WO2005024284A1 - Raccord de tube - Google Patents

Raccord de tube Download PDF

Info

Publication number
WO2005024284A1
WO2005024284A1 PCT/KR2004/002216 KR2004002216W WO2005024284A1 WO 2005024284 A1 WO2005024284 A1 WO 2005024284A1 KR 2004002216 W KR2004002216 W KR 2004002216W WO 2005024284 A1 WO2005024284 A1 WO 2005024284A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
control collet
flanges
tube control
coupling body
Prior art date
Application number
PCT/KR2004/002216
Other languages
English (en)
Inventor
Kyung-Sang Lim
Original Assignee
Sang-A Pneumatic Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR10-2003-0061780A external-priority patent/KR100519841B1/ko
Priority claimed from KR10-2003-0061781A external-priority patent/KR100524175B1/ko
Application filed by Sang-A Pneumatic Co., Ltd. filed Critical Sang-A Pneumatic Co., Ltd.
Publication of WO2005024284A1 publication Critical patent/WO2005024284A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L37/00—Couplings of the quick-acting type
    • F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
    • F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
    • F16L37/098—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of flexible hooks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L37/00—Couplings of the quick-acting type
    • F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
    • F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
    • F16L37/092—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of elements wedged between the pipe and the frusto-conical surface of the body of the connector
    • F16L37/0925—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of elements wedged between the pipe and the frusto-conical surface of the body of the connector with rings which bite into the wall of the pipe
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L37/00—Couplings of the quick-acting type
    • F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
    • F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
    • F16L37/092—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of elements wedged between the pipe and the frusto-conical surface of the body of the connector
    • F16L37/0927—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of elements wedged between the pipe and the frusto-conical surface of the body of the connector the wedge element being axially displaceable for releasing the coupling

