JP4243522B2 - Aerial work platform - Google Patents

Description

  The present invention relates to an aerial work vehicle, and more particularly to an aerial work vehicle in which a work table is positioned at the rearmost end of a vehicle body when stored.

  For example, an aerial work vehicle that places an operator on a workbench to perform work at a high altitude includes, for example, a vehicle body that can travel, a swivel that is pivotably attached to the car body, and at least freely undulate on the swivel The attached lower boom, the upper boom attached to the tip of the lower boom so as to be swingable at least in the vertical direction, and the vertical post that is attached to the tip of the upper boom so as to be swingable in the vertical direction and is held vertically when working at a high place. And a work table that is pivotally mounted on a vertical post in a horizontal plane in a vertically held state.

In an aerial work vehicle having such a configuration, for example, the lower boom is laid down in the front direction of the vehicle body, the upper boom is laid down so as to overlap the upper part of the lower boom, and the workbench is turned to a position along the side surface of the base of the lower boom. A device that is stored on the vehicle body on the side of the swivel is known (see, for example, Patent Document 1). In addition, the lower boom is laid down in the front direction of the vehicle body, the upper boom is laid down so as to overlap the upper part of the lower boom, and the vertical post is swung downward from the tip of the upper boom until it becomes substantially vertical, and the workbench is placed on the vehicle body. What is stored is known (see, for example, Patent Document 2).
Japanese Patent Application Laid-Open No. 2000-219496 JP 2001-226099 A

  By the way, as shown in FIG. 13, in an aerial work vehicle in which the work platform is located at the rearmost end of the vehicle body during storage, the lower boom, the upper boom, the vertical post, and the work table are stored on the vehicle body so as not to protrude from the vehicle body. Requires a vehicle body having a total length c that is equal to or greater than the sum of the length a in the longitudinal direction of the lower boom, the upper boom and the vertical post in the retracted posture and the length b of the workbench in the longitudinal direction of the vehicle body. However, the total length c is defined in advance, and when the length a in the longitudinal direction of the lower boom, the upper boom, and the vertical post is to be secured, the work platform is made smaller (that is, the length b of the work floor in the longitudinal direction of the vehicle body is shortened). I have to. As a result, there arises a problem that the usability is lowered, for example, the work floor area is reduced and the load on the work table cannot be increased. Further, when trying to secure the size of the work platform, that is, the length b of the work floor in the longitudinal direction of the vehicle body, since the total length c is defined in advance as described above, the length of the lower boom, the upper boom and the vertical post in the longitudinal direction is determined. The length a must be shortened. As a result, there arises a problem that the working range at the time of working at a high place is narrowed and the working efficiency is lowered.

  Furthermore, in the above-mentioned high-altitude work vehicle, an operator gets on the driving cabin while the work table is stored on the vehicle body so that the vehicle travels, so that the center of gravity of the vehicle is kept as low as possible. There is a demand for improving running stability.

  The present invention has been made in view of such problems, compactly storing the work bench on the vehicle body, can sufficiently ensure the length of the lower boom, upper boom, vertical post and work floor area, And it aims at providing the aerial work vehicle which is excellent in the stability of a vehicle body.

In order to achieve such an object, an aerial work vehicle according to the first invention of the present application includes a swivel mounted on a vehicle body so as to be able to swivel, and a lower boom having a base end pivotally connected to the swivel and capable of moving up and down the undulations rotatably upper boom upwardly with respect to the lower boom proximal end to the distal end of the lower boom is pivotally is pivotally connected vertically swingably to a front end portion of the upper boom, from the tip portion of the upper boom A work table that is always positioned below and a leveling device that controls the work table to be in a horizontal state by swinging the work table up and down according to the raising and lowering movement of the lower boom and the upper boom. The lower boom is laid down to a position that extends horizontally toward the front of the vehicle body, and the upper boom is configured to overlap the lower boom and to be stored in the rear of the vehicle body. Protrudes to the rear side of the vehicle body from the base end of the lower boom and the swivel, and the work table is released from leveling control by the leveling device and is swung downward at a substantially right angle with respect to the tip of the upper boom , It is configured so as to be stored in the vehicle body below the upper boom from the protruding position and at the base end of the lower boom and the rear side of the swivel.

