JPH0369824A - Bearing device - Google Patents

Abstract

PURPOSE:To facilitate assembling of a bearing device supporting a rotary body with reduced manufacturing cost by fitting bearings, respectively, into cutouts of plate members of a bearing supporting member formed in one body while pressing one of bearings supporting a shaft integral with the rotary body inward ly in the axial direction. CONSTITUTION:For the purpose of assembling a hearing device, after a wave washer 308, a middle member 309, and bearings 303a, 303b are attached to a shaft 305, bearings 303a, 303b are, respectively, fitted to cutouts 302a, 302b of plate members 301a, 301b while the bearing 303b is abutted against a stepped part 307b of the shaft 305 for pressing the bearing 303a in the pulley direction. After fitted, the bearings 303a, 303b are pressed to the plate members 301a, 301b by elastic force of the wave washer 308, and therefore the respective bearings 303a, 303b never break away from the cutouts 302a, 302b.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a bearing device that rotatably supports pulleys, gears, etc. The present invention relates to a bearing device suitable for use in a transmission system.

[Conventional technology]

Heat-developable photosensitive materials are well-known as image-discipline materials, and for information on heat-developable photosensitive materials and their processes, for example, see 24 of Basic Non-Silver Salt Photography Edition of Photographic Engineering (published by Corona Publishing, 1982).
Pages 2 to 255, video information published in April 1978, page 40,
Neblett Handbook of Photography
And Reprograph E (Neblett's
Handbook of Photography
and Reprography) 7th edition (7th
Ed, ) 7y Van No5trand Reinhold Company (Van No5trand Re1nhol
d Company), pages 32-33.

In addition, regarding the method of obtaining a color image by heat development, a movable dye is released in an image form by heating, and this movable dye is transferred to a dye fixing material (an image receiving material) having a mordant using a solvent such as water. ), transfer to a dye fixing material using a high boiling point organic solvent, transfer to a dye fixing material using a hydrophilic thermal solvent built into the dye fixing material, and methods in which mobile dyes are thermally diffusible or sublimable. A method of transferring the dye to a dye-receiving material such as a support has been proposed.

As an apparatus for carrying out this type of image forming method, for example, as disclosed in Japanese Patent Laid-Open No. 59-75247, an exposure head is used in an exposure section to expose a color image onto a heat-developable photosensitive material. Afterwards, an image-forming solvent such as water is applied to the heat-developable photosensitive material using a roller, and this is sent to a heat development section.The image-receiving material is brought into close contact with the heat-developable photosensitive material after heat development, and then sent to the transfer section. 2. Description of the Related Art Image forming apparatuses have been proposed in which an image is thermally transferred to an image receiving material in a transfer section.

The exposure head is fixed, for example, to a belt movable along the axial direction of the photosensitive material support drum, and scanning exposure is performed on the photosensitive material supported by the drum by rotation of the photosensitive material support drum and movement of the belt.

The belt is stretched along the axial direction of the drum, and the exposure head can be moved by driving the belt.

[Problems to be Solved by the Invention] The above-mentioned belt is stretched over a pair of boobs, for example, but
If the pulley installation accuracy is low, the belt will not move in the proper area, and therefore the exposure head will not move accurately, making it impossible to perform accurate exposure. In order to rotatably support the pulley, a shaft may be fixed to the pulley and both ends of the shaft may be rotatably supported by bearings.

In order to fix the position of the pulley relative to the drum, each bearing is supported and fixed to the housing of the exposure section using a bearing support member, but installation accuracy decreases due to installation errors of each bearing, and as a result, The pulley does not rotate in the correct direction,
Accurate exposure cannot be performed.

Further, in a configuration in which each bearing is supported by a bearing support member, it is difficult to assemble the pulley.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to provide a bearing device that is easy to assemble and allows the bearing to be assembled with high precision.

