JPS6397765A - Square frame for forming square hole to concrete wall - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

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 of forming square holes in concrete walls and sheet materials used to carry out this method'' filed on the same day by the present applicant, and is related to the compressive strength of the square frame during concrete pouring. The purpose of this design was to increase the size of the rectangular holes to be formed in concrete walls, and to easily and inexpensively manufacture rectangular frames of various sizes on site to correspond to the rectangular holes to be formed in concrete walls.

[Means for solving problems]

The rectangular frame of the present invention has 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 the triangular cylinder with the swash plate portion inside; It consists of a fixture that is attached to the outer surface of the rectangular frame main body and includes a fixing part that is fixed to one formwork and a piercing body that pierces the other formwork.

〔Example〕

Embodiments of the invention are shown in FIGS. 1-5.

The rectangular frame of the present invention consists of a rectangular frame main body F made of sheet materials assembled into a rectangular shape, and metal fixtures S for fixing the rectangular frame main body F to the molds 15a and 15b. 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. Part 1.2.3.
4 are Ll, Lx, and Ls, respectively.

It has the width of J4. The width (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 boundaries of each plate part 1.2.3.4, and the side plate parts 2 are 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 456 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 inclined in different directions is 90@, so that when assembling the sheet material P to form the rectangular frame main body F, the adjacent sides of the four sides constituting the rectangular frame main body F This makes it easy to maintain right angles between the two sides.

Further, on the swash plate portion 3 and the fixed plate portion 4, two cut lines 10 are provided at a constant interval and are inclined in different directions with respect to the middle direction so as to intersect at the other end of the bending line 8. They are provided continuously in the length direction. The angle θ formed by the perforation lines 10 inclined in different directions is set at such an angle that adjacent swash plate portions 3 do not interfere with each other when the sheet materials are assembled into a right triangle shape to form the rectangular frame body F. It is.

As shown in FIG.
, B)), and at the same time, cut the sheet material P to a length corresponding to the cut sheet material, and cut the portions of the cut sheet material corresponding to a part of each corner of the square hole 17 in the bottom plate part 1 and the swash plate part 3. Cut each into a V-shape along the cutting lines 9 and 10.

The cut sheet material P° is the same as the inner circumference length 2 (A+B)) of the square hole 17 formed in the concrete wall W, so the portions corresponding to the vertical and horizontal pieces of the square frame body F are 2
They are arranged alternately for each individual.

Further, a metal fixture S for fixing the rectangular frame body F to the forms 15a and 15b is shown in FIG.

This fixture S is formed by bending a metal plate, and has first piercing bodies 12 that are inserted into the swash plate portion 3 of the rectangular frame body F at both ends of the tip of the main body plate 11. are provided downward with a predetermined gap between them, and
A second piercing body 13 is provided at the center of the tip of the main body plate 11 to be pierced into the formworks 15a and 15b, facing upward along the same plate surface as the main body plate 11, and a fixing plate 14 is provided at the lower end of the main body plate 11. is provided substantially perpendicularly to the main body plate 11. The height of the main body plate 11 of this fixture S is approximately the same as the width L2 of the side plate portion 2 of the sheet material P'.

In order to assemble the sheet material P'' into a rectangular shape and fix it to one of the formworks 15a using the fixture S, first, as shown in FIG.
As shown in a), the bottom plate part 1 is bent along the first bending line 5 so that the bottom plate part 1 is substantially perpendicular to the side plate part 2, and the bottom plate part 1 is bent along the second bending line 8. Then, the adjacent side plate parts 2 are bent so that they are perpendicular to each other, and the bottom plate part 1 is fixed to the plate surface of the formwork 15a using nails 16.

Next, the sheet material P is inserted through the first bending line 6.

At the same time, bend the swash plate part 3 inward, overlap the fixing plate part 4 provided at the end of the sheet material P'' with the end of the bottom plate part 1, and use the nails 16 to fasten the fixing plate part 4. When fixed to the formwork 15a, as shown in FIG. 5(b), the sheet material P
A rectangular frame main body F assembled into a rectangular shape is fixed to the formwork 15a with nails 16.

The four sides of this rectangular frame main body F are constituted by a triangular cylinder made by assembling sheet materials P' so that the cross section becomes a right triangle.

Next, as shown in FIGS. 3 and 5 (c), the first piercing body 12 of the fixture S is pierced into the swash plate portion 3 of the rectangular frame main body F fixed to the formwork 15a. Along with this, the main body plate 11
The fixing plate 14 is fixed to the formwork 15a using nails 16 in a state in which the fixing plate 14 is brought into close contact with the plate surface of the side plate part 2 of the rectangular frame main body F. As shown in FIG. 3, a large number of fixtures S are attached to the rectangular frame main body F at predetermined intervals over the entire circumference.

Then, when the other formwork 15b is erected and strongly pressed against the rectangular frame main body F fixed to the formwork 15a using the fixture S and the nails 16, it is fixed as shown in FIG. 5(d). A second piercing body 13 provided at the tip of the main body plate 11 of the tool S
pierces the formwork 15b. With this, the rectangular frame main body F is fixed to a large number of fixtures S via the first piercing body 12 of the fixture S, and a large number of fixtures S are fixed to both opposing formworks 15a and 15b. As a result, the entire circumference of the rectangular frame main body F is surrounded, and the rectangular frame main body F is surrounded by both formworks 15a and 1.
5b.

In this state, concrete C is placed between both formworks 15a and 15b.
After concrete C has hardened, both formworks 15a, 1
5b and the square frame body F.

Now, as shown in Fig. 5 (E), the silt material P°
A rectangular hole 17 is formed in a concrete wall W having a wall thickness corresponding to the inner wall 1.1 of the side plate portion 2.

As described above, the first
Since the rectangular frame main body F is fixed via the piercing body 12,
The rectangular frame main body F is fixed to both the molds 15a and 15b, and the fixing strength of the rectangular frame main body F to both the molds 15a and 15b becomes extremely large. As a result, concrete c
The pressure resistance strength against the side pressure applied to the side plate portion 2 of the rectangular frame main body F during casting becomes extremely high.

Further, the removal of the rectangular frame main body F after the concrete C has hardened can be carried out extremely easily and quickly since the rectangular frame main body F is composed of a sheet material.

In the above embodiment, since the sheet material P is cut to the same length as the inner circumference length [2(A+B)) of the square hole 17 formed in the concrete wall W, the square frame to be assembled is The parts corresponding to the vertical and horizontal pieces of the main body are two consecutive pieces each, but the square frame main body to be assembled by cutting the sheet material P into half the inner circumference of the square hole 17 into lengths A+B] Two continuous sheet materials are used, each having a portion corresponding to a vertical piece and a horizontal piece, and these sheet materials are assembled to form a formwork 15a.
By connecting the two when fixing to the frame 15a, it may be easier to assemble the sheet material into a frame shape and fix it to the formwork 15a.

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 has 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 the triangular cylinder with the swash plate portion inside; It consists of a fixing part that is attached to the outer surface of the square frame body and is fixed to one formwork, and a fixture that has a piercing body that pierces the other formwork, so that the square frame body is fixed to both formworks. As a result, the fixing strength of the rectangular frame main body to both formworks becomes extremely large, and as a result, the pressure resistance strength against the side pressure applied to the side plates of the rectangular frame main body during concrete pouring increases, and the sheet material is Since the rectangular frame main body is formed by assembling the rectangular frame body, temporary frames of various sizes corresponding to the sizes of the rectangular holes to be formed in the concrete wall can be easily and inexpensively manufactured at the work site.

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 the drawing]

FIG. 1 is a plan view of the sheet material P, and FIG. 2 is a plan view of the sheet material P.
A sheet material P° is cut into a length corresponding to the size of a rectangular hole 17 to be formed in the concrete wall W, and a portion corresponding to a part of the corner of this rectangular hole 17 is cut into a V-shape.
The top view of Figure 3 shows the formwork 1 using a number of fixtures S.
5a is a perspective view of the square frame main body F fixed to the frame 5a, FIG. 4 is a perspective view of the fixture S, and FIG. This is a diagram showing a process of forming a rectangular hole 17 in a concrete wall W using a large number of fixing tools S for fixing. (b) is a diagram showing a rectangular frame main body F made of sheet material P° assembled into a frame shape is fixed to the formwork 15a using nails 16, 3(C) is a diagram showing the fixture S fixed to the formwork 15a by piercing the first piercing body 12 of the fixture S into the swash plate portion 3 of the rectangular frame main body F, and FIG. The second piercing body 13 of the fixture S is pierced into the other formwork 15b and concrete c is cast between both formworks 15a and 15b. It is a diagram with frames 15a and 15b removed. [Explanation of symbols of main parts] D = Triangular cylinder F: Square frame main body P, P': Sheet material S: Fixture W = Concrete wall 1: Bottom plate part of sheet material 2: Side plate part of sheet material 3 Co-sheet material Swash plate part 4: Fixing plate part 5.6.7 of sheet material: First bending line 8: Second bending line 11: Main body plate 12 of the fixture: First piercing body 13 of the fixture : Second piercing body 14 of the fixture: Fixing plate (fixing part) of the fixture 15a, 15b: Formwork 16: Nail 17: Square hole ε (B) (C) Figure 5 (D) (E)

Claims (1)

[Claims] 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 the triangular cylinder with the swash plate part inside; the outer surface of the rectangular frame main body; A rectangular frame for forming a rectangular hole in a concrete wall, comprising: a fixing part that is attached to a concrete wall and is fixed to one formwork, and a fixture that has a piercing body that pierces the other formwork.