JPH08285169A - Piping fixing device - Google Patents

Abstract

PURPOSE: To reliably fix piping elements by extending slits inside in the radial direction from an outer peripheral surface in respective first and second ring- shaped members, alternately arranging its slits in the circumferential direction of an extensible-contractible member, and connecting these ring-shaped members to each other so as not to relatively move in the shaft direction. CONSTITUTION: A piping fixing device is provided with an expansively openable first ring-shaped member 12 having an inside diameter equal to an outside diameter of a pipe 4 as a first piping element and an expansively openable second ring-shaped member 14 having an inside diameter equal to an outside diameter of a pipe joint 2 as a second piping element. In its respective first and second ring-shaped members 12 and 14, slits 12c are extended inside in the radial direction from an outer peripheral surface, and slits 12d are extended outside in the radial direction from an inner peripheral surface 12h, and these slits 12c and 12d are alternately arranged in the circumferential direction of an extensible-contractible member 12. A connecting part is arranged between the first and the second ring-shaped members 12 and 14, and the first and the second ring-shaped members 12 and 14 are connected to each other so as not to relatively move in the shaft direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe fixing device for temporarily fixing two pipe elements.

[0002]

2. Description of the Related Art Conventionally, in order to join a plastic pipe element such as a plastic pipe or a pipe joint to another plastic pipe element, an adhesive is applied between the two pipe elements to be joined, or an electrical connection is made. The fusion method is adopted.
In the electric fusion method, two pipe elements to be joined are electrically heated and melted, and then the pipe elements are cooled and solidified.

The electric fusion method will be described with reference to FIG.
FIG. 11 shows a state in which the pipe 4 and the pipe 6 are joined via the pipe joint 2 by the electric fusion method. The pipes 4 and 6 are polyethylene pipes having the same nominal diameter, and the pipe joint 2 is the pipes 4 and 6.
Has an inner diameter approximately equal to the outer diameter of The tubes 4, 6 are inserted from each end of the fitting 2. A heating wire 5 formed in a coil shape is embedded in the pipe joint 2. Heating wire 5
It is electrically connected to the power supply device 7 provided outside the pipe joint 2 via the connector pin 3 and the electric wire 9. By supplying electric power to the heating wire 5, the heating wire 5 is heated and the pipe joint 2
And part of the tubes 4, 6 melt. After that, the supply of electric power to the heating wire 5 is stopped, the joint is cooled, and the pipe joint 2
And the tubes 4 and 6 are fixed to each other. As will be appreciated by those skilled in the art, the molten tubing 4, 6 and the fitting 2 must be fixed relative to each other until the tubing elements have been sufficiently cooled and solidified. For that reason,
Plumbing fixtures are used to secure plumbing elements.

FIG. 12 shows a pipe fixing device according to the prior art. The pipe fixing device 1 of FIG. 12 includes two fixing fittings that are connected by two connecting pieces 1b so as to be able to expand. This fixing metal fitting has, at both ends, a clamp portion 1c having an inner diameter substantially equal to the outer diameter of the pipe to be joined. In the case of electric fusion, first, the pipes 4 and 6 to be joined are inserted from both ends of the pipe joint 2 in which the electric wires are embedded as shown in FIG. Then, the fixing screw 1a of the fixing device 1 is loosened to expand the fixing fitting around the connecting piece 1b, and each of the pipes 4 and 6 inserted in the pipe joint 2 is held by the clamp portion 1c. Close the fixing bracket. Finally, by fastening the fixing screw 1a, the tubes 4 and 6 are firmly fixed to the clamp portion 1c. Therefore, the pipes 4 and 6 are prevented from moving in the axial direction and coming off the pipe joint 2.

After that, the electric wire 9 is connected to the connector pin 3 of the pipe joint 2 via the connector 9a, and electric power is supplied to the heating wire 5 (see FIG. 10) to melt the piping element as described above. After stopping the supply of the electric current to the heating wire 5, the fixing device 1 is kept attached until the molten piping element is cooled and solidified. Although there is no particular means for preventing the pipe joint 2 from rotating in the circumferential direction, if the pipe element is placed with the pipe fixing device attached, the pipe joint 2 will not rotate in the circumferential direction. Absent.

[0006]

Although the above-mentioned prior art pipe fixing device can easily fix the pipe element, it cannot be removed from the pipe element until the melted pipe element is solidified. There is a problem that the piping construction time becomes long. For example, when the above-mentioned polyethylene pipe is used as a water pipe buried in the ground, the pipe cannot be buried until the pipe element is solidified after the fusion work, and the construction time becomes long. Also, when joining two pipe elements with an adhesive, the pipe fixing device cannot be removed until the adhesive is solidified. These problems can be solved by providing an inexpensive disposable pipe fixing device. That is, if it is an inexpensive disposable pipe fixing device, after the electrical fusion work or the bonding work is completed, without waiting for the pipe element or the adhesive to solidify, while the pipe fixing device is attached to the pipe element, It becomes possible to embed with piping elements.

An object of the present invention is to solve such a problem of the prior art, and an object thereof is to provide an inexpensive and disposable pipe fixing device capable of surely fixing pipe elements.

[0008]

According to a first aspect of the present invention, there is provided a pipe fixing element for positioning and fixing a first pipe element and a second pipe element, wherein an outer diameter of an end portion of the first pipe element. A first ring-shaped member having an inner diameter approximately equal to and formed to be expandable by an elastic member, and an elastic member having an inner diameter substantially equal to the outer diameter of the end of the second piping element And a second ring-shaped member that is formed, and each of the first and second ring-shaped members has a slit extending radially inward from the outer peripheral surface and a slit extending radially outward from the inner peripheral surface. A stretchable portion arranged in the circumferential direction, a locking means for connecting both ends of the expanded ring-shaped member, and
The gist of the invention is a pipe fixing device including a connecting means for connecting the second ring-shaped member so as not to move relative to each other in the axial direction.

According to a second aspect of the present invention, in the pipe fixing device according to the first aspect, the connecting means includes first and second connecting means.
The gist of the pipe fixing device includes a connecting portion integrally formed with the first and second ring-shaped members between the ring-shaped members. According to a third aspect of the present invention, in the pipe fixing device according to the first aspect, the connecting means includes a first annular rib provided on the first ring-shaped member so as to extend radially outward, The gist of a pipe fixing device is provided with a second ring-shaped rib that extends radially inward in the second ring-shaped member and is provided so as to engage with the first ring-shaped rib.

According to a fourth aspect of the present invention, in a pipe fixing element for positioning and fixing the first piping element and the second piping element, an inner diameter substantially equal to an outer diameter of the end portion of the first piping element is provided. A ring-shaped member formed to be expandable by an elastic member, wherein the ring-shaped member has slits extending radially inward from the outer peripheral surface and slits extending radially outward from the inner peripheral surface alternately in the circumferential direction. And a locking means for connecting both ends of the expanded ring-shaped member,
A pipe fixing device is provided, which comprises a connecting means for connecting the ring-shaped member to the second piping element in order to prevent the ring-shaped member from moving relative to the second piping element.

According to a fifth aspect of the present invention, in the pipe fixing device according to the fourth aspect, the connecting means includes a ring-shaped member and a second pipe element between the ring-shaped member and the second pipe element. A gist of a pipe fixing device having a connecting portion integrally formed with the above. The invention according to claim 6 is
The pipe fixing device according to claim 4, wherein the connecting means includes a first annular rib provided on the ring-shaped member so as to extend radially outward, and a second annular element that extends radially inward on the second pipe element. A gist of a pipe fixing device including one annular rib and a second annular rib engageably provided.

[0012]

The operation of the invention described in claim 1 will be described. First, the first ring-shaped member is expanded and attached to the outer peripheral surface of the first piping element, and then the first ring-shaped member is closed so as to hold the first piping element on the inner peripheral surface thereof. To be The locking means fixes the first ring-shaped member mounted on the first piping element in the closed state. At this time, the expansion / contraction part expands / contracts in a spring or bellows shape to facilitate the work of mounting the first ring-shaped member and hold the first piping element so as to tighten it in a spring shape. The second ring-shaped member is the first
The second pipe element is held so as to be tightened like a spring in the same manner as the ring member. The connecting means provided between the first and second ring-shaped members prevents the first and second ring-shaped members from moving relative to each other in the axial direction, and the first and second piping elements. Are fixed so that they do not move relative to each other.

According to a second aspect of the invention, the connecting means comprises a connecting portion integrally formed with the first and second ring-shaped members, and the connecting portion forms the first and second ring-shaped members. The members are prevented from moving relative to each other in the axial direction. According to the third aspect of the present invention, the first and second annular ribs are engaged with each other to prevent the first and second ring-shaped members from moving relatively in the axial direction.

According to the fourth aspect of the invention, the ring-shaped member is attached to the first piping element. The ring-shaped member in the invention described in claim 4 acts in the same manner as the first ring-shaped member in the invention described in claim 1. The connection means
The ring-shaped member holding the first piping element is directly connected to the second piping element.

According to a fifth aspect of the present invention, the connecting means includes a connecting portion integrally formed with the ring-shaped member and the second pipe element, and the ring-shaped member is connected to the second pipe by the connecting portion. Axial movement relative to the element is prevented. In the invention according to claim 6, the ring-shaped member is prevented from moving relative to the second pipe element in the axial direction by the engagement of the first and second annular ribs.

[0016]

Embodiments of the present invention will be described below with reference to the accompanying drawings. In the embodiment described below, the two pipes 4 and 6 are connected via the pipe joint 2 in the same manner as the prior art with reference to FIG.
The case of joining will be described. In this case, since the pipe 6 is fixed to the pipe joint 2 similarly to the pipe 4, the embodiment of the present invention will be described below by taking the case where the pipe 4 and the pipe joint 2 are fixed as an example.

A first embodiment will be described with reference to FIGS. 1 to 3. The pipe fixing device 10 according to the first embodiment is
Has a first ring-shaped member 12 having an inner diameter substantially equal to the outer diameter of the pipe 4 serving as the piping element, and an inner diameter substantially equal to the outer diameter of the pipe joint 2 serving as the second piping element. And a second ring-shaped member 14 that can be expanded. The first ring-shaped member 12 includes a cutting portion 12i and the cutting portion 1
2i has a slit 12e extending radially outward from the inner peripheral surface 12h on the diametrically opposite side,
The fulcrum portion 16a having a narrow width in the radial direction can be opened from the cutting portion 12i. At both ends of the first ring-shaped member 12 with the cutting portion 12i interposed,
A locking claw 12f serving as a locking means and a locking projection 12g are provided. By winding the first ring-shaped member 12 around the pipe 4 and engaging the locking claws 12f and the locking protrusions 12g, the first ring-shaped member 12 is mounted and fixed on the outer peripheral surface of the pipe 4. It

As shown, the first ring-shaped member 12
Is a slit 12c extending radially from the outer peripheral surface thereof.
And a slit 12d extending radially from the inner peripheral surface 12h.
The stretchable portions 12b and the slits 12 are alternately arranged.
and a support portion 12a on which c and 12b are not provided. The support portion 12a has an effect of increasing the rigidity of the first ring-shaped member 12. The stretchable portion 12b is the slit 12
It is possible to expand and contract like a bellows by c and 12d.
The expansion and contraction of the expansion and contraction portion 12b facilitates the attachment of the first ring-shaped member 12 to the tube 4, and the first ring-shaped member 12 absorbs the outer diameter dimension error of the tube 4 and the inner peripheral surface. 1
Hold the tube 4 securely so that the tube 4 is tightened like a spring in 2 h.

