JPS6217248Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a recording stylus holding device for mounting and supporting a recording stylus in a facsimile plate making machine.

More specifically, the recording needle holder, recording needle presser,
The present invention relates to a simple recording stylus holding device for a plate-making machine that allows the recording stylus to be easily attached and removed with a one-touch operation using a combination structure of presser springs.

FIG. 4 shows a conventional recording needle holding device. A bracket 2 is placed on the needle pedestal 1 of the scanning table facing an original such as an offset master plate wrapped around a drum.
is vertically fixed and erected, and a support shaft 4 is attached to the upper part of the bracket 2 by a needle bearing 3. A recording needle holding device 5 is provided at the tip of the support shaft 4 . A slit hole 6 is formed in the center of the recording stylus holding device 5, through which the recording stylus is inserted in the vertical direction in the figure. A push member for fixing the inserted recording needle 7 is provided inside the slit hole 6, and a screw 8 for moving the push member is attached to the outside. The recording needle 7 is inserted into the slit-shaped hole 6 and fixed with a screw 8. When the recording needle 7 is used for plate making, the support shaft 4 rotates 90 degrees, the recording needle 7 takes a horizontal position, comes into contact with the original plate wound around the drum, and the needle 7a discharges electricity to make the plate.

The conventional holding device for the recording stylus 7 described above has a mechanical structure, and after the recording stylus 7 is inserted into the hole 6 and set, it must be tightened with the screw 8, which is time-consuming, and especially in plate-making machines, the stylus 7 is difficult to hold. Since the recording stylus 7a wears out in a short time and the recording stylus must be replaced frequently, it has been desired to simplify the method for attaching and removing the recording stylus of the recording stylus holding device.

The present inventor has devised the present invention in view of the above-mentioned needs and to effectively satisfy them.

The purpose of this invention is to be able to be constructed with a small number of parts such as a recording stylus holder, a recording stylus presser, and a presser spring, and to enable the recording stylus to be easily attached and removed with a one-touch operation by simply inserting and pulling out the recording stylus. Provided is a recording needle holding device for a plate making machine.

A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a partially sectional plan view showing the vicinity of a recording stylus holding device according to the present invention, and FIG. 2 is a front view thereof.
Note that the same reference numerals are used for the same parts as in the conventional example. That is, 1 is a needle pedestal facing the drum of a facsimile plate-making machine and provided on a scanning table;
A bracket 2 is fixed to the needle pedestal and supports the recording needle holding device.

The recording needle holding device 10 is attached to one end of a support shaft 4 provided at the upper part of the bracket 2. The holding device 10 includes a recording needle holder 11 and a recording needle presser 12.
and a presser spring 14. The recording needle presser 12 is housed in the recording needle holder 11, and is elastically fixed by applying a presser spring 14 to the curved portion 12d. Projecting walls 11 are provided on both sides of the recording needle holder 11.
a and 11b are integrally formed, and the protruding wall 11b on the bracket 2 side is provided with a cylindrical bearing portion 11c into which the end of the support shaft 4 is fitted.

Recording needle holder 1 is located in the center of the recording needle holding device.
1 and the recording needle holder 12 form an insertion hole _S1 having an elliptical cross section and penetrating vertically. The flat recording stylus 13 is clamped at contact portions A, A between the recording stylus holder 11 and the recording stylus presser 12.

FIG. 3 shows an exploded perspective view of the recording needle holding device.

Parallel protruding walls 11a and 11b are formed on both sides of the recording stylus holder 11 with an interval between them, and a concave groove 11e curved outward and having a substantially semicircular cross section is formed inside the wall portion 11d between the protruding walls in the longitudinal direction. Form. Concave groove 11
Plane portions 11f, 11f having a constant width are formed between e and both protruding walls 11a, 11b. The above shapes are integrally formed. Furthermore, protruding walls 11a, 11b
Two opposing holes 11g are formed in the rear part of each of the holes.

The recording needle presser 12 has a concave groove 12a formed over the entire length in the longitudinal direction on the surface facing the recording needle holder 11, and the length in the longitudinal direction is approximately equal to that of the recording needle holder 11.
Flat portions 12b, 12b having a constant width are formed on both sides of the groove 12a to match the length of the groove 12a. The flat portions 12b, 12b are formed to have the same width as the flat portions 11f, 11f formed on the recording stylus holder 11.
When setting the recording needles, the recording needles 13 are pressed and fixed between these flat portions. The recording needle presser 12 is formed with upper and lower walls 12c and 12c, respectively.

