JP4935301B2 - Hydraulic pipe pressure release device and hydraulic pipe structure - Google Patents

Hydraulic pipe pressure release device and hydraulic pipe structure Download PDF

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JP4935301B2
JP4935301B2 JP2006297792A JP2006297792A JP4935301B2 JP 4935301 B2 JP4935301 B2 JP 4935301B2 JP 2006297792 A JP2006297792 A JP 2006297792A JP 2006297792 A JP2006297792 A JP 2006297792A JP 4935301 B2 JP4935301 B2 JP 4935301B2
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pressure relief
valve
hydraulic
block
oil
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JP2008115905A (en
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隆典 山崎
信洋 古賀
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Kobelco Construction Machinery Co Ltd
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Kobelco Construction Machinery Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
    • F15B20/007—Overload
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
    • E02F9/2267—Valves or distributors
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
    • E02F9/2275—Hoses and supports therefor and protection therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/005—Filling or draining of fluid systems

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Preventing Unauthorised Actuation Of Valves (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)
  • Details Of Valves (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)

Abstract

A depressurization block (8) is provided lying over a plurality of hydraulic pipes (3 and 4). The depressurization block (8) is provided with main passages to which the pipes (3 and 4) are connected, depressurization valves (10) for removing oil on the inside of the pipes by an opening operation from the exterior, and a drain passage for joining and guiding the oil removed from the depressurization valves (10), and the oil in all the pipes (3 and 4) is all removed to the exterior. An opening operation is performed to operation elements of the depressurization valves (10) at the same time by a push plate having protrusions and the operation elements are held in an opening state.

Description

本発明は破砕機や解体機等の作業機械に設けられた油圧配管内の圧力を抜く圧抜き装置、及び圧抜き装置付きの油圧配管構造に関するものである。   The present invention relates to a pressure relief device for releasing pressure in a hydraulic pipe provided in a working machine such as a crusher or a dismantling machine, and a hydraulic pipe structure with a pressure release device.

たとえば解体機の長尺アタッチメントを構成するブームは、機械の分解輸送性等を考慮して複数の短い単位ブームに分解可能に構成されている。そして、このブームに設けられる油圧配管も単位ブームごとに単位配管に分割され、互いの端部に設けられた継手によって接続／分離されるようになっている。   For example, the boom constituting the long attachment of the dismantling machine is configured to be disassembled into a plurality of short unit booms in consideration of the disassembly and transportability of the machine. The hydraulic piping provided on the boom is also divided into unit piping for each unit boom, and is connected / separated by a joint provided at each end.

なお、継手としては、通常、ワンタッチで着脱可能である点に加えて着脱時の油漏れが殆どないという特長を備えた密閉式のカプラ(クイックカプラやセルフシールカップリング等と呼ばれる。以下、これを単にカプラという)が用いられる。このカプラは、相手方継手と雄雌結合され、かつ、結合操作力によって開弁する構成を備えている。   In addition, the joint is usually a hermetic coupler (called a quick coupler, self-sealing coupling, etc.) that has the feature that there is almost no oil leakage when attaching and detaching in addition to being detachable with one touch. Is simply referred to as a coupler). This coupler has a configuration in which a male and female joint is coupled to a counterpart joint and the valve is opened by a coupling operation force.

ところが、このカプラに代表される密閉式の継手を用いると、配管が内部圧力を残したまま単位配管に切り離される場合がある。   However, when a sealed joint represented by this coupler is used, the pipe may be separated into unit pipes while leaving the internal pressure.

また、切り離した状態でたとえば単位配管が野外に放置された結果、外気温の上昇により、配管内に閉じ込められた油の温度が上がって膨張し、配管内の圧力が上昇する場合がある。   Further, for example, as a result of the unit pipe being left outside in the disconnected state, the temperature of the oil trapped in the pipe rises and expands due to an increase in the outside air temperature, and the pressure in the pipe may increase.

さらに、圧力が立っていない状態でも、単位配管同士を接続する際に、充満した油が抵抗となって継手の開弁動作が阻まれる場合もある。   Furthermore, even when the pressure is not standing, when the unit pipes are connected to each other, the filled oil may become a resistance and prevent the valve opening operation of the joint.

このため、機械の組立時における配管接続作業が面倒または不能となる。   For this reason, piping connection work at the time of assembly of the machine becomes troublesome or impossible.

従来、この点の対策として、特許文献１に示されているように各配管の端部（継手に設ける場合を含む）に圧抜き弁を設け、圧抜き弁の押しボタンを操作することにより残圧を抜く技術が提案されている。   Conventionally, as a countermeasure against this point, as shown in Patent Document 1, a pressure relief valve is provided at the end of each pipe (including the case where it is provided at a joint), and the pressure relief valve is operated by operating a push button of the pressure relief valve. A technique for releasing pressure has been proposed.

