JPH02311644A - Synthetic beam for framework structure - Google Patents

Abstract

PURPOSE:To increase the strength for a concentrated load by arranging angular members between the horizontal members connecting the part between stays so as to be superposed at the upper and lower edge parts and forming a space between the upper and lower horizontal beams and carrying out fixation by bolts. CONSTITUTION:A foundation base 1 is formed from long horizontal members 1a and angular members 1b which are interposed by bolts and nuts 3 between the horizontal members 1a. A synthetic beam 4 is formed from two long horizontal members 4a each of which has a nearly square sectional shape and set between stays 2b and 2c by an installation metal fitting 7 and angular members 4b interposed at each certain interval. Further, the angular members 4b set between two horizontal members 4a are arranged so as to be superposed at the edge parts in the upper and lower stages and the length in the space between the angular members 4b in the horizontal direction is made constant. Then, after the synthetic beam 4 is fixed onto the stays 2b and 2c, diagonal bracings 5 are installed. Thus, production cost can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a composite beam that connects columns in a wooden house.

[Conventional technology]

Conventionally, beams connecting columns have been made of a single member with a rectangular cross-section and attached to the columns at both ends so that the longitudinal direction is the vertical direction.

[Problems to be Solved by the Invention] By the way, the above-mentioned conventional beam made of a single material has a large cross-sectional shape, resulting in high cost, and also tends to shrink more as it dries, causing misalignment. Moreover, since it is made of a single material, it has the problem of bending and cracking due to its own weight.

Furthermore, since it is made of a single material, it is weak against concentrated loads and may cause the column to tilt after years of use, and it is also weak against vibration, so external vibrations such as earthquakes can increase the vibration of the entire structure. there were.

The present invention aims to solve the above-mentioned problems, and its purpose is to provide a long horizontal member with a small cross-section,
It is an object of the present invention to provide a composite beam for frame structures that can solve the above-mentioned conventional problems by forming a composite beam having a truss structure using short square members having substantially the same cross-sectional shape as the horizontal members.

[Means for Solving the Problems] The present invention has been made to achieve the above-mentioned object, and its means include a square beam having a constant length between at least two horizontal beams connecting columns. are arranged so that they overlap at the ends of vertically adjacent pieces, and are arranged so that the length of the space formed by the horizontal square pieces is constant, and the square pieces are interposed between the horizontal pieces. The bolt is inserted through the bolt, and the bolt is tightened with a nut.

[For production]

The frame structural composite beam constructed as described above is constructed by placing short square beams with a certain length at regular intervals between the long horizontal beams with small cross-sections placed between the columns, and The square timbers and the lower square timbers were arranged so that they overlapped at the top and bottom ends, and were integrated by bolting through the square timbers between the horizontal timbers, so the composite beam formed by the horizontal timbers and square timbers had a truss structure. Therefore, the product cost is lower than that of a conventional beam made of a single material, and it is strong against concentrated loads, is also strong against vibration, and does not bend under its own weight.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a front view of a house assembled with a frame structure, with 1 being a base, and long horizontal members 1a, with bolts and nuts 3 interposed between the horizontal members 1a at desired intervals. It is composed of a square timber 1b. 2a is the base 1
and the mounting bracket 6, which will be described later. The connecting pillar 2 is fixed to the pillar through the mounting bracket 7, which will be described later.
b is fixed.

4 is the above-mentioned pillar 2b and 2 between the first floor and the second floor.
It is a composite beam that is fixed between 0 and 10 through mounting brackets 7, and is composed of two long horizontal members 4a each having a substantially square cross section, and square members 4b interposed at regular intervals. There is. To be more specific, square bars 4b, which are formed to a certain length between two horizontal members 4a and have approximately the same cross-sectional shape as the horizontal members 4a, are arranged in upper and lower two stages, overlapping each other at the ends, and in the horizontal direction. The square members 4b are arranged so that the length of the space between them is constant. Then, bolt insertion holes are formed in the upper and lower horizontal members 4a and the square members 4b, and the bolts and nuts 3 are used to fix them in one piece.

5 is a mounting bracket 7 fixed to the adjacent pillars 2b and 2c.
Turnbuckles are used to connect diagonally between the two.

Next, the configuration of the mounting fittings 6 and 7 will be explained.

First, the mounting bracket 6 is made of a hard metal material that is T-shaped, L-shaped, or cross-shaped in plan view, and
- A reinforcing piece 6a having a T-shape, an L-shape, or a cross-shape is fixed to the surface by means such as welding. A bolt insertion hole is formed on the distal end side of the reinforcing piece 6a.

