JPS6316774Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] This invention relates to pipe supports for concrete formwork, and is used in building, factory, and other concrete construction work to install electrical conduits, water pipes, etc. inside concrete structures such as beams and walls. When burying pipes such as pipes, gas pipes, etc., it can be easily and quickly secured and temporarily secured during construction of concrete formwork, and can be easily removed after demolding the formwork, and can be reused. The invention relates to pipe supports.

[Technical background of the invention and its problems]

Conventionally, in concrete construction work, in order to bury various types of pipes within a concrete frame, they are temporarily secured between concrete formworks and then concrete is poured. It must be strong enough to prevent positional displacement even when subjected to shocks and vibrations during installation.
Therefore, various supporting means that have been proposed in the past have been considered in order to satisfy such requirements, but none of them have been satisfactory for various reasons.

That is, in the pipe fixing (insertion) type according to Japanese Utility Model Publication No. 53-7553, a cavity is created in the pipe support material itself after the mold is removed, so the backfilling operation must be performed again. Similarly, with the void fixing method, in which a paper tube (void tube) is fixed using a support material with flanges, the void tube needs to be removed and backfilled, and furthermore, when setting the void tube, it is necessary to remove the void tube. There is a drawback that the flange of the supporting material cannot be enlarged. In the conventional void pipe nailing method shown in Japanese Utility Model Application Publication No. 56-39558, the void pipe needs to be removed and backfilled, leaving the nails behind, and adjustment of the cut dimension error of the void pipe is required. The problem is that it is difficult to In the case of the pipe solid (covering) type according to Japanese Utility Model Application Publication No. 56-39558, which uses metal fittings to secure pipes in an externally fitted manner, it is difficult to remove the fittings, and insulating work at the ends of the pipes is troublesome. be. In addition, in the pipe passing method, in which pipes with end covers exposed on the ceiling surface connected at both ends are installed across the beam and wall structure,
Not only is it troublesome to bend the pipes to avoid the upper reinforcing bars in the frame, but the size of the pipes is also limited. Sleeve holders, which are made up of multiple concentric rings connected by radial reinforcing rods, are set on both ends of the pipes and fixed to the formwork surface, and the lids that close the open ends of the pipes are bolted. In the Weblen method,
Although it is suitable for large-diameter pipes, the device itself becomes large-scale for small-diameter pipes. In the pipe insertion type disclosed in Japanese Utility Model Publication No. 54-3746, temporary fixation is not possible and it is difficult to adjust the cutting dimensions of the pipe. With the hat-shaped sleeve type, in which the bottom flange of a roughly truncated cone-shaped hat sleeve is nailed to one of the formworks in close contact between the formworks, the width of the frame is limited and compatibility is poor, and it is fixed on one side. This makes it unstable.

[Purpose of invention]

Therefore, this idea was devised in view of the various drawbacks of the conventional methods mentioned above, and the various pipes that are buried when constructing concrete structures such as beams, walls, floors, etc. are placed opposite each other in the structure frame. It is firmly fixed between a pair of concrete formworks, and the spacing can be adjusted, making it highly adaptable to installation.In addition to being able to choose how it is attached to the formwork, it is also easy to remove and remove when demolishing the formwork. The aim is to make it easy to do.

[Summary of the idea]

In order to achieve the above-mentioned purpose, this invention has a support body that fits inside the pipes buried in the concrete frame, and a contact flange that is fixed in contact with the concrete formwork surface by nailing means. At the same time, a nut into which a fixing bolt that is inserted and screwed into the formwork is screwed is attached to the support main body, and the support main body is connected to the formwork by making it possible to communicate with the screw hole of this nut. This consists in that a breakable thin film portion is formed at the end, and the supporting body and the abutting flange are integrally formed of rubber or a flexible material similar to rubber.

[Example of idea]

An embodiment of this invention will be described below with reference to the drawings.

The reference numeral 1 shown in the figure is a substantially cylindrical supporting body, which is fitted into the open end of pipes P such as electrical conduits, water pipes, and gas pipes buried in walls, beams, floors, and other concrete structures C. As shown, its outer diameter corresponds to the inner diameter of the pipes P.

A contact flange 2 is connected to the front end of the support main body 1 and is fixed to the inner surface of the concrete formwork W by nailing means, and both the support main body 1 and the contact flange 2 are It is integrally formed from a flexible material similar to rubber or pipe. The nailing means is
It consists of an appropriate number of nail holes 3 drilled in the abutment flange 2 and nails 4 inserted into the nail holes 3, and usually three or four nail holes 3 are formed.

On the other hand, a nut 5 is attached to the support body 1, and a fixing bolt 6 is screwed into the support body 1, and is inserted into the formwork W and screwed onto the outer surface of the formwork W with a fixing nut N. Nut 5 is supporter 1
The nut 5 is fitted into the front end of the abutting flange 2 at approximately the center thereof, and the nut 5 itself is firmly attached without being rotated idly. In the illustrated example, the rear end of the support main body 1 is recessed into a flap shape to form a guide part 7, and a hexagonal recess 8 is continuously formed in the inner part of this guide part 7. A nut 5 is fitted into the position 8. By doing this, when the rear end is known and the fixing bolt 6 is screwed into the nut 5, guidance is provided by the inner surface of the guide part 7, improving workability and making the opening end of the guide part 7 thin-walled. This increases the inward flexibility, and as will be described later, the pipes P or connecting pipe 10 when demolding the formwork W.
This has the advantage that the fitted state can be quickly released.

Further, the bottom wall portion of the recess 7 at the end of the support body 1 that contacts the formwork W, that is, the front end of the support body 1, is formed as a broken thin film portion 9 so as to be able to communicate with the screw hole of the nut 5. By forcibly breaking through this broken thin film portion 9 with a knife or the like, a penetrating portion for the fixing bolt 6 communicating with the screw hole can be obtained.

In the illustration, the support main body 1 is a threaded connecting pipe 1 that is externally connected to the pipes P by being screwed into male threads P1 formed at both ends of the pipes P.
0. That is, a female thread 11 is formed on the inner periphery of the connecting pipe 10,
The overall length can be adjusted by changing the screwing length with the pipes P, and it is possible to cope with and adjust the case where the thickness of the frame C is different. In particular, as shown in FIG. 3, by shortening the threaded length of the connecting pipe 10 to the pipes P and making the whole small, the connecting pipe 10 can be quickly placed in a predetermined position relative to the formwork W. By extending the contact flange 2 and pressing the contact flange 2 against the inner surface of the formwork W (see FIG. 2), temporary fixation until nailing or bolting is possible. Furthermore, as shown in FIG. 5, screw connection with other pipes P2 after demolding of the formwork W can be obtained by the connecting pipe 10, and communication with the pipes P can also be smoothly performed. I can do it.

This device is constructed as described above, and when used, the supporting body 1 is fitted into both ends of the pipes P to be buried, with or without the connecting pipe 10, to connect the pipes P. In this state, the contact flange 2 is inserted into the gap between the formworks W and brought into contact with the inner surface of the formwork W, and as shown in FIG. ) or with bolt fastening means 6, 5, N (see right side of the figure)
The pipes P may be mounted and fixed to the supporting bodies 1 which are respectively fixed in contact with the formwork W, with or without the connecting pipes 10 interposed therebetween. After that, the concrete material is poured, and once it has solidified after a predetermined curing period, the formwork W can be removed from the mold.
0, it can be used again by simply removing it by pinching the abutting flange 2 and bending it (see Fig. 4).

[Effect of idea]

Therefore, the pipes P to be buried in walls, beams, and other concrete structures C are fitted into the openings at both ends of the pipes P, and are fixed in contact with the inner surface of the formwork W, thereby preventing the poured concrete. After the material has solidified, the pipes P can be used as electric conduit pipes, water pipes, and gas pipes according to the intended purpose, and when forming the formwork W, they can be used without being obstructed by reinforcement reinforcement or other structures. In addition to being able to temporarily install pipes P without having to
Since both ends of the pipes P are fixed to the formwork W, vibration of the concrete material being poured,
It has strong temporary fixing stability that does not cause positional shift even under impact.

Since the supporting body 1 is fitted into the pipes P,
The concrete material to be placed will be attached to the entire length of the pipes P, and since the pipes P themselves will remain as they are and be used for the specified purpose, it will be difficult for this 1 to be removed. There is no need for backfilling even if the material is removed, and it is easy to handle.

Fixing to the formwork W is achieved by connecting the abutting flange 2 to the supporting body 1, which is abutted against the surface of the formwork W by nailing means 3 and 4, and penetrating into the formwork W. Nut 5 into which fixing bolt 6 is screwed
is attached to the support body 1, and is made to communicate with the screw hole of the nut 5, and a breakable thin film portion 9 is formed at the end of the support body 1 that contacts the formwork W.
As shown in the figure, it can be carried out in either manner, allowing for selection. In some cases, the formworks W may be pressed together using the connecting pipes 10 and placed on the reinforcing bars (not shown), allowing for various installation methods. This is particularly suitable in cases where nailing to the formwork W or opening is difficult.

In addition, the abutment flange 2 is in contact with the formwork W, and on the other hand, when it is bolted, it is broken and opened, so that it can communicate with the screw hole of the nut 5. A broken thin film portion 9 is formed from the end of the support body 1 at the joint, the support body 1,
Since the abutting flange 2 is integrally formed of rubber or a flexible material similar to rubber, when it is fixed to the formwork W, no matter how it is attached, it cannot enter the inside of the pipes P. Concrete material that has been placed will not enter the pipes at a later date.
There will be no hindrance to its use.

The integral formation of the supporting body 1 and the abutment flange 2 from a flexible material makes handling easy, for example, when fitting into pipes P, press-fitting to formwork W, and even when demolding formwork W. Both can be easily removed.

Furthermore, since the formwork W is removed when demolding, it can be reused any number of times, and since the mounting mode can be selected, it can be used in a variety of locations without any disadvantages, and it can be provided with a simple configuration and low cost. This has practical beneficial effects such as.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
Fig. 1 is a partially cutaway exploded perspective view, and Fig. 2 is a sectional view of the device in use.The left side is fixed by nailing means, and the right side is fixed by bolting means. Fig. 3 is a partially cutaway side view of the concrete formwork placed between them, Fig. 4 is a sectional view of the main part explaining the removal work when demolding the formwork, and Fig. 5 is a side view of the concrete formwork placed between each other. FIG. 3 is a cross-sectional view of main parts in a state where pipes are connected. C...Concrete frame, N...Fixing nut,
P...Pipes, P1...Male thread, P2...Other pipes, W...Concrete formwork, 1...Supporting body, 2...Abutment flange, 3...Nail hole, 4...
Nail, 5... Nut, 6... Fixing bolt, 7...
Guide part, 8... recess, 9... broken thin film part, 10...
...Connecting pipe, 11...Female thread.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. An abutting flange that is fixed to the surface of the concrete formwork by nailing means is connected to a support body that fits inside the pipes buried in the concrete frame. At the same time, a nut into which a fixing bolt that is inserted and screwed into the formwork is screwed is attached to the support body, and the nut is made to communicate with the threaded hole of the nut so that it breaks at the end of the support body where it comes into contact with the formwork. A support for pipes for concrete formwork, characterized in that a thin film part is formed, and a supporting body and an abutting flange are integrally formed of rubber or a flexible material similar to rubber. 2 Utility model registration claim Paragraph 1, in which the supporting body is fitted into a threaded connecting pipe that is externally connected to the pipes by being screwed into male threads formed at both ends of the pipes. Pipes and supports for concrete formwork as described.