JPH03103614A - Sliding bearing - Google Patents

Abstract

PURPOSE:To simplify disassembly and assembly of a bearing by cutting off a part of a sliding bearing for supporting a shaft of a rotating body, and mounting/removing the shaft from the cut part. CONSTITUTION:A driving roller 1 is driven by a motor 3 via a shaft 2. A slave roller 4 is supported on a U-shaped sliding bearing 7 having a cut part 6 via the shaft 5. The bearing 7 is guided by a side plate 8 via a compression spring 9. The slave roller 4 can easily be replaced and installed by dropping the roller from above.

Description

Detailed Description of the Invention (a) Industrial Application Field The present invention relates to an annular sliding bearing that pivotally supports a rolling body such as a sheet conveying roller, and more specifically relates to an annular sliding bearing with a portion missing. It is.

(Explanation) Conventional technology The bearing of a roller that conveys sheets for image formation in a copying machine, printer, etc. is explained with reference to FIG. , C, and after inserting one shaft e1 into one hole 0 by tilting the roller d, inserting the other shaft e2 into the other hole C, and inserting a bearing f1 having a D-shaped outer periphery into the shaft e1. At the same time as inserting it, it also fits into hole C,
Then, after fitting the bearing f2 into the shaft e2 and into the hole C, the gag g is fitted into the tip of the shaft e2, which has a D-shaped cross section.
Thrust positioning was performed by inserting tightening washers 11 and i2 into stop grooves ht and h2 at the two ends of both shafts e1+8, and the shafts were driven by a drive system (not shown) via a gag. ．． Further, as shown in FIG. 8(a), a square hole j is provided in the side plate a, a cutout part k is provided in the upper part of this square hole j, and a roller d is provided.
The shaft e is inserted through the cutout k, and the bearing β is fitted onto the shaft e and into the hole J from the outside of the side plate a.

Then, as shown in FIG. 8(b), the tension spring m hooks the lower part of the bearing 2 and locks into the notches n and n at both ends of the spring m, and the roller is moved through the bearing 2 and the shaft e1. It is configured to press d upward. (C) Problems to be Solved by the Invention However, in the conventional example described above, for example, the one shown in FIG. The operation of inserting the hole C into another hole C has the drawback that automatic assembly is difficult.

In addition, in order to fit the bearings f, f* and gag, the roller d must be supported at the center of the holes c and c, which hinders assembly of automatic working machines by robots. .

In addition, the surface of roller d is often fitted with materials that deteriorate over time, such as rubber, and it is difficult to disassemble and reassemble to replace this rubber, making it extremely difficult to maintain. - It had the disadvantage of impairing serviceability.

Therefore, an object of the present invention is to provide a sliding bearing that is easy to maintain and service by removing a portion of the annular sliding bearing. (2) Means for Solving the Problems The present invention has been made in view of the above-mentioned circumstances. For example, as shown in FIG. An annular sliding bearing (
7) is partially missing to form a missing part (6), and the shaft part (5) is attached and detached through the missing part (6).

(f) Effect Based on the above structure, a part of the annular sliding bearing (7) is missing to form a missing part (6), so the missing part (
The transfer body (4) is disassembled and assembled by attaching and detaching the shaft portion (5) of the transfer body (4) through step 6). Note that the reference numerals in the brackets above are for illustrative purposes only, and do not limit the configuration in any way. It's not a thing.

(f) Examples Examples of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment. Reference numeral 1 denotes a drive roller, which is supported by a shaft 2 in the main body of the apparatus by a bearing (not shown), and is driven by a motor 3. FIG. Then, the driven roller 4 facing this is connected to the missing portion 6 via its shaft 5.
It is pivotally supported by a U-shaped sliding bearing 7. This bearing 7 is guided vertically by a side plate 8, and the bearing 7
A compression spring 9 is interposed between the side plate 8 and the driven roller 4 so that the driven roller 4 presses the driving roller 1, and the driven roller 4 is driven by the driving roller 1.

In the case of such a bearing arrangement, when the drive roller 1 is removed,
The driven roller 4 can be easily replaced, and the new roller 4 can be easily assembled by dropping it from above.

Although not shown, the thrust of this roller 4 is caused by the shaft 5.
By attaching a tightening washer to the end, the load is placed on the bearing 7. Next, a second embodiment will be described with reference to FIG.

A driven roller (not shown) is attached to the shaft 5.

A reduced diameter portion 10 is provided at both ends of the shaft 5, and a guide groove 12a for the side plate 8 is provided in a bearing member 12 having a U-shaped radial bearing surface 11. Note that there is a first groove (not shown) between the bearing member 12 and the side plate 8.
A compression spring is interposed as in the figure.

In such a bearing arrangement, as described above, the roller 4 can be easily replaced, and the thrust load of the shaft 5 is received by the side surface of the reduced diameter portion 10 and the side surface of the radial bearing surface 11, so that the roller 4 can be easily replaced. It is not necessary to use a tightening washer as described in connection with FIG. 1, and the structure and assembly are simplified.

