JP2017109605A - Transportation vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress a shift lever from being misoperated against operator's will.SOLUTION: A shift lever device 21 provided to a console box is constituted including: a shift lever 22; a lever forward/backward moving mechanism supporting the shift lever 22 movably in forward/backward directions; a lever right/left moving mechanism supporting the lever forward/backward moving mechanism movably in right/left directions to and away from the console box; and a guide member 33 guiding the shift lever 22 in moving in the forward/backward directions and right/left directions. The guide member 33 is provided with a longitudinal guide groove 33B that the shift lever 22 engages when moving from a neutral position to a forward movement position or backward movement position; and a lateral guide groove 33C that the shift lever 22 engages in staying at the neutral position so as to restrict the shift lever 22 from moving to the forward movement position or backward movement position.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a transport vehicle having traveling wheels such as a dump truck.

  A dump truck as a representative example of a large transport vehicle is a self-propelled vehicle body having front and rear wheels, a loading platform (vessel) that can be tilted on the vehicle body and is loaded with a load, and a front side of the loading platform. And a cab that is located on the vehicle body and that defines a cab.

  The cab is provided with a driver's seat where the operator is seated, a steering device (steering device) that is disposed in front of the driver's seat and controls the traveling direction of the vehicle body, and a console box that is disposed on the side of the driver's seat. It has been.

  The console box is provided with a shift lever device that switches forward and backward of the vehicle body by operation of the shift lever, and a hoist lever device that raises and lowers the cargo bed. In this case, the shift lever of the shift lever device is tilted forward and backward by the operator seated in the driver's seat, and moved (tilted) from the neutral position to the front side and the neutral position located in the middle of the front and rear directions. The position is switched between three positions: a forward position and a backward position moved (tilted) from the neutral position to the rear side.

  When the shift lever is held at the neutral position, the vehicle body stops traveling. When the shift lever is switched to the forward position, the vehicle body travels forward. When the shift lever is switched to the reverse position, the vehicle body travels backward. It has a configuration.

  By the way, as a shift lever device for a transport vehicle according to the prior art, a device having a vertical shift path extending in the front and rear directions and moving the shift lever in the front and rear directions along the vertical shift path is known. Yes. In this shift lever device, five positions of a P (parking) position, an N (neutral) position, a D (automatic shift) position, an L2 (low speed operation) position, and an L1 (high speed operation) position are set in the vertical shift path. By moving the shift lever to any one of these five positions, the traveling operation of the transport vehicle is controlled (see Reference 1).

  However, in the shift lever device of Reference 1, for example, when a part of the operator's body touches the shift lever, the shift lever is in the P position, N position, D position, and L2 position against the operator's will. , There is a problem that the shift lever is erroneously operated due to the movement to one of the L1 positions.

  On the other hand, a shift lever device mounted on a passenger car has a guide member for positioning the shift lever at a parking position, a reverse position, a neutral position, and a drive position. The guide member of this shift lever device is provided with a bent portion between the neutral position and the reverse position, and the shift lever engages with the bent portion when moving from the neutral position to the reverse position. This prevents the shift lever from moving forward from the neutral position to the reverse position even if a forward force acts on the shift lever by unintentionally touching the shift lever. (See Patent Document 2).

JP-A-5-172221 JP-A-8-318751

  However, in the shift lever device of Patent Document 2, the neutral position and the drive position of the guide member are linearly continuous in the front and rear directions. For this reason, if the driver's body touches the shift lever and a backward force acts on the shift lever, the shift lever may be switched from the neutral position to the drive position against the driver's will. There is.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a transport vehicle that can suppress a shift lever from being erroneously operated against the intention of an operator.

  In order to solve the above-described problems, the present invention provides a self-propelled vehicle body, a cargo bed that is tiltably provided on the vehicle body, and that carries a transported object, and a driver's cab that is provided on the vehicle body and is located in front of the cargo bed. A cab that defines a driving seat, a steering device that is disposed on a front side of the driver seat and controls a traveling direction of the vehicle body, and is disposed on a side of the driver seat. The present invention is applied to a transport vehicle that includes a console box and a shift lever device that is provided in the console box and switches forward and backward of the vehicle body by operating a shift lever.

  A feature of the configuration adopted by the present invention is that the shift lever device includes the shift lever protruding upward from the console box and the vehicle body based on a neutral position where the shift lever stops traveling of the vehicle body. A lever back-and-forth movement mechanism that supports forward and backward movement to a forward position for moving forward or a reverse position for moving the vehicle body backward, and the lever front-and-rear movement mechanism provided in the console box together with the shift lever. A lever left / right moving mechanism that is supported so as to be movable in the left and right directions, and a guide member that is provided on the upper surface of the console box and guides the movement when the shift lever moves in the front, rear, left, and right directions. The shift lever is located on the guide member from the neutral position to the forward position. Is a forward / backward movement guide that is engaged when moving to the reverse position, and the shift lever is moved to the forward position or the reverse position by engaging when the shift lever is holding the neutral position. And a neutral holding guide that regulates the above.

  According to the present invention, when the vehicle body is stopped and the shift lever is holding the neutral position, the shift lever is engaged with the neutral holding guide of the guide member, so that the shift lever is moved forward or backward from the neutral position. The movement to the position can be restricted. As a result, even if a part of the operator's body touches the shift lever held in the neutral position, the shift lever can be prevented from being switched to the forward position or the reverse position, and erroneous operation on the shift lever can be suppressed. Can do.

It is a front view which shows the dump truck to which the 1st Embodiment of this invention was applied. It is the top view of the partial fracture | rupture which looked at the inside of the cab in FIG. 1 from upper direction. It is a top view which expands and shows the console box, shift lever apparatus, etc. in FIG. It is sectional drawing seen from the arrow IV-IV direction in FIG. 3 which shows the shift lever apparatus by 1st Embodiment provided in the console box. It is a partially broken exploded view showing the shift lever device in FIG. It is sectional drawing which looked at the shift lever apparatus from the arrow VI-VI direction in FIG. 3 in the state which has a shift lever in a neutral position. It is a partially broken exploded view showing the shift lever device in FIG. It is a perspective view which shows a console box, a shift lever apparatus, etc. It is a disassembled perspective view which shows the console box, shift lever, guide member, etc. in FIG. It is a perspective view which shows the state which assembled the shift lever, the lever back-and-forth movement mechanism, and the slide cover. It is a disassembled perspective view which shows a shift lever, a lever back-and-forth movement mechanism, and a slide cover. It is the side view which looked at the shift lever in a neutral position, a lever back-and-forth movement mechanism, and a slide cover from the arrow XII-XII direction in FIG. It is sectional drawing which looked at the shift lever in a neutral position, a lever back-and-forth movement mechanism, and a slide cover from the arrow XIII-XIII direction in FIG. FIG. 13 is a side view similar to FIG. 12 showing a shift lever, a lever back-and-forth movement mechanism, and a slide cover in an advanced position. It is a side view similar to FIG. 12 which shows the shift lever, lever back-and-forth movement mechanism, and slide cover in a reverse drive position. It is a top view similar to FIG. 3 which shows the state which switched the shift lever to the advance position. FIG. 4 is a plan view similar to FIG. 3 showing a state in which the shift lever is switched to the reverse position. It is sectional drawing similar to FIG. 6 which shows the state which switched the shift lever to the forward drive position or the reverse drive position. It is a top view similar to FIG. 3 which shows the shift lever apparatus etc. by 2nd Embodiment. It is sectional drawing which looked at the shift lever apparatus from the arrow XX-XX direction in FIG. 19 in the state which has a shift lever in a neutral position. It is a disassembled perspective view which shows a console box, a shift lever, a guide member, etc. It is a top view similar to FIG. 19 which shows the state which switched the shift lever to the advance position. It is sectional drawing similar to FIG. 20 which shows the state which switched the shift lever to the advance position. FIG. 20 is a plan view similar to FIG. 19 showing a state in which the shift lever is switched to the reverse position. It is sectional drawing similar to FIG. 20 which shows the state which switched the shift lever to the reverse drive position. It is the same top view as FIG. 3 which shows the modification of the shift lever apparatus by 1st Embodiment.

  Hereinafter, embodiments of a transport vehicle according to the present invention will be described in detail with reference to the accompanying drawings, taking a dump truck as an example.

  1 to 18 show a first embodiment of the present invention. In the figure, a dump truck 1 which is a large transport vehicle transports transported materials such as crushed stones mined in a mine. The dump truck 1 includes a self-propelled vehicle body 2 and a cargo bed (vessel) 3 that is mounted on the vehicle body 2 so as to be able to tilt (raise and lower) in order to load a load. Left and right front wheels 4 are provided on the front side of the vehicle body 2, and the left and right front wheels 4 constitute steering wheels that are steered (steered) by an operator. Left and right rear wheels 5 are provided on the rear side of the vehicle body 2, and the left and right rear wheels 5 constitute drive wheels.

  The vehicle body 2 of the dump truck 1 has a vehicle body frame 6 that serves as a base, and a pair of left and right cargo bed support brackets 6A (only the left side is shown) are provided on the rear end side of the vehicle body frame 6. A bracket 3A provided on the lower surface side of the loading platform 3 is connected to each loading platform support bracket 6A via a hinge pin 7 so as to be tiltable. Further, the body frame 6 is provided with a pair of left and right cylinder mounting brackets 6B (only the left side is shown) positioned between the front wheels 4 and the rear wheels 5. Between the cylinder mounting bracket 6B of the body frame 6 and the loading platform 3, left and right hoist cylinders 8 (only the left side is shown) are provided. By expanding and contracting each hoist cylinder 8, the loading platform 3 tilts (raises and lowers) with respect to the vehicle body frame 6 with the hinge pin 7 as a fulcrum.

  A building 9 is provided on the front end side of the body frame 6. The building 9 defines a machine room on the front side of the vehicle body 2, and houses an engine, a radiator, and the like (none of which are shown). A floor 10 is provided on the upper side of the building 9. The floor 10 has a flat plate shape extending in the horizontal direction, and is supported by an upper cross beam (not shown) attached to the vehicle body frame 6 and the building 9 in a state extending in the horizontal direction.

  The cab 11 is mounted on the floor 10 and defines a cab. As shown in FIG. 2, the cab 11 is formed in a box shape surrounded by a front surface 11A, a rear surface 11B, a left side surface 11C, a right side surface 11D, and an upper surface 11E, and the left and right side surfaces 11C and 11D are respectively loaded and unloaded. Doors 11F and 11G are provided to be openable and closable. A floor plate 12 serving as a floor surface is provided in the cab 11, and a driver seat 13, a console box 16, and the like, which will be described later, are provided on the floor plate 12.

  The driver's seat 13 is located on the left side surface 11 </ b> C side of the cab 11 and is disposed on the floor plate 12, and is seated by an operator who operates the dump truck 1. A dashboard 14 extends leftward and rightward on the front side of the driver's seat 13, and various instruments and operation devices are arranged on the dashboard 14.

  The steering device 15 is located between the driver's seat 13 and the dashboard 14 and is provided on the front side of the driver's seat 13. The steering device 15 is steered by an operator seated in the driver's seat 13. The left and right front wheels 4 are steered according to a steering operation with respect to the steering device 15 to control the traveling direction of the vehicle body 2.

  The console box 16 is provided on the floor plate 12 adjacent to the right side of the driver's seat 13. The console box 16 is formed in a box shape extending in the front and rear directions as a whole, and the front side of the console box 16 is an operation equipment mounting box 17 to which a hoist lever 20, a shift lever device 21 and the like which will be described later are mounted. Yes.

  As shown in FIGS. 3 and 9, etc., the operating device mounting box 17 is formed in a rectangular parallelepiped box shape surrounded by an upper surface plate 17A, a front surface plate 17B, a rear surface plate 17C, a left side surface plate 17D, and a right side surface plate 17E. . The upper surface plate 17A of the operating device mounting box 17 is an inclined surface that gently inclines downward from the front plate 17B toward the rear plate 17C. As shown in FIGS. 6 and 7, two mounting bases 17F and 17G having a block shape are fixed to the inner side surface of the left side plate 17D of the operating device mounting box 17 by means of welding or the like. Yes. A base member 26 to be described later is attached to the rear mounting base 17F, and a reaction force receiving bracket 36 to be described later is attached to the front mounting base 17G.

  Here, as shown in FIG. 9, a hoist lever mounting hole 18 for mounting a hoist lever 20 described later is provided on the rear side of the upper surface plate 17 </ b> A constituting the operating device mounting box 17. On the other hand, a shift lever insertion hole 19 for inserting a shift lever 22 described later is provided on the front side of the upper surface plate 17A. The shift lever insertion hole 19 includes a circular intermediate hole 19A positioned at the intermediate portion in the left and right directions, a straight left groove hole 19B that communicates with the left side of the intermediate hole 19A and extends rearward from the intermediate hole 19A, It is constituted by a straight right groove hole 19C that communicates with the right side of the hole 19A and extends forward and rearward from the intermediate hole 19A. The shift lever 22 is configured to be able to move in the intermediate hole 19A, the left groove hole 19B, and the right groove hole 19C of the shift lever insertion hole 19.

  The hoist lever 20 is provided on the rear side of the operating device mounting box 17. The hoist lever 20 is attached to the hoist lever attachment hole 18 of the upper surface plate 17A constituting the operating device attachment box 17, and protrudes upward from the upper surface plate 17A. The hoist lever 20 is operated forward and backward by an operator seated in the driver's seat 13 to expand and contract the hoist cylinder 8 and tilt the loading platform 3 with respect to the vehicle body 2.

  Next, the shift lever device 21 used in the first embodiment will be described.

  The shift lever device 21 is provided on the front side of the operating device mounting box 17 constituting the console box 16. The shift lever device 21 switches between forward travel and reverse travel of the vehicle body 2 when an operator seated in the driver's seat 13 operates the shift lever 22. Here, as shown in FIGS. 4 to 7, the shift lever device 21 includes a shift lever 22, a lever back-and-forth movement mechanism 23, a lever left-right movement mechanism 25, a guide member 33, and a lever urging mechanism 35. It is comprised including.

