JPH0434482B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a method for assembling small-diameter thinned timber, and more specifically, it relates to a method for assembling small-diameter thinned timber, and more specifically, by assembling a large number of small-diameter thinned timber and finger-connecting them to form a long length. When manufacturing laminated wood used as building materials by laminating these boards in the direction of heat, we can eliminate the occurrence of defective products due to failures in the lamination process, and at the same time improve adhesive strength. The present invention relates to a new means for producing laminated wood.

BACKGROUND ART When afforestation or afforestation is carried out in mountainous areas, the various types of planted trees are thinned depending on their growth condition. In other words, in cases where the wood is poorly grown, bent, or where there is insufficient sunlight between adjacent trees, the natural value of the wood has not yet been realized. They will be cut down or thinned out. Thinned wood that has been felled mid-way in this way is, of course, too small in diameter to be used as building materials, etc., and has almost no commercial value.

For this reason, in the past, it was only used as fuel for kindling and bathing, but with the recent technological advances in woodworking machinery and the development of finger joint devices, there is now a way to effectively utilize the thinned wood. Newly opened. That is, a wide board is obtained by assembling a large number of small-diameter thinned timbers and press-joining each thinning timber to each other at the end face of the thinned timbers with finger cuts.
This is used as a building material or core material. This type of prior art includes, for example, JP-A-58-
The invention ``Method for cutting and collecting small-diameter trees'' disclosed in Publication No. 36402 is publicly known. As shown in Fig. 1a, a small-diameter thinned timber 10 is cut transversely into an appropriate length, and then sawn and cut vertically from the center to obtain a two-split timber 12, which is dried and then cut into two pieces. As shown in Fig. 1c, the trapezoidal plate material 14 is cut into a trapezoidal shape, finger notches 16 are formed on both ends of the trapezoidal plate material 14, and an adhesive is applied to the plate material 14. After connecting many pieces in the axial direction, the pieces are compressed to form finger connections. (See Figure 1d).

The obtained trapezoidal elongated materials 18 are arranged horizontally in an alternately upside-down manner as shown in FIG. This wide board 20 is
As shown in Fig. 1f, a block-shaped laminated timber is obtained by stacking the required number of laminated timbers in the vertical direction, and this is then sawed and cut into the required dimensions to produce a laminated timber suitable as a core material for building materials and decorative laminates. Ru.

Problems to be Solved by the Invention However, according to the method described above, when performing the finger connection work shown in FIG. There is a problem in that the side surfaces are not aligned straight, resulting in a defective product that cannot be used in the subsequent process shown in FIG. 1e.

Purpose of the Invention In addition, in the process shown in FIG. 1e, when pressing is performed from the lateral direction for finger connection, the trapezoidal plate 14 located in the middle tends to lift up and cause a connection failure. be pointed out.

The present invention has been devised in order to satisfactorily overcome the above-mentioned drawbacks in producing wide block-shaped laminated timber by assembling such small-diameter thinned timber. The purpose of the present invention is to eliminate the occurrence of defective products due to failure in manufacturing, and to provide a means for manufacturing laminated wood with improved adhesive strength.

Means for Solving the Problems In order to overcome the above-mentioned problems and achieve the intended purpose, the present invention comprises vertically sawing log-shaped small-diameter thinned wood cut to a required length into a plurality of board materials, and The longitudinal side surface of the plate is cut to give it a trapezoidal slope, and finger-shaped cuts are formed at the front and back ends of the plate, and the resulting cuts are engaged with each other in the longitudinal direction to create a finger joint. In a method for gluing thinned wood with a small diameter, the method comprises: obtaining a long piece of wood by thinning the wood, and gluing the inclined side surfaces of the long pieces of wood laterally to each other to obtain a laminated wood of a desired width. After cutting a plurality of longitudinal cuts on the inclined side surface of the board and performing the longitudinal finger joint on the board to obtain long pieces of wood, the longitudinal cuts of these long pieces of wood are By applying an adhesive, adjoining long pieces of wood are alternately lined up horizontally in opposite directions and glued together under pressure, thereby creating a wide piece of laminated wood that is interlocked and joined at the cut portions of the plurality of strips. It is characterized by obtaining.

