JPH11100193A - Remote-control operation device for truck loading type crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To confirm a ground contact condition of an outrigger of a truck loading type crane in a portable type operation input part in a remote-control operation device of the truck loading type crane. SOLUTION: A truck loading type crane is provided with an outrigger ground contact condition detection means 16 which detects a ground contact condition of an outrigger 5 (5a, 5b, 5c) and a transmission means 17 which transmits the results of the detection of the outrigger ground contact condition detection means 16 on radio waves as an outrigger ground contact condition signal, and a portable type operation input part 14 in a remote-control operation device is provided with a display means 18 and a display signal output part 19 which receives the outrigger ground contact condition signal transmitted on radio waves from the transmission means 17 and outputs a display signal for operating the display means 18 in accordance with the contents received.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a remote control device for a truck-mounted crane.

[0002]

2. Description of the Related Art As shown in FIG. 2, a truck-mounted crane includes a base 1 mounted on a chassis frame between an operator's cab B of a truck A and a loading platform C, and a swivel drive on the base 1. A swivel 2 mounted on the swivel 2, an extendable telescopic boom 3 attached to the swivel 2 so as to be able to be driven up and down, and a suspender 4 hung at the end of the telescopic boom 3 so as to be driven up and down. . The base 1 is provided with a pair of left and right outriggers 5 and 5 that can protrude outward on the left and right sides of the track A and are grounded at the left and right positions.

The turning table 2 is driven to turn by a turning driving hydraulic actuator 7 that is driven and controlled by a turning control valve 6. The telescopic boom 3 is driven up and down by an up / down driving hydraulic actuator 9 driven and controlled by an up / down control valve 8, and is driven by a telescopic driving hydraulic actuator (not shown) driven and controlled by a telescopic control valve 10. It has become. The hoist 4 is driven by a hoisting unwind drive hydraulic actuator (not shown) that is driven and controlled by a hoisting unwinding control valve 11 that controls the hoisting unwinding drive. The control valves 6, 8, 10, 11 can be switched by operating lever groups 12, 12 arranged on the left and right positions of the base 1.

The pair of left and right outriggers 5, 5
Are the outer cylinder 5a provided on the base 1 and the outer cylinder 5
a hydraulic jack 5 having a grounding plate provided at the lower end of the inner cylinder 5b, the inner cylinder 5b being telescopically inserted into the inner cylinder 5b.
c. And each hydraulic jack 5c,
The expansion and contraction (grounding and storage) of 5c is driven and controlled by jack control valves 5d and 5d, respectively. The jack control valves 5d, 5d can be switched by operating lever groups 13, 13 arranged on both left and right sides of the base 1.

[0005] In such a truck-mounted crane, the hydraulic jacks 5d, 5d of the outriggers 5, 5 are extended and driven to ground the ground plate at the lower ends of the hydraulic jacks 5d, 5d to stabilize the truck A. , Crane work. The crane operation is performed by appropriately operating the operation lever groups 12 from the left and right positions of the base 1.

In recent years, in this type of truck-mounted crane, the driving of the crane can be controlled from an arbitrary position without directly operating the operation lever groups 12, 12 disposed at the left and right positions of the base 1. For this purpose, a remote control device for remotely operating the turning control valve 6, the up / down control valve 8, the telescopic control valve 10, and the hoisting / unwinding control valve 11 via a radio wave is provided. .

As shown in FIG. 3, the conventional remote control device for a truck-mounted crane is directly connected to a valve spool of a swing control valve 6, an up / down control valve 8, an expansion / contraction control valve 10, and a hoisting / lowering control valve 11, respectively. The valve driving means 6a, 8a, 10a, 11a for switching and driving these control valves, and the valve driving means 6a, 8a, 10a, 11 based on the operation of the operator.
a operation input unit 14 for transmitting an operation signal for driving a on a radio wave, and receiving an operation signal transmitted from the operation input unit 14 on a radio wave and responding to an operation signal related to reception. Valve driving means 6a, 8a, 10a, 11a
And a controller 15 that outputs a drive signal for driving the motor to corresponding valve drive means. The above-described conventional remote control device for a truck-mounted crane is extremely convenient because the crane operator can carry out the crane operation by carrying the operation input unit 14 and remotely controlling the truck-mounted crane from any position. .

[0008]

The crane operation using the remote control device is usually carried out by carrying the operation input unit 14 at a position away from the truck A. Track A at
However, there is a problem that it is difficult to detect the inclination of the truck A as a precursor of the fall of the vehicle. For this reason, there is a danger that the truck A may fall over due to the crane operation while forgetting to touch the outriggers 5 and 5 for stabilizing the truck A. (Operation lever group 1 arranged at the left and right positions of base 1
When a crane operation is performed by operating the trucks 2 and 12, the inclination of the truck A as a precursor of the fall of the truck A can be easily detected, but the crane operation using the remote control device is a precursor of the fall. The inclination of track A cannot be detected. Even if the outriggers 5 and 5 are grounded and the crane work is being performed, there is a risk that the truck A may fall due to excessively suspended loads. (Even in this case, it is not possible to detect the inclination of the truck A as a sign of the fall of the truck A, or the lifting (non-grounding) of one outrigger based on this inclination.)

[0009] These dangers can be eliminated if the operation input unit 14 of the remote control device can detect the grounding state of the outrigger. Therefore, an object of the present invention is to provide a remote control device that allows the operation input unit 14 to know the grounding state of the outriggers 5 and 5.

[0010]

SUMMARY OF THE INVENTION A remote control device for a truck-mounted crane according to the present invention is provided as an additional component to the conventional remote control device for a truck-mounted crane. Outrigger grounding state detecting means for detecting a grounding state, and transmitting means for transmitting the detection result of the outrigger grounding state detecting means on a radio wave as an outrigger grounding state signal are attached, and a display means is provided on a portable operation input unit. ,and,
A display signal output unit is provided for receiving an outrigger grounding state signal transmitted on a radio wave from the transmitting unit and operating the display unit according to the received content.

In the remote control device for a truck-mounted crane according to the present invention, the grounding state of the outriggers 5 and 5 detected by the outrigger grounding state detecting means provided on the truck-mounted crane is transmitted by the transmitting means (truck). It is displayed on the display means provided on the operation input unit via the display signal output unit (disposed on the operation input unit) and the display signal output unit (disposed on the operation input unit). The grounding state of the outriggers 5 and 5 can be confirmed by the display on the display means.

Therefore, there is a danger that the truck A will be overturned by forgetting the grounding of the outriggers 5 and 5 for stabilizing the truck A, and that the crane operation will be performed with the outriggers 5 and 5 grounded. In this state, the danger of the truck A falling over by suspending an excessively heavy load can be eliminated as much as possible.

As the outrigger ground contact state detecting means, detecting means for detecting the presence or absence of the supporting force of the outriggers 5 and 5 or detecting means for detecting that the supporting force of the outriggers 5 and 5 has fallen below a predetermined value. As the display means, a liquid crystal display means for displaying the detection result of the outrigger grounding state detecting means (the grounding state of the auritoga 5, 5) so as to be visually discernable, or a buzzer or a sound alarm means may be used. it can.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION

(Embodiment) An embodiment of a remote control device for a truck-mounted crane according to the present invention will be described below with reference to FIG. The remote control device for a truck-mounted crane according to the present invention has the following configuration added to the conventional remote control device shown in FIG. 3 and described above. 1. The outrigger grounding state detecting means 16, 1 for detecting the grounding state of the outriggers 5, 5 in the truck-mounted crane.
6, and the outrigger grounding state detecting means 16, 1
A transmitting means 17 for transmitting the detection result of No. 6 as an outrigger ground state signal on a radio wave and attaching the signal is attached. 2. The portable operation input unit 14 has a display unit 18 and a display for receiving an outrigger grounding state signal transmitted from the transmission unit 17 in a radio wave and operating the display unit 18 according to the received content. The signal output unit 19 is attached.

