JPH032101Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a warning device in a harvester.

Recently, harvesting machines have been equipped with various monitoring functions, and when an abnormality or malfunction occurs, it is notified by sound, lamp, buzzer, etc. The screw is also configured to issue a predetermined alarm when its rotational speed decreases. At the start of normal work, the threshing clutch and reaping clutch are engaged after the engine has been raised to a predetermined rotational speed, so despite the increased load when engaged, the rotational speed of the handling cylinder and No. 2 screw remains constant. However, if the threshing clutch and reaping clutch are engaged without increasing the engine speed, the handling cylinder,
The number of revolutions of the No. 2 screw decreased due to the load when the clutch was engaged, and there was a risk that an alarm would be issued even though there was no abnormality in the handling cylinder or the No. 2 screw.

The present invention was developed in view of the above circumstances, and is configured to detect the number of revolutions of the handling drum and/or No. 2 screw of the threshing section, and issue an alarm based on the detection result. An object of the present invention is to provide an alarm device for a harvester that operates only when the output is operated to a predetermined value.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on drawings showing embodiments thereof.

FIG. 1 is a partially cutaway side view of a harvesting machine equipped with a warning device according to the present invention (hereinafter referred to as the present device), in which a threshing section 3 is mounted on the upper part of the machine above the traveling crawler 1, and the threshing section 3 is mounted on the front of the machine. A reaping section 7 consisting of a grass dividing rod 4, a cutting blade 5, a grain culm lifting device 6, etc. is installed in the section. The handling cylinder 32 of the threshing section 3 is provided with a handling cylinder sensor 47 for detecting the number of revolutions of the handling cylinder, as will be described later.
A No. 2 screw sensor 46 is provided to detect the rotational speed of the No. 2 screw. FIG. 2 is an electronic circuit diagram of the main parts of the present device. In the figure, 10 is a microcomputer that performs various automatic controls, and is connected to the positive terminal of a battery 31 via a key switch 32, including a CPU (central processing unit) 11, an input/output interface 12, and a ROM (read-only memory). 13.RAM (Random Access Memory)
It consists of 14 mag.

Sensors, switches, etc. are connected to a large number of input ports of the input/output interface 12.
A threshing clutch 41 is connected to the input port _a1 , which turns on and sets the port _a1 to a high level when the threshing lever, which is involved in the joint and threshing operation of the threshing clutch, is operated to the threshing side to connect the threshing clutch. has been
In addition, a reaping clutch 42 is connected to the input port _a2 , which turns on and sets the port _a2 to a high level when the reaping lever, which engages and disengages the reaping clutch, is operated to the reaping side to engage the reaping clutch. has been done.

The input port _A3 is provided in the rotation range of the base end of an accelerator lever 94 arranged on the operation column 9 in front of the driver's seat 8, and when the accelerator lever 94 is operated to bring the engine speed to the rated value. A normally closed accelerator switch 43 that is turned on is connected, and when the accelerator switch 43 is turned on, the port _a3 becomes high level.

The input port _A4 is turned on when the pressure in the hydraulic circuit of the hydraulic system driven by the engine is below a predetermined pressure (it is turned off when the normal pressure is reached due to engine rotation) and the oil pressure sensor 44 and the engine. The level is set to high or low based on the detection result of an engine rotation sensor 50 that detects the rotation speed. That is, a series circuit of an oil pressure alarm LED (light emitting diode) 74 and an oil pressure sensor 44 is interposed between the line connected to the key switch 32 and the body ground, and the connection point between the oil pressure alarm LED 74 and the oil pressure sensor 44 is connected to the inverter 33. One end of each of the first normally open contact 341a and the normally closed contact 341b of the electromagnetic relay 34 is connected to a terminal through which the electromagnetic relay 34 is connected. The other end of the normally open contact 341a is the inverter 3
The normally closed contact 341b is directly connected to the other end of the OR gate 36, and the output of the OR gate 36 is connected to the input port _a4 of the input/output interface 12. It is given.

