JP2008154487A - Riding-type under-trellis work vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a riding-type under-trellis work vehicle capable of lightly carrying out correction in the moving direction of a self-propelled car body with less fatigue, while efficiently performing tending operation, or harvesting operation with both hands in under-trellis work. <P>SOLUTION: The riding type under-trellis work vehicle is equipped with freely steerable wheels 2 in the self-propelled car body 1 and is constituted so that the steering wheels 2 are operable for steering, with a maneuvering handle 4 arranged at the front of a driver's seat 5 and a maneuvering pedal 28 at the foot. The maneuvering pedal 28 is, preferably, equipped with a stepping operation type starting operation tool 29 for starting the self-propelled car body, by stepping in operation and stopping the self-propelled car body through the release of stepping in. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a riding-type under shelf work vehicle used for management work or harvesting work in an orchard or the like.

In a small agricultural tractor, there is known a structure in which a fall protection frame erected on the rear part of a driver's seat is lowered and lowered so that the work can be performed by entering the vehicle body under the shelf (for example, , See Patent Document 1).
JP-A-9-240402

  In recent years, agricultural tractors often use hydraulic continuously variable transmissions for shifting gears, and are configured to stop and start and stop continuously by pedal operation. Even while harvesting, etc., it is possible to move by repeatedly starting and stopping by pedal operation. However, in order to correct the moving direction, the operator must lower his hand each time to operate the steering handle.When the moving direction is repeatedly corrected, the boarding operator repeatedly determines the working posture and the steering posture. Thus, the posture is changed to make it easy to get tired, and the work efficiency is reduced because the operation is interrupted every time the correction operation in the moving direction is performed.

  If you take your hand off the steering wheel and start off, depending on the situation of the work place, the wheel may change its direction following the unevenness of the ground, and the so-called steering wheel may be removed and move in an unexpected direction. While it is desirable to hold the steering handle with at least one hand, the work must be neglected.

  The present invention has been made paying attention to such points, and in the work under the shelf, the management direction and the harvesting work can be efficiently performed using both hands, and the moving direction of the vehicle body can be corrected lightly with less fatigue. The main purpose is to provide a ride-type undercarriage vehicle that can be used.

  The first invention is characterized in that a steering pedal for steering the vehicle body is provided at the foot of a driver seat provided in the self-propelled vehicle body.

  According to the above configuration, in the management work and the harvesting work under the shelf of the fruit tree, the boarding operator can operate the control pedal to correct the moving direction while keeping the working posture with both hands raised, and repeatedly move. Even when the direction is corrected, it is not necessary for the boarding operator to switch the posture between the working posture and the steering posture.

  Therefore, according to the first invention, in the work under the shelf, it is possible to perform the correction of the moving direction of the vehicle body lightly with less fatigue while efficiently performing the management work and the harvesting work using both hands.

According to a second invention, in the first invention,
A self-propelled vehicle body is provided with steerable wheels, and the steerable wheels can be steered by a steering handle disposed in front of a driver's seat and the steering pedal at the foot.

  According to the above configuration, the moving direction can be corrected using only the steering handle during simple traveling, and the moving direction can be corrected using the control pedal in the work under the shelf. When traveling, the direction of the steering wheel can be strongly held by using both the steering handle and the steering pedal, and the vehicle can stably travel on the ground where the handle is easily removed.

According to a third invention, in the first or second invention,
The steering pedal is provided with a stepping-operation-type start operation tool for starting the self-propelled vehicle body by depressing operation and stopping the self-propelled vehicle body by releasing the depression.

  According to the above configuration, the self-propelled vehicle body can be started by depressing the start operation tool with the foot placed on the control pedal while correcting the direction by operating the control pedal, and depressing the start operation tool to run Can be stopped, and the movement in the desired direction and the stop at the desired position can be easily performed only by the operation of the foot.

According to a fourth invention, in the third invention,
The traveling speed at the time of starting with the start operating tool is set to a predetermined low speed lower than the maximum speed set by the speed change operating tool.

