JP2854483B2 - Work vehicle control structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for receiving an output from an operation switch or an analog output sensor, electrically controlling a plurality of work control targets in a predetermined state based on the input information, and controlling the operation of the apparatus. The present invention relates to a control structure of a work vehicle including a control device for driving a notifying means for notifying a pilot of a control state.

[0002]

2. Description of the Related Art Conventionally, in a control structure of a work vehicle, in a process of assembling a product, wiring for electrically connecting the operation switch or analog output sensor to a control device and connecting the control device to a controlled object are used. Checking whether or not the electrical connection such as wiring is performed normally is performed by connecting a check pin to each connection terminal, inputting an output signal at each terminal to a dedicated checking device, This is done by detecting whether the electric signal is output as set or not.

[0003]

Recently, a work vehicle having a configuration in which various actuators to be controlled are automatically controlled by a control device such as a microcomputer based on output information of artificial operation tools and various detection sensors is practically used. In such a control structure, it is necessary to inspect whether or not the electrical connection such as soldering is normally performed in the manufacturing process. There is a drawback that a dedicated check device having a complicated circuit configuration is required and the cost is increased, and there is a problem that extra work time is required for mounting the check device and the like, and there is room for improvement. An object of the present invention is to eliminate the above disadvantages.

[0004]

According to the present invention, an output from an operation switch or an analog output sensor is input, and a plurality of work controlled objects are electrically driven to a predetermined state based on the input information. In a control structure of a work vehicle having a control device that drives a notifying means for notifying a control state to a pilot, a control device includes: a work control mode for driving and controlling a plurality of work controlled objects; Switching operation means capable of switching to an operation check control mode for diagnosing the operation state of the work controlled object. When the control device is set to the operation check control mode, the operation switch switching operation or the The notification means is switched to the abnormal display state so that the diagnosis result of the input change state accompanying the output change operation of the analog output sensor is displayed on the notification means. Wherein the are provided with operation check control unit to obtain.

[0005]

When the switching operation means is set to the operation check mode after assembling the product after the electrical connection is completed, the control device is switched to the operation check mode pre-installed in itself. With the operation check mode set, if the output signal states of the operation switch for supplying the original control input signal and the analog output sensor are artificially changed, the function of the operation check control means causes The notification means is switched to the abnormal display state so that the diagnosis result of the change state of the input signal is displayed by the notification means such as lamps and sound generation means.

That is, in the work control mode, the notifying means for notifying the control input signal can be switched to the abnormal display state, so that the signal from the operation switch or the analog output sensor can be reliably transmitted to the control device. The operator can recognize whether or not the input has been made, and can be used as abnormality detecting means for performing an inspection.

[0007]

Accordingly, it is necessary to check whether the connection between the operation switch or the analog output sensor and the control device is normally performed, or whether the operation switch or the analog output sensor itself is malfunctioning. It can be done by using the notification means built into the original product effectively and sharing it, so that the structure can be made simple, cost-effective and easy without any trouble without using an external dedicated check device. became.

[0008]

Embodiments will be described below with reference to the drawings. FIG.
2 shows a riding rice transplanter which is an example of a working machine. This rice transplanter is configured such that a seedling planting device 2 is connected to a rear portion of a riding type traveling machine body via a link mechanism 1 so as to be capable of driving up and down and rolling freely around a longitudinal axis. The traveling aircraft has an engine 3 mounted in a hood at the front of the aircraft, transmits the power of the engine 3 to a transmission case 5 via a belt-type continuously variable transmission 4, and supplies the transmission to the front and rear wheels 6, 7 from the transmission case 5. On the other hand, a transmission system is configured to supply the seedlings to the seedling planting apparatus 2 so that the seedlings can be planted while running the machine.

As shown in FIG. 1, the belt type continuously variable transmission 4 includes a drive pulley 8 mounted on an output shaft 3a of the engine 3.
The transmission belt 10 is wound around the driven pulley 9 attached to the input shaft 5a of the transmission case 5 and the pulleys 8 and 9 are provided in a split pulley type in which the interval between the pulleys can be changed. Electric cylinder CY
By changing the belt winding diameter of each of the pulleys 8 and 9 in a reciprocal manner by the climbing cam mechanism 11 integrally operated by [an example of the actuator], the speed can be steplessly changed. is there.

The electric cylinder CY of the continuously variable transmission 4
Is driven and controlled by a control device 13 having a microcomputer. The control device 13 controls the input value from the speed setting device 12 composed of a potentiometer and the electric cylinder CY.
The feedback control of the electric cylinder CY is performed so that the detected value of the stroke sensor 14 that detects the actual operation stroke of the electric cylinder CY matches. The operating stroke of the electric cylinder CY is set so that the machine running speed and the set speed correspond.

Therefore, the operator can arbitrarily set the vehicle traveling speed by operating the speed setting device 12. When the value detected by the engine speed sensor drops to the first set value, the electric cylinder CY is decelerated regardless of the value set by the speed setter 12, and when the value returns to the second set value, the speed is increased. The vehicle speed control means A is provided in the form of a control program.

The vehicle speed control mode can be selectively turned on and off by a vehicle speed control on / off switch 15, and a vehicle speed control mode display lamp 16 is turned on when the control device is set to the vehicle speed control mode. I have. The ON / OFF operation state of the vehicle speed control ON / OFF switch 15 is displayed by an ON / OFF display lamp 15a.

The seedling planting apparatus 2 comprises a seedling stand 18 which reciprocates horizontally with a constant stroke in the left and right direction, a planting mechanism 19 for taking out seedlings one by one from the lower end of the seedling stand 18 and planting them in a field. A plurality of ground floats 20 that perform a leveling operation while following a ground on a mud surface, and a drawable marker 21 that is provided on both the left and right sides of the seedling planting device 2 and that draws a travel index line in an unplanted area with the planting operation. And the like.

The drawing marker 21 is wire-linked so as to be automatically stored in conjunction with the raising operation of the seedling planting apparatus 2, and is configured to be automatically held in a stored state by a lock mechanism (not shown). With the switching operation of the marker switch 22, the locked state of the lock mechanism is selectively released by the electromagnetic solenoid SL, and the drawing marker 21 on the desired side is switched to the operating posture as the seedling planting device 2 descends. It is configured in. The marker switch 22 is urged to return to the neutral state, and based on an operation in any direction, energizes the corresponding electromagnetic solenoid SL for a certain period of time to perform a lock release operation.

The raising and lowering operation of the seedling planting apparatus 3 is configured so that it can be manually operated based on the operation of an artificial raising / lowering lever 23 of a back-and-forth swing operation type provided in the aircraft operating section. The amount of forward / backward operation of the artificial elevating lever 23 is detected by a potentiometer type lever sensor 24, and the output thereof is discriminated by the control device 13 for each set level in a zone, and the electromagnetic force is applied to the lift cylinder 25 so as to be in an operation state corresponding to each operation position. The switching control of the hydraulic control valve V is performed.

That is, when the elevating lever 23 is operated to the "elevated position", the seedling planting device 2 is forcibly elevated to the maximum position. When operated to the “neutral position”, the seedling planting device 2
Keeps the current level and operates the “down position” to lower the seedling planting device 2 until it touches the mud surface. When the operator operates the "planting position", the seedling planting device 2 is lowered and the electric motor 26 is driven to lower the planting clutch 27.
To set the planting work state. Further, a swing lever type raising / lowering operation switch SW1 is provided, and is configured to be freely switchable between a state in which the seedling planting apparatus 2 is forcibly raised to a maximum ascending position and a state in which it is lowered on the ground based on the operation of the switch SW1. is there. This lifting operation switch S
W1 is configured to be operable only when the lift lever 23 is operated to the "automatic position".

The seedling planting depth, that is, the seedling planting device 2
Automatic lifting control means B for controlling the driving of the lift cylinder 25 so that the height of the mud surface is always kept constant. That is, the vertical swing amount caused by the fluctuation of the ground height is detected above the front side of the grounding float 20 located at the center in the left and right direction among the grounding floats 20 provided to be vertically swingable around the rear horizontal axis X. The electromagnetic pressure control valve V of the lift cylinder 25 is switched by the control device 13 so that the detection value of the float sensor 28 matches the set value of the potentiometer type sensitivity adjuster 29. is there. In this automatic lifting control, the lifting lever 23 is moved to the “planting position”,
Activated only when set to "down position" or "automatic position".

The control device 13 can be switched between a work control mode for driving and controlling a plurality of work controlled objects and an operation check control mode for diagnosing the operation state of the work controlled objects. A mode changeover switch 30 is provided as a changeover operation means, and a switch operation of each of the switches 15, 22, and SW1 or a potentiometer type setting device 1 as an analog output sensor is provided in a state where the operation check control mode is set.
In accordance with the output change operation of the sensors 2, 29 and the sensors 24, 28, the display contents of the on / off display lamp 15a (an example of a notifying means) are changed in such a manner that the operator can recognize the diagnosis result of the input change state. Operation check control means C for switching to an abnormal display state. The operation check control means C is provided in the control device 13 in the form of a control program in advance, and the control device 13 controls as follows.

As shown in FIG. 2, the changeover switch 30
Is turned on, the operation check mode is set [steps 1 and 2]. When the operation check mode is set, the operator manually operates each switch and each potentiometer type sensor sequentially by a manual operation, and the signal is turned on. Is changed [Step 3]. Then, the control device 13 reads the input signals of the switches and the sensors, and if the output of each switch is changing, turns on and off the display lamp 15a at a predetermined interval. Is turned off [steps 4 to 7].

Similarly, if there is a change in the output of the analog sensors, the on / off indicator lamp 15a is lit at a predetermined interval, and if not, the on / off indicator lamp 15a is turned off [steps 8 to 10]. In this way, the on / off indicator lamp 15a can be used also as an abnormality detecting means for diagnosing failures of switches and sensors and checking for broken wires.

In the claims, reference numerals are provided to facilitate comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is a control block diagram.

FIG. 2 is a control flowchart.

FIG. 3 is a side view of the rice transplanter.

[Explanation of symbols]

 13 control device 15a notification means 30 switching operation means C operation check control means

Claims (1)

(57) [Claims] An output from an operation switch or an analog output sensor is input, and based on the input information, the plurality of work controlled objects are electrically driven and controlled to a predetermined state, and the control state is changed by the operator. A control structure of a work vehicle provided with a control device (13) for driving a notifying means (15a) for notifying the plurality of work controlled pairs.
Work control mode to drive and control elephants and
An operation check control module that diagnoses the operation state of the controlled object.
Switching operation means (30) that can be switched between
In addition, the control device (13) controls the operation check.
When the mode is set to
Operation or output change operation of the analog output sensor
The diagnosis result of the input change state accompanying the
As shown in a), the notification means (15a) is abnormal.
Operation check control means (C) for switching to the display state is provided.
The control structure of a working vehicle.