JP2000232807A - Fall preventing mechanism for rice tansplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically lower a planting part and to avoid the fall of a rice transplanter when it is inclined in a set range or larger than it since conventionally, when the rice transplanter was inclined more than a safety range, only an alarm system has been operated and an operator has had to avoid the fall by himself. SOLUTION: An inclination sensor 55 is placed on a rice transplanter of sulky rice transplanter. When the rice transplanter is inclined in a set angle or larger than it, and alarm is raised by a signal from the inclination sensor and simultaneously a lifting and lowering valve 50 is operated to a lowering side to drop a planting part. The inclination sensor is connected to a control means 41. An actuator 59 capable of sliding a spool 61 of the lifting and lowering valve 59 is arranged and the actuator 59 is connected to the control means. When the detected value of the inclination sensor 55 exceeds a set range, the lifting and lowering valve is changed to a lowering side by the actuator 59.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology for arranging an inclination sensor on a main body of a riding rice transplanter, and lowering the planting portion when the inclination is more than a set angle to avoid falling.

[0002]

2. Description of the Related Art Conventionally, there has been known a technique in which an inclination sensor is disposed on the main body side of a riding rice transplanter so that an alarm is issued when the inclination sensor is inclined beyond a set angle. For example, this is a technique disclosed in Japanese Patent Application Laid-Open No. 10-164927. This technique detects the inclination of the traveling body in all directions in the front, rear, left and right directions with respect to the horizontal plane, and notifies the occupant that the vehicle is out of a safety reference range in each direction.

[0003]

However, in the above-mentioned technology, a warning device such as a buzzer or a lamp merely informs the operator of the possibility of falling, so that an operation for avoiding falling is performed. It must be done by the operator himself. On the other hand, when the rice transplanter is not working, the planting portion is in a raised state, so that the center of gravity is higher by the weight of the plant. Therefore,
If the planting part is lowered when the aircraft is tilted to near the falling angle, the center of gravity is lowered, and the falling can be avoided. Therefore, to avoid falling when the aircraft is tilted beyond the set range,
It is desirable to stop the airframe and lower the planting section. However, it was very difficult to do more than one operation at a time when the aircraft was tilted. Therefore, the present invention seeks to provide a technique for automatically lowering the planting section when the apparatus is tilted beyond a set range to avoid tipping over.

[0004]

The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described. That is, a tilt sensor is arranged on the main unit of the riding rice transplanter, and when the main unit is tilted by a set angle or more, an alarm is issued by a signal from the tilt sensor, and at the same time, the elevating valve is operated to the lower side to lower the planting section. I did it.

In addition, an inclination sensor is arranged on the main body of the riding rice transplanter to be connected to the control means, and an actuator is provided for slidably moving a spool of an elevating valve for controlling the elevating of the planting portion. Was connected to the control means, and when the detected value of the tilt sensor exceeded a set range, the actuator was controlled to switch the elevating valve to the descending side.

[0006]

Next, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is an overall side view of a rice transplanter equipped with a fall prevention mechanism of the present invention, FIG.
3 is a control block diagram and a hydraulic circuit diagram, FIG. 4 is a diagram showing an operation unit of a control valve, and FIG. 5 is a sectional view of a hydraulic pump driving unit.

First, the overall configuration will be described with reference to FIGS. The traveling body 1 serving as the riding rice transplanter has a pair of left and right front wheels 11 supported on a front portion of a body frame 10 via an axle case, and a pair of left and right rear wheels 12.
12 is supported via a rear axle case. An engine 4, a battery, a fuel tank, and the like are placed on the front of the body frame 10 and covered with a bonnet 13, and a steering handle 15 projects on a dashboard 14 behind the bonnet 13. An accelerator lever 16 is disposed on the right side (in the traveling direction) of the dashboard 14, and the left and right brake pedals 1
7L and 17R are arranged, and a clutch pedal 18 is arranged on the left step.

A seat 2 is provided on the rear of the body frame 10.
0 is arranged, a planting portion elevating lever 21 is arranged on the right side of the seat 20, a sensitivity adjusting lever 22 is arranged at a rear portion thereof, and a speed change lever 23 is arranged on the left side.

