JP5052837B2 - Chain abnormality diagnosis device - Google Patents

Description

  The present invention relates to a chain abnormality diagnosis apparatus for diagnosing an abnormality in an escalator chain.

  As a conventional chain abnormality diagnosing device, for example, in Patent Document 1, in a chain elongation degree diagnosing device that is provided in a conveying device that drives a chain via a drive machine and diagnoses the degree of chain elongation, A passage detector for detecting the passage of the outer link portion, a passage measuring portion for measuring a pulse period of the inner link portion and the outer link portion of the chain by a pulse signal output from the passage detector, and an inner link portion of the chain, A determination unit that determines abnormal extension of the chain based on a change in the pulse period of the outer link portion and a determination value, a rotation detector that detects the rotation of the rotating shaft provided in the drive unit, and an output that is output from the rotation detector A rotation measurement unit that measures the number of rotations and rotation speed of the rotating shaft for a certain period of time based on the signal, , And a configuration in which a correcting unit for correcting the pulse period based on the speed coefficient.

Japanese Patent No. 3570914 (paragraph 0008)

  Since the conventional chain abnormality diagnosis device is configured as described above, in order to diagnose the chain abnormality, the inside of the escalator is opened, and the passage detector and rotation detector are fixed inside the transport device that drives the chain. It is necessary to install, but it takes time to fix and install these passage detectors and rotation detectors inside the transport device, so there is a problem that it is not possible to diagnose the abnormality of the existing escalator chain in a short time there were.

  The present invention has been made to solve the above problems, and is capable of diagnosing an abnormality of a chain of an existing escalator in a short time and with high accuracy without opening the interior of the escalator. The purpose is to obtain.

The chain abnormality diagnosis device according to the present invention is installed on one handrail of an escalator, detects an acceleration when the driving direction when starting operation is opposite to the driving direction immediately before the stop state, and outputs an acceleration signal An acceleration detection means for calculating, an activation delay time detection means for calculating an activation delay time until the handrail starts to operate based on an acceleration signal output from the acceleration detection means, and an activation calculated by the activation delay time detection means A determination unit for determining slack or elongation of the chain by comparing a delay time with a preset threshold value, wherein the activation delay time detection unit includes a vibration frequency component associated with the start of operation of the handrail. A low-pass filter having a cutoff frequency between F1 and F2 in F1 and the vibration frequency component F2 accompanying the operation of the upper sprocket. The absolute value of the acceleration signal is detected as the upper sprocket operation start time of the escalator when the absolute value of the acceleration signal exceeds a preset threshold value, and the absolute value of the low-pass signal obtained by applying the low-pass filter to the acceleration signal is a preset threshold value Is detected as the hand sliding action start time, and the difference between the upper sprocket operation start time and the hand sliding action start time is calculated as the activation delay time .

  According to the present invention, it is possible to diagnose an abnormality of a chain of an existing escalator with high accuracy in a short time without opening the inside of the escalator.

Embodiment 1 FIG.
FIG. 1 is a diagram showing the configuration of a chain abnormality diagnosis device and the configuration of an escalator according to Embodiment 1 of the present invention. In FIG. 1, the escalator includes a handrail 1, a drive unit 2, a drive chain 3, an upper sprocket 4, a first handrail chain 5, a handrail drive main shaft 6, a second handrail chain 7, and a handrail drive roller 8.

  In this escalator, when the drive unit 2 is driven and rotated, the drive chain 3 circulates and the upper sprocket 4 rotates, the first handrail chain 5 circulates and the handrail drive main shaft 6 rotates, and the second handrail The chain 7 circulates and the handrail driving roller 8 rotates so that the handrail 1 operates.

A chain abnormality diagnosis apparatus 100 for diagnosing escalator chain slack or elongation is installed on an escalator handrail 1, and includes an acceleration sensor (acceleration detection means) 101, an activation delay time detection means 102, a determination means 103, and a part identification means 104. It has.
Although not shown in FIG. 1, it is assumed that the chain abnormality diagnosis device 100 is installed on the left handrail 1A and the right handrail 1B on both sides of the escalator.

  In the chain abnormality diagnosis apparatus 100 shown in FIG. 1, the acceleration sensor 101 is installed so as to have an acceleration sensitivity that is vertically upward with respect to the traveling direction of the handrail 1 or the traveling direction, and the escalator is started to operate from a stopped state. The acceleration signal 201 is output by detecting the acceleration. At this time, the acceleration sensor 101 detects the acceleration when the driving direction when starting the escalator is opposite to the driving direction immediately before the stop state, outputs the acceleration signal 201a, and starts driving the escalator. It is assumed that the acceleration signal 201b is output by detecting the acceleration when the driving direction is the same as the driving direction immediately before the stop state.

  The activation delay time detection means 102 starts the operation of the handrail 1 based on the acceleration signal 201a when the driving direction when the escalator output from the acceleration sensor 101 is started is opposite to the driving direction immediately before the stop state. Until the start delay time 203a is calculated, and the calculated start delay time 203a is output to the determination means 103 and the part specifying means 104, and is also wired or wirelessly connected to the chain abnormality diagnosis device 100 installed on the handrail 1 on the opposite side. Send.

  The judging means 103 is slackened or stretched in the first handrail chain 5 or the second handrail chain 7 when the activation delay time 203a calculated by the activation delay time detection means 102 exceeds a preset threshold value. And the determination result 205 is output.

  The part specifying means 104 compares the activation delay time 203a calculated by the activation delay time detection means 102 with a preset threshold value, and determines the escalator transmitted from the chain abnormality diagnosis device 100 installed on the handrail 1 on the opposite side. The start delay time 204a in the case where the operation direction when the operation is started is opposite to the operation direction immediately before the stop state is compared with a preset threshold value, and the first handrail chain 5 or the second handrail chain 7 is loosened. Alternatively, a part where the elongation has occurred is specified and the part specifying result 206 is output.

