JPH0364667B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a rectangular frame for forming a rectangular hole for providing a window, a door, a switchboard, etc. in a concrete wall.

[Problem that the invention seeks to solve]

The present invention is a related application for ``Method for forming square holes in concrete walls and sheet materials used for carrying out this method'' filed on the same day by the present applicant, and is related to the application filed on the same day by the present applicant. This was done to increase the strength and to easily and inexpensively manufacture rectangular frames of various sizes on site that correspond to rectangular holes formed in concrete walls.

[Means for solving problems]

The rectangular frame for forming a rectangular hole in a concrete wall according to the present invention is made by assembling sheet materials so that the cross section is a right triangle to form a triangular cylinder, and using this triangular cylinder with the swash plate part inside. The rectangular frame body is made up of a rectangular frame body; and a reinforcing body is housed in a triangular cylinder constituting the rectangular frame body.

[Embodiment] An embodiment of the present invention is shown in FIGS. 1 to 7.

The rectangular frame of the present invention includes a rectangular frame main body F in which a triangular cylinder is formed by assembling sheet materials so that the cross section becomes a right triangle, and four sides are formed by this triangular cylinder with the swash plate portion inside; It consists of a reinforcing body R installed inside a triangular cylindrical body constituting this rectangular frame main body.

First, the sheet material P for forming the rectangular frame body F will be explained. This sheet material P is made of, for example, waterproof cardboard.

The sheet material P is a strip-shaped thin plate as shown in FIG. Parts 1, 2, 3, and 4 are L ₁ , L ₂ , and
It has a width of L ₃ and L ₄ . The width L ₂ of the side plate portion 2 is the wall thickness of the concrete wall W.

First bending lines 5, 6, 7 are provided in the longitudinal direction at the boundary portions of each plate portion 1, 2, 3, 4, and the side plate portion 2 is provided at regular intervals. A large number of second bending lines 8 are provided in the width direction.

On the bottom plate part 1, two perforated lines 9, which are inclined at 45 degrees in different directions with respect to the width direction so as to intersect at one end of the bending line 8, are continuous in the length direction at a constant interval. It is provided.

Therefore, the angle formed by the perforation lines 9 that are inclined in different directions is 90°, so that when assembling the sheet material P to form the rectangular frame F,
It is arranged so that adjacent sides among the four sides constituting the square can easily maintain right angles.

Further, the swash plate portion 3 and the fixed plate portion 4 have two cut lines 10 that are inclined in different directions with respect to the width direction so as to intersect at the other end of the bending line 8.
are provided continuously in the length direction at regular intervals. Cutting lines 10 inclined in different directions
The angle θ is set so that adjacent swash plate portions 3 do not interfere with each other when the rectangular frame F is formed by assembling the sheet materials to have a right triangular cross section.

Then, as shown in FIG. 2, the sheet material P is cut into a length corresponding to the size of the rectangular hole 17 to be formed in the concrete wall W (the vertical and horizontal lengths are A and B, respectively). In addition, the square holes 1 in the bottom plate part 1 and the swash plate part 3 of the cut sheet material
The portions corresponding to the respective corner portions of 7 are cut out in a V-shape along the respective cutting lines 9 and 10.

The cut sheet material P' has the same inner circumference length [2(A+B)] of the rectangular hole 17 to be formed in the concrete wall W, so the portions corresponding to the vertical and horizontal pieces of the rectangular frame body F are Two pieces are provided alternately.

In addition, FIGS. 4 to 6 show various reinforcing bodies R that are made of the same sheet material as the rectangular frame main body F and that are internalized in a triangular cylinder D, which will be described later, and that constitutes the four sides of the rectangular frame main body F. ₁ , R ₂ , and R ₃ are shown.

The reinforcing body R ₁ has a configuration in which right triangular reinforcing plates 12 are provided perpendicularly to the bottom plate 11 at both ends of the bottom plate 11 . The reinforcing body R ₂ is formed by forming a notch 13 at the tip of the reinforcing plate 12 of the reinforcing body R ₁ and connecting the opposing reinforcing plates 12 via this notch 13. In this state, the rectangular frame When installed inside the main body F, the position of the reinforcing plate 12 is fixed and does not move, so the reinforcing effect becomes greater. Reinforcement body
R ₃ is the reinforcing plate 1 provided at both ends of the bottom plate 11
2' are connected by a side plate 14, and since the reinforcing plate 12' is also fixed in position and does not move, the reinforcing effect is increased.

Each of the reinforcing bodies R ₁ , R ₂ , R ₃ is installed inside the triangular cylinder D that constitutes the four sides of the rectangular frame main body F, so the reinforcing plates 12, 12' of each of the reinforcing bodies R ₁ , R ₂ , R ₃ are It is necessary that the shape corresponds to the cross-sectional shape of the triangular cylinder D (in principle, they are the same shape).

Further, the reinforcing body is not limited to an assembled sheet material as in each of the above embodiments, but may be a block body.

In order to assemble the cut sheet material P' into a rectangular shape and fix it to one of the formworks 15a, first follow the steps shown in FIGS. 3 and 7.
As shown in FIG.
Bend the adjacent side plate parts 2 so that they are perpendicular to each other, and bring the bottom plate part 1 into close contact with the plate surface of the formwork 15a.
While attaching the bottom plate 11 of R ₁ , the reinforcing plate 12
A large number of reinforcing bodies _R1 are placed on the bottom plate part 1 of the sheet material P' so that R1 is perpendicular to the side plate part 2 of the sheet material P'.
are arranged, and the bottom plate part 1 of the sheet material P' and the bottom plate 11 of the reinforcing plate _R1 are overlapped and fixed to the formwork 15a using nails 16.

Next, the swash plate part 3 of the sheet material P' is bent inward through the first bending line 6, and the fixing plate part 4 provided at the end of the sheet material P' is attached to the end of the bottom plate part 1. When the fixing plate part 4 is fixed to the formwork 15a using the nails 16, the sheet material P' is assembled into a frame shape and forms a rectangular frame body F, as shown in FIG. 7B. At the same time, a large number of reinforcing bodies _R1 are installed inside this rectangular frame main body F.

This rectangular frame main body F has four sides composed of a triangular cylinder D formed by assembling sheet materials P' so that the cross section becomes a right triangle.

Next, as shown in FIG.
Concrete C is poured between 5b, and after the concrete C has hardened, both formworks 15a and 15b and the rectangular frame body F are removed.

Now, as shown in Figure 7D, the sheet material
A rectangular hole 17 is formed in the concrete wall W with a wall thickness corresponding to the width L ₂ of the side plate portion 2 of P'.

Here, a large number of reinforcing bodies are attached to a triangular cylinder D whose cross section is a right triangle and which constitutes the four sides of the rectangular frame main body F.
R ₁ is installed inside, and the reinforcing plate 12 of this reinforcing body R ₁
is arranged perpendicularly to the side plate 2 of the rectangular frame main body F, so this reinforcing plate 12
Since the square frame body F functions as a beam against the side pressure applied to the side plate portion 2 of the square frame body F during pouring, the pressure resistance strength of the square frame body F becomes extremely high.

In addition, the removal of the rectangular frame body F after the concrete C has hardened is extremely easy and quick since this rectangular frame body F and the reinforcing body _R1 built into the rectangular frame body F are both made of sheet material. can be done.

In the above embodiment, the length of the inner circumference of the rectangular hole 17 in which the sheet material P is formed in the concrete wall W [2]
(A+B)], so the parts corresponding to the vertical and horizontal pieces of the rectangular frame body to be assembled are two consecutive pieces each, but the sheet material P is cut into the rectangular hole 17. half the length of the inner circumference [A+
When assembling and fixing the sheet materials to the formwork 15a, two continuous sheet materials are used, each having one piece corresponding to the vertical and horizontal pieces of the rectangular frame main body that is to be cut and assembled into [B]. By connecting both, the rectangular frame main body original plate is assembled into a frame shape to form the formwork 15a.
It may be possible to make the work of fixing it easier.

Further, the sheet material for assembling the rectangular frame is not limited to the one having the first and second bending lines and the cutting line as in the above embodiment, but may have any structure. Good too.

〔Effect of the invention〕

The rectangular frame of the present invention includes a rectangular frame main body in which a triangular cylinder is formed by assembling sheet materials so that the cross section is a right triangle, and the four sides are constituted by the triangular cylinder with the swash plate portion inside. It consists of a reinforcing body built into the triangular cylinder that makes up the rectangular frame body, and the reinforcing body built into the triangular cylinder that makes up the rectangular frame body is inserted into the side plate of the rectangular frame body during concrete pouring. Since it functions as a beam against the lateral pressure applied to the wall, it has extremely high pressure resistance, and square frames of various sizes corresponding to the sizes of square holes to be formed in concrete walls can be easily and inexpensively created at work sites. It can be manufactured.

Furthermore, since the rectangular frame main body is made of sheet material, the rectangular frame main body can be easily and quickly removed after the concrete has hardened.

[Brief explanation of drawings]

FIG. 1 is a plan view of the sheet material P, and FIG. 2 is a plan view of the sheet material P, which is cut into a length corresponding to the size of the rectangular hole 17 formed in the concrete wall W.
The part corresponding to the corner part of this square hole 17 is
Figure 3 is a plan view of the sheet material P′ cut into a letter shape.
The perspective view of the bottom plate part 1 of the sheet material P′ and the bottom plate 11 of the reinforcing body R ₁ overlapped and fixed to the formwork 15a, and FIGS. 4 to 6 are respectively the reinforcing bodies R ₁ ,
A perspective view of R ₂ and R ₃ , Fig. 7 shows a rectangular hole 1 in a concrete wall W using a rectangular frame main body F and a reinforcing body R ₁ .
This figure shows the process of forming sheet material 7.
The figure shows the bottom plate part 1 of P' and the bottom plate 11 of the reinforcing body _R1 overlapped and fixed to the formwork 15a.
The rectangular frame body F with the reinforcing body _R1 inside is formed into a formwork 15.
A is a diagram showing the state in which the frame is fixed to A, and C is a diagram in which the other formwork 15b is erected on the rectangular frame main body F that is fixed to the formwork 15a, and concrete C is poured between the two formworks 15a and 15b. , d are diagrams with the formworks 15a, 15b and the rectangular frame main body F removed after the concrete C has hardened. [Explanation of symbols of main parts], D: triangular cylinder,
F: square frame body, P, P′: sheet material, R ₁ , R ₂ ,
R ₃ : Reinforcement body, W: Concrete wall, 1: Bottom plate part of sheet material, 2: Side plate part of sheet material, 3: Slant plate part of sheet material, 4: Sheet material fixing plate part, 5, 6,
7: First bending line, 8: Second bending line, 1
1: Bottom plate of the reinforcement body, 12, 12': Reinforcement plate of the reinforcement body, 13: Notch of the reinforcement body, 15a, 15b: Formwork, 16: Nail, 17: Square hole.

Claims (1)

[Claims] 1 A rectangular frame body in which a triangular cylinder is formed by assembling sheet materials so that the cross section is a right triangle, and the four sides are constituted by this triangular cylinder with the swash plate part inside; A rectangular frame for forming a rectangular frame on a concrete wall, characterized by comprising a triangular cylindrical body and a reinforcing body inside the triangular cylinder.