JPH08151788A - Combined form, and connecting device therefor - Google Patents

Abstract

PURPOSE: To improve workability with amendment on concrete surface after demolding made unnecessary on constructing a concrete footing, and to make forms recyclable. CONSTITUTION: A form A is constructed by detachably joining synthetic resin boards 2 to one side of a metal frame 1 that is formed in a rectangle by combining a plurality of vertical members 12 and horizontal members 13. An extended part is formed by extending a pair of opposite edges of the synthetic resin boards 2 up to the end face of the form A, and the extended part is joined to the end face of the metal frame 1. Clamps 31 for connection with another form A are provided on one side of the form A, and a plurality of forms A are connected with one another in a parallel form, and while the upper and the lower ends of the forms are connected with connecting members, the forms are connected with clamps 31 at both ends on the right and the left.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite formwork for constructing concrete foundations for houses and the like.

[0002]

2. Description of the Related Art Recently, it is general to use a mold made of steel or synthetic resin when pouring concrete.
It is not preferable that the concrete adheres to the surface of the form when the form is removed after placing the basic concrete for a house. For this reason, the release agent is applied to the surface when using the steel mold.

[0003]

Although the steel mold has high strength, it has a problem that it is heavy and not easy to carry. In addition, it is necessary to apply a release agent to the surface of the mold at the time of use, and if this release agent adheres to the RC reinforcing bar, there is a problem that a predetermined structural strength cannot be expected.

The mold made of synthetic resin is relatively lightweight and easy to carry. However, the strength is low, and a large number of fixing separators, steel pipes for reinforcement, etc. are required when arranging the mold, and workability cannot always be improved.
Further, since the fixing separator is embedded in the basic concrete, there is a problem that it is necessary to repair the concrete surface after removing the mold from the mold. By improving the strength of the synthetic resin mold, it is possible to reduce the number of fixing separators and reduce the problem of repairing the concrete surface, but the shape of the resin mold becomes complicated and the mold is molded. However, there is a problem that the molding die is expensive.

In order to solve the above problems, the fairness 6-26669
The formwork for concrete pouring disclosed in Japanese Patent Publication has been proposed. This technology relates to a form made by adhering a synthetic resin plate to a steel outer frame with an adhesive such as double-sided tape.It is possible to see the placed concrete layer from the outside through the synthetic resin plate. It was made possible. However, in this technique, since the synthetic resin plate is attached to the outer frame with an adhesive, there is a problem that it is difficult to remove the synthetic resin plate from the outer frame when the synthetic resin plate is contaminated or damaged. is there. Further, even in this formwork, it is indispensable to use a separator, and it is not possible to solve the problem that the concrete surface must be repaired after demolding the formwork.

It is an object of the present invention to provide a recyclable composite formwork and a composite formwork joining device that does not require a separator and does not require repair of the concrete surface after demolding.

[0007]

In order to solve the above problems, a composite mold according to the present invention is a composite mold in which a synthetic resin plate is bonded to one surface of a rectangular metal frame body. A synthetic resin plate is detachably connected to a metal frame.

In the above composite form, it is preferable that at least a pair of peripheral portions of the synthetic resin plate facing each other be extended to the end face of the metal form, and the extended portions are joined to the end face of the metal frame.

Further, in the composite form joining apparatus according to the present invention, a plurality of any one of the above composite forms are connected in parallel, and the upper and lower ends of the parallel composite forms are connected by a connecting member. It will be.

[0010]

[Operation] The above composite formwork (hereinafter simply referred to as "formwork")
Since the synthetic resin plate is detachably attached to one surface of the metal frame body made of metal, the metal frame body can exert the necessary strength and the synthetic resin plate can be opposed to the concrete placing surface. I can. Therefore, it is possible to reduce the weight of the mold and improve the workability by eliminating the need to apply the release agent. Further, by attaching the synthetic resin plate to the metal frame in a detachable manner, the synthetic resin plate can be replaced and used when the synthetic resin plate is deteriorated or contaminated.

Further, since the above-mentioned formwork has a sufficiently high strength, the fixing separator is formed by connecting the upper and lower end parts and the left and right end parts of the formwork arranged in parallel with the installation position of the concrete foundation by connecting members. It can be fixed without using. For this reason, after the mold is removed from the mold, the fixed separator does not remain behind the concrete surface that has been cast, and repair work on the concrete surface can be eliminated.

[0012]

EXAMPLES Examples of the above molds will be described below with reference to the drawings. FIG. 1 is a diagram for explaining the configuration of the mold, and FIG. 2 is FIG.
II-II cross-sectional view of FIG. 3, FIG. 3 is a diagram illustrating an example of the shape of the reinforcing ribs of the frame body, FIG. 4 is a diagram illustrating a configuration in which a synthetic resin plate is coupled to the frame body, and FIG. FIG. 6 is a diagram for explaining the shape of the opening, FIG. 6 is a diagram for explaining another example of the mold, FIG. 7 is a perspective view for explaining a state in which the molds according to this embodiment are continuously arranged, and FIG. FIG.

