JP2522967Y2 - Rice transplanter horizontal controller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a horizontal control device for a rice transplanter which always keeps a planting portion horizontal during a planting operation to maintain a constant planting depth.

"Conventional technology" The left and right rolling restriction springs are stretched between the machine and the left and right sides of the planting section, and when the machine is inclined during work, the left and right rolling restriction springs are imbalanced and planted. In the conventional horizontal control for maintaining the horizontal level of the section, during non-planting work, the control is stopped in a state where the mutual positional relationship between the machine side and the planting section maintains the relationship immediately before the stop of the work. .

"Problems to be solved by the invention" When the planted part is raised in such a control stopped state, the planted part returns to the center so that it is parallel to the machine by a rolling lock etc. However, there is a drawback that excessive force is applied to the rolling regulating spring and the spring mounting portion to cause deformation and breakage, thereby hindering horizontal control at the next planting operation.

[Means for Solving the Problems] However, the present invention is based on the present invention, in which the planting portion is supported on the machine side via a rolling fulcrum shaft so as to be able to swing left and right and reciprocated right and left by an actuator. A horizontal control device for a rice transplanter that connects left and right rolling regulating springs between left and right sides of an adjusting member and a planting portion, and performs horizontal control of the planting portion by moving the rolling adjusting member left and right. A return sensor for switching a return switch by a return operation, and a mode switch for starting a center return operation of the actuator are provided. When the mode switch is operated, the return sensor is actuated by a rolling adjustment member to switch the return switch and to perform left and right rolling. It is characterized in that the regulating spring pressure is returned and maintained substantially uniformly.

"Operation" Therefore, during non-planting work, such as when the planted part is raised, the right and left rolling control spring pressures are made substantially equal to achieve a good center return of the planted part. To prevent deformation and breakage of the rolling control spring and its mounting part, etc., to improve durability and maintain long-term stable planting accuracy. It can be easily achieved.

Embodiment An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a horizontal control circuit diagram, FIG. 2 is a side view of a riding rice transplanter,
FIG. 3 is a plan view of the vehicle, in which (1) is a traveling vehicle on which an operator rides, and a body frame (3) on which an engine (2) is mounted is connected to a transmission case (4) at a rear end. Let
Front paddle traveling front wheels (6) are supported on both front sides of the transmission case (4) via front axle cases (5), and paddy field traveling is provided on both rear sides of the transmission case (4) via rear axle cases (7). Rear wheel (8)
To support. Spare seedling mounts (10) are appropriately mounted on both sides of the hood (9) covering the engine (2), and the axle cases (5) and (7) are provided by a body cover (12) forming a step (11). A driver's seat (13) is mounted above the vehicle body cover (12), and a steering handle (14) is provided in front of the driver's seat (13) and behind the hood (9).

Further, (15) in the figure is a planting section having a seedling mounting table (16) for multiple planting and a plurality of planting claws (17).
The back-tilt type seedling table (16) is supported by the planting case (20) via the guide rail (18) and the guide rail (19) so as to be reciprocally slidable left and right. A rotary case (21) that rotates at a constant speed is supported by the planting case (20), and a pair of claw cases (22) and (22) are disposed at symmetrical positions about the rotation axis of the case (21). Attach the planting nails (17) and (17) to the tip of the nail case (22). 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) connected to the rear side of the traveling vehicle (1) via the link mechanism (27), and a lifting cylinder (28) for lifting and lowering the planting portion (15) via the link mechanism (27); ) (8) is driven and moved at a substantially constant speed, and at the same time, two seedling claws (17) (17) (17) (17) (17) are rotated from the seedling mounting table (16), which reciprocates right and left, from one rotation of the rotary case (21). ) To remove two seedlings,
It is configured to perform seedling planting work continuously.

In the figure, (29) is a traveling speed change lever, (30) is a planting operation lever, (31) is a planting sensitivity adjustment lever, (32) is a traveling clutch pedal, and (33) and (33) are left and right brake pedals. .