[Means and Effects for Solving the Problems] The above object of the present invention is to provide a bearing support member in which a pair of opposing plates having substantially U-shaped notches are integrally bottomed, and a bearing support member that is fitted into the notches of the plates. a bearing whose movement in the direction of the shaft end is regulated by the rotation, and a shaft which is provided integrally with the rotating body, fits into the bearing, and is locked to one of the bearings, and whose movement in one direction in the axial direction is regulated. and an elastic member provided between the rotating body and the other bearing and urging the other bearing against the plate material.

In other words, the rotating body is supported by fitting each bearing into a notch in each plate of the integrally molded bearing support member while pressing one of the bearings that supports the shaft integrated with the rotating body in the axial direction. The bearing device is easy to assemble. Further, each bearing is restricted from moving toward the shaft end, and the shaft of the rotating body is restricted from moving toward the shaft end by one bearing, and an elastic member is provided between the other bearing and the rotating body. So the axial movement of the rotating body is limited and high precision rotation can be guaranteed. In addition, since the bearing support member has an integral bottom shape,
The bearing mounting position can be molded with high precision.

In the present invention, the rotating body that is supported by a bearing and rotates includes drive transmission means such as a pulley, a reel, and a gear. When these are rotatably supported by the configuration of the present invention, the rotating body rotates at a fixed position in the axial direction, and assembly is also easy.

Furthermore, by applying the configuration of the present invention to the drive system of the scanning exposure means of the image forming apparatus, the locus of the scanning exposure means becomes constant and accurate exposure can be performed.

[Embodiment]

Hereinafter, one embodiment of the present invention will be described in detail based on the accompanying drawings.

FIG. 1 is an exploded perspective view of a bearing device according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the bearing device along the axial direction.

The bearing support member 300 includes a pair of opposing plates 30Ia, 3
01b, and these are integrally molded. Each plate material 301a, 301b has a substantially U-shaped notch 302a.
, 302b are formed, and these notches 302a, 30
Bearing 303a on 2b.

303b is fitted and fixed. The pulley 304 has a shaft 3
05 is fixed, and both ends of the shaft 305 are fitted with bearings 303a.
, 303b.

The bearings 303a and 303b have a large diameter portion 306a inward in the axial direction.
, 306b, and after fitting into the notches 302a, 302b, movement in the axial end direction is restricted.

The shaft 305 has a bearing fitting part having a smaller diameter than the pulley fixing part, and step parts 307a and 307b are formed, and one step part 307b is larger diameter part 306b of one bearing 303b.
It is locked to restrict movement in one direction. Other bearing 3
Between the pulley 304 and the pulley 304 is a wave washer 30 on a flat disk having a hole into which the large diameter portion of the shaft 305 loosely fits.
8 and an intermediate member 309 are provided, and the wave washer 3
Due to the elastic force of 08, the other bearing 303a is attached to the plate 301a.
is energized by

Note that the urging force by the wave washer 308 is applied to the bearing 30.
The intermediate member 309 has a diameter approximately equal to that of the wave washer 308 on the side that contacts the wave washer 308 so that it acts only on the inner race 310 of the bearing 3a.
The side in contact with 03a has approximately the same diameter as the inner race 310.

The position of the pulley 304 between the plates 301a and 301b is such that one stepped portion 30 is locked to one bearing 301b.
It is determined by the position of 7b. And the other bearing 30
3a is the wave washer 30 attached to the fitted plate 301a.
8, the position of the pulley 304 is fixed.

To assemble this bearing device, a wave washer 30
8. Intermediate member 309, bearings 303a, 303b attached to shaft 30
5, each bearing 303a, 303b is inserted into the notches 302a, 302b of the plate materials 301a, 301b while one bearing 303b is brought into contact with the stepped portion 307b of the shaft 305 and the other bearing 303a is urged toward the pulley. to fit. After fitting, the bearings 303a, 303b are urged against the plate members 301a, 301b by the elastic force of the wave washer 308, and each bearing 303a, 303b has the notch 302a,
It will never leave 302b.

