JPH088572Y2 - Rice transplanter depth control device - Google Patents

Description

[Detailed description of the device] "Industrial application field" The present invention is an automatic planting depth control mechanism that keeps the planting depth of seedlings constant, and a sensitivity adjustment that adjusts the automatic planting depth control sensitivity according to the hardness of the topsoil. The present invention relates to a planting depth control device for a rice transplanter equipped with a lever.

[Prior Art] Conventionally, as shown in Japanese Patent Laid-Open No. 60-114109, when the sensitivity of automatic control of planting depth of seedlings is made sensitive, the planting depth is automatically corrected to the deep planting side, and the insensitive side. There is a technology that automatically corrects it to the shallow planting side when it is turned on. Further, as disclosed in Japanese Patent Laid-Open No. 63-91008, there has been a technique of providing a sensor for detecting the operation of a sensitivity adjusting lever for setting the sensitivity of automatic control of the plant depth.

[Problems to be Solved by the Invention] In the conventional technology, the sensitivity adjusting lever is connected to a planting depth changing link via a planting depth changing wire, and the planting depth adjusting lever is connected to the planting depth changing link to make a uniform surface. Since the flat-use floats were connected, it is necessary to provide multiple sets of planting depth changing wires and planting depth changing links for multiple floats in the multi-row planter, and it is easy to simplify the planting depth changing structure using the sensitivity adjustment lever. However, there is a problem that the sensitivity adjusting lever operating force to be lifted against the float weight cannot be easily reduced. Moreover, since the hydraulic switching valve for raising and lowering the planting part, the connection mechanism for controlling the planting depth of the float, and the sensitivity adjusting lever and the connection mechanism for setting the sensitivity of the float are separately configured, the number of components to be connected to the float is easy. There is also a problem that the float support structure cannot be easily simplified or the like.

[Means for Solving the Problem] However, according to the present invention, the center float for flattening the field is connected by the sensor wire to the switching cam of the hydraulic switching valve that controls the elevation of the planting part, and the sensor wire is connected to the sensitivity adjusting lever. The planting depth adjustment lever that adjusts the height of the center float with respect to the aircraft body is detachably locked to the guide plate. In the planting depth control device of rice transplanter, the planting depth adjustment motor that moves the guide plate in the same direction as the center float adjustment, the limit switch that detects the moving end of the guide plate by the planting depth adjustment motor, and the displacement of the sensitivity adjustment lever In addition to installing a potentiometer-type sensitivity sensor that detects the amount and a potentiometer-type correction amount sensor that detects the displacement of the guide plate, It is characterized in that a controller is provided for automatically controlling the vegetation depth adjusting motor by operating the node lever to keep the relative values of the sensitivity sensor and the correction amount sensor substantially constant.

[Operation] Therefore, the operation amount of the sensitivity adjusting lever is detected by the sensitivity sensor, and the operation amount of the planting depth adjusting lever by the planting depth adjusting motor is detected by the correction amount sensor, and the planting depth is set within the limit switch setting range. Since the adjustment motor is automatically operated and controlled, it is not necessary to connect multiple floats for multi-row planting and the sensitivity adjustment lever respectively, and the sensitivity adjustment lever simplifies the structure for changing the implantation depth and reduces the sensitivity adjustment lever operation force. And the like, and since the sensitivity adjustment lever operation and the implantation depth adjusting motor provided in the middle of the connection for controlling the implantation depth of the hydraulic switching valve and the center float are interlocked,
The number of components connected to the center float can be reduced compared to the conventional one, and the float support structure can be simplified easily.
Moreover, the above-mentioned sensors and motors can be easily installed without making much improvement to the conventional model in which the planting depth detection sensitivity is not corrected and the planting depth control function is improved and the manufacturing cost is improved. Both of the above can be easily achieved.

