JPH04203070A - Construction method of skeleton and construction work holder thereof - Google Patents

Abstract

PURPOSE:To enable the reduction of manpower and to curtail a cost by suspending column members and beam members by means of work holders provided in the minimum unit of a skeleton to assemble them, extending pedestals to raise benches after the completion of assembly, and repeating the process. CONSTITUTION:Skeleton construction holders A are constituted of struts 2... positioned to the insides of four columns C... forming the minimum unit of a skeleton and benches 1... constructed between intermediate sections of the struts. After that, the work holders A are glided on beams B... of a constructed lower floor with wheels 7... to move them horizontally, and fixed columns 2a... or the wheels 7 are borned on the beams B. Then, column members and beam members are suspended by cranes 3... to assemble them, and pedestals 2b... are extented to raise the fixed columns 2a and benches 1 after the completion of assembly. Skeletons are subsequenctly constructed by repeating the process.

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.
The present invention relates to a method for constructing a frame and a work frame for constructing a frame used in the method for constructing a frame.

[Problem to be solved by the invention]

As shown in Figure 10, the method of constructing a frame by assembling steel column and beam members and precast concrete IJ-column columns and beam members on site is usually carried out on the outer periphery of the building or on the already constructed beams or beams. A lifting machine installed on the slab lifts the column and beam members, and the column and beam members are lifted up without scaffolding for assembly.
This is done by assembling and joining beams.

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.

Therefore, in order to solve these problems with conventional methods, the applicant has developed a construction method in which prefabricated members are assembled on-site to construct a frame structure such as a steel frame structure or precast concrete structure, and has already filed an application. .

This invention is a method of constructing a frame such as a steel frame structure or a precast concrete structure by assembling prefabricated members on-site using a work platform that is configured to be able to move upwardly while receiving an already constructed frame. Although the work platform can move upward, it cannot move horizontally at all, so the working range per platform is naturally limited, and the work efficiency is not necessarily good.

For this reason, the scale of the building increases, and therefore it is necessary to use a number of workbenches, and the work of assembling them and dismantling them after construction is difficult.

In light of these circumstances, this invention improves and develops the construction method related to the previous application, and reduces the cost of frame assembly.
- We have proposed a new method that not only reduces the amount of energy involved, but also enables construction in all weather conditions, shortens the construction period, and improves safety, as well as automating construction and saving labor. This is a new proposal.

[Means to solve the problem]

In order to solve the above-mentioned problems, a frame construction work frame according to the present invention is a frame construction work frame used in a frame construction method for assembling a frame consisting of columns and beams in the upper layer and the direction between the beams. The pillars located inside the four pillars that make up the smallest unit of the frame, the work platform constructed between the middle parts of the pillars, the roof constructed between the tops of the pillars, and the lower floor that has already been constructed. It consists of wheels that can slide on beams, and a lifting machine suspended from a workbench, roof, or support, and the support supports a fixed column supported by the beam on the lower floor, and a fixed column connected below the fixed column. It consists of a column base that is expandable and retractable.

Further, the frame construction method according to the present invention is a method of constructing a frame in which a frame consisting of columns and beams is assembled in the upper layer and the direction between the beams using the work frame for frame construction, and the frame is moved horizontally by sliding on the already constructed beams. Then, with the fixed columns or wheels supported by the beams on the lower floor that have already been constructed, 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 wheels are supported by the beams on the lower floor. This is a method of building a frame by repeating the steps of raising the platform, supporting the fixed columns or wheels on the beams on the upper floor, and assembling the column and beam members.

In the present invention, the columns that support the work platform that serve as scaffolding are made telescopic, and each time the construction of one floor is completed, the columns are extended to raise the work platform to the upper floor, and the columns are fixed to the beams on the upper floor. In addition, wheels that can slide on the already constructed beams are installed, and the workbench can be rearranged by sliding on the constructed beams and moving horizontally every time the construction of a section on the same floor is completed. At the same time, by attaching a lifting machine that lifts column and beam members to a predetermined position from a workbench, roof, or support, the need for a heavy tower crane is eliminated, and along with this, columns and beams can be In addition to eliminating the need for reinforcement and reducing costs, construction safety is improved by using the workbench as a scaffold when assembling columns and beams. 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, It consists of a lifting machine suspended from the roof or pillars, and the pillars are erected above and below the workbench, and are connected to fixed pillars supported by beams on the lower floor, and connected to the fixed pillars below. It is formed from a telescopic column base.

