JPS6342105Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is for thinly cutting various kinds of leather (including leather-like products such as synthetic resin and rubber) used for shoes, bags, bags, belts, etc. This invention relates to a leather pressing device for a leather skiving machine used for.

[Prior art] In conventional leather skiving machines, when sending leather to be processed to the knife side, the edge of the leather is positioned by applying it to the tip of a positioning ruler, and then the leather is shaped into a cylindrical shape by a feed roller. The leather is fed between the knife and a presser foot placed on the outside of the knife's edge. However, in the conventional leather skiving machine, as shown in Fig. 7, the leather B applied to the positioning ruler A is
During the process in which the edge of the leather B is forcibly fed at a high speed by the feed roller, the leather B often rises toward the positioning ruler A or wrinkles as shown by the imaginary line C. In many cases, the leather is cut in a vine state, and in that case, the leather is not skived accurately, resulting in, for example, making holes in the leather.
Furthermore, if the edge of the leather rises even slightly onto the positioning ruler A, there is also the problem that the skiving width becomes inaccurate and the finish is not neat.

This phenomenon is particularly noticeable when skiving highly flexible leather. It is necessary to feed the material while holding it with the tips of the fingers, but the worker must use one hand for this holding, which is difficult and requires skill.

In addition, the place to press with the tip of your finger is very close to the knife edge which is rotating at high speed, so you have to work while feeling psychologically scared. Furthermore, depending on the length, size, or shape of the leather, it may be necessary to grasp the leather with both hands, in which case the edges of the leather cannot be held down with the tips of the fingers.
Leather breakage accidents as described above are likely to occur.

[Purpose of the invention] The purpose of the invention is to improve the above-mentioned drawbacks of the conventional technology, and to create a safe and efficient workpiece in which the edge of the leather can be elastically pressed by a pressing part in place of the fingertip. An object of the present invention is to provide a leather pressing device for a leather skiving machine.

[Summary of the invention] The gist of the invention to achieve the above objectives is as follows:
a guide tube fixed to the tip of a positioning ruler to which the edge of the leather to be cut is applied; a presser bar that is slidably inserted into the guide tube and presses the edge of the leather with a rounded tip; An adjustment knob connected to the presser rod via a threaded rod and provided at the upper part of the guide tube for adjusting the amount of protrusion of the presser rod from the lower end of the guide tube; This is a leather pressing device for a leather skiving machine characterized by having a spring that elastically presses a rod downward.

[Embodiments of the invention] The invention will be explained in detail based on the embodiments shown in FIGS. 1 to 6.

1 and 2, a cylindrical knife 1 rotates at high speed, a barrel-shaped feed roller 2 disposed at a slight interval on the inner surface of the knife edge 1a of the cylindrical knife 1, and a barrel-shaped feed roller 2 disposed on the outside of the knife edge 1a. The presser foot 3 arranged at an adjustable interval and the soundproof plate 4 provided inside the cylindrical knife 1 are members commonly used in conventional leather skiving machines.
The leather 5 fed by the feed roller 2 is skived by the cylindrical knife 1 to a thickness corresponding to the distance between the knife edge 1a and the presser foot 3, and the scraped skin 5a is scraped between the knife edge 1a and the feed roller 2. It is also well known that the object falls downward through the gap between the object and the object.

The leather 5 to be processed is placed on a guide plate 6 shown in FIG. 2, and inserted with its edge against the tip of a positioning ruler 7 as shown in FIG. Thereafter, it is sent to the cylindrical knife 1 side by the feed roller 2, and in this embodiment, a pressing part 8 is provided near the tip of the positioning ruler 7.

3 and 4 show a case where the pressing part 8 is attached to the tip of a conventionally used positioning ruler 7, and FIG. 5 shows an example of the internal structure of the pressing part 8. In this pressing part 8, a presser bar 10 made of a slippery material such as Teflon is slidably inserted into a guide tube 9 made of metal or synthetic resin, and is constantly pushed downward by an internal spring 11. While being pressed, the threaded rod 12 connected to the presser rod 10 is operated by the adjustment knob 13,
The amount by which the presser bar 10 projects from the lower end of the guide tube 9 can be adjusted. And leather 5
In order to smoothly feed the presser rod 10, a tapered portion 10a is formed at the tip of the presser rod 10, which is slightly rounded on the insertion side. In this case,
The threaded rod 12 and the adjustment knob 13 are integrated, and the lower end of the threaded rod 12 is threaded into a female thread 14 provided on the presser bar 10, and a vertical groove provided on the presser bar 10 is used to prevent the presser bar 10 from rotating. 15 is fitted with the tip of a screw 16 screwed into the guide tube 9.

