JPS625869A - Printer - Google Patents

Abstract

PURPOSE:To enable a paper to be smoothly supplied, by mounting a paper bail member onto a carriage and moving it toward and away from a platen. CONSTITUTION:With a solenoid energized, a fixed plate 2 is attracted, and the paper bail member 1 fitted to the plate 2 is separated from the platen 13, so that a gap of delta1 is provided between the platen 13 and the member 1. A passage for a paper 14 is thereby enlarged, so that forward movement of the leading end of the paper 14 is not hindered, and the paper is smoothly fed out. With the solenoid 4 de-energized, the plate 2 is pushed back to the platen 13 by a spring 3, so that the member 1 is brought into contact with the platen 13, thereby pressing a printing part of the paper 14 against the platen 13. As a result, favorable printing is performed.

Description

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

Conventional technology A conventional printing device had a structure as shown in FIG.

That is, the paper pressing member 1sA is integrally fixed to the reinforcing plate 15B and fixed to the printing plate 5 with screws. At this time, the paper pressing member 1sA is the reinforcing plate 1sB.
As shown in FIG. It is set up to be.

Further, the gap between the paper pressing member 16A and the tip of the printing pad 5 is set to such an extent that the ink ribbon 11A housed in the ink ribbon cartridge 11 can easily slide thereon. The print head 5 is constructed by using a motor to rotate a timing belt 13 fixed to a carriage 6 supported by a shaft 8 fixed to the main body, rollers 7A, 7B, 7C rotating on a rail 10, and rollers 9. Move in the axial direction. By doing this, the rad 5 for printing on the paper 14 is
The printed portion is in close contact with the platen 13.

Problems to be Solved by the Invention However, with such a structure, when the paper 14 is fed onto the platen 13 by the paper feed tractor 12, the paper pressing member 15A is in contact with the platen 13. The leading edge of the paper 14 is pressed against the paper pressing member 16A.
This has caused problems such as poor paper supply due to the obstruction between the paper and the platen 13.

Therefore, the present invention aims to eliminate these conventional drawbacks, and provides a gap between the paper pressing member and the platen when paper is fed, so that the paper can be fed smoothly. .

Means for Solving the Problems In order to achieve this object, the present invention is such that a paper pressing member is attached to a carriage and is movable in the front and rear directions with respect to the platen.

For production The effect of this technical means is as follows.

That is, when the paper is fed onto the platen, a gap is provided between the paper pressing member and the platen, making it easier to feed the paper. Further, the paper pressing member serves as a guide surface for the leading edge of the paper, and the paper is smoothly fed onto the platen.

When the paper is already supplied onto the platen, the paper pressing member is in contact with the platen, so that the printing portion of the paper is brought into close contact with the platen, and good printing can be performed.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a paper pressing member. This paper pressing member 1 is fixed to a fixed plate 2 attached to a keyer ridge 6 so as to be movable back and forth, and is pressed against a platen 13 by a spring 3.

Further, the fixing plate 2 is attached to the solenoid 4 and is attracted in a direction away from the sieve tray 13.

5 is a print head, and the gap between the tip of the print head 5 and the paper pressing member 1 is the ink cartridge 11.
The ink ribbon 11A stored in the ink ribbon 11A is set so as to be able to slide smoothly. The print head 5 has a shaft 8 fixed to the main body and rollers 7A, 7B, 7 rotating on a rail 1o.
The timing belt 13 is attached to a carriage 6 supported by C and rollers 9, and is moved along the shaft 8 by rotating a timing belt 13 fixed to the carriage 6 with a motor. A paper 14 is sent out by the paper feed tractor 12, wound around the outer periphery of the platen 13, and printed by the rad 5.

Next, the effects of the configuration of this embodiment are shown in Figures 2a and b.
This will be explained using the drawings.

First, the case where the paper 14 is fed onto the platen 13 will be described. In this case, when the solenoid 4 is energized as shown in FIG. There will be a gap of just enough.

Therefore, the path through which the paper 14 passes is widened, so that the leading edge of the paper 14 is not hindered and is smoothly fed.

Next, a case in which the paper 14 has been completely fed onto the platen 13 will be described using FIG.

In this case, when the power to the solenoid 4 is stopped as shown in FIG. 2, the fixed plate 2 is pushed back to the platen 13 by the spring 3, so the paper pressing member 1 fixed to the fixed plate 2 comes into contact with the platen 13. Therefore, the printed portion of the paper 14 is brought into close contact with the platen 13. As a result, good printing results.

Next, regarding other embodiments of the present invention, FIGS. 3 and 4 a,
This will be explained using b.

FIG. 3 describes another embodiment, in which a paper pressing member 1 is rotatably attached to a carriage 6 and fixed to a fixed plate 2 attached to a carriage e so as to be movable back and forth. It is pressed against the platen 13 by a spring 3.

Further, the fixing plate 2 is attached to the blade 5 nod 4 and is sucked rearward to the sieve tray 13.

In this case, as in the above embodiment, as shown in FIG.
When the solenoid 4 is energized, the fixing plate 2 is attracted, and the paper pressing member 1 attached to the fixing plate 2 is not tilted by θ around the attachment part of the carriage 6, but a gap of δ2 is provided. Paper 14 is smoothly fed out.

Further, even when paper is fed from above as shown in Figure 4, the passage path is wide, so it can be easily fed and also serves as a guide surface for the leading edge of the paper.

In addition, the above 1. In the second embodiment, the solenoid 4 and spring 3 are used to move the bolt fixing plate 2, but gears or belts may also be used.

Effects of the Invention The present invention makes it possible to easily feed paper to the platen by moving the paper pressing member in a direction away from the platen. It has the effect of making it possible to feed paper from any direction, and is of great industrial value.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing the main parts of a printing device according to an embodiment of the present invention, FIGS. 2a and 2b are side views for explaining the effects of the paper pressing member of the same device, and FIG. A configuration diagram showing the main parts of a printing device according to another embodiment, FIG. 4a,
b is a side view for explaining the effect of the paper pressing member of the same device, FIG. 5 is a configuration diagram of the main parts of a conventional printing device, FIG. The figure is a side view showing the effect of the paper pressing member of the same device. -...Paper pressing member, 2...Fixing plate, 3...Spring, 4...Solenoid,
6... Print head, 8A... Ink ribbon, 1-3... Platen, 14...
Paper. Name of agent: Patent attorney Toshio Nakao and 1 other person11
Figure / fI island ff, A 1st A1. Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] A print head that performs printing by hitting paper running on a platen from above an ink ribbon with the tips of multiple needles, and a print head that is attached to a carriage that fixes this print head and is located between the ink ribbon and the paper. and a paper pressing member for pressing the paper against the platen, the paper pressing member moving in the front and back direction with respect to the platen.