JP5087892B2 - Seedling transplanter - Google Patents

Description

The present invention relates to a seedling transplanter .

  Conventionally, this type of seedling transplanter has been configured so that when the traveling vehicle body is switched to reverse, the transplanter connected to the vehicle body automatically rises to the height of the non-working position. Such a lifting / lowering control device for the work machine part accompanying the reverse switching of the traveling vehicle body is necessary to prevent the work machine from colliding with a kite or other obstacles during the reverse drive and to safely travel in the reverse direction.

The seedling transplanter is configured to be lifted by the elevation control and to stop the transmission and stop the seedling transplanter. For example, Japanese Patent No. 3092465 discloses a technical configuration provided with a reverse reverse automatic raising mechanism that raises the work implement portion to a non-working position when the traveling vehicle body is operated backward.
Japanese Patent No. 3092465

Conventionally, when the traveling vehicle is stopped by applying braking force to the four wheels, there is a problem that the transplanter cannot be raised even if the hydraulic lifting lever is raised.

The invention according to claim 1 is provided with a traveling vehicle body (3) including left and right front wheels (12), left and right rear wheels (13), and a steering handle (17), and the traveling vehicle body (3) is provided with a transplanter (5). In the connected seedling transplanter, the transplanter (5) is automatically raised by connecting the hydraulic lift lever (68) via the pitman arm (56) operated by steering the steering handle (17). The seedling planting tool (1) of the machine (5) is transmitted through the fixed position stop clutch (2), and when the transmission is cut off by the clutch (2), the seedling planting tool (1) stops at a fixed position. 3) is equipped with a forward / reverse switching device (4) for forward travel and reverse travel, wherein the forward / reverse switching device (4) is configured to be transmitted from the engine (18), and from the engine (18) to the belt tension clutch. Via (66) A hydraulic pump (64) to be transmitted is provided, and when the brake pedal (65) is depressed, the forward / reverse switching device (4) is switched to neutral to brake the left and right front wheels (12) and the left and right rear wheels (13). The transmission is cut off by the main tension (67) of the belt tension clutch (66) to stop the hydraulic pump (64), and the belt tension clutch (66) is interlocked with the operation of raising the hydraulic lift lever (68). The seedling transplanting machine is characterized in that the hydraulic pump (64) is driven by the auxiliary tension (69) to raise the transplanting machine (5) .

According to the second aspect of the present invention, when the steering handle (17) is steered, the hydraulic lift lever is transmitted through a hydraulic damper, an air damper, or a lining with a stopper provided between the pitman arm and the hydraulic lift lever (68). The seedling transplanting machine according to claim 1, wherein the transplanting machine (5) is automatically lifted by interlocking (68).

According to the first aspect of the present invention, even if the traveling vehicle body 3 is stopped by applying sexual power to the four wheels, the transplanter 5 can be raised by raising the hydraulic lift lever 68.
According to the invention of claim 2, in addition to the effect of the invention of claim 1, the transplanter 5 can be prevented from automatically rising when the course is changed in a deformed field or the like. When turning, the transplanter 5 can be raised accurately.

  First, in the case of the embodiment, the invention according to this application is such that when the hydrostatic continuously variable transmission 10 (commonly referred to as “HST”, hereinafter referred to as “HST10”) is switched to the reverse side, In connection with this, transmission to the seedling transplanting machine 5 (hereinafter referred to as “rice transplanting apparatus 5” because it is a “rice transplanting apparatus” in the embodiment) is cut off, and the seedling tank 11 starts from the left and right reciprocating movements. The rotation on the planting locus of the seedling planting pot 1 as a planting tool is also automatically stopped at a midpoint of operation.

  Therefore, the seedling planting rod 1 often stops at a position where it enters the soil or stops at an intermediate position of the planting locus. In the former case, the planting claw is moved in the mud as it proceeds. In the latter case, the planting start timing of the next process by the next operation may be out of order, and the subsequent planting work may not be performed well.

