JP6606042B2 - Passenger conveyor, passenger conveyor abnormality detection device, and passenger conveyor abnormality detection method - Google Patents

Description

  The present invention relates to a passenger conveyor, a passenger conveyor abnormality detection device, and a passenger conveyor abnormality detection method.

  In general, an escalator, which is an example of a passenger conveyor, includes a frame body that is installed over an upper floor and a lower floor, a guide rail that is attached to the frame body, and a plurality of steps that are circulated and guided by the guide rail. It has. An endless step chain is connected to the plurality of steps, and the plurality of steps circulate and move when the step chain is rotationally driven by the drive mechanism.

  Patent Document 1 discloses a passenger conveyor provided with a pressure-sensitive element that is provided on the front-side back surface (the ceiling of the valley between the comb teeth) and stops the passenger conveyor in response to being pressed. A safety device is disclosed.

JP 2007-112595 A

  By the way, on the upper surface of the step, a step plate having a plurality of grooves formed in parallel with the traveling direction of the step is provided. The tread is a thin plate that has been processed with unevenness, and may cause abnormalities such as rising from the upper surface of the step or deformation of the groove mountain due to aging deterioration or damage by the shoe sole of the passenger. Conventionally, various sensors and techniques for performing image diagnosis have been studied in order to detect treadboard abnormalities. However, the detection algorithm is complicated due to the special shape of the treads and the presence of passengers during driving. In addition, it is difficult to secure a space for installing a camera or the like around the passenger conveyor, and it has been extremely expensive to detect an abnormality.

  Here, the technique disclosed in Patent Document 1 is a method in which a comb-like valley is formed when a thin string-like object that does not cause damage, deformation, or lifting of a comb is sandwiched between gaps between the comb and the step. It is possible to stop the passenger conveyor according to the pressure applied to the vehicle. However, even if the passenger conveyor is stopped after the tread is deformed and pressure is applied to the valley of the comb teeth due to the contact between the comb and the tread, there is a possibility that the comb and the tread are already damaged. High, it takes a long time to restore the passenger conveyor.

  The present invention has been made in view of such a situation, and an object of the present invention is to detect an abnormality in the tread before the comb teeth come into contact with the tread.

A passenger conveyor reflecting one aspect of the present invention is one in which a plurality of steps connected in an endless manner are circulated and moved by a drive unit, and includes a comb plate, a displacement detection unit, and a control unit.
The comb plate is provided at the tip with comb teeth that mesh with the step plate provided on the step, and is attached to the landing floor. The displacement detector is attached to the comb plate on the side facing the tread, and detects the displacement in the height direction of the tread that moves horizontally without contacting the tread . The control unit determines that the amount of displacement from the reference displacement obtained based on the displacement of the tread exceeds one of a plurality of threshold values provided for detecting an abnormality of the tread before the tread contacts the comb teeth. If there is an error in the tread, the action is taken to cope with the tread. In this case, the tread is abnormal depending on the type of threshold that exceeds the reference displacement. changing the contents of the operation to deal with.
In addition, said passenger conveyor is one aspect | mode of this invention, About the passenger conveyor abnormality detection apparatus which reflected one side of this invention, and the passenger conveyor abnormality detection method, the passenger conveyor which reflected one side of this invention and It has the same configuration.

According to the present invention, it is possible to prevent contact between the tread board and the comb teeth by detecting that an abnormality has occurred in the tread board before the tread board contacts the comb teeth.
Problems, configurations, and effects other than those described above will be clarified by the following description of the embodiment.

It is a schematic structure figure showing typically a passenger conveyor concerning an example of an embodiment of the present invention. It is explanatory drawing which shows the example of installation of the displacement detection part attached to the back surface of the comb board concerning one embodiment of this invention. It is a block diagram which shows the structural example of the control part which concerns on the 1st example of an embodiment of this invention. It is a block diagram which shows the hardware structural example of the computer which concerns on the 1st example of an embodiment of this invention. It is an enlarged view of the upper boarding / alighting floor which shows the relationship between the comb teeth and a normal tread according to the first embodiment of the present invention. It is an enlarged view of the upper boarding / alighting floor which shows the relationship between the comb-tooth which concerns on the example of 1st Embodiment of this invention, and the tread which an abnormality produced. It is a flowchart which shows the process example of the control part which performs abnormality detection of the tread concerning the 1st example of an embodiment of the present invention. It is a flowchart which shows the process example of the control part which performs the abnormality detection of the tread concerning the 2nd Example of this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings. In the present specification and drawings, components having substantially the same function or configuration are denoted by the same reference numerals, and redundant description is omitted.

