JPH10195901A - Mounting ring expansion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mounting ring expansion device which can surely correspond to variations in the dimensions of diameters of a mounting hole of manhole and pipe joint or variations in the same dimension in the fabrication and which can be easily mounted. SOLUTION: The mounting ring expansion device 30 includes a beam 31, a first and second legs 33, 34 which are swingably suspended from the beam 31 longitudinally along it through a first and second axes respectively, a slide screw thread 32 which extends from one end of the beam 31 toward the center of the second axis to allow the leg 34 to slide along a leg slide span SL, an expanded screw thread 35 which extends through between a first supporting axis of the leg 33 and a second supporting axis 43 of the leg 34 in parallel to the thread 32 to swing and expand the leg 34 along a leg swinging span SW, and a first and second engaging claws 33a, 34a provided at the lower ends of the legs 33, 34 respectively. Thus a wide mounting ring expansion span EX can be easily provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fitting ring expanding device for expanding a fitting ring for a pipe joint for providing 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 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.
They are connected via flexible rubber pipe joints to prevent water leakage. 4 and 5 show a conventional method for 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. 4 is a partially cutaway front view showing a state after mounting of the fitting ring 6 for a pipe joint for expanding an inner peripheral surface of the pipe joint.

In a conventional fitting ring 6 for fittings, a part of a flexible rubber fitting 4 is fitted into a fitting hole 2 penetrated through a peripheral wall of a manhole 1, and furthermore, an inner periphery of the fitting 4. By expanding concentrically with the pipe joint 4 along the surface, sealing between the outer peripheral surface of the pipe joint 4 and the inner surface of the mounting hole 2 has been achieved. On the other hand, the end of the pipe joint 4 on the side opposite to the manhole is tightened by another mounting ring 5 so that the outer peripheral surface thereof binds the connection pipe 3 inserted into the inside of the pipe joint 4. The connection was completed.

[0004] It is to be noted that the flange portion 8 is formed integrally along the circumferential end edge between the both ends of a substantially annular hoop portion 7.
a, 7b is a mounting ring extending device 11 in which a pair of legs 14a, 14b is screwed to each boss at both ends of a screw portion 12 having a nut 13 mounted substantially at the center, and the pair of legs 14a , 14b, each of which has a lower end recessed near the end portions 7a, 7b.
9a, 9b, and by rotating the nut 13, the pair of legs 14a, 14b move in opposite directions (the directions of the arrows), and a desired extension is provided between the two terminal portions 7a, 7b. An area is provided, and thereafter, a wedge piece 10 of a predetermined length is fitted into the expansion area to complete the fixing operation.

[0005]

However, the conventional mounting ring 6 for a pipe joint, and in particular, the mounting ring extending device 11 can be used only by sliding the pair of legs 14a, 14b. Since the space between the threaded portions 7b is expanded, the expansion function is determined by the effective length of the threaded portion 12, so that the drawback that the applicable range for the pipe fitting 4 having various bore sizes is narrow has not been solved.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, and reliably copes with manufacturing variations of the manhole mounting holes and various sizes of the pipe joint or the same dimensions, and facilitates the mounting operation. It is an object of the present invention to provide a mounting ring extension device for 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 pipe fitting is inserted into a mounting hole provided in a peripheral wall of a manhole, and a fitting ring for the pipe joint is expanded concentrically with the pipe joint along the inner peripheral surface of the pipe joint. A mounting ring extending device for sealing between the outer peripheral surface of the pipe joint and the inner surface of the mounting hole, wherein the mounting ring extending device includes a beam portion, a first pivot along a longitudinal direction of the beam portion. A first leg and a second leg, each of which is swingably suspended via a second pivot, from one end of the beam toward the axis of the second pivot along the longitudinal direction of the beam. A sliding screw portion extending to slide the second leg along the leg sliding span, and passing between a first support shaft of the first leg and a second support shaft of the second leg, the slide screw; Extending in parallel with the leg and swinging and expanding the second leg along the leg swinging span. Zhang threaded portion, and wherein each of the first and second
This is achieved by a mounting ring expansion device comprising first and second locking pawls disposed at each lower end of the leg.

