JP2002073187A - Steering device for working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steering device for working vehicle with high operability. SOLUTION: In a steering device 9 for working vehicle provided with a hand supporting part 13 located on one side of left and right sides of an operator seat 6 and plural operating means 15, 22, 23 and 24 located closely to the hand supporting part 13 for applying an instruction to each of various control functions of a working vehicle, this device is provided with an operating part 20, with which at least one of plural operating means 15, 22, 23 and 24 is mounted, and varying means 31 and 33 for changing the relative positions of the hand supporting part 13 and the operating part 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a working vehicle.

[0002]

2. Description of the Related Art In a working vehicle equipped with various working machines, an operator usually operates the vehicle with one hand and operates the working machine with the other hand. In a working vehicle that works on uneven terrain, the operator's body shakes due to the vibration and impact of the vehicle, and this shaking is transmitted to various devices that the operator grips and operates, thereby impeding the operation originally intended by the operator. There's a problem. As a prior art for solving this problem, Japanese Patent Laid-Open No. 11-3 shown in FIG.
No. 38568, a work vehicle steering device 90 disclosed in
There is. That is, on the upper surface of the armrest 7, a sidewall 11 that is raised upward is provided on a side portion outside the operator seat along the longitudinal direction of the armrest 7. And in the front part of the side wall 11,
Hand grip 63 protruding toward operator seat
Is provided. A seesaw-type speed-stage changeover switch 64 is provided on the rear surface of the distal end of the handgrip 63. The forward, neutral, and reverse travels are selected on the upper surface 12 of the armrest 7 below the distal end of the handgrip 63. A forward / backward changeover switch 65 is provided for changing over. Further, a steering lever 1 for performing left and right steering operations at a predetermined distance away from the hand grip 63.
5 are provided.

[0003] Even if a large vibration or impact is generated in the vehicle by the operating device 90 of the work vehicle, the operator presses the forearm placed on the upper surface 12 of the armrest 7 against the sidewall 11. While holding the hand grip 63 by hand, the hand can be fixed so that the position of the hand on which the operation is performed does not swing. This makes it possible to stably operate the levers and switches for operating various functions of the vehicle even if the operator's body is shaken by vibration or impact of the vehicle due to running on uneven terrain or the like.

[0004]

However, the prior art has the following problems. That is,
Since the operation of the steering lever 15 is operated with any finger from the index finger to the little finger, when the hand grip 63 is gripped, the position where the hand grip 63 is gripped is the steering lever 1.
It is determined by the position of 5. For this reason, depending on individual differences in the length of the thumb, the position of the operation unit (speed step changeover switch 64, forward / reverse changeover switch 65) by the thumb is too far or too close, and the thumb is bent or the hand grip 6 is moved.
Operation to re-grip 3 is required, and operability is poor.

In a work vehicle such as a bulldozer, work is performed by repeating forward and backward movements alternately.
With the conventional forward / reverse changeover switch 65, the operability is not good because it is always operated via the neutral position required when stopping, such as "forward → neutral → reverse" or "reverse → neutral → forward". . In addition, even when switching back and forth at once to avoid danger, the emergency operation cannot be performed because the vehicle passes through the neutral position.

Further, if the switches are arranged in a cluttered manner, it is necessary to operate the switches while visually observing the switches each time the operation is performed, resulting in poor operability. When the thumb is turned at a position where the thumb is turned below the hand grip 63 and the hand grip 63 is gripped, the operability is deteriorated because the thumb is away from the switches at the thumb position. If the thumb is brought to the speed gear switch 64, which is the natural position of the thumb when gripped, the speed gear switch 64 may be erroneously operated due to the vibration or impact of the work vehicle. If the thumb is brought above or below the switch 64, the thumb position is different from the natural position, causing fatigue and poor operability.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a control device for a work vehicle with good operability.

[0008]

Means for Solving the Problems, Functions and Effects In order to achieve the above object, a hand support provided on one of the left and right sides of the operator seat, and a hand support provided near the hand support, In a steering device for a work vehicle, comprising a plurality of operation means for giving instructions to various control functions of the work vehicle, an operation unit equipped with at least one of the plurality of operation means, a hand support unit, and an operation unit A variable means for changing a relative position with respect to the unit.

That is, the operator can grip the hand support and position the operation unit at a position where the operation means mounted on the operation unit near the hand support can be easily operated with the thumb. Thereby, even if there is an individual difference in the length of the thumb or the natural position of the thumb, the operator can fix the operation unit at a position where the operator can easily operate, so that the operability can be improved.

