JPH1113078A - Installation ring for pipe joint for manhole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an installation ring for a pipe joint for a manhole in which uniform extension force can be held along the whole circumference, and in which damage to external force such as an earthquake can be reduced by a double lock mechanism. SOLUTION: An installation ring 1 for a pipe joint for a manhole comprises a hoop part 2 integrally provided with a flange along both side end edge and formed roughly in a circular form having an overlap range 9 where both end parts can be locked after extension, plural sawteeth-like claw parts protruded on an inner circumferential surface of an inner end part 7 of the hoop part 2, and a support plate 6 having a claw lock part 11 with which the claw parts 4 can be locked to an outer end part 8 of the hoop part 2. The flange 3 provided with a leg receiving part 5 to receive an end part of an installation ring extension device 20 and a flanged slide plate 10 are provided on the outer end part 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in the structure of a fitting ring for a pipe joint, which provides a flexible pipe joint for connecting a manhole and a connecting pipe with a sufficient water sealing property.

[0002]

2. Description of the Related Art Conventionally, manholes scattered in a piping system for drainage or the like are damaged or leaked even when an external force is applied due to an earthquake or the like to a mounting hole in which the upstream and downstream pipes are penetrated through a concrete peripheral wall. It is connected via a flexible rubber pipe joint so as not to cause any problems. As shown in FIGS. 5 and 6, a conventional fitting ring 34 for a pipe joint has a fitting part 31 of a flexible rubber pipe fitted in a mounting hole 31 penetrated through a peripheral wall of a manhole 30. By extending concentrically with the pipe joint along the inner peripheral surface of the joint, sealing between the outer peripheral surface of the pipe joint 32 and the inner surface of the mounting hole 31 has been achieved.

On the other hand, the other end of the pipe joint 32 is tightened by another tightening ring 35 so that the outer peripheral surface thereof tightens the connection pipe 33 inserted into the inside of the pipe joint 32 so that a manhole is formed. The pipe connection to 30 was completed. FIG. 5 shows only the base member of the manhole 30 buried in the ground, and the skeleton of the manhole is assembled to the surface above the manhole 30.

[0004] The fitting ring 34 for the pipe joint is connected to the pipe joint 32.
When the pipe is concentrically expanded along the inner peripheral surface of the pipe joint, for example, the mounting ring expanding device 5 as shown in FIG.
0 is used. This mounting ring expansion device 50
Since the pressing portion 51 is provided on one side and the two extension rods 52 are provided on the other side, the pressing portion 51 is applied to the stability seat 38 provided on the inner diameter portion of the fitting ring 34 for a pipe joint. Rectangular projections 37, 37 formed on both sides of the cut portion 36 of the pipe joint mounting ring 34 and formed in parallel with the axial direction.
, A pair of extension rods 52, 52 are mounted with the legs open. Then, the mounting ring extending device 50 presses the clevis 55 by the turnbuckle 54 using the screw 53. Since the two extension rods 52, 52 are pin-coupled to the clevis 55 so as to be freely opened, the extension rods 52, 52 push the projections 37, 37 to expand the diameter of the fitting ring 34 for fittings. Can be.

[0005] Fig. 8 shows that the fitting ring 34 for a pipe joint is enlarged in diameter, and a locking claw 61 of a circumferential extension member 60 fixed to the other end of the cutting portion 36 is locked at the opposite end 39 of the cutting portion 36. It shows the state where it was turned on. The circumferential extension member 60 has one end 62 fixed to the outer circumference of the fitting joint mounting ring 34 by welding 63, the other end 64 extending along the outer diameter of the fitting joint mounting ring 34, and the other end 64 being closer to the other end 64. Locking pawl 6 on inner part
1 is formed. The locking claw is extended cutting portion 36
Abut on the opposing end 39 of the manhole 30 to hold the expanded circumference and press the flexible pipe joint 32 against the inner periphery of the manhole 30.

[0006]

However, the conventional pipe joint mounting ring 34 has a problem that water leaks from this portion due to insufficient expansion force of the circumferential joint member 60. Further, in the lock mechanism of the circumferential foot member 60, there is a problem that the diameter expansion state cannot be maintained when a sudden external force such as an earthquake acts.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, and to uniformly apply the expanding force of the mounting ring for the pipe joint of the manhole over the entire circumference and to apply sudden external force such as an earthquake. Another object of the present invention is to provide a manhole pipe joint mounting ring that can reduce damage to the lock mechanism.

[0008]

SUMMARY OF THE INVENTION The object of the present invention is to provide a flexible pipe joint having a part fitted in a mounting hole penetrated through a peripheral wall of a manhole. In a fitting ring of a pipe joint which is expanded and fixed concentrically with the joint, a flange portion extends on the inner peripheral surface along both side edges, and an overlap region where both ends are locked after the expansion. A hoop portion having a substantially annular shape, a plurality of sawtooth-shaped claws projecting on an inner peripheral surface of an inner end of the hoop portion in the overlap region, and the hoop portion in the overlap region. A supporting plate having a claw engaging portion provided so as to be capable of engaging the claw portion at an outer end portion thereof, and a slide plate with a flange having a flange portion at the outer end portion. Depending on the mounting ring of the fitting for manhole It is possible to attain.

