JPH0957714A - Laminated material of bamboo for structure and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ideally meet requirements for manufacturing cost and temperature change, and increase the strength, in a laminated material of bamboo for a structure to be used for a wooden building and a method to manufacture the laminated material. SOLUTION: A bamboo stalk is cut to obtain bamboo splits, each having an arc cross section, and these splits are pressed with a hot and high pressure steam, and dried and molded into flat boards. A bamboo split layer 4 consisting of the flatly molded splits spread like a plane, and a veneer 5 of sawn lumber are alternately lapped over each other, and stuck together by lamination. Thus this laminated material 10 for structure has an adequate strength required as a structural material, although the bamboo material is used. In addition, the cost of this laminated material 10 is less than that of a conventional laminated material for structure and is highly resistant against a temperature change.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a beam of a wooden building,
The present invention relates to a structural laminated wood used as a structural member such as a pillar or a structural panel and a manufacturing method thereof, and particularly to a structural laminated wood using bamboo and a manufacturing method thereof.

[0002]

2. Description of the Related Art Conventionally, as a structural laminated wood used for a wooden building, there has been known one in which a large number of wooden lamina made of wood having a small cross section are laminated and adhered. Such structural laminated timber can effectively use wood resources by using timber with a small cross section, so that cost can be reduced compared to lumber, and a large number of wooden lamina are laminated. Bonding has an advantage that a free cross-sectional shape and size can be obtained, and it is easy to keep the quality constant.

[0003]

However, the conventional structural laminated lumber as described above, even if it utilizes a wood having a small cross section, is expensive because the wood itself to be used has a high cost. It was not possible to sufficiently reduce the cost of laminated wood, and it was not possible to sufficiently cope with temperature changes.
Further, conventionally, a plywood using bamboo has been proposed, but this plywood cannot be used as a pillar, a beam, or a structural panel because of its insufficient strength as a structural material of a wooden building.

The present invention has been made in order to solve the above-mentioned problems, and is superior to the conventional structural laminated members in terms of cost of the structural laminated members and response to temperature change.
Moreover, it is an object of the present invention to provide a structural laminated lumber for a wooden building using bamboo, which is superior in strength to plywood made of conventional bamboo, and a method for manufacturing the same.

[0005]

In order to achieve the above object, a structural laminated wood using a bamboo material according to the invention described in claim 1 is a structural member such as a beam, a pillar or a structural panel of a wooden building. A structural laminated wood used as, which is a laminated bamboo in which a plurality of split bamboos formed into a flat plate by pressing with high-temperature and high-pressure steam and a single plate made of lumber are alternately laminated and bonded.

According to the above construction, the split bamboo is formed into a flat shape by pressing with steam at high temperature and high pressure, so that the work of sterilizing the split bamboo and removing oil can be performed simultaneously with the forming work of the split bamboo. As a result, the production process can be simplified and the production cost can be reduced. In addition, since the cost of bamboo is generally lower than that of wood, the cost of the material can be reduced by using bamboo. Since bamboo is more resistant to temperature changes than general wood, It can be made resistant to temperature changes. Further, by alternately laminating a plurality of split bamboos formed into a flat plate shape and a single plate made of lumber as described above and adhering them together, the strength can be increased as compared with the case where only split bamboos are stacked. It can be used as a structural material.

The structural laminated wood using the bamboo material according to the second aspect of the present invention is a structural laminated wood used as a structural member such as a beam, a pillar or a structural panel of a wooden building. It is a laminated bamboo in which a plurality of split bamboos, which are formed into a flat plate shape by pressing with high-temperature and high-pressure steam, and structural plywood are alternately laminated and bonded together.

According to the above construction, the split bamboo is formed into a flat shape by pressing with steam at high temperature and high pressure, so that the work of sterilizing the split bamboo and removing oil can be performed simultaneously with the work of forming the split bamboo. As a result, the production process can be simplified and the production cost can be reduced. In addition, since the cost of bamboo is generally lower than that of wood, the cost of the material can be reduced by using bamboo. Since bamboo is more resistant to temperature changes than general wood, It can be made resistant to temperature changes. Further, the strength can be further increased by alternately laminating a plurality of the split bamboos formed in the flat plate shape and the structural plywood as described above, and adhering the structural plywoods, and the utilization as a structural material is expanded.

