JP4231839B2 - Poppet valve with poppet position detector - Google Patents

Poppet valve with poppet position detector Download PDF

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JP4231839B2
JP4231839B2 JP2004367587A JP2004367587A JP4231839B2 JP 4231839 B2 JP4231839 B2 JP 4231839B2 JP 2004367587 A JP2004367587 A JP 2004367587A JP 2004367587 A JP2004367587 A JP 2004367587A JP 4231839 B2 JP4231839 B2 JP 4231839B2
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poppet
hole
needle valve
peripheral surface
inner peripheral
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JP2006170408A (en
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祐二 小倉
善造 浜田
智 浜本
哲朗 三輪
康治 岡崎
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Nachi Fujikoshi Corp
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Description

本発明は産業機械及び建設機械等に使用されるポペット弁（ポペット形方向制御弁）のポペットの位置を直接検出できる検出装置付ポペット弁に関し、特に、ポペットにオーバーラップを設けたポペット位置検出装置付ポペット弁に関する。 The present invention relates to industrial machinery and construction machinery poppet valve used in the detection apparatus with a poppet valve position can be detected directly in the poppet (poppet type directional control valve), in particular, the poppet position detector provided with overlap poppet Related to poppet valve.

ポペット弁は、通常２つの流体通路を有し、この２つの流体通路間をポペットによって連通または遮断して前記流体通路に流入する圧力流体を通過させたり、遮断したりする機能を有する。
従来、この種のポペット弁は、差動トランスを用いてポペットの位置を検出して２つの流体通路間の連通及び遮断の状態を検出している（例えば、特許文献１参照）。
特開平 ６−１７３９０７号公報 The poppet valve usually has two fluid passages, and has a function of passing or shutting off the pressure fluid flowing into the fluid passage by connecting or shutting off the two fluid passages by the poppet.
Conventionally, this type of poppet valve detects the position of the poppet by using a differential transformer to detect the communication and blocking states between two fluid passages ( see, for example, Patent Document 1).
JP-A-6-173907

しかしながら、特許文献１に示すような差動トランスタイプのものは、弁構造が複雑になる。差動トランス及び専用の電気回路（アンプ）が必要になるので高価となる。また、使用前に、差動トランス又は検出体であるコアの位置を調整する必要がある。さらには、差動トランス及び電気回路（アンプ）の温度変化により、検出体の検出位置が変化する（温度ドリフトと呼ばれる現象が発生する）等という問題があった。   However, the differential transformer type as shown in Patent Document 1 has a complicated valve structure. Since a differential transformer and a dedicated electric circuit (amplifier) are required, it becomes expensive. Moreover, before use, it is necessary to adjust the position of the core which is a differential transformer or a detection body. Furthermore, there has been a problem that the detection position of the detection body changes (a phenomenon called temperature drift occurs) due to temperature changes of the differential transformer and the electric circuit (amplifier).

本発明の課題は前述した問題点に鑑みて、高価なセンサ及び電気回路を使用しない。簡単な構造で、耐久性に優れている。使用前段階でのセンサ及び検出体の位置調整が不要。差動トランスタイプとは違い、ＯＮ時とＯＦＦ時の検出位置が同一（ヒステリシスがない）。温度の変化により、検出体の検出位置が変化しない（温度ドリフトがない）等の特徴を有するポペットの位置を直接検出できること特徴とするポペット位置検出装置付ポペット弁を提供すること目的とする。   In view of the above-mentioned problems, the subject of the present invention does not use expensive sensors and electric circuits. Simple structure and excellent durability. It is not necessary to adjust the position of the sensor and the detection body in the pre-use stage. Unlike the differential transformer type, the ON and OFF detection positions are the same (no hysteresis). It is an object of the present invention to provide a poppet valve with a poppet position detection device that can directly detect the position of a poppet having a feature such that the detection position of a detection body does not change due to a change in temperature (no temperature drift).


