JP5457769B2 - 1-channel hydraulic cylinder drive expansion head - Google Patents
1-channel hydraulic cylinder drive expansion head Download PDFInfo
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- JP5457769B2 JP5457769B2 JP2009209037A JP2009209037A JP5457769B2 JP 5457769 B2 JP5457769 B2 JP 5457769B2 JP 2009209037 A JP2009209037 A JP 2009209037A JP 2009209037 A JP2009209037 A JP 2009209037A JP 5457769 B2 JP5457769 B2 JP 5457769B2
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- 239000003921 oil Substances 0.000 claims description 42
- 239000010720 hydraulic oil Substances 0.000 claims description 9
- 238000009412 basement excavation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000004568 cement Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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Description
本願発明は、土木建設機械、工作機械、その他各種産業機械における作業機器を駆動する油圧シリンダの駆動回路、及びそれを用いた拡大ヘッドに関する。 The present invention relates to a drive circuit for a hydraulic cylinder that drives work equipment in civil engineering construction machines, machine tools, and other various industrial machines, and an expansion head using the same.
従来、例えば拡大ヘッドにおける拡大翼の拡開をはじめ、各種土木建設機械における各種作業機器の駆動手段として油圧シリンダを使用し、該油圧シリンダに外部の油圧源から圧力油を供給−戻りの２流路の油圧管路を通じて供給、排出して油圧シリンダを伸縮駆動させる駆動回路が広く使用されている。 Conventionally, for example, a hydraulic cylinder has been used as a driving means for various working machines in various civil engineering machines, including the expansion of an expansion blade in an expansion head, and pressure oil is supplied from an external hydraulic source to the hydraulic cylinder. 2. Description of the Related Art A drive circuit that supplies and discharges through a hydraulic line of a path to drive a hydraulic cylinder to expand and contract is widely used.
しかし、上記の油圧２流路型の駆動回路は、配管に費用がかかるばかりでなく、トラブルの発生が多くなり、特にアースオーガ下端に接続された拡大ヘッドの場合は、アースオーガの接続部分の構造が複雑となり、アースオーガ継ぎ足し時の接続、分離作業に手間のかかる欠点が大きかった。 However, the above hydraulic two-channel type drive circuit is not only expensive for piping but also causes troubles. Especially in the case of an enlarged head connected to the lower end of the earth auger, the connecting portion of the earth auger The structure was complicated, and the drawback of connecting and disconnecting the earth auger was great.
そこで、油圧シリンダに圧力油を供給するのみの１流路の油圧管路を配管し、油圧シリンダの戻りの駆動は土圧等の他の外力を利用して行うものが提案された。 In view of this, it has been proposed to provide a single hydraulic line that only supplies pressure oil to the hydraulic cylinder, and to drive the return of the hydraulic cylinder using other external forces such as earth pressure.
しかし、後者の提案による１流路型駆動回路では、配管構造が１流路の簡単なものとなる利点が得られるが、油圧シリンダの戻り駆動に確実さが欠ける難点が残されていた。 However, the one-channel type drive circuit according to the latter proposal has an advantage that the piping structure is simple with one channel, but there remains a problem that the return drive of the hydraulic cylinder is not reliable.
本発明は、掘削作業ロッドに装備された油圧シリンダ駆動式拡大ヘッドにおいて、１流路の油圧管路から供給される圧力油をもって、あたかも２流路の如く油圧シリンダに圧力油を供給して駆動する拡大ヘッドを提供することを課題とする。 This onset Ming, the hydraulic cylinder driven enlarged head that is provided on drilling operations rod, with the pressure oil supplied from the hydraulic line of the first flow path, to supply pressure oil to the though 2 flow path hydraulic cylinder as It is an object to provide an enlarged head to be driven.
本発明は、油圧シリンダの戻りの圧力油を地中に排出せずに、再使用を可能にすることを課題とする。 This onset bright, without discharging the pressure oil of the hydraulic cylinder returns to the ground, and an object thereof is to allow re-use.
上記課題解決の手段として、請求項１の発明は、ヘッドロッドの外側部に拡大翼（５）を拡縮揺動自在に支持すると共に、ヘッドロッド内に油圧シリンダを内装し、該油圧シリンダの伸縮駆動にて前記拡大翼（５）を拡縮させる構成とし、
外部から圧力油を供給すべく１流路の油圧管路（１５）を、流路切換弁（１６）を介して、前記油圧シリンダのロッド側スペースと、ピストン側スペースとにそれぞれ接続されたロッド側管路（１７）とピストン側管路（１８）とに分岐させ、
前記油圧シリンダのチューブ（７）のロッド側スペースおよびピストン側スペースの夫々には、ロッド側スペースまたはピストン側スペースからの戻り油を貯留室（２０）へ案内する戻り油案内管路（１９）を接続し、
前記１流路に外部から供給される圧力油の圧力変化により、前記流路切換弁（１６）を切換えて、圧力油を上記油圧シリンダのロッド側スペース及びピストン側スペースの一方へ選択的に供給可能とし、
もって、外部から所定圧の作動油の供給では、前記流路切換弁（１６）はロッド側切換管路（１７）から前記チューブ（７）のロッド側スペースへ送油して前記拡大翼（５）を拡開させると共に、前記チューブ（７）のピストン側スペースにある作動油は戻り油案内管路（１９）により貯留室（２０）へ送って貯留し、前記１流路の油圧管路（１５）へ供給する作動油の圧力を代えて、前記流路切換弁（１６）を前記ピストン側切換管路（１８）にポートを切替えることによりピストン側スペースへ送油し、作動油の油圧により前記拡大翼（５）を閉縮させる構成とした、
１流路型油圧シリンダ駆動式拡大ヘッドを提案する。
As a means for solving the above-mentioned problems, the invention of claim 1 is characterized in that the enlarged wing (5) is supported on the outer portion of the head rod so as to be able to expand and contract freely, and a hydraulic cylinder is housed in the head rod, and the hydraulic cylinder expands and contracts. a structure for scaling the expansion wings (5) by the drive,
A rod connected to a rod-side space and a piston-side space of the hydraulic cylinder via a passage switching valve (16) through a hydraulic passage (15) for supplying pressure oil from the outside. Branch to the side pipe line (17) and the piston side pipe line (18),
In each of the rod side space and the piston side space of the tube (7) of the hydraulic cylinder, there is a return oil guide line (19) for guiding the return oil from the rod side space or the piston side space to the storage chamber (20). connection,
The pressure change in the pressure oil supplied from the outside to the first flow path, and switches the flow channel switching valve (16), selectively supplying the pressure oil to one of the rod-side space and the piston-side space of the hydraulic cylinder possible and then,
Accordingly, when hydraulic oil of a predetermined pressure is supplied from the outside, the flow path switching valve (16) feeds oil from the rod side switching pipe (17) to the rod side space of the tube (7) and expands the wings (5 ) Is expanded, and the hydraulic oil in the piston-side space of the tube (7) is sent to the storage chamber (20) through the return oil guide line (19) for storage, and the one-way hydraulic line ( 15) The pressure of the hydraulic oil supplied to 15) is changed, and the flow path switching valve (16) is supplied to the piston side space by switching the port to the piston side switching pipe (18). The expansion wing (5) is configured to close and contract,
A one-pass hydraulic cylinder drive expansion head is proposed.
請求項２の発明は、請求項１において、貯留室（２０）には、該貯留室（２０）内の作動油を取り出せる開閉プラグ（２１）を設けた、
１流路型油圧シリンダ駆動式拡大ヘッドを提案する。
The invention of claim 2 is the storage chamber (20) according to claim 1, wherein the storage chamber (20) is provided with an open / close plug (21) capable of taking out the hydraulic oil in the storage chamber (20).
A one-pass hydraulic cylinder drive expansion head is proposed.
請求項１の発明では、外部から圧力油を供給する１流路の油圧管路（１５）を備えることにより、簡単な構造を維持することができ、しかも外部から供給する圧力油の圧力を変化させることにより流路切換弁（１６）を、油圧シリンダのロッド側スペースとピストン側スペースの一方へ選択的に供給可能に切替えさせて、あたかも２流路型のように油圧シリンダを確実に伸縮駆動させ、拡大翼の拡開のみならず閉縮も油圧シリンダにより行うことができ、拡縮の確実性を向上させることができるのである。 According to the first aspect of the present invention, a simple structure can be maintained by providing the hydraulic passage (15) for supplying pressure oil from the outside, and the pressure of the pressure oil supplied from the outside can be changed. As a result, the flow path switching valve (16) is switched so that it can be selectively supplied to either the rod side space or the piston side space of the hydraulic cylinder, so that the hydraulic cylinder can be reliably extended and retracted as if it were a two flow path type. In addition, not only the expansion blades can be expanded but also closed and contracted by the hydraulic cylinder, and the reliability of expansion and contraction can be improved .
請求項２の発明では、油圧シリンダからの戻りの圧力油を地中に排出することなく、貯留室（２０）に貯油することができ、それにより地中の造成物に障害を与えるようなことはなく、しかも貴重な作動油を清浄なまま貯留室から取り出して再使用に向けることができるようになり、経済的に極めて有利となる。 According to the second aspect of the present invention, the return pressure oil from the hydraulic cylinder can be stored in the storage chamber (20) without being discharged into the ground, thereby impairing the underground composition. In addition, valuable hydraulic oil can be taken out of the storage chamber while being clean and can be reused, which is extremely advantageous economically.
以下、本願発明の１流路型油圧シリンダ駆動式拡大ヘッドの例について説明する。図１の拡大ヘッド（１）において、そのヘッドロッドは、中空円筒状の主ロッド（２）の上端部に、同じく中空円筒状の副ロッド（３）をオス、メス継手により同一軸心線上に接続してあり、その主ロッド（２）下端部外側の直径方向相対する位置に形成されたブラケット（４）、（４）に、２本の拡大翼（５）、（５）の各基端部を軸（６）、（６）によりヘッドロッド縦断平面上で羽はばき状に揺動できるようにそれぞれ軸支してある。 Hereinafter, an example of the one-flow-path hydraulic cylinder driving type expansion head of the present invention will be described. In the enlarged head (1) of FIG. 1, the head rod is arranged on the same axial center line by the upper end of the hollow cylindrical main rod (2), and the same hollow cylindrical sub rod (3) by male and female joints. Connected to the brackets (4) and (4) formed at positions opposite to the diametrical direction outside the lower end of the main rod (2), the base ends of the two enlarged wings (5) and (5) The parts are pivotally supported by shafts (6) and (6) so that the wings can be swung in a vertical plane on the head rod.
上記拡大翼（５）、（５）を駆動すべき油圧シリンダのチューブ（７）は、上記主ロッド（２）の下部中空内に固定されており、このチューブ（７）の上端板に上端を固定された中空ロッド（８）を、上記チューブ（７）下端板ついで主ロッド（２）を貫通して下方へ突出し、突出下端に、二重らせん羽根からなる掘削ヘッド（９）のボス（１０）を固定支持させ、この中空ロッド（８）に摺動自在に被嵌されたピストン（１１）を上記チューブ（７）内に摺動自在に嵌合すると共に、ピストンロッド（１２）を上記中空ロッド（８）に摺動自在に被嵌して主ロッド（２）から下方へ突出させ、突出部分に固定されたブラケット（１３）、（１３）にリンク（１４）、（１４）の一端を回転自在に連結すると共に、リンク（１４）、（１４）の他端を上記拡大翼（５）、（５）の中間部に回転自在に連結してある。 The tube (7) of the hydraulic cylinder that should drive the expansion blades (5) and (5) is fixed in the lower hollow of the main rod (2), and the upper end of the tube (7) has an upper end. The fixed hollow rod (8) passes through the lower end plate of the tube (7) and then passes through the main rod (2) and protrudes downward, and at the lower end of the protrusion, the boss (10) of the excavation head (9) consisting of double spiral blades. ) Is fixedly supported, and the piston (11) slidably fitted to the hollow rod (8) is slidably fitted into the tube (7), and the piston rod (12) is slidably fitted to the hollow rod (8). The rod (8) is slidably fitted and protrudes downward from the main rod (2). One end of the link (14), (14) is attached to the bracket (13), (13) fixed to the protruding portion. It is connected freely and links (14), (14) The larger wing and the other end (5), are rotatably connected to the intermediate portion (5).
それにより上記ピストン（１１）を昇降駆動すれば、拡大翼（５）、（５）が図１（イ）の閉縮位置と、同図（ロ）の拡開位置とに拡縮揺動する。 Accordingly, when the piston (11) is driven up and down, the expansion blades (5) and (5) swing up and down between the closed position in FIG. 1 (a) and the expanded position in FIG.
上記油圧シリンダがわへ、外部の油圧源から油圧ポンプにより圧力油を供給する１流路の油圧管路（１５）が上記副ロッド（３）内まで延長され、その延長端に、該油圧管路（１５）を経て供給される圧力油の圧力変化により切換作動する流路切換弁（１６）、上記油圧シリンダのチューブ（７）のロッド側スペース及びピストン側スペースの一方へ選択的に圧力油を供給する切換管路（１７）、（１８）、油圧シリンダチューブ（７）の他方のスペースからの戻り油を貯留室（２０）へ案内する戻り油案内管路（１９）等を含む油圧シリンダの駆動回路（Ｐ）をロッド（２）、（３）内に内装してある。 A one-way hydraulic pipe (15) for supplying pressure oil from an external hydraulic source to the hydraulic cylinder by a hydraulic pump is extended into the auxiliary rod (3), and the hydraulic pipe is connected to the extended end of the hydraulic pipe. Pressure switch selectively to one of the rod side space and the piston side space of the tube (7) of the hydraulic cylinder, the flow path switching valve (16) which is switched by the pressure change of the pressure oil supplied through the passage (15). Cylinder including a return oil guide line (19) for guiding return oil from the other space of the hydraulic cylinder tube (7) to the storage chamber (20), etc. The drive circuit (P) is housed in the rods (2) and (3).
上記戻り油貯留室（２０）は、図１（イ）に示すように副ロッド（３）内に設けられ、その下端部に油を取り出すための開閉プラグ（２１）を設けてある。 The return oil storage chamber (20) is provided in the sub rod (3) as shown in FIG. 1 (a), and an open / close plug (21) for taking out oil is provided at the lower end thereof.
上記駆動回路（Ｐ）の詳細を図２に示す。今、便宜上１流路の油圧管路（１５）に供給される圧力油に、低圧：ａメガパスカル、中圧：ｂメガパスカル、高圧：ｃメガパスカルの３種を用意し、それに対応して流路切換弁（１６）のスプリングをｂメガパスカルに相当する強さ、リリーフ弁（２２）のスプリングをｃメガパスカルに相当する強さとする。 The details of the drive circuit (P) are shown in FIG. For convenience, three types of low pressure: a megapascal, medium pressure: b megapascal, and high pressure: c megapascal are prepared for the pressure oil supplied to the one-way hydraulic pipe (15) for convenience. The spring of the flow path switching valve (16) has a strength corresponding to b megapascal, and the spring of the relief valve (22) has a strength corresponding to c megapascal.
