WO2017022336A1 - Working vehicle - Google Patents

Working vehicle Download PDF

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Publication number
WO2017022336A1
WO2017022336A1 PCT/JP2016/067760 JP2016067760W WO2017022336A1 WO 2017022336 A1 WO2017022336 A1 WO 2017022336A1 JP 2016067760 W JP2016067760 W JP 2016067760W WO 2017022336 A1 WO2017022336 A1 WO 2017022336A1
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WO
WIPO (PCT)
Prior art keywords
traveling body
ladder
state
pair
vertical direction
Prior art date
Application number
PCT/JP2016/067760
Other languages
French (fr)
Japanese (ja)
Inventor
和夫 三谷
Original Assignee
株式会社タダノ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社タダノ filed Critical 株式会社タダノ
Publication of WO2017022336A1 publication Critical patent/WO2017022336A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/52—Details of compartments for driving engines or motors or of operator's stands or cabins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R3/00—Arrangements of steps or ladders facilitating access to or on the vehicle, e.g. running-boards
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C15/00—Safety gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/36—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
    • B66C23/42—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes with jibs of adjustable configuration, e.g. foldable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details

Definitions

  • the present invention relates to a work vehicle having a ladder for getting on and off a revolving structure.
  • FIG. 4 of Patent Document 1 discloses a mobile crane that is an example of a work vehicle.
  • the mobile crane of Patent Document 1 includes a traveling vehicle, a swivel base that can turn on the travel vehicle, a telescopic boom that can be raised and lowered relative to the swivel base, and a cab in which an operator of the mobile crane is boarded. And a ladder for getting on and off the cab.
  • a ladder is provided immediately below the doorway of the cab.
  • the turntable may protrude from the left and right directions of the traveling vehicle at the position where the ladder is installed, which may hinder the operator from getting on and off the ladder.
  • the swivel base must be turned to the state shown in FIG.
  • the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a work vehicle including a ladder that can easily get on and off regardless of the state of a turning body that turns on a traveling body.
  • a work vehicle includes a traveling body, a first state that fits in a lateral width of the traveling body on the traveling body, and at least one of left and right directions protruding from the traveling body. And a pair of struts each extending in the vertical direction at positions spaced apart in the width direction, and a pair of struts extending in the width direction at positions spaced apart in the vertical direction. And a ladder composed of a plurality of connected treads. The ladder is disposed on a side surface of the traveling body between a first position and a second position separated from each other in the front-rear direction of the traveling body around a rotation axis extending in the vertical direction on one side of the pair of support columns. Rotate.
  • the ladder can be moved to a position where it can be easily climbed according to the state of the revolving structure. That is, it is possible to obtain a work vehicle having a ladder that is easy to get on and off regardless of the state of the revolving structure. In other words, it is possible to get on and off the ladder without returning the revolving structure to the first state, so that the working efficiency of the work vehicle is improved.
  • the traveling body is provided with recesses in at least three places separated in the front-rear direction.
  • the pair of support columns is provided with a convex portion that can advance and retract in the vertical direction with respect to the concave portion.
  • the ladder is fixed to the traveling body at the first position where the convex part enters the concave part at the center and the rear and the second position where the convex part enters the concave part at the front and the center. Is done. Further, the ladder rotates around the rotation axis passing through the position of the convex portion with only one of the pair of convex portions entering the concave portion.
  • a pair of the above-mentioned support columns is provided with a recess.
  • the traveling body is provided with convex portions that can advance and retreat in the vertical direction with respect to the concave portion in at least three places separated in the front-rear direction.
  • the ladder is fixed to the traveling body at the first position where the central and rear convex portions enter the concave portion and the second position where the front and central convex portions enter the concave portion. Is done. Further, the ladder rotates around the rotation axis passing through the position of the concave portion with the convex portion entering only one of the pair of concave portions.
  • the convex portion is movable between a protruding position that enters the concave portion and a retracted position that retreats from the protruding position and exits from the concave portion.
  • the work vehicle includes a biasing member that biases the convex portion toward the protruding position.
  • the convex portion since the convex portion is biased toward the protruding position, the convex portion can be prevented from unintentionally leaving the concave portion. As a result, it is possible to suppress the ladder from falling off the traveling body while the traveling body is traveling or when the operator gets on and off.
  • the revolving structure includes a cabin on which an operator of the work vehicle is boarded.
  • the first position is directly below the cabin entrance of the revolving structure in the first state.
  • the second position is a position in front of the revolving body in the second state in which the entrance / exit of the cabin faces forward.
  • the ladder in the first position when the swinging body is in the first state, the ladder in the first position may be boarded / exited, and when the swinging body is in the second state, the ladder in the second state may be boarded / exited.
  • the ladder is disposed immediately below the cabin entrance / exit refers to, for example, a state in which at least a part of the width of the entrance / exit of the cabin and the width of the ladder overlap in the front-rear direction of the traveling body.
  • a work vehicle includes a traveling body, a first state that fits in a lateral width of the traveling body on the traveling body, and at least one of the lateral direction from the traveling body.
  • a swiveling body that can turn in the overhanging second state, a pair of struts extending in the vertical direction at positions spaced apart in the width direction, and a pair of struts extending in the width direction at positions spaced apart in the vertical direction
  • a ladder composed of a plurality of treads connected to the vehicle, a first end supported by the traveling body so as to be rotatable about a first rotation axis extending in the vertical direction, and the traveling from the first end.
  • the arm having a second end disposed at a position close to the side surface of the body.
  • the arm includes a first posture in which the second end portion is located rearward of the first end portion and a second posture in which the second end portion is located forward of the first end portion.
  • the ladder is supported by the second end of the arm so as to be rotatable around a second rotation axis extending in the vertical direction on the side surface of the traveling body.
  • one of a pair of the support columns is supported by the second end portion of the arm.
  • the ladder further rotates around the second rotation axis between the first position and the second position separated in the front-rear direction of the traveling body in a state where the posture of the arm is fixed.
  • a work vehicle includes a traveling body in which a rail extending in the front-rear direction is provided on a side surface, and a first state that fits in a lateral width of the traveling body on the traveling body. And a revolving body that can turn in at least one of the left and right directions from the traveling body, a pair of struts extending in the vertical direction at positions separated in the width direction, and a position spaced in the vertical direction. And a ladder composed of a plurality of treads each extending in the width direction and connected to the pair of support columns. And the said ladder is supported by the said traveling body so that the movement to the front-back direction of the said traveling body is possible along the said rail.
  • the ladder can be moved according to the state of the turning body, it is possible to obtain a work vehicle equipped with a ladder that can easily get on and off regardless of the state of the turning body.
  • FIG. 1 is an external perspective view of a rough terrain crane 10 according to the present embodiment.
  • 2 is an enlarged view of region II in FIG. 1, (A) shows the ladder 40 in the first position, (B) shows the rotating ladder 40, and (C) shows the ladder 40 in the second position.
  • Indicates. 3A and 3B are enlarged perspective views of the engaging portion 26 and the engaged portion 48.
  • FIG. 3A shows the lock pin 48A in the protruding position
  • FIG. 3B shows the lock pin 48A in the retracted position.
  • FIGS. 4A and 4B are enlarged views of the region II according to the modified example 1.
  • FIG. 4A shows the arm 50 in the first posture
  • FIG. 4B shows the arm 50 in the second posture and the ladder 40A in the second position.
  • FIGS. 5A and 5B are enlarged views of the region II according to the modification 2.
  • FIG. 5A shows the ladder 40B moved forward
  • FIG. 5B shows the ladder 40B moved backward.
  • the vertical direction is defined as the vertical direction 7
  • the straight direction of the rough terrain crane 10 is defined as the front-rear direction 8
  • the direction perpendicular to the vertical direction 7 and the front-rear direction 8 is defined as the left-right direction 9. .
  • the rough terrain crane 10 As shown in FIG. 1, the rough terrain crane 10 according to the present embodiment mainly includes a lower traveling body (an example of a traveling body) 20, an upper turning body (an example of a rotating body) 30, and a ladder 40. .
  • the rough terrain crane 10 is an example of a work vehicle. However, a specific example of the work vehicle is not limited to the rough terrain crane 10, and may be, for example, an all terrain crane, a cargo crane, an aerial work vehicle, or the like.
  • the lower traveling body 20 has a pair of left and right front wheels 21 and a pair of left and right rear wheels 22 (only the right side is shown in FIG. 1).
  • the front wheels 21 and the rear wheels 22 are rotated by the driving force of an engine (not shown) transmitted via a transmission (not shown).
  • the lower traveling body 20 is not limited to two axes, and may be three or more axes.
  • the lower traveling body 20 travels when a steering wheel, an accelerator pedal, a brake pedal, and the like installed in a cabin 34 described later are operated by an operator.
  • the lower traveling body 20 has outriggers 23 and 24.
  • the outriggers 23 and 24 can change state between an overhanging state where the outriggers 23 and 24 are grounded to the ground at a position protruding in the left-right direction 9 and a retracted state where the outriggers 23 and 24 are stored in the lower traveling body 20 while being separated from the ground. It is.
  • the outriggers 23 and 24 are placed in a retracted state when the lower traveling body 20 travels.
  • engaging portions 25, 26, and 27 are provided on the right side surface of the lower traveling body 20.
  • the engaging portions 25 to 27 are provided at three equal intervals in the front-rear direction 8.
  • concave portions 25A, 26A, and 27A opened upward are formed in the engaging portions 25 to 27, respectively.
  • the recesses 25A to 27A support the engaged portions 48 and 49 by receiving lock pins 48A and 49A of the engaged portions 48 and 49 described later.
  • the engagement portions 25 to 27 are not limited to three locations, and may be two locations or four or more locations.
  • the upper turning body 30 is supported by the lower traveling body 20 through a turning bearing (not shown) so as to be turnable.
  • the upper swing body 30 mainly includes a telescopic boom 32, a hook 33, and a cabin 34.
  • the telescopic boom 32 is supported by the upper swing body 30 so as to be able to undulate and extend.
  • the hook 33 is suspended from a rope 38 that extends downward from the distal end of the telescopic boom 32.
  • the cabin 34 is provided with the above-described various operation units for causing the lower traveling body 20 to travel, and various levers and operation panels for operating the upper swing body 30. Further, the cabin 34 is provided with an entrance / exit 34 ⁇ / b> A substantially in the center of the front wheel 21 and the rear wheel 22 in the front-rear direction 8.
  • the upper turning body 30 turns on the lower traveling body 20 in the turning range 30A of FIG.
  • the upper turning body 30 shown in FIG. 1 is in a first state that fits in the width in the left-right direction 9 of the lower traveling body 20.
  • the entrance 34 ⁇ / b> A of the cabin 34 faces the right side of the rough terrain crane 10.
  • the upper swing body 30 is in the second state in which the lower swing body 20 projects in at least one of the left and right directions 9 by turning from the first state shown in FIG.
  • the front portion of the upper swing body 30 protrudes leftward from the left side surface of the lower traveling body 20, and the rear portion of the upper swing body 30 is lower. Projects to the right from the right side of the traveling body 20.
