JPH0514240U - Joint structure between horizontal hole of manhole and pipe - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention has a joint structure between a lateral hole of a manhole and a pipe that is fitted into the lateral hole. Even if a wide and narrow portion is formed in the gap between the lateral hole due to eccentric fitting of the pipe, Its main purpose is to obtain a rubber ring that can be adapted and filled. [Constitution] The present invention has a large diameter portion 1a and a small diameter portion 1b, and connects the large and small diameter portions 1a and 1b with an integral connecting member 1c so that a U-shaped gap 1j is present between the large and small diameter portions. A rubber ring 1 is formed by embedding a high hardness rubber 1d inside the large diameter portion 1a and projecting a collar ring 1e at one end of the outer surface of the large diameter portion 1a. The U-shaped gap 1j is press-fitted into the ring-shaped gap S including the eccentricity between the lateral hole 3 and the pipe 4 fitted into the lateral hole 3 while widening the U-shaped gap 1j, and the U-shaped gap 1j is filled with the elastic seal material 5 after the press-fitting. It is in the joint structure between the horizontal hole of the manhole and the pipe.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a joint structure between a lateral hole of a manhole and a pipe, and more particularly to a joint structure for sealing a ring-shaped gap including the eccentricity between the lateral hole and the pipe in a watertight manner.

[0002]

[Prior Art]

 Japanese Patent Application No. 3-27106 discloses a joint structure of this type. The actual application is a rubber ring to be inserted between a horizontal hole of a manhole and a pipe fitted into the horizontal hole, the rubber ring being formed wider than the horizontal hole of the manhole, and at inner and outer ends of the rubber ring. A joint structure between a manhole and a pipe is described in which the peripheral surface of the lateral hole and the outer surface of the insertion pipe are pressed together with a water-expandable rubber.

[0003]

[Problems to be solved by the device]

 However, in this application, one end of the rubber ring is projected to the outside of the lateral hole of the manhole, and the protruding portion is pressed against the outer surface of the pipe that is fitted into the lateral hole. Therefore, the protruding portion is damaged by external rocks. There were challenges.

[0004]

[Means for Solving the Problems]

 The present invention has a large-diameter portion and a small-diameter portion, and connects the large-small diameter portion with an integral tie member to leave a U-shaped gap between the large-small diameter portion and a high-diameter portion inside the large-diameter portion. A rubber ring is formed by embedding a hard rubber and projecting a collar ring at one end of the outer surface of the large-diameter portion. The rubber ring includes a lateral hole of a manhole and an eccentricity between pipe tubs fitted into the lateral hole. The U-shaped gap is press-fitted into the ring-shaped gap while widening it, and the elastic sealing material is filled in the U-shaped gap to solve the above problem.

[0005]

【Example】

 Embodiments will be described below with reference to the drawings.

The large-diameter portion 1a having an outer diameter slightly larger than the diameter of the lateral hole 3 of the manhole 2, and a diameter slightly smaller than the outer diameter of the pipe 4 such as a fume pipe fitted in the lateral hole 3 of the manhole 2 described above. A rubber ring 1 having a small-diameter portion 1b and connecting the large-diameter portion 1a and the small-diameter portion 1b with an integral tie member 1c is formed in various sizes according to size and having an inverted U-shaped cross section. The large-diameter portion 1a is embedded with a high-hardness rubber layer 1d having a hardness of about 90 integrally or separately in order to give shape retention to the inner side, and is curved according to the curvature of the lateral hole 3 of the manhole 2 which is circular in plan view. Further, the large diameter portion 1a has a collar ring 1e projecting at the outer end portion on the side of the tie member 1c so as to be fastened to the outer edge of the lateral hole 3 of the manhole 2 and the end portion of the outer surface on the non-collar ring 1e side is formed first. A taper 1f with a small diameter is attached to the outer surface. Note that 1j is a U-shaped gap formed between the large diameter portion 1a and the small diameter portion 1b.

A rubber ring 1 is previously fitted to a pipe 4 such as a fume pipe by using a small diameter portion 1b, the pipe 4 is fitted into a lateral hole 3 of a manhole 2, and then the fitted rubber ring 1 is laterally drilled. 3 is moved to the ring-shaped gap S between the pipe 3 and the pipe 4, and is fitted by using a means such as tapping. Since the high hardness rubber layer 1d is provided inside the large-diameter portion 1a, the large-diameter portion 1a comes into pressure contact with the lateral hole 3 due to its shape retaining function. After the fitting, the U-shaped gap 1j between the large diameter portion 1a and the small diameter portion 1b is filled with an elastic sealing material 5 such as latex mortar to close it, and then the periphery is filled with the cement mortar 6 to fill it. The horizontal hole 3 of the manhole 2 and the pipe 4 are closed and connected in a watertight manner.

