JP2019074182A - Flow passage switching vale - Google Patents

Flow passage switching vale Download PDF

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JP2019074182A
JP2019074182A JP2017202303A JP2017202303A JP2019074182A JP 2019074182 A JP2019074182 A JP 2019074182A JP 2017202303 A JP2017202303 A JP 2017202303A JP 2017202303 A JP2017202303 A JP 2017202303A JP 2019074182 A JP2019074182 A JP 2019074182A
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cam
valve
groove
casing
cam groove
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JP7016207B2 (en
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義人 佐合
Yoshito Sago
義人 佐合
信一 高橋
Shinichi Takahashi
信一 高橋
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Danle Co Ltd
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Abstract

To provide a flow passage switching valve that is reduced in the number of components more than before and operates stably, and that includes a casing formed with an inflow port and a plurality of flow out ports, and a plurality of oscillation valves disposed in the casing and opening and closing the flow out ports.SOLUTION: A flow passage switching valve includes: a casing formed with an inflow port and a plurality of flow out ports; a plurality of oscillation valves disposed in the casing and opening and closing the flow out ports; and a rotary cam engaging with the oscillation valves to oscillate and drive the oscillation valves.SELECTED DRAWING: Figure 1

Description

本発明は、流路切換弁に関するものである。 The present invention relates to a flow path switching valve.

流入口と複数の流出口とが形成されたケーシングと、ケーシング内に配設されて流出口を開閉する複数の揺動弁と、前記複数の揺動弁に係合して揺動弁を開弁方向へ揺動駆動する軸部材と、揺動弁を閉弁方向へ揺動駆動するバネと備えることを特徴とする流路切換弁が、特許文献１に開示されている。
特許文献１の流路切換弁においては、軸部材が直動することにより揺動弁が開弁方向へ揺動駆動され、バネが伸びることにより揺動弁が閉弁方向へ揺動される。 A casing having an inlet and a plurality of outlets, a plurality of oscillating valves disposed in the casing for opening and closing the outlets, and the plurality of oscillating valves being engaged to open the oscillating valves Patent Document 1 discloses a flow path switching valve including a shaft member that is driven to swing in a valve direction, and a spring that is driven to swing the swing valve in a valve closing direction.
In the flow path switching valve of Patent Document 1, the pivoting valve is driven to swing in the valve opening direction by linear movement of the shaft member, and the swinging valve is pivoted in the valve closing direction by extending the spring.

実開昭５９−１８８３９８号公報Japanese Utility Model Application Publication No. 59-188398

特許文献１の流路切換弁には、揺動弁の開閉を互いに別個の二つの部材で行っているので部材数が多く、またバネによる揺動弁の揺動駆動が安定しないという問題がある。
本発明は、上記問題に鑑みてなされたものであり、流入口と複数の流出口とが形成されたケーシングと、ケーシング内に配設されて流出口を開閉する複数の揺動弁とを備える流路切換弁であって、従来に比べて部材数が少なく、作動が安定した流路切換弁を提供することを目的とする。 The flow path switching valve of Patent Document 1 has a problem that the number of members is large because the opening and closing of the rocking valve are performed by two separate members from each other, and the rocking drive of the rocking valve by the spring is not stable. .
The present invention has been made in view of the above problems, and includes a casing in which an inlet and a plurality of outlets are formed, and a plurality of oscillating valves disposed in the casing for opening and closing the outlets. An object of the present invention is to provide a flow passage switching valve which has a smaller number of members than in the prior art and which has a stable operation.

上記課題を解決するために、本発明においては、流入口と複数の流出口とが形成されたケーシングと、ケーシング内に配設されて流出口を開閉する複数の揺動弁と、前記複数の揺動弁に係合して揺動弁を揺動駆動する回転カムとを備えることを特徴とする流路切換弁を提供する。
回転カムを用いて揺動弁を揺動駆動することにより、揺動弁を開閉することができる。バネを使用しないので、従来に比べて部材数が低減し、作動が安定する。 In order to solve the above problems, in the present invention, a casing having an inlet and a plurality of outlets, a plurality of oscillating valves disposed in the casing for opening and closing the outlets, and a plurality of the oscillating valves. There is provided a flow path switching valve characterized by comprising a rotary cam engaged with a rocking valve to rock and drive the rocking valve.
The rocking valve can be opened and closed by rocking the rocking valve using the rotary cam. Since no spring is used, the number of members is reduced and the operation is stabilized compared to the prior art.

