JP2001128518A - Planting section position control mechanism of rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that it is impossible to lower a planting section at a proper height, confirm the rear state and simultaneously allow a conventional rice transplanter to backward travel, because a main speed change lever is mechanically connected to a planting clutch in the conventional rice transplanter and further because the height of the planting section can not be changed at an arbitrary position during the backward travel of the conventional rice transplanter, even when a planting operation lever is operated. SOLUTION: Operation positions such as an upper position 52a.a lower position 52b for upward or downward moving a planting section 15, a neutral position 52d for fixing the planting section 15 to an arbitrary height during the upward or downward movement of the planting section 15, a planting position 52c for starting the planting operation, and marker canceling positions 52e.52f for canceling line-drawing markers are disposed in a planting operation portion 51. A holding mechanism 61 which can hold a planting operation lever 52 at either of the operation positions or cancel the lever 52 from the operation position is disposed. On the other hand, a rearward travel-detecting means 62 for detecting the switching of a main speed change lever to the rearward travel is disposed in a main speed change portion. The rearward travel-detecting means 62 is connected and interlocked with the holding mechanism 61, and the holding mechanism 61 can be canceled, when the rice transplanter is backward traveled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for controlling a planting operation lever during a reverse operation of a main transmission lever of a rice transplanter.

[0002]

2. Description of the Related Art Conventionally, O / S of moving up and down of a planting section and planting operation has been known.
Operations required for the planting operation, such as N.OFF, are performed on a planting operation unit disposed on a panel in front of or below the driver's seat, and in actual work, the planting operation unit is used. The operation is shifted to each operation by moving or rotating a planting operation lever or the like provided in the above to a position corresponding to a predetermined operation mode (hereinafter referred to as “operation position”).

[0003] In addition, in the case of reversing in order to make a turn at the ridge during the planting operation, the main shifting lever of the main transmission portion is set to the "reverse position", and at the same time, the planting clutch of the planting operation portion is disengaged. The so-called back interlock was performed in which the planting section was raised to the uppermost position and held.

[0004]

However, in the conventional planting operation lever, there is a system in which the planting operation lever returns to the neutral position when it is moved or rotated to a predetermined operation position and released. There is a problem in that the current operation mode is unknown only by visually checking the position, and it is difficult to shift to a quick and reliable operation.

Further, since the connection between the main speed change lever and the planting clutch is made mechanically, the height of the planting portion cannot be changed to any position by operating the planting operation lever during reverse running. There was a problem that it was not possible to drive backward while lowering the planting section to an appropriate height and checking the rear.

[0006] The mechanical connection structure itself is complicated, and the number of components is large, and the types are various.
There has also been a problem that parts costs and assembly costs are high.

Further, when the main shift lever is turned to the "reverse position", the mechanical connection causes a resistance, and the force required for turning the main shift lever is increased, thereby deteriorating the operability. There was also the problem of making it work.

[0008]

The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described. That is, in claim 1,
The operating lever is disposed on the planting operation section, and a holding mechanism capable of rotating and releasing the operating lever is provided. On the other hand, the operating lever is moved from the “up position”, “down position”, “neutral position”, The "planting position" of the planting operation ON and the "marker release position" for releasing the drawing marker can be held.
A reverse detection means for detecting switching to reverse of the main shift is provided,
The reverse detection means and the holding mechanism are connected and linked to release the holding mechanism when the vehicle moves backward.

According to a second aspect of the present invention, the release of the holding mechanism is continued for a set time.

According to a third aspect of the present invention, the release duration of the holding mechanism according to the first aspect is set to a time until the height of the planted portion becomes higher than the height of the planted portion when the main transmission is switched to reverse. It was done.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall side view of a riding rice transplanter, FIG.
FIG. 3 is a perspective view of a front portion of the body having the planting operation section according to the present invention. FIG. 3 is a partial cross-sectional side view of the body front showing the mounting configuration of the planting operation section. FIG. , FIG. 5 is a plan view of the same, FIG. 6 is a plan view of the shape of the guide groove,
7 is a plan view showing the correspondence between the position of the planting operation lever and the operation mode, FIG. 8 is a partial cross-sectional side view showing the holding mechanism, FIG. 9 is a partial front sectional view of the same, and FIG. FIG. 11 is a control block diagram showing a control means, FIG. 11 is a flowchart of planting portion height control, and FIG. 12 is a flowchart of another form of planting portion height control.

