JP5978756B2 - Support mechanism and image forming apparatus - Google Patents

Description

  The present invention relates to a support mechanism and an image forming apparatus.

  In an electrophotographic image forming apparatus, a technique for transmitting a driving force to a photosensitive drum by a shaft coupling is known. For example, Patent Document 1 discloses an image forming system including a photosensitive drum and a drum driving gear connected by a coupling shaft biased by a compression coil spring, and a cam lever that pushes the coupling shaft in a direction in which the compression coil spring is compressed. An apparatus is described.

JP-A-11-167335

  An object of the present invention is to link the connection of the shaft coupling and the positioning of the bearing, and to link the disconnection of the shaft coupling and the release of the positioning of the bearing.

According to a first aspect of the present invention, there is provided a bearing support portion that supports a bearing and is opened so that the bearing is removed in a first direction that intersects the rotating shaft supported by the bearing, and one end of the rotating shaft. A drive-side shaft joint that transmits a driving force to the rotary shaft by being connected to a rotary shaft-side shaft joint provided on the rotary shaft, a contact member having a bearing contact portion that contacts the bearing, and the drive-side shaft joint. Extruding means for connecting the drive side shaft joint to the rotary shaft side shaft joint by pushing out toward the rotary shaft side shaft joint while being connected to the drive source, and the drive side shaft provided on the contact member A drive-side shaft joint contact portion that contacts the joint , and the bearing contact portion regulates movement of the bearing in the first direction when the contact member is located at the first position. And the contact member is in contact with the bearing. When the serial first position moved in a second direction intersecting with the rotation axis, spaced from the bearing so as not to restrict movement in the first direction of the bearing, the drive-side shaft joint When the contact member is located at the first position, the pusher is pushed toward the rotary shaft side joint by the pushing means so as to be connected to the rotary shaft side joint, and the contact member is Provided is a support mechanism that is pulled back by the drive-side shaft joint contact portion so as to be separated from the rotary shaft-side shaft joint when moved from the first position in the second direction .

  According to a second aspect of the present invention, in the support mechanism according to the first aspect, a housing that houses the support mechanism and the rotating body having the rotating shaft, and a surface of the housing are opened and closed. And when the opening / closing part is closed, the contact member is positioned at the first position, and when the opening / closing part is opened, the contact member is moved from the first position to the second position. And a link mechanism for moving in the direction.

According to a third aspect of the present invention, in the support mechanism according to the first or second aspect, a flange is provided on the outer peripheral surface of the drive side shaft joint, and the drive side shaft joint contact portion is the rotation shaft side shaft. With respect to the second direction, the drive side shaft joint is pulled back in a direction that contacts the flange from the joint side and moves away from the rotary shaft side shaft joint as the contact member moves in the second direction. It is characterized by being inclined.
The invention according to claim 4 is the support mechanism according to any one of claims 1 to 3 , wherein the bearing support portion contacts the outer peripheral surface of the bearing at two locations in the circumferential direction of the bearing. The bearing contact portion regulates movement of the bearing in the first direction by contacting the outer peripheral surface of the bearing at one place in the circumferential direction of the bearing.

According to a fifth aspect of the present invention, there is provided a support mechanism according to any one of the first to fourth aspects, a driving source that transmits a driving force to the driving side shaft coupling, an image holding body, and a rotation shaft of the image holding body. A bearing supported by the bearing support portion, a rotary shaft side shaft joint provided at one end of the rotary shaft, an image forming means for forming an image on the image carrier, and the image carrier. There is provided an image forming apparatus comprising transfer means for transferring a formed image to a recording medium.

According to the first, third, and fifth aspects of the invention, the connection of the shaft coupling and the positioning of the bearing can be interlocked, and the disconnection of the shaft coupling and the release of the positioning of the bearing can be interlocked.
According to the second aspect of the invention, the operation of closing the opening / closing portion, the connection of the shaft coupling and the positioning of the bearing are interlocked, and the operation of opening the opening / closing portion, the disconnection of the shaft coupling and the release of the positioning of the bearing are interlocked. Can be made.
According to the invention which concerns on Claim 4 , compared with the case where it is not the structure which contacts a bearing in three places of the circumferential direction, a bearing can be positioned correctly.

2 is a right side view of the image forming apparatus 100. FIG. 2 is a plan view of the image forming apparatus 100. FIG. FIG. 4 is a cross-sectional view of the support mechanism 41A viewed from the back side of the image forming apparatus 100. FIG. 4 is a cross-sectional view of the support mechanism 41A viewed from the back side of the image forming apparatus 100. The figure which shows the rotating shaft side shaft coupling 50. FIG. The figure which shows the drive side shaft coupling 60. FIG. 2 is a right side view of the image forming apparatus 100. FIG. 2 is a right side view of the image forming apparatus 100. FIG. The figure which expanded and showed the vicinity of the bearing support part 42 in FIG. The figure which expanded and showed the vicinity of the bearing support part 42 in FIG. The right view of the link mechanism 44. FIG. The left view of the link mechanism 44. FIG. The figure which shows the contact member 45. FIG. The figure which shows the positional relationship of the contact member 45 and the drive side shaft coupling 60.

  FIG. 1 is a right side view of the image forming apparatus 100. This figure shows the main components related to image formation. In the figure, the right side is the back side of the image forming apparatus 100, the left side is the front side, the near side is the right side, and the back side is the left side. In the following description, “front side”, “back side”, “right side”, and “left side” all indicate directions with respect to the image forming apparatus 100. Also, the direction from the front side to the back side of the image forming apparatus 100 is the + X direction, the direction from the right side to the left side of the image forming apparatus 100 is the + Y direction, and from the lower side to the upper side of the image forming apparatus 100. The direction to go is the + Z direction. The same applies to the coordinate axes in FIG.

  The control unit 1 includes a central processing unit (CPU) that is an arithmetic device, a read only memory (ROM) and a random access memory (RAM) that are storage devices, and the CPU executes an OS stored in the ROM. Thus, each part of the image forming apparatus 100 is controlled. The control unit 1 has a communication I / F (Interface), and receives data from other devices via a LAN (Local Area Network). The control unit 1 converts the received data into bitmap format image data and outputs the image data to the writing unit 13.

  Sheet-like recording media P such as paper are stacked and accommodated in the medium accommodating portion 31, and the feeding roller 32 sends the recording media P one by one to the conveying path 34 in synchronization with the operation of the photosensitive member 11. . By driving the conveyance roller 33 provided on the conveyance path 34, the recording medium P is conveyed in the direction of arrow B along the conveyance path 34.

A charging unit 12, a writing unit 13, a developing unit 14, and a transfer unit 15 are provided around the photoconductor 11 (an example of a rotating body and an image holding body).
The photosensitive member 11 is a rotating member that is driven to rotate in the direction of arrow A by a motor (not shown), and a photosensitive layer made of a semiconductor whose potential is changed by light irradiation is provided on the surface thereof. .
The charging unit 12 (an example of an image forming unit) is, for example, a corotron type charging device, a roller type charging device, or the like, and charges the surface of the photoconductor 11 to a predetermined potential.

  The writing unit 13 (an example of an image forming unit) writes a latent image on the photoconductor 11 based on the image data. Specifically, the writing unit 13 generates a laser beam LB corresponding to the gradation of each pixel represented by the image data supplied from the control unit 1, and the surface of the photoconductor 11 is scanned with the laser beam LB. A latent image is formed by scanning in the axial direction (main scanning direction) of the photoconductor 11. As the photoconductor 11 is driven to rotate, writing of latent images in units of scanning lines in the main scanning direction is repeated in the circumferential direction (sub-scanning direction) of the photoconductor 11.

  The developing unit 14 (an example of an image forming unit) develops the latent image written on the photoconductor 11. Specifically, a two-component developer composed of toner and carrier is accommodated in the developing unit 14. The toner is obtained by coloring resin powder with a black color material. The carrier is a powder made of a magnetic material. The housing of the developing unit 14 has an opening on the side facing the photoconductor 11, and a developing roller is provided inside the housing so that the outer circumferential surface of the photoconductor 11 faces each other. The two-component developer adheres to the outer peripheral surface of the rotationally driven developing roller. A developing bias voltage having a polarity opposite to that of the latent image is applied to the developing roller, and the toner is charged by the developing bias voltage. As a result, the toner is transferred onto the latent image by electrostatic attraction. In this way, the latent image is developed with toner, and a toner image is formed on the photoreceptor 11.

  The transfer unit 15 (an example of a transfer unit) is, for example, a corotron type charging device, a roller type charging device or the like, and is provided at a position facing the photoconductor 11 with the conveyance path 34 interposed therebetween. A transfer bias voltage having a polarity opposite to that of the toner image on the photoconductor 11 is applied to the transfer unit 15, and the recording medium P is charged by the transfer bias voltage. As a result, the toner image is transferred to the recording medium P by electrostatic attraction. Is done.

The fixing unit 16 includes a heating member having a heat source and a pressure member pressed against the heating member, and melts and presses the toner image by sandwiching the medium P between the heating member and the pressure member. The toner image is fixed on the recording medium P.
The discharge unit 35 is a recess provided at the exit of the conveyance path 34 on the upper surface of the housing 40 and having a size to accommodate the recording medium P. The recording medium P on which the toner image is fixed by the fixing unit 16 is discharged from the exit of the conveyance path 34 to the discharge unit 35.

FIG. 2 is a plan view (perspective view) of the image forming apparatus 100 and shows main components related to the support of the photoconductor 11. One end of the rotating shaft 111 of the photoconductor 11 is supported by the support mechanism 41A, and the other end is supported by the support mechanism 41B. In the following description, unless otherwise specified, the longitudinal direction of the rotating shaft 111 is referred to as the axial direction, and the direction in which the photoconductor 11 rotates is referred to as the circumferential direction.
3 and 4 are cross-sectional views (II direction in FIG. 1) of the support mechanism 41A viewed from the back side of the image forming apparatus 100. FIG. 3 and 4 show states before and after the movement of the contact member 45, the movement of the contact member 45 will be described later.

  FIG. 5 is a view showing the rotary shaft side shaft coupling 50. The rotation shaft side shaft coupling 50 is a cylindrical member, and a first recess 51 into which one end of the rotation shaft 111 is fitted is formed. The cross section in the axial direction of the first recess 51 is a shape obtained by deforming a part of a circle, and one end of the rotating shaft 111 is also formed in a shape corresponding to this cross section. A second recess 52 is formed on the opposite side of the first recess 51. The second recess 52 is formed by forming one or more key grooves 53 extending in the axial direction in a cavity having a circular cross section in the axial direction.

FIG. 6 is a view showing the drive side shaft coupling 60.
The drive-side shaft coupling 60 transmits a driving force to the rotary shaft 111 by being connected to the rotary shaft-side shaft joint 50 provided at one end of the rotary shaft 111. The flange 64 is provided on the outer peripheral surface of the drive side shaft joint 60. Specifically, it is as follows.
The drive-side shaft coupling 60 has a cylindrical main body 61, and a first key 62 corresponding to the key groove 53 of the rotary shaft-side shaft coupling 50 is formed on the outer peripheral surface on one end side of the main body 61. A second key 63 is formed on the outer peripheral surface on the other end side of the main body 61. A flange 64 is formed on the outer peripheral surface of the main body 61. A third recess 65 is formed on the end surface of the main body 61 on the side where the second key 63 is provided.
As shown in FIG. 3, one end of the rotating shaft 111 is fitted into the first recess 51 of the rotating shaft side shaft coupling 50. The bearing 112 supports the rotary shaft 111 via the rotary shaft side shaft joint 50. The bearing support portion 42 is fixed to the housing 40 and supports the bearing 112.

  The motor 70 (an example of a drive source) is fixed to the housing 40. The motor 70 includes a rotor 71 and a stator 72, and a fourth recess 73 having a key groove (not shown) corresponding to the second key 63 of the drive side shaft joint 60 is provided at the center of the rotor 71. Is formed. The axial length L1 of the drive side shaft coupling 60 is shorter than the distance L2 from the bottom surface of the second recess 52 to the bottom surface of the fourth recess 73. Accordingly, the drive-side shaft coupling 60 can move in the axial direction over a distance (L2-L1) in the space between the second recess 52 and the fourth recess 73. The depth D1 of the second recess 52 is shallower than (L2-L1), and the depth of the fourth recess 73 is deeper than (L2-L1). Therefore, regardless of the position of the drive side shaft joint 60, the state where the second key 63 of the drive side shaft joint 60 is fitted in the key groove of the fourth recess 73 is maintained.

  The spring 74 (an example of an extrusion means) connects the drive side shaft joint 60 to the rotary shaft side shaft joint 50 by pushing the drive side shaft joint 60 toward the rotary shaft side shaft joint 50 while being connected to the motor 70. . Specifically, a spring 74 that generates a repulsive force in the axial direction is interposed between the bottom surface of the third recess 65 and the bottom surface of the fourth recess 73, and the drive side shaft is driven by the repulsive force of the spring 74. The joint 60 is pushed out toward the rotary shaft side shaft joint 50. When the drive side shaft joint 60 is pushed out, the first key 62 of the drive side shaft joint 60 is fitted into the key groove 53 of the rotary shaft side shaft joint 50. Accordingly, when the drive side shaft joint 60 is pushed out, the driving force of the motor 70 is transmitted to the rotary shaft 111 via the drive side shaft joint 60 and the rotary shaft side shaft joint 50.

7 and 8 are right side views (perspective views) of the image forming apparatus 100. FIG. 7 is a diagram when the contact member 45 is located at the first position, and FIG. 8 is a diagram when the contact member 45 is moved from the first position in the second direction (the direction of the arrow D). FIG.
9 and 10 are enlarged views of the vicinity of the bearing support portion 42 in FIGS. 7 and 8, respectively.

  The opening / closing part 43 is coupled to the housing 40 by a hinge 431, and is opened and closed as illustrated. The contact member 45 is located in the first position when the opening / closing part 43 is closed, and is moved in the second direction from the first position when the opening / closing part 43 is opened.

The bearing support portion 42 supports the bearing 112 and is open so that the bearing 112 is removed in a first direction that intersects the rotating shaft 111 supported by the bearing 112. Specifically, it is as follows.
The bearing support portion 42 includes a first support portion 421 and a second support portion 422, and the first support portion 421 and the second support portion 422 are formed in a planar shape, and 2 in the circumferential direction of the bearing 112. Each part contacts the outer peripheral surface of the bearing 112. The first support portion 421 is located below the bearing 112, and the second support portion 422 is located on the back side of the bearing 112. Since the first support part 421 is provided with an inclination so as to descend toward the back side, the bearing 112 is supported by the first support part 421 and the second support part 422 without dropping off. The bearing support portion 42 is opened toward the front side obliquely upward direction (the direction of the arrow C, the first direction).
Two bearing guide portions 423 are provided from the first support portion 421 and the second support portion 422 in the first direction. When the photosensitive member 11 is replaced, the bearing 112 has two bearing guide portions 423. Is allowed to pass through the space between.

FIG. 11 is a right side view of the link mechanism 44. FIG. 12 is a left side view of the link mechanism 44. The link mechanism 44 is a mechanism for interlocking the opening / closing part 43 and the contact member 45.
An end portion on the front side of the first link member 441 is connected to a surface on the back side of the opening / closing portion 43 by a hinge 432 (see FIG. 2). A guide hole 442 a having a cross section extending in the longitudinal direction of the second link member 442 is formed in the vicinity of the front end portion of the second link member 442. A pin 441a provided at an end portion on the back side of the first link member 441 passes through the guide hole 442a, and the first link member 441 can rotate with respect to the second link member 442 using the pin 441a as a fulcrum. , And can move along the guide hole 442a.

Guide holes 442b having a cross section extending in the longitudinal direction of the second link member 442 are formed at two locations in the longitudinal direction in a portion on the back side of the guide hole 442a of the second link member 442. Each of the guide holes 442b passes through an axial column 444 that is fixed to the housing 40, and the second link member 442 can move in the longitudinal direction.
Near the end on the back side of the second link member 442, a guide hole 442c having a cross section extending obliquely downward on the back side is formed. An additional member 454 is provided at the lower portion of the contact member 45, and a pin 455 provided on the additional member 454 is passed through the guide hole 442c. The two guide portions 46 are formed in the housing 40 so as to extend obliquely downward on the front side (the direction of the arrow D, the second direction), and the contact member 45 is sandwiched between the two guide portions 46. Can move in the second direction and in the opposite direction.

FIG. 13 is a diagram showing the contact member 45. FIG. 14 is a diagram showing a positional relationship between the contact member 45 and the drive side shaft coupling 60.
The contact member 45 has a bearing contact portion 451 that contacts the bearing 112. When the contact member 45 is located at the first position, the bearing contact portion 451 contacts the bearing 112 so as to restrict movement of the bearing 112 in the first direction, and the contact member 45 is located at the first position. Is moved away from the bearing 112 so as not to restrict the movement of the bearing 112 in the first direction.

  The bearing contact portion 451 has a contact portion formed in a planar shape, and this contact portion is brought into contact with the outer peripheral surface of the bearing 112 from the front side of the bearing 112. Further, the extension member 454 and the contact member 45 are connected by a spring 456, and the contact member 45 is pushed out in the direction opposite to the second direction by the repulsive force of the spring 456. Therefore, the bearing contact is made at the first position. The portion 451 is pressed against the outer peripheral surface of the bearing 112. Although the bearing 112 is not illustrated in FIG. 14, the rotary shaft side shaft joint 50 is connected to the side on which the first key 62 of the drive side shaft joint 60 is provided, and the rotary shaft side shaft joint 50 is connected to the bearing 112. Will support. That is, the bearing 112 is provided on the back side of the bearing contact portion 451 in FIG.

The contact member 45 includes a drive side shaft joint contact portion 452 that contacts the flange 64 from the rotary shaft side shaft joint 50 side. The drive side shaft joint contact portion 452 has a contact portion extending obliquely upward on the left side surface of the image forming apparatus 100, and this contact portion is brought into contact with the flange 64 from the right side surface side. The contact portion is provided to be inclined with respect to the second direction so that the drive side shaft coupling 60 is pulled back in a direction away from the rotary shaft side shaft coupling 50 as the contact member 45 moves in the second direction. Yes. When the contact member 45 is located at the first position, the drive side shaft joint 60 is pushed out toward the rotary shaft side shaft joint 50 by the spring 74 so as to be connected to the rotary shaft side shaft joint 50 and is in contact with the drive side shaft joint 60. When the member 45 is moved in the second direction from the first position, the member 45 is pulled back by the drive side shaft joint contact portion 452 so as to be separated from the rotary shaft side shaft joint 50.
The support mechanism 41B is configured in the same manner as the support mechanism 41A except that the contact member 45 does not include the drive side shaft joint contact portion 452.

Next, the operation of this embodiment will be described.
When the opening / closing part 43 is closed, the first link member 441 and the second link member 442 are pushed into the back side, and the contact member 45 is positioned at the first position (FIGS. 7 and 9). FIG. 11 (b) and FIG. 11 (c)). When the bearing contact portion 451 of the contact member 45 contacts the bearing 112 at the first position, movement of the bearing 112 in the first direction is restricted (see FIG. 9). The bearing 112 is positioned by being supported at three points in the circumferential direction by the bearing contact portion 451 and the first support portion 421 and the second support portion 422 of the bearing support portion 42. Further, since the drive side shaft joint contact portion 452 of the contact member 45 does not pull back the flange 64, the drive side shaft joint 60 is pushed out by the spring 74. As a result, the drive side shaft joint 60 is connected to the rotary shaft side shaft joint 50 (see FIGS. 3 and 14A).

  When the opening / closing part 43 is opened (see FIGS. 8 and 11A), the first link member 441 is moved to the front side while rotating counterclockwise, and accordingly, the second link member 442 is moved. It is moved to the front side. Since the guide hole 442c extends obliquely downward on the back side, the contact member 45 is moved in the second direction as the second link member 442 moves. As a result, the bearing contact portion 451 is separated from the bearing 112, and the movement of the bearing 112 in the first direction is not restricted (see FIG. 10). That is, the positioning of the bearing 112 is released. Further, since the contact member 45 is moved in the second direction while the drive side shaft joint contact portion 452 is in contact with the flange 64, the flange 64 is pulled back by the drive side shaft joint contact portion 452 (see FIG. 14B). ). As a result, the drive side shaft joint 60 is pulled back in a direction away from the rotary shaft side shaft joint 50, and the drive side shaft joint 60 is separated from the rotary shaft side shaft joint 50 (see FIG. 4).

According to the present embodiment, when the opening / closing part 43 is opened, the positioning of the bearing 112 is released and the drive-side shaft coupling 60 is disconnected from the rotary shaft-side shaft joint 50 in conjunction with each other. Further, when the opening / closing part 43 is closed, the positioning of the bearing 112 and the connection of the drive side shaft joint 60 to the rotary shaft side shaft joint 50 are performed in conjunction with each other.
Further, the drive side shaft joint 60 is separated from the rotary shaft side shaft joint 50 by moving the drive side shaft joint 60 in a direction away from the rotary shaft side shaft joint 50. The space for moving to is no longer necessary.
In addition, since the contact member 45 has two functions of positioning the bearing 112 and detaching the drive-side shaft coupling 60, the number of parts is reduced as compared with a configuration in which these functions are realized by separate parts.

<Modification>
You may deform | transform said embodiment like the modification shown below. Moreover, you may combine embodiment and a modification. A plurality of modified examples may be combined.

  In the embodiment, an example in which the bearing 112 supports the rotating shaft 111 via the rotating shaft side shaft joint 50 is shown. However, the bearing 112 directly supports the rotating shaft 111 without using the rotating shaft side shaft joint 50. It may be.

  In the embodiment, the driving side shaft coupling 60 is connected to the rotor 71 of the motor 70. However, the driving force of the motor 70 may be transmitted to the driving side shaft coupling 60 via a gear train.

  In the embodiment, the photoconductor 11 is shown as an example of the rotating body. However, the present invention may be applied as a support mechanism for a bearing of a rotating shaft such as a developing roller, a roller charging device, or a roller transfer device. Good.

  In the embodiment, the example in which the photoconductor 11 is replaced alone has been described. However, components such as the charging unit 12, the developing unit 14, and a removal unit that removes toner remaining on the photoconductor 11 are provided around the photoconductor 11. The present invention may be applied to an image forming apparatus using a cartridge in which one or more of them are integrated with the photoreceptor 11.

  In the embodiment, an example is shown in which the bearing 112 is positioned by supporting the bearing 112 at three points in the circumferential direction. However, for example, a bearing support portion in which a curved surface along the outer peripheral surface of the bearing 112 is formed may be provided. .

  In the embodiment, the example in which the positioning or release of the bearing 112 and the connection or disconnection of the drive-side shaft coupling 60 are interlocked with the opening / closing of the opening / closing portion 43 has been described. The member 45 may be operated. Also in this case, the positioning or release of the bearing 112 and the connection or disconnection of the drive side shaft coupling 60 are performed in conjunction with each other.

  In the embodiment, the drive side shaft joint contact portion 452 is provided on the front side and the back side of the drive side shaft joint 60, but the drive side shaft joint contact portion is provided on either the front side or the back side. 452 may be provided.

  In the embodiment, the example in which the spring 74 pushes the drive side shaft joint 60 toward the rotary shaft side shaft joint 50 has been shown. However, the spring 74 pulls the drive side shaft joint 60 back in the direction away from the rotary shaft side shaft joint 50. It may be. In this case, the drive side shaft joint contact portion 452 is configured to contact the flange 64 from the opposite side of the rotary shaft side shaft joint 50. In other words, in this configuration, when the contact member 45 is located at the first position, the drive side shaft joint 60 is pushed out toward the rotary shaft side shaft joint 50 by the drive side shaft joint contact portion 452, and the contact member 45. Is moved in the second direction from the first position, the drive side shaft coupling 60 is pulled back away from the rotary shaft side shaft coupling 50 by the spring 74.

DESCRIPTION OF SYMBOLS 100 ... Image forming apparatus, 1 ... Control part, 11 ... Photoconductor, 111 ... Rotating shaft, 112 ... Bearing, 12 ... Charging part, 13 ... Writing part, 14 ... Developing part, 15 ... Transfer part, 16 ... Fixing part , 31... Medium accommodating section, 34... Transport path, 35... Discharge section, 40... Casing, 41 A. support mechanism, 41 B. support mechanism, 42 ... bearing support section, 421. , 423 ... Bearing guide part, 43 ... Opening / closing part, 431 ... Hinge, 432 ... Hinge, 44 ... Link mechanism, 441 ... First link member, 441a ... Pin, 442 ... Second link member, 442a ... Guide hole, 442b ... guide hole, 442c ... guide hole, 444 ... support, 45 ... contact member, 451 ... bearing contact portion, 452 ... drive side shaft joint contact portion, 454 ... addition member, 455 ... pin, 456 ... spring, 46 ... guide portion 50 ... Rotating shaft Shaft coupling 51 ... first recess 52 ... second recess 53 ... key groove 60 ... drive side shaft coupling 61 ... main body 62 ... first key 63 ... second key 64 ... flange 65 ... first 3 recesses, 70 ... motor, 71 ... rotor, 72 ... stator, 73 ... 4th recess, 74 ... spring

Claims (5)

A bearing support that supports the bearing and is open so that the bearing is removed in a first direction intersecting a rotational axis supported by the bearing;
A drive-side shaft joint that transmits a driving force to the rotary shaft by being connected to a rotary shaft-side shaft joint provided at one end of the rotary shaft;
A contact member having a bearing contact portion in contact with the bearing ;
Extruding means for connecting the drive side shaft joint to the rotary shaft side shaft joint by pushing the drive side shaft joint toward the rotary shaft side shaft joint while being connected to a drive source;
A drive-side shaft coupling contact portion that is provided on the contact member and contacts the drive-side shaft coupling ;
The bearing contact portion contacts the bearing so as to restrict movement of the bearing in the first direction when the contact member is positioned at the first position, and the contact member is in the first position. Is moved away from the bearing so as not to restrict movement of the bearing in the first direction when moved in a second direction intersecting the rotation axis from the position of
When the contact member is located at the first position, the drive side shaft joint is pushed toward the rotation shaft side shaft joint by the pushing means so as to be connected to the rotation shaft side shaft joint. When the contact member moves from the first position in the second direction, the support member is pulled back by the drive side shaft joint contact portion so as to be separated from the rotary shaft side shaft joint . A housing that houses the support mechanism and a rotating body having the rotating shaft;
An opening / closing part provided so that one surface of the housing is opened and closed;
The contact member is positioned at the first position when the opening / closing part is closed, and the contact member is moved from the first position to the second direction when the opening / closing part is opened. The support mechanism according to claim 1, further comprising a link mechanism. A flange is provided on the outer peripheral surface of the drive side shaft coupling,
The drive side shaft joint contact portion contacts the flange from the rotary shaft side shaft joint side, and moves away from the rotary shaft side shaft joint as the contact member moves in the second direction. as it pulls back the shaft coupling, mounting arrangement according to claim 1 or 2, characterized in that provided by inclined with respect to the second direction. The bearing support portion supports the bearing by contacting the outer peripheral surface of the bearing at two locations in the circumferential direction of the bearing,
The bearing contact portion of claim 1 to 3, characterized in that for regulating the movement in the first direction of the bearing by contact with the outer peripheral surface of the bearing at one location in the circumferential direction of the bearing The support mechanism according to any one of the above. A support mechanism according to any one of claims 1 to 4 ,
A drive source for transmitting a drive force to the drive side shaft coupling;
An image carrier,
A bearing that supports the rotation shaft of the image carrier and is supported by the bearing support;
A rotary shaft side shaft joint provided at one end of the rotary shaft;
Image forming means for forming an image on the image carrier;
An image forming apparatus comprising: transfer means for transferring an image formed on the image carrier to a recording medium.

Images