JPH0342170B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention mainly relates to improvements in a rotary clipper used for cutting veneer veneers (hereinafter referred to as veneers).

A conventionally known rotary clipper consists of a rotary blade having a rotation axis and an anvil roll serving as a blade receiver for the rotary blade, and the rotary blade extends parallel to the rotation axis of the rotary blade. However, an anvil roll was also arranged parallel to the rotary blade and its rotation axis.

However, in the above-mentioned conventional rotary clipper, when the rotary blade cuts the veneer on the anvil roll, the rotary blade starts and completes the cutting of the veneer simultaneously over the entire length. The maximum resistance was high, which required a large-capacity clutch brake, a power supply mechanism such as a motor, and highly rigid anvil rolls and rotating blades.

In addition, recent changes in the wood industry have tended to increase the cutting resistance of veneer, and as a result, the conventional rotary clippers mentioned above have also gradually become larger, and the rotary blades used at high speeds and high frequency It is becoming extremely difficult to control the operation of the

The present invention aims to reduce the maximum value of cutting resistance by simple improvement of such a rotary clipper, thereby reducing the size of the device and facilitating operation control. The following is an explanation based on the drawings.

FIG. 2 and FIG. 3 are a plan perspective view and a side view of the rotary clipper according to the embodiment, and as is clear from the figures, the rotary clipper according to the present invention has a rotary blade 4 having a rotary shaft 5; , and an anvil roll 2 as a blade holder, which is provided substantially parallel to the rotation axis 5 of the rotary blade 4, and the anvil roll 2 is arranged in a twisted relationship with the rotation axis 5. It is characterized by In this case, the depth at which the rotary blade 4 bites into the anvil roll 2 tends to lack uniformity, but this tendency is acceptable in practice in relation to the deflection of the anvil roll 2. If necessary, it is also possible to set the biting depth as desired by forming the anvil roll 2 into an inverted crown shape (a shape with a smaller diameter at the center in the longitudinal direction of the roll). .

In any case, when cutting a veneer on an anvil roll with the rotary clipper of the present invention constructed as described above, as is clear from FIGS. 2 and 3, the rotary blade 4 is cut from one end. The start and completion of cutting gradually progresses toward the other end, resulting in the effect that the maximum value of cutting resistance during cutting becomes an extremely low value, and according to experiments, the anvil roll 2 is rotated. The maximum value was halved by simply twisting it about 2 degrees to the shaft 5.

In addition, when using such a rotary clipper for various cutting processes of veneer, as shown in Figure 1,
It is important to install the rotary blade 4 with reference to the extending direction of the rotary blade 4 during cutting. That is, in the illustrated example, the veneer 1 being conveyed in the direction of the arrow is to be cut on a line perpendicular to the direction; in such a case, the anvil roll 2 is moved The rotary blade 4 is installed so that it can cut on a line perpendicular to the conveyance direction, offset from the direction perpendicular to the conveyance direction.

In addition, normally, the rotary blade 4 in this type of clipper
The structure is attached to a clipper beam 3 that determines its rotation axis 5, and the rotary blade 4 itself is often formed of a thin blade, and when used for continuous cutting, it is constantly rotated. However, it may also be rotated intermittently at appropriate times. In any case, the rotary clipper of the present invention can be applied not only to the above-mentioned veneer, but also to cutting sheet-like objects and plate-like objects made of desired materials such as various plastic boards, papers, leathers, and the like.

Further, in the present invention, the rotary blade 4 is connected to the rotary shaft 5.
Basically, they are arranged parallel to each other, but they can also be arranged with a somewhat twisted relationship. for example,
In FIG. 3, within the range where the anvil roll 2 functions as a blade receiver, the rotary blade 4 has a somewhat twisted relationship with respect to the rotating shaft 5, whether in a spiral curve shape or a straight line shape. You may prepare. That is, a considerable tolerance range is allowed for the degree of parallelism between the rotary blade 4 and the rotary shaft 5.

As mentioned above, the rotary clipper of the present invention can significantly reduce the maximum value of cutting resistance, so it can be made smaller and lighter, and the cutting operation can be easily controlled, making it suitable for various industries that use this type of cutting process. It is great to contribute.

[Brief explanation of drawings]

FIG. 1 is a plan view of an example in which the embodiment device is applied to cutting a veneer 1, FIG. 2 is a plan perspective view of the embodiment device,
Figure 3 is a side view of the same, and in the figure, 1... veneer,
2... Anvil roll, 3... Clipper beam, 4... Rotating blade, 5... Rotating shaft...

Claims (1)

[Claims] 1. In a rotary clipper consisting of a rotary blade having a rotating shaft and an anvil roll as a blade receiver, the rotary blade is provided to extend substantially parallel to the rotating shaft, and the anvil roll is connected to the rotating shaft. A rotary clipper characterized by being arranged and configured to have a torsional relationship with the shaft.