JP5869349B2 - Operating unit cover structure of work platform in aerial work platform - Google Patents

Operating unit cover structure of work platform in aerial work platform Download PDF

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JP5869349B2
JP5869349B2 JP2012015353A JP2012015353A JP5869349B2 JP 5869349 B2 JP5869349 B2 JP 5869349B2 JP 2012015353 A JP2012015353 A JP 2012015353A JP 2012015353 A JP2012015353 A JP 2012015353A JP 5869349 B2 JP5869349 B2 JP 5869349B2
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cover
unit cover
operation unit
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JP2013154980A (en
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啓一 都築
啓一 都築
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Tadano Ltd
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Description

本願発明は、高所作業車の作業台に設けた操作ボックスの上面部（各種操作手段が設けられている）を操作部カバーで開閉自在に被覆した高所作業車における作業台の操作部カバー構造に関するものである。   The present invention provides an operation unit cover for a work platform in an aerial work vehicle in which an upper surface portion (provided with various operation means) of an operation box provided on a work platform of an aerial work vehicle is covered with an operation unit cover so as to be opened and closed. Concerning structure.

高所作業車は、車両上に旋回台を設け、該旋回台に起伏及び伸縮自在なブームを取付けるとともに、該ブームの先端部に作業台を取付けたものである。   An aerial work platform is a vehicle in which a swivel base is provided on a vehicle, a boom that can be raised and lowered is attached to the swivel base, and a work base is attached to the tip of the boom.

高所作業車の作業台には、高所作業に関する各種操作を行う操作ボックスが設けられている。この操作ボックスの上面部には、各種操作（例えば、旋回台の旋回操作、ブームの起伏及び伸縮操作、作業台の首振り操作、ウインチ操作等）を行うための多数の操作手段が設けられている。   The work platform of the aerial work platform is provided with an operation box for performing various operations related to the aerial work. On the upper surface of the operation box, there are provided a number of operation means for performing various operations (for example, a swivel turning operation, a boom raising / lowering operation, a swinging operation of a work table, a winch operation, etc.). Yes.

又、この種の高所作業車の中には、操作ボックスの上面部に、非作業時において各種操作手段を保護（ガード）したり汚れ防止のための操作部カバーを開閉自在に取付けたものがある。尚、操作ボックスの上面部に操作部カバーを取付けたものとして、例えば特開２００４−２２４４６５号公報（特許文献１）や実開平５−８９３９４号公報（特許文献２）等がある。   Also, in this type of aerial work vehicle, various operation means are protected (guarded) when not in operation, and an operation unit cover for preventing dirt is attached to the upper surface of the operation box so that it can be opened and closed. There is. In addition, as what attached the operation part cover to the upper surface part of the operation box, there exist Unexamined-Japanese-Patent No. 2004-224465 (patent document 1), Japanese Utility Model Laid-Open No. 5-89394 (patent document 2), etc., for example.

ところで、上記特許文献１や特許文献２に使用されている操作部カバーは、カバー形態としてそれぞれボックス型のものが採用されている。そして、これらの特許文献の操作部カバーは、カバー奥辺部を操作ボックスの上面部にヒンジ結合して、カバー前辺部を弧回動式に開閉し得るようになっており、この操作部カバーの開放状態では、操作ボックスの上面部の全面が全開放されるようになっている。   By the way, the operation part covers used in the above-mentioned Patent Document 1 and Patent Document 2 each employ a box-type cover. The operation unit covers of these patent documents are configured such that the back side of the cover is hinged to the upper surface of the operation box, and the front side of the cover can be opened and closed in an arc-rotating manner. When the cover is opened, the entire upper surface of the operation box is fully opened.

特開２００４−２２４４６５号公報JP 2004-224465 A 実開平５−８９３９４号公報Japanese Utility Model Publication No. 5-89394

ところで、上記特許文献１や特許文献２に使用されている操作部カバーは、完全閉姿勢と完全開放姿勢との２位置でのみ停止できるようになっている。即ち、非作業時には操作部カバーを完全閉姿勢にする一方、作業時には操作部カバーを完全閉姿勢から奥側に大きく弧回動させることで操作ボックスの上面部を全面開放させる（各種操作手段を操作できる）。尚、これらの特許文献の操作部カバーでは、上記完全閉姿勢と完全開放姿勢との間の中間姿勢で位置保持させることはできないものである。   By the way, the operation unit cover used in Patent Document 1 and Patent Document 2 can be stopped only at two positions of a completely closed posture and a fully opened posture. That is, while the operation unit cover is in the fully closed position when not working, the operation unit cover is largely arc-turned from the fully closed position to the far side during work, thereby opening the entire upper surface of the operation box (with various operation means). Can be manipulated). Note that the operation unit covers of these patent documents cannot be held in an intermediate position between the fully closed position and the fully open position.

ところが、特に寒冷地では降雪中に高所作業を行う場合が多々あるが、高所作業時に降雪量が多いと、操作部カバーを開放させた状態では操作ボックス上にも積雪するようになる。そして、このように操作ボックス上に積雪すると、各種操作手段の表示部（銘板）が雪で隠されて見えなくなったり（誤操作の原因になる）、極低温時には積雪部分が凍結して操作手段が動きにくくなる（操作しにくくなる）という問題が発生していた。   However, particularly in cold regions, there are many cases where work is performed at high places during snowfall. However, if there is a large amount of snowfall during work at high places, snow will also accumulate on the operation box when the operation unit cover is opened. When snow is accumulated on the operation box in this way, the display part (nameplate) of various operation means is hidden by snow and becomes invisible (causes erroneous operation), and the snowy part freezes at extremely low temperatures and the operation means becomes There was a problem that it became difficult to move (becomes difficult to operate).

そこで、本願発明は、操作ボックスの上面部を操作部カバーで開閉し得るようにした操作部カバー構造において、高所作業時（操作ボックスの上面部の各種操作手段を手で操作できる状態）に降雪していても、操作ボックス上面（各種操作手段部分）に積雪しないようにできるようにすることを目的としている。   Accordingly, the present invention provides an operation unit cover structure in which the upper surface of the operation box can be opened and closed by the operation unit cover, when working at a high place (a state in which various operation means on the upper surface of the operation box can be operated by hand). The object is to prevent snow from falling on the upper surface of the operation box (various operation means) even if it is snowing.

本願発明は、上記課題を解決するための手段として次の構成を有している。   The present invention has the following configuration as means for solving the above problems.

［本願請求項１の発明］
本願請求項１の発明は、高所作業車の作業台に設けた操作ボックスの上面部に各種の操作を行う各操作手段を設け、さらに該各操作手段の上方を開閉自在な操作部カバーで被覆した高所作業車における作業台の操作部カバー構造を対象にしている。 [Invention of Claim 1 of the Present Application]
According to the first aspect of the present invention, each operation means for performing various operations is provided on an upper surface portion of an operation box provided on a work platform of an aerial work platform, and an operation unit cover that can be opened and closed is provided above each operation means. It is intended for the operating unit cover structure of a work platform in a covered aerial work vehicle.

以下の説明では、本願の発明「高所作業車における作業台の操作部カバー構造」を単に「操作部カバー構造」ということがある。又、本願発明の説明において、カバー奥辺部とは操作部カバーにおける作業台内から見て作業台外方側の辺部のことであり、カバー前辺部とは同じく操作部カバーにおける作業台内から見て作業台内方側の辺部のことである。さらに、本願発明の説明においては、操作部カバーの奥辺部側を奥側といい、操作部カバーの前辺部側を手前側ということがある。又、本願の説明では、操作部カバーの奥辺部を単にカバー奥辺部といい、操作部カバーの前辺部を単にカバー前辺部ということがある。   In the following description, the invention “operation unit cover structure of a work table in an aerial work vehicle” may be simply referred to as “operation unit cover structure”. In the description of the present invention, the back part of the cover refers to the side of the operation unit cover that is on the outer side of the work table, and the front side of the cover is the work table of the operation unit cover. It is the side of the work table inward as viewed from the inside. Furthermore, in the description of the present invention, the back side of the operation unit cover may be referred to as the back side, and the front side of the operation unit cover may be referred to as the near side. In the description of the present application, the back side of the operation unit cover may be simply referred to as a cover back side, and the front side of the operation unit cover may be simply referred to as a cover front side.

本願請求項１の発明の操作部カバー構造で採用する操作部カバーは、操作ボックスの上面部の各操作手段の直上方の全面を被覆し得るものであればよい。又、この請求項１では、該操作部カバーとして一枚物の板材を使用したものであってもよいが、本願請求項２のように奥辺板と前辺板とに２分割したものでもよい。尚、操作部カバーの材質としては、透明材（例えば透明アクリル板）が好ましい。   The operation unit cover employed in the operation unit cover structure according to the first aspect of the present invention may be any as long as it can cover the entire surface of the upper surface of the operation box directly above each operation means. Moreover, in this claim 1, a single plate material may be used as the operation portion cover, but it may be divided into a back plate and a front plate as in claim 2 of this application. Good. In addition, as a material of an operation part cover, a transparent material (for example, a transparent acrylic board) is preferable.

そして、本願請求項１の発明の操作部カバー構造では、上記操作部カバーは次のように構成されている。   And in the operation part cover structure of invention of Claim 1 of this application, the said operation part cover is comprised as follows.

先ず、該操作部カバーは、操作ボックスの上面部に対してカバー奥辺部をヒンジで枢着してカバー前辺部が上下に弧回動し得る状態で設置している。   First, the operation unit cover is installed in a state where the back side of the cover is pivotally attached to the upper surface of the operation box by a hinge and the front side of the cover can be pivoted up and down.

又、該操作部カバーは、各操作手段の直上方を被覆する閉姿勢と、各操作手段の直上方を被覆する位置で且つカバー前辺部の下方に手を差し込んで各操作手段を操作し得る所定角度開放姿勢とに変位させ得るようにしている。   In addition, the operation unit cover is operated in such a manner that a closed posture covering the upper part of each operation unit and a position covering the upper part of each operation unit and a lower part of the front side of the cover are inserted. It can be displaced to an obtained predetermined angle opening posture.

さらに、該操作部カバーは、上記所定角度開放姿勢にした状態で操作部カバーを位置保持手段で位置保持させ得るようにしている。   Further, the operation unit cover can be held in position by the position holding unit in the state where the predetermined angle is opened.

操作部カバーが上記閉姿勢にあるときには、該操作部カバーが操作ボックス上面部の各操作手段にかなり近接した状態で被覆されていて、作業台内に居る作業員が操作部カバーの直下方にある各操作手段を操作できない状態となっている。   When the operation unit cover is in the closed position, the operation unit cover is covered in a state of being in close proximity to each operation means on the upper surface of the operation box, so that an operator on the work table is directly below the operation unit cover. Each operating means cannot be operated.

そして、該操作部カバーは、その閉姿勢からカバー前辺部を持ち上げると、カバー奥辺部のヒンジを中心にして上方に弧回動し、上記所定角度開放姿勢を経て各操作手段の上方を全面開放させる姿勢まで変化させ得るようになっている。   Then, when the front cover part of the operation unit cover is lifted from the closed position, the operation part cover is pivoted upward around the hinge at the back of the cover, and passes above the respective operation means through the predetermined angle opening position. It is possible to change the posture to fully open.

又、操作部カバーが上記所定角度開放姿勢にある状態では、カバー前辺部が閉位置から所定高さ（例えば５０〜１００mm程度の高さ）だけ上動していて、該カバー前辺部の下方に作業台内から作業員の手を差し入れ得るスペースが確保される。尚、操作部カバーを上記所定角度開放姿勢まで上方に弧回動させた状態では、操作部カバーが奥側に若干角度だけ下降傾斜するので、カバー前辺部が閉姿勢の状態より若干奥側に後退するが、その場合でも操作部カバーが操作ボックス上面部の各操作手段を全て被覆している。   In the state where the operation unit cover is in the predetermined angle open posture, the cover front side part moves upward by a predetermined height (for example, a height of about 50 to 100 mm) from the closed position. A space in which a worker's hand can be inserted from the work table is secured below. In the state where the operation unit cover is pivoted upward to the predetermined angle opening posture, the operation unit cover is inclined downward by a slight angle toward the back side, so that the front side of the cover is slightly behind the closed state. Even in this case, the operation unit cover covers all the operation means on the upper surface of the operation box.

又、操作部カバーが上記所定角度開放姿勢にある状態では、位置保持手段により操作部カバーを所定角度開放姿勢で位置保持させ得るようになっているが、この位置保持手段としては、例えば支持材を起伏自在に取付けたものを採用できる。そして、該支持材を倒伏姿勢にすることで操作部カバーを閉姿勢まで降下させることができる一方、該支持材を立起姿勢にすることで、操作部カバーを所定角度開放姿勢で支持できるようになっている。このように、操作部カバーを位置保持手段により所定角度開放姿勢で支持した状態では、該操作部カバーの姿勢が所定角度開放状態で安定している。   In addition, in a state where the operation unit cover is in the predetermined angle open posture, the position holding unit can hold the operation unit cover in a predetermined angle open posture. Can be used that can be raised and lowered freely. Then, the operation member cover can be lowered to the closed posture by setting the support material to the lying posture, and the operation member cover can be supported in a predetermined angle open posture by setting the support material to the standing posture. It has become. Thus, in a state where the operation unit cover is supported by the position holding means in a predetermined angle open posture, the posture of the operation unit cover is stable in the predetermined angle open state.

又、操作部カバーが上記所定角度開放姿勢にある状態では、作業台内に居る作業者がカバー前辺部の下方にできたスペースから手を差し入れて操作ボックス上の各操作手段を操作し得る（例えば操作レバーを手で握れる）ようになっている一方、カバー前辺部が若干奥側に後退するものの操作部カバーが各操作手段の直上方を被覆したままとなっている。   Further, in a state where the operation unit cover is in the predetermined angle open posture, an operator in the work table can operate each operation means on the operation box by inserting a hand from a space formed below the front side of the cover. (For example, the operation lever can be grasped with a hand), but the operation unit cover is still covered directly above each operation means, although the front side of the cover is slightly retracted to the back side.

ところで、本願の上記操作部カバー構造を備えたものであっても、通常時（非降雪時）の高所作業では操作部カバーを全開放させて操作ボックス上の各操作手段の上方を全面開放させて行う方が各操作手段への操作がし易いが、降雪中での高所作業では、操作部カバーを全開放させると操作ボックス上にも積雪してしまう。すると、その積雪で各操作手段の表示部（銘板）が雪で隠されて見えなくなったり（誤操作の原因になる）、極低温時には積雪部分が凍結して操作手段が動きにくくなる（操作しにくくなる）という問題が発生する。   By the way, even if the operation unit cover structure of the present application is provided, the operation unit cover is fully opened and the upper part of each operation means on the operation box is fully opened in high-altitude work during normal times (when it is not snowing). However, it is easier to operate each operation means. However, in high-altitude work during snowfall, if the operation unit cover is fully opened, snow will also accumulate on the operation box. Then, the display part (nameplate) of each operation means is hidden by snow and becomes invisible due to the snow (causes an erroneous operation), and the snow part freezes at extremely low temperatures, making the operation means difficult to move (hard to operate) Problem occurs.

そこで、本願発明の操作部カバー構造を備えたものでは、降雪中に高所作業を行う場合には、カバー前辺部を持ち上げて操作部カバーを上記所定角度開放姿勢まで開放し且つその所定角度開放姿勢で該操作部カバーを位置保持手段で支持させておく。この状態では、所定角度開放姿勢にある操作部カバーの前辺部の下方に、作業台内に居る作業員が手を差し入れることができる程度の高さのスペースが確保されており、該操作部カバーを所定角度開放姿勢に維持したままでも各種操作手段を操作できるようになっている。   Therefore, in the case where the operation part cover structure according to the present invention is provided, when working at a high place during snowfall, the cover front side part is lifted to open the operation part cover to the predetermined angle opening posture and the predetermined angle. The operation unit cover is supported by the position holding means in the open posture. In this state, a space high enough to allow a worker on the work table to insert his / her hand is secured below the front side of the operation unit cover in a predetermined angle open posture. Various operation means can be operated even when the part cover is maintained in a predetermined angle open posture.

