JP2004108419A - Gasket and multiple string valve equipped with gasket - Google Patents

Gasket and multiple string valve equipped with gasket Download PDF

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Publication number
JP2004108419A
JP2004108419A JP2002269354A JP2002269354A JP2004108419A JP 2004108419 A JP2004108419 A JP 2004108419A JP 2002269354 A JP2002269354 A JP 2002269354A JP 2002269354 A JP2002269354 A JP 2002269354A JP 2004108419 A JP2004108419 A JP 2004108419A
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Japan
Prior art keywords
passage
gasket
fluid
pressure
bolt
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JP2002269354A
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JP4159837B2 (en
Inventor
Jun Okano
岡野 順
Shuhei Miki
三木 州平
Kensuke Ioku
井奥 賢介
Hitoshi Segawa
瀬川 均
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Nabco Ltd
Japan Metal Gasket Co Ltd
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Nabco Ltd
Japan Metal Gasket Co Ltd
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Application filed by Nabco Ltd, Japan Metal Gasket Co Ltd filed Critical Nabco Ltd
Priority to JP2002269354A priority Critical patent/JP4159837B2/en
Priority to IT000701A priority patent/ITTO20030701A1/en
Priority to KR1020030064392A priority patent/KR100662529B1/en
Publication of JP2004108419A publication Critical patent/JP2004108419A/en
Priority to KR1020060036777A priority patent/KR100633802B1/en
Priority to KR1020060036778A priority patent/KR100633803B1/en
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Publication of JP4159837B2 publication Critical patent/JP4159837B2/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16JPISTONS; CYLINDERS; SEALINGS
    • F16J15/00Sealings
    • F16J15/02Sealings between relatively-stationary surfaces
    • F16J15/021Sealings between relatively-stationary surfaces with elastic packing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/02Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S277/00Seal for a joint or juncture

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Valve Housings (AREA)
  • Gasket Seals (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To reduce fluid leakage even if working fluid is at a high pressure. <P>SOLUTION: A gasket 2 is arranged between connecting faces of two members (11 to 19) providing a fluid passage communicating with each other, respectively. There are provided with a port 51 for a low pressure passage installed in the position opposed to a passage 22 for low pressure fluid of members (11 to 19), and ports (52 to 55) for high pressure passages installed in the position opposed to passages (23 to 24) for high pressure fluid of the members (11 to 19) through which the fluid of pressure higher than that of the fluid flowing through the port for low pressure fluid flows. The port 51 for the low pressure passage and the ports (52 to 55) for the high pressure passage are surrounded with a continuous and identical bead 56. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、互いに連通される流体通路をそれぞれ備える2つの部材の接続面間に配置されるガスケット、および、互いに連通される流体通路をそれぞれ備える複数のバルブが連設され、バルブの各接続面間にガスケットが配設されたガスケットを備える多連弁に関する。
【0002】
【従来の技術】
互いに連通される流体通路をそれぞれ備える2つの部材の接続面間にガスケットが配置され、接続面間からの流体の漏れ防止が図られる場合がある。例えば、2つの隣り合うバルブの各接続面間にガスケットが配置されるような場合である。このように、バルブ等の間にガスケットが設けられるものとしては、下記特許文献1に記載されたものがある。
【0003】
しかしながら、下記特許文献1に記載のガスケットを2つの部材の接続面間に適用する場合、適用対象の部材が、例えば建設機械用のバルブ等のように、高圧の作動流体を用いるものであると(建機用バルブの場合、25MPa程度の高圧油が用いられることが多い)、作動流体が漏れることが懸念される。また、互いに連通される流体通路をそれぞれ備える複数のバルブが連設される多連弁、例えば建機用の多連弁においては、各バルブの各接続面に開口する通路の位置は、各接続面毎に異なることが多く、それぞれの接続面の形状に合わせて多数の種類のガスケットが製作される必要がある。