First, the overall structure of a riding rice transplanter according to the present invention will be described with reference to FIG. Reference numeral 1 denotes a traveling vehicle on which an operator rides. The engine 2 is mounted above a front portion of a vehicle body frame 3, and a traveling front wheel 6 is supported in front of a transmission case 4 via a front axle case. A rear axle case is connected to the rear part, and the rear axle case supports the traveling rear wheel 8.

Then, the engine 2 and the like are
And a driver's seat 13 is mounted on the upper part of the vehicle body cover 12 on which the operator rides via the step 11.
A main shift lever 5 is disposed to the left of 3, and a steering handle 14 is provided upright in front of the driver's seat 13 and behind the bonnet 9. Further, a planting operation section 51 according to the present invention is disposed on the right side of the steering handle 14.

Numeral 15 denotes a planting portion having a seedling mounting table 16 and a plurality of planting claws 17 and the like. The planting case 20 is supported by the planting case 20 via the guide rail 19 so as to be reciprocally slidable left and right, and a rotary case 21 that rotates at a constant speed in one direction is supported by the planting case 20. A pair of claw cases 22 are arranged at symmetrical positions in the center, and the planting claws 17 are attached to tips of the claw cases 22.

A support frame 24 is provided on the front side of the planting case 20 via a rolling fulcrum shaft (not shown). The support frame 24 is provided via a link mechanism 27 including a top link 25 and a lower link 26. The link mechanism 27 is connected to the rear side of the traveling vehicle 1. In the link mechanism 27, an elevating cylinder 28 for raising and lowering the planting section 15 is connected to the lower link 26, and the power to the planting section 15 is transmitted through the PTO transmission shaft 40. To be entered via

With such a configuration, the front and rear wheels 6.8
At the same time, the seedlings are taken out from the seedling table 16 which is reciprocally slid right and left by the planting claws 17 so that the planting operation is continuously performed.

Next, various configurations of the planting operation section 51 according to the present invention for controlling the height of the planting section will be described.
First, regarding the arrangement and mounting configuration of the planting operation section 51,
This will be described with reference to FIGS. As shown in FIGS. 2 and 3, a steering shaft 35 is supported by a steering column 34 fixed to the rear portion of the hood 9.
The steering handle 14 is attached to the upper end of the steering shaft 35.
Are connected and fixed, while from the right side of the bonnet 9,
An accelerator lever 31 having a U-shape in a side view for adjusting the rotation speed of the engine 2 is provided in a protruding manner.

Further, an operation panel section 32 provided with a monitor switch, a light switch, and the like is disposed in a rear upper portion of the bonnet 9. The operation panel section 32 is located on the side of the operation panel section 32 inward of the accelerator lever 31. A planting operation section 51 according to the present invention is provided, and a planting operation lever 52 projecting upward from the planting operation section 51 is provided below and close to the steering handle 14. I have.

As described above, the planting operation lever 52 is provided below the steering handle 14 and between the steering handle 15 and the accelerator lever 31 so that the planting operation lever 52 can be moved and planted. In the case of the planting operation in which it is necessary to perform the operation of the steering wheel 14 simultaneously,
With both hands attached to the planting operation lever 52 using fingers.
Can be easily operated, so that the planting operability is greatly improved.

As shown in FIGS. 3 to 5, the periphery of the planting operation section 52 is covered with a case 53.
3 is fixed to an upper end of a support stay 54 via a fixing plate 54a, and a lower end of the support stay 54 has a front frame 38 to which the tilt handle operation lever 33 and the like are connected.
Is fixed to the lower side. A rear portion of the front frame 38 is fixed to a front portion of a right side plate 34a extending laterally from the steering column 34, and a lower side and a front end of the front frame 38 have a Y-shaped reinforcement in side view. Two upper pipes 36a and 3 forming the member 36
6b, the lower pipe 36 of the reinforcing member 36
c is a support member 3a protruding from the body frame 3.
It is fixed to.

