JPH05278991A - Alarm device for crane - Google Patents

Abstract

PURPOSE:To heighten safety further when a hanging cargo is hung up or hung down by means of a truck crane. CONSTITUTION:An alarm unit 6 is installed in a hanging hook 4 of a track crane 2 stopping at a work site 1 so as to be mountable/demountable, and a transmitter 7 is made to be carried by a slinging work person 9 to monitor the existence of an operator 8 working at a place 1L where steel products are slung up 3 by means of the hanging hook 4, and when it is necessary to notify the danger of the operator 8, the slinging work person 9 operates the transmitter 7, and an alarm output command signal is outputted from the transmitter 7 in radio. This alarm output command signal is received/decoded by means of a receiver of the alarm unit 6, and a relay device is operated, and a voice message corresponding to the alarm output command signal stored in an IC memory device of the alarm unit 6 is read, and is outputted from a loudspeaker 6d.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alarm device for a crane which gives a voice alarm to workers around a crane for lifting and lowering loads at a construction site, a container collection site, etc. ..

[0002]

2. Description of the Related Art Conventionally, cranes have been used for hoisting and unloading equipment and container cargo at construction sites, container collection and delivery sites, etc. We are doing hanging work. To ensure work safety, the crane driver or sling operator uses a hand microphone to call attention to nearby workers, or the crane driver operates a device in the cab to operate the cab. An alarm sound such as a siren is output from the speaker.

[0003]

However, in the conventional method using the hand microphone, the worker to be alerted is often located near the sling arm of the crane away from the sling worker or the cab of the crane. There was a problem that the voice of the slinging operator or the driver emitted from the handheld microphone could be difficult for the other operator to hear. Also, with the conventional method of outputting an alarm sound such as a siren from the speaker in the driver's cab, attention is distracted while listening to the alarm sound repeatedly, and the target person of the alarm is not clear, so the target work There was a problem that it was difficult to get the staff to pay attention certainly.

The present invention has been made in order to solve the above-mentioned problems, and its purpose is to reliably pay attention to workers in the vicinity of lifting and lowering of cargo by a crane. It is to provide an alarm device for a crane that can be prompted.

[0005]

An alarm device according to the present invention is provided on a hanging hook of a crane, and outputs an audio alarm when an alarm output command signal wirelessly transmitted from the outside is received, and an alarm unit. A transmitter provided separately from the alarm unit and wirelessly transmitting the alarm output command signal to the alarm unit by a predetermined operation.

Further, in the alarm device according to the present invention, the transmitter sends a plurality of types of alarm output command signals in accordance with its operation, and the alarm unit responds to the plurality of types of alarm output command signals. It is configured to output the voice alarm.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration explanatory view showing a state in which cargo handling work is being performed by a truck crane to which an embodiment of the present invention is applied. Reference numeral 1 denotes a work site having a step, and a truck crane 2 stops at a high place 1H of the work site 1 to hang a steel material 3.

The steel material 3 is slid on the hanging hook 4,
The suspension hook 4 is attached to a wire 5 that is unwound and wound from the tip of the arm 2a of the truck crane 2. An alarm unit 6 is detachably attached to the suspension hook 4. As shown in FIG. 2, the alarm unit 6 includes a receiver 6a which receives and decodes a coded alarm output command signal wirelessly transmitted from a transmitter 7 described later by a receiver 6a, and a decoded alarm output command. The relay device 6b which operates according to a signal is provided.

The relay device 6b is selected from a plurality of types of voice alarms stored in the IC storage device 6c in advance. For example, "Please do not enter the work range during unloading" and "Because it is dangerous." A desired voice message such as "Please be careful" or a siren sound for emergency is selected. In other words, it operates so as to address and read the voice alarm. The voice alarm read from the IC storage device 6c is amplified by an amplifier (not shown) and then output as voice from the speaker 6d. In FIG. 1, 8 is the lowland 1 of the work site 1.
It is a worker who works at the place of L.

On the other hand, the transmitter 7 is, as shown in FIG.
It is carried by a slinging staff 9 who is in a high place 1H of the work site 1. The slinging staff 9 is located within the working range in which the truck crane 2 stops and hoists and unloads the steel material 3, performs the slinging work of the steel material 3 on the suspension hook 4, and constantly lifts and suspends the steel material 3 by the truck crane 2. The unloading status and the presence or absence of safety for the worker 8 who works at the hoisting and hoisting place of the steel material 3 are monitored.

The transmitter 7 carried by the slinging staff 9
As shown in FIG. 3, the display unit 7 is provided on the upper surface of the main body of the transmitter 7.
a and an operation section 7b are arranged. The operation section 7b has a ten-key pad 7c for selecting a desired voice message from the various voice alarms stored in the IC storage device 6c of the alarm unit 6, and An emergency button 7d is provided to notify of a sudden danger.