  The shift lever 22 is provided through a shift lever insertion hole 19 provided in the upper surface plate 17 </ b> A of the operating device mounting box 17, and protrudes upward from the operating device mounting box 17. As shown in FIGS. 10 to 15, the shift lever 22 is formed of a rod-like body extending linearly, and the base end side (lower end side) 22 </ b> A of the shift lever 22 is supported by the lever back-and-forth movement mechanism 23. The front end side (upper end side) 22 </ b> B of the shift lever 22 is a large-diameter gripping part and protrudes upward from the operating device mounting box 17. An operator seated in the driver's seat 13 moves the shift lever 22 forward, rearward, leftward or rightward while holding the front end side 22B of the shift lever 22.

  The lever back-and-forth moving mechanism 23 is provided in the operating device mounting box 17 of the console box 16 and is mounted to the left side plate 17D of the operating device mounting box 17 via the lever left-right moving mechanism 25. As shown in FIGS. 10 to 13, the lever back-and-forth moving mechanism 23 includes a mounting base 23A attached to a support bracket 28 of a lever left-right moving mechanism 25, which will be described later, and a substantially cubic box body 23B attached to the mounting base 23A. And a lever support 23C that protrudes outward from the box 23B and supports the base end side 22A of the shift lever 22 so as to be pivotable forward and backward. Housed in box 23B are electrical components such as sensors (not shown) that output an electrical signal corresponding to the operating position of shift lever 22 to the controller.

  On the other hand, as shown in FIG. 11, on the upper end side of the mounting base 23A, there is provided a rectangular tube portion 23D that accommodates an intermediate portion of the shift lever 22 supported by the lever support 23C. Both ends in the downward direction are long grooves 23E extending in the front and rear directions. Therefore, the shift lever 22 supported by the lever support 23C can move (tilt) forward and backward within the range of the long groove 23E by accommodating the intermediate portion thereof in the rectangular tube portion 23D. . Furthermore, a substantially Z-shaped guide protrusion 23F is provided at the upper end of the rectangular tube portion 23D so as to protrude upward from an intermediate portion in the length direction of the long groove 23E. The guide protrusion 23F guides the slide cover 24 forward and backward by engaging a notch 24D of the slide cover 24 described later.

  Here, the lever back-and-forth movement mechanism 23 tilts the shift lever 22 supported by the lever support 23C forward with respect to the neutral position (the position in FIG. 12) which is an intermediate portion in the front and rear directions and the neutral position as a reference. The forward position (position in FIG. 14) and the backward position (position in FIG. 15) inclined rearward with respect to the neutral position are held at three positions. The electrical component housed in the box body 23B detects which position the shift lever 22 holds between the neutral position, the forward position, and the reverse position, and outputs an electrical signal corresponding to the position held by the shift lever 22. Output to a controller (not shown). As a result, when the shift lever 22 holds the neutral position, the vehicle body 2 stops traveling. When the shift lever 22 holds the forward movement position, the vehicle body 2 travels forward and the shift lever 22 moves backward. When the vehicle is held, the vehicle body 2 is configured to travel backward.

  The slide cover 24 is detachably provided at an intermediate position of the shift lever 22 and closes the long groove 23E of the rectangular tube portion 23D provided on the mounting base 23A from above. Here, the slide cover 24 has a rectangular left dividing plate 24 </ b> A extending in the front and rear directions disposed on the left side with the shift lever 22 interposed therebetween, and a substantially U-shape disposed on the right side with the shift lever 22 interposed therebetween. It is comprised by the right division board 24B. Engagement recesses 24 </ b> C that engage midway portions of the shift lever 22 are formed in the front and rear center portions of the left divided plate 24 </ b> A. On the other hand, a notch 24D that slidably engages with a guide projection 23F provided on the mounting base 23A is formed at the center in the front and rear directions of the right dividing plate 24B.

  The left divided plate 24A and the right divided plate 24B of the slide cover 24 are integrally assembled using two bolts / nuts 24E with the shift lever 22 sandwiched from the radial direction. At this time, as shown in FIG. 10, the engaging recess 24C of the left dividing plate 24A is engaged with the middle portion of the shift lever 22, and the notch 24D of the right dividing plate 24B is a guide provided on the mounting base 23A. The protrusion 23F is slidably engaged. Accordingly, as shown in FIGS. 12 to 15, when the shift lever 22 is moved forward and backward, the slide cover 24 follows the operation of the shift lever 22 while being guided by the guide protrusion 23F. Move later. Thereby, the long groove 23E of the rectangular tube portion 23D provided on the mounting base 23A can always be covered (closed) from the upper side by the slide cover 24, and dust and the like enter the rectangular tube portion 23D through the long groove 23E. Can be suppressed.

  The lever left / right moving mechanism 25 is provided in the operating device mounting box 17 of the console box 16 and supports the lever front / rear moving mechanism 23 together with the shift lever 22 so as to be movable left and right with respect to the operating device mounting box 17. Is. As shown in FIGS. 4 to 7, the lever left-right movement mechanism 25 includes a base member 26, a support shaft 27, and a support bracket 28 which will be described later.

  The base member 26 is attached to the mounting base 17 </ b> F of the operating device mounting box 17. The base member 26 includes a rectangular flat plate-like mounting plate 26A, and a rectangular flat plate-like laterally extending plate 26B that projects rightward from the front end of the mounting plate 26A toward the right side plate 17E of the operating device mounting box 17. It is configured to include. Two bolt insertion holes 26C are formed in the mounting plate 26A of the base member 26, and the bolts 26D inserted into the respective bolt insertion holes 26C are screwed to the mounting base 17F of the operating device mounting box 17, whereby the base member 26 is fixed to the mounting base 17F. On the right side of the upper end of the laterally extending plate 26B, there is provided a stopper 26E protruding upward in a mountain shape.

  The support shaft 27 is provided on a laterally extending plate 26 </ b> B constituting the base member 26. The support shaft 27 is composed of a cylindrical rod-like body extending in the front and rear directions. The base end side (rear end side) of the support shaft 27 is fixed to the central portion of the laterally extending plate 26B, and the distal end side (front end side) of the support shaft 27 protrudes forward from the laterally extending plate 26B.

  The support bracket 28 is attached to a support shaft 27 fixed to the base member 26 so as to be rotatable left and right, and supports the lever front-rear moving mechanism 23 so as to be rotatable left and right about the support shaft 27. To do. The support bracket 28 protrudes downward from the lower surface of the mounting plate 28A, the rectangular mounting plate 28A facing the upper surface plate 17A of the operating device mounting box 17 in the upward and downward directions, and the front and the laterally extending plates 26B of the base member 26, It includes a lower projecting plate 28B facing in the rear direction, and a cylindrical body 28D that fits into a fitting hole 28C formed in the center of the lower projecting plate 28B and projects forward from the lateral projecting plate 26B. Has been.