Definitions

  • the present invention relates to a tube coupling having a coupling body coupled with a control collet, and more particularly to a tube coupling in which a tube is stably fixed to a tube control collet and its assembly is simple .
  • the related art tube coupling includes a coupling body 1, an O-ring 2 inserted into the coupling body 1, and a tube control collet 4 controlling a tube 3 to be coupled with or extracted from the coupling body 1.
  • the tube control collet 4 includes an annular sleeve 42 having a grip 41 at the outer side, a plurality of resilient arms 43a, 43b, and 43c extended from one end of the annular sleeve 42, teeth 44a, 44b, and 44c axially projecting toward the annular sleeve at the inner side of each resilient arm, and flanges 45a, 45b and 45c provided at the outer side of each resilient arm.
  • the respective flanges are respectively provided with inclined cam faces 46a, 46b, and 46c in a direction opposite to an insertion direction of the tube 3. Slots 11a and lib are provided in the vicinity of the inlet of the coupling body 1.
  • the flanges 45a, 45b, and 45c are inserted into the slots 11a and lib.
  • the slots 11a and lib have the size that allows the flanges 45a, 45b and 45c to flexibly move at a predetermined distance.
  • the tube coupling is assembled in such a manner that the O-ring 2 and the tube control collet 4 are sequentially inserted into the coupling body 1. Once the tube 3 is inserted into the assembled tube coupling, the resilient arms 43a, 43b, and 43c of the tube control collet 4 are outwardly pushed by the outer surface of the tube and the end of the tube 3 is moved to the position of the O-ring 2.
  • the projecting teeth 44a, 44b, and 44c formed at the resilient arms abut the outer surface of the tube 3 so that the resilient arms are outwardly pushed and radially extended .
  • the second related art tube coupling includes a tube control collet 104.
  • the tube control collet 104 includes a cylindrical portion 142 having a grip 141, a plurality of resilient arms 143a and 143b extended from one end of the cylindrical portion 142, teeth 144a and 144b axially projecting toward the cylindrical portion at the inner side of each resilient arm, and flanges 145a and 145b provided at the outer side of each resilient arm.
  • a tube coupling body 101 has a cylindrical shape and includes an annular spaced portion 121 therein.
  • the annular spaced portion 121 includes an inner edge portion 122 locking O-ring 2 and an outer edge portion 123 locking the flanges 145a and 145b so as not to allow the tube control collet to be extracted.
  • the distance between the edge portions 122 and 123 is set in such a manner that the flanges 145a and 145b can move at a predetermined distance within the coupling body 101 when the resilient arms 143a and 143b are inserted into the coupling body 101.
  • Tapered portions 146a and 146b are formed from the inner edge portion 122 to the outer edge portion 123 at the head portion of the annular spaced portion 121 in a direction opposite to an insertion direction of the tube 3.
  • the tube is forcibly pulled by external force in a state that the tube is inserted into the tube coupling, it is moved together with the tube control collet 104 because the tube 3 is engaged with the teeth 144a and 144b.
  • the tube control collet 104 and the tube are moved until the flanges 145a and 145b are locked in the tapered portions 146a and 146b.
  • the resilient arms 143a and 143b are axially tightened by action of the tapered portions 146a and 146b to pressurize the tube 3.
  • the tube control collet 104 is not outwardly moved any longer even though the external force is applied thereto. Under the circumstances, the tube 3 can forcibly be extracted from the tube coupling in a state that the grip 141 of the tube control collet 104 is tightly pushed to the insertion direction of the tube.
  • the aforementioned related art tube couplings have several problems. The tube control collet is likely to be extracted from the coupling body. Thus, the tube control collet is more likely to be extracted from the coupling body by any external impact given thereto due to its movement or rotation .
  • the tube coupling body cannot be molded by ejection at once.
  • the coupling body is divided into two parts around an abutting portion of the annular spaced portion and the two parts are separately molded by ejection. Then, the two parts should be jointed to each other by welding in the assembly process as shown in FIG. 5. Alternatively, two parts should be jointed to each other by screw as shown in FIG. 6.
  • FIG. 1 is a sectional view illustrating a related art tube coupling
  • FIG. 2 is a sectional view illustrating a tube control collet coupled to a coupling body of FIG. 1
  • FIG. 3 is a sectional view illustrating another related art tube coupling
  • FIG. 2 is a sectional view illustrating a tube control collet coupled to a coupling body of FIG. 3
  • FIG. 5 and FIG. 6 illustrate examples of manufacturing a tube coupling body of FIG. 3;
  • FIG. 1 is a sectional view illustrating a related art tube coupling
  • FIG. 2 is a sectional view illustrating a tube control collet coupled to a coupling body of FIG. 1
  • FIG. 3 is a sectional view illustrating another related art tube coupling
  • FIG. 2 is a sectional view illustrating a tube control collet coupled to a coupling body of FIG. 3
  • FIG. 5 and FIG. 6 illustrate examples of manufacturing a tube coupling body of FIG. 3
  • FIG. 1 is
  • FIG. 7 is an exploded perspective view of a tube coupling according to the first embodiment of the present invention
  • FIG. 8 is a cut-sectional view of FIG. 7
  • FIG. 9 is a plane view illustrating a tube control collet for a tube coupling according to the first embodiment of the present invention
  • FIG. 10 is a plane view illustrating a tube control collet support for a tube coupling according to the first embodiment of the present invention
  • FIGS. 11 to 14 are sectional views illustrating the operation of a tube coupling according to the first embodiment of the present invention
  • FIG. 15 is an elevational view illustrating an example of a structure of a tube control collet support and a tube coupling body formed in a single body in accordance with the first embodiment of the present invention
  • FIG. 15 is an elevational view illustrating an example of a structure of a tube control collet support and a tube coupling body formed in a single body in accordance with the first embodiment of the present invention
  • FIG. 16 is a cut-sectional view of FIG. 10;
  • FIG. 17 is an elevational view illustrating another example of a tube control collet for a tube coupling in accordance with the first embodiment of the present invention;
  • FIG. 18 is an elevational view illustrating another example of a tube control collet support for a tube coupling in accordance with the first embodiment of the present invention;