Further, a hand support provided on one of the left and right sides of the operator's seat and a hand support provided near the hand support for forward switching, forward switching and neutral switching control of the work vehicle. One of neutral, reverse
Forward / backward switching means for giving one instruction, the forward / backward switching means comprises: forward / backward selecting means for selecting either forward or backward of the working vehicle; And neutral indicating means for indicating neutrality.

That is, since the forward / reverse switching means is divided into forward / reverse selecting means and neutral instructing means, in a work vehicle which performs work by repeating forward and backward movements, the forward / backward movement is performed without passing through the neutral instructing position. The operation for switching to the reverse can be performed, and the operation is not troublesome. When the neutral indicating means is disposed farther from the hand support than the forward / reverse selecting means, the operation of the frequently used forward / backward selecting means becomes easier and the distant neutral indicating means is operated by mistake. Can be prevented.

Further, a hand support provided on one of the left and right sides of the operator seat, and a plurality of operating means provided near the hand support and providing instructions to various control functions of the work vehicle are provided. In the operating device for a work vehicle provided with the operating unit, at least two of the plurality of operating units are mounted, and the operating unit provided on the operating unit is separated into a plurality of groups. And a separating portion that performs the separation.

That is, since the operation means mounted on the operation section is separated into a plurality of groups by the separation section, the operator places the thumb on the separation section as the home position of the thumb and operates the operation means. When performing the operation, the thumb is moved from the separation unit and the operation is performed, so that the operability is improved without having to visually check the operation unit. Further, when the operation of the operation means is not required, the thumb can be placed on the separation part and rested, so that fatigue can be prevented.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a bulldozer 100 as an example of a work vehicle to which a steering device according to the present invention is applied. As shown in the figure, a bulldozer 100 is a construction machine having a working machine mounted on the front and rear of a vehicle body 1 having a pair of crawler tracks on the left and right with respect to the traveling direction. Equipped with a blade 3
In addition, an attachment (not shown) such as a ripper or a winch may be attached to the rear of the vehicle body 1 depending on the work purpose. An engine room 4 is arranged in the front of the vehicle body 1, and a cabin 5 for an operator is installed behind the engine room 4.

FIG. 2 is a perspective view showing the inside of the cabin 5. An operator seat 6 is disposed substantially at the center of a rear portion in the cabin 5, and in front of armrests 7 and 8 provided on the left and right sides of the operator seat 6 substantially in the front-rear direction of the work vehicle, respectively, a bulldozer 100 is operated. A device 9 and a work implement operating device are provided. In FIG. 2, in front of the left armrest 7, there is provided a control device 9 in which operation levers and switches for performing vehicle control are provided around the hand grip in a concentrated manner. The bulldozer 100 can perform forward / reverse switching, steering, and traveling speed shift. Further, a blade operating lever 10a for performing operations such as raising and lowering and tilting the blade 3 is provided in front of the right armrest 8, and a ripper operating lever for operating, for example, elevating and lowering a ripper is provided near the outer rear portion of the armrest 8. 10b
Is installed. In the present invention, the installation position of the control device 9 is not limited to the left side of the operator seat 6 but may be the right side.

A first embodiment of the control device 9 of the present invention will be described with reference to FIGS. FIG. 3 is a perspective view of the control device 9, and FIG. 4 is a view of the control device 9 as viewed from the front side. The armrest 7 attached to the upper surface of the armrest bracket 17 has an upper surface 12 having a substantially flat surface along the armrest 7 or a curved surface with a gentle undulation inside the upper surface of the armrest 7. Further, the armrest 7 has a sidewall 11 that is raised substantially upward along a longitudinal direction of the armrest 7 on a side portion on the outer side of the upper surface of the armrest 7.

At a front portion of the side wall 11, a hand grip 13 which is a hand supporting portion protruding toward the operator seat 6 is provided at a predetermined distance from the upper surface 12 of the armrest 7. A slide rail 31 is attached to the lower part of the hand grip 13 along the longitudinal direction of the hand grip 13. The slide rail 31 having the inner guide 31a and the outer guide 31b has an inner guide 31a attached to the hand grip 13, and an outer guide 31b having a ball joint 33 attached to an end of the operator seat 6 slides with the inner guide 31a. It is possible to tighten the bolts 31c so that the inner guide 31
a and the outer guide 31b can be fixed.

