JPH04350225A - Hoisting method for side groove block - Google Patents

Abstract

PURPOSE:To wholly eliminate or halve the burying of bracket metals into a side wall face and disperse a hoist load over the whole length of a side groove block. CONSTITUTION:A pipe material 4 is inserted into the flow groove section 2 of a side groove block 1, and bracket metals 5 fixed to the pipe material 4 are protruded from the inflow opening section 3 of the side groove block 1. Hoisting members 7 are connected to the bracket metals 5.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for lifting gutter blocks used during transportation and installation work.

0002

2. Description of the Related Art In the conventional general gutter block hoisting method, receiving metal fittings are embedded and fixed in the side wall surfaces on both sides of the gutter block, and a lifting member of a material handling machine is connected to the receiving metal fittings. Gutter blocks are hoisted to the required height, transported, and installed.

[0003] When embedding and fixing the receiving metal fittings, the receiving metal fittings are held in a predetermined position on the reinforcing bar assembly so as not to be displaced when concrete material is poured, or they are held in a predetermined position within the formwork using appropriate auxiliary members. However, the work of holding this receiving metal fitting requires a considerable amount of time and effort, which hinders a reduction in the manufacturing cost of gutter blocks.

[0004] When a gutter block is lifted, a large lifting load is locally concentrated on the receiving metal fittings, which may cause cracks or chips in the concrete where the receiving metal fittings are embedded. In order to prevent this cracking and chipping, it is necessary to attach load dispersion members and reinforcing members such as anchor reinforcing bars and anchor fittings to the receiving metal fitting, but these bring about an increase in component costs.

[0005]

[Problems to be Solved by the Invention] Therefore, it is an object of the present invention to completely eliminate or halve the need for embedding of receiving metal fittings in the side wall surface, thereby making it possible to significantly reduce the manufacturing cost of blocks for side gutters, and to reduce the hanging load. To provide a method for lifting a block for a side gutter, in which cracking or chipping of concrete due to lifting does not occur since the concrete is distributed over the entire length of the block for the side gutter.

[0006]

[Means for Solving the Problems] Hereinafter, the method for lifting a gutter block according to the present invention will be explained using the reference numerals in the attached drawings. The pipe material 4 is inserted, the receiving metal fitting 5 fixed to the pipe material 4 is made to protrude from the inflow opening 3 of the gutter block, and the lifting member 7 is connected to the receiving metal fitting 5.

In the second invention, the pipe material 4 is inserted into the water passage groove 2 of the side gutter block 1, and the receiving metal fitting 5 fixed to the pipe material 4 is protruded from the inlet opening 3 of the side gutter block 1. Then, another receiving metal fitting 13 is fixed to one side wall surface 11 of the gutter block 1, and the lifting member 7 is connected to these receiving metal fittings 5, 13.

[0008]

[Operation] In the first invention, the receiving fitting 5 is arranged upward and aligned with the inflow opening 3, the pipe material 4 is inserted from one open end of the water passage groove 2, and the pipe material 4 is The entire length is stored in the water passage groove 3. A lifting member 7 is connected to the upper end of the receiving metal fitting 5 protruding from the inflow opening 3, and the lifting member 7 is pulled.

By this pulling, the upper part of the outer peripheral surface of the pipe material 4 comes into contact with the upper part of the inner peripheral surface of the water passage groove 2 located on both the left and right sides of the inflow opening 3, so that the side gutter block 1 is raised to the required height. It was hoisted from the factory's curing yard to the truck bed, and from the bed to the parts storage area at the construction site.
Alternatively, transportation work and installation work from the parts storage area to the installation site are performed.

After the transportation work is completed, the lifting member 7 is removed from the receiving metal fitting 5, and the pipe material 4 in the water passage groove 3 is extracted from the open end that has a free extraction space. After the installation work is completed, the lifting member 7 is removed from the receiving metal fitting 5, and the pipe material 4 is extracted from the open end on the opposite side of the existing block. After this removal, the pipe material 4 with the receiving metal fitting 5 is reused for transporting and installing the next gutter block 1.

In the second invention, the receiving fitting 5 is aligned with the inflow opening 3, the pipe material 4 is inserted from one open end of the water passage groove 2, and the pipe material 4 is inserted into the water passage groove 2. Store within 3. A receiving metal fitting 13 is fixed to one side wall surface 11. A lifting member 7 is attached to the receiving metal fitting 13 exposed on the side wall surface 11 and the receiving metal fitting 5 protruding from the inflow opening 3, and the lifting member 7 is pulled.

By this pulling, the upper part of the outer peripheral surface of the pipe material 4 comes into contact with the upper part of the inner peripheral surface of the water passage groove 2, as described above, so that the gutter block 1 is lifted to a required height and placed in the curing yard of the factory. Transport and installation work is carried out from the truck bed to the material storage area at the installation site, or from the material storage area to the installation site.

