KR100251619B1 - The connecting device of the corrugated pipe - Google Patents

Abstract

A seam for a corrugated pipe with alternating peaks and valleys is disclosed. The body of the seam has a through hole and one end thereof is provided as an inlet. The annular accommodating indentation part and the annular fastening part which were formed in turn toward this entrance are formed in the inner periphery of the main body. The main body accommodates a cylindrical support member. The support member is exerted a force in the inlet direction by a spring. An end portion of the inlet side of the support member is provided as a support port, and an annular engaging member is mounted on the outer periphery of the support member in an elastically expanded state. When the distal end of the corrugated pipe inserted at the inlet pushes the support member away from the inlet against the spring, the coupling member is pulled out of the support of the support member and reduced in diameter to fit snugly into the periphery of the corrugated bone. The portion protruding from the outer periphery of the corrugated tube of the corrugated tube is fastened to the fastening portion of the main body while the coupling member is properly fitted.

Description

Corrugated pipe fittings

1 is a longitudinal cross-sectional view showing a state before connecting a joint according to the present invention to a corrugated pipe.

2 is a longitudinal sectional view showing a state after connecting the joint of the present invention to a corrugated pipe.

3 to 6 are front views showing different forms of the coupling member.

7 to 10 are cross-sectional views of main parts of joints forming different forms of the present invention.

Figure 11 is a front view showing a state in which the coupling member of the other form attached to the slider.

12 is a side view showing the natural state of the coupling member shown in FIG.

* Explanation of symbols for main parts of drawings

A: joint 10: corrugated pipe

20: body 21, 23: barrel

25, 26, 27: sealing member 30: slider

40: coil spring 50: spring support

60: coupling member

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corrugated pipe fitting that can easily connect a corrugated pipe used for gas supply.

Japanese Utility Model Publication No. Hei 3-52493 discloses a joint that can be easily connected by simply inserting a corrugated pipe.

In detail, the main body of this fitting port is provided with the through-hole in which one end is provided as an entrance. The through-holes are formed with annular first and second accommodating recesses axially separated from the inlet in order. The first accommodating part accommodates an annular coupling member which connects both ends of the coil spring, and the second accommodating part accommodates an annular sealing member. The side of the two side which partitions a 1st accommodating part is tapered, and the other side is orthogonal to a shaft center. These coupling members and sealing members are attached to the main body in advance before connecting the corrugated pipe.

When the distal end of the corrugated pipe is inserted from one side of the through hole, every wound portion of the coupling member is deformed from circular to oval whenever the acid portion of the corrugated tube passes through the coupling member. Return to the original prototype. Repeating this several times, the corrugated pipe enters more deeply and the tip of the corrugated pipe is inserted into the sealing member. The tip of the corrugated pipe touches the end formed in the main body to prevent further entry. In this way, the corrugated pipe is connected to the joint, and the corrugated pipe and the main body are sealed by being in close contact with the outer periphery of the corrugated pipe in an elastically deformed state. When drawing force is applied to the corrugated pipe, a force is exerted from the inclined surface of the corrugated pipe to the engagement member in the radially outward direction thereof, but the force in the radially inward direction from the tapered surface of the first accommodating insert, ie Since the force to be pushed back to the valleys of the corrugated pipe is given, the coupling member is deformed into an elliptical shape and the crossing of the corrugated pipe is prevented.

However, the joint of Japanese Utility Model Publication No. Hei 3-52493 had the following drawbacks.

Since the coupling member is only accommodated in the first accommodating part, the coupling member is dropped from the joint even when a relatively small impact is applied to the joint during the delivery of the joint to which the coupling member is mounted on the main body at the factory. . In addition, when the corrugated pipe is inserted, the coupling member passes over the peak portion of the corrugated pipe by elastic deformation of each wound portion, so that the coupling member receives a force directed from the inner circumferential surface of the first accommodating inlet to the bone portion, so that the insertion resistance is large.

