JPH11346513A - Rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify operations at the end of a field during planting operations, make a U turn travel safe and rapidly restart the planting operations in a rice transplanter equipped with a planting clutch for engaging and disengaging power transmission from an engine to a planting device. SOLUTION: This rice transplanter is capable of automatically reducing the speed of an engine E from that at the time of performing planting operations to the preset speed when a lifting and lowering device F is transferred from lowering operations to the neutral and automatically raising the speed of the engine E from the preset speed to that at the time of carrying out the planting operations when the lifting and lowering device F is transferred from the neutral to the lowering operations.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a rice transplanter.

[0002]

2. Description of the Related Art Conventionally, when a rice transplanter reaches an end of a field during a planting operation, the planting clutch is operated to temporarily stop the planting operation, and an accelerator lever is operated to reduce the traveling speed.
Operate the planting device raising / lowering lever to raise the planting device, operate the steering wheel to make a U-turn to position the rice transplanter on the next planting strip, and then operate the planting device raising / lowering lever again. An operation is performed in which the planting device is lowered, the accelerator lever is operated to set a traveling speed suitable for the planting operation, and the planting clutch is operated to restart the planting operation.

[0003]

However, each time the plant reaches the end of the field, the above-described planting clutch and lifting lever,
The operation is complicated because it requires the operation of the accelerator lever, the planting device lifting / lowering lever, and the steering wheel. In particular, the operation of each of the above-described levers must be performed at the same time.

[0004]

Therefore, according to the present invention, in a rice transplanter having an elevating device for elevating and lowering the planting device, the elevating device is moved from a lowered position to a neutral position during traveling for planting work. At this time, the rotation of the engine is automatically reduced from the rotation speed at the time of the planting operation to a predetermined rotation speed, and when the lifting / lowering device shifts from the neutral position to the descent position, the rotation of the engine is planted from the set rotation speed. It is an object of the present invention to provide a rice transplanter characterized by automatically increasing the number of rotations at the time of attaching work.

[0005] The present invention also has the following features.

[0006] The set rotation speed can be arbitrarily set.

When the rotational speed determined by the accelerator lever for manually controlling the engine rotational speed is higher than the set rotational speed, the engine rotational speed is controlled by giving priority to the set rotational speed.

The time required for the automatic decrease and the automatic increase of the engine speed can be set.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention controls the number of revolutions of an engine by a controller having a microcomputer. The controller includes a switch for detecting an operation state of an elevating device, and a rotation of the engine. Connects a low-speed rotation speed setting device that sets the number of rotations to a rotation speed suitable for U-turn traveling and an accelerator sensor that detects the operating position of the accelerator lever, and operates the lifting device during traveling for planting work At the same time as shifting from the descent position to the neutral position, the rotation of the engine, which had maintained the rotation speed suitable for planting work by the output of the accelerator sensor, was changed to the set rotation speed set by the low-speed rotation setting device. It is trying to lower it.

Further, at the same time when the lifting / lowering device shifts from the neutral position to the lowered position, the rotation speed of the engine, which has been holding the above-mentioned set rotation speed, is reduced to a rotation speed suitable for planting work based on the output of the accelerator sensor. I try to raise it.

[0011] Further, a rotation speed increasing / decreasing time setting device is connected to the controller so that the engine rotation speed falls from a rotation speed suitable for planting operation to the set rotation speed, and
The user can arbitrarily set the time required to increase from the set number of rotations to the number of rotations during the planting operation.

Therefore, during the planting operation, when the plant reaches the end of the field, simply operating the planting clutch and raising / lowering lever to the ascending side of the planting device lowers the rotation of the engine to the set speed.
Since the traveling speed of the rice transplanter is reduced to a speed suitable for the U-turn traveling, the operation is simplified, malfunction is prevented, and the U-turn traveling can be performed safely. In addition, since the set rotation speed can be arbitrarily set by the user, the U-turn can be performed at a running speed according to the user's preference.

Further, when the planting operation is resumed after the U-turn running, the engine rotation is based on the output of the accelerator sensor only by operating the planting clutch / elevating lever to the lowering side of the planting device. Since the number of rotations at the time of the planting operation is increased and returns to the previous planting traveling speed, a highly efficient planting operation can be performed.

