JP2002307409A - Method for manufacturing glued laminated timber and glued laminated timber formed by the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a glued laminated timber having an excellent strength and quality at a low cost by effectively utilizing a sapwood from a log which has been heretofore limited in an application and wastefully consumed. SOLUTION: A method for manufacturing the glued laminated timber comprises the steps of preparing the sapwoods 3, 3 generated in the case of cutting out a core material 2 from the log 1, cutting off a bark side from the sapwood parallel to the face of the pith side to form plate-like materials 5, 5 to become substantially plate-like material shapes. The method further comprises the steps of laminating the plate-like materials so that the cut-off faces are superposed in a state in which the bark sides are directed in the same direction or in a state in which the mark sides are directed in opposite directions, laminating the materials, then cutting off the edge parts to form the glued laminated timbers 8, 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to, for example,
The present invention relates to a method of manufacturing a laminated wood that can be used as a wooden building material such as a half-split wood or a panel core, and a laminated wood formed by this manufacturing method.

[0002]

2. Description of the Related Art Heretofore, this type of glued lumber has been used, for example, in such a manner that lamina (saw board) or small square wood obtained by cutting raw wood such as imported foreign wood is made so that the fiber directions are substantially parallel to each other. By gluing and bonding in the thickness, width and length directions, it is formed as a square or thick plate. Although such glued lumber is generally more expensive than mulk wood depending on the type of raw wood, it is useful from the viewpoint of effective use of resources and is often used.

[0003] By the way, the core part from the log (log material),
It may be cut out as a general lumber product such as a columnar member. At the time of such lumbering, a sapwood section having a substantially arcuate cross section including an arc surface and a plane on the back side of the tree is formed on the four sides of the log. Conventionally, such sapwood parts have been generally used only as crushed base materials or chips, for example.

[0004]

However, when the raw wood is high-grade wood such as domestic cedar wood, for example,
As described above, the use of the sapwood portion as a lath base material or chip has been inevitable from the viewpoint of effective utilization of resources. In addition, since the crushing treatment for use as chips takes too much time and poses a problem in terms of cost, it is desired to take some measures to effectively utilize the sapwood portion described above.

[0005] The present invention has been made in view of such circumstances, and by using only the sapwood portion generated at the time of cutting the core material portion from the raw wood, the laminated wood is formed.
A method of manufacturing a laminated wood that can effectively utilize the same, achieve a low cost of the laminated wood, secure the strength of the laminated wood, and improve the quality thereof, and a laminated wood formed by this manufacturing method It is intended to provide.

[0006]

According to the present invention, there is provided a method for manufacturing a laminated timber according to the present invention, in which a sapwood portion generated when a core portion is cut from a log is prepared, and the sapwood portion is prepared. By cutting off the front side of the tree in parallel with the back side of the tree, a plate-like material having a substantially plate-like shape was formed, and these plate-like materials were laminated and bonded so that each of the wide faces overlapped. Thereafter, the laminated material is formed by cutting off the edge portion.

[0007] Here, the above-mentioned plate-like material made of the sapwood portion is laminated with the wooden surface facing in the same direction, or the wide surface is laminated with the wooden surface facing in opposite directions. The laminated material is formed by laminating the dowels so as to overlap each other. In addition, after laminating and bonding the above-described plate-shaped materials so that the respective wide surfaces overlap each other, the laminated material is formed by dividing the plate-shaped materials at positions equally divided in the width direction of the plate-shaped materials. May be.

The glued laminated wood according to the present invention is obtained by cutting a sapwood portion, which is formed when a core portion is cut out from a raw wood, in parallel with a surface on the backside of the sapwood portion, thereby obtaining a plate-like material having a substantially plate shape. It is characterized by being formed by laminating and bonding these plate-shaped materials so that their wide surfaces overlap each other, and cutting off the edge portions thereof.

Here, the laminated wood is obtained by laminating plate-like materials composed of sapwood portions with the wooden surfaces facing in the same direction or with the wooden surfaces facing in opposite directions. , Each of which is formed as a laminated body in which the wide faces overlap. In addition, the laminated wood is formed by laminating and bonding the above-described plate-shaped materials so that each of the wide surfaces thereof overlaps, and dividing the plate-shaped materials at positions equally divided in the width direction of the plate-shaped material. You may.