  As shown in FIG. 5, a support shaft 27 of the base member 26 is inserted into the cylindrical body 28 </ b> D, and two bearings 30 are provided between the cylindrical body 28 </ b> D and the support shaft 27 via spacers 29. ing. A retaining ring 32 is attached to the front end of the support shaft 27 protruding forward from the front end of the cylindrical body 28 </ b> D via a shim (not shown) and a washer 31. Thereby, the cylindrical body 28 </ b> D of the support bracket 28 is retained in the axial direction (front and rear directions) with respect to the support shaft 27 of the base member 26. On the upper surface side of the mounting plate 28A of the support bracket 28, the mounting base 23A of the lever back-and-forth moving mechanism 23 is mounted using a plurality of bolts 28E.

  Accordingly, the lever back-and-forth moving mechanism 23 is supported so as to be rotatable left and right with respect to the operating device mounting box 17 around the support shaft 27 of the lever left-right moving mechanism 25, and is supported by the lever back-and-forth moving mechanism 23. The shift lever 22 protrudes upward through a shift lever insertion hole 19 formed in the upper surface plate 17A of the operating device mounting box 17. The lever back-and-forth movement mechanism 23 has an upright posture in which the shift lever 22 stands upright with respect to the horizontal direction as shown in FIG. 6, and the shift lever 22 inclines toward the right side plate 17E of the operating device mounting box 17 as shown in FIG. It can be switched to two postures, the inclined posture.

  When the lever back-and-forth movement mechanism 23 is in the upright posture, the shift lever 22 is disposed in the intermediate hole 19A of the shift lever insertion hole 19 shown in FIG. 9, and when the lever back-and-forth movement mechanism 23 is in the tilted posture, the shift lever 22 is placed. Is arranged in the right groove hole 19C of the shift lever insertion hole 19. When the lever back-and-forth movement mechanism 23 shifts to the upright posture, the support bracket 28 of the lever left-right movement mechanism 25 contacts the stopper 26E provided on the laterally extending plate 26B of the base member 26. As a result, it is possible to prevent the lever back-and-forth moving mechanism 23 that rotates left and right around the support shaft 27 from tilting leftward beyond the upright posture.

  The guide member 33 is provided on the upper surface plate 17 </ b> A of the operating device mounting box 17 constituting the console box 16. The guide member 33 guides the movement of the shift lever 22 supported by the lever back-and-forth moving mechanism 23 and the lever left-right moving mechanism 25 when moving in the forward, backward, left, and right directions. As shown in FIG. 9 and the like, the guide member 33 includes a substrate 33A formed in a rectangular flat plate shape using a steel plate or the like, a vertical guide groove 33B as a back-and-forth movement guide formed on the substrate 33A, and a substrate 33A. And a lateral guide groove 33C as a neutral holding guide. The horizontal guide groove 33C extends to the left and right in the center in the front and rear directions of the substrate 33A, and the vertical guide groove 33B extends to the front and rear in the right end side of the substrate 33A. 33C extends leftward from an intermediate position in the front and rear directions of the vertical guide groove 33B. Accordingly, the vertical guide groove 33B and the horizontal guide groove 33C are formed in a substantially T shape.

  The guide member 33 used in the present embodiment is constituted by a front divided piece 33F and a rear divided piece 33G which are divided into two at the position of a cutting line 33E extending left and right at the intermediate position in the front and rear directions. Has been. The front divided piece 33F and the rear divided piece 33G have the same shape. For example, when the intermediate portion of the shift lever 22 is sandwiched from the radial direction at the position of the lateral guide groove 33C, the guide member 33 is as shown in FIG. Be combined. The guide member 33 is fixed to the upper surface plate 17A of the operating device mounting box 17 using a bolt 33D in a state where the shift lever insertion hole 19 is covered from above.

  When the lever back-and-forth movement mechanism 23 is in the upright posture shown in FIG. 6, the shift lever 22 engages with the lateral guide groove 33 </ b> C of the guide member 33 as shown in FIG. 3. In this case, since the forward and rearward movement of the shift lever 22 is restricted by the lateral guide groove 33C, even if a part of the operator's body comes into contact with the shift lever 22, the shift occurs against the operator's will. The lever 22 can be prevented from moving forward and backward, and the shift lever 22 can be held in the neutral position.

  On the other hand, when the lever back-and-forth movement mechanism 23 is in the inclined posture shown in FIG. 18, the shift lever 22 engages with the vertical guide groove 33 </ b> B of the guide member 33 as shown in FIG. 16 or FIG. In this case, since the shift lever 22 can move forward and backward along the vertical guide groove 33B, the operator can move the shift lever 22 from the neutral position to the forward movement position or the backward movement position. .

  A seal plate 34 made of an elastic material such as rubber is provided between the upper surface plate 17 </ b> A of the operating device mounting box 17 and the guide member 33. The seal plate 34 has a rectangular flat plate shape that is substantially equal to the substrate 33 </ b> A of the guide member 33. The seal plate 34 is formed with a substantially T-shaped notch groove 34A corresponding to the shape of the longitudinal guide groove 33B and the lateral guide groove 33C of the guide member 33. The groove width of the notch groove 34A is inserted into the notch groove 34A. It is formed to be slightly smaller than the diameter of the middle part of the shift lever 22. The seal plate 34 is sandwiched between the upper surface plate 17A of the operating device mounting box 17 and the guide member 33, so that dust and the like can be collected in the vertical guide groove 33B and the lateral guide groove 33C of the guide member 33, and the shift lever insertion hole. Intrusion into the operating device mounting box 17 through 19 is suppressed.

  The lever urging mechanism 35 is provided in the operating device mounting box 17 of the console box 16 and is disposed in the vicinity of the lever left / right moving mechanism 25. The lever urging mechanism 35 urges the lever left / right moving mechanism 25 to automatically move the shift lever 22 into the lateral guide groove 33 </ b> C of the guide member 33 when the shift lever 22 holds the neutral position. To be engaged. Here, as shown in FIG. 7, the lever urging mechanism 35 includes a reaction force receiving bracket 36 (described later) and a leaf spring 38.

  The reaction force receiving bracket 36 is attached to the mounting base 17 </ b> G of the operating device mounting box 17. The reaction force receiving bracket 36 extends upward and downward and is attached to the mounting base 17G and protrudes rightward from the upper end of the mounting plate 36A toward the right side plate 17E of the operating device mounting box 17. And the reaction force receiving portion 36B. The mounting plate portion 36A and the reaction force receiving portion 36B have an inverted L shape and are connected to each other by a reinforcing plate 36C. Two bolt insertion holes 36D are formed in the mounting plate portion 36A, and the bolt 36E inserted through each bolt insertion hole 36D is screwed to the mounting base 17G of the operating device mounting box 17, thereby providing a reaction force receiving bracket. 36 is fixed to the mounting base 17G. In this state, the reaction force receiving portion 36 </ b> B faces the mounting plate 28 </ b> A of the support bracket 28 constituting the lever left / right moving mechanism 25 with a gap 37 in the upper and lower directions, and a leaf spring 38 is disposed in the gap 37. (See FIG. 6).

