JPH05147010A - Laminated lumber - Google Patents

Abstract

PURPOSE:To obtain an inexpensive laminated lumber having an external appearance comparable favorably with general lumber, by a method wherein a pillarlike lumber is formed by making a plurality of ribbonlike core lumber into a piled-up layer through an adhesive layer, a decorative thin sheet is stuck to one confronting side face of the pillarlike lumber and the other confronting side face is finished into a plain face. CONSTITUTION:A plurality of ribbonlike core lumbers 5 are laminated through adhesive layers 6, through which pillarlike lumber 7 having a rectangular section is formed. Then a decorative thin sheet 8 comprised of the same kind of tree as the ribbonlike core lumber is stuck to one confronting side face 10a in the pillarlike lumber 7 where mutual adhesive layers 6 in a ribbonlike core lumber 5 are exposed. Furthermore, the other confronting side face 10b in the pillarlike lumber 7 is formed into a boardlike face 9 where the ribbonlike core lumber 5 is finished into a plain face. With this construction, a laminated lumber having an external appearance comparable favourably with general lumber comprised of one piece of lumber having an identical diameter to that of the laminated lumber can be obtained at low cost in which the faced structure is not exposed nor high-grade feeling is spoiled even if it is damaged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated material used as a columnar material such as a pillar, a beam girder or a base of a building such as a house.

[0002]

2. Description of the Related Art From the viewpoint of protecting the global environment in recent years, this seed laminated wood does not use old-gloss logs (natural wood, primary forest) of large diameter wood, which has been a problem in the United States, etc. Since core material produced from logs of small diameter trees such as timber and thinned wood (this core material is commonly called lamina in the industry) is used, there is no concern about supply in the future. Rather, their active use is encouraged in terms of protecting the global environment. By the way, as shown in FIG. 2, as the seed laminated wood, a plurality of strip-shaped core materials having a thickness of about 1.5 to 5 cm, which are mainly made of inexpensive imported wood and are sewn to a specified size, are used. 1 (lamina), and these core materials 1 are adhered together by an adhesive 2 to form a columnar material 3, and a makeup made of cypress, cedar, etc. different from the tree species of the core material 1 is formed on the entire circumference of this side surface. A laminated material having a veneered structure to which the thin plate 4 is adhered is generally used.

According to the above laminated material, since the periphery of the columnar material 3 made of the core material 1 is covered with the decorative thin plate 4, the adhesive layer 2 between the core materials 1 exposed on the side surfaces of the columnar material 3 is exposed. In addition, since it is covered with the decorative thin plate 4 made of a material higher in quality than the core material 1, it is possible to give a high-class appearance, and since the inexpensive core material 1 is used, the same solid columnar shape is used. It can be manufactured at a considerably lower cost than wood.

[0004]

According to the conventional laminated laminated structure having the decorative structure, since the adhesive layer 2 between the cores 1 is covered with the decorative thin plate 4, it is possible to use a general material having the same diameter in appearance. It can be used as a column for a high-class Japanese-style room, etc., which is not inferior to any other, but relatively expensive decorative thin plates 4 such as cypress and cedar must be adhered to the four side faces of the columnar member 3, respectively. Of course, four decorative thin plates 4 must be attached to each side surface of the columnar member 3, which is time-consuming, and the decorative thin plate 4 is considerably more expensive than the core material 1, and the price of the laminated wood is low. There is a drawback that the ratio becomes high.

Further, since the tree species of the decorative thin plate 4 is different from that of the core material 1, when the decorative thin plate 4 is damaged and the core material 1 is exposed, due to the difference in color tone and material between the decorative thin plate 4 and the core material 1, There is also a drawback that the structure has a veneer structure, and the high-class feeling is significantly impaired.

In view of the above-mentioned conventional drawbacks, the present invention has an appearance comparable to that of a general material made of a piece of wood and having the same diameter,
Moreover, it is an object of the present invention to provide a laminated material that is inexpensive and that even if it is damaged, it does not reveal that it has a veneered structure, and does not impair the high-class feeling.

[0007]

The present invention for attaining the above-mentioned object is indicated by the reference numerals shown in the embodiment of FIG. 1, and a plurality of strip-shaped core members 5 are provided with an adhesive layer 6 interposed therebetween. To form a columnar member 7 having a substantially rectangular cross section,
A decorative thin plate 8 made of a tree species of the same quality as the core material 5 is adhered to one of the opposing side surfaces of the columnar material 7 where the mutual adhesive layers 6 of the core material 5 are exposed, and the other opposing side surface of the columnar material 7 is bonded. Uses a plate-shaped surface 9 obtained by finishing the core material 1 into a flat surface.

[0008]

According to the above construction, since the adhesive layer 6 exposed on one of the opposite side surfaces of the columnar member 7 composed of a plurality of core materials 5 to be overlaid is hidden by the decorative thin plate 8, it is made of one piece of wood. It has the same appearance as a general material of the same diameter, and can be used as a high-grade column, beam girder, or foundation.

The other facing side surface of the columnar member 7 composed of a plurality of stacked core materials 5 is a plate-like surface 9 obtained by directly planarizing the core material 1, and decorative thin plates are bonded to both side surfaces. Since it does not occur, the number of decorative thin plates 8 and the labor for adhering the decorative thin plates 8 are halved as compared with the conventional case, and the manufacturing cost thereof can be reduced.