In the mounting ring of the pipe joint for a manhole having the above-mentioned structure, a substantially annular hoop portion having an overlap region, and a plurality of serrated claw portions projecting from an inner end of the hoop portion are provided. And a support plate having a pawl engaging portion provided at an outer end of the hoop portion, and a slide plate with a flange at the outer end. Insufficiency of the expansion force at the part of the inner end portion from which the flange portion has been removed can be resolved, and uniform expansion force can be maintained over the entire circumference of the mounting ring.

[0010] The above object can be achieved by providing a through hole for a lock screw at the inner end on the tip side of the claw portion and a plurality of lock screw holes at the outer end. can do. In the mounting ring of the manhole fitting having the above-described configuration, the inner end and the outer end are locked by the claw portion and double-locked by the lock screw, so that the lock is performed even when a sudden external force due to an earthquake or the like is applied. Damage to the mechanism can be reduced, and water leakage from the outside can be more reliably prevented.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a mounting ring for a pipe joint for manholes according to the present invention will be described in detail with reference to FIGS. FIG. 1 is a partially enlarged side view showing a main part of a mounting ring of a pipe joint for manholes according to the present invention by a partial cross section.
FIG. 2 is a side view of the entire mounting ring of the pipe joint for manhole of the present invention, FIG. 3 is a partially enlarged plan view showing an inner peripheral side main part of the mounting ring of the pipe joint for manhole of the present invention, and FIG. 3
FIG.

[0012] The mounting ring 1 of the pipe joint according to the present embodiment includes:
As described with reference to FIG. 6, a part of the flexible rubber pipe joint 32 is fitted into the mounting hole 31 penetrated through the peripheral wall of the manhole 30, and is concentric with the pipe joint along the inner peripheral surface of the pipe joint. The outer peripheral surface of the pipe joint 32 and the mounting hole 31
The seal between the inner surfaces is achieved. Further, at the opposite end of the pipe joint 32, the outer peripheral surface is tightened by another tightening ring 35 so as to tighten the connection pipe 33 inserted into the inside of the pipe joint 32, and the pipe connection to the manhole 30 is completed.

As is apparent from FIGS. 1 to 4, the fitting ring 1 of the pipe joint has a flange 3 formed integrally along the side edges of the entire circumferential area on both sides thereof, and after the both ends are expanded. The inner end 7 of the hoop portion 2 formed in an annular shape and the vicinity thereof have an overlap region 9 that enables locking.
While the flange 3 is partially removed to facilitate the overlap with the outer peripheral end described later, the flange 1 is provided on both side edges.
6, 16 are provided, and claw portions 4 formed in a sawtooth shape with an inclined surface and a vertical surface on the inner peripheral surface thereof are serially provided at six positions at a predetermined pitch (8 mm pitch in the present embodiment). In addition, a through hole 14 for a lock screw 15 is provided.

The hoop portion 2 in the overlap region 9 has a claw engaging portion 11 formed at the outer end 8 thereof with a hole capable of engaging the claw portion 4 and a saw-toothed claw portion 4 that can slip through. It has a support plate 6 on which an inclined surface 12 is formed. In addition, the outer end portion 8 has a predetermined pitch (8 mm pitch in the present embodiment) at six locations so as to be able to cope with any of the plurality of claw portions 4 locked on the inner peripheral surface. A screw hole 13 is provided at a position in series. An extension rod 21 rotatably supported at one end of the mounting ring extension device 20.
And a flanged slide plate 10 having flanges 17 formed on both side edges.

As shown in FIGS. 3 and 4, the outer end 8 has a flange 1 of the support plate 6 inside the flanges 3, 3.
The flanges 6 and 16 and the flanges 17 and 17 of the slide plate 10 with flanges are fixed to the outside of the flanges 3 and 3 by crimping pins 18 so as to overlap inside and outside.

In the fitting ring 1 of the above-described pipe joint, the two extension rods 21 of the fitting ring extending device 20 are received in the leg receiving portions 5 formed on the flange 3 to operate the fitting ring extending device 20. The inner end 7 and the outer end 8 in the overlap region 9 are slid to the maximum in the expansion direction by being sufficiently expanded from the inside, so that the claw portion of the inner end 7 at the maximum expansion position is provided. 4 is locked by a claw locking portion 11 on the support plate 6 fixed to the outer end 8.
Further, while being locked at the maximum expansion position, it is inserted into a plurality of optimally positioned screw holes 13 provided in the outer end portion 8 through the through holes 14 formed in the distal end position of the inner end portion 7. Is locked by the lock screw 15.