Further, since the increase / decrease of the running speed can be set according to the preference of the user by the rotation speed increase / decrease setting device, the shock accompanying the rapid increase / decrease of the engine speed can be prevented, and the planting can be performed at the rhythm desired by the user. Work can be performed.

[0015]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 and FIG. 2 show a rice transplanter A according to the present invention. The rice transplanter A has a parallel link mechanism 2, a lifting device F, The planting apparatus B is connected to the left and right tilting mechanism 3 so as to be able to move up and down and to the left and right so that the traveling machine 1 pulls the planting apparatus B to plant seedlings on the rice field.

The traveling body 1 is configured as a four-wheel drive vehicle that drives both the left and right front wheels 4 and the left and right rear wheels 5 constituting the traveling section G. An engine E is disposed inside the hood 6 and A steering wheel 7 protrudes from a rear portion of the hood 6, and a pedal 8 such as a clutch or a brake is provided below the steering wheel 7.

An accelerator lever 9 is provided on the right side of the steering wheel 7, and a planting clutch and lifting lever having a planting clutch and lifting guide groove 11 inserted in the right side of the seat 10.
12 are arranged.

As shown in FIG. 3, the planting clutch / elevating guide groove 11 is formed to extend in the front-rear direction, and at the front of the movable range of the planting clutch / elevating lever 12, the auxiliary transmission The speed change ratio can be operated so that the front becomes high speed and the rear becomes low speed. The planting clutch C, which will be described later, is "on" from the front to the middle, and the planting clutch C from the middle to the rear.
Can be operated to "off", and at the rear, the elevating device F can be operated to "lower", the middle part to "neutral", and the rear to "raise". As described above, since the operation of the planting clutch and lifting lever 12 is guided by the planting clutch and lifting guide groove 11, when the lifting device F is operated from the "down" position to the "up" position, and When operating from the "up" position to the "down" position, it must pass through the "neutral" position.

Further, the above-mentioned planting clutch and lifting guide groove 11
Left and right recesses 13 and rear recesses 14 are formed in the front and rear positions of the middle part, respectively, and when the planting clutch and lifting lever 12 is positioned in one of the left and right recesses 13, the side marker on that side is formed. Is lowered, and when it is positioned in the rear recess 14, the raising and lowering operation of the planting device B is stopped.

On the left side of the seat 10, there is provided a main transmission lever 18 through which a main transmission guide groove 17 is inserted. The main transmission guide groove 17 is formed in a substantially Y-shape expanding rearward. When the main transmission lever 18 is located at the front end of the main transmission guide groove 17, the main clutch is "on" and the main transmission has a gear ratio suitable for traveling on the road. Section, the main clutch is "on" and the vehicle is in reverse, and when it is positioned at the left rear end, the main clutch is "off".
I am trying to be.

In the planting apparatus B, a connecting pipe 20 extending in the left-right direction is inserted into a central planting case 19, and a plurality of planting cases 21 are arranged in the connecting pipe 20 at appropriate intervals. Above, a seedling table 24 inclined forward and backward is arranged via upper and lower rails 22 and 23 extending in the left-right direction so as to be able to reciprocate left and right, and a planting claw 25 attached to each planting case 21 is provided. By the operation, a predetermined amount of seedlings is scraped from the seedling mat placed on the seedling placing stand 24 and is planted on the rice field. In the figure, 26 is a float.

As shown in FIGS. 1 and 4, the parallel link mechanism 2 includes upper and lower portions of a frame 27 erected at a rear portion of the traveling body 1 and a portal frame connected to a front surface of a lower portion of the planting device B. The upper and lower portions 28 are connected to each other by a top link 29 and a lower link 30, respectively, so that the planting apparatus B can be translated in the vertical direction.

As shown in FIG. 1, the lifting device F has a vertical frame 30a erected at the front end of the lower link 30, and an inclined frame 30b is erected between the upper end of the vertical frame 30a and the lower link 30. At the same time, an elevating hydraulic cylinder 31 is interposed between the upper end of the vertical frame 30a and the traveling machine body 1 to
Is moved to the “down” position, the hydraulic cylinder 31
When the planting device B is extended and lowered, and the planting device B is operated to the “neutral” position, the elevating hydraulic cylinder 31 holds the stopped state, holds the stopped state of the planting device B in the elevating operation, , The raising / lowering hydraulic cylinder 31 is shortened to raise the planting device B.