According to the present invention, the sapwood portion generated when the core portion is cut out from a log (log material) can be effectively used, and the glued lumber can be formed only by the sapwood portion. It is possible to prevent wasteful consumption and reduce the cost of glued laminated wood. In addition, since the above-mentioned sapwood portion has fibers along its width direction and is a strong portion, the strength of the entire laminated wood can be ensured, and the quality of the laminated wood can be improved. Can be. Therefore, it is effective, for example, as a measure for effectively utilizing domestic cedar wood.

[0011]

1 and 2 show an embodiment of a method for manufacturing a laminated wood according to the present invention and a laminated wood formed by this manufacturing method. In these figures, reference numeral 1
Is a log (log material). As shown in FIG. 2 (a), the log 1 is cut off in the vicinity of four vertical and horizontal sides so as to exhibit a substantially square shape, so that the core member 2 is cut out of, for example, a columnar member. Is configured to do so.

When the above-mentioned core material 2 is cut out from the log 1, a sap material 3 whose cross section has an arcuate shape is formed on each of its four sides. The state of formation of such a sapwood part 3 is, for example, as shown in FIGS. 2 (a) and 2 (b).

The sapwood portion 3 obtained as described above has a platy shape by cutting off the front side of the tree in parallel with the surface of the backside of the tree, thereby forming the platy material 5 having a substantially plate shape.
This state is shown in FIG. Here, a small part indicated by 4 in the figure is used as a chip or the like, for example.
Or it is discarded. However, as is apparent from FIG. 2 (c), this portion is a slight portion, and there is no problem since most of the sapwood portion 3 proceeds to the next step and is effectively used.

As shown in FIGS. 1 (a) and 1 (b), the plate material 5 obtained as described above
Are laminated on each other so that the wide cut-off surfaces overlap each other, and the respective materials 5 are bonded and fixed via an adhesive (not shown) to form the laminated material 8. . At this time, the laminated members can be extremely easily manufactured by the above-described manufacturing method by cutting off both end portions in the width direction of the laminated member along a cutting line as shown by 7 in the figure.

In the above-described embodiment, the plate-like materials 5, 5 by the sapwood portions 3, 3 are obtained by laminating the plate-like materials 5, 5 in a state where the wooden surface faces in the same direction. It is not limited to this. For example, as shown in FIG. 4, by bonding the wood front side and the wood back side to each other, the wood front side and the wood back side are formed by the manufacturing process of the laminated wood obtained by the manufacturing method in which the wood front side and the wood back side are alternately bonded and fixed. You may.

The diameter of the above-mentioned log 1 is 200 mm.
When φ is set, the width of the back side of each of the sapwood portions 3 and 3 may be set to be, for example, 120 to 150 mm.
Further, the thickness of the above-mentioned plate material 5 is, for example, 15 m.
m.

The laminated wood 8 formed by the above-described manufacturing method has a width of 180 m, for example, as shown in FIG.
m to a thickness of 45 mm, and
It is good to use it as it is as shown in (1). In addition, instead of this trunk material, by cutting so as to be equally divided in the overall width direction, it is possible to form laminated materials 8A and 8B that can be used as, for example, a half material.

FIG. 3 shows a modification of FIG. 1 described above. In this example, each of the laminated members 9 is cut at two positions from a two-layer laminated material 9 and used as panel cores 9A and 9B. Is also good.

According to the above construction, the glued laminated members 8, 9 can be formed by the plate material 5 for forming the laminated laminated materials 8, 9 from the sapwood portions 3, 3 which were conventionally wasted. The materials 8 and 9 can be manufactured very easily, and the sap material portion 3 can be effectively used. Therefore, it is possible to prevent wasteful consumption of the lath base material, chips and the like as in the related art, and it is possible to reduce the cost of the laminated materials 8 and 9.

Further, since the above-mentioned sapwood portion 3 is a portion having fibers along the width direction and having high strength, the plate-like material 5 composed of the sapwood portions 3 is laminated so that the fibers are parallel to each other. By forming the glued laminated lumbers 8 and 9 in this way, the strength of the whole glued laminated lumbers 8 and 9 can be secured, and as a result,
The quality as 9 can be improved.

The laminated materials 8 and 9 thus obtained are
For example, it can be used as a variety of main building materials, such as a trunk material, a half-split material, a panel core material, and the like.

