JPH0222236Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a razor cutter device for a slitter that uses a razor blade to cut a raw sheet into a predetermined width by cutting with a grooved lower blade or cutting in the air. It is related to.

[Conventional technology]

The method of cutting the raw sheet with a razor blade is frequently used because the device has a simple configuration, the cutting width can be easily changed, and the device is inexpensive.

However, in conventional razor cutter devices, the razor blade is fixedly attached, so the part of the razor blade that cuts the raw sheet remains constant from beginning to end, and as a result, the edge of the razor blade dulls quickly. When the edge of the razor blade becomes dull, the sheet at the cut portion partially melts due to frictional heat and adheres to the razor blade, making the cut end surface of the sheet uneven and deteriorating the appearance of the rolled product.

As you can see, the lifespan of razor blades is short, so
The razor blade had to be replaced frequently, which was a factor in reducing work efficiency.

In view of these problems, the present invention aims to improve the cut end surface of the sheet and extend the life of the razor blade by cutting the raw sheet while swinging the razor blade at a low speed. It was done for a purpose.

[Means for solving problems]

In the present invention, a razor holder fixing shaft is attached parallel to the main shaft via an arm to a main shaft that performs reciprocating rotation movement within a predetermined range by a reciprocating rotation means, and a large number of razor blades are attached to the razor holder fixing shaft. The razor blades are attached at predetermined intervals along the axial direction, and are configured so that the reciprocating rotational movement of the main shaft causes a large number of razor blades attached to the fixed shaft of the razor holder to swing in an arc around the main shaft. This is a distinctive feature of the razor cutter device in the slitter.

[Effect of invention]

The razor blade cuts the raw sheet to a predetermined width while swinging in an arc shape at low speed around the main axis, so the part of the razor blade that cuts the sheet covers a certain range, and the sheet is cut within this range. The part to be cut is repeatedly changed at a predetermined period.

〔Example〕

1 to 6 show an embodiment in which a raw sheet is cut with a grooved lower blade using a razor blade.

Bearings 4 are rotatably supported at both ends of the main shaft 2, and a razor holder fixing shaft 8 is attached to the main shaft 2 via an arm 6 in parallel with the main shaft 2. A large number of leather holders 10 are fixed to the leather holder fixing shaft 8 at the same intervals as the cut width W of the original fabric sheet S.
A razor blade 12 is attached to.

This razor blade 12 fits into the grooves 14 of a grooved lower blade shaft 16 in which a large number of circumferential grooves 14 are provided at regular intervals in the axial direction on the outer periphery of a cylindrical body.

A backing plate 18 is provided at the lower end of one arm 6, a compression spring 20 is in elastic contact with one side of the backing plate 18, and an eccentric attached to the rotating shaft 22 of the motor M is attached to the other side. cam 24
is in contact with the eccentric cam 24, and the contact plate 18 is always in contact with the eccentric cam 24 due to the action of the compression spring 20.

The original fabric sheet S is traveling wrapped around a grooved lower blade shaft 16, and the original fabric sheet S is cut into a set width W by the razor blade 12 that has entered the groove 14 of the grooved lower blade axis 16.

When the motor M rotates at a low speed and the eccentric cam 24 rotates, the main shaft 2 performs a reciprocating rotational movement, and as shown in FIGS. 1 to 3, the razor holder fixing shaft 8 moves within a certain range around the main shaft 2. The razor blade 12 attached to the razor holder 10 of the razor holder fixing shaft 8 swings in an arc together with the razor holder fixing shaft 8.

In the neutral position shown in FIG. 2, the raw sheet S is cut at the part b of the razor blade 12, but at the lower end and the upper end of the razor blade 12, as shown in FIGS. 1 and 3, respectively. As shown, the razor blade 12 is cut at portions a and c. In this way, razor blade 1
2 cuts the raw sheet S to a predetermined width while swinging in an arc shape at low speed around the main shaft 2,
The portion of the razor blade 12 that cuts the raw sheet S covers a certain range (ranges a and c described above), and within this range, the portion that cuts the raw sheet S is repeatedly changed at a predetermined cycle.

In the above embodiment, the main shaft 2 is reciprocated and rotated by the action of the eccentric cam 24, and the razor blade 12 is
Although the main shaft 2 is oscillated in an arc shape, the means for reciprocating the main shaft 2 is not limited to the eccentric cam;
The present invention can also be applied to so-called aerial cutting, in which a raw sheet is cut between book receiving rollers with a razor blade.

[Effect of idea]

This invention cuts the original fabric sheet to a predetermined width while swinging the razor blade in an arc shape at low speed around the main axis, so the contact area between the original fabric sheet and the razor blade is changed periodically. , the blade part of the razor blade can be used over a wide range of areas. For this reason, compared to the conventional cutting method in which the razor blade is fixed, the cut end surface of the sheet becomes more beautiful, increasing the commercial value of the rolled product, and the life of the razor blade is extended, making it easier to replace the razor blade. Become.

[Brief explanation of the drawing]

1 to 3 are side views of the razor cutter device of the present invention in different states, FIG. 1 is a side view of the razor blade 12 reaching the lower end, and FIG. 1
2 is a side view of the state in which the razor blade 12 is in the neutral position, FIG. 3 is a side view of the state in which the razor blade 12 has reached the rising end, and FIG. The plan view shown in FIG. 5 is as follows.
Schematic front view of the razor cutter device of the present invention, No. 6
The figure is a partial cross-sectional view of the grooved lower blade shaft 16 along the axial direction. The explanation of the symbols of the main parts is as follows.
S: Raw sheet, M: Motor, 2: Main shaft, 6: Arm, 8: Leather holder fixed shaft, 10: Leather holder, 12: Razor blade, 16: Grooved lower blade shaft, 24: Eccentric cam (reciprocating rotation) movement means).

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A razor cutter device in a slitter that cuts a raw sheet into a predetermined width using a razor blade, which reciprocates within a predetermined range by a reciprocating rotation means. A razor holder fixed shaft is attached to the moving main shaft via an arm in parallel with the main shaft, and a large number of razor blades are attached to the razor holder fixed shaft at predetermined intervals along the axial direction, so that the main shaft reciprocates. 1. A razor cutter device for a slitter, characterized in that a large number of razor blades attached to a fixed shaft of a laser holder are swung in an arc shape around the main shaft by movement. (2) A razor cutter device in a slitter according to claim 1, wherein the reciprocating rotating means is an eccentric cam.