As shown in FIGS. 4 and 5, the left-right tilting mechanism 3 includes a rolling shaft 32 in which the portal frame 28 and the central planting case 19 are arranged with their shafts extending substantially in the front-rear direction. And a support 33 erected on the upper surface of the portal frame 28 and a support 33 erected on the central planting case 19 to support the upper rail 22 while rotatably connecting the upper rail 22. The rod type tilting hydraulic cylinder 35 is interposed, and the planting device B is moved by the expansion and contraction operation of the tilting hydraulic cylinder 35 to move the planting machine 1.
To the left and right.

FIG. 6 shows a power transmission mechanism D to the traveling section G,
3 shows a configuration with a controller 40 that controls the engine E.

The power transmission mechanism D has an continuously variable transmission 41 interlocked with the engine E, a main clutch 42 interlocked with the continuously variable transmission 41, and a transmission 43 interlocked with the main clutch 42. The transmission 43 is operatively connected to the traveling portion G, and the axle 44 is operatively connected thereto. The transmission 43 is also operatively connected to the planting clutch C, and the planting device B is operatively connected to the transmission clutch C.

Therefore, the power for driving the traveling section G is transmitted in the order of the engine E, the continuously variable transmission 41, the main clutch 42, the transmission 43, and the rear axle 44. The drive is performed at a rotation speed proportional to a value obtained by dividing the rotation speed by the reduction ratio of the continuously variable transmission 41. Also,
The power for driving the planting device B is from the engine E to the continuously variable transmission.
41 → main clutch 42 → transmission 43 → planting clutch C → planting device B in this order, and the connection and disconnection of the power transmission of planting clutch C turns ON / OFF the planting device B operation. can do.

The controller 40 incorporates a microcomputer and has arithmetic and storage functions. On the input side of the controller 40, an accelerator sensor 45, a planting clutch sensor 46, a low speed rotational speed setting device 47, A rotation speed increasing / decreasing time setting device 48, a neutral sensor 49 for raising and lowering, and a rotation sensor 50 attached to the engine E are connected, and a fuel injection amount adjusting device 51 is connected to an output side of the controller 40.

The accelerator sensor 45 is linked to the base end of the accelerator lever 9 via an accelerator wire 52 so as to detect the operation amount of the accelerator lever 9 and output it to the controller 40. . In the figure, 61 is a return spring.

As shown in FIG. 3, the planting clutch sensor 46 is disposed at the front of the planting clutch / elevation guide groove 11 so as to be freely attached to and detached from the base end of the planting clutch / elevation lever 12. When the planting clutch and lifting lever 12 is operated to the power transmission disconnection side, the conduction is established.

The low-speed rotation speed setting device 47 has a built-in variable resistor. The resistance value is changed to three stages by a dial 53 and output to the controller 40. For example, 1500rpm, 2000rpm
, The number of rotations held by the accelerator lever 9 can be set in three stages.

The rotational speed increase / decrease time setting unit 48 has a built-in variable resistor, the resistance value of which is changed by a dial 54 and output to the controller 40. It can be set between ~ 5 seconds.

As shown in FIG. 3, the elevation neutral sensor 49
At the rear of the planting clutch / elevation guide groove 11, a base end of the planting clutch / elevation lever 12 is provided so as to be freely attached to and detached from the base. When the planting clutch / elevation lever 12 passes through "neutral". And outputs a signal to the controller 40. Therefore, the passage of the neutral position when the lifting device F and the planting device B shift from the descending position to the ascending position, and the passage of the neutral position when shifting from the ascending position to the descending position can be detected.

The rotation sensor 50 is attached to the engine E, and outputs the rotation speed of the engine E to the controller 40.

The fuel injection amount adjusting device 51 is attached to the fuel injection pump 55 for supplying fuel to the engine E, and adjusts the fuel injection amount of the fuel injection pump 55 according to a control signal from the controller 40. .

Next, the operation of this embodiment will be described.

Prior to the start of the planting operation, the low-speed rotation setting device 47 is set in advance to a value (low-speed rotation) suitable for U-turn running according to the user's preference, and the rotation speed increase / decrease time setting device 48 is set.
Is set to a value desired by the user, and the accelerator lever 9 is used to rotate the engine E at a rotational speed suitable for high-speed planting work (high-speed rotational speed).
Rotate to perform planting work.

During the high-speed planting operation, when the planting clutch / elevating lever 12 is operated backward when it reaches the end of the field, first, the reduction ratio of the continuously variable transmission 41 increases, and the vehicle speed decreases. When the operation is further continued in the backward direction, the planting clutch C
When the operation of the planting apparatus B is stopped and the operation is further continued in the backward direction, the lifting / lowering apparatus F, which has been in the "down" operation, becomes "neutral", and then becomes the "up" operation.

As described above, the planting clutch and lifting lever 12
When the vehicle passes through the “neutral” position, the elevation neutral sensor 49 outputs to the controller 40, and the rotation speed of the engine E is automatically increased from the high rotation speed set by the accelerator lever 9 to the low rotation speed. Since the rotation speed set by the setting device 47 is reduced and the vehicle speed is further reduced, the U-turn traveling can be performed safely.

When the U-turn running is completed and the planting clutch / lifting lever 12 is operated in the forward direction in order to resume the planting work, the lifting device F is raised in the reverse order. ”Operation to“ lower ”operation through“ neutral ”
When the planting clutch and lifting lever 12 passes the `` neutral '' position, the lifting neutral sensor 49 outputs to the controller 40,
The rotation speed of the engine E automatically increases from the rotation speed set by the low-speed rotation setting device 47 to the high rotation speed set by the accelerator lever 9 and the vehicle speed increases. After the connection, the planting device B resumes operation, the reduction ratio of the continuously variable transmission 41 becomes smaller, the vehicle speed further increases, and high-speed running suitable for high-speed planting work is achieved.

In addition, since the above-mentioned increase and decrease of the number of rotations is performed slowly over the time set by the number-of-revolutions increase / decrease time setting device 48, no shock occurs and problems such as collapse of the seedlings on the seedling mounting table 24 are prevented. Since the user can arbitrarily set the time required to increase or decrease the rotation speed, the planting operation can be performed with a comfortable rhythm.

The control of the engine speed of the planting clutch and elevating lever 12 is prioritized over the control of the speed of the accelerator lever 9, so that the U-turn can be performed regardless of the operating position of the accelerator lever 9. Since the aircraft travels at a low speed suitable for traveling, safety can be improved.

In the case of movement in a field where planting work is not performed, if the low-speed rotation speed setting device 47 is operated to the rotation speed holding position by the accelerator lever 9, the engine E can be operated by the accelerator lever 9. By adjusting the rotation speed, it is possible to run at a desired speed.

FIG. 7 shows another embodiment in which the vehicle speed and the depth of the hard disk 70 are detected during the planting operation, and the output of the engine E is automatically increased when the hard disk 70 is at a deep position. An example is shown, for detecting the depth of the hard platen 70, an ultrasonic sensor 71 is provided on the traveling body 1 to detect the height of the rice field surface 72 with respect to the ultrasonic sensor 71, and the ultrasonic sensor 71 Means for setting the value obtained by subtracting the distance from the lower end of the rear wheel 5 to the depth of the hard disk 70, or by providing a potentiometer 73 between the front end of the lower link 30 and the fuselage so that the relative position between the lower link 30 and the fuselage An angle is detected, and a float 26 sliding on a rice field 72 is detected from the detected value.
And the distance between the lower end of the rear wheel 5 and the calculated value
There are means such as 70 depth.

With this configuration, the large planting device B can be
Stalling of the engine E that occurs when the engine E is connected to the running body 1 with small horsepower can be prevented, and the planting operation can be performed smoothly.

That is, the power of the engine E is consumed mainly for towing the planting apparatus B and traveling in the field, and when the hard disk 70 is deep, the power consumption for the traveling increases sharply. In addition, the rotation speed of the engine E decreases, and especially in an engine having a small margin output, the rotation speed sharply decreases, and the rotation speed control by the governor cannot be performed in time, so that the engine E is likely to stall.

However, in this embodiment, the increase in the depth of the hard disk 70 preceding the decrease in the rotational speed of the engine E is detected, and the output of the engine E is automatically increased. Also, the decrease in the rotation speed becomes gentle, and the stall of the engine E can be prevented.

The delay between the detection of the increase in the depth of the hard disk 70 and the increase in the output of the engine E depends on the inertial force of the traveling machine 1 and the planting device B, particularly the flywheel of the engine E, the traveling machine 1 and the like. It is compensated by the second moment of the rotating part in the implant B.

[0050]

According to the present invention, the following effects can be obtained.

According to the first aspect of the present invention, in a rice transplanter provided with an elevating device for raising and lowering the planting device, when the elevating device shifts from the lowered position to the neutral position during traveling for planting work, the engine is operated. The rotation of the engine is automatically reduced from the rotation speed at the time of the planting operation to the predetermined rotation speed, and when the lifting / lowering device shifts from the neutral position to the lowering position, the rotation of the engine is reduced from the set rotation speed at the time of the planting operation. When the planting device is moved from the descent position to the ascending position by automatically raising the rotation speed, the engine speed is automatically reduced after passing the neutral position, and the traveling speed is reduced, so it is safe. When the U-turn travel is completed and the planting device is shifted from the raised position to the lowered position after passing the U-turn, the engine speed automatically increases when passing through the neutral position. Immediately after the U-turn at the end of the field, the planting operation can be resumed, and without having to manually control the engine speed such as the accelerator, the planting operation can be immediately performed while simplifying the operation at the end of the field. Attaching work can be resumed.

According to the second aspect of the present invention, since the set rotation speed can be arbitrarily set, the traveling speed during the U-turn can be set to a value suitable for the driving level of the user and the field conditions. Thus, it is possible to shorten the time required for the U-turn traveling while improving safety and improve the work efficiency.

According to the third aspect of the present invention, when the rotational speed determined by the accelerator lever for manually controlling the engine rotational speed is higher than the set rotational speed, the engine rotational speed is prioritized for the set rotational speed. By performing the control, the vehicle is driven at a low speed suitable for U-turn driving regardless of the accelerator lever operation position, so that safety can be enhanced.

According to the fourth aspect of the present invention, the time required for the automatic decrease and the automatic increase of the engine speed can be set, so that the increase or decrease of the engine speed is reduced by the time set by the engine speed increase / decrease time setting device. Since shock is not generated because it is performed slowly, it is possible to prevent problems such as seedling collapse on the seedling mounting table, and further, the user can arbitrarily set the time required to increase or decrease the rotation speed, Planting work can be performed with a comfortable rhythm.

[Brief description of the drawings]

FIG. 1 is a side view of a rice transplanter according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a plan view of a planting clutch and elevating guide groove.

FIG. 4 is a side view of a left-right tilt mechanism.

FIG. 5 is a plan view of a left-right tilt mechanism.

FIG. 6 is an explanatory diagram showing a configuration of a power transmission mechanism and a controller.

FIG. 7 is an explanatory side view showing the configuration of another embodiment.

[Explanation of symbols]

 A Rice transplanter E Engine B Planting device F Lifting device 9 Accelerator lever

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Takashi Yamada 1-32 Chaya-cho, Kita-ku, Osaka-shi, Osaka Inside Yanmar Agricultural Machinery Co., Ltd.

Claims (4)

[Claims] A lifting device for raising and lowering a planting device (B)
In the rice transplanter (A) equipped with (F), when the lifting device (F) shifts from the lowered position to the neutral position during traveling for planting work, the rotation of the engine (E) is reduced during planting work. When the elevating device (F) shifts from the neutral position to the descent position, the rotation of the engine (E) is automatically reduced from the set rotation speed to the rotation speed at the time of planting work. Rice transplanter characterized by automatically rising up to 2. The rice transplanter according to claim 1, wherein said set rotation speed can be set arbitrarily. 3. When the number of revolutions determined by an accelerator lever (9) for manually controlling the engine speed is higher than the set number of revolutions, the engine speed is controlled by giving priority to the set number of revolutions. The rice transplanter according to claim 1 or 2, wherein: 4. The rice transplanter according to claim 1, wherein a time required for automatically decreasing and automatically increasing the engine speed can be set.