JPH04146372A - Constructing method for frame - Google Patents

Abstract

PURPOSE:To reduce labor by a method wherein support columns supporting a work stand are made expandable and contractile, and the work stand is lifted, whenever the work for one story is finished, to an upper story with the support columns expanded upward and fixed to frames of the upper story. CONSTITUTION:A work trestle A is supported with a work stand 1 that is lifted up to a position of a beam B that is placed on the upper story side for which erection is finished, and with fixing columns 2a that are fixed with support legs 2c to a beam B placed on the lower story side of said story. Column' legs 2b are made capable of being housed completely into the fixing columns 2a. Column members and beam members are lifted up with lifts 5 and hoists 3 that are hung down from the work stand 1 and a roof 4. Movable scaffolds 1a are provided to the work stand 1 on places below the lifts 5 so that they can be stretched horizontal out of and retreated into the work stand freely. Thereby laborsaving execution can be made with automatic operation employed.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention is a method for assembling prefabricated members on-site to construct a frame such as a steel structure or precast concrete structure.
This relates to a method of constructing a frame.

[Problem to be solved by the invention]

The method of constructing a frame by assembling steel columns and beam members or precast concrete columns and beams on-site is usually done by installing the structure around the outer periphery of the building or on a pre-constructed slab, as shown in Figure 6. The columns and beams are lifted up using a lifting machine, and the columns and beams are assembled without scaffolding for assembly.
It is done in the same way as joining.

In this method, arm hoisting tower cranes and arm horizontal tower cranes are used as lifting machines, but the number of cranes used is reduced by using lanes with a large lifting radius. As a result, cranes have become larger and heavier, and in order to support the load, columns and beams must be reinforced, such as by inserting places into the frame as shown in the diagram, leading to increased costs. .

Furthermore, since scaffolding cannot be attached to pillars and beams until the assembly is completed, the assembly work of pillars and beams is carried out without scaffolding. This is extremely dangerous work, such as walking on the ground, and this has led to a serious shortage of workers.

In addition, the roof cannot be erected when constructing the column and beam structure, so in rainy weather the above work must be done on a wet steel frame.
Due to the increased risk, the work has to be stopped.

This invention takes into consideration the current state of conventional methods, and proposes a new method that not only reduces the cost of frame assembly, but also enables construction in all weather conditions, shortens the construction period, and improves safety. The aim is to propose a new method for achieving automation and labor saving in construction.

[Means to solve the problem]

In the present invention, the pillars that support the workbench serving as scaffolding are made telescopic, and each time the construction of one floor is completed, the supporter is extended to raise the workbench to the upper floor, and the supporter is fixed to the beam on the upper floor. At the same time, a heavy tower crane is not needed by attaching a lifting machine to the workbench or support that lifts column and beam members to a predetermined position. In addition to eliminating the need for reinforcement of columns and beams and reducing costs,
Assembling the beams using the workbench as a scaffold increases construction safety. Automated machines and robots are also installed on the workbench, and a series of construction tasks such as welding and bolt tightening when assembling columns and beams can be automated.

Additionally, a roof is built above the workbench to overcome the effects of weather and improve construction efficiency.

The work platform consists of a column located inside the four columns that constitute the smallest unit of the frame, a work platform constructed between the middle parts of the columns, a roof constructed between the tops of the columns, a work platform, Or, it consists of a lifting machine suspended from a column, and the column is erected above and below the workbench, and is connected to a fixed column that is supported by a beam on the lower floor, and is connected below and expands and contracts with respect to the fixed column. It is formed from flexible column bases.

To construct the frame, the fixed columns are supported by the already constructed beams on the lower floor, and the column and beam members on the upper floor are lifted and assembled. After assembly, the column bases are extended and the fixed columns and beams are supported. The work platform is raised, the fixed columns are supported by the beams on the upper floor, and the columns and beams are reassembled, and the process is repeated.