At this time, the upper end of the support stay 55 is also fixed to the left side surface of the case 53 via a fixing plate 55a, and the lower end of the support stay 55 is also fixed to the lower pipe 36c.
Along with the lower end, the supporting member 3a is fixed to the side surface by a bolt 39 together.

As described above, the planting operation section 52 has a structure in which the side is supported by the vehicle body frame 3 and the front is supported by the two components of the vehicle body frame 3 and the steering column 34 in two directions, lateral and front. The planting operation section 52 can be securely attached to an appropriate position, and the arrangement of the planting operation lever 52 can be finely adjusted by loosening or tightening the fasteners such as the bolts 39 as necessary. It can be adjusted and can be set in an arrangement configuration in consideration of the physique and habit of the worker.

Next, the operation and internal configuration of the planting operation section 51 will be described with reference to FIGS. 3, 6 to 9. FIG.
As shown in FIG. 6, a guide plate 56 for guiding the planting operation lever 52 is provided on the upper surface of the planting operation section 51 at a low inclination toward the operator. Guide groove 5 for interpolating 52 and guiding to a predetermined operation position
7, the guide groove 57 includes a main groove 57 a that opens linearly forward and backward, a notched sub-groove 57 b that extends rightward from a middle part of the front and rear of the main groove 57 a, and a main groove 57 a. And a sub-groove 57c extending left and right from the front.

As shown in FIG. 7, the guide groove 57 has an upper position 52a for raising the planting portion 15, a lower position 52b for lowering the planting portion 15, and an arbitrary position for moving the planting portion 15 up and down. A neutral position 52d for fixing to a height, a planting position 52c for starting planting work after lowering the planting section 15 (work ON), and releasing the left and right delineated markers and setting them on the field. Marker release positions 52e and 52f
Are provided so that the planting operation lever 52 can be rotated to each operation position.

As described above, the guide plate 56 is disposed so as to be inclined so that the operator side is lower, so that the operation mode can be easily checked, and the neutral position for fixing the planting portion 15 at an arbitrary height. Since the position 52d is arranged in the notch-shaped sub-groove 57b, the planted portion 15 can be securely held at a predetermined height, and is used when traveling on the road or traveling backward as in the present invention. Even if there is, we try not to make a mistake.

A detent mechanism for elastically holding the planting operation lever 52 rotated to each operation position and a detent releasing device for releasing the holding are provided inside the planting operation section 51. An actuator and the like are provided.

First, the detent mechanism 61 will be described. As shown in FIGS. 8 and 9, the lower end of the planting operation lever 52 is fixed to an operation lever shaft 74 pivotally supported by the case 53 with a fixing pin 77. A front portion of a detent cam 65 having a large number of concave portions 65a on its side is externally fitted and fixed so that the detent cam 65 can rotate together with the rotation of the planting operation lever 52. On the other hand, the case 53 includes a lever shaft 73.
The lower end of a detent lever 66 is pivotally supported via the, and the upper end of the detent lever 66 is elastically mounted on the case 53 by a detent spring 70. Detent cam 6
5, the projection of the detent plate 72 is engaged with the recess 65a of the detent cam 65, and the planting operation lever 52
Can be held in each operation position.

That is, since the planting operation lever 52 can be held in each operation position, the current operation mode can be grasped only by visually recognizing the position of the planting operation lever 52, and the operation modes can be quickly and reliably switched. You can make the transition.

The detent lever 66 is connected to the rear end of a release arm 71 via a lever shaft 73, and the front end of the release arm 71 is connected to a long hole 6 opened in a locking member 68.
The locking member 68 is vertically movably connected to a rotating arm 67 fixed to a motor shaft 63a constituting the detent release actuator 63.
On the other hand, the planting operation lever 52 is connected to the case 5 via an operation lever return spring 69 having one end connected to an upper and lower part thereof.
3 It is mounted on the inner wall.

