JPS6341442Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a device for joining columns and beams that constitute a steel frame in a relatively low-rise building.

The applicant previously developed a structure in which joint hardware is used at the column and beam joints in a steel frame rigid frame consisting of square steel pipe columns and steel beams, screw holes are provided in the joint hardware, and the steel beams are screwed to the joint hardware. . (Jitsugan 56-
(Refer to No. 37760) By the way, when fixing steel beams with screws, it is required to screw relatively large diameter screws quite deeply in terms of strength and rigidity. In particular, for column and beam joints in steel frame frames, it is required that the thickness of the threaded portion into which the bolt is screwed be increased. However, it is not preferable to make the joining metal parts thick from both the weight and economical standpoints.

This invention was devised in view of the above circumstances, and its details will be explained below with reference to illustrated embodiments.

In the embodiment shown in FIGS. 1 and 2, the joining hardware 1 is made of cast steel and has a rectangular hollow cross section, and a required number of threaded holes 2 with tab threads in place of nuts are formed on the side surface thereof. The peripheral edge A of this screw hole 2 is formed thick. This thick portion protrudes toward the inner surface of the hollow, and although the peripheral edges of the plurality of screw holes 2 are continuous in the horizontal direction, they may be continuous in the vertical direction. Further, the thick portion may not be continuous, but may be present for each screw hole.

A rectangular steel pipe column 3 having a closed cross section is connected to the upper and lower ends or either one of the ends of the joining metal fitting 1 by butt factory welding or the like with the end faces facing each other. Further, a joint plate 5 having a thick wall that can resist various stresses is fixed to the joint end of the steel beam 4, and a high-strength bolt 6 is inserted into the joint plate 5 and screwed into the screw hole 2. The steel beam 4 is joined to the joining hardware 1 by the above-mentioned method, and the high-strength bolts are tightened to introduce tension to bring the joining plate and the joining hardware into close contact, thereby ensuring a degree of fixation.

3 and 4, a flange 7 is provided protruding from the inner surface of the metal fitting 1, and a screw hole 2 is inserted into the flange 7.
This flange 7 also serves to reinforce the joint metal fitting 1.

This invention has the above-mentioned structure, and by using joint hardware, which is a joint hardware, at the joint between steel columns and beams, the structure of the joint can be made simple, and manufacturing and transportation can be facilitated. In addition, since the steel columns and beams can be rigidly connected using high-strength bolts, assembly is extremely easy, and a steel rigid frame structure can be realized while saving labor and shortening the on-site work. In particular, by making the joint hardware made of cast steel and making the periphery of the internal screw hole thick, there are no protruding parts on the outside of the column, making workability in manufacturing, transportation, erection, etc. good, and adhesion with the joint plate. It has excellent properties and is structurally effective. Furthermore, it is possible to form a screw hole of sufficient length, and by thickening only the necessary parts, the overall weight is relatively light, thereby reducing costs.

[Brief explanation of the drawing]

1 and 2 are exploded front views showing a partial cross section of the first embodiment, FIG. 2 is a cross-sectional view, and FIG.
FIG. 4 is a plan view and a sectional view of the second embodiment. 1... Joining hardware, 2... Screw hole, 3... Pillar, 4
...Beam, 5...Joining plate, 6...High strength bolt, 7...Flange.

Claims (1)

[Scope of utility model registration request] At the joint between a closed cross-section steel column and a steel beam, a joint metal fitting having an outer diameter equal to that of the steel column and having a screw hole formed on its side surface and a thick wall around the screw hole on the inner surface,
A column and beam joining device, characterized in that a column is welded to an end of the joining hardware, and a steel beam joining plate is joined to the joining hardware by screws screwed into the screw holes.