JPH0782834A - Lattice beam - Google Patents

Abstract

PURPOSE:To diversify opening design by forming a lattice beam of an upper chord member, lower chord member and a plurality of lattices for interconnecting the upper and lower end parts of an end plate. CONSTITUTION:A lattice beam 1 is formed of a pair of vertical end plates 2, an upper chord member 3 interconnecting the upper end parts of the end plate 2 and a pair of lower chord members 4 and a plurality of lattices 5 extending obliquely upward from the lower end parts of the end plates 2. Rectangular plates 13 are welded to the intermediate parts of the upper and lower chord members 3, 4 to make an open ceiling 30 of a rectangular space surrounded by lattice beams 1, 25, 26. Further, an opening 32 for a gateway having the upper end located above the lower end of the end plate 2 is formed in the wall panel 11 disposed below the lattice beam 1. Thus, the limit of the height of opening design can be mitigated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lattice beam which can relax the height restriction of an opening forming an entrance and exit and increase the degree of freedom in its design.

[0002]

2. Description of the Related Art For example, as schematically shown in FIG. 3, a lattice beam b having a horizontal upper chord member b1 and a lower chord member b2 is bridged between columns a and a provided side by side, and the lattice wall b is used to form an outer wall. A so-called prefabricated house that supports the upper end of the forming wall panel p has become widespread.

In addition, the wall panel p is often provided with an opening c which forms, for example, a doorway.

[0004]

However, in the conventional one in which the wall panel p is supported by the lattice beam b to form the outer wall, the outer wall is provided with an upper end as shown by a chain double-dashed line in FIG. 3, for example. It is not possible to provide a large opening d located higher than the lower surface of the lattice beam b because the lattice beam b becomes an obstacle, and as a result, the design including the height of the opening is limited by the lattice beam b. However, there is a problem in that the degree of freedom in design is reduced.

The present invention is based on having a pair of lower chord members which extend obliquely upward from the lower end portions of the respective end plates and are connected to the lower surface of the upper chord members at the middle position of the length of the upper chord members. It is an object of the present invention to provide a lattice beam in which an opening whose upper end is located at a higher position than the lower end of the end plate can be formed below, and which can increase the degree of freedom in designing the opening.

[0006]

In order to achieve the above object, the lattice beam of the present invention comprises a pair of vertical end plates and a horizontal and long upper chord member connecting between the upper ends of the end plates. Consists of a pair of lower chord members that extend diagonally upward from the lower end of each end plate and are connected to the lower surface of the upper chord member at an intermediate position of the length of the upper chord member, and a plurality of lattices that diagonally join the upper chord member and the lower chord member. .

[0007]

As described above, the lattice beam is connected to the horizontal upper chord member connecting the upper end portions of the end plates and the upper chord member lower surface at an intermediate position of the upper chord member extending obliquely upward from the lower end portions of the respective end plates. Done 1
With a pair of lower chords. Therefore, in the wall body arranged below the lattice beam, the opening whose central portion is located above the lower end of the end plate can be formed without being obstructed by the lower chord member. Can be relaxed and the degree of freedom in designing the opening can be increased.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In the drawings, a lattice beam 1 of the present invention includes a pair of vertical end plates 2 and 2, a horizontal and long upper chord member 3 connecting upper end portions of the end plates 2 and 2, and lower ends of the end plates 2. A pair of lower chord members 4 and 4 connected to the lower surface of the upper chord member 3 at an intermediate position of the length of the upper chord member 3 and the upper chord member 3 and the lower chord members 4 and 4
It is composed of a plurality of lattices 5 which are connected diagonally.

The lattice beam 1 is bridged between two pillars 10 and 10 made of square steel pipes erected on the outer peripheral street of the house, and the lower end of the wall panel 11 forms the outer wall of the first floor. To support.

The end plates 2 and 2 are vertical rectangular steel plates bolted to the faces of the pillars 10 and 10 facing each other and at the same height position, and the upper end of each of the end plates 2 and 2 has a groove portion facing downward. The edge of the horizontal upper chord member 3 made of the standard channel steel is welded.

Further, at each lower end of the end plates 2 and 2, a narrow portion 12 provided at one end is made of grooved steel which is fitted and welded in the groove of the upper chord member 3 and in the vicinity of an intermediate position of its length. The other end of the lower chord member 4 is welded. The lower chord members 4 and 4 are arranged with their groove portions facing upward, and the lower chord members 4 and 4 and the upper chord member 3 are rectangular plates 1 welded to the flanges of each channel steel.
3 enhances the connection strength.

