JP3881354B2 - Bonding structure of square steel pipe column - Google Patents

Description

The present invention relates to a joint structure of RHS Column in Steel Building like.

Conventionally, when the upper and lower sides of the rectangular steel pipe columns are rigidly joined, the ends of the upper and lower steel pipe columns are joined together by welding on site.
However, welding the upper and lower steel pipe columns to each other in this way is not only bad in the working environment but also affected by the weather, and the accuracy of joining is highly dependent on the skill of the welding operator and the quality is unstable. Therefore, there are many problems such as putting effort into quality inspection after welding.

Therefore, as shown in FIG. 3 , a joint structure has been proposed in which the upper and lower rectangular steel pipe columns 50 and 51 are rigidly joined to each other via a joint hardware.
That is, in this joint structure, a joint metal 52 formed by welding four vertical pieces 54 arranged in a square tube shape on the plate 53 is welded to the upper end of the lower square steel pipe column 51, and the lower end of the upper square steel pipe column 50. Are fastened to the joint hardware 52, and the high-strength bolt 55 inserted through the bolt insertion holes 50a and 54a is fastened to the welding nut 56 on the back surface of the upright piece 54 to be joined.

However, in the said structure, since the plate 53 protrudes on the outer periphery of the steel pipe column 50, and the protrusion of the plate 53 is eliminated, the head of the high strength bolt 55 protrudes to the outside of the steel pipe column 50. There is a problem that it gets in the way of finishing.
In addition, if a joining metal object is provided between the upper and lower steel pipe columns instead of providing the standing piece 54 and the joining metal object is made thin, it is possible to prevent the bolt head from protruding, but the rigidity of the joining part is reduced. .

The present invention eliminates such problems, the joint bolt does not protrude to the outside of the steel pipe column, and the fit around the column is good, the rigidity of the joint can be secured, and no on-site joining work is required. and to provide a junction structure of RHS column capable of performing a bolt by welding.

The joining structure of the rectangular steel pipe columns of the present invention is such that the upper and lower joining hardware made of cast steel are welded to the end faces of the upper and lower rectangular steel pipe pillars, and the upper and lower joining hardware are end plates stacked on each other. Each part is provided. Further, the upper and lower joining hardware are provided with four hollow portions having openings for bolting work at the four corners, respectively. Partition wall between the hollow portions hardware center portion rather thin, is a cross-sectional shape in which the outer surface portion becomes thicker and thicker gradually curved to the outer surface, wherein the hollow section than the width of the opening The width of the middle part between the opening and the innermost part is widened, and the upper and lower joining hardware are joined with four bolts that are respectively arranged in the hollow parts and penetrate the end plate part.
According to this structure, the end plate parts of the upper and lower joint metal parts welded to the upper and lower rectangular steel pipe columns are overlapped, and a hand or a tool is inserted into the four hollow parts of each joint metal part from the bolting opening. By bolting, it is possible to join with good workability without requiring on-site welding. Since each bolt is arranged in the hollow part of the joint hardware, the bolt head or the like does not protrude outside the square steel pipe column, and the arrangement of the peripheral members and the design fit are good. Each joint metal is made of cast steel, and the partition wall between the hollow parts has a cross-sectional shape with a thick outer surface part, so that rigidity against bending or the like is secured while providing the hollow part as described above. .
In the above-described configuration, instead of one of the upper and lower joining hardware, using a cast steel joining hardware having an end plate portion that overlaps the other joining hardware and having a thickened bolted portion of the end plate portion. Also good. A screw hole is formed in the thick portion of the end plate portion. These upper and lower joining hardware are joined by inserting a joining bolt through a bolt insertion hole in an end plate portion of the other joining hardware and screwing into the screw hole.
Even in such a configuration, the bolt joining operation can be performed by inserting a hand or a tool into the hollow portion of either the upper or lower joining hardware. In addition, since the other joint hardware does not have an opening on the outer surface, it is easy to ensure rigidity in combination with the cast metal.

In the joining structure of the rectangular steel pipe columns of the present invention, the upper and lower joining hardware are welded to the end surfaces of the upper and lower rectangular steel pipe pillars, and the upper and lower joining hardware are provided with end plate portions that are overlapped with each other, and The joint hardware is provided with four hollow portions having openings for bolting operation at the four corners, and the upper and lower joint hardware are respectively disposed in the hollow portions and are provided with four bolts penetrating the end plate portions. Since it is configured to be joined, the bolt head or the like does not protrude to the outside of the square steel pipe column, and the construction and design around the column are good. Also, on-site welding is not required, and only bolt joining work is required on site, so that workability is good. Moreover a respective joint fittings are cast steel resistance, and a partition wall between the hollow portion, hardware central portion rather thin, outer surface portion thicker gradually curved to the outer surface side is a cross-sectional shape which is thick , each hollow section is easy because the than the width of the opening is a shape in which the width is widened intermediate portion between the opening and the deepest portion, to secure the rigidity.
In the above-described configuration, instead of either one of the upper and lower joint hardware, using a cast steel joint hardware having an end plate portion that overlaps the other joint hardware and having a bolted portion of the end plate portion thickened, When the screw hole is formed in the thick part of the end plate part, and the upper and lower joint metal parts are joined by screwing the joint bolt inserted from the bolt insertion hole of the end plate part of the other joint metal part into the screw hole, A joint metal in place of one of the metal joints can have a closed cross section, and it is easier to ensure rigidity. Further, since the screw hole is formed in the thick part of the end plate portion, the use of both screw bolts as the joining bolt makes it easy to perform construction management such as fixing the tightening axial force.