【0004】
また、各部材の接続面に対してガスケットの位置決めを行う必要があるが、かかる位置決め機構として、下記特許文献2や下記特許文献3に記載されたものがある。これらは、ガスケット側に位置決め用の突設部を設けるとともに、部材側にもガスケットの突設部と嵌め合う凹部を形成することで位置決めするものである。しかし、これらの位置決め機構によると、部材側にも加工が必要であり、工数の増加を招き複雑な構造となる。
【0005】
【特許文献1】
特開平3−189487号公報
【特許文献2】
特開平11−351395号公報
【特許文献3】
特開平5−346168号公報
【0006】
【発明が解決しようとする課題】
本発明は、上記実情に鑑みることにより、互いに連通される流体通路を備える2つの部材の接続面間に配置されるガスケットにおいて、作動流体が高圧であっても流体漏れを低減できることを目的とする。また、連設されるバルブの各接続面間にガスケットが配設される多連弁において、ガスケットの種類を削減することを目的とする。また、加工が容易な位置決め機構を備えるガスケット、およびガスケットを備える多連弁を提供することを目的とする。
【0007】
【課題を解決するための手段】
上記課題を解決する請求項1に記載のガスケットは、互いに連通される流体通路をそれぞれ備える2つの部材の接続面間に配置されるガスケットであって、前記部材の低圧流体用通路と対向する位置に設けられる低圧通路用孔と、前記低圧流体用通路を流動する流体よりも高圧の流体が流動する前記部材の高圧流体用通路に対向する位置に設けられる高圧通路用孔と、を備え、前記低圧通路用孔と前記高圧通路用孔とが連続する同一のビードで囲まれていることを特徴とする。
ここで、ビードとは、平らな部分よりも***して形成された部分である。
この構成によると、ビードでは接触面圧が高いため、高圧流体用通路から流体が漏れても、同一ビードによって高圧通路用孔とともに囲まれた低圧通路用孔を介して低圧流体用通路に流体を戻すことができる。このため、作動流体が高圧であってもビードの外方に流体が漏れることを抑制でき、ガスケットと部材との間での流体漏れを低減できる。
【0008】
請求項2に記載のガスケットは、請求項1において、前記低圧流体用通路と連通する流体逃がし通路が前記高圧通路用孔の近傍から前記ビードに略沿って形成されていることを特徴とする。
この構成によると、ビードの内側に沿う流体逃がし通路によって誘導されて、高圧流体用通路から漏れた流体が低圧流体用通路に戻りやすくなり、ガスケットと部材との間での流体漏れをさらに低減できる。
【0009】
請求項3に記載のガスケットは、互いに連通される流体通路をそれぞれ備える2つの部材の接続面間に配置されるガスケットであって、前記部材の通路と対向する位置に設けられる通路用孔を備え、タンクに通じる前記部材のタンク通路に連通する流体逃がし通路が前記通路用孔の近傍まで形成されていることを特徴とする。
この構成によると、流体逃がし通路によって誘導されて、通路から漏れた流体がタンク通路を介しタンクへと戻るため、作動流体が高圧であっても、ガスケットと部材との間での流体漏れを低減することができる。
【0010】
請求項4に記載のガスケットは、請求項3において、前記流体逃がし通路の外周に沿ってビードが配置されていることを特徴とする。
この構成によると、ビードの外方に流体が漏れることを抑制し、通路から漏れた流体を流体逃がし通路に沿ってタンクに戻すことができる。そして、通路から漏れた流体の圧力は流体逃がし通路にて低下し、ビードに作用する流体圧力も低くなるため、ガスケットと部材との間での流体漏れをさらに低減できる。
【0011】
請求項5に記載のガスケットを備える多連弁は、互いに連通される流体通路をそれぞれ備える複数のバルブが連設される多連弁であって、前記複数のバルブにおける隣り合うバルブの各接続面間にはそれぞれガスケットが配置され、前記各バルブの各接続面に開口する各通路が、ほぼ同一位置、または、所定間隔を隔てた位置で開口し、前記ガスケットには、前記各バルブの前記各通路と対向する位置に通路用孔が形成されていることを特徴とする。
この構成によると、各接続面間に配置されるガスケットの形状を共通化できるため、ガスケットの種類を削減できる。
【0012】
請求項6に記載のガスケットは、互いに連通される流体通路をそれぞれ備える2つの部材の接続面間に配置されるガスケットであって、前記部材の通路と対向する位置に設けられる通路用孔と、前記部材を連結するボルトが挿通されるボルト孔と対向する位置に設けられるボルト用孔と、前記ボルト孔に係合可能な爪部と、を備え、前記爪部は、前記ボルトと前記ボルト孔との隙間に挿入可能に折り曲げられることを特徴とする。
この構成によると、爪部をボルト穴に係合させることで、部材の接続面に対して位置決めすることができ、部材の通路とガスケットの通路用孔とを合わせることができる。即ち、位置決め機構としては、ガスケットに爪部を設けるだけで部材側の加工も必要ないため、加工が容易な位置決め機構を実現できる。
【0013】
請求項7に記載のガスケットを備える多連弁は、互いに連通される流体通路をそれぞれ備える複数のバルブが連設される多連弁であって、前記複数のバルブにおける隣り合うバルブの各接続面間にはそれぞれガスケットが配置され、前記ガスケットは、ビードと、前記バルブの通路と対向する位置に設けられる通路用孔と、前記バルブを連結するボルトが挿通されるボルト孔と対向する位置に設けられるボルト用孔と、前記ボルト孔に係合可能に折り曲げられた爪部と、を備え、前記ボルト孔は、ボルト径よりも大径に形成されており、前記爪部が前記ボルトと前記ボルト孔との間で前記ボルト孔に係合することで、前記バルブの前記各通路と前記ガスケットの前記通路用孔とが対向するように位置決めされることを特徴とする。
この構成によると、ボルトとボルト孔との間に設けられた隙間に爪部が係合することで位置決めされる。即ち、バルブ側に爪部係合用に新たな加工を行う必要も無く、加工が容易な位置決め機構を実現できる。また、ビードや通路用孔が所定の位置に位置決めされ、流体漏れを低減できる。
【0014】
【発明の実施の形態】
以下、本発明の実施の形態を図面を参照しながら説明する。図1は、本実施形態に係るガスケットを備える多連弁1(以下、「多連弁1」という)を示す平面図である。この多連弁1は、例えば、油圧アクチュエータと走行クローラとを備えたミニショベル等の建設機械において、複数のアクチュエータを制御するために用いられるものである。
【0015】
多連弁1は、互いに連通される流体通路(油が流動する通路)をそれぞれ備える複数のバルブ(部材)11〜19が連設されている。また、多連弁1には、図示しない圧油供給ポンプやタンク等と通じるポートブロック(部材)20、21、43も設けられている。そして、複数の部材(バルブ、ブロック)における隣り合う各接続面(11a、12a、12b、13a・・・・・21a、21b、43a)の間には、それぞれガスケット2(2a〜k)が配置されている。
【0016】
図2は、バルブ断面の一例として図1のオーバーロードリリーフ弁を省略したV−V線矢視断面(バルブ19の断面図)を示したものである。バルブ19は、操作レバーと連結したリモコン弁(図示せず)からのパイロット圧により作動するパイロット操作式バルブであり、他のバルブ(11〜18)も略同様な内部構造を備えている。このバルブ19には、他のバルブ等とバルブ連設方向に連通される通路として、タンクに通じるタンク通路22と、圧油供給ポンプと通じる供給通路23及びセンターバイパス通路24と、パイロット圧油が流動するパイロット通路(25〜28、38〜41)とが形成されている。タンク通路22は、大気圧又はタンク圧の10Mpa以下の低圧流体(低圧油)が流動する低圧流体用通路を成しており、供給通路23及びセンターバイパス通路24は、低圧流体用通路を流動する流体(低圧油)よりも高圧の流体(10〜25Mpaの高圧油)が流動する高圧流体用通路を成している。
【0017】
