CN101382220B - Joint for corrugated tube - Google Patents

Abstract

The invention relates to a joint for a corrugated pipe, which can reliably insert the corrugated pipe into a stated position. The joint (1) for the corrugated pipe comprises: a joint body (10) provided with a through hole (16) for inserting the corrugated pipe (T), a press nut (20) which can slide in the inside direction of the through hole (16) and one end of which is inserted with the through hole (16), an annular stoppage component (50) one end of which forms a plurality of partition parts (53), a restraining component (30) forming a projecting part (31) inserted on the partition parts (53), a sealing component (40) on the outer peripheral face of the sealed corrugated pipe (T), an elastic component (70) kept in a compressed state, and a movable component (80) pressed by the front end of the corrugated pipe (T) and sliding in the inside direction of the through hole (16). When the movable component (80) pressed by the corrugated pipe (T) can slide in the inside direction of the through hole (16), the compressed state of the elastic component (70) is opened, so that the projecting part (31) inserted with the partition parts (53) is released.

Description

Joint for corrugated tube

Technical field

The present invention relates to the joint for corrugated tube that a kind of connection is used for the bellows of gas supplying tubing etc., particularly relate to the sealability of long-term use and the improvement of application property.

Background technique

Generally in gas supplying tubing such as city gas, see widely-used rivulose by metal bellows flexible pipe that constitutes and the joint for corrugated tube that is connected them from viewpoints such as its application properties.For example in patent documentation 1, record such joint for corrugated tube as joint for corrugated tube, it has: the endoporus with the end of inserting bellows reaches the main body of the joint that is connected with other pipe arrangements; Block the only guard ring of bellows through the claw in the annular recessed portion of inserting the bellows outside; With the sealing mechanism that seals between bellows and the main body; Can engage and end with the ripple pipe clamp guard ring pressure cylinder of the state locking guard ring on main body slidably at specific sliding position with respect to main body.

In addition; In patent documentation 2, be logged into: bellows is inserted in the adapter body, and each pin of annular convex conflict stopper is then respectively sold inwards side direction and is toppled over and resiliently deformable; It is inboard that annular convex surpasses stopper, then the pin of stopper and respectively cut apart circumference sheet involution reset condition.Patent documentation 2 discloses through this effect the operating personnel who inserts bellows is obtained through sense through sound and/or thoughts and feelings.

In addition, in patent documentation 3, record the flexible Pipe joint that constitutes by following structure: main body with pad container; Be equipped with through the front end of flexible pipe (bellows) and meet on this pad container and the pad of side shifting inwards, have towards the taper inner peripheral surface of receiving port undergauge and be screwed into the nut in the main body; Integrally formed and front end has the sleeve of the roughly tubular of a plurality of card claw stops with pad; To stop side shifting inwards and to enlarge the state of cutting and be installed in the guard ring on the end periphery of sleeve; Have towards the taper outer circumferential face that receives the oral-lateral undergauge and be installed in the back-up ring parts between the card claw stop of sleeve respectively; Be installed in the pressure spring between guard ring and the back-up ring with compressive state.

Patent documentation 1: the spy opens communique 2004-No. 316733

Patent documentation 2: the spy opens communique 2007-No. 113591

Patent documentation 3: the spy opens flat 7-No. 110087 communiques

But disclosed joint for corrugated tube in the patent documentation 1 and 2 is because with the inner face of the joint of annular seal material seal tubular and the front end periphery of bellows, so the roundness of bellows front end has direct influence to sealability.Promptly; The bellows front end for example is flat with ellipticity; Then reduce in the short time because of the low sealability of sealing surface pressure drop in minor axis portion; In addition, press at the length-diameter part sealing surface and to be raised to necessary above and can in long-term, sealing material to be occurred permanent crooked, can cause the sealability reduction because of the deterioration of the elastic force of sealing material.Therefore, be necessary the flat amount of bellows at the construction field (site).

In addition,, also have to design the internal diameter of the sealing material of ring-type littler, need very big insertion force than the external diameter of bellows in order to tackle flat tube.And the operating personnel distinguishes that the feel that feel and the stopper effect of bellows through the interior week of the sealing material of ring-type produced is difficult.Therefore, can not be inserted at bellows in fact and feeling under the situation of the assigned position of joint that construction accomplishes and finish construction, thereby cause bad phenomenon such as leakage.

In addition; Flexible Pipe joint according to patent documentation 3; Outer circumferential face through flexible pipe before the inboard end of the front end butt pad of flexible pipe make pad in hole enlargement to compression; So be difficult to sometimes pipe insertion force through the operating personnel make pad to the inboard of adapter body move or the front end of flexible pipe arrive the inboard end of pad before pad move, thereby can damage the connection reliability of flexible pipe.

Summary of the invention

The present invention is effective solution of the above problems that is intended to of researching and developing in view of the above problems.That is, even provide a kind of bellows how much to be flat or distortion arranged, joint for corrugated tube that also can the long term maintenance sealability.In addition, the object of the invention is to provide a kind of bellows can reliably be inserted into assigned position and can be by the joint for corrugated tube of operating personnel's identification.

Joint for corrugated tube of the present invention has: adapter body, and it has the through hole that inserts bellows; Push nut, the one of which end inserts said through hole, and can endwisely slipping at this through hole; Guard ring, the one of which end is pushed by said push nut, the other end is formed with a plurality of segmentations, its front end is formed with that paddy portion with said bellows fastens can be scalable claw; Constraint component, it has the slip limting mechanism of the slip of the said push nut of restriction, and card ends in said through hole; Sealed member, it seals the outer circumferential face of said bellows; Elastic member, its said through hole axially on capable of expansion and contraction; Holding member and movable member; It keeps said elastic member with compressive state, the front end of the said bellows that is inserted into said movable member inwards side direction push, thereby make the compressive state of said elastic member open; Follow the elongation of said elastic member; Said sealed member is compressed in the axial direction, and the slip limting mechanism of said constraint component is disengaged, and said push nut becomes and can slide.

According to such structure; So the front end of bellows arrives before the movable member owing to almost do not have the obstacle insertion force light; Be pressed into movable member during become heavier elastic member compressive state by open and lighten, the reaction force of elastic member can pass through feel harmony sound confirmation simultaneously.At this moment because elastic member elongation, so can sealed member be pushed and in radial compression vertically.Thus, even flat tube etc. also can further exert pressure and obtain good sealing property outer circumferential face.Simultaneously, constraint component is pressed to the axial outside via sealed member, thereby the restriction of sliding is disengaged, and being pressed into of push nut becomes possibility, and the operating personnel can discern bellows and normally be inserted into assigned position.

In the above-mentioned joint for corrugated tube; As said slip limting mechanism, can be chimeric through the segmentation that makes the protuberance that is formed on the said constraint component and said guard ring, and the claw of said guard ring is remained on the hole enlargement state; When the compressive state of said elastic member is open; Follow the elongation of said elastic member, the protuberance of said constraint component breaks away from from the segmentation of said guard ring, thereby removes the restriction of sliding.

According to this structure, owing to can the claw of guard ring be remained on the hole enlargement state at first, so bellows inserts easily; When bellows is inserted into assigned position, elastic member elongation as stated, constraint component is pressed; Protuberance is fulcrum with the hooking part, breaks away from from segmentation to the displacement of hole enlargement side.Thus, the claw of guard ring can undergauge, and the restriction of sliding is disengaged.The combination that makes guard ring and constraint component in advance that is combined in of segmentation and protuberance is carried out easily, simultaneously can guard ring be remained on the point of hole enlargement state to see it is preferred.

In addition; In the joint for corrugated tube of the present invention; The inboard of the constraint component in being limited to said through hole disposes said sealed member, said elastic member and said holding member and movable member, and (front side) disposes said guard ring and said push nut in the outside, when the compressive state of said elastic member is open; The elongation of said elastic member is stopped by said constraint component, thereby on said guard ring and said push nut, is not applied the application of force of said elastic member.

According to this structure, the power that is pressed into that can access push nut diminishes and the good effect of operation property.

In addition, in the joint for corrugated tube of the present invention, the other end of said constraint component is formed with a plurality of sector part, when the compressive state of said elastic member is open, follows the elongation of said elastic member, and said sector part engages with the paddy portion of said bellows.

According to this structure, after bellows inserts, spur then engaging through sector part and paddy portion stops drawing in case will manage.Thus, can know that also pipe is inserted into assigned position.In addition, the slip of the push nut after following and easily to the claw location of guard ring and it is engaged with the paddy portion of bellows easily can obtain the effect of the dual drawing of prevention constraint component and guard ring after the slip of push nut.

