JP6359745B1

JP6359745B1 - valve

Info

Publication number: JP6359745B1
Application number: JP2017194421A
Authority: JP
Inventors: 和也世良; 敏治萩原; 幸伸岩崎
Original assignee: SR Engineering Co Ltd
Current assignee: SR Engineering Co Ltd
Priority date: 2017-10-04
Filing date: 2017-10-04
Publication date: 2018-07-18
Anticipated expiration: 2037-10-04
Also published as: JP2019066015A

Abstract

【課題】高圧流体を使用する場合でも、弁のシート性や軸の摺動性及びシール性を良好にする。【解決手段】弁ハウジング６内の上端と下端との間にある軸通路１６に沿って分割軸部材１８、２０からなる軸が配置されている。弁体２６が流路１２、１４間に位置して分割軸部材１８に設けられている。分割軸部材１８、２０は、Ｔ溝４６とＴ字状部４８とで結合され、この結合は、分割軸部材１８、２０同士の傾き及び半径方向への移動を許容する。軸部材１８に案内部材３４が、軸部材２０に案内部材５０が設けられ、案内部材３４に弁体２６に対する弁座４２が一体に形成されている。軸分割部材１８の円筒状部３２はシール部材３８ａ、３８ｂでシールされ、軸分割部材２０の円筒状部２０ａはシール部材５２ａ、５２ｂでシールされている。円筒状部３２と円筒状部２０ａとの径及び弁座４２の内径は、ほぼ同じに形成されている。【選択図】図１Even when a high-pressure fluid is used, the valve seating property, shaft sliding property and sealing property are improved. A shaft comprising divided shaft members (18, 20) is arranged along an axial passage (16) between an upper end and a lower end in a valve housing (6). A valve body 26 is located between the flow paths 12 and 14 and is provided on the split shaft member 18. The split shaft members 18 and 20 are connected by a T groove 46 and a T-shaped portion 48, and this connection allows the split shaft members 18 and 20 to be inclined and moved in the radial direction. A guide member 34 is provided on the shaft member 18, and a guide member 50 is provided on the shaft member 20, and a valve seat 42 for the valve body 26 is integrally formed on the guide member 34. The cylindrical portion 32 of the shaft split member 18 is sealed with seal members 38a and 38b, and the cylindrical portion 20a of the shaft split member 20 is sealed with seal members 52a and 52b. The diameters of the cylindrical portion 32 and the cylindrical portion 20a and the inner diameter of the valve seat 42 are formed substantially the same. [Selection] Figure 1

Description

本発明は、弁体が設けられた軸を進退させて、前記弁体を弁座に着座及び離座させる弁に関し、特に、前記軸の構成に関する。 The present invention relates to a valve for advancing and retracting a shaft provided with a valve body so that the valve body is seated on and separated from a valve seat, and more particularly to the configuration of the shaft.

従来、上記のような弁としては、例えば特許文献１に開示されているようなものがある。特許文献１の技術によれば、弁本体部内の上下方向に沿う軸通路に軸が配置されている。軸通路の上部は軸の直径よりも直径方向に拡大されており、このアダプター収容部に配置されたアダプターが軸の直径にほぼ一致する直径を有する孔を有し、この孔内に軸の上部が挿入されて上下方向に案内される。軸の下部は、弁本体の下部にある軸の直径とほぼ同じ直径を有する軸通路部分（下部孔）に挿入されて、上下方向に案内される。弁本体部における軸通路の左右両側に、軸通路と離れて流体の流入口と流出口が設けられている。流入口は、これに対応して本体部内に設けた流入口側流路によって軸通路に繋がれ流出口も、これに対応して本体部に設けた流出口側流路によって軸通路に繋がれている。流入口側流路及び流出口側流路間に位置するように、軸通路に設けた弁座保持部に弁座が配置され、前記軸の進退に応じて、弁座に着座及び離座する弁体が軸に設けられている。弁体の上下両側の軸部分それぞれに、オーリングを有する受圧部を設け、一方の受圧部のオーリングを軸の下部が挿通されている軸通路部分に圧接させ、他方の受圧部のオーリングをアダプターの孔に圧接させ、受圧部の外径と弁座の内径とをほぼ等しくさせている。 Conventionally, as such a valve, for example, there is one disclosed in Patent Document 1. According to the technique of Patent Document 1, a shaft is disposed in an axial passage along the vertical direction in the valve body. The upper part of the shaft passage is enlarged in the diameter direction rather than the diameter of the shaft, and the adapter arranged in the adapter receiving portion has a hole having a diameter substantially matching the diameter of the shaft, and the upper part of the shaft is in this hole. Is inserted and guided up and down. The lower portion of the shaft is inserted into a shaft passage portion (lower hole) having substantially the same diameter as the shaft at the lower portion of the valve body, and is guided in the vertical direction. On the left and right sides of the shaft passage in the valve body, fluid inlets and outlets are provided apart from the shaft passages. Correspondingly, the inlet is connected to the axial passage by the inlet-side flow path provided in the main body, and the outlet is also connected to the axial passage by the corresponding outlet-side flow path provided in the main body. ing. A valve seat is disposed in a valve seat holding portion provided in the shaft passage so as to be positioned between the inlet-side channel and the outlet-side channel, and is seated on and separated from the valve seat in accordance with the advance and retreat of the shaft. A valve body is provided on the shaft. A pressure receiving portion having an O-ring is provided on each of the upper and lower shaft portions of the valve body, and the O-ring of one pressure receiving portion is brought into pressure contact with the shaft passage portion through which the lower portion of the shaft is inserted, and the O-ring of the other pressure receiving portion Is pressed into the hole of the adapter so that the outer diameter of the pressure receiving portion and the inner diameter of the valve seat are substantially equal.

特開平９−１００９４１号公報Japanese Patent Laid-Open No. 9-10091

特許文献１の技術によれば、上述したように軸の両端部に受圧部を設け、受圧部の外径と弁座の内径とをほぼ一致するように構成しているので、流路を流れる流体が高圧であっても、その圧力による軸の上方向にかかる力と、軸の下方向にかかる力とが互いに相殺されることによって、軸線方向の上下いずれか一方に偏った力が作用することが軽減される。しかし、特許文献１の技術によれば、軸は１本で構成されており、その上部がアダプターによって案内され、下部が軸通路の下部（下部孔）によって案内され、かつ弁座が軸通路の弁座保持部に保持されることによって軸のアダプターや軸通路の下部孔とは独立した構成である。そのため軸のアダプターの中心軸と軸通路の下部孔の中心軸と弁座の中心軸の３つの中心軸を一致させる必要があり、また、軸も軸の両端と、弁体の中心軸を一致させる必要がある。特に、使用される流体の圧力が高い場合は、本体のアダプター収容部内径、アダプターの外径と内径、本体下部の下部孔の中心軸を高精度に一致させる必要があり、さらに弁座部品の外径、内径の中心軸も高精度に一致させる必要がある。軸の両端部と弁座の中心軸に傾き、ズレがあるなど精度が低い場合、軸の両端を支持された状態で弁体を弁座に完全に着座させるのは困難である。弁体及び弁座が金属製の場合は、例えば弁座及び弁体の一方または双方がゴムや樹脂等の弾性体でできている場合に比べ変形が少ないので特に高精度が必要になるが困難である。また、軸の両端の中心軸がずれている場合は、軸の摺動抵抗も大きくなり、またシール性も良くない。 According to the technique of Patent Document 1, the pressure receiving portions are provided at both ends of the shaft as described above, and the outer diameter of the pressure receiving portion and the inner diameter of the valve seat are configured to substantially coincide with each other. Even if the fluid is high pressure, the force applied upward of the shaft due to the pressure and the force applied downward of the shaft cancel each other, thereby exerting a biased force in either the upper or lower direction in the axial direction. That is alleviated. However, according to the technique of Patent Document 1, the shaft is constituted by one, the upper part is guided by the adapter, the lower part is guided by the lower part (lower hole) of the shaft path, and the valve seat is the shaft path. By being held by the valve seat holding portion, the shaft adapter and the lower hole of the shaft passage are independent of each other. Therefore, it is necessary to match the center axis of the shaft adapter, the center axis of the lower hole of the shaft passage, and the center axis of the valve seat, and the shaft also matches the center axis of the valve body with both ends of the shaft. It is necessary to let In particular, when the pressure of the fluid used is high, it is necessary to match the inner diameter of the adapter housing part of the main body, the outer diameter and inner diameter of the adapter, and the central axis of the lower hole at the lower part of the main body with high precision. The center axis of the outer diameter and inner diameter must also be matched with high accuracy. When the accuracy is low, such as tilting and misalignment between both ends of the shaft and the central axis of the valve seat, it is difficult to completely seat the valve body on the valve seat while the both ends of the shaft are supported. When the valve body and the valve seat are made of metal, for example, one or both of the valve seat and the valve body is less deformed than a case where the valve body and the valve body are made of an elastic body such as rubber or resin. It is. Moreover, when the center axis | shaft of the both ends of the axis | shaft has shifted | deviated, the sliding resistance of an axis | shaft will become large and sealing property will not be good.

本発明は、高圧流体を使用する場合でも、軸の両側の一方に偏って流体圧による力が作用することを防止したうえで、弁体の弁座に対するシート性が良好で、軸の摺動性及びシール性も良好な弁を提供することを目的とする。 Even when a high-pressure fluid is used, the present invention prevents the force due to the fluid pressure from being biased to one of both sides of the shaft, and has good seating characteristics with respect to the valve seat of the valve body, and the sliding of the shaft. The object is to provide a valve with good performance and sealing performance.

本発明の一態様の弁は、弁本体部を有し、この弁本体部の一端部と他端部との間に形成された軸通路に、軸が配置されている。本体部における軸通路から離れたそれぞれの位置に少なくとも２つのポートが設けられている。これら２つのポートは、弁本体部の外界にそれぞれが連通している。少なくとも２つのポートは、例えば流体の流入口及び流出口である。前記少なくとも２つの流体のポートを軸通路と連通するように、本体部内に少なくとも２つの流路が設けられている。軸通路における前記少なくとも２つの流路間に少なくとも１つの弁座が設けられている。軸に設けられた少なくとも１つの弁体が、前記軸の進退に応じて、前記少なくとも１つの弁座に着座及び離座する。この軸の一端部に軸進退手段が結合され、軸進退手段は、軸とは別個に形成され、前記弁本体部の外部から前記軸を前記軸通路に沿って手動または自動で軸を進退させる。軸は、複数の分割軸部材によって構成されている。前記複数の分割軸部材は、それぞれが前記軸通路内に前記軸通路に沿って連続的に位置している。前記軸の一端部の側にある前記軸分割部材と前記軸の他端部の側にある前記軸分割部材にそれぞれ対応してシール部材が設けられ、これらシール部材が、これらシール部材の間にある前記軸の部分の間をシールしている。シール部材は、弁本体部側に設けることもできるし、軸側に設けることもできる。前記一端部の側と前記他端部の側とのシール部材によってそれぞれシールされている前記軸の部分の径と、前記弁座の内径とがほぼ等しく形成されている。複数の分割軸部材は、分割軸部材同士の傾き及び軸の半径方向への移動の一方または双方を許容するように結合されている。さらに、複数の分割軸部材は、前記弁本体部内に前記複数の分割軸部材それぞれに対応して設けられた複数の案内部材によって案内されている。 The valve of one embodiment of the present invention has a valve main body, and a shaft is disposed in an axial passage formed between one end and the other end of the valve main body . At least two ports are provided at respective positions away from the shaft passage in the main body. Each of these two ports communicates with the outside of the valve body. The at least two ports are, for example, a fluid inlet and outlet. At least two flow paths are provided in the main body so that the at least two fluid ports communicate with the axial passage. At least one valve seat is provided between the at least two flow paths in the axial passage. At least one valve body provided on the shaft is seated on and separated from the at least one valve seat in accordance with advancement and retreat of the shaft. A shaft advancing / retracting means is coupled to one end of the shaft, and the shaft advancing / retreating means is formed separately from the shaft, and advances or retracts the shaft manually or automatically along the shaft path from the outside of the valve main body. . The shaft is composed of a plurality of divided shaft members. Each of the plurality of split shaft members is continuously located along the shaft passage in the shaft passage. A seal member is provided corresponding to each of the shaft split member on the one end side of the shaft and the shaft split member on the other end side of the shaft, and the seal member is interposed between the seal members. A portion between the shaft portions is sealed. The seal member can be provided on the valve main body side or on the shaft side. The diameter of the portion of the shaft sealed by the sealing member on the one end side and the other end side is formed substantially equal to the inner diameter of the valve seat. The plurality of divided shaft members are coupled so as to allow one or both of the inclination of the divided shaft members and the movement of the shaft in the radial direction. Further, the plurality of split shaft members are guided by a plurality of guide members provided in the valve main body corresponding to the plurality of split shaft members, respectively.

このように構成された弁では、軸の両端部をシール部材でシールし、シール部材の間に少なくとも１つの弁体を設け、シール部材によってそれぞれシールされている前記軸の部分の径と前記弁座の内径とがほぼ等しく形成されているので、流体の圧力が高い場合でも、その圧力による軸の上方向にかかる力と、軸の下方向にかかる力とが互いに相殺されることによって、軸線方向の上下いずれか一方に偏った力が作用することが軽減される。その上、軸を構成する複数の分割軸部材は、それぞれに設けられた案内部材によって案内されるので、各分割軸部材と対応する案内部材との軸線を一致させられる。しかも、分割軸部材は、分割軸部材同士の傾き及び軸の半径方向に移動の一方または双方を許容するように結合されている。従って、分割軸部材同士の傾きを許容するように両者を結合した場合、弁体が設けられた分割軸部材と結合されている分割軸部材を、弁本体部に配置したとき、仮に傾いていたとしても、弁体が設けられた分割軸部材をその中心軸付近で下方に、傾いている分割軸部材が押すので、弁体が設けられている分割軸部材を傾けること無く、弁体が弁座に確実に着座する。軸の半径方向に移動を許容するように結合した場合、分割軸部材間の中心軸にずれが生じても、そのずれは、半径方向の移動によって吸収される。分割軸部材同士の傾き及び軸の半径方向に移動の双方を許容するように結合されている場合には、分割軸部材の中心軸間のずれを吸収できる上に、弁体を弁座に確実に着座させることができる。従って、本発明の弁によれば、軸線方向の上下いずれか一方に偏った力が作用することが軽減される上に、弁体の弁座に対するシート性が向上するし、軸の摺動性やシール性も向上させることができる。 In the valve configured as described above, both ends of the shaft are sealed with a seal member, and at least one valve body is provided between the seal members. The diameter of the shaft portion and the valve respectively sealed by the seal member Since the inner diameter of the seat is substantially equal, even if the pressure of the fluid is high, the force applied upward of the shaft and the force applied downward of the shaft due to the pressure cancel each other, so that the axis line It is possible to reduce the action of a biased force on either the top or bottom of the direction. In addition, since the plurality of divided shaft members constituting the shaft are guided by the guide members provided respectively, the axis lines of the respective divided shaft members and the corresponding guide members can be matched. Moreover, the divided shaft members are coupled so as to allow one or both of the inclination of the divided shaft members and the movement in the radial direction of the shaft. Therefore, when both of them are combined so as to allow the inclination of the divided shaft members, when the divided shaft member combined with the divided shaft member provided with the valve body is disposed on the valve main body portion, it is temporarily inclined. Even if the split shaft member provided with the valve element pushes the divided shaft member downward near the center axis thereof, the inclined split shaft member pushes the valve element without tilting the split shaft member provided with the valve element. Sit securely on the seat. When coupled so as to allow movement in the radial direction of the shaft, even if a shift occurs in the central axis between the divided shaft members, the shift is absorbed by the movement in the radial direction. When combined so as to allow both the inclination of the divided shaft members and movement in the radial direction of the shaft, the displacement between the central axes of the divided shaft members can be absorbed, and the valve body can be securely attached to the valve seat. Can be seated. Therefore, according to the valve of the present invention, it is possible to reduce the action of a biased force on either the upper or lower side in the axial direction, and the seating property of the valve body against the valve seat is improved, and the sliding property of the shaft is improved. And sealability can also be improved.

本発明の他の態様の弁も、弁本体部を有し、この弁本体部の一端部と他端部との間に形成された軸通路に、軸が配置されている。軸は、一端部の側と他端部の側とでシール部材によってそれぞれシールされている。シール部材は、弁本体部側に設けることもできるし、軸側に設けることもできる。弁本体部における軸通路から離れたそれぞれの位置に少なくとも２つのポートが設けられている。これら２つのポートは、弁本体部の外界にそれぞれが連通している。少なくとも２つのポートは、例えば流体の流入口及び流出口である。前記少なくとも２つの流体のポートを軸通路と連通するように、本体部内に少なくとも２つの流路が設けられている。軸通路における前記少なくとも２つの流路間に少なくとも１つの弁座が設けられている。軸に設けられた少なくとも１つの弁体が、前記軸の進退に応じて、前記少なくとも１つの弁座に着座及び離座する。少なくとも１つの弁体は、一端部の側と他端部の側とのシール部材の間に設けられている。前記一端部の側と前記他端部の側とのシール部材によってそれぞれシールされている前記軸の部分の径と、前記弁座の内径とがほぼ等しく形成されている。軸は、複数の分割軸部材によって構成され、複数の分割部材は、それぞれが軸通路内に前記軸通路に沿って連続的に位置し、分割軸部材同士の傾き及び軸の半径方向への移動の一方または双方を許容するように結合されている。さらに、複数の分割軸部材は、前記弁本体部内に前記複数の分割軸部材それぞれに対応して設けられた複数の案内部材によって案内されている。前記少なくとも１つの弁体が設けられた前記分割軸部材と、前記少なくとも１つの弁体とを一体に形成し、前記複数の案内部材のうち、前記弁体が設けられた前記分割軸部材に対応するものに、前記弁座を一体に設けることもできる。このように構成すると、弁体が設けられた分割軸部材と弁体とは、一体に形成され、同時加工可能であるので、両者の中心軸は一致させられる。また弁座が設けられた案内部材と弁座とも、一体に形成され、同時加工可能であるので、両者の中心軸は一致させられる。このような弁座が一体に設けられた案内部材に、弁体が一体に設けられた分割軸部材を挿通しているので、弁座の中心軸と、弁体の中心軸とにずれが無いので、シート性がさらに良好になる。 The valve according to another aspect of the present invention also has a valve main body, and a shaft is disposed in an axial passage formed between one end and the other end of the valve main body. The shaft is sealed by a sealing member on one end side and the other end side. The seal member can be provided on the valve main body side or on the shaft side. At least two ports are provided at respective positions away from the shaft passage in the valve body. Each of these two ports communicates with the outside of the valve body. The at least two ports are, for example, a fluid inlet and outlet. At least two flow paths are provided in the main body so that the at least two fluid ports communicate with the axial passage. At least one valve seat is provided between the at least two flow paths in the axial passage. At least one valve body provided on the shaft is seated on and separated from the at least one valve seat in accordance with advancement and retreat of the shaft. At least one valve body is provided between the sealing members on the one end side and the other end side. The diameter of the portion of the shaft sealed by the sealing member on the one end side and the other end side is formed substantially equal to the inner diameter of the valve seat. The shaft is constituted by a plurality of divided shaft members, and each of the plurality of divided members is continuously located along the shaft passage in the shaft passage, and the inclination of the divided shaft members and the movement of the shaft in the radial direction are performed. Of one or both of them. Further, the plurality of split shaft members are guided by a plurality of guide members provided in the valve main body corresponding to the plurality of split shaft members, respectively. The split shaft member provided with the at least one valve body and the at least one valve body are integrally formed and correspond to the split shaft member provided with the valve body among the plurality of guide members. In addition, the valve seat can be integrally provided. If comprised in this way, since the division | segmentation shaft member provided with the valve body and the valve body are integrally formed and can be processed simultaneously, both center axis | shafts are made to correspond. Moreover, since the guide member provided with the valve seat and the valve seat are integrally formed and can be simultaneously processed, the central axes of both are made to coincide. Since the split shaft member integrally provided with the valve body is inserted into the guide member integrally provided with such a valve seat, there is no deviation between the central axis of the valve seat and the central axis of the valve body. Therefore, the sheet property is further improved.

前記弁体が設けられている前記分割軸部材は、前記弁本体部の他端部付近に端部があるものとすることができる。前記弁体が設けられている前記分割軸部材は、その移動が前記弁本体部の外部から検出可能に構成されている。このように構成すると、弁体が弁座から離座していることや、離座した距離を精度良く検出することができ、例えば流量制御に使用することもできる。 The split shaft member provided with the valve body may have an end near the other end of the valve main body. The split shaft member provided with the valve body is configured such that its movement can be detected from the outside of the valve main body. If comprised in this way, it can detect accurately that the valve body has left | separated from the valve seat, and the seated distance, for example, can also be used for flow control.

さらに、前記弁体が設けられている前記分割軸部材は、前記弁本体部の外部に突出する検出体を有するものに構成することもできる。即ち、弁体が設けられた分割軸部材に検出体を一体に形成することもできるし、分割軸部材と別個に形成した検出体を、弁体が設けられた分割軸部材に取り付けることもできる。このように構成すると、検出体が検出手段を直接に駆動するタイプの検出手段でも、検出体が検出手段の近傍に位置したものが離れたり、近づいたりしたことを検出するタイプの検出手段のいずれでも、使用することができる。 Furthermore, the split shaft member provided with the valve body may be configured to have a detection body protruding outside the valve main body. That is, the detection body can be formed integrally with the split shaft member provided with the valve body, or the detection body formed separately from the split shaft member can be attached to the split shaft member provided with the valve body. . With this configuration, even if the detection unit is a type of detection unit in which the detection unit directly drives the detection unit, any detection unit of the type that detects that the detection unit located near the detection unit is separated or approached. But you can use it.

以上のように、本発明の弁では、高圧流体を使用する場合でも、軸の両側の一方に偏って流体圧による力が作用することを防止したうえで、弁体の弁座に対するシート性が良好で、軸の摺動性及びシール性も良好である。 As described above, in the valve of the present invention, even when high-pressure fluid is used, the seating property of the valve body against the valve seat is prevented after the force due to the fluid pressure is biased to one of the both sides of the shaft. It is good, and the sliding property and sealing property of the shaft are also good.

本発明の第１の実施形態の開閉弁の縦断正面図である。It is a vertical front view of the on-off valve of the 1st Embodiment of this invention. 図１の一部の拡大図である。It is a one part enlarged view of FIG. 本発明の第２の実施形態の開閉弁の一部の拡大図である。It is a one part enlarged view of the on-off valve of the 2nd Embodiment of this invention. 本発明の第３の実施形態の開閉弁の一部の拡大図である。It is a one part enlarged view of the on-off valve of the 3rd Embodiment of this invention.

本発明の第１の実施形態の弁は、開閉弁に本発明を実施したもので、高圧流体、例えば高圧気体、具体的には水素ガスを流通、遮断するために配管中に配置される。 The valve according to the first embodiment of the present invention is an on / off valve that implements the present invention, and is arranged in a pipe to circulate and shut off a high-pressure fluid, for example, a high-pressure gas, specifically hydrogen gas.

この開閉弁は、図１に示すように、弁部２と駆動部４とからなる。弁部２は、弁本体部、例えば弁ハウジング６を有している。弁ハウジング６は、概略筒状に形成され、上下方向の中央の周囲に外方に膨出した膨出部６ａを有し、その膨出部６ａの上下方向の異なる位置に、例えば弁ハウジング６の一端、例えば下端側に水素ガスのポート８が、弁ハウジング６の他端、例えば上端側に水素ガスのポート１０が、それぞれ内部に向かって水平に形成されている。ポート８は、例えば図1における弁ハウジング６の左側に、ポート１０は、弁ハウジング６の右側に、それぞれ位置している。これらポート８及びポート１０それぞれに連なって弁本体部２の中央に向かって水平に流路１２、１４が形成されている。これら流路１２、１４の内奥端は、軸通路１６に連通している。従って、ポート８、１０は、流路１２、１４及び軸通路１６を介して通じている。軸通路１６は、弁ハウジング６の一端と他端とを繋ぐ直線、例えば上下方向の中心軸線上に直線状に形成されている。軸通路１６は、上下両端それぞれで半径方向に拡大され、かつ開口している。 As shown in FIG. 1, this on-off valve includes a valve portion 2 and a drive portion 4. The valve part 2 has a valve body part, for example, a valve housing 6. The valve housing 6 is formed in a substantially cylindrical shape, and has a bulging portion 6a bulging outward around the center in the vertical direction. For example, the valve housing 6 is located at a different position in the vertical direction of the bulging portion 6a. A hydrogen gas port 8 is formed horizontally at one end, for example, the lower end side, and a hydrogen gas port 10 is formed horizontally toward the other end of the valve housing 6, for example, the upper end side. For example, the port 8 is located on the left side of the valve housing 6 in FIG. 1, and the port 10 is located on the right side of the valve housing 6. Channels 12 and 14 are formed in a horizontal direction toward the center of the valve main body 2 in series with the ports 8 and 10. The inner and inner ends of the flow paths 12 and 14 communicate with the shaft passage 16. Therefore, the ports 8 and 10 communicate with each other through the flow paths 12 and 14 and the axial passage 16. The shaft passage 16 is formed in a straight line on a straight line connecting one end and the other end of the valve housing 6, for example, a central axis in the vertical direction. The axial passage 16 is enlarged in the radial direction at each of the upper and lower ends and opened.

この軸通路１６内に、その長さ方向、例えば上下方向に沿って軸が配置されている。軸は、金属製で、複数、例えば２本の分割軸部材１８、２０によって構成されている。 A shaft is disposed in the shaft passage 16 along its length direction, for example, the vertical direction. The shaft is made of metal and includes a plurality of, for example, two split shaft members 18 and 20.

下側分割軸部材１８は、弁ハウジング６の下側の弁ハウジング６の下端付近から弁ハウジング６の中間付近まで位置している。下側分割軸部材１８の上端部には頭部２２が形成され、頭部２２は、流路１４より幾分上部に位置し、頭部２２の下側に、頭部２２より細径の首部２４が形成され、首部２４の下端の全域に弁体２６が一体に形成されている。 The lower split shaft member 18 is located from the vicinity of the lower end of the valve housing 6 on the lower side of the valve housing 6 to the vicinity of the middle of the valve housing 6. A head portion 22 is formed at the upper end portion of the lower divided shaft member 18, and the head portion 22 is positioned somewhat above the flow path 14, and a neck portion having a smaller diameter than the head portion 22 below the head portion 22. 24 is formed, and a valve body 26 is integrally formed in the entire lower end of the neck portion 24.

下側分割軸部材１８の弁体２６、円筒状部２８及び円筒状部３２を覆うように軸通路１６内には下側案内部材３４が配置されている。下側案内部材３４はその下部の外方が、弁ハウジング６の下端の開口に取り付けられた蓋部材３６に支持されている。即ち、蓋部材３６の上下方向の中心軸線上に形成された支持孔３７に挿通されて、支持されている。下側分割軸部材１８の円筒状部３２は、下側案内部材３４の下部から蓋部材３６内に進入している。下側案内部材３４は、その下部に下側分割軸部材１８の円筒状部３２とほぼ同一径の孔３５を中心に有し、その孔３５に円筒状部３２が挿通されている。下側案内部材３４の下端には、円筒状部３２と蓋部材３６の支持孔３７との間に位置するようにシール部材３８ａが配置され、その下側にスリーブ３９が円筒状部３２と蓋部材３６の支持孔３７との間に位置するように配置され、スリーブ３９の更に下側に、円筒状部３２と蓋部材３８の支持孔３７との間に位置するようにシール部材３８ｂが配置されている。蓋部材３６の外周と軸通路１６の拡大部の内周との間にシール部材４０が設けられている。下側案内部材３４の下部の孔３５の周面に円筒状部３２の外周面が接触し、下側分割軸部材１８がその長さ方向に摺動する際に案内される。従って、下側分割軸部材１８と下側案内部材３４との中心軸は一致し、下側分割軸部材１８の摺動性及びシール性は、良好である。 A lower guide member 34 is disposed in the shaft passage 16 so as to cover the valve body 26, the cylindrical portion 28, and the cylindrical portion 32 of the lower divided shaft member 18. The lower guide member 34 is supported by a lid member 36 attached to the opening at the lower end of the valve housing 6 at the outer side of the lower portion thereof. That is, the lid member 36 is supported by being inserted through a support hole 37 formed on the central axis in the vertical direction. The cylindrical portion 32 of the lower split shaft member 18 enters the lid member 36 from the lower portion of the lower guide member 34. The lower guide member 34 has a hole 35 in the lower portion thereof with a hole 35 having substantially the same diameter as that of the cylindrical portion 32 of the lower divided shaft member 18, and the cylindrical portion 32 is inserted through the hole 35. A seal member 38a is disposed at the lower end of the lower guide member 34 so as to be positioned between the cylindrical portion 32 and the support hole 37 of the lid member 36, and a sleeve 39 is disposed below the cylindrical portion 32 and the lid. The seal member 38b is disposed so as to be positioned between the support hole 37 of the member 36, and further below the sleeve 39 so as to be positioned between the cylindrical portion 32 and the support hole 37 of the lid member 38. Has been. A seal member 40 is provided between the outer periphery of the lid member 36 and the inner periphery of the enlarged portion of the shaft passage 16. The outer peripheral surface of the cylindrical portion 32 comes into contact with the peripheral surface of the lower hole 35 of the lower guide member 34 and is guided when the lower divided shaft member 18 slides in the length direction thereof. Accordingly, the central axes of the lower divided shaft member 18 and the lower guide member 34 coincide with each other, and the slidability and the sealing performance of the lower divided shaft member 18 are good.

下側案内部材３４の上端部は、流路１２、１４の間にあり、そこには弁体２６が着座可能に弁座４２が、下側案内部材３４と一体に形成されている。下側案内部材３４と弁座４２とは金属の同時加工によって形成されており、両者の中心軸は一致している。また、弁座４２の内径、例えば図２に示す弁座４２の小径Ｄは、円筒状部３２とほぼ同じに形成されている。 An upper end portion of the lower guide member 34 is located between the flow paths 12 and 14, and a valve seat 42 is integrally formed with the lower guide member 34 so that the valve body 26 can be seated there. The lower guide member 34 and the valve seat 42 are formed by simultaneous processing of metal, and the central axes of both are aligned. Further, the inner diameter of the valve seat 42, for example, the small diameter D of the valve seat 42 shown in FIG. 2 is formed substantially the same as the cylindrical portion 32.

弁体２６が弁座４２に着座している状態で、下側案内部材３４の内外に貫通した貫通孔４４を通じて、流路１２が下側第１案内部材３４の内部の細径の円筒状部２８の付近に連通している。 In a state where the valve body 26 is seated on the valve seat 42, the flow path 12 passes through a through hole 44 that penetrates into and out of the lower guide member 34, and the flow path 12 is a small-diameter cylindrical portion inside the lower first guide member 34. It communicates in the vicinity of 28.

下側分割軸部材１８の上部にある頭部２２と首部２４との境界付近の軸通路１６に流路１４が通じており、弁体２６が弁座４２に着座している状態から、下側分割軸部材１８が弁ハウジング６の上端側に摺動すると弁体２６が弁座４２から離座し、通路１２、１４が通じ、例えばポート８が流入口、ポート１０が流出口とすると、ポート８に供給された高圧流体がポート１０から外部に流出する。 From the state in which the flow path 14 communicates with the axial passage 16 near the boundary between the head portion 22 and the neck portion 24 at the upper portion of the lower divided shaft member 18 and the valve element 26 is seated on the valve seat 42, When the split shaft member 18 slides to the upper end side of the valve housing 6, the valve body 26 moves away from the valve seat 42, and the passages 12 and 14 are communicated. For example, when the port 8 is an inlet and the port 10 is an outlet, the port The high-pressure fluid supplied to 8 flows out from the port 10 to the outside.

下側分割軸部材１８の頭部２２は、上側の分割軸部材２０とＴ溝結合されている。そのため、頭部２２には、図２に拡大して示すようにＴ溝４６が形成されている。Ｔ溝４６は、軸通路１６の中心と同心の水平溝部４６ａと、この水平溝部４６ａの中心に位置し、頭部２２の上端まで垂直に伸びた垂直溝部４６ｂとを有し、これら水平溝部４６ａと垂直溝部４６ｂとの側方に形成された開放部４６ｃとを有している。 The head portion 22 of the lower divided shaft member 18 is joined to the upper divided shaft member 20 by a T-groove. Therefore, a T-groove 46 is formed in the head 22 as shown in an enlarged view in FIG. The T-slot 46 includes a horizontal groove 46a concentric with the center of the shaft passage 16, and a vertical groove 46b that is positioned at the center of the horizontal groove 46a and extends vertically to the upper end of the head 22. The horizontal groove 46a And an opening 46c formed on the side of the vertical groove 46b.

このＴ溝４６に挿入されるＴ字状部４８が後述する上側分割軸部材２０の円筒状部２０ａの下端に形成されている。Ｔ字状部４８は、図２に拡大して示すように垂直溝部４６ｂに挿入される垂直部４８ａを上側分割軸部材２０の円筒状部２０ａの下端に有し、垂直部４８ａの下端に、水平溝部４６ａに挿入される水平部４８ｂを有している。水平部４８ｂの下面４８ｃは、下側分割軸部材１８側に凸である球面に形成され、水平溝部４６ａの平面である底４６ｄに球面接触している。そして、垂直部４８ａの幅寸法（径方向）は、垂直溝部４６ｂの幅寸法より若干小さく、水平部４８ｂの幅寸法は水平溝部４６ａの幅寸法より若干小さく、かつ水平部４８ｂの厚さ寸法(上下方向の長さ)は、水平溝部４６ａの厚さ寸法よりも若干小さく形成されているので、Ｔ字状部４８とＴ溝４６との間には隙間がある。Ｔ溝４６とＴ字状部４８とは、球面接触し、かつ隙間が両者の間にあるので、Ｔ溝４６とＴ字状部４８とは、下側分割軸部材１８及び上側分割軸部材２０同士の傾きを許容するように結合されている。従って、仮に、上側分割軸部材２０が傾いて配置されていたとしても、下側分割軸部材１８をその中心軸付近で下方に押すので、下側分割軸部材１８を傾けること無く、下側分割軸部材１８に一体の弁体２６が弁座４２に確実に着座する。 A T-shaped portion 48 inserted into the T-groove 46 is formed at the lower end of a cylindrical portion 20a of the upper divided shaft member 20 described later. The T-shaped portion 48 has a vertical portion 48a inserted into the vertical groove portion 46b at the lower end of the cylindrical portion 20a of the upper split shaft member 20 as shown in an enlarged view in FIG. It has a horizontal part 48b inserted into the horizontal groove part 46a. A lower surface 48c of the horizontal portion 48b is formed in a spherical surface that is convex toward the lower divided shaft member 18, and is in spherical contact with a bottom 46d that is a flat surface of the horizontal groove portion 46a. The width dimension (radial direction) of the vertical part 48a is slightly smaller than the width dimension of the vertical groove part 46b, the width dimension of the horizontal part 48b is slightly smaller than the width dimension of the horizontal groove part 46a, and the thickness dimension of the horizontal part 48b ( Since the length in the vertical direction is slightly smaller than the thickness dimension of the horizontal groove portion 46 a, there is a gap between the T-shaped portion 48 and the T groove 46. Since the T-groove 46 and the T-shaped portion 48 are in spherical contact with each other and there is a gap between them, the T-groove 46 and the T-shaped portion 48 include the lower divided shaft member 18 and the upper divided shaft member 20. It is combined so as to allow the inclination between each other. Therefore, even if the upper divided shaft member 20 is inclined, the lower divided shaft member 18 is pushed downward near the center axis thereof, so that the lower divided shaft member 18 is not inclined and the lower divided shaft member 18 is not inclined. The valve body 26 integral with the shaft member 18 is securely seated on the valve seat 42.

Ｔ溝４６とＴ字状部４８とは、下側分割軸部材１８及び上側分割軸部材２０の半径方向への移動が許容されるようにも結合されている。上述したように垂直部４８ａの幅寸法は、垂直溝部４６ｂの幅寸法より若干小さく、水平部４８ｂの幅寸法は水平溝部４６ａの幅寸法より若干小さく、かつ水平部４８ｂの厚さ寸法は、水平溝部４６ａの厚さ寸法よりも若干小さく形成されている。従って、上側分割軸部材２０は、上側分割軸部材２０の半径方向及び厚さ方向に若干移動することができる程度にＴ溝４６とＴ字状部４８とによって拘束されている。しかし、上側分割軸部材２０の厚さ方向の移動の程度が上側分割軸部材２０の半径方向の移動の程度よりも小さくなるように、垂直溝部４６ｂと垂直部４８ａとの上側分割軸部材２０の厚さ寸法及び半径方向の寸法と、水平溝部４６ａと水平部４８ｂとの上側分割軸部材２０の厚さ寸法及び半径方向の寸法とが定められている。このように、Ｔ溝４６とＴ字状部４８とは、下側分割軸部材１８及び上側分割軸部材２０の半径方向への移動が許容されるように結合されているので、仮に上側分割軸部材２０と下側分割軸部材１８との中心軸のずれが生じたとしても、そのずれが吸収される。 The T groove 46 and the T-shaped portion 48 are also coupled so that the lower divided shaft member 18 and the upper divided shaft member 20 are allowed to move in the radial direction. As described above, the width dimension of the vertical part 48a is slightly smaller than the width dimension of the vertical groove part 46b, the width dimension of the horizontal part 48b is slightly smaller than the width dimension of the horizontal groove part 46a, and the thickness dimension of the horizontal part 48b is horizontal. It is formed slightly smaller than the thickness dimension of the groove 46a. Therefore, the upper split shaft member 20 is constrained by the T groove 46 and the T-shaped portion 48 to such an extent that the upper split shaft member 20 can move slightly in the radial direction and the thickness direction of the upper split shaft member 20. However, the upper split shaft member 20 of the vertical groove portion 46b and the vertical portion 48a has a degree of movement in the thickness direction of the upper split shaft member 20 smaller than that of the upper split shaft member 20 in the radial direction. The thickness dimension and the radial dimension, and the thickness dimension and the radial dimension of the upper divided shaft member 20 of the horizontal groove portion 46a and the horizontal portion 48b are determined. Thus, the T-slot 46 and the T-shaped portion 48 are coupled so that the lower split shaft member 18 and the upper split shaft member 20 are allowed to move in the radial direction. Even if the center axis shift between the member 20 and the lower divided shaft member 18 occurs, the shift is absorbed.

下側分割軸部材１８の上端に下端が結合されている上側分割軸部材２０の上端は、弁ハウジング６の上端よりも幾分突出している。上側分割軸部材２０は、軸通路１６の上部の拡大部に設けられた上側案内部材５０によって上下方向に案内される。即ち、上側分割軸部材２０の上端と下端との間にある円筒状部２０ａが挿通可能な孔５１が、上側案内部５０の中央に上下方向に沿って形成され、この孔に円筒状部２０ａが挿通されている。円筒状部２０ａと孔５１との間には、上側案内部材５０が有するシール部材５２ａ、５２ｂが、円筒状部２０ａの上下方向に間隔をおいて配置され、その内周面が円筒状部２０ａの周面と接触して案内している。上側のシール部材５２aの上側に、上側案内部材５０が有するスリーブ５３ａが設けられ、シール部材５２ａ、５２ｂの間に、上側案内部材５０が有するスリーブ５３ｂがシール部材５２ｂに対する受けとして設けられ、シール部材５２ｂの下側に、上側案内部材５０が有するスリーブ５３ｃが設けられている。これらスリーブ５３ａ、５３ｃの内周面も、円筒状部２０ａの周面と接触して案内している。また案内部材５０の外周面と軸通路１６の内周面との間にもシール部材５４が配置されている。従って、上側分割軸部材２０と上側案内部材５０との中心軸は一致し、上側分割軸部材２０の摺動性及びシール性は良好である。 The upper end of the upper split shaft member 20, whose lower end is coupled to the upper end of the lower split shaft member 18, protrudes somewhat from the upper end of the valve housing 6. The upper divided shaft member 20 is guided in the vertical direction by an upper guide member 50 provided in an enlarged portion at the upper part of the shaft passage 16. That is, a hole 51 through which the cylindrical portion 20a between the upper end and the lower end of the upper split shaft member 20 can be inserted is formed in the center of the upper guide portion 50 along the vertical direction, and the cylindrical portion 20a is formed in this hole. Is inserted. Between the cylindrical portion 20a and the hole 51, seal members 52a and 52b included in the upper guide member 50 are arranged at intervals in the vertical direction of the cylindrical portion 20a, and the inner peripheral surface thereof is the cylindrical portion 20a. It is guided in contact with the surrounding surface. A sleeve 53a of the upper guide member 50 is provided on the upper side of the upper seal member 52a, and a sleeve 53b of the upper guide member 50 is provided between the seal members 52a and 52b as a receiver for the seal member 52b. A sleeve 53c of the upper guide member 50 is provided below the 52b. The inner peripheral surfaces of the sleeves 53a and 53c are also guided in contact with the peripheral surface of the cylindrical portion 20a. A seal member 54 is also disposed between the outer peripheral surface of the guide member 50 and the inner peripheral surface of the shaft passage 16. Accordingly, the central axes of the upper divided shaft member 20 and the upper guide member 50 coincide with each other, and the slidability and sealing performance of the upper divided shaft member 20 are good.

このように、下側案内部部材３４と下側分割軸部材１８との中心軸を一致させ、上側案内部材５０と上側分割軸部材２０との中心軸を一致させたうえに、下側分割軸部材１８と上側分割軸部材２０とは、下側分割軸部材１８及び上側分割軸部材２０同士の傾き及び下側分割軸部材１８及び上側分割軸部材２０の半径方向への移動をそれぞれ許容するように結合しているので、下側分割軸部材１８及び上側分割軸部材２０からなる軸全体としても、摺動性及びシール性が良好である。 As described above, the lower guide shaft member 34 and the lower split shaft member 18 have the same center axis, the upper guide member 50 and the upper split shaft member 20 have the same center axis, and the lower split shaft. The member 18 and the upper divided shaft member 20 allow inclination of the lower divided shaft member 18 and the upper divided shaft member 20 and movement of the lower divided shaft member 18 and the upper divided shaft member 20 in the radial direction, respectively. Therefore, the entire shaft composed of the lower divided shaft member 18 and the upper divided shaft member 20 also has good slidability and sealability.

円筒状部２０ａの径は、下側分割軸部材１８の円筒状部３２の径とほぼ等しく形成されている。また、上述したように、弁座４２の内径図２に示す弁座４２の小径Ｄは、円筒状部３２とほぼ同じに形成されている。さらに、下側分割軸部材１８の下部である円筒状部３２は、シール部材３８ａ、３８ｂに接触しシールされ、上側分割軸部材２０の円筒状部２０ａは、シール部材５２ａ、５２ｂに接触しシールされている。そして、弁体２６は、これらシール部材３８ａ、３８ｂ、５２ａ、５２ｂの間に配置されている。 The diameter of the cylindrical portion 20 a is formed to be approximately equal to the diameter of the cylindrical portion 32 of the lower divided shaft member 18. Further, as described above, the inner diameter of the valve seat 42 has a small diameter D of the valve seat 42 shown in FIG. Furthermore, the cylindrical part 32 which is the lower part of the lower divided shaft member 18 contacts and is sealed with the seal members 38a and 38b, and the cylindrical part 20a of the upper divided shaft member 20 contacts and seals the seal members 52a and 52b. Has been. And the valve body 26 is arrange | positioned among these sealing members 38a, 38b, 52a, 52b.

弁体２６が弁座４２に着座しているとき、ポート８からの高圧流体の圧力が、弁座４２に着座している弁体２６と、下側分割軸部材１８の円筒状部３２とにかかり、弁座４２に着座している弁体２６に圧力によって上方向に加わる力と、円筒状部３２に圧力によって下方向に加わる力とは、弁座４２の内径と円筒状部３２の径とがほぼ等しいので、互いに相殺され、圧力によって弁体２６を上側に押す力は大きく軽減される。弁体２６が弁座４２から離座したとき、下側分割軸部材１８の円筒状部３２と上側分割軸部材２０の円筒状部２０ａは、ほぼ同じ径であり、これらの部分に圧力がかかるので、それぞれ上下逆向きの力を受けて、これらの力が互いに相殺されることによって、下側分割軸部材１８及び上側分割軸部材２０がほぼ平衡状態に保たれ、流体流路を流れる流体が高圧の場合でも、その圧力が下側分割軸部材１８及び上側分割軸部材２０に対して、これらの軸線方向のうち上下いずれか一方向にのみ偏って作用することが軽減される。 When the valve body 26 is seated on the valve seat 42, the pressure of the high-pressure fluid from the port 8 is applied to the valve body 26 seated on the valve seat 42 and the cylindrical portion 32 of the lower split shaft member 18. The force applied upward to the valve body 26 seated on the valve seat 42 by the pressure and the force applied downward to the cylindrical portion 32 by the pressure are the inner diameter of the valve seat 42 and the diameter of the cylindrical portion 32. Are substantially equal to each other, and cancel each other, and the force that pushes the valve body 26 upward by the pressure is greatly reduced. When the valve body 26 is separated from the valve seat 42, the cylindrical portion 32 of the lower divided shaft member 18 and the cylindrical portion 20a of the upper divided shaft member 20 have substantially the same diameter, and pressure is applied to these portions. Therefore, by receiving forces in the opposite directions and canceling each other, the lower divided shaft member 18 and the upper divided shaft member 20 are maintained in an almost equilibrium state, and the fluid flowing through the fluid flow path is Even in the case of high pressure, it is reduced that the pressure acts on the lower divided shaft member 18 and the upper divided shaft member 20 in only one of the upper and lower directions of these axial directions.

１つの下側分割軸部材１８に１つの下側案内部材３４が設けられているので、下側分割軸部材１８と下側案内部材３４との中心軸は、高精度に合わせられる。同様に、１つの上側分割軸部材２０に１つの上側案内部材５０が設けられているので、上側分割軸部材２０と上側案内部材５０（詳細には、シール部材５２ａ、５２ｂ、スリーブ５３ａ、５３ｃ）との中心軸は、高精度に合わせられる。 Since one lower guide member 34 is provided on one lower split shaft member 18, the central axes of the lower split shaft member 18 and the lower guide member 34 can be adjusted with high accuracy. Similarly, since one upper guide member 50 is provided on one upper split shaft member 20, the upper split shaft member 20 and the upper guide member 50 (specifically, seal members 52a and 52b and sleeves 53a and 53c). The center axis is aligned with high accuracy.

さらに下側分割軸部材１８と上側分割軸部材２０とは、半径方向に移動が可能にＴ溝結合されているので、たとえ下側分割軸部材１８の中心軸と上側分割軸部材２０の中心軸線との間にずれがあっても、そのずれは、半径方向への移動によって吸収される。また、下側分割軸部材１８と上側分割軸部材２０とは球面接触しているので、下側分割軸部材１８、上側分割軸部材２０同士は傾き可能であり、下側分割軸部材１８の弁体２６を弁座４２に着座させる際に、上側分割軸部材２０が少し傾いていても、上側分割軸部材２０が、下側分割軸部材１８をその中心軸付近で下方に押すので、下側分割軸部材１８を傾けること無く、弁体２６が弁座４２に確実に着座する。そのうえ、下側案内部材３４に同時金属加工によって弁座４２が形成されているので、下側案内部材３４の中心軸線と弁座４２の中心軸線とのずれは無い。 Further, since the lower divided shaft member 18 and the upper divided shaft member 20 are T-groove coupled so as to be movable in the radial direction, even if the central axis of the lower divided shaft member 18 and the central axis of the upper divided shaft member 20 are combined. Even if there is a deviation between the two, the deviation is absorbed by the movement in the radial direction. Further, since the lower divided shaft member 18 and the upper divided shaft member 20 are in spherical contact with each other, the lower divided shaft member 18 and the upper divided shaft member 20 can be tilted, and the valve of the lower divided shaft member 18 When the body 26 is seated on the valve seat 42, even if the upper split shaft member 20 is slightly inclined, the upper split shaft member 20 pushes the lower split shaft member 18 downward in the vicinity of its central axis, so that the lower side The valve body 26 is securely seated on the valve seat 42 without tilting the split shaft member 18. In addition, since the valve seat 42 is formed on the lower guide member 34 by simultaneous metal processing, there is no deviation between the central axis of the lower guide member 34 and the central axis of the valve seat 42.

そして、弁体２６が設けられた下側分割軸部材１８と弁体２６とは、一体に形成され、同時機械加工可能であるので、両者の中心軸は一致している。また弁座４２が設けられた下側案内部材３４と弁座４２とも、一体に形成され、同時機械加工可能であるので、両者の中心軸は一致している。このような弁座４２が一体に設けられた下側案内部材３４に、弁体２６が一体に設けられた下側分割軸部材１８を挿通しているので、弁座４２の中心軸と、弁体２６の中心軸とにずれが無く、シート性がさらに良好になる。 Since the lower split shaft member 18 provided with the valve body 26 and the valve body 26 are formed integrally and can be machined simultaneously, the central axes of both are coincident. Further, since the lower guide member 34 provided with the valve seat 42 and the valve seat 42 are integrally formed and can be simultaneously machined, the central axes of the both coincide with each other. Since the lower split shaft member 18 with the valve body 26 provided integrally is inserted into the lower guide member 34 provided with the valve seat 42 integrally, the central axis of the valve seat 42 and the valve There is no deviation from the central axis of the body 26, and the sheet property is further improved.

弁ハウジング６の上端には、上述した駆動部４が設けられている。駆動部４は、弁ハウジング６にねじ結合されている結合板５５と結合されている。駆動部４の構成は、例えば特許第６０５９３９１号に開示されているアクチュエータとほぼ同一の構造で、駆動部ハウジング５６と駆動部カバー５８とを有し、これらの内部にシリンダ６０が形成されている。このシリンダ６０内にピストン６２が、上下方向に摺動可能に配置され、ばね６４によって下側、即ち弁本体２側に押圧されている。ピストン６２には、シリンダ６０から、駆動部ハウジング５６の下部に形成した軸結合室６６内に突出した結合軸６８が形成されている。この結合軸６８は、分割軸部材１８、２０とほぼ同軸に配置されている。軸結合室６６とシリンダ６０との境界の壁が結合軸６８の案内部材として機能する。 The drive unit 4 described above is provided at the upper end of the valve housing 6. The drive unit 4 is coupled to a coupling plate 55 that is screw-coupled to the valve housing 6. The configuration of the drive unit 4 is substantially the same structure as the actuator disclosed in, for example, Japanese Patent No. 6059391, and has a drive unit housing 56 and a drive unit cover 58, and a cylinder 60 is formed inside these. . A piston 62 is disposed in the cylinder 60 so as to be slidable in the vertical direction, and is pressed downward by the spring 64, that is, the valve body 2 side. The piston 62 is formed with a coupling shaft 68 that protrudes from the cylinder 60 into a shaft coupling chamber 66 formed in the lower portion of the drive unit housing 56. The coupling shaft 68 is disposed substantially coaxially with the split shaft members 18 and 20. A boundary wall between the shaft coupling chamber 66 and the cylinder 60 functions as a guide member for the coupling shaft 68.

軸結合室６６内において、結合軸６８は、上側分割軸部材２０とＴ溝結合されている。そのため、上側分割軸部材２０の上端にはＴ字状部７０が形成され、結合軸６８の下端には、Ｔ溝７２が形成されている。なお、Ｔ字状部７０とＴ溝部７２とは、下側分割軸部材１８と上側分割軸部材２０との結合と同様に、長さ方向の移動の程度が半径方向の移動の程度よりも小さくなるように長さ寸法及び半径方向の寸法が定められている。また、ピストン６２の上側の中央には、駆動検出用の円筒状のインジケータ７３が、駆動部カバー５８から突出可能に設けられており、駆動部４が動作した時、インジケータ７３は、駆動部カバー５８から突出し、駆動部４が動作を停止した時、駆動部カバー５８内に後退する。 In the shaft coupling chamber 66, the coupling shaft 68 is coupled to the upper divided shaft member 20 by a T groove. Therefore, a T-shaped portion 70 is formed at the upper end of the upper split shaft member 20, and a T-groove 72 is formed at the lower end of the coupling shaft 68. Note that the T-shaped portion 70 and the T-groove portion 72 have a degree of movement in the length direction smaller than a degree of movement in the radial direction, similarly to the coupling of the lower divided shaft member 18 and the upper divided shaft member 20. Thus, the length dimension and the radial dimension are determined. In addition, a cylindrical indicator 73 for driving detection is provided in the center of the upper side of the piston 62 so as to be able to protrude from the drive unit cover 58, and when the drive unit 4 is operated, the indicator 73 is displayed on the drive unit cover. When the drive unit 4 stops operating, the drive unit 4 retracts into the drive unit cover 58.

シリンダ６０のピストン６２を挟んでばね６４とは反対側には、駆動部ハウジング５６に形成した駆動流体供給部７４及び駆動流体通路７６を介して駆動流体の供給が可能で、駆動流体が供給されたとき、ピストン６２がばね６４の押圧力に抗しながら、上昇し、これにつれて、上側分割軸部材２０、下側分割軸部材１８が上昇し、弁体２６が弁座４２から離座し、流体ポート８側の高圧流体が、流体ポート１０から排出される。 On the opposite side of the piston 62 of the cylinder 60 from the spring 64, the driving fluid can be supplied via the driving fluid supply portion 74 and the driving fluid passage 76 formed in the driving portion housing 56, and the driving fluid is supplied. Then, the piston 62 rises while resisting the pressing force of the spring 64, and accordingly, the upper divided shaft member 20 and the lower divided shaft member 18 are raised, and the valve body 26 is separated from the valve seat 42, The high-pressure fluid on the fluid port 8 side is discharged from the fluid port 10.

上述したように、この開閉弁は、弁体２６が弁座４２に着座及び離座しているときのいずれにも、下側分割軸部材１８及び上側分割軸部材２０にこれらの軸線方向のうち上下いずれか一方向にのみ偏って流体圧による力が作用することを軽減しているので、駆動部４のばね６４に押圧力の大きな大型のものを使用する必要が無く、駆動部４を小型化することができる。また、上述したように下側分割軸部材１８及び上側分割軸部材２０からなる軸の摺動性及びシール性が良好であるので、駆動部４は大きな駆動力を発生する必要が無く、この観点からも駆動部４を小型化できる。 As described above, this on-off valve is provided in the axial direction of the lower divided shaft member 18 and the upper divided shaft member 20 regardless of whether the valve body 26 is seated on or separated from the valve seat 42. Since it is reduced that the force due to the fluid pressure is biased only in one of the upper and lower directions, it is not necessary to use a large spring with a large pressing force for the spring 64 of the drive unit 4, and the drive unit 4 can be made compact. Can be Further, as described above, since the slidability and sealing performance of the shaft composed of the lower divided shaft member 18 and the upper divided shaft member 20 are good, the drive unit 4 does not need to generate a large driving force. Therefore, the drive unit 4 can be downsized.

この開閉弁の組み立ては、弁ハウジング６内に下側案内部材３４、蓋部材３６を配置し、弁ハウジング６の外部で下側分割軸部材１８と上側分割軸部材２０とをＴ溝結合する。このとき、上側分割軸部材２０のＴ字状部７０は、上側分割軸部材２０から外されている。結合された下側分割軸部材１８と上側分割軸部材２０とを弁ハウジング６内の下側案内部材３４に挿通し、その後に上側案内部材５０を弁ハウジング６に配置し、次に結合板５５を弁ハウジング６の上端に配置する。このとき、Ｔ字状部７０を上側分割軸部材２０に取り付け、上側案内部材５０の上面付近にある正規の位置よりもＴ字状部７０を幾分突出させた状態として、軸結合室６６内で、Ｔ字状部７０が駆動部４の結合軸６８のＴ字溝７２に挿通されるように、駆動部４を弁ハウジング６の上端の側方からスライドさせる。その後、結合板５５を介して弁ハウジング６を駆動部４にボルトによって結合する。 In assembling this on-off valve, the lower guide member 34 and the lid member 36 are disposed in the valve housing 6, and the lower divided shaft member 18 and the upper divided shaft member 20 are joined to each other by a T groove outside the valve housing 6. At this time, the T-shaped portion 70 of the upper divided shaft member 20 is removed from the upper divided shaft member 20. The combined lower divided shaft member 18 and upper divided shaft member 20 are inserted into the lower guide member 34 in the valve housing 6, and then the upper guide member 50 is disposed in the valve housing 6, and then the connecting plate 55. Is arranged at the upper end of the valve housing 6. At this time, the T-shaped portion 70 is attached to the upper divided shaft member 20, and the T-shaped portion 70 is protruded somewhat from the normal position near the upper surface of the upper guide member 50. Then, the drive part 4 is slid from the side of the upper end of the valve housing 6 so that the T-shaped part 70 is inserted into the T-shaped groove 72 of the coupling shaft 68 of the drive part 4. Thereafter, the valve housing 6 is coupled to the drive unit 4 by a bolt via the coupling plate 55.

なお、上側分割軸部材２０と結合軸６８との結合においても、上記と同様にＴ字状部７０の頭部を球面に構成し、結合軸６８のＴ字溝７２の底に球面接触させることもできる。 In addition, when the upper divided shaft member 20 and the coupling shaft 68 are coupled, the head of the T-shaped portion 70 is formed into a spherical surface in the same manner as described above, and spherical contact is made with the bottom of the T-shaped groove 72 of the coupling shaft 68. You can also.

下側分割軸部材１８の下端には、外部に設けた検出スイッチ７８を動作させるための検出体８０が設けられている。従って、弁体２６が弁座４２から離座して、下側分割軸部材１８が上昇したことを、外部から検出することができる。なお、検出スイッチ７８は、検出体８０によって直接に駆動されるタイプであってもよいし、検出スイッチ７８の近傍に位置した検出体８０が検出スイッチ７８の近傍から離れたり近づいたりしたことを検出するタイプであってもよい。また、このタイプの場合、検出体８０を設けなくても、下側分割軸部材１８の移動を検出することも可能である。このように、検出スイッチ７８の動作によって、この開閉弁が動作したことを電気的に検出することが可能で、さらにインジケータ７３の突出により目視によって検出することもできる。また、蓋部材３６と検出スイッチ７８とをカバーで覆えば、検出体８０と検出スイッチ７８との間にゴミのような異物が入ることを防止でき、異物によって検出スイッチ７８が誤動作することを防止できる。 A detection body 80 for operating a detection switch 78 provided outside is provided at the lower end of the lower divided shaft member 18. Therefore, it can be detected from the outside that the valve body 26 is separated from the valve seat 42 and the lower divided shaft member 18 is raised. The detection switch 78 may be a type that is directly driven by the detection body 80, or detects that the detection body 80 located in the vicinity of the detection switch 78 has moved away from or approached the vicinity of the detection switch 78. It may be the type to do. In the case of this type, it is also possible to detect the movement of the lower divided shaft member 18 without providing the detection body 80. In this way, it is possible to electrically detect that the on-off valve has been operated by the operation of the detection switch 78, and it is also possible to detect visually by the protrusion of the indicator 73. Further, if the cover member 36 and the detection switch 78 are covered with a cover, foreign matter such as dust can be prevented from entering between the detection body 80 and the detection switch 78, and the detection switch 78 can be prevented from malfunctioning due to the foreign matter. it can.

第２の実施形態の開閉弁の一部を図３に示す。第２の実施形態の開閉弁では、下側分割軸部材１８と上側分割軸部材２０との結合が、下側分割軸部材１８と上側分割軸部材２０とのピン結合によって行われている。他の構成は、第１の実施形態の開閉弁と同様であるので、詳細な説明は省略する。 A part of the on-off valve of the second embodiment is shown in FIG. In the on-off valve of the second embodiment, the lower divided shaft member 18 and the upper divided shaft member 20 are coupled by pin coupling between the lower divided shaft member 18 and the upper divided shaft member 20. The other configuration is the same as that of the on-off valve of the first embodiment, and thus detailed description thereof is omitted.

具体的には、ピン結合は、上側分割軸部材２０の下端部に形成した頭部８２を下側分割軸部材１８の頭部２２内に形成した挿入孔８４の上方から挿入し、下側分割軸部材１８の直径方向に沿って形成したピン孔８６に頭部８２を通過するようにピン８７を挿通することによって行われている。頭部８２の下面８２ａは、下側分割軸部材１８側に凸である球面に形成され、挿入孔８４の平面の底８４ａに球面接触している。即ち、上側分割軸部材２０と下側分割軸部材１８とは、第１の実施形態のＴ溝結合と同様に上側分割軸部材２０、下側分割軸部材１８同士の傾斜を許容するように結合されている。さらに、このピン結合は、第１の実施形態のＴ溝結合と同様に下側分割軸部材１８、上側分割軸部材２０の半径方向の移動を許容するようにも拘束され、これら分割軸部材１８、２０の長さ方向への移動が小さくなるように、即ち、下側分割軸部材１８、上側分割軸部材２０の半径方向へ、長さ方向よりも移動しやすいように、ピン８７の径、挿入孔８４、ピン孔８６の径などが選択されている。従って、第１の実施形態の開閉弁と同様な効果を奏する。 Specifically, the pin coupling is performed by inserting a head portion 82 formed at the lower end portion of the upper divided shaft member 20 from above the insertion hole 84 formed in the head portion 22 of the lower divided shaft member 18, and dividing the lower portion. The pin 87 is inserted into a pin hole 86 formed along the diameter direction of the shaft member 18 so as to pass through the head 82. The lower surface 82 a of the head 82 is formed in a spherical surface that is convex toward the lower divided shaft member 18, and is in spherical contact with the flat bottom 84 a of the insertion hole 84. In other words, the upper divided shaft member 20 and the lower divided shaft member 18 are coupled so as to allow the upper divided shaft member 20 and the lower divided shaft member 18 to be inclined as in the T-groove coupling of the first embodiment. Has been. Further, this pin connection is also constrained to allow the lower divided shaft member 18 and the upper divided shaft member 20 to move in the radial direction in the same manner as the T groove connection of the first embodiment. , The diameter of the pin 87 so that the movement in the length direction of 20 becomes smaller, that is, the radial direction of the lower divided shaft member 18 and the upper divided shaft member 20 is easier to move than in the length direction. The diameters of the insertion hole 84 and the pin hole 86 are selected. Therefore, the same effect as the on-off valve of the first embodiment is obtained.

第３の実施形態の開閉弁の一部を図４に示す。第３の実施形態の開閉弁では、下側分割軸部材１８と上側分割軸部２０との結合が緩やかなねじ結合によって行われている。他の構成は、第１の実施形態の開閉弁と同様であるので、詳細な説明は省略する。 A part of the on-off valve of the third embodiment is shown in FIG. In the on-off valve of the third embodiment, the lower divided shaft member 18 and the upper divided shaft portion 20 are coupled by loose screw coupling. The other configuration is the same as that of the on-off valve of the first embodiment, and thus detailed description thereof is omitted.

緩やかなねじ結合は、第１の実施形態のＴ溝結合と同様に下側分割軸部材１８、上側分割軸部材２０の半径方向の移動が可能なように結合したもので、上側分割軸部材２０の下端の周囲に、雄ねじ８８を形成し、下側分割軸部材１８の頭部２２の上端から、その内部に形成した雌ねじ９０に完全に螺合させるのではなく、緩やかに螺合させてある。即ち、雄ねじ８８の山と雌ねじ９０の谷との間に隙間があり、雄ねじ８８の谷と雌ねじ９０の山との間に隙間がある。このように緩やかにねじ結合させているので、第１の実施形態のＴ溝結合と同様に下側分割軸部材１８、上側分割軸部材２０の半径方向の移動が、これら分割軸部材１８、２０の長さ方向への移動よりも大きくなるし、上側分割軸部材２０、下側分割軸部材１８同士の傾斜を許容する。従って、下側分割軸部材１８、上側分割軸部材２０の半径方向へ移動しやすいので、第１の実施形態の開閉弁と同様な効果を奏する。但し、雄ねじ８８や雌ねじ９０が回ることを防止する回り止め（図示せず）を別途設けている。 The loose screw connection is performed so that the lower divided shaft member 18 and the upper divided shaft member 20 can move in the radial direction in the same manner as the T groove connection of the first embodiment. A male screw 88 is formed around the lower end of the lower divided shaft member, and is not screwed completely into the female screw 90 formed therein from the upper end of the head portion 22 of the lower divided shaft member 18 but is loosely screwed. . That is, there is a gap between the peak of the male screw 88 and the valley of the female screw 90, and there is a gap between the valley of the male screw 88 and the peak of the female screw 90. Since the screws are loosely coupled in this manner, the lower divided shaft member 18 and the upper divided shaft member 20 are moved in the radial direction in the same manner as the T-groove coupling of the first embodiment. And the inclination of the upper divided shaft member 20 and the lower divided shaft member 18 is allowed. Therefore, since the lower split shaft member 18 and the upper split shaft member 20 are easily moved in the radial direction, the same effect as the on-off valve of the first embodiment can be obtained. However, a rotation stopper (not shown) for preventing the male screw 88 and the female screw 90 from rotating is provided separately.

上記の各実施形態では、駆動部４が非動作状態で、弁座４２に弁体２６が着座し、駆動部４が動作した時に弁座４２から弁体２６が離座するように構成したが、逆に、駆動部４が非動作状態で弁座４２から弁体２６が離座しており、駆動部４が動作した時弁体２６が弁座４２に着座するように構成することもできる。また、上記の各実施形態では、駆動部４によって軸を駆動するように構成したが、駆動部４を除去し、代わりに手動によって軸を操作する操作部を設けることもできる。上記の各実施形態では、ポート８を流入口、ポート１０を流出口として使用する状態を説明したが、逆に、ポート８を流出口、ポート１０を流入口として使用することもできる。 In each of the embodiments described above, the valve body 26 is seated on the valve seat 42 when the driving unit 4 is in an inoperative state, and the valve body 26 is separated from the valve seat 42 when the driving unit 4 is operated. On the contrary, the valve body 26 is separated from the valve seat 42 when the drive unit 4 is in an inoperative state, and the valve body 26 can be configured to be seated on the valve seat 42 when the drive unit 4 is operated. . In each of the above-described embodiments, the shaft is driven by the drive unit 4. However, the drive unit 4 may be removed and an operation unit for manually operating the shaft may be provided instead. In each of the above embodiments, the state in which the port 8 is used as the inlet and the port 10 is used as the outlet has been described, but conversely, the port 8 can be used as the outlet and the port 10 can be used as the inlet.

上記の各実施形態では、検出体８０を設けたが、場合によっては除去することもできるし、下側分割軸部材１８と一体に検出体を形成することもできる。また、蓋部材３６と検出スイッチ７８とをカバーで覆うことによって、検出体８０と検出スイッチ７８との間にゴミのような異物が入ることを防止して、検出スイッチ７８が誤動作することを In each of the above embodiments, the detection body 80 is provided. However, the detection body 80 may be removed depending on circumstances, and the detection body may be formed integrally with the lower divided shaft member 18. Further, by covering the lid member 36 and the detection switch 78 with a cover, foreign matter such as dust can be prevented from entering between the detection body 80 and the detection switch 78, and the detection switch 78 can malfunction.

第１の実施形態では、図２に示すように、水平部４８ｂの下面４８ｃを下側分割軸部材１８側に凸である球面に形成し、水平溝部４６ａの底４６ｄを平面に形成したが、逆に、水平部４８ｂの下面４８ｃを平面に形成し、水平溝部４６ａの底４６ｄを上側分割軸部材２０側に凸である球面に形成することもできる。上記の各実施形態では、前記分割軸部材同士の傾き及び前記軸の半径方向の移動双方を許容するように構成したが、いずれか一方のみを許容するように構成することもできる。上記の各実施形態では、軸を下側分割軸部材１８と上側分割軸部材２０との２本に分割形成したが、さらに多くの本数に分割形成することもできる。 In the first embodiment, as shown in FIG. 2, the lower surface 48c of the horizontal portion 48b is formed in a spherical surface that is convex toward the lower divided shaft member 18, and the bottom 46d of the horizontal groove portion 46a is formed in a plane. Conversely, the lower surface 48c of the horizontal portion 48b may be formed as a flat surface, and the bottom 46d of the horizontal groove portion 46a may be formed into a spherical surface that is convex toward the upper divided shaft member 20 side. In each of the embodiments described above, both the inclination of the divided shaft members and the movement of the shaft in the radial direction are allowed. However, only one of them may be allowed. In each of the above-described embodiments, the shaft is divided into two parts, that is, the lower divided shaft member 18 and the upper divided shaft member 20, but can be divided into a larger number.

また、上記の各実施形態では、１つの弁体が１つの弁座に着座、離座する開閉弁に本発明を実施したが、１つのポートを、２つのポートのうち選択されたポートに接続したり、２つのポートのうち選択されたものを、１つの別のポートに接続したりする三方切換弁に本発明を実施することもできる。例えば次のように構成することもできる。弁本体部の軸通路に、その軸通路よりも細径の軸を配置し、軸通路の内周面と軸の外周面との間を流体の通路として使用する。この軸の両端部側でそれぞれシール部材によって軸通路に対して軸をシールする。これらシール部材の間に位置するように、弁体を軸に設ける。この弁体を軸の長さ方向に挟んで軸の一端側と他端側とにそれぞれ位置するように、一端側弁座と他端側弁座を軸通路に設ける。弁体が一端側弁座に着座しているとき、他端側弁座から弁体は離座し、軸がその長さ方向に摺動して弁体が一端側弁座から離座したとき、他端側弁座に着座する。２つの弁座の間に位置し、軸通路に連通するように第１のポートを弁本体部に設けてある。軸の一端側に軸通路と連通するように第２のポートを設け、第２のポートは、弁体が一端側弁座に着座し、他端側弁座から離座しているとき、第１のポートと遮断され、弁体が一端側弁座から離座し、他端側弁座に着座しているとき、一端側弁座及び軸通路を介して第１のポートと連通する。軸の他端側で軸通路と連通するように第３のポートを本体部に設けてある。第３のポートは、弁体が一端側弁座に着座し、他端側弁座から離座しているとき、他端側弁座及び軸通路を介して第１のポートと連通し、弁体が一端側弁座から離座し、他端側弁座に着しているとき、第１のポートと遮断される。軸の一端側と他端側とのシール部材に接している軸の部分の径は、ほぼ等しく、かつ一端側及び他端側の弁座の内径とほぼ等しく形成されている。軸は、複数の分割軸部材に分割され、各分割軸部材は、それぞれに対応して設けた案内部材によって摺動方向に案内され、各分割軸部材の結合は、分割軸部材同士の傾き及び前記軸の半径方向の移動の一方または双方を許容するように行われている。上記の場合、弁体は、１つだけ設けたが、２つの分割軸部材それぞれに弁体を設け、一方の弁体は一端部の弁座に対して着座及び離座するように構成し、他方の弁体は他端部側の弁座に対して着座及び離座するように構成することもできる。 In each of the above embodiments, the present invention is applied to an on-off valve in which one valve element is seated on and separated from one valve seat, but one port is connected to a selected port of the two ports. Alternatively, the present invention can be implemented in a three-way switching valve that connects a selected one of two ports to one other port. For example, it can also be configured as follows. A shaft having a diameter smaller than that of the shaft passage is disposed in the shaft passage of the valve body, and the space between the inner peripheral surface of the shaft passage and the outer peripheral surface of the shaft is used as a fluid passage. The shaft is sealed with respect to the shaft passage by seal members at both ends of the shaft. A valve body is provided on the shaft so as to be positioned between the seal members. The one end side valve seat and the other end side valve seat are provided in the shaft passage so as to be positioned on one end side and the other end side of the shaft, respectively, across the valve body in the length direction of the shaft. When the valve body is seated on the valve seat on one end, the valve body is separated from the valve seat on the other end, and when the shaft slides in the length direction and the valve body is separated from the valve seat on one end Sit on the other end side valve seat. A first port is provided in the valve main body so as to be positioned between the two valve seats and communicate with the shaft passage. A second port is provided on one end side of the shaft so as to communicate with the shaft passage. When the valve body is seated on the one end side valve seat and separated from the other end side valve seat, the second port is When the valve body is disconnected from the one port side, is separated from the one end side valve seat, and is seated on the other end side valve seat, it communicates with the first port via the one end side valve seat and the shaft passage. A third port is provided in the main body so as to communicate with the shaft passage on the other end side of the shaft. The third port communicates with the first port via the other end side valve seat and the shaft passage when the valve body is seated on the one end side valve seat and separated from the other end side valve seat, When the body is separated from the valve seat on one end and is seated on the valve seat on the other end, it is disconnected from the first port. The diameters of the portions of the shaft that are in contact with the seal member on one end side and the other end side of the shaft are substantially equal, and are approximately equal to the inner diameters of the valve seats on the one end side and the other end side. The shaft is divided into a plurality of divided shaft members, and each divided shaft member is guided in a sliding direction by a guide member provided corresponding to each of the divided shaft members. This is done to allow one or both of the radial movements of the shaft. In the above case, only one valve body is provided, but each of the two split shaft members is provided with a valve body, and one valve body is configured to be seated and separated from the valve seat at one end, The other valve body may be configured to be seated and separated from the valve seat on the other end side.

２弁本体
４駆動部
６弁ハウジング
８流入口
１０流出口
１２１４流路
１６軸通路
１８下側分割軸部材
２０上側分割軸部材
２０ａ上側分割軸部材の円筒状部
２６弁体
３２下側分割軸部材の円筒状部
３８ａ、３８ｂ下側分割軸部材に対するシール部材
３４下側案内部材
４２弁座
５０上側案内部材
４６Ｔ溝
４８Ｔ字状部
５２ａ５２ｂ上側分割軸部材に対するシール部材 2 Valve body 4 Drive unit 6 Valve housing 8 Inlet 10 Outlet 12 14 Channel 16 Axis passage 18 Lower divided shaft member 20 Upper divided shaft member 20a Cylindrical portion of upper divided shaft member 26 Valve body 32 Lower divided shaft Cylindrical portions 38a, 38b of the member Seal member for the lower divided shaft member 34 Lower guide member 42 Valve seat 50 Upper guide member 46 T groove 48 T-shaped portion 52a 52b Seal member for the upper divided shaft member

Claims

弁本体部と、
前記弁本体部内の一端部と他端部との間の軸通路に配置された軸と、
前記弁本体部における前記軸通路から離れたそれぞれの位置に設けられ、前記弁本体部の外界にそれぞれが連通している少なくとも２つの流体のポートと、
前記少なくとも２つの流体のポートを前記軸通路と連通するように前記本体部内に設けられた少なくとも２つの流路と、
前記軸通路における前記少なくとも２つの流路間に設けられた少なくとも１つの弁座と、
前記軸に設けられ、前記軸の進退に応じて、前記少なくとも１つの弁座に着座及び離座する少なくとも１つの弁体とを、
有する弁において、
前記軸とは別個に形成された軸進退手段が、前記弁本体部の外部から前記軸を前記軸通路に沿って手動または自動で進退させるように、前記軸の一端部に結合され、
前記軸は、複数の分割軸部材によって構成され、前記複数の分割軸部材は、それぞれが前記軸通路内に前記軸通路に沿って連続的に位置し、
前記軸の一端部の側にある前記軸分割部材と前記軸の他端部の側にある前記軸分割部材とにそれぞれ対応してシール部材が設けられ、これらシール部材が、これらシール部材の間にある前記軸の長手方向部分をシールし、
前記一端部の側のシール部材と前記他端部の側のシール部材とによってそれぞれシールされている前記軸の部分の径と、前記弁座の内径とがほぼ等しく形成され、
前記複数の分割軸部材は、前記分割軸部材同士の傾き及び前記軸の半径方向の移動の一方または双方を許容するように結合された複数の案内部材によって案内されている
弁。 A valve body,
A shaft disposed in an axial passage between one end and the other end in the valve body;
At least two fluid ports provided at respective positions away from the shaft passage in the valve body, each communicating with the outside of the valve body;
At least two flow paths provided in the main body so as to communicate the at least two fluid ports with the shaft passage;
At least one valve seat provided between the at least two flow paths in the axial passage;
At least one valve body provided on the shaft and seated on and away from the at least one valve seat in accordance with advancement and retraction of the shaft;
Having a valve
A shaft advancing / retracting means formed separately from the shaft is coupled to one end of the shaft so that the shaft is advanced or retracted manually or automatically along the shaft path from the outside of the valve body portion,
The shaft is constituted by a plurality of divided shaft members, and the plurality of divided shaft members are continuously located along the shaft passage in the shaft passage,
A seal member is provided corresponding to each of the shaft split member on one end side of the shaft and the shaft split member on the other end side of the shaft, and the seal members are disposed between the seal members. Sealing the longitudinal part of the shaft at
The diameter of the portion of the shaft that is sealed by the sealing member on the one end side and the sealing member on the other end side is substantially equal to the inner diameter of the valve seat,
The plurality of split shaft members are guided by a plurality of guide members coupled so as to allow one or both of inclination of the split shaft members and movement of the shaft in the radial direction .

弁本体部と、
前記弁本体部内の一端部と他端部との間の軸通路に配置され、前記一端部の側と前記他端部の側とでシール部材によってシールされた軸と、
前記弁本体部における前記軸通路から離れたそれぞれの位置に設けられ、前記弁本体部の外界にそれぞれが連通している少なくとも２つの流体のポートと、
前記少なくとも２つの流体のポートを前記軸通路と連通するように前記本体部内に設けられた少なくとも２つの流路と、
前記軸通路における前記少なくとも２つの流路間に設けられた少なくとも１つの弁座と、
前記軸の前記一端部の側と前記他端部の側とのシール部材の間に設けられ、前記軸の進退に応じて、前記少なくとも１つの弁座に着座及び離座する少なくとも１つの弁体とを、
有し、前記一端部の側と前記他端部の側とのシール部材によってそれぞれシールされている前記軸の部分の径と、前記弁座の内径とがほぼ等しく形成された弁において、
前記軸は、複数の分割軸部材によって構成され、前記複数の分割部材は、それぞれが前記軸通路内に前記軸通路に沿って連続的に位置し、前記分割軸部材同士の傾き及び前記軸の半径方向の移動の一方または双方を許容するように結合され、
前記複数の分割軸部材は、前記弁本体部内に前記複数の分割軸部材それぞれに対応して設けられた複数の案内部材によって案内され、
前記少なくとも１つの弁体が設けられた前記分割軸部材と前記少なくとも１つの弁体とが一体に形成され、前記複数の案内部材のうち、前記少なくとも１つの弁体が設けられた前記分割軸部材に対応するものに、前記少なくとも１つの弁座が一体に設けられている弁 A valve body,
A shaft disposed in a shaft passage between one end and the other end in the valve body, and sealed by a seal member on the one end side and the other end side;
At least two fluid ports provided at respective positions away from the shaft passage in the valve body, each communicating with the outside of the valve body;
At least two flow paths provided in the main body so as to communicate the at least two fluid ports with the shaft passage;
At least one valve seat provided between the at least two flow paths in the axial passage;
At least one valve body that is provided between the one end portion side and the other end portion side of the shaft, and is seated on and separated from the at least one valve seat in accordance with advancement and retraction of the shaft. And
A valve in which the diameter of the portion of the shaft that is sealed by the sealing member on the one end side and the other end side is formed substantially equal to the inner diameter of the valve seat,
The shaft is constituted by a plurality of divided shaft members, and each of the plurality of divided members is continuously located along the shaft passage in the shaft passage, and the inclination of the divided shaft members and the shaft Combined to allow one or both of the radial movements,
The plurality of split shaft members are guided by a plurality of guide members provided in the valve main body corresponding to the plurality of split shaft members,
The split shaft member provided with the at least one valve body is integrally formed with the at least one valve body, and the split shaft member provided with the at least one valve body among the plurality of guide members. In which the at least one valve seat is integrally provided

請求項１または２記載の弁において、前記弁体が設けられている前記分割軸部材は、前記弁本体部の他端部付近に端部があり、前記弁体が設けられている前記分割軸部材は、その移動が前記弁本体部の外部から検出可能に構成されている弁。 3. The valve according to claim 1, wherein the split shaft member provided with the valve body has an end near the other end of the valve main body, and the split shaft provided with the valve body. 4. The member is a valve configured to detect movement of the member from the outside of the valve main body.

請求項３記載の弁において、前記弁体が設けられている前記分割軸部材は、前記弁本体部の外部に突出する検出体を有する弁。 The valve according to claim 3, wherein the split shaft member provided with the valve body includes a detection body that protrudes outside the valve main body.