The reference plate side of the bearing support member 300, that is, the shaft 305
A hole 311 through which a screw is inserted or screwed is formed at the bottom of the side where one stepped portion 307b is locked to the bearing 303b, and the bearing support member 300 is equipped with a pulley 304, bearings 303a, 303b, etc. is fixed by a screw that threads into a screw hole provided in a predetermined mounting portion. Further, a long hole 312 into which a screw is inserted is formed at the bottom of the other plate 301a side of the bearing support member 300, and the bearing support member 300 has a long hole 312 that is inserted into a screw hole provided in a predetermined mounting portion. Fixed by The mounting precision of the bearing support member 300 to the mounting portion is guaranteed by increasing the positional precision of the hole 311.

Note that if the wave washer 308 has a shape that contacts only the inner race 310 of the bearing 303a, the intermediate member 309 may be omitted.

Furthermore, instead of the wave washer 308, other elastic means such as a coil spring may be provided.

FIG. 3 is a schematic configuration diagram of the image forming apparatus.

A magazine 14 is disposed on the machine base 12 of the image forming apparatus 10, and a roll-shaped photothermographic material 16 is housed within the magazine 14.

The heat-developable photosensitive material 16 is pulled out from its outer periphery, cut into a predetermined length by a cutter 18, and then wound around the outer periphery of a rotating drum 20 in the six directions of arrows.

An exposure radar 22 is arranged corresponding to the outer periphery of the rotating drum 20, and the rotating drum 20 is rotated at high speed to expose an image onto the wound photothermographic material 16.

After exposure, the photothermographic material 16 is transferred by rotating the rotating drum 20 in reverse (
direction of arrow B), the scraper 24 rotates the rotating drum 20.
The sheet is peeled off from the substrate and further conveyed by a pair of conveying rollers 25 and 27.

A water application section 26 is provided between the pair of conveyance rollers 25 and the pair of conveyance rollers 27 on the conveyance path of the photothermographic material 16 . A coating roller 64 rotated by an AC motor (not shown) is disposed in the water coating section 26, and the photothermographic material 16 is transferred to the coating roller 64 while being conveyed.
Water is applied as an image-forming solvent by contacting with.

The heat-developable photosensitive material 16 to which water has been applied is transferred to the heat-developable transfer section 28
It is now being sent to.

In the thermal development transfer section 28, a heating drum 34 and an endless pressure belt 36 serving as pressure contact means are arranged. Further, a halogen lamp 38 is disposed inside the heating drum 34, and the outer peripheral surface of the heating drum 34 is heated to about 90° C. by the halogen lamp 38.

The endless crimping belt 36 is wrapped around rollers 37, 39, 41.
．． 43, and its endless outer side is pressed against the outer peripheral surface of the heating drum 34. The winding roller 37 is rotated by a step motor (not shown), and in conjunction with this, the endless pressure belt 36 and the heating drum 3 are rotated.
The heat-developable photosensitive material 16 is sandwiched and conveyed between the photothermographic material 4 and the heat-developable photosensitive material 16 to be thermally developed.

A rubber bonding roller 48 is placed in the vicinity of the portion where the endless pressure belt 36 is wound around the roller 37 so as to be pressed against and in contact with the outer peripheral surface of the heating drum 34 .

The image-receiving material 32 sent to the thermal development transfer section 28 is moved by a bonding roller 48 disposed in contact with the outer circumferential surface of the heating drum 34 (between the bonding roller 48 and the outer circumferential surface of the heating drum 34). ) Heat-developable photosensitive material 16
The heating drum 34 and the endless pressure belt 3
It is designed to be supplied between 6 and 6.

When the heat-developable photosensitive material 16 is heated while being transported while bonded to the image-receiving material 32 in the heat-developable transfer section 28, it is thermally developed and the image is transferred to the image-receiving material 32. It is now possible to obtain it.

A peeling plate 49 is arranged on the side of the thermal development transfer section 28 . The peeling plate 49 has a distal end close to the outer circumferential surface of the heating drum 34, moves together with the heating drum 34, engages with the photothermographic material 16 located inside, and receives the image of the photothermographic material 16. The material 32 is peeled off from the outer periphery of the heating drum 34.

