JP2000139140A - Moving agricultural machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a moving agricultural machine capable of automatically lifting a planting section, when a planting switch is switched on and when a speed change operation lever is switched to a backward movement. SOLUTION: In this sulky transplanter 1, the forward or backward movement of a travel frame 5 and a speed change operation can be switched by the operation of a speed change lever 41, and the sulky transplanter 1 is provided with a backup function for automatically lifting a planting portion 11, when the speed change operation lever 41 is switched to a prescribed position. Namely, when a planting switch 83 is switched on a planting work, various monitors and a warning device are operated. When the planting switch 83 is switched on and when the speed change operation 41 are switched to a backward movement, the planting section 11 is automatically lifted. Thereby, when the speed change operation lever 41 is switched to the backward movement at a time except a planting work, the so-called backup function is not operated, because the planting switch 83 is not switched on.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile agricultural machine such as a rice transplanter for riding, and more particularly to a mobile agricultural machine in which a working unit can be automatically raised by switching a shift operation lever to a reverse position.

[0002]

2. Description of the Related Art In a riding rice transplanter in which seedlings are planted while traveling on a self-propelled basis, there is one in which switching between forward and backward traveling in the traveling direction of a traveling machine body and shifting operations for forward and backward traveling are each performed by a single shift operation lever. This shift operation lever is known, for example, disposed on the side of the steering wheel so as to extend upward from a step below the driver's seat. While operating the steering wheel, the driver gently grasps the tip of the shift operation lever and swings left and right with respect to the traveling direction to enable switching between forward and backward movement, while swinging forward and backward to achieve high speed and high speed. The gear can be shifted to a low speed.

[0003] Conventionally, when the traveling body is moved backward in a field, the planting section supported to be able to move up and down on the traveling body comes into contact with a ridge or the like and is damaged, or the seedlings already planted by the planting section. Because there is a risk of being knocked down,
Normally, a so-called backup function (shift operation) is performed by switching the shift operation lever to reverse after raising the planted portion, or by switching connection / disconnection of a terminal provided near the mounting position of the microcomputer. ON / OFF of the function of automatically raising the planted portion based on the switching operation of the lever to the backward movement) can be switched.

[0004]

However, after the work is performed in a state in which the plug terminal is connected (the backup mode is ON), the riding rice transplanter is stored backward in a place where the planting section cannot be raised to the highest position. In such a case, there is a risk that the backup function will operate while the plug terminal is connected, and the planting portion will rise and collide with another member or break it. On the other hand, in order to avoid this, there is a problem that it is troublesome for the driver to switch the connection / disconnection of the terminal each time.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to switch a working portion to a reverse operation of a speed change operation lever only when a work machine switch is in an ON operation state. An object of the present invention is to provide a mobile agricultural machine that can be automatically raised based on an operation.

[0006]

In order to achieve the above object, an invention according to claim 1 is characterized in that a shift operating lever (41) capable of switching between forward and backward traveling and shifting operation of a traveling body (5); (5) The working unit (1) supported to be able to move up and down
1) The mobile agricultural machine (1), which is capable of automatically raising and lowering the working unit (11) based on a predetermined switching operation of the speed change operation lever (41), is operated at the time of work and various monitors and alarms. A work implement switch (83) for activating the device; and only when the work implement switch (83) is in the on-operation state, the work part (11) is moved backward of the speed change operation lever (41). The ascent operation can be automatically performed based on a switching operation.

The invention according to claim 2 is characterized in that the working portion (11) can be automatically raised after a predetermined time has elapsed since the shift operation lever (41) is switched to reverse. And

According to a third aspect of the present invention, there is provided a back alarm which is activated by a shift operation of the speed change operation lever (41) to reverse, and an abnormality alarm which is activated when an abnormal state occurs during work. The alarm and the abnormal alarm are different alarms.

[Operation] Based on the above-mentioned specific features of the invention, the mobile agricultural machine (1) according to the present invention includes the working unit (11) supported on the traveling machine body (5) so as to be able to move up and down, and the shift operation lever ( 41), the forward and backward switching of the traveling body (5) and the speed change operation are enabled, and based on a predetermined switching operation of the speed change operation lever (41), the working unit (1) is operated.
1) is provided with a so-called backup function that automatically raises the operation. That is, in the present invention, there is provided a work implement switch (83) for turning on various monitors and alarm devices by being turned on at the time of work, and the work implement switch (83) is operated to be turned on, In addition, the working section (11) is automatically raised based on switching operation of the speed change operation lever (41) to reverse. As a result, even if the shift operation lever (41) is switched to the reverse movement except during the operation, the work implement switch (83) is in the off state, so that the so-called backup function does not operate.

