JPH0885697A - Automatic sound alarm device of crane - Google Patents

Abstract

PURPOSE: To improve safety and to extensively mitigate metal fatigue of a director of slinging work by automatically selecting a sound alarm corresponding to contents of motion of a crane and informing it to a worker in the neighbourhood of a hook. CONSTITUTION: When driving motion of a crane is carried out by operating an operation lever, the contents of the motion is electrically detected by a detection means 13, an audio alarm corresponding to the motion contents of the crane is automatically selected and the sound alarm flows from a speaker 19 for monitoring to the inside of an operator room 4. In the meantime, it is transmitted as a wireless electric signal from a wireless transmitter 16 on the head end of a boom, it is caught by a receiver 17 on the side of a hook through a hook hanging space part where no obstruction exists, and it is informed as the audio alarm to a worker in the neighbourhood of the hook from the receiver 17. If the crane motion is slight in time at this time, only an alarm sound flows, but in the case when the same motion continues for more than specified time, sound information corresponding to the motion contents is carried out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, when operating a crane, issues a voice alarm corresponding to the operation contents of a boom or a hook from the hook to call attention to a worker near the hook. The present invention relates to a crane automatic voice alarm device.

[0002]

2. Description of the Related Art Generally, during crane work, a slinging conductor holding a radio transmitter / receiver confirms the safety of the surroundings and moves the hooks forward and backward due to the boom undulation and the operation of the winding device. The commands for lifting and lowering and turning of the hook due to the turning of the boom and boom are accurately transmitted to the crane operator by the wireless transceiver, while the operating status of the hook according to the above command is sent to other workers who work near the hook. I am trying to inform you by voice.

As an alarm device for this purpose, a device for storing a plurality of types of voice alarms corresponding to the operation contents of the crane near the hook and a wireless transmitter held by a conductor of the slinging work are sent. A receiver equipped with a speaker that emits a predetermined voice alarm in response to the signal is disclosed in, for example, Japanese Unexamined Patent Publication No. 5-278991 and Japanese Unexamined Patent Publication No.
It is known from JP-A-1010351.

According to these alarm devices, a voice alarm corresponding to the operation contents of the crane is directly emitted from the hook, so that a worker near the hook can easily hear the voice alarm rather than calling with a hand microphone. You can certainly call attention.

However, in the conventional alarm device, a ten-key pad or a voice selection button provided on a wireless transmitter is operated to select a voice alarm corresponding to the operation content of the crane, so For the commander of the work, while paying attention to the surrounding safety, while transmitting a complicated hook operation command (crane operation command) to the crane operator, delaying the operation of the numeric keypad etc. according to the operation content of the crane It is necessary to concentrate on various tasks such as without doing it at a time. Therefore, there is a possibility that the mental operation becomes extremely intense, and the operating state of the hook may be falsely reported due to an operation error of the transmitter.

[0006]

SUMMARY OF THE INVENTION In view of the above-mentioned conventional drawbacks, the present invention reduces mental fatigue of a slinging conductor, yet ensures false alarms of a hook operating condition to a worker near the hook. It is an object of the present invention to provide an automatic audible alarm device for a crane, which is highly reliable and which can be prevented and whose safety can be significantly improved.

[0007]

The technical means taken by the present invention to achieve the above object are as follows. That is, the automatic voice alarm device for a crane according to the present invention includes a detection unit that electrically detects the operation content of the crane, and a voice alarm corresponding to the operation content of the crane among the preset voice alarms based on the detection result. A voice transmission control means for selecting an alarm and outputting the voice warning signal is provided in the operator room of the crane, while a voice warning signal sent from the voice transmission control means through electric wiring is converted into a wireless electric signal. It is characterized in that a wireless transmitter for transmitting a signal is provided on the tip end side of the boom, and a receiver for converting a wireless electric signal sent from the wireless transmitter into a voice alarm to notify is provided in the vicinity of the hook.

[0008]

According to the above construction, when the operation content of the crane is electrically detected, a voice alarm corresponding to the operation content of the crane is automatically selected and transmitted as a wireless electric signal. It will be caught by the receiver near the hook and notified to the worker near the hook as a voice alarm.

In this case, it is conceivable that a radio electric signal corresponding to the selected voice alarm is directly transmitted from the operator room to the receiver near the hook. If an obstacle such as a steel frame or a concrete structure exists between the hook and the hook, there is a concern that the reliability of the alarm may be reduced due to unstable reception or increased noise.

In this respect, the present invention focuses on the fact that the hook is always located immediately below the boom tip and there is no possibility of an obstacle existing between the two, and a radio transmitter is installed at the tip of the boom. Since it is provided, the wireless electric signal is transmitted through the space for suspending the hook where no obstacle exists, and is reliably received by the receiver near the hook. Therefore, reception may become unstable due to obstacles,
Since the noise does not become relatively large,
Higher alarm reliability.

