JP2011043196A - Flow control valve - Google Patents

Flow control valve Download PDF

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Publication number
JP2011043196A
JP2011043196A JP2009190998A JP2009190998A JP2011043196A JP 2011043196 A JP2011043196 A JP 2011043196A JP 2009190998 A JP2009190998 A JP 2009190998A JP 2009190998 A JP2009190998 A JP 2009190998A JP 2011043196 A JP2011043196 A JP 2011043196A
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Prior art keywords
needle valve
valve housing
valve body
housing
operation member
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JP2009190998A
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Japanese (ja)
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JP5350941B2 (en
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Yoshihisa Taki
芳久 瀧
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CKD Corp
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CKD Corp
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Priority to JP2009190998A priority Critical patent/JP5350941B2/en
Priority to CN201010257300.XA priority patent/CN101994871B/en
Priority to DE102010034304.8A priority patent/DE102010034304B4/en
Priority to KR20100079667A priority patent/KR101510360B1/en
Publication of JP2011043196A publication Critical patent/JP2011043196A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F16K1/38—Valve members of conical shape
    • F16K1/385—Valve members of conical shape contacting in the closed position, over a substantial axial length, a seat surface having the same inclination
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/02—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with screw-spindle
    • F16K1/04—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with screw-spindle with a cut-off member rigid with the spindle, e.g. main valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0008—Mechanical means
    • F16K37/0016—Mechanical means having a graduated scale

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)
  • Lift Valve (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Preventing Unauthorised Actuation Of Valves (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flow control valve simplifying structure for numerically indicating the degree of opening of a flow passage, and structure for moving a needle valve element. <P>SOLUTION: In the flow control valve, a screw hole 13d is formed on a valve housing 12 of a speed controller 11, and a screw part 17b of the needle valve element 17 is threaded in the screw hole 13d. On the valve housing 12, an operation member 21 is rotatably provided to integrally rotate with the needle valve element 17. The operation member 21 has a holding part 22 to integrally rotatably hold a shaft part 17c of the needle valve element 17, and a tooth part 23b is formed on an outside surface of the holding part 22 to integrally rotate with the operation member 21. On the valve housing 12, a gear 25 meshed and connected with the tooth part 23a is rotatably supported, and a display ring 26 meshed and connected with the gear 25 is rotatably supported. A first scale which indicates the rotation number of the needle valve element 17 is printed on an outer circumferential surface of the display ring 26. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、ニードル弁体をバルブハウジングの軸方向へ移動させることにより、バルブハウジングに形成された流路の開度を調節して、該流路の流量を調節する流量制御弁に関する。   The present invention relates to a flow rate control valve that adjusts the flow rate of a flow path by adjusting the opening of a flow path formed in the valve housing by moving a needle valve body in the axial direction of the valve housing.

この種の流量制御弁としては、例えば、特許文献１のニードル弁が挙げられる。このニードル弁は、バルブケースに固定的に組み込まれたシート部材と、このシート部材に組み込まれるとともに、シート部材に対して軸方向に移動可能でかつ回転を阻止されたニードル弁体と、このニードル弁体と同軸上においてバルブケースに組み込まれたねじパイプと、このねじパイプを回転させるためのつまみとを備えている。そして、ニードル弁体とねじパイプとを螺合し、つまみを回転させることによって、ニードル弁体を回転を阻止しつつ軸方向に移動させ、ニードル弁体による制御孔（流路）の開度が制御される結果、流量が調節されるようになっている。   As this type of flow control valve, for example, the needle valve of Patent Document 1 is cited. The needle valve includes a seat member fixedly incorporated in the valve case, a needle valve body that is incorporated in the seat member, is movable in the axial direction with respect to the seat member, and is prevented from rotating, and the needle A screw pipe incorporated in the valve case coaxially with the valve body and a knob for rotating the screw pipe are provided. Then, the needle valve body and the screw pipe are screwed together and the knob is rotated to move the needle valve body in the axial direction while preventing the rotation, and the opening degree of the control hole (flow path) by the needle valve body is increased. As a result of the control, the flow rate is adjusted.

また、つまみは、基端側が目盛りカバーによって覆われるとともに、この目盛りカバーは、バルブケースの側面に固定された支持部材に固定されている。さらに、目盛りカバーは、つまみに対しては相対回転自在になっている。目盛りカバーには、つまみとの相対回転量を指示する目盛りが表示されている。そして、つまみを、目盛りを基準に回転させることによって、ニードル弁体がその目盛りに対応した位置にセットされ、制御孔の開度が制御されるとともに、制御孔の開度が計数化される。   Further, the base of the knob is covered with a scale cover, and the scale cover is fixed to a support member fixed to the side surface of the valve case. Further, the scale cover is rotatable relative to the knob. The scale cover displays a scale that indicates the amount of relative rotation with the knob. Then, by rotating the knob with reference to the scale, the needle valve body is set at a position corresponding to the scale, the opening degree of the control hole is controlled, and the opening degree of the control hole is counted.

特許第３０７４２８８号公報Japanese Patent No. 3074288

ところが、特許文献１には詳細に開示されていないが、制御孔の開度を計数化するためには、ニードル弁体を目盛りカバーの目盛りに対応した位置にセットする必要がある。このため、特許文献１のニードル弁においては、目盛りカバーとニードル弁体との間に、ニードル弁体の移動と、目盛りカバーの回転とを連動させるための制御機構を設ける必要があり、制御孔の開度を計数化するための構造が複雑化していた。また、特許文献１のニードル弁は、ニードル弁体をねじパイプに螺合して一体化し、さらに、つまみを回転させた際に、ニードル弁体の回転を阻止しつつ軸方向に移動させるために、シート部材を必要としている。よって、特許文献１のニードル弁は、ニードル弁体の移動に関する構造においても複雑化していた。   However, although not disclosed in detail in Patent Document 1, in order to count the opening degree of the control hole, it is necessary to set the needle valve body at a position corresponding to the scale of the scale cover. For this reason, in the needle valve of Patent Document 1, it is necessary to provide a control mechanism for interlocking the movement of the needle valve body and the rotation of the scale cover between the scale cover and the needle valve body. The structure for counting the degree of opening is complicated. In addition, the needle valve of Patent Document 1 is integrated with the needle valve body screwed into the threaded pipe, and further, when the knob is rotated, the needle valve body is moved in the axial direction while preventing the needle valve body from rotating. Need a sheet member. Therefore, the needle valve of Patent Document 1 is also complicated in the structure related to the movement of the needle valve body.