As shown in FIG. 4, a center float (34) is provided at the lower center of the planting portion (15), and side floats (35) (35) are provided on both left and right sides of the planting portion (15). 34) The rear side is supported by a planting depth adjusting link (36) and the front side is supported by a sensor link (36) and a front side bracket (38).
A pitching fulcrum shaft (39) for swingably supporting the front of the float (34) is provided on the bracket (40) on the rear upper surface of the float (34). Thus, the planting depth is controlled to be constant.

5 to 7, a central vertical frame (41) integrally connected to the upper end of the support frame (24),
Seedling support (42) (4)
2) The left and right rolling control springs (43) and (43) are interposed between them. A horizontal feed screw shaft (45) is installed inside the upper fixed box (44) of the vertical frame (41), and Shaft (45)
A spring pressure adjusting plate (49) is attached via a fixing plate (48) to a moving body (47), which is a rolling adjusting member coupled to a screw shaft (45), while a rolling motor (46) is interlocked and connected to the screw shaft (45). The regulating spring (43) is stretched between the adjusting plate (49) and the upper mounting bracket (50) of the support (42) via a spring mounting plate (51) so that the spring pressure can be adjusted. While the rolling generated by the left and right lateral feed of (16) is regulated, the rolling motor (46) is driven forward / reverse when the planting portion (15) is tilted left and right, and the left and right regulating springs (43) (43)
The planting section (15) is configured to be kept horizontal by controlling the spring force of the plant to an unbalanced state.

Left and right limit switches (53) and (54) are provided at both left and right ends of the box (44) through left and right switch stands (52) and (52) to detect the left and right end of movement of the moving body (47). A single center return switch (55), which is a regulating spring position switch for detecting the center return of the moving body (47), is provided via a mount (56) at substantially the center of the box (44) on the left and right sides. The return switch (55) is operated by a cam plate (57) serving as a spring return member, and has a U-shaped engagement groove (58) to be engaged with the base end of the L-shaped fixed plate (48). A cam body (57) is provided. The cam (57) is pivotally supported by the mounting base (56) via a swing fulcrum shaft (59), and the mounting base (56) and the cam body are A fulcrum spring (60) is stretched between (57) and the moving body (47) is screwed on the screw shaft (4).
5) When returning to the approximate center position on the left and right of
The cam body (57), which engages with the engagement groove (58) in 8), is rotated against the spring (60) to exceed the fulcrum, and the bent piece (57a) on one end side of the cam body (57) is moved. The switch (55) is configured to be brought into contact with or released from the actuator (55a) so that the switch (55) is turned on or off from the on or off continuous state. By detecting the switching from on to off or from off to on, the return of the moving body (47) to the center is detected.

In addition, (61) is a rolling-regulating auxiliary spring stretched between the left and right sides of the box (44) and the seedling mounting table (16).
Reference numeral 2) denotes a rolling detection horizontal sensor provided at an upper central position of the planting case (20).

Further, as shown in FIG. 8, a lateral feed transmission mechanism (64) is attached to a planting drive case (63) in which a central planting case (20) is fixed.
The speed change mechanism (64) is fitted with an input shaft (65) in a freely rotatable manner and fixed to a transverse feed shaft (66) of a seedling mounting table (16). Each of the three transmission gears (68) constantly meshing with the gear (67) is slid through a leaf spring (69) in an axial keyway (65a) formed in the input shaft (65). A single switching key (70), which is selectively engaged with any one of the gears (67), and is slidably fitted to the input shaft (65) and integrally connected to the key (70); Switching sleeve (7
1) a left and right slidable shifter shaft (74) connected to the sleeve (71) via a shifter fork (72) and having a locking ball groove (73) for holding a shift position on one side; (74), a transverse feed lever (77) engaged and connected via a shift arm (75) and a lever shaft (76), and a locking ball (7) in the ball groove (73).
And a regulating shaft (79) for engaging and holding the shifter shaft (74) to fix the position of the shifter shaft (74).
The locking ball engaging groove (80) formed in the ball (87) is opposed to the regulating spring (81) interposed between the drive case (63) and the case (63) outer head (79a) of the shaft (79). When the ball is moved to the position, the restriction on the shifter shaft (74) by the ball (78) is released, and the shift at the shift switching position by the shift lever (77) is performed.

