JPH0626668Y2 - Wooden formwork used to form right-angled surfaces in concrete structures - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a wooden formwork used for forming a right-angled surface in a concrete structure.

(B) Problems to be solved by the conventional technology and the present invention Conventionally, a formwork used to form a right-angled surface in a concrete structure is made by combining plate materials at right angles, and 90 degrees at both inner and outer corners of the combined part. Although a formwork with an angle is used, this type of formwork has the trouble of having to use a reinforcing material to reinforce it because the combined parts are easily separated, and for a long time. There was a drawback that it could not be used.

(C) Means for solving the problems In the present invention, in consideration of the above-mentioned drawbacks of the conventional formwork, plywood is used for the formwork, and any pressure is applied before the adhesive of this plywood is cured. Bending the plywood by means so that the outer corners are arcuate and the inner corners are right-angled, or the outer corners are arcuate and the inner corners are obtusely angled to the arcuate surface of the outer corners. After adhering an auxiliary material with a recess of the same shape as before,
Exclude parts other than those surrounded by line segments that intersect the extension of the horizontal surface and the extension of the vertical surface of the bending material as excess parts, form the outer corners at right angles, and then remove the outside surface of the bending material. The thin plate material is covered and adhered.

(D) Embodiments and Functions An embodiment of the present invention will be described below with reference to the drawings.

In the figure, (1) is a plywood in which a large number of thin plates (2) are bonded with an adhesive (3).

(4) is a bending material in which the plywood (1) is bent by a pressing means, and the outer corners are arcuate and the inner corners are right-angled.

Reference numeral (5) is an auxiliary material, and a recess (6) is provided on the back surface so as to match the arc-shaped outer corner of the bending material (4), and this recess (6) is bonded to the outer corner.

(7) indicates that the auxiliary material (5) adhered to the outer corner of the bending material (4) is enclosed by line segments (a) and (b) in which the extension of the horizontal surface of the bending material and the vertical surface are orthogonal to each other. Is a right-angled portion formed by cutting off the surplus portion (c) of FIG.

(8) is a thin plate material in which the outer corner of the bent material (4) is formed at a right angle and then the outer surface of the bent material (4) is covered.

Reference numeral (9) is an auxiliary rod formed in a triangular shape having an isosceles right-angled cross section with a concave portion (10) matching the arcuate surface of the outer corner portion of the bending material (4), and is made of synthetic resin, not limited to wood. In some cases.

Since the present invention is constructed as described above, when the mold according to the present invention is made, the plywood (1) is attached to the outer corner by an arbitrary pressing means such as pressing before the adhesive of the plywood is cured. Bending material (4) (form main body) is made by bending so that the inner portion is in an arc shape and the inner corner portion is at a right angle, and is prepared in advance on the arc-shaped surface formed at the outer corner portion of this bending material (4). After adhering the concave portion (6) having the same shape as the above-mentioned arcuate surface provided on the back surface of the auxiliary material (5), use line segments (a) and (b) in which the horizontal surface of the bending material and the extension of the vertical surface are orthogonal to each other. After the excess portion (c) other than the enclosed portion is scraped off to form a right angle portion (7) at the outer corner of the bent material, a thin plate material (8) is adhesively coated on the outer surface of the bent material (4). Form a right-angled mold for both the outer and inner corners, or fit the arc-shaped surface formed in advance on the outer corner of the bending material (4). An auxiliary rod (9) having a right-angled triangular cross section having a concave portion (6) at the bottom is prepared, and the concave portion (10) of the auxiliary rod (9) is bonded to the outer corner portion of the bending material to easily form the outer corner portion. Both the inner corner and the inner corner form a right-angled mold.

In addition, it is not always necessary to form a bent material in an arc shape at the outer corner and at a right angle to the inner corner, and even a bent material in which the outer corner is bent in an arc shape and the inner corner is made an obtuse angle is formed in the outer corner. There is a case in which a right-angled portion is formed at the outer corner of the bent material by using an auxiliary material provided with a concave portion matching the arcuate surface or an auxiliary rod having a right-angled triangular cross section.

No matter which means is used, a right angle is formed at the outer corner of the bent material, so when using this bent material (form), the right angled surface can be easily and accurately formed in the concrete structure. It is a thing.

(E) Effect of the invention In the invention, as described above, the plywood is bent using the pressing means,
It is made of a bending material with the outer corners arcuately formed and the inner corners at right angles, so it is robust and does not become damaged, but an auxiliary plate or auxiliary rod is attached to the arcuate surface of the outer corners of this robust bending material. Since the arc-shaped surface is formed at a right angle by adhering, and the thin plate material is adhered to the outer surface of the bent material by covering it, the outer corner of the bent material maintains a right angle for a long time. Since it does not collapse, when the formwork according to the present invention is used, it has a feature that a right-angled surface can be easily and completely formed in a concrete structure.

[Brief description of drawings]

FIG. 1 is a perspective view of plywood. FIG. 2 is a partially cutaway perspective view of a bent material obtained by bending a plywood. FIG. 3 is a partially cutaway perspective view showing a state in which an auxiliary material is bonded to the outer corner of the bent material. FIG. 4 is a partially cutaway perspective view of the mold according to the present invention in which the outer corners of the bent material are formed at right angles. FIG. 5 is a perspective view of the auxiliary rod. In the figure, (1) is plywood. (4) is a bent material. (5) is an auxiliary material. (6) is a recess. (7) is a right angle part. (8) is a thin plate material. (9) is an auxiliary rod. (10) is a recess. (A) and (b) are line segments. (C) is a surplus part.

Claims (1)

[Scope of utility model registration request] 1. A bend formed by bending a plurality of thin plates with an adhesive by applying pressure by an arbitrary pressurizing means before the adhesive of the plywood is hardened to bend the outer corners into an arc shape and the inner corners at a right angle. Adhesive auxiliary material with a concave portion of the same shape on the back side is attached to the arc-shaped surface formed at the outer corner of the material, and this auxiliary material is a line orthogonal to the extension of the horizontal surface and the extension of the vertical surface of the bent material. Used to form a right-angled surface on a concrete structure by scraping off excess parts other than those enclosed by minutes, forming a right angle at the outer corner, then covering the outer surface of the bent material and bonding a thin plate material. Wooden formwork to do.