JP3443303B2 - Work machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided with a main switch that is switchable between an off state for stopping the operation of an engine and an on state for enabling the operation of the engine, and stops the operation of the engine. Manual stop command means for instructing a stop command, an actuator for stopping the engine, and stop control means for controlling the operation of the actuator based on the stop command from the stop command means are provided. Regarding the working machine.

[0002]

2. Description of the Related Art In the above-mentioned working machine, a worker turns on a main switch to operate an engine to perform work. However, in order to stop the engine in an emergency depending on a working situation, an engine stop command switch is used. (Equivalent to a manual stop command means) is provided to stop the operation of the engine based on the stop command from the stop switch. For example, in the combine as an example of the working machine, as illustrated in FIG. 6, the engine is operated in a state where the traveling is stopped to drive the threshing device 14,
There is a case where an operator supplies the grain culm that has been cut by hand from the grain culm supply portion on the front side of the threshing device 14 to perform the threshing process, that is, a so-called manual handling work is performed. In order to stop the, the stop switch b which is turned on by the rocking operation of the lever a is provided close to the grain culm supply point, and based on the ON information of the stop switch b,
For example, an actuator such as a solenoid for cutting off fuel supply to the engine is operated to stop the operation of the engine (for example, Japanese Patent Laid-Open No. 9-322).
639 gazette).

[0003]

In the above-mentioned prior art, when the stop switch is operated, the actuator operates to stop the engine. However, the operator wants to stop the engine quickly, The stop switch may be operated repeatedly for a number of times. In this case, although the engine is stopped by the first stop command, the actuator such as the solenoid continues to operate according to the switch operation, and a large current flows in the coil such as the solenoid in a short time. As a result, there is a risk that the coil may become overheated and burned out.

The present invention has been made in view of the above circumstances, and an object thereof is to stop an engine while an operator can give an engine stop command to surely stop the engine in an emergency. An object of the present invention is to eliminate the above-mentioned drawbacks of the conventional technique by preventing the actuator for operation from performing unnecessary operation.

[0005]

According to the first aspect of the present invention, after the main switch is turned on to enable the engine to operate, the first stop command for stopping the engine from the manual stop command means is issued. When instructed, the actuator is operated to stop the engine regardless of whether or not the engine is in the operating state. On the other hand, when the stop instruction for the second time or later is instructed from the manual stop instruction means, , When the engine is operating, the actuator is operated to stop the engine, but when the engine is not operating, the actuator is not operated.

Therefore, the engine is unconditionally stopped in response to the first stop command after the main switch is turned on. Therefore, for example, it is determined whether the engine is operating from the rotational state of the engine. Judge whether
If the engine stop operation is performed only when the engine is running, if the engine stop condition is always detected due to a malfunction of the engine rotation detection sensor, etc. The engine can be stopped more reliably in an emergency, etc., compared to the case where the engine continues to operate without the stop operation being performed. At the same time, the engine does not operate for the second and subsequent stop commands. Since the actuator operates only when the engine is stopped, the actuator, such as a solenoid, will not operate unnecessarily even when the operator continuously issues a stop command even if the engine is stopped. It is possible to appropriately avoid problems such as the solenoid coil overheating and burning.

According to a second aspect, in the first aspect, when the actuator is activated, the notification means is activated. Therefore, the operator can accurately recognize that the engine is stopped, for example, by operating the notification means such as a buzzer, and the preferred means of claim 1 can be obtained.

According to a third aspect of the present invention, in the second aspect, when the actuator is operated, the notifying means is operated, and even after the actuator is operated, the notifying means is operated. Therefore, for example, by performing a notification operation for a set time after the actuator has been operated, or by performing the notification operation until the main switch is switched to the OFF state after the actuator has been operated, the surroundings other than the operator who has instructed the stop command The operator can be informed accurately that the engine has been stopped urgently, and the preferred means of claim 2 can be obtained.

[0009] In claim 4, any one of claims 1 to 3
In the paragraph, the working machine is configured as a combine equipped with a threshing device for threshing the cut culm that has been mowed with traveling, and a manual stop provided in proximity to the grain culm supply point to the threshing device The command means gives a stop command to the engine. Therefore, a so-called manual operation in which the engine is operated with the combine stopped running and the threshing device is driven, and the grain culm cut by the worker is supplied to the grain culm supply portion of the threshing device to perform the threshing process. At a time, etc., the engine can be stopped quickly and easily by operating a stop command means such as a switch provided close to the grain culm supply point, and thus, the engine can be stopped. Suitable means of

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention applied to a combine for agricultural work as a working machine will be described below with reference to the drawings. As shown in FIG. 1, the combine is provided with a mowing unit 12 for mowing the grain culms in the field as the vehicle travels, in the front part of a body V provided with a pair of left and right crawler traveling devices 11, and in the rear of the maneuver. The unit 13, the threshing unit 14 as a threshing device for threshing the cut culms cut by the mowing unit 12, the grain tank 15 for storing the grains supplied from the threshing unit 14, and the like are mounted.

