JPH08296784A - Flexible cut-off joint for sewerage manhole - Google Patents

Abstract

PURPOSE: To adapt a joint even to the eccentricity of a pipe culvert for enabling connection by providing a projecting ring hooked on the outer surface of a manhole on the outer end of an outside rubber tube part of a spacer annular body to press the outside rubber tube part against a side surface hole of the manhole. CONSTITUTION: First in the execution, a spacer annulate 10 is driven into the inside of an outside rubber tube part 2 so that a projecting annulate 1 of a spacer joint body abuts against a side wall of a manhole 8 and the whole surface of the outside rubber tube part 2 is pressed against the inner peripheral surface of a side surface hole 7. Next, a fastening band 11 is wound around the outside of the outer end part of an inside rubber tube part 4 and an inside mold releasing paper is stripped off to expose an adhesive surface 4a. Then, a protective ring 13 is loosely fitted on a pipe culvert 12 inserted into the inside rubber tube part 4. Then, when the inside of the pipe culvert 12 reaches the inner surface of the side surface hole 7, the fastening band 11 is fastened to interconnect the manhole 8 and the pipe culvert 12 and move the protective ring 13 between the spacer annulate 10 and the fastening band 11 for completing the connection.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible water shutoff joint for sewer manholes, and more particularly, it is possible to insert a pipe end into a side hole of a manhole even if there is some misalignment, and to provide earthquake resistance and watertightness. The present invention relates to an excellent flexible waterproof joint.

[0002]

2. Description of the Related Art Conventionally, a joint of this type has been constructed by filling cement mortar between the side holes of a manhole and the pipe ends of a pipe to be inserted, or by press-fitting a rubber ring such as an O-ring. .

[0003]

However, not only the joint made by filling cement mortar but also the joint made by press-fitting a rubber ring such as an O-ring are not sufficiently flexible, so that the ground is not uniform due to an earthquake or impact. When it subsided, there was a problem that the joint part was damaged, external water flowed in, and the pipe was broken.

Further, there is a problem that the pipe end cannot be inserted and connected when the pipe end is displaced or inclined with respect to the side hole of the manhole.

[0005]

SUMMARY OF THE INVENTION According to the present invention, there is provided an outer rubber tubular portion having a hooking protruding ring at an inner end, an outer end, or both inner and outer ends, and an inner folding portion at the inner end of the outer rubber tubular portion. A flexible rubber tube having a double-tube structure having an inverted V-shape, which includes a flexible inner rubber tube portion that is provided with a curved portion and gradually slops outwardly from the bent portion so as to be narrowed and inclined. The water-stop joint is configured to solve such a problem.

[0006]

According to the present invention, the pipe end is eccentric or inclined with respect to the side hole of the manhole due to the inner rubber tubular portion that flexes based on the inner end bent portion between the outer rubber tubular portion and the outer rubber tubular portion. However, the pipe end can be watertightly inserted and connected to the manhole. Further, since the protruding rings for hooking are provided at the outer end, inner end, or both ends of the outer rubber tubular portion, the outer rubber tubular portion will not be separated from the side hole of the manhole.

[0007]

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

An outer rubber tubular portion 2 having a rectangular cross section with a protruding ring 1 at the outer end and an inner end bent portion 3 of the outer rubber tubular portion 2 passes through the inside of the outer rubber tubular portion 2 and the outer end. A ring-shaped spacer joint main body 5 having an inverted V-shaped cross-section is formed by the inner rubber tubular portion 4 protruding outward.

The inner rubber tube portion 4 is made slightly thinner than the outer rubber tube portion 2 and is provided with a gradual narrowing inclination which gradually decreases the diameter from the inner end bent portion 3 toward the outer end, thereby providing flexible flexibility. It has sex. Reference numeral 6 is a V-shaped gap between the inner and outer rubber tube portions.

Reference numeral 7 denotes a side hole formed in the side wall 9 of the manhole 8 for sewerage. The side hole is formed in a curved shape in which the intermediate portion is protruded along the circular shape of the side wall 9. The spacer joint body 5 described above is formed in a curved shape having an intermediate recess shape with the same curvature as the curved shape of the side hole 7.

