JP4947696B2 - Rotating shaft support device - Google Patents

Description

  The present invention relates to a rotating shaft support device configured to attach a bearing member of a rotating shaft to a holding member of an apparatus apparatus main body.

  2. Description of the Related Art Conventionally, a rotating shaft support device having a configuration in which a bearing member that rotatably supports a rotating shaft is fixedly attached to a holding member of a device main body has been widely adopted in a wide variety of apparatus devices. In such a rotary shaft support device, for example, as shown in FIG. 22 showing the disclosure of Patent Document 1 below, both end portions in the axial direction of the long rotary shaft 1 have a substantially hollow cylindrical shape. The bearing members 2 and 2 are rotatably supported, and each of the bearing members 2 is formed through the holding plates 3 and 3 provided on the apparatus main body side as shown in FIG. It is attached by being inserted through the inside of the support holes 3a, 3a.

  Each of the bearing members 2 described above has a main body barrel portion 2b having a shaft hole portion 2a into which the rotary shaft 1 is inserted, and an outer circumferential surface of the main body barrel portion 2b has an axial direction and a rotational direction. A pair of sandwiching protrusions 2c, 2c are provided so as to protrude from each other. Then, after the main body body 2b is inserted in the axial direction toward the inside of the support hole 3a of the holding plate 3 as indicated by an arrow e in FIG. 23, the body body 2b is rotated as indicated by an arrow f in FIG. When moved, the holding plate 3 is sandwiched in the thickness direction between the above-described pair of sandwiching projections 2c, 2c in the axial direction, whereby the bearing member 2 is as shown in FIGS. Fixed in the axial direction. At the same time, a fixing pin 2d disposed at a position projecting radially outward from the outer peripheral surface of the main body body 2b of the bearing member 2 is fitted into the fixing hole 3b of the holding plate 3, whereby the bearing The member 2 is configured to be fixed in the rotational direction.

  As shown in FIG. 27, the shaft end portion of the rotating shaft 1 is slid in the axial direction as indicated by the arrow g with respect to the bearing member 2 attached to the holding plate 3 in this way. Thus, the shaft end portion of the rotary shaft 1 is rotatably supported by the bearing member 2.

  However, for example, as shown in FIG. 28, when the bearing mounting portion 1 a is provided at a substantially central position in the axial direction other than the shaft end portion of the rotating shaft 1 described above, or attached to the rotating shaft 1. When the bearing mounting portion 1a is disposed in the vicinity of the large-diameter driving roller 4, the driving roller 4 and other members provided on the rotating shaft 1 obstruct the rotating shaft 1 in the axial direction. It may not be possible to mount the bearing member 2 by sliding it.

  Furthermore, for example, as shown in FIG. 29, when the roller member 5 for paper conveyance is pressed against the driving roller 4 attached to the rotating shaft 1 by the urging force from the spring member 6 or the like. In this case, the rotating shaft 1 bends due to the pressure contact force of the roller member 5, and the contact relationship between the driving roller 4 and the roller member 5 is biased, which is a cause of the so-called skewing phenomenon of the paper. May be.

JP-A-2000-136823

  Therefore, the present invention enables the bearing member to be easily attached to a position other than the shaft end portion of the rotating shaft, and can be efficiently attached to the apparatus equipment main body side within a small space. An object of the present invention is to provide a rotating shaft support device.

In order to achieve the above object, in the rotating shaft support device according to the present invention, the rotating shaft, a roller provided at an intermediate portion different from the shaft end portion of the rotating shaft, the intermediate portion of the rotating shaft, and the roller A shaft support member that rotatably supports the rotating shaft at a predetermined position on the side of the shaft, and the rotation is performed by a bearing fracture portion that is cut out so as to separate a part of the peripheral wall portion of the hollow cylindrical body in the circumferential direction. A bearing member comprising: a main body barrel portion formed with a notch opening for enabling insertion of the shaft in a direction substantially perpendicular to the axial direction; and a lever portion provided integrally with the main body barrel portion; and the bearing member Is provided with a bearing fitting portion in which a notch opening is formed so as to be inserted in a direction substantially perpendicular to the axial direction, and a holding member that holds the bearing member that supports the rotating shaft by the bearing fitting portion. And the body trunk is elastically deformed The opening width (Z) of the notch opening formed in the body body is smaller than the outer diameter dimension (Y) of the rotating shaft (Z <Y), and the bearing fitting The opening width (X) of the notch opening formed in the part is formed to be smaller than the maximum outer diameter dimension (φV) of the main body trunk part and larger than the minimum outer diameter dimension (W) of the main body trunk part ( W <X <φV), and the lever portion further includes an engaging portion for fixing the bearing member to the holding member, and the holding member extends from the notch opening of the bearing fitting portion to the main body. A position in which the body portion is inserted into the bearing fitting portion, and the minimum external dimension (W) of the body body portion faces the opening width (X) of the notch opening of the bearing fitting portion. The bearing member is engaged with the engagement portion at a position where the bearing member is rotated by a predetermined amount in the rotation direction from the facing state. It has been made to the structure having a fixing portion for fixing the bearing member.

