JPH029232B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a method for backfilling a gap between a pipe installed through a through-hole provided in a wall, floor, etc. and the through-hole.

Prior Art When various types of piping are installed through through-holes in the walls or floors of buildings, the ring-shaped penetrating portion between the inner peripheral surface of the through-hole and the outer peripheral surface of the pipe is usually filled with backfilling material. This prevents the spread of fire or smoke to adjacent rooms in the event of a fire. Conventionally, when carrying out such backfilling, calcium silicate is used, as shown in the vertical cross-sectional view and plan view in FIGS. Alternatively, the plate body 3 such as plywood is divided into two in the diameter direction of the hole 2, and the pipe 1 is sandwiched between the plate body 3 and the wall or floor 4.
etc., by nailing or jacking, and closing one opening 5a of the ring-shaped penetrating portion 5 between the inner circumferential surface of the through hole in the wall or floor 4 and the outer circumferential surface of the pipe 1. , a method was used in which cement mortar, gypsum slurry, etc. was injected through the other opening 5b and solidified.

In addition, instead of the plate-shaped backfilling jig A, as shown in FIGS. 6a and 6b, it is made of a flexible material with a circular light part 6 provided in the center that almost coincides with the outer circumference of the pipe 1. A backfilling jig B is provided, in which a separation part 8 is formed by cutting a thick annular body 7 at one place, and removable connecting members 9, such as magnets, are attached to opposing surfaces of this separation part. Proposed.

Problems with the Prior Art However, since cement mortar and the like tend to adhere to the jig A, it is difficult to remove it, and it is also difficult to use it repeatedly due to solid matter adhering to the removed jig. Furthermore, due to the requirement for flexibility, Jig B is made of soft materials such as foamed urethane, foamed polyolefin, soft resin, and rubber. In this case, it also had the disadvantage that it could not be used repeatedly because it easily adhered to the surface.

Object and structure of the present invention In view of the above-mentioned circumstances, the present invention prevents conventionally used backfilling jigs from shortening their lifespan due to adhesion of backfilling material, and can be used semi-permanently for repeated backfilling. The purpose of this method is to provide a backfilling method, and its gist is to provide an opening in a penetrating part between the outer circumferential surface of a pipe that is piped through a through-hole provided in a wall, floor, etc., and the inner circumferential surface of the through-hole. In a backfilling method in which a closing jig having a circular hole having the same diameter as the outer diameter of the pipe is brought into contact with the penetrating portion and a backfilling material is injected into the penetrating portion, at least the above-mentioned backfilling material of the closing jig is injected into the penetrating portion. This backfilling method involves laying in advance a synthetic resin film that does not have adhesive properties with the backfilling material in the area in contact with the backfilling material.

Specific structure and operation of the present invention FIGS. 1 to 3 are explanatory diagrams of a backfilling method according to the present invention, and FIG. 1 is a plan view of a film 11 used in this method. film 11
is an annular film having a circular hole 12 in the center that matches the outside diameter of the pipe, and this annular film is provided with a cutting portion 13 for cutting the annular portion. Further, the outer circumference of the film 1 is larger than the outer circumference of the ring-shaped penetrating portion 5.

Since the film has a cut part, it can be attached to and removed from the pipe 1, but the material used is one that is difficult to adhere to, such as mortar, and is usually made of polyolefin,
Vinyl chloride film, polyolefin laminate, aluminum foil, etc. are used.

When backfilling is performed, for example, using jig B, as shown in FIG. 9, 9 connect the separation part 8. Next, the cut portion 13 of the film 11 is opened and attached to the pipe 1, and the ring-shaped cavity 5 is opened.
The surface 14 of the jig that closes the area is coated. Next, as shown in FIG. 3, the jig B is pressed against one opening 5a (lower in FIG. 3) of the ring-shaped cavity 5,
The opening 5a is closed via the film 11, and mortar is injected through the opening 5b. After the mortar has solidified, the jig B is removed and the film 11 is removed.

In the above operation, since the surface 14 of the jig B closes the opening 5a through the film 11, the surface 14 of the jig B does not directly touch the mortar, and there is no mortar stain or adhesion of mortar solidified matter, and the jig B is semi-permanent. This allows for various uses. Further, the film 11 can be easily peeled off after the mortar has solidified, and the mortar does not adhere to the film 11, so that the finished surface of the solidified mortar is smooth.

Therefore, the jig B does not need to be cleaned even after repeated use or new use of the film, and efficient backfilling work can be performed.

FIGS. 4a and 4b show another example of the film used in the method of the present invention, in which two U-shaped films 11' are combined and a circular hole 12 is formed in the center. be. As described above, the film used in the present invention may be formed on the surface of the jig B as long as it has a shape and size that can form the circular hole 12 and sufficiently cover the cavity 5 by using one film or a combination of multiple films. be done.

Effects of the Present Invention As described above, according to the backfilling method of the present invention, the opening is closed by the conventional jig through the film, and the mortar surface is in contact with the smooth film surface, giving a good appearance. The finish and the jig itself will not be damaged and can be used semi-permanently. Furthermore, since the mortar does not come into contact with the jig,
It has the advantage that it does not require cleaning after each repeated use and enables efficient backfilling work.

[Brief explanation of drawings]

1 to 3 are explanatory diagrams of the backfilling method according to the present invention, FIG. 1 is a plan view showing an example of the film used in the present invention, and FIG. A perspective view of the surface of the jig to be closed covered with a film, FIG. 3 is a vertical cross-sectional view showing a state in which backfilling is being performed, and FIGS. 4 a and b show other examples of the film type. In the plan view, Figure 4a is U
FIG. 4b is a plan view of the letter-shaped film, FIG. 4b is a plan view of the films shown in FIG. 4a combined facing each other, and FIGS. Figure 5a is a longitudinal sectional view;
Figure b is a view taken along the line V-V in Figure 5a, Figure 6a,
Fig. 6b is a diagram showing a state in which backfilling is performed using another jig, Fig. 6a is a perspective view of the jig attached to the piping, and Fig. 6b is a diagram showing how the lower part of the cavity is filled with the jig. FIG. 3 is a longitudinal cross-sectional view showing a state in which the opening is closed. 1... Piping, 4... Floor or wall, etc., 5... Ring-shaped penetrating portion, 5a... One opening, 5b... Other opening, 6... Circular hole, 7... Annular body, 1
1...Annular film, 11'...U-shaped film,
12... Circular hole, 13... Cutting section, A... Jig, B
……jig.

Claims (1)

[Claims] 1. A circular hole with the same diameter as the outside diameter of the pipe is inserted in the center of one opening of the penetrating part between the outer peripheral surface of the pipe that is piped through a through-hole provided in a wall, floor, etc. and the inner peripheral surface of the through-hole. In a backfilling method in which a backfilling material is injected into the penetrating portion by abutting a closing jig having a material, at least a portion of the closing jig that comes into contact with the backfilling material is preliminarily filled with a synthetic resin that does not have adhesive properties with the backfilling material. A backfilling method characterized by laying a film.