JPS63182166A - Paper guide mechanism - Google Patents

Abstract

PURPOSE:To prevent paper jamming, by making a roller barrelshaped, and rotatably supporting the roller on a pressing shaft. CONSTITUTION:A pressing shaft 6 is disposed in parallel to a platen 1. A barrel- shaped pressure roller 7 is rotatably supported on the shaft 6, which is constantly pressed against the platen 1 by the tension of springs. A printing paper 8 is passed between a paper guide 3 on a carrier frame 4 and the platen 1, is guided to the roller 7 by the guide 3, and is passed between the platen 1 and the roller 7. Even when an edge of the printing paper is curled to the side opposite to a printing surface, the paper passed through the gap between the platen and the paper guide has a part near the center thereof clamped by the roller under the function of the paper guide, an outer part of the paper is sequentially drawn in by the roller, and is wrapped around the platen irrespective of the edge curl, so that the possibility of paper jamming can be minimized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a second row shape that is provided on a carrier of a printer device and presses a printing paper against a paper guide member and a printing surface.

[Conventional technology]

Conventionally, the roller used for press-contacting the paper guide member in the printing direction has a cylindrical shape and is rotatably held on a press-contact shaft.

[Problem that the invention seeks to solve]

The above-mentioned conventional pressure roller for making full pressure contact with the paper guide member and the printing surface has a cylindrical outer shape.
It was rotatably held on a shaft. For this purpose I
&, If the edges of both ends are curled in the opposite direction to the printing surface, the edges of the paper will be smooth when the paper passes through the gap between the printing surface and the paper guide member and passes between the printing surface and the pressure roller. This had the disadvantage that it did not get caught in the two parts of the pressurized coal row, causing paper jams.

[Means for solving problems]

In the present invention, the pressure row 2 corresponding to the paper guide member for guiding the paper to the printing surface is made cylindrical, and the paper M
It has a structure in which the extended part of the roller is shaped like a spindle, and a pressure roller in the shape of a spindle is rotatably held on a shaft.

〔Example〕

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

According to FIG. 1, the platen 1 is rotatably held by a frame (not shown), and the platen 1 is mounted on a carrier frame 4' on which the print head 2 and paper guide 31-i are mounted.
The structure is such that both ends of guide shafts 5a and 5b, which are provided to guide the guide shafts so as to be movable left and right in parallel with the guide shafts, are held fixed.

Further, the platen 1 has a structure in which a pressure welding shaft 6 is disposed parallel to the platen, and one cylindrical pressure row 27 is rotatably held on the pressure welding shaft. (not shown) is constantly pressed against the platen in one direction.

Operation t-When the paper 8 is released, the paper 8 passes between the paper guide 3 on the carrier frame 4 and the platen 1, and the paper guide 3
As a result, the pressure roller 7 exclusively passes through the space between the platen 1 and the pressure roller 7.

〔Effect of the invention〕

According to the structure explained above, υAccording to the present invention, even if the edge of the printing paper passing through the gap between the platen and the paper guide member is curled in the opposite direction to the printing surface, the portion near the center of the paper is moved by the paper guide. First, since the structure is such that the paper is bitten by the pressure roller and the outer side is successively drawn into the pressure roller 2, the paper can be wound around the platen regardless of the edge curl of the paper, so that paper jams can be prevented to a minimum.

[Brief explanation of the drawing]

FIG. 1 is a @ perspective view of an embodiment of the present invention.

Claims (1)

[Claims] In a serial printer in which a carrier carrying a print head performs printing via an ink ribbon, a paper guide member having the same shape is provided on the carrier parallel to the printing surface, and the tip of the print head is placed near the center of this paper guide member. The press shaft has a window formed so that the ink ribbon can be exposed to the printing surface, and has one rotating roller for pressing the printing paper that has passed through the gap between the printing surface and the paper guide member against the printing surface. A paper guide structure characterized in that a rotary roller has a cylindrical outer shape and is rotatably held on a pressure shaft.