In addition, joint for corrugated tube of the present invention, it has: adapter body, it has the through hole that inserts bellows; Push nut, the one of which end inserts said through hole, and can endwisely slipping at this through hole; Anti-avulsion parts, one of which end have the slip limting mechanism of slip of the said push nut of restriction, the other end is formed with that paddy portion with said bellows fastens can be scalable claw; Sealed member, it seals the outer circumferential face of said bellows; Elastic member, it is capable of expansion and contraction in the axial direction; Holding member and movable member; It keeps said elastic member with compressive state, the front end of the said bellows that is inserted into said movable member inwards side direction push, thereby make the compressive state of said elastic member open; And follow the elongation of said elastic member; Said sealed member is compressed in the axial direction, and the slip limting mechanism of said anti-avulsion parts is disengaged, and said push nut becomes and can slide.

According to this structure, component number lacks than above-mentioned joint for corrugated tube, equally also can make bellows normally be inserted into the reliable in action of assigned position.

In the above-mentioned joint for corrugated tube; Said anti-avulsion parts at one end are formed with the restriction projection of sliding; The part card of periphery ends in through hole, and the claw of said anti-avulsion parts remains on the hole enlargement state, when the compressive state of said elastic member is open; Follow the elongation of said elastic member, the slip restriction projection of said anti-avulsion parts is to leaning on the outside diameter displacement and remove the restriction of sliding than said push nut front end.

According to this structure; Owing to can the claw of anti-avulsion parts be remained on the hole enlargement state at first, insert bellows easily, then elastic member elongation when bellows is inserted into assigned position; The claw of anti-avulsion parts is pressed; Engage with the paddy portion of bellows, and the restriction projection of sliding is the hole enlargement side displacement of fulcrum to the push nut front end with the hooking part, removes the restriction of sliding.Afterwards, through being pressed into push nut, thereby the push nut front end is positioned at the internal side diameter of the restriction projection of sliding, and keeps the engaging of paddy portion of claw and the bellows of anti-avulsion parts.The restriction projection of sliding sees it is preferred on the point that structure is few at component number, joint length is little that outside diameter is avoided.

In addition; In the joint for corrugated tube of the present invention; The inboard of the anti-avulsion parts in being limited to said through hole disposes said sealed member, said elastic member and said holding member and movable member, disposes said push nut in the outside, when the compressive state of said elastic member is open; The elongation of said elastic member is stopped by said anti-avulsion parts, thereby on said push nut, is not applied the application of force of said elastic member.

According to this structure, can reach the effect that the power that is pressed into diminishes, operation property is good of push nut.

In the joint for corrugated tube of the present invention, the other end of said anti-avulsion parts is formed with a plurality of sector part, when the compressive state of said elastic member is open, follows the elongation of said elastic member, and said sector part engages with the paddy portion of said bellows.

According to this structure, after bellows inserts,, also can know thus to manage to be inserted into assigned position in case will manage pulling then engaging through sector part and paddy portion stops drawing.

In addition; In the joint for corrugated tube of the present invention; The collar tube sub-assembly card that the part of the periphery of said anti-avulsion parts is inserted in this through hole ends, and is connected at the groove on groove and the outer circumferential face of being located at said push nut on the inner peripheral surface of said collar tube sub-assembly via stop ring.

According to this structure, the part card that has saved the periphery of anti-avulsion parts ends the man-hour in through hole, and can insert in order and be assembled in through hole from being positioned at inboard component parts, so even assembling also is possible automatically, easy to manufacture thus.

In the above-mentioned joint for corrugated tube of the present invention; Said elastic member and said holding member and movable member are the kits of assembling in advance, this kit through section roughly L shaped and at one end be formed with holding member that card ends protuberance, end the stopper of the ring-type that the protuberance card ends with said card and support said holding member inner peripheral surface movable member and said elastic member is remained on compressive state.

According to this structure, owing to can assemble through other operations as kit, so even assembling also is possible automatically, thereby the shortening of whole manufacturing process can be made efficiently.

Perhaps; In above-mentioned joint for corrugated tube; Said holding member and movable member are that section is roughly L shaped and at one end be formed with card and end the holding member of protuberance and the movable member of the inner peripheral surface of the said holding member of supporting; The inner peripheral surface card that ends protuberance and said adapter body through said card ends, and said elastic member is remained on compressive state.

According to this structure, owing to do not need the stopper of ring-type, so can reduce component number.

Perhaps; Above-mentioned first to the 9th in the joint for corrugated tube of any record; Said elastic member is replaced with following structure with the holding member that compressive state keeps with the structure of movable member: by section roughly the コ font and at one end be formed with card only protuberance holding member and constitute with stopper that said card ends the ring-type that the protuberance card ends; The outer circumferential face intercalation that ends protuberance through said card remains on compressive state with said elastic member on the inner peripheral surface of said adapter body.

According to this structure, owing to do not need movable member, so can reduce component number.In addition, can access the effect that the movable member that can prevent to connect behind the bellows hinders gas flow.

In addition, joint for corrugated tube of the present invention has: adapter body, and it has the through hole that inserts bellows; Push nut, the one of which end inserts said through hole, and can endwisely slipping at this through hole; Pipe jointing part spare, its be formed with engage with the paddy portion of bellows can be scalable claw; The slip limting mechanism, it limits the slip of said push nut; Sealed member, it seals the outer circumferential face of said bellows; Elastic member, its said through hole axially on capable of expansion and contraction; Retaining mechanism; It keeps said elastic member with compressive state, through the insertion of said bellows, and the compressive state of the open said elastic member of said retaining mechanism; Follow the elongation of said elastic member; Said sealed member is compressed in the axial direction, and said slip limting mechanism is disengaged, and said push nut becomes and can slide.

The anti-avulsion effect that realizes managing as long as pipe jointing part spare can connect bellows and adapter body.For example can form the such structure of above-mentioned guard ring and anti-avulsion parts.In addition, the slip limting mechanism also can be made up of parts independently, perhaps also can carry out the one assembling as other functions of said pipe jointing part spare and form the structure of associating.

According to this structure, through the insertion of bellows, the compressive state of elastic member is by opening, and the reaction force of elastic member can pass through feel harmony sound confirmation.At this moment because elastic member elongation, so can sealed member be pushed and in radial compression vertically.Thus, even flat tube etc. also can further exert pressure and obtain good sealing property outer circumferential face.Simultaneously, the slip limting mechanism is pressed to the axial outside via sealed member, thereby the restriction of sliding is disengaged, and being pressed into of push nut becomes possibility, and the operating personnel can discern bellows and normally be inserted into assigned position.

In above-mentioned joint for corrugated tube of the present invention; Preferred said retaining mechanism is the kit of assembling in advance, this kit through section roughly L shaped and at one end be formed with holding member that card ends protuberance, end the stopper of the ring-type that the protuberance card ends with said card and support said holding member inner peripheral surface movable member and said elastic member is remained on compressive state.

According to this structure, owing to can assemble through other operations as kit, so even assembling also is possible automatically, thereby the shortening of whole manufacturing process can be made efficiently.

Perhaps; In above-mentioned joint for corrugated tube; Said retaining mechanism is that section is roughly L shaped and at one end be formed with card and end the holding member of protuberance and the movable member of the inner peripheral surface of the said holding member of supporting; The inner peripheral surface card that ends protuberance and said adapter body through said card ends, and said elastic member is remained on compressive state.

According to this structure, owing to do not need the stopper of ring-type, so can reduce component number.

Perhaps; In above-mentioned joint for corrugated tube; Said retaining mechanism is by section コ font and at one end be formed with card and end the holding member of protuberance and constitute with stopper that said card ends the ring-type that the protuberance card ends roughly; The outer circumferential face intercalation that ends protuberance through said card remains on compressive state with said elastic member on the inner peripheral surface of said adapter body.

According to this structure, owing to do not need movable member, so can reduce component number.In addition, can access the effect that the movable member that can prevent to connect behind the bellows hinders gas flow.

According to joint for corrugated tube of the present invention, how much be flat or distortion is arranged even can form bellows, because can further giving face after inserting, pipe presses, so joint for corrugated tube that can the long term maintenance sealability.In addition, because bellows is not inserted into the sliding action of the state limit push nut of assigned position,, so can make bellows be inserted into assigned position reliably so guard ring and anti-avulsion parts can undergauges.And, not being inserted into when bellows under the situation of assigned position, construction management person also can detect it from the outward appearance in construction place easily.

Description of drawings

Fig. 1 is an embodiment's of a joint for corrugated tube of the present invention half-sectional view.

Fig. 2 is an embodiment's of a joint for corrugated tube of the present invention parts open cube display.

