JPH0868119A - Joint structure of pipe truss materials - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a joint structure for pipe truss materials, which enables easy and reliable joining of pipe truss materials. [Structure] A structure in which the upper chord members 2 and 2 and the lower chord members 3 and 3 of both pipe truss members 1 and 1 to be joined are pin-joined to each other via joining plates 17 and 17 having a substantially U-shaped cross section And

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe truss material joining structure suitable for joining a pipe truss material in which upper and lower chord members are tubular bodies.

[0002]

2. Description of the Related Art Generally, when constructing a frame structure, a temporary scaffold, etc., a pipe truss material in which upper and lower chord members are made of pipes and lattice members are arranged between the chord members is often used. ing.

Conventionally, the joint structure of such a pipe truss material is as follows. First, when the pipe truss members are continuously joined in one direction, as shown in FIG. 5, the upper chord members 2, 2 and the lower chord members 3, 1 of the pipe truss members 1, 1 are joined.
The three are joined together by a flat plate 4. That is, plate-like joining brackets 5 are integrally provided by welding at the ends of the upper chord members 2 and the lower chord members 3, respectively. And plate 4,
4 are arranged on both sides of the joining brackets 5 and 5 facing each other at the joining portion of the pipe truss members 1 and 1, and these are joined by high tension bolts 6 and 6.

In addition to this, as shown in FIG. 6, flanges 7 are integrally formed at the ends of the upper chord members 2 and the lower chord members 3 of the pipe truss members 1 and 1, respectively.
A structure in which bolts 8 and 8 are joined together is also used.

Further, when a plurality of pipe truss materials are crossed and joined, or when another member is joined to the pipe truss material, the following joining structure is used.
As shown in FIG. 7, for example, the lower chord member 3 of the pipe truss member 1
A commercially available clamp metal fitting 9 is attached to this, and by this clamp metal fitting 9, another pipe truss material or another member, for example, a single pipe 10 is joined.

Further, as shown in FIG. 8, a so-called U-bolt 1 having a U-shape and having male screw portions formed at both ends thereof.
A bracket 13 is joined to the pipe truss material 1 by means of a nut 1 and a nut 12, and another member (not shown) is attached to the bracket 13.

[0007]

However, each of the conventional joint structures for pipe truss members as described above has the following problems. First, in the joining structure using the plate 4 shown in FIG. 5, the work of fastening the high-tensile bolt 6 is troublesome. Further, since the joining bracket 5 must be attached to the end portion of the pipe truss material 1 by welding, labor and cost are required, and the weight of the pipe truss material 1 is increased. In addition to this, in order to secure rigidity in the direction in which the plate 4 and the joining bracket 5 are bent, it is necessary to make the plate 4 and the joining bracket 5 thick. However, if the plate 4 and the joining bracket 5 are thickened in this way, the joining portion is excessively over the yield strength of the pipe truss material 1 itself against the vertical bending and shearing force, that is, unnecessary waste yield strength. Will have. Further, in order to weld the joining bracket 5 to the pipe truss material 1, the vertical dimension of the joining bracket 5 must be made larger than the diameter of the upper chord member 2 and the lower chord member 3. For these reasons, downsizing of the joint is hindered.

In the joint structure using the flange 7 shown in FIG. 6, similarly to the above, the work for fastening the bolt 8 is troublesome, and the flange 7 must be attached to the end of the pipe truss material 1 by welding. However, the cost is increased and the weight of the pipe truss material 1 is also increased. Further, since the flange 7 is projected more outward than the upper chord member 2 and the lower chord member 3, there is a problem in that it becomes an obstacle and the usability is poor.

In the joining structure using the clamp fittings 9 shown in FIG. 7, since the joining strength of each clamp fitting 9 is low, a large number of clamp fittings 9 must be used to obtain the required joining strength. However, it takes time to join. Further, when the pipe truss material 1 and other members are crossed, the clamp metal fittings 9 have to be arranged so as to be displaced from the crossing portion, so that an eccentric bending moment is generated and a large load cannot be transmitted. . Also in this case, the clamp metal fitting 9 is used for the upper chord member 2 and the lower chord member 3 as well.
Since it protrudes to the outside, the usability becomes poor.

