JPH07305367A - Locking ring od flexible tube fitting for manhole and device for mounting same - Google Patents

Abstract

PURPOSE:To enable a locking ring by which the flexible tube fitting of the connecting-pipe mounting portion of a manhole is secured in a hole of the manhole from its bore to be made greater in diameter easily and stably without exerting any abnormal force. CONSTITUTION:A cutting portion 2 that can be enlarged is provided on the circumference of a locking ring 1 and wedge supports 3, 3a having tapers 5 are attached to both sides of the cutting portion 2. The wedge supports 3 are pulled apart by a mounting device to enlarge the cutting portion 2, and this enlarged portion is linked by a circumference increasing member 11 to increase the outside diameter of the ring 1, and a flexible tube fitting is secured in a hole of a manhole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking ring for a flexible pipe joint for a sewer pipe manhole and a mounting device for the same.

[0002]

2. Description of the Related Art Connection pipes such as an inflow pipe and an outflow pipe are underground connected to a sewage manhole. Since the pipe is damaged due to the uneven settlement of the manhole body and the connecting pipe, the connecting portion between the manhole and the connecting pipe has flexibility. A flexible material such as rubber is generally used for such a connecting portion.
The shape and the manner of locking the manhole are various. For example, there are means such as bonding to the outside of the manhole body, or press fitting into the gap between the hole drilled in the body of the manhole and the outside diameter of the connecting pipe. Also, the flexible pipe joint is formed in a reducer shape, the narrow end of this reducer pipe joint is tightly fitted to the outer diameter of the connecting pipe, and the thick end is connected to the manhole. There is a means for loosely inserting the inner surface of the pipe mounting hole and crimping and fixing from the inside to the inner surface of this hole with a diameter-expanding ring to lock the flexible pipe joint in the manhole.

When such a flexible pipe joint is loosely inserted into the connection pipe mounting hole of the manhole and locked by a ring, as disclosed in Japanese Patent Laid-Open No. 51-10652, it is flexible. A part of the circumference of the ring for locking the pipe joint is bent toward the inner diameter side in a V-shaped concave shape, and after setting the ring at a predetermined position of the flexible pipe joint, the V-shaped concave portion is jacked. The flexible pipe joint was locked in the manhole hole by means of pressurizing the inside of the manhole from the inner side and pushing up the V-shape to inflate it outward.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the conventional method as disclosed in Japanese Patent No. 652, the pressure control of the jack must be precise. That is, generally, the pressure tends to increase. This may cause the rubber to crack. In addition, concrete may be destroyed if there is a hole at the end of the manhole body.

The present invention relates to a ring-shaped device which loosely inserts a flexible pipe joint into a connection pipe mounting hole of a manhole and then fixes and locks the insertion portion in the hole. An object of the present invention is to provide a locking ring for a flexible pipe joint for a manhole, which is an improvement of the technique disclosed in Japanese Patent Laid-Open No. 10652, and a mounting device therefor.

[0006]

The present invention takes the following technical means in order to solve the above problems. That is, in the locking ring of the present invention, the large-diameter end of the flexible pipe joint whose small-diameter end is externally fitted to the connecting pipe and whose large-diameter end is internally fitted to the inner diameter of the connecting-tube mounting hole of the manhole is connected to the connecting pipe of the manhole. A flat plate ring made of steel that is crimped to the inner surface of the mounting hole, and this ring is formed into a ring smaller than the circumference to be crimped, and an expandable cutting portion is provided on the circumference of the ring to enable expansion of the diameter. Locking a flexible pipe joint for a manhole, characterized in that a circumferential joint member is attached to the outer circumference of the ring straddling the cut portion, and means for expanding the diameter of the ring is attached to both sides of the cut portion on the inner circumference of the ring. It's a ring.

In this locking ring, it is preferable that one end of the circumferential joint member is fixed to the outer circumference of the ring, and the other end is formed with a locking claw that presses the opposite end of the expanded cut portion. After the ring is expanded, it can be easily fixed in the expanded state. Further, a plurality of the opposed ends of the locking ring may be provided in the circumferential direction, a plurality of locking claws may be provided in the circumferential direction, or both of them may be provided. This is suitable because the dimensions can be matched to the situation at the site.

As means for enlarging the diameter of the ring, Z-shaped wedge receivers are provided which face the inner diameters of the rings on both sides of the cut portion and taper in the axial direction of the ring.
As a device for expanding the diameter of the ring using this Z-shaped wedge receiver, the mounting device described below is used for mounting.
It is suitable. As the mounting device, a wedge-shaped expansion piece that engages with the taper of the Z-shaped wedge receiver and spreads the taper, a reaction force beam provided at the center with the advancing means of this expansion piece, and a reaction force beam of this reaction force beam. A mounting device for a flexible pipe joint for a manhole, which is composed of two reaction claws attached to both ends and locked to the side surface of the ring, is used. It is preferable to use a screw device as the expansion piece advancing means because it can be easily operated manually in the manhole.

The means for enlarging the diameter of the ring may be a protrusion having a rectangular cross section parallel to the ring axis direction, which is provided on the inner diameter of the ring on both sides of the cut portion. As a device for mounting the flexible pipe joint by expanding the diameter of this ring, a pair of expansion pieces for expanding the space of the protrusions of the rectangular cross section to expand the ring and the roots of the pair of expansion pieces are used. A flexible manhole that includes a clevis that is pin-coupled to each other and holds the expansion pieces so that they can be freely opened, a moving means that moves the clevis in the radial direction, and a stabilizing seat that receives the reaction force of the moving means on the pipe. An attachment device for a sex fitting can be used. The clevis moving means is preferably a turnbuckle because it facilitates work in a narrow manhole.

[0010]

The locking ring of the flexible pipe joint for a manhole of the present invention is a flat plate ring made of steel, and is attached by expanding its diameter. This ring is provided with a cut portion on the circumference of the ring so that the circumference can be expanded, and the cut portion is expanded to expand the diameter, and the expanded portion is connected by a circumferential joint member. This circumferential joint member has a structure capable of automatically adding the expanded portion when the diameter of the ring is expanded.

The circumferential joint member may be, for example, a member having one end fixed to the outer circumference of the ring and the other end having a locking claw for pressing the opposite end of the cut portion. In this case, it is possible to adjust the diameter expansion dimension of the locking ring by individually mounting a plurality of opposed ends in the circumferential direction in addition to the end of the cut portion or providing a plurality of locking claws in the circumferential direction. Can be

Various mechanisms and devices can be used as means for expanding the cutting portion and expanding the diameter of the ring. However, in order to easily carry out the work in the restricted work space inside the manhole at the site, It is appropriate to use a wedge force that spreads the taper provided opposite to both sides of the cut. For this reason, it is preferable to provide Z-shaped wedge receivers that are tapered in the ring axial direction across the cut portion. Then, both sides have the same taper as the facing taper of the Z-shaped wedge receiver, and the wedge-shaped expansion piece that spreads the taper and the expansion piece is inserted into the tapered portion of the Z-shaped wedge housing of the ring. Then, a manual attachment device for expanding the tapered portion by expanding the expansion piece to expand the ring is used. This attachment device requires a wedge-shaped expansion piece for expanding the taper and a reaction force device for advancing the expansion piece. A screw device such as a screw jack is used as the expansion piece advancing means. The screw device is preferable because it can manually generate a strong thrust within a narrow manhole without requiring a hydraulic device or the like.

As a means for expanding the diameter of the ring, instead of the Z-shaped wedge receiver, a rectangular cross section parallel to the ring axial direction is used.
It may be a pair of protrusions. As a device for expanding the diameter of this ring, a pair of expansion pieces for expanding the ring by expanding the distance between the pair of rectangular cross-section projections, and the pair of expansion pieces are pin-joined at their roots to open. A clevis that holds the leg freely, and a moving means that moves the clevis in the radial direction,
The diameter can be easily expanded by using a mounting device provided with a stabilizing seat that receives the reaction force of the moving means on the pipe.

[0014]

EXAMPLE FIG. 18 shows a manhole 10 to which the present invention is applied.
0 is a perspective view illustrating the relationship among the connection pipe 101 and the flexible pipe joint 102. The manhole 100 is buried in the ground, and FIG. 18 shows only the member at the base of the manhole 100. Above this, the manhole body is assembled to the ground surface. FIG. 19 is a partially enlarged view of the flexible pipe joint 102 of FIG. The flexible pipe joint 102 is made of a flexible material such as rubber, and has a reducer-like shape with one end having a small diameter and the other end having a large diameter. The end 103 on the small diameter side is tightly fitted onto the connection pipe 101, and the end 104 on the large diameter side is connected to the manhole 100 by a locking ring (not shown) mounted in the circumferential groove 105. It is crimped and fixed to the inner surface of the pipe mounting hole 106. FIG. 7 shows a vertical cross-sectional profile of an example of such a flexible pipe joint, and FIG. 6 is a front view seen from the large diameter side. Flexible pipe joint 1
No. 02 has a seal projection 107 formed on the inner diameter at the small-diameter end 103, and the projection 107 tightly fits the outer diameter of the connecting pipe 101. The circumferential groove 108 provided on the outer circumference is a seat such as a steel band for tightening the outer diameter of this portion. The end portion 104 on the large diameter side has a seal ridge 109 on the outer diameter. The seal ridge 109 is pressed against the inner surface of the manhole hole together with the packing 110 to form a seal.
A circumferential groove 105 is formed in the inner diameter of the large-diameter side end portion 104, and circumferential ridges 111 and 112 are provided at the edges thereof. The end portion 104 on the large diameter side is crimped and fixed to the inner surface of the connection pipe mounting hole 106 of the manhole 100 by a locking ring mounted in the circumferential groove 105. The notch 113 shown in FIG. 6 is provided for the work of locking the locking ring.

FIG. 1 is a partial view of a locking ring 1 of a flexible pipe joint for a manhole according to an embodiment of the present invention. 1A is a plan view seen from the inner surface side of the locking ring 1, and FIG. 1B is a side view. FIG. 2 is a side view seen from the same direction as FIG. 1B, but showing a state after the locking ring 1 is expanded in diameter. The locking ring 1 of the flexible pipe joint for a manhole of the embodiment is a flat plate ring made of steel for crimping the flexible pipe joint 102 to the inner surface of the connection pipe mounting hole 106 of the manhole. FIG. 1 shows a part of the circumference of the locking ring 1. The locking ring 1 is formed as a ring having a circumference smaller than the circumference to be crimped. As shown in FIG. 3, the cross-sectional shape of the ring 1 is formed in a U shape with a flange 1a to enhance the bending rigidity of the ring.

The locking ring 1 is provided with a circumferentially expandable cutting portion 2. When the cutting portion 2 is expanded, the locking ring 1 can be expanded in diameter. Z-shaped wedge receivers 3 and 3a are provided on the inner circumference of the ring 1 so as to straddle the cutting portion 2.
The Z-shaped wedge receivers 3 and 3a are formed on both sides of the cut portion 2 so as to face each other and form a taper, and are for expanding the diameter of the locking ring 1. The Z-shaped wedge receivers 3 and 3a are fixed to the inner diameter of the locking ring 1 by plug welding 4.
It has tapers 5 and 5a that face each other in the axial direction of the ring 1. FIG. 4 shows the Z-shaped wedge receiver 3a.
FIG. 4A is a plan view and FIG. 4B is a side view. When the Z-shaped wedge receivers 3 and 3a are expanded in the radial direction by using a mounting device to be described later, the cutting portion 2 expands, and FIG.
The state becomes as shown in.

An arcuate circumferential leg member 11 is attached to the outer peripheral side of the locking ring 1 so as to straddle the cutting portion 2 and extend over both sides thereof. This circumferential joint member 11 connects the ring 1 by bridging the expanded portion when the cut portion 2 is expanded and the diameter of the ring 1 is expanded, so that the expanded diameter state of the ring 1 is maintained and the flexible pipe joint is connected to the manhole. Crim the inner surface of the hole. The circumferential joint member 11 has one end 12 fixed to the outer periphery of the ring 1 by plug welding 13. The other end 15 extends along the outer diameter of the ring 1,
A locking claw 14 is formed on a portion near the other end 15. The locking claws 14 abut against the opposed ends of the expanded cutting portion 2 and press each other, hold the expanded circumference, and keep the flexible pipe joint pressed against the inner diameter of the manhole hole.

FIG. 5 is a development view showing the details of the circumferential joint member 11, FIG. 5 (a) is a plan view, FIG. 5 (b) is a side view, and FIG.
(C) is a front view. The one end 12 is provided with a hole 13a for plug welding, and the side surface of the locking claw 4 is provided with a reinforcement 16 to ensure the rigidity of the ring 1 at the expanded cutting portion 2. I am trying to do it. Next, the mounting device 30 of the embodiment of the present invention will be described with reference to FIGS. FIG. 8A is a plan view of the attachment device 30, FIG.
(B) is the side view.

Attachment device 30 for flexible pipe joint for manhole
Is an extension piece 31 and means 32 for advancing the extension piece 31.
The reaction force beam 33 and the reaction force claw 34 are main components. The expansion piece 31 has a wedge shape which engages with the tapers 5 and 5a of the Z-shaped wedge receivers 3 and 3a shown in FIG. FIG. 9 shows the extension piece 31-3
It is a front view, (a) is a rear view, (b) is a top view, (c) is a CC arrow view of (b). The extension piece 31 is the advancing means 3
A second mount 41 is provided at the rear end and has a tapered edge 42 on the side that forms a wedge. This edge is shown in Figure 9.
A groove 43 is provided as shown in FIG.
3 is a taper 5 and 5 of the Z-shaped wedge receivers 3 and 3a shown in FIG.
engage a. The advancing means 32 is a threaded rod screwed into a female screw at the center of the reaction beam 33, and is twisted by a handle 36 to move the expansion piece 31 forward and backward with respect to the reaction beam 33. The reaction force beam 33 has reaction force claws 34 attached to both ends thereof by pins 38. The tip of the reaction force claw 34 is
It has a hook 37.

The method of using this device is as follows.
FIG. 10 is an explanatory view showing a usage state of the mounting device 30,
(A) is a plan view, (b) is a side view showing a portion of the expansion piece 31, and (c) is a side view showing a portion of the reaction force claw 34. The ring 1 is set in the groove 105 of the flexible pipe joint 102 shown in FIG. 12, and the flexible pipe joint 102 is inserted into the connection pipe attachment hole 106 of the manhole 100. Figure 10 (c)
10, the reaction force claw 34 of the mounting device 30 is hooked on the flange 1a of the ring 1, and as shown in FIG.
The expansion piece 31 is engaged with the Z-shaped wedge bridge 3a. The handle 36 at the rear of the mounting device 30 is rotated to move the expansion piece 31 to the position shown in FIG.
When moving to the left toward (a), the reaction force beam 3
3 supports the reaction force of the expansion piece 31, and the expansion piece 31 moves the Z-shaped wedge receivers 3 and 3a in the direction to push them apart. The wedge receivers 3 and 3a are spaced from each other on both sides, and the locking ring 1 is provided with the cut portion 2.
The diameter is expanded from. At the position where the locking ring 1 is expanded to a predetermined size, as shown in FIG. 2, the locking claw 14 of the arcuate circumferential leg member 11 engages with the expanded end of the ring 1. After that, even if the expansion piece 31 of the attachment device 30 is retracted to loosen the wedge, the ring 1 does not return to the original diameter. In this embodiment, this expansion results in an outer diameter of 10 mm.
I made it bigger.

The ring 1 having the expanded cutting portion 2 press-fits and fixes the flexible pipe joint to the inner surface of the connection pipe mounting hole of the manhole to securely lock the flexible pipe joint. Next, a technique for expanding the diameter of the locking ring 1 using another mounting device 50 shown in FIG. 11 will be described. FIG. 14 is a plan view of an expanded portion showing a state of the locking ring 1 of another embodiment (a) before expansion and (b) after expansion.

As a means for expanding the diameter of the ring 1, the above Z
Instead of the wedge holder, protrusions 6 having a rectangular cross section parallel to the axial direction of the ring 1 are provided on both sides of the cut portion 2. FIG. 11 shows
It is explanatory drawing which shows the use condition of the ring attachment apparatus 50 which expands the diameter of this ring 1. A stable seat 55 for taking a reaction force of the attachment device 50 is provided on the inner diameter of the ring 1, and the pair of extension pieces 51, 51 are locked to the protrusions 6, 6 in an open state. The ring attachment device 50 pushes the clevis 52 with a turnbuckle 53 using screws 54. As shown in FIG. 13, two expansion pieces 51, 51 are pin-connected to the clevis 52 so that the expansion pieces 51, 51 can be freely opened. 1 can be expanded. FIG. 12 shows the state after the diameter expansion.

By appropriately designing the angle formed by the expansion pieces 51, 51 before and after the diameter expansion, the ring attachment device 50 can generate a very large expansion force against the pressing force of the turnbuckle. it can. Next, FIG.
An example in which the diameter expansion dimension of the locking ring 1 can be adjusted to 5, 16, and 17 will be described. FIG. 15 shows such a locking ring 1 before expansion. In this embodiment, a second facing end 62 projecting from the facing end 61 in the circumferential direction is attached to the facing end 61 of the cut portion 2 of the locking ring 1 in addition to the facing end 61. This second
The opposing end 62 of the cutting portion is formed so that the opposing end 61 of the cut portion is attached so as not to interfere with the engagement with the engaging piece 14, and is also capable of engaging with the engaging piece 14 itself. There is. This attachment is fixed by welding. Figure 1
6 shows a state where the diameter of the locking ring 1 is expanded and the opposed end 61 and the locking piece 14 of the circumferential joint member 11 are locked. If the pipe joint is sufficiently crimped in this state, mounting of the locking ring is completed. When the pressure bonding is insufficient, the diameter is further expanded, and as shown in FIG.
2 and the locking piece 14 are locked and the second stage is fixed. In the embodiment, the second stage is fixed such that the outer diameter of the locking ring is increased by 2 mm. If necessary, this expanded dimension can be multi-stepped. Further, in the above embodiment, the example in which the opposed ends are increased has been described, but a plurality of locking claws may be provided, or a plurality of both may be provided.

According to the embodiment shown in FIGS. 15 to 17, it is possible to adjust the expanded diameter dimension of the locking ring 1 according to the actual situation.

[0025]

Since the locking ring of the flexible pipe joint for manhole of the present invention is constructed as described above, it is possible to predetermine one or a plurality of diameter expansion dimensions in advance. There is no diameter expansion. Therefore, no abnormal force is applied to the rubber of the flexible pipe joint and the manhole body. Installation work can be easily done in factories and burial sites. The locking ring of the present invention is stably attached as is clear from its structure, but can be removed after setting. Therefore, if the opening position of the connection pipe mounting hole is incorrect, the flexible joint can be removed and reused.

[Brief description of drawings]

FIG. 1 is a partial view of a locking ring of a flexible pipe joint for a manhole according to an embodiment before a diameter of the locking ring is expanded.

FIG. 2 is a partial side view after expanding the diameter of the locking ring of the flexible pipe joint for a manhole of the embodiment.

FIG. 3 is a cross-sectional shape view of the locking ring of the flexible pipe joint for manhole of the embodiment.

FIG. 4 is an explanatory diagram of a Z-shaped wedge receiver.

FIG. 5 is an explanatory view of a circumferential joint member.

FIG. 6 is a front view of a flexible pipe joint.

FIG. 7 is a longitudinal cross-sectional profile of a flexible pipe fitting.

FIG. 8 is a plan view (a) and a side view (b) of the attachment device.

FIG. 9 is a three-sided view of the extension piece.

FIG. 10 is an explanatory diagram showing a usage state of the extension piece.

FIG. 11 is an explanatory diagram showing a usage state of another extension piece.

FIG. 12 is an explanatory diagram showing a usage state of the extension piece of FIG. 11.

13 is a partial perspective view of the extension piece of FIG. 11. FIG.

FIG. 14 is a front view of the locking ring of the embodiment before (a) expansion and (b) expansion.

FIG. 15 is a front view of the locking ring of another embodiment before expansion.

FIG. 16 is a front view of the locking ring of another embodiment after the first stage expansion.

FIG. 17 is a front view of the locking ring of another embodiment after the second stage expansion.

FIG. 18 is a perspective view showing a relationship between a manhole and a connecting pipe.

FIG. 19 is a partially enlarged view of the flexible pipe joint.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Locking ring 2 Cutting part 3 Wedge receiving 4 Plug welding 5 Taper 6 Protrusion 12 One end 11 Circumferential joint member 14 Locking claw 13 Plug welding 16 Reinforcement 15 The other end 31 Expansion piece 30 Mounting device 33 Reaction force beam 32 Advance means 36 Handle 34 Reaction Force Claw 38 Pin 37 Hook 43 Groove 41 Mounting Part 50 Mounting Device 51 Expansion Piece 52 Clevis 53 Turnbuckle 54 Screw 55 Stabilizing Seat 61 Opposing End 62 Second Opposing End 101 Connection Pipe 100 Manhole 103 End Part 102 Flexible Pipe fitting 105 Circumferential groove 104 End portion 107 Projection 106 Mounting hole 109 Projection 108 Circumferential groove

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuo Nakazato 751 Shinmaruko-cho, Nakahara-ku, Kawasaki-shi Nichicon Co., Ltd. (72) Inventor Takeo Tsukada 751 Shin-maruko-cho, Nakahara-ku, Kawasaki-shi Nichicon Co., Ltd.

Claims (9)

[Claims] 1. A large-diameter end of a flexible pipe joint in which a small-diameter end is externally fitted to a connecting pipe and a large-diameter end is internally fitted to an inner diameter of a connecting pipe mounting hole of a manhole is provided on an inner surface of the connecting pipe mounting hole of the manhole. It is a steel flat plate ring to be crimped, and the ring is formed into a ring smaller than the circumference to be crimped, and an expandable cutting portion is provided on the circumference of the ring so that the diameter can be expanded. A locking ring for a flexible pipe joint for a manhole, characterized in that a circumferential joint member is attached to the outer periphery of the ring across the ring, and means for expanding the diameter of the ring is attached to both sides of the cut portion on the inner periphery of the ring. 2. The manhole according to claim 1, wherein one end of the circumferential joint member is fixed to the outer periphery of the ring, and the other end of the circumferential joint member is formed with a locking claw that is pressed against the opposite end of the cut portion. Locking ring for flexible pipe joints. 3. The locking ring for a flexible pipe joint for a manhole according to claim 2, wherein a plurality of the opposite ends or the locking claws are provided. 4. The Z-shaped wedge receiver, wherein the means for enlarging the diameter of the ring is provided so as to face the inner diameters of the rings on both sides of the cut portion and has a taper in the axial direction of the ring. Locking ring for flexible pipe joints for manholes. 5. A wedge-shaped expansion piece that engages with the taper of the Z-shaped wedge receiver to spread the taper, a reaction beam having the expansion piece advancing means at the center, and both ends of the reaction beam. An attachment device for a flexible pipe joint for a manhole, comprising: two reaction claws that are attached and locked to the side surface of the ring. 6. The mounting device for a flexible pipe joint for a manhole according to claim 5, wherein the expansion piece advancing means is a screw device. 7. The manhole holder according to claim 1, wherein the means for enlarging the diameter of the ring is a protrusion having a rectangular cross section parallel to the ring axis direction, which is provided on the inner diameter of the ring on both sides of the cut portion. Locking ring for flexible pipe joints. 8. A pair of expansion pieces for locking the projections of the rectangular cross section according to claim 7 and expanding the space between the projections to expand the diameter of the ring, and pin-joining the bases of the pair of expansion pieces. For a manhole, comprising: a clevis that holds the expansion piece so that the extension piece can be freely opened, a moving means that moves the clevis in the radial direction, and a stabilizing seat that receives the reaction force of the moving means on the pipe. Attachment device for flexible pipe joints. 9. The attachment device for a flexible pipe joint for a manhole according to claim 8, wherein the moving means is a turnbuckle.