  FIG. 2 is a diagram illustrating an example of an acceleration signal 201 output from the acceleration sensor 101 when the escalator is started to operate from a stopped state. When the escalator is started to operate at the operation start time 231, the drive chain 3 starts to circulate and the upper sprocket 4 starts to operate after a predetermined time. Since the upper sprocket 4 is connected to each step of the escalator via a step chain, vibration is generated in the entire escalator with the operation. As a result, at the upper sprocket operation start time 232, the amplitude of the acceleration signal 201 output from the acceleration sensor 101 of the chain abnormality diagnosis device 100 increases. Therefore, the activation delay time detection means 102 determines the time when the absolute value of the acceleration signal 201 exceeds a preset threshold value for the acceleration signal 201 when the operation is started from the stop state as the upper sprocket operation start time (first (Upper sprocket operation start time, second upper sprocket operation start time) 232.

  Next, when the upper sprocket 4 rotates, the first handrail chain 5 circulates and the handrail driving main shaft 6 rotates, and the second handrail chain 7 circulates and the handrail driving roller 8 rotates to move the handrail 1. Start operation. Since the handrail 1 is made of rubber, the vibration frequency component F1 associated with the start of operation of the handrail 1 is lower than the vibration frequency component F2 associated with the operation of the upper sprocket 4. Therefore, the activation delay time detection unit 102 applies only a vibration associated with the start of operation of the handrail 1 by applying a low-pass filter (not shown) having a cutoff frequency between the frequency F1 and the frequency F2 to the acceleration signal 201. Can be extracted.

  The signal after this low-pass filter is applied is a low-pass signal 207 as shown in FIG. The start delay time detecting means 102 determines the time when the absolute value of the low-pass signal 207 exceeds a preset threshold value for the low-pass signal 207 when the operation is started from the stop state. Time, second hand sliding operation start time) 233.

  The activation delay time detection means 102 determines the difference between the upper sprocket operation start time 232 and the hand slide operation start time 233 obtained as described above, and the activation delay time (first activation delay time, second (Start-up delay time) 203.

  As for the acceleration signal 201 output from the acceleration sensor 101 when the escalator is started from the stop state, the driving direction when starting the operation is opposite to the driving direction immediately before the stop state as described above. The acceleration signal 201a in a certain case and the acceleration signal 201b in the case where the driving direction when the driving is started are the same as the driving direction immediately before the stop state are distinguished from each other. The activation delay time 203a is calculated from 201a, and the activation delay time 203b is calculated from the acceleration signal 201b.

  As described above, the determination unit 103 is slackened or extended to the first handrail chain 5 or the second handrail chain 7 when the activation delay time 203a calculated by the activation delay time detection unit 102 exceeds a preset threshold value. Next, the reason why the activation delay time increases when, for example, slack or elongation occurs in the first handrail chain 5 of the escalator will be described with reference to FIGS. 3 and 4. .

  FIG. 3 is a diagram illustrating an example of an acceleration signal 201a output from the acceleration sensor 101 when the operation is started when the operation direction when the operation of the escalator is started is opposite to the operation direction immediately before the stop state. The upper waveform in FIG. 3 is a waveform obtained when the first handrail chain 5 is normal and no slack or elongation occurs. On the other hand, the lower waveform in FIG. 3 is a waveform obtained in a state in which the first handrail chain 5 is loosened or stretched.

  FIG. 4 is a diagram showing the behavior of the escalator in a state where the first handrail chain 5 of the escalator is loosened or stretched. When the escalator is lowered, the upper part of the first handrail chain 5 circulates while being loosened, and when the escalator is stopped, the upper part of the first handrail chain 5 is stopped in a state where the upper part is loosened or stretched. From this state, when the escalator is started to run in the direction opposite to the operation direction immediately before the stop state, that is, when the escalator is raised, the slack generated in the upper part of the first handrail chain 5 immediately after the upper sprocket 4 starts to rotate. Or it will wind up the stretch.

  While winding up the slack or elongation of the first handrail chain 5, the handrail drive main shaft 6 is stopped and the handrail 1 does not operate. When the slack or extension of the first handrail chain 5 is completely wound up, the handrail driving main shaft 6 rotates, the second handrail chain 7 circulates, the handrail driving roller 8 rotates, and the handrail 1 operates. become. At this time, an extra time for winding up the slack or elongation of the first handrail chain 5 occurs, so that when the slack or elongation of the first handrail chain 5 occurs, the activation delay time 203a increases from the normal time. . Also in FIG. 3, when slack or elongation occurs in the first handrail chain 5, it can be confirmed that the activation delay time 203 a is increased as compared with the normal time. The peak value P1 (241) and peak value P2 (242) shown in FIG. 3 will be described later.

  In the above description, when the first handrail chain 5 is slackened or stretched, an example is shown in which the lowering operation → stop → upward operation is performed, but the upward operation → stop → downward operation is performed. However, it goes without saying that the same result is obtained, and it goes without saying that even when the second handrail chain 7 is slackened or stretched, the activation delay time 203a tends to increase.

  FIG. 5 is a diagram for explaining the operation of the part specifying means 104. As shown in FIG. 5, the handrail 1 includes a left handrail 1A and a right handrail 1B, and a handrail drive main shaft 6 is wound with a second left handrail chain 7A and a right handrail chain 7B. The left handrail 1A and the right handrail 1B are driven via the.

  The chain abnormality diagnosis apparatus 100 is installed on the left handrail 1A and the right handrail 1B, and the activation delay time detection means 102 of each chain abnormality diagnosis apparatus 100 is the operation direction immediately before the stop state when the escalator starts operation. Based on the acceleration signals 201a and 202a output from the respective acceleration sensors 101 in the reverse direction, start delay times 203a and 204a until the handrail 1 starts operating are calculated. The activation delay time 203a obtained by the activation delay time detection means 102 of the chain abnormality diagnosis device 100 installed on the left handrail 1A is defined as TL, and the activation delay time detection means 102 of the chain abnormality diagnosis device 100 installed on the right handrail 1B. Let TR be the activation delay time 204a obtained in (1).

  Since the first handrail chain 5 transmits driving force to the left handrail 1A and the right handrail 1B, when the first handrail chain 5 is slackened or stretched, both the start delay times TL and TR increase. On the other hand, since the left second handrail chain 7A transmits the driving force only to the left handrail 1A, when the left second handrail chain 7A is slackened or stretched, the start delay time TL increases but the start delay time TR. Does not increase. Conversely, if slack or elongation occurs in the right second handrail chain 7B, the activation delay time TR increases, but the activation delay time TL does not increase.

