JP3359800B2 - Hollow member joining structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining structure of hollow members suitable for joining a plurality of hollow members.

[0002]

2. Description of the Related Art Generally, when constructing a frame structure, a temporary scaffold, etc., a hollow member is frequently used for the purpose of weight reduction or the like. An example of such a hollow member is a pipe truss member in which upper and lower chord members are formed of a tubular body and a lattice material is disposed between the chord members.

[0003] The joining of the hollow members is performed by welding or bolting, and practically, bolting is widely performed.

The joining of hollow members by bolts will be described with reference to FIGS. 5 and 6, taking the joining of pipe truss materials as an example. In FIG. 5, the upper chord member 2 and the lower chord member 3 of each pipe truss member 1 are connected to each other via a flat plate 4. That is, plate-like joining brackets 5 are integrally provided at the ends of the upper chord material 2 and the lower chord material 3 by welding, respectively, and the plate 4 is opposed to the joining bracket of the pipe truss material 1 at the joining portion. 5 are arranged on both sides, and these are joined by high tension bolts 6.

In FIG. 6, flanges 7 are integrally formed at the ends of the upper chord 2 and the lower chord 3 of each pipe truss member 1, and these flanges 7 are joined together by bolts 8. I have.

[0006]

However, the conventional joining method as described above has the following problems. In the joining structure using the plate 4 shown in FIG. 5, it takes time and effort to fasten the high tension bolt 6. Also,
Since the joining bracket 5 must be attached to the end of the pipe truss member 1 by welding, labor and cost are increased, and the weight of the pipe truss member 1 is increased. In addition, since the rigidity of the plate 4 and the joining bracket 5 needs to be ensured, the plate 4 and the joining bracket 5 become large and heavy, which hinders a reduction in the weight and size of the joining portion. Further, since the high tension bolt 6 is fastened by being inserted through the bolt insertion hole formed in the plate 4, the hole diameter is necessarily larger than the bolt diameter. Therefore, when a load is applied, displacement is caused by an amount corresponding to the difference between the bolt diameter and the hole diameter.

In the joining structure using the flange 7 shown in FIG. 6, it takes time and effort to fasten the bolt 8 in the same manner as described above, and the flange 7 must be attached to the end of the pipe truss material 1 by welding. Since it is not necessary, the cost is increased and the weight of the pipe truss member 1 is increased. In addition, flange 7
Are projected outwardly from the upper chord member 2 and the lower chord member 3, which hinders usability. In this case as well, there is a problem that it is difficult to reduce the weight and size of the joint.

The present invention has been made in view of the above circumstances, and it is possible to easily and surely join hollow members such as pipe truss members, as well as to reduce the weight and size of joints. An object of the present invention is to provide a joining structure of hollow members that can be achieved and that can reduce the amount of displacement when a load is applied.

[0009]

According to a first aspect of the present invention, there is provided a joining structure of a hollow member, wherein a plurality of hollow members are joined to each other, and the joining is performed between joining portions of one hollow member and the other hollow member. A plate is provided, and a pin hole is formed at a portion of the joint between the one and the other hollow members facing the joint plate, and a joint hole is formed at a portion corresponding to the pin hole at the joint plate. Is formed, a tubular body is inserted across the pin hole and the joining hole, and a fixing member is press-fitted toward the inside of the tubular body, and the press-fitting of the fixing member allows the joining plate and each hollow member to be inserted. The fixing member is integrally joined with the joining portion;
Is a first taper that tapers to the tip in the press-fitting direction.
It has a tapered part and the rear end is opposite to the press-fitting direction.
A second tapered portion expanding in diameter in the direction,
The end of the body, together with the rear end of the fixing member,
And a second taper of the securing member.
Characterized in that it is enlarged outward along the part
ing. In the joint structure of a hollow member according to a second aspect, in the joint structure of the hollow member according to the first aspect, a slit is formed in a length direction of the tubular body.

In the joint structure of a hollow member according to the first aspect, the joint between one hollow member and the other hollow member is such that a joint plate and a joint portion of each hollow member are integrally joined. Made by In this case, the joining between the joining plate and the joining portion of each hollow member is performed by inserting the tubular body over the pin hole of the hollow member and the joining hole of the joining plate, and press-fitting the fixing member toward the inside of the tubular body. This is achieved by expanding the diameter of the end of the tubular body and joining the joining plate and the joining portion of each hollow member. Also,
When the fixed member is press-fitted, the fixing member
Having a first tapered portion that tapers toward
Thus, the press-fitting is performed smoothly. In addition, the fixing member is
The second tapered part which expands the diameter of the part in the direction opposite to the press-fitting direction
So that the end of the tubular body is outside the joining plate
The outer diameter is expanded outward on the side to fix the joining plate
Is more reliable. In the joint structure of the hollow member according to the second aspect, since the slit is formed in the longitudinal direction of the tubular body, the diameter of the tubular body when the fixing member is pressed into the tubular body can be easily expanded. You.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the joining structure of a hollow member according to the present invention will be described with reference to the drawings.

[ First Embodiment ] FIGS. 1 and 2 show the basic structure of a joint structure for a hollow member according to the present invention.
It is the 1st reference example which shows a structure . Here, as in the case of FIGS. 5 and 6, the joining of pipe truss materials is taken as an example. That is, pipe truss members 10 and 20 having an upper chord member and a lower chord member made of steel pipes and a lattice member disposed therebetween are targeted, and these pipe truss members 10 and 20 are continuously joined. ing.

The chord members 10a, 20a corresponding to the upper chord material or the lower chord material of the pipe truss member 10 (one hollow member) and the pipe truss member 20 (other hollow member), respectively.
FIG. 2 (a)
And (b), they are joined via a joining plate 30.

As shown in FIG. 2B, two joining plates 30 are provided between the joining portions 11 and 21 on both sides of the pipe truss members 10 and 20, as shown in FIG. And the pipe truss members 10 and 20 are sandwiched. Then, as shown in FIG.
For the joint 21, at the joints 22, 22
A join has been made.

Regarding the configuration of the above-mentioned connecting portions 12 and 22,
This will be described with reference to FIG.

As shown in FIG. 1B, a chord member 10a of a pipe truss member 10 has a joint portion 11 (shown in FIG. 2).
, A pin hole 1
3 are formed. The joining plate 30 has a pin hole 1
A joining hole 31 having the same diameter as the pin hole 13 is formed in alignment with the portion corresponding to No. 3.

The tubular body 15 is inserted over the pin hole 13 and the joint hole 31. Of course, in this case, the tubular body 15 having an outer diameter smaller than that of the pin hole 13 and the joint hole 31 is used. As the length of the tubular body 15,
At the point of time when the joining is completed (the situation in FIG. 1B), the joining plates 30, 3 are adjusted to the diameter of the pipe truss material 10 so that the joining plate 30 and the end of the tubular body 15 are flush.
A length of 0 (because it is on both sides) plus a thickness is preferred.
The fixing member 16 is formed of a cylindrical body, and has a tapered portion 16a tapered toward the press-fitting direction formed at the tip end in the press-fitting direction. The fixing member 16 is press-fitted into the end 15a of the tubular body 15 so that the end 1
The diameter of 5a is enlarged so that the vicinity of the bonding hole 31 of the bonding plate 30 and the vicinity of the pin hole 13 of the bonding portion 11 are connected.

The connecting portion 22 has exactly the same structure as the connecting portion 12 and has the same corresponding components as the pin hole 23 formed at the connecting portion 21 of the chord member 20 a of the pipe truss member 20. It comprises a joining hole 32 formed in the plate 30, a tubular body 25 inserted into the pin hole 23 and the joining hole 32, and a fixing member 26 pressed into the end 25 a of the tubular body 25.

Next, a method of constructing the joint 12 will be described. First, the pin hole 13 is formed in the joint portion 11 of the pipe truss member 10 and the joint hole 31 is formed in the joint plate 30.

Then, as shown in FIG. 1A, the tubular body 15 is inserted between the pin hole 13 and the joint hole 31. Further, a fixing member 16 having a tapered portion 16a (first tapered portion) tapering in the press-fitting direction at the front end portion in the press-fitting direction is press-fitted toward the inside of the tubular body 15. Due to the press-fitting of the fixing member 16, the end 15 a of the tubular body 15 expands in diameter and acts so as to caulk the vicinity of the joint hole 31 of the joint plate 30 and the vicinity of the pin hole 13 of the joint 11, thereby achieving the connection. Is done. Therefore, the press-fitting of the fixing member 16 causes the joint 1 between the joint plate 30 and the pipe truss member 10 to be joined.
1 are integrally connected.

The method of constructing the joint portion 22 is exactly the same as the method of constructing the joint portion 12, and a description thereof will be omitted.

As described above, the connection is made at the connection points 12 and 22, so that the connection between the pipe truss member 10 and the pipe truss member 20 is eventually completed by the connection plate 30.
Is achieved through.

According to the joining structure of the hollow members, since joining can be achieved by press-fitting the fixing member 16, the pipe truss members 10 and 20 can be joined easily and reliably. At the time of joining, only the tubular bodies 15 and 25 are deformed so as to expand in diameter, and the pipe truss members 10 and 20 are not deformed. In addition, since the joining is performed by the tubular members 15 and 25 which are hollow bodies and do not cause a significant increase in weight, and the fixing members 16 and 26 which do not protrude so much outward, the joint portions 11 and 21 can be reduced in weight and size. Can be planned. Also, since there is no gap when fixing,
The amount of displacement when a load is applied can be reduced.

Further, at the time of joining, the joints 11 and 21 need only be provided with the pin holes 13 and 23, and it is not necessary to perform welding or the like, so that the cost required for joining can be reduced.

Further, at the time of press-fitting the fixing members 16 and 26, the fixing members 16 and 26 have tapered portions 16a and 26a at their distal end portions which taper in the press-fitting direction, so that press-fitting is performed smoothly. .

Second Embodiment Next, a second embodiment of the present invention will be described. This second reference
The example differs from the first reference example in that the tubular bodies 15, 2
5 and the others have the same configuration.

As shown in FIG. 3, slits 15b and 25b having a constant width are formed in the entire length of the tubular members 15 and 25 in this embodiment.

Based on the above configuration, in the present embodiment, the fixing members 15, 2 by press-fitting the fixing members 16, 26 are provided.
When the diameter of the end portions 15a and 25a of the
By providing b and 25b, the diameter can be easily expanded.

[ Embodiment ] Next, an embodiment of the present invention will be described. This embodiment is
The difference from the first and second reference examples is that the fixing member 1
6 and 26, and the others have the same configuration.

As shown in FIG. 4, the fixing members 16 and 26 of this embodiment have a tapered portion 16a, 26a formed in the front end portion and tapered in the press-fitting direction. Tapered portion 16 whose diameter increases in the direction opposite to the direction
b, 26b (second tapered portion) are formed.

With the above construction, in the present embodiment, the end portions 15a, 25
When a is expanded, the ends 15c, 2 of the tubular bodies 15, 25
5c projects outside the joining plate 30 together with the rear ends of the fixing members 16, 26, and
The diameter is increased outward along the 6 tapered portions 16b, 26b.

Therefore, in the present embodiment, the tubular body 1
The ends 15c, 25c of the fifth and 25 are expanded outward on the outside of the joining plate 30, so that the joining plate 30 can be more securely fixed.

It should be noted that the present invention is not limited to the above-described embodiment, but may be configured as follows. a) Instead of applying to the joining of pipe truss members 10, 20, it applies to joining of other hollow members such as square pipe members, members having a C-shaped open cross section. b) Instead of the pipe truss members 10 and 20 having the two chords of the upper chord and the lower chord, the present invention is applied to the joining of the pipe truss members having three or more chords. c) Instead of being applied to the joining of the round pipe-shaped chords 10a and 20a as shown in the figure, a chord made of a square pipe-shaped hollow material, a chord made of an open cross-section material such as a C shape, wood D) It is applicable to the joining of pipes and truss members 20 and 20 instead of the continuous joining of pipe truss members 20 and 20. Apply to: In this case, it can be dealt with simply by appropriately changing the shape of the joining plate to have a shape in contact with the chord material to be joined. e) Instead of making the shape of the joining plate 30 flat as shown in the figure, an arbitrary shape such as a shape having a curvature such as a U-shaped cross-section and conforming to the chord material may be used. f) Instead of forming the slits 15c, 25c over the entire length of the tubular body 15, 25, the tubular body 1
The slits are formed only in the end portions 15a and 25a of which the diameters are increased.