[Embodiment] An embodiment of the present invention will be described below in detail with reference to the drawings. First
The figure is a side view of the planting section, FIG. 2 is a side view of the riding rice transplanter, and FIG. 3 is a plan view of the same. In the figure, (1) is a traveling vehicle on which an operator rides, and an engine (2 The rear end of the vehicle body frame (3) carrying (1) is connected to the mission case (4), and front wheels (6) for traveling paddy fields are supported on both front sides of the mission case (4) via front axle cases (5). At the same time, the rear wheels (8) for traveling the paddy field are supported on both rear sides of the mission case (4) through the rear axle case (7). Then, a spare seedling mounting table (10) is appropriately attached to both outer sides of the hood (9) covering the engine (2), and the axle case (5) (7) is formed by a vehicle body cover (12) forming a step (11). Etc., a driver's seat (13) is attached to the upper part of the vehicle body cover (12), and a steering handle (14) is provided in front of the driver's seat (13) at the rear of the bonnet (9).

Further, (15) in the figure is a planting part having a seedling platform (16) for multi-row planting and a plurality of planting claws (17) ...
The front-rear-low-rear tilting type seedling stand (16) is supported on the planting case (20) via the guide rail (18) and the guide rail (19) so as to be slidable left and right, and in one direction. A rotary case (21) that rotates at a constant speed is supported by the planted case (20), and a pair of claw cases (22) (22) are arranged at symmetrical positions with respect to the rotation axis of the case (21). , Attach the planting claws (17) (17) to the tip of the claw case (22). Further, a support frame (24) is provided on the front side of the planting case (20) via a rotation fulcrum shaft (23), and a three-point link mechanism (27) including a top link (25) and a lower link (26) is provided. A supporting frame (24) is connected to the rear side of the traveling vehicle (1) via the linking mechanism (27), and a lifting cylinder (28) for lifting and lowering the planting part (15) is provided. ) (8) is driven to move at a substantially constant speed, and at the same time, two planting claws (17) (17) (17) (17) by one rotation of the rotary case (21) from the seedling table (16) that slides back and forth to the left and right. ) Took out two seedlings,
It is configured to continuously perform seedling planting work.

Further, in the figure, (29) is a traveling shift lever, (30) is a planting lift lever, (31) is a planting sensitivity adjusting lever which is a sensitivity adjusting element, (32) is a traveling clutch pedal, and (33) and (33) are The left and right brake pedals.

As shown in FIGS. 4 to 5, a center float (34), which is a float sensor, is located in the lower center of the planting part (15).
In addition, the side floats (35) (35) are arranged on both the left and right sides, and the rear part of the left and right side floats (35) (35) is planted with a planting depth adjusting link (36). 2
0) The planting case (20) is supported by the lower planting depth adjustment fulcrum shaft, which will be described later, and the front part is supported by a buffer link (37).
Supports the lower side. Further, the center float (34) has two planting depth adjusting links (36) (3
6), and the left and right sides of the front part are supported by two sensor links (38) and left links (39) to form a four-point support structure. As shown in FIG. A pitching fulcrum shaft (40) for swingably supporting the front part of the (34) up and down is provided in a bracket (41) on the rear upper surface of the float (34). Then, the planting depth adjusting fulcrum shaft (42) is rotatably supported on the planting case (20), and the planting depth adjusting link (36) having the base end fixed to the adjusting fulcrum shaft (42) is fixed. (36) The tip of the output link (44) is rotatably supported by the support shaft (43) of the planting case (20) while the tip end is connected to the pitching fulcrum shaft (40). 44) Detecting arm (46) via the connecting pin (45) at the rear end
The tip end is connected, and the detection arm (46) base end is fixed to the adjustment fulcrum shaft (42), and the output link (4
4) The sensor wire (48), which is an inner wire, is connected to the tip via a pin (47). Further, the sensor link (38), which is an outer receiving arm for detecting a change in the support angle of the float (34) due to vertical swinging of the center float (34) centering around the pitching fulcrum shaft (40), is attached to the bracket (49). ) And a pin (50) to support the upper surface of the front part of the float (34), and the pin (47) at the tip of the output link (44) is engaged and connected to the long hole (51) of the sensor link (38). Together with the support shaft (43) via the arm (44a), the pin (4
7) are connected and the sensor wire (inner wire) (4
One end of the outer wire (52) into which 8) is inserted is fixed to the sensor link (38).

