JP5185568B2 - Suspension device for aerial work platforms - Google Patents

Description

本発明は，高所作業に用いられる高所作業車の懸吊装置，より詳しくは，車台上にシザースリンク又は，パンタグラフ状リンク機構からなる昇降手段を介して昇降するデッキを有する高所作業車の前記シザースリンク機構の伸張を規制し固定すると同時に，高所作業車をクレーンのフック等で懸吊することを可能とする装置に関する。   The present invention relates to a suspension system for an aerial work vehicle used for aerial work, and more specifically, an aerial work vehicle having a deck that moves up and down via a lifting / lowering means comprising a scissor link or a pantograph-like link mechanism on a chassis. The above-mentioned scissor link mechanism is restricted and fixed, and at the same time, an aerial work vehicle can be suspended by a crane hook or the like.

従来，例えば建築現場における天井施工，天井（天井裏を含む）及び壁面高所における照明取付工事あるいは塗装工事等のような高所作業では，足場を組立てて行っていたが，最近では作業の省力化と安全性を図るために，走行可能な車台上に昇降可能なデッキを設けてなる高所作業車が多用されている。   Conventionally, scaffolds have been assembled in high places such as ceiling construction at construction sites, lighting installation work or painting work on ceilings (including the back of the ceiling) and wall heights. In order to improve safety and safety, an aerial work platform with a deck that can be lifted and lowered on a travelable chassis is often used.

かような高所作業車を建築現場へ搬入，搬出する際には，一般にトラックに積込んで運搬し，トラックへの積込み，積降ろしは，自走式のものでも，通常はクレーン等で吊り上げて行っている。   When such an aerial work platform is brought into and out of a construction site, it is generally loaded on a truck and transported. The loading and unloading of the truck can be either self-propelled or usually lifted by a crane or the like. Is going.

特許文献１記載の手段は，車台上に複数段の左右一組のリンクからなる昇降機構を介して昇降可能に設けられたデッキを有する自走式高所作業車において，最上段のリンクの枢着軸の左右両端に支持部を延設し，これら支持部に基端部を回動自在かつ軸方向移動自在に支持され，先端部に係合孔を有する左右一対の固定金具を設け，一方，車台の左右両側に支持部の軸芯の垂下線上に配置され，固定金具の係合孔に係脱自在の固定ピンを設け，デッキが最下降位置で固定金具の係合孔を固定ピンに係合させて昇降機構の伸長を規制する固定具を構成し，他方，最上段のリンクの連結部材に，機体（高所作業車全体）重心の垂直線上で，かつデッキの下方位置に配置された懸吊具を固設し，該懸吊具の上方位置のデッキの床面の一部に開口部を形成し，該開口部に開閉自在の蓋体を設けたものである。   The means described in Patent Document 1 is a self-propelled aerial work vehicle having a deck that can be moved up and down via a lifting mechanism composed of a plurality of pairs of left and right links on a chassis. Supporting portions are provided at both the left and right ends of the receiving shaft, and a pair of left and right fixing brackets having a base end portion rotatably and axially supported by the supporting portions and having engagement holes at the distal end portions are provided. , It is arranged on the left and right sides of the chassis on the hanging line of the shaft core of the support part, and it is provided with a detachable fixing pin in the engaging hole of the fixing bracket, and the engaging hole of the fixing bracket is used as the fixing pin when the deck is at the lowest position. It constitutes a fixture that engages and regulates the extension of the lifting mechanism. On the other hand, it is placed on the connecting member of the uppermost link on the vertical line of the center of gravity of the fuselage (whole work platform) and below the deck. And attach an opening to a part of the floor of the deck above the suspension. Form, is provided with a lid openably to the opening portion.

又，一般的には，この種の高所作業車に，吊り金具を車台の角部４箇所に設け，作業車を吊り上げるときには，前記吊り金具にワイヤーロープを掛け渡しその中央部をクレーン等のフックに掛止して吊り上げている。
実用新案登録第２５３７２４７号公報 Also, in general, this type of high-altitude work vehicle is provided with suspension brackets at four corners of the chassis. It is hung on a hook.
Utility Model Registration No. 2537247

特許文献１記載の手段によれば，前記リンクと車台とを固定する固定金具の操作と，前記蓋体を開放して，懸吊具をセットするという作業を伴い，煩雑であり，又，懸吊具の操作にかまけてリンクの固定操作を失念したり，固定金具の脱落の可能性が否定できないこと，又，限られた大きさの前記蓋体下方に位置する前記懸吊具にクレーンのフックを係合するため，前記懸吊具が視認しづらく，作業が手間取るという問題があった。   According to the means described in Patent Document 1, the operation of the fixing bracket for fixing the link and the chassis and the work of opening the lid and setting the suspension are complicated, and the suspension is suspended. It is impossible to deny the possibility of the link fixing operation being forgotten by the operation of the lifting tool, the possibility of dropping of the fixing bracket, and the suspension tool located below the lid of a limited size. Since the hook is engaged, the suspension tool is difficult to visually recognize, and there is a problem that work is troublesome.

又，前記従来の懸吊手段では，吊り上げ作業の際にワイヤーロープ等を必要とし，これを４ヶ所の吊り金具に掛け渡してその略中央部をクレーン等のフックに掛止し，作業車が略水平状態になるように吊り上げなければならないため，作業が煩雑で手間がかかり，単独作業者の操作は困難であった。   In the conventional suspension means, a wire rope or the like is required for the lifting work, and the rope is hung on four hanging brackets, and its substantially central portion is hooked on a hook such as a crane. Since it had to be lifted so as to be in a substantially horizontal state, the work was complicated and time-consuming, and it was difficult for a single operator to operate.

さらに，ワイヤーロープを掛け渡すときに，作業車の塗装等の損傷を防止するために前記ワイヤーロープが作業車に当る個所（例えばデッキとデッキ上の手摺等）にウエス等を挟み込み，該部がへこむことや擦傷を防ぐようにしなければならず，より一層作業が煩雑になっていた。   Furthermore, when the wire rope is passed over, a cloth or the like is sandwiched between places where the wire rope hits the work vehicle (for example, a handrail on the deck and the deck) in order to prevent the work vehicle from being painted or the like. It was necessary to prevent dents and scratches, and the work became even more complicated.

又，機体１０を吊り上げたときに，ワイヤーロープのフックに対する掛止部がずれて作業車が傾き，作業車の姿勢が不安定になり搬出作業に危険を伴うこととなる。   Further, when the airframe 10 is lifted, the hooking portion of the wire rope with respect to the hook is displaced, the work vehicle is tilted, the work vehicle becomes unstable, and there is a danger in carrying out work.

本発明の目的は，車台，デッキとシザースリンク等から成る昇降機構を固定すると共に，懸吊手段と，前記固定手段ないしシザースリンク機構の伸張を規制する手段の構成及び動作を一体かつ，同期可能なものとして，簡単な作業で，高所作業車を懸吊することができる懸吊装置を提供することを目的とする。   An object of the present invention is to fix a lifting mechanism composed of a chassis, a deck and a scissor link, etc., and to be able to integrate and synchronize the structure and operation of a suspension means and a means for regulating the extension of the fixing means or the scissor link mechanism. In particular, it is an object of the present invention to provide a suspension device that can suspend an aerial work vehicle with simple work.

上記課題を解決するため，本発明懸吊装置は，車台とデッキとの間に複数のＸ字状リンクを配したシザースリンク機構を設け，該シザースリンク機構によって前記デッキを昇降させる高所作業車において，
前記デッキの下方位置に配置される左右のＸ字状リンク１６ｄ，１７ｄとの間の同一平面上に配置された支軸４０に懸吊具３０を回動自在に設け，
前記懸吊具３０の回動軌跡において，少なくとも前記懸吊具の掛止部を前記懸吊具３０の上方位置のデッキ床面に形成した開口部３２から前記床面１５ａ，１５ｂ上に突出可能とし，
前記掛止部が前記床面上に突出したとき，該位置への前記懸吊具３０の回動によって前記シザースリンク機構の伸張を規制する，伸張規制手段を設けたことを特徴とする。 In order to solve the above problems, the suspension device of the present invention is provided with a scissor link mechanism in which a plurality of X-shaped links are arranged between a chassis and a deck, and the deck is lifted and lowered by the scissor link mechanism. In
A suspension 30 is rotatably provided on a support shaft 40 disposed on the same plane between the left and right X-shaped links 16d and 17d disposed below the deck,
At the pivot trajectory of the suspension member 30, exits collision from the opening 32 forming the hook portion of at least the suspension member to the deck floor of the upper position of the suspension device 30 wherein the floor surface 15a, on 15b Made possible,
Can and the hook portion is protruded on the floor surface, for regulating the extension of the scissors linkage by the rotation of the suspension member 30 to the position, characterized in that a stretch restricting means.

又，前記支軸４０は，前記デッキの下方位置に配置される左右のＸ字状リンクを同一平面上で連結するいずれかの枢着軸２０ｂとすることができる。   Further, the support shaft 40 can be any pivot shaft 20b that connects the left and right X-shaped links arranged below the deck on the same plane.

また，前記伸張規制手段を前記デッキの最下降位置で作動させることができる。さらに，前記伸張規制手段は，前記懸吊具３０に係合部３４を形成すると共に，前記懸吊具を回動自在に設けた支軸４０の下方に位置する何れか１段の左右のＸ字状リンクを同一平面上で連結する枢着軸２０ａに固定具３５を設け，前記懸吊具の回動軌跡において，前記懸吊具の上方位置のデッキ床面に形成した開口部３２から前記床面上に少なくとも前記懸吊具の掛止部が突出したとき，前記係合部３４が前記固定具３５に係合し，前記シザースリンク機構の伸張を規制するよう構成することができる。 Further, the extension restricting means can be operated at the lowest lowered position of the deck. Further, the extension restricting means forms an engaging portion 34 in the suspension 30 and is provided at any one of the left and right X positions located below the support shaft 40 on which the suspension is rotatably provided. A fixing tool 35 is provided on the pivot shaft 20a that connects the character-shaped links on the same plane, and the opening 32 formed on the deck floor surface above the suspension is provided in the pivot locus of the suspension. When at least a latching portion of the suspension tool projects on the floor surface, the engagement portion 34 can be engaged with the fixing device 35 to restrict extension of the scissor link mechanism .

又，前記固定具を前記車台に設けることができる。   Moreover, the said fixing tool can be provided in the said chassis.

さらに，前記支軸４０は，前記Ｘ字状リンクの交点を連結する枢着軸（２０ａ，２０ｂ）に嵌装した軸管（２９ａ，２９ｂ，２９１ｂ，２９２ｂ）であって，前記固定具３５は，前記懸吊具３０を回動自在に設けた支軸の下方に位置する前記Ｘ字状リンクの交点を連結する枢着軸に嵌装した軸管を介して前記枢着軸に設けることができる。Further, the support shaft 40 is a shaft tube (29a, 29b, 291b, 292b) fitted to a pivot shaft (20a, 20b) connecting the intersections of the X-shaped links, and the fixture 35 is The suspension 30 may be provided on the pivot shaft via a shaft tube fitted to a pivot shaft that connects the intersections of the X-shaped links positioned below the pivot shaft provided rotatably. it can.

さらに，前記シザースリンク機構が，油圧シリンダの伸縮動作によって作動し，前記デッキを昇降する構成において，Further, in the configuration in which the scissor link mechanism is operated by an expansion / contraction operation of a hydraulic cylinder to raise and lower the deck,
前記懸吊具の回動軌跡において，前記懸吊具の上方位置のデッキ床面に形成した開口部から前記床面上に少なくとも前記懸吊具の掛止部を突出したことを検出する掛止部位置検出手段５０と，前記油圧シリンダ１９への作動油を流通又は遮断する作動油遮断手段６０とを設け，  A latch for detecting that at least a latching portion of the suspension tool is projected on the floor surface from an opening formed in a deck floor surface above the suspension tool in a rotation trajectory of the suspension tool. Part position detecting means 50 and hydraulic oil blocking means 60 for circulating or blocking hydraulic oil to the hydraulic cylinder 19 are provided.
前記懸吊具３０の回動軌跡において，前記懸吊具の上方位置のデッキ床面に形成した開口部３２から前記床面上に少なくとも前記懸吊具の掛止部３１を突出したことを検出する掛止部位置検出手段５０の検出信号で，前記油圧シリンダ１９への作動油を遮断するよう前記作動油遮断手段を作動させ，前記シザースリンク機構の伸張を規制することができる。  It is detected that at least the latching portion 31 of the suspension has protruded from the opening 32 formed on the deck floor above the suspension in the rotation trajectory of the suspension 30 on the floor. In response to the detection signal from the latching portion position detecting means 50, the hydraulic oil shut-off means is operated so as to shut off the hydraulic oil to the hydraulic cylinder 19, and the extension of the scissor link mechanism can be restricted.

なお，本発明に包含される実施形態として，前記デッキの下方位置に配置される最上段の左右のＸ字状リンク１６ｄ，１７ｄを同一平面上で連結する，例えば，左右のＸ字状リンクの交点を連結する支軸を成す枢着軸２０ｂに懸吊具３０を回動自在に設け，該懸吊具３０は，一端例えば，上端に掛止部３１と，他端，例えば下端に係合部３４を形成し，かつ，前記懸吊具３０の垂直位置において，前記掛止部３１は，前記懸吊具３０の上方位置のデッキ床面１５ａ，１５ｂに形成した開口部３２から前記デッキ床面１５ａ，１５ｂ上に突出する回動軌跡を有し，前記係合部３４は，前記懸吊具の垂直位置及び前記デッキを下降した状態，例えば最下降位置において，前記最上段より下方に位置する何れか１段，例えば，最下段の左右のＸ字状リンク１６ａ，１７ａを同一平面上で連結する，例えば，左右のＸ字状リンクの交点を連結する支軸を成す枢着軸２０ａに嵌装する軸管２９に形成した固定具３５に係合自在の回動軌跡を有し，これら前記懸吊具等から成るシザースリンク機構の伸張を規制する伸張規制手段を特徴とする高所作業車の懸吊装置が挙げられる。   As an embodiment included in the present invention, the left and right X-shaped links 16d, 17d arranged at the lower position of the deck are connected on the same plane, for example, left and right X-shaped links. A suspension 30 is rotatably provided on a pivot shaft 20b that forms a support shaft that connects the intersections. The suspension 30 is engaged with a hook 31 at one end, for example, an upper end, and the other end, for example, a lower end. In the vertical position of the suspension 30, the latching portion 31 is connected to the deck floor from openings 32 formed in the deck floor surfaces 15 a and 15 b above the suspension 30. The engaging portion 34 is positioned below the uppermost stage in the vertical position of the suspension and in the state where the deck is lowered, for example, in the lowest lowered position. Any one stage, for example, the left and right X-shaped at the bottom The links 16a and 17a are connected on the same plane, for example, freely engageable with a fixture 35 formed on a shaft tube 29 fitted to a pivot shaft 20a that forms a support shaft that connects the intersections of left and right X-shaped links. There is a suspension device for an aerial work vehicle characterized by an extension restricting means for restricting the extension of the scissor link mechanism composed of these suspension tools and the like.

本発明によれば，車台，デッキとシザースリンク等から成る昇降機構を固定すると共に，懸吊手段と，固定手段ないしシザースリンク機構の伸張を規制する手段の構成及び動作を一体かつ，同期可能なものとして，簡単な操作による作業で，懸吊準備と，機体固定とを同時に行って，高所作業車を安定して，安全に懸吊することができる。   According to the present invention, the lifting and lowering mechanism including the chassis, the deck and the scissor link is fixed, and the structure and operation of the suspension means and the means for restricting the extension of the fixing means or the scissor link mechanism can be integrated and synchronized. As a matter of fact, it is possible to suspend an aerial work vehicle stably and safely by performing a simple operation and performing suspension preparation and fixing the fuselage at the same time.

又，特許文献１においては，シザースリンクの固定金具をリンクの外側に設けていることから，高所作業車の懸吊時に固定金具を設備などに接触させて，固定金具が外れる危険性があるが，本発明においては，懸吊時に伸張規制手段を他に接触させる可能性がなく，より安全な懸吊作業を可能とした。   Further, in Patent Document 1, since the fixing bracket of the scissor link is provided on the outside of the link, there is a risk that the fixing bracket may come off when the fixing bracket is brought into contact with equipment or the like when the work vehicle is suspended at a high place. However, in the present invention, there is no possibility of bringing the extension regulating means into contact with another during suspension, and a safer suspension operation is possible.

以下，本発明の実施形態を添付図面を参照しながら詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

図１（Ａ）〜（Ｃ）及び図２（Ａ）〜（Ｃ）において，高所作業車の機体１０は，バッテリー等で自走可能なホイール式の走行機構１２を有する車台１３上にシザースリンクないし，パンタグラフ型リンク機構からなる昇降機構１４を介して昇降するデッキ１５を設けて構成されている。   1 (A) to 1 (C) and FIGS. 2 (A) to 2 (C), an aerial work vehicle body 10 is scissors on a chassis 13 having a wheel-type traveling mechanism 12 that can be self-propelled by a battery or the like. A deck 15 that moves up and down via a lifting and lowering mechanism 14 composed of a link or pantograph type link mechanism is provided.

又，前記デッキ１５上には防護柵４５が設けられ，デッキ１５の床面は，張り出しデッキ又は延長デッキを採用する図示の実施形態にあっては，第１床面１５ａ及び第２床面１５ｂの二重に構成されている。   In addition, a protective fence 45 is provided on the deck 15, and the floor surface of the deck 15 is the first floor surface 15a and the second floor surface 15b in the illustrated embodiment employing an overhang deck or an extension deck. It is composed of double.

図３に示すように，昇降機構１４は，デッキ１５の幅方向側面に対応する機体１０の左右両側（本明細書において「左右」という）で，それぞれ前記デッキ１５の幅方向側面の内外側に同一長さのアウターアーム及びインナーアームとしてＸ字状に交点を枢着された複数のＸ字状リンクから成る左右１対のＸ字状リンク１６，１７を複数段，ここでは，Ｘ字状リンクを１段として，４段（１６ａ〜１６ｄ，１７ａ〜１７ｄ）に枢着連結したもので，左右の各Ｘ字状リンク１６，１７を下段のＸ字状リンクの端縁と，上段のＸ字状リンクの端縁との連結部において，それぞれ下段の内側に位置するインナーアーム１６１と上段の外側に位置するアウターアーム１６２を，又，下段の外側に位置するアウターアーム１６２と上段の内側に位置するインナーアーム１６１を連結するように，左右のＸ字状リンク１６，１７を各ロッド２１を介して回動自在に連結している。   As shown in FIG. 3, the elevating mechanism 14 is provided on the inner and outer sides of the side surface in the width direction of the deck 15 on both the left and right sides (referred to herein as “left and right”) of the airframe 10 corresponding to the side surface in the width direction of the deck 15. A pair of left and right X-shaped links 16 and 17 consisting of a plurality of X-shaped links pivoted at X-shaped intersections as outer arms and inner arms of the same length, here, X-shaped links Is connected to 4 stages (16a to 16d, 17a to 17d), and the left and right X-shaped links 16, 17 are connected to the edge of the lower X-shaped link and the upper X-shaped link. The inner arm 161 located on the inner side of the lower stage and the outer arm 162 located on the outer side of the upper stage, and the outer arm 162 positioned on the outer side of the lower stage and the inner side of the upper stage, respectively, are connected to the end of the link. Do To connect the N'naamu 161, the left and right X-shaped links 16, 17 rotatably connected to via a respective rod 21.

そして，詳細は図示省略するが，最下段のＸ字状リンク１６ａ，１７ａのインナーアーム１６１の下端部が車台１３の前端部に枢着され，最下段のアウターアーム１６２下端部が車台１３の後部で機体１０長手方向へ摺動自在に支持され，さらに，最上段のＸ字状リンク１６ｄ，１７ｄのインナーアーム１６１上端部がデッキ１５の後部にデッキ長手方向へ摺動可能に支持され，アウターアーム１６２の上端部は，デッキ１５の前端部に枢着されている。   Although not shown in detail, the lower end of the inner arm 161 of the lowermost X-shaped links 16a and 17a is pivotally attached to the front end of the chassis 13, and the lower end of the outermost arm 162 is the rear part of the chassis 13. The upper end of the inner arm 161 of the uppermost X-shaped links 16d and 17d is supported at the rear of the deck 15 so as to be slidable in the longitudinal direction of the deck. The upper end portion of 162 is pivotally attached to the front end portion of the deck 15.

又，最上段及び最下段の左右のＸ字状リンク１６ｄ，１７ｄ及び１６ａ，１７ａの交点は，両Ｘ字状リンクを構成する各アウターアーム及びインナーアームと共に枢着軸２０ｂ，２０ａで連結されている。なお，中間段の左右のＸ字状リンク１６ｂ，１６ｃの交点は，左右それぞれ別々にインナーアームとアウターアームとが枢着軸で連結されている。   Also, the intersections of the left and right X-shaped links 16d, 17d and 16a, 17a in the uppermost and lowermost stages are connected to each other by the pivot shafts 20b, 20a together with the outer and inner arms constituting both X-shaped links. Yes. In addition, at the intersection of the left and right X-shaped links 16b, 16c in the intermediate stage, the inner arm and the outer arm are separately connected by a pivot shaft respectively on the left and right.

又，昇降機構１４は上下複数段に枢着して連結された左右一対の各Ｘ字状リンク１６ａ〜ｄ，１７ａ〜ｄを垂直方向に移動させる油圧シリンダ１９を備える。   The elevating mechanism 14 includes a hydraulic cylinder 19 that moves a pair of left and right X-shaped links 16a to 16d and 17a to 17d that are pivotally connected to a plurality of upper and lower stages in the vertical direction.

油圧シリンダ１９は，最下段のＸ字状リンク１６ａ，１７ａの左右のインナーアーム１６１，１６１にそれぞれ設けられたシリンダ取付用ブラケット２６，２６間に架設された枢軸にシリンダ１９ａが枢着され，その２段上方に位置するＸ字状リンク１６ｃ，１７ｃの左右のインナーアーム１６１，１６１にそれぞれ設けられたシリンダ取付用ブラケット２８，２８間に架設された枢軸にピストンロッド１９ｂが枢着されている。   The hydraulic cylinder 19 has a cylinder 19a pivotally mounted on a pivot provided between cylinder mounting brackets 26 and 26 provided on the left and right inner arms 161 and 161 of the lowermost X-shaped links 16a and 17a. A piston rod 19b is pivotally attached to a pivot provided between cylinder mounting brackets 28 and 28 provided on the left and right inner arms 161 and 161 of the X-shaped links 16c and 17c located two steps above.

そして，前記油圧シリンダ１９によって昇降機構１４が作動し，デッキ１５が水平状態を保って昇降する。   Then, the lifting mechanism 14 is operated by the hydraulic cylinder 19, and the deck 15 is moved up and down while maintaining a horizontal state.

以下，本発明に係る前記シザースリンク機構の伸張を規制する伸張規制手段について，説明する。   Hereinafter, the extension restricting means for restricting the extension of the scissor link mechanism according to the present invention will be described.