The planting section 2 is attached to the rear of the body frame 10 via a lifting link mechanism 3. The planting section 2 can be moved up and down by expanding and contracting a hydraulic cylinder 5 provided at the base of the lifting link mechanism 3 (below the seat 20). In the planting section 2, a planting drive case 24 is rotatably mounted on a rear portion of the elevating link mechanism 3 via a hitch, and a plurality of transmission cases 25 protrude from the rear portion of the planting drive case 24. The transmission case 25 is provided with rotary type planting claws 26. Also, a nursery stand rail is provided on the rear part of the planting drive case 24 to
7 is mounted so as to be slidable left and right, and a side float 28 and a center float 29 are arranged below the planting drive case 24.

Next, the configuration of the hydraulic circuit will be described. FIG.
As shown in FIG. 3, an output pulley 6 for transmitting power to a transmission case and a drive split pulley 33 of a split pulley type continuously variable transmission 31 are mounted on an output shaft 30 of the engine 4. The hydraulic pump 32 is driven via the transmission 31. As shown in FIG. 5, the split pulley type continuously variable transmission 31 includes a drive split pulley 33.
And a driven split pulley 35 and a belt 36, and a drive split pulley 33 is mounted on the output shaft 30. The drive split pulley 33 includes a fixed pulley 33a and a sliding pulley 33b. The fixed pulley 33a is fixed on the output shaft 30, and the sliding pulley 33b is connected to the output shaft 30.
The upper portion is slidably fitted on the upper side so as to be slidable in the axial direction, and is urged by a spring 34 toward the fixed pulley 33a.

The driven split pulley 35 constituting the split pulley type continuously variable transmission 31 comprises a fixed pulley 35a and a sliding pulley 35b. The fixed pulley 35a is fixed on a pump shaft 37, and the sliding pulley 35b is fixed. The sliding pulley 35b is fitted on the boss (or the pump shaft 37) of the pulley 35a so as to be slidable.
The lever 39 is slidable by the rotation of the accelerator lever 1 via a transmission mechanism such as a wire or a link.
6. However, it is also possible to arrange the lever 39 on the drive split pulley 33 side and the spring 34 on the driven split pulley 35 side. And the accelerator lever 16
When the rotation speed is low, the pulley width of the driven split pulley 35 is increased, so that the driving speed of the hydraulic pump 32 is increased. When the accelerator lever 16 is rotated and the engine 4 is rotating at a high speed, the pulley width is reduced. The drive speed of the hydraulic pump 32 is configured to be low.

With this configuration, when the rotation speed of the engine 4 is low, the speed of the pump shaft 37 is changed by the split pulley type continuously variable transmission 31 so as to increase the rotation speed, and the rotation speed of the engine 4 is reduced. When the speed is high, the speed is changed so that the rotation of the pump shaft 37 becomes low. Thus,
The rotation speed of the pump shaft 37 is made substantially constant. Therefore, the pump shaft 37 is driven at a substantially constant rotational speed regardless of the level of the rotational speed of the engine 4, and a substantially constant amount of pressure oil is constantly discharged from the hydraulic pump 32. When ascending or rolling, it can be operated at a substantially constant speed, so that it is possible to prevent a thrust, a hunting, and the like due to a control delay.

However, as shown in FIG. 3, the width of the split pulley is adjusted by an actuator 40 such as a cylinder or a solenoid.
The actuator 40 may be connected to a controller 41 serving as control means, and the rotational speed of the engine 4 may be detected by a sensor 42, and the sensor 42 may be connected to the controller 41. By operating the actuator 40 in accordance with the detection value of the sensor 42, the engine 4 can be configured to shift to a low speed side when the engine speed is high and to a high speed side when the engine speed is low as described above. It is.

As shown in FIG. 3, a flow divider 45 is connected to the discharge side of the hydraulic pump 32, and one of the flow dividers 45 is connected to a power steering cylinder 47 via a power steering hydraulic valve 46. Oil can be supplied to the lifting hydraulic cylinder 5 via the lifting valve 50 and driven, and the other can be supplied to the rolling cylinder 52 via the rolling valve 51 and driven.

Next, a fall prevention mechanism of the present invention will be described. An inclination sensor 55 and a controller 41 are arranged at an arbitrary position of the traveling machine body 1. In this embodiment, the inclination sensor 55 and a buzzer or a lamp are arranged near the seat 20 as shown in FIG. And a setting device 57 for setting the inclination angle of the safety range, and an actuator 5 such as a cylinder or a solenoid.
9 is connected.

