JPH0227092A - Oil-hydraulic circuit for shield jack of shield excavating machine - Google Patents

Oil-hydraulic circuit for shield jack of shield excavating machine

Info

Publication number
JPH0227092A
JPH0227092A JP63175168A JP17516888A JPH0227092A JP H0227092 A JPH0227092 A JP H0227092A JP 63175168 A JP63175168 A JP 63175168A JP 17516888 A JP17516888 A JP 17516888A JP H0227092 A JPH0227092 A JP H0227092A
Authority
JP
Japan
Prior art keywords
shield
jack
oil
jacks
hydraulic circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP63175168A
Other languages
Japanese (ja)
Inventor
Kiyomi Sasaki
清美 佐々木
Michio Furui
道夫 古井
Yoichi Kitahara
陽一 北原
Yoshikazu Kido
義和 木戸
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Kumagai Gumi Co Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Kumagai Gumi Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd, Kumagai Gumi Co Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP63175168A priority Critical patent/JPH0227092A/en
Publication of JPH0227092A publication Critical patent/JPH0227092A/en
Pending legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/06Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
    • E21D9/093Control of the driving shield, e.g. of the hydraulic advancing cylinders

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)

Abstract

PURPOSE:To construct an oil-hydraulic circuit for shield jack small and light by furnishing a plurality of shield jacks propelling a propeller excavating machine, two or more oil-hydraulic pumps for propelling, and selector valves to change over jack by jack the oil-hydraulic circuit between the pump and jack. CONSTITUTION:At the time of meandering correction or curved excavation, selector valves 10 are changed over to put all shield jacks 1 in communication with propelling oil-hydraulic pumps 3a, 3b and each cut valve 5 for expansion is changed over to operate all shield jacks 1 in the direction of elongation. For meandering or curve proceeding shield jacks 1 on the inside and outside are operated in the direction of elongation. The lead and the rate of flow oil- hydraulic pumps for excavation 3a, 3b are controlled to vary the stroke of each jack 1, and the line pressure of an oil pressure circuit for jack is controlled by main relief valves 6a-6c to eliminate shortage in the thrust force of a propelling machine. This prevents meandering.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は2 シールド掘削機のシールドジヤツキ用油圧
回路に関するものである。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a hydraulic circuit for a shield jack of a shield excavator.

(従来の技術) 従来のシールド)粗削機のシールドジヤツキ用油圧回路
を第7図により説明すると、(1)がシールド掘削機を
推進する複数のシールドジヤツキ、(2)が電動モータ
、(3)が同電動モータ(2)により駆動される1つの
推進用油圧ポンプ、(4)が方向制御弁(5)が切換弁
、(6)が主リリーフ弁、(7)がリリーフ弁、(8)
が切換弁で、推進用油圧ポンプ(3)から吐出される圧
油を方向制御弁(4)−切換弁(5)−各シールドジヤ
ツキ(1)のヘッド側圧力室へ供給する一方、各シール
ドジヤツキ(1)のロッド側圧力室の作動油を方向制御
弁(4)−タンクへ排出して。
(Prior Art) The hydraulic circuit for the shield jack of a conventional shield) roughing machine is explained with reference to FIG. 7. (1) is a plurality of shield jacks that propel the shield excavator, (2) is an electric motor, (3) is one propulsion hydraulic pump driven by the electric motor (2), (4) is a directional control valve (5) is a switching valve, (6) is a main relief valve, (7) is a relief valve, (8)
is a switching valve, which supplies the pressure oil discharged from the propulsion hydraulic pump (3) to the direction control valve (4), switching valve (5), and the head side pressure chamber of each shield jack (1). Drain the hydraulic oil in the rod side pressure chamber of the shield jack (1) to the directional control valve (4) - tank.

各シールドジヤツキ(1)を伸長方向に作動させる。Each shield jack (1) is actuated in the extension direction.

また方向制御弁(4)及び切換弁(5)を切り換えて。Also, switch the directional control valve (4) and switching valve (5).

