WO2017002160A1 - アクセスシステムおよび作業車両 - Google Patents
アクセスシステムおよび作業車両 Download PDFInfo
- Publication number
- WO2017002160A1 WO2017002160A1 PCT/JP2015/068664 JP2015068664W WO2017002160A1 WO 2017002160 A1 WO2017002160 A1 WO 2017002160A1 JP 2015068664 W JP2015068664 W JP 2015068664W WO 2017002160 A1 WO2017002160 A1 WO 2017002160A1
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- WO
- WIPO (PCT)
- Prior art keywords
- handrail
- lifting device
- access system
- main body
- device body
- Prior art date
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Classifications
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- 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
- B60R3/005—Catwalks, running boards for vehicle tops, access means for vehicle tops; Handrails therefor
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/16—Cabins, platforms, or the like, for drivers
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- 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
- 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
- B60R3/02—Retractable steps or ladders, e.g. movable under shock
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/08—Superstructures; Supports for superstructures
- E02F9/0833—Improving access, e.g. for maintenance, steps for improving driver's access, handrails
Definitions
- the present invention relates to an access system and a work vehicle having the access system.
- the access system includes a retractable lifting device (such as a ladder).
- Patent Document 1 JP-T-2008-546576
- the access system described in the above publication has an access staircase, a handrail, and a handrail.
- a handrail is attached to the access stairs.
- the handrail is attached to the vehicle body of the work vehicle.
- the access stairs can be rotated between the posture during use and the posture during storage.
- the access stairs are inclined with respect to the horizontal plane when used, and are raised when stored.
- the access stairs handrail and the body side handrail are superimposed in the side view of the access stairs. This protects the operator who goes up and down the access stairs.
- the height of the handrail in the vertical direction is lower than the height of the handrail when the access staircase has a large inclination angle.
- the height of the handrail is low as viewed from the operator ascending / descending the access stairs, making it difficult for the operator to grip the handrail.
- the height of the handrail increases, it is necessary to extend the handrail on the vehicle body side to the handrail side in order to superimpose the handrail on the handrail in a side view.
- An object of the present invention is to provide an access system and a work vehicle having an access system that can suppress interference even when the inclination angle of the lifting device main body in a use state is shallow with respect to a horizontal plane.
- the access system of the present invention includes a support member, a lifting device body, a handrail, and a handrail.
- the support member includes a main frame.
- the lifting device main body has a first end and a second end, and is supported by the support member so as to be rotatable about the rotation axis at the first end, and the second end is below the first end.
- the handrail is supported by a support member.
- the handrail is attached to the lifting device main body and extends toward the handrail from the position of the rotary shaft in the direction from the second end portion to the first end portion when in the use posture in a side view of the lifting device body. Has a part.
- the handrail has a portion extending to the handrail side from the position of the rotating shaft. For this reason, even if the inclination angle of the lifting device body with respect to the horizontal plane is reduced and the handrail needs to be increased, the handrail is moved outward (the handrail side) in order to superimpose the handrail and the handrail in the use posture. ) Is no longer necessary. Thus, since it is not necessary to extend a handrail outward, the protrusion dimension to the outward of a handrail can be restrained small in the retracting attitude
- the handrail has a pair of left and right handrails.
- the width of the pair of left and right handrails is larger than the width of the main frame. This prevents the pair of left and right handrails from interfering with the support member in the retracted posture.
- the handrail is connected to the side portion of the lifting device main body in the use posture, and extends upward from the side portion to the side.
- the width of the pair of left and right handrails can be easily increased.
- the buffer member can be attached at a position facing the connection plate of the lifting device main body in the retracted posture. For this reason, when the lifting / lowering device main body is rotated from the use posture to the retracted posture, the shock caused by the collision between the side plate and the connection plate can be reduced by the buffer member.
- the handrail is superimposed on the handrail when in the use posture in the side view of the lifting device body.
- the operator who raises / lowers the lifting / lowering apparatus main body can grip the handrail and the handrail without breaks.
- the elevating / lowering performance of the operator who raises / lowers the lifting / lowering device main body can be secured, and the operator can be protected.
- the support member includes a connection plate.
- the connection plate is disposed between the handrail and the main frame and has a front end located on the rotating shaft side and a rear end located on the opposite side of the front end.
