JPH0462977B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The present invention relates to a roller device for electrical equipment, such as a paper feed roller device for a copying machine.

<Prior Art> In general, a roller device in an electrical device, particularly a paper feed roller device in a copying machine, has a plurality of thick D-shaped roller wheels on a roller shaft 1 having a circular cross section, as shown in FIG. 2 is fitted and fixed on the outside, and a roller 3 is fitted and fixed on the circular arc portion of each roller wheel 2 excluding the horizontal portion. However, this has the disadvantage that the roller wheel 2 tends to rotate in the radial direction (in the direction of the arrow A in the figure) with respect to the roller shaft 1 unless it is fixed very firmly.

In addition, especially when the roller wheel 2 is not provided and the roller 3 is directly attached to the roller shaft 1, the above-mentioned drawbacks become noticeable.

Conventionally, in order to eliminate the above drawbacks, the roller 3 and the wheel 2 are fixed to the roller shaft 1 by integral molding or baking.

In addition to this, as a means for preventing rotation of the roller 3 or wheel 2, as shown in FIGS. In some cases, a roller 3 or a wheel 2 is fitted onto that part.

Furthermore, as shown in FIG. 6, a through hole 5 is provided in the wheel (or roller) mounting portion of the roller shaft 1.
In some cases, the wheel 2 (or roller 3) is integrated with the roller shaft 1 by forming the through hole 5 by additional machining and by pouring plastic or the like into the through hole 5.

Further, as shown in FIG. 7, a prismatic body 6 having a substantially square cross section is used as the roller shaft, and the prismatic body 6
Some have rollers 3 (or wheels 2) fitted on the outside.

<Problems to be Solved by the Invention> In the above conventional device, the roller shaft 1 itself is an expensive lathe component, and in addition, the cross section with respect to the roller shaft 1 is D-shaped 4 to prevent the roller from rotating.
Since additional machining costs are required to form the through holes 5 and the like, the roller shaft 1 has become expensive.

Furthermore, even when the prismatic body 6 is used as the roller shaft, the prismatic body itself is expensive.

Furthermore, it was necessary to provide a separate component such as a wheel to provide reinforcement against radial slippage of the roller 3 relative to the roller shaft 1.

The present invention solves the above-mentioned problems and provides a roller device that is inexpensive and can prevent the roller from sliding around the roller shaft even if a separate part such as a roller wheel for reinforcing the roller is omitted. It is an object.

<Means for solving the problem> The problem solving means according to the present invention is as shown in the perspective view of the main part of the roller device shown in FIG.
0, and the roller shaft 10 is connected to a first side plate 12, a second side plate 13 which is integrally bent to the first side plate 12, and a roller 11 fixed to the first side plate 12 and the first side plate 12. It consists of grooves 15 for roller material intervention formed on each inner surface of the two side plates 13.

<Function> In the above problem solving means, the aura axis 10
Even when the roller shaft 10 is rotated, the bent shape of the roller shaft 10 provides a roller rotation prevention effect almost equivalent to that of the conventional columnar roller shafts. Further, since the roller material intervenes in the groove 15 to prevent the roller from rotating, there is no need to worry about the roller 11 rotating in the radial direction.

Further, since the roller 11 is directly integrally molded onto the roller shaft 10, not only is a separate component such as a conventional roller wheel unnecessary, but the unit cost of the component and processing cost are also reduced.

<Examples> The present invention will be described in detail below based on illustrated examples. FIG. 1 is a perspective view of a main part of a roller device according to an embodiment of the present invention, and FIG. 2 is a longitudinal cross-sectional view of a roller fixing portion of a roller shaft.

In this embodiment, a paper feed roller device that is disposed above a paper feed cassette of a copying machine and feeds the transfer paper on the cassette to a photoreceptor installed in the main body of the copying machine will be described.

As shown in the drawings, the present invention provides a roller device in which a roller 11 is fixed to a roller shaft 10, in which the roller shaft 10 is formed integrally with a first side plate 12 and bent in a vertical direction. a third side plate 14 that faces the second side plate 13 and is integrally bent in the vertical direction with the first side plate 12; the first side plate 12, the second side plate 13, and It consists of grooves 15 for roller material intervention formed on each inner surface of the third side plate 14.

A plurality of rollers 11 are arranged at approximately equal intervals in the axial direction of the roller shaft 10, and each roller 11 is formed into a thick D-shaped disk shape having a horizontal portion 11a and an arcuate portion 11b.

The roller shaft 10 is formed by bending a sheet metal into an upwardly U-shaped cross section.
Third side plates 12, 13, and 14 are formed. The grooves 15 are arranged on the first, second and third side plates 1.
2, 13, and 14.

Further, the second roller shafts 10 facing each other,
As shown in FIG. 1, a plurality of pairs of roller material intervention notches 16 are formed in the upper edges of each of the third side plates 13, 14 in correspondence with the rollers 11.
The width of the notch 16 is approximately the same as the thickness of the roller 11.

