JP5471235B2

JP5471235B2 - Pipe joint structure

Info

Publication number: JP5471235B2
Application number: JP2009220177A
Authority: JP
Inventors: 章二井ノ口; 恭司森
Original assignee: Toto Ltd
Current assignee: Toto Ltd
Priority date: 2009-09-25
Filing date: 2009-09-25
Publication date: 2014-04-16
Anticipated expiration: 2029-09-25
Also published as: JP2011069423A

Description

本発明は、流体用の管継手構造に関するものである。 The present invention relates to a pipe joint structure for fluid.

従来、湯水を吐出する水栓と、給水配管及び給湯配管に設けられた止水栓とをフレキシブルホースを介して接続するために用いられる管継手があり、かかる管継手において、極めて簡単に結合・離脱を行うことのできる、所謂「ワンタッチカプラー式」の管継手が知られている。 Conventionally, there has been a pipe joint used to connect a faucet that discharges hot water and a water stop cock provided in a water supply pipe and a hot water supply pipe via a flexible hose. A so-called “one-touch coupler type” pipe joint that can be detached is known.

例えば、内周にシール材嵌め込み用周溝を形成した雌体と、雄プラグ外周の環状溝に嵌まるロック部材を支持するソケットおよびスリーブと、スリーブを付勢するバネ材と、スリーブとバネ材を覆う外筒とを設け、雌体とソケットとバネ材とスリーブとを順に直列に配置し、外筒にバネ材の収縮時および雄プラグの離脱時にロック部材の移動空間を設けることで雄プラグの結合および離脱を可能としたものがあった（例えば、特許文献１を参照。）。 For example, a female body in which a circumferential groove for fitting a seal material is formed on the inner periphery, a socket and a sleeve that support a lock member that fits in an annular groove on the outer periphery of the male plug, a spring material that biases the sleeve, and a sleeve and a spring material A male plug is provided by arranging a female body, a socket, a spring material and a sleeve in series in order, and providing a moving space for the lock member when the spring material is contracted and when the male plug is detached. There was one that made it possible to bind and detach (see, for example, Patent Document 1).

特開２００２−２９５７６７号公報JP 2002-295767 A

しかし、水栓と止水栓とを接続するフレキシブルホースの長さは一定ではなく、水栓と止水栓との位置関係も様々である。そのため、上述したワンタッチカプラー式の管継手を用いた場合において、例えば、短めのフレキシブルホースを強く曲げての管継手の本体部の接続孔に差し込まねばならない場合などには、ホースに大きな反力が発生し、ホース先端のニップルが接続孔の内周面に強く当接した状態となって差し込み時及び引き抜き時の抵抗が大きくなる。 However, the length of the flexible hose connecting the faucet and the stop cock is not constant, and the positional relationship between the faucet and the stop cock is various. Therefore, when the one-touch coupler type pipe joint described above is used, for example, when a short flexible hose must be bent strongly and inserted into the connection hole of the pipe joint main body, a large reaction force is applied to the hose. Occurs, the nipple at the tip of the hose is in a state of being in strong contact with the inner peripheral surface of the connection hole, and resistance during insertion and withdrawal increases.

その場合、ロック未完了であるにも拘わらず、シール部材によるシール機能が生起されてしまうことがあり、そのまま使用されてしまう場合があった。このようなロック未完了のままで使用されると、しばらくは問題なく使用できたとしても、ある日突然に噴水のような漏水が発生する虞がある。 In that case, the seal function by the seal member may be caused even though the lock has not been completed, and it may be used as it is. If it is used in such a state that the lock is not completed, there is a possibility that water leakage such as a fountain may occur suddenly even if it can be used without any problem for a while.

特に、流し台のシンク下などのような狭い空間でフレキシブルホースの接続作業を行う場合、不自然な姿勢とならざるを得ないため、手による差し込み力が十分に加えられず、ロック未完了になってしまう危険性が大きい。 Especially when connecting the flexible hose in a narrow space such as under the sink of the sink, it must be in an unnatural posture, so the insertion force by hand is not fully applied and the lock is not completed. There is a great risk that

そこで、本発明では、流体用の管部材を確実に連結することができ、しかも、連結されていることを容易に確認することのできる管継手構造を提供することを目的としている。 Therefore, an object of the present invention is to provide a pipe joint structure that can reliably connect the pipe members for fluid and can easily confirm that the pipe members are connected.

（１）本発明では、先端開口側からシール面とシール面の外径よりも大きい外径を有する雄ネジ部が順次形成された内側に流体が通過するホースと、このホースの前記雄ネジ部と螺合可能なナット部材と、このナット部材を回転自在、かつ脱落しない状態で装着しており、前記ホースの先端部を前記ナット部材を介して挿入可能な挿入口が形成された管継手本体と、前記ホース先端側外周面又は前記管継手本体の前記挿入口内周面に配設され前記ホースの前記シール面と前記管継手本体の前記挿入口内周面とをシールする軸シール材と、を備え、前記ホースの先端を前記挿入口に挿入させたホース仮嵌装の状態で前記ナット部材を回転させ、このナット部材の雌ネジ部と前記ホースの雄ネジ部とを螺合させることにより、前記軸シール材を介した状態で前記ホースと前記管継手本体とが接続されている管継手構造とした。 (1) In the present invention, a hose through which a fluid passes through an inner side in which a male screw part having an outer diameter larger than the outer diameter of the sealing surface and the sealing surface is sequentially formed from the tip opening side, and the male screw part of the hose A pipe fitting body in which a nut member that can be screwed together and the nut member is mounted in a rotatable and non-dropping state, and an insertion port is formed through which the tip of the hose can be inserted via the nut member And a shaft seal member that is disposed on the outer peripheral surface of the hose tip side or the inner peripheral surface of the insertion port of the pipe joint body and seals the sealing surface of the hose and the inner peripheral surface of the insertion port of the pipe joint body , Provided, by rotating the nut member in a hose temporary fitting state in which the tip of the hose is inserted into the insertion port, and screwing the female screw portion of the nut member and the male screw portion of the hose, Through the shaft seal material It said pipe joint body and said hose is a pipe joint structure being connected in a state.

（２）また、本発明は、上記（１）に記載の管継手構造において、前記軸シール材は、前記ホース先端側又は前記管継手本体の挿入口側であって、前記ホース仮嵌装の状態ではシール機能が発揮できない位置に設けられていることを特徴とする。 (2) Moreover, this invention is a pipe joint structure as described in said (1), The said shaft sealing material is the insertion port side of the said hose front end side or the said pipe joint main body, Comprising: It is characterized by being provided at a position where the sealing function cannot be exhibited in the state.

（３）また、本発明は、上記（１）又は（２）に記載の管継手構造において、前記ナット部材の開口始端と前記雌ネジ部の始端との間に、前記ホースの前記雄ネジ部の外径よりも大径のガイド部を形成し、このガイド部により、前記ホースが当該ナット部材及び前記管継手本体の挿入口と同軸となるように、前記ホース仮嵌装の状態におけるホース姿勢を規制可能としたことを特徴とする。 (3) Further, in the pipe joint structure according to the above (1) or (2), the present invention provides the male screw portion of the hose between the opening start end of the nut member and the start end of the female screw portion. A guide portion having a diameter larger than the outer diameter of the hose, and the guide portion allows the hose to be coaxial with the insertion port of the nut member and the pipe joint body. It is characterized in that it can be regulated.

（４）また、本発明は、上記（１）〜（３）のいずれかに記載の管継手構造において、前記ホースには環状弾性部材が取付けられており、当該環状弾性部材の取付位置を、前記ナット部材の雌ネジ部と前記ホースの雄ネジ部とを螺合させて行き、前記ホースと前記管継手本体との接続が完了したときに前記ナット部材の開口始端と面一状態となる位置、あるいは当該開口始端から潜り込んだ位置としたことを特徴とする。 (4) Moreover, the present invention provides the pipe joint structure according to any one of (1) to (3) above, wherein an annular elastic member is attached to the hose, and the attachment position of the annular elastic member is A position where the female threaded portion of the nut member and the male threaded portion of the hose are screwed together, and when the connection between the hose and the pipe joint body is completed, the opening of the nut member is flush with the opening start end. Alternatively, it is characterized in that it is a position that has entered from the opening start end.

（５）また、本発明は、上記（１）〜（４）のいずれかに記載の管継手構造において、前記ホースの先端部外周面と前記管継手本体の挿入口との間に、それぞれ互いに嵌合する異形部を形成したことを特徴とする。 (5) Moreover, in the pipe joint structure according to any one of the above (1) to (4), the present invention provides each other between the tip outer peripheral surface of the hose and the insertion port of the pipe joint body. It is characterized in that a deformed portion to be fitted is formed.

（６）また、本発明は、上記（１）〜（５）のいずれかに記載の管継手構造において、前記ナット部材と前記ホースとの螺合が完了して、前記管継手本体と前記ホースとが接続完了したときにのみ作用する弛み防止機構を備え、この弛み防止機構は、前記ホースの先端部分の外周面に形成された溝部及び多角形の面と、前記ナット部材に形成された雌ネジ部と前記ホースに形成された雄ネジ部とが螺合し、前記ナット部材の回転が停止する位置でのみ前記溝部と嵌合する爪部と、前記多角形の面を回転しないよう規制する立面部と、前記爪部と前記立面部の収縮、拡開を行う弾性平面部と、前記弾性平面部に設けられた支点部とを有するプレート部材と、このプレート部材を保持するとともに、当該プレート部材の外周端面に当接するカム部が形成され、かつ前記ナット部材と係合して当該ナット部材周りに回転可能としたホルダー部材と、前記ナット部材に設けられ、前記プレート部材の支点部と嵌合する凹部又は凸部と、を備え、前記ナット部材に形成された雌ネジ部と前記ホースに形成された雄ネジ部とが螺合完了したときに前記ホルダー部材を回転させると、前記カム部により前記プレート部材の爪部並びに立面部を軸中心方向へ収縮させる一方、前記雄ネジ部と雌ネジ部との螺合を解除するときに逆回転させると、前記カム部により前記プレート部材の爪部並びに立面部を拡開させて当該爪部と前記溝部との嵌合を解除するとともに、前記多角形の面の回転規制についても解除することを特徴とする。 (6) Moreover, the present invention provides the pipe joint structure according to any one of (1) to (5), wherein the nut member and the hose are screwed together, and the pipe joint body and the hose. And a slack preventing mechanism that acts only when the connection is completed. The slack preventing mechanism includes a groove and a polygonal surface formed on the outer peripheral surface of the tip portion of the hose, and a female formed on the nut member. The screw part and the male screw part formed on the hose are screwed together, and the claw part that fits into the groove part only at the position where the rotation of the nut member stops, and the polygonal surface is restricted from rotating. While holding the plate member, a plate member having an elevation surface portion, an elastic plane portion that contracts and expands the claw portion and the elevation surface portion, and a fulcrum portion provided on the elastic plane portion, Cam portion that contacts the outer peripheral end surface of the plate member A holder member formed and engaged with the nut member so as to be rotatable around the nut member; and a concave portion or a convex portion provided on the nut member and fitted to a fulcrum portion of the plate member. When the holder member is rotated when the female screw portion formed on the nut member and the male screw portion formed on the hose are completely screwed together, the cam portion causes the claw portion and the elevation surface of the plate member to be rotated. When the screw portion is contracted in the axial center direction and is reversely rotated when releasing the screwing of the male screw portion and the female screw portion, the claw portion and the elevation portion of the plate member are expanded by the cam portion. Thus, the fitting between the claw portion and the groove portion is released, and the rotation restriction of the polygonal surface is also released.

第１の発明によれば、ホースの先端を前記挿入口に挿入させたホース仮嵌装の状態で前記ナット部材を回転させ、このナット部材の雌ネジ部と前記ホースの雄ネジ部とを螺合させることにより、軸シール材を介した状態でホースと継手本体とが接続された構造となっているため、ホースを差込んでロックに至るまでの間、ホースを保持する作業者の握力と差込みの力を、螺合による強力な推進力でアシストすることができ、例えばフレキシブルホースに反力が生じても、その反力の影響を低減して、小さな力で接続することが可能となる。このように、作業者が自身の手でナット部材を回転させて接続するので、ホースを継手本体の挿入孔に仮嵌装した状態、すなわち、ロック未完了の状態で接続を完了することがない。しかも、ナット部材の締め付けを容易にできる。さらに、ナット部材の締め付けが不完全の場合でも、シール力は一定であり、軸シール材の応力緩和による漏水が発生することもない。 According to the first aspect of the present invention, the nut member is rotated with the hose temporarily fitted with the tip of the hose inserted into the insertion port, and the female screw portion of the nut member and the male screw portion of the hose are screwed. Since the hose and the joint body are connected via the shaft seal material, the gripping force of the operator holding the hose until the lock is reached after the hose is inserted. The insertion force can be assisted by a strong propulsive force by screwing. For example, even if a reaction force is generated in the flexible hose, the influence of the reaction force can be reduced and the connection can be made with a small force. . Thus, since the operator rotates the nut member with his / her hand to connect, the connection is not completed in a state in which the hose is temporarily fitted in the insertion hole of the joint body, that is, in an incomplete lock state. . In addition, the nut member can be easily tightened. Furthermore, even when the nut member is not completely tightened, the sealing force is constant, and water leakage due to stress relaxation of the shaft seal material does not occur.

また、第２の発明によれば、軸シール材は、ホース仮嵌装の状態ではシール機能が発揮できない位置に設けられているため、ホースの雄ネジ部がナット部材に形成された雌ネジ部と螺合し始めて軸シール材が機能することになる。したがって、この時点で通水された場合は継手本体から漏水するため、漏水の有無によって接続状態を確認する竣工前の耐圧検査などにおいて、ロック未完了の不具合を容易に発見することが可能となる。 According to the second invention, since the shaft seal member is provided at a position where the sealing function cannot be exhibited in the state of temporarily fitting the hose, the female screw portion in which the male screw portion of the hose is formed on the nut member. And the shaft seal material will function. Therefore, if water is passed at this point, water will leak from the joint body, so it will be possible to easily find incomplete malfunctions in the pressure test before completion to check the connection status based on the presence or absence of water leakage. .

また、第３の発明によれば、ガイド部によって、ホースがナット部材及び管継手本体の挿入口と同軸となるように、ホース仮嵌装の状態におけるホース姿勢を規制可能としているため、ホースを差込んだときにはホースの雄ネジ部とナット部材の雌ネジ部とが円滑に螺合でき、しかも、ホース先端部をガイド部と継手本体の挿通孔の２個所で保持することになるため、螺合時の抵抗を減じてホースと継手本体との接続が楽に行えるようになる。 Further, according to the third invention, the guide portion can regulate the hose posture in the state of temporary hose fitting so that the hose is coaxial with the insertion port of the nut member and the pipe joint body. When inserted, the hose male threaded portion and the nut member female threaded portion can be smoothly screwed together, and the hose tip is held at two places, the guide portion and the fitting body insertion hole. The hose and the joint body can be connected easily by reducing the resistance at the time.

また、第４の発明によれば、ホースに取付けられた環状弾性部材による摩擦力でホースの抜け防止になるとともに、環状弾性部材が見えなくなったところが接続完了の位置となるため、接続が完了したことを目視により容易に確認することができる。 According to the fourth invention, the hose is prevented from being pulled out by the frictional force of the annular elastic member attached to the hose, and the connection is completed because the position where the annular elastic member is not visible becomes the connection completion position. This can be easily confirmed visually.

また、第５の発明によれば、例えばローレットやスプライン加工などの異形部によって、ナット部材による螺合作業の際にもホースが捩じれたりすることがないため、継手本体とホースとの接続作業の作業性を向上させることができる。 Further, according to the fifth invention, since the hose is not twisted even when the nut member is screwed by a deformed portion such as knurling or spline processing, for example, the connection work between the joint body and the hose Workability can be improved.

さらに、第６の発明によれば、ナット部材とホースとの螺合が完了して、継手本体とホースとが接続完了したときにのみ作用する弛み防止機構により、継手本体とホースとが接続完了した後は、ホースは外れることがなく安全性が高まる。しかも、ナット部材とホースとの螺合が完了しない状態では、ホースの先端部分の外周面に形成された溝部にはプレート部材の爪部が嵌合しないため、ホース接続が未完了であることを容易に認識することができる。さらに、多角形の面でナット部材とホースとの相対運動を停止させることにより、ネジ部による摩擦によらずにネジ弛み防止が可能となる。 Further, according to the sixth invention, the connection between the joint body and the hose is completed by the loosening prevention mechanism which acts only when the screw connection between the nut member and the hose is completed and the connection between the joint body and the hose is completed. After that, the hose does not come off and safety is improved. In addition, in a state where the screwing of the nut member and the hose is not completed, the claw portion of the plate member does not fit in the groove formed on the outer peripheral surface of the tip portion of the hose, so that the hose connection is not completed. It can be easily recognized. Further, by stopping the relative movement between the nut member and the hose on the polygonal surface, it is possible to prevent screw loosening regardless of friction caused by the screw portion.

本発明の１実施形態に係る管継手構造を備えた水栓の説明図である。It is explanatory drawing of the faucet provided with the pipe joint structure concerning one embodiment of the present invention. 同管継手構造の断面視による説明図である。It is explanatory drawing by the cross sectional view of the pipe joint structure. 同管継手構造におけるガイド部の説明図である。It is explanatory drawing of the guide part in the pipe joint structure. 同管継手構造におけるホースの連結手順を示す説明図である。It is explanatory drawing which shows the connection procedure of the hose in the pipe joint structure. 本発明の変形例に係る管継手構造を示す説明図である。It is explanatory drawing which shows the pipe joint structure which concerns on the modification of this invention. 本発明の他の実施形態に係る管継手構造を示す説明図である。It is explanatory drawing which shows the pipe joint structure which concerns on other embodiment of this invention. 弛み防止機構の解放状態を示す説明図である。It is explanatory drawing which shows the release state of a slack prevention mechanism. 弛み防止機構のロック状態を示す説明図である。It is explanatory drawing which shows the locked state of a slack prevention mechanism. ホルダープレートの説明図である。It is explanatory drawing of a holder plate. ホルダープレートの説明図である。It is explanatory drawing of a holder plate.

本実施形態に係る管継手１は、図１に示すように、湯や水を操作レバー５１の操作に応じて吐出可能とした水栓５０と、給水配管５２及び給湯配管５３に設けられた止水栓５４，５４とを、フレキシブルホース２，２を介して接続するために用いられており、フレキシブルホース２の一端と止水栓５４との間に介設されている。図中、符号５５で示すものは水栓本体であり、先端に吐水口を設けたスパウト５６を備えている。 As shown in FIG. 1, the pipe joint 1 according to the present embodiment includes a faucet 50 that can discharge hot water or water in response to an operation of an operation lever 51, and a stopper provided in a water supply pipe 52 and a hot water supply pipe 53. It is used to connect the faucets 54, 54 via the flexible hoses 2, 2, and is interposed between one end of the flexible hose 2 and the stop cock 54. In the figure, reference numeral 55 denotes a faucet body, which includes a spout 56 provided with a water outlet at the tip.

管継手１は、図２及び図３に示すように、実質的には管継手本体４と、これに装着されたナット部材３とから構成されるが、管継手構造としては、接続対象となるフレキシブルホース２（以下、単に「ホース２」とする。）の先端部に形成した雄ネジ部２１と、ホース２の先端側外周面又は管継手本体４の挿入口４１内周面に配設される軸シール材としての第１のＯリング（オーリング）５の存在が重要となっている。 As shown in FIGS. 2 and 3, the pipe joint 1 is substantially composed of a pipe joint body 4 and a nut member 3 attached to the pipe joint body 4, but the pipe joint structure is a connection target. A male screw portion 21 formed at the distal end portion of the flexible hose 2 (hereinafter simply referred to as “hose 2”), and an outer peripheral surface on the distal end side of the hose 2 or an inner peripheral surface of the insertion port 41 of the pipe joint main body 4. The presence of the first O-ring (O-ring) 5 as a shaft seal material is important.

すなわち、図示するように、本実施形態に係る管継手構造は、先端部となるニップル２０に雄ネジ部２１が形成された前述のホース２と、このホース２の雄ネジ部２１と螺合可能なナット部材３と、このナット部材３を回転自在、かつ脱落しない状態で装着しており、ホース２の先端部をナット部材３を介して挿入可能な挿入口４１が形成された管継手本体４と、管継手本体４の挿入口４１の内周面に配設された軸シール材である第１のＯリング５とを備えている。 That is, as shown in the drawing, the pipe joint structure according to the present embodiment is capable of screwing with the above-described hose 2 in which the male threaded portion 21 is formed on the nipple 20 serving as the tip, and the male threaded portion 21 of the hose 2. A nut member 3 and a pipe joint main body 4 in which the nut member 3 is mounted so as to be rotatable and not dropped off, and an insertion port 41 into which the tip of the hose 2 can be inserted through the nut member 3 is formed. And a first O-ring 5 that is a shaft seal member disposed on the inner peripheral surface of the insertion port 41 of the pipe joint body 4.

そして、ホース２の先端をナット部材３に挿通しながら管継手本体４の挿入口４１に挿入させた状態、すなわち、ホース仮嵌装の状態でナット部材３を回転させ、このナット部材３の雌ネジ部３１とホース２の雄ネジ部２１とを螺合させることにより、第１のＯリング５を介した状態でホース２と管継手本体４とが接続される構造となっている。 Then, the nut member 3 is rotated in a state where the end of the hose 2 is inserted into the insertion port 41 of the pipe joint body 4 while being inserted into the nut member 3, that is, in a state where the hose is temporarily fitted. By screwing the screw part 31 and the male screw part 21 of the hose 2, the hose 2 and the pipe joint body 4 are connected to each other via the first O-ring 5.