The auritoga grounding state detecting means 16, 1
Reference numeral 6 may be a detecting means for detecting the presence or absence of the supporting force of the outriggers 5 and 5 or a detecting means for detecting that the supporting force of the outriggers 5 and 5 has dropped below a predetermined value. In the former case, limit switches 16a, 16 are provided at the outer ends of the outer cylinders 5a of the outriggers 5, 5 and detect a change in the vertical relative position between the outer end of the outer cylinder 5a and the inner cylinder 5b.
a. When the outriggers 5 and 5 have no supporting force, the inner cylinder 5b deviates downward in the outer end of the outer cylinder 5a, and when the outriggers 5 and 5 have supporting force, the inner cylinder 5b deviates upward in the outer end of the outer cylinder 5a. Drop by. The limit switches 16a, 16a are arranged to detect this deviation. This limit switch 16
a and 16a are shown by solid lines in FIG.

In the latter case, the hydraulic chambers of the hydraulic jacks 5c, 5c of the outriggers 5, 5 are hydraulically connected to the extension-operation-side oil chambers (the supporting force holding side of the outriggers, not shown) to reduce the hydraulic pressure of the oil chambers. It comprises pressure switches 16b, 16b for detecting that the pressure has fallen below a predetermined value. This pressure switch 16
b and 16b are indicated by virtual lines in FIG.

The transmitting means 17 arranged at an appropriate place of the truck-mounted crane (specifically, at an appropriate place of the base 1) takes in the detection result from the outrigger ground detection means 16, 16 and puts it on a radio wave. It is something to send.

Next, the display means 18 attached to the portable operation input unit 14 and the display signal output unit 19 will be described.

First, a display signal output section 19 is provided. The display signal output section 18 is provided with an outrigger ground state signal (the outrigger ground state detection means 16, 16) from the transmitting means 17 disposed on a truck-mounted crane. (16
a, 16a or 16b, 16b) is received via an electric wave, and a display signal for operating a display unit 18 described later is output in accordance with the received content. is there. Display signal output unit 19
The display signal output from the display unit 18 informs the crane operator of the presence or absence of the supporting force of the outriggers 5, 5 or whether the supporting force of the outriggers 5, 5 is equal to or more than a predetermined value. Is a signal for

The display means 18 is actuated by a display signal from the display signal output section 19, and determines whether or not the support force of the outriggers 5, 5 is present, or whether or not the support force of the outriggers 5, 5 is equal to or more than a predetermined value. It is a signal for discriminatively informing the crane operator, and is specifically constituted by a liquid crystal display means or a lamp, a buzzer or an audio alarm means.

When the display means 18 is constituted by a liquid crystal display means or a lamp, the outriggers 5 and 5 are in a contact state (whether or not there is a supporting force of the outriggers 5 and 5 or the outriggers 5 and 5 are not connected).
(Whether or not the supporting force is equal to or more than a predetermined value) can be displayed so as to be discriminated and visible. Further, when the display means 18 is constituted by a buzzer or a sound alarm means, the outriggers 5 and 5 are grounded (the presence or absence of the support force of the outriggers 5 and 5,
Alternatively, whether or not the support force of the outriggers 5 and 5 is equal to or more than a predetermined value can be warned by a buzzer sound or a sound (a sound such as “the support force of the outrigger is insufficient”).

[0022]

According to the remote control device for a truck-mounted crane according to the present invention, it is difficult to detect a position remote from the truck-mounted crane, that is, the inclination of the truck A as a precursor to the fall of the truck A during crane operation. With the operation input unit 14 used at the position, the grounding state of the outriggers 5, 5 can be known through the display means 18 arranged on the operation input unit 14, so that the outriggers 5, 5 for stabilizing the truck A are provided. Danger of forgetting to touch the ground and causing the truck A to fall down due to the crane work, and even when the crane work is performed with the outriggers 5 and 5 grounded, the truck A falls due to excessively suspended loads. The danger to be caused can be eliminated as much as possible.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a remote control device for a truck-mounted crane according to the present invention.

FIG. 2 is an explanatory view of a truck-mounted crane.

FIG. 3 is an explanatory diagram of a conventional remote control device used for a truck-mounted crane.

[Explanation of symbols]

A: truck, B: operator's cab, C: cargo bed, 1; base, 2;
Swivel, 3; telescopic boom, 4; hanging tool, 5; outrigger,
5a, 5a; outer cylinder, 5b, 5b; inner cylinder, 5c, 5c; hydraulic jack, 6; swing control valve, 7; swing drive hydraulic actuator, 8; undulation control valve, 9; Telescopic control valve, 11; hoisting lowering control valve, 12, 12; operating lever group, 6a, 8a, 10a,
11a; valve driving means, 13, 13; operating lever group, 1
4; operation input unit, 15; controller, 16, 16; outrigger ground contact detection means (16a, 16a; limit switch, 16b, 16b; pressure switch), 17; transmission means, 18; display means, 19; Department,

Claims (5)

[Claims] 1. A base 1 having a pair of left and right outriggers 5 mounted on a chassis frame between a driver's cab B and a loading platform C of a truck A and extending right and left outside of the truck A at right and left positions and capable of grounding. A swivel 2 slidably mounted on the base 1, a telescoping boom 3 slidably mounted on the slewing base 2, and a retractable boom 3. A swing control valve 6 for controlling the drive of a swing drive hydraulic actuator 7 of the swivel 2 and a swing control valve for controlling the drive of a swing drive hydraulic actuator 9 of the telescopic boom 3. A valve 8, a telescopic control valve 10 for controlling the drive of a hydraulic actuator for telescopic drive of the telescopic boom 3, and a hoisting lowering control valve 11 for controlling the drive of a hydraulic actuator for driving the hoisting and lowering of the hanger 4.
And a valve driving means 6a, 8 attached to each of the control valves 6, 8, 10, 11 for switching and driving the corresponding control valve.
a, 10a, 11a, a portable operation input unit 14 for transmitting an operation signal for driving each of the valve driving means on a radio wave based on an operation of an operator, and an operation input unit 1
4 receives an operation signal transmitted on a radio wave, and according to the operation signal relating to the reception, valve driving means 6a, 8a, 10
a, a controller 15 for outputting a drive signal for driving the a, 11a to a corresponding valve drive means.
Outrigger grounding state detecting means for detecting the grounding state of, and a transmitting means for transmitting the detection result of the outrigger grounding state detecting means on radio waves as an outrigger grounding state signal, and attaching the portable operation input unit,
A display unit, and a display signal output unit that receives an outrigger grounding state signal transmitted from the transmitting unit on a radio wave and outputs a display signal for operating the display unit according to the received content. Remote control device for truck mounted cranes. 2. The outrigger contact state detecting means is a detecting means for detecting the presence or absence of the supporting force of the outriggers 5, 5, and the display means is configured to display the presence or absence of the supporting force of the outriggers 5, 5 in a distinguishable manner. The remote control device for a truck-mounted crane according to claim 1, wherein: 3. The outrigger contact state detecting means detects that the supporting force of the outriggers 5, 5 has fallen below a predetermined value, and the display means has the supporting force of the outriggers 5, 5 below a predetermined value. 2. The remote control device for a truck-mounted crane according to claim 1, wherein a display is provided so as to be able to determine whether or not the load is lowered. 4. The display means comprises liquid crystal display means or a lamp attached to a portable operation input unit, and a display signal output unit outputs the liquid crystal in response to an outrigger ground state signal relating to reception. 4. The remote operation of a truck-mounted crane according to claim 2 or 3, wherein a display signal for displaying the grounding state of the outriggers 5, 5 on the display means so as to be distinguished and visually recognizable is output. apparatus. 5. The display means comprises a buzzer or an audio alarm means for alarming that the outrigger is not grounded, and the display signal output section activates the buzzer or the audio alarm means as the display means in response to the outrigger ground state signal. The remote control device for a truck-mounted crane according to claim 2 or 3, wherein the remote control device is configured to perform the operation.