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JP3857766B2 - Aerial work platform - Google Patents

Aerial work platform Download PDF

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Publication number
JP3857766B2
JP3857766B2 JP5983697A JP5983697A JP3857766B2 JP 3857766 B2 JP3857766 B2 JP 3857766B2 JP 5983697 A JP5983697 A JP 5983697A JP 5983697 A JP5983697 A JP 5983697A JP 3857766 B2 JP3857766 B2 JP 3857766B2
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Prior art keywords
boom
telescopic boom
telescopic
end side
section
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JPH10236792A (en
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川本　　博
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Tadano Ltd
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Tadano Ltd
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Description

【０００１】
【産業上の利用分野】
この発明は、走行体の位置するレベルよりも低い位置の作業を行うことができる高所作業車に関するものである。
【０００２】
【従来の技術】
従来のこの種の高所作業車は、図５に示す如く、走行体１、走行体１上に旋回自在に搭載した旋回台２、基端側のブームセクション３ａ，３ｂ内に順次先端側のブームセクション３ｂ，３ｃを伸縮自在に嵌挿してなり最基端側のブームセクション３ａの基端部を前記旋回台に起伏駆動自在に取り付けた第１伸縮ブーム３、基端側のブームセクション４ａ，４ｂ内に順次先端側のブームセクション４ｂ，４ｃを伸縮自在に嵌挿してなる第２伸縮ブーム４、前記第１伸縮ブーム３の最先端側のブームセクション３ｃの先端部と前記第２伸縮ブーム４の最基礎側のブームセクション４ａ先端部を連結する連結装置５、および、前記第２伸縮ブーム４の最先端側のブームセクション４ｃの先端部に揺動自在に取り付けた作業員搭乗用の作業台６とで構成されている。
【０００３】
前記連結装置５は、第１伸縮ブーム３の先端部に対して第２伸縮ブーム４の最基端側のブームセクション４ａを第１伸縮ブーム３の起伏軌跡面に沿って起伏自在に連結する起伏連結手段（支軸）５ａと、第１伸縮ブーム３の先端部と第２伸縮ブーム４の最基端側ブームセクション４ａの適所間に介装されて第２伸縮ブーム４を前記起伏連結手段（支軸）５ａ回りで起伏動させるための起伏用油圧シリンダ５ｂで構成されている。 この連結手段５は、第１伸縮ブーム３の起伏駆動に係わらず第２伸縮ブーム４の最基端側のブームセクション４ａが、略鉛直に起仰した起仰位置をとることができるようにするためのものである。
【０００４】
このように構成した従来の高所作業車は、作業現場において走行体１の走行移動、旋回台２の旋回駆動、第１伸縮ブーム３の起伏駆動および伸縮駆動、第２伸縮ブーム４の起伏駆動（第２伸縮ブーム４が鉛直姿勢を維持するよう起伏駆動）および伸縮駆動を併用して、作業台６を走行体１のレベルよりも低い任意の位置に移動させて、当該作業台６に搭乗した作業員が適宜の高所作業をするものである。
【０００５】
【発明が解決しようとする課題】
ところで上記した従来の高所作業車は、第２伸縮ブーム４と第１伸縮ブーム３を連結する連結装置５が、第２伸縮ブーム４を第１伸縮ブーム３の起伏軌跡面に沿う方向へのみ起伏駆動自在に構成しているため、走行体１が傾斜している場合には第２伸縮ブーム４を鉛直姿勢にすることができないという問題があった。
【０００６】
また、作業台６が取り付けられた第２ブーム４の先端部の位置が第１伸縮ブーム３の起伏軌跡面に沿う第２伸縮ブームの起伏軌跡面内に制約されるため、これら起伏軌跡面に直行する方向への第２伸縮ブーム４の先端部の移動は、旋回台２の旋回駆動に頼らざるを得ないものであった。このため、走行体１のレベルよりも低い位置にある大きな空間に、小さな差し込み口を経て第２伸縮ブーム４を差し込み、この第２伸縮ブーム４の先端部（下端部）に取り付けた作業台６に搭乗した作業員により高所作業をするような作業現場（例えば、走行体１を甲板上に位置させ第２伸縮ブーム４を狭いハッチから差し込んで船倉内で高所作業をする作業現場）においては、上記した小さな差し込み口の関係で旋回台２の旋回範囲が制限されるため、作業台６が取り付けられた第２伸縮ブーム４の先端部を、第１および第２伸縮ブームの起伏軌跡面に直行する方向へ移動させることができないという問題があった。
【０００７】
【課題を解決するための手段】
本発明の請求項１に係る高所作業車は、上記した従来の高所作業車の問題点を解決するため、第１伸縮ブーム３の先端部へ第２伸縮ブーム４の最基端側ブームセクション４ａの先端部を連結する連結装置５の構成を変更し、この連結装置５により、第２伸縮ブーム４の最基端側のブームセクション４ａが前記第１伸縮ブーム３の背面に沿って折り畳まれた倒伏位置と、略鉛直に起仰した起仰位置との間で起伏連結手段（支軸）９回りに前記第１伸縮ブーム３の起伏軌跡面に沿って起伏駆動自在で、且つ、前記第２伸縮ブーム４の最基端側のブームセクション４ａが、前記起伏連結手段（支軸）９及び第２伸縮ブーム４に直交する揺動連結手段（支軸）１０回りに揺動駆動自在なよう構成したものである。
【０００８】
このように構成した本発明の請求項１に係る高所作業車の作用を説明すると次の通りである。
即ち、請求項１に係る高所作業車は、走行体１が傾斜している場合であっても、第２伸縮ブーム４の最基端側のブームセクション４ａを、第１伸縮ブーム３の起伏軌跡面に沿う起伏駆動と、第１伸縮ブーム３の起伏軌跡面に直交する方向への揺動駆動を併用することで、第２伸縮ブームを鉛直姿勢にすることができるのである。また、第２伸縮ブーム４の揺動駆動により、旋回台２を旋回駆動させずとも、作業台６を第１伸縮ブーム３の起伏軌跡面と直交する方向へ移動できるので、旋回台２の旋回範囲が制限されるような作業現場（例えば、走行体１を甲板上に位置させ第２伸縮ブーム４を狭いハッチから差し込んで船倉内で高所作業をする作業現場）においても、作業台６が取り付けられた第２伸縮ブーム４の先端部を、第１伸縮ブームの起伏軌跡面に直行する方向へ移動させることができるのである。
【０００９】
また、上記の如く構成した本発明の請求項２に係る高所作業車は、上記請求項１に係る高所作業車と同様に作用する他、連結装置５における中間部材が第１伸縮ブーム３の基端側へ倒伏した状態では、前記中間部材が前記左右一対のブラケット間に収容されるようになっているので、、第２伸縮ブーム４の最基端側のブームセクション４ａを前記第１伸縮ブーム３の背面に沿って折り畳んだ倒伏位置において、第２伸縮ブーム４の最基端側のブームセクション４ａが第１伸縮ブーム３の背面に可能な限り近接させることができるのである。
【００１０】
【発明の実施の形態】
以下、本発明の高所作業車の実施例を図１〜図４に基づいて説明する。
図において、本発明の高所作業車は上記した従来の高所作業車と同様に、走行体１、走行体１上に旋回自在に搭載した旋回台２、基端側のブームセクション３ａ，３ｂ内に順次先端側のブームセクション３ｂ，３ｃを伸縮自在に嵌挿してなり最基端側のブームセクション３ａの基端部を前記旋回台に起伏駆動自在に取り付けた第１伸縮ブーム３、基端側のブームセクション４ａ，４ｂ内に順次先端側のブームセクション４ｂ，４ｃを伸縮自在に嵌挿してなる第２伸縮ブーム４、前記第１伸縮ブーム３の最先端側のブームセクション３ｃの先端部と前記第２伸縮ブーム４の最基礎側のブームセクション４ａ先端部を連結する連結装置５、および、前記第２伸縮ブーム４の最先端側のブームセクション４ｃの先端部に揺動自在に取り付けた作業員搭乗用の作業台６とで構成されている。
【００１１】
従来の高所作業車においては、前記連結装置５が、第２伸縮ブーム４の最基端側のブームセクション４ａが前記第１伸縮ブーム３の背面に沿って折り畳まれた倒伏位置と、略鉛直に起仰した起仰位置との間で前記第１伸縮ブーム３の起伏軌跡面に沿う起伏駆動のみが可能なように構成されているのであるが、本発明の高所作業車における前記連結装置は、第２伸縮ブーム４の最基端側のブームセクション４ａが前記第１伸縮ブーム３の背面に沿って折り畳まれた倒伏位置と、略鉛直に起仰した起仰位置との間で前記第１伸縮ブーム３の起伏軌跡面に沿って起伏駆動自在で、且つ、前記第２伸縮ブーム４の最基端側のブームセクション４ａが前記起伏軌跡面と直交する方向に揺動駆動自在なよう構成されている。
【００１２】
即ち、図１〜図４に示す如く連結装置５は、第１伸縮ブーム３の最先端側のブームセクション３ｃの先端部に当該ブームセクション３ｃの先端方向へ延出するようにして設けられた左右一対のブラケット７，７、中間部材８、中間部材８の基端部を前記左右一対のブラケット７，７間に位置させた状態で当該基端部を左右一対のブラケット７，７に起伏自在に連結する起伏連結手段（支軸）９、前記第２伸縮ブーム４の最基端側のブームセクション４ａの先端部と前記中間部材８の背面側とに介装され前記起伏連結手段（支軸）９の起伏軸心に直交する軸回りで揺動可能に連結する揺動連結手段（支軸）１０、第１伸縮ブーム３の最先端側のブームセクション３ｃの先端部と中間部材８の適所間に介装され中間部材８を前記起伏連結手段（支軸）９回りで起伏駆動させるための起伏用油圧シリンダ１１、および、前記第２伸縮ブーム４の最基端側のブームセクション４ａと中間部材８の適所間に介装され第２伸縮ブーム４の最基端側のブームセクション４ａを前記揺動連結手段（支軸）１０の揺動軸心回りで揺動駆動するための揺動用油圧シリンダ１２とでもって構成している。
【００１３】
このように構成した連結装置５は、前記中間部材を第１伸縮ブーム３の基端側へ倒伏した状態（図１および図２の状態）では、前記中間部材８が前記左右一対のブラケット間に収容されるので、第２伸縮ブーム４の最基端側のブームセクション４ａが前記第１伸縮ブーム３の背面に沿って折り畳まれた倒伏位置において第２伸縮ブーム４の最基端側のブームセクション４ａが第１伸縮ブーム３の背面に近接した位置をとることができるのである。
【００１４】
【発明の効果】
本発明に係る高所作業車は、走行体１が傾斜している場合であっても、第２伸縮ブーム４の最基端側のブームセクション４ａを、第１伸縮ブーム３の起伏軌跡面に沿う起伏駆動と、第１伸縮ブーム３の起伏軌跡面に直交する方向への揺動駆動を併用することで、第２伸縮ブームを鉛直姿勢にすることができるのである。また、第２伸縮ブーム４の揺動駆動により、旋回台２を旋回駆動させずとも、作業台６を第１伸縮ブーム３の起伏軌跡面と直交する方向へ移動できるので、旋回台２の旋回範囲が制限されるような作業現場（例えば、走行体１を甲板上に位置させ第２伸縮ブーム４を狭いハッチから差し込んで船倉内で高所作業をする作業現場）においても、作業台６が取り付けられた第２伸縮ブーム４の先端部を、第１伸縮ブームの起伏軌跡面に直行する方向へ移動させることができるのである。
【００１５】
また、連結装置５を請求項２の如く構成することにより、第２伸縮ブーム４の最基端側のブームセクション４ａを前記第１伸縮ブーム３の背面に沿って折り畳んだ倒伏位置において、第２伸縮ブーム４の最基端側のブームセクション４ａが第１伸縮ブーム３の背面に可能な限り近接させることができるのである。
【図面の簡単な説明】
【図１】本発明の高所作業車のブームの格納姿勢の側面図、
【図２】図１平面図、
【図３】本発明の高所作業車の作業状態の側面図、
【図４】図３のＸ−Ｘ矢視図、
【図５】従来の高所作業車の作業状態の説明図、
【符号の説明】
１；走行体、２；旋回台、
３；第１伸縮ブーム、３ａ，３ｂ，３ｃ；ブームセクション、
４；第２伸縮ブーム、４ａ，４ｂ，４ｃ；ブームセクション、
５；連結装置、
（５ａ；起伏連結手段…従来例、５ｂ；起伏用シリンダ…従来例）
６；作業台、７，７；ブラケット、８；中間部材、
９；起伏連結手段（支軸）、１０；揺動連結手段（支軸）、
１１；起伏用油圧シリンダ、１２；揺動用油圧シリンダ、
以上[0001]
[Industrial application fields]
The present invention relates to an aerial work vehicle capable of performing work at a position lower than a level at which a traveling body is located.
[0002]
[Prior art]
As shown in FIG. 5, a conventional aerial work vehicle of this type has a traveling body 1, a swivel base 2 that is pivotably mounted on the traveling body 1, and boom sections 3a and 3b on the proximal end side in turn. A first telescopic boom 3 in which boom sections 3b and 3c are telescopically inserted and a base end portion of a boom section 3a on the most proximal end side is attached to the swivel so as to be driven up and down, a boom section 4a on the base end side, The second telescopic boom 4 is formed by inserting the boom sections 4b, 4c on the distal end side into the telescopically retractable manner in 4b, the distal end portion of the boom section 3c on the most distal side of the first telescopic boom 3, and the second telescopic boom 4. And a connecting device 5 for connecting the tip of the boom section 4a on the most basic side , and a work table for boarding an operator swingably attached to the tip of the boom section 4c on the most distal side of the second telescopic boom 4 With 6 It is.
[0003]
The connecting device 5 undulates the boom section 4 a on the most proximal side of the second telescopic boom 4 with respect to the distal end portion of the first telescopic boom 3 so as to be able to undulate along the undulation trajectory surface of the first telescopic boom 3. The second telescopic boom 4 is connected between the distal end portion of the first telescopic boom 3 and the most proximal end boom section 4a of the second telescopic boom 4 to connect the second telescopic boom 4 to the undulating coupling means (the support shaft 5a). It comprises a hydraulic cylinder 5b for raising and lowering for raising and lowering around a spindle 5a. This connecting means 5 enables the boom section 4a on the most proximal end side of the second telescopic boom 4 to be in the upright position where the first telescopic boom 3 is lifted up substantially vertically, regardless of the up-and-down driving of the first telescopic boom 3. Is for.
[0004]
The conventional aerial work vehicle configured as described above is such that the traveling body 1 travels at the work site, the swivel 2 is swiveled, the first telescopic boom 3 is driven up and down, and the second telescopic boom 4 is driven up and down. (Working up and down so that the second telescopic boom 4 maintains a vertical posture) and telescopic driving are used together to move the work table 6 to an arbitrary position lower than the level of the traveling body 1 and board the work table 6 The worker who has done the appropriate height work.
[0005]
[Problems to be solved by the invention]
By the way, in the conventional aerial work vehicle described above, the connecting device 5 that connects the second telescopic boom 4 and the first telescopic boom 3 moves the second telescopic boom 4 in the direction along the undulation locus surface of the first telescopic boom 3 only. Since it is configured to be able to drive up and down, there is a problem that the second telescopic boom 4 cannot be in a vertical posture when the traveling body 1 is inclined.
[0006]
Moreover, since the position of the front-end | tip part of the 2nd boom 4 to which the work bench | platform 6 was attached is restrained in the undulation locus surface of the 2nd telescopic boom along the undulation locus surface of the 1st telescopic boom 3, these undulation locus surfaces The movement of the tip portion of the second telescopic boom 4 in the direction to go straight has to rely on the turning drive of the turntable 2. For this reason, the work table 6 attached to the distal end portion (lower end portion) of the second telescopic boom 4 is inserted into the large space at a position lower than the level of the traveling body 1 through the small insertion port. In a work site where a worker boarding the vehicle works at a high place (for example, a work site where the traveling body 1 is positioned on the deck and the second telescopic boom 4 is inserted from a narrow hatch to work at a high place in the hold). Since the swivel range of the swivel base 2 is limited due to the small insertion opening described above, the tip of the second telescopic boom 4 to which the work table 6 is attached is placed on the undulation locus surface of the first and second telescopic booms. There was a problem that it was not possible to move it in a direction that went straight on.
[0007]
[Means for Solving the Problems]
In order to solve the problems of the conventional aerial work vehicle described above, the aerial work vehicle according to the first aspect of the present invention is arranged such that the most proximal boom of the second telescopic boom 4 extends to the distal end of the first telescopic boom 3. The configuration of the connecting device 5 that connects the distal ends of the sections 4 a is changed, and the connecting device 5 causes the boom section 4 a on the most proximal end side of the second telescopic boom 4 to be folded along the back surface of the first telescopic boom 3. Between the tilted lying position and the rising position raised substantially vertically, and can be driven up and down around the hoisting trajectory surface of the first telescopic boom 3 around the hoisting connection means ( support shaft) 9 , and The boom section 4a on the most proximal end side of the second telescopic boom 4 can be driven to swing around the undulating connecting means (support shaft) 9 and the swing connecting means (support shaft) 10 orthogonal to the second telescopic boom 4. as are those that you configured.
[0008]
The operation of the aerial work vehicle according to claim 1 of the present invention configured as described above will be described as follows.
That is, in the aerial work vehicle according to the first aspect, even when the traveling body 1 is inclined, the boom section 4a on the most proximal side of the second telescopic boom 4 is moved up and down. By using the undulation drive along the trajectory plane and the swing drive in the direction orthogonal to the undulation trajectory plane of the first telescopic boom 3, the second telescopic boom can be brought into a vertical posture. In addition, the work table 6 can be moved in a direction orthogonal to the undulation trajectory plane of the first telescopic boom 3 without the swivel table 2 being swung by the swing drive of the second telescopic boom 4. Even in a work site where the range is limited (for example, a work site where the traveling body 1 is positioned on the deck and the second telescopic boom 4 is inserted from a narrow hatch to work at a high place in the hold), the work table 6 is The tip of the attached second telescopic boom 4 can be moved in a direction perpendicular to the undulation locus surface of the first telescopic boom.
[0009]
Further, the aerial work vehicle according to claim 2 of the present invention configured as described above operates in the same manner as the aerial work vehicle according to claim 1 above, and the intermediate member in the connecting device 5 is the first telescopic boom 3. Since the intermediate member is accommodated between the pair of left and right brackets in the state of being tilted to the proximal end side, the boom section 4a on the most proximal end side of the second telescopic boom 4 is moved to the first end. The boom section 4a on the most proximal end side of the second telescopic boom 4 can be brought as close as possible to the rear surface of the first telescopic boom 3 at the lying position folded along the rear surface of the telescopic boom 3.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of an aerial work vehicle according to the present invention will be described with reference to FIGS.
In the figure, the aerial work vehicle of the present invention is similar to the conventional aerial work vehicle described above, the traveling body 1, the swivel base 2 that is pivotably mounted on the traveling body 1, and the boom sections 3a, 3b on the base end side. A first telescopic boom 3 having a base end portion of a boom section 3a on the most proximal end side mounted on the swivel base so that the boom section 3b, 3c is telescopically inserted into the telescope. A second telescopic boom 4 in which the distal boom sections 4b and 4c are sequentially inserted into the telescopic boom sections 4a and 4b in a telescopic manner, and the distal end portion of the boom section 3c on the most distal side of the first telescopic boom 3; The connecting device 5 for connecting the tip part of the boom section 4a on the most basic side of the second telescopic boom 4 and the operation for swingably attaching to the tip part of the boom section 4c on the most distal side of the second telescopic boom 4 Member Passenger of is composed of a working platform 6.
[0011]
In the conventional aerial work vehicle, the connecting device 5 has a generally vertical position in which the boom section 4a on the most proximal end side of the second telescopic boom 4 is folded along the back surface of the first telescopic boom 3. It is configured so that only the hoisting drive along the hoisting locus surface of the first telescopic boom 3 can be performed between the hoisting position raised up and down, and the connecting device in the aerial work vehicle of the present invention. The boom section 4a on the most proximal end side of the second telescopic boom 4 is between the lying position where the boom section 4a is folded along the back surface of the first telescopic boom 3 and the rising position where the boom section 4a is lifted substantially vertically. 1. A configuration in which the boom section 4a on the most proximal end side of the second telescopic boom 4 can swing and drive in a direction perpendicular to the hoisting locus surface along the hoisting locus surface of the first telescopic boom 3. Has been.
[0012]
That is, as shown in FIGS. 1 to 4, the connecting device 5 is provided at the distal end of the boom section 3 c on the most distal side of the first telescopic boom 3 so as to extend in the distal direction of the boom section 3 c. A pair of brackets 7, 7, an intermediate member 8, and a base end portion of the intermediate member 8 positioned between the pair of left and right brackets 7, 7 can be raised and lowered to the pair of left and right brackets 7, 7. The undulating connection means (support shaft) 9 is interposed between the distal end portion of the boom section 4a on the most proximal end side of the second telescopic boom 4 and the back side of the intermediate member 8 to be connected. 9, a swing coupling means (support shaft) 10 that is pivotably coupled around an axis perpendicular to the undulation shaft center, and between the distal end of the boom section 3 c on the most distal side of the first telescopic boom 3 and the intermediate member 8. The intermediate member 8 interposed between the undulating connecting means (support ) The hoisting hydraulic cylinder 11 for hoisting around 9 and the boom section 4a on the most proximal end side of the second telescopic boom 4 and the intermediate member 8 are interposed between appropriate positions of the second telescopic boom 4. The boom section 4a on the base end side is configured with a swing hydraulic cylinder 12 for swinging around the swing axis of the swing connecting means (support shaft) 10.
[0013]
In the connecting device 5 configured as described above, the intermediate member 8 is interposed between the pair of left and right brackets in a state where the intermediate member is laid down to the proximal end side of the first telescopic boom 3 (the state shown in FIGS. 1 and 2). Since it is accommodated, the boom section 4a on the most proximal end side of the second telescopic boom 4 is folded along the back surface of the first telescopic boom 3, and the boom section on the most proximal end side of the second telescopic boom 4 is accommodated. 4a can take the position close to the back surface of the first telescopic boom 3.
[0014]
【The invention's effect】
In the aerial work vehicle according to the present invention, even when the traveling body 1 is inclined, the boom section 4a on the most proximal end side of the second telescopic boom 4 is placed on the hoisting locus surface of the first telescopic boom 3. The second telescopic boom can be brought into the vertical posture by using both the hoisting driving along and the swing driving in the direction orthogonal to the hoisting locus plane of the first telescopic boom 3. In addition, the work table 6 can be moved in a direction orthogonal to the undulation trajectory plane of the first telescopic boom 3 without the swivel table 2 being swung by the swing drive of the second telescopic boom 4. Even in a work site where the range is limited (for example, a work site where the traveling body 1 is positioned on the deck and the second telescopic boom 4 is inserted from a narrow hatch to work at a high place in the hold), the work table 6 is The tip of the attached second telescopic boom 4 can be moved in a direction perpendicular to the undulation locus surface of the first telescopic boom.
[0015]
Further, by configuring the connecting device 5 as in claim 2, the second section of the second telescopic boom 4 is folded down along the back surface of the first telescopic boom 3 in the second position. The boom section 4 a on the most proximal end side of the telescopic boom 4 can be as close as possible to the back surface of the first telescopic boom 3.
[Brief description of the drawings]
FIG. 1 is a side view of a retracted posture of a boom of an aerial work vehicle according to the present invention,
FIG. 2 is a plan view of FIG.
FIG. 3 is a side view of the working state of the aerial work vehicle of the present invention,
4 is a view taken along arrow XX in FIG.
FIG. 5 is an explanatory diagram of a working state of a conventional aerial work vehicle,
[Explanation of symbols]
1; traveling body, 2; swivel,
3; first telescopic boom, 3a, 3b, 3c; boom section,
4; second telescopic boom, 4a, 4b, 4c; boom section,
5; connecting device,
(5a: undulation connecting means: conventional example, 5b: undulation cylinder: conventional example)
6; work table, 7, 7; bracket, 8; intermediate member,
9; Uneven connection means (support shaft), 10; Oscillating connection means (support shaft),
11: Hydraulic cylinder for hoisting, 12: Hydraulic cylinder for rocking,
more than

Claims (2)

走行体１、走行体１上に旋回駆動自在に搭載した旋回台２、基端側のブームセクション３ａ，３ｂ内に順次先端側のブームセクション３ｂ，３ｃを伸縮自在に嵌挿してなりその基端部を前記旋回台２に起伏駆動自在に取り付けた第１伸縮ブーム３、基端側のブームセクション４ａ，４ｂ内に順次先端側のブームセクション４ｂ，４ｃを伸縮自在に嵌挿してなる第２伸縮ブーム４、前記第１伸縮ブーム３の先端部と前記第２伸縮ブーム４の最基端側のブームセクション４ａ先端部を連結する連結装置５、および、前記第２伸縮ブーム４の最先端側のブームセクション４ｃの先端部に揺動自在に取り付けた作業台６とからなり、
前記連結装置５が、前記第２伸縮ブーム４の最基端側のブームセクション４ａが前記第１伸縮ブーム３の背面に沿って折り畳まれた倒伏位置と、略鉛直に起仰した起仰位置との間で起伏連結手段（支軸）９回りに前記第１伸縮ブーム３の起伏軌跡面に沿って起伏駆動自在で、且つ、前記第２伸縮ブーム４の最基端側のブームセクション４ａが、前記起伏連結手段（支軸）９及び第２伸縮ブーム４に直交する揺動連結手段（支軸）１０回りに揺動駆動自在なよう構成されていることを特徴とする高所作業車。The base end of the traveling body 1, the swivel base 2 mounted on the traveling body 1 so as to be pivotable, and the boom sections 3b and 3c on the distal end side are sequentially inserted into the boom sections 3a and 3b on the base end side so as to be extendable and retractable. The first telescopic boom 3 whose part is attached to the swivel base 2 so as to be movable up and down, and the second telescopic boom section 4b and 4c are sequentially inserted into the telescopic boom section 4a and 4b in a telescopic manner. A boom 4, a connecting device 5 for connecting the distal end portion of the first telescopic boom 3 and the distal end portion of the boom section 4 a on the most proximal side of the second telescopic boom 4, and the distal end side of the second telescopic boom 4 A work table 6 swingably attached to the tip of the boom section 4c.
The connecting device 5 includes a lying position in which the boom section 4a on the most proximal end side of the second telescopic boom 4 is folded along the back surface of the first telescopic boom 3, and an ascending position that is lifted substantially vertically. freely undulating driven along the undulating locus surface of the undulating connecting means (pivot) 9 about the first telescopic boom 3 between, and, boom section 4a of the most proximal end side of the second telescopic boom 4, An aerial work vehicle characterized in that it can be driven to swing around a swinging connecting means (support shaft) 10 orthogonal to the undulating connecting means (support shaft) 9 and the second telescopic boom 4 . 連結装置５を、第１伸縮ブーム３の最先端側のブームセクション３ｃの先端部に当該ブームセクション３ｃの先端方向へ延出するようにして設けられた左右一対のブラケット７，７、中間部材８、中間部材８の基端部を前記左右一対のブラケット７，７間に位置させた状態で当該基端部を左右一対のブラケット７，７に起伏自在に連結する起伏連結手段（支軸）９、前記第２伸縮ブーム４の最基端側のブームセクション４ａの先端部と前記中間部材８の背面側とに介装され前記起伏連結手段（支軸）９の起伏軸心及び第２伸縮ブーム４に直交する軸回りで揺動可能に連結する揺動連結手段（支軸）１０、第１伸縮ブーム３の最先端側のブームセクション３ｃの先端部と中間部材８の適所間に介装され中間部材８を前記起伏連結手段（支軸）９回りで起伏駆動させるための起伏用油圧シリンダ１１、および、前記第２伸縮ブーム４の最基端側のブームセクション４ａと中間部材８の適所間に介装され第２伸縮ブーム４の最基端側のブームセクション４ａを前記揺動連結手段（支軸）１０の揺動軸心回りで揺動駆動するための揺動用油圧シリンダ１２とでもって構成し、これにより、前記中間部材を第１伸縮ブーム３の基端側へ倒伏した状態では、前記中間部材が前記左右一対のブラケット間に収容され、第２伸縮ブーム４の最基端側のブームセクション４ａが前記第１伸縮ブーム３の背面に沿って折り畳まれた前記倒伏位置において第２伸縮ブーム４の最基端側のブームセクション４ａが第１伸縮ブーム３の背面に近接した位置をとることができるよう構成したことを特徴とする請求項１の高所作業車。A pair of left and right brackets 7 and 7 and an intermediate member 8 are provided so that the connecting device 5 extends at the distal end portion of the boom section 3c on the most distal side of the first telescopic boom 3 in the distal direction of the boom section 3c. In the state where the base end portion of the intermediate member 8 is positioned between the pair of left and right brackets 7, 7, a undulation connecting means (support shaft) 9 that connects the base end portion to the pair of left and right brackets 7, 7 in a undulating manner. The hoisting shaft center of the hoisting connection means (support shaft) 9 and the second telescopic boom are interposed between the distal end portion of the boom section 4a on the most proximal end side of the second telescopic boom 4 and the back side of the intermediate member 8. 4, a swing connecting means (support shaft) 10 that is swingably connected around an axis orthogonal to 4, and is interposed between the distal end of the boom section 3 c on the most distal side of the first telescopic boom 3 and the intermediate member 8. The intermediate member 8 is connected to the undulation connecting means (support shaft) 9. The hydraulic cylinder 11 for raising and lowering to be driven up and down, and the most proximal end of the second telescopic boom 4 interposed between the boom section 4a on the most proximal end side of the second telescopic boom 4 and the intermediate member 8 The boom section 4a on the side is configured with a swing hydraulic cylinder 12 for swinging around the swing axis of the swing connecting means (support shaft) 10, whereby the intermediate member is expanded and contracted first. In a state where the boom 3 is tilted to the proximal end side, the intermediate member is accommodated between the pair of left and right brackets, and the boom section 4 a on the most proximal end side of the second telescopic boom 4 is located on the back surface of the first telescopic boom 3. The boom section 4a on the most proximal end side of the second telescopic boom 4 can be positioned close to the back surface of the first telescopic boom 3 in the lying position folded along. 1 of aerial work platforms.
JP5983697A 1997-02-26 1997-02-26 Aerial work platform Expired - Fee Related JP3857766B2 (en)

Priority Applications (1)

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JP5983697A JP3857766B2 (en) 1997-02-26 1997-02-26 Aerial work platform

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5983697A JP3857766B2 (en) 1997-02-26 1997-02-26 Aerial work platform

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JPH10236792A JPH10236792A (en) 1998-09-08
JP3857766B2 true JP3857766B2 (en) 2006-12-13

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