図４（Ａ）〜図４（Ｃ）に示すように，前記昇降機構１４の最上段の左右のＸ字状リンク１６ｄ，１７ｄの交点を連結する枢着軸２０ｂには，機体１０の重心Ｇの略垂直線上もしくはこれから均等に左右に延長した位置に懸吊具３０が配置され，回動自在に取付けられる。該懸吊具３０は，その上端にクレーン等のフックに掛止する孔部もしくは，フック状の掛止体を有する掛止部３１が形成されており，この掛止部３１はデッキ１５の床面１５ａの下方に位置している。そして，前記懸吊具３０の下端は，懸吊具３０と一体に前記枢着軸２０ｂ上を回動する，ここでは，フック状の係合部３４，３４が形成されている。図示の実施形態における懸吊具３０では，前記枢着軸２０ｂに対して回動自在にこの枢着軸に外嵌した支軸４０たる軸管２９ｂを設け，前記軸管２９ｂの軸心に対して直交方向に設けた掛止部３１を設けて該軸管に固着形成し，前記軸管２９ｂの軸心に対して前記掛止部３１と点対称の位置に，フック状板片から成る２の係合部３４，３４を設け，この係合部３４，３４を支軸４０を成す軸管２９ｂの両軸端方向に等位置において，固着形成している。   As shown in FIGS. 4A to 4C, the center of gravity G of the airframe 10 is connected to the pivot shaft 20b connecting the intersections of the left and right X-shaped links 16d and 17d in the uppermost stage of the lifting mechanism 14. The suspension tool 30 is disposed on a substantially vertical line or at a position extending from the left and right evenly and is attached rotatably. The suspension 30 is formed with a hole portion hooked to a hook such as a crane or a hook portion 31 having a hook-like hook body at the upper end thereof. It is located below the surface 15a. And the lower end of the said suspension tool 30 rotates on the said pivot shaft 20b integrally with the suspension tool 30, and the hook-shaped engaging parts 34 and 34 are formed here. In the suspension tool 30 in the illustrated embodiment, a shaft tube 29b is provided as a support shaft 40 that is externally fitted to the pivot shaft 20b so as to be rotatable with respect to the pivot shaft 20b. The hook portion 31 provided in the orthogonal direction is fixedly formed on the shaft tube, and is formed of a hook-like plate piece at a point symmetric with the hook portion 31 with respect to the axis of the shaft tube 29b. The engaging portions 34, 34 are provided, and the engaging portions 34, 34 are fixedly formed at equal positions in both shaft end directions of the shaft tube 29b forming the support shaft 40.

前記軸管２９ｂには，平時，前記懸吊具３０の掛止部３１及び係合部３４が最上段のＸ字状リンク１６ｄのアウターアーム１６２に沿って固定されるよう，枢着軸２０ｂと連結する図示せざるストッパーが設けられている。   At the normal time, the hooking portion 31 and the engaging portion 34 of the suspension 30 are fixed to the shaft tube 29b along the outer arm 162 of the uppermost X-shaped link 16d. A stopper (not shown) to be connected is provided.

なお，図２（Ｂ）に示すように，前記懸吊具３０及び固定具３５は，前述実施形態に於ける，それぞれ，最上段及び最下段の左右のＸ字状リンク１６ｄ，１７ｄ，１６ａ，１７ａの交点に限らず，Ｘ字状リンク１６ｄ，１７ｄ，１６ａ，１７ａの交点に配置される支軸４０を成す枢着軸と，懸吊具３０が回動する枢着軸とを別々に構成し，懸吊具３０が回動する支軸４０を成す枢着軸をＸ字状リンクの交点に対して図中左方向へ移動させて，両Ｘ字状リンク１６ｄ，１７ｄ，１６ａ，１７ａを同一平面上で連結し，機体１０の重心Ｇの略垂直線上に懸吊具３０を配置させてもよい。   As shown in FIG. 2B, the suspension tool 30 and the fixing tool 35 are respectively the left and right X-shaped links 16d, 17d, 16a, Not only the intersection of 17a, but also the pivot shaft that forms the support shaft 40 arranged at the intersection of the X-shaped links 16d, 17d, 16a, and 17a and the pivot shaft that the suspension 30 rotates are configured separately. Then, the pivot shaft which forms the support shaft 40 on which the suspension 30 rotates is moved leftward in the figure with respect to the intersection of the X-shaped links, and both the X-shaped links 16d, 17d, 16a and 17a are moved. They may be connected on the same plane, and the suspension tool 30 may be disposed on a substantially vertical line of the center of gravity G of the airframe 10.

又，デッキ１５の第１床面１５ａ及びこれに対して摺動し，デッキを拡張する第２床面１５ｂには，前記２の床面が重畳位置で，前記懸吊具３０をのぞませる開口部３２が形成され，この開口部３２には，必要に応じ，蓋体３３が開閉自在に設けられている。なお，上記開口部３２が懸吊具３０の掛止部３１が回動して床上に突出させることができるスリット状のものとすることもできる。   Further, the second floor surface 15b that slides relative to the first floor surface 15a of the deck 15 and expands the deck is placed at the overlapping position of the second floor surface, and the suspension tool 30 is looked over. An opening 32 is formed, and a lid 33 is provided in the opening 32 so as to be freely opened and closed as necessary. In addition, the said opening part 32 can also be made into the slit-shaped thing which the latching | locking part 31 of the suspension tool 30 can rotate and make it protrude on a floor.

そして，最下段のＸ字状リンク１６ａ，１７ａの交点を，各アウターアーム及びインナーアームと共に連結する枢着軸２０ａ上には，左右のインナーアームを連結し，前記枢着軸２０ａを外嵌する軸管２９ａを設け，前記デッキ１５の最下降位置で，前記Ｘ字状リンクを固定して，懸吊時にＸ字状リンクが伸張して開かないようにするための固定具３５が配置される。   Then, the left and right inner arms are connected to the pivot shaft 20a that connects the intersection of the lowermost X-shaped links 16a and 17a together with the outer and inner arms, and the pivot shaft 20a is externally fitted. A shaft tube 29a is provided, and the X-shaped link is fixed at the lowest lowered position of the deck 15, and a fixing tool 35 is arranged to prevent the X-shaped link from being extended and opened when suspended. .

なお，前記固定具３５は最下段のＸ字状リンク１６ａ，１７ａの左右のインナーアームを連結する軸管２９ａに設けることに限らず，油圧シリンダ１９と干渉しない範囲で，最下段のＸ字状リンク１６ａ，１７ａと最上段のＸ字状リンク１６ｄ，１７ｄとの間の中間段のＸ字状リンク１６ｂ，１７ｂ，又は１６ｃ，１７ｃの左右のインナーアームを連結する軸管２９ａを設け，この軸管２９ａに固定具３５を設けてもよい。   The fixing member 35 is not limited to being provided on the shaft tube 29a that connects the left and right inner arms of the lowermost X-shaped links 16a and 17a, and the lowermost X-shaped link is within a range that does not interfere with the hydraulic cylinder 19. A shaft tube 29a is provided to connect the left and right inner arms of the intermediate X-shaped links 16b, 17b or 16c, 17c between the links 16a, 17a and the uppermost X-shaped links 16d, 17d. A fixture 35 may be provided on the tube 29a.

図４（Ａ）〜（Ｃ）に示す実施形態では，支軸４０を成す前記軸管２９ｂ上に，略垂直に，前記係合部３４，３４の回動軌跡において，２の固定具３５である係合杆３６，３６を立設し，この係合杆に前記係合部３４，３４が，前記懸吊具の回動軌跡において，嵌合，係合離脱自在と成す係合孔３７，３７を穿設形成したものである。   In the embodiment shown in FIGS. 4 (A) to 4 (C), the two fixtures 35 are arranged on the shaft tube 29b forming the support shaft 40 substantially perpendicularly in the rotational trajectory of the engaging portions 34, 34. A certain engagement rod 36, 36 is erected, and the engagement portion 34, 34 is engaged with and disengageable in the rotation trajectory of the suspension tool, 37 is formed by drilling.

固定具３５は，前記懸吊具３０の係合部３４，３４が係合すればよく，特に形状，構造等に限定を要しないが，図５（Ａ），（Ｂ）に示す本発明の固定具３５の他の実施形態においては，前記係合部３４，３４及びこれに対応して係合杆３６，３６の構成を変更したものである。   The fixing device 35 only needs to be engaged with the engaging portions 34 of the suspension 30, and the shape, structure, etc. are not particularly limited, but the fixing device 35 of the present invention shown in FIGS. In another embodiment of the fixture 35, the configuration of the engaging portions 34, 34 and the engagement rods 36, 36 is changed correspondingly.

図５（Ａ）において，前記係合部３４，３４の下端をフック状とせずに，懸吊具３０を，両端に係合ピン３８，３８を形成した係合杆とし，支軸４０を成す前記軸管２９ｂ上に，垂直に２の係合杆３６，３６を立設し，この係合杆３６，３６に前記係合ピン３８，３８の回動軌跡において，該ピン３８，３８に係合可能な係合凹部３９，３９を設けたものである。   In FIG. 5 (A), the lower end of the engaging portions 34, 34 is not hook-shaped, and the suspension 30 is an engaging rod having engaging pins 38, 38 formed at both ends to form a support shaft 40. Two engaging rods 36, 36 are vertically installed on the shaft tube 29b, and the engaging rods 36, 36 are engaged with the pins 38, 38 in the rotation trajectory of the engaging pins 38, 38. Engaging recesses 39, 39 are provided.

支軸４０を成す前記軸管２９ｂに必要な剛性があれば，これを固定具３５の係合杆３６として前記軸管２９ｂに対して係合するようにしてもよい（図５（Ｂ））。   If the shaft tube 29b forming the support shaft 40 has a necessary rigidity, it may be engaged with the shaft tube 29b as an engagement rod 36 of the fixture 35 (FIG. 5B). .

又，前記懸吊具３０の掛止具３１は，他の構成を図４に示すものと同様で，掛止具として，２の掛止孔３１，３１を設けた構成としてもよく，これにより，機体１０の懸吊時，機体が安定して安全性を向上することができる（図５（Ｃ））。   Further, the latching tool 31 of the suspension tool 30 has the same configuration as that shown in FIG. 4 and may be configured to have two latching holes 31 and 31 as a latching tool. When the airframe 10 is suspended, the airframe can be stabilized and the safety can be improved (FIG. 5C).

又，デッキ１５の床面１５ａ，１５ｂの蓋体３３ａ，３３ｂは閉じられており，床面1５ａ，１５ｂと略同一平面を形成している。   Further, the lid bodies 33a and 33b of the floor surfaces 15a and 15b of the deck 15 are closed and form substantially the same plane as the floor surfaces 15a and 15b.

機体１０をクレーン等で吊り上げる場合には，図１に示すように昇降機構１４を縮めてデッキ１５を最下降位置に位置させ，ついで，デッキ１５の床面１５ａ，１５ｂの蓋体３３ａ，３３ｂを開放し，懸吊具３０の支軸４０を成す軸管２９ｂと枢着軸２０ｂと連結する図示せざるストッパーを外して懸吊具３０を回動し，掛止部３１を開口部３２から床面上に突出させる。   When lifting the aircraft 10 with a crane or the like, as shown in FIG. 1, the lifting mechanism 14 is contracted to place the deck 15 in the lowest lowered position, and then the lids 33a and 33b of the floor surfaces 15a and 15b of the deck 15 are moved. The stopper 30 (not shown) connected to the shaft tube 29b that forms the support shaft 40 of the suspension 30 and the pivot shaft 20b is removed, the suspension 30 is rotated, and the latch 31 is opened from the opening 32 to the floor. Project on the surface.

この懸吊具３０の回動と同時に，係合部３４が回動し，Ｘ字状リンク１６ａ，１７ａ間に架設した支軸４０を成す軸管２９ｂ上の係合杆３６の係合孔３７，３７に係合部３４のフック状先端が前記係合孔内に嵌合して係合する（図４）。図５（Ａ）に示す実施形態では，係合ピン３８，３８が固定具３５の係合片３６，３６に形成した係合凹部３９，３９に係合する。又，同図（Ｂ）に示す実施形態では，懸吊具３０のフック状係合部３４が，固定具を成す前記軸管２９ｂに係合する。   Simultaneously with the rotation of the suspension 30, the engaging portion 34 rotates, and the engagement hole 37 of the engagement rod 36 on the shaft tube 29b that forms the support shaft 40 laid between the X-shaped links 16a and 17a. 37, the hook-shaped tip of the engaging portion 34 is engaged with and engaged with the engaging hole (FIG. 4). In the embodiment shown in FIG. 5A, the engagement pins 38, 38 are engaged with engagement recesses 39, 39 formed in the engagement pieces 36, 36 of the fixture 35. Further, in the embodiment shown in FIG. 5B, the hook-like engaging portion 34 of the suspension tool 30 is engaged with the shaft tube 29b constituting the fixing tool.

そして，懸吊具３０の掛止部３１にクレーン等のフックを掛止して吊り上げると，前記懸吊具３０の係合部３４と，固定具３５の係合孔３７，３７又は係合凹部３９，３９に対する係合ピン３８，３８は，懸吊具３０の懸吊により，その係合を一層強固なものとされ，前記シザースリンク機構の伸張を規制し，又，懸吊具３０は，機体１０の重心の略垂直線上に配置されているため，機体１０を略重心位置で，懸吊し，機体１０は略水平状態で吊り上げられる。   When a hook such as a crane is hooked on the hook 31 of the suspension 30 and lifted, the engagement portion 34 of the suspension 30 and the engagement holes 37 and 37 of the fixture 35 or the engagement recesses are formed. The engagement pins 38, 38 with respect to 39, 39 are made stronger by the suspension of the suspension 30 to restrict the extension of the scissor link mechanism. Since the airframe 10 is disposed on a substantially vertical line of the center of gravity of the airframe 10, the airframe 10 is suspended at a substantially center of gravity position, and the airframe 10 is lifted in a substantially horizontal state.

図６（Ａ），（Ｂ）に示す実施形態では，固定具３５は，車台１３に設けられている。   In the embodiment shown in FIGS. 6A and 6B, the fixture 35 is provided on the chassis 13.

この固定具３５は，車台１３上に１組のブラケット５２，５２を左右それぞれ一対に立設し，それぞれのブラケット間を架橋するようにピン５３が架設されている。懸吊具３０の係合部３４は車台１３に設けた前記固定具３５に係合する。   In this fixture 35, a pair of brackets 52, 52 are erected on the chassis 13 as a pair, and a pin 53 is installed so as to bridge the brackets. The engaging portion 34 of the hanging tool 30 engages with the fixing tool 35 provided on the chassis 13.

本実施形態では，ブラケット５２，５２を車台１３に溶接して固定しているが，ボルトやリベットなどで固着することもできる。   In the present embodiment, the brackets 52 and 52 are fixed to the chassis 13 by welding, but can be fixed with bolts or rivets.

又，支軸４０を成す軸管２９ｂを軸管２９１ｂと軸管とその両側に配置される軸管２９２ｂ,２９２ｂに分割とし，懸吊具３０の掛止部３１を中央の軸管２９１ｂに固着し，懸吊具３０の係合部３４を中央の軸管２９１ｂに対して左右に配置した軸管２９２ｂ，２９２ｂに固着する。   Further, the shaft tube 29b forming the support shaft 40 is divided into a shaft tube 291b, a shaft tube, and shaft tubes 292b and 292b arranged on both sides thereof, and the hooking portion 31 of the suspension 30 is fixed to the central shaft tube 291b. Then, the engaging portion 34 of the suspension tool 30 is fixed to the shaft tubes 292b and 292b arranged on the left and right with respect to the central shaft tube 291b.

さらに，図７（Ｂ）及び図１０に示すように，軸管２９１ｂと軸管２９２ｂとが当接し組み合わされる軸端部に凸部４２と凹部４３をそれぞれ形成し，掛止部３１の操作により係合部３４が動作するように構成している。   Further, as shown in FIGS. 7B and 10, a convex portion 42 and a concave portion 43 are formed at the shaft end where the shaft tube 291 b and the shaft tube 292 b are brought into contact with each other, and the operation of the latching portion 31 is performed. The engaging portion 34 is configured to operate.

