JP2010236567A

JP2010236567A - Hose joint

Info

Publication number: JP2010236567A
Application number: JP2009082272A
Authority: JP
Inventors: Takashi Ida; 剛史井田; Yasuhiro Ikeuchi; 康裕池内; Satoyuki Masukane; 智行増金
Original assignee: Togawa Rubber Co Ltd; Taiyo Kagaku KK
Current assignee: Togawa Rubber Co Ltd; Taiyo Kagaku KK
Priority date: 2009-03-30
Filing date: 2009-03-30
Publication date: 2010-10-21
Anticipated expiration: 2029-03-30
Also published as: JP5415801B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hose joint having the least possible number of components and an easily reduced weight for hardly causing such an event that locking capability is lost by rust. <P>SOLUTION: The hose joint includes a nipple member 3 having one end to which a hose can be joined, and an intermediate member 10 having one end which can be joined to the equipment side, wherein a locking mechanism 30 is provided between the nipple member 3 and the intermediate member 10 for connecting both members to each other at the other ends rotatably around their axial centers. Both members 3, 10 are each formed of a resin, and the locking mechanism 30 includes an elastic locking piece 5b formed on the outer periphery of one of both members, and a locked groove 10d formed in the other into which the elastic locking piece 5b is locked during connection. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、ホースを接合可能な一端を備えたニップル部材と、機器側に接合可能な一端を備えた中間部材とを備え、前記ニップル部材の他端と前記中間部材の他端の間に、両部材どうしを軸心周りで回転可能に連結する係止機構が設けられているホース継手に関する。 The present invention comprises a nipple member provided with one end capable of joining a hose, and an intermediate member provided with one end capable of being joined to the device side, between the other end of the nipple member and the other end of the intermediate member, The present invention relates to a hose joint provided with a locking mechanism that connects both members to be rotatable around an axis.

この種のホース継手に関連する先行技術文献情報として下記に示す特許文献１がある。この特許文献１に記されたホース継手は、ホースを接合可能な一端を備えた第１部材と、機器側に接合可能な一端を備えた第２部材とを備え、両部材の他端どうしを軸心周りで回転可能に連結する係止機構として、第１部材の他端にはメス型筒状部が、第２部材の他端にはオス型筒状部が設けられ、さらに、メス型筒状部の内周面に形成された係止溝には、弾性変形可能なように周の一部が切り取られた係止リングが係入されている。オス型筒状部をメス型筒状部に嵌合させる際に、係止リングは一旦拡径されながら、オス筒状部の外側テーパ部を乗り上がり、最終的にオス筒状部の外周面に形成された台形溝に縮径してスナップインされることで、一旦連結後は分離不可能となる継手が提供されている。 There exists patent document 1 shown below as prior art document information relevant to this kind of hose coupling. The hose joint described in Patent Document 1 includes a first member having one end capable of joining a hose and a second member having one end capable of being joined to the device side, and the other ends of both members are connected to each other. As a locking mechanism that is rotatably connected around the axis, a female cylindrical portion is provided at the other end of the first member, a male cylindrical portion is provided at the other end of the second member, and a female type is further provided. A locking ring formed by cutting a part of the circumference so as to be elastically deformable is engaged with the locking groove formed on the inner peripheral surface of the cylindrical portion. When the male cylindrical portion is fitted to the female cylindrical portion, the locking ring climbs the outer tapered portion of the male cylindrical portion while being expanded in diameter, and finally the outer peripheral surface of the male cylindrical portion. There is provided a joint which is reduced in diameter and snapped into a trapezoidal groove formed so that it cannot be separated once connected.

特開２００８−１８０３６６号公報（００４２段落、図１）JP 2008-180366 A (0042 paragraph, FIG. 1)

しかし、特許文献１に記されたホース継手では、係止機構を構成する係止リングが第１部材および第２部材とは別に必要となるため、部品点数が多いという課題があった。また、係止機構を構成する係止リングはステンレス鋼などの金属で形成されているため、置かれる環境によって錆などが生じて係止能力を失う虞があった。また、特許文献１に記されたホース継手の継手本体を仮に樹脂で形成した場合、使用中に継手本体が金属製の係止リングによって損耗する虞があるため、継手本体も金属による構成を強いられるため、必要な堅牢度を保持したまま軽量化することが困難であった。 However, the hose joint described in Patent Document 1 has a problem that the number of parts is large because a locking ring constituting the locking mechanism is required separately from the first member and the second member. Moreover, since the locking ring which comprises a locking mechanism is formed with metals, such as stainless steel, there exists a possibility that rust etc. may arise according to the environment where it is set | placed, and a locking capability may be lost. Further, if the joint body of the hose joint described in Patent Document 1 is formed of resin, the joint body may be worn out by the metal locking ring during use, so the joint body is also strongly composed of metal. Therefore, it has been difficult to reduce the weight while maintaining the required fastness.

そこで、本発明の目的は、上に例示した各従来技術によるホース継手が与える課題に鑑み、部品点数ができるだけ少ないホース継手を提供することにある。
また、本発明の他の目的は、錆などで係止能力を失う事態の生じ難い、また、軽量化し易いホース継手を提供することにある。 Accordingly, an object of the present invention is to provide a hose joint having as few parts as possible in view of the problems given by the conventional hose joints exemplified above.
Another object of the present invention is to provide a hose joint that is unlikely to lose its locking ability due to rust or the like and that is easy to reduce in weight.

本発明の第１の特徴構成は、
ホースを接合可能な一端を備えたニップル部材と、
機器側に接合可能な一端を備えた中間部材とを備え、
前記ニップル部材と前記中間部材の間に、両部材の他端どうしを軸心周りで回転可能に連結する係止機構が設けられているホース継手であって、
前記両部材がいずれも樹脂で形成されていること、および
前記係止機構が、前記両部材の一方の外周部に形成された弾性係止片と、前記連結に際して、前記弾性係止片が係入されるように前記両部材の他方の内周面に形成された被係止溝とを備えている点にある。 The first characteristic configuration of the present invention is:
A nipple member having one end to which a hose can be joined;
An intermediate member having one end that can be joined to the device side;
Between the nipple member and the intermediate member, a hose coupling provided with a locking mechanism for connecting the other ends of both members so as to be rotatable around an axis,
Both the members are made of resin, and the locking mechanism is connected to an elastic locking piece formed on one outer peripheral portion of the both members, and the elastic locking piece is engaged during the connection. It is in the point provided with the to-be-latched groove formed in the other internal peripheral surface of the said both members so that it may enter.

本発明の第１の特徴構成によるホース継手では、ニップル部材と中間部材の双方が樹脂で形成されているため、ホース継手が軽量化される。
また、係止機構を構成する弾性係止片も樹脂で形成されているため、多湿環境に置かれても係止機構が錆などで係止能力を失う虞が少ない。
さらに、係止機構が一方の部材の外周部に形成された弾性係止片と、前記連結に応じて、前記弾性係止片が係止されるように他方の部材の内周面に形成された被係止溝とを備えるので、弾性係止片が部材の内周面に形成された構成などに比して、流路断面積を確保し易い。また、流路の壁面に凹凸が生じ難いため、流路を流れる流体が同壁面から受ける抵抗や圧損を小さくできる。 In the hose joint according to the first characteristic configuration of the present invention, since both the nipple member and the intermediate member are made of resin, the hose joint is reduced in weight.
In addition, since the elastic locking piece constituting the locking mechanism is also formed of resin, there is little possibility that the locking mechanism loses its locking capability due to rust even when placed in a humid environment.
Furthermore, a locking mechanism is formed on the inner peripheral surface of the other member so that the elastic locking piece is locked in response to the elastic locking piece formed on the outer peripheral portion of one member and the connection. Therefore, it is easy to ensure the cross-sectional area of the flow path as compared with a configuration in which the elastic locking piece is formed on the inner peripheral surface of the member. Further, since unevenness is hardly generated on the wall surface of the flow path, it is possible to reduce resistance and pressure loss that the fluid flowing through the flow path receives from the wall surface.

本発明の他の特徴構成は、前記中間部材は、雄ネジを備えたオス型中間部材または雌ネジを備えたメス型中間部材からなり、前記オス型中間部材と前記メス型中間部材はいずれも同一形状の前記ニップル部材と係止可能な前記係止機構を有する点にある。 According to another characteristic configuration of the present invention, the intermediate member includes a male intermediate member having a male screw or a female intermediate member having a female screw, and both the male intermediate member and the female intermediate member are It has the said latching mechanism which can be latched with the said nipple member of the same shape.

本構成であれば、一種類のニップル部材を、オス型中間部材とメス型中間部材とのいずれにも連結可能な共用部材として使用できる。したがって、ニップル部材としてオス型の中間部材用とメス型の中間部材用との２種類を製造する必要がないため、ニップル部材のコストを安くできる。ニップル部材と中間部材との組み付け時に、オス型の中間部材用のニップル部材とメス型の中間部材用のニップル部材とを取り違える誤操作がなくなる。また、ホース継手を構成する部品は、全部でオス型の中間部材とメス型の中間部材と共用のニップル部材と３種類で済むため、ホース継手を構成する各部品の保管システムや管理システムが非常に簡単なものにできる。 If it is this structure, one kind of nipple member can be used as a common member which can be connected with both a male type | mold intermediate member and a female type | mold intermediate member. Therefore, since it is not necessary to manufacture two types of nipple members, one for a male intermediate member and one for a female intermediate member, the cost of the nipple member can be reduced. At the time of assembling the nipple member and the intermediate member, there is no erroneous operation in which the nipple member for the male intermediate member and the nipple member for the female intermediate member are mistaken. In addition, the parts that make up the hose joints can be composed of only three types: a male-type intermediate member, a female-type intermediate member, and a common nipple member. Can be simple.

本発明の他の特徴構成は、前記両部材の前記一方に、前記連結を完了した状態において、前記両部材の他方と軸心方向で当接可能なフランジ部が設けられており、前記弾性係止片は前記フランジ部から延設されている点にある。 According to another characteristic configuration of the present invention, the one of the two members is provided with a flange portion that can contact the other of the two members in the axial direction in a state where the connection is completed. The stop piece is in a point extending from the flange portion.

本構成であれば、連結完了後の両部材に対して軸心を折り曲げるような外力が加わった場合にも、フランジ部と両部材の他方とが互いに当接し合うことで、折り曲げの変形に耐える反力が生じるため、両部材のいずれか又は双方が同外力によって破損する虞が少なくなり、樹脂化による強度不足の問題を十分にクリアできることになる。 With this configuration, even when an external force that bends the shaft center is applied to both members after completion of the connection, the flange portion and the other of the two members abut against each other to withstand bending deformation. Since the reaction force is generated, there is less possibility that one or both of the members are damaged by the same external force, and the problem of insufficient strength due to resinization can be sufficiently cleared.

本発明の他の特徴構成は、前記係止機構が、前記ニップル部材の前記他端に設けられたオス型の嵌合筒部と、前記中間部材の前記他端に設けられ、前記嵌合筒部と嵌合されるメス型の被嵌合筒部とを含む点にある。 Another feature of the present invention is that the locking mechanism is provided at the other end of the intermediate member, and a male fitting tube portion provided at the other end of the nipple member. And a female-type fitting cylinder portion to be fitted to the portion.

本構成であれば、連結完了後の状態では、嵌合筒部と被嵌合筒部とが二重筒状に嵌合しているので、仮に両部材の軸心を折り曲げるような外力、或いは、両部材の各軸心どうしをずらすような向きの外力が働いても、これらの外力を受ける反力が嵌合筒部と被嵌合筒部との間に生じるので、弾性係止片に対して過剰な応力が作用し難い。 If it is this structure, since the fitting cylinder part and the to-be-fitted cylinder part are fitted in the double cylinder shape in the state after completion of the connection, an external force that temporarily folds the shaft centers of both members, or Even if an external force acting in such a direction as to shift the axial centers of the two members is applied, a reaction force that receives these external forces is generated between the fitting tube portion and the fitting tube portion. On the other hand, it is difficult for excessive stress to act.

本発明の他の特徴構成は、前記中間部材は雌ネジを備えたメス型中間部材であり、このメス型中間部材は、前記一端と前記他端との間に径方向内側に突出した環状小径部を備え、前記環状小径部の前記一端側の端面には、前記メス型中間部材の前記雌ネジに螺合される雄ネジ部の端面と圧着可能なシール部材のための取り付け部が設けられている点にある。 In another aspect of the present invention, the intermediate member is a female intermediate member having a female screw, and the female intermediate member has an annular small diameter protruding inward in the radial direction between the one end and the other end. The end face of the annular small diameter part on the one end side is provided with an attachment part for a seal member that can be crimped to the end face of the male screw part screwed into the female screw of the female intermediate member. There is in point.

本構成であれば、メス型の中間部材を機器にねじ込み等で取り付ける際に、機器側の管の端面からパッキンに加えられる押し付け力を環状小径部によって受け止めることができるので、同押し付け力がニップル部材の弾性係止片などに及ぶ虞が少ない。したがって、環状小径部がなくパッキンがニップル部材に近接している構成などに比して、上記ねじ込み操作によって弾性係止片が破損する虞がないため、樹脂化による強度不足の問題がクリアできる。 With this configuration, when the female intermediate member is attached to the device by screwing or the like, the pressing force applied to the packing from the end surface of the tube on the device side can be received by the annular small diameter portion. There is little risk of reaching the elastic locking piece of the member. Therefore, as compared with a configuration in which there is no annular small-diameter portion and the packing is close to the nipple member, there is no possibility that the elastic locking piece is damaged by the screwing operation, so the problem of insufficient strength due to resinization can be cleared.

本発明の他の特徴構成は、前記ニップル部材と前記中間部材との間に、互いに軸心が交差した一端と他端とを備えたエルボ状の補助部材を連結可能であり、且つ、前記補助部材の前記一端は、前記係止機構によって前記ニップル部材の前記他端と軸心周りで回転可能に連結可能であり、前記補助部材の前記他端は、前記係止機構によって前記中間部材の前記他端と軸心周りで回転可能に連結可能とされている点にある。 According to another characteristic configuration of the present invention, an elbow-shaped auxiliary member having one end and the other end whose axial centers intersect each other can be connected between the nipple member and the intermediate member, and the auxiliary The one end of the member is connectable to the other end of the nipple member by the locking mechanism so as to be rotatable around an axis, and the other end of the auxiliary member is connected to the intermediate member by the locking mechanism. It is in the point which can be connected with an other end and an axial center so that rotation is possible.

本構成であれば、ホースを接合可能なニップル部材と機器側に接合可能な中間部材とを、互いに軸心が交差した形で、しかも、ホースおよび機器側に対して回転可能に接合することが可能となるので、機器に接続したホースの取り回しが容易になる。 With this configuration, the nipple member that can join the hose and the intermediate member that can be joined to the equipment side can be joined to each other so that the shaft centers intersect with each other and to the hose and the equipment side so as to be rotatable. This makes it possible to easily handle the hose connected to the device.

本発明の他の特徴構成は、前記弾性係止片は前記ニップル部材に設けられており、前記ニップル部材を構成する樹脂材料として、前記中間部材を構成する樹脂材料よりも降伏歪の大きな材料が用いられている点にある。 In another characteristic configuration of the present invention, the elastic locking piece is provided on the nipple member, and a resin material constituting the nipple member is a material having a larger yield strain than a resin material constituting the intermediate member. It is in the point used.

本構成であれば、ニップル部材に降伏歪の大きな材料を用いることで、弾性係止片に対して好適な弾性を持たせることができる。また、降伏歪の大きな材料は一般に硬度が小さいが、ニップル部材には機器側のネジと接続するためのネジ部などが不要なため特に高い硬度は必要でない。他方、中間部材に降伏歪は小さいが硬度の大きな材料を用いることで、一般に鉄などの金属で構成された機器側のネジと接続するための中間部材のネジ部に好適な硬度を持たせることができる。 If it is this structure, suitable elasticity can be given with respect to an elastic locking piece by using a material with a big yield distortion for a nipple member. A material having a large yield strain generally has a small hardness, but the nipple member does not require a screw portion for connecting to a screw on the device side, so that a particularly high hardness is not necessary. On the other hand, by using a material with low yield strain but high hardness for the intermediate member, the screw part of the intermediate member for connecting to the device side screw generally made of metal such as iron should have suitable hardness. Can do.

本発明によるホース継手セットを示す斜視図である。It is a perspective view which shows the hose coupling set by this invention. 一方の種類のホース継手セットを示す縦断面図である。It is a longitudinal cross-sectional view which shows one kind of hose coupling set. 他方の種類のホース継手セットを示す縦断面図である。It is a longitudinal cross-sectional view which shows the other kind of hose coupling set. ホース継手セットの連結過程を示す縦断面図である。It is a longitudinal cross-sectional view which shows the connection process of a hose coupling set. ホース継手セットの別実施形態を示す斜視図である。It is a perspective view which shows another embodiment of a hose coupling set.

以下に本発明を実施するための形態について図面を参照しながら説明する。
図１に示すホース継手セット５０は、補強層を備えた強化ガスホース１を接合可能なニップル部材３と、機器側に接合可能な中間部材とを備える。ニップル部材３と中間部材とはいずれも樹脂で形成されており、ニップル部材３と中間部材との間には、両部材の他端どうしを軸心周りで回転可能に連結する係止機構３０が設けられている。中間部材としては、一端に雄ネジを備えたオス型中間部材１０と、一端に雌ネジを備えたメス型中間部材２０の二種類が用意されているが、ニップル部材３は、オス型中間部材１０とメス型中間部材２０とのいずれにも同様に連結可能な共用形状を有する。これらニップル部材３および各中間部材１０，２０はいずれも射出成形によって一体的に形成されている。 EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated, referring drawings.
A hose coupling set 50 shown in FIG. 1 includes a nipple member 3 capable of joining a reinforced gas hose 1 having a reinforcing layer and an intermediate member joinable to the apparatus side. The nipple member 3 and the intermediate member are both formed of resin, and a locking mechanism 30 is provided between the nipple member 3 and the intermediate member so as to connect the other ends of the two members so as to be rotatable around the axis. Is provided. There are two types of intermediate members, a male intermediate member 10 having a male screw at one end and a female intermediate member 20 having a female screw at one end. The nipple member 3 is a male intermediate member. 10 and the female intermediate member 20 have a common shape that can be similarly connected. Both the nipple member 3 and the intermediate members 10 and 20 are integrally formed by injection molding.

（ニップル部材の構成）
図１−３に示すように、ニップル部材３は、直線状の軸心を備えた概して管状を呈し、強化ガスホース１のソケット部１ａを外嵌接続するためのタケノコ部３ａ（ニップル部）と、タケノコ部３ａの基端から反対側に延び、各中間部材１０，２０を連結させる連結部３ｂとを備えている。連結部３ｂは、各中間部材１０，２０の他端に嵌合されるオス型の嵌合筒部３ｔを備え、嵌合筒部３ｔとタケノコ部３ａとの境界付近の外周面からは大径のフランジ部４が延設されている。図２、３に示すように、ニップル部材３の内径は、タケノコ部３ａから嵌合筒部３ｂまで一貫して一定とされている。
嵌合筒部３ｂの一部には、１本の環状溝６が射出成形の完了後に切削などの後加工によって形成されており、この環状溝６にはゴムやエラストマ製のＯリングＲ１が係止されている。 (Configuration of nipple member)
As shown in FIG. 1-3, the nipple member 3 has a generally tubular shape with a linear axis, and a bamboo shoot portion 3a (nipple portion) for externally connecting the socket portion 1a of the reinforced gas hose 1; A connecting portion 3b that extends from the base end of the bamboo shoot portion 3a to the opposite side and connects the intermediate members 10 and 20 is provided. The connecting portion 3b includes a male fitting tube portion 3t fitted to the other end of each intermediate member 10, 20, and has a large diameter from the outer peripheral surface near the boundary between the fitting tube portion 3t and the bamboo shoot portion 3a. The flange portion 4 is extended. As shown in FIGS. 2 and 3, the inner diameter of the nipple member 3 is consistently constant from the bamboo shoot portion 3a to the fitting cylinder portion 3b.
One annular groove 6 is formed in a part of the fitting cylinder portion 3b by post-processing such as cutting after the completion of injection molding. The annular groove 6 is associated with an O-ring R1 made of rubber or elastomer. It has been stopped.

尚、図１に示すように、強化ガスホース１の端部１ａには金属製のソケット２が外嵌設置されている。強化ガスホース１をニップル部材３に取り付ける際には、ニップル部材３のタケノコ部３ａに強化ガスホース１の端部１ａを外嵌装着した後に、ソケット２を径方向内側に専用工具によるカシメなどで塑性変形させることで、強化ガスホース１の端部１ａがタケノコ部３ａに恒久的に接続される。 As shown in FIG. 1, a metal socket 2 is fitted on the end 1 a of the reinforced gas hose 1. When the reinforced gas hose 1 is attached to the nipple member 3, the end portion 1a of the reinforced gas hose 1 is fitted on the bamboo shoot portion 3a of the nipple member 3, and then the socket 2 is plastically deformed by caulking or the like with a special tool inside in the radial direction By doing so, the end part 1a of the reinforced gas hose 1 is permanently connected to the bamboo shoot part 3a.

フランジ部４の一方の面からは概して円筒状の係止筒部５が嵌合筒部３ｂと平行にニップル部材３の他端側に向かって延設されている。係止筒部５はその略全長にわたって複数（ここでは８つ）の切り欠きによって等分割されており、係止筒部５の分割された個々の部位は、係止機構３０の一部としての弾性係止片５ａを構成している。各弾性係止片５ａの先端には径方向外向きに延びた係止爪部５ｂが形成されている。
図２、３に示すように、係止筒部５はフランジ部４の径方向の中間部位から延設されているので、係止爪部５ｂに外力が働かない状態では、弾性係止片５ａと係止筒部５との間には、係止筒部５と平行に延びた間隙が存在する。したがって、係止爪部５ｂは径方向内側向きの外力により、弾性係止片５ａの弾性変形に基づいて、径方向内側に弾性変位可能となっている。 From one surface of the flange portion 4, a generally cylindrical locking tube portion 5 extends in parallel with the fitting tube portion 3 b toward the other end side of the nipple member 3. The locking cylinder portion 5 is equally divided by a plurality of (eight in this case) cutouts over substantially the entire length thereof, and each divided portion of the locking cylinder portion 5 serves as a part of the locking mechanism 30. The elastic locking piece 5a is constituted. A locking claw portion 5b extending radially outward is formed at the tip of each elastic locking piece 5a.
As shown in FIGS. 2 and 3, the locking cylinder portion 5 extends from the intermediate portion in the radial direction of the flange portion 4. Therefore, when no external force acts on the locking claw portion 5 b, the elastic locking piece 5 a. A gap extending in parallel with the locking cylinder portion 5 exists between the locking cylinder portion 5 and the locking cylinder portion 5. Therefore, the locking claw portion 5b can be elastically displaced radially inward based on the elastic deformation of the elastic locking piece 5a by an external force directed radially inward.

（オス型中間部材）
図１、２に示すように、オス型中間部材１０も、前述したメス型中間部材２０を含む種々の機器の雌ネジ部に螺合可能な雄ネジが切られた雄ネジ部１０ａと、ニップル部材３の連結部３ｂに連結される被連結部１０ｂとを備えている。雄ネジ部１０ａと被連結部１０ｂとは、互いの軸心を一致させて連続的に隣接し合うことで、全体として直線的に延びた概して管状を呈しているが、被連結部１０ｂの内径および外径は共に雄ネジ部１０ａに比して大きい。 (Male intermediate member)
As shown in FIGS. 1 and 2, the male intermediate member 10 also includes a male screw portion 10a in which a male screw that can be screwed into a female screw portion of various devices including the female intermediate member 20 described above, and a nipple. And a connected portion 10 b connected to the connecting portion 3 b of the member 3. The male threaded portion 10a and the connected portion 10b have a generally tubular shape that extends linearly as a whole by continuously adjoining each other with their axes aligned, but the inner diameter of the connected portion 10b The outer diameter is larger than that of the male screw portion 10a.

被連結部１０ｂは、ニップル部材３の嵌合筒部３ｂに外嵌されるメス型の被嵌合筒部１０ｔと、ニップル部材３の弾性係止片５ａを係止する係止筒部１０ｃとを備えている。被嵌合筒部１０ｔは雄ネジ部１０ａに隣接しており、係止筒部１０ｃは被嵌合筒部１０ｔの先端側から、さらに雄ネジ部１０ａと離間する方向に延設されている。
係止筒部１０ｃの内周面には、ニップル部材３の弾性係止片５ａの特に係止爪部５ｂのみを受け入れて係止する環状の係止溝部１０ｄが形成されている。
係止筒部１０ｃおよび係止溝部１０ｄはオス型中間部材１０の側の係止機構３０を構成する。 The coupled portion 10b includes a female-type fitted cylinder portion 10t that is externally fitted to the fitted cylinder portion 3b of the nipple member 3, and a locking cylinder portion 10c that locks the elastic locking piece 5a of the nipple member 3. It has. The to-be-fitted cylinder part 10t is adjacent to the male screw part 10a, and the locking cylinder part 10c is further extended from the front end side of the to-be-fitted cylinder part 10t in a direction away from the male screw part 10a.
An annular locking groove portion 10d that receives and locks only the locking claw portion 5b of the elastic locking piece 5a of the nipple member 3 is formed on the inner peripheral surface of the locking cylinder portion 10c.
The locking cylinder portion 10c and the locking groove portion 10d constitute a locking mechanism 30 on the male intermediate member 10 side.

（メス型中間部材）
図１、３に示すように、メス型中間部材２０は、前述したオス型中間部材１０を含む種々の機器の雌ネジ部に螺合可能な雌ネジが内面に切られた雌ネジ部２０ａと、ニップル部材３の連結部３ｂに連結される被連結部２０ｂとを備えている。雌ネジ部２０ａと被連結部２０ｂとは、互いの軸心を一致させて連続的に隣接し合うことで全体として直線的に延びた概して管状を呈している。 (Female intermediate member)
As shown in FIGS. 1 and 3, the female intermediate member 20 includes a female screw portion 20 a in which a female screw that can be screwed into a female screw portion of various devices including the male intermediate member 10 is cut. And a connected portion 20b connected to the connecting portion 3b of the nipple member 3. The female screw portion 20a and the connected portion 20b have a generally tubular shape that extends linearly as a whole by matching the axial centers thereof and continuously adjoining each other.

