JP3248563B2 - Mounting ring for manhole joint - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting ring for a manhole joint for providing a flexible waterhole to a flexible manhole joint for connecting a manhole and a connecting pipe.

[0002]

2. Description of the Related Art Usually, manholes scattered in a piping system for drainage or the like are damaged or damaged even when an external force such as an earthquake is applied to a mounting hole in which the upstream and downstream pipings penetrate through a concrete peripheral wall.
It is connected via a rubber manhole joint having flexibility so as not to leak water. 4 to 7 show a conventional method of connecting a manhole and a connecting pipe. FIG. 4 is a sectional view of a main part of the manhole and the connecting pipe in a state where the connection is completed.
FIG. 5 is a partially cutaway front view showing a state before mounting a manhole joint mounting ring 6 for expanding the inner peripheral surface of the flexible manhole joint 4, and FIG. 6 is a sectional view of a portion A in FIG. FIG. 7 is a cross-sectional view showing a state after mounting the portion A in FIG.

A conventional mounting ring 6 for a manhole joint is:
A part of a flexible rubber manhole joint 4 is fitted into a mounting hole 2 penetrated through the peripheral wall of the manhole 1 and further expanded concentrically with the manhole joint 4 along the inner peripheral surface of the manhole joint 4. Thereby, sealing between the outer peripheral surface of the manhole joint 4 and the inner surface of the mounting hole 2 has been achieved.
On the other hand, the end of the manhole joint 4 opposite to the manhole is
The outer peripheral surface was tightened by another mounting ring 5 so as to tighten the connection pipe 3 inserted into the manhole joint 4, and the pipe connection to the manhole 1 was completed.

[0004] A substantially annular hoop portion 7 having a flange portion 8 integrally formed along the circumferential edge thereof, and one end portion of the hoop portion 7 is plug-welded to an outer peripheral surface between both end portions of the hoop portion 7. And
The mounting ring 6 for a manhole joint, which is composed of another hoop portion 10 having a relatively short arc-shaped overlap region with a locking claw 11 protruding at the other end, is provided with the manhole joint 4.
When the hoop portion is extended concentrically with the manhole joint 4 along the inner peripheral surface of the hoop portion, the extension portion 12 is composed of a pair of extension legs suspended from a screw shaft to which a turnbuckle is screwed. The extension means is attached to an upper surface of the hoop portion 7 or cut out from the upper surface of the hoop portion 7.
A pair of twelve extended legs are brought into contact with each other, and the turnbuckle is rotated to gradually expand the space between both ends of the hoop portion 7,
By engaging the locking claw 11 with one end of the expanded hoop portion 7, the crimping and fixing of the manhole joint mounting ring 6 and the outer peripheral surface of the manhole joint 4 and the inner surface of the mounting hole 2 are performed. Sealing between them was attempted.

[0005]

However, the mounting ring 6 for the conventional manhole joint has a structure in which the fixing position by the locking claw 11 is limited to one place, and therefore, the mounting ring 6 is provided through the peripheral wall of the manhole 1. If the diameters of the mounting hole 2 and the manhole joint 4 vary, it is difficult to provide sufficient sealing performance. In addition, since the extension leg receiving portion 9 has a structure in which a flat plate is bent or cut and raised, the strength tends to be insufficient for a relatively large expansion force.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, reliably copes with variations occurring in the diameters of the mounting hole and the manhole joint, and facilitates the mounting operation and increases the mechanical strength. It is an object of the present invention to provide a mounting ring for a vehicle.

[0007]

SUMMARY OF THE INVENTION The object of the present invention is as follows.
A part of a flexible manhole joint is inserted into a mounting hole provided in a perimeter wall of the manhole, and is expanded concentrically with the manhole joint along the inner peripheral surface of the manhole joint. A mounting ring for a manho joint for sealing between an outer peripheral surface of the mounting hole and an inner surface of the mounting hole, wherein the mounting ring for a manhole joint integrally forms a flange portion along a circumferential edge thereof; An annular hoop portion having an overlap region sufficient to enable the two terminal portions to be locked together with the expansion, further comprising an inner peripheral end portion of the hoop portion in the overlap region. And the vicinity thereof partially removes the flange portion, and has a plurality of serrated claw portions on an inner peripheral surface thereof, and the hoop portion in the overlap region has an outer peripheral end thereof. A claw engaging portion capable of engaging the claw portion across the claw portion in the vicinity of the claw portion, wherein the inner and outer peripheral terminals are located outside the overlap region. And a mounting ring for a manhole joint, which is provided with an extended leg receiving portion.

Further, the object of the present invention is achieved by a mounting ring for a manhole joint, wherein the claw portion is formed by press molding.

Further, this object of the present invention is achieved by a mounting ring for a manhole joint, wherein the extension leg receiving portion is formed by bending the flange portion.

A further object of the present invention is to provide a manhole joint for a manhole joint, wherein the hoop portion is formed to have a substantially U-shaped cross-sectional shape of the overlap region and other regions except the vicinity thereof. Achieved by a mounting ring.

In the fitting ring for a pipe joint according to the present invention, a part of a flexible manhole joint is fitted into a through hole provided in a peripheral wall of the manhole, and the manhole extends along the inner peripheral surface of the manhole joint. A mounting ring for a manhole joint, which expands concentrically with the joint to seal the outer peripheral surface of the manhole joint and the inner surface of the mounting hole, wherein the mounting ring for a manhole joint has a flange portion formed by a circle. A hoop portion formed integrally along the peripheral edge, and further formed in an annular shape with an overlap area sufficient to enable the locking of the two ends at the time of the expansion,
Further, the inner peripheral side end portion of the hoop portion and the vicinity thereof in the overlap region partially remove the flange portion, and include a plurality of saw-like claw portions on the inner peripheral surface thereof, The hoop portion in the overlap region includes a claw locking portion that can cross over the claw portion and lock the claw portion in the vicinity of the outer peripheral side terminal portion, and the inner and outer peripheral side terminal portion is provided. Since each of the flange portions located outside the overlap region is provided with an extended leg receiving portion, the flange portion is securely press-bonded and fixed in correspondence with variations occurring in the mounting hole of the manhole and the diameter of the manhole joint. Thus, it is possible to provide a mounting ring for a manhole joint in which the mounting operation is easy and the mechanical strength is increased.

Further, in the mounting ring for a manhole joint according to the present invention, since the claw portion is formed by press molding, the plurality of claw portions having a uniform thickness and increased mechanical strength can securely press-fit. Can be fixed.

Furthermore, in the mounting ring for a manhole joint according to the present invention, since the extension leg receiving portion is formed by bending the flange portion, the mechanical strength is increased.

Further, in the mounting ring for a manhole joint according to the present invention, since the hoop portion is formed to have a substantially U-shaped cross-sectional shape in the other region except the overlap region and the vicinity thereof, the bending stiffness is improved. And the mechanical strength is increased.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the mounting ring for a manhole joint according to the present invention will be described in detail below with reference to the accompanying drawings. Note that members common to the above-mentioned conventional manhole joint mounting ring will be described using the same reference numerals. FIG. 1 is a front view showing a state in which a part of a mounting ring 20 for a manhole joint according to the present invention is broken and before mounting, FIG. 2 is a plan view of a portion B in FIG. 1, and FIG. 3 is a CC line in FIG. It is sectional drawing cut | disconnected along.

The mounting ring 20 for a manhole joint of the present invention, like the mounting ring 6 for a conventional manhole joint described above, has a manhole joint 4 having flexibility in a mounting hole 2 provided in a peripheral wall of the manhole 1. A part is inserted and expanded concentrically with the manhole joint 4 along the inner peripheral surface of the manhole joint 4, thereby achieving a seal between the outer peripheral surface of the manhole joint 4 and the inner surface of the mounting hole 2. I have. Further, the mounting ring 20 for the manhole joint has a flange portion.
22 is integrally formed along the circumferential edges on both sides thereof, and further has an annular area 26 having an overlap region 26 sufficient to enable the locking of the two ends at the time of the expansion. Consists of part 21.