Next, a third embodiment will be explained with reference to FIG. In this embodiment, a bearing stand 14 is used to hold the bearing member 13 instead of a side plate. The U-shaped bearing member 13 is provided with a thrust bearing 13a, the U-shaped bearing stand 14 is made of polyacetal or polycarbonate, etc., and both side members 14a are provided with grooves 14b into which the thrust bearing 13a is inserted. , this groove 14
The ends of the four standing members divided by b are inwardly provided with claws 15a,
15b, and a compression spring 16 is provided at the bottom of the bearing stand 14. Then, when the bearing member 13 is pushed from above toward the claws 15a and 15b, the bearing stand 14 is elastically moved by 1k and the claws 15a
, 15b are opened, the bearing member 13 is inserted into the bearing stand 14, and the bearing member 13 is urged upward by the compression spring 16. Then, when the bearing member 13 is pulled upward with a tool or the like, the bearing member 13 is easily pulled out of the bearing pedestal 14 due to the elasticity of the bearing pedestal 14.
You can escape from.

As a result, the bearing member 13 does not escape from the bearing stand 14 in any three-dimensional direction, and the bearing member 13 can be mounted at any position, and the assembly for attaching and detaching the shaft 5, that is, the roller, is possible. The ease of attachment and serviceability of handling can be greatly improved.

Next, a fourth embodiment will be described with reference to FIGS. 4(a) and 4(b).

In this embodiment, the roller 19 is fixedly supported.
The bearing 20 of the shaft 21a and the bearing 22 of the shaft 21a of the roller 21 which is pressurized by the shaft 21a are both formed in a U-shape, and the bearing 22 is guided by a support plate 24 which is pivotally supported by a fixed pin 23. In FIG. 4(a), the compression spring 25 is
2 and a support plate 24, and the other end of the support plate 24 is screwed to the main body of the device. In FIG. 4(b), the bearing 22 is directly attached to the support plate 24 and the support plate 24 is Board 2
4 is suspended from the main body of the device via a tension spring 26. That is, the pressure conditions from the roller 21 to the roller 19 are as shown in FIG. 4(a). (b) Both are the same. Although such a pressure mechanism is complicated, in Fig. 4(a), the screw is removed and
In FIG. 4(b), by removing the tension spring 26, the roller 2
Roller 2 can be easily removed by releasing the pressure between 0 and 21.
1 can be removed.

Next, a fifth embodiment will be explained with reference to FIG. In this embodiment, the shaft 5 is supported by a U-shaped bearing 17, and this bearing 17 is attached to the side plate 8 with machine screws, etc., and the opening 18 into which the shaft 5 is inserted into the bearing 17 is slightly constricted. I'm here. This is applied when the shaft 5 rotates or swings with respect to the bearing 17, and it is possible to prevent the shaft 5, that is, the roller from falling off from the bearing 17, and to simplify the structure. Next, a sixth embodiment will be explained with reference to FIG. In this embodiment, a roller 28 is fitted into a resin bearing 27, and is prevented from rotating by a U-shaped groove 29 in the side plate 8.

In this way, the resin bearing 27 has a uniform wall thickness and is well molded, and because the wall thickness is uniform, heat dissipation is uniform, there is little variation in the dimensions of the bearing 27, and the fixing of the electrophotographic printer is improved. Suitable for bearing high temperature bodies such as rollers.

(G) Effects of the Invention As explained above, according to the present invention, the transfer body (4) is supported by a slide bearing (
Since the shaft portion (5) is attached and detached through the missing portion (6) of 7), the transfer body (4) can be easily replaced. Further, since the transfer body (4) can be assembled from one direction of the bearing (7), the assembly can be easily automated, which has the effect of reducing manufacturing costs.

Furthermore, since grease or the like can be easily applied from the missing portion (6) of the bearing (7), maintenance can be facilitated.

[Brief explanation of drawings]

FIG. 1 is a side view showing the first embodiment of the present invention, and FIG.
) is a perspective view of the second embodiment, FIG. 2(b) is a plan view thereof,
Figure 3(a) is an exploded perspective view of the third embodiment, Figure 3(b)
is its front view, Fig. 3(c) is its side view, and Fig. 4(a) is its front view.
) is a front view of the fourth embodiment, FIG. 4(b) is a front view of a modification thereof, FIG. 5 is a perspective view of the fifth embodiment, FIG. 6 is a front view of the sixth embodiment, and FIG. The figure is an exploded perspective view of a conventional example, and Figure 8 (
8(a) is an exploded perspective view of another conventional example, and FIG. 8(b) is a front view thereof. 4... Transferring body (driven roller) 5 Shaft part (shaft) 6... Missing part 7... Bearing

Claims (1)

[Claims] 1. In an annular sliding bearing that supports a rolling element such as a sheet conveying roller when it rotates or swings by the shaft of the rolling element, a portion of the sliding bearing is missing. 1. A sliding bearing characterized in that a cutout is formed through the cutout, and the shaft portion is attached and detached through the cutout.