The operator's room is provided with a monitor speaker for the voice alarm and an operator microphone for transmitting voice through the receiver in priority to the voice alarm, so that the operator can operate the crane. Can be reconfirmed, and in an emergency, the operator can be directly warned by the voice of the microphone, so that the safety is further improved.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a tower crane. In this tower crane, a swivel base 2 capable of swiveling 360 degrees is provided on the upper part of a tower 1, and a boom 3 and an operator chamber 4 capable of undulating are arranged on one end side of the swivel base 2 to provide a swivel base
A balance weight 5 is provided on the other end of the swivel base 2, and a winding means 8 for winding and unwinding the suspension wire 7 having a hook 6 connected to the lower end thereof is mounted on the swivel base 2.

Inside the operator room 4, as shown in FIG. 2, a crane control panel 9 and a crane operating device associated therewith, for example, a boom 3 is raised and lowered by an operation in the front-rear direction and an operation in the left-right direction. Boom 3 to swivel 2
An operating lever (not shown) for turning the entire wire and an operating lever (not shown) for winding and rewinding the suspension wire 7 are provided, and further, a radio transmitter / receiver held by the conductor of the slinging work. Through (see FIG. 1) 10 there is provided a wireless transceiver 11 for the operator to receive remote crane operation commands.

The above tower crane is equipped with the following automatic voice alarm device 12. That is, the automatic voice alarm device 12 detects the operation content of the crane from the detection means (see FIG. 3) 13 that electrically detects the operation content of the crane and the voice alarm preset based on the detection result. The voice transmission control means 14 for selecting the corresponding voice warning and outputting the voice warning signal is provided in the operator room 4 of the crane, while the voice transmission control means 1 is provided.
4 is provided at the tip of the boom 3 to convert a voice alarm signal sent via the electric wiring 15 into a radio electric signal and transmit the radio electric signal, and the radio electric signal sent from the radio transmitter 16 is voiced. Receiver 1 that converts into an alarm and notifies
7 is provided in the vicinity of the hook 6 (for example, a pulley portion above the hook 6).

More specifically, the detection means 1 will be described.
3 is configured by utilizing the contacts of the crane control panel 9, and as shown in FIG. 3, the hook 6 is hoisted or unwound, the boom 3 is swung right or left, or undulated. Operate the operating lever to move the crane operation switch SW ₁
Connecting to SW _6, and at the same time the desired crane operation is started, the relay R ₁ to R ₆ which corresponds to the operation switch SW ₁ to SW ₆ is energized, the relay contacts a~
When f is closed, a required control signal is input to the voice transmission control means 14, and an electric signal for a voice alarm corresponding to the crane operation is output from the voice transmission control means 14. Reference numeral 18 is a relay box, which is provided in the operator room 4 together with the voice transmission control means 14.

The voice transmission control means 14 is constituted by using a voice synthesizing device (which may be constituted by using a recording device such as a tape recorder) by an integrated circuit.
As shown in Table 1, a voice alarm corresponding to the operation content of the crane is selected from a plurality of preset voice alarms based on the detection result of the detection means 13, and the voice alarm signal is output. It is like this.

As the voice alarm, for example, as shown in Table 1, first, an alarm sound such as a bell sound is given for a short time (for example,
When the boom 3 turns after it has flowed for 3 seconds, the voice "synthesized voice" saying "The suspended load will turn. Please be careful." Is given for a predetermined time (for example, 8 seconds) when turning to the left or right. ) When moving and moving the hook 6 up and down, the voice (synthetic voice) saying, "Please lift the suspended load. Please be careful." Or "Please lower the suspended load. Please be careful." 8 seconds), and when the boom 3 is up and down, the voice (synthetic voice) "Hold the load. Please be careful." Or "Keep the load. Please be careful." , 8 seconds). When the same crane operation is continued, the above alarm sound and voice (synthetic voice) repeatedly flow, and when the hook 6 or the like is slightly operated (within 4 seconds in this embodiment), only the alarm sound is emitted. Is flowing. When the boom 3 turns in either the left or right direction, the turning direction is not announced by voice so that the operator does not misunderstand the turning direction depending on the orientation of the worker near the hook. It was done.

[0018]

[Table 1]

Further, in this embodiment, the post-operation priority system is adopted by the circuit shown in FIG. 4, and there is a hook 6 such that the hook 6 is wound up while the boom 3 is turning. Even if it is in the middle of operation, when another operation is added to the hook 6, the voice alarm corresponding to the previous operation is interrupted and immediately another voice alarm (alarm sound and voice corresponding to another operation) Is flowing. In the post-operation priority method, for example, the boom 6 is raised and lowered while the swivel base 2 is swung, and further, the wire 7 is wound and unwound. It also works when matching is activated. In either case, a voice alarm corresponding to the last operation content is issued based on the detection result of the last operation content electrically detected.

Further, the operator room 4 is provided with a speaker 19 for monitoring a voice alarm connected to the voice transmission control means 14 and a microphone 20 for an operator for transmitting a voice through the receiver 17. Then, in an emergency, turn on the switch 21 of the microphone 20.
By doing so, the operator is allowed to directly and artificially transmit the voice in preference to all the above-mentioned voice alarms.

