CN102691840A

CN102691840A - Pipe joint

Info

Publication number: CN102691840A
Application number: CN2011100740233A
Authority: CN
Inventors: 太田浩司; 水野宏俊; 北岛典和; 中居义贵; 长谷川博一
Original assignee: ANLONG CHEMICALS Co Ltd
Current assignee: ANLONG CHEMICALS Co Ltd; Aron Kasei Co Ltd
Priority date: 2011-03-22
Filing date: 2011-03-22
Publication date: 2012-09-26
Anticipated expiration: 2031-03-22
Also published as: CN102691840B; HK1176984A1

Abstract

The invention provides a bulk type pipe joint provided with a special connecting pipe into which a confirming mechanism can be inserted, wherein the insertion of the connecting pipe and the connecting operation are simple, and the pipe joint can be used for easily and accurately grasping whether the inserted connecting pipe reaches any determined position in the pipe joint during connection. The pipe joint is characterized by being provided with a C-type annular or O-type annular part which is of a radiate extensional flexible rod-shaped part and is arranged in the accommodating part of the pipe joint. By virtue of adjusting the length of the rod-shaped part, when the connecting pipe is inserted, the annular part is pressed in an inner direction by the connecting pipe, the rod-shaped part which is previously arranged in a through hole can be pulled into an outer barrel body from the exterior of the outer barrel body, and the inserting confirming position of the length of the connecting pipe relative to the accommodating part of the pipe joint is freely changed.

Description

Pipe joint

Technical field

The present invention relates to a kind of possess connecting tube insert confirming mechanism, be used for the pipe joint that connecting tube connected with direct insertion (onetouch); Relate in particular to a kind of direct insertion pipe joint; It possesses the outer cylinder body and the inner barrel of the accommodation section of the connecting tube that is formed for packing into; The insertion of connecting tube and attended operation tube list; And have special-purpose connecting tube and insert confirming mechanism, can be correctly when connecting and easily hold the connecting tube that inserts and whether arrive the position of arbitrary decision in the pipe joint and link.

Background technique

Present known a kind of pipe joint that is used for direct insertion connection connecting tube that has.For example the real flat 4-18793 communique (patent documentation 1), TOHKEMY 2001-193883 communique (patent documentation 2), TOHKEMY 2003-227592 communique (patent documentation 3) opened of JP discloses a kind of direct insertion pipe joint; It is characterized in that; At the inboard cylindrical shell of concentric arrangement with possess that between the outside cylindrical shell of the conical surface that inserts mouthful undergauge, be built-in with can be at the lock ring of axially movable tubular, said lock ring has and is used for card and ends the thrusts such as tooth or pawl of connecting tube.In the pipe joint of this pipe, after connecting tube being inserted into deep, through toward pulling back, lock ring is moved near inserting mouthful.Then, with the insertion mouth of outside cylindrical shell near under the interaction of the conical surface that forms, the jut through making lock ring prevents coming off of connecting tube with the mode undergauge of the outer circumferential face of the connecting tube of nipping.

The disclosed content of TOHKEMY 2005-172218 communique (patent documentation 4) has the roughly the same structure of pipe joint with above-mentioned patent documentation 1-3 record, and it discloses a kind of direct insertion pipe joint of type that is used for holding from medial branch the inboard cylindrical shell of the connecting tube that is inserted into pipe joint inside that do not have.

In addition, WO2006/135227 communique (patent documentation 5) has been put down in writing other variation of the pipe joint of a kind of above-mentioned patent documentation 1～3 record.In the direct insertion pipe joint of patent documentation 5 records; The outside sleeve and inboard sleeve all have make the gap stenosis of inserting mouthful narrow towards the conical surface; And; For the connecting tube of can between them, packing into, the lock ring (1ock ring) of the tubular that will be made up of the outside clamp ring with tooth and concentric arrangement (grip ring) and inboard clamp ring and the bottom that links two clamp rings in deep is configured to and can moves in the axial direction.

And then; Having as the inside at pipe joint can be at the direct insertion pipe joint beyond the type of axially movable lock ring, the known direct insertion pipe joint that has TOHKEMY to equal that kind of record in 9-236190 communique (patent documentation 6), TOHKEMY 2006-118704 communique (patent documentation 7), the TOHKEMY 2008-164074 communique (patent documentation 8).The direct insertion pipe joint of patent documentation 6-8 record is for the accommodation section of the connecting tube that is formed for packing into; Constitute by the outside cylindrical shell of concentric arrangement and the inboard cylindrical shell that extends from adapter body; Be fixed with the lock ring of ring-type at the outer circumferential face of inboard cylindrical shell, the inner peripheral surface that the lock ring of this ring-type has through the connecting tube of nipping prevents tooth or the pawls that are radial extension that connecting tube comes off, a plurality of.

In addition; Though have basically pipe joint identical construction with above-mentioned patent documentation 6-7 record; But as the record of TOHKEMY 2002-106772 communique (patent documentation 9), TOHKEMY 2003-307290 communique (patent documentation 10), also known a kind of lock ring with ring-type of a plurality of teeth or pawl is not nip outer circumferential face and the direct insertion pipe joint of the type that is fixed of connecting tube of the inner peripheral surface of cylindrical shell from the outer circumferential face of inboard cylindrical shell but from the outside.

And then; The inventor etc. as the improved products of the pipe joint of patent documentation 1-10 record as TOHKEMY 2010-230094 communique (patent documentation 11) record; Direct insertion pipe joint to following proposes patent application, and this pipe joint is characterised in that, crooked lock ring is set in the connecting tube accommodation section of pipe joint; This lock ring is out of shape to axial elongation ground to radially the time being pressed; And when inserting connecting tube, through with the interaction of on every side awl wall, the free end of lock ring with claw is with the inner peripheral surface of crimping connecting tube and/or the mode displacement of outer circumferential face.

For these pipe joints; For the pipe that constitutes by plastic materials with direct insertion connection with respect to pipe joint or have the three layers of connecting tubes such as pipe of aluminium of structure that clip the table back side of aluminium with plastic materials; Need said connecting tube be inserted into the position of the regulation in the pipe joint, the pipe joint that perhaps needs to be inserted into assigned position is withdrawn into the position that the pawl of lock ring is nipped.If the assigned position in the connecting tube no show pipe joint that inserts then possibly produce connecting tube and break away from from pipe joint easily, or and pipe joint between cause the problem of poor sealing.

But, confirm that in general whether connecting tube is inserted in the pipe joint is fairly simple, but whether the connecting tube that affirmation is inserted arrives assigned position and is not easy.Therefore;, finishes the connecting tube that inserts attended operation before arriving the assigned position in the pipe joint; Or in contrast; Although insert action is also continued in the deep that connecting tube arrives in the pipe joint, such result applies excessive loading on pipe joint or connecting tube, have their ruined problems.

In addition; In order to address the above problem; Confirm as making whether the connecting tube that inserts arrives the means of the assigned position facilitation in the pipe joint; As flat 11-132374 communique (patent documentation 12) record of TOHKEMY, known a kind of pipe joint that on the outer cylinder body of pipe joint, is provided with the type of the affirmation hole that is used for through the visual front position of confirming to be in the connecting tube that connects finishing stage from the outside or transparent part.

In addition; Individually as needing special-purpose connecting tube to insert the example of confirming mechanism; Real bar-shaped insertion that kind, movable chimeric in the through hole of pipe joint outer cylinder body (loosening chimeric) of opening flat 6-62292 communique (patent documentation 13), TOHKEMY 2001-324071 communique (patent documentation 14), TOHKEMY 2002-89759 communique (patent documentation 15) record of the known JP of having confirms that the end of the connecting tube that parts are inserted into boosts, and to the pipe joint of the outstanding type in the outside of outer cylinder body.And then; That kind of also known TOHKEMY 2009-19645 communique (patent documentation 16) record, confirm that from the outside outstanding bar-shaped insertion of the inside subtend of pipe joint the connecting tube that seal ring that parts support is inserted into removes, the insertion that the result loses supporting ring confirms that parts are from the submerge pipe joint etc. of the type the through hole of the outer circumferential face of outer cylinder body.

But; It only is could confirm in the position that disposes affirmation hole or connecting tube insertion confirming mechanism whether the connecting tube that inserts arrives that the pipe joint of these types or connecting tube insert confirming mechanism; The position of for example in the intermediate portion of accommodation section or deep etc., pipe joint, confirming arbitrarily just can't confirm whether connecting tube arrives.