On the other hand, in the joint shown in FIGS. 3 and 4 or the joint shown in FIGS. 5 and 6 of Japanese Utility Model Laid-Open No. 3-91592, the through hole of the main body has an annular accommodating recess in which the inner peripheral surface is tapered. The accommodating indentation portion is provided with a sealing member and an annular engaging member having a tapered outer circumferential surface in advance. The coupling member is formed in an annular shape by joining both ends of the coil spring, and the sealing member is fixed to the end when the sealing member is molded. The sealing member is exerted by the other coil spring toward the inlet of the through hole.

In the joint of such a configuration, when the corrugated pipe is inserted into the through hole of the main body, the corrugated pipe is brought into contact with the engaging member at the uppermost end to move the engaging member and the sealing member into the accommodation recess. When the sealing member touches the inner end of the receiving concave portion and enters the corrugated tube further in a state where the movement is restricted, the tip of the corrugated tube passes through the coupling member and is inserted into the sealing member. The coupling member elastically expands in diameter each time the acidic portion of the corrugated pipe passes, and the diameter decreases after the acidic portion passes and fits snugly into the valley portion. Then, when the operator removes the corrugated pipe, the sealing member, the coupling member, and the corrugated pipe are moved in the opposite direction to the insertion direction by the force of the coil spring so that the outer circumferential surface of the sealing member is in contact with the inner circumferential surface of the receiving recessed taper. The body and corrugated pipe are sealed. In addition, the engaging member restrains the corrugated tube from being pulled out by contacting a fastening surface that forms a taper formed at the inlet of the through hole while being fitted into the valley portion of the corrugated tube.

However, in the joint of Japanese Patent Application Laid-Open No. 3-91592, there is a change in the insertion resistance every time the coupling member crosses the corrugated pipe, but the operator could not clearly confirm the end of the connecting work of the corrugated pipe.

An object of the present invention is to connect the corrugated pipe simply and smoothly, and to reliably suppress the corrugated pipe from escaping, to prevent the coupling member from falling off from the main body before the corrugated pipe is connected, and to clearly connect the corrugated pipe. It is to provide a joint that can be recognized by the operator.

The present invention for achieving the above object is a joint for a corrugated pipe having alternating peaks and valleys, (a) provided with a through hole, one end of the through hole is provided as an inlet for insertion of the corrugated pipe, On the inner circumference of the through hole, a main body in which an annular receiving recess and an annular fastening portion are formed in turn toward the inlet is formed, and (b) an end portion of the inlet side is formed in a cylindrical shape while being accommodated in the main body. And (c) a spring for positioning the support member of the support member at a position opposed to the inner circumferential surface of the accommodation recess, by (c) pushing the support member toward the inlet, and (d) forming an annular shape of the support member. It is mounted on the outer periphery of the supporting part in an elastically expanded state, and the front end of the corrugated pipe inserted at the inlet faces the support member against the spring. When pushed away from the inlet end of the support member of the support member is reduced in diameter and fits snugly to the outer periphery of the corrugated tube of the corrugated tube, in this state is coupled to the fastening portion of the main body to prevent the corrugated tube from coming out The fitting is characterized by having a member.

Hereinafter, the joint A of the first embodiment of the present invention will be described with reference to FIGS. 1 and 2. First, the gas pipe B (FIG. 2) connected to the fitting port A will be described. The gas pipe B is made of metal and has a thin corrugated pipe 10 having alternating the peak portion 10a and the valley portion 10b. And a protective tube 11 made of resin covering the outer side of the corrugated pipe 10. The gas pipe B can be easily bent by human force.

