JPH08268136A - Dump truck - Google Patents

Abstract

PURPOSE: To prevent a dump truck from being running while its empty vessel is being left as is elevated, and thereby prevent the occurrence of collision and the like by providing a means forcing the vessel to be lowered down when an warning operation is not released through a cancel switch. CONSTITUTION: An abnormality avoiding means 5 warns a driver of a vessel 2 left as is elevated with a warning display means 13 operated by a control action based on signals, and also prohibits the truck to be run at a speed higher than a definite speed by actuating an operation prohibition means 14 with an accelerator pedal depressed. When an cancel switch 11 won't be turned on even if a warning is given, it is judged that the driver is not aware that he forgets to lower the vessel 2 down, and the vessel 2 is thereby forced to be lowered down. In order to prevent the clump truck to be kept running while the driver is not aware that the vessel 2 is left as is elevated, by forcing the vessel 2 to be lowered down in the case that the vessel 2 is actually left as is elevated, the vessel 2 is thereby prevented from being hit against overhead beams and the like in the plant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dump truck adapted to properly warn a user to forget to lower a vessel.

[0002]

2. Description of the Related Art When loading and unloading raw materials loaded on a vessel of a dump truck, the vessel is raised,
After discharging, you may forget to drop the empty vessel and continue driving. In particular, when the empty vessel was inadvertently run with the vessel raised after loading and unloading the raw materials inside the factory, the vessel sometimes hit the beam of the factory and damaged.

In order to prevent the empty vessel from being left unloaded, there has been a method in which a warning light flashes when the vessel is run with the vessel raised (the same problem is dealt with). In order to do so, when traveling with the crane arm stored,
A warning is proposed by Japanese Patent Application No. 4-66466).

[0004]

However, even if the warning light blinks in this way, the driver may overlook it. Especially when loading and unloading raw materials in the factory, the vessel is gradually raised with the vessel raised. Often draining raw materials while traveling, in which case the driver ignores the blinking of the warning light, so the vessel can be completely emptied during such frequent operations. However, it is easy to drive without forgetting to drop it.

That is, even if the vehicle travels without lowering the vessel, it is not always an abnormal travel, and it is difficult to give an appropriate warning.

An object of the present invention is to solve such a problem.

[0007]

The first invention, as shown in FIG. 3, is a means 21 for detecting the running state of a vehicle, a means 22 for detecting an empty load based on the load of a vessel, and a vessel in a raised position. 23, a cancel switch 24 for canceling the warning operation, a means 25 for issuing a warning on the condition that the empty vessel is rising while the vehicle is traveling, and the cancellation of the warning operation. Means 26 for forcibly lowering the vessel when not released via switch 24.

As shown in FIG. 4, the second invention comprises means 21 for detecting the running state of the vehicle, means 27 for detecting the release of the side brake, and means 22 for detecting an empty load from the load on the vessel. , A means 23 for detecting that the vessel is in the raised position, a cancel switch 24 for releasing the warning operation, and a condition that the empty vessel is raised when the side brake is released while the vehicle is stopped. And a means 29 for prohibiting the depression operation of the accelerator pedal when the warning operation is not canceled via the cancel switch 24.

According to a third aspect of the present invention, in the second aspect of the present invention, when the warning operation is canceled via the cancel switch after the depression operation of the accelerator pedal is prohibited, the depression operation of the accelerator pedal is permitted, and when the warning operation is not released, the vessel is depressed. Equipped with means for forcibly lowering.

According to a fourth aspect of the invention, means for detecting the running state of the vehicle, means for detecting the release of the side brake, means for detecting an empty load from the load on the vessel, and detecting that the vessel is in the raised position. Means, a cancel switch for canceling the warning operation, a means for issuing a warning on the condition that the empty vessel is rising while the vehicle is traveling, and a time when this warning operation is not canceled via the cancel switch. A means for forcibly lowering the vessel, a means for issuing a warning when the side brake is released while the vehicle is stopped and a condition that the empty vessel is rising, and a cancel switch for this warning action. And means for prohibiting the accelerator pedal from being depressed when not released.