The reference numerals in parentheses are for the purpose of comparison with the drawings, but do not limit the present invention.

[0011]

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

As shown in FIG. 1, the riding rice transplanter 1 has a traveling machine body 5 supported by a front wheel 2 and a rear wheel 3, and an engine 6 and a transmission case are provided at the front of the machine body 5. 7, a driver's seat 9 having a seat 8 is arranged at the rear. Behind the traveling machine body 5, a planting section 11 is supported by a hydraulic cylinder device 16 via a link mechanism 10 so as to be able to move up and down.
1 includes a seedling mounting table 12, a planter 13, a float 15, and the like.

As shown in FIG. 2, a display panel 80 disposed in front of the driver's seat 9 is provided with various monitor display sections 81 for warning about a remaining fuel amount and warning for seedling replenishment. A key switch 8 is provided in front of and below the display panel 80.
2 and a planting switch 83 that is turned on during the planting operation to activate various monitors and alarm devices.

As shown in FIG. 3, the output shaft 6 of the engine 6
and a transmission input shaft 7a protruding from the transmission case 7, a belt-type continuously variable transmission mechanism 17 is disposed. From the portion of the continuously variable transmission mechanism 17 toward the driver's seat 9 above, The speed change lever 41 is extended.
When the shift operation lever 41 is operated in the left-right direction of the vehicle, the forward / backward movement of the traveling vehicle 5 is switched, and when the transmission operation lever 41 is operated in the forward-backward direction of the vehicle, the traveling vehicle 5 is continuously and rapidly driven at high speed and low speed respectively. It is shifted.

3 and 4, a forward / reverse switching shaft 19 extends vertically in the side of the transmission case 7, and its upper and lower ends are substantially U-shaped when viewed from the front. It is rotatably supported by a mounting plate 52 that is bent into a shape. The upper end of the mounting plate 52 is formed on a guide plate 52a as a guide member, and the guide plate 52a has a substantially U-shaped guide groove 5a.
5 (see FIG. 2).

The guide groove 55 is provided with left and right grooves 55a for guiding the right and left swing of the operating rod 46 fixed integrally with the shift operation lever 41, and the front and rear of the operating rod 46 at both ends of the left and right grooves 55a. It is formed in a U-shape by combining two front and rear grooves 55b, 55b for guiding the swing in the direction. By operating the shift operation lever 41, the traveling of the traveling body 5 is switched between forward and backward and a shift operation is performed.

A switching plate 54 is attached to the upper end of the forward / reverse switching shaft 19 so as to be rotatable integrally with the switching shaft 19. This switching plate 54 includes
As shown in FIG. 5D to be described later, a cutout groove 54a is formed on the rotation end side, and the base end of the speed change operation lever 41 is inserted into the cutout groove 54a. Further, a shift arm 5 is provided at the lower end of the forward / reverse switching shaft 19.
6 is fixed integrally with the switching shaft 19,
The shift arm 56 can operate a forward / reverse switching gear built in the transmission case 7 to switch between forward, neutral, and reverse.

That is, in FIGS. 5 (a) to 5 (d),
When the shift operation lever 41 is operated in the left direction (reverse), the switching plate 54 is also moved forward and backward in response to this operation.
5 (see FIG. 5 (a)), and when the shift operation lever 41 is operated rightward (forward), the switching plate 54 is also rotated in the same direction (FIG. 5 (a)). Further, when the shift operation lever 41 is further operated to the neutral position (neutral), the switching plate 54 is also operated to the neutral position (FIG. 5).
(C)). The switching plate 54 is formed with the above-described notch groove 54a (see FIG. 5D).

5 (a) to 5 (d), a detection switch (limit switch) 26 is attached to the guide plate 52a by a bolt 27 at a position close to the left turning end of the switching plate 54. When the shift operation lever 41 is operated to the left (reverse), the switching plate 54 rotates in the same direction about the forward / reverse switching shaft 19, and the end surface 54 b of the switch plate 54 is connected to the sensor bar of the detection switch 26. 26a, the detection switch 26 is turned on.