In addition, under the situation of the pipe joint of the type of the insertion state through the Visual Confirmation connecting tube, existing in the dark or put under house arrest place etc. can't effective acting problem.And then; Insert at the special-purpose connecting tube of needs under the situation of pipe joint of type of confirming mechanism; Because its constructional restriction; Can't get big insertion and confirm parts, therefore also have the operator can't correctly confirm the problem of the concavo-convex state of said insertion affirmation parts to the overhang (projecting height) of outside or to the inner amount of submerging (submerged depth) of through hole.

The existing technology document

Patent documentation

Real the opening of patent documentation 1:JP put down the 4-18793 communique

Patent documentation 2:JP spy opens the 2001-193883 communique

Patent documentation 3:JP spy opens the 2003-227592 communique

Patent documentation 4:JP spy opens the 2005-172218 communique

Patent documentation 5:WO2006/135227 communique

Patent documentation 6:JP spy opens flat 9-236190 communique

Patent documentation 7:JP spy opens the 2006-118704 communique

Patent documentation 8:JP spy opens the 2008-164074 communique

Patent documentation 9:JP spy opens the 2002-106772 communique

Patent documentation 10:JP spy opens the 2003-307290 communique

Patent documentation 11:JP spy opens the 2010-230094 communique

Patent documentation 12:JP spy opens flat 11-132374 communique

Real the opening of patent documentation 13:JP put down the 6-62292 communique

Patent documentation 14:JP spy opens the 2001-324071 communique

Patent documentation 15:JP spy opens the 2002-89759 communique

Patent documentation 16:JP spy opens the 2009-19645 communique

Summary of the invention

Therefore; The present invention solves the problem points of above-mentioned that kind; Its purpose is to provide a kind of insertion of connecting tube and attended operation simple, and possess can be correctly when connecting and easily hold the direct insertion pipe joint that connecting tube that whether connecting tube that inserts arrive the special use of the position of arbitrary decision in the pipe joint inserts confirming mechanism.

Therefore, the inventor etc. carries out active research to the direct insertion pipe joint that possesses special-purpose connecting tube and insert confirming mechanism.The result finds; The C type ring-type of the bar-like member through will having the flexibility that is radial extension or the part of O type ring-type are configured in the accommodation section of pipe joint; Regulate the length of said bar-like member; Thereby when inserting connecting tube, direction in the part connected tube of said ring-type is pressed into, and draw in inside from the outside of outer cylinder body through the bar-like member that will be arranged at through hole in advance; Can freely change connecting tube and confirm the position, thereby accomplish pipe joint of the present invention with respect to the insertion of the accommodation section length of pipe joint.

Promptly; According to the present invention; A kind of direct insertion pipe joint is provided, and it possesses adapter body, the outer cylinder body and the inner barrel of the accommodation section of the connecting tube that is formed for packing into, be used to confirm that the connecting tube of the insertion state of said connecting tube inserts confirming mechanism, it is characterized in that; Said insertion confirming mechanism is by constituting like the bottom: through hole, and it connects the inner peripheral surface and the outer circumferential face of said outer cylinder body; Slot part, it is formed on the inner peripheral surface of said outer cylinder body, and extends to the axial inner side from said through hole; And parts are confirmed in the insertion of C type ring-type or O type ring-type; It has the bar-like member of the flexibility that is radial extension; And be configured in the said accommodation section in the axial direction movably; Before connecting tube inserted, it is outstanding that said bar-like member is configured to from said through hole the outside to said outer cylinder body, when connecting tube inserts; Said bar-like member is pressed into the axial inner side through the front end by said connecting tube with said insertion affirmation parts, thereby is drawn into the mode of to the said slot part that the inner peripheral surface at said outer cylinder body forms, accommodating from the outside of said outer cylinder body.

Insert in the direct insertion pipe joint of confirming mechanism at the connecting tube that possesses special use of the present invention; Confirm that from the insertion of C type ring-type or O type ring-type parts are the bar-like member of the flexibility of radial extension; A-stage before inserting connecting tube is configured in the accommodation section of pipe joint to the outstanding mode in outside with the through hole from outer cylinder body.Therefore; Usually; The insertion that links to each other with bar-like member confirm component configuration the through hole of outer cylinder body roughly under; And bar-like member can freely change from the outstanding outstanding length of outer cylinder body outer circumferential face through regulating its length, makes the operator can confirm the preceding A-stage of connecting tube insertion easily.

On the other hand, in the time of in the accommodation section of connecting tube insertion tube joint, insert confirm parts since occupy the cross section, accommodation section all or part of and with the front end butt of connecting tube, be pressed into the deep of pipe joint accommodation section then.At this moment, because bar-like member and insert to confirm that article body links to each other is confirmed moving of parts so be accompanied by to insert, bar-like member, be pressed in the slot part that the inner peripheral surface of outer cylinder body forms, thereby quilt is accommodated through through hole from the outside of said outer cylinder body.

Therefore, operator's vision capable of using or finger etc. confirm to become the through hole of empty outer cylinder body, can be easily and correctly hold the connecting tube that inserts whether with respect to pipe joint arrive regulation the position, connect and whether accomplish.

So, insert confirming mechanism as long as the length adjustment of bar-like member become the distance between the through hole of front position and outer cylinder body of the connecting tube when accomplishing equal in fact at the connecting tube that the present invention uses with being connected of connecting tube.Thus, when the connecting tube that inserts arrived it and connects the position of finishing fully, bar-like member all was drawn into the through hole from the outside of outer cylinder body, perhaps was drawn in the slot part that the inner peripheral surface at outer cylinder body forms through through hole, thereby was accommodated.So, pipe joint of the present invention inserts the length of the bar-like member of confirming mechanism through regulating connecting tube, can freely change connecting tube with respect to the insertion depth of the accommodation section length of pipe joint, be the insertion affirmation position of connecting tube.

In addition, can confirm that article body disposes a plurality of bar-like members, at this moment, the corresponding through hole of quantity and position with bar-like member need be set on outer cylinder body with respect to inserting.

In addition; Needn't make the length of bar-like member tight identical to the distance of the front position of connecting tube with through hole; " in fact " equate with regard to enough reasons be: in fact exist the degree of depth (thickness of outer cylinder body) of through hole, or bar-like member is bent and the stretching, extension when being drawn into, the curvature of curved part etc. produce the essential factor of error.

In the present invention, on the inner peripheral surface of outer cylinder body, form slot part from through hole towards the axial inner side at least.If on the inner peripheral surface of outer cylinder body, be not formed with slot part; Then can cause following unfavorable condition: be accompanied by the insertion of connecting tube and the bar-like member that is drawn in the accommodation section is sandwiched between the outer circumferential face of the inner peripheral surface of outer cylinder body and connecting tube; Hinder the further insertion of connecting tube, or drawn broken (drawing I Chi ぎゐ).

In addition; In the present invention; As the space between the outer circumferential face of inner peripheral surface that is arranged on outer cylinder body in order to draw in bar-like member and connecting tube, be not to utilize the clearance portion that produces owing to the diameter difference between the external diameter of the internal diameter of outer cylinder body and connecting tube, but form other slot part.Its reason is: if utilize clearance portion, then rock (rickety) because of the connecting tube after inserting and the clearance portion between the outer cylinder body produce, just can't firmly fix connecting tube.On the other hand; With respect to this; Part at the inner peripheral surface of outer cylinder body forms under the situation of slot part, owing to can the internal diameter of outer cylinder body be designed to the size roughly the same with the external diameter of connecting tube, so the insertion of the connecting tube that can realize not rocking and fixing.In addition; External diameter than connecting tube; Set the internal diameter of outer cylinder body bigger; And on the inner peripheral surface of outer cylinder body, be provided with have the end that on the outer circumferential face of connecting tube, roughly stops, be a plurality of ribs of radial extension from the inner peripheral surface of outer cylinder body, also can form the slot part that prevents to rock and be used for drawing in bar-like member thus.

And then, also can be through the internal diameter of outer cylinder body being set greater than the external diameter of connecting tube, wherein install and have the slit that extends vertically and have the sleeve with the internal diameter of the external diameter same size of connecting tube, thereby form the slot part of outer cylinder body.That is the slit part after, sleeve is installed forms slot part on the cylindrical shell inner peripheral surface outside.

