JPH038639A - Paper supply device - Google Patents

Abstract

PURPOSE:To improve the feeding ability for a recording medium such as a postcard which is relatively thick and has a large rigidity by providing a spring to be applied to a rotation support member for a recording medium separating roller to energize the recording medium separating roller to a supply paper roller, and a rotation preventing brake member for braking the rotation of the recording medium separating roller. CONSTITUTION:When a recording medium 10 passes through the gap between a supply paper roller 1 and a recording medium separating roller 3, simultaneously with feeding 'n' sheets of the recording medium 10, the recording medium separating roller 3 is pushed down to be applied to a rotation preventing brake member 5 disposed under the recording medium separating roller 3 to stop the rotation in the direction of an arrow. The uppermost sheet of recording medium 10 among the 'n' sheets of recording medium 10 fed between the supply paper roller 1 and the recording medium separating roller 3 is supplied by the supply paper roller 1, and the other sheets of recording medium 10 under it fed on the recording medium separating roller 3 are prohibited by the recording medium separating roller 3 from being supplied.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a paper feeding device, for example, a paper feeding device for feeding cut paper used in a printer or the like.

[Conventional technology]

Conventionally, when automatically feeding thick and rigid recording media such as postcards using the happy separation method, a recording medium separating member is pressed against a cylindrical paper feed roller and the paper feed roller is rotated. The structure is such that the recording medium is pulled out by the rubbing force on the contact surface between the recording medium and the paper feed roller, and the second and subsequent recording media are separated by a recording medium separation member.

[Problem to be solved by the invention]

When using the conventional frictional separation method described above to feed relatively thick and rigid recording materials such as postcards, if the insertion angle between the frictional separation member and the recording medium becomes relatively large, the feeding roller When the leading edge of the recording medium pulled in directly collides with the recording medium separating member, the surface of the recording medium separating member is likely to wear, causing the recording medium to get caught, and causing damage between the recording medium surface and the paper feed roller. This has the disadvantage that paper slippage occurs and stable paper feeding is not possible.

The purpose of the present invention is to improve the gripping property of the recording medium when feeding a relatively thick and rigid recording medium such as a postcard, and to prevent the surface of the recording medium separating member from being scratched by the leading edge of the recording medium. The object of the present invention is to provide a paper feeding device that can stably feed paper.

[Means to solve the problem]

In order to achieve the above object, a paper feeding device according to the present invention includes a paper feeding roller and a recording medium separating member that is in pressure contact with the paper feeding roller, and has a drag separation type feeding device that automatically feeds cut sheets. In the paper device, a recording medium separation roller that comes into contact with the outer periphery of the cylindrical paper feed roller, a spring that comes into contact with a rotational support member of the recording unit separation roller and biases the recording medium separation roller against the paper feed roller, and a recording medium. It has a rotation prevention brake member that brakes the rotation of the separation roller.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a vertical sectional view showing one embodiment of the present invention, and FIG.
) and (b) are detailed longitudinal cross-sectional views.

In the figure, a recording medium separation roller 3 is pushed up by a spring 6 and comes into contact with a cylindrical paper feed roller 1 via a rotation support member 2. 4 is a spring holding member. An anti-rotation brake member 5 for braking the rotation of the roller 3 is arranged below the recording medium separation roller 3 with a certain gap.

A tension spring 8 is hung on the tip of the recording medium loading platform 9, and the recording medium loading platform 9 has a tension spring 8 attached thereto.
The leading end of the body 10 is aligned by a recording medium guide plate 7, and the recording medium 1o is urged toward the paper feed roller 1 by a tension spring 8.

As shown in FIG. 2(a), when the paper feed roller 1 rotates in the direction of the arrow, the recording MA body separation roller 3 also rotates in the direction of the arrow, and feeds the recording medium 1G by sequentially biting the upper recording medium 1G.

As shown in FIG. 2(b), when the recording medium 10 passes through the gap between the paper feed roller l and the recording medium separation roller 3 (the gap is dimensioned so that up to n sheets of the recording medium 10 can pass through), n sheets At the same time as the recording medium 10 is bitten, the recording medium separation roller 3 is pushed down and comes into contact with the anti-rotation brake member 5 disposed below the recording medium separation roller 3, thereby stopping the rotation in the direction of the arrow. Among the n sheets of recording medium #10 caught between the paper feed roller 1 and the recording medium separation roller 3, the uppermost recording medium 10 is fed by the paper feed roller lk, and then the recording medium separation roller of the lower stage is fed. The recording medium 10 caught on the recording medium 3 is prevented from being fed by the recording medium separating roller 3.

〔Effect of the invention〕

As explained above, in the present invention, the recording medium separation roller that comes into contact with the outer periphery of the cylindrical paper feed roller is used as a rotating body, and by rotating the recording medium separation roller in accordance with the rotation of the paper feed roller, the gap is adjusted according to the number of sheets of recording media entering. By regulating the rotation of the recording medium separation roller and stopping the rotation of the recording medium separation roller at that time, when feeding relatively rigid recording media such as postcards, it is possible to prevent wear of the recording medium separation roller and reduce the possibility of jamming. This has the effect of improving stable paper feeding.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view showing one embodiment of the present invention, and FIG.
), (b) is a vertical section group 1II1 view. 1...Paper feed roller 2...Rotation support member 3.
... Recording medium separation roller 4 ... Spring holding member 5 ... Anti-rotation brake member 6 ... Spring 8 ... Tension spring 10 ... Recording medium 7 ... Recording medium guide plate 9 ... Recording media loading platform

Claims (1)

[Claims] (1) In a friction separation type paper feeding device that is equipped with a paper feed roller and a recording medium separation member that comes into pressure contact with the paper feed roller and automatically feeds cut sheets, the recording that comes into contact with the outer periphery of the cylindrical paper feed roller It has a medium separation roller, a spring that comes into contact with a rotational support member of the recording medium separation roller and urges the recording medium separation roller toward the paper feed roller, and a rotation prevention brake member that brakes the rotation of the recording medium separation roller. A paper feeding device featuring: