JPH0249602B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is a method for forming log wood such as thinned wood in afforestation, or wood scraps on the skin side after collecting prismatic wood from the log into sawn wood. This invention relates to a method for producing a laminated wood blank board by effectively utilizing substantially the entire volume of the laminated board without waste.

Conventional technology and its issues There is no effective way to utilize the wood scraps on the skin side after thinning or prismatic wood, which is harvested in large quantities during afforestation, is realistically discarded or incinerated. There are many things. Since the thinned wood or wood scraps disposed of in this manner are made of high-quality wood such as cedar or cypress, it is desirable to reuse them.

Conventionally, such waste wood has been cut and shredded into chips to be used as a raw material for pulp or to manufacture boards by compacting the chips into flat plates. However, in this case, the waste wood is shredded into chips, so there is a drawback that the unique fabric of wood cannot be utilized. In other words, wood has a grain, and the pattern formed by the grain forming stripes on the surface of a board or pillar is generally preferred, and the soft feel of wood makes it a popular material for houses, furniture, etc. It is being done. Therefore, there is a need to develop a method for effectively utilizing waste wood, such as thinned wood and wood scraps, that can be used directly as wood fabric.

Therefore, even if logs such as thinned wood are sawn and laminated to make boards, the diameters of the base and end of the logs are different, so in order to obtain a rectangular board as a product, it is necessary to Both sides of the sawn material in the longitudinal direction must be cut to match the dimensions, which results in waste, and the proportion of the area that can be used as board material in the total volume decreases.

Therefore, in view of the above-mentioned circumstances, it is an object of the present invention to provide a method for manufacturing a laminated wood blank board that uses thinned wood and wood scraps to effectively utilize almost the entire area without waste. It is something.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention forms logs into sawn wood having a substantially trapezoidal plane and cross-sectional shape including a head end and a end end with different diameter dimensions, and Steps are cut on both ends in the longitudinal direction of the planar shape, and the long side protrudes from the edges of the short sides of the two parallel sides in the cross-sectional shape. A method for manufacturing laminated wood raw boards, in which substantially the entire volume of logs is assembled and used in a board by joining the ends and ends adjacent to each other alternately and assembling them into a predetermined board, and a prismatic column made from logs The wood scraps that remain after collecting the wood are formed into sawn wood having a substantially trapezoidal planar and cross-sectional shape including a base and a tail with different diameters,
At both ends in the longitudinal direction of the planar shape of the sawn material,
Steps are cut and formed with the long sides protruding from the edges of the short sides of the two parallel sides in the cross-sectional shape, and the sawn material is passed through the steps so that the base end and the end end are adjacent to each other alternately. The present invention provides a method for manufacturing a laminated wood raw board, in which substantially the entire volume of wood scraps is assembled into a board by joining them to form a predetermined board.

Effect: According to the above-mentioned means of the present invention, the sawn timber having a substantially trapezoidal plane and cross-sectional shape formed from wood scraps left after collecting logs or prismatic timbers is arranged so that the base end and the end end thereof are alternately adjacent to each other. As shown in FIG. Therefore, when assembling into rectangular boards, there is no need to cut both sides in the longitudinal direction to match the dimensions of the end due to the difference in the diameter of the head and end, and it is possible to Almost the entire area can be assembled and utilized on the blank board without waste. In addition, because the base and tail ends are joined alternately adjacent to each other through the steps, the curvature directions of the annual rings are stacked so that they are opposite to each other. The warping that occurs acts to increase the bonding strength at each step, resulting in good adhesion and high utility as a wood material board.

Embodiment An embodiment of the present invention will be described below based on the drawings.

A log 1 as shown in Fig. 1 has different diameters D and d at its base 2 and end 3, respectively.
>d relationship. Therefore, as shown in Fig. 2, with the terminal end 3 as a reference and the core 4 of the annual ring as the center, the sawn materials a, b1, b2, c1, c2
get. Therefore, sawn wood b1, b2 and sawed wood c
1 and c2 are each symmetrical, and their original and final diameters are approximately the same. Therefore,
The sawn materials b1 and b2 can be said to be the same material, and the same can be said of the sawn materials c1 and c2. Each of these sawn pieces b1, b2, c1, and c2 has a substantially trapezoidal plane and cross-sectional shape, and both ends in the longitudinal direction are curved portions 6 that constitute the outer periphery of the log material 1. Therefore, as shown in FIGS. 3A and 3B, edges on the short sides of the two parallel sides in the cross-sectional shape are attached to both ends in the longitudinal direction of the planar shape between the base end 2 and end end 3 of each sawn material. Stepped portions 5, 5 with protruding long sides as a reference
Form by cutting. For example, as shown in FIG. 4, the stepped portions 5, 5 have a circular cutter 8 coaxially protruding from one side of the circular saw 7, and a shaft 9 attached to the shaft so that both can rotate as a unit. It is formed using a selvage machine. Thus, by cutting off the curved parts 6, 6, step parts 5, 5, which are symmetrical and whose long side in cross-sectional shape protrudes, are formed at both ends in the longitudinal direction of each sawn material. Note that the step height dimension H of the step portion 6 is approximately one half of the thickness dimension of the sawn material, and the step width dimension W is also approximately the same as the step height dimension H.

Therefore, the sawn material having a substantially trapezoidal plane and cross-sectional shape obtained in the above manner is, for example, as shown in FIG. The laminated wood material boards e having a constant width are assembled by joining them through the step portions 5, 5 so as to be adjacent to each other. The respective step portions 5, 5 to be joined are joined using an adhesive. Therefore, as shown in Figure 6, sawn material b
The annual rings 10 of No. 1 and the annual rings 11 of the sawn material b2 are assembled so that the curvature directions of the adjacent annual rings 10 are opposite to each other. In this way, the laminated wood blank board e is laminated as a plate material of a constant width from left-right symmetrical sawn timbers b1 and b2 of the same size.

Next, to explain the sawn material a, the sawn material a is sawn from the log material 1 as described above, and the sawn material a including the core portion 4 has a substantially trapezoidal plane and cross-sectional shape, and both ends of the sawn material in the longitudinal direction are made of log material. Although the curved portion 6 constitutes the outer periphery of the curved portion 1, it is symmetrical and does not have a counterpart material of the same size. Therefore, as shown in FIG. 7, the sawn material a is divided into two parts along the center line of the sawn material a, and the sawn material f and g are left-right symmetrical and have the same dimensions. In this case, when cutting the sawn material a along the center line, the step portions 5, 5 as described above are used.
In order to form a special circular saw 12 and circular cutter 1
3. Use an ear holder equipped with 3. This circular saw 12 is similar to the circular saw 7, and the circular cutter 13 is the same as the circular cutter 8, but is fixed coaxially to both sides of the circular saw 12, and can be rotated integrally by a shaft 14. be. Note that the stepped portions 5, 5 formed by cutting on both ends of the sawn materials f and g in the longitudinal direction, which are obtained by dividing the sawn material a into two, are also formed on the long side with the edge of the short side of the two parallel sides in the cross-sectional shape as a reference. Although the sides are protruding, in this case, the lengths of the two parallel sides in the cross-sectional shape are approximately the same.

As shown in FIG. 5, the integrally joined sawn timbers f and g have the head end 2 and end end 3 adjacent to each other, and the stepped parts 5, 5 are joined to form a laminated wood product of a constant width. They are assembled as the main plate e. The laminated wood blank boards e assembled in this way are further joined laterally via the step portions 5, 5 to obtain a board material of a predetermined width. Therefore, as shown in Fig. 8, the log material 1 is sawn to a predetermined thickness from the end 3, and at both ends are made long with reference to the edges of the short sides of the two parallel sides in the cross-sectional shape. By collecting sawn wood with stepped sections 5, 5 with protruding sides formed, approximately 90% or more of the total volume can be effectively utilized. In other words, only the portion 15 (having a length extending from the tail end 3 to the base end 2) sandwiched between the arc portion and the stepped portion along the outer peripheral edge of the log material 1 has to be discarded as waste material. be.

Next, a second embodiment of the present invention will be described.

As shown in FIG. 9, when the prismatic material is collected from the log material 1, each set of wood scraps 16 and 17 is made from the remaining material. Therefore, these wood scraps 16, 16 and wood scraps 1
7 and 17 are each formed into a sawn material having a substantially trapezoidal plane and cross-sectional shape including the base end 2 and end end 3 as in the first embodiment, and both ends in the longitudinal direction of the planar shape of the sawn material are Step portions 5, 5 whose long sides protrude with reference to the edges of the short sides of the two parallel sides in the cross-sectional shape are formed by cutting. For example, as shown in FIG. 10, the maximum thickness that can be collected from the end 3 is determined and the sawn material is sawn, and the thus obtained sawn material is divided into sawn material h having stepped portions 5, 5, as shown in FIG. form as. Then, two pieces of sawn wood h obtained from a set of wood scraps 16, 16 are placed at the base 2 in the same manner as in the first embodiment.
and the end 3 are made adjacent to each other, and are joined to each other via the stepped portions 5, 5 to form a laminated wood material board e.

In the above explanation, each sawn timber was joined only in the width direction through the stepped part, but in some cases, two or three laminated wood raw boards e obtained as described above may be joined. It may be of the same structure as the above laminated plywood. As for the overlapping method, the laminated wood material boards are joined one above the other so that the joined step portions are diagonal or orthogonal.

Effects of the Invention According to the present invention described above, sawn material having a substantially trapezoidal plane and cross-sectional shape including a base end and a end end having different diameter dimensions is made so that the base end and the end end are alternately adjacent to each other. In order to join and assemble into a predetermined board, when assembling into rectangular sawn timber, due to the difference in diameter between the base and end, both sides in the longitudinal direction are cut to match the size of the end. There is no need to cut it out, and almost the entire volume of logs, etc. can be assembled into a raw board and used without wasting it. In addition, since the step part for joining the sawn material is cut and formed as a step part with the long side of the cross-sectional shape protruding, there is extremely little waste, and almost the entire area can be effectively used without wasting it. can do. Further, it is possible to effectively utilize logs of thinned wood or prismatic wood from logs, which has not been effectively utilized in the past, as wood scraps that remain as laminated wood. Moreover, since the laminated board according to the present invention is joined so that the base end and the end end are alternately adjacent to each other through the stepped portion, the laminated board is assembled so that the curvature directions of the annual rings are opposite to each other between adjacent ones. The warpage that occurs in each sawn material increases the bonding strength with each other at each step, resulting in good adhesion, and furthermore, the warpage of the laminated board as a whole cancels out and disappears. Therefore, it can be used for a variety of purposes as a raw board for construction and other purposes, and can be provided at a low cost.

[Brief explanation of the drawing]

Fig. 1 is a perspective external view of the log material, Fig. 2 is a sawing instruction diagram of the sawn material according to the present invention, Fig. 3A is a front end view of the sawn material, and Fig. 3B is the sawn material. distal end view of
Figure 4 is a side view of the saw saw, Figure 5 is a plan view of the laminated wood raw board, and Figure 6 is an end view of the laminated wood raw board.
Figure 7 is a side view of the ear saw and sawn wood showing the ear saw method, Figure 8 is an explanatory diagram showing the utilization of log wood, and Figure 9
The figure is an end view of a log in a state where wood scraps are collected, FIG. 10 is an end view of the wood scraps, and FIG. 11 is an end view of a laminated wood blank board obtained from the wood scraps. 1...Log material, 2...Middle end, 3...Final end, 4...
...Core part, 5...Step part, 6...Curved part, 16, 17...
...Wood scraps.

Claims (1)

[Scope of Claims] 1. A log is formed into a sawn material having a substantially trapezoidal plane and cross-sectional shape including a base end and an end end having different diameter dimensions, and the planar shape of the sawn material has a sawn material at both ends in the longitudinal direction. Steps are formed by cutting the long side of the cross-sectional shape with the long side protruding from the edges of the short sides of the two parallel sides, and the base end and the end end of the sawn material are alternately adjacent to each other through the step part. A method for manufacturing a laminated wood raw board, characterized in that substantially the entire volume of the logs is used as a board by joining them together in a predetermined board. 2. The wood scraps that remain after collecting prismatic wood from logs are formed into sawn wood having an approximately trapezoidal plane and cross-sectional shape, including a head and end end with different diameter dimensions, and the length of the sawn wood in the plane shape is Steps are cut on both ends of the direction, with the long side protruding from the edges of the short sides of the two parallel sides in the cross-sectional shape, and the sawn material is passed through the steps to the base and end. A method for manufacturing a laminated wood raw board, characterized in that substantially the entire area of wood scraps is assembled into a board by joining them so that they are alternately adjacent to each other and assembling them into a predetermined board.