JP2010149970A - Diagnostic device of passenger conveyer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a diagnostic device of a passenger conveyer excellent in reliability. <P>SOLUTION: The diagnostic device of the passenger conveyer includes: a load fluctuation measuring means 12 reading the output information of a drive torque control device 4 to measure a load fluctuation; a fixed stagnation diagnostic means 13 diagnosing the fixed stagnation of a sliding fixed part in the longitudinal direction of a following part terminal gear 7 from a displacement measured result of a displacement sensor 11, an amplitude value of a load fluctuation measured result, and a synchronous level of a displacement point; a chain elongation diagnostic means 14 diagnosing the elongation of a chain by measuring the position of the following part terminal gear 7 with the displacement sensor 11, and comparing the result all the time with a result measured when a step chain 8 is new immediately after starting operation; and a chain unsymmetrical elongation diagnostic means 15 making a comparison between light and left elongation measured values obtained by the chain elongation diagnostic means 14 and diagnosing whether the difference is within a predetermined range or not. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a passenger conveyor diagnostic apparatus suitable for improving maintenance workability.

As a conventional passenger conveyor diagnostic device, for example, an operating piece is provided on a step installed endlessly on a step chain, and a detector is provided at any one position on a trajectory through which the operating piece passes. There has been proposed a method of diagnosing the elongation of a step chain by comparing a passing time interval with a predetermined time interval (see, for example, Patent Document 1).
JP 2002-87750 A

  By the way, the conventional passenger conveyor diagnostic device described above has different diagnostic results due to differences in passenger boarding conditions and step running resistance for each part because the step passing time interval varies depending on the tension acting on the step chain. End up. In other words, since diagnosis is not always performed under the same conditions, there is a possibility that the diagnosis is erroneous.

  The present invention has been made in view of the actual situation in the prior art, and an object thereof is to provide a passenger conveyor diagnostic device excellent in reliability.

  In order to achieve the above object, in claim 1 of the present invention, a drive unit terminal gear that rotates in synchronization with a drive motor, a driven unit terminal gear that synchronizes with the rotation of the drive unit terminal gear through chain transmission, and an endless chain In a passenger conveyor diagnostic device comprising steps connected in a shape and a torque control device that variably controls the torque command value of the drive motor, a load generated by passengers getting on and off using the output signal of the torque control device A load fluctuation measuring means for measuring fluctuation, a displacement sensor for measuring a distance from the reference point and an amplitude value by which the follower terminal gear slides back and forth due to a chain fluctuation connecting the load fluctuation and the step, and a load fluctuation measurement result Is compared with the synchronization level of the amplitude measurement result to diagnose the solid state of the longitudinal sliding mechanism of the follower terminal gear Determine the no-load state from the output signal of the torque control device and the astringency diagnosis means, measure the distance to the driven terminal gear in this state, and diagnose the extension of the step chain from the amount of change immediately after operation It is characterized by comprising chain elongation diagnostic means and chain fragment elongation diagnostic means for diagnosing the state of one-stretching of the step chain by calculating the difference between the elongation amounts of the step chains provided on the left and right.

  With this configuration, the output signal of the system that controls the passenger conveyor itself is utilized, and this is compared with the result of measuring the longitudinal sliding displacement value of the driven unit terminal gear, and the rationality is judged to determine the stability of the sliding unit. Phenomena such as astringency, chain elongation, and left and right chain length imbalance can be mechanically diagnosed, and diagnostic results excellent in reliability and maintainability can be obtained.

  According to a second aspect of the present invention, the diagnosis according to the first aspect is characterized in that the diagnosis is performed after a certain period of time has elapsed from the start of operation and the load resistance is stabilized.

  Thereby, a stable diagnosis can be performed.

  According to a third aspect of the present invention, in the first or second aspect, the diagnosis is performed only once every day, and the diagnosis result is stored.

  Thereby, the evaluation interval of data can be made constant and an accurate diagnosis can be performed.

  According to a fourth aspect of the present invention, the diagnosis according to the first aspect is characterized in that measurement and diagnosis are repeated so as to obtain a plurality of diagnosis results when the diagnosis result is determined to be abnormal.

  Thereby, it is possible to perform a diagnosis that eliminates the influence of a misdiagnosis caused by an external factor.

  According to the present invention, the output signal of the system for controlling the passenger conveyor itself is utilized, the result of measuring the longitudinal sliding displacement value of the driven terminal gear is matched, and the rationality is determined by judging the rationality. Thus, it is possible to provide a diagnostic apparatus for a passenger conveyor that is mechanically diagnosable, such as stubbornness, chain elongation, and left and right chain length imbalance, and that is excellent in reliability and maintainability.

