JPS6320760B2 - - Google Patents
Info
- Publication number
- JPS6320760B2 JPS6320760B2 JP53129787A JP12978778A JPS6320760B2 JP S6320760 B2 JPS6320760 B2 JP S6320760B2 JP 53129787 A JP53129787 A JP 53129787A JP 12978778 A JP12978778 A JP 12978778A JP S6320760 B2 JPS6320760 B2 JP S6320760B2
- Authority
- JP
- Japan
- Prior art keywords
- boom
- balance
- work platform
- cylinder
- sprocket
- 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
- 206010034719 Personality change Diseases 0.000 claims description 7
- 230000007935 neutral effect Effects 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000003028 elevating effect Effects 0.000 description 1
Landscapes
- Forklifts And Lifting Vehicles (AREA)
Description
【発明の詳細な説明】
本発明は高所作業車の作業台の底面を常に水平
位置に保持する作業台平衡保持装置に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a work platform balance maintaining device that maintains the bottom surface of a work platform of an aerial work vehicle in a horizontal position at all times.
従来、高所作業車の作業台平衡保持装置は平行
リンクあるいはチエーン、ワイヤー等のブーム姿
勢変化伝達手段を直接作業台に連結して作業台の
平衡保持を行なつていた。したがつてブームの基
端からブームの先端へ掛け渡される平行リンク、
ワイヤー及びチエーン等が破損すると作業台が転
覆して作業員が落下する危険があつた。 Conventionally, a work platform balance maintaining device for an aerial work vehicle maintains the balance of the work platform by directly connecting a boom posture change transmitting means such as a parallel link, a chain, or a wire to the work platform. Therefore, a parallel link spans from the base end of the boom to the tip of the boom,
If the wires, chains, etc. were damaged, there was a risk that the work platform would overturn and the workers would fall.
本発明はこのような事情にかんがみてなされた
ものであり、ブームの先端に枢支された作業台と
ブームの間に平衡保持シリンダを備え、油圧源と
平衡保持シリンダに連結され中立位置において平
衡保持シリンダを固定する平衡保持シリンダの制
御切換弁を作業台に設け、平行リンクあるいはス
プロケツトに掛け渡されたチエーン、シーブに掛
け渡されたワイヤー等によりブームの起伏角度の
変位をブームの基端からブームの先端の作業台枢
支軸部に伝達し、この変位によりロツドを介して
制御切換弁を切換えるブーム姿勢変化伝達手段を
設けて、ブームの姿勢変化にかかわらず作業台を
平衡保持することにより、ブーム姿勢変化伝達手
段が破損しても作業台が転覆する危険の無い高所
作業車の作業台平衡保持装置を提供することを目
的とするものである。 The present invention has been made in view of these circumstances, and includes a balance maintaining cylinder between the boom and a workbench that is pivotally supported at the tip of the boom, and is connected to a hydraulic power source and the balance maintaining cylinder to maintain balance at a neutral position. A control switching valve for the balance holding cylinder that fixes the holding cylinder is installed on the workbench, and the boom's heave angle can be controlled from the base end of the boom using a parallel link, a chain that spans the sprocket, a wire that spans the sheave, etc. By providing a boom attitude change transmission means that transmits the information to the work platform pivot shaft at the tip of the boom and switches the control switching valve via the rod based on this displacement, the work platform can be maintained in balance regardless of changes in the boom attitude. It is an object of the present invention to provide a work platform balance maintaining device for a high-altitude work vehicle that does not have the risk of overturning the work platform even if a boom attitude change transmission means is damaged.
以下図面により本発明の実施例について説明す
る。第１図は本発明が実施される屈伸式高所作業
車を示し、車体１に載置されたターンテーブル２
にロワーブーム３の一端が枢着９され、ロワーブ
ーム３の他端にはアツパーブーム４が枢支連結１
０されており、起伏シリンダ６の伸縮によりロワ
ーブーム３は起伏し、屈伸シリンダ７の伸縮によ
りアツパーブーム４は屈伸する。 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a bending-type aerial work vehicle in which the present invention is implemented, in which a turntable 2 is placed on a vehicle body 1.
One end of the lower boom 3 is pivotally connected 9 to the other end of the lower boom 3, and an upper boom 4 is pivotally connected to the other end of the lower boom 3.
0, the lower boom 3 is raised and lowered by the extension and contraction of the undulating cylinder 6, and the upper boom 4 is bent and extended by the extension and contraction of the bending cylinder 7.
アツパーブーム４の先端には作業員が搭乗する
作業台５が枢支１１され、アツパーブーム４と作
業台５の間には作業台５を平衡保持する平衝保持
シリンダ１２が両端枢支されて取付けられてい
る。 At the tip of the upper boom 4, a work platform 5 on which a worker rides is pivoted 11, and between the upper boom 4 and the work platform 5, a balance holding cylinder 12 for keeping the work platform 5 balanced is pivoted at both ends. ing.
第２図は本発明の説明図であり、ターンテーブ
ル２とロワーブーム３との枢着軸９に第１のスプ
ロケツト１３が固定され、枢着軸９は止金１９に
よつてターンテーブル２に固定されている。ロワ
ーブーム３とアツパーブーム４との枢支連結軸１
０には第２のスプロケツト１５と第３のスプロケ
ツト１６が平行に固着され、アツパーブーム４と
作業台５との枢支軸１１には第４のスプロケツト
１８が固着されており、第１のスプロケツト１３
と第２のスプロケツト１５の間、及び第３のスプ
ロケツト１６と第４のスプロケツト１８の間には
それぞれに環状チエーン１４，１７が掛け渡され
ている。 FIG. 2 is an explanatory diagram of the present invention, in which a first sprocket 13 is fixed to a pivot shaft 9 between the turntable 2 and the lower boom 3, and the pivot shaft 9 is fixed to the turntable 2 by a clasp 19. has been done. Pivot connection shaft 1 between lower boom 3 and upper boom 4
0, a second sprocket 15 and a third sprocket 16 are fixed in parallel, a fourth sprocket 18 is fixed to the pivot shaft 11 between the upper boom 4 and the workbench 5, and the first sprocket 13
Annular chains 14 and 17 are stretched between the sprocket and the second sprocket 15, and between the third sprocket 16 and the fourth sprocket 18, respectively.
枢支軸１１の第４のスプロケツト１８には棒状
のブラケツト２０が垂直方向に固着され、このブ
ラケツト２０は、ターンテーブル２に固定された
第１のスプロケツト１３と第２のスプロケツト１
５に掛け渡された環状チエーン１４及び第３のス
プロケツト１６と第４のスプロケツト１８に掛け
渡された環状チエーン１７により形成される２組
の平行四辺形の作用により、ロワーブーム３及び
アツパーブーム４の姿勢変化にかかわらず垂直方
向に保持される。ブラケツト２０はロツド２２に
よつて、作業台５に設けられた制御切換弁２１の
スプールに連結され、第１のスプロケツト１３、
第２のスプロケツト１５、第３のスプロケツト１
６、第４のスプロケツト１８、チエーン１４，１
７、ブラケツト２０及びロツド２２によりブーム
姿勢変化伝達手段を構成している。 A rod-shaped bracket 20 is vertically fixed to the fourth sprocket 18 of the pivot shaft 11, and this bracket 20 connects the first sprocket 13 and the second sprocket 1 fixed to the turntable 2.
The posture of the lower boom 3 and the upper boom 4 is controlled by the action of two sets of parallelograms formed by the annular chain 14 spanning the third sprocket 16 and the annular chain 17 spanning the third sprocket 16 and the fourth sprocket 18. Remains vertical regardless of changes. The bracket 20 is connected by a rod 22 to a spool of a control switching valve 21 provided on the workbench 5, and is connected to the first sprocket 13,
Second sprocket 15, third sprocket 1
6. Fourth sprocket 18, chain 14,1
7. The bracket 20 and the rod 22 constitute boom attitude change transmitting means.
制御切換弁２１は４ポート３位置で、第３図に
示す油圧回路を構成し、作業台５が平衡位置にあ
るとき制御切換弁２１は中立位置ｂに位置し、制
御切換弁２１のｃ位置あるいはａ位置への切換え
によつて平衡保持シリンダ１２は伸縮する。な
お、油圧源のポンプ２４は起伏シリンダ６、屈伸
シリンダ７等と共通でも別個でも良いが、共通に
する場合には分流器等によつて制御切換弁２１に
一定流量が確保されるようにする必要がある。 The control switching valve 21 has 4 ports and 3 positions, and constitutes the hydraulic circuit shown in FIG. Alternatively, the balance maintaining cylinder 12 expands and contracts by switching to the a position. The hydraulic power source pump 24 may be used in common with the elevating cylinder 6, bending cylinder 7, etc., or may be separate from each other, but if they are shared, a constant flow rate should be ensured to the control switching valve 21 using a flow divider or the like. There is a need.