When the shift operation lever 41 is operated in the left direction (reverse), the shift operation lever 41 is operated in the front-rear direction (high speed / low speed) in order to shift the traveling body 5.
Even if it does, the detection switch 26 is kept in the ON operation state. On the other hand, as shown in FIGS. 5B and 5C, when the shift operation lever 41 is operated to the right (forward) or the neutral position (neutral), the switching plate 54
6, the detection switch 2
6 is off. In these positions, the traveling vehicle 5
Even if the shift operation lever 41 is operated in the front-rear direction (high speed / low speed) in order to perform the speed change operation, the detection switch 26 is not affected.

With this detection switch 26, it is possible to reliably detect that the shift operation lever 41 has been operated to the reverse position. Therefore, for example, the detection switch 26
For example, an alarm buzzer can be sounded to notify that the shift operation lever 41 is at the reverse position on condition that the vehicle is turned on (reverse).

Next, the transmission including the transmission operation lever 41 will be briefly described.

3 and 4, the belt-type continuously variable transmission mechanism 17 has a driving pulley 22 mounted on the engine output shaft 6a and a driven pulley 23 mounted on the transmission input shaft 7a. And V
A belt 24 is wound. The shift operation lever 4
1 is a bracket 42a, 4
A lever boss 41a is supported on a shaft 43 fixedly mounted through the shaft 2b so as to be swingable in the longitudinal direction of the body, and a pin 44 and a plate 44a integrated therewith are mounted on the lever boss 41a.
And a lever main body 41b which is swingably supported in the lateral direction of the machine.

A plate 45 is fixed to a root portion of the lever main body 41b, and the pin 44 is supported on the plate 45, and an operating rod 46 is hung downward. A pin 46a is attached to the tip of the operating rod 46. This pin 4
6a is engaged with the guide groove 55 formed in the guide plate 52a described above. Then, as the operating rod 46 moves left and right along the left and right grooves 55a of the guide groove 55, the tip switches the transmission case 7 between the forward side and the reverse side. Further, as the operating rod 46 moves along the front and rear grooves 55b of the guide grooves 55, the operating arm 41c swings back and forth to switch the continuously variable transmission mechanism 17 to move forward at high speed.
It realizes low-speed forward, high-speed reverse, and low-speed reverse.

The lever boss 41a of the operation lever 41
Has an operation arm 41c extending from the shaft 43.
Reference numeral 0 denotes a tight pulley for applying a predetermined tension to the belt 24 of the continuously variable transmission. Reference numeral 62 denotes a tight arm rotatably supported by the pin and supporting the tight pulley 60 at one end.

On the other hand, a sector-shaped positioning plate 66 is integrally fixed to the lever boss 41a, and a large number of uneven portions are formed at the tip of the plate 66. Further, a roller 69 is rotatably supported at an intermediate portion of the arm 67 which is swingably supported by the fixed frame, and a spring 70 is stretched at a distal end portion thereof. Then, the roller 69 is pressed by the urging force based on the spring 70 so that
And the operation lever 41 and the continuously variable transmission mechanism 17 are positioned and held at a predetermined transmission operation position.

Here, according to the present invention, only when the work implement switch (planting switch) 83 is in the ON operation state, the work unit 11 is automatically turned on based on the operation of switching the speed change operation lever 41 to the reverse. Ascent operation is possible.

In the present embodiment, in addition to the ON / OFF setting of the backup function by connection / disconnection of the plug terminal provided near the mounting position of the microcomputer, only when the planting switch 83 is in the ON operation state. The backup function is activated by the reverse operation of the shift operation lever 41.

That is, since the planting switch 83 is not turned on except during the planting operation, the planting portion 11 is connected even if the plug terminal is connected and the speed change operation lever 41 is switched to reverse in this state. Does not rise automatically. Thus, for example, when the body is stored, the planting switch 83 is turned off, and therefore, even if the shift operation lever 41 is switched to reverse, the planting portion 11 does not automatically move up. Therefore, interference with other members due to the rise of the planting portion 11 is avoided.

FIG. 6 shows a control flowchart at this time.