  Embodiments of a passenger conveyor diagnostic device according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a front view showing the configuration of a driving device for a passenger conveyor that is the subject of the present invention, FIG. 2 is a front view of the main part of a driven terminal gear portion, and a function showing a passenger conveyor diagnostic device according to an embodiment of the present invention. FIG. 4 is a flowchart for explaining the diagnostic procedure of the present invention, FIG. 5 is a diagram showing the relationship between the displacement of the step chain and the operating time, and FIG. 6 is a diagram showing the relationship between the displacement of the step chain and the passenger load factor. (A) shows a normal case and (b) shows an abnormal case.

  Here, an escalator will be described as an example of a passenger conveyor.

  In FIG. 1, the power of the drive motor 1 is transmitted to the speed reducer 3 by the belt 2, and the drive motor 1 is controlled by a drive torque control device 4 for rotational acceleration, speed, torque, and the like. The reduction gear 3 is connected to the drive unit terminal gear 6 by a driving chain 5. The drive unit terminal gear 6 is wound around the driven unit terminal gear 7 and the step chain 8, and the step 9 is connected to the step chain 8 in an endless manner. As a result, the step 9 moves in synchronization with the rotation of the drive motor 1.

  As shown in FIG. 2, the follower terminal gear 7 is pulled by a spring 10 and slides in the front-rear direction so as to automatically absorb the extension so as not to bend even if the step chain 8 is extended due to wear. It is the composition to do.

  As shown in FIG. 3, a displacement sensor 11 that measures the amount of displacement of the follower terminal gear 7 in the front-rear direction, and torque to maintain a constant speed even when the load changes due to passengers getting on and off the drive torque control device 4. The load fluctuation measuring means 12 that reads the output information to perform control and measures the load fluctuation, and the displacement measurement result, the amplitude value of the load fluctuation measurement result, and the synchronization level of the displacement point, the longitudinal sliding of the driven terminal gear 7 The no-load condition is determined from the output information of the driving torque control device 4 and the firmness diagnosis means 13 for diagnosing whether the fixed part is not tight, and the displacement sensor 11 determines the position of the driven part terminal gear 7 in this state. The chain elongation diagnostic means 14 for measuring and diagnosing the chain elongation always compared with the measurement result when the step chain 8 immediately after the start of operation is new, and the chain elongation diagnostic means 14 A chain piece elongation diagnostic means 15 for comparing the obtained left and right elongation measurement values and diagnosing whether the difference is within a specified range, and a remote monitoring device 16 for regularly informing the technician of the result of the diagnosis It is configured.

  The diagnosis procedure will be described with reference to the flowchart of FIG.

  First, an escalator is started by an equipment manager or a technician, and it is determined whether or not a normal operating state in which a trouble signal or the like is not issued (S1). If it determines with operating normally, it will be determined whether the fixed time has passed since the start of starting, or whether automatic start / stop was repeated more than fixed number of times (S2). This is a measure for always diagnosing under the same conditions because the load state is not stable immediately after start-up due to temperature drop or bending of the standby device, etc., and the approximate time is approximately 10 minutes or more. As a guideline, it is appropriate to operate 3 times or more within 5 minutes of standby time. If it determines with driving | running | working more than fixed time or frequency | count, load information will be determined from the output information of the drive torque control apparatus 4 (S3). If it is determined that there is no load, the left and right stretches of the step chain 8 are measured from the signal information of the displacement sensor 11 (S4), and it is determined whether the stretch is within a specified change value (S5). As shown in FIG. 5, the determination at this time is stored as an initial displacement value immediately after the escalator is completed and started to operate, and is determined from the rate of change of elongation compared to this initial value and the displacement allowable absolute Perform either or both of the judgments from the value. If it is determined in S5 that it is within the specified value, it is next determined whether the difference between the left and right lengths of the step chain 8 is within the specified value (S6). This is because even if the step chain 8 is within the usable range for wear, if the difference in length between the left and right sides is large, the step 9 will run obliquely and the diagonal portion is long, so the side of the step This is performed in order to prevent interference with a design product installed on the side or a guide device into which the step 9 enters. If it is determined that it is within the specified value, it is determined that the length of the step chain 8 is normal (S7), the result is stored in the storage area of the diagnostic device, and the diagnosis is terminated (S8).

  The measurement accompanying this diagnosis is once a day. This is because the data evaluation interval can be made constant and accurate diagnosis can be performed.

  If it is determined in S3 that the vehicle is not in a no-load state (S9), the load variation state of the passenger is measured, and the displacement variation on the left and right of the step chain 8 is measured from the signal information of the displacement sensor 11 (S10). Next, it is determined whether the passenger fluctuation and the displacement fluctuation are synchronized (S11). As shown in FIG. 6 (a), when the passenger variation is repeated, the tension of the step chain 8 also varies, so that the displacement of the step chain 8 also varies correctly. However, if the longitudinal sliding function of the follower terminal gear 7 is awkward for any reason, as shown in FIG. 6 (b), the displacement fluctuation will not occur even if there is a passenger fluctuation. If this state is repeated, the function that automatically absorbs the deflection of the step chain 8 does not work normally, so if abnormal wear occurs in the biting part of the step chain 8, it will be abnormal if the astringency occurs only on either the left or right Judgment is made to prevent repeated repeated bending loads from occurring on the bearings and causing premature deterioration of the equipment. If it determines with synchronizing, it determines with the back-and-forth sliding mechanism of the follower part terminal gear 7 being normal (S12), stores this result, and complete | finishes a diagnosis (S8).

