JPH0235863Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to concrete forms that are arranged facing each other with a predetermined distance apart and are interconnected by separators so as to maintain that distance.
In particular, it relates to concrete formwork that is excellent in durability and has high bending strength.

[Prior art] As one type of slope protection work, concrete is poured in a grid pattern on the slope, and the space surrounded by the poured concrete structure is planted with trees, or more concrete is poured within the frame. There are known construction methods.

As the concrete formwork used in such construction methods, formwork made of mesh wire mesh or corrugated paper has come to be widely used because it is lightweight, easy to handle, and can be provided at low cost.

By the way, as mentioned above, formwork made of corrugated paper has advantages such as being lightweight, easy to handle, and can be provided at low cost, but it has relatively low resistance to bending and is more durable than corrugated paper. When pouring concrete in a lattice pattern using formwork, there is a drawback that the horizontal lower side of the formwork is curved due to the weight of the concrete, and as a result, the horizontal part of the lattice-shaped concrete structure is also curved. Ta. To solve this problem, it is possible to place separators closely connected to each other, but the use of many separators increases the cost accordingly.
Moreover, it takes time to connect the formwork and the separator.

Therefore, the present applicant has previously proposed a method of increasing the bending strength of a form made of corrugated paper by inserting a round steel into the space formed by the flat plate and the corrugated liner that make up the corrugated paperboard. proposed (Utility Application No. 166501, 1982)
No. 84739).

According to this formwork, it is possible to prevent the formwork from bending or bending due to the weight of the concrete as much as possible without providing separators that connect the formworks together, but this method has the following problems. It was hot.

[Problem that the invention aims to solve] Because round steel is used as a reinforcing material for the formwork,
It is virtually impossible to make a hole in the round steel for passing the connecting tool to connect the formwork and the separator (the thickness of the round steel is limited, so it is impossible to make a hole large enough to pass the connecting tool through the round steel). ), a special construction must be used as a connecting device.

In addition, corrugated paper has poor water resistance, so it is usually treated with resin, but the water resistance is not necessarily sufficient, and the formwork made of corrugated paper is usually
Can only be used 3 times.

[Means for solving the problems] In order to solve the above problems, according to the present invention,
Concrete formwork is interconnected by separators so as to maintain a predetermined spacing, and the formwork includes two flat plates made of synthetic resin that are arranged approximately parallel to each other between the flat plates so that the flat plates are mutually connected. It consists of a number of connected synthetic resin belt-shaped liners, and a belt-shaped reinforcing plate is inserted into the space formed by the flat plate and the liner, and both flat plates of the formwork and the reinforcing plate are inserted into the space formed by the flat plate and the liner. Provided is a concrete formwork characterized in that a hole is formed through which a connecting tool of a separator that connects the formworks to each other is passed.

[Operations and Effects of the Invention] Since the formwork according to the present invention has the above configuration, the formwork is not only reinforced by the reinforcing plate and has increased resistance to bending, but also the connection between the formwork and the separator is improved. This can be done by simply passing the connecting tool through holes made in the flat plate and reinforcing plate that make up the formwork, making the connecting work easy and the configuration of the connecting tool simple. Furthermore, since the formwork is made up of a flat plate made of synthetic resin and a band-shaped liner made of synthetic resin, it has high water resistance and can be used significantly more times than a formwork made of corrugated paper. In carrying out the present invention, the strip-shaped reinforcing plate only needs to have a cross section other than circular, and intermediate ones, such as square ones, can be used.

Further, the reinforcing plate is preferably a metal plate.

[Embodiments] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In Figures 1 and 2, the number 1 indicates concrete formwork placed facing each other at a predetermined distance (only one formwork is shown, and the other formwork is not shown). are omitted), and are interconnected so as to maintain the spacing by a separator 2 as a whole.

The formwork 1 includes two flat plates 11 made of synthetic resin, and flat plates 11 arranged almost parallel to each other between the flat plates 11.
It consists of a large number of band-shaped liners 12 made of synthetic resin that interconnect the lines.

A band-shaped metal plate 14 is inserted into a space 13 formed by the flat plate 11 and the liner 12.
This metal plate 14 serves as a reinforcing plate against bending of the formwork 1.

Each flat plate 11 and metal plate 14 that constitute the formwork 1
A hole 15 is formed through which a connector 22 of the separator 2, which will be described later, is passed through, and in the illustrated embodiment, the hole 15 consists of a circular portion 15a and a groove portion 11b formed on the outer periphery of the circular portion 15a. .

The formworks 1 placed facing each other are connected to each other by separators 2 at two locations above and below in the width direction X and at an appropriate number of locations at appropriate intervals in the longitudinal direction Y. Two pieces are inserted into the space 13 of the formwork 1, and the holes 15 are also inserted in the width direction of the formwork 1.
There are two openings on the top and bottom, and an appropriate number of openings at an appropriate distance in the longitudinal direction Y.

Next, to explain the separator 2, the separator 2 can be roughly divided into a connecting rod 21, a connecting tool 22,
It consists of a coupling 23 connecting the connecting rod 21 and the connecting tool 22, of which the connecting rod 21 and the connecting tool 22 are made of metal, and the coupling 23 is made of synthetic resin.

The connector 22 connects the separator 2 to the formwork 1 and is made of round steel. As shown in FIG. A disk 24 having a tapered surface 24b is screwed together. From the side where the retaining protrusion 22a is formed, the connector 22 is passed through the hole 15 by aligning the retaining protrusion 22a with the groove 15b of the hole 15 formed in the formwork 1 and the reinforcing plate 14, and then passing the retaining protrusion 22a through the hole 15. By rotating the connector 22 to a position where the groove 15b of the hole 15 and the groove 15b of the hole 15 do not match, the connector 2
2 is attached to the formwork 1.

As mentioned above, the coupling 23 is made of synthetic resin and has a hollow shape, and the disk 24 of the connector 22 is fitted into the opening 23a on one side by utilizing the elasticity of the coupling 23.

The connecting rod 21 is made of round steel, and has a retaining protrusion 21a formed at each end thereof, and holes formed in the flat plate 11 and reinforcing plate 14 of the formwork 1 on the other side of the coupling 23. Hole 23b with the same shape as
are formed, and the connecting rod 21 and the coupling 23 are connected in the same manner as the formwork 1 and the connecting tool 22 are connected. Note that the size of the hole 23b is made larger than the thickness of the connecting rod 21, so that the connecting rod 21 can be inclined with respect to the coupling 23.

A hole 21b is formed near the end of the connecting rod 21, and a retaining pin 25 is inserted into the hole 21b to restrict movement of the connecting rod 21.

In use, the formworks are placed facing each other with a predetermined distance apart, and the connectors 22 of the separator 2 are connected to the holes 15 made in the flat plate 11 and reinforcing plate 14 of the formwork 1.
The formwork 1 is held at a predetermined interval by the separator 2.

After completing the laying of the formwork 1, concrete is poured between the formworks 1. When the concrete hardens, the formwork 1 is removed, but by pulling the formwork 1, the connector 22 is separated from the coupling 23, and the formwork 1 can be transported.

Then, pull out the coupling 23 using pliers or the like. At that time, any depressions left on the surface of the concrete structure are filled with mortar.

Note that the separator is not limited to the one shown in the drawings, and may be one in which a connecting rod is divided into two parts, and the length can be adjusted according to the interval between the molds.

4 to 7 show other embodiments of the connector according to the present invention, in which a formwork 1 and a band-shaped metal plate 1 are shown.
4 has the same configuration as the previous embodiment. Also hole 15
However, in this embodiment, the hole 15 is square. The connector, generally indicated by the reference numeral 30, is made of synthetic resin and has an enlarged head portion 31.
A hole 32 is bored in the head portion 31 .
The intermediate part 33 is large enough to pass through the hole 15, and a stopper 34 is bored inside it (on the concrete side), and the stopper 34 is connected to the enlarged head part 31.
4, the formwork 1 and metal plate 14 are sandwiched between them. Therefore, the connector 30 may be inserted into the hole 15 by utilizing the elastic deformation of the synthetic resin. A hole 36 into which the tip 2a of the separator 2 is inserted is bored in the inner handle 35. Therefore, the angle of the separator 2 can be adjusted freely. Further, a notch 37 is formed at the outer end of the handle 35 for removing the head portion 31 and intermediate portion 33 of the connector 30 when removing the formwork 1 after pouring concrete.
A thick piece 40 for fixing the formwork 1 so that it does not bend is inserted into the hole 32 of the head part 31, and the lower end of this thick piece 40 is preferably buried in the ground.

The effects of this embodiment are also substantially the same as those of the previous embodiment.

[Summary] As described above, according to the present invention, the reinforcing plates are inserted into the space of the formwork and connected using the separator connectors, so the formwork is not bent by the concrete, and the installation work is easy. It is.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention. Figure 1 is a sectional view of the formwork and separator showing the formwork connected by a separator, Figure 2 is a front view of the formwork, and Figure 3 A and B show the connection. 4 is a partial perspective view showing another embodiment; FIG. 5 is an overall perspective view of the embodiment shown in FIG. 4; 6 is a plan view of FIG. 5, and FIG. 7 is a side view of FIG. 6. 1... Formwork, 2... Separator, 11... Flat plate, 12... Liner, 14... Reinforcement plate, 21...
Connecting rod, 22... Connector, 23... Coupling.

Claims (1)

[Scope of utility model registration request] Concrete formwork is arranged facing each other with a predetermined distance apart and is connected to each other by a separator so as to maintain that distance. It consists of a large number of band-shaped liners made of synthetic resin that are arranged almost parallel to each other and interconnect the flat plates, and a band-shaped reinforcing plate is inserted into the space formed by the flat plates and the liners. What is claimed is: 1. A concrete formwork characterized in that both flat plates and the reinforcing plate of the formwork are formed with holes through which a connecting tool of a separator that connects the formwork to each other is passed.