On the other hand, a left-right reciprocating feed screw groove (82) is formed on the outer side of the drive case (63) of the lateral feed shaft (65), and is fixed to the seedling mounting table (16) via a bracket (83). The hull-shaped key (85) of the lateral feeder (84) is coupled to the screw groove (82), and the seedling mounting table (16) is configured to reciprocate left and right by rotation of the screw shaft (82). I have.

The lateral feeder (84) is provided with a releasable release plate (88) which is detachable via a mounting bracket (86) and a bolt (87), and the seedling mounting table (16) moves to the left. Only when reaching the end, the left end of the release plate (88) is brought into contact with the head (79a) of the regulating shaft (79) and the shaft (79) is
The ball (78) can be engaged with the engagement groove (80) by retreating into the drive case (63) against 1) to release the regulation of the shaft (74) by the ball (78). And a shift of the horizontal feed speed synchronized with the vertical feed by the vertical feed shaft (89) is made possible. Lateral feed shaft (66)
Are provided with moving end left and right switches (90) and (91) for detecting the left and right moving end of the seedling mounting table (16). 90) (9
When the contact is brought into contact with the actuator of 1) and the contact is switched from off to on, the end of the right and left movement of the seedling mounting table (16) is detected.

Further, as shown in FIG. 9, the planting operation lever (30)
When the planting unit (15) is positioned between the "down" position and the "neutral" position for lowering the planting unit (15), the horizontal control mode for controlling the planting unit (15) horizontally and the seedling mounting table (16) A control mode switch (92) for appropriately switching between a center return mode in which the planting portion (15) is returned to substantially the center in the left and right directions is provided so as to be operated, and the operation lever (30) is moved to the aforementioned "down" position or the planting position. When switching to the low speed and high speed planting states with the on clutch on, the switch (92) is turned on by the switch operation plate (93) integrally connected to the lever (30) between the "down" position and the "neutral" position. When switching the lever (30) to the "neutral" position or the "up" position for raising the planting section (15) while switching to the horizontal control mode, the position between the "down" position and the "neutral" position is changed. The switch (92) is turned off at the time and the mode is switched to the center return mode. It is those that you have configured.

Then, as shown in FIG.
6) is provided with a horizontal control circuit (95) for controlling the drive via a relay circuit (94). The control mode switch (92), the moving end left and right switches (90) and (91), A reference slope setting device (96) for setting a target voltage which is a reference target value in the above, a horizontal sensor (52), a dead band switch (97) for appropriately changing a dead band width of the target voltage, and a center return switch (55). ) Is input to the control circuit (95) to control the driving of the rolling motor (46).

In addition, the limit switches (53) and (54) are interposed between the relay circuit (94) and the horizontal control circuit (95), and a horizontal automatic and a manual contact (98b) having an automatic contact (98a) and a manual contact (98b) are provided. The horizontal control circuit (95) includes a changeover switch (98) for manual control, and the limit switch (53) (54)
By connecting the manual contact (98b) of the changeover switch (98) via the manual switch (99) to the motor (46) without interfering with the automatic operation, even if the connection circuit (95) fails. ) Can be operated manually.

Further, the inclination setting device (96) is provided with a shipping adjustment volume (96a) for performing horizontal adjustment at the time of shipment from a factory and a work operation volume (96b) operated by an operator in a parallel circuit. Residual resistance (100a) on (96a)
(100b) to hold these two volumes (96a)
(96b), the resistance value becomes zero and a large current flows through the setter (96), so that the setter (96) is prevented from burning or the control circuit (95) is damaged. It is composed.

In this embodiment, the configuration is as described above, and the following
This operation will be described with reference to the flowcharts of FIGS. 10 to 13 and the timing charts of FIGS. 14 to 16.

As shown in FIG. 10, a target set voltage value (Va) based on the slope setting device (96) is input to the control circuit (95), the automatic switch (98) is automatically operated, and the control mode switch (92) is operated. When the mode switch (92) is off, the automatic level control is immediately interrupted when the mode switch (92) is off, and the mode is switched to the center return mode to switch the moving body (47) to the center. The center return control of the planting section (15) in which the left and right regulating springs (43) and (43) are returned to the center is performed, and is turned on at the beginning of the mode switching by the on / off operation of the mode switch (92). to t ₁ seconds elapses after, also is Setsu換Ru those to each mode after lapse of t ₂ seconds off.