他方、操作部カバーが所定角度開放姿勢にあるときには、操作部カバーが若干傾斜することによりカバー前辺部が閉姿勢のときより若干奥側に変位するものの、操作部カバーは各操作手段の直上方を被覆し得る位置にあるので、降雪時であっても操作ボックス上面部の各操作手段部分に積雪することはない。   On the other hand, when the operation unit cover is in the open posture at a predetermined angle, the operation unit cover is slightly inclined and the front side of the cover is slightly displaced from the closed position. Since it is in a position where the upper part can be covered, snow does not accumulate on each operation means portion on the upper surface of the operation box even during snowfall.

［本願請求項２の発明］
本願請求項２の発明は、上記請求項１の操作部カバー構造において、操作部カバーとして奥辺板と前辺板とに２分割したものを使用しているとともに、該奥辺板と前辺板をヒンジで枢着して前辺板を奥辺板に対して折畳み可能としていることを特徴としている。 [Invention of claim 2 of the present application]
The invention of claim 2 of the present application uses, in the operation unit cover structure of claim 1 above, a part divided into a back plate and a front plate as the operation unit cover, and the back plate and the front side. The board is pivotally attached by a hinge, and the front side board can be folded with respect to the back side board.

奥辺板と前辺板の各奥行幅の割合は適宜に設定できるが、後述する実施例では、特に限定するものではないが奥辺板４１が約３０〜３５％程度で前辺板４２が７０〜６５％程度に設定している。   The ratio of the depth width of the rear side plate and the front side plate can be set as appropriate. However, in the embodiment described later, the rear side plate 41 is about 30 to 35% and the front side plate 42 is not particularly limited. It is set to about 70 to 65%.

この請求項２の操作部カバー構造では、操作部カバーを上記所定角度開放姿勢にするときには、その奥辺板を手前側に所定角度（例えば角度３０°程度）上り傾斜させる一方、前辺板を略水平姿勢にした状態で位置保持手段で支持できる。又、操作部カバーを各操作手段の直上方から奥側に完全開放させるときには、奥辺板を奥側に最大弧回動させた状態で前辺板を略水平姿勢にすることで、該奥辺板と前辺板とを上下重合状態に折畳むことができる。   In the operation unit cover structure according to claim 2, when the operation unit cover is in the predetermined angle open posture, the rear side plate is inclined upward by a predetermined angle (for example, an angle of about 30 °) while the front side plate is It can be supported by the position holding means in a substantially horizontal position. In addition, when the operation unit cover is completely opened from directly above each operation means to the back side, the front side plate is placed in a substantially horizontal position with the back side plate being turned to the back side by the maximum arc. The side plate and the front side plate can be folded up and down.

［本願請求項３の発明］
本願請求項３の発明は、上記請求項２の操作部カバー構造において、位置保持手段として、操作部カバーを閉姿勢にし得る倒伏姿勢と該操作部カバーを所定角度開放姿勢で支持できる立起姿勢との間で変位可能な支持材を用いている。尚、この支持材は、比較的短小長さで直方体形状のものを採用でき、該支持材の長さ方向の適所を支軸で枢支することで上記倒伏姿勢（操作部カバーを閉姿勢にできる）と立起姿勢（操作部カバーを所定角度開放姿勢に支持できる）とに揺動させ得るものが採用できる。 [Invention of claim 3 of the present application]
The invention of claim 3 of the present application is the operation unit cover structure according to claim 2, wherein as the position holding means, the lying posture capable of closing the operation unit cover and the standing posture capable of supporting the operation unit cover in a predetermined angle open posture. Support material that can be displaced between the two is used. The support material may be a rectangular parallelepiped with a relatively short length, and the support material is pivotally supported by a support shaft in the longitudinal direction to support the above-mentioned lying posture (the operation unit cover is closed). That can be swung to a standing posture (the operation unit cover can be supported in an open posture at a predetermined angle).

又、この支持材は、立起姿勢において姿勢維持材（例えば衝合ピン）に衝合して姿勢保持されるようになっている。そして、この支持材が姿勢維持材により立起姿勢で姿勢保持された状態では、該支持材の上部側が上記支軸の直上方より若干作業台側（手前側）に位置していて、該支持材の上部がそれ以上作業台側（手前側）に傾動しないようになっている。   In addition, this support material is held in a standing posture by colliding with a posture maintaining material (for example, a collision pin). When the support material is held in the upright posture by the posture maintenance material, the upper side of the support material is located slightly on the work table side (front side) from directly above the support shaft, and the support material is The upper part of the material is prevented from tilting further to the workbench side (front side).

さらに、上記支持材には、操作部カバーを所定角度開放姿勢で支持した状態で、操作部カバーの前辺板の前部を下面側と前面側の両方から係止し得る係止受部を設けている。この係止受部としては、支持材における立起姿勢で上端部となる部分に鉤型（Ｌ型）の切欠を設けたものを採用できる。   Furthermore, the support member has a latch receiving portion that can latch the front portion of the front side plate of the operation portion cover from both the lower surface side and the front surface side in a state where the operation portion cover is supported in a predetermined angle open posture. Provided. As this latch receiving part, the thing which provided the notch (L type) notch in the part which becomes an upper end part in the standing posture in a support material is employable.

ところで、この請求項３（上記請求項２も同様）の操作部カバー構造では、操作部カバーとして奥辺板と前辺板とを折畳み可能にヒンジ結合したものを採用している関係で、操作部カバーを上記所定角度開放姿勢にした状態では、奥辺板が傾斜姿勢で前辺板が略水平姿勢になるので、両板が若干山折り形状に屈曲している。そして、操作部カバーを上記所定角度開放姿勢で支持する際に、立起姿勢にした上記支持材の上面に操作部カバーの前辺板の下面を単に載せただけでは、該前辺板の下面が支持材の上面に対して作業台側（手前側）に滑り得る状態となっている。   By the way, in the operation part cover structure of this claim 3 (the above-mentioned claim 2 is also the same), the operation part cover is constructed such that the rear side plate and the front side plate are hinged so as to be foldable. In the state in which the part cover is in the open posture at the predetermined angle, the back side plate is inclined and the front side plate is in a substantially horizontal position, so that both plates are slightly bent in a mountain fold shape. Then, when the operation unit cover is supported in the predetermined angle open posture, the lower surface of the front side plate is simply placed on the upper surface of the support member in the standing posture. Is slidable to the work table side (front side) with respect to the upper surface of the support member.

そこで、この請求項３では、支持材で所定角度開放姿勢にある操作部カバーの前辺板を支持した状態で、該支持材に操作部カバーの前辺板前部をその下面側と前面側の両方から係止受部で係止し得るようにしているが、このようにすると、操作部カバーの前辺板が下方及び手前側にそれぞれ移動することがない。   Therefore, in this third aspect, with the support member supporting the front side plate of the operation unit cover in an open posture at a predetermined angle, the front side plate front part of the operation unit cover is placed on the support material on the lower surface side and the front surface side. Although it can be locked by the locking receiving portion from both, if it does in this way, the front side plate of the operation portion cover will not move downward and near side, respectively.

［本願請求項１の発明の効果］
本願請求項１の発明の操作部カバー構造は、操作ボックス上の各操作手段を開閉し得る操作部カバーを上記所定角度開放姿勢にした状態で該操作部カバーを位置保持手段で位置保持させ得るようにしたものである。尚、操作部カバーが所定角度開放姿勢にある状態では、カバー前辺部の下方に作業台側から作業員の手を差し入れ得る程度の高さスペースが確保されている一方、操作部カバーが操作ボックス上の各操作手段の直上方を被覆し得る位置にある。 [Effect of the invention of claim 1 of the present application]
In the operation portion cover structure according to the first aspect of the present invention, the operation portion cover that can open and close each operation means on the operation box can be held in position by the position holding means in a state where the operation portion cover is opened at the predetermined angle. It is what I did. In the state where the operation unit cover is in the open posture at a predetermined angle, a height space is secured below the front side of the cover so that an operator's hand can be inserted from the work table side, while the operation unit cover is operated. It exists in the position which can coat | cover directly above each operation means on a box.

従って、この請求項１の発明の操作部カバー構造では、操作部カバーを上記所定角度開放姿勢で支持させておくことにより、降雪中での高所作業であっても、各操作手段への操作が可能であるとともに操作ボックス上面部（各操作手段）に積雪するのを防止できるという効果がある。   Therefore, in the operation portion cover structure according to the first aspect of the present invention, the operation portion cover is supported in the above-mentioned predetermined angle open posture so that the operation means can be operated even when working at a high place in snowfall. In addition, there is an effect that it is possible to prevent snow on the upper surface portion (each operation means) of the operation box.

［本願請求項２の発明の効果］
本願請求項２の発明の操作部カバー構造は、上記請求項１の操作部カバー構造において、操作部カバーとして奥辺板と前辺板とに２分割したものを使用しているとともに、該奥辺板と前辺板をヒンジで枢着して前辺板を奥辺板に対して折畳み可能としている。 [Effect of the invention of claim 2 of the present application]
The operation portion cover structure according to the second aspect of the present invention is the operation portion cover structure according to the first aspect, wherein the operation portion cover is divided into a rear side plate and a front side plate as the operation portion cover. The side plate and the front side plate are pivotally attached by a hinge so that the front side plate can be folded with respect to the back side plate.

従って、この請求項２の操作部カバー構造では、上記請求項１の効果に加えて、操作部カバーを全開放させるときに、奥辺板と前辺板とを２つ折りに重合させることができるので、操作部カバーの開放姿勢がコンパクトになる（奥行方向の幅を小さくできる）とう効果がある。   Therefore, in the operation portion cover structure according to the second aspect, in addition to the effect of the first aspect, when the operation portion cover is fully opened, the rear side plate and the front side plate can be folded in two. Therefore, there is an effect that the opening posture of the operation unit cover becomes compact (the width in the depth direction can be reduced).

［本願請求項３の発明の効果］
本願請求項３の発明の操作部カバー構造は、上記請求項２の操作部カバー構造において、操作部カバーを所定角度開放姿勢で支持するための位置保持手段として立起姿勢で姿勢保持される支持材を用いているとともに、該支持材に操作部カバーを所定角度開放姿勢で支持した状態で操作部カバーの前辺板の前部を下面側と前面側の両方から係止し得る係止受部を設けたものである。 [Effect of the invention of claim 3 of the present application]
The operation portion cover structure according to the third aspect of the present invention is the operation portion cover structure according to the second aspect, wherein the operation portion cover structure is supported in a standing posture as a position holding means for supporting the operation portion cover in a predetermined angle open posture. A locking receiver that can lock the front portion of the front side plate of the operation unit cover from both the lower surface side and the front surface side in a state where the operation unit cover is supported on the support material in a predetermined angle open posture. A part is provided.

そして、操作部カバーの所定角度開放姿勢で該操作部カバーの前辺板の前部を位置保持手段（支持材）の係止受部で支持した状態では、該前辺板が下方及び手前側に移動できないようになっている。   In the state where the front part of the front side plate of the operation part cover is supported by the latch receiving part of the position holding means (support material) with the operation part cover being opened at a predetermined angle, the front side plate is below and on the near side. Cannot be moved to.

従って、この請求項３の操作部カバー構造では、上記請求項２の効果に加えて、操作部カバーが奥辺板と前辺板からなる屈曲式（２つ折り形式）のものであっても、該操作部カバーを安定姿勢（前辺板の前部が下動及び手前側に移動しない状態）で保持できるという効果がある。   Therefore, in the operation part cover structure according to claim 3, in addition to the effect of claim 2, even if the operation part cover is a bending type (two-fold type) consisting of a rear side plate and a front side plate, There is an effect that the operation unit cover can be held in a stable posture (a state in which the front portion of the front side plate does not move downward and does not move forward).

本願実施例の操作部カバー構造を採用した高所作業車の上部構成図である。It is an upper part block diagram of the aerial work vehicle which employ | adopted the operation part cover structure of this-application Example. 図１の操作部カバー構造部分（操作部カバー閉姿勢状態）の拡大斜視図である。FIG. 2 is an enlarged perspective view of an operation unit cover structure portion (operation unit cover closed posture state) of FIG. 1. 図２のIII−III断面図である。FIG. 3 is a sectional view taken along line III-III in FIG. 2. 図３からの状態変化図で操作部カバーを所定角度開放姿勢にした説明図である。It is explanatory drawing which made the operation part cover into the predetermined angle open attitude | position by the state change figure from FIG. 図４からの状態変化図で操作部カバーを全開放させた状態の説明図である。FIG. 5 is an explanatory diagram of a state in which the operation unit cover is fully opened in the state change diagram from FIG. 4.

［実施例］
図１〜図５を参照して本願実施例の高所作業車における作業台の操作部カバー構造を説明する。 [Example]
With reference to FIGS. 1-5, the operation part cover structure of the work bench | platform in the aerial work vehicle of an Example of this application is demonstrated.

図１には、本願実施例の操作部カバー構造を採用した高所作業車の上部構成を示しているが、一般的に高所作業車は、車両（図示省略）上に旋回台（図示省略）を設け、該旋回台にブーム（伸縮ブーム）１を起伏自在に取付けているとともに、ブーム１の先端部１ａに支柱１１を介して作業員Ｍが搭乗する作業台２を取付けて構成している。   FIG. 1 shows an upper structure of an aerial work vehicle that employs the operation unit cover structure of the embodiment of the present invention. Generally, an aerial work vehicle is mounted on a swivel (not shown) on a vehicle (not shown). ), And a boom (extensible boom) 1 is attached to the swivel so that it can be raised and lowered, and a work table 2 on which a worker M is boarded is attached to the tip 1a of the boom 1 via a support column 11. Yes.

作業台２は、ブーム先端部１ａに対してレベリングシリンダ１２により常に水平姿勢を維持するうよに自動制御される。   The work table 2 is automatically controlled by the leveling cylinder 12 so as to always maintain a horizontal posture with respect to the boom tip 1a.

又、作業台２は、図示しない旋回装置により支柱１１に対して水平旋回させ得るようになっている。   Further, the work table 2 can be horizontally swiveled with respect to the column 11 by a swiveling device (not shown).

支柱１１の上部には、作業台２と供回りするカバー体１３が取付られている。このカバー体１３にはウインチ装置１４が装備されていて、該ウインチ装置１４で作業台２内に荷物を積み降ろしできるようになっている。   A cover body 13 is attached to the upper portion of the support 11 so as to go around with the work table 2. The cover body 13 is equipped with a winch device 14, and the winch device 14 can load and unload a load on the work table 2.

作業台２には、高所作業に関する各種操作を行う操作ボックス３が設けられている。尚、この操作ボックス３は、作業台２の上面部分における支柱１１側に取付けている。   The work table 2 is provided with an operation box 3 for performing various operations relating to work at a high place. The operation box 3 is attached to the support 11 on the upper surface portion of the work table 2.

操作ボックス３の上面部３ａには、各種操作（例えば、旋回台の旋回操作、ブームの起伏及び伸縮操作、作業台の首振り操作、ウインチ操作等）を行うための多数の操作手段６，６・・（図２参照）が設けられている。尚、各種操作手段６，６・・としては図２に示す各種操作レバーのほかに図示しない各種スイッチ類も含むものである。   A large number of operation means 6 and 6 for performing various operations (for example, turning operation of a turntable, raising and lowering and extending and retracting operations of a boom, swinging operation of a work table, winch operation) on the upper surface portion 3a of the operation box 3. .. (see FIG. 2) is provided. The various operation means 6, 6... Include various switches (not shown) in addition to the various operation levers shown in FIG.

