JPH07247678A - Plastic form for placing concrete - Google Patents

Abstract

PURPOSE:To reduce cost by providing square or triangular corner members at four corners of a plastic form having a square plan view for placing concrete, in such a way as allowing replacement. CONSTITUTION:A plastic form 1 for placing concrete is formed to be rectangular in plan view, using four flanges 2 all around, and the flanges 2 are internally fitted with reinforcement ribs 3 at the prescribed intervals. Thereafter, space is formed at the four corners 4 of the form 1 for replacing a funnel type corner member 5 having a square plan view for fitting a new member with bolts and nuts 6. Also, the corner member 5 at the four corners 4 of the form 1, when broken, is replaced by a new corner member 5. According to this construction, economy can be enhanced without disposing of the whole of the form 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic formwork for placing concrete.

[0002]

2. Description of the Related Art Conventionally, a concrete casting mold 20 of this type has a rear surface as shown in FIG. 10, for example, and is formed in a plane rectangular shape by four flanges 21 all around.
In addition, a plurality of reinforcing ribs 22 are attached in parallel to each other inside the flange 21 at a predetermined interval. This may be made of steel, aluminum or plastic, for example. In addition, the four corner portions 23 of the mold 20 are formed integrally with the main body at substantially right angles. Each of the flanges 21 is provided with a plurality of holes 24 at predetermined intervals. The holes 24 are used when temporarily adhering the two adjacent molds 20, 20 to each other.

That is, as shown in FIG. 11, for example, the shaft portions 25a provided on the binding metal fittings 25 are respectively inserted into the holes 24 facing each other of the two adjacent molds 20, 20 as shown in FIG. The shaft 25a is rotated about the rotation axis.
As a result, the flanges 21 of the two adjacent molds 20, 20 are provided on the binding fitting 25, and the U-shaped binding portion 25b is provided.
It is tightly fixed by being sandwiched by each other. Reference numeral 26 denotes a pair of lateral end thicknesses that are horizontally arranged and support the two adjacent molds 20, 20 when the mold 20 is a wall mold.

[0004]

However, according to this prior art, when the formwork 20 for concrete driving is made of steel, it is heavy and requires a lot of manpower for the work to be accidentally dropped at the site. However, there are drawbacks that are dangerous and costly.

Further, when the formwork 20 for casting concrete is made of aluminum or plastic, the work is easy because it is lightweight, but especially when it is dropped by mistake at the site, especially the corners of the formwork 20. 23 is easily broken and easily damaged. Therefore, the mold having the damaged corner portion 23 cannot be properly used in the field,
It was discarded and was extremely uneconomical. In particular, there is a drawback that the cost is high in the case of aluminum.

[0006]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned drawbacks of the prior art, in which the four corners of a plastic quadrangular concrete formwork made of a lightweight and inexpensive material are used. The purpose of the present invention is to provide a plastic formwork for concrete driving in which the corner members are replaceably attached to the sectioned portions.

[0007] In a preferred embodiment of the present invention, the corner member is made of a material having a mechanical strength higher than that of wood, and the corner member is formed in a plane quadrangle or a plane triangle.

[0008]

When the corner members attached to the four corners of the flat rectangular plastic mold are broken and damaged, the damaged corner members can be easily replaced with new undamaged corner members. I did it.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The plastic formwork for concrete driving according to the present invention will be described in detail below with reference to the drawings.

1 to 3 are views showing the basic construction of an embodiment of a plastic formwork for concrete driving according to the present invention. FIG. 1 is a plan view, FIG. 2 is a front view, and FIG. It is a perspective view of a corner member. Reference numeral 1 is a plastic formwork for concrete driving according to the present invention, which has a rear surface and is provided with four flanges 2 on the entire circumference of a standard rectangular plane (size 600 ×
1800 × 60 to 70 mm), and three reinforcing ribs 3 are provided at predetermined intervals (150 mm) in the flange 2.
mm) made of plastic attached in parallel. This plastic product is economical because it is lightweight and inexpensive.

Moreover, the four corners 4 of the mold 1 are
Box-shaped corner member 5 (dimensions 100 x 100 x
(60 to 70 mm) are replaced, and space portions for being appropriately mounted by mounting means 6 such as bolts and nuts are defined. The corner member 5 as shown in FIG.
Is made of plastic or a material having higher mechanical strength than that, for example, rope or aluminum. The corner member 5 is also provided with two mounting holes 7, through which bolts are inserted at the time of mounting and tightened with nuts.

