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Feed roller

A technology of paper feeding rollers and convex parts, applied in the field of paper feeding rollers, can solve problems such as poor paper conveying, and achieve the effect of suppressing the generation of paper dust and the poor conveying

Active Publication Date: 2021-12-21
SUMITOMO RIKO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, paper feeding failures sometimes occur

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～18、 comparative example 1～4

[0079]The core material ( An elastomer layer (thickness: 3 mm) of a urethane rubber composition was formed on the outer periphery of SUS304). From this, it is obtained with Figure 4 or figure 1 The surface shape of the feed roller is shown. That is, on the peripheral surface of the elastomer layer, irregularities are provided by hemispherical protrusions. In embodiment 1, comparative example 1, such as Figure 4 As shown, the hemispherical protrusions are arranged so as to go around along the peripheral surface of the elastomer layer. In other embodiments, comparative examples, such as figure 1 As shown, the hemispherical protrusions are arranged helically along the peripheral surface of the elastomer layer. Further, the row of convex portions and the row of convex portions parallel to the row form continuous grooves of concave portions along the peripheral surface of the elastomer layer. In each paper feed roller, originating from the hemispherical convex portion, ...

Embodiment 19

[0090] Made by removing instead of hemispherical convex part Figure 7 A paper feed roller was obtained in the same manner as in Example 2 except for the spherical table-shaped convex portion shown. The upper bottom of the table-shaped convex portion is composed of a ground surface. The table-shaped protrusions are arranged helically along the peripheral surface of the elastomer layer. Further, the row of convex portions and the row of convex portions parallel to the row form continuous grooves of concave portions along the peripheral surface of the elastomer layer. About each size, it is as follows.

[0091] Convex separation distance a: 0.3mm, groove width b: 1.0mm, convex arrangement angle θ: 5°

Embodiment 20

[0093] Made by removing instead of hemispherical convex part Figure 6 A paper feed roller was obtained in the same manner as in Example 2 except for the spherical table-shaped convex portion shown. The upper bottom of the table-shaped convex portion is formed of a flat surface. The table-shaped protrusions are arranged helically along the peripheral surface of the elastomer layer. Further, the row of convex portions and the row of convex portions parallel to the row form continuous grooves of concave portions along the peripheral surface of the elastomer layer. About each size, it is as follows.

[0094] Convex separation distance a: 0.3mm, groove width b: 1.0mm, convex arrangement angle θ: 5°

[0095] Regarding Examples 19 to 20, the measurement of the generation amount of paper dust and the evaluation of durability were performed using the prepared paper feed rollers. The results are shown in Table 3 together with the configuration of the convex portion.

[0096] (Pape...

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PUM

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Abstract

The present invention provides a paper feed roller capable of suppressing poor paper conveyance due to accumulation of paper dust for a long period of time. The paper feed roller 10 includes a shaft body 12 and an elastic body layer 14 formed on the outer periphery of the shaft body 12 . The circumferential surface is arranged in a direction different from the axial direction X, and a continuous concave groove 18 is formed between the row of convex parts 16 in a direction different from the axial direction X and the row of convex parts 16 parallel to the row, The width of the groove 18 is larger than the separation distance of the protrusions in the row of the protrusions 16 in a direction different from the axial direction X. As shown in FIG.

Description

technical field [0001] The present invention relates to a paper feed roller suitable for use in electrophotographic equipment such as copiers, printers, and facsimiles using electrophotography. Background technique [0002] The paper feed roller is formed in a cylindrical shape, for example, from an elastic material such as cross-linked rubber, and its peripheral surface serves as a contact surface with paper. Paper dust from paper may adhere to the surrounding surface of the paper feed roller. In addition, during repeated contact with paper, paper dust may accumulate on the peripheral surface of the paper feed roller. When paper dust accumulates, the contact area of ​​the peripheral surface with respect to the paper decreases, and the friction coefficient of the contact surface with respect to the paper decreases. As a result, poor conveyance of paper may occur. [0003] There is known a device in which unevenness is formed on the peripheral surface of a paper feed rolle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B65H5/06B65H3/06
CPCB65H5/06B65H2404/1118B65H2404/114B65H3/0638
Inventor 山口和志高岛雅彦小濑峻久河野淳洋
Owner SUMITOMO RIKO CO LTD
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