JPH0711162B2 - Joint structure of steel members with closed cross section and other steel members - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a steel member having a closed cross section, which is applied when, for example, a column made of a rectangular steel pipe or the like and a steel beam made of an H-shaped steel are joined. The present invention relates to a joint structure with another steel frame member.

[Conventional technology]

In general, in a building having a steel frame structure, a square-section steel pipe, a circular steel pipe or the like having a closed cross-section is used for a column, and a beam is often made of an I-section steel or an H-section steel.

In addition, this type of column and beam is such that a bracket is projected on the beam joint part of the column and the beam end is attached to this bracket with a flange plate or splice plate, etc., or is directly welded. And then joined.

[Problems to be Solved by the Invention]

However, in such a joint structure, it is extremely difficult to bolt the bracket to the beam joint of the column, and therefore, in many cases, the bracket is attached to the beam joint of the column by welding, which results in complicated machining. In addition, welding is often required, and there is a problem that joining is extremely troublesome.

The present invention has been made to solve the above problems, and joins a steel frame member having a closed cross section and another member capable of easily joining a steel frame member having a closed cross section and another steel frame member. It is intended to provide a partial structure.

[Means for solving problems]

The joint structure between a steel member having a closed cross section and another steel member according to the present invention has a tubular body inserted into a mounting hole formed in a side portion of a steel member having a closed cross section, and a screw threaded to the tubular body. Combined,
A fixing nut for fixing the tubular body, a joining bolt screwed to the tubular body and joining another steel frame member to the steel frame member having the closed cross-section, and a connecting bolt screwed to the joining bolt to loosen the joining bolt. A locking nut for fixing the locking nut so that the cylindrical body does not have a male screw portion to which the fixing nut is screwed on the outer periphery and an outer end portion thereof, and a flange portion which is locked to an edge portion of the mounting hole. And a female screw portion having an inner periphery capable of screwing the joining bolt, and is formed by being split into a plurality of portions in the circumferential direction.

〔Example〕

Hereinafter, a description will be given based on an embodiment illustrating a joint portion structure of a steel frame member having a closed cross section and another steel frame member according to the present invention. In FIGS. 1 to 15, reference numeral 1 indicates a rectangular steel pipe or the like. Steel member with closed cross section, 2 fixed nuts, 3 cylindrical body, 4
Is a locking nut, and reference numeral 5 is a joining bolt for joining another steel frame member such as a beam to the beam joint portion of the steel frame member 1 through a joint metal fitting such as a bracket.

The cylindrical body 3 is formed into a cylindrical shape that can be inserted into a mounting hole 6 formed in a side portion of the steel frame member 1, and a male screw portion 7 into which the fixing nut 2 can be screwed is formed on the outer periphery thereof. , Cylinder 3
The inner circumference of the has a screw hole 8 into which the joining bolt 5 can be screwed (see FIGS. 4, 6, and 8).

Further, the number of the cylindrical bodies 3 is two to three in the circumferential direction (see FIG. 11 and FIG.
(See FIG. 15) or divided into four pieces (see FIG. 13), and the outer end of the cylinder body 3 is locked to the edge of the mounting hole 6 by the inner diameter of the mounting hole 6. Collar part 9 which is one size larger
And a tooth profile 10 (fourth,
(See FIG. 5) or spanner hook 11 is formed (see FIGS. 7 and 9).

In addition, a convex portion 13 and a concave portion 14 are formed at the edge portions of the respective divided bodies 3a of the divided cylindrical body 3 (the tenth to tenth portions).
(Refer to FIG. 15), when a plurality of divided bodies are assembled together by tying, the divided bodies 3a are prevented from being laterally displaced by engaging with each other.

Further, the distal end portion of the tubular body 3 is tapered (see FIG. 8), so that the tubular body 3 can be easily inserted into the mounting hole 6 and screwed into the fixing nut 2.

The cylindrical body 3 thus formed is inserted into the mounting hole 6 from the outside to the inside, and is fixed by screwing the fixing nut 2 into the male screw portion 7.

In order to screw the fixing nut 2 into the male screw portion 7 of the cylindrical body 3, the fixing nut 2 is fixed so as not to rotate, and a jig such as a spanner is hooked on the tooth profile 10 or the spanner hook 11 of the collar portion 9. , Turn this jig and tighten it.

The fixing nut 2 is screwed into the male screw portion 7 of the tubular body 3,
It is a nut for fixing the tubular body 3 so as not to fall out of the mounting hole 6, and the locking nut 4 is a nut that is screwed into the joining bolt 5 and fixes the joining bolt 5 so as not to loosen.

In this case, the flange portion 9 of the tubular body 3 may be omitted, and the tubular body 3 and the locking nut 4 for fixing the joining bolt 5 so as not to loosen may be integrally formed (see FIG. 2).

Subsequently, a mounting method will be described.

First, the mounting hole 6 is formed in the beam joint portion of the steel frame member 1,
The fixing nut 2 is attached to the back side of the attachment hole 6 (16th
See figure).

To attach the fixing nut 2, the fixing nut 2 is temporarily fixed to an angle member, wood, etc., and is inserted inside the steel member 1,
Temporarily fix on the back side of the mounting hole 6.

Next, the cylinder 3 is inserted into the mounting hole 6 from the outside, and the male screw portion 7 of the cylinder 3 is screwed into the fixing nut 2 to fix the cylinder 3 in the mounting hole 6 (see FIG. 17). .

In addition, the work of ~ shall be performed at the time of steel frame processing in the factory.

Next, at a construction site, when attaching a bracket or the like, the joining bolt 5 is screwed into the screw hole 8 of the cylinder body 3 (18th
See figure).

In this case, the loosening prevention nut 4 is screwed into the joining bolt 5, the joining bolt 5 is screwed, and then the loosening prevention nut 4 is tightened to fix the joining bolt 5 so as not to loosen.

FIG. 19 shows a beam joining method by the so-called paddle construction method, in which a male fitting 12 formed in an oar shape is screwed into a screw hole 8 of the cylindrical body 3 by screwing a male screw portion 12a at the tip thereof. The steel beams are attached and joined to the flange portion 12b on the rear end side by bolting, and the attaching method is substantially the same as that of the above-described embodiment.

In addition, although the joint structure of the column and the beam in the steel frame structure has been described in the embodiment, the present invention is not limited to this, and the column and the screw bar of the steel frame reinforced concrete structure can be joined (see FIG. 20).

〔The invention's effect〕

Since the present invention is configured as described above, it has the following effects.

Even for steel members with closed cross-sections such as square steel pipes and circular steel pipes, bolts can be tightened from the front side, so other steel members such as beams can be easily joined via joining brackets such as brackets. effective.

Further, since a tooth shape or a spanner hook is formed on the flange portion of the tubular body, when fixing the tubular body to the mounting hole of the steel member with a fixing nut, hook a jig such as a spanner on the tooth shape or spanner hook, There is an effect that the jig can be easily and firmly fixed by rotating the jig.

Further, since the loosening prevention nut is screwed onto the joining bolt, there is an effect that the joining bolt is prevented from loosening and the steel members can be reliably joined to each other for a long period of time.

Further, since the cylindrical body is formed by being divided into a plurality of parts in the circumferential direction, it is easy to mount it in the mounting hole of the steel frame member having a closed cross section, and it is easy to make a slight dimensional error in the outer diameter of the joining bolt. There is an effect that can correspond to.

[Brief description of drawings]

1, 2, and 3 are longitudinal sectional views, FIG. 4, and FIG. 6 showing an embodiment of a joint structure between a steel member having a closed cross section and another steel member according to the present invention. , And FIG. 8 are partially cutaway side views of the tubular body, FIGS. 5, 7, and 9 are side views thereof, and FIGS. 10, 12, and 14 are side faces of a divided body of the tubular body. Figures 11, 11 and 13 are cross-sectional views of the cylinder,
Figures 17, 17 and 18 are vertical cross-sectional views of joints showing the method of joining steel members with closed cross-sections and screw rebars, and Figure 19 is a longitudinal section showing the method of joining columns and beams by the paddle construction method. Figure, No. 20
The figure is a cross-sectional view showing a method for joining a steel member having a closed cross section and a screw reinforcing bar. 1 ... steel member, 2 ... fixing nut, 3 ... cylindrical body, 4 ...
… Loosening prevention nut, 5 …… Joint bolt, 6 …… Mounting hole,
7 ... Male screw part, 8 ... Screw hole, 9 ... Collar part, 10 ... Tooth profile, 11 ... Spanner hook, 12 ... Joining metal part, 13 ... Convex part,
14 …… Concave, 15 …… Screw rebar.

Claims (1)

[Claims] 1. A tubular body inserted into a mounting hole formed in a side portion of a steel frame member having a closed cross section, a fixing nut screwed into the tubular body to fix the tubular body, and the tubular body. The joint cylinder is screwed to join the other steel frame member to the steel frame member having the closed cross section, and a locking nut that is screwed onto the joint bolt and fixes the joint bolt so as not to loosen. The body has a male screw portion to which the fixing nut is screwed, and a collar portion to be locked to the edge portion of the mounting hole, respectively on the outer periphery and the outer end portion thereof, and the inner periphery of the body screws the joining bolt. A joint structure of a steel frame member having a closed cross section and another steel frame member, which is formed by forming a female screw part that can be fitted and is formed by being divided into a plurality of pieces in the circumferential direction.