The O type shape on the inner peripheral surface of outer cylinder body is normally connected airtight in the cross section of sleeve.But, under situation of the present invention, easy property consider to be installed, can be made into the C type shape that the part with the cross section cuts, when making on the inner peripheral surface that sleeve is installed on outer cylinder body, can make its external diameter than small deformation.

The use of above-mentioned such sleeve can improve the formability of outer cylinder body or insert the installation property of inner bodies such as confirming parts, lock ring, seal ring.Especially under the situation of the pipe joint of the type of the lock ring of stating after the use, be used for that the limited lock hoop is axially movable also can be formed on the inner peripheral surface of outer cylinder body easily with fixed wall radial parallel, so convenient.

In the present invention, bar-like member be accompanied by insert to confirm parts to the moving of axial inner side, on one side be out of shape on one side with the mode of warpage and accommodated among the slot part on the outer cylinder body inner peripheral surface.Therefore, bar-like member and comprise it and confirm parts preferably by having ductility and the strong material of stretch-proof stress in interior insertion, as such material, can give an example thermoplastic elastomer or synthetic rubber or natural rubber etc.Especially under the situation of thermoplastic elastomer; Generally, little to the stretching, extension of certain loading than synthetic rubber or natural rubber, therefore; Be suitable for as keeping the material of the bar-like member that requirement is out of shape with the warpage mode with when the corresponding length in position is confirmed in the insertion of connecting tube.

In addition, for the deformation characteristic of the height that obtains bar-like member, also can its cross section be processed that kind such as flat pattern and make its easy warpage through shape is improved.Especially bar-like member confirms that through making with the insertion of ring-type near the section area stenosis the root of article body is narrow; Or make its thin-walled property etc.; Formation has the approximate hinge structure of the section area littler than other parts, thereby can obtain the high warpage characteristic at the initial stage of drawing in.

And then the shape of the front end of bar-like member etc. is not particularly limited, because the operator can confirm easily through finger etc., so its shape can form the shape that the shape that makes front end comes to a point or have the shape that concavo-convex surface etc. can stimulate for finger.In addition, in order to improve visual visibility, also can the front end of bar-like member or bar-like member be coloured to showy colors such as iridescent.

Connecting tube with special use of the present invention inserts the direct insertion pipe joint of confirming mechanism can be by constituting like lower pipe connection: it is characterized in that; Said pipe joint also comprises said inner barrel and inboard lock ring; Said inner barrel also has with the fixed wall of radial parallel with towards the awl wall of the continuous hole enlargement of axial outer side at outer circumferential face; Said inboard lock ring is the cylinder with the free-ended a plurality of slits that are used to form overhang (cantilever); And have when said connecting tube inserts through the resiliently deformable of said cylinder push said connecting tube inner peripheral surface the first export-oriented claw and be disposed at said free end, card ends said connecting tube when the said connecting tube drawing the second export-oriented claw; And said inboard lock ring is configured between the fixed wall of said inner barrel and awl wall, can move in the axial direction; After said connecting tube is inserted into the assigned position of said accommodation section; When the drawing direction moves, thereby said inboard lock ring moves to the drawing direction with said connecting tube through the inner peripheral surface that the said first export-oriented claw is limited to said connecting tube, and the free end of said inboard lock ring gets into the awl wall zone of said inner barrel; Then through and said awl wall between interaction, said inboard lock ring is with the mode hole enlargement of the said second export-oriented claw crimping to the inner peripheral surface of said connecting tube.

In addition; As other a mode; Connecting tube with special use of the present invention inserts the direct insertion pipe joint of confirming mechanism can be by constituting like lower pipe connection: it is characterized in that; Said pipe joint also comprises said outer cylinder body and outside lock ring; Said outer cylinder body also has with the fixed wall of radial parallel with towards the awl wall of the continuous undergauge of axial outer side at inner peripheral surface; Said outside lock ring is the cylinder with the free-ended a plurality of slits that are used to form overhang (cantilever); And have when said connecting tube inserts the outer circumferential face of pushing said connecting tube through the resiliently deformable of said cylinder first in to claw and be disposed at said free end, during in said connecting tube drawing card end said connecting tube second in to claw; And said outside lock ring is configured between the fixed wall of said outer cylinder body and awl wall, can move in the axial direction, after said connecting tube is inserted into the assigned position of said accommodation section, when the drawing direction moves; Thereby said outside lock ring moves to the drawing direction with said connecting tube through the outer circumferential face that is limited to said connecting tube to claw in said first; The free end of said outside lock ring gets into the awl wall zone of said outer cylinder body, then through and said awl wall between interaction, said outside lock ring is with will said second interior to the mode undergauge of claw crimping to the outer circumferential face of said connecting tube.

And then; As other a mode; Connecting tube with special use of the present invention inserts the direct insertion pipe joint of confirming mechanism can be by constituting like lower pipe connection: it is characterized in that; Said pipe joint also comprises said inner barrel, said outer cylinder body, inboard lock ring and outside lock ring; Said inner barrel also has with the fixed wall of radial parallel with towards the awl wall of the continuous hole enlargement of axial outer side at outer circumferential face; Said outer cylinder body also has with the fixed wall of radial parallel with towards the awl wall of the continuous undergauge of axial outer side at inner peripheral surface; Said inboard lock ring is the cylinder with the free-ended a plurality of slits that are used to form overhang; And have when said connecting tube inserts through the resiliently deformable of said cylinder push said connecting tube inner peripheral surface the first export-oriented claw and be disposed at said free end, card ends said connecting tube when the said connecting tube drawing the second export-oriented claw; And said inboard lock ring is configured between the fixed wall of said inner barrel and awl wall, can move in the axial direction; Said outside lock ring is the cylinder with the free-ended a plurality of slits that are used to form overhang; And have when said connecting tube inserts the outer circumferential face of pushing said connecting tube through the resiliently deformable of said cylinder first in to claw and be disposed at said free end, during in said connecting tube drawing card end said connecting tube second in to claw; And said outside lock ring is configured between the fixed wall of said outer cylinder body and awl wall, can move in the axial direction, after said connecting tube is inserted into the assigned position of said accommodation section, when the drawing direction moves; Thereby said inboard lock ring moves to the drawing direction with said connecting tube through the inner peripheral surface that the said first export-oriented claw is limited to said connecting tube; The free end of said inboard lock ring gets into the awl wall zone of said inner barrel, then through and said awl wall between interaction, said inboard lock ring is with the mode hole enlargement of the said second export-oriented claw crimping to the inner peripheral surface of said connecting tube; And thereby said outside lock ring moves to the drawing direction with said connecting tube through the outer circumferential face that is limited to said connecting tube to claw in said first; The free end of said outside lock ring gets into the awl wall zone of said outer cylinder body, then through and said awl wall between interaction, said outside lock ring is with will said second interior to the mode undergauge of claw crimping to the outer circumferential face of said connecting tube.

In the present invention; Also comprise under the situation of pipe joint of structure of inboard lock ring and/or outside lock ring etc. using as above-mentioned, to have in inside; Adapter body, inner barrel and outer cylinder body all have the shape of tubular; Wherein, adapter body also can comprise inner barrel, and integrally formed with inner barrel.In addition, preferred adapter body and inner barrel portion within it have the passage opening portion that supplies the mobile usefulness of fluid, and its front end has funnel shaped for the resistance that reduces fluid.And then under the situation aspect the productivity of paying attention to pipe joint or the cost etc., adapter body, inner barrel and outer cylinder body also can integrally formed its all parts.

Under the situation of the type that the outer cylinder body of pipe joint separates from adapter body, outer cylinder body can reliably chimeric rotatably (firmly chimeric) in adapter body, perhaps also can rotate in a circumferential direction movable freely chimeric (it is chimeric to relax).Under outer cylinder body being mounted to respect to adapter body rotation situation freely, the pipe joint of the type can be eliminated easily when connecting or connect flexural stress or the running torque that the back connecting tube receives, and therefore can tackle failing stress more flexibly.

In addition, adapter body, inner barrel and/or the material of outer cylinder body be so long as getting final product of comparison hard, not special the qualification, but preferably be shaped by plastic materials or metallic material.Especially under situation about being shaped, more preferably use PPSU (PPSU) resin or polyphenylene sulfide (PPS) resin as material by plastic materials.

Adapter body and the outer cylinder body that comprises inner barrel is configured in in the heart, and the accommodation section of the connecting tube that between inner barrel and outer cylinder body, is formed for packing into.And, in the accommodation section of pipe joint, disposing the lock ring that can move in the axial direction, this lock ring to have connecting tube and to end connecting tube and acting second claw in order blocking in order to push its side face when acting first claw is with the connecting tube drawing when inserting.In addition; As long as this lock ring is installed on arbitrary side of inner peripheral surface of outer circumferential face or outer cylinder body of inner barrel; But; For since adhering to, trampling etc. of the falling of pipe joint, solvent and might cause a side the lock ring breakage the time can reliably control connecting tube, preferably lock ring is configured on its both sides.

Therefore, for the outer circumferential face at inner barrel disposes inboard lock ring and it can be moved in the axial direction, form with the fixed wall of radial parallel with towards the awl wall of the continuous hole enlargement of axial outer side.In addition, at the inner peripheral surface of outer cylinder body configuration outside lock ring and it can be moved in the axial direction, form with the fixed wall of radial parallel with towards the awl wall of the continuous undergauge of axial outer side.And through inboard lock ring of configuration and/or outside lock ring between fixed wall and awl wall; One end (fixed end) of inboard lock ring and/or outside lock ring because and the relation between the fixed wall of the inner peripheral surface of the outer circumferential face of inner barrel and/or outer cylinder body; Thereby be limited in fact to axial moving; And the other end (free end) because and the relation of awl between the wall, allow to axial moving.Therefore, the fixed end of inboard lock ring and/or outside lock ring disposes to such an extent that more lean on axial part inboard than free end, when free end configuration drawing, is used for card to end second claw of connecting tube.

The inboard lock ring that is disposed at the outer circumferential face of inner barrel is made up of cylinder, and the end incision from cylinder has a plurality of slits for the free end that forms overhang (cantilever) at its body.In addition, inboard lock ring has when connecting tube inserts for the inner peripheral surface of pushing connecting tube through resiliently deformable the acting first export-oriented claw and actingly in order only to block connecting tube when the connecting tube drawing is disposed at the said free-ended second export-oriented claw.

Pressing function about the first export-oriented claw; The bellying of inboard lock ring is because its axial sectional shape has looper (measuring worm; Looper) shape of that kind; So can be crooked when being pressed, and under its reaction force acts, the inner peripheral surface appropriateness of the connecting tube that inserts be pushed to radially inner side.In addition, slit is owing to extend with the mode of the body that connects inboard lock ring in the axial direction, so each bellying mutual noninterference of being cut apart by slit, resiliently deformable is easy.

The result is after the assigned position of the accommodation section that connecting tube is inserted into pipe joint, when when the drawing direction moves, because the first export-oriented claw is limited to the inner peripheral surface of connecting tube, so inboard lock ring also moves to the drawing direction with connecting tube.And the free end of inboard lock ring gets into to the awl wall of inner barrel zone, through with the interaction of awl wall, inboard lock ring is with the mode hole enlargement of the second export-oriented claw to the inner peripheral surface crimping of connecting tube.

And; In the pipe joint of the type; The first export-oriented claw is by the body abutment of inboard lock ring; Push the inner peripheral surface of the connecting tube of insertion with appropriateness, the second export-oriented claw is retreated and by the free and bearing of inboard lock ring with the mode that contacts with inner circumferential surface hardly after inserting connecting tube, not when the drawing direction moves.And when inserting connecting tube, connecting tube is little from the insertion resistance that the first export-oriented claw receives, when connecting tube when the drawing direction moves, connecting tube is ended by card reliably and securely with the interaction of awl wall through the second export-oriented claw.

On the other hand, the outside lock ring that is disposed at the inner peripheral surface of outer cylinder body is made up of cylinder, and the end incision from cylinder has a plurality of slits for the free end that forms overhang (cantilever) at its body.When in addition, outside lock ring has when connecting tube inserts for the outer circumferential face of pushing connecting tube through resiliently deformable in acting first to claw and in the connecting tube drawing in order only to block connecting tube acting being disposed in said free-ended second to claw.

About the first interior pressing function to claw; The narrowing portion (reentrant part) of outside lock ring is because its axial sectional shape has the such shape of looper; So can be crooked when being pressed, and under its reaction force acts, the outer circumferential face appropriateness of the connecting tube that inserts be pushed to radial outside.In addition, slit is owing to extend with the mode of the body that connects outside lock ring in the axial direction, so each narrowing portion mutual noninterference of being cut apart by slit, resiliently deformable is easy.

The result is after the assigned position of the accommodation section that connecting tube is inserted into pipe joint, when when the drawing direction moves, owing to be limited to the outer circumferential face of connecting tube to claw in first, so outside lock ring also moves to the drawing direction with connecting tube.And the free end of outside lock ring gets into to the awl wall of outer cylinder body zone, through with the interaction of awl wall, outside lock ring with in second to the mode undergauge of claw to the outer circumferential face crimping of connecting tube.

And; In the pipe joint of the type; First is interior to the body abutment of claw by outside lock ring; Push the outer circumferential face of the connecting tube of insertion with appropriateness, after claw is inserting connecting tube, not when the drawing direction moves, retreat and by the free and bearing of outside lock ring in second with the mode that contacts with its outer circumferential face hardly.And when inserting connecting tube, the insertion resistance that connecting tube receives to claw in first is little, when connecting tube when the drawing direction moves, connecting tube is through being ended by card reliably and securely with the interaction of awl wall to claw in second.

And situation with inboard lock ring and outside lock ring both sides under; First export-oriented claw of inboard lock ring and outside lock ring first in can be configured to mutually different in the axial direction position to claw and push connecting tube, perhaps also can be configured to push connecting tube in mutual relative position.In addition; With same in the first export-oriented claw and first to claw; Second export-oriented claw of inboard lock ring and outside lock ring second in also can be configured to mutually different in the axial direction position card to claw and end connecting tube, perhaps also can be configured to end connecting tube at mutual relative position card.

But the Applicable scope that the connecting tube that uses in the present invention inserts confirming mechanism is not limited to the pipe joint that above-mentioned that kind has the type of inboard lock ring and/or outside lock ring.For example applicable to constituting by the outside cylindrical shell of concentric arrangement and the inboard cylindrical shell that extends from adapter body for the accommodation section that forms the connecting tube of packing into; And be fixed with the pipe joint of type of the lock ring of ring-type at the inner peripheral surface of the outer circumferential face of inboard cylindrical shell or outside cylindrical shell; Wherein said lock ring has for the inner peripheral surface of the connecting tube of nipping or outer circumferential face and is a plurality of teeth or the pawl of radial extension; Also go at the inboard cylindrical shell of concentric arrangement and possess the pipe joint etc. of the type of the lock ring that between the outside cylindrical shell of the conical surface that inserts mouthful undergauge, is built-in with the tubular that can move in the axial direction; Wherein said lock ring has and is used to the thrusts such as tooth or pawl that card ends connecting tube; The form that connecting tube of the present invention inserts confirming mechanism and lock ring has nothing to do, and can both be suitable for regardless of the pipe joint that is which kind of type.In addition, if form the structure of the accommodation section of connecting tube, then do not possess the pipe joint of the type of lock ring applicable to inside by outer cylinder body and inner barrel yet.

Pipe joint of the present invention preferably possesses on the inner peripheral surface of the outer circumferential face of inner barrel and/or outer cylinder body and is used at least one seal ring that the gap to itself and connecting tube seals.Generally on the inner peripheral surface of the outer circumferential face of inner barrel and/or outer cylinder body, be provided with slot part, seal ring is fixed through being housed in this slot part.The seal ring of various sectional shapes such as in addition, the sectional shape of seal ring has the O type less than limiting especially, can adopting, square, matrix, lip shape.

Especially; Under the situation of the pipe joint of the type of inboard lock ring with above-mentioned that kind and/or outside lock ring; As the lock ring of pipe joint or ring-type of type of lock ring with existing movable type is at the pipe joint of the type of internal fixation; When connecting tube inserts, the inner peripheral surface of connecting tube or outer circumferential face hardly can be owing to the claw of lock ring dark damaged, therefore can obtain high sealing effect.