An operation unit 20 having a forward / backward changeover switch 21 and a speed stage changeover switch 24 is provided on the side of the distal end of the handgrip 13 on the operator seat 6 side via a ball joint 33 and a slide rail 31. It is provided at a position separated by a predetermined distance from the tip of the hand grip 13. The operation unit 20 has a substantially semi-elliptical shape having a substantially elliptical upper surface 20 a, and the shorter direction of the upper surface 20 a substantially matches the longitudinal direction of the hand grip 13.

A block-shaped finger rest 25 is attached to the center of the upper surface 20a. A speed gear changeover switch 24 is provided on the rear side of the vehicle with the finger rest 25 interposed therebetween. , A forward / backward changeover switch 21 is attached. The speed stage changeover switch 24 is a seesaw switch for instructing a speed stage changeover of a transmission (not shown).
The rotation axis of the seesaw operation is inclined approximately 10 degrees clockwise with respect to the central axis 3 and is attached to the upper surface 20 a slightly closer to the hand grip 13. The upper surface of the speed stage changeover switch 24 has a concave shape in which the end on the finger rest 25 side is lower than the other end. When the speed-up operation section (U), which is the finger rest 25 side, is pressed once, the speed-stage changeover switch 24 switches the speed stage to the speed-up side in a stepwise manner, and performs the deceleration operation at the other side (vehicle rear side). Part (D) is 1
Pressing it twice switches the speed step to the deceleration side stepwise.

A forward / reverse selector switch 21 for selecting and switching between forward, neutral and reverse is provided with a forward / reverse selector switch 22.
And a neutral instruction switch 23. The forward / reverse selection switch 22 is a seesaw switch that selects forward and reverse and instructs switching.
The rotation axis of the seesaw operation is tilted approximately 10 degrees counterclockwise with respect to the center axis of No. 3 and is attached to the upper surface 20a slightly closer to the hand grip 13. The upper surface of the forward / reverse selection switch 22 has a concave shape in which the end on the finger rest 25 side is lower than the other end. The forward / reverse selector switch 22 selects reverse when the reverse operation unit (R) on the finger rest 25 side is pressed, and selects forward when the forward operation unit (F) on the other side (vehicle front side) is pressed. . The neutral indicating switch 23 is a push button switch for indicating neutral, and is attached to the upper surface 20a alongside the forward / reverse selection switch 22 on the side of the forward / backward selection switch 22 on the operator seat 6 side. The push button portion (N) of the neutral indication switch 23 is higher than the end of the forward / reverse selection switch 22 on the finger rest 25 side by a predetermined height.

A steering lever 15 for performing left-right steering operation is provided in front of the hand grip 13 at a predetermined distance. The steering lever 15 projects substantially vertically upward from the vicinity of the front end of the upper surface 12 of the armrest 7, and is provided with a lever shaft 16 provided rotatably around the axis.
This is a mono lever having a substantially T-shape when viewed from the front, having an operation grip 15a attached to the upper end of the lever shaft 16. The operation grip 15a is a hand grip 1
3 and is arranged so as to be substantially parallel to the longitudinal direction of the handgrip 13. In FIG. 4, the steering lever 15 is omitted in order to avoid complicating and obscuring the drawing.

With the above configuration, the hand grip 13 and the operation unit 20 are connected via the slide rail 31 and the ball joint 33, which are variable mechanisms, so that the relative position and the relative direction can be changed. That is, before the operator starts work, the slide rail 3
1 and the ball joint 33 are released, and the hand grip 13 which is a hand supporting portion is gripped at a position where the steering lever 15 can be easily operated. After the operation unit 20 is positioned at a position where it is easy to operate
And the ball joint 33 is fixed. For this reason, even if there is an individual difference in the size of the operator's hand (especially, the length of the thumb), and even if there is an individual difference in the natural position of the thumb, the operation unit 20 can be easily operated by the user. Can be fixed. This can prevent an unreasonable posture or movement of the thumb, thereby improving operability.