As described above, the pair of lower chord members 4, 4 extends obliquely upward from the lower end of each end plate 2 and is firmly connected to the lower surface of the upper chord member 3 in the vicinity of the middle position of the length of the upper chord member 3. . Therefore, the lower surfaces of the lower chord members 4 and 4 at the connection portion with the upper chord member 3 are located above the lower ends of the end plates 2 and 2.

A projecting piece 14 extending in the lengthwise direction of the upper chord member 3 is projectingly provided on the end plate 2, and a narrow portion 15A provided at a lower end portion is fitted in a groove portion of the lower chord member 4 and The narrow portion 15B at the upper end of the lattice 5A at the end made of grooved steel extending obliquely upward is fitted in the groove portion of the upper chord member 3 and the notched groove 16 provided in the web 5a is fitted on the upper portion of the projecting piece 14. I'm wearing it.

Therefore, the moment due to the load applied to the column 10 from above can be transmitted to the lattice 5A at the end through the end plate 2 and the projecting piece 14, and the bending and damage of the upper chord member 3 due to the moment can be prevented. Therefore, the strength of the end portion of the lattice beam 1 can be increased.

The upper chord member 3 and the pair of lower chord members 4 and 4 are
In addition to the ends of the lattices 5A and 5A, a plurality of, in this example, four, diagonal grooved lattices 5 made of channel steel are joined together, and the upper chord member 3 and the lower chord member 4 are narrow portions provided at the top and bottom. 19
A and 19B are also connected by a bundle member 17 made of vertical grooved steel fitted in the groove portions of the upper chord member 3 and the lower chord member 4.

On each surface parallel to the facing surfaces of the columns 10 and 10, a horizontal upper chord member 20 having the same height as the upper chord member 3, and a horizontal lower chord member 21 having the lower end and the lower surface of the end plate 2 aligned with each other. The lattice beams 23, 23 are arranged in line with the lattice beam 1 by bolting the end plates 24 of the lattice beams 23, 23 having the above.

Further, the ends of the lattice beams 25, 25 having the same structure as the lattice beam 23 and extending indoors are fixed to the columns 10, 10, and between the parallel lattice beams 25, 25,
A lattice beam 26 having the same configuration as the lattice beam 23 is bridged horizontally.

The lattice beams 23, 25, 26 support side portions of the floor panel 29 forming the floor A of the second floor, and are rectangular spaces surrounded by the lattice beams 1, 25, 25, 26. Then, as shown in FIG. 2, a blow-through 30 is formed.

As shown in FIGS. 1 and 2, the wall panel 11 arranged below the lattice beam 1 has an opening for an entrance whose upper end is located above the end plates 2 and the lower end. Three
2 is provided, the upper portion of the opening 32 is shielded by, for example, stained glass 33, and the lower portion is provided with the door 3.
4 will be placed.

Thus, the lower chord members 4 and 4 of the lattice beam 1 are
Since it extends obliquely upward from the lower end portions of the end plates 2 and 2, it is possible to provide the large-sized opening portion 32 capable of imparting a new appearance, and to diversify the opening design and improve the appearance, Since the height of the opening 32 is made larger than the lower end of the end plate 2, the lighting performance can be improved.

The outer wall below the lattice beam 1 is the wall panel 1.
Instead of using No. 1, it may be formed from a stud, an exterior material, or the like.
Further, the lattice beam 1 of the present invention is preferably used for forming the outer wall of the blow-through 30 which does not need to support the floor as in the present embodiment.

[0022]

As described above, the lattice beam of the present invention comprises a pair of lower chord members which extend obliquely upward from the lower end of each end plate and are connected to the lower surface of the upper chord member. Down,
It is possible to provide an opening whose upper end exceeds the lower end of the end plate upwards, which can ease the height restriction of the opening design,
The degree of freedom in designing the opening can be increased, and it is also useful for improving the lighting performance.

Since the pair of lower chord members is connected to the upper chord member at the middle position of the length of the upper chord member, the strength of the entire lattice beam can be maintained in good balance.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view schematically showing a house in which the lattice beam of the present invention can be adopted.

FIG. 3 is a front view illustrating a conventional technique.

[Explanation of symbols]

 2 End plate 3 Upper chord material 4 Lower chord material 5, 5A lattice

Claims (1)

[Claims] 1. A pair of vertical end plates, a horizontal and long upper chord member connecting between upper end portions of the end plates, and an upper chord member extending obliquely upward from the lower end portion of each end plate. A lattice beam composed of a pair of lower chord members connected to the lower surface of the upper chord member at a position and a plurality of lattices diagonally joining the upper chord member and the lower chord member.