JP6825184B2

JP6825184B2 - Flow control valve

Info

Publication number: JP6825184B2
Application number: JP2016214610A
Authority: JP
Inventors: 将伍須藤
Original assignee: Anest Iwata Corp
Current assignee: Anest Iwata Corp
Priority date: 2016-11-01
Filing date: 2016-11-01
Publication date: 2021-02-03
Anticipated expiration: 2036-11-01
Also published as: JP2018071727A

Description

本発明は流量制御弁に関する。 The present invention relates to a flow control valve.

特許文献１には、有底筒状に形成されたケーシングと、該ケーシングの底部に設けられ、色替弁装置に接続される流入口と、前記ケーシングの径方向外側に設けられ、塗装機に接続される流出口と、前記ケーシングの上部側を施蓋して設けられたカバーと、前記ケーシングと該カバーとの間に挟持され、前記ケーシング内を上側に位置する制御圧室と下側に位置する塗料室とに画成するダイヤフラムと、該ダイヤフラムの内周側に設けられたスピンドルと、基端側が弁軸となって該スピンドルと同軸に設けられ、先端側が前記流入口を開，閉する弁部となった弁体とからなるペイントレギュレータにおいて、前記スピンドルの下面側には前記弁体の弁軸外周側を取囲む環状溝部を設けると共に、該環状溝部の周方向に離間して接線方向に複数の分岐溝部を設けたことを特徴とするペイントレギュレータが開示されている。 In Patent Document 1, a casing formed in a bottomed tubular shape, an inflow port provided at the bottom of the casing and connected to a color change valve device, and a casing provided on the radial outer side of the casing are provided in a coating machine. The outlet to be connected, the cover provided by covering the upper side of the casing, and the control pressure chamber located on the upper side and the lower side in the casing sandwiched between the casing and the cover. A diaphragm defined in the located paint chamber, a spindle provided on the inner peripheral side of the diaphragm, and a base end side as a valve shaft are provided coaxially with the spindle, and the tip side opens and closes the inflow port. In a paint regulator composed of a valve body that serves as a valve portion, an annular groove portion that surrounds the valve shaft outer peripheral side of the valve body is provided on the lower surface side of the spindle, and tangent lines are separated from each other in the circumferential direction of the annular groove portion. A paint regulator characterized in that a plurality of branch grooves are provided in the direction is disclosed.

そして、特許文献１では、スピンドルの下面側には弁体の弁軸外周側を取囲む環状溝部を設けると共に、該環状溝部の周方向に離間して接線方向に複数の分岐溝部を設ける構成としたから、洗浄液が流入口を介して塗料室内に流入すると、この洗浄液は環状溝部を介して各分岐溝部内に流入し、該各分岐溝部によって旋回力を付与されつつ塗料室内に流出することにより、旋回流となり、この結果、洗浄液全体の流体力を均一化して高めることができ、旋回流と化した洗浄液によって塗料室内に残存した塗料を効果的に洗浄し、洗浄効率を高めて塗装品質や信頼性等を向上することができ、また、少ない洗浄液でも効果的に塗料を洗浄できるから、洗浄時間を短縮することができ、洗浄コストを低減することができると記載されている。 Further, in Patent Document 1, an annular groove portion surrounding the valve shaft outer peripheral side of the valve body is provided on the lower surface side of the spindle, and a plurality of branch groove portions are provided in the tangential direction separated from the annular groove portion in the circumferential direction. Therefore, when the cleaning liquid flows into the coating chamber through the inflow port, the cleaning liquid flows into each branch groove through the annular groove, and flows out into the coating chamber while being given a swirling force by each branch groove. As a result, the fluid force of the entire cleaning liquid can be made uniform and enhanced, and the paint remaining in the paint chamber is effectively cleaned by the cleaning liquid that has become a swirling flow, and the cleaning efficiency is improved to improve the coating quality. It is stated that the reliability and the like can be improved, and that the paint can be effectively washed with a small amount of cleaning liquid, so that the cleaning time can be shortened and the cleaning cost can be reduced.

特開平０６−１３４３５８号公報Japanese Unexamined Patent Publication No. 06-134358

しかしながら、より少ない洗浄液でも効果的に塗料等を洗浄することができ、洗浄時間の短縮化とともに、洗浄コストの低減が行えることが好ましい。 However, it is preferable that the paint and the like can be effectively cleaned with a smaller amount of cleaning liquid, the cleaning time can be shortened, and the cleaning cost can be reduced.

本発明は、このような事情に鑑みてなされたものであり、塗料等の液体の流量を制御する流量制御弁において、短時間で効率よく、少ない洗浄液で洗浄することができる流量制御弁を提供することを目的とする。 The present invention has been made in view of such circumstances, and provides a flow rate control valve for controlling the flow rate of a liquid such as a paint, which can be efficiently washed with a small amount of cleaning liquid in a short time. The purpose is to do.

本発明は、上記目的を達成するために、以下の構成によって把握される。
（１）本発明の流量制御弁は、他方側から一方側に連通する液体供給口を有する本体部と、一方側の前記本体部上に配置されたダイアフラムと、前記ダイアフラムに取り付けられ、前記ダイアフラムの駆動によって、前記液体供給口の開度を制御する弁体と、を備え、前記本体部は、前記液体供給口から供給される液体を前記本体部外に流出する液体流出口と、前記液体供給口と前記液体流出口の間を円弧状に接続する１つだけの溝状の接続流路と、を備えている。 The present invention is grasped by the following configuration in order to achieve the above object.
(1) The flow control valve of the present invention has a main body having a liquid supply port communicating from the other side to one side, a diaphragm arranged on the main body on one side, and a diaphragm attached to the diaphragm. The main body includes a valve body that controls the opening degree of the liquid supply port by driving the liquid supply port, and the main body has a liquid outlet for flowing out the liquid supplied from the liquid supply port to the outside of the main body and the liquid. It is provided with only one groove-shaped connecting flow path that connects the supply port and the liquid outlet in an arc shape.

（２）上記（１）の構成において、一方側に配置され、前記ダイアフラムを前記本体部とで挟持するとともに、前記ダイアフラムとの間に空間を形成する蓋部と、前記蓋部に設けられ、前記ダイアフラムを駆動させる気体を前記空間に供給する気体供給部と、を備えている。 (2) In the configuration of the above (1), a lid portion arranged on one side, sandwiching the diaphragm with the main body portion, and forming a space between the diaphragm and the lid portion, and provided on the lid portion. It is provided with a gas supply unit that supplies the gas that drives the diaphragm to the space.

（３）上記（１）又は（２）の構成において、前記ダイアフラムに取り付けられ、前記液体供給口に挿入されるリング状壁部を有する仕切り部を備え、前記リング状壁部には、前記接続流路に液体を流出させる流出部が形成されている。 (3) In the configuration of the above (1) or (2), the partition portion having a ring-shaped wall portion attached to the diaphragm and inserted into the liquid supply port is provided, and the ring-shaped wall portion is connected to the connection portion. An outflow portion is formed in the flow path to allow the liquid to flow out.

（４）上記（３）の構成において、前記流出部は、前記リング状壁部に形成された切欠き又は孔である。 (4) In the configuration of (3) above, the outflow portion is a notch or a hole formed in the ring-shaped wall portion.

（５）上記（３）又は（４）の構成において、前記仕切り部は、前記流出部が前記接続流路に対応する位置に位置させる位置決め部を備えている。 (5) In the configuration of (3) or (4) above, the partition portion includes a positioning portion for positioning the outflow portion at a position corresponding to the connection flow path.

（６）上記（１）から（５）のいずれか１つの構成において、前記本体部は、前記液体供給口の周囲を囲み、前記液体供給口と前記接続流路を繋げる切欠部を有する内壁部と、前記内壁部の外周部とで前記接続流路を形成する内周部を有する外壁部と、周方向の一部に設けられ、前記内壁部と前記外壁部の間の前記接続流路としない部分を埋める閉鎖壁部と、を備え、前記ダイアフラムは、円形の平板状であり、前記閉鎖壁部の一方側の端面は、前記液体供給口が全開となるときに、前記ダイアフラムが当接する前記内壁部側に向かって他方側に近づく傾斜面に形成されている。 (6) In any one of the above (1) to (5), the main body portion has an inner wall portion that surrounds the liquid supply port and has a notch that connects the liquid supply port and the connection flow path. An outer wall portion having an inner peripheral portion forming the connecting flow path with the outer peripheral portion of the inner wall portion, and the connecting flow path provided in a part in the circumferential direction between the inner wall portion and the outer wall portion. The diaphragm is in the shape of a circular flat plate, and the end face on one side of the closed wall portion is in contact with the diaphragm when the liquid supply port is fully opened. It is formed on an inclined surface that approaches the other side toward the inner wall portion side.

（７）上記（１）から（６）のいずれか１つの構成において、前記液体供給口は、前記本体部の中央の位置に設けられている。 (7) In any one of the above (1) to (6), the liquid supply port is provided at a central position of the main body.

本発明によれば、塗料等の液体の流量を制御する流量制御弁において、短時間で効率よく、少ない洗浄液で洗浄することができる流量制御弁を提供することができる。 According to the present invention, in a flow rate control valve that controls the flow rate of a liquid such as a paint, it is possible to provide a flow rate control valve that can efficiently wash with a small amount of cleaning liquid in a short time.

本発明に係る第１実施形態の流量制御弁を一方側から見た平面図である。It is a top view which looked at the flow rate control valve of 1st Embodiment which concerns on this invention from one side. 図１のＡ−Ａ線断面図である。FIG. 1 is a cross-sectional view taken along the line AA of FIG. 本発明に係る第１実施形態の本体部の一方側を見た斜視図である。It is a perspective view which looked at one side of the main body part of 1st Embodiment which concerns on this invention. 本発明に係る第１実施形態の流量制御弁の一部分解断面図である。It is a partially disassembled sectional view of the flow rate control valve of the 1st Embodiment which concerns on this invention. 本発明に係る第１実施形態の接続流路の変形例を示す図である。It is a figure which shows the modification of the connection flow path of 1st Embodiment which concerns on this invention. 本発明に係る第１実施形態のダイアフラムの変形例を示す図である。It is a figure which shows the modification of the diaphragm of 1st Embodiment which concerns on this invention. 本発明に係る第２実施形態を説明するための図であり、（ａ）は主に本体部を中心として示した断面図であり、（ｂ）は仕切り部を示す斜視図である。It is a figure for demonstrating the 2nd Embodiment which concerns on this invention, (a) is the sectional view which showed mainly to the main body part, (b) is the perspective view which shows the partition part. 本発明に係る第２実施形態の仕切り部の変形例を示す斜視図である。It is a perspective view which shows the modification of the partition part of the 2nd Embodiment which concerns on this invention. 図８に示す変形例の仕切り部に対応した本体部の一方側を見た図である。It is a figure which looked at one side of the main body part corresponding to the partition part of the modification shown in FIG. 本発明に係る実施形態の本体部の液体供給口を異なる位置に設けた変形例を示す本体部の一方側を見た図である。It is a figure which looked at one side of the main body part which shows the modification which provided the liquid supply port of the main body part of the embodiment which concerns on this invention at different positions.

以下、添付図面を参照して、本発明を実施するための形態（以下、実施形態）について詳細に説明する。
なお、実施形態の説明の全体を通して同じ要素には同じ番号を付している。 Hereinafter, embodiments for carrying out the present invention (hereinafter, embodiments) will be described in detail with reference to the accompanying drawings.
The same elements are numbered the same throughout the description of the embodiments.

（第１実施形態）
図１は本発明に係る第１実施形態の流量制御弁１０を一方側から見た平面図であり、図２は図１のＡ−Ａ線断面図である。
また、図３は本発明に係る第１実施形態の本体部２０の一方側を見た斜視図である。 (First Embodiment)
FIG. 1 is a plan view of the flow control valve 10 of the first embodiment according to the present invention as viewed from one side, and FIG. 2 is a sectional view taken along line AA of FIG.
Further, FIG. 3 is a perspective view of one side of the main body 20 of the first embodiment according to the present invention.

図２に示すように、流量制御弁１０は、他方側（図下側）から一方側（図上側）に連通する液体供給口２１を有する本体部２０と、一方側（図上側）の本体部２０上に配置された円形の平板状のダイアフラム３０と、ダイアフラム３０に取り付けられ、ダイアフラム３０の駆動によって、液体供給口２１の開度を制御する弁体４０と、を備えている。 As shown in FIG. 2, the flow control valve 10 has a main body portion 20 having a liquid supply port 21 communicating from the other side (lower side in the figure) to one side (upper side in the drawing) and a main body portion on one side (upper side in the drawing). A circular flat plate-shaped diaphragm 30 arranged on the 20 and a valve body 40 attached to the diaphragm 30 and controlling the opening degree of the liquid supply port 21 by driving the diaphragm 30 are provided.

また、流量制御弁１０は、一方側（図上側）に配置され、ダイアフラム３０を本体部２０とで挟持するとともに、ダイアフラム３０との間に空間５１を形成する蓋部５０と、蓋部５０に設けられ、ダイアフラム３０を駆動させる気体を空間５１に供給する気体供給部５２と、を備えている。 Further, the flow rate control valve 10 is arranged on one side (upper side of the drawing), and the diaphragm 30 is sandwiched between the main body portion 20 and the lid portion 50 and the lid portion 50 forming a space 51 between the diaphragm 30 and the lid portion 50. It is provided with a gas supply unit 52 that supplies the gas that drives the diaphragm 30 to the space 51.

なお、蓋部５０には、空間５１に連通する貫通孔５３が形成されており、その貫通孔５３の一方側（図上側）の内周面には、螺合溝が形成されている。
そして、気体供給部５２の他方側（図下側）の外周面には、貫通孔５３の螺合溝に螺合する螺合溝が形成されており、気体供給部５２の一方側（図上側）には、図示しない気体供給配管が接続される。 A through hole 53 communicating with the space 51 is formed in the lid portion 50, and a screw groove is formed on the inner peripheral surface of one side (upper side of the drawing) of the through hole 53.
A screw groove that is screwed into the screw groove of the through hole 53 is formed on the outer peripheral surface of the other side (lower side of the drawing) of the gas supply unit 52, and one side of the gas supply unit 52 (upper side of the drawing). ) Is connected to a gas supply pipe (not shown).

さらに、流量制御弁１０は、他方側（図下側）に配置され、本体部２０の液体供給口２１に対応した貫通孔６１を有する液体供給配管を取り付ける配管取付部６０を備えている。 Further, the flow rate control valve 10 is arranged on the other side (lower side in the drawing), and includes a pipe mounting portion 60 for attaching a liquid supply pipe having a through hole 61 corresponding to the liquid supply port 21 of the main body portion 20.

なお、図２に示すように、配管取付部６０の貫通孔６１の他方側（図下側）の内周面には、螺合溝が形成されている。
そして、その貫通孔６１に形成された螺合溝に螺合する螺合溝が外周面に形成された配管接続部６５を螺合させるようにして、配管接続部６５に端部が接続された液体供給配管（図示せず）が取り付けられるようになっている。 As shown in FIG. 2, a screw groove is formed on the inner peripheral surface of the other side (lower side in the drawing) of the through hole 61 of the pipe mounting portion 60.
Then, the end portion was connected to the pipe connection portion 65 so that the screw groove screwed into the screw groove formed in the through hole 61 screwed the pipe connection portion 65 formed on the outer peripheral surface. A liquid supply pipe (not shown) can be attached.

以下、具体的な流量制御弁１０の組み立て作業を説明しながら、より詳細な構成について説明する。
なお、以下で説明する組み立て作業は一例であって、組み立てが可能である限り、異なる手順であってもよい。
図４は本発明に係る第１実施形態の流量制御弁１０の一部分解断面図である。 Hereinafter, a more detailed configuration will be described while explaining the specific assembly work of the flow control valve 10.
The assembly work described below is an example, and may be different procedures as long as the assembly is possible.
FIG. 4 is a partially exploded cross-sectional view of the flow control valve 10 of the first embodiment according to the present invention.

図４に示すように、本体部２０の他方側（図下側）の端面には、中央側に形成された一方側（図上側）に凹んだ段差面２２が形成されている。
この段差面２２の中央には、他方側（図下側）から一方側（図上側）に連通する液体供給口２１が形成されており、その液体供給口２１の他方側（図下側）の端部には、液体供給口２１の周囲をリング状に拡径した段部２１ａが形成されている。 As shown in FIG. 4, an end surface on the other side (lower side in the drawing) of the main body 20 is formed with a stepped surface 22 formed on the center side and recessed on the other side (upper side in the drawing).
At the center of the stepped surface 22, a liquid supply port 21 communicating from the other side (lower side in the figure) to one side (upper side in the figure) is formed, and the other side (lower side in the figure) of the liquid supply port 21 is formed. At the end, a step portion 21a having a ring-shaped diameter expansion around the liquid supply port 21 is formed.

そして、その段部２１ａには、弁体４０の弁頭４１を受ける樹脂材料で形成された受けリング２３がはめ込まれている。
この受けリング２３は、弁頭４１との密着力を向上し、液体の流れを停止するときの液体供給口２１の閉塞度を向上する役目を果たす。 A receiving ring 23 made of a resin material that receives the valve head 41 of the valve body 40 is fitted in the step portion 21a.
The receiving ring 23 serves to improve the adhesion with the valve head 41 and to improve the degree of closure of the liquid supply port 21 when the flow of the liquid is stopped.

ただし、受けリング２３は、必須の構成ではなく、弁頭４１が、直接、液体供給口２１の他方側（図下側）の開口縁部に当接することで液体の流れを停止するようにしてもよい。 However, the receiving ring 23 is not indispensable, and the valve head 41 directly contacts the opening edge on the other side (lower side in the drawing) of the liquid supply port 21 to stop the flow of the liquid. May be good.

また、段差面２２には、段部２１ａよりも外側に形成された段部２１ａの周囲を囲むリング溝２４が形成されており、そのリング溝２４には、本体部２０と配管取付部６０との間をシールするシールリング２５（本例ではＯリング）がはめ込まれている。 Further, a ring groove 24 surrounding the periphery of the step portion 21a formed outside the step portion 21a is formed on the step surface 22, and the main body portion 20 and the pipe mounting portion 60 are formed in the ring groove 24. A seal ring 25 (O-ring in this example) is fitted to seal the space between them.

ただし、このシールリング２５も必須の構成ではなく、配管取付部６０の一方側（図上側）の端面６２と本体部２０の他方側（図下側）の端面の段差面２２との面接触によるシール構造としてもよい。
なお、本実施形態では、段差面２２の直径よりも、配管取付部６０の一方側（図上側）の端面６２の直径を小さくして、段差面２２内に端面６２が収まるようにして、端面６２がシールリング２５を押圧し、シールするようになっている。 However, this seal ring 25 is not an indispensable configuration, and is due to surface contact between the end surface 62 on one side (upper side of the drawing) of the pipe mounting portion 60 and the stepped surface 22 of the end surface of the other side (lower side of the drawing) of the main body portion 20. It may be a seal structure.
In the present embodiment, the diameter of the end surface 62 on one side (upper side of the drawing) of the pipe mounting portion 60 is made smaller than the diameter of the step surface 22 so that the end surface 62 fits within the step surface 22. 62 presses the seal ring 25 to seal it.

一方、弁体４０は、曲面が一方側（図上側）に向くように他方側（図下側）に設けられた半球状の弁頭４１と、弁頭４１の中央から一方側（図上側）に延在する弁棒４２と、弁棒４２の一方側（図上側）の端部に段差面を形成するように、弁棒４２の一方側（図上側）の端部の外径よりも小さい外径に形成され、弁棒４２の一方側（図上側）の端面の中央から、さらに、一方側（図上側）に延在する円柱状の固定部４３と、を備えている。 On the other hand, the valve body 40 has a hemispherical valve head 41 provided on the other side (lower side in the figure) so that the curved surface faces one side (upper side in the figure) and one side (upper side in the figure) from the center of the valve head 41. It is smaller than the outer diameter of the end portion of one side (upper side of the drawing) of the valve rod 42 so as to form a stepped surface at the end portion of the valve rod 42 extending to the above and one side (upper side of the drawing) of the valve rod 42. It is provided with a columnar fixing portion 43 formed to an outer diameter and extending from the center of the end surface on one side (upper side of the drawing) of the valve rod 42 to one side (upper side of the drawing).

この円柱状の固定部４３の外周には、後述するナット３５の内周面の螺合溝に螺合するための螺合溝が形成されており、ナット３５を螺合させることで、これから説明するように、ダイアフラム３０に弁体４０が取り付けられる。 A screw groove for screwing into the screw groove on the inner peripheral surface of the nut 35, which will be described later, is formed on the outer periphery of the columnar fixing portion 43, and will be described below by screwing the nut 35. The valve body 40 is attached to the diaphragm 30 so as to do so.

ダイアフラム３０は、本実施形態では、外径がほぼ等しい円盤状の２枚薄板材を一体化したものを用いている。
具体的には、ダイアフラム３０は、一方側（図上側）に位置するゴム等の弾性部材からなる第１円板部材３１と、他方側（図下側）に位置する耐摩耗性等に優れた樹脂材料で形成された第２円板部材３２と、を一体化したものになっており、中央に弁体４０の固定部４３を通す、固定部４３の外径にほぼ等しい内径を有する貫通孔が形成されている。 In the present embodiment, the diaphragm 30 is a combination of two disc-shaped thin plate members having substantially the same outer diameter.
Specifically, the diaphragm 30 is excellent in wear resistance and the like located on one side (upper side of the figure) of the first disk member 31 made of an elastic member such as rubber and on the other side (lower side of the figure). A through hole having an inner diameter substantially equal to the outer diameter of the fixing portion 43 through which the fixing portion 43 of the valve body 40 is passed in the center, which is integrated with the second disk member 32 made of a resin material. Is formed.

また、ダイアフラム３０は、図４に示すように、周方向に均等間隔で形成された図１に示す４つのボルト７０を通すための４つの貫通孔３０ａを備えている。
なお、ダイアフラム３０に対する弁体４０の固定に際して、これから説明するように、ダイアフラム３０を保護する目的で設けられた２つのリング状の保護部材で挟持するようにして、弁体４０とダイアフラム３０との固定が行われる。 Further, as shown in FIG. 4, the diaphragm 30 is provided with four through holes 30a for passing the four bolts 70 shown in FIG. 1 formed at equal intervals in the circumferential direction.
When fixing the valve body 40 to the diaphragm 30, as will be described below, the valve body 40 and the diaphragm 30 are sandwiched between two ring-shaped protective members provided for the purpose of protecting the diaphragm 30. Fixing is done.

２つのリング状の保護部材としては、樹脂や金属で形成されたものでよく、具体的には、２つのリング状の保護部材は、中央に弁体４０の固定部４３を通す、固定部４３の外径にほぼ等しい内径を有する貫通孔が形成され、ダイアフラム３０の他方側（図下側）に配置される第１保護部材３３と、同様に、中央に弁体４０の固定部４３を通す、固定部４３の外径にほぼ等しい内径を有する貫通孔が形成され、ダイアフラム３０の一方側（図上側）に配置される第２保護部材３４からなる。 The two ring-shaped protective members may be made of resin or metal. Specifically, the two ring-shaped protective members pass the fixing portion 43 of the valve body 40 through the center of the fixing portion 43. A through hole having an inner diameter substantially equal to the outer diameter of the valve body 40 is formed, and the fixing portion 43 of the valve body 40 is passed through the center in the same manner as the first protective member 33 arranged on the other side (lower side in the drawing) of the diaphragm 30. A through hole having an inner diameter substantially equal to the outer diameter of the fixing portion 43 is formed, and is composed of a second protective member 34 arranged on one side (upper side of the drawing) of the diaphragm 30.

そして、具体的な組み立て手順の一例としては、本体部２０の液体供給口２１の他方側（図下側）の段部２１ａに受けリング２３と、リング溝２４にシールリング２５を嵌め込んだ状態の本体部２０に対して、まず、本体部２０の液体供給口２１の他方側（図下側）から弁体４０の固定部４３を液体供給口２１の一方側（図上側）に導出するように弁体４０を配置する。
なお、シールリング２５をリング溝２４に嵌め込む作業は、本体部２０に対して、配管取付部６０を取り付ける作業の直前に行うようにしてもよい。 Then, as an example of a specific assembly procedure, a receiving ring 23 and a seal ring 25 are fitted in the step portion 21a on the other side (lower side in the drawing) of the liquid supply port 21 of the main body portion 20 and the ring groove 24. First, the fixing portion 43 of the valve body 40 is led out from the other side (lower side in the figure) of the liquid supply port 21 of the main body portion 20 to one side (upper side in the figure) of the liquid supply port 21. The valve body 40 is arranged in.
The work of fitting the seal ring 25 into the ring groove 24 may be performed immediately before the work of attaching the pipe mounting portion 60 to the main body portion 20.

続いて、第１保護部材３３の貫通孔に固定部４３を挿入するように第１保護部材３３を弁体４０に装着する。
上述したように、弁体４０の弁棒４２の一方側（図上側）の端面は、固定部４３よりも外径が大きく、第１保護部材３３の他方側（図下側）の端面を受ける段差面を有するものとなっているため、その段差面によって第１保護部材３３が受けられることになる。 Subsequently, the first protective member 33 is attached to the valve body 40 so as to insert the fixing portion 43 into the through hole of the first protective member 33.
As described above, the end surface of the valve rod 42 of the valve body 40 on one side (upper side in the drawing) has an outer diameter larger than that of the fixing portion 43 and receives the end surface on the other side (lower side in the drawing) of the first protective member 33. Since it has a stepped surface, the first protective member 33 can be received by the stepped surface.

さらに、ダイアフラム３０の中央の貫通孔に固定部４３を挿入するようにして、ダイアフラム３０の他方側（図下側）の面を第１保護部材３３の一方側（図上側）の面に当接させるように、ダイアフラム３０を弁体４０に装着する。 Further, the fixing portion 43 is inserted into the through hole at the center of the diaphragm 30 so that the other side (lower side in the drawing) surface of the diaphragm 30 comes into contact with the one side (upper side in the drawing) surface of the first protective member 33. The diaphragm 30 is attached to the valve body 40 so as to be allowed to do so.

そして、第２保護部材３４の貫通孔に固定部４３を挿入するようにして、第２保護部材３４の他方側（図下側）の面をダイアフラム３０の一方側（図上側）の面に当接させるように、第２保護部材３４を弁体４０に装着し、固定部４３の一方側（図上側）の端部にナット３５を螺合させることで、第１保護部材３３と第２保護部材３４でダイアフラム３０が挟持されるようにしてダイアフラム３０に弁体４０を固定する。 Then, the fixing portion 43 is inserted into the through hole of the second protective member 34 so that the surface of the other side (lower side in the drawing) of the second protective member 34 is in contact with the surface of one side (upper side in the drawing) of the diaphragm 30. The second protective member 34 is attached to the valve body 40 so as to be in contact with the valve body 40, and the nut 35 is screwed into one end of the fixing portion 43 (upper side in the drawing) to protect the first protective member 33 and the second protective member 33. The valve body 40 is fixed to the diaphragm 30 so that the diaphragm 30 is sandwiched between the members 34.

なお、弁体４０の弁頭４１の他方側（図下側）の端面には、マイナスドライバの先端を係合する一文字の溝、又は、プラスドライバの先端を係合する十文字の溝が形成されている。
したがって、ナット３５を固定部４３に螺合するときには、弁頭４１の他方側（図下側）の端面にマイナスドライバ又はプラスドライバを溝に係合して弁体４０がナット３５の螺合時の回転によって回転しないようにして作業を行うようにすればよい。 On the other end surface (lower side in the drawing) of the valve head 41 of the valve body 40, a one-character groove for engaging the tip of a flat-blade screwdriver or a cross-shaped groove for engaging the tip of a Phillips screwdriver is formed. ing.
Therefore, when the nut 35 is screwed into the fixing portion 43, a flat-blade screwdriver or a Phillips screwdriver is engaged with the groove on the other end surface (lower side in the drawing) of the valve head 41, and the valve body 40 is screwed into the nut 35. It suffices to work so that it does not rotate due to the rotation of.

一方、第１保護部材３３と第２保護部材３４は、ナット３５を螺合させたときの締め付け力（締め付け応力）がダイアフラム３０に局所的に加わり、ダイアフラム３０が損傷することを抑制する役割を果たす部材である。
このため、弁体４０の弁棒４２の一方側（図上側）の端面やナット３５の端面の直径よりも大きいことが好ましく、例えば、第１保護部材３３及び第２保護部材３４の直径は、弁体４０の弁棒４２の一方側（図上側）の端面やナット３５の端面のいずれか一方の直径に対して２倍以上の直径を有するのがよい。 On the other hand, the first protective member 33 and the second protective member 34 play a role of suppressing damage to the diaphragm 30 by locally applying a tightening force (tightening stress) when the nut 35 is screwed to the diaphragm 30. It is a member to fulfill.
Therefore, it is preferable that the diameter is larger than the diameter of one end surface (upper side of the drawing) of the valve rod 42 of the valve body 40 or the end surface of the nut 35. For example, the diameters of the first protective member 33 and the second protective member 34 are set. It is preferable that the diameter of the valve body 40 is at least twice the diameter of either one of the end face of the valve rod 42 (upper side of the drawing) and the end face of the nut 35.

また、弁体４０の弁棒４２の一方側（図上側）の端面やナット３５の端面が十分に大きく、ダイアフラム３０に対して局所的な強い締め付け力（締め付け応力）が加わることが回避できる場合には、第１保護部材３３及び第２保護部材３４を省略することも可能である。 Further, when the end face of one side (upper side of the drawing) of the valve rod 42 of the valve body 40 and the end face of the nut 35 are sufficiently large, it is possible to avoid applying a strong local tightening force (tightening stress) to the diaphragm 30. It is also possible to omit the first protective member 33 and the second protective member 34.

次に、４つのボルト７０を螺合させるために本体部２０に形成されている４つの螺合孔２６に対してダイアフラム３０に形成されている４つの貫通孔３０ａの位置が合うように、ダイアフラム３０の位置合わせを行う。 Next, the diaphragm so that the four through holes 30a formed in the diaphragm 30 are aligned with the four screw holes 26 formed in the main body 20 for screwing the four bolts 70. Align 30.

そして、さらに、ボルト７０に対応して、蓋部５０に形成された４つの貫通孔５４が本体部２０に形成されている４つの螺合孔２６の位置に合うように、蓋部５０を本体部２０の一方側（図上側）に配置して、蓋部５０の貫通孔５４、ダイアフラム３０の貫通孔３０ａを通じて本体部２０の螺合孔２６にボルト７０を螺合させることで、本体部２０に対して、蓋部５０がダイアフラム３０を本体部２０とで挟持するように固定する。 Further, the lid portion 50 is further arranged so that the four through holes 54 formed in the lid portion 50 are aligned with the positions of the four screw holes 26 formed in the main body portion 20 corresponding to the bolt 70. The main body 20 is arranged on one side (upper side of the drawing) of the main body 20 and the bolt 70 is screwed into the screw hole 26 of the main body 20 through the through hole 54 of the lid 50 and the through hole 30a of the diaphragm 30. On the other hand, the lid portion 50 fixes the diaphragm 30 so as to be sandwiched between the main body portion 20.

さらに、本体部２０の段差面２２のリング溝２４よりも外側に形成された複数のボルト７１を螺合させる螺合孔２７に対して、配管取付部６０に形成されているボルト７１に対応した貫通孔６３の位置を合わせるように、配管取付部６０を本体部２０の他方側（図下側）に配置して、配管取付部６０の貫通孔６３を通じてボルト７１を本体部２０の螺合孔２７に螺合させて、配管取付部６０を本体部２０に固定すると、図２に示した流量制御弁１０の状態となる。 Further, the bolts 71 formed in the pipe mounting portion 60 correspond to the screw holes 27 for screwing the plurality of bolts 71 formed outside the ring groove 24 of the stepped surface 22 of the main body portion 20. The pipe mounting portion 60 is arranged on the other side (lower side in the drawing) of the main body portion 20 so as to align the position of the through hole 63, and the bolt 71 is screwed into the main body portion 20 through the through hole 63 of the pipe mounting portion 60. When the pipe mounting portion 60 is fixed to the main body portion 20 by being screwed into 27, the flow control valve 10 shown in FIG. 2 is in the state.

このようにして、組み立てられた流量制御弁１０は、図２に示す空間５１に所定の圧力の気体を気体供給部５２から供給すると、ダイアフラム３０が他方側（図下側）に弾性変形し、そのダイアフラム３０の駆動によって、液体供給口２１を閉塞していた弁体４０も他方側（図下側）に移動し、液体供給口２１が開いた状態となる。 When the flow control valve 10 assembled in this way supplies a gas having a predetermined pressure to the space 51 shown in FIG. 2 from the gas supply unit 52, the diaphragm 30 elastically deforms to the other side (lower side in the figure). By driving the diaphragm 30, the valve body 40 that has blocked the liquid supply port 21 also moves to the other side (lower side in the drawing), and the liquid supply port 21 is opened.

そして、液体供給口２１を通じて本体部２０の一方側（図上側）に供給された液体がダイアフラム３０を一方側（図上側）に押圧し、丁度、その液体の押圧力と空間５１の内圧とが釣り合った状態でダイアフラム３０が停止状態（ただし、圧力バランスを得るために微小にダイアフラム３０が振動している場合がある）となり、一定流量の液体が、図３に示す本体部２０の液体供給口２１と液体流出口２８の間を接続する１つだけの溝状の接続流路２９を通って、液体流出口２８に向かって流れ、本体部２０外に液体を流出させる液体流出口２８から流出する。 Then, the liquid supplied to one side (upper side of the figure) of the main body 20 through the liquid supply port 21 presses the diaphragm 30 to one side (upper side of the figure), and the pressing pressure of the liquid and the internal pressure of the space 51 are exactly the same. In a balanced state, the diaphragm 30 is stopped (however, the diaphragm 30 may be slightly vibrating in order to obtain pressure balance), and a constant flow rate of liquid is discharged from the liquid supply port of the main body 20 shown in FIG. It flows toward the liquid outlet 28 through only one groove-shaped connecting flow path 29 that connects between the 21 and the liquid outlet 28, and flows out from the liquid outlet 28 that causes the liquid to flow out of the main body 20. To do.

なお、液体流出口２８の本体部２０の外周側の内壁面には、螺合溝が形成されており、その螺合溝には、図示しない液体流出路が接続されている液体流出路接続部材７３（図１参照）が螺合固定されている。
したがって、液体流出路を通じて、塗料等の液体が、所定の設備（例えば、塗装機等）に供給されることになる。 A screw groove is formed on the inner wall surface of the main body 20 of the liquid outlet 28 on the outer peripheral side, and a liquid outflow path (not shown) is connected to the screw groove. 73 (see FIG. 1) is screwed and fixed.
Therefore, a liquid such as paint is supplied to a predetermined facility (for example, a painting machine) through the liquid outflow path.

ここで、図３を見るとわかるように、本体部２０は、本体部２０の中央に開口する液体供給口２１の周囲を囲み、液体供給口２１と接続流路２９を繋げる切欠部２０ＡＡを有する内壁部２０Ａと、内壁部２０Ａの外周部２０ＡＢとで接続流路２９を形成する内周部２０ＢＡを有する外壁部２０Ｂと、周方向の一部に設けられ、内壁部２０Ａと外壁部２０Ｂの間の接続流路２９としない部分を埋める閉鎖壁部２０Ｃと、を備え、液体供給口２１と液体流出口２８の間を円弧状に接続する１つだけの溝状の接続流路２９によって、液体供給口２１と液体流出口２８の間が接続されている。 Here, as can be seen from FIG. 3, the main body 20 has a notch 20AA that surrounds the liquid supply port 21 that opens in the center of the main body 20 and connects the liquid supply port 21 and the connection flow path 29. An outer wall portion 20B having an inner peripheral portion 20BA forming a connection flow path 29 between the inner wall portion 20A and the outer peripheral portion 20AB of the inner wall portion 20A, and an outer wall portion 20B provided in a part in the circumferential direction, between the inner wall portion 20A and the outer wall portion 20B. The liquid is provided by a closed wall portion 20C that fills a portion that is not connected to the connecting flow path 29, and is provided by only one groove-shaped connecting flow path 29 that connects the liquid supply port 21 and the liquid outlet 28 in an arc shape. The supply port 21 and the liquid outlet 28 are connected.

このため、液体供給口２１から供給された液体のうち、閉鎖壁部２０Ｃの一方側（図上側）の端面とダイアフラム３０の他方側（図下側）の面の間の隙間及び内壁部２０Ａの一方側（図上側）の端面と第１保護部材３３の他方側（図下側）の端面の間の隙間を経由して液体流出口２８に向かう小流量の液体を除く、ほとんどの液体が接続流路２９を流れて液体流出口２８に向かうことになる。 Therefore, of the liquid supplied from the liquid supply port 21, the gap between the end surface of one side (upper side of the drawing) of the closed wall portion 20C and the other side (lower side of the drawing) of the diaphragm 30 and the inner wall portion 20A. Most liquids are connected except for a small flow rate of liquid toward the liquid outlet 28 via the gap between the end face on one side (upper side in the figure) and the end face on the other side (lower side in the figure) of the first protective member 33. It flows through the flow path 29 and heads for the liquid outlet 28.

したがって、分岐路なく、供給されたほとんどの液体が、液体流出口２８に向かって勢いよく接続流路２９内を流れるため、洗浄液を供給して接続流路２９を洗浄するときに、接続流路２９の壁面に付着した塗料等の液体を短時間で洗い流すことが可能である。 Therefore, most of the supplied liquid flows vigorously toward the liquid outlet 28 in the connecting flow path 29 without a branch path, and therefore, when the cleaning liquid is supplied to clean the connecting flow path 29, the connecting flow path 29 is used. It is possible to wash away the liquid such as paint adhering to the wall surface of 29 in a short time.

しかも、接続流路２９が円弧状であるため、接続流路２９内を流れる洗浄液は、直線的に流れる場合のように流路抵抗が低い中央側（壁面から離れた位置）を優位に流れることができず、接続流路２９の壁面に衝突して流れ方向を変えるように流れるため、洗浄液が接続流路２９の壁面に付着した塗料等の液体を削ぎ取るようにして、効率よく接続流路２９の壁面が洗浄される。 Moreover, since the connecting flow path 29 has an arc shape, the cleaning liquid flowing in the connecting flow path 29 predominantly flows on the central side (position away from the wall surface) where the flow path resistance is low as in the case of linear flow. The cleaning liquid collides with the wall surface of the connection flow path 29 and flows so as to change the flow direction. Therefore, the cleaning liquid scrapes off the liquid such as paint adhering to the wall surface of the connection flow path 29 to efficiently perform the connection flow path. The walls of 29 are cleaned.

次に、具体的な洗浄時の手順の一例を説明しながら、さらに、本実施形態の構成等について詳細に説明すると、図３に示すように、閉鎖壁部２０Ｃの一方側（図上側）の端面は、内壁部２０Ａ側に向かって他方側（図下側）に近づく傾斜面に形成されている。
また、閉鎖壁部２０Ｃと内壁部２０Ａの間には段差があり、内壁部２０Ａの一方側（図上側）の端面は、閉鎖壁部２０Ｃよりも一段低い位置（他方側（図下側）に低い位置）に位置するようになっている。 Next, while explaining an example of a specific cleaning procedure, the configuration of the present embodiment will be described in detail. As shown in FIG. 3, one side (upper side of the drawing) of the closed wall portion 20C The end surface is formed on an inclined surface that approaches the other side (lower side in the drawing) toward the inner wall portion 20A side.
Further, there is a step between the closed wall portion 20C and the inner wall portion 20A, and the end face on one side (upper side of the drawing) of the inner wall portion 20A is at a position one step lower than the closed wall portion 20C (on the other side (lower side in the drawing)). It is designed to be located in the lower position).

これは、ダイアフラム３０が駆動するときの駆動代を得るための構成であり、閉鎖壁部２０Ｃの一方側（図上側）の端面の傾斜は、図２に示した状態から空間５１に気体が供給され、ダイアフラム３０が他方側（図下側）に弾性変形し、液体供給口２１が全開になるときには、ダイアフラム３０が当接（又はほとんど隙間なく近接）するような傾斜に合わせている。 This is a configuration for obtaining a driving allowance when the diaphragm 30 is driven, and the inclination of the end face on one side (upper side of the drawing) of the closed wall portion 20C is such that gas is supplied to the space 51 from the state shown in FIG. When the diaphragm 30 is elastically deformed to the other side (lower side in the drawing) and the liquid supply port 21 is fully opened, the diaphragm 30 is adjusted to an inclination so as to abut (or approach with almost no gap).

また、図３に示した内壁部２０Ａの一方側（図上側）の端面の高さは、図２に示した状態から空間５１に気体が供給され、ダイアフラム３０が他方側（図下側）に弾性変形し、液体供給口２１が全開になるときに、第１保護部材３３の他方側（図下側）の端面が当接（又はほとんど隙間なく近接）する位置となるようになっている。 Further, the height of the end surface of the inner wall portion 20A shown in FIG. 3 on one side (upper side in the drawing) is such that gas is supplied to the space 51 from the state shown in FIG. 2 and the diaphragm 30 is moved to the other side (lower side in the drawing). When the liquid supply port 21 is elastically deformed and the liquid supply port 21 is fully opened, the end face of the other side (lower side in the drawing) of the first protective member 33 comes into contact (or is close to each other with almost no gap).

したがって、洗浄液で洗浄を行うときには、洗浄液を供給する状態として、まず、液体供給口２１が全開と全閉を幾度か繰り返すようにダイアフラム３０を駆動させる。
そうすると、ダイアフラム３０及び第１保護部材３３が閉鎖壁部２０Ｃ及び内壁部２０Ａの一方側（図上側）の端面に当接（又はほとんど隙間なく近接）及び離間を繰り返すことになり、この閉鎖壁部２０Ｃ及び内壁部２０Ａの一方側（図上側）の端面上に残留する塗料等の液体が速やかに洗浄される。 Therefore, when cleaning with the cleaning liquid, the diaphragm 30 is first driven so that the liquid supply port 21 repeats fully opening and closing several times in a state of supplying the cleaning liquid.
Then, the diaphragm 30 and the first protective member 33 repeatedly abut (or approach) and separate from the end faces of one side (upper side of the drawing) of the closed wall portion 20C and the inner wall portion 20A, and the closed wall portion Liquids such as paint remaining on the end faces of 20C and one side (upper side of the drawing) of the inner wall portion 20A are quickly washed.

そして、その後、液体供給口２１を全開とするように、ダイアフラム３０を駆動させ、ダイアフラム３０及び第１保護部材３３が閉鎖壁部２０Ｃ及び内壁部２０Ａの一方側（図上側）の端面に当接（又はほとんど隙間なく近接）する状態として、洗浄液が閉鎖壁部２０Ｃ及び内壁部２０Ａの一方側（図上側）の端面上をショートカットして液体流出口２８に向かわないようにする。 Then, after that, the diaphragm 30 is driven so as to fully open the liquid supply port 21, and the diaphragm 30 and the first protective member 33 come into contact with the end faces of one side (upper side of the drawing) of the closed wall portion 20C and the inner wall portion 20A. In a state of (or being close to each other with almost no gap), the cleaning liquid is short-cut on the end face of one side (upper side of the drawing) of the closed wall portion 20C and the inner wall portion 20A so as not to go toward the liquid outlet 28.

そうすると、供給された洗浄液は無駄なく、接続流路２９を通じて液体流出口２８に向かうことになり、効率よく、接続流路２９の壁面が洗浄されることになる。
しかも、上述したように、接続流路２９を円弧状として、接続流路２９の洗浄効率が高くされていることとも相まって、短時間で洗浄を行うことができ、洗浄液の使用量を大幅に低減することができる。 Then, the supplied cleaning liquid will be directed to the liquid outlet 28 through the connection flow path 29 without waste, and the wall surface of the connection flow path 29 will be efficiently cleaned.
Moreover, as described above, the connection flow path 29 has an arcuate shape, and the cleaning efficiency of the connection flow path 29 is improved, so that cleaning can be performed in a short time, and the amount of cleaning liquid used is significantly reduced. can do.

以上、具体的な例示をもとに第１実施形態の流量制御弁１０について説明してきたが、本発明は、上記実施形態に限定されるものではない。
上記実施形態では、接続流路２９は、周方向にほぼ一周するような円弧状の溝として形成した場合について示したが、必ずしも、ほぼ一周するようなものでなくてもよい。 Although the flow control valve 10 of the first embodiment has been described above based on a specific example, the present invention is not limited to the above embodiment.
In the above embodiment, the connection flow path 29 is formed as an arcuate groove that substantially goes around in the circumferential direction, but it does not necessarily have to go around.

図５は接続流路２９の変形例を示す図であり、本体部２０の一方側を正面に見た平面図である。
なお、図５では、液体流出口２８の内側の位置を円で示し、その円から点線で本体部２０の側面に向けて貫通する液体流出口２８の状態を示すようにしており、図１に示す液体流出路接続部材７３については図示を省略している。 FIG. 5 is a view showing a modified example of the connection flow path 29, and is a plan view of one side of the main body 20 as viewed from the front.
In addition, in FIG. 5, the position inside the liquid outlet 28 is indicated by a circle, and the state of the liquid outlet 28 penetrating from the circle toward the side surface of the main body 20 is shown in FIG. The liquid outflow path connecting member 73 shown is not shown.

図５に示すように、接続流路２９は、周方向に約半周するような円弧状の溝（図５（ａ）参照）や周方向に約１／４周するような円弧状の溝（図５（ｂ）参照）であってもよく、図５（ｃ）に示すように、より短い長さの円弧状の溝であってもよい。 As shown in FIG. 5, the connection flow path 29 has an arcuate groove (see FIG. 5A) that makes a half circumference in the circumferential direction and an arcuate groove (see FIG. 5A) that makes about 1/4 circumference in the circumferential direction. (See FIG. 5 (b)), or as shown in FIG. 5 (c), it may be an arcuate groove having a shorter length.

さらに、上記実施形態では、ダイアフラム３０が円形の平板状のものとして、本体部２０にダイアフラム３０の駆動代に対応する構成を設けた場合（閉鎖壁部２０Ｃに傾斜面を形成し、閉鎖壁部２０Ｃと内壁部２０Ａの間に段差を設けた場合）を示したが、この関係は、逆であってもよい。 Further, in the above embodiment, when the diaphragm 30 has a circular flat plate shape and the main body 20 is provided with a configuration corresponding to the driving allowance of the diaphragm 30 (an inclined surface is formed on the closed wall portion 20C and the closed wall portion is formed). (When a step is provided between 20C and the inner wall portion 20A), but this relationship may be reversed.

つまり、図６に示すダイアフラム３０の変形例のように、ダイアフラム３０の形状を外周部から中央部に向かって一方側（図上側）に台形状のように立ち上がる形状として、ダイアフラム３０側に駆動代を持たせるようにしてもよい。 That is, as in the modified example of the diaphragm 30 shown in FIG. 6, the shape of the diaphragm 30 rises from the outer peripheral portion toward the central portion on one side (upper side of the drawing) like a trapezoid, and the drive allowance is on the diaphragm 30 side. It may be made to have.

（第２実施形態）
次に、図７を参照しながら、第２実施形態について説明する。
図７は第２実施形態を説明するための図であり、図７（ａ）は主に本体部２０を中心として示した断面図であり、図７（ｂ）は仕切り部３３ａを示す斜視図である。
なお、第２実施形態でも全体的な構成は第１実施形態と同様であり、以下では、第１実施形態と異なる点について主に説明し、同様である点については説明を省略する場合がある。 (Second Embodiment)
Next, the second embodiment will be described with reference to FIG. 7.
7A and 7B are views for explaining the second embodiment, FIG. 7A is a cross-sectional view mainly showing the main body portion 20, and FIG. 7B is a perspective view showing a partition portion 33a. Is.
It should be noted that the overall configuration of the second embodiment is the same as that of the first embodiment, and the points different from the first embodiment will be mainly described below, and the same points may be omitted. ..

第１実施形態でも少し述べたように、第１実施形態の構成では、液体供給口２１を全開の状態にしたときには、ダイアフラム３０及び第１保護部材３３が閉鎖壁部２０Ｃ及び内壁部２０Ａの一方側（図上側）の端面に当接（又はほとんど隙間なく近接）する状態となり、供給されるほとんどの液体が接続流路２９を流れて液体流出口２８に向かうことになる。 As described a little in the first embodiment, in the configuration of the first embodiment, when the liquid supply port 21 is fully opened, the diaphragm 30 and the first protective member 33 are one of the closed wall portion 20C and the inner wall portion 20A. It comes into contact with (or approaches with almost no gap) the end surface on the side (upper side of the drawing), and most of the supplied liquid flows through the connection flow path 29 and heads toward the liquid outlet 28.

一方で、液体供給口２１の開度が中間程度である場合、つまり、全閉と全開の間の開度となるような場合、ダイアフラム３０及び第１保護部材３３が閉鎖壁部２０Ｃ及び内壁部２０Ａの一方側（図上側）の端面に当接（又はほとんど隙間なく近接）する状態にならないため、いくらかの液体は、ダイアフラム３０と閉鎖壁部２０Ｃの一方側（図上側）の端面との間の隙間及び第１保護部材３３と内壁部２０Ａの一方側（図上側）の端面との間の隙間をショートカットして液体流出口２８に流れることになる。 On the other hand, when the opening degree of the liquid supply port 21 is about the middle, that is, when the opening degree is between fully closed and fully opened, the diaphragm 30 and the first protective member 33 are the closed wall portion 20C and the inner wall portion. Some liquid is between the diaphragm 30 and one side (upper side of the figure) of the closed wall 20C because it does not come into contact (or close to) the end face of one side (upper side of the figure) of 20A. The gap and the gap between the first protective member 33 and the end surface on one side (upper side of the drawing) of the inner wall portion 20A are short-cut to flow to the liquid outlet 28.

そこで、第２実施形態では、このショートカットする液体の量を低減するための構成を加えたものとしている。
具体的には、図７（ａ）に示すように、液体供給口２１の一方側（図上側）の開口を少し拡径した拡径開口２１ｂとして、その拡径開口２１ｂに仕切り部３３ａを位置させるようにしている。 Therefore, in the second embodiment, a configuration for reducing the amount of the liquid to be shortcut is added.
Specifically, as shown in FIG. 7A, the opening on one side (upper side of the drawing) of the liquid supply port 21 is slightly enlarged as a diameter-expanded opening 21b, and the partition 33a is positioned in the diameter-expanded opening 21b. I try to let you.

この仕切り部３３ａは、図７（ａ）及び図７（ｂ）に示すように、弁体４０の固定部４３を通す、固定部４３の外径とほぼ等しい内径の貫通孔が設けられた底部３３ａａと、その底部３３ａａの外周部から他方側（図下側）に延在するリング状壁部３３ａｂと、を備え、リング状壁部３３ａｂの一部には、他方側（図下側）から切り欠いた切欠きからなる流出部３３ａｃが形成されている。 As shown in FIGS. 7A and 7B, the partition 33a is a bottom portion provided with a through hole having an inner diameter substantially equal to the outer diameter of the fixing portion 43 through which the fixing portion 43 of the valve body 40 is passed. A ring-shaped wall portion 33ab extending from the outer peripheral portion of the bottom portion 33aa to the other side (lower side in the figure) is provided, and a part of the ring-shaped wall portion 33ab is provided from the other side (lower side in the figure). An outflow portion 33ac composed of the notched notch is formed.

なお、底部３３ａａは第１実施形態における第１保護部材３３としての役割を兼ねるものになっており、弁体４０をダイアフラム３０にナット３５で固定するときに、ダイアフラム３０に局所的な締め付け力（締め付け応力）が加わらないように、第２保護部材３４とでダイアフラム３０を挟持するものになっている。 The bottom portion 33aa also serves as the first protective member 33 in the first embodiment, and when the valve body 40 is fixed to the diaphragm 30 with the nut 35, a local tightening force (tightening force) is applied to the diaphragm 30. The diaphragm 30 is sandwiched between the second protective member 34 and the second protective member 34 so that the tightening stress) is not applied.

そして、仕切り部３３ａは、リング状壁部３３ａｂに形成された切欠きからなる流出部３３ａｃが液体供給口２１と接続流路２９との境目に向けて位置するように配置される。 Then, the partition portion 33a is arranged so that the outflow portion 33ac formed of the notch formed in the ring-shaped wall portion 33ab is located toward the boundary between the liquid supply port 21 and the connection flow path 29.

このため、液体供給口２１から供給される液体は、流出部３３ａｃを通じて接続流路２９へと流れ込む。
なお、流出部３３ａｃは、液体供給口２１から供給される液体がリング状壁部３３ａｂに邪魔されずに接続流路２９側に流れるようにするためのものであるため、切欠きからなるものに限定される必要はなく、例えば、流出部３３ａｃはリング状壁部３３ａｂを貫通する孔からなるものであってもよい。 Therefore, the liquid supplied from the liquid supply port 21 flows into the connection flow path 29 through the outflow portion 33ac.
Since the outflow portion 33ac is for allowing the liquid supplied from the liquid supply port 21 to flow to the connection flow path 29 side without being disturbed by the ring-shaped wall portion 33ab, the outflow portion 33ac is formed of a notch. It does not have to be limited, and for example, the outflow portion 33ac may consist of a hole penetrating the ring-shaped wall portion 33ab.

一方で、その流出部３３ａｃが設けられていないところでは、開度によらず、内壁部２０Ａの内周面とリング状壁部３３ａｂの外周面が高さ方向（弁体４０の動き方向）で重なりあってラビリンス構造を形成しているため、液体が上述したようにショートカットして液体流出口２８に向かうことが大幅に低減されるようになっている。 On the other hand, where the outflow portion 33ac is not provided, the inner peripheral surface of the inner wall portion 20A and the outer peripheral surface of the ring-shaped wall portion 33ab are in the height direction (movement direction of the valve body 40) regardless of the opening degree. Since they overlap to form a labyrinth structure, the short-cutting of the liquid toward the liquid outlet 28 as described above is greatly reduced.

したがって、液体供給口２１から供給される液体は、液体供給口２１の開度によらず、常に、接続流路２９側へと優位に流れるものになっている。
このため、第２実施形態では、洗浄に際して、洗浄液を供給する状態でダイアフラム３０を駆動させ、液体供給口２１を全閉と全開を繰り返すような動作とすることで、ラビリンス構造部分に付着した塗料等の液体を洗浄するのと併せて、優位に洗浄液が接続流路２９側へと流れ、短時間で洗浄を行うことができ、洗浄液の使用量を大幅に低減することができる。 Therefore, the liquid supplied from the liquid supply port 21 always flows predominantly toward the connection flow path 29 side regardless of the opening degree of the liquid supply port 21.
Therefore, in the second embodiment, at the time of cleaning, the diaphragm 30 is driven in a state of supplying the cleaning liquid, and the liquid supply port 21 is repeatedly closed and fully opened, so that the paint adhering to the labyrinth structure portion is formed. In addition to cleaning the liquid such as, the cleaning liquid predominantly flows to the connection flow path 29 side, and the cleaning can be performed in a short time, and the amount of the cleaning liquid used can be significantly reduced.

ところで、第２実施形態の場合、流出部３３ａｃが接続流路２９に向くように仕切り部３３ａが配置されていないと、液体の接続流路２９側への流れが阻害されることになる。 By the way, in the case of the second embodiment, if the partition portion 33a is not arranged so that the outflow portion 33ac faces the connection flow path 29, the flow of the liquid to the connection flow path 29 side is obstructed.

そこで、図８に示す仕切り部３３ａの変形例のように、仕切り部３３ａに、流出部３３ａｃが接続流路２９に対応する位置に位置させる位置決め部３３ａｄを設けるようにしてもよい。 Therefore, as in the modified example of the partition portion 33a shown in FIG. 8, the partition portion 33a may be provided with a positioning portion 33ad that positions the outflow portion 33ac at a position corresponding to the connection flow path 29.

具体的には、リング状壁部３３ａｂの流出部３３ａｃの近くに、リング状壁部３３ａｂの外周面から外側に延在する棒状の位置決め部３３ａｄを設けるようにしている。 Specifically, a rod-shaped positioning portion 33ad extending outward from the outer peripheral surface of the ring-shaped wall portion 33ab is provided near the outflow portion 33ac of the ring-shaped wall portion 33ab.

この場合、本体部２０の一方側を見た図である図９に示すように、本体部２０に位置決め部３３ａｄを挿入するためのガイド溝２１ｃを仕切り部３３ａが位置することになる拡径開口２１ｂに連通するように設けて、このガイド溝２１ｃに位置決め部３３ａｄが嵌ると、仕切り部３３ａの流出部３３ａｃが接続流路２９に向くようにすればよい。
なお、ガイド溝２１ｃの深さ（弁体４０の動き方向の深さ）は、弁体４０の動きを阻害しない深さに設定される。 In this case, as shown in FIG. 9, which is a view of one side of the main body 20, the diameter-expanded opening in which the partition 33a is located in the guide groove 21c for inserting the positioning portion 33ad into the main body 20. It may be provided so as to communicate with 21b, and when the positioning portion 33ad fits into the guide groove 21c, the outflow portion 33ac of the partition portion 33a may face the connection flow path 29.
The depth of the guide groove 21c (depth in the movement direction of the valve body 40) is set to a depth that does not hinder the movement of the valve body 40.

このようにしておけば、流出部３３ａｃが接続流路２９に向いていない状態に仕切り部３３ａが配置されることがなく、適切な配置状態に仕切り部３３ａを配置することができる。 By doing so, the partition portion 33a is not arranged in a state where the outflow portion 33ac is not facing the connection flow path 29, and the partition portion 33a can be arranged in an appropriate arrangement state.

以上、具体的な実施形態に基づいて本発明の流量制御弁１０について説明してきたが、本発明は、上記の具体的な実施形態に限定されるものではない。
上記実施形態では、液体供給口２１が本体部２０の中央に位置するように形成されている場合について示してきたが、液体供給口２１が必ずしも本体部２０の中央に位置する必要はない。 Although the flow control valve 10 of the present invention has been described above based on the specific embodiment, the present invention is not limited to the above specific embodiment.
In the above embodiment, the case where the liquid supply port 21 is formed so as to be located at the center of the main body portion 20 has been shown, but the liquid supply port 21 does not necessarily have to be located at the center of the main body portion 20.

例えば、図１０に示すように、液体供給口２１は、本体部２０の中心からオフセットした位置に設けられていてもよい。
このように、本発明は、実施形態に限定されるものではなく、適宜、変形や改良を施したものも本発明の技術的範囲に含まれるものであり、そのことは、当業者にとって特許請求の範囲の記載から明らかである。 For example, as shown in FIG. 10, the liquid supply port 21 may be provided at a position offset from the center of the main body 20.
As described above, the present invention is not limited to the embodiments, and those which have been appropriately modified or improved are also included in the technical scope of the present invention, which is claimed by those skilled in the art. It is clear from the description of the range of.

１０流量制御弁
２０本体部
２０Ａ内壁部
２０ＡＡ切欠部
２０ＡＢ外周部
２０Ｂ外壁部
２０ＢＡ内周部
２０Ｃ閉鎖壁部
２１液体供給口
２１ａ段部
２１ｂ拡径開口
２１ｃガイド溝
２２段差面
２３受けリング
２４リング溝
２５シールリング
２６螺合孔
２７螺合孔
２８液体流出口
２９接続流路
３０ダイアフラム
３０ａ貫通孔
３１第１円板部材
３２第２円板部材
３３第１保護部材
３３ａ仕切り部
３３ａａ底部
３３ａｂリング状壁部
３３ａｃ流出部
３３ａｄ位置決め部
３４第２保護部材
３５ナット
４０弁体
４１弁頭
４２弁棒
４３固定部
５０蓋部
５１空間
５２気体供給部
５３貫通孔
５４貫通孔
６０配管取付部
６１貫通孔
６２端面
６３貫通孔
６５配管接続部
７０ボルト
７１ボルト
７３液体流出路接続部材 10 Flow control valve 20 Main body 20A Inner wall 20AA Notch 20AB Outer wall 20B Outer wall 20BA Inner circumference 20C Closed wall 21 Liquid supply port 21a Step 21b Widened opening 21c Guide groove 22 Step surface 23 Receiving ring 24 Ring groove 25 Seal ring 26 Screw hole 27 Screw hole 28 Liquid outlet 29 Connection flow path 30 Diaphragm 30a Through hole 31 First disk member 32 Second disk member 33 First protective member 33a Partition 33aa Bottom 33ab Ring-shaped wall Part 33ac Outflow part 33ad Positioning part 34 Second protective member 35 Nut 40 Valve body 41 Valve head 42 Valve rod 43 Fixing part 50 Lid part 51 Space 52 Gas supply part 53 Through hole 54 Through hole 60 Pipe mounting part 61 Through hole 62 End face 63 Through hole 65 Pipe connection 70 Bolt 71 Bolt 73 Liquid outflow path connection member

Claims

A main body having a liquid supply port that communicates from the other side to one side,
A diaphragm arranged on the main body on one side and
A valve body attached to the diaphragm and controlling the opening degree of the liquid supply port by driving the diaphragm is provided.
The main body
A liquid outlet that allows the liquid supplied from the liquid supply port to flow out of the main body, and
Only one groove-shaped connection flow path connecting the liquid supply port and the liquid outlet in an arc shape,
An inner wall portion having a notch that surrounds the liquid supply port and connects the liquid supply port and the connection flow path, and
An outer wall portion having an inner peripheral portion forming the connection flow path with the outer peripheral portion of the inner wall portion, and an outer wall portion.
A closed wall portion provided in a part in the circumferential direction and filling a portion between the inner wall portion and the outer wall portion which is not the connecting flow path is provided .
The end surface on one side of the closed wall portion is formed as an inclined surface approaching the other side toward the inner wall portion side.
The diaphragm is characterized in that when the liquid supply port is fully opened, the liquid abuts on one end surface of the closed wall portion and the liquid does not flow over the one end surface of the closed wall portion. Flow control valve.

A lid portion that is arranged on one side and sandwiches the diaphragm with the main body portion and forms a space between the diaphragm and the diaphragm.
The flow rate control valve according to claim 1, further comprising a gas supply unit provided on the lid portion and supplying a gas for driving the diaphragm to the space.

A partition having a ring-shaped wall that is attached to the diaphragm and inserted into the liquid supply port.
The flow rate control valve according to claim 1 or 2, wherein the ring-shaped wall portion is formed with an outflow portion that allows liquid to flow out into the connection flow path.

The flow rate control valve according to claim 3, wherein the outflow portion is a notch or a hole formed in the ring-shaped wall portion.

The flow rate control valve according to claim 3 or 4, wherein the partition portion includes a positioning portion for positioning the outflow portion at a position corresponding to the connection flow path.

The flow rate control valve according to any one of claims 1 to 5 , wherein the liquid supply port is provided at a central position of the main body.