JPS6141031Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a cap body used when attaching a sleeve for piping to a concrete slab.

(Conventional technology) Conventionally, the construction method for penetrating pipes into a concrete slab is to first install a sleeve on top of the slab formwork, fill the sleeve with cloth, etc., then pour concrete and allow the concrete to solidify. Thereafter, the stuffing is removed from the sleeve, the slab formwork is demolded, and a tube is passed through the sleeve. Thereafter, the lower end opening of the sleeve is closed with a formwork, mortar is filled into the sleeve to fill the gap between the sleeve and the tube, and after the mortar has solidified, the formwork is removed.

(Problems that the invention aims to solve) However, this method requires time and effort to pack and take out cloth, etc., and in particular, it is necessary to attach a formwork to close the opening at the bottom end of the sleeve when filling with mortar. It was troublesome and the work of installing the sleeve and constructing the piping inside the sleeve was inefficient.

An object of the present invention is to provide a sleeve cap that allows the installation of a sleeve and the construction of piping inside the sleeve efficiently and reliably.

(Means for Solving the Problems) The present invention includes a cap body 1 that can close the openings at both ends of the sleeve S, and a mounting portion 2 that is detachable from the sleeve is provided on the outer periphery of the cap body. A detachable punching plate 4 having approximately the same diameter as the outside diameter of the pipe is provided in the center of the cap body.

(Function) The sleeve cap closes the upper end opening of the sleeve S when pouring a concrete slab, and prevents concrete from entering the sleeve. Also, when filling mortar between the sleeve and the pipe P, a sleeve cap is used to close the opening at the upper end of the sleeve S. 4, then remove cap body 1.
Use piping to close the opening at the bottom end of the sleeve,
Retains mortar within the sleeve.

(Example) An example of the present invention will be described below based on the drawings. In Figs. 1 to 3, a cap body 1 is made of a plastic material, and on its outer periphery, four mounting pieces 2 are provided at equal intervals as mounting portions.
...are bent downwards as one. The mounting pieces are slightly expanded outward to give elasticity, and the lower end of each mounting piece is provided with an engaging protrusion 2a that protrudes outward, and this engaging protrusion is shown in FIGS. 4 and 5. It can be attached to and detached from the rib Sa of the sleeve S. Note that the attachment portion may be formed all around the outer circumference of the cap body 1.

In the center of the cap body 1, there is a slit 3, which forms an annular shape with approximately the same diameter as the outer diameter of the pipe P (Fig. 6).
3a is cut out, and the inside of this slit serves as a punched plate 4. A portion of the punching plate 4 (two pieces facing each other in the drawing) are connected to the cap body 1 at connecting portions 5, 5, and this punching plate can be separated from the connecting portion and removed from the cap body. Further, a bellows part 6 is formed on the cap body 1 outside the slits 3 and 3a concentrically with the punched plate 4, and the cap body 1 can be expanded and contracted in the radial direction by this bellows part. Instead of the slits 3 and 3a, the punched plate may be separated by half punching.

Next, using the sleeve cap of the present invention, installation of the sleeve and piping construction inside the sleeve will be explained. First, as shown in FIG. 4, the sleeve S is installed at a predetermined position on the slab formwork K, and the upper end opening of this sleeve and the sleeve cap body 1 are closed. That is, the cap body 1 engages with the upper rib Sa of the sleeve S by contracting the mounting piece 2 inward, thereby closing the upper end opening of the sleeve with the cap body, as shown in FIG. Can be done. After that, concrete C is placed on the slab formwork K, and after the concrete slab has solidified,
Remove the cap from sleeve S and slab formwork K
Remove the mold. Then, the punching board 4 is separated from the cap body 1. Thereafter, the pipe P is passed through the sleeve S, and the cap body, in which the punching plate 4 is cut off from the cap body 1 and the hole 1a (FIG. 6) is made, is attached downwardly to the attachment piece 2a as shown by the chain line in FIG. is directed upward, insert this hole from above the pipe P, and push it deeply into the sleeve S from the upper end opening to engage the engagement protrusion 2a of the attachment piece with the lower rib Sb of the sleeve S. . As a result, the lower end opening of the sleeve S is closed by the cap body 1. After that, the sleeve S is filled with mortar M, and the pipe P
Fill in the gaps and finish the work.

The mounting portion of the cap body 1 is not limited to the one shown in the drawings, but may be, for example, a cylindrical body with grooves formed at appropriate locations. Further, the engaging portion does not necessarily have to be an engaging protrusion; for example, if the rib of the sleeve S is a convex portion on the inside, it may be a concave portion and be engaged with the convex portion.

In the present invention, since the bellows part 6 of the cap body 1 is provided, if the centers of the pipe P and the sleeve S are misaligned, when closing the lower end opening of the sleeve S with the cap body 1, it is necessary to As shown, the above-mentioned positional deviation can be accommodated by contracting the bellows part 6 in the narrow part of the gap and extending the bellows part 6 in the part with the wide gap.

Further, by expanding the attachment pieces outward, the attachment to the sleeve S can be strengthened, so that it is possible to prevent the cap body 1 from falling off.

(Effects of the invention) As explained above, according to the invention, the upper end opening of the sleeve is blocked when concrete slab is poured, and the lower end opening of the sleeve is prevented from being blocked when mortar is filled into the gap between the sleeve and the pipe. A single sleeve cap can be used for both purposes, making it possible to install the sleeve and install piping inside the sleeve efficiently and reliably.

[Brief explanation of the drawing]

Fig. 1 is a front view of a sleeve cap showing an embodiment of the present invention, Fig. 2 is a plan view, Fig. 3 is a sectional view taken along the line shown in Fig. 2, and Figs. Fig. 7 is a step-by-step process diagram showing the construction of the pipe, and Fig. 7 is a view from below of the sleeve cap being attached with the sleeve and the pipe being misaligned. 1...Cap body, 2...Mounting piece, 2a...
Engaging protrusion, 3, 3a...slit, 4... punched plate, 5... connecting part, 6... bellows part, S... sleeve, C... concrete, M... mortar.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A cap body capable of closing openings at both ends of the sleeve; a mounting portion bent on the outer periphery of the cap body and removable from the sleeve; and a detachable portion at the center of the cap body. A sleeve cap that is equipped with a punched plate that has approximately the same diameter as the outside diameter of the pipe. (2) A sleeve cap according to claim 1 of the utility model registration claim, characterized in that a bellows part that can be expanded and contracted concentrically with the punched plate is provided on the outer periphery of the punched plate of the cap body. (3) The sleeve cap as set forth in claim 1 of the utility model registration, characterized in that the attachment portion is an elastic attachment piece that expands outward.