JP2997204B2 - Watertight structure, extension band and extension jig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible joint, and particularly to a manhole suitable for use in a joint between a concrete manhole (hereinafter abbreviated as a manhole) and a sewer pipe (hereinafter abbreviated as a pipe). The present invention relates to a water stoppable flexible joint and a method of constructing the same.

[0002]

2. Description of the Related Art Conventionally, in order to connect a manhole to a pipe, a hole larger than the outer diameter of the pipe to be used is previously drilled in the outer wall of the manhole. The gap between the manhole and the pipe was eliminated. However, in the method of pouring mortar or concrete, there is a problem that the joint is not flexible, the pipe may be broken due to uneven settlement, and water may be leaked, and a repair cost is required. In addition, backfill cannot be performed until the mortar or concrete is hardened, and when concrete is driven in, there is also a problem that a work requiring skill such as a formwork assembling work has to be performed.

As a watertight joint for manholes which solves these problems, the present applicant has disclosed in Japanese Utility Model Publication No. 4-29190 a pipe (not shown) as shown in FIGS. 14 (a) and 14 (b). Cylindrical part 7 inserted coaxially through the end
2, a manhole watertight joint 71 comprising: a protrusion 73 projecting in two axial directions at one end of a cylindrical portion 72; and an edge 74 attached to the cylindrical portion 72 in a radial direction in a brim shape. ing.

As shown in FIG. 15, a watertight joint 71 for manholes disclosed in Japanese Utility Model Publication No. 4-29190 described above has a hole 81 formed in an outer wall 81b of the manhole 81.
In the state where the protruding portion 73 is inserted into the inside a, the edge portion 74 and the outer wall 81b of the manhole 81 are fixed with the adhesive 82, and the cylindrical portion 72 and the tube 83 are fixed with the adhesive layer 84 and the fastening band 85. I do. Thereafter, the pipe 83 is connected to the manhole 81 by providing a mortar 86 or the like between the protrusion 73 and the hole 81a. Thereby, the manhole 8
It is possible to obtain a good water stopping effect at the connection between the pipe 1 and the pipe 83.

[0005]

In the watertight joint for manholes having the above-described structure, an adhesive 82 such as butyl rubber is used for joining the edge portion 74 to the outer wall surface of the manhole, and the adhesive is also applied to the outer wall surface of the manhole. A layer was formed, and an edge 74 provided with an adhesive 82 was stuck on the adhesive layer.

However, the joints to be constructed in the present invention are located in the ground formed by excavation of the ground, and have a high humidity. There was a problem that the pasting work became difficult. In this case, unless the moisture on the outer wall surface is dried by a flame of a burner or the like, an adhesive cannot be applied to form an adhesive layer, which is troublesome. In addition, it is necessary to leave the adhesive for 2 to 5 minutes before applying the adhesive on the outer wall surface of the manhole and drying the solvent.
If moisture adheres to the pressure-sensitive adhesive layer during this standing time, there is a problem that poor adhesion of the edge portion 74 occurs and causes water leakage.

An object of the present invention is to solve the above-mentioned problems,
An object of the present invention is to provide a watertight structure which can follow a displacement thereof even when the pipe is largely bent and maintain good water-tightness, and which is easy to construct, an expansion band and an expansion jig for obtaining such a watertight structure.

[0008]

SUMMARY OF THE INVENTION The present invention is a watertight structure including a manhole, a pipe, and a flexible joint for a manhole applied to a joint portion between the manhole and the pipe, wherein the flexible structure for the manhole is provided. The joint has at least a cylindrical portion that is coaxially inserted into the end of the tube, and a protruding portion that protrudes in the axial direction at one end of the cylindrical portion, and the protruding portion is recessed at a boundary with the cylindrical portion. Is formed, the outer surface of the protruding portion in contact with the manhole is flat, a water-blocking pressure-sensitive adhesive layer is provided on the outer surface, and an extended band is provided in the concave portion, The expansion band pushes the recess from the inside, and the water-blocking pressure-sensitive adhesive layer is plastically deformed between a drilled hole formed in an outer wall of the manhole and the outer surface of the protruding portion. The aqueous pressure-sensitive adhesive layer is It is crimped to, those relating to watertight.

[0009] The present invention is also an expansion band used for expanding a manhole flexible joint and crimping the manhole flexible joint to a drilled hole of a manhole.
A stop stopper for fixing is provided at one end of the cut surface of the extension band, a guide rail is provided at the other end of the extension band, and a stopper is provided between the stopper stop and the guide rail. The extended band can be fixed in an extended state by being extended. Further, the present invention provides a method for expanding a manhole flexible joint and offsetting a side of the extension band to extend an extension band used to crimp the manhole flexible joint into a manhole drilled hole. An expansion jig detachably mounted at a position, wherein the expansion jig is a protrusion mounted on both sides of the expansion band, and a bolt fixed vertically to one of the protrusions. A trapezoidal slide plate that is provided at each of the protrusions and that spreads away from the protrusions, a trapezoidal expansion plate that is provided between the slide plates, and that is fitted with the bolt, and a position of the expansion plate. The adjusting plate is constituted by a nut engaged with the bolt, and by rotating the nut, the expansion plate is pushed downward, and each of the slide plates is formed of the expansion plate. Has a mechanism for spreading pressed by descending, those involved in the extended jig. Also, the present invention extends the manhole flexible joint to offset the side of the extension band to extend the extension band used to crimp the manhole flexible joint into the drilled hole of the manhole. An extension jig removably attached to a position, wherein the extension band is provided with a pair of extension jig insertion ports, and the extension jig includes a jig body and the pair of extension jigs. It has a pair of claw parts that can be attached to the mouth, and a drive unit that drives the pair of claw parts to expand, and the pair of claw parts are rotatably provided on the jig body. The present invention relates to an extension jig provided at each of the distal ends of a pair of arm portions and capable of expanding the extension band by rotating the pair of claw portions.

[0010]

In the above construction, the concave portion provided in the protruding portion can absorb the displacement even if the tube is largely bent. In addition, by providing an extension band in the recess and pressing the extension against the drilled hole of the manhole by expanding the extension band, it is possible to achieve good water stopping performance. Furthermore, when the flexible joint has an edge which is attached in the radial direction of the cylindrical portion in a brim shape, positioning at the time of attaching the joint body is easy to perform, and insufficient insertion, excessive insertion, oblique attachment of the protruding portion at the time of construction. Mistakes can be eliminated. Furthermore, by sticking the edge to the outer wall surface of the manhole with a water-blocking adhesive, displacement of the joint body with respect to earth pressure and water pressure hardly occurs. By taking a double structure of the aqueous pressure-sensitive adhesive layer, higher water-stopping properties can be maintained.

In the watertight structure of the present invention, the watertight flexible joint for manholes having the above-described structure is used, and the space between the pipe and the cylindrical portion and the space between the manhole and the outer peripheral cylindrical portion are pressed and fixed with an adhesive. Since it has a watertight structure, it can be easily constructed without using any mortar or the like. Therefore, there is no need for skilled work such as formwork assembly work,
Further, there is no need to wait for backfilling until the mortar or concrete is hardened, and the work can be performed in a short time of about 5 minutes, and the backfill work can be performed continuously after the work.

[0012]

FIG. 1 is a view showing the structure of an example of a watertight flexible joint for manholes. In the example shown in FIG. 1, the watertight flexible joint 1 for a manhole includes a cylindrical portion 2 for holding an end of a pipe (not shown), and a projecting portion 3 provided at one end of the cylindrical portion 2 and projecting in an axial direction. And a rim 4 attached to the cylindrical portion 2 in a radial direction in a brim shape. At the boundary between the cylindrical portion 2 and the edge 4 of the protruding portion 3, a concave portion 5 opening toward the cylindrical portion 2 is provided. An extension band 6 is inserted and provided at an end of the recess 5 connected to the edge 4. An extension jig 7 for extending the extension band 6 in the recess 5 is provided at a position offset from the extension band 6 on the side of the extension band 6 in this example. Also, although not visible in FIG. 1,
As in the conventional case, a water-blocking pressure-sensitive adhesive layer 8 is provided on the surface that comes into contact with the manhole when the edge 4 is constructed. Furthermore, an adhesive layer 9 is provided on the inner surface of the end of the cylindrical portion 2 that holds the tube, and a fastening band 10 is provided at a position corresponding to the adhesive layer 9 on the outer surface of the end of the cylindrical portion 2.

FIG. 2 is a diagram for explaining an example of a method for constructing a flexible joint for manholes. In FIG. 2, first, the projecting portion 3 of the watertight flexible joint 1 for manhole shown in FIG. 1 is set to a predetermined position in the hole 12 of the manhole 11 with the extension band 6 set in the predetermined position of the concave portion 5. insert. Then, the edge 4 is adhered to the outer wall surface of the manhole 11 by the water-blocking pressure-sensitive adhesive layer 8 and the extension band 6
The watertight flexible joint 1 is mounted in the drilled hole 12 of the manhole 11 by pressing and spreading the end of the protruding portion into the drilled hole 12 using the expansion jig 7. Then the tube 13
Is inserted into the cylindrical portion 2, and the pressure-sensitive adhesive layer 9 of the cylindrical portion 2 is tightened from the outside with a fastening band 10 and fixed by pressure to complete the construction of the watertight flexible joint 1 for a manhole of the present invention. In addition, 14 is a makeup mortar provided as needed.

FIG. 3 is a diagram showing a configuration of an example of the extension band 6 of the present invention. FIG. 4 is an enlarged view showing a configuration of an extension jig 7 provided on the extension band 6 shown in FIG. 3 and 4, the extension jig 7 provided on the extension band 6 includes:
It has the following configuration. That is, the projecting portions 21-1 and 21-2 are provided integrally with both ends of the extension band 6 and offset from the extension band 6. A bolt 22 is vertically fixed to the one protrusion 21-1 so as not to hinder the movement of the protrusion 21-2. In addition, the protruding portions 2 are provided in the protruding portions 21-1 and 21-2.
Trapezoidal slide plates 23-1 and 23-2 are provided, which spread as the distance from 1-1 and 21-2 increases. Slide plate 2
A trapezoidal expansion plate 24 meshing with the bolt 22 and a nut 25 meshing with the bolt 22 for adjusting the position of the expansion plate 24 are provided between 3-1 and 23-2.

Therefore, in the expansion jig 7 having the above-described structure, the expansion plate 24 can be lowered by rotating the nut 25, and the slide plates 23-1, 23-2 are moved with the lowering of the expansion plate 24. Are gradually separated. As a result, the extension band 6 can be extended,
Can be easily fixed to the drilled hole 12 of the manhole 11.

FIG. 5 is a diagram showing the configuration of another example of the extension band 6 of the present invention, and FIG. 6 is an enlarged view showing the configuration of the extension jig 7 provided on the extension band 6 shown in FIG. is there. In the examples shown in FIGS. 5 and 6, the same members as those in the examples shown in FIGS. 3 and 4 are denoted by the same reference numerals, and description thereof will be omitted. In the example shown in FIGS. 5 and 6, FIGS.
Are different from the example shown in FIG. 3 in that the extension jig 7 is configured to be detachable from the extension band 6 and a plurality of displacement prevention metal fittings 31 for preventing the extension band 6 from displacing the extension band 6 are provided here. This is the point provided. In the attachment / detachment structure in this example, extension jig attachment portions 33-1 and 33-2 having engagement holes 32 are provided at both ends of the extension band 6, and the extension jig attachment portions 33-3 and 33-2 are provided.
By inserting the pins 34 provided on the projecting portions 21-1 and 21-2 into the engaging holes 32, the projecting portions 21-1 and 21-2 are fixed. I have. In this example, after the extension band 6 is extended, the extension jig 7 can be removed. In addition, the shift prevention metal fitting 31 can further improve the water stopping performance.

FIG. 7 is a view showing the construction of a watertight flexible joint for manholes according to the present invention, and FIG. 8 is a view for explaining an example of a watertight structure in which the watertight flexible joint for manholes shown in FIG. 7 is constructed. FIG. In the examples shown in FIGS. 7 and 8, the same members as those in the examples shown in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof will be omitted. 7 and 8 are different from the examples shown in FIGS. 1 and 2 in that the flexible joint 1 is not formed with the edge 4 and the flexible joint 1 is fixed to the manhole 11 by a protrusion. 3 and a plurality of displacement prevention metal fittings 36 for preventing the extension band 6 from displacing the extension band 6 by pressing the water-blocking pressure-sensitive adhesive layer 35 provided on the outer peripheral surface of the hole 3 with the extension band 6. Here, three points are provided, and a deviation preventing protrusion 37 is formed at an end of the protrusion 3. In this example, the expansion jig 7 is configured to be detachable as shown in FIGS. Therefore, in this example, the structure can be simplified, and the water stopping performance can be further improved.

FIG. 9 is a view for explaining another example of the watertight structure of the present invention. In the example shown in FIG. 9, FIGS.
In addition to the example shown in FIG. 1, a buffer material layer 38 made of soft rubber or a water-swelling material softer than the material of the protrusion 3 is provided at a portion corresponding to the water-blocking adhesive layer 35 provided on the outer peripheral surface of the protrusion 3. The buffer band 38 can be fixed together with the water-blocking pressure-sensitive adhesive layer 35 by the extension band 6. In this example, the projection 37 for preventing displacement is not provided. for that reason,
In the example shown in FIG. 9, the protrusion 3 that is the joint body is
The material of the joint body, which does not undergo large deformation due to earth pressure and water pressure, is made of a hard rubber so that the inner wall of the drilled hole 12 is made of a water-blocking adhesive so as not to protrude into the manhole 11 when water pressure is applied. By providing a buffer layer 38 made of a soft rubber or a water-swelling material at a contact portion via 35, the expansion band 6 can be more easily spread,
In the case of a water-swelling material, it comes into contact with water and expands after being attached, so that the water-blocking pressure-sensitive adhesive layer 35 is securely pressed against the inner wall surface of the drilled hole 12 and the water-blocking performance can be improved.

FIG. 10 is a diagram showing the configuration of still another example of the extension band 6 of the present invention. In the example shown in FIG. 10, an extended band 6 having a concave shape in cross section including a bottom portion 41 and a wall portion 42 erected from both ends of the bottom portion 41 and having a partially cut shape is used. As in the example shown in FIG. 5, a plurality of displacement prevention metal fittings 31 are fixedly provided between the wall portions 42. Further, as will be described in detail with reference to FIG. 11, a pair of expansion jig insertion openings 43-1 and 43-2 are fixedly provided between the wall portions 42 with the cut surface of the expansion band 6 interposed therebetween. .

A guide rail 44 fixed to the bottom 41 at one end faces a stopper 45 fixed to the bottom 42 at the other end. In an actual extension operation, an extension jig described later is attached to the extension jig insertion ports 43-1 and 43-2, and the extension jig is connected to the extension jig insertion ports 43-1 and 43-2 using the extension jig. Increase spacing. At the stage of expansion to a predetermined position, the stopper 46 is inserted between the stopper stopper 45 and the end of the guide rail 44, and then the expansion jig is removed.
And the extension band 6 is fixed. Stopper 46
It is preferable to prepare a type corresponding to the manhole drilling diameter because it can correspond to any drilling diameter.

FIGS. 12 and 13 are diagrams showing the configuration of the extension jig 7 used for the extension band 6 shown in FIG. In the example shown in FIG. 12, a pair of arm parts 52-1 and 52-2 are provided rotatably on the jig main body 51. The tip parts of these arm parts 52-1 and 52-2 are claw parts 53-1.
1, 53-2. A bolt 54 meshes with the jig body 51. A rotation handle 55 is provided at one end of the bolt 54. The other end of the bolt 54 and the arm 52-
1, 52-2 between the link member 56-
1, 56-2.

Therefore, by rotating the rotary handle 55, the bolt 54 moves vertically with respect to the jig main body 51, and this movement is performed via the link members 56-1 and 56-2. It is transmitted to 52-2. When the bolt 54 moves upward in the drawing, a pair of claws 53-1 and 53-
2 expands, and conversely, when the bolt 54 moves downward in the drawing, the pair of claws 53-1 and 53-2 narrow. Therefore, the extension band 6 is extended using the extension jig 7 shown in FIG.
Can be extended.

The example shown in FIG. 13 has basically the same configuration as the example shown in FIG. The difference from the example shown in FIG. 12 is that a hydraulic jack 57 is used instead of the bolt 54, and the hydraulic jack 57 is driven by a hydraulic pump 59 provided via a hose 58. In the example shown in FIG. 13 as well, the claws 53-1 and 53-2 can be driven as in the example shown in FIG.

[0024]

As is apparent from the above description, according to the watertight structure of the present invention, the concave portion provided in the projecting portion can absorb the displacement even if the tube is largely bent. In addition, by providing an extension band in this concave portion, and by pressing and expanding the extension band, the water-blocking pressure-sensitive adhesive layer 35 of the protruding portion is pressure-bonded to the drilled hole of the manhole, whereby good water-stopping can be achieved. Furthermore, when the flexible joint has an edge which is attached in the radial direction of the cylindrical portion in a brim shape, positioning at the time of attaching the joint body is easy to perform, and insufficient insertion, excessive insertion, oblique attachment of the protruding portion at the time of construction. Mistakes can be eliminated. Furthermore, by sticking the edge to the outer wall surface of the manhole with a water-blocking adhesive, the displacement of the joint body with respect to earth pressure and water pressure hardly occurs. By taking the double structure of the material, higher water stopping performance can be maintained.

According to the watertight structure of the present invention, the watertight flexible joint for manholes having the above-described structure is used, and the space between the pipe and the cylindrical portion and the space between the manhole and the outer peripheral cylindrical portion are pressure-bonded with an adhesive. If a watertight structure is configured by fixing, mortar or the like can be easily used without any use. for that reason,
This eliminates the need for skilled work such as formwork assembly work, and does not require waiting for backfilling until the effect of mortar or concrete. The work can be completed in a short time of about 5 minutes, and backfilling is continued after construction. It is possible to work.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an example of a watertight flexible joint for manholes.

FIG. 2 is a diagram for explaining an example of a method of constructing a watertight flexible joint for manholes.

FIG. 3 is a diagram showing a configuration of an example of an extension band of the present invention.

FIG. 4 is an enlarged view showing a configuration of an extension jig provided on the extension band shown in FIG. 3;

FIG. 5 is a diagram showing a configuration of another example of the extension band of the present invention.

6 is an enlarged view showing a configuration of an extension jig provided in the extension band shown in FIG.

FIG. 7 is a view showing a configuration of a watertight flexible joint for manholes according to the present invention.

8 is a diagram for explaining an example of a watertight structure in which the watertight flexible joint for manholes shown in FIG. 7 is constructed.

FIG. 9 is a view for explaining another example of the watertight structure of the present invention.

FIG. 10 is a diagram showing a configuration of still another example of the extension band of the present invention.

FIG. 11 is a diagram showing the extension band of FIG. 10 in detail.

FIG. 12 is a view showing a configuration of an example of an expansion jig of the present invention.

FIG. 13 is a view showing a configuration of another example of the expansion jig of the present invention.

FIG. 14 is a diagram showing a configuration of an example of a conventional manhole watertight joint.

FIG. 15 is a view for explaining an example of a conventional method of constructing a watertight joint for manholes.

Claims (7)

(57) [Claims] 1. A manhole, a pipe, and the manhole.
A watertight and a manhole for friendly shaking joint applied to the joint portion between the tube, the manhole for friendly rattan joint, a cylindrical portion which coaxially inserted into an end portion of said tube, said cylindrical portion at least organic and projection projecting axially at one end, the protruding portion has a recess at the boundary between the cylindrical portion, an outer surface in contact with the <br/> manhole of the projecting portion is flat Wherein a water-blocking pressure-sensitive adhesive layer is provided on the outer surface, and an extension band is inserted into the recess, and the extension band is provided in the recess.
Part is pushed out from the inside, and the water-blocking pressure-sensitive adhesive layer is
The serial drilling holes drilled on the outer wall of the manhole and the projecting portion
Plastically deformed between the outer surface and the water-blocking pressure-sensitive adhesive layer
Watertight structure but which is characterized in that it is crimped to the drilling hole
Build . 2. An end of the recess, which is crimped by the extension band, at the end of the manhole of the recess caused by earth pressure.
2. The watertight structure according to claim 1, further comprising: a projection for preventing displacement of the nozzle inward . To 3. A position corresponding to the stopping aqueous pressure-sensitive adhesive layer of the projecting portion, watertight of the projecting portion from a rubber or water-swellable material of the soft buffer material layer is being claim 1 or 2, wherein provided Structure . 4. The manhole flexible joint is expanded to
Crimping flexible joints for manholes into manhole drilled holes
An extension band used for performing the operation, a stopper for fixing is provided at one end of a cut surface of the extension band, and a guide rail is provided at the other end of the extension band. this stopper is provided between the guide rail
With this, the extension band is fixed in an extended state.
An extension band characterized in that it can be used . 5. A coupled to the extended band, not locked by displacement prevention fitting is provided on the outer wall surface of the manhole
Extended band of claim 4, wherein that. 6. An offset position on the side of the extension band for expanding the flexible joint for manholes to extend the extension band used to crimp the flexible joint for manholes into the drilled holes in the manhole. An extension jig detachably attached to the extension jig, wherein the extension jig is mounted on both sides of the extension band, a protrusion, and a bolt fixed vertically to one of the protrusions; Adjusting the positions of the trapezoidal slide plates provided on each of the protruding portions and expanding as the distance from the protruding portions increases, the trapezoidal expansion plates provided between the respective slide plates and being fitted with the bolts, and the expansion plates The expansion plate is pushed downward by rotating the nut, and each slide plate is lowered by rotating the nut. Therefore expansion jig, characterized in that a push spreading mechanism. 7. An offset position on the side of the extension band for expanding the flexible joint for manholes to extend the extension band used to crimp the flexible joint for manholes into the drilled holes in the manhole. An extension jig removably attached to the extension band, wherein the extension band is provided with a pair of extension jig insertion ports, and the extension jig comprises a jig main body and the pair of extension jig insertion ports. A pair of claw portions that can be mounted on the jig body, and a driving portion that drives the pair of claw portions to expand, the pair of claw portions being rotatably provided on the jig body. An extension jig provided at each of the distal ends of the arm portions and capable of extending the extension band by rotation of the pair of claw portions.