Like the first ring-shaped member 12, the second ring-shaped member 14 has a cutting portion (not shown) and a radial direction from the inner peripheral surface on the diametrically opposite side to the cutting portion. A fulcrum portion 16b (FIG. 3) having a slit 14e (see FIG. 3) extending outward and having a narrow width in the radial direction.
(See) can be expanded from the above cutting portion. Similar to the first ring-shaped member 12, locking claws 14f as locking means and locking protrusions (not shown) are arranged at both ends of the ring-shaped member 14 with the cut portion sandwiched therebetween. By winding the second ring-shaped member 14 around the pipe joint 2 and engaging the locking claws 14f and the locking projections 14g, the second ring-shaped member 24 is mounted on the outer peripheral surface of the pipe joint 2, Fixed.

As shown in the figure, the ring-shaped member 14 has slits 14c extending radially from the outer peripheral surface of the ring-shaped member 14 and slits 14d extending radially from the inner peripheral surface 14h of the ring-shaped member 14. And a supporting portion 14a in which the slits 14c and 14b are not provided. The support portion 14a has an effect of increasing the rigidity of the second ring-shaped member 14. The stretchable portion 14b can be stretched in a bellows shape by the slits 14c and 14d. The expansion and contraction of the expansion and contraction portion 14b facilitates the attachment of the second ring-shaped member 14 to the pipe joint 2, and the second ring-shaped member 14 absorbs the outer diameter dimension error of the pipe joint 2. The pipe joint 2 is securely held so that the pipe joint 2 is tightened like a spring at the inner peripheral surface 14h.

Further, the pipe fixing device 10 includes a connecting portion 17 integrally formed with the first and second ring members as a connecting means between the first and second ring-shaped members 12 and 14. ing. The connecting portion 17 prevents the first and second ring-shaped members 12 and 14 from moving relative to each other in the axial direction. Therefore, the pipe 4 and the pipe joint 2 are fixed so as not to move relative to each other.

Next, a second embodiment of the present invention will be described with reference to FIGS. Pipe fixing device 3 according to the second embodiment
0 is similar to the pipe fixing device 10 according to the first embodiment,
An expandable first ring-shaped member 32 having an inner diameter substantially equal to the outer diameter of the pipe 4 as the first piping element, and an inner diameter substantially equal to the outer diameter of the pipe joint 2 as the second piping element. And a second ring-shaped member 34 that can be expanded. The first ring-shaped member 32 has a cut portion 32i and an inner peripheral surface 32h on the diametrically opposite side to the cut portion 32i.
From the cutting portion 32i around the fulcrum portion 36 having a narrow width in the radial direction. Locking claws 32f and locking protrusions 32g as locking means are disposed at both ends of the first ring-shaped member 32 with the cutting portion 32i interposed therebetween. By winding the first ring-shaped member 32 around the pipe 4 and engaging the locking claw 32f and the locking protrusion 32g, the first ring-shaped member 32 is mounted and fixed on the outer peripheral surface of the pipe 4. It

As shown, the first ring-shaped member 32
Is a slit 32c extending radially from the outer peripheral surface thereof.
And a slit 32d extending radially from the inner peripheral surface 32h.
And the slits 32b and
and a support portion 32a in which c and 32b are not provided. The support portion 32a has an effect of increasing the rigidity of the first ring-shaped member. The stretchable portion 32b includes a slit 32c,
It is possible to expand and contract in a bellows shape by 32d. The first ring-shaped member 32 is formed by the expansion and contraction of the expansion and contraction portion 32b.
Is easily attached to the pipe 4, and the first ring-shaped member 32 absorbs the outer diameter dimensional error of the pipe 4 so that the inner peripheral surface 3
Hold the tube 4 securely so that the tube 4 is tightened like a spring in 2 h.

The second ring-shaped member 34, like the first ring-shaped member 32, has a cutting portion (not shown) and a radial direction from the inner peripheral surface on the diametrically opposite side to the cutting portion. It has a slit 34e extending outward, and can be expanded from the above-mentioned cut portion around a fulcrum portion (not shown) formed to have a narrow width in the radial direction. Similar to the first ring-shaped member 32, a locking claw 34f as a locking means and a locking projection (not shown) are arranged at both ends of the ring-shaped member 34 with the cut portion interposed therebetween. . By winding the second ring-shaped member 34 around the pipe joint 2 and engaging the locking claws 34f and the locking protrusions 34g, the second ring-shaped member 34 is mounted on the outer peripheral surface of the pipe coupling 2, Fixed.