If the plastic formwork 1 for concrete driving having the above-mentioned construction is used, the plastic formwork 1 having a flat rectangular shape will be dropped and the corner members attached to the four corner portions 4 of the plastic formwork 1. If any one of the 5 is broken and damaged, it is only necessary to replace the damaged corner member 5 with a new undamaged corner member 5 stored separately. Therefore, it is not necessary to discard the entire plastic mold as in the conventional case, and there is no waste.

FIG. 4 is a perspective view showing another embodiment of the plastic formwork for concrete driving according to the present invention.
FIG. 5 is a front view of the same. In these drawings, reference numeral 8 denotes a plurality of lateral end thick recesses formed on the flange 2 and the plurality of reinforcing ribs 3 of the plastic mold 1 on the same line. By forming these lateral edge thick recesses 8,
Positioning of a pair of horizontal end thicknesses 26 horizontally arranged to respectively support the two adjacent molds 1 and 1 can be easily performed.

FIG. 6 is a perspective view showing another embodiment of the plastic formwork for concrete driving according to the present invention.
In this figure, 3a is a reinforcing rib having a thickness dimension in which the thickness of the flange 2 of the plastic formwork 1 is doubled. The flange 2 and the reinforcing rib 3a are provided with a plurality of holes 9 at appropriate positions at predetermined intervals. The holes 9 provided in the flange 2 are used to temporarily fix the two adjacent formwork 1, 1 to each other. That is, for example, the shaft portions 25a provided on the binding metal fittings 25 as shown in FIG. 11 are inserted into the holes 9 facing each other of the adjacent two molds 1 and 1, respectively, and the shaft portions 25a are used as the rotating shafts. To move. As a result, the two adjacent formwork 1,
The flanges 2 of No. 1 are sandwiched and tightly connected to each other by the U-shaped tightening portions 25b provided on the tightening metal fitting 25.

At an appropriate position on the upper end of the reinforcing rib 3a,
A recess 10 is formed, and the hole 9 provided in the vicinity of the recess 10 can be used to store, for example, a binding fitting 25 as shown in FIG. In other words, the shaft portion 25a of the binding metal fitting 25 is inserted into the hole 9 and the adjacent flanges 1 and 1 are temporarily fixed, and the recess 10 of the reinforcing rib 3a is sandwiched and tightly connected. Reinforcing rib 3
If a plurality of binding metal fittings 25 are attached and placed on a, it is possible to remove and use the plurality of binding metal fittings 25 attached to the reinforcing ribs 3a when the two formwork 1a and 1b adjacent to each other are sandwiched and tightly bound. It is possible and extremely convenient. Further, it is not necessary to separately store this binding member 25, and it will not be lost. The recess 10 is formed by
This is because when the binding metal fitting 25 is attached, the upper surface of the binding metal fitting 25 becomes the same as the upper surfaces of the flange 2 and the reinforcing rib 3a.

FIG. 7 is a perspective view showing another embodiment constituting a part of the plastic formwork for concrete driving according to the present invention. In this embodiment, 11 is a slender plastic form formed by enclosing the entire circumference of the back surface with a flange 11a having a standard length dimension (1800 mm) and a lateral dimension of a predetermined width t (integer). It is the body. By connecting a plurality of elongated plastic mold bodies 11 in combination, the plastic mold 1 having a width dimension within the standard or a width dimension outside the standard can be configured.

The connection between the elongated plastic frame members 11 can be performed by using, for example, a binding member 25 as shown in FIG. 11 as described in the above embodiment.
That is, the shaft portion 25a of the binding metal fitting 25 is provided with the holes 11 facing each other of the flanges 11a of the two plastic mold bodies 11 adjacent to each other.
Each of the flanges 11a is inserted into the corresponding b and is rotated with the shaft portion 25a as a rotation shaft so that the flanges 11a are connected to each other by the binding metal member 25.
The U-shaped binding portions 25b provided in the above are sandwiched and tightly bound.

In each embodiment of the plastic formwork 1 for concrete driving according to the present invention, a plurality of reinforcing ribs 3 are attached in parallel in the flange 2 at a predetermined interval, but not limited to this. As shown in another embodiment shown in FIG. 8A, the hexagonal reinforcing ribs 12 may be attached inside the flange 2, and although not shown, lattice-like or various-shaped reinforcing ribs may be attached. Of course.

