JPH0550678A - Sheet feed device of printer - Google Patents

Abstract

PURPOSE:To simplify sheet feed operation and prevent skew sheet feed in a sheet feed device of a printer for a word processor or a computer. CONSTITUTION:The subject sheet feed device is designed to feed a sheet 4 by engaging it between a sheet feed roller 2 and a sheet holding lever 1, with a sheet set shutter 6 provided. Thus it is possible to simplify sheet feed operation and feed the sheet 4 in such a state that it is set straight.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feeder for a printer such as a Japanese word processor or a computer.

[0002]

2. Description of the Related Art Conventionally, there are usually two methods of paper feeding in this type of printer. One is to release the paper pressing lever at one end and manually feed the paper so that the leading end and the trailing end of the paper are fed. The method of setting while stacking and locking the paper pressure lever (hereinafter referred to as the lock method), and the other method is to press the leading edge of the paper directly against the paper feed roller to feed the paper (hereinafter referred to as the pressing method). is there.

Two conventional methods will be described below. As shown in FIG. 5, the locking method is the paper pressing lever 1
Is set to the release side indicated by arrow B, the auxiliary roller release link 8 and the auxiliary roller 3 are integrally moved about the fulcrum of the auxiliary roller release link 8 which is interlocked, and the paper feed roller 2 and the auxiliary roller 3 are separated. To be done. The paper 4 is manually fed, passed between the paper feed roller 2 and the auxiliary roller 3, the front and rear ends of the paper are overlapped, the left and right positions are adjusted, and the paper pressing lever 1 is again set and fixed in the direction shown by the arrow A. It is a method. The pressing method is as shown in FIG.
Is a method in which the front end of the sheet 4 is pressed against the contact point of the auxiliary roller 3 to feed the sheet.

[0004]

However, in the above-mentioned conventional method, the paper feeding operation is complicated, and in the pressing method, when the leading edge of the paper is temporarily applied directly to the paper feed roller, the leading edge of the paper is evened left and right. It is difficult to hit the paper, and when the paper is fed in this state, the paper is fed obliquely.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a paper feeding device of a printer which simplifies the paper feeding operation and prevents the paper from being fed obliquely. ..

[0006]

To achieve this object, a paper feeding device of a printer according to the present invention comprises a pair of rollers for feeding paper in conjunction with a paper pressing lever and a paper set shutter.

[0007]

With this structure, when the paper pressing lever is first released to feed the paper and the paper pressing lever is applied to the paper setting shutter to lock the paper pressing lever, the interlocked auxiliary roller and the paper feeding roller sandwich the paper, and the paper setting shutter moves. It will be fed out of the paper.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, reference numeral 5 denotes a paper set holder, which guides the paper 4 so that the front end of the paper 4 easily hits the paper set shutter 6. The paper set shutter urging spring 9 of the paper pressing lever 1 is always urged to interlock with the paper set shutter 6. Reference numeral 3 denotes an auxiliary roller, which is constantly urged toward the paper feed roller 2 by an auxiliary roller urging spring 10 and is separated from the paper feed roller 2 in conjunction with the paper setting shutter 6.

Reference numeral 7 in the drawing denotes a sensor for detecting the sheet 4 and 11
Indicates a gap into which the sheet 4 is inserted. The operation of the sheet feeding device of the printer configured as described above will be described with reference to FIGS. 3 and 4.

As shown in FIG. 3, when the paper set lever 6 is set in the direction shown by the arrow B and the paper pressing lever 1 is released, the paper set shutter 6 is urged by the paper set shutter urging spring 9.
Is urged toward the auxiliary roller 3 side, the auxiliary roller 3 is pulled away from the paper feed roller 2, and the paper 4 is inserted along the paper set holder 5 so that the leading end of the paper 4 does not have a gap. Apply evenly to the left and right.

Next, as shown in FIG. 4, when the paper pressing lever 1 is set and locked in the direction indicated by the arrow A, the paper setting shutter 6 interlocked with the paper pressing lever 1 is set.
Moves to the side opposite to the auxiliary roller, and the auxiliary roller 3 is urged toward the paper feed roller 2 by the auxiliary roller urging spring 10 to pinch the paper 4, the paper set shutter 6 is disengaged from the paper 4, and the paper feed roller 2 The sheet 4 is fed by rotating the. Since the paper pressing lever 1, the paper setting shutter 6 and the pair of rollers 2 and 3 are interlocked with each other in this manner, the paper 4 is first inserted into the paper setting holder 5 and fed in a straight state. So paper 4
Can be prevented from being fed obliquely.

[0013]

As is apparent from the above description of the embodiment, the present invention simplifies the paper feeding operation by the configuration including the pair of rollers for feeding the paper in conjunction with the paper pressing lever and the paper setting shutter. In addition, it is possible to realize a paper feeding device of an excellent printer that prevents paper from being fed obliquely.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing a concept of a main part of a sheet feeding device of a printer according to an embodiment of the present invention.

FIG. 2 is a plan view of a main part when the paper pressing lever shown in a state where the case of the paper insertion port of the paper feeding device of the printer is removed is released.

FIG. 3 is a cross-sectional view of a main part of the printer, in which a paper pressing lever of a paper feeding device is released and paper is fed.

FIG. 4 is a cross-sectional view of essential parts in a state where a paper pressing lever of the paper feeding device of the printer is locked and the paper is sandwiched by the paper feed rollers

FIG. 5 is a schematic sectional view showing a concept of a main part of a paper feeding device of a conventional printer.

FIG. 6 is a schematic sectional view showing a concept of a main part of a paper feeding device of another conventional printer.

[Explanation of symbols]

 1 Paper pressure lever 2 Paper feed roller 3 Auxiliary roller 6 Paper cassette shutter

Claims (1)

[Claims] 1. A paper pressing lever for pressing a paper, a pair of rollers for feeding paper in association with the paper pressing lever, and a paper set shutter for interlocking with the paper pressing lever and setting a paper by applying a leading edge of the paper. The printer's paper feeder.