JP6071403B2 - Aerial work platform - Google Patents

Description

  The present invention relates to an aerial work vehicle that includes a boom that can freely move up and down on a vehicle that can travel, and is configured to move a work table to a desired height by operating the boom to perform work at a high place.

  As an example of such an aerial work vehicle, a swivel base is installed on a loading platform provided at the rear part of the vehicle so that the swivel can move freely. There is known one constructed by attaching a workbench to the tip of the head. In this aerial work platform, the work platform can be moved over a relatively wide range by turning the swivel base and extending and retracting the boom, so that the cables can be routed between the power poles and the cables It is widely used for installation work and construction work of aerial cables that are drawn into the house.

For example, various equipment and work tools are required for installing the overhead cable. Thus, there is a type of such an aerial work vehicle configured to store and transport various equipment, work tools, and the like using the space on the loading platform. For example, in FIG. 3 of Patent Document 1, a front-end bending type boom composed of a hoisting boom, a bending boom, and a telescopic boom is provided at the front and rear center part of the vehicle, and a large size having substantially the same dimensions as the vehicle width at the rear part of the vehicle. An aerial work vehicle constructed by providing a cargo room is disclosed.

JP 2002-80192 A

By the way, in the aerial work vehicle which provided the luggage compartment in the rear part of the vehicle like patent document 1, the structure by which the capacity | capacitance of the cargo compartment was ensured was ensured, ensuring the movable range of a worktable. Here, in the aerial work vehicle described in Patent Document 1, since the telescopic boom that can be expanded and contracted is attached to the distal end portion of the bending and stretching boom, the telescopic boom can be expanded and contracted without adopting the bending and stretching boom that is long in the axial direction. The movable range of the work table can be secured by the movement. On the other hand, as shown by a broken line in FIG. 10, a tip bending type boom (reference numeral 50T in the drawing) composed of a hoisting boom and a bending boom, that is, a type in which a telescopic boom is not provided at the tip of the bending boom. In the case of adopting the tip bending type boom, in order to secure the movable range of the workbench, for example, it is conceivable to configure the aerial work vehicle using a bending boom that is formed longer in the axial direction. However, when a bending boom that is long in the axial direction is used, the tip of the bending boom is positioned rearward of the swivel base during storage by the length that is long in the axial direction, and the space in the luggage compartment is easily compressed. It is difficult to secure capacity. As described above, there is a problem that it is difficult to secure a space for storing various equipment, work tools, and the like on the loading platform of the vehicle while securing the movable range of the work platform.

  The present invention has been made in view of such a problem, and a space for storing various equipments, work tools, and the like on the cargo bed of the vehicle has been secured while securing a movable range of the work table. The purpose is to provide an aerial work vehicle.

  In order to achieve such an object, an aerial work vehicle according to the present invention includes a driver's cab (for example, the driving cab 12 in the embodiment) in the front portion and a loading platform (for example, a chassis in the embodiment) behind the driver's cab. 10, a vehicle equipped with a bodywork part 13), a swivel that is located in the vicinity of the rear of the operator's cab and can be swung horizontally on the cargo bed, and a base end is an upper part of the swivel A boom (for example, the tip-bend-extendable boom 50 in the embodiment) that is pivotally connected to the boom and is provided at the tip of the boom and is moved by the operation of the swivel base and the boom. The boom has a base end portion pivotally connected to the upper portion of the swivel base, and a boom boom that can freely move up and down, and a base end portion that is arranged side by side on the side of the hoisting boom. Pivot to the tip of the boom A bending boom that can be flexed and extended with respect to the hoisting boom, and the bending boom extends and extends linearly from the base end of the hoisting boom. A boom base end side, and a bent boom distal end side part integrally connected to a distal end part of the bent boom proximal end side part and bent downward and extending downward, are formed in a substantially L shape, A rear storage portion (for example, work in the embodiment) provided at the distal end portion of the bending boom distal end portion and positioned on the side of the distal end portion and disposed on the cargo bed at the rear of the swivel base. A tool storage section 14) is provided.

  In the above-described aerial work platform, the hoisting boom is stored in a state of extending substantially horizontally and forward above the operator cab, and the bending boom extends in a manner that the bending boom base end side is aligned with the hoisting boom. The upper part of the operator's cab extends substantially horizontally, and the retractable boom tip side is located at the rear of the operator's cab and extends downward. The structure stored in the side of a part is preferable.

