JPH052721Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention mainly relates to a structure for preventing sinking of wooden truss beams in wooden houses such as frame wall construction methods.

(Prior Art) The wooden truss beam as described above is usually supported by placing the lower ends of both ends on the upper ends of the mullion members.

Therefore, all loads acting on the wooden truss beam are applied to its supports and transmitted to the mullions through the supports.

(Problem that the invention aims to solve) However, wood is generally weak against loads from a direction perpendicular to the fiber direction, and when a large load is applied, sinking may occur in the area where the load is applied. In the case of a beam, the load acts on the lower chord member supported at the upper end of the mullion in a direction perpendicular to the fiber direction, so if a large load is applied due to snow accumulation or other reasons, the lower chord member There was a risk that the bottom surface would sink in, leading to problems such as poor installation and damage to parts.

The present invention can solve the above problems.
The purpose is to provide a structure that prevents wood truss beams from sinking in.

(Means for solving the problem) In order to achieve the above object, the present invention prevents the lower chord of the wooden truss beam from sinking between the wooden truss beam and the mullion that supports the lower part of the wooden truss beam. It is characterized by interposing reinforcing hardware for use.

(Function) As mentioned above, since the reinforcing hardware to prevent the bottom chord of the wooden truss beam from sinking in is interposed between the wooden truss beam and the mullion, both ends of the bottom chord are It can be reinforced and the allowable strength against sinking can be increased.

(Embodiments) Preferred embodiments of the present invention will be described below based on the drawings.

Reference numeral 1 denotes a wooden truss beam, which is composed of an upper chord member 2, a lower chord member 3, and a connecting member 4 connecting these members. Note that the connecting portions of the truss are connected and reinforced by nail plates 5 and the like.

Reference numeral 6 denotes a mullion that is arranged vertically on both sides of the wooden truss beam 1 and supports both ends of the wooden truss beam 1 on its upper end. A frame material with a cross section of 2 inches and 4 inches on the other side is used. (In Figure 1, only the right side of the figure is shown.) 7 has a U-shaped cross section, and is fitted from below to the lower surface of both ends of the lower chord member 3 of the wooden truss beam 1, and is inserted into the upper end of the mullion member 6. This is a first reinforcing hardware that reinforces both ends of the lower chord member 3 placed and supported by the lower chord member 3 to prevent the lower chord member 3 from sinking in, and the contact surface with the lower surface of the lower chord member 3 is
It has a second reinforcing hardware 8 such as a buffer iron plate.

A vertical load from the upper part of the building is applied to the wooden truss beam 1 as described above, and this load is transmitted from both ends to the mullions 6 that support the wooden truss beam 1.

When a large load is applied to a building due to snowfall, etc.
Not only in the design of an architectural structure using the wooden truss beam 1 of the present invention, but in the case of a wooden beam in general, it is inevitable that the support portions at both ends of the wooden beam will sink in over time.

That is, a large load also acts on the support portion of the wooden truss beam 1, and this causes the lower chord member 3 of the wooden truss beam 1 to
Since the load is from a direction perpendicular to the fiber direction,
Although sinking had occurred on the lower surface of the lower chord member 3, this part could be reinforced by providing the first reinforcing hardware 7 for preventing sinking at both ends of the lower chord member of the wooden truss beam 1 as in this embodiment. Because of this, the lower chord material 3
The allowable resistance against sinking can be increased.

Moreover, even if the first reinforcing metal fitting 7 is thin, deformation of the first reinforcing metal fitting 7 can be effectively prevented by the second reinforcing metal fitting 8.

Note that the shape, wall thickness, etc. of the first reinforcing hardware 7 and the second reinforcing hardware 8 can be set arbitrarily according to design conditions, and the second reinforcing hardware 8 can be omitted depending on the conditions. It goes without saying that various modifications are possible without departing from the gist of the present invention.

(Effects of the invention) As detailed above, according to the invention, reinforcing hardware is interposed between the wooden truss beam and the mullion supporting the truss, so that the bottom chord of the wooden truss beam sinks into place. It is possible to increase the allowable proof stress for

Therefore, even if a large load is applied, it is possible to prevent the lower chord material from sinking in, and it is possible to reliably eliminate problems such as deterioration of installation and damage to members due to sinking.

[Brief explanation of the drawing]

FIG. 1 is a front view of essential parts showing an embodiment of the present invention, and FIG. 2 is a perspective view showing the structure of a reinforcing metal fitting. 1...Wood truss beam, 2...Top chord material, 3...Bottom chord material, 4...Tie material, 5...Nail plate,
6... mullion material, 7... first reinforcing hardware, 8... second reinforcing hardware.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. Reinforcing hardware for preventing the bottom chord of the wooden truss beam from sinking in is interposed between the wooden truss beam and the mullions that support the lower parts of both ends of the wooden truss beam. Features a wooden truss beam that prevents sinking. 2. The structure for preventing sinking of a wooden truss beam according to claim 1, wherein the reinforcing hardware includes a first reinforcing hardware and a second reinforcing hardware. 3. The first reinforcing hardware has a U-shaped cross section,
The structure for preventing sinking of a wooden truss beam according to claim 2, which is fitted from below to the lower surface of both ends of the lower chord member. 4. The structure for preventing sinking of a wooden truss beam according to claim 2, wherein the second reinforcing hardware is fitted onto a contact surface with the lower surface of the lower chord member via an adjusting member.