JP3903273B2 - Hydraulic source supply device for gripper in medium digging equipment - Google Patents

Hydraulic source supply device for gripper in medium digging equipment Download PDF

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JP3903273B2
JP3903273B2 JP03983498A JP3983498A JP3903273B2 JP 3903273 B2 JP3903273 B2 JP 3903273B2 JP 03983498 A JP03983498 A JP 03983498A JP 3983498 A JP3983498 A JP 3983498A JP 3903273 B2 JP3903273 B2 JP 3903273B2
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Prior art keywords
casing
gripper
hydraulic
drum
winch
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JPH11222857A (en
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衛 浜野
英人 田中
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Sanwa Kizai Co Ltd
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Sanwa Kizai Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、回転されつつ地中に圧入されるケーシングの内側地盤を、該ケーシング内面にグリッパーにより着脱自在に固定された掘削機により掘削する中掘り装置において、上記グリッパーを油圧シリンダにより開閉駆動するため該シリンダに油圧を供給するための油圧源供給装置に関する。
【0002】
【従来の技術】
従来、この種の中掘り装置におけるグリップ装置として、互に摺動自在に差し合わされた一対の筒からなる伸縮筒の一方の筒に、掘削機として掘削バケットを吊支すると共に、他方の筒にウエイトを積載し、上記一方の筒に複数のグリッパーを開閉自在に支持すると共に上記他方の筒の摺動により上記グリッパーを開閉駆動させるリンク機構を設け、そしてクレーンにより上記伸縮筒を掘削バケットを下にして吊支するときは、該伸縮筒が掘削バケットの重量により伸長し、それにより上記グリッパーが閉じるが、上記掘削バケットを接地したときは、上記伸縮筒がウエイトにより縮小し、それにより上記グリッパーが開いてケーシング内面に圧接可能となる構造のものが知られている。
【0003】
しかし、上記の従来装置は、ケーシング内面に対するグリッパーの圧接力がウエイトの重量に依存しているため、グリッパーの確実な圧接を得るために装置全体が重量化し、作業性が悪くなる欠点があり、また掘削バケットが接地して伸縮筒を十分に縮小させたときグリッパーがケーシング内面に圧接するから、接地面が傾斜している場合等グリッパーが圧接位置まで十分に開かないことがあり、さらに中掘り装置全体を常時クレーンに吊支しておく必要があるため、ワイヤロープの管理が煩雑となる等の難点がある。
【0004】
【発明が解決しようとする課題】
本発明は、従来装置の欠点を解消することを課題とする。
【0005】
【課題を解決するための手段】
上記課題解決のため、本発明は、
ウインチ装置のロープにより昇降自在に吊支されてケーシング内に挿入されたホルダーに、中掘り用掘削機と、油圧シリンダにより開閉されて上記ケーシング内面に接離駆動されるグリッパーとを備えた回転圧入ケーシングの中掘り装置において、
上記ホルダーに、吊りドラムおよび上記グリッパー接離駆動用油圧シリンダに油圧を給排すべき油圧ポンプを設置すると共に、上記油圧ポンプを上記吊りドラムに該吊りトラムから回転伝達可能に連継し、
上記ウインチ装置を上記ケーシングの上端部に着脱自在に支持させると共に、そのロープを上記吊りドラムに掛け回し、該ウインチ駆動により上記吊りドラムを無回転で昇降および左右回転可能にした、