  And a bending / extending cylinder that bends / extends the bending / extending boom with respect to the hoisting boom, and the bending / extending cylinder is disposed between the hoisting boom and the bending / extending boom proximal end side in a plan view. It is preferable that a part is pivotally connected to the hoisting boom and the other end is pivotally connected to the bent boom base end side, and the boom is retracted and positioned on the side of the hoisting boom.

Further, the bending / extending cylinder is configured to extend / contract when receiving hydraulic pressure, and has a holding valve for holding the expansion / contraction operating position of the bending / extending cylinder , and the holding valve is configured to support the hoisting boom and the bending / extending in a plan view. A configuration in which the boom is stored and located on the side of the hoisting boom when the boom is stored is preferable.

  In addition, the structure provided with the side storage part (for example, the ladder storage part 21 in embodiment) provided extending in the front-back direction on the said loading platform on the opposite side to the said work bench on both sides of the said bending-bending front-end | tip side part. preferable.

  In an aerial work platform according to the present invention, a bending boom with a workbench provided at a distal end thereof is bent downward and connected to a bending boom proximal end side extending linearly and a distal end of the bending boom proximal end side. It has a bending-extending boom extending side and extending substantially in an L shape. For this reason, for example, compared with the configuration in which the work table is provided at the front end of the bending boom that extends in a straight line, the bending boom (the front and rear sides of the bending boom) and the work can be performed while ensuring the movable range of the work table in the upward direction. The stand can be stored without being positioned rearward with respect to the swivel, and a space for storing a work tool or the like on the loading platform behind the swivel can be secured.

  In the above-described aerial work platform, the bending boom is stored with the bending boom tip side located behind the cab and extending downward, and the work table is located on the side of the swivel stand and the bending boom tip side. The structure stored in the position is preferable. With this configuration, the bending boom tip side can be positioned in the dead space behind the cab so that the bending boom can be stored in a space-efficient manner, and the work table can be positioned in the space on the side of the swivel base. The worktable can be stored in a space efficient manner.

  In addition, it is preferable that the bending / extending cylinder is disposed between the hoisting boom and the bending boom base end side portion in a plan view and is located on the side of the hoisting boom when the boom is stored. According to this configuration, it is possible to avoid the bending cylinder from being positioned above the hoisting boom (bending / extending boom) in the retracted state. Compared with the structure located in, the vehicle height of the aerial work vehicle in the retracted state can be suppressed.

  Further, it is preferable that the holding valve is disposed between the hoisting boom and the bending boom in a plan view, and is located on the side of the hoisting boom in a state where the boom is stored. According to this configuration, since it is possible to avoid the holding valve from being positioned above the hoisting boom (bending / extending boom) in the retracted state, for example, the holding valve is provided on the upper part of the cylinder tube of the bending / extending cylinder and As compared with the configuration located above, the vehicle height of the aerial work vehicle in the retracted state can be suppressed.

  In addition, the structure provided with the side storage part extended in the front-back direction on the loading platform on the opposite side to a work bench on both sides of the bending | extension boom extension side part is preferable. For example, when performing an installation work in which a cable is pulled from a utility pole to a house using an aerial work vehicle, it may be difficult to get the aerial work vehicle into the site of the house. In such a case, an aerial work vehicle is parked outside the site, and installation work is performed on the site using a ladder. For this reason, as with various equipment and work tools, an aerial work vehicle that is configured such that the ladder can be stored and transported on the loading platform is desired. Therefore, an easy-to-use high-altitude work vehicle can be realized by providing a side storage part capable of storing the ladder in the dead space on the loading platform opposite to the work platform.

The perspective view which looked at the aerial work vehicle to which this invention is applied from diagonally left rear is shown. The perspective view which looked at the aerial work vehicle to which this invention is applied from diagonally right rear is shown. It is a figure which shows the said aerial work vehicle, Comprising: (a) shows a top view, (b) shows a left view, respectively. It is the figure which looked at the manual jack from the side. It is a perspective view which shows the internal structure of a turntable, and the assembly structure of a turntable. It is a perspective view which shows a bending boom and a workbench. It is a perspective view which shows a work table. It is a block diagram which shows the control structure of the said aerial work vehicle. (A) is a top view which shows the movable range of a worktable, (b) is a left view which shows the movable range of a worktable. It is a left view for demonstrating that the storing position of a worktable differs by the conventional structure and this invention. The perspective view which looked at the aerial work vehicle which concerns on another embodiment from diagonally left rear is shown. The perspective view which looked at the aerial work vehicle which concerns on another embodiment from diagonally right back is shown. It is a figure which shows the aerial work vehicle which concerns on another embodiment, Comprising: (a) shows a top view, (b) shows the left view, respectively.

