JPH08158537A - Combined woody structural material - Google Patents

Abstract

PURPOSE: To enable the formation in a large area while preventing warping, contraction, torsion and others from occurring by a method wherein one or both of flanges are made of solid material while coring is made to the innermost parts of slits provided at the flanges for fitting a rib therein, and ends of the rib are prevented from contacting with the inner circumference of the cared parts while a plurality of ribs are made installable. CONSTITUTION: A pair of flanges 11 and a rib 12 for connecting the flanges are combined together, and one or both of the flanges 11 are made of solid material. Slits 13 are provided on the flanges 11 for fitting the rib therein, and coring is made to the innermost parts of the slits for making the flanges 11 free from being distorted. The ends of the rib 12 are prevented from contact with the inner circumference of the cored parts on the innermost parts of the slits 13. Therefore, deformation occurring to the cored parts can be absorbed, preventing the entire dimension of the combined woody structural material from changing greatly. Thereby, the rate of occurrence of distorsion can be reduced greatly, contributing to stabilization of the structure.

Description

Detailed Description of the Invention

[0001]

[Object of the invention]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an I-beam composed of a wood material used for a beam of a truss structure or the like, and to a composite wood structure material using a flange peeling material.

[0002]

BACKGROUND OF THE INVENTION Recently, the motivation for the promotion of wooden structures has spread to the field of large-scale buildings such as sports facilities such as gymnasiums and music facilities such as concert halls. An I-beam composed of a laminated material as shown in FIG. 5 is used for beams such as truss structures in these large-scale wooden buildings. This I-beam has a prism-shaped flange 11 'and a plywood-shaped rib 12', and a rib fitting portion 13 '.
In addition, it can be formed as a large area, and further warped,
It is less likely to cause shrinkage, twisting, cracking, etc., and is inexpensive.

By the way, the use of small-diameter trees such as thinned timbers is limited because they do not have a sufficient diameter, and the use of resources is substantially wasted, so development of applications is required. Considering the problem of such a small diameter tree, there is room for using a thinning material or the like as the flange 11 'in the I-beam as shown in FIG. 6 (a). In such a case, however, the rib fitting slit 13' can be used. Since the structure is equivalent to "splitting" in pillars, etc., flange 1 due to drying
Although the distortion and cracking of 1'can be suppressed, the deformation amount of expansion and contraction differs between the surface on which the rib fitting slit 13 'is provided and the other surface. Therefore, some distortion is unavoidable, and the flange 11 'as shown in FIG. 6 (b).
Since the fitting between the rib and the rib 12 'becomes unstable, a thinned material such as a thinning material is not suitable for use as an I beam.

[0004]

[Technical Items Attempted to Develop] The present invention has been made in view of such a background, and it is possible to significantly reduce the occurrence rate of the distortion of the flange even if the thinning material such as the thinning material is used. This is an attempt to develop a new composite wood structural material that is stable.

[0005]

Configuration of the Invention

That is, the composite wood structural material according to claim 1 is a structural material in which a pair of flanges and ribs connecting the flanges are combined, and one or both of the flanges is a stripping material, and It is characterized in that the innermost portion of the rib fitting slit provided on the flange is cored.

Further, in addition to the requirements of claim 1, the composite wood structural material according to claim 2 is such that the tips of the ribs do not come into contact with the inner circumference of the core-removed part at the innermost part of the rib fitting slit. Is characterized by.

Further, in the composite wood structure material according to claim 3, in addition to the requirements according to claim 1 or 2, a plurality of the ribs are provided side by side with the flange. These inventions are intended to achieve the above object.

[0008]

The invention described in claim 1 is a structural material in which a pair of flanges and ribs connecting the flanges are combined, one or both of the flanges being a stripping material, and being provided on the flanges. Since the innermost part of the rib fitting slit is cored, the flange does not distort.

According to the invention described in claim 2,
Since the tips of the ribs do not contact the inner circumference of the cored-out portion at the innermost portion of the rib fitting slit, even if the hollow portion is deformed, this is absorbed. It also absorbs the distortion of the flange that occurs in the direction perpendicular to the surface on which the rib fitting slit is provided.

Further, according to the invention described in claim 3, since a plurality of the ribs are juxtaposed with the flange, the beam is constituted by the flange having a large area.

[0011]

EXAMPLE A composite wooden structure material 1 of the present invention is shown in FIG.
It is used as a beam of a large-scale building such as a gymnasium G as shown in FIG. This will be described below based on specific examples.

<Embodiment corresponding to claim 1> First, an embodiment defined in claim 1 and shown in FIG. 2 will be described. This is a structural material in which a pair of flanges 11 and ribs 12 connecting the flanges 11 are combined, one or both of the flanges 11 is a peeling material, and the innermost portion of the rib fitting slit 13 provided on the flanges. Is a composite wood structural material 1 characterized by being cored.

The rib-fitting slit 13 in the flange 11 forms a fitting portion 14 vertically to the vicinity of the central portion by a circular saw or the like with respect to the longitudinal direction of one surface of the bare cored material,
Further, the core located at the rear end of the fitting portion 14 is removed, and a core-removed portion 15 is formed in a tubular shape in the longitudinal direction. Incidentally, since the flange 11 is formed with the core-removed portion 15 in addition to the formation of the fitting portion 14 corresponding to the back split which has been conventionally performed on the core holding material when used as a pillar, a beam or the like, cracks and distortions are formed. As a result, the occurrence rate of defects of the core holding material is remarkably reduced.

