JPH022137Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is designed to prevent damage and leakage of humid pipes buried underground as pipes for water, sewage, industrial water, etc., earthquakes, uneven ground subsidence, or aging of pipes or packing materials. The present invention relates to a pipe joint that is constructed from inside the pipe at the leakage part or leak-prone part in order to prevent leakage of gas, water, etc. from the pipe joint part.

Recently, as this type of pipe fitting,
As described in Japanese Utility Model No. 58-24594, a rubber cylindrical body is installed across the leakage part,
It is known that air and water tightness is maintained by crimping both ends of a rubber cylindrical body to the inner surface of the tube using metal rings.

However, this type of pipe fitting has a problem in the connection part of the metal ring, that is, the long hole provided in the fastener is provided in the circumferential direction, so the direction of movement of the fastener and the direction of the long hole, and the Because the directions of the forces acting to loosen the tools are the same, the fasteners tend to loosen, and it is difficult to apply the best tightening pressure to the rubber cylindrical body by adapting to errors in the inner diameter of the pipe, making it difficult to apply the best possible tightening pressure to the rubber cylindrical body. There was a problem that air and water tightness could not be maintained.

The present invention aims to provide a pipe joint that improves the above-mentioned problems.

Embodiments of the present invention will be described below based on the drawings.

1 to 5 show embodiments of the present invention.

A pipe joint A is provided across the connecting portion b of the pipes a and a'.

Pipe joint A consists of a cylindrical body 1 made of an elastic member such as rubber or synthetic resin, which straddles the connecting part b of tubes a and a' and has both ends crimped to the inner peripheral surfaces of the tubes a and a'. 1 and annular fasteners 2, 2' for crimping the both ends of the pipes 1 to the inner circumferential surfaces of the tubes a, a' from their inner circumferential sides.

Since the fasteners 2 and 2' are symmetrical, a description of the fastener 2' will be omitted in the following description of the fastener 2, by assigning the same reference numerals to the same parts in the drawings. Furthermore, although FIG. 3 is a perspective view showing the disassembled state of the fastener 2, since the perspective view showing the disassembled state of the fastener 2' is the same as that of the fastener 2, Each symbol should be marked with a dash to read it differently.

The fastener 2 is made of a rigid body such as metal or synthetic resin and is shaped like a strip. It is composed of an annular or arc-shaped ring component 3 having at least two opposing free ends and a spacer 4. Stoppers 3c and 3d made of rod-shaped bodies are provided on the inner circumferential surfaces of opposing ends 3a and 3b of the ring component 3, respectively.

The stopper 3c is provided to be perpendicular to the side surface of the ring component 3, and the stopper 3d is provided to be inclined in the width direction of the ring component 3, that is, to be diagonal to the side surface.

However, the stoppers 3c and 3d are not limited to rod-shaped bodies, and may be of other shapes such as plate-shaped bodies.Also, the stoppers 3c and 3d may both be diagonal to the side surface, or the stopper 3c may be diagonal to the side surface. The stopper 3d may be perpendicular to the side surface. Therefore, basically, it is sufficient that the stopper is provided such that at least one of the two stoppers is inclined with respect to the width direction.

Further, although the ring component 3 is shown as being divided into two parts in the illustrated example, it may be one part obtained by cutting one part of the annular body, or it may be divided into two or more parts.

Bolts 5 are installed on the inner circumferential surfaces of the end portions 3a and 3b of the ring component 3 on lines parallel to the stoppers 3c and 3d, respectively, between the end surfaces and the stoppers 3c and 3d.
a, 5a, 5b, and 5b are provided. These bolts 5a, 5a, 5b, 5b and nuts 5c, 5
c, 5d, 5d and washers 5e, 5e, 5
A locking tool 5 for locking the spacer 4 to the ring component 3 is configured at f and 5f. However, this locking tool 5 is not limited to this. For example, a bolt hole may be formed in the end portions 3a, 3b of the ring component 3 between the end face and the stoppers 3c, 3d on a line parallel to the stoppers 3c, 3d. It is also possible to provide a bolt and screw the bolt into the bolt. Also, bolt 5
The numbers of a and 5b are not limited to two each, and may be one or more. Furthermore, it is not necessary to provide it on both ends 3a and 3b of the ring component 3, but it is sufficient if it is provided on at least one of them.

The spacer 4 is a trapezoidal plate having end surfaces 4a and 4b parallel to the stoppers 3c and 3d.

The spacer 4 has locking tools 5, 5 bolts 5a, 5
Before inserting the bolts 5a, 5b, 5b and fixing the ring component 3 and the spacer 4, insert the bolts 5a, 5a,
Elongated holes 4c and 4d are provided in which both end surfaces 4a and 4b of the spacer 4 can be slid into contact with the stoppers 3c and 3d while the spacers 5b and 5b are inserted therethrough. Long hole 4c,
4d are provided in the same direction as the stoppers 3c and 3d, respectively.

Note that the elongated hole may be provided at least on one side where the locking tool is provided.

One embodiment of the cylindrical body 1 will be described based on FIG. 4. The cylindrical body 1 has both end portions 6, 6' thickened, and an intermediate portion 7 thereof formed thick. .

Since both ends 6 and 6' are formed symmetrically, one end 6 will be explained.
A description of the other end 6' will be omitted by assigning the same reference numerals with a dash added to the same parts.
Tongue-like pieces 6a, 6b, 6c, and 6d are provided on the outer periphery of the end portion 6 to improve air and water tightness, and tongue-like pieces are provided at the bases of the tongues 6a, 6b, 6c, and 6d, respectively. Annular grooves 6e, 6f, 6g, 6h, and 6i are provided to facilitate deformation of the pieces 6a, 6b, 6c, and 6d, and to provide a place for the elastic body to escape during deformation.

Further, a fastener 3 is attached to the inner periphery of the end portion 6,
A circumferential groove 6j is provided to prevent movement after installation.

The inner thick portions 6k and 6l of the end portion 6 prevent dirt, etc. from entering the tongue-like pieces 6a, 6b, 6c, and 6d when used attached to the pipe a, and prevent the tongue-like pieces 6a,
This is to prevent excessive compressive deformation of 6b, 6c, and 6d and to maintain air/water tightness for a long period of time.

Here, the intermediate part 7 is shown to be thin with an annular groove formed on the outer circumferential side, but on the contrary, an annular groove is formed on the inner circumferential side in the same way as shown in FIG. Thin or thin
It may be made thinner by forming annular grooves on both sides of the outer periphery, or may have a plurality of grooves rather than just one, and can be modified in various ways.

FIG. 5 shows another embodiment of the cylindrical body 1.
Tongue-shaped pieces 6m and 6n provided on the outer periphery of both ends 6 and 6'
The tongue-like piece 6m on the outer side faces outward, the tongue-like piece 6n on the inner side faces inward, and the tongue-like piece 6 is attached to the base of both ends.
Annular grooves 6p, 6q, 6r, and 6s are provided to facilitate the deformation of the tongues 6m and 6n, and to allow the deformation to a large extent.
A thick protrusion 6t that can support the back of the tongue-like pieces 6m and 6n is provided to prevent the tongues m and 6n from turning over to the back side due to water pressure etc. and significantly reducing air and water tightness. be.

Since other points are similar to the embodiment shown in FIG. 4, corresponding parts are given the same reference numerals and their explanation will be omitted.

When fixing the fasteners 2, 2' indicated at 8, 8' in the figure on the inner peripheral side of the ends 6, 6' of the cylindrical body 1, in order to provide an arbitrary tightening force, the ring component members 3, 3 This is a fitting for increasing the diameter of the distance between the end surfaces 3a and 3b of ' with a jack 9 or the like.

Since the pipe joint of the present invention is constructed as described above, it has the following effects.

A plate in which the fastener is composed of a ring component and a spacer, at least one of the stoppers provided on the inner peripheral surface of the end of the ring component is provided obliquely in the width direction, and the spacer has an end surface parallel to the stopper. A long hole is provided in the spacer in parallel with the stopper, and the bolt of the locking device is inserted into the long hole, and the spacer is interposed between the stopper provided on the ring component and the ring component is assembled. By making the spacer contact and slide against the stopper, the distance between the stoppers, that is, between the end faces of the ring components, can be freely adjusted. Since the circumference can be freely selected, the tightening force of the cylindrical body can be freely selected, and as a result, the optimum tightening force can be applied in terms of air and water tightness. In addition, since the elongated hole provided in the spacer is provided perpendicularly or inclined to the circumferential direction of the fastener, which is the direction in which force acts directly, that is, the side surface of the ring component, the force acting on the fastener is Since this is not a direct force, but rather acts as a component force with an angle to the circumferential direction, the force that the locking device receives is small, and as a result, air/water tightness is reduced due to the loosening of the locking device. There is almost no need to consider the decrease in water resistance, and air/water tightness can be maintained for a long period of time.

Furthermore, with the configuration described above, the circumferential length of the fastener can be changed extremely easily by moving the position of the fastener along the long hole provided in the spacer. Installation and adjustment of fasteners is extremely easy.

Furthermore, the end face of the spacer comes into sliding contact with the stopper,
In addition, the spacer and the ring component are fixed and locked by the locking tool while the stopper is in sliding contact with the inner circumferential surface of the end of the opposing ring component, so the fixation and locking is stable and strong. can be taken as a thing.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing one embodiment of the present invention;
The figures are a cross-sectional view of Fig. 1, Fig. 3 is a perspective view showing the disassembled state of the fastener, Fig. 4 is a partially cutaway sectional view showing an embodiment of the cylindrical body, and Fig. 5 is a sectional view of the cylindrical body. It is a partially cutaway sectional view showing another example of the shaped body. a, a'...pipe, b...connection, A...pipe joint,
1... Cylindrical body, 2, 2'... Fastener, 3, 3'...
Ring component members, 3a, 3'a, 3b, 3'b...
Ends of ring components, 3c, 3'c, 3d,
3'd...stopper, 4,4'...spacer,
4a, 4'a, 4b, 4'b...end surface, 4c, 4d
... Long hole, 5, 5'... Locking tool, 5a, 5'a, 5
b, 5'b...Bolt, 5c, 5'c...Nut,
5d, 5'd... Washer, 6, 6'... End of cylindrical body, 6a, 6'a, 6b, 6'b, 6c, 6'
c, 6d, 6'd, 6m, 6'm, 6n, 6'n...
...tongue, 6e, 6'e, 6f, 6'f, 6g,
6'g, 6h, 6'h, 6i, 6'i, 6p, 6'
p, 6q, 6'q, 6r, 6'r... annular groove, 6j
... Circumferential groove, 6k, 6'k, 6l, 6'l... Thick part, 6t... Protrusion, 7... Middle part, 8, 8'...
Our metal fittings, 9... Jyatsuki.

Claims (1)

[Scope of utility model registration request] A cylindrical body made of an elastic material such as rubber or synthetic resin whose both ends are crimped to the inner peripheral surface of the pipe across the connection or leakage part of the pipe, and the cylindrical body is inserted into the pipe from the inner peripheral side. A pipe joint comprising an annular fastener for crimping onto an inner circumferential surface, the fastener having at least two opposing free ends, and at least one of the ends on the inner circumferential surface of each end in the width direction. A spacer comprising a ring component provided with an inclined stopper, and a spacer having an end face parallel to each of the stoppers and an overlapping portion with each end of the ring component, at least one of the overlapping portions. A pipe joint characterized in that a long hole is provided in the same direction as the stopper, and a locking tool is inserted into the long hole to fix the spacer and the ring component.