〔Example〕

The present invention will be explained below based on the drawings showing one embodiment.

As shown in FIG. 3, the present invention includes a workbench 1 for assembly work, a support column 2 supporting the workbench 1, and a lifting weight 113 attached thereto. This is a method of constructing a frame structure consisting of columns C and beams B made of steel or precast concrete using a work frame A consisting of a roof 4 covering the top of the work table 1.

The support columns 2 of the work platform A are basically located inside the four columns C that constitute the smallest unit of the structure, as shown in Figure 2, and the work platform 1 has a flat surface corresponding to the floor area of this minimum unit. The lifting machine 3 is installed suspended from the workbench 1 as shown in FIG.

A lifting machine 3 suspended from a workbench 1 is movable freely within a plane in a mole rail manner to facilitate work.

Pillar 2 is the beam B on the lower floor side that has already been erected as shown in Figure 3.
A fixed column 2a that rests on and is fixed to the fixed column 2a, and a column base 2b that is connected to the bottom and is expandable and retractable in the axial direction with respect to the fixed column 2a.
At the lower end of the fixed column 2a, there are supporting legs 2c, 2c that support the load of the work platform A on the beams B, 2c, in two directions on the beam B side, or in one direction, as shown in FIG. It is overhanging and protruding. These support legs 2c, 2c can be freely moved in and out from the fixed column 2a to avoid collision with the beams B and B on the upper floor when the workbench 1 is raised, or can be freely folded down by means of a hinge, or can be freely attached and detached. It is attached to the fixed column 2a.

The sections of Eii and Rollo in FIG. 2 show the planes of Eii and Rollo, respectively, in FIG.

The fixed pillar 2a has a length from the beam B on the lower side of the workbench 1 to the roof 4 through the workbench 1.

The column base 2b is retracted by being stored within the fixed column 2a as shown in FIG. At the lower end of this column base 2b, a support leg 2d is protruded to bear the load when the column base 2b is extended, that is, when the fixed column 2a is raised, so that it can be moved in and out, freely collapsed, or detached. There is.

FIG. 4 shows the state of support for the beams B and B when the column base 2b is retracted. FIG. 4 - ■ and ■ are views taken along the arrows in the X direction and X direction in FIG. 5, respectively.

When the column pedestal 2b is stored, the load of the work platform A is supported, for example, by the support 11t2c of the fixed column 2a and the support leg 2d of the column pedestal 2b, which is stored with its lower end exposed, as shown in the figure.

Figure 4 - m is 1. This is a modification example of (2), in which the column base 2b is completely stored inside the fixed column 2a, and the support leg 2d of the column base 2b is protruded from the notch formed at the lower end of the fixed column 2a, and the support leg 2d of the column base 2b is connected to the fixed column 2a. This is a case where the load of the work platform A is supported by the support legs 2c.

The column bases 2b are stored inside the fixed columns 2a when the column members and beam members are being erected, and after the construction of one layer of the frame is completed, they are extended to raise the fixed columns 2a and the workbench 1 and fix them. Pillar 2a
After fixation, it is deflated and stored.

The roof 4 is supported by fixed columns 2a continuous to the fixed columns 2a of the support columns 2 from the four corners of the workbench 1. The roof 4 has a larger planar area than the workbench 1, and its periphery overhangs the workbench 1 as shown.

By using a material that transmits light for the roof 4, the environment on the workbench 1 can be improved and work efficiency can be improved.

The lifting machine 3 is suspended not only from the workbench 2 but also from the roof 4 if necessary, and a lift 5 for lifting mainly pillar members or beam members is attached to the outer peripheral side of the pillar 2.

In this embodiment, as shown in FIG. 3, a movable scaffold 1a, which extends horizontally from the workbench 1 and is located below the lift 5, is accommodated so as to be freely accessible and accessible, thereby improving work efficiency.

Since the dimensions of the workbench 1 are variable due to the built-in movable scaffold 1a, the workbench A can be applied to structures with different planar areas per unit, so the conversion rate is high.
Cost reduction is possible. In addition, if the planar area of one unit is relatively smaller than that of work platform 1, work platform A
will be installed inside four pillars C corresponding to its scale.

As shown in FIGS. 1 and 2, the work platforms A are installed in each unit of one layer, and each unit ascends to the upper layer independently.

Here, the construction procedure for one layer will be explained with reference to FIGS. 1 and 2.

First, the work platform 1 is raised to the position of the beam B on the upper floor of the layer where construction has been completed, and then the fixed columns 2a are supported on the beams B and B on the lower floor as shown in the process on the left side of Fig. 1. The work platform A is supported by the beams B and B by fixing it with the legs 2c and 2c, and the column base 2
Store b.

At this stage, the column members and beam members are lifted using the lifting machine 3 and the lift 5 suspended from the workbench 1 and the roof 4, and their erection and connection are performed. During this time, the floor slab on the lower floor is constructed using the lifting machine 3 located at the bottom of the workbench 1.

Next, as shown in the process in the center of Figure 1, the column base 2b is extended and work is carried out with the load of the work platform A being borne by the beam B on the lower floor by the support leg 2d at the lower end of the column base 2b. Raise the base 1 and the fixed column 2a by one layer, and raise the support leg 2 from the fixed column 2a.
c is extended and fixed to the beam B on the upper floor and supported by this, and then the column base 2b is contracted and stored in the fixed column 2a as shown in the process on the right.

Subsequently, the process on the left side of FIG. 1 is repeated to proceed to the upper layer one by one.

〔Effect of the invention〕

This invention is as described above, and since the work frame is installed in each minimum unit of the frame, each unit is light in weight, does not require a large force to lift itself, and lifts column members and beam members. Since the lifting can be carried out close to the workbench, the lifting equipment attached to the pedestal requires relatively low capacity. Therefore, there is no need for a large tower crane like in the past, and there is no need to reinforce the frame, resulting in cost reduction.

In addition, all erection work for column and beam members is carried out on a workbench with an area equivalent to the floor area, making it highly safe.The area can also be used to install robots for bolting and welding, making construction easier. Automation is possible, and as a result, it is possible to save labor.

Furthermore, the roof of the work platform allows work to be carried out without being affected by the weather, which shortens the construction period and eliminates worker downtime due to rain, making construction more efficient. .

[Brief explanation of drawings]

Fig. 1 is an elevation view showing the construction procedure of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is an elevation view showing the work platform, and Fig. 4-
1 and II are elevational views showing details of the support leg part when the column base is stored, and are respectively views in the X direction and Y direction in FIG.
Figure 4 -■ is ■. FIG. 5 is a view taken along the Y direction in FIG. 5, showing a modification of (2), FIG. 5 is a partial plan view of FIG. 2, and FIG. 6 is an elevational view showing the conventional method. A...Work platform, 1...Work platform, 1a
・・・・・・Movable scaffold, 2・・・・・・ Support, 2a...
...Fixed column, 2b...Column base, 2c...
...Support leg, 2d...Support leg 1.3...
- Lifting machine, 4...Roof, 5...Lift, C...Column, B...Beam. Figure Figure Figure Anonymous Figure

Claims (1)

[Claims] (1) This is a method of assembling a frame consisting of columns and beams to the upper layer using a temporary work platform. , consists of a work platform constructed between the middle parts of the columns, a roof constructed between the tops of the columns, and a lifting machine suspended from the work platform or the columns, and the columns are supported by beams on the lower floor side. It consists of a fixed column and a column base that is connected below and is expandable and retractable with respect to the fixed column.With the fixed column supported by the already constructed beam on the lower floor, the column members and beam members on the upper floor are After assembly, the column base is extended to raise the fixed column and work platform, the fixed column is supported by the beam on the upper floor, and the column and beam members are assembled. A method of constructing a frame in which the frame is constructed repeatedly.