time, when the image fixing surface of the recording paper S is ejected downward, the transport direction of the recording paper S is reversed after the rear end of the recording paper S in the transport direction has passed through the second gate GT2. Here, the second gate GT2 of the first embodiment is composed of a thin-film elastic member. Therefore, the second gate GT2 once passes the recording paper S conveyed to the reversing path SH4 as it is, and when the passed recording sheet S is inverted, so-called switchback, is guided to the transport paths SH3 and SH5. do. Then, the switched back recording paper S passes through the curl correction member U4a and is discharged to the discharge tray TH1 with the image fixing surface facing downward.

A circulation path SH6 is connected to the reversal path SH4 of the image forming portion U3, and a third gate GT3 as an example of the switching member is arranged at the connecting portion. Further, the downstream end of the reversing path SH4 is connected to the reversing path SH7 of the medium processing device U4.
The recording paper S conveyed to the reversing path SH4 through the switching gate GT1 is conveyed to the reversing path SH7 side of the medium processing apparatus U4 by the third gate GT3. Like the second gate GT2, the third gate GT3 of the first embodiment is composed of a thin-film elastic member. Therefore, the third gate GT3 once passes the recording paper S that has been conveyed through the reversal path SH4, and when the passing recording sheet S is switched back, it guides the recording sheet S to the circulation path SH6 side.

The recording paper S conveyed to the circulation path SH6 is retransmitted to the secondary transfer region Q4 through the medium transfer path SH2, and printing on the second side is performed.
The paper transport path SH is composed of the elements represented by the reference numerals SH1 to SH7. Further, the paper transport device SU of the first embodiment is composed of the elements represented by the reference numerals SH, Ra, Rr, Rh, SGr, SG1, SG2, BH, GT1 to GT3.

(Explanation of drive roll)
FIG. 3 is a perspective view of the drive roll of the intermediate transfer belt of the first embodiment.
4A and 4B are explanatory views of a shaft end portion of the drive roll according to the first embodiment, FIG. 4A is a sectional view of a main part, FIG. 4B is a design explanatory view of a connecting portion, and FIG. 4C is an explanatory diagram of a force acting on a gear. Is.
In FIG. 3, the drive roll Rd as an example of the rotating member has a roll body 1 as an example of a rotating body body. The roll body 1 is supported by a rotating shaft 2 extending outward in the axial direction.
In FIG. 4A, in the rotary shaft 2 of the first embodiment, a groove portion 2a along the axial direction is formed at the outer end portion in the axial direction as an example of the positioning portion. Further, a screw hole 2b is formed at the outer end of the rotating shaft 2 to which a screw for preventing the retaining screw is fastened.

In FIG. 3, the rotation shaft 2 supports an encoder 3 as an example of a first functional member and an example of a rotation detection member on the outside of the roll body 1 in the axial direction. The encoder 3 of the first embodiment is supported by the rotating shaft 2 via an encoder support member 4 as an example of a mounting member. The encoder 3 of the first embodiment is formed in a disk shape, and has a slit extending in the radial direction (not shown). Therefore, by detecting the slit with the optical sensor 5 as an example of the detection member, it is possible to detect the rotation angle and the number of rotations of the rotation shaft 2 and the roll body 1 that rotate integrally with the encoder 3.

The encoder support member 4 of the first embodiment has a cylindrical main body portion 4a. A first connecting portion 4b as an example of the first penetrating portion is formed at the outer end portion of the main body portion 4a in the axial direction. The first connecting portion 4b is formed in a cylindrical shape having an inner diameter larger than that of the main body portion 4a. An encoder support portion 4c is formed on the inner outer circumference in the axial direction with respect to the first connecting portion 4b. The encoder support portion 4c is formed in a flange shape protruding outward in the radial direction. A disk-shaped encoder 3 is supported by the encoder support portion 4c.

A bearing 6 as an example of a bearing is supported on the outer peripheral surface of the main body portion 4a of the encoder support member 4. A flange portion 6a projecting outward in the radial direction is supported on the outer peripheral surface of the bearing 6. The outside of the bearing 6, the so-called outer race, is fixedly supported by the frame 7 of the copying machine U as an example of the frame body. Further, the flange portion 6a is sandwiched between the holding member 8 and the frame 7 which are supported so as to face the frame 7, and the bearing 6 is positioned in the axial direction. Therefore, the encoder support member 4 and the encoder 3 supported by the bearing 6 are also positioned.

In FIGS. 3 and 4A, the rotary shaft 2 of the first embodiment supports a gear 11 which is an example of a second functional member and is an example of a drive transmission member on the outside of the encoder 3 in the axial direction. There is. As an example of the retaining member, the gear 11 is provided with a screw 2c mounted in the screw hole 2b to prevent the gear 11 from coming off in the axial direction.

The gear 11 has an insertion hole 11a into which the rotating shaft 2 is inserted. A key 11b, which is an example of a positioned portion and is an example of a rotation transmission portion, is formed in the insertion hole 11a. The key 11b is formed so as to extend in the axial direction and project inward in the radial direction corresponding to the groove portion 2a. Therefore, by fitting the key 11b into the groove portion 2a, the key 11b is configured to be integrally rotatable in a state where slippage in the rotation direction between the gear 11 and the rotation shaft 2 is suppressed.

In FIG. 4A, a second connecting portion 11c as an example of the second penetrating portion is formed at the inner end portion in the axial direction of the gear 11. The second connecting portion 11c is formed in a cylindrical shape, and the inner end portion in the axial direction has a guide shape 11d having a corner so as to be smoothly guided when connected to the first connecting portion 4b. Is formed.

In FIG. 4B, in the first embodiment, the length L1 of the second connecting portion 11c from the outer surface 2c of the rotating shaft 2 to the radial outer surface of the second connecting portion 11c is the second from the outer surface 2c of the rotating shaft 2. 1 The length of the connecting portion 4b to the inner surface in the radial direction is set to be larger than the length L2.
Therefore, when the gear 11 is mounted from the outside in the axial direction while the encoder 3 and the encoder support member 4 are mounted on the rotary shaft 2, the second connecting portion 11c is pushed inward in the radial direction of the first connecting portion 4b. At that time, the second connecting portion 11c and the first connecting portion 4b are pushed in while being elastically deformed. Therefore, the second connecting portion 11c receives a radial inner force from the first connecting portion 4b, and the first connecting portion 4b receives a radial outer force from the second connecting portion 11c. Therefore, the encoder support member 4 and the gear 11 are mounted on the rotary shaft 2 so as to be tightened to each other in the radial direction.

The difference between the length L1 and the length L2 (L1-L2), that is, the larger the tightening allowance, the larger the tightening force and the larger the force for pushing the gear 11 at the time of mounting. Therefore, the tightening allowance (L1-L2) can be set according to the tightening force required by the design and specifications.
In FIG. 4C, the gear 11 of the first embodiment is composed of a gear in which the outer peripheral teeth 11e are inclined in the axial direction, that is, a so-called oblique tooth gear. Then, with respect to the rotation direction of the gear 11, the force 12 received from the meshing teeth of the gear on the drive source side is inside the axial direction, that is, the component 12a in the direction in which the second connecting portion 11c is pushed into the first connecting portion 4b. The tilting direction of the tooth 11e is set so as to have it.

(Action of Example 1)
In the drive roll Rd of the first embodiment having the above configuration, when the gear 11 is mounted on the rotating shaft 2, the second connecting portion 11c is pushed into the first connecting portion 4b and connected. Therefore, the gear 11, the encoder 3, and the encoder support member 4 are fixed to the rotary shaft 2 by so-called tightening. Therefore, the gear 11 and the encoder 3 are rotatably mounted integrally with the rotating shaft 2. When the gear 11 and the encoder 3 are fixed to the rotation shaft 2, the encoder 3 exerts a function of detecting the rotation position and the number of rotations as the rotation shaft 2 rotates. Further, the gear 11 exerts a function of transmitting the rotation as the rotation shaft 2 rotates.

