JP3023877U - Outer diameter variable conveyance roller - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To prevent double feeding and wrapping of paper by a carrying roller. SOLUTION: A rubber-like elastic body having a low hardness is inserted and compressed from both sides to change the outer diameter to enhance the frictional force.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention is an outer diameter variable roller that can arbitrarily change the frictional force of a roller that feeds paper, resin film, etc., of office machines such as copiers, facsimiles, printers and the like.

[0002]

[Prior art and its problems]

 Conventionally, the rubber roller used to feed paper, such as paper and resin film, determines the frictional force by selecting the material or finishing the surface roughness and surface shape by polishing after molding. Use rubber with low hardness to provide sufficient grip on paper. This increases the contact area between the roller and the paper that presses against it, and as a result, the frictional force can be increased.

However, this conventional method is effective for feeding sheets of the same surface state or the same thickness, but when feeding sheets of different surface state or thickness, if the grip force is too high, the sheet or the like If the grip force is insufficient, the problem of not transporting the paper will occur. Therefore, it is limited to the use of conventional roller special paper.

[0004]

[Means for Solving the Problems]

 In view of this, the present invention provides a low-hardness rubber-like elastic body by inserting one low-hardness rubber-like elastic body or a plurality of low-hardness rubber-like elastic bodies and compressing the entire rubber-like elastic body from both sides of the roller core. Was bulged to increase the outer diameter, and this portion was used to increase the rubbing force for feeding the paper.

[0005]

[Embodiment of device]

 Circular high hardness and low hardness rubber-like elastic bodies 1 and 2 were alternately wound around the roller core 3. In the embodiment shown in the figure, one rubber-like elastic body 1 having a high hardness and one rubber-like elastic body 2 having a low hardness are interposed between the elastic bodies 1 and 1 and wound.

However, a plurality of low hardness rubber-like elastic bodies 2 may be alternately inserted at regular intervals. Then, the wound rubber-like elastic body can be compressed from both sides by, for example, the actuator 4.

When compressed from both sides, the low-hardness rubber-like elastic body 2 swells, and the outer diameter is larger than that of other high-hardness rubber-like elastic bodies. Will increase.

[0008]

【Example】

 Using Hs70 silicone rubber as the high hardness rubber-like elastic body and Hs20 silicone rubber as the low hardness rubber-like elastic body, as shown in FIG. A rubber roller was manufactured by interposing a low-hardness rubber-like elastic body 2 in between.

By varying the compressive strength of the actuator 4 from both sides, a rubber-like elastic body having a low hardness was swollen to increase the outer diameter and the frictional force was measured as shown in FIG.

The results are shown in Table 1.

[0011]

[Table 1]

[0012]

[Effect of device]

 According to the present invention, by adjusting the compression force from both sides of the rubber-like elastic body according to the thickness of the paper, it is possible to smoothly feed the paper of various thicknesses without causing double feeding or winding. It is possible to transport the

[Brief description of drawings]

FIG. 1 is a diagram showing a wound state of a rubber-like elastic body.

FIG. 2 is a view showing a state in which a rubber-like elastic body is compressed from both sides.

[Explanation of symbols]

 1 rubber-like elastic body with high hardness 2 rubber-like elastic body with low hardness 3 roller core 4 actuator

Claims (1)

[Scope of utility model registration request] 1. In a conveying roller having a rubber-like elastic body wound around a roller core, at least one low-hardness rubber-like elastic body having the same outer diameter is inserted, and the entire rubber-like elastic body is provided on both sides. A variable outer diameter transport roller that can be compressed more.