また、特許文献２には、各配管をチェック弁を介して合流管路に合流させ、この合流管路を一つのストップバルブの操作で開くことにより、各配管の油を一括して抜く技術が開示されている。
特開２００１−２０８２２１号公報 特許第３２９４５５０号 Patent Document 2 discloses a technique for extracting oil from each pipe at once by joining the pipes to a merging pipe line via a check valve and opening the merging pipe line by operating one stop valve. It is disclosed.
JP 2001-208221 A Japanese Patent No. 3294550

ところが、特許文献１に記載された公知技術のように配管ごとに圧抜き弁を設け、圧抜き弁ごとに圧力（油）を抜く構成をとると、圧抜きの作業能率が悪い。   However, if a pressure relief valve is provided for each pipe as in the known technique described in Patent Document 1 and pressure (oil) is taken for each pressure relief valve, the work efficiency of pressure relief is poor.

なお、この問題に対し、出願人は、特願２００５−０４９４０２号として、タンクに接続された一本の圧抜き管を設け、各圧抜き弁と圧抜き管を順次ホースでつないで圧抜きを行う技術を提案した。しかし、この技術によっても、配管ごとにホースをつなぎ変えなければならないため、なお圧抜き作業の能率が悪い。   To solve this problem, the applicant, as Japanese Patent Application No. 2005-049402, provided a single pressure relief pipe connected to the tank, and connected each pressure relief valve and the pressure relief pipe with a hose in order to release the pressure. Proposed technique to do. However, even with this technique, the efficiency of the depressurization operation is still poor because the hose must be changed for each pipe.

一方、特許文献２の技術によると、高圧が常に一つのストップバルブに集中してかかり、同バルブの破損時に全配管内の高圧油が一気に流出して油圧アクチュエータが一斉に作動不能に陥ったり油抜けによって危険側に作動したりする等の事態が発生し危険となる。   On the other hand, according to the technique of Patent Document 2, high pressure is always concentrated on one stop valve, and when the valve is broken, the high pressure oil in all the pipes flows all at once and the hydraulic actuators become inoperable all at once. A situation such as operation on the dangerous side occurs due to the disconnection, which is dangerous.

そこで本発明は、複数の配管の油を一括して抜くことができ、しかも特許文献２の公知技術のようなリスクがない油圧配管の圧抜き装置及び油圧配管構造を提供するものである。   Therefore, the present invention provides a pressure relief device and a hydraulic piping structure for hydraulic piping that can drain oil from a plurality of pipings at the same time and that do not have a risk as in the known technique of Patent Document 2.

請求項１の発明（油圧配管の圧抜き装置）は、圧抜きブロックを備え、この圧抜きブロックには、複数本の油圧配管が接続される複数のメイン通路と、外部からの手動開き操作により油圧配管内の油を各メイン通路を介して抜く圧抜き弁と、この各圧抜き弁から抜かれた油を合流させて外部に導くドレン通路とを設け、上記各圧抜き弁に、外部から押し操作されてドレンポートを開く操作子を設け、かつ、すべての上記操作子を同時に押し操作する複数の操作部を備えた操作体を具備し、この操作体は、上記操作部で全操作子を押し操作した操作状態で上記圧抜きブロックに保持し得るように構成されたものである。 The invention of claim 1 (hydraulic piping depressurization apparatus) includes a depressurizing block, and the depressurizing block includes a plurality of main passages to which a plurality of hydraulic piping is connected, and a manual opening operation from the outside. A pressure relief valve that drains the oil in the hydraulic piping through each main passage and a drain passage that joins the oil drawn from each pressure relief valve and leads to the outside are provided . An operating element that is operated to open the drain port and includes a plurality of operating parts that simultaneously press and operate all the operating elements is provided. The pressure release block is configured so as to be held in the pressed operation state .

請求項２の発明は、請求項１の構成において、上記操作体は、裏面に上記操作部が設けられ、裏返しの非操作状態で上記圧抜きブロックに保持し得るように構成されたものである。 According to a second aspect of the present invention, in the configuration of the first aspect, the operation body is configured such that the operation portion is provided on the back surface and can be held on the pressure release block in a non-operated state of being reversed. .

請求項３の発明は、請求項２の構成において、上記操作体は、回動して表裏反転し得るように上記圧抜きブロックにヒンジを介して取付けられたものである。 The invention of claim 3 is the structure of claim 2, said operating body is one was attached et via a hinge to the depressurization block so as to reversed rotated.

請求項４の発明は、請求項２または３の構成において、上記操作体の表裏両面を色分けしたものである。 According to a fourth aspect of the present invention, in the configuration of the second or third aspect, the front and back surfaces of the operating body are color-coded .

請求項５の発明(油圧配管構造)は、請求項１〜４のいずれか１項に記載の圧抜用装置の圧抜きブロックが複数本の油圧配管に跨って設けられ、この圧抜きブロックのメイン通路に各油圧配管が接続され、圧抜き弁を開き操作することにより油圧配管内の油をメイン通路及びドレン通路を介して外部に一括して抜くように構成されたものである。 According to a fifth aspect of the present invention (hydraulic piping structure) , the depressurizing block of the depressurizing device according to any one of the first to fourth aspects is provided across a plurality of hydraulic piping, Each hydraulic pipe is connected to the main passage, and by opening the pressure release valve, the oil in the hydraulic pipe is collectively discharged to the outside through the main passage and the drain passage .

本発明の圧抜き装置（請求項１〜４）及び油圧配管構造（請求項５）によると、圧抜きブロックに、複数本の油圧配管が接続される複数のメイン通路と、外部からの手動開き操作によりメイン通路から油を抜く圧抜き弁と、この圧抜き弁から抜かれた油を合流させて外部に導くドレン通路を設けたから、複数の配管の油を一括して抜くことができる。このため、特許文献１の公知技術を含めて配管ごとに圧抜き作業を行う場合と比較して圧抜きの作業能率を格段に向上させることができる。 According to the pressure relief device (Claims 1 to 4 ) and the hydraulic piping structure (Claim 5 ) of the present invention, a plurality of main passages in which a plurality of hydraulic pipes are connected to the pressure relief block, and manual opening from the outside Since a pressure relief valve that drains oil from the main passage by operation and a drain passage that joins the oil removed from the pressure relief valve and leads to the outside are provided, the oil in a plurality of pipes can be drained all at once. For this reason, compared with the case where the pressure relief work is performed for each pipe including the known technique of Patent Document 1, the work efficiency of the pressure relief can be significantly improved.

しかも、各配管は圧抜き弁で個々に開閉する構成であるため、特許文献２の公知技術のような一つのバルブの破損による全配管の油抜け等のリスクもない。   In addition, since each pipe is individually opened and closed with a pressure relief valve, there is no risk of oil leakage in all the pipes due to damage of one valve as in the known technique of Patent Document 2.

この場合、操作体によってすべての圧抜き弁を同時に開き操作できるため、作業能率が一層良くなる。 In this case, since it is possible to simultaneously open operate all depressurization valves by Misao Sakutai, work efficiency becomes better.

しかも、操作体を操作状態に保持し得るため、抜いた油を油受けに回収する構成をとる場合に、開弁（圧抜き）操作と抜いた油の回収操作を１人の作業員が行うことができる。 Moreover, since capable of retaining steering Sakutai the operating state, when a configuration of recovering pulled oil into the oil pan, the valve opening (depressurization) operation and remove the 1 workers recovery operations of oil It can be carried out.

また、請求項２〜４の発明によると、操作プレートの表裏によって圧抜き弁が開き状態か閉じ状態かを判別できるため、開き状態のまま作業が開始されるおそれが少ない。 Further, according to the second to fourth aspects of the present invention, it is possible to determine whether the pressure relief valve is in the open state or the closed state based on the front and back surfaces of the operation plate, so that there is little possibility that the operation is started in the open state.

この場合、操作体を圧抜きブロックにヒンジを介して回動可能に取付けた請求項３の発明によると、操作体の操作状態と非操作状態の切換えが簡単となる。また、請求項４の発明によると、操作体の表裏両面を色分けしたから、圧抜き弁の開き状態と閉じ状態を一目で確実に判別することができる。 In this case, according to the invention of claim 3 in which the operating body is rotatably attached to the pressure release block via a hinge, the switching between the operating state and the non-operating state of the operating body is simplified. According to the invention of claim 4 , since the front and back surfaces of the operating body are color-coded, the open state and the closed state of the pressure relief valve can be reliably determined at a glance .

第１実施形態（図１〜図７参照）
図１は、解体機の長尺アタッチメントのブームを構成する多数の単位ブームのうち、二つの単位ブーム１,２と、これらに設けられた複数本（図例では五本）の単位油圧配管３…,４…を示し、ブーム組立時に、両単位ブーム１,２が連結されると同時に、対応する単位油圧配管３…,４…同士が互いの継手（雄側継手と雌側継手）５…,６…によって接続される。 1st Embodiment (refer FIGS. 1-7)
FIG. 1 shows two unit booms 1 and 2 among a plurality of unit booms constituting a boom of a long attachment of a dismantling machine, and a plurality (five in the illustrated example) of unit hydraulic pipes 3 provided on these unit booms. .., 4..., And when the booms are assembled, the unit booms 1 and 2 are connected, and at the same time, the corresponding unit hydraulic pipes 3, 4... Are connected to each other (male joint and female joint) 5. , 6...