また、バルブ19内には、スプール孔29が設けられ、スプール孔29にスプール30が摺動自在に挿入されている。スプール30の図中左右方向の移動により連通路31、32を介して、供給通路23及びタンク通路22が、アクチュエータと接続するアクチュエータポート33と接続又は遮断される。なお、センターバイパス通路24が遮断されると供給通路23の油圧が上昇し、チェック弁37が押し開かれて連通路31a又は31bと連通される。また、スプール30は、バルブ19の両端部の油圧室34にパイロット通路25からパイロット圧油が供給されることで移動する。他のバルブも略同様に構成されている。なお、パイロット通路38から41については、所定のバルブにおいてスプール内に形成された油路を介して油圧室と連通可能になっている。また、多連弁1は、複数のバルブ(部材)を連結する4本のボルト35を有しており、ボルト35は、ボルト孔36に挿通されている。
【0018】
また、図3は、バルブ端面(接続面)の例として、接続面19a(図3(a))及び接続面13b(図3(b))を示したものである。図3(a)に示すように、接続面19aには、タンク通路22、供給通路23、センターバイパス通路24、ボルト孔36、パイロット通路26〜28及び38〜41が開口している。また、タンク通路22への連通路32(図2参照)と連通している通路42も開口している。そして、図3(b)に示すように、接続面13bには、タンク通路22、供給通路23、センターバイパス通路24、ボルト孔36、パイロット通路28及び39〜41が開口している。また、バルブ15内でタンク通路22への連通路と連通する通路42も開口している。なお、センターバイパス通路24とパイロット通路28、39、41については、開口部分に溝部又は凹部が形成されている様子が図示されている。パイロット通路は各バルブにて各油圧室と連通するため接続面毎に少しずつ異なるものの、他のバルブにおいても図3と略同様の接続面を備えている。このように、多連弁1においては、各バルブの接続面に開口する各通路(22,23、24、25〜28、38〜41)が、ほぼ同一位置、または所定間隔を隔てた位置で開口している。
【0019】
次に、多連弁1のガスケット2であるとともに、本発明の実施形態に係るガスケット2について説明する。図4にガスケット2の平面図を示す。ガスケット2(2a〜2k)は、バルブ(部材)11〜19又はブロック(部材)20、21、43の接続面間に配置される(図1参照)。即ち、図3に示す接続面19aや13b等と面して取り付けられる。このガスケット2には、バルブの低圧流体用通路(タンク通路22)と対向する位置に低圧通路用孔51が設けられている。また、高圧流体用通路である供給通路23及びセンターバイパス通路24にそれぞれ対向する位置に高圧通路用孔52、53が設けられ、多連弁1における他の高圧流体用通路に対向する位置に高圧通路用孔54、55が設けられている。そして、低圧通路用孔51と高圧通路用孔(52〜55)は、連続する同一のビード56で囲まれている。ビード56は、A−A線矢視断面図(図5(a))に示すように、平らな部分よりも***して形成された部分である。この***した角(かど)部56aが接続面に押し付けられることで流体漏れ防止が図られる。また、低圧流体用通路(タンク通路22)と連通する流体逃がし通路51aが、高圧通路用孔の近傍からビード56に略沿って形成されている。また、ビート56は、曲線を含む直線で形成され、囲まれる面積が小さくなるように形成されている。
【0020】
また、ガスケット2には、バルブのパイロット通路(38〜41)と対向する位置に通路用孔群57が設けられている。そして、タンク通路に連通する通路42(図3参照)と連通する流体逃がし通路61が通路用孔群57の近傍まで形成されている。この流体逃がし通路61は、通路用孔群57の大部分を囲むように形成されている。さらに、流体逃がし通路61の外周に沿ってビード62が配置されている。このビード62は、C−C線矢視の一部断面図(図5(c))に示すように、平らな部分よりも***して形成されている。
【0021】
また、多連弁1における他の高圧流体用通路に対向する位置に高圧通路用孔(63〜65)が設けられており、この高圧通路用孔(63〜65)の周囲には、それぞれビード(66〜68)が配置されている。図5(b)に、高圧通路用孔65及びビード68の断面図(B−B線矢視断面図)を示す。また、パイロット通路(25〜28)に対向する位置に、通路用孔(69〜76)が設けられており、通路用孔(69〜72)及び通路用孔(73〜76)が同一のビード77及び78でそれぞれ囲まれている。
【0022】
また、ガスケット2には、バルブのボルト孔36(36a〜d)と対向する位置にボルト用孔79(79a〜d)が設けられている。そして、離れた位置にあるボルト用孔79a及び79dには、ボルト孔36a及び36d(図3参照)に係合可能な爪部80及び81がそれぞれ3つずつボルト用孔79a及び79dの内側に突出するように設けられている。図5(d)に、爪部81(爪部80も同様)の断面図(D−D線矢視断面図)を示す。図5(d)においては、略45°傾斜して形成され、ボルト35a(又は35d)とボルト孔36a(又は36d)との隙間に挿入可能になる。なお、ボルト孔は、ネジ山相当の隙間があり、ボルト径よりも若干大径に形成されているので、これを利用して爪部80及び81を挿入することができる。このように、爪部80及び81が、ボルト35とボルト孔36との間でボルト孔36に係合することで、バルブの各通路とガスケットの通路用孔とが対向するように位置決めされる。また、1つのボルト孔36に対して3箇所の爪部を設けているため、接続面に対するガスケット2の位置ずれを防止できる。
【0023】
以上が、本実施形態に係る多連弁1及びガスケット2についての説明である。このガスケット2によると、作動流体が高圧であっても流体漏れを低減することができる。そして、各バルブの各通路と対向する位置に通路用孔が形成されたガスケットであるため、各通路を囲むOリングを用いる必要がなく、Oリング用の溝を各バルブに加工する必要もない。また、メタルシールではないため、接続面での表面粗度を低下でき、接続面の表面加工が容易となる。さらに、建機用バルブにおいては、複数のパイロット通路を設ける必要があるため、これらを個別にシールすると部品や加工工数の増大を招くことになるが、これを防止できる。そして、多連弁1によると、各接続面間に配置されるガスケットの形状を共通化できるため、ガスケットの種類を削減できる。なお、本実施形態の説明は、建機用バルブを例にとり説明したが、これに限らず、互いに連通される流体通路をそれぞれ備える2つの接続面間にガスケットを配置する場合に、本発明は広く適用可能であり、同様の効果を奏する。
【0024】
【発明の効果】
請求項1の発明によると、ビードでは接触面圧が高いため、高圧流体用通路から流体が漏れても、同一ビードによって高圧通路用孔とともに囲まれた低圧通路用孔を介して低圧流体用通路に流体を戻すことができる。このため、作動流体が高圧であってもビードの外方に流体が漏れることを抑制でき、ガスケットと部材との間での流体漏れを低減できる。
請求項2の発明によると、ビードの内側に沿う流体逃がし通路によって誘導されて、高圧流体用通路から漏れた流体が低圧流体用通路に戻りやすくなり、ガスケットと部材との間での流体漏れをさらに低減できる。
請求項3の発明によると、流体逃がし通路によって誘導されて、通路から漏れた流体がタンク通路を介しタンクへと戻るため、作動流体が高圧であっても、ガスケットと部材との間での流体漏れを低減することができる。
請求項4の発明によると、ビードの外方に流体が漏れることを抑制し、通路から漏れた流体を流体逃がし通路に沿ってタンクに戻すことができる。そして、通路から漏れた流体の圧力は流体逃がし通路にて低下し、ビードに作用する流体圧力も低くなるため、ガスケットと部材との間での流体漏れをさらに低減できる。請求項5の発明によると、各接続面間に配置されるガスケットの形状を共通化できるため、ガスケットの種類を削減できる。
請求項6の発明によると、爪部をボルト穴に係合させることで、部材の接続面に対して位置決めすることができ、部材の通路とガスケットの通路用孔とを合わせることができる。即ち、位置決め機構としては、ガスケットに爪部を設けるだけで部材側の加工も必要ないため、加工が容易な位置決め機構を実現できる。