まず、図２（イ）のようにａメガパスカルの圧力油を油圧管路（１５）に供給すると、該圧力油は流路切換弁（１６）の図示のポート、ついで切換管路（１７）を経て油圧シリンダチューブ（７）のロッド側スペースに送られ、それによりピストン（１１）を上昇させ、該ピストン（１１）の上昇が図１のリンク（１４）、（１４）を介して拡大翼（５）、（５）を拡開させる。その際、油圧シリンダチューブ（７）のピストン側スペースにある圧力油は、管路（２３）、開いたパイロットチェック弁（２４）、ついで戻り油案内管路（１９）を経て戻り油貯留室（２０）に送られ、貯留される。 First, as shown in FIG. 2 (a), when a mega Pascal pressure oil is supplied to the hydraulic line (15), the pressure oil is supplied to the illustrated port of the flow path switching valve (16), and then to the switching line (17). 1 is sent to the rod side space of the hydraulic cylinder tube (7), thereby raising the piston (11), and the rising of the piston (11) is expanded via the links (14) and (14) of FIG. (5) Expand (5). At that time, the pressure oil in the piston side space of the hydraulic cylinder tube (7) passes through the pipe (23), the opened pilot check valve (24), and then the return oil guide pipe (19) to return oil storage chamber ( 20) and stored.
次に、ａメガパスカルに代え、ｂメガパスカルの圧力油を油圧管路（１５）に供給すると、流路切換弁（１６）のポートを（ロ）図のポートに切換える。 Next, when b-megapascal pressure oil is supplied to the hydraulic line (15) instead of the a-megapascal, the port of the flow path switching valve (16) is switched to the port shown in (b).
そこで、ｂメガパスカルに代え、ｃメガパスカルの圧力油を油圧管路（１５）に供給すると、（ハ）図のように該圧力油は流路切換弁（１６）の新たなポート、ついで切換管路（１８）、リリーフ弁（２２）を経て油圧シリンダチューブ（７）のピストン側スペースに送られ、それによりピストン（１１）を降下させ、該ピストン（１１）の降下が図１のリンク（１４）、（１４）を介して拡大翼（５）、（５）を閉縮させる。その際油圧シリンダチューブ（７）のロッド側スペースにある圧力油は、管路（２５）、開いたパイロットチェック弁（２６）ついで戻り油案内管路（１９）を経て貯留室（２０）に送られ、貯留される。 Therefore, when c-megapascal pressure oil is supplied to the hydraulic line (15) instead of b-megapascal, the pressure oil is switched to a new port of the flow path switching valve (16) as shown in FIG. It is sent to the piston side space of the hydraulic cylinder tube (7) through the pipe line (18) and the relief valve (22), thereby lowering the piston (11), and the lowering of the piston (11) is linked to the link ( 14) The enlarged wings (5) and (5) are closed via (14). At that time, the pressure oil in the rod side space of the hydraulic cylinder tube (7) is sent to the storage chamber (20) via the pipe line (25), the opened pilot check valve (26) and then the return oil guide pipe line (19). And stored.
上記拡大ヘッド（１）を掘削スクリューロッドの下端に接続して地盤に掘進し、所定深さにおいて、上記のような油圧操作により拡開した拡大翼（５）、（５）により拡大掘削を行いつつ、セメントミルクを孔内に注入して拡大球根を造成した後、上記のような拡大翼（５）、（５）を閉縮して地上に引き抜いたら、上記貯留室（２０）の開閉プラグ（２１）を開いて貯留された作動油を取り出し、これを油圧源に戻して再使用する。 The enlargement head (1) is connected to the lower end of the excavation screw rod to dig into the ground, and at a predetermined depth, enlargement excavation is performed with the enlargement blades (5) and (5) expanded by the hydraulic operation as described above. On the other hand, after the cement milk is injected into the hole to form the enlarged bulb, the above-described expansion wings (5), (5) are closed and pulled out to the ground. (21) is opened and the stored hydraulic fluid is taken out and returned to the hydraulic pressure source for reuse.