本発明は、このような従来の技術に存在する問題点に着目してなされたものである。その目的は、流路の開度を計数化する構造及びニードル弁体を移動させるための構造を簡単にすることができる流量制御弁を提供することにある。   The present invention has been made paying attention to such problems existing in the prior art. An object of the present invention is to provide a flow control valve capable of simplifying a structure for counting the opening degree of a flow path and a structure for moving a needle valve element.

上記問題点を解決するために、請求項１に記載の発明は、バルブハウジング内に収容されたニードル弁体を前記バルブハウジングの軸方向へ移動させることにより、前記バルブハウジングに形成された流路の開度を調節して、該流路の流量を調節する流量制御弁であって、前記バルブハウジングには螺子孔が形成されるとともに該螺子孔に前記ニードル弁体の螺子部が螺合され、前記バルブハウジングには、前記螺子部を前記螺子孔に対し螺進又は螺退させ前記ニードル弁体の弁部を前記流路に接近又は離間させるために前記ニードル弁体と一体回転可能な操作部材が設けられ、前記操作部材には、前記ニードル弁体において前記螺子部から延設された軸部を一体回転可能に保持する保持部が前記バルブハウジング内に位置するように形成されるとともに、前記保持部の外面には前記操作部材と一体回転する歯部が形成され、前記バルブハウジング内には前記歯部に噛合連結された歯車が回転可能に支持されるとともに表示リングが回転可能に支持され、前記表示リングの内周面に形成されたギヤに前記歯車が噛合連結されるとともに外周面には前記ニードル弁体の回転数を示す表示部が設けられていることを要旨とする。   In order to solve the above-mentioned problems, the invention according to claim 1 is directed to a flow path formed in the valve housing by moving a needle valve body accommodated in the valve housing in an axial direction of the valve housing. A flow rate control valve for adjusting the flow rate of the flow path by adjusting the opening of the valve housing, wherein a screw hole is formed in the valve housing, and a screw portion of the needle valve body is screwed into the screw hole. The valve housing has an operation that can rotate integrally with the needle valve body so that the screw portion is screwed or retreated with respect to the screw hole and the valve portion of the needle valve body approaches or separates from the flow path. A member is provided, and the operation member is formed such that a holding portion for holding a shaft portion extending from the screw portion in the needle valve body so as to be integrally rotatable is located in the valve housing. In addition, a tooth portion that rotates integrally with the operation member is formed on the outer surface of the holding portion, and a gear meshingly connected to the tooth portion is rotatably supported in the valve housing and the display ring rotates. The gear is meshed and connected to a gear formed on the inner peripheral surface of the display ring, and a display portion indicating the number of rotations of the needle valve body is provided on the outer peripheral surface. To do.

請求項２に記載の発明は、請求項１に記載の流量制御弁において、前記操作部材には、前記ニードル弁体と同軸上に正多角形状をなす被係止部が形成されるとともに、前記バルブハウジングには前記被係止部において互いに平行をなす一対の側面に係止する係止部が一対形成されていることを要旨とする。   According to a second aspect of the present invention, in the flow control valve according to the first aspect, the operation member is formed with a locked portion having a regular polygonal shape coaxially with the needle valve body, and The gist of the invention is that the valve housing is formed with a pair of locking portions that are locked to a pair of side surfaces that are parallel to each other in the locked portion.

請求項３に記載の発明は、請求項２に記載の流量制御弁において、前記歯部、歯車、及び表示リングと、前記被係止部、及び係止部とは、前記バルブハウジングの軸方向に位置ずれした位置に設けられていることを要旨とする。   According to a third aspect of the present invention, in the flow control valve according to the second aspect, the tooth portion, the gear, and the display ring, the locked portion, and the locking portion are in the axial direction of the valve housing. The gist is that it is provided at a position shifted in position.

請求項４に記載の発明は、請求項１〜請求項３のうちいずれか一項に記載の流量制御弁において、前記バルブハウジングには、前記表示部を前記バルブハウジング外へ臨ませる表示窓が形成されていることを要旨とする。   According to a fourth aspect of the present invention, in the flow rate control valve according to any one of the first to third aspects, the valve housing has a display window that faces the display portion outside the valve housing. The gist is that it is formed.

本発明によれば、流路の開度を計数化する構造及びニードル弁体を移動させるための構造を簡単にすることができる。   ADVANTAGE OF THE INVENTION According to this invention, the structure for counting the opening degree of a flow path and the structure for moving a needle valve body can be simplified.

実施形態のスピードコントローラを示す縦断面図。The longitudinal cross-sectional view which shows the speed controller of embodiment. 実施形態のスピードコントローラを示す斜視図。The perspective view which shows the speed controller of embodiment. 実施形態のスピードコントローラを示す図２の３−３線断面図。FIG. 3 is a cross-sectional view taken along line 3-3 of FIG. 2 illustrating the speed controller of the embodiment. 実施形態のスピードコントローラを示す図２の４−４線断面図。FIG. 4 is a sectional view taken along line 4-4 of FIG. 2 showing the speed controller of the embodiment. （ａ）はスピードコントローラの別例を示す部分断面図、（ｂ）は図５（ａ）のｂ−ｂ線断面図。(A) is a fragmentary sectional view which shows another example of a speed controller, (b) is the bb sectional view taken on the line of Fig.5 (a).

以下、本発明の流量制御弁をスピードコントローラに具体化した一実施形態を図１〜図４にしたがって説明する。
図１に示すように、スピードコントローラ１１のバルブハウジング１２は、円筒状をなす。このバルブハウジング１２は、バルブハウジング１２の一側部（下側部）を構成する円筒状の金属製の第１ハウジング１３と、この第１ハウジング１３に一体に組付けられてバルブハウジング１２の他側部（上側部）を構成する円筒状の合成樹脂製の第２ハウジング１４とから形成されている。バルブハウジング１２の中心軸Ｌの延びる方向をバルブハウジング１２、第１ハウジング１３、及び第２ハウジング１４の軸方向とする。 Hereinafter, an embodiment in which the flow control valve of the present invention is embodied in a speed controller will be described with reference to FIGS.
As shown in FIG. 1, the valve housing 12 of the speed controller 11 has a cylindrical shape. The valve housing 12 includes a cylindrical metal first housing 13 constituting one side portion (lower side portion) of the valve housing 12, and the valve housing 12 in addition to the valve housing 12. It is formed of a cylindrical synthetic resin second housing 14 that constitutes a side portion (upper portion). The direction in which the central axis L of the valve housing 12 extends is the axial direction of the valve housing 12, the first housing 13, and the second housing 14.

