JP2007146449A - Building board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mountain-warped building board in which rectangular wood plate materials are laminated together. <P>SOLUTION: In this building board 11, a base material 12 is formed by laminating the rectangular plate materials of five layers (a first layer 12a, a second layer 12b, a third layer 12c, a fourth layer 12d, and a fifth layer 12e). The building board is formed in such a manner that the moisture contents of the rectangular plate materials of the even layer on the basis of count from the first layer 12a is set higher than those of the rectangular plate materials of the other add layers. A back groove 14, which ranges from the backside 13 of the building board 11 to the rectangular plate material 12b of the second layer, is formed; wood fibers of the rectangular plate material of the add layer are arranged in a longitudinally longer manner; and wood fibers of the rectangular plate material of the even layer are arranged in a laterally longer manner. Additionally, since the wood fibers of the second layer more greatly shrink in a short-side direction than in the longitudinal direction, the shrinking force is applied in the longitudinal direction more greatly than in the short-side direction to the first layer 12a, and the second and fourth layers dry, shrnk and warp in a mountain shape after the working of the back groove. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a building board that is directly attached to a floor of a house or the like, and more particularly to a building board that generates very little warpage.

  Conventionally, especially in a concrete building, a wooden building board is required to prevent floor noise. In order to obtain soundproof performance, such a building board forms a gap by processing a back groove from the back side of the building board formed by laminating rectangular wooden boards, and a cushioning material is attached to the back side of the building board. Such a configuration is known.

  However, changes in the moisture content of the wooden material of the building board, changes in the moisture content of the adhesive when laminating the cushion material on the back side of the building board and the decorative sheet on the front side, and expansion and contraction of the decorative board and paint film, etc. Therefore, there was a problem that the building board warped in the final product. There are two types of warpage, a concave surface warp and a convex surface warpage, and twisting due to a combination of these may occur.

  Here, there is no problem in particular when the building board is not warped and warped, but in the case of valley warping, the workability and productivity of the cutting process at the time of subsequent processing are significantly reduced. When floor construction is performed, the joint portion of each building board floats up from the surroundings, so that it cannot be placed horizontally, resulting in poor finished appearance and quality problems.

  A construction of a building board that solves these problems is disclosed in Patent Document 1. As shown in FIG. 4, the direct pasting floor material 4 </ b> A of Patent Document 1 includes a cushion material 5 on the lower surface side 3 a of a building board 3 composed of a rectangular wooden material 2 and a decorative board 1. A back groove 6 is formed on the building board 3 from the back side, and at least the opening 6 a of the back groove 6 is filled with the elastic adhesive 7.

Thus, since the periphery of the opening part of the building board 3 is physically restrained by the elastic adhesive 7, even if stress is applied to the direction in which the building board 3 warps, the building board 3 is opened in the direction in which the back groove 6 opens. Deformation can be prevented. For this reason, it becomes difficult to generate | occur | produce a curvature in the building board 3, and construction can be performed easily.
Registered Utility Model No. 3025757

  However, even if the periphery of the opening of the building board is physically constrained by the elastic adhesive, the shrinkage balance between the front side and the back side of the building board is broken due to fluctuations in moisture content over time, and valley warpage occurs. was there.

  Therefore, the present invention has been made in view of the problems of the related art, and provides a building board having a mountain warp (including a state in which there is no warpage) in the final product in a building board formed by laminating rectangular wooden materials. For the purpose.

  The invention of claim 1 is a building board formed by laminating a plurality of rectangular wooden materials, wherein the moisture content of the even-numbered rectangular wooden materials counted from the surface layer is the moisture content of the other odd-numbered rectangular wooden materials. It is characterized by being formed higher than.

  Invention of Claim 2 is the building board of Claim 1, Comprising: From the back surface side of the said building board, the back groove | channel covering the said rectangular wooden material of a 2nd layer is counted from a surface layer. It is a feature.

  According to invention of Claim 1, it is a building board which laminates | stacks a some rectangular wooden material, Comprising: The water content of the said rectangular wooden material of the even-numbered layer counted from the surface layer is another odd-numbered rectangular wooden material Since the water content of each rectangular wooden material decreases as time elapses and the rectangular wooden material shrinks over time, the water content of the rectangular wooden material in the even layer is reduced at this time. Since the ratio of water content drop is higher than the water content of the other odd-numbered rectangular wooden materials (the amount of evaporated water is large), the even-numbered layer contracts more than the odd-numbered layer, so that the building board with the mountain warp Can be formed.

  Since the building board of the arched warp is formed, the productivity and processing accuracy in the post process are improved, and the finished quality at the time of floor construction is improved.

  According to invention of Claim 2, since the back groove | channel covering the said rectangular wooden material of the 2nd layer is counted from the surface layer from the back surface side of the said building board, the evaporating moisture from each rectangular wooden material is Easily discharged to the outside through the back groove.

  For this reason, since the time required for the moisture content reduction of each rectangular wooden material is accelerated and the time for each rectangular wooden material to shrink to the normal state can be shortened, the same effect as the effect of the invention of claim 1 can be obtained. You can get faster.

<First Embodiment of the Present Invention>
Below, the 1st Embodiment of this invention is described based on FIG. 1, FIG. In the following description, “mountain warp” includes a state where there is no warp.

<Configuration of building board>
As shown in FIG. 1, the building board 11 as a direct pasting floor material of the present invention is a five-layered rectangular board material (first layer 12a, second layer 12b, third layer 12c, fourth layer as a base material 12). 12d and 5th layer 12e) are stacked, and when the building board 11 is formed, the moisture content of the even-numbered rectangular plate materials 12b and 12d counted from the first layer 12a of the surface layer is the other odd-numbered rectangular plate material 12a. , 12c, and 12e.

  And in order to acquire a soundproofing and a cushion effect, the back groove | channel 14 ranging from the back surface side 13 of the building board 11 to the rectangular board material 12b is provided.

  The substrate 12 has a thickness S = 9 mm, 5 plies (5 layers), and the back groove has a width T = 6 mm to 6.5 mm and a depth S1 = 6 mm, and is formed over the second layer 12b.

  Further, the cushion material 15 is laminated on the back surface side 13 of the building board 11 with a thickness S2 = 1.5 to 5 mm.

  Here, the wood fibers are arranged so as to be long along the longitudinal direction of the odd-numbered rectangular plate members 12a, 12c, and 12e, and the wood fibers of the even-numbered rectangular plate materials 12b and 12d are so long that the wood fibers are long in the short direction. Are lined up. In this way, the odd-numbered and even-numbered wood fibers are laminated by crossing 90 degrees.

  At the time of building board formation, the first layer 12a, the third layer 12c, and the fifth layer 12e are in a normal dry state (water content is about 7%), but the second layer 12b and the fourth layer 12d have a water content. Lamination is performed via an adhesive set to about 15% to 30%. Then, cutting, processing, and finishing processes are performed in the same manner as a normal building board.

<Function of building board>
As the building board 11 elapses with time, the water evaporated from the second layer 12b is discharged to the outside through the back groove 14, and therefore the second layer 12b is dried (moisture content decreases), so the second layer 12b. Shrinks in the long and short directions.

  Here, the wood fiber has a property of shrinking more in the short direction than in the longitudinal direction of the fiber. For this reason, the force that the second layer 12b contracts greatly in the lateral direction affects the force that causes the first layer 12a to contract more in the longitudinal direction.

  For this reason, as shown in FIG. 2, the building board 11 is warped in the direction of the arrow M. Here, the fourth layer 12d is processed in a state of high moisture content like the second layer 12b, so that the contraction force is higher than that of the other odd layers. However, since the edge is cut off, the warp effect in the longitudinal direction of the building board 11 is less than that of the second layer 12b.

  The fourth layer 12d is not affected by the back groove 14 in the short direction of the building board 11, but in this case, the wood fiber contracts more in the short direction than in the longitudinal direction of the fiber as described above. Due to the nature, there is an effect on the short direction of the building board 11 of the fourth layer 12d, but it is very small.

  Thus, the base material 12 formed of five layers of rectangular plate materials (the first layer 12a, the second layer 12b, the third layer 12c, the fourth layer 12d, and the fifth layer 12e) is the second layer 12b · 4. If the moisture content of the layer 12d is increased, the second and fourth layers are dried and shrunk after the back groove 14 is processed, so that the building board 11 can be easily warped.

  As described above, the building board 11 is warped (substantially flat) in the manufacturing process, so that it can be processed and painted in the same manner as a normal building board, so that productivity and processing accuracy are improved. In the final product state, the building board 11 is warped, so that the workability at the site is improved.

  It can be easily adjusted to be warped simply by finely adjusting the moisture content of the second layer 12b to which the back groove 14 reaches.

  As described above, “mountain warpage” in the present embodiment includes “state without warp”, but it is difficult to realize a state without warpage at all, so that it is practically possible to “state without warp” as much as possible. It is adjusted to a close “hill warp” condition.

<Second Embodiment of the Present Invention>
Although the 2nd Embodiment of this invention is described using FIG. 3, about the structure and the same structure part of the building board shown in FIG. 1, the same code | symbol is attached | subjected to drawing and the overlapping description is abbreviate | omitted.

  As shown in FIG. 3, the construction board 11a has a structure in which the base material 12 is a five-layer rectangular plate (first layer 12a, second layer 12b, third layer 12c, fourth layer 12d, fifth layer 12e). It is formed by laminating, and the moisture content of the even-numbered rectangular plate materials 12b, 12d counted from the surface layer 12a is higher than the moisture content of the other odd-numbered rectangular plate materials 12a, 12c, 12e. . (The back groove 14 shown in FIG. 1 is not formed.)

  The building board 11a is not immediately effective because the back groove 14 in FIG. 1 is not formed, but with the passage of time, the second layer and the fourth layer evaporate more moisture than the first layer, the third layer and the fifth layer. Since it dries (drys) and shrinks more, the building board 11a is warped in the direction of arrow N.

  As mentioned above, although embodiment of this invention was described based on drawing, all said Example shows an example of this invention, and it cannot be overemphasized that this invention should not be limited to these.

  For example, even when the five-layer configuration of the base material 12 is such that the wood fibers are long in the short direction of the odd-numbered rectangular plate members 12a, 12c, and 12e and the wood fibers are long in the longitudinal direction of the even-numbered rectangular plate materials 12b and 12d. It is the same. In this case, when the second layer and the fourth layer are dried and contracted, the building boards 11 and 11a are formed to have a warp in the lateral direction.

  The structure of the building board 11 is 3 fly, 7 fly, cross plywood, etc., or a case where a decorative board is pasted on the surface side of the base 12 or an MDF material is inserted between the base 12 and the decorative board The same can be applied to various structures such as. The cross-sectional shape and depth of the back groove 14 can be formed in various shapes such as a V shape and a U shape.

It is sectional drawing which shows the structure state of the building board 11 in the 1st Embodiment of this invention. It is sectional drawing in which the building board in the 1st Embodiment of this invention shows the state of a mountain curvature. It is sectional drawing which shows the structure state of the building board 11a in the 2nd Embodiment of this invention. It is sectional drawing which shows the state of the building board 3 in a prior art example.

Explanation of symbols

11 Building board 12 Base material 12a Rectangular board (1st layer)
12b Rectangular plate (2nd layer)
12c Rectangular plate (3rd layer)
12d Rectangular plate (4th layer)
12e Rectangular plate (5th layer)
13 Back side 14 Back groove

Claims (2)

A building board made by laminating a plurality of rectangular wooden materials,
A building board, wherein the moisture content of the even-numbered rectangular wood materials counted from the surface layer is higher than the moisture content of the other odd-numbered rectangular wood materials.   2. The building board according to claim 1, wherein a back groove extending from the back surface side of the building board to the rectangular wood material of the second layer is counted from the surface layer.

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