JP2010048409A - Flareless pipe coupling structure, valve, flareless pipe fitting, and refrigerating device - Google Patents

Flareless pipe coupling structure, valve, flareless pipe fitting, and refrigerating device Download PDF

Info

Publication number
JP2010048409A
JP2010048409A JP2008241659A JP2008241659A JP2010048409A JP 2010048409 A JP2010048409 A JP 2010048409A JP 2008241659 A JP2008241659 A JP 2008241659A JP 2008241659 A JP2008241659 A JP 2008241659A JP 2010048409 A JP2010048409 A JP 2010048409A
Authority
JP
Japan
Prior art keywords
ferrule
pipe connection
coupling member
connection structure
type pipe
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP2008241659A
Other languages
Japanese (ja)
Inventor
Haruo Nakada
春男 中田
Takashi Shimamura
隆志 嶋村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daikin Industries Ltd
Original Assignee
Daikin Industries 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
Application filed by Daikin Industries Ltd filed Critical Daikin Industries Ltd
Priority to JP2008241659A priority Critical patent/JP2010048409A/en
Priority to PCT/JP2009/063083 priority patent/WO2010010884A1/en
Publication of JP2010048409A publication Critical patent/JP2010048409A/en
Pending legal-status Critical Current

Links

Images

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
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/08—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe
    • F16L19/10—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe the profile of the ring being altered

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joints With Pressure Members (AREA)
  • Valve Housings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flareless pipe coupling structure improved in carry-in cost, management cost and workability of installation work, excelling in workability and preventing a ferrule from coming in partial contact with piping, and a valve, a flareless pipe fitting and a refrigerating device using such a flareless pipe coupling structure. <P>SOLUTION: In the flareless pipe coupling structure, the ferrule 3 is so formed as to be independent of a fitting body and a joint member 2. The fitting body has a female thread tubular section with a female thread section formed in the inner peripheral surface and screwed with the joint member 2, and a cam surface. The joint member 2 has a pipe connection section 23 with a male thread section 23a formed on the outer periphery and screwed with the female thread section. The ferrule 3 is temporarily affixed at its rear end to the fitting body side end of the pipe connection section 23 rotatably and axially movably within a predetermined range, is transportable while being integrated with the joint member 2, and can be assembled in the fitting body. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、食い込み式管接続構造に関し、特に、継手本体と、継手本体に螺合されて組み付けされる結合部材と、継手本体及び結合部材とは別体に形成されるとともに、継手本体と結合部材との間に挟着されるフェルールとを備えた食い込み式管接続構造に関する。また、本発明は、このような食い込み式管接続構造を用いた弁、食い込み式管継手及び冷凍装置に関する。   The present invention relates to a bite type pipe connection structure, and in particular, is formed separately from a joint body, a coupling member that is screwed into the joint body, and the joint body and the coupling member, and is coupled to the joint body. The present invention relates to a bite type pipe connection structure provided with a ferrule sandwiched between members. The present invention also relates to a valve, a bite type pipe joint, and a refrigeration apparatus using such a bite type pipe connection structure.

冷凍装置の冷媒配管、温水装置の給湯配管や給水配管などの配管システムにおいて、接続すべき配管の接続対象である被接続装置に取り付けられる継手本体と、接続すべき配管に外装された状態で継手本体に螺合されて組み付けされる結合部材とを備えた食い込み式管継手が用いられている。このような食い込み式管継手としては、特許文献１に記載のように独立のフェルール（食い込み式スリーブ）を用いるものが多用されていた。しかし、このものは、小さな部品であるフェルールを独立部品としての取り扱わなければならないため、作業性や保管効率が悪い、フェルールを紛失する恐れがある、搬送等の取り扱い時にフェルールが損傷を受ける恐れがあるなどの問題があった。   In piping systems such as refrigerant piping for refrigeration equipment, hot water supply piping and water supply piping for hot water equipment, the joint body attached to the connected device that is the connection target of the piping to be connected, and the joint that is externally attached to the piping to be connected A bite type pipe joint provided with a coupling member that is screwed into the main body and assembled is used. As such a bite type pipe joint, one using an independent ferrule (a bite type sleeve) as described in Patent Document 1 has been widely used. However, the ferrule, which is a small part, must be handled as an independent part, so the workability and storage efficiency are poor, the ferrule may be lost, and the ferrule may be damaged during handling. There were some problems.

このため、フェルールを継手本体又は結合部材に一体的に形成したものが開発されている。このようなものとしては、特許文献２に記載のように、フェルールをナット形状の結合部材の内部に設けたものがある。また、特許文献３に記載のように、継手本体を雌ねじ部が切られたナット形状として内部にカム面を備えるとともに、結合部材を雄ねじ部が切られた部材として、この雄ねじの先端部にフェルールを形成したものがある。   For this reason, a ferrule in which a ferrule is integrally formed on a joint body or a coupling member has been developed. As such a thing, there exists a thing which provided the ferrule in the inside of a nut-shaped coupling member like patent document 2, for example. In addition, as described in Patent Document 3, the joint body has a nut shape with a female threaded portion and a cam surface inside, and the coupling member is a member with a male threaded portion, and a ferrule is attached to the tip of the male screw. There is what formed.

また、特許文献４には、フェルールを仮保持する構造のものが記載されている。この構造を図１９に示す。この構造は、図１９に示すように、継手本体１１０は、結合部材１２０（特許文献４においては締結部材と称されている）側に結合部材１２０を螺合させるための雄ねじ部１１１が形成されるとともに、反結合部材側に正六角形の外形を成す把持部１１２（特許文献４においては治具嵌合部と称されている）が形成されている。そして、軸心部にはカム面１１３（特許文献４においては後部テーパ面と称されている）が形成されている。また、この食い込み式管継手においては、結合部材１２０は、筒状の六角ナット状に形成され、内周面に前記雄ねじ部１１１に螺合する雌ねじ部１２１が形成されている。また、筒状内部の奥部には、フェルール１３０（特許文献４においては締め付けリングと称されている）を係合させて仮止めするための内向き突部１２２が形成され、さらに、フェルール１３０の後端部には、この内向き突部１２２に係合する外向き突部１３１が形成されている。
特開２００３−７４７６８号公報、図５ 特表２００４−５２６９１１号公報 米国特許第４０２２４９７号明細書 特開２００４−３０８６８９号公報 Patent Document 4 describes a structure that temporarily holds a ferrule. This structure is shown in FIG. In this structure, as shown in FIG. 19, the joint main body 110 has a male thread portion 111 for screwing the coupling member 120 on the coupling member 120 (referred to as a fastening member in Patent Document 4). In addition, a grip portion 112 (referred to as a jig fitting portion in Patent Document 4) having a regular hexagonal outer shape is formed on the anti-coupling member side. A cam surface 113 (referred to as a rear tapered surface in Patent Document 4) is formed in the shaft center portion. In this bite-in type pipe joint, the coupling member 120 is formed in a cylindrical hexagonal nut shape, and an internal thread portion 121 that is screwed into the external thread portion 111 is formed on the inner peripheral surface. In addition, an inward projection 122 for engaging and temporarily fixing a ferrule 130 (referred to as a tightening ring in Patent Document 4) is formed in the inner part of the cylindrical shape. An outward projection 131 that engages with the inward projection 122 is formed at the rear end portion.
Japanese Patent Laid-Open No. 2003-74768, FIG. JP-T-2004-526911 US Pat. No. 4,224,497 JP 2004-308689 A

しかしながら、特許文献２及び特許文献３に記載のものでは、フェルールを継手本体又は結合部材に連結する部分の肉厚が薄いために加工速度を上げると加工中にフェルールが切断されるという問題がある他、特許文献３のものでは、筒状部材の奥の方にフェルールを形成するため、加工速度がより一層低下するという問題があった。   However, in the thing of patent document 2 and patent document 3, since the thickness of the part which connects a ferrule to a coupling main body or a coupling member is thin, there exists a problem that a ferrule will be cut | disconnected during a process, if processing speed is raised. In addition, in the thing of patent document 3, since the ferrule was formed in the back of a cylindrical member, there existed a problem that a processing speed fell further.

これに対し、特許文献４のものでは、フェルール１３０が別体に形成されているため、特許文献２及び特許文献３のように加工中にフェルールが意図に反して切断されるという問題がない。しかしながら、フェルールの仮止め部が筒状内部の奥にあるため、ナット仮止め部の内向き突部１２２及びその奥の逃がし穴１２３の加工が困難であると共に、加工する刃物の強度が弱くなり加工スピードが低下するという問題がある。この加工性の問題については、管サイズが小さい管継手において特に問題となる。また、仮止め部が筒状内部にあるため、結合部材１２０の軸方向寸法が仮止め部に必要な寸法分大きくなるという問題がある。また、仮止め部が筒状内部の奥にあるため、仮止め作業を手で行なうことが難しくなるという問題がある。また、特許文献４のように、結合部材１２０に雌ねじ部１２１を形成すると共に、フェルール１３０を筒状内部の奥で固定する場合には、雄ねじ部１１１と雌ねじ部１２１との螺合部と、結合部材１２０におけるフェルール１３０の押圧面１３２との軸方向の距離が大きくなるため、締結時にフェルール１３０が配管１４０に片当りするという問題があった。   On the other hand, in the thing of patent document 4, since the ferrule 130 is formed separately, there is no problem that a ferrule is cut | disconnected unintentionally during a process like patent document 2 and patent document 3. FIG. However, since the ferrule temporary fixing portion is in the inner part of the cylindrical shape, it is difficult to process the inward protruding portion 122 of the nut temporary fixing portion and the relief hole 123 in the inner portion thereof, and the strength of the blade to be processed becomes weak. There is a problem that processing speed decreases. This processability problem is particularly problematic in pipe joints having a small pipe size. In addition, since the temporary fixing portion is in the cylindrical shape, there is a problem that the axial dimension of the coupling member 120 is increased by a size necessary for the temporary fixing portion. In addition, since the temporary fixing portion is in the inner part of the cylindrical shape, there is a problem that it is difficult to perform the temporary fixing operation by hand. In addition, as in Patent Document 4, when the female screw portion 121 is formed in the coupling member 120 and the ferrule 130 is fixed at the inner part of the cylindrical shape, a threaded portion between the male screw portion 111 and the female screw portion 121; Since the axial distance between the connecting member 120 and the pressing surface 132 of the ferrule 130 increases, there is a problem that the ferrule 130 hits the pipe 140 at the time of fastening.

本発明は、従来技術に存在するこのような問題点に着目してなされたものであって、搬入コスト、管理コスト及び組み込み作業性の向上を図ると共に、加工性が良好であって、フェルールが配管に対し片当することがない食い込み式管接続構造を提供することを目的とする。また、本発明は、このような食い込み式管接続構造を用いた弁、食い込み式管継手及び冷凍装置を提供することを目的とする。   The present invention has been made by paying attention to such problems existing in the prior art, and is intended to improve carry-in cost, management cost and assembly workability, has good workability, and has a ferrule. An object of the present invention is to provide a bite type pipe connection structure that does not impinge on the pipe. Another object of the present invention is to provide a valve, a bite type pipe joint and a refrigeration apparatus using such a bite type pipe connection structure.

本発明に係る食い込み式管接続構造は、上記課題を解決するものであって、継手本体と、継手本体に螺合されて組み付けされる結合部材と、継手本体及び結合部材とは別体に形成されるとともに、継手本体と結合部材との間に挟着されるフェルールとを備えた食い込み式管接続構造において、前記継手本体は、結合部材を螺合する雌ねじ部が内周面に形成された雌ねじ筒部と、雌ねじ筒部の側壁をなす基部と、基部の軸心部に形成された接続すべき配管を差し込むための配管差込口と、配管差込口の入口部に形成されたカム面とを有し、前記結合部材は、前記雌ねじ部に螺合される雄ねじ部が外周に形成された管接続部と、この管接続部の継手本体側端部に形成されたフェルールの後端部を押圧する押圧面とを有し、前記フェルールは、その先端部が前記カム面に密接されるテーパ面に形成されるとともに、その後端部が、前記管接続部の前記において結合部材に対し回動可能及び所定範囲内で軸方向に移動可能に仮止めされるとともに、結合部材に仮止めされて一体化されたたまま継手本体に対し組み付け可能に構成されていることを特徴とする。   The bite type pipe connection structure according to the present invention solves the above-described problem, and is formed separately from a joint body, a coupling member screwed into the joint body, and the joint body and the coupling member. In addition, in the bite type pipe connection structure provided with a ferrule sandwiched between the joint body and the coupling member, the joint body has an internal thread portion formed on the inner peripheral surface for screwing the coupling member. A female screw cylinder part, a base part forming the side wall of the female screw cylinder part, a pipe insertion port for inserting a pipe to be connected formed in the axial center part of the base part, and a cam formed at the inlet part of the pipe insertion port And the coupling member includes a pipe connection portion formed on the outer periphery of a male screw portion screwed into the female screw portion, and a rear end of a ferrule formed at a joint main body side end portion of the pipe connection portion. A pressing surface that presses the part, and the ferrule An end portion is formed on a tapered surface that is in close contact with the cam surface, and a rear end portion thereof is temporarily fixed so as to be rotatable with respect to the coupling member at the tube connection portion and movable in the axial direction within a predetermined range. In addition, it is configured to be assembled to the joint body while being temporarily fixed to the coupling member and integrated.