[0011]

According to the first aspect of the invention, if the vehicle is run while the empty vessel is raised, a warning is given to the driver and the vessel is forcibly lowered when attempting to run as it is. To be made. When the driver recognizes the warning and operates the cancel switch, the vessel is intentionally raised, so the vehicle is allowed to travel with the vessel raised.

In this way, it is possible to prevent the empty vessel from traveling while being raised, and to prevent a collision or the like.

According to the second aspect of the present invention, before the vehicle starts traveling, a warning is given to the driver if the empty vessel is still raised, and if the release operation is not taken in response to this warning, the accelerator is released. Prohibit pedal depression and stop the vehicle starting operation.

When the driver operates the cancel switch in response to the warning, the depression prevention of the accelerator pedal is released to enable normal traveling.

In the third invention, when the abnormality is recognized based on the prohibition of the depression operation of the accelerator pedal and the warning operation is canceled through the cancel switch, the depression operation of the accelerator pedal is permitted and the starting operation is possible. Next to
On the other hand, when the warning operation is not canceled, the vessel is forcibly lowered to avoid starting with the vessel raised.

According to the fourth aspect of the invention, when the vehicle is run while the empty vessel is raised, the driver is warned.
Despite this, when trying to drive as it is,
The vessel is forced to descend.

Before the vehicle starts traveling, a warning is given to the driver when the empty vessel is still raised, and the accelerator pedal is depressed when the releasing operation is not taken in response to this warning. Prohibit and stop the starting operation of the vehicle.

In this way, the running of the vehicle with the empty vessel raised or the start of the vehicle from the stopped state is reliably prevented.

However, in both cases, when the driver recognizes the warning and operates the cancel switch, the vessel is intentionally raised so that the vehicle can be run with the vessel raised.
Or allow start.

[0020]

EXAMPLES Examples of the present invention will be described below. In FIG. 1, 1 is a dump truck, 2 is a vessel, and a vessel 2
Is moved up and down by operating the vessel switch 4 provided in the driver's seat 3.

The driver is warned so that the vehicle is not allowed to run without dropping the vessel 2, and if the driver does not take an appropriate measure by recognizing the warning, the vessel 2 is forced to run. An abnormality avoidance device 5 is provided for unloading or disabling traveling.

The abnormality avoidance device 5 includes a control unit composed of a microcomputer, a vehicle speed sensor 7 for detecting a vehicle speed, a side brake position sensor 8 for detecting a side brake operation, and a vessel 2 being raised. Vessel lift sensor 9 for detecting, empty sensor 10 for detecting that the vessel 2 has become empty from the load of the vessel 2
From the cancel switch 11 for confirming the warning operation.

On the basis of these signals, the abnormality avoiding device 5 activates a warning display device (voice warning) 13 to warn the operator if the vessel 2 is forgotten to be dropped by a control operation as shown in the flowchart of FIG. Furthermore, Vessel 2
Is forcibly lowered or the accelerator pedal depressing operation prohibiting device 14 is operated to disable the vehicle from traveling at a certain speed or more. The accelerator depressing operation prohibiting device 14 is composed of an air cylinder or the like that prevents depression of the accelerator pedal.

The control operation executed by the abnormality avoidance device 5 will be described with reference to FIG.

First, in step 1, it is judged from the output of the vehicle speed sensor whether or not the vehicle is running, and if it is running, in step 2 it is judged from the output of the empty sensor whether or not the loading platform is empty. When it is empty, the routine proceeds to step 3, where it is determined whether or not the vessel 2 is in the raised position. If it is in the raised position, the warning display device 13 is activated in step 4 to issue a warning.

The warning display device 13 automatically stops within a few seconds, and after this warning, it is determined in step 5 whether the cancel switch 11 is turned on. The cancel switch 11 is operated by the driver, and when the driver turns the cancel switch 11 on, such as when the driver intentionally runs while raising the vessel, a series of warning operations is terminated.

However, when the cancel switch 11 is off, it is determined that the driver does not notice and the vessel is forcibly lowered in step 6.

When the vessel up position sensor is off in step 3 above, the vessel is lowered, so
The operation ends as it is.

On the other hand, when the vehicle is not traveling in step 1, the routine proceeds to step 7 and thereafter. First, check the side brake switch in step 7, and if the side brake switch is off, that is, if you are willing to drive, use switch 8 to check if the output is empty or not Check the output of the ascending position sensor to see if the vessel is ascending.