First, the spacer joint body 5 is pushed from the outside into the side surface hole 7 so that the protruding ring 1 abuts against the outer surface of the side wall 9 of the manhole 8.

A release paper (not shown) is peeled from the outer peripheral surface of the outer rubber tube portion 2 to expose the adhesive surface 2a made of a water-expandable rubber sealing material, and the adhesive surface 2a is exposed. The protruding ring 1 is brought into close contact with the inner peripheral surface of the side hole 7 and hooked on the outer peripheral surface of the side wall 9 of the manhole 8.

Next, a spacer ring 10 formed separately from a hard plastic material such as ABS resin is driven from the outside to the inside of the outer rubber tube portion 2 with the inner diameter of the outer rubber tube portion 2 as the outer diameter size. The inner end of the spacer ring body 10 abuts the outer surface of the inner end bent portion 3 to press the entire surface of the outer rubber tubular portion 2 against the inner peripheral surface of the side surface hole 7. The spacer ring body 10 is formed in a curved shape with an intermediate recess like the spacer joint body 5.

The spacer ring body 10 is driven in to strengthen the attachment of the spacer joint body 5, and the tightening band 11 made of stainless steel is provided on the outer side of the outer end portion of the inner rubber tubular portion 4.
To loosen the inner side of the release paper to expose the adhesive surface 4a, and to prevent the entry of earth and sand into the V-shaped gap 6 in the pipe 12 made of vinyl chloride or the like to be connected. Guard ring 13
Loosely fit, apply a lubricant to the end of the pipe 12 and insert the end of the pipe 12 into the inner rubber tube portion 4, and tighten at the point where the inner end of the pipe 12 reaches the inner surface of the side hole 7. The band 11 is tightened to connect the manhole 8 and the pipe 12 in a watertight manner, and the protection ring 13 is moved between the spacer ring 10 and the tightening band 11 to complete the connection (FIG. 2). Reference numeral 14 is a soft filler such as latex mortar filled between the side holes 7 and the ends of the pipe 12.

Incidentally, as shown in FIG. 3, even if the pipe 12 is inclined or eccentric, the inner rubber tube portion 4 can flexibly cope with the pipe 12, so that the pipe 12 can be connected without any problem. This flexibility makes it possible to adapt to changes after construction.

In FIG. 4, the protruding ring 1 is also provided at the inner end so that the side wall 9 is hooked and sandwiched at both inner and outer ends. 7a
Is a recess for hooking the protruding ring 1 at the inner end, which is provided at the inner end of the side surface hole 7, so that the protruding ring 1 at the inner end does not project inside the manhole 8.

Further, in FIG. 5, withdrawal prevention bands 14 for preventing the spacer ring body 10 from being pulled out are hooked at several places with a space between the outer end portion of the spacer ring body 10 and the outer surface of the side wall 9 of the manhole 8. An example is shown. Each withdrawal prevention band 15 is made of stainless steel and has a strip shape. One end is formed with a hook portion 15a hooked to the outer end of the spacer ring body 5 and the other end is formed with a bolt hole 15b. After being hooked on the outer end of the body 5, the bolt 16 is passed through the bolt hole 15b, and the bolt 16 is screwed and fixed to the threaded insert member 17 which is insert-mounted in place on the outer surface of the side wall 9 of the manhole 8 in advance. To do. As a result, the spacer ring body 5 is reliably prevented from coming off due to vibration or other impacts, and at the same time, the spacer joint body 5 is prevented from coming off to the outside.

[0018]

EFFECTS OF THE INVENTION Since the present invention is constructed as described above, even if the pipes to be connected to the side holes of the manhole are not concentric and are decentered or deviated or inclined, the inner rubber tube portion can be flexible. Due to the flexibility, there is an effect that the connection can be adaptively made.

Due to the flexibility of the inner rubber tubular portion, damage to the joint portion and breakage of the pipe can be prevented even if uneven subsidence occurs due to an earthquake, shock, or excessive load to absorb vibration. Produce an effect.

