JPH0718246B2 - How to build a frame - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention assembles prefabricated members on site to construct a frame structure such as a steel frame structure or a precast concrete structure.
It relates to the construction method of the frame.

[Problems to be Solved by the Invention] A method of constructing a frame by assembling a steel frame column / beam member or a column / beam member made of precast concrete at the site is generally as shown in FIG. Alternatively, the hoisting machine installed on the constructed slab lifts the pillar / beam members, assembles and joins the pillars / beams without a scaffold for assembly, and the like.

In this method, arm hoisting tower cranes and arm horizontal tower cranes are used as hoisting machines, but the number of units used is reduced by using cranes with a large hoisting radius. As a result, the crane becomes large in size and heavy in weight, and it is necessary to reinforce the columns and beams, such as putting braces in the frame to support the load, which leads to an increase in cost. .

Also, since the scaffold cannot be attached to the pillar / beam until the assembly of the pillar / beam is completed, the pillar / beam assembling work is performed in the absence of the scaffold. It is very dangerous work such as walking around, which causes a serious shortage of workers.

In addition, since the roof cannot be erected when constructing the frame of columns and beams, the above work will be performed on the wet steel frame in case of rain, and the work will have to be stopped because the risk increases.

Based on the actual situation of the conventional method, the present invention not only reduces the cost of frame assembly but can be applied in all weathers, shortens the construction period, and at the same time proposes a method with improved safety. We will try to propose a new method to achieve the automation of construction and labor saving.

[Means for Solving the Problems]

In the present invention, the support pillars supporting the workbench serving as a scaffold are made flexible, and the support pillars are extended and the workbench is raised to the upper floor every time one layer of construction is completed, and the support pillars are fixed to the beams on the upper floor. By doing so, the workbench can be refilled by itself, and at the same time, a heavy tower crane is not required by attaching a lifting machine that hangs the column members and beam members to the workbench or columns and hangs them at a predetermined position. In addition to reducing the cost of the pillars and beams,
Improve the safety of construction by assembling the beams using the workbench as a scaffold. The workbench is also equipped with automated machines and robots, and it is possible to automatically perform a series of construction work such as welding work and bolt tightening work when assembling columns and beams.

In addition, by constructing a roof above the workbench, the effects of weather can be overcome and construction efficiency can be improved.

The work platform is a pillar located inside four pillars that form the smallest unit of the frame, a work platform installed between the middle parts of the columns, a roof installed between the tops of the columns, a work platform, Or, it consists of a lifting machine that is suspended from the pillar, and the pillar is erected on the upper and lower sides of the workbench, and it is connected to the fixed column supported by the beam on the lower floor and the column is expanded and contracted with respect to the fixed column. It is formed with a free column base.

The construction of the frame is carried out by hoisting the pillar members and beam members on the upper floor with the fixed columns supported by the beams on the lower floor that have already been built, and then assembling them. The workbench is raised, the fixed columns are supported by the beams on the upper floor, and then the columns and beams are assembled again, which is repeated.

〔Example〕

 The present invention will be described below with reference to the drawings illustrating an embodiment.

As shown in FIG. 3, the present invention is a work including a workbench 1 for assembling work, a support 2 for supporting the work, a lifting machine 3 attached to these, and a roof 4 covering the workbench 1. It is a method of constructing a frame structure composed of columns C and beams B of steel frame or precast concrete using the frame A.

As shown in FIG. 2, the columns 2 of the work platform A are basically located inside the four columns C that form the smallest unit of the frame, and the work platform 1 has a flat surface corresponding to the floor area of the smallest unit. It has an area, and the lifting machine 3 is installed so as to be suspended from the workbench 1 as shown in FIG.

The hoisting machine 3 suspended from the workbench 1 is freely movable in a plane in a monorail system for smooth work.

The column 2 is a beam B on the lower floor side, which has already been installed as shown in FIG.
It is composed of a fixed column 2a that is mounted on the fixed column 2a and is fixed to the fixed column 2a, and a column base 2b that is connected to the fixed column 2a and is expandable and contractible in the axial direction with respect to the fixed column 2a. As shown in the figure, the supporting legs 2c, 2c for supporting the load of the work platform A on the beams B, B are the beams B.
It is projected so as to project in two directions or one direction. The support legs 2c, 2c can be freely moved in and out of the fixed column 2a in order to avoid collision with the beams B, B on the upper floor when the workbench 1 is raised, or can be retracted by a hinge or can be detachably attached to the fixed column 2a. Obsessed with.

The EE and ROLL sections in Fig. 2 are respectively EE in Fig. 1.
B, shows the plane of ro-ro.

The fixed pillar 2a has a length from the beam B below the workbench 1 to the roof 4 through the workbench 1.

The column base 2b contracts by being stored in the fixed column 2a as shown in FIG. At the bottom of this column base 2b, when it extends,
That is, the support leg 2d for bearing the load when the fixed column 2a rises is provided so as to be able to move in and out, fold, or be detachable similarly to that of the fixed column 2a.

FIG. 4 shows a state of supporting the beams B, B when the column base 2b is stored. FIGS. 4-I and II are arrow views in the X direction and the Y direction of FIG. 5, respectively.