第１ハウジング１３における軸方向の一端側（下端側）には、その一端に開口し、流体としてのエアが導入されるエア導入孔１３ａが形成されている。このエア導入孔１３ａ内には、金属製のオリフィス１５が配設されるとともに、エア導入孔１３ａの周面と、この周面に対向するオリフィス１５の外周面との間にはゴム製のシール部材１６が介装されている。そして、オリフィス１５の内側には、エア導入孔１３ａに導入されたエアが流れる流路１５ａが形成されている。   An air introduction hole 13a is formed on one end side (lower end side) in the axial direction of the first housing 13 so as to open at one end thereof and introduce air as a fluid. A metal orifice 15 is disposed in the air introduction hole 13a, and a rubber seal is provided between the peripheral surface of the air introduction hole 13a and the outer peripheral surface of the orifice 15 facing the peripheral surface. A member 16 is interposed. A flow path 15a through which air introduced into the air introduction hole 13a flows is formed inside the orifice 15.

また、第１ハウジング１３の一端側には、第１ハウジング１３の側面に開口するとともにエア導入孔１３ａに連通し、流路１５ａを通過したエアが導出されるエア導出孔１３ｂが形成されている。第１ハウジング１３内には、エア導入孔１３ａの他端（上端）に連通する弁孔１３ｃが形成されるとともに、弁孔１３ｃの他端（上端）に連通する螺子孔１３ｄが形成されている。エア導入孔１３ａ、弁孔１３ｃ、及び螺子孔１３ｄは、第１ハウジング１３の同軸上に形成されている。   In addition, an air outlet hole 13b is formed on one end side of the first housing 13 so as to open to the side surface of the first housing 13 and communicate with the air introduction hole 13a so that the air passing through the flow path 15a is led out. . A valve hole 13c communicating with the other end (upper end) of the air introduction hole 13a is formed in the first housing 13, and a screw hole 13d communicating with the other end (upper end) of the valve hole 13c is formed. . The air introduction hole 13 a, the valve hole 13 c, and the screw hole 13 d are formed on the same axis of the first housing 13.

第１ハウジング１３の一端側外周には、継手１９が装着されている。継手１９は、その内部に形成された通路１９ａがエア導出孔１３ｂに連通するように、第１ハウジング１３に装着され、エア導出孔１３ｂから導出されたエアは、継手１９の通路１９ａを流れて流体圧機器へと供給される。第１ハウジング１３の一端側外周面には、第１ハウジング１３の外周面と、継手１９の内周面との間をシールするＯリング１３ｅが装着されている。   A joint 19 is attached to the outer periphery on the one end side of the first housing 13. The joint 19 is attached to the first housing 13 so that a passage 19a formed therein communicates with the air lead-out hole 13b, and the air led out from the air lead-out hole 13b flows through the passage 19a of the joint 19. Supplied to fluid pressure equipment. An O-ring 13 e that seals between the outer peripheral surface of the first housing 13 and the inner peripheral surface of the joint 19 is attached to the outer peripheral surface of the first housing 13 on one end side.

第１ハウジング１３の他端面（上端面）における縁寄りの位置には、軸孔１３ｆが凹設されるとともに、この軸孔１３ｆには、合成樹脂製の歯車２５の回転軸２５ａが回転可能に支持されている。この歯車２５は、第２ハウジング１４内に収容されている。   A shaft hole 13f is recessed at a position near the edge on the other end surface (upper end surface) of the first housing 13, and a rotation shaft 25a of a synthetic resin gear 25 is rotatable in the shaft hole 13f. It is supported. The gear 25 is accommodated in the second housing 14.

第２ハウジング１４の軸方向中央部の内周面には、環状をなす区画壁１４ａが第２ハウジング１４内に向けて突設されている。第２ハウジング１４内において、第１ハウジング１３の他端面と、区画壁１４ａとの間に区画された空間Ｓには、上記歯車２５が配設されている。歯車２５は、区画壁１４ａによって空間Ｓから飛び出ることが規制されている。また、図４に示すように、空間Ｓにおいて、歯車２５の外側には、軸部１７ｃに対して同心円状をなし、かつ円環状をなす合成樹脂製の表示リング２６が、歯車２５及び軸部１７ｃを囲むように配設されている。   On the inner peripheral surface of the axially central portion of the second housing 14, an annular partition wall 14 a is provided so as to project into the second housing 14. In the second housing 14, the gear 25 is disposed in a space S defined between the other end surface of the first housing 13 and the partition wall 14 a. The gear 25 is restricted from popping out of the space S by the partition wall 14a. In addition, as shown in FIG. 4, in the space S, on the outside of the gear 25, a synthetic resin display ring 26 that is concentric with the shaft portion 17 c and has an annular shape is formed on the gear 25 and the shaft portion. It is arrange | positioned so that 17c may be enclosed.

表示リング２６の内周面には、ギヤ２６ａが内周面の全周に亘って形成されるとともに、ギヤ２６ａは歯車２５に噛合連結されている。また、表示リング２６の外周面には、後述するニードル弁体１７の回転数を表示する表示部として、複数の第１目盛り２６ｂが等間隔おきに印字されている。第２ハウジング１４には、第１目盛り２６ｂを第２ハウジング１４外へ臨ませるための表示窓１４ｂが形成されている。また、図１及び図３に示すように、第２ハウジング１４内において、区画壁１４ａよりも他端側（上端側）には、一対の係止部１４ｃが互いに平行をなすように架設されている。係止部１４ｃそれぞれは弾性変形可能に形成されている。   A gear 26 a is formed on the inner peripheral surface of the display ring 26 over the entire inner peripheral surface, and the gear 26 a is meshed with the gear 25. A plurality of first scales 26b are printed at equal intervals on the outer peripheral surface of the display ring 26 as a display unit for displaying the rotational speed of a needle valve body 17 described later. The second housing 14 is formed with a display window 14 b for allowing the first scale 26 b to face the second housing 14. As shown in FIGS. 1 and 3, in the second housing 14, a pair of locking portions 14c are installed on the other end side (upper end side) of the partition wall 14a so as to be parallel to each other. Yes. Each of the locking portions 14c is formed to be elastically deformable.