本実施形態では，軸管２９１ｂの両軸端に凸部４２（，４２）を形成し，軸管２９２ｂ,２９２ｂの軸管２９１側の軸端に前記凸部幅よりも大きい幅の凹部（切り欠き）４３，４３を形成し，掛止部３１の回動操作に遅れて凹凸部４２，４２，４３，４３が係合し，それにより係合部３４が回動する。   In this embodiment, convex portions 42 (42) are formed at both axial ends of the shaft tube 291 b, and concave portions (cuts) larger than the convex portion width are formed at the shaft ends of the shaft tubes 292 b and 292 b on the shaft tube 291 side. (Notch) 43, 43 are formed, and the concave and convex portions 42, 42, 43, 43 are engaged after the turning operation of the latching portion 31, whereby the engaging portion 34 is rotated.

又，図１１に示すように，軸管２９１ｂ上には操作ボタン４４の先端から突出し，軸管２９１ｂの外周壁に穿設した孔部から，枢着軸２０ｂ（支軸４０）に設けた孔部に挿脱自在となるピン４６を有するロック機構５９を備え，掛止部３１，従って，軸管２９１ｂ上のロック機構５９が共に回動して，同図に示す位置に掛止部３１が達すると，ロック機構５９のピン４６が枢着軸２０ｂ（支軸４０）に設けた孔部に挿入嵌合すると，掛止部３１及び軸管２９１ａの回動を阻止し，係合部３４が固定具３５から離脱することを防止し，安定して安全に掛止部による高所作業車の懸吊作業を確保することができる構成とすることができる。   Further, as shown in FIG. 11, a hole provided on the pivot shaft 20b (support shaft 40) protrudes from the tip of the operation button 44 on the shaft tube 291b and is formed in the outer peripheral wall of the shaft tube 291b. A locking mechanism 59 having a pin 46 that can be inserted and removed at the part, and the locking part 31, and thus the locking mechanism 59 on the shaft tube 291b rotates together, so that the locking part 31 is at the position shown in FIG. When the pin 46 of the locking mechanism 59 is inserted and fitted into the hole provided in the pivot shaft 20b (support shaft 40), the latch portion 31 and the shaft tube 291a are prevented from rotating, and the engaging portion 34 is It can be set as the structure which can prevent detachment | leave from the fixing tool 35 and can ensure the suspension work of the aerial work vehicle by a latching part stably and safely.

上記実施形態特有の作用としては，支軸４０ないし軸管２９ｂを分割したことで，懸吊具３０の掛止部３１の回動角度よりも係合部３４の回動角度を小さくでき，係合部３４が長くなっても他の部品と干渉することを防止できた。   As an action peculiar to the above-described embodiment, by dividing the support shaft 40 or the shaft tube 29b, the rotation angle of the engaging portion 34 can be made smaller than the rotation angle of the latching portion 31 of the suspension 30. Even if the joint portion 34 is long, it can be prevented from interfering with other parts.

図７（Ａ）に示す実施形態において，前述の実施形態では，最上段の左右Ｘ字状リンク間を連結する支軸４０を成す枢着軸２０ｂに外嵌して軸管２９ｂを設けているのに対して，デッキ１５の第１床面１５ａの裏側に左右一組の支軸を支持するブラケット４１，４１を固定し，このブラケットに軸着した支軸４０に軸管２９１ｂと軸管２９２ｂ，２９２ｂを回動自在に外嵌して設け，懸吊具３０の掛止部３１を中央の軸管２９１ｂに固着し，懸吊具３０の係合部３４を中央の軸管２９１ｂに対して左右に配置した軸管２９２ｂ，２９２ｂに固着している。軸管２９１ｂ及び２９２ｂ，２９２ｂの軸端部の構造は図６に示す実施形態と同じである。   In the embodiment shown in FIG. 7A, in the above-described embodiment, the shaft tube 29b is provided by being externally fitted to the pivot shaft 20b that forms the support shaft 40 that connects the upper left and right X-shaped links. On the other hand, brackets 41 and 41 that support a pair of left and right support shafts are fixed to the back side of the first floor surface 15a of the deck 15, and the shaft tube 291b and the shaft tube 292b are attached to the support shaft 40 that is pivotally attached to the bracket. , 292b are provided so as to be pivotably fitted, the latching portion 31 of the suspension 30 is fixed to the central shaft tube 291b, and the engagement portion 34 of the suspension 30 is attached to the central shaft tube 291b. It is fixed to shaft tubes 292b and 292b arranged on the left and right. The structure of the shaft end portions of the shaft tubes 291b and 292b, 292b is the same as that of the embodiment shown in FIG.

本実施形態は固定具３５を車台１３に設けているが，前記懸吊具を回動自在に設けた支軸の下方に位置する何れか１段の左右のＸ字状リンクを同一平面上で連結する枢着軸に固定具を設けても良い。   In the present embodiment, the fixture 35 is provided on the chassis 13, but any one of the left and right X-shaped links positioned below the support shaft on which the suspension is rotatably provided is on the same plane. You may provide a fixing tool in the pivot axis | shaft to connect.

さらに，図８に示す実施形態では，支軸４０を成す軸管２９ｂは一体である。   Furthermore, in the embodiment shown in FIG. 8, the shaft tube 29b forming the support shaft 40 is integral.

前記支軸ないし軸管に固定した懸吊具３０の係合部３４と，車台１３等に設けた固定具３５を省略可能な実施形態である。言うまでもなく，本実施形態において，図１〜図７における懸吊具３０の係合部３４と，車台１３等に設けた固定具３５を有する構成を共に採用してフェイルセイフとして適応することが可能である。   In this embodiment, the engaging portion 34 of the suspension 30 fixed to the support shaft or the shaft tube, and the fixture 35 provided on the chassis 13 or the like can be omitted. Needless to say, in the present embodiment, it is possible to adopt a configuration having the engaging portion 34 of the suspension tool 30 in FIGS. It is.

前記デッキ１５の第１床面１５ａの裏面のブラケット５１に懸吊してリミットスイッチ５０を設ける。このリミットスイッチ５０は，懸吊具３０を回動しデッキの床面１５ｂの開口部３２から，懸吊具３０の上端が前記開口部上に突出した位置にあるとき，リミットスイッチ５０の接点が掛止部３１の端面と接触し信号を送るよう配置される。リミットスイッチ５０の配置位置は，上記に限定されず懸吊具３０がデッキ１５ｂの床面から突出したことを検出できる位置であれよい。又，リミットスイッチ５０に代えて懸吊具３０の回動角度を検出する回転角度センサーとしてもよい。   A limit switch 50 is provided suspended from a bracket 51 on the back surface of the first floor surface 15a of the deck 15. This limit switch 50 rotates the suspension 30 and when the upper end of the suspension 30 protrudes from the opening 32 of the deck floor 15b above the opening, the contact of the limit switch 50 is It arrange | positions so that the end surface of the latching | locking part 31 may be contacted and a signal may be sent. The arrangement position of the limit switch 50 is not limited to the above, and may be a position where it is possible to detect that the suspension tool 30 protrudes from the floor surface of the deck 15b. Further, instead of the limit switch 50, a rotation angle sensor that detects the rotation angle of the suspension 30 may be used.

図９において，作動油タンク６６から，モータ６５に駆動される油圧ポンプ６４を介して，リリーフバルブ６３を分岐する回路を経て上昇用電磁弁６２，そして下降用電磁弁６１から油圧シリンダ１９に至る油圧回路に伸張規制電磁弁６０を設ける。   In FIG. 9, from the hydraulic oil tank 66 to the hydraulic cylinder 19 via the hydraulic pump 64 driven by the motor 65, the circuit for branching the relief valve 63, and the electromagnetic valve 62 for raising and the electromagnetic valve 61 for lowering to the hydraulic cylinder 19. An extension regulating electromagnetic valve 60 is provided in the hydraulic circuit.

この伸張規制用電磁弁６０は高所作業車の図示せざるメインスイッチがＯＦＦのとき，及びリミットスイッチ５０の接点が掛止部３１に接触しているときに図示の回路状態となっている。メインスイッチがＯＮとなり，リミットスイッチ５０の接点がＯＦＦのときにのみ伸張規制電磁弁６０が切り替わり，油圧シリンダ１９が伸張可能状態となる。   The extension regulating electromagnetic valve 60 is in the circuit state shown in the figure when the main switch (not shown) of the aerial work vehicle is OFF and when the contact of the limit switch 50 is in contact with the latching portion 31. Only when the main switch is turned on and the contact of the limit switch 50 is turned off, the expansion regulating solenoid valve 60 is switched, and the hydraulic cylinder 19 is allowed to expand.

高所作業車を懸吊するときには通常メインスイッチがＯＦＦとなっている。これにより，伸張規制電磁弁６０は図の位置に切り替わっており，懸吊により油圧シリンダ１９が伸張側に引っ張られたとしても伸張規制電磁弁６０のチェックバルブで作動油タンク６６内の作動油が吸い込まれることを規制して，油圧シリンダ１９及びシザースリンクが伸張することを阻止する。   When suspending an aerial work vehicle, the main switch is normally OFF. As a result, the extension regulating solenoid valve 60 is switched to the position shown in the drawing, and even if the hydraulic cylinder 19 is pulled to the extension side by suspension, the hydraulic oil in the hydraulic oil tank 66 is not removed by the check valve of the extension regulating solenoid valve 60. By restricting suction, the hydraulic cylinder 19 and the scissor link are prevented from extending.

メインスイッチがＯＮとなっていたとしても，懸吊具３０の掛止部３１がデッキ上に突出すると，リミットスイッチ５０がＯＮで，伸張規制電磁弁６０が図の位置に切り替わる。これにより，メインスイッチがＯＦＦとなっている場合と同様に油圧シリンダ１９及びシザースリンクが伸張することを阻止することができる。   Even if the main switch is ON, when the latching portion 31 of the suspension tool 30 protrudes on the deck, the limit switch 50 is ON and the extension regulating electromagnetic valve 60 is switched to the position shown in the figure. Accordingly, it is possible to prevent the hydraulic cylinder 19 and the scissor link from extending as in the case where the main switch is OFF.

本発明の一実施形態に係る懸吊装置を備えた高所作業車を示し，同図（Ａ）は，正面図，同図（Ｂ）は，平面図，同図（Ｃ）は，側面図，1 shows an aerial work vehicle equipped with a suspension device according to an embodiment of the present invention, where FIG. 1 (A) is a front view, FIG. 1 (B) is a plan view, and FIG. 1 (C) is a side view. , 同図（Ａ）及び（Ｃ）は，それぞれ同実施形態における，図１（Ａ），図１（Ｃ）の一部切欠断面図，同図（Ｂ）は，同図（Ａ）の懸吊装置の他の実施形態を示す，FIGS. 1A and 1C are partially cutaway sectional views of FIGS. 1A and 1C, respectively, and FIG. 1B is a suspension of FIG. Shows another embodiment of the device, 同実施形態におけるＸ字状リンクを伸張した状態の正面図，The front view of the state which extended the X-shaped link in the embodiment, 同実施形態における懸吊具及び固定具を示す部分拡大切欠断面図で，同図（Ａ）は，側面図，（Ｂ）は，正面図，（Ｃ）は，懸吊具３４の拡大図，It is the partial expanded notch sectional view which shows the suspension tool and fixing tool in the embodiment, The figure (A) is a side view, (B) is a front view, (C) is an enlarged view of the suspension tool 34, 懸吊具及び固定具の他の実施形態を示す部分拡大切欠断面図で，同図（Ａ）は，係合ピンによる実施形態を示し，（Ｂ）は，フックによる枢着軸への係合を示し，同図（Ｃ）は，懸吊具の他の実施形態を示す部分拡大図，It is a partial expanded notch sectional view which shows other embodiment of a suspension tool and a fixing tool, The same figure (A) shows embodiment by an engagement pin, (B) is engaging with the pivot axis by a hook. The figure (C) is the elements on larger scale which show other embodiment of a suspension tool, 懸吊具及び固定具のさらに他の実施形態を示す部分拡大切欠断面図で，同図（Ａ）は，車台に固定具を設けた実施形態を示し，（Ｂ）は部分拡大図，It is a partially expanded cutaway sectional view showing still another embodiment of the suspension tool and the fixing tool, the same figure (A) shows an embodiment provided with a fixing tool in the chassis, (B) is a partially enlarged view, 懸吊具及び固定具のさらに他の実施形態を示す部分拡大切欠断面図で，同図（Ａ）は，支軸を枢着軸とは別個に設けた実施形態を示し，（Ｂ）は，支軸の分割構成の実施形態を示す部分拡大図，It is a partially expanded cutaway sectional view showing still another embodiment of the suspension tool and the fixing tool, in which FIG. (A) shows an embodiment in which the support shaft is provided separately from the pivot shaft, and (B) Partial enlarged view showing an embodiment of a split structure of the support shaft, 懸吊具の係合部及び固定具を省略可能な他の実施形態を示す部分拡大切欠断面図で，同図（Ａ），（Ｂ）はそれぞれ部分拡大図，It is a partial expanded notch sectional view which shows other embodiment which can abbreviate | omit the engaging part and fixing tool of a suspension tool, The same figure (A) and (B) is a partially expanded view, 図８に用いる油圧配管系の回路図，Circuit diagram of the hydraulic piping system used in FIG. 図７（Ｂ）における支軸の分割構成の実施形態を示す部分拡大断面図，The partial expanded sectional view which shows embodiment of the division structure of the spindle in FIG.7 (B), 懸吊具のロック機構を示す部分拡大図である。It is the elements on larger scale which show the locking mechanism of a suspension tool.

符号の説明Explanation of symbols

１０…高所作業車（機体）
１２…走行機構
１３…車台
１４…昇降機構
１５…デッキ
１５ａ，１５ｂ…第１，第２床面
１６，１７…左右のＸ字状リンク
１６１…左のＸ字状リンクを成すインナーアーム
１６２…左のＸ字状リンクを成すアウターアーム
１７１…右のＸ字状リンクを成すインナーアーム
１７２…右のＸ字状リンクを成すアウターアーム
１９…油圧シリンダ
２０ａ，２０ｂ…枢着軸
２１…ロッド
２６…連結部材
２８…連結部材
２７…シリンダ
２９ａ，２９ｂ，２９１ｂ，２９２ｂ，２９２ｂ…軸管
３０…懸吊具
３１…掛止部
３２…開口部
３３ａ，３３ｂ…蓋体
３４…係合部
３５…固定具
３６，３６…係合杆
３７，３７…係合孔
３８，３８…係合ピン
３９，３９…係合凹部
４０…支軸（軸管２９ｂ；２９１ｂ，２９２ｂ；，枢着軸２０ｂ）
４１…ブラケット
４２…凸部
４３…凹部
４４…操作ボタン
４５…防護柵
４６…ピン
５０…掛止部位置検出手段（リミットスイッチ）
５１，５２…ブラケット
５３…ピン
５９…ロック機構
６０…伸張規制電磁弁
６１…下降用電磁弁
６２…上昇用電磁弁
６３…リリーフバルブ
６４…油圧ポンプ
６５…モータ
６６…作動油タンク 10 ... Aerial work vehicle (airframe)
DESCRIPTION OF SYMBOLS 12 ... Traveling mechanism 13 ... Chassis 14 ... Elevating mechanism 15 ... Deck 15a, 15b ... 1st, 2nd floor surface 16, 17 ... Left and right X-shaped link 161 ... Inner arm 162 which comprises left X-shaped link ... Left Outer arm 171 forming an X-shaped link ... Inner arm 172 forming a right X-shaped link ... Outer arm 19 forming a right X-shaped link ... Hydraulic cylinders 20a, 20b ... Pivoting shaft 21 ... Rod 26 ... Connection Member 28 ... Connecting member 27 ... Cylinder 29a, 29b, 291b, 292b, 292b ... Shaft tube 30 ... Suspension tool 31 ... Hook 32 ... Opening 33a, 33b ... Lid 34 ... Engagement part 35 ... Fixing tool 36 , 36 ... engagement rods 37, 37 ... engagement holes 38, 38 ... engagement pins 39, 39 ... engagement recesses 40 ... support shaft (shaft tube 29b; 291b, 292b ;, pivot shaft 20b)
41 ... Bracket 42 ... Convex part 43 ... Concave part 44 ... Operation button 45 ... Guard fence 46 ... Pin 50 ... Stop part position detection means (limit switch)
51, 52 ... Bracket 53 ... Pin 59 ... Lock mechanism 60 ... Extension regulating solenoid valve 61 ... Decreasing solenoid valve 62 ... Lifting solenoid valve 63 ... Relief valve 64 ... Hydraulic pump 65 ... Motor 66 ... Hydraulic oil tank

Claims (7)

車台とデッキとの間に複数段のＸ字状リンクを配したシザースリンク機構を設け，該シザースリンク機構によって前記デッキを昇降させる高所作業車において，
前記デッキの下方位置に配置される左右のＸ字状リンク間の同一平面上に配置された支軸に懸吊具を回動自在に設け，
前記懸吊具の回動軌跡において，少なくとも前記懸吊具の掛止部を前記懸吊具の上方位置のデッキ床面に形成した開口部から前記床面上に突出可能とし，
前記係止部が前記床面上に突出したとき，該位置への前記懸吊具の回動によって前記シザースリンク機構の伸張を規制する，伸張規制手段を設けたことを特徴とする高所作業車の懸吊装置。 In an aerial work vehicle in which a scissor link mechanism having a plurality of X-shaped links arranged between a chassis and a deck is provided, and the deck is moved up and down by the scissor link mechanism,
A suspension is rotatably provided on a support shaft arranged on the same plane between the left and right X-shaped links arranged at the lower position of the deck,
In the pivot trajectory of the suspension, at least a latching portion of the suspension can be projected on the floor surface from an opening formed on the deck floor surface above the suspension,
Elevation work characterized by comprising an extension restricting means for restricting the extension of the scissor link mechanism by the rotation of the suspension to the position when the locking part protrudes on the floor surface Car suspension device. 前記支軸は，前記デッキの下方位置に配置される左右のＸ字状リンクを同一平面上で連結するいずれかの枢着軸であることを特徴とする請求項１記載の高所作業車の懸吊装置。   2. The aerial work vehicle according to claim 1, wherein the support shaft is any pivot shaft that connects left and right X-shaped links arranged at a position below the deck on the same plane. Suspension device. 前記伸張規制手段は，The extension regulating means is
前記デッキの最下降位置で前記シザースリンク機構の伸張を規制することを特徴とする請求項１又は２記載の高所作業車の懸吊装置。  The suspension device for an aerial work vehicle according to claim 1 or 2, wherein extension of the scissor link mechanism is restricted at a lowest position of the deck. 前記伸張規制手段は，前記懸吊具に係合部を形成すると共に，前記懸吊具を回動自在に設けた支軸の下方に位置する何れか１段の左右のＸ字状リンクを同一平面上で連結する枢着軸に固定具を設け，
前記懸吊具の回動軌跡において，前記懸吊具の上方位置のデッキ床面に形成した開口部から前記床面上に少なくとも前記懸吊具の掛止部を突出したとき，前記係合部が前記固定具に係合し，前記シザースリンク機構の伸張を規制することを特徴とする請求項１〜３いずれか１項記載の高所作業車の懸吊装置。 The extension restricting means forms an engaging portion on the suspension and has the same left and right X-shaped links positioned below a support shaft on which the suspension is rotatably provided. A fixing tool is provided on the pivot shaft connected on the plane,
In the pivot trajectory of the suspension, when the latching portion of the suspension is protruded from the opening formed on the deck floor above the suspension at least on the floor, the engagement portion There wherein engages the fastener, the scissors linkage aerial platforms of suspending device of claim 1 any one of claims, characterized in that to regulate the extension of. 前記伸張規制手段は，前記懸吊具に係合部を形成すると共に，前記車台に固定具を設け，
前記懸吊具の回動軌跡において，前記懸吊具の上方位置のデッキ床面に形成した開口部から前記床面上に少なくとも前記懸吊具の掛止部を突出したとき，前記係合部が前記固定具に係合し，前記シザースリンク機構の伸張を規制することを特徴とする請求項１〜３いずれか１項記載の高所作業車の懸吊装置。 The expansion restriction means is adapted to form the engagement portion on the suspension device, it sets the solid Teigu said chassis,
In the pivot trajectory of the suspension, when the latching portion of the suspension is protruded from the opening formed on the deck floor above the suspension at least on the floor, the engagement portion The suspension device for an aerial work vehicle according to claim 1 , wherein the suspension device engages with the fixture and restricts extension of the scissor link mechanism . 前記懸吊具を回動自在に設けた支軸は，前記Ｘ字状リンクの交点を連結する枢着軸に嵌装した軸管であって，前記固定具は，前記懸吊具を回動自在に設けた支軸の下方に位置する前記Ｘ字状リンクの交点を連結する枢着軸に嵌装した軸管を介して前記枢着軸に設けたことを特徴とする請求項４記載の高所作業車の懸吊装置。 The support shaft on which the suspension is rotatably provided is a shaft tube fitted on a pivot shaft that connects the intersections of the X-shaped links, and the fixing device rotates the suspension. 5. The pivoting shaft according to claim 4, wherein the pivoting shaft is provided via a shaft tube fitted to a pivoting shaft that connects the intersections of the X-shaped links positioned below a freely provided spindle. Suspension device for aerial work platforms. 前記シザースリンク機構は，油圧シリンダを備え，該油圧シリンダの伸縮動作によって前記シザースリンク機構が作動し，前記デッキを昇降する構成であって，
前記伸張規制手段は，前記懸吊具の回動軌跡において，前記懸吊具の上方位置のデッキ床面に形成した開口部から前記床面上に少なくとも前記懸吊具の掛止部を突出したことを検出する掛止部位置検出手段と，前記油圧シリンダへの作動油を流通又は遮断する作動油遮断手段とを設け，
前記懸吊具の回動軌跡において，前記懸吊具の上方位置のデッキ床面に形成した開口部から前記床面上に少なくとも前記懸吊具の掛止部を突出したことを検出する掛止部位置検出手段の検出信号で，前記油圧シリンダへの作動油を遮断するよう前記作動油遮断手段を作動させ，前記シザースリンク機構の伸張を規制することを特徴とする請求項１〜６いずれか１項記載の高所作業車の懸吊装置。 The scissor link mechanism includes a hydraulic cylinder, and the scissor link mechanism is operated by an expansion and contraction operation of the hydraulic cylinder to raise and lower the deck.
The extension restricting means protrudes at least a latching portion of the suspension tool on the floor surface from an opening formed on a deck floor surface above the suspension device in a rotation trajectory of the suspension device. A hooking portion position detecting means for detecting this, and a hydraulic oil blocking means for circulating or blocking the hydraulic oil to the hydraulic cylinder,
A latch for detecting that at least a latching portion of the suspension tool is projected on the floor surface from an opening formed in a deck floor surface above the suspension tool in a rotation trajectory of the suspension tool. 7. The expansion of the scissor link mechanism is restricted by operating the hydraulic oil shut-off means so as to shut off the hydraulic oil to the hydraulic cylinder by a detection signal of the part position detecting means . A suspension device for an aerial work vehicle according to claim 1 .

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