JPH0357488Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field of the Invention This invention relates to a paper bail device for a printing machine.

Technical background of the invention Conventionally, in order to indicate both sides of the maximum printing width, a scale was provided on the top surface of the housing cover, and on this scale, a display section indicating the position of both sides of the maximum printing width was indicated by arrows, etc. There is something marked. Further, as another example, there is one in which a flat part of a predetermined length is formed on the outer periphery of a shaft that faces a platen and holds a paper bail roller, and a scale is formed on this flat part.

Problems with the Background Art A scale provided on the cover is difficult to see because the scale is covered with recording paper, and a scale provided on the shaft is easy to see but has the disadvantage of being troublesome to process and increases costs.

Purpose of the invention This invention was devised in view of the above points, and the purpose is to provide a paper bail device for a printing machine that makes it easy to see the maximum width of printed characters and also reduces costs.

Summary of the invention In this invention, multiple paper bail rollers are fitted to a shaft parallel to the platen, and the shaft and paper bail rollers are placed in a visible position outside, and the width of the recording paper used is The paper bail roller is moved along the shaft in accordance with the print speed, but the amount of movement of the paper bail roller at the end of the shaft in one direction is restricted by a stopper provided on the shaft, and the paper bail roller at the end is moved along the shaft to the printing maximum. It is used as an indicator to show both sides of the width, so the maximum printing width can always be checked from the top of the recording paper, and it is designed to reduce costs by reducing the number of parts. It is something.

Embodiment of the invention An embodiment of the invention will be described based on the drawings.
A platen 2 and two guides 3 and 4 are installed on opposing frames 1, and a carrier 6 carrying a print head 5 is slidably held by the guides 3 and 4. Further, a pair of left and right arms 8 that hold a shaft 7 are rotatably held in the frame 1. Three paper bail rollers 9 are fitted into the shaft 7. These paper bail rollers 9 are composed of a roller 10, a tension ring 11, and a ring presser 12. The roller 10 and the ring presser 12 are fitted to the shaft 7 so as to be rotatable and slidable in the axial direction. The tension ring 11 is made by bending a steel wire into a ring shape, and its inner diameter is slightly smaller than the outer diameter of the shaft 7.
It slides in the axial direction with respect to the shaft 7 with a predetermined sliding resistance. The ring presser 12 is the roller 1
The roller 1 is press-fitted into the expansion recess 13 formed at 0.
The tension ring 11 is held between the tension ring 11 and the tension ring 11. A retaining ring 14, which is a stopper that limits the amount of movement of the paper bail rollers 9 on both ends of the shaft 7 in the direction of the arm 8, is resiliently held in an annular groove 15 formed in the shaft 7.

Note that the shaft 7 is exposed to the outside and visible, and therefore the paper bail roller 9 is also exposed to the outside and visible.

In such a configuration, when the platen 2 is rotated, the paper bail roller 9 rotates to follow the platen 2. As a result, the recording paper 16 is fed. The paper bail rollers 9 slide against the shaft 7, but as shown in FIG.
The amount of movement of the arm in the 8 direction is A due to the retaining ring 14.
Restricted to locations shown in . The positions of the paper bail rollers 9 at both ends indicate the sides of the maximum printing width, that is, the beginning and end of the printing line. It's not like you're on top and hiding. Therefore, it is extremely easy to see. Furthermore, since the paper bail roller 9 is used as an indicator of the maximum printing width, the number of parts does not increase and the structure is extremely simple.

Alternatively, a small hole may be formed in the shaft 7, and a pin press-fitted into the hole may be used as a stopper to limit the amount of movement of the paper bail roller 9. Alternatively, the stopper may be formed by locally deforming the shaft 7 by press working.

Effects of the invention Since this invention is configured as described above, the maximum printing width can be clearly known by using the paper bail roller, and the number of parts does not increase accordingly, simplifying the structure and reducing costs. This has effects such as being able to achieve the desired results.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
The figure is a plan view, and FIG. 2 is an enlarged sectional view of main parts. 2...Platen, 7...Shaft, 8...Arm, 9...Paper bail roller, 14...Retaining ring (stopper).

Claims (1)

[Scope of utility model registration request] A shaft is installed between a pair of left and right arms and is placed parallel to the platen at a position exposed to the outside. A printing machine comprising: a plurality of paper bail rollers in contact with the platen; and stoppers provided on the shaft that interfere with the paper bail rollers sliding on the shaft at positions on both sides of the maximum printing width. paper bail equipment.