以下、管継手構造をなす各構成要素について詳述する。ホース２は、可撓性を有するもので、三次元方向へ自由に屈曲可能であり、端部には筒状のニップル２０が取り付けられている。このニップル２０は、テーパ部２２が形成された先端開口側から、管継手本体４に設けられた２つの第１のＯリング５，５に摺接するシール面２３が所定長さで形成されて、このシール面２３に続いて雄ネジ部２１が形成され、この雄ネジ部２１に隣接して環状弾性部材である第２のＯリング２４が取付けられている。なお、この第２のＯリング２４も本実施形態の特徴をなすものであり、これについては後に詳述する。 Hereinafter, each component which comprises a pipe joint structure is explained in full detail. The hose 2 has flexibility, can be freely bent in a three-dimensional direction, and a cylindrical nipple 20 is attached to an end portion. The nipple 20 is formed with a predetermined length of a seal surface 23 slidably contacting the two first O-rings 5, 5 provided on the pipe joint body 4 from the tip opening side where the tapered portion 22 is formed. A male screw portion 21 is formed following the seal surface 23, and a second O-ring 24, which is an annular elastic member, is attached adjacent to the male screw portion 21. The second O-ring 24 is also a feature of this embodiment, which will be described in detail later.

管継手本体４は、金属製としており、上端面にホース２を挿通するための挿入口４１が形成されるとともに、内側周面には上下２段に第１のＯリング５，５が設けられた上側筒部４ａと、この上側筒部４ａより大径で、止水栓５４側との接続部となるネジ部４２が形成された下側筒部４ｂと、上側筒部４ａと下側筒部４ｂとを繋ぎ、内部に図示しない逆止弁などを収納配設する中間筒部４ｃとから構成されている。なお、ここでは第１のＯリング５を２本設けているが、シール性能を十分に発揮できるのであれば本数を限定するものではない。 The pipe joint body 4 is made of metal, and an insertion port 41 for inserting the hose 2 is formed in the upper end surface, and first O-rings 5 and 5 are provided in two upper and lower stages on the inner peripheral surface. The upper cylinder part 4a, the lower cylinder part 4b having a diameter larger than that of the upper cylinder part 4a and having a screw part 42 to be connected to the stop cock 54 side, the upper cylinder part 4a and the lower cylinder It is comprised from the intermediate cylinder part 4c which connects the part 4b and accommodates the check valve etc. which are not shown in figure inside. Here, two first O-rings 5 are provided, but the number is not limited as long as the sealing performance can be sufficiently exhibited.

また、ナット部材３は、これも金属製であって、管継手本体４の上側筒部４ａを微小の間隙をもって内包できる内径を有し、かつ手回しが可能な程度の外形を有する筒状の胴部３ａと、この胴部３ａに連接され、内周面にホース２の雄ネジ部２１と螺合する雌ネジ部３１が刻設された螺合部３ｂとから形成されている。さらに、管継手本体４の上側筒部４ａの下端近傍に設けられた溝部４ｄに、略Ｃ状に形成した弾性を有する脱落防止金具４３が嵌合し、ナット部材３が管継手本体４から離れる方向に移動しようとすると、脱落防止金具４３が胴部３ａの下端近傍の内側に設けられた座ぐり溝３ｄに当接することによってナット部材３の脱落を防止し、かつ、ナット部材３が管継手本体４の周りを回転自在となるようにしている（図２参照）。 Further, the nut member 3 is also made of metal, has a cylindrical body having an inner diameter capable of enclosing the upper cylindrical portion 4a of the pipe joint body 4 with a minute gap, and having an outer shape capable of being turned by hand. It is formed of a part 3a and a threaded part 3b that is connected to the body part 3a and has an internal threaded part 31 that is threadedly engaged with the male threaded part 21 of the hose 2. Further, a drop-off prevention fitting 43 having elasticity formed in a substantially C shape is fitted into a groove portion 4d provided in the vicinity of the lower end of the upper cylindrical portion 4a of the pipe joint body 4 so that the nut member 3 is separated from the pipe joint body 4. When the nut member 3 is moved in the direction, the drop-off prevention metal fitting 43 abuts against a counterbore groove 3d provided in the vicinity of the lower end of the trunk portion 3a, thereby preventing the nut member 3 from dropping off. The periphery of the main body 4 is rotatable (see FIG. 2).

このナット部材３の螺合部３ｂの先端面に形成された開口側には、ホース２を案内するガイド部３２が形成されている。 A guide portion 32 for guiding the hose 2 is formed on the opening side formed on the distal end surface of the screw portion 3 b of the nut member 3.

すなわち、図３に示すように、ナット部材３の開口始端３３と雌ネジ部３１の始端３１ａとの間をなす内周面を、ホース２の雄ネジ部２１の外径ｄよりも微小量だけ大径としたガイド部３２としている。図中、符号Ｄはガイド部３２の直径を示している。 That is, as shown in FIG. 3, the inner peripheral surface formed between the opening start end 33 of the nut member 3 and the start end 31 a of the female screw portion 31 is smaller than the outer diameter d of the male screw portion 21 of the hose 2. The guide portion 32 has a large diameter. In the figure, the symbol D indicates the diameter of the guide portion 32.

つまり、開口始端３３から、ガイド部３２が形成されるだけの所定の間隔をあけてネジを刻設して雌ネジ部３１が形成されている。かかるガイド部３２により、ホース２の先端を管継手本体４の挿入口４１に挿入させた状態であるホース仮嵌装時には、ホース２は、ナット部材３と管継手本体４の挿入口４１と同軸となるようにその姿勢が規制されることになる。 That is, the internal thread portion 31 is formed by engraving screws from the opening start end 33 at a predetermined interval enough to form the guide portion 32. The hose 2 is coaxial with the nut member 3 and the insertion port 41 of the pipe coupling body 4 when the hose is temporarily fitted by the guide portion 32 so that the tip of the hose 2 is inserted into the insertion port 41 of the pipe coupling body 4. The attitude is regulated so that

図４にホース２を管継手１に連結する手順を示しており、以下、実際に本実施形態に係る管継手１にホース２を連結する手順について説明する。 The procedure for connecting the hose 2 to the pipe joint 1 is shown in FIG. 4, and the procedure for actually connecting the hose 2 to the pipe joint 1 according to this embodiment will be described below.

すなわち、図４（ａ）に示すように、先ず、ホース２の先端を、ナット部材３の開口始端３３側から挿通しながら管継手本体４の挿入口４１に挿入してホース仮嵌装状態とする。このとき、ナット部材３の開口始端３３と雌ネジ部３１の始端３１ａとの間には前述したガイド部３２が形成されているため、一般的なナットのように、開口始端からいきなりネジが切られている構造に比べ、ホース２の先端が斜め向きになったりすることなく真っすぐに挿入することができる。 That is, as shown in FIG. 4A, first, the tip of the hose 2 is inserted into the insertion port 41 of the pipe joint body 4 while being inserted from the opening start end 33 side of the nut member 3, and the hose is temporarily fitted. To do. At this time, since the guide portion 32 described above is formed between the opening start end 33 of the nut member 3 and the start end 31a of the female screw portion 31, the screw is suddenly cut from the opening start end like a general nut. Compared with the structure currently used, it can insert straightly, without the front-end | tip of the hose 2 becoming diagonally.

しかも、ホース２を差し込み、ホース２の雄ネジ部２１の始端２１ａがナット部材３の雌ネジ部３１の始端３１ａと当接したときには、ホース２の先端は図示するように、管継手本体４の挿入口４１の開口始端によって支持されている。すなわち、ホース２の先端部をなすニップル２０は、先端が管継手本体４の挿入口４１に、中途部がナット部材３のガイド部３２によって２点支持されて安定した姿勢に保持されている。 In addition, when the hose 2 is inserted and the starting end 21a of the male threaded portion 21 of the hose 2 comes into contact with the starting end 31a of the female threaded portion 31 of the nut member 3, the tip of the hose 2 is shown in FIG. It is supported by the opening start end of the insertion port 41. That is, the nipple 20 that forms the tip of the hose 2 is held in a stable posture with the tip supported by the insertion port 41 of the pipe joint body 4 and the middle part by the guide part 32 of the nut member 3.

そして、この姿勢において、ホース２は、ナット部材３及び管継手本体４の挿入口４１と同軸となっており、ナット部材３を手で回す際にネジの締め付け抵抗が減じられてホース２の雄ネジ部２１とナット部材３の雌ネジ部３１との螺合が極めて円滑になされることになる。 In this posture, the hose 2 is coaxial with the nut member 3 and the insertion port 41 of the pipe joint body 4, and when the nut member 3 is turned by hand, the screw tightening resistance is reduced and the hose 2 is male. The screw portion 21 and the female screw portion 31 of the nut member 3 are screwed very smoothly.

このように、ナット部材３の締め付けが容易に行えるので、ホース２を管継手本体４の挿入口４１に仮嵌装されただけのロック未完了の状態で接続を完了してしまうミスを可及的に減じることができる。 In this way, the nut member 3 can be easily tightened, so that it is possible to make an error that the connection is completed in a state where the hose 2 is temporarily fitted to the insertion port 41 of the pipe joint body 4 and is not yet locked. Can be reduced.

ところで、かかるホース仮嵌装状態では、図４（ａ）に示すように、シール機能は決して発揮されないようになっている。すなわち、第１のＯリング５は、管継手本体４の挿入口４１の近傍において、ホース仮嵌装の状態ではホース２のシール面２３とは当接しない位置に取り付けられているのである。 By the way, in such a hose temporary fitting state, as shown in FIG. 4A, the sealing function is never exhibited. That is, the first O-ring 5 is attached in the vicinity of the insertion port 41 of the pipe joint main body 4 at a position where it does not come into contact with the seal surface 23 of the hose 2 in the temporarily hose-fitted state.

したがって、ホース接続時に、仮にこのようなホース仮嵌装状態で放置されてしまった場合でも、漏水の有無によって接続状態を確認する竣工前の耐圧検査などにおいて、この時点で通水すると管継手本体４から必ず漏水する（破線参照）ため、ロック未完了という不具合を容易に発見することが可能となる。つまり、あえて漏水させることでロック状態を検知することができるのである。 Therefore, if the hose is connected in such a temporary hose connection state, if the water is passed at this point in the pressure test before completion to confirm the connection state by the presence or absence of water leakage, etc. Since water always leaks from 4 (refer to the broken line), it is possible to easily find the incomplete lock. In other words, the locked state can be detected by intentionally leaking water.

次いで、ナット部材３を手で回していくと、図４（ｂ）に示すように、ホース２とナット部材３との螺合が進行するが、この状態ではまだシールが完全になされていない。すなわち、ホース２の先端部をなすニップル２０の先端には、摺動時に第１のＯリング５を傷つけたり、大きな抵抗とならないようにテーパ部２２が形成されているが、この状態では、第１のＯリング５はテーパ部２２に接しているだけで、ホース２のシール面２３には十分に当接していないからである。よって、この場合も図４（ａ）と同様に、耐圧検査などにおいて漏水するため、ロック未完了という不具合を発見できる（破線参照）。 Next, when the nut member 3 is turned by hand, as shown in FIG. 4 (b), the hose 2 and the nut member 3 are screwed together. However, in this state, the sealing is not yet complete. In other words, the tip of the nipple 20 that forms the tip of the hose 2 is formed with a tapered portion 22 so as not to damage the first O-ring 5 or cause a large resistance during sliding. This is because one O-ring 5 is only in contact with the tapered portion 22 and is not sufficiently in contact with the seal surface 23 of the hose 2. Therefore, in this case as well, as in FIG. 4A, water leaks in the pressure resistance test or the like, so that it is possible to find a problem that the lock is not completed (see broken line).

さらにホース２とナット部材３との螺合が進み、図４（ｃ）の状態になると、２つの第１のＯリング５，５がいずれもしっかりとホース２のシール面２３と当接しており、十分なシール機能が発揮される。よって、このままでも、現状のシール性だけを考えれば特に問題となることはない。 Further, when the hose 2 and the nut member 3 are further screwed together to reach the state shown in FIG. 4C, the two first O-rings 5 and 5 are firmly in contact with the sealing surface 23 of the hose 2. A sufficient sealing function is exhibited. Therefore, even if it is as it is, there is no particular problem if only the current sealing property is considered.

しかし、この状態では、未だネジ弛みのおそれがあるため、本実施形態では、確実な接続完了となったことを、作業者に視認できるようにしている。 However, in this state, since there is still a possibility of screw loosening, in the present embodiment, it is possible for the operator to visually recognize that the connection has been reliably completed.

すなわち、ホース２の雄ネジ部２１に隣接して設けた第２のＯリング２４を接続完了の目安となる目印として機能させている。つまり、第２のＯリング２４を、ホース２と管継手本体４との接続が完了したときにナット部材３の開口始端３３と面一状態となる位置、あるいは当該開口始端３３から潜り込んだ位置に設けているのである。 That is, the second O-ring 24 provided adjacent to the male screw portion 21 of the hose 2 is made to function as a mark that serves as a standard for completion of connection. That is, when the connection between the hose 2 and the pipe joint body 4 is completed, the second O-ring 24 is in a position where it is flush with the opening start end 33 of the nut member 3 or a position where the second O-ring 24 is recessed from the opening start end 33. It is provided.

したがって、図４（ｃ）の状態では、未だ第２のＯリング２４がナット部材３の上端から覗いているため、未だ接続完了状態ではないことが分かる。他方、ナット部材３の雌ネジ部３１とホース２の雄ネジ部２１とを螺合させて行き、図４（ｄ）の状態のように、第２のＯリング２４がナット部材３に隠れて見えなくなったときには、ホース２の管継手本体４との接続が完了したことが分かる。そして、この図４（ｄ）の状態では、第２のＯリング２４の弾性でホース２のＯリング溝底面２５とガイド部３２の両方に摩擦力を生じさせてナット部材３の雌ネジ部３１とホース２の雄ネジ部２１との弛みも防止することができる。 Therefore, in the state of FIG. 4C, it can be seen that the second O-ring 24 is still peeping from the upper end of the nut member 3, so that the connection is not yet completed. On the other hand, the female screw portion 31 of the nut member 3 and the male screw portion 21 of the hose 2 are screwed together, and the second O-ring 24 is hidden by the nut member 3 as shown in FIG. When it disappears, it turns out that the connection with the pipe joint main body 4 of the hose 2 is completed. 4D, the elastic force of the second O-ring 24 causes a frictional force to be generated on both the O-ring groove bottom surface 25 and the guide portion 32 of the hose 2, so that the female screw portion 31 of the nut member 3 is formed. And slack between the male screw portion 21 of the hose 2 can be prevented.

ところで、ホース接続作業は、例えば、台所などのシンク下の暗所などで行われることも多いため、ここでは、第２のＯリング２４として、例えば、ピンク色の蛍光材料が配合されたものを用いている。したがって、作業者は、暗所での作業であっても、接続完了状態であることを視認することができる。 By the way, the hose connection work is often performed, for example, in a dark place under a sink such as a kitchen. Therefore, here, as the second O-ring 24, for example, a combination of a pink fluorescent material is used. Used. Therefore, the worker can visually recognize that the connection is complete even in a dark place.

次に、図５〜図１０を参照しながら本発明の変形例及び他の実施形態に係る管継手構造について説明する。なお、以下の説明では、上述してきた実施形態と同一の構成要素については同一の符号を用いてその説明は省略する。 Next, a modified example of the present invention and a pipe joint structure according to another embodiment will be described with reference to FIGS. In the following description, the same components as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof is omitted.

図５に示す変形例では、ホース２の先端部分と管継手本体４の挿入口４１との間に、それぞれ互いに嵌合する異形部９を形成している。ここでは、異形部９として、複数の溝が形成されたスプライン加工を施している。したがって、ナット部材３によるネジ締めの際に、ホース２は溝同士が噛合して直進していくことになり、ホース２が捩れたりすることがなく、ホース２と管継手本体４との接続作業における作業性を向上させることができる。なお、スプライン加工に代えてローレット加工を施しても構わない。 In the modification shown in FIG. 5, deformed portions 9 that are fitted to each other are formed between the distal end portion of the hose 2 and the insertion port 41 of the pipe joint body 4. Here, spline processing in which a plurality of grooves are formed is applied as the deformed portion 9. Accordingly, when the nut member 3 is tightened with the screw, the groove of the hose 2 meshes with each other and goes straight, so that the hose 2 is not twisted and the hose 2 and the pipe joint body 4 are connected. Workability can be improved. Note that knurling may be performed instead of spline processing.

また、他の実施形態に係る管継手構造として、図６〜図８に示すように、ナット部材３とホース２との螺合が完了して、管継手本体４とホース２とが接続完了したときにのみ作用する弛み防止機構６を備えた構成とすることができる。なお、図７は図６（ａ）のＩ−Ｉ線における断面図であり、図８は図６（ｂ）のＪ−Ｊ線における断面図である。そして、図６（ａ）及び図７は弛み防止機構６の解放状態（アンロック状態）を示し、図６（ｂ）及び図８は弛み防止機構６のロック状態を示している。 Moreover, as shown in FIGS. 6-8, as the pipe joint structure which concerns on other embodiment, the screwing of the nut member 3 and the hose 2 was completed, and the pipe joint main body 4 and the hose 2 were connected. It can be set as the structure provided with the slack prevention mechanism 6 which acts only occasionally. 7 is a cross-sectional view taken along the line II of FIG. 6A, and FIG. 8 is a cross-sectional view taken along the line JJ of FIG. 6B. 6A and 7 show the released state (unlocked state) of the slack preventing mechanism 6, and FIGS. 6B and 8 show the locked state of the slack preventing mechanism 6. FIG.

弛み防止機構６は、プレート部材７と、プレート部材７の弾性による収縮、拡開の際の支点部としてプレート部材７の中央に設けられた凸部７４と、ナット部材３に設けられ前記凸部７４と嵌合する凹部３４と、このプレート部材７を保持するホルダー部材８と、ホース２の先端部分の外周面に形成された溝部６１及び六角面６２とから構成されており、ナット部材の凹部３４に凸部７４を嵌合させたプレート部材７をホルダー部材８に保持させた状態で、ナット部材３の上部にホース２の周りに回動自在に装着している。なお、六角面６２は前記多角形の面の一例として提示したものである。また、本実施形態では、支点部を凸部として、支点部と嵌合する箇所を凹部としたが、支点部を凹部、支点部と嵌合する箇所を凸部としてもよい。 The loosening prevention mechanism 6 includes a plate member 7, a convex portion 74 provided at the center of the plate member 7 as a fulcrum portion when the plate member 7 is contracted and expanded due to elasticity, and the convex portion provided on the nut member 3. 74, a recess 34 that fits with the plate 74, a holder member 8 that holds the plate member 7, and a groove 61 and a hexagonal surface 62 formed on the outer peripheral surface of the tip of the hose 2. The plate member 7 having the convex portion 74 fitted to 34 is held by the holder member 8 and is mounted on the upper portion of the nut member 3 so as to be rotatable around the hose 2. The hexagonal surface 62 is presented as an example of the polygonal surface. Further, in this embodiment, the fulcrum portion is a convex portion, and the portion fitted to the fulcrum portion is a concave portion. However, the fulcrum portion may be a concave portion and the portion fitted to the fulcrum portion may be a convex portion.

プレート部材７は、弾性を有する金属材料により形成され、図７及び図８に示すように、弾性平面部７１，７１を有し、この弾性平面部７１の中央にはプレート部材７の弾性変形の際の支点として凸部７４が設けられ、これら弾性平面部７１，７１に続く部分には、それぞれ立面部７３が立設され、さらにその先には糸切り鋏のように爪部７２，７２が設けられている。そして、ホース２とナット部材３との螺合が完了し、ナット部材３の回転が停止した状態（図６（ｂ）及び図８）において、ホルダー部材８のカム部８２によって外から内に向かう外力が加えられると、ナット部材３に支点を置くプレート部材７がこれら左右一対の立面部７３，７３を、前記六角面６２の左右から挟むように当接させて、ホース２を回転しないよう規制する。（図８）。しかも、各爪部７２は、ナット部材３に形成された雌ネジ部３１とホース２に形成された雄ネジ部２１とが螺合し、ナット部材３の回転が停止する位置でのみ、前記溝部６１と高さ方向の位置が合致して嵌合するようにしている。 The plate member 7 is formed of a metal material having elasticity, and has elastic flat portions 71 and 71 as shown in FIGS. 7 and 8. The plate member 7 has elastic deformation at the center of the elastic flat portion 71. A convex portion 74 is provided as a fulcrum at the time, and an elevating surface portion 73 is erected on each of the portions following the elastic flat surface portions 71 and 71, and further, claw portions 72 and 72 like a thread trimming scissors are provided on the further ends. Is provided. Then, in a state where the screwing of the hose 2 and the nut member 3 is completed and the rotation of the nut member 3 is stopped (FIGS. 6B and 8), the cam portion 82 of the holder member 8 moves from the outside to the inside. When an external force is applied, the plate member 7 that places a fulcrum on the nut member 3 abuts the pair of left and right standing surfaces 73 and 73 from the left and right of the hexagonal surface 62 so that the hose 2 does not rotate. regulate. (FIG. 8). In addition, each claw 72 has the groove portion only at a position where the female screw portion 31 formed on the nut member 3 and the male screw portion 21 formed on the hose 2 are screwed together to stop the rotation of the nut member 3. 61 and the position in the height direction are matched and fitted.

