JP3511419B2 - Steel frame - Google Patents

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to a factory, office, meeting place, on the steel frames using the other of Steel Building Ru been applied to the roof truss or the like in the steel pipe.

[0002]

2. Description of the Related Art Conventionally, when joining a steel pipe used for a steel frame structure such as a truss, a structure as shown in FIGS. The joining structure shown in FIG. 10 has a structure in which a steel pipe 50 is attached to the ends of a pair of steel pipes 50, 50 to be joined in a factory.
The joining flanges 51 are welded to each other perpendicularly to the longitudinal direction, and at the site, the flanges 51, 51 are butted to each other and joined by a high-strength bolt 52 or the like. In the joining structure shown in FIG. 11, a joining plate 53 extending in the radial direction and projecting to the outside of the pipe wall is welded to the ends of the pair of steel pipes 50, 50 to be joined in a factory, and both steel pipes 50 are on-site. The joining plate 53 is sandwiched by a pair of upper and lower connecting plates 54, 54 that straddle the joining plate 53, and the joining plate 53 and the connecting plate 54 are joined by a high-strength bolt 52 or the like. The joining structure shown in FIG. 12 has a pair of steel pipes 50, 50 to be joined in a factory.
Of the steel pipe 50 is notched in a notch shape, and a joint plate 55 along the notch is welded to the notch 50a of one steel pipe 50, and the joint plate 55 is notched in the other steel pipe 50 on site. It is joined to 50a by welding.

[0003]

However, FIG. 10 and FIG.
In the joint structure such as 1, the flange 5 is provided on the outside of the steel pipe 50.
1 and the joining plate 53 are protruded, there is a problem that they are an obstacle in various kinds of work, and in the work of bolt tightening, a large number of bolts are tightened to a specified value by a special tightening device for exclusive use, It is necessary to check the proof stress with a special tool, which makes the work complicated. In addition, in the joint structure as shown in FIG. 12, tedious welding work on site is required,
There is a problem that the quality is not stable due to the weather, safety scaffolding, skill of welder, etc.

An object of the present invention is to provide a joining structure for steel pipes for a steel frame structure, which has a small number of protruding portions, is suitable for safe work, and can be joined with stable joining quality and work efficiency without requiring special dedicated equipment or skilled workers . It is to provide a steel frame.

[0005]

Means for Solving the Problems The steel frame structure of the present invention is
The string material of the truss is used as a connection body of multiple steel pipes.
The pipe has the following first or second joint structure of steel pipe for steel frame
It is joined. The first joint structure of steel pipes for steel frames is provided with female threads of opposite threads at the ends of a pair of steel tubes to be joined, and has a non-circular head at the center in the axial direction. A joint bolt having a male thread portion of a screw is provided, and male thread portions on both sides of the joint bolt are screwed into female thread portions of the steel pipes. The second steel joint structure of the steel frame frame is the same as the first joint structure.
Wherein each female screw portion, and the friction pressure bonded threaded pipe end of the steel pipe, and Ru der those of the joint bolt has a pipe shape.

Another steel frame structure of the present invention is a truss chord member.
Is a connection of multiple steel pipes, and each of these steel pipes is
It is joined with a steel pipe for steel frames 3 or 4.
A third joint structure of steel pipes for steel frame structure is a joint having a pair of steel pipes to be joined with male threads of reverse threads to each other, female threads of opposite threads on both sides and a tightening hole in the center. A sleeve is provided, and female thread portions on both sides of the joint sleeve are screwed into male thread portions of the steel pipes. The tightening hole may be a through hole or a non-through hole. A fourth steel-frame-structure steel pipe joining structure is the third joining structure, wherein each male screw portion is
And end friction pressure bonded threaded pipe portion of the steel pipe, and the joint sleeve is assumed to have a reinforcing partition axially central, Ru der those provided with the fastening holes in the reinforcing partition.

[0007]

According to the first joint structure, the pair of steel pipes to be joined can be joined to each other by simply screwing the male screw portions on both sides of one joint bolt to the female screw portions at each end. In this case, since the male screw portions on both sides of the joint bolt are reverse threads to each other, it is possible to rotate and join only the joint bolt without rotating the steel pipes on both sides. The rotation work of the joint bolt can be performed using the non-circular head in the center.
Because of these, without the need for skilled workers and special equipment,
It is possible to join quickly and with stable joining quality. Further, since there are few portions projecting to the outer circumference of each steel pipe, it is possible to safely perform the joining work and various works performed near this joining part. In the case of the second joint structure, since the threaded pipe is frictionally pressure-bonded to the end of the steel pipe, it is possible to use a thicker pipe wall than the steel pipe for the threaded pipe, and therefore to form the thread groove of the female thread. It is possible to avoid the accompanying decrease in strength of the steel pipe. Since a threaded pipe is used, threading is easier than threading a long steel pipe.
Further, since the friction pressure joining is performed, the threaded pipe can be firmly joined to the end portion of the steel pipe by a simple operation. Furthermore, since the joint bolt is pipe-shaped, there is no waste of material even if the diameter of the steel pipe is large. According to the steel frame structure of the invention of claim 1, it is possible to obtain a truss chord member having a sufficient length composed of a plurality of steel pipes by a simple, safe and quick joining work.

