JP3608837B2 - Pipe 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

[0001]
[Industrial application fields]
The present invention relates to a pipe fixing device for temporarily fixing two pipe elements.
[0002]
[Prior art]
Conventionally, in order to join plastic pipe elements such as plastic pipes and pipe joints with other plastic pipe elements, an adhesive is applied between the two pipe elements to be joined, or an electric fusion method has been adopted. Has been. In the electrofusion method, two pipe elements to be joined are electrically heated and melted, and then the pipe elements are cooled and solidified.
[0003]
The electrofusion 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 has an inner diameter substantially equal to the outer diameter of the pipes 4 and 6. The tubes 4 and 6 are inserted from the respective ends of the joint 2. A heating wire 5 formed in a coil shape is embedded in the pipe joint 2. The heating wire 5 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 a part of the pipe joint 2 and the pipes 4 and 6 are melted. Thereafter, the supply of electric power to the heating wire 5 is stopped, the joint is cooled, and the pipe joint 2 and the pipes 4 and 6 are fixed. As will be appreciated by those skilled in the art, these piping elements must be secured against relative movement until the molten tubes 4, 6 and the fitting 2 are sufficiently cooled and solidified. Therefore, conventionally, a pipe fixing device has been used to fix the pipe element.
[0004]
FIG. 12 shows a conventional pipe fixing device. The pipe fixing device 1 of FIG. 12 includes two fixing brackets that are connected to each other by two connecting pieces 1b so as to be expandable. This fixing bracket has clamp portions 1c having an inner diameter substantially equal to the outer diameter of the pipe to be joined at both ends. When the electric fusion is performed, 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. Next, the fixing screw 1a of the fixing device 1 is loosened so that the fixing bracket is expanded around the connecting piece 1b, and each of the tubes 4 and 6 inserted into 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.
[0005]
Then, the electric wire 9 is connected to the connector pin 3 of the pipe joint 2 via the connector 9a, and as described above, electric power is supplied to the heating wire 5 (see FIG. 10) to melt the piping element. After the supply of current to the heating wire 5 is stopped, the fixing device 1 is kept mounted until the molten piping element is cooled and solidified. Means for preventing the pipe joint 2 from rotating in the circumferential direction is not particularly provided. However, if the pipe element is placed with the pipe fixing device attached, the pipe joint 2 is not rotated in the circumferential direction. Absent.
[0006]
[Problems to be solved by the invention]
The above-described prior art piping fixing device can easily fix the piping element, but it cannot be removed from the piping element until the molten piping element is solidified, and there is a problem that the piping construction time becomes long. . For example, when the polyethylene pipe described above 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. Similarly, when two piping elements are joined by an adhesive, the pipe fixing device cannot be removed until the adhesive is solidified. Such a problem can be solved by providing an inexpensive disposable pipe fixing device. In other words, if it is an inexpensive disposable pipe fixing device, after the electric fusion work or bonding work is completed, the pipe element or adhesive remains solid without attaching to the pipe element or waiting for the pipe element or adhesive to solidify. It becomes possible to embed together with the piping element.
[0007]
An object of the present invention is to solve such problems of the prior art, and an object of the present invention is to provide an inexpensive and disposable pipe fixing device that can reliably fix the piping elements.
[0008]
[Means for Solving the Problems]
The invention according to claim 1 is a piping fixing element for positioning and fixing the first piping element and the second piping element.
A first ring-shaped member having an inner diameter substantially equal to the outer diameter of the first piping element end and formed to be expandable by an elastic member; and an inner diameter substantially equal to the outer diameter of the second piping element end. A second ring-shaped member 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; The gist of the present invention is a pipe fixing device comprising locking means for connecting both ends of the opened ring-shaped member and connecting means for connecting the first and second ring-shaped members so as not to move relative to each other in the axial direction.
[0009]
According to a second aspect of the present invention, in the pipe fixing device according to the first aspect, the connecting means is integrated with the first and second ring-shaped members between the first and second ring-shaped members. The gist of the pipe fixing device including the formed connecting portion.
According to a third aspect of the present invention, in the pipe fixing device according to the first aspect, the connection means includes a first annular rib provided to extend radially outward in the first ring-shaped member, The gist of the present invention is a pipe fixing device including a second annular rib provided to extend radially inward in the two ring-shaped members and engage with the first annular rib.
[0010]
The invention according to claim 4 is a piping fixing element for positioning and fixing the first piping element and the second piping element.
A ring-shaped member having an inner diameter substantially equal to the outer diameter of the first pipe element end and formed to be expandable by an elastic member;
The ring-shaped member 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 both ends of the expanded ring-shaped member. A pipe fixing device comprising locking means for fastening, and 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. The gist.
[0011]
According to a fifth aspect of the present invention, in the piping fixing device according to the fourth aspect, the connecting means is integrated with the ring-shaped member and the second piping element between the ring-shaped member and the second piping element. The gist is a pipe fixing device having a connecting portion formed in the above. According to a sixth aspect of the present invention, in the pipe fixing device according to the fourth aspect of the present invention, a first annular rib provided so that the connecting means extends radially outward in the ring-shaped member, and a second pipe. The gist of the pipe fixing device includes a second annular rib that extends radially inward in the element and is provided so as to be engageable with the first annular rib.
[0012]
[Action]
The operation of the first aspect of the invention 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. It is done. The locking means fixes the first ring-shaped member attached to the first piping element in a closed state. At this time, the expansion / contraction part expands / contracts in a spring shape or a bellows shape to facilitate the mounting operation of the first ring-shaped member and hold the first piping element so as to be tightened in a spring shape. The second ring-shaped member holds the second piping element in a spring-like manner in the same manner as the first ring-shaped member. The connecting means provided between the first and second ring-shaped members prevents the first and second ring-shaped members from relatively moving in the axial direction, and the first and second piping elements. Is fixed so as not to move relatively.
[0013]
In the invention according to claim 2, the connecting means includes a connecting portion formed integrally with the first and second ring-shaped members, and the first and second ring-shaped members are pivoted by the connecting portion. Relative movement in the direction is prevented.
According to the third aspect of the present invention, the first and second ring-shaped members are prevented from relatively moving in the axial direction by engaging the first and second annular ribs.
[0014]
In the invention according to claim 4, the ring-shaped member is attached to the first piping element. The ring-shaped member in the invention described in claim 4 operates in the same manner as the first ring-shaped member in the invention described in claim 1. The connecting means directly connects the ring-shaped member holding the first piping element to the second piping element.
[0015]
In the invention according to claim 5, the connecting means includes a connecting portion formed integrally with the ring-shaped member and the second piping element, and the ring-shaped member is connected to the second piping element by the connecting portion. Thus, relative movement in the axial direction is prevented.
In the invention according to claim 6, the first and second annular ribs are engaged to prevent the ring-shaped member from moving relative to the second piping element in the axial direction.
[0016]
【Example】
Embodiments of the present invention will be described below with reference to the accompanying drawings. In the embodiment described below, a case in which two pipes 4 and 6 are joined via a pipe joint 2 will be described as in the conventional technique with reference to FIG. In this case, since the pipe 6 is fixed to the pipe joint 2 in the same manner as the pipe 4, an embodiment of the present invention will be described as an example in the case where the pipe 4 and the pipe joint 2 are fixed.
[0017]
A first embodiment will be described with reference to FIGS. The pipe fixing device 10 according to the first embodiment includes an expandable first ring-shaped member 12 having an inner diameter substantially equal to the outer diameter of the pipe 4 as the first piping element, and the second piping element as the second piping element. A second ring-shaped member 14 having an inner diameter substantially equal to the outer diameter of the pipe joint 2 and capable of expanding is provided. The first ring-shaped member 12 has a cutting portion 12i and a slit 12e extending radially outward from the inner peripheral surface 12h on the opposite side of the diameter with respect to the cutting portion 12i, and has a width in the radial direction. The fulcrum part 16a formed narrowly can be expanded from the cutting part 12i. Locking claws 12f and locking protrusions 12g as locking means are disposed at both ends of the first ring-shaped member 12 with the cutting part 12i interposed therebetween. By winding the first ring-shaped member 12 around the tube 4 and engaging the locking claw 12f and the locking projection 12g, the first ring-shaped member 12 is mounted and fixed to the outer peripheral surface of the tube 4. The
[0018]
As shown in the drawing, the first ring-shaped member 12 includes a stretchable portion 12b in which slits 12c extending in the radial direction from the outer peripheral surface and slits 12d extending in the radial direction from the inner peripheral surface 12h are alternately arranged, And a support portion 12a in which the slits 12c and 12b are not provided. The support portion 12 a has an effect of increasing the rigidity of the first ring-shaped member 12. The stretchable part 12b can be stretched in a bellows shape by the slits 12c and 12d. The expansion and contraction of the expansion / contraction part 12b facilitates the mounting of the first ring-shaped member 12 to the tube 4, and the first ring-shaped member 12 absorbs the outer diameter dimensional error of the tube 4 so as to absorb the inner peripheral surface. The tube 4 is securely held so that the tube 4 is tightened in a spring shape in 12h.
[0019]
Similar to the first ring-shaped member 12, the second ring-shaped member 14 extends radially outward from the inner peripheral surface on the diametrically opposite side to the cut portion (not shown). It has a slit 14e (see FIG. 3), and can be expanded from the cutting portion around a fulcrum portion 16b (see FIG. 3) formed narrow in the radial direction. As with the first ring-shaped member 12, locking claws 14f as locking means and locking projections (not shown) are disposed on both ends of the ring-shaped member 14 with the cut portion interposed therebetween. The second ring-shaped member 24 is mounted on the outer peripheral surface of the pipe joint 2 by winding the second ring-shaped member 14 around the pipe joint 2 and engaging the locking claws 14f and the locking projections 14g. Fixed.
[0020]
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 alternately. And a support portion 14a not provided with slits 14c and 14b. The support portion 14 a has an effect of increasing the rigidity of the second ring-shaped member 14. The stretchable part 14b can be stretched in a bellows shape by the slits 14c and 14d. The expansion / contraction part 14b expands / contracts, so that the second ring-shaped member 14 can be easily attached to the pipe joint 2, and the second ring-shaped member 14 absorbs the outer diameter dimensional error of the pipe joint 2. The pipe joint 2 is securely held so that the pipe joint 2 is tightened in a spring shape on the inner peripheral surface 14h.
[0021]
Furthermore, the pipe fixing device 10 includes a connecting portion 17 formed integrally with the first and second ring members as connecting means between the first and second ring-shaped members 12 and 14. The connecting portion 17 prevents the first and second ring-shaped members 12 and 14 from relatively moving in the axial direction. Therefore, the pipe 4 and the pipe joint 2 are fixed so as not to move relatively.
[0022]
Next, a second embodiment of the present invention will be described with reference to FIGS.
Similar to the pipe fixing device 10 according to the first embodiment, the pipe fixing device 30 according to the second embodiment has an inner diameter substantially equal to the outer diameter of the pipe 4 as the first pipe element and can be expanded. A first ring-shaped member 32 and a second ring-shaped member 34 having an inner diameter substantially equal to the outer diameter of the pipe joint 2 as the second piping element and capable of expanding are provided. The first ring-shaped member 32 has a cut portion 32i and a slit 32e extending radially outward from the inner peripheral surface 32h on the opposite side of the diameter with respect to the cut portion 32i, and has a width in the radial direction. The fulcrum part 36 formed narrowly can be expanded from the cutting part 32i. 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 part 32i interposed therebetween. By winding the first ring-shaped member 32 around the tube 4 and engaging the locking claw 32f and the locking projection 32g, the first ring-shaped member 32 is mounted and fixed to the outer peripheral surface of the tube 4. The
[0023]
As shown in the drawing, the first ring-shaped member 32 includes a stretchable portion 32b in which slits 32c extending radially from the outer peripheral surface and slits 32d extending radially from the inner peripheral surface 32h are alternately arranged, And a support portion 32a not provided with slits 32c and 32b. The support portion 32a has an effect of increasing the rigidity of the first ring-shaped member. The stretchable part 32b can be stretched in a bellows shape by the slits 32c and 32d. The expansion / contraction part 32b expands / contracts, so that the first ring-shaped member 32 can be easily attached to the tube 4, and the first ring-shaped member 32 absorbs an outer diameter error of the tube 4 and the inner peripheral surface. The tube 4 is securely held so that the tube 4 is tightened in a spring shape at 32h.
[0024]
Similarly to the first ring-shaped member 32, the second ring-shaped member 34 extends radially outward from the inner peripheral surface on the diametrically opposite side to the cut portion (not shown). It has a slit 34e, and can be expanded from the cut portion around a fulcrum portion (not shown) formed narrow 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 disposed 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 claw 34f and the locking projection 34g, the second ring-shaped member 34 is mounted on the outer peripheral surface of the pipe joint 2, Fixed.
[0025]
As shown in the figure, the second ring-shaped member 34 has a slit 34c extending in the radial direction from the outer peripheral surface and a slit 34d extending in the radial direction from the inner peripheral surface 34h, like the first ring-shaped member 32. It is provided with stretchable parts 34b arranged alternately and support parts 34a where slits 34c and 34b are not arranged. The support portion 34a has an effect of increasing the rigidity of the second ring-shaped member. The stretchable portion 34b can be stretched in a bellows shape by the slits 34c and 34d. The expansion / contraction portion 34b expands / contracts, so that the second ring-shaped member 34 can be easily attached to the pipe joint 2 and the second ring-shaped member 34 absorbs the outer diameter dimensional error of the pipe joint 2 and is thus internally The pipe joint 2 is securely held so that the pipe joint 2 is tightened in a spring shape on the peripheral surface 34h.
[0026]
The pipe fixing device 30 according to the second embodiment includes a first annular rib 32j and a second annular rib as connecting means for connecting the first ring-shaped member 32 and the second ring-shaped member 34 in the axial direction. 34j. As can be understood with particular reference to FIG. 5, the first annular rib 32j protrudes radially outward from the inner peripheral surface 32h of the first ring-shaped member 32, and the second annular rib 34j is the first annular rib 34j. The second ring-shaped member 34 is provided so as to protrude radially inward from the inner peripheral surface 34h. Preferably, the first annular rib 32j is disposed so as to be separated from the first ring-shaped member 32 by a distance substantially equal to the axial width of the second annular rib 34j. When the pipe fixing device 30 is mounted, the pipe 4 and the pipe joint 2 are arranged so that the first and second ring-shaped members 32 and 34 are engaged with the first and second annular ribs 32j and 34j. The engaging claws 32f and 34f are engaged with the engaging protrusions 32g (the engaging protrusions of the second ring-shaped member are not shown). As shown in FIG. 5, when the first and second annular ribs 32j and 34j are engaged, the first and second ring-shaped members 32 and 34 are connected so as not to move relatively in the axial direction. The Therefore, the pipe 4 and the pipe joint 2 are fixed so as not to move relatively.
