JPS644278Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a pipe end protection cap, which is mainly used in electrical installation work to support electrical conduits by burying them while standing up on concrete slabs in order to communicate with wiring boxes for cable branching, etc. In addition to reliably preventing the intrusion of toro when supporting buried temporary fixings, it is also possible to attach to any of the two types of standardized electrical conduits, usually of different sizes, large and small, and in particular, By combining it with a stance maintenance rod, it is possible to maintain the upright position of flexible electrical conduits, and the pipe end protection can also be used not only for this type of electrical conduits but also for closing the end openings of various types of pipe materials. It's about caps.

Traditionally, when performing various types of wiring on slab concrete during concrete building construction work,
Electric conduit pipes are temporarily supported in a rising shape on the slab concrete, and concrete material is poured and buried and fixed. However, since the conduit in the upright state is open, it is necessary to properly close it, and since conduit is usually standardized in two types, large and small, different diameters, it is necessary to separately classify them. If it cannot be used, it is inconvenient to handle. On the other hand, when supporting conduit pipes to be buried in an upright manner, there is no problem with supporting them as long as they are made of rigid steel pipes; In the case of flexible synthetic resin pipes and spiral band metal pipes, it is difficult to maintain an upright support state due to their flexibility. Therefore, if a support means is used to support it from the outside, the support means will get in the way after the embedding is completed, and in some cases, it will require extremely troublesome work such as backfilling after removal. It was hot.

Therefore, this idea was devised in view of the points mentioned above, and its gist is that a large-diameter cylindrical part that fits around the outer periphery of the end of a large-diameter pipe that rises up on slab concrete and is exposed, and a small-diameter The small-diameter cylinder part that fits inside the inner periphery of the end of the pipe material is connected via a donut-shaped top wall to form an integral double cylinder shape with an inner and outer layer, and a breakable bottom wall is provided at the lower end of the small-diameter cylinder. This is due to the fact that it was established.

Hereinafter, embodiments of this invention will be described with reference to the drawings.

Reference numeral 1 shown in the figure is a large diameter cylinder part,
It has an inner diameter that fits around the outer periphery of the end of the large-diameter pipe P1 that rises up and is exposed on a slab concrete C such as a floor slab. The pipe material P1 is expected to be, for example, a metal pipe called a conduit for electrical wiring, especially one made of flexible synthetic resin or a spiral band.
It has an outer diameter of 25mm.

2 is a small-diameter cylindrical part, and a small-diameter pipe P that rises up and is exposed on the slab concrete C in the same way.
It has an inner diameter that fits inside the inner periphery of the two ends, and the pipe material P2 is usually
It has an outer diameter of 19mm.

The large-diameter cylindrical portion 1 and the small-diameter cylindrical portion 2 are integrally formed by connecting the donut-shaped top wall 3 between the upper ends of both 1 and 2 so as to form a double inner and outer cylindrical shape. The overall cross section has a shape similar to a concave shape, and is made of, for example, polypropylene resin. The double cylindrical arrangement of the large diameter cylindrical portion 1 and the small diameter cylindrical portion 2 is not limited to the concentric circular shape as shown in the figure.
In some cases, it may be located at an eccentric position so that it can smoothly accommodate the knock-out position where a hole is opened in the side wall of a wiring box B such as an outlet box.

The opening at the lower end of the small-diameter cylindrical portion 2 is closed by providing a breakable bottom wall 4, and in the illustration, a part of the bottom wall 4 is made into a thin film shape so that it can be closed by applying a forced external force. It is made so that it can be broken through (Second
(see Figure, Figure 3).

In addition, T is a stance maintaining rod that is inserted into the flexible tubes P1 and P2 in order to maintain the standing state of the tubes P1 and P2.
used in combination with As shown in the figure, this stance maintaining rod T is made by folding a wire rod of an appropriate diameter in two and inserting the two-folded part into the pipes P1 and P2, so that the horizontal and rising parts of the pipes P1 and P2 are fixed. The plastic deformation part 11 is made to be able to be plastically deformed in accordance with the bending state, and the free end part is a horizontal part 12 that connects to the cap S. It is bent into an L shape.

In order to connect the standing leg maintaining rod T to the cap S, a fitting groove 5 into which the horizontal portion 12 of the standing leg maintaining rod T is fitted and supported is provided in the top wall 3. The fitting groove 5 is connected to the top wall 3
At the inner edge of the top wall 3, the bent part of the stance maintaining rod T is communicated with the inner side of the small diameter cylindrical part 2, and at the outer edge of the top wall 3, the bent part of the horizontal part 12 is communicated with the outer side of the large diameter cylindrical part 1. In addition to making the opening part smaller than the width of the deep part of the fitting groove 5, the cross-section has a substantially dovetail groove shape, and the horizontal part 12 is forced to fit in and out. To ensure stability of the fitted and supported state.