In the case of the third joining structure, the joining can be performed only by screwing the female thread portions on both sides of one joint sleeve into the male thread portions at each end of the pair of steel pipes. In this case as well, since the female thread portions on both sides of the joint sleeve have mutually opposite threads, only the joint sleeve can be rotated and joined without rotating the steel pipes on both sides. The joint sleeve can be rotated by inserting a tool such as Shino into the tightening hole. For these reasons, it is possible to join quickly and with stable joining quality without requiring skilled workers and special equipment. In addition, since there are few portions protruding to the outer circumference of each steel pipe, various works performed near this joint can be safely performed. In the case of the fourth joint structure described above , since each male thread portion is a threaded pipe frictionally pressure-bonded to the end of the steel pipe, it is possible to use a thicker threaded pipe than the steel pipe. The decrease in strength of the steel pipe due to the formation of the groove can be avoided. Since the threaded pipe has a reinforcing partition at the center in the axial direction, it is easy to secure rigidity and other strength. Since the tightening hole is provided in the reinforcing partition, the strength reduction due to the formation of the tightening hole can be avoided.
Since a threaded pipe is used, threading is easier than threading a long steel pipe. Since friction welding is used, the threaded pipe can be firmly joined to the end of the steel pipe by a simple operation. According to the steel frame structure of the third aspect of the present invention, a truss chord member having a sufficient length composed of a plurality of steel pipes can be obtained by a simple, safe and quick joining work.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. In this embodiment, the upper and lower chord members 3 which are the main members of the truss 2 in the steel frame structure 1 shown in FIG.
When a plurality of steel pipes 4 are connected to each other as shown in FIG. 1B, the joint structure shown in FIG. 1 is used for each joint 20. The truss 2 is formed by joining the lattice members 16 between the upper and lower chord members 3 via the joint plate 15 by bolting or the like, and the steel pipe joint portion 20 of the chord member 3 is located in the middle of the joint position of each lattice member 16. It is arranged. Both ends of the chord member 3 are joined to the steel column 17 via joint plates 18 by bolting or the like. The joining plates 15 and 18 are welded to the chord member 3 and the column 1, respectively.

In the joint structure shown in FIG. 1, female thread portions 5 having mutually opposite threads are formed at the ends of a pair of round steel pipes 4 to be joined as shown in FIG.
A and 5B are provided and joined to each other with the joint bolt 6 shown in FIG. The joint bolt 6 is a threaded pipe having a hexagonal head 7 at the center in the axial direction, and male threads 8A, 8B having opposite threads on both sides of the head 7.
Is formed. These male screw portions 8A and 8B are respectively screwed into the female screw portions 5A and 5B of the corresponding steel pipes 4 and 4. The head portion 7 of the joint bolt 6 is not limited to the hexagonal shape, and may be any non-circular shape with which a tightening tool such as a spanner can be engaged. Each of the female threaded portions 5A and 5B at the end of the round steel pipe 4 is made of a threaded pipe, and is joined to the end of the round steel pipe 4 by friction pressure joining. In the figure, the symbol a indicates the frictional pressure joint. The threaded pipes to be the female threaded portions 5A and 5B are thicker than the round steel pipe 4 and have the same outer diameter as the round steel pipe 4.

According to this structure, the head portion 7 of the joint bolt 6 is clamped and rotated by a tool such as a spanner so that the male screw portions 8A and 8B are screwed into the female screw portions 5A and 5B of the steel pipes 4 and 4, respectively. You can Since both male screw portions 8A and 8B have mutually opposite threads, the steel pipes 4 and 4 on both sides can be tightened without turning. In this way, only one joint bolt 6 needs to be turned, so even if not a skilled worker,
By tightening to the required position, the specified yield strength can be secured and stable joining can be performed. Moreover, the work efficiency is good and the joining can be performed in a short time. Further, since there is no unnecessary protrusion protruding outside the joint, the joining work and various other peripheral works can be safely performed. Furthermore, since there is no protrusion, it looks good even when the joint is left exposed. The predetermined tightening position may be determined by marking the joint bolt 6, or the screwing depth at which the head 7 of the joint bolt 6 abuts on the end surface of the steel pipe 4 may be set as the predetermined tightening position. good. Since the threaded pipes are used for the female threaded portions 5A and 5B of the steel pipes 4 and 4, those having a required strength and a thick wall can be used. Further, since the steel pipe 4 is joined by friction pressure joining, firm joining can be performed without welding distortion. It should be noted that it can be firmly joined by arc welding.

When the steel pipe 4 is the main material of the truss, the outer diameter of the joint bolt 6 is, for example, about 89.1 mm to 318.5 mm. When the outer diameter is within this range, a general electric tool can be used for tightening work. As described above, by using the joining structure of this embodiment, as shown in FIG.
The truss 2 shown in can easily have a long span. The length that can be transported by general truck is specified by the road traffic regulation etc. to a predetermined length, but a truss with a span exceeding such a regulated length can be easily constructed by using this joint structure. it can.

5 to 7 show a second embodiment of the present invention. In this embodiment, the chord member 3 of the truss 2 in the steel frame structure 1 shown in FIG. 4 is constructed by connecting a plurality of steel pipes 4, and the joining structure shown in FIG. 5 is used.
In the joining structure of FIG. 5, male threads 9A and 9B having mutually opposite threads are provided at the ends of a pair of round steel pipes 4 to be joined, and the joint sleeve 10 is used for joining.
As shown in FIG. 7, the joint sleeve 10 has female screw portions 11A and 11B of opposite threads on both sides and a tightening hole 12 at the center. The joint sleeve 10 is thicker than the steel pipe 4. A reinforcing partition 13 is provided at the center of the joint sleeve 10 in the axial direction,
This improves the rigidity and other strength of the joint sleeve 10. Reinforcing partition 1 for tightening hole 12
3 is formed so as to penetrate therethrough. Each of the male threaded portions 9A and 9B at the end of the round steel pipe 4 is formed of a threaded pipe and is joined to the end of the round steel pipe 4 by friction pressure joining via a disc-shaped or ring-shaped diaphragm 19. Diaphragm 1
Reference numeral 9 indicates both the joint portion b for the male thread portions 9A and 9B made of a threaded pipe and the joint portion c for the steel pipe 4 as friction pressure joint portions. By using frictional pressure welding as described above, sufficient joining strength can be secured as compared with the case of joining by arc welding or the like as described above.

In the case of this joint structure, by inserting a tool such as Shino into the tightening hole 12 at the center of the joint sleeve 10 and turning the joint sleeve 10, the female screw portions 11A and 11B on both sides of the joint sleeve 10 are respectively made to correspond to each other. The male threads 9A and 9B at the ends of both steel pipes 4 are screwed together. As described above, also in this embodiment, the steel pipe 4 can be joined easily and quickly by turning the joint sleeve 10 with a simple tool, and no skilled worker is required. Further, since there is no protrusion protruding to the outside at the joint, the joint work and peripheral work can be safely performed, and the appearance is improved.

In the above embodiment, the outer diameter of the joint sleeve 10 is set to be substantially the same as that of the pair of round steel pipes 4 to be joined, but as shown in FIG.
The outer diameter of the joint sleeve 10 may be larger than that of the above. Further, in each of the above-mentioned embodiments, a pair of round steel pipes 4, 4
Although the case where the steel pipe 4 is joined is shown, the same can be applied to the case where the steel pipe 4 is the rectangular steel pipe 14 as shown in FIG. 9 in the embodiment of FIGS. The structure of the joint sleeve 10 is the same as that of the example of FIG. In the case of the embodiments of FIGS. 1 to 4 as well, the steel pipe 4 can be a square steel pipe, but in that case, as shown in the examples of FIG. 6 and FIG. 9, between the threaded pipe and the square steel pipe which become the male screw portions 5A and 5B. Interpose a diaphragm. In each of the above-mentioned embodiments, one of the steel pipes to be joined to each other may be a round steel pipe and the other may be a square steel pipe.

[0016]

According to the first joint structure of steel pipes for a steel frame structure of the present invention, a pair of steel pipes to be joined are provided at their end portions with internal thread portions of mutually opposite threads, and axial direction A joint bolt having a non-circular head at the center and having male threads of opposite threads on both sides of the head is provided, and the male threads on both sides of the joint bolt are screwed into the female threads of the steel pipes. Since there are few protruding parts, it is suitable for safe work, and it is possible to join with stable work quality and with good work efficiency without requiring special dedicated equipment or skilled workers. In the second joint structure , since each female screw portion is a threaded pipe frictionally pressure-bonded to the end of the steel pipe, the female screw portion can be formed thick and strength can be secured, and the screw can be easily formed. Becomes Further, by adopting friction pressure welding, the threaded pipes can be firmly joined. Furthermore, since the joint bolt is pipe-shaped,
Even if the pipe diameter is large, there is no waste of material. The third joint structure is
A pair of steel pipes to be joined are provided with oppositely-threaded male threads on both ends, and a joint sleeve having oppositely-threaded female threads on both sides and a tightening hole in the center, and female threads on both sides of the joint sleeve. Since it is screwed into the male threaded portions of both steel pipes, like the invention of claim 1, it has a small protruding portion and is suitable for safety work, stable joining quality and work efficiency without requiring special dedicated equipment and skilled workers. Can be joined well. A fourth joint structure is a threaded pipe in which each male thread portion is frictionally pressure-bonded to an end portion of a steel pipe, and a reinforcing partition is provided at an axial center of a joint sleeve, and the tightening hole is provided in the reinforcing partition. Also in this case, the rigidity and other strength can be easily improved.
In the steel frame structure of the present invention, the chord member of the truss is used as a connection body of a plurality of steel pipes, and each of these steel pipes is connected to one of the above first to fourth
Since it is joined by one of the joining structures, it is possible to construct a truss having a sufficient span, which is constituted by connecting a plurality of steel pipes with chords easily, safely and quickly. For example, a truss with a span that cannot be transported by truck can be easily constructed.

[Brief description of drawings]

FIG. 1 is used in a steel frame structure according to a first embodiment of the present invention.
And is a front view of a joint structure of steel frames構用steel.

FIG. 2A is an end view of a steel pipe in the same joint structure,
(B) is a cutaway front view of the female screw portion in the same joint structure,
(C) is a cross-sectional view of the female screw portion.

3A is a left side view of a male screw portion of a joint bolt having the same joint structure, FIG. 3B is a front view of the joint bolt, and FIG. 3C is a right side view of the male screw portion.

FIG. 4A is a front view showing an example of a steel frame structure according to an embodiment of the present invention, and FIG. 4B is an enlarged view of a truss portion of the steel frame structure.

5 is a positive plane view of a modification of the structure for joining iron bone rack構用steel.

FIG. 6 (A) is an end view of a steel pipe in the joint structure,
(B) is a front view of the male screw part in the same joining structure, (C)
[Fig. 3] is a cross-sectional view of the same male screw part.

7A is a sectional view of a reinforcing partition in a joint sleeve having the same joint structure, FIG. 7B is a front view of the joint sleeve, and FIG. 7C is an end view of the joint sleeve.

8 is a positive plane view of another modification of the bonding structure of the iron bone rack構用steel.

[FIG. 9] (A) is still another joint structure of steel pipes for steel frames
Is a front view of a modified example of (1), and (B) is a cross-sectional view of a rectangular steel pipe to which the same joining structure is applied.

10A and 10B are a front view and a cutaway side view of a conventional example.

11A and 11B are a front view and a broken side view of another conventional example.

12A and 12B are a front view and a broken side view of still another conventional example.

[Explanation of symbols]

1 ... Steel frame structure, 2 ... Truss, 3 ... Chord material, 4, 14 ... Steel pipe, 5A, 5B ... Female screw part, 6 ... Joint bolt, 7
... head part, 8A, 8B ... male screw part, 9A, 9B ... male screw part, 10 ... joint sleeve, 11A, 11B ... female screw part, 12 ... tightening hole, 13 ... reinforcing partition

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E04B 1/58 503

Claims (4)

(57) [Claims] 1. A pair of joining members, in which a chord member of a truss is used as a connecting body of a plurality of steel pipes, and the respective steel pipes are joined together.
The opposite ends of the steel pipe of
It has a non-circular head in the center and is opposite each other on both sides of this head
Install a joint bolt with a male thread
Connect the male threads on both sides of the joint bolt to the female threads of both steel pipes.
Steel frame structure that is screwed to the part . 2. The steel frame structure according to claim 1, wherein each of the female threaded portions is a threaded pipe frictionally joined to an end portion of a steel pipe, and the joint bolt is pipe-shaped. 3. A pair of joining members, in which a truss chord member is used as a connecting body of a plurality of steel pipes, and a joining structure in which these steel pipes are joined is joined.
On the end of the steel pipe of
Has female threads of opposite threads and tightening hole in the center
The joint sleeve with
Female threads on both sides of the reeve are screwed into the male threads of both steel pipes.
A steel frame structure that has been made . 4. The male thread portion is a threaded pipe frictionally pressure-bonded to an end portion of a steel pipe, the joint sleeve has a reinforcing partition at the center in the axial direction, and the tightening hole is provided in the reinforcing partition. The steel frame structure according to claim 3.