[0034]

According to the joining structure of the hollow member of the present invention,
The following effects are obtained. According to the joining structure of the hollow member according to the first aspect, the joining between one hollow member and the other hollow member is performed by integrally joining the joining plate and the joining portion of each hollow member. In this case, since the joining between the joining plate and the joining portion of each hollow member is achieved by press-fitting the fixing member, the hollow members can be easily and reliably joined, and the hollow member is prevented from being crushed. it can. In addition, since the joining is performed by the tubular body which is a hollow body and does not increase the weight so much and the fixing member which does not protrude so much outward, it is possible to reduce the weight and size of the joining portion. Further, since there is no gap at the time of fixing, the amount of displacement when a load is applied can be reduced. At the time of joining, it is only necessary to provide a pin hole at the joining portion of the chord material, and there is no need for welding or the like, so that the cost required for joining can be reduced. Also, the pressure of the fixing member
At the time of insertion, the fixing member
Since it has a first tapered portion that tapers,
It can be done smoothly. In addition, the fixing member is
The second tapered part which expands the diameter of the part in the direction opposite to the press-fitting direction
So that the end of the tubular body is outside the joining plate
The outer diameter is expanded outward on the side to fix the joining plate
Can be made more reliable. According to the joining structure of the hollow member according to the second aspect, since the slit is formed in the longitudinal direction of the tubular body, the diameter of the tubular body can be easily expanded when the fixing member is pressed into the tubular body. Can be.

[Brief description of the drawings]

FIG. 1 shows a basic configuration of a joint structure of a hollow member of the present invention.
It is sectional drawing which shows a part of 1st reference example in detail, (a)
Shows the state before joining and (b) shows the state after joining.

FIGS. 2A and 2B show a first reference example of a joint structure of a hollow member of the present invention, wherein FIG. 2A is a front view and FIG. 2B is a plan view.

FIG. 3 shows a basic configuration of a joint structure of a hollow member according to the present invention.
It is a perspective view which shows the tubular body used in the 2nd reference example .

FIG. 4 is a cross-sectional view showing in detail a part of the embodiment of the joining structure of the hollow members of the present invention.

FIG. 5 is a front view showing an example of a conventional joining structure of hollow members.

FIG. 6 is a front view showing another example of the conventional hollow member joining structure.

[Explanation of symbols]

 Reference Signs List 10 pipe truss material (one hollow member) 10a chord material 11 joining portion 13 pin hole 15 tubular body 15b slit 15c end portion 16 fixing member 16a taper portion (first taper portion) 16b taper portion (second taper portion) Reference Signs List 20 pipe truss material (the other hollow member) 20a chord material 21 joint 23 pin hole 25 tubular body 25b slit 25c end 26 fixing member 26a taper (first taper) 26b taper (second taper) 30 joining plate 31 joining hole 32 joining hole

Continuing on the front page (72) Inventor Shinichi Sugimori 70 Hayakawa, Takaoka City, Toyama Prefecture Inside Sankyo Aluminum Industry Co., Ltd. 72) Inventor Ritsuaki Kondo 1-10-12 Nihonbashi Horidome-cho, Chuo-ku, Tokyo Inside Chuo Built Industry Co., Ltd. (72) Inventor Keiro 1-10-12 Nihonbashi Horidome-cho, Chuo-ku, Tokyo Chuo Built Industrial Stock Inside the company (72) Inventor Tadao Nojima 1-10-12 Nihonbashi-Horidome-cho, Chuo-ku, Tokyo Inside Chuo Built Industry Co., Ltd. (72) Inventor Yoji Moroi 1-2-3 Shibaura, Minato-ku, Tokyo Shimizu Corporation (72) Inventor Yoichi Seki 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation (72) Inventor Masaaki Nakanishi 2-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation (56) References JP-A-53-130823 (JP, A) JP-A-53-139708 (JP, A) U) JitsuHiraku Akira 54-144808 (JP, U) JitsuHiraku flat 6-49811 (JP, U) JitsuHiraku flat 2-103402 (JP, U) (58 ) investigated the field (Int.Cl. ^7, DB name ) E04B 1/58 503

Claims (2)

(57) [Claims] 1. A structure for joining a plurality of hollow members, wherein a joining plate is provided between joints between one hollow member and the other hollow member, and a joint plate is provided at a joint between the one and the other hollow members. A pin hole is formed in a portion facing the joining plate,
A joining hole is formed in the joining plate at a portion corresponding to the pin hole, a tubular body is inserted between the pin hole and the joining hole, and a fixing member is pressed into the inside of the tubular body. , by press-fitting of the fixing member, wherein the joining portion of the joining plate and the hollow member is integrally coupled, tapered the fixing member toward the press-fitting direction at the tip portion
And a first tapered portion at the rear end.
Has a second tapered portion that expands in the direction opposite to the press-fit direction
And the end of the tubular body, together with the rear end of the fixing member,
Projecting outside the joining plate, and
Characterized in that the diameter thereof is increased outward along the tapered portion of the hollow member. 2. The joint structure for a hollow member according to claim 1, wherein a slit is formed in a length direction of the tubular body.