JP5060874B2 - Ball valve - Google Patents

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JP5060874B2
JP5060874B2 JP2007219404A JP2007219404A JP5060874B2 JP 5060874 B2 JP5060874 B2 JP 5060874B2 JP 2007219404 A JP2007219404 A JP 2007219404A JP 2007219404 A JP2007219404 A JP 2007219404A JP 5060874 B2 JP5060874 B2 JP 5060874B2
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ball valve
valve
bearing portion
outlet
ribs
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JP2009052640A (en
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雅晴 伊東
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Fujikoki Corp
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Description

この発明は、給湯システムの流路を切り換える三方切換用ボールバルブや四方切換用ボールバルブ等として用いられるボールバルブに関する。 The present invention relates to a ball valve used as a three-way switching ball valve or a four-way switching ball valve for switching a flow path of a hot water supply system.

従来、ボールバルブとして、流入口から流入する流体を、二つの流出口のそれぞれに繋がるルートに切換・変更する三方切換用ボールバルブ、又は三つの流出口のそれぞれに繋がるルートに切換・変更する四方切換用ボールバルブが用いられている。 Conventionally, a four-way of a ball valve, the fluid flowing from the inlet to the switching or change the route leading to each of the three-way switching ball valve, or three outlet to switch or change the route leading to each of the two outlet A switching ball valve is used.

このようなボールバルブは、例えばユニットバス用のものとして、浴槽内の湯水の湯温を給湯ユニットで調節して循環させる循環路に適用されている。四方切換用ボールバルブの場合、循環路を流れる湯水は、浴槽、給湯ユニット又は外部と三つのルートのいずれかに切り換えて供給される。 Such a ball valve is used for a unit bath, for example, and is applied to a circulation path that circulates by adjusting the temperature of hot water in a bathtub with a hot water supply unit. In the case of a four-way switching ball valve , hot water flowing through the circulation path is supplied by switching to a bathtub, a hot water supply unit, or the outside and one of three routes.

図３は、従来のこの種のボールバルブの一例を示す一部断面側面図、図４は図３のボールバルブのモータ装着部の平面図である。このボールバルブは、三方切換用ボールバルブとして構成されており、弁ケース２０に形成されている弁室２１内には球体状の弁体１０が回転可能に支持されている。弁体１０には、流入路１１と当該流入路１１に繋がる流出路１２とからなる流路が形成されている。弁ケース２０には、流入路１１と接続される流入口２２が形成されていると共に、流出口として第１流出口２３が形成されている。 FIG. 3 is a partially sectional side view showing an example of this type of conventional ball valve , and FIG. 4 is a plan view of a motor mounting portion of the ball valve of FIG. This ball valve is configured as a three-way switching ball valve , and a spherical valve body 10 is rotatably supported in a valve chamber 21 formed in the valve case 20. The valve body 10 is formed with a flow path including an inflow path 11 and an outflow path 12 connected to the inflow path 11. In the valve case 20, an inflow port 22 connected to the inflow passage 11 is formed, and a first outflow port 23 is formed as an outflow port.

弁ケース２０には、もう一つの流出口である第２流出口２４が接続されている。第２流出口２４の基端部２５は、例えば超音波溶着によって弁ケース２０に溶着される。弁ケース２０側の環状の溶接部２２ａに対して、基端部２５側の環状の溶接部２５ａが溶着されている。溶接部２５ａの内側に環状の弁体当接部２５ｂが形成されており、この弁体当接部２５ｂには球状の弁体１０が当接している。   A second outlet 24, which is another outlet, is connected to the valve case 20. The base end portion 25 of the second outlet 24 is welded to the valve case 20 by, for example, ultrasonic welding. The annular welded portion 25a on the base end portion 25 side is welded to the annular welded portion 22a on the valve case 20 side. An annular valve body contact portion 25b is formed inside the welded portion 25a, and the spherical valve body 10 is in contact with the valve body contact portion 25b.

