JPH04297665A - Erection-working base for construction of structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an erection workbench for constructing a frame such as a steel frame structure or a precast concrete structure by assembling prefabricated members on site.

0002

[Problems to be Solved by the Invention] The method of constructing a frame by assembling steel column/beam members or precast concrete column/beam members on-site is usually carried out on the outer periphery of a building, or as shown in Figure 10. It is carried out by lifting the column and beam members using a lifting machine installed on the already constructed beam or slab, and assembling and joining the columns and beams without scaffolding for assembly.

[0003] In this method, an arm hoisting tower crane or a horizontal arm tower crane is used as a lifting machine, but the number of cranes used is reduced by using a crane 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 braces into the frame as shown in the diagram, leading to increased costs. .

[0004]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, which means that workers cannot directly climb onto the pillars. The work involved walking on beams is extremely dangerous, leading to a serious shortage of workers.

[0005] Additionally, since the roof cannot be erected when constructing the column-beam frame, the above-mentioned work must be done on a wet steel frame in rainy weather, which increases the level of danger and has to stop the work.

[0006] Therefore, in order to solve the problems of the conventional methods, the present applicant has developed a construction method in which prefabricated members are assembled on site to construct frames such as steel structures and precast concrete structures. I also applied.

[0007] This invention is a method for 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 able to move upwardly while receiving an already constructed frame. However, although the work platform can move upward, it cannot move horizontally at all, so there is a natural limit to the work range of each work platform, and the work efficiency is not necessarily good.

[0008] For this reason, as the scale of the building increases, it becomes necessary to use a number of workbenches, and the work of assembling them and dismantling them after construction is difficult.

[0009] In view of these circumstances, this invention improves and develops the construction method related to the previous application, and not only reduces the cost of assembling the frame, but also enables construction in all weather conditions, shortening the construction period. At the same time, the purpose of this project is to propose a new method with improved safety and to provide an erection workbench for frame construction that makes it possible to automate construction and save labor.

0010

[Means for Solving the Problems] In order to solve the above-mentioned problems, an erection workbench for constructing a frame according to the present invention is provided with support columns located inside four columns constituting the smallest unit of the frame in plan view. , a workbench installed between the intermediate parts of the supports, a roof or workbench installed between the tops of the supports, wheels that can slide on the beams of the lower floor that has been constructed, and the workbench, roof or A lifting machine suspended from a column, and the column has a fixed column supported by a beam on the lower floor side, a column base connected to the lower end of the fixed column and extendable with respect to the fixed column. The wheels are attached to the lower end of the column pedestal and to a connecting beam constructed at the lower end of the column pedestal.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an illustrated embodiment.

[0012] The construction workbench for constructing a frame (hereinafter simply referred to as construction workbench A) of the present invention is used to construct a frame consisting of ready-made columns C and beams B made of steel frames, PC materials, etc. It consists of a workbench 1 for assembly work, a support column 2 that supports it, a lifting machine 3 attached thereto, a roof 4 that covers the workbench 1, and the like.

The pillars 2 are basically four pillars C, which constitute the smallest unit of the frame to be constructed, as shown in FIG.
The workbench 1 is located inside the workbench 1 and has a floor area of this minimum unit or a plane area necessary for the work, and the lifting machine 3 is installed suspended from the workbench 1. It should be noted that the lifting machine 3 can be freely moved within a plane in a monorail manner to facilitate the work.

[0014] Furthermore, as shown in FIG.
a, and a column base 2b which is extendably connected to the lower end of the fixed column 2a in the axial direction.

At the lower end of the fixed column 2a are support legs 2c, 2.
c is provided to protrude from the beam B side in one or two directions.

The support legs 2c, 2c are structured to freely protrude or retract from the side surface of the fixed column 2a, so that they do not collide with the column C or beam B when the work platform A is raised or lowered or moved laterally. It looks like this. The support legs 2c, 2c configured in this way are used to support the work platform A when storing the column base 2b within the fixed column 2a for the purpose of moving the work platform A to an upper floor.
This is to temporarily support the load on beams B and B (see Figures 3 and 4).

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

Similar to the support legs 2c, the wheels 7, 7 are used when moving the work platform A laterally and upwards.
The side surface of the column base 2b is designed to freely protrude and retract to avoid colliding with the already-erected columns C and beams B (see Figures 5 and 6).

In such a configuration, when moving the work platform A upward, that is, when storing the column base 2b in the fixed column 2a, the load of the work platform A is applied to the support leg 2 of the fixed column 2a.
It is transmitted to and supported by beam B by c.

Note that the column base 2b is stored inside the fixed column 2a when the column members and beam members are erected, and after the construction of one layer of the frame is completed, it is extended and attached to the fixed column 2a and the workbench 1. is raised, and after the fixing column 2a is fixed, it is contracted and stored.

The roof 4 is supported by fixed columns 2a that extend from the four corners of the workbench 1 to the fixed columns 2a of the support columns 2. Further, the roof 4 has a larger planar area than the workbench 1, and its periphery extends beyond the workbench 1 as shown in the figure.

[0022] 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 circumferential side of the support 2 for lifting mainly pillar members or beam members.

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

In this embodiment, as shown in FIGS. 3 and 4, a movable scaffold 1a, which extends horizontally from the workbench 1 and is located below the lift 5, is housed in a manner that can be moved in and out, thereby improving work efficiency.

