JP2000308409A - Steering wheel structure for harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steering wheel structure of a harvester capable of making an operator readily get on an off a traveling machine body even if the traveling machine body can be steered and operated by a steering sense close to that of an automobile. SOLUTION: A steering wheel 3 rotatable around a longitudinal shaft center P is installed at the front of a driver's seat 2 of a traveling machine body equipped with a pair of right and left crawler traveling apparatuses and a harvesting apparatus. The steering wheel 3 comprises, in a straight advancement state, a horizontal spoke 3A provided with a pair of right and left arm parts 3a and 3b integrally rotatable around the longitudinal shaft center P and hand grips 3B extended from both the right and left parts of the horizontal spoke 3A forward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a steering handle rotatable around a vertical axis in front of a driving seat of a traveling body having a pair of right and left crawler traveling devices and a harvesting device. The present invention relates to a steering handle structure of a harvester.

[0002]

2. Description of the Related Art Conventionally, as a steering handle structure of a harvester of this kind, a steering handle is attached to a tip end of a spoke radially attached to an upper end of a steering shaft, similarly to a handle of a general automobile. In some cases, an annular handgrip is integrally provided, and the annular handgrip is configured to be freely rotatable around a longitudinal axis of a steering shaft (for example, see Japanese Patent Application Laid-Open No. -490
No. 23). That is, in the conventional steering handle structure of the harvester, there is an advantage that the driver can turn the traveling body with the steering feeling (driving feeling) of the automobile.

[0003]

By the way, in the conventional steering handle structure of the harvester, in order to ensure good rotation operability of the hand grip in a posture seated on the driver's seat, the hand grip includes: A semicircular portion located rearward of the longitudinal axis is disposed above the thigh of the driver sitting on the driver's seat.
Therefore, when the driver sits on the driver's seat and stands up from the driver's seat, he or she is naturally placed between the driver's seat and the handgrip because the rear half-arc portion of the handgrip is in the way. Since it is not possible to stand in a posture, when performing a sitting operation and a standing operation with respect to the driver's seat, the driver must stand diagonally forward or sideways of the driver's seat, and as a result, twists the body in the lateral direction However, there is a problem that labor is required to get on and off the traveling body.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and a main problem thereof is to enable a steering operation of a traveling body with a steering feeling close to that of an automobile. It is another object of the present invention to provide a steering handle structure of a harvester that can easily get on and off a traveling body.

[0005]

According to a first aspect of the present invention, a steering handle structure for a harvester includes a pair of right and left crawler traveling devices and a harvesting device. A steering handle structure of a harvester provided with a steering handle, wherein the steering handle includes a pair of left and right arms that are integrally rotatable around a vertical axis when the traveling body is in a straight traveling state. The present invention comprises a horizontal handle rod provided and a hand grip extending forward from both left and right ends of the horizontal handle rod.

(Function) According to the above-mentioned characteristic configuration, the handgrip extending forward from both left and right ends of the lateral handle rod is gripped, and the lateral handle rod is rotated around the longitudinal axis. Thus, when the user grips the handgrip, it is possible to obtain a feeling similar to that of gripping a general automobile handle. Moreover, when the driver gets on and off the driver's seat, the turning posture of the steering handle is set in the straight running state of the traveling body, so that in this state, there is no grip on the driver's seat side with respect to the side handle rod, Since the distance between the driver's seat and the steering wheel can be increased by that much, the driver can easily stand in a natural posture between the driver's seat and the steering wheel immediately before the driver's seat. As a result, the seating operation and the standing operation on the driver's seat can be smoothly performed. (Effect) Therefore, the traveling body can be turned with a steering feeling close to the steering feeling of an automobile, and the getting on and off of the traveling body can be performed easily.

A feature of the steering handle structure of the harvester according to claim 2 of the present invention is that the handgrip is formed in an arc along or substantially along an imaginary circle centered on the longitudinal axis. is there.