請求項7の発明によると、ボルトとボルト孔との間に設けられた隙間に爪部が係合することで位置決めされる。即ち、バルブ側に爪部係合用に新たな加工を行う必要も無く、加工が容易な位置決め機構を実現できる。また、ビードや通路用孔が所定の位置に位置決めされ、流体漏れを低減できる。
【図面の簡単な説明】
【図1】本実施形態に係るガスケットを備える多連弁を示す平面図である。
【図2】図1におけるV−V線矢視断面図である。
【図3】(a)本実施形態に係る多連弁におけるバルブの接続面を示す図1におけるW−W矢視図である。
(b)本実施形態に係る多連弁におけるバルブの接続面を示す図1におけるX−X矢視図である。
【図4】本実施形態に係るガスケットの平面図である。
【図5】図4のA−A、B−B、C−C、D−D線矢視の要部断面図である。
【符号の説明】
1 多連弁
2 ガスケット
11〜19 バルブ
22 低圧流体用通路
23、24 高圧流体用通路
51 低圧通路用孔
52〜55 高圧通路用孔
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention provides a gasket disposed between a connection surface of two members each having a fluid passage communicated with each other, and a plurality of valves each having a fluid passage communicated with each other, wherein each connection surface of the valve is provided. The present invention relates to a multiple valve including a gasket having a gasket disposed therebetween.
[0002]
[Prior art]
In some cases, a gasket is disposed between the connection surfaces of two members each having a fluid passage communicated with each other to prevent leakage of fluid from between the connection surfaces. For example, there is a case where a gasket is arranged between the connection surfaces of two adjacent valves. As described above, as a device in which a gasket is provided between valves and the like, there is a device described in Patent Document 1 below.
[0003]
However, when the gasket described in Patent Literature 1 is applied between the connection surfaces of two members, the member to be applied uses a high-pressure working fluid such as a valve for a construction machine. (In the case of a construction machine valve, high pressure oil of about 25 MPa is often used), and there is a concern that the working fluid may leak. Further, in a multiple valve in which a plurality of valves each having a fluid passage communicated with each other are connected in series, for example, in a multiple valve for a construction machine, the position of a passage that is opened on each connection surface of each valve is determined by each connection. It often differs from surface to surface, and many types of gaskets need to be manufactured according to the shape of each connection surface.
[0004]
In addition, it is necessary to position the gasket with respect to the connection surface of each member. Such positioning mechanisms include those described in Patent Literature 2 and Patent Literature 3 below. In these methods, positioning is provided by providing a projecting portion for positioning on the gasket side, and by forming a concave portion on the member side to be fitted with the projecting portion of the gasket. However, according to these positioning mechanisms, processing is also required on the member side, which leads to an increase in man-hours and a complicated structure.
[0005]
[Patent Document 1]
JP-A-3-189487 [Patent Document 2]
JP-A-11-351395 [Patent Document 3]
JP-A-5-346168
[Problems to be solved by the invention]
The present invention has been made in view of the above circumstances, and has an object to provide a gasket disposed between a connection surface of two members having a fluid passage communicating with each other, which can reduce fluid leakage even when a working fluid has a high pressure. . It is another object of the present invention to reduce the types of gaskets in a multiple valve in which a gasket is disposed between connecting surfaces of valves that are connected in series. It is another object of the present invention to provide a gasket including a positioning mechanism that is easy to process and a multiple valve including the gasket.