An embodiment of the present invention will be described with reference to FIG. In this embodiment, the upper joint metal 10 and the lower joint metal 11 are welded to the end surfaces of the upper and lower rectangular steel pipe columns 1 and 2, respectively, and the end plate portions 12 and 13 provided on the both joint metal 10 and 11 are overlapped. The both end plate portions 12 and 13 are joined by bolts 14 such as high strength bolts.

The upper and lower joining hardware 10 and 11 are made of cast steel, and four hollow portions 15 having openings 15a for bolting work are provided at four corners, respectively. Each of these hollow portions 15 is partitioned by a partition wall 16 having a cross-sectional outline. Sectional shape of the partition wall 16, thin hardware center as shown by the horizontal sectional view in Fig. 1 (B), there is a thickened shape gradually quadratic curve shape to the outer surface side. Bolt insertion holes (not shown) through which the bolts 14 are inserted are provided in portions of the upper and lower end plate portions 12 and 13 corresponding to the four hollow portions 15. The bolts 14 are inserted into the bolt insertion holes and the upper and lower end plate portions 12 and 13 are tightened to join the upper and lower rectangular steel pipe columns 1 and 2 together.

If this configuration, by previously performing beforehand the welding of each joint fittings 10 and 11 to the end face of the RHS Column 1 and 2 above under factory, in the field end plate 12 of the joining fittings 10, 11 , 13 can be easily firmly joined to each other by simply tightening the bolts 13 and bolting each other. Moreover, the bolt joining operation can be easily performed by inserting a hand into the hollow portion 15 from the opening 15a of the joint hardware 10 and 11, and the bolt 14 is also accommodated in the hollow portion 15 of the joint hardware 10 and 11. So it will not get in the way of construction and finishing.

The embodiment shown in FIG. 2 uses a box-shaped joint metal 11 </ b > A instead of the lower joint metal 11 in the joint structure of the embodiment of FIG. 1 . This metal joint 11A is made of cast steel in which the bolted portion of the end plate 13A that overlaps the upper metal joint 10 is thick, and a screw hole 17 is formed in the thick part of the end plate 13A. . The bolts 14 are inserted from the bolt insertion holes 18 of the upper metal fitting 10 aligned with the screw holes 17, and the bolts 14 are screwed into the screw holes 17, thereby joining the upper and lower end plate portions 12 and 13 </ b> A. Thereby, the upper and lower rectangular steel pipe columns 1 and 2 are joined to each other. It should be noted that the upper joint metal 10 and the lower joint metal 11A may be used interchangeably.

(A) is a perspective view which shows the joining structure of the square steel pipe pillar concerning 1st Embodiment of this invention, (B) is the horizontal sectional drawing. (A) is a perspective view which shows the joining structure of the square steel pipe pillar concerning other embodiment of this invention, (B) is the partially broken front view, (C) is the horizontal sectional view, (D) is the figure ( B) DD line arrow directional view, (E) is the EE sectional view taken on the line (B). It is a disassembled perspective view which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Upper square steel pipe pillar 2 ... Lower square steel pipe pillar 10 ... Upper joint metal fitting 11 ... Lower joint metal fitting 12, 13 ... End plate part 14 ... Bolt 15 ... Hollow part 15a ... Opening 16, 16A ... Partition wall 17 ... Screw Hole 18 ... Bolt insertion hole

Claims (2)

The upper and lower joint hardwares made of cast steel are welded to the end faces of the upper and lower rectangular steel pipe columns, and the upper and lower joint hardwares each have end plate portions that overlap each other, and the upper and lower joint hardwares are bolted. each have four hollow portion with an opening at the use in the four corners, the partition wall between the hollow portions hardware center portion rather thin, thick outer surface portion thicker gradually curved to the outer side wall Each hollow part has a shape in which the width of the intermediate part between the opening and the innermost part is wider than the width of the opening, and upper and lower joining hardware are respectively disposed in the respective hollow parts. And a joined structure of square steel pipe columns joined by four bolts penetrating the end plate portion.   In the joining structure of the square steel pipe column of Claim 1, it has an end plate part which overlaps with the other joining metal fitting instead of either upper and lower joining metal fittings, and the bolting location of the end plate part becomes thick. Using a cast steel joint metal, a screw hole is formed in the thick part of the end plate part, and a joint bolt inserted from the bolt insertion hole of the end plate part of the other joint metal part is screwed into the screw hole and Bonding structure of square steel pipe columns with bonded metal fittings.

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