本発明の好ましい態様においては、回転カムは環状のカム溝を備え、揺動弁は前記カム溝に係合するカムロッドを備える。
回転カムの環状のカム溝にカムロッドを係合させることにより、揺動弁を開閉方向に揺動駆動できる。
本発明の好ましい態様においては、環状のカム溝の外周側壁の一部が切り欠かれている。
環状のカム溝の内周側面はカムロッドを径方向外方へ付勢し、ひいては揺動弁を閉弁方向に付勢して弁座に押し当てる。環状のカム溝の外周側面はカムロッドを径方向内方へ付勢し、ひいては揺動弁を開弁方向に付勢する。環状のカム溝の内周側面がカムロッドを径方向外方へ付勢し、ひいては揺動弁を閉弁方向に付勢して弁座に押し当てているカム溝の周方向領域では、揺動弁の閉弁方向の揺動は弁座によって規制されるので、カム溝の外周側面ひいては外周側壁は不要である。この部分を切り欠くことにより、カムの構造が簡素化され、ひいては流路切換弁の構造が簡素化される。
本発明の好ましい態様においては、ケーシングが備えるＵ溝を有する軸受と、揺動弁が有し軸受のＵ溝に嵌合する軸部とによって、揺動弁の軸支部が形成されており、カムロッドはカム溝の底面に常時当接し、軸部はＵ溝の底面に常時当接する。
カムロッドをカム溝の底面に常時当接させ、軸部をＵ溝の底面に常時当接させることにより、カム溝とＵ溝とで揺動弁を常時挟持して揺動弁を安定的に作動させることができる。
本発明の好ましい態様においては、軸受と軸部とは、延在方向に２分割されており、２つの半部分の間の隙間に介在し、軸部の半部分に相対摺動可能に当接するリブがケーシングに形成されている。
軸受と軸部とを、延在方向に２分割し、２つの半部分の間の隙間に介在し、軸部の半部分に相対摺動可能に当接するリブをケーシングに形成することにより、単一の部材で揺動弁を軸部の延在方向に位置決めできる。 In a preferred aspect of the present invention, the rotating cam comprises an annular cam groove, and the rocking valve comprises a cam rod engaged with said cam groove.
By engaging the cam rod with the annular cam groove of the rotary cam, the rocking valve can be driven to rock in the opening and closing direction.
In a preferred embodiment of the present invention, a part of the outer peripheral side wall of the annular cam groove is cut out.
The inner peripheral side surface of the annular cam groove biases the cam rod radially outward, and consequently biases the rocking valve in the valve closing direction to press it against the valve seat. The outer peripheral side surface of the annular cam groove biases the cam rod radially inward, and thus biases the swing valve in the valve opening direction. The inner peripheral side surface of the annular cam groove urges the cam rod radially outward, and in the circumferential region of the cam groove which urges the rocking valve in the valve closing direction and presses it against the valve seat, Since the swinging of the valve in the valve closing direction is regulated by the valve seat, the outer peripheral side surface of the cam groove and hence the outer peripheral side wall are unnecessary. By notching this portion, the structure of the cam is simplified and thus the structure of the flow path switching valve is simplified.
In a preferred aspect of the present invention, the pivoting portion of the pivoting valve is formed by a bearing having a U groove provided in the casing, and a shaft portion of the pivoting valve and fitted in the U groove of the bearing, and a cam rod Is always in contact with the bottom surface of the cam groove, and the shaft is always in contact with the bottom surface of the U groove.
The cam rod is always in contact with the bottom surface of the cam groove and the shaft is always in contact with the bottom surface of the U groove, whereby the rocking valve is always held between the cam groove and the U groove to operate the rocking valve stably It can be done.
In a preferred aspect of the present invention, the bearing and the shaft portion are divided in the extending direction into two, and are interposed in a gap between two half portions, and abut relative sliding on the half portion of the shaft portion. Ribs are formed on the casing.
By dividing the bearing and the shaft in the extending direction into two, and interposing in the gap between the two halves, and forming a rib on the casing that abuts relative to the half of the shaft in a relatively slidable manner, The swing valve can be positioned in the extension direction of the shaft by one member.

本発明の実施例に係る流路切換弁の構造図である。（ａ）は断面図であり（ｂ）は（ａ）のｂ−ｂ矢視図である。It is a block diagram of the flow-path switching valve concerning the Example of this invention. (A) is a cross-sectional view and (b) is a bb arrow view of (a). 本発明の実施例に係る流路切換弁が備える回転カムの構造図である。（ａ）は上面図であり、（ｂ）は底面図である。It is a block diagram of the rotating cam with which the flow-path switching valve concerning the Example of this invention is provided. (A) is a top view, (b) is a bottom view. 本発明の実施例に係る流路切換弁が備える揺動弁の構造図である。（ａ）は正面であり、（ｂ）は（ａ）のｂ−ｂ矢視図であり、（ｃ）は（ａ）のｃ−ｃ矢視図であり、（ｄ）は変形例に係る揺動弁の（ｂ）に相当する図である。It is a block diagram of the rocking valve with which the flow-path switching valve concerning the Example of this invention is provided. (A) is a front view, (b) is a view in the direction of the arrow b-b of (a), (c) is a view in the direction of the arrow c-c of (a), (d) relates to a modification It is a figure corresponded to (b) of a rocking valve.

図１に示すように、流路切換弁１は、頂壁に軸挿通穴２ａが形成され、底壁に流入口２ｂが形成され、周側壁に等間隔で４つの流出口２ｃ、２ｄ、２ｅ、２ｆが形成された、頂壁と底壁とを有する円筒状のケーシング２と、ケーシング２内に配設されて流出口２ｃ、２ｄ、２ｅ、２ｆを開閉する揺動弁３ｃ、３ｄ、３ｅ、３ｆと、揺動弁３ｃ、３ｄ、３ｅ、３ｆに係合して揺動弁３ｃ、３ｄ、３ｅ、３ｆを揺動駆動する回転カム４とを備えている。回転カム４が有する回転軸４ａの一端がケーシング頂壁の軸挿通穴２ａに挿通され、他端がケーシング底壁によって回転可能に支持されている。
図２に示すように、回転カム４の底面に、環状カム溝４ｂが形成されている。環状カム溝４ｂは、１８０度を僅かに超える周長に亙って延在する曲率半径の大きな径方向外方へ凸の第１円弧部４ｂ１と、第１円弧部４ｂ１の両端から略６０度の周長に亙って延在する曲率半径の小さな径方向外方へ凸の一対の第２円弧部４ｂ２と、前記一対の第２円弧部４ｂ２に挟まれて略６０度の周長に亙って延在する第１円弧部４ｂ１と略同一曲率半径の径方向内方へ凸の第３円弧４ｂ３とで形成されている。第１一円弧部４ｂ１、第２円弧部４ｂ２、第３円弧４ｂ３は互いに滑らかに接続している。第１円弧部４ｂ１の深さは全長に亙って一定であり、第２円弧部４ｂ２と第３円弧４ｂ３の深さは第３円弧４ｂ３の延在方向中央部へ向けて第１円弧部４ｂ１の深さから連続的に漸減し、第３円弧４ｂ３の延在方向中央部が最も浅くなっている。
図３に示すように、揺動弁３ｃは、偏平直方体の弁体３ｃ１と、弁体３ｃ１に埋め込まれた合成ゴム製の弁ディスク３ｃ２と、弁体３ｃ１の一端に形成された先端が球形のカムロッド３ｃ３と、弁体３ｃ１の他端に形成された先端が半円形断面の軸部３ｃ４とを有している。軸部３ｃ４は延在方向に２分割されており、２つの半部分３ｃ４’の間に隙間Ｓが形成されている。揺動弁３ｄ、３ｅ、３ｆは揺動弁３ｃと同一構造である。
図１に示すように、ケーシングの底壁に、流出口２ｃ、２ｄ、２ｅ、２ｆに対峙して軸受５ｃ、５ｄ、５ｅ、５ｆが形成されている。軸受５ｃは、Ｕ溝５ｃ１を有している。軸受５ｃは延在方向に２分割されており、２つの半部分の間に隙間が形成されている。軸受５ｄ、５ｅ、５ｆは軸受５ｃと同一構造である。
ケーシングの底壁に、流出口２ｃ、２ｄ、２ｅ、２ｆに対峙してリブ６ｃ、６ｄ、６ｅ、６ｆが形成されている。リブ６ｃ、６ｄ、６ｅ、６ｆは、軸受５ｃ、５ｄ、５ｅ、５ｆの半部分の間の隙間と、揺動弁３ｃ、３ｄ、３ｅ、３ｆの軸部の半部分の間の隙間とに介在し、揺動弁３ｃ、３ｄ、３ｅ、３ｆの軸部の半部分に摺動可能に当接している。 As shown in FIG. 1, in the flow path switching valve 1, a shaft insertion hole 2a is formed in the top wall, an inflow port 2b is formed in the bottom wall, and four outflow ports 2c, 2d, 2e are equally spaced in the circumferential wall. , And 2f are formed, and a cylindrical casing 2 having a top wall and a bottom wall, and swing valves 3c, 3d, 3e disposed in the casing 2 for opening and closing the outlets 2c, 2d, 2e, 2f. , 3f, and a rotary cam 4 which is engaged with the rocking valves 3c, 3d, 3e, 3f to rock the rocking valves 3c, 3d, 3e, 3f. One end of the rotation shaft 4a of the rotation cam 4 is inserted into the shaft insertion hole 2a of the top of the casing, and the other end is rotatably supported by the casing bottom wall.
As shown in FIG. 2, an annular cam groove 4 b is formed on the bottom surface of the rotating cam 4. Annular cam groove 4b includes a first arcuate portion 4b 1 of the large radially outward projecting to a radius of curvature that extends over a circumferential length greater than 180 degrees slightly, substantially from the first opposite ends of the arcuate portions 4b 1 60 degrees and the perimeter of curvature second arcuate portion 4b 2 smaller diameter direction outwardly convex pair of radii extending over the, in substantially 60 degrees are sandwiched between the pair of second arcuate portion 4b 2 It is formed with a first arcuate portion 4b 1 and the third arc 4b 3 convex radially inward of the substantially same radius of curvature extending over the circumference. The first first arc portion 4b 1 , the second arc portion 4b 2 , and the third arc 4b 3 are smoothly connected to one another. The depth of the first circular arc portion 4b 1 is constant over the entire length, a second arcuate portion 4b 2 depth of the third arc 4b 3 is first toward the extending direction central portion of the third circular arc 4b 3 1 arc portion 4b continuously decreasing from a depth of 1, the extending direction central portion of the third arc 4b 3 becomes shallowest.
As shown in FIG. 3, Yuradoben 3c includes a valve body 3c 1 of the flat rectangular parallelepiped, and the valve disc 3c 2 made of synthetic rubber which is embedded in the valve body 3c 1, formed at one end of the valve body 3c 1 tip and cam rod 3c 3 spherical tip formed at the other end of the valve body 3c 1 has a shaft portion 3c 4 of semi-circular cross-section. Shank 3c 4 is divided into two parts in the extending direction, a gap S is formed between the two halves 3c 4 '. The rocking valves 3d, 3e and 3f have the same structure as the rocking valve 3c.
As shown in FIG. 1, bearings 5c, 5d, 5e, 5f are formed on the bottom wall of the casing, facing the outlets 2c, 2d, 2e, 2f. Bearing 5c has a U groove 5c 1. The bearing 5c is divided into two in the extending direction, and a gap is formed between the two halves. The bearings 5d, 5e, 5f have the same structure as the bearing 5c.
At the bottom wall of the casing, ribs 6c, 6d, 6e, 6f are formed facing the outlets 2c, 2d, 2e, 2f. The ribs 6c, 6d, 6e, 6f intervene in the gaps between the bearing 5c, 5d, 5e, 5f and in the gaps between the pivoting valve halves 3c, 3d, 3e, 3f. The sliding valves 3c, 3d, 3e, and 3f are slidably in contact with one half of the shaft portion.

