JP2001063956A - Foundation concrete lifting jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jig capable of lifting work for a foundation concrete block without the need for applying a wire to the foundation concrete block. SOLUTION: This foundation concrete lifting jig 1 of rectangular contour having an inner size larger than the outer size of a foundation concrete block is rectangularly assembled with steel materials 2 and steel materials 3. A pair of opposed steel materials 2 on one hand can be vertically bent at or near their centers and a pair of steel materials 3 on the other hand are provided with wire lifting portions 4. Elastic bodies (for example, rubber plates 6) are set inside the steel materials 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a jig for suspending foundation concrete.

[0002]

2. Description of the Related Art When lifting and moving a foundation concrete block made of precast concrete using a crane, a wire is hung on the foundation concrete block,
The wire is lifted and moved by a crane.

[0003]

However, in the conventional work of laying a wire on a foundation concrete block, one side of the foundation concrete block has to be lifted and the wire has to be passed through, which has been a heavy labor.

Accordingly, an object of the present invention is to provide a jig which does not require a wire to be laid on a foundation concrete block and can easily carry out a work of lifting the foundation concrete block.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the invention according to claim 1 is, for example, as shown in FIG. 1, a rectangular foundation having an inner size larger than the outer shape of a foundation concrete block (8). A jig for concrete suspension (1), which is formed in a rectangular shape by steel materials (2, 2, 3, 3), and a pair of opposite steel materials (2, 2) are vertically arranged at a substantially central portion. The other pair of steel materials (3, 3) that can be bent and has a wire hanging portion (4, 4) is characterized.

Here, the inner dimensions of the jig for suspending the foundation concrete may be any size as long as the foundation concrete block can be easily passed through.

As described above, according to the first aspect of the present invention, a jig for suspending a foundation concrete made of a steel material assembled into a rectangular shape having an inner size larger than the outer shape of the foundation concrete block is provided outside the foundation concrete block. By covering and bending the pair of opposed steel materials, the inner dimensions of the jig for hanging the foundation concrete are reduced, and the other pair of opposed steel materials abut the foundation concrete block and sandwich the foundation concrete block. Thus, the foundation concrete block is connected to the jig for suspending the foundation concrete, and the foundation concrete block can be easily lifted by installing a wire in the wire suspension portion provided on the other pair of opposite steel materials.

According to a second aspect of the present invention, there is provided the jig for suspending a foundation concrete according to the first aspect, wherein, as shown in FIG. 3, for example, the wire suspending portion projects upward substantially at the center of the steel material. It is characterized by:

As described above, according to the second aspect of the present invention, since the wire suspending portion is provided substantially at the center of the steel material of the jig for suspending the foundation concrete, the jig for suspending the foundation concrete is connected to the foundation concrete block. When connecting and lifting, the center of gravity of the foundation concrete block can be easily taken, and the lifting operation can be performed safely.

According to a third aspect of the present invention, there is provided the jig for suspending a foundation concrete according to the first aspect, for example, as shown in FIG. 1, a steel material having a wire suspension portion is brought into contact with a foundation concrete block. An elastic body (for example, plate rubbers 6, 6) is provided.

Here, examples of the elastic body include rubber and resin.

As described above, according to the third aspect of the present invention, the elastic member is provided on the part of the jig for hanging the foundation concrete, which is in contact with the foundation concrete block, inside the steel material having the wire suspension part. Since the steel material and the basic concrete block are in close contact with each other, the basic concrete block is hard to slip, and the jig for suspending the basic concrete can surely hold the basic concrete block.

According to a fourth aspect of the present invention, there is provided the jig for suspending foundation concrete according to the first aspect, wherein, as shown in FIG. 4, a pair of wire hanging portions and a crane hook are lifted by a crane. The angle (A) between the two hanging wires (7, 7) to be connected is set to be 140 ° or more.

As described above, according to the fourth aspect of the present invention, the angle between the two hanging wires connecting the pair of wire hanging portions and the crane hook is 140 ° or more in the state of being lifted by the crane. Then, of the forces applied to the respective wires by lifting, the force in the horizontal direction increases. Thereby, the steel material having the wire suspension portion of the jig for suspending the foundation concrete is strongly pressed against the foundation concrete block, and the foundation concrete block can be more reliably held.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a jig for suspending foundation concrete according to the present invention will be described below with reference to FIGS. First, FIG. 1 is a top view of a jig for suspending foundation concrete. The jig 1 for hanging the foundation concrete
It is formed by assembling a bendable steel material 2, 2 and a steel material 3, 3 having wire suspension portions 4, 4 in a rectangular shape.
Here, two bendable steel materials 2 and 2 are assembled so as to face each other, and steel materials 3 and 3 having two wire suspension portions 4 and 4 are also assembled so as to face each other.

The bendable steel materials 2 and 2 are formed by connecting a steel material (angle steel) 2a and a steel material (angle steel) 2b with bolts 2d via a steel plate 2c provided outside the steel material 2a. The steel materials 2 and 2 are bent upward at the center (see FIG. 2). The steel materials 3, 3 have wire suspension portions 4, 4 formed of a steel plate at the center (see FIG. 3). The wire suspension portions 4 and 4 project upward from the steel materials 3 and 3, and the upper portion is bent toward the inside of the jig 1 for suspending the foundation concrete. Holes 5, 5, 5, and 5 are formed in the upper portions of the wire suspension portions 4, 4. Further, the steel materials 3, 3 are provided with plate rubbers 6, 6 inside.

The inner dimensions of the jig 1 for suspending the foundation concrete formed in a rectangular shape by the steel materials 2 and 2 and the steel materials 3 and 3 are as follows.
It is formed larger than the external shape of the foundation concrete block to be lifted.

Next, a method of lifting a foundation concrete block using the jig for suspending foundation concrete will be described with reference to FIG. First, the jig for hanging the foundation concrete 1
Hanging wires 7 in the holes 5 and 5 of the wire hanging portions 4 and 4
7 and hang it on a crane hook (not shown). The jig 1 for lifting the foundation concrete is lifted by a crane, and the jig 1 for lifting the foundation concrete is lowered from above the foundation concrete block 8 so that the foundation concrete block 8 passes through the jig 1 for foundation foundation concrete (FIG. 4).
(A)). Next, the steel materials 2 and 2 are bent so that both ends are raised, and the inside of the steel materials 3 and 3 is brought into contact with the upper part of the foundation concrete block 8. The angle A between the wire suspension portions 4, 4 and the suspension wires 7, 7 connecting the crane hooks is set to be 140 ° or more. The setting is performed by changing the length of the suspension wires 7, 7 or by changing the position of the hole 5 through which the suspension wires 7, 7 are passed. Angle A is 14
While maintaining the angle at 0 ° or more, the suspension wires 7, 7 are pulled up by a crane, and the foundation concrete block is lifted (FIG. 4B).

As described above, according to the jig for suspending foundation concrete of the above embodiment, the jig 1 for suspending foundation concrete having the suspension wires 7, 7 is passed from above the foundation concrete block 8, and the steel material 2 is suspended. , 2 can be connected to the foundation concrete block 8 and the suspension wires 7, 7, so that the lifting operation can be easily performed. In addition, since the rubber plates 6 and 6 are provided at the portions of the steel members 3 and 3 that abut against the basic concrete block 8, the basic concrete block 8 can be securely held and the basic concrete block 8 does not shift. It is possible to carry out lifting work safely. In addition, the angle A between the hanging wires 7
By raising the wire to 0 ° or more,
Since the horizontal force (inward of the foundation concrete hanging jig 1) applied to the wire suspension parts 4 and 4 can be increased, the foundation concrete block can be strongly sandwiched between the steel materials 3 and 3.

In the above embodiment, plate rubber is used as the elastic body. However, the present invention is not limited to this, and other shapes may be used as long as they are provided uniformly on steel. Rubber or resin may be used. Further, two holes are provided in the wire suspension portion, but three or more holes may be provided,
If the length of the suspension wire can be easily changed, 1
May be one. The shape of the wire hanging portion and the structure of the bent portion of the steel material are also arbitrary, and it goes without saying that the specific detailed structure and the like can be appropriately changed.

[0021]

As described above, according to the jig for suspending foundation concrete according to the first aspect of the present invention, a pair of opposed steel members of the jig for suspending foundation concrete passing through the foundation concrete block are bent. The inner dimension of the jig for hanging the foundation concrete is reduced, and the other pair of steel materials facing each other is pressed from both sides. With this, the jig for hanging the foundation concrete can be connected to the foundation concrete block, and by hanging the wire on the wire suspension,
The work of lifting the foundation concrete block can be easily performed.

According to the jig for suspending foundation concrete according to the second aspect of the present invention, the wire suspension is provided at substantially the center of each of the pair of steel members facing each other, so that the foundation concrete block can be lifted during lifting. The center of gravity can be easily taken, and the foundation concrete block can be safely lifted.

According to the jig for suspending foundation concrete according to the third aspect of the present invention, the elastic member is provided inside the steel member having the wire suspension member abutting on the foundation concrete block, so that the steel member is made of the foundation concrete block. And can securely hold the foundation concrete block.

According to the jig for suspending foundation concrete according to the fourth aspect of the present invention, as the angle between the two suspending wires connecting the wire suspending member and the crane hook increases, the wire can be lifted by the wire. The horizontal force applied to the steel material having the hanging portion increases. Therefore, the angle of the two suspension wires is set to 140 °
With the above, the steel material having the wire hanging portion can be pressed strongly against the foundation concrete block, and the foundation concrete block can be reliably held.

[Brief description of the drawings]

FIG. 1 is a top view showing the structure of a jig for hanging a foundation concrete as an example to which the present invention is applied.

FIG. 2 is a side view showing a structure of a bendable steel material of the jig for suspending foundation concrete in FIG.

FIG. 3 is a side view showing a structure of a steel material having a wire suspension portion of the jig for suspending foundation concrete in FIG. 1;

FIG. 4 is a view showing a method of lifting a foundation concrete block using the foundation concrete suspension jig in FIG. 1, wherein (a) shows a state in which the foundation concrete block is passed through the foundation concrete suspension jig; b) shows a state where the foundation concrete block is lifted by a wire.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Jig for suspending foundation concrete 2 Steel 2a, 2b Steel 2c Steel plate 2d bolt 3 Steel 4 Wire suspension 5 Hole 6 Rubber plate 7 Suspension wire 8 Foundation concrete block

Claims (4)

[Claims] Claims: 1. A jig for suspending a rectangular base concrete having an inner dimension larger than the outer shape of a base concrete block, the jig is formed into a rectangular shape by steel, and a pair of opposite steels is substantially formed at a central portion. A jig for suspending a foundation concrete, wherein the jig can be bent up and down, and the other pair of opposed steel materials has a wire suspending portion. 2. The jig for suspending a foundation concrete according to claim 1, wherein the wire suspending portion projects upward substantially at a central portion of the steel material. 3. The jig for suspending a foundation concrete according to claim 1, wherein an elastic body which comes into contact with the foundation concrete block is installed inside the steel material having the wire suspension portion. 4. An angle between two hanging wires connecting a pair of wire hanging portions and a crane hook in a state of being lifted by a crane is set to be 140 ° or more. Item 4. The jig for suspending foundation concrete according to Item 1.