JPS61258702A - Veneer laminated material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (-1') Industrial Application Field The present invention is a bottom layer and a top layer of a rectangular long veneer with cross-grained fibers parallel to the short side direction, which are obtained by cutting raw wood. LVL (laminated), which is laminated in multiple layers using the horizontally grained rectangular long veneer and the vertically grained rectangular long veneer whose fiber direction is perpendicular to the fiber direction and parallel to the long side direction as an intermediate layer. Ted
Related to veneer laminated materials commonly known as veneer lumber or LVB (laminated veneer board) (2) Conventional technology Conventional veneer laminated materials are disclosed in, for example, Patent No. 982535 (Tokuko Show No. 54-14641 > Continuous production apparatus for laminated veneer lumber, and this type of laminated veneer lumber disclosed in Patent Application Publication No. 59-500126, manufacturing method and apparatus for laminated lumber, etc. Using a long rectangular veneer with the fiber direction parallel to the long side direction, stick the short sides of the veneer vertically with the ends of the short sides facing each other, or glue the ends of the short sides of the board together. The cut pieces are stacked on top of each other and pasted vertically, and all the joints are butted in the fiber direction (butt joint), or they are cut and stacked in the fiber direction (butt joint). LVL of staggered stacking made into scarf joint)
It was a product.

(c) Problems to be solved by the invention In conventional laminated veneer materials of this type, all joints are butt-jointed in the direction of the fibers, or LVL products used to be staggered and stacked in a scarf joint style in the fiber direction, but recently, rectangular long veneers whose fiber direction is parallel to the long side direction are stacked in parallel. In order to eliminate quality defects such as twisting and curving that frequently occur in LVL products, we have created a rectangular long veneer with the fiber direction parallel to the short side direction in a part between the layers, so-called cross punt, etc. LVB products have been devised that incorporate long rectangular veneers with many vertical grains and rectangular long veneers with horizontal grains whose fiber directions are perpendicular to each other.

However, the ends of the short sides of the rectangular long veneers, which are the main raw material for the laminated veneer materials of this type of LVB product and whose fiber direction is vertically parallel to the long side direction, are arranged in a scarf joint-style bevel-cut stack. Even if it is possible to do this due to the directionality of the strength in the long side direction, it is possible to By arranging them in a scarf joint style, the lack of strength in the long side direction makes it difficult to process, apply adhesive, and transport the rectangular pieces as they are. This became extremely difficult, and in practice it was not possible to match the end faces accurately. Therefore, when inserting this into the intermediate layer, there were many overlaps and tunnels at the mutual joints, making it extremely difficult to match. This was the main cause of quality deterioration.

In order to eliminate the production and quality problems of the conventional products mentioned above, the present invention is based on the short side of a rectangular long veneer in which the fiber direction is parallel to the short side direction in each of the bottom layer and the top layer. The end faces of the pieces are arranged in a butt joint style, and the ends of the long rectangular veneers with longitudinal grains parallel to the long side are arranged in the middle layer in a scarf joint style. This attempt was made to solve the production and quality problems by arranging the pieces in a stacked manner.

(1) Means for solving the problem The present invention eliminates the use of a rectangular long veneer with a horizontal grain in the intermediate layer, which was the root of the production and quality problems of the above-mentioned conventional products. For the veneer, fasten this to the bottom and top layers,
The aim was to construct a new type of veneer laminate material by attaching vertically grained rectangular long veneers in a staggered manner to all of the other intermediate layers.

That is, the veneer laminated material of the present invention has a veneer structure divided into a bottom layer, a top layer, and an intermediate layer, and the structure of each layer is a) a rectangular elongated unit in which the fiber direction of the bottom layer and the top layer is parallel to the short side direction. The end faces of the short sides of the plates are butted against each other and arranged horizontally, and the abutting points of the end faces are aligned in the same vertical position and pasted together.

b) Intermediate layer For each layer, the end of the rectangular long veneer is processed into a bevel cut, and the cut points of the rectangular long veneer are overlapped with each other in the longitudinal direction to arrange them vertically, and the cut edges are The overlapped parts are shifted by an appropriate distance stepwise for each layer and pasted.

This is a new type of laminated veneer material constructed as follows.

(e) Example To further explain this in detail with an example showing the veneer laminate of the present invention, FIG. It is a rectangular long veneer 1 in a normal state with horizontal grain parallel to the short side direction, and FIG. into a contrasting slope S of an appropriate length as shown in Figure 5,
For example, use a circular saw, cutter, or clipper on a slope S that is about 4 to 5 times the thickness of the main board.

