JPS6216803B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for tenderizing a veneer veneer (hereinafter referred to as veneer) immediately after cutting in veneer lace.

Traditionally, the tenderizing method for veneer is
Although various proposals have been made, most of them are constructed independently of the cutting of logs, and the tenderizing method itself is based on principles that are completely independent of cutting. On the other hand, the main purpose of tendering is to straighten out the curls in the veneer and turn it into a smooth, flat veneer, making it easier and smoother for each process by hand or machinery. It is well known that this is an extremely effective method, including the benefits of small cracks in the drying process and the yield.

The present invention involves tenderizing the veneer while allowing it to exist as a veneer, in connection with the cutting of the raw wood that is the starting point from which the veneer is generated, which could not be obtained using conventional methods. Specifically, according to the method of the present invention, the obtained veneer is generated in a naturally smooth state, and the above-mentioned beneficial effects are exerted in all subsequent steps. becomes.

The present invention will be explained as follows based on the embodiment illustrated in the drawings.

The example shown in FIG.
using the guide member 2 to pierce the portion of the raw wood 6 just before cutting from its outer peripheral surface, and after cutting, to pierce the veneer immediately after cutting deeper into the wedge-shaped pierced body 5. Therefore, it is made by guiding the veneer 4. In this example, the wedge-shaped piercing body 5 is formed on the disc-shaped base material 3, and the wedge-shaped piercing body 5 and the guide member 2 are slightly offset in the direction along the cutting edge of the knife 1. It is equipped with Therefore, both of them take the form of being divided and provided alternately in the above-mentioned direction.

In this way, as shown in the action explanatory diagrams illustrated in FIGS. 2a, b, and c, first, the wedge-shaped pierced body 5 is clearly pierced into the log 6 as shown in FIG. 2a. Then, the starting point of the crack will be generated as a preliminary tender, and then the cutting will be completed and the veneer 4 will be in the state as shown in FIG.
This results in tenderizing by penetrating deeper and enlarging the crack. Of course, after that,
As shown in FIG. 2c, the tendering process is completed by solving the relationship between the veneer 4 and the wedge-shaped prongs 5 by appropriate means. Therefore, as a process, first, before cutting, that is, in the state of raw wood, a crack starting point is created, and after cutting, that is, in the state of a veneer, cracks are generated based on the starting point. Moreover, both the creation of the starting point and the occurrence of cracks are basically
A wedge is driven into raw wood or veneer in the thickness direction, and as a result, it exhibits an extremely stable elongation rate, ensuring uniformity of the tender regardless of the properties of the wood.

Furthermore, good tender processing can also be obtained by configuring as follows to add other effects. That is, the wedge-shaped protrusions 5 are driven to supply some of the power required for cutting. In this way, the wedge-shaped protrusions 5 not only act on the veneer 4 in the thickness direction, but also pull it in the unloading direction, further expanding the crack.
The tender effect becomes more pronounced, but on the other hand, it has the disadvantage that it is relatively more susceptible to the influence of the material. In such a case, the stability can be easily ensured by restricting the drive of the wedge-shaped protrusion. Specifically, when it comes to the core material of raw wood, there is a tendency to apply too much tender, so in order to avoid such a situation, as the diameter of the raw wood becomes smaller, the driving force of the wedge-shaped prongs is reduced. It is sufficient if it can be adjusted like this. Of course, in such a case, the main body of power and supply required for cutting will be another means such as a spindle. The point is that it is in addition to the above-mentioned basics that some appropriate tensile action is given after the veneer is formed.

Conversely, if the wedge-shaped protrusion 5 is driven by the raw wood 6 or the veneer 4 by adding some resistance, so-called driven, the basic As long as the structure is achieved, securing of the tender as described above can be achieved by biting the wedge-shaped protrusion.

An example in which the embodiment illustrated in FIG. 1 is slightly modified, for example, the wedge-shaped piercing body 5 is moved somewhat upward and the guide member 2 is configured to be moved along the rake face of the knife 1 and closer to the cutting edge. However, if this is done, the wedge-shaped protrusion 5 will temporarily tend to separate from the veneer 4 between FIG. 2a and FIG. , if the guide member 2 is configured to provide the effect shown in FIG. 2b, the same results.

Various other examples for carrying out the method of the present application will be described below.

First, regarding the wedge-shaped prongs 5, in addition to those formed on the disc-shaped base material 3 as shown in the drawings, there are also those formed on a plate part such as a chain, or those embedded on an endless belt etc. There are various shapes such as curved shapes, etc., but in short, it is sufficient that the shape is such that it is displaced in the thickness direction of the veneer to enlarge the crack. or,
Regarding these pitches, if the pitches are made finer, they tend to cause more cracks, but on the other hand, when piercing the log, the log is pressed in the radial direction, which tends to cause bending of the log. This may lead to cutting defects. This consideration of bending is the basis of the present application, which is designed to make the piercing into the wood somewhat shallower and deepen it when veneering. For this reason, if the pitch is made finer, it is better to make the piercing into the log shallower than the example shown above.
Furthermore, even when the wedge-shaped piercing body is driven, it is sufficient to make a shallow piercing.

On the other hand, regarding the separation between the veneer and the wedge-shaped pierced body, in some cases the veneer may separate due to its own weight, but it may be separated by the injection of compressed air from inside the wedge-shaped pierced body. Alternatively, as shown in FIG. 3, the peeling plate 7 may be attached from the inside of the piercing body 5 toward the outside. In addition, in this peeling process, it is also effective to use the corner 8 of the guide member 2 to bend it into a rectangular shape and to add a tender. Alternatively, it is possible to bend the peeling plate 7 into a U-shape by the action of only the peeling plate 7.
The degree of application of the tender can be adjusted by adjusting the angle 9. When using this peeling plate, the basic configuration of the present application is not necessarily a necessary condition, and it is effective even when used alone.

As described in detail above, the present invention is extremely effective, and in particular, is an invention expected by the industry to achieve automation after veneer lace, and will make an extremely large contribution.

[Brief explanation of the drawing]

The drawings are illustrated for explaining the present invention, and FIG. 1 is a side view of the embodiment, FIG. 2 is an explanatory view of the operation, and FIG. 3 is a partial side view of the embodiment. In addition, in the figure, 1... knife, 2... guide member, 3
... Disc-shaped base material, 4 ... Veneer, 5 ... Wedge-shaped piercing body, 6 ... Raw wood, 7 ... Peeling plate, 8 ... Corner of guide member, 9 ... Peeling plate and veneer transport direction The angle with...

Claims (1)

[Claims] 1. When cutting raw wood for veneer lace, use a movable wedge-shaped protrusion mounted on the knife to pierce the outer peripheral surface of the raw wood to be cut at least immediately before cutting, A method for tenderizing a veneer veneer immediately after cutting, characterized by further making deeper pierces by wedge-shaped piercers to generate cracks in the veneer veneer after cutting.