JPH0466523B2 - - Google Patents

Description

[Detailed description of the invention] The present invention has a planting section equipped with a seedling stand that reciprocates left and right, and a traveling section is installed on a traveling vehicle so that it can be raised and lowered freely, and the float ground pressure of the planting section is kept constant. The present invention relates to a riding rice transplanter equipped with a ground pressure sensor that keeps the planting depth constant.

Conventionally, the operator operates a sensitivity adjustment lever to set the ground pressure in advance according to the hardness of the field, so that in soft fields the float is tilted forward (within about 2 degrees of forward tilt); In hard fields, the float is tilted backwards (within about 6 degrees of backward tilt angle). Therefore, when a rolling sensor is installed to detect the ground pressure of the side floats in the planting area, by keeping the width of the dead zone constant for this rolling sensor, in soft fields where the floats are tilted forward, it is possible to If the planting part tilts to the left or right due to reciprocating movement, the swing angle of the float necessary for rolling control will become larger than the limit, and there is a risk that the front end of the float will plunge into the soil, and the ground pressure of the float may be reduced. By making the float smaller, the load shared by the float also becomes smaller, resulting in a problem that the rolling sensitivity due to the side float decreases.

However, the present invention provides a riding rice transplanter equipped with an elevating member that adjusts the planting section up and down based on the detection result of a ground pressure sensor, and a rolling member that adjusts the horizontal and horizontal inclination of the planting section based on the detection result of a rolling sensor. The attached control device is provided with a sensitivity adjustment lever that sets the planting ground pressure according to the hardness of the field, etc., and when the lever is adjusted in a direction to decrease the ground pressure detected by the ground pressure sensor, the rolling sensor The present invention is characterized in that the width of the dead zone is made small so that the control of the rolling member becomes sensitive.

Therefore, even if the planting ground pressure is set low in soft fields, etc., the planting part inclination can be quickly controlled by the rolling sensor in proportion to this. Accidents such as entering the soil can be avoided by reducing the swing angle, and the accuracy of planting can be easily improved by compensating for the decrease in sensitivity of the rolling sensor. Rolling control is performed when a constant ground pressure is applied to the side float provided with the rolling sensor, and the rolling control operation is performed appropriately regardless of the weight of the seedlings in the planting area.

Embodiments of the present invention will be described in detail below based on the drawings. Fig. 1 shows a side view of the riding rice transplanter, and Fig. 2 shows a plan view of the same. A front wheel 6 for running in paddy fields is supported on both sides of the front part of the transmission case 4 via a front axle case 5, and a transmission case 7, which is an axle case, is connected to both sides of the rear part of the transmission case 4. A rear wheel 8 for running in paddy fields is supported at the rear end of the transmission case 7. A spare seedling stand 10 is attached to the outside of both sides of the bonnet 9 that covers the engine 2, etc., and a vehicle body cover 12 forming a step 11 covers the transmission case 7, etc., and a driver's seat 13 is placed above the vehicle body cover 12. A steering wheel 14 is installed at the rear of the bonnet 9 in front of the driver's seat 13.

Furthermore, 15 in the figure is a planting section that has a seedling stand 16 for multi-row planting, a plurality of planting claws 17, etc., and the rear-tilting seedling stand 16 with a high front height and a low back is connected to a guide rail 18 and Planting case 2 via guide rail 19
The planting claw 17 is attached to the planting case 20 via a planting arm 21 that is supported on the left and right reciprocating sliding marks on the 0 and moved by a crank, and a planting claw drive shaft 22. A center float 23a and side floats 23b, 23b for leveling the planting surface, which are sliding bodies, are installed below the planting case 20, and a support frame 24 is provided on the front side of the planting case 20, and a top link 25 is installed. The support frame 24 is connected to the rear side of the traveling vehicle 1 via a three-point linkage mechanism 27 including a lower link 26, and the linkage mechanism 27
Hydraulic cylinder 2 that raises and lowers the planting section 15 via
8, and drives the front and rear wheels 6, 8 to run at a substantially constant speed, and at the same time slides back and forth from side to side.
The structure is such that one seedling is taken out by a planting claw 17 and rice planting work is performed continuously.

Further, in the figure, reference numeral 29 is a travel speed change lever, 30 is a planting lift lever, 31 is a sensitivity adjustment lever, 32 is a travel clutch pedal, and 33 is a left and right brake pedal.

As shown in FIGS. 3 and 4, a center pin 34 is provided protrudingly at the center of the front side of the planting case 20, and the pin 34 is attached to a receiver tube 35 at the lower end of the support frame 24.
4 is pivotally supported, and the planting part 15 is centered around the pin 34.
A rolling cylinder 36 is attached to the planting case 20, and the cylinder 3 is attached to the link plate 37 of the receiver tube 35.
6 piston rods 38 are connected to each other, and the horizontal support angle of the planting section 15 is changed by controlling the cylinder 36 to horizontally support the planting section 15.