A pair of separation rollers 50 are disposed below the peeling plate 49 and correspond only to both ends of the image receiving material 32 in the width direction.
Furthermore, a conveyor belt 52 is wound around the separation roller 50. This conveyor belt 52 engages only at both ends of the image receiving material 32 in the width direction, and transfers the image receiving material 32 to the photothermographic material 1.
6 and is bent and transported.

The separated image-receiving material 32 is dried by a heater 54 and then sent onto a take-out tray 56 formed at the top of the machine stand 12.

On the other hand, the separated photothermographic material 16 is conveyed by a pair of conveying rollers 58 and sent to a waste photosensitive material storage box 59.

FIG. 4 is a schematic diagram showing the state in which the exposure head 22 is mounted.

A guide bar 201 passes through the base of the exposure head 22,
Furthermore, it is fixed to a belt 200 stretched between a pair of pulleys 304, and is moved along the axial direction of the rotating drum 20 by rotation of either one of the IJs 304.

Each pulley 304 is fixed to the exposure unit side wall 202 by a bearing device configured as described above, and its position relative to the rotating drum 20 is fixed. The bearing support member 300 that supports the bearing 303 of the pulley 304 is fixed with its bottoms facing each other and the notches 302 opening in opposite directions. And belt 200
When the belt 200 is stretched around the pulley 304, the bearing 303 fitted in the notch 302 is urged toward the deepest part of the notch 302, and the bearing 303 does not move or come off within the notch 302, and the belt 200 Accurate rotation is guaranteed.

Therefore, the exposure head 22 fixed to the belt 200 can move appropriately in the axial direction (sub-scanning direction) of the rotating drum 20, and the photosensitive material 16 supported by the rotating drum 20 can be exposed accurately.

〔Effect of the invention〕

According to the present invention, by fitting each bearing into the notch of each plate of the integrally molded bearing support member while pressing one of the bearings that supports the shaft integral with the rotating body in the axial direction,
It is easy to assemble the bearing device that supports the rotating body. Further, each bearing is restricted from moving toward the shaft end, and the shaft of the rotating body is restricted from moving toward the shaft end by one bearing, and an elastic member is provided between the other bearing and the rotating body. Therefore, the axial movement of the rotating body is restricted, ensuring high precision rotation and preventing the bearing from coming off. Further, since the bearing support member is integrally molded, the bearing mounting position can be molded with high precision, and manufacturing costs can be reduced.

Furthermore, by applying the configuration of the present invention to the drive system of the scanning exposure means of the image forming apparatus, the locus of the scanning exposure means becomes constant and accurate exposure can be performed.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of the bearing device, FIG. 2 is a cross-sectional view of the bearing device, FIG. 3 is a schematic configuration diagram of the image forming apparatus, and FIG. 4 is a diagram showing the installation state of the exposure head. Reference numerals in the figure: 10 - Image forming device 16 Heat-developable photosensitive material 28 - Heat-developable transfer section 32 Image-receiving material 34 Heating drum 36 Endless pressure belt 48 Bonding roller 49 Peeling plate 50 Separating roller 57 Guide 200...Belt 201 Guide bar 30〇 - Bearing support member 301 - Plate material 303, - Bearing 305 Shaft 307 Step part 308 - Wave washer 309 Intermediate member 310 Inner race 311 - Hole 31 02 302 Notch 304 Pulley 306 Large diameter part 52 Separation belt 58 Conveyance roller pair side wall Long hole Figure 1 Figure 2 Figure

Claims (1)

[Claims] A bearing support member integrally formed with a pair of opposing plates having substantially U-shaped notches, a bearing that fits into the notches of the plates to restrict movement in the direction of the shaft end, and a rotating body integrally formed with the bearing support member. A shaft is provided between the rotary body and the other bearing, and a shaft is provided to fit into the bearing and is locked by one of the bearings to restrict movement in one direction in the axial direction, and the rotating body and the other bearing. Bearing device including an elastic member that biases a plate material