  Therefore, in the embodiment of the present invention, when the HST 10 is switched to the forward side, the control function is activated and the fixed position stop clutch 2 of the seedling planting basket 1 is automatically turned on and off, and the seedling planting basket 1 is normally operated. Return to the fixed position and wait. Therefore, the seedling planting basket 1 of the rice planting device 5 does not get damaged by being dragged in the mud even if the traveling vehicle body 3 moves into the next process, and further the clutch 2 of the seedling planting basket 1 When is inserted, the planting rotation starts, but the initial start timing is observed and correct planting operation starts.

Embodiments of the present invention will be specifically described below with reference to the drawings.
First, as shown in FIGS. 1 and 2, the traveling vehicle body 3 that connects the rice transplanter 5 is equipped with a pair of left and right front wheels 12 and 12 at the front and left and right rear wheels 13 and 13 at the rear. It is provided so as to be able to travel on a paddy field with the front wheels 12 and 12 as steering wheels and the rear wheels 13 and 13 as drive wheels. And as can be seen from the drawings, the control seat 15 is provided at a high position at the center position of the traveling vehicle body 3, and a floor 16 is formed at a low position from the front side and the left and right sides to the rear. As shown in the drawing, the steering handle 17 is provided in front of the steering seat 15 with the floor 16 therebetween, and the front wheels 12 and 12 can be lightly steered via a power steering mechanism.

  The operation levers and operation pedals for operating each part of the rice planting device 5 are arranged around the steering handle 17 so that each device of the traveling vehicle body 3 can be operated easily so that the rice transplanting work can be performed easily. It is supposed to be possible.

  As shown in FIG. 1, the HST 10 is installed at the front lower position of the floor 16 and is driven and driven from the engine 18 below the control seat 15. It is connected to the mission device 19 and is configured to perform forward / reverse travel switching and vehicle speed increase / decrease adjustment. The HST 10 can be operated by the main speed change lever 20 disposed on the side of the steering handle 17, and if it is tilted forward with respect to the neutral position as a reference, it rotates forward and transmits forward, If it is switched to the side and tilted, it will reversely rotate and transmit, so it will travel backwards.

  Further, when the main transmission operating lever 20 is tilted forward (forward), the forward speed is sequentially increased in accordance with the tilt angle in the same direction, and conversely, it is switched to the rear side beyond the neutral position and reversely moved. When the vehicle is tilted rearward as it is running, the reverse speed is increased according to the tilt angle.

As described above, the “forward / reverse switching device 4” of the present invention corresponds to the HST 10 described in the embodiment, and the main transmission operation lever 20 for performing switching operation is also a main component.
Next, the rice transplanter 5 will be specifically described with reference to FIGS. 1 and 2.

  First, in the case of the embodiment, the rice transplanter 5 shows a six-row rice transplanter, but a four-point parallel link mechanism in which the front part is connected to a vertical mounting machine frame 23 provided at the rear part of the traveling vehicle body 3. It is connected to the rear part of 24, and is received by the lower leveling float, and is supported in such a configuration that it can move up and down freely while adapting to the unevenness of the planting field scene.

  As shown in FIGS. 1 and 2, the seedling planting rod 1 is provided with a shaft mounted at a low position near the ground at the rear of the rice planting device 5, and rotates while drawing an egg-shaped planting locus. Thus, the structure is configured such that it can be circulated and rotated between the seedling outlet 26 of the front plate 25 at a fixed position and the field scene so that a single seedling can be held and planted in the field scene. And the seedling tank 11 is comprised so that the seedling for one stock can be supplied to the said seedling extraction outlet 26 in a fixed position, reciprocating horizontally in the left-right direction.

  As shown in FIG. 1, the planting clutch case 28 is installed at the rear portion of the traveling vehicle body 3 and is provided with the fixed position stop clutch 2, and the seedling planting is provided from the case 28 through the planting transmission shaft 29. It is set as the structure which transmits planting rotational power to the appendix 1. In this case, as shown in FIG. 4, the planting clutch case 28 includes four sets of transmission gears 32, 33, 34, 35 and one set of eccentric gears 36 between the input shaft 30 and the clutch shaft 31. Is incorporated and used for planting adjustment by changing the planting speed or other special planting methods, but the description is omitted because it is not directly related to the invention of this application.

