JPH0231642B2 - BENYATANBANNOTENDAARAIJINGUSOCHI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a veneer veneer tenderizing device.

Conventionally, there have been a variety of devices that form many small cracks in veneer veneers, so-called tenderizing devices, for the purpose of imparting flexibility to veneer veneers or suppressing expansion caused by adhesive application. However, all of them have drawbacks such as the formation of small cracks differing significantly depending on the thickness and material of the veneer, or the mechanism is complicated and parts are subject to rapid wear and tear. Ta.

Therefore, the present applicant has previously published ``Method and Apparatus for Forming Small Cracks in Veneer Plywood'' (Japanese Unexamined Patent Publication No. 51-1999).
As disclosed in Japanese Patent No. 110007), a carry-in roller is made up of a plurality of pairs of narrow rollers arranged opposite each other so as to drive at least one side, and arranged at appropriate intervals in the axial direction of the rollers. and a carry-out roller group, which is made up of a plurality of pairs of narrow rollers arranged opposite each other so as to drive at least one side, and arranged at appropriate intervals in the axial direction of the rollers. The roller groups are arranged in a staggered manner so that their axes are very close to each other, and the peripheral speed of the unloading roller group is continuously or periodically larger than the peripheral speed of the loading roller group. We developed a veneer veneer tenderizing device that drives each roller group to achieve the desired results, in an effort to eliminate the shortcomings of conventional devices.

According to the new type of tenderizing equipment, it is not only possible to form almost desired small cracks in a relatively orderly manner without being significantly affected by the thickness, material, etc. of the veneer veneer, but it is also possible to form small cracks as needed. In this case, the interval between small cracks can be easily adjusted by changing the distance between the axes of both roller groups, or by changing the cycle of changing the circumferential speed of one of the roller groups. Although it was possible to change the parameters and was extremely effective, further improvements in practicality as described below were desired.

In other words, when inserting veneer veneers one after another into equipment at a plywood factory, the edges of the veneer veneers may be bent when they are inserted, or foreign matter such as scraps or wood chips may be placed on the top surface of the veneer veneers. Sometimes it is inserted as it is,
If each roller group of the device is provided in a fixed manner, there is a risk that overlapping parts of the plywood veneers may be crushed, which may impede use. If the rollers are displaceable as a whole, there will be an inconvenience that the rollers will not come into contact with areas such as overlapping veneer veneers, making it impossible to form small cracks. If the rollers on either side are individually displaceable, the mechanisms and adjustments will be extremely complicated, making them unsuitable for practical use. There was a strong desire for further performance improvements and simplification.

The present invention has been developed to solve the above-mentioned problems, and has been improved so that it is possible to form desired small cracks in veneer veneers, and also to be able to cope with abnormal loads such as overlapping of veneer veneers without difficulty. To provide a device with an extremely simple and rational configuration,
The aim is to streamline the process of tenderizing veneer veneers in plywood factories.

The present invention will be described below based on an example of implementation illustrated in the drawings.

FIG. 1 is a partial front view of the device according to the invention, and FIG. 2 is a side sectional view thereof. 2 in the figure is a ring-shaped ring having a strength that allows it to be elastically deformed in the diametrical direction against the action of abnormal loads such as passage of foreign objects. The rollers 3 are disk-shaped rollers that are disposed opposite to the ring-shaped roller 2, and are arranged in a plurality of pairs at appropriate intervals in the axial direction to form a carry-in roller group. Similarly, 4 is a ring-shaped roller having the strength to be elastically deformed in the diametrical direction against the action of an abnormal load, and 5 is a disc-shaped roller disposed opposite to the ring-shaped roller 4, each of which has an axis. A plurality of pairs are arranged at appropriate intervals in the direction to form a group of carry-out rollers.

As is clear from the figure, the roller groups are arranged in a staggered manner so that their axes are very close to each other, and the roller group on the carry-in side is arranged on the grooved support shaft 6 or the main shaft. 7, and the peripheral speed of the unloading roller group is increased by at least one of the grooved support shaft 8 or the main shaft 9. It is driven by an appropriate drive source (not shown) so that the circumferential speed is continuously or periodically higher than the circumferential speed of.

The device according to the present invention is configured as described above, for example, and when a veneer veneer 1 is inserted into the device in a direction perpendicular to the fibers, tension is applied to the veneer 1 due to the difference in circumferential speed between both roller groups. A force is applied, and the tensile force sequentially causes many small cracks 1 in the veneer veneer 1.
0 is formed.

According to the device, the magnitude and position of the tensile force are stable, so almost the desired small cracks can be formed in a relatively orderly manner without being significantly affected by the thickness, material, etc. of the veneer veneer. Of course, this is possible; for example, even if a veneer is accidentally inserted with debris or other foreign matter on its surface, the seventh
As is clear from the figure, the ring-shaped rollers 2 and 4 in the portion through which the foreign object 11 passes can elastically deform in the diametrical direction in response to the abnormal load action, so it is obvious that this is not possible for both the plywood veneer and the device itself. The main shaft or grooved support shaft that supports each roller can be used to pass through without difficulty while forming small cracks as usual, and the ring-shaped rollers can be elastically deformed to avoid problems. It is now possible to provide a fixed support member such as a single piece as shown in the figure or a semi-fixed form movable in a desired direction, which greatly simplifies the device and allows the spacing of small cracks to be adjusted as necessary. This does not require complex adjustments in case the axial spacing between each roller group is changed to correspond to the thickness of the veneer veneer. The advantage of being able to construct a device that allows desired changes to be made extremely easily is extremely effective in terms of practical use of the device and in plywood factories.