  • the entrance 34 ⁇ / b> A of the cabin 34 faces the front of the rough terrain crane 10.
  • the front portion of the upper swing body 30 protrudes rightward from the right side surface of the lower traveling body 20, and the upper swing body 30 The rear part protrudes leftward from the left side surface of the lower traveling body 20.
  • the entrance 34 ⁇ / b> A of the cabin 34 faces the rear of the rough terrain crane 10.
  • the upper turning body 30 is turned by a turning motor (not shown).
  • the telescopic boom 32 is raised and lowered by a hoisting cylinder 35 and extended and retracted by an extending and retracting cylinder (not shown).
  • the telescopic boom 32 is not limited to a box-type boom, and may be a lattice-type jib.
  • the hook 33 is moved up and down by winding and unwinding the rope 38 by a winch (not shown).
  • the actuator that operates the swing motor, the hoisting cylinder, the telescopic cylinder, the winch, and the outriggers 23 and 24 is, for example, a hydraulic actuator. That is, the rough terrain crane 10 drives each actuator by controlling the direction and flow rate of the hydraulic fluid to be supplied.
  • the actuator of the present invention is not limited to a hydraulic type, and may be an electric type or the like.
  • the ladder 40 is supported on the side surface (right side surface in the present embodiment) of the lower traveling body 20.
  • the ladder 40 is used by an operator of the rough terrain crane 10 to get on and off the lower traveling body 20 (typically, the cabin 34).
  • the ladder 40 shown in FIG. 1 is disposed immediately below the entrance / exit 34A of the cabin 34 when the upper swing body 30 is in the first state.
  • the position of the ladder 40 shown in FIG. 1 is an example of a first position.
  • the ladder 40 mainly includes a pair of support columns 41 and 42 and a plurality of tread plates 43, 44, 45, 46, and 47.
  • Each of the support columns 41 and 42 extends in the vertical direction 7 at a position separated in the width direction of the ladder 40.
  • the tread plates 43 to 47 are spaced apart in the vertical direction 7 between the pair of support columns 41 and 42.
  • each of the tread plates 43 to 47 extends in the width direction of the ladder 40 and is connected to a pair of support columns 41 and 42.
  • the width direction of the ladder 40 coincides with the front-rear direction 8 of the traveling body 20 when the ladder 40 is in the first position and a second position described later.
  • the ladder 40 includes engaged portions 48 and 49.
  • the engaged portions 48 and 49 are provided on the support columns 41 and 42. More specifically, the engaged portion 48 is provided at the upper end of the support column 41 and on the outer side in the width direction (the side opposite to the support column 42). Further, the engaged portion 49 is provided on the upper end of the support column 42 and on the outer side in the width direction (the side opposite to the support column 41).
  • the to-be-engaged parts 48 and 49 since the structure of the to-be-engaged parts 48 and 49 is common, only the to-be-engaged part 48 is demonstrated below.
  • the engaged portion 48 mainly includes a lock pin (an example of a convex portion) 48A and a coil spring (an example of an urging member) 48B.
  • the lock pin 48A has a substantially cylindrical outer shape (circular horizontal cross section). The outer diameter of the lock pin 48A is smaller than the diameter of the recesses 25A to 27A.
  • the lock pin 48A is movable between a projecting position projecting downward (see FIG. 3A) and a retracted position retracting upward from the projecting position (see FIG. 3B).
  • the coil spring 48B biases the lock pin 48A toward the protruding position (ie, downward).
  • the lock pin 48A at the protruding position can enter one of the recesses 25A to 27A.
  • the lock pin 48A that has entered one of the recesses 25A to 27A is restricted from moving in the front-rear direction 8 and the left-right direction 9 by the wall surface that defines the recesses 25A to 27A. It is rotatably supported around 48E.
  • the lock pin 48B in the retracted position is retracted from the recesses 25A to 27A.
  • the lock pin 48A is provided with a gripping portion 48C that protrudes in a direction that intersects the moving direction of the lock pin 48A (ie, the vertical direction 7).
  • the grip portion 48C protrudes outside the engaged portion 48 through a slit 48D extending in the vertical direction 7. Then, when the operator of the rough terrain crane 10 lifts the gripping portion 48C along the slit 48D, the lock pin 48A can be moved from the protruding position to the retracted position against the urging force of the coil spring 48B.
  • the lock pin 48A enters the recess 26A of the center engaging portion 26 among the three engaging portions 25 to 27, and the rear engaging portion 27 is inserted.
  • the lock pin 49A enters the recess 27A
  • the lower traveling body 20 is fixed at the first position.
  • the ladder 40 at the first position is fixed to the traveling body 20 in a state where the width direction of the ladder 40 coincides with the front-rear direction 8 of the traveling body 20. That is, the operator can get on and off the cabin 34 through the ladder 40 at the first position when the upper swing body 30 is in the first state.
  • the ladder 40 rotates around the rotation axis 48E when the lock pin 48A enters the recess 26A and the lock pin 49A retracts from the recess 27A.
  • the rotation axis 48E is an imaginary line extending in the vertical direction 7 through the radial center position of the lock pin 48A. That is, the ladder 40 shown in FIG. 2 (B) can rotate between the first position shown in FIG. 2 (A) and the second position shown in FIG. 2 (C).
  • the ladder 40 has a lock pin 48A that enters the recess 26A of the central engaging portion 26 among the three engaging portions 25 to 27, and the front engaging portion is engaged.
  • the lock pin 49A enters the recess 25A of the portion 25, the lock pin 49A is fixed to the lower traveling body 20 at the second position.
  • the ladder 40 in the second position is fixed to the traveling body 20 in a state in which the width direction of the ladder 40 coincides with the front-rear direction 8 of the traveling body 20 at a position in front of the upper swing body 30 in the second state. . That is, the operator can get on and off the cabin 34 through the ladder 40 at the second position when the upper swing body 30 is in the second state.
  • the rotation center of the ladder 40 is not limited to the position of the lock pin 48A.
  • the ladder 40 can also rotate around a rotation axis extending in the vertical direction 7 through the position of the lock pin 49A when the lock pin 48A retreats from the recess 26A and the lock pin 49A enters the recess 27A. it can. That is, the ladder 40 can rotate around a rotation axis extending in the vertical direction 7 on one side of the pair of support columns 41 and 42.
  • the ladder 40 can be moved further rearward than the first position shown in FIG. 2A or further forward than the second position shown in FIG.
  • an engaging portion may be further provided in front of the engaging portion 25 and behind the engaging portion 27.
  • the ladder 40 can be stably supported at each position.
  • the engaging portion is not further provided in front of the engaging portion 25 and behind the engaging portion 27 by overlapping with the position of the front wheel 21 or the rear wheel 22, the ladder 40 is positioned rearward or first from the first position. It may be cantilevered at a position ahead of the two positions.
  • the ladder 40 further rearward than the first position is a position where the upper swing body 30 shown in FIG. 1 is easily turned on and off the cabin 34 when the upper swing body 30 turns right and enters the second state. That is, the position of the ladder 40 further rearward than the first position is another example of the second position rearward of the upper swing body 30 when the entrance / exit 34A of the cabin 34 faces rearward. Thus, as long as the 1st position and the 2nd position are spaced apart in the front-back direction 8, either may be ahead.
  • the first position is not limited to this.
  • the entrance / exit 34A when the upper-part turning body 30 is in the first state may be located immediately above the wheel on the rear side of the front axle.
  • the first position may be a position that overlaps the wheel on the rear side of the front axle in the front-rear direction 8 (that is, directly below the entrance / exit 34A).
  • the engaged portions 48 and 49 are provided outside the support columns 41 and 42, so that the turning radius of the ladder 40 can be increased.
  • the position of the rotation axis is not limited to the above example, and may be the position of the columns 41 and 42 or the position between the columns 41 and 42.
  • the lock pin 48A is held at the protruding position by the urging force and gravity of the coil spring 48B, so that the lock pin 48A can be prevented from unintentionally leaving the recess 26A.
  • the lock pin 48A it is possible to suppress the ladder 40 from falling off the lower traveling body 20 while the lower traveling body 20 is traveling or when the operator gets on and off.
  • lock pins may be provided in at least three places in the front-rear direction 8 of the lower traveling body 20, and recesses may be provided in the pair of support columns 41 and 42, respectively.
  • the lock pin moves between a protruding position protruding upward and a retracted position below the protruding position. Further, the recess in this case is opened downward.
  • Other configurations are the same as those in the above-described embodiment, and thus the description thereof is omitted.
  • the example in which the engaged portions 48 and 49 are provided only at the upper ends of the columns 41 and 42 has been described.
  • the positions of the engaged portions 48 and 49 are not limited thereto, and the columns 41 are not limited thereto.
  • 42 may be provided in the middle, or may be provided at two places, the upper end and the lower end of the support columns 41, 42.
  • the example in which the ladder 40 is attached to the side surface of the lower traveling body 20 has been described.
  • the ladder 40 may constitute a part of the side surface of the lower traveling body 20.
  • the rough terrain crane 10 may include an actuator that rotates the ladder 40, an actuator that moves the lock pins 48A and 49A forward and backward, and a control unit that controls each actuator.
  • the configuration for moving the ladder 40 in the front-rear direction 8 is not limited to the example of the above embodiment.
  • Modifications 1 and 2 will be described with reference to FIGS. 4 and 5. A detailed description of points common to the above embodiment will be omitted, and differences will be mainly described. Modifications 1 and 2 differ from the above embodiment in the structure for supporting the ladder 40, and the other points are common to the above embodiment.
  • the rough terrain crane 10 which concerns on the modification 1 is further provided with the elongate bar-shaped arm 50, as FIG. 4 shows.
  • engagement portions 25 and 26 are provided at at least two places separated in the front-rear direction 8. Note that the interval between the engaging portions 25 and 26 in the front-rear direction 8 is set to be longer (approximately twice) than in the above embodiment.
  • the engaged portion 48 is provided only on one of the pair of columns 41 and 42 (column 41 in the example of FIG. 4).
  • the arm 50 is disposed between the lower traveling body 20 and the upper swing body 30, for example.
  • the arm 50 is disposed at a position closer to the right side surface of the lower traveling body 20 than the first end 51, and is supported by the lower traveling body 20 so as to be rotatable about the first rotation axis 51A.
  • a second end 52 a second end 52.
  • the first rotation axis 51 ⁇ / b> A is a virtual line that extends in the vertical direction 7 through the first end 51.
  • the arm 50 rotates around the first rotation axis 51A, whereby the second end 52 is positioned behind the first end 51 (see FIG. 4A) and the second end.
  • the posture of the portion 52 is changed to the second posture (see FIGS. 4B and 4C) located in front of the first end portion 51.
  • the strut 41 of the ladder 40A is supported by the engaging portions 25 and 26 when the lock pin 48A enters one of the recesses 25A and 26A.
  • the column 42 of the ladder 40A is supported by the second end 52 so as to be rotatable around the second rotation axis 52A.
  • the second rotation axis 52 ⁇ / b> A is a virtual line that extends in the vertical direction 7 through the second end 52. That is, in the ladder 40A according to the first modification, one side of the pair of support columns 41 and 42 is supported by one of the engaging portions 25 and 26, and the other side can be rotated by the second end portion 52 of the arm 50. Supported.