The recording needle 13 has a discharging needle 13a at its tip for making an original such as an offset master plate wound around the drum, and has a wide wing portion 13b formed in the same plane at its upper end. A weight body 13c, such as a rivet, is attached to the tip side of the recording needle 13 to suppress vibrations generated during plate making.

The presser spring 14 is formed by bending a linear spring material into a U-shape.

Next, a method for assembling the holding device and a method for attaching and detaching the recording needle will be explained.

Between the protruding walls 11a and 11b of the recording stylus holder 11 rotatably supported on the support shaft 4, there is a concave groove 11e of the recording stylus holder 11 and a concave groove 12 of the recording stylus presser 12.
The recording needle holder 12 is fitted and attached so that a is opposed to the recording needle holder 12. At this time, the flat part 11 of the recording needle holder 11
f, 11f and the flat part 12b, 1 of the recording needle holder 12
2b are in contact with each other. Next, in order to elastically support the outside of the protruding curved portion 12d of the recording stylus presser 12, the presser spring 14 is inserted into the holes 11g, 11g of the protruding wall 11b, and the presser spring 14 is inserted into the hole 11g of the other opposing protruding wall 11a.
Insert and engage the tips of the linear presser springs 14 to g and 11g. In this way, the recording needle holding device 10 is assembled.

The recording needle 13 is inserted from the B direction of the holding device 10 into the gaps A and A between the contact portion where the recording needle holder 11 and the recording needle presser 12 come into contact. This insertion operation is possible due to the elastic action of the presser spring 14. In the longitudinal direction of the central part of the holding device 10, there are recesses 1 in each of the recording needle holder 11 and the recording needle presser 12.
1e and 12a form an insertion hole S ₁ with an elliptical cross section.
, the recording needle 13 inserted from direction B can be easily inserted even if there are weight bodies 13c, 13c. When the recording needle 13 is inserted into approximately the predetermined position, the wing portion 13b is inserted into the holding device 1.
0, and the position of the recording needle 13 is determined.

Furthermore, when removing the recording needle 13, it can be removed by pinching the wing portion 13b at the rear end of the recording needle 13 and pulling it upward. stick together by force.

As described above, the recording stylus 13 can be attached and removed by simple insertion and withdrawal operations, and can be done in an extremely short time.

As is clear from the above explanation, according to the present invention,
In order to securely hold the recording stylus through the elastic clamping between the recording stylus holder and the recording stylus presser, it is a simple operation of inserting or pulling it out from one side of the recording stylus holder into the clamping gap. The recording needle can be attached and removed using the . In particular, since the operation of inserting and pulling out the recording needle can be performed in an extremely short time, it is very convenient in a plate-making machine where the recording needle is replaced repeatedly. In addition, the recording needle holding device is composed of three parts: a recording needle holder, a recording needle presser, and a presser spring, and is elastically fixed by the elastic force of the presser spring, so it is very easy to assemble and disassemble. It is extremely useful as it is easy to manufacture and convenient for repair and maintenance.

[Brief explanation of the drawing]

The drawings relate to one embodiment of the present invention, and FIG. 1 is a plan view of the recording needle holding device in cross section, FIG. 2 is a front view of the same, FIG. 3 is an exploded perspective view of the device, and FIG. FIG. 2 is a perspective view of a conventional recording needle holding device. In the drawing, 11 is a recording needle holder, 11a, 1
1b is a protruding wall, 11e and 12a are grooves, 12 is a recording needle presser, 13 is a recording needle, and 14 is a presser spring which is an elastic member.

Claims (1)

[Scope of Claim for Utility Model Registration] A recording stylus holding device for a plate making machine that holds a plate-shaped recording stylus with a discharge needle at its tip for making an original plate such as an offset master plate wrapped around a drum, the cross section of which is omitted. A concave groove is formed by leaving a pair of flat parts between the protruding walls of the U-shaped recording stylus holder, and a concave groove opposite to the concave grooves is formed in the recording stylus holder having a flat part that comes into contact with the flat part. A recording stylus with a weight at its tip is interposed between the flat surface of the recording stylus holder and the flat surface of the recording stylus holder, and a recording stylus is provided between the protruding walls of the recording stylus holder. A recording needle holding device for a plate making machine, characterized in that a spring for elastically holding the recording needle holder is inserted and locked.