次に作用を説明する。起伏シリンダ６あるいは
屈伸シリンダ７の伸縮によつてアツパーブーム４
と車体１との成す角度が変化すると作業台５は傾
斜しようとするが、ブラケツト２０は垂直に保持
されるので、アツパーブームが第２図のＤ方向に
移動すると、ロツド２２によつて制御切換弁２１
のスプールは引張られ、制御切換弁２１はｃ位置
に切換わり、平衡保持シリンダ１２は伸長して作
業台５を平衡位置へ戻す。作業台５が平衡位置に
戻ると制御切換弁２１も中立位置ｂに戻り、作業
台５の平衡を保持する。次に、アツパーブーム４
がＵ方向に移動すると、ロツド２２によつて制御
切換弁２１のスプールは押され、制御切換弁２１
はａ位置に切換わり、平衡保持シリンダ１２は縮
小して作業台５を平衡位置へ戻す。作業台５が平
衡位置に戻ると制御切換弁２１も中立位置ｂに戻
り、作業台５の平衡を保持する。 Next, the action will be explained. The upper boom 4 is moved by the expansion and contraction of the undulation cylinder 6 or the bending cylinder 7.
When the angle between the upper boom and the vehicle body 1 changes, the work platform 5 tends to tilt, but since the bracket 20 is held vertically, when the upper boom moves in the direction D in FIG. 21
The spool is tensioned, the control switching valve 21 is switched to position c, and the balancing cylinder 12 is extended to return the platform 5 to the balanced position. When the workbench 5 returns to the equilibrium position, the control switching valve 21 also returns to the neutral position b, maintaining the balance of the workbench 5. Next, Atsupahboom 4
moves in the U direction, the spool of the control switching valve 21 is pushed by the rod 22, and the control switching valve 21
switches to position a, and the balance cylinder 12 contracts to return the workbench 5 to the balance position. When the workbench 5 returns to the equilibrium position, the control switching valve 21 also returns to the neutral position b, maintaining the balance of the workbench 5.
なお、ブームの姿勢変化と同時に平衡保持シリ
ンダ１２の伸縮は行なわれるので、作業台５は常
に平衡保持されるのである。 Incidentally, since the balance maintaining cylinder 12 is expanded and contracted simultaneously with the change in the attitude of the boom, the work platform 5 is always maintained in equilibrium.
また、ブーム姿勢変化伝達手段のチエーン１
４，１７等が破損しても制御切換弁２１は中立位
置ｂに保持され、平衡保持シリンダ１２を固定す
るので、作業台５が転覆することは無い。 In addition, chain 1 of the boom attitude change transmission means
Even if 4, 17, etc. are damaged, the control switching valve 21 is maintained at the neutral position b and the balance maintaining cylinder 12 is fixed, so the work platform 5 will not overturn.
第４図は他の実施例を示し、ブーム姿勢変化伝
達手段として、スプロケツトとチエーンの代りに
平行リンク２９，３１，３０，３２を使用してブ
ラケツト２０を垂直に保持し、制御切換弁２１の
切換えによつて作業台５を平衡保持するものであ
る。 FIG. 4 shows another embodiment, in which parallel links 29, 31, 30, and 32 are used instead of sprockets and chains as boom attitude change transmitting means to hold the bracket 20 vertically, and the control switching valve 21 is By switching, the workbench 5 is maintained in equilibrium.
以上の様に、本発明はブーム姿勢変化伝達手段
によつて作業台に取付けた制御切換弁を切換えて
作業台の平衡保持シリンダを伸縮させるので、作
業台の平衡保持が確実になされ、またブーム姿勢
変化伝達手段が破損しても作業台が転覆しないの
で、高所作業車の安全性向上に有効である。 As described above, the present invention uses the boom attitude change transmission means to switch the control switching valve attached to the workbench to extend and retract the balance maintenance cylinder of the workbench, so that the balance of the workbench is reliably maintained and the boom Since the work platform will not overturn even if the posture change transmission means is damaged, this is effective in improving the safety of the aerial work vehicle.
各図は本発明の実施例を示し、第１図は屈伸式
高所作業車の側面図、第２図は説明図、第３図は
油圧回路図、第４図は他の実施例の説明図。
１……車体、２……ターンテーブル、３……ロ
ワーブーム、４……アツパーブーム、５……作業
台、６……起伏シリンダ、７……屈伸シリンダ、
１２……平衡保持シリンダ、１３，１５，１６，
１８……スプロケツト、１４，１７……チエー
ン、２０……ブラケツト、２１……制御切換弁、
２２……ロツド、２９，３０，３１，３２……平
行リンク。
Each figure shows an embodiment of the present invention, in which Figure 1 is a side view of a bendable aerial work vehicle, Figure 2 is an explanatory diagram, Figure 3 is a hydraulic circuit diagram, and Figure 4 is an explanation of another embodiment. figure. 1... Vehicle body, 2... Turntable, 3... Lower boom, 4... Upper boom, 5... Workbench, 6... Lifting cylinder, 7... Bending cylinder,
12... Balancing cylinder, 13, 15, 16,
18... Sprocket, 14, 17... Chain, 20... Bracket, 21... Control switching valve,
22... Rod, 29, 30, 31, 32... Parallel link.
Claims (1)
の作業台平衡保持装置において、該ブームと該作
業台間に平衡保持シリンダを備え、該作業台に油
圧源と該平衡保持シリンダに連結され中立位置に
おいて該平衡保持シリンダを固定する該平衡保持
シリンダの制御切換弁を設けるとともに、平行リ
ンクあるいはスプロケツトに掛け渡されたチエー
ン、シーブに掛け渡されたワイヤー等によりブー
ムの起伏角度の変位をブームの基端からブームの
先端の作業台枢支軸部に伝達し、該変位によりロ
ツドを介して該制御切換弁を切換えるブーム姿勢
変化伝達手段を設け、ブームの姿勢変化にかかわ
らず作業台を平衡保持することを特徴とする高所
作業車の作業台平衡保持装置。1. In a work platform balance maintenance device for an aerial work vehicle that has a work platform pivotally supported at the tip of a boom, a balance maintenance cylinder is provided between the boom and the work platform, and a hydraulic power source is connected to the balance maintenance cylinder on the work platform. In addition to providing a control switching valve for the balance-maintaining cylinder that fixes the balance-maintaining cylinder in the neutral position, the displacement of the boom's heave angle is controlled by a parallel link, a chain spanning the sprocket, a wire spanning the sheave, etc. A boom attitude change transmitting means is provided which transmits a signal from the base end of the boom to the work platform pivot shaft at the tip of the boom, and switches the control switching valve via the rod according to the displacement, so that the work platform can be changed regardless of the change in the boom attitude. A work platform balance maintaining device for an aerial work vehicle characterized by maintaining balance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12978778A JPS5557000A (en) | 1978-10-21 | 1978-10-21 | Working table balancing device for working vehicle working operating at high position |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12978778A JPS5557000A (en) | 1978-10-21 | 1978-10-21 | Working table balancing device for working vehicle working operating at high position |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5557000A JPS5557000A (en) | 1980-04-26 |
| JPS6320760B2 true JPS6320760B2 (en) | 1988-04-28 |
Family
ID=15018210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12978778A Granted JPS5557000A (en) | 1978-10-21 | 1978-10-21 | Working table balancing device for working vehicle working operating at high position |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5557000A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5232590U (en) * | 1975-08-26 | 1977-03-07 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5733040Y2 (en) * | 1975-10-28 | 1982-07-21 |
-
1978
- 1978-10-21 JP JP12978778A patent/JPS5557000A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5232590U (en) * | 1975-08-26 | 1977-03-07 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5557000A (en) | 1980-04-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6857821B2 (en) | Device for lifting a seagoing construction such as a drilling rig, provided with lifting members running mutually parallel | |
| JPS6221106B2 (en) | ||
| US3834488A (en) | Aerial platform with articulating jib | |
| JPS63127996A (en) | Cargo handling equipment capable of being folded | |
| US4449634A (en) | Hoisting assembly with a boom and a counterweight having adjustable respective positions | |
| JPS6320760B2 (en) | ||
| US3637043A (en) | Articulated aerial device | |
| US5135118A (en) | Jib hold rod securing device for cranes | |
| DE69327807T2 (en) | CRANE WITH JUMPER | |
| JP3052169B2 (en) | Article moving device | |
| JPH1072190A (en) | Parallel link | |
| JPS5935514Y2 (en) | aerial work vehicle | |
| DE29508758U1 (en) | Crane for aerial work platform with articulated boom | |
| FR2665429B1 (en) | AUTOMATED MOUNT CRANE, WITH LATERAL FOLDABLE BOOM. | |
| JP2508112Y2 (en) | Aerial work vehicle | |
| JP2508070Y2 (en) | Jib undulating device in boom with jib | |
| JPH0420877Y2 (en) | ||
| EP0245328A1 (en) | Lift platform. | |
| JPH0647289U (en) | Work platform of aerial work platform | |
| JPS5940760B2 (en) | Automatic balancing device for the work platform of an aerial work vehicle equipped with a refracting boom device | |
| CA1073373A (en) | High-reach work platform assembly | |
| JP2508118Y2 (en) | Boom structure | |
| JPH042960Y2 (en) | ||
| SU935442A1 (en) | Load-lifting crosspiece | |
| JPH0215914Y2 (en) |