Further, since both the one side surface of the columnar member 7 and the other side surface of the other columnar member are made of the same kind of wood, they have no discomfort and have the same appearance as a general solid columnar member. Since the tree species of the decorative thin plate 8 adhered to one of the facing side surfaces of the core material 7 is of the same quality as the core material 5, and the other facing side surface is the plate-shaped surface 9 obtained by directly planarizing the core material 5,
Even if the decorative thin plate 8 is damaged and the core material 5 is exposed, since the color and material of the decorative thin plate 8 and the core material 5 are the same, it is not revealed that the decorative thin plate 8 has a makeup structure. It is possible to maintain a sense of quality.

[0011]

EXAMPLE FIG. 1 shows a laminated material which is an example of the present invention.
The columnar material 7 forming the laminated wood is almost the same as the laminated wood shown in FIG. 2, and is mainly composed of a plurality of core materials 5 made of inexpensive imported wood such as lodipole pile and white spruce. In manufacturing, a plurality of strip-shaped core materials 5 having a thickness of about 1.5 to 5 cm, which are made into specified dimensions, are dried and then bonded together by an adhesive 6 made of a resorcinol resin or the like.

The dryness of the core material 5 is set so that the water content thereof is about 10 ± 2% in order to maintain the adhesiveness with the adhesive agent 6. Thereby, the columnar material 7 of the present invention
When used as a pillar, beam girder, or foundation of a general wooden house, the equilibrium water content of the house is usually 14 to 15%, so that the shape hardly changes and the same diameter made of one piece of wood. There is no danger of drying and cracking like general materials. Therefore, there is an advantage that it is strong against bending stress and compressive stress.

Of the columnar members 7, the adhesive layer 6 between the core members 5
A decorative thin plate 8 having a thickness of about 1.2 mm and having the same quality as the core material 5 is adhered to the opposite side surfaces 10a, 10a where the edges of the are exposed by an adhesive for makeup application. The adhesive layer 6 exposed on the front and rear side surfaces 10a, 10a of the columnar member 7 is hidden.

The left and right facing side faces 10 of the columnar member 7 are also provided.
b, 10b, among the plurality of core materials 5 laminated on each other,
The wood grain of the core material 5 at both ends is exposed, and the core material 5 at both ends is formed into a plate-shaped surface 9 which is finished by cutting, thereby forming, for example, a prismatic laminated material having a side of 103 mm. It

Therefore, the decorative thin plate 8 is exposed on one of the opposite side surfaces around the columnar member 7, and the plate-shaped surface 9 of the core material 5 itself is exposed on the other opposite side surface. Since the same kind of wood as the material 5 is used and the color tone and material of the core material 5 and the decorative thin plate 8 are the same, it seems that the boundary portion 11 between the plate-like surface 9 and the decorative thin plate 8 is integrally connected. It does not look conspicuous and does not spoil the appearance.

Therefore, the decorative thin plate 8 is damaged,
Even if the core material 5 is exposed, since the decorative thin plate 8 and the core material 5 have the same color tone and material, it is possible to maintain a high-class feeling without revealing that the makeup material is a makeup structure.

According to the above construction, the two decorative thin plates 8 are used, and the number of the decorative thin plates 8 and the labor for adhering the decorative thin plates 8 are halved as compared with the laminated material having the decorative tension structure shown in FIG. Therefore, the manufacturing cost can be remarkably reduced.

The decorative thin plate 8 can be manufactured by selecting a high-quality core material 5 and cutting it into slices, and it is not necessary to specially prepare wood for the decorative thin plate 8. Also, the material cost can be reduced.

[0019]

As described above, according to the present invention, it is possible to halve the number of decorative thin plates and the time required to bond the decorative thin plates, as compared with the conventional laminated laminated wood, and to reduce the manufacturing cost. You can contribute.

Further, according to the present invention, since the tree species of the decorative thin plate is of the same quality as the core material, it can be revealed that even if the decorative thin plate is damaged and the core material is exposed, it is a veneered structure. It is possible to maintain a sense of luxury for a long time.

Further, according to the present invention, as described above, the decorative thin plate forming the laminated wood and the core material are of the same quality, and even if a cut is made in the decorative thin plate or the plate-like surface adjacent to the decorative thin plate, the external appearance is improved. Since the appearance is not impaired, it becomes possible to perform hole processing and grooving processing (precut processing) in advance in a processing factory, which contributes to the ease and speed of field work.

[Brief description of drawings]

FIG. 1 is a perspective view of a laminated material which is an embodiment of the present invention.

FIG. 2 is a perspective view showing a conventional laminated member.

[Explanation of symbols]

 5 Band-shaped core material (lamina) 6 Adhesive layer 7 Columnar material 8 Decorative thin plate 9 Plate-shaped surface 10a One side surface of the columnar material 10b Other side surface of the columnar material

Claims (1)

[Claims] 1. A columnar material having a substantially rectangular cross section is formed by stacking a plurality of strip-shaped core materials with an adhesive layer interposed therebetween, and one of the columnar materials in which the mutual adhesive layers of the core material are exposed. A laminated thin plate made of the same kind of wood as that of the core material is adhered to the opposite side surface of the core material, and the other opposite side surface of the columnar material is a plate-like surface obtained by planarizing the core material.