The reaping section 12 conveys the weeding tool 16 attached to the tip end, the grain culm raising device 17, the cutting blade 18 for cutting the root of the raised grain culm, and the cut grain culm. It is provided with a transfer device 19 and the like for transferring to the feed chain 22 of the threshing unit 14. The harvesting unit 12 is provided with a stock origin sensor S1 which is turned on when the grain culm is touched to detect that the harvesting operation is being performed.

As shown in FIG. 2, the threshing unit 14 is provided with a handling cylinder 1
0, a handling room A for storing 0, a feed chain 22 for transporting cut culms, a sorting device B comprising a tomi 26 and a swing sorting plate 27, a grain recovery first port 20, and grains and straw waste. A second port 21 and the like for collecting the mixture of
The grain culm supplied and conveyed to the handling room A is threshed by the rotation of the handling barrel 10, and the single-grained grains in the processed product after threshing are handled in the handling room A
Leaks from the receiving net 28 below the swinging sorting plate 27 into the receiving net 2
The processed material that could not be leaked from 8 falls from the rear end portion of the receiving net 28 to the swing selection plate 27.

The swing selection plate 27 comprises a Glen pan 23 located above the tomi 26, a chaff sheave 24 located behind it, a Glen sheave 25 located below it, and the like. The chaff sheave 24 is composed of a plurality of strip-shaped members arranged in parallel in the processed material transfer direction, and a grain leakage gap is formed between adjacent strip-shaped members. Toumi 2
Reference numeral 6 denotes an electric fan, which generates a sorting wind for blowing off the straw waste on the swing sorting plate 27.

The power transmission system is constructed as shown in FIG. The power of the diesel type engine E is transmitted to the threshing unit 14 via the threshing clutch 31, and is transmitted to the mission 34 of the crawler traveling device 11 via the traveling clutch 32 and the hydraulic continuously variable transmission 33, so that the cutting operation is performed. Part 1
Power is transmitted to the vehicle 2 from the mission 34 via the harvesting clutch 35. A rotation speed sensor S3 is provided to detect the rotation speed of the engine E.
Corresponds to engine operating state detecting means for detecting whether or not the engine E is operating. Further, in order to detect whether or not the threshing unit 14 is operating, a threshing switch S4 for detecting the on / off state of the threshing clutch 31 is provided.

As shown in FIG. 1, in an emergency or the like, a push button type engine stop switch SW for stopping the engine E is brought close to the grain culm supply point to the threshing section 14 and the threshing section 14 is operated. It is provided on the lateral side of the machine. That is, the engine stop switch SW corresponds to a manual stop command unit that gives a stop command for stopping the operation of the engine E.

Next, the control configuration of the combine is shown in FIG. A meter controller 7 configured by using a microcomputer is provided, and the stock controller S1, the rotation speed sensor S3,
Each detection information of the threshing switch S4 and the engine stop switch SW is input. A key that can be switched between an OFF position for turning off the power supply from the drive power source (not shown) to each unit, an ON position for turning on the power supply from the drive power source to each unit, and a starting position for starting the engine E. A switch MW is provided, and the switching position information of the key switch MW is also input to the meter controller 7. That is, when the key switch MW is in the off state (OFF position) for stopping the operation of the engine E,
Corresponds to the main switch that can be switched to the ON state (ON position) that enables the operation of. On the other hand, the meter controller 7 outputs drive signals to the alarm buzzer 8 and the liquid crystal display unit 1 provided on the front panel of the control unit 13 for displaying various information to the operator. Has been done. The alarm buzzer 8 includes a front buzzer, a back buzzer, or both buzzers.

Next, the fuel supply configuration for the engine E will be described with reference to FIG. 4. The fuel in the fuel tank (not shown) is driven by the diaphragm-type fuel oil pump 6 during operation of the engine E. And the fuel injection pump 5 that is operated in accordance with the rotation of the engine E pumps the fuel sent by the fuel oil pump 6 and injects it from an injection nozzle (not shown) into the combustion chamber of the engine E. . In order to control the fuel oil supply, the fuel oil supply pump 6 is on / off controlled by the meter controller 7, and when the key switch MW is operated to switch from the ON position to the OFF position, and the engine. When a stop command is given from the stop switch SW, the timer circuit 2 that outputs a voltage signal of a set time width, the stop solenoid 4 that stops the fuel supply to the engine E, and the output voltage of the timer circuit 2 are A switching circuit 3 for activating the stop solenoid 4 when the value is equal to or greater than a set value is provided. Then, the stop solenoid 4 is excited so as to make the fuel injection amount of the fuel injection pump 5 zero during the set time determined by the timer circuit 2, whereby the operation of the engine E is stopped.