各種操作手段６，６・・には、その近傍の操作ボックス上面部３ａ又は各レバー頭部にそれぞれの操作内容を表示する表示部（銘板等）が設けられていて、作業台２内の作業員（オペレーター）が操作すべき内容に応じて表示部を確認しながら適正な操作手段を選択し得るようになっている。   Each of the operation means 6, 6... Is provided with a display section (name plate or the like) for displaying the operation contents on the operation box upper surface 3 a or the head of each lever in the vicinity thereof. An operator can select an appropriate operation means while checking the display unit according to the contents to be operated.

ところで、操作ボックス３の上面部３ａが剥き出しのままであると、非作業時に操作ボックス上面部の各種操作手段６に他の物品が接触する（破損する）危険性があったり、長期不使用状態では操作ボックス上面部（各種操作手段）が埃等で汚れたりすることから、この種の高所作業車の中には操作ボックス上面部を操作部カバーで開閉自在に被覆したものがある。   By the way, if the upper surface portion 3a of the operation box 3 is left exposed, there is a risk that other articles may come into contact with (be damaged by) the various operation means 6 on the upper surface portion of the operation box during non-working, or a long-term non-use state. Then, since the upper surface portion (various operation means) of the operation box is soiled with dust or the like, some of these types of aerial work platforms have the operation box upper surface portion covered with an operation portion cover so as to be freely opened and closed.

本願発明も、操作ボックス３の上面部３ａを操作部カバー４で開閉自在に被覆したものを対象にしており、以下、本願実施例に係る高所作業車における作業台の操作部カバー構造Ａについて説明する。尚、本願で対象にしている操作部カバー構造は、後で詳述するように、操作部カバー４で各種操作手段６，６・・を保護（ガード）する機能や汚れ防止の機能のほかに、降雪中での高所作業時において、各種操作手段６，６・・の操作を可能にした状態であっても操作ボックス３の上面部３ａ（各操作手段）に積雪しないようにできるものである。     The present invention is also directed to a case where the upper surface portion 3a of the operation box 3 is covered with the operation portion cover 4 so as to be freely opened and closed. Hereinafter, the operation portion cover structure A for a work platform in an aerial work vehicle according to an embodiment of the present invention will be described. explain. The operation unit cover structure which is the subject of the present application is not only a function to protect (guard) various operation means 6, 6,... When working at high places during snowfall, it is possible to prevent snow accumulation on the upper surface portion 3a (each operation means) of the operation box 3 even when various operation means 6, 6,. is there.

この実施例の操作部カバー構造Ａは、図１に示すように作業台２の上面部における支柱１１側の端部に設けている。そして、この実施例の操作部カバー構造Ａは、図２〜図５に拡大図示するように、操作ボックス３の上面部３ａに設けた各種操作手段６，６・・の上方を操作部カバー４で開閉自在に被覆し得るようにしたものである。   As shown in FIG. 1, the operation unit cover structure A of this embodiment is provided at the end of the upper surface of the work table 2 on the column 11 side. And the operation part cover structure A of this Example is the operation part cover 4 above the various operation means 6,6 ... provided in the upper surface part 3a of the operation box 3, as enlargedly illustrated in FIGS. It can be opened and closed freely.

尚、以下の説明では、操作部カバー４において、カバー奥辺部４ａとは作業台２内から見て作業台外方側の辺部のことであり、カバー前辺部４ｂとは作業台２内から見て作業台内方側の辺部のことである。又、以下の説明においては、操作部カバー４の奥辺部４ａ側を奥側といい、操作部カバー４の前辺部４ｂ側を手前側といい、さらに操作部カバー４の前辺部４ｂから奥辺部４ａの方向を奥行方向ということがある。   In the following description, in the operation unit cover 4, the cover back side portion 4 a is a side portion on the outer side of the work table as viewed from the work table 2, and the cover front side portion 4 b is the work table 2. It is the side of the work table inward as viewed from the inside. In the following description, the back side 4a side of the operation unit cover 4 is referred to as the back side, the front side 4b side of the operation unit cover 4 is referred to as the front side, and the front side 4b of the operation unit cover 4 is further illustrated. The direction from the back to the back side 4a may be referred to as the depth direction.

この実施例で使用している操作部カバー４は、操作ボックス３の上面部３ａに設置している各操作手段６，６・・を全て被覆し得る面積を有した板状のものを採用している。又、該操作部カバー４は、この実施例では奥辺板４１と前辺板４２とに２分割したものを使用している。尚、操作部カバー４における奥辺板４１と前辺板４２の各奥行幅の割合は適宜に設定できるが、この実施例では奥辺板４１が約３０〜３５％程度で前辺板４２が７０〜６５％程度に設定している（この割合は特に限定するものではない）。   The operation unit cover 4 used in this embodiment employs a plate-like one having an area that can cover all the operation means 6, 6... Installed on the upper surface 3 a of the operation box 3. ing. Further, in this embodiment, the operation unit cover 4 is divided into a back side plate 41 and a front side plate 42. In addition, although the ratio of each depth width of the back side board 41 and the front side board 42 in the operation part cover 4 can be set suitably, in this Example, the back side board 41 is about 30 to 35%, and the front side board 42 is about 30%. It is set to about 70 to 65% (this ratio is not particularly limited).

操作部カバー４を構成する奥辺板４１と前辺板４２には、それぞれ透明板（例えば透明アクリル板）が使用されていて、作業員Ｍ（図１）が上方から奥辺板４１及び前辺板４２を通して操作ボックス上面部３ａの各種操作手段６，６・・を目視できるようになっている。   A transparent plate (for example, a transparent acrylic plate) is used for each of the back side plate 41 and the front side plate 42 that constitute the operation unit cover 4, and the worker M (FIG. 1) can view the back side plate 41 and the front plate from above. Various operating means 6, 6... On the operation box upper surface portion 3 a can be seen through the side plate 42.

そして、この実施例の操作部カバー構造Ａでは、操作部カバー４は次のように組付けられている。即ち、操作部カバー４の奥辺板４１の奥辺部（操作部カバー４全体の奥辺部４ａとなる）を操作ボックス３の奥端部に設けた枠フレーム３１の前辺部にヒンジ８，８で枢着している一方、該奥辺板４１の前辺部に前辺板４２の奥辺部をヒンジ９，９で枢着している。尚、枠フレーム３１の前辺部と奥辺板４１の奥辺部とを枢着しているヒンジ８，８は、両部材の上面側に取付けていて奥辺板４１が枠フレーム３１に対して上方に折曲（谷折り）できるようにしている一方、奥辺板４１の前辺部と前辺板４２の奥辺部とを枢着しているヒンジ９，９は、両部材の下面側に取付けていて前辺板４２が奥辺板４１に対して下方に折曲（山折り）できるようにしている。   And in the operation part cover structure A of this Example, the operation part cover 4 is assembled | attached as follows. In other words, the hinge 8 is provided at the front side of the frame frame 31 provided at the back end of the operation box 3 with the back side of the back plate 41 of the operation unit cover 4 (which becomes the back side 4a of the entire operation unit cover 4). , 8 is pivotally attached to the front side portion of the rear side plate 41, and the rear side portion of the front side plate 42 is pivotally attached by hinges 9, 9. The hinges 8 and 8 pivotally connecting the front side of the frame frame 31 and the back side of the back plate 41 are attached to the upper surface side of both members, and the back plate 41 is attached to the frame frame 31. The hinges 9 and 9 pivoting the front side portion of the rear side plate 41 and the rear side portion of the front side plate 42 are arranged on the lower surfaces of both members. It is attached to the side so that the front side plate 42 can be bent (folded) downward with respect to the back side plate 41.

操作部カバー４の前辺板４２における左側（作業台内から見ての左側）の側辺部には、後述の位置保持手段５に係合する脚板４３が下向きに突出する状態で取付けられている。この脚板４３は、奥行方向に向いた状態で適宜高さ（特に限定するものではないが例えば８〜１０cm程度）だけ下方に突出させたもので、該脚板４３の手前側下端部は直角状の角部４３ａとなっている。尚、この脚板４３は、本願請求項３における前辺板４２の前部に相当するものである。   A leg plate 43 that engages with a position holding means 5 to be described later is attached to the left side of the front side plate 42 of the operation unit cover 4 (left side as viewed from inside the work table) so as to protrude downward. Yes. The leg plate 43 is protruded downward by a suitable height (not particularly limited, for example, about 8 to 10 cm) while facing the depth direction, and the lower end portion on the near side of the leg plate 43 has a right-angled shape. It is a corner 43a. The leg plate 43 corresponds to the front portion of the front side plate 42 in claim 3 of the present application.

又、操作部カバー４の前辺板４２における右側（作業台内から見ての右側）の側辺部には、該操作部カバー４の閉姿勢時に操作ボックス３の右側外枠３４上に載置される脚板４４（図２）が取付けられている。尚、この右側の脚板４４は、操作部カバー４の閉姿勢時に前辺板４２の右側辺部を安定姿勢で支持するものである。   Further, the right side (right side as viewed from inside the work bench) of the front side plate 42 of the operation unit cover 4 is placed on the right outer frame 34 of the operation box 3 when the operation unit cover 4 is closed. A leg plate 44 (FIG. 2) to be placed is attached. The right leg plate 44 supports the right side portion of the front side plate 42 in a stable posture when the operation portion cover 4 is closed.

奥辺板４１と前辺板４２とを有した操作部カバー４は、図３に示す閉姿勢と、図４に示す所定角度開放姿勢と、図５に示す完全開放姿勢との３形態にそれぞれ変位させ得るようになっている。   The operation unit cover 4 having the rear side plate 41 and the front side plate 42 has three forms, a closed posture shown in FIG. 3, a predetermined angle open posture shown in FIG. 4, and a fully open posture shown in FIG. It can be displaced.

図３に示す操作部カバー４が閉姿勢にある状態は、奥辺板４１を枠フレーム３１に対して水平姿勢に維持している一方、前辺板４２も奥辺板４１に対して水平姿勢に維持している。そして、図３に示す操作部カバー４が閉姿勢にある状態では、該操作部カバー４が操作ボックス３上にある各操作手段６，６・・にかなり近接する位置で該各操作手段６，６・・の直上方を全て被覆している。尚、操作部カバー４が閉姿勢にある状態（図３）では、操作部カバー４の前辺部４ｂ下面と作業台２の前部上部枠２１上面との間の間隔Ｓがかなり狭くなっていて、この間隔Ｓ内に作業員の手を差し入れることができない（又は差し入れにくい）。   In the state where the operation unit cover 4 shown in FIG. 3 is in the closed posture, the rear side plate 41 is maintained in a horizontal posture with respect to the frame frame 31, while the front side plate 42 is also in a horizontal posture with respect to the rear side plate 41. To maintain. 3, the operation unit cover 4 is in a closed position, and the operation unit cover 4 is located at a position that is considerably close to the operation units 6, 6... On the operation box 3. All the upper part of 6 ... is covered. In the state where the operation unit cover 4 is in the closed position (FIG. 3), the interval S between the lower surface of the front side 4b of the operation unit cover 4 and the upper surface of the front upper frame 21 of the work table 2 is considerably narrow. Thus, the operator's hand cannot be inserted (or difficult to insert) within this interval S.

図４に示す操作部カバー４が所定角度開放姿勢にある状態は、奥辺板４１を枠フレーム３１に対して所定角度（例えば角度約３０°）上り傾斜させている一方、前辺板４２を奥辺板４１に対して水平姿勢に維持している。そして、図４に示す操作部カバー４が所定角度開放姿勢にある状態では、該操作部カバー４の前辺部４ｂが閉位置から所定高さ（例えば５０〜１００mm程度の高さ）だけ上動していて、該前辺部４ｂ下面と作業台２の前部上部枠２１上面との間にかなり広い間隔Ｌのスペースが確保される。この所定角度開放姿勢での上記間隔Ｌは、例えば１５０〜２００mm程度の高さがあって、作業台２内から作業員の手を差し入れることができる程度のものであり、該間隔Ｌを通して操作ボックス３上の全ての操作手段６，６・・を操作し得るようになっている。又、この所定角度開放姿勢（図４）では、奥辺板４１が所定角度（角度約３０°）傾斜していることにより、前辺板４２が水平姿勢であっても操作部カバー４の前辺部４ｂが閉姿勢（図３）の状態より若干奥側に後退するが、その場合でも操作部カバー４が操作ボックス上の各操作手段６，６・・を全て被覆する位置にある。 In the state where the operation unit cover 4 shown in FIG. 4 is in a predetermined angle open posture, the rear side plate 41 is inclined upward with respect to the frame frame 31 by a predetermined angle (for example, an angle of about 30 °), while the front side plate 42 is moved. The horizontal plate 41 is maintained in a horizontal posture. When the operation unit cover 4 shown in FIG. 4 is in a predetermined angle open posture, the front side portion 4b of the operation unit cover 4 is moved upward by a predetermined height (for example, a height of about 50 to 100 mm) from the closed position. Thus, a considerably wide space L is ensured between the lower surface of the front side 4b and the upper surface of the front upper frame 21 of the work table 2. The interval L in the predetermined angle open posture has a height of about 150 to 200 mm, for example, so that a worker's hand can be inserted from the work table 2. and it is able to operate all of the operations means 6,6 ... on the box 3. Further, in this predetermined angle open posture (FIG. 4), the rear side plate 41 is inclined at a predetermined angle (angle of about 30 °), so that the front side plate 42 is in front of the operation unit cover 4 even in the horizontal posture. The side portion 4b is slightly retracted from the closed posture (FIG. 3), but even in that case, the operation portion cover 4 is in a position covering all the operation means 6, 6,.

図５に示す操作部カバー４が完全開放姿勢にある状態では、奥辺板４１を枠フレーム３１上（衝合部材３２）に当接させるまで奥側に大きく開放させる一方、前辺板４２を奥辺板４１上に重合する状態で折畳んでいる。尚、この図５に示す操作部カバー４の完全開放姿勢では、各操作手段６，６・・の直上方の全面が開放されているので、通常の使用形態（操作部カバー４が邪魔にならない状態）で各種の高所作業操作が行える。   In the state in which the operation unit cover 4 shown in FIG. 5 is in the fully open posture, the rear side plate 41 is largely opened to the back side until it is brought into contact with the frame frame 31 (abutting member 32), while the front side plate 42 is opened. It is folded in a state of being superposed on the back plate 41. In the fully open position of the operation unit cover 4 shown in FIG. 5, since the entire surface immediately above each operation means 6, 6,... Is opened, the normal use mode (the operation unit cover 4 does not get in the way). Various high-altitude work operations can be performed in the state).

この実施例では、位置保持手段５により、操作部カバー４を図２及び図３に示す閉姿勢と図４に示す所定角度開放姿勢とでそれぞれ姿勢維持させるようにしているが、この位置保持手段５についての具体例を以下に説明する。   In this embodiment, the position holding unit 5 maintains the operation unit cover 4 in the closed position shown in FIGS. 2 and 3 and the predetermined angle open position shown in FIG. A specific example of 5 will be described below.