After the transportation work is completed, each lifting member 7 is removed from the receiving metal fitting 5 and the receiving metal fitting 13, and the pipe material 4 in the water passage groove 3 is extracted from the open end with a free space. . After the installation work is completed, each lifting member 7 is removed from the receiving metal fittings 5 and 13, and the pipe material 4 is extracted from the open end on the opposite side of the existing block, and the next gutter block 1 is transported and installed. reused.

[0014]

[Embodiment] In the embodiment shown in FIG.
is formed to have a square cross section, the water passage groove 2 is formed circularly at the center of the cross section, and the inflow opening 3 is formed in the water passage groove 2.
A thin groove is formed directly above the ridge, and the entire structure is symmetrical. The pipe material 4 is made of a round steel pipe with a diameter slightly smaller than that of the water passage groove 2.

The receiving metal fittings 5, which are used in two pieces at the front and the rear, are constituted by long eye bolts whose lower ends are welded to the outer surface of the pipe material 4. The upper end eye portion 6 of each receiving metal fitting 5 is arranged to be perpendicular to the axial direction of the pipe material 4. The lifting member 7 is a metal wire drawn out from a cargo handling machine such as a crane, and is connected to the receiving metal fitting 5 by inserting the lower end hook portion into the eye portion 6.

In the embodiment shown in FIG. 2, the pipe material 4 is made of a round steel tube, and the receiving metal fittings 5, which are used in the front and the rear, are made of long eye bolts whose lower ends are welded to the outer surface of the pipe material 4. There is. The upper end eye portion 6 of each receiving metal fitting 5 is arranged so as to be flat along the axial direction of the pipe material 4.

In the embodiment shown in FIG. 3, the pipe material 4 is made of a round steel tube. The receiving metal fittings 5, which are used in two pieces at the front and back, are made of steel rods bent in an inverted V shape, and are attached to the pipe material 4.
The left and right lower ends are welded to the pipe material 4 so as to be perpendicular to the axial direction of the pipe material. The lower end hook portion of the lifting member 7 is hooked onto the chevron-shaped upper end portion of the receiving metal fitting 5.

In the embodiment shown in FIG. 4, the pipe material 4 is made of a round steel tube. The two receiving metal fittings 9 used in the front and rear are made of twisted steel wires that are wrapped around the pipe material 1 in the circumferential direction and welded to the pipe material 4 at intermediate portions. The lower end hook portion of the lifting member 10 is hooked onto the chevron-shaped loop portion of the receiving metal fitting 5.

In the embodiment shown in FIG. 5, the side gutter block 1 is formed in an asymmetrical shape with a rising wall for the pedestrian and roadway boundary on the left side, and the water flow groove part 2 is formed in a circular shape slightly to the right of the center of the cross section. The inflow opening 3 is formed in the shape of a narrow groove at the root of the rising wall. The pipe material 4 is made of a round steel pipe with a diameter slightly smaller than that of the water passage groove 2.

The receiving metal fittings 5, which are used in two pieces at the front and the rear, are constituted by long eye bolts whose lower ends are welded to the outer surface of the pipe material 4. The upper end eye portion of each receiving metal fitting 5 is arranged to be perpendicular to the axial direction of the pipe material 4. Two nut-shaped inserts 12, front and rear, are embedded and fixed in the center of the side wall surface 11 on the side where the rising wall portion is located, and a bolt-shaped receiving fitting 13 is screwed and fixed to the nut-shaped inserts 12.

The lifting member 7 is made of twisted steel wire, and the hook portion at one end is inserted into the eye portion of the receiving metal fitting 5, and the loop portion at the other end is hooked onto the head portion of the receiving metal fitting 13. . A lower end hook portion of a main wire 10 let out from a cargo handling machine such as a crane is hooked onto the bent central portion of the lifting member 7.

In the embodiment shown in FIG. 6, the side gutter block 1 is formed asymmetrically, the water passage groove 2 is formed in a circular shape slightly to the right of the center of the cross section, and the inflow opening 3 is formed in an upright manner. A narrow groove is formed at the root of the wall. The pipe material 4 is made of a round steel pipe with a diameter slightly smaller than that of the water passage groove 2. The two receiving fittings 5, front and rear, are made of steel rods bent in an inverted V shape, aligned in the axial direction of the pipe material 4, and welded to the pipe material 4 at the lower end portions on the left and right.

In the embodiment shown in FIG. 7, the side gutter block 1 has a square cross section, the water passage groove 2 is square in the center of the cross section, and the inlet opening 3 has a square cross section. It is formed in a narrow groove shape so as to communicate with the center part of the upper surface of the groove part 2,
The whole structure is symmetrical. The pipe material 4 is composed of a rectangular steel pipe whose size is slightly smaller than that of the water passage groove 2. The receiving metal fittings 5, which are used in two pieces at the front and the rear, are constituted by long eye bolts whose lower ends are welded to the outer surface of the pipe material 4. The upper end eye portion 6 of the receiving fitting 5 is arranged so as to be flat along the axial direction of the pipe material 4.

In the embodiment shown in FIG. 8, the side gutter block 1 has a square cross section, the water passage groove 2 is square in the center of the cross section, and the inlet opening 3 has a square cross section. It is formed in a narrow groove shape so as to communicate with the center part of the upper surface of the groove part 2,
The whole structure is symmetrical. The pipe material 4 is made of a round steel tube with an outer diameter slightly smaller than that of the water passage groove 2. The lower end of the receiving metal fitting 5, which uses two pieces in the front and the back, is attached to the pipe material 4.
Consists of a chief eye bolt welded to the outside surface of the The upper end eye portion 6 of the receiving fitting 5 is arranged in a direction perpendicular to the axial direction of the pipe material 4.

[0025]

Effects of the Invention As described above, in the lifting method of the first invention, the pipe material 4 to which the receiving metal fitting 5 is fixed is inserted into the water passage groove 2 of the side gutter block 1, and Since the lifting member 7 is connected to the protruding receiving metal fitting 5, it is possible to completely eliminate the need for a receiving metal fitting to be embedded and fixed in the side wall surface of the gutter block 1, and the time and effort required for embedding and fixing the receiving metal fitting can be completely eliminated. Gutter block 1
The production cost can be significantly reduced.

In the second invention, the pipe material 4 to which the receiving fitting 5 is fixed is inserted into the water passage groove 2 of the gutter block 1, and the lifting member is attached to the receiving fitting 5 protruding from the inflow opening 3. 7 and connect side wall surface 1 on one side of gutter block 1.
Since the lifting member 7 is connected to the receiving metal fitting 13 fixed to the gutter block 1, the number of receiving metal fittings to be embedded and fixed in the side wall surface of the gutter block 1 can be reduced by half, and the time and effort required for embedding and fixing the receiving metal fittings can be reduced by half. By omitting half of them, the manufacturing cost of the gutter block 1 can be reduced.

In both the first invention and the second invention, a new process of preparing the pipe material 4 and fixing the receiving metal fitting 5 to the pipe material 4 is required. 4 is used repeatedly, so the cost is significantly reduced compared to embedding and fixing at least four receiving metal fittings per gutter block into all gutter blocks.

In the first invention, since the upper part of the outer circumferential surface of the pipe material 4 comes into contact with the upper part of the inner circumferential surface of the water passage groove 2, the entire hanging load of the gutter block 1 is distributed over the entire length of the gutter block 1. Since stress is not locally concentrated, there is no possibility of cracks or chips in the concrete due to lifting, and transportation and installation can be carried out safely without damage.

In the second invention, the upper part of the outer circumferential surface of the pipe material 4 comes into contact with the upper part of the inner circumferential surface of the water passage groove 2, and the majority of the hanging load of the gutter block 1 is distributed and supported over the entire length. The hanging load acting on the receiving metal fitting 13 fixed to the side wall surface 11 of the housing can be reduced, and there is no fear of cracking or chipping due to stress concentration. Therefore, the gutter block 1 can be safely transported and installed without damage.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a gutter block in a lifted state, showing an embodiment of the method of the present invention.

FIG. 2 is a perspective view of a pipe material with a receiving fitting used in another embodiment of the method of the present invention.

FIG. 3 is a perspective view of a pipe material with a receiving fitting used in yet another embodiment of the method of the present invention.

FIG. 4 is a perspective view of a pipe material with a receiving fitting used in another embodiment of the method of the present invention.

FIG. 5 is a cross-sectional view of a gutter block in a lifted state, showing still another embodiment of the method of the present invention.

FIG. 6 is a perspective view of a gutter block showing another embodiment of the method of the present invention.

FIG. 7 is a perspective view of a gutter block showing still another embodiment of the method of the present invention.

FIG. 8 is a perspective view of a gutter block showing still another embodiment of the method of the present invention.

[Explanation of symbols]

1 Gutter block 2 Water flow groove 3 Inflow opening 4 Pipe material 5 Receiving metal fittings 6 Upper end eye part 7 Lifting member 8 Receiving metal fittings 9 Receiving metal fittings 10 Main wire 11 Side wall surface 12 Nut type insert 13 Receiving metal fittings 14 Receiving metal fittings

Claims (2)

[Claims] Claim 1: A pipe material is inserted into a water passage groove of a gutter block, a receiving metal fitting fixed to the pipe material is made to protrude from an inflow opening of the gutter block, and a lifting member is connected to the receiving metal fitting. How to lift gutter blocks. 2. A pipe material is inserted into the water flow groove of the gutter block, and a receiving metal fitting fixed to the pipe material is made to protrude from the inlet opening of the gutter block, and is attached to one side wall surface of the gutter block. A method for lifting gutter blocks in which separate receiving metal fittings are fixed and a lifting member is connected to these receiving metal fittings.