  • FIG. 19 is an exploded perspective view of a tube coupling according to the second embodiment of the present invention;
  • FIG. 20 is a cut-sectional view of FIG. 19;
  • FIG. 21 is a plane view illustrating a tube control collet for a tube coupling according to the second embodiment of the present invention;
  • FIG. 22 is a plane view illustrating a tube control collet support for a tube coupling according to the second embodiment of the present invention
  • FIG. 23 is a cut-sectional view illustrating the state that a tube control collet for a tube coupling according to the second embodiment of the present invention is fixed a tight cap
  • FIGS. 24 to 26 are sectional views illustrating the operation of a tube coupling according to the second embodiment of the present invention
  • FIG. 27 is an exploded prospective view illustrating another example of a tube coupling according to the second embodiment of the present invention
  • FIG. 28 is a cut-sectional view of FIG. 27
  • FIG. 29 is an exploded prospective view illustrating other example of a tube coupling according to the second embodiment of the present invention
  • FIG. 30 is a cut-sectional view of FIG. 29.
  • the present invention is directed to a tube coupling that substantially obviates one or more of the problems due to limitations and disadvantages of the related art.
  • the tube coupling provides a tube control collet support coupled to a coupling body and a tube control collet having a plurality of resilient arms, inserted into the tube control collet support.
  • the tube guide projections act uniformly resiliency of the resilient arms on the surface of the tube and guide insertion of the tube.
  • the ends of the tube guide projections are positioned more outwardly than those of teeth formed in the resilient arms of the tube control collet around the central axis of the tube coupling in a state that the tube is not inserted into the coupling body.
  • the tube control collet support for the tube coupling may be provided in a single body with the tube coupling body or may separately be provided apart from the tube coupling body.
  • the tube control collet support separately provided apart from the tube coupling body includes a plurality of extending arms extended from one end of a cylindrical portion and slots formed between the respective extending arms, and tube guide projections linearly formed inside the extending arms along the insertion direction of the tube.
  • the slots serve as spaces where the resilient arms of the tube control collet are slidingly moved when the tube control collet is inserted into the tube control collet support.
  • Edges are formed in the slots as the boundary between the slots and the cylindrical portion. The edges serve to clamp the tube control collet so as not to be outwardly extracted and tight the resilient arms toward the central axis of the tube when the flanges of the resilient arms are disposed at the position of the edges.
  • a tube coupling according to the second embodiment of the present invention comprises a tube control collet support tightly fixed to a coupling body by tightening of a tight cap coupled to the couplind body, the tube control collet support including resilient arms of a tube control collet and tube guide projections disposed between the resilient arms.
  • the tube guide projections act uniformly resiliency of the resilient arms on the surface of the tube and guide insertion of the tube.
  • the ends of the tube guide projections are positioned more outwardly than those of teeth formed in the resilient arms of the tube control collet around the central axis of the tube coupling in a state that the tube is not inserted into the coupling body.
  • the tube control collet support separately provided apart from the tube coupling body includes a plurality of extending arms extended from one end of a cylindrical portion and slots formed between the respective extending arms, and tube guide projections linearly formed inside the extending arms along the insertion direction of the tube.
  • the slots serve as spaces where the resilient arms of the tube control collet are slidingly moved when the tube control collet is inserted into the tube control collet support.
  • Edges are formed in the slots as the boundary between the slots and the cylindrical portion. The edges serve to clamp the tube control collet so as not to be outwardly extracted and tight the resilient arms toward the central axis of the tube when the flanges of the resilient arms are disposed at the position of the edges.
  • a clamp for the tight cap and locking projections inserted into the coupling body are formed at the outside of the cylindrical portion of the tube control collet support.
  • the slots into which the locking projections of the control collet support are inserted have the size that allows the locking projections to move at a certain interval.
  • the tube coupling body of the second embodiment includes a thread coupled to the tight cap and tapered portions abutting the flanges formed in the resilient arms of the tube control collet. The tapered portions are provided so that the tube control collet support is tightly coupled to the coupling body and the flanges of the tube control collet are slid and retracted when the tight cap is tightened to the coupling body.
  • an object of the present invention is to provide a tube coupling in which a tube control collet stably works.
  • Another object of the present invention is to provide a tube coupling in which a tube is not extracted after it is inserted into a coupling body and resiliency of resilient arms uniformly acts on the tube.
  • Other object of the present invention is to provide a tube coupling that facilitates assembly of its parts.
  • a tube control collet 204 for a tube coupling according the first embodiment of the present invention is provided with a tube control collet support 250 to be coupled to a tube coupling body 201.
  • the tube control collet support 250 includes extending arms 253a, 253b, 253c and 253d, tube guide projections 251a, 251b, 251c and 251d formed below the extending arms, and slots 252a, 252b, 252c and 252d formed between the respective extending arms.
  • a virtual circle is drawn along the ends of the tube guide projections, it has a diameter greater than an outer diameter of the tube.
  • a tube control collet support 350 for a tube coupling according to the second embodiment of the present invention is tightly fixed to a tube coupling body by tightening of a tight cap 366 coupled to the tube coupling body 301.
  • the tube control collet support 350 separately provided apart from the coupling body 301 includes a plurality of extending arms 353a, 353b, 353c and 353d extended from one end of a cylindrical portion 354, slots 352a, 352b, 352c and 352d formed between the respective extending arms, and tube guide projections 351a, 351b, 351c and 351d linearly formed inside the extending arms in the same direction as the insertion direction of the tube.