  Embodiments of the present invention will be described below with reference to the drawings. 1 to 8 show an aerial work vehicle 1 as an example to which the present invention is applied. First, the overall configuration of the aerial work vehicle 1 will be outlined with reference to these drawings. In the following description, for convenience of explanation, the left and right, front and rear, and up and down directions are defined in the directions of arrows attached to each drawing.

  FIGS. 1 and 2 show a state in which the aerial work vehicle 1 is viewed obliquely from the rear. As shown in FIGS. 1 and 2, the aerial work vehicle 1 includes tire wheels 11 on the front, rear, left and right. A truck vehicle (hereinafter referred to as “vehicle”) capable of traveling driving operation from the driving cab 12 is provided. The aerial work vehicle 1 includes a chassis 10 (see FIG. 3B) extending in the front-rear direction at the lower part of the vehicle, a mounting part 13 (see FIG. 3B) provided on the chassis 10, and a mounting part 13 A swivel base 40 provided on the top, a tip bending type boom 50 whose base end portion is pivotally coupled to the swivel base 40 and swingable up and down, and a work table provided at a tip part of the tip bending type boom 50 70 and a control unit 90 (see FIG. 8) for controlling the operation of the aerial work vehicle 1. In the driving cab 12, a steering wheel (not shown) for steering the tire wheel 11 and an accelerator pedal 12a (see FIGS. 2 and 8) that can be depressed are provided.

  The bodywork part 13 is provided on the chassis 10 behind the operation cab 12 and is configured by attaching various bodywork devices. Specifically, the work tool storage unit 14 formed in a box shape, the lower operation device 20 for operating the swivel base 40, the tip bending type boom 50, and the like, and the ladder storage for storing and holding the long ladder 2 are provided. Part 21, lifting step 22 used as a scaffold when an operator gets on or off worktable 70, hydraulic jack 23 that lifts and supports the vehicle, and manual jack 24 that grounds and suppresses the inclination of the vehicle Is configured.

  The work tool storage portion 14 is formed in a box shape having a storage space inside, and a main body portion 15 having a main body opening (not shown) communicating with the storage space at the rear portion and a pair of left and right hinges 17. An opening / closing door 16 which is attached to the main body 15 so as to cover the main body opening, has a puller 18 at the lower part and can swing up and down, and a roof rail 19 attached to the upper part of the main body 15 in a pair of left and right. Prepare. The work tool storage unit 14 is provided on the mounting unit 13 so as to be positioned on the right side of the rear part of the vehicle (see FIG. 3A), and by holding the pull handle 18 and pulling the open / close door 16 backward, An internal storage space can be accessed from behind the aerial work vehicle 1.

  The lower operation device 20 is provided adjacent to the left side of the work tool storage unit 14 and performs a turning operation of the swivel base 40, a undulation and bending operation of the tip bending type boom 50, and an extension and reduction operation of the hydraulic jack 23. It is configured to be able to. The lower operation device 20 is provided on the bodywork 13 so as to be positioned at the rear of the vehicle (see FIG. 3A), and performs a turning operation of the turntable 40 from the rear of the aerial work vehicle 1. Can be done.

  As shown in FIG. 1 and FIG. 3A, the ladder storage unit 21 is provided adjacent to the left side of the lower operating device 20, and is formed in a groove shape extending in the front-rear direction so that the ladder 2 is directed in the front-rear direction. It can be stored and held in the state. The ladder storage unit 21 is provided on the mounting unit 13 so as to be positioned on the left side of the rear part of the vehicle (see FIGS. 3A and 3B). For example, the ladder storage unit 21 is stored from the rear of the aerial work vehicle 1. The ladder 2 stored in the section 21 can be taken out, and the ladder 2 can be stored in the ladder storage section 21.

  As shown in FIG. 2, the ascending / descending step 22 is composed of three-stage scaffolds that are vertically connected, and is provided below the work table 70. The operator can smoothly get on and off the work table 70 by using the elevating step 22. The raising / lowering step 22 is provided on the bodywork part 13 so that it may be located in the right side part of a vehicle (refer Fig.3 (a)). 70 is accessible.

  As shown in FIGS. 1 and 2, the hydraulic jack 23 is provided as a pair of left and right behind the operation cab 12, and is configured to extend downward or reduce upward when receiving hydraulic pressure. . The hydraulic jack 23 is provided on the mounting part 13 so as to be positioned at the left and right ends of the vehicle (see FIG. 3A), and by lifting the hydraulic jack 23, the vehicle is lifted and stably supported. Can do.

