JP2000039695A - Supporting structure for roller shaft - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate assembling and disassembling work, to reduce the number of parts and the number of places to be processed and to make a product inexpensive by forming a lock piece which can abut on a frame body in a shaft length direction at a bearing so that the bearing is regulated to be moved in the shaft length direction. SOLUTION: The bearing 13 is formed at a U-shaped notched groove 4 formed at the edge part of the plate surface part of the frame body 3 so as to be freely engaged and disengaged. When the bearing 13 is inserted in the groove 4 from in a radial direction B and fitted, a projecting piece 4a projectingly formed along the inside circumferential surface of the groove 4 is interposed by two lock pieces 13a and 13b of the bearing 13 so that one piece 13a abuts on the front side of the frame body 3 and the other piece 13b abuts on the rear side of the frame body 3. Therefore, since the pieces 13a and 13b abut on the piece 4a in the shaft length direction A, the bearing 13 is locked to the frame body 3 and regulated to be moved in the shaft length direction. Besides, when the bearing 13 is fitted to the frame body 3, the end surface thereof on a roller body side can abut on the end surface of the roller body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support structure for a roller shaft, and more particularly, to a support structure for a roller shaft that conveys a sheet-like processing target such as a photosensitive material in a photographic processing apparatus. It is about.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 5, a roller shaft 40 of this type has a roller body 40 which comes into frictional contact with a sheet.
Is inserted into bearings 43, 43 detachably attached to holes formed in the frame body 42, and the shaft body 41 is inserted through the bearings 43, 43 at both ends thereof. In general, a structure is supported by 42 so as to be rotatable.

[0003] A bevel gear 44 is inserted into one end of the shaft 41 as an example of driving force transmission.
The rotation of the driving shaft 45 is transmitted to the shaft body 41 by meshing with the bevel gear 46 inserted in the roller body 40, and the sheet in contact with the roller body 40 is roller-conveyed in the apparatus with the rotation of the roller body 40. It is.

Further, the sliding of the shaft body 41 in the axial direction due to the gap between the both end faces of the roller body 40 and the frame body 42 is restricted, and the bearing by pressing the roller body 40 moving in the axial direction. 43
The shaft body is intended to prevent detachment from the frame body 42.
Circumferential grooves are engraved at both ends of 41, for example,
Stop rings 47, 47 made of an E-ring are detachably fitted to the outside.

Accordingly, by positioning the shaft 41 and the roller body 40 with respect to the frame 42 by the retaining rings 47, 47, the sheet can be smoothly and accurately conveyed by the rollers, and the retaining rings 47, 47 are provided. The shaft body 41 can be easily separated in a state where the shaft body 41 is removed from the shaft body 41 and the bearings 43 and 43 are pulled out from the frame body 42, so that the roller body 40 can be easily replaced or the like. .

[0006]

However, in the roller shaft support structure employing the above-mentioned retaining ring 47, the number of parts is increased by the number of retaining rings 47, and the mounting and dismounting of the retaining ring 47 is complicated. In addition, there is a problem that the assembling and disassembling operations of the shaft 41 to the frame 42 are complicated.

Further, circumferential grooves must be formed at both ends of the shaft body 41 in order to fit the retaining ring 47 to the shaft body 41, but it takes time to process the circumferential grooves, and the product cost is reduced. There was a problem of getting worse.

In view of the above, the present invention has been made in view of the above-mentioned problems, and it is possible to easily perform assembling and disassembling operations, and to reduce the number of parts and processing locations, thereby reducing product cost. A first object of the present invention is to provide a support structure for a roller shaft capable of reducing the distance between the roller shaft and the roller shaft without using a retaining ring such as an E-ring. A second object is to provide a supporting structure of the present invention.

[0009]

In order to solve the above problems, a roller shaft supporting structure according to the present invention is configured such that a shaft body 9 having a roller body 10 is rotatably mounted on a frame body 3 via a bearing 13. A support structure for a supported roller shaft, wherein the bearing 13
In order to restrict the movement of the bearing 13 in the axial direction A.
In addition, locking pieces 13a and 13b that can contact the frame 3 in the axial direction A are formed.