そこで、請求項１に記載の発明においては、
第１及び第２の流体通路を形成すると共に該第１の流体通路に接続される第１の軸方向穴及び該第１の軸方向穴に同軸に連通し前記第２の流体通路に接続される第２の軸方向向穴及び該第２の軸方向穴に連通する第３の軸方向穴を有する本体と、
円筒部の外周面が前記第１の軸方向穴に嵌着され鍔部が第３の軸方向穴に嵌入されると共に内方に大径内周面及び内周面を有するスリーブ部材と、
前記スリーブ部材の前記大径内周面に大径部が嵌挿され前記スリーブ部材の前記内周面に小径部が嵌挿され軸方向により前記第１及び第２の流体通路を開閉するポペット部材と、
前記ポペット部材を移動または位置決めする手段と、
を備えた制御弁であって、
前記ポペット部材を移動または位置決めする手段は、
前記ポペット部材が軸方向に沿って変位して前記ポペット部材の前記先端部が前記スリーブ部材の前記内周面に嵌挿した際、前記ポペット部材の前記先端部の外周面と前記スリーブ部材の前記内周面との嵌合部に形成されたオーバーラップ部と、
前記ポペット部材が前記スリーブ部材に嵌挿された際、前記スリーブ部材の前記大径内周面と前記ポペット部材の前記大径部及び前記小径部、該小径部と前記スリーブ部材の前記内周面により形成された第１及び第２の流体室と、
前記ポペット部材により区分された前記スリーブ部材の前記大径内周面側及び前記内周面側を連通するため前記スリーブ部材の中央部軸方向に穿設された孔部と、
大径部が電磁プランジャに接続され該大径部と一体になる小径部の先端部に前記スリーブ部材の前記孔部に係合する円錐部が設けられた針弁部材と、
前記針弁部材の前記大径部と前記小径部との接続部分に設けた検出鍔部と、
前記針弁部材と同心に該針弁部材の前記大径部を出入り可能にかつ前記針弁部材とは干渉しないように設けられたリング部材と、
前記リング部材の外方側端面または前記検出鍔部のいずれか一方もしくは同時に当接可能に軸方向に移動可能にされ前記針弁部材と同心に前記検出鍔部を除き前記針弁部材と干渉しないように設けられたリング状の接触部材と、
前記接触部材を前記検出鍔部または前記リング部材へ付勢する第１のスプリングと、
前記針弁部材を付勢して該針弁部材の前記円錐部を前記スリーブ部材の前記孔部に係合させる第２のスプリングと、
前記検出鍔部の端面と前記リング部材の前記外方側壁面との間に設けた間隙部と、
を備え、
前記前記オーバーラップ部の長さは前記間隙部の長さよりも長く形成され、前記接触部材は導電性を有し外部と電気接続可能にされた電気端子とで電気的に導通されており、前記リング部材は前記電気端子とは異なる検出電気端子と電気的に接続され、前記第１のスプリングにより前記リング部材の前記外方側壁面と前記接触部材が当接したときは前記リング部材を介して前記電気端子と前記検出電気端子が導電し、前記針弁部材の前記円錐部が前記ポペット部材の前記孔部に係合して該孔部を閉塞して前記第１及び前記第２の流体通路の遮断を検出し、前記リング部材の前記外方側壁面と前記接触部材が離間しているときは少なくとも前記リング部材と前記電気端子とが導電せず、前記針弁部材の前記円錐部が前記ポペット部材の前記孔部より離脱し該孔部を開口して前記第１及び前記第２の流体通路の連通を検出していることを特徴とする。
本発明によれば、ポペット部材にオーバーラップ部を設けたことにより、一方の流体通路に微少流量の圧力流体が供給されても、流体通路間の連通及び遮断状態を確実に検出できる。
また、オーバーラップ部が前記隙間よりも大きく設けられたので、針弁部材が変位してから接触部材を移動させ、リング部材と接触部材とが非接触になってから流体通路を連通させることができる。
Therefore, in the invention according to claim 1,
A first axial hole that forms first and second fluid passages and is connected to the first fluid passage and is coaxially connected to the first fluid passage and connected to the second fluid passage. A body having a second axial hole and a third axial hole communicating with the second axial hole;
A sleeve member having an outer peripheral surface of the cylindrical portion fitted into the first axial hole and a flange portion fitted into the third axial hole and having a large-diameter inner peripheral surface and an inner peripheral surface inward;
A poppet member having a large-diameter portion inserted into the large-diameter inner peripheral surface of the sleeve member and a small-diameter portion inserted into the inner peripheral surface of the sleeve member to open and close the first and second fluid passages in the axial direction. When,
Means for moving or positioning the poppet member;
A control valve with
The means for moving or positioning the poppet member comprises:
When the poppet member is displaced along the axial direction and the tip portion of the poppet member is fitted and inserted into the inner peripheral surface of the sleeve member, the outer surface of the tip portion of the poppet member and the sleeve member An overlap portion formed at a fitting portion with the inner peripheral surface;
When the poppet member is fitted into the sleeve member, the large-diameter inner peripheral surface of the sleeve member, the large-diameter portion and the small-diameter portion of the poppet member, and the small-diameter portion and the inner peripheral surface of the sleeve member First and second fluid chambers formed by:
A hole formed in the axial direction of the central portion of the sleeve member to communicate the large diameter inner peripheral surface side and the inner peripheral surface side of the sleeve member divided by the poppet member;
A needle valve member in which a conical portion that engages with the hole of the sleeve member is provided at a distal end portion of a small diameter portion that is connected to an electromagnetic plunger and is integrated with the large diameter portion;
A detection collar provided at a connection portion between the large diameter portion and the small diameter portion of the needle valve member;
A ring member provided concentrically with the needle valve member so as to be able to enter and exit the large diameter portion of the needle valve member and not to interfere with the needle valve member;
Either the outer side end surface of the ring member or the detection flange is movable in the axial direction so as to be contactable at the same time, and does not interfere with the needle valve member except for the detection flange, concentrically with the needle valve member. A ring-shaped contact member provided
A first spring that biases the contact member toward the detection collar or the ring member;
A second spring that urges the needle valve member to engage the conical portion of the needle valve member with the hole of the sleeve member;
A gap provided between an end surface of the detection flange and the outer side wall surface of the ring member;
With
The length of the overlap portion is formed longer than the length of the gap portion, and the contact member is electrically connected to an electrical terminal having electrical conductivity and being electrically connectable to the outside, The ring member is electrically connected to a detection electric terminal different from the electric terminal, and when the outer side wall surface of the ring member abuts on the contact member by the first spring, the ring member is interposed through the ring member. The electrical terminal and the detection electrical terminal are electrically conductive, and the conical portion of the needle valve member engages with the hole portion of the poppet member to close the hole portion, thereby the first and second fluid passages. When the outer side wall surface of the ring member and the contact member are separated from each other, at least the ring member and the electrical terminal are not electrically conductive, and the conical portion of the needle valve member is The hole of the poppet member Departed open the pores unit characterized in that it detects the communication of the first and the second fluid passage Ri.
According to the present invention, since the poppet member is provided with the overlap portion, it is possible to reliably detect the communication state and the shut-off state between the fluid passages even if a small amount of pressure fluid is supplied to one fluid passage.
Further, since the overlap portion is provided larger than the gap, the contact member is moved after the needle valve member is displaced, and the fluid passage is communicated after the ring member and the contact member are not in contact with each other. it can.