The fitting port A is provided with the main body 20, and this main body 20 is comprised by connecting two metal cylinders 21 and 23 made of metal. One cylinder 21 has a through hole 22 extending in the axial direction. This through hole 22 is enlarged in diameter toward the right in the drawing in steps. Specifically, the through hole 22 has five inner circumferential surfaces and four stages of different diameters. Here, the signs 22a, 22b and 22c are attached to the third, fourth and fifth inner circumferential surfaces from the left, respectively. In the first, second, and third stages, reference signs 22d, 22e, and 22f are attached. The screw 21x is formed in the 4th inner peripheral surface 22b. On the outer circumferential surface of the left end of the cylinder 21, a taper screw 21y for connecting to the gas mechanism is formed.

The other cylinder 23 has a through hole 24 extending in the axial direction. The right end 24x of this through hole 24 is provided as an inlet for insertion of the gas pipe B. As shown in FIG. On the inner circumferential surface of the through hole 24, two accommodation recesses 24a and 24b are formed, which are arranged in sequence from the inlet 24x and axially separated from each other. Each of these accommodating recesses 24a and 24b contains an annular sealing member 25 or 26 made of soft rubber.

The annular flange 25a which protrudes in the inner direction of the radial direction is formed in the inner peripheral part of the center part of the sealing member 25 of the right side. The inner diameter of the flange 25a of the sealing member 25 is smaller than the outer diameter of the protective tube 11 of the gas pipe B, and the inner diameter of the other part is larger than the outer diameter of the protective tube 11.

The sealing member 26 on the left side has a data surface 26a at both ends, and the inner circumferential surface of the intermediate portion forms a cylindrical surface. The inner diameter of the intermediate portion of the sealing member 26 is smaller than the outer diameter of the peak portion 10a of the corrugated pipe 10 and larger than the outer diameter of the valley portion 10b. A screw 23x is formed on the outer circumference of the left end of the cylinder 23.

The pair of cylinders 21 and 23 described above are connected in a coaxial manner by engaging the screws 21x and 23x with each other. In this connection state, the sealing member 27 which seals both is arrange | positioned between the inner peripheral surface 22c of the right end part of the cylinder 21, and the outer peripheral surface of the cylinder 23. As shown in FIG.

An annular receiving recess 28 is formed by the inner circumferential surface 22b, the end 22f of the cylinder 21, and the front end surface 23a of the cylinder 23. Moreover, the fastening surface 29 (fastening part) of the mirror which forms a taper adjacent to the front end surface 23a of the cylinder 23 is formed. The inner diameter of this fastening surface 29 becomes smaller gradually toward the inlet 24x.

The inner circumferential surface 22a of the cylinder 21 is provided as a guide for slidably guiding the metal slider 30 (support member). The slider 30 has a cylindrical base portion 31, an annular flange 32 formed on the inner circumference of the base portion 31, and an axial right direction (inlet 24x) at the base portion 31. Direction) and a cylindrical support part 33 projecting in the direction) and an annular projection 34 formed on the outer periphery of the right end of the support part 33.

The outer diameter of the base portion 31 is formed to be about 10 µm to 50 µm smaller than the inner diameter of the guide portion 22a. Silica oil or grease is interposed in some gaps between the two to reduce frictional resistance between them. The outer diameter of the support part 33 is smaller than the base part 31, and the stage 35 is formed in both. Moreover, the contact surface 36 (abutting part) which forms a taper is formed in the inner periphery of the site | part separated from the right end of the support part 33 by a predetermined distance. The diameter at the contact surface 36 gradually increases toward the right direction. On the contact surface 36, a coating layer 36a made of flexible resin or the like is formed to a thickness of about 50 µm to 150 µm.

The slider 30 has a force applied to the right direction (inlet 24x direction) by the coil spring 40 in the compressed state. The left end of the coil screen 40 is in direct contact with the end 22d of the barrel 21, and the right end is in contact with the flange 32 of the slider 30 through the spring support 50.

The spring support 50 is formed of a material of low frictional resistance, such as fluororesin and polyacetal resin. The spring support 50 has an annular base 51 extending in a direction orthogonal to the axis center of the main body 20, a cylindrical portion 52 extending in a right direction from the inner circumference of the base 51, and the base 51. A cylindrical portion 53 extending in the left direction from the outer circumferential edge thereof and an annular protrusion 54 formed on the right side of the base 51 are provided. The protrusion 54 is in contact with the flange 32 of the slider 30 to transmit the force of the coil spring 40 to the slider 30. The cylindrical portion 52 is accommodated in the flange 32 and its outer diameter is slightly smaller than the inner diameter of the flange 32.

In addition, the fitting A has an annular engaging member 60 formed by connecting both ends of the coil spring. In the state before the coupling member 60 is inserted into the fitting hole A of the gas pipe B, as shown in FIG. 1, the coupling member 60 is mounted on the outer periphery of the support part 33 of the slider 30. It is accommodated in the accommodation recess 28. In this mounting state, the coupling member 60 is elastically expanded in diameter. In addition, although the slider 30 is pushed to the right by the force of the coil spring 40, since the coupling member 60 is interposed between the end 35 and the front end surface 23a of the cylinder 23, the slider is Rightward movement of (30) is regulated. In this state, the support part 33 of the slider 30 is arrange | positioned facing the inner peripheral surface 22b of the accommodation recessed part 28, and is blocking the storage recessed part 28. As shown in FIG. The diameter D of the coupling member 60 is smaller than the distance between the inner circumferential surface 22b of the accommodation recess 28 and the outer circumferential surface of the support 33 of the slider 30.

In the fitting hole A of the above configuration, as shown in FIG. 1, the coupling member 60 is accommodated in the accommodation recess 28 of the main body 20 and at the same time the slider 30 is blocking the accommodation recess 28. Since it is attached to the outer circumference of the support portion 33 of the can be surely prevented that the coupling member 60 is dropped.

The joint A is attached to the gas appliance by inserting a taper screw 21y into a screw hole of a gas appliance such as a gas cock, a header, and a cheese head in advance. In this state, the end of the gas pipe B is connected to the fitting port A. FIG. At the end of the gas pipe B, the protective tube 11 is cut in advance in the cross section by a predetermined length, and the end of the corrugated pipe 10 is exposed.

When the end of the corrugated pipe 10 is inserted from the inlet 24x of the fitting hole A, the inclined surface of the first mountain portion 10a touches the contact surface 36 of the slider 30. In this state, the right end of the supporting part 33 of the slider 30 is located in the position corresponding to the peak part 10a of the corrugated pipe 10.

Further entering the corrugated pipe 10 further moves the slider 30 to the left against the force of the coil spring 40. At this time, the supporting portion 33 of the slider 30 is separated from the receiving concave portion 28, but the coupling member 60 is provided on the end 22f of the main body 20, that is, the side of the receiving concave portion 28. Movement to the left direction is thereby prevented. As a result, the coupling member 60 is released from the support portion 33 and the diameter is reduced by the elastic force and the impact sound remains at the moment that fits snugly into the valleys 10b of the corrugated pipe 10 and at the same time the vibration according to the impact Since it is transmitted to the operator's hand through the corrugated pipe 10, the operator can clearly recognize that the coupling between the coupling member 60 and the corrugated pipe 10 is completed, and furthermore, the connection of the corrugated pipe 10 and the joint A is completed. Can be. In addition, the coupling member 60 may be in a natural state or may be in a state in which the diameter is elastically expanded in a state where the corrugated pipe 10 fits snugly into the valley portion 10b.

When the coupling member 60 is released from the support 33, the coupling member 60 must be further extended to pass over the projection (34). At this time, the insertion resistance of the corrugated pipe 10 temporarily increases. After the coupling member 60 fits over the valley portion 10b of the corrugated pipe 10 beyond the protrusion 34, the insertion resistance is rapidly decreased. The operator can clearly recognize that the coupling between the coupling member 60 and the corrugated pipe 10 is completed even by the change of the insertion resistance.