A further object of the present invention is to fit a part of a flexible pipe joint into a mounting hole penetrated through a peripheral wall of a manhole, and to fit the pipe joint along an inner peripheral surface of the pipe joint. By expanding the fitting ring for fittings concentrically with
A mounting ring expansion device for sealing between an outer peripheral surface of the pipe joint and an inner surface of the mounting hole, wherein the mounting ring for the pipe joint integrally forms a flange portion along a circumferential edge thereof. Further comprising a hoop portion formed in an annular shape having a hoop portion overlap region sufficient to enable the locking of both terminal portions with the expansion, and further comprising the hoop portion in the hoop portion overlap region. While the outer peripheral side terminal portion and the vicinity thereof partially removes the flange portion,
A claw receiving portion on an inner peripheral surface thereof; and further, the hoop portion in the hoop portion overlapping region includes a claw receiving portion near an inner peripheral side terminal portion, and the mounting ring expanding device A beam portion, a first leg portion and a second leg portion swingably suspended along a first pivot axis and a second pivot axis along the longitudinal direction of the beam portion, respectively, along the longitudinal direction of the beam portion. A sliding screw extending from one end of the beam toward the axis of the second pivot to slide the second leg along the leg sliding span; a first support shaft of the first leg; An extension screw portion extending between the second support shafts of the second leg portion and extending in parallel with the sliding screw portion to swing-expand the second leg portion along the leg swinging span; A first and a second locking claw disposed at each lower end of the first and second legs. It is achieved by that the mounting ring expansion device.

[0009] Further, it is an object of the present invention that the pipe joint mounting ring is formed by inserting a wedge piece into a mounting ring expansion span that is set between the inner and outer peripheral ends by the mounting ring expansion device. This is achieved by a mounting ring expansion device characterized by being formed in the body.

In the mounting ring extending apparatus of the present invention, a part of a flexible pipe fitting is fitted into a mounting hole penetrated through a peripheral wall of a manhole, and the pipe fitting extends along an inner peripheral surface of the pipe fitting. A mounting ring expansion device that expands the pipe joint mounting ring concentrically to seal the outer peripheral surface of the pipe joint and the inner surface of the mounting hole, wherein the mounting ring expansion device includes a beam portion. A first leg and a second leg which are swingably suspended via a first pivot and a second pivot, respectively, along the longitudinal direction of the beam, and the beam which extends along the longitudinal direction of the beam. A sliding screw portion extending from one end toward the axis of the second pivot to slide the second leg along the leg sliding span, a first support shaft of the first leg and the second leg; A second leg extending between the second support shafts of the section and parallel to the sliding screw section; An expansion screw portion for swinging and expanding along the leg swinging span is provided, and first and second locking claws provided at each lower end of each of the first and second legs. A wide range of attachment ring expansion spans can be easily obtained by a combined operation of the sliding operation of the sliding screw portion and the expansion operation of the expansion screw portion with respect to the fitting ring for fitting.

[0011] Furthermore, the mounting ring extending device of the present invention includes:
A part of a flexible pipe fitting is inserted into a mounting hole provided in a peripheral wall of a manhole, and a fitting ring for the pipe joint is expanded concentrically with the pipe joint along the inner peripheral surface of the pipe joint. Thereby, a mounting ring expansion device for sealing the outer peripheral surface of the pipe joint and the inner surface of the mounting hole, wherein the mounting ring for the pipe joint integrally forms a flange portion along a circumferential edge thereof. And further comprising a hoop portion formed in an annular shape having a hoop portion overlap region sufficient to enable locking of the both end portions with the expansion, and further comprising a hoop portion overlap region. The outer peripheral side terminal portion of the hoop portion and the vicinity thereof, while partially removing the flange portion, include a claw receiving portion on the inner peripheral surface thereof, and further, the hoop portion in the hoop portion overlap region,
A claw receiving portion is provided near the inner peripheral end portion, and the mounting ring extending device is swingable via a beam portion, a first pivot and a second pivot along the longitudinal direction of the beam, respectively. A first leg portion and a second leg portion suspended along a longitudinal direction of the beam portion, extending from one end of the beam portion toward the axis of the second pivot, and extending the second leg portion to the leg. A sliding screw portion that slides along the partial sliding span, a portion extending between the first supporting shaft of the first leg portion and the second supporting shaft of the second leg portion, and extending in parallel with the sliding screw portion. An extension screw portion for swinging and expanding the leg portion along the leg swinging span is provided, and first and second locking claws provided at each lower end of each of the first and second legs. Therefore, by combining the sliding operation by the sliding screw portion and the expanding operation by the expanding screw portion, it is possible to have various apertures before It can cope with a very easy and wide mounting ring expansion Spahn to the mounting ring for a pipe joint.

[0012] Furthermore, the mounting ring extending device of the present invention includes:
The fitting ring for fittings is formed in an annular shape by inserting a wedge piece into a fitting ring expansion span set between the inner and outer peripheral terminals by the fitting ring expanding device. Expansion return is reliably prevented.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the mounting ring expanding device of the present invention will be described in detail below with reference to the accompanying drawings. Note that members common to the above-described conventional fitting 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 fitting ring 20 for a pipe joint according to the present invention has been partially broken and attached, FIG. 2 is an enlarged front view of the fitting ring extending device of FIG. 1, and FIG. FIG. 4 is a cross-sectional view taken along the line AA of FIG.

The fitting ring 20 for the fitting which is the object of the fitting ring extending device 30 of the present invention is also provided in the fitting hole 2 formed in the peripheral wall of the manhole 1 in the same manner as the above-mentioned fitting ring 6 for the conventional fitting. By fitting a part of the pipe joint 4 having flexibility and expanding concentrically with the pipe joint 4 along the inner peripheral surface of the pipe joint 4, the outer peripheral surface of the pipe joint 4 and the mounting hole 2 are formed. The sealing between the inner surfaces is attempted. Further, the fitting ring 20 for a pipe joint has a flange portion 22 integrally formed along a circumferential edge thereof, and further has a hoop portion sufficient to enable locking of both ends thereof with the expansion. A hoop portion 21 formed in an annular shape having a wrap region OL, and furthermore, an outer peripheral side terminal portion 21b of the hoop portion 21 in the hoop portion overlap region OL and the vicinity thereof partially form the flange portion 22. While removing, the claw receiving portion 23
b, and further, the hoop portion overlap area OL
The hoop portion 21 in the above is provided with a claw receiving portion 23a near the inner peripheral side terminal portion 21a.

On the other hand, the mounting ring extending device 30 includes a beam portion 31 and a first leg slidably suspended along a longitudinal direction of the beam portion 31 via a first pivot 40 and a second pivot 41, respectively. The portion 33 and the second leg portion 34 extend along the longitudinal direction of the beam portion 31 from one end of the beam portion 31 toward the axis of the second pivot 41 to slide the second leg portion 34 over the leg portion. A sliding screw portion 32 that slides along the spurn SL, and a first support shaft of the first leg portion 33
An extension extending between the second support shaft 43 of the second leg 34 and the second support shaft 43 in parallel with the sliding screw portion 32 to swing and expand the second leg 34 along the leg swing span SW. It comprises a screw portion 35 and first and second locking claws 33a, 34a disposed at lower ends of the first and second legs 33, 34, respectively.

The first leg 33 is provided with the beam 31
However, since the sliding screw portion 32 does not reach the boss portion 44 which is swingably supported via the first pivot 40 and is integrated with the first pivot 40, the mechanical strength is reduced. If there is room, the boss 44 can be omitted. Further, the expansion screw portion
The boss 47 of the first leg 33 through which the 35 penetrates, like the boss 46 disposed at one end of the beam 31 through which the sliding screw 32 penetrates, is not provided with a female screw. The structure is such that a stopper member is added to simply allow the sliding screw portion 32 to rotate.

On the other hand, the second leg 34 is connected to the beam 31
On the other hand, a female screw screwed with the sliding screw portion 32 is engraved on the boss portion 45 which is swingably supported via the second pivot 41 and is integrated with the second pivot 41. Because
When the sliding screw portion 32 is rotated substantially in synchronization with the extension screw portion 35, the stem portion of the second pivot 41 that penetrates through the slits 49 provided in the front and rear surfaces of the beam portion 31 in a loosely fitted state. The second leg 34 slides along the leg slide span SL. Further, the second leg portion 34 is provided with a boss portion 48 integrated with the second support shaft 43 with the extension screw portion 35.
When the expansion screw portion 35 is rotated substantially in synchronization with the sliding screw portion 32, the female screw is swung and extended along the leg swing span SW.

With respect to the pipe joint mounting ring 20 before expansion, in which the mounting ring expansion spanning EX is almost occupied by the hoop overlapping area OL,
The first and second locking claw portions 33a, 33a are attached to the respective claw receiving portions 23a, 23b.
34a, and the sliding screw portion 32 is rotated while substantially synchronizing the extension screw portion 35 in accordance with a desired leg extension spanning EX, and the second leg portion 34 is moved to the maximum leg sliding span _SLmax.
And after obtaining the predetermined leg extension spanning EX by expanding within the range of the maximum leg swing spanning SW _MAX , a wedge piece 36 prepared in advance is inserted between the leg extension spanning EX to connect the pipe joint. The extension return of the mounting ring 20 is prevented, and the fixing operation is completed.

[0019]

The mounting ring extending device 30 of the present invention described above has the following novel effects. That is, the mounting ring extending device 30 of the present invention fits a part of the flexible pipe joint 4 into the mounting hole 2 penetrated through the peripheral wall of the manhole 1,
The fitting ring 20 for confining the fitting between the outer peripheral surface of the fitting 4 and the inner surface of the fitting hole 2 by extending the fitting ring 20 for the fitting in a concentric manner with the fitting 4 along the inner circumferential surface of the fitting. An expansion device 30, wherein the mounting ring expansion device
30 is the beam portion 31, the first leg portion 33 and the second leg portion which are swingably suspended along the longitudinal direction of the beam portion 31 via the first pivot 40 and the second pivot 41, respectively. 34, extending along the longitudinal direction of the beam portion 31 from one end of the beam portion 31 toward the axis of the second pivot 34, while moving the second leg 34 along the leg sliding spanning SL. The sliding screw portion 32 to be slid, the first support shaft 42 of the first leg portion 33, and the second leg portion
An extension screw portion 35 extending between the second support shafts 43 and parallel to the sliding screw portion 32 to swing-expand the second leg portion 34 along the leg portion swing span SW; Each of the first
And the first and second locking claws 33a, 34a provided at the lower ends of the second and third legs 33, 34, respectively. The combined operation of the sliding operation by the extension 32 and the extension operation by the extension screw portion 35 makes it possible to easily obtain a wide range of the attachment ring extension spanning EX.

Further, the mounting ring extension device 30 of the present invention
Is the mounting hole 2 penetrated through the peripheral wall of the manhole 1.
By fitting a part of the pipe joint 4 having flexibility into the inside and expanding the fitting ring 20 for the pipe joint concentrically with the pipe joint 4 along the inner peripheral surface of the pipe joint 4, The attachment ring extending device 30 for sealing between the outer peripheral surface of the pipe joint 4 and the inner surface of the mounting hole 2, wherein the pipe joint mounting ring 20 extends the flange portion 22 along the circumferential edge thereof. The hoop portion 21 is formed integrally and further has an annular shape with the hoop portion overlap region OL sufficient to enable the locking of the two terminal portions with the expansion. The outer peripheral side terminal portion 21b of the hoop portion 21 and the vicinity thereof in the hoop portion overlap region OL partially remove the flange portion 22, while the claw receiving portion 23b is provided on the inner peripheral surface thereof. The hoop in the hoop portion overlap area OL The portion 21 includes the claw receiving portion 23a near the inner peripheral end portion 21a, and the mounting ring extending device 30 includes the beam portion 31, the beam portion
The first leg 33 and the second leg 33, which are swingably suspended through the first pivot 40 and the second pivot 41, respectively, along the longitudinal direction of 31.
The leg 34 extends along the longitudinal direction of the beam 31.
Of the sliding screw portion 32 and the first leg portion 33 extending toward the axis of the second pivot 34 to slide the second leg portion 34 along the leg portion sliding span SL. 1st spindle
It extends between the second support shaft 43 of the second leg portion 34 and the second support shaft 43 in parallel with the sliding screw portion 32 to swing and expand the second leg portion 34 along the leg swing span SW. The expansion screw part
35, and the first and second locking claws 33a, 34a disposed at the lower ends of the first and second legs 33, 34, respectively. The combined operation of the sliding operation and the expansion operation by the expansion screw portion 35 makes it possible to cope with the pipe joint mounting ring 20 having various diameters very easily and with the widespread mounting ring expansion span EX.

Further, the mounting ring extending device 30 of the present invention
The wedge piece is inserted into the mounting ring expansion spanning EX set between the inner and outer peripheral side terminals 21a and 21b by the mounting ring expansion device 30.
Since the annular member is formed by inserting 36, it is possible to reliably prevent the expansion return of the fitting ring 20 for a pipe joint.

[Brief description of the drawings]

FIG. 1 is a front view showing a state in which a part of a fitting ring for a pipe joint according to the present invention has been partially broken and attached.

FIG. 2 is an enlarged front view of the mounting ring expanding device of FIG. 1;

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

FIG. 4 is a cross-sectional view of a main part of a conventional manhole and connection pipe in a state where connection between the manhole and connection pipe has been completed.

FIG. 5 is a front view, partially broken away, showing a state after mounting of a conventional fitting ring for fitting for expanding the inner peripheral surface of a flexible fitting.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Manhole 2 Mounting hole 3 Connection pipe 4 Fitting 5 Separate mounting ring 6 Conventional mounting ring for fitting 7 Hoop section 7a, 7b Terminal section 8 Flange section 9a, 9b Leg support section 10 Wedge piece 11 Conventional mounting ring expansion Device 12 Thread 13 Nut 14a, 14b Leg 20 Mounting ring for pipe joint 21 of the present invention 21 Hoop 21a Inner terminal 21b Outer terminal 22 Flange 23a Claw receiving portion 23b Claw receiving portion 30 Mounting ring extending device of the present invention 31 Beam 32 Sliding screw 33 First leg 33a First locking claw 34 Second leg 34a Second locking claw 35 Extended screw 36 Wedge piece 40 First pivot 41 Second pivot 42 First support Axis 43 2nd spindle 44-48 Boss 49 Slit SL Leg sliding span SW Leg swinging span EX Mounting ring expansion span OL Hoop overlapping area

Claims (3)

[Claims] 1. A part of a flexible pipe joint 4 is fitted into a mounting hole 2 penetrated through a peripheral wall of a manhole 1, and is concentric with the pipe joint 4 along the inner peripheral surface of the pipe joint 4. A mounting ring expansion device 30 for sealing the outer peripheral surface of the pipe joint 4 and the inner surface of the mounting hole 2 by expanding the mounting ring 20 for a pipe joint in a manner as described above. , A beam portion 31, a first leg portion 33 and a second leg portion 3 slidably suspended along a longitudinal direction of the beam portion 31 via a first pivot 40 and a second pivot 41, respectively.
4. The second leg 34 is slid along the leg sliding span SL by extending from one end of the beam 31 toward the axis of the second pivot 41 along the longitudinal direction of the beam 31. The second leg portion extends between the sliding screw portion 32, the first support shaft 42 of the first leg portion 33, and the second support shaft 43 of the second leg portion 34 in parallel with the sliding screw portion 32. An extension screw portion 35 for swinging and expanding the extension 34 along the leg swing span SW, and first and second locking claws disposed at the lower ends of the first and second legs 33 and 34, respectively. Mounting ring expansion device 30 comprising parts 33a, 34a. 2. A part of a flexible pipe joint 4 is fitted into a mounting hole 2 penetrated through a peripheral wall of a manhole 1 and is concentric with the pipe joint 4 along the inner peripheral surface of the pipe joint 4. A mounting ring extending device 30 for sealing the outer peripheral surface of the pipe joint 4 and the inner surface of the mounting hole 2 by expanding the mounting ring 20 for a pipe joint in a manner as described above. However, the flange portion 22 is integrally formed along the circumferential end edge thereof, and further has a hoop portion overlap region OL sufficient to enable locking of the both ends at the time of the expansion. The hoop portion 21 formed, further, the outer peripheral side terminal portion 21b of the hoop portion 21 in the hoop portion overlap region OL and the vicinity thereof,
While the flange portion 22 is partially removed, a claw receiving portion 23b is provided on the inner peripheral surface thereof, and further, the hoop portion 21 in the hoop portion overlap region OL has an inner peripheral side terminal portion.
A nail receiving portion 23a is provided in the vicinity of the beam receiving portion 21a, and the mounting ring extending device 30 swings along a beam portion 31, a first pivot 40 and a second pivot 41 along the longitudinal direction of the beam portion 31, respectively. First leg 33 and second leg 3 suspended freely
4. The second leg 34 is slid along the leg sliding span SL by extending from one end of the beam 31 toward the axis of the second pivot 41 along the longitudinal direction of the beam 31. The second leg portion extends between the sliding screw portion 32, the first support shaft 42 of the first leg portion 33, and the second support shaft 43 of the second leg portion 34 in parallel with the sliding screw portion 32. An extension screw portion 35 for swinging and expanding the extension 34 along the leg swing span SW, and first and second locking claws disposed at the lower ends of the first and second legs 33 and 34, respectively. Mounting ring expansion device 30 comprising parts 33a, 34a. 3. The fitting ring 20 for the pipe joint is attached to the inner and outer peripheral end portions 21a,
The mounting ring extending device (30) according to claim 1 or 2, wherein a wedge piece (36) is inserted into the mounting ring expanding span (EX) set between 21b to form an annular body.