Furthermore, as shown in FIGS. 5 to 7, one end of the swing links 40, 41, 41 is connected to the planting depth adjustment shaft 39 which is pivotally supported in the planting case 20, and the upper surface of each float 23a, 23b, 23b is Bracket 4
2, 43, 43 are ground pressure adjustment support shafts 44, 45, 4
5, the other ends of the links 40, 41, 41 are connected to each other, and the base end of the planting depth adjustment lever 46 is connected to the adjustment shaft 39, thereby adjusting the planting depth provided in the planting case 20. The intermediate part of the lever 46 is removably locked to the plate 46a, and by operating the lever 46, the planting case 20 and each float 2 are connected.
The planting depth is set by changing the relative support interval between 3a and 23b.

Also, a ground pressure detection arm 47 is a ground pressure sensor that detects changes in ground pressure based on the amount of swing of the center float 23a about the support shaft 44.
and a side float 2 centered on the support shaft 45.
A rolling detection arm 48 that is a rolling sensor that detects the left and right tilting of the planting section 15 based on the amount of swing of the planting section 3b is provided. and an intermediate link 49 that rotatably supports the intermediate portion on the adjustment shaft 39;
50 and the brackets 42, 43,
Both ends of the arms 47, 48 are connected, and intermediate output links 53, 54 are rotatably supported by the planting case 20 via support shafts 51, 52, and the other ends of the intermediate links 49, 50 are connected to each other. , and one end of the output links 53 and 54 are connected to rods 55 and 5.
6. Then, a ground pressure adjustment wire 57 and a rolling adjustment wire 58 are connected to the other ends of each of the output links 53 and 54, and
The outer wires 59 and 60 into which the wires 57 and 58 are inserted are placed in the planting case 20 with a bracket 61,
It is fixedly supported via 62.

Next, as shown in FIG. 8, a hydraulic cylinder 28 for raising and lowering the planting and a hydraulic cylinder 36 for adjusting rolling are installed.
Hydraulic switching valves 65 and 66 are respectively connected to hydraulic pumps 63 and 64, and the wires 57 and 58 are connected to the switching valves 65 and 66, respectively.
A ground pressure sensitivity adjustment spring 67 and a rolling sensitivity adjustment spring 68 wound around each wire 57, 58 are connected between each wire 57, 58 and the end of each outer wire 59, 60, and the center is centered on the support shaft 44. Due to the vertical movement of the front part of the center float 23a, the wire 57 moves back and forth against the spring 67, and the switching valve 65 is switched to operate the cylinder 28.
The planting portion 15 is raised and lowered to keep the ground pressure of the float 23a substantially constant, and the planting depth set by the planting depth adjustment lever 46 is maintained.
The wire 58 advances and retreats against the spring 68 due to the vertical movement of the front part of the side float 23b centered at 5, actuating the cylinder 36 via the switching valve 66, and detecting the horizontal inclination of the planting section 15. The planting portion 15 is supported substantially horizontally with respect to the rice field by tilting it to the opposite side.

Further, the base end of the sensitivity adjustment lever 31 is connected to a sensitivity adjustment shaft 69, the end of the outer wire 59 is connected and supported to a ground pressure sensitivity adjustment link 70 fixed to the shaft 69, and the rolling sensitivity adjustment lever 31 is fixed to the shaft 69. The outer wire 60 is attached to the adjustment link 71.
The ground pressure sensitivity adjustment link 70
The operating length L of the rolling sensitivity adjustment link 71 is made longer than the operating length l of the rolling sensitivity adjustment link 71, and each link 70, 71 is integrally displaced by operating the lever 31 to support each outer wire 59, 60. Change the position and extend and retract the wires 57 and 58 while keeping the switching valves 65 and 66 neutral, lifting the front parts of the floats 23a and 23b in hard fields, and lowering the front parts of the floats 23a and 23b in soft fields. In a standard field, the floats 23a and 23b are supported approximately horizontally, and the buoyancy of the floats 23a and 23b is changed by acting on the planting field surface, so that the support height (planting depth) of the planting case 20 relative to the planting field surface is adjusted. When the ground pressure of the floats 23a, 23b is maintained substantially constant and the ground pressure of the floats 23a, 23b is lowered by using the lever 31, the operating length l of each link 70, 71 is
Due to the difference in L, the side float 23b is lowered lower than the center float 23a, the forward inclination angle of the side float 23b is increased compared to the center float 23a, and the dead band width of the rolling control by the side float 23b and the wire 58 is reduced. It is constructed so that it can be precisely adjusted. As is clear from the above, based on the detection result of the ground pressure detection arm 47, which is a ground pressure sensor,
Hydraulic cylinder 28 is a lifting member that adjusts the lifting and lowering of the
and a rolling cylinder 36 which is a rolling member that adjusts the horizontal inclination of the planting section 15 based on the detection result of a rolling detection arm 48 which is a rolling sensor. A sensitivity adjustment lever 31 is provided for setting the ground pressure for planting, and when the lever 31 is adjusted in a direction to decrease the ground pressure detected by the ground pressure detection arm 47, the width of the dead zone of the rolling detection arm 48 is reduced. The structure is such that the control of the rolling cylinder 36 is sensitive.