6 is a connecting recess formed in the top wall 3;
The leg part 21 of the U-shaped connecting rod J that connects the plurality of pipe materials P1 and P2 when they are installed adjacent to each other is inserted. As shown in FIG. 5, the connecting rod J is obtained by bending a wire rod of an appropriate diameter into a U-shape, and has an inner diameter into which the leg portion 21 is forcibly inserted. A connecting recess 6 is formed by recessing the upper surface of the wall 3 in the shape of a hole, and the bottom thereof is closed. By placing this connecting rod J across the caps S attached to the open ends of the adjacent pipes P1 and P2, it is possible not only to maintain a constant distance between them, but also to maintain the temporary rise of each pipe. It becomes easy to set the stop, and communication with wiring box B, which will be carried out at a later date, can be carried out smoothly (see Fig. 6).

Next, this describes the use of pipe material P piped according to a limited design during slab construction.
1. If the end of P2 is a small diameter pipe P2, raise it up corresponding to the position of the wiring box B that connects it, and cover the end opening.
If the pipe material P1 has a large diameter, it can be attached by fitting the pipe material P1 internally (see FIG. 2), or by fitting it externally with the large diameter cylindrical portion 1 (see FIG. 3). At this time,
If each of the pipe materials P1 and P2 is flexible, the small diameter cylindrical part 2
Pipe member P1,
It may be inserted into P2.

Therefore, since the end openings of the pipes P1 and P2 can be completely closed, it is possible to reliably prevent concrete from entering into the pipes P1 and P2, and for example, even if various cables are to be inserted therein, it will not get in the way. This makes it possible to proceed with electrical installation work smoothly. Moreover, by fitting the large-diameter cylindrical portion 1 onto the outer periphery of the large-diameter tube P1, the small-diameter cylindrical portion 2
2, the ends of the tube materials P1 and P2 can be closed separately, and the large diameter tube section 1 and the small diameter tube section 2 are connected via the donut-shaped top wall 3 and are integrally formed. , can be used according to the diameters of the pipe materials P1 and P2, is highly versatile, does not require separate manufacture and preparation for different diameters, and is easy to handle on site.

The bottom wall 4 provided at the lower end of the small diameter cylindrical portion 2 together with the top wall 3 reliably closes the openings of the pipe materials P1 and P2, and in this way closes the lower end of the small diameter cylindrical portion 2 to open the large diameter cylindrical portion 1. Forming a protrusion inside has the advantage that even if it is hidden by the large-diameter cylindrical portion 1, it can be easily detected when it is attached to the small-diameter tube P2. Furthermore, since the bottom wall 4 itself is breakable, it is also possible to insert and support the stance support rod T for raising the tube members P1 and P2 themselves.

Not only that, it is sufficient to forcibly attach the pipes P1 and P2 by fitting them into the openings, which ensures prompt work on site.
After the concrete material solidifies, it can be removed and reused, so there is no waste (see Figure 4).

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
The figure is a perspective view, Figure 2 is a partially cutaway side view of the case when installed in a small-diameter pipe opening that maintains the standing position using a stance support rod, and Figure 3 is a side view with a partial cutout when installed in a large-diameter pipe opening. Fig. 4 is a perspective view when removed, Fig. 5 is a perspective view when a large number of pipes are installed adjacently by connecting rods, and Fig. 6 is a state in which the pipes are connected to the wiring box. It is a partially omitted front view. B...Wiring box, C...Slab concrete, J...Connecting rod, P1, P2...Pipe material, S...
Cap, T...Standing leg maintenance rod, 1...Large diameter cylindrical part,
2...Small diameter cylinder part, 3...Top wall, 4...Bottom wall, 5...
... Fitting groove, 6 ... Connection recess, 11 ... Plastic deformation part, 12 ... Horizontal part, 21 ... Leg part.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A large-diameter cylindrical portion that fits externally on the outer periphery of the end of a large-diameter pipe rising up and exposed on a concrete slab, and a small-diameter cylindrical portion that fits internally on the inner periphery of the end of a small-diameter pipe that is raised and exposed on a concrete slab. 1. A tube end protection cap, which is integrally formed so as to have a double inner and outer tube shape by being connected through a top wall, and has a breakable bottom wall at the lower end of the small diameter tube. 2. A utility model in which a fitting groove is recessed in the top wall into which the horizontal part of the upright support rod, which is bent into a substantially inverted L shape and is inserted into the pipe to maintain the standing state of the pipe, is fitted and supported. A tube end protection cap according to claim 1. 3 Utility model registration claims 1 or 2 in which a connecting recess is formed in the top wall into which the leg of a U-shaped connecting rod that connects a plurality of pipes installed adjacent to each other is inserted. tube end protection cap.