In addition, the insertion depth of the corrugated pipe 10 is regulated by the left end of the slider 30 touching the end 22e of the main body 20. When the operator removes the corrugated pipe 10, the slider 30 and the corrugated pipe 10 are returned to the right direction by the force of the coil spring 40, and the coupling member 60 is formed at the distal end of the barrel 23. ) Is fastened. Therefore, even if the corrugated pipe 10 is pulled to the right direction, the corrugated pipe 10 can be prevented from falling out from the joint A. FIG. When the corrugated pipe 10 is pulled in the right direction, the inclined portion of the corrugated pipe 10 exerts a radially outward force on the coupling member 60, but the coupling member 60 is radial in the fastening surface 29. Since the force in the inward direction is applied, it is possible to reliably prevent the elastic expansion.

In the connected state of the gas pipe B to the fitting hole A, the flange 25a of the sealing member 25 is in contact with the outer circumferential surface of the protective tube 11 of the gas pipe B in an elastically deformed state, and the corrugated pipe 10 Since the sealing member 26 is in contact with the deformed portion 10a in the state of being elastically deformed, sealing between the main body 20 and the gas pipe B can be performed. In addition, by using the slider 30, the sealing effect can be further enhanced. In detail, the outer peripheral surface of the base part 31 of the slider 30 is in contact with the inner peripheral surface of the guide part 22a of the main body 20, and the inclined surface of the edge part of the corrugated pipe 10 is the contact surface 36 of the slider 30. It spans the whole circumference. For this reason, the amount of gas leaking toward the sealing members 25 and 26 is very small, and this minute amount of gas can reliably prevent leakage with these sealing members 25 and 26. Moreover, since the coating layer 36a is formed in the contact surface 36, a sealing effect can be heightened further.

In particular, even when a fire or the like occurs and the sealing members 25 and 26 are lost or deteriorated, the metallic body 20, the slider 30, the coil spring 40, and the corrugated pipe 10 are not lost but are in contact with each other. As it can maintain the state, it can prevent the leakage of a large amount of gas and prevent the expansion of the fire from the gas leak.

By turning the main body 20, the fitting port A can be detached from the gas appliance or reattached as it is in contact with the gas pipe B. At this time, since the frictional resistance between the slider 30 and the guide part 22a and the frictional resistance between the slider 30 and the coil spring 40 are very small, the main body 20 can be easily turned. In addition, the frictional resistance between the contact surface 36 of the slider 30 and the corrugated pipe 10 is determined by the frictional resistance between the slider 30 and the guide portion 22a and the frictional resistance between the slider 30 and the coil spring 40. Greater than the sum For this reason, the slider 30 does not rotate together at the time of rotation of the main body 20, and has the following advantages. In other words, the end of the corrugated pipe 10 is not completely circular but slightly crushed. Since the coating layer 36a of the slider 30 is opposed to the end of the corrugated tube 10 by the force of the coil spring 40, the surface of the coating layer 36a is slightly uneven, corresponding to the end shape of the corrugated tube 10. Is formed. Therefore, when the slider 30 rotates with respect to the corrugated pipe 10, a slight gap is formed in the coating layer 36a and the corrugated pipe 10 due to a mismatch between the end shape of the corrugated pipe 10 and the surface shape of the coating layer 36a. There is a possibility. However, as described above, since the slider 30 does not rotate with respect to the corrugated pipe 10, this possibility can be eliminated and a better sealing state can be ensured.

Instead of the coupling member used in the above embodiment, the loosening member of FIGS. 3 to 6 may be used. In detail, the coupling member 160 of FIG. 3 is constituted by a circular elastic ring cut in part. The coupling member 260 of FIG. 4 is a circular elastic ring with a part cut off, and has a curved portion 260a projecting outward at intervals of 90 °.