As shown in FIG. 4, the actuator 59 is arranged so that the piston 59a of the actuator 59 is connected to the spool 61 of the elevating valve 50, and by operating the actuator 59, the piston 59a is contracted. Thus, the spool 61 is slid to switch the elevating valve 50 down.

The planting portion elevating / lowering lever 21 and the valve arm 62 are further disposed at the tip end of the spool 61. The rotation of the planting portion elevating / lowering lever 21 causes the spool 61 to rotate.
To switch the elevating valve 50,
The valve arm 62 is connected via a wire 63 to a planting depth detecting unit 64 disposed in front of the center float 29, and the up / down valve 50 is switched by vertically rotating the front part of the center float 29 to switch the planting unit 2. The planting depth is adjusted so that the planting depth is constant. Also,
In order to adjust the sensitivity of planting depth detection, the end of the outer 65 of the wire 63 is connected to the sensitivity adjustment lever 22 via a link or the like, and the sensitivity can be changed by turning the sensitivity adjustment lever 22. And

With this configuration, the inclination sensor 55 detects the inclination of the apparatus, and the controller 4
1 and is compared by the controller 41 with the set angle. Then, when traveling on a slope, entering a field, crossing a ridge, loading or unloading a truck or the like for movement, the machine tilts, and the value from the tilt sensor 55 is If the setting range is exceeded, a signal is sent from the controller 41 to the alarm device 56 to issue an alarm, and at the same time, a drive signal is sent from the controller 41 to the actuator 59 to be activated. Then, the piston 59a pulls the spool 61 of the elevating valve 50 to switch to the descending side, the hydraulic oil in the hydraulic cylinder 5 is drained through the elevating valve 50, the hydraulic cylinder 5 is extended, and the planting portion 2 is moved. The aircraft descends, and the center of gravity of the entire aircraft lowers to avoid falling. It should be noted that a warning may be issued in two stages so that a further warning is issued when the planting section 2 is lowered and the falling area is reached.

Further, the elevating valve 50 is constituted by an electromagnetic valve, and the solenoid of the electromagnetic valve is connected to the controller 41. When the solenoid is tilted by a predetermined angle or more, the lowering solenoid is actuated to lower the planting section 2. It is also possible to configure so that

[0020]

As described above, the present invention has the following advantages. That is, as described in claim 1, a tilt sensor is arranged in the main body of the riding rice transplanter, and when the main body tilts more than a set angle, an alarm is issued by a signal from the tilt sensor, and at the same time, the elevating valve is operated to the lower side. Since the planting section is lowered, if the machine is tilted by more than the set angle, there is a risk of falling over by an alarm. By lowering, the center of gravity of the entire aircraft lowers, preventing it from immediately reaching the overturn area.The operator only needs to stop the operation and does not need to perform multiple operations, and can easily move to the overturn avoiding action. it can.

According to a second aspect of the present invention, an inclination sensor is arranged on the main body of the riding rice transplanter and connected to control means.
An actuator for slidably moving a spool of an elevating valve for controlling the elevating and lowering of the planting portion is arranged, and the actuator is connected to the control means. When the detected value of the inclination sensor exceeds a set range, the actuator is moved up and down by the actuator. Since the valve is controlled to switch to the descending side, in addition to the conventional tilt sensor and control means, it is possible to configure the overturn prevention mechanism simply by arranging the actuator on the elevating valve. This makes it possible to configure the device at low cost.

[Brief description of the drawings]

FIG. 1 is an overall side view of a rice transplanter equipped with a fall prevention mechanism of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a control block diagram and a hydraulic circuit diagram.

FIG. 4 is a diagram showing an operation unit of a control valve.

FIG. 5 is a sectional view of a hydraulic pump driving unit.

[Explanation of symbols]

 2 Planting part 41 Controller 50 Elevating valve 55 Inclination sensor 56 Alarm device 59 Actuator 61 Spool

Claims (2)

[Claims] An inclination sensor is disposed on the main body of a riding rice transplanter, and when the main body is tilted beyond a set angle, an alarm is issued by a signal from the inclination sensor, and at the same time, an elevating valve is actuated to a descending side to set a planting section. The mechanism for preventing the rice transplanter from tipping over, characterized in that it descends. 2. An incline sensor is arranged on the main body of the riding rice transplanter to be connected to the control means, and an actuator is provided for slidably moving a spool of an elevating valve for controlling the elevating of the planting portion. Is connected to the control means, and when the detection value of the inclination sensor exceeds a set range, the actuator is controlled to switch the elevating valve to the descending side.