[0007]
[Means for Solving the Problems]
The gasket according to claim 1, which solves the above-mentioned problem, is a gasket disposed between a connecting surface of two members each having a fluid passage communicated with each other, the gasket facing a low-pressure fluid passage of the member. And a high-pressure passage hole provided at a position facing the high-pressure fluid passage of the member through which a fluid having a higher pressure than the fluid flowing through the low-pressure fluid passage is provided. The low-pressure passage hole and the high-pressure passage hole are surrounded by the same continuous bead.
Here, the bead is a portion formed to be more protruded than a flat portion.
According to this configuration, since the contact surface pressure is high in the bead, even if the fluid leaks from the high-pressure fluid passage, the fluid is supplied to the low-pressure fluid passage through the low-pressure passage hole surrounded by the same bead together with the high-pressure passage hole. You can go back. For this reason, even if the working fluid is at a high pressure, the fluid can be prevented from leaking to the outside of the bead, and the fluid leakage between the gasket and the member can be reduced.
[0008]
According to a second aspect of the present invention, in the gasket according to the first aspect, a fluid release passage communicating with the low-pressure fluid passage is formed substantially along the bead from the vicinity of the high-pressure passage hole.
According to this configuration, the fluid leaked from the high-pressure fluid passage, which is guided by the fluid escape passage along the inside of the bead, easily returns to the low-pressure fluid passage, and the fluid leakage between the gasket and the member can be further reduced. .
[0009]
The gasket according to claim 3, wherein the gasket is disposed between a connection surface of two members each having a fluid passage communicated with each other, and has a passage hole provided at a position facing the passage of the member. A fluid escape passage communicating with the tank passage of the member communicating with the tank is formed up to the vicinity of the passage hole.
According to this configuration, since the fluid leaked from the passage is guided to the fluid escape passage and returns to the tank through the tank passage, the fluid leak between the gasket and the member is reduced even when the working fluid is at a high pressure. can do.
[0010]
A gasket according to a fourth aspect is the gasket according to the third aspect, wherein a bead is arranged along an outer periphery of the fluid escape passage.
According to this configuration, it is possible to suppress the fluid from leaking to the outside of the bead, and to return the fluid leaked from the passage to the tank along the fluid escape passage. Then, the pressure of the fluid leaking from the passage decreases in the fluid escape passage, and the fluid pressure acting on the bead also decreases, so that the fluid leakage between the gasket and the member can be further reduced.
[0011]
A multiple valve provided with the gasket according to claim 5, wherein a plurality of valves each having a fluid passage communicated with each other are connected in series, and each connection surface of adjacent valves in the plurality of valves is provided. A gasket is disposed between the gaskets, and each passage opening to each connection surface of each valve opens at substantially the same position, or at a position separated by a predetermined interval. A passage hole is formed at a position facing the passage.
According to this configuration, the shape of the gasket disposed between the connection surfaces can be made common, so that the type of the gasket can be reduced.
[0012]
The gasket according to claim 6, wherein the gasket is disposed between a connection surface of two members each including a fluid passage communicated with each other, and a passage hole provided at a position facing the passage of the member, A bolt hole provided at a position facing a bolt hole through which a bolt for connecting the member is inserted, and a claw portion engageable with the bolt hole, wherein the claw portion includes the bolt and the bolt hole. And bendable so that it can be inserted into the gap.
According to this configuration, by engaging the claw portion with the bolt hole, the positioning can be performed with respect to the connection surface of the member, and the passage of the member can be aligned with the passage hole of the gasket. That is, as the positioning mechanism, only the claw portion is provided on the gasket and processing on the member side is not necessary, so that a positioning mechanism that can be easily processed can be realized.
[0013]
A multiple valve provided with the gasket according to claim 7, wherein the multiple valves each having a fluid passage communicated with each other are connected in series, and each connection surface of adjacent valves in the multiple valves is provided. A gasket is arranged between the gaskets, and the gasket is provided at a position facing a bead, a passage hole provided at a position facing the passage of the valve, and a bolt hole through which a bolt connecting the valve is inserted. And a claw portion bent so as to be engageable with the bolt hole, wherein the bolt hole is formed to have a larger diameter than a bolt diameter, and the claw portion is formed by the bolt and the bolt. By being engaged with the bolt hole between the holes, the respective passages of the valve are positioned so as to face the passage holes of the gasket.
According to this configuration, the claw portion is positioned by engaging with the gap provided between the bolt and the bolt hole. That is, it is not necessary to perform a new process for engaging the claw portion on the valve side, and a positioning mechanism that can be easily processed can be realized. Further, the beads and the passage holes are positioned at predetermined positions, so that fluid leakage can be reduced.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing a multiple valve 1 including a gasket according to the present embodiment (hereinafter, referred to as “multiple valve 1”). The multiple valve 1 is used for controlling a plurality of actuators in a construction machine such as a mini shovel having a hydraulic actuator and a traveling crawler.
[0015]
The multiple valve 1 is provided with a plurality of valves (members) 11 to 19 each including a fluid passage (a passage through which oil flows) that is communicated with each other. The multiple valve 1 is also provided with port blocks (members) 20, 21, and 43 that communicate with a pressure oil supply pump and a tank (not shown). Gaskets 2 (2a to 2k) are arranged between adjacent connection surfaces (11a, 12a, 12b, 13a... 21a, 21b, 43a) of a plurality of members (valves, blocks). Have been.
[0016]
FIG. 2 is a cross-sectional view (cross-sectional view of the valve 19) taken along the line VV in which the overload relief valve of FIG. 1 is omitted as an example of a valve cross-section. The valve 19 is a pilot-operated valve operated by a pilot pressure from a remote control valve (not shown) connected to the operation lever, and the other valves (11 to 18) also have substantially the same internal structure. The valve 19 includes a tank passage 22 that communicates with the tank, a supply passage 23 and a center bypass passage 24 that communicates with a pressure oil supply pump, and a pilot pressure oil. Flowing pilot passages (25 to 28, 38 to 41) are formed. The tank passage 22 forms a low-pressure fluid passage through which a low-pressure fluid (low-pressure oil) having an atmospheric pressure or a tank pressure of 10 Mpa or less flows, and the supply passage 23 and the center bypass passage 24 flow through the low-pressure fluid passage. A high-pressure fluid passage through which a fluid (high-pressure oil of 10 to 25 Mpa) higher in pressure than the fluid (low-pressure oil) flows.