中掘り装置におけるグリッパー用油圧源供給装置を提案する。
【0006】
本発明における「中掘り用掘削機」には、スクリュー型掘削機、バケット掘削機その他種々の掘削機が使用される。
以下図面を参照して本発明の実施例について説明する。
【0007】
【実施例】
図1において、地上に接地されたケーシング回転圧入装置(P)における圧入用油圧ジャッキ(a)…により昇降され且つ回転用油圧モータ(b)、(b)により回転される回転筒(c)内にケーシング(1)を挿入して垂直に把持させ、このケーシングの中掘り装置(B)として、ウインチ装置のワイヤロープに吊支されてケーシング(1)内に昇降自在に挿入されたホルダー(2)の下端に、本例では中掘り用掘削機として下端に刃を有する短い二重スクリュー羽根からなるスクリュー掘削ヘッド(3)を固定すると共に、該ホルダー(2)をケーシング(1)内面に着脱自在に固定するため油圧シリンダにより開閉駆動されるグリッパー(4)を備え、そして、上記グリッパー(4)開閉駆動用油圧シリンダに対する本発明の油圧源供給装置として、油圧ポンプ(5)、該油圧ポンプ(5)を連動させるべき吊りドラム(7)、および該吊りドラム(7)を正逆回転させるべきウインチ装置(6)を装備してある。
【0008】
まず、上記グリッパー(4)は、特に図6に示すように、互に同一曲率の弧状外周面を有するほぼ3分の1円弧の湾曲板からなる3枚のグリップ板のうち1枚を固定グリップ板(8)として上記ホルダー(2)に固定し、他の2枚を可動グリップ板(8’)、(8’)として、それらの一端部を上記固定グリップ板(8)の両端部に軸(9)、(9)により揺動自在に連結すると共に、両可動グリップ板(8’)、(8’)の他端部間に2本のグリッパー開閉駆動用油圧シリンダ(10)、(10)の各基部およびそれらのラム(11)、(11)先端をピン(12)、(13)により連結したものである。
【0009】
上記油圧ポンプ(5)は、正逆回転型であって正転時に第2油口から油を吸入して第1油口から圧油として吐出し、逆転時に第1油口から油を吸入して第2油口から圧油として吐出するタイプのもので、図4、5に示すように上記ホルダー(2)上面の一側部に接地されている。その油圧回路も上記ホルダー(2)に配置されるが、その構成は図8に示すように、オイルタンク(14)から油圧ポンプ(5)の第1油口(15)および第2油口(16)にそれぞれ管(17)、(18)を逆止弁(19)、(20)を介して接続すると共に、第1油口(15)から油圧シリンダ(10)、(10)のヘッドがわ空間に管(21)を、第2油口(16)から油圧シリンダ(10)、(10)のロッドがわ空間に管(22)をそれぞれ逆止弁(23)、(24)を介して接続し、さらに油圧シリンダ(10)、(10)のヘッドがわ空間からオイルタンク(14)に管(25)を、油圧シリンダ(10)、(10)のロッドがわ空間からオイルタンク(14)に管(26)をそれぞれリリーフ弁(27)、(28)を介して接続してある。(29)はアキュームレータである。
【0010】
上記ホルダー(2)上面の他側部に図2、4、5に示すように支柱(30)を起立し、該支柱(30)の下部に吊りドラム(7)を、中間部に補助ドラム(7’)を、最上部に案内ドラム(31)をそれぞれブラケットを介して回転自在に軸支し、上方のウインチ装置から引き出したワイヤロープ(32)を上記案内ドラム(31)を経て吊りドラム(7)、補助ドラム(7’)ついで吊りドラム(7)と掛け回して上方へ導き、このロープ(32)を巻きドラム(39’)から(39)へ、または(39)から(39’)へ走行させることにより吊りドラム(7)を正逆回転させるようにし、そして図5のように上記吊りドラム(7)の軸を増速歯車装置(33)に接続し、さらに上記歯車装置(33)の出力軸をサイクロ増速機(34)に接続し、該増速機(34)の出力軸を上記油圧ポンプ(5)の入力軸に接続してある。
【0011】
上記ウインチ装置(6)の構造は次のようである。図1、2、3において、ワイヤロープ通し口(36)を中央部に開口した支持台(35)の上面一側にギヤボックス(37)を、他側部に一対のブラケット(38)、(38’)をそれぞれ突設し、両ブラケット(38)、(38’)とボックス(37)下部に互に同径の一対の巻きドラム(39)、(39’)の軸(40)、(40’)を該ボックス(37)内に貫通して水平に支承すると共に、ボックス内において両ドラム軸(40)、(40’)に互に同径の大歯車(41)、(41’)をそれぞれ固着し、一方上記ボックス(37)の前面一側上部に正逆回転式のウインチ駆動用油圧モータ(42)を設置し、該モータ(42)の出力軸(43)のボックス(37)内延長部に小歯車(44)を固着すると共に、上記出力軸(43)の下位に支承された軸(45)に、上記小歯車(44)とかみ合う大歯車(46)、および上記大歯車(41’)とかみ合う小歯車(47)を固着し、それにより上記油圧モータ(42)から巻きドラム(39’)への減速歯車列を構成している。