  According to the above configuration, the moving speed when starting the vehicle by operating the starting operation tool is low, and if you want to move a little to shift the work position, move the self-propelled vehicle body to the desired position without overrun Can be made.

  FIG. 1 shows a side view of a riding-type under-shelve work vehicle according to the present invention, and FIG. The riding-type under-shelves working vehicle is mainly used for under-shelves management work and fruit harvesting work in an orchard or the like, and a pair of left and right front wheels 2 as steering wheels and a pair of left and right motor-driven wheels. A steering wheel 4 for steering the front wheels and a driver seat 5 are erected before and after the self-propelled vehicle body 1 having the rear wheels 3.

  The self-propelled vehicle body 1 is configured by connecting a flat deck 7 having a substantially oval planar shape to an upper portion of a vehicle body frame 6 formed by assembling pipe materials and the like. A steering operation shaft 9 is rotatably supported on a steering frame 8 provided in the section, and the steering operation shaft 9 extends through the deck 7 upward. A steering shaft 10 having a steering handle 4 connected to the upper end thereof is concentrically connected to the upper end of the steering operating shaft 9, and the steering operating shaft 9 and the left and right front wheels 2 are interlocked and connected via a steering link mechanism 11. The front wheel 2 is steered in the direction of turning the handle by turning the handle 5 to the left and right.

  A rear wheel axle 15 equipped with an electric motor 12 for driving the rear wheel 3 and a speed reduction case 13 is swingable up and down around a fulcrum p at the rear part of the body frame 6 and elastically supported by a suspension spring 16. A pair of left and right batteries 14 are mounted at the front and rear intermediate positions of the frame 6.

  As shown in FIG. 6, grips 4a bent inward U-shape are provided on the left and right of the steering handle 4, and a panel box 20 is provided in the center of the handle. The panel box 20 is equipped with a power switch 21, a pair of left and right accelerator levers 22, a maximum speed setting dial 23 as a speed change operation tool, a forward / reverse switch 24, a charging state display lamp 25, a horn switch 27, and the like. Each is connected to a controller (not shown).

  The swinging operation angle of the accelerator lever 22 is detected by a potentiometer (not shown) built in the panel box 20, and the accelerator lever 22 is moved downward by the fingertip of the hand having either the left or right grip 4a. When pushed down and swung, an electromagnetic negative brake (not shown) provided in the rear wheel drive system is released, and the electric motor 12 is accelerated according to the accelerator operation amount. When the operation of the accelerator lever 22 is released, the accelerator lever 22 returns and swings upward, the power supply to the electric motor 12 is cut off, the negative brake is braked, and the self-propelled vehicle body 1 is stopped. . Here, the maximum speed setting dial 23 sets the speed when the accelerator lever 22 is pushed down to the maximum.

  A brake lever 26 wire-coupled to a mechanical brake (not shown) provided in the rear wheel drive system is mounted on the right grip 4a, and an emergency stop or A sudden stop can be made.

  A pair of left and right control pedals 28 are connected to the handle shaft 10 connected to the steering operation shaft 9, and the left and right control pedals 28 are stepped on to rotate the handle shaft 10 and the steering operation shaft 9 by foot operation. It can be moved. A pedal-like starting operation tool 29 is provided in front of the right control pedal 28. When the start operating tool 29 is stepped on with the toe of the right foot and the switch 30 is operated, the electric motor 12 is activated and self-propelled. The vehicle body 1 starts. At this time, the operating direction of the electric motor 12 is set according to the set state of the forward / reverse selector switch 24, and the operating speed of the electric motor 12 is set to a low speed about half of the maximum speed selected by the maximum speed setting dial 23. ing.

  A support column 32 is inserted into and supported by an outer cylinder 31 made of a square pipe that is erected and fixed at the rear part of the vehicle body frame 6, and the driver's seat 5 is supported at the upper end of the support column 32 so that the position of the driver's seat 5 can be adjusted back and forth. . The support 32 is slid upwardly by a compression coil spring 33 that is externally fitted, and a lock pin 34 provided on the outer cylinder 31 is selectively inserted into a lock hole 35 formed in parallel with the support 32 so that the driver seat 5 The height can be changed and adjusted arbitrarily. The lock pin 34 is integrally connected to an operation lever 36 that can be swung left and right around the fulcrum a, and is urged in a locking direction by a spring 37, and the operation lever 36 is operated outward against the spring 37. You can unlock it.

  A bucket 38 is provided at the front portion of the handle shaft 10, and can accommodate a management tool or temporarily store harvested fruits.

  A backrest 40 is provided behind the driver seat 5 so as to be reclining. The backrest 40 is attached to a backrest frame 41 formed by bending a pipe material, and the backrest frame 41 is arranged around the fulcrum b at the rear portion of a seat support frame 42 that is mounted on the upper end of the support column 32 so that the front and rear positions can be adjusted. The gas spring 43 is elastically held in its standing posture. The swing range of the backrest frame 41 is regulated by the front and rear stoppers 44.

  A headrest 45 is provided above the backrest 40. The headrest 45 is attached to a pipe support frame 46 pivotally connected to the upper part of the back frame 41 so as to swing back and forth around a fulcrum c, and the support frame 46 is attached to the back frame using a bolt 47 with a knob. As shown in FIG. 1, the headrest 45 can be fixed at the use position by being fastened and fixed to the rear 41, and the connection with the backrest frame 41 is released by loosening the bolt 47 with the knob. As shown in FIG. 5, the headrest 45 can be folded and stored behind the backrest 40. The headrest 45 that is folded and stored is fixed by a rubber band 48 provided on the backrest frame 41.

  Since the riding type under-shelve work vehicle according to the present invention is configured as described above, the self-propelled vehicle body 1 is moved in a desired direction by operating the control pedal 28 and the start operation tool 29 with feet, and the desired position. In the orchard work under the shelf, etc., both hands can be used for pollination, pruning, other management work, fruit harvesting work, etc. , And the stop can be repeated.

  In an orchard with high shelves, by setting the headrest 45 in an upright position, a seated boarding operator can easily perform work in a supine posture by placing the body and head on the backrest 40 and the headrest 45. be able to. In the lower shelf operation, the driver's seat 5 is lowered as much as possible and the headrest 45 is folded.

[Other Examples]
(1) The self-propelled vehicle body 1 can be configured to travel with a pair of left and right crawlers driven by a motor drive, and the propulsion performance can be enhanced at a work site with many slopes and irregularities. In this case, by rotating the steering handle 4 to the left and right, a speed difference is given to the left and right crawlers, and the steering handle 4 can be rotated by the steering pedal 28. It can also be configured and implemented.
(2) In a structure that travels with a pair of left and right crawlers, the left and right control pedals 28 can be independently operated, and the left and right crawlers are independently shifted according to the amount of depression, thereby controlling the vehicle body. It is also possible to do the direction.
(3) It is also possible to implement in a form in which the front wheel 2 is a driving wheel and the rear wheel 3 is a steering wheel.
(4) A shift lever can be used instead of the maximum speed setting dial 23 as a shift operation tool.

Overall side view Overall plan view Overall front view Overall rear view Side view of headrest folded Plan view around the steering handle

Explanation of symbols

1 Self-propelled vehicle body 2 Wheels (front wheels)
4 Steering handle 5 Driver's seat 23 Shifting control tool 28 Control pedal 29 Start control

Claims (4)

  A riding-type undercarriage work vehicle characterized in that a steering pedal for steering a vehicle body is provided at the foot of a driver seat provided in the self-propelled vehicle body.   2. The self-propelled vehicle body is provided with freely steerable wheels, and the steerable wheels are configured to be steerable by a steering handle disposed in front of a driver seat and the steering pedal at a foot. Passenger type work vehicle under shelf.   The riding type under shelf work vehicle according to claim 1 or 2, wherein the steering pedal includes a stepping-operation-type start operation tool that starts the self-propelled vehicle body by depressing operation and stops the self-propelled vehicle body by releasing the depression.   The riding type under-shelves work vehicle according to claim 3, wherein a traveling speed when starting by the start operating tool is set to a predetermined low speed lower than a maximum speed set by the speed change operating tool.

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