図１、２に示すように、揺動弁３ｃのカムロッド３ｃ３が、カム溝の第１円弧部４ｂ１の延在方向中央部に係合しており、軸部３ｃ４の２つの半部分３ｃ４’が、軸受５ｃのＵ溝５ｃ１の２つの半部分に係合している。リブ６ｃは、軸部３ｃ４の２つの半部分３ｃ４’の間の隙間Ｓに介在し、２つの半部分３ｃ４’に対して相対摺動可能に当接している。カムロッド３ｃ３は、カム溝４ｂ１の底面と内外周側面とに当接しており、カム溝４ｂ１の底面から軸受５ｃ方向へ付勢され、カム溝４ｂ１の内周側面から径方向外方へ付勢されている。この結果、揺動弁３ｃは、軸受５ｃに押し付けられると共に、軸部３ｃ４回りに径方向外方へ揺動し、弁ディスク３ｃ２を流出口２ｃ周囲のケーシング２内周側面が形成する弁座に押し付け、流出口２ｃを閉鎖している。
図１、２に示すように、揺動弁３ｄ、３ｆのカムロッド３ｄ３、３ｆ３はカム溝の第１円弧部４ｂ１の延在方向両端部の一方と他方とに係合しており、それぞれの軸部の２つの半部分が、軸受５ｄ、５ｆのＵ溝の２つの半部分に係合している。リブ６ｄ、６ｆは、揺動弁３ｄ、３ｆの軸部の２つの半部分の間の隙間に介在し、前記半部分に対して相対摺動可能に当接している。カムロッド３ｄ３、３ｆ３は、カム溝４ｂ１の底面と内外周側面とに当接しており、カム溝４ｂ１の底面から軸受５ｄ、５ｆ方向へ付勢され、カム溝４ｂ１の内周側面から径方向外方へ付勢されている。この結果、揺動弁３ｄ、３ｆは、軸受５ｄ、５ｆに押し付けられると共に、軸部回りに径方向外方へ揺動し、弁ディスクを流出口２ｄ、２ｆ周囲のケーシング内周側面が形成する弁座に押し付け、流出口２ｄ、２ｆを閉鎖している。
図１、２に示すように、揺動弁３ｅのカムロッド３ｅ３は、カム溝の第３円弧部４ｂ３の延在方向中央部に係合しており、軸部の２つの半部分が、軸受５ｅのＵ溝の２つの半部分に係合している。リブ６ｅは、揺動弁３ｅの軸部の２つの半部分の間の隙間に介在し、前記２つの半部分に対して相対摺動可能に当接している。カムロッド３ｅ３は、カム溝４ｂ３の底面と内外周側面とに当接しており、カム溝４ｂ３の底面から軸受５ｅ方向へ付勢され、カム溝４ｂ３の外周側面から径方向内方へ付勢されている。この結果、揺動弁３ｅは、軸受５ｅに押し付けられると共に、軸部回りに径方向内方へ揺動し、弁ディスクを流出口２ｅ周囲のケーシング内周側面が形成する弁座から遠ざけて、流出口２ｅを開放している。
揺動弁３ｃ、３ｄ、３ｅ、３ｆの上記作動により、流路切換弁１は、流入口２ｂを流出口２ｅに連通させている。 As shown in FIGS. 1 and 2, the cam rods 3c 3 of Yuradoben 3c, is engaged with the first extending direction central portion of the arc portion 4b 1 of the cam groove, the two halves of the shaft portion 3c 4 3c 4 'are engaged in the two halves of the U-groove 5c 1 of the bearing 5c. The rib 6c is interposed in the gap S between the two halves 3c 4 'of the shank 3c 4 and abuts against the two halves 3c 4 ' so as to be relatively slidable. Cam rod 3c 3 is in contact on the inner periphery side and the bottom surface of the cam groove 4b 1, is urged from the bottom of the cam groove 4b 1 the bearing 5c direction, radially outward from the inner peripheral surface of the cam groove 4b 1 It is biased to. As a result, the rocking valve 3c is pressed against the bearing 5c, and is rocked radially outward around the shaft 3c 4 so that the valve disc 3c 2 is formed by the inner peripheral side surface of the casing 2 around the outlet 2c. It is pressed against the seat and the outlet 2c is closed.
As shown in FIGS. 1 and 2, the cam rods 3d 3 and 3f 3 of the rocking valves 3d and 3f are engaged with one and the other of both end portions in the extending direction of the first arc portion 4b 1 of the cam groove, The two halves of each shank engage in the two halves of the U-grooves of the bearings 5d, 5f. The ribs 6d and 6f intervene in the gap between the two halves of the stems of the oscillating valves 3d and 3f, and abut on the halves relatively slidably. Cam rod 3d 3, 3f 3 is in contact on the inner periphery side and the bottom surface of the cam groove 4b 1, is urged from the bottom of the cam groove 4b 1 bearing 5d, the 5f direction, the inner peripheral surface of the cam groove 4b 1 It is biased radially outward from. As a result, the rocking valves 3d and 3f are pressed against the bearings 5d and 5f, and are rocked outward in the radial direction around the shaft portion, and the valve disc is formed by the casing inner circumferential side surface around the outlets 2d and 2f. The valve seat is pressed, and the outlets 2d and 2f are closed.
As shown in FIGS. 1 and 2, the cam rods 3e 3 of Yuradoben 3e is engaged with the third extending direction central portion of the arcuate portion 4b 3 of the cam groove, the two halves of the shaft portion, It engages with the two halves of the U groove of the bearing 5e. The rib 6e intervenes in the gap between the two halves of the shaft of the swing valve 3e and abuts against the two halves in a relatively slidable manner. Cam rod 3e 3 is in contact on the inner periphery side and the bottom surface of the cam groove 4b 3, is biased from the bottom of the cam groove 4b 3 the bearing 5e direction, radially inward from the outer peripheral side surface of the cam groove 4b 3 It is energized. As a result, the rocking valve 3e is pressed against the bearing 5e, and is rocked radially inward around the shaft to move the valve disc away from the valve seat formed by the casing inner circumferential surface around the outlet 2e, The outlet 2e is open.
The flow path switching valve 1 makes the inflow port 2b communicate with the outflow port 2e by the above operation of the rocking valves 3c, 3d, 3e, 3f.

