JPH03197720A - Working tool orientation control device for boom type working machine - Google Patents

Working tool orientation control device for boom type working machine

Info

Publication number
JPH03197720A
JPH03197720A JP33981589A JP33981589A JPH03197720A JP H03197720 A JPH03197720 A JP H03197720A JP 33981589 A JP33981589 A JP 33981589A JP 33981589 A JP33981589 A JP 33981589A JP H03197720 A JPH03197720 A JP H03197720A
Authority
JP
Japan
Prior art keywords
boom
control valve
working tool
packet
orientation
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
JP33981589A
Other languages
Japanese (ja)
Inventor
Kentaro Nakamura
健太郎 中村
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.)
Kubota Corp
Original Assignee
Kubota Corp
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 Kubota Corp filed Critical Kubota Corp
Priority to JP33981589A priority Critical patent/JPH03197720A/en
Publication of JPH03197720A publication Critical patent/JPH03197720A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To improve an operation feeling by a method wherein a working tool mounted to a boom is controlled by a manual operating device and an orientation control means, and a releasing means is provided to release the manual operating means and a working tool control means from interlocking therebetween during operation of the orientation control means. CONSTITUTION:A working tool 11 orientation of which is controlled is controlled by means of a working tool control valve 29 is mounted to the tip part of an elevatable boom 9. A manual operating means 48 to manually operate the working tool control valve 29 and an orientation control means 18 to operate the working tool control valve 29 so as to cause the working tool 11 to hold approximately given orientation during the rise of the boom 9 are provided to form a boom type working machine. A releasing means 49 to release the manual operating means 48 from the working tool control valve 29 during operation of the orientation control means 18 is provided. When the boom 9 is raised, the orientation control means 18 operates the working tool control valve 29 and the working tool 11 is controlled to given orientation, and the two means are released from interlocking therebetween by means of a release means 49.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、フロントローダ等のブーム型作業機における
作業具姿勢制御装置に関するものである。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a work tool attitude control device for a boom type work machine such as a front loader.

(従来の技術) トラクタ装着式のブーム型作業機、例えばフロントロー
ダにおいて、昇降自在に枢着されたブームの先端にパケ
ットをダンプ・スクイ動作可能に設け、ブームの上昇時
にパケットの開口部側が略水平姿勢を保つように、ブー
ムの上昇動作に連動してパケット制御弁を操作する姿勢
制御手段を設けたものがある。
(Prior Art) In a tractor-mounted boom-type working machine, such as a front loader, a packet is provided at the tip of a boom that is pivotably mounted to be able to rise and fall so that it can perform dump and rake operations, and when the boom is raised, the opening side of the packet is approximately Some machines are equipped with attitude control means that operates a packet control valve in conjunction with the upward movement of the boom to maintain a horizontal attitude.

これは、ブームの上昇時にパケットの開口部側か略水平
姿勢を保つため、ブームを高く上昇させた後、パケット
内の土砂をダンプトラック等に積込む作業を行なう場合
にも、その上昇途中にパケットの土砂が後方側にこぼれ
落ちることがなく、作業を安全に行える利点がある。
This is because when the boom is raised, the opening side of the packet is kept in a nearly horizontal position, so even when the boom is raised high and the earth and sand in the packet is loaded onto a dump truck, etc., it is necessary to This has the advantage that the work can be carried out safely without the dirt in the packet spilling out to the rear.

(発明が解決しようとする課題) しかし、従来のフロントローダでは、パケット制御弁を
手動操作する手動操作手段と姿勢制御手段とがパケット
制御弁に機械的に連結されているため、ブームの上昇時
に、手動操作手段の操作レバーが姿勢制御手段の作動に
よってオペレータの意志とは無関係に強制的に動くよう
になっている。
(Problem to be Solved by the Invention) However, in conventional front loaders, the manual operation means for manually operating the packet control valve and the attitude control means are mechanically connected to the packet control valve. The operating lever of the manual operating means is forcibly moved by the operation of the attitude control means, irrespective of the operator's will.

従って、オペレータが操作レバーにその動きに反する力
を無意識に加えれば、姿勢制御手段のリンク等に無理が
かかり、破損する惧れがある。また、操作レバーがオペ
レータの意志に関係なく動くため、操作怒覚が悪い。
Therefore, if the operator unconsciously applies a force to the control lever that is contrary to its movement, there is a risk that the links of the attitude control means will be strained and damaged. In addition, since the operating lever moves regardless of the operator's will, the user has poor operating sense.

