JPH0966639A - Paper presser in printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper pressing plate, which can realize uniform pressing of paper. SOLUTION: On a base part 4 bent in an L-shape, anti-rotation joggles 6... are protrusively provided on both sides of each of a plurality of respective screw holes 5... so as to check the pivoting of the paper pressing plate 1 at assembling and, at the same time, the waviness of the paper pressing plate 1. Further, a plurality of windows 7... are provided on a main body 2 portion so as to allow to be utilized as paper scooping part and act the interval between the windows 7 as an elasticity controlling part 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper retainer in a printer for bringing a recording paper into close contact with a platen.

[0002]

2. Description of the Related Art In order to perform good recording and writing on recording paper, it is necessary to bring the recording paper into close contact with the surface of the platen. Therefore, the paper presser is formed of a thin elastic metal plate,
A structure is adopted in which the recording paper is equally pressed against the surface of the platen by its elastic force.

In this type of paper retainer, the base end portion is usually attached to the base frame with a screw, but since it is formed of a thin plate material as described above, it may depend on how the screw is tightened. The paper retainer undulates,
There is a problem that the recording paper cannot be pressed uniformly in the axial direction of the platen.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and its object is to:
Another object of the present invention is to provide a new paper presser capable of uniformly pressing the recording paper against the surface of the platen.

[0005]

That is, according to the present invention, as a paper presser for a printer to achieve such a subject, a main body of a paper presser plate made of an elastic thin plate material for pressing a recording paper against the surface of a platen. A plurality of window holes are bored at intervals in the portion while leaving the elastic adjustment portion, while a plurality of screw holes are formed in the longitudinal direction at the base formed by bending the lower edge of the main body portion into an L shape. In addition to being provided with holes, locking portions for preventing rotation are provided on both sides of these screw holes.

[0006]

Embodiments of the present invention will be described below. The drawings show one embodiment of the present invention.

In the figure, reference numeral 1 is a paper pressing plate formed of an extremely thin elastic metal plate material.
Is integrally mounted on the base frame 11 with a mounting screw 9 in a direction parallel to the platen roller 10 so that the recording paper can be pressed evenly against the surface of the platen roller 10 by its upper edge 3.

That is, as shown in FIG. 1, the paper holding plate 1 forms an attachment base 4 for the base frame 11 by bending the lower edge of the main body 2 into an L shape, and further, the attachment base 4 is attached to the attachment base 4. Form a plurality of screw holes 5 ... at appropriate intervals in the longitudinal direction including the central portion in the girder direction, and sandwich these screw holes 5 ... so as to prevent rotation of the dowels on both sides in the longitudinal direction. 6 ... are formed by projecting downward by pressing, and these are formed on the base frame 1
1 is configured to be engaged with a dowel hole (not shown).

On the other hand, a plurality of window holes 12 are formed in the main body 2 of the paper pressing plate 1 at appropriate intervals to form the paper scoop portion 12 at these portions, while a plurality of windows are formed. Hole 7
The portion between them, which is weakened by piercing, is configured as an elastic adjusting portion 8.

In FIG. 3, reference numeral 13 is a recording head, 16 is a paper feed roller, and 17 is a paper guide plate.

The paper pressing plate 1 thus configured is fixed on the base frame 11 with the mounting screws 9. At this time, the paper pressing plate 1 which receives the screw tightening torque due to the friction with the mounting screws 9 is Although it tries to rotate clockwise, as described above, the dowels 6 provided on both sides of the screw hole 5 ...
.. engages with dowel holes (not shown) on the frame 11 to suppress the rotation of the paper pressing plate 1, so that the paper pressing plate 1 is correctly mounted on the frame 11 without rotating, and The tightening of the mounting screws 9 ... Prevents the upper edge 3 from waviness and being unable to evenly contact the peripheral surface of the platen roller 10.

On the other hand, when the paper pressing plate 1 is mounted on the base frame 11 in this way, the body 2 of the paper pressing plate 1 is appropriately adjusted by providing the window hole 7 and the elastic adjusting portion 8 is provided.
The upper edge 3 is pressed against the recording paper by the elastic action of, and is brought into close contact with the surface of the platen roller 10 with an appropriate pressing force.

By the way, in the above-described embodiment, the dowel 6 is provided on the side of the paper pressing plate 1 and is engaged with the dowel hole on the frame 11. However, the dowel hole provided on the side of the paper pressing plate 1 is provided. Can also be configured to engage dowels on the frame 11.

[0014]

As described above, according to the present invention, a plurality of screw holes are provided in the base portion of the paper holding plate formed of the elastic thin plate material, and the dowels for preventing rotation are projected on both sides so as to sandwich these screw holes. Since it was installed, when tightening the screw,
Due to the friction, the paper holding plate can be installed correctly without rotating, and the bending of the paper holding plate caused when the mounting screw is tightened tightly is eliminated, and a uniform pressing force is applied to the recording paper. You can

Moreover, since a plurality of window holes are bored in the main body part while leaving the elastic adjusting portion, the recording paper is pushed by adjusting the intervals of the window holes to be bored according to the thin plate material used. Not only can the pressure be kept constant, but these windows can also be used simultaneously as paper scoops.

[Brief description of drawings]

FIG. 1 is a perspective view showing a part of a paper pressing plate that constitutes an embodiment of the present invention.

FIG. 2 is a side view showing a cross section of the paper pressing plate and the peripheral portion thereof.

FIG. 3 is an exploded perspective view of a printer to which the same paper pressing plate is applied.

[Explanation of symbols]

 1 Paper Pressing Plate 2 Main Body 4 Base 5 Screw Hole 6 Dowel for Rotation Stop 7 Window Hole 8 Elasticity Adjusting Part 10 Platen

Front page continued (72) Inventor Kazuhiko Yamaguchi 3-5 Yamato, Suwa, Nagano Seiko Epson Corporation (72) Inventor Yukihiro Uchiyama 3-5 Yamato, Suwa City, Nagano Seiko Epson Corporation

Claims (1)

[Claims] 1. A plurality of window holes are formed at intervals in the main body portion of a paper holding plate formed of an elastic thin plate material to press the recording paper against the surface of the platen while leaving an elastic adjusting portion. A plurality of screw holes are formed at intervals in the longitudinal direction at a base portion formed by bending the lower edge of the main body portion in an L shape, and locking portions for preventing rotation are provided on both sides of the screw holes. A paper retainer in a printer, which is characterized by being provided.