[0026] Next, the construction method of the frame in such a configuration will be explained.

First, the work platform 1 is moved up to the position of the beam B on the upper floor of the floor where construction has been completed, and then fixed to the beams B on the lower floor as shown in the process on the left side of FIG. Pillars 2a, 2a
By fixing the column bases 2b, 2b with the support legs 2c, 2c, the work platform A is supported by the beams B, B, and the wheels 7 are locked so that they do not rotate.
, 2a.

In this state, 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 pillar members and beam members are erected 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 all the work within the reach of the work platform 1 has been completed, support legs 2c, 2c are installed so that the work platform A can move.
and temporarily unlock the wheels 7, 7, and allow the wheels 7, 7 to support the erection workbench A. In this state, the entire weight of the construction platform A is applied to the wheels 7, 7, so at least four wheels 7, 7 should be installed on each side to ensure reliable support.

Then, the construction workbench A is slid on the beams B, B and laterally moved to the next work section, and the fixing column 2a is fixed to the beams B, B again with the support legs 2c, 2c, and the workbench is assembled. A is supported by beams B and B. In addition, in order to carry out the work safely, it is desirable to perform the work with the erection work platform A completely fixed to the beams B, B by the support legs 2c, 2c, but in the case of simple work, do not intentionally fix the work platform A to the beams B, B, but if the work is simple, do not fix it. , 7 can also be used.

When the construction of the same floor, that is, the floor where the construction workbench A is installed, is completed, the wheels 7, 7 are locked so that they do not rotate. Then, as shown in the process in the center of Figure 1,
The column bases 2b, 2b are extended to move the workbench 1 and the fixed column 2a up by one layer, and then the fixed columns 2a, 2a are moved upward by one layer.
The support legs 2c, 2C are extended over the beams B, B on the upper floor and are fixed to the beam B on the upper floor, so that the construction workbench A is supported by the beams B, B on the upper floor. Subsequently, as shown in the step on the right side of FIG. 1, the column base 2b is stored in the fixed column 2a. Moreover, the wheels 7, 7 are made to project over the beams B, B on the upper floor.

Thereafter, the frame is assembled in the same manner while moving the construction workbench A laterally and upwardly.

FIGS. 7, 8 and 9 show other embodiments of the construction workbench A according to the present invention, in which support columns 2,
Instead of installing a roof 4 between the tops of the roofs 2 and 2, a workbench 8 that also serves as a roof is installed, and various construction machines such as a lifting machine 9 are installed on this workbench 8 depending on the purpose. The other configurations are substantially the same as those in the previous embodiment.

If this construction workbench A is used, the workbench 8
Since work can be carried out at two locations above and below the workbench 1 on the lower side, work efficiency is greatly improved. Further, since a lifting machine installed under the ceiling or on the support column 2 is not required, overhead safety can be ensured.

[0035]

Effects of the Invention The present invention is as described above, and since the erection workbench is installed for each minimum unit of the structure, the weight of each workbench is light, and it does not require a large force to lift itself up. Since the members and beam members can be lifted 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.

[0036] In addition, all construction work for column and beam members is carried out on a workbench with the necessary area for the work, so safety is high, and this area can be used to install robots for bolting and welding. It is possible to automate construction, and as a result, it is possible to save labor.

[0037] In addition, the construction work platform can not only move up and down due to the structure of the struts expanding and contracting, but also move horizontally, front and back, and from side to side due to the wheels attached, so the range of work that can be done by each platform is extremely wide. It is wide, and therefore, depending on the scale of the building, construction work can be carried out extremely efficiently using as few construction workbenches as possible, and costs can be reduced.

Furthermore, the presence of the roof of the work platform allows work to be carried out without being affected by the weather, thereby shortening the construction period and eliminating worker downtime due to rain, making construction more efficient. It turns out.

[Brief explanation of drawings]

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

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

FIG. 3 is a side view showing the construction workbench of the present invention.

FIG. 4 is a side view showing the construction workbench of the present invention.

FIG. 5 is a partially enlarged plan view of the construction workbench of the present invention.

FIG. 6 is an enlarged longitudinal cross-sectional view of the wheel mounting portion of the construction workbench according to the present invention.

FIG. 7 is an elevational view taken along line aa in FIG. 9, showing another construction workbench of the present invention.

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

FIG. 9 is a plan view showing another construction workbench according to 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 scaffold, 1
b...Movable scaffolding, 2...Column, 2a...Fixed column, 2b...
Column base, 2c... Support leg, 3... Lifting machine, 4... Roof, 5
...Lift, 6...Connection beam, 7...Wheel, 8...Workbench, C...
...Column, B...Beam.

Claims (1)

[Claims] Claim 1: An erection workbench used for constructing a frame, which is used in a frame construction method for assembling a frame consisting of columns and beams in the upper layer and in the direction between the beams, in which four columns constitute the smallest unit of the frame in plan view. A pillar located inside the pillar, a work platform constructed between the middle parts of the pillar, a roof or work platform constructed between the tops of the pillars, and wheels that can slide on the beams of the lower floor that has already been constructed. , a lifting machine suspended from the workbench, the roof, or a support; 1. A construction workbench for constructing a frame, comprising a column base that is extendable and retractable, and the wheels are attached to a lower end of the column base and a connecting beam installed at the lower end of the column base.