Further, the connecting member according to the invention described in claim 3 is the bamboo material according to claim 1 or 2, which is used for a joint or a joint between structural members of a wooden building. A connecting member made of a structural laminated material, in which a part of the connecting member is fitted into and bonded to a recess formed in a joint or a joint portion of one member to be joined, and a connecting member protruding from this member. The other part of the member is fitted in a recess formed in the joint or the joint of the mating member to be joined and tightly connected to the mating member.

According to the above structure, a part of the connecting member is fitted into and bonded to the recess formed in the joint or the joint portion of one member to be joined, and the other connecting member protruding from this member. Since the portion is fitted into a recess formed in a joint or a joint portion of a mating member to be joined and tightly connected to the mating member, the strength of the joining portion against shearing can be improved, and the member to be joined It is possible to firmly bond each other.

Further, a method for manufacturing a structural laminated lumber using a bamboo material according to a fourth aspect of the present invention is a beam of a wooden building,
A method for manufacturing structural laminated wood used as a structural member such as a pillar or a structural panel, in which a split bamboo whose cross section is cut into an arc shape is pressed with high-temperature and high-pressure steam, dried, and then formed into a flat plate shape. And a step of laminating and bonding a plurality of split bamboo layers in which the split bamboos formed by this step are arranged side by side and a plurality of veneer made of lumber or structural plywood alternately. Is.

According to the above method, the bamboo piece is cut into an arc-shaped cross section, pressed with high-temperature and high-pressure steam, and then dried to form the split bamboo into a flat plate shape.
The sterilization and oil removal work of the split bamboo can be performed simultaneously with the forming work of the split bamboo. As a result, the production process can be simplified and the production cost can be reduced. In addition, the split bamboo layers formed by this process are arranged in a plane, and the split bamboo layers and a plurality of veneered timber or structural plywood are alternately laminated and bonded together. The strength of the laminated wood can be increased as compared with the case where only split bamboo layers are laminated, and it can be used as a structural material.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a structural laminated wood material using a bamboo material according to the present invention will be described below with reference to the drawings. 1A is a perspective view of a bamboo stalk, FIG. 1B is a perspective view of a split bamboo, and FIG. 1C is a perspective view of the split bamboo after being formed into a flat plate shape. First, the split bamboo 2 used for the structural laminated wood according to the present invention.
The molding method will be described with reference to FIG. FIG.
As shown in (a), a bamboo stalk 1 is vertically split to form an appropriate number of split bamboos 2, for example, two or three split bamboos 2 having an arc-shaped cross section. A partition-shaped node (not shown) on the peripheral surface side is cut off.

Next, the split bamboo 2 is pressed with high-temperature and high-pressure steam. The split bamboo 2 is softened by high-temperature steam and is deformed from an arc shape to a flat shape by pressing at high pressure. Then, when the split bamboo 2 is deformed into a flat plate shape, it is rapidly dried by high frequency or the like. As a result, the split bamboo 2 is formed into a flat plate with cracks as shown in FIG. It is possible to prevent the cracks from occurring by performing the pressing work for a long time, but here, in order to shorten the time required for molding, a molding method that causes the cracks is adopted. Further, the ridge-like knots 3 on the outer surface of the split bamboo 2 are cut so that the surface becomes completely flat.

Next, the split bamboo 2 molded as described above.
A method of stacking the layers to obtain a structural laminated material will be described with reference to FIG. FIG. 2 is a perspective view showing a state in which the split bamboo 2 after forming and a single plate made of a lumber are alternately laminated, and a part of the structural laminated wood produced by this lamination. As shown in FIG. 2, a split bamboo layer 4 in which the above-mentioned split bamboo 2 is arranged in a plane and a single plate 5 made of lumber are alternately laminated and laminated, and an adhesive or the like is used. To glue. This veneer 5
For this, wood such as hardwood or conifer may be used.
By laminating in this way, the structural laminated material 10 is obtained. In the stacking of the split bamboo layers 4, the split bamboos 2 are stacked so that the pulling and arranging directions are sequentially orthogonal to each other, and further, the surface of the structural laminated material 10 is made into the veneer 5. By doing so, it is possible to obtain the structural laminated member 10 which has the strength required as the structural member despite using the bamboo material, and which is lower in cost and stronger in temperature change than the conventional structural laminated member. . The structural laminated wood of the present embodiment is suitable for use as a load bearing wall, and FIG. 2 shows only a part thereof.
In this case, the single plates 5 and 5 located on the outermost surfaces in the drawing are the front and back surfaces of the wall. In the figure, the split bamboo layers 4 and the veneer boards 5 are alternately laminated one by one, but the present invention is not limited to this, and for example, two continuous veneer boards 5 and the split bamboo layers 4, or The two continuous split bamboo layers 4 and the single plate 5 may be sequentially and repeatedly laminated.