EXAMPLE Next, a method for assembling small-diameter thinned timber according to the present invention will be described below with reference to the accompanying drawings. Figure 2 shows the process of carrying out the method of the present invention over time, in which the thinned small-diameter wood that has been felled is stripped of its bark prior to carrying out the method, and the roots of the thinned wood are When it is significantly deformed, the deformed part is shaved off into a round shape. The small-diameter thinned timber that has been prepared for lamination in this way is shaved into round bars over the entire length in the longitudinal direction, as shown in Figure 2a, and this log-shaped thinned timber 22 is cut into logs by measuring the log diameter. Sorting is done for each diameter. This sorted log-shaped thinned material 22 is vertically sawn using a cutting means such as a band saw to form a plurality of plates 22 (see FIG. 2b).

This plate material 22 is dehumidified by means such as natural drying or forced drying to prevent warping or bending at a later date, and is then cut into a trapezoid by an appropriate woodworking means such as a molder. That is, the second
As shown in FIG. c, both end faces in the longitudinal direction of the plate 22 are cut so that the cross section thereof has a trapezoidal shape to form a trapezoidal inclined surface. Simultaneously with this cutting, or as an operation subsequent to this cutting, a plurality of cuts 24 (which may also be fingers) are formed on the inclined side surface. After all, at this point, the trapezoidal short material 2 is relatively short, has a trapezoidal cross section, and has a plurality of notches 24 cut on the inclined side surface.
6 is obtained.

An appropriate adhesive is applied to the inclined side surface of the obtained trapezoidal short material 26, and then the trapezoidal short material 26 is
The plurality of cut portions 2 are arranged alternately in the horizontal direction so that the vertical directions are alternately reversed, and then a press is applied from the horizontal direction to compress the plurality of cut portions 2.
4, a wide and relatively short board 28 is obtained (see FIG. 2 d). As shown in FIG. A finger cut 30 is cut in. The finger cut 30 may be cut in the vertical (vertical) direction, or may be cut in the lateral (horizontal) direction.
Wide and short board 28 with the notch 30 formed therein
After applying adhesive to both ends in the front and back direction, finger jointing is performed to obtain a long wide board 32 (see FIG. 2 f).
As shown in FIG. 2g, these long and wide boards 32 are stacked in large numbers in the thickness direction and bonded together to produce a block-shaped laminated timber 34 of a required thickness. This block-shaped laminated timber 34 is further cut into required dimensions and suitably used as a core material for various building materials and decorative boards.

Effects of the Invention As described above, according to the method for assembling small-diameter thinned timber according to the present invention, each trapezoidal short timber 26 in the step shown in FIG. Trapezoidal short material 26
Since they mesh with each other, there will be no misalignment due to misalignment, and there will be no frequent occurrence of defective products during assembly. Moreover, since the plurality of notches 24 are formed on the inclined side surface of the trapezoidal short material 26, the bonding area is increased, and the strength is dramatically improved. In addition, as can be understood from the trapezoidal short material 26, since the materials are bonded in a relatively short length, the bonding process is easy and there is no need to use a large press device. It offers many beneficial advantages.

[Brief explanation of drawings]

Figures 1a to 1f are schematic explanatory diagrams showing each step of the method for cutting and collecting small diameter trees according to the invention disclosed in JP-A No. 58-36402, and Figures 2 a to g are small diameter thinned timber according to the present invention. FIG. 3 is a schematic explanatory diagram showing each step of the assembly method. 22... Board material, 24... Notch, 26... Trapezoidal short material, 28... Wide short board, 32... Wide long board, 34... Block-shaped laminated wood.

Claims (1)

[Scope of Claims] 1 Log-shaped small-diameter thinned wood cut to a required length is vertically sawn into a plurality of temporary materials, the longitudinal sides of the board are cut to give a trapezoidal slope, and Finger-shaped notches are formed at the front and back ends of the plate material,
A long piece of wood is obtained by performing a finger joint in which the obtained cuts are interlocked with each other in the longitudinal direction, and the slanted sides of this long piece of wood are glued laterally to each other to form the required width. In a method for laminating small-diameter thinned timber to obtain laminated timber, a plurality of longitudinal cuts are cut on the inclined side surface of the board, and the longitudinal finger joints are performed on the board to form a long piece. After forming the pieces of wood, an adhesive is applied to the longitudinal cuts of these long pieces of wood, and adjacent long pieces of wood are lined up in the horizontal direction so that they are alternately oriented in opposite directions and are bonded under pressure. A method for laminating small-diameter thinned timber, the method comprising obtaining wide laminated timber that is interlocked and joined at the plurality of cut portions.