JPH0737458Y2 - Planting depth control device for passenger rice transplanters - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a planting depth control device for a riding rice transplanter.

(B) Conventional technology Conventionally, a riding rice transplanter connects a planting unit supported by a planting surface of a field with a float to the traveling unit so that seedlings can be planted while traveling in the field with the traveling unit. In addition, the vertical position adjustment mechanism of the float is provided to change the height from the planting surface of the planting part field supporting the planting claws to adjust the planting depth of the seedlings. Is configured.

Also, regardless of the unevenness of the planting surface in the field or the inclination of the machine body,
In order to support the planting part at a constant height from the planting surface and keep the planting depth of the seedling constant, a hydraulic lifting mechanism is provided between the running part and the planting part, A sensor interlocked with a hydraulic control valve that controls the hydraulic lifting mechanism is provided between the front end of the float and the planting part, and when the front end moves up and down, the height of the planting part is low and the seedlings are deep. As a (shallow) planting, the hydraulic lifting mechanism is operated to raise (lower) the planting part, and the planting part is supported at a certain height from the planting surface to achieve a seedling planting depth. Is kept constant.

However, in recent years, due to the improvement of the planting mechanism, the planting speed of seedlings has been improved, and therefore, it is becoming possible to increase the traveling speed during planting work to increase the efficiency of planting work. ,
Therefore, the following problems newly occurred.

That is, when the traveling speed at the time of planting work becomes high, the water overwhelmed in the field wraps around the front lower surface of the float, and the float is pushed up above the water so that the float always rises forward.

In this way, when the front end of the float moves upward, the hydraulic lifting mechanism operates, assuming that the seedlings have become deeply planted, and the planting part is planted on the planting surface even though the planting depth is maintained. The problem arises that the planting depth of seedlings becomes shallower.

Therefore, when the traveling speed changing operation detecting means detects that the traveling speed changing means is operated to the high speed side, the seedling planting depth adjusting means provided separately from the hydraulic lifting device is used to detect the traveling speed changing means. Along with the operation, the planting depth of seedlings is adjusted to the deep planting side to prevent shallow planting at high speed.

(C) Problems to be Solved by the Invention However, the riding rice transplanter is provided with a plurality of traveling speed changing means such as a throttle lever, a speed change lever, and an auxiliary speed change lever. The effects may cancel each other out.For example, even if the auxiliary shift lever, which is most used during planting work, is operated to the high speed side, if the throttle lever is operated to the low speed side, the traveling speed of the passenger rice transplanter becomes high. However, if only the operation of the sub-transmission lever to the high speed side is detected and the above-mentioned seedling planting depth is adjusted to the deep planting side, even if the traveling speed is not high, the planting of the seedlings is not performed. Since the planting depth is adjusted to the deep planting side, there is a drawback that the planting depth of the seedling becomes too deep as a result.

(D) Means for Solving the Problems In the present invention, a plurality of running speed changing means, a running speed changing operation detecting means, a seedling planting depth adjusting means, and a control device are provided, and the running speed changing means is provided. The operation of the means is detected by the traveling speed changing operation detection means, and the seedling planting depth adjusting means is operated via the control device based on the detection result, and the seedling planting depth is adjusted by the same means. In a planting depth control device configured to adjust, seedling planting depth adjusting means is provided in which a guide plate is vertically slidably mounted on a support substrate fixed to the planting section, and a plurality of seedling planting depth adjusting means are provided on the guide plate. Forming the lock groove of
The lock groove makes it possible to lock the elevating lever for adjusting the main float up and down, mounts a motor on the above-mentioned supporting board, and connects a screw rod to the motor via a gear case, and supports it by screwing the screw rod. The guide plate is configured to slide with respect to the board, and an up / down limit switch is attached to the supporting board, and the up / down sliding of the screw cylinder is regulated by contact with the contact piece fixed to the screw cylinder. Therefore, the traveling speed changing operation detecting means adjusts the planting depth of the seedlings to the deep planting side only when it is detected that at least two or more traveling speed changing means are operated to the high speed side. A planting depth control device for a riding rice transplanter is provided.

