JPS599834Y2 - Paper cutting equipment for office equipment, etc. - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a paper cutting device for, for example, office equipment such as a register.

Conventionally, as shown in FIG. 1, a fixed blade A and a movable blade C that rotates around an axis B are provided, and a return spring D is attached to the movable blade C.
A shaft E that presses the back edge of the movable blade C is provided on a drive link (not shown) that rotates in a plane perpendicular to the rotation plane of the movable blade C, and the downward movement of the axis E is provided. A type that cuts paper by rotating a movable blade C is often used.

The movable blade C is biased by a spring F in the opposite direction to the fixed blade A, and the blade edges are brought into point contact to promote sharpness, but since the axis E moves in an arc, the movable blade C There is only one position parallel to the dorsal edge of.

In other words, when the axis E pushes the movable blade C in the cutting direction, a component force is generated that pushes the movable blade C away from the fixed blade A in the initial stage of descent, which causes a drawback that adversely affects the performance and life of the blade edge. have.

The purpose of this invention is to develop a paper cutting device for office equipment, etc., which can eliminate the above-mentioned drawbacks.

In this invention, a movable blade is rotatably provided on one side of the fixed blade with a part facing the fixed blade at all times, and an actuating body that is connected to a drive part and moves back and forth is provided, and this actuating body or the movable blade is provided with a part that faces each other. The movable blade is formed with an inclined surface that contacts the movable blade and transmits the pressing force of the operating body in the paper cutting direction to the movable blade, and generates a component force from the pressing force to press the movable blade in the direction opposite to the fixed blade. It is characterized by:

Therefore, the movable blade is pushed by the operating body through the inclined surface and rotates in the paper cutting direction, but the pressing force in the paper cutting direction generates a force that pushes the movable blade in the direction opposite to the fixed blade. Therefore, the movable blade and the fixed blade can be slid relative to each other while bringing their blade edges into point contact, resulting in good cutting quality and extended service life.

An embodiment of this invention will be explained based on FIGS. 2 to 5.

By arranging guide plates 2 and 3 on the frame 1 so as to face each other vertically, a conveyance path 5 for conveying paper 4 such as a long receipt paper is formed.

This conveyance path 5 includes a feed roller 6 and a push roller 7.
are provided to face each other, and a printing wheel 8 and a printing hammer 9 connected to a drive unit (not shown) are provided to face each other.

Therefore, the fixed blade 1 with the blade edge facing upward is placed in the unfinished part of the conveyance path 5.
0 is placed horizontally.

A fulcrum shaft 11 is provided outside one end of the fixed blade 10 and is held by a part 1a of the frame 1, and one end of a movable blade 12 with its blade edge facing downward is attached to the fulcrum shaft 11 in the return direction by a return spring 13. It is rotatable while being biased toward the fulcrum shaft 11, and is held with some play in the axial direction of the fulcrum shaft 11.

Due to the position of the fulcrum shaft 11, the base of the movable blade 12 is always wrapped around one end of the fixed blade 10.

Next, a drive shaft 14 is rotatably held on one side of the frame 1, and a link 15, which is an operating body, is fixed to one end of the drive shaft 14 on the rear end side of the conveyance path 5.

This link 15 is located further behind the opposing movable blade 12 on one surface of the rear side of the fixed blade 10, and on the surface on the movable blade 12 side there is a roller 16 that tapers toward the movable blade 12 side.
is installed.

The outer peripheral surface of this roller 16 is an inclined surface 17.

Further, a fork 18 is fixed to the other end of the drive shaft 14, and this fork 18 is connected to a movable core 20 of a solenoid 19, which is a drive unit fixed to the frame 1.

In this structure, predetermined information is printed on the paper 4 by the printing hammer 9 and the printing wheel 8 while being supported by the feed roller 6 and the push roller 7 and being transported along the transport path 5.

The drive shaft 14 rotates together with the link 15 by energizing the solenoid 19 by operating an operation (not shown).

The movable blade 12 is pushed by the inclined surface 17 of the roller 16 and rotates within a vertical plane in the paper cutting direction.

At this time, the force applied by the inclined surface 17 in the paper cutting direction generates a component force that presses the movable blade 12 in the direction opposite to the fixed blade 10.

Therefore, the movable blade 12 slides while bringing its blade edge into point contact with the blade edge of the fixed blade 10 one after another.

Therefore, the paper 4 can be cut with good sharpness, and the life of the blade is long.

When the solenoid 19 returns, the movable blade 12 also releases the return spring 13.
is energized and returns to normal.

Incidentally, since the inclined surface 17 is formed using the outer peripheral surface of the roller 16, the movable blade 12 can be pushed down smoothly by the shifting of the roller 16.

Further, the inclined surface may be shaped toward the movable blade 12 so that it receives the pressing force of the link 15 and is deflected toward the fixed blade 10 by a component force generated from the pressing force.

As a means for this, the movable blade 12 may be provided with a roller 16 or other inclined surface.

Since this device is constructed as described above, the movable blade is pushed by the actuating body through the inclined surface, and the component force from the pressing force in the paper cutting direction pushes the movable blade in the direction opposite to the fixed blade. Therefore, the blade edges of the movable blade and the fixed blade can be brought into point contact and both blades can be slid relative to each other, allowing paper to be cut with good sharpness and the life of the blade can be extended. It is effective.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional example, Fig. 2 is a partially sectional side view showing an embodiment of the invention, Fig. 3 is a front view thereof, and Fig. 4 is a partial plan view thereof. , FIG. 5 is a perspective view of a part thereof. 4...paper, 10...fixed blade, 12...movable blade, 1
5... Link (operating body), 17... Inclined surface, 19...
... Solenoid (drive part).

Claims (1)

[Scope of utility model registration request] A movable blade is provided on one side of the fixed blade so that a part always faces the movable blade, and an actuating body is provided which is connected to a drive part and moves back and forth.
The actuating body or the movable blade is brought into contact with each other to transmit the pressing force of the actuating body in the paper cutting direction to the movable blade, and also to separate the pressure from the movable blade. A paper cutting device for office equipment, etc., characterized in that it has an inclined surface that generates force and presses the movable blade in a direction opposite to the fixed blade.