- the height of the handrail from the rotating shaft is smaller than the distance from the rotating shaft to the rear end of the connecting plate. This suppresses the handrail from interfering with other members when the lifting device body rotates between the use posture and the retracted posture.
- the handrail and the lifting device main body are connected to each other at least at the first connection portion and the second connection portion.
- the first connection portion and the second connection portion are adjacent to each other with the handrail interposed therebetween in the retracted posture.
- the handrail has a protruding region that protrudes from the retracted posture toward the rotation direction side of the lifting device main body than the first connection portion and the second connection portion.
- the protruding region is located in a region larger than the rotation radius of the first connection portion during rotation of the lifting device main body and smaller than the rotation radius of the second connection portion.
- the rotation trajectory of the connection portion between the handrail and the lifting device body within the rotation angle range of the lifting device body from the use posture to the retracted position does not interfere with the protruding region of the handrail.
- the first and second connection portions are disposed in the first and second connection portions. For this reason, the handrail is prevented from interfering with the handrail within the rotation angle range from the use posture to the retracted posture.
- a work vehicle according to the present invention includes a vehicle body including the above access system. According to the work vehicle of the present invention, the interference between the handrail and the obstacle can be suppressed even when the inclination angle of the lifting device main body in the use state with respect to the horizontal plane is reduced as described above.
- the support member can include any part of the work vehicle body.
- the present invention it is possible to suppress interference between the handrail and the obstacle even when the inclination angle of the lifting device main body in use is reduced with respect to the horizontal plane.
- FIG. 1 is a perspective view schematically showing a configuration of a hydraulic excavator in an embodiment of the present invention.
- FIG. 2 is a perspective view schematically showing a configuration of an access system included in the hydraulic excavator shown in FIG. 1.
- the top view (A) which shows the main frame and the raising / lowering apparatus main body in the retracted position of the access system shown in FIG. 2 from the upper part of the raising / lowering apparatus main body (above the work vehicle), and the side view (B) shown from the side of the lifting apparatus main body ).
- It is a figure which shows the state which the raising / lowering device main body in the hydraulic shovel shown in FIG.
- FIG. 1 is in a use attitude
- FIG. 1 It is a figure which shows from the side of a raising / lowering apparatus main body the mechanism which rotates a raising / lowering apparatus main body between a use attitude
- FIG. 1 It is a schematic diagram (A) which shows a state in case the inclination angle with respect to the horizontal surface of the raising / lowering device main body in use state is large, and a schematic diagram (B) which shows a state in case an inclination angle is small.
- a hydraulic excavator will be described below with reference to FIG. 1 as an example of a work vehicle to which the idea of the present invention can be applied.
- the present invention can be applied to a work vehicle having an access system such as a bulldozer and a wheel loader in addition to the hydraulic excavator.
- the front-rear direction refers to the front-rear direction of the operator seated on the driver's seat.
- the left-right direction (width direction) refers to the left-right direction of the operator seated on the driver's seat.
- the vertical direction means the vertical direction of the operator seated on the driver's seat.
- the direction facing the operator seated in the driver's seat is the front direction
- the direction facing the front direction is the rear direction.
- the right side and the left side are the right direction and the left direction, respectively.
- the feet of the operator seated in the driver's seat are the lower side and the upper head is the upper side.
- FIG. 1 is a perspective view schematically showing a configuration of a hydraulic excavator according to an embodiment of the present invention.
- a hydraulic excavator 50 according to the present embodiment is a large hydraulic excavator, and mainly includes a traveling body 20, a revolving body 30, and a work implement 40.
- the traveling body 20 and the turning body 30 constitute a work vehicle main body.
- the traveling body 20 has a pair of left and right crawler belt devices 21.
- Each of the pair of left and right crawler belt devices 21 has a crawler belt.
- the hydraulic excavator 50 self-propels.
- the turning body 30 is installed so as to be turnable with respect to the traveling body 20.
- the swivel body 30 mainly includes a cab 31, an engine room 32, a counterweight 33, and the access system 10.
- the driver's cab 31 is disposed on the front left side (the vehicle front side) of the revolving structure 30.
- Each of the engine room 32 and the counterweight 33 is disposed on the rear side (rear side of the vehicle) of the revolving structure 30.
- the engine room 32 houses engine units (engine, exhaust treatment structure, etc.).
