JPS6130912B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a Braille printer device, and more particularly to a Braille printer device that improves the facing precision between a hammer pin and a platen hole, and produces protruding dots with a smooth surface without tearing the Braille dots. .

Conventionally, this kind of Braille dots have generally been made manually using a jig shown in FIG. 1A. In the figure, 1 is a metal plate for Braille, and a sheet of paper 2 for creating Braille is placed on top of it, and a pin 3 is pressed into the recess for the Braille dots formed in the metal plate, as shown in Figure 1B, to plastically deform the paper. Was.

Another method, as shown in FIG. 2A, is to mechanically form Braille dots using a magnet. In the figure, a hole 5 for forming Braille dots is provided in the platen 4, and a hammer 7 having a pin 6 on the opposite side is supported by a hammer shaft 8, and the paper 2 is drawn by attracting the rear end with a magnet.
A blow is applied with the pin 6 at the tip of the hammer to form a Braille dot. Reference numeral 9 indicates a core of the magnet, and reference numeral 10 indicates a coil attached to the core, which operates the hammer 7 in response to a print signal.

The shape of the Braille dots formed by the mechanically free-written hammer is largely determined by the diameter of the platen hole 5 and the gap between the diameters of the hammer pins 6. That is, if the gap between the hole 5 and the pin 6 is too large, the pin 6 will not apply enough pressure to the paper 2, and the paper 2 will not be properly deformed into a hemispherical shape.

Conversely, if the gap between the pin 6 and the hole 5 is small, part of the Braille dot will break.

Since there are important factors regarding the gap relationship, the applicant conducted experiments and found that the gap C between the diameters of the hole 5 and the pin 6 shown in FIG. 3 is (C=A-B/2). A diameter of about 0.2 to 0.4 mm was stable for Braille paper, and a good shape of Braille dots could be obtained.

However, usually a plurality of hammer pins 6 and holes 5 in the platen must be installed facing each other, and because of this, there are dimensional tolerances of each part and horizontal tilting of the hammer 7 during flight, so there are problems ranging from several tens of digits to hundreds of digits. In order to make the above-mentioned gaps uniform throughout the girder, the dimensional tolerances of each part must be extremely strict, which increases the cost of the device and makes maintenance and adjustment extremely difficult.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a Braille printer device that improves the facing accuracy of the hammer pin and the platen hole and does not cause dot breakage.

In order to achieve the above object, the present invention is characterized in that it provides a Braille printer device that prints by stamping a platen having holes for forming Braille dots through a sheet of paper using a hammer provided with pins of the size of Braille dots. A plastic resin film such as a nylon film or Mylar sheet is formed on the surface having holes.

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 4A and FIG. 4B, the platen 4
A plastic resin film 11 such as a nylon film or a Mylar sheet is provided on the surface having the holes 5, and the hole diameter of the platen is made sufficiently larger than the conventional hole diameter. By placing the paper 2 along the platen hole 5 provided with the resin film 11 and hitting it with the hammer pin 6, a prepared hole for forming Braille dots is plastically deformed in the resin film 11 at a position opposite to the hammer pin 6 by applying pressure several times. Formed by In the subsequent formation of Braille dots, the resin film 11 is approximately plastically deformed, and although the pilot hole (indentation) of the Braille dot is formed, an area of elastic deformation remains, and within this elastic limit, the convexity of the Braille dot is formed. Since the pressure of the resin film 11 is applied to the outer surface when the hammer pin 6 collides with it, a dot with a smooth surface can be obtained.

FIG. 5 is a cross-sectional view showing the state of conventional Braille dots and the dots of the present invention, and FIG. Since many numbers 12 are protruding, the touch is not smooth, and since the paper in the Braille dot area is not compressed, the lifespan of the Braille dot is short. When the resin film 11 is provided on the surface of the platen of the present invention, as shown in FIG. 5B, the pressure of the resin film 11 presses the surface of the dots, so a smooth surface without the fibers of the paper 2 coming out can be obtained, and the Braille can be printed on the surface. Since the paper in the dot area is compressed and hardened, the lifespan of the Braille dots is also increased. In addition, the facing accuracy between the hammer pin 6 and the platen hole 5 is extremely good because the resin film 11 is plastically deformed to fit the hammer pin 6 and the platen hole 5 after being mounted on the device, and is also able to withstand slight positional changes that occur each time the hammer 7 moves. Since the resin film 11 is soft, dots do not break.

The gap C between the platen hole 5 and the hammer pin may be approximately twice as large as the conventional gap C=0.2 to 0.4.An example of the material used for the resin film is nylon 66, which was used in the experiment.
Good results were obtained with the film having a thickness of 0.1 to 0.2 mm.

As another example, as shown in FIG.
By filling the holes 5 with plastic resin 13, the same effect as when a resin film is provided on the surface of the platen 4 can be obtained.

As explained above, in the Braille printer device according to the present invention, the plastic resin film 11 such as a nylon film or mylar sheet is formed on the surface of the platen 4 having the holes 5, or the platen holes 5 are filled with the plastic resin 13. Therefore, it is possible to obtain a Braille printer device in which the accuracy of the facing of the hammer pin 6 and the platen hole 5 is improved and the dots do not break, and the effect is extremely large.

[Brief explanation of the drawing]

Fig. 1A is a sectional view of a conventional manual dot forming jig, Fig. 1B is a sectional view of a device pressurized with a pin, and Fig. 2A is a sectional view of a conventional mechanical braille dot forming device using a magnet. 2B is a cross-sectional view when pressure is applied with a hammer pin, FIG. 3 is a diagram showing the gap between the diameter of the platen hole and the hammer pin, and FIG. 4A is a cross-sectional view when the resin film of the present invention is provided on the platen surface. , FIG. 4B is a sectional view of a Braille dot pressurized with a hammer pin, FIG. 5A is a sectional view of a Braille dot made by a conventional device, FIG. It is a sectional view in which a platen hole is filled with plastic resin as another example of the invention. In the figure, 1 is a metal plate for Braille, 2 is paper, 3 is a pin, 4 is a platen, 5 is a platen hole,
6 is a hammer pin, 7 is a hammer, 8 is a hammer shaft, 9
10 is a core, 10 is a coil, 11 is a resin film, 12 is a paper fiber, and 13 is a resin.

Claims (1)

[Claims] 1 A platen having holes for forming Braille dots,
A Braille printer device that performs stamping by holding a sheet of paper between a pin provided at a position corresponding to the hole and driven by a hammer, and causing the pin to collide with the hole, having the above-mentioned hole. A Braille printer device characterized in that a platen surface is coated with a plastic resin film such as a nylon film or a Mylar sheet.