The main raw material is a rectangular long veneer 3 that has been cut into slots using a laser beam or the like.

The plan view of the laminated veneer material of the present invention for rice grains is as shown in FIG. A cutting device 6 such as a circular saw is used to cut into individual products from a point 5 where the sides are butted against each other in a butt joint style. Because a product is made,
It is no longer necessary to process the rectangular long veneer 1 at the butt point 5 into slots in advance and overlap them in a scarf joint style, and to sufficiently secure the overlapped portions with adhesive. The man-hours and expenses can be reduced accordingly, and the veneer yield can also be improved.

FIG. 2 is a side view of the present invention, and the lowermost layer and the uppermost layer each include an end face 4 between the short sides of a rectangular long veneer 1 whose fiber direction is parallel to the short side direction. are arranged horizontally so as to abut each other, and at the abutting point 5 of the end surface 4.
Align the top and bottom in the same position and paste them. In addition, each layer of the intermediate layer has a rectangular long veneer 3 whose fiber direction is parallel to the long side direction.
The wood end 2 is processed into a slotted cut, and the slotted parts 7 are overlapped in the long side direction and arranged vertically, and the overlapped parts 7 are separated by an appropriate distance for each layer. For example, the rectangular long veneer plates 3 are attached at a distance l which is about 30 times the thickness of the plate, and are shifted in a stepwise manner. Although the figure shows the case of a 7-ply product, by increasing the number of adhered plies of the rectangular long veneer 3 of the intermediate layer, it is possible to make a veneer laminate with an appropriate number of plies. Of course.

~ Effects of the Invention Similar to the ridges, the present invention is characterized in that the end faces of the short sides of a rectangular long veneer with cross-grained grains parallel to the short side direction in the bottom layer and the top layer are mutually butt jointed. Arranged so as to butt against the wind, and in the entire middle layer, the ends of rectangular long veneers with vertical grains parallel to the long side direction are arranged in a scarf joint-like manner by cutting and stacking them. Because it is a new type of laminated veneer material created by LVB'#, it does not have the shortcomings in the long side direction that were caused when a horizontally grained long rectangular veneer was used for the middle layer like the conventional LVB'# product. strength to do.

By using the rectangular short veneer, we were able to eliminate all of the difficulties in slicing, applying adhesive, and transporting the veneer due to the orientation of the veneer. Not only that, butt-joint style end faces of the short sides of cross-grained long rectangular veneers were used to butt together in the middle layer, which often occurred at mutual joints. The occurrence of overlaps and tunnels can be almost completely eliminated by using the rectangular long veneer that is cut and stacked like a scarf joint according to the present invention, and the quality of the product can be significantly improved. It is something that

In addition, the laminated veneer material of the present invention is applied by aligning the butt-joint style butt joint-like butt joints of the end faces of the rectangular long veneers formed at equal intervals on the bottom and top layers of the veneer so that they are aligned at the same position on the top and bottom. Since the position is adjusted so that each product is cut into individual single products from the butt point, it is necessary to prepare the There is no need to process the butt points of the bottom and top layer rectangular long veneers into squares and overlap them in a scarf joint style, and to secure the overlapped areas sufficiently with adhesive. As a result, rectangular long veneers in their normal state can now be used as they are, which reduces man-hours and overhead costs, and improves the veneer yield at the same time. .

[Brief explanation of drawings]

The figures show an example of the implementation of the present invention, in which FIG. 1 is a plan view of the product, FIG. 2 is a side view of the product,
3 and 4 are plan views of a rectangular long veneer, and FIG. 5 is a side view of a rectangular long veneer cut into slots. 1.3... Rectangular long veneer, 2... Wood end, 4... End face, 5... Butt point, 7... Beam cut overlapping point.

Claims (1)

[Claims] In each of the bottom layer and the top layer, rectangular long veneers whose fiber direction is parallel to the short side direction are arranged horizontally with the end surfaces of the short sides abutting each other, and the abutting points of the end surfaces are The top and bottom are aligned in the same position, and each layer in the middle is a rectangular long veneer whose fiber direction is parallel to the long side direction. 1. A laminated veneer material characterized in that the cross-cut areas are stacked and arranged vertically, and the overlapped cross-cut areas are shifted by an appropriate distance in a stepped manner for each layer and are pasted.