- the upper part of the engine room 32 is covered with an engine hood.
- the counterweight 33 is disposed behind the engine room 32.
- the access system 10 is disposed on the left side of the revolving unit 30, for example, on the left side.
- the access system 10 is provided for an operator to get into the cab 31 from the ground and to get out of the cab 31 to the ground.
- the detailed configuration of the access system 10 will be described later.
- the work machine 40 is pivotally supported on the front side of the revolving unit 30.
- the work machine 40 includes, for example, a boom 41, an arm 42, a bucket 43, a hydraulic cylinder, and the like.
- a base end portion of the boom 41 is rotatably connected to the revolving body 30.
- the base end portion of the arm 42 is rotatably connected to the tip end portion of the boom 41.
- the bucket 43 is rotatably connected to the tip of the arm 42.
- the work machine 40 can be driven by each of the boom 41, the arm 42, and the bucket 43 being driven by a hydraulic cylinder.
- FIG. 2 is a perspective view schematically showing a configuration of an access system included in the excavator shown in FIG.
- FIGS. 4 and 5 show the state of the lifting device body 1 when looking forward from behind the work vehicle 50.
- the access system 10 includes a lifting device body 1, a pair of left and right handrails (handrails) 2, a pair of left and right handrails 3, and a pair of left and right hands.
- Connection plate 4 main frame 5, steps 6 and 8, passage portion 7, and handrail 9.
- the lifting device body 1 mainly has two side plates 11, a plurality of steps 12, and a buffer member (stopper) 13.
- the two side plates 11 are arranged with a space therebetween.
- the plurality of steps 12 are arranged between the two side plates 11 and connected to each of the two side plates 11.
- a ladder is configured by the two side plates 11 and the plurality of steps 12.
- Each of the plurality of steps 12 is a portion that serves as a scaffold when the operator raises and lowers the lifting device body 1.
- the buffer member 13 is attached to each of the two side plates 11.
- the buffer member 13 is a stopper, and is a portion that abuts the connection plate 4 when the lifting device body 1 is shifted from the use posture to the retracted posture.
- the buffer member 13 is disposed on the surface of the side plate 11 facing the front end 4 a of the connection plate 4 in the retracted posture of the lifting device body 1.
- the buffer member 13 is made of a material such as rubber, for example.
- the buffer member 13 may be provided on the connection plate 4 side.
- Each of the pair of left and right handrail portions 2 is connected to a side portion of the lifting device body 1.
- the handrail portion 2 is connected to a side portion of the lifting / lowering device body 1 in the use posture of the lifting / lowering device body 1 and extends in the height direction after extending from the side portion in a direction (side) away from the lifting / lowering device body 1. ing.
- each of the pair of left and right handrail portions 2 includes a support portion 2a, a grip portion 2b, and a protruding portion 2c.
- the support portion 2a has a horizontal portion 2aa and a vertical portion 2ab.
- the lateral part 2aa is attached to each of the side plates 11.
- the lateral portion 2aa extends from the connecting portion with the side plate 11 to the side opposite to the step 12.
- the vertical portion 2ab is connected to the end of the horizontal portion 2aa opposite to the step 12 side.
- the vertical portion 2ab extends upward from the connecting portion with the horizontal portion 2aa in the use posture of the lifting device main body 1.
- the grip portion 2b is connected to the upper end of the vertical portion 2ab.
- the grip portion 2b is a part of the handrail portion 2 that is gripped when the operator lifts and lowers the lifting device body 1.
- the grip portion 2b extends in a direction from the other end (second end, tip) 1b of the lifting device body 1 toward one end (first end, base end) 1a.
- the grip portion 2b extends, for example, in parallel with the side plate 11.
- the protruding portion 2c protrudes from the end of the grip portion 2b toward the handrail 3 in the use posture of the lifting device main body 1.
- the upper part of the protrusion 2c is linearly continuous with the grip 2b.
- the upper part of the protrusion part 2c and the holding part 2b are set so that the height from the side plate 11 may become the same.
- the elevating device body 1 has one end 1a and the other end 1b.
- the lifting device main body 1 is supported by the main frame 5 so as to be rotatable about the rotation shaft 1c at one end 1a. Thereby, the raising / lowering apparatus main body 1 can move between a use attitude
- the use posture of the lifting device body 1 is a posture in which the lifting device body 1 is tilted so that the other end 1b of the lifting device body 1 is positioned below the one end 1a as shown in FIGS. .
- the retracted posture is a posture in which the lifting device main body 1 is erected (upright) so that the other end 1b faces upward as shown in FIG.
- Each of the pair of left and right connection plates 4 is connected to the main frame 5.
- Each of the pair of left and right connection plates 4 is connected to the main frame 5 by a fastening member such as a bolt, for example. Thereby, each of the pair of left and right connection plates 4 is fixed in a standing state with respect to the main frame 5.
- the connection plate 4 and the main frame 5 are included in the support member.
- Each of the pair of left and right connection plates 4 has a front end 4a located on the rotating shaft 1c side and a rear end 4b located on the opposite side of the front end 4a.
- Each of the pair of left and right hand rails 3 is attached to a connection plate 4. Thereby, the handrail 3 is supported by the main frame 5 with the connection plate 4 interposed therebetween.
- Each of the pair of left and right hand rails 3 protrudes from the front end 4 a of the connection plate 4 to the lifting device main body 1 side.
- Each of the pair of left and right hand rails 3 protrudes upward from the upper end of the connection plate 4.
- Each of the pair of left and right hand rails 3 has an inclined portion. The inclined portion is inclined so that the height increases from the front end 4 a side to the rear end 4 b side of the connection plate 4.
- the width W1 of the pair of left and right handrails 2 is larger than the width W2 of the pair of left and right handrails 3.
- the width W2 of the pair of left and right handrails 3 is larger than the width W3 of the main frame 5.
- the staircase portion 6 is disposed between the pair of left and right connection plates 4.
- the staircase portion 6 is configured to climb upward from the lifting device main body 1 side toward the passage portion 7.
- the passage portion 7 is disposed adjacent to the pair of left and right connection plates 4.
- the passage portion 7 is configured by a flat surface on which unevenness for preventing slip is formed.
- the passage portion 7 is disposed on the side opposite to the lifting device body 1 with respect to the pair of left and right connection plates 4.
- the passage portion 7 is attached to the main frame 5.
- the upper surface of the battery case may be used as the passage portion 7.
- the staircase portion 8 is configured to climb further upward from the passage portion 7 toward the cab.
- Handrails 9 are arranged on the left and right sides of the staircase 8.
- FIG. 3A is a plan view showing the main frame and the lifting device main body in the retracted posture of the access system shown in FIG. 2 from above the lifting device main body
- FIG. 3B is a side view of the lifting device main body.
- a protruding piece 1d is fixed to the lifting device body 1 by welding. Specifically, one end of the protruding piece 1d is fixed to the fixed shaft 1da fixed to the two side plates 11 of the lifting device body 1 by welding. The other end portion of the protruding piece 1d is connected to one end portion of the hydraulic cylinder 1e with a rotation shaft 1db interposed therebetween. The other end of the hydraulic cylinder 1e is supported by the main frame 5 with a rotating shaft 1ea interposed therebetween.
- the protruding piece 1d is rotatable relative to the hydraulic cylinder 1e around the rotation shaft 1db.
- the hydraulic cylinder 1e is rotatable with respect to the main frame 5 around the rotation shaft 1ea.
- the lifting device body 1 By operating the hydraulic cylinder 1e as an actuator, the lifting device body 1 can be rotated about the rotation shaft 1c with the protruding piece 1d interposed. As a result, the lifting device body 1 can rotate between the use posture and the retracted posture.
- FIG. 4 and FIG. 5 are views showing a state in which the lifting device body in the hydraulic excavator shown in FIG. 1 is in the use posture and the retracted posture from the side of the lifting device body.
- the lifting device body 1 in the usage posture of the lifting device body 1, the lifting device body 1 is inclined so that the other end 1b is positioned below the one end 1a.
- Each of the pair of left and right handrail portions 2 has a rotating shaft 1c with respect to a direction from the other end 1b toward the one end 1a (in the direction of arrow A in the figure) in this use posture in a side view of the lifting device body 1. It has the protrusion part 2c extended on the handrail 3 side rather than the position.
- each protruding portion 2 c of the pair of left and right handrail portions 2 is an imaginary straight line SL that connects one end 1 a and the other end 1 b of the lifting device body 1. It protrudes to the handrail 3 side from a virtual straight line NL that is a perpendicular and passes through the rotation axis 1c.