The present invention is constructed as described above, and the sensitivity adjustment lever 31 is operated in accordance with the hardness of the field, which varies depending on the nature of sand and clay. By swinging the center float 23a in the vertical direction, the switching valve 65 is switched via the detection arm 47 and the wire 57, and the hydraulic cylinder 28 is operated to operate the planting section 1.
5 is raised and lowered, and the ground pressure of the float 23a is maintained substantially constant, thereby maintaining the planting depth substantially constant.

Furthermore, when the planting section 15 tilts to the left or right due to left and right reciprocation of the seedling platform 16, the switching valve 66 is switched via the detection arm 48 and the wire 58, and the hydraulic cylinder 36 is actuated to move the planting section 15 in the opposite direction. The planting section 15 is tilted so that the planting section 1 is placed approximately horizontally to the planting field surface.
5, and when the floats 23a and 23b are tilted forward in a soft field and supported in a position that reduces ground pressure, the center float 23a
The front part of the side float 23b is at a lower position than the front part, and the ground pressure acting on the side float 23b is higher than when the field is hard or in standard conditions, and the left and right side floats 23b are lowered by a small ground pressure change. , 23b are raised and lowered, and the rolling control operation by the hydraulic cylinder 36 is performed quickly.

As is clear from the above embodiments, the present invention includes an elevating member 28 that adjusts the elevation of the planting section 15 based on the detection result of the ground pressure sensor 47, and a rolling sensor 4.
In the planting control device of a riding rice transplanter, which is equipped with a rolling member 36 that adjusts the horizontal inclination of the planting section 15 based on the detection result of 8, the sensitivity adjustment lever 31 that sets the planting ground pressure according to the hardness of the field, etc. established,
When the ground pressure detected by the ground pressure sensor 47 is adjusted by the lever 31 in the direction of decreasing, the width of the dead zone of the rolling sensor 48 is made small so that the control of the rolling member 36 becomes sensitive, Even if the planting ground pressure is set to a small value in a soft field, etc., the planting part inclination control can be quickly obtained by the rolling sensor 48 in proportion to this. Accidents such as entering the soil can be avoided by reducing the swing angle of the rolling sensor 48, and it is possible to compensate for the decrease in sensitivity of the rolling sensor 48 and easily improve the planting accuracy. Regardless of the amount, if a constant ground pressure is applied to the side float 23b provided with the rolling sensor 48, rolling control is performed, and the rolling control operation is performed appropriately regardless of the weight of the seedlings in the planting section 15. .

[Brief explanation of drawings]

Fig. 1 is an overall side view showing one embodiment of the present invention, Fig. 2 is a plan view of the same, Fig. 3 is a side view of the planting case, Fig. 4 is a front view of the same, and Fig. 5 is a side view of the center float. 6 is a side view of the side float, FIG. 7 is a plan view of the float, and FIG. 8 is an operating system diagram. 1... Travel vehicle, 15... Planting section, 16... Seedling stand, 2
3a... Center float, 23b... Side float, 31... Sensitivity adjustment lever, 47... Ground pressure detection arm (ground pressure sensor), 48... Rolling detection arm (rolling sensor).

Claims (1)

[Claims] 1. A riding rice transplanter comprising an elevating member 28 that adjusts the raising and lowering of the planting section 15 based on the detection result of the ground pressure sensor 47, and a rolling member 36 that adjusts the left and right inclination of the planting section 15 based on the detection result of the rolling sensor 48. In the planting control device, a sensitivity adjustment lever 31 sets the planting ground pressure according to the hardness of the field, etc.
A ground pressure sensor 47 is provided by the lever 31.
A planting control device for a riding rice transplanter, characterized in that the dead zone width of the rolling sensor 48 is made smaller to make the control of the rolling member 36 more sensitive when the detected ground pressure is adjusted in the direction of decreasing. .