JP4949119B2 - Pipe fitting - Google Patents

Pipe fitting Download PDF

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JP4949119B2
JP4949119B2 JP2007120139A JP2007120139A JP4949119B2 JP 4949119 B2 JP4949119 B2 JP 4949119B2 JP 2007120139 A JP2007120139 A JP 2007120139A JP 2007120139 A JP2007120139 A JP 2007120139A JP 4949119 B2 JP4949119 B2 JP 4949119B2
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nipple
socket
pin
peripheral surface
inner peripheral
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JP2008275085A (en
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幹 吉田
武 風呂中
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Disco Corp
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Disco Corp
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Description

本発明は、接続される一対の管体の先端に装着され、それら管体を着脱可能に連結する管継手に関する。   The present invention relates to a pipe joint that is attached to the distal ends of a pair of connected pipe bodies and removably connects the pipe bodies.

半導体や電子部品などを切断加工するダイヤモンドブレードを用いた湿式切断装置では、加工点の発熱を抑制するとともに、半導体などを切断する時に発生する切断屑を除去するために加工点に切削水を供給しながら加工が行われる。切削水は用途を終えた後は廃水とされ、廃水は配管を通じて廃水処理設備に集められ処理される。この廃水処理設備は通常、廃水を吸入するポンプと切削屑などを濾過するフィルタを備えている。   Wet cutting equipment that uses diamond blades to cut semiconductors and electronic parts, etc., while controlling heat generation at the processing points and supplying cutting water to the processing points to remove cutting waste generated when cutting semiconductors, etc. While being processed. The cutting water is used as waste water after the use is finished, and the waste water is collected and processed in a waste water treatment facility through a pipe. This wastewater treatment facility usually includes a pump that sucks wastewater and a filter that filters cutting waste and the like.

廃水処理設備で使用されているフィルタは、上記切削屑などをキャッチするため、やがては目詰まりが生じるおそれがある。フィルタが目詰まりの状態になると、廃水処理設備の処理能力の低下がしてしまうため、一定時間の使用ごとにフィルタの交換が行われる。このとき、上記配管を外す場合があり、配管を取り外すには、予め配管の途中などに着脱式の管継手を設け、管継手を外すといった手段がある。   Since the filter used in the wastewater treatment facility catches the above-mentioned cutting waste and the like, there is a risk that clogging will occur over time. When the filter is clogged, the treatment capacity of the wastewater treatment facility is reduced, so that the filter is replaced every time the filter is used for a certain period of time. At this time, the piping may be removed, and in order to remove the piping, there is a means in which a detachable pipe joint is provided in the middle of the pipe in advance and the pipe joint is removed.

着脱式の管継手は種々提供されており、特許文献1のワンタッチ式カプラもそのような継手の一例である。   Various detachable pipe joints are provided, and the one-touch coupler of Patent Document 1 is an example of such a joint.

実開平02−017207公報Japanese Utility Model Publication No. 02-017207

上記特許文献に記載されるように通常の管継手は、一方の継手の部材に他方の継手部材を着脱可能に装着する形式である。このような管継手にあっては、配管内に圧力がかかった状態で外すと、内圧によって双方の継手部材が勢いよく離間する。このため、取り外し作業をしにくいといった問題があった。   As described in the above-mentioned patent document, a normal pipe joint is a type in which the other joint member is detachably attached to a member of one joint. In such a pipe joint, when the pressure is removed in the pipe, both the joint members are vigorously separated by the internal pressure. For this reason, there has been a problem that it is difficult to remove.

よって本発明は、取り外すときに配管内の圧力によって一対の継手部材が勢いよく離間することが効果的に防止され、取り外し作業を安全かつ容易に行うことができる管継手を提供することを目的としている。   Accordingly, an object of the present invention is to provide a pipe joint in which a pair of joint members can be effectively prevented from being vigorously separated due to pressure in the pipe when removed, and the removal work can be performed safely and easily. Yes.

本発明は、円筒状のニップル挿入孔を有するソケットのニップル挿入孔に、円筒状のニップルが着脱可能に挿入される管継手であって、ソケットのニップル挿入孔の内周面には、径方向内側に突出する固定ピンと、該内周面から径方向内側に対して進退自在、かつ付勢部材によって該内周面から進出するように付勢されている可動ピンとが設けられており、ソケットには、可動ピンをニップル挿入孔の内周面から退避させるロック解除手段が設けられており、一方、ニップルのソケットへの挿入側である一端部の外周面には、固定ピンおよび可動ピンがそれぞれ係合するピン係合溝が形成されており、このピン係合溝は、挿入側の端面に開口するとともに該開口から一方の方向にほぼ沿って延びてから、ピン係止部となる屈曲部を経て、一方の周方向側とは反対側の他方の周方向側に蛇行しており、その蛇行した部分には可動ピンが嵌合する嵌合凹部が形成されているピン係合溝が形成されており、さらにソケットの内周面およびニップルの先端部または外周面には、ニップルの嵌合凹部にソケットの可動ピンが到達した状態で互いに液密的に密着する密着部がそれぞれ設けられており、固定ピンと可動ピンがピン係止部に係止しているときに、ソケット側の密着部に対するニップル側の密着部の密着状態が解除され、かつ、該ソケットと該ニップルとは離間しない状態となることを特徴としている。 The present invention relates to a pipe joint in which a cylindrical nipple is detachably inserted into a nipple insertion hole of a socket having a cylindrical nipple insertion hole, and the inner peripheral surface of the socket nipple insertion hole has a radial direction. A fixed pin that protrudes inward and a movable pin that is movable forward and backward from the inner peripheral surface to the inner side in the radial direction and that is biased so as to advance from the inner peripheral surface by a biasing member are provided in the socket. it is a movable pin and unlocking means for retracting is provided from the inner peripheral surface of the nipple insertion holes, whereas, on the outer circumferential surface of the one end portion which is inserted the side to nipple socket, fixed pins and the movable pins are respectively An engaging pin engaging groove is formed, and the pin engaging groove opens at an end face on the insertion side and extends substantially along one direction from the opening, and then a bent portion that becomes a pin locking portion. Through The circumferential side and meanders in the other circumferential direction of the opposite side is formed with a pin engaging a groove fitting recess in which the movable pin is fitted is formed at the meandering portion, further the inner circumferential surface and the tip portion or the outer peripheral surface of the nipple socket contact portion for liquid-tightly close contact with each other in the fitting recess of the nipple in a state in which the movable pin of the socket has reached are provided respectively, the fixed pins and the movable When the pin is locked to the pin locking portion, the close contact state of the close contact portion on the nipple side with respect to the close contact portion on the socket side is released, and the socket and the nipple are not separated from each other. It is said.

本発明の管継手を装着状態にするには、次のように操作する。まず、ソケットの可動ピンをロック解除手段によりニップル挿入孔の内周面から退避させた状態として、可動ピンと固定ピンをそれぞれピン係合溝に開口から挿入して係合させる。そして、各ピンを各ピン係合溝に沿って進入させながら、ニップルをソケットのソケット挿入孔に相対的に挿入する。ニップルの嵌合凹部にソケットの可動ピンが到達したら、ロック解除手段による可動ピンの退避を終了し、可動ピンを嵌合凹部に嵌合させる。この状態で、ソケットとニップルとの密着部が液密的に互いに密着し、管継手の連結が完了する。逆にソケットからニップルを外すときは、ロック解除手段により可動ピンを嵌合凹部から退避させ、各ピンを各ピン係合溝に沿わせながらソケットとニップルとを相対的に離していく。このとき、配管内に圧力が残存していると、ソケットとニップルとの密着状態が解除されると同時に配管内の圧力が配管外へ放出されることにより、その圧力に応じた力でニップルとソケットは互いに離れようとする。しかしながら、本発明では、固定ピンおよび可動ピンがピン係合溝に設けられたピン係止部にそれぞれ引っ掛かり、ニップルとソケットは離間しない。配管内の圧力が抜けたら、各ピンが各係止部に係止している状態を外して、さらに各ピンを各ピン係合溝に沿わせながらソケットからニップルを相対的に離していき、各ピンが各係合溝の開口から出ると、ソケットからニップルが取り外された状態となる。   To put the pipe joint of the present invention into a mounted state, the following operation is performed. First, with the movable pin of the socket retracted from the inner peripheral surface of the nipple insertion hole by the unlocking means, the movable pin and the fixed pin are inserted into the pin engaging grooves from the openings and engaged. Then, the nipple is relatively inserted into the socket insertion hole of the socket while causing each pin to enter along each pin engaging groove. When the movable pin of the socket reaches the fitting recess of the nipple, the retracting of the movable pin by the unlocking means is finished, and the movable pin is fitted into the fitting recess. In this state, the close contact portions of the socket and the nipple are in close contact with each other in a liquid-tight manner, and the coupling of the pipe joint is completed. Conversely, when the nipple is removed from the socket, the movable pin is retracted from the fitting recess by the unlocking means, and the socket and the nipple are relatively separated from each other along each pin engaging groove. At this time, if pressure remains in the pipe, the close contact between the socket and the nipple is released, and at the same time, the pressure in the pipe is released to the outside of the pipe. The sockets try to be separated from each other. However, in the present invention, the fixed pin and the movable pin are respectively hooked on the pin locking portions provided in the pin engaging groove, and the nipple and the socket are not separated from each other. When the pressure in the piping is released, remove the state where each pin is locked to each locking part, and further move the nipple from the socket relatively along each pin engaging groove, When each pin exits from the opening of each engagement groove, the nipple is removed from the socket.

本発明によれば、配管内に圧力が残存している状態でソケットからニップルを外そうとした場合、固定ピンならびに可動ピンがピン係止部に一旦引っ掛かるため、一度に勢いよくソケットとニップルとが離間することがなく、この一次操作のときに配管内の圧力が抜け、常圧とすることができる。そして、次の実際のニップルをソケットから抜く二次操作のときは、常圧の状態で行うことになる。その結果、ソケットとニップルの取り外し作業を安全かつ容易に行うことができる。   According to the present invention, when an attempt is made to remove the nipple from the socket while pressure remains in the pipe, the fixed pin and the movable pin are once hooked on the pin locking portion. Are not separated from each other, and the pressure in the pipe is released during the primary operation, so that the normal pressure can be obtained. And in the secondary operation which pulls out the next actual nipple from a socket, it will carry out in the state of a normal pressure. As a result, the socket and nipple can be removed safely and easily.

本発明では、ニップルのピン係合溝が、上記のように開口から一方の周方向にほぼ沿って延びてから、屈曲部を経て、一方の周方向側とは反対側の他方の周方向側に蛇行しており、この屈曲部がピン係止部となっており、ソケットにニップルを挿入するときには、各ピンが開口からピン係止部に至るまでは、ソケットが一方の周方向に回転するよう、ソケットとニップルとを相対回転させ、次いで、各ピンが各係止部を通した後は、逆方向に回転させる。この状態では、内圧を抜く一次操作と、実際にニップルとソケットを離間させる二次操作にめりはりがあり、使い勝手が良いという利点がある。 In the present invention , the pin engaging groove of the nipple extends substantially along one circumferential direction from the opening as described above, then passes through the bent portion, and the other circumferential side opposite to the one circumferential side. and meanders, has become the bent portion is a pin engaging portion, when inserting the nipple into the socket, until the pin reaches the pin engaging portion from the opening, the socket is rotated in one circumferential direction The socket and the nipple are rotated relative to each other, and then each pin is rotated in the opposite direction after passing through each locking portion. In this state, there is an advantage that the primary operation for releasing the internal pressure and the secondary operation for actually separating the nipple and the socket are convenient and easy to use.