According to other aspects of the invention; A kind of direct insertion pipe joint is provided; It is characterized in that; Its insertion by adapter body, inner barrel, outer cylinder body, lock ring and C type ring-type or O type ring-type confirms that parts constitute, and said inner barrel extends to axial outer side from said adapter body, on the inner peripheral surface of said outer cylinder body, has through hole that connects inner and outer circumferential surfaces and the slot part that extends to the axial inner side from said through hole; And said outer cylinder body is configured in the outside of said inner barrel; Between said outer cylinder body and said inner barrel, be formed for packing into the accommodation section of connecting tube, said lock ring is through preventing coming off of said connecting tube with respect to the inner peripheral surface of the connecting tube that inserts said accommodation section and/or the thrust that outer circumferential face crimping front end comes to a point, the bar-like member that parts have the flexibility that is radial extension is confirmed in said insertion; And be configured in the said accommodation section in the axial direction movably; Before connecting tube inserted, it is outstanding that said bar-like member is configured to from said through hole the outside to said outer cylinder body, when connecting tube inserts; Said bar-like member is through confirming that with said insertion parts are pressed into the axial inner side by the front end of said connecting tube; Thereby the mode to accommodate to the said slot part that the inner peripheral surface at said outer cylinder body forms from the outside of said outer cylinder body is drawn into, and confirms the length of the bar-like member of parts through regulating said insertion, can freely change said connecting tube and confirm the position with respect to the insertion of the accommodation section length of said pipe joint.

In the direct insertion pipe joint of the type; Confirm that from the insertion of C type ring-type or O type ring-type parts are the bar-like member of the flexibility of radial extension; Under the A-stage before inserting connecting tube, be configured in the accommodation section of pipe joint to the outstanding mode in outside with through hole from outer cylinder body.Therefore; Usually; The insertion that links to each other with bar-like member confirm component configuration the through hole of outer cylinder body roughly under; And bar-like member can freely change from the outstanding outstanding length of outer cylinder body outer circumferential face through regulating its length, makes the operator can confirm the preceding A-stage of connecting tube insertion easily.

On the other hand, in the time of in the accommodation section of connecting tube insertion tube joint, insert confirm parts since occupy the cross section, accommodation section all or part of and with the front end butt of connecting tube, be pressed into the deep of pipe joint accommodation section then.At this moment, because bar-like member and insert to confirm that parts link to each other is confirmed moving of parts so be accompanied by to insert, bar-like member, be pressed in the slot part that the inner peripheral surface of outer cylinder body forms, thereby quilt is accommodated through through hole from the outside of said outer cylinder body.

In addition, in the pipe joint of the type, as long as the distance that will insert between the through hole of front position and outer cylinder body that the length adjustment of the bar-like member of confirming the parts part becomes the connecting tube when accomplishing with being connected of connecting tube is equal in fact.Thus, when the connecting tube that inserts arrived it and connects the position of finishing fully, bar-like member all was drawn into the through hole from the outside of outer cylinder body, perhaps was drawn in the slot part that the inner peripheral surface at outer cylinder body forms through through hole, thereby was accommodated.So, pipe joint of the present invention inserts the length of the bar-like member of confirming mechanism through regulating connecting tube, can freely change connecting tube with respect to the insertion depth of the accommodation section length of pipe joint, be the insertion affirmation position of connecting tube.

The invention effect

According to the present invention; A kind of direct insertion pipe joint that special-purpose connecting tube inserts confirming mechanism that possesses can be provided; C type ring-type or the part of O type ring-type that will have the bar-like member of the flexibility that is radial extension are configured in the accommodation section of pipe joint; Through regulating the length of said bar-like member; Direction in said annular element connected tube is pressed into when connecting tube inserts, the bar-like member that is provided with in advance at through hole is drawn into inside from the outside of outer cylinder body, confirms the position thereby can freely change connecting tube with respect to the insertion of the accommodation section length of pipe joint.

The result is, the through hole of the outer cylinder body that operator's vision capable of using or finger etc. are confirmed to become empty, can be easily and correctly hold the connecting tube that inserts whether with respect to pipe joint arrive regulation the position, connect and whether accomplish.

Description of drawings

Fig. 1 is the pipe joint of a mode of execution of the present invention, be upper half part represent state and lower half portion before connecting tube inserts represent after connecting tube inserts state, at the sectional view of the situation of cutting through the cross section of its central shaft;

Fig. 2 is the stereogram that parts are confirmed in the insertion of in the embodiment's of Fig. 1 accommodation section, disposing;

Fig. 3 is the stereogram of the sleeve on the inner peripheral surface of the embodiment's of Fig. 1 outer cylinder body, installed;

Fig. 4 is the stereogram that parts are confirmed in other embodiments' insertion;

Fig. 5 is the stereogram of other embodiments' sleeve;

Fig. 6 is the embodiment's of presentation graphs 1 the stereogram of inboard lock ring;

Fig. 7 is with the inboard lock ring of Fig. 6 sectional view in the situation of cutting through the cross section of central shaft;

Fig. 8 is the embodiment's of presentation graphs 1 the stereogram of outside lock ring;

Fig. 9 is with the outside lock ring of Fig. 8 sectional view in the situation of cutting through the cross section of central shaft;

Figure 10 is the pipe joint of another embodiment of the present invention, be upper half part represent state and lower half portion before connecting tube inserts represent after connecting tube inserts state, at the sectional view of the situation of cutting through the cross section of its central shaft.

Symbol description

1,1 ' direct insertion pipe joint

2 sockets

3 adapter body

30 passage opening portions

31 front ends

4 inner barrels

5 outer cylinder bodies

50 through holes

51 central shafts

6 connecting tubes insert confirming mechanism

7 sleeves

70 ends

71 slits, slot part

8 insert the affirmation parts

80 insert the affirmation article body

81 bar-like members

10 connecting tubes

11 inboard lock rings

110 bellyings

111 slits

112 first export-oriented claws

113 second export-oriented claws

12 outside lock rings

120 narrowing portions

121 slits

122 first is interior to claw

123 second is interior to claw

13 accommodation sections

14 deeps

15,15 ' seal ring

16,16 ' slot part

17 fixed outside lock rings

Embodiment

Below, the direct insertion pipe joint of a mode of execution of the present invention is elaborated with reference to accompanying drawing.And the present invention is not limited to the embodiment shown in following, in the scope that does not break away from technological thought of the present invention, can carry out various changes.

[embodiment]

Embodiment 1

Fig. 1 is that expression possesses the direct insertion pipe joint 1 that connecting tube inserts an of the present invention preferred mode of execution of confirming mechanism 6; State before upper half part is represented the connecting tube insertion and lower half portion are represented the state after connecting tube inserts, and the sectional view of the situation of cutting in the cross section of passing through its central shaft.Can know with reference to figure 1, insert socket 2 as long as pipe joint of the present invention 1 possesses at least one connecting tube, therefore not only be defined in the I font as its whole shape, also can be T font, cross.

Pipe joint 1 comprises that adapter body 3, inner barrel 4, outer cylinder body 5, inboard lock ring 11 and outside lock ring 12, connecting tube insert confirming mechanism 6, and any part all has the shape of tubular roughly or ring-type.In addition, in present embodiment 1, adapter body 3 comprises inner barrel 4, and through injection moulding and integrally formed.Adapter body 3 and inner barrel 4 portion within it have the passage opening portion 30 that is used to supply fluid to flow, and its front end 31 has funnel shaped for the resistance that reduces fluid.And then under the situation aspect the productivity of paying attention to pipe joint 1 or the cost etc., adapter body 3, inner barrel 4 and outer cylinder body 5 also can be through integrally formed its all parts such as injection mouldings.

The connecting tube that uses at present embodiment 1 inserts sleeve 7 that confirming mechanism 6 installs by the through hole 50 that is provided with at outer cylinder body 5, at the inner peripheral surface of outer cylinder body 5 and the insertion affirmation parts 8 of 13 configurations in the accommodation section that is formed by outer cylinder body 5 and inner barrel 4 constitute.Insert confirming mechanism 6 through this connecting tube and hold whether the connecting tube 10 that inserts arrives the assigned position in the pipe joint 1, whether the connection of connecting tube 10 is accomplished easily and correctly.

Fig. 2 is illustrated in the stereogram of the insertion affirmation parts 8 of accommodation section 13 configurations.Insert to confirm that parts 8 confirm article body 80 by the insertion of O type ring-type and constitute from the bar-like member 81 of the flexibility of the radial extension of said main body.Under the A-stage of this bar-like member 81 before inserting connecting tube 10, be configured in the mode of giving prominence to the outside the accommodation section 13 of pipe joint 1 (with reference to figure 1 upside) from the through hole 50 of outer cylinder body 5.Therefore; The insertion that links to each other with bar-like member 81 confirm article body 80 be configured in outer cylinder body 5 through hole 50 roughly under; And; Bar-like member 81 can freely change it from the outstanding length of outer cylinder body outer circumferential face through regulating its length, so that the operator can confirm the A-stage before connecting tube inserts easily.