本発明は、かかる点に鑑み、姿勢制御手段の作動時に、
手動操作手段と作業具制御弁との連動を解除し、手動操
作手段が動かないようにすることを目的とする。
In view of this point, the present invention provides, when the posture control means is activated,
The purpose is to release the interlock between the manual operating means and the work implement control valve so that the manual operating means does not move.

(課題を解決するための手段) 本発明は、昇降自在なブーム9の先端部に、作業具制御
弁29によって姿勢制御される作業具11を備えると共
に、作業具制御弁29を手動操作する手動操作手段48
と、ブーム9の上昇時に作業具11が略所定の姿勢を保
持するように作業具制御弁29を操作する姿勢制御手段
18とを備えたブーム型作業機の作業具姿勢制御装置に
おいて、姿勢制御手段18の作動時に手動操作手段48
を作業具制御弁29から解除する解除手段49を備えた
ものである。
(Means for Solving the Problems) The present invention includes a work implement 11 whose posture is controlled by a work implement control valve 29 at the tip of a boom 9 that can be raised and lowered, and a manual operation for manually operating the work implement control valve 29. Operating means 48
and a posture control means 18 for operating a work implement control valve 29 so that the work implement 11 maintains a substantially predetermined posture when the boom 9 is raised. Manual operating means 48 upon actuation of means 18
It is provided with a release means 49 for releasing the work implement control valve 29.

(作 用) ブーム9を上昇させると、姿勢制御手段18が作業具制
御弁29を操作し、作業具11を所定の姿勢に制御する
。この時、解除手段49が動き、手動操作手段4日と作
業具制御弁29との連動を解除するので、作業具制御弁
29が姿勢制御手段18により作動しても、手動操作手
段48がそれに連動して動くことはない。
(Function) When the boom 9 is raised, the attitude control means 18 operates the work implement control valve 29 to control the work implement 11 to a predetermined attitude. At this time, the release means 49 moves and releases the interlock between the manual operation means 4 and the work implement control valve 29, so even if the work implement control valve 29 is actuated by the attitude control means 18, the manual operation means 48 They do not move in tandem.

(実施例) 以下、本発明の一実施例を図面に基づいて詳述する。(Example) Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

第6図において、lはトラクタで、ボンネット2、ハン
ドル3、前輪4等を有する。5はブーム型作業機を例示
するフロントローダであって、トラクタ1に固定の取付
台6に立設されたマスト7、マスト7の上端にビン8で
昇降自在に枢着されたブーム9、ブーム9の先端にピン
10で枢着されたパケット(作業具01を備えている。
In FIG. 6, l is a tractor, and has a bonnet 2, a handlebar 3, a front wheel 4, etc. Reference numeral 5 denotes a front loader which is an example of a boom-type working machine, and includes a mast 7 erected on a mounting base 6 fixed to the tractor 1, a boom 9 pivotally attached to the upper end of the mast 7 with a bin 8 so that it can be raised and lowered, and a boom. The packet (equipped with a working tool 01) is pivotally attached to the tip of the packet 9 with a pin 10.

そして、マスト7とブーム9の中途部のブラケット12
との間にブームシリンダ13が、ブラケット12とパケ
ット11側のリンク機構14との間にパケットシリンダ
15が夫々介装されている。16は制御ボックスで、マ
スト7の上部に取付けられており、この制御ボックス1
6に操作レバー17が設けられている。18は姿勢制御
手段で、ブーム9の上昇時にパケット11の開口部19
が略水平姿勢を保つように、後述するパケット制御弁を
作動させるためのものである。
Then, the bracket 12 located halfway between the mast 7 and the boom 9
A boom cylinder 13 is interposed between the bracket 12 and the link mechanism 14 on the packet 11 side, and a packet cylinder 15 is interposed between the bracket 12 and the link mechanism 14 on the packet 11 side. 16 is a control box, which is attached to the top of the mast 7, and this control box 1
6 is provided with an operating lever 17. Reference numeral 18 denotes attitude control means, which controls the opening 19 of the packet 11 when the boom 9 is raised.
This is to operate a packet control valve, which will be described later, to maintain a substantially horizontal attitude.

