JPH0611316Y2 - Stopper for stopping formwork - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of the Invention The present invention relates to a peripheral formwork or a bed for producing a PC plate such as a wall or a slab, or a reinforcing bar in a through hole formed in a metal foam for cast-in-place concrete. The present invention relates to a stopper for preventing slag from leaking through the through hole from the gap between the reinforcing bar and the concrete when the concrete is inserted therethrough.

Conventional technology Conventionally, when a through hole is made in a peripheral formwork, bed or metal foam, etc., and a reinforcing bar is inserted through this and when concrete is placed, it is easy to insert the reinforcing bar when arranging it and pull it out when demolding. In order to achieve the above, the through hole is made slightly larger than the outer diameter of the reinforcing bar, and there is a play (gap) between them.

Therefore, when pouring concrete, the slag of concrete leaks from this gap, which reduces the adhesion performance of the reinforcing bars and also reduces the welding performance due to the inclusion of slag during welding. Instead, it took time to clean the slag to prevent it from getting caught. In addition, it was difficult to remove the mold from the mold due to leakage. Further, since the through hole is large, the reinforcing bar cannot be held at a correct position.

Therefore, in order to prevent this kind of spillage, or to hold the reinforcing bar in an accurate position, the play of the through hole cannot be made large, and the reinforcing bar (particularly deformed reinforcing bar), the form, and the bed can be removed during demolding. It was difficult to remove the mold because of the tight fit.

The present invention has been made in order to solve the above-mentioned problems, and the purpose thereof is a formwork capable of completely preventing leakage of slag, and capable of accurately arranging reinforcing bars. The purpose of this is to provide a stopper for preventing slag.

Means for Solving the Problems The stopper for locking the mold of the present invention is a peripheral formwork having a through hole for inserting a reinforcing bar, a mold such as a bed or metal foam, and the through hole is The receiving jig is fixed to the side surface of the form and elastically contracted so that the central axis of the through hole and the central axis of the sleeve-shaped receiving jig are formed substantially larger than the outer diameter. A ring-shaped elastic jig is inserted into the receiving jig in a press-fitted state, and the hole of the elastic jig is formed to be slightly smaller than the outer diameter of the reinforcing bar.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is a peripheral form, a form such as a bed or a metal foam, and a through hole 1a for inserting an end portion of a reinforcing bar is opened. The through hole 1a is made sufficiently larger than the outer diameter of the reinforcing bar.

Reference numeral 2 denotes a steel receiving jig, which is formed in a sleeve shape as illustrated in FIG. 2 and is provided on the side surface of the mold 1 so that its central axis coincides with the central axis of the through hole 1a. Welded 3

Reference numeral 4 denotes an elastic jig made of rubber, which is formed in a link shape having a cut 4 as shown in FIG. 3, and has an outer diameter of such a size that it can be fitted into the receiving jig 2 in a press-fitted state. The inner diameter is slightly smaller than the outer diameter of the reinforcing bar so that the reinforcing bar can be inserted in a press-fitted state.

As shown in FIG. 4, when the reinforcing bar S is inserted into the stopper having the above-described structure and the concrete C is placed,
Since the space between the elastic jig 4 and the reinforcing bar S is kept in a compacted state, leakage of slag is completely prevented.

At the time of demolding, the elastic jig 4 can be taken off together with the reinforcing bar S, the through hole 1a of the mold 1 is sufficiently large and is not clogged up. Therefore, the rebar S can be taken out without difficulty, and therefore demolding is very easy. Not only can it be carried out, but since no slag is attached to the reinforcing bar, it is possible to prevent a decrease in adhesive strength and the inclusion of slag during welding.

Advantages of the Invention 1) Since there is no need to worry about sloping stop processing in the through hole of the form, processing of the through hole is easy.

2) Since no slag adheres to the reinforcing bar, it is possible to secure the adhesive strength of concrete, prevent the slag from being caught during the welding of the reinforcing bar, and further, the cleaning of the reinforcing bar is unnecessary.

3) Easy demolding.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a half sectional perspective view of a receiving jig, FIG. 3 is a perspective view of an elastic jig, and FIG. 4 is a sectional view showing a construction state. is there. 1 ... Formwork, 1a ... Through hole, 2 ... Receiving jig, 3 ... Spot welding, 4 ... Elastic jig, 4a ... Break, C ... Concrete, S ... Reinforcing bar.

Claims (1)

[Scope of utility model registration request] 1. In a peripheral form or bed for producing a PC plate such as a wall or a slab, or in a form such as a metal foam for cast-in-place concrete in which a through hole for inserting a reinforcing bar is formed. , The through hole is formed sufficiently larger than the outer diameter of the reinforcing bar, and the receiving jig is fixed to the side surface of the mold so that the central axis of the through hole and the central axis of the sleeve-shaped receiving jig are substantially aligned with each other. And a ring-shaped elastic jig that contracts elastically is inserted into the receiving jig in a press-fitted state, and the hole of the elastic jig is formed to be slightly smaller than the outer diameter of the reinforcing bar. Stopper for stopping slag.