回転カム４の回転軸４ａを図示しないモータで回転駆動し、カム４を図２の状態から回転させると、カムロッド３ｃ３、３ｄ３、３ｅ３、３ｆ３が、カム溝４ｂの底面と内外周側面とに当接しつつカム溝４ｂに対して相対移動する。
カムロッド３ｃ３、３ｄ３、３ｅ３、３ｅ３は、カム溝の第１円弧部４ｂ１と係合している時は、カム溝内周側面から径方向外方へ付勢される。カムロッド３ｃ３、３ｄ３、３ｅ３、３ｅ３が、第３円弧部４ｂ３へ向けて移動しつつ第２円弧部４ｂ２と係合している時は、カム溝内周側面から径方向外方への付勢力が漸減すると共にカム溝外周側面から径方向内方への付勢力が漸増し、カム溝の第３円弧部４ｂ３と係合している時は、カム溝外周側面から径方向内方へ付勢され、第１円弧部４ｂ１へ向けて移動しつつ第２円弧部４ｂ２と係合している時は、カム溝外周側面から径方向内方への付勢力が漸減すると共にカム溝内周側面から径方向外方への付勢力が漸増する。
カム溝４ｂの深さは、第１円弧部４ｂ１から第３円弧部４ｂ３の延在方向中央部へ向けて漸減しているので、図１から分かるように、カムロッド３ｃ３、３ｄ３、３ｅ３、３ｆ３が、カム溝４ｂ内を第１円弧部４ｂ１から第２円弧部４ｂ２を経由して第３円弧部４ｂ３の延在方向中央部へ向けて相対移動する時は、揺動弁３ｃ、３ｄ、３ｅ、３ｆは、カムロッド３ｃ３、３ｄ３、３ｅ３、３ｆ３をカム溝４ｂの底面に当接させ、軸部を軸受５ｃ、５ｄ、５ｅ、５ｆのＵ溝底面に当接させつつ、立った状態から次第に寝た状態へ揺動し、カムロッド３ｃ３、３ｄ３、３ｅ３、３ｆ３が、第３円弧部４ｂ３の延在方向中央部から第２円弧部４ｂ２を経由して第１円弧部４ｂ１へ向けて相対移動する時は、揺動弁３ｃ、３ｄ、３ｅ、３ｆは、カムロッド３ｃ３、３ｄ３、３ｅ３、３ｆ３をカム溝４ｂの底面に当接させ、軸部を軸受５ｃ、５ｄ、５ｅ、５ｆのＵ溝底面に当接させつつ、寝た状態から次第に立った状態へ揺動する。
カム４を図２の状態から時計回りに９０度回転させると、カムロッド３ｃ３、３ｄ３、３ｅ３が、カム溝の第１円弧部４ｂ１に係合し、カムロッド３ｆ３がカム溝の第３円弧部４ｂ３の延在方向中央部に係合する。この結果、流出口２ｃ、２ｄ、２ｅが閉鎖され、流出口２ｆが開放される。
回転カム４の回転軸４ａを図示しないモータで回転駆動し、カム４を時計回りに更に９０度回転させると、カムロッド３ｄ３、３ｅ３、３ｆ３が、カム溝の第１円弧部４ｂ１に係合し、カムロッド３ｃ３がカム溝の第３円弧部４ｂ３の延在方向中央部に係合する。この結果、流出口２ｄ、２ｅ、２ｆが閉鎖され、流出口２ｃが開放される。
回転カム４の回転軸４ａを図示しないモータで回転駆動し、カム４を時計回りに更に９０度回転させると、カムロッド３ｅ３、３ｆ３、３ｃ３が、カム溝の第１円弧部４ｂ１に係合し、カムロッド３ｄ３がカム溝の第３円弧部４ｂ３の延在方向中央部に係合する。この結果、流出口２ｅ、２ｆ、２ｃが閉鎖され、流出口２ｄが開放される。
上記説明から分かるように、流路切換弁１においては、回転カム４を回転駆動することにより、流出口を切り換えることができる。 And rotated by a motor (not shown) the rotation shaft 4a of the rotating cam 4, to rotate the cam 4 from the state shown in FIG. 2, cam rods 3c 3, 3d 3, 3e 3 , 3f 3 comprises a bottom surface of the cam groove 4b inner and outer It moves relative to the cam groove 4b while in contact with the side surface.
Cam rod 3c 3, 3d 3, 3e 3 , 3e 3 , when engaged with the first arc portion 4b 1 of the cam groove is urged from the cam groove circumferential surface radially outward. Cam rod 3c 3, 3d 3, 3e 3, 3e 3 is when engaged with the second arcuate portion 4b 2 while moving toward the third arc portion 4b 3 is radially outward from the cam groove peripheral side surface The biasing force gradually decreases while the biasing force inward radially from the outer peripheral surface of the cam groove gradually increases, and when engaged with the third circular arc portion 4b 3 of the cam groove, the diameter from the outer peripheral surface of the cam groove are urged inwardly, when engaged with the second arcuate portion 4b 2 while moving toward the first arcuate portion 4b 1, the biasing force of the radially inward from the cam groove outer circumferential surface gradually decreasing At the same time, the biasing force radially outward from the inner peripheral side of the cam groove gradually increases.