As shown in FIGS. 1 to 5, the mold A is constructed by detachably connecting a synthetic resin plate 2 over the entire surface of one side of the metal frame 1 which is in contact with concrete. There is.

The metal frame body 1 is a plate material made of metal such as steel or aluminum having a size corresponding to the size of the form A in advance.
11 and a frame configured by combining a plurality of vertical members 12 and horizontal members 13 made of metal such as steel or aluminum for reinforcing the plate member 11.

That is, the two horizontal members 13 are arranged at the portions corresponding to the upper and lower ends of the form A, and the four vertical members 12 are arranged at the left and right ends and in the middle of the form A. 12 and the transverse member 13 are joined together by means such as welding to form a ladder-shaped frame, and the plate material 11 is joined to the vertical member 12 and the transverse member 13 by means such as welding on one surface of this frame. The metal frame 1 is composed of.

The vertical member 12 preferably has a high rigidity as compared with its weight. As shown in FIG.
The hat type shown in (a), the trapezoid type with legs shown in FIG.
There are T-shaped and square pipes shown in FIG. 7C, and these materials can be selectively used.

As the lateral member 13, an angle member or a channel member can be used. In particular, in the form A of this embodiment, since the peripheral edge of the synthetic resin plate 2 can be joined to the end face of the metal frame 1, it is preferable to use the form material as the lateral member 13.

An opening 11a is formed in a portion of the plate material 11 surrounded by the vertical member 12 and the horizontal member 13. The opening 11a is for visually recognizing the concrete surface when the concrete is poured, and for judging the quality of the surface. The shape of the opening 11a does not necessarily have to be rectangular, and may be an elliptical opening 11a as shown in FIG.

The synthetic resin plate 2 has appropriate heat resistance and chemical resistance,
Any material may be used as long as it has weather resistance, abrasion resistance, impact resistance, peelability and mechanical strength, and the material is not particularly limited. Further, when the opening 11a is formed in the metal frame body 1, it is preferable to use one having high transparency. Examples of such synthetic resin include polycarbonate, polypropylene, acrylic, polyvinyl chloride and the like. By using a plate made of the above synthetic resin as the synthetic resin plate 2, it is possible to grasp the placing condition of the concrete surface from the outside.

The synthetic resin plate 2 is detachably connected to the metal frame 1. There are various coupling methods as shown in FIG. That is, FIG. 1A shows the synthetic resin plate 2 coupled to the metal frame 1 by using the countersunk screw 21. In this case, the dish screw 21 is arranged on the concrete placing surface, and problems such as transfer of the dish screw 21 to the concrete surface and adhesion of concrete around the dish screw 21 are expected. However, it is possible to avoid the problem by caulking the plate screw 21 with putty or the like.

Considering the ease of attachment / detachment of the synthetic resin plate 2 to / from the metal frame 1, it is preferable to provide the connecting portion on the end surface of the metal frame 1. For this reason, two opposite sides (two sides in the vertical direction or two sides in the horizontal direction) of the synthetic resin plate 2 are extended to form an extension portion 2a, and the extension portion 2a is formed in the vertical direction or the left / right direction of the metal frame body 1. Is configured to be joined to the end face in the direction. In this embodiment, two sides in the vertical direction of the synthetic resin plate 2 are extended to form extension portions 2a, and these extension portions are joined to the end surface of the lateral member 13 of the metal frame body 1.

FIGS. 4 (b) to 4 (e) are views for explaining a method of connecting the extension 2a of the synthetic resin plate 2 to the metal frame 1. As shown in FIG. In the same figure (b), tap holes are formed at a predetermined interval in the extension 2a, and screw holes are formed in the lateral member 13 of the metal frame 1 at intervals equal to the pitch of the tap holes. twenty two
Are combined by.

FIG. 1C shows a groove 14 in which the extension 2a of the synthetic resin plate 2 can be fitted to the lateral member 13 of the metal frame 1.
The mounting member 15 for forming the above is fixed, holes 15a are formed at predetermined intervals on the upper surface of the mounting member 15, and projections 2b are formed in the extension portion 2a of the synthetic resin plate 2 at intervals equal to the holes 15a. The extension 2a is fitted in the groove 14 so that the protrusion 2b is formed in the hole 15.
It is fitted to and joined with a.

In FIG. 3D, a mounting member 15 similar to the above-mentioned structure is fixed to the lateral member 13 of the metal frame 1 and the hole 15a is formed.
Instead of this, a tap hole 15b is formed, and the extension 2a of the synthetic resin plate 2 is fitted into the groove 14 and is joined by a screw 22.

In FIG. 1E, a mounting member 15 similar to the above-described structure is fixed to the lateral member 13 of the metal frame 1 and the hole 15a is formed.
Instead, an elastic engaging piece 15c is formed, and the extension 2a of the synthetic resin plate 2 is fitted into the groove 14 so that the projection 2b formed on the extension 2a is engaged with the engaging piece 15c. It is a combination.

In the mold A constructed as described above, the contact surface with the concrete is the synthetic resin plate 2, which is smooth and has good peelability. Further, the strength of the mold A can be guaranteed by the metal frame 1, and the workability can be improved without the need to apply a release agent to the surface unlike the steel mold.

In the above-described embodiment, the metal frame 1 is attached to the vertical member 12
The plate member 11 having the opening 11a formed in the frame composed of the horizontal member 13 and the horizontal member 13 is joined to the frame member. However, as shown in FIG. 6, the metal frame body 1 is manufactured with high strength and the synthetic resin plate 2 is sufficiently formed. By using a material having high strength, it is possible to form the form A without using the plate material 11.

A plurality of U-shaped clamps 31 are vertically arranged on one side of the mold A in the left-right direction (left side in FIG. 1) and are slid in parallel to the left-right direction of the form A. It is attached so as to be movable and rotatable on the back side of the form A.

The clamp 31 is composed of a shaft portion 31a and a hook portion 31b, and a plurality of molds A are continuously arranged in the longitudinal direction to form each mold A.
After abutting the vertical members 12 arranged at both ends of the mold, the shaft members 31a are protruded from the mold A and the vertical members of the adjacent mold A are adjacent to each other.
The two vertical members 12 are sandwiched and fixed by inserting them into holes (not shown) formed in 12 and facing the hook portions 31b so as to straddle the respective vertical members 12, and then rotating the hook portions 31b. It is a thing.

Next, a procedure for constructing the form B for constructing a building foundation by connecting the form A to each other will be described with reference to FIGS. 7 and 8.

A plurality of molds A are arranged in a row in the longitudinal direction and arranged so as to face each other, adjacent molds A are fixed to each other by a clamp 31, and the vertical ends of the opposite molds A are connected to each other. The members 32 are connected. This allows
The molds A arranged so as to face each other maintain a separation distance from each other.

When arranging a plurality of molds A facing each other, it is preferable to place these molds A on the base piece 33 to which the connecting member 32 is attached. The connecting member 32 is made of a relatively thin steel plate having flexibility, and has claw-shaped connecting portions 32a for engaging and connecting with the lateral members 13 arranged at the upper and lower ends of the form A at both ends in the longitudinal direction. Has been formed. The connecting portion 32a has a function of connecting the facing form A by being bent so as to face the lateral member 13 of the form A.

Further, the base piece 33 is formed in a piece shape having a space (not shown) through which a reinforcing bar is passed, and when constructing the foundation, it is arranged at a predetermined pitch on waste concrete.

[0034]

As described in detail above, in the mold according to the present invention, when the synthetic resin plate is detachably coupled to one surface of the metal frame, the synthetic resin plate is deteriorated or contaminated. Can be removed from the metal frame and replaced,
It can always be used as a fresh formwork.

When the connecting portion of the synthetic resin plate to the metal frame is set on the end face of the frame, the mounting screws are not exposed to the concrete surface, and the concrete surface is repaired or screwed. No concrete adheres. Therefore, the work of replacing the synthetic resin plate can be easily performed.

Further, by providing a clamp on one side of the mold, a plurality of molds can be arranged and other adjacent molds can be fixed to each other. Further, since the molds arranged so as to face each other are connected by the connecting member, the fixing separator is not required. Therefore, the concrete surface is not required to be repaired, and the workability can be improved, and the construction period and cost can be shortened.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a configuration of a mold.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a diagram illustrating an example of a shape of a reinforcing rib of a frame body.

FIG. 4 is a diagram illustrating a configuration in which a synthetic resin plate is coupled to a frame body.

FIG. 5 is a diagram illustrating a shape of an opening formed in a mold.

FIG. 6 is a diagram illustrating another example of the formwork.

FIG. 7 is a perspective view illustrating a state in which molds according to the present embodiment are continuously provided.

FIG. 8 is a development view when the formwork apparatus is installed.

[Explanation of symbols]

 A, B Formwork 1 Metal frame 2 Synthetic resin plate 2a Extension 2b Protrusion 11 Plate material 11a Opening 12 Vertical member 13 Horizontal member 14 Groove 15 Mounting member 15a Hole 15b Tap hole 15c Engaging piece 21 Plate screw 22 Screw 31 Clamp 31a Shaft 31b Hook 32 Connection member 32a Connection 33 Base piece

Claims (3)

[Claims] 1. A composite form frame in which a synthetic resin plate is bonded to one surface of a rectangular metal frame body, wherein the synthetic resin plate is detachably connected to the metal frame body. Composite formwork. 2. The at least one pair of opposing peripheral edges of the synthetic resin plate are extended to the end face of the metal form, and the extended portions are joined to the end face of the metal frame. Composite formwork. 3. A composite mold for concrete, wherein a plurality of the composite molds according to claim 1 or 2 are connected in parallel and the upper and lower ends of the parallel composite molds are connected by a connecting member. Frame joining device.