[0017]
A spool hole 29 is provided in the valve 19, and a spool 30 is slidably inserted into the spool hole 29. The supply passage 23 and the tank passage 22 are connected or disconnected from the actuator port 33 connected to the actuator via the communication passages 31 and 32 by the movement of the spool 30 in the left and right direction in the drawing. When the center bypass passage 24 is shut off, the oil pressure in the supply passage 23 increases, and the check valve 37 is pushed open to communicate with the communication passage 31a or 31b. Further, the spool 30 moves when the pilot pressure oil is supplied from the pilot passage 25 to the hydraulic chambers 34 at both ends of the valve 19. The other valves have substantially the same configuration. The pilot passages 38 to 41 can communicate with the hydraulic chamber through an oil passage formed in the spool at a predetermined valve. The multiple valve 1 has four bolts 35 for connecting a plurality of valves (members), and the bolts 35 are inserted into bolt holes 36.
[0018]
FIG. 3 shows a connection surface 19a (FIG. 3A) and a connection surface 13b (FIG. 3B) as examples of the valve end surface (connection surface). As shown in FIG. 3A, a tank passage 22, a supply passage 23, a center bypass passage 24, a bolt hole 36, and pilot passages 26 to 28 and 38 to 41 are opened in the connection surface 19a. A passage 42 communicating with the communication passage 32 (see FIG. 2) to the tank passage 22 is also open. As shown in FIG. 3B, a tank passage 22, a supply passage 23, a center bypass passage 24, a bolt hole 36, a pilot passage 28, and 39 to 41 are opened in the connection surface 13b. Further, a passage 42 communicating with the communication passage to the tank passage 22 in the valve 15 is also opened. Note that the center bypass passage 24 and the pilot passages 28, 39, 41 are shown with grooves or recesses formed in the openings. The pilot passage is slightly different for each connection surface because it communicates with each hydraulic chamber in each valve, but the other valves also have connection surfaces substantially similar to those in FIG. As described above, in the multiple valve 1, the passages (22, 23, 24, 25 to 28, 38 to 41) that open to the connection surfaces of the valves are located at substantially the same position or at positions separated by a predetermined interval. It is open.
[0019]
Next, the gasket 2 of the multiple valve 1 and the gasket 2 according to the embodiment of the present invention will be described. FIG. 4 shows a plan view of the gasket 2. The gaskets 2 (2a to 2k) are arranged between the connection surfaces of the valves (members) 11 to 19 or the blocks (members) 20, 21, and 43 (see FIG. 1). That is, it is mounted facing the connection surfaces 19a and 13b shown in FIG. The gasket 2 is provided with a low-pressure passage hole 51 at a position facing the low-pressure fluid passage (tank passage 22) of the valve. Further, high pressure passage holes 52 and 53 are provided at positions opposed to the supply passage 23 and the center bypass passage 24 which are high pressure fluid passages, respectively, and the high pressure passage holes 52 and 53 are provided at positions opposed to other high pressure fluid passages in the multiple valve 1. Passage holes 54 and 55 are provided. The low-pressure passage hole 51 and the high-pressure passage hole (52 to 55) are surrounded by the same continuous bead 56. The bead 56 is a portion formed so as to protrude from a flat portion as shown in a cross-sectional view taken along the line AA (FIG. 5A). The raised corner (corner) portion 56a is pressed against the connection surface, thereby preventing fluid leakage. Further, a fluid relief passage 51a communicating with the low-pressure fluid passage (tank passage 22) is formed substantially along the bead 56 from near the high-pressure passage hole. The beat 56 is formed by a straight line including a curve, and is formed so that the area surrounded by the beat 56 becomes small.
[0020]
The gasket 2 is provided with a passage hole group 57 at a position facing the pilot passages (38 to 41) of the valve. A fluid escape passage 61 communicating with the passage 42 (see FIG. 3) communicating with the tank passage is formed up to the vicinity of the passage hole group 57. The fluid escape passage 61 is formed so as to surround most of the passage hole group 57. Further, a bead 62 is arranged along the outer periphery of the fluid escape passage 61. The bead 62 is formed so as to protrude from a flat portion as shown in a partial cross-sectional view taken along the line CC (FIG. 5C).
[0021]
Further, high pressure passage holes (63 to 65) are provided at positions facing the other high pressure fluid passages in the multiple valve 1, and beads are provided around the high pressure passage holes (63 to 65), respectively. (66-68) are arranged. FIG. 5B is a cross-sectional view (a cross-sectional view taken along line BB) of the high-pressure passage hole 65 and the bead 68. Further, passage holes (69 to 76) are provided at positions facing the pilot passages (25 to 28), and the passage holes (69 to 72) and the passage holes (73 to 76) have the same beads. 77 and 78 respectively.
[0022]
The gasket 2 is provided with bolt holes 79 (79a-d) at positions facing the bolt holes 36 (36a-d) of the valve. The bolt holes 79a and 79d at the distant positions have three claw portions 80 and 81 respectively engageable with the bolt holes 36a and 36d (see FIG. 3) inside the bolt holes 79a and 79d. It is provided so as to protrude. FIG. 5D shows a cross-sectional view (a cross-sectional view taken along line DD) of the claw portion 81 (the same applies to the claw portion 80). In FIG. 5D, the bolt 35a is formed to be inclined at an angle of about 45 °, and can be inserted into a gap between the bolt 35a (or 35d) and the bolt hole 36a (or 36d). Since the bolt hole has a gap equivalent to a screw thread and is formed slightly larger in diameter than the bolt diameter, the claw portions 80 and 81 can be inserted using this. As described above, the pawl portions 80 and 81 are engaged with the bolt holes 36 between the bolts 35 and the bolt holes 36, so that the respective passages of the valve and the gasket passage holes are positioned so as to face each other. . Further, since the three claw portions are provided for one bolt hole 36, the displacement of the gasket 2 with respect to the connection surface can be prevented.
