JPS6022150B2 - truss - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a truss used as a beam of a building, etc., in which two channel steels, which are cheaper and lighter than closed steel, are arranged facing each other in parallel or almost parallel. The purpose of the truss is to construct the upper and lower chord members for the truss, and to construct the truss diagonal members between the upper and lower chord members. The aim is to economically construct a highly rigid truss while keeping the overall weight of the truss light by using channel steel as the material.

As shown in FIG. 5, the conventional truss consists of two channel steels 01, 01' arranged parallel or nearly parallel to each other, with their closed parts 01a, 01a' being the channel steels 01, 01'.
'The upper and lower chord members for the truss are configured by being positioned so as to open toward the opposite direction of the comrades, and the flanges 01A, 01A', and 01A of both the upper and lower chord members 01, O1'
, 01A' was constructed by stacking truss diagonal members 02, 02, but in this case, the foundation steel 0
If a load is applied from a direction perpendicular to the direction in which the members 1 and 01' face each other, there is a disadvantage that machine buckling is likely to occur.

As a measure to improve such lateral buckling strength, it is conceivable to configure the channel steel into a closed type structure or a structure very similar to this, but in order to create such a closed structure, it is necessary to Reinforcing plates spanning between the lips on both sides of the entrance must be welded at multiple locations at appropriate intervals, which requires a great deal of processing time, which not only tends to increase costs, but also There is an inconvenience in that the intended purpose of using a 200 mm carbon fiber, which is weight reduction, is lost.

In view of the above-mentioned circumstances, the present invention achieves high bending strength and buckling strength by rationally arranging the channel steel and the truss diagonal members without sacrificing the weight reduction achieved by using the channel steel. This system enables economical horizontal construction of a highly rigid truss in which two channel steels are arranged parallel or nearly parallel to each other, and their closing portions are in the opposite direction of the channel steels. The upper and lower chord members for the truss are configured so as to open in a direction perpendicular to It is characterized in that the truss diagonal members are installed so that they also serve as connecting members.

In other words, two channel steels placed parallel or almost parallel to each other are placed in a laterally open state with a large moment of inertia to form upper and lower chord members for a truss, and the gap between the upper and lower chord members is By using a truss diagonal member attached to the beam, the number of members used can be reduced by combining the use of a connecting member spanning between both lips of at least one of the groove-shaped steel entrance sections to form a closed structure. , without sacrificing the original purpose of using twill steel, which is weight reduction, the bending strength increases due to the increase in the moment of inertia, and the buckling strength is close to that of the closed cross-sectional structure. With increasing
Overall, it has become possible to economically construct a truss with very high rigidity. Embodiments of the present invention will be described in detail below based on the drawings.

Figures 1 and 2 show an example of the truss of the present invention, which is installed between the upper ends of steel columns 3 and 3, which are spaced apart at appropriate intervals; Two C-type steels (channel steel) arranged parallel or almost parallel to each other and facing each other.
1 and 1', and their entrance parts la and la' are C-shaped steel 1,
The upper and lower chord members for the truss are constructed by arranging the upper and lower chord members for the truss in a horizontal direction perpendicular to the facing direction of the comrades 1 and 1' so as to open in the same direction. On the sides la and la', a truss diagonal member 2, which is bent into a continuous V shape in the longitudinal direction of the C-shaped steels 1 and 1', is installed.
Both lips la, . la,
and la', , 1 are dyed to serve as a connecting member between them.

FIG. 3 shows another embodiment, in which two C-shaped steels 1, 1' are arranged facing each other in parallel or almost parallel with an appropriate interval in the vertical direction, and their entrance portions la, la'
The C-shaped steels 1 and 1 are oriented so as to open in opposite directions in a lateral direction perpendicular to the opposing direction of the C-shaped steels 1 and 1 to form upper and lower chord members for the truss, and both upper and lower chord members 1 , 1', a truss diagonal member 2, which is bent into a V-shape continuous in the longitudinal direction of the C-shaped steel 1, 1', is placed between the lower chord member 1' and the opening part 1 of the truss diagonal member 2, which is connected to both lips la', , 1'. 1 is mounted in a state that also serves as a connecting member between them, and at a plurality of locations appropriately spaced in the longitudinal direction of the closing part la of the upper chord member 1, there are ribs on both sides of the upper chord member 1, spanning between the lips la, , la, It is constructed by welding reinforcing connecting members 4. In FIG. 4, a U-shaped steel is used in place of the C-shaped steel that constitutes the upper chord member 1 in FIG. 3.

In addition, the truss of the present invention can be made to be equivalent to the conventional truss shown in FIG. Can be constructed into a strong structure. Furthermore, when truss diagonals 2, 2 are dyed between both sides of the upper and lower chord members 1, 1', respectively,
It is possible to construct a strong structure with even greater rigidity. Further, the channel steels 1 and 1' described in the claims include C-shaped steel, U-shaped steel, and the like.

Further, the shape, size, etc. of the truss diagonal member 2 may be freely designed depending on the conditions of use.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the truss according to the invention, and the first
The figure is an overall front view, Figure 2 is an enlarged sectional view along the Rollo line in Figure 1, Figures 3 and 4 are longitudinal sectional side views of main parts showing other embodiments, and Figure 5 shows a conventional truss. FIG. 1, 1'... Channel steel, 2... Truss diagonal member. Figure 4 Figure 5 Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1. Two channel steels 1, 1' arranged parallel or nearly parallel to each other are arranged so that their openings 1a, 1a' face in a direction perpendicular to the direction in which the channel steels 1, 1' face each other. The upper and lower chord members for the truss are configured in an open position, and the upper and lower chord members 1 and 1' are also used as a connecting member spanning between the lips on both sides of at least one of the groove-shaped steel openings. A truss characterized in that a truss diagonal member 2 is attached to the truss diagonal member 2.