JPH01303291A - Crane operating device - Google Patents

Abstract

PURPOSE:To keep off any noise in a work field as well as to avoid an accident such as a crane collision or the like through accurate alarm transfer by setting up an alarm emitting a warning signal on crane operation in a floor control box as a small alarm buzzer. CONSTITUTION:An A crane travels and comes nearer to another B crame on the same travel rail, a state detector 7 detects a fact that this A crane has approached to it beyond the setting distance, therefore it outputs a signal. Consequently, a buzzer drive circuit receiving this signal inputs a driving signal into an alarm buzzer 26, making it sound, thus a warning takes place. This warning is carried out only at hand of an operator on a floor operating a floor control box 9A, whereby influence to others is less as little as negligible, so that such a possibility that noise pollution may affect other operators and make their working volition so as to lose is brought to nothing. In this connection, an overload warning and other warnings including a crane state are also able to utilize the alarm buzzer 26.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a crane operating device that allows a crane to transport steel frames and other heavy objects, and to warn of abnormalities or other conditions during crane operation. .

[Conventional technology]

Figure 4 is a schematic diagram showing a conventional crane operating device.
In the figure, 1 is a column installed in parallel in the workshop, 2 is a rail mounted on the top of the column 1, and 3 is a rail supported on the rail 2 by wheels 4 at both ends. 5 is a crane that travels on this moving rail platform 3; 6 is another crane installed on the same moving rail platform 3; and a status detector T is provided on this crane 6. There is. 8 is a warning device such as a loudspeaker that warns of the approach of both cranes 5 and 6 based on the detection signal of the condition detector γ; 9 is a floor operation box that commands the movement of the mobile rail platform 3 and the crane 5; Next, the operation will be explained.

In addition to a power switch and a power cut-off switch, the floor control box 9 is provided with command switches for each building that command the crane 5 to move in east, west, south, north directions, and in upward and downward directions. By operating the command switch after turning on the power switch, the movable rail platform 3 is moved onto the rail platform 2 and the crane 5 is moved onto the movable rail platform 3. For this reason, crane 5 bunched up on the plane and headed west.

It moves in either the south or north direction and stops at a predetermined position in either direction. Also, following this, the fishing metal fitting 10 at the end of the chain is hoisted up and rewound once again by the crane 5.
to raise and lower.

In this case, when the crane 5 approaches another crane 6, the condition detector 7 attached to this crane 6 detects the approach and outputs a signal, and based on this signal, the alarm 8 is activated. A loud warning sound such as a siren is emitted to alert operators on the floor that there is a risk of collision between the cranes 5 and 6.

[Problem to be solved by the invention]

Since the conventional crane operating device is configured as described above, if the distance between the alarm 8 on the crane 6 and the operator on the floor is 10 meters or more, the loudness of the above-mentioned alarm will be 80 phon. However, there were problems in that the alarm sound was bothersome to people other than the floor operator in the work area, and it reduced their motivation to work.

This invention was made to solve the above-mentioned problems, and provides a crane operating device that can suppress the alarm sound and reliably transmit the alarm sound only to the operator on the floor and those in the vicinity. The purpose is to obtain.

[Means to solve the problem]

The crane operating device according to the present invention includes an alarm buzzer as an alarm device that issues an alarm regarding an operational abnormality or condition of the crane, and the alarm buzzer is housed in a floor operation box.

[Effect]

The alarm buzzer in this invention is small and can be easily built into a floor operation box, and functions to emit an alarm only in the vicinity of the floor operator's hand, so as not to cause noise disturbance to the surrounding area.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 9A is a floor operation box used in this invention, and other components that are the same as those shown in FIG. On the other hand, as shown in FIG. 2, this floor control box 9A has a power switch 11. Power off switch 12. Upward switch 13. - Downward switch 14. East direction switch 15. West direction switch 16. A south direction switch 17 and a north direction switch 18 are arranged in parallel, and an alarm section 19 is further provided at one end of the floor operation box 9A.

FIG. 3 is a longitudinal sectional view of the floor operation box 9A shown in FIG. 2. In the figure, reference numeral 21 denotes a power supply box that outputs operation signals of the power supply switch 11 and the power cut-off switch 12 to a motor drive circuit (not shown). 22, 23, and 24 are control boxes that move the crane 5. It drives and controls the moving rail platform 3 and a motor (not shown). 25 is the floor operation box 9A
An alarm buzzer 26 is installed inside the floor operation box 9A where the sound emission holes 25 are located. This alarm buzzer 26 is connected to an alarm output control circuit (not shown) which outputs an alarm current based on the output of the condition detector 7. 27 is each power supply box 21. Each core wire connected to the control boxes 22 to 24 and the alarm buzzer 26 is led out of the floor operation box 9A as a cabtyre cable 28 which is bundled into two tubes.

Next, the operation will be explained.

First, the movable rail platform 3 is moved by operating the switches 11 to 18. The operations of the crane 5 and the chain 9 are completely the same as in the prior art, and redundant explanation thereof will be omitted here. On the other hand, when the crane 5 approaches another crane 6 on the same moving rail 3 due to the above operation, the status detector 7 detects that the crane 5 has approached beyond the set distance and outputs a signal. . Therefore, the buzzer drive circuit that receives this signal inputs a drive signal to the alarm buzzer 26, causes it to sound, and issues an alarm. This alarm is given only near the hand of the on-floor operator who operates the on-floor operation box 9A, and the influence on others is extremely small, which also helps to avoid gypsum pollution.

In the above embodiment, the condition detector 7 is used and the lane 5
, 6 has been described, but the present invention can also be applied to the case of issuing an overload warning, other lane condition warnings, and the same effects as those of the above embodiments can be obtained.

〔Effect of the invention〕

As described above, according to the present invention, the alarm device that issues a warning regarding crane operation is configured to be installed in the floor operation box as a small alarm buzzer, so it is possible to prevent noise in the workplace and to ensure reliable operation. This has the effect of ensuring that crane collision accidents can be avoided through warning transmission.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing a crane operating device according to an embodiment of the present invention, FIG. 2 is a front view showing a floor operating box in the crane operating device of FIG. 1, and FIG. 3 is a sectional view of the floor operating box. , FIG. 4 is a schematic diagram showing a conventional crane operating device. 5 is a crane, 7 is a condition detector, 9A is a floor operation box, 2
6 is a warning buzzer. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] A crane operating device comprising: a floor operation box for controlling and instructing the operation of the crane; a condition detector for detecting operational abnormalities and conditions of the crane; and an alarm for issuing an alarm based on the output of the condition detector. , the above-mentioned alarm,
A crane operating device characterized in that it is an alarm buzzer housed in the above-mentioned floor operation box.