In the joining structure using the U bolts 11 shown in FIG. 8, it takes time and effort to fasten the bolts. In addition, since a bending moment is applied to the bracket 13, there is a problem that the bracket 13 becomes large in order to secure a necessary bonding strength when the bracket 13 is bonded with only one bracket 13. Further, the U-bolt 11 has a problem that the fixing force is small with respect to the force of the joined members attempting to rotate around the axes of the upper chord member 2 and the lower chord member 3.

The present invention has been made in view of the above points, and an object of the present invention is to provide a joint structure for pipe truss members, which enables the pipe truss members to be joined easily and reliably.

[0012]

The invention according to claim 1 is
A structure in which a plurality of pipe truss members, at least upper and lower chord members of which are tubular bodies, are joined so that the chord members are continuous, and a joining plate that is substantially U-shaped in cross section and has a certain length is joined. Should be disposed so as to cover both ends of the chord member of the one pipe truss material and the other end portion of the chord member of the other pipe truss material, and the joining plate and the pipe truss members of both of them. It is characterized in that each of the chord materials of (3) and (4) are joined to each other by pins.

According to a second aspect of the present invention, at least the upper and lower chord members have a structure in which other members are crossed and joined to the pipe truss member made of a tubular body, and the chord member of the pipe truss member is viewed in cross section. It is characterized in that a joint plate having a substantially U shape and having a constant length is pin-joined, and a fixing metal piece integrated with the joint plate is pin-joined to the other member.

The invention according to claim 3 is the joint structure for pipe truss materials according to claim 2, characterized in that the fixing member is a joint plate having a substantially U shape in cross section and having a constant length. There is.

[0015]

According to the first aspect of the invention, the ends of the chord members of the two pipe truss members to be joined are pin-joined to each other via a joining plate having a U-shaped cross section and a constant length. And As a result, the string material of the pipe truss material,
There is no need to provide any brackets or flanges. In addition, since the joint plate has a substantially U-shaped cross section, a sufficient proof stress can be obtained not only in the vertical direction but also in the lateral direction at the joint portion. Furthermore, the outward protrusion of the joining plate can be minimized. Moreover, since the pins are joined, the work can be performed easily.

In order to join the other member to the pipe truss member, the chord member of the pipe truss member is pin-joined to the chord member of the pipe truss member to join the other member to the other member. , The fixing plate integrated with the joining plate is joined by pins. As a result, the pipe truss material and the other member are pin-joined with each other through the integrated joining plate and fixing metal fitting. At this time, the pipe truss material and the other member can be crossed and joined by forming the joining plate and the fixing bracket so as to form a predetermined angle. Further, between the joint plate and the chord member of the pipe truss material, the load is transmitted by the surface contact between the joint plate and the pipe truss material. Furthermore, since the joining of the joining plate and the fixing member to both members is done by pin joining, the joining work can be easily performed.

According to the third aspect of the invention, the fixing member is composed of a joint plate having a substantially U shape in cross section and having a constant length. As a result, the load is transmitted even between the other member and the fixing member by the surface contact between the other member and the fixing member.

[0018]

The present invention will be described below with reference to the first and second embodiments shown in the drawings.

[First Embodiment] Here, an embodiment in which a plurality of pipe truss members are continuously joined in one direction will be described. FIG. 1 shows a joint structure of a pipe truss material according to the present invention. As shown in FIGS. 1 (a) and 1 (b), each pipe truss member 1 to be joined is made of a steel pipe, and is arranged in parallel with each other, an upper chord member (chord member) 2, a lower chord member (chord member). ) 3, and the lattice material 15 arranged between them.

Upper chord member 2 and lower chord member 3 of each pipe truss member 1
At the end portions of the pin holes 1 which penetrate in the direction orthogonal to the surface on which the upper chord member 2, the lower chord member 3, and the lattice member 15 are located, respectively.
6, 16 are formed.

As shown in FIG. 1A, the pipe truss members 1, 1 to be joined to each other are the upper chord members 2, 2.
2. The lower chord members 3 and 3 are arranged so as to be continuous. Then, the joining plates 17 are arranged on the upper chord members 2 and 2 and the lower chord members 3 and 3 facing each other at the joining portion so as to straddle both of them.

As shown in FIGS. 1 (b) and 1 (c), each joint plate 17 is formed by bending a steel plate, and is substantially U in cross section taken along the contours of the upper chord member 2 and the lower chord member 3. It has a character shape and a certain length. At this time, the thickness of the joining plate 17 is set to be substantially equal to the thickness of the upper chord member 2 and the lower chord member 3. In such a joining plate 17, pin holes 18 and 18 are formed at positions corresponding to the pin holes 16 and 16 of the upper chord members 2 and 2 and the lower chord members 3 and 3 to be joined, respectively.

As shown in FIGS. 1 (a) and 1 (b), the joining plate 17 is, as described above, the upper chord members 2 and 2 above and below the pipe truss members 1 and 1 to be joined. The upper chord member 2 and the lower chord member 3 are housed inside the joining plate 17 so as to straddle the lower chord members 3 and 3. The pin holes 16 formed in the upper chord member 2 and the lower chord member 3 and the pin holes 18 formed in the joint plate 17 are aligned with each other, and the pins 19 are inserted into the pin holes 16, whereby both pipe trusses are inserted. The materials 1 and 1 are pin-bonded to each other via the bonding plates 17 and 17.

In the joint structure of the pipe truss members 1 described above, both pipe truss members 1, 1 to be joined are pin-joined via the joining plate 17 having a substantially U-shaped cross section. There is. As a result, the pipe truss material 1
Since it is not necessary to provide any brackets or flanges at the ends of the upper chord member 2 and the lower chord member 3, the labor and cost can be suppressed, and the weight of the pipe truss member 1 can be reduced. Further, since the joint plate 17 has a substantially U-shaped cross section, sufficient strength can be obtained not only in the vertical direction but also in the lateral direction at the joint portion, and the pipe truss material 1 and the joint plate 17 are separated from each other. , Its proof strength will be well balanced and lean. In addition to this, since the load is transmitted by the surface contact between the inner peripheral surface of the joint plate 17 and the outer peripheral surface of the pipe truss material 1, the joint plate 17 is enlarged even when a large load is transmitted. It is not necessary and can be made compact. Furthermore, since the upper chord member 2 and the lower chord member 3 of the pipe truss material 1 are housed inside the joint plate 17, it is possible to minimize the outward projection, and improve the usability. It is possible to make the joint portion compact.
Furthermore, since the pipe truss members 1 and 1 and the joint plate 17 are configured to be pin-joined by the pins 19, the joining work does not require the trouble of bolt tightening, and the workability can be significantly improved.

[Second Embodiment] Next, an embodiment in which pipe truss members are crossed and joined together will be described. Figure 2
FIG. 4 shows a joint structure of pipe truss materials according to the present invention. As shown in FIG. 2, the pipe truss material 1 is crossed with small truss materials (other pipe truss materials) 21 and 22 whose vertical dimension is smaller than the pipe truss material 1 at a predetermined angle, for example, 90 degrees. And then joined.

As shown in FIG. 3, the pipe truss material 1 and the small truss material 21 are joined to each other through a joint fitting 23.

The joining metal fitting 23 is formed along the outer shape of the lower chord member 21a of the small truss material 21 to be joined with the flat plate-like fixing plates (fixing metal fittings) 24, 24 facing each other with the lower chord material 3 of the pipe truss material 1 interposed therebetween. U-shaped joint plate 2
5 and 5 are welded and integrated.

The fixed plates 24, 24 and the lower chord member 3 of the pipe truss material 1 are pin-joined by the pins 26, 26. On the other hand, the joint plate 25 and the lower chord member 21a of the small truss member 21 are pin-joined by the pins 27, 27. At this time, the load is transmitted between the joint plate 25 and the lower chord member 21a by the surface contact between the inner peripheral surface of the joint plate 25 and the outer peripheral surface of the lower chord member 21a, while the fixed plates 24 and 24 and the lower chord member 21a are transmitted. 3, the load is to be supported and transmitted by the pins 26, 26. Therefore, it is necessary to set the strength of the pins 26, 26, that is, the diameter, the material, etc., in correspondence with the load. In this manner, the pipe truss material 1 and the small truss material 21 are pin-bonded to each other with the joining metal fitting 23 interposed therebetween while intersecting at a predetermined angle.

On the other hand, as shown in FIG. 4, the pipe truss material 1 and the small truss material 22 are joined to each other through a joining fitting 30. The joint fitting 30 is a joint plate 31 having a substantially U-shaped cross section along the outer shape of the lower chord member 3 of the pipe truss material 1.
And a joining plate (fixing metal fitting) 32 having a substantially U-shaped cross section along the outer shape of the upper chord member 22a of the small truss member 22 are integrally formed by welding in a state intersecting at a predetermined angle. There is. The lower chord member 3 of the pipe truss material 1 and the joint plate 31 are pin-joined by the pins 33, 33. Similarly, the upper chord member 22a of the small truss member 22 and the joint plate 32 are pin-joined by the pins 34, 34 (only one is shown). In this way, the pipe truss material 1 and the small truss material 22 are connected via the joint fitting 30.
The pins are joined to each other in a state in which they intersect at a predetermined angle.

The above-mentioned pipe truss material 1 and small truss material 2
As for the joint structure with 1 and 22, these are joint fittings 2 respectively.
It is configured to be pin-joined via 3, 30. As a result, the pipe truss material 1 and the small truss materials 21, 22 can be joined with high strength in a state where they intersect at a predetermined angle. At this time, since the pipe truss material 1 and the small truss materials 21, 22 can be joined at the intersecting portion without eccentricity, a large load can be transmitted. In addition, by joining the pipe truss material 1 and the small truss materials 21 and 22 with the joining metal fittings 23 and 30, the respective members can be fixed also in the direction of rotation around their axes. Further, also in the joining work, the trouble of tightening the bolts becomes unnecessary, and the workability can be remarkably improved. Furthermore, since the joint plates 25, 31, 32 are substantially U-shaped in cross section, the outward protrusion can be minimized, the usability is improved, and the joint portion is made compact. Even when, for example, a sheet for curing is stretched on the pipe truss material 1 and the small truss materials 21 and 22, the unevenness can be kept to a minimum. Moreover, since the load is transmitted by the surface contact between the inner peripheral surfaces of the joint plates 25, 31, 32 and the outer peripheral surfaces of the pipe truss member 1 and the small truss members 21, 22, the joint is performed even when a large load is transmitted. It is not necessary to upsize the plates 25, 31, 32, and the joint fittings 23, 30 can be made compact. In addition to this, since the joining plate 23 is configured such that the fixing plates 24 and 24 integrated with the joining plate 25 face each other with the lower chord member 3 of the pipe truss material 1 interposed therebetween, the lower chord member of the pipe truss material 1 is formed. Even in the portion where 3 and the lattice material 15 gather, it is possible to join the pipe truss material 1 and the small truss material 21 while avoiding interference with the lattice material 15.

In the second embodiment, the members to be joined to the pipe truss member 1 are not limited to the small truss members 21 and 22, but may be other members such as a single pipe. Further, the pipe truss material 1 and the small truss materials 21 and 22 can be arbitrarily set to other than 90 degrees by changing the intersecting angle of the fixed plate 24 and the joining plate 25 of the joining fitting 23 and the joining plates 31 and 32 of the joining fitting 30. It goes without saying that they can be joined at the intersection angle of.

[0032]

As described above, according to the joint structure for pipe truss members according to the first aspect, the ends of the chord members of both pipe truss members to be joined are formed in a substantially U shape in cross section. The pins are joined through the joining plate. As a result, it is not necessary to provide any bracket or flange on the chord material of the pipe truss material, so that the cost can be suppressed and the weight of the pipe truss material can be reduced. In addition, since the joining plate has a substantially U-shaped cross section,
A sufficient yield strength can be obtained not only in the vertical direction but also in the lateral direction at the joining portion, and the pipe truss material and the joining plate are well-balanced and have no waste. In addition to this, since the load is transmitted by the surface contact between the inner peripheral surface of the joint plate and the outer peripheral surface of the pipe truss material, it is not necessary to upsize the joint plate even when transmitting a large load, The joint portion can be made compact. Moreover, it is possible to minimize the outward protrusion of the joint plate, improve the convenience of use, and also from this point, it is possible to make the joint portion compact. Furthermore, since the pins are joined together, the joining work does not require the trouble of tightening bolts, and the workability can be significantly improved.

According to the joint structure of the pipe truss material according to the second aspect, the pipe truss material and the other member are pin-joined via the joint plate and the fixing metal fitting which are integrated. With this, by forming the joint plate and the fixing bracket so as to form a predetermined angle, both members can be joined with high strength without crossing and eccentricity, and a large load can be transmitted. Become.
Moreover, since the joining of the joining plate and the fixing member to both members is made by pin joining, it is possible to fix each member also in the direction of rotation around its axis. Further, also in the joining work, the trouble of tightening the bolts becomes unnecessary, and the workability can be remarkably improved. Further, the joining plate has a substantially U-shaped cross-section. This makes it possible to minimize outward protrusion, improve usability, and make the joint compact. For example, a pipe truss material is stretched with a curing sheet or the like. Even in the case, it can be accommodated by minimizing the unevenness. Moreover, since the load is transmitted by the surface contact between the joint plate and the pipe truss material, it is not necessary to upsize the joint plate even when transmitting a large load, and the joint portion can be made compact. .

According to the joint structure of the pipe truss material according to the third aspect, the fixing metal member is constituted by the joint plate having a substantially U-shaped cross section. As a result, the load is also transmitted between the other member and the fixing fitting by the surface contact between the other member and the fixing fitting, so that the fixing fitting is enlarged even when a large load is transmitted. No need to
Further miniaturization of the joint can be achieved.

[Brief description of drawings]

1A and 1B are views showing an example of a joint structure of a pipe truss material according to the present invention, in which FIG. 1A is an elevation view showing a joint portion; FIG.
FIG. 3 is a side sectional view of the same, and FIG. 3C is a perspective view showing a joining plate used for joining.

FIG. 2 is an elevation view showing another example of the joint structure of the pipe truss material according to the present invention.

FIG. 3 is a perspective view showing a main part of the joining structure shown in FIG.

FIG. 4 is a perspective view showing another main part of the joining structure shown in FIG.

5 (a) is an elevation view and FIG. 5 (b) is a plan view showing an example of a conventional joint structure of pipe truss materials.

FIG. 6 is an elevational view showing another example of a conventional joint structure for pipe truss members.

FIG. 7 is an elevational view showing still another example of the conventional joint structure of pipe truss members.

8 (a) is an elevation view and FIG. 8 (b) is a side sectional view showing still another example of the conventional joint structure of pipe truss materials.

[Explanation of symbols]

 1 Pipe truss material 2 Upper chord material (chord material) 3 Lower chord material (chord material) 17,25,31 Joining plate 21,22 Small truss material (other pipe truss material) 24 Fixing plate (fixing metal fitting) 32 Joining plate (fixing) Metal fittings)

 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Hiroshi Tokuda 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Masaaki Nakanishi 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Construction Within the corporation

Claims (3)

[Claims] 1. A structure in which a plurality of pipe truss members, at least upper and lower chord members of which are tubular bodies, are joined to each other so that the chord members are continuous, and has a substantially U shape in cross section and has a constant length. A joining plate is arranged so as to cover both ends of the chord member of the one pipe truss material to be joined and end portions of the chord member of the other pipe truss member, and the joining plate and the A joint structure for pipe truss members, characterized in that each chord member of both pipe truss members is pin-bonded to each other. 2. A structure in which at least upper and lower chord members are joined to a pipe truss member made of a pipe by crossing other members, and the chord member of the pipe truss member has a substantially U-shaped cross section. A joint structure for a pipe truss material, wherein a joint plate having a fixed length is pin-joined, and a fixing metal piece integrated with the joint plate is pin-joined to another member. 3. The pipe truss material joining structure according to claim 2, wherein the fixing metal member is a joining plate having a substantially U shape in cross section and having a constant length. Construction.