JPH0619852Y2 - Belt drive roller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a belt driving roller used to drive a flat belt, and particularly to a flat roller made of a material having small elongation such as synthetic resin. The present invention relates to a belt driving roller having a low coefficient of friction suitable for driving a belt.

(Prior Art) Conventionally, flat belts made of a synthetic resin or the like having a small elongation have been used for various purposes because they are lightweight, have a small elongation, and have a simple manufacturing process.
However, the flat belt made of this synthetic resin has a small friction coefficient of the belt itself, and when accurate driving is required, a roller coated with a rubber-like elastic body is used as the driving roller. There is.

(Problems to be solved by the invention) However, when such a roller covered with a rubber-like elastic material is used, the flat belt runs due to left and right dimensional errors at the belt connecting portion and roller mounting dimensional errors. There was a problem in that it caused a meandering deviation in the inside and slipped off the roller.

As a method for solving this, measures such as attaching a crown to the roller or attaching a flange to the roller have been taken, but since the friction coefficient of the roller surface is large, it is not possible to prevent deviation. The flat belt rubbed against the flange and could not prevent damage to the flat belt. Furthermore, attach a guide to an appropriate place on the back of the belt,
A method of preventing the flat belt from being biased has been taken, but with this one, there is a problem in the adhesive treatment between the guide and the belt, the adhesive strength, and because the guide is attached, the belt becomes stiff and flexible. There was a problem in terms, and it was not a sufficient solution.

The present invention has been made in view of the above circumstances, and provides a belt-driving roller of a rubber-like elastic body coating type for driving a flat belt made of a synthetic resin having a small elongation without causing deviation. The purpose is to

(Means for Solving the Problems) In order to achieve the above object, in the present invention, in a rubber-like elastic body covered roller used for driving a flat belt made of a synthetic resin film or sheet having a small elongation,
The rubber-like elastic body coating layer is in a state in which short fibers are mixed and the short fibers are projected on the roller surface, and by using such a belt driving roller, deviation of the belt is prevented.

Specifically, a solution means of the present invention is a belt driving roller used for driving a flat belt, which is coated with a rubber-like elastic body, wherein the coating layer of the rubber-like elastic body is rubber or rubber-like. A short fiber-containing rubber-like elastic layer is formed by mixing short fibers in a synthetic resin having elasticity, and protruding the short fibers on the surface of the coating layer.

(Operation) As a result, in the present invention, when the flat belt tries to meander to one side, that is, when a force parallel to the roller surface acts, when this force is locally strongly applied to the roller surface, it is projected onto the roller surface. The short fibers lying on the surface of the roller lie down in the forward direction of the force, and act as a so-called roller between the belt and the roller, which reduces the friction coefficient between the roller surface and the belt back surface. As a result, the belt slips on the roller surface to eliminate the above local force and prevent the belt from meandering.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

The flat belt driving roller shown in FIG. 1 includes a shaft center 1 made of metal, synthetic resin, or the like, and a rubber-like elastic layer 2 covering the shaft center 1. As the material of the rubber-like elastic layer 2, rubber such as natural rubber or synthetic rubber, or synthetic resin having rubber-like elasticity is used. In this rubber-like elastic body, short fibers such as natural fibers and synthetic fibers having a fiber length of 0.5 mm to 20 mm, preferably 3 mm to 6 mm and a fiber diameter of 500 μ or less, preferably 20 μ to 100 μ are used. The rubber-like elastic material is mixed in an amount of 2 to 100 parts by weight per 100 parts by weight, and the short fibers 3 are projected on the surface of the driving roller by performing an arbitrary surface treatment such as polishing in the final stage of molding the driving roller. .

Next, the effect of the present invention will be described in detail with reference to Examples.
Width 200mm and length 4 using 0μ polyester film
I made a belt for electrophotographic photoreceptor of 00 mm and made it the second
The belt was hung on the driving device shown in the schematic diagram, and the deviation of the belt was measured. Here, in FIG. 2, the driving device includes a driving side roller 4 and a driven side roller 5 for driving the belt.
And a flat belt 6 hung on them. The drive roller 4 is provided with a flange 7 for measuring the force generated by the deviation of the belt. In the actual test of the present invention, the driving side roller 4 was made of aluminum, and the flanges 7 made of aluminum were attached to both ends. The biasing force of the belt (the force with which the belt pushes the flange) was measured by changing the rollers on the driven side. The results are shown in Table 1.

(Effect of the Invention) As described above, in the belt driving roller of the present invention, the short fiber protruding on the roller surface acts like a roller interposed between the belt and the roller, so that the friction coefficient of the roller surface is reduced. It gets smaller, the belt slips on the roller surface,
The flat belt can be prevented from shifting to one side, and by varying the amount of short fibers mixed in the rubber-like elastic body that covers the surface of the roller, any one can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing a belt driving roller according to an embodiment of the present invention, and FIG. 2 is a perspective view of a driving device performed to confirm the effects of the present invention. Shaft center …… 1 Rubber-like elastic body …… 2 Short fiber …… 3

Claims (1)

[Scope of utility model registration request] 1. A belt driving roller used for driving a flat belt, coated with a rubber-like elastic body, wherein the coating layer of the rubber-like elastic body is made of rubber or synthetic resin having rubber-like elasticity. A belt driving roller, characterized in that it comprises a short fiber mixed rubber-like elastic body layer in which short fibers are mixed in and the short fibers are projected on the surface of the coating layer.