Fig. 3 is the stereogram that makes the chimeric state of guard ring and constraint component of the present invention.

Fig. 4 is the embodiment's of an elastic member of the present invention stereogram.

Fig. 5 is the half-sectional view that in joint for corrugated tube of the present invention, inserts the state of bellows.

Fig. 6 is the half-sectional view that in joint for corrugated tube of the present invention, connects the construction finishing stage of bellows.

Fig. 7 is second embodiment's of a joint for corrugated tube of the present invention half-sectional view.

Fig. 8 is an embodiment the stereogram of the constraint component of the second embodiment of the present invention.

Fig. 9 is second embodiment's of the joint for corrugated tube of the present invention half-sectional view of state of insertion bellows.

Figure 10 is second embodiment's of the joint for corrugated tube of the present invention half-sectional view of construction finishing stage of connection bellows.

Figure 11 is the half-sectional view that bellows inserts the state that makes the push nut slip under the not enough situation in second embodiment of joint for corrugated tube of the present invention.

Figure 12 is the 3rd embodiment's of a joint for corrugated tube of the present invention half-sectional view.

Figure 13 is the 3rd embodiment's of the joint for corrugated tube of the present invention half-sectional view of state of insertion bellows.

Figure 14 is the 3rd embodiment's of the joint for corrugated tube of the present invention half-sectional view of construction finishing stage of connection bellows.

Figure 15 is the half-sectional view that bellows inserts the state that makes the push nut slip under the not enough situation in the 3rd embodiment of joint for corrugated tube of the present invention.

Figure 16 is the 4th embodiment's of a joint for corrugated tube of the present invention half-sectional view.

Figure 17 is the 4th embodiment's of the expression joint for corrugated tube of the present invention half-sectional view of decomposition process.

Figure 18 is the half-sectional view after the 4th embodiment's the decomposition of joint for corrugated tube of the present invention.

Figure 19 is the 5th embodiment's of a joint for corrugated tube of the present invention half-sectional view.

Figure 20 is the 6th embodiment's of a joint for corrugated tube of the present invention half-sectional view.

Figure 21 is the 6th embodiment's of the joint for corrugated tube of the present invention stereogram of holding member.

Figure 22 is the 6th embodiment's of the joint for corrugated tube of the present invention half-sectional view of construction finishing stage of connection bellows.

Description of reference numerals

1,1A, 1B, 1C, 1D, 1E: joint for corrugated tube

10,10A, 10B, 10C, 10D, 10E: adapter body

11: the butt end difference

12,12A: depressed part (ヌ ス ミ portion)

13: groove

13A: constraint component keeps end difference

14: outer screw section

15: instrument card extension portion

16: through-hole section

17: the first fastening grooves

18a: card ends end difference

18b: big footpath end difference

19: end difference

19a: stopper hooking part

20,20B: push nut

21: head

22: inserting hole portion

23:O type annular groove

24: the insertion part

25: card ends groove

26: vent

28: the taper inner face

28B: front end

30,30A: constraint component

31,31A: protuberance

32,32A: main part

33: sector part

34: notch

40: sealed member

42: metal guide spare

44: fire-resistant pad

47: watertight O type ring

48: the watertight pad

50: guard ring

52; Claw

53: segmentation

54: the taper outside

60: select the breathability parts

61: stop ring

63: decompose with ring

65: the axle collar

65a: handle portion

70: elastic member

70A: special-shaped section spring (square spring)

70B: conical helical spring

70B, 70C: ripple spring (コ イ Le De ウ エ イ Block ス プ リ Application グ)

70D1: ripple packing ring (ripple seat gold)

70D2: plain washer

70E: gentle helix spring

72,72E: holding member

73,73E: card ends protuberance

75,75E: stopper

80: movable member

81: heavy section

82: thinner wall section

90,90C: anti-avulsion parts

91: the restriction projection of sliding

92: main part

93: sector part

100: cylindrical sleeve (sleeve pipe (people れ) parts)

112: depressed part

115; Back-up ring

117: the first fastening grooves

118a: card ends end difference

123:O type annular groove

147:O type ring

150: the holding member fastening groove

152: inserting part

154: the holding member mobile space

T: bellows

T2: mountain portion

T4: paddy portion

T6: resin-coated layer

Embodiment

(first mode of execution)

First mode of execution of the present invention uses Fig. 1～Fig. 6 to describe.Fig. 1 representes an embodiment's of joint for corrugated tube of the present invention half-sectional view; Fig. 2 representes an embodiment's of joint for corrugated tube of the present invention parts open cube display; Fig. 3 representes the stereogram that makes the chimeric state of guard ring and constraint component of the present invention; Fig. 4 representes the embodiment's of elastic member of the present invention stereogram; Fig. 5 representes that bellows of the present invention inserts the half-sectional view of the state of joint for corrugated tube, and Fig. 6 is illustrated in the half-sectional view that connects the construction finishing stage of bellows in the joint for corrugated tube of the present invention.

As illustrated in fig. 1 and 2, joint for corrugated tube 1 has: adapter body 10, and it has from the through-hole section 16 of a distolateral insertion bellows T; Push nut 20, it has the head 21 in the big footpath of a square one-tenth and the insertion part 24 that the opposing party forms path, and insert in the through-hole section 16 of adapter body 10 this insertion part 24; Guard ring 50, the front end that it is configured in push nut 20 has the claw 52 that engages with the paddy portion of bellows; Constraint component 30, the protuberance 31 that it is formed with and a plurality of claws 52 of guard ring 50, the segmentation between 52 53 are chimeric; Sealed member 40, the outer circumferential face of its seal bellows T; Elastic member 70, it keeps with compressive state; Holding member 72; Movable member 80, it is pressed against on the front end of bellows T and can slides to the inboard direction of through-hole section 16.In addition, be formed with outer screw section 14 that is connected with other tube partss and the set of tools portion 15 that is used for outer screw section 14 and other tube partss are screwed togather of being used on another distolateral outer surface of adapter body 10.

On the through-hole section 16 of the outside of adapter body 10 (among the figure left to), be formed with first fastening groove 17 that has towards the conical surface of inboard direction (the figure right-of-center in political views direction) undergauge of through-hole section 16, and then on the inboard direction of through-hole section 16, be formed with the diameter of first fastening groove 17 and end end difference 18a and end with card that end difference 18a links to each other and than the card big footpath end difference 18b in the big footpath of end difference 18a only with the card in footpath.On the other hand, be formed with card on the insertion part 24 of push nut 20 and end groove 25.And, cross over first fastening groove 17 and end groove 25 and configuration stop ring 61 with card.Stop ring 61 is ring bodies of the metal C type of rubber-like shape; When the through-hole section 16 of adapter body 10 is inserted the insertion part 24 of push nut 20; Undergauge and being accommodated in the fastening groove 25; Carry out some hole enlargements when coming the position of first fastening groove 17, in advance adapter body 10 is connected with push nut 20 thus.

On the insertion part 24 of push nut 20, form O type annular groove 23, watertight O type ring 47 is installed at this.In addition, has watertight pad 48 in the inserting hole portion 22 of push nut 20.Therefore, stop the inside that gets into joint for corrugated tube from the moisture of outside or dust etc.

And, the axle collar 65 that configuration can break away between the head 21 of end face of adapter body 10 and push nut 20.The handle portion 65a of the pulling axle collar 65; After pulling down the axle collar 65, push nut 20 is slided in through-hole section 16 and be pressed into wherein, then stop ring 61 is along the conical surface undergauge of first fastening groove 17; Push nut 20 is slided; Stop ring 61 hole enlargements when ending end difference 18a to the Dacca are crossed over card and are ended end difference 18a and end groove 25 with card and dispose, so push nut 20 can not break away from ground from adapter body 10 and ended (with reference to Fig. 5) by card on this position.

In addition; In the time of need constructing again; The decomposition that between the head 21 of end face of adapter body 10 and push nut 20, clips predetermined thickness is pulled down this decompositions with ring 63 with ring 63, then can be to decompose with the through-hole section 16 of the amount of encircling 63 thickness with push nut 20 press-in connector main bodys 10.And; Pull down and decompose with ring 63, push nut 20 further is pressed into the inboard of through-hole section 16, then stop ring 61 moves to big footpath end difference 18b from the position that card ends end difference 18a; In these stop ring 61 hole enlargements, so being connected of adapter body 10 and push nut 20 by opening.Thus, adapter body 10 can be decomposed with push nut 20.

In addition, push nut 20 is provided with the vent 26 to insertion part 24 perforations from patchhole portion 22, is provided with and selects breathability parts 60.

Selecting breathability parts 60 for example to adopt by containing presses solidly the sheet material that extends the continuous poriferous plasma membrane that processes shape behind the TFE powder and constitutes; Have the continuous fine pore of 0.1～5 μ m, and possess make the such gas of air or water vapour through but the material of the characteristic that liquid such as water are rebounded.Perhaps; Can use the porous plastid that is shaped by thermoplastic resin powders such as polyethylene, polypropylene, polyacrylic acid formicester, polystyrene, ethylene-vinyl acetate copolymer, tetrafluoro ethylene polymers, also can use porous matter sheet material through polyvinyl alcohol, formaldehyde and acid catalyst one being reacted form shape etc. with continuous pore with continuous pore.

These select breathability parts to have vent ability, water vapor transmission through the such gas of air and water vapour, the water proofing property that does not see through with liquid such as water and soups on the other hand, and protection against dust, resistance to chemical reagents, weathering resistance etc. are also good in addition.Therefore, stop solid (dust etc.) and liquid (water and dew etc.) in export-oriented joint, to see through and intrusion, prevent in the long-term time after pipe arrangement is constructed that moisture and dust from invading from the outside, do not produce problems such as internal corrosion.

Particularly; Overlayed on the inner face of the resin-coated layer T6 on the periphery of bellows T that (not shown) is provided with concavo-convex on the length direction of pipe; If bellows construction mistiming is squeezed into nail in the pipe; The gas that then leaks out is selected breathability parts 60 along concavo-convex guiding to, and selects breathability parts 60 because gas permeations such as gas, air, so the reduction through seal pressure in detecting or utilize gas leakage sensor etc. and can detect having or not of leakage.

The internal structure of joint for corrugated tube of the present invention then, is described.

At first; Inner face side in the insertion part 24 of push nut 20 forms the taper inner face 28 towards the front end hole enlargement; And configuration guard ring 50; The tapers outside 54 that this guard ring 50 at one end has and this taper inner face 28 forms relatively has the claw 52 that engages with the T4 of paddy portion of bellows T at the internal side diameter of the other end.This guard ring 50 is the ring-shaped members that in the through-hole section 16 of adapter body 10, are configured between sealed member 40 and the push nut 20.Ring-type as shown in Figure 2, that the rear portion of taper outside 54 is integrally formed, another distolateral front portion is divided into a plurality of sector part (for example 8) through axial segmentation 53.The front end of each sector part is provided with the claw 52 that stretches out to the radial direction inboard.Guard ring 50 for example is that parent is that plastics system, claw 52 are the parts of brass system and both integrally moulded shapings.And the internal diameter of the claw 52 of this guard ring 50 profile than bellows T under no-load condition is big.Therefore, in the insertion stage of bellows T, the claw 52 of guard ring 50 can not engage with the T2 of mountain portion of bellows T and insert swimmingly.

Constraint component 30 is the plastic parts that are configured in the ring-type between above-mentioned guard ring 50 and the sealed member 40.As shown in Figure 2, the main part 32 of the C shape of divide being broken off in a part one distolateral be provided with segmentation 53 with the chimeric protuberance 31 of number segmentation (for example 8) and guard ring 50 53.In addition, another distolateral a plurality of sector part 33 of separately being arranged to constitute towards the taper outside of end diameter reducing.And as shown in Figure 3, guard ring 50 is assembled with protuberance 31 with constraint component 30 chimeric segmentations 53 in advance.Therefore, the claw 52 of guard ring 50 can not undergauge under this state.Like this, through assembling the slip limting mechanism that both constitute the slip of restriction push nut.

And main part 32 cards of constraint component 30 end in the groove 13 on being located at through-hole section 16.In addition, on through hole 16, abut to form depressed part 12 with groove 13.Constraint component 30 is owing to the periphery and groove 13 cards of main part 32 end; So through after the elastic member stated effect and be that fulcrum makes sector part 33 side undergauges with main part 32; End with the paddy portion card of bellows; Protuberance 31 with main body (card end) portion 32 be fulcrum to the displacement of hole enlargement side, thereby from guard ring 50 disengagings.

Sealed member 40 is rubber system elastic members of ring-type; Outside diameter is set greatlyyer than the internal diameter of the inner peripheral surface of the through hole 16 of adapter body 10; Airtight connecting airtight and the through-hole section 16 of press-in connector main body 10, and can be configured movably in the axial direction along the inner peripheral surface of the through-hole section 16 of adapter body 10.On the other hand, internal side diameter is set smallerly than the external diameter of bellows T.In addition, sealed member 40 is owing to need keep sealability, the preferred nitrile butadiene rubber (NBR) so consider gasproof property in long-term especially.

In addition, in the present embodiment, a distolateral L shaped metal guide spare 42 of integrated bonding section of of sealed member 40 is provided with fire-resistant pad 44 on metal guide spare 42.Sealed member 40 plays sealing function often, but considers the situation that fire etc. burns, and preferably has fire-resistant pad with non-common state.

This fire-resistant pad 44 is for example through filling the rubber composition that the compounding filled as required material of zinc intercalation compound of crude rubber and the thermal expansion of acomia blister attitude, softener material, vulcanzing agent etc. get in mould, then carry out punching press and vulcanize and make.The zinc intercalation compound is for example to have combined the compound of silver sulfate through what make that the reaction of sulfuric acid and graphite (the six membered ring polymer layer is with the hexagonal crystal class crystalline solid of the range upon range of carbon of stratiform) gets at interlayer; Be heated to more than 170 degree; Then volume is increased to several times and even tens of times with acomia blister attitude; Be heated to 800 degree～1000 degree, then the volume of outward appearance is increased to 100 and even 250 times.As crude rubber, can use natural rubber (NR), nitrile butadiene rubber (NBR), neoprene (CR), ethene-acrylic rubber (EPDM), silicone rubber (Q) etc.

Joint for corrugated tube 1 is exposed under the situation of high temperature in fire etc.; Sealed member 40 burns, but fire-resistant pad 44 thermal expansions are filled in the space of adapter body 10 and bellows T; The external diameter of seal bellows T, thus prevent to produce gas leakage during fire and infringement is enlarged.Particularly; 42 formation of metal guide spare block the outside dimension that ends with the end difference 19 of the through hole 16 of adapter body 10; Metal guide spare 42 ended with end difference 19 cards when fire-resistant pad 44 expanded; Can not move to the inboard of through hole 16 (figure right-of-center in political views direction), thus fire-resistant pad 44 only expand to the inlet side (left side of metal guide spare 42 among the figure) of through hole 16, so this space of landfill and guarantee the sealing surface pressure easily.

Holding member 27 is the L shaped metallic parts of section, an end form can undergauge card end protuberance 73.And, inserting elastic member 70 at the outer circumferential face of holding member 72, the stopper 75 of ring-type ends protuberance 73 cards with card and ends, thus elastic member 70 doubly keeps with compressive state.And, insert movable member 80 at the inner peripheral surface of holding member 72, only on the outer circumferential face of movable member 80, blocking, protuberance 73 can not be held undergauge.Movable member 80 is resin parts cylindraceous, is made up of the heavy section 81 on the inner peripheral surface that can be entrenched in holding member 72 slidably and the inside that extends to sealed member 40 and the thinner wall section 82 that contacts the front end of bellows.Therefore, movable member moves and when not having the pushing of heavy section 81, holding member 72 is opened in the undergauge side, and the card that card ends protuberance 73 and stopper 75 only is disengaged.

Elastic member 70 can be brought into play pressing force and get final product by constituting at axial stretching parts freely during elongation, no matter its material and shape are how, still from the preferred helical spring parts of easy property of pressing force and acquisition.The elastic member 70 of present embodiment is made up of stainless steel coil springs.The helical spring of expression section circle shape among the embodiment, but also can adopt ripple packing ring 70D1 shown in special-shaped section spring (square spring) 70A, the conical helical spring 70B shown in Fig. 4 (b), the ripple spring 70C shown in Fig. 4 (c), Fig. 4 (d) of Fig. 4 (a) and cluster spring, the gentle helix spring 70E shown in Fig. 4 (e) of plain washer 70D2 to be configured to a plurality of circular modes, the bamboo shoots shape spring 71F shown in Fig. 4 (f).

Wherein, The cluster spring of conical helical spring 70B, ripple spring 70C, ripple packing ring 70D1 and plain washer 70D2 and bamboo shoots shape spring 70F are useful in the miniaturization of elastic member; In addition, ripple spring 70C and gentle helix spring 70E can be useful applying on the point of uniform reaction force on the circumference.

