JPS6337558Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a packing material for preventing water leakage at the joints of bench-type and U-shaped frium pipes (hereinafter referred to as frium pipes) made of reinforced concrete used for side gutters. It is.

Conventionally, for the joints between frium pipes used for side gutters and frium pipes, for example, for bench-type frium pipes, a packing material is used to attach an adhesive to the flat surface of synthetic rubber foam with a semicircular cross section. is used. This packing material is pasted on the joint of a freeum tube, pushed into the socket of another freeum tube, and overlapped, so that the packing material is used in a pinched and compressed state, but the gap between the freeum tube sockets varies. Depending on the situation, the effect of preventing water leakage by filling the entire gap with the packing material may not be sufficiently achieved. In addition, the packing material may be stretched during the pushing process, resulting in insufficient volume, and the incidence of water leakage may reach approximately 50%.

Furthermore, if the ground changes after being compressed for a long period of time and the foam loses its resilience (repulsion), the movement of the frium tube will create gaps and cause water leakage.

Instead of overlapping the frium tubes, they are placed together and a packing material is sandwiched between them. This prevents the packing material from being stretched and becoming insufficient in volume, or from creating gaps due to variations in the frium tubes. This can be considered as a way to resolve this issue. The present invention seeks to avoid such above-mentioned drawbacks.

The present invention is a packing material for preventing water leakage at the junction of reinforced concrete bench type and U-shaped flue pipes used for side gutters.
c are independently provided along the longitudinal direction, and the tops of two cross-sectional hemispheres are joined to each other, and a partition wall support 1b is provided in the middle, and both parallel side surfaces 1a whose cross sections face each other,
This packing material is characterized in that it comprises a drum-shaped synthetic rubber foam strip 1 with butyl rubber adhesive composition layers 2 and 2' on both sides 1a and 1a.

The present invention involves peeling off the release curing paper 3 using a packing material for the joining construction method of frium tubes, pasting it at a predetermined position of the frium tube 4 (if a joint is made, that position) along the curve of the frium tube, and then , by peeling off the other release paper 3' and pressing the freeum tube 5 from the side (or slightly diagonally upward direction), a packing material is sandwiched between the mating surfaces of the freeum tube 4 and the freeum tube 5. wear.

The present invention provides butyl rubber adhesive composition layers 2, 2' on opposite parallel sides 1a, 1a of the packing material.
is pasted, the watertightness is good, and the synthetic rubber foam strip 1 has hollow parts, that is, cavities 1c, 1c.
Therefore, large compressive force is not required.
In addition, by providing the partition wall support 1b in the middle of the foam, it is possible to prevent the foam strip 1 from being deformed more than necessary, and to prevent the foam tube and the adhesive composition layer 2,
2' can be increased in pressure. Another effect of the bulkhead support 1b is that when it is attached to the frium tube 4, if it is not hollow, it will be difficult to bend the curved portion of the frium tube (particularly an angled portion such as a bench frium), and it will simply be hollow. In some cases, it will bend, but this can be prevented.

In addition, the mating method does not require the work of hitting one friyum pipe with a wooden hammer or the like and inserting it into the socket of the other friyum pipe, unlike the pushing and overlapping method, and there is no risk of damaging the concrete. Easy to adjust position.

As mentioned above, the packing material according to the present invention can improve the workability and reliably fill the gap at the joint of the frium tube 1 and the adhesive composition layer 2, and the adhesive composition layer 2 and the foamed material. The foam strip 1 has a drum-shaped cross section and two independent hollows 1c,
1c, so even if the frium tube changes due to the ground, it will easily follow the change, creating a gap compared to conventional cross-sections such as circular, semicircular, or oval. There is no water leakage.

Since the packing material of the present invention has a symmetrical shape, it can be used from either of the parallel sides without worrying about directionality.

In addition, since the adhesive composition layer is attached to the flat part,
The initial adhesion area is large, and there is no need to attach a complicated joint structure to the Furium tube.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing a packing material according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing a main part of a frium tube joint according to the present invention. 1... Synthetic rubber foam strip material, 1a... Parallel both sides,
1b...Partition support, 1c...Cavity, 2,2'...Butyl rubber adhesive composition layer, 3,3'...Release curing paper,
4...Fryum tube joint portion, 5...Fryum tube joint portion.

Claims (1)

[Scope of Claim for Utility Model Registration] In a packing material for preventing water leakage at the junction of reinforced concrete bench-type and U-shaped frium pipes used for side gutters, a hemispherical cavity 1c having a substantially similar shape inside. .
Butyl rubber adhesive composition layer 2,
A packing material characterized by having both 2′.