  • the engaged portion 48 of the support column 41 is supported by the engaging portion 26 when the arm 50 is in the first posture, as shown in FIG. Further, when the lock pin 48A is retracted from the recess 26A and the arm 50 is rotated from the first posture to the second posture, the ladder 40A supported by the second end portion 52 is also moved forward. Then, the engaged portion 48 of the support column 41 is supported by the engaging portion 25 when the arm 50 is in the second posture, as shown in FIG.
  • the ladder 40A can be rotated around the second rotation axis 52A in a state where the arm 50 is fixed in the second posture by retracting the lock pin 48A of the engaged portion 48 from the recess 25A. Then, by rotating the ladder 40A shown in FIG. 4B by 180 °, the engaged portion 48 of the support column 41 is supported by the engaging portion 26 as shown in FIG. 4C. .
  • the position of the ladder 40A shown in FIG. 4C is an example of the first position
  • the position of the ladder 40A shown in FIG. 4B is an example of the second position.
  • the moving distance of the ladder 40A in the front-rear direction 8 can be increased.
  • the position of the ladder 40A shown in FIG. 4A and the position shown in FIG. 4B are shown.
  • a ladder 40A can be further disposed between the position of the ladder 40A.
  • the ladder 40 ⁇ / b> A can be further easily arranged at a position where the passenger can easily get on and off according to the state of the upper swing body 30.
  • the rough terrain crane 10 which concerns on the modification 2 is equipped with the rails 28 and 29 extended in the front-back direction 8 on the side surface of the traveling body 20, as FIG. 5 shows.
  • the rails 28 and 29 are spaced apart in the vertical direction 7.
  • the ladder 40 ⁇ / b> B according to the modification 2 includes engaged portions 41 ⁇ / b> A and 42 ⁇ / b> A that are engaged with the rail 28 and engaged portions 41 ⁇ / b> B and 42 ⁇ / b> B that are engaged with the rail 29.
  • the engaged portions 41A and 41B are provided on the column 41 at positions spaced apart in the vertical direction 7, and the engaged portions 42A and 42B are provided on the column 42 at positions spaced apart in the vertical direction 7.
  • the ladder 40B is supported on the side surface of the lower traveling body 20 by the engaged portions 41A to 42B being engaged with the rails 28 and 29. Further, the ladder 40B can move in the front-rear direction 8 of the lower traveling body 20 along the rails 28 and 29 by the engaged portions 41A to 42B being guided by the rails 28 and 29. According to the second modification, the position of the ladder 40B can be continuously changed, so that the ladder 40B can be more easily arranged at a position where the passenger can easily get on and off according to the state of the upper swing body 30.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Step Arrangements And Article Storage (AREA)
  • Control And Safety Of Cranes (AREA)
  • Jib Cranes (AREA)
  • Ladders (AREA)

Abstract

Provided is a working vehicle comprising a ladder which, irrespective of the state of a rotating body rotating on a traveling body, provides easy access to and from the rotating body. A rough-terrain crane (10) is provided with: a lower traveling body (20); an upper rotating body (30) capable of rotating to a first state in which the upper rotating body (30) lies within the width of the lower traveling body (20) in left and right directions (9), and to a second state in which the upper rotating body (30) protrudes from the lower traveling body (20) in at least one of the left and right directions (9); and a ladder (40) constituted by a pair of supports extending in top and bottom directions 7 at positions separated from each other in the width direction, and by a plurality of rungs extending in the width direction at positions separated from each other in the top and bottom directions 7, the plurality of rungs being connected to the pair of supports. The ladder (40) pivots about a pivot axis between a first position and a second position, which are separated from each other in front and rear directions (8), the pivot axis extending along a side surface of the lower traveling body (20) in the top and bottom directions (7) through one of the pair of supports.

Description

作業車両Work vehicle
　この発明は、旋回体に乗降するための梯子を備えた作業車両に関する。 The present invention relates to a work vehicle having a ladder for getting on and off a revolving structure.
　例えば特許文献１の図４には、作業車両の一例である移動式クレーンが開示されている。特許文献１の移動式クレーンは、走行車両と、走行車両上で旋回可能な旋回台と、旋回台に対して起伏可能で且つ伸縮可能な伸縮ブームと、移動式クレーンのオペレータが搭乗する運転室と、運転室に乗降するための梯子とを備えている。 For example, FIG. 4 of Patent Document 1 discloses a mobile crane that is an example of a work vehicle. The mobile crane of Patent Document 1 includes a traveling vehicle, a swivel base that can turn on the travel vehicle, a telescopic boom that can be raised and lowered relative to the swivel base, and a cab in which an operator of the mobile crane is boarded. And a ladder for getting on and off the cab.
実登２５６６６１８号公報Noto 2566618 gazette
　特許文献１の図４に記載の移動式クレーンにおいて、運転室の出入口の直下に梯子が設けられている。しかしながら、旋回台が図４の状態から旋回すると、梯子の設置位置において走行車両の左右方向から旋回台が張り出して、梯子によるオペレータの乗降を妨げる可能性がある。または、オペレータが運転室に乗降する前に、特許文献１の図４の状態に旋回台を旋回させなければならない。 In the mobile crane shown in FIG. 4 of Patent Document 1, a ladder is provided immediately below the doorway of the cab. However, if the turntable turns from the state shown in FIG. 4, the turntable may protrude from the left and right directions of the traveling vehicle at the position where the ladder is installed, which may hinder the operator from getting on and off the ladder. Or, before the operator gets in and out of the cab, the swivel base must be turned to the state shown in FIG.
　本発明は、上記の事情に鑑みてなされたものであり、その目的は、走行体上で旋回する旋回体の状態によらず、乗降しやすい梯子を備えた作業車両を提供することにある。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a work vehicle including a ladder that can easily get on and off regardless of the state of a turning body that turns on a traveling body.
　(1)　本発明の一形態に係る作業車両は、走行体と、上記走行体上において、上記走行体の左右方向の幅に収まる第１状態、及び上記走行体から左右方向の少なくとも一方に張り出した第２状態に旋回可能な旋回体と、幅方向に離間した位置において各々が上下方向に延びる一対の支柱、及び上下方向に離間した位置において各々が上記幅方向に延びて一対の上記支柱に接続される複数の踏板で構成される梯子とを備える。そして、上記梯子は、上記走行体の側面において、上記走行体の前後方向に離間した第１位置及び第２位置の間を、一対の上記支柱の一方側において上下方向に延びる回動軸線周りに回動する。 (1) A work vehicle according to an embodiment of the present invention includes a traveling body, a first state that fits in a lateral width of the traveling body on the traveling body, and at least one of left and right directions protruding from the traveling body. And a pair of struts each extending in the vertical direction at positions spaced apart in the width direction, and a pair of struts extending in the width direction at positions spaced apart in the vertical direction. And a ladder composed of a plurality of connected treads. The ladder is disposed on a side surface of the traveling body between a first position and a second position separated from each other in the front-rear direction of the traveling body around a rotation axis extending in the vertical direction on one side of the pair of support columns. Rotate.
　上記構成によれば、旋回体の状態に応じて登りやすい位置に梯子を移動させることができる。すなわち、旋回体の状態によらず、乗降しやすい梯子を備えた作業車両を得ることができる。換言すれば、旋回体を第１状態に戻さなくても梯子を乗降することができるので、作業車両の作業効率が向上する。 According to the above configuration, the ladder can be moved to a position where it can be easily climbed according to the state of the revolving structure. That is, it is possible to obtain a work vehicle having a ladder that is easy to get on and off regardless of the state of the revolving structure. In other words, it is possible to get on and off the ladder without returning the revolving structure to the first state, so that the working efficiency of the work vehicle is improved.
　(2)　一例として、上記走行体には、前後方向に離間した少なくとも３箇所に凹部が設けられている。また、一対の上記支柱には、上記凹部に対して上下方向に進退可能な凸部が設けられている。そして、上記梯子は、中央及び後方の上記凹部に上記凸部が進入した上記第１位置と、前方及び中央の上記凹部に上記凸部が進入した上記第２位置とにおいて、上記走行体に固定される。さらに、上記梯子は、一対の上記凸部の一方のみが上記凹部に進入した状態で、当該凸部の位置を通る上記回動軸線周りに回動する。 (2) As an example, the traveling body is provided with recesses in at least three places separated in the front-rear direction. Further, the pair of support columns is provided with a convex portion that can advance and retract in the vertical direction with respect to the concave portion. The ladder is fixed to the traveling body at the first position where the convex part enters the concave part at the center and the rear and the second position where the convex part enters the concave part at the front and the center. Is done. Further, the ladder rotates around the rotation axis passing through the position of the convex portion with only one of the pair of convex portions entering the concave portion.
　(3)　他の例として、一対の上記支柱には、凹部が設けられている。また、上記走行体には、前後方向に離間した少なくとも３箇所に、上記凹部に対して上下方向に進退可能な凸部が設けられている。そして、上記梯子は、中央及び後方の上記凸部が上記凹部に進入した上記第１位置と、前方及び中央の上記凸部が上記凹部に進入した上記第２位置とにおいて、上記走行体に固定される。さらに、上記梯子は、一対の上記凹部の一方のみに上記凸部が進入した状態で、当該凹部の位置を通る上記回動軸線周りに回動する。 (3) As another example, a pair of the above-mentioned support columns is provided with a recess. In addition, the traveling body is provided with convex portions that can advance and retreat in the vertical direction with respect to the concave portion in at least three places separated in the front-rear direction. The ladder is fixed to the traveling body at the first position where the central and rear convex portions enter the concave portion and the second position where the front and central convex portions enter the concave portion. Is done. Further, the ladder rotates around the rotation axis passing through the position of the concave portion with the convex portion entering only one of the pair of concave portions.
　(4)　好ましくは、上記凸部は、上記凹部に進入する突出位置と、上記突出位置より後退して、上記凹部から退出する後退位置との間を移動可能である。そして、該作業車両は、上記突出位置へ向けて上記凸部を付勢する付勢部材を備える。 (4) Preferably, the convex portion is movable between a protruding position that enters the concave portion and a retracted position that retreats from the protruding position and exits from the concave portion. The work vehicle includes a biasing member that biases the convex portion toward the protruding position.
　上記構成によれば、突出位置に向けて凸部が付勢されているので、凸部が凹部から意図せずに退出するのを抑制できる。その結果、走行体の走行中やオペレータの乗降中に梯子が走行体から脱落するのを抑制できる。 According to the above configuration, since the convex portion is biased toward the protruding position, the convex portion can be prevented from unintentionally leaving the concave portion. As a result, it is possible to suppress the ladder from falling off the traveling body while the traveling body is traveling or when the operator gets on and off.
　(5)　好ましくは、上記旋回体は、該作業車両のオペレータが搭乗するキャビンを備える。そして、上記第１位置は、上記第１状態の上記旋回体の上記キャビンの出入口の直下である。また、上記第２位置は、上記キャビンの出入口が前方を向く上記第２状態の上記旋回体より前方の位置である。 (5) Preferably, the revolving structure includes a cabin on which an operator of the work vehicle is boarded. The first position is directly below the cabin entrance of the revolving structure in the first state. The second position is a position in front of the revolving body in the second state in which the entrance / exit of the cabin faces forward.