【0012】
他方の巻きドラム(39)の回転方向を一方の巻きドラム(39’)と同方向および反対方向へ変更する逆転機構として、逆T字状の2枚の細長板を小間隔をあけた平行状態で上下端部で連結してなるスライド枠(48)を、上記大歯車(41)、(41’)の間において上部および下部案内枠(49)(49)、(50)(50)により上下摺動自在に支持し、該スライド枠(48)の両細長板間中間部に歯車(51)を、下端部に互にかみ合う歯車(52)、(52)をそれぞれ回転自在に軸支し、上記スライド枠(48)を降下させたときは、上記歯車(51)が上記大歯車(41)、(41’)にかみ合って巻きドラム(39)、(39’)を同一周速度で同方向へ回転させ、また上記スライド枠(48)を上昇させたときは、上記歯車(51)に代って歯車(52)、(52)が上記大歯車(41)、(41’)にかみ合って巻きドラム(39)、(39’)を同一周速度で反対方向へ回転させるようにしてある。
【0013】
上記スライド枠(48)の昇降駆動手段として、上記ギヤボックス(37)の上板内面に逆転用油圧シリンダ(53)を垂直に取りつけ、そのピストンロッド先端を上記スライド枠(48)に連結してある。
【0014】
上記のようなウインチ装置の一方の巻きドラム(39’)に一端がわを巻かれたワイヤロープ(32)を下方へ引き出して上述のように吊りドラム(7)および補助ドラム(7’)に掛け回して上方へ導き、ついで他方の巻きドラム(39)に巻きつけている。通常は、上記のように中掘り装置(B)をロープ(32)で吊ったウインチ装置(6)をクレーン等により吊支して使用に備える。
【0015】
(54)…は、上記支持台(35)をケーシング(1)上端に保持するため、該支持台(35)の周縁に等間隔で4枚突設された受け板で、先端部にそれぞれ固定ボルト(55)…を螺合してある。
【0016】
上例の作用を使用例とともに次に説明する。ケーシング回転圧入装置(P)によりケーシング(1)を回転させつつ地中に間欠的に圧入していき、それと共にハンマグラブ等によりケーシング(1)内の地盤を掘削し、掘削土砂を排出していく。
【0017】
硬い地盤に至り、ハンマグラブ等ではケーシング内を掘削できないときは、ケーシング(1)の回転圧入を一旦停止し、ハンマグラブ等に代え本装置をクレーンにより移動させて中掘り装置(B)をケーシング(1)内へ降下させると共にウインチ装置(6)を図1、2のように上記受け板(54)…によりケーシング(1)上端にのせ、固定ボルト(55)…をケーシング(1)面に締着して固定する。
【0018】
上記作業に先だち、ウインチ装置(6)における逆転用油圧シリンダ(53)の縮小駆動によりスライド枠(48)を上昇させて歯車(52)、(52)を大歯車(41)、(41’)にかみ合わせ、その状態でウインチ駆動用油圧モータ(42)を正回転(図1、3時計方向回転)させ、小歯車(44)から大歯車(46)、小歯車(47)、大歯車(41’)を介して巻きドラム(39’)を時計方向へ、上記大歯車(41’)から歯車(52)、(52)、大歯車(41)を介して巻きドラム(39)を反時計方向へそれぞれ回転させ、それにより図7(イ)のようにワイヤロープ(32)を両巻きドラム(39)、(39’)に同一周速度で巻き取って(その間吊りドラム(7)は無回転)中掘り装置(B)を上昇させておく。
【0019】
次にウインチ駆動用油圧モータ(42)を逆回転(図1、3反時計方向回転)させ、同図(ロ)のように巻きドラム(39’)を反時計方向へ、巻きドラム(39)を時計方向へそれぞれ回転させ、それによりワイヤロープ(32)を巻き戻して(その間吊りドラム(7)は無回転)中掘り装置(B)を降下させ、その掘削ヘッド(3)を接地直前または接地位置におく。
【0020】