In the mounting ring 1 of the pipe joint for a manhole according to the present embodiment, the flange 3 is extended on the inner peripheral surface along both side edges as described above, and the overlap is provided for locking both ends after expansion. A hoop portion 2 having a substantially annular shape having a region 9, and an inner end portion 7 of the hoop portion 2 in the overlap region 9.
And a plurality of sawtooth-shaped claws 4 protruding from the inner peripheral surface. Further, a support plate 6 having a claw locking portion 11 erected so as to be able to lock the claw portion 4 on the outer end portion 8 of the hoop portion 2 in the overlap region 9 and a flange 17 on the outer end portion 8 are provided. A slide plate 10 with a flange is provided. Therefore, the part of the inner end 7 from which the flange 3 is removed becomes stronger in expansion when expanded, eliminating insufficient expansion, maintaining uniform expansion force over the entire circumference, and reliably preventing water leakage from the outside. Can be.

Further, a lock screw through-hole 14 is provided at the inner end 7 on the tip end side of the claw portion 4 and a plurality of lock screw holes 13 are provided at the outer end 8. 7 and the outer end 8 can be locked by the claw 4 and double-locked by the lock screw 15. Therefore, even if a sudden external force due to an earthquake or the like is applied, damage to the lock mechanism can be reduced, and water leakage from the outside can be more reliably prevented.

[0019]

As described above, the mounting ring of the pipe joint for manhole according to the present invention has a flange portion extending on the inner peripheral surface along both side edges, and an overhang for locking both ends after expansion. A hoop portion formed in a substantially annular shape having a lap region, a plurality of serrated claw portions projecting from an inner peripheral surface of an inner end of the hoop portion in the overlap region, and a hoop portion in the overlap region. A support plate having a hook engaging portion provided so as to be capable of engaging a claw portion at an outer end portion, and a slide plate with a flange having a flange portion at the outer end portion are provided.

Therefore, in the expanded state of the mounting ring,
Insufficient expansion force at the part where the flange at the inner end of the mounting ring has been partially removed can be eliminated, and uniform expansion force can be maintained over the entire circumference of the mounting ring. It is possible to obtain a manhole fitting ring for a manhole.

Further, since a through hole for a lock screw is provided at an inner end on the tip side of the claw portion, and a plurality of lock screw holes are provided at an outer end, the inner end and the outer end are formed. Can be locked by the claw portion and double-locked by the lock screw. Therefore, even if a sudden external force due to an earthquake or the like is applied, damage to the lock mechanism can be reduced, and water leakage from the outside can be more reliably prevented. Therefore, it is possible to obtain a more reliable mounting ring for a pipe joint for a manhole.

[Brief description of the drawings]

FIG. 1 is an enlarged partial cross-sectional side view of a main part of a mounting ring of a pipe joint for manholes of the present invention.

FIG. 2 is an overall side view of FIG.

FIG. 3 is an enlarged plan view showing a main part on the inner peripheral side in FIG. 1;

FIG. 4 is a side view of a partial cross section in FIG.

FIG. 5 is a perspective view showing a relationship between a conventional manhole and a connection pipe.

FIG. 6 is a sectional view of a main part in FIG. 5;

FIG. 7 is an overall side view of a conventional mounting ring after expansion.

FIG. 8 is an enlarged partial side view of a main part in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mounting ring 2 Hoop part 3, 17 Flange 4 Claw part 5 Leg receiving part 6 Support plate 7 Inner end part 8 Outer end part 9 Overlap area 10 Slide plate with flange 11 Claw locking part 13 Screw hole 14 Through hole 15 Lock Screw 20 Mounting ring expansion device

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kazunori Hisaga 2-2-8, Mishino-cho, Nishi-ku, Hiroshima-shi, Hiroshima Nishikawa Rubber Industries Co., Ltd.

Claims (2)

[Claims] 1. A pipe which extends along the inner peripheral surface of a flexible pipe joint which is partially fitted into a mounting hole penetrated through a peripheral wall of a manhole and is concentrically expanded and fixed to the pipe joint. In the joint mounting ring (1), a flange (3) extends on the inner peripheral surface along both side edges and has a substantially annular shape having an overlap region (9) for locking both ends after the expansion. And a plurality of saw-like claw portions projecting from the inner peripheral surface of the inner end portion (7) of the hoop portion (2) of the overlap region (9). Four)
A support having a hook engaging portion (11) which is installed on the outer end (8) of the hoop portion (2) of the overlap region (9) so as to be able to hook the hook portion (4). A mounting ring for a pipe joint for manholes, comprising: a plate (6); and a slide plate (10) with a flange having a flange portion (17) at the outer end portion (8). 2. The inner end portion on the tip side of the claw portion (4).
The manhole according to claim 1, characterized in that a through hole (14) for a lock screw is provided in (7), and a plurality of lock screw holes (13) are provided in the outer end portion (8). Mounting ring for pipe fittings.