Then, in the first embodiment, the first connecting portion 4b and the second connecting portion 11c are tightened at the contacting portion, and a large frictional force acts between the encoder support member 4 and the gear 11. Therefore, the occurrence of slippage between the encoder 3 and the gear 11 is suppressed as compared with the configuration in which the encoder 3 does not fit tightly. Therefore, the rotary shaft 2, the encoder 3, and the gear 11 can rotate integrally in a state where they do not slip easily in the circumferential direction. Therefore, it is possible to prevent the accuracy of the detection result of the encoder 3 from being lowered and the transmission efficiency of the drive of the gear 11 from being lowered when the rotary shaft 2 is rotated.
Further, the encoder 3 and the gear 11 also have a function of being fastened and fixed to the rotary shaft 2 in addition to suppressing slippage in the circumferential direction between the rotary shaft 2 and the gear 11 obtained from the key 11b and the groove 2a. Therefore, the rotary shaft 2, the encoder 3, and the gear 11 are less likely to slip in the circumferential direction.
Even if the gear 11 and the encoder support member 4 are individually mounted on the rotary shaft 2, they will not be tightened and fitted. Therefore, in this state, the gear 11 and the encoder support member 4 can freely move in the axial direction with respect to the rotating shaft 2, and can be replaced when worn or the like.

In the conventional configuration, when the gear or the encoder is fixed to the rotating shaft, a dedicated member such as a screw for fixing the encoder to the rotating shaft is used. That is, they are fixed with screws, which are members that do not exert their functions during rotation, such as the encoder 3 and the gear 11. On the other hand, in the first embodiment, such a member dedicated to fixing is not required. Therefore, in the drive roll Rd of the first embodiment, a plurality of rotating members 4 and 11 are connected to each other and fixed to the rotating shaft 2 as compared with the case where a dedicated member for fixing the member rotating together with the rotating shaft is used. It is possible to do.
Further, in the first embodiment, the gear 11 is composed of an oblique tooth gear, and is set so that the force of the component 12a in the direction in which the gear 11 is pushed inward in the axial direction acts when the drive is transmitted. Therefore, the gear 11 is less likely to come off from the encoder 3 and the encoder support member 4 as compared with the configuration in which an outward force in the axial direction acts during drive transmission.

Next, a second embodiment of the present invention will be described. In the second embodiment, the components corresponding to the components of the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. do.
This embodiment differs from the first embodiment in the following points, but is configured in the same manner as the first embodiment in other respects.

5A and 5B are explanatory views of the rotating member of the second embodiment, FIG. 5A is an explanatory diagram corresponding to FIG. 4A of the first embodiment, and FIG. 5B is a design explanatory view corresponding to FIG. 4B of the first embodiment.
In FIG. 5, in the drive roll Rd of the second embodiment, unlike the first connecting portion 4b arranged radially outside and the second connecting portion 11c arranged radially inside, the first connecting portion is formed. 4b'is arranged radially inside and the second connecting portion 11c'is arranged radially outside. In FIG. 5B, in the second embodiment, the length L1'from the outer surface 2c of the rotating shaft 2 to the radial inner surface of the second connecting portion 11c'is, by design, from the outer surface 2c of the rotating shaft 2 to the first connecting portion 4b. The length to the outer surface in the radial direction of ′ is set to be smaller than L2 ′.

(Action of Example 2)
In the drive roll Rd of the second embodiment having the above configuration, the gear 11 and the encoder support member 4 are fixed to the rotary shaft 2 by tightening as in the first embodiment.
Therefore, as in the drive roll Rd of the first embodiment, the drive roll Rd of the second embodiment can fix the encoder 3 and the gear 11 to the rotary shaft 2 without using a dedicated member.

Next, a third embodiment of the present invention will be described. In the third embodiment, the components corresponding to the components of the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. do.
This embodiment differs from the first embodiment in the following points, but is configured in the same manner as the first embodiment in other respects.

