JPH0718252B2 - Construction work platform for 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 an erection work platform for constructing a framing structure in which prefabricated members are assembled on site to construct a framing structure such as a steel frame structure or a precast concrete structure.

[0002]

The method of constructing a frame by assembling steel-made pillar / beam members or precast concrete pillar / beam members on-site usually builds the outer circumference of the building, as shown in FIG. This is done by hoisting the pillar / beam member by a lifting machine installed on the constructed beam or slab, and assembling and joining the pillar / beam without a scaffold for assembly.

In this method, an arm hoisting tower crane and an arm horizontal tower crane are used as hoisting machines, but the number of units used is reduced by using a crane having 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. .

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

In addition, since the roof cannot be erected when constructing the frame structure of columns and beams, the above-mentioned work is carried out on a wet steel frame in case of rain, and the work is forced to be stopped because the degree of danger increases.

Therefore, in order to solve the problems of the conventional method, the present applicant has developed a construction method for assembling prefabricated members on site to construct a frame structure such as a steel frame structure or a precast concrete structure. I also applied.

The present invention is a method of constructing a frame structure such as a steel frame structure or a precast concrete structure by assembling prefabricated members on site using a work platform configured to be movable up and down in response to a frame structure already constructed. However, since the work platform can move upward, but it cannot move horizontally, the work range per unit is naturally limited, and work efficiency is not always good.

Therefore, as the scale of the building becomes larger, it is necessary to use a number of work benches, and the work of disassembling and removing the work pieces after assembling the work pieces is difficult.

In view of such circumstances, the present invention is an improvement and development of the construction method according to the previous application, which not only reduces the frame assembly cost but also enables construction in all weathers and shortens the construction period. At the same time, the purpose of the present invention is to propose a new method with improved safety, and to provide an erection workbench for frame construction that also enables automation of construction and labor saving.

[0010]

In order to solve the above-mentioned problems, a erection work platform for frame construction according to the present invention comprises a support column located inside four columns constituting a minimum unit of the frame in plan view. , A work platform installed between the middle parts of the columns, a roof or a work platform installed between the tops of the columns, a wheel that can slide on a beam on a lower floor already constructed, and the work platform, the roof, or And a fixed column supported by a beam on the lower floor, and a column base that is connected to the lower end of the fixed column and is expandable and contractable with respect to the fixed column. The wheel is attached to a lower end portion of the column base and a connecting beam installed on the lower end of the column base.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an illustrated embodiment.

The erection work platform for frame construction of the present invention (hereinafter simply referred to as erection work platform A) is used for constructing a frame composed of ready-made columns C and beams B made of steel aggregate or PC material. It is composed of a work table 1 for assembling work, a column 2 supporting the work table, a lifting machine 3 attached to these, a roof 4 covering the work table 1, and the like.

As shown in FIG. 2, the column 2 is basically composed of four columns C, which form the minimum unit of the frame to be constructed.
Located inside C, the workbench 1 has a floor area of this minimum unit or a flat area necessary for work, and the lifting machine 3 is suspended from the workbench 1. The hoisting machine 3 is freely movable in a plane in a monorail manner for smooth work.

Further, the support column 2 is a fixed column 2a as shown in FIG.
And a column base 2b connected to the lower end of the fixed column 2a so as to be capable of expanding and contracting in the axial direction.

At the lower end of the fixed column 2a, support legs 2c, 2c are provided so as to project in one or two directions on the beam B side.

The support legs 2c, 2c are structured so as to freely project or retract from the side surface of the fixed column 2a.
The column C and the beam B are prevented from colliding with each other during the up and down movement and the lateral movement. Support legs 2c, 2c configured in this way
Is for temporarily supporting the load of the work platform A on the beams B and B when the column base 2b is stored in the fixed column 2a for the purpose of moving the work platform A to the upper floor (Fig. (See 3, 4).

At the lower end of the column bases 2b, 2b, a connecting beam 6 is erected, and the connecting beam 6 is provided with a plurality of wheels 7, 7 which can freely slide on the already installed beams B, B. They are attached at regular intervals in the longitudinal direction of the beam 6.

The wheels 7 and 7 are mounted on the work platform A in the same manner as the support legs 2c.
When it is moved laterally or upward, the side surface of the column base 2b does not collide with the erected column C and the beam B, so that it can freely project or retract (FIGS. 5 and 6). See).

In such a structure, when the work platform A is moved upward, that is, when the column base 2b is stored in the fixed column 2a, the load of the work platform A is applied to the beam B by the support leg 2c of the fixed column 2a. Transmitted to and supported by.

The column base 2b is housed 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 fixed. Is raised, and the fixed column 2a is fixed and then contracted and stored.

The roof 4 is supported by fixed columns 2a which are continuous with the fixed columns 2a of the column 2 from the four corners of the workbench 1. Further, 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 enhanced and workability can be improved.

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

The hoisting machine 3 is used not only for mounting pillar / beam members, but also for mounting an exterior curtain wall or the like.

In the embodiment, as shown in FIGS. 3 and 4, the work platform 1 is extended horizontally, 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.

Next, a construction method of the frame having such a structure will be described.

First, the workbench 1 is moved up to the position of the beam B on the upper floor of the floor where the installation is completed, and then fixed to the beams B and B on the lower floor as shown in the process on the left side of FIG. By fixing the columns 2a, 2a by the support legs 2c, 2c, the work platform A is fixed to the beam B,
The wheel base 7 is supported, the wheel 7 is locked so as not to rotate, and the column bases 2b, 2b are stored in the fixed columns 2a, 2a.