In order to achieve the above object, the aerial work vehicle according to the second invention of the present application is capable of swinging up and down with a swivel mounted on the vehicle body so as to be able to swivel and a base end pivotally connected to the swivel. A lower boom, an upper boom whose base end is pivotally connected to the distal end of the lower boom and can be moved up and down with respect to the lower boom, and a vertical post pivotally pivotable to the distal end of the upper boom, Leveling device that controls the vertical post to be in the vertical state by swinging the vertical post up and down according to the raising and lowering movement of the lower boom and the upper boom, and the work that is attached to the vertical post that is held in the vertical state so as to be able to turn horizontally With a stand. Then, the lower boom is collapsed to a position extending horizontally toward the front of the vehicle body, the upper boom is configured to be stored to extend rearward of the vehicle body with overlies the lower boom, workbench its floor vertical posts In the retracted state, the tip of the upper boom protrudes toward the rear of the vehicle body from the base end of the lower boom and the swivel, and the vertical post pivots to the upper boom. Is positioned between the swivel base and the rear end of the vehicle body, and the vertical post and the work platform are swung downward at a substantially right angle with respect to the tip of the upper boom by releasing the leveling control by the leveling device. constructed a from projecting rearward position below the upper boom to be stored is positioned on the rear side of the base end and the revolving base of the lower boom by That.

  In the second invention, the work table is preferably configured such that the floor surface thereof is slidable in a direction perpendicular to the axis of the vertical post.

  According to the aerial work vehicle of the first invention, when the work table is stored, a space (specifically, a space below the upper boom and the upper boom that is a gap formed between another work device and the vehicle body. Can be accommodated in a space located further forward). As a result, the work table can be stored compactly on the vehicle body without protruding backward from the vehicle body when the work device is stored. Furthermore, when storing, the boom can be extended to the limit of the range allowed as the work equipment mounting space, and thus the overall length of the vehicle can be reduced relative to the boom length.

  Also, in the first invention, the work bench is pivoted to the top end of the upper boom, the base end is pivoted, and can be swung in the vertical direction. The floor may be configured to be slidable in a direction perpendicular to the axis of the vertical post. By doing so, the center of gravity of the vehicle at the time of storage can be kept low to improve running stability, and a wider work range of the work table at the time of work can be secured.

  According to the second invention, the work table located at the rearmost end of the vehicle body can be stored compactly on the vehicle body during storage, and the length of the lower boom, the upper boom, the vertical post, and the work within the predetermined overall length. Sufficient table size can be secured. As a result, it is possible to provide an aerial work vehicle that is easy to use without reducing the work range and work floor area of the work at high places.

  In the second invention, the work table may be configured such that its floor surface is slidable in a direction perpendicular to the axis of the vertical post. By doing so, the center of gravity of the vehicle at the time of storage can be kept low to improve running stability, and a wider work range of the work table at the time of work can be secured.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. First, a first embodiment of the present invention will be described. 1 and 2 show a preferred embodiment of a boom type aerial work vehicle of the present invention. Specifically, an aerial work vehicle 20 is shown that has a work device 10 for aerial work that is composed of a swivel base 11, a lower boom 12, an upper boom 14, and a work table 16. The components 11, 12, 14, and 16 of the work apparatus 10 will be described. First, the swivel base 11 is attached to the vehicle body 20 so as to be rotatable in a horizontal plane, and when the work apparatus 10 is operated. The work table 16 is positioned by rotating the entire work device 10. The lower boom 12 is pivotally connected to the swivel base 11 and can move up and down relative to the swivel base 11. Further, the upper boom 14 is pivotally connected to the distal end of the lower boom 12, and can bend and extend with respect to the lower boom 12. The lower boom 12 and the upper boom 14 extend in opposite directions to each other and bend so as to be stacked when stored. In this aerial work platform 20, since the boom member is composed of two members in this way, the boom members 12 and 14 can be cooperated to be provided with a boom member that is significantly longer than the length of the vehicle body. As a result, it is possible to work at higher places.

  Further, the work table 16 is pivotally connected to the distal end portion of the upper boom 14, and can swing with respect to the upper boom 14 with the pivoted position as the rotation center 22. Since the work table 16 is used to mount workers when working at high places, it is necessary to always maintain (level) the horizontal state during work at high places. Therefore, the working device 10 includes not only the swivel base 11, the booms 12 and 14, and the work table 16 but also a predetermined leveling device (not shown) as its constituent elements. This leveling device has been conventionally used in aerial work vehicles, and may be electrically controlled or mechanically controlled. Specifically, the leveling device for electric control uses a position sensor or the like attached to the work table 16 to detect the tilt state of the work table 16 and swings the work table 16 until it becomes horizontal. It is. This swinging may be either hydraulic or electric. The leveling device for mechanical control is provided with a hydraulic cylinder that expands and contracts mainly in response to the raising and lowering movements of the booms 12 and 14, and a hydraulic cylinder that contracts and expands in reverse to the cylinders. 16 is swung. When this mechanical leveling device is employed, a leveling member is usually interposed between the upper boom 14 and the workbench 16, and the leveling member connected to the workbench is controlled by a cylinder so as to be kept in a horizontal state. The method is adopted. Note that the details of these leveling devices are general-purpose devices and are omitted here because they are not the essence of the present invention.

  Referring to FIG. 1, a state where the lower boom 12 and the upper boom 14 are not raised, that is, a state where the work table 16 is located at the lowest position during the operation of the work device 10 is shown. Specifically, the booms 12 and 14 are stored so as to overlap each other, and the work table 16 is in a leveled state. In this state, it can be seen that the position at which the work table 16 and the tip of the upper boom 14 are pivoted, that is, the rotation center 22 of the work table 16 that swings is above the work table 16.

  5A and 5B, if the rotation center 22 of the workbench 16 is configured to be positioned above the workbench 16 in this way, the liftability of the workbench 16 is improved. It turns out that it improves. This is because the rotation center 22 is arranged above the work table 16 as shown in FIG. 5B, compared to the case where the rotation center 22 is arranged below the work table 16 as shown in FIG. In this case, the lowermost position of the work table 16 reaches the lower position by the height L of the work table 16, and as a result, the ascending / descending range of the work table 16 is expanded by this height L.

  Here, the leveling of the work table 16 will be described for reference. The work table 16 includes a basket 26 on which workers are mounted, and a vertical post 24 that supports the basket 26 and has a role of connecting to the upper boom 14 (see FIGS. 1 and 5). Accordingly, the leveling of the work table 16 is achieved by holding the vertical posts 24 vertically, and as a result, the baskets 26 supported by the vertical posts 24 are held horizontally.

  Next, FIG. 2 shows a state where the work platform 16 of the aerial work vehicle 20 shown in FIG. 1 is stored. First, as described above, the aerial work vehicle 20 is operated while leveling the work table 16 on which the worker is mounted in order to ensure the safety of the worker when performing the work at the high place. That is, the work platform 16 is always leveled when the work platform 20 is capable of working at a high location, specifically, when the swivel base 11, the lower boom 12, and the upper boom 14 are operable. So that it is controlled. Therefore, even if the lower boom 12 and the upper boom 14 are stacked and stored, the work table 16 cannot be swung below the position shown in FIG. 1 if both the booms 12 and 14 are still operable.

  However, as shown in FIG. 1, in a state where the work table 16 protrudes rearward from the vehicle body 20, the vehicle body 20 is allowed to travel to another work point after working at a high place. It is easily understood that this is not acceptable from the viewpoint of avoiding danger. Therefore, it is necessary to move the work table 16 to a position closer to the vehicle body 20 than the position shown in FIG. Specifically, for example, after the booms 12 and 14 are laid down and the work table 16 reaches the position shown in FIG. 1, the work device 10 other than the work table 16 (that is, the swivel table 11 and the booms 12 and 14). The operation control circuit for working at high places is shut off so that the work table 16 is not operated, and the work table 16 is separately swung and stored by a drive source (not shown) provided for storage.

  How to store the work table 16 will be described below. First, the occupation space of the entire work apparatus 10 that can be mounted on the vehicle body 20 during storage is limited to a predetermined area. As described above, this is for running stability of the aerial work vehicle 20 and avoiding danger to the surrounding environment. In the aerial work vehicle 20 of FIG. 2, it is required to accommodate the work device 10 within X in the longitudinal direction of the vehicle body 20 and within Y in the height direction. Therefore, the work table 16 also needs to be accommodated in this range.

  Here, the storage of the work table 16 in the aerial work platform 20 in FIG. 2 will be described. The work table 16 rotates clockwise around the pivot position (rotation center 22) between the work table 16 and the upper boom 14. As a result, the upper boom 14 is positioned forward of the lower end of the upper boom 14 below the upper boom 14. The reason why the work table 16 is stored by being rotated around the pivot position (rotation center 22) is that the work table 16 is originally capable of rocking when working at a high place. This is because storing using the mechanism is easier and less costly than providing other storage means separately.