According to the roller shaft support structure having the above-described structure, one of the locking pieces 13a of the bearing 13 abuts on the frame 3, so that the movement of the bearing 13 in one direction in the axial direction A can be achieved. In addition to being restricted, the other locking piece 13b of the bearing 13 abuts on the frame 3, thereby restricting the movement of the bearing 13 in the other axial direction A. Therefore, depending on the arrangement of the roller body 10 with respect to the shaft body 9, when the frame body 3 and the end face of the roller body 10 are separated from each other, the shaft body 9 can slide in the bearing 13 in the axial length direction A. However, as the shaft 9 slides,
Even if the roller body 10 that moves in the axial direction contacts the bearing 13, the movement of the bearing 13 in the axial direction A is restricted, and the bearing 13 does not come off the frame 3.

Further, in the roller shaft supporting structure according to the present invention, the roller body 10 is attached to the bearing 13 so as to restrict the movement of the shaft body 9 in the axial length direction A. A configuration that can be abutted can be employed. According to the roller shaft supporting structure according to the second aspect of the present invention, the roller body 10 moves in the axial direction A of the shaft body 9 by abutting against the bearing 13 locked to the frame body 3. Is regulated, and the shaft 9 and the roller 10 are positioned with respect to the frame 3.

Further, in the roller shaft supporting structure according to the present invention, the bearing 13 may be configured to be detachably attached to the frame 3 from the radial direction B as described in claim 3. it can. According to the roller shaft support structure according to the third aspect having the above-described configuration, the bearing is installed at the time of assembly.
The bearing 13 is attached to the frame 3 in the radial direction B, while the bearing 13 is detached from the frame 3 in the radial direction B during disassembly.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below. First, a photosensitive material transport unit in a photographic processing apparatus employing a roller shaft support structure of the present embodiment will be described with reference to FIG. explain.

The photosensitive material transport unit 1 is inserted into a tank 2 for a color developing solution, a fixing solution, and a stabilizing solution in a photographic processing apparatus in order to perform a developing process on the photosensitive material.
2 is a unit for transporting the photosensitive material P within the tank 2 and between the tanks 2.

A plurality of rollers 8,... Arranged at predetermined intervals in the vertical direction are arranged on a frame 3 constituting the appearance of the photosensitive material transporting unit 1, and are arranged so as to be in contact with the respective rollers 8. Sub rollers 17, 17 are provided.

Further, a bevel gear 20 as a transmission means is inserted into one end of the roller 8, and is rotatably supported by the frame 3 so as to be orthogonal to the roller 8 and has a main shaft 21.
A bevel gear 23 that can mesh with the bevel gear 20 is provided on a driving shaft 22 that meshes with the gear.

The sub-roller 17 is configured to rotate in cooperation with the roller 8 by a gear train (not shown).

Therefore, by rotating the main shaft 21,
As the driving shaft 22 rotates, the rollers 8,.
Are rotated in synchronism, and the photosensitive material P is conveyed between the tank 2 and between the tanks through the space between the roller 8 and the sub-roller 17.

The schematic configuration of the photosensitive material transport unit 1 is as described above, and the roller shaft support structure according to the present embodiment will be described below with reference to the drawings.

As shown in FIG. 2, the roller 8 comprises a rod-shaped shaft 9 and a roller 10 mounted concentrically on the shaft 9 and taking care of conveying the photosensitive material P. It is rotatably supported by the frame 3 via bearings 13, 13 which are extrapolated to the ends 9a, 9b and are H-shaped in cross section.

As shown in FIG. 3, the bearing 13 is
In the U-shaped notch groove 4 formed in the edge of the plate surface portion, and the bearing 13 is fitted in the notch groove 4 from the radial direction B and mounted. The two locking pieces 13a and 13b of the bearing 13 sandwich the protruding piece 4a protruding along the inner peripheral surface of the notch groove 4, and one locking piece 13a contacts the front side of the frame 3 and the other. Is brought into contact with the back side of the frame 3.