姿勢制御手段18は、マスト7の上部にビン8により揺
動自在に枢着された第1リンク20、ブラケッH2にピ
ン21により揺動自在に枢着された第2及び第3リンク
22.23、第1リンク20と第2リンク22とを連結
する第10ツド24、第3リンク23とリンク機構14
とを連結する第20ツド25ミ第2リンク22に接離自
在に当接すべく第3リンク23に固定された突起26を
備え、第1リンク20に連動リンク27が連結されてい
る。
The attitude control means 18 includes a first link 20 pivotally connected to the upper part of the mast 7 by a pin 8, and second and third links 22, 23 pivotally connected to the bracket H2 by a pin 21. , a tenth link 24 that connects the first link 20 and the second link 22, a third link 23, and a link mechanism 14.
The second link 25 has a protrusion 26 fixed to the third link 23 so as to be able to move toward and away from the second link 22, and an interlocking link 27 is connected to the first link 20.

制御ボックス16内には、第1図乃至第5図に示すよう
に、下部側にブーム制御弁28、パケット制御弁(作業
具制御弁)29が設けられ、上部側に、これら各制御弁
28.29と操作レバー17とを連動させる機構が組込
まれている。即ち、制御ボックス16には、第3図乃至
第5図に示すように、平面視コ字形のブラケット30が
固定され、このブラケット30に、第1揺動子31に固
着された左右方向の第1軸32が枢支され、また第1揺
動子31のU字形状部内に略正立方体状の第2揺動子3
3が配置されて前後方向の第2軸34によって支持され
ている。なお、第1軸32と第2軸34とは直交状に配
置されている。
Inside the control box 16, as shown in FIGS. 1 to 5, a boom control valve 28 and a packet control valve (work implement control valve) 29 are provided on the lower side, and each of these control valves 28 is provided on the upper side. A mechanism for interlocking the .29 and the operating lever 17 is incorporated. That is, as shown in FIGS. 3 to 5, a bracket 30 having a U-shape in plan view is fixed to the control box 16, and to this bracket 30, a left-right oscillator fixed to the first rocker 31 is fixed. One shaft 32 is pivotally supported, and a second oscillator 3 having a substantially regular cubic shape is disposed within the U-shaped portion of the first oscillator 31.
3 is arranged and supported by a second shaft 34 in the front-rear direction. Note that the first axis 32 and the second axis 34 are arranged orthogonally.

第2揺動子33に操作レバー17の基部が固定されてお
り、この第2揺動子33には第2軸34と直交しかつ第
1軸32の軸心上に位置する軸部35が突設されている
。軸部35は継手36、プッシュプルケーブル37を介
してパケット制御弁29のスプール38に連結されてい
る。第1揺動子31は前方に突出したアーム部39を有
し、このアーム部39が継手40及びロッド41を介し
てブーム制御弁28のスプール42に連結されている。
The base of the operating lever 17 is fixed to the second oscillator 33, and the second oscillator 33 has a shaft portion 35 that is orthogonal to the second shaft 34 and located on the axis of the first shaft 32. It is installed protrudingly. The shaft portion 35 is connected to a spool 38 of the packet control valve 29 via a joint 36 and a push-pull cable 37. The first rocker 31 has an arm portion 39 projecting forward, and this arm portion 39 is connected to a spool 42 of the boom control valve 28 via a joint 40 and a rod 41.

プッシュプルケーブル37は、アウター43とこれに摺
動自在に挿入されたインナー44とから成り、アウター
43の両端は固定具45.46により固定されている。
The push-pull cable 37 consists of an outer 43 and an inner 44 slidably inserted into the outer 43, and both ends of the outer 43 are fixed by fixtures 45 and 46.

インナー44の一端は軸部35の継手36に連結され、
他端は第1図に示すように保合ビン47に連結されてい
る。そして、操作レバー17、第2揺動子33、プッシ
ュプルケーブル37、保合ビン47等により、パケット
制御弁29を手動操作するための手動操作手段48が構
成されている。
One end of the inner 44 is connected to the joint 36 of the shaft portion 35,
The other end is connected to a retaining bin 47 as shown in FIG. The operating lever 17, the second rocker 33, the push-pull cable 37, the locking bottle 47, and the like constitute a manual operating means 48 for manually operating the packet control valve 29.

手動操作手段48は、解除手段49を介してパケット制
御弁29に連結されている。即ち、解除手段49は、第
1図に示すように、ビン50により揺動自在に枢支され
た作動アーム51を有し、そのビン50は固定板52例
の支持板53に形成されたガイド孔54に係合ビン47
と共に摺動自在に嵌合されている。作動アーム51の一
端には保合ピン47に係脱自在な保合部55が形成され
、他端にはビン56、リンク57を介してパケット制御
弁29のスプール38が連結されている。ビン56は連
動リンク27の長孔58に挿入されており、ブーム9の
上昇時に、連動リンク27の長孔58の端部に係合して
作動アーム51を解除方向に回動させるようになってい
る。なお、ビン56と固定板52との間には、ビン56
を戻り方向に付するバネ59が掛装されている。なお、
固定板52は制制御ボックス16内に取付けられている
The manual operating means 48 is connected to the packet control valve 29 via a release means 49 . That is, as shown in FIG. 1, the release means 49 has an actuation arm 51 that is swingably supported by a pin 50, and the pin 50 is attached to a guide formed on a support plate 53 of a fixed plate 52. Engagement pin 47 in hole 54
They are slidably fitted together. A retaining portion 55 that can be freely engaged with and detached from the retaining pin 47 is formed at one end of the operating arm 51, and the spool 38 of the packet control valve 29 is connected to the other end via a bottle 56 and a link 57. The pin 56 is inserted into the elongated hole 58 of the interlocking link 27, and when the boom 9 is raised, it engages with the end of the elongated hole 58 of the interlocking link 27 to rotate the actuating arm 51 in the release direction. ing. Note that there is a bottle 56 between the bottle 56 and the fixed plate 52.
A spring 59 is attached thereto to force the movement in the return direction. In addition,
The fixed plate 52 is mounted inside the control box 16.

パケット11の底板60上には、第7図及び第8図に示
すように、側板61から内方に突出するガイド突起62
により前後摺動自在に案内される排土板63が設けられ
ている。
On the bottom plate 60 of the packet 11, as shown in FIGS. 7 and 8, there is a guide protrusion 62 that protrudes inward from the side plate 61.
An earth removal plate 63 is provided which is guided so as to be slidable back and forth.

次に動作を説明する。操作レバー17を第1軸32廻り
に前後に操作すると、第1揺動子31を介してブーム制
御弁28が上昇又は下降方向に切換わり、ブームシリン
ダ13が伸長又は収縮するので、ブーム9がビン8廻り
に上昇又は下降する。
Next, the operation will be explained. When the operating lever 17 is operated back and forth around the first shaft 32, the boom control valve 28 is switched in the upward or downward direction via the first rocker 31, and the boom cylinder 13 is extended or contracted, so that the boom 9 is It rises or falls around bottle 8.

また操作レバー17を第2軸34廻りに左右に操作する
と、第2揺動子33、プッシュプルケーブル37、作動
アーム51を介してパケット制御弁29がダンプ又はス
クイ方向に切換わり、パケット11がビン10廻りにダ
ンプ又はスクイ動作をする。この時には、第1図に示す
ように、保合ピン47が作動アーム51の係合部55に
係合しており、プッシュプルケーブル37のインナー4
4の動きが係合ビン47、係合部55を介して作動アー
ム51に伝えられ、スプール38が作動する。
Furthermore, when the operating lever 17 is operated left and right around the second shaft 34, the packet control valve 29 is switched to the dump or rake direction via the second oscillator 33, push-pull cable 37, and actuating arm 51, and the packet 11 is Make a dumping or scooping motion around the bin 10. At this time, as shown in FIG. 1, the retaining pin 47 is engaged with the engaging portion 55 of the operating arm 51, and the inner 4
4 is transmitted to the actuating arm 51 via the engaging pin 47 and the engaging portion 55, and the spool 38 is actuated.

バケツ)11に掬込んだ土砂を第9図の如くダンプトラ
ック64の荷台65に積込む場合には、開口部19が略
水平状態となるようにパケット11をスクイ方向(第6
図のa矢示方向)に回動させると共に、ブーム9を上昇
(b矢示)させて行く。この時、第3リンク23の突起
26が第2リンク22に当接又は近接するので、ブーム
9を上昇させて行くと、この突起26が第2リンク22
をC矢示方向に押し、ロッド24を介して第1リンク2
0をd矢示方向に回動させる。このため連動リンク27
がC矢示方向に引張られ、ビン56が長孔58の端部に
係合するので、第2図に示すように、リンク57を介し
てパケット制御弁29のスプール38がダンプ方向(f
矢示)に摺動する。従って、パケットシリンダ15が伸
長し、バケツ日1がダンプ方向(反a矢示)に僅かに回
動し、パケット11の開口部19を略水平に戻す。−方
、この時、作動アーム51がビン50廻りにg矢示方向
に揺動し、その係合部55が係合ビン47から外れるの
で、パケット制御弁29のスプール38が摺動しても操
作レバー17は動かない。
When loading earth and sand scooped into the bucket) 11 onto the loading platform 65 of the dump truck 64 as shown in FIG.
The boom 9 is rotated in the direction indicated by the arrow a in the figure), and the boom 9 is raised (in the direction indicated by the arrow b). At this time, the protrusion 26 of the third link 23 comes into contact with or approaches the second link 22, so when the boom 9 is raised, this protrusion 26 touches the second link 22.
in the direction of arrow C and connect the first link 2 via the rod 24.
0 in the direction of the d arrow. For this reason, interlocking link 27
is pulled in the direction of arrow C, and the bottle 56 engages with the end of the elongated hole 58, so that the spool 38 of the packet control valve 29 moves in the dump direction (f) via the link 57, as shown in FIG.
slide in the direction shown by the arrow. Therefore, the packet cylinder 15 is extended, the bucket 1 is slightly rotated in the dumping direction (arrow A), and the opening 19 of the packet 11 is returned to a substantially horizontal position. - On the other hand, at this time, the actuating arm 51 swings around the bottle 50 in the direction indicated by the g arrow, and its engagement portion 55 is disengaged from the engagement bottle 47, so even if the spool 38 of the packet control valve 29 slides. The operating lever 17 does not move.

バケ・ント11の開口部19が水平になれば、リンク機
構14、ロッド25を介して第3リンク23が反時計方
向(反C矢示)に回動し、突起26が第2リンク22か
ら外れるので、バネ59により作動アーム51等が戻さ
れ、係合部55に係合ビン47が係合し、以下同様の動
作を繰返してバケツ目1の開口部19を略水平状態に保
持する。
When the opening 19 of the bucket 11 becomes horizontal, the third link 23 rotates counterclockwise (counter-C arrow) via the link mechanism 14 and the rod 25, and the protrusion 26 moves from the second link 22. Since it comes off, the actuating arm 51 and the like are returned by the spring 59, the engagement pin 47 engages with the engagement portion 55, and the same operation is repeated to hold the opening 19 of the bucket eye 1 in a substantially horizontal state.

ブーム9、パケット11が第6図の点線位置まで上昇す
れば、次にパケットシリンダ15を伸長させ、パケット
11をピン10廻りにダンプ動作させて土砂をダンプト
ラック64の荷台65に積込む。この時、第9図に示す
如く排土板63が前下方に摺動して突出するので、この
排土板63によって土砂を案内することができる。従っ
て、土砂を荷台65の前の方へ積込むことができ、また
パケットll内を排土板63が摺動するので、パケット
11内の土の付着を防止できる。
When the boom 9 and the packet 11 rise to the dotted line position in FIG. 6, the packet cylinder 15 is then extended, the packet 11 is dumped around the pin 10, and earth and sand are loaded onto the platform 65 of the dump truck 64. At this time, as shown in FIG. 9, the earth removal plate 63 slides and protrudes forward and downward, so that the earth and sand can be guided by this earth removal plate 63. Therefore, earth and sand can be loaded toward the front of the loading platform 65, and since the earth discharge plate 63 slides inside the packet 11, it is possible to prevent soil from adhering to the inside of the packet 11.

なお、解除手段49は、実施例の構造に限定されるもの
ではない。また作業具はパケット9の他、フォーク等で
あっても良い。更に、第1図では、パケット制御弁29
、作動アーム51を上下方向に配置しているが、左右方
向に水平に配置しても良い。
Note that the release means 49 is not limited to the structure of the embodiment. In addition to the packet 9, the working tool may be a fork or the like. Further, in FIG. 1, the packet control valve 29
Although the operating arms 51 are arranged vertically, they may be arranged horizontally in the left-right direction.

(発明の効果) 本発明によれば、姿勢制御手段18の作動時に手動操作
手段48を作業具制御弁29から解除する解除手段49
を備えているので、ブーム9の上昇時に姿勢制御手段1
8により作業具制御弁29を作動させて作業具11を略
所定の姿勢に制御できるにも拘らず、それに連動して手
動操作手段48が動くことがない。
(Effects of the Invention) According to the present invention, the release means 49 releases the manual operation means 48 from the work implement control valve 29 when the posture control means 18 is activated.
When the boom 9 is raised, the attitude control means 1
Even though the work implement control valve 29 can be operated by 8 to control the work implement 11 to a substantially predetermined posture, the manual operation means 48 does not move in conjunction with this.

従って、各手段の構成部材に無理な力がかかることはな
く、また操作感覚も良好になる。
Therefore, no unreasonable force is applied to the constituent members of each means, and the operation feeling is also improved.

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

図面は本発明の一実施例を示し、第1図は解除手段部分
の側面図、第2図は同動作説明図、第3図は操作機構の
正面断面図、第4図は同側面断面図、第5図は同平面断
面図、第6図はフロントローダの側面図、第7図はパケ
ットの側面断面図、第8図は同正面断面図、第9図は動
作説明図である。 1・・・トラクタ、5・・・フロントローダ、9・・・
ブーム、11・・・パケット(作業具)、17・・・操
作レバー18・・・姿勢制御手段、29・・・パケット
制御弁(作業具制御弁)、48・・・手動操作手段、4
9・・・解除手段ゆ特 許 出 願 人 久保田鉄工株式会社
The drawings show one embodiment of the present invention, in which Fig. 1 is a side view of the release means, Fig. 2 is an explanatory view of the same operation, Fig. 3 is a front sectional view of the operating mechanism, and Fig. 4 is a side sectional view of the same. , FIG. 5 is a sectional view of the same plane, FIG. 6 is a side view of the front loader, FIG. 7 is a side sectional view of the packet, FIG. 8 is a front sectional view of the same, and FIG. 9 is an explanatory diagram of the operation. 1...Tractor, 5...Front loader, 9...
Boom, 11... Packet (work tool), 17... Operation lever 18... Attitude control means, 29... Packet control valve (work tool control valve), 48... Manual operation means, 4
9...Cancellation means Patent applicant Kubota Iron Works Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] (1)昇降自在なブーム(9)の先端部に、作業具制御
弁(29)によって姿勢制御される作業具(11)を備
えると共に、作業具制御弁(29)を手動操作する手動
操作手段(48)と、ブーム(9)の上昇時に作業具(
11)が略所定の姿勢を保持するように作業具制御弁(
29)を操作する姿勢制御手段(18)とを備えたブー
ム型作業機の作業具姿勢制御装置において、姿勢制御手
段(18)の作動時に手動操作手段(48)を作業具制
御弁(29)から解除する解除手段(49)を備えたこ
とを特徴とするブーム型作業機の作業具姿勢制御装置。
(1) A work implement (11) whose attitude is controlled by a work implement control valve (29) is provided at the tip of a boom (9) that can be raised and lowered, and a manual operation means for manually operating the work implement control valve (29). (48) and the work implement (when the boom (9) is raised).
11) so that the work implement control valve (
In the work implement attitude control device for a boom-type work machine, which is equipped with an attitude control means (18) for operating the work implement control valve (29), when the attitude control means (18) is activated, the manual operation means (48) is operated by the work implement control valve (29). A work tool attitude control device for a boom-type work machine, characterized in that it is provided with a release means (49) for releasing the work tool.
JP33981589A 1989-12-26 1989-12-26 Working tool orientation control device for boom type working machine Pending JPH03197720A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP33981589A JPH03197720A (en) 1989-12-26 1989-12-26 Working tool orientation control device for boom type working machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP33981589A JPH03197720A (en) 1989-12-26 1989-12-26 Working tool orientation control device for boom type working machine

Publications (1)

Publication Number Publication Date
JPH03197720A true JPH03197720A (en) 1991-08-29

Family

ID=18331082

Family Applications (1)

Application Number Title Priority Date Filing Date
JP33981589A Pending JPH03197720A (en) 1989-12-26 1989-12-26 Working tool orientation control device for boom type working machine

Country Status (1)

Country Link
JP (1) JPH03197720A (en)

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