Since the projecting rings are provided at the inner and outer ends of the outer rubber tubular portion so that the outer rubber tubular portion is hooked to the side wall of the manhole, the outer rubber tubular portion can be detached from the side hole unintentionally even if an excessive impact or pressure is applied. Produces the effect of not being.

When the recess for projecting ring hooking is provided at the inner end of the side hole of the manhole, even if the projecting ring is provided at the inner end of the spacer joint main body, the inner surface of the side wall of the manhole is made smooth, and the foreign matters in the manhole. As a result, it is possible to prevent the occurrence of clogging and clogging.

The fitting of the protective ring brings about an effect that it is possible to prevent intrusion of external earth and sand into the joint.

[Brief description of drawings]

FIG. 1A is a cross-sectional plan view of a spacer joint body, and FIG. 1B is a vertical side view of the same.

FIG. 2 is a cross-sectional plan view showing a usage state.

FIG. 3 is a cross-sectional plan view showing an example of the inclined connection of the conduit.

FIG. 4 is a cross-sectional plan view showing an example in which projecting rings are provided at both inner and outer ends of an outer rubber tubular portion.

FIG. 5 is a cross-sectional plan view showing an example in which a pull-out prevention band is attached.

[Explanation of symbols]

 1 is a protruding ring 2 is an outer rubber tubular portion 3 is an inner end bent portion 4 is an inner rubber tubular portion 5 is a spacer joint body 6 is a V-shaped gap 7 is a side hole 8 is a manhole 9 is a side wall 10 is a spacer ring body 11 Tightening band 12 is pipe 13 is protective ring 14 is filler 15 is anti-extraction band 16 is bolt 17 is insert member

Claims (6)

[Claims] 1. An outer rubber cylinder part which is pushed into and inserted into a side hole of a manhole which is circular or quadrangular in a plan view, and a gradual narrowed slant of an outer end from an inner end bent part of the outer rubber cylinder part. A flexible inner rubber tube portion that is stopped in contact with the outer surface of the insertion tube drain, and for driving the outer rubber tube portion into the side hole of the manhole by driving it from the outside into the inside of the outer rubber tube portion. Of the spacer ring body, and a flexible water stop joint in which a protective ring is fitted between the outer end of the spacer ring body and the outer end portion of the inner rubber tubular portion, the manhole being provided at the outer end of the outer rubber tubular portion. A flexible waterproof joint for sewer manholes, characterized in that a protruding ring is provided on the outer surface of the pipe. 2. An outer rubber cylindrical portion which is pushed into and inserted into a side hole of a manhole which is circular or quadrangular in a plan view, and an outer rubber cylindrical portion which is gradually narrowed toward the outer end from an inner end bent portion and is stretched to be inclined. A flexible inner rubber tube portion that is stopped in contact with the outer surface of the insertion tube drain, and for driving the outer rubber tube portion into the side hole of the manhole by driving it from the outside into the inside of the outer rubber tube portion. Of the spacer ring body, and a flexible water stop joint in which a protective ring is fitted between the outer end of the spacer ring body and the outer end portion of the inner rubber tubular portion, the manhole being provided at the inner end of the outer rubber tubular portion. A flexible water stop fitting for sewer manholes, characterized in that a protruding ring is provided on the inner surface of the pipe. 3. The flexible waterproof joint according to claim 1, wherein projecting rings for hooking the inner and outer surfaces of the manhole are provided at both inner and outer ends of the outer rubber tubular portion. 4. The flexible waterproof joint according to claim 2, wherein a concave portion for projecting ring hook is provided at the inner end of the side hole of the manhole. 5. When the side groove is formed in a manhole having a circular shape in plan view, the outer rubber tubular portion, the inner rubber tubular portion, and the spacer ring body are curved in the shape of an intermediate recess with the same curvature as the side hole. The flexible waterproof joint according to any one of claims 1 to 4, which is formed. 6. The flexible waterproof joint according to claim 1, wherein a pull-out preventing band of the spacer ring is hooked between the outer end portion of the spacer ring and the outer surface of the manhole.