このような構成上の特徴を有する本発明に係る食い込み式管接続構造によれば、フェルールの後端部を結合部材に仮止めする機構が管接続部の継手本体側端部に形成されているので、仮止め部の加工が容易になるととともに、フェルールの仮止め作業も容易になる。また、雄ねじ部と雌ねじ部との螺合部と、結合部材におけるフェルールの押圧面との軸方向の距離が近くなるため、フェルールを押し付けるときにフェルールを片当り状態で押し付けることが回避される。また、仮止め機構が管接続部の継手本体側端面を窪ませて形成されているので、軸方向の寸法が大きくならないという利点もある。   According to the bite type pipe connection structure according to the present invention having such a structural feature, a mechanism for temporarily fixing the rear end portion of the ferrule to the coupling member is formed at the joint main body side end portion of the pipe connection portion. Therefore, the temporary fixing portion can be easily processed, and the ferrule temporary fixing operation can be facilitated. Further, since the axial distance between the threaded portion of the male screw portion and the female screw portion and the pressing surface of the ferrule in the coupling member is close, pressing the ferrule in a one-sided state when pressing the ferrule is avoided. Moreover, since the temporary fixing mechanism is formed by recessing the joint body side end surface of the pipe connecting portion, there is an advantage that the dimension in the axial direction does not increase.

また、前記結合部材は、前記管接続部の前記継手本体側端部に、側面を軸方向に窪ませた凹部を有し、この凹部は、奥部に前記押圧面が形成されるとともに、入口部に径方向内向きの突部が形成され、さらに、この内向きの突部と前記押圧面との間に拡径部が形成され、前記フェルールは、後端部に径方向外向きの突部が形成され、この外向きの突部の外径が前記管接続部の内向きの突部の内径より大きく形成されるとともに、突部の軸方向長さが拡径部の軸方向長さより小さく形成され、さらに、この外向きの突部が前記径方向内向きの突部を介して拡径部内に挿入されて保持されるように構成されているようにしてもよい。このように構成すると、フェルールは、管接続部の継手本体側端部において結合部材に対し回動可能及び所定範囲内で軸方向に移動可能に仮止めされるとともに、結合部材に仮止めされて一体化されたたまま搬送可能、かつ、継手本体に対し組み付け可能に構成される。   In addition, the coupling member has a concave portion whose side surface is recessed in the axial direction at the joint main body side end of the pipe connecting portion, and the concave portion is formed with the pressing surface at the back and an inlet. A radially inward protrusion is formed on the portion, and a diameter-expanded portion is formed between the inward protrusion and the pressing surface, and the ferrule has a radially outward protrusion on the rear end. And the outer diameter of the outward projection is larger than the inner diameter of the inward projection of the pipe connecting portion, and the axial length of the projection is larger than the axial length of the enlarged diameter portion. Further, it may be configured such that the outward projecting portion is inserted and held in the enlarged diameter portion via the radially inward projecting portion. With this configuration, the ferrule is temporarily fixed to the joint member side end of the pipe connecting portion so as to be rotatable with respect to the coupling member and movable in the axial direction within a predetermined range, and is temporarily secured to the coupling member. It can be transported while being integrated, and can be assembled to the joint body.

また、この場合において、前記フェルールの外向きの突部は、その外径が、前記拡径部に挿入される前に前記凹部の内向きの突部の内径より大きく形成されており、前記凹部の内向きの突部内に圧入されて前記拡径部に挿入されているように構成してもよい。このように構成すれば、結合部材の凹部に対しフェルールの後端部を軸方向に押し付けることにより仮止めすることができる。   Further, in this case, the outward protrusion of the ferrule is formed so that the outer diameter thereof is larger than the inner diameter of the inward protrusion of the recess before being inserted into the enlarged diameter portion. You may comprise so that it may be press-fitted in the inward protrusion part, and may be inserted in the said enlarged diameter part. If comprised in this way, it can fix temporarily by pressing the rear-end part of a ferrule to an axial direction with respect to the recessed part of a coupling member.

また、上記のように圧入により挿入されることに代えて、前記フェルールの外向きの突部は、その外径が、前記拡径部に挿入される前には前記凹部の内向きの突部の内径より小さく形成されており、前記拡径部に挿入された後に前記押圧面に圧接されて変形し、前記凹部の内向きの突部の内径より大きく形成されるようにしてもよい。このように構成すれば、前述の場合と同様に、結合部材の凹部に対しフェルールの後端部を軸方向に押し付けることにより仮止めすることができる。また、押付力を大きくすることにより仮止めをより確実に行うことができる。   Further, instead of being inserted by press fitting as described above, the outward protrusion of the ferrule has an inward protrusion of the recess before the outer diameter is inserted into the enlarged diameter portion. It may be formed smaller than the inner diameter of the concave portion, and after being inserted into the enlarged diameter portion, it may be deformed by being pressed against the pressing surface and larger than the inner diameter of the inwardly protruding portion of the concave portion. If comprised in this way, like the above-mentioned case, it can temporarily fix by pressing the rear-end part of a ferrule to an axial direction with respect to the recessed part of a coupling member. Further, the temporary fixing can be more reliably performed by increasing the pressing force.

また、上記のように構成することに代えて、前記凹部の内向きの突部の内周端面には雌ねじが形成され、前記フェルールの外向きの突部の外周端面には、前記結合部材の内向きの突部の内周端面に形成された雌ねじに螺合される雄ねじが形成されているようにしてもよい。このようにすれば、押付力に代えて螺合によりフェルールの突部を前記拡径部に挿入して仮止めすることができる。   In place of the above configuration, an internal thread is formed on the inner peripheral end surface of the inward protruding portion of the recess, and the outer peripheral end surface of the outward protruding portion of the ferrule is formed on the outer peripheral end surface of the coupling member. You may make it form the external thread screwed together by the internal thread formed in the internal peripheral end surface of an inward protrusion. If it does in this way, it replaces with pressing force and can insert the protrusion part of a ferrule in the said enlarged diameter part by screwing, and can be temporarily fixed.

また、前記フェルールは、前記外向きの突部を前記内向きの突部内への圧入を容易にするための強度的に弱い部分が形成されているようにしてもよい。このようにすれば、前記外向きの突部を前記内向きの突部内への圧入する際に、前記強度的に弱い部分の変形によりフェルールの仮止め作業を容易にすることができる。   In addition, the ferrule may be formed with a weakly strong portion for facilitating press-fitting of the outward protrusion into the inward protrusion. In this way, when the outward projecting portion is press-fitted into the inward projecting portion, the temporary fixing operation of the ferrule can be facilitated by deformation of the weakly strong portion.

また、前記フェルールは、前記強度的に弱い部分が形成されることにより、圧入部付近の断面形状が圧入前と圧入時とで異なるように形成してもよい。このように構成する場合は、圧入部を縮径する構造を容易に形成することができる。   Further, the ferrule may be formed so that the cross-sectional shape in the vicinity of the press-fitting portion is different before and during press-fitting by forming the weak portion. In the case of such a configuration, a structure for reducing the diameter of the press-fit portion can be easily formed.

また、前記強度的に弱い部分は、円周方向の複数箇所において前記外向き突部又はその先端側から後端にかけて径方向に窪む窪み部が形成され、この窪み部により径方向の肉厚が薄い薄肉部が後端部に断続的に形成された構成としてもよい。このようにすれば、径方向の肉厚が薄い薄肉部の円周方向の寸法が、前記外向きの突部を前記内向きの突部内への圧入する際には弾性的に縮められ、拡径部に挿入された後には弾性的に元の寸法に戻ることになる。これにより、前記外向きの突部を前記内向きの突部内への圧入作業が容易になる。   Further, the weak portion is formed by forming the outward projecting portion or a recessed portion recessed in the radial direction from the front end side to the rear end at a plurality of locations in the circumferential direction. However, a thin thin portion may be formed intermittently at the rear end. In this way, the circumferential dimension of the thin wall portion having a small radial thickness is elastically shrunk and expanded when the outward projection is press-fitted into the inward projection. After being inserted into the diameter portion, it will elastically return to its original dimensions. This facilitates the press-fitting operation of the outward protrusion into the inward protrusion.

また、前記強度的に弱い部分は、円周方向の複数箇所において前記外向き突部の軸方向前後にかけて径方向の貫通孔が形成され、この貫通孔により軸方向の肉厚が薄い薄肉部が後端部に断続的に形成された構成としてもよい。このようにすれば、軸方向の肉厚が薄い薄肉部の円周方向の寸法が、前記外向きの突部を前記内向きの突部内へ圧入される際に弾性的に縮められ、拡径部に挿入された後には弾性的に元の寸法に戻ることになる。これにより、前記外向きの突部を前記内向きの突部内への圧入作業が容易になる。   Further, in the weak portion, a radial through hole is formed at a plurality of locations in the circumferential direction before and after the outward projecting portion in the axial direction, and a thin wall portion having a thin axial thickness is formed by the through hole. It is good also as a structure formed in the rear-end part intermittently. In this way, the circumferential dimension of the thin wall portion having a thin axial thickness is elastically shrunk when the outward protrusion is press-fitted into the inward protrusion, and the diameter is increased. After being inserted into the part, it will elastically return to its original dimensions. This facilitates the press-fitting operation of the outward protrusion into the inward protrusion.

また、前記強度的に弱い部分は、前記フェルールにおける外向き突部の先端側において外周側及び内周側から、又は外周側又は内周側の何れか一方側から環状の切込みが形成され、この環状の切込みにより径方向の肉厚が薄い環状の薄肉部が前記外向き突部の先端側に形成された構成としてもよい。このようにすれば、前記フェルールにおける外向き突部が、前記内向きの突部内へ圧入される際に軸心方向に撓みやすくなる。これにより、前記外向きの突部を前記内向きの突部内への圧入作業が容易になる。   Further, the weak portion is formed with an annular cut from the outer peripheral side and the inner peripheral side, or from either the outer peripheral side or the inner peripheral side at the distal end side of the outward projection in the ferrule, It is good also as a structure by which the cyclic | annular thin part with a thin radial thickness was formed in the front end side of the said outward protrusion by the cyclic | annular cutting. If it does in this way, when the outward protrusion in the said ferrule is press-fit in the said inward protrusion, it will become easy to bend in an axial direction. This facilitates the press-fitting operation of the outward protrusion into the inward protrusion.

また、前記結合部材は、前記外向きの突部を前記内向きの突部内への圧入を容易にするための切れ目部が、前記内向きの突部における円周方向の数箇所に形成されているようにしてもよい、このようにすれば、前記フェルールは、前記外向きの突部を前記内向きの突部内へ容易に圧入するための強度的に弱い部分が形成されているようにしてもよい。このようにすれば、前記外向きの突部を前記内向きの突部内へ圧入する際に、前記内向きの突部が容易に変形するので、フェルールの仮止め作業が容易になる。   Further, the coupling member has cut portions for facilitating press-fitting of the outward protrusion into the inward protrusion at several locations in the circumferential direction of the inward protrusion. In this way, the ferrule is formed with a weakly strong portion for easily press-fitting the outward protrusion into the inward protrusion. Also good. In this way, when the outward protrusion is press-fitted into the inward protrusion, the inward protrusion is easily deformed, so that the temporary fixing operation of the ferrule is facilitated.

また、本発明に係る弁及び管継手は、上記何れかの管接続構造を管継手部に用いたことを特徴とする。したがって、このような弁、管継手は、フェルールを一体加工したものと同様に配管接続作業を行うことができるので、分離独立型のフェルールの場合のように配管接続作業時にフェルールを紛失する恐れがなく、また、小物部品であるフェルールを組み付ける作業がなくなるので配管接続時の作業性が向上する。   Moreover, the valve and pipe joint according to the present invention are characterized in that any one of the pipe connection structures described above is used for a pipe joint part. Therefore, since such valves and pipe joints can perform pipe connection work in the same way as a ferrule integrated into one piece, there is a risk that the ferrule may be lost during pipe connection work as in the case of a separate and independent type ferrule. In addition, since there is no work for assembling the ferrule which is a small part, workability at the time of pipe connection is improved.

また、本発明に係る冷凍装置は、これら弁或は管継手を冷媒回路に用いたことを特徴とする。したがって、本発明に係る冷凍装置は、上記のような弁、管継手を用いているので、このような弁や管継手に配管を接続する場合にフェルールを紛失する恐れがなく、また作業性が向上する。   The refrigeration apparatus according to the present invention is characterized in that these valves or pipe joints are used in a refrigerant circuit. Therefore, since the refrigeration apparatus according to the present invention uses the valve and pipe joint as described above, there is no risk of losing the ferrule when connecting a pipe to such a valve or pipe joint, and workability is improved. improves.

本発明に係る食い込み式管接続構造によれば、フェルールの後端部仮止めが、管接続部の継手本体側端部において行なわれるので、仮止め部の加工が容易になるととともに、フェルールの仮止め作業も容易になる。また、雄ねじ部と雌ねじ部との螺合部と、結合部材によるフェルールの押圧面と、の軸方向の距離が近くなるため、フェルール押付時に片当りすることを回避することができる。また、仮止め機構が管接続部の継手本体側端面を窪ませて形成されているので、軸方向の寸法が大きくならない。   According to the bite type pipe connection structure according to the present invention, since the rear end portion temporary fixing of the ferrule is performed at the joint body side end portion of the pipe connecting portion, the processing of the temporary fixing portion is facilitated and the ferrule temporary fixing is performed. Stopping work becomes easy. Further, since the axial distance between the threaded portion of the male screw portion and the female screw portion and the pressing surface of the ferrule by the coupling member is close, it is possible to avoid one-side contact when the ferrule is pressed. Moreover, since the temporary fixing mechanism is formed by recessing the joint body side end face of the pipe connecting portion, the dimension in the axial direction does not increase.

