JP2000336816A - Concrete form, and joint for fixing concrete form panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint for fixing a concrete form panel which can be easily arranged and fixed without any supporter from the outside, and a concrete form capable of forming a wall surface without removing the concrete form panel even after a concrete is cured. SOLUTION: In a joint 1 for fixing a concrete form panel, a strip-shaped, T-shaped or inversely wedge-shaped fixing head is formed on an end part to be brought into contact with and fixed to the concrete form panel surface before and behind the joint body, a joint fitting groove 12 having a fixing groove to be fitted to the fixing head of the joint 1 for fixing the concrete form panel 10 is formed inside face and rear surfaces forming each pair of the concrete form panel 10, and this joint fitting groove 12 is formed along a line in which at least one of a pair of concrete form panels 10 is slidable in the vertical or right-to-left direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete formwork for concrete walls and pillars formed by driving concrete into civil engineering and construction works, and a concrete formwork panel for forming a wall surface without removing even after concrete hardening. And a joint for fixing a concrete formwork panel.

[0002]

2. Description of the Related Art Conventionally, a wall or a pillar made of concrete is constructed by setting a scaffold on the outer periphery of the entire structure, or by arranging a formwork panel and arranging a reinforcing member inside, and further forming a strong supporter from the outside. The concrete was filled inside the formwork panel. After the concrete was hardened, the form panels were removed and dismantled to build structures such as walls and columns.

As a method of supporting the formwork panel from the inside in addition to a supporter from the outside, a method of fixing a bar of a reinforcing bar penetrating from the inside to the outside of the formwork panel with a nut is known. However, after removing the form panels, the bars and nuts of the reinforcing bars that penetrate and protrude are exposed as they are, and they are not well-formed. Not only was it bad, but the construction period was prolonged and costs were high.

Therefore, in order to solve the above problems,
It has also been proposed to manufacture concrete formwork in which a pair of concrete formwork panels are fixed at predetermined intervals in advance with spacers or the like at a factory and transport it to the construction site, but the transportation cost and construction are large. Eventually, this method was not only inefficient in operation and efficiency, but also increased in cost.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a concrete formwork capable of easily arranging and fixing a formwork panel having a decorative exterior without a supporter from the outside when concrete is poured in civil engineering and construction. It is an object of the present invention to provide a panel fixing joint and a concrete formwork capable of forming a wall surface without removing a concrete formwork panel even after hardening of concrete.

[0006]

To achieve the above object, a concrete formwork according to the first aspect of the present invention comprises a concrete formwork panel having front and back surfaces and side surfaces forming a concrete wall surface, and the concrete formwork panel. A concrete formwork formed by a concrete formwork panel fixing joint disposed inside the panel, wherein the concrete formwork panel fixing joint includes a concrete formwork panel front and rear of the joint body. A T-shaped or inverted wedge-shaped fixing head is formed at the end to be contact-fixed, and the concrete form panel fixing joint is provided inside the pair of front and back surfaces of the concrete form panel. While forming a joint fitting groove to fit the fixed head, this joint fitting groove,
At least one of the pair of concrete form panels is formed along a straight line slidable up and down or left and right.

The concrete form panel fixing joint according to the second aspect of the present invention is a concrete mold for fixing the concrete form panels on the front and back surfaces at a predetermined interval inside a pair of front and back concrete form panels. A joint for fixing a frame panel, wherein a fixing head having a T-shaped cross section or an inverted wedge-shaped cross section is formed at a fixed contact end portion of the joint body to a concrete form panel at the front and rear thereof. I do.