Further, in the embodiment illustrated in FIGS. 3 and 4, a plurality of ring-shaped rollers 12 and a plurality of disc-shaped rollers 13 forming a carry-in roller group are arranged as shown in the figure, and a grooved support shaft is provided. A plurality of ring-shaped rollers 14 and a plurality of disk-shaped rollers are driven through at least one of support shafts 16, 18 or flanged support shafts 17, 19, and form a group of rollers on the carry-out side. The support shafts 20, 2 with flanges are arranged as shown in FIG.
2 or grooved support shafts 21, 23. Although the number of support shafts is increased compared to the previous embodiment, both roller groups are the same. Since the side rollers can be elastically deformed, it is easy to make the distance between the axes of both roller groups as close as possible if necessary, which is convenient when trying to narrow the spacing between small cracks. .

Further, in the embodiment illustrated in FIG. 5, a plurality of ring-shaped rollers 24 and a plurality of disc-shaped rollers 25 forming the carry-in roller group are arranged as shown in the figure.
A plurality of pairs of ring-shaped rollers 26 and 27 are shown which are driven via at least one of the grooved support shaft 28, the flanged support shaft 29, or the main shaft 30, and which form a group of unloading rollers. The embodiment illustrated in FIG. A plurality of pairs of ring-shaped rollers 34, 35 forming a roller group are arranged as shown in the figure, and are driven via at least one of grooved support shafts 38, 40 or flanged support shafts 39, 41. At the same time, a plurality of pairs of ring-shaped rollers 3 forming a group of unloading rollers
6 and 37 are arranged as shown in the figure, and the flanged support shaft 4
2, 44 or grooved support shafts 43, 45, and as in the previous embodiment, both roller groups can be driven as necessary. It is easy to make the distance between the axes as close as possible.

The strength of the ring-shaped roller depends on its diameter, thickness, and
It is difficult to specify the dimensions because they vary depending on factors such as the material, and the key point is that the veneer veneers are inserted overlapping each other, or the veneer veneers are inserted with debris etc. on the surface. A material with a relatively large diameter is suitable for stable deformation and rotation, and it is suitable for experiments. When we used stainless steel plates with a diameter of 400 mm, a width of 11 mm, and a thickness of 5, 6, and 7 mm, all were good.

In addition, the width or spacing of each roller does not necessarily have to be uniform, and there may be some gaps between each roller, or if each roller is made of iron, the outer peripheral surface may be plated or rubberized. There is no problem with applying treatments such as coating, but in any case, since the grooves in the grooved support shaft are for guiding each roller, it is necessary to separately provide a roller guide member of an appropriately shaped shape. If necessary, the ring-shaped roller may be supported from the inside.

[Brief explanation of drawings]

The drawings are for explaining the present invention, and FIGS. 1 and 3 are partial front views illustrating an embodiment of the apparatus according to the present invention, FIG. 2 is a side sectional view of FIG. 1,
FIG. 4 is a side sectional view of FIG. 3, FIGS. 5 and 6 are side sectional views illustrating other embodiments of the device according to the present invention, and FIG. 7 illustrates a deformed state of the ring-shaped roller. FIG. 1...Plywood veneer, 2, 4, 12, 14, 24,
26, 27, 34, 35, 36, 37... Ring-shaped roller, 3, 5, 13, 15, 25... Disc-shaped roller, 6, 8, 16, 18, 21, 23, 2
8, 32, 33, 38, 40, 43, 45... Grooved support shaft, 7, 9, 30... Main shaft, 17, 19, 2
0, 22, 29, 31, 39, 41, 42, 44
...Support shaft with flange, 10...Small crack, 11...Foreign object.

Claims (1)

[Claims] 1. A carry-in roller group consisting of a plurality of pairs of narrow rollers arranged opposite each other so as to drive at least one side, and arranged at appropriate intervals in the axial direction of the rollers; or a carry-out roller group consisting of a plurality of pairs of narrow rollers arranged opposite each other so as to be driven on one side, and arranged at appropriate intervals in the axial direction of the rollers; The roller groups are arranged in a staggered manner so as to be very close to each other, and each roller group is driven so that the circumferential speed of the unloading roller group is continuously or periodically larger than the circumferential speed of the unloading roller group. A veneer veneer tenderizing device, wherein the veneer veneer double passes through at least one roller of the carry-in roller group and at least one roller of the carry-out roller group. A veneer veneer tenderizing device is characterized by having a narrow ring-shaped roller having the strength to be elastically deformed in the diametrical direction in response to abnormal load action such as.