JPS63173672A - Paper feeder for printer - Google Patents

Abstract

PURPOSE:To stably feed a paper and enhance the operability in setting the paper without increasing the number of component parts, by providing a paper clamp with a projected part for pressing the paper inward from the surface thereof, on the paper inlet side of the clamp. CONSTITUTION:A paper clamp 6 is provided with a projecting part 7 on the paper inlet side, whereby a paper 2 is pressed inward from the surface of the clamp 6, the wrapping angles of the paper 2 for a platen 1 and a tractor 4 are increased, and the paper 2 can be stably fed. With the paper clamp 6 thus provided with the projecting part 7 for pressing the paper 2 inward, a paper- setting operation can be completed by only opening and closing operations of the paper clamp 6, without requiring separate component parts or increasing the number of component parts.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a paper feeding device for a printer.

[Conventional technology]

Hereinafter, a conventional printer paper feeding device will be explained with reference to FIG.

In the figure, 1 is a platen, 3 is a print head disposed in front of the platen 1 facing the platen 1, and 4 is a tractor disposed behind the platen 1. 6 is tractor 4
A paper clamp is disposed above the tractor 4, and the paper clamp 6 is configured to be able to be opened and closed on the outside of the paper 2 by means of a pin (not shown) parallel to the feeding direction A of the paper 2. . Reference numeral 2 denotes paper (fanfold paper). This paper 2 is stretched between the platen 1 and the tractor 4, is clamped by the tractor 4 and the paper clamp 6, and is sent in the direction of arrow A by moving the tractor 4. It will be done. Note that the above-mentioned paper 2 is placed on the tractor 4 by opening the paper clamp 6.
Set by closing .

However, in the conventional paper feeding device described above,
When sending a plurality of stacked sheets 2, a shift 8 occurs between the upper sheet 2 and the lower sheet 2, as shown in FIG.

For this reason, the printing positions of the upper paper 2 and the lower paper 2 are different with respect to the printing frame, and there are also problems such as the paper 2 coming off the tractor 4 and causing a jam.

Therefore, a paper feeding device that can stably feed the paper 2 was developed.
This is typified by the one described in the above publication, and will be explained below with reference to FIGS. 4 and 5.

In the figure, the same reference numerals as in FIG. 3 indicate the same parts. In the figure, reference numeral 5 denotes a paper holding bar disposed between the platen 1 and the tractor 4. This paper holding bar 5 is attached to the outside of the paper 2 so that it can be opened and closed, and the paper 2 is moved from the surface (upper side) to the inside. (lower side).

This paper feeding device uses a paper presser bar 5 to push the paper 2 between the platen 1 and the tractor 4 inward from the surface, increasing the winding angle of the paper 2 around the platen 1 and the tractor 4, and stacking multiple sheets of paper. Even if you send 2, the upper paper 2
paper 2 without any misalignment between the paper 2 and the paper 2 below.
can be sent stably.

[Problem that the invention seeks to solve]

However, in the above-described conventional paper feeding device, the paper presser bar 5 that pushes the paper 2 needs to be disposed in an openable and closable manner, which increases the number of components such as the paper presser bar 5 and its hinge mechanism, resulting in higher costs.

Furthermore, when setting the paper 2, it is necessary to open and close the paper clamp 6 as well as the paper presser bar 5, which causes problems such as complicated operation of cents on the paper 2.

SUMMARY OF THE INVENTION An object of the present invention is to provide a paper feed device for a printer that can feed paper stably, does not require an increase in the number of parts, and allows easy paper cent operation.

[Means for solving problems]

The present invention is characterized in that a protrusion for pushing the paper inward from the surface is provided on the paper entry side of the paper clamp.

[For production]

According to the present invention, the protrusion provided on the paper entry side of the paper clamp pushes the paper inward from the surface, increasing the angle at which the paper is wrapped around the platen and the tractor, so that the paper can be stably fed. Further, by providing the paper clamp with a protrusion having a function of pushing the paper, no separate parts are required, the number of parts does not increase, and the paper cent operation is completed by simply opening and closing the paper clamp.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a paper feeding device for a printer according to the present invention will be described below with reference to FIGS. 1 and 2.

In the figure, the same reference numerals as in FIGS. 3 to 5 indicate the same parts.

In the figure, reference numeral 7 denotes a protrusion integrally provided on the lower surface of the end of the paper clamp 6 on the paper entry side, that is, on the platen 1 side. It has a shape that does not get caught, and is made of a smooth material, so that the feeding resistance of the paper 2 is small. As a result, there is no risk of problems such as jamming of the paper 2.

Since the paper feeding device of the printer of the present invention in this embodiment has the above-described configuration, the protrusion 7 provided on the paper entry side of the paper clamp 6 moves the paper 2 between the platen 1 and the tractor 4 from the surface to the inside. This increases the wrapping angle of the paper 2 around the platen 1 and the tractor 4, and the stacked sheets of paper 2 are stably fed without any misalignment between the upper paper 2 and the lower paper 2. be able to.

Further, since the paper clamp 6 is provided with the protrusion 7 having the function of pushing the paper 2, separate parts such as a paper presser bar and its hinge mechanism are not required, and therefore there is no risk of an increase in the number of parts. Moreover, since the operation of setting the paper 2 is completed only by opening and closing the paper clamp 6, there is no possibility that the operation of setting the paper 2 will become complicated.

〔Effect of the invention〕

As is clear from the above, the paper feeding device of the printer of the present invention is provided with a protrusion on the paper entry side of the paper clamp that pushes the paper inward from the surface, so that the paper between the platen and the tractor is pushed inward from the surface. It is possible to increase the angle at which the paper is wrapped around the platen and the tractor, and therefore the paper can be fed stably. Further, since the paper clamp is provided with a protrusion having a paper pushing function, there is no need for a paper holding bar or its hinge mechanism, and therefore there is no increase in the number of parts. Moreover, since the paper setting operation is completed only by opening and closing the paper craft, the paper setting operation does not become complicated.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of a paper feeding device for a printer according to the present invention, and FIG. 2 is a view taken in the direction of arrow 2 in FIG. FIG. 3 is a side view showing a paper feeding device of a conventional printer. FIG. 4 is a perspective view showing a paper feeding device of a conventional printer equipped with a paper holding bar, and FIG. 5 is a view taken in the direction of arrow 2 in FIG. 1...Platen, 2...Paper, 3...Print head, 4...Tractor, 6...Paper clamp, 7...
・Protrusion. Agent Patent Attorney Tadashi Akimoto Figure 1 1; Platen 4: Tractor 2: Paper
6: He-he 02 funde 3: tp uhe 7 de 7:
夾1t jIBFigure 4Figure 5

Claims (1)

[Claims] 1. Comprising a platen, a tractor placed behind the platen, and a paper clamp facing the tractor and placed so as to be openable and closable. What is claimed is: 1. A paper feeding device for a printer that feeds paper that has been loaded, characterized in that a protrusion for pushing the paper inward from the front side is provided on the paper entry side of the paper clamp.