By appropriately operating the ten-key pad 7c and the emergency button 7d, the IC storage device 6 of the alarm unit 6
The warning output command signal corresponding to the above various voice messages stored in c and the emergency warning output command signal corresponding to the siren sound for emergency are coded, and the antenna 7f
Is transmitted by radio from the alarm unit 6 to the alarm unit 6 side. The operation unit 7b is also provided with switches such as a power switch 7e, and the display unit 7a has various keys and operation contents of the switches of the operation unit 7b, such as the operated numeric keypad 7c and the emergency button 7d. Corresponding to, the contents of the voice alarm read from the IC storage device 6c of the alarm unit 6 are displayed.

Next, the operation will be described. Work site 1
Steel material 3 is slid on a hanging hook 4 of a truck crane 2 stopped at a height 1H of
In the state where the worker 8 is hanging on the lowland 1L where the work is performed, the slinging staff 9 who is monitoring the hanging condition of the steel material 3 tells the worker 8 in response to the descending operation of the arm 2a of the truck crane 2. In order for the alarm unit 6 to output an alarm for calling attention, the ten key 7c of the transmitter 7 is appropriately operated.

As a result, a coded alarm output command signal corresponding to the voice message stored in the IC storage unit 6c of the alarm unit 6 is wirelessly transmitted from the transmitter 7, and the alarm attached to the suspension hook 4 is transmitted. Receiver 6 of unit 6
It is received and decrypted by a. Then, the relay 6b of the alarm unit 6 is activated based on the decoded alarm output command signal, and the voice message corresponding to the alarm output command signal from the transmitter 7 is activated by the operation of the relay 6b.
The voice message is read out from c, amplified by an amplifier, and then output from the speaker 6d.

In a dangerous situation, such as when the steel material 3 or the hanging hook 4 is shaken by the wind, the emergency button 7d provided on the operation portion 7b of the transmitter 7 is operated,
The transmitter 7 transmits an emergency warning output command signal. Then, the receiver 6a of the alarm unit 6 receives and decodes this emergency alarm output command signal, the relay device 6b operates in the same manner as in the case of the above alarm, and the siren sound for emergency is output from the speaker 6d. To be done. A built-in battery is used as a power source for the alarm unit 6, and the alarm unit 6 is detached from the hanging hook 4 and replaced when charging or when the main body fails.

As described above, according to the crane alarm device of this embodiment, a voice message is output to call attention to the worker 8 who is working in the lowland 1L of the work site 1 where the steel material 3 is being hung. Since the alarm unit 6 is mounted on the hanging hook 4 of the truck crane 2, the distance between the speaker 6d of the alarm unit 6 and the worker 8 is gradually shortened as the steel material 3 descends, and the worker 8 hears. The volume of the voice message gradually increases, and compared with issuing an alarm buzzer at a fixed place, the worker 8 who is in the lowland 1L of the worksite 1 and the workers in the vicinity thereof will be surely alerted, and the accident will occur. It will prevent it and increase safety.

Even when the steel material 3 is transported by the high-altitude truck crane 2 to the blind spot of the slinging staff 9, the ten key 7c of the transmitter 7 is appropriately operated to transmit an alarm output command signal to the alarm unit 6. As a result, the alarm unit 6 can output a voice message calling for attention to the approach of the steel material 3 and the hanging hook 4 to the worker to whom the steel material 3 is conveyed, and safety can be ensured. That is,
Safety can be ensured regardless of whether the work place is high, low, or blind.

Although the transmitter 7 is carried by the slinging staff 9 in this embodiment, it may be operated by the driver of the truck crane 2, and the alarm unit and the transmitter are constructed as follows. The configuration is not limited to that shown in the embodiment.

[0019]

As is apparent from the above description, according to the present invention, the alarm output command signal wirelessly transmitted from the transmitter is received by the alarm unit provided on the hanging hook of the crane, and the alarm unit is activated. Since it is configured to output a voice alarm, it is possible to promptly alert workers in the vicinity of the work range to improve safety. Further, according to the present invention, the transmitter sends a plurality of types of alarm output command signals in response to the operation, and the alarm unit outputs a plurality of types of voice alarms corresponding to the plurality of types of alarm output command signals. Since it is configured, it is possible to give an accurate message according to the situation to the workers near the work range, which attracts attention compared to the monotonous siren sound and surely informs the worker of the danger. It is possible to ensure safety.

[Brief description of drawings]

FIG. 1 is a configuration explanatory view of a steel material unloading work situation by a truck crane equipped with a crane alarm device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of an alarm unit.

FIG. 3 is a front view showing a schematic configuration of a transmitter.

[Explanation of symbols]

 2 Truck crane (crane) 4 Lifting hook 6 Alarm unit 7 Transmitter

Claims (2)

[Claims] 1. An alarm unit which is provided on a hanging hook of a crane and which outputs an audio alarm when an alarm output command signal wirelessly sent from the outside is received, and an alarm unit which is provided separately from the alarm unit. An alarm device for a crane, comprising: a transmitter that wirelessly sends the alarm output command signal to the alarm unit by the operation of. 2. The transmitter transmits a plurality of types of alarm output command signals according to its operation, and the alarm unit outputs a plurality of types of voice alarms corresponding to the plurality of types of alarm output command signals. An alarm device for a crane according to Item 1.