JPH0333760Y2 - - Google Patents
Info
- Publication number
- JPH0333760Y2 JPH0333760Y2 JP4801086U JP4801086U JPH0333760Y2 JP H0333760 Y2 JPH0333760 Y2 JP H0333760Y2 JP 4801086 U JP4801086 U JP 4801086U JP 4801086 U JP4801086 U JP 4801086U JP H0333760 Y2 JPH0333760 Y2 JP H0333760Y2
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- boom
- hydraulic tool
- operating valve
- valve
- 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.)
- Expired
Links
- 239000003921 oil Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
Landscapes
- Forklifts And Lifting Vehicles (AREA)
Description
【考案の詳細な説明】
(1) 産業上の利用分野
本考案は油圧工具等のアタツチメントを作業台
上で使用可能とした高所作業車の油圧回路に関す
るものである。[Detailed description of the invention] (1) Industrial application field The present invention relates to a hydraulic circuit for an aerial work vehicle that allows attachments such as hydraulic tools to be used on a workbench.
(2) 従来の技術
油圧工具を高所作業車の作業台上で使用するた
めに、作業台に操作弁を設けることは、例えば特
開昭60−204600号公報に記載されているように従
来より公知である。(2) Prior art In order to use hydraulic tools on the workbench of an aerial work vehicle, it is conventional to provide an operating valve on the workbench as described in, for example, Japanese Patent Application Laid-Open No. 60-204600. It is more well known.
(3) 考案が解決しようとする問題点
しかし、従来の油圧回路は、油圧工具の操作弁
とブーム等の操作弁がキヤリオーバ管路により連
結され、油圧工具からの戻り油を直接タンクへ戻
すものであつたため、作動圧の低い油圧工具を作
動させているときにはブーム等の操作弁に圧油が
供給されず、ブーム等を連動させることはできな
かつた。(3) Problems that the invention aims to solve However, in conventional hydraulic circuits, the operating valve of the hydraulic tool and the operating valve of the boom, etc. are connected by a carryover pipe, and the return oil from the hydraulic tool is returned directly to the tank. Therefore, when a hydraulic tool with a low operating pressure was operated, pressure oil was not supplied to the operation valve of the boom, etc., and the boom etc. could not be interlocked.
(4) 問題点を解決するための手段
本考案は、上記の問題点を解決するために、ブ
ームの先端に保持された作業台上で操作弁を操作
することにより油圧工具を使用可能とした高所作
業車の油圧回路において、ポンプとブーム等の操
作弁を連結する管路にセンターバイパス型の油圧
工具の操作弁を挿入し、油圧工具の操作弁と油圧
工具を連結する管路と、油圧工具の操作弁とブー
ム等の操作弁を連結する管路に連結される油圧工
具の戻り管路とを設けたものである。(4) Means for solving the problem In order to solve the above problem, the present invention makes it possible to use hydraulic tools by operating a control valve on the workbench held at the tip of the boom. In the hydraulic circuit of an aerial work vehicle, a center bypass type hydraulic tool operating valve is inserted into a pipeline connecting a pump and an operating valve such as a boom, and a pipeline connecting the hydraulic tool operating valve and the hydraulic tool; A return pipe for the hydraulic tool is provided which is connected to a pipe that connects the operating valve of the hydraulic tool and the operating valve of a boom or the like.
(5) 作用
上記の構成により、油圧工具の操作弁が中立位
置にあるときは、ポンプから吐出された圧油は油
圧工具の操作弁を通つてブーム等の操作弁に供給
され、ブーム等を作動させることができ、油圧工
具の操作弁が切換えられて油圧工具が使用されて
いるときも、油圧工具からの戻り油がブーム等の
操作弁に供給されるため、ブーム等の操作弁を切
換えることによりブーム等を連動させることがで
きる。(5) Effect With the above configuration, when the operating valve of the hydraulic tool is in the neutral position, the pressure oil discharged from the pump is supplied to the operating valve of the boom, etc. through the operating valve of the hydraulic tool, and the operating valve of the boom, etc. Even when the operating valve of the hydraulic tool is switched and the hydraulic tool is in use, the return oil from the hydraulic tool is supplied to the operating valve of the boom, etc., so the operating valve of the boom, etc. can be switched. This allows booms and the like to be linked.
(6) 実施例
以下、図面により本考案の実施例について説明
する。(6) Examples Examples of the present invention will be described below with reference to the drawings.
第２図に示すように、高所作業車はアウトリガ
２により支持された車体１上にターンテーブル３
が旋回可能に設けられ、このターンテーブル３に
伸縮ブーム４の基端が枢支され、伸縮ブーム４は
内蔵された伸縮シリンダ６により伸縮するととも
に、起伏シリンダ５により起伏する。伸縮ブーム
４の先端には作業台７及び吊り上げ装置１０が平
衡保持され、伸縮ブーム４の基部には下部操作弁
８が備えられ、作業台７には上部操作弁９が備え
られている。 As shown in FIG. 2, the aerial work vehicle has a turntable 3 mounted on a vehicle body 1 supported by outriggers 2.
The base end of a telescopic boom 4 is pivotally supported on the turntable 3, and the telescopic boom 4 is extended and contracted by a built-in telescopic cylinder 6, and raised and lowered by an undulation cylinder 5. A work platform 7 and a lifting device 10 are held in equilibrium at the tip of the telescopic boom 4, a lower operation valve 8 is provided at the base of the telescoping boom 4, and an upper operation valve 9 is provided at the work platform 7.
第１図に示すように、ポンプ１２の吐出管路１
３はアウトリガ操作弁２９及び下部操作弁８を介
して上部操作弁９に連結され、上部操作弁９は、
センターバイパス型の油圧工具の操作弁１５とブ
ーム等の操作弁である、旋回操作弁１６、起伏操
作弁１７、伸縮操作弁１８及びウインチ操作弁１
９が連結管路１４により連結され、連結管路１４
には管路２２が連結され、油圧工具の操作弁１５
のＡポートには管路２１が連結され、同Ｂポート
には管路２０が連結されており、管路２１と管路
２２は接続具２５，２６により油圧発電機等の油
圧工具２４に接続され、管路２０は油圧ブースタ
２３に連結されている。２８はタンク１１に連結
された戻り回路であり、管路２７は戻り回路２８
に連結されている。 As shown in FIG. 1, the discharge line 1 of the pump 12
3 is connected to an upper operation valve 9 via an outrigger operation valve 29 and a lower operation valve 8, and the upper operation valve 9 is
Operation valves 15 for center bypass type hydraulic tools, swing operation valves 16, luffing operation valves 17, telescopic operation valves 18, and winch operation valves 1, which are operation valves for booms, etc.
9 are connected by a connecting pipe 14, and the connecting pipe 14
A pipe line 22 is connected to the operating valve 15 of the hydraulic tool.
A conduit 21 is connected to the A port, and a conduit 20 is connected to the B port, and the conduit 21 and the conduit 22 are connected to a hydraulic tool 24 such as a hydraulic generator using connectors 25 and 26. The pipe line 20 is connected to a hydraulic booster 23. 28 is a return circuit connected to the tank 11, and the pipe line 27 is the return circuit 28.
is connected to.
上記の構成により、油圧工具の操作弁１５が操
作されず中立位置ｂにあるときは、ポンプ１２か
ら吐出され、アウトリガ操作弁２９及び下部操作
弁８を介して上部操作弁９に供給される圧油は、
油圧工具の操作弁１５及び管路１４を通つてブー
ム等の操作弁１６，１７，１８，１９に供給され
るため、ブーム等の操作弁を操作することによ
り、ブームあるいはウインチを作動させることが
できる。 With the above configuration, when the operating valve 15 of the hydraulic tool is not operated and is in the neutral position b, the pressure is discharged from the pump 12 and supplied to the upper operating valve 9 via the outrigger operating valve 29 and the lower operating valve 8. The oil is
Since it is supplied to the operating valves 16, 17, 18, 19 of the boom etc. through the operating valve 15 of the hydraulic tool and the pipe line 14, the boom or winch can be operated by operating the operating valve of the boom etc. can.
次に、油圧工具の操作弁１５を操作して位置ａ
に切換えると、ポンプ１２から吐出された圧油は
管路２１を通つて油圧工具２４に供給され、油圧
工具２４が作動する。そして、油圧工具２４を作
動させた圧油は管路２２により管路１４を通つて
ブーム等の操作弁１６，１７，１８，１９に供給
されるため、ブーム等の操作弁を操作することに
より、油圧工具２４と同時に、ブームあるいはウ
インチを作動させることができる。 Next, operate the operating valve 15 of the hydraulic tool to position a.
When the switch is switched to , the pressure oil discharged from the pump 12 is supplied to the hydraulic tool 24 through the pipe line 21, and the hydraulic tool 24 is operated. Then, the pressure oil that operated the hydraulic tool 24 is supplied to the operating valves 16, 17, 18, 19 of the boom etc. through the pipe line 22 and the operating valve of the boom etc. , the boom or winch can be activated simultaneously with the hydraulic tool 24.
また、油圧工具の操作弁１５を位置ｃに切換え
ると、ポンプ１２から吐出された圧油は管路２０
を通つて油圧ブースタ２３に供給され、油圧ブー
スタ２３が作動するが、この場合は、ブーム等の
操作１６，１７，１８，１９に圧油が供給されな
いため、ブーム等を連動させることはできない。 Furthermore, when the operating valve 15 of the hydraulic tool is switched to position c, the pressure oil discharged from the pump 12 is transferred to the pipe line 20.
The hydraulic oil is supplied to the hydraulic booster 23 through the hydraulic pressure booster 23, and the hydraulic booster 23 is operated. However, in this case, pressure oil is not supplied to the operations 16, 17, 18, and 19 of the boom, etc., so the boom etc. cannot be operated in conjunction.
なお、ブーム等とも連動が不要で、高い背圧を
かけられない油圧工具を使用するときは、油圧工
具の戻り側管路を管路２７に連結することによ
り、その油圧工具を使用することができる。 In addition, when using a hydraulic tool that does not require interlocking with a boom or the like and cannot apply high back pressure, the hydraulic tool can be used by connecting the return side pipe line of the hydraulic tool to the pipe line 27. can.
(7) 考案の効果
以上の様に、本考案によれば、簡単な構造によ
り、油圧工具を作動させないブーム等だけの作動
と、油圧工具とブーム等を連動させる作動を選択
的に行うことの可能な高所作業車の油圧回路が提
供されるため、本考案は高所作業車の操作性の向
上に有効である。(7) Effects of the invention As described above, according to the invention, with a simple structure, it is possible to selectively operate only the boom, etc. without operating the hydraulic tool, and operate the boom, etc., in conjunction with the hydraulic tool. The present invention is effective in improving the operability of the aerial work vehicle because it provides a hydraulic circuit for the aerial work vehicle.
図面は本考案の実施例を示し、第１図は一部省
略した油圧回路図、第２図は高所作業車の作業状
態を示す側面図である。
４……伸縮ブーム、７……作業台、１２……ポ
ンプ、１５……油圧工具の操作弁、１６，１７，
１８，１９……ブーム等の操作弁、２４……油圧
工具。
The drawings show an embodiment of the present invention, and FIG. 1 is a partially omitted hydraulic circuit diagram, and FIG. 2 is a side view showing the working state of the aerial work vehicle. 4... Telescopic boom, 7... Workbench, 12... Pump, 15... Hydraulic tool operating valve, 16, 17,
18, 19...Operation valve for boom etc., 24...Hydraulic tool.
Claims (1)
操作することにより油圧工具を使用可能とした高
所作業車の油圧回路において、ポンプとブーム等
の操作弁を連結する管路にセンターバイパス型の
油圧工具の操作弁を挿入し、油圧工具の操作弁と
油圧工具を連結する管路と、油圧工具の操作弁と
ブーム等の操作弁を連結する管路に連結される油
圧工具の戻り管路とを設けたことを特徴とする高
所作業車の油圧回路。 In the hydraulic circuit of an aerial work vehicle that enables the use of hydraulic tools by operating a control valve on the workbench held at the tip of the boom, a center bypass type is installed in the pipe connecting the pump and the control valve of the boom, etc. A hydraulic tool return pipe that is connected to a pipe that connects the hydraulic tool operating valve and the hydraulic tool, and a hydraulic tool return pipe that connects the hydraulic tool operating valve and the operating valve of the boom, etc. A hydraulic circuit for an aerial work vehicle, characterized in that a hydraulic circuit is provided with a road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4801086U JPH0333760Y2 (en) | 1986-03-31 | 1986-03-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4801086U JPH0333760Y2 (en) | 1986-03-31 | 1986-03-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62157899U JPS62157899U (en) | 1987-10-07 |
| JPH0333760Y2 true JPH0333760Y2 (en) | 1991-07-17 |
Family
ID=30869147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4801086U Expired JPH0333760Y2 (en) | 1986-03-31 | 1986-03-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0333760Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004043721A (en) * | 2002-07-15 | 2004-02-12 | Nichirin Co Ltd | Coating material composition |
-
1986
- 1986-03-31 JP JP4801086U patent/JPH0333760Y2/ja not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004043721A (en) * | 2002-07-15 | 2004-02-12 | Nichirin Co Ltd | Coating material composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62157899U (en) | 1987-10-07 |
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