  In addition, the position below the upper boom 14 and ahead of the tip of the upper boom 14 is that the work table 16 can be stored at this position, and the uppermost of the entire working device 10 described above. This is because the rear part is the tip of the upper boom 14 and, as a result, the length of the upper boom 14 can be expanded to X, which is the permissible accommodation range in the longitudinal direction.

  In particular, the upper boom 14 includes an inner member and an outer member in which two hollow members are nested, although not shown, and has a function of expanding and contracting when the inner member slides with respect to the outer member. . Therefore, as described above, the length of the upper boom 14 in the retracted state (the state in which the inner member has entered most of the outer member) can be increased. This means that both can be made longer, and as a result, it is possible to mount the upper boom 14 capable of performing work at a higher distance in the vehicle body 20 to the vehicle body 20.

  Further, in the aerial work vehicle 20 shown in FIGS. 1 and 2, the rotation center 22 of the work table 16 is positioned above the work table 16 as schematically shown in FIG. The storage space in the longitudinal direction of the vehicle body 20 can be made smaller than when the rotation center 22 is positioned below the workbench 16 as schematically shown in FIG. More specifically, when the workbench 16 is rotated and stored, when the rotation center 22 of the workbench 16 shown in FIG. When the rotation center 22 of the workbench 16 shown in FIG. 3B is positioned above the workbench 16, the length of the workbench 16 is longer. The direction portion, that is, the bottom (= b) faces the upper boom 14. Therefore, since the work table 16 is usually shorter in the height portion (= a) than the bottom (= b), the work table 16 is operated more than the case where the rotation center 22 of the work table 16 is positioned below the work table 16. In the case of being positioned above the table 16, the work table storage space required below the upper boom 14 may be smaller. As a result, the aerial work vehicle 20 can increase the length of the lower boom 12 mounted on the vehicle body 20 and can perform a work at a high place at a point farther away.

  3 illustrates an example in which the position of the rotation center 22 of the work table 16 with respect to the upper boom 14 is located behind the work table 16, this is merely a typical example. However, it is not the purpose to exclude other embodiments in which the work table 16 is positioned below the rotation center 22 as described above. For example, as shown in FIG. 4, even when the rotation center 22 is positioned forward of the rear end of the workbench 16, the workbench 16 may be positioned below the upper boom 14.

  In the above description, if a configuration such as the work table 16 in the aerial work platform 20 is adopted, the upper boom 14 and the lower boom 12 are made the longest with respect to the body 20, particularly the mounting space of the work device 10. It turns out that you can.

  Next, when the boom length necessary for the aerial work vehicle 20 is determined, the length of the vehicle body 20 required for the aerial work vehicle 20, that is, the total length of the upper boom 14 and the lower boom 12. Considering the length of the vehicle body 20 that is necessary at the time, the viewpoint is shifted. As described above, the working vehicle 20 can make the working device 10, particularly the upper boom 14 and the lower boom 12, the longest with respect to the bodywork space having a predetermined length. Therefore, the space required for mounting the same working device 10 can be minimized. In other words, the aerial work platform 20 can provide the most compact vehicle body 20 with respect to the upper boom 14 and the lower boom 12.

  As described above, in the first embodiment, the storage of an aerial work vehicle composed of a swivel base, a lower boom, an upper boom, and a workbench has been described, but when the workbench is stored, What is necessary is just to make the structure stored in the clearance gap formed between the other work apparatus and the vehicle body by the rotation center located, and not only the aerial work vehicle described in this Embodiment but other Various aerial work platforms, for example, a work device comprising a swivel base, a boom that can move up and down, an arm that can bend and stretch with respect to the boom, and a work table that can swing with respect to the arm, etc. It can be easily understood that it can be applied in a work vehicle.

  As shown in FIGS. 6 and 7, the work table 16 includes a slide rail 17 a that is vertically attached to the vertical post 24 and a slide rail 17 a that is attached to the floor surface of the work table 16. The floor surface of the work table 16 includes a slide member 17b disposed so as to be slidable in a horizontal direction relative to the slide rail 17a (that is, in a direction perpendicular to the axis of the vertical post 24). May be. With such a configuration, after the worktable 16 is stored on the vehicle body 20 as described above, the worktable 16 is slid vertically downward (that is, from the position P indicated by the one-dot chain line in FIG. 6), The center of gravity of the vehicle during storage can be kept low, and driving stability can be improved. Further, during work, the work table 16 is slid in the horizontal direction (that is, the arrow Q from the position Q indicated by the one-dot chain line in FIG. 7), thereby expanding the movable range of the work table 16 and improving workability. be able to.

  As described above, the first embodiment has been described. However, the present invention is not limited to the above, and can be appropriately improved as long as it does not depart from the gist of the present invention.

  Next, a second embodiment will be described. As shown in FIG. 8, the aerial work vehicle 31 of the present invention has a driving cabin 33 a in front of a vehicle body 33, and front wheels 35 and rear wheels 37 in front, rear, left and right. Outrigger jacks 39 that can be expanded in the width direction of the vehicle body 33 and extendable in the vertical direction are provided at four locations on the front, rear, left, and right sides of the vehicle body 33. The vehicle body 33 is stably supported.

  At the center of the rear part of the vehicle body 33, there is provided a turntable 41 that protrudes upward through a subframe 33b attached on the vehicle body 33 and that can turn freely. The upper part of the swivel base 41 is telescopically mounted, and a lower boom 45 having a first telescopic cylinder 43 built therein is movably attached to the lower part of the lower boom 45 and the lower part of the swivel base 41. The first hoisting cylinder 47 is pivotally supported so as to be swingable. For this reason, the lower boom 45 is expanded / contracted by the expansion / contraction operation of the first expansion / contraction cylinder 43, and the lower boom 45 is operated by the expansion / contraction operation of the first undulation cylinder 47.

  An upper boom 51 that is nested and includes a second telescopic cylinder 49 is attached to the tip of the lower boom 45 so as to be swingable in the vertical direction. Further, first link members 53 that are swingable in the vertical direction are provided on the left and right side walls at the tip of the lower boom 45 and the left and right side walls at the base of the upper boom 51, respectively. They are swingably connected to each other. The bottom side of the second hoisting cylinder 55 is connected to both side walls of the upper boom 51 so as to be swingable in the vertical direction, and is connected to the tip of the first link member 53 to which the tip of the rod side is connected. Has been. For this reason, when the second hoisting cylinder 55 is expanded and contracted, the upper boom 51 moves up and down with respect to the lower boom 45.

  A vertical post 57 is attached to the tip of the upper boom 51 so as to be swingable in the vertical direction, and is always held vertically by a leveling mechanism (not shown) regardless of the operation of the lower boom 45 and the upper boom 51 during work at a high place. Leveling is controlled. Further, a swing cylinder 59 is built in the tip of the upper boom 51, and the tip on the rod side is swingably connected to the base of the vertical post 57 via the second link member 61 as shown in FIG. . By operating the swing cylinder 59 to extend and contract, the position of the work table 60 (attached to the tip of the upper boom 51 via the vertical post 57) can be adjusted in the vertical direction.

  The work table 60 is attached to a vertical post 57 that is held vertically during work at a high place so that the work table 60 can swivel (swing freely) in a horizontal plane, and the floor surface of the work table 60 operates the lower boom 45 and the upper boom 51. Regardless of this, it is always held horizontally with respect to the vertical post 57 when working at a high place. The work table 60 is provided with a first operating device 65 for operating the swivel base 41, the lower boom 45, the upper boom 51, the vertical post 57, and the like. A second operating device (not shown) having the same function is provided on the vehicle body 33 side.

  Further, as shown in FIG. 9, the work table 60 is positioned with respect to a horizontal plane including the lower surface of the upper boom 51 in the retracted state (inclined to a position extending substantially horizontally toward the rear of the vehicle body 33) (see FIG. 9). The vehicle turns and is stored on the vehicle body 33 until it is positioned below the position A). At this time (in a state where the work table 60 is stored on the vehicle body 33), the floor surface of the work table 60 is positioned in front of the vehicle body 33 (front of the position B shown in FIG. 9) rather than the tip of the upper boom 51. It is configured.

  The aerial work vehicle 31 having such a configuration is such that the lower boom 45 extends forward of the vehicle body 33 and falls on the vehicle body 33, and the upper boom 51 extends rearward of the vehicle body 33 and overlaps the upper side of the lower boom 45. Then, the vertical post 57 is swung to a position extending substantially horizontally rearward from the tip of the upper boom 51, and the work table 60 is stored on the vehicle body 33 so as to be positioned at the rearmost end of the vehicle body 33.