As shown, the second ring-shaped member 34
Similarly to the first ring-shaped member 32, a stretchable portion 34b in which a slit 34c extending radially from the outer peripheral surface thereof and a slit 34d extending radially from the inner peripheral surface 34h are alternately arranged, and a slit. And a support portion 34a in which 34c and 34b are not provided. The support portion 34a has the effect of increasing the rigidity of the second ring-shaped member. The expandable part 34b can be expanded and contracted in a bellows shape by the slits 34c and 34d. The expansion and contraction of the expansion and contraction portion 34b facilitates the attachment of the second ring-shaped member 34 to the pipe joint 2, and the second ring-shaped member 34 absorbs the outer diameter dimensional error of the pipe joint 2 to allow the inner connection. The pipe joint 2 is securely held so that the pipe joint 2 is tightened like a spring at the peripheral surface 34h.

The pipe fixing device 30 according to the second embodiment is
The first annular rib 3 serves as a connecting means for connecting the first ring-shaped member 32 and the second ring-shaped member 34 in the axial direction.
2j and a second annular rib 34j. As can be seen with particular reference to FIG. 5, the first annular rib 32j
Are projected radially outward from the inner peripheral surface 32h of the first ring-shaped member 32, and the second annular ribs 34j are projected radially inward from the inner peripheral surface 34h of the second ring-shaped member 34. It is provided in. Preferably, the first annular rib 32j is arranged so as to be separated from the first ring-shaped member 32 by a distance approximately equal to the axial width of the second annular rib 34j. When installing the pipe fixing device 30,
The expanded first and second ring-shaped members 32, 34 are
Is wound around the pipe 4 and the pipe joint 2 so that the second annular ribs 32j and 34j engage with each other, and the respective locking claws 32f,
34f is engaged with the locking projection 32g (the locking projection of the second ring-shaped member is not shown). As shown in FIG. 5, by engaging the first and second annular ribs 32j and 34j, the first and second ring-shaped members 32 and 34 are coupled so as not to move relatively in the axial direction. It Therefore, the pipe 4 and the pipe joint 2 are fixed so as not to move relative to each other.

A third embodiment will be described with reference to FIGS. 6 to 8. The pipe fixing device according to the third embodiment includes an expandable ring-shaped member 20 having an inner diameter substantially equal to the outer diameter of the pipe 4 as the first pipe element. The ring-shaped member 20 has a cut portion 20i and a slit 20e that extends radially outward from the inner peripheral surface 20h on the diametrically opposite side of the cut portion 20i, and has a narrow width in the radial direction. It is possible to expand from the cutting portion 20i around the fulcrum portion 24 that is formed. Locking claws 20f and locking projections 20g as locking means are provided at both ends of the ring-shaped member 20 with the cutting portion 20i interposed therebetween. By winding the ring-shaped member 20 around the pipe 4 and engaging the locking claw 20f and the locking projection 20g, the ring-shaped member 2
0 is attached and fixed to the outer peripheral surface of the tube 4.

As shown in the figure, the ring-shaped member 20 has a stretchable portion 20b in which slits 20c extending radially from the outer peripheral surface thereof and slits 20d extending radially from the inner peripheral surface 20h are alternately arranged. Slits 20c, 20b
And a supporting portion 20a in which is not provided. The support portion 20a has an effect of increasing the rigidity of the ring-shaped member. The stretchable portion 20b can be stretched in a bellows shape by the slits 20c and 20d. The expansion and contraction of the expansion and contraction portion 20b facilitates mounting of the ring-shaped member 20 on the pipe 4, and the ring-shaped member 20 absorbs the outer diameter dimensional error of the pipe 4 to secure the pipe 4 at the inner peripheral surface 20h. Hold the tube 4 securely so that it is tightened like a spring.