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

Fig. 4-III shows a modified example of I and III, in which the column base 2b is fixed to the fixed column 2a.
The support leg 2d of the column base 2b was projected from the notch formed at the lower end of the fixed column 2a, and the load of the work platform A was supported by this and the support leg 2c of the fixed leg 2a. This is the case.

The column base 2b is stored in the fixed column 2a when the column member and the beam member are erected. After the erection of the frame for one layer is completed, the column pedestal 2b is extended and the fixed column 2a and the workbench 1 are lifted and fixed. After the pillar 2a is fixed, it is contracted and stored.

The roof 4 is supported by fixed columns 2a which are continuous from the four corners of the workbench 1 to the fixed columns 2a of the column 2. The roof 4 has a plane area larger than that of the workbench 1, and the periphery thereof projects from the workbench 1 as illustrated.

By using a light-transmitting material for the roofing material of the roof 4, the environment on the workbench 1 can be improved and workability can be improved.

The hoisting machine 3 is suspended from the roof 4 in addition to the workbench 2 if necessary, and a lift 5 for hoisting mainly pillar members or beam members can be attached to the outer peripheral side of the pillar 2.

In the embodiment, as shown in FIG. 3, the work platform 1 is extended horizontally from here, and the movable scaffold 1a located below the lift 5 is housed so that it can be freely moved in and out to improve workability.

Since the size of the workbench 1 can be changed by incorporating the movable scaffold 1a, that is, the workbench A can be applied to frames having different flat areas of 1 unit, so that the conversion rate is high and the cost can be reduced. Is. When the flat area of one unit is relatively smaller than that of the work table 1, the work table A is installed inside the four pillars C corresponding to the scale.

The work platform A is installed for each unit of one layer as shown in FIGS. 1 and 2, and is independently raised to the upper layer.

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

First, after raising the workbench 1 to the position of the beam B on the upper floor of the layer in which the construction has been completed, the fixed columns 2a are supported by the beams B and B on the lower floor as shown in the process on the left side of FIG. The work base A is supported by the beams B and B while being fixed by the legs 2c and 2c, and the column base 2b is stored.

At this stage, the column member and the beam member are hoisted using the hoisting machine 3 and the lift 5 suspended from the workbench 1 and the roof 4, and the erection and connection thereof are performed. During this period, the floor slab on the lower floor is constructed by the lifting machine 3 below the workbench 1.

Next, as shown in the center step of FIG. 1, the work is performed by extending the column base 2b while the beam B on the lower floor is loaded with the load of the work platform A by the supporting leg 2d at the lower end of the column base 2b. The platform 1 and the fixed column 2a are raised by one layer, and the supporting leg 2c is projected from the fixed column 2a and fixed to the beam B on the upper floor, and after being supported by this, the column as shown in the process on the right side. The leg 2b is contracted and stored in the fixed column 2a.

Subsequently, the process on the left side of FIG. 1 is repeated to sequentially advance to the upper layer.

〔The invention's effect〕

The present invention is as described above. Since the work platform is installed for each minimum unit of the frame, the weight of one unit is light, and it does not require a large force to raise itself, and the column members and beam members are not lifted. Since the weight can be approached to the workbench, the lifting machine attached to the trestle has a relatively low capacity. For this reason, a large tower crane as in the past is not necessary, and it is not necessary to reinforce the frame, so that the cost can be reduced.

In addition, since the work of erection of pillar members and beam members is all performed on a workbench having an area equivalent to the floor area, it is highly safe and it is possible to install robots for bolting and welding using that area. Automation is possible, and as a result, labor saving can be achieved.

Furthermore, because the roof of the work platform allows the work to be performed without being affected by the weather, the construction period can be shortened, and at the same time, the workers will not be stopped due to the rain and the construction efficiency will be improved. .

[Brief description 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 a work platform, and FIG.
I and II are elevation views showing the details of the supporting leg portion when the column base is stored, respectively, and are the arrow views in the X direction and the Y direction of FIG. 5, respectively. 5 is a view in the direction of the arrow Y in FIG. 5, FIG. 5 is a partial plan view of FIG. 2, and FIG. 6 is an elevation view showing a conventional method. A ... Work platform, 1 ... Work platform, 1a ... Movable scaffolding, 2 ...
… Posts, 2a …… fixed columns, 2b …… posts, 2c …… supporting legs, 2d
…… Support legs, 3 …… Hoisting machine, 4 …… Roof, 5 …… Lift, C …… Pillar, B …… Beam.

Claims (1)

[Claims] 1. A method of assembling a frame composed of columns and beams to an upper layer using a temporary work platform, wherein the work platform is located inside four columns which form the smallest unit of the frame in plan view. It consists of columns, a work platform installed between the middle parts of the columns, a roof installed between the tops of the columns, and a work platform, or a lifting machine suspended from the columns. The columns are beams on the lower floor. It consists of a fixed column to be supported and a column base that is connected to the fixed column and is expandable and contractible with respect to the fixed column. It is said that the beam members are lifted up and assembled, and after the assembly, the column bases are extended to raise the fixed columns and the work table, the fixed columns are supported by the beams on the upper floor, and the column members and the beam members are assembled. How to construct a frame by repeating the procedure.