JPH08277538A - Connecting joint for lateral sewer - Google Patents

Abstract

PURPOSE: To prevent ground water from flowing into the inside of a manhole through the clearance between the manhole and a sewer main, and to absorb different kinds of the inner diameters of the fitting hole of the manhole. CONSTITUTION: An elastically deformable rubber joint 4 of which an inside sleeve part 12 is fastened to the periphery of a sewer main 6 with a stainless band 19 and of which an outside sleeve part 13 is mounted on the inner surface of a fitting hole 3 of a manhole 1 through a water-expandable, band-shaped member 8 made of rubber, lies between the inner surface of the fitting hole 3 and the periphery of an insertion part 61 of the sewer main 6. A space 5 with wedge-shaped cross section is inserted into a hollow part 15 of the rubber joint 4, and the interval between the inside sleeve part 12 and the outside sleeve part 13 is expanded by a tapered part 33. In this way, the inside sleeve part 12 of the rubber joint 4 adheres watertightly to the periphery of the insertion part 61 of the sewer main 6 and the outside sleeve part 13 adheres watertightly to the inner surface of the fitting hole 3 of the manhole 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting joint for a mounting pipe for connecting a mounting pipe to a side wall of a drainage basin, a rainwater basin, a manhole or the like.

[0002]

2. Description of the Related Art Conventionally, the mounting of a side wall of a concrete manhole and a mounting pipe such as a fume pipe, a ceramic pipe, or a vinyl chloride pipe has been performed on the inner periphery of the mounting hole drilled on the side wall of the manhole and the mounting pipe. 2. Description of the Related Art There is known a connection joint for a mounting pipe (hereinafter referred to as a conventional technique) in which the both are connected to the outer circumference of an insertion portion via an annular elastic seal member.

[0003]

However, in the prior art, after the mounting pipe is buried, the outer periphery of the insertion portion of the elastic seal member and the mounting pipe is moved by the movement of the mounting pipe due to crustal movement such as ground subsidence or earthquake. If there is a gap between the and the groundwater, there is a problem that groundwater flows into the manhole from around the insertion portion of the mounting pipe.

Further, the inner diameter of the manhole mounting hole is not constant due to the condition of the blade of the cutter for forming the mounting hole. That is, when the blade of the cutter is new, the inner diameter of the mounting hole is large, and when the blade is old, the inner diameter of the mounting hole is small, and it is possible to mount the insertion part of the mounting pipe in the mounting hole with a unified standard connection joint. It was difficult.

An object of the present invention is to provide a connection joint for a mounting pipe which prevents inflow of unknown water such as groundwater into the concrete structure from between the concrete structure and the mounting pipe. Another object of the present invention is to provide a connection joint for a mounting pipe, which can absorb the difference in the inner diameter of the mounting hole of a concrete structure and can mount the insertion portion of the mounting pipe according to a unified standard product.

[0006]

According to a first aspect of the present invention, there is provided a concrete structure having a mounting hole in a side wall, a mounting pipe having an insertion portion inserted into the mounting hole of the concrete structure, and A first cylinder part that is liquid-tightly adhered to the outer periphery of the insertion part of the mounting pipe, a second cylinder part that is liquid-tightly adhered to the inner periphery of the mounting hole of the concrete structure, and one end side of the first cylinder part And an elastic seal member having an annular closing portion for closing the one end side of the second tubular portion, a fixing means for fixing the first tubular portion to the outer periphery of the insertion portion of the mounting pipe, and the concrete structure. A water-expandable rubber mounted between the inner periphery of the mounting hole and the outer periphery of the second tubular portion and the elastic seal member are inserted to form a gap between the first tubular portion and the second tubular portion. A wedge-shaped insert that expands and the outer diameter gradually increases from the front end to the rear end. It was adopted technical means and a thing.

According to a second aspect of the invention, in addition to the connecting joint for the mounting pipe according to the first aspect, the insert is the first joint.
It is characterized in that it has a retaining portion on the outer peripheral surface that abuts on the inner periphery of the tubular portion. According to a third aspect of the present invention, in addition to the connection joint of the mounting pipe according to the first or second aspect, the elastic seal member spreads like a flange on the outer peripheral side at the tip of the second tubular portion, It has a flange part facing the outer wall of the concrete structure, and a sealant is attached between the flange part and the outer wall of the concrete structure.

[0008]

According to the invention described in claim 1, even after the mounting pipe is buried, even if the mounting pipe moves due to crustal movement such as ground subsidence or earthquake, the concrete structure and the mounting pipe are The elastic seal member follows the relative displacement with respect to the insertion portion to generate a gap between the first cylinder portion of the elastic seal member and the insertion portion of the mounting pipe, and the second cylinder portion of the elastic seal member and the concrete structure. The occurrence of a gap between and is suppressed. In particular, since the water-expandable rubber is mounted between the inner periphery of the mounting hole of the concrete structure and the outer periphery of the second tubular portion of the elastic seal member, the second tubular portion of the elastic seal member and the concrete structure are When unknown water enters between and the water-expandable rubber absorbs the unknown water, the water-expandable rubber expands in volume, and a gap between the second cylinder portion of the elastic seal member and the concrete structure is further generated. Can be suppressed.

By inserting the wedge-shaped insert between the first and second cylinders of the elastic seal member, the wedge action of the insert is exerted, and the first cylinder of the elastic seal member is exhibited. And the gap between the second tubular portion and the second tubular portion is expanded. As a result, the outer circumference of the second cylindrical portion of the elastic seal member is liquid-tightly adhered to the inner circumference of the mounting hole of the concrete structure. Therefore, it is possible to prevent the unknown water from flowing into the concrete structure from the outer periphery of the insertion portion of the mounting pipe and the inner periphery of the mounting hole of the concrete structure.

Therefore, since the inner periphery of the mounting hole of the concrete structure and the outer periphery of the insertion portion of the mounting pipe are sealed by the elastic seal member, the inner periphery of the mounting hole of the concrete structure and the insertion of the mounting pipe are inserted. It is possible to prevent the unknown water from flowing into the concrete structure from between the outer circumference of the part and the outer circumference.

Further, since the outer diameter of the insert is gradually increased from the front end to the rear end,
By elastically deforming the elastic seal member toward the outer peripheral side, it is possible to absorb the difference in the inner diameter of the mounting hole of the concrete structure. As a result, even if the inner diameter of the mounting hole of the concrete structure is different depending on the condition of the blade of the cutter that forms the mounting hole, the mounting joint of the mounting pipe that is a unified standard product can be used to mount the concrete structure. The insertion portion of the mounting pipe can be securely attached to the inner circumference of the hole.

According to the second aspect of the invention, the first and second cylindrical portions of the elastic seal member are provided by the retaining portions provided on the outer peripheral surface which abuts the inner periphery of the first cylindrical portion of the insert. It is possible to prevent the insert from falling out of the space. According to the invention as set forth in claim 3, since the sealing material is mounted between the flange portion of the elastic seal member and the outer wall of the concrete structure, therefore, the outer periphery of the second tubular portion of the elastic seal member is It is possible to prevent unknown water from entering the concrete structure from the inner circumference of the mounting hole of the concrete structure.

[0013]

【Example】

[Structure of Embodiment] Next, a connecting joint for a mounting pipe of the present invention will be described based on an embodiment shown in the drawings. FIG. 1 is a diagram showing a connection structure between a manhole and a sewer main. The manhole 1 is a concrete structure of the present invention, is made of concrete and is formed in a box shape, and a lid (not shown) is attached to an upper portion thereof.

A circular mounting hole 3 is formed in the side wall 2 of the manhole 1 by a cutter (not shown) so that the inner peripheral surface is smooth. In the mounting hole 3, a connection joint for sewer main pipe (connection joint for mounting pipe)
10, that is, the rubber joint 4 and the spacer 5 insert the insertion portion 61 of the main sewer pipe 6. The sewage main pipe 6 is a mounting pipe of the present invention, and is, for example, φ200.
It is made of vinyl chloride and is formed into a circular pipe shape, and the manhole 1 and other manholes (not shown) are connected to flow domestic sewage to a sewage treatment plant.

The rubber joint 4 is an elastic seal member of the present invention, and as shown in FIGS. 2 and 3, the inner circumference of the mounting hole 3 of the manhole 1 and the outer circumference of the insertion portion 61 of the sewer main 6. Styrene-butadiene rubber (SB
R) double tubular main body (spacer joint) 7, strip 8 attached to the outer periphery of the double tubular main body 7, and O attached to the side surface of the flange portion 11 of the double tubular main body 7. It is composed of a ring 9 and the like.

The double tubular main body 7 includes a flange portion 11, an inner tubular portion 12, an outer tubular portion 13, a closing portion 14 and a hollow portion 15.
It is composed of The flange portion 11 is the inner tubular portion 12
The annular plate portion is formed in a flange shape from the rear end portion toward the radial direction, and is arranged to face the outer wall surface of the side wall 2 around the mounting hole 3 of the manhole 1. A ring-shaped fitting groove 16 into which the O-ring 9 is fitted is formed on the surface of the flange portion 11 facing the side wall 2. The fitting groove 1
6 may not be provided.

The inner tubular portion 12 is the first tubular portion of the present invention, and comprises an inclined portion 17 and an axial portion 18 so as to be liquid-tightly adhered to the outer periphery of the insertion portion 61 of the main sewer pipe 6. It is clamped and fixed by an annular stainless band 19.
The stainless steel band 19 is the fixing means of the present invention, and is the circumferential groove 2 formed on the outer peripheral surface of the rear end portion of the inner tubular portion 12.
It is set to 0. The circumferential groove 20 may not be provided.

The outer cylindrical portion 13 is the second cylindrical portion of the present invention, is provided on the outer peripheral side of the inner cylindrical portion 12 via the hollow portion 15, and faces the inner peripheral surface of the mounting hole 3 of the manhole 1. A circumferential groove 21 for winding the strip 8 is formed on the outer peripheral surface. The outer cylindrical portion 13 is bonded to the inner circumference of the mounting hole 3 of the manhole 1 by using an adhesive (for example, a butyl rubber adhesive) 23. The circumferential groove 21 may not be provided.

The closing portion 14 is formed in a substantially annular shape, and an end portion (tip portion) of the inner tubular portion 12 on the manhole 1 side and an end portion (tip portion) of the outer tubular portion 13 on the manhole 1 side are ring-shaped. The space between the inner space 22 of the manhole 1 and the hollow portion 15 of the double cylindrical main body 7 is closed by connecting to the.

The hollow portion 15 is formed in a cylindrical shape,
It is formed so as not to transmit the relative displacement between the inner tubular portion 12 and the outer tubular portion 13 to the other tubular portion, and the distance between the inner tubular portion 12 and the outer tubular portion 13 (for example, as it goes into the back side). Wedge-shaped spacer 5 that gradually expands 10 mm)
Has been inserted.

The spacer 5 is the insert of the present invention, and as shown in FIGS. 2 and 4, the cylindrical portion 31 inserted into the hollow portion 15 and the rear end portion of the cylindrical portion 31. It has a collar-shaped portion 32. In addition, the cylindrical portion 31
A taper-shaped portion 33 is formed on the outer periphery of the tapered portion 33, the outer diameter of which gradually decreases from the rear end portion toward the front end portion. The tapered portion 33 is formed with a plurality of protrusions 34 that come into contact with the inner peripheral surface of the outer tubular portion 13 of the double tubular main body 7. These protrusions 34 are the retaining portions of the present invention, and are provided around the tapered portion 33, and the spacer 5 is attached to the double cylindrical main body 7.
This is for making it difficult for the spacer 5 to come off when inserted into the inside.

The strip 8 is the water-expandable rubber of the present invention, and is bonded to the circumferential groove 21 of the outer tubular portion 13 of the double tubular main body 7 by a resin adhesive or the like, and contains water to increase the volume. It is a water-swellable rubber that expands. The O-ring 9 is the seal member of the present invention, and is fitted in the fitting groove 16 of the flange portion 11 of the double-tube body 7. The O-ring 9 is a water-expandable rubber that expands in volume when it contains water, and serves to stop water between the flange portion 11 of the double cylindrical main body 7 and the wall surface of the side wall 2 of the manhole 1.

[Operation of Embodiment] Next, a method of attaching the rubber joint 4 and the sewer main pipe 6 to the manhole 1 will be briefly described with reference to FIGS. 1 to 5.

First, the rubber joint 4 is inserted into the mounting hole 3 formed in the side wall 2 of the manhole 1. Next, FIG.
As shown in, the wedge-shaped spacer 5 is driven into the hollow portion 15 of the rubber joint 4 with a hammer or the like. Therefore, the wedge action of the spacer 5 is exerted, and the outer peripheral surface of the outer tubular portion 13 of the SBR double tubular main body 7 is attached to the mounting hole 3 of the manhole 1.
Liquid-tightly adheres to the inner peripheral surface of the outer cylindrical portion 13 and the mounting hole 3
The strip 8 is sandwiched between and. Further, the gap between the outer circumference of the inner tubular portion 12 of the rubber joint 4 and the inner circumference of the outer tubular portion 13 is separated by about 20 mm.

Next, the insertion portion 61 of the main sewer pipe 6 is inserted into the inner cylindrical portion 12 of the rubber joint 4, and sandbags or the like are stacked to adjust the height of the main sewer pipe 6. Further, the main sewer pipe 6 may be mounted such that the longitudinal direction of the main sewer pipe 6 is inclined with respect to the mounting hole 3 of the manhole 1 by a predetermined angle in the vertical direction or the horizontal direction (for example, 1 ° to 20 °).

At this time, even if the inner diameter of the mounting hole 3 of the manhole 1 is deviated from the unified standard, the tapered portion 33 of the spacer 5 is further provided with the outer cylindrical portion 1 of the rubber joint 4.
3 is pushed and expanded so as to be pressed against the inner peripheral surface of the mounting hole 3 of the manhole 1, and the shape is firmly held.

As a result, the distance between the inner tubular portion 12 and the outer tubular portion 13 on the lower side of the rubber joint 4 is expanded by elastic deformation, and the outer tubular portion 13 of the rubber joint 4 is formed on the inner periphery of the mounting hole 3 of the manhole 1. By firmly adhering the outer circumference,
Liquid tightness between the inner periphery of the mounting hole 3 of the manhole 1 and the outer periphery of the outer cylindrical portion 13 of the rubber joint 4 is maintained.

Finally, as shown in FIGS. 1 and 2,
By tightening the stainless steel band 19, the inner cylindrical portion 12 of the rubber joint 4 is inserted into the insertion portion 61 of the sewer main pipe 6.
The insertion portion 61 of the sewage main pipe 6 is mounted in the mounting hole 3 of the manhole 1 by making liquid-tight contact with the outer periphery of the.

[Effects of Embodiment] As described above, in this embodiment, since the tapered portion 33 is formed in the spacer 5, the spacer 5 is inserted into the hollow portion 15 so that the rubber joint 4 The outer cylindrical portion 13 is elastically deformed to the outer peripheral side, so that the mounting hole 3 of the manhole 1 is
It is possible to absorb the difference in inner diameter of the. As a result, even if the inner diameter of the mounting hole 3 of the manhole 1 is different, that is, when the blade of the cutter that drills the mounting hole 3 is new, the inner diameter of the mounting hole becomes large, or when the blade becomes old, the mounting hole becomes large. Even if the inner diameter of the sewage pipe becomes small, the connection part 10 (rubber joint 4 and spacer 5) for the sewage main pipe, which is a standardized product, is provided on the inner periphery of the mounting hole 3 of the manhole 1 for inserting the sewage main pipe 6. Can be securely attached.

Further, in this embodiment, after the sewage main 6 is buried, the manhole 1 and the insertion part 61 of the sewage main 6 are moved relative to each other due to a large external force load due to crustal deformation such as ground subsidence or an earthquake. Even when it is displaced, the relative displacement between the manhole 1 and the end of the sewer main 6 is followed by the elastic deformation of the substantially U-shaped rubber joint 4 having the inner tubular portion 12, the outer tubular portion 13, and the closing portion 14.

Even if the mounting hole 3 of the manhole 1 and the insertion portion 61 of the main sewer pipe 6 are not connected concentrically, the rubber joint 4 follows the connecting position of the main sewer pipe 6 by elastic deformation. The insertion part 61 of the sewer main pipe 6 and the rubber joint 4 can be attached to the attachment hole 3 of the manhole 1 by using the stainless band 19, the spacer 5 and the adhesive 17.

Therefore, a gap is generated between the inner periphery of the mounting hole 3 of the manhole 1 and the outer periphery of the outer cylindrical portion 13 of the rubber joint 4, and the inner periphery of the inner cylindrical portion 12 of the rubber joint 4 and the sewer main pipe 6. It is possible to prevent the formation of a gap between the outer periphery of the insertion portion 61 and the outer periphery of the insertion portion 61. This maintains the watertightness between the inner periphery of the mounting hole 3 of the manhole 1 and the outer periphery of the insertion portion 61 of the sewer main pipe 6, so that the outer periphery of the insertion portion 61 of the sewer main pipe 6 and the mounting hole 3 of the manhole 1 are maintained. It is possible to prevent the inflow of unknown water such as groundwater into the manhole 1 from the inner circumference of the.

[Modification] In this embodiment, the fastening means is the fastening by the stainless steel band 19, but the fastening means may be fixed by an adhesive or the like.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a connection structure between a manhole and a sewer main according to the present invention.

FIG. 2 is a front view showing a rubber joint and a spacer according to the present invention.

FIG. 3 is a sectional view showing a rubber joint according to the present invention.

FIG. 4 is a perspective view showing a spacer according to the present invention.

FIG. 5 is a cross-sectional view showing a process of attaching the attachment pipe to the manhole.

[Explanation of symbols]

 1 Manhole (Concrete Structure) 2 Sidewall 3 Mounting Hole 4 Rubber Joint (Elastic Seal Member) 5 Spacer (Insert) 6 Sewage Main Pipe (Mounting Pipe) 7 Double Cylindrical Body 8 Band (Water-Expandable Rubber) 9 O-ring (sealing material) 10 Sewage main pipe connection joint (mounting pipe connection joint) 11 Flange portion 12 Inner tubular portion (first tubular portion) 13 Outer tubular portion (second tubular portion) 14 Closure portion 19 Stainless band (fixing means) ) 33 taper-shaped part 34 projection part (prevention part) 61 insertion part

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[Procedure amendment]

[Submission date] April 10, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 2

[Correction method] Change

[Correction content]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

According to a second aspect of the present invention, in addition to the connecting joint of the mounting pipe according to the first aspect, the insert is the second pipe.
It is characterized in that it has a retaining portion on the outer peripheral surface that abuts on the inner periphery of the tubular portion. According to a third aspect of the present invention, in addition to the connection joint of the mounting pipe according to the first or second aspect, the elastic seal member spreads like a flange on the outer peripheral side at the tip of the second tubular portion, It has a flange part facing the outer wall of the concrete structure, and a sealant is attached between the flange part and the outer wall of the concrete structure.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

According to the second aspect of the invention, the first and second cylindrical portions of the elastic seal member are provided by the retaining portions provided on the outer peripheral surface of the insert which contacts the inner periphery of the second cylindrical portion. It is possible to prevent the insert from falling out of the space. According to the invention described in claim 3, the flange portion of the elastic sealing member and a sealing material between the outer wall of the concrete structure that <br/> that is mounted, the second cylindrical portion of the elastic sealing member It is possible to prevent the intrusion of unknown water into the concrete structure from the outer circumference of the concrete structure and the inner circumference of the mounting hole of the concrete structure.

Claims (3)

[Claims] 1. A concrete structure having (a) a mounting hole in a side wall, (b) a mounting pipe having an insertion portion inserted into the mounting hole of the concrete structure, and (c) an insertion of the mounting pipe. A first cylinder part that is liquid-tightly adhered to the outer periphery of the first part, a second cylinder part that is liquid-tightly adhered to the inner periphery of the mounting hole of the concrete structure, and one end side of the first cylinder part and the second part An elastic seal member having an annular closing portion for closing one end side of the tubular portion; (d) a fixing means for fixing the first tubular portion to the outer periphery of the insertion portion of the mounting pipe; (e) the concrete structure A water-expandable rubber mounted between the inner periphery of the object mounting hole and the outer periphery of the second tubular portion, and (f) the first tubular portion and the second tubular portion inserted into the elastic seal member. The wedge-shaped insertion that increases the outer diameter gradually from the front end to the rear end while expanding the space between Connection fitting attachment tube with an object. 2. The connection joint for a mounting pipe according to claim 1, wherein the insert has a retaining portion on an outer peripheral surface that abuts an inner periphery of the first tubular portion. Connection fittings. 3. The connection joint for a mounting pipe according to claim 1, wherein the elastic seal member spreads like a flange on the outer peripheral side at the tip of the second tubular portion, and the outer wall of the concrete structure. A connecting member for a mounting pipe, characterized in that a sealing material is mounted between the flange portion and an outer wall of the concrete structure.