Therefore, the bearing 13 is locked to the frame 3 by the engagement of the locking pieces 13a, 13b and the protruding piece 4a in the axial direction A, whereby the movement in both axial directions is restricted. You.

When the bearing 13 is mounted on the frame 3, the end face of the bearing 13 on the roller body 10 side can contact the end face of the roller body 10, as shown in FIG. .

Therefore, the roller 8 is formed by bringing the end face of the roller body 10 into contact with the end face of the bearing 13 on the roller body 10 side.
Locked by the bearing 13, the movement in the axial direction A is restricted.

The roller shaft supporting structure according to the present embodiment
As described above, as shown in FIG.
The shaft 9 can be assembled to the frame 3 by a simple procedure of fitting the bearing 13 together with the roller 8 from the radial direction B to the frame 3 with the bearing 13 extrapolated to the outside. 8 has the advantage that the shaft 9 can be separated from the frame 3 by a simple procedure of pulling out the bearing 13 from the frame 3 in the radial direction B.

Further, since the bearing 13 is locked to the frame 3 so as to be able to regulate movement in the axial direction A, it is not necessary to employ a conventional stop ring such as an E-ring. Since there is no need to form a circumferential groove of the shaft body 10 for externally fitting the retaining ring, there is an advantage that the number of parts and processing locations can be reduced, and product cost can be reduced.

Therefore, by adopting the above-described roller shaft support structure in the photosensitive material transporting unit of the photographic processing apparatus having a large number of rollers, the number of man-hours for assembling and disassembling the rollers and the product cost are greatly increased. This has a very remarkable advantage that a significant reduction can be achieved.

The bearing 13 is fixed to the frame 3 by fixing.
Instead of being mounted on the frame 3, it is fitted and mounted on the frame 3, so that attachment and detachment with the frame 3 can be performed extremely easily, and the bearing 13 is not mounted on the frame 3 by press fitting. Therefore, when the frame 3 is a resin molded product,
This has the advantage that the press-fitting of the bearing 13 can suitably prevent the frame 3 from being cracked and broken.

Further, since the movement of the bearing 13 in the axial direction A is restricted, the bearing 13 can be suitably prevented from coming off the frame 3 due to the abutment and pressing of the roller body 10. Photosensitive material transport unit 1 due to poor rotation of roller 8
There is an advantage that a smooth operation of the photographic processing apparatus can be expected without causing the inoperability of the photographic processing apparatus.

Since the end face of the bearing 13 on the roller body 10 side and the end face of the roller body 10 are in contact with each other, even if a stop ring such as an E-ring is not employed, the roller in the axial direction A can be used. 8
Has the advantage of being able to regulate the movement of

The bevel gear 20 inserted into the shaft 9
Is to prevent the bevel gear 20 from being detached from the shaft body 9 because the thrust load by the bevel gear 23 of the driving shaft 22 is urged while the thrust load is locked by the bearing 13 located in the urging direction. It has the advantage that it can be done.

The supporting structure of the roller shaft according to the present invention comprises:
It is not limited to the above embodiment. That is, in the above embodiment, the support structure of the roller shaft is employed in the photosensitive material transport unit of the photographic processing apparatus, but the support structure of the roller shaft according to the present invention is provided at other places in the photographic processing apparatus. In addition to the photo processing device, any other device that conveys sheets, such as a copy machine, a fax machine, and a printer, can be used.

Further, the shape of the bearing in the roller shaft supporting structure according to the present invention is not limited to the above-described embodiment, and a locking piece is formed which comes into contact with the front side and the back side of the frame 3 in the axial direction. When the bearing 13 is used, the movement of the bearing 13 in the axial direction with respect to the frame 3 can be restricted.