In particular, at the four corners 4 of the plastic formwork 1 to which the hexagonal reinforcing ribs 12 are attached, a triangular prism type corner member 13 forming a plane right triangle is replaced to replace the bolt,
Space portions are formed respectively for proper mounting by mounting means such as nuts. This corner member 13
Is made of plastic as shown in FIG. 8B or a material having mechanical strength higher than that of plastic, for example, rope or aluminum. A mounting screw hole 14 is provided in the corner member 13 and is screwed with a bolt during mounting.

The binding metal fittings 25 used in the respective embodiments of the present invention are not limited to the conventional fittings shown in FIG. Needless to say, it may be an appropriate one.

FIG. 9 is a plan view showing a state in which a space for concrete driving is created by using a plurality of plastic molds for concrete driving according to the present invention.
Adjacent two molds 1 and 1 are fixed to each other using a fastener 25.

Incidentally, it is preferable to use an angle member 16 as shown in FIG. 9 (b) at a portion where the plastic formwork 1 for concrete driving crosses at right angles. This allows
It is possible to reliably prevent concrete from leaking from the corner. The angle member 16 is a plastic mold 1
Holes 17 are provided at the same intervals as the holes 9 of FIG. Therefore, the plastic mold 1 and the angle member 16 can be fastened in the same manner as the two adjacent molds 1 and 1.

[0023]

According to the plastic formwork for concrete driving of the present invention, the corner members are replaceably attached to the respective sections divided into four corners of the plastic formwork for square concrete driving. So, if you accidentally drop the plastic formwork on the spot,
If any of the corner members attached to the four corners of the plastic form are broken and damaged, the damaged corner members need only be replaced with new, undamaged corner members. Therefore, it is not necessary to dispose of the entire plastic mold as in the past, which is not only economical,
Since it is lightweight, it does not require a lot of manpower for the work, the work is easy, and the cost is low.

Further, according to the preferred embodiment, since the corner member is made of a material having higher mechanical strength than plastic, the corner portion is less likely to be broken even if the plastic mold is dropped.

[Brief description of drawings]

FIG. 1 is a plan view showing the basic structure of an embodiment of a plastic formwork for concrete driving according to the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a perspective view of the corner member.

FIG. 4 is a perspective view showing another embodiment of the plastic formwork for concrete driving according to the present invention.

FIG. 5 is a front view of the same.

FIG. 6 is a perspective view showing another embodiment of the plastic formwork for concrete driving according to the present invention.

FIG. 7 is a perspective view showing another embodiment constituting a part of the plastic formwork for concrete driving according to the present invention.

8 (a) is a schematic plan view showing another embodiment of the plastic formwork for concrete driving according to the present invention, and FIG. 8 (b) is used in the embodiment shown in FIG. 8 (a). It is a perspective view of a triangular prism type corner member.

FIG. 9 (a) is a plan view showing a state in which a space for concrete driving is created by using the plastic mold for concrete driving according to the present invention, and FIG. 9 (b) is an angle member used for the space. It is a perspective view.

FIG. 10 is a perspective view for explaining a conventional concrete-casting formwork.

FIG. 11 is a perspective view of a binding fitting used in the related art and the embodiment of the present invention.

FIG. 12 is a perspective view showing a usage state of the same binding fitting.

[Explanation of symbols]

 1,11 Plastic formwork for concrete driving 2,11a Flange 3,3a Reinforcing rib 4 Corner part 5 Box-shaped corner member 6 Mounting means (bolts, nuts) 7 Mounting hole 8 Side recess for wide end 9,11b Hole 10 Recess 12 Reinforcing ribs in a tortoiseshell shape 13 Triangular prism type corner member 14 Angle member 15 Hole 25 Fastening metal fitting 25a Shaft portion 25b U-shaped tight binding portion 26 Side thick end

Claims (3)

[Claims] 1. A plastic formwork for concrete driving, characterized in that corner members are attached in a replaceable manner to parts respectively divided into four corners of a plastic formwork for square concrete driving. . 2. The plastic formwork for concrete driving according to claim 1, wherein the corner member is made of a material having mechanical strength higher than that of wood. 3. The corner member is formed in a plane quadrangle or a plane triangle.
The plastic formwork for concrete driving described in.