JP2833429B2 - Beam positioning method for beam-column joints - Google Patents

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 which corrects a displacement in arranging a beam between existing columns so that the beam can be accurately set at a predetermined position.

[0002]

2. Description of the Related Art In order to join a steel beam between existing columns, a steel beam is generally hung by a lifting device such as a crane and inserted between the columns by lateral movement, and the beam is inserted into a gusset plate projecting from the column. Contact the end side of the steel beam web,
Bolts are inserted into the bolt holes formed on both sides, and the nuts are tightened to complete the joining.

[0003]

However, in this joint structure, the steel beam can be inserted with the difference in the length of the steel beam relative to the distance between the columns as clearance, but the beam is slightly displaced because the clearance is small. And the end contacted one of the pillars, did not fit well between the pillars, and even if it did, it could not be accurately set at a predetermined position.

[0004] For this purpose, for example, there is a method in which a steel beam is suspended through a mechanical correction device and inserted into a column while finely adjusting the length in the longitudinal direction. However, it is mechanically complicated and large-scale. A lot of time is required for the fine adjustment, and there is a problem that it takes more time than the adjustment time by a skilled worker.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a column-beam which can be guided between columns without requiring fine adjustment in a final stage of inserting the steel beam between the columns. The present invention provides a method for joining beams in the joint structure.

[0006]

In order to achieve the above object, according to the present invention, a steel beam made of an H-shaped steel is inserted between existing columns by lateral movement, and the gusset plate protruding from the columns is inserted into the gusset plate. In a joint structure of a column and a beam in which end portions of a web of a steel beam are brought into contact with each other and connected to each other, a tip of a rotating surface is provided at an end of a flange of the steel beam by an amount corresponding to a design clearance between the column and the steel beam. A protruding positioning guide roller is detachably fixed.

[0007]

When the beam is slightly displaced during the lateral movement between the columns, the rotating surface of the guide roller first comes into contact with the inside corner of one of the columns. When the guide roller is further laterally moved in this state, the rotating surface of the guide roller rotates and corrects the movement of the steel beam in the longitudinal direction according to its diameter, and inserts the steel beam into a predetermined position between the columns, and the end side of the web. To 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 is used for joining other steel beams.

[0008]

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

FIG. 1 is a perspective view showing a method of joining beams 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. FIG.

In the figure, a pillar 1 has a rectangular cross section,
A gusset plate 2 having an inner hollow steel column and having a large number of bolt holes 2a formed on the side thereof is integrally formed with the gusset plate 2.

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 webs 3a at both ends (only one end is shown in the figure). A guide roller 4 for positioning is detachably attached to an edge of the inner upper flange 3c of the upper and lower flanges 3c.

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

Prior to the joining operation of the steel beam 3 to the column 1, the guide roller 4 separates the column 1 from the edge of the flange 3c.
The flange 3c is attached to an edge on the leading side in the moving direction of the flange 3c with a projection amount corresponding to a clearance d between the steel beam 3 and the steel beam 3.

In the above configuration, to join the steel beam 3 between the columns 1, the steel beam 3 is suspended horizontally via a wire by a crane (not shown), and the steel beam 3 is moved sideways as indicated by the arrow in FIG. The gusset plate 2 is moved to stop the movement when one side surface of both ends of the web 3 a comes into contact with the gusset plate 2.

At this time, when the steel beam 3 is accurately positioned between the columns 1, the tip rotating surface of the guide roller 4 is in contact with the inside of the column 1, and in this state, the guide roller 4 is rotated while rotating between the columns 1. Can be inserted.

Further, even if the steel beam 3 is displaced in the longitudinal direction, the inner corner of the column 1 contacts at least the outside of the rotation radius of one guide roller 4 as shown in FIG. If the guide roller 4 is further laterally moved in this state, the rotating surface of the guide roller 4 rotates while rotating according to the diameter thereof as shown in FIG.
As shown in FIG. 3, the steel beam 3 is moved and corrected in the longitudinal direction, and 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 end side surface of the web 3 a 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 coincide with each other. Therefore, a bolt (not shown) is inserted here, and the column 1 and the beam 3 are joined by tightening a nut. After joining is completed, the guide roller 4 is removed by loosening the mounting bolt 7, and the guide roller 4 is diverted for joining other steel beams.

If the inner corner of the column 1 is in contact with the inside of the radius of rotation of the guide roller 4, the column cannot move laterally in this state. Until the steel beam 3
May be corrected and moved in the longitudinal direction.

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

[0020]

As described in detail in the above embodiment, in the method of positioning a beam in the beam-column joint structure according to the present invention, if the beam is slightly displaced during the lateral movement between the columns, first, the guide When the rotating surface of the roller abuts on the inner corner of one of the pillars and is further laterally moved in this state, the rotating surface of the guide roller rotates and corrects the movement of the steel beam in the longitudinal direction according to the diameter of the rotating roller. Can be inserted into the predetermined position, the steel beam can be guided between the columns without requiring fine adjustment in the final stage of inserting the steel beam between the columns, and the work can be completed in a short time.

In addition, the method of the present invention does not require a complicated and large-scale device, and has the advantages that the guide roller can be attached and detached for each operation and diverted.

[Brief description of the drawings]

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

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

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

[Explanation of symbols]

 Reference Signs List 1 steel column 2 gusset plate 3 steel beam 3a web 3c flange 4 guide roller d clearance

Claims (1)

(57) [Claims] 1. A steel beam made of H-shaped steel is inserted between existing columns by lateral movement, and a gusset plate projecting from the column is brought into contact with an end side surface of a web of the steel beam so as to be connected. In the joint structure of a column and a beam, a guide roller for positioning, in which a tip of a rotating surface projects by a design clearance of the column and the beam, is detachably fixed to an end of a flange of the steel beam. A beam positioning method in a column-beam joint structure, characterized in that: