JPH04148741A - Automatic paper sheet feeder - Google Patents

Abstract

PURPOSE:To simplify structure by providing a paper sheet tray with walls at positions spaced by the width of the paper sheet, and arranging separation claws and their arms so that they come into contact with the walls at the time of feeding action. CONSTITUTION:A paper sheet tray 2 is provided with tray walls 10, 11 at positions spaced by the width of the paper sheet 1. Separation claws 7a, 8a are arranged inside the walls 10, 11 and claw arms 7, 8 are arranged outside the walls 10, 11 so as to be in contact with but not to produce resistance against the movement of the paper sheets in the direction of loading the paper sheets. While the separation claws 7a, 8a receive a force to cause them to move in the paper sheet width direction from the paper sheets 1 bent with the claws 7a, 8a during feeding action, the claws 7a, 8a are restrained by the walls 10, 11 from moving and the positions of the claws 7a, 8a remain unchanged in the paper sheet width direction. The structure is simplified and assembling efficiency is improved.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention stores a plurality of sheets cut to a predetermined size in a stack, and attaches two corners of the stacked and stored sheets to nails having a predetermined area. While restrained by.

This is an automatic paper feeder that separates and conveys a single sheet of paper from the top by rotating a friction roller that is in contact with the top with a predetermined pressure, and is used as a recording medium for copying machines, printers, plotters, etc. Used for conveyance systems.

[Conventional technology] FIG. 3 shows a schematic structure of a conventional automatic paper feeder.

A plurality of sheets (cut sheets) 1 cut to a predetermined size are stacked and stored on a paper tray 2.

A spring 4a and a spring 4b are provided between the paper tray 2 and the bottom plate 3, and the paper tray 2 is pushed upward by the repulsive force of these springs 4a and 4b.

On the other hand, a friction roller 5 made of an elastic material such as rubber is provided at the top of the stacked sheets 1, and the top of the sheet 1 is subjected to a predetermined pressure generated by springs 4a and 4b. ) will be pressed against the friction roller 5.

A rotary drive motor 6 is mechanically coupled to this friction roller 5. When the motor 6 is rotated in the direction of the arrow, the frictional force generated between the friction roller 5 and the topmost sheet of paper is The hardness of the friction roller 5 and the spring characteristics of the springs 4a and 4b are selected so as to be sufficiently larger than the frictional force generated between the paper and the second paper immediately below it.

Further, at the two corners of the paper 1, there are provided claws 7a each having a predetermined area.
, 8a and their claws 7a, 8a
A claw guide 9 (the claw guide of the claw 8a is not shown) is provided to suppress the movement of the friction roller 5 in the paper width direction.
The function is to separate the paper l while partially blocking the width of the paper.

Further, when the friction roller 5 is rotated in the same direction.

It curves at the claws 7a and 8a at the two corners of the topmost sheet of paper, and finally climbs over the claws 7a and 8a at the two corners.

As a result, the uppermost sheet is separated from the second sheet and transported in a predetermined direction.

[Problems to be Solved by the Invention] By the way, in the conventional paper, when the paper is conveyed, the paper is curved at the winter melon part.

The claws 7a, 8a receive forces acting inward or outward in the paper width.

The claw guide 9 is installed to prevent the winter melon from moving in the paper width direction due to this force, but in this case, the number of assembly steps increases, the structure becomes complicated, and the assembly efficiency decreases.

The present invention solves the above-mentioned conventional problems.

It is an object of the present invention to provide an automatic paper feeding device which can simplify the structure and improve assembly efficiency while suppressing the movement of claws in the paper width direction during paper transport, and which can reliably transport the paper.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a conventional paper tray with a wall at the same width as the paper, so that when the paper is conveyed, the claws and arms are I try to place it so that it touches that wall.

[Function] Therefore, when the paper is conveyed, the claw comes into contact with the wall of the paper tray due to the force of the curved paper, and the movement of the claw in the width direction of the paper is suppressed.

As a result, there is no need to install a claw guide.

By simplifying the claw guide structure, it is possible to reliably transport paper while improving assembly efficiency.

[Example] The present invention will be specifically described below with reference to an example shown in FIG.

In each figure, the same components as those in FIG.

As shown in FIGS. 1 and 2, the paper tray wall 10.11 of the present invention is provided in the width direction of the paper 1, and the winter melon 7a,
8a is in contact with the inside of the paper tray wall 10.degree. 11 in the paper width direction, and each arm 7.8 is in contact with the outside thereof so as not to provide resistance to movement in the paper stacking direction.

With the above configuration, when the feeding operation is performed, the winter melons 7a and 8a come into contact with the paper tray wall 10.11 due to the force of the curved paper, so the position of the claw in the paper width direction does not change at all times.

[Effects of the Invention] As described above, the automatic paper feeder of the present invention has a simple structure of just adding a paper tray wall to the conventional one, which improves the assembly efficiency and enables paper to be transported reliably. Has excellent effects.

[Brief explanation of drawings]

FIGS. 1 and 2 are a perspective view and a plan view, respectively, showing the structure of an automatic paper feeder that is an embodiment of the present invention. Further, FIG. 3 is a perspective view showing the structure of a conventional automatic paper feeder. 1: Paper 2: Paper tray 5: Friction roller 7, 8: Arms 7a, 8a: Claws 10.11: Paper tray wall

Claims (1)

[Claims] 1. Load and store multiple sheets of paper, restrain the two corners of the paper,
In an automatic paper feeder that separates and transports the topmost paper by rotation of a friction roller that contacts the top of the paper with a predetermined pressure, a paper tray is placed at the same width position as the paper cut to a predetermined size. Equipped with a paper tray with walls and an arm that is rotatable in the paper loading direction and equipped with claws that restrict the two corners of the paper to a predetermined area.The paper tray wall prevents the claws from moving in the paper width direction when paper is transported. An automatic paper feeding device characterized by preventing paper jams and double feeding.