  According to the rotating shaft support device having such a configuration, the intermediate portion of the rotating shaft in the axial direction is attached to the bearing member so as to be pushed in a direction substantially orthogonal to the axial direction through the bearing fracture portion provided in the bearing member. The bearing member to which the rotating shaft is attached is attached so as to be pushed into a bearing fitting portion provided in the holding member in a direction substantially orthogonal to the axial direction.

  As described above, the rotating shaft support device according to the present invention is configured so that the rotating shaft is pushed in a direction substantially perpendicular to the axial direction through a bearing fracture portion formed by cutting out a part of the bearing member. The bearing member having the rotating shaft mounted thereon is clamped by being pushed in a direction substantially perpendicular to the axial direction into a bearing fitting portion formed by cutting out a part of the holding member. Therefore, it is possible to reduce the bending generated in the rotating shaft by easily mounting the bearing member at a position other than the shaft end of the rotating shaft, and to support the rotating shaft support device. Can be efficiently attached in a small space to the apparatus main body, and productivity can be improved while improving the reliability of the rotary shaft support device.

  Hereinafter, an embodiment in which the present invention is applied to a rotating shaft support device of a copying machine will be described in detail with reference to the drawings. First, as shown in FIG. 1, the entire copying machine as an image forming apparatus is shown. The structure will be explained.

  The copying machine 10 shown in FIG. 1 includes a printer unit (apparatus body unit) 11 that performs an image forming operation on a recording sheet P, and an image reading device 12 that is installed above the printer unit 11. And an automatic document feeder (ADF) 13 that automatically supplies a document to the image reading device 12.

  Then, the image information of the document read by the image reading device 12 is supplied to the laser beam scanner 112 as an image signal by being input to the controller 111 disposed in the printer unit (device main body unit) 11, and The scanning beam emitted from the laser beam scanner 112 is irradiated to the photosensitive drum 114 that is uniformly charged in advance by the primary charger 113 while being driven to rotate in the direction of the arrow shown in the figure, and the surface of the photosensitive drum 114 is charged with an electrostatic latent image. An image is formed. The electrostatic latent image formed on the surface of the photosensitive drum 114 becomes a toner image developed by attaching toner as a developer when passing through the developing device 115.

  On the other hand, in the sheet supply cassette 116 disposed below the photosensitive drum 114, a large number of recording sheets P as recording materials are stored so as to be stacked on the intermediate plate 116a. The recording sheet P sent out from the sheet supply cassette 116 by the rotational drive of the roller 116b is delivered to the conveying roller pair 116c and sent to the registration roller pair 116d.

  The registration roller pair 116d is arranged to receive the leading end of the recording sheet P in a state where the rotation is stopped, and corrects the skew of the recording sheet P by forming an appropriate deflection on the recording sheet P. And make it straight. Thereafter, when the rotation of the registration roller pair 116d is started in synchronism with the rotation of the photosensitive drum 114, the recording sheet P is adjusted so that the leading end thereof is aligned with the toner image on the photosensitive drum 114. The recording sheet P is fed into a transfer region between the transfer unit 114a and the photosensitive drum 114, and the recording sheet P is charged by a transfer bias applied from the transfer unit 114a, so that the toner image on the photosensitive drum 114 side is changed to a recording sheet. Transferred to P.

  The conveying belt 117 extending from the transfer area toward the rear side (the left side in the drawing) is arranged so as to send the recording sheet P on which the toner image is transferred to the fixing device 118 as described above. The fixing device 118 is provided with a fixing film 118a constituting a heating body, and the pressure roller 118b is pressed against the lower surface side of the fixing film 118a in the figure by an appropriate biasing means such as a spring. The recording sheet P is passed through the fixing nip region formed at the press contact portion between the fixing film (heating body) 118a and the pressure roller 118b, and the heating / heating applied in the fixing nip region is arranged. The fixing process for the toner image on the recording sheet P is performed by the pressure action.