The through hole 50 that is provided with at outer cylinder body 5 gets final product the not special qualification of the position in this hole, size, shape so long as connect the opening of the inner and outer circumferential surfaces of outer cylinder body 5.But the position of through hole 50 will consider that the distance in the deep 14 of position or distance is confirmed in the insertion of the connecting tube 10 in the pipe joint accommodation section 13, the length of the bar-like member 81 that before connecting tube inserts, should give prominence to from through hole 50 in advance etc. decides.

On the other hand, when in the accommodation section 13 that connecting tube 10 is inserted into pipe joint 1, insert confirm parts 8 since occupy the cross section, accommodation section all or part of and with the front end butt of connecting tube 10, be pressed into the deep 14 of pipe joint accommodation section 13 then.At this moment; Because bar-like member 81 confirms that with inserting article body 80 links to each other; So be accompanied by to insert and confirm moving of parts 8;, draw in the slot part (slit) 71 that the inner peripheral surface at outer cylinder body 5 forms by sleeve 7, thereby quilt is accommodated (with reference to figure 1 downside) through through hole 50 from the outside of said outer cylinder body 5.

In addition, insert in the confirming mechanism 6, as long as the length adjustment of bar-like member 81 become the distance between the through hole 50 of front position and outer cylinder body 5 of the connecting tube 10 when accomplishing equal in fact with being connected of connecting tube 10 at the connecting tube that present embodiment 1 uses.Thus; When the connecting tube that inserts 10 arrives its position that connects end fully; Bar-like member 81 all is drawn into the through hole 50 from the outside of outer cylinder body 5, is perhaps drawn in the slot part 71 that the inner peripheral surface of outer cylinder body 5 forms by sleeve 7 through through hole 50, thereby is accommodated (wherein in Fig. 1 and Figure 10; Owing to exaggerated the state of accommodating of bar-like member 81, the length of illustrated bar-like member 81 is shorter than necessary length).Therefore, in the pipe joint 1 of present embodiment 1, insert the length of the bar-like member 81 of confirming mechanism 6 through regulating connecting tube, can freely change connecting tube 10 with respect to the insertion depth of the accommodation section length of pipe joint 1, be the insertion affirmation position of connecting tube 10.

The result is the through hole 50 that the operator utilizes the outer cylinder body 5 that vision or finger etc. just can confirm to become empty, and can be easily and the connecting tube 10 of correct assurance insertion with respect to pipe joint 1 whether arrive assigned position, whether connection is accomplished.

In addition; In present embodiment 1, in order to confirm the insertion state of connecting tube 10 more reliably easily, two bar-like members 81 are symmetrical set with respect to inserting the center of confirming article body 80; Therefore; On the outer cylinder body 5 of pipe joint 1,, be symmetrical set two through holes 50 with respect to the central shaft 51 of outer cylinder body 5 corresponding to the quantity and the position of said bar-like member 81.

Bar-like member 81 be accompanied by insert to confirm parts 8 to the moving of axial inner side, on one side be out of shape on one side with the mode of warpage and accommodated among the slot part on the outer cylinder body inner peripheral surface 71.Therefore, bar-like member 81 and comprise it and confirm that in interior insertion parts 8 are preferred by having ductility and the strong material of stretch-proof stress is made by thermoplastic elastomer in present embodiment 1.Thermoplastic elastomer is generally than synthetic rubber or natural rubber; Stretching, extension to certain loading is little; Therefore, be suitable for as keeping the material of the bar-like member 81 that requirement is out of shape with the warpage mode with when the corresponding length in position is confirmed in the insertion of connecting tube 10.

In addition, for the deformation characteristic of the height that obtains bar-like member 81, also can its cross section be processed that kind such as flat pattern and make its easy warpage through shape is improved.The bar-like member 81 of present embodiment 1 is as shown in Figure 2; Narrow through near the section area stenosis that makes and insert the root of confirming article body 80; Or the local thin wallization etc. that makes as shown in Figure 4; Formation has the approximate hinge structure of the section area littler than other parts, thereby can obtain the high warpage characteristic at the initial stage of drawing in.

And then, because the operator can confirm through finger etc. for the shape of the front end of bar-like member 81 etc. easily, so this shape can form the shape that the shape that makes front end comes to a point or have the shape (with reference to figure 4) that concavo-convex surface etc. can stimulate for finger.In addition, in order to improve visual visibility, also can the front end of bar-like member 81 or bar-like member be coloured to showy colors such as iridescent.

Fig. 3 is the stereogram that is illustrated in the sleeve of installing on the inner peripheral surface of outer cylinder body 57.Sleeve 7 is in its end 70 and has the cylindrical shape in the cross section of O type, on its side face, is formed with two mutual opposed slits 71, and they extend corresponding to the position of the through hole 50 of outer cylinder body 5 vertically.And, in present embodiment 1,, form the slot part 71 that constitutes by slit towards the axial inner side from through hole 50 through inner peripheral surface installing sleeve 7 at outer cylinder body 5.

If; On the inner peripheral surface of outer cylinder body 5, do not form slot part 71; Then can cause following unfavorable condition: be accompanied by the insertion of connecting tube 10 and the bar-like member 81 that is drawn in the accommodation section 13 is sandwiched between the outer circumferential face of the inner peripheral surface of outer cylinder body 5 and connecting tube 10; Hinder the further insertion of connecting tube 10, or drawn broken (drawing I Chi ぎゐ).

In addition; As the space between the outer circumferential face of inner peripheral surface that is arranged on outer cylinder body 5 in order to draw in bar-like member 81 and connecting tube 10; Be not to utilize the clearance portion that produces owing to the diameter difference between the external diameter of the internal diameter of outer cylinder body 5 and connecting tube 10, but form other slot part 71.Its reason is: if utilize clearance portion, then rock (rickety) because of the connecting tube 10 after inserting and the clearance portion between the outer cylinder body 5 produce, just can't firmly fix connecting tube 10.

Therefore, in present embodiment 1, the internal diameter of outer cylinder body 5 is set greater than the external diameter of connecting tube 10, and through installing sleeve 7 therein, thereby forms the inner peripheral surface that has with the internal diameter of the roughly the same size of the external diameter of connecting tube 10.In addition, consider the easy property of installation of sleeve 7, so that its external diameter can form sleeve 7 the cross section part C type shape jaggy of that kind shown in Figure 5 than small deformation.

Use such sleeve 7, can improve the formability and the installation property of inserting inner bodies such as confirming parts 8, outside lock ring 12 of outer cylinder body 5.Especially under the situation of the pipe joint 1 of the type of the outside lock ring of stating after the use 12, be used to limit outside lock ring 12 and also be formed on the inner peripheral surface of outer cylinder body 5 easily, therefore easily to axially movable and fixed wall 72 radial parallel.

Referring again to Fig. 1 understands; In the accommodation section 13 of the pipe joint 1 of present embodiment 1; Dispose the inboard lock ring 11 and the outside lock ring 12 that can move in the axial direction, inboard lock ring 11 and outside lock ring 12 have and when connecting tube inserts, are used to push first claw of its inner and outer circumferential surfaces and when the connecting tube drawing, are used to second claw that card ends connecting tube.But, in present embodiment 1, need not lock ring be installed on the inner peripheral surface both sides of outer circumferential face and outer cylinder body 5 of inner barrel 4, as long as be installed on arbitrary side.But, consider because adhering to, trampling etc. of the falling of pipe joint 1, solvent and might cause the situation of a side lock ring breakage preferably is installed in lock ring on inner barrel 4 and outer cylinder body 5 both sides as present embodiment 1.

In addition; Because the inboard lock ring 11 and the outside lock ring 12 that can move in the axial direction in the inner peripheral surface configuration of the outer circumferential face of the inner barrel 4 of pipe joint 1 and outer cylinder body 5, so form the parallel fixed wall and of directly making progress towards the awl wall of continuous hole enlargement of axial outer side or undergauge.Therefore; An end (fixed end) of inboard lock ring 11 and outside lock ring 12 is because limit in fact to axial moving with the relation of the fixed wall of inner barrel 4 or outer cylinder body 5; And; Another end (free end) of inboard lock ring 11 and outside lock ring 12 is installed between fixed wall and the awl wall, because allow to axial moving with the relation of awl wall.