次に逆転用油圧シリンダ(53)の伸長駆動により歯車(51)を大歯車(41)、(41’)にかみ合わせ、その状態で油圧モータ(42)を逆回転させ、同図(ハ)のように巻きドラム(39’)、(39)を同一周速度でともに反時計方向へ回転させてワイヤロープ(32)を巻きドラム(39’)から(39)へ走行させ、それにより吊りドラム(7)を正回転(時計方向回転)させ(その間中掘り装置(B)は無昇降)、この吊りドラム(7)の回転が増速装置(33)、(34)により増速されて油圧ポンプ(5)の入力軸に伝達され、それにより油圧ポンプ(5)が正回転して図8における第2油口(16)から吸入した油を第1油口(15)から圧油としてグリッパー開閉用油圧シリンダ(10)、(10)のヘッドがわ空間に供給し、グリッパー(4)を開いてケーシング(1)内面に圧接させる。
【0021】
かくして掘削ヘッド(3)が、回転圧入されるケーシング(1)とともに回転しつつ圧入され、ケーシング(1)内の硬い地盤を掘削する。
【0022】
上記ウインチ駆動用油圧モータ(42)は、上記グリッパー駆動用油圧シリンダ(10)、(10)が伸びきった後駆動を停止するが、該シリンダ(10)、(10)に供給された油は回路内の逆止弁(23)により逆流を阻止されてシリンダ(10)、(10)を伸長状態に維持する。なお上記シリンダ(10)、(10)に余分に供給された油はリリーフ弁(27)からタンク(14)に戻される。
【0023】
上記グリッパー(4)の圧接を解除する場合は、上記ウインチ駆動用油圧モータ(42)を正回転させ、同図(ニ)のように巻きドラム(39’)、(39)を同一周速度でともに時計方向へ回転させてワイヤロープ(32)を巻きドラム(39)から(39’)ヘ走行させ、それにより吊りドラム(7)を逆回転させ、この吊りドラム(7)の回転が増速されて油圧ポンプ(5)に伝達され、それにより該ポンプ(5)が逆回転して図8における第1油口(15)から吸入した油を第2油口(16)から圧油としてグリッパー開閉用油圧シリンダ(10)、(10)のロッドがわ空間に供給し、グリッパー(4)を閉じてケーシング(1)への圧接を解く。
【0024】
【発明の効果】
本発明の中掘り装置におけるグリッパー用油圧源供給装置によれば、中掘り装置を吊支するウインチ装置の駆動を利用して油圧ポンプを回転させることによりグリッパーを開閉するようにしたので、従来のグリッパー装置に比較して装置の軽量化を実現することができる。しかも本発明によれば、ウインチ装置はケーシングの上端部に支持させるから、中掘り時には中掘り装置をクレーンで吊支する必要がなく、従来のようなワイヤロープの管理が煩雑となる欠点が解消し、またグリッパーの開閉駆動は、掘削機の接地と無関係に、ウインチ装置のウインチ駆動により行うから、従来のような接地面が傾斜している場合の難点も生じない。
【図面の簡単な説明】
【図1】中掘り装置を装着されたケーシングの一部省略した一部縦断正面図である。
【図2】図1のII−II線一部省略拡大断面図である。
【図3】図2のIII−III線断面図である。
【図4】図2のIV−IV線断面図である。
【図5】図2のV−V線断面図である。
【図6】図2のVI−VI線断面図である。
【図7】(イ)、(ロ)、(ハ)、(ニ)油圧源供給装置のウインチ駆動を示す各略線図である。
【図8】油圧回路図である。
【符号の説明】
1 ケーシング
2 ホルダー
3 スクリュー掘削ヘッド
4 グリッパー
5 油圧ポンプ
6 ウインチ装置
7 吊りドラム
10 グリッパー開閉駆動用油圧シリンダ
32 ワイヤロープ
B 中掘り装置
[0001]
BACKGROUND OF THE INVENTION
The present invention provides an internal excavator that excavates an inner ground of a casing that is press-fitted into the ground while being rotated by an excavator that is detachably fixed to the inner surface of the casing by a gripper, and the gripper is driven to open and close by a hydraulic cylinder. Therefore, the present invention relates to a hydraulic pressure supply device for supplying hydraulic pressure to the cylinder.
