JPH09187112A - Working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable to continuously carry out a work such as harvesting by both hands by enabling to move forward and stop a working vehicle by an inclination movement of a seat. SOLUTION: In this working vehicle, wheels 3, 4 are installed in front and in the rear of the frame 2 of a working vehicle and a seat 8 is installed in an almost middle part of the frame 2 to be able to incline forward and backward. A usual electric drill is removably mounted on the frame 2 as a motor M and its ratchet L is connected to the wheels 3, 3 through a speed change device 12. A first arm 18 and a second arm 22 are installed between the motor M and the seat 8 to be inclinable around supporting shafts 16 and 18 to be centers. A switch S of the motor M is brought to put on when the seat 8 inclines forward and the switch S is brought to put off when the seat inclines backward.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-propelled work vehicle used for various operations such as cultivation, management and harvesting of vegetables and flowers.

[0002]

2. Description of the Related Art Harvesting of vegetables and flowers is largely done by hand except for a part. For example, when harvesting strawberries, the worker picks the fruits with both hands while moving forward along the ridges in a forward bending posture. In addition, recently, the age of agricultural workers has remarkably increased, and it is required to reduce labor in harvesting strawberries, which requires less labor than other agricultural products. In order to reduce this effort as much as possible, there are also cases where fruits are placed or an auxiliary table or work vehicle on which a worker sits is used.

[0003]

However, even if a table or work vehicle is used, it is still hard work to bend and work for a long time. In particular, it is a heavy burden for the elderly to move the platform and work vehicle along the ridges while harvesting. In order to further reduce this burden, various self-propelled work vehicles equipped with power have already been proposed, but all of the work vehicles are large and heavy, and few are suitable for a narrow ridge. Further, since the work vehicle is generally designed to operate the switch with fingers and feet, it is necessary to interrupt the work and operate the switch each time it moves. Further, although recent work vehicles are multifunctional, their internal mechanisms are complicated, so that they are not easy to operate and difficult to maintain.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a small working vehicle which is self-propelled and can be easily maintained while the work can be continued with both hands while the forward and stop operations are surely performed. I am trying.

[0005]

To achieve this object, a work vehicle according to the present invention comprises a motor for driving wheels,
It is characterized by comprising a seat tiltably provided in the vicinity of the wheels, and a link portion for actuating or stopping the motor by tilting the seat.

Further, the work vehicle according to the present invention includes a frame having front and rear wheels and a seat supporting the seat so as to be tiltable in the front-rear direction, and a frame detachably attached to the frame and via a transmission. A motor connected to the wheel, and a link portion arranged between the motor and the seat, which activates the motor when the seat leans forward and stops the motor when the seat leans backward. It has a feature. In particular, the frame is expandable and retractable,
It is desirable to use a general purpose electric drill for the motor.
In this work vehicle, for example, when an elderly person sits in a seat and moves the center of gravity (center of gravity) to the front, the motor of the motor is activated by the action of the link portion, and the spindle of the motor is greatly decelerated by the reducer to slowly move the wheels. And rotate. Further, when it is desired to stop the work vehicle at a predetermined position, the motor is stopped by the action of the link portion simply by moving the center of gravity backward.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described with reference to FIGS. This work vehicle 1 is used for each work of cultivating, managing and harvesting strawberries, and has a frame 2 which is a telescoping frame with a pipe inside. The frame 2 has small wheels 3 and 3 supported by an axle 3a at a front end, and wheels 4 and 3 supported by an axle 4a at a rear end.
4 is provided. The axial width of the axles 3a, 4a shall not exceed the lateral width of the seat described below.

The seat 8 is attached so as to be tilted slightly in the front-rear direction about a support shaft 6 provided upright on the rear upper surface of the frame 2. The support shaft 6 of the seat 8 is provided on the vertical line of the center of gravity when an operator normally sits on the seat 8. In addition, in FIG. 1 and FIG.
It is a shock absorber. Further, a support member 10 having an F-shaped side face is fixed to the rear of the rear portion of the frame 2, and a transmission 12 and a T-shaped joint 13 connected to the axle 4a between the vertical plates 10a and 10b.
Is installed.

Further, a link portion 14 for interlocking the tilt of the seat 8 with the switch S of the motor M is arranged between the support member 10 and the seat 8. The link portion 14 rotates around a first arm 18 that rotates about a support shaft 16 that is erected substantially in the center of the support material 10, and a support shaft 20 that is erected on the rear portion of the support material 10. It is composed of a moving second arm 22. The first arm 18 has a flat plate shape,
The front end 18a is pivotally attached to the rear part 8a of the seat 8, and the rear end 18b is connected to the front upper end 22a of the second arm 22.
4. The second arm 22 has a substantially L shape, and the lower end of the rear portion is twisted to form a switch pressing portion 22b of the motor M described later. The connecting tool 24
Is a bolt 24a whose head is supported by the first arm 18 with some play, and a second arm 2 which is screwed with the bolt 24a.
2 and a nut 24c fixed to the first arm 1
A coil spring 24b is provided between the bolt 24a and the nut 24c to buffer the operation of No. 8 and transmit it to the second arm 22.

As the motor M, a general-purpose small electric drill having a detachable battery B in a grip G is used as it is, and the ratchet L of the general electric drill grips the central shaft 12a of the transmission 12. The grip G of the motor M includes a pair of left and right rotation restraint plates 2
The grip G is attached to the support member 10 via 6, 26.
The switch S located at the base of the second arm 22 is brought into contact with the switch pressing portion 22b of the second arm 22. In order to prevent the wobbling of the motor M, a pair of left and right rotation restraint plates 2
6 and 26 are welded to the support member 10, and the rotation restraint plates 26 and 26 are
It is preferable to bridge the retaining pin 28 of the grip G at the rear end. If necessary, the platform 30 may be attached to the front part of the frame 2 so that the position thereof can be adjusted in the front-rear direction.

Next, the operation of actually harvesting strawberries using the work vehicle 1 will be described. When the operator sitting on the seat 8 shifts the center of gravity forward, the seat 8 slightly leans forward about the support shaft 6. The first arm 18 pivotally attached to the rear portion of the seat 8 tilts in the direction A in FIG. 1 about the support shaft 16, and the second arm 22 is pulled by the connecting tool 24 to center the support shaft 20. Tilt in the middle B direction. In this way, the switch pressing portion 22b of the second arm 22 presses the switch S to rotate the motor M, and the motor M slowly drives the wheels 4 and 4 via the transmission 12 and the T-shaped joint 13. Since the speed of the work vehicle 1 is almost the same as the walking speed, the operator's foot is not placed on the frame 2 but is lowered onto the ground, and the knees and lowers are moved slightly forward and backward in accordance with the forward movement of the work vehicle 1. You should go. During this time, both hands can be moved freely, so that strawberries can be continuously harvested along the ridges.

On the other hand, when it is necessary to stop the work vehicle 1, the worker may move the center of gravity on the seat 8 to the rear. That is,
When the seat 8 tilts slightly backward about the spindle 6, the first
The arm 18 and the second arm 22 tilt in the opposite direction to the above case, and the switch pressing portion 22b of the second arm 22 separates from the switch S of the motor M to stop the motor M. In this way, the work vehicle 1 can be moved forward and backward by changing the center of gravity of the operator on the seat 8 without using limbs, so that the handling is easy and clear for the elderly.

Further, in the work vehicle 1, since the rotation of the spindle of the motor M is greatly reduced by the transmission 12 to rotate the wheels 4 and 4 at a walking speed, various works can be performed safely and reliably. This can be done and the motor M is not overloaded. Therefore, a general-purpose small electric drill can be used as the motor M as it is for downsizing, and long-time work can be performed only by replacing the removable battery B. Furthermore, this motor M is a ratchet L
Since it is only supported by the retaining pin 28, it can be detached and used when an electric drill is required. Therefore, its maintenance is extremely easy.

The present embodiment is merely an example, and the shape of the frame 2, the arrangement of the motor M, and the like can be appropriately designed and changed according to the type of crop, and for example, the management of tall roses. When used for work or the like, the seat 8 may be mounted at a position higher than the above mounting position. The link portion 14 is not limited to the above configuration as long as the structure is such that the motor M is operated or stopped by tilting the seat 8. Although not shown,
By providing the wheels 3 and 3 with a camber angle, the stability is improved, and by making the wheels 3 and 3 toe-in, the straightness of forward traveling is improved.

[0015]

As described above, according to the work vehicle of the present invention, it is possible to move along the ridges by simply inclining the seat while continuing the work. it can. Also, since the whole is extremely small, it can be adapted to narrow ridges and can be handled easily. Although it has these excellent effects, since the internal mechanism is simple, the operation as well as the maintenance are easy.
Therefore, cultivation of vegetables and flowers, which many elderly people are engaged in,
Most suitable for various operations such as management and harvesting.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a work vehicle according to the present invention.

FIG. 2 is a front view showing an embodiment of a work vehicle according to the present invention.

[Explanation of symbols]

 M motor (general purpose electric drill) 1 work vehicle 2 frame 3,4 wheels 8 seats 12 transmission 14 link section 30 cargo bed

Claims (3)

[Claims] 1. A work vehicle comprising a motor for driving wheels, a seat tiltably provided in the vicinity of the wheels, and a link portion for actuating or stopping the motor by tilting the seat. 2. A frame having front and rear wheels and supporting a seat so as to be tiltable in the front-rear direction, and a motor detachably attached to the frame and connected to the wheels via a transmission. A work vehicle comprising a link portion arranged between the motor and the seat, for activating the motor when the seat leans forward and stopping the motor when the seat leans backward. 3. The frame is extendable and retractable and has a luggage carrier,
The work vehicle according to claim 2, wherein the motor is a general-purpose electric drill.