  Next, the operation of the aerial work vehicle 31 of the present invention will be described. First, as shown in FIG. 8, with the lower boom 45, the upper boom 51, the vertical post 57, and the worktable 60 stored in the vehicle body 33, the aerial work vehicle 31 is driven to the lower periphery of the desired high place. Move and stop. Then, the outrigger jack 9 is extended outward to stably support the vehicle body 33.

  Subsequently, the operator operates a second operating device (not shown) disposed on the vehicle body 33, and the vertical post 57 is substantially rearward from the tip of the upper boom 51 as shown in FIG. The swing cylinder 59 is extended from a horizontally extending position (position C shown in FIG. 10) to a substantially vertical position (position D shown in FIG. 10) so that the operator can get on the worktable 60.

  Then, the operator gets on the worktable 60 in this state, operates the first operating device 65 provided on the worktable 60, raises and lowers the lower boom 45, and swings the upper boom 51 upward. The work table 60 can be swung, the work table 60 can be swung with respect to the vertical post 57, and the work table 60 can be brought close to a desired height. At this time, the work table 60 is leveled and the floor surface of the work table 60 is always kept horizontal. Further, the operator can adjust the work position by swinging the work table 40 in the vertical direction by expanding and contracting the swing cylinder 59. When the work table 60 moves to a desired high place in this way, the worker performs the high place work.

  When the work is finished at a desired height, the worker on the work table 60 operates the first operation device 65 to swing the work table 60 with respect to the vertical post 57, thereby turning the turn table 41. , The lower boom 45 and the upper boom 51 are shortened, and the lower boom 45 and the upper boom 51 are moved above the vehicle body 33 and stopped. Then, the lower boom 45 is laid down so as to extend in front of the vehicle body 33, the upper boom 51 is laid down so as to extend rearward of the vehicle body 33 and overlap the upper side of the lower boom 45, and the work table 60 is positioned at the rear end of the vehicle body 33. Thus, the vehicle body 33 is stored.

  Subsequently, after an operator who has boarded the work table 60 gets off the work table 60, the second operating device (not shown) provided on the vehicle body 33 is operated, and the vertical post 57 (see FIG. 10). The swing cylinder 59 is contracted from a substantially vertical state (shown at position D) to a position extending substantially horizontally from the tip of the upper boom 51 (shown at position C in FIG. 10) to the rear. With respect to the vertical post 57 in the substantially horizontal state, the worker turns the work table 60 until it is positioned below (from position A shown in FIG. 9), and stores it on the vehicle body 33. At this time, in the work table 60, the floor surface of the work table 60 is positioned in front of the tip of the upper boom 51 (from the position B shown in FIG. 9).

  As shown in FIGS. 11 and 12, the work table 60 holds the slide rail 71a attached to the vertical post 57 vertically and the slide rail 71a attached to the floor surface of the work table 16. The work table 16 includes a slide member 71b that is slidably movable in a horizontal direction relative to the slide rail 71a (that is, in a direction perpendicular to the axis of the vertical post 57). May be. With such a configuration, after the work table 60 is stored on the vehicle body 33 as described above, the work table 60 is slid vertically downward (that is, from the position R indicated by the one-dot chain line in FIG. 11), The center of gravity of the vehicle during storage can be kept low, and driving stability can be improved. Further, during work, the worktable 60 is slid in the horizontal direction (that is, the arrow direction from the position S indicated by the one-dot chain line in FIG. 12), thereby expanding the movable range of the worktable 60 and improving workability. be able to.

  As described above, the second embodiment has been described. However, the present invention is not limited to the above, and can be appropriately improved as long as it does not depart from the gist of the present invention.

  For example, in the present embodiment, the upper boom 51 is attached to the tip of the lower boom 45 so as to be swingable in the vertical direction. It may be used for a so-called telescopic boom type aerial work vehicle including a boom.

