JPH0316081B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rice transplanter provided with a hydraulic cylinder that changes the support height of planting claws relative to wheels for traveling.

Conventionally, as shown in Japanese Unexamined Patent Publication No. 53-138824, there has been a technology that detects the vertical movement of the front part of the float and automatically controls a hydraulic cylinder to maintain the planting depth of the planting claw at a substantially constant level.

However, since the above-mentioned conventional technology only corrects the changing float posture by manually adjusting the planting depth, when the float moves forward up or down due to a change in field hardness, for example, the hydraulic pressure There were functional problems such as the cylinder operating and changing the planting depth of the planting nails.

However, the present invention detects a change in planting depth based on the vertical movement of the front part of the float, automatically controls a hydraulic cylinder that changes the support height of the planting claw, and maintains the planting depth of the planting claw at a substantially constant level. The rice transplanter is characterized in that it is provided with a lever for changing the neutral position of the automatic planting depth control by the hydraulic cylinder, and is configured to perform the lever adjustment independently of the manual planting depth adjustment.

Therefore, since the lever adjustment for changing the neutral position of the automatic planting depth control using the hydraulic cylinder is performed independently of the manual planting depth adjustment, it is possible for the float to take a forward-upward or forward-downward posture due to changes in field hardness, etc. However, the planting depth of the planting claw can be maintained at a predetermined depth, and the planting depth control function using the float and hydraulic cylinder can be easily improved.

Embodiments of the present invention will be described in detail below based on the drawings. FIG. 1 is a schematic side view of a rice transplanter for four-row planting, in which 1 is an engine, 2 is a machine base on which the engine 1 is mounted, 3 is a main transmission case fixed to the rear end of the machine base 2, Reference numeral 4 denotes a planting transmission case fixed to the main transmission case 3 via a transmission case 5, 6 a planting claw drive case supported on both sides of the planting transmission case 4, and 7 based on the cases 4 and 6. 11 is a steering handle whose ends are connected and supported, and 8 is a rear-tilt seedling stand with a low front and rear height that is provided along the upper surface of the handle 7 via a guide rail 9 and a sliding rail 10 and is movable back and forth from side to side. 12 is a bonnet that covers the upper surface of the engine 1 and the main transmission case 3; 13 is a side cover; 14 is connected to the rear surface of the bonnet 12; 15 is a spare seedling stand, 16 is a recoil start handle, 17
18 is a side clutch lever, 19 is a planting clutch lever, 20 is a paddy wheel attached to the side of the transmission case 3 via a swing case 21, 22 is a main float, 23 is a side float, and 24 is a float Ground pressure detection sensor,
Reference numeral 25 denotes a lift arm whose one end is connected via a suspension rod 26 to the middle of the swing case 21, which is rotatably supported in the middle by the main transmission case 3 via a shaft 30; and 27, a lift arm 25.
A sliding plate whose other end is connected via a connecting rod 28 and an absorber 29. The sliding plate 27 is loosely inserted into a long groove 31 formed on the side of the machine base 2, and the plate 27 is inserted in the longitudinal direction of the machine body. is configured to slide and move, determine the amount of entry and exit of the paddy wheel 20, and adjust the weight of the machine loaded on the paddy wheel 20 and the floats 22, 23.

As shown in FIGS. 2 and 3, a hydraulic pump 32 is attached to the upper surface of the machine base 2 in front of the main transmission case 3, and a hydraulic switching valve 33 is provided on the outside of the pump 32. A hydraulic cylinder 34 is installed on the lower surface, and an oil pipe 3 is connected to the switching valve 33.
5, the tip of the piston rod 34a of the cylinder 34 is connected to the middle of the sliding plate 27, high pressure oil from the pump 32 is supplied to the cylinder 34 through the switching valve 33, and the piston rod 34a of the cylinder 34 is 34a to move the sliding plate 27 to the front end of the machine base 2, rotate the left and right lift arms 25, 25 to push down the left and right swing cases 21, 21, and move the left and right paddy wheels 20, 20 to the machine body. It is configured to project downward, that is, to raise the body including the engine 1, the cases 3, 4, 5, the seedling stand 8, and the like.

