JPH0124467Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an end cover for protecting the tip of a pipe to be buried in a concrete ceiling from being buried during concrete pouring.

In a double ceiling with a ceiling plate installed below the concrete ceiling, in order to pull out the pipes buried in the concrete ceiling downward from the concrete ceiling, protect the ends of the pipes from being buried in the concrete during concrete pouring. An end cover is required.

The end cover conventionally used for piping of metal conduits is the one shown in Fig. 1, which is press-formed from a thin metal plate, and has a dome-shaped main body 1.
The bottom part 2 and rear end part 3 of are formed as openings,
A flange-shaped mounting seat 4 is integrally formed on the bottom peripheral edge. When using this end cover, as shown in Fig. 2, it is fixed to a temporary frame 5 for concrete pouring with nails 6 driven through the nail holes 4a, 4a, ... of the mounting seat 4, and the rear end Concrete pouring is performed with the flexible pipe 7 inserted through the opening 3. If the temporary frame 5 is removed after the concrete layer 10 has hardened, the tip 7a of the flexible tube 7 can be taken out downward.

However, with the conventional end cover mentioned above,
Since the flexible pipe 7 is not fixed until the concrete hardens, the flexible pipe 7 may be damaged due to worker's carelessness, etc.
If a backward force is applied to the tip, it will be easily moved backward, and the tip will not be able to be taken out enough.
There was a strong possibility that it would be difficult to connect to other tubes, or that only the distal end would be forcibly bent during connection, leading to breakage at the bent portion c.

This invention improves the drawbacks of the conventional end covers and provides an end cover that can firmly hold the distal end of a flexible tube once inserted so that it will not be pulled out backwards. , a box-shaped main body having an opening for taking out a flexible tube at the bottom and capable of accommodating the end of the flexible tube over a predetermined length substantially parallel to the opening surface formed by the opening; , and a flexible tube that is inclined so that the rear side is higher than one end of the main body, and that a tube section that continues to the end of the flexible tube that is housed in the main body is inserted almost concentrically. It is characterized by being equipped with a tube insertion tube.

Hereinafter, an explanation will be given based on the drawings showing the embodiments. As shown in each figure from FIG. A wall plate 11 is provided at the rear end portion 3, and a cylindrical insertion tube 1 is installed in this portion.
2 are provided integrally. The insertion tube 12 has an inner diameter slightly larger than the outer diameter of the flexible tube 7 to be inserted, and both ends thereof are formed as openings. The bottom 2 of the main body 1 is formed as an opening through which the flexible tube 7 freely passes up and down, and the bottom periphery is provided with nail holes 13.
Ear-shaped mounting pieces 13, 13, . . . are provided with holes a. The rear part of the main body 1 is raised obliquely upward to form an introduction part 1a whose upper surface part is inclined rearwardly, and the wall plate 11 forming the rear end surface is formed as a forwardly inclined inclined surface. Further, the cylindrical insertion tube 12 is also inclined at an angle substantially equal to the angle of inclination of the upper surface of the introduction portion 1a so that the rear side is higher. The inclination angle of this insertion tube 12 is preferably about 15 degrees with respect to the horizontal plane (bottom surface).

This end cover is used in the state shown in FIG. That is, the end cover A placed on the upper surface of the temporary frame 5 is inserted into the nail hole 13a of the mounting piece 13.
is fixed to the temporary frame 5 with nails 6 passed through the tube, and the flexible tube 7 is inserted through the opening 12a of the insertion tube 12. flexible tube 7
It is advantageous to insert it all the way until its front end comes into contact with the front end wall 1b of the main body 1, since the length to be taken out becomes longer. Next, by pouring concrete from above and removing the temporary frame 5 after the concrete layer 10 has hardened, the tip 7a of the flexible tube 7 can be freely taken out downward as shown in FIG. Thus, desired connections can be made as shown in FIGS. 7 and 8. In the figure,
15 is a ceiling panel, 16 is a hanging bolt, 17 is a bushing, 19 is a VV cable, 20 is a coupling, 21 is a box connector, 22 is a box containing connection terminals and other parts, and 23 is a lighting fixture.

This end cover has an insertion tube 12 that is inclined so that the opening opening to the outside is higher, and the flexible tube 7 is inserted into the main body 1 through this insertion tube 12, so that after insertion, the upper surface of the temporary frame 5 and The flexible tube 7 is bent into a substantially S-shape by the insertion tube 12. For this reason, a pressing force is applied to the flexible tube 7 against the upper surface of the temporary frame and the inner surface of the insertion tube, increasing frictional resistance and making it difficult for the flexible tube 7 to come out backward. Therefore, the flexible tube 7 can be firmly held until the concrete layer is sufficiently hardened. This end cover can be made of a metal plate or an opaque synthetic resin material, but if it is made of a transparent or semi-transparent material as in the above example, the flexible tube can be inserted deeply enough. This is advantageous because it can be visually confirmed whether the

As explained above, the end cover according to this invention has a relatively simple structure, but is excellent in that the inserted flexible tube is firmly held and there is little risk of it being pulled out backwards.

[Brief explanation of the drawing]

FIG. 1 is an external view of a conventional end cover, and FIG. 2 is an explanatory view of its usage. Fig. 3 is an external view showing an example of the end cover according to this invention, Fig. 4 is a perspective view of its main parts, and Figs.
The figure is a sectional view showing the state of use. 1... Main body, 2... Bottom, 3... Rear end, 5...
... Temporary frame, 6 ... Nail, 7 ... Flexible tube, 10 ... Concrete layer, 11 ... Wall board, 12 ... Insertion tube, 1
3...Mounting piece, 15...Ceiling panel.

Claims (1)

[Scope of utility model registration request] a box-shaped main body having an opening for taking out the flexible tube at the bottom and capable of accommodating the end of the flexible tube over a predetermined length substantially parallel to the opening surface formed by the opening; and a flexible tube that is inclined so that the rear side is higher than one end of the main body, and that the tube section that follows the end of the flexible tube housed in the main body is inserted almost concentrically. An end cover for a flexible tube characterized by being equipped with an insertion tube.