JPH11107423A - Void block metal fitting, simple swell-preventive metal fitting, and simple execution of void slab thereby - Google Patents

Abstract

PROBLEM TO BE SOLVED: To need no skilfull technique and execute a void slab with a small number of workers in a short period, by assembling an easily portable void form made of light-weight raw materials in metal fixings for void blocks and connecting them both lengthwise and crosswise. SOLUTION: Easily portable void forms 2,... made of light-weight raw materials having a certain length are assembled in metal fittings 1, 1 for void blocks to form a plurality of void form-assembled blocks. These void blocks are laterally connected to each other by binding mutual metal fittings 1 and further, vertically connected by using connecting projections and recessions of the void forms themselves. Welded wire nettings for the upper and lower end reinforcements 3, 3, 4, 4 which are fabricated in a factory to have transferable dimentions, and the void blocks and simple swell-preventive metal fittings 5... assembled in the metal fittings 1, are separately sent in or these are sent in as a half unit. Thereafter, these are connected together. In this way, the structure can be constructed by a small number of workers in a short period.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal fitting for simplifying the construction of a void slab in the field of construction and a simple construction method using the same.

[0002]

2. Description of the Related Art Conventionally, as a construction form of a void slab portion, after a reinforcing steelworker manually assembles a lower reinforcing bar on a temporary slab frame,
Void work is fixed to the bottom of the slab temporary frame that is not related to the lower end reinforcing bar. However, it is common to construct the upper rebar by hand assembly.

Further, a box-shaped unit in which a void form is sandwiched between upper and lower rebars of appropriate dimensions from the beginning at a factory is spread over a temporary frame, and then cut into a standard length. There is also a way to reinforce each other between units.

[0004]

The above-mentioned general construction of the void slab requires a large number of skilled workers, such as a steel bar builder and a void builder, and the division of the work results in poor work efficiency and labor costs. And construction costs will increase.

[0005] In addition, in the manual rebar work and the installation of one void formwork, the work efficiency can be further improved and the work cannot be performed by workers other than skilled workers. It cannot cope with a serious shortage of skilled workers.

On the other hand, a method of laying a box-shaped unit in which a void form is sandwiched between upper and lower rebars on a temporary frame is to form an opening for equipment or electric wiring, because of its nature, a small hole is formed by a regular cutting. Equipment cannot be used, and opening work is performed by gas fusing with a high risk factor.

At the same time, the box-shaped fixing of the upper and lower rebars from the beginning makes it difficult to install reinforcing reinforcements for the lower rebars, it is also difficult to tie the lower rebars, and it requires skill.
The amount of streaks between the units is also large, and the work efficiency deteriorates due to the increase in the work of arranging the streaks and the work of binding.

In addition, since the weight of the box-shaped unit is heavy, the working crane is always in the working condition, the work occupancy of the crane is increased, and other types of construction are affected in terms of construction period.

[0009]

SUMMARY OF THE INVENTION The present invention is directed to a void mold made of a lightweight material of a fixed length which is easy to carry, instead of a void form of a size and a heavy material which cannot be moved by one worker as a conventional general method. By incorporating the frame into the void block fixing bracket to create multiple void form built-in blocks, the worker can move the void block alone,
Workability can be significantly improved because the void formwork that has been arranged one by one can be arranged in block units.

The connection method of the void blocks is as follows. The horizontal connection is achieved by bundling the fixing members of the void block, and the vertical connection is performed by using the concavo-convex molding of the void form itself, thereby enabling easy connection. The improvement can be done on site without any need for skilled workers.

Further, the upper and lower rebar arrangement diagram according to the structural design at the factory is converted into a distribution map of dimensions that can be delivered, and is incorporated into the welding mesh and the void block fixing bracket for the upper and lower rebar manufactured according to the diagram. Using a void block and a simple floating stopper, according to the situation at the construction site,
(1) A simple void in which the lower rebar welded wire mesh, the void block, and the upper rebar welded wire mesh are separately carried in, or (2) A half unit in which the void block is incorporated in the lower rebar welded wire mesh and the upper rebar welded wire mesh is carried in. The construction method can be performed.

In both of the methods (1) and (2), all the main parts are manufactured in a factory, so that a skilled worker is not required. Two types of work can be performed by only non-professional workers as one type of work.

Further, as in the case of a box-shaped unit, construction can be carried out without using a crane at all times, and the reinforcing bar cutting work for various openings can be easily performed by the electric reinforcing bar cutting device because the upper and lower reinforcing bars are separated. It is a safe operation without the use of available and high risk gas cutting equipment.