The excitation coil 34c of the electromagnetic relay 34 is configured to be excited or demagnetized based on the detection result of the engine rotation sensor 50. In this embodiment, the engine rotation sensor 50 includes a disk 50a that rotates in conjunction with the output shaft of the engine, and a reed switch 50b.
A disk 50a is used.
A plurality of magnetic bodies 50c are fixed to the periphery of the magnetic body 50c, and a reed switch 50b is turned on according to the approach or separation of the magnetic bodies 50c. 50d is an integrator that is charged when the reed switch is turned on and discharged through the resistor 50e, and its output voltage is determined by the number of times the reed switch 50b is turned on per unit time, in other words, The level changes depending on the rotational speed of the engine 50a or the engine. The output voltage of the integrator is - of the comparator 51.
is given to the input terminal. The + input terminal of the comparator 51 is connected to the connection point of a series circuit of a resistor 52 and a resistor 53 interposed between the positive electrode line of the battery 31 and the body ground.
A predetermined voltage determined by 2 and 53 is the positive input of the comparator 51.

The comparator 51 outputs a high-level signal when the +input voltage becomes higher than the -input voltage, and the output is sent to the electromagnetic relay 34 via the resistor 54.
A switch transistor 55 is provided between the excitation coil 34c and body ground. Therefore, when the output of the comparator 51 is at a high level, the switch transistor 55 is turned on and the exciting coil 34c is excited. Therefore, when the engine speed is above a predetermined value, the oil pressure sensor 44
When the oil pressure sensor 44 is turned on, the input port _a4 becomes a high level, and when it is turned off, the input port a4 becomes a low level.If the engine speed is below a predetermined value, when the oil pressure sensor 44 is turned on, the input port a4 becomes a low level, and when it is turned off, the input port a4 becomes a high level.

Input port a ₅ of input/output interface 12
is set to a high or low level based on the detection results of the charging circuit 45 of the battery 31 and the engine rotation sensor 50. That is, the charging circuit 45
The output is given to the charge warning LED 75 and the second output of the electromagnetic relay 34 is controlled based on the detection result of the engine rotation sensor 50 as described above.
The other end of the normally open contact 342a is connected to the - input end of the OR gate 38 via the inverter 37, and the other end of the normally closed contact 342b is connected to one end of the normally closed contact 342a and the normally closed contact 342b. is connected to the other input terminal of the OR gate 38. and
The output of OR gate 38 is applied to input port _a5 .

Therefore, when the engine speed is equal to or higher than a predetermined value, the input port _A5 becomes a high level when the output of the charging circuit 45 is at a high level, and becomes a low level when it is a low level, and the engine speed becomes the predetermined value. In the following cases, when the output of the charging circuit 45 is high level, the input port _a5 becomes low level,
When the output of the charging circuit 45 is at a low level, the input port _a5 becomes at a high level.

No. 2 screw sensor 4 that detects the rotation speed of No. 2 screw 93 of the No. 2 grain removal section is connected to input port _a6 .
6 is connected, and when the No. 2 screw 46 becomes overloaded, the No. 2 screw sensor 46 outputs a high level signal to the port A ₆ and also issues the No. 2 alarm.
Turn on LED 76.

A handling cylinder rotation sensor 47 that detects the rotational speed of the handling cylinder is connected to input ports _a7 and _a8 , and when the handling cylinder becomes overloaded and the rotational speed becomes low, the handling cylinder rotation sensor 47 connects to port _a7. is set to a high level and the deceleration instruction LED 77 is lit, and if the handling trunk becomes abnormally low, port _A8 is set to a high level and the aircraft stop instruction LED 78 is lit.

A paddy sensor 49 is connected to the input port _a9 , which turns on when the amount of paddy in the topsatsuka reaches a predetermined value or more, and sets the port _a9 to a high level.
When 9 is turned on, a paddy alarm LED 79 lights up.

On the other hand, a speech synthesizer 81 is connected to the output port b ₁ , and receives a control signal from the CPU 11.
A ROM dedicated to the voice synthesizer that stores voice data
The data in (read-only memory) 82 is read out and an analog audio signal is output, and this signal is amplified by an amplifier 83 to drive a speaker 84.

Output ports b ₂ , b ₃ , b ₄ each have lamps 61 , 62 ,
63 are connected to the output ports b ₁ , b ₂ ,
When b ₃ becomes high level, lamps 61, 62, 63
are lit respectively. The microcomputer 10 logically judges the status of all the switches and sensors 41 to 49 and lights or blinks each lamp 61 to 63 of the master lamp 60 in accordance with the degree and condition of the abnormality. It is a blue lamp that lights up continuously when the work is being done normally, and flashes when it is not in working condition even though each part is normal, and 62 indicates that the degree of abnormality is relatively minor. It is possible to continue work, but if left untreated, the abnormality will expand and cause loss of grain, etc. This is a yellow lamp that flashes. Furthermore, 63 indicates that work cannot be continued unless immediate action is taken. This is a red lamp that flashes when a high-risk abnormality occurs.

A buzzer 85 is connected to _the output port b ₄ and sounds intermittently for a predetermined period of time when the yellow lamp 62 and red lamp 63 blink.

FIG. 3 is a partially cutaway perspective view of the display device 20 disposed on the operation column 9 in front of the driver's seat 8. FIG. The display device 20 has a printed board 23 fixed on the bottom plate 22 of a horizontally long display box 21, and the top surface of the printed board 23 is coated with the above-mentioned materials whose surface has been processed to have uneven reflections.
LEDs 74 to 79 are arranged in parallel, and the upper side thereof is covered with a front mask 24 made of a purple translucent acrylic smoke resin.

Therefore, when each of the LEDs 74 to 79 is turned on, the driver must look at each of the LEDs 74 to 7 through the front mask 24.
9 is lit, and will not be affected by sunlight. Normally, when sunlight or the like is reflected on an LED, there is a risk of misperception that the LED is on, but by diffusely reflecting the LED surface, such misperceptions due to reflection of sunlight can be prevented. In this case, if the LED surface is treated with diffused reflection, the focal point when the LED is lit becomes blurry and difficult to see when directly viewing the LED, but since the LED is covered with a translucent front mask 24,
There is no such fear, and it is possible to reliably capture the lighting of the LED.

The operation of the present device constructed as described above is as follows. When the key switch 32 is turned on and the engine is not started, the oil pressure sensor 44 is turned on because the hydraulic system and the charging circuit 45 are not operating, and the output of the charging circuit 45 is at a high level, causing the oil pressure alarm LED 74 and the charging circuit to turn on. alarm
Although the LED 75 lights up, the output of the comparator 51 is at a high level and the excitation coil 34c is excited, so the input port _a4 is at a low level and the input port
_a5 becomes low level, the speech synthesizer is not driven, and no alarm message related to abnormality in any circuit is issued.

On the other hand, when the engine is started and its rotational speed exceeds a predetermined value, the hydraulic system and charging circuit 45 operate, the oil pressure sensor 44 is turned on, the output of the charging circuit 45 is at a low level, and the LEDs 74 and 75 are turned off. In addition, the output of the comparator 51 becomes low level and the excitation coil 34c is also demagnetized, so that the input port
_A4 and _A5 remain at a low level, and no alarm message is emitted from the speaker 84. If an abnormality occurs in the hydraulic circuit or the charging circuit 45 when the engine speed is higher than a predetermined value, the oil pressure sensor 44 turns on or the output of the charging circuit 45 becomes high level, and the oil pressure alarm LED
74 or the charge alarm LED 75 lights up, the input port _a4 or _a5 becomes high level, and the voice synthesizer 81 causes the speaker 84 to emit a predetermined alarm message regarding an abnormality in the hydraulic circuit or the charging circuit 45. In this case, the oil pressure sensor 44 itself,
Alternatively, even if an abnormality occurs in the harness wires connecting the oil pressure sensor 44, the charging circuit 45, and the input ports _a4 , _a5 of the input/output interface 12, the voice synthesizer 81 sends a predetermined warning message related to the abnormality. will be emitted.

The hydraulic system and charging circuit are not driven when the engine is stopped, so if it is detected that both the hydraulic system and charging circuit are not operating, the voice synthesizer assumes that the engine is not being driven. A warning message related to either abnormality is not issued, and if an abnormality in either circuit (including a non-operating state) is detected, an alarm message related to that abnormality is issued, assuming that the engine is already running. A configuration has been considered in which a message is emitted, but in such a case, if one of the circuits is in an abnormal state due to an abnormality in the sensor, harness wire, etc. when the engine is stopped, that is, when the engine is stopped, If one circuit detects an operating state and the other circuit detects an inoperative state (normal state when the engine is stopped), in this case, the engine is assumed to be running and the circuit is not operating. An alarm message will be issued for a circuit that is not operating (normal state when the operating engine is stopped). However, in the device of the present invention, there is no such risk and a predetermined warning message related to a circuit in which an abnormality has occurred is reliably issued even when the engine is stopped.