　上記構成によれば、旋回体が第１状態のときは第１位置の梯子を乗降し、旋回体が第２状態のときは第２状態の梯子を乗降すればよい。なお、「キャビンの出入口の直下に梯子が配置される」とは、例えば、走行体の前後方向において、キャビンの出入口の幅及び梯子の幅の少なくとも一部同士が重なる状態を指す。 According to the above configuration, when the swinging body is in the first state, the ladder in the first position may be boarded / exited, and when the swinging body is in the second state, the ladder in the second state may be boarded / exited. Note that “the ladder is disposed immediately below the cabin entrance / exit” refers to, for example, a state in which at least a part of the width of the entrance / exit of the cabin and the width of the ladder overlap in the front-rear direction of the traveling body.
　(6)　本発明の他の形態に係る作業車両は、走行体と、上記走行体上において、上記走行体の左右方向の幅に収まる第１状態、及び上記走行体から左右方向の少なくとも一方に張り出した第２状態に旋回可能な旋回体と、幅方向に離間した位置において各々が上下方向に延びる一対の支柱、及び上下方向に離間した位置において各々が上記幅方向に延びて一対の上記支柱に接続される複数の踏板で構成される梯子と、上下方向に延びる第１回動軸線周りに回動可能に上記走行体に支持された第１端部、及び上記第１端部より上記走行体の側面に近い位置に配置された第２端部を有するアームとを備える。そして、上記アームは、上記第２端部が上記第１端部より後方に位置する第１姿勢と、上記第２端部が上記第１端部より前方に位置する第２姿勢との間を回動する。また、上記梯子は、上記走行体の側面において、上下方向に延びる第２回動軸線周りに回動可能に、上記アームの上記第２端部に支持されている。 (6) A work vehicle according to another embodiment of the present invention includes a traveling body, a first state that fits in a lateral width of the traveling body on the traveling body, and at least one of the lateral direction from the traveling body. A swiveling body that can turn in the overhanging second state, a pair of struts extending in the vertical direction at positions spaced apart in the width direction, and a pair of struts extending in the width direction at positions spaced apart in the vertical direction A ladder composed of a plurality of treads connected to the vehicle, a first end supported by the traveling body so as to be rotatable about a first rotation axis extending in the vertical direction, and the traveling from the first end. And an arm having a second end disposed at a position close to the side surface of the body. The arm includes a first posture in which the second end portion is located rearward of the first end portion and a second posture in which the second end portion is located forward of the first end portion. Rotate. The ladder is supported by the second end of the arm so as to be rotatable around a second rotation axis extending in the vertical direction on the side surface of the traveling body.
　(7)　好ましくは、上記梯子は、一対の上記支柱の一方が上記アームの上記第２端部に支持されている。そして、上記梯子は、上記アームの姿勢が固定された状態において、上記走行体の前後方向に離間した第１位置及び第２位置の間を、上記第２回動軸線周りにさらに回動する。 (7) Preferably, in the ladder, one of a pair of the support columns is supported by the second end portion of the arm. The ladder further rotates around the second rotation axis between the first position and the second position separated in the front-rear direction of the traveling body in a state where the posture of the arm is fixed.
　(8)　本発明のさらに他の形態に係る作業車両は、前後方向に延びるレールが側面に設けられた走行体と、上記走行体上において、上記走行体の左右方向の幅に収まる第１状態、及び上記走行体から左右方向の少なくとも一方に張り出した第２状態に旋回可能な旋回体と、幅方向に離間した位置において各々が上下方向に延びる一対の支柱、及び上下方向に離間した位置において各々が上記幅方向に延びて一対の上記支柱に接続される複数の踏板で構成される梯子とを備える。そして、上記梯子は、上記レールに沿って上記走行体の前後方向に移動可能に、上記走行体に支持されている。 (8) A work vehicle according to still another embodiment of the present invention includes a traveling body in which a rail extending in the front-rear direction is provided on a side surface, and a first state that fits in a lateral width of the traveling body on the traveling body. And a revolving body that can turn in at least one of the left and right directions from the traveling body, a pair of struts extending in the vertical direction at positions separated in the width direction, and a position spaced in the vertical direction. And a ladder composed of a plurality of treads each extending in the width direction and connected to the pair of support columns. And the said ladder is supported by the said traveling body so that the movement to the front-back direction of the said traveling body is possible along the said rail.
　本発明によれば、旋回体の状態に応じて梯子を移動させることができるので、旋回体の状態によらず、乗降しやすい梯子を備えた作業車両を得ることができる。 According to the present invention, since the ladder can be moved according to the state of the turning body, it is possible to obtain a work vehicle equipped with a ladder that can easily get on and off regardless of the state of the turning body.
図１は、本実施形態に係るラフテレーンクレーン１０の外観斜視図である。FIG. 1 is an external perspective view of a rough terrain crane 10 according to the present embodiment. 図２は、図１の領域ＩＩの拡大図であって、（Ａ）は第１位置の梯子４０を、（Ｂ）は回動中の梯子４０を、（Ｃ）は第２位置の梯子４０を示す。2 is an enlarged view of region II in FIG. 1, (A) shows the ladder 40 in the first position, (B) shows the rotating ladder 40, and (C) shows the ladder 40 in the second position. Indicates. 図３は、係合部２６及び被係合部４８の拡大斜視図であって、（Ａ）は突出位置のロックピン４８Ａを、（Ｂ）は後退位置のロックピン４８Ａを示す。3A and 3B are enlarged perspective views of the engaging portion 26 and the engaged portion 48. FIG. 3A shows the lock pin 48A in the protruding position, and FIG. 3B shows the lock pin 48A in the retracted position. 図４は、変形例１に係る領域ＩＩの拡大図であって、（Ａ）は第１姿勢のアーム５０を、（Ｂ）は第２姿勢のアーム５０及び第２位置の梯子４０Ａを、（Ｃ）は第２姿勢のアーム５０及び第１位置の梯子４０Ａを示す。FIGS. 4A and 4B are enlarged views of the region II according to the modified example 1. FIG. 4A shows the arm 50 in the first posture, FIG. 4B shows the arm 50 in the second posture and the ladder 40A in the second position. C) shows the arm 50 in the second position and the ladder 40A in the first position. 図５は、変形例２に係る領域ＩＩの拡大図であって、（Ａ）は前方に移動された梯子４０Ｂを、（Ｂ）は後方に移動された梯子４０Ｂを示す。FIGS. 5A and 5B are enlarged views of the region II according to the modification 2. FIG. 5A shows the ladder 40B moved forward, and FIG. 5B shows the ladder 40B moved backward.
　以下、本発明の好ましい実施形態が、適宜図面が参照されつつ説明される。なお、本実施形態は、本発明の一態様にすぎず、本発明の要旨を変更しない範囲で実施態様が変更されてもよいことは言うまでもない。また、本実施形態では、鉛直方向を上下方向７と定義し、ラフテレーンクレーン１０の直進方向を前後方向８と定義し、上下方向７及び前後方向８と直交する方向を左右方向９と定義する。 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings as appropriate. In addition, this embodiment is only 1 aspect of this invention, and it cannot be overemphasized that an embodiment may be changed in the range which does not change the summary of this invention. In the present embodiment, the vertical direction is defined as the vertical direction 7, the straight direction of the rough terrain crane 10 is defined as the front-rear direction 8, and the direction perpendicular to the vertical direction 7 and the front-rear direction 8 is defined as the left-right direction 9. .
［ラフテレーンクレーン１０］
　本実施形態に係るラフテレーンクレーン１０は、図１に示されるように、下部走行体（走行体の一例）２０と、上部旋回体（旋回体の一例）３０と、梯子４０とを主に備える。ラフテレーンクレーン１０は、作業車両の一例である。但し、作業車両の具体例はラフテレーンクレーン１０に限定されず、例えば、オールテレーンクレーン、カーゴクレーン、高所作業車等であってもよい。 [Rough terrain crane 10]
As shown in FIG. 1, the rough terrain crane 10 according to the present embodiment mainly includes a lower traveling body (an example of a traveling body) 20, an upper turning body (an example of a rotating body) 30, and a ladder 40. . The rough terrain crane 10 is an example of a work vehicle. However, a specific example of the work vehicle is not limited to the rough terrain crane 10, and may be, for example, an all terrain crane, a cargo crane, an aerial work vehicle, or the like.
［下部走行体２０］
　下部走行体２０は、左右一対の前輪２１と、左右一対の後輪２２とを有する（図１では、右側のみを図示）。前輪２１及び後輪２２は、トランスミッション（図示省略）を介して伝達されるエンジン（図示省略）の駆動力によって回転される。但し、下部走行体２０は２軸に限定されず、３軸以上であってもよい。下部走行体２０は、後述するキャビン３４内に設置されたステアリング、アクセルペダル、ブレーキペダル等がオペレータによって操作されることによって走行する。 [Lower traveling body 20]
The lower traveling body 20 has a pair of left and right front wheels 21 and a pair of left and right rear wheels 22 (only the right side is shown in FIG. 1). The front wheels 21 and the rear wheels 22 are rotated by the driving force of an engine (not shown) transmitted via a transmission (not shown). However, the lower traveling body 20 is not limited to two axes, and may be three or more axes. The lower traveling body 20 travels when a steering wheel, an accelerator pedal, a brake pedal, and the like installed in a cabin 34 described later are operated by an operator.
　また、下部走行体２０は、アウトリガ２３、２４を有する。アウトリガ２３、２４は、下部走行体２０から左右方向９に張り出した位置において地面に接地する張出状態と、地面から離間した状態で下部走行体２０に格納される格納状態とに状態変化が可能である。上部旋回体３０の動作時にアウトリガ２３、２４を張出状態とすることにより、ラフテレーンクレーン１０の姿勢が安定する。一方、アウトリガ２３、２４は、下部走行体２０の走行時に格納状態とされる。 Also, the lower traveling body 20 has outriggers 23 and 24. The outriggers 23 and 24 can change state between an overhanging state where the outriggers 23 and 24 are grounded to the ground at a position protruding in the left-right direction 9 and a retracted state where the outriggers 23 and 24 are stored in the lower traveling body 20 while being separated from the ground. It is. By setting the outriggers 23 and 24 to the extended state during the operation of the upper swing body 30, the posture of the rough terrain crane 10 is stabilized. On the other hand, the outriggers 23 and 24 are placed in a retracted state when the lower traveling body 20 travels.