以下、本発明の実施の形態に係る食い込み式管接続構造について、図面に基づき説明する。
本実施の形態に係る管接続構造は、空気調和機などの冷凍装置の分野において、冷媒回路中の食い込み式管継手における管継手部に適用される他、分離型空気調和機の室外機における室内外連絡配管を接続する閉鎖弁の管継手部などに適用される。図１は、このような管接続構造を管継手部に採用した食い込み式管継手の部分断面図であって、締結開始時の状態図であり、図２は、同食い込み式管継手においてフェルールを結合部材に仮止めした組付け状態図である。 Hereinafter, a bite type pipe connection structure according to an embodiment of the present invention will be described with reference to the drawings.
The pipe connection structure according to the present embodiment is applied to a pipe joint portion in a bite type pipe joint in a refrigerant circuit in the field of a refrigeration apparatus such as an air conditioner, and also in an outdoor unit of a separate type air conditioner. It is applied to the fittings of shut-off valves that connect external communication pipes. FIG. 1 is a partial cross-sectional view of a bite type pipe joint adopting such a pipe connection structure in a pipe joint part, and is a state diagram at the start of fastening, and FIG. 2 shows a ferrule in the bite type pipe joint. It is the assembly | attachment state figure temporarily fixed to the coupling member.

本実施の形態に係る食い込み式管接続構造は、図１及び図２に示すように、配管を接続しようとする被接続側装置に取り付けられる継手本体１と、継手本体１に螺合されて組み付けされる結合部材２と、継手本体１及び結合部材２とは別体に形成されるとともに、継手本体１と結合部材２との間に挟着されるフェルール３とを備えている。なお、本明細書の説明において前後の方向をいうときは、継手本体１側、例えば、図１における継手本体側、すなわち、図１における左側を前側とし、結合部材２側、すなわち、図１における右側を後側とする。   As shown in FIGS. 1 and 2, the bite type pipe connection structure according to the present embodiment is assembled with a joint main body 1 attached to a connected side device to which a pipe is to be connected and a joint main body 1 screwed together. The coupling member 2 is formed separately from the coupling body 1 and the coupling member 2 and includes a ferrule 3 that is sandwiched between the coupling body 1 and the coupling member 2. In the description of the present specification, when referring to the front-rear direction, the joint body 1 side, for example, the joint body side in FIG. 1, that is, the left side in FIG. 1, is the front side, and the coupling member 2 side, that is, in FIG. The right side is the rear side.

継手本体１は、黄銅製であって、前述の図１、図２、及び継手本体の単体図面である図３に示すように、基部１１の前側にソケット部１２が形成されるとともに、基部１１の外周部の後側に雌ねじ筒部１３が形成され、さらに、基部１１の軸心部の後側に、雌ねじ筒部１３内の空間部に突出する軸部１４が形成されている。雌ねじ筒部１３の内面には、結合部材２の螺合部としての雌ねじ部１３ａが形成されている。軸部１４の外周面には、配管接続時に軸部１４の強度を調節するための環状空間部１５が形成されている。また、この環状空間部１５の基端部には内部凍結防止用の通気孔１５ａが形成されている（図３（ａ）及び（ｂ）参照）。   The joint body 1 is made of brass, and as shown in FIGS. 1 and 2 and FIG. 3 which is a single drawing of the joint body, a socket part 12 is formed on the front side of the base part 11, and the base part 11 is formed. A female threaded cylinder part 13 is formed on the rear side of the outer peripheral part, and a shaft part 14 projecting into a space in the female threaded cylinder part 13 is formed on the rear side of the axial center part of the base part 11. On the inner surface of the female screw cylinder portion 13, a female screw portion 13 a as a screwing portion of the coupling member 2 is formed. An annular space portion 15 is formed on the outer peripheral surface of the shaft portion 14 for adjusting the strength of the shaft portion 14 when piping is connected. Further, a vent hole 15a for preventing internal freezing is formed at the base end portion of the annular space portion 15 (see FIGS. 3A and 3B).

基部１１及び雌ねじ筒部１３の外形は、六角ナット状に一体的に形成されている。基部１１から軸部１４にかけての軸心部には配管Ｐを差し込む配管差込口１６が形成され、基部１１からソケット部１２にかけての軸心部には被接続側装置から導出される配管Ｐａを差し込む配管差込口１７が形成されている。また、配管差込口１６と配管差込口１７との間には、連通孔を形成するとともに配管Ｐ及び配管Ｐａの位置規制を行う段部１８が形成されている。段部１８は、配管差込口１６、１７に差し込まれた配管Ｐ，Ｐａの先端部を段部１８の端面に当接させることにより、配管Ｐ，Ｐａの先端位置を一定に保持する。なお、段部１８の前側の端面は、加工時の刃具の外形形状が残されてテーパ状に形成されている。   The outer shape of the base 11 and the internal thread cylinder 13 is integrally formed in a hexagonal nut shape. A pipe insertion port 16 into which the pipe P is inserted is formed in the shaft center part from the base part 11 to the shaft part 14, and the pipe Pa led out from the connected side device is provided in the shaft center part from the base part 11 to the socket part 12. A pipe insertion port 17 to be inserted is formed. Further, a step portion 18 is formed between the pipe insertion port 16 and the pipe insertion port 17 to form a communication hole and regulate the positions of the pipe P and the pipe Pa. The step portion 18 keeps the tip positions of the pipes P and Pa constant by bringing the tip portions of the pipes P and Pa inserted into the pipe insertion ports 16 and 17 into contact with the end surfaces of the step portion 18. In addition, the front end surface of the stepped portion 18 is formed in a tapered shape, leaving the outer shape of the cutting tool during processing.

軸部１４の先端部、すなわち、配管差込口１６の入口部にはカム面１９が形成されている。カム面１９は、前側において配管差込口１６に連なり、後側（結合部材２側）に向けて径が大きくなる円錐状の面に形成されている。また、カム面１９は、入口側、すなわち、後側（結合部材２側）の円錐部の拡がり角度θ１に対し、前側の配管差込口１６に連なる近辺部１９ａの拡がり角度θ２が大となるように形成されている（図３（ｃ）参照）。   A cam surface 19 is formed at the distal end portion of the shaft portion 14, that is, at the inlet portion of the pipe insertion port 16. The cam surface 19 is connected to the pipe insertion port 16 on the front side, and is formed in a conical surface whose diameter increases toward the rear side (the coupling member 2 side). Further, in the cam surface 19, the expansion angle θ2 of the vicinity 19a connected to the front side pipe insertion port 16 is larger than the expansion angle θ1 of the conical portion on the inlet side, that is, the rear side (coupling member 2 side). (See FIG. 3C).

結合部材２は、黄銅製であって、図１、図２、及び結合部材の単体図面である図４に示すように、軸心に配管Ｐを貫通させる配管貫通孔２１が形成されるとともに、結合部材２を二分するように径方向の切れ目を有する円盤状スリット２２が形成されている。そして、円盤状スリット２２の継手本体側に継手本体１に螺合されるとともに配管接続機構を構成する管接続部２３が形成され、円盤状スリット２２の反継手本体側に一般の締結工具で把持可能とするように形成された把持部２４が形成されている。なお、円盤状スリット２２の軸方向の位置は、継手本体１に対し結合部材２が締結されて配管接続作業が完了した状態において、継手本体１の結合部材側端面の位置と略一致するように配置されている（図６参照）。   The coupling member 2 is made of brass, and as shown in FIGS. 1 and 2 and FIG. 4 which is a single drawing of the coupling member, a pipe through hole 21 through which the pipe P passes through the shaft center is formed. A disc-shaped slit 22 having a radial cut is formed so as to bisect the coupling member 2. And the pipe connection part 23 which comprises a pipe connection mechanism while screwing together with the joint main body 1 at the joint main body side of the disk shaped slit 22 is formed, and is gripped with a general fastening tool on the anti-joint main body side of the disk shaped slit 22. A grip portion 24 is formed so as to be capable of being made. The axial position of the disc-shaped slit 22 is substantially the same as the position of the end face on the coupling member side of the joint body 1 when the coupling member 2 is fastened to the joint body 1 and the pipe connection work is completed. Is arranged (see FIG. 6).

管接続部２３の外周には、継手本体１と螺合する螺合部としての雄ねじ部２３ａが形成されている。また、把持部２４の外形は、締結工具で把持可能とするように六角ナット状に形成されている。そして、円盤状スリット２２と配管貫通孔２１との間に、薄肉の管状部により管接続部２３と把持部２４とを連結する管状連結部２６が形成されている。管状連結部２６は、把持部２４を締め付ける回転トルクが配管接続完了時の値まで大きくなると切断される強度に設計されている。   On the outer periphery of the pipe connecting portion 23, a male screw portion 23a is formed as a screwing portion to be screwed with the joint main body 1. Further, the outer shape of the gripping portion 24 is formed in a hexagonal nut shape so that it can be gripped with a fastening tool. A tubular connecting portion 26 that connects the tube connecting portion 23 and the gripping portion 24 is formed by a thin tubular portion between the disc-shaped slit 22 and the pipe through hole 21. The tubular connecting portion 26 is designed to have such a strength that it can be cut when the rotational torque for tightening the gripping portion 24 increases to the value at the time of completion of the pipe connection.

管接続部２３の継手本体端部には、本発明の骨子を成すフェルール３の後端部を仮止めするための仮止め機構の一部が形成されている。すなわち、管接続部２３の継手本体側端部には凹部２７が形成され、この凹部２７の奥端面がフェルール３を押圧する押圧面２８として形成されている。押圧面２８は、軸心側が後方へ広がる傾斜面に形成されている。そして、この凹部２７の入口には径方向内向きの環状の突部２９が形成されている。この突部２９の端面は、前方に径が大きくなる傾斜面に形成されている（図２及び図４（ｃ）参照）。この傾斜面２９ａは、後述するフェルール３の後端部に形成される環状の突部３５を圧入し易くするためのものである。また、この内向きの突部２９と押圧面２８との間に環状の拡径部２９ｂが形成されている。   A part of a temporary fixing mechanism for temporarily fixing the rear end portion of the ferrule 3 constituting the gist of the present invention is formed at the joint main body end portion of the pipe connecting portion 23. That is, a concave portion 27 is formed at the joint main body side end of the pipe connecting portion 23, and the back end surface of the concave portion 27 is formed as a pressing surface 28 that presses the ferrule 3. The pressing surface 28 is formed in an inclined surface whose axial center side extends rearward. An annular protrusion 29 that is radially inward is formed at the entrance of the recess 27. The end surface of this protrusion 29 is formed in the inclined surface where a diameter becomes large ahead (refer FIG.2 and FIG.4 (c)). This inclined surface 29a is for facilitating press-fitting of an annular protrusion 35 formed at the rear end portion of the ferrule 3 described later. An annular enlarged diameter portion 29 b is formed between the inward projection 29 and the pressing surface 28.

また、管接続部２３の反継手本体側の面には、後述する特別の工具と係合する係合部として、断面が円形で所定深さの４個の係合穴部５１が形成されている。また、把持部２４には、前記係合穴部５１を把持部２４の反継手本体側から加工可能とする加工用穴５２が形成されている。この加工用穴５２は、係合穴部５１と相対向する位置に加工されており、図５に示すように、所定円周上において等間隔に４個形成されている。   In addition, four engagement hole portions 51 having a circular cross section and a predetermined depth are formed on the surface of the pipe connection portion 23 on the side opposite to the joint body as engagement portions that engage with a special tool described later. Yes. The gripping portion 24 is formed with a processing hole 52 that allows the engagement hole portion 51 to be processed from the anti-joint body side of the gripping portion 24. The machining holes 52 are machined at positions opposite to the engagement hole portions 51, and four are formed at equal intervals on a predetermined circumference as shown in FIG.

フェルール３は、黄銅製であって、図１、図２、及びフェルールの単体図面である図５に示すように、継手本体１及び結合部材２とは別体に形成された独立のフェルールである。そして、フェルール３は、配管Ｐを挿通させる挿通孔３１が形成された環状物であって、軸方向に切断した断面で見て、前部３２の外周面が先細のテーパ面３３に形成され、さらに、後部３４の外周面が軸心に略平行な円筒状の平行面に形成されている。   The ferrule 3 is made of brass, and is an independent ferrule formed separately from the joint body 1 and the coupling member 2 as shown in FIGS. 1 and 2 and FIG. 5 which is a single drawing of the ferrule. . The ferrule 3 is an annular object having an insertion hole 31 through which the pipe P is inserted, and the outer peripheral surface of the front portion 32 is formed as a tapered tapered surface 33 when viewed in a cross section cut in the axial direction. Further, the outer peripheral surface of the rear portion 34 is formed as a cylindrical parallel surface substantially parallel to the axis.

前方外周面を成すテーパ面３３は、軸心に対する傾斜角度がカム面１９の後側の円錐部の拡がり角度θ１より小さく形成されている。これにより、フェルール３の前部が曲げられ易くなり、カム面１９とテーパ面３３との接触面積が大きくなるように形成されている。   The tapered surface 33 forming the front outer peripheral surface is formed so that the inclination angle with respect to the axis is smaller than the expansion angle θ1 of the conical portion on the rear side of the cam surface 19. As a result, the front portion of the ferrule 3 is easily bent, and the contact area between the cam surface 19 and the tapered surface 33 is increased.

また、フェルール３の後端部には、フェルール３の仮止め機構の一部として、径方向外向きの環状の突部３５が形成されている。この突部３５の外周端面は、フェルール３の後部３４の突部３５を結合部材２の拡径部２９ｂに圧入しやすくするために、後方に径が小さくなる傾斜面３５ａに形成されている（図２参照）。この突部３５の最大径部の外径は、前述の結合部材２の径方向内向きの環状の突部２９の最小内径より僅かに大きく形成されており、圧入変形により前記内向きの突部２９を介して拡径部２９ｂに押し込められる。また、突部３５の軸方向寸法は、前述の拡径部２９ｂの軸方向寸法より僅かに小さくなるように形成されている。   Further, a radially outward annular protrusion 35 is formed at the rear end of the ferrule 3 as a part of the temporary fixing mechanism of the ferrule 3. The outer peripheral end surface of the protrusion 35 is formed on an inclined surface 35a whose diameter decreases rearward so that the protrusion 35 of the rear portion 34 of the ferrule 3 can be easily pressed into the enlarged diameter portion 29b of the coupling member 2 ( (See FIG. 2). The outer diameter of the maximum diameter portion of the protrusion 35 is formed slightly larger than the minimum inner diameter of the radially inward annular protrusion 29 of the coupling member 2 described above, and the inward protrusion due to press-fitting deformation. 29 and is pushed into the enlarged diameter portion 29b. Further, the axial dimension of the protrusion 35 is formed to be slightly smaller than the axial dimension of the above-described enlarged diameter portion 29b.

フェルール３の仮止め機構は、管接続部２３の継手本体側端面及びフェルール３の後端部において上述のように構成されている。これにより、フェルール３の後端部が結合部材２の継手本体側側面に形成された凹部２７に対し、着脱自在に、かつ、結合部材２に仮止めされて一体化されたまま搬送可能に、かつ、継手本体１に対し組み付け可能に構成されている。   The temporary fixing mechanism of the ferrule 3 is configured as described above at the joint main body side end face of the pipe connecting portion 23 and the rear end portion of the ferrule 3. Thereby, the rear end portion of the ferrule 3 can be detachably attached to the concave portion 27 formed on the side surface of the joint body of the coupling member 2 and can be transported while being temporarily fixed to the coupling member 2 and being integrated. And it is comprised so that attachment with respect to the coupling main body 1 is possible.

フェルール３の後端面は、押圧面２８により押圧される受圧面である。また、フェルール３の後端面は、中心側が前方となる傾斜面３４ａが中心軸側に形成され、中心軸に垂直な垂直面３４ｂが外周側に形成されている。また、傾斜面３４ａと挿通孔３１との交差により形成される角部が後エッジ部を形成している。   The rear end surface of the ferrule 3 is a pressure receiving surface that is pressed by the pressing surface 28. In addition, the rear end surface of the ferrule 3 is formed with an inclined surface 34a whose front side is the center side on the central axis side and a vertical surface 34b perpendicular to the central axis is formed on the outer peripheral side. Further, a corner portion formed by the intersection of the inclined surface 34a and the insertion hole 31 forms a rear edge portion.

また、フェルール３には、挿通孔３１の内周面から外周方向に切り込まれた切込部である第１ノッチ３６、第２ノッチ３７が形成されている。第１ノッチ３６は軸方向の先端部に形成され、第２ノッチ３７は軸方向の後よりに形成されている。第１ノッチ３６は、この第１ノッチ３６の前方にある先端部分の変形を容易にするためのものである。第１ノッチ３６は、軸心方向に切断した断面形状が直角三角形であって、後方の切込端面と挿通孔３１との交差により形成される角部が前エッジ部を形成している。   Further, the ferrule 3 is formed with a first notch 36 and a second notch 37 which are cut portions cut in the outer peripheral direction from the inner peripheral surface of the insertion hole 31. The first notch 36 is formed at the tip end in the axial direction, and the second notch 37 is formed later in the axial direction. The first notch 36 is for facilitating deformation of the tip portion in front of the first notch 36. The first notch 36 has a right-angled triangular cross-section cut in the axial direction, and a corner formed by the intersection of the rear cut end surface and the insertion hole 31 forms a front edge portion.

第２ノッチ３７は、軸方向における第１ノッチ３６と後端面との間における後端面よりの位置に形成されている。この第２ノッチ３７は、外周側に短い辺を備えた略三角形状に形成されている。フェルール３は、図２に示すように、第２ノッチ３７とフェルール３の外周面との間に薄肉部３８が形成されるとともに、後端面に傾斜面３４ａが形成されていることにより、薄肉部３８をヒンジのようにして前後部が軸心側に曲がり易くなっている。この結果、フェルール３の前部３２のテーパ面３３がカム面１９に密着し易くなるとともに、フェルール３の後端に形成される後エッジ部が配管Ｐに食い込み易くなっている。   The second notch 37 is formed at a position from the rear end surface between the first notch 36 and the rear end surface in the axial direction. The second notch 37 is formed in a substantially triangular shape having a short side on the outer peripheral side. As shown in FIG. 2, the ferrule 3 has a thin wall portion 38 formed between the second notch 37 and the outer peripheral surface of the ferrule 3, and an inclined surface 34a is formed on the rear end surface. 38 is like a hinge so that the front and rear portions are easily bent toward the axial center. As a result, the taper surface 33 of the front portion 32 of the ferrule 3 is easily brought into close contact with the cam surface 19, and the rear edge portion formed at the rear end of the ferrule 3 is easy to bite into the pipe P.

以上のように形成されるフェルール３は、部品として搬送及び管理段階において、その後端部が結合部材２に仮止めされて一体化される。この仮止めされた状態図が図２である。このような仮止め状態とするには、フェルール３の中心軸と結合部材２の中心軸とを芯合せした状態として、フェルール３の後端部を結合部材２の凹部２７に押し付ける。これにより、フェルール３の突部３５の外周端面の傾斜面３５ａと結合部材２の内向き突部２９の内周端面の傾斜面２９ａとが当接し、次いで、フェルール３の後端部が圧入変形される。そして、フェルール３の突部３５が僅かに縮径して、拡径部２９ｂ内に挿入される。突部３５は、拡径部２９ｂに挿入された後自由状態に戻るため、外径が結合部材２の内向き突部２９の内径より僅かに大きくなり、フェルール３が仮止めされるとともに搬送作業時においてフェルール３の仮止めされた状態が維持される。しかし、この内向き突部２９と外向き突部３５の引っ掛かりは僅かであるため、取り外すことも可能である。   The ferrule 3 formed as described above is integrated as a component with its rear end part temporarily fixed to the coupling member 2 in the transport and management stage. This temporarily fixed state diagram is shown in FIG. In order to achieve such a temporarily fixed state, the rear end portion of the ferrule 3 is pressed against the concave portion 27 of the coupling member 2 with the central axis of the ferrule 3 and the central axis of the coupling member 2 aligned. Thereby, the inclined surface 35a of the outer peripheral end surface of the protrusion 35 of the ferrule 3 and the inclined surface 29a of the inner peripheral end surface of the inward protruding portion 29 of the coupling member 2 come into contact, and then the rear end portion of the ferrule 3 is press-fitted and deformed. Is done. Then, the protrusion 35 of the ferrule 3 is slightly reduced in diameter and inserted into the enlarged diameter portion 29b. Since the projection 35 returns to the free state after being inserted into the enlarged diameter portion 29b, the outer diameter is slightly larger than the inner diameter of the inward projection 29 of the coupling member 2, and the ferrule 3 is temporarily fixed and the transfer work is performed. At this time, the temporarily fixed state of the ferrule 3 is maintained. However, since the inward projection 29 and the outward projection 35 are slightly caught, they can be removed.

次に、以上のように構成された本結合部材による配管接続方法について説明する。
継手本体１及び結合部材２により配管Ｐを接続するに際しては、まず継手本体１を所定の箇所に取り付ける、この継手本体１が取り付けられる対象としては、配管、閉鎖弁等の各種機器の配管接続ポートである。一方、接続すべき配管Ｐを、フェルール３が仮止めされた状態の結合部材２の配管貫通孔２１及びフェルール３の挿通孔３１に貫挿させて結合部材２を配管Ｐに外装する。この外装作業は、フェルール３が仮止めされた状態の結合部材２を継手本体１から分離した状態として配管Ｐに外装してもよいし、フェルール３が仮止めされた状態の結合部材２を継手本体１に緩く螺合した状態としておいて、結合部材２の後方から配管Ｐを挿入するようにしてもよい。そして、配管Ｐの先端部をフェルール３の挿通孔３１を通して配管差込口１６に挿入し、その先端を段部１８の段差状の端面に当接させた状態として結合部材２を継手本体１に締結する。この螺合により図１に示すようにフェルール３の後端部が押圧面２８に当接した状態となる。 Next, a pipe connection method using the present coupling member configured as described above will be described.
When the pipe P is connected by the joint body 1 and the coupling member 2, the joint body 1 is first attached to a predetermined place. The joint body 1 can be attached to pipe connection ports of various devices such as pipes and shut-off valves. It is. On the other hand, the pipe P to be connected is inserted into the pipe through hole 21 of the coupling member 2 and the insertion hole 31 of the ferrule 3 in a state where the ferrule 3 is temporarily fixed, and the coupling member 2 is externally attached to the pipe P. In this exterior work, the coupling member 2 in a state in which the ferrule 3 is temporarily fixed may be externally mounted on the pipe P as a state separated from the joint body 1, or the coupling member 2 in a state in which the ferrule 3 is temporarily fixed is jointed. The pipe P may be inserted from the rear of the coupling member 2 while being loosely screwed into the main body 1. Then, the distal end portion of the pipe P is inserted into the pipe insertion port 16 through the insertion hole 31 of the ferrule 3, and the coupling member 2 is attached to the joint body 1 in a state where the distal end is brought into contact with the stepped end surface of the step portion 18. Conclude. By this screwing, the rear end portion of the ferrule 3 comes into contact with the pressing surface 28 as shown in FIG.

この状態から引き続き結合部材２を手回しで締め付けると、フェルール３における第１ノッチ３６前方の先端部分が配管Ｐと配管差込口１６との間に楔状に差し込まれ、配管Ｐが仮止めされる。そして、結合部材２がさらに締め付けられると、押圧面２８の軸心側が後方へ拡がる傾斜面に形成されているので、フェルール３の薄肉部３８を中心として前後の部分が軸心側に曲がりやすくなる。したがって、フェルール３は、第２ノッチ３７の前部においては、薄肉部３８を中心にして前エッジ部が配管Ｐに食い込むように傾斜し、第２ノッチ３７の後部においては、薄肉部３８を中心にして後端の後エッジ部が配管Ｐに食い込むように傾斜する（図６参照）。   When the coupling member 2 is continuously tightened from this state by hand, the front end portion of the ferrule 3 in front of the first notch 36 is inserted in a wedge shape between the pipe P and the pipe insertion port 16, and the pipe P is temporarily fixed. When the coupling member 2 is further tightened, the axial center side of the pressing surface 28 is formed as an inclined surface that extends rearward, so that the front and rear portions of the ferrule 3 are easily bent toward the axial center side. . Therefore, the ferrule 3 is inclined so that the front edge portion bites into the pipe P around the thin portion 38 at the front portion of the second notch 37, and the thin portion 38 is centered at the rear portion of the second notch 37. Then, the rear edge of the rear end is inclined so as to bite into the pipe P (see FIG. 6).

このようにして、フェルール３における前エッジ部及び後エッジ部の食い込みが所定量に達すると、図６に示すように、継手本体１の雌ねじ筒部１３の端部と円盤状スリット２２の継手本体側の面とが略一致する。また、このような状態まで結合部材２が締め付けられると、回転トルクが所定値に到達し、管状連結部２６が切断されて継手本体１の雌ねじ筒部１３から突出した状態にある把持部２４が切断される。これにより結合部材２の接続作業が完了する。   Thus, when the biting of the front edge portion and the rear edge portion in the ferrule 3 reaches a predetermined amount, as shown in FIG. 6, the end portion of the female screw cylinder portion 13 of the joint body 1 and the joint body of the disk-shaped slit 22 The side surface is approximately the same. Further, when the coupling member 2 is tightened to such a state, the rotational torque reaches a predetermined value, the tubular connecting portion 26 is cut, and the grip portion 24 in a state of protruding from the female screw cylindrical portion 13 of the joint body 1 is provided. Disconnected. Thereby, the connection work of the coupling member 2 is completed.

次に、上記のような状態で締結された配管接続部は、把持部２４が切断されるためだれでもが簡単に接続部を緩めることができないが、図７に示すような専用の工具を用いることにより、この配管接続部を緩めることができる。   Next, since the pipe connection part fastened in the above state cannot be easily loosened by anyone because the grip part 24 is cut, a dedicated tool as shown in FIG. 7 is used. By this, this pipe connection part can be loosened.

この専用工具６０は、図７に示すように、半円盤状の基体部６１に柄部６２が取り付けられている。基体部６１の半円状穴６３の内周半径は配管Ｐよりやや大径に形成されている。また、係合部として基体部６１の側面に、管接続部２３の４個の係合穴部５１の内の任意の隣り合う３個に係合可能な３個の円柱状の係合突部６４が形成されている。   As shown in FIG. 7, the dedicated tool 60 has a handle 62 attached to a semicircular base 61. The inner peripheral radius of the semicircular hole 63 of the base portion 61 is formed to be slightly larger than the pipe P. Further, three columnar engaging protrusions that can be engaged with any three adjacent four of the four engaging hole portions 51 of the pipe connecting portion 23 on the side surface of the base portion 61 as an engaging portion. 64 is formed.