この実施例で使用している位置保持手段５は、図２〜図５に示すように比較的短小長さで直方体形状の支持材５１を使用している。そして、この支持材５１は、図２及び図３に示す奥行方向に向く横向き姿勢で該支持材５１の手前側端部から約１／３の長さ位置を支軸５４で操作ボックス３の縦壁面３３（図２）に枢支していることにより、該支持材５１を支軸５４を中心にして上下（図３に示す横向き姿勢と図４に示す立起姿勢）に揺動させ得るように設置している。   As shown in FIGS. 2 to 5, the position holding means 5 used in this embodiment uses a rectangular parallelepiped-shaped support material 51 having a relatively short and small length. The support member 51 is in a lateral orientation facing in the depth direction shown in FIGS. 2 and 3, and is about 1/3 in length from the front end of the support member 51. By pivotally supporting the wall surface 33 (FIG. 2), the support member 51 can be swung up and down (sideways posture shown in FIG. 3 and standing posture shown in FIG. 4) about the support shaft 54. It is installed in.

支持材５１は、図２及び図３に示す横向き姿勢において、該支持材５１の支軸５４より奥側位置の下面を姿勢維持材（衝合ピン）５６で支持している。又、この姿勢維持材（衝合ピン）５６は、図４に示すように支持材５１が立起姿勢にある状態で該支持材５１の後方傾動を禁止するストッパーとしての機能も有している。尚、支持材５１が立起姿勢（図５）にある状態では、該支持材５１の上部が支軸５４に直上方より手前側に位置しており、その状態で支持材５１下部の奥面に姿勢維持材（衝合ピン）５６を衝合させているので、該支持材５１が自重で変位することはない。   2 and 3, the support member 51 supports the lower surface of the support member 51 at a position deeper than the support shaft 54 with a posture maintaining member (abutting pin) 56. Further, the posture maintaining material (abutting pin) 56 also has a function as a stopper for prohibiting the backward tilting of the support material 51 in a state where the support material 51 is in the standing posture as shown in FIG. . In the state where the support material 51 is in the standing posture (FIG. 5), the upper portion of the support material 51 is located on the support shaft 54 from the upper side to the near side, and the back surface of the lower portion of the support material 51 in this state. Since the posture maintaining material (abutting pin) 56 is abutted with the support member 51, the support material 51 is not displaced by its own weight.

支持材５１が図４に示す横向き姿勢にある状態では、操作部カバー４を閉姿勢（奥辺板４１と前辺板４２とが共に水平姿勢）にした状態で前辺板４２の左側脚板４３の下面が横向き姿勢の支持材５１の上面に当接する（載置される）ようになっている。従って、支持材５１を横向き姿勢にすると、該支持材５１で操作部カバー４を閉姿勢に支持できるようになっている。   4, the left leg plate 43 of the front side plate 42 in a state where the operation unit cover 4 is in the closed posture (the rear side plate 41 and the front side plate 42 are both horizontal). Is in contact with (places on) the upper surface of the support material 51 in the lateral orientation. Therefore, when the support member 51 is in the horizontal posture, the operation member cover 4 can be supported in the closed posture by the support member 51.

又、支持材５１には、図４の立起姿勢で上端奥側となる部分に、操作部カバー４を所定角度開放姿勢で支持した状態で、操作部カバー４の前辺板４２の前部（この実施例では脚板４３の角部４３ａ）を下面側と前面側の両方から係止し得る係止受部５２を設けている。この係止受部５２は、支持材５１における立起姿勢で上端部となる部分に鉤型（Ｌ型）の切欠を設けたものを採用している。即ち、この係止受部５２には、前辺板４２の脚板４３の角部４３ａを下面側と手前側の両方から係止し得る部分がある。   Further, the support member 51 has a front portion of the front side plate 42 of the operation unit cover 4 in a state where the operation unit cover 4 is supported in a predetermined angle open posture at a portion on the back side of the upper end in the standing posture of FIG. In this embodiment, there is provided a locking receiving portion 52 that can lock the corner portion 43a of the leg plate 43 from both the lower surface side and the front surface side. The latch receiving portion 52 employs a hook-shaped (L-shaped) notch provided in the upper end portion of the support material 51 in the standing posture. That is, the latch receiving portion 52 includes a portion that can latch the corner portion 43a of the leg plate 43 of the front side plate 42 from both the lower surface side and the near side.

そして、図４に示すように、支持材５１を立起姿勢にした状態で、その上端部の係止受部５２に前辺板４２の脚板４３の角部４３ａを載せると、操作部カバー４が所定角度開放姿勢にある状態（前辺板４２が奥辺板４１に対して山折り状に屈曲していて、前辺板４２が手前側に押される作用を受けている）であっても該脚板４３が下面側及び手前側の両方に移動することがない。従って、操作部カバー４は所定角度開放姿勢において安定姿勢を維持している。   As shown in FIG. 4, when the corner portion 43 a of the leg plate 43 of the front side plate 42 is placed on the locking receiving portion 52 of the upper end portion in a state where the support member 51 is in the standing posture, the operation unit cover 4 Is in an open posture at a predetermined angle (the front side plate 42 is bent in a mountain-like manner with respect to the back side plate 41, and the front side plate 42 is subjected to the action of being pushed forward). The leg plate 43 does not move to both the lower surface side and the near side. Therefore, the operation unit cover 4 maintains a stable posture in a predetermined angle open posture.

この実施例の操作部カバー構造は、特に降雪中での高所作業時に効果を発揮するもので、降雪中での高所作業時には次のように使用される。   The operation portion cover structure of this embodiment is particularly effective when working at high places during snowfall, and is used as follows when working at high places during snowfall.

尚、操作ボックス３を高所作業に使用しない場合は、操作部カバー４を図３に示す閉姿勢にしておくが、この閉姿勢では操作部カバー４の前辺部４ｂと作業台２の前部上面２１との間の間隔Ｓが狭くて、この間隔Ｓ内に作業台２内に居る作業員の手を差し入れることができない。   When the operation box 3 is not used for high-altitude work, the operation unit cover 4 is kept in the closed position shown in FIG. 3, but in this closed position, the front side 4b of the operation unit cover 4 and the front of the work table 2 are placed. An interval S between the upper surface 21 and the part upper surface 21 is narrow, and the operator's hand in the work table 2 cannot be inserted into the interval S.

そして、降雪中に高所作業を行う場合は、図３の閉姿勢から操作部カバー４の前辺部４ｂを持ち上げて（開放させて）、横向き姿勢にある支持材５１を図４の姿勢まで立起させる。このとき、該支持材５１の上部が支軸５４の直上方を越えて手前側に傾動し且つ支持材５１の下部が姿勢維持材（衝合ピン）５６に衝合しているので、該支持材５１は立起姿勢で安定している。   Then, when working at a high place during snowfall, the front side portion 4b of the operation unit cover 4 is lifted (opened) from the closed posture of FIG. 3, and the support material 51 in the horizontal posture is brought to the posture of FIG. Raise. At this time, since the upper part of the support member 51 is tilted to the near side beyond just above the support shaft 54 and the lower part of the support member 51 is in contact with the posture maintaining member (abutment pin) 56, the support member 51 The material 51 is stable in a standing posture.

次に、持ち上げていた前辺板４２を降ろして、その脚板４３の手前側角部４３ａを立起姿勢にある支持材５１の係止受部５２に載せると、図４に示すように立起姿勢の支持材５１で操作部カバー４を所定角度開放姿勢で支持できる。   Next, when the front side plate 42 that has been lifted is lowered, and the front side corner portion 43a of the leg plate 43 is placed on the locking receiving portion 52 of the support member 51 in the standing posture, the upright side plate 43 rises as shown in FIG. The operation part cover 4 can be supported in a predetermined angle open posture by the support material 51 in the posture.

