JP2896420B2 - Construction method of girder etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of erection of a girder or the like.

[0002]

2. Description of the Related Art First, a main girder is erected by a crane, and a frame scaffold is placed under the main girder from below. We work by assembling them or attaching hanging scaffolds to the main girder.

[0003]

When the framework scaffold is set up from below as described above, much labor and trouble are required for installation and disassembly. In addition, working at heights above the scaffolds is dangerous.

[0004] On the other hand, if the hanging scaffold is attached after the main girder is erected, the attaching work becomes a work at a high place, which also involves danger. On the other hand, there is also a folding type basket-shaped hanging scaffold called a sky stage or a sky hanger, which is attached to the main girder before installation and can be used after being installed. Is lower than the main girder, and there is a difference in the movement from the top of the main girder to the position, which is dangerous. In addition, the length of the work floor is generally short, and the work range is restricted, so that the efficiency is low.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned disadvantages of the prior art, to reduce the height difference from the main girder, and to easily install and remove a long scaffold such as a normal scaffold plate. It is an object of the present invention to provide a method of erection of a girder or the like which can perform work safely and quickly using such a scaffold.

[0006]

In order to achieve the above object, the present invention provides a vertical member between upper and lower flanges of a main girder,
The end of the scaffold is attached here, the main girder with the scaffold is erected, and the cross beam and the connecting material are installed or removed by using the scaffold. The gist of the present invention is that it can be freely folded so that it can be overhanging or vertical and can be accommodated between the upper and lower flanges.

According to the first aspect of the present invention, since the scaffold is provided between the upper and lower flanges of the main girder, the scaffold can be provided with almost no difference in height from the upper flange of the main girder. You can go in and out. Further, by increasing the distance between the vertical members between the upper and lower flanges of the main girder, a long plate such as a normal scaffold plate can be provided as a scaffold.

According to the second aspect of the present invention, in addition to the above-described operation, when the main girder is erected or the scaffold is not used, the scaffold is vertically set and stored between the upper and lower flanges of the main girder. There is no need to change the size of the opening between the girders without getting in the way.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a method of erection of a girder or the like according to the present invention, in which 1 is a main girder made of an H-shaped steel material comprising an upper flange 1a, a lower flange 1b, and a web 1c.

According to the present invention, as shown in FIGS.
The single pipe 2 is provided as a vertical member between the upper flange 1a and the lower flange 1b by welding the ends thereof so as to be spaced apart from each other. As another embodiment, an angle member may be used as a vertical member instead of the single tube 2.

Although there is often a vertical rib 3 between the upper flange 1a and the lower flange 1b, the vertical rib 3 can be used as a vertical member if the positional conditions are met.

A scaffold plate 4 is provided below a vertical member such as the single tube 2.
One of the left and right ends is axially attached, and the state is changed between a vertical state parallel to the web 1c and a horizontal state orthogonal to the web 1c by rotation. This scaffold plate 4 can use a scaffold plate as a cloth plate usually used for a frame scaffold.

Further, as a locking mechanism in a state of extending horizontally, as shown in FIGS. 2 and 3, a bent arm 5 is used as a hanging material, one end of which is a single tube 2 and the other end of which is a scaffold plate 4. The shaft was mounted on the side end opposite to the shaft mounted. The example of the locking mechanism of the bending arm 5 is merely an example, and a method of providing a metal support for the scaffold plate 4 in a horizontal state on the side of the main girder 1 may be adopted.

The main girder 1 with such a scaffold plate 4 is suspended by a crane or the like and installed. At this time, the scaffold plate 4 folds the bent arm 5 as shown in FIG. 3 and stores it between the upper flange 1a and the lower flange 1b in a vertical state.

After the main girder 1 is erected, the bending arm 5 is extended to make the scaffold plate 4 horizontal, and the horizontal girder and the connecting member are bridged between the main girder 1 using the overhanging scaffold plate 4. Is installed. Similarly, the scaffold 4 can be used when removing the cross beam and the joint.

The main girder 1 is erected on the upper flange 1a of the main girder 1 and the main line 6 is erected, and the main line 6 is stretched. Using this as a lifeline, the safety of work on the scaffold plate 4 is ensured, and the curing net 7 is extended. Sometimes.

[0017]

As described above, the method of erection of a girder or the like according to the present invention can provide a scaffold with a reduced height difference from the main girder, so that entry and exit between the main girder and the scaffold can be easily performed. You can do it.

Moreover, by providing a long scaffold such as a normal scaffold plate on the main girder before the erection, the scaffold can be easily installed and removed, and the work of installing the cross girder and the joining material can be performed by such a scaffold. And can be performed safely and quickly.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a method of erection of a girder or the like according to the present invention.

FIG. 2 is a side view of a main girder with a scaffold used in the method of the present invention when the scaffold is used.

FIG. 3 is a side view of the main girder with a scaffold used in the method of the present invention when the scaffold is not used.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Main girder 1a ... Upper flange 1b ... Lower flange 1c ... Web 2 ... Single pipe 3 ... Vertical rib 4 ... Scaffold plate 5 ... Bending arm 6 ... Parent line 7 ... Curing net

Claims (2)

(57) [Claims] 1. A vertical member is provided between upper and lower flanges of a main girder, an end of a scaffold is attached thereto, a main girder with the scaffold is erected, and a horizontal girder and a joint member are installed using the scaffold. Or a method of erection such as girders characterized by being removed. 2. The method of erection of a girder according to claim 1, wherein the scaffold is freely foldable so that an end portion thereof is pivotally mounted so that the end portion is axially extended or vertically inserted and fitted between upper and lower flanges.