  • the slots serve as spaces where resilient arms of the tube control collet are slidingly moved when the tube control collet is inserted into the tube control collet support.
  • Edges 355a, 355b, 355c and 355d formed inside the slots serve to clamp the control collet so as not to be outwardly extracted and tight the flanges 345a, 345b, 345c and 345d toward the central axis of the tube when the flanges 345a, 345b, 345c and 345d of the resilient arms are disposed at the position of the edges.
  • the tube coupling body 301 is provided with a thread 333 jointed to the tight cap 366.
  • a tapered portion 388 abutting the flanges 345a, 345b, 345c, and 345d formed in the resilient arms of the tube control collet is formed in the vicinity of the inlet of the tube coupling body 301.
  • the tapered portion 388 serves to retract the flanges of the tube control collet as the tube control collet support is tightly pushed to the coupling body when the tight cap is tightened in the coupling body.
  • the tight cap 366 serves to simultaneously lock the flanges 345a, 345b, 345c and 345d of the tube control collet in the tapered portion 388 and the edges 355a, 355b, 355c and 355d of the tube control collet support.
  • the tube control collet can stably work in the coupling body and the tube can firmly be locked in the coupling body.
  • resiliency of the resilient arms of the tube control collet can uniformly be provided by means of action of the tube guide projections 351a, 351b, 351c and 351d.
  • the tube coupling having a simple assembly structure can be obtained.
  • the tube guide projections 351a, 351b, 351c and 351d prevent a tube having a size greater than the standard size from being inserted into the coupling body and exactly guide the tube, the resilient arms, the teeth, and O-ring can safely be protected.
  • a tube coupling comprising a tube control collet inserted into a coupling body 201 of a tube, the tube control collet including a plurality of resilient arms 243a, 243b, 243c and 243d extended from one end of a cylindrical portion 242 and flanges 245a, 245b, 245c and 245d provided at the outer side of each resilient arm, movement in an extraction direction of the tube 3 inserted into the tube coupling body being stopped by tightening of the flanges and the resilient arms being pushed to an insertion direction of the tube to control tightening of the flanges, wherein the tube coupling body comprises a tube control collet support 250 guiding movement of the tube control collet, and the tube control collet support includes at least one or more tube guide projections 256a, 256b,
  • the tube guide projection of the tube control collet support is formed inside one selected from a plurality of extending arms 253a, 253b, 253c and 253d extended from a cylindrical portion 254, and the tube control collet 204 is inserted into the cylindrical portion 254 of the tube control collet support to move the flanges of the tube control collet in slots 252a, 252b, 252c and 252d between the respective extending arms.
  • the tube guide projections are provided in the respective extending arms one to one.
  • the flanges 245a, 245b, 245c and 245d of the resilient arms are respectively locked in edges 255a, 255b, 255c and 255d formed at the boundary between the cylindrical portion and the slots to control tightening of the tube, and the flanges abutting the edges are provided with tapered portions 246a, 246b, 246c and 246d formed toward the extraction direction of the tube.
  • the tube control collet support is provided with locking projections 251a and 251b on the outer surface, and the locking projections are inserted into slots 211a and 211b formed in the tube coupling body.
  • the flanges of the resilient arms are provided with teeth 244a, 244b, 244c and 244d on the lower surface, and the ends of the teeth are projected much more than the ends of the tube guide projections in a state that the tube is not inserted into the coupling body.
  • the tube guide projections are linearly formed along the insertion direction of the tube.
  • the resilient arms of the tube control collet are formed to correspond to the extending arms of the tube control collet support one to one. O-ring is inserted between an inner end of the tube control collet support and an inner edge 22 formed in a through hole in the tube coupling body.
  • the tube control collet support 250 guiding movement of the tube control collet 204 is inserted into the tube coupling body 201, and the tube control collet support includes a cylindrical portion 254, a plurality of extending arms 253a, 253b, 253c and 253d extended from one end of the cylindrical portion, and slots 252a, 252b, 252c and 252d between the extending arms 253a, 253b, 253c and 253d, guiding the flanges 245a, 245b, 245c and 245d through the cylindrical portion.
  • a tube coupling comprising a tube control collet 304 inserted into a coupling body 301 of a tube, the tube control collet including a plurality of resilient arms
  • the tube coupling body comprises a tube control collet support 350 guiding movement of the tube control collet, the tube control collet support being fixed to a tight cap 366 coupled with the coupling body, and the flanges 345a, 345b, 345c and 345d of the tube control collet inserted into the tube control collet support are tightened along a tapered portion 388 formed in the coupling body.
  • the tube control collet support includes at least one or more tube guide projections 356a, 356b, 356c and 356d disposed between the resilient arms of the tube control collet.
  • the tube guide projections of the tube control collet support are formed inside one selected from a plurality of extending arms 353a, 353b, 353c and 353d extended from a cylindrical portion 354, and the tube control collet 304 is inserted into the cylindrical portion 354 of the tube control collet support to move the resilient arms of the tube control collet in slots formed between the respective extending arms.
  • Edges 355a, 355b, 355c and 355d are formed at the boundary between the cylindrical portion and the slots of the tube control collet support, and tapered portions 346a, 346b, 346c and 346d are formed in the flanges 345a, 345b, 345c and 345d of the resilient arms of the tube control collet and abut the edges of the tube control collet support when the flanges are tightened along the tapered portion 388 formed in the coupling body.
  • the tapered portions of the flanges of the tube control collet are formed toward the extraction direction of the tube.
  • the tight cap includes an annular projection 367 on the inner surface, and the annular projection is inserted into a clamp 380 for the tight cap, which is formed on the outer surface of the cylindrical portion of the tube control collet support.
  • the tube control collet support is provided with locking projections 351a and 351b on the outer surface, and the locking projections are inserted into slots 311a and 311b formed in the tube coupling body to flexibly move therein .
  • the tube coupling according to the first embodiment of the present invention includes a tube coupling body 201, O-ring 2, a tube control collet 204, and a tube control collet support 250.
  • the tube coupling body 201 includes a through hole having an inner edge 222 in which the O-ring is locked. Slots 211a and 211b are formed at a predetermined position between the inlet of the through hole and the edge 222. Locking projections 251a and 251b of the tube control collet support are respectively inserted into the slots 211a and 211b.
  • the tube control collet support 250 includes a cylindrical portion 254 inserted into the inlet portion of the coupling body, a plurality of extending arms 253a, 253b, 253c and 253d extended from one end of the cylindrical portion, and slots 252a, 252b, 252c and 252d between the extending arms 253a, 253b, 253c and 253d.
  • Linear tube guide projections 256a, 256b, 256c and 256d projecting in the same direction as that of the extending arms are provided in the inner surface of the respective extending arms .
  • the tube guide projections are tapered toward the central axis of the tube coupling to substantially form a triangle shape.
  • the tube control collet 204 includes a cylindrical portion 242 having a grip 241, a plurality of resilient arms 243a, 243b, 243c and 243d extended from the end of the cylindrical portion, flanges 245a, 245b, 245c and 245d formed at the end of each resilient arm, teeth 244a, 244b, 244c and 244d respectively provided below the flanges, and tapered portions 246a, 246b, 246c and 246d formed on the flanges and tapered toward the cylindrical portion from the projecting flanges.
  • a separate flange edge is provided at the rear end of the tapered portions so that the tube control collet cannot be extracted from the tube coupling body.
  • the tube coupling body 201, the tube control collet support 250, and the tube control collet 204 are assembled by being inserted into one another.
  • the assembly process will be described in more detail.
  • the O-ring 2 is inserted into the through hole of the tube coupling body 201 and pushed to be locked in the inner edge 222.
  • the extending arm of the tube control collet support 250 is directed toward the through hole of the tube coupling body in a state that the O-ring is inserted into the through hole, so that it is inserted into the tube coupling body 201.
  • a pair of locking projections 251a and 251b symmetrically formed on the outer surface of the tube control collet support are forcibly inserted into the slots 211a and 211b formed in the tube coupling body.
  • the locking projections 251a and 251b are firmly fixed to the slots 211a and 211b.
  • the respective flanges 245a, 245b, 245c and 245d of the tube control collet are inserted into respective slots 252a, 252b, 252c and 252d formed between the extending arms 253a, 253b, 253c and 253d so that the respective flanges can move at a certain interval .
  • the operation of the aforementioned tube coupling according to the first embodiment of the present invention will be described in more detail with reference to FIG. 11 to FIG. 14.
  • the tube coupling into which no tube is inserted has a sectional structure of FIG. 11.
  • the tube guide projections 256a and 256c of the tube control collet support 250 have a virtually arc-shape around the end with a diameter greater than that of the tube.
  • the resilient arms do not work at the portion of the resilient arms where the teeth 244a and 244c are positioned .
  • the resilient arms are outwardly pushed because the virtually arc-shaped diameter of the teeth is smaller than that of the tube.
  • the end of the tube is inserted into the tube coupling body through the O-ring 2 as shown in FIG. 13.
  • the O-ring 2 tightly abuts the outer surface of the tube 3 so as not to outwardly leak fluid flowing through the tube and the tube coupling body.
  • the tube control collet 204 is drawn out together with the tube 3 by the teeth 244a and 244c.
  • the tapered portions 246a and 246c formed in the resilient arms are locked in the inner edges 255a and 255c of the slots of the tube control collet support 250, the teeth are tightened toward the tube 3 as shown in FIG. 14 by action of the tapered portions.
  • the tube 3 is not extracted from the coupling body. Since the edges of the flanges 245a, 245b, 245c and 245d are sufficiently high, the tube control collet 204 is not extracted from the tube coupling body.
  • the tube 3 can forcibly extracted from the tube coupling body without any difficulty in a state that the tube control collet is tightly pushed to the tube control collet support.
  • the tube guide projections 256a, 256b, 256c and 257d are linearly formed in the tube control support 250 in parallel with the resilient arms.
  • the tube guide projections are extended more inwardly at the front than the teeth when viewed from the insertion direction of the tube. In this case, the inserting tube can exactly be guided to the teeth. Further, the tube guide projections guide the tube to uniformly act resiliency of the resilient arms on the tube even though the tube is curved. Since the tube having a diameter greater than the standard size is first locked in the tube guide projections, the resilient arms, the teeth, and the O-ring can safely be protected.
  • the tube control collet support 250 is separately provided in view of ejection and assembly of the respective elements.
  • the tube coupling body and the tube control collet may be provided in a single body as shown in FIG. 15 and FIG. 16.
  • the tube coupling body formed in a single body with the tube control collet support is molded by ejection using a plastic material, the coupling body is divided into two parts by the structure of ejection molding and then the two parts are molded by ejection.
  • the two parts should be jointed to each other by well-known welding in the assembly process. Alternatively, the two parts should be jointed to each other by screw.
  • FIGS. 17 and 18 illustrate the tube control collet 204 and the tube control collet support may be provided as shown in FIGS. 17 and 18.
  • FIG. 17 illustrates a tube control collet having two resilient arms 243a and 243b.
  • FIG. 18 illustrates a tube control collet support having two extending arms 253a and 253b. It is not necessary that the teeth and the tube guide projections are provided in the resilient arms and the extending arms one to one.
  • the tube coupling according to the second embodiment of the present invention includes a tube coupling body 301, 0-ring 2, a tube control collet 304, a tube control collet support 350, and a tight cap 366.
  • the tube coupling body 301 includes a through hole having an inner edge 322 in which the 0-ring is locked. Slots 311a and 311b are formed at a predetermined position between the inlet of the through hole and the edge 322.
  • Locking projections 351a and 351b of the tube control collet support 350 are respectively inserted into the slots 311a and 311b.
  • a tapered portion 388 tapered in a direction opposite to the inlet of the tube coupling body 301 is annularly provided in the vicinity of the inlet of the tube coupling body 301.
  • a thread 333 is provided on the outer surface of the inlet and is jointed to the tight cap 366 by screw.
  • the tube control collet support 350 includes a cylindrical portion 354 inserted into the tight cap 366, a plurality of extending arms 353a, 353b, 353c and 353d extended from one end of the cylindrical portion, and slots 352a, 352b, 352c and 352d between the respective extending arms 353a, 353b, 353c and 353d.
  • Linear tube guide projections 356a, 356b, 356c and 356d projecting in the same direction as that of the extending arms are provided in the inner surface of the respective extending arms.
  • the tube guide projections are tapered toward the central axis of the tube coupling to substantially form a triangle shape.
  • a clamp 380 for the tight cap is provided on the outer surface of the cylindrical portion 354 of the tube control collet support.
  • the clamp 380 includes an end edge 377, and a plurality of clamp projections 378a and 378b spaced apart from the end edge 377.
  • the clamp projections are provided a tapered portion so as to allow an annular projection 367 of the tight to be easily inserted into the clamp 380 when the cylindrical portion 354 is inserted into the tight cap as shown in FIG. 23.
  • the tube control collet 304 includes a cylindrical portion 342 having a grip 341, a plurality of resilient arms 343a, 343b, 343c and 343d extended from the end of the cylindrical portion, flanges 345a, 345b, 345c and 345d formed at the end of each resilient arm, teeth 344a, 344b, 344c and 344d respectively provided below the flanges, and tapered portions 346a, 346b, 346c and 346d formed on the flanges and tapered toward the cylindrical portion from the projecting flanges.
  • a separate flange edge is provided at the rear end of the tapered portions so that the tube control collet cannot be extracted from the tube coupling body.
  • the tube coupling body 301, the tube control collet support 350, the tight cap 366, and the tube control collet 304 are assembled by being inserted into one another .
  • the assembly process will be described in more detail,
  • the O-ring 2 is inserted into the through hole of the tube coupling body 301 and pushed to be locked in the inner edge 322.
  • the tube control collet support 350 is inserted into the tight cap 366 so that the annular projection 367 is fixed to the clamp 380 formed in the cylindrical portion 354 of the tube control collet.
  • the locking projections 351a and 351b of the tube control collet are inserted into the slots 311a and 311b of the tube coupling body into which the 0- ring is inserted.
  • the slots 311a and 311b have the size that allows the locking projections to flexibly move, thereby moving the tube control collet support 350 at a predetermined distance in a movement direction of the tube.
  • the respective flanges 345a, 345b, 345c and 345d of the tube control collet are respectively inserted into the slots 352a, 352b, 352c and 352d formed between the respective extending arms 353a, 353b, 353c and 353d so that the respective flanges can move at a certain interval
  • the tube coupling into which no tube is inserted has a sectional structure of FIG. 24.
  • the tube guide projections 356a and 356c of the tube control collet support 350 have a virtually arc-shape around the end with a diameter greater than that of the tube.
  • the resilient arms are outwardly pushed because the virtually arc-shaped diameter of the teeth is smaller than that of the tube.
  • the end of the tube is inserted into the tube coupling body through the O-ring 2 as shown in FIG. 25.
  • the O-ring 2 tightly abuts the outer surface of the tube 3 so as not to outwardly leak fluid flowing through the tube and the tube coupling body.
  • the tube control collet support 350 is moved to the tube coupling body together with the tight cap.
  • the tapered portions 346a and 346c formed in the flanges 345a and 345c are locked in the inner edges 355a and 355c of the tube control collet support 350.
  • the tapered portions 346a and 346c are moved together with the tube control collet support 350.
  • the flanges 345a and 345c of the tube control collet are inwardly retracted along the tapered portion 388 formed in the inlet of the tube coupling body, thereby strongly tightening the outer surface of the tube 3.
  • the flanges 345a and 345c of the tube control collet are locked simultaneously in the tapered portion 388 and the edges 355a and 355c of the tube control collet support 350. In this case, the tube control collet 304 cannot be moved.
  • the tube control collet 304 is not extracted from the tube coupling body.
  • the tube control collet support 350 is retracted to release the flanges 345a and 345c of the tube control collet from the tapered portion 388, the tube control collet is tightly pushed to the tube control collet support.
  • the tube 3 can forcibly be extracted from the tube coupling body without any difficulty.
  • the tube guide projections 356a and 356b are linearly formed in the tube control support 350 in parallel with the resilient arms.
  • the tube guide projections are extended more inwardly at the front than the teeth when viewed from the insertion direction of the tube. In this case, the inserting tube can exactly be guided to the teeth . Further, the tube guide projections guide the tube to uniformly act resiliency of the resilient arms on the tube even though the tube is curved. Since the tube having a diameter greater than the standard size is first locked in the tube guide projections, the resilient arms, the teeth, and the O-ring can safely be protected.
  • the tube control collet support 450 shown in FIG. 27 and FIG. 28 has a structure similar to that of FIG. 19 and FIG. 20.
  • the tube control collet support 450 is different from that of FIG. 19 and FIG. 20 in that it has no locking projection coupled to the coupling body. Therefore, no slot into which the locking projection is inserted is required.
  • Other example of the tube control collet support for the tube coupling according to the second embodiment of the present invention can be assembled as shown in FIG. 29 and FIG. 30.
  • the tube control collet support 550 shown in FIG. 39 and FIG. 30 has a structure similar to that of FIG 19 and FIG. 20.
  • the tube control collet support 550 is different from that of FIG. 19 and FIG. 20 in that the ends of extending arms 553a, 553b, 553c, and 553d directly support the O-ring.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)

Abstract

La présente invention concerne un raccord de tube dans lequel un collet de maintien du tube fonctionne de façon stable, des doigts élastiques et un joint torique sont protégés en sécurité, et l'assemblage est simple. Le raccord de tube comprend un collet de maintien du tube (204) pourvu d'un support de collet de maintien du tube (250), qui est inséré dans un corps de raccord de tube (201). Le support de collet de maintien du tube (250) comporte une pluralité de doigts (253a-d), des crêtes de guidage du tube (256a-d) formées en dessous des doigts correspondants, et des créneaux (252a-d) entre les doigts. Le diamètre du cercle s'inscrivant dans les crêtes de guidage est supérieur au diamètre extérieur du tube. Des doigts élastiques (243a-d) du collet de maintien du tube s'insèrent dans autant de créneaux. En outre, des bords rabattus en biseau (245a-d) garnissant les doigts élastiques (243a-d) s'enclenchent dans les fonds (255a-d) des créneaux de façon à interdire le retrait du tube.
PCT/KR2004/002216 2003-09-04 2004-09-02 Raccord de tube WO2005024284A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2003-0061780A KR100519841B1 (ko) 2003-09-04 2003-09-04 튜브 커플링
KR10-2003-0061781 2003-09-04
KR10-2003-0061781A KR100524175B1 (ko) 2003-09-04 2003-09-04 튜브 커플링
KR10-2003-0061780 2003-09-04

Publications (1)

Publication Number Publication Date
WO2005024284A1 true WO2005024284A1 (fr) 2005-03-17

Family

ID=34277800

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2004/002216 WO2005024284A1 (fr) 2003-09-04 2004-09-02 Raccord de tube

Country Status (1)

Country Link
WO (1) WO2005024284A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150102599A1 (en) * 2013-10-11 2015-04-16 John Guest International Limited Connector
EP3236127A1 (fr) * 2016-04-20 2017-10-25 John Guest International Limited Connecteur
GB2570296A (en) * 2018-01-17 2019-07-24 John Guest International Ltd A connector
CN110332061A (zh) * 2019-07-12 2019-10-15 爱回家(广东)科技有限公司 一种节油减排系统
WO2019207320A1 (fr) 2018-04-27 2019-10-31 John Guest International Limited Raccord
JP2019207002A (ja) * 2018-05-29 2019-12-05 有限会社浜インターナショナル 管継手
FR3114370A1 (fr) * 2020-09-22 2022-03-25 Comap Raccord instantané pour tubes
US11592131B2 (en) * 2019-10-17 2023-02-28 Akwel Fluid connecting device, in particular for the ventilation of a transmission casing
US20230200348A1 (en) * 2021-12-28 2023-06-29 PetSmart Home Office, Inc. Connecting rings for small animal habitat parts

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0113527A1 (fr) * 1982-12-13 1984-07-18 John Derek Guest Raccord de tuyaux
US4573716A (en) * 1982-12-13 1986-03-04 Guest John D Tube couplings
JPH08285159A (ja) * 1995-04-13 1996-11-01 Smc Corp 管継手
EP0829671A2 (fr) * 1996-09-11 1998-03-18 John Derek Guest Douille de serrage pour un dispositif de couplage
JPH1151274A (ja) * 1997-07-30 1999-02-26 Sekisui Chem Co Ltd 管継手およびその組立方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0113527A1 (fr) * 1982-12-13 1984-07-18 John Derek Guest Raccord de tuyaux
US4573716A (en) * 1982-12-13 1986-03-04 Guest John D Tube couplings
JPH08285159A (ja) * 1995-04-13 1996-11-01 Smc Corp 管継手
EP0829671A2 (fr) * 1996-09-11 1998-03-18 John Derek Guest Douille de serrage pour un dispositif de couplage
JPH1151274A (ja) * 1997-07-30 1999-02-26 Sekisui Chem Co Ltd 管継手およびその組立方法

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9322499B2 (en) 2013-10-11 2016-04-26 John Guest International Limited Connector
US9631756B2 (en) 2013-10-11 2017-04-25 John Guest International Limited Connector
US20150102599A1 (en) * 2013-10-11 2015-04-16 John Guest International Limited Connector
EP3236127A1 (fr) * 2016-04-20 2017-10-25 John Guest International Limited Connecteur
GB2570296B (en) * 2018-01-17 2021-02-10 John Guest International Ltd A connector
GB2570296A (en) * 2018-01-17 2019-07-24 John Guest International Ltd A connector
US11761568B2 (en) 2018-01-17 2023-09-19 John Guest International Limited Connector
US11796101B2 (en) 2018-04-27 2023-10-24 John Guest International Limited Connector
WO2019207320A1 (fr) 2018-04-27 2019-10-31 John Guest International Limited Raccord
WO2019230061A1 (fr) * 2018-05-29 2019-12-05 有限会社浜インターナショナル Raccord de tuyau
JP2019207002A (ja) * 2018-05-29 2019-12-05 有限会社浜インターナショナル 管継手
CN110332061A (zh) * 2019-07-12 2019-10-15 爱回家(广东)科技有限公司 一种节油减排系统
US11592131B2 (en) * 2019-10-17 2023-02-28 Akwel Fluid connecting device, in particular for the ventilation of a transmission casing
FR3114370A1 (fr) * 2020-09-22 2022-03-25 Comap Raccord instantané pour tubes
WO2022064143A1 (fr) * 2020-09-22 2022-03-31 Comap Raccord instantané pour tubes
US20230200348A1 (en) * 2021-12-28 2023-06-29 PetSmart Home Office, Inc. Connecting rings for small animal habitat parts

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