図１及び図２に示すように、バルブハウジング１２（第２ハウジング１４）の他端（上端）には、有蓋円筒状をなす合成樹脂製の操作部材２１がバルブハウジング１２の中心軸Ｌを中心にして回転可能に設けられている。操作部材２１の内面中央部には、筒状の保持部２２が突設されている。この保持部２２は、先端側（下端側）の円筒状をなす連結部２３と、図３に示すように、基端側（上端側）の正多角形状（正八角筒状）をなす被係止部２４とから形成されている。図４に示すように、保持部２２の外面たる連結部２３の外面には、二条の歯部２３ａが保持部２２の軸方向へ延びるように形成されている。また、連結部２３の先端（下端）側の内面には、一対の係合溝２３ｂが連結部２３の径方向に対向する位置に形成されている。   As shown in FIGS. 1 and 2, the other end (upper end) of the valve housing 12 (second housing 14) is provided with an operation member 21 made of a synthetic resin having a covered cylindrical shape centering on the central axis L of the valve housing 12. And is rotatably provided. A cylindrical holding portion 22 protrudes from the center of the inner surface of the operation member 21. The holding portion 22 includes a connecting portion 23 having a cylindrical shape on the distal end side (lower end side) and a engaged portion having a regular polygonal shape (regular octagonal cylindrical shape) on the proximal end side (upper end side) as shown in FIG. The stop portion 24 is formed. As shown in FIG. 4, two teeth 23 a are formed on the outer surface of the connecting portion 23, which is the outer surface of the holding portion 22, so as to extend in the axial direction of the holding portion 22. In addition, a pair of engagement grooves 23 b are formed on the inner surface on the tip (lower end) side of the connecting portion 23 at positions facing the connecting portion 23 in the radial direction.

そして、図１に示すように、連結部２３は、区画壁１４ａの内側を通過して空間Ｓ内まで延設されるとともに、連結部２３の歯部２３ａは、歯車２５に噛合連結されている。よって、操作部材２１の回転に伴う連結部２３の回転は、歯部２３ａ及び歯車２５を介して表示リング２６に伝達され、操作部材２１の回転に連動して表示リング２６が回転するようになっている。具体的には、操作部材２１を１回転させると、操作部材２１と一体回転する歯部２３ａによって歯車２５が二条分だけ回転するとともに、歯車２５の回転に伴い表示リング２６が二条分だけ回転する。すると、表示窓１４ｂには、操作部材２１が１回転する前の第１目盛り２６ｂの値に１加算した値が表示される。   As shown in FIG. 1, the connecting portion 23 passes through the inside of the partition wall 14 a and extends into the space S, and the tooth portion 23 a of the connecting portion 23 is meshed with the gear 25. . Therefore, the rotation of the connecting portion 23 accompanying the rotation of the operation member 21 is transmitted to the display ring 26 via the tooth portion 23a and the gear 25, and the display ring 26 rotates in conjunction with the rotation of the operation member 21. ing. Specifically, when the operation member 21 is rotated once, the gear 25 is rotated by two lines by the tooth portion 23 a that rotates integrally with the operation member 21, and the display ring 26 is rotated by two lines as the gear 25 rotates. . Then, a value obtained by adding 1 to the value of the first scale 26b before the operation member 21 makes one rotation is displayed on the display window 14b.

また、被係止部２４は、一対の係止部１４ｃの内側に配設されている。被係止部２４の対向する一対の側面に対し、一対の係止部１４ｃそれぞれが係止して、被係止部２４の回転、すなわち、操作部材２１の回転が規制されている。一対の係止部１４ｃ及び被係止部２４は、歯部２３ａと、歯車２５と、表示リング２６とが噛合連結された部位に対し、バルブハウジング１２の軸方向へ位置ずれした位置に配設されている。   Moreover, the to-be-latched part 24 is arrange | positioned inside a pair of latching | locking part 14c. The pair of locking portions 14c are locked to the pair of opposing side surfaces of the locked portion 24, and the rotation of the locked portion 24, that is, the rotation of the operation member 21 is restricted. The pair of locking portions 14c and the locked portion 24 are disposed at positions displaced in the axial direction of the valve housing 12 with respect to the portion where the tooth portion 23a, the gear 25, and the display ring 26 are meshed and connected. Has been.

バルブハウジング１２内には、金属製のニードル弁体１７が収容されている。このニードル弁体１７は、軸方向の一端側（下端側）に先細テーパ状をなす弁部１７ａを備える。弁部１７ａの周面にはＯリング１７ｄが装着されている。また、ニードル弁体１７は、軸方向の中央部付近に螺子部１７ｂを備えるとともに、軸方向の他端側（上端側）に螺子部１７ｂから延設された軸部１７ｃを備える。軸部１７ｃには、軸部１７ｃの径方向に対向する位置に一対の係合突起１７ｅが突設されている。   A metal needle valve body 17 is accommodated in the valve housing 12. The needle valve body 17 includes a valve portion 17a having a tapered shape on one end side (lower end side) in the axial direction. An O-ring 17d is mounted on the peripheral surface of the valve portion 17a. The needle valve body 17 includes a screw portion 17b near the central portion in the axial direction, and a shaft portion 17c that extends from the screw portion 17b on the other end side (upper end side) in the axial direction. The shaft portion 17c is provided with a pair of engaging projections 17e at positions facing the shaft portion 17c in the radial direction.

そして、ニードル弁体１７は、軸部１７ｃが保持部２２内に圧入されるとともに、一対の係合突起１７ｅが連結部２３の係合溝２３ｂに係合されて操作部材２１と一体回転可能に保持されている。したがって、操作部材２１を１回転させると、ニードル弁体１７も１回転し、歯部２３ａによって歯車２５が二条分だけ回転するとともに、歯車２５の回転に伴い表示リング２６が二条分だけ回転する。その結果、表示窓１４ｂには、ニードル弁体１７が１回転する前の第１目盛り２６ｂの値に１加算した値が表示される。したがって、歯部２３ａ、歯車２５、及び表示リング２６によって、ニードル弁体１７の回転数を計数化し、流路１５ａの開度を計数化するための構造が形成されている。   The needle valve body 17 has the shaft portion 17c press-fitted into the holding portion 22, and the pair of engaging protrusions 17e are engaged with the engaging grooves 23b of the connecting portion 23 so that the needle valve body 17 can rotate integrally with the operating member 21. Is retained. Therefore, when the operation member 21 is rotated once, the needle valve body 17 is also rotated one time, the gear 25 is rotated by two lines by the tooth portion 23a, and the display ring 26 is rotated by two lines as the gear 25 is rotated. As a result, the display window 14b displays a value obtained by adding 1 to the value of the first scale 26b before the needle valve body 17 rotates once. Therefore, the tooth portion 23a, the gear 25, and the display ring 26 form a structure for counting the number of rotations of the needle valve body 17 and counting the opening degree of the flow path 15a.

また、ニードル弁体１７は、保持部２２の連結部２３及び被係止部２４と同軸上に位置している。ニードル弁体１７は、螺子部１７ｂが螺子孔１３ｄに螺合されるとともに、この螺合状態で弁部１７ａが弁孔１３ｃ内に配置されている。   Further, the needle valve body 17 is positioned coaxially with the connecting portion 23 and the locked portion 24 of the holding portion 22. In the needle valve body 17, the screw portion 17b is screwed into the screw hole 13d, and the valve portion 17a is disposed in the valve hole 13c in this screwed state.

そして、操作部材２１によってニードル弁体１７を回転させることにより、ニードル弁体１７が操作部材２１と同じ方向に回転する。すると、螺子部１７ｂが螺子孔１３ｄに対し螺進又は螺退し、ニードル弁体１７がバルブハウジング１２の中心軸Ｌの延びる方向（軸方向）に沿って移動して弁部１７ａが流路１５ａ（エア導入孔１３ａ）に対して接近又は離間可能になっている。弁部１７ａが流路１５ａに対し接近すると、流路１５ａにおける流量が減少され、弁部１７ａが流路１５ａに対し離間すると、流路１５ａにおける流量が増大される。よって、螺子部１７ｂと螺子孔１３ｄとから、ニードル弁体１７をバルブハウジング１２の軸方向へ移動させるための構造が形成されている。   Then, by rotating the needle valve body 17 with the operation member 21, the needle valve body 17 rotates in the same direction as the operation member 21. Then, the screw portion 17b is screwed or unscrewed with respect to the screw hole 13d, the needle valve body 17 moves along the direction (axial direction) in which the central axis L of the valve housing 12 extends, and the valve portion 17a is moved to the flow path 15a. It can be approached or separated from the (air introduction hole 13a). When the valve portion 17a approaches the flow channel 15a, the flow rate in the flow channel 15a is decreased, and when the valve portion 17a is separated from the flow channel 15a, the flow rate in the flow channel 15a is increased. Therefore, a structure for moving the needle valve body 17 in the axial direction of the valve housing 12 is formed from the screw portion 17b and the screw hole 13d.

また、操作部材２１及びニードル弁体１７は、１回転（３６０度）を、被係止部２４の側面の数で割った値（本実施形態では３６０度／８面＝４５度）を１段階として回転可能になっている。操作部材２１の先端面（上端面）には、第２目盛り２１ａ（０〜７）が操作部材２１の周方向に等間隔おきに印字されている。この第２目盛り２１ａは、ニードル弁体１７の１回転内での回転量を表示している。そして、バルブハウジング１２の軸方向において、表示窓１４ｂと同軸上に位置する第２目盛り２１ａが、ニードル弁体１７を１回転内で何段階回転させたかを示すようになっている。例えば、表示窓１４ｂと同軸上に位置する第２目盛り２１ａが「０」になったとき、ニードル弁体１７は１回転内での回転量が０であり、表示窓１４ｂと同軸上に位置する第２目盛り２１ａが「３」になったとき、ニードル弁体１７は３段階回転させたことになる。   In addition, the operation member 21 and the needle valve body 17 have one stage of a value obtained by dividing one rotation (360 degrees) by the number of side surfaces of the locked portion 24 (360 degrees / 8 surfaces = 45 degrees in this embodiment). It is possible to rotate as. On the front end surface (upper end surface) of the operation member 21, second scales 21 a (0 to 7) are printed at equal intervals in the circumferential direction of the operation member 21. The second scale 21a displays the amount of rotation of the needle valve body 17 within one rotation. In the axial direction of the valve housing 12, the second scale 21a positioned coaxially with the display window 14b indicates how many steps the needle valve body 17 has been rotated within one rotation. For example, when the second scale 21a positioned coaxially with the display window 14b becomes “0”, the needle valve body 17 has a rotation amount of 0 within one rotation and is positioned coaxially with the display window 14b. When the second scale 21a is “3”, the needle valve body 17 is rotated in three stages.

さて、上記スピードコントローラ１１によって、流量を所定量に調節する場合、操作部材２１を４５度ずつ回転させて、操作部材２１を１段階ずつ回転させると、その１段階の回転量に応じてニードル弁体１７の螺子部１７ｂが一定量ずつ螺子孔１３ｄに対し螺進又は螺退する。すると、操作部材２１の１段階の回転に応じて流路１５ａの開度が変更され、その変更に応じて流量が調節される。   When the flow rate is adjusted to a predetermined amount by the speed controller 11, when the operation member 21 is rotated 45 degrees and the operation member 21 is rotated step by step, the needle valve is set according to the rotation amount of the one step. The screw portion 17b of the body 17 is screwed or screwed into the screw hole 13d by a certain amount. Then, the opening degree of the flow path 15a is changed according to the one-stage rotation of the operation member 21, and the flow rate is adjusted according to the change.

操作部材２１を４５度回転させる際、両係止部１４ｃは被係止部２４の角部によって内側から外方へ押圧され互いの間隔を広げるように撓み変形する。そして、操作部材２１が４５度回動すると、両係止部１４ｃは原形状に復帰するとともに、被係止部２４の一対の側面に係止する。すると、操作部材２１の回転が規制されるとともに、ニードル弁体１７の移動が規制される。   When the operation member 21 is rotated by 45 degrees, both the locking portions 14c are pressed outward from the inside by the corner portions of the locked portions 24, and are bent and deformed so as to widen the interval therebetween. When the operation member 21 rotates 45 degrees, both the locking portions 14 c return to the original shape and are locked to the pair of side surfaces of the locked portion 24. Then, the rotation of the operation member 21 is restricted and the movement of the needle valve element 17 is restricted.

また、操作部材２１が１回転すると、歯部２３ａによって歯車２５が二条分だけ回転するとともに、歯車２５の回転に伴い表示リング２６が二条分だけ回転する。すると、表示窓１４ｂには、操作部材２１が１回転する前の第１目盛り２６ｂの値（例えば、１０）に１加算した値（例えば、１１）が表示され、操作部材２１の回転数が目視可能になる。そして、表示窓１４ｂに表示された第１目盛り２６ｂを目視することにより、操作部材２１の回転数が表示されるとともに、この回転数に基づき流路１５ａの開度が計数化される。   When the operation member 21 is rotated once, the gear 25 is rotated by two lines by the tooth portion 23a, and the display ring 26 is rotated by two lines as the gear 25 is rotated. Then, a value (for example, 11) obtained by adding 1 to the value (for example, 10) of the first scale 26b before the operation member 21 rotates once is displayed on the display window 14b, and the rotation speed of the operation member 21 is visually checked. It becomes possible. Then, by visually observing the first scale 26b displayed on the display window 14b, the rotational speed of the operation member 21 is displayed, and the opening degree of the flow path 15a is counted based on this rotational speed.

また、操作部材２１を１回転内で回転させたときは、第１目盛り２６ｂの値は変更されないが、その１回転内での回転量は第２目盛り２１ａによって目視可能になる。そして、表示窓１４ｂと同軸上に位置する第２目盛り２１ａを目視することにより、操作部材２１の１回転内での回転量が表示されるとともに、この回転量に基づき流路１５ａの開度が計数化される。したがって、第１目盛り２６ｂと第２目盛り２１ａとから、ニードル弁体１７の回転数が正確に計数化され、流路１５ａの開度を正確に把握することができる。   Further, when the operation member 21 is rotated within one rotation, the value of the first scale 26b is not changed, but the rotation amount within the one rotation can be visually confirmed by the second scale 21a. Then, by visually observing the second scale 21a located coaxially with the display window 14b, the rotation amount within one rotation of the operation member 21 is displayed, and the opening degree of the flow path 15a is determined based on this rotation amount. It is counted. Therefore, the rotational speed of the needle valve body 17 is accurately counted from the first scale 26b and the second scale 21a, and the opening degree of the flow path 15a can be accurately grasped.

上記実施形態によれば、以下のような効果を得ることができる。
（１）操作部材２１の保持部２２にニードル弁体１７を保持させ、操作部材２１とニードル弁体１７とを一体回転にした。また、バルブハウジング１２内において、保持部２２（連結部２３）に歯部２３ａを形成し、この歯部２３ａに対し歯車２５を噛合連結するとともに、歯車２５に対し表示リング２６のギヤ２６ａを噛合連結させた。さらに、表示リング２６に第１目盛り２６ｂを印字した。そして、操作部材２１の回転により、歯部２３ａ、歯車２５、及び表示リング２６を回転させ、ニードル弁体１７の回転数を第１目盛り２６ｂにより表示させた。よって、歯部２３ａ、歯車２５、表示リング２６といった簡単な構造により、流路１５ａの開度を計数化することができる。 According to the above embodiment, the following effects can be obtained.
(1) The needle valve body 17 is held by the holding portion 22 of the operation member 21, and the operation member 21 and the needle valve body 17 are integrally rotated. Further, in the valve housing 12, a tooth portion 23 a is formed on the holding portion 22 (connecting portion 23), and the gear 25 is meshed with the tooth portion 23 a and the gear 26 a of the display ring 26 is meshed with the gear 25. Connected. Further, the first scale 26 b was printed on the display ring 26. And the tooth | gear part 23a, the gearwheel 25, and the display ring 26 were rotated by rotation of the operation member 21, and the rotation speed of the needle valve body 17 was displayed by the 1st scale 26b. Therefore, the opening degree of the flow path 15a can be counted by a simple structure such as the tooth portion 23a, the gear 25, and the display ring 26.

（２）また、ニードル弁体１７は、操作部材２１の保持部２２に保持されて操作部材２１と一体回転可能になっているとともに、ニードル弁体１７の螺子部１７ｂが、バルブハウジング１２の螺子孔１３ｄに螺合されている。そして、操作部材２１を回転させることにより、ニードル弁体１７を直接回転させて、螺子部１７ｂを螺子孔１３ｄに対し螺進又は螺退させることができる。よって、ニードル弁体１７を、その回転を阻止させながら移動させる場合と異なり、螺子孔１３ｄと螺子部１７ｂといった簡単な構造でニードル弁体１７を移動させることができる。   (2) The needle valve body 17 is held by the holding portion 22 of the operation member 21 so as to be rotatable integrally with the operation member 21, and the screw portion 17 b of the needle valve body 17 is screwed to the valve housing 12. Screwed into the hole 13d. Then, by rotating the operation member 21, the needle valve body 17 can be directly rotated, and the screw portion 17b can be screwed or screwed with respect to the screw hole 13d. Therefore, unlike the case where the needle valve body 17 is moved while preventing its rotation, the needle valve body 17 can be moved with a simple structure such as the screw hole 13d and the screw portion 17b.

（３）操作部材２１に一体形成された保持部２２には、正八角筒状の被係止部２４が形成されるとともに、バルブハウジング１２には、被係止部２４を挟むように一対の係止部１４ｃが形成されている。そして、被係止部２４の一対の側面に係止部１４ｃが係止して、操作部材２１の回転を規制することができる。したがって、操作部材２１の回転を規制するための構造を簡単に設けることができるとともに、例えば、操作部材２１に対し、キー等を差し込んで操作部材２１の回転を規制する場合と比較して操作部材２１の回転を確実に規制することができる。   (3) The holding portion 22 formed integrally with the operation member 21 is formed with a regular octagonal cylindrical locked portion 24 and a pair of valve housings 12 with the locked portion 24 interposed therebetween. A locking portion 14c is formed. And the latching | locking part 14c latches on a pair of side surface of the to-be-latched part 24, and rotation of the operation member 21 can be controlled. Therefore, a structure for restricting the rotation of the operation member 21 can be easily provided, and, for example, the operation member is compared with a case where a key or the like is inserted into the operation member 21 to restrict the rotation of the operation member 21. The rotation of 21 can be reliably controlled.

（４）操作部材２１に一体形成された保持部２２には、正八角筒状の被係止部２４が形成されるとともに、バルブハウジング１２には、被係止部２４を挟むように一対の係止部１４ｃが形成されている。そして、被係止部２４の一対の側面に係止部１４ｃが係止する。よって、操作部材２１を１段階回転させると同時に、操作部材２１の回転を規制することができる。また、被係止部２４と係止部１４ｃとにより、操作部材２１の１回転内での回転量を等分に設定することができる。   (4) The holding portion 22 integrally formed with the operation member 21 is formed with a regular octagonal cylindrical locked portion 24, and the valve housing 12 has a pair of the locked portion 24 so as to sandwich the locked portion 24. A locking portion 14c is formed. Then, the locking portion 14 c is locked to the pair of side surfaces of the locked portion 24. Therefore, the rotation of the operation member 21 can be restricted at the same time as the operation member 21 is rotated by one step. Further, the amount of rotation of the operation member 21 within one rotation can be set equally by the locked portion 24 and the locking portion 14c.