In a normal working mode of a work vehicle such as a bulldozer, a cycle of performing a work such as pushing and excavating while moving forward by a predetermined distance, and moving backward to a position near a position before the forward movement is repeated, and a forward / reverse changeover switch is operated. Neutral is when the vehicle is stopped. In the present embodiment, the forward / reverse selector switch 21 is set to the forward / reverse selection switch 2.
2 and a neutral instruction switch 23. For this reason,
When switching between forward and reverse movements in normal work, there is no need to operate via the neutral position as in the related art, so the operation is easy and easy. In addition, it is possible to perform an abrupt operation when switching between forward and backward for the avoidance of danger. Further, a neutral instruction switch 23 is provided as a device for performing a neutral instruction operation that is infrequently used, and the neutral instruction switch 23 is disposed farther from the handgrip 13 holding the neutral instruction switch 23 than the forward / reverse selection switch 22. Erroneous operation such as neutralization can be prevented.

A finger rest 25 is provided between the forward / reverse selector switch 21 and the speed gear selector switch 24 of the operation unit 20. When the operator grips the handgrip 13, the thumb rests naturally. Thus, the operation unit 20 can be positioned and fixed by the slide rail 31 and the ball joint 33 which are variable mechanisms so that the thumb can be placed on the finger rest 25. By fixing in this manner, when the forward / backward switching operation or the speed gear switching operation is not performed during the operation, the finger rest 25 at the position where the thumb is settled is set as the home position of the thumb, and the thumb is used as the finger rest 25. Can rest on the floor and prevent fatigue. The finger rest 25 is used as the home position of the thumb, and the switches of the operation unit 20 are operated by the finger rest 25 into two groups according to function (forward / backward switching and speed stage switching).
Are separated. For this reason, when performing the switching operation, since the thumb is moved forward or backward from the finger rest 25 to operate, the switch does not have to be looked at one by one, so that the operability is improved and erroneous operation can be prevented.

The forward operation section (F) of the forward / reverse selection switch 22, the reverse operation section (R), and the finger rest 25
A speed-increasing operation unit (U) of the speed stage changeover switch 24;
The deceleration operation section (D) is arranged along a substantially arc shape opened to the hand grip 13 side when viewed from above, so that the operator holds the hand grip 13 and moves from the base of the thumb to each operation section. Are approximately equal, and the thumb can easily operate each of the operation units in the same manner. Further, since the operation units (F, D) on the far side from the finger rest 25 are higher than the operation units (R, D) closer to the finger rest 25, each of the operation units (F, D) does not need to keep an eye on the operation unit 20. The operation unit can be distinguished, and the thumb rests on the finger rest 2
5, it is easy to reach the operation units (F, D) on the far side, so that the operability is improved. Further, since the push button portion (N) of the neutral instruction switch 23 is higher than the reverse operation portion (R) of the forward / reverse selection switch 22, the operator re-grips the hand grip 13 and presses the neutral instruction switch 23. In this case, the reverse operation section (R) of the forward / reverse selection switch 22 is not erroneously pressed, and erroneous operation can be prevented.

In the present embodiment, the slide rail 31 is mounted on the hand grip 13. However, as shown in FIG. 5, the slide rail 31 is substantially parallel to the upper surface 12 of the armrest 7 in the longitudinal direction of the hand grip 13. It is needless to say that the same operation and effect can be obtained by mounting the slide rail 31 so as to fix the operation unit 20 so that In addition, although the example in which the slide rail 31 and the ball joint 33 are used in combination as the variable mechanism has been described, the same operation and effect can be obtained even when only one of them is used, though the degree of freedom of positioning is reduced. Can be

Next, a second embodiment will be described with reference to FIGS. Note that the same reference numerals are given to items common to the first embodiment, and description thereof will be omitted. Operation unit 20
A plate-shaped bracket 3 protruding above the upper surface 20a along the side surface is provided at the center of the side surface on the side of the hand grip 13.
5 is attached. A mounting hole is provided near the finger rest 25 side of the bracket 35. A block 13 a having a screw hole having an axis substantially coincident with the central axis of the hand grip 13 is provided at the tip of the hand grip 13, and the bracket 35 and the block 1 are provided.
The operation unit 20 is fixed to the tip of the handgrip 13 with bolts 36 with a shim 37 interposed between the operation grip 20 and the handle 3.

