JP2002349064A - Form fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate an inconvenience that leaving a form fixture used on the lower ends of forms buried in a concrete because of the difficulty of removing the form fixture from the inside of the concrete results in breakage of the concrete by the rusted form fixture when a steel form fixture is employed for determining the width between forms upon manufacturing a concrete continuous footing by filling up concrete. SOLUTION: Connections to form flanges, which are provided on both ends of the form fixture, are made of hard synthetic resin. On the extremity of the connections, erect strips erecting in the same direction are provided, respectively, and a recession for receiving the front end of the form flange is formed inside each erect strip.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold fixing device. More particularly, the present invention relates to a formwork fixing device for maintaining a predetermined length between formworks when casting concrete to make a fabric foundation.

[0002]

2. Description of the Related Art Generally, when building a house, for example, a wooden house, a cloth foundation is first made. The fabric foundation is made by pouring concrete between two fixed formwork, generally called panels, fixed in parallel and removing the formwork after the concrete has hardened. Therefore, forming a fabric foundation requires a formwork and a formwork fixture for fixing the formwork in parallel.

[0003] The formwork fixing device is provided not only at the upper end of the formwork but also at the lower end of the formwork. The fixture attached to the upper end of the formwork can be removed together with the formwork after the concrete has hardened, but the fixture attached to the lower end of the formwork is embedded in the concrete at its center. It cannot be removed. Therefore, the fixture attached to the lower end of the formwork is left as it is in the cloth foundation, and is left with both ends protruding from the cloth foundation.

[0004] Formwork fixtures are usually made of iron.
The shape is such that it has a length that spans two molds extending in parallel, and is provided with connection portions to flanges formed on the edges of the mold at both ends in the length direction.

A typical example of a formwork fixture made of iron is shown in FIG. The fixture A shown in FIG.
Using a strip-shaped iron plate as a material, cut both ends in the length direction from both sides to form an E-shaped end at each end, and make a U-shaped cut away from the end, and further,
The ends and the cut portions are erected in the same direction to form outer erected pieces 1 and 11 and inner erected pieces 2 and 21, respectively. In the formwork fixture A, the portion from the inner upright piece 2 to the outer upright piece 1 is a portion that contacts the formwork flange.

The fixture A is used, for example, as shown in FIG. First, the fixture A is laid under the ground, and the flange of the iron formwork B is fitted between the outer standing piece 1 and the inner standing piece 2. Next, the T-shaped portion at the tip of the outer standing piece 1 is bent toward the mold B, so that the tip of the flange of the mold B is sandwiched by the T-shaped portion. Thus, the fixture A is fixed to the lower end of the mold B. Similarly, at the other end of the fixture A, the lower end of the form C is fixed by the outer upright piece 11 and the inner upright piece 21.

Thereafter, concrete is poured between the molds B and C. At this time, the fixture A is embedded in the concrete at the center. After hardening of concrete, formwork B
When the fixtures A and C are removed, the fixture A is left in the concrete in a state where the tip of the fixture that has been in contact with the form flange, that is, the inner standing pieces 2 and 21 is made to protrude from the concrete. Heretofore, it was thought that there would be no hindrance even if the fixing tool was left in such a state.

[0008]

The present inventor has found that if the fixture A remains with both ends protruding from the concrete, this leads to serious disadvantages. That is, if both ends of the fixture are left protruding from the concrete, the protruding part will soon rust, and the rust will gradually spread to the part buried in the concrete, and the concrete will be destroyed due to expansion due to rust. Leading,
It has been found that a serious situation occurs.

[0009]

The present inventor has sought to prevent the above-mentioned disadvantages from occurring. For this purpose, an attempt was made to apply a rust preventive paint to both ends of the fixture, but the rust preventive paint was peeled off during handling, so that the intended purpose could not be achieved.

Next, the inventor of the present invention has attempted to integrally form the conventional mold fixture with an ethylene resin as it is.
However, a fixture integrally molded from ethylene resin is suitable as a fixture because if concrete is poured into a formwork, it will bend and deform due to the weight of the concrete unless it is made firmly using a large amount of resin. I knew there wasn't.