- the virtual straight line SL is a straight line that passes through the center of the rotation shaft 1 c in the side view of the lifting device body 1.
- the handrail portion 2 is superimposed on the handrail 3 when in the use posture.
- the height LA from the virtual straight line SL passing through the center of the rotating shaft 1c is set to be the same between the upper portion of the protruding portion 2c and the grip portion 2b.
- the height LA of the handrail portion 2 from the center of the rotating shaft 1c is smaller than the distance LB in the vehicle body width direction from the center of the rotating shaft 1c to the rear end 4b of the connecting plate 4. Is set.
- the distance LC from the center of the rotating shaft 1 c to the upper end 2 EP on the handrail 3 side of the protruding portion 2 c is the vehicle body from the center of the rotating shaft 1 c to the rear end 4 b of the connecting plate 4. It is set smaller than the distance LB in the width direction.
- the lifting device body 1 stands so that the other end 1b faces upward.
- the two side plates 11 stand upright in the vertical direction.
- the buffer member 13 of the lifting device main body 1 faces the front end 4a of the connection plate 4 and is in contact with the front end 4a of the connection plate 4.
- the outer end 3EP of the handrail 3 protrudes outward in the width direction of the work vehicle from the side plate 11. Further, a part of the inclined portion of the handrail 3 is located in a region sandwiched between the side plate 11 and the vertical portion 2ab of the handrail portion 2.
- FIG. 6 is a view showing a state in which the lifting device body rotates between the use posture and the retracted posture from the side of the lifting device body.
- FIG. 7 is a view showing a mechanism for rotating the lifting / lowering device main body between the use posture and the retracted posture with respect to the main frame from the side of the lifting / lowering device main body.
- the lifting device body 1 when the lifting device body 1 rotates around the rotation shaft 1 c, the lifting device body 1 can rotate between the use posture and the storage posture.
- the rotation trajectory of the connection portion between the handrail portion 2 and the lifting device body 1 within the rotation angle range of the lifting device body 1 from the use posture to the storage posture (two-dot chain line in FIG. 6). ) Does not interfere with the handrail 3. This configuration will be specifically described below.
- the handrail portion 2 and the lifting device main body 1 are connected to each other through a plurality of connecting portions.
- the plurality of connection portions include a first connection portion 2aa1 and a second connection portion 2aa2.
- the first connection portion 2 aa 1 and the second connection portion 2 aa 2 are adjacent to each other with the handrail 3 in between in the retracted posture.
- the handrail 3 has a protruding region 3ER (hatching region in the drawing) that protrudes from the first connection portion 2aa1 and the second connection portion 2aa2 to the rotation direction (arrow RD direction in the drawing) side of the lifting device body from the retracted posture. ing.
- This protruding area 3ER is an area protruding toward the rotation direction (arrow RD direction in the figure) from the virtual straight line IL connecting the first connection portion 2aa1 and the second connection portion 2aa2 in a side view of the lifting device body 1. . As shown in FIG. 6, the protruding region 3ER is in a region larger than the rotation radius R1 of the first connection portion 2aa1 when the lifting device body 1 is rotated, and is larger than the rotation radius R2 of the second connection portion 2aa2. Located in a small area.
- the rotation trajectory of the plurality of connecting portions between the handrail portion 2 and the lifting device body 1 within the rotation angle range of the lifting device body 1 from the use posture to the retracted posture is the hand It does not interfere with the protruding region 3ER of the rail 3.
- the hydraulic cylinder 1e as an actuator expands and contracts during the above rotation operation in the lifting device body 1. Due to the expansion and contraction of the hydraulic cylinder 1e, the protruding piece 1d rotates relative to the hydraulic cylinder 1e about the rotation shaft 1db. By the rotation of the protruding piece 1d, the driving force of the hydraulic cylinder 1e is transmitted to the lifting device body 1 through the protruding piece 1d.
- the lifting device main body 1 receives the driving force of the hydraulic cylinder 1e and rotates around the rotation shaft 1c. As a result, the lifting device body 1 rotates between the use posture and the retracted posture.