（５）操作部材２１の回転を規制するための構造（一対の係止部１４ｃと被係止部２４）は、ニードル弁体１７の回転数を計数化するための構造（歯部２３ａと、歯車２５と、表示リング２６）に対し、バルブハウジング１２の軸方向へ位置ずれした位置に配設されている。このため、例えば、操作部材２１の回転を規制するための構造と、ニードル弁体１７の回転数を計数化するための構造とが、バルブハウジング１２の軸方向において同一平面内に設けられる場合と異なり、スピードコントローラ１１の構造を簡単にすることができるとともに、スピードコントローラ１１の組立作業を容易にすることができる。   (5) The structure for restricting the rotation of the operation member 21 (the pair of locking portions 14c and the locked portion 24) has a structure for counting the number of rotations of the needle valve body 17 (tooth portion 23a, With respect to the gear 25 and the display ring 26), the valve housing 12 is disposed at a position displaced in the axial direction. For this reason, for example, the structure for restricting the rotation of the operation member 21 and the structure for counting the number of rotations of the needle valve body 17 are provided in the same plane in the axial direction of the valve housing 12. In contrast, the structure of the speed controller 11 can be simplified, and the assembly work of the speed controller 11 can be facilitated.

（６）ニードル弁体１７は、その螺子部１７ｂがバルブハウジング１２の螺子孔１３ｄに対し螺進又は螺退することで移動する。すなわち、ニードル弁体１７は、バルブハウジング１２に直接形成された螺子孔１３ｄによってバルブハウジング１２の軸方向へ移動するようにガイドされる。したがって、背景技術のように、バルブケースとは別体に設けられたシート部材によって、ニードル弁体を軸方向に移動させる場合と異なり、本実施形態のニードル弁体１７を軸ずれさせることなく移動させることができる。   (6) The needle valve body 17 moves when the screw portion 17b is screwed or retreated relative to the screw hole 13d of the valve housing 12. That is, the needle valve body 17 is guided so as to move in the axial direction of the valve housing 12 by a screw hole 13 d formed directly in the valve housing 12. Accordingly, unlike the case of moving the needle valve body in the axial direction by the seat member provided separately from the valve case as in the background art, the needle valve body 17 of the present embodiment moves without being misaligned. Can be made.

（７）ニードル弁体１７は、軸部１７ｃを操作部材２１の保持部２２に圧入することにより、操作部材２１と一体回転可能になっている。よって、操作部材２１とニードル弁体１７とを簡単な構成で一体化することができる。   (7) The needle valve body 17 can rotate integrally with the operation member 21 by press-fitting the shaft portion 17 c into the holding portion 22 of the operation member 21. Therefore, the operation member 21 and the needle valve body 17 can be integrated with a simple configuration.

（８）バルブハウジング１２には、第１目盛り２６ｂをバルブハウジング１２外へ臨ませる表示窓１４ｂが形成されている。よって、操作部材２１の回転数を表示した第１目盛り２６ｂ以外は、第２ハウジング１４によって覆われることになる。したがって、例えば、全ての第１目盛り２６ｂを露出させるとともに矢印によって指し示された第１目盛り２６ｂによって操作部材２１の回転数を表示させる場合と比較して、第１目盛り２６ｂを目視しやすくすることができる。   (8) The valve housing 12 is formed with a display window 14 b that allows the first scale 26 b to face the valve housing 12. Therefore, the second housing 14 is covered except for the first scale 26b displaying the rotation speed of the operation member 21. Therefore, for example, all the first scales 26b are exposed, and the first scale 26b is made easier to see compared to the case where the rotation speed of the operation member 21 is displayed by the first scale 26b indicated by the arrow. Can do.

なお、上記実施形態は以下のように変更してもよい。
・ 図５（ｂ）に示すように、保持部２２の内面を正六角筒状（正多角形状）に形成するとともに、軸部１７ｃを正六角柱状に形成し、操作部材２１に対しニードル弁体１７を一体回転可能にする。また、図５（ａ）に示すように、軸部１７ｃに対し保持部２２をスライド移動可能にする。さらに、操作部材２１の内奥面に一対の係合凸部２１ｃを突設するとともに、バルブハウジング１２（第２ハウジング１４）の他端（上端）に、係合凸部２１ｃに係合可能な係合凹部１４ｄを形成する。また、バルブハウジング１２（第２ハウジング１４）の他端側（上端側）の外周面に規制凹部１４ｅを形成するとともに、操作部材２１の内周面に規制凹部１４ｅに係止可能な規制凸部２１ｅを形成する。 In addition, you may change the said embodiment as follows.
5B, the inner surface of the holding portion 22 is formed in a regular hexagonal cylinder shape (regular polygonal shape), and the shaft portion 17c is formed in a regular hexagonal column shape. 17 can be rotated together. Further, as shown in FIG. 5A, the holding portion 22 is slidable with respect to the shaft portion 17c. Further, a pair of engaging convex portions 21c are provided on the inner back surface of the operating member 21 and can be engaged with the engaging convex portion 21c at the other end (upper end) of the valve housing 12 (second housing 14). An engaging recess 14d is formed. In addition, a restriction recess 14e is formed on the outer peripheral surface on the other end side (upper end side) of the valve housing 12 (second housing 14), and a restriction protrusion that can be locked to the restriction recess 14e on the inner peripheral surface of the operation member 21. 21e is formed.

このように構成した場合、操作部材２１を回転させ、ニードル弁体１７の螺子部１７ｂを螺子孔１３ｄに対し螺進又は螺退させた場合、軸部１７ｃに対し操作部材２１はスライド移動するため、操作部材２１の高さを一定とすることができる。また、操作部材２１を回転させる際、規制凹部１４ｅと規制凸部２１ｅの係止により、操作部材２１がバルブハウジング１２に向けて移動することが規制されている。そして、操作部材２１の回転を停止させた後は、規制凸部２１ｅを規制凹部１４ｅから離脱させ、操作部材２１をバルブハウジング１２に向けて移動させるとともに、係合凸部２１ｃを係合凹部１４ｄに係合させる。すると、この係合により、操作部材２１の回転が規制される。   In such a configuration, when the operation member 21 is rotated and the screw portion 17b of the needle valve body 17 is screwed or retreated relative to the screw hole 13d, the operation member 21 slides relative to the shaft portion 17c. The height of the operation member 21 can be made constant. Further, when the operation member 21 is rotated, the operation member 21 is restricted from moving toward the valve housing 12 by the locking of the restriction concave portion 14e and the restriction convex portion 21e. Then, after the rotation of the operation member 21 is stopped, the restriction convex portion 21e is detached from the restriction concave portion 14e, the operation member 21 is moved toward the valve housing 12, and the engagement convex portion 21c is moved to the engagement concave portion 14d. Engage with. Then, the rotation of the operation member 21 is restricted by this engagement.

・ 実施形態において、操作部材２１の回転を規制する一対の係止部１４ｃは無くてもよい。
・ 流体として液体の流量を調節する流量制御弁に本発明を適用してもよい。 -In embodiment, a pair of latching | locking part 14c which controls rotation of the operation member 21 may not be.
-You may apply this invention to the flow control valve which adjusts the flow volume of the liquid as a fluid.

・ 被係止部２４の形状は、正六角形状や正方形状に変更してもよい。すなわち、被係止部２４の形状は、ニードル弁体１７の１段階の回転量に応じて変更してもよい。
・ 係止部１４ｃは、被係止部２４の回転を規制できるのであれば、３つ以上形成されていてもよい。 -You may change the shape of the to-be-latched part 24 in a regular hexagon shape or square shape. That is, the shape of the locked portion 24 may be changed according to the amount of rotation of the needle valve body 17 in one step.
-As long as the latching | locking part 14c can control rotation of the to-be-latched part 24, three or more may be formed.

次に、上記実施形態及び別例から把握できる技術的思想について以下に追記する。
（イ）前記ニードル弁体は前記保持部に圧入されている請求項１〜請求項４のうちいずれか一項に記載の流量制御弁。 Next, the technical idea that can be grasped from the above embodiment and other examples will be described below.
(A) The flow rate control valve according to any one of claims 1 to 4, wherein the needle valve body is press-fitted into the holding portion.

１１…流量制御弁としてのスピードコントローラ、１２…バルブハウジング、１３ｄ…螺子孔、１４ｂ…表示窓、１４ｃ…係止部、１５ａ…流路、１７…ニードル弁体、１７ａ…弁部、１７ｂ…螺子部、１７ｃ…軸部、２１…操作部材、２２…保持部、２３ａ…歯部、２４…被係止部、２５…歯車、２６…表示リング、２６ａ…ギヤ、２６ｂ…表示部としての第１目盛り。   DESCRIPTION OF SYMBOLS 11 ... Speed controller as flow control valve, 12 ... Valve housing, 13d ... Screw hole, 14b ... Display window, 14c ... Locking part, 15a ... Flow path, 17 ... Needle valve body, 17a ... Valve part, 17b ... Screw 17c ... shaft part, 21 ... operation member, 22 ... holding part, 23a ... tooth part, 24 ... locked part, 25 ... gear, 26 ... display ring, 26a ... gear, 26b ... first as display part scale.

Claims (4)

バルブハウジング内に収容されたニードル弁体を前記バルブハウジングの軸方向へ移動させることにより、前記バルブハウジングに形成された流路の開度を調節して、該流路の流量を調節する流量制御弁であって、
前記バルブハウジングには螺子孔が形成されるとともに該螺子孔に前記ニードル弁体の螺子部が螺合され、
前記バルブハウジングには、前記螺子部を前記螺子孔に対し螺進又は螺退させ前記ニードル弁体の弁部を前記流路に接近又は離間させるために前記ニードル弁体と一体回転可能な操作部材が設けられ、
前記操作部材には、前記ニードル弁体において前記螺子部から延設された軸部を一体回転可能に保持する保持部が前記バルブハウジング内に位置するように形成されるとともに、前記保持部の外面には前記操作部材と一体回転する歯部が形成され、
前記バルブハウジング内には前記歯部に噛合連結された歯車が回転可能に支持されるとともに表示リングが回転可能に支持され、前記表示リングの内周面に形成されたギヤに前記歯車が噛合連結されるとともに外周面には前記ニードル弁体の回転数を示す表示部が設けられている流量制御弁。 A flow rate control that adjusts the flow rate of the flow path by adjusting the opening of the flow path formed in the valve housing by moving the needle valve element housed in the valve housing in the axial direction of the valve housing. A valve,
A screw hole is formed in the valve housing, and a screw portion of the needle valve body is screwed into the screw hole,
The valve housing has an operation member that can rotate integrally with the needle valve body so that the screw portion is screwed or retreated with respect to the screw hole, and the valve portion of the needle valve body approaches or separates from the flow path. Is provided,
The operating member is formed with a holding portion for holding a shaft portion extending from the screw portion in the needle valve body so as to be integrally rotatable, and is located in the valve housing, and an outer surface of the holding portion. Is formed with teeth that rotate integrally with the operating member,
A gear meshingly connected to the tooth portion is rotatably supported in the valve housing and a display ring is rotatably supported, and the gear is meshed and connected to a gear formed on an inner peripheral surface of the display ring. And a flow rate control valve provided with an indicator on the outer peripheral surface indicating the rotational speed of the needle valve body. 前記操作部材には、前記ニードル弁体と同軸上に正多角形状をなす被係止部が形成されるとともに、前記バルブハウジングには前記被係止部において互いに平行をなす一対の側面に係止する係止部が一対形成されている請求項１に記載の流量制御弁。   The operating member is formed with a locked portion having a regular polygonal shape coaxially with the needle valve body, and the valve housing is locked to a pair of side surfaces parallel to each other at the locked portion. The flow control valve according to claim 1, wherein a pair of locking portions to be formed is formed. 前記歯部、歯車、及び表示リングと、前記被係止部、及び係止部とは、前記バルブハウジングの軸方向に位置ずれした位置に設けられている請求項２に記載の流量制御弁。   The flow control valve according to claim 2, wherein the tooth portion, the gear, the display ring, the locked portion, and the locking portion are provided at positions shifted in the axial direction of the valve housing. 前記バルブハウジングには、前記表示部を前記バルブハウジング外へ臨ませる表示窓が形成されている請求項１〜請求項３のうちいずれか一項に記載の流量制御弁。   The flow rate control valve according to any one of claims 1 to 3, wherein the valve housing is formed with a display window that faces the display portion to the outside of the valve housing.
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CN101994871B (en) 2015-03-11
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KR101510360B1 (en) 2015-04-14
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JP5350941B2 (en) 2013-11-27
CN101994871A (en) 2011-03-30

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