そして、この専用工具の係合突部６４を管接続部２３の任意の隣り合う３個の係合穴部５１に係合させて、専用工具６０の柄部６２に力を入れて基体部６１を回転させることにより、管接続部２３を回転させて継手本体１との螺合を緩めることができ、配管Ｐを継手本体１から取り外すことができる。この配管接続解除方法によれば、配管Ｐを切断することなく、配管Ｐを取り外すことができるので配管接続解除工事が簡単になる。また、継手本体１を残した状態で配管Ｐを取り外すとともに、結合部材２に仮止めされていたフェルールを引き抜くことにより、この継手本体１に対し新たなフェルール３を用いて配管Ｐを再度接続することができる。   Then, the engagement protrusion 64 of the dedicated tool is engaged with any three adjacent engagement hole portions 51 of the pipe connection portion 23, and a force is applied to the handle 62 of the dedicated tool 60 to thereby form the base portion 61. , The pipe connecting portion 23 can be rotated to loosen the screw connection with the joint body 1, and the pipe P can be removed from the joint body 1. According to this pipe connection releasing method, the pipe P can be removed without cutting the pipe P, so that the pipe connection releasing work is simplified. Further, the pipe P is removed with the joint body 1 left, and the pipe P is reconnected to the joint body 1 using the new ferrule 3 by pulling out the ferrule temporarily fixed to the coupling member 2. be able to.

次に以上のように構成された本実施の形態に係る食い込み式管接続構造によれば次のような効果を奏することができる。
（１）フェルール３の後端部を結合部材２に仮止めする仮止め部が管接続部２３の継手本体１側端部に形成されているので、仮止め部の加工が容易になるととともに、フェルール３の仮止め作業も容易になる。 Next, according to the bite type pipe connection structure according to the present embodiment configured as described above, the following effects can be obtained.
(1) Since the temporary fixing portion for temporarily fixing the rear end portion of the ferrule 3 to the coupling member 2 is formed on the joint main body 1 side end portion of the pipe connecting portion 23, the processing of the temporary fixing portion is facilitated. The temporary fixing work of the ferrule 3 is also facilitated.

（２）また、雄ねじ部２３ａと雌ねじ部１３ａとの螺合部と、結合部材２におけるフェルール３の押圧面２８との軸方向の距離が近くなるため、フェルール３を押し付けるときにフェルール３を配管Ｐに対し片当り状態で押し付けることが回避される。   (2) Since the axial distance between the threaded portion of the male screw portion 23a and the female screw portion 13a and the pressing surface 28 of the ferrule 3 in the coupling member 2 is close, the ferrule 3 is piped when the ferrule 3 is pressed. It is avoided to press against P in a single-contact state.

（３）また、フェルール３の後端部に径方向外向きの突部３５が形成され、この外向きの突部３５の外径が管接続部２３の凹部２７の入口に形成されている内向きの突部２９の内径より僅かに大きく形成されている。また、突部３５の軸方向長さが拡径部２９ｂの軸方向長さより小さく形成され、さらに、この外向きの突部３５が拡径部２９ｂ内に位置するように仮止めされている。したがって、フェルール３は、管接続部２３の継手本体側端部において結合部材２に対し回動可能及び所定範囲内で軸方向に移動可能に仮止めされるとともに、結合部材２に仮止めされて一体化されたまま搬送可能、かつ、継手本体１に対し組み付け可能に構成される。   (3) Further, a radially outward projecting portion 35 is formed at the rear end portion of the ferrule 3, and the outer diameter of the outward projecting portion 35 is formed at the entrance of the recessed portion 27 of the pipe connecting portion 23. It is formed to be slightly larger than the inner diameter of the protruding projection 29. In addition, the axial length of the projection 35 is formed to be smaller than the axial length of the enlarged diameter portion 29b, and the outward projection 35 is temporarily fixed so as to be positioned in the enlarged diameter portion 29b. Accordingly, the ferrule 3 is temporarily fixed to the coupling member 2 at the joint main body side end of the pipe connection portion 23 so as to be rotatable and movable in the axial direction within a predetermined range. It can be conveyed while being integrated, and can be assembled to the joint body 1.

（４）また、このような仮止め状態に組み付けるために、フェルール３の外向きの突部３５が、管接続部２３の凹部２７の入口部に形成されている内向きの突部２９に対し、圧入変形作用により拡径部２９ｂに挿入されるように構成されている。したがって、フェルール３と結合部材２とを芯合せした状態で、フェルール３の後端部を凹部２７に押し込むことにより仮止めすることができる。   (4) Further, in order to assemble in such a temporarily fixed state, the outward projection 35 of the ferrule 3 is in contrast to the inward projection 29 formed at the inlet portion of the recess 27 of the pipe connection portion 23. In addition, it is configured to be inserted into the enlarged diameter portion 29b by the press-fitting deformation action. Therefore, the ferrule 3 and the coupling member 2 can be temporarily fixed by pressing the rear end portion of the ferrule 3 into the recess 27 in a state where the ferrule 3 and the coupling member 2 are aligned.

（５）本実施の形態に係るフェルール３の結合部材２に対する仮止めは、配管Ｐの接続のやり直しなどの場合において、フェルール３を結合部材２から取り外すことができるので、フェルール３を新しいものに交換すれば、継手本体１及び結合部材２を再利用することができる。従来の一体型の場合は、フェルールと結合部材とが一体物として形成されているので、このような場合に、フェルール及び結合部材を新品に取り替える必要があったがこのような無駄を排除することができる。   (5) Temporary fixing of the ferrule 3 according to the present embodiment to the coupling member 2 can be removed from the coupling member 2 in the case of reconnection of the piping P, so that the ferrule 3 is replaced with a new one. If exchanged, the joint body 1 and the coupling member 2 can be reused. In the case of the conventional integrated type, since the ferrule and the coupling member are formed as a single body, in such a case, it was necessary to replace the ferrule and the coupling member with a new one, but to eliminate such waste. Can do.

（６）本実施の形態に係る管接続構造を用いた、弁、管継手は、フェルール３を一体加工したものと同様に配管接続作業を行うことができるので、従来の分離独立型のフェルールを用いた場合のように配管接続作業時にフェルールを紛失する恐れがない。また、小物部品であるフェルールを組み付ける作業がなくなるので配管接続時の作業性が向上する。   (6) Since valves and pipe joints using the pipe connection structure according to the present embodiment can perform pipe connection work in the same manner as the one in which the ferrule 3 is integrally processed, a conventional separate and independent type ferrule is used. There is no risk of losing the ferrule during pipe connection work as it is used. In addition, work for assembling the ferrule, which is a small part, is eliminated, so that workability at the time of pipe connection is improved.

（７）また、このような弁或は管継手を冷媒回路に用いた冷凍装置においても、配管接続時に従来の分離独立型のフェルールを用いた場合のように配管接続作業時にフェルールを紛失する恐れがない。また、小物部品であるフェルールを組み付ける作業がなくなるので配管接続時の作業性が向上する。   (7) Also in a refrigeration apparatus using such a valve or pipe joint in a refrigerant circuit, the ferrule may be lost during pipe connection work, as in the case of using a conventional separate and independent type ferrule at the time of pipe connection. There is no. In addition, work for assembling the ferrule, which is a small part, is eliminated, so that workability at the time of pipe connection is improved.

（実施の形態２）
次に実施の形態２について図８に基づき説明する。
実施の形態２は、実施の形態１においてフェルール３の仮止め機構の構成を変更したものである。図８は実施の形態２における仮止め機構の構成を示したものであって、（ａ）はフェルールの側面図であり、（ｂ）は結合部材の断面図である。なお、この図面において実施の形態１におけると同一の構成要素には、同一の符号を付し、その説明を省略する。 (Embodiment 2)
Next, the second embodiment will be described with reference to FIG.
The second embodiment is obtained by changing the configuration of the temporary fixing mechanism of the ferrule 3 in the first embodiment. FIG. 8 shows the configuration of the temporary fixing mechanism in the second embodiment, where (a) is a side view of the ferrule and (b) is a cross-sectional view of the coupling member. In the drawing, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

実施の形態２における仮止機構は、前述の管接続部２３の継手本体側側面に形成された凹部２７の入口に設けられた内向きの突部２９の端面が、中心軸に略平行に形成されるともに、この内周端面に雌ねじ７１が形成されている。また、フェルール３の後端部に形成される径方向外向きの突部３５の外周端面が、中心軸に略平行に形成されるともに、この外周端面に前述の雌ねじ７１に螺合する雄ねじ７２が形成されている。   In the temporary fixing mechanism according to the second embodiment, the end face of the inward projection 29 provided at the inlet of the recess 27 formed on the side surface of the joint main body of the pipe connecting portion 23 is formed substantially parallel to the central axis. In addition, a female screw 71 is formed on the inner peripheral end face. Further, the outer peripheral end surface of the radially outward projecting portion 35 formed at the rear end portion of the ferrule 3 is formed substantially parallel to the central axis, and the male screw 72 is engaged with the above-described female screw 71 on the outer peripheral end surface. Is formed.

このように構成されていることにより、フェルール３の後端部を結合部材２に仮止めする場合は、フェルール３の後端部の突部３５を管接続部２３の内向き突部２９に螺合される。そして、螺合関係が開放されるまでフェルール３がねじ込まれることにより、突部３５が実施の形態１の場合と同様に拡径部２９ｂに挿入され、実施の形態１の場合と同様な仮止め機能を発揮することができる。   With this configuration, when the rear end of the ferrule 3 is temporarily fixed to the coupling member 2, the protrusion 35 at the rear end of the ferrule 3 is screwed onto the inward protrusion 29 of the pipe connection portion 23. Combined. Then, the ferrule 3 is screwed in until the screwing relationship is released, so that the protrusion 35 is inserted into the enlarged diameter portion 29b as in the case of the first embodiment, and is temporarily fixed as in the case of the first embodiment. Function can be demonstrated.

（実施の形態３）
次に、実施の形態３について、図９に基づき説明する。
実施の形態３は、実施の形態１においてフェルール３の仮止め機構の構成を変更したものである。図９は実施の形態３における仮止め機構の構成を示したものであって、（ａ）はフェルール３後端部の仮止め機構の構成を示す拡大図であって、仮止め機構の形成途中の状態図であり、（ｂ）は仮止め機構完成後の状態図である。なお、この図面において実施の形態１におけると同一の構成要素には、同一の符号を付し、その説明を省略する。 (Embodiment 3)
Next, Embodiment 3 will be described with reference to FIG.
The third embodiment is obtained by changing the configuration of the temporary fixing mechanism of the ferrule 3 in the first embodiment. FIG. 9 shows the configuration of the temporary fixing mechanism according to the third embodiment, and FIG. 9A is an enlarged view showing the configuration of the temporary fixing mechanism at the rear end of the ferrule 3, and is in the process of forming the temporary fixing mechanism. FIG. 6B is a state diagram after completion of the temporary fixing mechanism. In the drawing, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

実施の形態３における仮止め機構は、前述の管接続部２３の継手本体側側面に形成される構成については変更がなく、フェルール３後橋部に形成される径方向外向きの突部３５の構成が変更されている。この実施の形態における突部３５は、図９（ａ）に示すように、フェルール３の部品としての仕上がり状態においては突部３５の外径が径方向内向きの突部２９の内径より小さく形成されている。そして、フェルール３の後端部が管接続部２３の凹部２７内に挿入されて突部３５が押圧面２８に押し付けられることにより、図９（ｂ）に示すように、突部３５が外向きに起き上がるように変形される。そして、突部３５の外径が、管接続部２３の径方向内向きの突部２９の内径より大きくなるように変形されたものである。したがって、このように変形された後は、実施の形態１の場合と同様な仮止め機能を発揮することができる。   The temporary fixing mechanism according to the third embodiment has no change in the configuration formed on the joint body side surface of the pipe connection portion 23 described above, and the radial outward projection 35 formed on the rear bridge portion of the ferrule 3. The configuration has changed. As shown in FIG. 9A, the protrusion 35 in this embodiment is formed so that the outer diameter of the protrusion 35 is smaller than the inner diameter of the radially inward protrusion 29 in a finished state as a part of the ferrule 3. Has been. Then, the rear end portion of the ferrule 3 is inserted into the concave portion 27 of the pipe connecting portion 23, and the protrusion 35 is pressed against the pressing surface 28, so that the protrusion 35 is directed outward as shown in FIG. 9B. It is transformed to get up. The outer diameter of the protrusion 35 is modified so as to be larger than the inner diameter of the protrusion 29 that is radially inward of the pipe connecting portion 23. Therefore, after being deformed in this way, a temporary fixing function similar to that of the first embodiment can be exhibited.

（実施の形態４）
次に、実施の形態４について図１０〜図１２に基づき説明する。
実施の形態４は、実施の形態１における突部３５付近の円周４箇所に、外向きの突部３５を軸方向に横断する強度的に弱い部分を形成して、外向きの突部３５の内向きの突部２９内への圧入を容易にしたものである。なお、図１０は本実施の形態に係るフェルールの単体図面であって、（ａ）はフェルールの後面図であり、（ｂ）は（ａ）におけるＤ−Ｄ断面図である。図１１は、フェルールを結合部材の内向き突部の奥へ圧入するときの、フェルールの後面図である。図１２はフェルールの斜視図である。なお、これら図面において実施の形態１におけると同一の構成要素には、同一の符号を付し、その説明を省略する。 (Embodiment 4)
Next, a fourth embodiment will be described with reference to FIGS.
In the fourth embodiment, weak portions that cross the outward projection 35 in the axial direction are formed at four locations around the projection 35 in the first embodiment, and the outward projection 35 is formed. This facilitates press-fitting into the inward projection 29. FIG. 10 is a single drawing of the ferrule according to the present embodiment, in which (a) is a rear view of the ferrule, and (b) is a DD cross-sectional view in (a). FIG. 11 is a rear view of the ferrule when the ferrule is press-fitted into the inward protrusion of the coupling member. FIG. 12 is a perspective view of the ferrule. In these drawings, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

この実施の形態におけるフェルール３は、図１０及び図１２に示すように、外周面から軸芯に向けて力が作用したときに、円形状の後面が非円形に歪んで外形が小さくなるように円周方向の４箇所に強度的に弱い部分が形成されている。強度的に弱い部分を形成するために、フェルール３の突部３５付近の外周面の４箇所において、外向きの突部３５の先端側（前側）から後端面にかけて突部３５を横切って径方向に窪む断面矩形状の軸方向の溝状の窪み部８１が形成され、この窪み部８１の底辺と挿通孔３１との間に径方向の肉厚が薄い薄肉部８２が形成されている。したがって、この薄肉部８２が、突部３５を軸方向に横切る強度的に弱い部分であるとともに、外向きの突部３５の内向きの突部２９内への圧入を容易にするための強度的に弱い部分となっている。   As shown in FIG. 10 and FIG. 12, the ferrule 3 in this embodiment is such that when a force is applied from the outer peripheral surface toward the shaft core, the circular rear surface is distorted into a non-circular shape and the outer shape is reduced. The weak part is formed in four places of the circumferential direction. In order to form a weak portion, the radial direction across the protrusion 35 from the front end side (front side) to the rear end face of the outward protrusion 35 at four locations on the outer peripheral surface near the protrusion 35 of the ferrule 3 An axial groove-shaped recess 81 having a rectangular cross section is formed, and a thin-walled portion 82 having a small radial thickness is formed between the bottom of the recess 81 and the insertion hole 31. Therefore, the thin-walled portion 82 is a portion that is weak in strength that crosses the protrusion 35 in the axial direction, and is strong for facilitating the press-fitting of the outward protrusion 35 into the inward protrusion 29. It is a weak part.

実施の形態４は、このように構成されているため次のように作用する。外向きの突部３５を内向きの突部２９内へ圧入すると、外向きの突部３５に対して外周側から軸芯に向けて力が作用し、図１１に示すように窪み部８１の溝幅が小さくなるように薄肉部８２が撓む。これにより、圧入前の円形状の外周形状３５１（図１１における２点鎖線）が、圧入時には圧入前の形状とは異なる非円形の外周形状３５２となって外形が小さくなり、外向きの突部３５の内向きの突部２９内への圧入が容易に行われる。なお、外向きの突部３５が圧入されて拡径部２９ｂに挿入された状態においては、外向きの突部３５に対して外周側から力が作用しなくなるため、薄肉部８２が略元の形状に弾性的に復元され、外向きの突部３５が拡径部２９ｂ内に安定的に保持される。   Since the fourth embodiment is configured as described above, it operates as follows. When the outward projecting portion 35 is press-fitted into the inward projecting portion 29, a force acts on the outward projecting portion 35 from the outer peripheral side toward the shaft core, and as shown in FIG. The thin portion 82 bends so that the groove width becomes small. As a result, the circular outer peripheral shape 351 (two-dot chain line in FIG. 11) before press-fitting becomes a non-circular outer peripheral shape 352 different from the shape before press-fitting at the time of press-fitting, and the outer shape becomes smaller, and the outward protrusion The press-fitting of the 35 into the inward projection 29 is easily performed. In the state where the outward projection 35 is press-fitted and inserted into the enlarged diameter portion 29b, the force does not act on the outward projection 35 from the outer peripheral side. The shape is elastically restored to the shape, and the outward projecting portion 35 is stably held in the enlarged diameter portion 29b.

（実施の形態５）
次に、実施の形態５について図１３〜図１５に基づき説明する。
実施の形態５は、実施の形態４の場合と同様に、実施の形態１における突部３５付近の円周４箇所に、外向きの突部３５を軸方向に横断する強度的に弱い部分を形成して、外向きの突部３５の内向きの突部２９内への圧入を容易にしたものである。なお、図１３は本実施の形態に係るフェルールの単体図面であって、（ａ）はフェルールの後面図であり、（ｂ）は（ａ）におけるＥ−Ｅ断面図である。図１４は、フェルールを結合部材の内向き突部の奥へ圧入するときの、フェルールの後面図である。図１５はフェルールの斜視図である。なお、これら図面において実施の形態１におけると同一の構成要素には、同一の符号を付し、その説明を省略する。 (Embodiment 5)
Next, a fifth embodiment will be described with reference to FIGS.
In the fifth embodiment, as in the case of the fourth embodiment, weak portions that cross the outward projecting portion 35 in the axial direction are provided at four locations around the projecting portion 35 in the first embodiment. It is formed to facilitate the press-fitting of the outward projection 35 into the inward projection 29. FIG. 13 is a single drawing of the ferrule according to the present embodiment, in which (a) is a rear view of the ferrule, and (b) is a cross-sectional view taken along line EE in (a). FIG. 14 is a rear view of the ferrule when the ferrule is press-fitted into the inward protrusion of the coupling member. FIG. 15 is a perspective view of the ferrule. In these drawings, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

この実施の形態におけるフェルール３は、図１３及び図１５に示すように、外周面から軸芯に向けて力が作用したときに、円形状の後面が非円形に歪んで外形が小さくなるように円周方向の４箇所に強度的に弱い部分が形成されている。強度的に弱い部分を形成するために、フェルール３の外周面の４箇所において、外向きの突部３５の先端側（前側）から後端面側（後側）にかけて断面矩形状の貫通孔８５が径方向に形成され、この貫通孔８５の後端面とフェルール３の後端面との間に軸方向の肉厚が薄い薄肉部８６が形成されている。したがって、この薄肉部８６が、突部３５を軸方向に横切る強度的に弱い部分であるとともに、外向きの突部３５の内向きの突部２９内への圧入を容易にするための強度的に弱い部分となっている。   As shown in FIGS. 13 and 15, the ferrule 3 in this embodiment is configured such that when a force is applied from the outer peripheral surface toward the axis, the circular rear surface is distorted into a non-circular shape and the outer shape is reduced. The weak part is formed in four places of the circumferential direction. In order to form weak portions in strength, through holes 85 having a rectangular cross section are formed from the front end side (front side) to the rear end surface side (rear side) of the outward projection 35 at four locations on the outer peripheral surface of the ferrule 3. A thin portion 86 having a small axial thickness is formed between the rear end surface of the through hole 85 and the rear end surface of the ferrule 3. Therefore, the thin-walled portion 86 is a portion that is weak in strength that crosses the protrusion 35 in the axial direction, and is strong for facilitating the press-fitting of the outward protrusion 35 into the inward protrusion 29. It is a weak part.

このため、外向きの突部３５を内向きの突部２９内へ圧入すると、外向きの突部３５に対して外周側から軸芯に向けて力が作用する。これにより、図１４に示すように、貫通孔８５の周方向の穴幅が小さくなるように薄肉部８６が撓み、圧入前の円形状の外周形状３５５（図１４における２点鎖線）が非円形の外周形状３５６となって外形が小さくなり、外向きの突部３５の内向きの突部２９内への圧入が容易に行われる。なお、外向きの突部３５が圧入されて拡径部２９ｂに挿入された状態においては、外向きの突部３５に対して外周側から力が作用しなくなるため、薄肉部８６が略元の形状に弾性的に復元され、外向きの突部３５が拡径部２９ｂ内に安定的に保持される。   For this reason, when the outward projection 35 is press-fitted into the inward projection 29, a force acts on the outward projection 35 from the outer peripheral side toward the shaft core. Thereby, as shown in FIG. 14, the thin-walled portion 86 is bent so that the hole width in the circumferential direction of the through hole 85 is reduced, and the circular outer peripheral shape 355 (two-dot chain line in FIG. 14) before press-fitting is non-circular The outer shape of the outer protrusion 356 becomes smaller, and the outward protrusion 35 is easily press-fitted into the inward protrusion 29. In addition, in the state where the outward projecting portion 35 is press-fitted and inserted into the enlarged diameter portion 29b, no force acts on the outward projecting portion 35 from the outer peripheral side. The shape is elastically restored to the shape, and the outward projecting portion 35 is stably held in the enlarged diameter portion 29b.

（実施の形態６）
次に、実施の形態６について図１６に基づき説明する。
実施の形態６は、実施の形態１において、外向きの突部３５が軸心側に撓み易くすることにより、内向きの突部２９に対する外向きの突部３５の圧入を容易にしたものである。なお、図１６は本実施の形態に係るフェルールの仮止め部の拡大図である。なお、この図面において実施の形態１におけると同一の構成要素には、同一の符号を付し、その説明を省略する。 (Embodiment 6)
Next, Embodiment 6 will be described with reference to FIG.
In the sixth embodiment, in the first embodiment, the outward protrusion 35 is easily bent toward the axial center, thereby facilitating the press-fitting of the outward protrusion 35 with respect to the inward protrusion 29. is there. FIG. 16 is an enlarged view of the temporary fixing portion of the ferrule according to the present embodiment. In the drawing, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

この実施の形態におけるフェルール３は、図１６に示すように、外周面から軸芯に向けて力が作用したときに、外向きの突部３５部分が軸心側に撓み易くなるように突部３５の前部に環状の強度的に弱い部分を形成したものである。環状の強度的に弱い部分を形成するために、フェルール３の薄肉部３８の外周面にさらに楔状の切込み９１が環状に形成されている。これにより、第２ノッチ３７と切込み９１との間に環状の薄肉部９２が形成されている。したがって、この環状の薄肉部９２が、外向きの突部３５の内向きの突部２９内への圧入を容易にするための強度的に弱い部分を構成している。   As shown in FIG. 16, the ferrule 3 in this embodiment has a protruding portion so that the outward protruding portion 35 is easily bent toward the axial center when a force is applied from the outer peripheral surface toward the shaft core. An annular strength weak portion is formed at the front portion of 35. In order to form an annular weak portion, a wedge-shaped cut 91 is formed in an annular shape on the outer peripheral surface of the thin portion 38 of the ferrule 3. Thereby, an annular thin portion 92 is formed between the second notch 37 and the notch 91. Therefore, the annular thin portion 92 constitutes a weak portion for facilitating the press-fitting of the outward projection 35 into the inward projection 29.

実施の形態６はこのように構成されているため次のように作用する。外向きの突部３５を内向きの突部２９内へ圧入すると、外向きの突部３５に対して外周側から軸芯に向けて力が作用する。これにより、図１６に２点差線で示すように、環状の薄肉部９２を曲げ中心として外向きの突部３５が軸心側に撓み、外向きの突部３５の内向きの突部２９内への圧入が容易に行われる。なお、外向きの突部３５が圧入されて拡径部２９ｂに挿入された状態においては、外向きの突部３５に対して外周側から力が作用しなくなるため、外向きの突部３５が略元の形状に弾性的に復元され、外向きの突部３５が拡径部２９ｂ内に安定的に保持される。   Since the sixth embodiment is configured as described above, it operates as follows. When the outward projection 35 is press-fitted into the inward projection 29, a force acts on the outward projection 35 from the outer peripheral side toward the axis. As a result, as shown by a two-dot chain line in FIG. 16, the outward projection 35 is bent toward the axial center with the annular thin portion 92 as the bending center, and the inside of the inward projection 29 of the outward projection 35. It is easy to press fit into. In addition, in the state where the outward projection 35 is press-fitted and inserted into the enlarged diameter portion 29b, no force acts on the outward projection 35 from the outer peripheral side. It is elastically restored to a substantially original shape, and the outward projecting portion 35 is stably held in the enlarged diameter portion 29b.

（実施の形態７）
次に、実施の形態７について図１７及び図１８に基づき説明する。
実施の形態７は、実施の形態１において内向きの突部２９を後方へ撓み易くすることにより、内向きの突部２９に対する外向きの突部３５の圧入を容易にしたものである。なお、図１７は本実施の形態に係るフェルールの仮止め部の拡大図である。図１８は、結合部材の前面側から見た斜視図である。なお、この図面において実施の形態１におけると同一の構成要素には、同一の符号を付し、その説明を省略する。 (Embodiment 7)
Next, Embodiment 7 will be described with reference to FIGS.
The seventh embodiment facilitates the press-fitting of the outward projection 35 with respect to the inward projection 29 by making the inward projection 29 easier to bend backward in the first embodiment. Note that FIG. 17 is an enlarged view of the temporary fixing portion of the ferrule according to the present embodiment. FIG. 18 is a perspective view seen from the front side of the coupling member. In the drawing, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

この実施の形態における結合部材２は、図１８に示すように、内向きの突部２９における円周方向の６箇所に切欠部９５が形成されている。切欠部９５の深さ（径方向寸法）は、内向きの突部２９から拡径部２９ｂに至る深さに略設定されている。これにより、内向きの突部２９は、複数の円弧状の突起９６により形成された形状となるので、外向きの突部３５が内向きの突部２９内への圧入されると、複数の円弧状の突起９６を容易に後方へ押し曲げるように変形させることができる。これにより、外向きの突部３５の内向きの突部２９内への圧入が容易に行われる。なお、外向きの突部３５が圧入されて拡径部２９ｂに挿入された状態においては、内向きの突部２９に対する力が作用しなくなるため、複数の円弧状の突起９６が略元の形状に弾性的に復元され、外向きの突部３５が拡径部２９ｂ内に安定的に保持される。   In the coupling member 2 in this embodiment, as shown in FIG. 18, notches 95 are formed at six locations in the circumferential direction of the inward projection 29. The depth (diameter dimension) of the notch 95 is substantially set to a depth from the inward protruding portion 29 to the enlarged diameter portion 29b. As a result, the inward protruding portion 29 has a shape formed by a plurality of arc-shaped protrusions 96. Therefore, when the outward protruding portion 35 is press-fitted into the inward protruding portion 29, a plurality of inward protruding portions 29 are formed. The arc-shaped protrusion 96 can be easily deformed so as to be bent backward. As a result, the outward projection 35 can be easily press-fitted into the inward projection 29. In the state where the outward projection 35 is press-fitted and inserted into the enlarged diameter portion 29b, no force acts on the inward projection 29, so that the plurality of arc-shaped projections 96 have a substantially original shape. Thus, the outward projecting portion 35 is stably held in the enlarged diameter portion 29b.