As the rib 12, for example, a bare sawing plate is used, and both ends of this are fitted into the rib fitting slits 13 of the flange 11 to form an I-beam. To maintain this state, it is common to fix it with an adhesive, but if the strength is obtained by simple press fitting, it may be in that state, or as shown in FIG. Good. As the rib 12, plywood,
It is also possible to use laminated materials, metal plates, FRP, and composite materials thereof. Further, when there is no concern that one rib 12 will be hidden after the construction and the appearance of the structure will be impaired, it is not necessary to strictly perform the design finish on the invisible side.

<Embodiment Corresponding to Claim 2> Next, an embodiment defined in claim 2 and enlarged in FIG. 3 will be described. In this embodiment, the rib 12 is prevented from coming into contact with the inner circumference of the core-removed portion 15 of the rib fitting slit 13. With such a configuration, the core removing portion 15
Even if it deforms, it absorbs this and also the strain in the longitudinal direction of the flange 11.

<Embodiment Corresponding to Claim 3> Next, a composite wood structural material 2 of the type defined in claim 3 and shown in FIG. . The rib fitting slit 23 in the flange 21 forms a fitting portion 24 vertically to the vicinity of the central portion by a circular saw or the like with respect to the longitudinal direction of one surface of a sawn timber having a relatively large area, and further, the fitting portion 24. The core located at the innermost end is removed, and the cored portion 25 is formed in a tubular shape in the longitudinal direction. Since this one has the cored portion 25 formed in addition to the formation of the fitting portion 24 corresponding to the back split which has been conventionally performed on the core holding material when used as a pillar, a beam or the like.
The rate of occurrence of defects in the cored material such as cracks and strains is significantly reduced.

As the rib 22, for example, a strip of sawn wood is used, and both ends of this are fitted into the rib fitting slits 23 in the flange 21, respectively, and three ribs 22 are provided as an example. In order to maintain this state, fixing with an adhesive is generally used, but it may be fixed in that state as long as the strength can be obtained by simple press fitting, or may be fixed by penetrating a bolt or the like. As the rib 22, plywood, laminated wood, metal plate, FRP, or composite material of these may be used. Further, if there is no concern that one rib 22 will be hidden after the construction so as to impair the aesthetic appearance of the structure, it is not necessary to strictly perform the design finish on the invisible side.

As described above, if the space between the ribs 22 provided side by side is used and a heat insulating material is loaded therein, the heat insulating effect of the building is enhanced, and if activated carbon is loaded therein, an air cleaning effect such as deodorization can be achieved. can get. Furthermore, if various cables are loaded here, it is possible to obtain functions corresponding to various loaded materials, such as the wiring being not exposed and the appearance not being spoiled.

Further, as in the previous embodiment, the rib 22 does not come into contact with the inner periphery of the innermost core portion 25 of the rib fitting slit 23 as defined in claim 2. With such a configuration, even if the cored portion 25 is deformed, this is absorbed, and also distortion in the longitudinal direction of the flange 21 is absorbed.

[0020]

The present invention has the constitution as described above, and thereby exhibits the following effects. The invention described in claim 1 provides a pair of flanges 11
And a rib 12 connecting between the ribs, and one or both of the flanges 11 is a peeling material, and the rib fitting slit 1 provided in the flange 11
Since the innermost part of 3 is cored, the flange 11
Does not distort. For this reason, it is possible to configure the composite wooden structure material 1 which is excellent in aesthetics by making the best use of the wood grain peculiar to peeling wood.

According to the invention described in claim 2,
Since the tips of the ribs 12 do not come into contact with the inner circumference of the innermost core portion of the rib fitting slit 13, the inner core portion 1
Even if 5 is deformed, this is absorbed, and the overall dimensions of the composite wooden structure material 1 do not change significantly. Further, since the strain in the longitudinal direction of the flange 11 is also absorbed, even a slightly curved material can be used as the flange 11.

Further, according to the invention described in claim 3, since a plurality of the ribs 12 are juxtaposed with the flange 11, the beam can be constituted by the flange 11 having a large area. Further, when various materials are filled in the space between the ribs 22, the effect corresponding to each material can be obtained. With these, it is possible to construct a new composite wood structure material 1 having a stable structure and further excellent aesthetics by significantly reducing the strain occurrence rate of the flange 11 even when using a stripping material, and by extension, thinning material and the like. It can be used effectively.

[Brief description of drawings]

FIG. 1 is a perspective view showing a usage state of a composite wooden structure material of the present invention.

FIG. 2 is a perspective view and a side view showing the same composite wood structural material.

FIG. 3 is a side view showing a positional relationship between a rib fitting slit and a rib in a flange.

4A and 4B are a perspective view and a side view showing a composite wooden structure material provided with ribs.

FIG. 5 is a perspective view and a side view showing a conventional composite wood structural material using laminated wood.

FIG. 6 is a side view showing a distorted state of a composite wooden structural material using a peeling material.

[Explanation of symbols]

 1 Composite Wood Structure Material 2 Composite Wood Structure Material 11 Flange 12 Rib 13 Rib Fitting Slit 14 Fitting Part 15 Core Removal Part 21 Flange 22 Rib 23 Rib Fitting Slit 24 Fitting Part 25 Core Removal Part G Gymnasium

Claims (3)

[Claims] 1. A structural material in which a pair of flanges and ribs connecting the flanges are combined with each other, one or both of the flanges being a peeling material, and the innermost portion of a rib fitting slit provided in the flange being a core. A composite wood structural material characterized by being punched. 2. The composite wood structure material according to claim 1, wherein the tips of the ribs do not come into contact with the inner periphery of the innermost core portion of the rib fitting slit. 3. The composite wooden structure material according to claim 1, wherein a plurality of the ribs are provided side by side with the flange.