本発明の管継手は、ソケットに固定ピンと可動ピンとを設けるとともに、ニップルにピン係合溝とピン係止部を設けることで、ソケットからニップルを取り外そうとして配管内に残存している圧力が解放しても、ソケットとニップルとが勢いよく一度で離間することを防止できる。したがって、ソケットとニップルの取り外し作業を安全かつ容易に行うことができるといった効果を奏する。   In the pipe joint of the present invention, the fixed pin and the movable pin are provided in the socket, and the pin engaging groove and the pin locking portion are provided in the nipple, so that the pressure remaining in the pipe when the nipple is removed from the socket is reduced. Even if the socket is released, it is possible to prevent the socket and the nipple from moving away at once. Therefore, the socket and nipple can be removed safely and easily.

図1は、一実施形態の管継手1を構成する各部品と管体2、3とを示した斜視図である。管継手1は円筒状のニップル10とソケット20とで構成されている。この管継手1は、ニップル10とソケット20がそれぞれの管体2、3の先端に装着され、それら管体2、3を着脱可能に連結するものである。   FIG. 1 is a perspective view showing components and pipe bodies 2 and 3 constituting a pipe joint 1 according to an embodiment. The pipe joint 1 is composed of a cylindrical nipple 10 and a socket 20. In this pipe joint 1, a nipple 10 and a socket 20 are attached to the distal ends of the pipe bodies 2 and 3, and the pipe bodies 2 and 3 are detachably connected.

管体2、3の先端には、それぞれナット2b、3bが一体に形成されたカプラ2a、3aが装着されている。ニップル10は、ベースとなる円筒状の大径筒部11を有し、この大径筒部11の軸方向一端部に円筒状のねじ部12が同軸的に形成されている。また、ソケット20は、ベースとなる円筒状の本体21を有し、この本体21の軸方向一端部に円筒状のねじ部22(図3参照)が同軸に形成されている。ニップル10およびソケット20は、ねじ部12、22にカプラ2a、3aのナット2b、3bをそれぞれ螺合することにより、管体2、3の先端にそれぞれ装着される。本実施形態では、ねじ式を用いて管体と管継手(ニップル10とソケット20)を固定しているが、管体と管継手を固定できる機構であればこれに限らない。   Couplers 2a and 3a, which are integrally formed with nuts 2b and 3b, are attached to the ends of the pipe bodies 2 and 3, respectively. The nipple 10 includes a cylindrical large-diameter cylindrical portion 11 serving as a base, and a cylindrical screw portion 12 is coaxially formed at one axial end portion of the large-diameter cylindrical portion 11. The socket 20 has a cylindrical main body 21 as a base, and a cylindrical screw portion 22 (see FIG. 3) is coaxially formed at one axial end of the main body 21. The nipple 10 and the socket 20 are respectively attached to the distal ends of the tubular bodies 2 and 3 by screwing the nuts 2b and 3b of the couplers 2a and 3a into the threaded portions 12 and 22, respectively. In the present embodiment, the pipe body and the pipe joint (nipple 10 and socket 20) are fixed using a screw type, but the present invention is not limited to this as long as the mechanism can fix the pipe body and the pipe joint.

図2に示すように、ニップル10の大径筒部11のねじ部12側と反対の端部には、大径筒部11よりも径が小さい円筒状の小径筒部13が大径筒部11と同軸的に形成されている。ニップル10内には、大径筒部11と、ねじ部12と、小径筒部13とを貫通する管路10aが形成されている。小径筒部13の外周には、ゴムなどの弾性部材で形成されたOリング14が小径筒部13の外周面よりやや突出するように装着されている。大径筒部11の外周で小径筒部13側の端部には、小径筒部13側の端面に開口し、ねじ部12側へ延びるピン係合溝15が形成されている。このピン係合溝15は、開口から軸方向に短く延びてから直角の第一屈曲部15aを経て、一方の周方向にほぼ沿って延び、さらに第二屈曲部15bを経て、一方の周方向とは反対側の他方の周方向に斜めに延びている。このように蛇行しているピン係合溝15の終端部には、ピン係合溝15より深い嵌合凹部16が形成されている。   As shown in FIG. 2, a cylindrical small-diameter cylindrical portion 13 having a diameter smaller than that of the large-diameter cylindrical portion 11 is provided at the end opposite to the threaded portion 12 side of the large-diameter cylindrical portion 11 of the nipple 10. 11 is formed coaxially. In the nipple 10, a pipe line 10 a that penetrates the large-diameter cylindrical portion 11, the screw portion 12, and the small-diameter cylindrical portion 13 is formed. An O-ring 14 formed of an elastic member such as rubber is mounted on the outer periphery of the small diameter cylindrical portion 13 so as to slightly protrude from the outer peripheral surface of the small diameter cylindrical portion 13. A pin engaging groove 15 that opens to the end surface on the small diameter cylindrical portion 13 side and extends to the screw portion 12 side is formed at the end of the small diameter cylindrical portion 13 on the outer periphery of the large diameter cylindrical portion 11. The pin engaging groove 15 extends shortly in the axial direction from the opening, passes through a first bent portion 15a having a right angle, extends substantially along one circumferential direction, and further passes through a second bent portion 15b, and then enters one circumferential direction. It extends diagonally in the other circumferential direction on the opposite side. A fitting recess 16 deeper than the pin engaging groove 15 is formed at the end of the pin engaging groove 15 meandering in this way.

ソケット20には、図3に示すように本体21とねじ部22とを貫通する管路20aが形成されている。管路20aの本体21側の端部には、ニップル10の大径筒部11よりも径がわずかに大きいニップル挿入孔23が管路20aと同軸に形成されている。このニップル挿入孔23には、ニップル10が挿入される。また、管路20aの中間部には、ニップル10の小径筒部13よりも径がわずかに大きい中間孔24が形成されている。この中間孔24の径は、Oリング14が弾性的に密着するように設定される。ニップル10がニップル挿入孔23に挿入されると、中間孔24の内周面24aにニップル10のOリング14が密着する。   As shown in FIG. 3, a pipe 20 a that penetrates the main body 21 and the screw portion 22 is formed in the socket 20. A nipple insertion hole 23 having a diameter slightly larger than that of the large-diameter cylindrical portion 11 of the nipple 10 is formed coaxially with the conduit 20a at the end of the conduit 20a on the main body 21 side. The nipple 10 is inserted into the nipple insertion hole 23. Further, an intermediate hole 24 having a diameter slightly larger than that of the small diameter cylindrical portion 13 of the nipple 10 is formed in the intermediate portion of the pipe line 20a. The diameter of the intermediate hole 24 is set so that the O-ring 14 is elastically adhered. When the nipple 10 is inserted into the nipple insertion hole 23, the O-ring 14 of the nipple 10 comes into close contact with the inner peripheral surface 24 a of the intermediate hole 24.

ニップル挿入孔23の内周面23aには、径方向内側に突出する固定ピン25が設けられている。固定ピン25は、上記ニップル10のピン係合溝15に係合し、屈曲部15aに引っ掛かる長さ分、径方向内側へ突出している。   On the inner peripheral surface 23 a of the nipple insertion hole 23, a fixing pin 25 that protrudes radially inward is provided. The fixing pin 25 engages with the pin engaging groove 15 of the nipple 10 and protrudes inward in the radial direction by the length of being caught by the bent portion 15a.

本体21の外周面には、軸方向に延びる溝21aが形成されている。この溝21aには、リフタ26が埋設されており、リフタ26のニップル挿入孔23側の先端には、可動ピン27が設けられている。この可動ピン27は、溝21aとニップル挿入孔23とを貫通する孔21cに、ニップル挿入孔23に対して進退自在に挿入されている。リフタ26は、溝21a内で本体21の外周面に形成された一対の止め具用溝21bを貫通する止め具28を介して揺動可能に支持されている。このリフタ26の可動ピン27側と反対側の操作側端部26aと溝21aの底部との間には、ばね29が埋設されている。リフタ26の操作側端部26aは、このばね29により径方向外側に付勢されており、止め具28を軸にして、反対側の可動ピン27を径方向内側に押さえ込んでいる。これにより、可動ピン27はニップル挿入孔23の内周面23aから常に突出している。可動ピン27は、リフタ26の操作側端部26aをばね29の力に抗して径方向内側へ押すことでニップル挿入孔23の内周面23aから径方向外側へ退避する。このとき、可動ピン27は内周面23aから完全に退避せず、内周面23aより少し突出した状態になる。   A groove 21 a extending in the axial direction is formed on the outer peripheral surface of the main body 21. A lifter 26 is embedded in the groove 21a, and a movable pin 27 is provided at the tip of the lifter 26 on the nipple insertion hole 23 side. The movable pin 27 is inserted into a hole 21c penetrating the groove 21a and the nipple insertion hole 23 so as to be movable forward and backward with respect to the nipple insertion hole 23. The lifter 26 is swingably supported via a stopper 28 that penetrates a pair of stopper grooves 21b formed on the outer peripheral surface of the main body 21 in the groove 21a. A spring 29 is embedded between the operation side end 26a opposite to the movable pin 27 side of the lifter 26 and the bottom of the groove 21a. The operation side end portion 26a of the lifter 26 is urged radially outward by the spring 29 and presses the movable pin 27 on the opposite side radially inward with the stopper 28 as an axis. Thereby, the movable pin 27 always protrudes from the inner peripheral surface 23 a of the nipple insertion hole 23. The movable pin 27 is retracted radially outward from the inner peripheral surface 23a of the nipple insertion hole 23 by pushing the operation side end 26a of the lifter 26 radially inward against the force of the spring 29. At this time, the movable pin 27 is not completely retracted from the inner peripheral surface 23a, but is slightly protruded from the inner peripheral surface 23a.

図3bに示すように本実施形態では、ニップル挿入孔23の内周面23aに等間隔で可動ピン27を一個、固定ピン25を二個設けている。ニップル10をソケット20から取り外すときに、固定ピン25または可動ピン27のいずれか一つが屈曲部15aに引っ掛かればよいため、各ピンの数は一個以上であれば、いくつ設けても構わない。   As shown in FIG. 3b, in this embodiment, one movable pin 27 and two fixed pins 25 are provided on the inner peripheral surface 23a of the nipple insertion hole 23 at equal intervals. When the nipple 10 is removed from the socket 20, any one of the fixed pin 25 and the movable pin 27 may be hooked on the bent portion 15a.

次に、本実施形態の管継手1の作用を説明する。ニップル10とソケット20を連結するには、まず、リフタ26の操作側端部26aを径方向内側に押して、可動ピン27をニップル挿入孔23の内周面23aから退避させる。次いで、固定ピン25をピン係合溝15に沿って進入させながらかつ、ニップル10とソケット20をピン係合溝15に沿った方向に回転させながら、ニップル10をソケット20のニップル挿入孔23に挿入する。なお、この途中でリフタ26を押している力を解除し、可動ピン27もピン係合溝15に沿わせていく。ニップル10の嵌合凹部16にソケット20の可動ピン27が到達すると、可動ピン27は嵌合凹部16に嵌合する。この状態になると、ニップル10のOリング14がソケット20の中間孔24の内周面24aに弾性的かつ液密的に密着し、管継手1の連結が完了する。   Next, the effect | action of the pipe joint 1 of this embodiment is demonstrated. In order to connect the nipple 10 and the socket 20, first, the operation side end portion 26 a of the lifter 26 is pushed radially inward to retract the movable pin 27 from the inner peripheral surface 23 a of the nipple insertion hole 23. Next, the nipple 10 is inserted into the nipple insertion hole 23 of the socket 20 while the fixing pin 25 is advanced along the pin engagement groove 15 and the nipple 10 and the socket 20 are rotated in the direction along the pin engagement groove 15. insert. In this process, the force pushing the lifter 26 is released, and the movable pin 27 moves along the pin engaging groove 15. When the movable pin 27 of the socket 20 reaches the fitting recess 16 of the nipple 10, the movable pin 27 is fitted into the fitting recess 16. In this state, the O-ring 14 of the nipple 10 comes into close contact with the inner peripheral surface 24a of the intermediate hole 24 of the socket 20 in an elastic and liquid-tight manner, and the connection of the pipe joint 1 is completed.

逆にソケット10からニップル20を外すときは、再びリフタ26の操作側端部26a径方向に押して、可動ピン27を嵌合凹部16から退避させ、各ピン25、27を各ピン係合溝15に沿った方向に回転させながら、ソケット20とニップル10とを相対的に離していく。このとき、配管内に圧力が残存していると、ソケット10とニップル20との密着状態が解除されると同時に配管内の圧力が配管外へ放出されることにより、その圧力に応じた力でニップル10とソケット20は互いに離れようとする。しかしながら、本発明では、固定ピン25および可動ピン27がピン係合溝15に設けられた第二屈曲部15bにそれぞれ引っ掛かり、ニップル10とソケット20は離間しない。配管内の圧力が抜けたら、各ピンが第二屈曲部15bに引っ掛かっている状態を外して、さらに各ピンを各ピン係合溝15に沿わせながらソケット20からニップル10を相対的に離していき、各ピン25、27が各係合溝15の開口から出ると、ソケット20からニップル10が取り外された状態となる。   On the contrary, when the nipple 20 is removed from the socket 10, it is pushed again in the radial direction of the operation side end portion 26 a of the lifter 26 to retract the movable pin 27 from the fitting recess 16, and each pin 25, 27 is moved to each pin engagement groove 15. The socket 20 and the nipple 10 are relatively separated from each other while being rotated in a direction along the direction. At this time, if the pressure remains in the pipe, the contact state between the socket 10 and the nipple 20 is released, and at the same time, the pressure in the pipe is released to the outside of the pipe with a force corresponding to the pressure. The nipple 10 and the socket 20 try to be separated from each other. However, in the present invention, the fixed pin 25 and the movable pin 27 are respectively caught on the second bent portion 15b provided in the pin engaging groove 15, and the nipple 10 and the socket 20 are not separated. When the pressure in the pipe is released, the state where each pin is hooked on the second bent portion 15 b is removed, and the nipple 10 is relatively separated from the socket 20 while keeping each pin along each pin engaging groove 15. When the pins 25 and 27 come out of the openings of the engagement grooves 15, the nipple 10 is removed from the socket 20.

本発明によれば、配管内に圧力が残存している状態でソケット20からニップル10を外そうとした場合、固定ピン25ならびに可動ピン27が第二屈曲部15bに一旦引っ掛かるため、一度に勢いよくソケット20とニップル10とが離間することがなく、この一次操作のときに配管内の圧力が抜け、常圧とすることができる。そして、次の実際のニップル10をソケット20から抜く二次操作のときは、常圧の状態で行うことになる。その結果、ソケット20とニップル10の取り外し作業を安全かつ容易に行うことができる。   According to the present invention, when the nipple 10 is to be removed from the socket 20 with pressure remaining in the pipe, the fixed pin 25 and the movable pin 27 are once hooked on the second bent portion 15b, so that momentum is generated at once. The socket 20 and the nipple 10 are not well separated from each other, and the pressure in the pipe is released during the primary operation, so that the normal pressure can be obtained. And in the secondary operation which pulls out the next actual nipple 10 from the socket 20, it will carry out in the state of a normal pressure. As a result, the removal work of the socket 20 and the nipple 10 can be performed safely and easily.

一実施形態の管継手を構成する各部品の斜視図である。It is a perspective view of each component which comprises the pipe joint of one Embodiment. (a)管継手のニップルを示した側面図、(b)小径筒部側から見たニップルの正面図である。(A) The side view which showed the nipple of the pipe joint, (b) The front view of the nipple seen from the small diameter cylinder part side. (a)ニップル挿入孔側から見たソケットの正面図、(b)管継手のソケットを示した側面図である。(A) The front view of the socket seen from the nipple insertion hole side, (b) The side view which showed the socket of the pipe joint. ニップルをソケットから取り外すときのピンの動作を示した図である。It is the figure which showed operation | movement of the pin when removing a nipple from a socket.

符号の説明Explanation of symbols

1…管継手
10…ニップル
14…Oリング(密着部)
15…ピン係合溝
15b…第二屈曲部(ピン係止部)
16…嵌合凹部
20…ソケット
23…ニップル挿入孔
23a…ニップル挿入孔の内周面
24…中間孔(密着部)
25…固定ピン
26…リフタ(ロック解除手段)
27…可動ピン
29…ばね(付勢部材)
DESCRIPTION OF SYMBOLS 1 ... Pipe joint 10 ... Nipple 14 ... O-ring (contact part)
15 ... Pin engaging groove 15b ... Second bent part (pin locking part)
16 ... Fitting recess 20 ... Socket 23 ... Nipple insertion hole 23a ... Inner peripheral surface of nipple insertion hole 24 ... Intermediate hole (adhesion part)
25 ... fixing pin 26 ... lifter (lock release means)
27 ... movable pin 29 ... spring (biasing member)

Claims (1)

円筒状のニップル挿入孔を有するソケットの前記ニップル挿入孔に、円筒状のニップルが着脱可能に挿入される管継手であって、
前記ソケットの前記ニップル挿入孔の内周面には、径方向内側に突出する固定ピンと、該内周面から径方向内側に対して進退自在、かつ付勢部材によって該内周面から進出するように付勢されている可動ピンとが設けられており、ソケットには、前記可動ピンをニップル挿入孔の内周面から退避させるロック解除手段が設けられており、
一方、前記ニップルの前記ソケットへの挿入側である一端部の外周面には、前記固定ピンおよび前記可動ピンがそれぞれ係合するピン係合溝が形成されており、このピン係合溝は、前記挿入側の端面に開口するとともに該開口から一方の方向にほぼ沿って延びてから、ピン係止部となる屈曲部を経て、一方の周方向側とは反対側の他方の周方向側に蛇行しており、その蛇行した部分には前記可動ピンが嵌合する嵌合凹部が形成されているピン係合溝が形成されており、
さらに前記ソケットの内周面および前記ニップルの先端部または外周面には、ニップルの前記嵌合凹部にソケットの前記可動ピンが到達した状態で互いに液密的に密着する密着部がそれぞれ設けられており、
前記固定ピンと前記可動ピンが前記ピン係止部に係止しているときに、前記ソケット側の前記密着部に対する前記ニップル側の密着部の密着状態が解除され、かつ、該ソケットと該ニップルとは離間しない状態となることを特徴とする管継手。
A pipe joint in which a cylindrical nipple is detachably inserted into the nipple insertion hole of a socket having a cylindrical nipple insertion hole,
A fixing pin that protrudes radially inward on the inner peripheral surface of the nipple insertion hole of the socket, and is movable forward and backward from the inner peripheral surface in the radial direction, and is advanced from the inner peripheral surface by a biasing member. The socket is provided with a movable pin that is biased, and the socket is provided with unlocking means for retracting the movable pin from the inner peripheral surface of the nipple insertion hole,
On the other hand, on the outer peripheral surface of the one end portion on the insertion side of the nipple into the socket, pin engagement grooves for engaging the fixed pin and the movable pin are formed. It opens in the end surface on the insertion side and extends substantially along one direction from the opening, and then passes through a bent portion serving as a pin locking portion to the other circumferential side opposite to one circumferential side. A meandering portion is formed with a pin engaging groove in which a fitting recess into which the movable pin is fitted is formed in the meandering portion ,
Furthermore, the inner peripheral surface of the socket and the tip or outer peripheral surface of the nipple are provided with close contact portions that are in liquid-tight contact with each other when the movable pin of the socket reaches the fitting recess of the nipple. And
When the fixed pin and the movable pin are locked to the pin locking portion, the close contact state of the close contact portion on the nipple side with respect to the close contact portion on the socket side is released, and the socket and the nipple Is a pipe joint characterized by not being separated .
JP2007120139A 2007-04-27 2007-04-27 Pipe fitting Active JP4949119B2 (en)

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TW200844356A (en) 2008-11-16
TWI400404B (en) 2013-07-01

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