WO2003071180A1 - Structure de raccordement d'extremite de tube metallique - Google Patents

Structure de raccordement d'extremite de tube metallique Download PDF

Info

Publication number
WO2003071180A1
WO2003071180A1 PCT/JP2003/001570 JP0301570W WO03071180A1 WO 2003071180 A1 WO2003071180 A1 WO 2003071180A1 JP 0301570 W JP0301570 W JP 0301570W WO 03071180 A1 WO03071180 A1 WO 03071180A1
Authority
WO
WIPO (PCT)
Prior art keywords
metal tube
terminal
connection
connection structure
tube
Prior art date
Application number
PCT/JP2003/001570
Other languages
English (en)
Japanese (ja)
Inventor
Shinichi Endou
Satoshi Matsubara
Original Assignee
Sanoh Kogyo Kabushiki Kaisha
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
Application filed by Sanoh Kogyo Kabushiki Kaisha filed Critical Sanoh Kogyo Kabushiki Kaisha
Publication of WO2003071180A1 publication Critical patent/WO2003071180A1/fr

Links

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
    • F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/14—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
    • F16L13/141—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling by crimping or rolling from the outside
    • F16L13/143—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling by crimping or rolling from the outside with a sealing element placed around the male part before crimping or rolling
    • 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
    • F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
    • F16L33/30—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses comprising parts inside the hoses only

Definitions

  • the present invention relates to a connection structure of a metal tube terminal connected to a resin tube.
  • the present invention relates to a metal tube terminal connection structure.
  • piping of hydraulic and pneumatic circuits, fuel supply piping, and cooling piping for automobiles, etc. assemble the main piping into the vehicle as a collective piping, constructing the piping in an orderly manner, and assembling man-hours on the line. Reduction and improvement of workability.
  • durable metal pipes are used for this type of collective piping, and a resin tube (hereinafter referred to as a resin tube) is connected to the end of each metal pipe.
  • FIG. 7 is a diagram illustrating a pipe in which a resin tube is connected to a collective pipe of a metal pipe.
  • the plurality of metal tubes 10 are fixed to a vehicle body or the like through a stay 11 as a bundled collective pipe, and one end of a resin tube 14 is connected to both terminal connection portions 12 of the metal tube 10. Unit is connected.
  • a joint for connecting to another pipe or a receiving part, in this case, a quick connector 15 is attached.
  • FIG. 8 is an enlarged view showing the structure of the terminal connecting portion 12 of the metal tube 10.
  • the terminal connection unit 12 basically employs a connection structure proposed by the present applicant in Japanese Patent Application Laid-Open No. Hei 8-75069.
  • a first spool portion 16 is formed at a position near the distal end of the terminal connection portion 12 of the metal tube 10.
  • a second spool portion 17 is formed at a position separated from the first spool portion 16 by a predetermined distance.
  • Metal tube 10 terminal connection A pilot cap 18 is coaxially attached to the distal end of 12 as a member for guiding the press fit of the resin tube 14.
  • An O-ring 19 is mounted between the pilot cap 18 and the first spool 16.
  • connection structure has the advantage that it can be easily connected without press-fitting just by press-fitting the resin tube, there was a problem that the connection strength was weaker than that of a pipe connector such as a quick connector. .
  • the resin tube disposed at a site where the ambient temperature is high and is constantly exposed to heat is softened by heat, and a reduction in connection strength is inevitable. Disclosure of the invention
  • an object of the present invention is to provide a connection structure for a metal tube terminal that solves the problems of the conventional technology, prevents a decrease in connection strength due to heat, and can significantly improve connection strength. It is in.
  • a connection structure for a metal tube terminal of the present invention is a connection structure for connecting a resin tube to a terminal connection portion of a metal tube.
  • a cylindrical connecting member having a stepped portion having an outer diameter larger than the inner diameter of the resin tube is attached, and the resin tube is press-fitted into the terminal connecting portion of the metal tube.
  • connection member when the connection member is attached to the terminal connection portion of the metal tube and the resin tube is press-fitted, the resin tube is hooked on the step of the connection member, and the connection strength is increased only by adding the connection member. It can be greatly improved.
  • FIG. 1 is a longitudinal sectional view showing a connection structure of a metal tube terminal according to a first embodiment of the present invention.
  • FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
  • FIG. 3 is a longitudinal sectional view showing a connection structure of a metal tube terminal according to a second embodiment of the present invention.
  • FIG. 4 is a longitudinal sectional view showing a connection structure of a metal tube terminal according to a third embodiment of the present invention.
  • FIG. 5 is a cross-sectional view showing a connection structure of a metal tube terminal according to a fourth embodiment of the present invention.
  • FIG. 6 is a longitudinal sectional view showing an example of a method of connecting a metal tube and a resin tube in the fourth embodiment.
  • FIG. 7 is a diagram showing a collective pipe composed of a metal tube and a resin tube according to the related art.
  • FIG. 8 is a longitudinal sectional view showing details of a connection structure between the metal tube and the resin tube in FIG. BEST MODE FOR CARRYING OUT THE INVENTION
  • FIG. 1 shows a connection structure of a metal tube terminal according to a first embodiment of the present invention.
  • reference numeral 10 denotes a metal tube
  • 21 denotes a resin tube, which is a somewhat hard and rigid tube made of nylon or the like.
  • the terminal of the metal tube 10 is a terminal connection part 22 into which the resin tube 21 is press-fitted.
  • a first spool portion 23 is formed at a position near the distal end of the terminal connection portion 22 of the metal tube 10.
  • a second spool portion 24 is formed at a position separated from the first spool portion 23 by a predetermined distance.
  • connection member 26 is arranged between the first spool portion 23 and the second spool portion 24.
  • the connecting member 26 is a cylindrical member made of resin having a C-shaped cross section, and the inner diameter is substantially equal to the outer diameter of the metal tube 10. Therefore, the length is set substantially equal to the interval between the first spool portion 23 and the second spool portion 24. Since the connecting member 26 has a C-shaped cross section, it can be easily attached by pressing the terminal connecting portion 22 from the open side, and also in the axial direction. Is restricted by the first spool portion 23 and the second spool portion 24 so that the position in the axial direction is fixed.
  • the stepped portion 28 has a surface 28a that rises outward in the radial direction and a tapered surface 28b that slopes while gradually reducing the diameter toward the tip.
  • a step is formed between the outer peripheral surface of the step 26 and the stepped part 28 as a whole, so that the stepped part 28 has a multi-stage bamboo-shaped press-fit connection part.
  • a pilot cap 30 is coaxially attached to a distal end portion of the terminal connecting portion 22 of the metal tube 10 as a member for guiding the press fitting of the resin tube 21.
  • the pyro-cap 30 is a semi-circular cone-shaped cap having a tapered surface whose outer diameter gradually increases from the tip thereof. The maximum outer diameter is the outer diameter of the first spool portion 23. It is almost the same.
  • a groove for interposing the O-ring 32 is provided between the end face of the pilot cap 30 and the first spool portion 23. Are formed.
  • the terminal structure of the metal tube according to the present embodiment is configured as described above. Next, the operation and effects thereof will be described.
  • the terminal of the resin tube 21 faces the pilot cap 30 of the metal tube 10, and then the resin tube 21 is press-fitted into the terminal connection portion 22.
  • the tapered surface of the pilot cap 30 serves as a guide, and when it is gradually inserted, as shown in Fig. 1, the end of the resin tube 21 becomes the second spool part. You can press-in until you get over 24.
  • the resin tube 21 When the resin tube 21 has been press-fitted, the resin tube 21 is hooked on the four steps in all of the first spool section 23, the step sections 28, 28, and the second spool section 24. Therefore, the resin tube 21 does not come off in a normal environment and does not come off easily even in an environment where the resin tube 21 is exposed to heat. As shown in FIG. Although the structure itself is the same, the connection strength can be greatly improved only by adding the connection member 26. Second embodiment
  • the second embodiment is an embodiment in which the terminal connecting part 22 of the metal tube 10 shown in the first embodiment is the same element and the shape of the connecting member 34 is different from that of the first embodiment.
  • the same components as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted.
  • the connecting member 34 is shorter than the connecting member 26 in FIG. 1, and terminates at the second step 28.
  • a reinforcing angular step 37 is added to the connecting member 34, and the step 37 is arranged so as to be adjacent to the first spool 23. Has become.
  • the buckling strength of the connection member 34 is increased as compared with the embodiment of FIG. 3A, and the connection strength can be further increased.
  • the connecting member 34 itself is basically the same as that in FIG. 3 (b). However, the connecting member 34 in FIG. 3 (b) is terminated at the second step portion 28, whereas the connecting member 34 in FIG. 3 (c) is terminated at the second step portion 2. It has a portion further extending from 8. In the terminal connection portion 22 of the metal tube 10, only the first spool portion 23 is formed. Instead of providing the second spool part 24, when the metal tube 10 is gripped by the chuck 38 used for automatic press-fitting or manual press-fitting, the end face of the connecting member 34 is held by the chuck 38.
  • the resin tube 21 can be smoothly press-fitted. After the press-fitting, the distal end surface of the connection member 34 comes into contact with the first spool portion 23, so that the connection member 34 can be restricted from moving in the tube removal direction.
  • FIG. 4 is a diagram showing a connection structure of a metal tube terminal according to a third embodiment of the present invention.
  • the third embodiment is different from the first and second embodiments described above in that the terminal connection portion 22 of the metal tube 10 has the first spool portion 23 and the second spool portion 24 both.
  • the outer peripheral surface of the terminal connecting portion 22 of the metal tube 10 has an uneven shape in which the connecting member 40 engages with the connecting member 40. This is a type of embodiment having in common the feature of being fixed to the connection part 22.
  • a concave portion 41 is formed on the outer peripheral surface of the metal tube 10 so as to be able to fit the connecting member 40 completely, over the entire circumferential direction.
  • the connection member 40 has spool portions 42 and 43 at both ends.
  • the inner diameter of the connecting member 40 is substantially equal to the outer diameter of the concave portion 41.
  • the concave portion 44 formed on the outer peripheral surface of the terminal connecting portion 22 of the metal tube 10 has a concave portion smaller than the concave portion 41 of FIG. 4B. It is.
  • a bulging portion 45 is formed on the inner peripheral surface of the connecting member 40 so as to fit the concave portion 44.
  • the outer peripheral surface of the terminal connecting portion 22 of the metal tube 10 is formed with two circumferentially extending grooves 46 at two locations.
  • a convex portion 48 engaging with the groove portion 46 is formed in the circumferential direction.
  • the relationship between the groove and the projection is exactly the same as that of the embodiment in FIG. 4 (c), and the outer peripheral surface of the terminal connection portion 22 of the metal tube 10 is provided.
  • the protrusion 49 is formed in the circumferential direction, and the groove 50 is formed in the inner circumferential surface of the connecting member 40 in the circumferential direction.
  • the concave portions 42, 44, the groove portions 46, and the convex portions 48, 49 are not part of the entire circumference but part of the circumference. Is also good.
  • the operation and effect of the third embodiment as described above are basically the same as those of the first embodiment.
  • a special advantage common to each example of the third embodiment is that the metal tube 10 Unlike the first and second embodiments, the terminal connection part 22 does not need to form the first spool part 23 and the second spool part 24, so the terminal connection part 22 is narrowed down.
  • This method has the advantage that processing costs can be reduced because processing can be easily performed by using such a method.
  • the connecting member 40 is made of a resin material, it is possible to form an integral structure with the terminal connecting portion 22 of the metal tube 10 by applying a direct molding method such as insert molding.
  • FIG. 5 is a cross-sectional view showing a connection structure of a metal tube terminal according to a fourth embodiment of the present invention.
  • the connecting member 2 having a C-shaped cross-sectional shape is used.
  • connection structure of the metal tube terminal according to the fourth embodiment uses connection members 52a and 52b that are divided into two in the axial direction.
  • Other structures may be any of the structures of the first to third embodiments.
  • the resin tube 21 may be press-fitted while keeping the connection member 52 a 52 b attached to the terminal connection part 22 of the metal tube 10 with the chuck 38. Note that chuck 3
  • the metal tube 10 can be fixed to the terminal connection portion 22 with an adhesive or the like.
  • the number of steps of the connecting member is two in the above embodiment, but may be one or three.
  • the present invention by simply adding a connecting member to the terminal connecting portion of a conventional metal pipe, a decrease in the connection strength due to heat is prevented, and the connection strength is significantly improved. Can be done.
  • connection strength can be obtained while having the same shape as the conventional bamboo-shaped connection portion.
  • the connecting member can be positioned between the first spool portion and the second spool portion, and the resin tube is caught by all the steps of the first spool portion, the step portion, and the second spool portion.
  • the connection strength is remarkably improved, and the resin tube can be prevented from coming off even when heated.
  • connection strength can be obtained without forming the first spool section and the second spool section. Since the terminal connection can be easily processed by drawing, etc., the processing cost can be reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Joints That Cut Off Fluids, And Hose Joints (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un structure de raccordement d'extrémité de tube métallique pouvant augmenter de manière remarquable une résistance de raccordement tout en évitant que la résistance de raccordement ne soit diminuée par la chaleur. Dans cette structure, un élément de raccordement cylindrique (26) présentant une partie en gradin dont le diamètre extérieur est supérieur au diamètre intérieur d'un tube de résine (21) formé dans cette partie est fixé à la partie de raccordement d'extrémité (22) d'un tube métallique (10), et le tube de résine (21) est emboîté en force dans la partie de raccordement d'extrémité (22) du tube métallique (10) pour raccorder ces tubes l'un à l'autre.
PCT/JP2003/001570 2002-02-21 2003-02-14 Structure de raccordement d'extremite de tube metallique WO2003071180A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2002-044957 2002-02-21
JP2002044957A JP3970633B2 (ja) 2002-02-21 2002-02-21 金属管端末の接続構造

Publications (1)

Publication Number Publication Date
WO2003071180A1 true WO2003071180A1 (fr) 2003-08-28

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PCT/JP2003/001570 WO2003071180A1 (fr) 2002-02-21 2003-02-14 Structure de raccordement d'extremite de tube metallique

Country Status (2)

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JP (1) JP3970633B2 (fr)
WO (1) WO2003071180A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2880670A1 (fr) * 2005-01-12 2006-07-14 Nobel Plastiques Soc Par Actio Embout de raccordement pour tube annele et tube equipe d'un tel embout

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL177035A (en) * 2006-07-23 2010-11-30 Sagiv Agudah Shitufit Chaklait Be Am Pipe fitting assembly and a method for forming it
JP2009180312A (ja) * 2008-01-31 2009-08-13 Bridgestone Corp ホース口金具用樹脂製ニップル及びホース口金具接続構造
JP5402340B2 (ja) * 2008-08-28 2014-01-29 豊田合成株式会社 配管の接続構造体
JP2010281382A (ja) * 2009-06-04 2010-12-16 Jfe Pipe Fitting Mfg Co Ltd 管継手
FR2980256B1 (fr) * 2011-09-15 2014-07-18 Parker Hannifin Mfg France Sas Embout surmoule de raccordement d'une canalisation a un element d'un circuit de transport de fluide
JP6467133B2 (ja) * 2014-01-27 2019-02-06 株式会社Ｓｕｂａｒｕ 接続管構造
JP7231733B2 (ja) * 2018-11-23 2023-03-01 オエティカ シュヴァイツ アーゲー マルチパートコネクタアセンブリ
KR102552882B1 (ko) * 2018-11-23 2023-07-10 외티커 슈비츠 아게 커넥터

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5228113U (fr) * 1975-08-18 1977-02-26
JPH0875069A (ja) * 1994-08-31 1996-03-19 Sanou Kogyo Kk 管の接続構造
JPH09100965A (ja) * 1995-10-06 1997-04-15 Tokai Rubber Ind Ltd 配管部材及び環状シール部材
JPH09126374A (ja) * 1995-10-30 1997-05-13 Usui Internatl Ind Co Ltd 細径金属管と可撓ホースとの接続構造
JP2002039470A (ja) * 2000-05-17 2002-02-06 Sasaki Giken:Kk 管継手構造およびその構成方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5228113U (fr) * 1975-08-18 1977-02-26
JPH0875069A (ja) * 1994-08-31 1996-03-19 Sanou Kogyo Kk 管の接続構造
JPH09100965A (ja) * 1995-10-06 1997-04-15 Tokai Rubber Ind Ltd 配管部材及び環状シール部材
JPH09126374A (ja) * 1995-10-30 1997-05-13 Usui Internatl Ind Co Ltd 細径金属管と可撓ホースとの接続構造
JP2002039470A (ja) * 2000-05-17 2002-02-06 Sasaki Giken:Kk 管継手構造およびその構成方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2880670A1 (fr) * 2005-01-12 2006-07-14 Nobel Plastiques Soc Par Actio Embout de raccordement pour tube annele et tube equipe d'un tel embout
EP1681505A1 (fr) * 2005-01-12 2006-07-19 Nobel Plastiques Embout de raccordement pour tube annélé et tube équipé d'un tel embout
US7322617B2 (en) 2005-01-12 2008-01-29 Nobel Plastiques, S.A. Coupling endpiece for a corrugated tube, and a tube fitted with such an endpiece

Also Published As

Publication number Publication date
JP2003247684A (ja) 2003-09-05
JP3970633B2 (ja) 2007-09-05

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