JPS5813286B2 - Sleater round blade fixing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fixing device for a round blade of a slitter that slits a strip, and an object thereof is to provide a device for fixing the round blade to an arbor shaft without using a spacer. .

Normally, when slitting a thin strip plate, there are two methods: the so-called normal slitting method, in which the upper and lower round blades are sheared by slightly lapping each other, and the other is the so-called normal slitting method, in which the upper and lower round blades are sheared by slightly lapping, and the slitting method is performed by stopping the wrapping between the upper and lower round blades and cutting the material to be slit. There is a so-called roll slitting method in which shearing is stopped in the middle of shearing with the upper and lower distances of the round blades open by about 20% of the plate thickness, and in the next step, the material is passed between flat rolls to break and separate from the mid-shearing part.

The latter method has the advantage that burrs do not occur on the sheared surface compared to the former method.

However, in this type of slitter, spacers are interposed between the round blades, although there are differences in structure and shape.

When a spacer is used, it has various defects as described below.

First, depending on the type of spacer, it is necessary to have a large number of spacers on hand, which increases costs and increases the labor burden due to the handling of a large number of spacers.

Secondly, in the roll slitting method, it is necessary to keep the gap between the upper and lower round blades in the range of 20% ± 10% of the plate thickness. Very difficult to adjust.

This means that if the diameter of the arbor shaft is about 150mmφ, if the arbor shaft is cut into multiple strips, the arbor shaft will become 1/1 due to the shearing reaction force.
This is because the deflection occurs on the order of 0.00 mm, making the gap adjustment described above difficult.

For this reason, it is necessary to back up the arbor shaft, but there is usually a difference of about 3/100 mm between the outer diameter of the arbor shaft and the inner diameter of the spacer from the viewpoint of workability during insertion. There is an eccentricity between the spacer and the arbor axis, and if backup is performed through part of the spacer, the backup force will not be constant.

There are various problems with using spacers in this way.

In view of the above points, the present invention provides a device that can accurately and easily fix a round blade to an arbor shaft without using a spacer.

As a result, according to the present invention, there is no need for a spacer, making it possible to save costs and reduce labor.

In particular, in the roll slitting method, it is possible to eliminate the fluctuation factors of the gap in the circumferential direction of the round blade, and it also enables direct backup to the arbor axis, making it easy and stable to adjust the gap between the upper and lower round blades, and shearing smoothly. This has the effect of making it possible to perform

The present invention includes accompanying inventions as specific inventions, the details of which will become clear from the following examples.

FIGS. 1A and B are embodiments corresponding to the specific invention of the present invention, FIGS. 2A and B are embodiments corresponding to the second invention, and FIGS. 3A,
B shows an example of a backup mechanism for each of the slitters shown in FIGS. 1 and 2.

In Figs. 1 and 2, 1 indicates an arbor shaft, and 2 indicates a round blade.

First, referring to FIGS. 1A and 1B, the inner diameter 3 of the round blade 2 is made larger than the outer diameter 4 of the arbor shaft 1 by an arbitrary length, and an inclined surface 5 is formed.

Reference numeral 6 denotes a collar, which is inserted between the outer circumferential surface of the arbor shaft 1 and the inner circumferential surface of the round blade 2, and a screw thread γ is carved on the outer circumferential surface of the collar 6 in the right half of the figure. Round blade 2 on the left half
An inclined surface 8 is formed which is inclined in the same direction as the inclined surface 5 formed on the inner diameter.

9 is a nut screwed onto the threaded portion 7 of the collar 6.

With such a configuration, the nut 9 in FIG.
When rotated, the round blade 2 is pushed to the left and tilts both sides 5,
8 coincide with each other, the collar 6 acts in the direction of contraction, and the collar 6 and the arbor shaft 1 also come into close contact with each other.

Further explaining FIGS. 2A and 2B, a thread 22 is provided on the outer peripheral surface of the collar 10, and a thread 22' is provided on the inner peripheral surface of the pair of rings 13 and 14. Another feature is that several engagement portions for rotating the ring, such as holes 23, are bored.

Therefore, in FIG. 3B, if the pair of rings 13 and 14 are rotated in the direction in which they approach each other, the inclined surfaces 15 and 17 of the pair of rings 13 and 14 and the V-shaped inclined surface 12 of the round blade 2 will be formed. The ring 10 and the arbor shaft 1 are tightly and closely fixed together due to the contraction of the ring 10.

At this time, the spacing between the round blades 2 and 2' in each of the figures A can be set using an appropriate spacing setting jig.

Next, the backup mechanism of the arbor shaft adopted in the roll slitting method 1 with reference to FIGS. Arbor shaft 1a
, Ib are installed and perform an intermediate process (bending) of shearing the strip 26 with a predetermined width o27a, 27b and 27c, 2
7d is a roller 2 that contacts the arbor shafts 1a and 1b, respectively.
9 and a handle 30 for position adjustment.

The relationship between the arbor axis and the roller is as shown in Figure 4B.
2 rollers 24. 29 is in contact with the arbor shaft 1.

According to this example, there is no need to fit a spacer on the arbor shaft 1 as in the conventional case, and the outer circumferential surface of the arbor shaft can be directly backed up. The problem of deflection when using a shaft can be solved.

As described in detail above, according to the present invention, a slitter can be obtained that does not require a spacer at all, and various difficulties when using a spacer can be effectively avoided.

Furthermore, especially in the case of the roll slitting method, by omitting the spacer, it is possible to directly back up the arbor shaft, which prevents the slitter's shaft from being deflected temporarily due to the relatively small diameter arbor shaft, and improves the shear load. This can contribute to preventing burrs.

Therefore, the present invention greatly contributes to the work of slitting strips.

[Brief explanation of drawings]

The drawings show embodiments of the present invention, and FIGS. 1A and B are partial views and enlarged views of essential parts showing the first invention of the present invention, and FIGS. 2A and B
are a partial view and an enlarged view of main parts showing the second invention of the present invention, and the third
Figure A is an explanatory diagram of the backup mechanism of the slitter, and Figure 3B is a partially enlarged sectional view of the same. 1 is the arbor shaft, 2 is the nine blades, 6 is the collar, 9 is the nut,
10 is a collar, 13 and 14 are a pair of rings, 21 is a bolt, 24 is a traveling carriage, 25 is a housing, 26 is a strip, and 27a, 27b, 27c, and 27d are backup devices.

Claims (1)

[Scope of Claims] 1. An arbor shaft, a round blade having an inner diameter larger than the outer diameter of the arbor shaft and whose inner peripheral surface is an inclined surface, an outer peripheral surface of the arbor shaft, and the round blade. The collar has a threaded portion on its outer peripheral surface and an inclined surface that rises in the direction away from the threaded portion, and a nut is screwed onto the threaded portion. A round blade fixing device for a slitter. 2 The arbor shaft, the outer circumferential surface of the collar having an inner diameter slightly larger than the outer diameter of the arbor shaft, and the inner circumferential surface of the pair of rings form a plane parallel to the axial direction of the arbor shaft, and each has a screw thread. The outer circumferential surfaces of the pair of rings are upwardly sloped outward and contact the V-shaped inclined surface of the inner circumferential surface of the round blade, and the collar and the ring are screwed together. A round blade fixing device for a slitter, characterized in that an engaging part for ring rotation is provided on the outer surface of the slitter.