JP2004044105A - Drum beam for wooden building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drum beam used as a horizontal member for a structure of a wooden building capable of solving such a defect that it has a twist and a big ratio of expansion and contraction or the like, it can not be machined by a general precut processing machine because of various sizes and shapes and that it can not be used because of the great inferiority in workability. <P>SOLUTION: The side of rectangular lumber 3 is fittingly connected to a groove stripe 2 formed along the longitudinal direction on the upper surface, the rectangular lumber 3 is projected to form a projected stripe along the longitudinal direction on the upper surface. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum for a wooden building used as a structural horizontal member in a wooden building such as a wooden house.
[0002]
[Problems to be solved by the invention]
2. Description of the Related Art In recent years, as a structural material such as a pillar or a beam in a wooden frame construction method, a member processed as a dimensioned material of a predetermined standard, such as an artificially dried material or a laminated material, is frequently used. In addition, "pre-cut" processing by machining at factories has become the mainstream, instead of "chopping" work by hand processing by craftsmen, thereby streamlining the construction method and shortening the period.
[0003]
On the other hand, from nature-oriented, health-oriented, etc., there is an increasing tendency to design utilizing the texture of natural materials, such as using traditional drum beams as structural horizontal members and making them to show this. . However, drum beams have the drawbacks of being twisted and having a large expansion and contraction rate because they are raw wood, and have low value as structural materials. In addition, they have various dimensions and shapes, and cannot be processed by a general pre-cutting machine. Since a craftsman lacks the technology and experience of processing the same, no use has been made. Furthermore, in order to construct a floor on a drum beam, it is necessary to make works of the same height level.
[0004]
The present invention proposes a drum with a new configuration, aims to increase the strength against torsion and expansion and contraction, which are the drawbacks of natural materials, and to enable the same handling as dimensioned materials without the need for skills or experience. It is assumed that. The purpose of the present invention is to enable precut processing, improve the workability thereof, and promote the use of drum beams by rationalizing the construction method.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a drum beam for a wooden building according to the present invention is formed as shown in FIG. 1 and is joined by fitting a side portion of a square bar 3 into a groove 2 formed on the upper surface along a longitudinal direction. , Square members 3 protrude to form a ridge along the longitudinal direction on the upper surface. It is preferable that the square bar 3 is formed of a glued laminated wood which is unlikely to cause an irregularity or a twist.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiments of the present invention will be specifically described below with reference to the drawings.
The drawing shows an embodiment of the present invention. A drum beam 1 is formed by cutting off the left and right side surfaces of a log, sawing both edges L of a lower surface, and forming a groove 2 along a longitudinal direction on an upper surface. The side of the bar 3 is fitted and joined to the groove 2 and the bar 3 protrudes to form a convex line along the longitudinal direction on the upper surface of the drum beam 1. In this way, the square bar 3 is integrated with the drum beam 1 which is a natural material, and the square bar 3 is a square or flat square beam having a size suitable for the size of the drum beam 1, and has accurate dimensional accuracy and irregularity. Glued lumber that is unlikely to cause twisting is suitable.
[0007]
In the drum beam thus formed, the dimensions of the four edges are stable, and two flat surfaces (the upper surface of the square bar 3 and the side surface of the drum beam 1) serving as the processing reference surfaces of the processing machine line are formed. Therefore, this can be incorporated into a processing machine line, and automatic processing by pre-cutting can be performed in the same manner as in the case of dimensional materials. In addition, by constructing this drum beam with reference to the upper surface of the timber 3, it is possible to construct the floor without performing features that match the level.
[0008]
【The invention's effect】
As described above, the drum beam for a wooden building according to the present invention has a structure in which the raw wood drum beam 1 is reinforced by the square lumber 3 and the strength against twisting and expansion and contraction peculiar to natural materials is improved. It is possible to obtain suitable stable performance.
[0009]
In addition, the drum beam of the present invention can be precut, and its workability is remarkably improved, and it can be handled in the same manner as a dimensioned material without requiring any skill or experience. Can be promoted.
[0010]
Moreover, since it is a simple structure in which the timber 3 is joined to the drum beam 1, it can be manufactured at low cost and can be deployed in various standard dimensions depending on the application. By using the drum beam of the present invention, natural materials can be used. This makes it possible to easily express a design rich in texture.
[Brief description of the drawings]
FIG. 1 is a perspective view of an embodiment of the present invention.
FIG. 2 is a partial side view.
[Explanation of symbols]
1 Drum beams 2 Grooves 3 Square lumber

Claims (2)

A drum for wooden construction used as a structural horizontal member for wooden construction,
A timber beam for a wooden building, in which the side of the square bar 3 is fitted and joined to the groove 2 formed on the upper surface along the longitudinal direction, and the square bar 3 protrudes to form a convex line along the longitudinal direction on the upper surface. . The drum beam for a wooden building according to claim 1, wherein the timbers (3) are formed of laminated wood.

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