Particularly to select spring constant through its shape be easy to ripple spring 70C; Compare with general helical spring and can shorten total length; The result in addition, can on circumference, apply uniform reaction force, so can make corrugated pipe connector compact; And sealed member 40 is evenly compressed, so be preferred.

Then, be described in detail in order and the effect thereof that is connected bellows T in the joint for corrugated tube 1 with reference to Fig. 5 and Fig. 6.

As shown in Figure 5, in joint for corrugated tube 1, insert bellows T, then guard ring 5 is held with the hole enlargement state, and its internal diameter is bigger than the external diameter of bellows T, so can bellows T be inserted into metal guide spare 42 swimmingly.Then, experience a little feel at the inner peripheral surface of sealed member 40, when simultaneously further being pressed into bellows T, the thinner wall section 82 of the front end butt movable member 80 of bellows T then.As if the further application of force, then in the insertion of bellows, movable member 80 slides to the inboard direction of through-hole section 16 then, and the heavy section 81 of movable member 80 leaves from the inner peripheral surface of holding member 72.

So, so the card of holding member 72 ends protuberance 73 because pushing of undergauge direction is disengaged undergauge.Elastic member 70 elongations simultaneously, stopper 75 end protuberance 73 from card and break away from, and an end extends to till the butt end difference 11 of stopper 75 butt through-hole section 16, and the Way in to through-hole section 16 slides the other end via holding member 72, pushes sealed member 40.And then metal guide spare 42 also slides to Way in fire-resistant pad 44, and the sector part 33 of constraint component 30 is pushed in the end of the metal guide spare 42 of L type.

Thus; Constraint component 30 is owing to groove 13 cards of main part 32 with adapter body 10 end; So main part 32 engages the paddy portion of bellows T for fulcrum makes sector part 33 undergauges; One distolateral protuberance 31 is to the displacement of hole enlargement direction, breaks away from from the segmentation 53 of guard ring 50, is housed in the depressed part 12 of adapter body 10.But, guard ring 50 since the protuberance 31 of constraint component 30 break away from from segmentation 53, so form can undergauge state.In other words, under the state that the protuberance 31 of constraint component 30 does not break away from from the segmentation 53 of guard ring 50, it is impossible that guard ring 50 continues that with state that can not undergauge being pressed into of push nut 20 become.Promptly; Bellows T is not inserted under the state of assigned position, between the head 21 of adapter body 10 and push nut 20, produces the gap, so construction operation personnel not only; Under the construction management personnel constructed situation about detecting, it was bad in possible trouble also can to find to construct.

In addition, at this moment, the front end of the sector part 33 of constraint component 30 engages with the paddy portion of bellows T, thus bellows T is applied the power of drawing direction, thus bellows T can not be pulled out, so can confirm to be inserted into assigned position.In addition, constraint component 30 engages with the paddy portion of bellows T, thereby the position of bellows T and joint for corrugated tube 1 confirms that the claw of following guard ring engages to the paddy portion of bellows T easily, and forms dual connection simultaneously.

In addition, the sealed member 40 between constraint component 30 and holding member 72 is accepted the application of force (spring force) of elastic member 70 and is compressed and the internal diameter undergauge vertically, improves so the sealing surface of the outer circumferential face of sealed member 40 and bellows T is pressed.Even for example how much there is bellows flat or distortion, since further pressurized from outside diameter, so can realize airtight sealing.In addition, elastic member 70 is set in advance and under elongation state as shown in Figure 5, also gives the application of force, thereby even the permanent crooked appearance of sealed member 40, also can with sealing surface press maintain certain more than.Particularly, constraint component 30 is because main part 32 ends with groove 13 cards, and sector part 33 engages with the paddy portion of bellows, so sector part 33 is fixed with this state, can pass through the application of force and the compression seal parts reliably of elastic member 70.

And, as shown in Figure 6, pull down the axle collar 65 of configuration between adapter body 10 and push nut 20, push nut 20 is pressed into to inboard slip of the through-hole section of adapter body 10.So, the taper inner face 28 that forms at the front end of push nut 20 and taper outside 54 butts of guard ring 50, the claw 52 of guard ring 50 engages with the paddy portion of bellows T.At this moment, the main part of constraint component 30 32 ends with groove 13 cards of adapter body, and protuberance 31 is housed in the depressed part 12 and makes fixed-site in addition, so the elongation of elastic member 70 is stoped by this constraint component, the restrained parts of the application of force divide and break off.Like this, because guard ring 50 even push nut 20 do not receive the application of force, so pressing force is little.According to more than, bellows T and joint for corrugated tube 1 firmly is connected, the completion of constructing.Construction operation personnel and construction management personnel then can discern the assigned position that bellows T is inserted into joint for corrugated tube 1 if confirm push nut 20 press-in connector main bodys 10, have carried out normal construction.

In addition, in this mode of execution, movable member 80 forms with stopper 75 splits, but also can be set to one.In addition; The front end of movable member 80 butt bellows T and being provided with; But movable member 80 also can be set to the plane of inclination butt with the centre of the mountain portion of bellows T and paddy portion, even making that the front end of bellows T is a little is cut off obliquely, also can push movable member 80.

(second mode of execution)

Then, use Fig. 7～Figure 11 that second mode of execution is described.Fig. 7 representes second embodiment's of joint for corrugated tube of the present invention half-sectional view; Fig. 8 representes an embodiment the stereogram of the constraint component of the second embodiment of the present invention; Fig. 9 representes second embodiment's of the joint for corrugated tube of the present invention half-sectional view of state of insertion bellows; Figure 10 representes second embodiment's of the joint for corrugated tube of the present invention half-sectional view of construction finishing stage of connection bellows, and Figure 11 is illustrated in bellows among second embodiment of joint for corrugated tube of the present invention and inserts the half-sectional view that makes the state that push nut slides under the not enough situation.

In addition, use identical reference character with Fig. 1～identical structure of joint for corrugated tube shown in Figure 6, it explains omission.

As shown in Figure 7, joint for corrugated tube 1A is except the structure of adapter body 10A, constraint component 30A, has the structure identical with joint for corrugated tube shown in Figure 11.Constraint component 30A represent to slide other embodiments of limting mechanism, as shown in Figure 8, it has the main part 32A of notch 34 by the part of ring-type then and constitutes from the protuberance 31A that the distal process of this main part 32A goes out.

On the other hand, forming constraint component on the inner peripheral surface of adapter body 10A keeps end difference 13A and keeps the depressed part 12A of end difference 13A adjacency with this constraint component.And, because constraint component 30A has notch 34, thus can undergauge, and main part 32A is configured in constraint component and keeps on the end difference 13A under by the state of undergauge.In addition, the protuberance 31A of constraint component 30A is entrenched on the segmentation 53 of guard ring 50.

As shown in Figure 9, in joint for corrugated tube 1A, insert bellows T, then guard ring 50 is held with the hole enlargement state, because its internal diameter is bigger than the external diameter of bellows T, so can bellows T be inserted in the metal guide spare 42 swimmingly.Then, if on the inner peripheral surface of sealed member 40, experience a little feel, further be pressed into bellows T, the then thinner wall section 82 of the front end butt movable member 80 of bellows T simultaneously.As if the further application of force, then in the insertion of bellows, movable member 80 slides to the inboard direction of through-hole section 16 then, and the heavy section 81 of movable member 80 leaves from the inner peripheral surface of holding member 72.

So, so the card of holding member 72 ends protuberance 73 because pushing of undergauge direction is disengaged undergauge.Elastic member 70 elongations simultaneously, stopper 75 end protuberance 73 from card and break away from, and an end extends to till the butt end difference 11 of stopper 75 butt through-hole section 16, and the Way in to through-hole section 16 slides the other end via holding member 72, pushes sealed member 40.And then metal guide spare 42 also slides to Way in fire-resistant pad 44, and the main part 32A of constraint component 30A is pushed in the end of the metal guide spare 42 of L type.

Thus; Constraint component 30A keeps on the end difference 13A with the constraint component that the undergauge state remains on adapter body 10A; So slide to inlet side through above-mentioned pressing force, move on one side to the depressed part 12A of adapter body 10A hole enlargement on one side, be housed at last in the depressed part 12A.But, guard ring 50 since the protuberance 31 of constraint component 30A break away from from segmentation 53, so form can undergauge state.In other words, under the state that the protuberance 31A of constraint component 30A does not break away from from the segmentation 53 of guard ring 50, it is impossible that guard ring 50 continues that with state that can not undergauge being pressed into of push nut 20 become.

In addition; Sealed member 40 between constraint component 30 and holding member 72 is accepted the application of force of elastic member 70 and is compressed vertically; The sealing surface of the outer circumferential face of sealed member 40 and bellows T is pressed and is improved; Even, also can realize airtight sealing so for example how much there is bellows flat or distortion.In addition, elastic member 70 is set in advance and under elongation state as shown in Figure 9, also gives the application of force, thereby even the permanent crooked appearance of sealed member 40, also can with sealing surface press maintain certain more than.

In addition, shown in figure 10, pull down the axle collar 65 of configuration between adapter body 10 and push nut 20, push nut 20 is pressed into to inboard slip of the through-hole section of adapter body 10A.So, the taper inner face 28 that forms at the front end of push nut 20 and taper outside 54 butts of guard ring 50, the claw 52 of guard ring 50 engages with the paddy portion of bellows T.Thus, bellows T firmly is connected with joint for corrugated tube 1, and construction is accomplished.Construction operation personnel and construction management personnel then can discern the assigned position that bellows T is inserted into joint for corrugated tube 1 easily if confirm push nut 20 press-in connector main bodys 10, have carried out normal construction.In addition, the restrained parts 30A of the elongation of elastic member 70 stops, and the application of force is disconnected at this, so likewise the pressing force of push nut is little with the foregoing description.

On the other hand; In the time of will being pushed down into push nut 20 at the state that bellows T does not insert assigned position; Then shown in figure 11, form the front end of front end butt push nut 20 of the protuberance 31A of following structure: constraint component 30A, push nut 20 can not further slide.As previously discussed, the protuberance 31A of constraint component 30 is entrenched on the segmentation 53 of guard ring 50, thus guard ring 50 self also undergauge be impossible.Like this; Bellows T does not insert in the state of assigned position; The slip of push nut 20 is not accomplished, and between the head 21 of adapter body 10 and push nut 20, produces the gap, so construction operation personnel not only; Under the construction management personnel also constructed situation about detecting, it was bad in possible trouble to prevent to construct.

As the slip limting mechanism, the mechanism of the protuberance of chimeric constraint component on the segmentation of guard ring, owing to make the claw of guard ring can undergauge and the advantage in the manufacturing is arranged, so be preferred.But be not limited to this.For example also can consider following mechanism: other in advance chimeric inserting on the segmentation of guard ring, follow the elongation of elastic member and constraint component is moved, push and said inserting is broken away from by protuberance.In addition, also can be following mechanism: individually it is remained the state of hole enlargement with guard ring, stop function to be separated with the slip of the protuberance of constraint component.For example consider following mechanism: though a little change of the external diameter of joint is big, guard ring is formed the hole enlargement state that remains, make the protuberance location-independent of constraint component at the outside diameter of this guard ring in advance by molded and shaped.In addition, other mode of executions describe following.

(the 3rd mode of execution)

Then, with reference to Figure 12～Figure 15 the 3rd mode of execution is described.Figure 12 is the 3rd embodiment's of a joint for corrugated tube of the present invention half-sectional view; Figure 13 representes the 3rd embodiment's of the joint for corrugated tube of the present invention half-sectional view of state of insertion bellows; Figure 14 representes the 3rd embodiment's of the joint for corrugated tube of the present invention half-sectional view of construction finishing stage of connection bellows, and Figure 15 is illustrated in bellows among the 3rd embodiment of joint for corrugated tube of the present invention and inserts the half-sectional view that makes the state that push nut slides under the not enough situation.

In addition, use identical reference character with Fig. 1～identical structure of joint for corrugated tube shown in Figure 6, it explains omission.

Shown in figure 12, joint for corrugated tube 1B has: adapter body 10B, and it has from the through-hole section 16 of a distolateral insertion bellows T; Push nut 20B, it has at the head 21 in the big footpath of a square one-tenth with the opposing party and forms the insertion part 24 of path, and the through-hole section 16 of adapter body 10 is inserted in this insertion part 24; Anti-avulsion parts 90, the front end that it is configured in push nut 20B has the sector part 93 chimeric with the paddy portion of bellows; Sealed member 40, it is with the outer circumferential face sealing of bellows T; Elastic member 70, it is held with compressive state; Holding member 72; Movable member 80, its front end by bellows T is pushed, and can slide to the inboard direction of through-hole section 16.

In other words, joint for corrugated tube 1B constitutes as the anti-avulsion parts 90 of the function of guard ring that has joint for corrugated tube shown in Figure 11 in the lump 50 and constraint component 30.

Be formed with first fastening groove 17 that has towards the conical surface of inboard direction (the figure right-of-center in political views direction) undergauge of through-hole section 16 on the through-hole section 16 in the outside of adapter body 10B (among the figure left to), and then be formed with in the inboard direction of through-hole section 16 and end end difference 18a with the diameter of first fastening groove 17 with the card in footpath and to end with card that end difference 18a links to each other and than card big depressed part 12 and the groove 13 of end difference 18a diameter only.On the other hand, on the insertion part 24 of push nut 20B, form card and end groove 25.And, cross over first fastening groove 17 and end groove 25 and configuration stop ring 61 with card.In addition, the axle collar 65 that configuration can break away between the head 21 of the end face of adapter body 10B and push nut 20B.

The main part 92 of anti-avulsion parts 90 ends with groove 13 cards of being located on the through-hole section 16.Anti-avulsion parts 90 form the main part 92 of a part of C shape that is disconnected and are positioned at a distolateral slip and limit projection 91, and this front end 28B that slides restriction projection 91 and push nut 20B stands facing each other.Be set to constitute a plurality of sector part 93 towards the taper outside of end diameter reducing another distolateral cutting apart.Anti-avulsion parts 90 and guard ring 50 likewise for example are that to be plastics system, sector part 93 be integrally molded into the parts of shape for brass system and both to parent.And; Main part 92 cards end in groove 13; So elongation through elastic member 70; With main part 32 is that fulcrum makes sector part 33 side undergauges and ends with the paddy portion card of bellows, the restriction projection 91 of sliding with main part 92 be fulcrum to the displacement of hole enlargement side, thereby the front end 28B of avoidance push nut 20B.In addition, the internal diameter of the sector part 93 of anti-avulsion parts 90 forms the big footpath bigger than the profile of bellows T under no-load condition.Therefore, in the insertion stage of bellows T, the sector part 93 of anti-avulsion parts 90 can not engage with the T2 of mountain portion of bellows T and insert swimmingly.

Then, with reference to Figure 13～15 detailed description bellows T is connected order and effect thereof among the joint for corrugated tube 1B.

Shown in figure 13, joint for corrugated tube 1B is inserted bellows T, then because the internal diameter of anti-avulsion parts 90 is bigger than the external diameter of bellows T, so can bellows T be inserted metal guide spare 42 swimmingly.Then, experience a little feel at the inner peripheral surface of sealed member 40, when simultaneously further being pressed into bellows T, thinner wall section 82 end faces of the front end butt movable member 80 of bellows T then.And if the further application of force, then in the insertion of bellows, movable member 80 slides to the inboard direction of through-hole section 16, and the heavy section 81 of movable member 80 leaves from the inner peripheral surface of holding member 72.

So, so the card of holding member 72 ends protuberance 73 because pushing of undergauge direction is disengaged undergauge.Elastic member 70 elongations simultaneously, stopper 75 end protuberance 73 from card and break away from, and an end extends to till the butt end difference 11 of stopper 75 butt through-hole section 16, and the Way in to through-hole section 16 slides the other end via holding member 72, pushes sealed member 40.And then metal guide spare 42 also slides to Way in fire-resistant pad 44, and the sector part 93 of constraint component 90A is pushed in the end of the metal guide spare 42 of L type.

Thus; Anti-avulsion parts 90 are owing to groove 13 cards of main part 92 with adapter body 10B end; So with main part 92 is that fulcrum makes sector part 93 undergauges engage the paddy portion of bellows T, a distolateral protuberance 91 is housed in the depressed part 12 of adapter body 10B to the displacement of hole enlargement direction.But, be housed in the depressed part 12 because slip limits projection 91, so being pressed into of push nut 20 also is possible.

In addition; Sealed member 40 is accepted the application of force of elastic member 70 and is compressed and the internal diameter undergauge vertically; So pressing, improves the sealing surface of sealed member 40 and bellows T; Even so for example how much there is bellows flat or distortion, since further pressurized from outside diameter, so also can realize airtight sealing.In addition, elastic member 70 is set in advance and under elongation state shown in figure 13, also gives the application of force, thereby even the permanent crooked appearance of sealed member 40, also can with sealing surface press maintain certain more than.Particularly, constraint component 90 is because main part 92 ends with groove 13 cards, and sector part 93 engages with the paddy portion of bellows, so sector part 93 is fixed with this state, can pass through the application of force and the compression seal parts reliably of elastic member 70.

In addition, shown in figure 14, pull down the axle collar 65 that between adapter body 10B and push nut 20B, disposes, push nut 20B is pressed into to the inboard slip of the through-hole section of adapter body 10B.So the front end 28B of push nut 20B embeds the internal side diameter of the slip restriction projection 91 of anti-avulsion parts 90.Thus, because the restriction projection 91 of sliding can not undergauge, so sector part 93 engages with the paddy portion of bellows T securely.At this moment the main part 92 of anti-avulsion parts 90 ends with groove 13 cards of adapter body, and the restriction projection 91 of sliding in addition is housed in the depressed part 12 and makes fixed-site, so the elongation of elastic member 70 is stoped by this constraint component, the restrained parts of the application of force break off.Like this, because push nut 20 does not receive the application of force, so pressing force is little.Know that according to above bellows T firmly is connected with joint for corrugated tube 1, construction is accomplished.

Construction operation personnel and construction management personnel then can discern the assigned position that bellows T is inserted into joint for corrugated tube 1B if confirm push nut 20B press-in connector main body 10B, have carried out normal construction.

On the other hand; In the time of will being pushed down into push nut 20B at the state that bellows T does not insert assigned position; Then shown in figure 15, the front end 28b of the front end butt push nut 20B of the slip restriction projection 91 of anti-avulsion parts 90, push nut 20B is restricted to and can not further slides.Like this; Bellows T does not insert in the state of assigned position; The slip of push nut 20B is not accomplished, and between the head 21 of adapter body 10B and push nut 20B, produces the gap, so construction operation personnel not only; Under the construction management personnel also constructed situation about detecting, it was bad in possible trouble to prevent to construct.

In addition; Be not inserted into drawing bellows T under the state of assigned position from bellows T; Follow this action, sealed member 40 slides, the mode that does not engage with the sector part 93 and the bellows T portion of anti-avulsion parts 90; Inner peripheral surface at adapter body 10B is provided with side-prominent stopper hooking part 19a of inside week, and stopper 75 cards are ended.

Stopper 75 ends protuberance with the card of holding member 72 and engages; In addition; Holding member 72, sealed member 40, metal guide spare 42 are integrally formed through bonding etc., so under the situation of drawing bellows T, sealed member 40 is slided even do not note towards the inlet side of through-hole section 16.

(the 4th mode of execution)

Then, with reference to Figure 16～Figure 18 the 4th mode of execution is described.Figure 16 representes the 4th embodiment's of joint for corrugated tube of the present invention half-sectional view; Figure 17 representes the 4th embodiment's of the joint for corrugated tube of the present invention half-sectional view of decomposition process, and Figure 18 representes the half-sectional view after the 4th embodiment's the decomposition of joint for corrugated tube of the present invention.

In addition, use identical reference character with Fig. 1～identical structure of joint for corrugated tube shown in Figure 15, it explains omission.

Shown in figure 16, the point that joint for corrugated tube 1C is different from the foregoing description is: in the through-hole section 16 of adapter body 10C, have cylindrical sleeve 100, the periphery of supporting anti-avulsion parts 90C.Be formed with first fastening groove 117 that has towards the conical surface of inboard direction undergauge on the inner peripheral surface of cylindrical sleeve 100, be adjacent and be formed with and end end difference 118a with the diameter of first fastening groove 117 with the card in footpath and Bi Ka ends the depressed part 112 in the big footpath of end difference 118a.And the card of crossing on the insertion part 24 that is formed on push nut 20B ends groove 25 and configuration stop ring 61.In addition, on the outer circumferential face of cylindrical sleeve 100, form O type annular groove 123, via O type ring 147 by water-stop.In addition, cylindrical sleeve 100 is ended with adapter body 10C card via back-up ring 115.

Owing to using like this cylindrical sleeve 100 to constitute, assemble each structure member so can insert in order from the inboard of the through-hole section 16 of adapter body 10C.And, if make this assembling automation, then can assemble joint for corrugated tube 1C with being more prone to, can reduce manufacture cost.

In addition, joint for corrugated tube 1C joint for corrugated tube 1B that kind shown in figure 12 is not provided with the end difference 19 that card ends metal guide spare 42.But, in fire etc., be exposed under the high temperature, under the situation that sealed member 40 burns, because ripple spring 70C further extends, so, also can limit metal guide spare 42 and move to the inboard of through-hole section 16 even fire-resistant pad 44 expands.

For the decomposition of joint for corrugated tube 1C, shown in figure 17, the decomposition that clips between the head 21 with adapter body 10C and push nut 20B is taken off with ring 63, with push nut 20B press-in connector main body 10C one side.So stop ring 61 moves to depressed part 112 from the position that card ends end difference 118a, because in these stop ring 61 hole enlargements, so being connected of adapter body 10C and push nut 20B by opening.

Then, shown in figure 18, if with push nut 20B from adapter body 10C drawing, take out back-up ring 115, then each parts is extruded by ripple spring 70C, thereby can decompose joint for corrugated tube 1C.

Each parts that is decomposed can also be categorized as by material as the sealed member of adapter body such as stainless bellows, brass and push nut, synthetic rubber system etc. and carry out recirculation, and assembling re-uses (reuse) once more.

(the 5th mode of execution)

Then, with reference to Figure 19 the 5th mode of execution is described.Figure 19 representes the 5th embodiment's of joint for corrugated tube of the present invention half-sectional view.In addition, use identical reference character with Fig. 1～identical structure of joint for corrugated tube shown in Figure 15, it explains omission.

Shown in figure 19, joint for corrugated tube 1D and the foregoing description difference are: the inner peripheral surface card that keeps the card of the L shaped holding member 72 of the section of ripple spring 70C to end protuberance 73 and adapter body 10D with compressive state ends.That is, on the inner peripheral surface of adapter body 10D, form holding member fastening groove 150, card only has card to end protuberance 73 on this holding member fastening groove 150.In addition, end protuberance 73 with card and do not insert movable member 80 at the inner peripheral surface of holding member 72 from the mode that the holding member fastening groove breaks away from.

Then, if insert bellows T, then movable member 80 slides to the inboard direction (below among the figure) of through-hole section 16, and the heavy section 81 of movable member 80 leaves from the inner peripheral surface of holding member 72.Therefore, joint for corrugated tube 1D so can reduce component number, suppresses to make original cost owing to the structure even without stopper 75 also can obtain the effect of 1C from above-mentioned joint for corrugated tube 1.

(the 6th mode of execution)

Then, with reference to Figure 20～Figure 22 the 6th mode of execution is described.Figure 20 representes the 6th embodiment's of joint for corrugated tube of the present invention half-sectional view; Figure 21 representes the 6th embodiment's of the joint for corrugated tube of the present invention stereogram figure of holding member, the half-sectional view of the construction finishing stage of the 6th embodiment's of 22 expressions joint for corrugated tube of the present invention connection bellows.In addition, the structure identical with the joint for corrugated tube shown in Fig. 1～15 used identical reference character, and it explains omission.

Shown in figure 20, joint for corrugated tube 1E and the foregoing description difference are: the section that keeps ripple spring 70C with compressive state is the inserting part 152 of holding member 72E intercalation on the inner peripheral surface that is formed at adapter body 10E of コ font roughly.In addition, be formed with the holding member mobile space 154 that has than the internal diameter in inserting part 152 big footpaths in the inboard of inserting part 152.

More specifically, holding member 72E, shown in figure 21, roughly form everywhere on outer circumferential side one end of コ font at section that card ends protuberance 73, an end of interior all sides extend to sealed member 40 inner peripheral surface and with the front end butt of bellows T.And, accommodate ripple spring 70C in the inboard of コ font.

If in joint for corrugated tube 1E, insert bellows T, then shown in figure 22, an end of interior all sides of the front end butt holding member 72E of bellows T, and then if be pressed into bellows T, then holding member 72E slides to the inboard direction of adapter body 10E.Then, slide into holding member mobile space 154, then will keep the ripple spring 70C of compressive state open in this hole enlargement from hold mode if the card of holding member 72E ends protuberance 73E.

So stopper 75E is compression seal parts 40 through the elastic force of ripple spring 70C, and then the sector part 93 of anti-avulsion parts 90 is engaged with the paddy portion of bellows T, the restriction projection of sliding simultaneously 91 hole enlargements, push nut 20B can slide.

Therefore, joint for corrugated tube 1E can form the structure even without movable member, also can realize the function of above-mentioned joint for corrugated tube, and the few joint for corrugated tube of component number.

In addition, in joint for corrugated tube 1E, connect bellows T after, movable member can not remain in through-hole section 16, so when fluids such as gas flowed, the factor that can prevent to cause the mobile pressure loss etc. was in possible trouble.