In a state where the coupling member 260 fits snugly into the valley portion 10b (FIG. 2) of the corrugated pipe 10, the curved portion 260a contacts the fastening surface 29. The coupling member 360 of FIG. 5 is provided with the coil spring 361 which connected the both ends, and the thin elastic ring 362 which the part accommodated in this coil spring 361 cut | disconnected. The coupling member 460 of FIG. 6 includes a coil spring 461 connected to both ends, another coil spring 462 accommodated in the coil spring 461 and connected to both ends, and a part accommodated in the coil spring 462. Has a thin elastic ring 463 cut out. The diameter of the wound portion of the coil spring 462 is smaller than the diameter of the wound portion of the coil spring 461.

These coupling members 160, 260, 360, 460 are all made of metal, and are elastically expanded in the state of being mounted on the outer periphery of the supporting portion 33 (first, second degree) of the slider 30, When it fits snugly into the valley part 10b of the corrugated pipe 10, it exists in the state of a natural state or the state expanded elastically.

Other embodiments of the present invention joint will be described below. In each embodiment, components corresponding to the preceding embodiments are denoted by the same reference numerals in the drawings, and description thereof is omitted.

An annular fastening surface 129 (fastening portion) is formed at the end of the cylinder 23 of the joint shown in FIG. 7 at a position away from the front end surface 23a. This fastening surface 129 is orthogonal to the axis of the main body 20. The inner surface of the cylinder 23 located between the fastening surface 129 and the tip surface 23a is provided as the holding portion 125. The inner diameter of the holding portion 125 is equal to or slightly larger than the outer diameter of the coupling member 60 that fits snugly into the valley portion 10b of the corrugated pipe 10. In this embodiment, when the corrugated pipe 10 is pulled to the right in the connected state, the coupling member 60 is fastened to the fastening surface 129 in a state accommodated in the holding part 125, so that the corrugated pipe 10 is pulled out. Suppressed. At this time, the coupling member 60, but the corrugated pipe 10 receives the force in the radial direction in the radial direction by the inclined surface, it can be forbidden that the coupling member 60 is expanded elastically by the holding portion 125, the corrugated pipe It is prevented that it exceeds the mountain part 10a of (10). Thereby, it can suppress more reliably that the gas pipe B escapes.

The joint shown in FIG. 8 is substantially the same as the joint of FIG. 7, but uses a fastening surface 229 that forms a tape instead of the fastening surface 129 of FIG.

In the joint shown in FIG. 9, the annular contact surface 336 of the slider 30 is orthogonal to the axis of the main body, and the contact surface 336 has a coating layer 336a having a thickness of about 100 to 200 µm made of a flexible resin. Formed. The tip circumference of the corrugated pipe 10 touches the contact surface 336 of the slider 30 over the entire circumference to maintain a good sealing state.

In the joint shown in FIG. 10, an annular contact portion 436 is formed on the inner circumference of the support part 33 of the slider 30 to form a thin spring shape of about 0.1 mm to 0.3 mm at a position away from the right end by a predetermined distance. have. The contact portion 436 is orthogonal to the shaft center of the main body 20 in its natural state, and is sealed by contacting the tip portion of the corrugated pipe 10 over its entire circumference while elastically deforming. The spring bearing 450 is formed of a metal and has an annular protrusion 455 on the right end surface thereof, and the protrusion 445 contacts the contact portion 436 of the slider 30 so that The amount of elastic deformation is regulated. In this embodiment, the front end surface 423a of the cylinder 23 is provided as a fastening surface for the engaging member 60.

In addition, as shown in Figs. 11 and 12, the coupling member 560 may be formed. That is, the coupling member 560 is formed by bending the coil spring in a circular shape, and both ends thereof are not connected to each other, so that they overlap as shown in FIG. 12 in a natural state. In the state where the coupling member 560 is mounted on the outer circumference of the base 33 of the slider 30, both ends thereof are separated as shown in FIG. The coupling member 560 is in contact with the outer circumferential surface of the bone portion 10b with its elastic force in the state where both ends thereof are separated and the diameter is elastically expanded even when the coupling member 560 fits snugly into the valley portion 10b of the corrugated pipe 10. Since the coupling member 560 is not connected to both ends, the manufacturing cost is low.

The present invention is not limited to the above embodiments, and various forms are possible. For example, it is applicable also when the main body of a gas appliance also serves as the main body of a joint.

Claims (15)

A splice for a corrugated pipe having alternating peaks and valleys, comprising: (a) a through hole, one end of the through hole being provided as an inlet for insertion of the corrugated pipe, the inner circumference of the through hole being turned toward the inlet; An annular accommodating indentation portion formed as described above; (b) a supporting member which is formed in the tubular shape while being accommodated in the main body and whose end portion on the inlet side is provided as a supporting portion; and (c) the support. A spring for pushing the member toward the inlet to position the support of the support member at a position opposite the inner circumferential surface of the accommodation recess, and (d) an almost annular shape and an elastically extended diameter to the outer periphery of the support of the support member. And the tip of the corrugated pipe inserted at the inlet pushed the support member away from the inlet against the spring. When the diameter of the support member of the support member at the end of the end portion is reduced to fit into the outer periphery of the valley of the corrugated tube, in this state is provided with a coupling member for suppressing the escape of the corrugated tube by being fastened to the fastening portion of the main body Corrugated pipe fittings. The corrugated pipe fitting according to claim 1, wherein the inlet side end of the support port of the support member is located at the top of the corrugated pipe when the tip of the corrugated pipe pushes the support member. The corrugated pipe fitting according to claim 1, wherein an annular protrusion extending in the radially outward direction is formed at the inlet side end of the support portion. The corrugated pipe fitting according to claim 1, further comprising a fastening surface which forms a tapered tapered portion of the through hole toward the inlet. The holding portion according to claim 1, wherein the accommodation penetration portion and the fastening portion are separated from each other, and the holding portion for preventing the expansion of the diameter while accommodating the engaging member that fits snugly in the valley portion of the corrugated pipe located between the inner circumference of the through hole. Corrugated pipe fittings, characterized in that provided as. 2. An inner circumference of a portion of the through hole located on the opposite side of the inlet from the accommodation inlet as a guide portion, and the support member has a base portion whose outer circumference is in contact with the inner circumference of the guide portion. Corrugated pipe fittings characterized in that. 7. The position of the supporting member according to claim 6, wherein an outer diameter of the supporting portion of the supporting member is smaller than the base portion, and a stage is formed between the two ends, and the end of the supporting member contacts the side of the inlet side of the accommodation recess through the coupling member. A corrugated pipe fitting characterized by the determination being made. The corrugated pipe fitting according to claim 6, wherein the support member has an annular contact portion, and the tip end portion of the corrugated tube is in contact with the entire circumference. The corrugated pipe fitting according to claim 8, wherein the main body, the support member, the spring, and the corrugated pipe are made of metal. The corrugated pipe fitting according to claim 8, wherein the contact portion of the support member has an inclined surface, and the inclined surface of the corrugated pipe is in contact with the inclined surface. The corrugated pipe fitting according to claim 8, wherein a flexible coating layer is formed on a surface where the tip of the corrugated pipe contacts the contact portion of the support member. The corrugated pipe fitting according to claim 11, further comprising a spring support port having a small coefficient of friction, the spring support port being interposed between the spring and the support member. The corrugated pipe fitting according to claim 8, wherein the contact portion of the support member has an annular plate spring shape that is elastically deformable. According to claim 1, wherein the coupling member is a coil spring bent in an annular shape in a natural state, the coil spring is mounted on the outer periphery of the support portion of the support member and both ends thereof in the state inserted into the valley of the corrugated pipe A corrugated pipe joint characterized in that the diameter is elastically expanded in a separated state. The corrugated pipe fitting according to claim 1, wherein the coupling member is provided with an elastic ring cut in part and a coil spring surrounding the elastic ring in a state where both ends thereof are connected.