JPS6030331Y2 - Lattice beam with upper and lower chords made of wood - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a lattice beam in which the upper and lower chord members are made of wood.

In a general lattice beam, the upper and lower chord members and the web members are all made of steel, so fixing by nailing is usually less efficient.

Therefore, steel lattice beams are used for wooden prefabricated houses. It is considered difficult to incorporate into

Additionally, a lattice beam in which the upper and lower chord members are made of wood has been proposed, but this type of lattice beam uses a single long piece of zigzag-shaped material as the web material between the upper and lower chord members, making it difficult to assemble on-site. It is inconvenient to transport the web material to the site, and the productivity of the web material is low.

The present invention uses wood for the upper and lower chords so that it can be easily incorporated into a wooden prefabricated house, making it possible to drive nails, making it convenient to transport the web material to the site, and making it easier to transport the web material to the site. This provides a lattice beam with high productivity.

Hereinafter, embodiments of the lattice beam of the present invention shown in the drawings will be described.

1 is a wooden upper chord material, 2 is a wooden lower chord material, and 3 is a steel web material.

The wooden upper chord material 1 and the wooden lower chord material 2 each consist of two flat wooden materials 1, 1 and 2, 2, and a steel web material 3 is fitted into one of the wooden materials 1 and 2, respectively. Cross grooves 1' and 2' are provided for fixing.

The steel web material 3 has both ends parallel to each other in a flat shape, and has grooves 4.4 in opposite directions, so that one end of one steel web material 3 and the other end are parallel to each other. One end of the steel web material 3 is connected to the other end of the steel web material 3 in a cross-shaped manner via respective kerfs 4, 4.

Thus, the lattice beam of the present invention includes a predetermined number of the steel web members 3, 3. . . . are connected through grooves 4 at both ends thereof, and their connecting portions are inserted into the intersecting grooves 1' and 2' of the wooden upper chord material 1 and the wooden lower chord material 2. Using material 1 and wooden lower chord material 2, steel web materials 3, 3. Both ends (connecting parts) of ... are clamped and fixed.

Moreover, these wooden upper and lower chord materials 1 and 2, and a plurality of steel web materials 3, 3. In order to integrally fix the..., wooden face material gussets 5 are fixed from both sides of the wooden upper chord material 1 and the wooden lower chord material 2 by sandwiching their respective ends as shown in the figure. It is.

This fixing is done by nailing or adhesive, or a combination thereof.

Further, the two upper chord members 1 and the lower chord members 2 are similarly fixed.

In addition, the two wood members may have the same shape for both the upper and lower chord members 1 and 2, and cross grooves 1' and 2' may be provided in each of them, and these cross grooves 1' and 2' may be formed by steel webs. Material 3
It can be changed as appropriate depending on the shape of the connecting part.

As mentioned above, the lattice beam of the present invention has the upper and lower chord members made of wood, so it can be nailed in the same way as wood beams, and can be used as a structural material for wood-based prefabricated houses. , A short steel web material with kerfs provided at both ends is held between two upper wooden chord members and two lower wooden chord members, with the kerfs interlocking with each other in the grooves of the upper wooden chord member and the lower wooden chord member. By fixing it, a web is formed, and since the top chord material and the bottom chord material are connected by the web, extremely high rigidity can be obtained.
It can be easily configured, and since it is constructed using multiple short steel tabs that can be separated, it is convenient to transport the web material to the site during on-site assembly, and the web The productivity of the material is high, and the grooves in the upper and lower chords of wood can be formed by linear machining, which makes the process easy, and together with this, it has great practical effects.

[Brief explanation of drawings]

FIG. 1 is a side view showing an embodiment of the present invention, and FIG. 2 is a side view showing an embodiment of the present invention.
FIG. 3 is an enlarged perspective view of the steel web material according to the present invention, and FIG. 4 is an enlarged perspective view of the upper chord material according to the present invention. 1... Wooden top chord material, 2... Wooden bottom chord material, 3... Steel web material, 4... Cut groove, 5......・Gazette.

Claims (2)

[Scope of utility model registration request] (1) Two wooden upper chord materials 1 and two wooden lower chord materials 2,
It consists of a plurality of steel web members 3, 3°... arranged obliquely between the wooden upper chord member 1 and the wooden lower chord member 2, and 2
The wooden upper chord material 1 and the two wooden lower chord materials 2 each have a cross groove 1' and a cross groove 2' on one or both of them, and the steel web materials 3, 3. . . are steel web members 3, 3 . The steel web members 3, 3. A lattice beam in which grooves 4 are provided at both ends of the beam, and the grooves 4 are interlocked with each other. (2) A wooden face material gusset 5 is fixed across both ends of the wooden upper chord material 1 and the wooden lower chord material 2, sandwiching both ends thereof, as described in claim (1) of the utility model registration claim. lattice beam.