JPH0248340A - Sheet feeding device - Google Patents

Abstract

PURPOSE:To prevent the occurrence of a miss in a pick during the feed of sheets and to perform a stable feed of relatively thin to thick sheets by a method wherein a means for bringing guide rollers into force-contact with a feed roller when a paper guide is moved to a specified position. CONSTITUTION:A paper guide 11 moves to a direction as shown by an arrow D to turn a guide roller support lever 13 in a direction as shown by an arrow E, thus pressing a guide roller support 9 down. As a result, guide roller 2, 3 on the guide roller support 9 turns to a paper feed roller 1 with a tension cover frame 15 being a fulcrum, and the guide rollers 2, 3 are brought into force- contact with the paper feed roller 1 accordingly. Consequently, it is possible to convey sheets stably without any mistake.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper feeding device, and more particularly to a paper feeding device that is used in printers and the like and feeds cut sheets.

Traditionally, this type of paper feeding device automatically feeds from thin paper used in PPCs (plain paper copiers) to thick and rigid paper such as postcards. For example, there is a friction separation method in which paper is fed one by one using a friction separation plate that is pressed against the paper feed roller, or a corner claw is provided in the paper cassette in which these papers are stored, so that the paper can be fed by the paper feed roller. There is a corner claw method in which cutting is performed one by one using corner claws.

In such conventional paper feeding devices, when feeding paper using the corner claw method, it is necessary to prepare paper cassettes for each predetermined size to load paper of a predetermined size, and to attach and remove the paper cassettes as necessary. The disadvantage is that it is an unavoidable hassle.

Additionally, when using the friction separation method to feed relatively thin paper used for PPC, etc., to thick, rigid paper such as postcards, big mistakes and double feeds occur when feeding paper. There are drawbacks.

The present invention was made in order to eliminate the drawbacks of the conventional products as described above, and it prevents picking mistakes during paper feeding and provides stable feeding of paper ranging from relatively thin paper to thick and rigid paper. The purpose of the present invention is to provide a paper feeding device that can feed paper.

A paper feeding device according to the present invention is a paper feeding device that sequentially feeds sheets of paper using a paper feeding roller and a frictional separation member that is in pressure contact with the paper feeding roller, and the paper feeding device is a paper feeding device that sequentially feeds sheets of paper using a paper feeding roller and a frictional separation member that is in pressure contact with the paper feeding roller. a guide roller that guides the leading edge of the paper by being pressed against the paper feed roller, a paper guide that is movable according to the size of the paper, and a paper guide that is provided when the vapor guide moves to a predetermined position. and means for pressing the guide roller against the paper feed roller.

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing the configuration of an embodiment of the present invention, and FIG. 2 is a sectional view of an embodiment of the invention. In FIG. has been
Guide rollers 2 and 3 are attached to both sides of the storage separation member 4 so as to be in pressure contact with the paper feed roller 1.

This guide roller 2.3 has a spring bearing member 5.6.
through the compression springs 7 and 8 respectively.
It is designed to be pressed against the

Further, the compression spring 7.8 is fixed on one guide roller support 9, and the guide roller support 9 rotates in the direction of arrow B around the rotation axis a, and this rotational movement causes the guide roller 2 to Attachment and detachment to and from the paper feed roller 1 at .degree.3 are performed.

The vapor guides 10.11 move in the directions of arrows C and D in accordance with the size of the paper 12. The vapor guide 11 is provided with a paper guide lever 11a, and when the vapor guide 11 moves to a predetermined position (postcard size position), the guide roller support lever 13 is operated by the paper guide lever 11a, and the guide roller support 9 is moved. It is pushed down by the guide roller support lever 13.

That is, as shown in FIG. 3, when the vapor guide 11 moves in the direction of the arrow, the vane (guide lever 11a also moves in the direction of the arrow), and as the paper guide lever 11a moves, the guide roller support lever 13
is rotated in the direction of arrow E, and the guide roller support 9 is pushed down by this rotational movement.

