JPS6062340A - Slewing type working vehicle - Google Patents

Abstract

PURPOSE:To raise the safety of a slewing type working vehicle by a method in which operating conditions of the circuit switcher for a slewing base control valve and also of the slewing base are detected, while operating conditions with the actuation of the slewing base are notified. CONSTITUTION:The first controller 13 to automatically operate a solenoid type control valve 11 for operating a slewing base 3 on the basis of information of the operating direction sensor 10 of an operating lever 9 is provided to the drive circuit 12 of the valve 11. The second controller 16 to automatically operate the valve 11 in such a way as to stop the base 2 on the basis of information from the vehicular angle sensor 14 and vehicular stop angle setter 15 for the base 2 and also to turn the base 2 is provided in parallel with the connection circuit between the controller 13 and the circuit 12. A switching condition sensor 20 is provided to a circuit switcher 17 to selectively connect the circuit 12 to the controllers 13 and 16. The information of the sensor 20 is transmitted to slewing alarm buzzers 24A and 24B having different sounds through AND circuits 21A and 21B, thereby leading a driver to re-confirm switching conditions.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is provided with a sensor that detects the operating direction of a control lever for a swivel base, and based on information from the sensor, an electromagnetic control valve for operating the swivel base in forward and reverse directions is connected to the control lever. a first controller that automatically operates in accordance with the operating direction of the operating lever, and the swivel base is swiveled in a direction that matches the operating state of the operating lever based on information from the first controller or the sensor; and , a second control valve that automatically operates the control valve so as to stop the swivel base at a set angle relative to the vehicle body based on information from a sensor for detecting an angle relative to the vehicle body of the swivel base and a stop angle setter relative to the vehicle body of the swivel base; A controller is provided, and a circuit switch is provided to selectively connect the control valve to the first and second controllers, and automatic swing control by the second controller improves work efficiency and cropping operation. This article relates to a swing-type work vehicle for various uses with improved performance.

Conventionally, in the above-mentioned swing-type work vehicle, even though the circuit switching device is connected to the first controller side, the knob is in the manual swing control state, the driver misjudges the switching state and switches the switch to the automatic swing control state. If the driver suddenly operated the lever and started turning, the turning would not automatically stop against the driver's wishes, which could lead to an unexpected accident.

In view of the above-mentioned circumstances, it is an object of the present invention to enable the driver to reliably recognize the switching state between the manual control state and the automatic control state at an appropriate timing.

A characteristic configuration of the present invention is that in the above-mentioned swivel type work vehicle, the operation state of the circuit switch and the swivel base is detected, and when the swivel base is started, the operation by either the first or second controller is performed. It is possible to install a device that notifies the driver of whether or not the vehicle is being affected, and its functions and effects are as follows.

With the above-mentioned configuration, it is possible to ensure that the driver recognizes the detection result of the switching state of the circuit switcher when starting the swivel base based on the detection of the operation state of the swivel base, and as a result, it is possible to ensure that the driver recognizes the switching state detection result of the circuit switcher when starting the swivel base. In such cases, the driver can take measures such as stopping the swing at an early stage, thereby avoiding unexpected accidents caused by misjudgment, which greatly improves the safety of swing-type work vehicles. We were able to.

Next, examples will be shown.

Fig. 1 shows a swivel type excavation vehicle as an example of a swivel type excavation vehicle; The swivel drive unit (2) is equipped with a tower driving unit (48) and a driving unit (5), and a working arm (6) that can be vertically swung and can be bent and extended. An excavation work device (8) configured by rotatably connecting an excavation packet (7) is installed at the tip of the excavation device (8).

To configure the swing operation mechanism, as shown in FIG. The operating direction and amount of operation of the operating lever (9) are detected based on the voltage information, and the electromagnetic proportional control valve 0υ, which operates the swing motor (3) in forward and reverse directions and controls the speed, is detected using the operating lever ( 9), the control valve αη drive circuit ( 2) A first controller α law is provided which automatically operates the voltage signal by giving it a voltage signal.

Then, based on the information from the first controller Q3, the swivel base (2) is rotated in a direction that corresponds to the operating state of the operating lever (9), and the angle (θ) of the swivel base (2) with respect to the vehicle body is detected. The swivel base (2) is stopped at the set angle relative to the vehicle body (θf) based on the information from the potentiometer-type sensor 电子, which sets the stopping angle relative to the vehicle body (θf=) of the swivel base (2). A second controller (which automatically operates the control valve Uυ by giving a voltage signal to the drive circuit @ to automatically operate the control valve Uυ to
II is provided in parallel with the circuit configuration connecting the first controller 0 and the valve drive circuit Q'4, and furthermore, the valve drive circuit (
b) to the eleventh and second controllers (2), a circuit switch a'i)t that selectively connects the CI to the first and second controllers a3
, ul and the valve) pivot circuit (2), and when the circuit switch Qη is switched to the first controller connection side, an artificial turning operation can be performed by operating the lever (9). In addition, when the switch is switched to the second controller QQ connection side, the operation of the lever (9) is a start command and a rotation direction instruction operation.
) is configured to be able to automatically turn and automatically stop at a predetermined position.

The electric circuit (g) connecting the circuit switch Qη and the valve drive circuit (6) is provided with a variable electric resistance that changes the voltage ratio between the signal voltage from the switch (171) and the input signal voltage to the drive circuit @. By installing a type regulator <11 and changing the setting of the maximum applied voltage of the pressure signal to input 1 to the valve drive circuit Q4, the maximum rotation due to the maximum operating range limit of the proportional control valve Uυ can be achieved. The structure is such that speed adjustment can be electrically easily and accurately performed for both manual turning operation and automatic turning control.

Based on the information from the switching state detection sensor (a) attached to the circuit switch Q''I), a reference signal is selectively sent to the pair of AND circuits (21A) and (21B) according to the switching state. A switching state determination circuit (a) is provided to send a signal, and a comparison signal for the reference signal is sent to each of the AND circuits (21A) and (21B) from the start of turning based on information from the first controller (2). Startup determination circuit (G)
At the same time, an operator inserts a pair of different turning alarm buzzers (24A) and (24B) into AND circuits (21A) and (21B) so that each one is activated when the input signal condition is satisfied. By separately connecting the buzzers (24A) and (24B) of different operators at the start of turning depending on the manual and automatic switching states, the driver can switch the switching state. This system is designed to remind the driver of the switching state and prevent unexpected accidents caused by the driver's misjudgment of the switching state.

Next, another example will be shown.

Control lever for swivel base by potentiometer αQ = (9)
Detects the operation direction and operation 1k, and based on the detection results, the first controller operates the magnetic proportional control valve Qυ to perform forward/reverse operation of the swivel base (2) and speed control operation. Instead of performing the It may be configured such that only the forward and reverse operations of the swivel base (2) are performed by switching the υ, and at least the operating lever (9
) The specific structure of the sensor (ll) that detects the operating direction of the control valve υ can be varied in various ways. Various improvements can be made to the circuit configuration.

A second controller (IQ) for automatic turning control is configured to be operated based on information from the operating direction detection sensor, instead of operating based on information from the first controller port. Also good.

As described above, the device (c) for notifying the driver of which of the first and second controllers 4 and Qt9 is to be operated includes two types of turning systems that operate selectively depending on the switching state. Instead of using the alarm buzzer (IA) or (24B), two types of lamps that are selectively lit, a lamp that lights only in one switching state, or a device that displays the switching state in text or voice, etc. , it is possible to apply various notification devices (goods).

In addition, a specific detection structure for operating the circuit switch a and the notification device (c) upon activation of the swivel base (2) based on the detection of the operation state of the swivel base (2), and an automatic Various improvements to the operating configuration are possible.

The present invention is directed to swing-type work vehicles for various uses, such as excavation work vehicles and crane work vehicles.

[Brief explanation of the drawing]

The drawings show an embodiment of the swing-type working vehicle according to the present invention, and the first
The figure is an overall side view of the swing-type excavation work vehicle, and FIG. 2 is a schematic diagram of the swing operation circuit. (2)...Swivel base, (9)...Operation lever, QO...Sensor, aυ...Solenoid control valve, (2)... ...First controller, a4...
... Body angle detection sensor, (G)... Stop angle setting device against the vehicle body, 4... Second controller, 燵η...
...Circuit switch, ■...Information system "O, (θ)
...Angle to the vehicle body, (θf)...Setting angle to the vehicle body.

Claims (1)

[Claims] A sensor αQ is provided to detect the operating direction of the swivel base operating lever (9), and an electromagnetic control valve Qη for operating the swivel base (2) in the forward and reverse directions based on information from the sensor Qt# is connected to the operating lever ( A first controller (to) is provided that automatically operates in a direction that corresponds to the operating direction of the operating lever (9), based on information from the first controller 0 or the sensor signal. The swivel base (2) is rotated based on the angle of the swivel base (2) relative to the vehicle body (ω detection sensor Q4 and the stop angle setter aG of the swivel base (2) relative to the vehicle body). A second controller Q is provided to automatically operate the control valve aη so as to stop the swivel base (2) at a set vehicle body angle (θf), and the control valve Oυ is controlled by the first and second controllers. The swivel work vehicle is equipped with a circuit switch αη that is selectively connected to the swivel base when the swivel base is started. The first and second controllers tia
, ttt9 is provided with a device for notifying the driver of which operation is to be performed.