  The fixed-position stop clutch 2 has a fixed-position stop cam 2b that is freely slidable on the output-side planting transmission shaft 29 that moves away from the drive-side engagement protrusion 2a provided on the clutch shaft 31. It is configured to be cut at a fixed position by the insertion / removal operation of the attached stop pin 2c and the spring force. In the embodiment, as shown in FIGS. 4 and 5, the planting stop pin 2 c is configured to be controlled to be turned on and off by a control operating arm 40 that operates from a control motor 38 via a speed reducer 39. .

  As described above, in the fixed position stop clutch 2, in FIG. 4, while the drive side engagement protrusion 2 a of the clutch shaft 31 and the fixed position stop cam 2 b are engaged and transmitted, Is output and the control motor 38 is driven, the control actuating arm 40 pushes the planting stop pin 2c to the cutting side via the speed reducer 39 and moves the fixed position stop cam 2b to the cutting side while resisting the spring force. The guide is guided and the clutch is disengaged at a fixed position.

  At this time, the seedling planting rod 1 is transmitted via the planting transmission shaft 29, but when the fixed position stop clutch 2 reaches the disengaged position, the transmission is interrupted and all the six strips are aligned and the planting locus Will stop at the regular home position at the top of the.

  In the embodiment, the raising / lowering switch and the planting button of the rice planting device 5 are provided in the grip portion of the main transmission operating lever 20 so that the manual raising / lowering operation and the clutch operation of the seedling planting basket 1 can be performed. It is configured.

  Then, when the rice transplanter 5 switches the traveling vehicle body 3 to reverse traveling by operating the main speed change lever 20, the control mechanism (not shown) works and the auto lift works to raise all the transmissions. It is configured to be cut off automatically. Then, when the rice transplanter 5 switches the main shift operation lever 20 to the forward side in the next operation, a control mechanism (not shown) is operated, the control motor 38 is automatically controlled and the control operation arm 40 is operated. Then, the planting stop pin 2c is controlled and operated, and once the fixed position stop clutch 2 is engaged and transmitted, the clutch 2 is controlled and operated at the next moment.

  Therefore, each seedling planting basket 1 of the rice planting device 5 is transmitted once and rotates on the planting locus immediately after stopping at any position due to the previous automatic stop. Since the position stop clutch 2 is working, it is possible to stop at a normal regular fixed position and stand by.

The operation of the embodiment configured as described above will be described based on the flowchart shown in FIG.
First, the rice planting device 5 performs a planting operation while the traveling vehicle body 3 is traveling. When the rice planting device 5 reaches the end of the field and turns, the operator switches the main transmission operation lever 20 to the reverse position. Then, the rice planting device 5 is automatically lifted by the automatic lift, and the transmission is cut off, and the seedling tank 11 as well as the seedling planting rod 1 is automatically stopped at that position.

  Next, when the rice transplanter 5 switches the main speed change operation lever 20 to the forward side in order to move to the next process, the control mechanism is activated, and the rotational power is transmitted from the input shaft 30 to the clutch shaft 31. The control motor 38 described in 5 is driven, and the control operation for turning on and off the fixed position stop clutch 2 is performed, and the seedling planting rod 1 that has been automatically stopped at the middle position is returned to the regular fixed position and stopped. .

  As described above, in the embodiment, as a result of the transmission to the whole rice transplanter 5 being cut off as the main speed change operation lever 20 is switched to the reverse operation, the seedling planting rod 1 that has been automatically stopped is located at any position. If the lever 20 is switched to the forward side by the next operation, the fixed position stop clutch 2 is automatically turned on / off and controlled to return to the normal fixed position. it can.

  Therefore, the seedling planting rod 1 of the embodiment is waiting at a normal regular fixed position when moving to the planting operation of the next process, and the planting claws are damaged by being pulled in the mud during traveling. The planting operation can be started from a fixed position without changing the timing of the planting start.

