JPH0249274Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a lifting and reversing jig for concrete products.

This type of lifting and reversing jig is used to lift concrete products used for side gutters and the like and turn them face up.

[Prior Art] Fig. 5 shows a conventional lifting and reversing jig, in which an inverted U-shaped insertion rod holder 2 has an insertion rod 1 at the bottom.
is inserted.

If the concrete product to be lifted and reversed has a bulge extending outwardly at the tips of both outer walls, the bulge does not interfere with the hanging material that supports the insertion rod holder 2. A plurality of spacers 18 are attached to the insertion rod 1 in this manner.

[Problem to be solved by the invention] However, the insertion rod 1 has a plurality of spacers 1.
8, the distance between the part on which a load acts when lifting and reversing a concrete product and the part that supports this load increases, so the bending moment generated in the insertion rod 1 increases.

For this reason, it is necessary to make the diameter of the insertion rod 1 larger than in the case where the spacer 18 is not attached, and accordingly, the diameter of the insertion rod drilled into the outer wall of the concrete product also becomes larger.

However, when the diameter of the insertion rod is increased, the strength of the outer wall decreases, which requires reinforcement, which increases manufacturing costs.

In addition, as the weight of concrete products increases, the diameter of the insertion rod must be increased, but there is a certain limit to the thickness due to the structure, and if the diameter of the insertion hole is made too thick, it will not be possible to insert it. Rod 1 may easily come off, which is dangerous.

The present invention was developed in view of the above-mentioned circumstances, and its purpose is to safely manufacture concrete products in which bulges protruding outward are formed at the tips of both outer walls without increasing the diameter of the insertion rod. It is an object of the present invention to provide a lifting and reversing jig that can smoothly perform lifting and reversing operations.

[Means for Solving the Problems] In order to achieve the above object, the lifting and reversing jig according to the present invention is configured as follows.

FIG. 1 shows the configuration of the lifting and reversing jig C.

A hanging rod 5 supported by a hanging tool is connected to a fixture 8, and the fixtures 8 are movably attached to both ends of the horizontal lifting member 7, respectively.

A chain-shaped connecting rod 11 is connected to the fixture 8, and a support main body 12 having a T-shaped cross section is connected to the connecting rod 11.

The support body 12 has bulges B formed at the tips of both outer walls 4 and 4 of the concrete product A.
A curved portion 15 is formed to curve outward along the support portion main body 12, and the insertion rod 1 is removably attached to the tip of the support portion main body 12.

[Example] Hereinafter, a preferred example of the lifting and reversing jig according to the present invention will be described based on the drawings.

FIG. 1 shows the overall structure of the lifting and reversing jig C.

The concrete product A to be lifted and inverted with the lifting and inversion jig C has a concave cross section, and both outer walls 4,
A bulging portion B extending outward is formed at the tip of each of the portions 4 .

Further, insertion holes 3, 3 are bored in the outer walls 4, 4 at approximately the center of gravity of the concrete product A.

This concrete product A is used for gutters, etc.
It is lifted and reversed by a lifting and reversing jig C from a state where it is laid down in an inverted U shape.

The lifting and reversing jig C is composed of a hanging rod 5, a horizontal lifting member 7, a fixture 8, a support body 12, an insertion rod 1, and the like.

A hook part 6 is attached to the center of the chain-shaped hanging rod 5, and the hook part 6 is connected to a hanging tool such as a crane.

The ends of the hanging rod 5 are connected to fixtures 8, 8 which are movably fitted into both ends of the horizontal lifting member 7.

Adjustment holes 9 for adjusting the attachment of fixtures 8 are bored at both ends of the hoisting horizontal member 7 at predetermined intervals.

A locking part 10 for locking the hanging rod 5 is formed at the upper part of the fixture 8, and a locking part 10 for locking the connecting rod 11 is formed at the lower part.

A connecting rod 11 connected to a locking part 10 at the lower part of the fixture 8 is formed of a chain, and a support body 12 is connected to the lower end of the connecting rod 11.

The support body 12 is formed with a curved part 15 that curves outward along the bulging part B of the concrete product A, and its cross section is formed into a T-shape in order to improve the strength.

Concrete product A is placed at the tip of the support body 12.
An insertion rod 1 inserted into an insertion hole 3 in the outer wall is detachably attached.

As shown in FIGS. 3 and 4, the support body 1
A through hole 13 is formed at the tip of 2, and the insertion rod 1 is attached to the through hole 13 via a sleeve 14 with a flange.

A retaining wheel 17 is fitted into the end of the sleeve 14, and the retaining wheel 17 includes the sleeve 14,
A locking bolt 16 passing through the insertion rod 1 is attached.

The lifting and reversing work of concrete product A using the lifting and reversing jig C will be briefly described below.

First, the insertion rods 1, 1 are inserted into the insertion holes 3, 3 bored in both outer walls 4, 4 of the concrete product A laid down in a U-shape.

At that time, the interval between the fixtures 8, 8 is adjusted according to the width of the concrete product A.

Then, a hanging tool such as a crane is attached to the hook part 6, and the lifting tool C is pulled up to lift and turn over the concrete product A.

As explained above, according to this embodiment, since the curved portion 15 that curves outward is formed on the support body 12, the bulge portion B that projects outward is formed on the outer wall 4.
Even if the concrete product A is formed in a concrete product A, the distance between the outer wall 4 and the tip of the support body 12 does not widen when the insertion rod 1 is inserted into the insertion hole 3.

Therefore, the bending moment acting on the insertion rod 1 is reduced compared to the conventional case.

Moreover, since the insertion rod 1 can be inserted deep into the insertion hole 3 of the concrete product A, the insertion rod 1 is difficult to come out.

Therefore, the work of lifting and reversing the concrete product A can be carried out safely without increasing the diameter of the insertion rod 1.

Moreover, since the support part main body 12 and the bulging part B do not interfere with each other when the concrete product A is turned over, the work can be carried out smoothly.

Furthermore, since the support body 12 is formed to have a T-shaped cross section, it has high strength and is lightweight.

In addition, the support body 12 is a chain-shaped connecting rod 1.
1, so insert the insertion rod 1,
Easy extraction operation.

Further, since the insertion rod 1 is detachably attached to the through hole 13 of the support body 12 via the sleeve 14, the diameter and length can be easily changed.

[Effects of the invention] As explained above, according to the invention, since the curved part that curves outward is formed on the support body, even if the concrete product has a bulging part formed on the outer wall, When the insertion rod is inserted, the distance between the outer wall and the tip of the support body does not widen, reducing the bending moment acting on the insertion rod, and since the insertion rod can be inserted deep, it becomes difficult to come out.

Therefore, it is possible to safely perform lifting and reversing work of concrete products without increasing the diameter of the insertion rod.

Furthermore, since the supporting part body and the bulging part do not interfere with each other when the concrete product is turned over, the work can be carried out smoothly.

Furthermore, since the support main body is formed to have a T-shaped cross section, it can have high strength and be lightweight.

Furthermore, since the support body is supported by a chain-shaped connecting rod, it is possible to easily insert and remove the insertion rod.

[Brief explanation of drawings]

Fig. 1 is a usage state diagram of the present invention, Fig. 2 is a side view of the support body, Figs. 3 and 4 are enlarged views of the H portion of Fig. 1, and Fig. 5 is an enlarged view of the main part showing the conventional example. Figure. A...Concrete product, B...Bulging part, C...
... Lifting and reversing jig, 1 ... Insert rod, 2 ... Insert rod holder, 3 ... Insert hole, 4 ... Outer wall, 5 ... Hanging rod, 6 ... Hook part, 7 ... ...Hoisting horizontal member, 8
... Fixture, 9 ... Adjustment hole, 10 ... Locking part, 1
DESCRIPTION OF SYMBOLS 1... Connection rod, 12... Support part main body, 13... Through hole, 14... Sleeve, 15... Curved part, 16
... retaining bolt, 17... retaining wheel, 18... spacer.

Claims (1)

[Scope of Claim for Utility Model Registration] A lifting and reversing jig C for a concrete product A having a generally concave cross section, in which bulging portions B protruding outward are formed at the tips of both outer walls 4, 4, respectively; The jig C includes a hanging rod 5 supported by a hanging tool, a fixture 8 that is movably attached to both ends of the horizontal lifting member 7 and to which the hanging rod 5 is connected, and a chain connected to the fixture 8. shaped connecting rod 11
A support body 12 connected to the connecting rod 11 and having a T-shaped cross section and formed with a curved portion 15 that curves outward along the bulge B; and a support body 12 removably attached to the tip of the support body 12. 1. A lifting and reversing jig for concrete products, characterized in that it has an insertion rod 1 which is inserted into the concrete product.