JP2833430B2 - Beam holding structure in column-beam installation structure - 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 holding structure in a column-beam installation structure in which a beam is arranged between existing columns, and the beam can be temporarily installed before connecting and fixing.

[0002]

2. Description of the Related Art In order to install a steel beam on an existing column having a gusset plate made of only webs, the steel beam is generally inserted between the columns by lateral movement while suspending the steel beam by a lifting device such as a crane. The end surface of the web of the steel beam is brought into contact with the projecting gusset plate, a bolt is inserted into a bolt hole formed in both, and a nut is tightened or the two are welded to complete the joining.

[0003]

However, in this installation structure, since the side surface of the web is only in contact with one side surface of the gusset plate, if the load of the steel beam is deposited on the gusset plate as it is, the upper flange will not work. The load is deposited with the gusset plate in contact with the lower edge, especially in the case of the bolted joint method, where there are problems such as the two bolt holes being shifted up and down, and the load is unevenly distributed due to the contact on one side. However, since a rotational moment in the falling direction is generated on the steel beam, the beam cannot be temporarily installed until the beam is completely fixed to the gusset plate.

Therefore, in this type of installation structure, it is impossible to remove the sling of the crane until the fixing by bolts or nuts or welding is completed, which causes a decrease in the operating rate of the crane.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to temporarily fix a steel beam to a column having a gusset plate of only this type of web and to operate a crane. An object of the present invention is to provide a beam holding structure in a column-beam installation structure capable of improving the efficiency.

[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 the installation structure of a beam and column in which the end side surfaces of the web of the steel beam are brought into contact with each other and connected, a temporary receiving piece for positioning having the same thickness as the gusset plate is provided at the end of one side surface of the web. In addition to being integrally fixed, a hook-shaped metal fitting is provided integrally on the front surface of the temporary receiving piece, which is vertically installed downward and serves as a retaining guide.

[0007]

According to the above construction, when the steel beam is lowered with the lower inner side of the hook-shaped metal fitting positioned at the upper part of the gusset plate, the temporary receiving piece comes into contact with the upper part of the gusset plate, and the temporary receiving piece is brought into contact with the temporary receiving piece. The load can be deposited on the gusset plate through the through hole, and the rotation moment of the steel beam due to the contact of one side can be stopped by the hook-shaped bracket.

[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 steel beam holding structure according to the present invention, and FIG. 2 is a sectional view of the same.

In the figure, an existing column 1 is a steel column having a rectangular cross section and a hollow inside, and a gusset plate 2 having a large number of bolt holes 2a formed on one side thereof. I have.

The steel beam 3 has flanges 3 above and below a web 3a.
b made of H-section steel, and its web 3a
At both ends (only one end is shown in the figure), a large number of bolt holes 3c corresponding to the bolt holes 2a of the gusset plate 2 are formed, and on one side of the web 3a, A temporary receiving piece 4 having the same thickness as that of the gusset plate 2 is integrally fixed by welding, and a hook-shaped metal fitting 5 is provided on the front surface of the temporary receiving piece 4 and vertically protruded downward by welding or the like. Has been established.

The temporary receiving piece 4 is for positioning the steel beam 3 with respect to the gusset plate 2,
With the upper edge of the gusset plate 2 aligned with the lower portion of the temporary receiving piece 4, the heights of the bolt holes 2a and 3c of the two coincide.

The hook-shaped metal fitting 5 is used as an installation guide and also for retaining. A tapered inclined surface 5a is formed on the inside from the lower part of the temporary receiving piece 4 to the outside.

In order to install the steel beam 3 having the above configuration between the columns 1, the steel beam 3 is horizontally suspended via a wire by a crane (not shown), and the steel beam 3 is mounted as shown by the arrow in FIG. The web 3a is moved laterally, and the movement is stopped by bringing both ends of one side of the web 3a into contact with the gusset plate 2.

Next, when the steel beam 3 is lowered, the lower edge of the temporary receiving piece 4 abuts on the upper portion of the gusset plate 4, and
The load of the steel beam 3 is deposited on the gusset plate 2 through the temporary receiving piece 4. In addition, as shown by the imaginary line in FIG. 2, the gusset plate 2
Even if it is slightly separated or descends in a state where it is not completely joined, it is guided to the temporary receiving piece 4 along the inner inclined surface 5a of the hook-shaped metal member 5.

If the steel beam 3 is moved and adjusted in the longitudinal direction in a state where the load is kept, the bolt holes 2a and 3c completely coincide with each other, and at this point, the sling of the crane can be removed.

In the temporary receiving state of the steel beam 3, a rotational moment is generated on the opposite side of the temporary receiving piece 4 due to the uneven distribution of the load. However, the hook-shaped metal fitting 5 can be stopped by sandwiching the gusset plate 2 and temporarily installed. Safety at the time can be ensured.

[0017]

As described in detail in the above embodiments, in the beam holding structure in the column and beam installation structure according to the present invention, the lower inner side of the hook-shaped metal fitting is located above the gusset plate. If the steel beam is lowered in this state, the temporary receiving piece contacts the upper part of the gusset plate, the load can be deposited on the gusset plate through this temporary receiving piece, and the rotational moment of the steel beam due to the contact of one side is further reduced. Since it can be stopped by hook-shaped brackets, beams can be temporarily installed while maintaining the safety between the existing columns with gusset plates of this type and the beams can be fixed until they are connected and fixed, and the operating rate of the crane is also improved it can.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an installation structure of a steel beam according to the present invention.

FIG. 2 is a sectional view of the same.

[Explanation of symbols]

 Reference Signs List 1 steel column 2 gusset plate 3 steel beam 3a web 4 temporary receiving plate 5 hook-shaped metal fitting

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 pillar and beam installation structure, a temporary receiving piece for positioning having the same thickness as the gusset plate is integrally fixed to an end of one side surface of the web, and is attached to a front surface of the temporary receiving piece. Is a beam holding structure in a column-beam installation structure, wherein an installation guide and a hook-shaped metal fitting for retaining are vertically provided downward.