In addition, unlike the box-shaped unit, the upper and lower rebars are separated from each other, so that the required length of the joint can be incorporated into the welded wire mesh at the time of manufacturing. Only a simple bundling operation between welding wire meshes is required, and no skilled person is required.

As described above, the present invention simplifies void placement work by using various metal fittings and simple construction methods, improves work efficiency, and is a simple work form that addresses future shortages of skilled workers. It aims to provide a reduction in construction costs by shortening labor costs and construction periods.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an overall construction perspective view in which a void slab is formed by using the void form of the present invention in a block shape with a void block fixing bracket.

FIGS. 2 to 13 are explanatory views of a void block in which the void block fixing bracket and the void formwork are incorporated in the void block fixing bracket.

The void block fixing bracket is, as shown in the perspective view of the void block fixing bracket in FIG. 4, a void form fixing, lateral connection, and a space shape maintaining bracket for the upper and lower reinforcing bars manufactured by processing a reinforcing bar.

As shown in the side view of FIG. 7, the shape of the side face of the void block fixing bracket is triangular or square depending on the conditions of construction.

The void block fixing bracket is as shown in FIG.
An iron or stainless steel bar having a diameter of 4 mm or more is processed into a front shape such that two to four void formwork can be accommodated.

The dimensions of the shape are adjusted in accordance with the sectional shape of the void form to be used, and when reinforcement is required, the reinforcement processing is made dense.

As shown in the perspective views and plan views of FIGS. 4 and 6, when the side surface shape is triangular, the front shape is processed so that two to four lightweight void forms are inserted on both sides. Then, the upper and lower reinforcing bars of the same dimensions are welded and molded.

In the case of a square shape, square reinforcing bars for the upper and lower portions are formed, and the shape of the reinforcing bars and the front shape are two to four lightweight void forms.
Reinforcing rods are placed on both sides and welded and molded.

Here, the gist of the void block fixing bracket is summarized below.

(A) A void block as shown in FIGS. 2 and 3 is used in which two to four light-weight void forms having a fixed size are used in combination with a void block fixing bracket 1 and a lightweight material void form. With this configuration, the worker can easily move the void form in block units and place it on the lower reinforcing bar alone in the building site.

(B) By bonding the void block fixing bracket, the lower end reinforcing bar, and the void block fixing bracket to each other with a binding wire or a binding bracket, the void formwork can be fixed to the lower end reinforcing bar and laterally connected as shown in FIG. .

(C) The void block fixing brackets arranged at regular intervals also serve as reinforcing spacers for maintaining the spatial shape of the lower and upper reinforcing bars as shown in FIG.

Next, the vertical connection of the void form block and the sectional shape of the void form will be described.

In the vertical connection of the void form, as shown in FIGS. 9 and 10, a cut portion for connecting concave and convex portions is formed in the vertical direction of the void form itself to vertically connect the void form and the void form blocks.

As shown in the enlarged view of FIG. 11, the cut portion is manufactured by giving a cut angle to the uneven portion in order to prevent the void form from coming off.

The cross-sectional shape of the void form may be circular, elliptical, oval, or polygonal as shown in the sectional view of the void form shown in FIG. 12 in order to facilitate facility piping and electrical wiring at each building site. Use according to the situation at the construction site.

At the same time, depending on the situation at the construction site, the void formwork itself is manufactured by opening a space for equipment piping and electric wiring inside.

FIG. 13 is a layout plan view in which a void form block combining a void block fixing bracket 1 and a lightweight void form 2 is vertically and horizontally connected on a lower reinforcing bar 3.

Next, a description will be given of a simple block construction method for a void slab using the void block fixing bracket 1 and the simple floating stopper 5.

First, a bar-type spacer 7 is placed on the temporary frame 6 of the slab portion as shown in FIG. 16 in order to maintain a space shape for covering concrete.

In order to make the upper reinforcing bar 4 and the lower reinforcing bar 3 sized to be transportable in accordance with the reinforcing bar of the structural design, divisional allocation is performed in the direction of the reinforcing bar, and a welding wire mesh having the split allocation dimensions is manufactured at the factory as shown in FIG. I do.

As shown in FIG. 14, the welding wire mesh used in this construction method has a required joint dimension in one or both directions of the main reinforcing bars and the distribution bars in order to simplify the joint work between the welding wires. It will be.

The lower reinforcing bar of the welding wire mesh is placed on the bar-shaped spacer 7 so as to overlap with the joint in the direction of the force distribution bar as shown in FIG.

The joints extending from the lower beam reinforcing bar and the lower beam reinforcing bar and the lower beam reinforcing bar are bound together.