  FIG. 4 is a side view of the manual jack 24. As shown in FIG. 4, the manual jack 24 includes an outer jack 25 attached to the body part 13 and an upper and lower portions of the outer jack 25. It is comprised from the inner jack 26 provided so that protrusion was possible. A holding pin insertion hole 25 a penetrating in the horizontal direction is formed in the lower portion of the outer jack 25. The inner jack 26 is configured with a grounding plate 27 at the lower end, an extension hole 28a penetrating in the horizontal direction is formed in the upper part, and a storage hole 28b penetrating in the horizontal direction is formed in the lower part. . When an operator rides on the work table 70 to work at a high place, the inner jack 26 protrudes downward from the outer jack 25, and the holding pin insertion hole 25a of the outer jack 25 and the extension hole 28a of the inner jack 26 are extended. The holding pins 29 are inserted into the holes 25a and 28a. In this way, as shown in FIG. 4, the grounding plate 27 of the inner jack 26 can be held at the extended position where it is grounded, and the tilt of the vehicle to the left and right and to the rear can be suppressed. When the aerial work vehicle 1 is driven, the inner jack 26 is stored in the outer jack 25 and the positions of the holding pin insertion hole 25a of the outer jack 25 and the storage hole 28b of the inner jack 26 are aligned. The holding pin 29 is inserted into the holes 25a and 28b. Thereby, as shown by a two-dot chain line in FIG. 4, the grounding plate 27 of the inner jack 26 can be held at the retracted position raised from the ground.

  FIG. 5 shows the internal structure of the swivel base 40. As can be seen from FIG. 5, the swivel base 40 is formed to extend vertically, and is provided with a worm wheel 41 that can rotate about the vertical axis at the bottom. . In addition, a hydraulic hoisting cylinder 42 is disposed inside the swivel base 40 so as to extend vertically. The swivel base 40 is mounted on the mounting portion 13 behind the driving cab 12, and a worm wheel 41 provided at the lower portion meshes with a worm 39 attached to an output shaft of a hydraulic swivel motor 38. For this reason, by rotating the turning motor 38, the turntable 40 can be turned horizontally around the vertical axis. As shown in FIG. 3 (a), the swivel base 40 is mounted with its turning center P set at a position offset by L from the center line C in the width direction of the vehicle. The floor area required for the work table 70 is secured. Note that the swivel base 40 shown in the present embodiment is configured to be swivelable within an angle range (for example, about 320 degrees) that does not damage a hydraulic oil hose or a cable (not shown).

  FIGS. 1 and 2 show the distal bending-type boom 50 in the retracted state. As shown in FIGS. 1 and 2, the distal-end bending-type boom 50 is pivoted by the pivot member 44 in the retracted state. The base 40 is pivotally connected to the distal end of the hoisting boom 51 by a hoisting boom 51 that is pivotally connected to the upper portion of the base 40 and extends forward and is provided so as to be hoistable in a vertical plane. It is comprised from the bending boom 55 provided so that bending within the inside was possible. As shown in FIG. 5, the undulation cylinder 42 disposed inside the swivel base 40 has a bottom side end portion pivoted to the swivel base 40 by a pivot member 43 and a rod side end portion pivoted. 52 is pivotally connected to the lower surface in the vicinity of the base end portion of the hoisting boom 51. For this reason, by operating the hoisting cylinder 42 to extend and retract, the hoisting boom 51 (the tip bending type boom 50) can be hoisted up and down in the vertical plane. The cylinder tube 42a of the hoisting cylinder 42 shuts off an oil passage that connects the hoisting control valve V2 (see FIG. 8) and the hoisting cylinder 42 when the hoisting cylinder 42 is not operating. A holding valve 42b that holds the operating position of the hoisting cylinder 42 is attached even if the hydraulic oil leaks due to breakage.

  6 shows a state in which the bending boom 55 is viewed from an oblique direction. As shown in FIG. 6, the bending boom 55 extends straight rearward from the proximal end portion pivoted to the hoisting boom 51. It comprises a side 56 and a bent boom distal end side 57 that is connected to the distal end (rear end) of the bent boom base end side 56 and bends and extends obliquely downward. Between the hoisting boom 51 and the bending boom 55 arranged side by side, a hydraulic bending and extending cylinder 60 is arranged extending in the front-rear direction. The bottom end of the bending cylinder 60 is pivotally connected to the right side surface of the hoisting boom 51 using a pivoting member 61 (see FIG. 5), and the rod side end of the bending cylinder 60 is the base end of the bending boom. The left side surface in the vicinity of the base end portion of the portion 56 is pivoted by using a pivoting member 62 (see FIG. 6). For this reason, the bending / extending boom 55 can be vertically bent and extended in the vertical plane with respect to the hoisting boom 51 by extending and retracting the bending / extending cylinder 60. Further, a mounting plate 63 extending rearward is attached to the bottom side end portion of the bending / stretching cylinder 60, and a holding valve 64 that holds the operating position of the bending / stretching cylinder 60 is mounted on the mounting plate 63. It is attached.

  FIG. 7 shows a state in which the stored work table 70 is viewed obliquely. As shown in FIG. 7, the work table 70 extends from the work floor 71 on which the worker gets on and the work floor 71. A handrail 72, an upper operating device 73 provided on the inner side of the handrail 72, and a cylinder mounting member 74 provided on the left side surface of the handrail 72 so as to extend vertically.

  The work floor 71 is configured to have an area where at least one worker can board. The handrail 72 is for preventing a worker on the work table 70 from falling, and a part on the right side (the handrail 72a shown in FIG. 2) is configured to be movable up and down. For this reason, when this handrail 72a is moved upward when boarding the worktable 70 or getting off the worktable 70, it can get on and off smoothly. The upper operation device 73 is configured to be able to perform a turning operation of the swivel base 40 and a undulation and bending operation of the tip bending-type boom 50.

  The cylinder mounting member 74 includes a swinging shaft portion 75 that is formed to extend leftward in the lower portion, and a bottom-side support portion 76 that is formed to extend leftward in the upper portion. As shown in FIG. 6, the swing shaft portion 75 of the cylinder mounting member 74 is attached to the distal end portion of the bending boom distal end side portion 57 and is rotatably supported. The bottom side support portion 76 of the cylinder mounting member 74 is pivotally connected to the bottom side end portion of the electric leveling cylinder 80, and the rod side end portion of the leveling cylinder 80 extends from the tip portion of the bending boom tip side portion 57. It is pivotally connected to a rod side support portion 58 formed to extend downward. For this reason, the working table 70 can be swung around the rocking shaft portion 75 by expanding and contracting the leveling cylinder 80.

  The aerial work vehicle 1 includes a undulation angle detector that detects the undulation angle of the undulation boom 51 relative to the vehicle, a bending / extension angle detector that detects the bending / extension angle of the bending boom 55 relative to the undulation boom 51, and a bending boom 55 (bending / extending boom 55). A rocking angle detector for detecting the rocking angle of the work table 70 with respect to the distal end side portion 57) is provided. Detection results (detection signals corresponding to the detection results) detected by these detectors (hereinafter collectively referred to as “angle detectors”) are input to the controller 30 (see FIG. 8).

  FIG. 8 is a block diagram relating to the control system of the aerial work vehicle 1. As shown in FIG. 8, the control unit 90 includes a controller 30 as the center of the control unit 90 and hydraulic pressure using hydraulic oil. A hydraulic supply device 31 that is generated and supplied, a control valve group 33 to which hydraulic pressure (hydraulic fluid) is supplied from the hydraulic supply device 31, a battery 34 for a bodywork device that supplies power to the controller 30 and the hydraulic supply device 31 Is provided.

  The controller 30 receives the operation signals output from the upper operation device 73 and the lower operation device 20 and the detection signal detected by the angle detector. In addition, electric power for driving the leveling cylinder 80 is input from the bodywork device battery 34 to the controller 30. The controller 30 controls the power supply from the bodywork device battery 34 to the leveling cylinder 80 based on the input detection signal, and the hydraulic pressure supply device 31 and the control valve group 33 based on the input operation signal. A command signal is output to the rotary motor 38, the hoisting cylinder 42, the bending cylinder 60, and the hydraulic jack 23 are controlled.

  The hydraulic pressure supply device 31 includes an electric motor M that is driven by receiving electric power from the bodywork device battery 34, a contactor 32 that opens and closes an electric circuit that supplies power from the bodywork device battery 34 to the electric motor M, and an electric motor. The hydraulic pump P is driven by the motor M to suck up the hydraulic oil and supply it to the control valve group 33 as pressure oil. The contactor 32 is controlled to open and close by a command signal from the controller 30. Specifically, when the close control is performed, electric power is supplied from the bodywork device battery 34 to the electric motor M and the electric motor M is rotationally driven. On the other hand, when the open control is performed, the bodywork device battery 34 is electrically operated. The power supply to the motor M is cut off, and the rotational drive of the electric motor M is stopped.

  8 shows the hydraulic pressure supply device 31 on which one electric motor M is mounted. For example, the two hydraulic motors M that drive the hydraulic pump P are mounted in parallel, and the hydraulic pressure supply device 31 is mounted. It may be configured. If the hydraulic pressure supply device 31 is configured in this way, when one electric motor M is driven for a certain period of time, the electric motor M is switched to the other electric motor M and driven, thereby suppressing the heat generation of the electric motor M due to continuous driving. A failure of the motor M can be effectively prevented.

  The control valve group 33 is an electromagnetic valve that performs supply / discharge control of hydraulic oil supplied from the hydraulic pump P based on, for example, a command signal from the controller 30, and is a swing that performs supply / discharge control of hydraulic oil to the swing motor 38. The control valve V1, the undulation control valve V2 that controls the supply / discharge of hydraulic oil to the undulation cylinder 42, the bending / extension control valve V3 that controls the supply / discharge of hydraulic oil to the bending / extension cylinder 60, and the hydraulic oil to the hydraulic jack 23 And a jack control valve V4 for performing supply / discharge control.

  The bodywork device battery 34 is configured by connecting a plurality of power supply batteries in series, and is a DC power source capable of storing power at a voltage of 24 [V], for example. As shown in FIGS. 3 (a) and 3 (b), the battery 34 for the bodywork device is mounted on the body part 13 below the bending boom 55. The aerial work vehicle 1 includes a chassis battery 35 in addition to the bodywork device battery 34. The chassis battery 35 is configured by connecting a plurality of power supply batteries in series, and is a DC power source capable of storing power at a voltage of, for example, 12 [V]. The chassis battery 35 is mounted on the left side of the chassis 10 as shown in FIG. 1 and FIG.

  So far, the overall configuration of the aerial work vehicle 1 has been described. Next, regarding the operation of the aerial work vehicle 1, the aerial work vehicle 1 travels to the work site, and after arriving at the work site, the operator gets on the work table 70 and operates the upper operation device 73. The case where the work place 70 is moved to a desired high place and the high place work is performed will be described as an example. First, as shown in FIGS. 1 to 3, the aerial work vehicle 1 is operated from the driving cab 12 while the tip bending type boom 50 and the workbench 70 are stored.

  Here, the retracted state of the distal bending boom 50 will be described. The distal bending boom 50 is stored in a state in which the boom boom 51 and the bending boom proximal end side portion 56 of the bending boom 55 are substantially horizontal and front and back above the operation cab 12. In this retracted state, as shown in FIGS. 3A and 3B, the bending cylinder 60 is not positioned above the hoisting boom 51, and the hoisting boom 51 and the bending boom proximal end side portion 56 are not located. Located between and. Further, the holding valve 64 is also located on the right side of the hoisting boom 51 without being located above the hoisting boom 51. For this reason, the aerial work vehicle 1 is configured to be able to suppress the vehicle height in the retracted state (during traveling).

  Next, the storage state of the work table 70 will be described. As shown in FIG. 6, the work platform 70 is attached to the distal end portion of the bending boom distal end side portion 57 inclined obliquely downward behind the operation cab 12. As a result, the work table 70 is stored on the right side of the swivel table 40 (the bending boom tip side portion 57) without being positioned above the hoisting boom 51, so that the vehicle height in the stored state (during travel) can be reduced. Can be suppressed.

  When the aerial work vehicle 1 arrives at the work site, the controller 30 is activated by operating the lower operation device 20. Subsequently, the operator causes the inner jack 26 to protrude downward from the outer jack 25 to ground the ground plate 27, and operates the lower operation device 20 to lift and support the vehicle by the hydraulic jack 23. As described above, after the vehicle is stably supported by the hydraulic jack 23 and the manual jack 24, the worker gets on the work table 70 using the lifting step 22. An operator who has boarded the work table 70 operates the upper operation device 73 to turn the swivel table 40, move the tip bending-bending boom 50 up and down, and move the work table 70 to a desired height. The aerial work vehicle 1 shown in the present embodiment is mounted only when the lower operation device 20 or the upper operation device 73 is operated and an operation signal is input to the controller 30 (when hydraulic oil supply is required). Electric power is supplied from the device battery 34 to the electric motor M, and the electric motor M is driven.