本発明においては ポペット部材にオーバーラップ部を設けたことにより、一方の流体
通路に微少流量の圧力流体が供給されても、流体通路間の連通及び遮断状態を確実に検出できる。
また、オーバーラップ部が前記隙間よりも大きく設けられたので、針弁部材が変位してから接触部材を移動させ、リング部材と接触部材とか非接触になってから流体通路を連通させることができる。 In the present invention, since the poppet member is provided with the overlap portion, even if a small amount of pressure fluid is supplied to one of the fluid passages, it is possible to reliably detect the communication state and the shut-off state between the fluid passages.
In addition, since the overlap portion is provided larger than the gap, the contact member is moved after the needle valve member is displaced, and the fluid passage can be communicated after the ring member and the contact member are not in contact with each other. .

本発明の実施の形態について図面を参照して説明する。図１は、本発明の実施の形態を示すポペット位置検出装置付ポペット弁１０の要部縦断面図である。
図１に示すように、ポペット位置検出装置付ポペット弁１０の本体１１には複数の流体通路、例えば流体通路（第１の流体通路）１２、(第２の流体通路)１３が形成されると共に、前記流体通路１２に接続する軸方向穴（第１の軸方向穴）１４と、該軸方向穴１４に同軸に連通し前記流体通路１３に接続する軸方向穴（第２の軸方向穴）１５と、前記軸方向穴１５に同軸に連通する軸方向穴（第３の軸方向穴）１６とを、備える。
軸方向穴１４、１６にはスリーブ（スリーブ部材）１７が嵌挿されている。前記スリーブ１７は一端部に形成された鍔１７ａが軸方向穴１６の端面に係合され、かつ円筒部１７ｂの外周面が軸方向穴１４に嵌挿されている。スリーブ１７の大径内周面にはポペット（ポペット部材）１８の大径部１８ａが摺動自在に嵌挿され、かつ小径部１８ｂの先端部がオーバーラップ部２３（図３参照）を有してスリーブ１７の円筒部１７ｂの内周面１７ｃに嵌挿される。 Embodiments of the present invention will be described with reference to the drawings. Figure 1 is a longitudinal sectional view of main parts of a poppet position detector with port pets preparative valve 10 showing an embodiment of the present invention.
As shown in FIG. 1, a plurality of fluid passages, for example, a fluid passage (first fluid passage) 12 and a (second fluid passage) 13 are formed in a main body 11 of a poppet valve 10 with a poppet position detection device. , an axial bore (first axial hole) 14 connected to the fluid passage 12, the axial bore to be connected to the fluid passage 13 communicates coaxially to the axis direction hole 14 (the second axial hole) 15 and an axial hole (third axial hole) 16 communicating coaxially with the axial hole 15.
A sleeve (sleeve member) 17 is fitted into the axial holes 14 and 16. The sleeve 17 has a flange 17 a formed at one end thereof engaged with an end surface of the axial hole 16, and an outer peripheral surface of the cylindrical portion 17 b is inserted into the axial hole 14. A large-diameter portion 18a of a poppet (poppet member) 18 is slidably fitted on the large-diameter inner peripheral surface of the sleeve 17, and a distal end portion of the small-diameter portion 18b has an overlap portion 23 (see FIG. 3). The sleeve 17 is inserted into the inner peripheral surface 17c of the cylindrical portion 17b.

前記小径部１８ｂの中央部には軸方向に孔（孔部）１９、２０が穿設されると共に、前記孔１９にねじ部材２１によりボール２２が装填されている。なお、ねじ部材２１の中央部には孔２１ａ（図３参照）が形成され孔２０と連通している。軸状部材である針弁（針弁部材）２４は一端に孔２０に係合する円錐部２４ａを有する小径部２５と、該小径部２５に続いて形成された鍔（検出鍔部）２６と、前記鍔２６に続いて形成され前記小径部２５よりも径大の大径部２７と、を備える。前記鍔２６は、接触子４７が針弁２４と一体に移動できるように機能する。
前記小径部２５はスリーブ１７の鍔１７ａ及び大径内周面に嵌挿したブッシュ２８に摺動可能に支持され、かつ大径部２７はソレノイドガイド２９内を摺動可能な可動鉄心であるプランジャ３０とピン３１によって連結されている。
前記針弁２４は電磁コイル３２の構成部材であるスプリング３３の力−スプリング４８の力の弾発力によりポペット１８に押し付けられ、孔２０を閉塞するように機能する。なお、ソレノイドガイド２９は端部（図１で右端部）が軸方向穴１６に嵌挿されたねじ手段３４により本体１１に螺着され、該ねじ手段３４の反対側は図示しない雄ねじにナット３５により螺着されている。この場合、ソレノイドガイド２９の端部（図１で右端部）には
スリーブ１７の大径内周面に挿入されたブッシュ２８及び軸方向穴１６に嵌着された円筒状のスペーサ３６を介して本体１１に螺着されているので、ソレノイドガイド２９がねじ手段３４により本体１１に螺着された際、所定位置に保持される。ここで、ブッシュ２８の大径部は軸方向穴１６に装着されると共に該大径部の側壁面はスペーサ３６の側壁面に接触している。なお、参照符号３７はコネクタを示すもので、電磁コイル３２のコイル端子（図示しない）と外部電源とを接続する機能を有する。 Holes (holes) 19 and 20 are formed in the central portion of the small diameter portion 18b in the axial direction, and balls 22 are loaded into the holes 19 by screw members 21. A hole 21 a (see FIG. 3) is formed at the center of the screw member 21 and communicates with the hole 20. A needle valve (needle valve member) 24, which is a shaft-like member, has a small diameter portion 25 having a conical portion 24 a that engages with the hole 20 at one end, and a flange ( detection flange portion) 26 formed following the small diameter portion 25. And a large-diameter portion 27 formed subsequent to the flange 26 and having a larger diameter than the small-diameter portion 25. The collar 26 functions so that the contact 47 can move integrally with the needle valve 24.
The small-diameter portion 25 is slidably supported by a flange 17a of the sleeve 17 and a bush 28 fitted into the large-diameter inner peripheral surface, and the large-diameter portion 27 is a plunger that is a movable iron core that can slide in the solenoid guide 29. 30 and a pin 31.
The needle valve 24 is pressed against the poppet 18 by the resilience of the force of the spring 33 which is a constituent member of the electromagnetic coil 32 and the force of the spring 48 and functions to close the hole 20. Incidentally, the solenoid guide 29 end (right end in FIG. 1) is screwed to the body 11 by screw means 34 inserted in the axial hole 16, a nut 35 on the opposite side (not shown) external thread of said screw means 34 It is screwed by. In this case, the end of the solenoid guide 29 (the right end in FIG. 1)
Since the bushing 28 inserted in the large-diameter inner peripheral surface of the sleeve 17 and the cylindrical spacer 36 fitted in the axial hole 16 are screwed to the main body 11, the solenoid guide 29 is screwed by the screw means 34. When screwed into the main body 11, it is held in a predetermined position. Here, the large diameter portion of the bush 28 is attached to the axial hole 16, and the side wall surface of the large diameter portion is in contact with the side wall surface of the spacer 36. Reference numeral 37 denotes a connector, and has a function of connecting a coil terminal (not shown) of the electromagnetic coil 32 and an external power source.

前記スペーサ３６の内径面には第１のスペーサ３９、リング４０が嵌挿され、ソレノイドガイド２９の端部に形成された貫通穴３８には内方より外方に導電体である波形ワッシャ４１、リテーナ４２及び第２のスペーサ４３が嵌挿される。これにより前記リング４０は第１、第２のスペーサ３９、４３、波形ワッシャ４１及びリテーナ４２により固定されている。
前記第１のスペーサ３９はその側面（図１で右側面）には凹形状のインロー部４４が形成されている。リング４０の両端面には、第１のスペーサ３９の凹形状のインロー部４４及び第２のスペーサ４３の内径に嵌挿される凸状部４５、４６が形成されている。 A first spacer 39 and a ring 40 are fitted on the inner diameter surface of the spacer 36, and a corrugated washer 41, which is a conductor outward from the inside, is inserted into a through hole 38 formed at the end of the solenoid guide 29, The retainer 42 and the second spacer 43 are inserted. As a result, the ring 40 is fixed by the first and second spacers 39 and 43, the corrugated washer 41 and the retainer 42.
The first spacer 39 has a recessed spigot 44 formed on its side surface (right side surface in FIG. 1) . On both end surfaces of the ring 40, concave inlay portions 44 of the first spacer 39 and convex portions 45 and 46 that are fitted into the inner diameter of the second spacer 43 are formed.

これにより、リング４０は第１、第２のスペーサ３９、４３により軸方向及び軸直角方向に沿って挟持され、本体１１とリング４０との接触を防止している。第１、第２のスペーサ３９、４３は本体１１とリング４０とが電気的に導通しないように電気絶縁材により形成されている。電気絶縁材は機械的強度、耐熱性、絶縁性、耐油性等からガラス繊維強化ポリアミド６６樹脂としている。従って、リング４０は第１、第２のスペーサ３９、４３を介して本体１１とは電気的に絶縁されている。
この場合、第１のスペーサ３９、リング４０及び第２のスペーサ４３の中空穴径は軸方向に変位する針弁２４と干渉しない大きさに形成されている。また、第２のスペーサ４３は筒状であって、接触子４７及びスプリング（第１のスプリング）４８に干渉しないように形成されている。 As a result, the ring 40 is sandwiched between the first and second spacers 39 and 43 along the axial direction and the direction perpendicular to the axis, thereby preventing the main body 11 from contacting the ring 40. The first and second spacers 39 and 43 are formed of an electrical insulating material so that the main body 11 and the ring 40 are not electrically connected. The electrical insulating material is glass fiber reinforced polyamide 66 resin because of its mechanical strength, heat resistance, insulation, oil resistance and the like. Thus, the ring 40 is electrically insulated from the main body 11 through the first, second spacer 39,4 3.
In this case, the diameters of the hollow holes of the first spacer 39, the ring 40, and the second spacer 43 are formed so as not to interfere with the needle valve 24 that is displaced in the axial direction. The second spacer 43 has a cylindrical shape and is formed so as not to interfere with the contact 47 and the spring (first spring) 48.

前記接触子４７は導電体であり、針弁２４の大径部２７に巻装された導電体であるスプリング４８によってリング４０に押し付けられている。よって、前記接触子４７はスプリング４８、プランジャ３０、スプリング（第２のスプリング）３３、スペーサ７７及びソレノイドガイド２９を介して本体１１に常に導通している。
さらに、流体通路１２、１３間が遮断されている場合、リング４０と接触子４７とが確実に接触している状態に形成するため、各構成部品の加工寸法のばらつきを考慮して、リング４０の外方側端面（リング４０の側面と接触子４７の側面との接触面）と針弁２４に設けた鍔２６の端面４９との間に隙間（間隙部）５０が設けられている。なお、本体１１には外部との電気接続が可能なコネクタ５１が取り付けられ、該コネクタ５１には端子が設けられ電気的に絶縁された検出電気端子５３と、本体１１に電気的に接続（アース）された電気端子５２を、備える。 The contact 47 is a conductor, and is pressed against the ring 40 by a spring 48 that is a conductor wound around the large diameter portion 27 of the needle valve 24. Therefore, the contact 47 is always connected to the main body 11 via the spring 48, the plunger 30, the spring (second spring) 33, the spacer 77 and the solenoid guide 29.
Further, when the fluid passages 12 and 13 are blocked, the ring 40 and the contact 47 are formed so as to be in reliable contact with each other. A gap (gap part) 50 is provided between the outer end face (the contact face between the side face of the ring 40 and the side face of the contactor 47) and the end face 49 of the flange 26 provided on the needle valve 24. Incidentally, the connector 51 capable of electric connection to the outside is attached to the main body 11, a detecting electrical terminal 5 3 terminal is electrically insulated provided in the connector 51, electrically connected to the main body 11 ( earth) has been the electrical terminal 5 2, provided.

本体１１の上部に設けられたコネクタ５１の下側位置には、軸方向穴１６の略軸直角方向に段付状の連通路５４が穿設され、該連通路５４は小径の穴５５と、該穴５５と同軸状に設けられ穴５５の内径より大きい穴５６と、前記穴５６の内径よりも大きい穴５７と、を備える。この場合、前記連通路５４の軸方向中心は軸方向穴１６に設けられたリング４０の幅方向の中心線と略一致するように設けられている。
また、リング４０に設けられためねじ５８の回転方向位置は、連通路５４の上方から見て該連通路５４の中心線上に設けられているので、導電性ロッド６６を連通路５４に嵌挿してめねじ５８に螺着する際に容易に行うことができる。穴５６、５７には段付きのブッシュ５９が挿入され、該ブッシュ５９の段付部６０にＯリング６１が装着されている。
さらに、ブッシュ５９には通し穴６２が形成され、該通し穴６２内にシール部材であるＯリング６３が装着され、該Ｏリング６３を止めるためのシールプレート６４が穴５６に設けられ、ブッシュ５９、シールプレート６４は共に電気絶縁材であるガラス繊維強化ポリアミド６６樹脂により形成されている。穴５５に嵌挿される円筒状のカラー６５はスペーサ３６の外周面に嵌入され、ソレノイドガイド２９締付け時にスペーサ３６が回転しない役割りをしている。 A stepped communication path 54 is drilled in a direction substantially perpendicular to the axial hole 16 at a lower position of the connector 51 provided in the upper portion of the main body 11, and the communication path 54 includes a small-diameter hole 55, the hole comprises 55 greater hole 56 than the inner diameter of the hole 55 is provided coaxially, and a larger hole 57 than the inner diameter of the hole 56. In this case, the axial center of the communication passage 54 is provided so as to substantially coincide with the center line in the width direction of the ring 40 provided in the axial hole 16.
Since the screw 58 is provided on the ring 40 and the rotational direction position of the screw 58 is provided on the center line of the communication path 54 as viewed from above the communication path 54, the conductive rod 66 is inserted into the communication path 54. This can be easily performed when screwed onto the female screw 58. A stepped bush 59 is inserted into the holes 56 and 57, and an O-ring 61 is attached to the stepped portion 60 of the bush 59.
Further, a through hole 62 is formed in the bush 59, an O-ring 63 as a seal member is mounted in the through-hole 62, a seal plate 64 for stopping the O-ring 63 is provided in the hole 56, and the bush 59 Both of the seal plates 64 are made of glass fiber reinforced polyamide 66 resin, which is an electrical insulating material. A cylindrical collar 65 that is inserted into the hole 55 is inserted into the outer peripheral surface of the spacer 36 and serves to prevent the spacer 36 from rotating when the solenoid guide 29 is tightened.

前記導電性ロッド６６は通し穴６２及びＯリング６３の穴を貫通し、該導電性ロッド６６の外周が通し穴６２のＯリング６３でシールされている。さらに、導電性ロッド６６の一端はリング４０の外周面に設けられためねじ５８に電気的に導通状態で螺着されており、該導電性ロッド６６の他端は検出電気端子５３とリード線６７を介して接続されている。
これにより、リング４０と導電性ロッド６６と検出電気端子５３とが、電気的に常時接続される一方、本体１１、ソレノイドガイド２９等とは絶縁されている。 The conductive rod 66 passes through the through hole 62 and the hole of the O-ring 63, and the outer periphery of the conductive rod 66 is sealed with the O-ring 63 of the through hole 62. One end of the conductive rod 66 is screwed in an electrically conductive state in the internal thread 58 provided on the outer peripheral surface of the ring 40, the other end of the conductive rod 66 is detected electrical terminals 5 3 and the lead wire 67 is connected.
Accordingly, the electric detection terminal 5 3 ring 40 and the conductive rod 66 while being electrically continuous connection, the body 11 is insulated from the solenoid guide 29 and the like.

本発明の実施の形態に係るポペット位置検出装置付ポペット弁１０は基本的には以上のように構成されており、次に動作について説明する。
先ず、電磁コイル３２が非励磁の状態で流体通路１３から圧力流体を供給した場合、ポペット１８には孔７６を設けているので流体室７１及び７２の圧力は同一に保持されているが、ポペット１８の両端面の受圧面積差により流体室７１側の受圧面積７５は流体室７２側の受圧面積７４より大きいため、ポペット１８は矢印Ｙ方向に変位し針弁２４の円錐部２４ａが孔２０に当接して流体通路１２及び１３間を遮断する（図１参照）。 The poppet valve with poppet position detection device 10 according to the embodiment of the present invention is basically configured as described above. Next, the operation will be described.
First, when pressure fluid is supplied from the fluid passage 13 in a state where the electromagnetic coil 32 is not excited, the poppet 18 is provided with the hole 76, so that the pressure in the fluid chambers 71 and 72 is kept the same. Since the pressure receiving area 75 on the fluid chamber 71 side is larger than the pressure receiving area 74 on the fluid chamber 72 side due to the pressure receiving area difference between the both end faces of 18, the poppet 18 is displaced in the arrow Y direction and the conical portion 24 a of the needle valve 24 is formed in the hole 20. The fluid passages 12 and 13 are blocked by contact (see FIG. 1).

さらに、リング４０と接触子４７とは接触しているので、電気端子５２は検出電気端子５３と導通しており、この電気端子５２と検出電気端子５３との導通状態を検出することにより針弁２４の位置検出を確認して流体通路１２及び１３間の連通及び遮断状態を遠隔的に確認することができる。 Further, since the contact with the ring 40 and the contactor 47, the electric terminal 5 2 is conducting the output electrical terminal 5 3 test, a conduction state between the output electrical terminal 53 test with the electrical terminal 52 By detecting the position of the needle valve 24, the communication between the fluid passages 12 and 13 and the blocking state can be confirmed remotely.

この状態で、電磁コイル３２を励磁すると、図２に示すようにプランジャ３０が矢印Ｘ方向に変位し、それに伴い針弁２４も協動する。針弁２４が矢印Ｘ方向に変位すると、該針弁２４によって閉塞されていた孔２０が開き、流体室７１の圧力流体が該孔２０を通って流体通路１２へ流れる。圧力流体が流体室７１から流体通路１２に流れると、該流体室７１の圧力は流体室７２の圧力よりも低くなる。
流体室７１の圧力が低くなり、（流体室７２の圧力×受圧面積７４）の力が（流体室７１の圧力×受圧面積７５）の力よりも大きくなるので、ポペット１８は矢印Ｘ方向に変位する。よって、流体通路１２及び１３が流体室７２を介して連通状態になり圧力流体は流体通路１３から流体通路１２に流れるようになる。 When the electromagnetic coil 32 is excited in this state, the plunger 30 is displaced in the direction of the arrow X as shown in FIG. 2, and the needle valve 24 cooperates accordingly. When the needle valve 24 is displaced in the direction of arrow X, the hole 20 closed by the needle valve 24 is opened, and the pressure fluid in the fluid chamber 71 flows to the fluid passage 12 through the hole 20. When the pressure fluid flows from the fluid chamber 71 to the fluid passage 12, the pressure of the fluid chamber 71 becomes lower than the pressure of the fluid chamber 72.
Since the pressure of the fluid chamber 71 becomes lower and the force of (the pressure of the fluid chamber 72 × the pressure receiving area 74) becomes larger than the force of (the pressure of the fluid chamber 71 × the pressure receiving area 75), the poppet 18 is displaced in the arrow X direction. To do. Therefore, the fluid passages 12 and 13 are in communication with each other via the fluid chamber 72 , and the pressure fluid flows from the fluid passage 13 to the fluid passage 12.

次に、流体通路１２から圧力流体を供給し、電磁コイル３２が非励磁の状態の場合、流体通路１２の圧力に受圧面積（第３の受圧面積）７３を積算した力がスプリング３３のスプリング力−スプリング４８の力の弾発力よりも大きければ、圧力流体はポペット１８を押し開いて流体通路１３に流れる。
このとき、図３に示すように、リング４０の外方側端面（リング４０の側面と接触子４７の側面との接触面）と針弁２４に設けた鍔２６の端面４９との間の隙間（間隙部）５０と、スリーブ１７の円筒部１７ｂの内周面１７ｃに嵌合するようにポペット１８の小径部１８ｂに設けたオーバーラップ部２３との寸法関係は、常にオーバーラップ部２３が隙間５０よりも大きく設定されているので、針弁２４が矢印Ｘ方向に変位して接触子４７を移動させ、リング４０と接触子４７とが非接触状態になってから流体通路１２と流体通路１３とが連通する。この場合、リング４０と接触子４７とが非接触状態になると、検出電気端子５３と電気端子５２との導通も解除される。 Next, when pressure fluid is supplied from the fluid passage 12 and the electromagnetic coil 32 is in a non-excited state, the force obtained by integrating the pressure receiving area (third pressure receiving area) 73 to the pressure of the fluid passage 12 is the spring force of the spring 33. The pressure fluid pushes the poppet 18 open and flows into the fluid passage 13 if it is greater than the spring force of the spring 48;
At this time, as shown in FIG. 3, the gap between the outer side end surface of the ring 40 (the contact surface between the side surface of the ring 40 and the side surface of the contactor 47) and the end surface 49 of the flange 26 provided on the needle valve 24. (Gap part) 50 and the dimensional relationship between the overlap part 23 provided on the small diameter part 18b of the poppet 18 so as to be fitted to the inner peripheral surface 17c of the cylindrical part 17b of the sleeve 17, the overlap part 23 is always a gap. because it is larger than 50, the needle valve 24 is displaced in the direction of arrow X to move the contactor 47, the ring 40 and the contact 47 and the fluid passage 12 becomes a non-contact state fluid passage 13 And communicate. In this case, the ring 40 and the contact 47 becomes a non-contact state, conduction between the detection electrical terminals 5 3 and the electric terminal 5 2 is also released.

流体通路１２から圧力流体を供給し、かつ電磁コイル３２を励磁した場合、プランジャ３０が矢印Ｘ方向に変位するのでポペット１８にはスプリング３３の弾発力が付勢されない。
よって、ポペット１８を押し開く力は該ポペット１８の摺動抵抗のみになるので、圧力流体は自由に流体通路１２から流体通路１３に流れる。
この状態で、電磁コイル３２を励磁して針弁２４により閉塞していた孔２０が開くと、圧力流体が流体通路１２から孔２１ａ，孔２０を通って流体室７１に流入するのを、ボール２２によって防止している。このため、ポペット１８が矢印Ｘ方向に変位して孔２０が閉塞される。ここで、針弁２４が矢印Ｘ方向に変位すると、鍔２６によって接触子４７も協動するので、リング４０と接触子４７との接触なくなり電気端子５２と検出電気端子５３との導通状態も解除される。
この実施の形態においては、針弁２４の位置によって電気端子５２と検出電気端子５３との導通状態が変化しこの導通状態を電気的に検出すれば、針弁２４の位置検出を行うことができる。この結果、流体通路１２及び流体通路１３間の連通及び遮断状態を確認することが可能である。 When pressure fluid is supplied from the fluid passage 12 and the electromagnetic coil 32 is excited, the plunger 30 is displaced in the direction of the arrow X, so that the poppet 18 is not biased by the spring 33.
Therefore, since the force that pushes the poppet 18 becomes only the sliding resistance of the poppet 18, the pressure fluid freely flows from the fluid passage 12 to the fluid passage 13.
In this state, when the hole 20 closed by the needle valve 24 is opened by exciting the electromagnetic coil 32, the pressure fluid flows from the fluid passage 12 through the holes 21a and 20 into the fluid chamber 71. 22 prevents it. For this reason, the poppet 18 is displaced in the arrow X direction, and the hole 20 is closed. Here, when the needle valve 24 is displaced in the direction of arrow X, conductive state with so cooperates also contacts 47 by the collar 26, the ring 40 and the contact eliminates electrical terminals 5 2 and the detection electrical terminals 5 3 and the contactor 47 Is also released.
In this embodiment, if electrically detecting the conductive state conduction state is changed to the electrical terminals 5 2 and the detection electrical terminal 5 3 by the position of the needle valve 24, to detect the position of the needle valve 24 Can do. As a result, it is possible to confirm the communication and blocking state between the fluid passage 12 and the fluid passage 13.

本発明の実施の形態に係るポペット位置検出装置付ポペット弁の要部断面図である。It is principal part sectional drawing of the poppet valve with a poppet position detection apparatus which concerns on embodiment of this invention. 本発明の実施の形態に係るポペット位置検出装置付ポペット弁の動作説明図である。It is operation | movement explanatory drawing of the poppet valve with a poppet position detection apparatus which concerns on embodiment of this invention. 図１のポペット近傍の要部拡大断面図である。It is a principal part expanded sectional view of the poppet vicinity of FIG.

符号の説明Explanation of symbols

１０ ポペット位置検出装置付ポペット弁 １１ 本体
１２、１３ 流体通路 １４〜１６ 軸方向穴
１７ スリーブ １８ ポペット
２２ ボール ２４ 針弁
２８ ブッシュ ２９ ソレノイド
３０ プランジャ ３２ 電磁コイル


10 Poppet valve with poppet position detector 11 Body
12, 13 Fluid passage 14-16 Axial hole 17 Sleeve 18 Poppet 22 Ball 24 Needle valve 28 Bush 29 Solenoid 30 Plunger 32 Electromagnetic coil


Claims (1)