By pushing down the guide roller support 9, the guide rollers 2 and 3 on the kite roller support 9 are
Guide roller support 9 is tension cover frame 1
Since it rotates toward the paper feed roller 1 using the fulcrum 5, it comes into pressure contact with the paper feed roller 1.

When the vapor guide 11 moves from the predetermined position, the guide roller support 9 rotates in a direction away from the paper feed roller 1 due to its own weight. As a result, the guide rollers 2 and 3 separate from the paper feed roller 1.

The paper 12 (postcard) set in the vapor guides to, tt is guided by the paper loading table 14 to the paper feed roller 1 and guide roller 2.3, and the paper feed roller 1 moves in the direction of arrow A.
By rotating in the direction shown in FIG. 1, the leading end of the paper is caught by the paper feed roller 1 and the guide roller 2.3, and the paper is fed.

Since the paper feed roller 1 and the guide rollers 2 and 3 reliably catch the leading edge of the paper 12 guided by the paper loading table 14, the paper 12 is fed without directly colliding with the Ill rubbing separation member 4. Stable paper feeding is possible.

Further, by biting the leading end of the paper 12 by the paper feed roller 1 and the guide rollers 2 and 3, it is possible to reliably feed thick paper such as a postcard and the like, without picking a mistake.

In this way, the friction separation member 4 pressed against the paper feed roller 1
By providing guide rollers 2.3 for guiding the paper 12 on both sides of the paper feed roller 1 and The leading end of the paper 12 can be guided and caught by the guide roller 2.3.

Therefore, picking errors during paper feeding can be prevented, and thick and rigid paper such as postcards can be stably fed.

Also, separate the guide roller 2.3 from the paper feed roller 1,
By separating the sheets using the paper feeding roller 1 and the rubbing separation member 4, it is possible to stably feed relatively thin sheets other than thick and rigid sheets such as postcards.

In one embodiment of the present invention, the guide rollers 2.3 are provided on both sides of the frictional separation member 4, but they may be provided on one side of the frictional separation member 4, or three or more guide rollers may be provided. good.

In addition, the guide roller support 9 is activated by the operation of the vapor guide lever 11a and the guide roller support lever 13.
The guide rollers 2 and 3 are attached to and detached from the paper feed roller 1 by rotating the rollers, but the guide rollers 2 and 3 are attached to and detached from the paper feed roller 1 using another mechanism. may also be used, but is not limited to these.

1 As explained above, when the vapor guide, which is movable according to the size of the paper, moves to a predetermined position, the vapor guide moves close to the J11 rubbing separation member that sequentially feeds the paper together with the paper feed roller. By making the guide roller that guides the leading edge of the paper come into pressure contact with the paper feed roller, it is possible to prevent large mistakes during paper feeding, and to handle paper from relatively thin to thick paper. This has the effect of stably feeding even highly rigid paper.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the configuration of an embodiment of the present invention, FIG. 2 is a sectional view of the embodiment of the present invention, and FIG. 3 is a diagram showing the operation of the guide roller support lever of FIG. 2. . Explanation of symbols of main parts 1...Paper feed roller 2.3...Guide roller 4...Friction separation member 7.8...Compression spring 9. ...Guide roller support 10.11 ...Vapor guide 11a ...Vapor guide lever 12 ...
・Paper 13...Guide roller support lever Figure 2

Claims (1)

[Claims] (1) A paper feeding device that sequentially feeds sheets of paper using a paper feeding roller and a frictional separation member that is pressed against the paper feeding roller, which is provided close to the frictional separation member and that is connected to the paper feeding roller. a guide roller that guides the leading edge of the paper by being pressed against it; a paper guide that is movable according to the size of the paper; and when the paper guide moves to a predetermined position, the guide roller is connected to the paper feed roller. A paper feeding device characterized by having a means for press-contacting the paper.