As shown in FIG. 4, even if the ring-shaped gap S between the lateral hole 3 of the manhole 2 and the pipe 4 is widened due to the eccentric fitting of the pipe 4, the rubber ring 1 has a U-shaped gap 1j. Then, the U-shaped gap 1j widens with the bending of the tie member 1c, so that the ring-shaped gap S is surely filled.

FIG. 5 shows that the water-expandable rubber or flexible rubber layers 1g and 1h are formed by vulcanization adhesion on the outer contact surfaces of the large diameter portion 1a and the small diameter portion 1b of the rubber ring 1 to further enhance the waterproof function. This is an example.

FIG. 6 shows an example of a rubber ring 1 formed without bending the large-diameter portion 1a for a lateral hole provided in a non-curved part surface wall of a square or arch-shaped manhole in plan view. Is.

[0011]

[Effect of the device]

 As described above, according to the present invention, the large diameter portion is closely fitted to the lateral hole of the manhole without the need for an adhesive or other material due to the shape-retaining function of the high hardness rubber layer provided inside the large diameter portion. Further, since the collar ring is provided, there is an effect that the rubber ring can be easily tapped and press-fitted, and the rubber ring can be stably fitted in the ring-shaped gap without displacement.

By bending the large diameter portion of the rubber ring along the curved shape of the lateral hole, it is possible to prevent both end portions of the rubber ring from protruding outside the lateral hole.

Since the U-shaped gap can be provided in the rubber ring to widen and narrow between the large diameter portion and the small diameter portion, the U-shaped gap can be reliably widened even if the pipe is eccentrically fitted in the lateral hole. The effect is that it can be pressed into the gap and filled.

Since the small diameter portion of the rubber ring is fitted into the pipe ditch and fitted into the lateral hole, the rubber ring has an effect of buffering and preventing damage to the lateral hole and the pipe ditch end.

Since the large-diameter portion and the small-diameter portion of the rubber ring remain in the lateral hole, there is an effect that damage due to external rocks does not occur.

By further filling the U-shaped gap between the large-diameter portion and the small-diameter portion with an elastic sealing material or the like, and attaching water-expandable rubber to the outside of the large-diameter portion and the small-diameter portion, the watertightness is further improved. The effect of being able to

[Brief description of drawings]

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

FIG. 2 is a partially enlarged view of the same.

3A is a cross-sectional plan view of a rubber ring, and FIG. 3B is a partially enlarged cross-sectional view of the same.

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

FIG. 5 is a partially enlarged cross-sectional view showing an example in which a water-swellable rubber or 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 part 1b is a small diameter part 1c is a connecting material 1d is a high hardness rubber layer 1e is a collar ring 1f is a taper 1g, 1h is a water-expandable rubber or flexible rubber layer 1j is a U-shaped gap 2 Is a manhole 3 is a lateral hole 4 is a fume pipe or the like 5 is an elastic sealing material 6 is cement mortar

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Yukihiro Adachi, Nakanoshima, Minamikanbara-gun, Niigata Prefecture Nakajo Nitta (no address) Shinmei Sangyo Niigata Factory (72) Inventor, Enoki Hiroshi Nakanoshima-machi, Minamikanbara-gun, Niigata Prefecture Nakajo Nitta (No address) Shinmei Sangyo Niigata Factory

Claims (4)

[Scope of utility model registration request] 1. A large-diameter portion and a small-diameter portion, wherein the large-small diameter portion is connected by an integral tie member to leave a U-shaped gap between the large-small diameter portion and the inside of the large-diameter portion. A rubber ring is formed by embedding a high-hardness rubber and projecting a collar ring at one end of the outer surface of the large-diameter portion. The rubber ring is provided with an eccentricity between a manhole lateral hole and a pipe ditch fitted into the lateral hole. A joint structure between a lateral hole of a manhole and a pipe, which is characterized in that the U-shaped gap is press-fitted into the ring-shaped gap while widening the U-shaped gap, and the U-shaped gap is filled with an elastic sealing material after the press-fitting. 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-expandable rubber or flexible rubber layer is provided outside the large diameter portion and the small diameter portion, respectively.
The joint structure described. 4. The joint structure according to claim 1, wherein the outer surface of the large diameter portion is provided with a taper having a small diameter at the end portion on the non-collar ring side.