The mounting bracket 7 is made of a hard metal material and is L-shaped in side view, and a pair of triangular reinforcing pieces 7a are fixed to the corners by means such as welding. A bolt insertion hole is formed on the distal end side of the reinforcing piece 7a, and a hole 7b for screwing the end of the brace 5 is also formed in the reinforcing piece 7a.

Next, a construction method for attaching the composite beam 4 to the column 2c using the attachment fittings 6 and 7 will be explained with reference to FIG. 2. .

First, the mounting bracket 7 is fixed to the side surface of the column 2c at a position lowered by the thickness of the composite beam 4 using bolts and nuts 8.9. Next, the composite beam 4 is placed on one piece of the mounting bracket 7, and a groove 4c for inserting the reinforcing piece 6a of the mounting bracket 6 is formed on the upper surface of the uppermost horizontal member 4a of the composite beam 4. Then, a T-shaped groove 2d is formed at the upper end of the column 2c, and the reinforcing pieces 6a are inserted into the grooves 4c and 2d. Next, insert the bolt 8 through the bolt insertion hole of the mounting bracket 6,
It penetrates holes formed in the ends of the horizontal member 4a and the square members 4b disposed at the ends, protrudes from the lower surface of the mounting bracket 7, and is tightened and fixed with nuts 9. Furthermore, the adjacent horizontal member 4a
Then, the square members 4b are connected in an L-shape, and the metal fittings 10 are nailed to prevent the horizontal members 4a and the square members 4b from shifting, and the fixing of the uppermost composite beam 4 to the pillar 2c is completed.

Next, a construction method for attaching the bottom beams 4 to the columns 2b and 2c using the mounting fittings 7 will be explained with reference to FIGS. 3 and 4.

First, attach the mounting bracket 7 to the side of the pillar 2b with bolts and nuts 8.
Fixed by 9. Next, place the end of the composite beam 4 on one piece of the mounting bracket 7, and attach the bolt/nut 8 to the column 2C so that one piece of the mounting bracket 7 contacts the uppermost horizontal member 4a.
, 9 to fix it. Then, insert the bolt 8 through the bolt insertion hole of the lower mounting bracket 7, pass through the hole of the horizontal member 4a and the square member 4b arranged at the end, protrude from the upper surface of the mounting bracket 7, and tighten and fix with the nut 9. do.

Further, the L-shaped connecting fittings 10 are nailed to the adjacent horizontal members 4a and square members 4b, so that the horizontal members 4a and the square members 4b are connected to each other with nails.
The connection of the intermediate beam 4 to the pillars 2b and 2C is completed.

In this way, after the columns 2a and 2b are fixed to the foundation 1 and the composite beam 4 is fixed to the columns 2b and 2C, the braces 5 are attached using the holes 7b of the reinforcing pieces 7a of the mounting bracket 7.

As described above, the composite beam 4 is composed of horizontal members 4a and square members 4b, and has a truss structure in which the square members 4b are arranged alternately with respect to the horizontal members 4a, and spaces are alternately formed at regular intervals between the upper and lower horizontal members 4a. Therefore, it has high strength and will not bend under horizontal and vertical loads. Note that an adhesive may be interposed between the horizontal member 4a, the square member 4b, and the square member 4b.

〔Effect of the invention〕

As described above, the present invention arranges short square timbers having a certain length at regular intervals between the long horizontal timbers placed between the pillars, and the upper square timbers and the lower square timbers have edges at the top and bottom. The upper and lower horizontal members 4a are arranged so as to overlap at the parts, and spaces are formed alternately at regular intervals between the upper and lower horizontal members 4a, and the horizontal members are integrated by bolting through square members to form a composite beam. It has a truss structure, so the material cost is lower than that of conventional single-member beams, and it is strong against concentrated loads and does not bend under its own weight. It is also resistant to vibration, and is suitable for mass production and is inexpensive. It has the advantage of being able to be manufactured in a number of ways.

[Brief explanation of the drawing]

The drawings show an embodiment of the frame structure according to the present invention, and FIG. 1 is an overall front view, FIG. 2 is a slope view of the joint between the column and the uppermost beam, and FIG. 3 is the column and the intermediate part. FIG. 4 is a plan view of the joint with the beam, and FIG. 2 a, 2 b, 2 c---Single pillar, 3-bolt/nut, 4-composite beam, 4a-horizontal material, 4b...square material.

Claims (1)

[Claims] Square timbers having a certain length are arranged between at least two horizontal timbers connecting the columns so that they overlap at the ends of vertically adjacent timbers, and the length of the space formed by the horizontal timbers is 1. A composite beam for a frame structure, characterized in that the beams are arranged so that the height thereof is constant, and that bolts are inserted between the horizontal members through the square members and are tightened with nuts to integrate them.