To construct the frame, after moving it horizontally, the fixed columns or wheels are supported by the beams on the lower floor, which have already been constructed, and then the column and beam members on the upper floor are lifted up and assembled. After completion, the column bases are extended, the fixed columns and work platforms are raised, the fixed columns or wheels are supported by the beams on the upper floor, and the columns and beams are reassembled. This procedure is repeated.

〔Example〕

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

As shown in FIG.
It consists of a pillar 2 that supports this, a lifting machine 3 attached to these, a roof 4 that covers the workbench 1, etc., and the workbench A is used to lift columns C and beams of steel frame or precast concrete construction. A frame consisting of B can be constructed.

The supports 2 for the work platform are basically located inside the four pillars C that constitute the smallest unit of the structure as shown in Figure 2, and the work platform 1 is located on the floor area of this minimum unit or as necessary for the work. The lifting machine 3 is installed suspended from a workbench 1 as shown in FIG.

The lifting machine 3 suspended from the workbench I can be freely moved within a plane on the mole rail 2 to facilitate the 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.
As shown in Fig. 2, the lower end lever of the fixed column 2a has support legs 2c, 2c supporting the load on the work platform from the beams B and B4 in two directions on the beam B side, or in one direction. It is installed in a protruding manner. These support legs 2c, 2c can be moved in and out of the fixed column 2a, or can be folded down by a hinge, or can be detached from the fixed column 2a, in order to avoid collision with the beams B and B on the upper floor when the workbench 1 is raised. attached to.

The sections of the Ei and low ports in FIG. 2 show the planes of the Ei and low ports, respectively, in FIG.

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

The column base 2b is retracted by being stored within the fixed column 2a as shown in FIG. At the lower end of the column base 2b, a supporting leg 2d is protruded to bear the load when the fixed column 2a is extended, that is, when the fixed column 2a is raised, so as to be movable in and out, collapsible, or detachable. ing.

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

When the column Jil 12b is stored, the load on the work platform is supported, for example, by the support leg 2c of the fixed column 2a, and the support leg 2d or wheel 7 of the column base 2b, which is stored with its lower end exposed, as shown in the figure. .

Figure 4-■ is a modification of I and II, in which the column base 2b is completely housed within the fixed column 2a, and the support leg 2d of the column base 2b is protruded from a notch formed at the lower end of the fixed column 2a. This is a case where the load on the work platform is supported by this and the support leg 2c of the fixed leg 2a.

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.

In addition, a connecting beam 6 is installed at the lower end of the fixed columns 2a, 2a, and among the connecting beams 6, the connecting beams 6, 6, which are installed parallel to each other, are connected to the top of the installed beams B, H. A plurality of wheels 7, 7 that can slide are installed at regular intervals in the longitudinal direction of the beam 6, and the work platform A slides on the installed beams B, H and moves forward and backward or left and right. It can move freely in any direction with its own blade.

In addition, connecting beams 6 are erected around the four circumferences of the fixed columns 2a, 2a,
If wheels 7 and 7 are attached to each of them, the work platform A
It is possible to move horizontally in both forward and backward and left and right directions.

In addition, since the column width is usually larger than the beam width, when moving the work frame A horizontally or upwardly, the wheels 7, 7 should be tightened to prevent them from colliding with the already erected columns C and beams B. 6 (see FIGS. 6 and 7), or can be folded down by a hinge (see FIG. 8), or detachably attached.

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, and a lift 5 is attached to the outer peripheral side of the support 2 to lift mainly pillar members or beam members.

This lifting machine 3 is used not only for attaching members of columns and beams, but also for attaching exterior curtain walls and the like.

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.

In addition, the movable scaffold 1a may have a structure in which it is supported by a column 2 and rotated about the column 2 as shown in FIG. 10.

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 I, work platform A
will be installed inside four pillars C corresponding to its scale.

The workbench 1 shall be provided with an opening 1b as shown in FIG. 10 as necessary for lifting columns and beams from the lower floor.

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, according to Figures 1 and 2, the construction procedure for one layer is 1 + lI ¥
Explain.

First, after moving the work platform 1 upward to the position of the beam B on the upper floor of the layer where construction has been completed, fixing columns 2a are attached to the beams B and B on the lower floor as shown in the process on the left side of Fig. 1. Support legs 2c, 2c
Alternatively, the work frame A is fixed by the support legs 2c and wheels 7 and supported by the beams B, and the column base 2b is stored.