In the bracket (49), the lower mounting plate (49a) is attached to a pair of left and right bolts (5
3) Fixed support is provided via (53), and support plates (49b) (49b) for mounting the pin (50) are hung vertically to the right side of the center, and an L-shaped left side bracket (54) is leftward from the center. Is provided via a bolt (55). Then, the left link (39) is supported by the bracket (54) through the pin (56), and the pin (47) is attached to the tip of the left arm (57) that pivotally supports the base end of the support shaft (43). The elongated hole (58) of the left side link (39) is engaged and connected through a pin (59) extending the same axis. The support shaft (43) is fixedly supported by a bearing bracket (60) to which the rotation support shaft (23) is attached via left and right pivot plates (61) (61).

Furthermore, a hydraulic switching valve (62) for supplying hydraulic pressure from a hydraulic pump to the hydraulic cylinder (28) is provided, and the switching valve (6
Switching cam (6) that contacts the middle with the spool (63) of 2)
4) One end of the sensor wire (inner wire) (48)
And the other end of the cam (64) is pivotally supported on the machine-body side fixed support shaft (65), and the spring (66) for separating the switching cam (64) from the spool (63) is attached to the cam (64). 64)
The extended portion at the other end and the rear vertical frame (6) of the vehicle body frame (3)
7) are connected via a spring pressure adjusting member (68). Further, a vehicle body cover (12) in which the switching valve (62) and the like are installed.
The sensor wire is attached to the sensitivity adjusting arm (70) which rotatably supports the base end portion of the sensitivity adjusting lever (31) through the implantation depth fulcrum shaft (69) and pivotally supports the base end on the fulcrum shaft (69). (Inner wire) (48) is connected, and the switching cam (6
4) The adjustment arm (70) is interlocked with the link (71) and the switching cam (64) and the link (71) are neutralized by operating the lever (31) around the lever shaft (31a). Rotate the adjustment arm (70) while holding it in position,
The amount of protrusion of the sensor wire (48) from the sensor link (38) is changed, and the reference posture of the center float (34) is changed according to the hardness of the paddy field to adjust its sensitivity, while When the ground pressure of the float (34) changes due to the change and the front part of the float (34) moves up and down, the switching valve (62) is appropriately operated via the sensor wire (48) and the switching cam (64). The planting section (15) is controlled to move up and down to maintain a constant planting depth.

Incidentally, (72) is a planting depth adjusting lever which is a planting depth adjusting element for setting a standard planting depth.

On the other hand, the lifting cylinder (28) is a body frame (3).
And the cylinder frame (28) main body side is supported by the inner frame (73) fixed to the rear vertical frame (67) in a front low rear height state via the shaft (74), and the piston rod (28a) of the cylinder (28).
The tip is directly connected to the left and right lift arms (76) (76) and the left and right lift rods (77) (77) via the pivot plate (28b) and the lift shaft (75). The vertical frame (67) The lower link (26) (26) through the shaft (78) (78)
The lower hitch pin (79) for connecting the support frame (24) and the lower links (26, 26) and the lift while swingably supporting the base ends of the lift arms (76) (76) respectively. Left and right lift rods (7
7) (77) is stretched, and when the piston rod (28a) is moved back and forth, the planting portion is provided via these lift arms (76) (76) and lift rods (77) (77) and link mechanism (27). (15) is configured to move up and down.

As shown in FIGS. 1 and 7 to 8, the planting depth adjusting lever (72) has a base end side integrally connected to the fulcrum shaft (42) through a lever frame (80), and The middle of the lever (72) is guided and supported by a lever guide plate (81) fixed to the left side portion of the central planted mission case (20a). A plurality of engaging notches (8) are formed on the rear surface of the guide hole (82) of the lever guide plate (81) through the rail bodies (83) (84).
5) is provided with a sub guide plate (86) slidably, and the lever (72) is fixed by engaging a locking plate (87) fixedly with the notch (85). (72)
Is configured to be fixed at an appropriately adjusted position.

Further, a deceleration implantation depth adjusting motor (88) for slidingly operating the sub guide plate (86) is provided on the guide plate (81) via a mounting member (81a), and an output shaft (88a) of the motor (88) is provided. )
The rotary screw shaft (89) integrally connected to the motor and the sub-guide plate (86) are connected to the combined body (92) which is supported by the hanging plate (90) and the holder (91). The lever (72) is configured to move integrally with the auxiliary guide plate (86) between the shallow limit switches (93) (94) provided below the guide plate (81) during forward and reverse driving.

In addition, the actuator (95
A potentiometer type correction amount sensor (95) for detecting the movement amount of the sub guide plate (86) by connecting a) is provided in the mounting member (81a), and a potentiometer for detecting the adjustment position of the lever (31). A shape sensitivity sensor (96) is provided on the lever shaft (31a). Further, as shown in FIG. 9, the sensor (95) (96), an automatic switch (97) and a limiter control switch (93) (94) input control connection circuit (98) for correcting the (88), the automatic lamp (99) for automatic mode display, the limit alarm lamp (100) and the buzzer (101) are connected to the control circuit (98) for output connection to detect the sensors (95) (96). The drive control of the motor (88) is performed based on the above.
The switches (97), lamps (99) (100), and buzzer (101) are arranged beside the driver's seat (13).

As is clear from the above, the center float (34) for flattening the field is connected by the sensor wire (48) to the switching cam (64) of the hydraulic switching valve (62) for controlling the elevation of the planting part (15), The sensor wire (48) is stretched through the sensitivity adjusting lever (31), and the sensitivity of the center float (34) is adjusted by operating the sensitivity adjusting lever (31).
A planting depth control device for a rice transplanter in which a planting depth adjusting lever (72) for adjusting the height of the center float (34) with respect to the body is detachably engaged with a guide plate (86). And a limit switch (93) (94) for detecting the moving end of the guide plate (86) by the plant depth adjustment motor (88). And a potentiometer-type sensitivity sensor (96) for detecting the displacement amount of the sensitivity adjustment lever (31) and a potentiometer-type correction amount sender (95) for detecting the displacement amount of the guide plate (86). 31) A controller (98) for automatically controlling the vegetation depth adjustment motor (88) by operation to keep the relative value of the sensitivity sensor (96) and the correction amount sensor (95) substantially constant. Sensitivity sensor ( 96) detected by
Moreover, the operation amount of the planting depth adjusting lever (72) by the planting depth adjusting motor (88) is detected by the correction amount sensor (95), and the planting depth adjusting motor (88) is set within the setting range of the limit switches (93) (94). ) Is automatically controlled, and the operation of the sensitivity adjusting lever (31) provided in the middle of the connection between the hydraulic switching valve (62) and the center float (34) for controlling the implantation depth and the implantation depth adjusting motor (88) are interlocked. It is configured to let.

This embodiment is configured as described above, and the tenth embodiment will be described below.
The operation will be described with reference to the flowchart in the figure.

Now turn on the automatic switch (97) to turn the automatic lamp (9
9) is turned on to enable automatic control for vegetation depth correction, the sensitivity adjusting lever (31) adjusts the hardness adjustment position (b) appropriately from the reference position (a) according to the hardness of the field soil. ) Is detected by the correction amount sensor (95), and when the reference value of sensitivity is adjusted to the insensitive side where the hardness is hard (ab> 0), it is set by the correction amount sensor (95). While the motor (88) is normally rotated by a predetermined correction amount to correct the reference planting depth to the shallow planting side, the sensitivity reference value is adjusted to the soft side (ab <0) sharpness side. At this time, the motor (88) is reversed by a predetermined correction amount to correct the reference planting depth to the planting side, and the sub guide plate (86) reaches the end of its movement during drive control of the motor (88). When the limit switch (93) or (94) detects that the alarm run is stopped. (100) and buzzer (10
It activates 1).

As described above, during the planting depth control in which the reference planting depth is set by the planting depth adjusting lever (72) and the reference planting depth is constantly maintained, the sensitivity is adjusted by the sensitivity adjusting lever (31). When adjusting to a harder or softer side than the standard, the standard planting depth is also automatically corrected, making it slightly deeper than the standard in a weak field and slightly shallower than the standard in a hard field. By planting, it is possible to perform a proper and good planting operation with a stable seedling planting posture.

"Effect of the invention" As is apparent from the above-mentioned embodiments, the present invention has a planting part (1
5) Switching cam (64) of hydraulic switching valve (62) that controls up and down
The center float (34) for flattening the field is connected to the sensor wire (48), and the sensor wire (48) is stretched via the sensitivity adjusting lever (31).
1) Adjust the vegetation depth detection sensitivity of the center float (34) by operation, and engage and disengage the vegetation depth adjustment lever (72) that adjusts the height of the center float (34) with respect to the aircraft to the guide plate (86). In the planting depth control device of the rice transplanter that is freely locked, the planting depth adjusting motor (88) and the planting depth adjusting motor (88) move the guide plate (86) in the same direction as the adjustment of the center float (34). Limit switches (93) (94) that detect the moving end of the guide plate (86), potentiometer-type sensitivity sensor (96) that detects the amount of displacement of the sensitivity adjustment lever (31), and the amount of displacement of the guide plate (86). A potentiometer type correction amount sensor (95) for detecting
Motor for vegetation depth adjustment (88) by operating the sensitivity adjustment lever (31)
Sensitivity sensor (96) and correction amount sensor (95)
Is provided with a controller (98) for keeping the relative value of the plant substantially constant, and the operation amount of the sensitivity adjusting lever (31) is detected by the sensitivity sensor (96), and the planting depth by the planting depth adjusting motor (88) is detected. The adjustment amount (9
5) and automatically control the planting depth adjustment motor (88) within the setting range of the limit switches (93) (94). Therefore, the sensitivity and the multiple floats (34) (35) for multi-row planting Since it is not necessary to connect the adjustment lever (31) to each of them, it is possible to simplify the structure of changing the implantation depth by the sensitivity adjustment lever (31) and reduce the operation force of the sensitivity adjustment lever (31), and at the same time, Since the operation of the sensitivity adjusting lever (31) provided in the middle of the connection between the hydraulic switching valve (62) and the center float (34) for controlling the plant depth and the plant depth adjusting motor (88) are linked, the center float (34) is different from the conventional one. It is possible to simplify the float (34) support structure by reducing the number of components to be connected to the), and most of the conventional machines that do not correct the vegetation depth with the setting of the vegetation depth detection sensitivity. Each of the above sensors without improvement 95) (96) and can be placed like easily motor (88), in which it is possible to easily achieve both improvement and manufacturing cost of Uefuka control functions.

[Brief description of drawings]

1 is a side view of the planting section, FIG. 2 is a side view of the whole,
FIG. 3 is a plan view of the same, FIG. 4 is a side view of a planting elevating part,
5 is an explanatory plan view of the float portion, FIG. 6 is an explanatory view of the planting depth control portion, FIG. 7 is an explanatory plan view of the planting depth adjusting lever portion, FIG. 8 is the same vertical sectional view, and FIG. FIG. 10 is a control circuit diagram, and FIG. 10 is a flowchart of the same. (15) …… Planting part (31) …… Sensitivity adjustment lever (34) …… Center float (float sensor) (48) …… Sensor wire (62) …… Hydraulic pressure switching valve (64) …… Switching cam ( 72) …… Planting depth adjustment lever (86) …… Guide plate (88) …… Planting depth adjustment motor (93) (94) …… Limit switch (95) …… Correction amount sensor (96) …… Sensitivity Sensor (98) …… Control circuit (controller)

Claims (1)

[Scope of utility model registration request] 1. A center float (34) for flattening a field is connected by a sensor wire (48) to a switching cam (64) of a hydraulic pressure switching valve (62) for controlling elevation of a planting part (15), and the sensor wire (48). (48) is stretched via the sensitivity adjusting lever (31), and the sensitivity of the center float (34) is detected by operating the sensitivity adjusting lever (31), and the height of the center float (34) against the aircraft is also adjusted. In the planting depth control device of the rice transplanter, which locks the planting depth adjusting lever (72) with the guide plate (86) in a detachable manner, in the same direction as the adjustment of the center float (34). ) Moving the planting depth adjusting motor (88) and a limit switch (93) for detecting the moving end of the guide plate (86) by the planting depth adjusting motor (88).
(94), a potentiometer-type sensitivity sensor (96) that detects the amount of displacement of the sensitivity adjustment lever (31), and a guide plate (86)
A potentiometer-type correction amount sensor (95) for detecting the amount of displacement of the plant is installed, and the sensitivity sensor (9) is automatically controlled by operating the sensitivity adjustment lever (31).
6) A planting depth control device for a rice transplanter, which is provided with a controller (98) for keeping the relative values of the correction amount sensor (95) and the correction amount sensor (95) substantially constant.