- the hydraulic cylinder 1e is set so that the piston rod reaches the backward stroke end in the use posture. Thereby, it is prevented that the raising / lowering apparatus main body 1 inclines more than the inclination angle set in the use attitude
- FIG. 8A is a schematic diagram illustrating a state where the tilt angle of the lifting device main body in a use state is large with respect to the horizontal plane
- FIG. 8B is a schematic diagram illustrating a state where the tilt angle is small. .
- the height H2b of the handrail portion 2 in the vertical direction becomes lower than the height H2a in FIG. 8A.
- the operator since the height H2b of the handrail portion 2 is reduced when viewed from the operator who raises and lowers the lifting device body 1, the operator becomes difficult to grip the handrail portion 2.
- the height H2b in the vertical direction of the handrail portion 2 is increased in the state of the inclination angle ⁇ 2 in FIG.
- the height of the handrail portion 2 in the vertical direction is the same as the height H2a shown in FIG.
- the distance Db in the width direction of the work vehicle between the upper end portion 2EP of the handrail portion 2h and the rotating shaft 1c is larger than the distance Da shown in FIG. Become.
- the handrail portion 2 is a portion (protruding portion 2 c) that extends to the handrail 3 side from the position of the rotation shaft 1 c (perpendicular line NL in the figure). )have.
- the handrail portion 2 and the handrail 3 are moved in the use posture.
- the outward projecting dimension of the handrail 3 can be suppressed small, and interference between the handrail 3 and the obstacle can be avoided.
- the width W1 of the pair of left and right handrail portions 2 is set to be larger than the width W3 of the main frame 5.
- the pair of left and right handrail portions 2 is prevented from interfering with the main frame 5. .
- the handrail part 2 is connected to the side plate 11 of the raising / lowering device main body 1, and extends upwards after extending from the connection part with the side plate 11 to the side. Yes.
- FIG. 3A it becomes easy to make the width W1 of the pair of left and right handrail portions 2 wider than the width W3 of the main frame 5.
- the handrail portion 2 is connected to the side plate 11 of the lifting device main body 1 and extends upward after extending sideways from the connection portion with the side plate 11.
- the width W1 of the handrail portion 2 can be made wider than the width W2 of the pair of left and right handrails 3.
- the buffer member 13 as a stopper to the surface where the side plate 11 faces the front end 4 a of the connection plate 4 in the retracted posture of the lifting device body 1. Therefore, as shown in FIG. 6, when the lifting device body 1 is rotated from the use posture to the retracted posture, the shock caused by the collision between the side plate 11 and the connection plate 4 can be reduced by the buffer member 13.
- the protruding portion 2 c of the handrail portion 2 is superimposed on the handrail 3 in the use posture in a side view of the lifting device body 1.
- the operator who raises / lowers the lifting / lowering device main body 1 can grip the handrail portion 2 and the handrail 3 without breaks.
- the raising / lowering property of the operator who raises / lowers the raising / lowering apparatus main body 1 can be ensured, and an operator can be protected.
- the height LA of the handrail portion 2 from the rotating shaft 1c is smaller than the distance LB from the rotating shaft 1c to the rear end 4b of the connecting plate 4.
- the handrail portion 2 is prevented from interfering with the vehicle body of the work vehicle 50 when the lifting device body 1 rotates between the use posture and the retracted posture.
- the distance LC from the rotating shaft 1c to the upper end 2EP of the handrail portion 2 is set smaller than the distance LB from the rotating shaft 1c to the rear end 4b of the connecting plate 4.
- the handrail portion 2 is further suppressed from interfering with the vehicle body of the work vehicle 50 when the lifting device body 1 rotates between the use posture and the retracted posture.
- the handrail portion 2 and the lifting device body within the rotation angle range of the lifting device body 1 from the use posture to the retracted posture. 1 does not interfere with the handrail 3. This prevents the handrail portion 2 from interfering with the handrail 3 within the rotation angle range from the use posture to the retracted posture.
- the lifting device main body 1 only needs to be rotatably supported by a support member including the main frame 5 and the connection plate 4.
- the support member may also include other components other than the main frame 5 and the connection plate 4, and the handrail 3 may be supported by other components other than the main frame 5 and the connection plate 4.
- the support member may be any part of the work vehicle main body, and in this case, the handrail 3 may be supported by any part of the work vehicle main body.
- 1 Lifting device body 1a one end, 1b other end, 1c, 1db, 1ea rotating shaft, 1d protruding piece, 1da fixed shaft, 1e hydraulic cylinder, 2, 2h, 9 handrail portion, 2EP upper end portion, 2a supporting portion, 2aa horizontal part, 2aa1, 2aa2 connecting part, 2ab vertical part, 2b gripping part, 2c projecting part, 3 hand rail, 3EP outer end part, 3ER projecting area, 4 connecting plate, 4a front end, 4b rear end, 5 main frame 6, 8 Stairs, 7 Passages, 9 Handrails, 10 Access systems, 11 Side plates, 12 Steps, 13 Buffer members, 20 Running bodies, 21 Tracks, 30 Swirling bodies, 31 Driver's cab, 32 Engine rooms, 33 Counterweight, 40 working machines, 41 boom, 42 arms, 43 buckets, 50 working vehicles
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- Component Parts Of Construction Machinery (AREA)
Abstract
Description
本発明の作業車両によれば、上記のとおり使用状態における昇降装置本体の水平面に対する傾斜角度が小さくなった場合でも、ハンドレールと障害物との干渉を抑制することができる。
まず、本発明の一実施の形態における作業車両の構成について説明する。以下、本発明の思想を適用可能な作業車両の一例として油圧ショベルについて図1を用いて説明する。なお本発明は油圧ショベル以外にブルドーザ、ホイールローダなどのアクセスシステムを有する作業車両にも適用可能である。
図2は、図1に示す油圧ショベルに含まれるアクセスシステムの構成を概略的に示す斜視図である。
Claims (7)
- メインフレームを含む支持部材と、
第1端部および第2端部を有し、前記第1端部において回転軸を中心に回転可能に前記支持部材に支持され、かつ前記第2端部が前記第1端部よりも下方に位置するように傾斜した使用姿勢と前記第2端部が上方を向くように起立した格納姿勢とを取り得る昇降装置本体と、
前記支持部材に支持されたハンドレールと、
前記昇降装置本体に取り付けられ、かつ前記昇降装置本体の側面視において前記使用姿勢のときに前記第2端部から前記第1端部へ向かう方向に、前記回転軸の位置よりも前記ハンドレール側に延びた部分を有する手摺りと
を備えた、アクセスシステム。 - 前記手摺りは、左右1対の手摺り部を有し、
前記左右1対の手摺り部の幅は、前記メインフレームの幅よりも大きい、請求項1に記載のアクセスシステム。 - 前記手摺りは、前記使用姿勢において、前記昇降装置本体の側部に接続され、前記側部から側方へ延びた後に上方に延びている、請求項1または請求項2に記載のアクセスシステム。
- 前記昇降装置本体の側面視において、前記使用姿勢のときに前記手摺りは前記ハンドレールに重畳している、請求項1から請求項3のいずれか1項に記載のアクセスシステム。
- 前記支持部材は接続板を含み、
前記接続板は、前記ハンドレールと前記メインフレームとの間に配置され、かつ前記回転軸側に位置する前端と、前記前端の反対側に位置する後端とを有し、
前記回転軸からの前記手摺りの高さが前記回転軸から前記接続板の前記後端までの距離よりも小さい、請求項1から請求項4のいずれか1項に記載のアクセスシステム。 - 前記手摺りと前記昇降装置本体とは少なくとも第1接続部と第2接続部とにおいて互いに接続されており、
前記昇降装置本体の側面視において、前記格納姿勢のときに前記第1接続部と前記第2接続部とは前記ハンドレールを挟んで互いに隣り合い、かつ前記ハンドレールは前記第1接続部および前記第2接続部よりも前記格納姿勢からの前記昇降装置本体の回転方向側へ突き出す突出し領域を有し、前記突出し領域は前記昇降装置本体の回転時における前記第1接続部の回転半径よりも大きい領域内であって前記第2接続部の回転半径よりも小さい領域内に位置している、請求項1から請求項5のいずれか1項に記載のアクセスシステム。 - 請求項1から請求項6のいずれか1項に記載のアクセスシステムを含む車体を備えた、作業車両。
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JP2016554510A JP6437565B2 (ja) | 2015-06-29 | 2015-06-29 | アクセスシステムおよび作業車両 |
DE112015002201.5T DE112015002201T8 (de) | 2015-06-29 | 2015-06-29 | Zugangssystem und Arbeitsfahrzeug |
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