(Function) According to the above-mentioned characteristic configuration, by forming the hand grip in an arc shape or an arc shape substantially along the arc, the feeling when the hand grip is gripped is the same as that when gripping the handle of a general automobile. It can bring you closer to your senses. (Effects) Therefore, the turning operation of the traveling body can be performed with a steering sensation closer to the steering sensation of the automobile.

According to a third aspect of the present invention, the steering handle structure of the harvester is characterized in that the hand grip includes a left grip portion extending forward from a left end of the horizontal handle rod, and the horizontal grip portion. And a right grip portion extending forward from the right end of the handlebar, and a space is formed between the left and right grip portions to secure a view of the traveling body forward. It is in.

(Function) According to the above-mentioned characteristic configuration, the presence of the space formed between the left and right grip portions widens the field of view of the traveling body with respect to the front. (Effect) Therefore, the visibility to the front of the traveling body is good.

A feature of the present invention according to claim 4 is that the steering handle is also configured to be used as a mounting portion of the electrical equipment.

(Operation) According to the above-mentioned characteristic configuration, by mounting the electric equipment on the steering handle, such electric equipment can be concentrated on the steering handle, and the line of sight to the front of the traveling body is merely directed downward. Thus, the electrical equipment can be visually observed. (Effects) Therefore, for example, when the electrical device is an operating device such as a switch, the operability of the device can be improved, and when the electrical device is a display device, the visibility is improved. can do.

According to a fifth feature of the present invention, the harvesting device is provided so as to be able to be driven up and down with respect to the traveling body via an actuator for lifting and lowering, and the handgrip of the steering handle is provided. Another feature is that a harvesting device elevating switch, which is one of the electrical devices, is mounted for operating the actuator up and down to adjust the height of the harvesting device with respect to the ground.

(Operation) According to the above-mentioned characteristic configuration, the harvesting device elevating switch is provided on the steering handle, which is at hand of the driver, during the harvesting operation while traveling on the traveling machine body. The operation can be easily performed. (Effect) Therefore, the operability of the switching operation of the harvesting device elevating switch can be improved.

According to a sixth aspect of the present invention, in the horizontal handle bar, the front side of the continuous portion of the left and right arms is located within an area surrounded by the horizontal handle bar and the hand grip. The electrical equipment is formed so as to protrude in a protruding state, and on the upper surface of the protruding portion, an alarm means for generating alarm information for alerting to the surroundings accompanying the traveling of the traveling body toward the surroundings. The point is that one alarm switch is attached.

(Operation) According to the above-mentioned characteristic configuration, since the alarm switch is mounted on the upper surface of the bulging portion, the alarm switch is mounted compared to the case where the alarm switch is mounted on the lateral handlebar having no such bulging portion. It is easy to secure a large operation area, and the alarm switch can be easily operated by providing the alarm switch on the steering wheel which is at hand of the driver during traveling of the traveling body.
Moreover, the bulging portion does not protrude toward the driver's seat. (Effect) Therefore, the operability for the emergency operation of the alarm switch can be improved. Moreover, the bulging portion does not hinder the sitting operation and the standing operation with respect to the driver's seat.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] FIG. 1 shows a combine as an example of a harvester having a steering handle structure of the present invention, and a pair of right and left crawler traveling devices AL and AR and a harvester B. A control tower 1 and a driver seat 2 are mounted on the front and rear of a driving unit D provided at the right front of the traveling aircraft C having A rotatable steering handle 3 is provided.
The harvesting device B is composed of a harvesting and harvesting device that harvests planted grain culms and transports the harvested culm backward.
Is mounted on the front part of the traveling machine body C via a hydraulic cylinder 4 as an actuator for raising and lowering so as to be capable of driving up and down. By operating the hydraulic cylinder 4 up and down, the ground height of the reaper B can be adjusted. Further, the traveling machine C is provided with a threshing device E for receiving the harvested grain culm from the harvesting and harvesting device B and threshing and a storage tank F for storing threshed grains. A cutting device G for cutting and processing thresh-processed grain stems discharged from the threshing device E is connected and provided across the rear portion of the storage tank F and the storage tank F.