Further, a horizontal shaft 37 is provided which is connected to the spool 33a of the switching valve 33 via a contact plate 36, and the horizontal shaft 37 is mounted on each bracket 38, 39,
A manual lifting arm 40 connected to the wheel entry/exit lever 17 is provided on the horizontal shaft 37, and an automatic lifting arm 41 connected to the float ground pressure detection sensor 24.
is provided on the horizontal axis 37, and is formed so that the body can be raised and lowered manually or automatically. A sensing rod 42 on which the sensor 24 is installed is attached to a fulcrum shaft 43 on the machine base 2.
A sensing arm 44, which is supported via the fulcrum shaft 43, is connected to the arm 41 via a vertical rod 45.
A spring 46 that moves the sensor 24 upward with the sensor 1 stopped is stretched between the rod 42 and the arm 44, and a stopper 47 that stops the rod 42 and the arm 44 against the spring 46 is provided on the arm 44. Wheel extension adjustment links 48 and 49 are integrally connected to the rod 42 and arm 44, and a wire 51 connecting the outer 50 to one link 49 is connected and fixed to the other link 48,
The wire 51 is connected to a wheel extension adjustment lever 52 provided on the handle 7, and by operating the lever 52, the sensor 24 is moved downward while the arm 41 is stopped, and the sensor 24 is moved to the neutral position, that is, the switching valve. 33 is changed via the lever 52, and the paddy wheel 20 is controlled by the sensor 24.
The sensor 24 is configured to change the range of movement in and out of the paddy wheel 20, and adjust the movement in and out using the sensor 24 while supporting the paddy wheel 20 at a relatively high position or a relatively low position with respect to the aircraft body.

As is clear from the above, changes in planting depth are detected based on the vertical movement of the front part of the float 22, and the planting claw 11
In a rice transplanter that automatically controls a hydraulic cylinder 34 that changes the support height of the planting claw 11 to keep the planting depth of the planting claws 11 substantially constant, a lever 52 that changes the neutral position of automatic planting depth control by the hydraulic cylinder 34. established,
The lever 52 is adjusted independently of the manual planting depth adjustment, and when the depth of the mud up to the tiller changes and the support height of the planting claws 11 relative to the rice field changes, the amount of sinking of the float 22 changes. changes and float 2
2, the front part is raised or lowered, the switching valve 33 is switched via the sensor 24, and the hydraulic cylinder 34 is operated to adjust the support height of the planting claw 11, so that the support height of the planting claw 11, that is, the planting depth is approximately In addition to keeping it constant, even at a predetermined planting depth, the amount of sinking of the float 22 changes depending on the field hardness, and the attitude of the float 22 changes,
Since it is necessary to support the float 22 in the neutral position in the forward upward direction or forward downward direction, the neutral position of the automatic planting depth control of the hydraulic cylinder 34 is changed by operating the lever 52 to maintain the predetermined planting depth while maintaining the neutral position. Float 22 Change only the posture to forward up or forward down,
It is configured to respond to changes in field hardness.

The present invention is constructed as described above, and the seedling platform 8 is reciprocated from side to side, and one seedling is taken out from the seedling platform 8 by the planting claw 11 and planted continuously. When the machine reaches the ridge and turns to change the direction of the entire machine, operate the planting clutch lever 19 to stop the seedling platform 8 and the planting claws 11, and at the same time lift the floats 22 and 23 to move to the field. Speaking from the planting side, the operator lifts the steering handle 7 and operates either the left or right side clutch lever 18 with the entire fuselage and floats 22 and 23 supported by the paddy wheels 20 in the same way as in the road running position. death,
During the turning operation, the wire 51 is extended by operating the wheel extension adjustment lever 52, and the sensing rod 42 is moved by the spring 46 while the automatic lifting arm 41 is stopped. It rotates upward, displacing the neutral position of the ground pressure detection sensor 24 with respect to the switching valve 33 to a relatively high position, and displacing the spool 33a of the switching valve 33 via the manual lifting arm 40 by operating the wheel in/out lever 17. , high pressure oil is supplied to the cylinder 34 via the switching valve 33, and the piston rod 34a is
The lift arm 25 is rotated by protruding, and the paddy wheels 20 are protruded and the fuselage and floats 22, 2 are rotated.
3 above the planting surface of the field, and then press the lever 5.
By moving the second sensor 24, the floats 22 and 23 can be raised relatively high while the amount of the wheel 20 being protruded is increased by a certain amount. Further, during rice planting work, when it becomes impossible to adjust the amount of output of the paddy wheel 20 by the sensor 24 due to the depth of the field, etc., the neutral position of the sensor 24 is moved up and down by operating the lever 52, and the The operating range of the rice paddy wheels 20 is changed by the sensor 24, and wheel entry/exit adjustment suitable for the planting situation is performed via the sensor 24, thereby maintaining the machine running attitude in an optimal state.