  FIG. 9A shows the movable range U of the work table 70 in a plan view with hatching, and as can be seen from FIG. 9A, the work table 70 is moved over a wide range, particularly in the left and right and the rear. It can be made to. Further, FIG. 9B shows the movable range S of the work table 70 in a side view with hatching, and as can be seen from FIG. It can be moved. As described above, the aerial work vehicle 1 is configured to store the hoisting boom 51 and the bending boom 55 (the bending boom proximal end side portion 56) side by side in a compact manner and store the work platform 70 in a wide range during storage. It has an easy-to-use configuration that can be used.

  When the work table 70 is moved to a high place, the controller 30 performs control to supply power to the leveling cylinder 80 so that the work floor 71 is held horizontally based on a detection signal from the angle detector. As a result, the leveling cylinder 80 is expanded and contracted, and the work floor 71 is always kept horizontal regardless of the undulation and bending operation of the tip bending boom 50. When the work table 70 reaches the desired height, the work table 70 is held in that position and the work is performed at the height.

  FIG. 10 shows a configuration in which a tip bending boom 50 according to the present invention is mounted by a solid line. On the other hand, as a reference for comparison, a tip bending boom 55T is formed using a bending boom 55T formed straight without bending the tip. The tip bending type boom 50T which secured the maximum lift (the movable height of the worktable 70) comparable to 50 is shown by the dotted line. As can be seen from FIG. 10, in the case of adopting the tip bending-type boom 50T, it is necessary to use the bending boom 55T that is longer in the axial direction than the bending boom 55 in order to ensure the maximum lift. Therefore, at the time of storage, the front end portion (rear end portion) of the bending boom 55T and the work table 70T are positioned rearward with respect to the swivel table 40, and the arrangement space of the work tool storage unit 14 is particularly restricted in the front-rear direction.

  On the other hand, in the distal bending boom 50, the bending boom 55 includes the bending boom distal end portion 57 bent downward with respect to the bending boom proximal end portion 56, so that the bending boom 55 is secured while ensuring the maximum lift. It can be avoided that the front end portion (rear end portion) and the work table 70 are positioned behind the swivel base 40 and stored. For this reason, the aerial work vehicle 1 according to the present invention can sufficiently secure the space for arranging the work tool storage portion 14 at the rear of the vehicle. Furthermore, the space of the ladder storage portion 21 extending in the front-rear direction is secured by effectively using the left space of the work tool storage portion 14 and the left space of the swivel base 40. In this way, the aerial work vehicle 1 secures a space for installing the swivel base 40 and a space for installing the work tool storage unit 14 by efficiently using the space on the bodywork part 13. However, a space for storing and holding the ladder 2 is secured.

  By the way, when parking a work with the left side of the aerial work vehicle 1 close to a wall or the like and performing a high work, it is difficult to access the vehicle from the left side. However, in the aerial work vehicle 1, it is possible to access from the rear of the vehicle and take out the tool or the like in the work tool storage unit 14 or take out the ladder 2 stored in the ladder storage unit 21. In addition, since getting on and off the work table 70 is performed by accessing from the right side of the vehicle, there is no problem in accessing the work table 70 even if the left side of the vehicle is parked against a wall or the like.

  In the above-described embodiment, the aerial work vehicle 1 configured by mounting the work tool storage portion 14 on the bodywork portion 13 behind the swivel base 40 has been described as an example. It is also possible to constitute an aerial work vehicle as shown in FIGS. FIGS. 11 to 13 show an aerial work vehicle 3 configured by mounting a loading platform 90 instead of the work tool storage unit 14, and the same members as the aerial work vehicle 1 are denoted by the same reference numerals. ing. Hereinafter, the aerial work vehicle 3 will be described focusing on the configuration of the loading platform 90.

  The loading platform 90 includes a bottom plate 91 having a substantially rectangular shape in plan view, a tilt plate 92 attached to a rear end portion and a right end portion of the bottom plate 91 so as to tilt outward, and a front end portion and a left end portion of the bottom plate 91. It is comprised from the side plate 93 standingly arranged, and is provided on the mounting part 13 so that it may be located in the rear right side of a vehicle (refer Fig.13 (a)). By tilting the tilt plate 92 outward, even a large work tool, for example, can be loaded on the loading platform 90 relatively easily from the rear of the vehicle and the right side of the vehicle. In addition, the work tool can be prevented from dropping from the load carrier 90 during traveling by loading the work tool on the load carrier 90 and then setting the tilt plate 92 in an upright state. Thus, the aerial work vehicle 3 is suitable for loading and transporting relatively large work tools and the like. For example, even when the left side of the vehicle is parked with a wall or the like parked, the loading platform 90 can be easily accessed from the rear of the vehicle and the right side of the vehicle, so that work tools and the like can be easily loaded and unloaded.

