JPH11210165A - Jig for reinforcement joint sleeve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jig for a reinforcement joint sleeve, suited for use with a vertically driven PC member, and capable of being easily mounted on a form without the need to lift the form even if a space below the form is small. SOLUTION: This jig comprises a main body 10 fitted into a reinforcement joint sleeve and having a truncated-cone-shaped upper portion, a sealing plate 13 placed between the main body and the inner bottom surface of a form 20, a bolt 11 projecting from the main body and passing through bolt holes 17, 18 in the sealing pate and the form, respectively, and a nut 12 fitted around the bolt to fasten the main body and the sealing plate to the form. The nut 12 is welded to the outer bottom surface of the form 20 around the bolt hole 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig used for attaching a rebar joint sleeve to a formwork of a PC member, and more particularly to a jig suitable for a vertically-struck PC member.

[0002]

2. Description of the Related Art A jig for a reinforcing joint sleeve used for a vertically-struck PC member is known from Japanese Patent Application Laid-Open No. Hei 8-216145. This known jig includes a main body having a truncated conical tip that fits inside a rebar insertion opening of a rebar joint sleeve, a bolt protruding from the bottom surface of the main body and penetrating a mold, and tightening the main body to the mold using the bolt. It consisted of a nut to be fixed and a highly elastic seal plate installed between the main body and the mold.

[0003]

When the PC member is vertically struck, a jig body is set up on the inner bottom surface of the mold, and bolts of the jig penetrate through the inner bottom surface of the mold to protrude. A jig body is fastened and fixed by applying a nut to a portion of the bolt projecting from the outer bottom surface of the mold. However, if the space below the formwork is too narrow to be accessible, the nut cannot be bolted and tightened. Therefore, a work of lifting the formwork with a crane is required, and a problem occurs that extra labor and time are required.

SUMMARY OF THE INVENTION An object of the present invention is to solve this problem. It is an object of the present invention to provide a body having a truncated conical tip which fits inside a rebar insertion opening of a rebar joint sleeve, a body and a formwork. A jig consisting of a seal plate disposed between the inner bottom surfaces of the mold and a bolt and a nut for fixing the main body of the main body together with the seal plate to the inner bottom surface of the formwork without having to put a hand under the formwork. An object of the present invention is to provide a bolt capable of fastening a nut.

[0005]

In order to achieve the above object, the present invention employs a main body having a truncated cone shape and a seal plate disposed between the main body and the inner bottom surface of a mold. In a jig comprising a bolt and a nut for fixing the main body and the seal plate to the mold, the nut is welded to an outer bottom surface around a bolt through hole of the mold.

[0006] The bolt may be integral with the main body or separate from the main body. When the bolt and the main body are separated, a through hole for the bolt is provided in the main body. When the bolt protruding from the lower surface of the main body is passed through the bolt through hole of the seal plate and then through the through hole of the formwork, the tip naturally fits into the nut. Next, the head of the bolt is turned on a bolt separate from the main body in a direction in which the main body is screwed into a bolt integrated with the main body, and the main body and the sealing plate are fastened and fixed to the mold. Since the work of fastening the jig to the mold is performed from the inside of the mold, it is not related to the size of the gap below the mold. Therefore, even if the space below the form is narrow, it is not necessary to lift the form with a crane to attach the rebar joint sleeve to the form.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A jig according to the present invention will be described based on an embodiment shown in the drawings. As shown in FIG. 1, a jig is composed of a metal body 10 and a bolt 11 penetrating through the axis of the body.
A nut 12 screwed into the bolt, and a main body 10
Rubber seal plate 1 disposed between the mold and the inner bottom surface of the mold 20
3

The body 10 has a truncated conical upper half and a cylindrical lower half. The main body 10 has a bolt hole 16 having a smaller diameter than the head 14 of the bolt 11 and a slightly larger diameter than the screw portion 15, and the bolt hole passes through the axis of the main body 10. The seal plate 13 has a bolt hole 17 having substantially the same diameter as the bolt hole 16 of the main body 10 in the center. The mold 20 has a bolt hole 18 at a position where the jig is erected. The bolt hole 18 has substantially the same diameter as the bolt hole 16 of the main body 10. The nut 12 is welded in advance to an outer bottom surface 19 around each bolt hole 18 of the mold 20. The main body 10 and the bolt holes 16, 1,
When the bolt 7 is aligned with the bolt hole 18 of the mold 20 and the bolt 11 is inserted from above into the bolt hole, the tip of the threaded portion 15 of the bolt 11 naturally fits into the nut 12.
Then, when the head 14 of the bolt 11 is turned in the screwing direction, the bolt 11 is screwed into the nut 12 fixed to the mold 20, and as shown in FIG.
Then, it is fastened and fixed to the formwork 20 by bolts 11 and nuts 12.

[0009] Since this jig mounting work is entirely performed inside the formwork 20 and is not related to the size of the space below the formwork 20, even if the space below the formwork 20 is small, There is no need to lift the formwork with a crane to attach the jig to the formwork. Therefore, the mounting work of the jig is easy, and the time is greatly reduced. In addition, since it is not necessary to prepare a crane for mounting the jig, facility costs are reduced, and danger due to lifting the formwork is eliminated, so that work safety is improved.

[0010]

In the embodiment shown in FIG. 3, the main body and the bolt are formed integrally, and the bolt 11 projects from the center of the lower surface of the main body 10. The upper half surface of the main body is frusto-conical, and a corner portion 19 for hanging a spanner is formed on the top. The configuration other than the above is the same as that of the embodiment.

The bolt 11 is inserted into the bolt hole 17 of the seal plate 13.
Into the bolt hole 18 of the formwork 20 and the bolt 1
The tip of 1 naturally fits into the nut 12. Next, a wrench is hung on the top corner 19 of the main body 10, the main body 10 is turned, the bolt 11 is screwed into the nut 12, and the main body 10 and the sealing plate 13 are fastened and fixed to the form 20. Since this jig mounting operation is performed only inside the formwork 20, there is no need to lift the formwork with a crane.

[0012]

As described above, the jig of the present invention is different from the conventional method in which a nut is put on a bolt protruding from the outer bottom surface of a mold and the nut is turned to fix the same. Since the bolts are inserted into the nuts welded to the bottom surface and the bolts are turned from the inside of the formwork and fixed, even if the space under the formwork is narrow, the formwork can be repaired without lifting it with a crane. The jig can be fixed to the formwork, and the jig can be quickly and safely mounted.

[Brief description of the drawings]

FIG. 1 is an exploded view showing a jig according to an embodiment of the present invention;

FIG. 2 is a diagram showing a state in which the jig of FIG. 1 is attached to a mold;

FIG. 3 is an exploded view of another embodiment;

[Explanation of symbols]

 10: Main body 11: Bolt 12: Nut 13: Seal plate 14: Head 15: Screw part 16, 17, 18: Bolt hole 19: Corner 20: Formwork

Claims (3)

[Claims] 1. A body (10) having a truncated-cone-shaped upper portion fitted inside a rebar joint sleeve, a sealing plate (13) arranged between the body and the inner bottom surface of a formwork (20), Bolt holes (1) protruding from the main body of the seal plate and the formwork
7, 18), and a nut (12) which is screwed with the bolt to fasten the main body and the seal plate to the formwork and fix the nut to the formwork. A jig for a rebar joint sleeve, which is welded to an outer bottom surface around a bolt hole. 2. A bolt hole (1) which is formed separately from the main body and the bolt (11) and penetrates the main body through an axis thereof.
The jig for a reinforcing joint sleeve according to claim 1, wherein 6) is drilled, and the threaded portion (15) of the bolt hole is passed through the bolt hole. 3. The body is formed integrally with the bolt,
The jig for a rebar joint sleeve according to claim 1, wherein a corner (19) for hanging a spanner is formed on the top of the main body.