Furthermore, FIG. 5 shows another embodiment, in which a sensing rod 42 to which a float ground pressure detection sensor 24 is attached is attached to a sensing arm 53 on a fulcrum shaft 43.
The upper vertical rod 54 is connected to the automatic lifting arm 41 and the lower vertical rod 55 is connected to the sensing arm 53, and a guide rod 56 through which the lower end of the upper vertical rod 54 is inserted is connected to the lower vertical rod 55. Fixed and opposing wheel extension adjustment arms 57, 58 are integrally formed on each rod 54, 55,
A wire 51 connecting the outer 50 to one arm 58 is coupled and fixed to the other arm 57, and the wire 51 is connected to the wheel extension adjustment lever 52. By operating the lever 52, the arm 41
While the sensor 24 is moved upward with the arm 41 stopped, the sensor 24 is moved upward with the arm 41 stopped.
A spring 59 for lowering the arm 57,
A stopper 60 is installed between the rods 58 and 58 to stop each rod 54 and 55 against the spring 59.
4, and each rod 54, 55 is adjusted to expand or contract by operating the lever 52, and the arm 41
displacing the relative position of the sensor 24 with respect to
The neutral position of the sensor 24, that is, the position relative to the switching valve 33, is changed via the lever 52, and the range of movement of the paddy wheel 20 in and out by the sensor 24 is changed, and the same as in the above embodiment is performed during turning work and planting work. This allows you to obtain the desired aircraft attitude.

As is clear from the above embodiments, the present invention detects a change in planting depth based on the vertical movement of the front part of the float 22, automatically controls the hydraulic cylinder 34 that changes the support height of the planting claw 11, and In the rice transplanter that maintains the planting depth of the attached claws 11 substantially constant, the hydraulic cylinder 3
A lever 52 is provided to change the neutral position of the automatic planting depth control by the hydraulic cylinder 34, and the lever 52 is adjusted independently of the manual planting depth adjustment. Since the adjustment of the lever 52 for changing the planting depth is performed independently of the manual planting depth adjustment, the planting depth of the planting claw 11 can be adjusted even if the float 22 is in the forward upward or forward downward position due to changes in field hardness, etc. It is possible to maintain a predetermined depth, and it is possible to easily improve the planting depth control function using the float 22 and the hydraulic cylinder 34.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view of a rice transplanter showing an embodiment of the present invention, Fig. 2 is a plan view of the main parts, Fig. 3 is a side view of the same, Fig. 4 is an enlarged view of the same part, and Fig. 5 is a schematic side view of a rice transplanter showing an embodiment of the present invention. FIG. 7 is an enlarged side view of main parts showing another embodiment. 20...Paddy wheel, 22,23...Float,
24...Ground pressure detection sensor, 52...Wheel extension adjustment lever.

Claims (1)

[Claims] 1 Detects a change in planting depth based on the vertical movement of the front part of the float 22, automatically controls the hydraulic cylinder 34 that changes the support height of the planting claw 11, and keeps the planting depth of the planting claw 11 approximately constant. A rice transplanter characterized in that a lever 52 is provided to change the neutral position of automatic planting depth control by the hydraulic cylinder 34, and the lever 52 is adjusted independently of manual planting depth adjustment. .