JPH0223710Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a joining device for a beam joint between upper and lower columns constituting a steel framework in a relatively low-rise building.

[Problem that the invention attempts to solve]

The applicant has previously developed various joining devices that use joining hardware and high-strength bolts at the column-beam joints in steel frame rigid frames consisting of square steel pipe columns and steel beams.
Proposed. On the other hand, depending on the building, it may be necessary to connect the upper and lower columns as well as the columns and beams, and especially in the case of an extension to the upper floor, it is necessary to connect the upper column to the lower column. In this case, it is desirable that the column-to-column joints be structurally rigid, but in general, the connection was mainly done by on-site welding. However, on-site welding is not common because it poses problems in terms of construction management and requires skill.

The purpose of this invention is to provide a reliable joint structure with good workability that can meet the above requirements.

[Structure of the idea and its implementation examples]

The configuration which is the gist of this invention is as described in the claims section of the above-mentioned utility model registration, and its details will be explained below based on the illustrated embodiment.

Example 1 In Figures 1 and 2, the beam joint hardware A consists of a beam joint base 1 and a column insertion part 2 above it, and is made of cast steel or the like and has a rectangular hollow cross section. Each side of the part 2 is provided with a screw hole 3 having a required number of tap screws in place of nuts.

The beam joining hardware A described above is previously joined to the top of the column 4a having a square hollow cross section by factory welding or the like. At the site, the end plate 5a of the beam 5 made of I-beam steel etc. is butted and stacked on the side surface of the beam joint base of this column, and the end plate 5
The beams 5 are joined by screwing the high-strength bolts 6 into the screw holes 3 through the bolt insertion holes 5b of a. On the other hand, as shown in FIG. 4, a slit 8a is previously provided in the lower part of the upper column 4b with a square hollow cross section at the center of each side. The upper pillars are joined by inserting and fitting the lower part of the pillar 4b and screwing the high-strength bolt 6 into the screw hole 3 through the bolt insertion hole of the upper pillar 4b.

Embodiment 2 In the case shown in Fig. 3, a bolt insertion hole is bored in the beam joint base 1 of the beam joint hardware A, and the column insertion part 2
A tapped hole 3 is formed in the hole. When joining the beam 5 to the beam joint base 1, the end plates 5b are stacked on the beam joint base 1, the high strength bolts 6 are inserted into their insertion holes, and the nuts 7 are attached to the high strength bolts 6.
Screw together and tighten. On the other hand, slits 8b are previously provided at the corners of the lower part of the upper column 4b, as shown in FIG. The connection between the column insertion portion 2 and the upper column 4b is the same as in the previous embodiment.

Moreover, various shapes other than those described above can be used for the slit.

[Effect of idea]

This invention consists of the above-mentioned configuration, and by using this joining device, in the case of joints that use joining hardware at the joint between columns and beams, the upper and lower columns can be connected using one beam joining hardware, and bolted. It can be joined by fitting, and since a slit is provided on the comparatively thin column side and the connection is made, the lower part of the upper column with the slit can be easily pushed out a little, making it easy to fit. If the above-mentioned beam joint fittings are used for the pillars and beam joints on the top floor, installed at the top of the pillars, and prepared to use the jointing device of the present invention, it will be easy to expand the upper floors in the future. . Since the beam joint hardware used in the present invention does not have a beam bracket, there will be no problem in transportation even if it is attached to the pillar material by factory welding or the like in advance. Furthermore, since the thick column insertion portions can be used to connect columns using high-strength bolts, the connection becomes strong and a rigid connection can be achieved. Furthermore, since the lower end of the upper column has an open cross section due to the slit, the two are sufficiently closely attached by high-strength bolts, resulting in a friction bond and a rigid connection can be achieved.

[Brief explanation of the drawing]

FIGS. 1 and 2 are an elevational view, partially in section, of the first embodiment and a cross-sectional view of the joining fittings, and FIG. 3 is an elevational view, partially in section, of the second embodiment. . Figure 4,
FIG. 5 is a sectional view of the lower end of the upper column in FIGS. 1 and 3, respectively. A... Beam joining hardware, 1... Beam joining base, 2...
Pillar insertion part, 3...screw hole, 4a...lower column, 4b...
...Upper column, 5...Beam, 5a...End plate, 5b...Bolt insertion hole, 6...High strength bolt, 7...Nut, 8
a, 8b...Slit, 9...Welding.

Claims (1)

[Scope of utility model registration request] It consists of a beam joint base with a rectangular hollow section with a single wall thickness and a column insertion part provided on the top thereof, and a beam joint metal fitting having a screw hole with a tap screw formed on the side surface of the column insertion part. The lower part of the upper pillar with the square hollow cross section is connected in advance to the top of the lower pillar with a square hollow cross section, and the lower part of the upper pillar with the square hollow cross section, which has a bolt insertion hole and a slit in the lower part, is fitted into the pillar insertion part of the beam joining hardware. A pillar-to-column joining device for a beam joint, characterized in that the upper pillar is fitted with a high-strength bolt through a bolt insertion hole in a lower part of the upper pillar and screwed into a threaded hole on a side surface of the pillar insertion part.