The pipe fixing device according to the third embodiment has a connecting portion 21 integrally formed with the ring-shaped member 20 and the pipe joint 22 as a connecting means for connecting the ring-shaped member 20 to the pipe joint 22. (See FIG. 8), the ring-shaped member 20 is directly connected to the pipe joint 22. The connecting portion 21 prevents the ring-shaped member 20 from moving in the axial direction relative to the pipe joint 22, and the pipe 4 is fixed to the pipe joint 22.

A fourth embodiment will be described with reference to FIGS. The pipe fixing device according to the fourth embodiment includes an expandable ring-shaped member 40 having an inner diameter substantially equal to the outer diameter of the pipe 4 as the first pipe element. The ring-shaped member 40 has a cut portion 40i and a slit 40e extending radially outward from the inner peripheral surface 40h on the diametrically opposite side of the cut portion 40i, and is formed to have a narrow width in the radial direction. The cutting portion 40i can be expanded around the fulcrum portion 41 formed as a center. At both ends of the ring-shaped member 40 with the cutting portion 40i interposed therebetween, locking claws 4 as locking means are provided.
0f and a locking protrusion 40g are provided. By winding the ring-shaped member 40 around the pipe 4 and engaging the locking claw 40f and the locking protrusion 40g, the ring-shaped member 40
Is attached and fixed to the outer peripheral surface of the tube 4.

As shown in the figure, the ring-shaped member 40 has a stretchable portion 40b in which slits 40c extending radially from the outer peripheral surface and slits 40d extending radially from the inner peripheral surface 40h are alternately arranged. Slits 40c, 40b
And a support portion 40a in which is not provided. The support portion 40a has an effect of increasing the rigidity of the ring-shaped member. The expansion / contraction part 40b can be expanded / contracted in a bellows shape by the slits 40c, 40d. The expansion and contraction of the expansion and contraction portion 40b facilitates the attachment of the ring-shaped member 40 to the pipe 4, and the ring-shaped member 40 absorbs the outer diameter dimension error of the pipe 4 so that the pipe 4 can be attached to the inner peripheral surface 40h. Tighten it like a spring and hold it securely.

The pipe fixing device according to the fourth embodiment comprises an annular rib 40j and an annular groove 42j as connecting means for connecting the ring-shaped member 40 and the pipe joint 42 in the axial direction. As can be seen with particular reference to FIG.
The annular rib 40j of the inner peripheral surface 40h of the ring-shaped member 40 is
The annular groove 42j is formed on the outer peripheral surface near the end of the pipe joint 42. When mounting the pipe fixing device 30, the annular rib 40j is fitted in the annular groove 42j.
The expanded ring-shaped member 40 so that
It is wrapped around the pipe joint 2 to engage the locking claw 40f and the locking projection 40g. As shown in FIG. 5, the annular rib 4
By fitting 0j into the annular groove 42j, the ring-shaped member 40 and the pipe joint 42 are coupled so as not to move relatively in the axial direction. Therefore, the pipe 4 is fixed to the pipe joint 42.

Although four embodiments have been described as the preferred embodiments of the present invention, the present invention is not limited to these embodiments, and improvements and modifications can be made without departing from the spirit and scope of the present invention. This is a matter of course for those skilled in the art. For example, although the embodiment of the present invention has been described by taking a pipe and a pipe joint as an example of the first and second pipe elements, the first and second pipe elements may be, for example, a T joint or an elbow joint.

In the above-mentioned embodiments, the ring-shaped member has been described as having the expanding / contracting portion and the supporting portion, but the supporting portion is merely an element for increasing the rigidity of the pipe fixing device and is essential to the present invention. Not an element. That is, the shape of the ring-shaped member,
Depending on the size or the choice of material, the ring-shaped member can be constructed without the support. Further, the fulcrum portion provided on the support portion is for facilitating the expansion of the ring-shaped member and is not an essential element of the present invention. That is, it is possible to expand the ring-shaped member without providing the fulcrum portion, depending on the shape, size, or material of the ring-shaped member.

