JPH06280334A - Connection structure of permanent form for concrete construction and connection metal fitting of the form - Google Patents

Abstract

PURPOSE:To easily carry out connection of a form without using a complicated fastening metal fitting and to facilitate assembly of the form constituting a corner part of a building concerning a permanent form for concrete construction. CONSTITUTION:This is a band type base plate 1A, and the extensional direction of both ends 1B, 1B in the cross direction is matched with the connection direction of a permanent form 10 for concrete construction. A connection metal fitting 1 provided with engagement pieces 2, 2 with elasticity respectively on the both ends 1B, 1B in the cross direction is engaged with an end face 10B of the permanent form 10 for concrete construction provided with a recessed groove 11 having irregularities 11A, 11A to engage with the engagement pieces 2, 2 impossible to extract. Through this connection metal fitting 1, the permanent form 10 for concrete construction is connected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure and connection fitting for a permanent formwork for concrete work.

[0002]

2. Description of the Related Art Generally, when building a concrete wall, a mold made of plywood or the like is used. However, since these molds are made of plywood and use natural materials, even if they are repeatedly used, they will eventually be disposed of, and the amount used in a single construction work will be very large, which makes them very natural. The consumption of materials is significant, and their use must be restricted from the viewpoint of protecting the natural environment.

From such a point of view, a permanent formwork made of fiber reinforced cement for concrete work has been proposed, and it has been proposed to use it instead of a conventional plywood formwork (for example, Japanese Patent Laid-Open No. 3-293473). . This kind of concrete formwork has the advantage that it does not use natural resources such as wood, and because it eventually integrates with the concrete to be placed, it becomes integrated with the walls or columns of the building structure as it is. This has the advantage that the subsequent frame removal work can be omitted.

[0004]

[Problems of the prior art] However, the permanent formwork for concrete work has a drawback that it is difficult to nail and fix it during the frame work because the material is hard, so that it is necessary to connect the formwork. , The use of specially shaped connection fittings, or by pre-planting bolts in the concrete formwork or drilling bolt insertion holes, and using these to fasten, the former is done. In the case of 1, the management and handling of the connection fittings are troublesome, and in the latter case, if there is an error in the mounting position, the positions of the bolt holes are displaced and the mounting work is very troublesome. Also, when it becomes necessary to cut the formwork according to the size of the building, the concrete wall formwork is hard and brittle, so it is not easy to cut it, and once cut, the engagement step part of that part disappears. Therefore, there is a drawback that joining with other concrete wall formwork is very troublesome.

[0005]

SUMMARY OF THE INVENTION In view of the above problems, the present invention is a permanent formwork for concrete construction, in which the formwork can be easily connected without using complicated fasteners and the like, and the corners of a building can be easily connected. The purpose of the present invention is to provide a connection structure for a permanent formwork for concrete construction, which can be easily assembled by assembling the formwork forming the parts, and a connection fitting thereof.

[0006]

That is, the connection structure of the permanent formwork for concrete work of the present invention is a strip-shaped substrate, and the extension directions of both ends in the width direction coincide with the connection direction of the permanent formwork for concrete work. And a connection metal fitting provided with elastic engaging pieces at both ends in the width direction, a permanent formwork for concrete construction having concave grooves having concaves and convexes on the inner surface for engaging with the engaging pieces so as not to slip out. And a permanent formwork for concrete work is connected via the connection fitting.

Another aspect of the present invention relates to a connecting fitting used in the above connecting structure, in which a strip-shaped base plate has extension directions at both ends in the width direction aligned with a connecting direction of a permanent formwork for concrete work, Characterized in that each of them is provided with an elastic engaging piece,

Another aspect of the present invention relates to another connecting fitting, wherein one piece of a long board, which has an L-shaped cross section and whose width is substantially equal to the thickness of a permanent formwork for concrete construction, is the same. On the outer surface, the other piece is provided with ribs projecting on the inner surface thereof along the center line in the width direction, and at the tips of the ribs, elastic engaging pieces are provided, respectively.

[0009]

Embodiments of the present invention will be described below. 1 is an enlarged sectional view of an essential part of an embodiment of the present invention, FIG. 2 is an explanatory view of the embodiment, FIG. 3 is a sectional view of an embodiment of a fixing member, and FIG. 4 is an end view of another embodiment.

The connection structure of the permanent formwork for concrete construction of the present invention is a strip-shaped substrate 1A having both ends 1 in the width direction.
The extending direction of B and 1B is the same as the connecting direction of the permanent formwork 10 for concrete construction, and the connecting fitting 1 provided with elastic engaging pieces 2 and 2 at both ends 1B and 1B in the width direction,
Concavities and convexities 11A, 11A that are engaged with the engagement pieces 2 and 2 so as not to slip out.
The permanent mold 10 for concrete work is fitted to the end face 10B of the permanent mold 10 for concrete work provided with the concave groove 11 having an inner surface, and the permanent mold 10 for concrete work is connected via the connection fitting 1.

Further, as shown in FIG. 1, the permanent mold 10 for concrete work used in the connection structure of the permanent mold for concrete work has a hollow hole 13 in its wall thickness. Concavities and convexities 11A that can be engaged with the engaging pieces 2 and 2 on the inner wall surface of the
, 11A are used, and when it is necessary to cut the permanent formwork 10 for concrete construction, this hollow hole 13 is cut so as to be opened. Figure 2 shows a construction example,
Although the hollow holes 13 are omitted in order to simplify the drawing, it shows a state in which a form such as a pillar S or a wall surface W is connected by the connection structure of the present invention.

FIG. 3 shows a connection tool 1 for a permanent formwork for concrete work used in the connection structure for a permanent formwork for concrete work, which is a strip-shaped base plate 1A extending in the width direction at both ends 1B, 1B. Is a permanent formwork for concrete construction
It is configured to be provided with engaging pieces 2 and 2 having elasticity, which are aligned with the connecting direction of 10 and are provided at both ends 1B and 1B in the width direction.

In the above-described embodiment, the case where the connecting fitting 1 is bent at a substantially right angle as the extending direction is shown, but the same can be carried out even if it is a straight one as shown in FIG. Further, in the figure, 1C shows a guide plate interposed at the connection interface of the permanent formwork 10 for concrete construction to be connected, which is provided as necessary.

Further, as shown in FIG. 5, the connecting fitting 1 for mere butt joining has an L-shaped cross section, and the width B of each piece 3A, 3B is the thickness B of the permanent formwork 10 for concrete work. One end of the long substrate 3 having approximately the same width has ribs 4 and 4 protruding from the outer surface 3A 'thereof and the other piece of the inner surface 3B' along the center line in the width direction. For this, those provided with elastic engaging pieces 2 are used.

Incidentally, the connection fitting 1 shown as the above embodiment.
The engagement pieces 2 and 2 in FIG. 3 may be doubled or multiple as shown by the chain line in FIG. 3 or 4, and as the shape thereof, as shown in FIG. Is also good. In this case, from one metal plate to the engaging pieces 2, 2
Since it can be molded by bending, it is convenient and easy to manufacture. Each of the connecting fittings 1 is formed by bending a thick metal plate or welding these.

[0016]

In the connection structure of the permanent formwork for concrete work of the present invention, the permanent formwork for concrete work 10 to be connected
Are connected to each other via a connecting fitting 1 that fits into a recessed groove 11 formed on an end face in a manner that cannot be slipped out. At the time of connection work, the engaging piece 2 of the connecting fitting 1 is forced into the recessed groove 11. All you have to do is to insert it in, and no further work such as screw tightening work is required. Also, a permanent formwork for concrete work 1
If it becomes necessary to cut the
If it is cut at a portion, the open hollow hole 11 becomes a new groove for engagement.

[0017]

As described above, according to the connection structure of the permanent formwork for concrete work of the present invention, the connection of the permanent formwork for concrete work is very easy and quick with one touch without requiring troublesome work. Even if the permanent formwork for concrete construction is cut at an arbitrary point, if the hollow hole is opened, connection can be made at that point. Further, since the connection fitting 1 extends at the connection interface, the fitting can prevent the poured concrete from flowing out, and also prevent the surface of the permanent formwork for concrete from being contaminated by the flowing-out concrete. Further, the connection fitting of the permanent formwork for concrete work of the present invention has various effects such as being easy to manufacture because it has a simple structure and can be provided at low cost.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view of an essential part of an embodiment of the present invention.

FIG. 2 is an explanatory diagram of an embodiment of the present invention.

FIG. 3 is a sectional view of an embodiment of the present invention.

FIG. 4 is an end view of another embodiment.

FIG. 5 is a sectional view of still another embodiment.

FIG. 6 is a perspective view of still another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Connection metal fitting 1A ... Strip-shaped board 1B ... Both ends in the width direction 2 ... Engagement piece 3 ... Long board 3A '... Outer surface 3B' ... Inner surface 4 ... Rib 10 ... Permanent formwork for concrete construction 10B ... Permanent for concrete construction End face of formwork 11A… Concave and convex 11… Concave groove 13… Hollow hole

Claims (3)

[Claims] 1. A connection fitting, which is a strip-shaped base plate, whose extension direction at both ends in the width direction is aligned with the connection direction of a permanent formwork for concrete construction, and elastic engaging pieces are provided at both ends in the width direction. Is fitted to an end face of a permanent formwork for concrete work provided with a concave groove having an uneven surface on the inner surface for fitting with the engaging piece so as not to slip out, and a permanent formwork for concrete work is connected via the connection fitting. Connection structure of permanent formwork for concrete construction characterized by being connected. 2. A strip-shaped base plate, wherein extension directions of both ends in the width direction coincide with a connecting direction of a permanent formwork for concrete construction, and elastic engaging pieces are provided at both ends in the width direction. A connection tool for permanent formwork for concrete construction. 3. One piece of a long board on the outer surface and the other piece on the inner surface thereof, each piece having an L-shaped cross section and having a width substantially equal to the thickness of a permanent formwork for concrete construction. A connecting fitting for a permanent formwork for concrete construction, characterized in that ribs are provided so as to protrude along the center line in the width direction, and elastic engaging pieces are provided at the tips of the ribs.