図４に示すように、操作部カバー４が所定角度開放姿勢にある状態では、奥辺板４１が傾斜していることにより、操作部カバー４の前辺部４ｂと作業台２の前部上面２１との間の間隔Ｌがかなり広くなっており、該間隔（スペース）Ｌから作業員の手を差し入れて操作ボックス３上の各種操作手段６，６・・を操作し得るようになっている。又、この所定角度開放姿勢では、奥辺板４１が傾斜していることにより操作部カバー４の前辺部４ｂが若干奥側に後退しているが、そのカバー前辺部４ｂの後退量は僅かであるので、該操作部カバー４が操作ボックス３上の各操作手段６，６・・の直上方を被覆している状態を維持している。   As shown in FIG. 4, in the state where the operation unit cover 4 is in the open posture at a predetermined angle, the rear side plate 41 is inclined so that the front side part 4 b of the operation unit cover 4 and the front upper surface of the work table 2 are inclined. The distance L between the control box 21 and the control box 3 is considerably wide, and the operator's hand can be inserted from the distance (space) L to operate the various operation means 6, 6. . Further, in this predetermined angle opening posture, the front side 4b of the operation unit cover 4 slightly recedes to the back side due to the inclination of the back side plate 41, but the receding amount of the cover front side 4b is as follows. Since the number of the operation unit covers 4 is small, the state in which the operation unit cover 4 covers the operation units 6, 6.

従って、操作部カバー４を所定角度開放姿勢（図４）にした状態で高所作業を行う場合は、降雪中であっても、雪が操作部カバー４にガードされて操作ボックス３上（各操作手段６，６・・がある）に積もることがなく、しかも操作部カバー４の前辺部４ｂの下面側から手を差し入れることで各操作手段６，６・・を操作できる（高所作業操作が行える）という機能がある。   Therefore, when working at a high place with the operation unit cover 4 in a predetermined angle open posture (FIG. 4), the snow is guarded by the operation unit cover 4 on the operation box 3 (each operation) even during snowfall. There is no means 6, 6, etc., and each operation means 6, 6... Can be operated by inserting a hand from the lower surface side of the front side 4 b of the operation part cover 4 (work at height) It can be operated).

尚、操作部カバー４を所定角度開放姿勢にした状態で作業中に降雪していると、雪が操作部カバー４上に積もる（透明板を通して各操作手段６，６・・が見えなくなる）が、操作部カバー４上に積もった雪はときどき手で払い落とせば透明の操作部カバー４（奥辺板４１と前辺板４２）を通して各操作手段６，６・・を視認できる。   In addition, if it is snowing during operation with the operation unit cover 4 in the open posture at a predetermined angle, the snow accumulates on the operation unit cover 4 (the operation means 6, 6... Cannot be seen through the transparent plate). If the snow piled up on the operation unit cover 4 is occasionally wiped out by hand, the operation means 6, 6... Can be visually recognized through the transparent operation unit cover 4 (the rear side plate 41 and the front side plate 42).

又、天候が降雪中以外の場合は、図５に示すように通常通り操作部カバー４を全開放状態で高所作業を行うとよい。このとき、操作部カバー４として奥辺板４１と前辺板４２とヒンジ９，９で折畳み自在に連結したものでは、図５に示す全開放状態で奥辺板４１と前辺板４２とを２つ折りに重合させることができるので、操作部カバー４の開放姿勢がコンパクトになる。   In addition, when the weather is not during snowing, it is preferable to perform the work at a high place with the operation unit cover 4 fully opened as shown in FIG. At this time, when the back cover 41, the front side plate 42, and the hinges 9 and 9 are foldably connected as the operation unit cover 4, the back side plate 41 and the front side plate 42 are connected in the fully opened state shown in FIG. Since it can superpose | polymerize in half, the open attitude | position of the operation part cover 4 becomes compact.

さらに、操作部カバー４を所定角度開放姿勢で支持するのに、支持材５１に上記係止受部５２を設けていると、操作部カバー４が奥辺板４１と前辺板４２からなる屈曲式（２つ折り形式）のものであっても、該操作部カバー４を安定姿勢（前辺板４２の前部が下動及び手前側に移動しない状態）で保持できる。   Further, when the operation member cover 4 is supported at a predetermined angle open posture and the support member 51 is provided with the locking receiving portion 52, the operation portion cover 4 is bent by the rear side plate 41 and the front side plate 42. Even if it is a thing of a formula (two-fold type), this operation part cover 4 can be hold | maintained in the stable attitude | position (The state which the front part of the front side board 42 does not move downward and a near side).

１はブーム、２は作業台、３は操作ボックス、３ａは上面部、４は操作部カバー、４ａは奥辺部、４ｂは前辺部、５は位置保持手段、６は操作手段、８はヒンジ、９はヒンジ、４１は奥辺板、４２は前辺板、４３は脚板、４１は支持材、５２は係止受部、５４は支軸、５６は姿勢維持材（衝合ピン）である。   1 is a boom, 2 is a work table, 3 is an operation box, 3a is an upper surface portion, 4 is an operation portion cover, 4a is a rear edge portion, 4b is a front edge portion, 5 is a position holding means, 6 is an operation means, and 8 Hinge, 9 is hinge, 41 is a back plate, 42 is a front plate, 43 is a leg plate, 41 is a support member, 52 is a lock receiving part, 54 is a support shaft, 56 is a posture maintenance material (abutment pin) is there.

Claims (3)

高所作業車の作業台に設けた操作ボックスの上面部に各種の操作を行う各操作手段を設け、さらに該各操作手段の上方を開閉自在な操作部カバーで被覆した高所作業車における作業台の操作部カバー構造であって、
上記操作部カバーは、上記操作ボックスの上面部に対してカバー奥辺部をヒンジで枢着してカバー前辺部が上下に弧回動し得る状態で設置している一方、
上記操作部カバーは、上記各操作手段の直上方を被覆する閉姿勢と、上記各操作手段の直上方を被覆する位置で且つ上記カバー前辺部の下方に手を差込んで上記各操作手段を操作し得る所定角度開放姿勢とに変位させ得るとともに、
上記操作部カバーを上記所定角度開放姿勢にした状態で該操作部カバーを位置保持手段で位置保持させ得るように構成している、
ことを特徴とする高所作業車における作業台の操作部カバー構造。 Working on an aerial work vehicle in which operation means for performing various operations are provided on the upper surface of an operation box provided on the work platform of the aerial work vehicle, and the upper part of each operation means is covered with an openable / closable operation part cover. The operation part cover structure of the stand,
While the operation unit cover is installed in a state where the back side of the cover is pivotally attached to the upper surface of the operation box with a hinge and the front side of the cover can be turned up and down,
The operation unit cover is in a closed position covering directly above the operation units, and a position covering the operation unit directly above and below the front side of the cover, and the operation units cover. And can be displaced to a predetermined angle open posture that can be operated,
The operation unit cover is configured to be able to be held by the position holding unit in a state where the operation unit cover is opened at the predetermined angle.
An operating unit cover structure for a work platform in an aerial work vehicle. 請求項１において、
操作部カバーは、奥辺板と前辺板とに２分割したものを使用しているとともに、
上記奥辺板と上記前辺板をヒンジで枢着して該前辺板を該奥辺板に対して折畳み可能としている、
ことを特徴とする高所作業車における作業台の操作部カバー構造。 In claim 1,
The operating unit cover is divided into a back plate and a front plate, and
The back side plate and the front side plate are pivotally attached to each other with a hinge so that the front side plate can be folded with respect to the back side plate.
An operating unit cover structure for a work platform in an aerial work vehicle. 請求項２において、
位置保持手段は、操作部カバーを閉姿勢にし得る倒伏姿勢と該操作部カバーを所定角度開放姿勢で支持できる立起姿勢との間で変位可能な支持材を用い、
該支持材は、立起姿勢において姿勢維持材に衝合して姿勢保持されるとともに、
上記支持材には、操作部カバーを所定角度開放姿勢で支持した状態で、該操作部カバーの前辺板の前部を下面側と前面側の両方から係止し得る係止受部を設けている、
ことを特徴とする高所作業車における作業台の操作部カバー構造。 In claim 2,
The position holding means uses a support material that is displaceable between a lying posture that can close the operation portion cover and a standing posture that can support the operation portion cover in a predetermined angle open posture,
The support material is held in a posture in contact with the posture maintenance material in the standing posture,
The support member is provided with a lock receiving portion that can lock the front portion of the front side plate of the operation portion cover from both the lower surface side and the front surface side in a state where the operation portion cover is supported in an open posture at a predetermined angle. ing,
An operating unit cover structure for a work platform in an aerial work vehicle.
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