被連結部２０ｂは、ニップル部材３の嵌合筒部３ｂに外嵌されるメス型の被嵌合筒部２０ｔと、ニップル部材３の弾性係止片５ａを係止する係止筒部２０ｃとを備えている。被嵌合筒部２０ｔは、径方向内側に突出した環状小径部２０ｓを挟んで、雌ネジ部２０ａに隣接している。係止筒部２０ｃは被嵌合筒部２０ｔの先端側から、さらに雌ネジ部２０ａと離間する方向に延設されている。
係止筒部２０ｃの内周面には、ニップル部材３の弾性係止片５ａの特に係止爪部５ｂのみを受け入れて係止する環状の係止溝部２０ｄが形成されている。
係止筒部２０ｃおよび係止溝部２０ｄはメス型中間部材２０の側の係止機構３０を構成する。 The connected portion 20b includes a female-type fitting cylinder portion 20t that is externally fitted to the fitting cylinder portion 3b of the nipple member 3, and a locking cylinder portion 20c that locks the elastic locking piece 5a of the nipple member 3. It has. The fitted cylinder portion 20t is adjacent to the female screw portion 20a with an annular small diameter portion 20s protruding radially inward. The locking cylinder part 20c is further extended from the front end side of the fitted cylinder part 20t in a direction away from the female screw part 20a.
On the inner peripheral surface of the locking cylinder portion 20c, an annular locking groove portion 20d for receiving and locking only the locking claw portion 5b of the elastic locking piece 5a of the nipple member 3 is formed.
The locking cylinder portion 20c and the locking groove portion 20d constitute a locking mechanism 30 on the female intermediate member 20 side.

環状小径部２０ｓの一端側（雌ネジ部２０ａに隣接した側）の端面にはパッキンを係止させるための取り付け凹部２０Ｖが形成されており、この凹部２０Ｖには、ゴム製などのパッキン２１が取り付けられている。ガス機器（不図示）など接続対象物側の雄ネジを雌ネジ部２０ａに螺合させ、一定のトルクで締め付けると、同雄ネジの端面がこのパッキン２１に圧着されることで、継手内部の気密状態が得られる。 A mounting recess 20V for locking the packing is formed on one end side (side adjacent to the female threaded portion 20a) of the annular small diameter portion 20s, and a packing 21 made of rubber or the like is formed in the recess 20V. It is attached. When a male screw on a connection object side such as a gas appliance (not shown) is screwed into the female screw portion 20a and tightened with a constant torque, the end surface of the male screw is crimped to the packing 21 so that the inside of the joint is An airtight state is obtained.

（連結操作）
図４は、ニップル部材３とオス型中間部材１０の間の連結操作の手順を示している。ニップル部材３とメス型中間部材２０の間の連結操作の手順も基本的に同一である。
（１）第１段階：先ず、図４（ａ）に示すように、ニップル部材３の嵌合筒部３ｔとオス型中間部材１０の被嵌合筒部１０ｔとを、両部材の軸心が一致するように向き合わせる。ニップル部材３の弾性係止片５ａの先端は、未だオス型中間部材１０の他端側の端面、すなわち被連結部１０ｂの先端に当接されていないが、ニップル部材３の嵌合筒部３ｔは既にオス型中間部材１０の被係止筒部１０ｔの内部に僅かながら進入している。したがって、後続する近接操作において両部材の軸心どうしが再び離間する事態が避けられる。 (Concatenation operation)
FIG. 4 shows the procedure of the connecting operation between the nipple member 3 and the male intermediate member 10. The procedure of the connecting operation between the nipple member 3 and the female intermediate member 20 is basically the same.
(1) First stage: First, as shown in FIG. 4A, the fitting cylinder part 3t of the nipple member 3 and the fitting cylinder part 10t of the male intermediate member 10 are arranged so that the shaft centers of both members are the same. Face to match. The tip of the elastic locking piece 5a of the nipple member 3 is not yet in contact with the end surface on the other end side of the male intermediate member 10, that is, the tip of the connected portion 10b. Has already entered the locked cylinder portion 10t of the male intermediate member 10 slightly. Therefore, it is possible to avoid a situation where the shaft centers of both members are separated again in the subsequent approach operation.

（２）第２段階：更にニップル部材３とオス型中間部材１０とを近接させて行くと、先ず、ニップル部材３の弾性係止片５ａの先端がオス型中間部材１０の被連結部１０ｂの先端付近と当接する。弾性係止片５ａおよびオス型中間部材１０の被連結部１０ｂの各先端には、弾性係止片５ａの先端に径方向内側へ変位する外力を加える小さな案内傾斜面が形成されている。したがって、引き続く近接操作によって、弾性係止片５ａは、被連結部１０ｂの内周面から受ける外力によって内側に湾曲した形状に弾性変形され、次に、弾性係止片５ａの係止爪部５ｂが、被連結部１０ｂの内周面に沿って摺動しながら雄ネジ部１０ａに向かって進入する。さらに、ニップル部材３の嵌合筒部３ｂに外嵌されているＯリングＲ１も、オス型中間部材１０の被連結部１０ｂの内周面に圧着されたままで雄ネジ部１０ａに向かって摺動変位する。 (2) Second stage: When the nipple member 3 and the male intermediate member 10 are further brought closer to each other, first, the tip of the elastic locking piece 5a of the nipple member 3 is connected to the connected portion 10b of the male intermediate member 10. Abuts near the tip. A small guide inclined surface is formed at each tip of the elastic locking piece 5a and the connected portion 10b of the male intermediate member 10 to apply an external force that is displaced radially inward to the tip of the elastic locking piece 5a. Therefore, the elastic locking piece 5a is elastically deformed into an inwardly curved shape by an external force received from the inner peripheral surface of the connected portion 10b by the subsequent proximity operation, and then the locking claw portion 5b of the elastic locking piece 5a. However, it advances toward the external thread part 10a, sliding along the inner peripheral surface of the connected part 10b. Further, the O-ring R1 fitted on the fitting cylinder portion 3b of the nipple member 3 also slides toward the male screw portion 10a while being crimped to the inner peripheral surface of the coupled portion 10b of the male intermediate member 10. Displace.

（３）第３段階：更にニップル部材３とオス型中間部材１０とを近接させると、弾性係止片５ａの係止爪部５ｂが、オス型中間部材１０の係止溝部１０ｄに係入される。同係入によって、弾性係止片５ａに対する外力は失われるので、弾性係止片５ａは本来の直線状の形状を回復し、連結が完了する。 (3) Third stage: When the nipple member 3 and the male intermediate member 10 are further brought closer to each other, the locking claw portion 5b of the elastic locking piece 5a is engaged with the locking groove portion 10d of the male intermediate member 10. The Since the external force on the elastic locking piece 5a is lost by the engagement, the elastic locking piece 5a recovers its original linear shape and the connection is completed.

（連結状態）
係止爪部５ｂのタケノコ部３ａ側と対向する面、および、係止溝部１０ｄの雄ネジ部１０ａと対向する面はいずれも軸心Ｘ１，Ｘ２に対して垂直に延びているので、連結されたニップル部材３をオス型中間部材１０から引き離そうとする向きの外力が加えられても、弾性係止片５ａを再び内径側に変位させる応力は生じない。したがって、一旦連結されたニップル部材３とオス型中間部材１０とは基本的に連結解除不能となる。 (Linked state)
Since the surface facing the bamboo shoot portion 3a side of the locking claw portion 5b and the surface facing the male screw portion 10a of the locking groove portion 10d all extend perpendicular to the shaft centers X1 and X2, they are connected. Even if an external force is applied in such a direction as to pull the nipple member 3 away from the male intermediate member 10, no stress is generated to displace the elastic locking piece 5a to the inner diameter side again. Therefore, the nipple member 3 and the male intermediate member 10 which are once connected cannot basically be released.

また、連結が完了した状態では、ニップル部材３の嵌合筒部３ｂに外嵌されているＯリングＲ１がオス型中間部材１０の被連結部１０ｂの内周面に圧着されるので、ニップル部材３とオス型中間部材１０との間の連結部にも、継手の内外を隔て、ガスの漏れを防ぐ気密状態が得られる。 Further, in the state where the connection is completed, the O-ring R1 that is externally fitted to the fitting cylinder portion 3b of the nipple member 3 is pressure-bonded to the inner peripheral surface of the connected portion 10b of the male intermediate member 10, so that the nipple member The airtight state which prevents the leakage of gas is also obtained in the connection part between 3 and the male intermediate member 10 by separating the inside and outside of the joint.

さらに、弾性係止片５ａの係止爪部５ｂは、環状に連続的に延びた係止溝部１０ｄ，２０ｄの中を周方向に自在に移動できるので、連結完了した状態でも、中間部材１０，２０はニップル部材３に対して回転自在の状態が得られる。したがって、強化ガスホース１が接続されたニップル部材３との連結が完了した状態で中間部材１０，２０を回転させて機器に接続しようとする際に、ニップル部材３が供回りし難くなるため、強化ホース１に捩れなどが生じ難い。
ニップル部材３とオス型中間部材１０の連結状態について述べた以上の記載はニップル部材３とメス型中間部材２０との連結状態にも当てはまる。 Further, since the locking claw portion 5b of the elastic locking piece 5a can freely move in the circumferential direction in the locking groove portions 10d and 20d continuously extending in an annular shape, the intermediate member 10, 20 can be rotated with respect to the nipple member 3. Therefore, when the intermediate members 10 and 20 are rotated to be connected to the apparatus in a state where the connection with the nipple member 3 to which the reinforced gas hose 1 is connected is completed, the nipple member 3 is difficult to be rotated. The hose 1 is not easily twisted.
The above description of the connection state between the nipple member 3 and the male intermediate member 10 also applies to the connection state between the nipple member 3 and the female intermediate member 20.

図２に示すように、オス型中間部材１０の被嵌合筒部１０ｂの外径および内径は、雄ネジ部１０ａの外径および内径よりも大きく形成されているため、軸心方向の中間部には、外面と内面の双方に段差が形成され、特に内面には雄ネジ部１０ａの基端付近に、前記他端側の開放端と対向する中間端面１０Ｍが形成されている。しかし、ニップル部材３との連結が完了した状態では、ニップル部材３の嵌合筒部３ｂが中間端面１０Ｍと隣接し、前記段差を埋めるように配置されるため、ニップル部材３とオス型中間部材１０とで作られた継手ユニットの内面は段差が小さく比較的円滑に延びたものとなっており、適切なガス流量が確保できる。 As shown in FIG. 2, the outer diameter and the inner diameter of the fitted cylindrical portion 10b of the male intermediate member 10 are formed larger than the outer diameter and the inner diameter of the male screw portion 10a. Are formed with steps on both the outer surface and the inner surface, and in particular, on the inner surface, an intermediate end surface 10M facing the open end on the other end side is formed near the base end of the male screw portion 10a. However, when the connection with the nipple member 3 is completed, the fitting cylinder portion 3b of the nipple member 3 is disposed adjacent to the intermediate end face 10M and fills the step, so that the nipple member 3 and the male intermediate member are arranged. The inner surface of the joint unit made of 10 has a small step and is relatively smoothly extended, and an appropriate gas flow rate can be secured.

メス型中間部材２０についても同様に、ニップル部材３との連結が完了した状態では、ニップル部材３の嵌合筒部３ｂがメス型中間部材２０の環状小径部２０ｓの中間端面２０Ｍと軸心に沿って並置され、環状小径部２０ｓが形成している一方の段差を略全面的に埋めるように配置されるため、ニップル部材３とメス型中間部材２０とで作られた継手ユニットの内面も除けば段差が無く非常に円滑に延びたものとなっており、適切なガス流量が確保できる。 Similarly, in the state where the connection with the nipple member 3 is completed for the female intermediate member 20, the fitting cylinder portion 3 b of the nipple member 3 is positioned on the center end surface 20 M of the annular small diameter portion 20 s of the female intermediate member 20. And the inner surface of the joint unit made up of the nipple member 3 and the female intermediate member 20 is also excluded because it is arranged so as to fill the entire surface of one step formed by the annular small-diameter portion 20s. In this case, there is no level difference and the flow is very smooth, and an appropriate gas flow rate can be secured.

連結が完了した状態では、ニップル部材３を中間部材１０，２０に対して軸心方向と垂直にずらす方向の外力は、主に、ニップル部材３の嵌合筒部３ｂと、中間部材１０，２０の被嵌合筒部１０ｂ，２０ｂとの間の嵌合によって受けられる。他方、ニップル部材３と中間部材１０，２０との軸心どうしを相対的に傾斜させる方向の外力は、主に、ニップル部材３のフランジ部４が、中間部材１０，２０の被連結部１０ｂ，２０ｂの端面と当接することによって受けられる。 In the state where the connection is completed, the external force in the direction of shifting the nipple member 3 with respect to the intermediate members 10 and 20 perpendicularly to the axial direction is mainly the fitting cylinder portion 3b of the nipple member 3 and the intermediate members 10 and 20. Is received by fitting between the fitted cylinder portions 10b and 20b. On the other hand, the external force in the direction in which the axial centers of the nipple member 3 and the intermediate members 10 and 20 are relatively inclined mainly causes the flange portion 4 of the nipple member 3 to be connected to the connected portions 10b and 10b of the intermediate members 10 and 20, respectively. It is received by contacting the end face of 20b.

そのために、連結が完了した状態で、ニップル部材３のフランジ部４と中間部材１０，２０の被連結部１０ｂ，２０ｂの端面との間には間隙が殆ど無いか、又は、図２、３に示すように非常に小さい間隙Ｓ１となっている。
他方、係止爪部５ｂの先端と係止溝部１０ｄ，２０ｄの開放端側の端面との間には間隙Ｓ１よりも大きな間隙Ｓ２が形成されている。
同様に、ニップル部材３の嵌合筒部３ｔの先端と、中間部材１０，２０の中間端面１０Ｍ，２０Ｍとの間にも間隙Ｓ１よりも大きな間隙Ｓ３が形成されている。
前述したように、一旦連結されたニップル部材３と中間部材１０，２０とは基本的に連結解除不能となる。 Therefore, there is almost no gap between the flange portion 4 of the nipple member 3 and the end faces of the connected portions 10b and 20b of the intermediate members 10 and 20 in a state where the connection is completed, or in FIGS. As shown, the gap S1 is very small.
On the other hand, a gap S2 larger than the gap S1 is formed between the tip of the locking claw 5b and the end face on the open end side of the locking grooves 10d and 20d.
Similarly, a gap S3 larger than the gap S1 is also formed between the tip of the fitting cylinder portion 3t of the nipple member 3 and the intermediate end faces 10M and 20M of the intermediate members 10 and 20.
As described above, the nipple member 3 and the intermediate members 10 and 20 that are once connected are basically unreleasable.

（樹脂材料）
ニップル部材３は好適な弾性を保有すべき弾性係止片５ａを含むので、ニップル部材３には高靭性の、言い換えれば降伏歪みの大きな樹脂が用いられている。但し、強化ガスホース１の端部１ａをニップル部材３のタケノコ部３ａに接続する際には、端部１ａに外嵌された金属製のソケット２を専用工具によるカシメなどで径方向内側に塑性変形させるので、ニップル部材３はこの専用工具からの圧力に十分に耐え得る強度を備えている必要がある。
他方、中間部材１０，２０は一般に鉄などの金属で構成された機器側のネジと比較的大きな締め付け力で螺合されるので、中間部材１０，２０には高強度のすなわち降伏歪みの小さな樹脂が用いられている。
具体的な材料の一例としては、ニップル部材３には曲げ弾性率として２×１０³〜５×１０³ＭＰａを示す材料、例えばＰＯＭ樹脂、または、ガラス繊維なしのＰＰＳ樹脂が好適に適用でき、中間部材１０，２０には曲げ弾性率として７×１０³〜２×１０⁴ＭＰａを示す材料、例えばガラス繊維強化ＰＰＳ樹脂などが好適に適用可能である。 (Resin material)
Since the nipple member 3 includes an elastic locking piece 5a that should have suitable elasticity, the nipple member 3 is made of a resin having high toughness, in other words, a large yield strain. However, when the end portion 1a of the reinforced gas hose 1 is connected to the bamboo shoot portion 3a of the nipple member 3, the metal socket 2 externally fitted to the end portion 1a is plastically deformed radially inward by caulking or the like with a dedicated tool. Therefore, the nipple member 3 needs to have a strength that can sufficiently withstand the pressure from the dedicated tool.
On the other hand, since the intermediate members 10 and 20 are generally screwed together with a device-side screw made of a metal such as iron with a relatively large tightening force, the intermediate members 10 and 20 have a high strength, that is, a resin with a low yield strain. Is used.
As an example of a specific material, a material having a flexural modulus of 2 × 10 ^{3 to} 5 × 10 ³ MPa, for example, a POM resin or a PPS resin without glass fiber can be suitably applied to the nipple member 3. A material exhibiting a flexural modulus of 7 × 10 ³ to 2 × 10 ⁴ MPa, such as a glass fiber reinforced PPS resin, can be suitably applied to the intermediate members 10 and 20.

〔別実施形態〕
〈１〉図５に例示するように、ニップル部材３と中間部材１０，２０との間に、互いに軸心が直行（交差の一例）した一対の端部を備えたエルボ状の補助連結部材４０を連結させることが可能である。補助連結部材４０の一端には中間部材１０，２０の被連結部１０ｂ（または２０ｂ）と同一形状の被連結部４０ａ（係止溝部１０ｄ，２０ｄなど）が形成されているので、ここに前述したニップル部材３の連結部３ｂを回転可能に連結可能である。また、補助連結部材４０の他端には、ニップル部材３の連結部３ｂ（弾性係止片５ａなど）と同一形状の連結部４０ｂが形成されているので、ここに前述した中間部材１０，２０のいずれかを回転可能に連結可能である。このようなエルボ状の補助連結部材４０をニップル部材３と中間部材１０，２０との間に連結させると、ニップル部材３に接続された強化ガスホース１を、ガス機器などの接続部の軸心に対して直行する任意の方向に回転自在に延設させることが可能となる。 [Another embodiment]
<1> As illustrated in FIG. 5, an elbow-shaped auxiliary connecting member 40 having a pair of end portions whose axial centers are orthogonal (an example of crossing) between the nipple member 3 and the intermediate members 10 and 20. Can be linked. Since one end of the auxiliary connecting member 40 is formed with a connected portion 40a (such as the locking groove portions 10d and 20d) having the same shape as the connected portion 10b (or 20b) of the intermediate members 10 and 20, as described above. The connecting portion 3b of the nipple member 3 can be rotatably connected. Further, since the connecting portion 40b having the same shape as the connecting portion 3b (such as the elastic locking piece 5a) of the nipple member 3 is formed at the other end of the auxiliary connecting member 40, the intermediate members 10 and 20 described above are formed here. Any of these can be connected rotatably. When such an elbow-shaped auxiliary connecting member 40 is connected between the nipple member 3 and the intermediate members 10 and 20, the reinforced gas hose 1 connected to the nipple member 3 is used as an axial center of a connecting portion such as a gas appliance. On the other hand, it is possible to extend freely in an arbitrary direction perpendicular to the direction.