第１及び第２の流体通路を形成すると共に該第１の流体通路に接続される第１の軸方向穴及び該第１の軸方向穴に同軸に連通し前記第２の流体通路に接続される第２の軸方向向穴及び該第２の軸方向穴に連通する第３の軸方向穴を有する本体と、
円筒部の外周面が前記第１の軸方向穴に嵌着され鍔部が第３の軸方向穴に嵌入されると共に内方に大径内周面及び内周面を有するスリーブ部材と、
前記スリーブ部材の前記大径内周面に大径部が嵌挿され前記スリーブ部材の前記内周面に小径部が嵌挿され軸方向により前記第１及び第２の流体通路を開閉するポペット部材と、
前記ポペット部材を移動または位置決めする手段と、
を備えた制御弁であって、
前記ポペット部材を移動または位置決めする手段は、
前記ポペット部材が軸方向に沿って変位して前記ポペット部材の前記先端部が前記スリーブ部材の前記内周面に嵌挿した際、前記ポペット部材の前記先端部の外周面と前記スリーブ部材の前記内周面との嵌合部に形成されたオーバーラップ部と、
前記ポペット部材が前記スリーブ部材に嵌挿された際、前記スリーブ部材の前記大径内周面と前記ポペット部材の前記大径部及び前記小径部、該小径部と前記スリーブ部材の前記内周面により形成された第１及び第２の流体室と、
前記ポペット部材により区分された前記スリーブ部材の前記大径内周面側及び前記内周面側を連通するため前記スリーブ部材の中央部軸方向に穿設された孔部と、
大径部が電磁プランジャに接続され該大径部と一体になる小径部の先端部に前記スリーブ部材の前記孔部に係合する円錐部が設けられた針弁部材と、
前記針弁部材の前記大径部と前記小径部との接続部分に設けた検出鍔部と、
前記針弁部材と同心に該針弁部材の前記大径部を出入り可能にかつ前記針弁部材とは干渉しないように設けられたリング部材と、
前記リング部材の外方側端面または前記検出鍔部のいずれか一方もしくは同時に当接可能に軸方向に移動可能にされ前記針弁部材と同心に前記検出鍔部を除き前記針弁部材と干渉しないように設けられたリング状の接触部材と、
前記接触部材を前記検出鍔部または前記リング部材へ付勢する第１のスプリングと、
前記針弁部材を付勢して該針弁部材の前記円錐部を前記スリーブ部材の前記孔部に係合させる第２のスプリングと、
前記検出鍔部の端面と前記リング部材の前記外方側壁面との間に設けた間隙部と、
を備え、
前記前記オーバーラップ部の長さは前記間隙部の長さよりも長く形成され、前記接触部材は導電性を有し外部と電気接続可能にされた電気端子とで電気的に導通されており、前記リング部材は前記電気端子とは異なる検出電気端子と電気的に接続され、前記第１のスプリングにより前記リング部材の前記外方側壁面と前記接触部材が当接したときは前記リング部材を介して前記電気端子と前記検出電気端子が導電し、前記針弁部材の前記円錐部が前記ポペット部材の前記孔部に係合して該孔部を閉塞して前記第１及び前記第２の流体通路の遮断を検出し、前記リング部材の前記外方側壁面と前記接触部材が離間しているときは少なくとも前記リング部材と前記電気端子とが導電せず、前記針弁部材の前記円錐部が前記ポペット部材の前記孔部より離脱し該孔部を開口して前記第１及び前記第２の流体通路の連通を検出していることを特徴とする制御部材位置検出装置付制御弁。 A first axial hole that forms first and second fluid passages and is connected to the first fluid passage and is coaxially connected to the first fluid passage and connected to the second fluid passage. A body having a second axial hole and a third axial hole communicating with the second axial hole;
A sleeve member having an outer peripheral surface of the cylindrical portion fitted into the first axial hole and a flange portion fitted into the third axial hole and having a large-diameter inner peripheral surface and an inner peripheral surface inward;
A poppet member having a large-diameter portion inserted into the large-diameter inner peripheral surface of the sleeve member and a small-diameter portion inserted into the inner peripheral surface of the sleeve member to open and close the first and second fluid passages in the axial direction. When,
Means for moving or positioning the poppet member;
A control valve with
The means for moving or positioning the poppet member comprises:
When the poppet member is displaced along the axial direction and the tip portion of the poppet member is fitted and inserted into the inner peripheral surface of the sleeve member, the outer surface of the tip portion of the poppet member and the sleeve member An overlap portion formed at a fitting portion with the inner peripheral surface;
When the poppet member is fitted into the sleeve member, the large-diameter inner peripheral surface of the sleeve member, the large-diameter portion and the small-diameter portion of the poppet member, and the small-diameter portion and the inner peripheral surface of the sleeve member First and second fluid chambers formed by:
A hole formed in the axial direction of the central portion of the sleeve member to communicate the large diameter inner peripheral surface side and the inner peripheral surface side of the sleeve member divided by the poppet member;
A needle valve member in which a conical portion that engages with the hole of the sleeve member is provided at a distal end portion of a small diameter portion that is connected to an electromagnetic plunger and is integrated with the large diameter portion;
A detection collar provided at a connection portion between the large diameter portion and the small diameter portion of the needle valve member;
A ring member provided concentrically with the needle valve member so as to be able to enter and exit the large diameter portion of the needle valve member and not to interfere with the needle valve member;
Either the outer side end surface of the ring member or the detection flange is movable in the axial direction so as to be contactable at the same time, and does not interfere with the needle valve member except for the detection flange, concentrically with the needle valve member. A ring-shaped contact member provided
A first spring that biases the contact member toward the detection collar or the ring member;
A second spring that urges the needle valve member to engage the conical portion of the needle valve member with the hole of the sleeve member;
A gap provided between an end surface of the detection flange and the outer side wall surface of the ring member;
With
The length of the overlap portion is formed longer than the length of the gap portion, and the contact member is electrically connected to an electrical terminal having electrical conductivity and being electrically connectable to the outside, The ring member is electrically connected to a detection electric terminal different from the electric terminal, and when the outer side wall surface of the ring member abuts on the contact member by the first spring, the ring member is interposed through the ring member. The electrical terminal and the detection electrical terminal are electrically conductive, and the conical portion of the needle valve member engages with the hole portion of the poppet member to close the hole portion, thereby the first and second fluid passages. When the outer side wall surface of the ring member and the contact member are separated from each other, at least the ring member and the electrical terminal are not electrically conductive, and the conical portion of the needle valve member is The hole of the poppet member Ri withdrawal control member position detecting device with a control valve, characterized in that detects the communication of the first and second fluid passages open to the hole portion.
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JPH0246178U (en) * 1988-09-26 1990-03-29
JPH04210180A (en) * 1990-12-06 1992-07-31 Kayaba Ind Co Ltd Flow control valve
JP3034671B2 (en) * 1991-05-28 2000-04-17 株式会社不二越 Electromagnetic proportional control valve
JPH05126276A (en) * 1991-10-31 1993-05-21 Advanced Saakitsuto Technol:Kk Method and circuit for deciding solenoid valve opening/ closing
JPH06213369A (en) * 1992-11-06 1994-08-02 Nabco Ltd Switching position sensing device of multi-gang direction selector valve
JP3485992B2 (en) * 1995-02-16 2004-01-13 日立建機株式会社 Spool valve device
US5942892A (en) * 1997-10-06 1999-08-24 Husco International, Inc. Method and apparatus for sensing armature position in direct current solenoid actuators
JP3468454B2 (en) * 1999-07-12 2003-11-17 Ｓｍｃ株式会社 Switching valve with position detection function
JP2002181221A (en) * 2000-12-11 2002-06-26 Smc Corp Flow control valve
JP4420319B2 (en) * 2003-12-22 2010-02-24 株式会社不二越 Spool valve with position detector
JP4467057B2 (en) * 2003-12-22 2010-05-26 株式会社不二越 Spool valve with spool position detector
JP2006170410A (en) * 2004-12-20 2006-06-29 Nachi Fujikoshi Corp Shock prevention mechanism and pilot check valve with operation detection function

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