（変形例）
上記実施の形態において以下のように変更することもできる。
・本実施の形態においては、フェルール３と結合部材２との仮止め機構は、結合部材２に対し回動可能及び所定範囲内で軸方向に移動可能に仮止めされるとともに、結合部材２に仮止めされて一体化されたたまま搬送可能、かつ、継手本体１に対し組み付け可能に構成される構造であれば他の構造に変更してもよい。 (Modification)
The above embodiment can be modified as follows.
In the present embodiment, the temporary fixing mechanism for the ferrule 3 and the coupling member 2 is temporarily fixed to the coupling member 2 so as to be rotatable with respect to the coupling member 2 and movable in the axial direction within a predetermined range. Any structure may be used as long as the structure can be transported while being temporarily fixed and integrated and can be assembled to the joint body 1.

・実施の形態４及び５において、強度的に弱い部分が円周方向の４箇所に形成されているが、これをさらに多くの箇所に施してもよい。
・また、実施の形態７においては、切欠部９５が６箇所に形成されているが、この数は圧入に必要とする力と挿入した後に安定的に保持されるかとの兼ね合いにより適宜変更することができる。また、切欠部９５の幅も同様に適宜変更することができる。さらには、切欠部９５に代えて適宜の数の単なる切れ目とすることもできる。 -In Embodiment 4 and 5, the weak part is formed in four places of the circumferential direction, However, You may give this to many places.
In addition, in Embodiment 7, the notch 95 is formed in six places, but this number should be changed appropriately according to the balance between the force required for press-fitting and whether it is stably held after insertion. Can do. Similarly, the width of the notch 95 can be changed as appropriate. Furthermore, instead of the cutout portion 95, an appropriate number of simple cuts may be used.

・実施の形態６において、環状の薄肉部９２は、第２ノッチ３７とその外周側の切込み９１との間に形成されているが、第２ノッチ３７の外周側の薄肉部３８の形状、肉厚によっては外周側の切込み９１を省略することもできる。このように、環状の薄肉部９２は、内周側の切込みのみによっても形成することができる。また、これとは逆に外周側の切込みのみによって形成することもできる。   In Embodiment 6, the annular thin portion 92 is formed between the second notch 37 and the outer peripheral cut 91, but the shape and thickness of the thin portion 38 on the outer peripheral side of the second notch 37 Depending on the thickness, the outer peripheral cut 91 may be omitted. As described above, the annular thin portion 92 can be formed only by cutting on the inner peripheral side. On the contrary, it can be formed only by cutting on the outer peripheral side.

・本体側結合部材として機能する継手本体１において、ソケット部１２には被接続装置の配管Ｐがロー付けされる構造となっているが、ソケット部１２の外周に雄ねじを形成し、被接続装置内の閉鎖弁等の機器類に直接継手本体１を取り付ける構造としてもよい。   In the joint main body 1 that functions as the main body side coupling member, the socket portion 12 has a structure in which the pipe P of the connected device is brazed, but a male screw is formed on the outer periphery of the socket portion 12 to connect the connected device. It is good also as a structure which attaches the coupling main body 1 directly to apparatuses, such as an internal closing valve.

・各実施の形態における結合部材２は、結合部材２の締結過程において管接続部２３と把持部２４とに分割しない構造としてもよい。   The coupling member 2 in each embodiment may have a structure that is not divided into the pipe connection portion 23 and the grip portion 24 in the fastening process of the coupling member 2.

本発明は、冷凍装置、空気調和装置、給湯器等の温水装置、給水装置、一般の製造設備などにおける冷媒回路、水回路、ガス回路などに使用される食い込み式管接続構造に対し適用することができる。また、本発明を適用した食い込み式管接続構造は、配管同士の接続、閉鎖弁等の弁における管継手部、その他各種装置における管継手部に適用することができる。また、本発明を適用した食い込み式管接続構造が対象とする配管は、銅管、ステンレス管などの金属管を初め樹脂配管をも包含する。   The present invention is applied to a bite type pipe connection structure used for a refrigerant circuit, a water circuit, a gas circuit, etc. in a hot water device such as a refrigeration device, an air conditioner, a water heater, a water supply device, and general production equipment. Can do. Further, the bite type pipe connection structure to which the present invention is applied can be applied to connection between pipes, pipe joints in valves such as shut-off valves, and pipe joints in various other devices. Further, the pipes targeted by the bite type pipe connection structure to which the present invention is applied include metal pipes such as copper pipes and stainless steel pipes as well as resin pipes.

本発明の実施の形態１に係る食い込み式管接続構造の断面図であって、配管接続開始の状態図である。It is sectional drawing of the bite type pipe connection structure which concerns on Embodiment 1 of this invention, Comprising: It is a state figure of pipe connection start. 同食い込み式管接続構造において、フェルールの後端部を結合部材に対し仮止めして一体化した状態図である。In the bite type pipe connection structure, the rear end portion of the ferrule is temporarily fixed to a coupling member and integrated. 同食い込み式管接続構造における継手本体の単体図面であって、（ａ）は側面図であり、（ｂ）は（ａ）におけるＡ−Ａ断面図であり、（ｃ）はカム面部の拡大図である。It is a unit drawing of the joint main body in the same bite type pipe connection structure, (a) is a side view, (b) is an AA sectional view in (a), (c) is an enlarged view of a cam surface part. It is. 同食い込み式管接続構造における結合部材の単体図面であって、（ａ）は側面図であり、（ｂ）は（ａ）におけるＢ−Ｂ断面図であり、（ｃ）は継手本体側側面に形成された仮止め機構の構成図である。It is a single figure of the coupling member in the same bite type pipe connection structure, (a) is a side view, (b) is a BB sectional view in (a), (c) is a joint body side side. It is a block diagram of the formed temporary fix | stop mechanism. 同食い込み式管接続構造におけるフェルールの単体図面であって、（ａ）は側面図であり、（ｂ）は（ａ）におけるＣ−Ｃ断面図である。It is the single drawing of the ferrule in the same bite type pipe connection structure, (a) is a side view, (b) is CC sectional drawing in (a). 同食い込み式管接続構造の部分断面図であって、配管接続完了時の状態図である。It is a fragmentary sectional view of the same bite type pipe connection structure, and is a state diagram at the time of pipe connection completion. 同食い込み式管接続構造に用いられる専用工具の斜視図である。It is a perspective view of the exclusive tool used for the bite type pipe connection structure. 本発明の実施の形態２に係る食い込み式管接続構造における仮止め機構を示した図であって、（ａ）はフェルールの側面図であり、（ｂ）は結合部材の断面図である。It is the figure which showed the temporary fix | stop mechanism in the bite type pipe connection structure concerning Embodiment 2 of this invention, Comprising: (a) is a side view of a ferrule, (b) is sectional drawing of a coupling member. 本発明の実施の形態３に係る食い込み式管接続構造における仮止め機構の構成を示した図であって、（ａ）はフェルール３の後端部仮止め機構の構成を示す拡大図であって、仮止め機構の形成途中の状態図であり、（ｂ）は仮止め機構完成後の状態図である。It is the figure which showed the structure of the temporary fix mechanism in the bite type pipe connection structure concerning Embodiment 3 of this invention, Comprising: (a) is an enlarged view which shows the structure of the rear-end part temporary fix mechanism of the ferrule 3. FIG. 4 is a state diagram in the middle of forming the temporary fixing mechanism, and FIG. 4B is a state diagram after completion of the temporary fixing mechanism. 本発明の実施の形態４に係るフェルールの単体図面であって、（ａ）はフェルールの後面図であり、（ｂ）は（ａ）におけるＤ−Ｄ断面図である。It is a single figure of the ferrule which concerns on Embodiment 4 of this invention, Comprising: (a) is a rear view of a ferrule, (b) is DD sectional drawing in (a). 同フェルールを結合部材の内向き突部の奥へ圧入するときの、フェルールの後面図である。FIG. 6 is a rear view of the ferrule when the ferrule is press-fitted into the back of the inward protrusion of the coupling member. 同フェルールの斜視図である。It is a perspective view of the same ferrule. 本発明の実施の形態５に係るフェルールの単体図面であって、（ａ）はフェルールの後面図であり、（ｂ）は（ａ）におけるＥ−Ｅ断面図である。It is the single figure of the ferrule which concerns on Embodiment 5 of this invention, Comprising: (a) is a rear view of a ferrule, (b) is EE sectional drawing in (a). 同フェルールを結合部材の内向き突部の奥へ圧入するときの、フェルールの後面図である。FIG. 6 is a rear view of the ferrule when the ferrule is press-fitted into the back of the inward protrusion of the coupling member. 同フェルールの斜視図である。It is a perspective view of the same ferrule. 本発明の実施の形態６に係るフェルールの仮止め部の拡大図である。It is an enlarged view of the temporary fix | stop part of the ferrule which concerns on Embodiment 6 of this invention. 本発明の実施の形態７に係るフェルールの仮止め部の拡大図である。It is an enlarged view of the temporary fix | stop part of the ferrule which concerns on Embodiment 7 of this invention. 同実施の形態に係る結合部材の前面側から見た斜視図である。It is the perspective view seen from the front side of the coupling member concerning the embodiment. 従来の食い込み式管接続構造の断面図であって、締結始めの状態図である。It is sectional drawing of the conventional bite type pipe connection structure, Comprising: It is a state figure of the fastening start.

符号の説明Explanation of symbols

Ｐ…配管、１…継手本体、２…結合部材、３…フェルール、１１…基部、１３…雌ねじ筒部、１３ａ…雌ねじ部、１６…配管差込口、１９…カム面、２３…管接続部、２３ａ…雄ねじ部、２７…凹部、２８…押圧面、２９…（内向きの）突部、２９ｂ…拡径部、３３…テーパ面、３５…（外向きの）突部、７１…雌ねじ、７２…雄ねじ、８１…窪み部、８２．８６．９２…薄肉部、８５…貫通孔、９１…切込み、９５…切欠部。   P ... pipe, 1 ... joint body, 2 ... coupling member, 3 ... ferrule, 11 ... base, 13 ... female screw cylinder, 13a ... female screw, 16 ... pipe insertion port, 19 ... cam surface, 23 ... pipe connection , 23a ... male screw portion, 27 ... concave portion, 28 ... pressing surface, 29 ... (inward) protrusion, 29b ... diameter-expanded portion, 33 ... tapered surface, 35 ... (outward) protrusion, 71 ... female screw, 72 ... male screw, 81 ... recessed portion, 82.86.92 ... thin wall portion, 85 ... through hole, 91 ... notch, 95 ... notch.

Claims (15)