Further, the manner in which the shaft 13 is attached to the frame 3 is also limited to the above embodiment, that is, the manner in which the bearing 13 is fitted into the notch groove 4 formed in the edge of the frame 3 and attached. For example, as shown in FIG.
An insertion hole 26 having substantially the same inner diameter as the outer diameter of the bearing 13 is formed, and a predetermined number of protruding pieces 27 are extended in the insertion hole 26 in the inward direction. If the notch 28 through which the protruding piece 27 can be inserted is formed, the bearing 13 is inserted into the insertion hole 26 from the axial direction A with the protruding piece 27 and the notch 28 facing each other. By rotating a predetermined angle, the bearing
The locking member 13 is locked to the frame 3 by the locking pieces 13a and 13b abutting on the protruding piece 27 in the axial direction A. Therefore, there is an advantage that the bearing 13 can be attached to an arbitrary position of the frame 3 without being limited to the edge of the frame 3.

In the above embodiment, the length of the roller body 10 is set to the distance between the bearings 13 and 13 so as to restrict the movement of the shaft body 9 in the axial direction A. bearing
13, but for example, the shaft of the roller body 10
9 and the length of the lala body 10 are limited.If it is not possible to change the length of the roller body 10 to abut the bearing 13, The bearing 13 may be brought into contact with the roller body 10 by changing the length in the direction A.

[0036]

As described above, in order to restrict the movement of the shaft body in the axial direction, the engaging piece which can be brought into contact with the frame body in the axial direction is formed on the bearing. Since it can be prevented from detaching from the body, it is not necessary to employ a retaining ring such as an E-ring as in the related art, so that the roller can be easily assembled and disassembled, and
Product cost can be reduced by reducing the number of parts and processing locations.

Further, in the roller shaft supporting structure according to the present invention, the roller body can contact the bearing in order to restrict the movement of the shaft body in the axial direction.
Even if a stop ring such as an E-ring is not employed as in the related art, the movement of the shaft body in the axial direction can be regulated, and therefore, the shaft body and the roller body can be positioned at suitable positions with respect to the frame body. ,
In addition, since the state can be maintained, the roller can be smoothly and accurately conveyed.

Further, in the roller shaft supporting structure according to the present invention, the bearing is detachably mounted on the frame body in the radial direction, so that the bearing is extrapolated to the shaft body. Thus, while the shaft can be assembled to the frame, the shaft can be pulled out of the frame and disassembled while the bearing is extrapolated to the shaft, facilitating the assembly and disassembly of the rollers. Can be done.

[Brief description of the drawings]

FIG. 1 is a photosensitive material transporting unit of a photographic processing apparatus showing one embodiment of the present invention, wherein (A) is a schematic side view,
(B) is a sectional view taken along line XX of (A).

FIG. 2 is an enlarged view of a main part including a partial cross section of the photosensitive material transport unit of the embodiment.

FIG. 3 is an enlarged perspective view of a roller shaft support structure of the embodiment.

FIG. 4 is an enlarged perspective view of a roller shaft support structure according to another embodiment.

FIG. 5 is an enlarged view of a main part of a conventional roller shaft support structure.

[Explanation of symbols]

1 ... photosensitive material transport unit, 2 ... tank, 3 ... frame, 8
... Roller, 9 ... Shaft, 10 ... Roller, 13 ... Bearing, 20 ... Bevel gear

Claims (3)

[Claims] A shaft (9) having a roller body (10) is a bearing
A support structure for a roller shaft rotatably supported on the frame body (3) via (13), wherein the bearing (13) is in the axial direction (A).
In order to restrict movement to the bearing (13), the frame (3)
And a locking piece (13a, 13b) that can be contacted in the axial direction (A) with the roller shaft. 2. The roller body according to claim 1, wherein the roller body is capable of abutting on the bearing to restrict movement of the shaft body in the axial direction. Roller shaft support structure. 3. The bearing (13) is radially mounted on the frame (3).
3. The roller shaft support structure according to claim 1, wherein the roller shaft support structure is detachably mounted from (B).