In this configuration, when the detent release actuator 63 is actuated, the locking member 68 is pulled up, and the detent lever 66 is rotated counterclockwise about the lever shaft 73. Recess 65
a is disengaged from the projection of the detent plate 72, the detent mechanism 61 is released, and the planting operation lever 52 is moved by the elasticity of the operation lever return spring 69 to the upper position 52.
a.

A position indicating arm 75 is vertically provided from the operation lever shaft 74, while a potentiometer type operation position detection sensor 62 provided below the case 53 provides a bifurcated side view sensing arm 62a. The sensing arm 62a is extended and engaged with a locking pin 76 projecting from the lower end of the position indicating arm 75. When the planting operation lever 52 is rotated, the sensing arm 62a is also rotated. The operation position detection sensor 62 can detect the current operation position.

As shown in FIGS. 7 to 9, right and left marker releasing switches 43 and 44 are provided below the guide plate 56.
In the planting position 52c, by tilting the planting operation lever 52 to the left or right, one of the left and right switch arms 43a and 44a is pushed,
The marker release switches 43 and 44 are turned on. This allows
At the planting position 52c, it is possible to detect whether the planting operation lever 52 is tilted left or right.

Next, the planting operation control means 47 mainly composed of the planting operation section 51 having the above configuration will be described with reference to FIGS. As shown in FIG.
The planting operation control means 47 includes a switch / sensor section 47a and a drive section 47b.
0 is connected. The switch / sensor unit 47a includes the operation position detection sensor 62, the left and right marker release switches 43 and 44, the reverse detection switch 46,
And a lift sensor 45 for detecting the height of the planting portion. The driving portion 47b includes the lifting cylinder 28, an electromagnetic valve 28a for switching oil pressure to the lifting cylinder 28, and a planting clutch 42. A relay 42a for turning on and off the planting clutch 42, a marker releasing actuator 41a, and the detent releasing actuator 63
It consists of.

As shown in FIGS. 7 and 10, when the planting operation lever 52 is turned to the upper position 52a or the lower position 52b, the controller 30 makes the planting operation based on the detection result of the position detecting sensor 62. Recognizing the current operation position where the attachment operating lever 52 is held, the solenoid of the electromagnetic valve 28a is operated to extend and retract the elevating cylinder 28, and the planting section 15 is raised and lowered. When the predetermined height is reached, the planting operation lever 52 is moved to the neutral position 52d.
When it is rotated up, the elevating cylinder 28 stops expanding and contracting, and the planting portion 15 is held and fixed at that height. When the planting operation lever 52 is rotated further forward than the lower position 52b and held at the planting position 52c, the controller 30 operates the relay 42a to engage the planting clutch 42 to perform the planting operation. So you can get started.

At the planting position 52c, the planting operation lever 52 is tilted to the left or right to move the marker releasing position 52c.
e, 52f, the controller 30
Operates the marker release actuator 41a in the marker release device 41 shown in FIG. As a result, the motor constituting the marker release actuator 41a is operated, the one side marker release wire is slid, and the locking of the drawing marker on the side corresponding to the marker release wire is released.

A reverse detection switch 46 shown in FIG. 1 is provided in the main transmission portion provided with the main transmission lever 5, and the reverse detection switch 46 turns the main transmission lever 5 to the reverse position. It is configured to be "on" when activated,
Based on the “ON” signal, the controller 30 controls the motor,
The detent release actuator 63 composed of a solenoid or the like is operated. Thereby, when the detent mechanism 61 is released as described above, the planting operation lever 52 is rotated to the upper position 52a by the elasticity of the operation lever return spring 69.

That is, the main shift lever 5 is moved to the "reverse position".
Then, the detent mechanism 61 is released, and the planting operation lever 52 rotates to the upper position 52a.
5 can also be raised to perform the same operation as the conventional so-called back interlock. Moreover, since the main transmission lever 5 and the detent mechanism 61 are electrically connected rather than mechanically, the connection structure is extremely simple, the number of parts is small, and the cost of parts and assembly is low. In addition, the operating force of the main shift lever 5 and the like can be reduced, and the operability is greatly improved.

The height of the planting portion 15 is detected by the potentiometer type elevation sensor 45. The elevation sensor 45 is connected to the lower link 2 as shown in FIG.
6 for detecting the amount of displacement of the lower link 26. The controller 30 calculates the height of the planting section 15 based on the detected displacement amount of the lower link 26, and sets a reference height and the like described later.

The control of the height of the planting portion during backward movement by the planting operation control means 47 having the above configuration will be described with reference to FIGS. As shown in FIG. 11, when the main shift lever 5 is set to the "reverse position" and the reverse detection switch 46 is turned "on" (S
1), the controller 30 connected to the reverse detection switch 46 detects "ON" and activates the detent release actuator 63 to release the detent mechanism 61 (S2).

When the controller 30 determines that the elapsed time after the release of the detent mechanism 61 (hereinafter referred to as “release duration”) exceeds the reference time (S
3) The detent release actuator 63 is operated to engage the detent plate 72 with the detent cam 65 so that the planting operation lever 52 can be held at each operation position (S4).

In this state, when the operator rotates the planting operation lever 52 to each operating position, the controller 30 expands and contracts the lifting cylinder 28 based on the detection result of the position detection sensor 62, and 15 can be raised and lowered (S5). The reference time refers to the detent mechanism 6
1 This is the time required for the planting operation lever 52 to rotate to the upper position 52a after the release, and is used as a criterion for determining the lapse of the release continuation time, and is set to a fixed time.

That is, the main shift lever 5 is moved to the "reverse position".
Then, the detent mechanism 61 is released, and the planting operation lever 52 is rotated to the upper position 52a and the planting portion 15 is raised, but immediately after the reference time, the detent mechanism 61 is released.
Is reactivated and the planting operation lever 52 becomes usable, and the planting operation lever 52 is operated to set the planting portion 15 to an appropriate arbitrary height. It can be done quickly.

Another embodiment in which the release continuation time is obtained from another criterion will be described with reference to FIG. When the main shift lever 5 is set to the "reverse position" and the reverse detection switch 46 is turned on (S6), the controller 30 connected to the reverse detection switch 46 detects "on" and moves up and down. The height of the planting portion 15 is calculated based on the displacement amount of the lower link 26 detected by the sensor 45, and the height of the planting portion 15 at this time is stored in a memory as a reference height (S7). Then, the detent release actuator 63 is operated to release the detent mechanism 61 (S
8).

Then, the planting operation lever 52 is rotated to the upper position 52a by the operation lever return spring 69, and the controller 30 raises the planting section 15 based on the detection result of the position detection sensor 62. Issue a command,
The reference height is read from the memory and compared with the height of the planting portion 15 (hereinafter referred to as “planting height”) to determine whether the planting height has risen to a position higher than the reference height. (S
9).

When the controller 30 determines that the planting height has risen to a position higher than the reference height, the detent release actuator 63 is operated to engage the detent plate 72 with the detent cam 65. , So that the planting operation lever 52 can be held at each operation position (S
10).

That is, since the planting operation lever 52 can be used only after confirming that the planting section 15 is actually in the ascending state, the raising / lowering cylinder can be used even though the reference time has elapsed. Even if the planting unit 15 is not in the raised state due to the variation in performance or the like of 28, the trouble that the planting unit 15 is lowered or planted due to erroneous operation of the planting operation lever 52 and the like is completely damaged. Can be prevented. In addition, by adopting such a configuration, the time until the planting section 15 shifts to the rising state can be set to the shortest time, so that the planting height can be adjusted more quickly.

