JPS6312995B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a method of constructing a corner portion of a formwork using a wire mesh as a weir plate.

Prior Art In formwork that uses wire mesh as a weir plate, the wire mesh is bent and attached to the corners of the concrete structure to be constructed, and concrete is then poured.

However, at this corner, the wire mesh may bend due to the weight of the concrete, and the angle between the two sides of the corner may change.

For this purpose, as shown in Figure 1, at the corners of footing foundations etc. that are continuous with underground beams, a separator b is passed between opposing wire meshes a and a, and vertical end thickness c and horizontal end thickness d are attached to mounting brackets. It is adopted to support the wire meshes a and a by attaching them by means of e. However, separator b is wire mesh a, and reinforcing steel f installed between a
It is extremely tedious to sew it through.

Purpose of the Invention The present invention was made to solve the above-mentioned problems, and it is possible to construct a concrete structure with good appearance and as designed without bending the weir plates at the corners. The purpose of the present invention is to provide a construction method for formwork corner sections that is easy to construct.

Structure of the Invention The method for constructing a formwork corner according to the present invention is to attach a corner member across two sides of a weir plate at the corner, make the protruding part of the corner member protrude to the opposite side of the weir plate, and The above purpose is achieved by installing the

Embodiments Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

In the figure, A is a corner member, and the corner member A in FIG. 2 is a steel rod 1a bent near both ends at an obtuse angle, and a male screw 1c is screwed around the outer periphery of a protrusion 1b at both ends. A flange-shaped presser portion 1d is attached to the base end of each male screw 1c.

The corner member A shown in FIG. 3 has a bent plate 2a bent in an L-shape, and protrusions 2c each having a male screw 2b screwed onto both ends of the bent plate 2a. 2d are fixed and assembled into a generally triangular shape as a whole.

The corner member A shown in FIG. 4 has an L-shaped angle member 3a positioned vertically.
Holding plates 3b and 3 are spaced apart from each other for a certain period of time from the two sides of a.
b are similarly positioned in the vertical direction, and the angle member 3a and the presser plates 3b, 3b are connected by a connecting plate 3c. The holding plates 3b, 3b are connected by a steel rod 3d or the like, and a protrusion 3f having a male screw 3e is provided on the holding plates 3b, 3b.

Next, a method of constructing a corner portion using the corner member A as described above will be explained.

Fig. 5 shows the corner member A shown in Fig. 2.
This is the case when using .

The corner members A are attached from the inside to the two corners of the wire mesh 4, which is a weir plate. That is, the corner member A is spanned over two sides of the corner portion of the wire mesh 4, so that the end portion protrudes from the mesh. At this time, both ends with the male threads 1b are made to protrude at right angles to the wire mesh 4, respectively.

A channel steel 5, which is a vertical end with a long hole bored in the web surface, is brought into contact with the outside of the corner part, and the end of the corner member A is made to protrude from the long hole.

The channel steel 5 is fixed by screwing together the female thread of a mounting member 6 having a hole with a female thread at one end to the male thread 1b at the end of the corner member A. A C-shaped gripping member 7 is inserted into the other end of the mounting member 6 to grip a round pipe 8 having a thick horizontal end, and is fixed with a nut 9.

If the corner member A shown in FIG. 3 is used and the bending plate 2a is attached to the inside of the corner part of the wire mesh 4,
It is possible to support the corner part more accurately.

If the corner member A shown in FIG. 4 is used and the corner part is supported by the angle member 3a, and the corner member A is made to stand on its own, the work will be extremely easy.

Furthermore, the corner member A allows the corner portion to be made into a unit to facilitate construction.

That is, as shown in FIG. 6, a wire mesh 4 of a certain length is bent in advance into an L-shape, and channel steels 5 with long holes bored on the outside of the two corners are attached to each of the two corners. The corner member A shown in the figure is placed over the channel steels 5, 5. That is, the corner unit B is assembled by inserting both ends of the corner member A through the meshes and elongated holes of the wire mesh 4, protruding outward, and fixing them with the mounting members 6.

As shown in Fig. 7, this corner unit B is placed on the corner of the formwork, and the wire meshes 4 and 4 are stacked on the two sides of the wire mesh 4, respectively, and tied together with a binding wire. Channel steel 5 and round pipe 8 according to the procedure
Fix it and complete the construction of the corner part.

By forming the corner unit B in advance in this way and overlapping the wire meshes 4, 4 on both ends of the wire mesh 4 of the corner unit B, the trouble of bending the wire mesh 4 to fit the corner can be avoided. This makes construction extremely easy.

Furthermore, by using the corner members A, it becomes possible to assemble the formwork extremely easily.

In assembling a conventional formwork, a separator 10, as shown in FIG. 8, is used, which is a steel rod 10a, male screws 10b, 10b screwed onto both ends, and holding plates 10c, 10c attached. To explain the assembly of a formwork for constructing a footing foundation using this separator 10, the holding plate 1 of the separator 10 is
The length l between 0c and 10c is the wire mesh 4, 4 facing each other.
The distance l' between the two is the same. Therefore, in order to construct the footing foundation, four pieces of wire mesh 4a, 4 are required.
Using wire meshes b, 4c, and 4d, first erect the wire mesh 4a, attach the separators 10, 10 from the inside, then set the opposing wire mesh 4c as a back wall, and insert the separators 10, 10 from the inside. After that, the wire mesh 4b is set up and the separators 10' and 1 are inserted from the inside.
0', and finally, the opposite wire mesh 4d is erected as a return wall and the separators 10' and 10' are inserted.

However, if corner member A is used, wire mesh 4
A, 4b, 4c, and 4d can all be erected in advance and assembled into a rectangular shape, or a piece of wire mesh 4 can be assembled into a rectangular shape as shown in FIG. 10, and then assembled all at once.

That is, the wire mesh 4 is made to stand on its own, and the corner members A are attached to the corners in the manner described above. A channel steel 5 and a round pipe 8 are fixed to both ends of this corner member A, and a formwork is assembled. If necessary, the separator 10 from which the holding plates 10c and 10c have been removed may be inserted through the mesh of the wire mesh 4 made to stand on its own, and the channel steel 5 and the round pipe 8 may be fixed to both ends of the separator 10.

Effects of the Invention The present invention has the above configuration, and since the weir plate at the corner part is supported by the corner member,
It is possible to construct a concrete structure with a good appearance and as designed without bending the weir plate. Furthermore, there is no need to insert the separator between reinforcing bars, making construction extremely easy.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the construction state of a conventional underground beam and footing foundation, Figs. 2 to 4 are perspective views of corner members, Fig. 5 is a perspective view of an embodiment of the present invention, and Fig. 6 7 is a perspective view of the corner unit, FIG. 7 is a plan view of the construction state using the corner unit, FIG. 8 is a perspective view of a conventional separator, FIG. 9 is a plan view of the construction state of a conventional footing foundation, and FIG. The figure is a plan view of the construction state of a footing foundation using corner members, and FIG. 11 is a perspective view. A...Corner member, B...Corner unit, 1a...Steel bar, 1b...Protrusion part, 1c...Male thread, 1d...Press portion, 2a...Bending plate, 2b...
...Male thread, 2c...Protruding member, 2d...Steel bar, 3
a...Angle material, 3b...Press plate, 3c...Connecting plate, 3d...Steel bar, 3e...Male thread, 3f...
Projection part, 4... Wire mesh, 5... Channel steel, 6... Mounting member, 7... Gripping member, 8... Round pipe, 9...
Natsu, 10... separator.

Claims (1)

[Claims] 1. In a formwork that uses wire mesh as a weir plate, a corner member is attached to straddle the two sides of the weir plate at the corner to support the two sides, and the protruding part of the corner member is made to protrude to the opposite side of the weir plate. A method for constructing a corner part of a formwork, characterized by attaching a thick piece to the protruding part.