JP2009210101A - Gas cock - Google Patents

Gas cock Download PDF

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JP2009210101A
JP2009210101A JP2008056413A JP2008056413A JP2009210101A JP 2009210101 A JP2009210101 A JP 2009210101A JP 2008056413 A JP2008056413 A JP 2008056413A JP 2008056413 A JP2008056413 A JP 2008056413A JP 2009210101 A JP2009210101 A JP 2009210101A
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main valve
gas
hole
valve
seal member
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JP5093894B2 (en
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Yoshiaki Umezawa
良昭 梅沢
Ryoichi Hirano
亮一 平野
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Koyo Sangyo Co Ltd
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Koyo Sangyo Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To use a biasing means having a weak bias force as a biasing means to bias a main valve to a close position. <P>SOLUTION: A gas cock A comprises the main valve 2 slidable between a close position and an open position in the gas outlet hole 1b and a first coil spring 4A to bias the main valve 2 toward the close position, and an annular groove 1i is formed on the inner circumference face of the gas outlet hole 1b. This annular groove 1i is arranged to the downstream side from an opening part 1g of a gas inlet hole 1a. The annular groove 1i is equipped with the seal member 6. An outer diameter of a small size part 2B of the main valve 2 which contacts the seal member 6 slidably is kept to constant. The communication holes 2b, 2c to penetrate a peripheral wall part of the main valve 2 of a cylindrical shape is formed in the same. The communication hole 2b, 2c is located in the down stream side from the seal member 6 when the main valve 2 is located in a close position and intercepted to the gas inlet hole 1a. The communication hole 2b, 2c is positioned in the upper stream side from the seal member 6and communicates with the gas inlet hole 1a when the main valve 2 is positioned in the open position. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

この発明は、栓本体にソケットを接続すると閉状態から開状態に切り換わるガス栓に関する。   The present invention relates to a gas plug that switches from a closed state to an open state when a socket is connected to the plug body.

一般に、この種のガス栓は、下記特許文献1に記載されているように、内部にガス流入孔及び内周面にガス流入孔が開口するガス流出孔が形成された栓本体と、ガス流出孔内に設けられた主弁、副弁、第1付勢手段及び第2付勢手段とを有している。主弁は、閉位置とこの閉位置からガス流出孔の上流側に向かって所定距離だけ離間した開位置との間を摺動可能である。副弁は、ガス流出孔の下流側の端部に形成された弁座に着座した着座位置と、弁座から上流側へ所定距離だけ離間した離間位置との間を移動可能である。副弁は、通常は、主弁と一緒に移動するようになっており、主弁が閉位置に位置すると副弁が着座位置に位置し、主弁が開位置に位置すると副弁が離間位置に位置する。   In general, as described in Patent Document 1 below, this type of gas stopper has a gas main body in which a gas inflow hole is formed and a gas outflow hole having a gas inflow hole formed in an inner peripheral surface is formed. It has a main valve, a sub valve, a first urging means and a second urging means provided in the hole. The main valve is slidable between a closed position and an open position separated from the closed position by a predetermined distance toward the upstream side of the gas outflow hole. The sub-valve is movable between a seating position seated on a valve seat formed at the downstream end of the gas outflow hole and a separated position spaced a predetermined distance from the valve seat to the upstream side. The sub-valve usually moves together with the main valve.When the main valve is in the closed position, the sub-valve is in the seating position, and when the main valve is in the open position, the sub-valve is in the separated position. Located in.

第1付勢手段は、主弁を開位置側から閉位置に向かって付勢するとともに、副弁を主弁を介して離間位置側から着座位置に向かって付勢している。一方、第2付勢手段は、副弁を離間位置側から着座位置側へ向かって付勢している。ガス栓にソケットが接続されていない状態では、第1付勢手段によって主弁が閉位置に位置させられるとともに、副弁が弁座に着座させられる。ガス栓にソケットが接続されると、ソケットに設けられた押しロッドにより、副弁及び主弁が第1付勢手段の付勢力に抗して離間位置及び開位置までそれぞれ移動させられる。ガス栓からソケットを外したときに、何らかの事故によって主弁が開位置と閉位置との間において停止した場合には、副弁が第2付勢手段によって着座位置に移動させられる。   The first urging means urges the main valve from the open position side toward the closed position, and urges the sub valve from the separated position side toward the seating position via the main valve. On the other hand, the second urging means urges the auxiliary valve from the separated position side toward the seating position side. In a state where the socket is not connected to the gas stopper, the main valve is positioned at the closed position by the first biasing means, and the sub valve is seated on the valve seat. When the socket is connected to the gas plug, the auxiliary valve and the main valve are moved to the separated position and the open position against the urging force of the first urging means by the push rod provided on the socket. If the main valve stops between the open position and the closed position due to some accident when the socket is removed from the gas stopper, the sub valve is moved to the seating position by the second urging means.

主弁の外周面には、環状溝が形成されており、この環状溝には弾性材からなるシール部材が装着されている。シール部材は、主弁が閉位置に位置しているときには、ガス流出孔の内周面と主弁の外周面との間を全周にわたって封止する。この結果、ガス栓が閉状態になる。その一方、主弁が開位置に位置しているときには、シール部材がガス流出孔の上流側の内周面に形成された拡径部に入り込み、シール部材の外周部がガス流出孔の内周面から内側に離間する。この結果、ガス流出孔の内周面と主弁の外周面との間が全周にわたって開放され、ガス栓が開状態になる。   An annular groove is formed on the outer peripheral surface of the main valve, and a seal member made of an elastic material is attached to the annular groove. The seal member seals between the inner peripheral surface of the gas outflow hole and the outer peripheral surface of the main valve over the entire circumference when the main valve is located at the closed position. As a result, the gas stopper is closed. On the other hand, when the main valve is in the open position, the seal member enters the enlarged diameter portion formed on the inner peripheral surface on the upstream side of the gas outflow hole, and the outer peripheral portion of the seal member is the inner periphery of the gas outflow hole. Separate from the surface inward. As a result, the space between the inner peripheral surface of the gas outflow hole and the outer peripheral surface of the main valve is opened over the entire periphery, and the gas stopper is opened.

実公平4-22157号公報Japanese Utility Model Publication No. 4-22157

上記従来のガス栓において、主弁が開位置に位置しているとき、つまりシール部材が拡径部内に位置しているときには、シール部材がそれ自体の弾性によって拡径している。したがって、主弁が開位置から閉位置まで移動するときには、シール部材が拡径部の内周面とそれより下流側のガス流出孔の内周面との間に形成される段差部に全周にわたって突き当たる。第1付勢手段は、段差部に突き当たったシール部材を縮径させつつ主弁を閉位置側へ移動させなければならない。このため、第1付勢手段の付勢力を大きくする必要があった。ところが、第1付勢手段の付勢力を大きくすると、ソケットをガス栓に接続する際には、ソケットを第1付勢手段の付勢力に抗して大きな力で押さなければならないという問題があった。   In the conventional gas plug, when the main valve is located at the open position, that is, when the seal member is located within the enlarged diameter portion, the diameter of the seal member is increased by its own elasticity. Therefore, when the main valve moves from the open position to the closed position, the seal member is entirely surrounded by the step formed between the inner peripheral surface of the enlarged diameter portion and the inner peripheral surface of the gas outflow hole on the downstream side. It strikes over. The first urging means must move the main valve to the closed position side while reducing the diameter of the seal member that has hit the stepped portion. For this reason, it is necessary to increase the urging force of the first urging means. However, when the urging force of the first urging means is increased, there is a problem that when the socket is connected to the gas stopper, the socket must be pressed with a large force against the urging force of the first urging means. It was.

この発明は、上記の問題を解決するために、内部に、ガス流入孔及び内周面に上記ガス流入孔が開口するガス流出孔が形成された栓本体と、上記ガス流出孔に閉位置とこの閉位置より所定距離側だけ上流側に離れた開位置との間を摺動可能に設けられた主弁と、この主弁より上流側の上記ガス流出孔内に収容され、上記主弁を上記開位置側から上記閉位置に向かって付勢する第1付勢手段と、上記主弁より下流側の上記ガス流出孔内に、上記ガス流出孔の下流側の端部に形成された弁座に着座した着座位置と上記弁座から所定距離だけ上流側に離間した離間位置との間を移動可能に設けられた副弁と、この副弁と上記主弁との間の上記ガス流出孔内に設けられ、上記副弁を上記離間位置側から上記着座位置に向かって付勢する第2付勢手段と、上記流出孔の内周面と上記主弁の外周面との間に設けられた弾性材からなるリング状のシール部材とを備え、上記主弁が上記閉位置に位置しているときには、上記ガス流出孔の内周面における上記ガス流入孔の開口部より下流側に位置する上記ガス流出孔の内周面と上記主弁の外周面との間が上記シール部材によって全周にわたって封止されるガス栓において、上記流入孔の開口部より下流側に位置する上記ガス流出孔の内周面に環状溝が形成され、この環状溝に上記シール部材が上記ガス流出孔の長手方向へほぼ移動不能に装着され、上記主弁が上記閉位置と上記開位置との間に位置しているときに上記シール部材に接触する上記主弁の外周面が一定の外径をもって形成され、上記主弁には、一端が上記主弁の外周面に開放され、他端が上記主弁の上流側の端面に開放されたガス通路が形成され、このガス通路の一端開放部は、上記主弁が上記閉位置に位置しているときには上記シール部材より上記ガス流出孔の下流側に位置し、上記主弁が上記開位置に位置しているときには上記シール部材より上記ガス流出孔の上流側に位置して上記ガス流入孔の開口部に連通するように配置されていることを特徴としている。
この場合、上記主弁が、上流側の端部が開口し、上記ガス流入孔の開口部より下流側の部分が閉じられた筒体として形成され、上記主弁の上記閉じられた部分より下流側に位置する周壁部には当該周壁部を貫通する連通孔が形成され、この連通孔と上記主弁の内部とによって上記ガス通路が構成され、上記主弁の周壁部の外周面における上記連通孔の開口部が上記開放部とされていることが望ましい。
上記主弁が上記開位置に位置しているときに、上記シール部材が上記主弁の外周面に全周にわたって接触させられていることが望ましい。
In order to solve the above-mentioned problem, the present invention includes a plug body in which a gas inflow hole and a gas outflow hole in which the gas inflow hole opens on an inner peripheral surface are formed, and a closed position in the gas outflow hole. A main valve that is slidable between an open position separated from the closed position by a predetermined distance upstream, and is accommodated in the gas outlet hole upstream of the main valve. A first urging means for urging from the open position side toward the closed position; and a valve formed at an end portion on the downstream side of the gas outflow hole in the gas outflow hole on the downstream side of the main valve. A secondary valve movably provided between a seated position seated on the seat and a spaced position spaced upstream from the valve seat by a predetermined distance, and the gas outflow hole between the secondary valve and the main valve A second urging means provided in the urging means for urging the auxiliary valve from the separated position side toward the seating position; A ring-shaped sealing member made of an elastic material provided between the inner peripheral surface of the outflow hole and the outer peripheral surface of the main valve, and when the main valve is in the closed position, Between the inner peripheral surface of the gas outflow hole located on the downstream side of the opening of the gas inflow hole on the inner peripheral surface of the outflow hole and the outer peripheral surface of the main valve is sealed over the entire circumference by the seal member. In the gas stopper, an annular groove is formed on the inner peripheral surface of the gas outflow hole located downstream from the opening of the inflow hole, and the seal member is substantially immovable in the longitudinal direction of the gas outflow hole. When the main valve is located between the closed position and the open position, an outer peripheral surface of the main valve that contacts the seal member is formed with a constant outer diameter. Has one end open to the outer peripheral surface of the main valve and the other end An open gas passage is formed on the upstream end face of the main valve, and one end open portion of the gas passage is downstream of the gas outflow hole from the seal member when the main valve is located at the closed position. When the main valve is located at the open position, it is located on the upstream side of the gas outflow hole from the seal member so as to communicate with the opening of the gas inflow hole. It is characterized by.
In this case, the main valve is formed as a cylindrical body having an open end on the upstream side and a closed portion on the downstream side of the opening of the gas inflow hole, and is downstream of the closed portion of the main valve. A communication hole penetrating the peripheral wall portion is formed in the peripheral wall portion located on the side, and the gas passage is configured by the communication hole and the inside of the main valve, and the communication on the outer peripheral surface of the peripheral wall portion of the main valve is formed. It is desirable that the opening of the hole is the open portion.
When the main valve is located in the open position, it is desirable that the seal member is in contact with the outer peripheral surface of the main valve over the entire circumference.

上記特徴構成を有するこの発明によれば、シール部材がガス流出孔に設けられているから、シール部材が拡径することはない。しかも、主弁が閉位置と開位置との間に位置しているときにシール部材に接触する主弁の外周面の外径が一定になっているから、主弁が閉位置と開位置との間を移動するときにシール部材全体が縮径することがない。したがって、シール部材は、一定の内径を維持した状態で主弁の外周面上を相対的に摺動する。つまり、シール部材が縮径してその全体が段差面に突き当たるような事態が発生することがない。よって、主弁は比較的弱い力で摺動させることができ、それに対応して第1付勢手段の付勢力を比較的弱く設定することができる。   According to the present invention having the above characteristic configuration, since the seal member is provided in the gas outflow hole, the diameter of the seal member does not increase. Moreover, since the outer diameter of the outer peripheral surface of the main valve that contacts the seal member is constant when the main valve is located between the closed position and the open position, the main valve is in the closed position and the open position. The entire sealing member is not reduced in diameter when moving between the two. Therefore, the seal member relatively slides on the outer peripheral surface of the main valve while maintaining a constant inner diameter. That is, a situation in which the diameter of the seal member is reduced and the whole of the seal member hits the step surface does not occur. Therefore, the main valve can be slid with a relatively weak force, and the urging force of the first urging means can be set relatively weak accordingly.

以下、この発明を実施するための最良の形態を、図面を参照して説明する。
図1〜図3は、この発明に係るガス栓の一実施の形態を示す。この実施の形態のガス栓Aは、栓本体1、主弁2、副弁3、第1コイルばね(第1付勢手段)4A、第2コイルばね4B、第3コイルばね(第2付勢手段)5、及びシール部材6を主な構成要素としている。
The best mode for carrying out the present invention will be described below with reference to the drawings.
1 to 3 show an embodiment of a gas stopper according to the present invention. The gas stopper A of this embodiment includes a stopper body 1, a main valve 2, a sub valve 3, a first coil spring (first biasing means) 4A, a second coil spring 4B, and a third coil spring (second biasing force). Means) 5 and seal member 6 are the main components.

栓本体1は、長手方向を図1及び図2の上下方向(以下、上下左右は、図1及び図2における上下左右を意味するものとする。)に向けて配置された筒状の基部1Aと、この基部1Aの上端部に一体に設けられた筒部1Bとを有している。   The plug body 1 has a cylindrical base portion 1A arranged with its longitudinal direction oriented in the vertical direction of FIGS. 1 and 2 (hereinafter, the vertical and horizontal directions mean the vertical and horizontal directions in FIGS. 1 and 2). And a cylindrical portion 1B provided integrally with the upper end portion of the base portion 1A.

基部1Aの内部がガス流入孔1aになっている。このガス流入孔1aは、断面円形をなしている。勿論、他の断面形状であってもよい。ガス流入孔1aの内部には、ガス流入孔1a内のガスの流量が過剰になったときにガス流入孔1aを閉じる過流出防止弁11、及び閉状態になった過流出防止弁11を開状態に戻すリセット片12が設けられている。過流出防止弁11及びリセット片12は、周知のものである。しかも、この発明との関連性も低い。そこで、過流出防止弁11及びリセット片12についての詳細な説明は省略する。   The inside of the base 1A is a gas inflow hole 1a. This gas inflow hole 1a has a circular cross section. Of course, other cross-sectional shapes may be used. Inside the gas inflow hole 1a, an overflow prevention valve 11 for closing the gas inflow hole 1a when the gas flow rate in the gas inflow hole 1a becomes excessive, and an overflow prevention valve 11 in a closed state are opened. A reset piece 12 for returning the state is provided. The overflow prevention valve 11 and the reset piece 12 are well known. Moreover, the relevance to this invention is low. Therefore, detailed description of the overflow prevention valve 11 and the reset piece 12 is omitted.

基部1Aの下端部には、接続ナット13がシール状態で回動可能に設けられている。接続ナット13には、一次側ガス管、つまりガス供給管(図示せず)が螺合固定される。このガス供給管からガス流入孔1aにガスが供給される。ガス供給管は、基部1Aの下端部に直接接続してもよい。   A connection nut 13 is rotatably provided in a sealed state at the lower end of the base 1A. A primary gas pipe, that is, a gas supply pipe (not shown) is screwed and fixed to the connection nut 13. Gas is supplied from the gas supply pipe to the gas inflow hole 1a. The gas supply pipe may be directly connected to the lower end of the base 1A.

筒部1Bは、その長手方向を左右方向(基部1Aの長手方向と直交する方向)に向けて配置されている。筒部1Bは、基部1Aに対して傾斜させてもよい。筒部1Bの内部がガス流出孔1bになっている。ガス流出孔1bは、断面円形をなしており、筒部1Bをその右端面からから左端面まで貫通している。   The cylindrical portion 1B is arranged with its longitudinal direction directed in the left-right direction (a direction perpendicular to the longitudinal direction of the base portion 1A). The tube portion 1B may be inclined with respect to the base portion 1A. The inside of the cylinder portion 1B is a gas outflow hole 1b. The gas outflow hole 1b has a circular cross section and penetrates the cylindrical portion 1B from the right end surface to the left end surface.

ガス流出孔1bは、右端から左端に向かって順次形成されたねじ孔部1cと、このねじ孔部1cより若干小径である大径孔部1dと、この大径孔部1dより小径である小径孔部1eと、この小径孔部1eの先端部に形成されたテーパ状の弁座1fとを有している。ねじ孔部1c、大径孔部1d、小径孔部1e及び弁座1fは、互いに同芯に配置されている。大径孔部1dと小径孔部1eとは、互いに同一径にしてもよい。   The gas outflow hole 1b includes a screw hole portion 1c formed in order from the right end to the left end, a large diameter hole portion 1d having a slightly smaller diameter than the screw hole portion 1c, and a small diameter smaller than the large diameter hole portion 1d. It has a hole 1e and a tapered valve seat 1f formed at the tip of the small diameter hole 1e. The screw hole portion 1c, the large diameter hole portion 1d, the small diameter hole portion 1e, and the valve seat 1f are arranged concentrically with each other. The large diameter hole 1d and the small diameter hole 1e may have the same diameter.

ねじ孔部1cには、蓋体7が螺合固定されている。この蓋体7によってガス流出孔1bの右端部(上流側の端部)が閉じられている。大径孔部1dの内周面の下部には、ガス流入孔1aの上端部(下流側の端部)が開口している。この開口部1gを介してガス流入孔1aがガス流出孔1bと連通し、ガス流入孔1aからガス流出孔1bにガスが流入するようになっている。大径孔部1dの内周面の上部には、大径孔部1dに沿って延びる突条1hが形成されている。   The lid 7 is screwed and fixed to the screw hole 1c. The lid 7 closes the right end (upstream end) of the gas outflow hole 1b. An upper end portion (downstream end portion) of the gas inflow hole 1a opens at a lower portion of the inner peripheral surface of the large diameter hole portion 1d. The gas inflow hole 1a communicates with the gas outflow hole 1b through the opening 1g, and gas flows into the gas outflow hole 1b from the gas inflow hole 1a. A protrusion 1h extending along the large-diameter hole 1d is formed on the upper portion of the inner peripheral surface of the large-diameter hole 1d.

小径孔部1eの内周面には、環状溝1iが形成されている。この環状溝1iは、小径孔部1eの上流側の端部に配置されている。したがって、環状溝1iは、ガス流入孔1aの開口部1gに近接しているが、開口部1gより下流側に位置している。   An annular groove 1i is formed on the inner peripheral surface of the small diameter hole 1e. The annular groove 1i is disposed at the upstream end of the small diameter hole 1e. Accordingly, the annular groove 1i is close to the opening 1g of the gas inflow hole 1a, but is located downstream of the opening 1g.

環状溝1iには、リング状をなすシール部材6が装着されている。シール部材6は、ゴム等の弾性材からなるものであり、例えば断面円形のOリング又は断面X字状のXリングがシール部材6として採用されている。シール部材6が自然状態になっているとき、つまりシール部材6に外力が作用していないときには、シール部材6の外径が環状溝1iの底面の直径より大径になっている。したがって、シール部材6は、縮径した状態で環状溝1iに装着されており、それ自体の弾性によって環状溝1iの底面に押圧接触させられている。シール部材6の内径は、小径孔部1eの内径より小径になっている。したがって、後述する主弁2がガス流出孔1bに挿入されない状態では、シール部材6の内周部が小径孔部1eの内周面から内側に突出している。勿論、主弁2がガス流出孔1bに挿入されると、シール部材6の内周部が主弁2の外周面に押圧接触する。シール部材6の外周部が環状溝1iの底面に押圧接触するとともに、内周部が主弁2の外周面に接触することにより、小径孔部1eの内周面と主弁2の外周面との間が気密に封止されている。また、シール部材6の素材が環状溝1iの底面及び主弁2の外周面によって押し潰された状態では、シール部材6の素材の左右両側部が環状溝1iの左右両側面に押圧接触し、その結果シール部材6が左右方向へ移動不能になっている。ただし、シール部材6は、主弁2が後述する閉位置に位置したときに、環状溝1iの底面(小径孔部1eの底面)と主弁2の外周面との間を気密に封止することができるものである限り、僅かな距離であれば左右方向(ガス流出孔1bの長手方向)へ移動可能であってもよい。つまり、シール部材6は、環状溝1iの長手方向に対してほぼ位置固定されていればよい。   A ring-shaped seal member 6 is attached to the annular groove 1i. The seal member 6 is made of an elastic material such as rubber. For example, an O-ring having a circular cross section or an X ring having an X-shaped cross section is employed as the seal member 6. When the seal member 6 is in a natural state, that is, when no external force is acting on the seal member 6, the outer diameter of the seal member 6 is larger than the diameter of the bottom surface of the annular groove 1i. Accordingly, the seal member 6 is mounted in the annular groove 1i in a reduced diameter state, and is pressed against the bottom surface of the annular groove 1i by its own elasticity. The inner diameter of the seal member 6 is smaller than the inner diameter of the small diameter hole 1e. Therefore, in a state where the main valve 2 described later is not inserted into the gas outflow hole 1b, the inner peripheral portion of the seal member 6 protrudes inward from the inner peripheral surface of the small diameter hole portion 1e. Of course, when the main valve 2 is inserted into the gas outflow hole 1 b, the inner peripheral portion of the seal member 6 is in press contact with the outer peripheral surface of the main valve 2. While the outer peripheral portion of the seal member 6 is in press contact with the bottom surface of the annular groove 1 i and the inner peripheral portion is in contact with the outer peripheral surface of the main valve 2, the inner peripheral surface of the small diameter hole portion 1 e and the outer peripheral surface of the main valve 2 are The space is hermetically sealed. Further, in a state where the material of the seal member 6 is crushed by the bottom surface of the annular groove 1i and the outer peripheral surface of the main valve 2, the left and right sides of the material of the seal member 6 are in press contact with the left and right side surfaces of the annular groove 1i. As a result, the seal member 6 cannot move in the left-right direction. However, the seal member 6 hermetically seals between the bottom surface of the annular groove 1i (the bottom surface of the small diameter hole portion 1e) and the outer peripheral surface of the main valve 2 when the main valve 2 is positioned at a closed position described later. As long as it is possible, it may be movable in the left-right direction (longitudinal direction of the gas outflow hole 1b) as long as it is a short distance. That is, the seal member 6 only needs to be substantially fixed in position with respect to the longitudinal direction of the annular groove 1i.

ガス流出孔1bには、主弁2が摺動可能に挿入されている。主弁2は、図1に示す閉位置と、この閉位置から右側(ガス流出孔1bの上流側)へ所定距離だけ離間した図2に示す開位置との間を摺動可能になっている。主弁2は、両端が開口した円筒として形成されており、大径部2Aと、この大径部2Aの左端部(下流側の端部)に一体に形成された小径部2Bとを有している。大径部2A及び小径部2Bは、いずれも一定の外径を有しており、互いに同芯に配置されている。なお、大径孔部1dと小径孔部1eとが互いに同一径とされるときには、これに対応して大径部2A及び小径部2Bも同一径とされる。   The main valve 2 is slidably inserted into the gas outflow hole 1b. The main valve 2 is slidable between a closed position shown in FIG. 1 and an open position shown in FIG. 2 spaced from the closed position by a predetermined distance to the right side (upstream side of the gas outflow hole 1b). . The main valve 2 is formed as a cylinder whose both ends are open, and has a large diameter portion 2A and a small diameter portion 2B formed integrally with the left end portion (downstream end portion) of the large diameter portion 2A. ing. Both the large diameter portion 2A and the small diameter portion 2B have a constant outer diameter and are arranged concentrically with each other. When the large diameter hole 1d and the small diameter hole 1e have the same diameter, the large diameter part 2A and the small diameter part 2B have the same diameter.

大径部2Aは、大径孔部1dとほぼ同一外径を有しており、大径孔部1dに摺動可能に挿入されている。大径部2Aの外周面の上部には、大径部2Aの軸線方向に延びるガイド溝2a(図3参照)が形成されている。このガイド溝2aには、上記突条1hがその長手方向へ相対移動可能に挿入されている。これにより、主弁2が回動不能になっている。つまり、主弁2の周方向における位置決めがなされている。   The large diameter portion 2A has substantially the same outer diameter as the large diameter hole portion 1d, and is slidably inserted into the large diameter hole portion 1d. A guide groove 2a (see FIG. 3) extending in the axial direction of the large diameter portion 2A is formed in the upper portion of the outer peripheral surface of the large diameter portion 2A. The protrusion 1h is inserted into the guide groove 2a so as to be relatively movable in the longitudinal direction. Thereby, the main valve 2 cannot be rotated. That is, the positioning of the main valve 2 in the circumferential direction is performed.

小径部2Bは、小径孔部1eとほぼ同一の外径を有しており、小径孔部1eに摺動可能に挿入されている。ただし、小径部2Bの大径部2A側の端部は、少なくとも主弁2が閉位置に位置しているときには、大径孔部1d内に入り込んでいる。この結果、図2に示すように、大径孔部1dの内周面と小径部2Bの外周面との間に環状の隙間Sが形成されている。勿論、大径孔部1d及び小径孔部1eの内径が同一径とされるときには、隙間Sが形成されことがない。小径部2Bの外周面には、常時、シール部材6の内周部が相対摺動可能に接触している。換言すれば、主弁2が閉位置と開位置との間のいずれの位置に位置しているときにも、シール部材6が小径部2Bの外周面に摺動可能に接触することができるように、小径部2Bの長さが設定されているのである。   The small diameter portion 2B has substantially the same outer diameter as the small diameter hole portion 1e, and is slidably inserted into the small diameter hole portion 1e. However, the end portion on the large diameter portion 2A side of the small diameter portion 2B enters the large diameter hole portion 1d at least when the main valve 2 is located at the closed position. As a result, as shown in FIG. 2, an annular gap S is formed between the inner peripheral surface of the large-diameter hole portion 1d and the outer peripheral surface of the small-diameter portion 2B. Of course, the gap S is not formed when the inner diameters of the large-diameter hole 1d and the small-diameter hole 1e are the same. The inner peripheral portion of the seal member 6 is always in contact with the outer peripheral surface of the small-diameter portion 2B so as to be capable of relative sliding. In other words, the seal member 6 can slidably contact the outer peripheral surface of the small-diameter portion 2B when the main valve 2 is located at any position between the closed position and the open position. In addition, the length of the small diameter portion 2B is set.

小径部2Bの周壁部の下部及び上部には、周壁部をその径方向に貫通する連通孔2b,2cがそれぞれ形成されている。下側に配置された連通孔2bは、図1に示すように、主弁2が閉位置に位置しているときにはシール部材6より左側(ガス流出孔2bの下流側)に位置し、図2に示すように、主弁2が開位置に位置しているときにはシール部材6より右側に位置するように配置されている。しかも、連通孔2bは、主弁2が開位置に位置しているときには、少なくとも一部がガス流入孔1aの開口部1gと対向し、上記隙間Sを介してガス流入孔1aと連通している。連通孔2bは、主弁2が閉位置に位置しているときにはシール部材6より左側に位置し、かつ主弁2が開位置に位置しているときにガス流入孔1aと連通することができる限り、主弁2が開位置に位置しているときに、連通孔2bの下流側の一部がシール部材6とガス流出孔1bの長手方向において同一位置に位置していてもよく、シール部材6より下流側に位置していてもよい。なお、大径孔部1dの内周面と小径部2Bの外周面との間に環状の隙間Sが形成されない場合には、連通孔2bがガス流入孔1aの開口部1gと直接連通する。   In the lower part and the upper part of the peripheral wall part of the small-diameter part 2B, communication holes 2b and 2c penetrating the peripheral wall part in the radial direction are formed. As shown in FIG. 1, the communication hole 2b arranged on the lower side is located on the left side (downstream side of the gas outflow hole 2b) from the seal member 6 when the main valve 2 is located at the closed position. As shown in FIG. 2, the main valve 2 is disposed on the right side of the seal member 6 when the main valve 2 is in the open position. Moreover, when the main valve 2 is in the open position, the communication hole 2b is at least partially opposed to the opening 1g of the gas inflow hole 1a and communicates with the gas inflow hole 1a through the gap S. Yes. The communication hole 2b is located on the left side of the seal member 6 when the main valve 2 is located at the closed position, and can communicate with the gas inflow hole 1a when the main valve 2 is located at the open position. As long as the main valve 2 is located at the open position, a part of the downstream side of the communication hole 2b may be located at the same position in the longitudinal direction of the seal member 6 and the gas outflow hole 1b. It may be located downstream of 6. When the annular gap S is not formed between the inner peripheral surface of the large diameter hole 1d and the outer peripheral surface of the small diameter portion 2B, the communication hole 2b communicates directly with the opening 1g of the gas inflow hole 1a.

上側に配置された連通孔2cは、連通孔2bに対して小径部2Bの径方向へ180°離間して配置されている点を除き、連通孔2bと同様に構成されている。つまり、連通孔2cは、連通孔2bと同一形状、同一寸法を有し、ガス流出孔1bの長手方向においては連通孔2bと同一位置に配置されている。したがって、連通孔2cは、主弁2が開位置に位置しているときには、隙間Sを介してガス流通孔1aに連通する。これから明らかなように、隙間Sが形成される場合には、連通孔2bについてもガス流入孔1aの開口部1gから周方向へ離間させてもよい。   The communication hole 2c disposed on the upper side is configured in the same manner as the communication hole 2b except that the communication hole 2c is disposed 180 degrees away from the communication hole 2b in the radial direction of the small diameter portion 2B. That is, the communication hole 2c has the same shape and the same dimensions as the communication hole 2b, and is disposed at the same position as the communication hole 2b in the longitudinal direction of the gas outflow hole 1b. Accordingly, the communication hole 2c communicates with the gas flow hole 1a through the gap S when the main valve 2 is located at the open position. As is clear from this, when the gap S is formed, the communication hole 2b may also be spaced apart from the opening 1g of the gas inflow hole 1a in the circumferential direction.

上記のように、主弁2が開位置に位置すると、ガス流入孔1a内のガスが、まず環状の隙間Sに流入する。そして、隙間Sから連通孔2b,2cを通って主弁2の内部に入り込む。主弁2に入り込んだガスは、主弁2の左端開口部(上流側の開口部)から主弁2より下流側に位置するガス流出孔1b内に流入する。これから明らかなように、連通孔2b,2c及び主弁2の内部により、主弁2が開位置に位置したときに、ガス流入孔1aとガス流出孔1bとを連通させるガス通路が構成されている。ガスの流量を十分に確保するために、二つの連通孔2b,2cが形成されているが、いずれか一方だけで十分なガスの流量を確保することができる場合には、連通孔2b,2cのうちの一方だけを形成するようにしてもよい。ただし、隙間Sが形成されない場合には、連通孔2bだけが形成される。   As described above, when the main valve 2 is located at the open position, the gas in the gas inflow hole 1a first flows into the annular gap S. Then, the air enters the main valve 2 from the gap S through the communication holes 2b and 2c. The gas that has entered the main valve 2 flows from the left end opening (upstream opening) of the main valve 2 into the gas outflow hole 1b located on the downstream side of the main valve 2. As is apparent from this, a gas passage that connects the gas inflow hole 1a and the gas outflow hole 1b when the main valve 2 is located in the open position is formed by the communication holes 2b and 2c and the inside of the main valve 2. Yes. In order to ensure a sufficient gas flow rate, two communication holes 2b and 2c are formed. However, if only one of them can ensure a sufficient gas flow rate, the communication holes 2b and 2c are provided. Only one of them may be formed. However, when the gap S is not formed, only the communication hole 2b is formed.

小径部2Bの内部には、隔壁部2dが形成されている。この隔壁部2dにより、主弁2の内部が右側部分(上流側部分)と左側部分(下流側部分)とに遮断状態で区分されている。隔壁部2dは、連通孔2b,2cより右側(ガス流出孔1bの上流側)に配置されている。したがって、連通孔2b,2cは、左側部分に連通しており、左側部分と連通孔2b、2cとによってガス通路が構成されている。また、右側部分が左側部分に対して遮断されているので、主弁2が閉位置に位置しているときに、仮にガス流入孔1a内のガスが大径部2Aの外周面と大径孔部1dの内周面との間を通って主弁2より右側の流出孔1b内に入り込んだとしても、そのガスが主弁2内を通って主弁2より下流側の流出孔1b内に入り込むことがない。隔壁2dは、このような機能を有する限り、大径部2Aの内部に形成してもよく、大径部2Aの開口部に当該開口部を閉じる底部として形成してもよい。   A partition wall 2d is formed inside the small diameter portion 2B. The partition portion 2d divides the inside of the main valve 2 into a right side portion (upstream side portion) and a left side portion (downstream side portion) in a blocked state. The partition wall portion 2d is disposed on the right side (upstream side of the gas outflow hole 1b) from the communication holes 2b and 2c. Therefore, the communication holes 2b and 2c communicate with the left side portion, and a gas passage is configured by the left side portion and the communication holes 2b and 2c. Further, since the right side portion is cut off from the left side portion, when the main valve 2 is located at the closed position, the gas in the gas inflow hole 1a is temporarily separated from the outer peripheral surface of the large diameter portion 2A and the large diameter hole Even if the gas passes through the inner peripheral surface of the part 1d and enters the outflow hole 1b on the right side of the main valve 2, the gas passes through the main valve 2 and enters the outflow hole 1b on the downstream side of the main valve 2. There is no entry. As long as it has such a function, the partition 2d may be formed inside the large-diameter portion 2A, or may be formed as a bottom portion that closes the opening at the opening of the large-diameter portion 2A.

主弁2より下流側に位置するガス流出孔1bの内部には、副弁3が図1に示す着座位置と図2に示す離間位置との間を摺動可能に設けられている。副弁3の左端部には、弁部3aが形成されている。弁部3aは、副弁3が着座位置に位置すると、弁座1fに着座し、ガス流出孔1bを閉じる。その一方、副弁3が離間位置に位置すると、弁座1fから上流側に離間し、ガス流出孔1bを開く。   Inside the gas outflow hole 1b located on the downstream side of the main valve 2, a sub valve 3 is provided so as to be slidable between a seating position shown in FIG. 1 and a separation position shown in FIG. A valve portion 3 a is formed at the left end portion of the auxiliary valve 3. When the auxiliary valve 3 is located at the seating position, the valve portion 3a sits on the valve seat 1f and closes the gas outflow hole 1b. On the other hand, when the auxiliary valve 3 is located at the separation position, the auxiliary valve 3 is separated from the valve seat 1f to the upstream side, and the gas outflow hole 1b is opened.

副弁3の右端面は、主弁2の左端面に突き当たっている。これにより、通常時には、副弁3が主弁2と一緒に移動するようになっており、主弁2が閉位置に位置すると、副弁3が着座位置に位置して弁座1fに着座する。換言すれば、弁部3aが弁座1fに着座することにより、主弁2の閉位置が規定されている。   The right end surface of the auxiliary valve 3 is in contact with the left end surface of the main valve 2. As a result, the sub-valve 3 moves together with the main valve 2 at normal times. When the main valve 2 is located at the closed position, the sub-valve 3 is located at the seating position and is seated on the valve seat 1f. . In other words, when the valve portion 3a is seated on the valve seat 1f, the closed position of the main valve 2 is defined.

ガス流出孔1bの下流側端部が開口する筒部1Bの左端部外周面には、日本工業規格(JIS S 2120)で規定された迅速継手のプラグ部1jが形成されている。このプラグ部1jにソケット(図示せず)が接続されると、ソケットに設けられた押しロッドRによって副弁3が着座位置から離間位置まで移動させられる。すると、主弁2が副弁3を介して押しロッドRによってガス流入孔1bの下流側へ押され、閉位置から開位置まで移動させられる。   On the outer peripheral surface of the left end portion of the cylindrical portion 1B where the downstream end portion of the gas outflow hole 1b opens, a quick joint plug portion 1j defined by Japanese Industrial Standard (JIS S 2120) is formed. When a socket (not shown) is connected to the plug portion 1j, the auxiliary valve 3 is moved from the seating position to the separated position by the push rod R provided on the socket. Then, the main valve 2 is pushed to the downstream side of the gas inflow hole 1b by the push rod R through the sub valve 3, and is moved from the closed position to the open position.

主弁2より上流側のガス流出孔1b内には、第1コイルばね4A及び第2コイルばね4Bが収容されている。第1コイルばね4Aは、一端が蓋体7に突き当たり、他端が隔壁部2dに突き当たっている。そして、主弁2を常時開位置側から閉位置に向かって付勢するとともに、副弁3を主弁2を介して離間位置側から着座位置に向かって付勢している。したがって、プラグ部1jにソケットが接続されていない状態では、第1コイルばね4Aにより、主弁2が閉位置に位置させられるとともに、副弁3が着座位置に位置させられている。第2コイルばね4Bは、主弁2が閉位置から開位置側へ移動してその所定距離だけ手前の位置に達すると、主弁2を閉位置側へ付勢する。したがって、主弁2が開位置に位置しているときには、主弁2は第1及び第2コイルばね4A,4Bによって閉位置側へ付勢される。これにより、ソケットをプラグ部1jから外したときに、主弁2が開位置において停止状態を維持するような事故を未然に防止するようになっている。   A first coil spring 4 </ b> A and a second coil spring 4 </ b> B are accommodated in the gas outflow hole 1 b upstream of the main valve 2. One end of the first coil spring 4A hits the lid 7 and the other end hits the partition wall 2d. The main valve 2 is normally urged from the open position side toward the closed position, and the auxiliary valve 3 is urged via the main valve 2 from the separated position side toward the seating position. Therefore, in a state where the socket is not connected to the plug portion 1j, the main valve 2 is positioned at the closed position and the auxiliary valve 3 is positioned at the seating position by the first coil spring 4A. The second coil spring 4B biases the main valve 2 toward the closed position when the main valve 2 moves from the closed position to the open position and reaches a position closer to that position by a predetermined distance. Therefore, when the main valve 2 is in the open position, the main valve 2 is urged toward the closed position by the first and second coil springs 4A and 4B. As a result, when the socket is removed from the plug portion 1j, an accident in which the main valve 2 maintains the stopped state in the open position is prevented in advance.

主弁より下流側のガス流出孔1b内には、第3コイルばね5が収容されている。この第3コイルばね5は、一端が隔壁部2dに突き当たり、他端が弁部3aに突き当たっている。したがって、第3コイルばね5は、主弁2を閉位置側から開位置に向かって付勢している。しかし、第3コイルばね5の付勢力は、第1コイルばね4Aの付勢力より弱く設定されている。したがって主弁2が第3コイルばね5によって開位置側へ移動させられることはない。第3コイルばね5は、副弁3を離間位置側から着座位置側へ付勢している。したがって、主弁2が何等かの事故によって閉位置と開位置との間において停止したような場合には、副弁3が第3コイルばね5によって着座位置まで移動させられ、弁部3aが弁座1fに着座させられる。   A third coil spring 5 is accommodated in the gas outflow hole 1b on the downstream side of the main valve. One end of the third coil spring 5 abuts against the partition wall portion 2d, and the other end abuts against the valve portion 3a. Therefore, the third coil spring 5 biases the main valve 2 from the closed position side toward the open position. However, the biasing force of the third coil spring 5 is set to be weaker than the biasing force of the first coil spring 4A. Therefore, the main valve 2 is not moved to the open position side by the third coil spring 5. The third coil spring 5 urges the auxiliary valve 3 from the separated position side to the seating position side. Therefore, when the main valve 2 is stopped between the closed position and the open position due to some accident, the auxiliary valve 3 is moved to the seating position by the third coil spring 5, and the valve portion 3a is moved to the valve position. It is seated on the seat 1f.

上記構成のガス栓Aにおいて、いま、主弁2が閉位置に位置するとともに、副弁3が着座位置に位置しているものとする。この状態では、ガス流入孔1aの開口部1gより下流側に位置するガス流出孔1b、つまり小径孔部1eが主弁2の小径部2Bによって閉じられるとともに、弁座1fに着座した副弁3の弁部3aによって閉じられている。したがって、ガス栓Aが閉状態になっている。   In the gas stopper A having the above-described configuration, it is assumed that the main valve 2 is positioned at the closed position and the sub valve 3 is positioned at the seating position. In this state, the gas outflow hole 1b located on the downstream side of the opening 1g of the gas inflow hole 1a, that is, the small diameter hole 1e is closed by the small diameter 2B of the main valve 2, and the sub valve 3 seated on the valve seat 1f. The valve portion 3a is closed. Therefore, the gas stopper A is in a closed state.

プラグ部1jにソケットを外挿すると、ソケットの押しロッドRが第1コイルばね4Aの付勢力に抗して副弁3を着座位置から離間位置側へ押圧移動させるとともに、主弁2を閉位置から開位置側へ移動させる。ソケットをさらに外挿すると、押しロッドRが副弁3及び主弁2を第1及び第2コイルばね4A,4Bの付勢力に抗して押圧移動させる。ソケットを所定の接続位置まで外挿すると、副弁3が離間位置に達するとともに、主弁2が開位置に達する。すると、連通孔2b,2cが隙間Sを介してガス流入孔1aと連通し、ガス栓Aが開状態になる。開状態では、ガス流入孔1a内のガスが、隙間S、連通孔2b,2c、隔壁部2dより左側の主弁2の内部を通ってガス流入孔1bの下流側に流入し、さらに弁座1fを通ってソケットに流入する。ソケットに流入したガスは、二次側ガス管(図示せず)を介してガス機器に供給される。   When the socket is extrapolated to the plug portion 1j, the push rod R of the socket presses and moves the auxiliary valve 3 from the seating position to the separated position side against the biasing force of the first coil spring 4A, and the main valve 2 is closed. Move to the open position side. When the socket is further extrapolated, the push rod R pushes and moves the auxiliary valve 3 and the main valve 2 against the urging forces of the first and second coil springs 4A and 4B. When the socket is extrapolated to a predetermined connection position, the auxiliary valve 3 reaches the separated position and the main valve 2 reaches the open position. Then, the communication holes 2b and 2c communicate with the gas inflow hole 1a through the gap S, and the gas plug A is opened. In the open state, the gas in the gas inflow hole 1a flows into the downstream side of the gas inflow hole 1b through the gap S, the communication holes 2b and 2c, the interior of the main valve 2 on the left side of the partition wall 2d, and the valve seat. It flows into the socket through 1f. The gas that has flowed into the socket is supplied to the gas equipment via a secondary gas pipe (not shown).

ソケットをプラグ部1jから取り外すと、主弁2及び副弁3が第1及び第2コイルばね4A,4Bによって閉位置側及び着座位置側へ押圧移動させられる。所定距離だけ移動した後、主弁2及び副弁3は、第1コイルばね4Aによって閉位置及び着座位置側へ押圧移動させられる。弁部3aが弁座1fに着座すると、副弁3が着座位置において停止するとともに、主弁2が閉位置において停止する。これにより、ガス栓Aが閉状態に戻る。   When the socket is removed from the plug portion 1j, the main valve 2 and the sub valve 3 are pushed and moved to the closed position side and the seating position side by the first and second coil springs 4A and 4B. After moving by a predetermined distance, the main valve 2 and the sub valve 3 are pushed and moved to the closed position and the seating position side by the first coil spring 4A. When the valve portion 3a is seated on the valve seat 1f, the auxiliary valve 3 stops at the seating position, and the main valve 2 stops at the closed position. Thereby, the gas stopper A returns to a closed state.

上記のガス栓Aにおいては、主弁2が閉位置と開位置との間のいずれの位置に位置している場合であっても、主弁2の小径部2Bがシール部材6に摺動可能に接触している。しかも、小径部2Bは、一定の外径を有している。主弁が閉位置と開位置との間を移動するときにシール部材全体が縮径することがない。したがって、シール部材6は、一定の内径を維持した状態で主弁2の外周面上を相対的に摺動する。つまり、シール部材6が縮径してその全体が段差面に突き当たるような事態が発生することがない。したがって、主弁2は、比較的小さな力で閉位置と開位置との間を移動させることができ、それに対応して第1コイルばね4Aの付勢力を比較的弱く設定することができる。よって、ソケットをプラグ部1jに接続する際には、小さい力で容易に接続することができる。   In the gas plug A, the small-diameter portion 2B of the main valve 2 can slide on the seal member 6 regardless of the position of the main valve 2 between the closed position and the open position. Touching. Moreover, the small diameter portion 2B has a constant outer diameter. When the main valve moves between the closed position and the open position, the entire sealing member does not shrink. Therefore, the seal member 6 slides relatively on the outer peripheral surface of the main valve 2 while maintaining a constant inner diameter. That is, a situation in which the diameter of the seal member 6 is reduced and the whole of the seal member 6 abuts against the step surface does not occur. Therefore, the main valve 2 can be moved between the closed position and the open position with a relatively small force, and the urging force of the first coil spring 4A can be set relatively weak accordingly. Therefore, when connecting the socket to the plug portion 1j, the connection can be easily made with a small force.

なお、主弁2が閉位置と開位置との間を移動するときには、連通孔2b,2cがシール部材6を通過する。そのときには、シール部材6の連通孔2b,2cと対向する内周部が縮径して連通孔2b,2c内に入り込む。しかし、連通孔2b,2c内に入り込むのは、シール部材6の全周のうちの一部だけである。したがって、シール部材6が連通孔2b,2cの内側(シール部材6の径方向の内側)に入り込む量も少ない。よって、シール部材6の内周部の一部が連通孔2b,2c内に入り込むことにより、主弁2の円滑な移動が阻害されることはほとんどない。   When the main valve 2 moves between the closed position and the open position, the communication holes 2b and 2c pass through the seal member 6. At that time, the inner peripheral portion of the seal member 6 facing the communication holes 2b and 2c is reduced in diameter and enters the communication holes 2b and 2c. However, only a part of the entire circumference of the seal member 6 enters the communication holes 2b and 2c. Therefore, the amount of the seal member 6 entering the inside of the communication holes 2b and 2c (the inside in the radial direction of the seal member 6) is small. Therefore, the smooth movement of the main valve 2 is hardly hindered when a part of the inner peripheral portion of the seal member 6 enters the communication holes 2b and 2c.

主弁2が閉位置及び開位置に位置しているときには、シール部材6が主弁2の小径部2Bによって覆われている。したがって、ガス内に含まれる塵埃がシール部材6に付着することを最小限に止めることができる。したがって、シール部材6の早期摩耗や早期劣化を防止することができる。   When the main valve 2 is located at the closed position and the open position, the seal member 6 is covered with the small diameter portion 2B of the main valve 2. Therefore, it is possible to minimize the dust contained in the gas from adhering to the seal member 6. Therefore, early wear and early deterioration of the seal member 6 can be prevented.

なお、この発明は、上記の実施の形態に限定されるものでなく、その要旨を逸脱しない範囲において適宜変更可能である。
例えば、上記の実施の形態においては、主弁2を円筒状にしているが、中実にしてもよい。その場合には、連通孔2bが形成された箇所から主弁2の下流側の端面(左端面)まで延びる連通溝を形成すればよく、連通溝がガス通路になる。ただし、上記の実施の形態のように、円筒状の主弁2を用いた場合には、ガスの流量を十分に多くすることができる。したがって、円筒状の主弁2を用いることが望ましい。
また、上記の実施の形態においては、主弁2のガイド溝2aに突条1hを嵌め込むことにより、主弁2をガス流出孔1bに対し周方向へは位置固定しているが、環状の隙間Sを形成する場合には、主弁2の周方向の位置に拘わらず連通孔2b、2cがガス流入孔1aに隙間Sを介して連通するので、必ずしも主弁2を周方向に位置固定する必要がない。主弁2が位置固定されない場合には、突条1h及びガイド溝2aが省略される。
In addition, this invention is not limited to said embodiment, In the range which does not deviate from the summary, it can change suitably.
For example, in the above embodiment, the main valve 2 is cylindrical, but may be solid. In that case, it is only necessary to form a communication groove extending from the location where the communication hole 2b is formed to the downstream end surface (left end surface) of the main valve 2, and the communication groove becomes a gas passage. However, when the cylindrical main valve 2 is used as in the above embodiment, the gas flow rate can be sufficiently increased. Therefore, it is desirable to use the cylindrical main valve 2.
In the above embodiment, the main valve 2 is fixed in the circumferential direction with respect to the gas outflow hole 1b by fitting the protrusion 1h into the guide groove 2a of the main valve 2. When the gap S is formed, the communication holes 2b and 2c communicate with the gas inflow hole 1a via the gap S regardless of the position of the main valve 2 in the circumferential direction. There is no need to do. When the main valve 2 is not fixed in position, the protrusion 1h and the guide groove 2a are omitted.

この発明の一実施の形態を、主弁を閉位置に位置させた状態で示す断面図である。It is sectional drawing which shows one Embodiment of this invention in the state which has located the main valve in the closed position. 同実施の形態を、主弁を開位置に位置させた状態で示す断面図である。It is sectional drawing which shows the embodiment in the state which has located the main valve in the open position. 同実施の形態の一部を切り欠いて示す分解斜視図である。It is a disassembled perspective view which notches and shows a part of the embodiment.

