JP2013001505A - Crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crane for preventing an operation by an erroneous operation.SOLUTION: Between a pendant switch 19 and respective drive units 9, 10 and 11, a controller 20 is provided including an output part 22 for outputting sound signals output from a sound input part 21 of the pendant switch 19 as operation signals corresponding to the operation contents of the drive units 9, 10 and 11 registered beforehand, and a comparison part 23 for making comparison of the operation signals output from push buttons 13-18 of the pendant switch 19 and outputting the operation signals to the corresponding drive units 9, 10 and 11 when they are the same operation signals. By pushing the push buttons 13-18 along the operation contents from the plurality of push buttons 13-18 of the pendant switch 19 and inputting sound along the operation contents, an operator confirms the operation contents of the crane 1 by the push buttons 13-18 and the sound, the erroneous operation is prevented.

Description

  The present invention relates to a crane in which a moving body is operated by a driving device controlled based on a signal output from an operation unit.

  Conventionally, in the crane as described above, the operation instruction signal (Patent Document 1) and the audio signal (Patent Document 2) output from the operation unit are registered in advance between the operation unit and the driving device. Output to the outside as a sound corresponding to the operation content, and a device configured to output to the drive device as a control signal corresponding to the operation content registered in advance, the operation content of the crane is determined by the signal output from the operation unit It is known that it can be confirmed by voice and the crane is operated.

Japanese Patent No. 445299 JP-A-2-286595

In Patent Document 1, a signal is output when the push button of the operation unit is pushed, and transmission of the signal is stopped by releasing the push. However, when the crane is installed in a noisy factory, if an operator misses the sound output to the outside, it is delayed to notice an error in the operation of the crane, and the pushbutton of the operation unit There was a possibility that the operation of the crane could not be stopped immediately because the release of the push-in was delayed. If the operation of the crane could not be stopped immediately, there was a problem that the hook member hit an operator in the factory or a transported object, or the transported object hit another object. In patent document 2, after confirming the operation | movement content of a crane with an audio | voice, a crane is operated according to an operation | movement content by outputting an audio | voice signal again. In addition, the operation unit is provided with a switch that causes the device to output a signal other than the audio signal, and outputs a signal other than the audio signal to the device that outputs the audio signal, thereby outputting a control signal based on the audio signal. It is supposed to stop. However, when an audio signal to be output again is erroneously recognized, an operator notices an error in the operation content of the crane, and it takes time until the control signal is stopped by the switch. There was a possibility that it could not be stopped.
In view of the above problems, an object of the present invention is to provide a crane that prevents an operation due to an erroneous operation.

  The present invention provides a crane in which a moving body is operated by a drive device controlled based on a signal output from an operation unit, and an operation member that outputs an operation signal corresponding to the operation content of the drive device is provided in the operation unit. An output unit provided between the operation unit and the drive device for outputting a sound signal output from a sound input unit provided in the operation unit as an operation signal corresponding to the operation content of the drive device registered in advance; A control device is provided that includes a comparison unit that compares the operation signal output from the operation unit and outputs the operation signal to the drive device when the operation signal is the same. The drive device is driven when the operation signal output from the signal and the operation signal output based on the audio signal are the same.

  In the present invention, the push button according to the operation content is pushed in from a plurality of push buttons of the pendant switch, and the sound according to the operation content is input, so the operator confirms the operation content of the crane with the push button and the sound. Therefore, an erroneous operation of the crane is surely prevented, and the hook member is prevented from hitting an operator or a transported object, and the suspended transported object is not hit against another object. Further, since the crane can be operated according to the operation content even in a factory with a high noise level, it is possible to reliably convey the conveyed product. Furthermore, even if either the operation signal from the push button or the sound signal from the pendant switch is erroneously recognized, if the two signals are not the same, the comparison unit does not output to each drive unit. Is prevented.

It is a figure which shows a crane. It is a block diagram of the crane shown in FIG.

  The moving body 2 of the crane 1 in FIG. 1 includes a girder 5 that can travel in a longitudinal direction (for example, east-west direction) of the building 4 along a traveling rail 3 provided on the ceiling, and a width direction of the building 4 along the girder 5. It comprises a trolley 6 that can traverse in the north-south direction (for example, the north-south direction) and a hoisting device 8 that is installed on the trolley 6 and can move the hook member 7 in the vertical direction. The devices 9, 10 and 11 are operated respectively. In addition, although the crane 1 of this embodiment is an overhead crane installed in the building 4, a stacker crane etc. may be sufficient, for example. A pendant switch 19, which is an operation unit including push buttons 13 to 18 exemplified as a plurality (six) operation members, is attached to the cable 12 hanging from the hoisting device 8. When the push buttons 13 to 18 are pushed in, an operation signal corresponding to the operation contents of the drive devices 9, 10, and 11 is output, and when the push is released, the output of the operation signal is stopped. In this embodiment, the east push button 15 causes the girder 5 to travel east of the building 4, the west push button 16 causes the girder 5 to travel west of the building 4, and the south push button 17 causes the trolley 6 to move to the building 4. The north push button 18 moves the trolley 6 in the north direction of the building 4, the upper push button 13 moves the hook member 7 upward, and the lower push button 14 moves the hook member 7 downward. It is set so that an operation signal to be moved is output. Between the pendant switch 19 and each of the driving devices 9, 10, 11, a control device 20 of an erroneous operation preventing device is provided. Further, the pendant switch 19 is provided with a voice input unit 21, and when any of the following six types of voices are input to the voice input unit 21: Each is output to the control device 20 as an audio signal.

  The control device 20 includes an output unit 22 that outputs an audio signal output from the audio input unit 21 of the pendant switch 19 as an operation signal corresponding to the operation contents of the drive devices 9, 10, and 11 registered in advance. The comparison unit 23 compares the operation signals output from the push buttons 13 to 18 of the pendant switch 19 and outputs the operation signals to the corresponding drive devices 9, 10, 1 when the operation signals are the same. Is provided. In the output unit 22 of the present embodiment, the audio signal (distortion) is output as an operation signal that causes the girder 5 to travel in the east direction, and the audio signal (Nishi) is output as an operation signal that causes the girder 5 to travel in the west direction. The voice signal (Minami) is output as an operation signal for traversing the trolley 6 in the south direction, the voice signal (kita) is output as an operation signal for traversing the trolley 6 in the north direction, and the audio signal (upper) is The hook member 7 is output as an operation signal for moving the hook member 7 in the upward direction, and the audio signal (doed) is output as an operation signal for moving the hook member 7 in the downward direction. The output unit 22 continues to output an operation signal corresponding to the previous audio signal until the next audio signal is output from the pendant switch 19. Therefore, by repeatedly pushing the push buttons 13 to 18 and releasing the push, the crane 1 is moved slightly.

  Next, the operation of the crane 1 configured as described above will be described. The operator first considers whether the girder 5, the trolley 6 or the hoisting device 8 is to be operated in order to move the transported object A on the floor surface F to the target location in the building 4, and its operation. The crane 1 is operated by pushing in the push buttons 13 to 18 of the pendant switch 19 according to the contents and inputting the sound corresponding to the push buttons 13 to 18 to the sound input unit 21 of the pendant switch 19. For example, when the trolley 6 in the state of FIG. 1 is traversed in the north direction of the building 4 and the hook member 7 is hung on the conveyed product A, the operator pushes the push button 18 on the north of the pendant switch 19 and An audio signal (coming) is output from the audio input unit 21 to the control device 20. When the operation signal corresponding to the audio signal (come) is output from the output unit 22 to the comparison unit 23, the operation signal is compared with the signal output from the push button 18, and when the same operation signal is determined, An operation signal is output from the comparison unit 23 to the driving device 10 that operates the trolley 6, causing the trolley 6 to traverse in the north direction. At this time, if the two signals are different, the trolley 6 does not traverse. Then, when the signal from the comparison unit 23 moves to above the conveyed product A, the push button 18 is released and the output of the signal is stopped. Subsequently, the lower push button 14 is pushed in, and an audio signal (done) is output from the audio input unit 21 of the pendant switch 19 to the control device 20. When the operation signal corresponding to the audio signal is output from the output unit 22 to the comparison unit 23, the operation signal is compared with the signal output from the push button 14, and when the same operation signal is determined, An operation signal is output from the comparison unit 23 to the driving device 11 that operates the hook member 7, and the hook member 7 is moved downward. As described above, if the two signals are different, the hook member 7 does not move. Thereafter, when the hook member 7 is moved to a predetermined position by a signal from the comparison unit 23, the push button 14 is released and the output of the signal is stopped. Thereafter, the stopped hook member 7 can be hung on the conveyed product A.

  As described above, the push buttons 13 to 18 corresponding to the operation content are pushed in from among the plurality of push buttons 13 to 18 of the pendant switch 19 and the sound corresponding to the operation content is input. Since the operation content is confirmed by voice with the push buttons 13 to 18, erroneous operation of the crane 1 can be surely prevented, and the hook member 7 is hit against the worker or the transported object A as in the past, or the transported object is suspended. I will not hit A against anything else. Moreover, since the crane 1 can be operated according to the operation content even in a factory with high noise, the conveyed product A can be reliably conveyed. Further, even if any one of the operation signals from the push buttons 13 to 18 and the audio signal from the pendant switch 19 is erroneously recognized, if the two signals are not the same, the comparison unit 23 sends the drive devices 9, 10, and 11 to each other. Since it is not transmitted, the operation of the crane 1 due to an erroneous operation can be prevented.

DESCRIPTION OF SYMBOLS 1 Crane 2 Girder 9-11 Drive apparatus 13-18 Push button 19 Pendant switch 20 Control apparatus 21 Voice input part 22 Output part 23 Comparison part

Claims (1)

In a crane in which a moving body is operated by a drive device controlled based on a signal output from the operation unit, the operation unit is provided with an operation member that outputs an operation signal corresponding to the operation content of the drive device. From the operation unit and an output unit that outputs an audio signal output from an audio input unit provided in the operation unit as an operation signal corresponding to the operation content of the drive device registered in advance between the operation unit and the drive unit A control device including a comparison unit configured to compare the output operation signal and output the operation signal to the drive device when the same operation signal is provided is output from the operation member of the operation unit A crane characterized in that the drive device is driven when the operation signal and the operation signal output based on the audio signal are the same.

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