JPH04371625A - Connecting device for posts - Google Patents

Abstract

PURPOSE:To obtain a high strength connection structure without use of welding at site. CONSTITUTION:One end of a cast steel connecting cylinder 11 is welded with one end of one of posts 12, 13 connected to each other and an insertion part 15 is formed as a unit likewise at the other end of connecting cylinder 11 to insert the insertion part 15 into the end of posts 13. These insertion part 15 and the end of post 13 are bolted together. And an opening 19 for the work of insertion of connecting bolts 18 from the inside is made in the connecting cylinder 11.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining device for joining steel pipe columns together on site.

0002

2. Description of the Related Art Conventionally, as a means for joining columns together on-site, as shown in FIGS. 3 and 4, at the ends of columns 1 to be joined together,
The vertical erection pieces 2 are welded to each other, and these erection pieces 2 are temporarily fastened to each other with bolts 4 via a connecting plate 3 at the site, and in this state, the columns 1 are welded to each other. .

0003

[Problems to be Solved by the Invention] As mentioned above, in the past, the pillars 1 were welded together on-site, and since the welding was done at high places, it was dangerous and difficult to control quality. However, the drawback is that it is difficult to ensure quality stability.

[0004] An object of the present invention is to make it possible to obtain high joint strength without performing on-site welding.

[0005]

[Means for Solving the Problems] In order to solve the above problems, in this invention, one of the pillars 12 and 13 that are connected to each other is
One end of the cast steel joining cylinder 11 is welded to one end, and the insertion part 15 is also integrally formed at the other end of the joining cylinder 11.
This insertion part 15 is inserted into the end of the other pillar 13, and the insertion part 15 and the end of the pillar 13 are joined with bolts,
The joining cylinder 11 is provided with a working opening 19 into which the joining bolt 18 is inserted from inside.

[0006]

[Operation] At the site, the insertion part 15 of the cast steel joining cylinder 11 is
may be inserted into the end of the other column 13 and bolted together.

[0007]

[Embodiment] In FIGS. 1 and 2 showing an embodiment of the present invention, 11 is a hollow joining cylinder of the invention, and 12 and 13 are upper and lower parts to be joined to each other via this joining cylinder 11. It shows the pillars. The joining cylinder 11 has an outer shape similar to that of the pillar 12.
, 13, but is formed thicker than the pillars 12 and 13. An insertion portion 15 having a smaller cross section than the main body portion 14 is integrally formed at one end of the joining cylinder 11. A bolt hole 16 for joining the columns 12 and 13 is formed in this insertion portion 15, and a bolt hole 17 of the same diameter is formed at the end of the column 13 on the lower side in the figure correspondingly. be.

Furthermore, the main body portion 14 of the joining cylinder 11 includes:
Working openings 19 are formed in these bolt holes 16 and 17 for inserting bolts 18 from inside. The size of this opening 19 is such that an operator can put his/her hand into it. On the other hand, at the end opposite to the insertion section 15, a welding groove section 20 having a tapered shape that becomes narrower toward the tip is formed.

The groove portion 20 and the insertion portion 15 are integrally formed when the joining cylinder 11 is cast. The ends of the pillars 12 on the upper side of the figure are welded together, and the pillars are transported to the site at this stage.

At the site, after the lower column 13 is installed, the insertion part 15 of the joining cylinder 11 welded to the lower end of the upper column 12 is inserted into the upper end of this column 13 from above. Install.

After that, insert your hand into the opening 19 of the main body of the joining cylinder 11 and tighten the tightening bolt 18.
It is inserted into the bolt holes 16 and 17 of the columns 12 and 13 and the insertion part 15 from the inside, and a nut 21 is screwed onto the tip of the bolt 18 from the outside and tightened and fixed. At this time, the bolt 18 is connected to the tip of the bolt 18 and the nut 21.
A high-strength bolt is used that can be gripped at the same time and tightened from one side.

The tip of the insertion portion 15 is cut diagonally to facilitate positioning during insertion.

[0013]

[Effects of the Invention] As described above, in this invention, the insertion part protruding from the cast steel joining cylinder is inserted into the end of one column and tightened with bolts, and welding is not possible on site. Therefore, unlike on-site welding, high-precision joining can be achieved reliably.

Moreover, since it is only necessary to tighten the bolts, the workability is much better than when the erection piece is temporarily fastened with bolts and then welded.
Moreover, there is an effect that the number of parts can be reduced. In this case, since the insertion portion is inserted and bolted, sufficient strength can be obtained.

On the other hand, one end of the joining cylinder is welded to the end of the column in advance, but since this welding is done in a factory, quality control is easy and stable quality can be obtained. It will be done.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a column joint showing an embodiment of the present invention.

FIG. 2 is a longitudinal cross-sectional view of the joint portion.

FIG. 3 is a side view showing a conventional joining structure.

FIG. 4 is a cross-sectional view as well.

[Explanation of symbols]

11　Cylinder for joining 12 pillars 13 Pillar 15 Insertion part 18 bolts 19 Opening

Claims (2)

[Claims] Claim 1: One end of a cast steel joining cylinder is welded to one end of one of the pillars to be joined to each other, an insertion part is integrally formed at the other end of the joining cylinder, and this insertion part is connected to the other end of the joining cylinder. It is inserted into the end of a column to bolt the insertion part and the end of the column, and the joining cylinder is provided with a working opening for inserting the joining bolt from inside. Column-to-column joining device. 2. The apparatus for joining pillars according to claim 1, wherein a groove for welding is provided at the end of the welding portion of the joining cylinder with the pillar.