　さらに、下部走行体２０の右側面には、係合部２５、２６、２７が設けられている。係合部２５～２７は、前後方向８に離間した３箇所に等間隔に設けられている。係合部２５～２７それぞれには、図２及び図３に示されるように、上方に開口された凹部２５Ａ、２６Ａ、２７Ａが形成されている。凹部２５Ａ～２７Ａは、後述する被係合部４８、４９のロックピン４８Ａ、４９Ａを受け入れることによって、当該被係合部４８、４９を支持する。但し、係合部２５～２７は３箇所に限定されず、２箇所であってもよいし、４箇所以上であってもよい。 Furthermore, engaging portions 25, 26, and 27 are provided on the right side surface of the lower traveling body 20. The engaging portions 25 to 27 are provided at three equal intervals in the front-rear direction 8. As shown in FIGS. 2 and 3, concave portions 25A, 26A, and 27A opened upward are formed in the engaging portions 25 to 27, respectively. The recesses 25A to 27A support the engaged portions 48 and 49 by receiving lock pins 48A and 49A of the engaged portions 48 and 49 described later. However, the engagement portions 25 to 27 are not limited to three locations, and may be two locations or four or more locations.
［上部旋回体３０］
　上部旋回体３０は、旋回ベアリング（図示省略）を介して下部走行体２０に旋回可能に支持されている。上部旋回体３０は、伸縮ブーム３２と、フック３３と、キャビン３４とを主に備える。伸縮ブーム３２は、起伏及び伸縮可能に上部旋回体３０に支持されている。フック３３は、伸縮ブーム３２の先端部から下方に延出されたロープ３８に吊り下げられている。キャビン３４には、下部走行体２０を走行させるための前述の各種操作部、及び上部旋回体３０を動作させるための各種レバーや操作パネル等が設けられている。また、キャビン３４には、前後方向８における前輪２１及び後輪２２の概ね中央に、出入口３４Ａが設けられている。 [Upper turning body 30]
The upper turning body 30 is supported by the lower traveling body 20 through a turning bearing (not shown) so as to be turnable. The upper swing body 30 mainly includes a telescopic boom 32, a hook 33, and a cabin 34. The telescopic boom 32 is supported by the upper swing body 30 so as to be able to undulate and extend. The hook 33 is suspended from a rope 38 that extends downward from the distal end of the telescopic boom 32. The cabin 34 is provided with the above-described various operation units for causing the lower traveling body 20 to travel, and various levers and operation panels for operating the upper swing body 30. Further, the cabin 34 is provided with an entrance / exit 34 </ b> A substantially in the center of the front wheel 21 and the rear wheel 22 in the front-rear direction 8.
　上部旋回体３０は、下部走行体２０上において、図１の旋回範囲３０Ａ内を旋回する。図１に示される上部旋回体３０は、下部走行体２０の左右方向９の幅に収まる第１状態である。このとき、キャビン３４の出入口３４Ａは、ラフテレーンクレーン１０の右方を向く。一方、上部旋回体３０は、図１に示される第１状態から旋回することによって、下部走行体２０の左右方向９の少なくとも一方に張り出した第２状態となる。 The upper turning body 30 turns on the lower traveling body 20 in the turning range 30A of FIG. The upper turning body 30 shown in FIG. 1 is in a first state that fits in the width in the left-right direction 9 of the lower traveling body 20. At this time, the entrance 34 </ b> A of the cabin 34 faces the right side of the rough terrain crane 10. On the other hand, the upper swing body 30 is in the second state in which the lower swing body 20 projects in at least one of the left and right directions 9 by turning from the first state shown in FIG.
　一例として、図１に示される上部旋回体３０が９０°左旋回することによって、上部旋回体３０の前部が下部走行体２０の左側面から左方に張り出し、上部旋回体３０の後部が下部走行体２０の右側面から右方に張り出す。このとき、キャビン３４の出入口３４Ａは、ラフテレーンクレーン１０の前方を向く。他の例として、図１に示される上部旋回体３０が９０°右旋回することによって、上部旋回体３０の前部が下部走行体２０の右側面から右方に張り出し、上部旋回体３０の後部が下部走行体２０の左側面から左方に張り出す。このとき、キャビン３４の出入口３４Ａは、ラフテレーンクレーン１０の後方を向く。 As an example, when the upper swing body 30 shown in FIG. 1 turns left by 90 °, the front portion of the upper swing body 30 protrudes leftward from the left side surface of the lower traveling body 20, and the rear portion of the upper swing body 30 is lower. Projects to the right from the right side of the traveling body 20. At this time, the entrance 34 </ b> A of the cabin 34 faces the front of the rough terrain crane 10. As another example, when the upper swing body 30 shown in FIG. 1 turns right by 90 degrees, the front portion of the upper swing body 30 protrudes rightward from the right side surface of the lower traveling body 20, and the upper swing body 30 The rear part protrudes leftward from the left side surface of the lower traveling body 20. At this time, the entrance 34 </ b> A of the cabin 34 faces the rear of the rough terrain crane 10.
　上部旋回体３０は、旋回モータ（不図示）によって旋回される。伸縮ブーム３２は、起伏シリンダ３５によって起伏され、伸縮シリンダ（図示省略）によって伸縮される。伸縮ブーム３２は、箱型構造のブームに限定されず、ラチス構造のジブであってもよい。フック３３は、ウインチ（図示省略）によるロープ３８の巻き取り及び繰り出しによって昇降される。旋回モータ、起伏シリンダ、伸縮シリンダ、ウインチ、及びアウトリガ２３、２４を動作させるアクチュエータは、例えば、油圧式のアクチュエータである。すなわち、ラフテレーンクレーン１０は、供給する作動油の方向及び流量を制御することによって、各アクチュエータを駆動させる。但し、本発明のアクチュエータは油圧式に限定されず、電動式等であってもよい。 The upper turning body 30 is turned by a turning motor (not shown). The telescopic boom 32 is raised and lowered by a hoisting cylinder 35 and extended and retracted by an extending and retracting cylinder (not shown). The telescopic boom 32 is not limited to a box-type boom, and may be a lattice-type jib. The hook 33 is moved up and down by winding and unwinding the rope 38 by a winch (not shown). The actuator that operates the swing motor, the hoisting cylinder, the telescopic cylinder, the winch, and the outriggers 23 and 24 is, for example, a hydraulic actuator. That is, the rough terrain crane 10 drives each actuator by controlling the direction and flow rate of the hydraulic fluid to be supplied. However, the actuator of the present invention is not limited to a hydraulic type, and may be an electric type or the like.
［梯子４０］
　梯子４０は、下部走行体２０の側面（本実施形態では、右側面）に支持されている。梯子４０は、ラフテレーンクレーン１０のオペレータが下部走行体２０上（典型的には、キャビン３４）に乗降するために用いられる。図１に示される梯子４０は、上部旋回体３０が第１状態のときに、キャビン３４の出入口３４Ａの直下に配置されている。図１に示される梯子４０の位置は、第１位置の一例である。梯子４０は、図２に示されるように、一対の支柱４１、４２と、複数の踏板４３、４４、４５、４６、４７とを主に備える。 [Ladder 40]
The ladder 40 is supported on the side surface (right side surface in the present embodiment) of the lower traveling body 20. The ladder 40 is used by an operator of the rough terrain crane 10 to get on and off the lower traveling body 20 (typically, the cabin 34). The ladder 40 shown in FIG. 1 is disposed immediately below the entrance / exit 34A of the cabin 34 when the upper swing body 30 is in the first state. The position of the ladder 40 shown in FIG. 1 is an example of a first position. As shown in FIG. 2, the ladder 40 mainly includes a pair of support columns 41 and 42 and a plurality of tread plates 43, 44, 45, 46, and 47.
　支柱４１、４２は、梯子４０の幅方向に離間した位置において、各々が上下方向７に延設されている。踏板４３～４７は、一対の支柱４１、４２の間において、上下方向７に離間して配置されている。また、踏板４３～４７それぞれは、梯子４０の幅方向に延設されて、一対の支柱４１、４２に接続されている。なお、梯子４０の幅方向は、梯子４０が第１位置及び後述する第２位置のときに、走行体２０の前後方向８に一致する。 Each of the support columns 41 and 42 extends in the vertical direction 7 at a position separated in the width direction of the ladder 40. The tread plates 43 to 47 are spaced apart in the vertical direction 7 between the pair of support columns 41 and 42. In addition, each of the tread plates 43 to 47 extends in the width direction of the ladder 40 and is connected to a pair of support columns 41 and 42. The width direction of the ladder 40 coincides with the front-rear direction 8 of the traveling body 20 when the ladder 40 is in the first position and a second position described later.
　また、梯子４０は、被係合部４８、４９を備える。被係合部４８、４９は、支柱４１、４２に設けられている。より詳細には、被係合部４８は、支柱４１の上端で且つ幅方向の外側（支柱４２と反対側）に設けられている。また、被係合部４９は、支柱４２の上端で且つ幅方向の外側（支柱４１と反対側）に設けられている。なお、被係合部４８、４９の構成は共通するので、以下、被係合部４８についてのみ説明する。 Moreover, the ladder 40 includes engaged portions 48 and 49. The engaged portions 48 and 49 are provided on the support columns 41 and 42. More specifically, the engaged portion 48 is provided at the upper end of the support column 41 and on the outer side in the width direction (the side opposite to the support column 42). Further, the engaged portion 49 is provided on the upper end of the support column 42 and on the outer side in the width direction (the side opposite to the support column 41). In addition, since the structure of the to- be-engaged parts 48 and 49 is common, only the to-be-engaged part 48 is demonstrated below.
　被係合部４８は、図３に示されるように、ロックピン（凸部の一例）４８Ａと、コイルバネ（付勢部材の一例）４８Ｂとを主に備える。ロックピン４８Ａは、概ね円柱形状（水平断面が円形状）の外形を呈している。ロックピン４８Ａの外径寸法は、凹部２５Ａ～２７Ａの直径より小さい。そして、ロックピン４８Ａは、下方に突出した突出位置（図３（Ａ）参照）と、突出位置より上方に後退した後退位置（図３（Ｂ）参照）との間を移動可能である。コイルバネ４８Ｂは、ロックピン４８Ａを突出位置（すなわち、下方）に向けて付勢する。 As shown in FIG. 3, the engaged portion 48 mainly includes a lock pin (an example of a convex portion) 48A and a coil spring (an example of an urging member) 48B. The lock pin 48A has a substantially cylindrical outer shape (circular horizontal cross section). The outer diameter of the lock pin 48A is smaller than the diameter of the recesses 25A to 27A. The lock pin 48A is movable between a projecting position projecting downward (see FIG. 3A) and a retracted position retracting upward from the projecting position (see FIG. 3B). The coil spring 48B biases the lock pin 48A toward the protruding position (ie, downward).
　突出位置のロックピン４８Ａは、凹部２５Ａ～２７Ａの１つに進入することができる。凹部２５Ａ～２７Ａの１つに進入したロックピン４８Ａは、凹部２５Ａ～２７Ａを画定する壁面によって、走行体２０の前後方向８及び左右方向９への移動が規制されると共に、後述する回動軸線４８Ｅの周りに回動可能に支持される。一方、後退位置のロックピン４８Ｂは、凹部２５Ａ～２７Ａから退出する。 The lock pin 48A at the protruding position can enter one of the recesses 25A to 27A. The lock pin 48A that has entered one of the recesses 25A to 27A is restricted from moving in the front-rear direction 8 and the left-right direction 9 by the wall surface that defines the recesses 25A to 27A. It is rotatably supported around 48E. On the other hand, the lock pin 48B in the retracted position is retracted from the recesses 25A to 27A.
　また、ロックピン４８Ａには、ロックピン４８Ａの移動方向（すなわち、上下方向７）と交差する方向に突出する把持部４８Ｃが設けられている。把持部４８Ｃは、上下方向７に延びるスリット４８Ｄを通じて被係合部４８の外部に突出している。そして、ラフテレーンクレーン１０のオペレータがスリット４８Ｄに沿って把持部４８Ｃを持ち上げることによって、コイルバネ４８Ｂの付勢力に抗してロックピン４８Ａを突出位置から後退位置へ移動させることができる。 Also, the lock pin 48A is provided with a gripping portion 48C that protrudes in a direction that intersects the moving direction of the lock pin 48A (ie, the vertical direction 7). The grip portion 48C protrudes outside the engaged portion 48 through a slit 48D extending in the vertical direction 7. Then, when the operator of the rough terrain crane 10 lifts the gripping portion 48C along the slit 48D, the lock pin 48A can be moved from the protruding position to the retracted position against the urging force of the coil spring 48B.
　梯子４０は、図２（Ａ）に示されるように、３箇所の係合部２５～２７のうち、中央の係合部２６の凹部２６Ａにロックピン４８Ａが進入し、後方の係合部２７の凹部２７Ａにロックピン４９Ａが進入することによって、第１位置において下部走行体２０に固定される。第１位置の梯子４０は、梯子４０の幅方向を走行体２０の前後方向８に一致させた状態で走行体２０に固定される。すなわち、オペレータは、上部旋回体３０が第１状態のときに、第１位置の梯子４０を通じてキャビン３４に乗降することができる。 As shown in FIG. 2A, in the ladder 40, the lock pin 48A enters the recess 26A of the center engaging portion 26 among the three engaging portions 25 to 27, and the rear engaging portion 27 is inserted. When the lock pin 49A enters the recess 27A, the lower traveling body 20 is fixed at the first position. The ladder 40 at the first position is fixed to the traveling body 20 in a state where the width direction of the ladder 40 coincides with the front-rear direction 8 of the traveling body 20. That is, the operator can get on and off the cabin 34 through the ladder 40 at the first position when the upper swing body 30 is in the first state.
　また、梯子４０は、図２（Ｂ）に示されるように、ロックピン４８Ａが凹部２６Ａに進入し、ロックピン４９Ａが凹部２７Ａから退出することによって、回動軸線４８Ｅの周りに回動する。回動軸線４８Ｅは、ロックピン４８Ａの径方向の中心位置を通って、上下方向７に延びる仮想線である。すなわち、図２（Ｂ）に示される梯子４０は、図２（Ａ）に示される第１位置と、図２（Ｃ）に示される第２位置との間を回動することができる。 Further, as shown in FIG. 2 (B), the ladder 40 rotates around the rotation axis 48E when the lock pin 48A enters the recess 26A and the lock pin 49A retracts from the recess 27A. The rotation axis 48E is an imaginary line extending in the vertical direction 7 through the radial center position of the lock pin 48A. That is, the ladder 40 shown in FIG. 2 (B) can rotate between the first position shown in FIG. 2 (A) and the second position shown in FIG. 2 (C).
　さらに、梯子４０は、図２（Ｃ）に示されるように、３箇所の係合部２５～２７のうち、中央の係合部２６の凹部２６Ａにロックピン４８Ａが進入し、前方の係合部２５の凹部２５Ａにロックピン４９Ａが進入することによって、第２位置において下部走行体２０に固定される。第２位置の梯子４０は、例えば、第２状態の上部旋回体３０より前方の位置において、梯子４０の幅方向を走行体２０の前後方向８に一致させた状態で走行体２０に固定される。すなわち、オペレータは、上部旋回体３０が第２状態のときに、第２位置の梯子４０を通じてキャビン３４に乗降することができる。 Further, as shown in FIG. 2 (C), the ladder 40 has a lock pin 48A that enters the recess 26A of the central engaging portion 26 among the three engaging portions 25 to 27, and the front engaging portion is engaged. When the lock pin 49A enters the recess 25A of the portion 25, the lock pin 49A is fixed to the lower traveling body 20 at the second position. For example, the ladder 40 in the second position is fixed to the traveling body 20 in a state in which the width direction of the ladder 40 coincides with the front-rear direction 8 of the traveling body 20 at a position in front of the upper swing body 30 in the second state. . That is, the operator can get on and off the cabin 34 through the ladder 40 at the second position when the upper swing body 30 is in the second state.
［本実施形態の作用効果］
　上記の実施形態によれば、上部旋回体３０が第１状態のときは第１位置の梯子４０を通じて昇降し、上部旋回体３０が左旋回して第２状態になったときは第２位置の梯子４０を通じて昇降すればよい。これにより、上部旋回体３０の状態によらず、キャビン３４に乗降しやすい梯子４０を備えたラフテレーンクレーン１０を得ることができる。換言すれば、上部旋回体３０を第１状態に戻さなくても梯子４０を乗降することができるので、ラフテレーンクレーン１０の作業効率が向上する。 [Operational effects of this embodiment]
According to the above embodiment, when the upper swing body 30 is in the first state, the upper swing body 30 is moved up and down through the ladder 40 in the first position, and when the upper swing body 30 is turned to the left and turned into the second state, the ladder in the second position. What is necessary is just to go up and down through 40. Thereby, the rough terrain crane 10 provided with the ladder 40 which is easy to get on and off the cabin 34 can be obtained regardless of the state of the upper swing body 30. In other words, it is possible to get on and off the ladder 40 without returning the upper swing body 30 to the first state, so that the working efficiency of the rough terrain crane 10 is improved.
　なお、上記の実施形態では、ロックピン４８Ａの位置を通る回動軸線４８Ｅ周りに梯子４０を回動させる例を説明したが、梯子４０の回動中心はロックピン４８Ａの位置に限定されない。梯子４０は、ロックピン４８Ａが凹部２６Ａから退出し、ロックピン４９Ａが凹部２７Ａに進入することによって、ロックピン４９Ａの位置を通って上下方向７に延びる回動軸線周りにも回動することができる。すなわち、梯子４０は、一対の支柱４１、４２の一方側において上下方向７に延びる回動軸線周りに回動することができる。 In the above embodiment, the example in which the ladder 40 is rotated around the rotation axis 48E passing through the position of the lock pin 48A has been described. However, the rotation center of the ladder 40 is not limited to the position of the lock pin 48A. The ladder 40 can also rotate around a rotation axis extending in the vertical direction 7 through the position of the lock pin 49A when the lock pin 48A retreats from the recess 26A and the lock pin 49A enters the recess 27A. it can. That is, the ladder 40 can rotate around a rotation axis extending in the vertical direction 7 on one side of the pair of support columns 41 and 42.
　上記構成によれば、図２（Ａ）に示される第１位置よりさらに後方、或いは図２（Ｃ）に示される第２位置よりさらに前方に梯子４０を移動させることができる。この場合において、係合部２５の前方及び係合部２７の後方に係合部をさらに設けてもよい。これにより、各位置において梯子４０を安定して支持することができる。一方、前輪２１或いは後輪２２の位置と重なることによって、係合部２５の前方及び係合部２７の後方に係合部がさらに設けられない場合、梯子４０は、第１位置より後方或いは第２位置より前方の位置において、片持ち支持されてもよい。 According to the above configuration, the ladder 40 can be moved further rearward than the first position shown in FIG. 2A or further forward than the second position shown in FIG. In this case, an engaging portion may be further provided in front of the engaging portion 25 and behind the engaging portion 27. Thereby, the ladder 40 can be stably supported at each position. On the other hand, when the engaging portion is not further provided in front of the engaging portion 25 and behind the engaging portion 27 by overlapping with the position of the front wheel 21 or the rear wheel 22, the ladder 40 is positioned rearward or first from the first position. It may be cantilevered at a position ahead of the two positions.
　第１位置よりさらに後方の梯子４０は、図１に示される上部旋回体３０が右旋回して第２状態になったときに、キャビン３４に乗降しやすい位置である。すなわち、第１位置よりさらに後方の梯子４０の位置は、キャビン３４の出入口３４Ａが後方を向くときに、上部旋回体３０より後方の第２位置の他の例である。このように、第１位置及び第２位置は、前後方向８に離間していれば、どちらが前方であってもよい。 The ladder 40 further rearward than the first position is a position where the upper swing body 30 shown in FIG. 1 is easily turned on and off the cabin 34 when the upper swing body 30 turns right and enters the second state. That is, the position of the ladder 40 further rearward than the first position is another example of the second position rearward of the upper swing body 30 when the entrance / exit 34A of the cabin 34 faces rearward. Thus, as long as the 1st position and the 2nd position are spaced apart in the front-back direction 8, either may be ahead.
　なお、上記の実施形態では、前後方向８における前輪２１及び後輪２２の概ね中央の位置を第１位置とした例を説明したが、第１位置はこれに限定されない。例えば、フロントアクスルが２軸の作業車両において、上部旋回体３０が第１状態のときの出入口３４Ａは、フロントアクスルの後方側の車輪の直上に位置する場合がある。この場合の第１位置は、前後方向８において、フロントアクスルの後方側の車輪と重なる位置（すなわち、出入口３４Ａの直下）であってもよい。 In the above-described embodiment, an example in which the position of the center of the front wheel 21 and the rear wheel 22 in the front-rear direction 8 is the first position has been described, but the first position is not limited to this. For example, in a work vehicle having a two-axle front axle, the entrance / exit 34A when the upper-part turning body 30 is in the first state may be located immediately above the wheel on the rear side of the front axle. In this case, the first position may be a position that overlaps the wheel on the rear side of the front axle in the front-rear direction 8 (that is, directly below the entrance / exit 34A).
　また、上記の実施形態では、被係合部４８、４９（すなわち、回動軸線）を支柱４１、４２の外側に設けたので、梯子４０の回動半径を大きくすることができる。その結果、第１位置及び第２位置が離れるので、第２状態の上部旋回体３０を避けた位置に梯子４０を配置しやすくなる。但し、回動軸線の位置は上記の例に限定されず、支柱４１、４２の位置であってもよいし、支柱４１、４２の間の位置であってもよい。 In the above-described embodiment, the engaged portions 48 and 49 (that is, the rotation axis) are provided outside the support columns 41 and 42, so that the turning radius of the ladder 40 can be increased. As a result, since the first position and the second position are separated from each other, the ladder 40 can be easily disposed at a position avoiding the upper swing body 30 in the second state. However, the position of the rotation axis is not limited to the above example, and may be the position of the columns 41 and 42 or the position between the columns 41 and 42.
　また、上記構成によれば、コイルバネ４８Ｂの付勢力及び重力によってロックピン４８Ａが突出位置に保持されるので、ロックピン４８Ａが凹部２６Ａから意図せずに退出するのを抑制できる。その結果、下部走行体２０の走行中やオペレータの乗降中に梯子４０が下部走行体２０から脱落するのを抑制できる。 Further, according to the above configuration, the lock pin 48A is held at the protruding position by the urging force and gravity of the coil spring 48B, so that the lock pin 48A can be prevented from unintentionally leaving the recess 26A. As a result, it is possible to suppress the ladder 40 from falling off the lower traveling body 20 while the lower traveling body 20 is traveling or when the operator gets on and off.