Another embodiment of the structural laminated member 10 will be described with reference to FIG. 3A and 3B are perspective views showing another embodiment of the structural laminated member 10. FIG.
The structural laminated lumber 10 shown in (a) is a split bamboo 2 of each split bamboo layer 4.
The drawing directions are arranged in the same direction. Further, the structural laminated wood 10 shown in FIG. 3 (b) is formed by stacking a plurality of single plates 5 and split bamboo layers 4 so as to overlap each other. By doing so, it is possible to obtain the structural laminated material 10 which has the strength required as the structural material and which is lower in cost than the conventional structural laminated material and is resistant to temperature change. Then, when the split bamboo layer 4 or the veneer 5 having the desired length is obtained, the split bamboo layer 4 or the veneer 5 may be used as it is, but the split bamboo layer 4 with the desired length is obtained. Alternatively, when the veneer 5 cannot be obtained, a concavo-convex portion is formed at the end of the split bamboo layer 4 or the veneer 5 in the length direction, and the end faces of the split bamboo layer 4 or the veneer 5 are adhesively connected (finger). Adhesion by a joint, etc.), and the split bamboo layer 4 or veneer 5 of a long product having a desired length is formed and used. The structural laminated material 10 of the present embodiment is suitable for use as a pillar, and in this case, the longitudinal direction shown in FIG. 3 is used as the longitudinal direction of the pillar. In this case, if the veneers 5 and 5 are located on the outermost side in the stacking direction and the veneers are separately attached to both sides where the stacking is visible, the entire circumferential surface of the pillar becomes a veneer, which is aesthetically pleasing. Also, it is effective in improving strength.

In the above embodiment, the structural laminated material 1 is used.
Although the laminated material used for No. 0 is the split bamboo layer 4 and the veneer 5, a structural plywood may be used instead of the veneer 5.
When structural plywood is used, even greater strength is obtained than when single plate 5 is used, and the application of structural laminated wood 10 can be expanded.

Next, a connecting member using the structural laminated member 10 will be described. FIG. 4 is a perspective view showing a state where the structural laminated wood 10 is used as a connecting member for a joint or a joint between structural members of a wooden building. In this case, a part of the structural laminated member 10 is cut into a suitable size and fitted as a connecting member 20 into a recess 21a formed in a joint or a joint of one member 21 to be joined. Are glued together. The other portion of the connecting member 20 projecting from the member 21 is fitted into the recess 22a formed in the joint or the joint of the other member 22 to be joined. The connecting member 20 is provided in the recess 22a of the other member 22.
After being inserted, the member 22 and the connecting member 20 are
It is fixed by tightening with a bolt 23 and a nut 24 that pass through them. As described above, by using the structural laminated material 10 as the connecting member 20, the strength of the bonded portion against shearing is increased, and the bonding between the members to be bonded becomes strong.

[0019]

As described above, according to the structural laminated wood using the bamboo material according to the invention of claim 1, since the split bamboo which is formed into a flat shape by pressing with high temperature and high pressure steam is used, The sterilization and oil removing work of the split bamboo can be performed at the same time as the split bamboo forming operation, the production process is simplified, and the cost for producing the split bamboo formed on a flat surface is reduced. Further, since the cost of bamboo is generally lower than that of wood, it is possible to reduce the cost of the material by using bamboo, and since bamboo is more resistant to temperature changes than general wood, The material can be made resistant to temperature changes. Furthermore, as described above, a split bamboo formed into a flat plate shape,
Since a plurality of single boards made of lumber are alternately laminated and bonded together, the strength can be improved as compared with the case where only bamboo is laminated, and it can be used as a structural material.