The depth of the cam groove 4b is so gradually decreases toward the first arcuate portion 4b 1 to the third arc portion 4b extending direction central portion of the 3, as can be seen from Figure 1, the cam rod 3c 3, 3d 3, when 3e 3, 3f 3 is relatively moved toward the third arc portion 4b extending direction central portion of the 3 via the inside of the cam groove 4b from the first arcuate portion 4b 1 second arcuate portion 4b 2 is Yuradoben 3c, 3d, 3e, 3f is cam rod 3c 3, 3d 3, 3e 3 , 3f 3 to abut the bottom surface of the cam groove 4b, bearing 5c of the shaft portion, 5d, 5e, 5f of the U groove bottom surface The cam rods 3c 3 , 3d 3 , 3e 3 , and 3f 3 are gradually swung from the standing state to the lying state while being in contact with the second arc portion from the central portion in the extension direction of the third arc portion 4b 3. via 4b 2 when relative movement towards the first arc portion 4b 1 is Yuradoben 3c, 3d, e, 3f is a cam rod 3c 3, 3d 3, 3e 3 , 3f 3 is abutted against the bottom surface of the cam groove 4b, bearing 5c of the shaft portion, 5d, 5e, while in contact with the U-groove bottom of 5f, sleeping It gradually swings to the standing position.
When the cam 4 is rotated 90 degrees clockwise from the state of FIG. 2, the cam rods 3c 3 3d 3 and 3e 3 engage with the first arc portion 4b 1 of the cam groove, and the cam rod 3f 3 is the third of the cam groove 3 engages the extending direction central portion of the arcuate portion 4b 3. As a result, the outlets 2c, 2d and 2e are closed, and the outlet 2f is opened.
When the rotary shaft 4a of the rotary cam 4 is rotationally driven by a motor (not shown) and the cam 4 is further rotated 90 degrees clockwise, the cam rods 3d 3 3e 3 3f 3 are moved to the first arc portion 4b 1 of the cam groove. engaged, the cam rod 3c 3 is engaged with the third extending direction central portion of the arcuate portion 4b 3 of the cam groove. As a result, the outlets 2d, 2e, 2f are closed, and the outlet 2c is opened.
Was rotated at unillustrated rotation shaft 4a of the rotating cam 4 motor, the cam 4 is rotated further 90 degrees clockwise, the cam rod 3e 3, 3f 3, 3c 3 is the first arc portion 4b 1 of the cam groove engaged, the cam rod 3d 3 is engaged with the third extending direction central portion of the arcuate portion 4b 3 of the cam groove. As a result, the outlets 2e, 2f, 2c are closed, and the outlet 2d is opened.
As understood from the above description, in the flow path switching valve 1, the outlet can be switched by rotationally driving the rotating cam 4.