  If it is determined in S11 that the fluctuations are not synchronized, it is determined that the sliding mechanism rigidity of the driven unit terminal gear 7 is abnormal (S13), and it is determined whether an abnormality result is obtained three times in succession (S14). This eliminates the influence of misdiagnosis due to an external factor, and it can be considered that it is not an external factor as long as it is the same determination result for three consecutive times. When it is determined that there is an abnormality three times in succession, this result is stored and the diagnosis is terminated (S8).

  If it is determined in S5 that the elongation of the step chain 8 deviates from the specified value, it is determined that the overall elongation is abnormal (S15), and it is determined whether an abnormal result is obtained three times in succession (S16). In the case of three consecutive abnormalities, the overall elongation abnormality determination result of S15 is stored and the diagnosis is terminated (S8).

  If it is determined in S6 that the difference between the left and right lengths of the step chain 8 deviates from the specified value, it is determined that the stretch is abnormal (S17), and it is determined whether an abnormal result is obtained three times in succession (S16). In the case of three consecutive abnormalities, the single stretch abnormality determination result of S17 is stored and the diagnosis is terminated (S8).

  The stored diagnosis results are periodically notified to the technician by the remote monitoring device 16, and the technician performs appropriate maintenance work based on the trend of change over time. Depending on the abnormal state, it is also possible to notify the technician as an emergency instruction separately from the periodic notification.

  In the embodiment of the present invention configured as described above, the longitudinal sliding mechanism state of the driven portion terminal gear 7 and the extension state of the step chain 8 can be diagnosed with high accuracy, so that in the unlikely event that the device is in an abnormal state Appropriate maintenance work can be performed promptly, and reliability and maintainability can be improved.

It is a front view which shows the drive equipment structure of the passenger conveyor used as the object of this invention. It is a principal part front view of a driven part terminal gear part. It is a functional block diagram which shows the diagnostic apparatus of the passenger conveyor which becomes one Example of this invention. It is a flowchart explaining the diagnostic procedure of this invention. It is a figure which shows the relationship between the displacement of a step chain, and operation time. It is a figure which shows the relationship between the displacement of a step chain, and a passenger load factor, (a) is normal, (b) has shown the abnormal case.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drive motor 2 Belt 3 Reducer 4 Drive torque control device 5 Driving chain 6 Drive part terminal gear 7 Drive part terminal gear 8 Step chain 9 Step 10 Spring 11 Displacement sensor 12 Load fluctuation measurement means 13 Stiffness diagnosis means 14 Chain elongation diagnosis Means 15 Chain piece stretch diagnostic means 16 Remote monitoring device

Claims (4)

A drive terminal gear that rotates in synchronization with the drive motor, a follower terminal gear that synchronizes with the rotation of the drive terminal gear through chain transmission, a step connected endlessly to the chain, and a torque command value of the drive motor In a passenger conveyor diagnostic device comprising a torque control device for variable control,
Load fluctuation measuring means for measuring load fluctuation caused by passengers getting on and off using the output signal of the torque control device, and amplitude at which the follower terminal gear slides back and forth due to load fluctuation and elongation of a chain connecting steps A displacement sensor that measures the value and the distance from the reference point, and compares the synchronization level of the load fluctuation measurement result and the amplitude measurement result to diagnose the firmness state of the longitudinal sliding mechanism of the follower terminal gear Chain extension that determines the no-load state from the output signal of the diagnostic means and the torque control device, measures the distance to the driven unit terminal gear in this state, and diagnoses the extension of the step chain from the amount of change immediately after operation A chain stretch diagnosis hand that calculates the difference in stretch between the diagnostic means and the step chain provided on the left and right to diagnose the stretched state of the step chain Diagnostic device of a passenger conveyor, characterized in that it comprises and.   2. The passenger conveyor diagnosis apparatus according to claim 1, wherein the diagnosis is performed after a certain period of time has elapsed from the start of operation and the load resistance is stabilized.   3. The passenger conveyor diagnosis device according to claim 1, wherein the diagnosis is performed only once a day and the diagnosis result is stored.   2. The passenger conveyor diagnostic apparatus according to claim 1, wherein, when the diagnosis result is determined to be abnormal, measurement and diagnosis are repeated so as to obtain a plurality of diagnosis results.

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