JPH07165385A - Operation device for crane vehicle - Google Patents

Abstract

PURPOSE:To perform a safe slinging work by providing a operation member on the hook side to perform only operation to raise and lower the hook of a crane through a radio system. CONSTITUTION:In self-running, operation is effected as visual observation of each part is effected in the vicinity of a crane by a wire operation box 23 and a first radio compass transmitter 26. Thus, safe operation is practicable without colliding a man and an obstacle. During a slinging work, by operating a second radio compass transmitter 28 at a slinging place, a winch 15 is operated and a hook 13 is raised and lowered to elevate a suspension cargo. Besides, when the second radio compass transmitter 28 is operated, an operation system change-over switch 30 is changed over. Thus, since only a second radio compass receiver 25 is operated, revolution of a crane 16, rise and fall of a boom, and running of a running body 5 owing to malfunction are prevented from occurring. This constitution ensures safety even when a slinging work is executed in a slinging place where a crane vehicle is not visually observed. Further, when abnormality occurs, the hook 13 is immediately raised and lowered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a mobile crane.

[0002]

2. Description of the Related Art As a mobile crane, there is known one in which a crane is mounted on a vehicle body equipped with a traveling body so that the crane can swing freely by a turning mechanism. As a control device for this mobile crane, a control member is operated in a driver's cab installed on the vehicle body. It is known that a vehicle is controlled by a vehicle, a controller is provided on the vehicle body side, an operation box is connected to the controller, and an operation member of the operation box is operated to operate the vehicle.

[0003]

Since the above-mentioned conventional control device for a crane vehicle is operated by an operator while looking at the crane vehicle on or near the vehicle body, the safety during traveling and the safety during turning of the crane are ensured. Can be secured. However, when the crane hook hangs down for a long time and the hook cannot be seen from the vehicle body or near the vehicle body, the sling worker suspends the luggage on the hook (sliding work),
While monitoring the lifting situation, a signal is sent to the operator by a hand signal or the like, and the operator performs an operation of raising and lowering the hook according to the signal.

For this reason, an operator of the mobile crane and a slinging operator are required, and an error is likely to occur due to a signal exchange between the slinging worker and the operator, which may cause a malfunction. It is very dangerous and the slinging worker sends a signal when an abnormality occurs such as the hanging load is tilted, and the operator checks it before operating it, so there is a time loss from the occurrence of the abnormality until the crane operates. It may cause a serious accident such as dropping of a suspended load. Such a thing is likely to occur because it is more difficult to confirm the signal as the distance between the slinging place and the mobile crane is longer.

Therefore, it is an object of the present invention to provide a control device for a crane vehicle that can solve the above-mentioned problems.

[0006]

[Means for Solving the Problems] Vehicle body 4 provided with a traveling body 5
In a mobile crane in which the crane 16 is rotatably attached, a crane vehicle-side control member which is provided in the vicinity of the mobile crane and operates each operating portion of the entire mobile crane, and a raising / lowering operation of a crane hook by a wireless system A control device for a mobile crane equipped with a hook-side control member that only operates.

[0007]

[Operation] While traveling, you can operate the crane and the traveling body while watching the crane vehicle by the crane vehicle side operation member, so you can safely operate without colliding with people or obstacles. You can raise the hook while watching the hook with the control member, lower it to sling it, lift the suspended load, and lower it so that there is no mistaken operation.
In the event of an abnormality, the hook can be raised and lowered immediately, so it is possible to prevent the hanging load from falling and the sling work can be done safely.In the sling work, the hook can only be raised and lowered, and the crane can be accidentally turned. , It is safe to sling in a place where the crane cannot be seen because it does not travel on the moving body.

[0008]

[Examples] As shown in FIG. 1, a revolving structure 3 is rotatably attached to a vehicle body 1 by a first revolving mechanism 2 to form a vehicle body 4, and a crawler type traveling is provided on both sides of the vehicle body 1. A body 5 is attached so as to be expandable / contractible, and a crane main body 6 is rotatably attached by a second swing mechanism 7 at a position eccentric from the swing center of the swing body 3, and a boom 8 is erected on the crane main body 6 in a hoisting cylinder. The sheave 11 is attached to the most advanced movable boom 10 of the boom 8 that is mounted so that it can be raised and lowered freely.
The wire 12 is hung through the wire 12 and one end of the wire 12 is connected to the most advanced movable boom 10 via a sheave 14 having a hook 13. The other end of the wire 12 is a winch 15 provided in the crane body 6. The crane 16 is constructed by being wound up and unwound by.

A wired operation box 23 for outputting each operation signal is connected to the vehicle body 1, and the vehicle body 1 is provided with first and second radio control receivers 24 and 25. The receiver 24 is for weak current and each operation signal from the first radio controlled oscillator 26 is received by the first antenna 27, and the second radio controlled receiver 25 is for small power and is transmitted from the second radio controlled receiver 28. The second antenna 29 receives the up-and-down motion signal of the wired operation box 23, the first
Any one of the radio control receiver 24 and the second radio control receiver 25 is electrically connected to each controller described later by the operation system changeover switch 30.

As shown in FIG. 2, the wired operation box 23 and the first radio control receiver 24 include a boom raising switch 31, a boom fall switch 32, a boom extension switch 33, a boom contraction switch 34, a right swing switch 35, and a left swing switch. Three
6, brake switch 37, winch lower switch 38,
Winch switch 39, left front drive motor switch 4
0, a left rear traveling motor switch 41, a right front traveling motor switch 42, a right rear traveling motor switch 43, a high speed switch 44, and a low speed switch 45, and the first and second radio controlled oscillators 26 and 28 also have respective buttons. The second radio control receiver 25 is equipped with a winch upper switch 39.
And a winch lower switch 38.

As shown in FIG. 2, the wired operation box 23, the first radio control receiver 24, and the second radio control receiver 25 have a contact 51 of a first relay 50 and a contact 5 of a second relay 52.
3 and 3 are connected to and separated from the power source through the contact 55 of the third relay 54, and these first, second and third relays 50, 52,
Any one of 54 is connected to the power source by the operation system changeover switch 30, and by switching the operation system changeover switch 30, only one of them can be operated by the crane controller 4
6. Output a control signal to the traveling controller 47 and the winch controller 48.

Therefore, when the vehicle is self-propelled or the like, the wired operation box 23 and the first radio controlled oscillator 26 can be operated while visually observing each part in the vicinity of the crane vehicle, and the wired operation box 23 and the first radio controlled oscillator 26 can be operated. Becomes the control member on the crane vehicle side, and when slinging work, the second
By operating the radio-controlled transmitter 28, the winch 15 is operated to raise and lower the hook 13 to lift and lower the suspended load, and the second radio-controlled transmitter 28 serves as a hook-side control member. When the operation is performed, since the operation system changeover switch 30 is switched, only the second radio control receiver 25 operates, so that the crane is swung, the boom is extended / contracted, the boom is raised / lowered, or the traveling body 5 is traveled by an incorrect operation. It is safe to sling in a slinging place where the crane truck can not be seen,
Even if another person operates the wired operation box 23 and the first radio controlled oscillator 24 by mistake, it does not operate at all, which is safe.

The second radio control receiver 25 may have a wired circuit structure in which the second radio control receiver 25 has priority over the wire control box 23 and the first radio control receiver 24 without using the operation system changeover switch 30. The signal of the second radio controlled oscillator 28 may be used so that the first radio controlled receiver 24 does not receive the signal.

Alternatively, the second radio control receiver 25 may be omitted and only the first radio control receiver 24 may be provided, and the second radio control receiver 28 may be provided with only the winch raising switch and the winch lowering switch.

The crane vehicle-side control member may be either the wired operation box 23 or the first radio controlled oscillator 26. Although the crawler type crane is shown in the above embodiments, it goes without saying that any type may be used as long as it is a self-propelled crane.

[0016]

[Effects of the Invention] Since the crane and traveling body can be operated while looking at the crane vehicle by the crane vehicle side operation member during traveling, etc., it is possible to operate safely without colliding with people or obstacles.
At the time of slinging work, you can raise and lower the hook while watching the hook by the hook side control member at the slinging place, and you can lift and lower the sling, and you can lower it without mistaken operation. It can be prevented from falling and the slinging work can be done safely. In addition, since the hook can only be raised and lowered during slinging work and the crane will not be accidentally turned or the traveling body will not be traveled, it is safe to sling in a place where the crane vehicle cannot be seen.

[Brief description of drawings]

FIG. 1 is an overall schematic perspective view of a mobile crane.

FIG. 2 is an electric circuit diagram of a control system.

[Explanation of symbols]

4 ... Car body, 5 ... Running body, 16 ... Crane, 17 ... Controller, 24 ... First radio control receiver, 25 ... Second radio control receiver, 26 ... First radio control transmitter, 28 ... Second radio control receiver, 30 … Operation system selector switch.

Front Page Continuation (72) Inventor Hideyuki Takehara 3-20-1 Nakase, Kawasaki-ku, Kawasaki-shi, Kanagawa Co., Ltd. Komatsu Ltd. Kawasaki Plant

Claims (4)

[Claims] 1. A crane 16 mounted on a vehicle body 4 having a traveling body 5.
In a mobile crane that is mounted so as to freely rotate, a crane vehicle-side control member that is provided in the vicinity of the mobile crane and operates each operating part of the entire mobile crane, and only raises and lowers the hook of the crane wirelessly. A control device for a mobile crane, comprising a hook side control member. 2. The first radio control transmitter 26 and the first radio control receiver 24 serve as a crane vehicle side control member, and the second radio control transmitter 28 and the second radio control receiver 25 serve as a hook side control member. The control device for a mobile crane according to claim 1, further comprising means for causing a signal to be output from only the second radio control receiver 25 when the radio control transmitter 28 is operated. 3. The control device for a mobile crane according to claim 2, wherein the operation system changeover switch 30 for connecting one of the first radio control receiver 24 and the second radio control receiver 25 to a power source serves as the means. 4. A crane 16 mounted on a vehicle body 4 having a traveling body 5.
In a crane vehicle in which is freely swingable, a traveling controller 47 that outputs an operating signal of a traveling actuator, a crane controller 46 that outputs an operating signal of a crane actuator, and a winch that outputs an operating signal of a winch actuator. Hook controller 48 for receiving a signal from first radio control receiver 26 and a second radio control receiver 28 that receives signals from first radio control receiver 26 and outputs each operation signal to each controller. A control device for a crane vehicle provided with a second radio control receiver 25 that outputs only an up / down signal and an operation system changeover switch 30 that connects one of the first radio control receiver 24 and the second radio control receiver 25 to a power supply.