JPH02184473A - Tractor mechanism - Google Patents

Abstract

PURPOSE:To perform locking and to facilitate lateral movements and regulation of the width of a printing sheet by providing a lock lever and an angle, employing the spring of a pressure cover retainer to apply tension to the lock lever, and bringing it into contact with a stopper. CONSTITUTION:When a tractor mechanism is laterally moved or the width of a printing sheet is regulated, the angle 7 of a lock lever 6 is held, and the lock lever 6 is pressed in a pressing direction B. Then, the contact part 9 of the lock lever 6 in contact with a stopper 8 is escaped is a moving direction C to release the locking state. If it is returned, the contact part 9 of the lock lever 6 is brought into contact with the stopper 8 by the tension of a spring 10. When a shaft is associated with a shaft insertion hole 11, the lock lever 6 is opened or closed to perform the lateral movements and the regulation of the width of a printing sheet 5.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tractor mechanism, and particularly to a tractor mechanism for feeding paper in a printer device or the like.

[Conventional technology]

Conventional tractor mechanisms did not have a lock lever function.

Therefore, the mechanism is difficult to move from side to side, adjust, and stop rotation with respect to the shaft.

In addition, the pressure cover holder used two or one spring, and had only the function of a pressure cover holder.

[Problem to be solved by the invention]

However, the above-mentioned conventional tractor mechanism does not have a lock lever function, so it is not easy to move it from side to side, adjust the width when setting paper, or fix it to the shaft. The drawback was that it only had the following functions:

[Means to solve the problem]

The tractor mechanism of the present invention is configured to provide a lock lever and a corner portion, apply tension to the lock lever together with a spring of a pressure cover holder, and lock the lock lever by applying it to a stopper portion.

〔Example〕

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

FIGS. 1(a) and 1(b) are a front view and a side view showing an embodiment of the present invention.

The tractor mechanism shown in FIGS. 1(a) and 1(b) is
, a tractor belt 3, a pin 4 attached to the tractor belt 3, a pressure cover 1 for covering the tractor belt 3, and a lock lever 6 provided with a corner 7 for easy grip when opening and closing. , and a spring 10 that applies tension to the lock lever 6 and serves to hold down the pressure cover 1.

Next, the operation of the embodiment shown in FIGS. 1(a) and 1(b) will be explained with reference to the drawings.

In the tractor mechanism shown in FIGS. 1(a) and (b),
When the rotating section 2 is rotated in the rotation direction A, the printing paper 5 is fed in the rotation direction A by the tractor belt 3.

The printing paper 5 is under pressure by the pressure cover 1.

As shown in FIGS. 1(a) and 1(b), when moving the tractor mechanism to the left or right or adjusting the paper width of the printing paper, hold the corner 7 of the lock lever 6 and press the lock lever 6.
When is pushed in the pressing direction B, the abutment part 9 of the lock lever 6 that was in contact with the stop part 8 escapes in the movable direction C, and the locked state is released.

When the lock lever 6 is returned to its original position, the abutting portion 9 of the lock lever 6 comes into contact with the stopper portion 8 due to the tension of the spring 10. When the shaft is assembled into the shaft through hole 11, it is possible to easily move it from side to side and adjust the width of the printing paper 5 by opening and closing the lock lever 6.

〔Effect of the invention〕

The tractor mechanism of the present invention can be locked by applying tension to the hook lever and applying tension to the stopper using a combination of the lock lever and the spring of the pressure cover holder at the corner. This has the effect that it is easy to move the paper and adjust the paper width of the printing paper.

[Brief explanation of the drawing]

FIGS. 1(a) and 1(b) are a front view and a side view showing an embodiment of the present invention, and FIG. 2 is a perspective view showing a conventional example. ■...Pressure cover 2...Rotating part, 3...Tractor belt, 4...
Pin, 5...L for printing 6...Lock lever 7...Corner part, 8...Stopper part, 9...Butt Part, lO... Spring, 11... Shaft through hole, A...
...Rotation direction, B...Press direction, C...
- Direction of movement. Agent Patent Attorney Shinichi Uchihara

Claims (1)

[Claims] a rotating part, a tractor belt rotated by the rotating part, a plurality of pins attached to the tractor belt, and a paper feeding hole through which the pins penetrate, and pressing the tractor belt so that the printing paper does not separate from the pins. A tractor mechanism comprising: a pressure cover for opening/closing, moving from side to side, and fixing to a shaft;