JPH0762886A - Beam alignment method under post/beam joint structure - Google Patents

Abstract

PURPOSE:To reduce working time by removably fixing an alignment guide roller with the end of a flange of an iron steel beam where the tip of a rotary surface of the guide roller projects by a designed clearance between a steel post and a steel beam. CONSTITUTION:A steel beam 3 is horizontally hoisted by way of a crane wire and moved sideways so that one side surface on both ends of a web 3a may be brought into contact with a gusset plate 2, which ends the movement of the steel beam. When the steel beam 3 is accurately aligned between the posts 1, the rotary surface at the tip of the guide roller 4 comes in contact with the inner surface of the posts 1 and it is inserted between the posts 1 while rotating the guide roller in this state. Even when the steel beam 3 is deviated in the longitudinal direction, if the inside corners of the posts 1 come in contact with the outside of the guide roller 4 at a rotary radius on one side, the steel beam is further moved sideways. Then, while rotating, the rotary surface of the guide roller 4 revises the movement of the steel beam 3 in the longitudinal direction in conformity with its size, thereby inserting accurately the steel beam 3 between the posts 1 with a clearance (d) provided at a specified position and placing the side surface on the end of the web 3a in contact with the gusset plate 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a beam positioning method in a beam-column joint structure capable of correcting misalignment in arranging beams between existing columns so that they can be accurately set at a predetermined position.

[0002]

2. Description of the Related Art Generally, in order to join steel beams between existing columns, the steel beams are generally hung by a lifting device such as a crane and laterally moved to be inserted between the columns. Contact the end side of the steel beam web,
The bolts are inserted through the bolt holes formed in both and the nuts are tightened to complete the joining.

[0003]

However, in this joint structure, the steel beam can be inserted by using the difference in the length of the steel beam with respect to the distance between the columns as a clearance. However, since this clearance is small, the beam is slightly displaced. And the end part hit one pillar, it did not enter between the pillars well, and even if it entered, it could not be set accurately in the predetermined position.

For this purpose, for example, there is a method of suspending a steel beam through a mechanical correction device and inserting it into the columns while finely adjusting it in the longitudinal direction, but it is mechanically complicated and large-scale, and A lot of time was taken for the fine adjustment, and there was a problem that it took longer than the adjustment time by a highly skilled worker.

The present invention has been made to solve the above problems, and an object thereof is to provide a column beam that can be guided between columns without requiring fine adjustment at the final stage of inserting the steel beam between columns. The present invention provides a method for joining beams in a joint structure as described above.

[0006]

In order to achieve the above-mentioned object, according to the present invention, a steel frame beam made of H-shaped steel is laterally inserted between existing columns, and the gusset plates projecting from the columns are provided with the above-mentioned structure. In a beam-column joint structure in which the end side surfaces of the steel beam webs are brought into contact with each other to connect the ends of the flanges of the steel beam to the end of the rotating surface by the design clearance between the column and the steel beam. The projecting guide roller for positioning is detachably fixed.

[0007]

If the beam shifts slightly during lateral movement between the columns, the rotating surface of the guide roller first comes into contact with the inner corner of one of the columns. If the guide roller is further moved horizontally in this state, the rotation surface of the guide roller rotates and the steel beam is moved in the longitudinal direction according to the diameter of the guide roller, and the steel beam is inserted at a predetermined position between the columns. Touch the gusset plate. At this stage, the bolts are inserted into the bolt holes formed in the web and the gusset plate, and the nuts are tightened to join the columns and beams. After the joining is completed, the guide roller is removed and diverted to joining other steel beams.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a perspective view showing a beam joining method according to the present invention, FIG. 2 is a partially enlarged view showing a mounting structure of a guide roller used in the method, and FIG. 3 is a partial plan view showing a joining procedure in the method. It is a figure.

In the figure, a pillar 1 has a rectangular cross section,
A gusset plate 2 which is an internal hollow steel frame column and on which a large number of bolt holes 2a are formed is integrally projected on its side portion.

The steel beam 3 is made of H-shaped steel, and a plurality of bolt holes 3b corresponding to the bolt holes 2a are formed in the webs 3a at both ends (only one end side is shown in the drawing) of the web 3a. Positioning guide rollers 4 are removably attached to the edges of the inner and upper flanges 3c of the upper and lower flanges 3c.