１ 拡大ヘッド
２ 主ロッド
３ 副ロッド
５ 拡大翼
７ 油圧シリンダチューブ
１５ １流路油圧管路
１６ 流路切換弁
１７、１８ 切換管路
１９ 戻り油案内管路
２０ 貯留室
２１ 開閉プラグ
DESCRIPTION OF SYMBOLS 1 Expansion head 2 Main rod 3 Sub rod 5 Expansion wing 7 Hydraulic cylinder tube 15 1 flow path hydraulic line 16 Flow path switching valve 17, 18 switching line 19 Return oil guide line 20 Storage chamber 21 Opening and closing plug
Claims (2)
外部から圧力油を供給すべく１流路の油圧管路（１５）を、流路切換弁（１６）を介して、前記油圧シリンダのロッド側スペースと、ピストン側スペースとにそれぞれ接続されたロッド側管路（１７）とピストン側管路（１８）とに分岐させ、
前記油圧シリンダのチューブ（７）のロッド側スペースおよびピストン側スペースの夫々には、ロッド側スペースまたはピストン側スペースからの戻り油を貯留室（２０）へ案内する戻り油案内管路（１９）を接続し、
前記１流路に外部から供給される圧力油の圧力変化により、前記流路切換弁（１６）を切換えて、圧力油を上記油圧シリンダのロッド側スペース及びピストン側スペースの一方へ選択的に供給可能とし、
もって、外部から所定圧の作動油の供給では、前記流路切換弁（１６）はロッド側切換管路（１７）から前記チューブ（７）のロッド側スペースへ送油して前記拡大翼（５）を拡開させると共に、前記チューブ（７）のピストン側スペースにある作動油は戻り油案内管路（１９）により貯留室（２０）へ送って貯留し、前記１流路の油圧管路（１５）へ供給する作動油の圧力を代えて、前記流路切換弁（１６）を前記ピストン側切換管路（１８）にポートを切替えることによりピストン側スペースへ送油し、作動油の油圧により前記拡大翼（５）を閉縮させる構成とした、
１流路型油圧シリンダ駆動式拡大ヘッド。 The expansion blades (5) on the outside portion of the head rod as well as scaled swingably supported, and decorated the hydraulic cylinder into the head rod, and configured to scaling the expansion blades (5) in telescopic driving of the hydraulic cylinder ,
A rod connected to a rod-side space and a piston-side space of the hydraulic cylinder via a passage switching valve (16) through a hydraulic passage (15) for supplying pressure oil from the outside. Branch to the side pipe line (17) and the piston side pipe line (18) ,
In each of the rod side space and the piston side space of the tube (7) of the hydraulic cylinder, there is a return oil guide line (19) for guiding the return oil from the rod side space or the piston side space to the storage chamber (20). connection,
The pressure change in the pressure oil supplied from the outside to the first flow path, and switches the flow channel switching valve (16), selectively supplying the pressure oil to one of the rod-side space and the piston-side space of the hydraulic cylinder possible and then,
Accordingly, when hydraulic oil of a predetermined pressure is supplied from the outside, the flow path switching valve (16) feeds oil from the rod side switching pipe (17) to the rod side space of the tube (7) and expands the wings (5 ) Is expanded, and the hydraulic oil in the piston-side space of the tube (7) is sent to the storage chamber (20) through the return oil guide line (19) for storage, and the one-way hydraulic line ( 15) The pressure of the hydraulic oil supplied to 15) is changed, and the flow path switching valve (16) is supplied to the piston side space by switching the port to the piston side switching pipe (18). The expansion wing (5) is configured to close and contract,
1-channel hydraulic cylinder drive expansion head.
１流路型油圧シリンダ駆動式拡大ヘッド。 In Claim 1, the storage chamber (20) is provided with an open / close plug (21) capable of taking out the hydraulic oil in the storage chamber (20) .
1-channel hydraulic cylinder drive expansion head.
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