[0023]
The above is the description of the multiple valve 1 and the gasket 2 according to the present embodiment. According to the gasket 2, fluid leakage can be reduced even when the working fluid has a high pressure. Since the gasket has a passage hole formed at a position facing each passage of each valve, it is not necessary to use an O-ring surrounding each passage, and it is not necessary to form an O-ring groove in each valve. . In addition, since it is not a metal seal, the surface roughness of the connection surface can be reduced, and the surface processing of the connection surface becomes easy. Further, in a construction machine valve, since it is necessary to provide a plurality of pilot passages, if these are individually sealed, an increase in parts and processing man-hours is caused, but this can be prevented. And according to the multiple valve 1, since the shape of the gasket arranged between each connection surface can be made common, the type of gasket can be reduced. The description of the present embodiment has been given by taking a construction machine valve as an example. However, the present invention is not limited to this, and when the gasket is arranged between two connection surfaces each having a fluid passage communicating with each other, the present invention It is widely applicable and has a similar effect.
[0024]
【The invention's effect】
According to the first aspect of the present invention, since the contact pressure is high in the bead, even if fluid leaks from the high-pressure fluid passage, the low-pressure fluid passage is surrounded by the same bead and the low-pressure passage hole surrounded by the high-pressure passage hole. Fluid can be returned to the For this reason, even if the working fluid is at a high pressure, the fluid can be prevented from leaking to the outside of the bead, and the fluid leakage between the gasket and the member can be reduced.
According to the second aspect of the present invention, the fluid leaked from the high-pressure fluid passage, which is guided by the fluid escape passage along the inside of the bead, easily returns to the low-pressure fluid passage, and prevents fluid leakage between the gasket and the member. It can be further reduced.
According to the third aspect of the invention, since the fluid leaked from the passage is guided to the fluid escape passage and returns to the tank via the tank passage, the fluid between the gasket and the member can be maintained even when the working fluid has a high pressure. Leakage can be reduced.
According to the fourth aspect of the present invention, it is possible to prevent the fluid from leaking to the outside of the bead and return the fluid leaked from the passage to the tank along the fluid escape passage. Then, the pressure of the fluid leaking from the passage decreases in the fluid escape passage, and the fluid pressure acting on the bead also decreases, so that the fluid leakage between the gasket and the member can be further reduced. According to the invention of claim 5, since the shape of the gasket disposed between the connection surfaces can be made common, the type of the gasket can be reduced.
According to the invention of claim 6, by engaging the claw portion with the bolt hole, it is possible to position the member with respect to the connection surface of the member, so that the passage of the member and the passage hole of the gasket can be matched. That is, as the positioning mechanism, only the claw portion is provided on the gasket and processing on the member side is not necessary, so that a positioning mechanism that can be easily processed can be realized.
According to the seventh aspect of the present invention, the positioning is performed by engaging the claw portion with the gap provided between the bolt and the bolt hole. That is, it is not necessary to perform a new process for engaging the claw portion on the valve side, and a positioning mechanism that can be easily processed can be realized. Further, the beads and the passage holes are positioned at predetermined positions, so that fluid leakage can be reduced.
[Brief description of the drawings]
FIG. 1 is a plan view showing a multiple valve including a gasket according to the present embodiment.
FIG. 2 is a sectional view taken along line VV in FIG.
FIG. 3 (a) is a view taken on line WW in FIG. 1 and shows a connection surface of a valve in the multiple valve according to the present embodiment.
(B) It is the XX arrow line view in FIG. 1 which shows the connection surface of the valve in the multiple valve which concerns on this embodiment.
FIG. 4 is a plan view of the gasket according to the embodiment.
5 is a cross-sectional view of a main part taken along line AA, BB, CC, and DD in FIG. 4;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Multiple valve 2 Gasket 11-19 Valve 22 Low pressure fluid passage 23, 24 High pressure fluid passage 51 Low pressure passage hole 52-55 High pressure passage hole

Claims (7)

互いに連通される流体通路をそれぞれ備える2つの部材の接続面間に配置されるガスケットであって、
前記部材の低圧流体用通路と対向する位置に設けられる低圧通路用孔と、前記低圧流体用通路を流動する流体よりも高圧の流体が流動する前記部材の高圧流体用通路に対向する位置に設けられる高圧通路用孔と、を備え、
前記低圧通路用孔と前記高圧通路用孔とが連続する同一のビードで囲まれていることを特徴とするガスケット。
A gasket disposed between connecting surfaces of two members each having a fluid passage communicated with each other,
A low-pressure passage hole provided at a position facing the low-pressure fluid passage of the member, and a low-pressure passage hole provided at a position facing the high-pressure fluid passage of the member through which a higher-pressure fluid flows than the low-pressure fluid passage fluid A high pressure passage hole,
A gasket, wherein the low-pressure passage hole and the high-pressure passage hole are surrounded by the same continuous bead.
前記低圧流体用通路と連通する流体逃がし通路が前記高圧通路用孔の近傍から前記ビードに略沿って形成されていることを特徴とする請求項1に記載のガスケット。The gasket according to claim 1, wherein a fluid release passage communicating with the low-pressure fluid passage is formed substantially along the bead from near the high-pressure passage hole. 互いに連通される流体通路をそれぞれ備える2つの部材の接続面間に配置されるガスケットであって、
前記部材の通路と対向する位置に設けられる通路用孔を備え、タンクに通じる前記部材のタンク通路に連通する流体逃がし通路が前記通路用孔の近傍まで形成されていることを特徴とするガスケット。
A gasket disposed between connecting surfaces of two members each having a fluid passage communicated with each other,
A gasket comprising a passage hole provided at a position facing a passage of the member, and a fluid escape passage communicating with a tank passage of the member communicating with a tank is formed up to a vicinity of the passage hole.
前記流体逃がし通路の外周に沿ってビードが配置されていることを特徴とする請求項3に記載のガスケット。The gasket according to claim 3, wherein a bead is arranged along an outer periphery of the fluid escape passage. 互いに連通される流体通路をそれぞれ備える複数のバルブが連設される多連弁であって、
前記複数のバルブにおける隣り合うバルブの各接続面間にはそれぞれガスケットが配置され、
前記各バルブの各接続面に開口する各通路が、ほぼ同一位置、または、所定間隔を隔てた位置で開口し、
前記ガスケットには、前記各バルブの前記各通路と対向する位置に通路用孔が形成されていることを特徴とするガスケットを備える多連弁。
A multiple valve in which a plurality of valves each having a fluid passage communicated with each other are provided in series,
Gaskets are respectively arranged between connection surfaces of adjacent valves in the plurality of valves,
Each passage opening to each connection surface of each of the valves is opened at substantially the same position, or at a position separated by a predetermined interval,
A multiple valve comprising a gasket, wherein a passage hole is formed in the gasket at a position facing each of the passages of each of the valves.
互いに連通される流体通路をそれぞれ備える2つの部材の接続面間に配置されるガスケットであって、
前記部材の通路と対向する位置に設けられる通路用孔と、前記部材を連結するボルトが挿通されるボルト孔と対向する位置に設けられるボルト用孔と、前記ボルト孔に係合可能な爪部と、を備え、
前記爪部は、前記ボルトと前記ボルト孔との隙間に挿入可能に折り曲げられることを特徴とするガスケット。
A gasket disposed between connecting surfaces of two members each having a fluid passage communicated with each other,
A passage hole provided at a position facing the passage of the member, a bolt hole provided at a position facing a bolt hole into which a bolt connecting the member is inserted, and a claw portion engageable with the bolt hole And
The gasket, wherein the claw portion is bent so as to be inserted into a gap between the bolt and the bolt hole.
互いに連通される流体通路をそれぞれ備える複数のバルブが連設される多連弁であって、
前記複数のバルブにおける隣り合うバルブの各接続面間にはそれぞれガスケットが配置され、
前記ガスケットは、ビードと、前記バルブの通路と対向する位置に設けられる通路用孔と、前記バルブを連結するボルトが挿通されるボルト孔と対向する位置に設けられるボルト用孔と、前記ボルト孔に係合可能に折り曲げられた爪部と、を備え、
前記ボルト孔は、ボルト径よりも大径に形成されており、
前記爪部が前記ボルトと前記ボルト孔との間で前記ボルト孔に係合することで、前記バルブの前記各通路と前記ガスケットの前記通路用孔とが対向するように位置決めされることを特徴とするガスケットを備える多連弁。
A multiple valve in which a plurality of valves each having a fluid passage communicated with each other are provided in series,
Gaskets are respectively arranged between connection surfaces of adjacent valves in the plurality of valves,
The gasket includes a bead, a passage hole provided at a position facing the valve passage, a bolt hole provided at a position facing a bolt hole through which a bolt connecting the valve is inserted, and the bolt hole. And a claw portion bent to be engageable with
The bolt hole is formed with a larger diameter than the bolt diameter,
The claw portion is engaged with the bolt hole between the bolt and the bolt hole, whereby the respective passages of the valve and the passage holes of the gasket are positioned so as to face each other. Valve with a gasket.
JP2002269354A 2002-09-17 2002-09-17 gasket Expired - Fee Related JP4159837B2 (en)

Priority Applications (5)

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JP2002269354A JP4159837B2 (en) 2002-09-17 2002-09-17 gasket
IT000701A ITTO20030701A1 (en) 2002-09-17 2003-09-15 GASKET AND MULTIPLE VALVE PROVIDED WITH GASKETS.
KR1020030064392A KR100662529B1 (en) 2002-09-17 2003-09-17 Gasket and mutually communicating valve with gasket
KR1020060036777A KR100633802B1 (en) 2002-09-17 2006-04-24 Gasket and mutually communicating valve with gasket
KR1020060036778A KR100633803B1 (en) 2002-09-17 2006-04-24 Gasket and mutually communicating valve with gasket

Applications Claiming Priority (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006046579A (en) * 2004-08-06 2006-02-16 Kayaba Ind Co Ltd Multiple type directional control valve
US8047234B2 (en) 2006-10-12 2011-11-01 Smc Kabushiki Kaisha Valve apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200449741Y1 (en) * 2008-02-27 2010-08-05 임채부 Stick and separation structure of abrasives with leg ailments

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10213067A (en) 1997-01-29 1998-08-11 Toyota Autom Loom Works Ltd Sealing device for liquid machinery
DE29811346U1 (en) 1998-06-25 1998-10-08 Elring Klinger GmbH, 72581 Dettingen Flat gasket
JP4361988B2 (en) 1999-06-08 2009-11-11 石野ガスケット工業株式会社 Metal gasket for multiple proximity holes
KR100318418B1 (en) * 1999-12-30 2001-12-22 신영주 Oil separator embeded in compressor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006046579A (en) * 2004-08-06 2006-02-16 Kayaba Ind Co Ltd Multiple type directional control valve
US8047234B2 (en) 2006-10-12 2011-11-01 Smc Kabushiki Kaisha Valve apparatus

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KR20040025607A (en) 2004-03-24
KR20060039426A (en) 2006-05-08
KR100662529B1 (en) 2006-12-28
KR100633802B1 (en) 2006-10-16
ITTO20030701A1 (en) 2004-03-18
KR100633803B1 (en) 2006-10-16
JP4159837B2 (en) 2008-10-01

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