The present invention is not limited to the structure described in the above embodiment, and it goes without saying that the shape, structure, etc. of each part can be appropriately modified or changed. For example, FIG.
As shown in (a) and (b), the plate-like materials 5 and 5 may be bonded together with the front or back of the wood facing the same side. Further, when such members obtained by bonding the plate-like materials 5 and 5 are used in, for example, two or three steps,
It is convenient.

[0023]

As described above, according to the method for manufacturing a laminated wood according to the present invention and the laminated wood formed by the manufacturing method, the glue is generated when the core part is cut out from a log (log). The resources of the sapwood section can be used effectively, and the sapwood section alone forms the glulam, and the conventional consumption of lath base materials and chips can be eliminated. Can be planned.

In addition, since the plate-like material composed of the above-mentioned sapwood portion has fibers along the width direction of the plate and is a strong portion, the strength of the whole laminated material can be secured. The quality as a material can be improved. Therefore, the laminated timber obtained in this way can be used as various main building materials such as, for example, a trunk material, a half-split material, and a panel core material. The effect can be exerted when used as

[Brief description of the drawings]

FIG. 1 shows an embodiment of a method for manufacturing a laminated wood according to the present invention and a laminated wood formed by this manufacturing method;
(A) is a figure for explaining an outline at the time of laminating three plate-like materials obtained from a sapwood part, and (b) is a figure showing an example of a laminated wood obtained from a lamination member of (a). , (C) is (a)
It is a figure which shows another example different from (b) of the laminated wood obtained from the laminated member of (a).

FIG. 2 is a view for explaining a method of manufacturing a laminated wood according to the present invention, wherein FIG. 2 (a) is a view for explaining a state in which a core part and a sapwood part are cut out from a log (log). (B) is a diagram showing a sapwood portion obtained when the core material portion is cut out from (a), and (c) is a plate obtained by cutting the front side of the sapwood portion in parallel with the surface of the backside of the tree. It is a figure showing a shape material.

FIGS. 3A and 3B show a modification of FIG. 1, wherein FIG. 3A is a diagram for explaining an outline when two plate-like materials are laminated similarly to FIG. 1A, and FIG. FIG. 8 is a view for explaining a situation when forming a laminated material such as a panel core material from the laminated member of FIG.

FIGS. 4 (a) and 4 (b) are diagrams for explaining a state of lamination of a plate-like material which is different from FIGS. 1 and 2. FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... log (log material), 2 ... core material part, 3 ... sapwood part, 4 ... slight part, 5 ... plate material, 7 ... cutting line, 8, 9 ... laminated wood.

Claims (8)

[Claims] 1. A plate-like material having a substantially plate-like shape is prepared by preparing a sapwood portion generated when a core material portion is cut out from a raw wood, and cutting off the front side of the tree from the sapwood portion in parallel with the surface of the backside of the tree. Then, after laminating these plate-shaped materials so as to overlap each of the wide surfaces, and laminating them, an edge portion is cut off to form a laminated material, thereby producing a laminated material. Method. 2. The method according to claim 1, wherein the plate-shaped materials formed by the sapwood are laminated with the wooden surface facing in the same direction. . 3. The method of manufacturing a laminated timber according to claim 1, wherein the plate-shaped materials formed by the sapwood portions are laminated in such a manner that the wooden surfaces face in mutually opposing directions. Production method. 4. The method for manufacturing a laminated timber according to claim 1, 2 or 3, further comprising: laminating and bonding the plate-shaped materials; A method of manufacturing a laminated wood, comprising forming a laminated wood by dividing. 5. A plate-like material having a substantially plate-like shape is formed by cutting a front surface of a sapwood portion generated when a core portion is cut out from a raw wood, in parallel with a surface on a back side of the tree. A laminated wood characterized by being formed by laminating and bonding materials so that their wide faces overlap each other, and cutting off edge portions thereof. 6. The glued laminated wood according to claim 5, wherein the laminated material is formed by laminating plate-shaped materials made of the sapwood portions in such a manner that a wooden surface side faces in the same direction. 7. The laminated material according to claim 5, wherein the laminated material is formed by laminating plate-like materials formed by the sapwood portions in such a manner that a wooden surface side faces in mutually opposing directions. Wood. 8. The laminated material according to claim 5, 6 or 7, wherein the plate-shaped materials are laminated and bonded, and are divided at positions equally divided in the width direction of the plate-shaped material. A laminated wood characterized by being formed.