  From the above characteristics, the part specifying unit 104 compares the activation delay time TL and the activation delay time TR with preset threshold values, and when both the activation delay time TL and the activation delay time TR exceed the preset threshold values, When the slack or elongation of the first handrail chain 5 is specified and only the start delay time TL exceeds the preset threshold value, the left handrail chain 7A is slackened or stretched. If only the activation delay time TR exceeds a preset threshold value, it is determined that slack or elongation has occurred in the right second handrail chain 7B, thereby causing slack or elongation. The part which is present can be specified.

  By the way, in the above, the activation delay time 203a obtained by the activation delay time detection unit 102 when the determination unit 103 starts the operation of the escalator is opposite to the operation direction immediately before the stop state, When a preset threshold value is exceeded, it is determined that slack or elongation has occurred in the first handrail chain 5 or the second handrail chain 7, and the determination result 205 is output. However, for each escalator, Since there are some differences such as the starting torque of the drive unit and the dimensional error of the drive system, the magnitude of the startup delay time 203a during normal operation may differ between different escalators.

  In order to avoid such a problem, the acceleration sensor 101 detects an acceleration when the driving direction when the escalator is started to run is opposite to the driving direction immediately before the stop state, and detects an acceleration signal (first (Acceleration signal) 201a is output, and the acceleration when the driving direction at the start of driving is the same as the driving direction immediately before the stop state is detected to output an acceleration signal (second acceleration signal) 201b, The activation delay time detecting means 102 calculates an activation delay time (first activation delay time) 203a based on the acceleration signal 201a, and calculates an activation delay time (second activation delay time) 203b based on the acceleration signal 201b. The determination means 103 obtains the start delay time detection means 102 when the operation direction when the operation is started is opposite to the operation direction immediately before the stop state. The start delay time 203a is the difference between the start delay time 203a obtained by the start delay time detection means 102 when the operation direction when starting the operation is the same as the operation direction immediately before the stop state. A delay time difference value is calculated, and when the calculated startup delay time difference value exceeds a preset threshold value, it is determined that slack or elongation has occurred in the first handrail chain 5 or the second handrail chain 7 The determination result 205 may be output.

  At this time, similarly to the determination unit 103, the part specifying unit 104 also calculates an activation delay time difference value that is the difference between the activation delay time 203a and the activation delay time 203b calculated by the activation delay time detection unit 102. The starting delay time difference value is compared with a preset threshold value, and the driving direction when the escalator is started and transmitted from the chain abnormality diagnosis device 100 installed on the opposite handrail 1 is immediately before the stop state. The activation delay time difference which is the difference between the activation delay time 204a when the operation direction is opposite to the operation direction and the activation delay time 204b when the operation direction when the operation is started is the same as the operation direction immediately before the stop state. Value is calculated, the calculated start delay time difference value is compared with a preset threshold value, and the first handrail chain 5 or the second handrail chain 7 is Similarly slack or elongation may output the part identification result 206 to identify the sites which are generated.

  For example, the starting delay time 203a calculated using the acceleration signal 201a when the escalator is stopped during the descending operation and then the ascending operation is started is set as T1, the escalator is stopped during the ascending operation, and then the ascending operation is performed. Let T2 be the startup delay time 203b calculated using the acceleration signal 201b when driving is started. At this time, the activation delay time difference value is (T1-T2). Since the start delay time difference value becomes dominant due to the slack or elongation of the first handrail chain 5 or the second handrail chain 7, the variation in the start delay time difference value between different escalators is reduced. Therefore, when the slack or the extension of the first handrail chain 5 or the second handrail chain 7 is determined using the same threshold value between different escalators, the start delay time difference value is used only for the start delay time 203a. Compared with the case of using, determination with higher accuracy becomes possible.

  In the above determination, the determination unit 103 determines whether the first handrail chain 5 or the second handrail chain 7 is slack or extended by using the start delay time difference value (T1-T2). The ratio (T1 / T2) is calculated, and the calculated start delay time ratio (T1 / T2) is compared with a preset threshold value to determine whether the first handrail chain 5 or the second handrail chain 7 is slack or stretched. Anyway. At this time, similarly to the determination unit 103, the part specifying unit 104 also uses the start delay time ratio (T1 / T2) to cause the slack or elongation of the first handrail chain 5 or the second handrail chain 7. A site may be specified.

  In the first embodiment, the part specifying means 104 determines the part where the slack or the extension of the first handrail chain 5 or the second handrail chain 7 is detected. Although the apparatus 100 is installed, one chain abnormality diagnosis apparatus 100 is first installed on the left handrail 1A, for example, and the part specifying unit 104 acquires the activation delay time 203 output by the activation delay time detection unit 102 Then, it can be installed on the right handrail 1B, and the part specifying means 104 can acquire the start delay time 203 output by the start delay time detecting means 102 and specify the part.

  FIG. 6 is a diagram showing the configuration of the escalator. In the first embodiment, the chain abnormality diagnosis device 100 is installed on the handrail 1, but the chain abnormality diagnosis device 100 is installed on the inner deck 11 or the skirt guard 12 near the handrail driving roller 8 shown in FIG. However, the same effect can be obtained.

  As described above, according to the first embodiment, the acceleration signal when the driving direction when the acceleration sensor 101 installed on the handrail 1 starts driving the escalator is opposite to the driving direction immediately before the stop state. 201a is output, the activation delay time detection means 102 calculates the activation delay time 203a until the handrail 1 starts to operate based on the acceleration signal 201a, and the determination means 103 compares the activation delay time 203a with a preset threshold value. By determining whether the first handrail chain 5 or the second handrail chain 7 is slack or stretched, it is possible to diagnose an abnormality of the existing escalator chain in a short time without opening the interior of the escalator. An effect is obtained.

  Further, according to the first embodiment, the part specifying unit 104 compares the activation delay time 203a calculated by the activation delay time detection unit 102 with a preset threshold value and is installed on the handrail 1 on the opposite side. By comparing the start delay time 204a, which is transmitted from the chain abnormality diagnosis device 100 when the escalator is started to operate with the direction opposite to that immediately before the stop state, with a preset threshold, With respect to the one handrail chain 5 or the second handrail chain 7, an effect that a portion where slack or elongation occurs can be specified is obtained.