Below, each Example with which the traveling vehicle body 3 which is a present Example and the rice transplanter 5 are equipped is demonstrated.
First, the traveling vehicle body 3 employs a mechanism in which an auto lift operates when the steering angle of the steering wheel 17 is steered by a certain angle or more during turning during work. Actually, the auto lift is required when the vehicle body 3 is turned in the field. For example, when the course is changed by a deformed rice field or the like, the auto lift is not necessary. It would be a problem if 5 rises automatically.

  In the embodiment, a hydraulic damper, an air damper, or a lining with a stopper is interposed between a pitman arm and a hydraulic lift lever to which the steering operation force of the steering handle 17 is transmitted to the front wheels 12 and 12 side. The operation of the pitman arm is not transmitted at a cutting angle of a predetermined angle or less. In other words, the hydraulic lift lever is intended to be configured so that the rice transplanter 5 can be automatically raised accurately when the steering angle of the handle is increased and the vehicle body is turned at the end of the field.

Next, an embodiment for appropriately stopping the seedling planting basket 1 will be described.
When the clutch is disengaged, the seedling planting basket 1 works to continue the planting rotation by the inertial force of the seedling planting basket 1 itself, and a shackle phenomenon occurs, but this is prevented. In the embodiment, the lock type torque diode is connected to the seedling planting rod 1 as a configuration in which the planting portion input shaft or the input shaft of the planting clutch case 28 is installed.

  When the input shaft is rotated, the lock type torque diode rotates and outputs the output shaft, but when the input shaft is stopped, both the output shafts are locked and cannot be rotated. Therefore, when the device is provided at a midway position of transmission, the seedling planting rod 1 is a device that can stop the shackle phenomenon and stop at a fixed position accurately.

  Next, the traveling vehicle body 3 has already been described as adopting a mechanism in which an auto lift operates when the steering angle of the steering handle 17 is steered beyond a certain angle when turning during work. In the case of changing the course, an example will be described for countermeasures when the auto lift works due to a malfunction and the rice transplanter 5 automatically rises halfway and collides with a straw and tilts.

First, as a means for detecting that the rice transplanter 5 has collided with the paddle, the detection devices of various control devices equipped in the rice transplanter 5 are used. For example,
1. A sensor (switch) provided in a swing spring portion that detects that the rice transplanter 5 can no longer be raised.

2. A slope sensor for rolling control that detects that the vehicle has collided to rise and tilt.
3. Potentiometer for raising / lowering control (detects sudden change in raising speed).
4. Other shock (acceleration) sensors.
Etc. are available.

Next, as an emergency means to prevent the rice transplanter 5 from being damaged,
a, control for forcibly switching the HST to the neutral position. Stop driving.
b, Control for automatically stopping the engine. Stop driving.

c, Control for interrupting the ascent of the rice transplanting device (down control after the ascent interruption).
As described above, the rice transplanter 5 can prevent damage by combining the detection means 1 to 4 and the emergency means by specific control of a to c.

  As an example, the slope sensor detects that if the rice transplanter 5 is tilted abnormally in a state where the rice transplanter 5 collides with a fence while it is rising due to a malfunction, this information is detected and the detection information is sent to a control mechanism (not shown). Then, the controller outputs a control signal to the actuator to control the HST 10 to the neutral position, or the engine 18 is automatically stopped. As a result, the rice transplanter 5 stops at that position, and no further damage accident occurs.

Next, an embodiment of the control at the start of the rice transplanter 5 will be described with reference to FIGS.
Normally, as shown in FIG. 7, the rice transplanter 5 extends the hydraulic cylinder 50 and lowers the four-point parallel link mechanism 24 to ground the rice transplanter 5 on the paddy surface, and then starts the rear wheels 13 and 13. Then, when the forward traveling is started, the rice transplanter 5 side sinks, and conversely, as shown in the drawing, the front wheels 12 and 12 float upward from the topsoil surface (height H). It is known that this phenomenon occurs due to the driving torque of the rear wheels 13 and 13.