  The leaf spring 38 as a spring member is provided between the mounting plate 28 </ b> A of the support bracket 28 and the reaction force receiving portion 36 </ b> B of the reaction force receiving bracket 36. The leaf spring 38 is formed in a rectangular plate shape that extends in the left and right directions using spring steel, and a bent portion 38A is provided on one end side in the length direction (left and right directions). The leaf spring 38 has a fixed end 38B from the bent portion 38A to one end in the length direction, and a free end 38C from the bent portion 38A to the other end in the length direction. The fixed end 38B of the leaf spring 38 is fixed to the left end side (mounting plate portion 36A side) of the reaction force receiving portion 36B using a bolt 38D, and the free end 38C of the leaf spring 38 is upward from the reaction force receiving portion 36B. It extends diagonally upward to the right.

  Here, the length dimension of the free end 38C of the leaf spring 38 is set as large as possible within a range in which the leaf spring 38 can be attached to the reaction force receiving portion 36B. Thereby, when the lever back-and-forth movement mechanism 23 and the shift lever 22 are displaced between the upright posture shown in FIG. 6 and the inclined posture shown in FIG. 18, the amount of bending of the leaf spring 38 can be kept small. The spring 38 has a configuration capable of enhancing the durability.

  The free end 38C of the leaf spring 38 is in contact with the lower surface of the mounting plate 28A of the support bracket 28 with a spring force. For this reason, as shown in FIG. 18, in the state where the lever back-and-forth movement mechanism 23 is in the inclined posture and the shift lever 22 is moved to the forward movement position or the reverse movement position and engaged with the vertical guide groove 33B of the guide member 33, The free end 38C of the spring 38 is kept bent downward (reaction force receiving portion 36B side).

  In this state, the leaf spring 38 moves (rotates) the lever back-and-forth movement mechanism 23 and the shift lever 22 from the inclined posture shown in FIG. 18 to the upright posture shown in FIG. 6 with respect to the mounting plate 28A of the support bracket 28. That is, the shift lever engaged with the vertical guide groove 33B of the guide member 33 applies a biasing force (spring force) in the direction of engaging with the horizontal guide groove 33C. Thus, when the shift lever 22 moves from the forward position or the reverse position to the neutral position, the shift lever 22 is automatically engaged with the lateral guide groove 33C of the guide member 33 by the leaf spring 38 as shown in FIG. It is the composition to do.

  The dump truck 1 according to the first embodiment includes the shift lever device 21 as described above, and the operation thereof will be described below.

  First, when the traveling of the dump truck 1 is stopped, the shift lever 22 is held at the neutral position. In this case, as shown in FIG. 6, when the support bracket 28 of the lever left-right moving mechanism 25 is pressed by the leaf spring 38, the lever back-and-forth moving mechanism 23 and the shift lever 22 hold an upright posture. Thereby, as shown in FIG. 3, the shift lever 22 engages with the lateral guide groove 33 </ b> C of the guide member 33.

  In this state, even if a forward and rearward force is applied to the shift lever 22, the shift lever 22 abuts against the peripheral edge of the lateral guide groove 33C to restrict (prohibit) the forward and rearward movement. ) Therefore, for example, when the operator sits on the driver's seat 13 or leaves the driver's seat 13, even when a part of the operator's body touches the shift lever 22, the shift lever 22 is neutral in the lateral guide groove 33C. The position can be maintained. Therefore, the shift lever 22 can be prevented from switching to the forward position or the reverse position against the operator's will.

  When the dump truck 1 travels forward, the operator moves the shift lever 22 in the direction away from the driver's seat 13 (right direction) along the lateral guide groove 33C of the guide member 33. Accordingly, as shown in FIG. 18, the support bracket 28 of the lever left-right moving mechanism 25 rotates rightward about the support shaft 27. Therefore, the lever back-and-forth moving mechanism 23 supported by the support bracket 28 shifts to the inclined posture inclined toward the right side plate 17E side of the operating device mounting box 17, and is separated from the lateral guide groove 33C of the guide member 33 and is moved to the vertical guide groove. Engage with 33B.

  In this state, the operator moves the shift lever 22 forward along the vertical guide groove 33B. Thereby, as shown in FIG. 16, the shift lever 22 is switched from the neutral position to the forward movement position, and maintains the forward movement position. At this time, an electrical signal corresponding to the forward position of the shift lever 22 is output from the electrical component housed in the box body 23B of the lever back-and-forth movement mechanism 23 toward the controller (both not shown), Carry forward. By operating the steering device 15, the operator can steer the left and right front wheels 4 and control the traveling direction of the vehicle body 2 that travels forward.

  When stopping the dump truck 1 that performs forward traveling, the operator stops traveling of the vehicle body 2 by a brake operation. In this state, the operator moves the shift lever 22 from the advance position to the neutral position along the vertical guide groove 33 </ b> B of the guide member 33. When the shift lever 22 moves to the neutral position, the shift lever 22 is located at a portion where the vertical guide groove 33B and the horizontal guide groove 33C of the guide member 33 intersect.

  At this time, the leaf spring 38 provided between the support bracket 28 and the reaction force receiving bracket 36 of the lever left-right moving mechanism 25 presses the mounting plate 28A of the support bracket 28 upward. Thereby, the lever back-and-forth movement mechanism 23 shifts from the inclined posture shown in FIG. 18 to the upright posture shown in FIG. As a result, the shift lever 22 can be automatically detached from the vertical guide groove 33B of the guide member 33 and engaged with the horizontal guide groove 33C by the spring force (biasing force) of the leaf spring 38.

  On the other hand, when the dump truck 1 travels backward, the operator moves the shift lever 22 along the lateral guide groove 33C of the guide member 33 in a direction away from the driver's seat 13 (right direction). As a result, the lever back-and-forth movement mechanism 23 supported by the support bracket 28 shifts to the inclined posture shown in FIG. 18, and the shift lever 22 is separated from the lateral guide groove 33C of the guide member 33 and engaged with the vertical guide groove 33B. Match.

  In this state, when the operator moves the shift lever 22 rearward along the vertical guide groove 33B, the shift lever 22 is switched from the neutral position to the reverse position as shown in FIG. At this time, an electrical signal corresponding to the reverse position of the shift lever 22 is output from the electrical component housed in the box body 23B of the lever back-and-forth movement mechanism 23 to the controller (both not shown), and the vehicle body 2 moves backward. Run.

  When stopping the dump truck 1 that performs reverse travel, the operator stops travel of the vehicle body 2 by a brake operation, and then shifts the shift lever 22 from the reverse position to the neutral position along the vertical guide groove 33B of the guide member 33. Move to. When the shift lever 22 shifts to the neutral position, the lever back-and-forth movement mechanism 23 shifts from the inclined posture shown in FIG. 18 to the upright posture shown in FIG. 6 by the leaf spring 38 of the lever urging mechanism 35. As a result, the shift lever 22 can automatically disengage from the vertical guide groove 33B of the guide member 33 and engage with the horizontal guide groove 33C.

  As described above, when the shift lever 22 is moved from the forward position or the reverse position to the neutral position in order to stop the dump truck 1, the shift lever 22 is brought upright from the inclined posture by the leaf spring 38 of the lever biasing mechanism 35. It can be shifted to the posture. As a result, the shift lever 22 in the neutral position can be automatically engaged with the lateral guide groove 33C of the guide member 33, and erroneous operation due to unintentionally touching the shift lever 22 can be suppressed.