〈２〉図１−４に示す実施形態とは逆に、図１−４に示す実施形態ではニップル部材３に設けられている弾性係止片５ａとほぼ同一形態の連結部を中間部材１０，２０の被嵌合筒部１０ｔ，２０ｔの開放側端部に設け、図１−４に示す実施形態では中間部材１０，２０に設けられている係止溝部１０ｄ，２０ｄとほぼ同一形態の被連結部を、ニップル部材３のフランジ部４から嵌合筒部３ｔに沿って延設した形態を変形例として実施することも可能である。 <2> Contrary to the embodiment shown in FIGS. 1-4, in the embodiment shown in FIGS. 1-4, the intermediate member 10 is connected to the connecting portion having substantially the same shape as the elastic locking piece 5a provided in the nipple member 3. 20 at the open end of the 20 to-be-fitted cylinders 10t, 20t, and in the embodiment shown in FIGS. 1-4, the to-be-connected with substantially the same form as the locking grooves 10d, 20d provided on the intermediate members 10, 20 It is also possible to implement a form in which the portion extends from the flange portion 4 of the nipple member 3 along the fitting cylinder portion 3t as a modified example.

〈３〉或いは、図１−４に示す実施形態とは逆に、図１−４に示す実施形態では中間部材１０，２０に設けられている被嵌合筒部１０ｔ，２０ｔとほぼ同一形状のメス型の被嵌合筒部をニップル部材３の嵌合筒部の代わりに設け、同時に、ニップル部材３の嵌合筒部３ｔと同一形状のオス型の嵌合筒部を中間部材１０，２０の被嵌合筒部の代わりに設け、さらに、図１−４に示す実施形態ではニップル部材３に設けられている弾性係止片５ａとほぼ同一形態の連結部を、その中間部材１０，２０の嵌合筒部とネジ部との境界付近に設けたフランジ部から嵌合筒部の開放側端部に向けて延設した形態を変形例として実施することも可能である。 <3> Or, contrary to the embodiment shown in FIGS. 1-4, the embodiment shown in FIGS. 1-4 has substantially the same shape as the fitted tube portions 10t, 20t provided in the intermediate members 10, 20. A female-type fitting cylinder part is provided instead of the fitting cylinder part of the nipple member 3, and at the same time, male fitting cylinder parts having the same shape as the fitting cylinder part 3t of the nipple member 3 are provided as intermediate members 10 and 20. In addition, in the embodiment shown in FIGS. 1 to 4, in the embodiment shown in FIG. 1-4, a connecting portion having substantially the same form as the elastic locking piece 5 a provided in the nipple member 3 is provided. It is also possible to implement a form in which a flange portion provided near the boundary between the fitting tube portion and the screw portion is extended toward the open end portion of the fitting tube portion as a modified example.

〈４〉本発明によるホース継手はガスホース用に限らず、水などの液体を供給するためのホースにも適用できる。 <4> The hose joint according to the present invention is not limited to a gas hose but can be applied to a hose for supplying a liquid such as water.

ホースを接合可能な一端を備えたニップル部材と、機器側に接合可能な一端を備えた中間部材とを備え、ニップル部材と中間部材の間に、両部材の他端どうしを軸心周りで回転可能に連結可能な係止機構が設けられているホース継手において、これらニップル部材と中間部材とを合理的な形で樹脂製とするための技術として利用できる。 It has a nipple member with one end that can join the hose and an intermediate member with one end that can be joined to the equipment side. Between the nipple member and the intermediate member, the other ends of both members rotate around the axis. In a hose joint provided with a locking mechanism that can be connected, the nipple member and the intermediate member can be used as a technique for making the resin in a reasonable form.

３ニップル部材（ホース継手）
３ａタケノコ部
３ｂ連結部
３ｔ嵌合筒部
４フランジ部
５係止筒部
５ａ弾性係止片（係止機構）
５ｂ係止爪部（係止機構）
１０オス型中間部材（ホース継手）
１０ａ雄ネジ部
１０ｂ被連結部
１０ｃ係止筒部
１０ｄ係止溝部
１０ｔ被嵌合筒部
２０メス型中間部材（ホース継手）
２０ａ雌ネジ部
２０ｂ被連結部
２０ｃ係止筒部
２０ｄ係止溝部
２０ｓ環状小径部
２０ｔ被嵌合筒部
３０係止機構取り付け部
４０補助連結部材 3 Nipple member (hose joint)
3a Bamboo shoot part 3b Connecting part 3t Fitting cylinder part 4 Flange part 5 Locking cylinder part 5a Elastic locking piece (locking mechanism)
5b Locking claw (locking mechanism)
10 Male intermediate member (hose joint)
10a Male thread portion 10b Connected portion 10c Locking tube portion 10d Locking groove portion 10t Fit-in tube portion 20 Female intermediate member (hose joint)
20a Female thread part 20b Connected part 20c Locking cylinder part 20d Locking groove part 20s Annular small diameter part 20t Fitd cylinder part 30 Locking mechanism attachment part 40 Auxiliary connection member

Claims

A nipple member having one end to which a hose can be joined;
An intermediate member having one end that can be joined to the device side;
Between the nipple member and the intermediate member, a hose coupling provided with a locking mechanism capable of connecting the other ends of both members so as to be rotatable around an axis,
Both the members are made of resin, and the locking mechanism is connected to an elastic locking piece formed on one outer peripheral portion of the both members, and the elastic locking piece is engaged during the connection. A hose joint comprising a locked groove formed in the other of the two members so as to be stopped.

The intermediate member includes a male intermediate member having a male screw or a female intermediate member having a female screw, and the male intermediate member and the female intermediate member both engage with the nipple member having the same shape. The hose coupling according to claim 1, wherein the hose coupling has a possible locking mechanism.

The one of the two members is provided with a flange portion that can contact the other of the two members in the axial direction when the connection is completed, and the elastic locking piece extends from the flange portion. The hose coupling according to claim 1 or 2, wherein the hose coupling is formed.

The locking mechanism is a male fitting cylinder provided at the other end of the nipple member and a female fitting provided at the other end of the intermediate member and engageable with the fitting cylinder. The hose coupling according to any one of claims 1 to 3, further comprising a fitted cylinder portion.

The intermediate member is a female intermediate member provided with a female screw, and the female intermediate member includes an annular small-diameter portion that protrudes radially inward between the one end and the other end. The end surface of the one end side is provided with an attachment portion for a seal member that can be crimped to an end surface of a male screw portion screwed into the female screw of the female intermediate member. The hose coupling according to any one of 1 to 4.

Between the nipple member and the intermediate member, an elbow-shaped auxiliary member having one end and the other end whose axis intersects each other can be connected, and the one end of the auxiliary member is connected to the locking member. The other end of the nipple member can be connected to the other end of the nipple member so as to be rotatable around the axis, and the other end of the auxiliary member can be rotated about the other end of the intermediate member around the axis by the locking mechanism. The hose joint according to any one of claims 1 to 5, wherein the hose joint can be connected to the hose.

The elastic locking piece is provided on the nipple member, and a resin material having a larger yield strain than that of the resin material constituting the intermediate member is used as the resin material constituting the nipple member. The hose coupling according to any one of claims 1 to 6.