JPS5852809B2 - Tampanno Setsakuhouhou - Google Patents

Description

[Detailed description of the invention] The present invention relates to cutting veneers.

Normally, veneers are cut from logs by using a pressure body such as a continuous integral nose bar to apply pressure to the log in front of the cutter while cutting the veneer with the cutter.

That is, in the case of veneer lace, for example, as shown in FIG. 1, a rotating log 1 is pressed by a continuous nose bar 2 and a cutter 3 is used to cut the veneer.

As a result, the cut veneer 4 has back cracks 5 as shown in FIGS. 2 and 3, and the cracks are generally continuous from one end to the other end in the fiber direction. It is.

Moreover, the depth of the back side 5 is usually about 2 times the thickness of the veneer 4.
/3, the strength of the veneer 4 in the direction perpendicular to the fibers is reduced, causing the veneer to tear while being handled by the operator, resulting in a decrease in the finish of the product and a decrease in quality.

Further, the veneer 4 causes a curling phenomenon in which it turns into a cylindrical shape due to plastic deformation with the surface with the back crack 5 facing outward, and the occurrence of the back crack 5 further aggravates this phenomenon.

Therefore, in the veneer processing process, it is necessary for the operator to unroll each veneer one by one, resulting in poor work efficiency and difficulty in saving labor.

In the present invention, when cutting a veneer, the pressurizing state of the raw wood by a pressurizing body is changed at every arbitrary width in a direction approximately perpendicular to the veneer cutting direction, thereby preventing back cracks that occur during cutting. This method solves the above-mentioned drawbacks intermittently, and will be explained below using examples.

As shown in FIGS. 5 and 6, in the veneer lace A, a roll 6 having a protrusion on the circumferential surface as shown in FIG. 4 is rotatably provided on the support part 7 instead of a normal nose bar. A plurality of pressurizing bodies are arranged at arbitrary intervals in the axial direction of the log 9, so that there are areas on the surface of the log 9 that are pressurized and areas that are not pressurized.

Further, each support part T is provided on a fixed base 8 via a spring 10 so as to be movable back and forth, and furthermore, the cutter 11 and the fixed base 8 move toward the axis of the log 9 in relation to the rotation of the log 9. A gear (not shown) is used to do this.

Note that the log 9 is held and rotated by a chuck (not shown).

For example, the present invention is provided as described above, and its operation is as follows.

When the log 9 is rotated by the chuck, the fixed base 8 and the blade 11 approach the log 9, and cutting of the veneer is started.

At this time, each roll 6 rotates while pressurizing the log 9 while cutting is performed by the cutter 11.

The cut veneer 12 develops back cracks 13, but because the force applied to the raw wood 9 during cutting is different between the part where the roll 6 acts and the part where it does not act, the way the back crack 13 occurs is different, as shown in FIG. In addition, intermittent back cracks 13 are formed that are not continuous from one end to the other end in the fiber direction.

Therefore, the strength of the veneer 12 in the direction perpendicular to the fibers is not thicker than that of the veneer 4 cut by the conventional method, and it is not likely to tear while being handled by the operator, improving the finish. This greatly contributes to quality improvement.

Also, in the curling phenomenon of veneer, the curling phenomenon is promoted in the part where the back crack 13 exists intermittently, but the curl phenomenon is promoted in the part where the back crack 13 exists intermittently
In order to prevent the curl phenomenon in the part where there is no 3, curl it <<
In the subsequent processing process, there was no need for workers to spread it out, and it was only necessary to transport it to the processing equipment on a conveyor, making it possible to become a famous sword.

Furthermore, cracks are intermittently formed on the front side of the veneer 12 due to the protrusions of the roll 6, so that the shape becomes even more flat.

The present invention has been described above with reference to one embodiment, but in the above embodiment, the distance between the rolls 6 is sandwiched, and the spring 1 is
Even if the pressure applied to the raw wood 9 by the rolls 6 is varied and cutting is performed by changing the strength of the 0, cracks in the back occur intermittently.

Further, as an example of the pond, as shown in FIG. 8, the same result can be obtained even if cutting is performed while the location where the log 9 is pressed by the sea urchin roll 6 is alternately changed in the axial direction of the log 9.

Although a roll is used as the pressurizing body, a conventional nose bar may be divided into arbitrary widths and supported by springs, for example, as in the above embodiment.

[Brief explanation of the drawing]

The drawings show a conventional veneer cutting device and an example of the present invention. Figure 1 is a perspective view of a conventional veneer lace, Figure 2 is a partial plan view of a veneer, and Figure 3 is a partial diagram of a veneer lace. Side view of figure 2, 4th
The figure is a side view of the roll 6, FIG. 5 is a plan view of an embodiment of the present invention, FIG. 6 is a side view of FIG. 5, FIG. 7 is a plan view of a veneer, and FIG. 8 is a plan view of another embodiment. FIG. 3 is a side view of a device in which the location of pressurizing logs has been changed. 6...Roll, 9...Log, 10...
...Sufling, 11...Knife, 12...
...Single board, 13...Cracked on the back.

Claims (1)

[Claims] 1. When cutting a veneer with the cutter while pressing the raw wood with a pressurizing body in front of the cutter, the pressure by the pressurizing body can be applied to the pressurizing force or A veneer cutting method characterized by cutting with different pressure points.