  Further, the recording sheet P on which a permanent image is formed by the fixing action is discharged onto a discharge tray 119 having a blade plate shape, but the toner remaining on the surface of the photosensitive drum 114 after fixing is the cleaner 114b. The residual toner is removed by scraping action.

  For example, a rotating shaft support device according to an embodiment of the present invention as shown in FIGS. 2 and 3 is employed in the conveyance path of such a copying machine.

  That is, for example, a plate-shaped paper guide member 20 as shown in FIGS. 2 and 3 is arranged in the conveyance path of the recording sheet P described above, and on the paper conveyance surface of the paper guide member 20. A large number of paper passing ribs 21 extending in the paper conveying direction from the lower side to the upper side in the figure are arranged in a state of being erected substantially in parallel. Each of the sheet passing ribs 21 is provided so as to have a conveyance guide function for the recording sheet P, and some of the plurality of sheet passing ribs 21 are in the form of a long bar. The bearing member 23 is configured to be a holding member for the pair of bearing members 23 and 23 that rotatably support the rotary shaft 22 and is arranged with respect to the pair of paper passing ribs 21 that are arranged at an appropriate interval in the paper width direction. Are attached to each. The mounting structure of the bearing member 23 will be described in detail later.

  As shown in FIG. 4, the bearing members 23, 23 are respectively bearing support portions formed at one end portion in the axial direction (left end portion in FIG. 4) and the substantially central portion in the axial direction of the rotating shaft 22. Respectively large rubber rollers 24 and 24 fixed to the rotary shaft 22 are arranged in the vicinity of the side portions of the bearing members 23 and 23, respectively. Yes. In addition, the rotation auxiliary shaft 22c is connected to the other end portion (the right end portion in FIG. 4) of the rotation shaft 22 via a convex portion 22b provided at the other end portion, and the rotation auxiliary shaft 22c A driving gear 22d that is rotationally driven by a driving device on the apparatus main body side is connected to the tip portion, so that a rotational driving force for paper conveyance is transmitted to the rotary shaft 22.

  Further, each of the bearing members 23 described above has a main body barrel portion 23a having a shape in which a hollow cylindrical body is partially cut away, as shown in FIG. That is, the main body barrel portion 23a of the bearing member 23 is provided with a bearing fracture portion 23b that is notched so as to separate a part of the peripheral wall portion of the main body barrel portion 23a in the circumferential direction. The breaking portion 23b is provided so as to form a notch opening extending substantially linearly along the axial direction. The notch opening formed by the bearing fracture portion 23b of the bearing member 23 has an appropriate width Z along the tangential direction of the main body trunk portion 23a, and the notch opening width Z corresponds to the bearing member 23. It is formed so as to be substantially constant over the entire length in the axial direction.

  Further, by providing such a bearing fracture portion 23b in the bearing member 23, the main body barrel portion 23a of the bearing member 23 is configured to be elastically deformable in the radial direction, which is shown in FIG. As described above, the bearing support portions 22a and 22a of the rotary shaft 22 described above are mounted on the bearing inner side of the bearing member 23 so as to be pushed through the bearing fracture portion 23b in the direction of the arrow a substantially orthogonal to the axial direction. It has become so.

  At this time, the notch opening width Z formed by the bearing fracture portion 23b is formed to be smaller than the outer diameter Y (see FIG. 14) of the bearing support portion 22a of the rotary shaft 22 described above (see FIG. 14). Z <Y), whereby when the outer peripheral surface of the rotary shaft 22 is pressed against the bearing fracture portion 23b of the bearing member 23 (see arrow a in FIGS. 6 and 14), the bearing is supported by the outer peripheral surface of the rotary shaft 22. The bearing fracture portion 23b of the member 23 is elastically deformed so as to be once expanded in the width direction (see arrow b in FIG. 14), whereby the rotary shaft 22 can be mounted on the bearing inner side of the bearing member 23. Further, after the rotary shaft 22 is mounted, the main body body portion 23a of the bearing member 23 is elastically returned to its original shape, whereby the rotary shaft 22 is held without coming out of the bearing member 23. It has become so.