The joint for fixing a concrete form panel according to the third aspect of the present invention is the joint for fixing a concrete form panel in the second aspect.
The cross-sectional shape of at least the fixed contact end to the concrete form panel is formed by bending a metal strip along the periphery of a T-shape or an inverted wedge, and connecting the metal strip to at least one of the fixed contact ends. It is characterized by being formed on the part side.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described.
This will be described with reference to the drawings. FIG. 1 is a perspective explanatory view of a joint for fixing a concrete form panel of the present invention, and FIG.
FIG. 3 is an explanatory perspective view showing the inner surface side of a concrete form panel forming the concrete form of the present invention. FIG. 3 shows a state where the concrete form panel fixing joint of FIG. 1 is attached to the concrete form panel of FIG. FIG. 4 is a perspective explanatory view showing a method of attaching a concrete form panel fixing joint to a concrete form panel. FIG. 5 is a perspective view showing a concrete form panel on the front and back sides via a concrete form panel fixing joint. FIG. 6 is a cross-sectional explanatory view showing a state in which the concrete form panel and the concrete form panel fixing joint are fitted and fixed in FIG. 5 when viewed from above.

First, as shown in FIG. 1, inside a pair of front and back concrete form panels, a concrete form panel fixing joint 1 for fixing the front and back concrete form panels 10 at predetermined intervals. A fixed head 3 having an inverted wedge-shaped (or T-shaped) cross-section is formed at a fixed contact end of the joint body 2 with a concrete form panel before and after.

The joint 1 for fixing the concrete form panel ideally bends a metal band plate around the T-shaped or inverted wedge-shaped cross section of the fixed contact end portion to the concrete form panel 10. Formed. Further, the joining portion 4 of the metal strip is formed on at least one of the fixed contact end portions.

On the other hand, as a concrete form, as shown in FIGS. 2 to 4, concrete form panels 1 on the front and back sides and side surfaces forming a concrete wall surface.
0, 20 and a concrete formwork panel fixing joint 1 disposed inside the concrete formwork panel, wherein the concrete formwork panel fixing joint 1 is provided as described above. A fixed head 3 having a T-shaped cross section or an inverted wedge is formed at an end portion of the joint body 2 which is in contact with and fixed to the concrete form panel surface, which is the front and rear of the joint body 2.
A joint fitting groove 12 having a fixing groove 11 for fitting to the fixing head 3 of the concrete form panel fixing joint 1 is formed inside each pair of the front and back surfaces of the concrete form panel. Fitting groove 1
2 is formed along a straight line in which at least one of the pair of concrete form panels 10 can slide up and down or left and right. In this embodiment, joint fitting grooves 12 are formed in both the side of the concrete form panel 10 along the vertical direction.

The method of using and forming the concrete form panel fixing joint 1 and the concrete form work thus formed is as follows. First, as shown in FIG. 3, one concrete form panel 10 is built at a predetermined position. Then, the concrete form panel fixing joints 1 are attached to the joint fitting grooves 12 at intervals of about one every 50 cm. As shown in FIG. 4, the joint 4 of the concrete form panel fixing joint 1 is shifted, and the fixing head 3 is connected to the joint fitting groove 1 of the concrete form panel 10 as shown in FIG.
2 and the joint 4 of the concrete form panel fixing joint 1 is aligned with the fixing head 3 firmly touching the fixing groove 11, and the concrete form panel fixing joint 1 becomes the concrete form panel 10. It is fixed firmly.

In this way, the joint 1 is appropriately arranged in the joint fitting groove 12 of the concrete form panel 10 and the joint 1 for fixing the concrete form panel as shown in FIG.
After mounting, the opposing concrete formwork panel 10
(Foreground in the figure) is suspended from above by a crane or the like, and the fixing head 3 of each concrete form panel fixing joint 1 is slid from above into the joint fitting groove 12 and fixed down. In this way, the concrete form panels 1 opposed to each other by the joints 1 for fixing the concrete form panels.
0 is fixed (see FIG. 6). Then the side panel 20
Are fixed to the concrete form panel 10 with screws or nails or an appropriate fixing method to form a concrete form.