一方、ホルダー部材８は、合成樹脂材で形成されており、ナット部材３と係合して当該ナット部材３の周り、すなわちホース２の周りに回転可能に形成されている。また、プレート部材７を収納保持できるように、ホルダー部材８の内部にはプレート保持空間８１が形成されるとともに、このプレート保持空間８１を形成する周壁に、プレート部材７の外周端面７５に外側から当接する三日月状のカム部８２，８２が対向状態に形成されている。 On the other hand, the holder member 8 is formed of a synthetic resin material, and is formed so as to be able to rotate around the nut member 3, that is, around the hose 2 by engaging with the nut member 3. In addition, a plate holding space 81 is formed inside the holder member 8 so that the plate member 7 can be stored and held. A peripheral wall that forms the plate holding space 81 is formed on the outer peripheral end surface 75 of the plate member 7 from the outside. The abutting crescent-shaped cam portions 82, 82 are formed in an opposing state.

すなわち、本実施形態では、ホース２の先端部分の外周面に形成された溝部６１及び六角面６２と、ナット部材３に形成された雌ネジ部３１とホース２に形成された雄ネジ部２１とが螺合し、ナット部材３の回転が停止する位置でのみ溝部６１と嵌合する爪部７２，７２と、六角面６２を回転しないよう規制する立面部７３，７３とを有するプレート部材７と、このプレート部材７を保持するとともに、外周端面７５、７５に当接するカム部８２，８２が形成され、かつナット部材３と係合して当該ナット部材３の周りに回転可能としたホルダー部材８とを備え、ナット部材３に形成された雌ネジ部３１とホース２に形成された雄ネジ部２１とが螺合完了したときにホルダー部材８を回転させると、カム部８２，８２によりプレート部材７の弾性平面部７１，７１に弾性エネルギーを溜めながら、外周端面７５を押して爪部７２並びに立面部７３を軸中心方向へ収縮させる一方、雄ネジ部２１と雌ネジ部３１との螺合を解除するために逆回転させると、カム部８２，８２が弾性平面部７１，７１の弾性エネルギーを解放させてプレート部材７の爪部７２並びに立面部７３を拡開させることにより当該爪部７２，７２と溝部６１との嵌合を解除するとともに、六角面６２の回転規制についても解除するようにしている。 That is, in the present embodiment, the groove 61 and the hexagonal surface 62 formed on the outer peripheral surface of the tip portion of the hose 2, the female screw portion 31 formed on the nut member 3, and the male screw portion 21 formed on the hose 2, Are engaged with each other, and the plate member 7 has claw portions 72, 72 that engage with the groove portion 61 only at a position where the rotation of the nut member 3 stops, and elevating surface portions 73, 73 that restrict the hexagonal surface 62 from rotating. And a holder member that holds the plate member 7 and is formed with cam portions 82 and 82 that come into contact with the outer peripheral end faces 75 and 75 and engages with the nut member 3 to rotate around the nut member 3. When the holder member 8 is rotated when the female screw portion 31 formed on the nut member 3 and the male screw portion 21 formed on the hose 2 are completely screwed together, the cam portions 82 and 82 Of member 7 While the elastic flat surface portions 71 and 71 accumulate elastic energy, the outer peripheral end surface 75 is pushed to contract the claw portion 72 and the vertical surface portion 73 in the axial center direction, while the screwing of the male screw portion 21 and the female screw portion 31 is released. When the reverse rotation is performed, the cam portions 82 and 82 release the elastic energy of the elastic plane portions 71 and 71 to expand the claw portion 72 and the elevation surface portion 73 of the plate member 7, thereby expanding the claw portion 72, The fitting between the groove 72 and the groove 61 is released, and the rotation restriction of the hexagonal surface 62 is also released.

かかる構成により、ナット部材３に形成された雌ネジ部３１とホース２に形成された雄ネジ部２１とが螺合完了したときに、ホルダー部材８を９０度回転させたロック位置にすると、カム部８２，８２によりプレート部材７の爪部７２並びに立面部７３を軸中心方向へ収縮させる一方、雄ネジ部２１と雌ネジ部３１との螺合を解除するときにやはり９０度逆回転させたアンロック位置にすると、カム部８２，８２によりプレート部材７の爪部７２並びに立面部７３を拡開させて各爪部７２とホース２の溝部６１との嵌合を解除するとともに、六角面６２の回転規制についても解除することで前記ねじの螺合解除ができる状態となる。 With this configuration, when the female screw portion 31 formed on the nut member 3 and the male screw portion 21 formed on the hose 2 are completely screwed together, the holder member 8 is turned to the locked position rotated 90 degrees. While the claw portion 72 and the elevation surface portion 73 of the plate member 7 are contracted in the axial center direction by the portions 82, 82, when the screwing of the male screw portion 21 and the female screw portion 31 is released, the claw portion 72 and the vertical surface portion 73 are also reversely rotated by 90 degrees. When the unlocked position is set, the claw portions 72 and the elevation surface portions 73 of the plate member 7 are expanded by the cam portions 82 and 82 to release the fitting between the claw portions 72 and the groove portions 61 of the hose 2, and By releasing also the rotation restriction of the surface 62, the screw can be unscrewed.

このように、弛み防止機構６を備えたことにより、管継手本体４とホース２とが接続完了した後は、ホース２は外れることがないので安全性が高まる。他方、ナット部材とホースとの螺合が完了しない状態では、ホルダー部材８をロック方向に回転させても、ホース２の先端部分の外周面に形成された溝部６１にはプレート部材７の爪部７２，７２が嵌合しないため、ホルダー部材８がロック位置まで到達せず、ホース接続が未完了であることを容易に認識することができる。さらに、六角面６２でナット部材３とホース２との相対運動を停止させているため、ホース２の雄ネジ部２１及びナット部材３の雌ネジ部３１による摩擦によらずにネジ弛み防止が可能となる。 As described above, since the slack prevention mechanism 6 is provided, the safety of the hose 2 is improved because the hose 2 is not detached after the pipe joint body 4 and the hose 2 are completely connected. On the other hand, in the state where the screwing of the nut member and the hose is not completed, even if the holder member 8 is rotated in the locking direction, the groove 61 formed on the outer peripheral surface of the tip portion of the hose 2 has a claw portion of the plate member 7. Since 72 and 72 do not fit, the holder member 8 does not reach the lock position, and it can be easily recognized that the hose connection is incomplete. Furthermore, since the relative movement between the nut member 3 and the hose 2 is stopped by the hexagonal surface 62, it is possible to prevent loosening of the screw without friction caused by the male screw portion 21 of the hose 2 and the female screw portion 31 of the nut member 3. It becomes.

また、図７〜図１０に示すように、ホルダー部材８の周壁に、片持ち支持されるとともに、先端に凸部８３が形成された爪体８４を形成する一方、ナット部材３の上側外周面には、ロック位置とアンロック位置とで前記凸部８３が入り込む凹部３４を少なくとも２個以上形成している。したがって、ホルダー部材８を手で回転させたときに、そのクリック感で９０度回したことを容易に認識することができる。 As shown in FIGS. 7 to 10, on the peripheral wall of the holder member 8, a nail body 84 that is cantilevered and has a protrusion 83 formed at the tip is formed, while the upper outer peripheral surface of the nut member 3 is formed. In this case, at least two or more concave portions 34 into which the convex portions 83 enter are formed at the locked position and the unlocked position. Therefore, when the holder member 8 is rotated by hand, it can be easily recognized that the holder member 8 is rotated 90 degrees with the click feeling.

しかも、ここでは、浅い凹部３４ａと深い凹部３４ｂとを９０度ずらして設け、ホース２の管継手本体４への接続作業が完了してホルダー部材８をロック位置まで回転させると、ホルダー部材８の周壁に形成された爪体８４の凸部８３はナット部材３の浅い凹部３４ａに入り込み、一方、アンロック位置では深い凹部３４ｂに入り込むようにしている。 In addition, here, when the shallow concave portion 34a and the deep concave portion 34b are provided by being shifted by 90 degrees, and the connection work of the hose 2 to the pipe joint body 4 is completed and the holder member 8 is rotated to the locked position, the holder member 8 The convex portion 83 of the claw body 84 formed on the peripheral wall enters the shallow concave portion 34a of the nut member 3, while entering the deep concave portion 34b at the unlock position.

そのため、図８に示すように、ロック位置では凸部８３が所定の高さだけ周壁から突き出ることになり、ホルダー部材８がアンロック位置にある場合は、図７に示すように、凸部８３はナット部材３の深い凹部３４ｂに入り込むため、周壁から突き出ることがない。よって、作業者は、爪体８４がホルダー部材８の外周面から突き出ているか否かを指先による触覚で、あるいは目による視覚で認識することにより、ホース接続作業の完了を確認することができる。 Therefore, as shown in FIG. 8, the convex portion 83 protrudes from the peripheral wall by a predetermined height at the locked position. When the holder member 8 is at the unlocked position, as shown in FIG. Enters the deep recess 34b of the nut member 3, and therefore does not protrude from the peripheral wall. Therefore, the operator can confirm the completion of the hose connection work by recognizing whether or not the nail body 84 protrudes from the outer peripheral surface of the holder member 8 by a tactile sense with a fingertip or visually.

なお、凹部３４の深さと、ホルダー部材８のロック位置とアンロック位置との対応関係は必ずしも上述した通りに限定されず、ロック位置に深い凹部３４ｂを、アンロック位置には浅い凹部３４ａを対応させてもよい。また、必ずしもクリック感が必要でない場合は、凹部３４を浅いものと深いものとに区分せず、ロック位置あるいはアンロック位置のいずれかのときに凹部３４に爪体８４の凸部８３が入り込むようにしてもよい。 The correspondence relationship between the depth of the recess 34 and the lock position and unlock position of the holder member 8 is not necessarily limited as described above, and the deep recess 34b corresponds to the lock position and the shallow recess 34a corresponds to the unlock position. You may let them. In addition, when the click feeling is not necessarily required, the concave portion 34 is not divided into a shallow portion and a deep portion, and the convex portion 83 of the claw body 84 enters the concave portion 34 at either the locked position or the unlocked position. It may be.

以上、本発明の好ましい実施形態について説明したが、本発明は上述してきた各実施形態に限定されるものではなく、特許請求の範囲に記載された本発明の要旨の範囲内において、種々の変形・変更が可能である。 As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to each embodiment mentioned above, In the range of the summary of this invention described in the claim, various deformation | transformation are carried out.・ Change is possible.

１管継手
２フレキシブルホース
３ナット部材
４管継手本体
５第１のＯリング（軸シール材）
６弛み防止機構
７プレート部材
８ホルダー部材
２１雄ネジ部
２４第２のＯリング（環状弾性部材）
３１雌ネジ部
３２ガイド部
６１溝部
６２六角面
７１弾性平面部
７２爪部
７３立面部
７５外周端面
８２カム部 1 Fitting 2 Flexible hose 3 Nut member 4 Fitting body 5 First O-ring (shaft seal material)
6 Loosening prevention mechanism 7 Plate member 8 Holder member 21 Male screw portion 24 Second O-ring (annular elastic member)
31 Female thread portion 32 Guide portion 61 Groove portion 62 Hexagonal surface 71 Elastic flat surface portion 72 Claw portion 73 Elevated surface portion 75 Outer peripheral end surface 82 Cam portion

Claims

A hose through which fluid passes from the front end opening side to the inside where a male thread portion having an outer diameter larger than the outer diameter of the sealing surface and the sealing surface is sequentially formed;
A nut member that can be screwed with the male screw portion of the hose;
A fitting body in which the nut member is rotatably and mounted in a state where it does not fall off, and an insertion port is formed through which the tip of the hose can be inserted through the nut member;
A shaft seal member that is disposed on the outer peripheral surface of the hose tip side or the inner peripheral surface of the insertion port of the pipe joint body and seals the seal surface of the hose and the inner peripheral surface of the insertion port of the pipe joint body ,
With
By rotating the nut member with the hose temporarily fitted with the tip of the hose inserted into the insertion port, and screwing the female screw portion of the nut member and the male screw portion of the hose, the shaft A pipe joint structure, wherein the hose and the pipe joint body are connected via a sealing material.

The shaft seal material is provided at a position where the seal function cannot be exhibited in the state of the hose provisional fitting state, on the tip end side of the hose or the insertion port side of the pipe joint main body. The pipe joint structure described in 1.

Between the opening start end of the nut member and the start end of the female screw portion, a guide portion having a diameter larger than the outer diameter of the male screw portion of the hose is formed, and the hose is connected to the nut member by the guide portion. The pipe joint structure according to claim 1 or 2, wherein a hose posture in the state of temporary fitting of the hose can be regulated so as to be coaxial with an insertion port of the pipe joint main body.

An annular elastic member is attached to the hose, and the attachment position of the annular elastic member is screwed between the female screw portion of the nut member and the male screw portion of the hose, and the hose and the pipe joint 4. The position according to claim 1, wherein when the connection with the main body is completed, the nut member has a position that is flush with the opening start end of the nut member, or a position that is recessed from the opening start end. Pipe joint structure.

The pipe joint according to any one of claims 1 to 4, wherein a deformed part that fits to each other is formed between the outer peripheral surface of the tip of the hose and the insertion port of the pipe joint main body. Construction.

And screwing is completed between the nut member and the hose, provided with a slack preventing mechanism which acts only when said fitting body and said hose is connected completed,
This loosening prevention mechanism
A groove and a polygonal surface formed on the outer peripheral surface of the tip portion of the hose;
A claw portion that engages with the groove portion only at a position where rotation of the nut member stops when a female screw portion formed on the nut member and a male screw portion formed on the hose are screwed together, and the polygon A plate member having an elevating portion that restricts the surface of the plate from rotating, an elastic plane portion that contracts and expands the claw portion and the elevating portion, and a fulcrum portion provided on the elastic plane portion,
A holder member that holds the plate member and is formed with a cam portion that contacts the outer peripheral end surface of the plate member, and that engages with the nut member and is rotatable around the nut member;
A concave or convex portion provided on the nut member and fitted to a fulcrum portion of the plate member;
When the holder member is rotated when the female screw portion formed on the nut member and the male screw portion formed on the hose are completely screwed together, the claw portion and the vertical surface portion of the plate member are rotated by the cam portion. Is retracted in the axial center direction, and when the screw is reversely rotated when releasing the threaded engagement between the male screw portion and the female screw portion, the cam portion causes the claw portion and the elevation portion of the plate member to expand. The pipe joint structure according to any one of claims 1 to 5, wherein the fitting between the claw portion and the groove portion is released, and the rotation restriction of the polygonal surface is also released.