In addition; The structure of holding member 72E, stopper 75E, inserting part 152 and holding member mobile space 154 can be replaced as holding member 72, the stopper 75 of joint for corrugated tube 1,1A, 1B, 1C, the structure of movable member 80, also can access same action effect in this case.

More than, as illustrated, according to joint for corrugated tube of the present invention; Do not insert at bellows under the state of assigned position; The undergauge that stops guard ring or anti-avulsion parts perhaps limits the slip of push nut and constitutes, so that the action that can make bellows be inserted into assigned position becomes is reliable.In addition, simultaneously bellows is inserted and sealed member is compressed vertically behind the assigned position and constitute, so, also can keep long-term stabilized seal property even a little flat or distortion appears in bellows.

The shape of joint for corrugated tube of the present invention is not limited at one end have the single start thread jack of outer screw section, also can be the structure with two jacks, elbow, tooth or female thread.In addition, also can be wholely set joint structure of the present invention in the end of equipment such as aeroembolism or gasometer.

In addition, the material of each several part is not limited to illustrative material, the change that also can suit, and for example anti-avulsion parts 90C also can all form plastic article through injection moulding etc., also can be made of metal shape through punching press etc.

Claims (16)

1. joint for corrugated tube is characterized in that having:

Adapter body, it has the through hole that inserts bellows;

Push nut, the one of which end inserts said through hole, and can endwisely slipping at this through hole;

Guard ring, the one of which end is pushed by said push nut, the other end is formed with a plurality of segmentations, its front end is formed with that paddy portion with said bellows fastens can be scalable claw;

Constraint component, itself and said guard ring assembling and constitute the slip limting mechanism of the slip of the said push nut of restriction, and this constraint component card ends in said through hole;

Sealed member, it seals the outer circumferential face of said bellows;

Elastic member, its said through hole axially on capable of expansion and contraction;

Holding member and movable member, it keeps said elastic member with compressive state before inserting said bellows,

The front end of the said bellows that is inserted into said movable member inwards side direction push; Thereby make the compressive state of said elastic member open; Follow the elongation of said elastic member; Said sealed member is compressed in the axial direction, and the slip limting mechanism of said constraint component is disengaged, and said push nut becomes and can slide.

2. joint for corrugated tube as claimed in claim 1 is characterized in that,

Said slip limting mechanism is chimeric through the segmentation that makes the protuberance that is formed on the said constraint component and said guard ring; And the claw of said guard ring is remained on the hole enlargement state; When the compressive state of said elastic member is open; Follow the elongation of said elastic member, the protuberance of said constraint component breaks away from from the segmentation of said guard ring, thereby removes the restriction of sliding.

3. joint for corrugated tube as claimed in claim 1 is characterized in that,

The inboard of the constraint component in being limited to said through hole disposes said sealed member, said elastic member and said holding member and movable member; Dispose said guard ring and said push nut in the outside; When the compressive state of said elastic member is open; The elongation of said elastic member is stopped by said constraint component, thereby on said guard ring and said push nut, is not applied the application of force of said elastic member.

4. joint for corrugated tube as claimed in claim 1 is characterized in that,

The opposite the other end of an end with the slip said push nut of restriction said constraint component is formed with a plurality of sector part, when the compressive state of said elastic member is open, follows the elongation of said elastic member, and said sector part engages with the paddy portion of said bellows.

5. joint for corrugated tube is characterized in that having:

Adapter body, it has the through hole that inserts bellows;

Push nut, the one of which end inserts said through hole, and can endwisely slipping at this through hole;

Anti-avulsion parts, one of which end have the slip limting mechanism of slip of the said push nut of restriction, the other end is formed with that paddy portion with said bellows fastens can be scalable claw;

Sealed member, it seals the outer circumferential face of said bellows;

Elastic member, it is capable of expansion and contraction in the axial direction;

Holding member and movable member, it keeps said elastic member with compressive state before inserting said bellows,

The front end of the said bellows that is inserted into said movable member inwards side direction push, thereby make the compressive state of said elastic member open,

And follow the elongation of said elastic member, said sealed member is compressed in the axial direction, and the slip limting mechanism of said anti-avulsion parts is disengaged,

Said push nut becomes and can slide.

6. joint for corrugated tube as claimed in claim 5 is characterized in that,

Said anti-avulsion parts at one end are formed with the restriction projection of sliding; The part card of periphery ends in through hole; And the claw of said anti-avulsion parts remains on the hole enlargement state; When the compressive state of said elastic member is open, follow the elongation of said elastic member, the slip restriction projection of said anti-avulsion parts is to leaning on the outside diameter displacement and remove the restriction of sliding than said push nut front end.

7. joint for corrugated tube as claimed in claim 5 is characterized in that,

The inboard of the anti-avulsion parts in being limited to said through hole disposes said sealed member, said elastic member and said holding member and movable member; Dispose said push nut in the outside; When the compressive state of said elastic member is open; The elongation of said elastic member is stopped by said anti-avulsion parts, thereby on said push nut, is not applied the application of force of said elastic member.

8. joint for corrugated tube as claimed in claim 5 is characterized in that,

The other end of said anti-avulsion parts is formed with a plurality of sector part, when the compressive state of said elastic member is open, follows the elongation of said elastic member, and said sector part engages with the paddy portion of said bellows.

9. joint for corrugated tube as claimed in claim 5 is characterized in that,

The collar tube sub-assembly card that the part of the periphery of said anti-avulsion parts is inserted in this through hole ends, and is connected at the groove on groove and the outer circumferential face of being located at said push nut on the inner peripheral surface of said collar tube sub-assembly via stop ring.

10. joint for corrugated tube as claimed in claim 1 is characterized in that,

Said elastic member and said holding member and movable member are the kits of assembling in advance, this kit through section roughly L shaped and at one end be formed with holding member that card ends protuberance, end the stopper of the ring-type that the protuberance card ends with said card and support said holding member inner peripheral surface movable member and said elastic member is remained on compressive state.

11. joint for corrugated tube as claimed in claim 1 is characterized in that,

Said holding member and movable member are that section is roughly L shaped and at one end be formed with card and end the holding member of protuberance and the movable member of the inner peripheral surface of the said holding member of supporting; The inner peripheral surface card that ends protuberance and said adapter body through said card ends, and said elastic member is remained on compressive state.

12. joint for corrugated tube; It is with in each described joint for corrugated tube in the said claim 1～9 said elastic member being replaced with following structure with the holding member that compressive state keeps with the structure of movable member: by section roughly the コ font and at one end be formed with card only protuberance holding member and constitute with stopper that said card ends the ring-type that the protuberance card ends; The outer circumferential face intercalation that ends protuberance through said card remains on compressive state with said elastic member on the inner peripheral surface of said adapter body.

13. a joint for corrugated tube is characterized in that having:

Adapter body, it has the through hole that inserts bellows;

Push nut, the one of which end inserts said through hole, and can endwisely slipping at this through hole;

Pipe jointing part spare, its be formed with engage with the paddy portion of bellows can be scalable claw;

The slip limting mechanism, it limits the slip of said push nut;

Sealed member, it seals the outer circumferential face of said bellows;

Elastic member, its said through hole axially on capable of expansion and contraction;

Retaining mechanism, it keeps said elastic member with compressive state before inserting said bellows,

Insertion through said bellows; The compressive state of the open said elastic member of said retaining mechanism is followed the elongation of said elastic member, and said sealed member is compressed in the axial direction; And said slip limting mechanism is disengaged, and said push nut becomes and can slide.

14. joint for corrugated tube as claimed in claim 13 is characterized in that,

Said retaining mechanism is the kit of assembling in advance, this kit through section roughly L shaped and at one end be formed with holding member that card ends protuberance, end the stopper of the ring-type that the protuberance card ends with said card and support said holding member inner peripheral surface movable member and said elastic member is remained on compressive state.

15. joint for corrugated tube as claimed in claim 13 is characterized in that,

Said retaining mechanism is that section is roughly L shaped and at one end be formed with card and end the holding member of protuberance and the movable member of the inner peripheral surface of the said holding member of supporting; The inner peripheral surface card that ends protuberance and said adapter body through said card ends, and said elastic member is remained on compressive state.

16. joint for corrugated tube as claimed in claim 13 is characterized in that,

Said retaining mechanism is by section コ font and at one end be formed with card and end the holding member of protuberance and constitute with stopper that said card ends the ring-type that the protuberance card ends roughly; The outer circumferential face intercalation that ends protuberance through said card remains on compressive state with said elastic member on the inner peripheral surface of said adapter body.

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