JPH022135Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is designed to prevent damage and leakage of humid pipes buried underground for water, sewage, industrial water, etc. due to 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 that act to loosen the fittings are the same, the tightening fittings 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 tube, and There was a problem that air and water tightness could not be maintained during the period.

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'. The tubes 1 are composed of annular fasteners 2 and 2' for crimping both ends of the pipes 1 and 1 onto the inner circumferential surfaces of the tubes a and a'.

Since the fasteners 2 and 2' are symmetrical, a description of the fastener 2' will be omitted hereinafter by referring to the same reference numerals to the same members 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 formed into a strip shape, and has an annular or arcuate ring component 3 having at least two opposing free ends.
and a spacer 4.

Opposing end surfaces 3a, 3b of ring component 3
has an inclined end surface, at least one end surface of which is inclined in the width direction of the ring component 3.

That is, the end surface 3a is an inclined end surface obliquely intersecting the circumferential direction, that is, the side surfaces 3c, 3d, and the end surface 3b is an inclined end surface obliquely intersecting with the side surfaces 3c, 3d.
It is formed on a vertical end face perpendicular to the

However, the end surfaces 3a and 3b are not limited to this shape, and both may be formed as inclined end surfaces that obliquely intersect with the side surfaces 3c and 3d. Basically, at least one end surface is an inclined end surface that is inclined in the width direction. It is sufficient if it has the following.

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.

The ring component 3 has bolt holes 5b, 5b into which two bolts 5a, 5a are screwed, on a line parallel to the inclined end surface of the end surface 3a.

The bolts 5a, 5a, bolt holes 5b, 5b, and washers 5c, 5c constitute a locking tool 5 for locking the spacer 4 to the ring component 3. However, this locking tool 5 is not limited to this. For example, a bolt may be provided by welding or the like on a line parallel to the inclined end surface of the end surface 3a of the ring component 3, and a nut may be screwed onto this bolt. It is also possible to use Further, the locking tool 5 is similarly provided on a line parallel to the end surface 3b of the ring component 3, and may be provided along each of the both end surfaces 3a and 3b. The number of 5a is not limited to two, and may be one or more.

The spacer 4 is integrally attached by welding or the like to a trapezoidal wedge plate 4A having end surfaces 4a and 4b parallel to opposing end surfaces 3a and 3b of the ring component 3, and an inner circumferential surface of the wedge plate 4A, An overlapping portion 4B- of the inner circumferential surface 3e of both ends of the ring component 3
It consists of a splint material 4B having a.

Of course, the wedge plate material 4A and the splicing plate material 4B may be made integrally from one member. The bolts 5a, 5a of the locking tools 5, 5 are inserted into the splint material 4B, and before fixing the ring component 3 and the spacer 4, both end faces 4a, 4b of the wedge plate material 4A are inserted while the bolts 5a, 5a are inserted. A long hole 4c is provided in the opposing end surfaces 3a and 3b of the ring component 3 so that the ring member 3 can slide into contact with the end faces 3a and 3b.

The long holes 4c are bolts 5a, 5a (locking tools 5, 5)
is provided in the same direction as the end surface 4a on which it is fixed.

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

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-shaped pieces 6a, 6b, 6c, and 6d are provided on the outer periphery of the end portion 6 to improve air/water tightness.
Annular grooves 6e, 6f are provided at the bases of the tongues 6a, 6b, 6c, and 6d, respectively, to facilitate deformation of the tongues 6a, 6b, 6c, and 6d, and to provide a place for the elastic body to escape during deformation. , 6g, 6h, and 6i are provided.

Further, a fastener 3 is attached to the inner periphery of the end portion 6, and a circumferential groove 6j is provided to prevent the fastener from moving after being attached.

The thick wall 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 circumference side, but on the contrary, an annular groove is formed on the inner circumference side as shown in FIG. It can be made thinner, or it can be made thinner by forming annular grooves on both the inner and outer peripheries, or it can be made thinner by forming annular grooves on both the inner and outer peripheries, or it may have a plurality of grooves instead of just one, and can be modified in various ways.

FIG. 5 shows another embodiment of the cylindrical body 1, in which tongue-shaped pieces 6m and 6n are 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.

The fastener is composed of a ring component and a spacer, at least one of the opposing end surfaces of the ring component has an inclined end surface, and the spacer is a wedge plate material having an end surface parallel to the opposing end surfaces of the ring component. A splint material is integrally fixed to the inner peripheral surface of the plate material by welding or the like, and has an overlapping part with the inner peripheral surface of both ends of the ring component, and the overlapping part of the splint material has a part that is the same as the end surface of the wedge plate material. A long hole is provided in the direction, and a bolt of the locking tool is inserted into the long hole to lock the ring component and the spacer with the wedge plate interposed between the end faces of the ring component. Therefore, by contacting and sliding the wedge plate material of the spacer on the opposite end surfaces of the ring component, the distance between the end surfaces of the ring component can be freely adjusted, and therefore the circumference of the fastener can be adjusted. This means that 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 holes provided in the splint material are 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, because of the above-mentioned configuration, 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 splint material. , the fasteners can be installed and adjusted extremely easily.

Furthermore, in a state where the plate end surfaces of the wedge plate material are in sliding contact with the end surfaces of the opposing ring component members, and the splint material is in sliding contact with the end inner circumferential surfaces of the opposing ring component members,
The wedge plate material and the ring component are fixed by the locking tool,
Since it is locked, the fixing and locking can be made stable and strong.

[Brief explanation of the drawing]

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... Fastener, 3, 3'... Ring component, 3a, 3'a, 3b, 3'b... End surface (of ring component), 3c, 3'c ,3d,
3'd... Side surface, 3e, 3'e... End inner peripheral surface (of the ring component), 4... Spacer, 4A,
4'A...Wedge plate material, 4B, 4'B...Splice plate material, 4B
-a...overlapping part, 4a, 4'a, 4b, 4'b
... End face, 4c, 4'c ... Long hole, 5, 5' ... Locking tool, 5a, 5'a ... Bolt, 5b, 5'b ...
Bolt hole, 5c, 5'c... 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...tongu, 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...Intermediate part,
8, 8'...This metal fitting, 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 an inner circumferential surface, the fastener having at least two opposing free ends, and at least one end surface having an inclined end surface; Consisting of a spacer and a locking tool that locks both,
A wedge plate material in which the spacer has an end surface parallel to the free end of the ring component member, and the wedge plate material is integrally attached to the inner circumferential surface of the wedge plate material, and is overlapped with the inner circumferential surface of both opposing ends of the ring component member. and a splint material having a long hole in the same direction as the end surface of the wedge plate material in at least one of the overlapping parts, and a locking tool is inserted into the long hole to attach the splint material to the ring component member. A pipe joint characterized by being fixed to.