  Thus, according to the present invention, when the dump truck 1 stops and the shift lever 22 holds the neutral position, the shift lever 22 is engaged with the lateral guide groove 33C of the guide member 33, so that the shift lever 22 is engaged. However, the movement from the neutral position to the forward movement position or the reverse movement position can be restricted (prohibited). As a result, even if a part of the operator's body touches the shift lever 22 held in the neutral position, the shift lever 22 can be prevented from being switched to the forward position or the reverse position against the operator's will. An erroneous operation on the shift lever 22 can be prevented.

  The operating device mounting box 17 is provided with a lever urging mechanism 35 for urging the lever left-right moving mechanism 25 to engage the shift lever 22 that holds the neutral position with the lateral guide groove 33C of the guide member 33. It has been. Thus, when the shift lever 22 is switched from the forward position or the reverse position to the neutral position, the shift lever 22 can be automatically engaged with the lateral guide groove 33C of the guide member 33 by the lever urging mechanism 35. .

  The lever lateral movement mechanism 25 includes a base member 26 attached to the operation device attachment box 17, a support shaft 27 provided on the base member 26 and extending in the front and rear directions, and a lever longitudinal movement about the support shaft 27. A support bracket 28 that supports the mechanism 23 so as to be rotatable in the left and right directions is included. Thereby, the shift lever 22 supported by the lever back-and-forth movement mechanism 23 can be rotated left and right about the support shaft 27.

  The lever urging mechanism 35 includes a reaction force receiving bracket 36 attached to the operating device mounting box 17 and a leaf spring 38 provided between the lever left / right moving mechanism 25 and the reaction force receiving bracket 36. ing. Accordingly, the leaf spring 38 always urges the lever left-right moving mechanism 25 in a direction in which the shift lever 22 engages with the lateral guide groove 33 </ b> C of the guide member 33. Accordingly, when the shift lever 22 is moved to the neutral position, the shift lever 22 can be automatically engaged with the lateral guide groove 33C of the guide member 33 by the spring force (biasing force) of the leaf spring 38.

  The lever back-and-forth movement mechanism 23 is provided with a long groove 23E that allows movement when the shift lever 22 is switched to the forward position or the reverse position with respect to the neutral position. The shift lever 22 follows the movement of the shift lever 22. Thus, a slide cover 24 that moves forward and backward is provided. Thereby, when the shift lever 22 is moved in the forward and backward directions, the long groove 23E of the lever longitudinal movement mechanism 23 can be always closed by the slide cover 24. As a result, it is possible to suppress dust and the like from entering the long groove 23E of the lever back-and-forth movement mechanism 23, and the shift lever 22 can be smoothly moved over a long period of time.

  Further, the guide member 33 has a longitudinal guide groove 33B as a longitudinally moving guide extending in the front and rear directions, and a neutral holding extending in the left and right directions from an intermediate position in the front and rear directions of the longitudinal guide groove 33B. A lateral guide groove 33C as a guide is provided. Thus, the operator can switch the shift lever 22 to the forward position or the reverse position by moving the shift lever 22 forward and backward along the vertical guide groove 22C.

  Next, FIG. 19 to FIG. 25 show a second embodiment of the present invention. A feature of the second embodiment is that the neutral holding guide of the guide member is constituted by a lateral guide groove extending in the left and right directions, and the front and rear movement guide is forwarded from one end of the lateral guide groove in the left and right directions. And a rear vertical guide groove extending rearward from the left and right other ends of the horizontal guide groove. Note that, in the second embodiment, the same components as those in the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted.

  The shift lever device 41 according to the second embodiment is provided on the front side of the operating device mounting box 17 constituting the console box 16 as in the case of the first embodiment. The shift lever device 41 is substantially the same as the shift lever device 21 according to the first embodiment. The shift lever 22, the lever back-and-forth movement mechanism 23, the lever left-right movement mechanism 25, a guide member 42 described later, and a lever And a biasing mechanism 44. However, the shift lever device 41 is different in configuration of the guide member 42 and the lever urging mechanism 44 from that of the first embodiment.

  The guide member 42 is provided on the upper surface plate 17A of the operating device mounting box 17, and guides the movement when the shift lever 22 moves forward, backward, left, or right. As shown in FIG. 21 and the like, the guide member 42 includes a substrate 42A formed in a rectangular flat plate shape using a steel plate material and the like, a lateral guide groove 42B as a neutral holding guide formed on the substrate 42A, and a back and forth movement The front vertical guide groove 42C and the rear vertical guide groove 42D are used as a guide. The lateral guide groove 42B extends in the left and right directions in the front and rear central portions of the substrate 42A. The front vertical guide groove 42C extends forward from the right end that is one end of the left and right directions of the horizontal guide groove 42B, and the rear vertical guide groove 42D is the left end that is the other end of the left and right directions of the horizontal guide groove 42B. It extends backward from. Thereby, the horizontal guide groove 42B, the front vertical guide groove 42C, and the rear vertical guide groove 42D are formed in a substantially Z shape as a whole.

  The guide member 42 includes a front divided piece 42G and a rear divided piece 42H which are divided into two at the position of a cutting line 42F extending in the left and right directions at an intermediate position in the front and rear directions. The front divided piece 42G and the rear divided piece 42H have the same shape, and are combined as shown in FIG. 21 by sandwiching the middle part of the shift lever 22 from the radial direction at the position of the lateral guide groove 42B. The operation device mounting box 17 is fixed to the upper surface plate 17A using bolts 42E.

  When the lever back-and-forth movement mechanism 23 is in the upright posture shown in FIG. 20, the shift lever 22 engages with the lateral guide groove 42 </ b> B of the guide member 42 as shown in FIG. 19. In this case, the movement of the shift lever 22 in the front and rear directions is restricted by the lateral guide groove 42B, and the shift lever 22 is held in the neutral position.

  On the other hand, as shown in FIG. 23, the lever back-and-forth moving mechanism 23 is in a right-tilting posture inclined rightward (on the right side plate 17E side of the operating device mounting box 17) about the support shaft 27 of the lever left-right moving mechanism 25. Sometimes, as shown in FIG. 22, the shift lever 22 engages with the front longitudinal guide groove 42 </ b> C of the guide member 42. In this case, the shift lever 22 can move forward and backward along the front longitudinal guide groove 42C, so that the operator can move the shift lever 22 from the neutral position to the forward movement position.

  Further, as shown in FIG. 25, the lever back-and-forth moving mechanism 23 is in a left inclined posture inclined leftward (on the left side plate 17D side of the operating device mounting box 17) about the support shaft 27 of the lever left-right moving mechanism 25. Sometimes, as shown in FIG. 24, the shift lever 22 engages with the rear longitudinal guide groove 42 </ b> D of the guide member 42. In this case, the shift lever 22 can move forward and backward along the rear longitudinal guide groove 42D, so that the operator can move the shift lever 22 from the neutral position to the reverse position.

  The shift lever device 41 includes a detent mechanism (a detent mechanism for stopping the lever back-and-forth movement mechanism 23 in the right-tilt posture shown in FIG. 23 when the lever back-and-forth movement mechanism 23 rotates rightward about the support shaft 27. And a detent mechanism (not shown) for stopping the lever back-and-forth moving mechanism 23 in the left inclined posture shown in FIG. 25 when the lever back-and-forth moving mechanism 23 rotates leftward about the support shaft 27. ) And are provided.

  A seal plate 43 made of an elastic material such as rubber is provided between the upper surface plate 17A of the operating device mounting box 17 and the guide member 42. A substantially Z-shaped notch groove 43A corresponding to the lateral guide groove 42B, the front longitudinal guide groove 42C, and the rear longitudinal guide groove 42D of the guide member 42 is formed in the seal plate 43, and the shift lever 22 is provided in the notch groove 43A. It is inserted. The seal plate 43 is sandwiched between the upper surface plate 17 </ b> A of the operating device mounting box 17 and the guide member 42, thereby preventing dust and the like from entering the operating device mounting box 17.

  The lever urging mechanism 44 is provided in the operating device mounting box 17 and is disposed in the vicinity of the lever left-right moving mechanism 25. The lever urging mechanism 44 urges the lever left / right moving mechanism 25 to automatically move the shift lever 22 into the lateral guide groove 42 </ b> B of the guide member 42 when the shift lever 22 holds the neutral position. To be engaged. Here, the lever urging mechanism 44 includes a reaction force receiving bracket 36, and a first plate spring 45 and a second plate spring 46 described later.

  The first plate spring 45 and the second plate spring 46 as spring members are provided between the mounting plate 28A of the support bracket 28 and the reaction force receiving portion 36B of the reaction force receiving bracket 36. The 1st leaf | plate spring 45 and the 2nd leaf | plate spring 46 are formed in the rectangular plate shape extended in the left and right direction using spring steel.

  The first leaf spring 45 is provided with a bent portion 45A on one end side in the length direction (left and right directions), and a portion between the bent portion 45A and one end portion in the length direction becomes a fixed end 45B. A free end 45C extends from the portion 45A to the other end in the length direction. The fixed end 45B of the first leaf spring 45 is fixed to the left end side (mounting plate portion 36A side) of the reaction force receiving portion 36B using a bolt 45D. The free end 45C of the first leaf spring 45 extends upward and obliquely upward from the reaction force receiving portion 36B, and is in contact with the lower surface of the mounting plate 28A of the support bracket 28 with a spring force. For this reason, as shown in FIGS. 22 and 23, in the state in which the lever back-and-forth movement mechanism 23 is in the right inclined posture and the shift lever 22 is moved to the forward movement position and engaged with the front longitudinal guide groove 42C of the guide member 42. The free end 45C of the first leaf spring 45 is kept bent downward.

  The second leaf spring 46 is provided with a bent portion 46A on the other end side in the length direction (left and right directions), and a fixed end 46B from the bent portion 46A to the other end portion in the length direction. A free end 46C is formed between the bent portion 46A and one end portion in the length direction. The fixed end 46B of the second leaf spring 46 is fixed to the right end side of the reaction force receiving portion 36B (the side opposite to the mounting plate portion 36A) using a bolt 46D. The free end 46C of the second leaf spring 46 extends obliquely upward to the left from the reaction force receiving portion 36B, and is in contact with the lower surface of the mounting plate 28A of the support bracket 28 with a spring force. For this reason, as shown in FIGS. 24 and 25, in the state in which the lever back-and-forth movement mechanism 23 is in the left inclined posture and the shift lever 22 is moved to the reverse position and engaged with the rear longitudinal guide groove 42D of the guide member 42. The free end 46C of the second leaf spring 46 is kept bent downward.

  The dump truck 1 according to the second embodiment includes the shift lever device 41 as described above, and the operation thereof will be described below.

  First, when the traveling of the dump truck 1 is stopped, the shift lever 22 is held at the neutral position. In this case, as shown in FIG. 20, when the support bracket 28 of the lever lateral movement mechanism 25 is pressed by the first leaf spring 45 and the second leaf spring 46, the lever longitudinal movement mechanism 23 takes an upright posture. Hold. Thereby, as shown in FIG. 19, the shift lever 22 engages with the lateral guide groove 42 </ b> B of the guide member 42.

  In this state, even if a forward / rearward force is applied to the shift lever 22, the shift lever 22 is restricted (prohibited) from moving forward / rearward by contacting the peripheral edge of the lateral guide groove 42B. ) Therefore, for example, when the operator sits on the driver's seat 13 or leaves the driver's seat 13, even when a part of the operator's body touches the shift lever 22, the shift lever 22 is neutral in the lateral guide groove 42B. The position can be maintained. Therefore, the shift lever 22 can be prevented from switching to the forward position or the reverse position against the operator's will.

  When the dump truck 1 is caused to travel forward, the operator moves the shift lever 22 along the lateral guide groove 42B of the guide member 42 in a direction away from the driver's seat 13 (right direction). Accordingly, as shown in FIG. 23, the support bracket 28 of the lever left-right moving mechanism 25 is rotated rightward about the support shaft 27. Accordingly, the lever back-and-forth movement mechanism 23 supported by the support bracket 28 shifts to the right inclined posture, and is separated from the horizontal guide groove 42B of the guide member 42 and engaged with the front vertical guide groove 42C. In this state, the operator moves the shift lever 22 forward along the front longitudinal guide groove 42C. Thereby, as shown in FIG. 22, the shift lever 22 can be switched from the neutral position to the forward position, and the dump truck 1 can be moved forward.

  When stopping the dump truck 1 that performs forward travel, the operator moves the shift lever 22 forward along the front longitudinal guide groove 42C of the guide member 42 in a state where travel of the dump truck 1 is stopped by a brake operation. To move to the neutral position. When the shift lever 22 moves to the neutral position, the shift lever 22 is located at a portion where the lateral guide groove 42B and the front longitudinal guide groove 42C of the guide member 42 intersect. At this time, as shown in FIG. 23, the first plate spring 45 presses the mounting plate 28A of the support bracket 28 upward, so that the lever back-and-forth moving mechanism 23 changes from the right inclined posture to the upright posture shown in FIG. Transition. As a result, the shift lever 22 can be automatically detached from the front longitudinal guide groove 42C of the guide member 42 and engaged with the lateral guide groove 42B by the spring force (biasing force) of the first leaf spring 45.

  On the other hand, when the dump truck 1 travels backward, the operator moves the shift lever 22 in a direction (left direction) approaching the driver's seat 13 along the lateral guide groove 42 </ b> B of the guide member 42. As a result, as shown in FIG. 25, the lever back-and-forth movement mechanism 23 supported by the support bracket 28 shifts to the left inclined posture, and is disengaged from the lateral guide groove 42B of the guide member 42 and engaged with the rear longitudinal guide groove 42D. Match. In this state, the operator moves the shift lever 22 rearward along the rear longitudinal guide groove 42D. Accordingly, as shown in FIG. 24, the shift lever 22 can be switched from the neutral position to the reverse position, and the dump truck 1 can be moved backward.

  When stopping the dump truck 1 that performs reverse travel, the operator moves the shift lever 22 in the reverse position along the rear vertical guide groove 42D of the guide member 42 while stopping the travel of the dump truck 1 by a brake operation. To move to the neutral position. When the shift lever 22 moves to the neutral position, the shift lever 22 is located at a portion where the lateral guide groove 42B and the rear longitudinal guide groove 42D of the guide member 42 intersect. At this time, as shown in FIG. 25, the second leaf spring 46 presses the mounting plate 28A of the support bracket 28 upward, so that the lever longitudinal movement mechanism 23 changes from the left inclined posture to the upright posture shown in FIG. Transition. As a result, the shift lever 22 can automatically disengage from the rear longitudinal guide groove 42D of the guide member 42 and engage with the lateral guide groove 42B by the spring force (biasing force) of the second leaf spring 46.

  Thus, also in the second embodiment, when the shift lever 22 is moved from the forward movement position to the neutral position, the lever back-and-forth movement mechanism 23 is moved from the right inclined position to the upright position by the first leaf spring 45 of the lever urging mechanism 44. When the shift lever 22 is moved from the reverse drive position to the neutral position, the lever back-and-forth movement mechanism 23 is shifted from the left inclined position to the upright position by the second leaf spring 46 of the lever urging mechanism 44. Can do. As a result, the shift lever 22 in the neutral position can be automatically engaged with the lateral guide groove 42B of the guide member 42, and erroneous operation due to unintentionally touching the shift lever 22 can be suppressed.

  In this case, the guide member 42 includes a lateral guide groove 42B extending in the left and right directions, a front longitudinal guide groove 42C extending forward from one end side in the left and right directions of the lateral guide groove 42B, and a lateral guide. A rear longitudinal guide groove 42D extending rearward from the other end side in the left and right directions of the groove 42B is provided. Thus, when the shift lever 22 is switched from the forward position to the reverse position or from the reverse position to the forward position, the shift lever 22 always passes through the lateral guide groove 42B. As a result, for example, when the dump truck 1 that travels forward is switched to reverse travel, the shift lever 22 is prevented from being continuously switched from the forward position to the reverse position, and the traveling direction of the dump truck 1 is suddenly switched. Can be suppressed.

  In the first embodiment, the case where the vertical guide groove 33B of the guide member 33 is disposed at a position away from the driver's seat 13 and the lateral guide groove 33C is disposed on the driver's seat 13 side is illustrated. However, the present invention is not limited to this. For example, a longitudinal guide groove 33B ′ is arranged on the driver's seat 13 side, such as a guide member 33 ′ according to a modification shown in FIG. It is good also as a structure which arrange | positions the horizontal guide groove 33C '.

  Further, in the first embodiment, a case where a leaf spring 38 is used as a spring member constituting the lever urging mechanism 35 is illustrated. However, the present invention is not limited to this. For example, a compression coil spring or the like may be used instead of the leaf spring 38. The same applies to the first leaf spring 45 and the second leaf spring 46 used in the second embodiment.

2 Car body 3 Loading platform 11 Cab 13 Driver's seat 15 Steering device 16 Console box 21 and 41 Shift lever device 22 Shift lever 23 Lever forward / backward moving mechanism 23E Long groove 24 Slide cover 25 Lever left / right moving mechanism 26 Base member 27 Support shaft 28 Support bracket 33, 42, 33 'guide member 33B, 33B' vertical guide groove (front and rear movement guide)
33C, 42B, 33C 'Lateral guide groove (neutral holding guide)
42C Front longitudinal guide groove (back and forth movement guide)
42D Rear vertical guide groove (back and forth movement guide)
35, 44 Lever urging mechanism 36 Reaction force receiving bracket 38 Leaf spring (spring member)
45 First leaf spring (spring member)
46 Second leaf spring (spring member)

Claims (7)

A self-propelled vehicle body, a loading platform provided on the vehicle body so as to be tiltable, and loaded with a load, and a cab located on the front side of the loading platform and provided on the vehicle body to define a driver's cab,
Provided in the cab is a driver's seat, a steering device that is disposed on the front side of the driver's seat and controls the traveling direction of the vehicle body, a console box that is disposed on the side of the driver's seat, and the console box. In a transport vehicle comprising a shift lever device that switches between forward and backward movement of the vehicle body by operating a shift lever,
The shift lever device includes the shift lever protruding upward from the console box, and a forward position that is provided in the console box and that moves the vehicle body forward with respect to a neutral position that stops the vehicle body from traveling. Or a lever back-and-forth movement mechanism that supports the vehicle body to move backward and forward to a reverse position for moving the vehicle backward, and the lever back-and-forth movement mechanism together with the shift lever provided in the console box to the left with respect to the console box, A lever left-right moving mechanism that is supported so as to be movable in the right direction, and a guide member that is provided on the upper surface of the console box and guides the movement when the shift lever moves in the forward, backward, left, or right direction;
The guide member is engaged when the shift lever moves from the neutral position to the forward position or the reverse position, and engaged when the shift lever holds the neutral position. Thus, the transport vehicle is provided with a neutral holding guide that restricts the shift lever from moving to the forward position or the reverse position.   The console box is provided with a lever urging mechanism for engaging the shift lever, which holds the neutral position by urging the lever lateral movement mechanism, with the neutral holding guide of the guide member. The transport vehicle according to 1.   The lever left-right moving mechanism includes a base member attached to the console box, a support shaft provided on the base member and extending in the front and rear directions, and the lever back-and-forth movement mechanism centered on the support shaft. The transport vehicle according to claim 1 or 2, comprising a support bracket that is rotatably supported in a direction.   The lever urging mechanism is provided between a reaction force receiving bracket attached to the console box, and the lever left / right moving mechanism and the reaction force receiving bracket. The lever left / right moving mechanism is connected to the guide by the shift lever. The transport vehicle according to claim 2, comprising a spring member that urges a member in a direction to engage with the neutral holding guide.   The lever back-and-forth movement mechanism is provided with a long groove that allows the shift lever to move when the shift lever moves forward and backward with respect to the neutral position, and the shift lever is moved forward and backward. 5. The transport vehicle according to claim 1, 2, 3, or 4, wherein a slide cover that closes the long groove by moving forward and backward following the shift lever is sometimes provided.   The front-rear movement guide of the guide member is configured by a longitudinal guide groove extending in the front and rear directions, and the neutral holding guide of the guide member is left from an intermediate position in the front and rear directions of the longitudinal guide groove, 6. The transport vehicle according to claim 1, 2, 3, 4 or 5, comprising a lateral guide groove extending in the right direction.   The neutral holding guide of the guide member is constituted by a lateral guide groove extending in the left and right directions, and the longitudinal movement guide of the guide member extends forward from one end of the lateral guide groove in the left and right directions. 6. The front longitudinal guide groove that is present and the rear longitudinal guide groove that extends rearward from the left and right other ends of the lateral guide groove, respectively, according to claim 1, 2, 3, 4, or 5. Transportation vehicle.

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