JPH0882093A - Concrete formwork - Google Patents

Abstract

PURPOSE: To ensure a smooth and quick formwork assembling operation by reducing the work required for connection through a decrease in the number of connectors, such as clips and bolts, for use in the assembly of the formwork. CONSTITUTION: Outer peripheral ribs 3, 9, provided at the outer edges of an octagonal form 1 and a square form 2, respectively, are provided with respective recessed parts 5, 11 and projecting parts 6, 12 that alternate with each other, and the projecting and recessed parts of the square form 2 are fitted with the recessed and projecting parts of the octagonal form 1 to connect the adjacent forms together. Connectors 15 are attached to their connecting parts to bring the recessed and projecting parts close to each other to provide a form surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used as a formwork for constructing wall surfaces such as wall columns of various concrete structures.

[0002]

2. Description of the Related Art No matter what kind of formwork is used, a concrete formwork used when constructing a concrete structure must always have clips, bolts or nails when connecting adjacent formwork. Although it must be used, the joint between the molds is a point that reduces the rigidity of the entire mold surface, and in many cases this joint becomes a weak point,
This is the place where the formwork flexes when pouring concrete. In particular, when connecting rectangular formworks, the joint joints of the formwork are in a straight line, so the low rigidity of the connection at the connection part has a great effect, and the formwork surface as a whole The rigidity of is also considerably reduced. Further, although nails are used to connect the wooden formwork, it is only to prevent the surfaces from being displaced, and a large number of thick pieces are required to reinforce the formwork. Hexagonal and octagonal molds were devised to correct this point, but the weak points of the entire mold surface still appear at this joint, causing a decrease in joint rigidity. Therefore, many clips are used or bolts are tightened to strengthen the connection part of the form, but in the case of clips, it is troublesome, but only by preventing the displacement of the surfaces, it is useful for improving the connection rigidity. Not not. Further, in the case of bolt tightening, the connection rigidity is improved by tightening at two or more points on one side, but bolt tightening is a very troublesome and troublesome work.

[0003]

Therefore, according to the present invention, the rigidity of connection between molds is improved, and the number of connecting tools such as clips and bolts required for connecting the molds is reduced,
(EN) It is possible to provide a concrete formwork by which the work of connecting formwork is reduced and the work of assembling the formwork is smooth and quick.

[0004]

The structure will now be described with reference to the drawings. As shown in FIG. 1, recesses 5 are provided on every other side of an outer peripheral rib 3 provided on the outer edge of an octagonal mold 1. The convex portions 6 are provided on the remaining outer peripheral ribs. In addition, as shown in FIG. 2, the outer peripheral rib 9 of the quadrangular frame has the same shape as the octagonal frame.
By alternately providing the concave portions 11 and the convex portions 12, as shown in FIG.
The mold surface is formed by fitting the convex and concave portions of the square mold into the concave and convex portions of the octagonal mold. Further, at this time, the connector 15 is attached to the formwork connecting portion so that the protruding portion can be closely joined to the recessed portion.

[0005]

Since the present invention has the above-described structure, as shown in FIG. 3, when assembling the formwork, the convex part 12 of the square formwork 2 is fitted into the recessed part 5 provided in the octagonal formwork 1. Then, the convex portion 6 of the octagonal mold 1 is fitted into the concave portion 11 of the square mold 2, and the mold surfaces are formed while sequentially connecting the adjacent molds. Further, since the connecting portion of the formwork is fixed by the connecting tool 15, the concave portion and the convex portion are firmly engaged with each other to form an integrated body, and the formwork does not shift back and forth, and the lateral concrete lateral pressure Also, the rigidity of the mold surface can be sufficiently maintained.

[0006]

Embodiments of the present invention will be described with reference to the drawings. (A) As shown in FIG. 3, the connecting portions between the molds have the convex portions fitted in the concave portions, so that the octagonal shape is obtained. The form and the square form and the octagonal form and the octagonal form are not displaced, and the rigidity of the form surface can be sufficiently maintained even when concrete is placed. In this case, a separator is inserted in the formwork surface so that the width of the facing formwork can be maintained according to the lateral pressure of the concrete. (B) If the octagonal form and the square form are made of synthetic resin by integral molding, they will be lighter, easier to carry and easier to assemble. Alternatively, convex portions may be provided on every other side of the outer peripheral rib of the octagonal mold, and only concave portions may be provided on the outer peripheral rib of the square mold. Conversely, concave portions may be provided on the octagonal mold, and convex portions may be formed on the rectangular mold. Only one may be provided. (C) Further, the orientation of the octagonal and quadrangular molds is arbitrary, and the quadrangular molds may be used diagonally as in the present example of FIG. 8 or the quadrangular molds as in FIG. The frame may be used sideways to assemble. (D) In this example, the octagonal frame and the square frame are combined, but the present invention is not limited to this combination. For example, a combination of square formwork may be used. In addition,
As long as the molds can be connected to each other and the adjacent molds can be held, the shapes of the recesses and the protrusions of the connecting portion do not matter.

[0007]

Therefore, according to the present invention, since the molds are connected to each other with the concave portions and the convex portions firmly meshing with each other, the mold frame connecting portions have a strong lateral connection. The rigidity of the mold surface can be sufficiently maintained even when pouring concrete. Further, when assembling the molds, the protrusions may be fitted into the recesses of the respective molds to be connected, and the connecting tool may be attached at one position on each side so that the recesses and the protrusions are not separated. Therefore, the number of connecting tools used is significantly reduced compared to the case of clip striking and bolt tightening, and the troublesome work of clip striking and bolt tightening can be reduced,
The formwork can be assembled smoothly and quickly.

[Brief description of drawings]

FIG. 1 is a perspective view showing a usage state of the present invention.

FIG. 2 is a rear view showing the octagonal mold of the present invention.

FIG. 3 is a side view showing an octagonal mold of the present invention.

FIG. 4 is a rear view showing a square frame of the present invention.

FIG. 5 is a side view showing a square formwork of the present invention.

FIG. 6 is a rear view showing a state where the conventional octagonal and quadrangular formwork is assembled using clips.

FIG. 7 is a rear view showing a state in which conventional octagonal and square formwork is assembled using bolts.

FIG. 8 is a rear view showing a state in which a quadrangular frame is used in a diagonal direction in the embodiment of the present invention and assembled.

FIG. 9 is a rear view showing a state in which a square mold is used in a horizontal direction and assembled in the embodiment of the present invention.

[Explanation of symbols]

 1 Octagonal Formwork 2 Square Formwork 3,9 Outer Rib 4,10 Inner Rib 5,11 Recess 6,12 Convex 7,13 Face Plate 8,14 Circular Hole 15 Metal Fitting

Claims (2)

[Claims] 1. An octagonal formwork, which is used as a formwork when constructing a wall surface such as a wall pillar of a concrete structure, and is formed of a quadrangle having a length equal to one side of the octagon. Octagonal formwork in which concave portions 5 and 11 and convex portions 6 and 12 are alternately provided on outer peripheral ribs 3 and 9 provided on the outer edges of the mold 1 and the square mold 2, respectively, and the convex portions are fitted into the concave portions. A concrete formwork characterized by being able to assemble the formwork while connecting 1 and the square formwork 2. 2. The concrete formwork according to claim 1, wherein a connecting portion between the formwork is reinforced by a connecting tool 15 in order to tightly join the concave portion and the convex portion.