JP2534766Y2 - Joint structure between manhole lateral hole and sewer - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure between a lateral hole of a manhole and a sewer, and more particularly to a joint structure for press-fitting and closing according to the width of a ring-shaped gap between the lateral hole and the sewer.

[0002]

2. Description of the Related Art A joint of this type is disclosed in Japanese Utility Model Laid-Open No. 3-133.
There is No. 49. In this publication, a cut is made in the width direction of the center of the rubber ring, and a plurality of tightening bolts passing through the cut are inserted at intervals between the inner and outer ends, and the rubber ring is fitted into the lateral hole of the manhole and the lateral hole. It is described that the annular gap is closed by inserting into the annular gap formed between the pipe and the inserted sewer and rotating and tightening each tightening bolt to expand the rubber ring in the non-tightening direction. ing.

[0003]

However, this publication requires a turning operation of the tightening bolt in a narrow annular gap, so that it is not easy to close the annular gap, and the rubber ring has a valley between the tightening bolts. Therefore, there is a problem that the swelling of the portion is insufficient and water leakage occurs.

[0004]

The present invention has a large-diameter portion and a small-diameter portion, and one end of the large-diameter and small-diameter portions is connected by a connecting member having a U-shaped cross section so that the large-diameter portion can be narrowed. A U-shaped gap is provided, a high-hardness rubber is fitted inside the large-diameter portion, and a rubber ring is formed by projecting a collar ring at an outer end of the large-diameter portion on the joining material side, The rubber ring is inserted into the annular gap formed between the side hole of the manhole and the sewer fitted into the side hole.
An object of the present invention is to solve such a problem by press-fitting while widening and narrowing the shape gap and filling the U-shaped space with an elastic sealing material to close the annular space.

[0005]

According to the present invention, the small diameter portion of the rubber ring is inserted into a pipe such as a fume pipe, and the end of the pipe is inserted into the side hole of the manhole, and the rubber ring is adjusted to the thickness of the annular gap to make the U-shaped gap wide and narrow. Then, the rubber ring is pressed into the annular gap by means of tapping or the like until the inner surface of the collar ring comes into contact with the outer surface of the manhole.

The U-shaped gap of the press-fitted rubber ring is filled with an elastic sealing material such as latex mortar or the like to maintain the annular gap.

[0007]

An embodiment will be described below with reference to the drawings.

A large diameter portion 1a made of rubber and formed in a ring body with a rectangular cross section, and formed into a ring shape with a rectangular cross section smaller in width than the large diameter portion 1a arranged inside the large diameter portion 1a at intervals. One end of the rubber small diameter portion 1b is connected by a bendable rubber connecting member 1c to form various rubber rings 1 having large and small diameters. 1d is a high-hardness rubber layer having a hardness of about 90, which is formed by cutting out the inner half of the large-diameter portion 1a and fitted to the cut-out portion. The flange ring 1f is a tapered surface formed by tapering the outer end of the large diameter portion 1a on the side of the non-connecting material 1c, and 1j is a U-shaped gap that can be widened and narrowed. The large-diameter portion 1a pressed against the surface of the lateral hole 3 of the rubber ring 1 is formed in a curved shape in accordance with the curved shape of the lateral hole 3 as shown in FIG.

For the rubber ring 1 formed in this manner, a rubber ring 1 having a diameter suitable for the outer shape of the conduit 4 such as a fume pipe is selected, the small diameter portion 1b is fitted on the outer surface of the conduit 4, and then fitted. The end of the sewer 4 is fitted into the side hole 3 of the manhole 2 and the side hole 3 and the sewer 4
The rubber ring 1 is pushed until the inner surface of the collar ring 1e contacts the outer surface of the manhole 2 while partially expanding the U-shaped gap 1j by partially pressing the large diameter portion 1a in accordance with the thickness of the annular gap S formed therebetween. Press into the inside.

The rubber ring 1 is press-fitted extremely smoothly by the provision of the tapered tapered surface 1f in the large diameter portion 1a and the tension support by the high hardness rubber layer 1d.

An elastic sealing material 5 made of latex mortar or the like is filled from the inside of the manhole 2 into the U-shaped gap of the pressed rubber ring 1 to maintain the U-shaped gap 1j. Cement mortar 6 in the part inside 1
Is filled, whereby the annular gap S formed between the lateral hole 3 of the manhole 2 and the pipe 4 to be fitted is closed in a watertight manner.

Thus, as shown in FIG. 4, even if the annular gap S has an extremely thick and thin portion due to the eccentric fitting of the sewer 4, the rubber ring 1 has the large-diameter portion 1a with the bending of the connecting material 1c. Since the U-shaped gap 1j can be made wider or narrower by a part of the pressing, the press-fitting can be surely performed.

Since the large-diameter portion 1a pressed against the side surface 3 of the rubber ring 1 is formed in a curved shape in accordance with the circular shape of the side hole 3 as described above, the large-diameter portion 1a has a total length of three side holes. To the outside, so that there is no place to go outside.

When the lateral hole 3 is provided on the wall of the part that is not curved by the rectangular box-shaped manhole 2, the rubber ring 1 is formed without a curved part in the large diameter portion 1a as shown in FIG.

FIG. 5 shows a water-expandable rubber or flexible rubber layer 1g, 1h vulcanized and bonded to the outer contact surface of the large-diameter portion 1a and the small-diameter portion 1b pressed against the duct 4 and the lateral hole 3 to waterproof. An example in which the performance is enhanced is shown.

[0016]

As described above, according to the present invention, a U-shaped gap is provided between the large-diameter portion and the small-diameter portion by connecting one end of the large-diameter portion and the small-diameter portion with a connecting member having a U-shaped cross section. Since the rubber ring was formed, even if a thick and thin portion was formed in the ring-shaped gap formed between the side hole of the manhole and the sewer inserted into the side hole, the width of the U-shaped gap accompanied by the bending of the connecting material was adjusted to be wider and narrower. This has the effect of being able to press fit into the annular gap.

Since the collar ring is provided at the outer end of the rubber ring on the joining material side, contact of the collar ring with the outer surface of the manhole confirms press-fitting of the rubber ring into the annular gap and prevents excessive press-fitting. The effect that it can do is produced.

By providing a tapered surface at the outer end of the large diameter portion on the non-joining material side, the large diameter portion can be smoothly press-fitted by the support of the high hardness rubber layer.

By filling an elastic sealing material into the U-shaped gap of the rubber ring pressed into the annular gap, the wide and narrow state of the U-shaped gap can be stably maintained, and the annular gap can be more reliably closed. Is generated.

By forming the large-diameter portion of the rubber ring into a circular shape along the curved shape of the lateral hole of the manhole, there is an effect that both ends of the large-diameter portion do not protrude outside the lateral hole.

By providing a water-swellable rubber or a soft rubber layer outside the large-diameter portion and the small-diameter portion, there is an effect that the watertightness between the lateral hole and the fume tube can be further improved.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional plan view showing one embodiment of a joint structure of the present invention.

FIG. 2 is a partially enlarged view of FIG.

3A is a cross-sectional plan view of a rubber ring, FIG.
It is a partial expanded sectional view.

FIG. 4 is a cross-sectional plan view showing an example of an eccentric fitting of a sewer.

FIG. 5 is a partially enlarged cross-sectional view showing an example in which a water-swellable rubber or a flexible rubber layer is formed.

FIG. 6 is a cross-sectional plan view of a rubber ring showing an example in which a large-diameter portion is not curved.

[Explanation of symbols]

 1 is a rubber ring 1a is a large diameter portion 1b is a small diameter portion 1c is a linking material 1d is a high hardness rubber layer 1e is a flange ring 1f is a tapered surface 1g, 1h is a water-expandable rubber or a soft rubber layer 1j is a U-shaped gap 2 is a manhole 3 is a side hole 4 is a fume pipe etc. 5 is an elastic sealing material 6 is cement mortar

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yukihiro Adachi Nakajo Nitta, Nakanoshima-cho, Minami-Kamabara-gun, Niigata Prefecture (No address) Inside Shinmei Sangyo Niigata Plant (72) Inventor Hiroshi Enonami Nakanoshima-cho, Minami-Kamabara-gun, Niigata Japanese character Nakajo Nitta (No address) Inside Shinmei Sangyo Niigata Factory (56) References JP-A-63-304836 (JP, A) JP-A-51-10652 (JP, A) JP-A-4-333722 (JP, A) Japanese Utility Model Showa 63-95792 (JP, U) Japanese Utility Model Utility Model 4-17043 (JP, U)

Claims (4)

(57) [Scope of request for utility model registration] 1. A large-diameter portion and a small-diameter portion, and one end of the large-diameter and small-diameter portion is connected by a connecting member having a U-shaped cross section to provide a U-shaped gap between the large-diameter portion and the small-diameter portion. A high hardness rubber is fitted inside the large diameter portion, and a rubber ring is formed by projecting a collar ring at an outer end of the large diameter portion on the connecting material side, and the rubber ring is formed in a lateral hole of a manhole. And press-fitting the U-shaped gap into a ring-shaped gap formed between the pipe and a sewer fitted into the side hole while widening and narrowing the U-shaped gap, and filling the U-shaped gap with an elastic sealing material. Joint structure between sewers. 2. The joint structure according to claim 1, wherein the large diameter portion is formed in a curved shape in accordance with the curved shape of the lateral hole of the manhole. 3. A water-swellable rubber or a soft rubber layer is provided outside the large-diameter portion and the small-diameter portion, respectively.
The described joint structure. 4. The joint structure according to claim 1, wherein a tapered surface is provided at an outer end of the large-diameter portion on the non-joining material side.