  On the outer peripheral surface of the main body body portion 23a of the bearing member 23, a pair of sandwiching convex portions 23c and 23c are spaced apart in both the axial direction and the rotational direction, similar to the one disclosed in the prior art described above. A bearing fitting portion (see reference numeral 25 in FIGS. 7 to 21) provided as a holding member on the paper passing rib 21 between the pair of sandwiching convex portions 23c and 23c is provided with a thickness. The bearing member 23 is fixed in the axial direction. Further, a convex fixing pin 23e is formed so as to protrude in the axial direction at the distal end portion of the lever member 23d protruding outward in the radial direction from the outer peripheral surface of the main body barrel portion 23a. When the pin 23e is fitted in a bearing fixing hole (see reference numeral 251b in FIGS. 7 to 21) of a bearing fitting portion provided as a holding member on the paper passing rib 21, the bearing member 23 rotates. It is designed to be fixed in the direction. The fitting relationship between these members will be described in detail below.

  First, as shown in FIG. 7 in particular, contact / interference between the rotating shaft 22 and the rubber rollers 24 and 24 is avoided in each of the paper passing ribs 21 located at the portion where the rotating shaft 22 is disposed. Therefore, the necessary concave relief portion 21a is formed so as to have a substantially semicircular cutout shape, and each of the paper passing ribs 21 located at the portion to which the above-described bearing member 23 is attached is provided with a bearing member 23. The bearing fitting portion 25 that can be clamped is formed so as to have a substantially semicircular cutout shape, and the main body barrel portion 23a of the bearing member 23 described above is formed in the cutout shape of the bearing fitting portion 25. The bearing member 23 is fixed in a non-moving state.

  As shown in FIGS. 7 to 13, the bearing fitting portion 25 provided on the paper passing rib 21 as a member for holding the bearing member 23 is integrated with the paper passing rib 21 itself. The first bearing fitting member 251 and the second bearing fitting member 252 disposed adjacent to the first bearing fitting member 251 in the axial direction (paper width direction). In this way, the bearing fitting portion 25 is configured by dividing it into two members by setting the die-cutting directions of the first and second bearing fitting members 251 and 252 made of molded products in different directions. This is in order to enable die-cutting in one direction in the mold structure used when manufacturing the bearing fitting portion 25 described above, and if possible by another manufacturing method, the bearing fitting portion 25 is made one member. You may make it comprise.

  As shown in FIGS. 8 to 11, the first bearing fitting member 251 constituting the bearing fitting portion 25 described above receives the body body portion 23 a of the bearing member 23 from the front side. A substantially U-shaped notch holding groove 251a is provided, and the body 23a of the bearing member 23 is directed toward the groove rear side of the notch holding groove 251a through the opening of the notch holding groove 251a. It is designed to be inserted. The inner diameter of the arcuate portion on the back side of the notch holding groove 251a is formed so as to be substantially the same as the maximum outer diameter φV (see FIGS. 14 and 19) of the main body barrel 23a of the bearing member 23. Accordingly, the main body body portion 23a of the bearing member 23 is mounted in the groove inside of the notch holding groove 251a of the first bearing fitting member 251.

  Further, the first bearing fitting member 251 is formed with a bearing fixing hole 251b in the upper portion of the above-described notch holding groove 251a so as to be cut out from the rear side, and the bearing fixing hole 251b. On the other hand, the fixing pin 23e on the bearing member 23 side described above is fitted.

  On the other hand, the second bearing fitting member 252 described above is formed from a pair of upper and lower protrusions formed in a substantially bowl shape, as particularly shown in FIGS. 8, 9, 12 and 13. The restriction pieces 252a and 252a are arranged to face each other at an appropriate interval in the vertical direction, and the acute angle protrusions 252b provided at the tip portions of the pair of upper and lower restriction pieces 252a and 252a, The vertical gap between the 252b is configured to form the narrowest part. That is, the vertical gap between the acute angle protrusions 252b and 252b provided on the pair of upper and lower restricting pieces 252a and 252a has a size slightly narrower than the opening of the first bearing fitting member 251 described above. Thus, an opening width X as a whole of the bearing fitting portion 25 configured by superposing these both bearing fitting portions 251 and 252 is configured.

