JPH0131828Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field) The present invention relates to a backfilling tool for penetrating a structure such as a slab, a wall, a beam, etc. when piping is installed through the structure.

(Prior Art) Supply/distribution pipes and various other types of piping for structures are installed through structures such as slabs, walls, beams, etc., and the penetrating portions are often backfilled after installation. Generally, backfilling refers to inserting a pipe into a relatively large-diameter through-hole formed in advance in a structure, and then filling the gap between the pipe and the through-hole. For the above-mentioned filling, noncombustible materials such as cement mortar, rock wool, and glass wool are mainly used for the purpose of preventing flames from being transmitted through the gap between the pipe and the through hole in the event of a fire.

To explain conventional backfilling with reference to Figs. 1 and 2, through holes 2' are formed in advance in a slab 1' made of concrete etc. using a mold etc. when pouring concrete. (1st
figure). The diameter of the through hole 2' is usually made considerably larger than the diameter of the pipe 3' in consideration of the centering of the pipe 3' to be installed. After installing the pipe 3' in the through hole 2', attach a splint 4' to the bottom of the slab 1' surrounding the pipe 3' using nails, etc. to close the gap between the pipe 3' and the through hole 2'. A filling material 5' such as mortar or rock wool is filled in.

Figure 2 shows the backfilling of walls and beams 6'. in this case,
The splints 4' must be attached to both the inner and outer sides of the wall and beam 6'.

Splints prevent the filling material from escaping and facilitate construction, but since the installation of such splints (and sometimes their removal after construction is complete) and the filling work are all done on site, they require on-site work. Not only is this process extremely complicated, but it also has the disadvantage of degrading the aesthetic appearance of the slab and wall after the splint is removed.

Recently, backfilling tools have been used to save labor in the above-mentioned backfilling site work.

In Fig. 3, which shows an example of slab construction, when concrete is poured, a sleeve 7' made of metal, plastic, cardboard, etc. is supported by a support (not shown), and a concrete panel 8' is supported using nails, etc. Install and pour concrete on top. Since the standard thickness of the slab is usually 120 mm or 150 mm, the height of the sleeve 7' is made to be approximately the same. Since the inner diameter of the sleeve is quite large for the purpose of centering the pipe 3', it is filled with a filler material 5' such as mortar, rock wool, glass wool, etc. after the pipe 3' is installed. Note that the concrete panel 8' is removed after the concrete hardens. In this case, the above-mentioned through hole is constituted by the inner diameter of the sleeve.

Although the above-described backfilling using a sleeve requires somewhat less field work than the backfilling of FIGS. 1 and 2, the gap between the pipe and the through-hole must still be filled on-site. Particularly in Japan, which is an earthquake-prone country, it is necessary to have piping safely follow the behavior of structures in the event of an earthquake to prevent damage. In other words, the floor height must be 2.6 m, the inter-story displacement must be set to 1/150 to accommodate the safety factor, and the horizontal movement distance between the floors must be 17 mm, but backfilling with mortar will cause pipe damage due to vibration.

(Purpose of the invention) This invention was proposed to eliminate the above-mentioned drawbacks, and its purpose is to eliminate the need for backfilling with fillers such as mortar, rock wool, glass wool, etc. at the site, and to prevent earthquakes. It is an object of the present invention to provide a backfilling tool for a pipe penetrating portion that can sufficiently absorb interlayer displacement caused by the above-mentioned pipes, and that does not leave noticeable backfill marks.

(Structure of the invention) The above object is a backfilling tool for sealingly arranging piping through a deformable filler in a through hole provided in a building structure, the backfilling tool being ,
An outer cylinder that is installed inside the structure to form a through hole and has a height that is almost the same as the thickness of the structure; and an outer cylinder that is loosely fitted into the outer cylinder and surrounds the piping with a small gap; An inner cylinder having almost the same height as the thickness of the structure, a compression-deformable filling filled between the outer cylinder and the inner cylinder, and one end of each of the outer cylinder and the inner cylinder are connected to each other. This is achieved by a tool for backfilling a pipe penetration, which is provided with a connecting annular end plate, the end plate having concentric pleats so that it can expand and contract.