[0002]
[Prior art]
Conventionally, as a grip device in this kind of medium digging device, a drilling bucket is suspended as one excavator on one cylinder of a pair of telescopic cylinders slidably fitted to each other, and on the other cylinder A link mechanism is provided for loading and holding a plurality of grippers on the one cylinder so as to be opened and closed, and for driving the grippers to open and close by sliding the other cylinder. When the drilling bucket is suspended, the telescopic cylinder expands due to the weight of the excavating bucket, thereby closing the gripper. However, when the excavating bucket is grounded, the telescopic cylinder is contracted by a weight, whereby the gripper There is a known structure that opens and can be pressed against the inner surface of the casing.
[0003]
However, the above-mentioned conventional device has a defect that the gripping force of the gripper with respect to the inner surface of the casing depends on the weight of the weight. In addition, when the excavating bucket is grounded and the telescopic cylinder is sufficiently reduced, the gripper is pressed against the inner surface of the casing, so the gripper may not fully open to the pressed position, such as when the grounding surface is inclined, and Since it is necessary to suspend the entire apparatus on a crane at all times, there is a problem that the management of the wire rope becomes complicated.
[0004]
[Problems to be solved by the invention]
An object of the present invention is to eliminate the drawbacks of conventional devices.
[0005]
[Means for Solving the Problems]
To solve the above problems, the present invention provides:
Rotating press-fitting provided with an excavator for digging and a gripper that is opened and closed by a hydraulic cylinder and driven to contact with and separate from the inner surface of the casing in a holder that is suspended and supported by a rope of a winch device and inserted into the casing. In the casing digging device,
The holder is provided with a hydraulic pump that should supply and discharge hydraulic pressure to and from the suspension drum and the gripper contact / separation drive hydraulic cylinder, and the hydraulic pump is connected to the suspension drum so that rotation can be transmitted from the suspension tram,
The winch device is detachably supported on the upper end of the casing, and the rope is hung around the suspension drum, and the suspension drum can be moved up and down and rotated left and right without rotation by driving the winch.
A gripper hydraulic power source supply device for a medium digging device is proposed.
[0006]
For the “excavator for medium digging” in the present invention, a screw-type excavator, a bucket excavator, and other various excavators are used.
Embodiments of the present invention will be described below with reference to the drawings.
[0007]
【Example】
In FIG. 1, in a rotary cylinder (c) which is moved up and down by a press-fitting hydraulic jack (a) in a casing rotary press-fitting device (P) grounded on the ground and rotated by a rotary hydraulic motor (b), (b). The casing (1) is inserted into and vertically held, and as a casing digging device (B), a holder (2) suspended by a wire rope of the winch device and inserted in the casing (1) so as to be movable up and down. In this example, a screw excavation head (3) comprising a short double screw blade having a blade at the lower end is fixed to the lower end of the casing (1), and the holder (2) is attached to and detached from the inner surface of the casing (1). A gripper (4) that is driven to open and close by a hydraulic cylinder to be freely fixed is provided, and the hydraulic power source of the present invention to the gripper (4) hydraulic cylinder for opening and closing drive is provided. As an apparatus, a hydraulic pump (5), suspension drum (7) to be interlocked with the hydraulic pump (5), and the hanging Ri Aru drum (7) is equipped with a winch device to be normally and reversely rotated (6).
[0008]
First, as shown in FIG. 6, the gripper (4) is a grip for fixing one of three grip plates made of curved plates of approximately one third arcs having arcuate outer peripheral surfaces having the same curvature. The plate (8) is fixed to the holder (2), the other two are movable grip plates (8 ′) and (8 ′), and one end of each is pivoted to both ends of the fixed grip plate (8). (9) and (9) are swingably connected and two gripper opening / closing hydraulic cylinders (10), (10) between the other end portions of both movable grip plates (8 ′) and (8 ′). ) And their rams (11), (11) tips are connected by pins (12), (13).