[0027]
A third embodiment will be described with reference to FIGS. 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 piping element. The ring-shaped member 20 has a cut portion 20i and a slit 20e extending radially outward from the inner peripheral surface 20h on the opposite side of the diameter with respect to the cut portion 20i, and is formed with a narrow width in the radial direction. The fulcrum part 24 can be expanded from the cutting part 20i. Locking claws 20f and locking protrusions 20g as locking means are disposed at both ends of the ring-shaped member 20 with the cutting part 20i interposed therebetween. The ring-shaped member 20 is mounted on and fixed to the outer peripheral surface of the tube 4 by winding the ring-shaped member 20 around the tube 4 and engaging the locking claws 20f and the locking projections 20g.
[0028]
As shown in the figure, the ring-shaped member 20 includes a slit 20c extending radially from the outer peripheral surface thereof, a stretchable portion 20b in which slits 20d extending radially from the inner peripheral surface 20h are alternately arranged, a slit 20c, And a support portion 20a on which 20b is not disposed. 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 / contraction part 20b expands / contracts, so that it becomes easy to attach the ring-shaped member 20 to the tube 4, and the ring-shaped member 20 absorbs the outer diameter dimensional error of the tube 4 so that the tube 4 is formed on the inner peripheral surface 20h. The tube 4 is securely held so as to be tightened in a spring shape.
[0029]
The pipe fixing device according to the third embodiment includes a connecting portion 21 formed integrally 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. The ring-shaped member 20 is directly connected to the pipe joint 22 (see FIG. 8). The connecting portion 21 prevents the ring-shaped member 20 from moving relative to the pipe joint 22 in the axial direction, and the pipe 4 is fixed to the pipe joint 22.
[0030]
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 piping 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 opposite side of the diameter with respect to the cut portion 40i, and is formed to have a narrow width in the radial direction. The fulcrum part 41 can be expanded from the cutting part 40i. Locking claws 40f and locking protrusions 40g as locking means are disposed at both ends of the ring-shaped member 40 with the cutting portion 40i interposed therebetween. By winding the ring-shaped member 40 around the tube 4 and engaging the locking claw 40f and the locking projection 40g, the ring-shaped member 40 is mounted and fixed on the outer peripheral surface of the tube 4.
[0031]
As shown in the figure, the ring-shaped member 40 includes a stretchable portion 40b in which slits 40c extending in the radial direction from the outer peripheral surface, and slits 40d extending in the radial direction from the inner peripheral surface 40h, and slits 40c, And a support portion 40a on which 40b is not disposed. The support portion 40a has an effect of increasing the rigidity of the ring-shaped member. The stretchable part 40b can be stretched in a bellows shape by the slits 40c and 40d. The expansion and contraction of the expansion / contraction part 40b facilitates the mounting of the ring-shaped member 40 to the tube 4, and the ring-shaped member 40 absorbs the outer diameter error of the tube 4 so that the tube 4 is formed on the inner peripheral surface 40h. Tighten it in a spring shape and hold it securely.
[0032]
The pipe fixing device according to the fourth embodiment includes 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 understood with particular reference to FIG. 10, the first annular rib 40 j protrudes radially outward from the inner peripheral surface 40 h of the ring-shaped member 40, and the annular groove 42 j is near the end of the pipe joint 42. It is formed on the outer peripheral surface. When the pipe fixing device 30 is mounted, the ring-shaped member 40 that has been expanded is wound around the pipe 4 and the pipe joint 2 so that the annular rib 40j fits into the annular groove 42j, and the locking claw 40f and the locking projection. Engage with 40g. As shown in FIG. 5, when the annular rib 40j is fitted in the annular groove 42j, the ring-shaped member 40 and the pipe joint 42 are connected so as not to move in the axial direction relatively. Accordingly, the pipe 4 is fixed to the pipe joint 42.
[0033]
Although four embodiments have been described as preferred embodiments of the present invention, it is understood by those skilled in the art that the present invention is not limited to these embodiments and can be improved and modified without departing from the spirit and scope thereof. It is a natural place.
For example, although the embodiment of the present invention has been described by taking the pipe and the pipe joint as examples of the first and second piping elements, the first and second piping elements may be, for example, a T joint or an elbow joint.
[0034]
In the above-described embodiments, the ring-shaped member has been described as including the expansion / contraction portion and the support portion. However, the support portion is merely an element for increasing the rigidity of the pipe fixing device, and is an essential element of the present invention. Absent. That is, the ring-shaped member can be configured without providing the support portion depending on the shape, size, or material of the ring-shaped member. Moreover, the fulcrum part provided in the support part is for facilitating the expansion of the ring-shaped member, and is not an essential element of the present invention. That is, the ring-shaped member can be expanded without providing a fulcrum portion depending on the shape, size, or material of the ring-shaped member.
[0035]
In the embodiment, the locking means has been described as including a locking claw and a locking projection. For example, the locking means is provided with a pair of locking projections at both ends of the ring-shaped member, You may comprise by the separate locking member which can be engaged with a locking protrusion.
[0036]
In the above-described embodiments, it has been described that the ring-shaped member is simply formed so as to be expandable. However, the ring-shaped member may be formed of an elastic material made of a plastic material such as polyethylene, polyptenene, or polypropylene, or a flexible metal material. it can.
[0037]
【The invention's effect】
As is apparent from the above description, according to the present invention, there is provided a pipe fixing device that can reliably hold two pipe elements so as not to move relatively. Since this piping fixing device can be formed at low cost from flexible plastic or metal, it is not necessary to remove the piping element from the piping element after it is joined by electric fusion or adhesive, and it is embedded together with the piping element. can do.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view of a first embodiment.
FIG. 2 is a partial cross-sectional view of the first embodiment.
3 is a rear view seen in the direction of arrow line III in FIG. 1. FIG.
FIG. 4 is a schematic perspective view of a second embodiment.
FIG. 5 is a partial cross-sectional view of a 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 arrow line IIIV in FIG. 6;
FIG. 9 is a schematic perspective view of a fourth embodiment.
FIG. 10 is a partial cross-sectional view of a fourth embodiment.
FIG. 11 is a schematic view for explaining an electrofusion method.
FIG. 12 is a conventional pipe fixing device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Pipe fixing device 12 ... 1st ring-shaped member 12b ... Expansion-and-contraction part 12f ... Locking claw 12g ... Locking protrusion 14 ... 2nd ring-shaped member 14b ... Expansion-and-contraction part 14f ... Locking claw 14g ... Locking protrusion 16 ... fulcrum

Claims (6)

In the piping fixing element for positioning and fixing the first piping element and the second piping element,
A first ring-shaped member having an inner diameter substantially equal to the outer diameter of the first piping element end and formed to be expandable by an elastic member; and an inner diameter substantially equal to the outer diameter of the second piping element end. A second ring-shaped member 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; A pipe fixing device comprising: locking means for connecting both ends of an opened ring-shaped member; and connecting means for connecting the first and second ring-shaped members so as not to move relative to each other in the axial direction. The piping fixing device according to claim 1, wherein the connecting means includes a connecting portion formed integrally with the first and second ring-shaped members between the first and second ring-shaped members. The connection means is engaged with the first annular rib extending radially inward in the second ring-shaped member and the first annular rib provided to extend radially outward in the first ring-shaped member. The piping fixing device according to claim 1, further comprising a second annular rib provided to do so. In the piping fixing element for positioning and fixing the first piping element and the second piping element,
A ring-shaped member having an inner diameter substantially equal to the outer diameter of the first pipe element end and formed to be expandable by an elastic member;
The ring-shaped member 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 both ends of the expanded ring-shaped member. A pipe fixing device comprising locking means for fastening, and connection 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. The pipe fixing device according to claim 4, wherein the connecting means includes a connecting part formed integrally with the ring-shaped member and the second pipe element between the ring-shaped member and the second pipe element. The connecting means is provided so as to extend radially outward in the ring-shaped member, and to extend radially inward in the second piping element so as to engage with the first annular rib. The pipe fixing device according to claim 4, further comprising a second annular rib formed.

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