JPH0932280A - Form - Google Patents

Abstract

PROBLEM TO BE SOLVED: To release a plate-like body from concrete without damaging its periphery by forming a frame with a hard raw material over the surface periphery of a form, and closely fitting the plate-like body with the frame in the frame. SOLUTION: This form 1 is constituted of a frame 2 made of a hard raw material or a metal raw material and a plate-like body 3 made of a veneer or a hard synthetic resin raw material. The plane shape of the form 1 is made rectangular. The frame 2 is provided on at least the surface periphery of the form 1. The frame 2 is a frame body made of an aluminum alloy and having a rectangular shape on the plan view, it has a surface section on the surface outer peripheral face, and a step is provided on the inner face of the surface section as a plate-like body lock step section. The plate-like body 3 is removably fitted inside the surface section of the frame 2, and its periphery is mounted on the plate-like body lock step section.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a formwork used at a construction site or the like.

[0002]

BACKGROUND OF THE INVENTION Formwork is used at the construction site to assemble units for concrete pouring on walls and floors. Known types of these forms are so-called metal foams, which are steel panels used in a large wall formwork method and assembled by shuttering or the like. Also, a combination of a plate-shaped body such as plywood with a metal frame,
Alternatively, a single piece of wood, a panel made of plywood, or the like is also known. These were assembled at the construction site to make floor and wall units.

[0003]

A conventional steel panel, ie, a metal foam, which is a formwork, is strong but heavy, which makes it inconvenient to carry and handle. In addition, a single piece of veneer plywood has a problem that it is not strong enough and cannot be used repeatedly.

[0004] In particular, a mold made of only wood such as veneer plywood or a plywood having a relatively soft property has a problem that the periphery of the mold collapses when the mold is removed from the poured concrete.

An object of the present invention is to obtain a mold having a frame made of a hard material around the surface of the mold.

[0006]

In order to achieve this object, the mold of the present invention comprises a frame formed of a hard material around the surface of the mold, and a frame tightly fitted in the frame. It is composed of mating plates.

Further, the present invention is characterized in that it comprises a frame formed of a metal material around the surface of the mold, and a wooden plate-like member closely fitted in the frame within the frame. Is.

Further, the present invention is characterized in that it comprises a frame formed of a metallic material around the surface of the mold frame, and a wooden plate-like member which is tightly and detachably fitted into the frame within the frame. And the formwork.

Next, the operation of the present invention will be described. Since a hard material such as a metallic material is provided around the surface of the formwork, the surroundings of the formwork do not break or crack when the formwork is removed from the mold after placing concrete.

[0010]

1 is a plan view of a mold of an embodiment of the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, and is a partial sectional view of a third embodiment of a plate-like body. It will be described based on 3.

The mold 1 comprises a frame 2 made of a hard material or a metallic material and a plate-like body 3 made of veneer plywood or a hard synthetic resin material. The form 1 is usually rectangular in plan view, and the frame 2 is provided at least around the surface of the form 1.

In this embodiment, the frame 2 is a rectangular frame body made of an aluminum alloy in a plan view, and has a surface portion 2a serving as an outer peripheral surface of the surface and a plate-like member provided with a step inside the surface portion 2a. It has a stop 2b.

The plate-like body 3 is detachably fitted inside the surface portion 2a of the frame 2 and has a plate-like body engaging stepped portion 2b around its periphery.
Place on. The surface of the frame 2 and the surface of the plate-shaped body 3 are at the same height when the plate-shaped body 3 is placed on the plate-shaped body locking step portion 2b.

The plate-like body 3 is a veneer plywood in the first embodiment.

The plate-like member 3 is a hard synthetic resin plate in the second embodiment.

In the third embodiment, the plate-like body 3 has both side portions 4
The central portion 5 and the central portion 5 are made of different members, and the both side portions 4 and the central portion 5 are bonded and fixed by fitting the middle protrusion portion 41 of the both side portions 4 and the middle groove portion 51 of the central portion 5.

The central portion 5 of the plate-like body 3 is a plate-like body having flat upper and lower surfaces, and is formed of a lightweight and concrete-releasing material such as foamed hard urethane, veneer plywood, melamine resin, APS resin and the like.

Both side portions 4 of the plate-like body 3 of the third embodiment are made of a material different from that of the central portion 5 of the plate-like body 3 or the same material, and made of concrete such as a hard synthetic resin material such as polychlorinated biphenyl. It is made of a material with good peelability and good plasticity, and is provided over the entire length in the longitudinal direction.

The both side portions 4 are surfaces where the upper surface 40 contacts the concrete, and the upper surfaces of the both side portions 74 and the upper surface 50 of the central portion 5 are connected so as to be flush with each other.

Next, the operation of the embodiment of the present invention will be described. The formwork 1 is formed by engaging the frame 2 and the plate-like body 3 in a factory or a construction site. The frame 2 and the plate-like body 3 are of the same size and shape, and fit in the inside of the surface portion 2a of the frame 2 and have a size such that the periphery is placed on the plate-like body engaging step portion 2b. Good.

A large number of the forms 1 thus combined are arranged and used at a construction site. When the mold 1 is peeled off from the solidified concrete after the concrete is cast, the plate 3 is not collapsed or crushed because the surface periphery of the mold 1 is protected by the frame 2.

[0022]

As described above, according to the present invention, when the form is peeled off after the conventional concrete has been cast, the concrete without damaging the periphery of the plate, particularly the plate made of a soft wooden material such as plywood. Can be peeled off.

Further, the frame of the formwork and the plate-shaped body can be easily combined at a construction site or the like, and even if only the plate-shaped body is damaged by concrete pouring, it can be easily replaced.

Further, since the entire formwork is lightweight and solid, there is an effect that operations such as transportation and storage are easy.

[Brief description of drawings]

FIG. 1 is a plan view of a mold of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a partial cross-sectional view of a plate-shaped body according to a third embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Formwork 2 Frame 2a Surface part 2b Plate-like object locking step part 3 Plate-like object 4 Both side parts 40 Upper surface 41 Middle projection part 5 Center part 50 Upper surface 51 Middle groove part

Claims (3)

[Claims] 1. A formwork comprising a frame formed of a hard material around the surface of the formwork, and a plate-like body tightly fitted in the frame within the frame. 2. A formwork comprising a frame formed of a metallic material around the surface of the formwork, and a wooden plate-like body closely fitted in the frame within the frame. 3. A formwork comprising a frame formed of a metallic material around the surface of the formwork, and a wooden plate-like body which is tightly and detachably fitted into the frame within the frame. .