[0009]
The hydraulic pump (5) is a forward / reverse rotation type and sucks oil from the second oil port during forward rotation and discharges it as pressure oil from the first oil port, and sucks oil from the first oil port during reverse rotation. And is discharged from the second oil port as pressure oil, and is grounded to one side of the upper surface of the holder (2) as shown in FIGS. The hydraulic circuit is also arranged in the holder (2). As shown in FIG. 8, the hydraulic circuit is configured from the oil tank (14) to the first oil port (15) and the second oil port ( 16) pipes (17) and (18) are connected via check valves (19) and (20), respectively, and the heads of the hydraulic cylinders (10) and (10) are connected from the first oil port (15). The pipe (21) is inserted into the space and the rod of the hydraulic cylinder (10) and (10) from the second oil port (16) is connected to the space (22) through the check valves (23) and (24), respectively. Furthermore, the pipes (25) are connected to the oil tank (14) from the head space of the hydraulic cylinders (10), (10), and the oil tanks (10), (10) are connected to the oil tank (10). 14) to pipe (26) via relief valves (27) and (28), respectively. We are continue to. (29) is an accumulator.
[0010]
As shown in FIGS. 2, 4 and 5, the support (30) is erected on the other side of the upper surface of the holder (2), a suspension drum (7) is provided at the bottom of the support (30), and an auxiliary drum ( 7 '), a guide drum (31) is pivotally supported on the uppermost part via brackets, and a wire rope (32) pulled out from the upper winch device is passed through the guide drum (31) to the hanging drum ( 7) Auxiliary drum (7 ') and then hanging around the suspension drum (7) and leading upward, and this rope (32) from the winding drum (39') to (39) or (39) to (39 ') , The suspension drum (7) is rotated forward and backward, and the shaft of the suspension drum (7) is connected to the speed increasing gear device (33) as shown in FIG. ) Output shaft connected to the cyclo gearbox (34) The output shaft of the speed increaser (34) is connected to the input shaft of the hydraulic pump (5).
[0011]
The structure of the winch device (6) is as follows. 1, 2 and 3, a gear box (37) is provided on one side of the upper surface of a support base (35) having a wire rope passage opening (36) opened in the center, and a pair of brackets (38), ( 38 ′) and a pair of winding drums (39), (39 ′) having the same diameter at the bottom of both brackets (38), (38 ′) and the box (37), 40 ') penetrates into the box (37) and is horizontally supported, and the large gears (41), (41') having the same diameter as the drum shafts (40), (40 ') in the box. On the other hand, a forward / reverse rotating winch drive hydraulic motor (42) is installed on the upper part of the front side of the box (37), and the box (37) of the output shaft (43) of the motor (42) is installed. The small gear (44) is fixed to the inner extension, and the lower part of the output shaft (43). A large gear (46) that meshes with the small gear (44) and a small gear (47) that meshes with the large gear (41 ′) are fixed to the received shaft (45), thereby the hydraulic motor (42). Constitutes a reduction gear train from to the winding drum (39 ').
[0012]
As a reverse rotation mechanism that changes the direction of rotation of the other winding drum (39) in the same direction as the one winding drum (39 ') and in the opposite direction, two inverted T-shaped elongated plates are in a parallel state with a small interval The upper and lower guide frames (49), (49), (50), and (50) are moved up and down between the large gears (41) and (41 ′). Supporting slidably, the gear (51) and the gears (52), (52) meshing with each other at the lower end of the slide frame (48) are rotatably supported on the intermediate portion between the two elongated plates, When the slide frame (48) is lowered, the gear (51) meshes with the large gears (41) and (41 ′), and the winding drums (39) and (39 ′) are moved in the same direction at the same peripheral speed. When the slide frame (48) is raised, the gear ( In place of 51), the gears (52) and (52) mesh with the large gears (41) and (41 ') so that the winding drums (39) and (39') rotate in the opposite direction at the same peripheral speed. It is.
[0013]
As a drive mechanism for raising and lowering the slide frame (48), a reverse hydraulic cylinder (53) is vertically attached to the inner surface of the upper plate of the gear box (37), and the piston rod tip is connected to the slide frame (48). is there.
[0014]
The wire rope (32) having one end wound around one winding drum (39 ') of the winch device as described above is pulled downward to be used as the suspension drum (7) and the auxiliary drum (7') as described above. It is wound around and guided upward, and then wound around the other winding drum (39). Usually, the winch device (6) in which the digging device (B) is suspended by the rope (32) as described above is suspended by a crane or the like for use.
[0015]
(54)... Are four receiving plates provided at equal intervals on the periphery of the support base (35) to hold the support base (35) at the upper end of the casing (1), and are fixed to the front ends. Bolts (55) are screwed together.
[0016]
Next, the operation of the above example will be described together with a usage example. The casing (1) is intermittently press-fitted into the ground while rotating the casing (1) by the casing rotary press-fitting device (P), and at the same time, the ground in the casing (1) is excavated by a hammaglab and the excavated soil is discharged. .
[0017]
When the hard ground is reached and the inside of the casing cannot be excavated by the hammaglab or the like, the rotary press-fitting of the casing (1) is temporarily stopped and the apparatus is moved by a crane instead of the hammaglab or the like to move the intermediate digging device (B) to the casing (1 1) and the winch device (6) is placed on the upper end of the casing (1) by the receiving plate (54) as shown in FIGS. 1 and 2, and the fixing bolt (55) is fastened to the casing (1) surface. And fix.
[0018]
Prior to the above operation, the slide frame (48) is raised by the reduction drive of the reverse rotation hydraulic cylinder (53) in the winch device (6) to turn the gears (52), (52) into the large gears (41), (41 '). In this state, the winch drive hydraulic motor (42) is rotated in the forward direction (FIG. 1, 3 clockwise), and the small gear (44) to the large gear (46), the small gear (47), and the large gear (41 ') Through the winding drum (39') in the clockwise direction and from the large gear (41 ') through the gears (52), (52) and the large gear (41) in the counterclockwise direction. As shown in FIG. 7 (a), the wire rope (32) is wound around the both winding drums (39) and (39 ') at the same circumferential speed (while the hanging drum (7) is not rotating). ) Raise the inside digging device (B).
[0019]
Next, the winch drive hydraulic motor (42) is rotated in the reverse direction (FIG. 1, 3 counterclockwise), and the winding drum (39 ′) is rotated counterclockwise as shown in FIG. Respectively, thereby unwinding the wire rope (32) (while the suspension drum (7) is not rotating), lowering the digging device (B) and setting the digging head (3) immediately before grounding or Place in ground position.
[0020]
Next, the gear (51) is engaged with the large gears (41) and (41 ′) by the extension drive of the hydraulic cylinder for reverse rotation (53), and in this state, the hydraulic motor (42) is rotated in the reverse direction. Thus, the winding drums (39 ′) and (39) are rotated counterclockwise at the same peripheral speed so that the wire rope (32) travels from the winding drum (39 ′) to (39). 7) is rotated forward (clockwise) (while the digging device (B) is not moved up and down), and the rotation of the suspension drum (7) is increased by the speed increasing devices (33) and (34), and the hydraulic pump (5) is transmitted to the input shaft, so that the hydraulic pump (5) rotates forward and the oil sucked from the second oil port (16) in FIG. 8 is opened and closed as pressure oil from the first oil port (15). Hydraulic cylinder (10), head of (10) is in space Feeding to the casing by opening the gripper (4) (1) is pressed against the inner surface.
[0021]
Thus, the excavation head (3) is press-fitted while rotating together with the casing (1) to be press-fitted, and excavates the hard ground in the casing (1).
[0022]
The winch drive hydraulic motor (42) stops driving after the gripper drive hydraulic cylinders (10) and (10) are fully extended, but the oil supplied to the cylinders (10) and (10) Backflow is blocked by the check valve (23) in the circuit, and the cylinders (10) and (10) are maintained in the extended state. The extra oil supplied to the cylinders (10) and (10) is returned from the relief valve (27) to the tank (14).
[0023]
In order to release the pressure contact of the gripper (4), the winch drive hydraulic motor (42) is rotated forward, and the winding drums (39 ') and (39) are moved at the same peripheral speed as shown in FIG. Both are rotated clockwise to run the wire rope (32) from the winding drum (39) to (39 '), thereby rotating the suspension drum (7) in reverse, and the rotation of the suspension drum (7) is increased. Is transmitted to the hydraulic pump (5), whereby the pump (5) rotates in reverse and the oil sucked from the first oil port (15) in FIG. 8 is used as the pressure oil from the second oil port (16). The rods of the open / close hydraulic cylinders (10) and (10) are supplied to the space, the gripper (4) is closed, and the pressure contact with the casing (1) is released.
[0024]
【The invention's effect】
According to the hydraulic source supply device for the gripper in the intermediate digging device of the present invention, the gripper is opened and closed by rotating the hydraulic pump using the drive of the winch device that supports the intermediate digging device. The weight of the device can be reduced as compared with the gripper device. In addition, according to the present invention, since the winch device is supported by the upper end of the casing, it is not necessary to suspend the intermediate digging device with a crane when digging, eliminating the disadvantage that the conventional wire rope management becomes complicated. In addition, since the gripper opening / closing drive is performed by the winch drive of the winch device regardless of the grounding of the excavator, there is no difficulty when the grounding surface is inclined as in the prior art.
[Brief description of the drawings]
FIG. 1 is a partially longitudinal front view of a casing in which a digging apparatus is mounted, with a portion omitted.
FIG. 2 is an enlarged cross-sectional view of the II-II line in FIG.
3 is a cross-sectional view taken along line III-III in FIG.
4 is a cross-sectional view taken along line IV-IV in FIG.
5 is a cross-sectional view taken along line VV in FIG.
6 is a cross-sectional view taken along line VI-VI in FIG.
FIGS. 7A, 7B, 7C, and 7D are schematic diagrams showing winch driving of the hydraulic power supply device.
FIG. 8 is a hydraulic circuit diagram.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Casing 2 Holder 3 Screw drilling head 4 Gripper 5 Hydraulic pump 6 Winch device 7 Hanging drum 10 Gripper opening / closing drive hydraulic cylinder 32 Wire rope B Medium digging device

Claims (1)

ウインチ装置のロープにより昇降自在に吊支されてケーシング内に挿入されたホルダーに、中掘り用掘削機と、油圧シリンダにより開閉されて上記ケーシング内面に接離駆動されるグリッパーとを備えた回転圧入ケーシングの中掘り装置において、
上記ホルダーに、吊りドラムおよび上記グリッパー接離駆動用油圧シリンダに油圧を給排すべき油圧ポンプを設置すると共に、上記油圧ポンプを上記吊りドラムに該吊りドラムから回転伝達可能に連継し、
上記ウインチ装置を上記ケーシングの上端部に着脱自在に支持させると共に、そのロープを上記吊りドラムに掛け回し、該ウインチ駆動により上記吊りドラムを無回転で昇降および左右回転可能にした、
中掘り装置におけるグリッパー用油圧源供給装置。
Rotating press-fitting provided with an excavator for digging and a gripper that is opened and closed by a hydraulic cylinder and driven to contact with and separate from the inner surface of the casing in a holder that is suspended and supported by a rope of a winch device and inserted into the casing. In the casing digging device,
The holder is provided with a hydraulic pump that should supply and discharge hydraulic pressure to and from the suspension drum and the gripper contact / separation drive hydraulic cylinder, and the hydraulic pump is connected to the suspension drum so that rotation can be transmitted from the suspension drum.
The winch device is detachably supported on the upper end of the casing, and the rope is hung around the suspension drum, and the suspension drum can be moved up and down and rotated left and right without rotation by driving the winch.
Hydraulic source supply device for grippers in medium digging equipment.
JP03983498A 1998-02-06 1998-02-06 Hydraulic source supply device for gripper in medium digging equipment Expired - Fee Related JP3903273B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP03983498A JP3903273B2 (en) 1998-02-06 1998-02-06 Hydraulic source supply device for gripper in medium digging equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP03983498A JP3903273B2 (en) 1998-02-06 1998-02-06 Hydraulic source supply device for gripper in medium digging equipment

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JP3903273B2 true JP3903273B2 (en) 2007-04-11

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Publication number Priority date Publication date Assignee Title
JP4714724B2 (en) * 2007-12-05 2011-06-29 三和機工株式会社 Hammer grab
CN106351221B (en) * 2016-09-23 2018-05-04 中淳高科桩业股份有限公司 A kind of multi-functional pile-grafting machine and its plant piling method

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