The inner peripheral end portion 27 of the hoop portion 21 and the vicinity thereof in the overlap region 26 can be easily overlapped with an outer peripheral end portion 28 described later by partially removing the flange portion 22. On the other hand, a plurality of saw-like claw portions 23 are provided on the inner peripheral surface. The hoop portion 21 in the overlap region 26 crosses over the claw portion 23 near its outer peripheral side terminal portion 28 and
A claw locking portion 25 capable of locking the 23 is provided. Furthermore, the inner and outer peripheral side terminal portions 27 and 28 are attached to the respective flange portions 22 located outside the overlap region 26 by extension leg receiving portions 24.
It consists of.

The manhole joint mounting ring 20 extends along the inner peripheral surface of the manhole joint 4.
In the case of expanding concentrically with the expansion means 12, the expansion means 12 consisting of a pair of expansion legs suspended openably with respect to a screw shaft to which a turnbuckle is screwed is attached to the inner surface of each of the expansion leg receiving portions 24. A pair of extension legs are brought into contact with each other, and the turnbuckle is rotated to gradually expand the space between the two end portions of the hoop portion 21. After selecting and passing through a passage having a narrow inclined surface of the claw locking portion 25 by being elastically deformed so as to slightly push up, the locking claw is formed on the cut end surface of the continuous claw locking portion 25.
By engaging the engagement 23, the crimping and fixing of the manhole joint attachment ring 6 and the sealing between the outer peripheral surface of the manhole joint 4 and the inner surface of the attachment hole 2 are easily and reliably performed.

It should be noted that the flange portion 22 is connected to the hoop portion.
Depending on the size, diameter, and the like of the hoop portion 21, the hoop portion 21 can be changed so as to be integrally formed along one circumferential edge. Further, as shown by a broken line in FIG. 3, the claw portion 23 can be press-formed from the inner peripheral side terminal portion 27 and the outer peripheral surface in the vicinity thereof, and has a uniform thickness by this press molding. Thus, a plurality of serrated claw portions 23 having increased mechanical strength are obtained. Since the extension leg receiving portion 24 is formed by bending the flange portion 22, even if a large extension force is applied by the extension means 12, the extension leg receiving portion 24 is not easily deformed, and the extension operation is performed properly.

Further, the hoop portion 21 is formed to have a substantially U-shaped cross-sectional shape with the flange portion 22 except for the overlap region 26 and other regions except the vicinity thereof, thereby increasing bending rigidity and expanding the hoop portion. Thus, the crimping and fixing are performed while maintaining an appropriate curvature even in the case of the increased diameter.

[0021]

The above-described mounting ring 20 for a manhole joint according to the present invention has the following novel effects. That is, the mounting ring 20 for a manhole joint of the present invention fits a part of the manhole joint 4 having flexibility into the mounting hole 2 penetrated through the peripheral wall of the manhole 1, The manhole joint mounting ring 20 that expands concentrically with the manhole joint 4 along an inner peripheral surface to seal the outer peripheral surface of the manhole joint 4 and the inner surface of the mounting hole 2. The mounting ring 20 for the manhole joint is
Is formed integrally along the circumferential edge thereof, and furthermore, the hoop portion is formed in an annular shape with the overlap region 26 sufficient to enable the locking of the two ends at the time of the expansion. Further, the inner peripheral side end portion 27 of the hoop portion 21 and the vicinity thereof in the overlap region 26 partially remove the flange portion 22 while a plurality of saw teeth are formed on the inner peripheral surface thereof. The hoop portion 21 in the overlap region 26, the hoop portion 21 traverses above the claw portion 23 near the outer peripheral side terminal portion 28, and
And the inner and outer peripheral end portions 27 and 28 have the extended leg receiving portions 24 on the respective flange portions 22 located outside the overlap region 26. Therefore, it is possible to securely cope with and fix the variation generated in the diameter of the mounting hole 2 of the manhole 1 and the diameter of the manhole joint 4 and to easily perform the mounting operation and increase the mechanical strength. It has become possible to provide the mounting ring 20 for a manhole joint described above.

Further, in the mounting ring 20 for a manhole joint of the present invention, since the claw portions 23 are formed by press molding, the plurality of claw portions 23 having a uniform thickness and an increased mechanical strength are reliably provided. It is now possible to crimp and fix it.

Further, in the mounting ring 20 for a manhole joint according to the present invention, since the extension leg receiving portion 24 is formed by bending the flange portion 22, the mechanical strength can be increased.

Further, in the mounting ring 20 for a manhole joint according to the present invention, the hoop 21
Since the cross-sectional shape of the other region except for the vicinity thereof is substantially U-shaped, the bending rigidity thereof is increased, and the mechanical strength can be increased.

[Brief description of the drawings]

FIG. 1 is a front view showing a state in which a part of a mounting ring for a manhole joint of the present invention has been partially broken and before mounting.

FIG. 2 is a plan view of a portion B in FIG.

FIG. 3 is a sectional view taken along the line CC of FIG. 2;

FIG. 4 is a cross-sectional view of a main part of a conventional manhole joint mounting ring, a manhole, and a connection pipe in a state where connection is completed.

FIG. 5 is a partially cutaway front view showing a state before mounting of a conventional manhole joint mounting ring for expanding an inner peripheral surface of a flexible pipe joint.

FIG. 6 is a sectional view of a portion A in FIG. 5;

FIG. 7 is a cross-sectional view showing a state after mounting the part A in FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Manhole 2 Mounting hole 3 Connecting pipe 4 Manhole joint 5 Another mounting ring 6 Conventional mounting ring for manhole joint 7 Hoop part 8 Flange part 9 Extension leg receiving part 10 Another hoop part 11 Locking claw part 12 Expansion means 20 Mounting ring for manhole joint of the invention 21 Hoop section 22 Flange section 23 Claw section 24 Extended leg receiving section 25 Locking claw section 26 Overlap area 27 Inner peripheral end section 28 Outer peripheral end section

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshio Yubara 23-5 Senju Tatsudacho, Adachi-ku, Tokyo Inside Taisei Kogyo Co., Ltd. (72) Inventor Tatsuro Toyota 2-2-2-8 Mishino-cho, Nishi-ku, Hiroshima City, Hiroshima Prefecture Nishikawa Rubber Industries Co., Ltd. (72) Inventor Kazunori Hisaga 2-2-8 Mishino-cho, Nishi-ku, Hiroshima City, Hiroshima Prefecture Nishikawa Rubber Industries Co., Ltd. (72) Inventor Hisayoshi Nakanishi 425-29 Hiraicho, Kusatsu-shi, Shiga Examiner Takayoshi Fukada (56) References JP-A-7-305367 (JP, A) JP-A-9-111786 (JP, A) JP-A-4-117704 (JP, U) (58) Fields investigated (Int. . ^7, DB name) E02D 29/12

Claims (4)

(57) [Claims] 1. A part of a flexible manhole joint 4 is fitted into a mounting hole 2 penetrated through a peripheral wall of a manhole 1 and is concentric with the manhole joint 4 along an inner peripheral surface of the manhole joint 4. A manhole joint mounting ring 20 that seals between the outer peripheral surface of the manhole joint 4 and the inner surface of the mounting hole 2 by expanding the manhole joint 4. An overlap area 26 formed integrally along its circumferential edge and sufficient to enable the locking of the two ends together with said expansion.
And a hoop portion 21 formed in an annular shape having:
The inner peripheral side terminal portion 27 of 21 and its vicinity are the flange portion 22.
While partially removing, the hoop portion 21 in the overlap region 26 is provided with a plurality of serrated claw portions 23 on the inner peripheral surface,
In the vicinity of the outer peripheral side terminal portion 28, a claw engaging portion 25 which can traverse the upper side of the claw portion 23 and lock the claw portion 23 is provided, and the inner and outer peripheral side terminal portions 27, 28 The mounting ring 2 for a manhole joint, comprising an extension leg receiving portion 24 at each of the flange portions 22 located outside the overlap region 26.
0. 2. The mounting ring 20 according to claim 1, wherein the claw portion 23 is formed by press forming. 3. The extension leg receiving portion 24 is provided with the flange portion 22.
2. The mounting ring 20 for a manhole joint according to claim 1, wherein the mounting ring is formed by bending. 4. The manhole joint according to claim 1, wherein the hoop portion 21 has a substantially U-shaped cross-sectional shape of the overlap region 26 and a region other than the vicinity thereof. Mounting ring 20.