JPS59148686A - Printer - Google Patents

Abstract

PURPOSE:To raise the accuracy of line feeding by stabilizing the feeding of papers only by changing the shape of a window hole without increasing the number of parts by a method in which the shape of the window hole through which the needle of a paper pusher of an impact type printer is passed is formed into such a shape that the portion above the center of the needle has a pyramidal form and the portion below the center of the needle has an inverted pyramid form. CONSTITUTION:When the tractor hole 11A of a paper 11 is matched with the window hole 1C of a paper pusher 1 during the time when the line feeding of paper is made, where the lower end of the tractor hole 11A of the paper 11 comes to the upper position of the window hole 1C of the paper pusher 1, an aperture is formed between both and the cause of hooking is removed. Even when the centers of both the holes are biased by an amount of delta, the tractor hole 11A is moved along the slope of the window hole 1C of the paper pusher 1, so that the effect of the influence is small. In short, the hooking of the tractor hole 11A of the paper 11 to the window hole 1C of the paper pusher 1 can be avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to an inkjet printing device that prints by hitting paper with a needle through an ink ribbon.

Structure of conventional example and its problems Fig. 1 shows the structure of the main parts of a general printing device. In Fig. 1, the paper pusher member 1 is integrally fixed to one reinforcing plate, and It is fixed to the print head 2. 11), the paper feeder is set at an angle of 7.1 degrees per reinforcing plate for each person, as shown in Figure 2 (b), and the paper feed rate is - It is provided so as to be perpendicular to the platen 10 in a state in which it is in contact with the platen 10 via the paper 11 fed and fed by the tractor 9. In addition, for paper pressing, the distance between section 1 and the tip of print head 2 is ink ribbon cartridge 8.
The setting is such that eight ink ribbons stored in the ink ribbon can slide easily.

The print head 2 (r'i) is fixed to a carriage 3 supported by a shaft 5 fixed to the main body, rollers 4A, 4B, 4G and rollers 6 rotating on a rail T, and a timing bell further fixed to the carriage 3. ]-12 is rotated by the morph to move in the axial direction.As a result, the printing portion of the paper 11 by the gutter 2 comes into close contact with the platen 10.

Figures 2 (a) and (b) show that the paper pushing distance in a conventional printing device is part 1, and the needles arranged at 1,000 and 1% at the tip of the print head 2 are -1 and below from the middle of the needle U. It has a force in the direction of 7.1, with an aggravation 1B in the shape of a beautiful trapezoid.

In this case, the paper presser fixed to the tractor hole of the paper 11 and the tip of the print head 2 is aligned with the position of the window hole 1B of the member 1, and the paper is fed by line feed. 1- The lower end of the paper pusher hole gets caught in the upper part of the window hole 1B of material 1 and prevents the paper from being fed. The purpose of this paper is to eliminate the drawbacks of the conventional paper, and to prevent the paper tractor hole or the paper pusher from getting caught by members, and to improve the paper line break stone 1 side width.

Structure of the Invention In order to achieve this objective, the present invention provides a window hole through which the needle passes through the paper pusher >5+S AA, and the shape of the window hole is shaped like a mountain above the center of the needle. , the downward direction is an inverted trapezoidal shape.

With this configuration, when the paper is pushed against the platen and the paper is fed while coming into contact with parts, the tractor hole of the paper is sent out without getting caught in the window hole of the member.

DESCRIPTION OF EMBODIMENTS Below, FIGS. 3 and 4 (a) show an embodiment of the present invention.
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As is clear from FIGS. 3 and 4 (a) and (b), the paper pusher has a window hole 1C in the member 1, which has a mountain shape in the upper direction from the center of the needle and an inverted trapezoid shape in the downward direction. has been established.

At the time of paper line feed, if the tractor hole 11A of the paper 11 and the window hole 1C of the paper pushing member 1 match as shown in FIG. When the first samurai comes to the upper position of the first window hole 1C, a gap is provided between the two to eliminate the cause of getting caught. That's naive. As shown in Fig. 4(b), even if the center of both holes is misaligned by δ, the paper is pushed along the slope of window hole 1C of section 1.
9, 11 people were moved from the tractor hole, and the impact was small.

In other words, the tractor hole 11A of the sheet 11 is no longer caught in the window hole 1C of the sheet 11 (ηBAJl).

Effects of the Invention As described above, according to the printing device of the present invention, stable paper feeding can be achieved by simply changing the shape of the window hole in the paper pushing member without adding any additional members.゜

[Brief explanation of the drawing]

Figure 1 is a block diagram of the main points of a general printing device, Figure 2 (a) and ■) are front and side views showing the shape of paper pressing in the conventional paper press, and Figure 3 is a diagram showing the shape of paper pressing. A configuration diagram showing the main parts of a printing device according to an embodiment of the invention, FIGS. It is a diagram. 1 ・For paper pressing, 1C...Window hole, 2...
・Print head, 8 people... Ink print head, 10...
Platen, 11 paper. 44/%
I.

Claims (1)

[Claims] A print head that performs printing by striking paper running on a platen from above an ink ribbon with the tips of multiple needles; The paper pressing member is provided with a member, and the paper pressing member is provided with a window hole through which the needle passes, and the shape of the window hole is mountain-shaped in two directions from the center of the needle, and in the downward direction. is a printing device with an inverted trapezoid shape.