That is, the stop solenoid 4 corresponds to an actuator for stopping the engine E, and the meter controller 7 is used to stop the engine E based on a stop command from the engine stop switch SW. Stop control means 100 for controlling the operation of the solenoid 4 is configured. And the stop control means 10
0 means that when the engine stop switch SW issues a first stop command after the key switch MW is switched to the ON state, the rotation speed sensor S
When the stop solenoid 4 is operated irrespective of the detection information of No. 3 and the stop command for the second time or later is instructed, it is detected by the rotation speed sensor S3 that the engine E is in the operating state. It is configured to operate the stop solenoid 4 only. Further, the stop control means 100 operates the notification means 101 when operating the stop solenoid 4. Here, the notification means 1
Reference numeral 01 is composed of the alarm buzzer 8 and the liquid crystal display unit 1, an alarm sound is generated from the alarm buzzer 8, and a message "engine stopped" is displayed on the screen of the liquid crystal display unit 1.

Next, the engine emergency stop control by the meter controller 7 will be described with reference to the flowchart of FIG. First, it is checked whether or not the key switch MW is switched to the ON position, and the key switch MW is turned on.
At the N position, it is checked whether or not the engine stop command from the engine stop switch SW is input. here,
When the engine stop command is input, if the stop command is the first command after switching the key switch MW to the ON position, the timer circuit 2 is unconditionally operated to perform the engine stop operation. Further, the alarm buzzer 8 is activated and a notification operation for displaying a character indicating that the engine is stopped on the liquid crystal display unit 1 is performed. On the other hand, if the stop instruction is a second or later instruction, the rotation speed sensor S
At 3 it is determined whether the engine E is operating (whether it is rotating), and only when the engine E is operating, the engine stop operation and the notification operation are performed.

[Other Embodiment] In the above embodiment, the notification means 1 is provided only when the stop control means 100 operates the actuator (stop solenoid 4) for stopping the engine.
01 is operated, however, in addition to this, the notification means 101 may be operated even after the actuator is operated. Specifically, after the operation of the actuator is stopped, the notification operation may be continued for a set time, or the notification operation may be continued until the key switch MW is switched from the ON position to the OFF position.

In the above embodiment, the engine E is a diesel engine, but other engines may be used.

In the above embodiment, the main switch is constituted by the key switch, but it may be a push button type main switch other than the key type.

In the above-described embodiment, the manual stop command means SW is constituted by a push button type switch which the operator pushes with his / her finger or the like, but other than this, for example, a swingable lever is used. It may be a switch that operates.

In the above embodiment, the actuator for stopping and driving the engine E is constituted by the stop solenoid 4 for stopping the fuel injection operation of the fuel injection pump 5 for the engine E, but other means other than the solenoid may be used. . Further, instead of stopping the fuel injection pump 5, for example, drive means (a solenoid or the like) for activating a shutter for blocking a path provided in a fuel pressure feeding path to the fuel injection nozzle in a blocked state.
The actuator may be configured as described in.

In the above embodiment, the engine operating state detecting means is constituted by the rotation speed sensor S3 of the engine E.
Besides this, for example, with the output voltage of the dynamo for power generation,
You may make it detect whether the engine E is an operating state.

In the above embodiment, the alarm means 101 is composed of the alarm buzzer 8 and the liquid crystal display device 1. However, the present invention is not limited to this. For example, the liquid crystal display device 1 is replaced by a flashing lamp or the like. You may.

The present invention can be applied to ordinary combine harvesters other than the self-removing combine as in the above embodiment, other agricultural working machines, or other working machines.

[Brief description of drawings]

FIG. 1 is a side view of a self-removing combine according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view showing the configuration of a threshing unit.

FIG. 3 is a schematic diagram of a power transmission mechanism

FIG. 4 is a control block diagram of the combine.

FIG. 5 is a flowchart of engine emergency stop control.

FIG. 6 is a plan view showing manual operation of a harvested culm with a combine in the related art.

[Explanation of symbols]

4 actuators 14 Threshing equipment 100 stop control means 101 notification means E engine MW main switch S3 engine operating state detection means SW stop command means

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroaki Ema 64 Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Co., Ltd. Sakai Works (56) Reference JP-A-9-205852 (JP, A) JP-A-2-205 124328 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) A01D 69/00-69/06

Claims (4)

(57) [Claims] 1. A manual switch, which is provided with a main switch which can be switched between an off state for stopping the operation of the engine and an on state for enabling the operation of the engine, and which gives a stop command for stopping the operation of the engine. And a stop control means for controlling the operation of the actuator based on a stop command from the stop command means. An engine operating state detecting means for detecting whether or not the engine is in an operating state is provided, and the stop control means is first operated by the stop command means after the main switch is switched to the on state. Is instructed to operate the actuator irrespective of the detection information of the engine operating state detecting means. In addition, when the second and subsequent stop commands are instructed, the actuator is operated only when the engine operating state detecting means detects that the engine is operating. Working machine. 2. The work machine according to claim 1, wherein the stop control means is configured to operate an informing means when the actuator is operated. 3. The work machine according to claim 2, wherein the stop control means is configured to operate the notification means even after the actuator is operated. 4. A working machine is configured as a combine equipped with a threshing device for threshing the cut culms that have been mowed while traveling, and the stop command means is arranged to be close to a grain culm supply point to the threshing device. The working machine according to any one of claims 1 to 3, which is provided.