The guide roller 4 is rotatably supported by a bracket 5 via a rotary shaft 6, and the bracket 5
Is integrally provided at the upper tip of a pair of U-shaped clamp tools 8 which are detachably fixed to the edge of the flange 3a through clamp bolts 7.

This guide roller 4 is attached to the pillar 1 from the edge of the flange 3c prior to the work of joining the steel frame beam 3 to the pillar 1.
The flange 3c is attached to the edge of the flange 3c on the advance side in the moving direction with a protrusion amount corresponding to the clearance d between the steel frame beam 3 and the steel frame beam 3.

In the structure described above, in order to join the steel beam 3 between the columns 1, the steel beam 3 is hung horizontally through a wire on a crane (not shown), and the steel beam 3 is horizontally moved as shown by the arrow in FIG. The gusset plate 2 is moved, and both sides of the web 3a come into contact with the gusset plate 2 to stop the movement.

At this time, when the steel beam 3 is accurately positioned between the pillars 1, the tip rotation surface of the guide roller 4 contacts the inside of the pillar 1, and in this state, the guide roller 4 is rotated and the distance between the pillars 1 is increased. Can be inserted into.

Even if the steel beam 3 is displaced in the longitudinal direction, the inner corner of the column 1 is in contact with the outer side of the radius of rotation of one guide roller 4 as shown in FIG. 3 (a). If it is further moved laterally in this state, the rotation surface of the guide roller 4 rotates while the rotation surface of the guide roller 4 changes depending on the diameter of the rotation surface of FIG.
As shown in FIG. 3, the steel beam 3 is moved and corrected in the longitudinal direction so that the steel beam 3 is accurately inserted by providing a clearance d at a predetermined position between the columns 1, and finally as shown in FIG. The edge side surface of the web 3a is brought into contact with the gusset plate 2.

At this stage, the web 3a and the bolt holes 2a and 3b opened in the gusset plate 2 are aligned with each other. Therefore, a bolt (not shown) is inserted here, and the nut 1 is tightened to join the column 1 and the beam 3 together. After the joining is completed, by loosening the mounting bolt 7, the guide roller 4 is removed and diverted to joining another steel beam.

If the inner corner of the column 1 is in contact with the inside of the radius of rotation of the guide roller 4, it is not possible to move laterally in this state, and the crane is operated so that it is in contact with the outside of the radius of rotation of the guide roller 4. Until steel beam 3
Should be corrected and moved in the longitudinal direction.

Although the guide roller 4 is fixed to the leading edge of the upper flange 3c in the moving direction in the above embodiment, it may be fixed to the lower flange 3c or to both. You can also do it.

[0020]

As described above in detail with reference to the embodiments, in the beam positioning method in the beam-column joint structure according to the present invention, if the beams are slightly displaced during lateral movement between the columns, the guide is first provided. When the rotation surface of the roller abuts on the inner corner of one of the columns and is further moved laterally in this state, the rotation surface of the guide roller rotates while the steel beam is moved in the longitudinal direction according to its diameter to correct the gap between the columns. Since it can be inserted in a predetermined position, the steel frame beam can be guided between columns without requiring fine adjustment in the final stage of inserting the beam between columns, and the work can be completed in a short time.

Further, the method of the present invention does not require a complicated and large-scale device, and has an advantage that the guide roller can be detached for each work and diverted.

[Brief description of drawings]

FIG. 1 is a perspective view showing a beam joining method according to the present invention.

FIG. 2 is a partially enlarged view showing a mounting structure of a guide roller used in the method.

3A to 3C are partial plan views showing a joining procedure in the same method.

[Explanation of symbols]

 1 Steel column 2 Gusset plate 3 Steel beam 3a Web 3c Flange 4 Guide roller d Clearance

Claims (1)

[Claims] 1. A steel frame beam made of an H-shaped steel is laterally inserted between existing columns, and a gusset plate projecting from the column is brought into contact with an end side surface of a web of the steel frame beam to connect them. In the joint structure of the column and the beam, the guide roller for positioning is detachably fixed to the end of the flange of the steel frame beam so that the tip of the rotating surface protrudes by the design clearance between the column and the steel frame beam. A beam positioning method in a beam-column joint structure characterized by the above.