  At this time, as described above, the maximum outer diameter at the portion where the main body 23a of the bearing member 23 is mounted in the notch holding groove 251a of the first bearing fitting member 251 is φV (see FIG. 14 and FIG. 19), in particular, as shown in FIG. 5, FIG. 14 and FIG. 17, the minimum outer diameter W of the body body 23a of the bearing member 23 is the opening of the bearing breakage 23b described above. Is slightly smaller from the both end edges of the body barrel 23a to the outer peripheral surface of the body barrel 23a that is radially opposed to the opening of the bearing fracture 23b. (W <φV). The notch opening width X of the bearing fitting portion 25 (second bearing fitting member 252) described above is slightly larger than the minimum outer diameter W of the main body barrel portion 23a of the bearing member 23a. (W <X).

  As a result, when the main body trunk portion 23a of the bearing member 23 is mounted on the inner side of the bearing fitting portion 25 particularly as indicated by an arrow c in FIG. 17, the minimum outer diameter of the main body trunk portion 23a of the bearing member 23 described above. By disposing W so as to face the notch opening width X of the bearing fitting portion 25 (second bearing fitting member 252), the body body portion 23a of the bearing member 23 is positioned on the bearing fitting portion 25 side. Will be inserted smoothly without interfering with.

  Then, after the main body barrel portion 23a of the bearing member 23 is mounted on the bearing fitting portion 25 in such a non-interference state, the main body barrel portion 23a of the bearing member 23 is removed by the above-described acute protrusions 252b and 252b. The bearing member 23 is held in an immovable state so as not to slip out, and the bearing member 23 is located on the inner side of the bearing fitting portion 25, that is, on the inner side of the notch holding groove 251 a of the first bearing fitting member 251. By being pinched while being pushed in, the bearing member 23 is prevented from coming out outward.

  After the bearing member 23 is smoothly mounted on the inner side of the bearing fitting portion 25 in this way, the lever member 23d described above is rotated as indicated by the arrow d in FIG. Is rotated clockwise in the figure. As a result, as shown in FIG. 19, the outer peripheral surface having the maximum diameter φV of the main body body portion 23 a of the bearing member 23 is the groove inner peripheral surface of the notch holding groove 251 a of the bearing fitting portion 25. The body body 23a of the bearing member 23 is clamped by the inner side of the bearing fitting portion 25 by being pressed.

  Further, when the bearing member 23 is rotated, the fixing pin 23e of the lever member 23d described above is fitted into the bearing fixing hole 251b of the bearing fitting portion 25, whereby the bearing member 23 is rotated in the rotation direction. It is supposed to be fixed.

  The procedure for assembling each member having such a configuration will be described as follows.

  First, as shown in FIGS. 6, 14, and 16, the bearing fracture portion 23 b of the bearing member 23 is pressed against the bearing support portions 22 a and 22 a of the rotary shaft 22 in the direction of arrow a. Then, the bearing member 23 is elastically deformed so as to be expanded in the direction of the arrow b, and the bearing support portion 22a of the rotary shaft 22 is fitted into the bearing of the bearing member 23 and rotated as shown in FIG. The shaft 22 is positioned by the bearing member 23.

  Next, as shown in FIG. 16, the rotary shaft 22 positioned and integrated with the bearing member 23 as described above is assembled to the bearing fitting portion 25 as a holding member. In doing so, first, as shown in FIG. 17, the rotary shaft 22 positioned and integrated with the bearing member 23 described above is inserted in the direction of the arrow c. At this time, the minimum outer diameter W of the bearing member 23 is arranged so as to oppose the notch opening width X of the bearing fitting portion 25 (W <X), whereby the body body portion 23a of the bearing member 23 is fitted to the bearing fitting. It will be smoothly inserted into the inside of the portion 25.

  After the bearing member 23 is inserted into the bearing fitting portion 25 in this manner, the bearing member 23 is rotated in the direction of the arrow d in FIG. 18, and the fixing pin 23e of the bearing member 23 is moved to the position shown in FIG. As shown in FIG. 20, the bearing member 23 is positioned in the rotational direction by being fitted into the bearing fixing hole 251b of the bearing fitting portion 25, and particularly as shown in FIGS. The pinching protrusions 23c and 23c of the bearing member 23 sandwich the sheet passing rib 21 provided with the bearing fitting portion 25 in the plate thickness direction. At that time, since the opening width X of the bearing fitting portion 25 is formed to be smaller than the maximum outer diameter φV of the main body 23a of the bearing member 23 (X <φV), the main body 23a of the bearing member 23 is The bearing member 23 is held in an immobile state without slipping outward, and the bearing member 23 is fixed in the thrust direction.