  Therefore, in the embodiment, when the traveling body 3 is provided with a control mechanism and the hydraulic cylinder 50 is extended to descend the rice transplanter 5, the front descent prevention distance (rising of the front wheels 12, 12 is increased to the normal descending length. The control is performed to increase the amount of hydraulic oil fed so as to extend the length including the depth corresponding to the height H). Therefore, the rice transplanting device 5 reaches a position where it is pushed down to a state where it has been sunk for the front wheel levitation prevention distance. The control mechanism (not shown) has a control configuration in which when the start of the traveling vehicle body 3 is completed and the normal traveling operation is started, the increased amount of hydraulic oil in the hydraulic cylinder 50 is decreased and returned to the normal extension length. . FIG. 7 shows the starting state of the conventional device, and FIG. 8 shows the starting state of the traveling vehicle body 3 according to the embodiment.

  Therefore, as shown in the flowchart of FIG. 6, the rice transplanter 5 according to this embodiment is characterized in that the front wheels 12 and 12 are prevented from rising and the rice transplanting operation can be started safely.

  Next, a steering operation by the steering handle 17 and a traveling vehicle body 3 of the rice transplanting device 5 capable of making a small turn even in a narrow field by applying a side clutch and a side brake in conjunction with this operation will be described with reference to FIGS. 9 and 10. Examples will be described.

  First, as shown in FIG. 9, the side clutches 55, 55 are mounted on the rear wheels 13, 13 of the traveling vehicle body 3, and the transmission is cut off by the turning operation on one side and the rear wheels 13 driven on the outside of the turn are driven. Although it turns, this is combined with the steering mechanism to realize a turning device with a small turn. In this case, as shown in the schematic mechanism diagram of FIG. 9, the side clutches 55 and 55 are configured so as to be operable from the pitman arm 56 operated by the steering handle 17 via the interlocking spring 57 and the side clutch arm 58. Yes. In this case, the initial tension of the interlocking spring 57 is set larger than the spring tension when the clutch plate on the side clutch 55 side is in close contact.

  In the embodiment, when the steering handle 17 is turned, the pitman arm 56 is operated and rotated to steer the front wheels 12 and 12, and at the same time, the one side clutch arm 58 is moved from the one side interlocking spring 57. Operate to turn off the side clutch 55 inside the turn.

  Therefore, in the traveling vehicle body 3, due to the steering action of the front wheels 12 and 12, the side clutch 55 on one of the rear wheels 13 and 13 (turning inside) is turned off and the transmission is stopped, so Effective turning can be performed.

In the embodiment shown in FIG. 10, in addition to the side clutch 55, the side brake 60 is further operated to realize a turning mechanism that works more effectively.
In this embodiment, four-wheel drive is assumed. However, left and right side clutches 55 are provided in the front transmission case 61, and the rear wheel transmission shaft 62 output from the side clutch 55 is connected to the side brake 60 of the rear case 63. Configured. Although not shown in the drawings, this embodiment employs a side brake control mechanism and is configured such that the brake can be turned by a selection dial.

  As described above, in the case of the rear wheel drive, in addition to the steering operation of the front wheels 12 and 12 by the steering handle 17, the driven rear wheels 13 and 13 are turned by the side clutches 55 and 55, and further, the four-wheel drive is performed. , The front wheels 12, 12 are turned by the steering operation and the side clutch, and in addition, one of the rear wheels 13, 13 (turning inside) is brought into a brake turn state by the side brakes 60, 60. Small turning and ultra-small turning are possible.

Next, an embodiment in which the hydraulic pump 64 can be driven even when the traveling vehicle body 3 connected to the rice transplanter 5 is stopped in a brake state will be described with reference to FIGS. 11 to 13.
Normally, when the passenger rice transplanter depresses the brake pedal 65 and brakes the four wheels (front wheels 12, 12 and rear wheels 13, 13), the HST 10 is switched to neutral, and the braking force acts on the four wheels. 3 is stopped, and at the same time, the hydraulic pump 64 provided on the HST 10 side is also stopped. In this case, as shown in FIG. 12 or FIG. 13, the hydraulic pump 64 is configured to be transmitted from the engine 18 by the belt tension clutch 66. However, when the brakes are applied to the four wheels, the main tension 67 is cut and transmission is performed. It is configured to interrupt. Therefore, the conventional passenger rice transplanter has a problem that if the traveling vehicle body 3 is stopped by applying braking force to the four wheels, the rice transplanter 5 cannot be raised even if the hydraulic lift lever 68 is raised.