It is the figure which showed the state in which work apparatuses other than a work stand were stored in the aerial work vehicle which is 1st Embodiment based on this invention. It is the figure which showed the state in which the work platform of the aerial work vehicle shown in FIG. 1 was stored. (A) is a schematic diagram showing before and after storage of a work table having a rotation center on the lower side, and (B) is a schematic diagram showing before and after storage of a work table having a rotation center on the upper side. It is a modification of embodiment shown to FIG. 3 (B). It is the schematic which shows the positional relationship in the state in which the work table which has a rotation center below, and the work table which has a rotation center above are each leveled, and the other work apparatus was stored. It is a figure which shows the example which improved about the structure of the work bench | platform in the aerial work vehicle which is 1st Embodiment which concerns on this invention. It is a figure which shows the example which improved about the structure of the work bench | platform in the aerial work vehicle which is 1st Embodiment which concerns on this invention. It is a figure which shows preferable embodiment of the aerial work vehicle in 2nd Embodiment which concerns on this invention. It is a figure which shows the attitude | position state of the worktable at the time of storage in the aerial work vehicle in 2nd Embodiment which concerns on this invention. It is a figure which shows the attitude | position state of the work bench | platform at the time of work in the aerial work vehicle in 2nd Embodiment which concerns on this invention. It is a figure which shows the example which gave improvement about the structure of the work bench | platform in the aerial work vehicle which is 2nd Embodiment based on this invention. It is a figure which shows the example which gave improvement about the structure of the work bench | platform in the aerial work vehicle which is 2nd Embodiment based on this invention. It is a figure which shows the conventional embodiment of the aerial work vehicle which concerns on this invention.

Explanation of symbols

10 Working device (first embodiment)
11 swivel (first embodiment)
12 Lower boom (first embodiment)
14 Upper boom (first embodiment)
16 Working table (first embodiment)
17a slide rail (first embodiment)
17b Slide member (first embodiment)
20 aerial work platform (body) (first embodiment)
22 Center of rotation (first embodiment)
24 vertical posts (first embodiment)
31 aerial work platform (second embodiment)
33 body (second embodiment)
41 swivel (second embodiment)
45 Lower boom (second embodiment)
51 Upper boom (second embodiment)
57 Vertical post (second embodiment)
60 workbench (second embodiment)
71a slide rail (second embodiment)
71b Slide member (second embodiment)

Claims (2)

A swivel mounted on the vehicle body so as to be able to swivel, a lower boom pivotable by a base end pivotally connected to the swivel, and a base end pivoted to a distal end of the lower boom. An upper boom that can move up and down, a workbench pivotably connected to the tip of the upper boom so as to be vertically swingable, and always positioned below the tip of the upper boom; and An aerial work vehicle comprising a leveling device that swings up and down according to the up and down movement of the upper boom and controls the work table so as to be in a horizontal state,
The lower boom is laid down to a position that extends horizontally toward the front of the vehicle body, and the upper boom is configured to overlap the lower boom and extend to the rear of the vehicle body for storage.
In the retracted state, the distal end portion of the upper boom projects rearward from the base end portion of the lower boom and the swivel, and
The working platform is released from the leveling control by the leveling device and is swung downward at a substantially right angle with respect to the tip of the upper boom, and is below the upper boom from a position protruding rearward of the vehicle body. An aerial work vehicle characterized by being configured to be stored in the vehicle body at a base end of a lower boom and a rear side of the swivel. A swivel mounted on the vehicle body so as to be able to swivel, a lower boom pivotable by a base end pivotally connected to the swivel, and a base end pivoted to a distal end of the lower boom. An upper boom that can move up and down, a vertical post that is pivotably pivoted to the tip of the upper boom, and a vertical post that swings up and down according to the up and down movement of the lower boom and the upper boom An aerial work vehicle comprising: a leveling device that controls the vertical post to be in a vertical state; and a workbench that is attached to the vertical post that is held in a vertical state so as to be horizontally pivotable.
The lower boom is laid down to a position that extends horizontally toward the front of the vehicle body, and the upper boom is configured to overlap the lower boom and extend to the rear of the vehicle body for storage.
The work table is configured such that its floor surface is slidable in a direction perpendicular to the axis of the vertical post,
In the retracted state, the distal end portion of the upper boom protrudes toward the rear of the vehicle body from the proximal end portion of the lower boom and the swivel, and the pivotal portion of the vertical post to the upper boom is located behind the swivel and the vehicle body. Located between the ends,
The vertical post and the workbench are released from leveling control by the leveling device and are swung downward at a substantially right angle with respect to the tip of the upper boom, and are positioned below the upper boom from a position protruding rearward of the vehicle body. An aerial work vehicle characterized by being configured to be stored at a base end of the lower boom and a rear side of the swivel.

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