The combine can be adapted to travel on a general public road, and as shown in FIG.
Is provided on the left lateral outer surface and the left upper surface of the cutting device G when the steering body 3 is rotated to turn the traveling machine C to the left. A turn indicator 5L is provided, and the traveling body C is turned right by the turning operation of the steering handle 3 between the right lateral outer surface of the control tower 1 and the upper right surface of the cutting device G. At this time, a right turn indicator 5R is provided as right turn instruction means for notifying the surroundings of the right turn of the traveling body C. Further, a working light 5A for illuminating the front of the reaping and harvesting device B is provided on the right lateral outer surface side of the reaping and harvesting device 2, and a caution accompanying the traveling of the traveling vehicle C is provided on the control tower 1. A horn 5B is provided as alarm means for generating an alarm sound toward the surroundings as alarm information for alerting.

As shown in FIG. 6, the steering handle 3
Is attached to the upper end of a rotating shaft 1A supported by the control tower 1 in a vertical position in which the upper end side is slightly inclined backward, and is rotatably fixed around the longitudinal axis P together with the rotating shaft 1A. .
That is, in front of the driver's seat 2 of the traveling machine body C, the steering handle 3 rotatable around the longitudinal axis P is provided.

As shown in FIG. 3, the steering handle 3
Is a horizontal handle rod provided with a pair of left and right arms 3a, 3b that are rotatable integrally about a longitudinal axis P of the rotating shaft 1A in a straight traveling state of the traveling body C (forward and straight traveling states). 3A, and a hand grip 3 extending from both left and right ends of the lateral handle bar 3A toward the front of the traveling body C.
B. In other words, the steering handle 3 includes a lateral handle rod 3A and hand grips 3B extending from both ends of the lateral handle rod 3A. The traveling body C is fixed to the upper end of the rotating shaft 1A.
When the vehicle is going straight, the hand grip 3B is
, And the horizontal handle rod 3
Among the parts A, a part located on the left side with respect to the longitudinal axis P of the rotating shaft 1A is configured in the left arm portion 3a, and a part located on the right side with respect to the longitudinal axis P of the rotating shaft 1A. Are provided on the right arm 3b.

Further, the hand grip 3B is formed in an arc shape along (or substantially along) an imaginary circle R centered on the longitudinal axis P of the rotating shaft 1A, and the hand grip 3B is connected to the horizontal handle rod 3A. Is divided into a left grip portion 3c extending forward from the left end portion thereof and a right grip portion 3d extending forward from the right end portion of the lateral handle bar 3A. , 3d, there is formed a space S for securing a field of view to the front of the traveling body C.

Further, of the lateral handle rod 3A,
The front side of the continuous portion of the left and right arms 3a, 3b is formed so as to protrude into a region surrounded by the lateral handle bar 3A and the hand grip 3B. In other words, of the horizontal handle rod 3A, the horizontal handle rod 3A and the left and right grip portions 3c,
3d, the bulging portion 3e protrudes into the region surrounded by
Are integrally formed. The rear side of the lateral handle rod 3A is linearly continuous in the left-right direction.

By adopting the steering handle 3 configured as described above, when the left and right grip portions 3c and 3d are respectively gripped and the horizontal handle rod 3A is rotated around the vertical axis P, a general operation is possible. Sensation that is close to the feeling of a rotating operation while holding the steering wheel of a typical automobile can be obtained.
In addition, by setting the turning posture of the steering wheel 3 to the straight running state of the traveling machine body C when the driver gets on and off the driver's seat 2, the driver can be positioned immediately in front of the driver's seat 2. It is possible to cause a space T between the steering wheel 2 and the steering handle 3 to easily stand in a natural posture, and as a result, the seating operation and the standing operation with respect to the driver's seat 2 can be performed smoothly. Therefore, the traveling body C can be turned around with a steering feeling close to the steering feeling of an automobile, and the traveling body C can easily get on and off the driving unit D.

As shown in FIG. 3, the steering handle 3
Are electromagnetic valves 4A, horns 5B, and left and right turn indicators 5L, 5
R, and also serves as a mounting portion for mounting a switch as an electrical device corresponding to each of the work lights 5A.

More specifically, one of the electric devices for adjusting the height of the reaping and harvesting device 2 by moving the hydraulic cylinder 4 up and down on the right grip portion 3d of the handgrip 3B of the steering handle 3. The harvesting device elevating switch 6A is attached. That is, the right grip 3d
As shown in FIG. 3 and FIG. 8, a harvester lift switch 6A electrically connected via a control unit H to an electromagnetic valve 4A for controlling the operation and stop of the hydraulic cylinder 4 is attached to the harvester. By the switching operation of the lifting switch 6A, the electromagnetic valve 4A is selectively switched to a state in which the hydraulic cylinder 4 is extended, a state in which the hydraulic cylinder 4 is contracted, and a state in which the expansion and contraction of the hydraulic cylinder 4 is stopped. .

An alarm switch, which is one of the electric devices for operating the horn 5B to generate an alarm sound, on the upper surface of the bulging portion 3e of the lateral handle rod of the steering handle 3. 6B is attached. That is, as shown in FIGS. 3 and 8, an alarm switch 6B electrically connected to the horn 5B via the control unit H is attached to the upper surface of the bulging portion 3e.
A warning sound can be generated from the horn 5B by the pressing operation of. Note that a horn sound is set as the alarm sound.

Further, a left turn instruction switch 6C, which is one of the electric devices for blinking (operating) the left turn blinker 5L, is attached to the left arm portion 3a of the lateral handle rod 3A. A right turn instruction switch 6D, which is one of the electric devices for blinking (operating) the right turn signal 5R, is attached to the right arm portion 3b of the lateral handle rod 3A. I have. That is, as shown in FIG. 3 and FIG. 8, the left and right arm portions 3a and 3b are provided with a left turn instruction electrically connected to the left turn signal 5L and the right turn signal 5R via the control section H. A switch 6C and a right turn instruction switch 6D are separately mounted.
By selectively pressing C or the right turn instruction switch 6D, the corresponding turn signal can be blinked. Although not shown, each of the left-turn instruction switch 6C and the right-turn instruction switch 6D is provided with a blinking light for blinking a pressing surface in accordance with a pressing operation thereof.

Further, a work light switch 6E, which is one of the electric devices for turning on the work light 5A, is attached to the left grip portion 3c of the hand grip 3B of the steering handle 3. That is, the left grip 3
As shown in FIGS. 3 and 8, a work light switch 6E electrically connected to the work light 5A via the control unit H is attached to the work light switch c. 5A is selectively switched between a lighted state and a light-off state.

The harvester lifting switch 6A and the work light switch 6E are mounted on the left and right grips 3c and 3d at positions where they can be switched with fingers as they are while holding them. Although not shown, the steering handle 3 is configured to be vertically splittable, and the rotary shaft 1A is formed of a cylindrical body, and each of the switches 6A, 6B, 6C, 6D, 6E is An electric cord electrically connecting to the control unit H is routed from the inside of the steering handle 3 to the inside of the rotary shaft 1A, and is led out from the lower end of the rotary shaft 1A to the control unit H.

Next, a structure for turning the traveling body C by turning the steering handle 3 will be described.

As shown in FIG. 5, the transmission system from the engine 7 of the traveling body C to the left and right crawler traveling units AL and AR includes a belt-type continuously variable transmission 8, a forward / reverse switching mechanism 9, The transmission 10 is interposed in a state of being connected in series in the order described.

The forward / reverse switching mechanism 9 transmits the output of the continuously variable transmission 8 to the auxiliary transmission 10 as forward power by operating only the forward clutch 9F using a hydraulic clutch against the bias. Similarly, the output of the continuously variable transmission 8 is transmitted to the auxiliary transmission 10 as the reverse power by making only the reverse clutch 9R using the hydraulic clutch be engaged against the urging, and the forward clutch 9F and the reverse clutch 9R are transmitted. By turning off both, a neutral state in which power is not transmitted appears. That is, the forward / reverse switching mechanism 9 also serves as a traveling clutch, and the forward clutch 9F is engaged by operating the shift lever 11 of the continuously variable transmission 8 into the forward movement range, and the neutral position of the shift lever 11 is maintained. The reverse clutch 9 </ b> R is engaged by operating the shift lever 11 in the reverse range, and the reverse lever 9 </ b> R is operated.
The cutting operation is performed by the operation to the neutral position.

The auxiliary transmission 10 is of a gear type in which the power transmitted via the forward / reverse switching mechanism 9 is switched between three levels and transmitted to the final transmission shaft 12.

The left and right crawler traveling devices AL, A
The left and right planetary gears that respectively link the axles 13L and 13R of the left and right crawler traveling devices AL and AR with the final transmission shaft 12 by turning the self-propelled body 2 by giving a difference to the traveling speed of R. Devices 14L and 14R, and a continuously variable transmission 15 as a turning actuator capable of switching between forward and reverse to operate these planetary gear devices 14L and 14R in relation to each other. An interlocking means for operating the continuously variable transmission 15 based on a rotation operation is provided.

Each of the planetary gear units 14L and 14R is attached to the final transmission shaft 12 so as to rotate integrally with the internal gears 17L and 17R, and is attached to each of the axles 13L and 13R while rotating integrally therewith. Planet gears 18L, 1 meshing with internal gears 17L, 17R
Planetary frames 19L, 19R supporting 8R, and axles 13L,
13R is rotatably attached to each of the planetary gears 18L and 18R and meshes with the planetary gears 18L and 18R.
L, 20R. The internal gear 17
L, 17R, planetary frames 19L, 19R, sun gear 20L,
Reference numeral 20R denotes a rotating element constituting the planetary gear units 14L and 14R, of which the sun gears 20L and 20R are rotating elements L and R not used for input and output. Then, by increasing the number of rotations in the same direction as the final transmission shaft 12 from the stopped state of the sun gears 20L, 20R, the axles 13L, 13R
The rotation speed of the axles 13L and 13R is reduced to zero and reduced to zero by increasing the rotation speed of the sun gears 20L and 20R from the stopped state and increasing the rotation speed in the direction opposite to the final transmission shaft 12. Later, the rotational speed in the reverse direction is increased.

The turning continuously variable transmission 15 is composed of an axial plunger type variable displacement type hydraulic pump driven by the engine 7 and an axial plunger type hydraulic motor respectively driven by pressure oil therefrom. This is a hydrostatic continuously variable transmission, which is interlocked with the sun gears 20L and 20R so as to rotate the sun gears 20L and 20R at equal speeds in opposite directions by operating the sun gears 20L and 20R. , 20R in the stopped state and the forward rotation speed-up operation, the forward rotation state increases the number of revolutions of the left sun gear 20L in the same direction as the final transmission shaft 12 and the right sun gear 20R While increasing the rotation speed in the direction opposite to the transmission shaft 12, the rotation speed of the left sun gear 20 </ b> L in the reverse direction with respect to the final transmission shaft 12 in the reverse state is increased. Right sun gears with increasing 2
The number of rotations in the same direction as the final transmission shaft 12 of 0R is increased,
By performing the reverse rotation acceleration operation, in the forward state, the rotation speed of the left sun gear 20L in the direction opposite to the final transmission shaft 12 is increased, and the rotation of the right sun gear 20R is rotated in the same direction as the final transmission shaft 12. On the other hand, in the reverse state, the number of rotations of the left sun gear 20L in the same direction as the final transmission shaft 12 is increased, and the number of rotations of the right sun gear 20R in the direction opposite to the final transmission shaft 12 is increased. It is to let.

The interlocking means interlocks with the sun gear 20L or 20L corresponding to one of the crawler traveling devices AL and AR on the turning operation direction side in conjunction with the turning operation of the steering handle 3.
This is a means for operating the continuously variable transmission 15 for turning so that R rotates in the axle rotation speed decreasing direction. Specifically, as shown in FIGS. 6 and 7, the lever 23 for rotating the transmission trunnion shaft 22 of the continuously variable transmission 15 for turning is pulled in one direction so that the transmission trunnion shaft 22 is moved. A first position in which the transmission trunnion shaft 22 is rotated from the neutral position to the reverse rotation and acceleration side by being pushed and rotated from the neutral position to the forward rotation increasing side, and the transmission trunnion shaft is rotated by being pulled in one direction. The rotation of the transmission trunnion shaft 22 from the neutral position to the forward rotation increasing side by rotating the rotation of the transmission trunnion shaft 22 from the neutral position to the forward rotation increasing side by switching the rotation of the transmission trunnion shaft 22 from the neutral position to the forward rotation increasing side. An operation lever 25 that is switchable between a first operation posture in which the lever 23 is brought into the first posture by swinging around the axis P and a second operation posture in which the lever 23 is brought into the second posture; A switching wire W for switching the operation lever 25 to the second operation position in accordance with the operation of the shift lever 11 to the forward movement region and switching the operation lever 25 to the first posture in accordance with the operation of the shift lever 11 to the reverse movement region; An arm 41 is provided, which is pivotally operated via an interlocking mechanism 40 in accordance with the turning operation of the steering handle 3 to the left and right, to the "left" of the steering handle 3 when the lever 23 is in the second posture. The lever 23 is pulled by the swing of the arm 41 associated with the turning operation of the arm, and the lever 23 is pushed by the swing of the arm 41 caused by the swing operation of the steering handle 3 to the “right”. Is in the first posture, the lever 23 is pulled by the swing of the arm 41 accompanying the turning operation of the steering handle 3 to the left, and the turning operation of the steering handle 3 to the right. To And it is configured to provide a push-pull wire 24 which pressed the lever 23 by the swing Urn arm 41. The operation lever 25 acts on the push-pull wire 24 to switch the lever 23.

The continuously variable transmission 8 for traveling and the continuously variable transmission 15 for turning are mounted on a transmission case 26 having axles 13L and 13R, and are provided with a forward / reverse switching mechanism 9 and a planetary gear unit. 14L and 14R are housed in the transmission case 26. Also, 27
This is a mowing unit drive shaft that is linked to the output shaft of the continuously variable transmission 8 for traveling via a gear pair 28 and a clutch 29.

According to the above configuration, if the steering handle 3 is operated to the "straight forward" position in both forward and backward travel, the continuously variable transmission 15 for turning is in the neutral state and the left and right Since the sun gears 20L, 20R in the planetary gear units 14L, 14R are in a stopped state, the left and right axles 1
3L and 13R are planetary gear units 14
The left and right crawler traveling devices AL and AR are driven at the same speed in the same direction by being driven at the same speed in the same direction via L and 14R, and a straight traveling state appears.

When the steering handle 3 is turned to the left in the forward straight traveling state, the shift lever 11 is moved to the forward movement area, and the lever 23 is in the second position. Is rotated in the reverse direction to the final transmission shaft 12 of the left sun gear 20L, and the forward speed of the left axle 13L, ie, the left crawler traveling device AL, decreases. On the other hand, the rotation speed of the right sun gear 20R in the same direction as the final transmission shaft 12 increases, and the right axle 13R, that is, the right crawler traveling device A
By increasing the forward speed of R, a gentle turning with the left turning inside is performed. If the steering handle 3 is turned to the left, the forward movement of the left crawler traveling device AL is stopped. When the ground turning is performed and the steering handle 3 is further turned to the left, the left crawler traveling device AL moves backward to perform the super turning.

When the steering handle 3 is turned to the right in the forward straight traveling state, the shift lever 11 is moved to the forward movement area, and the lever 23 is in the second position. Is operated in the forward rotation increasing speed, the rotation speed of the right sun gear 20R in the direction opposite to the final transmission shaft 12 is increased, and the forward speed of the right axle 13R, that is, the right crawler traveling device AR is increased. On the other hand, the number of rotations of the left sun gear 20L in the same direction as the final transmission shaft 12 increases, and the left axle 13L, that is, the left crawler traveling device A
As the forward speed of L increases, a gentle turning with the right turning inside is performed. If the steering handle 3 is turned to the right, the forward movement of the right crawler traveling device AR is stopped. When the ground turn is performed and the steering handle 3 is further turned to the right, the right crawler traveling device AR moves backward, thereby performing the super turn.

On the other hand, when the steering handle 3 is turned to the left in the straight-ahead reverse state, the shift lever 11 is moved to the reverse region by operating the shift lever 11 so that the lever 23 is in the first position, and the transmission trunnion shaft 22 Is operated in the forward rotation speed-up operation, the rotation speed of the left sun gear 20L in the direction opposite to the final transmission shaft 12 increases, and the left axle 13L, that is, the reverse speed of the left crawler traveling device AL increases. On the other hand, the number of rotations of the right sun gear 20R in the same direction as the final transmission shaft 12 increases, and the right axle 13R, that is, the right crawler traveling device A
As the reversing speed of R increases, a gentle turning with the left turning inside is performed, and if the steering handle 3 is further turned to the left, the forward movement of the left crawler traveling device AL is stopped, so that the signal is stopped. When the ground turn is performed, and the steering handle 3 is further turned to the left, the left crawler traveling device AL moves forward to perform the ground turn.

When the steering handle 3 is turned to the right in the reverse straight traveling state, when the shift lever 11 is operated in the reverse direction, the lever 23 is in the first position, and the transmission trunnion shaft 22 is moved. Is operated in the reverse rotation speed-up operation, the rotation speed of the right sun gear 20R in the direction opposite to the final transmission shaft 12 increases, and the right axle 13R, that is, the reverse speed of the right crawler traveling device AR decreases. On the other hand, the rotation speed of the left sun gear 20L in the same direction as the final transmission shaft 12 increases, and the left axle 13L, that is, the left crawler traveling device A
As the reversing speed of L increases, a gentle turning with the right turning inside is performed, and when the steering handle 3 is turned to the “right”, the forward movement of the right traveling device AR is stopped, so that When the turning is performed and the steering handle 3 is further turned to the right, the right crawler traveling device AR moves forward to perform the pivot turn.

The steering handle 3 is turned to the right or left within a predetermined turning angle range in which the straight running state can be set to the neutral position and the turning operation can be performed without holding the hands holding the left and right grip portions 3c and 3d. It is configured to be movable. In other words, the steering handle 3 is configured to be able to swing right and left around the vertical axis P to a predetermined rotation angle with the straight traveling state as a neutral position. For example, in the present embodiment, the rotation angle range is set to about 70
The degree is set to about 70 degrees to the left from the straight traveling state. In addition,
The present invention is not limited to this rotation angle range. Although not shown, the steering handle 3 is configured to automatically return to a neutral position as a straight traveling state when the turning operation of the steering handle 3 is released.

[Second Embodiment] FIG. 9 shows the left and right grips 3c, 3c of the steering handle 3 described in the first embodiment.
3d shows another embodiment of the present invention, in which a tip portion 33 of the right grip portion 3d to which the harvester lifting switch 6A is attached.
A is configured to be attachable to and detachable from the base 33B thereof, and the work light switch 6E of the left grip portion 3c.
Is attached to and detachable from the base 34B thereof, and the tip 33A to which the harvester elevating switch 6A is attached can be attached to the base 34B of the left grip 3c, and The end portion 34A to which the work light switch 6E is attached can be attached to the base portion 33B of the right grip portion 3d. That is, according to the convenience of the driver, the harvesting device elevating switch 6A
The mounting position of the switch and the work light switch 6E can be changed on the left and right. The tip 33A to which the harvester lifting switch 6A is attached and the tip 34A to which the work light switch 6E is attached are both formed linearly.

The other structure is the same as that of the first embodiment. Components having the same structure or the same function as those described in the first embodiment are denoted by the same reference numerals and description thereof is omitted. .

[Other Embodiments] The harvester is not limited to the combine described in the above-mentioned embodiment, but may be any harvester that can apply the steering handle structure of the present invention. , A green onion harvester or a radish harvester. The electrical equipment attached to the steering handle 3 is not limited to switches, but includes various electronic equipment such as a digitally displayed speedometer and a display panel for displaying the storage status of the storage tank F. It may be. The hand grip 3B may be extended in a semicircular shape over both left and right ends of the lateral handle rod 3A. With the steering handle 3 in a straight-ahead state, a horizontal handle is provided within a range in which a gap between the driver's seat 2 and the steering handle 3 in which a driver can easily stand up in a natural posture can appear. The rear side of the rod 3 </ b> A may be continuous in a shape of a letter spreading toward the driver seat 2.

[Brief description of the drawings]

FIG. 1 is a right side view of the whole combine.

FIG. 2 is an overall plan view of the combine.

FIG. 3 is a plan view of an operation unit.

FIG. 4 is a plan view showing a linkage mechanism between a rotation shaft of a steering handle and a push-pull wire.

FIG. 5 is a schematic diagram showing a transmission system.

FIG. 6 is a cutaway front view showing movement of a lever.

FIG. 7 is a side view showing the movement of a lever.

FIG. 8 is a block diagram showing a connection state of each switch.

FIGS. 9A and 9B are plan views showing a second embodiment of a steering handle.

[Explanation of symbols]

 AL Crawler traveling device AR Crawler traveling device B Harvesting device (Crop harvesting device) C Traveling body P Vertical axis R Virtual circle S Space 2 Driver seat 3 Steering handle 3A Side handle rod 3a Left arm 3b Right arm 3B Hand grip 3c Left grip part 3d Right grip part 3e Swelling part 4 Actuator (hydraulic cylinder) 5B Alarm means (horn) 6A Electrical equipment (harvesting device elevating switch) 6B Electrical equipment (alarm switch)

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Ama Okuyama 64 Ishizukita-cho, Sakai-shi, Osaka F-term in Kubota Sakai Works Co., Ltd. (Reference) 2B076 AA03 BA07 DA03 DC03 3D030 DA11 DB13 3D052 AA06 AA17 BB08 BB11 DD03 EE01 FF01 GG03 HH01 JJ00 JJ10 JJ21 JJ31

Claims (6)

[Claims] 1. A steering handle of a harvester in which a steering handle rotatable around a vertical axis is provided in front of a driving seat of a traveling body including a pair of right and left crawler traveling devices and a harvesting device. A horizontal handle rod having a pair of left and right arms that are rotatable integrally around a vertical axis when the traveling body is in a straight traveling state, and a left and right side of the horizontal handle rod. A steering handle structure for a harvester, comprising a hand grip extending forward from both ends. 2. A steering handle structure for a harvester according to claim 1, wherein said handgrip is formed in an arc shape along or substantially along an imaginary circle centered on said longitudinal axis. 3. A left grip portion extending forward from a left end of the horizontal handle bar, and a right grip portion extending forward from a right end portion of the horizontal handle bar. The steering handle structure for a harvester according to claim 1 or 2, wherein a space is formed between the left and right grip portions so as to secure a view of the traveling body in front. 4. The steering handle structure for a harvester according to claim 1, wherein the steering handle is also configured to be used as a mounting portion for an electrical device. 5. The harvesting device is disposed so as to be able to be driven up and down with respect to the traveling machine body via an actuator for lifting and lowering, and the actuator is moved up and down by a hand grip of the steering handle. The steering handle structure for a harvester according to claim 4, further comprising a harvester lift switch, which is one of the electric devices for adjusting the height of the harvester to the ground. 6. The lateral handle bar is formed such that a front side of a continuous portion of left and right arm portions protrudes into a region surrounded by the lateral handle bar and the hand grip. At the same time, on the upper surface of the bulging portion, an alarm switch, which is one of the electric devices for operating an alarm unit for generating alarm information for alerting the traveling of the traveling body toward the surroundings, is attached. The steering handle structure for a harvester according to claim 4 or claim 5.