Depending on the thickness and the number of shims 37, the operation unit 20
It is possible to adjust the relative position between the hand grip 13 and the operation unit 2 after rotating the operation unit 20 with respect to the hand grip 13 about the axis (attachment axis) of the bolt 36.
0 can be fixed, so that the operator can easily operate switches of the operation unit 20 with his thumb,
After positioning the operation section 20 by shim adjustment and angle adjustment, the operation section 20 is fixed by bolts 36. For this reason, the same operation and effect as in the first embodiment can be obtained with a simple configuration of bolting and shim adjustment. Further, the block 13a is protruded from the tip of the hand grip 13 by a predetermined length, serrations are provided on the protruding portions, and serrations are also provided on the mounting holes of the bracket 35, so that the operation portion 20 can be securely fixed around the mounting axis. Becomes

In this embodiment, the operation unit 20
8 is fixed to the handgrip 13, but as shown in FIGS. 8 and 9, the operation unit 20 is connected to the armrest 7.
It may be fixed to the side. That is, the operation unit 20
The bracket 42 attached to the bracket 42 and protruding downward is provided with concentric arc-shaped mounting long holes 42a and 42b centered around the finger rest 25. Then, with the shim 44 interposed between the mounting surface 41 on the armrest 7 side and the bracket 42, the operation unit 20 is fixed to the mounting surface 41 on the armrest 7 side with bolts 43, 43. With the concentric mounting slots 42a and 42b, the angle of the operation section 20 can be changed around the finger rest 25 and the shim can be adjusted, so that the same operation and effect can be obtained.

Next, a third embodiment will be described with reference to FIG. Note that the same reference numerals are given to items common to the first embodiment, and description thereof will be omitted. On the operator seat 6 side of the front end of the armrest bracket 17, there is a notch in the armrest 7.
And a bracket 47 on which the mounting portion 47a is erected. A slide rail 45 is mounted on the armrest bracket 17 behind the cutout along the longitudinal direction of the armrest 7. The inner guide 45a of the slide rail 45 is attached to the armrest bracket 17,
The outer guide 45b of the slide rail 45 is the bracket 4
7, the bracket 47 is attached to the armrest 7
Can be moved along the longitudinal direction of the camera. The operation unit 20
The mounting portion 47a is in a state where the bolt 48 is loosened.
Is rotatable around an axis of a mounting hole substantially parallel to the central axis of the handgrip 13 provided in the hand grip 13.

With the above configuration, the operation unit 20 can adjust the movement of the armrest in the longitudinal direction and adjust the angle around the mounting axis. For this reason, even if there is a difference in the length of the thumb or the natural posture of the thumb due to the individual difference of the operator, the operation unit 20 can be fixed at a position where each operator can easily operate by these variable mechanisms. As a result, as in the first embodiment, it is possible to prevent the thumb from being forcedly moved or moved, thereby improving operability.

In the embodiment described above, the operation unit 2
Although the example in which the 0 side is movable has been described, the same operation and effect can be obtained even if the hand grip 13 side is configured to be movable. For example, as shown in FIGS. 11 and 12, the operation unit 20 is fixed to the armrest 7. And the hand grip 13 side, the base of the hand grip 13 at the front end of the sidewall 11, the hand grip 13,
The steering lever 15 and the portion of the armrest 7 closer to the base of the handgrip 13 than the distal end position of the handgrip 13 are separate components from the armrest 7 as a grip unit 51. The grip unit 51 is provided with a mounting long hole 51a facing in the left and right direction of the vehicle body. It is repeated at equal intervals. Thus, the operator may arrange the grip unit 51 so as to be in a hand grip position that is easy to operate, and fix the grip unit 51 to the armrest bracket 17 with the bolts 52, 52. The mating surface between the armrest 7 and the grip unit 51 is
It may be flat. In addition, the movable direction (the longitudinal direction of the long hole 51a) has been described as the left-right direction of the vehicle body, but the present invention is not limited to this. 13 and FIG.
The grip unit 54 may be configured to be movable using the slide rails 55, 55 as shown in FIG.

In the embodiments described above, both the forward / reverse selection switch 22 and the speed stage changeover switch 24 have been described as examples of the seesaw switch, but they may be constituted by pushbutton switches. I do not care. For example, as shown in FIG. 15, the function of the forward / reverse selection switch 22 is changed to a forward switch 22a and a reverse switch 22b.
And the function of the speed stage changeover switch 24 is distributed to the speed increase switch 24a and the speed reduction switch 24b, and the forward switch 22a, the reverse direction switch 22b, the finger rest 25, the speed increase switch 24a, and the speed reduction switch 24b are viewed from above. The switch is arranged along a substantially arc shape opened to the hand grip 13 side, the height of the forward switch 22a is made higher than the height of the reverse switch 22b, and the deceleration switch 24
The height b may be higher than the height of the speed increasing switch 24a.

As shown in FIG. 16, the forward / reverse selection switch 22 may be replaced with a single push button switch 22c. That is, when the switch 22c is pressed during forward movement, the mode is switched to reverse.
Pressing switches to forward movement, so that when the operation of repeating forward and backward movements is performed, operation can be performed with only one switch operation, so that operability is improved. In this case, as shown in FIG.
Are displayed side by side to indicate whether pushing forward or backward when the switch 22c is pressed at the time of neutral (for example, turning on the lamp 26 at the time of neutral and moving forward by operating the switch 22c).

The finger rest 25 is not limited to the block shape shown in the embodiment, as long as the finger rest rests on the thumb and separates switches into functional groups. The upper surface 20a is located at the center of the upper surface 20a.
May be constituted by ribs or embosses extending in the lateral direction of the above.

[Brief description of the drawings]

FIG. 1 is a left side view of a bulldozer of an example of a work vehicle to which a steering device according to the present invention is applied.

FIG. 2 is a perspective view showing an example of the inside of the cabin of the bulldozer.

FIG. 3 is a perspective view of the steering device according to the first embodiment.

FIG. 4 is a front side view of the steering device according to the first embodiment.

FIG. 5 is a front side view showing another mode of the first embodiment.

FIG. 6 is a side view of a steering device according to a second embodiment.

FIG. 7 is a front side view of a steering device according to a second embodiment.

FIG. 8 is a side view showing another aspect of the second embodiment.

FIG. 9 is a front side view showing another aspect of the second embodiment.

FIG. 10 is a side view showing a steering device according to a third embodiment.

FIG. 11 is a plan view showing another embodiment of the present invention.

FIG. 12 is a view taken in the direction of arrows AA in FIG. 11;

FIG. 13 is a plan view showing another embodiment of the present invention.

14 is a view as viewed in the direction of arrows BB in FIG.

FIG. 15 is a perspective view showing another mode of the operation unit according to the present invention.

FIG. 16 is a perspective view showing another embodiment of the operation unit according to the present invention.

FIG. 17 is a perspective view of a control device according to the related art.

[Explanation of symbols]

6 ... operator seat, 7 ... armrest, 9 ... steering device, 11 ... side wall, 13 ... hand grip, 1
5 steering lever, 17 armrest bracket, 20
.. Operating unit, 21 forward / backward changeover switch, 22 forward / backward selection switch, 23 neutral switch, 24 speed speed changeover switch, 25 finger rest, 31, 4
5, 55: slide rail, 33: ball joint,
35, 42, 47: bracket, 37, 44: shim, 5
1,54 ... Grip unit.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G05G 1/26 G05G 1/26 (72) Inventor Koji Okazawa 3-1-1 Ueno, Hirakata City, Osaka Stock (72) Inventor Toshihiro Kawano 120 Oji-gun, Nono-cho, Ono-gun, Oita Chizuka 120, Oita Pref. F-term in Nick Kansei Corporation (reference) 2D003 AA02 BA01 EA05 2D015 EB01 3D040 AA02 AB08 AC02 AD06 AD15 3J070 AA07 AA24 BA22 BA41 CA23 CA47 CB04 CC71 CE04 DA21 EA32

Claims (3)

[Claims] A hand support provided on one of the left and right sides of an operator seat, and a plurality of operating means provided near the hand support and providing instructions to various control functions of the work vehicle. The operating device for a working vehicle, comprising: an operating unit equipped with at least one operating unit of the plurality of operating units; and a variable unit configured to change a relative position between the hand supporting unit and the operating unit. A steering device for a working vehicle, characterized by the following. 2. A hand support provided on one of the left and right sides of the operator seat, and a hand support disposed near the hand support for forward switching, forward switching and neutral switching control of the work vehicle. And a forward / reverse switching means for giving one of neutral, reverse and forward commands. The forward / backward switching means selects either forward or reverse of the work vehicle. And a neutral indicating means for instructing the work vehicle to move forward and backward. 3. A hand support provided on one of the left and right sides of the operator seat, and a plurality of operation means provided near the hand support and providing instructions to various control functions of the work vehicle. An operating unit provided with at least two of the plurality of operating units, and an operating unit provided on the operating unit and separating the operating units mounted on the operating unit into a plurality of groups. A steering device for a work vehicle, comprising: