JPH0463752B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a traveling vehicle that moves back and forth along paths between ridges for spraying pesticides on seedlings, crops, etc. in the ridges.

(Prior art and its problems) Conventionally, pesticide spraying on seedlings and crops was carried out by wearing protective gear and using masks, but since it was still harmful, recently the sprayer was fixed to a sled and sprayed with a rope or liquid spray. The idea is to use a sled pulled by a hose for safe spraying.

However, pulling the sled requires physical strength, and there is a problem in that the worker must move to the opposite side to pull the sled after setting the sled when re-spraying on the way back or spraying the next row. It's difficult to handle.

(Means for Solving the Problems) Therefore, it is an object of the present invention to provide a wheel running type vehicle that can reciprocate and travel along a path between furrows.

For this reason, the present invention provides a vehicle in which a pair of axles with wheels on both sides are connected to a frame and has a reversible wheel rotation drive device, in which each axle is rotatably connected near the wheels. A pair of support members are connected to the frame side so as to be rotatable back and forth, and a front pair of support rods and a rear pair of support rods are arranged facing each other with inward inclinations, and a stopper is provided that connects to each support rod. A stopper mechanism is provided to prevent the back and forth rotation of one pair of support rods, and a stopper switching mechanism that opens the one pair of support rods and prevents the other pair of support rods from back and forth rotation with the stopper. It is configured with the following.

(Function) Prior to the drive rotation of the reversible rotation drive device, the stopper mechanism first locks the rear pair of support rods in the running direction, and then the drive wheels rotate and move forward. At this time, the front pair of support rods are released from the stopper and can be rotated back and forth.

When reversing, the stopper stops the front pair of support rods by the stopper's switching mechanism, and then the rotary drive device is reversed, causing the drive wheels to reverse and travel backwards.

At this time, the stoppers are removed from the rear pair of support rods, allowing for forward and backward rotation.

When driving forward or backward, the front support rods facing the direction of travel can be rotated back and forth with the stopper removed, so one of the front wheels begins to climb up the slope of the ridge. The supporting rod rotates forward and the wheel moves upward a little. For this reason, that wheel is located slightly in front of the other front wheel, resulting in an oblique state in which the front pair of wheels face toward the inner aisle. Therefore, the wheels always travel on a path whose trajectory is adjusted toward the path.

(Example) Hereinafter, details of the present invention will be explained with reference to illustrated embodiments.

In the traveling vehicle S shown in FIGS. 1 to 5, reference numeral 1 denotes a frame, and a rotating shaft 2, 2 is rotatably provided with a bearing 2a at a short distance in the center as shown in FIG. There is. Reference numeral 3 denotes a stopper, which has an inclined surface 3a cut out in the center of each as shown in FIG.
are set up opposite. The stopper 3 is fixed to the center of guide rails 4 arranged on both sides of the frame 1,
The rail 4 includes front and rear connecting plates 5 placed on the frame 1,
It is united by the connection of 6. The rail 4
Below, guide pieces 4b are protruded downward in close proximity to both sides of the frame 1, thereby guiding the movement of the connecting plate 5. Further, a long groove 4a is provided in the center of each rail 4.

Bearings 5a, 6 are attached to the connecting plates 5, 6 as shown in FIG.
A drive shaft 7 is mounted in the front-back direction by a, and a pulley 9 and a worm 10 are fixed so that the drive shaft 7 can be rotated by a motor M which is suspended from the connecting plate 5 via a holding member 8. .

On the other hand, support rods 12 are attached to both ends of each of the rotating shafts 2, 2 via mounting members 11 so as to be rotatable in the front and back direction, and each support rod 12 is tilted inward so that the side surfaces are The letters are arranged symmetrically. Further, the upper part of each support rod 12 serves as a hook portion 12a, and the hook portion 12a projects through the long groove 4a of the rail 4.

In addition, the stoppers 3 are attached to the front and rear latching portions 12, respectively.
It is placed between a.

Axles 13 are rotatably attached to the lower tips of the support rods 12 on both sides and are installed in the front and back, and wheels 14 are fixed to both ends of each axle 13. Note that each support rod 12 is connected to the axle 1 on the inside near the wheel.
It is connected to 3.

Chain gears 2b and 13a are fixed to the center portions of the rotating shafts 2 and axles 13, respectively, and are connected to the chain 15, and a chain 20 is connected between the chain gears 2c and 2c fixed opposite to the respective rotating shafts 2. are doing.

Further, a worm wheel 16 is fixed to the rear rotating shaft 2 and meshes with a worm gear 10 of the drive shaft 7.

In addition, 17 is a spring that supports the support rod 12 and is attached to the frame 1.
and approximately the center of the support rod 12.

Further, reference numeral 18 denotes an auxiliary wheel, which is attached to an arm 19 attached to the frame 1. Furthermore, reference numeral 22 shown by imaginary lines in FIG. 2 is a frame, which covers and is fixed to the frame 1.

Next, the operation of this example will be explained. When the stopper 3 in FIG. 1 is in the retracted position and comes into contact with the rear support rod 12 and the rear support rod 12 cannot rotate, when the motor M is driven in the normal rotation, the pulley 9 is rotated by the belt 21. In order to
rotates. This causes the other axle 13 to rotate and the front rotating shaft 2 to rotate via the chain 20, so the front axle 13 also rotates via the chain 15, causing all wheels 14 to rotate and the vehicle to travel forward.
Note that the pedestal 22 is equipped with rotating blades 23 as shown in FIG.
is equipped with nozzle 2 that drops the pesticide onto it.
4 is installed connected to the hose 25. Therefore, pesticides can be sprayed onto the ridges as the vehicle S travels.

However, since the path between the furrows is not straight, the vehicle S may deviate from the path.

That is, one of the front wheels 14' facing in the direction of travel
However, in this example, the front axle 13 is rotatable by the support gap 12 that is not in contact with the stopper 3. On the other hand, the axle 14' pivots upward according to the inclined surface. At this time, the other front wheel 14
remains the same, so one wheel 14' has moved upward.
is located slightly in front of the other wheels.

Therefore, as shown in FIG. 9, the axle 13' is in an oblique state facing toward the road, and the wheels 14 are corrected in trajectory toward the road as the vehicle travels. As a result, the vehicle S travels along the furrowed path while constantly correcting its trajectory.

When the vehicle S travels to the end of the ridge, the motor M is rotated in the reverse direction.
Then, the drive shaft 7 is reversed in the same manner as described above, and the rotation shaft 2,
Since the axle 13 is reversed, the vehicle S travels backwards, and the pesticide is sprayed while traveling backwards.

However, the reverse rotation of the motor M does not immediately rotate the axle 13 and cause the vehicle to travel backward.

That is, as the motor M rotates, the drive shaft 7 rotates and the worm 10 also rotates, but at this time, the unloaded worm 10 is screwed forward by the worm wheel 16 (Fig. 4, virtual). As a result, the drive shaft 7 moves forward, so that the rail 4 fixed to the connecting plate 5 and the motor M move forward together along the frame 1. When the stopper 3 comes into contact with the latching portion 12a of the front support rod 12, the worm 10 becomes loaded and screw feeding is stopped, so that the worm 10 rotates the worm wheel 16 and moves backward for the first time. In this case, stopper 3
Because it comes off from the rear support rod 12, the rear support rod 12
Since it is rotatable, it travels backwards while constantly correcting its trajectory as described above.

When the traveling vehicle travels to the backward end, the traveling vehicle S may be moved to the adjacent furrow passage, and the motor M may be switched to drive forward rotation. As a result, the stopper 3 moves backward as the worm 10 is screwed in the same manner as described above, and after contacting the catch portion 12a of the rear support rod 12, the stopper 3 rotates the worm wheel 16 and moves forward.

In this way, according to the present example, by driving the motor M, the drive shaft 7 is first screw-fed to move the rail 4, and thereby the stopper 3 is moved so as to come into contact with the support rod 12 after facing in the running direction. At the same time, the front support rod 12 is opened. Therefore, the front support rod 12 can be rotated back and forth, but the rear support rod 12 is prevented from rotating. After the stopper 3 is moved, the worm wheel 16 is rotated to rotate the rotating shaft 2 and the axle 13, and the vehicle travels.

Therefore, since the support rod 12 on the front side in the direction of travel can be rotated at all times, when the vehicle starts to climb an inclined surface, its wheels move upward, so that the axle is slanted toward the aisle, and the vehicle travels toward the aisle. The trajectory will be corrected. At this time, since the rear support rod 12 is fixed, there is no problem in trajectory correction.

In this way, the vehicle can be driven back and forth and can travel even if the path is meandering.

Although this example is configured as described above, the present invention is not limited thereto.

For example, the shape and structure of the support rod are not limited, and the connection structure between the frame side and the axle is also suitable.

Further, the configuration of the stopper mechanism is not limited, and the sixth
7, a stopper 25 may be attached to a movable moving member 26 and locked to a support rod 27.

Further, the configuration of the switching mechanism for switching the stopper before the wheel rotates may be arbitrary, and a configuration may be adopted in which a motor separate from the wheel drive motor is provided to switch and displace the stopper.

The wheels may be either four-wheel drive or two-wheel drive.
The reversible rotation drive device may be an engine.

Further, the traveling vehicle of the present invention may be used for other purposes such as spraying pesticides, and in the case of spraying pesticides, the frame may be equipped with a reel so that the hose that has been let out can be automatically wound around the reel when reversing.

(Effects of the Invention) Therefore, according to the present invention, it is possible to travel back and forth along the path between the furrows, and even if the path is meandering, it can move along the path by itself, which has a great effect, and it cannot be used for spraying harmful agricultural chemicals. It is excellent.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an embodiment of the present invention excluding the pedestal, Fig. 2 is a side view thereof, Fig. 3 is a partially longitudinally sectional rear view, and Fig. 4 is A-A in Fig. 3. An enlarged sectional view, FIG. 5 is an enlarged longitudinal sectional view of the stopper part,
FIG. 6 is a side view of the main parts showing another example of the stopper mechanism;
FIG. 7 is an enlarged longitudinal cross-sectional view of the vehicle, FIG. 8 is a rear view of the vehicle in a running state, and FIG. 9 is a diagram of the arrangement of the wheels when the vehicle is climbing up a slope. 1: Frame, 2: Rotating shaft, 3, 25: Stopper,
4: Rail, 5, 6: Connection plate, 7: Drive shaft, 1
0: Worm, 11: Mounting member, 12, 27: Support rod, 13: Axle, 14: Wheel, 15, 20: Chain, 16: Worm wheel, 17: Spring, 2
1: Belt, M: Motor.

Claims (1)

[Claims] 1. In a traveling vehicle that has a pair of axles with wheels on both sides connected to the frame and has a reversible rotation drive device for the wheels, a pair of supporting members each of which has each axle rotatably connected near the wheels is provided. It is connected to the frame side so as to be rotatable back and forth, and has a front pair of support rods and a rear pair of support rods each inclined inward and arranged opposite each other, and has a stopper connected to each support rod, and one pair A stopper mechanism for preventing back and forth rotation of the support rods is provided, and a stopper switching mechanism is provided for opening one of the pair of support rods and using the stopper to prevent the other pair of support rods from back and forth rotation. The car runs along the furrowed path.