  As described above, according to the present embodiment, the bearing support portion 22a provided in the middle portion of the rotating shaft 22 is pushed in the direction substantially orthogonal to the axial direction through the bearing fracture portion 23b provided in the bearing member 23. The bearing member 23 mounted on the inside of the bearing member 23 and the rotating shaft 22 is easily and easily pushed into the bearing fitting portion 25 as a holding member in a direction substantially perpendicular to the axial direction. It comes to be attached well.

  The embodiments of the invention made by the present inventor have been specifically described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. Not too long.

  For example, in each of the above-described embodiments, the present invention is applied to the rotary shaft support device provided in the conveyance path of the copying machine, but other parts of the copying machine and other image formation such as a printer are used. The present invention can be similarly applied to devices and a wide variety of devices.

  As described above, the present invention can be widely applied to the rotary shaft support device in various apparatuses including the image forming apparatus.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal cross-sectional explanatory diagram illustrating an overall configuration of a copying machine as an example of an image forming apparatus to which the present invention is applied. FIG. 2 is an explanatory front view showing the entire structure of a guide member having a rotary shaft support device according to an embodiment of the present invention provided in the conveyance path of the copying machine shown in FIG. 1. It is an external appearance perspective explanatory drawing showing the structure of the guide member which has a rotating shaft support apparatus shown by FIG. It is an external appearance perspective explanatory view showing an example of the rotating shaft used for the rotating shaft support apparatus shown by FIG. 3 shows the structure of a bearing member used in the rotating shaft support device shown in FIG. 3, wherein (a) and (b) are external perspective views, (c) are front explanatory views, and (d). ) Is a side view. It is an external appearance perspective explanatory view showing the state at the time of mounting a bearing member concerning one embodiment of the present invention to a rotating shaft. FIG. 3 is an external perspective view illustrating the structure of the guide member shown in FIG. 2. FIG. 3 shows a structure of a bearing fitting portion in an embodiment of the present invention used for a guide member having a rotating shaft support device shown in FIG. 2, wherein (a) and (c) are left and right side surfaces. Explanatory drawing and (b) are front explanatory drawings. It is an external appearance perspective explanatory view showing the structure of the bearing fitting part shown by FIG. It is side surface explanatory drawing showing the structure of the 1st bearing fitting part which comprises the bearing fitting part shown by FIG.8 and FIG.9. It is an external appearance perspective explanatory drawing showing the structure of the 1st bearing fitting part shown by FIG. It is side surface explanatory drawing showing the structure of the 2nd bearing fitting part which comprises the bearing fitting part shown by FIG.8 and FIG.9. It is an external appearance perspective explanatory view showing the structure of the 2nd bearing fitting part shown by FIG. It is a cross-sectional explanatory drawing showing the state at the time of mounting | wearing the rotating shaft with the bearing member concerning one Embodiment of this invention. It is a cross-sectional explanatory drawing showing the state after mounting | wearing the rotating shaft with the bearing member concerning one Embodiment of this invention. It is an appearance perspective explanatory view showing the state where the bearing member concerning one embodiment of the present invention is mounted in the bearing fitting part of a paper guide member. It is a cross-sectional explanatory drawing showing the state which is going to insert the bearing member concerning one Embodiment of this invention in the bearing fitting part of a paper guide member. It is a cross-sectional explanatory drawing showing the state immediately after inserting the bearing member concerning one Embodiment of this invention in the bearing fitting part of a paper guide member. It is a cross-sectional explanatory drawing showing the state which complete | finished mounting | wearing of the bearing member concerning one Embodiment of this invention to the bearing fitting part of a paper guide member. It is the partial enlarged perspective view of the front side showing the state after mounting the bearing member concerning one Embodiment of this invention in the bearing fitting part of a paper guide member. It is the partial expansion perspective view of the back side showing the state after mounting the bearing member concerning one embodiment of the present invention in the bearing fitting part of a paper guide member. It is the partial enlarged perspective view of the back side showing the state which is going to mount | wear a bearing fitting part of a paper guide member in the conventional rotating shaft support apparatus. It is the partial enlarged perspective view of the back side showing the state immediately after mounting the bearing member in the bearing fitting part of the paper guide member in the conventional rotating shaft support device. It is the partial expansion perspective view of the back side showing the state which completed mounting | wearing with the bearing fitting part of the paper guide member in the conventional rotating shaft support apparatus. It is the partial enlarged perspective view of the front side showing the state which complete | finished mounting | wearing with the bearing fitting part of the paper guide member in the conventional rotating shaft support apparatus. It is the partial enlarged perspective view of the back side showing the state which is going to mount | wear with the rotating shaft with respect to a bearing member in the conventional rotating shaft support apparatus. It is the partial enlarged perspective view of the back side showing the state which attached the rotating shaft with respect to the bearing member in the conventional rotating shaft support apparatus. It is external appearance perspective explanatory drawing showing an example of the rotating shaft used for the conventional rotating shaft support apparatus. It is an external appearance perspective explanatory view showing the state where the rotating shaft used for the conventional rotating shaft support device was pressed.

Explanation of symbols

10 Copying machine (image forming device)
11 Printer section (printer section)
12 Image reader 13 Automatic document feeder (ADF)
P recording sheet 114 photoconductor drum 115 developing device 116 sheet supply cassette 117 transport belt 119 discharge tray 20 paper guide member 21 paper feed rib 21a concave relief portion 22 rotating shaft 22a bearing support portion 22b convex portion 23 bearing member 24 rubber roller 22c rotation assist Shaft 22d Drive gear 23a Main body trunk portion 23b Bearing fracture portion 23c Nipping convex portion 23d Lever member 23e Fixing pin 25 Bearing fitting portion 251 First bearing fitting member 251a Notch holding groove 251b Bearing fixing hole 252 Second bearing Fitting member 252a Restriction piece 252b Acute angle protrusion

Claims (5)

A rotation axis;
A roller provided at an intermediate portion different from the shaft end portion of the rotating shaft;
A shaft support member that rotatably supports the rotation shaft at a predetermined position on the intermediate portion of the rotation shaft and on a side portion of the roller, so as to separate a part of the peripheral wall portion of the hollow cylindrical body in the circumferential direction. A main body body portion in which a notch opening for allowing the rotation shaft to be inserted in a direction substantially perpendicular to the axial direction is formed by a bearing fracture portion notched in the lever, and a lever provided integrally with the main body body portion A bearing member comprising a portion;
A bearing fitting portion formed with a notch opening for allowing the bearing member to be inserted in a direction substantially perpendicular to the axial direction, and the bearing member supporting the rotating shaft by the bearing fitting portion; A holding member to hold;
Have
The main body body is elastically deformable, and an opening width (Z) of the notch opening formed in the main body body is smaller than an outer diameter (Y) of the rotating shaft (Z < Y),
An opening width (X) of the notch opening formed in the bearing fitting portion is smaller than a maximum outer diameter size (φV) of the main body barrel portion and a minimum outer diameter size (W) of the main body barrel portion. Larger than (W <X <φV),
Further, the lever portion includes an engaging portion for fixing the bearing member to the holding member, and the holding member is inserted into the body fitting portion from the notch opening of the bearing fitting portion. From the state of being inserted into the joint part and facing the opening width (X) of the notch opening of the bearing fitting part in a positional relationship in which the minimum external dimension (W) of the main body body part faces. A rotating shaft support device comprising: a fixing portion that engages with the engaging portion at a position where the bearing member is rotated by a predetermined amount in a rotating direction to fix the bearing member. The bearing fitting portion is formed by first and second bearing fitting members provided adjacent to each other in the axial direction.
The first bearing fitting member is provided with a substantially U-shaped notch holding groove capable of receiving the bearing member,
The second bearing fitting member is provided with a regulation piece including a convex portion that prevents the bearing member mounted in the notch holding groove of the first bearing fitting member from coming out. The rotating shaft support device according to claim 1.   The first and second bearing fitting members forming the bearing fitting portion are formed of a molded product, and the direction of mold release of the first bearing fitting member and the second bearing fitting member 3. The rotating shaft support device according to claim 2, wherein the direction of punching is set in a different direction. 2. The rotating shaft support according to claim 1, wherein the main body body has a pair of clamping protrusions for clamping the bearing fitting portion in the axial direction and fixing the bearing member in the axial direction. apparatus. 5. The rotating shaft support device according to claim 4, wherein the pair of sandwiching protrusions are provided apart from each other in both the axial direction and the rotation direction .

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