In this state, 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 are performed. During this period, the floor slab on the lower floor is constructed by the lifting machine 3 below the workbench 1.

When the construction within the reach of the workbench 1 is completed, next, the fixing of the support legs 2c, 2c and the lock of the wheels 7, 7 are temporarily released so that the work platform A can move, and the wheels 7, 7 are moved. Support the erection work table A. In this state, since the total weight of the erection work table A is applied to the wheels 7 and 7, at least four wheels 7 and 7 are mounted on one side so that they can be reliably supported.

Then, the erection work table A is slid on the beams B and B to laterally move to the next work section, and the fixed columns 2a are again fixed to the beams B and B by the support legs 2c and 2c. A is supported by beams B and B. In order to perform the work safely, it is desirable that the erection worktable A is completely fixed to the beams B and B by the support legs 2c and 2c, but in the case of simple work,
It is also possible to carry out with the wheels 7 and 7 supported without fixing them.

When the construction on the same floor, that is, the floor on which the erection work table A is installed is completed, the wheels 7 and 7 are locked so as not to rotate. Then, as shown in the step in the center of FIG. 1, the column bases 2b, 2b are extended to move the workbench 1 and the fixed column 2a upward by one layer, and subsequently, the fixed columns 2a, 2a to the support legs 2c, 2C
Overhangs the beams B, B on the upper floor, and by fixing this to the beams B on the upper floor, the erection work table A is supported by the beams B, B on the upper floor. Then, as shown in the process on the right side of FIG.
2b is stored in the fixed column 2a. In addition, the wheels 7 and 7 are projected on the beams B and B on the upper floor.

Thereafter, similarly, the frame work is assembled while moving the erection work table A laterally and upwardly.

FIG. 7, FIG. 8 and FIG. 9 show another embodiment of the erection work table A according to the present invention.
Instead of installing the roof 4 between the tops of the two, a workbench 8 also serving as a roof is installed, and various construction machines such as a lifting machine 9 are installed on the workbench 8 according to the purpose. The other structure is almost the same as that of the previous embodiment.

If this erection workbench A is used, the workbench 8
Since work can be carried out at two places above and below the work table 1 on the lower side, workability is greatly improved. In addition, since a lifting machine installed under the ceiling or on the pillar 2 is not required, overhead safety can be achieved.

[0035]

The present invention is as described above. Since the erection workbench is installed for each minimum unit of the frame, the weight of one pedestal is light, and it does not require a large force to raise itself, and the pillar Since the lifting of members and beam members can be performed close to the workbench, the lifting machine attached to the gantry 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.

Further, since the work of constructing the pillar members and the beam members is all performed on the work table having an area necessary for the work, the safety is high, and the robot for bolting and welding can be installed by using this area. It is possible to automate the construction, and as a result, it is possible to save labor.

Further, since the erection work table can be moved up and down due to the structure in which the struts expand and contract, it can also be moved back and forth, left and right and laterally because the wheels are attached, so the workable range per unit is extremely high. Therefore, the construction work can be carried out very efficiently by using a small number of erection work benches according to the size of the building, and the cost can be reduced.

Further, since the work platform roof allows the work to be carried out without being affected by the weather, the construction period can be shortened, and at the same time, the worker is not stopped due to the rain and the construction efficiency can be improved. It will be.

[Brief description of drawings]

FIG. 1 is an elevational view showing a construction procedure of the present invention.

FIG. 2 is a plan view showing a construction procedure of the present invention.

FIG. 3 is a side view showing the erection work table of the present invention.

FIG. 4 is a side view showing the erection work table of the present invention.

FIG. 5 is a partially enlarged plan view of the erection work table of the present invention.

FIG. 6 is an enlarged vertical sectional view of a mounting portion of a wheel of the erection work table of the present invention.

FIG. 7 is an aa line elevation view in FIG. 9 showing another erection workbench of the present invention.

FIG. 8 is an elevational view taken along line bb in FIG. 9 showing another erection workbench of the present invention.

FIG. 9 is a plan view showing another erection workbench of the present invention.

FIG. 10 is a side view showing a conventional example of a frame construction method.

[Explanation of sign]

A ... Work platform, 1 ... Work platform, 1a ... Movable scaffolding, 1b ...
Movable scaffolding, 2 ... pillars, 2a ... fixed pillars, 2b ... pillar bases, 2c
...... Supporting legs, 3 ... Hoisting machine, 4 ... Roof, 5 ... Lift, 6 ... Connecting beam, 7 ... Wheels, 8 ... Work platform, C ... Pillar, B
…… Liang.

Claims (1)

[Claims] 1. A framing work platform for constructing a frame used in a method of constructing a frame comprising a column and a beam in an upper layer and a direction between beams, and four columns constituting a minimum unit of the frame in plan view. A pillar located inside of the pillar, a work platform installed between the middle parts of the pillar, a roof or a work platform installed between the tops of the pillars, and wheels that can slide on the beams on the lower floor already constructed. , A work platform, a roof or a lifting machine suspended from a pillar, and the pillar is connected to a fixed column supported by a beam on the lower floor and a lower end of the fixed column, with respect to the fixed column. An erection worktable for constructing a frame, wherein the wheel is attached to a lower end portion of the column base and a connecting beam erected on the lower end of the column base.