Subsequently, a void block formed by combining a void formwork and a void block fixing bracket at a factory on the lower reinforcing bar arranged on the temporary frame 6 is provided with a void block at a void formwork placement location based on a structural design. It is vertically and horizontally connected and bound and fixed as shown in FIG.

As the material of the void form, a lightweight material such as styrofoam, paper, or plastic is used to reduce the weight of the void block.

The lower reinforcing bar and the void block are bound and fixed so as not to be displaced, and the divided and allocated upper reinforcing bar welding mesh is placed on the joint in the direction of the distribution muscle as shown in FIG. I will spread it.

After arranging the upper rebar welded wire mesh, the joints extending from the upper beam rebar and the small beam rebar and the spread upper end rebar and the joint between the upper rebar weld wire meshes are bound.

FIG. 16 is a cross-sectional view after the arrangement of the upper and lower rebars and the void blocks.

After the reinforcing bars have been arranged, a simple retaining metal fitting 5 is provided to prevent the entire void slab from rising when concrete is cast and preventing the concrete from being removed.
Is installed.

FIG. 19 is a perspective view showing the arrangement of the simple floating fittings.

Next, a description will be given of a simple half unit installation method for further reducing the labor of the simple block installation method of the void slab using the void block fixing bracket and the simple floating stopper.

The features of the simple half unit construction method are the same as those of the simple block construction method up to the arrangement of the lower end reinforcing bar welding wire mesh, but a void block which is a combination of the upper end reinforcing bar welding wire mesh, the void block fixing bracket, and the void formwork in advance. This is a method of manufacturing and constructing a top-end rebar welded wire mesh incorporating a half-unit specification void block by binding and fixing in a factory.

FIG. 20 is a perspective explanatory view of a half unit.
FIG. 21 is a front view, and FIG. 22 is a side view.

In the construction procedure, as shown in FIG. 23, the half units incorporating the void blocks are sequentially placed on the joints in the direction of the distribution muscles on the lower end reinforcing bar which has been arranged, and thereafter, are arranged. Work is performed in the same way as the simple block construction method.

Next, the simple floating stopper 5 will be described.

In the conventional metal fittings for retaining the reinforcing bar and the slab temporary frame, a hook separator having an upper end bent on a hook is hooked on the reinforcing bar, and one of the two is fastened and fixed at the lower portion of the temporary frame with a foam tie or the like.

Naturally, the fixing work was performed by two persons, and several kinds of separators were used for dimensional adjustment when the height of the temporary frame and the reinforcing bar were different.

The gist of the present invention is a floating stopper which can be used alone to prevent the floating when concrete is poured, and the height of which can be easily adjusted with one kind of fitting.

FIG. 24 is a front view of the simple floating stopper.

First, a hole is drilled in the temporary frame, a simple retaining fitting is inserted, and the temporary frame receiving flash type fixing bracket 1 is inserted.
3 is fixed to the temporary frame.

The P-con 12 is fixed by the P-con fixing spring 11 by the repulsive force of the spring so that no gap is formed in the temporary frame as shown in FIG.

The rebar hook 8 is hooked on the upper rebar, and the dimension adjusting rotation buckle 9 is rotated to adjust the dimension with the temporary frame and fixed.

After the concrete casting work, the lower separating part 10
Since a notch for threading is made in the lower part of, the part below the temporary frame is easily folded and removed with a torque wrench or the like.

[0061]

According to the present invention, the following effects can be obtained.

A void block manufactured by a combination of a void block fixing bracket and a void mold made of a lightweight material can be manufactured by moving one void form at a time on a building site or by adding one to a void form receiving bracket previously set on a temporary frame. Workability is greatly improved because there is no need to fix them one by one, and the simple connection of the vertical and horizontal void blocks.

Since the void form has a cross-sectional shape adapted to the situation at the construction site, the work of equipment piping and electric wiring can be saved.

[0064] The simple block construction method is almost entirely factory-fabricated by using a welded wire mesh allocated at the factory and dimensioned for transportation, a lightweight and simple void block, and a simple floating stopper. Skilled skills are no longer needed and specialized craftsmen are no longer needed.

Although the conventional types of construction were two types, that is, a reinforcing bar operation and a void formwork installation operation, the type of operation is now one type.
Significant labor saving and shortening of construction period became possible.

The simple half unit construction method in which the simple block construction method is further labor-saving is a prefabricated construction method in which the on-site assembly work is further reduced from the simple block construction method.

This is a construction method suitable for a small number of workers to work in a short period of time.

In both the simple void construction method and the simple half unit construction method, the reinforcement at the various openings of the facilities and the like can be easily installed by separately performing the lower reinforcement and the void formwork and the upper reinforcement. Since the material is transported to the construction site in the form of a void block or a welded wire, the time required for material transportation can be reduced.