継手本体と、継手本体に螺合されて組み付けされる結合部材と、継手本体及び結合部材とは別体に形成されるとともに、継手本体と結合部材との間に挟着されるフェルールとを備えた食い込み式管接続構造において、
前記継手本体は、結合部材を螺合する雌ねじ部が内周面に形成された雌ねじ筒部と、雌ねじ筒部の側壁をなす基部と、基部の軸心部に形成された接続すべき配管を差し込むための配管差込口と、配管差込口の入口部に形成されたカム面とを有し、
前記結合部材は、前記雌ねじ部に螺合される雄ねじ部が外周に形成された管接続部と、この管接続部の継手本体側端部に形成されたフェルールの後端部を押圧する押圧面とを有し、
前記フェルールは、その先端部が前記カム面に密接されるテーパ面に形成されるとともに、その後端部が、前記管接続部の継手本体側端部において結合部材に対し回動可能及び所定範囲内で軸方向に移動可能に仮止めされるとともに、結合部材に仮止めされて一体化されたたまま継手本体に対し組み付け可能に構成されていることを特徴とする食い込み式管接続構造。 A joint body, a coupling member screwed into the joint body and assembled, and a ferrule formed separately from the joint body and the coupling member and sandwiched between the joint body and the coupling member In the bite type pipe connection structure,
The joint body includes an internal thread cylinder portion in which an internal thread portion for screwing a coupling member is formed on an inner peripheral surface, a base portion forming a side wall of the internal thread cylinder portion, and a pipe to be connected formed in an axial center portion of the base portion. A pipe insertion port for insertion, and a cam surface formed at the inlet of the pipe insertion port;
The coupling member includes a pipe connection portion formed on the outer periphery of a male screw portion that is screwed into the female screw portion, and a pressing surface that presses a rear end portion of a ferrule formed on a joint body side end portion of the pipe connection portion. And
The ferrule is formed with a tapered surface whose front end is in close contact with the cam surface, and its rear end is rotatable with respect to the coupling member at a joint body side end of the pipe connecting portion and within a predetermined range. The bite type pipe connection structure is configured to be temporarily fixed so as to be movable in the axial direction and to be able to be assembled to the joint body while being temporarily fixed to the coupling member and integrated. 前記結合部材は、前記管接続部の前記継手本体側端部に、側面を軸方向に窪ませた凹部を有し、この凹部は、奥部に前記押圧面が形成されるとともに、入口部に径方向内向きの突部が形成され、さらに、この内向きの突部と前記押圧面との間に拡径部が形成され、
前記フェルールは、後端部に径方向外向きの突部が形成され、この外向きの突部の外径が前記管接続部の内向きの突部の内径より大きく形成されるとともに、突部の軸方向長さが拡径部の軸方向長さより小さく形成され、さらに、この外向きの突部が前記径方向内向きの突部を介して拡径部内に挿入されて保持されるように構成されている
ことを特徴とする請求項１記載の食い込み式管接続構造。 The coupling member has a concave portion with a side surface recessed in the axial direction at an end of the pipe connecting portion on the joint body side, and the concave portion has the pressing surface formed at the back and the inlet portion. A radially inward projection is formed, and further, an enlarged diameter portion is formed between the inward projection and the pressing surface,
The ferrule is formed with a radially outward projection at the rear end, and the outer diameter of the outward projection is larger than the inner diameter of the inward projection of the pipe connecting portion. The axial length is smaller than the axial length of the enlarged diameter portion, and the outward projection is inserted and held in the enlarged diameter portion via the radially inward projection. The bite type pipe connection structure according to claim 1, wherein the bite type pipe connection structure is configured. 前記フェルールの外向きの突部は、その外径が、前記拡径部に挿入される前に前記凹部の内向きの突部の内径より大きく形成されており、前記凹部の内向きの突部内に圧入されて前記拡径部に挿入されていることを特徴とする請求項２記載の食い込み式管接続構造。   The outward protrusion of the ferrule is formed so that its outer diameter is larger than the inner diameter of the inward protrusion of the recess before being inserted into the enlarged diameter portion. The bite type pipe connecting structure according to claim 2, wherein the biting type pipe connecting structure is press-fitted into the diameter-expanded portion and is inserted into the enlarged diameter portion. 前記フェルールの外向きの突部は、その外径が、前記拡径部に挿入される前には前記凹部の内向きの突部の内径より小さく形成されており、前記拡径部に挿入された後に前記押圧面に圧接されて変形し、前記凹部の内向きの突部の内径より大きく形成されることを特徴とする請求項２記載の食い込み式管接続構造。   The outward protrusion of the ferrule is formed so that its outer diameter is smaller than the inner diameter of the inward protrusion of the recess before being inserted into the enlarged diameter portion, and is inserted into the enlarged diameter portion. 3. The bite type pipe connection structure according to claim 2, wherein the biting type pipe connection structure is formed so as to be deformed by being pressed against the pressing surface and then being larger than the inner diameter of the inward projection of the recess. 前記凹部の内向きの突部の内周端面には雌ねじが形成され、前記フェルールの外向きの突部の外周端面には、前記結合部材の内向きの突部の内周端面に形成された雌ねじに螺合される雄ねじが形成されていることを特徴とする請求項２記載の食い込み式管接続構造。   An internal thread is formed on the inner peripheral end surface of the inward protruding portion of the recess, and the outer peripheral end surface of the outward protruding portion of the ferrule is formed on the inner peripheral end surface of the inward protruding portion of the coupling member. 3. The bite type pipe connection structure according to claim 2, wherein a male screw screwed with the female screw is formed. 前記フェルールは、前記外向きの突部を前記内向きの突部内への圧入を容易にするための強度的に弱い部分が形成されていることを特徴とする請求項３記載の食い込み式管接続構造。   4. The bite type pipe connection according to claim 3, wherein the ferrule is formed with a weakly strong portion for facilitating press-fitting of the outward protrusion into the inward protrusion. Construction. 前記フェルールは、前記強度的に弱い部分が形成されることにより、圧入部付近の断面形状が圧入前と圧入時とで異なることを特徴とする請求項６記載の食い込み式管接続構造。   The bite type pipe connection structure according to claim 6, wherein the ferrule has a weak portion so that a cross-sectional shape in the vicinity of the press-fitting portion is different between before press-fitting and during press-fitting. 前記強度的に弱い部分は、円周方向の複数箇所において前記外向き突部又はその先端側から後端にかけて径方向に窪む窪み部が形成され、この窪み部により径方向の肉厚が薄い薄肉部が後端部に断続的に形成された構成であることを特徴とする請求項６又は７記載の食い込み式管接続構造。   The weak portion is formed with the outward projecting portion or a recessed portion that is recessed in the radial direction from the front end side to the rear end at a plurality of locations in the circumferential direction, and the thickness in the radial direction is thin due to the recessed portion. The bite type pipe connection structure according to claim 6 or 7, wherein the thin wall portion is formed intermittently at the rear end portion. 前記強度的に弱い部分は、円周方向の複数箇所において前記外向き突部の軸方向前後にかけて径方向の貫通孔が形成され、この貫通孔により軸方向の肉厚が薄い薄肉部が後端部に断続的に形成された構成であることを特徴とする請求項６又は７記載の食い込み式管接続構造。   In the weak portion, a radial through hole is formed at a plurality of locations in the circumferential direction before and after the outward projecting portion in the axial direction, and a thin portion with a small axial thickness is formed at the rear end by the through hole. The bite type pipe connection structure according to claim 6 or 7, wherein the structure is formed intermittently in the portion. 前記強度的に弱い部分は、前記フェルールにおける外向き突部の先端側において外周側及び内周側から、又は外周側又は内周側の何れか一方側から環状の切込みが形成され、この環状の切込みにより径方向の肉厚が薄い環状の薄肉部が前記外向き突部の先端側に形成された構成であることを特徴とする請求項６記載の食い込み式管接続構造。   The weak portion is formed with an annular cut from the outer peripheral side and the inner peripheral side or from either the outer peripheral side or the inner peripheral side at the tip side of the outward projecting portion of the ferrule. 7. The bite type pipe connection structure according to claim 6, wherein an annular thin portion having a thin radial thickness is formed on the tip side of the outward projecting portion by cutting. 前記結合部材は、前記外向きの突部を前記内向きの突部内への圧入を容易にするための切れ目部又は切欠部が、前記内向きの突部における円周方向の数箇所に形成されていることを特徴とする請求項３記載の食い込み式管接続構造。   In the coupling member, cuts or notches for facilitating press-fitting of the outward protrusions into the inward protrusions are formed at several locations in the circumferential direction of the inward protrusions. The bite type pipe connection structure according to claim 3, wherein the bite type pipe connection structure is provided. 請求項１〜１１の何れか１項に記載の管接続構造を管継手部に用いた弁。   The valve which used the pipe connection structure of any one of Claims 1-11 for a pipe joint part. 請求項１〜１１の何れか１項に記載の管接続構造を管継手部に用いた食い込み式管継手。   The bite type pipe joint which used the pipe connection structure of any one of Claims 1-11 for the pipe joint part. 請求項１２記載の弁を冷媒回路に用いたことを特徴とする冷凍装置。   A refrigeration apparatus using the valve according to claim 12 in a refrigerant circuit. 請求項１３記載の食い込み式管継手を冷媒回路に用いたことを特徴とする冷凍装置。   A refrigeration apparatus using the bite type pipe joint according to claim 13 in a refrigerant circuit.
JP2008241659A 2008-07-23 2008-09-19 Flareless pipe coupling structure, valve, flareless pipe fitting, and refrigerating device Pending JP2010048409A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2008241659A JP2010048409A (en) 2008-07-23 2008-09-19 Flareless pipe coupling structure, valve, flareless pipe fitting, and refrigerating device
PCT/JP2009/063083 WO2010010884A1 (en) 2008-07-23 2009-07-22 Flareless pipe coupling structure, valve, flareless pipe fitting, and refrigerating device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008190264 2008-07-23
JP2008241659A JP2010048409A (en) 2008-07-23 2008-09-19 Flareless pipe coupling structure, valve, flareless pipe fitting, and refrigerating device

Publications (1)

Publication Number Publication Date
JP2010048409A true JP2010048409A (en) 2010-03-04

Family

ID=41570344

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2008241659A Pending JP2010048409A (en) 2008-07-23 2008-09-19 Flareless pipe coupling structure, valve, flareless pipe fitting, and refrigerating device

Country Status (2)

Country Link
JP (1) JP2010048409A (en)
WO (1) WO2010010884A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012225354A (en) * 2011-04-15 2012-11-15 Jfe Pipe Fitting Mfg Co Ltd Pipe joint
WO2013047302A1 (en) * 2011-09-30 2013-04-04 ダイキン工業株式会社 Flareless tube connection structure
US8931810B2 (en) 2010-01-21 2015-01-13 Swagelok Company Conduit gripping device having retaining structure for conduit fitting
KR20190091283A (en) * 2016-12-21 2019-08-05 시티에스 코포레이션 Radio frequency antenna having particulate or particulate insulation and method for manufacturing same

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8569070B2 (en) 2010-07-16 2013-10-29 Idex Health & Science Llc Connection assembly for ultra high pressure liquid chromatography
EP3181208B1 (en) 2010-08-10 2022-06-15 Idex Health&Science LLC Biocompatible tubing for liquid chromatography systems
KR102398921B1 (en) * 2014-05-09 2022-05-16 스와겔로크 컴패니 Conduit fitting with components adapted for facilitating assembly
US11187360B2 (en) 2014-10-23 2021-11-30 Idex Health & Science Llc Fluidic connector assembly for quick connect/disconnect
WO2016065334A1 (en) 2014-10-23 2016-04-28 Idex Health & Science Llc Face-sealing fluidic connection system
US9671048B2 (en) 2014-10-23 2017-06-06 Idex Health & Science Llc Manifold connection assembly
JP2021055815A (en) * 2019-10-02 2021-04-08 サーパス工業株式会社 Joint structure, joint unit, and assembling method of joint unit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005337326A (en) * 2004-05-25 2005-12-08 Nasco Fitting Kk Pipe joint
JP2008069811A (en) * 2006-09-12 2008-03-27 Daikin Ind Ltd Bite-into type pipe joint, refrigeration device and water heater
JP2008144908A (en) * 2006-12-12 2008-06-26 Daikin Ind Ltd Pipe joint
JP2008144909A (en) * 2006-12-12 2008-06-26 Daikin Ind Ltd Pipe joint

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005337326A (en) * 2004-05-25 2005-12-08 Nasco Fitting Kk Pipe joint
JP2008069811A (en) * 2006-09-12 2008-03-27 Daikin Ind Ltd Bite-into type pipe joint, refrigeration device and water heater
JP2008144908A (en) * 2006-12-12 2008-06-26 Daikin Ind Ltd Pipe joint
JP2008144909A (en) * 2006-12-12 2008-06-26 Daikin Ind Ltd Pipe joint

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8931810B2 (en) 2010-01-21 2015-01-13 Swagelok Company Conduit gripping device having retaining structure for conduit fitting
JP2012225354A (en) * 2011-04-15 2012-11-15 Jfe Pipe Fitting Mfg Co Ltd Pipe joint
WO2013047302A1 (en) * 2011-09-30 2013-04-04 ダイキン工業株式会社 Flareless tube connection structure
JP2013076455A (en) * 2011-09-30 2013-04-25 Daikin Industries Ltd Flareless tube connection structure
KR20190091283A (en) * 2016-12-21 2019-08-05 시티에스 코포레이션 Radio frequency antenna having particulate or particulate insulation and method for manufacturing same
JP2020502917A (en) * 2016-12-21 2020-01-23 シーティーエス・コーポレーションＣｔｓ Ｃｏｒｐｏｒａｔｉｏｎ High frequency antenna with granular or powdered insulating material and method of manufacturing the same
JP7107936B2 (en) 2016-12-21 2022-07-27 シーティーエス・コーポレーション High frequency antenna with granular or powdered insulation and method of making same
KR102474315B1 (en) * 2016-12-21 2022-12-07 시티에스 코포레이션 Radio frequency antenna having particulate or particulate insulation and manufacturing method thereof

Also Published As

Publication number Publication date
WO2010010884A1 (en) 2010-01-28

Similar Documents

Publication Publication Date Title
JP2010048409A (en) Flareless pipe coupling structure, valve, flareless pipe fitting, and refrigerating device
WO2013047304A1 (en) Tube connection structure
WO2013047302A1 (en) Flareless tube connection structure
JP5326457B2 (en) Biting type pipe connection structure, valve, biting type pipe fitting and refrigeration system
JP4557081B2 (en) Biting type pipe connection structure, valve, biting type pipe fitting and refrigeration system
JP5899767B2 (en) Bite-type pipe connection structure
JP2010190325A (en) Pipe connection structure, fastening and loosening tool, valve, pipe joint, and refrigerating device
WO2010010885A1 (en) Flareless pipe coupling structure, valve using the flareless pipe coupling structure, flareless pipe fitting, and refrigerating device
JP2009063090A (en) Flared type pipe connecting structure, valve, flared type pipe joint and refrigeration unit
JP2008082373A (en) Bite type pipe joint, freezing equipment, and water heater
JP4656210B2 (en) Biting type pipe connection structure, valve, biting type pipe fitting and refrigeration system
JP5320884B2 (en) Biting type pipe connection structure, valve, biting type pipe fitting and refrigeration system
JP2009085342A (en) Bite type pipe connection structure, valve, bite type pipe joint, and refrigeration equipment
JP2010060047A (en) Bite type pipe connecting structure, valve, bite type pipe connector, and refrigerating device
JP2009085343A (en) Bite type pipe connection structure, valve, bite type pipe joint, and freezing equipment
JP2010156370A (en) Flareless type pipe connection structure, valve, flareless type pipe joint, and refrigeration device
JP5359087B2 (en) Biting type pipe connection structure, valve, biting type pipe fitting and refrigeration system
JP5381093B2 (en) Biting type pipe connection structure, valve, biting type pipe fitting and refrigeration system
JP5320883B2 (en) Biting type pipe connection structure, valve, biting type pipe fitting and refrigeration system
JP4618117B2 (en) Piping connection method and pipe fitting
JP2009068564A (en) Bite-in type pipe connection structure, valve, bite-in type pipe joint and refrigerating apparatus
JP2008082372A (en) Bite type pipe joint, freezing equipment, and water heater
JP2009150443A (en) Pipe connection structure, valve, pipe joint, and refrigeration device

Legal Events

Date Code Title Description
A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20091211

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20100413

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20100803