When the vessel is empty and the vessel is rising, the warning display device 13 is activated in step 10 to warn the driver (also in this case, the vehicle automatically stops in a few seconds). If either is different, the process returns to step 7 and the same operation is repeated.

After the warning, the cancel switch 11 is confirmed in step 11. If the cancel switch 11 is turned on, the driver recognizes that the vessel is in the raised position, and a series of warnings is given. Stop the operation.

On the other hand, when the cancel switch 11 is off, the accelerator pedal depressing operation prohibiting device 14 is operated in step 12 to prevent the accelerator pedal from changing from the idle state. In this state, even if the driver tries to start the vehicle, the accelerator pedal cannot be depressed and the vehicle cannot be started smoothly.

Next, in step 13, the cancel switch 11 is confirmed again. If the cancel switch 11 is on, that is, if the driver recognizes all the states,
In step 15, the accelerator pedal depression operation prohibiting device 1
Release the operation of 4 and enable normal running.

If the cancel switch 11 remains off in step 13, the process proceeds to step 14 to forcibly lower the vessel, and then the process proceeds to step 15.

With the above arrangement, the overall operation will be described.

First, when the raw materials and the like are lowered while the vessel 2 is being raised and running slowly, the traveling is allowed as it is until the vessel 2 is emptied, and unloading can be performed while the vessel 2 is running. However, when empty, vessel 2
Check the position of, and if the vessel 2 is lowered,
Although the vehicle is allowed to travel as it is, when the vessel 2 is in the raised position even though the vessel 2 is empty, a warning is first issued to the driver.

On the other hand, if the driver recognizes the warning and turns on the cancel switch 11, it is determined that the vessel 2 is intentionally kept up or the vessel 2 is subsequently lowered. Control ends.

However, if the cancel switch 11 does not turn on despite the warning, it is determined that the driver has not noticed and the vessel 2 is forcibly lowered.

In this way, the vessel 2 is prevented from traveling without noticing that the empty vessel 2 is rising, and in that case, the vessel 2 is forcibly lowered to prevent the vessel 2 from moving. Prevent from hitting the beams in the factory.

On the other hand, before the running of the vehicle is started, it is determined whether the vessel 2 is empty or in the ascending position when the side brakes are released, and if the vessel 2 is still empty, a warning is given. And waits for the confirmation of the driver by the cancel switch 11.

When the driver confirms, the control is terminated as it is, but when not recognized, the accelerator pedal is temporarily depressed in order to prevent the starting operation.

From this, the driver recognizes that the vessel 2 is still raised, and the cancel switch 1
When 1 is turned on, normal starting is possible.

If the cancel switch 11 is not turned on even though the vehicle cannot start, the vessel 2 is forcibly lowered and then the vehicle is ready to start.

In this way, the empty vessel 2 is surely prevented from traveling in an abnormal state in which the vessel 2 is raised,
To prevent collision with the structure.

[0045]

According to the first aspect of the invention, means for detecting the running state of the vehicle, means for detecting an empty load from the load on the vessel, means for detecting that the vessel is in the raised position, and warning operation A cancel switch to release the alarm, a means to issue a warning on condition that the empty vessel is rising while the vehicle is running, and a forced drop of the vessel when the warning operation is not canceled via the cancel switch. If you drive the vehicle while the empty vessel is still raised, the driver will be warned and the vessel will be forced to descend when you try to continue. Also, when the driver recognizes the warning and operates the cancel switch, the vessel is intentionally raised, so it is permissible to drive with the vessel raised. In to the driver unless the intentionally performed, prohibits the running of the left to increase the empty vessel, the vessel is possible to prevent a colliding like the beam.

According to the second aspect of the present invention, the means for detecting the running state of the vehicle, the means for detecting the release of the side brake, the means for detecting an empty load from the load on the vessel, and the vessel in the raised position. Means, a cancel switch for canceling the warning operation, a means for issuing a warning on condition that the empty vessel is rising when the side brake is released while the vehicle is stopped, and this warning operation Since it is provided with means for prohibiting the accelerator pedal depression operation when it is not released via the cancel switch,
Before the vehicle starts traveling, if the empty vessel is still raised, a warning is given to the driver.If the release action is not taken in response to this warning, the accelerator pedal is prevented from being depressed and the vehicle Since the start operation is stopped, running with the vessel raised is prohibited, and it is possible to avoid the vessel from colliding with the beam etc.Also, the driver operates the cancel switch in response to the warning, and the vessel intentionally When the vehicle is required to be driven while the vehicle is being raised, the prohibition of depression of the accelerator pedal is released and normal traveling is enabled, so operability is also improved.

According to the third aspect of the invention, when the accelerator pedal depression operation is prohibited and the warning operation is canceled through the cancel switch, the accelerator pedal depression operation is permitted, and when the warning operation is not released, the vessel is forcibly forced. Since it is equipped with a means for lowering it, when the abnormality is recognized based on the prevention of depression of the accelerator pedal and the warning operation is canceled via the cancel switch, the normal starting operation becomes possible. If is not released, you can force the vessel to descend and avoid starting with the vessel raised.

According to the fourth aspect of the invention, the means for detecting the running state of the vehicle, the means for detecting the release of the side brake, the means for detecting an empty load from the load on the vessel, and the vessel in the raised position. Detecting means, a cancel switch for canceling the warning operation, a means for issuing a warning when the empty vessel is rising while the vehicle is traveling, and a warning switch for not canceling the warning operation. Sometimes, the means to forcibly lower the vessel, the means to issue a warning on condition that the empty vessel is rising when the side brake is released while the vehicle is stopped, and the cancel switch for this warning operation It is equipped with a means for prohibiting the accelerator pedal from being depressed when it is not released via the Is warned, and the vessel is forced to descend when attempting to continue, and if the empty vessel remains up before the vehicle starts traveling, When a warning is issued to the driver and the release operation is not performed in response to this warning, the accelerator pedal is prohibited from being depressed and the starting operation of the vehicle is stopped, and thus the vehicle with the empty vessel raised is raised. While surely preventing the vehicle from starting from the running or stopping state, it is possible to improve operability by allowing the vehicle to run or start when the driver intentionally raises the vessel while recognizing the warning. it can.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a flowchart showing a control operation.

FIG. 3 is a configuration diagram showing a configuration of the present invention.

FIG. 4 is a configuration diagram showing another configuration of the same.

[Explanation of symbols]

 1 Dump truck 2 Vessel 5 Abnormality avoidance device 7 Vehicle speed sensor 8 Side brake position sensor 9 Vessel lift position sensor 11 Cancel switch 13 Warning display device 14 Accelerator depression operation prohibition device

Claims (4)

[Claims] 1. A means for detecting a running state of a vehicle, a means for detecting an empty load based on a load on a vessel, a means for detecting that a vessel is in a raised position, a cancel switch for canceling a warning operation, and a vehicle. It is provided with means for issuing a warning on condition that the empty vessel is rising during traveling of the vehicle, and means for forcibly lowering the vessel when this warning operation is not canceled via the cancel switch. And dump truck. 2. A means for detecting a running state of a vehicle, a means for detecting release of a side brake, a means for detecting an empty load from a load on a vessel, and a means for detecting that the vessel is in a raised position. A cancel switch for canceling the warning operation, a means for issuing a warning when the side brake is released while the vehicle is stopped and the condition that the empty vessel is rising, and this canceling the warning operation via the cancel switch. A dump truck, comprising: means for prohibiting a depressing operation of an accelerator pedal when not released. 3. A means for permitting the depression operation of the accelerator pedal when the warning operation is canceled via the cancel switch after the depression operation of the accelerator pedal is prohibited, and forcibly lowering the vessel when not released. The dump truck according to item 2. 4. A means for detecting the running state of the vehicle, a means for detecting the release of the side brake, a means for detecting an empty load from the load on the vessel, and a means for detecting that the vessel is in a raised position. A cancel switch to release the warning action, a means to issue a warning when the empty vessel is rising while the vehicle is running, and a force to force the vessel when this warning action is not released via the cancel switch. And a means to issue a warning on condition that the empty vessel is rising when the side brake is released while the vehicle is stopped, and when this warning operation is not released via the cancel switch A dump truck, further comprising: means for prohibiting a depressing operation of an accelerator pedal.