弁体１０を回転駆動するための駆動部としてのギヤードモータ３０が、弁ケース２０のモータ装着部２６に取り付けられている。ギヤードモータ３０の出力軸に連結された弁軸３１は、弁ケース２０のモータ装着部２６に形成された貫通孔２７内を貫通して延びており、先端が弁体１０に連結されている。ギヤードモータ３０を駆動することにより、弁軸３１の回転は弁体１０に伝達されて、弁体１０が弁室２１内において回転する。   A geared motor 30 as a drive unit for rotationally driving the valve body 10 is attached to the motor mounting part 26 of the valve case 20. The valve shaft 31 connected to the output shaft of the geared motor 30 extends through a through hole 27 formed in the motor mounting portion 26 of the valve case 20, and the tip is connected to the valve body 10. By driving the geared motor 30, the rotation of the valve shaft 31 is transmitted to the valve body 10, and the valve body 10 rotates in the valve chamber 21.

弁軸３１には、複数個所（図示の例では、軸方向に２個所）に周溝３２が形成されており、各周溝３２にはＯリング３３が嵌着されている。Ｏリング３３は、貫通孔２７の内周面に圧接されていて、弁室２１内の湯水が貫通孔２７を介して外部に漏れ出るのを防止している。   The valve shaft 31 is formed with circumferential grooves 32 at a plurality of locations (two locations in the axial direction in the illustrated example), and O-rings 33 are fitted into the circumferential grooves 32. The O-ring 33 is in pressure contact with the inner peripheral surface of the through hole 27 and prevents the hot water in the valve chamber 21 from leaking outside through the through hole 27.

弁体１０を回転させることで、弁体１０の流出路１２を第１流出口２３又は第２流出口２４に連通させることにより、流入口２２を流路１１，１２を通じて第１流出口２３と第２流出口２４とのいずれかに選択的に連通させることができる。この種のボールバルブの一例が特許文献１に開示されている。 By rotating the valve body 10, the outflow path 12 of the valve body 10 is communicated with the first outlet 23 or the second outlet 24, so that the inlet 22 is connected to the first outlet 23 through the flow paths 11 and 12. Any one of the second outlets 24 can be selectively communicated. An example of this type of ball valve is disclosed in Patent Document 1.

弁ケース２０は、例えば、軽量で耐熱・耐薬品性に優れたＳＰＳ（シンジオタクチックポリスチレン樹脂）等の樹脂で成形されるが、その設計に際しては、肉盗みによって成形品の各部の肉厚の均一化を図ることで、成形時に、ヒケと称する成形不良が生じるのを防止している。なお、薄肉化により強度不足が生じる個所には、補強用のリブを設けて強度の向上が図られている。   The valve case 20 is molded from a resin such as SPS (syndiotactic polystyrene resin) that is lightweight and excellent in heat resistance and chemical resistance, for example. By achieving uniformity, molding defects called sink marks are prevented from occurring during molding. It should be noted that a reinforcing rib is provided at a location where the strength is insufficient due to the thinning, thereby improving the strength.

図４に示すように、弁ケース２０のモータ装着部２６には、外周縁部２と弁軸３１を回転自在に支持する軸受部５とが、それぞれほぼ同じ幅で形成されている。外周縁部２のうち二つのコーナ部２ａ，２ｂには、ギヤードモータ３０に設けられた位置決め用のピンが挿入されるピン孔３，３と、位置決めされたギヤードモータ３０をモータ装着部２６に固定するための固定具が挿入される取付孔４，４が形成されている。各ピン孔３と取付孔４の周面は、外周縁部２に連なる平坦面に形成されている。   As shown in FIG. 4, the motor mounting portion 26 of the valve case 20 is formed with the outer peripheral edge portion 2 and the bearing portion 5 that rotatably supports the valve shaft 31 with substantially the same width. Of the outer peripheral edge portion 2, two corner portions 2 a and 2 b are provided with pin holes 3 and 3 into which positioning pins provided on the geared motor 30 are inserted, and the positioned geared motor 30 is attached to the motor mounting portion 26. Mounting holes 4 and 4 are formed into which fixing tools for fixing are inserted. The peripheral surfaces of the pin holes 3 and the attachment holes 4 are formed as flat surfaces that are continuous with the outer peripheral edge 2.

上記モータ装着部２６の場合、コーナ部２ａ，２ｂを含む外周縁部２と軸受部５とを残して、肉盗み（ハッチングで示す）６が設けられている。肉盗み６を設けたことによる強度不足を補うため、軸受部５には、径外方向へ放射状に延びる複数のリブ７が形成されている。複数のリブ７は、軸受部５と外周縁部２とを結合するように形成されている。リブ７の上面は、ギヤードモータ３０の底面と隙間なく当接するように、コーナ部２ａ，２ｂを含む外周縁部２及び軸受部５の上面と面一に形成されている。   In the case of the motor mounting portion 26, a meat stealer (indicated by hatching) 6 is provided, leaving the outer peripheral edge portion 2 including the corner portions 2 a and 2 b and the bearing portion 5. In order to compensate for the lack of strength due to the provision of the meat stealing 6, the bearing portion 5 is formed with a plurality of ribs 7 extending radially outward. The plurality of ribs 7 are formed so as to couple the bearing portion 5 and the outer peripheral edge portion 2. The top surface of the rib 7 is formed flush with the top surface of the outer peripheral edge portion 2 including the corner portions 2a and 2b and the bearing portion 5 so as to come into contact with the bottom surface of the geared motor 30 without a gap.

ところで、かかる成形品に関して、リブ７を設けることで補強した場合、軸受部５とリブ７との結合部８は、その周りの他の部分よりも肉厚になるので、溶融樹脂が固化する際の収縮に起因してヒケが発生することがある。このヒケは軸受部５の内周面に生じると、弁軸３１と軸受部５との間に設けられるＯリング３３によるシールが確保できなくなり、流体漏れの原因になる。
特開２００４−２７８６３１号公報（段落０００３〜０００５、００１７〜００１９、図２〜図４） By the way, when it reinforces by providing the rib 7 regarding such a molded article, since the joint part 8 of the bearing part 5 and the rib 7 becomes thicker than the other part around it, the molten resin is solidified. Sinking may occur due to contraction of the skin. When this sink mark is generated on the inner peripheral surface of the bearing portion 5, it becomes impossible to secure a seal by the O-ring 33 provided between the valve shaft 31 and the bearing portion 5, which causes fluid leakage.
Japanese Unexamined Patent Publication No. 2004-278631 (paragraphs 0003 to 0005, 0017 to 0019, FIGS. 2 to 4)

そこで、この発明の目的は、弁体を回転させる弁軸が貫通する貫通孔を有する弁本体が樹脂成形品であるボールバルブにおいて、成形時のヒケに起因する流体もれを防止することにある。 Accordingly, an object of the present invention is to prevent fluid leakage due to sink marks during molding in a ball valve in which a valve body having a through hole through which a valve shaft for rotating a valve body passes is a resin molded product. .

上記の目的を達成するため、この発明によるボールバルブは、流入口と複数の流出口とが形成された樹脂成形品の弁ケースと、該弁ケース内に回転可能に配置されており回転させることにより前記流入口をいずれかの前記流出口に選択的に連通させるボール弁体とを備え、前記弁ケースに連設されたモータ装着部に装着されるモータによって前記ボール弁体を回転駆動するボールバルブであって、前記弁ケースは、前記ボール弁体を回転させる弁軸が貫通する貫通孔を有する円環状の軸受部と、該軸受部の周囲に形成された複数の肉盗みと、前記軸受部の外周から外方に向けて延びる複数の補強用のリブとを有し、前記リブのそれぞれは扇形形状のブリッジ部を介して前記軸受部に連なっており、前記ブリッジ部のそれぞれには前記モータ装着部の厚みに相当する深さで円柱形状の小肉盗みが形成されていることを特徴としている。 To achieve the above object, a ball valve according to the invention, the inlet and a plurality of outlet and a resin molded article formed of the valve case, be rotated is rotatably disposed within the valve casing the flow Bei example a ball valve for selectively communicating the inlet to one of said outlet, is driven to rotate the ball valve body by a motor mounted on a motor mounting portion provided continuously to the valve casing by a ball valve, the valve casing includes a bearing portion of the annular having a through hole which the valve shaft rotating the ball valve element extends, and a plurality of thinned formed around the said bearing portion, said It has a rib for a plurality of reinforcement extending outwardly from the outer periphery of the bearing portion, each of said ribs are continuous with the bearing part via a bridge portion of the fan shape, each of the bridge portions The motor equipment It is characterized in that the small thinned cylindrical in depth corresponding to the thickness of the part is formed.

このボールバルブによれば、補強用のリブと軸受部との結合部には、その肉厚を小さくする小肉盗みが形成されているので、弁ケースの射出成形時に、結合部がその近傍と比較して大幅に肉厚に形成されていたときに生じるようなヒケが貫通孔の内周面に生じることがなく、弁ケース内の流体が貫通孔を介して外部に漏れるのを防ぐことができる。 According to this ball valve , a small-wall stealer that reduces the wall thickness is formed at the coupling portion between the reinforcing rib and the bearing portion. There is no sink on the inner peripheral surface of the through-hole that would occur when it was formed to be significantly thicker, and it is possible to prevent the fluid in the valve case from leaking outside through the through-hole. it can.

以下、添付した図面に基づいて、この発明によるボールバルブの実施形態を説明する。図１は本実施形態のボールバルブの一部を断面で示した側面図、図２は図１のボールバルブのモータ装置部の平面図である。図１及び図２に示すボールバルブにおいて、図３及び図４に示す従来のボールバルブと同等の構造については、図３及び図４と同じ符号を用いることで、再度の説明を省略する。 Hereinafter, embodiments of a ball valve according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a side view showing a part of the ball valve of the present embodiment in section, and FIG. 2 is a plan view of a motor device portion of the ball valve of FIG. In the ball valve shown in FIGS. 1 and 2, the same reference numerals as those in FIGS. 3 and 4 are used for the same structure as the conventional ball valve shown in FIGS.

図１及び図２に示すボールバルブ１によれば、軸受部５から径外方向に放射状に延びる４本のリブ７が軸受部５と結合する４カ所の結合部８には、その肉厚を小さくする小肉盗み９が形成されている。小肉盗み９は、結合部８の中央部に上下に延びるように形成されている。小肉盗み９は、図１の断面図に示すように、モータ装着部２６の上面からモータ装着部２６の厚みに相当する深さで円柱形状に形成されている。 According to the ball valve 1 shown in FIGS. 1 and 2, the thickness of the four coupling portions 8 where the four ribs 7 extending radially outward from the bearing portion 5 are coupled to the bearing portion 5 is reduced in thickness. A small meat steal 9 to be reduced is formed. The small meat steal 9 is formed so as to extend vertically in the central portion of the coupling portion 8. As shown in the cross-sectional view of FIG. 1, the small meat stealer 9 is formed in a cylindrical shape with a depth corresponding to the thickness of the motor mounting portion 26 from the upper surface of the motor mounting portion 26.

したがって、結合部８においては、軸受部５は円筒の一部である扇形形状のブリッジ部８ａ，８ａを介してリブ部７に接続されており、結合部８が周囲と比べて大幅に肉厚になることがない。それゆえ、樹脂が冷却固化する際にヒケが生じるのを回避することができる。   Therefore, in the coupling portion 8, the bearing portion 5 is connected to the rib portion 7 via the fan-shaped bridge portions 8a and 8a that are part of the cylinder, and the coupling portion 8 is significantly thicker than the surroundings. Never become. Therefore, it is possible to avoid the occurrence of sink marks when the resin is cooled and solidified.

このボールバルブにおいては、射出成形の際にヒケが軸受部５の内周面に現れることがない。その結果、弁軸３１に装着されるＯリング３３と軸受部５の内周面との間に隙間が生じる、或いはシール圧力が低下するなどによって、シール漏れに繋がることがない。 In this ball valve , sink marks do not appear on the inner peripheral surface of the bearing portion 5 during injection molding. As a result, there is no gap between the O-ring 33 attached to the valve shaft 31 and the inner peripheral surface of the bearing portion 5, or the seal pressure does not lead to seal leakage.

本発明によるボールバルブの一実施形態を示す図であって、一部を断面で示す側面図である。It is a figure which shows one Embodiment of the ball valve by this invention, Comprising: It is a side view which shows a part in cross section. 図１に示すボールバルブのモータ装着部の平面図である。It is a top view of the motor mounting part of the ball valve shown in FIG. 従来のボールバルブの一例を示す図であって、一部を断面で示す側面図である。It is a figure which shows an example of the conventional ball valve , Comprising: It is a side view which shows a part in cross section. 図３に示すボールバルブのモータ装着部の平面図である。It is a top view of the motor mounting part of the ball valve shown in FIG.

１ ボールバルブ ２ 外周縁部
２ａ，２ｂ コーナ部 ３ ピン孔
４ 取付孔 ５ 軸受部
６ 薄肉部 ７ リブ
８ 結合部 ９ 小肉盗み
１０ 弁体 １１ 流入路
１２ 流出路
２０ 弁ケース ２１ 弁室
２２ 流入口 ２２ａ 溶接部
２３ 第１流出口 ２４ 第２流出口
２５ 基端部 ２５ａ 溶接部
２５ｂ 弁体当接部 ２６ モータ装着部
２７ 貫通孔
３０ ギヤードモータ ３１ 弁軸
３２ 周溝 ３３ Ｏリング DESCRIPTION OF SYMBOLS 1 Ball valve 2 Outer peripheral edge part 2a, 2b Corner part 3 Pin hole 4 Mounting hole 5 Bearing part 6 Thin part 7 Rib 8 Coupling part 9 Small stealing 10 Valve body 11 Inflow path 12 Outflow path 20 Valve case 21 Valve chamber 22 Flow Inlet 22a Welded portion 23 First outlet 24 Second outlet 25 Base end portion 25a Welded portion 25b Valve body abutting portion 26 Motor mounting portion 27 Through hole 30 Geared motor 31 Valve shaft 32 Circumferential groove 33 O-ring

Claims (3)

流入口と複数の流出口とが形成された樹脂成形品の弁ケースと、該弁ケース内に回転可能に配置されており回転させることにより前記流入口をいずれかの前記流出口に選択的に連通させるボール弁体とを備え、前記弁ケースに連設されたモータ装着部に装着されるモータによって前記ボール弁体を回転駆動するボールバルブであって、
前記弁ケースは、前記ボール弁体を回転させる弁軸が貫通する貫通孔を有する円環状の軸受部と、該軸受部の周囲に形成された複数の肉盗みと、前記軸受部の外周から外方に向けて延びる複数の補強用のリブとを有し、前記リブのそれぞれは扇形形状のブリッジ部を介して前記軸受部に連なっており、前記ブリッジ部のそれぞれには前記モータ装着部の厚みに相当する深さで円柱形状の小肉盗みが形成されていることを特徴とするボールバルブ。 Inlet and a plurality of outlet and a resin molded article formed of the valve casing, selectively the inlet to one of said outlet by rotating is rotatably disposed within the valve casing e Bei a ball valve element to communicate, a ball valve that rotates the ball valve body by a motor mounted on a motor mounting portion provided continuously on the valve casing,
It said valve casing includes a bearing portion of the annular having a through hole which the valve shaft rotating the ball valve element extends, and a plurality of thinned formed around the bearing portion, out of the outer periphery of the bearing portion It has a plurality of ribs for reinforcement that extends towards each of the ribs is continuous with the bearing part via a bridge portion of the fan-shaped, the thickness of the motor mounting section in each of the bridge portions A ball valve characterized in that a cylindrical thin wall stealer is formed at a depth corresponding to . 前記貫通孔の内周面と前記弁軸との間の隙間がＯリング等のシール部材によってシールされていることを特徴とする請求項１記載のボールバルブ。 The ball valve according to claim 1, wherein a gap between an inner peripheral surface of the through hole and the valve shaft is sealed by a sealing member such as an O-ring. 前記リブは前記軸受部の外周から放射状に延びるように複数本形成されていることを特徴とする請求項１又は２に記載のボールバルブ。 The ball valve according to claim 1 or 2, wherein a plurality of the ribs are formed so as to extend radially from the outer periphery of the bearing portion.
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JPS62116196U (en) * 1986-01-16 1987-07-23
JP3370210B2 (en) * 1995-06-22 2003-01-27 三菱エンジニアリングプラスチックス株式会社 Synthetic resin fluid control valve body
JPH09229212A (en) * 1996-02-26 1997-09-05 Matsushita Electric Ind Co Ltd Valve device
JP4286561B2 (en) * 2003-03-14 2009-07-01 株式会社不二工機 Switching valve

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