In FIG. 4, 22 is a logic circuit for outputting detection information of hook hoisting (hoisting hoisting), 23 is a logic circuit for outputting detection information of hoisting hoisting (hoisting hoist), and 24 is a boom right turn. A logic circuit that outputs (hanging load swing) detection information, 25 is a logic circuit that outputs detection information of boom left turn (hanging load swing), and 26 is a logic circuit that outputs boom raising (hanging load raising) detection information. Two
Reference numeral 7 is a logic circuit for outputting detection information of boom down (suspended load), 28 is an output circuit when the microphone switch 21 is turned on, and 29 is a voice synthesizer.

Incidentally, from the device parts provided in the operator room 4 to the radio transmitter 16 at the tip of the boom 3, AC100V is taken out from the power circuit of the crane and used as the power source for them, but the receiver 17 is The hook 6 moves up and down greatly, and in practice it is difficult to connect the wires, so a rechargeable battery is used as the power source, and the power is turned on by a control signal sent from the operator room 4 via the wireless transmitter 16.
・ It can be turned off. Also, the receiver 17
The battery of the above is regularly replaced with a charged battery, but in this embodiment, two batteries are attached to the operator room 4
From the control signal sent from the wireless transmitter 16 from
By using two batteries alternately, it is not necessary to replace the batteries for more than 5 days.

According to the above construction, when the operation lever is operated to perform the operation operation of the crane, the operation content is electrically detected by the detection means 13, and the voice alarm corresponding to the operation content of the crane is given. Is automatically selected, and a voice alarm flows from the monitor speaker 19 into the operator room 4, while it is transmitted as a wireless electric signal from the wireless transmitter 16 at the tip of the boom 3, and this is a hook hanging space where no obstacle exists. Through the section, the receiver 17 on the hook 6 side
Then, the operator near the hook 6 is notified from the receiver 17 as a voice alarm.

At this time, if the operation of the crane (a certain operation of the hook 6) is small in time, only the alarm sounds, but if the same operation continues for a certain time or longer, the operation content is changed. When the corresponding voice notification is made and the operation is further continued, the alarm sound and the voice notification are repeated.

In the above embodiment, a tower crane is used as an example of the equipment to be equipped with the automatic voice alarm device 13 for a crane. It goes without saying that it is possible.

[0026]

As described above, according to the present invention, the voice alarm corresponding to the operation content of the crane is automatically selected and transmitted as a wireless electric signal from the wireless transmitter on the boom tip side. Since it will be caught by the receiver near the hook and will be notified to the worker near the hook as a voice alarm, the conductor of the slinging work will pay attention to the surrounding safety and the crane operator The operation status of the hook can be changed due to a mistake in the operation of the transmitter, as in the case where various operations such as the operation of the numeric keypad according to the operation content of the crane are performed without delay while transmitting the operation command of There is no possibility of false alarms,
The safety is improved and the mental fatigue of the slinging conductor can be greatly reduced. In particular, in the present invention, since the wireless transmitter is provided on the tip side of the boom, the wireless electric signal is transmitted through the hook suspension space where no obstacle exists, and the above signal is received by the receiver near the hook. Will be received reliably, and the reception will not become unstable due to obstacles and noise will not increase, so
It is possible to realize a highly reliable automatic voice alarm device.

[Brief description of drawings]

FIG. 1 is a work explanatory view of a tower crane equipped with an automatic voice alarm device.

FIG. 2 is a schematic configuration diagram of an automatic voice alarm device.

FIG. 3 is a circuit diagram showing a configuration of detection means for electrically detecting the operation content of the crane.

FIG. 4 is a circuit diagram for providing a post-operation priority method.

[Explanation of symbols]

3 ... boom, 4 ... operator room, 6 ... hook, 13 ...
Detection means, 14 ... Voice transmission control means, 15 ... Electrical wiring,
16 ... Wireless transmitter, 17 ... Receiver.

Front page continuation (72) Inventor Yuzo Goto 1-22 Suehirocho, Kita-ku, Osaka City Japan Communication Ono Tokiki Co., Ltd.

Claims (2)

[Claims] 1. A detection means for electrically detecting the operation content of the crane, and a voice alarm corresponding to the operation content of the crane is selected from preset voice alarms based on the detection result, and the voice is output. A voice transmission control means for outputting an alarm signal is provided in the operator room of the crane, while a boom transmitter for converting a voice alarm signal sent from the voice transmission control means via electric wiring into a radio electric signal and transmitting the boom. An automatic voice alarm device for a crane, characterized in that a receiver provided on the tip side of the wireless transmitter for converting a radio electric signal sent from the radio transmitter into a voice alarm to notify the voice alarm is provided near the hook. 2. The operator room is provided with a speaker for monitoring the voice alarm, and an operator microphone for transmitting voice through the receiver in priority to the voice alarm. 1. An automatic voice alarm device for a crane according to 1.