In FIG. 4, in S1, it is determined whether the backup mode is ON / OFF due to connection / disconnection of the plug terminal. If the backup mode is ON, S1 is executed.
In step 2, ON / OFF of the planting switch 83 is determined. If the planting switch 83 is ON, the hydraulic pressure state (hydraulic valve position) is determined in S3. In the case of OFF in S1 and S2, the process returns to the first step. If the hydraulic pressure state is other than "lower" or "planting" in S3, the process returns to the first step. If the hydraulic pressure state is "lower" or "planting", the back detection switch 26 is turned on in S4. Is determined as ON / OFF. In this S4, if the back detection switch 26 is OFF, the process returns to the beginning, and if the switch 26 is ON, the process proceeds to S5, where ON / OFF of the previous back detection switch 26 is determined. Then, if the previous back detection switch 26 is ON, the process returns to the first step, and if OFF, the hydraulic pressure state is set to “increase” in S6 and the planting section 11 is raised.

In the present embodiment, the planting section 11 may be automatically raised after a predetermined time has elapsed since the shift operation lever 41 was switched to reverse. That is, for example, the planting switch 83 is turned on.
In the operated state, if the planting section 11 is immediately raised by switching the shift operation lever 41 to the reverse, the shift operation lever 41 is operated from “forward” to “neutral (N)”. If the operator mistakenly operates the "reverse", the planting unit 1
1 will automatically rise. Therefore, when the planting switch 83 is ON and the shift operation lever 41 is switched to reverse, the backup function is activated only when the shift operation lever 41 is held at the "reverse" position for a predetermined time. I did it.

Further, when the planting switch 83 is ON and the shift operation lever 41 is switched to reverse, the planting section 11 is immediately raised and the shift operation lever 41 is set to "reverse" for a predetermined time. Only when held at the position, the mode in which the planting portion 11 is raised may be selectively switched.

FIG. 7 is a diagram showing a control flowchart at this time.

To explain this briefly, as described above,
In S11, ON / OFF of the planting switch 83 is determined, and
If the hydraulic pressure state is "lower" or "planting" after determining the hydraulic pressure state in 12, it is determined in S13 whether the backup mode is "1", "2", or "OFF". If the backup mode is “1”, S13 → S19 → S20 →
In the route of S18, as soon as the planting switch 83 is turned on and the shift operation lever 41 is switched to reverse, the planting portion 11 is immediately raised, and the backup mode is set to "2".
Then S13 → S14 → S15 → S16 → S17 → S18
When the planting switch 83 is turned on and the shift operation lever 41 is held in reverse for a predetermined time, the planting unit 11
Is raised. In S14, the back detection switch 26
Is OFF, the backup mode is released in S21.

Next, a back alarm that activates an alarm sound when the shift operation lever 41 is switched to reverse and an abnormal alarm that activates an alarm sound when an abnormal condition occurs during planting will be described.

First, the present invention includes a back alarm which is activated by a shift operation of the speed change operation lever 41 to reverse, and an abnormality alarm which is activated when an abnormal state occurs during work.
These back alarms and abnormal alarms are different alarms.

That is, the rice transplanter 1 of this type is generally provided with an alarm buzzer 84 (see FIG. 1) for activating an alarm when an abnormal condition occurs at the time of planting, at a position in front of the driver's seat 9 or the like. ing. However, since the back warning is not provided when the aircraft is moving backward, if a back warning is provided in consideration of safety, if a new buzzer or the like is attached to distinguish the back warning from the abnormal warning, the cost will increase. . Therefore, by also using the alarm buzzer 84, the back alarm and the abnormal alarm are the same sound source, for example, the back alarm is an intermittent sound, the abnormal alarm is a continuous sound, and the like.
We decided to make a distinction by changing the sounding method.

It is to be noted that the types of alarms include, in addition to the back alarm, a hydraulic / planting lever (not shown) for controlling the raising and lowering of the planting section 11 when the predetermined "fixed" position is not operated. It is also conceivable to provide a lever alarm that disables the raising / lowering control of the planting unit 11 and the on / off operation of the planting clutch, and at the same time sounds an alarm sound.

FIGS. 8A to 8C are diagrams showing an embodiment of the above-described method of sounding the lever alarm, the back alarm, and the abnormality alarm.

[0041] In this case, the lever alarm is short tone bursts of ON time longer OFF time (see FIG. 8 (a)), a back alarm ON time and the OFF time is long and simple intermittent sound of the period T ₁ Yes (see Fig. 8 (b)), abnormal alarm is ON
Time is how sound sounded a shorter intermittent sound period T ₂ (see FIG. 8 (c)). In this case, it is set to a period T ₁ of the back alarm and the period T ₂ of the alarming in a substantially equal.

FIGS. 9A and 9B are diagrams showing another embodiment of the method of sounding the back alarm and the abnormal alarm.

In this embodiment, the back alarm period T
₁ and a period T ₂ of the error alarm are set to different values.