In the above, the joint 1 for fixing the concrete form panel to one concrete form panel 10 is provided.
At the stage of mounting, if necessary, a reinforcing bar or the like is sewn and arranged by the plurality of concrete form panel fixing joints 1. In the above, the concrete formwork panel 10
The adjacent forming interval of the joint fitting groove 12 is about 50 cm, and the interval at which the concrete form panel fixing joint 1 is arranged on the concrete form panel 10 is about 50 cm as described above. Depends on the length and size of the concrete form panel fixing joint 1. For example, when the length of the joint 1 for fixing the concrete formwork panel is about 10 to 20 cm and the metal strip is bent, the thickness of the metal plate is about 1 to 2 mm. It is slightly changed depending on the conditions.

As shown in FIG. 5, concrete walls and pillars can be formed by driving concrete while covering the surroundings with concrete form panels 10 and 20. In particular, even after the concrete is poured, the concrete form panels 10 and 20 form the wall surfaces without being removed, so that the construction period can be extremely shortened.

In the above description, the concrete form panels 10 and 20 may be formed of one-piece or plywood wood, or may be formed of stone or concrete.
What is necessary is just to select an appropriate thing. The concrete form panel fixing joint 1 may be formed of metal or resin as shown in FIG. 1 instead of being formed by bending a metal strip. Furthermore, in the concrete form panel fixing joint 1, in order to form a fixing head having a T-shaped or inverted wedge-shaped cross section at the fixed contact end portions of the joint body 2 to the concrete form panel before and after this joint body 2 The three-dimensional shape of the fixed head may be dish-shaped or conical.

[0018]

As described above, according to the present invention,
The concrete formwork panels can be easily arranged and fixed without external supporters, and the walls can be formed as they are without removing the concrete formwork panels even after the concrete is hardened, so the work efficiency can be greatly improved and the construction period shortened. It is extremely useful in industry, for example, the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective explanatory view of a joint for fixing a concrete form panel of the present invention.

FIG. 2 is an explanatory perspective view showing an inner surface side of a concrete formwork panel forming the concrete formwork of the present invention.

3 is an explanatory perspective view showing a state where the concrete form panel fixing joint of FIG. 1 is attached to the concrete form panel of FIG. 2;

FIG. 4 is an explanatory perspective view showing a method of attaching a concrete form panel fixing joint to the concrete form panel.

FIG. 5 is an explanatory perspective view showing a state where the front and back concrete form panels are fixed via a concrete form panel fixing joint.

FIG. 6 is an explanatory cross-sectional view of the state in which the concrete form panel and the concrete form panel fixing joint are fitted and fixed in FIG. 5 when viewed from above.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 joint for fixing concrete form panel 2 joint body 3 fixing head 4 joint 10 concrete form panel 10 11 fixing groove 12 joint fitting groove 20 side panel

Claims (3)

[Claims] 1. A concrete formwork formed by a concrete formwork panel on the front and back surfaces and side surfaces forming a concrete wall surface, and a concrete formwork panel fixing joint disposed inside the concrete formwork panel, In the concrete form panel fixing joint, a fixing head having a T-shaped cross section or an inverted wedge shape is formed at an end portion which is in contact with and fixed to the concrete form panel surface which is the front and rear of the joint body. Inside the pair of front and back surfaces of the concrete form panel, a joint fitting groove for fitting to a fixing head of the concrete form panel fixing joint is formed. At least one of the concrete formwork panels is formed along a straight line that can slide up and down or left and right. A concrete formwork characterized by: 2. A concrete form panel fixing joint for fixing the concrete form panels on the front and back surfaces at predetermined intervals inside a pair of concrete form panels on the front and back surfaces. A joint for fixing a concrete form panel, wherein a fixing head having a T-shaped cross section or an inverted wedge shape is formed at a fixed contact end portion with the concrete form panel. 3. The concrete form panel fixing joint is formed by bending a metal strip along a periphery of at least a T-shaped or inverted wedge-shaped fixed contact end portion with the concrete form panel. The joint for fixing a concrete form panel according to claim 2, wherein a joint portion of the metal strip is formed on at least one of the fixed contact end portions.