FIG. 6 shows the pressing part 8 of another embodiment, in which the presser bar 10 and the threaded rod 12 are integrated, and the threaded rod 12 is screwed into the screw hole provided in the adjustment knob 13. A convex portion 17 provided on the presser bar 10 to prevent rotation is fitted into a vertical groove 18 provided on the inner surface of the guide tube 9. As in the case of FIG. 5, the adjustment knob 13 also serves as a stopper for the presser bar 10.

Furthermore, in the embodiment, in order to make it easier to operate the adjustment knob 13, the axis of the pressing part 8 is attached and adjusted with the axis slightly inclined with respect to the horizontal upper surface of the positioning ruler 7, as shown in FIG. The knob 13 is moved a little further away from the presser foot 3, and the presser bar 10 is positioned as close to the tip of the presser foot 3 as possible. Note that it is preferable that the gap between the positioning ruler 7 and the presser bar 10 be extremely small so that the leather 5 does not get into the gap, and that the presser bar 10 move along the positioning ruler 7.

When actually operating, adjust the distance between the presser foot 3 and the knife edge 1a to set the skiving thickness.
After adjusting the amount of protrusion of the presser bar 10 in accordance with the thickness of the leather 5 by operating the adjustment knob 13, the cylindrical knife 1 and the feed roller 2 are rotated. Then, place the edge of the leather 5 against the tip of the positioning ruler 7 to position it, and then press the leather 5 onto the presser bar 1.
When the leather 5 is slid downward, the edge of the leather 5 is pressed down by the presser bar 10 and transferred to the feed roller 2.
is sent towards the knife edge 1a, and the second
As shown in the figure, the scrap skin 5a is cut to a thickness corresponding to the distance between the presser foot 3 and the knife edge 1a, and the scraped skin 5a falls from between the knife edge 1a and the feed roller 2.

In the embodiment, the tip end 10a of the presser bar 10 is tapered, and the presser bar 10 is prevented from rotating in order to restrict its orientation. If the directionality is eliminated, it is not necessarily necessary to prevent the presser bar 10 from rotating. Further, in the embodiment, a case is shown in which the pressing part 8 is attached to the existing positioning ruler 7, but the positioning ruler 7 and the pressing part 8 may be integrally configured.

[Effects of the invention] As explained above, the leather pressing device of the leather skiving machine according to the invention uses the pressing part to elastically press the edge of the leather, which in the past was held by the operator with the fingertips. This eliminates the need for the worker to press the leather with his fingertips, allowing him to work more efficiently. Furthermore, since the work of pressing the edges of the leather is done mechanically, even unskilled workers can finish it accurately, and there are fewer accidents that could damage expensive leather as in the past. Furthermore, since the worker does not have to hold his/her hand near the knife that rotates at high speed, the worker can work safely and eliminate psychological fear.

[Brief explanation of the drawing]

Drawings 1 to 6 show an embodiment of the leather pressing device for a leather skiving machine according to the present invention, in which FIG. 1 is a front view, FIG. 2 is a side sectional view, and FIG. 3 is a front view of the main parts. , FIG. 4 is a right side view of the main part, FIGS. 5 and 6 are sectional views of the pressing part, and FIG. 7 is an explanatory diagram of the operation of the conventional mechanism. 1 is a cylindrical knife, 1a is a knife edge,
2 is a feed roller, 3 is a presser foot, 5 is leather, 6 is a guide plate, 7 is a positioning ruler, 8 is a pressing part, 9 is a guide tube, 10 is a presser bar, 11 is a spring, 12
13 is a threaded rod, and 13 is an adjustment knob.

Claims (1)

[Scope of utility model registration request] a guide tube fixed to the tip of a positioning ruler to which the edge of the leather to be cut is applied; a presser bar that is slidably inserted into the guide tube and presses the edge of the leather with a rounded tip; An adjustment knob connected to the presser rod via a threaded rod and provided at the upper part of the guide tube for adjusting the amount of protrusion of the presser rod from the lower end of the guide tube; A leather pressing device for a leather skiving machine, comprising a spring that elastically presses a rod downward.