　但し、係合部２５～２７及び被係合部４８、４９の構成は上記の実施形態の例に限定されない。例えば、下部走行体２０の前後方向８の少なくとも３箇所にロックピンが設けられ、一対の支柱４１、４２それぞれに凹部が設けられていてもよい。この場合のロックピンは、上方に突出した突出位置と、突出位置より下方の後退位置との間を移動する。また、この場合の凹部は、下方に開口されている。その他の構成は上記の実施形態と共通するので、再度の説明は省略する。 However, the configuration of the engaging portions 25 to 27 and the engaged portions 48 and 49 is not limited to the example of the above embodiment. For example, lock pins may be provided in at least three places in the front-rear direction 8 of the lower traveling body 20, and recesses may be provided in the pair of support columns 41 and 42, respectively. In this case, the lock pin moves between a protruding position protruding upward and a retracted position below the protruding position. Further, the recess in this case is opened downward. Other configurations are the same as those in the above-described embodiment, and thus the description thereof is omitted.
　また、上記の実施形態では、被係合部４８、４９を支柱４１、４２の上端にのみ設けた例を説明したが、被係合部４８、４９の位置はこれに限定されず、支柱４１、４２の中間に設けてもよいし、支柱４１、４２の上端及び下端の２箇所に設けてもよい。また、上記の実施形態では、下部走行体２０の側面に梯子４０が取り付けられた例を説明したが、梯子４０が下部走行体２０の側面の一部を構成してもよい。 In the above embodiment, the example in which the engaged portions 48 and 49 are provided only at the upper ends of the columns 41 and 42 has been described. However, the positions of the engaged portions 48 and 49 are not limited thereto, and the columns 41 are not limited thereto. , 42 may be provided in the middle, or may be provided at two places, the upper end and the lower end of the support columns 41, 42. In the above embodiment, the example in which the ladder 40 is attached to the side surface of the lower traveling body 20 has been described. However, the ladder 40 may constitute a part of the side surface of the lower traveling body 20.
　また、上記の実施形態では、梯子４０の回動、及びロックピン４８Ａ、４９Ｂの進退をオペレータが手動で行う例を説明したが、本発明はこれに限定されない。すなわち、ラフテレーンクレーン１０は、梯子４０を回動させるアクチュエータと、ロックピン４８Ａ、４９Ａを進退させるアクチュエータと、各アクチュエータを制御する制御部とを備えてもよい。 In the above embodiment, the example in which the operator manually turns the ladder 40 and moves the lock pins 48A and 49B is described, but the present invention is not limited to this. That is, the rough terrain crane 10 may include an actuator that rotates the ladder 40, an actuator that moves the lock pins 48A and 49A forward and backward, and a control unit that controls each actuator.
　さらに、梯子４０を前後方向８に移動させるための構成は、上記の実施形態の例に限定されない。以下、図４及び図５を参照して、変形例１、２を説明する。なお、上記の実施形態との共通点の詳細な説明は省略し、相違点を中心に説明するものとする。変形例１、２は、梯子４０を支持する構造が上記の実施形態と相違し、その他の点は上記の実施形態と共通する。 Furthermore, the configuration for moving the ladder 40 in the front-rear direction 8 is not limited to the example of the above embodiment. Hereinafter, Modifications 1 and 2 will be described with reference to FIGS. 4 and 5. A detailed description of points common to the above embodiment will be omitted, and differences will be mainly described. Modifications 1 and 2 differ from the above embodiment in the structure for supporting the ladder 40, and the other points are common to the above embodiment.
［変形例１］
　変形例１に係るラフテレーンクレーン１０は、図４に示されるように、長尺棒状のアーム５０をさらに備える。また、変形例１に係る走行体２０の側面には、前後方向８に離間した少なくとも２箇所に、係合部２５、２６が設けられている。なお、前後方向８における係合部２５、２６の間隔は、上記の実施形態より長く（概ね２倍に）設定されている。さらに、変形例１に係る梯子４０Ａは、一対の支柱４１、４２の一方（図４の例では、支柱４１）のみに、被係合部４８が設けられている。 [Modification 1]
The rough terrain crane 10 which concerns on the modification 1 is further provided with the elongate bar-shaped arm 50, as FIG. 4 shows. In addition, on the side surface of the traveling body 20 according to the first modification, engagement portions 25 and 26 are provided at at least two places separated in the front-rear direction 8. Note that the interval between the engaging portions 25 and 26 in the front-rear direction 8 is set to be longer (approximately twice) than in the above embodiment. Furthermore, in the ladder 40A according to the first modification, the engaged portion 48 is provided only on one of the pair of columns 41 and 42 (column 41 in the example of FIG. 4).
　アーム５０は、例えば、下部走行体２０及び上部旋回体３０の間に配置されている。アーム５０は、第１回動軸線５１Ａ周りに回動可能に下部走行体２０に支持された第１端部５１と、第１端部５１より下部走行体２０の右側面に近い位置に配置された第２端部５２とを有する。第１回動軸線５１Ａは、第１端部５１を通って上下方向７に延びる仮想線である。アーム５０は、第１回動軸線５１Ａ周りに回動することによって、第２端部５２が第１端部５１より後方に位置する第１姿勢（図４（Ａ）参照）と、第２端部５２が第１端部５１より前方に位置する第２姿勢（図４（Ｂ）、（Ｃ）参照）とに姿勢変化する。 The arm 50 is disposed between the lower traveling body 20 and the upper swing body 30, for example. The arm 50 is disposed at a position closer to the right side surface of the lower traveling body 20 than the first end 51, and is supported by the lower traveling body 20 so as to be rotatable about the first rotation axis 51A. And a second end 52. The first rotation axis 51 </ b> A is a virtual line that extends in the vertical direction 7 through the first end 51. The arm 50 rotates around the first rotation axis 51A, whereby the second end 52 is positioned behind the first end 51 (see FIG. 4A) and the second end. The posture of the portion 52 is changed to the second posture (see FIGS. 4B and 4C) located in front of the first end portion 51.
　梯子４０Ａの支柱４１は、ロックピン４８Ａが凹部２５Ａ、２６Ａの１つに進入することによって、係合部２５、２６に支持される。一方、梯子４０Ａの支柱４２は、第２回動軸線５２Ａ周りに回動可能に第２端部５２に支持される。第２回動軸線５２Ａは、第２端部５２を通って上下方向７に延びる仮想線である。すなわち、変形例１に係る梯子４０Ａは、一対の支柱４１、４２のうちの一方側が係合部２５、２６の１つに支持され、他方側がアーム５０の第２端部５２に回動可能に支持される。 The strut 41 of the ladder 40A is supported by the engaging portions 25 and 26 when the lock pin 48A enters one of the recesses 25A and 26A. On the other hand, the column 42 of the ladder 40A is supported by the second end 52 so as to be rotatable around the second rotation axis 52A. The second rotation axis 52 </ b> A is a virtual line that extends in the vertical direction 7 through the second end 52. That is, in the ladder 40A according to the first modification, one side of the pair of support columns 41 and 42 is supported by one of the engaging portions 25 and 26, and the other side can be rotated by the second end portion 52 of the arm 50. Supported.
　より詳細には、支柱４１の被係合部４８は、図４（Ａ）に示されるように、アーム５０が第１姿勢のときに係合部２６に支持される。また、ロックピン４８Ａを凹部２６Ａから退出させて、アーム５０を第１姿勢から第２姿勢へ回動させると、第２端部５２に支持された梯子４０Ａも前方に移動される。そして、支柱４１の被係合部４８は、図４（Ｂ）に示されるように、アーム５０が第２姿勢のときに係合部２５に支持される。 More specifically, the engaged portion 48 of the support column 41 is supported by the engaging portion 26 when the arm 50 is in the first posture, as shown in FIG. Further, when the lock pin 48A is retracted from the recess 26A and the arm 50 is rotated from the first posture to the second posture, the ladder 40A supported by the second end portion 52 is also moved forward. Then, the engaged portion 48 of the support column 41 is supported by the engaging portion 25 when the arm 50 is in the second posture, as shown in FIG.
　さらに、梯子４０Ａは、被係合部４８のロックピン４８Ａを凹部２５Ａから退出させることによって、アーム５０を第２姿勢に固定した状態で、第２回動軸線５２Ａ周りに回動可能になる。そして、図４（Ｂ）に示される梯子４０Ａを１８０°回動させることによって、支柱４１の被係合部４８は、図４（Ｃ）に示されるように、係合部２６に支持される。図４（Ｃ）に示される梯子４０Ａの位置は第１位置の一例であり、図４（Ｂ）に示される梯子４０Ａの位置は第２位置の一例である。 Furthermore, the ladder 40A can be rotated around the second rotation axis 52A in a state where the arm 50 is fixed in the second posture by retracting the lock pin 48A of the engaged portion 48 from the recess 25A. Then, by rotating the ladder 40A shown in FIG. 4B by 180 °, the engaged portion 48 of the support column 41 is supported by the engaging portion 26 as shown in FIG. 4C. . The position of the ladder 40A shown in FIG. 4C is an example of the first position, and the position of the ladder 40A shown in FIG. 4B is an example of the second position.
　変形例１によれば、第１回動軸線５１Ａ周りに回動するアーム５０の第２端部５２で梯子４０Ａを支持することによって、前後方向８における梯子４０Ａの移動距離を長くすることができる。また、アーム５０の姿勢を固定した状態で第２回動軸線５２Ａ周りに梯子４０Ａを回動させることによって、図４（Ａ）に示される梯子４０Ａの位置と、図４（Ｂ）に示される梯子４０Ａの位置との間に、さらに梯子４０Ａを配置することができる。その結果、上部旋回体３０の状態に応じて乗降しやすい位置に、梯子４０Ａをさらに配置しやすくなる。 According to the first modification, by supporting the ladder 40A by the second end 52 of the arm 50 that rotates around the first rotation axis 51A, the moving distance of the ladder 40A in the front-rear direction 8 can be increased. . Further, by rotating the ladder 40A around the second rotation axis 52A with the posture of the arm 50 fixed, the position of the ladder 40A shown in FIG. 4A and the position shown in FIG. 4B are shown. A ladder 40A can be further disposed between the position of the ladder 40A. As a result, the ladder 40 </ b> A can be further easily arranged at a position where the passenger can easily get on and off according to the state of the upper swing body 30.