(Example) As shown in FIGS. 4 to 6, the backfilling tool of the present invention includes a cylindrical outer cylinder 1, an inner cylinder 2 loosely fitted into the outer cylinder,
The factory includes an annular end plate 3 that interconnects one end of each of the outer cylinder and the inner cylinder, and a compressively deformable filler 4 filled in the space between the outer cylinder, the inner cylinder, and the end plate. Manufactured and assembled within the company.

The outer cylinder 1 has a height approximately equal to the thickness of a structure 5 such as a concrete floor slab, which will be described later, and is provided with a plurality of mounting brackets 7 having nail holes 6 at its longitudinal edges.

The inner tube 2 has an inner diameter slightly larger than the outer diameter of the piping 8 to be installed, and has a height almost equal to that of the outer tube 1.

The end plate 3 is made of a non-combustible material, for example, a metal material,
It has folds concentric with the inner and outer cylinders, and is formed, for example, in a corrugated cross-section. When one end of the inner and outer tubes of such an end plate 3 is connected, even if there is some misalignment between the backfilling tool and the pipe 8, the inner tube 2 will move slightly on the horizontal plane to correct the misalignment. I can do it.

The filler 4 is a noncombustible material such as rock wool, glass wool, asbestos, perlite, and burquemulite, which can expand during compression filling, that is, has elasticity. Reference numeral 9 is an asbestos sheet that prevents the back surface temperature (the back surface temperature at the time of a fire outbreak) from reaching a dangerous temperature due to heat transfer due to heating between the inner and outer cylinders in the event of a fire outbreak, and also serves as an enclosure when filling the filler material 4. do. Note that the height of the outer cylinder 1 and the inner cylinder 2 when the asbestos sheet 9 is not used is approximately equal to the thickness of the structure 5.

The backfilling tool thus formed is placed on the concrete panel 10 at the time of pouring the structure 5 at the site, and is temporarily fixed by nailing through the mounting bracket 7 at the position where the piping 8 is to be installed. When concrete is placed on the outside up to the height of the backfilling tool and the concrete panel 10 is removed after hardening, the hole for the inner cylinder 2 is now provided in the structure 5. The piping 8 is pushed into this hole, and the small gap between the inner cylinder 2 and the piping 8 is filled with a small amount of nonflammable filler 11 such as rock wool, thereby completing the piping work.

Incidentally, in order to allow the end plate 3 to move easily within a horizontal plane, it is preferable to provide a plurality of holes (not shown) in the end plate 3.

(Effects of the invention) Since the invention is constructed as described above, backfilling with filler on site is almost unnecessary, reducing the number of on-site man-hours, and the pleated end plates can absorb misalignment and interlayer displacement. It also has the effect of making backfill marks less noticeable.

[Brief explanation of the drawing]

1 to 3 are schematic diagrams showing conventional backfilling tools;
Figures 4 to 6 are schematic diagrams showing an embodiment of the present invention, of which Figures 4 and 5 are views showing before and after piping is installed, respectively, and Figure 6 is a plan view of Figure 5. It is. 1... Outer cylinder, 2... Inner cylinder, 3... End plate, 4...
Filling material, 5...Structure, 8...Piping.

Claims (1)

[Claims for Utility Model Registration] 1. A backfilling tool for sealingly arranging pipes through a deformable filler in a through hole provided in a building structure, the backfilling tool comprising: Structure 5
An outer cylinder 1 is fitted into the outer cylinder to form a through hole and has a height almost the same as the thickness of the structure, and is loosely fitted into the outer cylinder to surround the pipe 8 with a small gap. an inner cylinder 2 having almost the same height as the thickness of the structure, a compressively deformable filler 4 filled between the outer cylinder and the inner cylinder, and one end of each of the outer cylinder and the inner cylinder. A tool for backfilling a pipe penetrating part, comprising an annular end plate 3 connecting the parts to each other, the end plate having concentric folds and being expandable and retractable. 2. The backfilling tool according to claim 1, wherein the height of the outer cylinder and the inner cylinder is formed to be considerably shorter than the thickness of the structure. 3. The backfilling tool according to claim 1, wherein the outer cylinder and the inner cylinder are connected by an end plate having a plurality of perforations.