Further, according to the structural laminated wood using the bamboo material according to the second aspect of the present invention, since the split bamboo formed into a flat shape by pressing with high temperature and high pressure steam is used, the split bamboo is sterilized. Also, the oil removing operation can be performed at the same time as the split bamboo forming operation, the production process is simplified, and the cost for producing the split bamboo formed on a plane is reduced. Further, since the cost of bamboo is generally lower than that of wood, it is possible to reduce the cost of the material by using bamboo, and since bamboo is more resistant to temperature changes than general wood, The material can be made resistant to temperature changes. Furthermore, since a plurality of split bamboos formed in a flat plate shape as described above and structural plywood are alternately laminated and laminated and adhered, when only split bamboos are laminated or a single plate made of split bamboo and lumber is used. It is possible to further improve the strength as compared with the case of stacking, and it is possible to expand the use as a structural material.

Further, according to the connecting member of the third aspect of the present invention, a part of the connecting member is fitted and bonded in a recess formed in a joint or a joint portion of one member to be joined, Since the other part of the connecting member protruding from this member is fitted and tightly fitted in the recess formed in the joint or the joint of the mating member to be joined, the strength of the joined portion against shearing can be improved. The members to be joined can be firmly joined together.

Further, according to the method for manufacturing a structural laminated lumber using a bamboo material according to the invention of claim 4, the bamboo material is cut so that its cross section becomes an arc shape, pressed by high temperature and high pressure steam, and then dried. By doing so, the split bamboo is formed into a flat plate shape, so that the work of sterilizing the split bamboo and removing oil can be performed at the same time as the split bamboo forming operation. As a result, the production process can be simplified and the production cost can be reduced. In addition, the split bamboo layers formed by this process are arranged in a plane, and the split bamboo layers and a plurality of laminated veneer timber or structural plywood are alternately laminated and bonded together. The strength can be improved as compared with the case of stacking, and the laminated wood produced by these steps can be used as a structural material.

[Brief description of drawings]

1A is a perspective view of a bamboo stalk, FIG. 1B is a perspective view of a split bamboo, and FIG. 1C is a perspective view of a split bamboo after being formed into a flat plate shape.

FIG. 2 is a perspective view showing a state where plate-shaped split bamboo and veneer made of lumber are alternately laminated, and a structural laminated material according to an embodiment of the present invention produced by this lamination. is there.

3 (a) and 3 (b) are perspective views showing another embodiment of the structural laminated material.

FIG. 4 is a perspective view showing a state where the structural laminated wood is used as a connecting member for a joint or a joint between structural members of a wooden building.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bamboo material 2 Split bamboo 4 Split bamboo layer 5 Veneer 10 Structural laminated wood 20 Connecting members 21, 22 Members 21a, 22a Recesses

Claims (4)

[Claims] 1. A structural laminated lumber used as a structural member such as a beam, a pillar or a structural panel of a wooden building, which comprises split bamboo formed into a flat plate shape by pressing with high temperature and high pressure steam, and lumber. A laminated laminated wood structure made of bamboo characterized by alternately laminating a plurality of single plates and laminating and adhering. 2. A structural laminated wood used as a structural member such as a beam, a pillar or a structural panel of a wooden building, which is a split bamboo formed into a flat plate shape by pressing with high temperature and high pressure steam, and a structural plywood. A laminated laminated wood structure made of bamboo, characterized in that a plurality of and are alternately laminated and bonded together. 3. A connecting member, which is used as a joint or a joint between structural members of a wooden building, and which is made of a structural laminated wood using a bamboo material according to claim 1 or 2. A part of the member is fitted into and bonded to a recess formed in a joint or a joint of one of the members to be joined, and the other part of the connecting member protruding from this member is
A connecting member which is fitted in a recess formed in a joint or a joint portion of a mating member to be joined and tightly connected to the mating member. 4. A method for manufacturing a structural laminated lumber used as a structural member such as a beam, a pillar or a structural panel of a wooden building, wherein a split bamboo whose cross section is cut into an arc shape is pressed by high temperature and high pressure steam. After that, a step of drying and shaping into a flat plate shape, a split bamboo layer in which the flat plate shaped split bamboos are arranged in a plane shape, and a plurality of laminated veneer lumber or structural plywood are alternately laminated. A method of manufacturing a structural laminated wood using a bamboo material, which comprises a step of laminating and adhering.