(E) Action / Effect According to the present invention, when the field is deeply flooded, if the changeover switch is turned ON, the speed change operation detection means can operate the travel speed change means such as the accelerator lever and the gear shift lever. Based on this detection result, the screw rod linked to the motor of the planting depth adjusting means is screwed to move the lock position of the lifting lever for vertically adjusting the main float up and down, By adjusting the planting depth of, even if the float floats due to high-speed running, the planting depth of the seedlings is adjusted to the deep-planting side. By adjusting the depth to the shallow planting side, it is possible to always maintain an appropriate planting depth, and it is possible to prevent shallow planting due to high-speed running and deep planting due to low-speed running. Turn off the selector switch to stop the above adjustment operation. Are allowed, it is possible to prevent the planting depth becomes too deep.

As described above, there is an effect that it is possible to always perform the planting work with an appropriate planting depth regardless of the depth of the field flood water by operating the changeover switch.

Moreover, since the planting depth adjustment operation is performed by vertically moving the lock position of the elevating lever by the screwing of the screw rod linked to the motor, the weight of the part to be raised and lowered for adjustment is small. Can be done sensitively and delicately.

It is possible to adjust the planting depth with a hydraulic mechanism that raises and lowers the entire planting part, but since it moves the heavy planting part up and down, the operation becomes insensitive and subtle. Difficult to make proper adjustments.

Further, since the elevating lever is locked by the plurality of lock grooves formed in the guide plate, it is possible to adjust the reference planting depth in a plurality of steps.

Further, since the vertical movement of the screw cylinder is regulated by the vertical limit switch attached to the support substrate, it is possible to prevent the planting depth from becoming too deep or too shallow.

(F) Embodiments An embodiment of the present invention will be described in detail with reference to the drawings. In FIG. 1 and FIG. 2, (A) is a riding rice transplanter, which is planted behind a traveling section (B) capable of self-propelling. Lifting mechanism (D) for attached part (C)
Are connected via.

The traveling section (B) mounts the prime mover section (2) on the upper surface of the front frame (1), connects the front section of the transmission (3) to the rear end of the front frame (1), and Left and right front axle cases (4) in front of (3)
The left and right front wheels (5) are arranged through the upper and lower frames (6) at the rear end of the transmission (3).
The front end of (7) is connected and the rear ends of the upper and lower frames (6) and (7) are connected by a vertical frame (8) to form a machine frame (9) having a substantially triangular shape in a side view. Left and right rear wheels (11) are arranged at the left and right rear lower ends of the frame (9) via left and right rear axle cases (10).

The lifting mechanism (D) pivotally attaches the front ends of the upper and lower link rods (11 ') (12) to the upper and lower parts of the vertical frame (8), and attaches the rear ends of the upper and lower link rods (11') (12). A parallel link mechanism is pivotally attached to the upper and lower parts of the planting frame (13) of the section (C), and the planting section (C) is moved up and down by expanding and contracting the hydraulic cylinder (14). .

The planting section (C) is a planting mechanism (17) in which seedlings on the seedling table (15) arranged above the planting frame (13) are provided at the rear end of the planting gear case (16). By the operation of, it is planted in the field.

The planting mechanism (17) pivotally supports the turning case (18) at the rear end of the planting gear case (16) and the planting claws (19) at both ends of the turning case (18). Thus, the planetary rotation of the two planting claws (19) enables high-speed planting operation.

Further, as shown in FIG. 3, the main float (20) is arranged at the center of the lower part of the planting section (C), and the side floats (21) are arranged on the left and right sides, respectively. As shown in FIG. 3, (21) has a horizontal shaft (22) rotatably mounted horizontally on the lower surface of the planted gear case (16), and the horizontal shaft (22) has a lower end of the lifting lever (24). The lifting lever (24) extends diagonally forward and upward.

In addition, a set of two support levers (23a) (23b) (23c) is extended obliquely rearward and downward from the horizontal axis (22), and each support lever (2
3a) (23b) (23c) at the rear end, main float (20)
A pivoting part (20a) standing on the upper surface of the rear end of the rear end and a side pivoting part (21a) standing on the center part of the side float (21) are pivotally mounted on the pivoting part (21a). The main float (20) and the side float (21) are moved up and down by tilting of (24).

Further, as shown in FIG. 4, the middle part of the lifting lever (24) is inserted through the guide hole (26) of the guide plate (25), and the guide plate (25) is attached to the planted gear case (16). The pressing plate (2) fixed to the supporting substrate (27) fixed to the side surface
It is mounted so that it can slide up and down via the 8), and a plurality of lock grooves (29) are formed on one side of the guide hole (26), and the lock groove (29) is located in the middle of the lifting lever (24). The fixed tongue piece (30) is inserted to fix the vertical movement of the main float (20) connected to the elevating lever (24).

In particular, the pivot points (20a) (21a) of each float (20) (21)
Is provided almost vertically above the plunging position of the planting claw (19) into the planting mud surface, so that even if each float (20) (21) tilts, each pivoting part (20a) (21a) The height does not change, so that the variation of the planting depth due to the tilting of each float (20) (21) is prevented.

Further, an adjusting mechanism (31) is provided between the guide plate (25) and the supporting substrate (27) as a seedling planting depth adjusting means (Z) as shown in FIGS. The adjusting mechanism (31) includes a motor (32) fixedly mounted on the support substrate (27).
The gear rod (34) is interlocked with the screw rod (34) mounted in parallel with the sliding direction of the guide plate (25) via the gear case (33), and the guide plate (25) and the connecting piece (35) are connected to the screw rod (34). By screwing the screw cylinder (36) connected to the main float (20) by rotating the motor (32), the guide plate (25) with the lifting lever (24) locked is slid. I am trying to adjust up and down.

In the figure, (37) and (38) are upper and lower limit switches, and when the contact pieces (39) fixed to the screw cylinder (36) come into contact with the switches (37) and (38), the electric circuit is cut off. Motor (3
The operation of 2) is stopped.

The operation of the hydraulic cylinder (14) of the lifting mechanism (D)
It is controlled by a hydraulic control valve (69) shown in FIG. 7, and the control valve (69) is controlled by a sensor (S) that detects vertical movement of the main float (20).

That is, the sensor (S) is the main float (20).
The pivotal support (20b) is provided on the upper surface of the front part of the
Pivotally attach the lower end of the sliding rod (71) with the long hole (70)
In the same long hole (70), the front extension (16) of the planted gear case (16)
Insert the guide pin (72) protruding from a) so that it can move freely,
The spool (7) of the hydraulic control valve (69) is attached to the upper end of the sliding rod (71).
3), the outer of the wire (74) connected to the guide pin (72) is connected to the inner (75) of the wire (74), and the main float (20) moves up and down. The expansion and contraction are transmitted to the spool (73) of the hydraulic control valve (69) to operate the hydraulic cylinder (14).

The hydraulic control valve (69) is a five-position control valve, which blocks the hydraulic cylinder (14) side at the central neutral position (76) and hydraulically operates the choke (78) at the left side position (77). The pump (P) and the hydraulic cylinder (14) are connected, and the left side position (79) directly connects the hydraulic pump (P) and the hydraulic cylinder (14) to the right side position (80) of the neutral position (76). ) Connects the hydraulic cylinder (14) and the reservoir (82) with a choke (81) interposed, and further connects the hydraulic cylinder (14) and the reservoir (82) directly at the right outer position (83). There is.

Therefore, the position of the planting part (C) is low and the wire (74)
When the hydraulic control valve (69) side of the inner (75) is pulled in, the spool (73) is moved to the left to contract the hydraulic cylinder (14) to raise the planting section (C) and reverse. The position of the planting part (C) is high and the inner part of the wire (74) (7
When the hydraulic control valve (69) side of 5) is pulled out, the spool (73) is moved to the right to extend the hydraulic cylinder (14) and lower the planting part (C) to lower the planting part. (C) is supported at a constant height to keep the planting depth of seedlings constant.