本実施例に係る流路切換弁１に於いては、回転カム４を用いて揺動弁３ｃ、３ｄ、３ｅ、３ｆを揺動駆動して、流出口２ｃ、２ｄ、２ｅ、２ｆを開閉している。バネを使用しないので、従来に比べて部材数が低減し、作動が安定している。
回転カム４の環状のカム溝４ｂにカムロッド３ｃ３、３ｄ３、３ｅ３、３ｆ３を係合させることにより、揺動弁３ｃ、３ｄ、３ｅ、３ｆを開閉方向に揺動駆動できる。
本実施例に係る流路切換弁１に於いては、揺動弁３ｃ、３ｄ、３ｅ、３ｆのカムロッド３ｃ３、３ｄ３、３ｅ３、３ｆ３をカム溝４ｂの底面に常時当接させ、軸部を軸受５ｄ、５ｄ、５ｅ、５ｆのＵ溝の底面に常時当接させているので、カム溝４ｂと軸受５ｄ、５ｄ、５ｅ、５ｆのＵ溝とで揺動弁３ｃ、３ｄ、３ｅ、３ｆを常時挟持して、揺動弁３ｃ、３ｄ、３ｅ、３ｆを安定的に作動させることができる。
本実施例に係る流路切換弁１に於いては、揺動弁３ｃ、３ｄ、３ｅ、３ｆの軸部と軸受５ｃ、５ｄ、５ｅ、５ｆを、それぞれ延在方向に２分割し、揺動弁と軸受の２つの半部分の間の隙間に介在し、揺動弁の２つの半部分に対して相対摺動可能に当接するリブ６ｃ、６ｄ、６ｅ、６ｆをケーシングに形成したので、単一の部材であるリブ６ｃ、６ｄ、６ｅ、６ｆで揺動弁３ｃ、３ｄ、３ｅ、３ｆを軸部の延在方向に位置決めできている。
環状のカム溝４ｂの内周側面はカムロッド３ｃ３、３ｄ３、３ｅ３、３ｅ３を径方向外方へ付勢し、ひいては揺動弁３ｃ、３ｄ、３ｅ、３ｆを閉弁方向に付勢して弁座に押し当てる。環状のカム溝４ｂの外周側面はカムロッド３ｃ３、３ｄ３、３ｅ３、３ｆ３を径方向内方へ付勢し、ひいては揺動弁３ｃ、３ｄ、３ｅ、３ｆを開弁方向に付勢する。環状のカム溝４ｂの内周側面がカムロッド３ｃ３、３ｄ３、３ｅ３、３ｆ３を径方向外方へ付勢し、ひいては揺動弁３ｃ、３ｄ、３ｅ、３ｆを閉弁方向に付勢して弁座に押し当てているカム溝４ｂの周方向領域、即ち第１円弧部４ｂ１では、揺動弁３ｃ、３ｄ、３ｅ、３ｆの閉弁方向の揺動は弁座によって規制されるので、カム溝の外周側面ひいては外周側壁は不要である。第１円弧部４ｂ１の外周側壁を切り欠くことにより、カム４の構造が簡素化され、ひいては流路切換弁１の構造が簡素化される。
上記実施例では、流路切換弁１を４方弁として構成したが、流出口２ｃ、２ｄ、２ｅ、２ｆの何れか１つを恒久的に閉鎖すれば、流路切換弁１は３方弁になり、流出口２ｃ、２ｄ、２ｅ、２ｆの何れか２つを恒久的に閉鎖すれば、流路切換弁１は２方弁になる。
回転カム４の形状を変更し、或いは回転カム４の形状と流入出口の配置とを変更すれば、上記実施例とは異なる種々の流路切換えを実現できる。
図３（ｄ）に示すように、揺動弁３ｃの弁ディスク３ｃ２をＯリング３ｃ２’に置換しても良い。揺動弁３ｄ、３ｅ、３ｆに就いても同様である。
回転カム駆動用モータは、ステッピングモータ、ギャードモータ等を使用可能である。 In the flow path switching valve 1 according to the present embodiment, the rocking valves 3c, 3d, 3e and 3f are driven to rock by using the rotary cam 4, and the outlets 2c, 2d, 2e and 2f are opened and closed. ing. Since no spring is used, the number of members is reduced as compared with the prior art, and the operation is stable.
By engaging the cam rod 3c 3, 3d 3, 3e 3 , 3f 3 in an annular cam groove 4b of the rotating cam 4, Yuradoben 3c, 3d, 3e, 3f can swing driving the opening and closing direction.
In the flow path switching valve 1 according to this embodiment, Yuradoben 3c, 3d, 3e, 3f of the cam rod 3c 3, 3d 3, 3e 3 , 3f 3 was in contact at all times on the bottom of the cam groove 4b, Since the shaft portion is always in contact with the bottom of the U groove of the bearings 5d, 5d, 5e, 5f, the cam groove 4b and the U grooves of the bearings 5d, 5d, 5e, 5f cause the oscillating valves 3c, 3d, 3e , 3f can be held constantly, and the rocking valves 3c, 3d, 3e, 3f can be operated stably.
In the flow path switching valve 1 according to the present embodiment, the shaft portion of the rocking valves 3c, 3d, 3e, 3f and the bearings 5c, 5d, 5e, 5f are each divided into two in the extending direction and rocked. Since the ribs 6c, 6d, 6e, 6f which intervene in the gap between the valve and the two halves of the bearing and abut against the two halves of the rocking valve in a relative slidable manner are formed on the casing, The swing valves 3c, 3d, 3e, 3f can be positioned in the extending direction of the shaft by the ribs 6c, 6d, 6e, 6f which are one member.
Inner peripheral surface of the annular cam groove 4b is urged cam rods 3c 3, 3d 3, 3e 3 , 3e 3 radially outward and urges therefore Yuradoben 3c, 3d, 3e, 3f and the valve closing direction Then press it against the valve seat. The outer peripheral side surface of the annular cam groove 4b urges the cam rods 3c 3 3d 3 3e 3 3f 3 radially inward, and thus urges the rocking valves 3c 3d 3e 3f in the valve opening direction. . Inner peripheral surface of the annular cam groove 4b is urged cam rods 3c 3, 3d 3, 3e 3 , 3f 3 radially outward and urges therefore Yuradoben 3c, 3d, 3e, 3f and the valve closing direction is regulated by the peripheral region, i.e. the first arc portion 4b 1, Yuradoben 3c, 3d, 3e, the oscillation of the closing direction of the 3f valve seat of the cam grooves 4b are pressed against the valve seat and Therefore, the outer peripheral side surface of the cam groove and hence the outer peripheral side wall is unnecessary. By cutting the first outer periphery side wall of the arcuate portion 4b 1, the structure of the cam 4 is simplified, and hence the structure of the flow path switching valve 1 is simplified.
In the above embodiment, although the flow path switching valve 1 is configured as a four-way valve, if any one of the outlets 2c, 2d, 2e, and 2f is permanently closed, the flow path switching valve 1 is a three-way valve. When the outlet 2c, 2d, 2e, 2f is permanently closed, the flow path switching valve 1 becomes a two-way valve.
By changing the shape of the rotating cam 4 or changing the shape of the rotating cam 4 and the arrangement of the inlet and outlet, it is possible to realize various flow path switching different from the above embodiment.
As shown in FIG. 3 (d), it may be replaced with the valve disc 3c 2 of Yuradoben 3c to O-ring 3c 2 '. The same applies to the rocking valves 3d, 3e and 3f.
A stepping motor, a geared motor or the like can be used as the rotation cam drive motor.

本発明は、流路切換弁に広く利用可能である。   The present invention is widely applicable to flow path switching valves.

１ 流路切換弁
２ ケーシング
２ｂ 流入口
２ｃ、２ｄ、２ｅ、２ｆ 流出口
３ｃ、３ｄ、３ｅ、３ｆ 揺動弁
４ カム
４ｂ カム溝
５ｃ、５ｄ、５ｅ、５ｆ 軸受
６ｃ、６ｄ、６ｅ、６ｆ リブ DESCRIPTION OF SYMBOLS 1 flow-path switching valve 2 casing 2b inlet 2c, 2d, 2e, 2f outlet 3c, 3d, 3e, 3f rocking valve 4 cam 4b cam groove 5c, 5d, 5e, 5f bearing 6c, 6d, 6e, 6f rib

Claims (5)

流入口と複数の流出口とが形成されたケーシングと、ケーシング内に配設されて流出口を開閉する複数の揺動弁と、前記複数の揺動弁に係合して揺動弁を揺動駆動する回転カムとを備えることを特徴とする流路切換弁。 A casing having an inlet and a plurality of outlets, a plurality of rocking valves disposed in the casing for opening and closing the outlets, and the plurality of rocking valves engaged to rock the rocking valves What is claimed is: 1. A flow path switching valve comprising: a rotationally driven rotary cam. 回転カムは環状のカム溝を備え、揺動弁は前記カム溝に係合するカムロッドを備えることを特徴とする請求項１に記載の流路切換弁。 The flow control valve according to claim 1, wherein the rotating cam includes an annular cam groove, and the swing valve includes a cam rod engaged with the cam groove. 環状のカム溝の外周側壁の一部が切り欠かれていることを特徴とする請求項２に記載の流路切換弁。 The flow passage switching valve according to claim 2, wherein a part of the outer peripheral side wall of the annular cam groove is cut out. ケーシングが備えるＵ溝を有する軸受と、揺動弁が有し軸受のＵ溝に嵌合する軸部とによって、揺動弁の軸支部が形成されており、カムロッドはカム溝の底面に常時当接し、軸部はＵ溝の底面に常時当接することを特徴とする請求項２又は３に記載の流路切換弁。 The pivot support portion of the swing valve is formed by the bearing having the U groove provided in the casing and the shaft portion of the swing valve and fitted in the U groove of the bearing, and the cam rod is always in contact with the bottom of the cam groove. 4. The flow passage switching valve according to claim 2, wherein the shaft portion is in contact with the bottom surface of the U groove at all times. 軸受と軸部とは、延在方向に２分割されており、２つの半部分の間の隙間に相対摺動可能に嵌合するリブがケーシングに形成されていることを特徴とする請求項４に記載の流路切換弁。 The bearing and the shaft portion are divided into two in the extending direction, and a rib is formed on the casing so as to be relatively slidably fitted in the gap between the two half portions. The channel switching valve as described in.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS481220U (en) * 1971-06-03 1973-01-09
JPS4847511U (en) * 1971-10-06 1973-06-22
CN1563760A (en) * 2004-03-16 2005-01-12 曹建钢 Plane sealed 3-way valve
JP2013044410A (en) * 2011-08-25 2013-03-04 Fuji Koki Corp Flow path switching valve
US20170145896A1 (en) * 2015-11-19 2017-05-25 Hyundai Motor Company Engine system having coolant control valve

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4847511B2 (en) 2008-12-03 2011-12-28 三菱農機株式会社 Clutch operating device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS481220U (en) * 1971-06-03 1973-01-09
JPS4847511U (en) * 1971-10-06 1973-06-22
CN1563760A (en) * 2004-03-16 2005-01-12 曹建钢 Plane sealed 3-way valve
JP2013044410A (en) * 2011-08-25 2013-03-04 Fuji Koki Corp Flow path switching valve
US20170145896A1 (en) * 2015-11-19 2017-05-25 Hyundai Motor Company Engine system having coolant control valve

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