In the simple floating stopper, the height of the temporary frame and the upper rebar is adjusted by one type of metal fitting, and the flash type anchor is used to insert the temporary frame into the hole on the temporary frame without using any fasteners. In addition, when necessary, the P-con or hat bracket is fixed to the temporary frame by the force of the spring, so that the conventional work always has to be carried out by the two people above and below the temporary frame. By making it easier for one person to do so, the workability was greatly improved and labor costs were reduced.

The convenience of the simple floating stopper and the use of the void block manufactured by the combination of the void block fixing bracket and the void formwork of the lightweight material allow the simple void construction method and the simple half unit construction method to be used. The construction period can be shortened and construction costs can be saved.

[Brief description of the drawings]

FIG. 1 is a perspective view of an entire void slab using a void block.

FIG. 2 is a perspective view of a void block.

FIG. 3 is a plan view of a void block.

FIG. 4 is a perspective view of a void block fixing bracket.

FIG. 5 is a front view of a void block fixing bracket.

FIG. 6 is a plan view of a void block fixing bracket.

FIG. 7 is a side view of a void block fixing bracket.

FIG. 8 is a horizontal connection diagram of a void block.

FIG. 9 is a vertical connection diagram of a void block.

FIG. 10 is a connection diagram of a void formwork.

FIG. 11 is an enlarged view of a connecting portion of a void formwork.

FIG. 12 is a sectional view of a void form.

FIG. 13 is a plan view showing the arrangement of void blocks on a lower reinforcing bar.

FIG. 14 is a plan view of the upper and lower rebar welded wire meshes.

FIG. 15 is a joint method diagram of upper and lower rebar welded wire meshes.

FIG. 16 is a sectional view of a void slab using a void block.

FIG. 17 is a perspective view showing the arrangement of void blocks on a lower reinforcing bar.

FIG. 18 is a perspective view of an upper reinforcing bar arranged on a void block.

FIG. 19 is a perspective view of the arrangement of a simple retaining metal fitting after the construction of the void slab.

FIG. 20 is a perspective view of a half unit incorporating a void block.

FIG. 21 is a front view of a half unit incorporating a void block.

FIG. 22 is a side view of a half unit incorporating a void block.

FIG. 23 is a perspective view of an arrangement method of a half unit incorporating a void block.

FIG. 24 is a front view of the arrangement of a simple floating stopper.

FIG. 25 is a diagram showing a method of fixing the simple floating stopper to the temporary frame.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Void block fixing bracket 2 Void formwork 3 Lower reinforcing bar 4 Upper reinforcing bar 5 Simple floating stopper 6 Temporary frame 7 Bar-shaped spacer 8 Rebar receiving hook 9 Dimension adjustment rotating buckle 10 Lower seba 11 PCON fixing spring 12 PCON 13 Temporary frame support flash type fixing bracket 14 Flash type fixing bracket fixing bolt

Claims (5)

[Claims] 1. A fixed, horizontal connection and upper end of a void form for forming a plurality of void form blocks by laterally connecting a single void form for a void slab of a predetermined size at a building site or a factory. It is a metal fitting for maintaining the space between the reinforcing bar and the lower reinforcing bar. 2. A void form to be incorporated into the void block fixing bracket of claim 1 has a fixed length, a circular, elliptical, oval, or polygonal cross section, and is vertically connected to both ends in the vertical direction. It is a molded product for a void formwork made of a lightweight material, which has been subjected to an angled concave / convex shape connection for preventing the connection from falling off. 3. A welding wire mesh for a lower end reinforcing bar, which is allocated to a size that can be delivered at a factory as a lower end reinforcing bar, is disposed on a slab temporary frame at a construction site to form a slab portion. After installing the lightweight void formwork into the metal fitting of claim 1 and forming a plurality of blocks, and arranging a welding wire mesh for the upper end rebar subjected to measurement processing in the same manner as the lower end rebar as the upper rebar, This is a simple void block arrangement method for forming a void slab by connecting necessary portions of upper and lower rebars. 4. A welding wire mesh for an upper end reinforcing bar having a void form built into a half unit by previously connecting a void block made by the void block fixing bracket of claim 1 to a welding wire mesh for an upper end reinforcing bar at a factory. This is a simple construction method in which half units of void slabs are continuously laid and are successively placed on a lower reinforcing bar. 5. A simple retaining metal fitting for fixing a reinforcing steel bar on an upper end and a slab temporary frame in order to prevent the void slab from floating when concrete is put into the concrete, when the simple construction method for a void slab according to claim 3 or 4 is carried out. .