  Therefore, in the embodiment shown in FIG. 12, when the hydraulic lift lever 68 is operated to the up side, the auxiliary tension 69 that operates in conjunction with this operation is activated, the belt tension clutch 66 is engaged, and the hydraulic pump 64 is driven. Thus, the hydraulic oil can be fed and raised.

  In the embodiment of FIG. 13, the control motor 70 is configured to engage and disengage the belt tension clutch 66. When the brake pedal 65 is depressed to apply a braking force to the four wheels 12 and 13, Although the clutch 66 is in the disengaged state, when the hydraulic lift lever 68 is operated to the up side, the hydraulic pump 64 is transmitted by being switched in relation.

  Thus, in the embodiment shown in FIG. 13, the belt tension clutch 66 is configured to be turned off by the control of the control motor 70 when the brake pedal 65 is depressed, and then the hydraulic lift lever 68 is raised. The control motor 70 is turned on in connection with the operation. Therefore, the belt tension clutch 66 can drive the hydraulic pump 68 by controlling the control motor 70 in association with the raising operation of the hydraulic lift lever 68 to switch the main tension 67 on.

  As described above, in the embodiment, when the hydraulic lifting lever 68 is operated to the up side even when the four wheels are braked and the traveling vehicle body 3 is stopped, the belt tension clutch 66 that has been cut off is related and enters. Thus, the hydraulic pump 64 is brought into a transmission state, the oil feeding operation is enabled, the hydraulic mechanism is operated, and the rice transplanter 5 can be moved up and down.

Side view of seedling transplanter Top view of seedling transplanter Flow chart of fixed position stop clutch control Cross section of planted clutch case Side view of control motor Flow chart of lifting hydraulic control Side view of rice transplanter Side view of rice transplanter Interlocking schematic diagram of steering wheel, pitman arm and side brake The interlocking schematic diagram of a side clutch and a side brake. Side view of riding rice transplanter Side view of belt tension clutch Side view of belt tension clutch operated by control motor

DESCRIPTION OF SYMBOLS 1 Seedling planting basket 2 Fixed position stop clutch 3 Traveling vehicle body 4 Forward / reverse switching device 5 Seedling transplanter.

Claims (2)

  In a seedling transplanting machine in which a traveling vehicle body (3) having left and right front wheels (12), left and right rear wheels (13) and a steering handle (17) is provided and a transplanting machine (5) is connected to the traveling vehicle body (3), steering is performed. The transplantation machine (5) is automatically raised by linking the hydraulic lift lever (68) via the pitman arm (56) that is operated by steering the handle (17). The tool (1) is transmitted through the fixed position stop clutch (2), and when the transmission is cut off by the clutch (2), the tool (1) stops at a fixed position. A forward / reverse switching device (4) for reverse traveling is mounted, and the forward / backward switching device (4) is transmitted from the engine (18), and is transmitted from the engine (18) via the belt tension clutch (66). Hydraulic pump 64), the forward / reverse switching device (4) is switched to neutral in response to the depression of the brake pedal (65), the left and right front wheels (12) and the left and right rear wheels (13) are braked, and the belt tension clutch (66 ) Of the main tension (67) to stop the transmission of the hydraulic pump (64), and the auxiliary tension (69) of the belt tension clutch (66) is interlocked with the lifting operation of the hydraulic lift lever (68). A seedling transplanting machine, characterized in that it is configured to drive the hydraulic pump (64) and raise the transplanting machine (5) by being transmitted by the motor. When the steering handle (17) is steered, it is transmitted via a hydraulic damper, an air damper or a lining with a stopper provided between the pitman arm and the hydraulic lifting lever (68), and the hydraulic lifting lever (68) is interlocked and transplanted. The seedling transplanting machine according to claim 1, wherein the machine (5) is configured to automatically raise .

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