6A and 6B are explanatory views of the rotating member of the third embodiment, FIG. 6A is an explanatory diagram corresponding to FIG. 4A of the first embodiment, and FIG. 6B is a design explanatory view corresponding to FIG. 4B of the first embodiment.
In FIG. 6, in the drive roll Rd of the third embodiment, unlike the first connecting portion 4b arranged radially outside and the second connecting portion 11c arranged radially inside, the drive roll Rd extends in the axial direction. The ring-shaped groove portion 32a into which the cylindrical first connecting portion 31 is fitted is formed in the second connecting portion 32. In FIG. 6B, in the design of the third embodiment, the length L1 from the outer surface 2c of the rotating shaft 2 to the radial outer surface of the second connecting portion 32 is from the outer surface 2c of the rotating shaft 2 as in the first embodiment. The length of the first connecting portion 31 to the inner surface in the radial direction is set to be larger than the length L2. Then, in the third embodiment, the radial width L11 of the groove portion 32a is set to be smaller than the radial thickness L12 of the first connecting portion 31.

(Action of Example 3)
In the drive roll Rd of the third embodiment having the above configuration, similarly to the first embodiment, the gear 11 and the encoder support member 4 are fastened and fitted to the rotary shaft 2. Further, since the length is set to L11 <L12, the first connecting portion 31 receives a force sandwiched by the second connecting portion 32 from both sides in the radial direction. Therefore, the frictional force between the first connecting portion 31 and the second connecting portion 32 is also increased, so that slipping in the rotational direction is suppressed and it is difficult to pull out in the axial direction.

Next, a fourth embodiment of the present invention will be described. In the fourth embodiment, the components corresponding to the components of the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. do.
This embodiment differs from the first embodiment in the following points, but is configured in the same manner as the first embodiment in other respects.

7 is an explanatory diagram of the rotating member of the fourth embodiment, FIG. 7A is an explanatory diagram corresponding to FIG. 4A of the first embodiment, and FIG. 7B is a design explanatory diagram corresponding to FIG. 4B of the first embodiment.
In FIG. 7, in the drive roll Rd of the fourth embodiment, unlike the first connecting portion 4b arranged radially outside and the second connecting portion 11c arranged radially inside, the first connecting portion is formed. An O-ring 43 as an example of an elastic body is arranged between the 41 and the second connecting portion 42.
In FIG. 7B, in the fourth embodiment, unlike the first embodiment, the length L1 <the length L2 is set, but the O-ring 43 has a rotation shaft in a state of natural length without elastic deformation. The length L31 along the radial direction of 2 is set to be larger than the difference in length (L2-L1). That is, L2-L1 <L31 is set.

(Action of Example 4)
In the drive roll Rd of the fourth embodiment having the above configuration, when the gear 11 is mounted on the encoder support member 4, the O-ring 43 is elastically deformed to exert a force for tightening in the radial direction. Therefore, the drive roll Rd of the fourth embodiment is also fixed to the rotary shaft 2 by tightening and fitting the gear 11 and the encoder support member 4 as in the first to third embodiments.

Next, a fifth embodiment of the present invention will be described. In the fifth embodiment, the components corresponding to the components of the second embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. do.
This embodiment differs from the second embodiment in the following points, but is configured in the same manner as the second embodiment in other respects.

8 is an explanatory diagram of the rotating member of the fifth embodiment, FIG. 8A is an explanatory diagram corresponding to FIG. 5A of the second embodiment, and FIG. 8B is a design explanatory diagram corresponding to FIG. 5B of the second embodiment.
In FIG. 8, in the drive roll Rd of the fifth embodiment, unlike the first connecting portion 4b ′ arranged radially inside and the second connecting portion 11c ′ arranged radially outside, the first connecting portion 11c ′ is arranged. An O-ring 53 as an example of an elastic body is arranged between the connecting portion 51 and the second connecting portion 52.
In FIG. 8B, in the fifth embodiment, unlike the second embodiment, the length L1 ′> the length L2 ′ is set, but the O-ring 53 is in a state of natural length without elastic deformation. The length L41 along the radial direction of the rotating shaft 2 is set to be larger than the difference in length (L1'-L2'). That is, L1'-L2'<L41 is set.

(Action of Example 5)
In the drive roll Rd of the fifth embodiment having the above configuration, when the gear 11 is mounted on the encoder support member 4, the O-ring 53 is elastically deformed to exert a force for tightening in the radial direction. Therefore, the drive roll Rd of the fifth embodiment is also fixed to the rotary shaft 2 by tightening and fitting the gear 11 and the encoder support member 4 as in the first to fourth embodiments.

Next, a sixth embodiment of the present invention will be described. In the sixth embodiment, the components corresponding to the components of the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. do.
This embodiment differs from the first embodiment in the following points, but is configured in the same manner as the first embodiment in other respects.

9 is an explanatory view of the rotating member of the sixth embodiment, FIG. 9A is an explanatory view corresponding to FIG. 4A of the first embodiment, FIG. 9B is a design explanatory view corresponding to FIG. 4B of the first embodiment, and FIG. 9C. Is a perspective view of the gear.
In FIG. 9, in the drive roll Rd of the sixth embodiment, the first connecting portion 61 which is different from the first connecting portion 4b arranged radially outside and the second connecting portion 11c arranged radially inside. And has a second connecting portion 62. In the first connecting portion 61 of the sixth embodiment, the hooked portion 61a is formed at the outer end portion in the axial direction. The hooked portion 61a is formed in a ring shape extending inward in the radial direction. In FIGS. 9A and 9C, in the second connecting portion 62, a hanging portion 62a is formed at an inner end portion in the axial direction. The hanging portion 62a is formed in a semi-cylindrical shape (see FIG. 9C), and has a claw portion 62b (see FIG. 9A) extending outward in the radial direction. In FIG. 9C, a gap portion 62c is formed between the hanging portions 62a, and the hanging portions 62a are vertically arranged in pairs with the gap portion 62c interposed therebetween. Therefore, by having the gap portion 62c, the hanging portion 62a is configured to be elastically deformable.

In FIG. 9B, in the sixth embodiment, the length L51 from the outer surface of the rotating shaft 2 to the radial inner end of the hooked portion 61a extends from the outer surface of the rotating shaft 2 to the radial outer surface of the hanging portion 62a. The length is set to be smaller than L52. That is, L51 <L52 is set.

(Action of Example 6)
In the drive roll Rd of the sixth embodiment having the above configuration, when the gear 11 is mounted on the encoder support member 4, the hooking portion 62a is elastically deformed and mounted on the hooked portion 61a. It is fitted with a so-called snap fit. Then, in the mounted state, the claw portion 62b is caught in the hooked portion 61a, and the claw portion 62b is prevented from coming off in the axial direction.
Further, in the sixth embodiment, L51 <L52 is set, and when the gear 11 is connected to the encoder support member 4, the hooking portion 62a is in a state of pushing the hooked portion 61a. Therefore, a frictional force acts between the gear 11 and the encoder support member 4, and deviation in the circumferential direction is less likely to occur during rotation.

The hanging portion 62a has a semi-cylindrical shape divided by two gap portions 62c, but the shape is not limited to this. For example, it is possible to change the shape such that the gaps have one shape, that is, a so-called C-shaped cylinder wall, three gaps are formed at 120 ° intervals, four gaps are formed at 90 ° intervals, and the like. .. In addition, it is possible to have a shape in which there is no gap and the shape is squeezed toward the inside or the outside in the axial direction. That is, the second connecting portion 62 can have an arbitrary shape so as to be elastically deformable.

(Change example)
Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various modifications are made within the scope of the gist of the present invention described in the claims. Is possible. Examples of modifications (H01) to (H08) of the present invention are illustrated below.
(H01) In the above embodiment, the configuration by the copying machine U as an example of the image forming apparatus is illustrated, but the present invention is not limited to this, and the present invention can be applied to FAX, a multifunction device having a plurality of these functions, and the like. Further, the image forming apparatus is not limited to multicolor development, and can be configured by a monochromatic, so-called monochrome image forming apparatus, and is not limited to the so-called tandem type image forming apparatus, and is not limited to a rotary type image forming apparatus. It is also applicable to.

(H02) In the above embodiment, the drive roll Rd of the intermediate transfer belt B has been exemplified as an example of the rotating member, but the present invention is not limited thereto. For example, it can be applied to the rollers of the photoconductor drums Py to Pk and the developing devices Gy to Gk, the fixing rolls Fh and Fp of the fixing device F, the transport rolls arranged in the paper transport path SH, and the like. It can also be applied to a cam (rotating member) that operates another member. Further, it can be applied to a developer transporting member (rotating member) having a rotating shaft and a spiral transporting portion (rotating body main body).
(H03) In the above embodiment, the encoder 3 and the gear 11 are exemplified as an example of the functional member, but the present invention is not limited thereto. For example, it can be attached to a rotating shaft such as a flange member (biased correction member) for contacting the edge of the belt to prevent the belt from shifting or falling off, or a flywheel (inertial wheel) for stabilizing rotation. It can be applied to any functional member.

(H04) In the above embodiment, the encoder 3 is exemplified as an example of the supported body supported inside the connected member in the axial direction, but the present invention is not limited thereto. It can be applied to any configuration that can be connected to the rotating shaft, and it is also possible to use the flange member, flywheel, etc. described in (H03).
(H05) In the above embodiment, the configuration in which the encoder 3 and the gear 11 are arranged on one side in the axial direction is illustrated, but it is also possible to arrange them on both sides.
(H06) In the first to fifth embodiments, it is desirable that the key 11b and the groove 2a are provided, but it is also possible to provide a configuration in which the key 11b and the groove 2a are not provided.

(H07) In the above embodiment, it is desirable to set the gear 11 to the oblique tooth gear, but it is also possible to use a spur gear. Further, if the connection between the encoder support member 4 and the gear 11 is strong, the inclination direction of the teeth 11e can be opposite to that of the embodiment.
(H08) In the above embodiment, the configuration in which the encoder support member 4 and the encoder 3 are separate bodies is exemplified, but the present invention is not limited thereto. It is also possible to have an integrated configuration.

2 ... Rotation axis,
2a ... Positioning unit,
3 ... First functional member, rotation detection member,
4b, 4b', 31, 41, 51, 61 ... First penetration,
11 ... Second functional member, drive transmission member, diagonal gear,
11b ... Positioned portion,
11c, 11c', 32, 42, 52, 62 ... Second penetration,
43, 53 ... Elastic body,
61a ... Covered part,
62a ... Hanging part,
B ... Intermediate transcript,
F ... Fixing device,
L1-L2, L2'-L1'... Tightening allowance,
Py, Pm, Pc, Pk ... Image holder,
Rd ... Rotating member,
S ... medium,
T2b ... Transfer member,
U ... Image forming apparatus.

Claims (8)

The axis of rotation and
A first functional member having a first penetrating portion through which the rotating shaft penetrates the inside and exerting a function with the rotation of the rotating shaft.
A second functional member having a second penetrating portion through which the rotating shaft penetrates the inside and exerting a function with the rotation of the rotating shaft, wherein the first one is in the axial direction of the rotating shaft. The first functional member is supported adjacent to the functional member and is connected to the first functional member movably supported with respect to the rotation axis before the second functional member is mounted. The second functional member for fixing the functional member to the rotating shaft, and
Equipped with
Each of the penetrating portions has a circular cross-sectional shape, and the outer peripheral surface of the first penetrating portion and the second penetrating portion has a tightening allowance with respect to the inner peripheral surface of one of the first penetrating portion and the first penetrating portion. When the functional member and the second functional member are tightly fitted, the position of the first functional member in the rotational direction with respect to the second functional member is fixed.
A rotating member characterized by that. The axis of rotation and
A first functional member having a first penetrating portion through which the rotating shaft penetrates the inside and exerting a function with the rotation of the rotating shaft.
A second functional member having a second penetrating portion through which the rotating shaft penetrates the inside and exerting a function with the rotation of the rotating shaft, wherein the first one is in the axial direction of the rotating shaft. The first functional member is supported adjacent to the functional member and is connected to the first functional member movably supported with respect to the rotation axis before the second functional member is mounted. The second functional member for fixing the functional member to the rotating shaft, and
Equipped with
Each of the penetrating portions having a circular cross section has an elastic body supported between the inner peripheral surface of one of the first penetrating portion and the second penetrating portion and the outer peripheral surface of the other. When the first functional member and the second functional member are attached, they are elastically deformed to fix the position of the first functional member in the rotational direction with respect to the second functional member.
A rotating member characterized by that. The axis of rotation and
A first functional member having a first penetrating portion through which the rotating shaft penetrates the inside and exerting a function with the rotation of the rotating shaft.
A second functional member having a second penetrating portion through which the rotating shaft penetrates the inside and exerting a function with the rotation of the rotating shaft, wherein the first one is in the axial direction of the rotating shaft. The first functional member is supported adjacent to the functional member and is connected to the first functional member movably supported with respect to the rotation axis before the second functional member is mounted. The second functional member for fixing the functional member to the rotating shaft, and
A hooked portion formed on one of the first penetrating portion and the second penetrating portion,
A hooking portion formed on the other of the first penetrating portion and the second penetrating portion, and hooked on the hooked portion when the first functional member and the second functional member are mounted.
A rotating member characterized by being equipped with. The axis of rotation and
A first functional member having a first penetrating portion through which the rotating shaft penetrates the inside and exerting a function with the rotation of the rotating shaft.
A second functional member having a second penetrating portion through which the rotating shaft penetrates the inside and exerting a function with the rotation of the rotating shaft, wherein the first one is in the axial direction of the rotating shaft. The first functional member is supported adjacent to the functional member and is connected to the first functional member movably supported with respect to the rotation axis before the second functional member is mounted. The second functional member for fixing the functional member to the rotating shaft, and
A positioned portion provided on either of the first functional member and the second functional member, which is provided in contact with the positioning portion provided on the rotating shaft and is positioned in the circumferential direction.
A rotating member characterized by being equipped with. The axis of rotation and
A first functional member having a first penetrating portion through which the rotating shaft penetrates the inside and exerting a function with the rotation of the rotating shaft.
A second functional member having a second penetrating portion through which the rotating shaft penetrates the inside and exerting a function with the rotation of the rotating shaft, wherein the first one is in the axial direction of the rotating shaft. The first functional member is supported adjacent to the functional member and is connected to the first functional member movably supported with respect to the rotation axis before the second functional member is mounted. The second functional member for fixing the functional member to the rotating shaft, and
The first functional member composed of a rotation detection member that detects rotation, and
A rotating member characterized by being equipped with. The axis of rotation and
A first functional member having a first penetrating portion through which the rotating shaft penetrates the inside and exerting a function with the rotation of the rotating shaft.
A second functional member having a second penetrating portion through which the rotating shaft penetrates the inside and exerting a function with the rotation of the rotating shaft, wherein the first one is in the axial direction of the rotating shaft. The first functional member is supported adjacent to the functional member and is connected to the first functional member movably supported with respect to the rotation axis before the second functional member is mounted. The second functional member for fixing the functional member to the rotating shaft, and
The second functional member composed of the drive transmission member for transmitting the drive, and the second functional member.
A rotating member characterized by being equipped with. The drive transmission member, which is composed of an oblique tooth gear having teeth inclined with respect to the axial direction of the rotating shaft, and receives a force in a direction toward the first functional member during rotation from the meshed gear.
The rotating member according to claim 6 , wherein the member is provided with. Image holder and
An intermediate transfer body to which the image of the surface of the image holder is transferred, and
The rotating member according to any one of claims 1 to 7 for rotating the intermediate transfer member, and the rotating member.
A transfer member that transfers the image of the intermediate transfer body to a medium, and
A fixing device for fixing an image on the medium and a fixing device
An image forming apparatus characterized by being equipped with.

Images