JPH0663890A - Paper sheet cutting mechanism - Google Patents

Abstract

PURPOSE:To prevent the deformation of a cutter edge due to the strike of the edge of the cutter, when printed paper sheets are cut, and also to prevent the occurrence of jamming of paper sheets. CONSTITUTION:A paper sheet cutting mechanism comprises a cutter driving part consisting of a cutter edge 3 that slides for cutting printed paper sheets, a cutter cover 2 for sheathing the cutter edge 3, and a cutter plate 4 for transmitting power to the cutter edge 3, and a cutter-edge receiver capable of performing turning motion and provided with a cutter guide 5 that is opposite to the paper-sheet carrying passage 9 and fitted to another member provided separately from the cutter driving part, a cutter spring 7, and a special screw 6; and printed paper sheets are cut by the cutter edge 3. Thus, the fitting of printed paper sheets and the cutting thereof can be easily and securely carried out, and also the removal of jammed paper sheets can be easily carried out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer that cuts and uses printing paper, and more particularly to a paper cutting mechanism for the printer.

[0002]

2. Description of the Related Art In a conventional paper cutting mechanism, it is necessary to minimize the clearance between the cutter blade and the cutter blade receiver in order to improve the cutting of the paper. Therefore, in order to prevent the accumulation of assembly error and component error, power is transmitted by the drive source and the cutter drive unit having the cutter blade that slides and the cutter blade receiver are attached to the same member.

[0003]

In the above-described conventional paper cutting mechanism, the cutter driving portion having the cutter blade which is transmitted with power by the driving source and which slides, and the cutter blade receiver are attached to the same member. Since the sheet conveying path cannot be separated from the cutter driving unit and the cutter blade receiver, it is necessary to manually or automatically pass the sheet between the cutter driving unit and the cutter blade receiver.

And, in the case of this manual operation, the operability is poor,
In the automatic mode, the paper is fed by hitting the paper against the paper guide, which causes a problem that paper jam easily occurs.

It is an object of the present invention to transmit power to a cutter blade by a cutter drive portion composed of a cutter cover and a cutter plate for sandwiching the cutter blade, and to attach it to a member different from the cutter drive portion which directly faces the paper feed path. It has a cutter blade receiver that can rotate and is equipped with a cutter guide, a cutter prepreg, and a special screw.By cutting the printing paper with the cutter blade, the above-mentioned drawbacks are eliminated, and the cutter blade due to the cutter blade hitting Another object of the present invention is to provide a paper cutting mechanism that prevents the deformation of paper and prevents the occurrence of paper jam.

[0006]

The paper cutting mechanism of the present invention comprises a cutter blade that slides to cut the printing paper, and a cutter blade and a cutter plate that sandwich the cutter blade so that the cutter blade can slide. A cutter drive unit that transmits power to the cutter and a cutter drive unit that sandwiches the print paper transport path and directly faces the transport path. The cutter blade receiver has a guide and a cutter spring that applies a reaction force to the cutter guide, and a special screw that supports the center of the cutter guide and that rotates the cutter blade by the reaction force.

[0007]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is a sectional view of a paper cutting mechanism according to an embodiment of the present invention.

In FIG. 1, the paper cutting mechanism is composed of a cutter driving unit and a cutter blade receiver, each of which is a driving source 11
And is mounted in a position that faces the paper transport path 8 in between.

The cutter driving section is composed of a cutter blade 2 which receives power from a driving source 11 and which slides, and a cutter cover 1 and a cutter plate 3 which sandwich the cutter blade 2 therebetween.

The cutter blade receiver is composed of a cutter guide 4 and a cutter spring 6 which are attached to the frame 7 with a special screw 5, and is rotated by a paper transport path 8 and a fulcrum O on the extension of the cutter blade receiver. It has a movable mechanism.

Next, the operation of the paper cutting mechanism of this embodiment will be described with reference to FIG.

FIG. 2 is a sectional view when the position of the cutter driving portion of the paper cutting mechanism of this embodiment is higher than the reference position.

Power is transmitted from the drive source 11 and the protruding portion of the cutter guide 4 is in contact with the cutter cover 1 mounted on the sliding cutter 2 so as to be aligned.

In this way, the special screw 5 is sandwiched between the frame 7 and the cutter spring 6 which is mounted at a position directly facing the sheet conveying path 8 so that the protruding portions of the cutter guide 4 are in contact with each other in a flat manner. The cutter tension 4 is slid up and down with the special screw 5 as an axis by the spring tension of 1 to absorb the assembly error and the component error. That is, the surface of the cutter guide 4 that is in contact with the cutter cover 1 and the cutter blade receiving opening 9 are always parallel to each other, and the cutter cover 1 and the cutter blade 2 are also parallel to each other.
Is inserted into the cutter blade receiving port without hitting the cutter guide 4, and the printing paper at the center of the paper transport path 8 is cut perpendicularly to the cutter blade 2.

[0016]

As described above, in the paper cutting mechanism of the present invention, the power is transmitted by the drive source, and the cutter blade catches the cutter cover which sandwiches the sliding cutter blade, and the cutter blade receiver comes between the cutter cover and the frame. The spring tension of the cutter spring installed in the machine absorbs assembly errors and component errors, and the specified clearance can be secured even when the clearance of the cutter blade receiver is small when cutting the paper. You can get better.

As a result, the cutter blade support can be rotated by the fulcrum, and the operation at the time of loading the paper becomes simple and reliable.

Further, when a paper jam occurs, it is possible to easily remove the paper jam because the structure is such that the hand can enter the paper transport path.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a paper cutting mechanism according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view when the position of a cutter driving unit of the paper cutting mechanism of this embodiment is higher than a reference position.

[Explanation of symbols]

 1 Support point 2 Cutter cover 3 Cutter blade 4 Cutter plate 5 Cutter guide 6 Special screw 7 Cuttas prep 8 Frame 9 Paper transport path 10 Cutter blade receptacle 11 Drive source

Claims (1)

[Claims] 1. A cutter blade which slides to cut the printing paper,
A cutter drive unit configured to include a cutter cover and a cutter plate that sandwiches the cutter blade so as to be slidable, and a cutter drive unit that transmits power to the cutter blade, and the cutter drive unit that faces the conveyance path by sandwiching the conveyance path of the print sheet. Attached to a separate member and a projection having a convex portion at one end and receiving a reaction force in one direction at the other end, a cutter spring for applying a reaction force to the cutter guide, and the reaction force supporting the center of the cutter guide. And a cutter blade receiver provided with a special screw for imparting rotational movement to the cutter blade.