［変形例２］
　変形例２に係るラフテレーンクレーン１０は、図５に示されるように、走行体２０の側面に前後方向８に延びるレール２８、２９を備える。レール２８、２９は、上下方向７に離間して配置されている。また、変形例２に係る梯子４０Ｂは、レール２８に係合される被係合部４１Ａ、４２Ａと、レール２９に係合される被係合部４１Ｂ、４２Ｂを有する。被係合部４１Ａ、４１Ｂは上下方向７に離間した位置において支柱４１に設けられ、被係合部４２Ａ、４２Ｂは上下方向７に離間した位置において支柱４２に設けられている。 [Modification 2]
The rough terrain crane 10 which concerns on the modification 2 is equipped with the rails 28 and 29 extended in the front-back direction 8 on the side surface of the traveling body 20, as FIG. 5 shows. The rails 28 and 29 are spaced apart in the vertical direction 7. The ladder 40 </ b> B according to the modification 2 includes engaged portions 41 </ b> A and 42 </ b> A that are engaged with the rail 28 and engaged portions 41 </ b> B and 42 </ b> B that are engaged with the rail 29. The engaged portions 41A and 41B are provided on the column 41 at positions spaced apart in the vertical direction 7, and the engaged portions 42A and 42B are provided on the column 42 at positions spaced apart in the vertical direction 7.
　梯子４０Ｂは、被係合部４１Ａ～４２Ｂがレール２８、２９に係合されることによって、下部走行体２０の側面に支持される。また、梯子４０Ｂは、被係合部４１Ａ～４２Ｂがレール２８、２９に案内されることによって、レール２８、２９に沿って下部走行体２０の前後方向８に移動することができる。変形例２によれば、梯子４０Ｂの位置を連続的に変化させることができるので、上部旋回体３０の状態に応じて乗降しやすい位置に、梯子４０Ｂをさらに配置しやすくなる。 The ladder 40B is supported on the side surface of the lower traveling body 20 by the engaged portions 41A to 42B being engaged with the rails 28 and 29. Further, the ladder 40B can move in the front-rear direction 8 of the lower traveling body 20 along the rails 28 and 29 by the engaged portions 41A to 42B being guided by the rails 28 and 29. According to the second modification, the position of the ladder 40B can be continuously changed, so that the ladder 40B can be more easily arranged at a position where the passenger can easily get on and off according to the state of the upper swing body 30.
１０・・・ラフテレーンクレーン
２０・・・下部走行体
２３，２４・・・アウトリガ
２５，２６，２７・・・係合部
２８，２９・・・レール
３０・・・上部旋回体
４０，４０Ａ，４０Ｂ・・・梯子
４１，４２・・・支柱
４３，４４，４５，４６，４７・・・踏板
４８，４９・・・被係合部
５０・・・アーム
５１・・・第１端部
５２・・・第２端部 DESCRIPTION OF SYMBOLS 10 ... Rough terrain crane 20 ... Lower traveling body 23, 24 ... Outrigger 25, 26, 27 ... Engagement part 28, 29 ... Rail 30 ... Upper turning body 40, 40A, 40B ... Ladder 41, 42 ... Posts 43, 44, 45, 46, 47 ... Tread 48, 49 ... Engaged portion 50 ... Arm 51 ... First end 52 ..Second end

Claims (8)

  1. 　走行体と、
    　上記走行体上において、上記走行体の左右方向の幅に収まる第１状態、及び上記走行体から左右方向の少なくとも一方に張り出した第２状態に旋回可能な旋回体と、
    　幅方向に離間した位置において各々が上下方向に延びる一対の支柱、及び上下方向に離間した位置において各々が上記幅方向に延びて一対の上記支柱に接続される複数の踏板で構成される梯子とを備えており、
    　上記梯子は、上記走行体の側面において、上記走行体の前後方向に離間した第１位置及び第２位置の間を、一対の上記支柱の一方側において上下方向に延びる回動軸線周りに回動する作業車両。     A traveling body,
    On the traveling body, a revolving body capable of turning into a first state that fits in a lateral width of the traveling body and a second state that protrudes from the traveling body in at least one of the lateral direction;
    A pair of struts each extending in the vertical direction at positions spaced apart in the width direction, and a ladder composed of a plurality of treads each extending in the width direction and connected to the pair of struts at positions spaced apart in the vertical direction; With
    The ladder rotates on a side surface of the traveling body between a first position and a second position that are separated from each other in the front-rear direction of the traveling body around a rotational axis that extends in the vertical direction on one side of the pair of support columns. Work vehicle.
  2. 　上記走行体には、前後方向に離間した少なくとも３箇所に凹部が設けられており、
    　一対の上記支柱には、上記凹部に対して上下方向に進退可能な凸部が設けられており、
    　上記梯子は、
    　中央及び後方の上記凹部に上記凸部が進入した上記第１位置と、
    　前方及び中央の上記凹部に上記凸部が進入した上記第２位置とにおいて、上記走行体に固定され、
    　一対の上記凸部の一方のみが上記凹部に進入した状態で、当該凸部の位置を通る上記回動軸線周りに回動する請求項１に記載の作業車両。     The traveling body is provided with recesses in at least three places separated in the front-rear direction,
    The pair of struts is provided with a convex portion that can advance and retreat in the vertical direction with respect to the concave portion,
    The above ladder is
    The first position where the convex portion enters the concave portion at the center and the rear,
    At the second position where the convex portion has entered the concave portion at the front and the center, it is fixed to the traveling body,
    The work vehicle according to claim 1, wherein only one of the pair of convex portions rotates around the rotational axis passing through the position of the convex portion in a state where the convex portion has entered the concave portion.
  3. 　一対の上記支柱には、凹部が設けられており、
    　上記走行体には、前後方向に離間した少なくとも３箇所に、上記凹部に対して上下方向に進退可能な凸部が設けられており、
    　上記梯子は、
    　中央及び後方の上記凸部が上記凹部に進入した上記第１位置と、
    　前方及び中央の上記凸部が上記凹部に進入した上記第２位置とにおいて、上記走行体に固定され、
    　一対の上記凹部の一方のみに上記凸部が進入した状態で、当該凹部の位置を通る上記回動軸線周りに回動する請求項１に記載の作業車両。     The pair of support columns is provided with a recess,
    The traveling body is provided with convex portions that can advance and retreat in the vertical direction with respect to the concave portions in at least three places separated in the front-rear direction.
    The above ladder is
    The first position where the convex part at the center and the rear has entered the concave part,
    The front and center convex portions are fixed to the traveling body at the second position where the convex portions enter the concave portions,
    2. The work vehicle according to claim 1, wherein the work vehicle rotates around the rotation axis passing through the position of the concave portion in a state where the convex portion enters only one of the pair of concave portions.
  4. 　上記凸部は、
    　上記凹部に進入する突出位置と、
    　上記突出位置より後退して、上記凹部から退出する後退位置との間を移動可能であり、
    　該作業車両は、上記突出位置へ向けて上記凸部を付勢する付勢部材を備える請求項２又は３に記載の作業車両。     The convex part is
    A protruding position to enter the recess,
    It is possible to move between the retracted position retracted from the projecting position and retracted from the recess,
    The work vehicle according to claim 2, further comprising a biasing member that biases the convex portion toward the protruding position.
  5. 　上記旋回体は、該作業車両のオペレータが搭乗するキャビンを備えており、
    　上記第１位置は、上記第１状態の上記旋回体の上記キャビンの出入口の直下であり、
    　上記第２位置は、上記キャビンの出入口が前方を向く上記第２状態の上記旋回体より前方の位置である請求項１から４のいずれかに記載の作業車両。     The revolving structure includes a cabin on which an operator of the work vehicle is boarded,
    The first position is directly below the entrance of the cabin of the swivel body in the first state,
    5. The work vehicle according to claim 1, wherein the second position is a position in front of the revolving structure in the second state in which an entrance of the cabin faces forward. 6.
  6. 　走行体と、
    　上記走行体上において、上記走行体の左右方向の幅に収まる第１状態、及び上記走行体から左右方向の少なくとも一方に張り出した第２状態に旋回可能な旋回体と、
    　幅方向に離間した位置において各々が上下方向に延びる一対の支柱、及び上下方向に離間した位置において各々が上記幅方向に延びて一対の上記支柱に接続される複数の踏板で構成される梯子と、
    　上下方向に延びる第１回動軸線周りに回動可能に上記走行体に支持された第１端部、及び上記第１端部より上記走行体の側面に近い位置に配置された第２端部を有するアームとを備えており、
    　上記アームは、
    　上記第２端部が上記第１端部より後方に位置する第１姿勢と、
    　上記第２端部が上記第１端部より前方に位置する第２姿勢との間を回動し、
    　上記梯子は、上記走行体の側面において、上下方向に延びる第２回動軸線周りに回動可能に、上記アームの上記第２端部に支持されている作業車両。     A traveling body,
    On the traveling body, a revolving body capable of turning into a first state that fits in a lateral width of the traveling body and a second state that protrudes from the traveling body in at least one of the lateral direction;
    A pair of struts each extending in the vertical direction at positions spaced apart in the width direction, and a ladder composed of a plurality of treads each extending in the width direction and connected to the pair of struts at positions spaced apart in the vertical direction; ,
    A first end that is supported by the traveling body so as to be rotatable about a first rotation axis that extends in the vertical direction, and a second end that is disposed closer to the side surface of the traveling body than the first end. And an arm having
    The arm
    A first posture in which the second end is located behind the first end;
    The second end rotates between a second posture positioned forward of the first end,
    The ladder is a work vehicle supported on the second end portion of the arm so as to be rotatable around a second rotation axis extending in a vertical direction on a side surface of the traveling body.
  7. 　上記梯子は、
    　一対の上記支柱の一方が上記アームの上記第２端部に支持されており、
    　上記アームの姿勢が固定された状態において、上記走行体の前後方向に離間した第１位置及び第２位置の間を、上記第２回動軸線周りにさらに回動する請求項６に記載の作業車両。     The above ladder is
    One of the pair of support columns is supported by the second end of the arm;
    The work according to claim 6, further rotating around the second rotation axis between a first position and a second position separated in the front-rear direction of the traveling body in a state where the posture of the arm is fixed. vehicle.
  8. 　前後方向に延びるレールが側面に設けられた走行体と、
    　上記走行体上において、上記走行体の左右方向の幅に収まる第１状態、及び上記走行体から左右方向の少なくとも一方に張り出した第２状態に旋回可能な旋回体と、
    　幅方向に離間した位置において各々が上下方向に延びる一対の支柱、及び上下方向に離間した位置において各々が上記幅方向に延びて一対の上記支柱に接続される複数の踏板で構成される梯子とを備えており、
    　上記梯子は、上記レールに沿って上記走行体の前後方向に移動可能に、上記走行体に支持されている作業車両。     A traveling body provided with rails extending in the front-rear direction on the side surface;
    On the traveling body, a revolving body capable of turning into a first state that fits in a lateral width of the traveling body and a second state that protrudes from the traveling body in at least one of the lateral direction;
    A pair of struts each extending in the vertical direction at positions spaced apart in the width direction, and a ladder composed of a plurality of treads each extending in the width direction and connected to the pair of struts at positions spaced apart in the vertical direction; With
    The work vehicle supported by the traveling body so that the ladder is movable in the front-rear direction of the traveling body along the rail.
PCT/JP2016/067760 2015-08-04 2016-06-15 Working vehicle WO2017022336A1 (en)

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JP6993204B2 (en) * 2017-12-15 2022-01-13 日本車輌製造株式会社 Transport vehicle
JP7031385B2 (en) 2018-03-09 2022-03-08 株式会社タダノ crane
JP6848905B2 (en) 2018-03-09 2021-03-24 株式会社タダノ crane
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