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 the racks are installed and connected. 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.

When construction within the reach of the workbench 1 is completed, the support legs 2c, 2c are temporarily unfixed so that the construction workbench A can move, and the wheels 7, 7 are made to support the construction workbench A.

Then, the construction work platform A is slid over the beams B and B to move laterally to the next work area, and then back to the beam B.

Fixing column 2a to support leg 2c, 2c or support leg 2
The work platform A is fixed by the zero wheels 7 and supported by the beams B and B.

In addition, in order to perform the work safely, the construction workbench A should be placed on the support legs 2c.
, 2c, it is best to carry out the work in a state where it is completely fixed to the beams B, B, but in the case of simple work, it is also possible to carry out the work with it supported by the wheels 7, 7 without daring to fix it.

When the construction of the same floor, that is, the floor where the construction work platform A is installed, is completed, the load on the work platform is lowered by the support leg 2d at the lower end of the column base 2b, as shown in the center step of Fig. 1. With the load on the beam B of the floor, the column base 2b is extended to move the work table 1 and fixed column 2a up by one floor, and the supporting legs 2c and wheels 7 are extended from the fixed column 2a. is 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 the necessary area for the work, making it highly safe.The area can also be used to install robots for bolt tightening and welding, thereby automating construction work. As a result, it is possible to save labor.

In addition, since the construction workbench can not only move upward, but also move horizontally, forward and backward, and from side to side, the possible range of foam-containing construction is extremely wide. By using this, construction work can proceed extremely efficiently and costs can be reduced.

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 the drawing]

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 11 are elevational views showing details of the supporting leg part when the column leg is stored, and are respectively views taken in the X direction and Y direction in FIG.
Figure 4 -■ is I. Fig. 5 is a partial plan view of Fig. 2, and Fig. 6, Fig. 7, and Fig. 8 show the structure of the wheel mounting section. 6 and 8 are plan views thereof, FIG. 7 is a longitudinal sectional view thereof, FIG. 9 is a plan view of the movable scaffold, and FIG. 10 is an elevational view showing the conventional method. A...Work platform, 1...Work platform, 1a
...Movable scaffold, lb...Movable scaffold, 2...
...Strut, 2a...Fixed pillar, 2b...
・Column base, 2c...Support leg, 2d...Support leg, 3...Lifting machine, 4...Roof, 5
...Lift, 6...Connecting beam, 7...Wheel,
C: Column, B: Beam. Figure 3 Figure 6 Figure 7 Procedural amendment - April 19, 1991 Mr. Satoshi Uematsu, Commissioner of the Japan Patent Office 1, 1
9 Ushi no 2 Shiyun 1990 Special Application No. 334233
No. 2, Name of the invention Method for constructing a frame and a work platform for its construction 3. Relationship with the amended person's case Patent applicant name (137) Kajima Corporation 4, agent address ■107 Akasaka, Minato-ku, Tokyo 6-5-21 Shadow Akasaka 5, Date of correction order Voluntary correction 6, Drawing subject to correction 7, Contents of correction A9Q-

Claims (3)

[Claims] (1) A frame construction work platform used in the method of constructing a frame consisting of columns and beams in the direction of the upper layer and between the beams, and is inside the four columns that constitute the smallest unit of the frame in a plan view. A support located at the bottom, a workbench installed between the middle parts of the support, a roof installed between the tops of the support, wheels that can slide on the beams of the lower floor that has been constructed, a workbench, a workbench installed between the middle parts of the support, It consists of a lifting machine suspended from a column, and the column is characterized by consisting of a fixed column that is supported by a beam on the lower floor side, and a column base that is connected to the bottom and is extendable and retractable with respect to the fixed column. A work platform for constructing a frame. (2) The work frame for constructing a frame according to claim 1, wherein the wheels are provided on a connecting beam constructed between the column bases of the columns. (3) A method for constructing a frame in which a frame consisting of columns and beams is assembled in the upper layer and in the direction between the beams using the work platform for constructing the frame according to claim 1 or 2, wherein the frame is slid on the already constructed beams. Then, with fixed columns or wheels supported by the beams on the lower floor that have already been constructed, the column and beam members on the upper floor are lifted and assembled, and after assembly, the column bases are extended and fixed. A method for constructing a frame, which comprises repeating the steps of raising columns and a workbench, supporting fixed columns or wheels on beams on the upper floor, and assembling column and beam members.