[0047]

The present invention is configured as described above.
The following effects are obtained. That is, the operation lever is disposed on the planting operation section and a holding mechanism capable of rotating and releasing the operation lever is provided, while the operation lever is set to the “up position” of the planting section. The "lower position", "neutral position", "planting position" where planting work is ON, and "marker release position" for releasing the drawing marker can be held. Is provided, and the reverse detection means and the holding mechanism are connected and interlocked with each other, and the holding mechanism is released when the vehicle reverses, so that the planting operation lever can be held at each operation position, After changing the operation mode, unlike the conventional planting operation lever, it does not immediately return to the neutral position and the operation mode becomes difficult to understand. Can be grasped, and quickly between operation modes One can be reliably proceeds.

Further, even in the case where the vehicle travels backward in order to change directions at the edge of a ridge or the like, the holding mechanism is released simultaneously with the start of the reverse movement to bring the planting section up, and the planting operation lever is provided. The height of the planting part can be easily and quickly adjusted, so that the planting part does not obstruct the field of view and allows the driver to drive backward while checking the rear, greatly improving driving operability. be able to. In this case, since the connection and interlocking mechanism between the start of reverse movement and the rise of the planting section is electrically controlled, the number and types of components are smaller and the cost of parts and assembly is lower than in the conventional mechanical connection. Therefore, the operation force can be reduced, and the planting operability can be improved. Further, each device can be made compact to promote the miniaturization of the body.

Since the release of the holding mechanism is continued for a set time as in claim 2, the planting operation lever can be operated after the planting section is shifted to the up state, so that the reverse movement is performed. It is possible to prevent troubles such as breakage of the planting portion due to lowering or planting operation during traveling.

According to a third aspect of the present invention, the release continuation time of the holding mechanism according to the first aspect is a time until the height of the planted portion becomes higher than the height of the planted portion when the main shift is switched to the reverse. Since the setting, the planting operation lever can be operated when it is confirmed by the elevation sensor that the planting section actually rises, so that the release duration can be set to the shortest time, and the planting height can be set more quickly. You can start adjusting the height.

[Brief description of the drawings]

FIG. 1 is an overall side view of a riding rice transplanter.

FIG. 2 is a perspective view of a body front portion having a planting operation section according to the present invention.

FIG. 3 is a partial cross-sectional side view of a front portion of the fuselage showing an attachment configuration of the planting operation section.

FIG. 4 is a front view of a planting operation unit.

FIG. 5 is a plan view of the same.

FIG. 6 is a plan view showing the shape of a guide groove.

FIG. 7 is a plan view showing the correspondence between the position of the planting operation lever and the operation mode.

FIG. 8 is a partial side sectional view showing a holding mechanism.

FIG. 9 is a partial front sectional view of the same.

FIG. 10 is a control block diagram showing planting operation control means.

FIG. 11 is a flowchart of planting portion height control.

FIG. 12 is a flowchart of another embodiment of planting portion height control.

[Explanation of symbols]

 15 Planting part 51 Planting operation part 52 Planting operation lever 52a “Up position” 52b “Down position” 52c “Planting position” 52d “Neutral position” 52e / 52f “Marker release position” 61 Holding mechanism 62 Reverse detection means

 ──────────────────────────────────────────────────の Continued on the front page F term (reference) 2B043 AA01 AB11 BA02 BB06 CA03 CB05 2B062 AA02 AA14 AB01 BA22 BA24 CA05 CA12 CA14

Claims (3)

[Claims] An operation lever is disposed on a planting operation section, and a holding mechanism capable of rotating and releasing the operation lever is provided. On the other hand, the operation lever is moved to an "up position" or "down position" of the planting section. "Neutral position", "planting position" of planting work ON, and "marker release position" to release the drawing marker
The main transmission portion is provided with reverse detection means for detecting switching of the main transmission to reverse, and the reverse detection means and the holding mechanism are connected and interlocked with each other, and the holding mechanism is released when the vehicle reverses. A planting section position control mechanism for a rice transplanter. 2. The planting part position control mechanism of a rice transplanter according to claim 1, wherein the release of the holding mechanism is continued for a set time. 3. The release duration of the holding mechanism is set to a time until the height of the planted portion becomes higher than the height of the planted portion when the main shift is switched to reverse. 2. The planting section position control mechanism of the rice transplanter according to 1.