  In the above-described embodiment, the work tool storage portion 14 is provided on the bodywork portion 13 so as to be positioned on the right side of the rear portion of the vehicle, the work table 70 is stored so as to be accessible from the right side of the vehicle, and the ladder storage portion 21 is further connected to the vehicle. Although the structure provided on the mounting part 13 so that it may be located in the rear left part was illustrated and demonstrated, this invention is not limited to this structure. For example, the work tool storage portion 14 is provided on the bodywork portion 13 so as to be positioned on the left side of the rear of the vehicle, the work table 70 is stored so as to be accessible from the left side of the vehicle, and the ladder storage portion 21 is positioned on the right side of the rear portion of the vehicle. Thus, a configuration provided on the body part 13 is also possible.

  In the above-described embodiment, the configuration example using the electric leveling cylinder 80 has been described. However, for example, a hydraulic leveling cylinder may be used instead of this configuration.

  In the above-described embodiment, the configuration example in which the leveling control is performed by the leveling cylinder 80 based on the detection signal output from the angle detector has been described, but the present invention is not limited to this configuration example. For example, a detector that detects the inclination angle of the work floor 71 may be provided, and leveling control may be performed by the leveling cylinder 80 based on a detection signal output from the detector.

1 High lift work vehicle 10 Chassis (loading platform)
12 Driving cab (cab)
13 Bodywork (loading platform)
14 Work tool storage (rear storage)
21 Ladder storage (side storage)
40 Turntable 50 Tip-bend-extendable boom (boom)
51 Hoisting Boom 55 Bending / Extending Boom 56 Bending / Extending Boom Base End Side 57 Bending / Extending Boom Tip Side 60 Bending / Extending Cylinder 64 Holding Valve 70 Working Platform

Claims (5)

A vehicle that has a cab at the front and a carriage at the rear of the cab, and is capable of traveling,
A swivel that is positioned in the vicinity of the back of the operator's cab and that can be swung horizontally on the cargo bed;
A boom having a base end pivotally connected to the upper part of the swivel base and provided at least freely undulating;
A work table provided at a tip of the boom and moved by operation of the swivel base and the boom;
The boom has a base end portion pivotally connected to the upper part of the swivel base, and a boom boom that can freely move up and down. It is composed of a bending boom that can be bent and extended with respect to the undulating boom,
The bending boom extends integrally with the bending boom base end side portion whose base end portion is pivotally connected to the tip end portion of the hoisting boom and extends linearly from the base end portion, and the distal end portion of the bending boom base end side portion. Is formed in a substantially L shape with a bending boom tip side that extends and bends downward.
The workbench is provided at a distal end portion of the bending and extending boom distal end side portion and is located on the side of the distal end portion,
An aerial work vehicle characterized by comprising a rear storage portion located on the back of the platform located behind the swivel. The hoisting boom is stored in a state of extending substantially horizontally and forward above the operator cab,
The extension / contraction boom has the extension / contraction boom base end side extending substantially horizontally above the cab along with the hoisting boom, and the extension / contraction boom distal end side is located behind the cab and extends downward. Is stored as
2. The aerial work vehicle according to claim 1, wherein the work table is stored in a position on a side of the swivel base and the bending boom extension side portion. A bending and stretching cylinder for bending and extending the bending and stretching boom with respect to the hoisting boom
The bending / extending cylinder is disposed between the hoisting boom and the bending boom base end side portion in a plan view, and has one end portion pivoted to the hoisting boom and the other end portion to the bending boom base end side portion. The aerial work vehicle according to claim 1, wherein the work vehicle is located at a side of the hoisting boom in a state in which the boom is retracted. The bending and stretching cylinder is configured to expand and contract by receiving hydraulic pressure,
A holding valve for holding the expansion / contraction operation position of the bending and extending cylinder ;
The said holding valve is arrange | positioned between the said boom boom and the bending boom in planar view, and is located in the side of the said boom boom in the state which stored the said boom. The aerial work vehicle described in 1.   The side storage part provided in the front and back was provided on the said loading platform on the opposite side to the said work stand on both sides of the said bending-bending front-end | tip side part, The any one of Claims 1-4 characterized by the above-mentioned. The aerial work vehicle described in 1.

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