なお、すべての単位油圧配管が接続されて構成される油圧配管は、基端側が、図示しないベースマシンに設置された油圧ポンプ及びタンクに、先端側が、ブームを含むアタッチメントに設けられた複数の油圧アクチュエータにそれぞれ接続される。   In addition, the hydraulic pipe configured by connecting all unit hydraulic pipes is composed of a plurality of hydraulic pressures provided at the base end on a hydraulic pump and a tank installed in a base machine (not shown) and at the tip end on an attachment including a boom. Each is connected to an actuator.

両単位ブーム１,２において、各単位油圧配管（以下、単に配管という）３…,４…に跨って圧抜き装置７が設けられている。   In both unit booms 1, 2, a pressure release device 7 is provided across unit hydraulic pipes (hereinafter simply referred to as pipes) 3.

この圧抜き装置７の構成を図２以降に詳しく示す。   The configuration of the pressure release device 7 is shown in detail in FIG.

同装置７は、直方形の圧抜きブロック８を備えている。   The apparatus 7 includes a rectangular pressure release block 8.

この圧抜きブロック８には、図５〜図７に示すように各配管３,４が個別に接続される複数のメイン通路９…と、外部からの手動開き操作により配管内の油を各メイン通路９…を介して抜く圧抜き弁１０…と、この各圧抜き弁１０…から抜かれた油を合流させて外部に導く一本のドレン通路１１が設けられている。   As shown in FIGS. 5 to 7, the pressure release block 8 has a plurality of main passages 9 to which the pipes 3 and 4 are individually connected, and the oil in the pipes by the manual opening operation from the outside. There are provided a pressure relief valve 10 that is drained through the passages 9 and a drain passage 11 that joins oils that have been drained from the pressure relief valves 10 to guide them to the outside.

ドレン通路１１は、メイン通路９…と直角方向、すなわち圧抜きブロック８の長手方向に貫通して設けられ、一端側が閉塞された状態で他端側にドレン継手１２（図２〜図４参照）が接続される。   The drain passage 11 is provided so as to penetrate the main passage 9 in a direction perpendicular to the main passage 9, that is, in the longitudinal direction of the pressure release block 8, and the drain joint 12 is connected to the other end side in a state where one end side is closed (see FIGS. Is connected.

このドレン継手１２にドレンホース１３が接続され、ドレン油が油受け１４に集められる。あるいは、ドレン継手１２にドレン管１５を接続し、ドレン油をこのドレン管１５を通じてタンクに戻すように構成することもできる。   A drain hose 13 is connected to the drain joint 12, and drain oil is collected in the oil receiver 14. Alternatively, the drain pipe 15 can be connected to the drain joint 12 and the drain oil can be returned to the tank through the drain pipe 15.

圧抜き弁１０の構成は特許文献１に詳しく示されている。   The configuration of the pressure relief valve 10 is shown in detail in Patent Document 1.

すなわち、この圧抜き弁１０は、図６,７に示すように、中心部に配置された弁体１６と、上下方向にスライドし得る状態でこの弁体１６に上方から被嵌された操作子１７と、弁体１６及び操作子１７を外周側から囲む有底筒状の弁ケース１８と、操作子１７を常時上向きに付勢するコイルスプリング１９とから成り、弁ケース１８が圧抜きブロック８の弁取付穴２０にねじ込まれて同ブロック８に取付けられている。   That is, as shown in FIGS. 6 and 7, the pressure relief valve 10 includes a valve body 16 disposed in the center portion, and an operating element fitted on the valve body 16 from above so as to be slidable in the vertical direction. 17, a bottomed cylindrical valve case 18 that surrounds the valve body 16 and the operating element 17 from the outer peripheral side, and a coil spring 19 that constantly biases the operating element 17 upward. And is attached to the block 8 by being screwed into the valve mounting hole 20.

弁取付穴２０の底面には、メイン通路９に通じる連通穴２１が設けられ、この連通穴２１が、弁体１６の中心部に設けられた縦穴２２と、この縦穴２２の上部に設けられた横穴２３と、操作子１７の内周に設けられた周溝２４と、この周溝に連通する状態で弁体１６と操作子１７の接触面間に形成された隙間２５と、弁体１６と弁ケース１８の間に形成された油室２６と、この油室２６に連通して弁ケース１８に鉤形に設けられたドレンポート２７とを介して圧抜きブロック８のドレン通路１１に連通するように構成されている。   A communication hole 21 communicating with the main passage 9 is provided on the bottom surface of the valve mounting hole 20, and the communication hole 21 is provided in a vertical hole 22 provided in the central portion of the valve body 16 and an upper portion of the vertical hole 22. A lateral hole 23, a circumferential groove 24 provided on the inner periphery of the operating element 17, a gap 25 formed between the contact surfaces of the valve element 16 and the operating element 17 in communication with the peripheral groove, An oil chamber 26 formed between the valve cases 18 and a drain port 27 provided in a bowl shape in the valve case 18 so as to communicate with the oil chamber 26 and communicate with the drain passage 11 of the pressure release block 8. It is configured as follows.

隙間２５は、操作子１７が上昇した状態（閉弁状態）では、図６に示すようにシール２８によって閉塞され、操作子１７が上から押されて下降すると、図７に示すようにシール２８から外れて開通する。すなわち、圧抜き弁１０が開弁状態となる。   The gap 25 is closed by the seal 28 as shown in FIG. 6 when the operating element 17 is raised (valve closed state), and when the operating element 17 is pushed down from the top and lowered, the seal 28 is shown in FIG. Open from the door. That is, the pressure relief valve 10 is opened.

従って、両単位ブーム１,２の連結後、配管３…,４…同士の接続に際して、各圧抜き弁１０…の操作子１７…を押し操作することにより、配管３…,４…の内部圧力または充満した油を、圧抜き弁１０…のドレンポート２７からドレン通路１１に抜き、一括して排出することができる。   Accordingly, after the two unit booms 1 and 2 are connected, when the pipes 3 are connected to each other, the internal pressures of the pipes 3 to 4 are pushed by pressing the operation elements 17 of the pressure relief valves 10. Alternatively, the filled oil can be extracted from the drain port 27 of the pressure relief valve 10 to the drain passage 11 and discharged collectively.

一方、操作子１７を外部から手動開き操作する操作体として、図２〜図４,図６,７に示す押し板２９が用いられる。   On the other hand, a push plate 29 shown in FIGS. 2 to 4, 6 and 7 is used as an operating body for manually opening the operating element 17 from the outside.

この押し板２９の裏面には、圧抜き弁１０の操作子１７…を個別に押し操作する操作部としての突起３０…が操作子１７…の間隔と同じ間隔を置いて並設され、図３,７に示すように押し板２９を圧抜きブロック８に上方から被せることにより、圧抜き弁１０のすべての操作子１７…が突起３０…によって同時に押し操作される。   On the back surface of the push plate 29, projections 30 as operation parts for individually pushing the operation elements 17 of the pressure relief valve 10 are arranged in parallel with the same interval as that of the operation elements 17. 7, the pressing plate 29 is put on the pressure release block 8 from above, so that all the operating elements 17 of the pressure release valve 10 are simultaneously pressed by the projections 30.

一方、圧抜きブロック８には、図１〜図４に示すように圧抜き弁１０を保護するとともに外観上の体裁を良くするためのカバー３１が被せられ、図３に示すように押し板２９が上記操作状態でこのカバー３１の上面にねじ３２…によって保持される。これにより、圧抜き弁１０…が開弁状態（操作状態）に保持される。   On the other hand, the pressure relief block 8 is covered with a cover 31 for protecting the pressure relief valve 10 and improving the appearance as shown in FIGS. 1 to 4, and as shown in FIG. Are held on the upper surface of the cover 31 by screws 32. As a result, the pressure relief valves 10 are held in the valve open state (operation state).

押し板２９は、圧抜き時以外は、図４に示すように突起３０が表側に露出する裏返しの状態でカバー３１にねじ止めされ、この押し板２９が裏向きであることで圧抜き弁１０…が閉弁状態にあることを外部から判別することができる。   As shown in FIG. 4, the push plate 29 is screwed to the cover 31 with the projection 30 exposed to the front side, except when the pressure is released. It can be determined from the outside that.

すなわち、圧抜き弁１０…が開いた状態のまま誤って作業を開始し、油が流出するトラブルを防止することができる。   That is, it is possible to prevent a trouble that oil starts by mistakenly while the pressure relief valves 10 are open and the oil flows out.

また、この押し板２９の表裏（操作状態と非操作状態）の判別をさらに容易にするために、押し板２９の表裏両面が異なる色で着色されている。この表裏の色分けを示すために、図４において裏返し状態の押し板２９に斜線を付している。   Further, in order to make the front and back (operation state and non-operation state) of the push plate 29 easier to distinguish, both front and back surfaces of the push plate 29 are colored with different colors. In order to show the color classification of the front and back, the push plate 29 in an inverted state is hatched in FIG.

このように、両単位ブーム１,２における各配管３…,４…に跨って圧抜きブロック８を設け、この圧抜きブロック８に、各配管３…,４…が接続されるメイン通路９…と、外部からの開き操作によりメイン通路９…から油を抜く圧抜き弁１０…と、この圧抜き弁１０…のドレンポート２７に抜かれた油を集めて外部に導くドレン通路１１とを設け、ブーム組立時に各配管３…,４…の油を一括して抜くように構成したから、配管ごとに圧抜き作業を行う場合と比較して圧抜きの作業能率を格段に向上させることができる。   In this way, the pressure relief block 8 is provided across the pipes 3 in the unit booms 1 and 2, and the main passage 9 to which the pipes 3 to 4 are connected to the pressure release block 8. A pressure relief valve 10 for draining oil from the main passage 9 by an opening operation from the outside, and a drain passage 11 for collecting the oil drained to the drain port 27 of the pressure relief valve 10 and leading it to the outside, Since the oil of each of the pipes 3, 4,... Is extracted at a time when the boom is assembled, the work efficiency of pressure release can be remarkably improved as compared with the case where the pressure release work is performed for each pipe.

しかも、各配管３…,４…は圧抜き弁１０…で個々に開閉する構成であるため、特許文献２の公知技術のようなバルブの破損による全配管の油抜け等のリスクもない。   Moreover, since the pipes 3... 4 are individually opened and closed by the pressure relief valves 10..., There is no risk of oil leakage from all the pipes due to valve breakage as in the known technique of Patent Document 2.

また、この実施形態によると、次の効果を奏する。   Moreover, according to this embodiment, there exist the following effects.

（Ｉ） 押し板２９によってすべての圧抜き弁１０…を同時に開き操作できるため、圧抜きの作業能率が一層良くなる。   (I) Since all the pressure relief valves 10 can be opened simultaneously by the push plate 29, the work efficiency of the pressure relief is further improved.

（ＩＩ） 押し板２９を操作状態に保持できるため、圧抜き弁１０…を開いた後、作業員がこの開き状態に保持しておく必要がない。すなわち、開弁操作と、抜いた油の回収操作を１人の作業員が行うことができる。   (II) Since the push plate 29 can be held in an operating state, it is not necessary for an operator to hold the pressure relief valve 10 in an open state after opening the pressure relief valve 10. That is, one worker can perform the valve opening operation and the recovered oil recovery operation.

第２実施形態（図８参照）
第１実施形態との相違点のみを説明する。 Second embodiment (see FIG. 8)
Only differences from the first embodiment will be described.

第１実施形態では、押し板２９を操作状態及び非操作状態で圧抜きブロック８（カバー３１）にねじ止めする構成をとったのに対し、第２実施形態では押し板２９を圧抜きブロック８（カバー３１）にヒンジ３３によって回動可能（表裏反転可能）に取付けている。   In the first embodiment, the push plate 29 is screwed to the pressure release block 8 (cover 31) in the operated state and the non-operated state, whereas in the second embodiment, the push plate 29 is fixed to the pressure release block 8. It is attached to the (cover 31) by a hinge 33 so that it can be rotated (reversed front and back).

この構成によると、押し板２９の操作状態と非操作状態の切換えが簡単となる。   According to this configuration, the operation state and non-operation state of the push plate 29 can be easily switched.

この第２実施形態においても、押し板２９の表裏両面を色分けするのが望ましい点は第１実施形態と同じである。   The second embodiment is the same as the first embodiment in that it is desirable to color-code both the front and back surfaces of the pressing plate 29.

参考形態（図９,１０参照）
第１、第２両実施形態では、押し板２９を、全圧抜き弁１０…を同時に開き操作するための操作体と、圧抜き弁１０…が開いた状態のまま作業が開始されることを防止するインターロック部材とに兼用する構成をとったのに対し、参考形態では圧抜き弁１０…は一つずつ別々に操作し、インターロック専用部材としてのインターロックプレート３４によってもっぱらインターロック機能のみを確保する構成をとっている。 Reference form (see Figs. 9 and 10)
In both the first and second embodiments, the operation is started while the push plate 29 is operated to open all the pressure relief valves 10 simultaneously and the pressure relief valves 10 are opened. In contrast, the pressure release valve 10 is operated separately one by one in the reference form, and only the interlock function is provided by the interlock plate 34 as an interlock dedicated member. It is configured to ensure.

すなわち、各圧抜き弁１０…は、上面側に操作子としての細長いノブ１０ａ…を備え、このノブ１０ａ…のほぼ９０°の回転操作によって開閉するように構成されている。具体的にはたとえば、図６に示す圧抜き弁１０において、操作子１７を回転自在に設け、その上面にノブ１０ａを取付けるとともに、弁体１６に対向する側壁に横穴状の通路を設け、操作子１７の回転によってこの通路を弁体１６の横穴２３に対して連通／遮断させる構造をとることができる。   That is, each pressure release valve 10 is provided with an elongated knob 10a as an operator on the upper surface side, and is configured to be opened and closed by rotating the knob 10a. Specifically, for example, in the pressure relief valve 10 shown in FIG. 6, the operation element 17 is rotatably provided, the knob 10 a is attached to the upper surface thereof, and a side hole-like passage is provided on the side wall facing the valve body 16. A structure in which this passage is communicated / blocked with respect to the lateral hole 23 of the valve body 16 by the rotation of the child 17 can be adopted.

一方、インターロックプレート３４の裏面に、ノブ１０ａ…と同じ間隔を置いて複数の突起３５…が設けられている。   On the other hand, a plurality of projections 35 are provided on the back surface of the interlock plate 34 at the same intervals as the knobs 10a.

この突起３５…は、間隔を置いて平行に配置された一対の突片３５ａ,３５ａから成り、ノブ１０ａが閉じ位置にある状態でのみ、図１０（ａ）に示すようにこの両突片３５ａ,３５ａ間にノブ１０ａ…が嵌まり込むように構成されている。   The projections 35 are made up of a pair of projecting pieces 35a, 35a arranged in parallel at a distance, and only when the knob 10a is in the closed position, as shown in FIG. 10 (a), the projecting pieces 35a. , 35a, the knob 10a is fitted.

いいかえれば、ノブ１０ａ…が開き状態にあるときは、図１０（ｂ）に示すようにノブ１０ａが両突片３５ａ,３５ａと干渉して間に嵌まり込めず、インターロックプレート３４を圧抜きブロック８（カバー３１）に正常に被せることができないし、ねじ止めすることもできないように構成されている。   In other words, when the knob 10a is in the open state, as shown in FIG. 10 (b), the knob 10a interferes with both the projecting pieces 35a and 35a and cannot be inserted between them, and the interlock plate 34 is depressurized. The block 8 (cover 31) cannot be normally covered and cannot be screwed.

従って、インターロックプレート３４が正常に装着できないことで圧抜き弁１０…が開き状態にあることが明確に示されるため、インターロック機能が確実に果たされる。   Accordingly, it is clearly shown that the pressure relief valves 10 are in an open state when the interlock plate 34 cannot be normally mounted, and thus the interlock function is reliably performed.

なお、インターロックプレート３４を圧抜きブロック８（カバー３１）に対し、ねじ止めではなく、第２実施形態のようにヒンジによって回動可能に取付けてもよい。   The interlock plate 34 may be attached to the pressure release block 8 (cover 31) so as to be rotatable by a hinge as in the second embodiment instead of screwing.

他の実施形態
（１） 圧抜き弁１０の具体的構造は上記実施形態で例示したもの以外に種々変更することができ、要は、操作子の押し操作によって圧抜きブロック８のメイン通路９をドレン通路１１に連通させる構造のものであればよい。 Specific structure of another embodiment (1) depressurization valves 10 may be variously modified in addition to those exemplified in the above embodiments, short, the main path of the pushing operation of the operation element thus depressurization block 8 Any structure may be used as long as 9 communicates with the drain passage 11 .

（２） 本発明は解体機に限らず、廃棄物等の運搬を行うスクラップローダ等、作業アタッチメントが複数のアタッチメントピースによって組立・分解自在に構成され、かつ、作業アタッチメントに油圧配管が設けられる各種作業機械に広く適用することができる。 ( 2) The present invention is not limited to a dismantling machine, and various types of work attachments such as a scrap loader that transports waste and the like can be assembled and disassembled by a plurality of attachment pieces, and hydraulic piping is provided on the work attachment. Can be widely applied to work machines.

また、本発明は作業アタッチメントに限らず、作業機械において油圧配管を複数の単位配管に分割し、これらを継手で接続する構成をとる部分にも適用することができる。   In addition, the present invention is not limited to work attachments, and can be applied to a part that has a configuration in which a hydraulic pipe is divided into a plurality of unit pipes and connected by joints in a work machine.

本発明の第１実施形態にかかる圧抜き装置とこれが取付けられた作業アタッチメントのブームの斜視図である。1 is a perspective view of a pressure relief device according to a first embodiment of the present invention and a boom of a work attachment to which the pressure release device is attached. 圧抜き装置の斜視図である。It is a perspective view of a pressure release apparatus. 圧抜き装置の圧抜き弁を開き操作した状態の斜視図である。It is a perspective view of the state which opened and operated the pressure release valve of the pressure release apparatus. 圧抜き装置の押し板を裏返し状態で圧抜きブロックに取付けた状態の斜視図である。It is a perspective view of the state which attached the press plate of the pressure release apparatus to the pressure release block in the reverse state. 圧抜き装置の水平断面図である。It is a horizontal sectional view of a pressure release device. 図５のＶＩ−ＶＩ線拡大断面図である。It is the VI-VI line expanded sectional view of FIG. 開弁状態の図６相当図である。FIG. 7 is a view corresponding to FIG. 6 in a valve open state. 本発明の第２実施形態にかかる圧抜き装置の斜視図である。It is a perspective view of the pressure release apparatus concerning 2nd Embodiment of this invention. 本発明の参考形態にかかる圧抜き装置の斜視図である。It is a perspective view of the pressure release apparatus concerning the reference form of this invention. （ａ）(ｂ)は同装置の開弁、閉弁両状態におけるインターロックプレートと圧抜き弁のノブの関係を示す図である。(A) (b) is a figure which shows the relationship between the interlock plate and the knob of a pressure relief valve in both the valve opening state and valve closing state of the apparatus.

