JPH0734109Y2 - Reinforcing joint sleeve fixing jig - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing bar joint sleeve fixing jig used for disposing a sleeve of a reinforcing bar joint inside a precast concrete plate (hereinafter referred to as "PC plate").

[0002]

2. Description of the Related Art A sleeve of a reinforcing bar joint arranged inside a PC board is arranged such that one opening thereof is located at the lower end surface of the PC board. And PC in the sleeve
A joint reinforcing bar having a length substantially equal to the height of the plate is arranged such that one end thereof is located substantially in the center of the sleeve and the other end thereof projects from the upper end surface of the PC plate. In some cases, fit the opening of the sleeve at the lower end of the other PC board to the reinforcing bar protruding above the PC board installed vertically.
After that, the upper and lower PC plates are joined by injecting grout into the sleeve.

When the sleeve of the reinforcing bar joint is arranged in the PC plate, a fixing jig for fixing the sleeve to the molding frame of the PC plate (hereinafter referred to as "reinforcing bar joint sleeve fixing jig"). It has been used conventionally. As shown in FIG. 4, a fixing jig of this type conventionally includes an insertion rod 1 having a retaining portion 1A at one end, an elastic cylindrical portion 2A fitted in a sleeve, a sleeve and a mold. A sleeve supporting member 2 consisting of a circular truncated cone portion 2B made of metal interposed between the sleeve and the other end male screw portion 1B of the insertion rod 1 extending through the supporting member and the mold. It is constituted by a nut 6 as a fixing means for pulling and fixing it in one direction, and by screwing the nut 6, the insertion rod 1 is moved leftward and the cylindrical portion 2A is expanded and deformed and fixed to the sleeve. I am able to do it.

Further, by providing the truncated cone portion 2B, the lower opening of the sleeve can be arranged above the lower end surface of the PC board, and the outer opening is inserted between the opening of the sleeve and the lower end surface of the PC board. A hole can be provided, thereby facilitating the insertion of the joint reinforcing bar into the sleeve during erection, and further disposing the reinforcing reinforcing bar arranged at the lower end of the PC plate below the sleeve, Therefore, it is possible to dispose the sleeve inside the outer diameter of the sleeve, and it is possible to secure a sufficient cover thickness.

When a PC plate is manufactured using a conventional rebar joint sleeve fixing jig, after the sleeve is fixed to the mold using this fixing jig and the concrete is placed in the mold. The fixing jig is removed from the mold together with the mold, and the grout is injected into the space formed in the sleeve after the mold is removed as described above.

[0006]

However, in the conventional rebar joint sleeve fixing jig, since the truncated cone portion 2B, which is a member for providing a hole for inserting a joint rebar in the end surface of the PC plate, is a metal fitting, There is a problem that it is heavy and difficult to handle, and it is difficult to remove the mold after placing it on concrete, resulting in poor workability. Moreover, the conventional rebar joint sleeve fixing jig is composed of the cylindrical portion 2A made of an elastic body and a metal fitting. However, there is a problem that parts management is complicated because there is no choice but to manage the truncated cone part 2B separately.

The present invention has been made in order to solve the above problems, and in the production of a PC board, it can be easily demolded after placing concrete, and is excellent in handling and parts management. It is an object of the present invention to provide a rebar joint sleeve fixing jig.

[0008]

According to the present invention, an insertion rod having a retaining portion at one end is provided so as to penetrate a sleeve support member, and the support member is provided in a rebar joint sleeve provided in a formwork of precast concrete material. In the rebar joint sleeve fixing jig, which is fitted and inserted, and at the other end of the insertion rod extending through the mold, pulling the fixing rod outward to fix the same, the supporting member is A cylindrical portion located inside the sleeve, and a truncated cone portion interposed between the sleeve and the mold and having a diameter gradually increased toward the mold side. The cylindrical portion and the truncated cone And the parts are formed as hard plastic members integrally formed with each other.

[0009]

[Operation] According to the rebar joint sleeve fixing jig of the present invention,
After inserting an insertion rod having a stopper at one end through the sleeve support member, the other end of the insertion rod is formed at a predetermined position of the mold with the cylindrical portion of the support member inserted into the rebar joint sleeve. When the insertion rod is pulled by operating the fixing means from the outside of the mold while inserting it through the hole formed in the frame, the truncated cone part of the supporting member is inserted between the sleeve and the frame and fitted into the sleeve. The sleeve can be fixed to the mold together with the attached cylindrical part.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in FIGS.

The rebar joint sleeve fixing jig of this embodiment is
As shown in FIG. 1, an insertion rod 1 having a retaining portion 1A at one end is provided so as to penetrate a supporting member 2, and the supporting member 2 is provided in a frame 3 of a precast concrete plate (not shown). At the other end of the insertion rod 1 which is inserted into the joint sleeve 5 and extends through the mold 3, a fixing means 6 for pulling and fixing the insertion rod 1 to the outside of the mold 3 is provided. It is configured.

The bearing member 2 is formed integrally with the cylindrical portion 2A located inside the sleeve 5, and is interposed between the sleeve 5 and the mold 3. A circular truncated cone portion 2B, which is formed by gradually expanding the diameter of the circular truncated cone portion 2B from the sleeve 5 toward the mold 3 and the cylindrical tubular portion 2A as described later.
The sleeve 5 is tightly fitted to the inner surface of the so as not to come off, and the truncated cone portion 2B is configured to form the insertion hole of the joint rebar of the PC plate as described above. Further, the support member 2 is integrally formed of a hard plastic member such as rubber or synthetic resin, and a shaft hole 2c is formed so as to extend along the shaft center of the support member 2. The insertion rod 1 has the shaft hole 2c. It is designed to penetrate.

Further, the insertion rod 1 penetrating the shaft hole 2c of the support member 2 has the retaining portion 1A formed at one end thereof locked at one end of the cylindrical portion 2A, and the other end thereof is conical. It is formed to have a length that protrudes from the base 2B and extends through the hole 3A of the mold 3, and the fixing means 6 is attached to the other end. As shown in FIG. 1, the fixing means 6 is detachably pivotally supported by the insertion rod 1 and is attached to the cam 6A capable of engaging with the mold 3 to rotate the cam 6A. It is configured to include an insertion portion 6B into which an operation rod to be operated is inserted. Therefore, with the cylindrical portion 2A of the elastic body 2 mounted on the insertion rod 1 fitted into one end of the sleeve 5, the other end of the insertion rod 1 is connected to the mold 3 as shown in FIG. When the cam 6A is attached to the other end of the insertion rod 1 by pin connection from the outside of the mold 3 and the cam 6A is rotated by the operating rod, the cam 6A engages with the mold 3. Meanwhile, the insertion rod 1 is configured to be pulled outward.

Therefore, when the sleeve 5 is fixed to the mold 3 using the reinforcing bar joint sleeve fixing jig of this embodiment,
First, after inserting the insertion rod 1 through the support member 2 to mount the support member 2 on the insertion rod 1, the other end of the insertion rod 1 is inserted with the cylindrical portion 2A of the support member 2 inserted into the sleeve 5. The mold 3 is inserted into the hole 3A. Then, a cam 6A is attached to the other end of the insertion rod 1 from the outside of the mold 3, the operation rod is inserted into the insertion portion 6B, and the operation rod is rotated to move the cam 5A.
When the insertion rod 1 is pulled outward while being engaged with the mold 3, the circular cylinder with the truncated cone portion 2B of the elastic body 2 interposed between the sleeve 5 and the mold 3 as shown in FIG. The sleeve 5 can be fixed to the mold 3 together with the shaped portion 2A. Needless to say, as the fixing means 6, not only the cam 6A described above but also a nut as shown in FIG. 4 may be used.

As described above, the sleeve 5 is fixed to the form 3, the rebar 4 is inserted into the other end of the sleeve 5 from the opposite side of the form 3, and the cap 7 is passed through the rebar 4 to form the sleeve 5. By covering the other end with the cap 7 and fixing the rebar 4 to the other end of the sleeve 6, it is possible to prevent the rebar 4 inserted from the opposite side of the form 3 from swinging,
The reinforcing bars 4 can be stabilized when concrete is poured into the formwork 3.

As described above, according to the rebar joint sleeve fixing jig of the present embodiment, the joint rebar insertion hole is interposed between the bearing member 2 fitted in the sleeve 5, the sleeve 5 and the mold 3. Since the frusto-conical portion 2B that forms the above is integrally formed by a hard plastic member, the reinforcing bar joint sleeve fixing jig can be easily removed from the concrete after placing the concrete in the production of the PC plate, and It is possible to provide a product that is easy to handle at the time of work, is easy to manage the parts, and is excellent in convenience.

FIG. 3 is a view showing another embodiment of the present invention. The reinforcing bar joint sleeve fixing jig of this embodiment is composed of an insertion rod 1
Of the above embodiment except that the retaining portion 1A at one end is embedded in the support member 2 and the male screw portion 1B into which the nut 6 of the fixing means is screwed is formed at the other end. It is configured according to.

Therefore, when the sleeve 5 is fixed to the form 3 using the reinforcing bar joint sleeve fixing jig of this embodiment,
With the cylindrical portion 2A of the support member 2 attached to the insertion rod 1 fitted and inserted in the sleeve 5, the other end of the insertion rod 1 is passed through the hole 3A of the mold 3 to When the nut 6 is screwed onto the male screw 1B of the insertion rod 1 from the outside and the insertion rod 1 is pulled to the outside of the mold 3, the cylindrical portion 2A of the elastic body 2 comes into close contact with the sleeve 5 as described above. The sleeve 5 can be fixed to the frame 3. Therefore, the reinforcing bar joint sleeve fixing jig of this embodiment can also achieve the same effects as those of the above embodiment.

[0019]

As described above, according to the jig for fixing the rebar joint sleeve of the present invention, it is possible to easily remove the mold after placing concrete in manufacturing the PC board, and it is excellent in the handling and management of parts. A fixed jig can be obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state in which a sleeve is fixed to a form at the time of manufacturing a PC board using a reinforcing bar joint sleeve fixing jig according to an embodiment of the present invention.

2 is a view corresponding to FIG. 1 showing a state in which a cam of the reinforcing bar joint sleeve fixing jig shown in FIG. 1 is rotated to pull the insertion rod outward of the mold to fix the sleeve to the mold. Is.

FIG. 3 is a sectional view showing a main part of a reinforcing bar joint sleeve fixing jig according to another embodiment of the present invention.

FIG. 4 is a sectional view of an essential part of a reinforcing bar joint sleeve fixing jig showing a conventional example of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insertion rod 1A Retaining part 1B Male screw part 2 Support member 2A Cylindrical part 2B Frustum part 3 Form frame 5 Sleeve 6 Nut (fixing means) 6A Cam (fixing means)

Claims (2)

[Scope of utility model registration request] 1. An insert rod having a retaining portion at one end is provided so as to penetrate through a sleeve support member, and the support member is fitted and inserted into a rebar joint sleeve provided in a formwork of a precast concrete material, and the formwork is also provided. In a rebar joint sleeve fixing jig having a fixing means for pulling and fixing the insertion rod to the outside of the formwork at the other end of the insertion rod extending through the support rod, the support member is a cylinder located in the sleeve. And a truncated cone portion that is interposed between the sleeve and the mold and has a diameter that gradually increases toward the mold side. The cylindrical portion and the truncated cone portion are integrally formed with each other. A reinforcing bar joint sleeve fixing jig formed as a hard plastic member. 2. A jig for fixing a reinforcing bar joint sleeve, wherein the retaining portion of the insertion rod is embedded in the integrated plastic member.