JP2006151621A - Abnormality diagnosis method and abnormality diagnosis device for footstep for passenger conveyor - Google Patents

Abnormality diagnosis method and abnormality diagnosis device for footstep for passenger conveyor Download PDF

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Publication number
JP2006151621A
JP2006151621A JP2004346206A JP2004346206A JP2006151621A JP 2006151621 A JP2006151621 A JP 2006151621A JP 2004346206 A JP2004346206 A JP 2004346206A JP 2004346206 A JP2004346206 A JP 2004346206A JP 2006151621 A JP2006151621 A JP 2006151621A
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Japan
Prior art keywords
rail
sound
forming
passenger conveyor
abnormality
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Pending
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JP2004346206A
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Japanese (ja)
Inventor
Tadashi Goshima
Kiyoshi Naganuma
Noriyuki Sahoda
Hiroshi Yamazaki
匡 五嶋
典之 佐保田
浩 山崎
清 長沼
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Hitachi Building Systems Co Ltd
株式会社日立ビルシステム
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Priority to JP2004346206A priority Critical patent/JP2006151621A/en
Publication of JP2006151621A publication Critical patent/JP2006151621A/en
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Abstract

Provided are an abnormality diagnosis method and an abnormality diagnosis device for a step for a passenger conveyor that can accurately and easily perform diagnosis of the presence / absence of an abnormality even in a passenger conveyor installed in a place with high environmental acoustics.
A step forming body is provided on a step rail, and a rear wheel of the step 9 passes through the step forming body 14 and the rear wheel 11 is dropped and collides with the step rail 10. By detecting the collision sound and comparing the collision sound with the normal sound stored in advance, it is diagnosed whether or not an abnormality has occurred in the step.
[Selection] Figure 3

Description

  The present invention relates to an abnormality diagnosis method for passenger conveyor steps and an abnormality diagnosis apparatus used for the abnormality diagnosis method.
This type of prior art includes a microphone that is provided at a step that circulates in the frame and receives sound during movement, a sound signal transmitter that transmits a sound signal converted from an electric signal of the microphone, Transmitting device equipped with a position signal transmitter for transmitting the position of the microphone, and a storage unit for receiving the transmission of the sound signal transmitter and receiving and storing the transmission of the position signal transmitter corresponding to the sound signal transmission position A calculation unit for comparing the received sound data from the sound signal transmitter stored in the storage unit with preset normal acoustic data, and the microphone position in the storage unit when the calculation value by the calculation unit exceeds a predetermined value Steps for passenger conveyors comprising a receiving device equipped with a central processing unit for outputting the output and an abnormality display means energized via the output of the central processing unit There has been known an apparatus for diagnosing whether or not an abnormality has occurred in a plurality of steps locked to an endless step chain by an abnormality diagnosis device (see, for example, Patent Document 1). .
JP 2002-68657 A (paragraph number 0006 to paragraph number 0019, FIGS. 1 to 3)
  However, passenger conveyors are often installed in places with high environmental sound, such as in stores where music is flowing or in stations where there is a lot of traffic. For this reason, in the above-described conventional technology, the environmental sound at the place where the passenger conveyor is installed is input to the microphone provided on the step, and therefore it is not possible to accurately diagnose the occurrence of the step abnormality. There was a problem.
  In view of the above-mentioned problems, the object of the present invention is to accurately and easily diagnose whether or not a step abnormality has occurred even when a passenger conveyor is installed in a place with a large environmental sound. An object of the present invention is to provide an abnormality diagnosis method for a passenger conveyor step and an abnormality diagnosis device used in the abnormality diagnosis method.
  In order to achieve the above object, the present invention detects sound generated when a plurality of steps locked to an endless step chain travels on a step rail, and detects the detected sound. In the abnormality diagnosis method for passenger conveyor steps, in which a step is detected on the step rail. A collision sound generated when a rear wheel of the step passes through the step formation body and the rear wheel falls and collides with the step rail is detected, and the collision sound and the normal sound stored in advance are provided. Is characterized in that whether or not an abnormality has occurred in the step is diagnosed.
  Furthermore, the present invention is characterized in that the step forming body is provided on an upper portion of the step rail located in the middle in the longitudinal direction of the passenger conveyor.
  Further, according to the present invention, a collision sound generated when the rear wheel of the step passes through the step forming body and falls and collides with the step rail is detected by an acoustic detection means including a magnetostrictive sensor. It is characterized by that.
  Furthermore, the present invention detects a step forming body provided on the step rail and collision sound generated when the rear wheel of the step passes through the step forming body and the rear wheel falls and collides with the step rail. To determine whether or not an abnormality has occurred in the step by comparing the sound detection means that performs the collision sound detected by the sound detection means and the normal sound stored in advance. The present invention is characterized in that it is an abnormality diagnosing device including a determination means for displaying a result.
  Further, the present invention provides a step forming body comprising a step forming inclined portion that forms an inclined surface along the longitudinal direction of the step rail and a mounting piece portion for attaching the step forming inclined portion to the step rail. It is characterized in that it is formed from a U-shaped member and a fastener provided on the mounting piece for detachably mounting the U-shaped member to the step rail.
  According to the present invention, even if a passenger conveyor is installed in a place with a large environmental sound, it is possible to accurately and easily diagnose whether or not an abnormality such as a crack in a step or a loose bolt is generated. It is possible to provide an abnormality diagnosis method and an abnormality diagnosis device for passenger conveyor steps that are made possible.
  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of an abnormality diagnosis method and an abnormality diagnosis apparatus for passenger conveyor steps according to the present invention will be described with reference to FIGS.
  A passenger conveyor 1 shown in FIG. 1 includes a frame 2, a driving machine 3 installed on the upper end side in the frame 2, a driving sprocket 4 fixed to a rotating shaft of the driving machine 3, and a driving sprocket 4. A wound drive chain 5, a step chain drive sprocket 6 installed on the upper end side of the frame 2 around which the drive chain 5 is wound, and an endless shape wound around the step chain drive sprocket 6 Step chain 7, a step chain driven sprocket 8 installed on the lower end side of the frame 2 around which the step chain 7 is wound, and a plurality of steps locked to the step chain 7 9 and a step rail 10 on which these steps 9 travel at least.
  As shown in FIG. 2, the step 9 includes a step frame 9A, a step plate 9B provided on the upper surface of the step frame 9A, a riser surface 9C provided on the front portion of the step frame 9A, and a step. A front wheel shaft provided on the front side of the frame 9A, a front wheel (not shown) rotatably provided on the front wheel shaft, and a rear wheel (following roller) 11 provided rotatably on the rear side of the step frame 9A; At least a locking member 9D for locking the front side of the step frame 9A to the step chain 7 is provided. The step 9 is locked by fastening the step chain 7 with the bolt 12 to the locking member 9D. In addition, the code | symbol C1 of FIG. 2 shows the crack which generate | occur | produced in the step frame 9A.
  As shown in FIG. 3, the abnormality diagnosis device 13 for diagnosing an abnormality in the step 9 of the passenger conveyor 1 includes a step forming body 14 provided on the step rail 10 and the step forming body 14 after the step 9. The sound detection means 15 for detecting the collision sound generated when the wheel 11 passes and then the wheel 11 falls and collides with the step rail 10 and the collision sound detected by the sound detection means 15 are stored in advance. It is comprised from the determination means 16 which determines whether abnormality has generate | occur | produced in the said step by comparing with normal sound, and displays the determination result.
  As shown in FIG. 4, the step forming body 14 attaches the step forming inclined portion 14 </ b> A- 1 forming an inclined surface along the longitudinal direction of the step rail 10 and the step forming inclined portion 14 </ b> A- 1 to the step rail 10. A U-shaped member 14A comprising a mounting piece portion 14A-2 for fastening, and a fastener 17 provided on the mounting piece portion 14A-2 for detachably mounting the U-shaped member 14A to the step rail 10. Formed from. The fastener 17 is formed of a nut 17A welded to the attachment piece 14A-2 and a fixing bolt 17B screwed to the nut 17A.
  As shown in FIG. 5, the sound detection means 15 is a magnetostrictive sensor formed of a magnet 15A, an iron core 15B, a coil 15C, and a lead wire 15E (see FIG. 3) connected to the coil 15C. Thus, it is attached to the back surface (lower surface) of the step rail 10. The attachment position of the sound detection means 15 is set as close as possible to the step forming body 14 attached to the step rail 10. Therefore, the magnetic resistance of the magnet 15A is changed by the collision sound generated when the rear wheel 11 of the step 9 falls through the step forming body 14 and collides with the step rail 10, and passes through the iron core 15B. Since the magnetic flux also changes, a signal (hereinafter referred to as a collision acoustic signal) extracted by the coil 15C changes. This collision acoustic signal is transmitted to the determination means 16 through the lead wire 15E.
  As shown in FIG. 3, the determination means 16 is connected to the lead wire 15E of the sound detection means 15 and amplifies the collision sound signal transmitted from the sound detection means 15, and the amplifier 18 amplifies the collision sound signal. The AD converter 19 that AD converts the collision acoustic signal, and the collision acoustic signal AD-converted by the AD converter 19 determines whether an abnormality has occurred in the step and displays the determination result Mobile personal computer 20 to be formed. The portable personal computer 20 performs frequency analysis on the collision acoustic signal AD-converted by the AD converter 19 and then performs a predetermined calculation. The collision acoustic power obtained by the calculation and the normal acoustic power stored in advance are calculated. A calculation unit that calculates a difference, a determination unit that determines whether an abnormality has occurred in the step 9 based on a calculation result of the calculation unit, a first storage unit that stores normal sound power, and a calculation unit A second storage unit that stores the calculation result and the determination result of the determination unit, and a screen display unit including a liquid crystal screen that displays the determination result of the determination unit.
  When the abnormality diagnosis work for the step 9 is performed using the abnormality diagnosis device 13 having the above configuration, the step forming body 14 is attached to the step rail 10 on which the rear wheel 11 travels. The attachment is performed by bringing the back side of the step forming slope 14A-1 of the U-shaped member 14A into contact with the upper surface of the step rail 10 and then fixing the mounting piece 14A-2 of the U-shaped member 14A. This is done by screwing the bolt 17B toward the back of the step rail 10. The position where the step forming body 14 is attached is the step rail 10 portion located in the middle in the longitudinal direction of the passenger conveyor 1.
  Then, the step forming body 14 is mounted on the step rail 10 when the step 9 is lowered, as shown in FIG. 6, the step H1 by the step forming inclined portion 14A-1 of the step forming body 14 is shown. Is attached to be formed on the descending side. Further, when the step 9 is operated to rise, as shown in FIG. 7, the step 9 is attached so that the step H <b> 1 by the step forming slope 14 </ b> A- 1 of the step forming body 14 is formed on the ascending side. Therefore, regardless of whether the step 9 is an ascending operation or a descending operation, the step 9 travels on the step rail 10 and the inclined surface of the step forming inclined portion 14A-1 of the step forming body 14 is obtained. When passing, the rear wheel 11 falls by the step H1 and collides with the upper surface of the step rail 10, thereby generating a collision sound.
  Therefore, the step 9 in a state where both the bolt looseness and the crack are not generated, the step 9 in a state where only the bolt is loosened, and the step 9 in a state where only the crack is generated As a result of experiments on what kind of impact sound is generated, the results shown in FIGS. 8 to 10 were obtained. That is, the rear wheel 11 of the step 9 in a state in which neither bolt loosening nor crack occurs, that is, the rear wheel 11 of the normal step 9 falls by the step H1 and the upper surface of the step rail 10 As the characteristics of the impact sound (hereinafter referred to as normal sound) generated when it collides with the sound wave, the characteristics shown in the raw waveform diagram of FIG. 8A and the frequency analysis diagram of FIG. 8B are obtained. It was.
  Further, the collision sound generated when the rear wheel 11 of the step 9 in the case where the bolt is loose falls by the step H1 and collides with the upper surface of the step rail 10 (hereinafter referred to as bolt looseness). The characteristics of the abnormal sound) were as shown in the raw waveform diagram of FIG. 9A and the frequency analysis diagram of FIG. 9B. As shown in the frequency analysis diagram of FIG. 9B, it can be seen that the abnormal sound due to the loosening of the bolt has a characteristic that the sound power at a frequency of about 1 kHz increases.
  Further, the collision sound generated when the rear wheel 11 of the step 9 in the case where the crack is generated falls by the step H1 and collides with the upper surface of the step rail 10 (hereinafter referred to as abnormal sound due to the crack). As a result of the experiment, the characteristics of were obtained as shown in the raw waveform diagram of FIG. 10A and the frequency analysis diagram of FIG. As shown in the frequency analysis diagram of FIG. 10B, it can be seen that the abnormal sound due to the crack has a characteristic that the sound power at a frequency of about 3 kHz increases.
  Therefore, the acoustic power at the normal characteristic frequency F1 shown in FIG. 8B for normal sound and the acoustic power at the characteristic frequency F2 at the bolt loosening shown in FIG. By comparing the acoustic power of the characteristic frequency F3 at the time of occurrence of the crack shown in FIG. 10B of the abnormal sound due to the crack, it is possible to determine one or both of the occurrence of the bolt loosening and the occurrence of the crack.
  Next, the procedure of the abnormality diagnosis work performed using the abnormality diagnosis apparatus 13 having the above configuration will be described with reference to FIG.
  That is, first, as shown in step S <b> 1 of FIG. 11, the operation of the passenger conveyor 1 is stopped by the maintenance engineer who performs the abnormality diagnosis work for the step 9.
  Next, as shown in step S <b> 2 of FIG. 11, the step forming body 14 is attached to the step rail 10.
  Next, as shown in step S3 of FIG. 11, after the acoustic detection means 15 is attached to the step rail 10, the determination means 16 comprising the amplifier 18, the AD converter 19 and the portable personal computer 20 is used as the entrance floor of the passenger conveyor 1. The sound detecting means 15 is connected to the amplifier 18 by the lead wire 15D while being installed on the surface, thereby completing the installation of the abnormality diagnosis device 13.
  Next, when the installation of the abnormality diagnosis device 13 is completed, a step is formed by operating the passenger conveyor 1 with a plurality of steps 9 connected endlessly as shown in step S4 of FIG. The rear wheel 11 of the step 9 is dropped from the step forming body 14 by running on the body 14.
  Next, as shown in step S5 of FIG. 11, it occurs when the rear wheel 11 of the step 9 drops from the step forming body 14 and collides with the step rail 10 by the sound detection unit 15 by operating the determination unit 16. Detect impact sound.
  Next, if a plurality of steps 9 connected endlessly are made to circulate once, the collision sound generated when the rear wheel 11 falls and collides with the step rail 10 is detected for all the steps 9. For example, as shown in step S6 of FIG. 11, the operation of the passenger conveyor 1 is stopped, and the collision sound transmitted from the sound detection means 15 to the determination means 16 and the normal sound stored in the determination means 16 in advance. Is compared to determine whether or not an abnormality has occurred in the step 9 as shown in step S7 of FIG.
  According to the procedure of the abnormality diagnosis work, the maintenance engineer can perform the abnormality diagnosis work of the step 9 without entering the frame 2 of the passenger conveyor 1 and without removing the step 9. The safety of the maintenance engineer is ensured, and the work time of the abnormality diagnosis work is greatly shortened.
  Next, the determination procedure by the determination means 16 of the abnormality diagnosis apparatus 13 will be described in detail with reference to FIGS.
  First, as shown in step S21 of FIG. 12, the collision acoustic signal for each step 9 transmitted from the sound detection unit 15 to the determination unit 16 is subjected to frequency analysis, and the acoustic power for each step 9 is calculated. Calculation is performed by the portable personal computer 20.
  Next, as shown in step S22 of FIG. 12, an acoustic power of 1000 ± 100 Hz is obtained for each of the acoustic power at the time of diagnosis calculated in step S21 of FIG. 12 and the normal acoustic power (normal acoustic power) stored in advance. The sum total of power and the difference α between these sums are calculated by the portable personal computer 20.
  Next, as shown in step S23 of FIG. 12, the sound of 3000 ± 200 Hz is obtained for each of the acoustic power at the time of diagnosis calculated in step S21 of FIG. 12 and the normal sound power (normal sound power) stored in advance. The total sum of power and the difference β between these sums are calculated by the portable personal computer 20.
  Next, as shown in step S24 of FIG. 12, the value X1 obtained by adding a constant (3 dB) to the difference α calculated in step S22 is 0 or less, and the constant β (2 dB) is calculated for the difference β calculated in step S22. Whether the added value X2 is 0 or less is determined by the portable personal computer 20. If both the value X1 and the value X2 are 0 or less, the process proceeds to step S25 in FIG. 12, and a display indicating that the step 9 is normal is displayed on the display screen of the portable personal computer 20. If both the value X1 and the value X2 are not 0 or less, the process proceeds to step S26.
  Next, when proceeding to step S26 in FIG. 13, whether the value X1 obtained by adding a constant (3 dB) to the difference α calculated in step S22 exceeds 0, and the constant (2 dB) is added to the difference β calculated in step S22. Whether the value X2 is 0 or less is determined by the portable personal computer 20. If the value X1 exceeds 0 and the value X2 is 0 or less, the process proceeds to step S27 in FIG. 13, and a display indicating that the bolt has loosened in the step 9 is displayed on the portable personal computer 20. On the display screen. If the value X1 does not exceed 0 and the value X2 is not 0 or less, the process proceeds to step S28 in FIG.
  Next, when the process proceeds to step S28 in FIG. 13, a value X1 obtained by adding a constant (3 dB) to the difference α calculated in step S22 is 0 or less, and a constant (2 dB) is added to the difference β calculated in step S22. Whether the value X2 exceeds 0 is determined by the portable personal computer 20. If the value X1 is less than or equal to 0 and the value X2 exceeds 0, the process proceeds to step S29 in FIG. 13, and an indication that a crack has occurred in the step 9 is displayed on the portable personal computer 20. On the display screen. Further, when the value X1 is not less than 0 and the value X2 does not exceed 0, the process proceeds to step S30 in FIG. 13 to indicate that both bolt looseness and cracks have occurred in the step 9. The display is made on the display screen of the portable personal computer 20.
  According to the determination procedure by the determination means 16, the determination is made by distinguishing three types of occurrences of bolt loosening, cracking, and both bolt loosening and cracking, and each is made on the display screen of the portable personal computer 20. Therefore, the maintenance engineer can confirm the abnormality diagnosis result of the step 9 accurately without difficulty.
  In the present embodiment, the collision sound generated when the step 9 falls on the step forming body 14 is detected, and the collision sound is compared with the normal sound stored in advance in the portable personal computer 20 to Since it is determined whether or not an abnormality has occurred in the stage 9, the abnormality diagnosis of the step 9 can be performed accurately without being affected by the environmental acoustics of the place where the passenger conveyor 1 is installed. it can.
  Further, in the present embodiment, since the step forming body 14 is attached to the intermediate position in the longitudinal direction of the passenger conveyor 1, the influence of the rotational sound of the driving machine 3 is small, and the acoustic detection means 15 detects the collision sound. Accuracy can be improved.
  Further, in the present embodiment, the step forming body 14 and the sound detecting means 15 are installed on the step rail 10, and the sound detecting means 15 is placed on the floor of the entrance / exit of the passenger conveyor 1 or the like. 18, if the passenger conveyor is operated and the step 9 is circulated only once, the determination result of whether or not the step 9 is abnormal in the portable personal computer 20 of the determination means 16 Is displayed, the diagnosis work is simple and the diagnosis work time can be shortened.
  The step forming body 14 of the present embodiment has a U-shaped member 14A and a fastener 17 that detachably attaches the U-shaped member 14A to the step rail 10, but is not limited to this configuration. . For example, a step is formed by attaching a liner to the joint of the step rail 10, or a shape in which a bolt for fixing the step rail 10 is formed on the upper surface (traveling surface) of the step rail 10 is formed. A step may be formed by replacing the bolt.
It is a schematic explanatory drawing of the whole passenger conveyor composition concerning one embodiment of the present invention. It is a schematic side view of the step of the passenger conveyor concerning one Embodiment of this invention. It is a figure explaining the state which installed the abnormality diagnosis apparatus of the step for passenger conveyors concerning one Embodiment of this invention in the passenger conveyor. It is a figure explaining the state which attached the level | step difference formation body in the step abnormality diagnostic apparatus for passenger conveyor steps concerning one Embodiment of this invention to the step rail. It is a schematic structure explanatory drawing of the acoustic detection means in the abnormality diagnosis apparatus of the step for passenger conveyor concerning one Embodiment of this invention. It is a figure which shows the attachment state in case the step makes a descent | fall operation | movement of the level | step difference formation body in the abnormality diagnosis apparatus of the step for passenger conveyors concerning one Embodiment of this invention. It is a figure which shows the attachment state in case the step makes a raise operation | movement of the level | step difference formation body in the abnormality diagnosis apparatus of the step for passenger conveyors concerning one Embodiment of this invention. The characteristic of the normal sound obtained by the abnormality diagnostic apparatus of the step for passenger conveyors concerning one Embodiment of this invention is shown, Comprising: (a) is a raw waveform figure at the time of normal, (b) is the frequency at the time of normal FIG. The characteristic of the collision sound in the state where the bolt of the step obtained by the step abnormality diagnosis device for the passenger conveyor according to one embodiment of the present invention is loosened is shown, (a) is a raw waveform diagram at normal time (B) is a frequency analysis chart in a normal state. The characteristic of the collision sound in the state where the crack generate | occur | produced in the step obtained by the abnormality diagnosis apparatus of the step for passenger conveyor concerning one Embodiment of this invention is shown, Comprising: (a) is a raw waveform figure at the time of normality (B) is a frequency analysis chart in a normal state. It is a figure which shows the diagnostic work procedure by the abnormality diagnosis method of the step for passenger conveyors concerning one Embodiment of this invention. It is a figure which shows the determination procedure by the determination means of the abnormality diagnosis apparatus of the step for passenger conveyor concerning one Embodiment of this invention. It is a figure which shows the procedure after it determines with abnormality by the determination means of the abnormality diagnosis apparatus of the step for passenger conveyor concerning one Embodiment of this invention.
Explanation of symbols
DESCRIPTION OF SYMBOLS 1 Passenger conveyor 2 Frame 3 Drive 4 Drive sprocket 5 Drive chain 6 Step chain drive sprocket 7 Step chain 8 Step chain driven sprocket 9 Step 9A Step frame 9B Step plate 9C Riser surface 9D Locking member 10 Step Step rail 11 Rear wheel 12 Bolt 13 Abnormality diagnosis device 14 Step forming body 14A U-shaped member 14A-1 Step forming portion 14A-2 Mounting piece 15 Sound detecting means 15A Magnet 15B Iron core 15C Coil 15D Locking member 15E Lead wire 16 Judging means 17 Fastener 17A Nut 17B Fixing bolt 18 Amplifier 19 AD converter 20 Portable personal computer

Claims (5)

  1.   A plurality of steps locked to an endless step chain detects the sound generated when traveling on the step rail, and compares the detected sound with the normal sound stored in advance. In the method for diagnosing a step for a passenger conveyor, wherein a step forming body is provided on the step rail, and the step forming body is provided with a step. The collision sound generated when the rear wheel passes and the rear wheel falls and collides with the step rail is detected, and the collision sound is compared with the normal sound stored in advance, so that there is an abnormality in the step. A method for diagnosing an abnormality in a step for a passenger conveyor, characterized by diagnosing whether or not it has occurred.
  2.   2. The method for diagnosing an abnormality in a step for a passenger conveyor according to claim 1, wherein the step forming body is provided on an upper portion of the step rail located in the middle of the longitudinal direction of the passenger conveyor.
  3.   The collision sound generated when the rear wheel of the step passes through the step forming body and falls and collides with the step rail is detected by an acoustic detection means including a magnetostrictive sensor. An abnormality diagnosis method for a step for a passenger conveyor according to claim 1 or 2.
  4.   A step forming body provided on the step rail, and a sound detecting means for detecting a collision sound generated when the rear wheel of the step passes through the step forming body and the rear wheel falls and collides with the step rail; A determination unit that determines whether or not an abnormality has occurred in the step by comparing the collision sound detected by the sound detection unit with a normal sound stored in advance, and displays the determination result An abnormality diagnosis device for a step for a passenger conveyor, characterized by comprising:
  5.   A U-shaped member comprising a step forming inclined portion that forms an inclined surface along the longitudinal direction of the step rail and an attachment piece for attaching the step forming inclined portion to the step rail; The abnormality diagnosis device for a step for a passenger conveyor according to claim 4, wherein the U-shaped member is formed from a fastener provided on the attachment piece for removably attaching the U-shaped member to the step rail.
JP2004346206A 2004-11-30 2004-11-30 Abnormality diagnosis method and abnormality diagnosis device for footstep for passenger conveyor Pending JP2006151621A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100030523A1 (en) * 2008-07-29 2010-02-04 Toshiba Elevator Kabushiki Kaisha Passenger conveyer abnormality diagnosis system
CN102050376A (en) * 2009-11-04 2011-05-11 株式会社东芝 Conveyor diagnostic device and conveyor diagnostic system
JP2012192995A (en) * 2011-03-15 2012-10-11 Toshiba Elevator Co Ltd Abnormality diagnosis system for passenger conveyer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100030523A1 (en) * 2008-07-29 2010-02-04 Toshiba Elevator Kabushiki Kaisha Passenger conveyer abnormality diagnosis system
CN102050376A (en) * 2009-11-04 2011-05-11 株式会社东芝 Conveyor diagnostic device and conveyor diagnostic system
JP2012192995A (en) * 2011-03-15 2012-10-11 Toshiba Elevator Co Ltd Abnormality diagnosis system for passenger conveyer

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