Although the locking means is described as having the locking claws and the locking projections in the embodiment, for example, the locking means is provided with a pair of locking projections at both ends of the ring-shaped member,
It may be configured by a separate locking member that can be engaged with the pair of locking projections.

Although the ring-shaped member has been described as being simply expandable in the above-mentioned embodiments, the ring-shaped member is formed of an elastic material made of a plastic material such as polyethylene, polypten or polypropylene, or a flexible metal material. can do.

[0037]

As is apparent from the above description, according to the present invention, there is provided a pipe fixing device capable of securely holding two pipe elements so as not to move relative to each other.
Since this pipe fixing device can be inexpensively formed from flexible plastic or metal, it is not necessary to remove the pipe element from the pipe element after the pipe element is joined by electric fusion or an adhesive, and the pipe fixing device can be embedded together with the pipe element. can do.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a first embodiment.

FIG. 2 is a partial cross-sectional view of the first embodiment.

FIG. 3 is a rear view seen in the direction of arrow III in FIG.

FIG. 4 is a schematic perspective view of a second embodiment.

FIG. 5 is a partial cross-sectional view of the second embodiment.

FIG. 6 is a schematic perspective view of a third embodiment.

FIG. 7 is a partial cross-sectional view of a third embodiment.

FIG. 8 is a rear view seen in the direction of the arrow IIIV in FIG.

FIG. 9 is a schematic perspective view of a fourth embodiment.

FIG. 10 is a partial sectional view of a fourth embodiment.

FIG. 11 is a schematic diagram for explaining an electric fusion method.

FIG. 12 is a pipe fixing device according to the prior art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Piping fixing device 12 ... 1st ring-shaped member 12b ... Stretching part 12f ... Locking claw 12g ... Locking protrusion 14 ... 2nd ring-shaped member 14b ... Stretching part 14f ... Locking claw 14g ... Locking protrusion 16 … Support point

Claims (6)

[Claims] 1. A pipe fixing element for positioning and fixing a first piping element and a second piping element, which has an inner diameter substantially equal to the outer diameter of the end portion of the first piping element and is expandable by an elastic member. A first ring-shaped member formed on the second pipe element, and a second ring-shaped member which has an inner diameter substantially equal to the outer diameter of the end of the second piping element and which is formed to be expandable by an elastic member, Each of the first and second ring-shaped members includes a stretchable portion in which slits extending radially inward from the outer peripheral surface and slits extending radially outward from the inner peripheral surface are alternately arranged in the circumferential direction, and A pipe fixing device comprising: locking means for connecting both ends of an opened ring-shaped member; and connection means for connecting the first and second ring-shaped members so as not to move relative to each other in the axial direction. 2. The pipe according to claim 1, wherein the connecting means includes a connecting portion integrally formed with the first and second ring-shaped members between the first and second ring-shaped members. Fixing device. 3. The first connecting rib is provided on the first ring-shaped member so as to extend radially outward, and the connection means extends radially inward on the second ring-shaped member. The pipe fixing device according to claim 1, further comprising a second annular rib provided so as to engage with the annular rib. 4. A pipe fixing element for positioning and fixing a first piping element and a second piping element, which has an inner diameter substantially equal to the outer diameter of the end portion of the first piping element and is expandable by an elastic member. The ring-shaped member comprises a ring-shaped member, wherein the ring-shaped member has slits extending radially inward from the outer peripheral surface and slits extending radially outward from the inner peripheral surface, and the expandable portion is arranged in the circumferential direction. And locking means for connecting both ends of the expanded ring-shaped member, and connecting the ring-shaped member to the second piping element to prevent the ring-shaped member from moving relative to the second piping element. And a connecting device for connecting the pipe. 5. The connecting means according to claim 4, wherein the connecting means includes a connecting portion integrally formed with the ring-shaped member and the second piping element between the ring-shaped member and the second piping element. Pipe fixing device. 6. The coupling means engages with a first annular rib provided on a ring-shaped member so as to extend radially outward, and with the first annular rib extending radially inward on a second piping element. The pipe fixing device according to claim 4, further comprising a second annular rib provided so as to be fitted to each other.