Other main alarm operations performed by the microcomputer 10 are as follows. After starting the engine, the threshing clutch and the reaping clutch are engaged, the threshing clutch 41 and the reaping clutch 42 are turned on, and each input port a ₁ , a ₂ is at a high level, and the accelerator lever 94 is not yet operated. When the accelerator switch 43 is turned off and the input port a3 is at high level, even if the No. ₂ screw sensor 46 or the handling cylinder rotation sensor 47 detects that the No. 2 screw 93 or the handling cylinder 92 is rotating at a low speed, no sound is generated. The synthesizer 81 is not operated, no alarm message is issued for the No. 2 screw sensor 46 or the handling cylinder sensor 47, and the buzzer 85 does not sound, but the yellow lamp 62 or the red lamp 63 of the master lamp 60 flashes. This is because the accelerator lever 94 is not at the rated position, so the engine output is not increasing, and the decrease in rotational speed of the handling cylinder 92 and No. 2 screw 93 is temporary when the threshing clutch, etc. is engaged. Therefore, the voice synthesizer 81 does not issue an audible alarm or the buzzer 85 issues an alarm, but only the yellow lamp 62 or the red lamp 6 of the master lamp 60 indicates this condition.
The notification is made by flashing 3. In this case, regardless of whether the accelerator switch 43 is on or off, abnormalities in other parts such as the top of the vehicle are notified by the voice synthesizer 81 and the buzzer 85.

In addition, when performing work, be sure to press the accelerator lever 9.
When 4 is set to the rated position, accelerator switch 43 is turned on and input port _A3 becomes low level, and then 2
Number screw sensor 46 and handling cylinder sensor 47 are each 2
When an abnormality is detected in the number screw 93 or the handling cylinder 92, a sound related to each abnormality is emitted and a buzzer 8 is activated.
5 and also causes the master lamp 60 to operate in a predetermined manner. In other words, when the No. 2 screw sensor 46 detects the abnormally low rotation of the No. 2 screw and sets the input port _A6 to a high level, the voice synthesizer 81 issues a message from the speaker 84 saying, "Please stop. The No. 2 screw is overloaded. ” and buzzer 8.
5 is made to sound intermittently for a short time, and furthermore, the red lamp 63 of the master lamp 60 is made to blink. Furthermore, when the handling cylinder sensor 47 detects abnormally low rotation of the handling cylinder 92 and sets the input port _a7 to a high level, the voice synthesizer 8
1 causes the speaker 84 to emit a voice saying ``Please decelerate. There is an abnormality in the handling cylinder.'', causes the buzzer 85 to sound intermittently for a short time, and further causes the yellow lamp 62 of the master lamp 60 to blink. Furthermore, when the handling cylinder sensor 47 detects a lower rotational state of the handling cylinder 92 and sets the input port <sub>A8</sub> to a high level, the voice synthesizer 81 issues a message from the speaker 84 saying, ``Please stop. The handling cylinder is abnormal. '', the buzzer 85 is made to sound intermittently for a short time, and the red lamp 63 of the master lamp 60 is made to blink. Therefore, the driver will be aware of the abnormality from both the sound and the lighting of the lamp.

In the above-described embodiment, the alarm is issued by sound, but the alarm may be issued by a lamp or the like.

As described in detail above, the present invention is a harvester alarm system that is configured to detect abnormalities in the handling cylinder and/or No. 2 screw of the threshing section and issue an alarm. Since the above-mentioned alarm is issued only when the problem occurs, abnormalities in the No. 2 screw and the handling cylinder are reliably notified without the risk of false alarms.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention.
The figure is a partially cutaway side view of a harvester equipped with the device of the present invention, FIG. 2 is an electronic circuit diagram thereof, and FIG. 3 is a partially cutaway perspective view of a display device. 3... Threshing section, 9... Operation column, 20... Display device, 41... Threshing clutch, 43... Accelerator switch, 44... Oil pressure sensor, 45... Charging circuit, 46... No. 2 screw sensor, 47 ... Handling cylinder sensor, 94 ... Accelerator lever.

Claims (1)

[Scope of utility model registration request] In a harvester alarm system configured to detect an abnormality in the handling cylinder and/or No. 2 screw of the threshing section and issue an alarm, the alarm is configured to issue the alarm only when the engine speed is operated to a predetermined value. An alarm device for a harvester, characterized by: