JPH0243921Y2 - - 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 a joint hardware is used at the column/beam joint in a steel frame rigid frame consisting of a square steel pipe column and a steel beam, screw holes are provided in the joint hardware, and the steel beam is screwed to the joint hardware. . (Tokuko Showa 61-
(Refer to Publication No. 58620) By the way, when screwing steel beams, it is required to screw relatively large diameter screws quite deeply in terms of strength and rigidity. In particular, for rigid joints between columns and beams 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 screw holes 2 with tap screws 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 outward, and the peripheral edges of the plurality of screw holes 2 are continuous in the horizontal direction.

Square steel pipe columns 3 are abutted against the upper and lower ends or either one of the ends of this metal joint 1 with their end faces facing each other, and connected by factory welding or the like. 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.

In the embodiment shown in FIG. 2, the joining plates 5 of the steel beams 4 are formed into a box shape, the side surfaces of the joint metal fittings are made to protrude into a box shape, and the screw holes 2 are drilled diagonally. In this case, since the screw is inserted diagonally, the web or flange of the steel beam 4 does not get in the way when using the tightening tool, resulting in good workability.

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. especially,
A sufficiently long screw hole can be formed by making the joining hardware made of cast steel, connecting the peripheral edges of the screw hole in the horizontal direction, and making the outside thicker. In addition, costs can be reduced by making only the necessary parts thicker and making the overall weight relatively lighter.

[Brief explanation of the drawing]

FIG. 1 is an exploded front view showing a partial cross section of the first embodiment, and FIG. 2 is a cross-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] A steel joint where multiple screw holes are formed on the side of the joint between a steel column and a steel beam, the outside diameter of which is equal to that of the steel column, and the periphery of the multiple screw holes is connected horizontally to create a thick wall on the outside. A column is connected to the end of the metal fitting, and a joint plate, which is welded to the end of the steel beam, is connected to the metal beam by a high-strength bolt screwed into the screw hole. Characteristic column and beam joining equipment.