JPS604761Y2 - Recording needle support device in mimeograph paper making machines, etc. - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a recording needle support device in a mimeograph paper making machine or the like.

As shown in Figure 1, a mimeograph paper making machine presses a recording needle C against a base paper B mounted on a rotating drum A, and a voltage applied to the recording needle C causes an electric discharge between the base paper and the recording needle to perforate the base paper. It is a device.

The support device for the recording needle in such a mimeograph plate making machine is a pressure contact device (not shown) as shown in FIG.

) A rotatable shaft E is attached to a needle holder having a needle rest, and a recording needle is attached to the shaft E with a screw F.

In such a recording stylus support device, the stylus tip of the recording stylus is subject to severe wear due to discharge, friction, etc., so it must be replaced frequently by inserting your finger into the narrow opening. Moreover, the replacement work is inefficient because the work of loosening the screw F, replacing the recording needle C, and retightening the screw to fix it must all be done with the fingertips of one hand. There were drawbacks such as the recording needle falling off before the screws were tightened and being left behind inside the machine, causing exhaust problems.

In order to improve this drawback, a recording stylus support device has been devised that can be replaced with one touch without tightening screws. However, in such a device, the recording stylus support device The thickness must be 0.1 to 0.2 diagonal, the width must be small, such as 5 mm, and other parts such as mounting must be used for ease of positioning and ease of holding the recording stylus. There was a drawback that it was necessary to take measures such as installing resin or the like on the recording needle.

FIG. 3 shows an example of such a device, in which a resin-molded heir G is attached to the substrate of the recording needle for mounting and positioning.

As mentioned above, the recording stylus is a consumable item, and it is obvious that the unit price of the recording stylus itself will increase if a part of it is attached with a resin-molded child. It is also clear that there are various problems compared to the manufactured recording stylus.

The present invention eliminates the drawbacks of the conventional device as described above, eliminates the need for screw tightening, and allows the recording stylus to be replaced very easily, and at the same low cost as the conventional recording stylus. It is an object of the present invention to provide a recording stylus support device that can be manufactured.

Hereinafter, the present invention will be described in detail with reference to the illustrated preferred embodiments.

Fig. 4 is a perspective view of the recording stylus holder removed from the rotating shaft, Fig. 5 is a sectional view taken along the line I-I in Fig. 4, and Fig.
The figure is a perspective view of the recording needle.

In the figure, reference numeral 1 denotes a recording stylus holder made of metal, synthetic resin, or the like, and a recessed notch 2 for holding a recording stylus body, which will be described later, is provided on the front surface 1a.

Further, the upper surface portion 1b of the recording stylus holder 1 has a legitimate child portion 3 protrudingly provided, and the lower surface portion 1c is cut out leaving a clamping portion 4 on one side of the front or rear surface. A clamping spring 5 is attached to the side opposite to the clamping spring 4.

Note that the shaft described later is press-fitted between the clamping portion 5 and the clamping spring 5.

6 is a protrusion for positioning the recording needle provided in the recessed notch 2, and 7 is a small hole opened in the recessed notch 2, into which a supporting shaft of the recording stylus support plate described later is slidably inserted. be done.

Reference numeral 8 denotes a hole provided on the rear surface portion 1d of the holder 1, which communicates with the small hole 7 and into which a knock pin described later is slidably inserted.

Reference numeral 9 denotes a recording needle, and as shown in FIG. 6, a small hole 10 into which the positioning protrusion 6 of the recessed notch 2 is inserted is bored approximately in the center of the substrate 9a, and a support described later is provided at the base end. A long groove 11 is provided for attachment to the support shaft of the plate.

12 is a recording stylus support plate, the support shaft 13 of which is connected to the small hole 7.
It is slidably inserted into the housing, and a knock pin (described later) is fixed to the end thereof.

Reference numeral 14 denotes a knock pin, which pushes the support plate 12 outward against the pressure expansion action of a spring described later to release the recording stylus, thereby allowing the recording stylus to be replaced.

A spring 15 is installed in the hole 8 and biases the support shaft 13 outward.

When replacing the recording needle 9, first remove the holder 1 from the shaft as described below, and then remove the dowel pin 14.
When the support plate 12 is pushed inward against the acting force of the spring 15, the support plate 12 is pushed outward as the support shaft 13 slides, and the clamping state is released.

In this state, if the recording needle 9 is replaced and the finger pressure is released, the dowel pin 14 will return to its current state due to the expanding pressure of the spring 15, and the support plate 12 will also return to its original clamped position to support the new recording needle. do.

After that, the replacement is completed by fixing the holder 1 to the shaft again.

Further, in the figure, 16 is a pin protruding from the lower surface of the holder 1, which is inserted into a pin insertion hole 18 provided in the shaft 17 of the needle rest to prevent the holder 1 from coming off from the shaft 17 and to position it. It is for.

Therefore, in order to fix the holder 1 to the shaft 17,
The clamping spring 5 of the holder 1 is pushed open, and the shaft 17 is press-fitted between the spring 5 and the clamping part 4.

At this time, the holder 1 can be securely fixed to the shaft 17 by inserting the pin 16 into the pin insertion hole 18 of the shaft 17.

In addition, the holder 1 can be easily removed from the shaft 17 by grasping the legitimate child part 3 and pulling it upward.

Note that the present invention is not limited to the above embodiments,
For example, it is not necessary to fix the knock pin 14 to the support shaft 13; in that case, it is necessary to make the end of the support shaft 13 project outward from the holder 1, and to provide a spring receiver in the middle.

Since the present invention has the above-mentioned structure, there is no need to turn a screw each time the recording stylus is replaced, such as when tightening a screw, and the recording stylus support plate is lifted up against the spring, and in this state, a new record can be recorded. When the needle is replaced and released, the recording needle is held again by the spring, so it is extremely easy to change the recording needle, and the efficiency of the replacement work can be significantly improved.

Further, there is no fear that the recording needle will fall out inside the machine, and various problems associated with this can be prevented, and it can be provided at a low price like conventional recording needles.

Therefore, the present invention has many practical uses and benefits.

[Brief explanation of drawings]

Figures 1 to 3 are perspective views for explaining an example of a conventional device, Figures 4 to 6 are examples of a recording stylus support device according to the present invention, and Figure 4 shows a rotating recording stylus holder. FIG. 5 is a sectional view taken along line II in FIG. 4, and FIG. 6 is a perspective view of the recording stylus when it is removed from the shaft. DESCRIPTION OF SYMBOLS 1... Recording needle holder, 2... Recessed part, 3... Heirloom part, 4... Holding part, 5...
... Clamping spring, 6 ... Positioning protrusion, 7 ... Small hole, tail ... Dowel pin insertion hole, 9 ... Recording needle , 12... Recording needle support plate, 13... Support shaft, 14... Dowel pin, 15... Spring, 16...
Pin, 17...Shaft, 18...Zen insertion hole.

Claims (1)

[Scope of utility model registration request] The recording needle holder 1 has a recess for attaching the recording needle to the front surface 1a of the recording needle holder 1, which can be attached to and detached from the shaft 17 of the needle rest, and the shaft 17 is press-fitted into the clamping part 4 and the clamping spring 5. A notch 2 is provided, and a dowel pin 14 is fixed to the concave notch 2, which is slidably inserted into the recording needle holder 1 and protrudes from the recording needle holder 1 at the end opposite to the recording needle support plate. A recording stylus support plate 12 is disposed to support the recording stylus via a support shaft 13, and the support shaft 13 of the recording stylus support plate is supported by a spring 1 installed in the recording stylus holder 1.
A recording needle support device in a mimeograph paper plate making machine, etc., which is constantly biased in the direction in which the recording needle support plate 12 is held via the recording needle support plate 12.