JPH06264499A - Device for joining beam - Google Patents

Abstract

PURPOSE:To make it possible to easily insert a joint bolt into a bolt hole even when a beam is supported by a temporary bolt and then the beam is moved downward by its own weight, in the case that the end of a beam is attached to the vertical side of a column or the like by means of a temporary bolt beforehand and thereafter the end of the beam is fixed by means of a permanent bolt. CONSTITUTION:Clearances of bolt holes 5, 10 for insertion of temporary bolts 12 are made smaller than those of bolt holes 4, 9 for insertion of joint bolts 11. And a beam 7 is joined and supported only by the temporary bolt 12 so that the slippage of the position of the bolt hole 4 is limited within the clearance of the bolt hole 5, which is smaller than that of the hole 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a beam joining device, and more particularly to a beam joining device for joining an end plate or the like at the end of a beam to a vertical surface such as a bracket of a column with a joining bolt.

[0002]

2. Description of the Related Art As described above, when joining the end of a beam to a vertical surface such as a column with a joining bolt, first, the beam hoisted by a crane is placed in a horizontal state and the end play of the beam end is made into a column. And the bolt holes are positioned and the bolts are inserted and joined. In this case, in addition to the multiple joining bolts for joining, a bolt for temporary tightening is used.Before joining with the joining bolt, while temporarily tightening with this temporary bolt, the beam of each part is attached and built.
After adjusting the streets, the joint bolts are then inserted and fully tightened.

[0003]

As described above, when the joining bolt is inserted, the joining bolt is already removed from the crane and is supported only by the temporary bolt, and the joining bolt is not in an unstable state such as a suspended state. There is an advantage that the bolt tightening work is easy. However, since the beam itself has a considerable weight, since it descends within the range of the gap between the temporary bolt and its bolt hole, there is a positional shift between the final tightening joint bolt and its bolt hole, and It causes inconvenience that insertion becomes difficult.

In this case, it is conceivable to increase the gap between the bolt holes of the joining bolt in anticipation of such a positional deviation, but the size of the gap between the joining bolts is restricted by law, and such a measure is taken. Is impossible.

In view of such a conventional inconvenience, the present invention, as described above, preliminarily mounts the end of the beam to a vertical surface such as a pillar with a temporary bolt, and then uses a joining bolt for final tightening. An object of the present invention is to enable the joining bolt to be easily inserted into the bolt hole even when the beam is lowered due to its weight when being supported by the temporary bolt.

[0006]

In order to solve the above-mentioned problems, according to the present invention, when the vertical surface of the beam end and the vertical surface of the column side are joined by the joining bolts inserted between both vertical surfaces, What is characterized in that a temporary bolt is inserted between vertical surfaces and temporarily tightened, and a gap between the partial temporary bolt and the temporary bolt hole is smaller than a gap between the joint bolt and the bolt hole. It is a thing.

[0007]

As described above, since the gap between the temporary bolt holes is small, even if the beam descends due to its weight, the displacement of the bolt holes of the joining bolts is small, so Insertion is easy.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (1) In the drawings, (1) is a column made of rectangular steel pipe, and a bracket (3) obtained by cutting H-shaped steel into a short length is provided on the side surface of this column (1) so as to project laterally. It is firmly fixed. A vertical end plate (2) is fixed to the front end surface of the bracket (3), and three end plates (2) are provided on each side of the web (6) of the bracket (3). Bolt holes (4) (5)
However, they are opened at intervals above and below.

(7) is a beam made of H-shaped steel having the same cross-section as the bracket (3), and the tip of this beam (7) is
An end plate (8) having the same shape as the end plate (2) is pre-welded, and a bolt hole (4) formed in the end plate (2) of the bracket (3) is welded to the end plate (8). ) Corresponding to (5),
Bolt holes (9) and (10) are opened to fit in the same position.

Then, as shown in FIG. 1, the end plate (8) of the beam (7) is fitted to the end plate (2) on the side of the bracket (3), and the bolt holes (4) () which are mutually matched. The bolts (11) and (12) are respectively inserted into 5) and (9) and (10), and the nut (13) screwed to the opposite side is tightened to join them.

In the above-mentioned structure, the vertical 3
Middle bolt (12) of the bolts (11) (12)
Is a temporary bolt for temporarily tightening the beam (7) in advance. First, the temporary bolt (12) is inserted into the corresponding temporary bolt hole (10) (5) in the middle, and the nut ( 1
3) Screw it together and temporarily tighten it, then attach the beam (7) at each point.
After installing and adjusting the street with each installed, connect the connecting bolts (11) (11) to the upper and lower connecting bolt holes (9).
It is inserted into (4) to perform final tightening.

In such a structure, the clearance between the joining bolt (11) and its bolt hole (4) (9) is in accordance with the law, for example, if the diameter of the bolt (11) is 22 mm, this bolt hole ( 4) (9) 23.5mm, 1.5mm
Is formed so that a gap is created. On the other hand, temporary bolt holes (5) (10) for inserting the temporary bolts (12) in the center
If the provisional bolt (12) has the same diameter as the joining bolt (11), 22 mm, the diameter of the bolt hole (10) is 22.5 mm, which is 1 mm smaller than the joining bolt hole (4) by 0.5 m.
There is a gap of m.

Therefore, in the state where the temporary bolt (12) is inserted and the beam (7) is supported, even if the beam (7) is lowered downward due to its weight, the maximum beam is 0.5 mm.
Since the position is displaced only, the joining bolt (11) can be easily inserted into the joining bolt hole (4) which has a gap of 1.5 mm. The temporary bolt (12) is not considered as a member constituting the structure, and thus the clearance can be reduced without complying with the regulations.

[0014]

As described above, according to the present invention, by making the bolt hole of the temporary bolt smaller than the limit of the law, the beam is lowered by the weight and the position of the joining bolt hole is displaced. Even in such a case, the positional deviation is only within the clearance of the temporary bolt, so that the bolt can be easily inserted into the joint bolt hole having a larger clearance, and the workability is improved. The effect of being able to improve is obtained.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a main part of a beam joint portion showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view of an essential part of a beam joint portion.

[Explanation of symbols]

 (1) Pillar (2) End plate (4) Joining bolt hole (5) Temporary bolt hole (7) Beam (8) Beam end plate (9) Joining bolt hole (10) Temporary bolt hole (11) Joining Bolt (12) Temporary bolt

Claims (1)

[Claims] 1. When joining a vertical surface of a beam end and a vertical surface of a column with a joining bolt inserted between both vertical surfaces, a temporary bolt is also inserted between the vertical surfaces and temporarily tightened. A beam joining apparatus, wherein a gap between the part of the temporary bolt and the temporary bolt hole is smaller than a gap between the joining bolt and the bolt hole.