As shown in FIG. 11, the aforementioned set voltage value (V _a ) is obtained from the set volume voltage value (V ₁ ) of the setter (96), and the target voltage value (V _c ) is V _c = aV ₁ + b (a, b
Is calculated from the relational expression of the constant.) During control, this value (V _c ) is set by adding a correction of a constant value (V _o ) to cancel the effect of the movement of the seedling mounting table (16). Voltage value (V _a )
When the seedling mounting table (16) reaches the end of the left and right movement, the left or right switch (90) (91) is turned on from off and changes its moving direction, and then changes the moving direction from on to off again. fixed value the target voltage value V _c after a certain delay time by adding the correction of _{(V o), V a =} V c + V o for each switched off left switch (90) from on right switch (91) V _a = V _c -V _o, other V _a = a V _c, the set voltage value (V _a) horizontal sensor (52 target these values (V _a) set to but each switched from oN to oFF ) Is performed based on the detected value (V ₂ ).

In the horizontal control mode during the planting operation, the motor (46) is controlled so that the detection value (V ₂ ) of the horizontal sensor (52) is maintained within the dead band value (V _b ) range of the set voltage value (V _a ). ) Is performed, and when V ₂ <V _a −V _b , the planting portion (1
Right up control of 5), the planting unit when V _a + V _b <V ₂ is left up control (15) is performed. Also when the left or right switch in these upper left down or Migiage control in (90) (91) is off again turned on from off, to the on-operation time and the on-lapse t ₃ seconds turned off from For a certain time (t ₄ ) until the above, the left raising or right raising control is temporarily stopped.

On the other hand, in the center return mode in which the planting section (15) is raised, immediately after switching to the return mode, the moving body (47) is moved to the left when the return switch (55) is off. Control of raising the planting part (15) to the right, and when on, the moving body (47) is moved rightward to control the raising of the planting part (15) to the left. When the return switch (55) that returns to the center position of the feed screw shaft (45) switches from off to on or from on to off, the right-up or left-up control is stopped and the left and right regulating springs (43) and (43) It is intended to return to the center while maintaining the spring force in balance. The center return operation as described above is performed even when the mode is switched from manual to automatic at the time of such planting rise.

As is apparent from the above description, the planting unit (15) is supported on the machine side via a rolling fulcrum shaft (23) so as to be able to swing left and right, and is reciprocated right and left by a rolling motor (46) as an actuator. The left and right rolling restriction springs (43) are connected between the left and right sides of the moving body (47), which is a rolling adjustment member on the machine side, and the planting section (15), and the planting section is moved by the left and right movement of the moving body (47). (15) In the rice transplanter horizontal control device for performing horizontal control, a cam body (57) serving as a return sensor for switching a central return switch (55) by a central return operation of the moving body (47), and a rolling motor (46). ), A control mode switch (92) for starting the center return operation is provided, and when the mode switch (92) is operated, the cam body (57) is actuated by the moving body (47) to activate the center return switch (55). Switch to left The right rolling regulating spring (43) is configured to return and maintain the pressure substantially uniformly.

Thus, in the case of this configuration, when a constant value (V _o ) is corrected for the lateral movement of the seedling mounting table (16), the left and right switches (90) and (91) are turned on from off and on again. Since the correction is performed after being turned off, the correction in the moving direction is performed in the ascending posture only when the moving direction is changed and the net posture becomes slightly lower in the moving direction slightly later. The inclination of the planting portion (15) due to the movement is prevented.
Also, during horizontal control and when changing the left-right movement direction of the seedling mounting table (16), the left-right switch (90) (9
When 1) is turned on from off and back on again, control is interrupted for this ON operation time and for a fixed time (t ₄ ) from the on to off until t ₃ seconds elapse, that is, the control is being performed. When the left switch (90) or the right switch (91) is turned off → on → off, t ₃ between on and off and after off.
Since the left raising or right raising control is interrupted, overcorrection or the like due to a time delay of the correction operation can be prevented, and control accuracy can be further improved.

Furthermore, when the planting rises during the non-planting operation, the planting part (15) in which the left and right regulating springs (43) and (43) are balanced is always returned to the center, so that the planting is forcibly performed. Attachment (1
There is no interference with the rolling lock, etc., which returns 5) parallel to the machine side, and therefore the regulating springs (43) and (43)
The plates (49) and (51) serving as spring mounting members can also be prevented from being damaged or deformed, so that their durability can be improved, and the accuracy of horizontal control can be stably maintained over a long period of time.

Further, the cam body (57) has a U-shaped engagement groove (58) with the fixed plate (48) to widen the range of engagement with the fixed plate (48) to ensure operation. And a single return switch (55)
It is also possible to accurately detect the left and right position and the center position of the moving body (47) on the screw shaft (45), and it is possible to reliably return the planted portion (15) to the center by extremely simple means. it can.

The tilt setting device (96) has a volume (96a) for factory adjustment and a volume (96) for work operation during normal work.
b) is provided in parallel so that fine adjustment at the time of shipment and adjustment at the time of work operation can be easily performed without operating a controller or the like, and the adjustment range may be relatively narrow. Residual resistance (100
a) By holding (100b), the setting device (9
Accidents such as burnout of the setter (96) and damage to the controller due to a large current flowing in 6) can be prevented.

[Effects of the Invention] As is apparent from the above-described embodiment, the present invention is characterized in that the planting section (1
5) and a left and right rolling regulating spring (43) between the left and right sides of the planting part (15) and the rolling adjustment member (47) on the machine side which is reciprocated right and left by a rolling motor (46) as an actuator. ) Is connected, and the horizontal control of the planting section (15) is performed by the horizontal movement of the rolling adjusting member (47). A return sensor (57) for switching between 55 and a mode switch (92) for starting the center return operation of the actuator (46) are provided. When the mode switch (92) is operated, the return sensor is activated by a rolling adjustment member (47). (57) is actuated to switch the return switch (55) so that the left and right rolling regulation springs (43) and (43) return and maintain the pressure almost equally. When planting platform rises during such work with non-planting (15), left and right rolling regulating spring (4
3) (43) Rolling lock that forcibly returns the planted part (15) parallel to the machine side by forcibly returning the planted part (15) to the center by making the pressure almost uniform and achieving good centering of the planted part (15). Without interference, the deformation and breakage of the rolling restricting spring (43) and the mounting member are prevented, the durability is improved, and the long-term stability of planting accuracy can be easily maintained.

[Brief description of the drawings]

FIG. 1 is a horizontal control circuit diagram, FIG. 2 is an overall side view of the rice transplanter, FIG. 3 is a plan view of the same, FIG.
FIG. 5 is a back view of the horizontal control unit, FIG. 6 is a view of the center return detecting unit, FIG. 7 is a side view of the horizontal control unit, and FIG.
FIG. 9 is an explanatory view of the lateral feed portion of the seedling mounting table, FIG. 9 is an explanatory view of the planting operation lever, FIGS. 10 to 13 are flowcharts, FIG.
Figures to 16 are timing charts. (15) ... planting part (23) ... fulcrum shaft (43) ... regulating spring (47) ... moving body (rolling adjustment member) (57) ... cam body (spring return member)

Claims (1)

(57) [Scope of request for utility model registration] 1. A rolling adjustment member on the machine side which supports a planting portion (15) swingably to the left and right through a rolling fulcrum shaft (38) on the machine side and reciprocates left and right by an actuator (46). The right and left rolling regulating springs (43) are connected between the left and right sides of the planting section (15) and the planting section (15), and the horizontal control of the planting section (15) is performed by the horizontal movement of the rolling adjustment member (47). In the horizontal control device of the machine, a return sensor (57) for switching a return switch (55) by the central return operation of the rolling adjustment member (47) and a mode switch (92) for starting the central return operation of the actuator (46). When the mode switch (92) is operated, the return sensor (57) is actuated by the rolling adjustment member (47) to switch the return switch (55) to switch the left and right rolling regulating springs (43) (43). Horizontal controller of rice transplanter, characterized by being configured so as to substantially uniformly return maintain pressure.