推進用油圧ポンプ(3)から吐出される圧油を方向制御
弁(4)−各シールドジヤツキ(1)のロッド側圧力室
へ供給する一方、各シールドジヤツキ(1)のヘッド側
圧力室の作動油を切換弁(5)一方向制御弁(4)−タ
ンクへ排出して、各シールドジヤツキ(1)を伸長方向
に作動させる。また方向制御弁(4)及び切換弁(5)
を中立位置に戻して、各シールドジヤツキ(1)を停止
させる。また主リリーフ弁(6)及びリリーフ弁(7)
によりシールドジヤツキ用油圧回路のライン圧を制御す
るようになっている。
Pressure oil discharged from the propulsion hydraulic pump (3) is supplied to the directional control valve (4) - the rod side pressure chamber of each shield jack (1), while the head side pressure chamber of each shield jack (1) is supplied to the rod side pressure chamber of each shield jack (1). The hydraulic oil is discharged into the switching valve (5), one-way control valve (4) - tank, and each shield jack (1) is operated in the extension direction. Also, the directional control valve (4) and the switching valve (5)
Return to the neutral position and stop each shield jack (1). Also, the main relief valve (6) and the relief valve (7)
This controls the line pressure of the hydraulic circuit for the shield jack.

(発明が解決しようとする課題) 前記第7図に示す従来のシールド掘削機のシールドジヤ
ツキ用油圧回路には9次の問題があった。
(Problems to be Solved by the Invention) The conventional shield jack hydraulic circuit of the shield excavator shown in FIG. 7 has the following nine problems.

即ち、(I)蛇行修正時や曲進掘削時には、各シールド
ジヤツキ(1)のうち、内側になるシールドジヤツキ(
1)を停止させる一方、外側になるシールドジヤツキ(
1)を伸長方向に作動させて、シールド掘削機を片押し
操作により操舵する必要があるが、推進用油圧ポンプ(
3)が1つなので、シールド掘削機の推力が不足する。
In other words, (I) when correcting meandering or excavating curves, the inner shield jack (1) of each shield jack (1) is
1) while stopping the shield jack (
1) in the extension direction and steer the shield excavator by pushing one side, but the propulsion hydraulic pump (
Since 3) is only one, the thrust of the shield excavator is insufficient.

また通常は、この片押し操作を前提に、各シールドジヤ
ツキ(1)に大型のものを使用しており、その分シール
ド掘削機が大型化する上に5重量が増大する。(II)
また掘削とセグメントの組立とを同時に行う同時施工型
シールド掘削機では、セグメント組込み位置のシールド
ジヤツキ(1)を縮み方向に作動させて無f1.荷にし
たまま、他のシールドジヤツキ(1)を伸長方向に作動
させて、掘削とセグメントの組立とを同時に行っている
が、この場合には、シールド掘削機の推力及びモーメン
トのバランスが崩れて、シールド掘削機が蛇行するとい
う問題があった。
In addition, normally, a large shield jack (1) is used for each shield jack (1) on the premise of this single-push operation, which increases the size and weight of the shield excavator. (II)
In addition, in a simultaneous construction type shield excavator that performs excavation and segment assembly at the same time, the shield jack (1) at the segment assembly position is operated in the contraction direction to eliminate f1. Excavation and segment assembly are performed simultaneously by operating the other shield jack (1) in the extension direction while the load remains in place, but in this case, the thrust and moment balance of the shield excavator is lost. There was a problem with the shield excavator meandering.

本発明は前記の問題点に鑑み提案するものであり、その
目的とする処は、蛇行修正時や曲進掘削時に生じていた
シールド掘削機の推力不足を解消できる。シールド掘削
機を小型化できる上に9重量を低減できる。さらに掘削
とセグメントの組立とを同時に行う同時施工型シールド
′掘削機に生じていた蛇行を防止できるシールド掘削機
のシールドジヤツキ用油圧回路を提供しようとする点に
ある。
The present invention has been proposed in view of the above-mentioned problems, and its purpose is to eliminate the lack of thrust of the shield excavator that occurs when correcting meandering or excavating in a curved direction. The shield excavator can be made smaller and its weight can be reduced. Another object of the present invention is to provide a hydraulic circuit for a shield jack of a shield excavator that can prevent the meandering that occurs in simultaneous construction type shield excavators that perform excavation and segment assembly simultaneously.

(課題を解決するための手段) 上記目的を達成するために1本発明のシールド掘削機の
シールドジヤツキ用油圧回路は、シールド掘削機を推進
する複数のシールドジヤツキと少なくとも2つの推進用
油圧ポンプと、同各推進用油圧ポンプと上記各シールド
ジヤツキとの間の油圧回路をシールドジヤツキ毎に切り
換える切換弁とを具えている。
(Means for Solving the Problems) In order to achieve the above object, the shield jack hydraulic circuit of the shield excavator of the present invention includes a plurality of shield jacks for propelling the shield excavator and at least two propulsion hydraulic pressure circuits. It includes a pump and a switching valve that switches the hydraulic circuit between each of the propulsion hydraulic pumps and each of the shield jacks for each shield jack.

また本発明のシールド掘削機のシールドジヤツキ用油圧
回路は、シールド掘削機を推進する複数のシールドジヤ
ツキと、少なくとも2つの推進用油圧ポンプと、同各推
進用油圧ポンプと上記各シールドジヤツキとの間の油圧
回路をシールドジヤツキ毎に切り換える切換弁と、セグ
メント組立時用補助油圧ポンプと、同セグメント組立時
用補助油圧ポンプと上記各シールドジヤツキとの間の油
圧回路をシールドジヤツキ毎に切り換える方向制御弁と
を具えている。
Further, the shield jack hydraulic circuit of the shield excavator of the present invention includes a plurality of shield jacks that propel the shield excavator, at least two propulsion hydraulic pumps, each of the propulsion hydraulic pumps, and each of the above-mentioned shield jacks. A switching valve that switches the hydraulic circuit between each shield jack, an auxiliary hydraulic pump for segment assembly, and a hydraulic circuit between the auxiliary hydraulic pump for segment assembly and each of the above shield jacks. It is equipped with a directional control valve that switches each time.

(作用) 本発明のシールド掘削機のシールドジヤツキ用油圧回路
は前記のように構成されており、蛇行修正時や曲進掘削
時には、各切換弁を切り換えて。
(Function) The hydraulic circuit for the shield jack of the shield excavator of the present invention is constructed as described above, and each switching valve is switched when correcting meandering or excavating in a curved direction.

全シールドジヤツキを少なくとも2つの掘進用油圧ポン
プに連通し、また各伸縮用切換弁を切り換え、全シール
ドジヤツキを伸長方向に作動させて即ち、蛇行や曲進に
対して内側になるシールドジヤツキも外側になるシール
ドジヤツキも伸長方向に作動させる一方、各掘進用油圧
ポンプの荷重或いは流量を制御して、上記各シールドジ
ヤツキのストロークを変えるので、蛇行修正時や曲進掘
削時に生していたシールド掘削機の推力不足を解消でき
る。また蛇行修正時や曲進掘削時に全シールドジヤツキ
を作動させる。
All the shield jacks are connected to at least two hydraulic pumps for excavation, and each expansion/contraction switching valve is switched to operate all the shield jacks in the extension direction, that is, to move the shield jack inward against meandering or turning. The shield jacks on the outside of the tunnel are also operated in the extension direction, and the load or flow rate of each hydraulic pump for excavation is controlled to change the stroke of each of the shield jacks. It can solve the lack of thrust of the shield excavator. In addition, all shield jacks are activated when correcting meandering or excavating curves.

また掘削とセグメントの組立とを同時に行う同時施工型
シールド掘削機では、一部のシールドジヤツキを無負荷
にし、残りの各シールドジヤツキを前記の要領で伸長方
向に作動させる一方、無負荷にしたシールドジヤツキの
方向制御弁を切り換え、同各シールドジヤツキをセグメ
ント組立時用油圧ポンプからの圧油により伸縮方向に作
動させて、セグメント組立等の作業を行う。
In addition, in a simultaneous construction type shield excavator that performs excavation and segment assembly at the same time, some shield jacks are left unloaded, and the remaining shield jacks are operated in the extension direction as described above, while the other shield jacks are left unloaded. The directional control valves of the shield jacks are switched, and each shield jack is operated in the expansion/contraction direction using pressure oil from the hydraulic pump for segment assembly, thereby performing work such as segment assembly.

(実施例) 次に本発明のシールド掘削機のシールドジヤツキ用油圧
回路を第1図乃至第5図に示す一実施例により説明する
と、第1.2図の(1)がシールド掘削機を推進する複
数のシールドジヤツキ、 (3a)(3b)が推進用油
圧ポンプ、 (3c)がセグメント組立時用補助油圧ポ
ンプ、(5)がシールドジャツギ(1)毎に設けた複数
の伸縮用切換弁、 (6a)が上記推進用油圧ポンプ(
3a)の主リリーフ弁、 (6b)が上記推進用油圧ポ
ンプ(3b)の主リリーフ弁、 (6c)が上記セグメ
ント組立時用補助油圧ポンプ(3c)の主リリーフ弁、
 (8a)が上記推進用油圧ポンプ(3a)の切換弁、
 (8b)が上記推進用油圧ポンプ(3b)の切換弁、
 (8c)が上記セグメント組立時用補助油圧ポンプ(
3c)の切換弁、(9)が各シールドジヤツキ(1)と
上記推進用油圧ポンプ(3a) (3b)との間の油圧
回路に設けた複数の方向制御弁、 (10)が各シール
ドジヤツキ(1)と上記推進用油圧ポンプ(3a) (
3b)との間の油圧回路に設けた複数の切換弁で5本実
施例の場合、第3.4Mに示すようにシールドジヤツキ
(1)が8本あり、同各シールドジヤツキ(1)が各切
換弁(10)を介して推進用油圧ポンプ(3a) (3
b)に並列に接続している。また同各シールドジャツギ
(1)が方向制御弁(9)を介してセグメント組立用補
助油圧ポンプ(3c)に並列に接続している。
(Example) Next, the hydraulic circuit for the shield jack of the shield excavator of the present invention will be explained using an example shown in FIGS. 1 to 5. (1) in FIG. Multiple shield jacks for propulsion, (3a) and (3b) are hydraulic pumps for propulsion, (3c) are auxiliary hydraulic pumps for segment assembly, and (5) are multiple telescopic jacks provided for each shield jack (1). The switching valve (6a) is connected to the propulsion hydraulic pump (
3a) is the main relief valve, (6b) is the main relief valve of the propulsion hydraulic pump (3b), (6c) is the main relief valve of the auxiliary hydraulic pump for segment assembly (3c),
(8a) is a switching valve of the propulsion hydraulic pump (3a);
(8b) is a switching valve of the propulsion hydraulic pump (3b);
(8c) is the auxiliary hydraulic pump for assembling the segment (
3c) switching valve, (9) a plurality of directional control valves provided in the hydraulic circuit between each shield jack (1) and the above-mentioned propulsion hydraulic pumps (3a) (3b), (10) each shield jack (1) and the above-mentioned propulsion hydraulic pump (3a) (
3b) In the case of the embodiment with five switching valves provided in the hydraulic circuit between is connected to the propulsion hydraulic pump (3a) (3) via each switching valve (10).
b) is connected in parallel. Further, each of the shield jacks (1) is connected in parallel to an auxiliary hydraulic pump for segment assembly (3c) via a directional control valve (9).

次に前記第1図乃至第5図に示すシールド掘削機のシー
ルドジヤツキ用油圧回路の作用を具体的に説明する。蛇
行修正時や曲進掘削時には、各切換弁(10)を切り換
えて、全シールドジヤツキ(1)を掘進用油圧ポンプ(
3a) (3b)に連通し、また各伸縮用切換弁(5)
を切り換え、全シールドジヤツキ(1)を伸長方向に作
動させて、即ち、蛇行や曲進に対して内側になるシール
ドジヤツキ(1)も外側になるシールドジヤツキ(1)
も伸長方向に作動させる一方、掘進用油圧ポンプ(3a
) (3b)の荷重或いは流量を制御し、上記各シール
ドジヤツキ(1)のストロークを変えて、蛇行修正時や
曲進掘削時に生じていたシールド掘削機の推力不足を解
消する。
Next, the operation of the hydraulic circuit for the shield jack of the shield excavator shown in FIGS. 1 to 5 will be explained in detail. When correcting meandering or excavating curves, switch each switching valve (10) and switch all shield jacks (1) to excavation hydraulic pump (
3a) (3b), and each expansion/contraction switching valve (5)
, all the shield jacks (1) are operated in the extension direction, that is, the shield jack (1) that is on the inside when meandering or turning is also changed to the shield jack (1) that is on the outside.
is also operated in the extension direction, while the excavation hydraulic pump (3a
) The load or flow rate of (3b) is controlled and the stroke of each of the shield jacks (1) is changed to eliminate the lack of thrust of the shield excavator that occurs when correcting meandering or excavating curves.

このとき、主リリーフ弁(6a) (6b) (6c)
によりシールドジヤツキ用油圧回路のライン圧を制御す
る。
At this time, main relief valves (6a) (6b) (6c)
controls the line pressure of the hydraulic circuit for the shield jack.

また非掘進時には、各方向制御弁(9)を切り換えて、
各シールドジヤツキ(1)をセグメント組立時用油圧ポ
ンプ(3c)からの圧油により伸縮方向に作動させる。
Also, when not digging, each directional control valve (9) is switched to
Each shield jack (1) is operated in the expansion/contraction direction by pressure oil from the hydraulic pump (3c) for segment assembly.

次に掘削とセグメントの組立とを同時に行う同時施工型
シールド掘削機に適用した場合の作用を具体的に説明す
る。この同時施工型シールド掘削機で掘削とセグメント
の組立とを同時に行う場合には、各シールドジヤツキ(
1)のうち、一部のシールドジヤツキ(1)を縮み方向
に作動させて、無負荷にする一方、残りのシールドジヤ
ツキ(1)に異なる推力を発生させる。例えば第4図の
・に示すようにNOIシールドジヤツキ(1)とNO2
シールドジヤツキ(1)とを縮み方向に作動して、無負
荷にする一方、残りのNO3シールドジヤツキ(1)〜
NO8シールドジヤツキ(1)を中立軸線N−Nを境に
、NO3シールドジヤツキ(1)及びN08シールドジ
ヤツキ(1)とNO4シールドジヤツキ(1)〜NO7
シールドジヤツキ(1)との2系統に分けて、各系統毎
に異なる推力を発生させる。
Next, the effect when applied to a simultaneous construction type shield excavator that performs excavation and segment assembly at the same time will be specifically explained. When excavating and assembling segments at the same time with this simultaneous construction type shield excavator, each shield jack (
Among the shield jacks (1), some of the shield jacks (1) are operated in the contraction direction to create no load, while the remaining shield jacks (1) generate a different thrust force. For example, as shown in Figure 4, NOI shield jack (1) and NO2
While operating the shield jack (1) in the contraction direction to make it unloaded, the remaining NO3 shield jacks (1) ~
NO8 shield jack (1) with neutral axis N-N as the border, NO3 shield jack (1), N08 shield jack (1) and NO4 shield jack (1) to NO7
It is divided into two systems with a shield jack (1), and each system generates a different thrust.

即ち、第5図に示すようにNO3シールドジヤツキ(1
)及びNO8シールドジヤツキ(1)にFlの推力を発
生させ、N04シールドジヤツキ(1)〜NO7シール
ドジヤツキ(1)にF2の推力を発生させる。またこの
とき、推進用油圧ポンプ(3a) (3b)で荷重或い
は流量を制御して、各シールドジヤツキ(1)のストロ
ークを変え、シールド掘削機の推力及びモーメントのバ
ランスを取って、@削とセグメントの組立とを同時に行
う同時施工型シールド掘削機に生じていた蛇行を防止す
る。また上記無負荷にしたNOIシールドジヤツキ(1
)及びNO2シールドジヤツキ(1)の方向制御弁(9
)を切り換え、同各シールドジヤツキ(1)をセグメン
ト組立時用油圧ポンプ(3c)からの圧油により伸縮方
向に作動させて2セグメント組立等の作業を行う。
That is, as shown in Fig. 5, NO3 shield jack (1
) and the NO8 shield jack (1) to generate a thrust of Fl, and the N04 shield jack (1) to NO7 shield jack (1) to generate a thrust of F2. At this time, the load or flow rate is controlled by the propulsion hydraulic pumps (3a) and (3b), and the stroke of each shield jack (1) is changed to balance the thrust and moment of the shield excavator. This prevents the meandering that occurs with simultaneous construction type shield excavators that perform segment assembly and construction at the same time. In addition, the NOI shield jack (1
) and NO2 shield jack (1) directional control valve (9
), each shield jack (1) is actuated in the expansion/contraction direction by pressure oil from the segment assembly hydraulic pump (3c) to perform work such as two-segment assembly.

第6図は、セグメント組立時用補助油圧ポンプ(3c)
の系統の油圧回路がない以外、前記第1図に示すシール
ド掘削機のシールドジヤツキ用油圧回路と同様に構成し
た他の実施例である。この実施例には、セグメント組立
時用補助油圧ポンプ(3c)がないので、無負荷のジヤ
ツキ操作を行うことができないが、推進用油圧ポンプ(
3a) (3b)によりモーメントバランスの調整が可
能である。
Figure 6 shows the auxiliary hydraulic pump (3c) for segment assembly.
This is another embodiment having the same structure as the hydraulic circuit for the shield jack of the shield excavator shown in FIG. 1, except that the hydraulic circuit of the system shown in FIG. In this embodiment, there is no auxiliary hydraulic pump (3c) for segment assembly, so no-load jacking operation cannot be performed, but the propulsion hydraulic pump (3c) is not available.
3a) The moment balance can be adjusted by (3b).

(発明の効果) 本発明のシールド掘削機のシールドジヤツキ用油圧回路
は前記のように蛇行修正時や曲進掘削時には、各切換弁
を切り換えて、全シールドジヤツキを少なくとも2つの
掘進用油圧ポンプに連通しまた各伸縮用切換弁を切り換
え、全シールドジヤツキを伸長方向に作動させて、即ち
、蛇行や曲進に対して内側になるシールドジヤツキも外
側になるシールドジヤツキも伸長方向に作動させる一方
各掘進用油圧ポンプの荷重或いは流量を制御して上記各
シールドジヤツキのストロークを変えるので、蛇行修正
時や曲進掘削時に生じていたシールド掘削機の推力不足
を解消できる。また蛇行修正時や曲進掘削時に全シール
ドジヤツキを作動させるので、シールドジヤツキに比較
的小型のものを使用できて、その分だけシールド掘削機
を小型化できる」−に1重量を低減できる。
(Effects of the Invention) As described above, the hydraulic circuit for the shield jack of the shield excavator of the present invention switches each switching valve when correcting meandering or excavating in a curved direction, so that all the shield jacks are connected to at least two excavation hydraulic pressures. It communicates with the pump and switches each expansion/contraction switching valve to operate all the shield jacks in the extension direction, that is, the shield jacks that are on the inside and the shield jacks that are on the outside when meandering or turning are moved in the extension direction. Since the stroke of each shield jack is changed by controlling the load or flow rate of each hydraulic pump for excavation, it is possible to eliminate the lack of thrust of the shield excavator that occurs when correcting meandering or excavating curves. In addition, since all shield jacks are activated when correcting meandering or excavating curves, a relatively small shield jack can be used, and the weight of the shield excavator can be reduced by that much. .

また掘削とセグメントの組立とを同時に行う同R施工型
シールド掘削機では、一部のシールドジヤツキを無負荷
にし、残りの各シールドジヤツキを前記の要領で伸長方
向に作動させる一方、無負荷にしたシールドジヤツキの
方向制御弁を切り換え、同各シールドジヤツキをセグメ
ント組立時用油圧ポンプからの圧油により伸縮方向に作
動させて、セグメンl−組立等の作業を行うので、掘削
とセグメントの組立とを同時に行う同時施工型シールド
掘削機に生していた蛇行を防止できる効果がある。
In addition, in the same R construction type shield excavator that excavates and assembles segments at the same time, some shield jacks are left unloaded, and the remaining shield jacks are operated in the extension direction as described above, while no load is applied. The directional control valves of the shield jacks are switched, and each shield jack is operated in the expansion and contraction direction using pressure oil from the hydraulic pump for segment assembly to perform work such as segment assembly. This has the effect of preventing the meandering that occurs with simultaneous construction type shield excavators that perform assembly and assembly at the same time.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明に係わるシールド掘削機のシールドジヤ
ツキ用油圧回路の一実施例を示す油圧回路図、第2図は
各シールドジャツギを示す側面図第3図は各シールドジ
ヤツキを示す正面図、第4Mは各シールドジヤツキの作
用説明図、第5図は推力を示す説明図、第6図は他の実
施例を示す油圧回路図、第7図は従来のシールド掘削機
のシールドジヤツキ用油圧回路図である。 (1)・・・シールドジヤツキ、 (3a) (3b)
  ・・・推進用油圧ポンプ、 (3c)  ・・・セ
グメント組立時用補助油圧ポンプ、(5)・・・伸縮用
切換弁、 (6a) (6b)(6c)  −−、主リ
リーフ弁、 (8a) (8b) (8c)  ”・油
圧ポンプ側の切換弁、(9)・・・方向切換弁。 (10)・・・切換弁。
Fig. 1 is a hydraulic circuit diagram showing an embodiment of the hydraulic circuit for a shield jack of a shield excavator according to the present invention, Fig. 2 is a side view showing each shield jack, and Fig. 3 is a side view showing each shield jack. Front view, 4M is an explanatory diagram of the action of each shield jack, Fig. 5 is an explanatory diagram showing the thrust, Fig. 6 is a hydraulic circuit diagram showing another embodiment, and Fig. 7 is a shield of a conventional shield excavator. It is a hydraulic circuit diagram for jacks. (1)...Shield jack, (3a) (3b)
... Hydraulic pump for propulsion, (3c) ... Auxiliary hydraulic pump for segment assembly, (5) ... Telescopic switching valve, (6a) (6b) (6c) --, Main relief valve, ( 8a) (8b) (8c) "・Switching valve on the hydraulic pump side, (9)...Direction switching valve. (10)...Switching valve.

Claims (1)

【特許請求の範囲】 1、シールド掘削機を推進する複数のシールドジャッキ
と、少なくとも2つの推進用油圧ポンプと、同各推進用
油圧ポンプと上記各シールドジャッキとの間の油圧回路
をシールドジャッキ毎に切り換える切換弁とを具えてい
ることを特徴としたシールド掘削機のシールドジャッキ
用油圧回路。 2、シールド掘削機を推進する複数のシールドジャッキ
と、少なくとも2つの推進用油圧ポンプと、同各推進用
油圧ポンプと上記各シールドジャッキとの間の油圧回路
をシールドジャッキ毎に切り換える切換弁と、セグメン
ト組立時用補助油圧ポンプと、同セグメント組立時用補
助油圧ポンプと上記各シールドジャッキとの間の油圧回
路をシールドジャッキ毎に切り換える方向制御弁とを具
えていることを特徴としたシールド掘削機のシールドジ
ャッキ用油圧回路。
[Claims] 1. A plurality of shield jacks that propel the shield excavator, at least two propulsion hydraulic pumps, and a hydraulic circuit between each of the propulsion hydraulic pumps and each of the shield jacks for each shield jack. A hydraulic circuit for a shield jack of a shield excavator, characterized by comprising a switching valve for switching to. 2. A plurality of shield jacks that propel the shield excavator, at least two propulsion hydraulic pumps, and a switching valve that switches the hydraulic circuit between each of the propulsion hydraulic pumps and each of the shield jacks for each shield jack; A shield excavator comprising: an auxiliary hydraulic pump for assembling a segment; and a directional control valve that switches a hydraulic circuit between the auxiliary hydraulic pump for assembling the segment and each of the shield jacks for each shield jack. Hydraulic circuit for shield jack.
JP63175168A 1988-07-15 1988-07-15 Oil-hydraulic circuit for shield jack of shield excavating machine Pending JPH0227092A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63175168A JPH0227092A (en) 1988-07-15 1988-07-15 Oil-hydraulic circuit for shield jack of shield excavating machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63175168A JPH0227092A (en) 1988-07-15 1988-07-15 Oil-hydraulic circuit for shield jack of shield excavating machine

Publications (1)

Publication Number Publication Date
JPH0227092A true JPH0227092A (en) 1990-01-29

Family

ID=15991454

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63175168A Pending JPH0227092A (en) 1988-07-15 1988-07-15 Oil-hydraulic circuit for shield jack of shield excavating machine

Country Status (1)

Country Link
JP (1) JPH0227092A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56105099A (en) * 1980-01-22 1981-08-21 Hitachi Construction Machinery Shielding excavator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56105099A (en) * 1980-01-22 1981-08-21 Hitachi Construction Machinery Shielding excavator

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