Therefore, the inventor of the present invention has decided to make at least a portion of the fixture that is in contact with the form flange at both ends and a portion near the form flange (that is, the connection portion) with a hard synthetic resin. Also, if the connecting part is made of a hard synthetic resin, the tip cannot be bent and locked to the formwork flange like a fixture made of iron plate, so an upright piece is provided at the tip and inside the upright piece A recess is provided, and the tip of the form flange is locked in the recess. In this way, we succeeded in making a fixture that can withstand concrete pouring and that does not destroy concrete.

According to the present invention, there is provided a mold fixing device having a length extending between two parallelly extending molds, and having connection portions to flanges formed on the edges of the molds at both ends in the longitudinal direction. , The connecting parts at both ends are made of a hard synthetic resin, and the connecting parts are connected by iron connecting parts to form an integral body.At the tip of the connecting part, a standing piece that stands on the same side is attached, Characterized by providing a recess for accommodating the tip of the flange,
A mold fixture is provided.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 3 is a perspective view of the formwork fixing device according to the present invention. FIG. 4 is a perspective view showing a use state of the form fixing device shown in FIG. FIG.
FIG. 4 is a perspective view of another formwork fixing device according to the present invention.

In FIG. 3, a mold fixing device P according to the present invention has a length L. The length L is a length sufficient to straddle between two molds extending in parallel. Further, the formwork fixing device P has connection portions Q and R to flanges formed on the edges of the formwork at both ends in the longitudinal direction, and is connected by a component S to be integrated therewith.

One of the features of the fixture P is that the connecting parts Q and R are made of a hard synthetic resin, and the connecting parts S are made of iron, and these are already integrated or can be integrated. is there. Further, the fixture P has upright pieces T and U at the ends of the connection portions Q and R, respectively, and further, inside the upright pieces T and U, a recess V for accommodating the tip of the form flange is provided. It is characterized by being attached. Furthermore, the depression V
Subsequent to this, a recessed portion W for inserting the form flange is provided.

The connecting portions Q and R are made by molding a hard synthetic resin. The molding method is not particularly limited. Various hard synthetic resins can be used. For example, a hard vinyl chloride resin, an olefin resin, an acrylic resin, a polyester resin, a polyamide resin such as poly-p-phenylene terephthalamide can be used.

The connecting part S is made of iron and is preferably a round bar, but may be a plate. When the intermediate part S is rod-shaped, it is suitable that male threads are cut at both ends of the connecting part, and these are fitted into female threads formed at the ends of the connection parts to be integrated.

The connecting portions Q and R are provided with upstanding pieces T and U at their ends. The standing pieces T and U are fixed to the fixture P
Standing on the same side of and facing each other. Further, a recess V for accommodating the tip of the form flange is provided inside the standing pieces T and U. In addition, the connecting portions Q and R are provided with a recessed portion W for recessing the formwork flange following the recess V. Therefore, the connecting portions Q and R usually have the recess V extending inward from the recess V so as to face the same recess V inward, and have mutually symmetric shapes.

Here, it is preferable that the length of the recessed portion W is substantially equal to the width of the form flange.

The form fixture P shown in FIG. 3 is used as shown in FIG. That is, similarly to the case shown in FIG. 2, first, the fixture P is laid under the ground. Next, the mold B is placed on the recessed portion W of the connection portion Q, and the end of the flange of the mold B is inserted into the recess V of the standing piece T. Then, the recessed part W
If the length is substantially equal to the width of the form flange, the flange will just fall into the recessed part W, and the form will move vertically and horizontally by the recess V and the recessed part W. It is regulated and stably held on the fixture P.

Similarly, another mold C is attached to another connection portion R. At this time, if the length of the recess W is not substantially equal to the width of the form flange, a separator, that is, a spacing rod D is provided between the opposing forms B and C.
To fix the molds together.

Further, as shown in FIG. 3, if a part of the inner end of the upright piece U is obliquely inclined to provide a slope X, it is easy to fit the mold into the recessed portion W. Become. This is because, when the mold is placed on the fixture, the mold is first tilted inward, the base of the mold flange abuts against the inner wall of the recessed portion W, and then the mold is brought close to an upright state. This is because the leading end of the frame flange slides along the slope X, and the leading end of the flange can be fitted into the recess V while the form flange gradually falls down the standing piece.

In the above, the case where the mold fixing device according to the present invention is attached to the lower end of the mold has been described. However, this fixing device can be attached not only to the lower end of the mold but also to the upper end of the mold. . If it is attached to the upper end of the formwork, the fixture is not embedded in the concrete, so it can be removed together with the formwork, so there is no special benefit from not being corroded, and the attachment is easy. The other benefits are of satisfaction.

The form fixture according to the present invention may be as shown in FIG. That is, the recessed portion W is
It is not necessary to be particularly depressed than the surface inside, and as shown in FIG. 5, it is flush with its inner surface,
It may be a portion formed by providing the raised portion Y protruding. Further, the connecting parts S may be plate-shaped. When the connecting part S is plate-shaped, it is suitable to insert-mold the connecting part S and integrate it from the beginning when the two connecting portions Q and R are formed of synthetic resin.

[0025]

According to the present invention, since the connecting portions located at both ends of the mold fixture are made of synthetic resin, they are attached to the lower end of the mold, concrete is poured into the mold, and the concrete hardens. When the formwork is later removed, the connection part made of synthetic resin is only exposed at both ends of the fixture, so if it is left as it is, it will not rust like a conventional iron fixture, so Concrete can be prevented from being destroyed. Further, since the exposed connecting portion is made of a synthetic resin, the exposed portion can be easily cut, and the cutting can be made such that there is no apparent fixture at all.

Also, an upright piece is attached to the tip of the connecting portion,
A recess for accommodating the tip of the form flange is provided inside the standing piece, and a concave portion for receiving the form flange is provided following the recess, so that the form flange is formed by the flexibility of the hard synthetic resin. The mold can be locked to the fixture simply by dropping it into the recess and fitting the tip of the mold flange into the recess. Therefore, the T-shaped part at both ends is folded like a conventional iron fixture. It does not need to bend and is easy to fix.

Further, since the connecting portion is made of a synthetic resin, the formwork fixing device according to the present invention is lighter in weight than an iron-made one. Moreover, since these fixtures are often used to make fabric foundations, a slight reduction in the weight of one fixture is a great benefit in reducing overall weight.

Further, in the form fixing device according to the present invention, the synthetic resin connecting portions Q and R at both ends and the iron connecting portion S can be separately formed, and therefore they can be integrated later. Therefore, if they are assembled together on site, a large space is not required for transportation and storage, which is convenient. Further, by changing the combination, various dimensional changes can be accommodated with a small number of parts, which is convenient.

Furthermore, if the length of the recess W is made substantially equal to the width of the form flange, the mold can be fixed to the fixture simply by dropping the form flange into the recess W. Fixation becomes easier.

Further, since the connecting parts are made of iron, the connection with concrete is good. Further, if the connecting member made of iron is formed in a rod shape, male screws are cut at both ends thereof, and the male screw is fitted with a female screw provided at the connecting portion to be integrated, so that the length L of the fixing tool can be reduced by the degree of fitting. Since it can be adjusted, even if there is a change in the form dimensions, it is possible to cope with this change. The present invention provides such benefits.

[Brief description of the drawings]

FIG. 1 is a perspective view of a conventional mold fixing device.

FIG. 2 is a perspective view showing a use state of the form fixing device shown in FIG. 1;

FIG. 3 is a perspective view of a formwork fixing device according to the present invention.

FIG. 4 is a perspective view showing a use state of the mold fixing device shown in FIG. 3;

FIG. 5 is a perspective view of another formwork fixing device according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1, 11 Outside standing piece 2, 21 Inside standing piece A Conventional formwork fixing tool B, C Formwork D Space holding rod P Formwork fixing tool Q, R Connection part S Connecting part T, U Upstanding piece according to the present invention V dent W recessed part X slope Y ridge

Claims (4)

[Claims] 1. A mold fixture having a length extending between two molds extending in parallel, and having connection portions to flanges formed on the edges of the mold at both ends in the length direction. The connecting parts at both ends are made of a hard synthetic resin, and the connecting parts made of hard synthetic resin are connected to form a single piece.A standing piece that stands up to the same side is attached to the end of the connecting part, and a formwork flange is set inside the standing piece. A formwork fixing device comprising a recess for accommodating a tip. 2. The mold fixing device according to claim 1, further comprising a recessed portion for receiving a mold flange following the recess. 3. The mold fixing device according to claim 2, wherein a length of the recessed portion for inserting the mold flange is substantially equal to a width of the mold flange. 4. An iron-made connecting part is formed into a rod shape, and male threads are cut at both ends thereof, and the male thread is fitted with a female thread provided at a connecting part to be integrated with the steel thread.
The formwork fixing device according to any one of the above items.