  Furthermore, according to the first embodiment, the acceleration signal 101a installed in the handrail 1 has the acceleration signal 201a when the driving direction when the escalator is started is opposite to the driving direction immediately before the stop state. Until the driving direction when the driving is started is the same as the driving direction immediately before the stop state, the acceleration signal 201b is output, and the start delay time detecting means 102 starts the operation of the handrail 1 based on the acceleration signal 201a. The activation delay time 203a is calculated, the activation delay time 203b until the operation of the handrail 1 is started based on the acceleration signal 201b, and the determination means 103 is the difference between the activation delay time 203a and the activation delay time 203b. A delay time difference value is obtained, and the obtained start delay time difference value is compared with a preset threshold value to compare the first handrail chain 5 or the second handrail check. By determining the slack or elongation of emissions 7, without opening the inside of the escalator, the effect is obtained that it is possible to diagnose an existing escalator chain abnormalities with higher accuracy in a short time.

  Further, according to the first embodiment, the part specifying unit 104 obtains and obtains an activation delay time difference value that is a difference between the activation delay time 203a and the activation delay time 203b calculated by the activation delay time detection unit 102. The starting delay time difference value is compared with a preset threshold value, and the driving direction when the escalator is started and transmitted from the chain abnormality diagnosis device 100 installed on the handrail 1 on the opposite side is immediately before the stop state. An activation delay time difference value that is a difference between the activation delay time 204a when the operation direction is opposite to the operation direction and the activation delay time 204b when the operation direction when the operation is started is the same as the operation direction immediately before the stop state. For the first handrail chain 5 or the second handrail chain 7, by comparing the obtained start delay time difference value with a preset threshold value, An advantage of being able to identify the sites themselves or elongation has occurred.

Embodiment 2. FIG.
FIG. 7 is a diagram showing the configuration of the chain abnormality diagnosis device and the configuration of the escalator according to Embodiment 2 of the present invention. The configuration of the escalator shown in FIG. 7 is the same as the configuration of the escalator shown in FIG. 1 of the first embodiment, and the configuration of the chain abnormality diagnosis device 100 shown in FIG. 7 is the configuration of the chain abnormality diagnosis device 100 shown in FIG. The activation delay time detecting means 102 is deleted from the acceleration sensor 101 (acceleration detecting means) and the acceleration signal 201 is directly output to the determining means 103 and the part specifying means 104 and installed on the handrail 1 on the opposite side. It transmits to the chain abnormality diagnosis apparatus 100 by wire or wireless. Further, the acceleration signal 202 transmitted from the chain abnormality diagnosis device 100 installed on the opposite handrail 1 is input to the part specifying means 104.

  In the first embodiment, the determination unit 103 determines whether the first handrail chain 5 or the second handrail chain 7 is slack or stretched using the start delay time 203a or the start delay time difference value. In the second embodiment, the determination unit 103 uses a preset threshold value of the peak value of the acceleration signal 201a when the operation is started when the operation direction when the operation is started is opposite to the operation direction immediately before the stop state. Is exceeded, it is determined that slack or elongation has occurred in the first handrail chain 5 or the second handrail chain 7.

  In the chain abnormality diagnosis apparatus 100 shown in FIG. 7, the acceleration sensor 101 detects the acceleration when the escalator is started from the stop state and outputs the acceleration signal 201, similarly to the acceleration sensor 101 shown in FIG. At this time, the acceleration sensor 101 outputs an acceleration signal 201a when the driving direction when the escalator is started is opposite to the driving direction immediately before the stop state, and the driving direction when the escalator is started is The acceleration signal 201b is output when the driving direction is the same as the driving direction immediately before the stop state.

  The determination means 103 detects a peak value that is the maximum absolute value of the acceleration signal 201a from the acceleration sensor 101, and when the detected peak value exceeds a preset threshold value, the first handrail chain 5 or the second handrail chain 5 is detected. It is determined that slack or elongation has occurred in the handrail chain 7 and a determination result 205 is output.

  The part specifying means 104 detects a peak value that is the maximum absolute value of the acceleration signal 201a from the acceleration sensor 101, compares the detected peak value with a preset threshold value, and is installed on the handrail 1 on the opposite side. The peak value, which is the maximum absolute value of the acceleration signal 202a when the driving direction when the escalator is started to be transmitted is opposite to the driving direction immediately before the stop state, transmitted from the chain abnormality diagnosis device 100 is detected. Then, the detected peak value is compared with a preset threshold value, a part where slack or elongation occurs in the first handrail chain 5 or the second handrail chain 7 is specified, and a part specifying result 206 is output.

  If the peak value obtained with the left handrail 1A is PL and the peak value obtained with the right handrail 1B is PR, the first handrail chain 5 transmits the driving force to the left handrail 1A and the right handrail 1B on both sides. When slack or elongation occurs in the first handrail chain 5, both the peak value PL and the peak value PR increase. On the other hand, since the left second handrail chain 7A transmits the driving force only to the left handrail 1A, when the left second handrail chain 7A is slackened or stretched, the peak value PL increases, but the peak value PR is Does not increase. Conversely, when slack or elongation occurs in the right second handrail chain 7B, the peak value PR increases, but the peak value PL does not increase.

  From the above characteristics, the part specifying means 104 compares the peak value PL and the peak value PR with a preset threshold value, and if both the peak value PL and the peak value PR exceed the preset threshold value, When one handrail chain 5 is identified as slack or stretch, and only the peak value PL exceeds a preset threshold, it is identified that slack or stretch has occurred in the left second handrail chain 7A. When only the peak value PR exceeds a preset threshold value, the portion where the slack or the elongation occurs is identified by identifying that the right second handrail chain 7B is slack or stretching. can do.

  This will be specifically described with reference to FIGS. 3, 4 and 7. First, the acceleration sensor 101 detects the acceleration when the driving is started when the driving direction when the driving of the escalator is started is opposite to the driving direction immediately before the stop state, and outputs an acceleration signal 201a. Reference numeral 103 denotes a peak value that is the maximum absolute value of the acceleration signal 201 a from the acceleration sensor 101. For example, in FIG. 3, the peak value when the first handrail chain 5 is normal is P1 (241), and the peak value when the first handrail chain 5 is loosened or stretched is P2 (242).

  As shown in FIG. 4, when the operation is started in the direction opposite to the operation direction immediately before the stop state, in this example, when the ascending operation is started, the rotation speed of the upper sprocket 4 gradually increases from the zero state, The slack or elongation occurring in the upper part of one handrail chain 5 is taken up. While winding the slack or extension of the first handrail chain 5, the handrail drive main shaft 6 is stopped and the handrail 1 does not operate, but when the slack or extension of the first handrail chain 5 is completely wound. The handrail drive main shaft 6 starts to rotate. At this moment, since the rotation speed of the upper sprocket 4 has already increased, the handrail drive main shaft 6 starts to rotate while the rotation speed rapidly increases. Since this driving force rotates the handrail driving roller 8 via the second handrail chain 7 to operate the handrail 1, the acceleration at the start of the operation of the handrail 1, that is, the peak value P2 (242) becomes large. .

  On the other hand, if the first handrail chain 5 is not slackened or stretched, the rotational speed of the handrail drive main shaft 6 increases in the same manner as the rotational speed of the upper sprocket 4 gradually increases from zero. The acceleration at the start of the operation of the handrail 1, that is, the peak value P1 (241) is smaller than the peak value P2 (242). On the basis of the above, since a tendency that the peak value P1 <the peak value P2 is shown, a threshold value between the peak value P1 and the peak value P2 is set in advance, and the determination unit 103 sets the detected peak value to a preset threshold value. Is exceeded, it is determined that slack or elongation of the first handrail chain 5 or the second handrail chain 7 has occurred, and a determination result 205 is output.

  In the above description, an example in which the lowering operation → stop → upward operation is performed when the first handrail chain 5 is slackened or stretched is explained. Needless to say, even if slack or elongation occurs in the second handrail chain 7, it goes without saying that the peak value tends to increase, and the determination means 103 can determine in the same way.

  Further, for the same reason as when using the start delay time difference value in the first embodiment, the determination means 103 has the driving direction when the escalator is started to run in the opposite direction to the driving direction immediately before the stop state. The peak value P3 of the acceleration signal 201a from the acceleration sensor 101 when the driving is started and the driving direction when the driving is started are the same as the driving direction immediately before the stop state. The first handrail chain 5 or the second handrail chain 7 when the peak difference value (P3−P4) ≧ 0, which is the difference from the peak value P4 of the acceleration signal 201b from the acceleration sensor 101, exceeds a preset threshold value. Alternatively, it may be determined that slack or elongation has occurred, and the determination result 205 may be output. When the slack or elongation of the first handrail chain 5 or the second handrail chain 7 is determined using the same threshold value between different escalators, the peak difference value is used compared to the case where only the peak value P3 is used. Thus, determination with higher accuracy becomes possible.

  At this time, similarly to the determination unit 103, the part specifying unit 104 calculates a peak difference value that is a difference between the peak value of the acceleration signal 201a from the acceleration sensor 101 and the peak value of the acceleration signal 201b, and calculates the calculated peak difference. The driving direction when starting the operation of the escalator transmitted from the chain abnormality diagnosis device 100 installed on the opposite handrail 1 is opposite to the driving direction immediately before the stop state, while comparing the value with a preset threshold value. A peak difference value is calculated which is the difference between the peak value of the acceleration signal 202a in the case of the acceleration signal 202a and the peak value of the acceleration signal 202b in the case where the driving direction when the driving is started is the same as the driving direction immediately before the stop state. The calculated peak difference value is compared with a preset threshold value, and slack or elongation occurs in the first handrail chain 5 or the second handrail chain 7. And it outputs the region identification result 206 to have site specific manner.

  In the above determination, the determination unit 103 determines whether the first handrail chain 5 or the second handrail chain 7 is slack or stretched using the peak difference value (P3-P4). (P3 / P4) is calculated, and the calculated peak value ratio (P3 / P4) is compared with a preset threshold value to determine whether the first handrail chain 5 or the second handrail chain 7 is slack or stretched. May be. At this time, similarly to the determination unit 103, the part specifying unit 104 uses the peak value ratio (P3 / P4) to generate a part where the first handrail chain 5 or the second handrail chain 7 is loosened or stretched. May be specified.

  In the second embodiment, in order for the part specifying means 104 to specify the part where the first handrail chain 5 or the second handrail chain 7 is slackened or stretched, each of the handrails 1 on both sides is diagnosed with a chain abnormality. Although the apparatus 100 is installed, one chain abnormality diagnosis apparatus 100 is first installed on the left handrail 1A, for example, and the part specifying means 104 acquires the acceleration signal 201 output by the acceleration sensor 101, and then It is also possible to install the right handrail 1B, and the part specifying unit 104 can acquire the acceleration signal 201 output by the acceleration sensor 101 and specify the part.

  In the second embodiment, the chain abnormality diagnosis device 100 is installed on the handrail 1, but the chain abnormality diagnosis device 100 is disposed on the inner deck 11 or the skirt guard 12 near the handrail driving roller 8 shown in FIG. The same effect can be obtained even if installed.

  As described above, according to the second embodiment, the acceleration when the driving direction when the acceleration sensor 101 installed on the handrail 1 starts driving the escalator is opposite to the driving direction immediately before the stop state is obtained. Detecting and outputting the acceleration signal 201a, the determination means 103 detects the peak value which is the maximum absolute value of the acceleration signal 201a, and compares the detected peak value with a preset threshold value to compare the first handrail chain 5 or By determining whether the second handrail chain 7 is slack or stretched, it is possible to diagnose an abnormality of the existing escalator chain in a short time with high accuracy without opening the interior of the escalator.

  Further, according to the second embodiment, the part specifying means 104 detects the peak value that is the maximum absolute value of the acceleration signal 201a, compares the detected peak value with a preset threshold value, and at the opposite side. The maximum absolute value of the acceleration signal 202a transmitted from the chain abnormality diagnosis device 100 installed on the handrail 1 when the driving direction when the escalator is started is opposite to the driving direction immediately before the stop state. By detecting a peak value that is and comparing the detected peak value with a preset threshold value, it is possible to identify a portion where slack or elongation occurs in the first handrail chain 5 or the second handrail chain 7. The effect that it can be obtained.

  Further, according to the second embodiment, the acceleration sensor 101 installed on the handrail 1 detects the acceleration when the driving direction when the escalator is started to run is opposite to the driving direction immediately before the stop state. The acceleration signal 201a is output, the acceleration when the driving direction when the driving is started is the same as the driving direction immediately before the stop state is detected, and the acceleration signal 201b is output. By comparing the peak difference value, which is the difference between the peak value of the acceleration signal 201b and the peak value of the acceleration signal 201b, with a preset threshold value to determine whether the first handrail chain 5 or the second handrail chain 7 is slack or stretched, There is an effect that it is possible to diagnose the abnormality of the existing escalator chain in a short time with higher accuracy without opening the inside.

  Furthermore, according to the second embodiment, the part specifying unit 104 calculates a peak difference value that is a difference between the peak value of the acceleration signal 201a from the acceleration sensor 101 and the peak value of the acceleration signal 201b, and calculates the calculated peak. The difference value is compared with a preset threshold value, and the driving direction when the escalator is started and transmitted from the chain abnormality diagnosis device 100 installed on the opposite handrail 1 is opposite to the driving direction immediately before the stop state. The peak difference value, which is the difference between the peak value of the acceleration signal 202a in the case of the direction and the peak value of the acceleration signal 202b in the case where the driving direction when the driving is started is the same as the driving direction immediately before the stop state is calculated. Then, by comparing the calculated peak difference value with a preset threshold value, the first handrail chain 5 or the second handrail chain 7 There is an advantage that it is possible to identify the site where elongation occurs.

Embodiment 3 FIG.
FIG. 8 is a diagram showing a configuration of a chain abnormality diagnosis apparatus and an escalator according to Embodiment 3 of the present invention. The configuration of the escalator shown in FIG. 8 is the same as the configuration of the escalator shown in FIG. 1 of the first embodiment, and the configuration of the chain abnormality diagnosis device 100 shown in FIG. 8 is the configuration of the chain abnormality diagnosis device 100 shown in FIG. The acceleration sensor 101 is deleted, and a handrail speed detector 111 and handrail speed differentiating means 112 are added instead.

  In the chain abnormality diagnosis apparatus 100 shown in FIG. 1, the acceleration signal 201 is output using the acceleration sensor 101 installed on the handrail 1, but as shown in FIG. 8, the handrail speed detector installed on the handrail 1 is used. A handrail speed signal 211 may be detected by 111 and the handrail speed signal 211 may be output, and the handrail speed signal 211 may be differentiated by the handrail speed differentiation unit 112 to obtain the acceleration signal 201. The processing of the activation delay time detection unit 102, the determination unit 103, and the part specifying unit 104 is the same as that shown in FIG.

  As described above, according to the third embodiment, the acceleration signal 201 is obtained by using the handrail speed detector 111 and the handrail speed differentiating means 112 instead of the acceleration sensor 101 used in the first embodiment. Even if it comprises, the effect similar to the said Embodiment 1 is acquired.

Embodiment 4 FIG.
FIG. 9 is a diagram showing the configuration of a chain abnormality diagnosis device and the configuration of an escalator according to Embodiment 4 of the present invention. The configuration of the escalator shown in FIG. 9 is the same as the configuration of the escalator shown in FIG. 7 of the second embodiment, and the configuration of the chain abnormality diagnosis device 100 shown in FIG. 9 is the configuration of the chain abnormality diagnosis device 100 shown in FIG. The acceleration sensor 101 is deleted, and a handrail speed detector 111 and handrail speed differentiating means 112 are added instead.

  In the chain abnormality diagnosis device 100 shown in FIG. 7, the acceleration signal 201 is output using the acceleration sensor 101 installed on the handrail 1, but as shown in FIG. 9, the handrail speed detector installed on the handrail 1 is used. A handrail speed signal 211 may be detected by 111 and the handrail speed signal 211 may be output, and the handrail speed signal 211 may be differentiated by the handrail speed differentiation unit 112 to obtain the acceleration signal 201. The processes of the determination unit 103 and the part specifying unit 104 are the same as those shown in FIG.

  As described above, according to the fourth embodiment, the acceleration signal 201 is obtained using the handrail speed detector 111 and the handrail speed differentiating means 112 instead of the acceleration sensor 101 used in the second embodiment. Even if configured, the same effect as in the second embodiment can be obtained.

Embodiment 5 FIG.
FIG. 10 is a diagram showing the configuration of the chain abnormality diagnosis device and the configuration of the escalator according to Embodiment 5 of the present invention. The configuration of the escalator shown in FIG. 10 is the same as that of the escalator shown in FIG.

  A chain abnormality diagnosis device 100 for diagnosing escalator chain slack or elongation is installed on an escalator handrail 1 and includes an acceleration sensor (acceleration detection means) 121, a filter means 122, and a determination means 123. In the first embodiment, the slack or elongation of the first handrail chain 5 or the second handrail chain 7 is determined based on the acceleration signal 201 output from the acceleration sensor 101 when the escalator is started. In the fifth aspect, the partial elongation of the drive chain 3, the first handrail chain 5, or the second handrail chain 7 is determined based on the acceleration signal 221 in the steady operation of the escalator output from the acceleration sensor 121.

  In FIG. 10, the acceleration sensor 121 is installed so as to have a vertical upward acceleration sensitivity with respect to the traveling direction of the handrail 1 or the traveling direction, and detects an acceleration in a steady operation of the escalator and outputs an acceleration signal 221. .

  The filter unit 122 extracts a filter signal 222 that is a signal in a specific frequency band from the acceleration signal 221 output from the acceleration sensor 121.

  In the steady operation state of the escalator, the drive unit 2 rotates at a constant rotational speed. Therefore, if the chain link interval of the drive chain 3, the first handrail chain 5, or the second handrail chain 7 is constant, the handrail drive roller 8 rotates at a constant rotational speed, and as a result, the handrail of the handrail 1 The speed is constant.

  On the other hand, in the state where the chain link interval of the drive chain 3, the first handrail chain 5 or the second handrail chain 7 is not uniform, that is, the chain is partially stretched, the drive unit 2 rotates at a constant rotational speed. Even if it does, the rotational speed of the handrail drive roller 8 will fluctuate. As a result, the handrail speed of the handrail 1 fluctuates, so that a differential value of the handrail speed, that is, a handrail speed fluctuation component is superimposed on the acceleration signal 221 output from the acceleration sensor 121.

  The filter unit 122 extracts a superposed handrail speed fluctuation component as a filter signal 222 from the acceleration signal 221 output from the acceleration sensor 121. At this time, the frequency band taken out by the filter unit 122 may be, for example, around 1 Hz to 5 Hz.

  When the average amplitude of the filter signal 222 in a steady operation state of the escalator is set in advance and exceeds a threshold value, the determination unit 123 causes partial elongation in the drive chain 3, the first handrail chain 5, or the second handrail chain 7. The determination result 223 is output. As described above, when the partial extension of the drive chain 3, the first handrail chain 5, or the second handrail chain 7 occurs, the acceleration signal 221 includes a fluctuation component of the handrail speed as described above. This is because the average amplitude of the filter signal 222 is increased because they are superimposed.

  As described above, according to the fifth embodiment, the acceleration sensor 121 installed on the handrail 1 detects the acceleration when the escalator is in steady operation and outputs the acceleration signal 221, and the filter means 122 is the acceleration sensor 121. The fluctuation component of the handrail speed superimposed from the acceleration signal 221 output by the above is extracted as the filter signal 222, and the determination unit 123 compares the average amplitude of the filter signal 222 with a preset threshold value, By determining the partial extension of the first handrail chain 5 or the second handrail chain 7, there is an effect that it is possible to diagnose an abnormality of the existing escalator chain in a short time without opening the interior of the escalator. can get.

Embodiment 6 FIG.
FIG. 11 is a diagram showing a configuration of a chain abnormality diagnosis device according to Embodiment 6 of the present invention. In FIG. 11, the configuration of the escalator is omitted, but is the same as the configuration of the escalator of the first embodiment.

  Further, the configuration of the chain abnormality diagnosis device shown in FIG. 11 is obtained by deleting the acceleration sensor 121 shown in FIG. 10 of the fifth embodiment and adding a handrail speed detector 124 instead. In FIG. 11, the handrail speed detector 124 installed on the handrail 1 detects the handrail speed in the case of steady operation of the escalator and outputs a handrail speed signal 224. The handrail speed fluctuation component is superimposed on the handrail speed signal 224.

  The filter means 122 extracts the superimposed handrail speed fluctuation component as the filter signal 222 from the handrail speed signal 224 output from the handrail speed detector 124. The determination means 123 determines the occurrence of partial elongation of the drive chain 3, the first handrail chain 5, or the second handrail chain 7 by performing the same processing as in the fifth embodiment.

  As described above, according to the sixth embodiment, the handrail speed detector 124 installed on the handrail 1 detects the handrail speed when the escalator is in a steady operation, outputs the handrail speed signal 224, and the filter means 122. Is extracted from the handrail speed signal 224 output from the handrail speed detector 124 as a filter signal 222, and the determination means 123 compares the average amplitude of the filter signal 222 with a preset threshold value. By diagnosing the partial extension of the drive chain 3, the first handrail chain 5 or the second handrail chain 7, it is possible to diagnose an abnormality in the existing escalator chain in a short time without opening the interior of the escalator. The effect that it can do is acquired.

  Depending on the type of escalator, a third handrail chain and a fourth handrail chain may be further attached from the handrail drive main shaft 6 toward the lower landing. In the first to sixth embodiments, the third handrail chain and the fourth handrail chain are omitted for simplification. However, if this chain abnormality diagnosis device is used, the first handrail chain and the second handrail are omitted. Needless to say, an abnormality of the chain can be diagnosed as with the chain.

It is a figure which shows the structure of the chain abnormality diagnostic apparatus by Embodiment 1 of this invention, and the structure of an escalator. It is a figure which shows an example of the acceleration signal which an acceleration sensor outputs when a chain abnormality diagnosis apparatus by Embodiment 1 of this invention starts an escalator from a stop state. In the chain abnormality diagnosis device according to Embodiment 1 of the present invention, the acceleration signal output from the acceleration sensor when the operation is started when the operation direction when the escalator is started is opposite to the operation direction immediately before the stop state. It is a figure which shows an example. It is a figure which shows the behavior of the escalator in the state in which the slack or the expansion | swelling has generate | occur | produced in the 1st handrail chain of the escalator in the chain abnormality diagnostic apparatus by Embodiment 1 of this invention. It is a figure for demonstrating operation | movement of the site | part identification means of the chain abnormality diagnostic apparatus by Embodiment 1 of this invention. It is a figure which shows the structure of an escalator. It is a figure which shows the structure of the chain abnormality diagnostic apparatus by Embodiment 2 of this invention, and the structure of an escalator. It is a figure which shows the structure of the chain abnormality diagnostic apparatus by Embodiment 3 of this invention, and the structure of an escalator. It is a figure which shows the structure of the chain abnormality diagnostic apparatus by Embodiment 4 of this invention, and the structure of an escalator. It is a figure which shows the structure of the chain abnormality diagnostic apparatus by Embodiment 5 of this invention, and the structure of an escalator. It is a figure which shows the structure of the chain abnormality diagnostic apparatus by Embodiment 6 of this invention.

Explanation of symbols

1 handrail, 1A left handrail, 1B right handrail, 2 drive unit, 3 drive chain, 4 upper sprocket, 5 first handrail chain, 6 handrail drive main shaft, 7 second handrail chain, 7A left second handrail chain, 7B right second Handrail chain, 8 handrail drive roller, 11 inner deck, 12 skirt guard, 100 chain abnormality diagnosis device, 101 acceleration sensor, 102 start delay time detection means, 103 determination means, 104 site identification means, 111 handrail speed detector, 112 handrail Speed differentiation means, 121 acceleration sensor, 122 filter means, 123 judgment means, 124 handrail speed detector, 201 acceleration signal, 202 acceleration signal, 203 start delay time, 204 start delay time, 205 judgment result, 206 site identification result, 207 Low-pass signal, 211 Handrail speed signal 221 acceleration signal, 222 filter signal, 223 the determination result, 224 handrail speed signal, 231 operation start time, 232 upper sprocket operation start time, 233 handrail operation start time.

Claims (12)

An acceleration detecting means that is installed on one handrail of the escalator and detects the acceleration when the driving direction when starting operation is opposite to the driving direction immediately before the stop state, and outputs an acceleration signal;
An activation delay time detection means for calculating an activation delay time until the handrail starts to operate based on the acceleration signal output from the acceleration detection means;
In chain troubleshooting apparatus and a determining means for determining slack or elongation of the chain by comparing the preset threshold value and has been activated delay calculated by the start-up delay time detecting means,
The activation delay time detecting means includes a low-pass filter having a cutoff frequency between F1 and F2 in the vibration frequency component F1 accompanying the start of the handrail operation and the vibration frequency component F2 accompanying the operation of the upper sprocket. When the absolute value of the signal exceeds a preset threshold, it is detected as the upper sprocket operation start time of the escalator, and when the absolute value of the low-pass signal obtained by applying the low-pass filter to the acceleration signal exceeds a preset threshold detected as handrail operation start time, Ji En troubleshooting apparatus and calculates the difference between the upper sprocket operation start time and the handrail operation start time as the start-up delay.   Comparing the start delay time calculated by the start delay time detecting means with a preset threshold value, the driving direction when starting operation obtained from the chain abnormality diagnosis device having the acceleration detecting means installed on the opposite handrail is Comparing the start delay time in the case of the direction opposite to the driving direction immediately before the stop state with a preset threshold, it is provided with a part specifying means for specifying a part where the chain is slackened or stretched The chain abnormality diagnosis device according to claim 1. Installed on one handrail of the escalator and detected the acceleration when the driving direction when starting operation is opposite to the driving direction immediately before the stop state, and output the first acceleration signal and started driving. Acceleration detecting means for detecting the acceleration when the driving direction is the same as the driving direction immediately before the stop state and outputting a second acceleration signal;
Based on the first acceleration signal output from the acceleration detection means, a first activation delay time until the handrail starts to operate is calculated, and on the basis of the second acceleration signal output from the acceleration detection means. An activation delay time detecting means for calculating a second activation delay time until the handrail starts to operate;
The start delay time difference value or the start delay time ratio is calculated from the first start delay time and the second start delay time calculated by the start delay time detecting means, and compared with a preset threshold value. A chain abnormality diagnosis device comprising a determination means for determining elongation. The activation delay time detecting means detects the first upper sprocket operation start time of the escalator when the absolute value of the first acceleration signal exceeds a preset threshold, and applies a low-pass filter to the first acceleration signal. When the absolute value of the low-pass signal exceeds a preset threshold, it is detected as the first hand sliding action start time, and the difference between the first upper sprocket operation start time and the first hand sliding action start time is Is calculated as a start delay time of 1 and when the absolute value of the second acceleration signal exceeds a preset threshold, it is detected as the second upper sprocket operation start time of the escalator, and the second acceleration signal is low-passed. When the absolute value of the low-pass signal to which the filter is applied exceeds a preset threshold, it is detected as the second hand sliding operation start time, and the second upper part Chain abnormality diagnosis apparatus according to claim 3, wherein the calculating the difference between the sprocket operation start time and the second handrail operation start time as the second startup delay. An activation delay time difference value or an activation delay time ratio is obtained from the first activation delay time and the second activation delay time calculated by the activation delay time detecting means, and compared with a preset threshold value, and installed on the opposite handrail. The first activation delay time and the operation when the operation is started when the operation direction when starting the operation obtained from the chain abnormality diagnosis device having the acceleration detecting means is opposite to the operation direction immediately before the stop state When the direction is the same as the driving direction immediately before the stop state, the start delay time difference value or the start delay time ratio is obtained from the second start delay time and compared with a preset threshold value. 4. The chain abnormality diagnosis device according to claim 3, further comprising a part specifying means for specifying the part that has occurred. An acceleration detecting means that is installed on one handrail of the escalator and detects the acceleration when the driving direction when starting operation is opposite to the driving direction immediately before the stop state, and outputs an acceleration signal;
A chain abnormality diagnosis apparatus comprising: a determination unit that compares the peak value of the acceleration signal output by the acceleration detection unit with a preset threshold value to determine whether the chain is slack or stretched. Comparing the peak value of the acceleration signal output by the acceleration detecting means with a preset threshold value, the driving direction when starting operation obtained from the chain abnormality diagnosis device having the acceleration detecting means installed on the opposite handrail is Comparing the peak value of the acceleration signal when it is in the direction opposite to the driving direction immediately before the stop state with a preset threshold value, it is provided with a part specifying means for specifying a part where the chain is slack or stretched 7. The chain abnormality diagnosis device according to claim 6, wherein Installed on one handrail of the escalator and detected the acceleration when the driving direction when starting operation is opposite to the driving direction immediately before the stop state, and output the first acceleration signal and started driving. Acceleration detecting means for detecting the acceleration when the driving direction is the same as the driving direction immediately before the stop state and outputting a second acceleration signal;
The peak difference value or peak value ratio is obtained from the peak value of the first acceleration signal and the peak value of the second acceleration signal output by the acceleration detecting means, and compared with a preset threshold value. A chain abnormality diagnosis apparatus comprising: a determination unit that determines The peak difference value or the peak value ratio is obtained from the peak value of the first acceleration signal and the peak value of the second acceleration signal output by the acceleration detection means, and compared with a preset threshold value, and installed on the opposite handrail. The peak value of the first acceleration signal when the driving direction when starting the operation obtained from the chain abnormality diagnosis device having the acceleration detecting means is opposite to the driving direction immediately before the stop state and when the driving is started When the driving direction is the same as the driving direction immediately before the stop state, the peak difference value or peak value ratio is obtained from the peak value of the second acceleration signal and compared with a preset threshold value. 9. The chain abnormality diagnosis device according to claim 8, further comprising a part specifying means for specifying the part that has occurred. The chain abnormality diagnosis apparatus according to any one of claims 1, 3 , 6 , and 8, wherein an acceleration sensor is used as the acceleration detection means. The acceleration detection means
A handrail speed detector that detects the handrail speed and outputs a handrail speed signal;
Claim 1, characterized in that a handrail speed differential means for outputting an acceleration signal by differentiating the handrail speed signal output by該手sliding speed detector, according to claim 3, claim 6, claim 8 The chain abnormality diagnosis device according to any one of the preceding claims. The acceleration detection means is installed on the inner deck or skirt guard of the escalator instead of being installed on the handrail of the escalator, any one of claims 1, 3 , 6 , and 8. The chain abnormality diagnosis device described in the item.

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