Fig. 6,7 is illustrated in the stereogram of the inboard lock ring 11 that uses in the pipe joint 1 of present embodiment and at the sectional view of the situation of cutting through the cross section of central shaft.

Constitute by cylinder at the inboard lock ring of the outer circumferential face of inner barrel 4 configuration 11, on its body, cut a plurality of slits 111 from the end of cylinder, to form the free end of overhang (cantilever).In addition, inboard lock ring 11 possesses: when connecting tube inserts through resiliently deformable be used for pushing connecting tube inner peripheral surface the first export-oriented claw 112 and be used to the second export-oriented claw 113 that card ends connecting tube when the connecting tube drawing in said free end configuration.

The pressing function of the first export-oriented claw 112 is to realize through the structure that the structure of the inboard lock ring self of the claw that will support inboard lock ring 11 is made elastically deformable.Promptly; The bellying 110 of inboard lock ring 11 is because its axial sectional shape has the such shape (with reference to figure 1) of looper (measuring worm looper); So can be crooked when being pressed, and under its reaction force acts, the inner peripheral surface appropriateness of the connecting tube 10 that inserts be pushed to radially inner side.In addition, slit 111 is owing to extend with the mode of the body that connects inboard lock ring 11 in the axial direction, so each bellying 110 mutual noninterferences of being cut apart by slit 111, resiliently deformable is easy.

The result is in the pipe joint 1 of present embodiment; After the assigned position of the accommodation section 13 that connecting tube 10 is inserted into pipe joint 1; When the drawing direction moves; Because the first export-oriented claw 112 is limited to the inner peripheral surface of connecting tube 10, so inboard lock ring 11 also moves to the drawing direction with connecting tube 10.And the free end of inboard lock ring 11 gets into to the awl wall zone of inner barrel 4; Through with the awl wall interaction; Inboard lock ring 11 is with the mode hole enlargement of the second export-oriented claw 113 to the inner peripheral surface crimping of connecting tube 10, and connecting tube 10 by the second export-oriented claw 113 reliably and securely card end.

On the other hand, Fig. 8, Fig. 9 are illustrated in the stereogram of the outside lock ring 12 that uses in the pipe joint 1 of present embodiment and at the sectional view of the situation of cutting through the cross section of central shaft.

Outside lock ring 12 in the configuration of the inner peripheral surface of outer cylinder body 5 is made up of cylinder with above-mentioned inboard lock ring 11 equally, on its body, has cut a plurality of slits 121 from the end of cylinder, to form the free end of overhang (cantilever).In addition, outside lock ring 12 possesses: when connecting tube inserts through resiliently deformable be used for pushing connecting tube outer circumferential face first in be used to during to claw 122 and in the connecting tube drawing card end connecting tube said free end configuration second in to claw 123.

Be that the structure that the structure of the outside lock ring self of the claw through lock ring 12 outside will support is made elastically deformable is realized in first to the pressing function of claw 122.Promptly; The narrowing portion (reentrant part) 120 of outside lock ring 12 is because its axial sectional shape has the such shape (with reference to figure 1) of looper (measuring wormlooper); So can be crooked when being pressed, and under its reaction force acts, the outer circumferential face appropriateness of the connecting tube 10 that inserts be pushed to radial outside.In addition, slit 121 is owing to extend with the mode of the body that connects outside lock ring 12 in the axial direction, so each narrowing portion 120 of being cut apart by slit 121 is not interfered, resiliently deformable is easy.

The result is in the pipe joint 1 of present embodiment; After the assigned position of the accommodation section 13 that connecting tube 10 is inserted into pipe joint 1; When the drawing direction moves; Owing to be limited to the outer circumferential face of connecting tube 10 in first to claw 122, so outside lock ring 12 also moves to the drawing direction with connecting tube 10.And the free end of outside lock ring 12 gets into to the awl wall zone of outer cylinder body 5; Through with the awl wall interaction; Outside lock ring 12 with in second to the mode undergauge of claw 123 to the outer circumferential face crimping of connecting tube 10, and connecting tube 10 by in second to claw 123 reliably and securely card end.

As the material of the lock ring that can reach above-mentioned

functions

11,12,, can be shaped by plastic materials or metallic material so long as hard and have appropriate flexible material and get final product is not particularly limited.Especially under situation about being shaped, preferably use engineering plastic materials such as PPSU (PPSU) resin or polyphenylene sulfide (PPS) resin as material by plastic materials.

The pipe joint 1 of present embodiment possesses two seal rings 15,15 ' (with reference to the figure 1) that is used to seal with the gap of connecting tube 10 on the outer circumferential face of inner barrel 4.Seal ring 15,15 ' is through slot part 16,16 ' and be housed in wherein and be fixed is set on the outer circumferential face of inner barrel 4.In addition, the sectional shape of seal ring is not particularly limited, and in present embodiment 1, uses the seal ring 15,15 ' with O type cross section.

Seal ring can be configured on the outer circumferential face of inner barrel 4 or on the inner peripheral surface of outer cylinder body 5, perhaps is configured on their both sides' the side face.But; Under the situation of the pipe joint 1 of present embodiment 1; In order to get rid of the dirt of invading or the influence of dust, even and if former thereby also can keep sealing state, configuration seal ring 15,15 ' on the outer circumferential face of inner barrel 4 when damaged because of certain at outer cylinder body 5 from the outside as far as possible.In addition, such seal ring 15,15 ' configuration when pipe joint 1 connects the such pipe of three layers of pipe of aluminium to pipe joint, are also played the effect of the metalwork corrosion that prevents to expose at its end face.

And then, seal ring 15 as present embodiment 1 through be disposed at outside lock ring 12 second in to the relative position of claw 123, thereby the crimp force to claw 123 obtains more firm sealing effect in second after connecting tube capable of using is installed.In addition, in order to reduce rock (rickety) of connecting tube 10 after the installation, the seal ring of present embodiment 15,15 ' with the mode of inboard lock ring 11 that homonymy is installed between them in its place ahead and rear separate configuration.

[embodiment 2]

Figure 10 possesses the direct insertion connecting tube 1 ' that connecting tube inserts preferred another mode of execution of the present invention of confirming mechanism 6; Represent the state before connecting tube inserts in upper half part; Represent the state after connecting tube inserts in lower half portion, and be illustrated in the sectional view of the situation of cutting through the cross section of its central shaft.Understand with reference to Figure 10; The pipe joint 1 ' of present embodiment 2 has pipe joint 1 identical construction with embodiment 1 except following point; Said difference is: be used to the lock ring 17 that card ends connecting tube 10 and have a plurality of teeth or the pawl that is radial extension, and be the lock ring of cyclic type that is fixed on the inner peripheral surface of outer cylinder body 5.

Therefore, the pipe joint 1 ' of present embodiment 2 comprises that adapter body 3, inner barrel 4, outer cylinder body 5, fixed outside lock ring 17 and connecting tube insert confirming mechanism 6, and any part all has the shape of tubular roughly or ring-type.In addition, in present embodiment 2, adapter body 3 comprises inner barrel 4, and is integrally formed through injection moulding.Adapter body 3 and inner barrel 4 portion within it have the passage opening portion 30 that supplies the mobile usefulness of fluid, and its front end 31 has funnel shaped for the resistance that reduces fluid.And then under the situation aspect the productivity of paying attention to pipe joint 1 ' or the cost etc., same with the situation of embodiment 1 pipe joint 1, adapter body 3, inner barrel 4 and outer cylinder body 5 also can be through integrally formed its all parts such as injection mouldings.

In addition; In the pipe joint 1 ' of present embodiment 2; The connecting tube of connecting tube 10 inserts confirming mechanism 6 by constituting at the through hole 50 of outer cylinder body setting, the sleeve 7 and the insertion affirmation parts 8 of 13 configurations in the accommodation section that is formed by outer cylinder body 5 and inner barrel 4 that are installed on the inner peripheral surface of outer cylinder body 5, and this situation with embodiment 1 pipe joint 1 is identical.Therefore, in the pipe joint 1 ' of present embodiment 2, the function and the formation of each part beyond the fixed outside lock ring 17 are identical with embodiment 1 pipe joint 1, therefore, omit the function of each part, the detailed description of structure at this.

In the pipe joint 1 ' of present embodiment 2; Shown in upper half part of Figure 10; Before in the accommodation section 13 of connecting tube 10 insertion tube joints 1 ', it is outstanding that the insertion of O type ring-type confirms that the bar-like member 81 of parts 8 is configured to from through hole 50 outside to outer cylinder body 5.And the operator confirms the existence of these bar-like members 81 through utilize visual or finger etc. from the outside, thereby can be easily and hold connecting tube 10 reliably and under complete state, be not connected yet with pipe joint 1 '.

On the other hand; When connecting tube 10 is inserted in the deep 14 of accommodation section 13 of pipe joint 1 '; When the connection of connecting tube 10 and fixing the completion; Insert to confirm parts 8 since occupy accommodation section 13 the cross section all or part of and with the front end butt of connecting tube 10, be pressed into the deep 14 of pipe joint accommodation section 13 then.At this moment; Because bar-like member 81 confirms that with insertion article body 80 is connected as a body; So be accompanied by to insert and confirm moving of parts 8; Bar-like member 81, is pressed in the slot part (slit) 71 that the inner peripheral surface of outer cylinder body 5 forms by sleeve 7, thereby is accommodated through through hole 50 from the outside of said outer cylinder body 5.

The result is, the through hole 50 of the outer cylinder body 5 that operator's vision capable of using or finger etc. are confirmed to become empty, can be easily and correctly hold the connecting tube that inserts 10 whether with respect to pipe joint 1 ' arrive regulation the position, connect and whether accomplish.

Claims

1. pipe joint, it possesses adapter body, the outer cylinder body and the inner barrel of the accommodation section of the connecting tube that is formed for packing into, be used to confirm that the connecting tube of the insertion state of said connecting tube inserts confirming mechanism, it is characterized in that,

Said insertion confirming mechanism is by constituting like the bottom:

Through hole, it connects the inner peripheral surface and the outer circumferential face of said outer cylinder body;

Slot part, it is formed on the inner peripheral surface of said outer cylinder body, and extends to the axial inner side from said through hole; And

Parts are confirmed in the insertion of C type ring-type or O type ring-type, and it has the bar-like member of the flexibility that is radial extension, and is configured in movably in the axial direction in the said accommodation section,

Before connecting tube inserts; Said bar-like member is configured to from said through hole to the outside of said outer cylinder body outstanding; When connecting tube inserts; Said bar-like member is pressed into the axial inner side through the front end by said connecting tube with said insertion affirmation parts, thereby is drawn into the mode of to the said slot part that the inner peripheral surface at said outer cylinder body forms, accommodating from the outside of said outer cylinder body.

2. pipe joint as claimed in claim 1 is characterized in that,

Confirm the length of the bar-like member of parts through regulating said insertion, can freely change said connecting tube and confirm the position with respect to the insertion of the accommodation section length of said pipe joint.

3. according to claim 1 or claim 2 pipe joint is characterized in that,

Said slot part is to install to the inner peripheral surface of said outer cylinder body through the sleeve that will have the slit that extends vertically to form.

4. according to claim 1 or claim 2 pipe joint is characterized in that,

The cross section of said bar-like member is flat shape.

5. according to claim 1 or claim 2 pipe joint is characterized in that,

Said insertion confirms that parts are by thermoplastic elastomer or synthetic rubber or natural rubber shaping.

6. according to claim 1 or claim 2 pipe joint is characterized in that,

The outer circumferential face of said inner barrel or the inner peripheral surface of said outer cylinder body possess outer circumferential face or the inner peripheral surface of said outer cylinder body and the seal ring in the gap between the said connecting tube that is used to seal said inner barrel.

7. according to claim 1 or claim 2 pipe joint is characterized in that,

Said pipe joint also comprises said inner barrel and inboard lock ring,

Said inner barrel also has with the fixed wall of radial parallel with towards the awl wall of the continuous hole enlargement of axial outer side at outer circumferential face,

Said inboard lock ring is the cylinder with the free-ended a plurality of slits that are used to form overhang; And have when said connecting tube inserts through the resiliently deformable of said cylinder push said connecting tube inner peripheral surface the first export-oriented claw and be disposed at said free end, card ends said connecting tube when the said connecting tube drawing the second export-oriented claw; And said inboard lock ring is configured between the fixed wall of said inner barrel and awl wall, can move in the axial direction

After said connecting tube is inserted into the assigned position of said accommodation section; When the drawing direction moves; Thereby said inboard lock ring moves to the drawing direction with said connecting tube through the inner peripheral surface that the said first export-oriented claw is limited to said connecting tube; The free end of said inboard lock ring gets into the awl wall zone of said inner barrel, then through and said awl wall between interaction, said inboard lock ring is with the mode hole enlargement of the said second export-oriented claw crimping to the inner peripheral surface of said connecting tube.

8. according to claim 1 or claim 2 pipe joint is characterized in that,

Said pipe joint also comprises said outer cylinder body and outside lock ring,

Said outer cylinder body also has with the fixed wall of radial parallel with towards the awl wall of the continuous undergauge of axial outer side at inner peripheral surface,

Said outside lock ring is the cylinder with the free-ended a plurality of slits that are used to form overhang; And have when said connecting tube inserts the outer circumferential face of pushing said connecting tube through the resiliently deformable of said cylinder first in to claw and be disposed at said free end, during in said connecting tube drawing card end said connecting tube second in to claw; And said outside lock ring is configured between the fixed wall of said outer cylinder body and awl wall, can move in the axial direction

After said connecting tube is inserted into the assigned position of said accommodation section; When the drawing direction moves; Thereby said outside lock ring moves to the drawing direction with said connecting tube through the outer circumferential face that is limited to said connecting tube to claw in said first; The free end of said outside lock ring gets into the awl wall zone of said outer cylinder body, then through and said awl wall between interaction, said outside lock ring is with will said second interior to the mode undergauge of claw crimping to the outer circumferential face of said connecting tube.

9. according to claim 1 or claim 2 pipe joint is characterized in that,

Said pipe joint also comprises said inner barrel, said outer cylinder body, inboard lock ring and outside lock ring,

After said connecting tube is inserted into the assigned position of said accommodation section; When the drawing direction moves; Thereby said inboard lock ring moves to the drawing direction with said connecting tube through the inner peripheral surface that the said first export-oriented claw is limited to said connecting tube; The free end of said inboard lock ring gets into the awl wall zone of said inner barrel; Then through and said awl wall between interaction; Said inboard lock ring is with the mode hole enlargement of the said second export-oriented claw crimping to the inner peripheral surface of said connecting tube, thereby and said outside lock ring move to the drawing direction with said connecting tube through the outer circumferential face that is limited to said connecting tube to claw in said first, the free end of said outside lock ring gets into the awl wall zone of said outer cylinder body; Then through and said awl wall between interaction, said outside lock ring with in said second to the mode undergauge of claw crimping to the outer circumferential face of said connecting tube.

10. a pipe joint is characterized in that,

Its insertion by adapter body, inner barrel, outer cylinder body, lock ring and C type ring-type or O type ring-type confirms that parts constitute,

Said inner barrel extends to axial outer side from said adapter body,

On the inner peripheral surface of said outer cylinder body, have through hole that connects inner and outer circumferential surfaces and the slot part that extends to the axial inner side from said through hole; And said outer cylinder body is configured in the outside of said inner barrel; The accommodation section of connecting tube is formed for packing between said outer cylinder body and said inner barrel

Said lock ring is through preventing coming off of said connecting tube with respect to the inner peripheral surface of the connecting tube that inserts said accommodation section and/or the thrust that outer circumferential face crimping front end comes to a point,

The bar-like member that parts have the flexibility that is radial extension is confirmed in said insertion, and is configured in movably in the axial direction in the said accommodation section,

Before connecting tube inserts; Said bar-like member is configured to from said through hole to the outside of said outer cylinder body outstanding; When connecting tube inserts; Said bar-like member is through confirming that with said insertion parts are pressed into the axial inner side by the front end of said connecting tube; Thereby the mode to accommodate to the said slot part that the inner peripheral surface at said outer cylinder body forms from the outside of said outer cylinder body is drawn into, and confirms the length of the bar-like member of parts through regulating said insertion, can freely change said connecting tube and confirm the position with respect to the insertion of the accommodation section length of said pipe joint.