８ 圧抜きブロック
９ メイン通路
１０ 圧抜き弁
１１ 圧抜き弁のドレン通路
１６ 同弁体
１７ 同操作子
１８ 同弁ケース
１９ 同コイルスプリング
２０ 同弁取付穴
２１ 同連通穴
２２ 同縦穴
２３ 同横穴
２４ 同周溝
２５ 同隙間
２６ 同油室
２７ 同ドレンポート
２８ 同シール
２９ 押し板（操作体）
３０ 突起（操作部）
３３ ヒンジ 8 Pressure relief block 9 Main passage 10 Pressure relief valve 11 Pressure relief valve drain passage 16 Same valve body 17 Same operation element 18 Same valve case 19 Same coil spring 20 Same valve mounting hole 21 Same communication hole 22 Same vertical hole 23 Same horizontal hole 24 Same groove 25 Same gap 26 Same oil chamber 27 Same drain port 28 Same seal 29 Push plate (operating body)
30 Protrusion (operation part)
33 hinges

Claims (5)

圧抜きブロックを備え、この圧抜きブロックには、複数本の油圧配管が接続される複数のメイン通路と、外部からの手動開き操作により油圧配管内の油を各メイン通路を介して抜く圧抜き弁と、この各圧抜き弁から抜かれた油を合流させて外部に導くドレン通路とを設け、上記各圧抜き弁に、外部から押し操作されてドレンポートを開く操作子を設け、かつ、すべての上記操作子を同時に押し操作する複数の操作部を備えた操作体を具備し、この操作体は、上記操作部で全操作子を押し操作した操作状態で上記圧抜きブロックに保持し得るように構成されたことを特徴とする油圧配管の圧抜き装置。 A pressure relief block is provided. In this pressure relief block, there are a plurality of main passages to which a plurality of hydraulic pipes are connected, and a pressure release that drains oil in the hydraulic pipes through each main passage by manual opening operation from the outside. A valve and a drain passage that joins the oil extracted from each pressure release valve and leads to the outside, and each pressure release valve is provided with an operator that is pushed from the outside to open the drain port, and all The operation body is provided with a plurality of operation sections that simultaneously push and operate the operation elements, and the operation body can be held in the pressure release block in an operation state in which all the operation elements are pushed by the operation section. A pressure relief device for hydraulic piping, characterized in that it is configured as described above . 上記操作体は、裏面に上記操作部が設けられ、裏返しの非操作状態で上記圧抜きブロックに保持し得るように構成されたことを特徴とする請求項１記載の油圧配管の圧抜き装置。 2. The depressurizing apparatus for hydraulic piping according to claim 1 , wherein the operating body is provided with the operating portion on the back surface and configured to be held by the depressurizing block in a non-operated state of being reversed . 上記操作体は、回動して表裏反転し得るように上記圧抜きブロックにヒンジを介して取付けられたことを特徴とする請求項２記載の油圧配管の圧抜き装置。 The operating body, depressurization system for a hydraulic pipe according to claim 2, wherein the mounting et a via a hinge to the depressurization block so as to reversed rotated. 上記操作体の表裏両面を色分けしたことを特徴とする請求項至２または３記載の油圧配管の圧抜き装置。 4. The depressurizing device for hydraulic piping according to claim 2 , wherein the front and back surfaces of the operating body are color-coded . 請求項１〜４のいずれか１項に記載の圧抜用装置の圧抜きブロックが複数本の油圧配管に跨って設けられ、この圧抜きブロックのメイン通路に各油圧配管が接続され、圧抜き弁を開き操作することにより油圧配管内の油をメイン通路及びドレン通路を介して外部に一括して抜くように構成されたことを特徴とする油圧配管構造。 The pressure relief block of the pressure relief device according to any one of claims 1 to 4 is provided across a plurality of hydraulic pipes, and each hydraulic pipe is connected to a main passage of the pressure relief block, A hydraulic piping structure characterized in that the valve is operated to open and the oil in the hydraulic piping is collectively discharged to the outside through a main passage and a drain passage .
JP2006297792A 2006-11-01 2006-11-01 Hydraulic pipe pressure release device and hydraulic pipe structure Expired - Fee Related JP4935301B2 (en)

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EP20070119211 EP1918593B1 (en) 2006-11-01 2007-10-24 Depressurization apparatus for hydraulic pipe and hydraulic pipe structure

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