The central neutral position (76) blocks the hydraulic cylinder (14) side, while the left side position blocks the choke (7).
8) with hydraulic pump (P) and hydraulic cylinder (1
4), the hydraulic pump (P) and the hydraulic cylinder (14) are directly connected at the left outer position (79), and the choke (8) is provided at the right position (80) of the neutral position (76).
1) with hydraulic cylinder (14) and reservoir (8
2) and the hydraulic cylinder (14) and the reservoir (82) are directly connected at the right outside position, so that the planting part (C) and the main float (20) that are suitable for the optimal planting depth are connected. ) And the absolute value of the deviation from the set value of the difference is small, the planting section (C) is moved up and down at a low speed, and when the absolute value of the deviation is large, the planting section (C) is By moving up and down at high speed, stepwise proportional operation is performed.

Further, in order to operate the riding rice transplanter (A), as a first traveling speed changing means (X1) on the left side surface of the motor part (2) in front of the operating part (E) as shown in FIG. A speed change lever (40) is provided, and the sub speed change lever (40) is used to change the traveling speed during the planting work.

In addition, as shown in FIG. 9 on the right side of the motor part (2),
A throttle lever (41) serving as a second traveling speed changing means (X2) is provided, and the throttle lever (41) is used for the seat (4
When operated to the 7) side, the engine will rotate at high speed.

In the figure, (42) is the main shift lever, (43) is the hydraulic lift lever, (44) and (45) are the brake and clutch pedals,
(46) is a handle.

Also, the lever guides (48) for the auxiliary shift lever (40) and the throttle lever (41) provided on the left and right side surfaces of the prime mover (2).
a) (48b), as shown in FIG.
The operation detection switches (49a) and (49b) as the traveling speed change operation detection means (Y) connected to the vehicle are provided, and each operation detection switch (49a) and (49b) is a set of two switches. When the levers (40) and (41) are operated to the high speed side, one circuit is closed and the other circuit is opened when the levers (40) and (41) come into contact with each other.

Further, as shown in FIGS. 1 and 2, a changeover switch (50) is provided on the left side of the seat (47).

The control device (F) includes the two operation detection switches (49a) (49b), the changeover switch (50), the relays (51) (52) and the upper and lower limit switches (37) connected in series.
(38).

Particularly, since the two operation detection switches (49a) (49b) are connected in series, both operation detection switches (49a, 49b) are connected.
If the a) and (49b) are not switched at the same time, there will be no electrical connection. Therefore, only when the sub speed change lever (40) and throttle lever (41) are operated to the high speed side, the adjustment to increase the planting depth is made. The operation is performed, and other than that, the adjustment operation in the direction of deepening the planting depth is not performed.

Then, when the contact piece (39) of the guide plate (25) contacts the lower limit switch (38), the circuit is opened and the rotation of the motor (32) is stopped.

Further, only when the sub-shift lever (40) and the throttle lever (41) are operated to the low speed side, the adjustment operation in the direction of making the planting depth shallow is performed, and otherwise the planting depth is made shallow. No direction adjustment action is performed.

Then, when the contact piece (39) of the guide plate (25) contacts the upper limit switch (37), the circuit opens and the rotation of the motor (32) stops.

In the figure, (53) is a pilot lamp, (54) is a main switch, (55) is a power supply, and (56) and (56) are surging prevention diodes.

The embodiment of the present invention is configured as described above, and the lifting lever (24) is attached to the guide plate (25) during the planting work.
Engage with the required lock groove (29) of the
If (0) is turned on, both operation detection switches (49a) (49b) will be switched when the auxiliary transmission lever (40) and throttle lever (41) are operated to the high speed side, and the relay (52)
To rotate the motor (32), slide the guide plate (25) downward, and move the main float (20) upward to adjust the depth of planting to a higher speed. It is possible to prevent shallow vegetation due to floating of the main float (20) due to.

And the auxiliary shift lever (40) and throttle lever (41)
When and are operated to the low speed side, both operation detection switches (49a) and (49b) are switched, the relay (51) is excited and the motor (32) is rotated in the direction opposite to the previous time, and the guide plate Slide (25) upward and move main float (20) downward to adjust the planting depth so that the planting depth becomes shallower. Restored to the planting depth.

Further, when one of the sub speed change lever (40) and the throttle lever (41) is operated to the high speed side and the other is operated to the low speed side, the above-described planting depth adjustment operation is not performed.

As described above, by adjusting the planting depth to the deep planting side only when both the sub-transmission lever (40) and the throttle lever (41) are operated to the high speed side, a plurality of traveling speed changing means can be operated. When the actual traveling speed is not high due to the offsetting of the action, the planting depth can be prevented from being adjusted to the deep planting side, and the planting work with an appropriate planting depth can be performed.

In addition to the above, the traveling speed changing means has a main speed change lever (42). Therefore, in order to combine two traveling speed changing means, the auxiliary speed change lever (40) and the main speed change lever (42) are used. ), Main shift lever (42) and throttle lever (41)
There is a combination with, and the present invention can be applied to these combinations.

The dynamic buoyancy of the water acting on the float depends on the water depth of the overhanging water, and is large when the water depth is deep and small when the water depth is shallow. Although it is good, when the water depth is shallow, there is a drawback that the planting depth of the seedlings is too deep because the floats are adjusted to the deep planting side even if the floating amount is small. When the water is shallow, by turning off the changeover switch, it is possible to stop the above adjusting operation and prevent the planting depth from becoming too deep.

[Brief description of drawings]

FIG. 1 is an overall side view of a riding rice transplanter having a planting depth control device according to the present consideration. FIG. 2 is a plan view of the same. FIG. 3 is a perspective view showing a connecting state of the elevating lever and the main float and the side float. FIG. 4 is a side view of the seedling planting depth adjusting means. FIG. 5 is a front view of the same. FIG. 6 is a sectional view taken along line I-I of FIG. 5. FIG. 7 is a hydraulic circuit diagram for controlling the lifting mechanism. FIG. 8 and FIG. 9 are side views of the traveling speed changing means and the traveling speed changing operation detecting means. FIG. 10 is a circuit diagram of the control device. (A): Passenger rice transplanter (C): Planting section (F): Controller (X1) (X1): Travel speed changing means (Y): Travel speed changing operation detecting means (Z): Planting depth of seedlings Adjusting means (20): Main float (25): Guide plate (24): Lift lever (27): Support substrate (29): Lock groove (32): Motor (33): Gear case (34): Screw rod (37) ) (38): Vertical limit switch (39): Contact piece

Claims (1)

[Scope of utility model registration request] 1. A plurality of traveling speed changing means (X1) (X2),
It comprises a traveling speed changing operation detecting means (Y), a seedling planting depth adjusting means (Z) and a control device (F), and the operation of the traveling speed changing means (X1) (X2) is carried out. The change operation detecting means (Y) detects, and based on the detection result, the planting depth adjusting means (Z) of the seedlings is operated via the control device (F). In a planting depth control device (F) configured to adjust the planting depth, a seedling planting depth adjusting means (Z) is fixed to a planting section (C). ), A guide plate (25) is slidably mounted vertically, and a plurality of lock grooves (29) are formed in the guide plate (25), and the main float (20) is vertically adjusted by the lock groove (29). The lifting lever (24) for locking the motor (32) can be locked, and the motor (32) is attached to the support board (27). Case (33)
The screw rod (34) is interlockingly connected via the guide plate (25) with respect to the support substrate (27) by the screw movement of the screw rod (34).
Is configured to slide up and down, and further, upper and lower limit switches (37) and (38) are attached to the support substrate (27), and by contact with the contact piece (39) fixed to the screw cylinder (36), The traveling speed is configured to regulate the vertical sliding of the screw cylinder (36), and only when it is detected that at least two or more traveling speed changing means (X1) (X2) are operated to the high speed side. A planting depth control device for a riding rice transplanter, characterized in that the changing operation detecting means (Y) adjusts the planting depth of the seedlings to the deep planting side.