FIGS. 10A and 10B are diagrams showing still another embodiment of the method of sounding the back alarm and the abnormal alarm.

In this embodiment, the back alarm period T
₁ and the abnormality alarm period T ₂ are made equal, and the duty ratios d ₁ / T ₁ and d ₂ / T ₂ of the ON time and the OFF time in the back alarm and the abnormality alarm are changed.

[0046]

According to the first aspect of the present invention, only when the work implement switch is in the ON state, the working portion can be automatically raised based on the operation of switching the speed change operation lever to reverse. Therefore, even if the shift operation lever is operated backward when the vehicle is not working, the so-called backup function does not operate.For example, when the vehicle is retracted by operating the vehicle backward, the working unit is automatically raised. Therefore, it is possible to prevent interference with other members due to the rise of the working section.

According to the second aspect of the present invention, the work section can be automatically raised after a predetermined time has elapsed since the shift operation lever was switched to reverse, so that, for example, the shift operation lever was erroneously moved backward. Even if the switching operation is performed, the so-called backup function can be prevented from being operated by immediately re-operating the operation lever to the correct position.

According to the third aspect of the present invention, the back alarm which is activated by the shift operation of the shift operation lever to the reverse movement and the abnormal alarm which is activated when an abnormal state occurs during the operation are different alarms. It is possible to identify whether the alarm is a back alarm or an abnormal alarm according to the issued alarm.

[Brief description of the drawings]

FIG. 1 is a side view of a riding rice transplanter to which the present invention is applied.

FIG. 2 is a diagram illustrating an arrangement state of a monitor display unit on a display panel in front of a driver's seat.

FIG. 3 is a side view of a continuously variable transmission mechanism and a transmission case.

FIG. 4 is a partial front view of the same.

FIG. 5A is a plan view showing the position of the switching plate when moving backward, FIG. 5B is a plan view showing the position of the switching plate when moving forward,
(C) is a plan view showing the position of the switching plate at the time of neutral, (d)
FIG. 4 is a plan view showing an outer shape of a switching plate.

FIG. 6 is a diagram showing a control flowchart relating to a backup operation.

FIG. 7 is a diagram showing a control flowchart of another embodiment relating to a backup operation.

FIGS. 8A to 8C are diagrams illustrating an embodiment of a method of sounding a lever alarm, a back alarm, and an abnormality alarm, respectively.

FIGS. 9A and 9B are diagrams showing an embodiment of a method of sounding a back alarm and an abnormal alarm.

FIGS. 10A and 10B are diagrams showing an embodiment of a method of sounding a back alarm and an abnormal alarm.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Riding rice transplanter 5 Running body 10 Link mechanism 11 Implantation part 17 Belt-type continuously variable transmission mechanism 26 Detection switch 41 Speed change operation lever 46 Operating rod 52a Guide plate 54 Switching plate 55 Guide groove 80 Display panel 81 Monitor display part 83 Planting Switch 84 alarm buzzer

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Chie Mizutani 667 Idai-cho, Oji-machi, Higashi-Izumo-cho, Yatsuka-gun, Shimane 1 F-term in Mitsubishi Agricultural Machinery Co., Ltd. (Reference) 2B062 AA03 AA11 AB01 BA24 BA26 BA62 CA05 CA15 2B304 KA17 LA02 LA09 LB05 LB16 LC04 MA02 MB02 MC12 MD03 PA01 QA05 RA27 RB02

Claims (3)

[Claims] 1. A shift operation lever capable of switching between forward and backward movement of a traveling body and performing a shift operation, and a working portion supported by the traveling body so as to be able to move up and down, the work being performed based on a predetermined switching operation of the shift operation lever. The mobile agricultural machine, which is capable of automatically raising and lowering a part, comprises a work equipment switch which is operated at the time of work to activate various monitors and an alarm device, and only when the work equipment switch is in an ON operation state, A mobile agricultural machine, wherein a working unit can be automatically raised based on a switching operation of the speed change operation lever to reverse. 2. The mobile agricultural machine according to claim 1, wherein the working unit can be automatically raised after a predetermined time has elapsed since the shift operation lever was switched to reverse. 3. A back alarm which is activated by a shift operation of the shift operation lever to reverse, and an abnormality alarm which is activated when an abnormal state occurs during work, wherein the back alarm and the abnormal alarm are different alarms. The mobile agricultural machine according to claim 1, wherein: