JPH0333845Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a device for joining upper and lower columns constituting a steel framework in relatively low-rise buildings, particularly two- and three-story buildings.

[Problem that the invention attempts to solve]

The applicant has previously developed and proposed various joining devices that use joining metal fittings and high-strength bolts at the column-beam joints in steel frame rigid frames consisting of columns made of square steel pipes and steel beams. On the other hand, depending on the building, it may be required to connect the upper and lower columns as well as the columns and beams, and especially in the case of extensions to the upper floors, it is necessary to connect the upper column to the top of the lower column. . At that time, it is desirable for the column-to-column joints to be rigidly connected from a structural standpoint, but in general, such connections were mainly made by on-site welding. However, on-site welding requires sufficient and reliable construction management, and there are problems in that the welding personnel need to be highly skilled.

This invention aims to solve the above-mentioned problems and provide a column-to-column joining device that can meet the above-mentioned demands and achieves reliable joints with good workability.

[Means for solving problems]

The pillar-to-column joining device of this invention consists of a thick-walled square rectangular cross-section base at the top of the lower pillar of the square steel pipe and a pillar insertion part provided on the top of the base as described in the above-mentioned utility model registration claims. A joint metal fitting is provided, and a bolt insertion hole is provided in the lower part of the square steel pipe, and a slit with a length equal to or shorter than the pillar insertion portion of the joint metal piece is inserted into the upper pillar of the joint metal piece in at least an adjacent lower corner. This is a pillar-to-column joining device characterized in that the two are placed in a section, fitted together, and joined with bolts, and by using this pillar-to-column joining device, the upper pillar can be joined with bolts. The above problems are solved. In this column-column joining device, the length of the slit is set to be less than the column insertion portion, since if it becomes longer than the column insertion portion, a cross-sectional defect will remain in the upper column. In addition, by providing slits in adjacent corners, it is easy to insert the upper pillar with a minimum number of slits, and since it is possible to make a sufficient close contact and reliable bolt connection can be expected, at least provided in the corner.

The details will be explained below based on illustrated embodiments.

〔Example〕

Example 1 In FIGS. 1 and 2, the joining hardware A is made of cast steel and has a square rectangular cross section, consisting of a thick base 1 and a thick column insertion part 2. A screw hole 3 with a required number of tap screws in place of a nut is formed on each side surface of the bolt 2, and its wall thickness is approximately equal to the nominal diameter of the high-strength bolt. On the other hand, high-strength bolts are usually 16 mmφ to 24 mm in low-rise buildings.
mmφ is used. The above-mentioned joining hardware A is previously welded to the top of the lower column 4a made of a square steel pipe by welding 9 in a factory. At the site, after installing the lower pillar 4a, the base 1 of this joining hardware A is
The end plates 5a of the steel beams 5 made of I-beams are butted against the side surfaces of the steel beams 5, and the high-strength bolts 6 are screwed into the screw holes 3 through the bolt insertion holes 5b of the end plates 5a to join the steel beams 5. be done. In this case, it can be expected that the wall thickness is approximately equal to the diameter of the high-strength bolt to achieve effective rigid joining of the steel beams. In the case of low-rise buildings, the wall thickness of square steel pipes used as columns is 2 to 10 mm. On the other hand, in the lower part of the upper column 4b made of a square steel pipe, a slit 8a is formed in advance as shown in
A bolt insertion hole is provided at each corner, and a bolt insertion hole is provided on the side surface as shown in FIG. Also, the slit is fixed at a position lower than the center of the uppermost bolt insertion hole provided at the bottom of the upper column. Then, insert the lower part of the upper pillar 4b, which has the slit previously provided in the corner part, into the outer periphery of the pillar insertion part 2, fit them together, and fit the upper pillar 4b.
The high-strength bolt 6 is screwed into the screw hole 3 through the bolt insertion hole provided at the lower part of b to join. Note that if the length of the slit is longer than the column insertion part, it will leave a section missing in the column, so the length should be less than the column insertion part, but it will be more effective when tightening with high-strength bolts. Therefore, the range up to the above position is more preferable. In addition, slits are provided at each corner, making it easy to insert the upper pillar with a minimum number of slits, and making it possible to make it fit tightly.
You can expect reliable high-strength bolts to join.

Example 2 The one shown in Fig. 3 is the thick base 1 of the joining hardware A.
A bolt insertion hole is drilled in the column, and a screw hole 3 with a tapped screw is formed in the thick column insertion part 2, and the thickness of the hole is approximately equal to the nominal diameter of the high-strength bolt. has. In this joining hardware A, when joining the steel beam 5 made of I-shaped steel to the base 1, the end plates 5a of the steel beam 5 are stacked on the side surface of the base 1, and the high-strength bolts 6 are inserted into the bolt insertion holes. , Natsuto 7
screw onto the high-strength bolt 6 and tighten. On the other hand, in the lower part of the upper column 4b made of a square steel pipe, slits 8b are formed in advance at each corner as shown in Example 1.
A bolt insertion hole is also provided on the side. As in the embodiment, the slit is fixed at a position lower than the center of the uppermost bolt insertion hole provided at the bottom of the upper column. and,
The connection between the column insertion part 2 and the upper column 4b is the same as in the first embodiment.

In the above embodiments, the column-beam joints are examples, but the column-column joining device of the present invention can be used even in the middle part below the column-beam joints.

[Effect of idea]

This invention consists of the above-mentioned structure, and by using this column-column joining device, the upper and lower columns can be joined with one joining hardware, and can be joined by bolting and fitting, and at least the adjacent column at the lower end of the upper column can be joined with one joining hardware. Since a slit is provided at each corner, the upper column can be easily fitted into the column insertion portion of the joining hardware. In particular, by providing the joint hardware at the top of the column on the top floor, it will be easier to extend the building to an upper floor in the future. Furthermore, since the slit is provided with a length that is less than the length of the column insertion part, there is no cross-sectional loss in the upper column, and the bolts create a friction bond between the lower part of the upper column and the column insertion part of the joining metal. , a strong bond can be achieved.

[Brief explanation of the drawing]

FIGS. 1 and 2 are a partially sectional elevational view of Example 1 and a cross-sectional view of the joint metal fittings. FIG. 3 is a partial cross-sectional elevational view of the second embodiment, and FIG. 4 is a cross-sectional view of the lower end of the upper column. A... Joining hardware, 1... Base, 2... Column insertion part, 3... Screw hole, 4a... Lower column, 4b... Upper column, 5... Steel beam, 5a... End plate, 5b... ...Bolt insertion hole, 6...High strength bolt, 7...Nut, 8
...Slit, 9...Welding.

Claims (1)

[Scope of utility model registration request] At the top of the lower pillar of the square steel pipe, a joining hardware consisting of a base with a thick square rectangular cross section and a pillar insertion part provided on the upper part is provided, and a bolt insertion hole is provided in the lower part, and at least the adjacent lower corner part is provided. An upper column of a square steel pipe with a slit having a length equal to or shorter than the column insertion portion of the joining hardware is inserted into the column insertion portion of the joining hardware, and the two are fitted and joined with bolts. Column/column joining device