JP3080203B2 - Construction method of suspension scaffolding in steel frame construction - 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 for constructing a suspension scaffold in a steel frame.

[0002]

2. Description of the Related Art Steel frame construction involves a procedure of giving priority to frame construction of columns and girders. That is, first, only the column steel frame and the girder steel frame are erected first, and then the small beam frame left on the girder frame grid surface is erected. This small beam frame construction is performed with a suspension scaffold (with safety net) installed on the grid. The installation of the conventional suspension scaffold must be assembled at the site because it is impossible to lift the timber scaffolding because the pillar steel beam and the girder steel frame are pre-constructed as described above. In other words, a hanging chain is hung over a steel girder, a single tube of scaffolding frame material is hung over hooks at both ends of the chain to form a frame in the air, and a net and a scaffold plate are laid on this frame. I do. In addition, the payment is performed in a reverse procedure, and under the state of being suspended by the chain,
Scaffolds, nets, and single tubes are then dismantled.

[0003]

In the above-described conventional method of constructing a hanging scaffold, there is too much dangerous work without providing a safe working scaffold. That is, the hanging and attaching of the hanging chain on the girder, the hanging of the single pipe to the hooks at both ends of the chain after the body is protruded from the girder, and the connection of the single pipe intersection, the net and the scaffold on this single pipe Laying of a board, etc., which also accompany the payment in the reverse order. In addition, the suspension of the above-mentioned suspension chain to the girder may cause irregular suspension if the suspension posture is poor.
It takes time and effort. The present invention has been made in view of the above-mentioned problems of the related art, and an object of the present invention is to make it possible to perform work under the provision of a safe scaffold, thereby achieving safety and The present invention aims to provide a method for constructing a suspended scaffold in a steel frame erection which can be simplified, and thus laborsaving.

[0004]

In order to achieve the above object, a construction method according to the present invention comprises a dividing unit having a size capable of suspending a suspension scaffold (with a safety net) large enough to cover a girder frame grid. The unit is grounded, and a predetermined suspension chain that has been passed through a steel-framed mounting bracket is attached to this unit, and workers are suspended during the suspension of this unit immediately after the completion of the girder frame. Transfer and attach the hardware to the lower flange of the girder steel frame to install each unit, and pay for each unit by passing the rope fixed to the unit through the hardware and placing concrete on the lower floor. Remove the hardware while supporting it on the slab worker, and then lower the unit on the lower slab by pulling out the rope of the lower worker, and disassemble. Those were suppose.

[0005]

The divided units forming the suspension scaffold are grounded, so that there is no danger in forming the suspension scaffold. The erected units are suspended before the upper-floor pillars and girders are built, so that they can be lifted and carried.
The worker who has transferred to the unit under the lifting support completes the installation by attaching the steel-frame mounting suspension to the lower flange of the girder under a comfortable posture. As described above, the installation of the suspended scaffolding in front of the upper floor pillars and the girders frame construction means that the fall curing net was installed, so the steel frame construction which was not allowed until now The lower part of the work can be done, which greatly accelerates the construction. The removal of the unit, with the support of the rope, removes the hardware and lowers it on the lower slab, where it is dismantled, so that it can be done completely safely and quickly. Due to the fact that the grid is often the same, the units to be laid are often of the same shape, and laying work can be performed rationally.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described with reference to FIGS. 1 to 6. A unit 1 in which a suspension scaffold (with a safety net 11) large enough to cover a girder frame grid is divided into a size that can be suspended. , The suspension chains 2,... Are assembled. The chain is hung in advance on the steel-frame-mounted hanging hardware 3,. The hanging hardware 3 is shown in detail in FIG. 6, and a fastening bolt 3b is attached to a top plate of a base 3a having a U-shaped cross section, and a hanging ring 3c is hung on a bottom plate.
The base 3a is fitted into an H-shaped steel flange as shown in the figure and assembled by tightening the fastening bolts 3b. A chain 4 and the like are passed through the ring 3c. When the frame of the girder 5 is completed, the unit 1 is connected via the tow truck 6.
Is suspended in the girder frame grid, the worker 7 on the girder 5 moves onto the unit 1 and attaches the hanging hardware 3 to the lower flange of the girder 5 (FIGS. 1 and 2). At this time, since the length of the hanging chain 2 is selected in accordance with the type of the girder to be mounted in the groundwork, irregular hanging does not occur. When the unit 1 is completely covered with the grid, the beams 8 are suspended on the scaffold (FIG. 3). Next, the final tightening is performed (FIG. 4). In the wiping, the rope 9 is fixed to the unit 1, the other end is supported by the worker 7 on the lower slab 10, the hanging metal 3 is removed under the support of the worker 7, and then the rope 9 is removed. Lower slowly by the feeding operation (Fig. 5). Demolition is Slab 1
You can do it safely on 0.

[0007]

Since the present invention is configured as described above, it has the following effects. Not only does the assembling and dismantling of the scaffolding be greatly simplified and made safer, but the work process was not completed until the completion of the steel frame construction, and other processes were not carried out until the suspension scaffolding prevention prevention curing was completed. It is possible to set up a reasonable process without waste because it is allowed. Further, the conventional suspension chain, which has been hindered by a deck plate or the like wrapped around a girder and placed on the upper surface, is advantageous in the present invention since such inconvenience is solved.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a procedure of the construction method of the present invention.

FIG. 2 is an explanatory view of a procedure of the construction method of the present invention.

FIG. 3 is an explanatory view of a procedure of the construction method of the present invention.

FIG. 4 is an explanatory view of a procedure of the construction method of the present invention.

FIG. 5 is an explanatory view of a procedure of the construction method of the present invention.

FIG. 6 is an explanatory view of how to use a hanging metal employed by the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Unit 2 Suspension chain 3 Steel frame mounting base 3a Base 3a Fastening bolt 3b Fastening bolt 3b Hanging ring 3c Hanging ring 3c 4 Chain 5 Large beam 6 Wrecker 7 Worker 8 Small beam 9 Rope 10 Lower floor slab 11 Safety Net

Continuation of the front page (56) References JP-A-4-59238 (JP, U) JP-A-2-58547 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E04G 3 / Ten

Claims (1)

(57) [Claims] 1. A split scaffold (with a safety net) large enough to cover a girder frame grit is constituted by a divided unit which can be hung, and the unit is ground-structured and has a cross section having a cross section. Take the fastening bolts on the top plate
Attached with a ring through the bottom plate
Then, after fitting into the flange of the H-shaped steel,
Assemble the specified suspension chain that has been passed through the steel mounting suspension that was assembled by tightening the girder, and transfer the workers during the suspension of this unit immediately after the completion of the girder frame Each unit is installed by attaching the hardware to the lower flange of the girder steel frame, and each unit is laid out by hanging a rope fixed to the unit through the hardware and working on the concrete slab on the lower floor. The hardware is removed in a state where it is supported by a worker, and after that, the unit is lowered onto the lower slab by pulling out the rope of the lower floor worker, and disassembled. Construction method of suspension scaffolding in steel frame construction.