Furthermore, as shown in FIG. 1, a plurality of through holes 17 are formed in the approximate center of the plate surface of the first side plate 12 that connects the second and third side plates 13 and 14 to each other, corresponding to the rollers 11. ing.

The roller 11 is integrally formed by pouring synthetic rubber as a roller material into the grooves 15, notches 16, and through holes 17 and baking directly onto the roller shaft 10.

Note that the bearings at both ends of the roller shaft 10 and the clutch mechanism and drive mechanism for driving the roller shaft 10 are configured so that the roller shaft 10 can exhibit the same function as a conventional roller shaft with a circular cross section. .

In the above configuration, even when the roller shaft 10 is rotationally driven when feeding the transfer paper, the roller shaft 1
The U-shaped cross section of 0 can provide the same roller rotation prevention effect as a conventional prismatic roller shaft. Furthermore, since the roller material intervenes in the groove 15 to prevent the roller from rotating, there is no need to worry about the roller 11 rotating in the radial direction (in the direction of the arrow B in the figure).

In addition, the roller material has the notch 16 and the through hole 17.
Therefore, there is no fear of the roller 11 slipping in the thrust direction (in the direction of the arrow C in the figure).

In addition, since the roller 11 is made of synthetic rubber and is integrally molded with the roller shaft 10, it weighs 3 kg.
A durable torque of f-cm or more can be obtained, and the roller can fully function as a paper feed roller. Furthermore, the strength of the roller shaft 10 is 8mm per side plate.
There is no problem due to the U-shaped cross section.

In this way, a bent sheet metal is used for the roller shaft 10, and the roller 11 is fixed by integrally molding only synthetic rubber onto it, which eliminates the need for separate parts such as conventional roller wheels. Therefore, the unit price of parts and processing cost are extremely low. Further, by utilizing the fact that the roller shaft 10 is formed by a sheet metal pressing process, if the notch 16 and the through hole 17 are additionally formed in the press forming process, the roller 11 can be formed by forming the roller shaft 10 in a U-shaped cross section. In addition to the effect of preventing the roller 11 from rotating in the radial direction, the effect of preventing the roller 11 from slipping in the thrust direction (axial direction) can also be obtained with almost no effect on the unit price of the parts.

It should be noted that the present invention is not limited to the above embodiments, and it goes without saying that many modifications and changes can be made to the above embodiments within the scope of the present invention.

For example, in the above embodiments, the roller device of the present invention is applied to the paper feed roller of a copying machine, but it is of course not limited thereto and may be applied to rollers of any electrical equipment. However, the roller is not limited to the shape as in the above embodiment, but may be in the shape of a disc or a cylinder.

Further, the shape of the roller shaft 10 is not limited to that of the above embodiment, and the third side plate 14 may be omitted and the first side plate 10 may be omitted.
2 and the second side plate 13, or may have a W-shape, H-shape, etc. in cross section by additionally forming fourth and fifth side plates. Further, by bending the sheet metal into a curved shape, the cross section may be formed into an S-shape or a U-shape.

Furthermore, the roller material is not limited to synthetic rubber, but may also be made of synthetic resin such as plastic.

Furthermore, the notch 16 and the through hole 17 of the above embodiment
It goes without saying that it is not necessary to form and may be omitted.

<Effects of the Invention> As is clear from the above explanation, according to the present invention, a bent sheet metal or the like is used for the roller shaft, and the roller is fixed by directly integrally molding thereon, so that it does not work like a conventional roller wheel. Not only does this eliminate the need for separate parts, but the unit price of parts and processing costs are extremely low. In addition, by taking advantage of the fact that the roller shaft is formed by pressing a sheet metal, etc., if notches and through holes are additionally formed in the press forming process, the bending shape of the roller shaft and the roller material in the grooves can be formed. In addition to the effect of preventing the roller from rotating in the radial direction due to intervention, it also has the excellent effect of preventing the roller from slipping in the thrust direction (axial direction) with almost no effect on the unit price of the parts.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a main part of a roller device according to an embodiment of the present invention, FIG. 2 is a vertical cross-sectional view of a roller fixing portion of a roller shaft, and FIG. Figure 4 is a vertical cross-sectional view of the main part of a roller device according to the second conventional example without a roller wheel, Figure 5 is a vertical cross-sectional view of the main part when a roller wheel is also provided, and Figure 6 is a third conventional example. FIG. 7 is a vertical cross-sectional view of the main part of the roller device in the fourth conventional example. 10...Roller shaft, 11...Roller, 11
a...Horizontal part, 11b...Circular part, 12...First side plate, 13...Second side plate, 14...Third side plate, 1
5... groove, 16... notch, 17... through hole.

Claims (1)

[Claims] 1. In a roller device in which a roller is fixed to a roller shaft, the roller shaft has a first side plate, a second side plate integrally formed with the first side plate, and the first side plate and the second side plate. A roller device comprising a groove for inserting a roller material formed on each inner surface of a side plate.