符号の説明Explanation of symbols

A ガス栓
1 主弁
1a ガス流入孔
1b ガス流出孔
1f 弁座
1g (ガス流出孔の内周面におけるガス流入孔の)開口部
1i 環状溝
2 主弁
2b 連通孔
2c 連通孔
3 副弁
4A 第1コイルばね(第1付勢手段)
5 第3コイルばね(第2付勢手段)
6 シール部材
A Gas plug 1 Main valve 1a Gas inflow hole 1b Gas outflow hole 1f Valve seat 1g Opening 1i (of the gas inflow hole on the inner peripheral surface of the gas outflow hole) Annular groove 2 Main valve 2b Communication hole 2c Communication hole 3 Sub valve 4A First coil spring (first biasing means)
5 Third coil spring (second biasing means)
6 Seal member

Claims (3)

内部に、ガス流入孔及び内周面に上記ガス流入孔が開口するガス流出孔が形成された栓本体と、上記ガス流出孔に閉位置とこの閉位置より所定距離側だけ上流側に離れた開位置との間を摺動可能に設けられた主弁と、この主弁より上流側の上記ガス流出孔内に収容され、上記主弁を上記開位置側から上記閉位置に向かって付勢する第1付勢手段と、上記主弁より下流側の上記ガス流出孔内に、上記ガス流出孔の下流側の端部に形成された弁座に着座した着座位置と上記弁座から所定距離だけ上流側に離間した離間位置との間を移動可能に設けられた副弁と、この副弁と上記主弁との間の上記ガス流出孔内に設けられ、上記副弁を上記離間位置側から上記着座位置に向かって付勢する第2付勢手段と、上記流出孔の内周面と上記主弁の外周面との間に設けられた弾性材からなるリング状のシール部材とを備え、上記主弁が上記閉位置に位置しているときには、上記ガス流出孔の内周面における上記ガス流入孔の開口部より下流側に位置する上記ガス流出孔の内周面と上記主弁の外周面との間が上記シール部材によって全周にわたって封止されるガス栓において、
上記流入孔の開口部より下流側に位置する上記ガス流出孔の内周面に環状溝が形成され、この環状溝に上記シール部材が上記ガス流出孔の長手方向へほぼ移動不能に装着され、上記主弁が上記閉位置と上記開位置との間に位置しているときに上記シール部材に接触する上記主弁の外周面が一定の外径をもって形成され、上記主弁には、一端が上記主弁の外周面に開放され、他端が上記主弁の上流側の端面に開放されたガス通路が形成され、このガス通路の一端開放部は、上記主弁が上記閉位置に位置しているときには上記シール部材より上記ガス流出孔の下流側に位置し、上記主弁が上記開位置に位置しているときには上記シール部材より上記ガス流出孔の上流側に位置して上記ガス流入孔の開口部に連通するように配置されていることを特徴とするガス栓。
Inside, a plug main body having a gas inflow hole and a gas outflow hole in which the gas inflow hole opens on the inner peripheral surface, a closed position in the gas outflow hole, and a predetermined distance side away from the closed position upstream. A main valve that is slidable between the open position and the gas outlet hole upstream of the main valve, and energizes the main valve from the open position toward the closed position A first urging means, a seating position seated on a valve seat formed at an end portion on the downstream side of the gas outflow hole in the gas outflow hole on the downstream side of the main valve, and a predetermined distance from the valve seat A sub-valve provided to be movable between a separated position spaced upstream only, and provided in the gas outflow hole between the sub-valve and the main valve, and the sub-valve is disposed on the separated position side. Second urging means for urging the seat toward the seating position, an inner peripheral surface of the outflow hole, and an outer peripheral surface of the main valve, A ring-shaped sealing member made of an elastic material provided between them, and when the main valve is located at the closed position, it is downstream of the opening of the gas inlet hole on the inner peripheral surface of the gas outlet hole. In the gas stopper in which the gap between the inner peripheral surface of the gas outflow hole located on the side and the outer peripheral surface of the main valve is sealed over the entire periphery by the seal member,
An annular groove is formed on the inner peripheral surface of the gas outflow hole located downstream from the opening of the inflow hole, and the seal member is mounted in the annular groove so as to be substantially immovable in the longitudinal direction of the gas outflow hole. An outer peripheral surface of the main valve that contacts the seal member when the main valve is located between the closed position and the open position is formed with a constant outer diameter, and the main valve has one end. A gas passage is formed which is open to the outer peripheral surface of the main valve and has the other end opened to an upstream end surface of the main valve. The open end of the gas passage is located at the closed position of the main valve. The gas inflow hole is positioned on the downstream side of the gas outflow hole from the seal member, and is positioned on the upstream side of the gas outflow hole from the seal member when the main valve is in the open position. It is arranged to communicate with the opening of Gas plug to be.
上記主弁が、上流側の端部が開口し、上記ガス流入孔の開口部より下流側の部分が閉じられた筒体として形成され、上記主弁の上記閉じられた部分より下流側に位置する周壁部には当該周壁部を貫通する連通孔が形成され、この連通孔と上記主弁の内部とによって上記ガス通路が構成され、上記主弁の周壁部の外周面における上記連通孔の開口部が上記開放部とされていることを特徴とする請求項1に記載のガス栓。 The main valve is formed as a cylindrical body having an upstream end opened, and a portion downstream of the gas inlet hole is closed, and is positioned downstream of the closed portion of the main valve. A communication hole penetrating the peripheral wall portion is formed in the peripheral wall portion, the gas passage is constituted by the communication hole and the inside of the main valve, and the opening of the communication hole in the outer peripheral surface of the peripheral wall portion of the main valve The gas stopper according to claim 1, wherein a portion is the open portion. 上記主弁が上記開位置に位置しているときに、上記シール部材が上記主弁の外周面に全周にわたって接触させられていることを特徴とする請求項2に記載のガス栓。 The gas stopper according to claim 2, wherein when the main valve is located at the open position, the seal member is in contact with the outer peripheral surface of the main valve over the entire circumference.
JP2008056413A 2008-03-06 2008-03-06 Gas stopper Active JP5093894B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012017805A (en) * 2010-07-08 2012-01-26 Koyo Sangyo Ltd Gas cock
JP2012082911A (en) * 2010-10-13 2012-04-26 Koyo Sangyo Ltd Gas cock
JP2014066291A (en) * 2012-09-25 2014-04-17 Osaka Gas Co Ltd Gas cock

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5134023U (en) * 1974-09-05 1976-03-12
JPS5360132U (en) * 1976-10-25 1978-05-22
JPS63135691A (en) * 1986-11-28 1988-06-08 日立金属株式会社 Pipe body connector for suction
JPS6397792U (en) * 1986-12-15 1988-06-24
JPS6446595U (en) * 1987-09-18 1989-03-22

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5134023U (en) * 1974-09-05 1976-03-12
JPS5360132U (en) * 1976-10-25 1978-05-22
JPS63135691A (en) * 1986-11-28 1988-06-08 日立金属株式会社 Pipe body connector for suction
JPS6397792U (en) * 1986-12-15 1988-06-24
JPS6446595U (en) * 1987-09-18 1989-03-22

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012017805A (en) * 2010-07-08 2012-01-26 Koyo Sangyo Ltd Gas cock
JP2012082911A (en) * 2010-10-13 2012-04-26 Koyo Sangyo Ltd Gas cock
JP2014066291A (en) * 2012-09-25 2014-04-17 Osaka Gas Co Ltd Gas cock

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