[First Embodiment]
FIG. 1 is a schematic configuration diagram schematically showing a passenger conveyor 1.

  The passenger conveyor 1 is an inclined passenger conveyor, so-called escalator, installed between the upper floor 100 and the lower floor 101 of the building structure. The passenger conveyor 1 includes a frame 2, an upper landing floor 3 a, a lower landing floor 3 b, a balustrade section 4, a handrail 5, a plurality of steps 6, a control section 7, and a driving section 8. Yes.

  The frame 2 is installed across the upper floor 100 and the lower floor 101. The frame 2 includes an upper horizontal section 9A, a lower horizontal section 9B, and an inclined section 9C. Hereinafter, the direction extending from the lower floor 101 to the upper floor 100 in the frame 2 is defined as the longitudinal direction of the frame 2. Further, the left-right direction when the frame 2 is viewed from the lower floor 101 is defined as the width direction of the frame 2. Moreover, the arrow which makes the horizontal direction of the passenger conveyor 1 X direction and makes a height direction Z direction is shown in the figure.

  At the entrance of the upper floor 100 in the longitudinal direction in the frame body 2, an upper entrance / exit 3 a (an example of the entrance / exit) is provided. In addition, a lower entrance / exit 3b (an example of an entrance / exit floor) is provided at the entrance of the lower floor 101 in the longitudinal direction of the frame 2. The upper landing floor 3a is supported by the upper floor 100, and the lower landing floor 3b is supported by the lower floor 101.

  A comb plate 15a shown in FIG. 2 to be described later is attached to the upper boarding / alighting floor 3a, and the upper horizontal section 9A is horizontally disposed on the back surface of the comb plate 15a (an example of the side where the comb plate 15a faces the tread plate 11). A displacement detector 16a is provided that is attached to the moving step 6 and detects the displacement of the tread plate 11 in the height direction. As shown in FIG. 6B described later, the displacement of the tread board 11 is a displacement from the displacement detection sensor 17 to the peak of the groove formed on the upper surface of the tread board 11, which is detected by the displacement detection sensor 17 included in the displacement detection unit 16 a. It is. A comb plate 15b similar to the comb plate 15a is attached to the lower boarding / alighting floor 3b, and the lower horizontal section 9B is horizontally disposed on the back surface of the comb plate 15b (an example of the side where the comb plate 15b faces the tread plate 11). A displacement detector 16b that is attached to the moving step 6 and detects the displacement of the tread plate 11 in the height direction is provided.

  A plurality of grooves are formed in the tread plate 11 in parallel with the traveling direction of the step 6. Due to this groove, peaks and valleys appear alternately in the width direction of the tread plate 11. The tread board 11 is formed, for example, by bending a thin plate of SUS (stainless steel).

  The displacement detector 16a detects the displacement of the tread 11 in the height direction in the upper horizontal section 9A. The displacement detector 16b detects the displacement of the tread 11 in the height direction in the lower horizontal section 9B. The displacement detection units 16a and 16b are connected to the control unit 7 by wire or wirelessly. The displacement of the tread 11 detected by a displacement detection sensor 17 (see FIG. 2 to be described later) included in the displacement detectors 16a and 16b is an analog signal or a digital signal (hereinafter referred to as “sensor output signal”). Sent to.

  A plurality of steps 6 are movably supported on the frame 2. The plurality of steps 6 are connected endlessly via a step chain (not shown), and driven by a drive unit 8 that moves the steps 6 up and down to a guide rail (not shown) attached to the frame 2. Guided and circulated between the upper floor 100 and the lower floor 101. Passengers are transported on the steps 6 moving on the outward side. In FIG. 1, since the passenger conveyor 1 is running up, the forward step 6 advances along the driving direction A.

  The balustrade part 4 is supported by the upper part of the frame 2, and is arrange | positioned at the both sides of the width direction of the frame 2. As shown in FIG. A handrail 5 is movably provided in the balustrade part 4. The handrail 5 is supported by the balustrade part 4 so as to be movable in the same direction as the plurality of steps 6.

  A control unit 7 and a drive unit 8 are stored in the lower part of the upper boarding / alighting floor 3 a in the frame 2. The control unit 7 controls the operation of the drive unit 8. The control unit 7 also functions as an abnormality detection device that executes predetermined calculation processing based on the sensor output signals received from the displacement detection units 16 a and 16 b and detects an abnormality occurring in the tread board 11. For example, the control unit 7 obtains a displacement amount from the reference displacement based on the displacement of the tread board 11 detected by the displacement detection units 16a and 16b. The reference displacement is a value equal to the displacement of the tread board 11 when the tread board 11 is normal. As shown in FIG. 6B to be described later, the control unit 7 uses a threshold value th1 and a threshold value th2 that are used to detect an abnormality of the tread board 11 before the tread board 11 contacts the comb teeth 18 based on the displacement amount from the reference displacement. Is exceeded, it is detected that an abnormality has occurred in the tread board 11. Examples of the abnormality detected by the control unit 7 include lifting and sinking of the tread plate 11, a missing tread plate 11, a missing step 6 and the like. For this reason, the control part 7 performs different operation | movement for coping with abnormality of the tread 11 for every different threshold value th1 and th2 from which the displacement amount from a reference | standard displacement exceeds. For example, the control unit 7 performs a control to issue an alarm to the monitoring unit 10 or stop the operation of the passenger conveyor 1 by stopping the driving of the plurality of steps 6 with respect to the driving unit 8. .

  The monitoring unit 10 is, for example, a PC (Personal Computer) or a lamp provided in the monitoring room. The alarm issued to the monitoring unit 10 can be recognized by the maintenance staff by displaying the screen on the PC or turning on the lamp.

  FIG. 2 is an explanatory diagram showing an installation example of the displacement detector 16a attached to the back surface of the comb plate 15a.

  The end where the comb plate 15a is attached to the upper boarding / alighting floor 3a is called a comb plate base end portion 12, and the end where the comb teeth 18 are attached to the comb plate 15a is called a comb plate tip portion 13. The comb teeth 18 are made of ceramic, for example. And the displacement detection part 16a is comprised because the several detection unit 14 is arrange | positioned adjacent to the back surface of the comb board 15a and the comb board front-end | tip part 13 in the width direction. The detection unit 14 includes three displacement detection sensors 17 arranged at equal intervals in the width direction. The displacement detection sensor 17 is, for example, an eddy current sensor, and measures the displacement of the tread 11 in a non-contact manner from the position where the displacement detection sensor 17 (displacement detection unit 16a) is attached for each displacement detection sensor 17. Can do. Then, a sensor output signal is transmitted to the control unit 7 for each displacement detection sensor 17.

The comb plate 15a can be replaced, and the detection unit 14 can also be replaced. Further, the number of displacement detection sensors 17 included in the detection unit 14 may be arbitrarily increased or decreased, and the number of detection units 14 included in the comb plate 15a may be arbitrarily increased or decreased.
The displacement detection unit 16b is also configured by a plurality of detection units 14 similarly to the displacement detection unit 16a, and is installed on the back surface of the comb plate 15b.

  FIG. 3 is a block diagram illustrating an internal configuration example of the control unit 7.

The control unit 7 includes a signal reception unit 21, a recording unit 22, and a calculation unit 23.
The signal receiver 21 receives a sensor output signal transmitted from the displacement detection sensor 17 included in the displacement detectors 16a and 16b. And the signal receiving part 21 converts the received sensor output signal into the displacement to the tread board 11, and records it for a fixed time. The signal receiving unit 21 may measure the displacement of the tread 11 by combining sensor output signals detected by a plurality of adjacent displacement detection sensors 17.

  The recording unit 22 records displacement thresholds th1 and th2 (shown in FIG. 6B described later) and a reference displacement used by the calculation unit 23 to detect an abnormality of the tread board 11. The threshold th1 (an example of the first threshold) includes a reference displacement shown in FIG. 6B described later, and the threshold th2 (an example of the second threshold) is wider than the threshold th1. The threshold th1 represents a range where the tread board 11 and the comb teeth 18 do not contact each other, and the threshold th2 represents a range immediately before the tread board 11 and the comb teeth 18 contact each other. The threshold value th2 is used to detect an abnormality of the tread board 11 even when the tread board 11 is missing even if the tread board 11 and the comb teeth 18 do not contact each other and the displacement of the tread board 11 becomes too large.

  The calculation unit 23 calculates a displacement amount from the reference displacement based on the displacement up to the tread board 11 converted by the signal reception unit 21. Then, the calculation unit 23 compares the displacement amount from the reference displacement with the threshold values th1 and th2 read from the recording unit 22. The calculation unit 23 determines that the tread board 11 is normal if the amount of displacement from the reference displacement is within the threshold th1. On the other hand, when the amount of displacement from the reference displacement exceeds the threshold th1 and is within the threshold th2, the calculation unit 23 displays an alarm including step identification information for identifying the step 6 in which an abnormality has occurred. To report. And the calculating part 23 controls the drive part 8, and the operation | movement of the passenger conveyor 1 is stopped when the displacement amount from reference | standard displacement exceeds threshold value th2.

Next, the hardware configuration of the computer C configuring the control unit 7 of the passenger conveyor 1 will be described.
FIG. 4 is a block diagram illustrating a hardware configuration example of the computer C.

  The computer C is hardware used as a so-called computer. The computer C includes a CPU (Central Processing Unit) C1, a ROM (Read Only Memory) C2, a RAM (Random Access Memory) C3, a nonvolatile storage C5, and a network interface C6 respectively connected to the bus C4.

  The CPU C1 reads out the program code of software that implements each function according to the present embodiment from the ROM C2 and executes it. In the RAM C3, variables, parameters and the like generated during the arithmetic processing are temporarily written. The CPU C1 executes the program code corresponding to the calculation unit 23 recorded in the ROM C2, thereby realizing the function of the calculation unit 23. Then, the calculation unit 23 operating on the CPU C1 can calculate the displacement amount from the reference displacement, determine whether the tread 11 is normal or abnormal based on the comparison between the displacement amount from the reference displacement and the thresholds th1 and th2. It becomes possible.

  As the nonvolatile storage C5, for example, an HDD (Hard Disk Drive), an SSD (Solid State Drive), a flexible disk, an optical disk, a magneto-optical disk, a CD-ROM, a CD-R, a magnetic tape, a nonvolatile memory, or the like is used. It is done. In the nonvolatile storage C5, in addition to the OS (Operating System) and various parameters, a program for causing the computer C to function is recorded. The ROM C2 and the non-volatile storage C5 record programs and data necessary for the operation of the CPU C1, and are computer-readable non-transitory recording media storing programs executed by the computer C. Used as an example. For this reason, this program is permanently stored in the ROM C2 and the non-volatile storage C5. The recording unit 22 shown in FIG. 3 is configured, for example, in the nonvolatile storage C5, and records step identification information for identifying the step 6 in which an abnormality is detected, in addition to the threshold th1 and the threshold th2. .

  For example, a network interface card (NIC) or the like is used as the network interface C6, and various types of data can be transmitted and received between devices via a LAN (local area network) connected to a terminal, a dedicated line, or the like. is there. The network interface C6 is used for the signal receiving unit 21, for example. The network interface C6 is provided between the calculation unit 23, the drive unit 8, and the monitoring unit 10.

  Next, examples of the shapes of the comb teeth 18 and the tread board 11 will be described with reference to FIGS. 5 and 6. Here, the comb plate 15a, the displacement detection unit 16a, and the comb teeth 18 provided on the upper landing floor 3a will be described, and the comb plate 15b, the displacement detection unit 16b, the comb teeth provided on the lower landing floor 3b having the same configuration. The description of 18 is omitted.

  FIG. 5 is an enlarged view of the upper boarding / alighting floor 3 a showing the relationship between the comb teeth 18 and the normal tread plate 11. FIG. 5A shows an example of an enlarged view of the vicinity of the tip of the upper boarding / alighting floor 3a, and FIG. 5B shows the comb plate 15a and the tread board 11 viewed from the X direction (the direction indicated by the arrow B in FIG. 5A) in the upper horizontal section 9A. An example is shown.

  As shown in FIG. 5A, the comb plate tip 13 of the comb plate 15a attached to the tip of the upper boarding / exiting floor 3a is provided with comb teeth 18 that mesh with the ridges and valleys of the grooves formed in the tread plate 11. And the displacement detection part 16a is attached to the back surface of the comb plate 15a as shown in FIG.

  In FIG. 5B, the displacement detector 16a attached to the back surface of the comb plate 15a is represented by a broken line. Further, in order to identify a plurality of comb plates 15a, in the drawing, they are represented as comb plates 15a (1) and comb plates 15a (2) from the left. A state in which the plurality of displacement detection sensors 17 included in the displacement detection unit 16a detect the displacement from the mounting position of the displacement detection unit 16a to the peak of the groove formed in the tread plate 11 is indicated by a downward arrow. Here, when the reference displacement is “0”, the + Z direction is referred to as “+ displacement”, and the −Z direction is referred to as “− displacement”.

In a state where no abnormality has occurred in the tread plate 11, the displacement D0 to the tread plate 11 (reference displacement) detected by the displacement detection unit 16a, that is, the plurality of displacement detection sensors 17, is the same. Therefore, the displacement amount from the reference displacement is “0”.
Note that the comb plate 15b and the displacement detection unit 16b attached to the lower boarding / alighting floor 3b have the same configuration as the comb plate 15a and the displacement detection unit 16a and perform the same operation, and thus detailed description thereof is omitted.

  FIG. 6 is an enlarged view of the upper boarding / alighting floor 3a showing the relationship between the comb teeth 18 and the tread 11 where an abnormality has occurred. FIG. 6A shows an example in which the vicinity of the front end of the upper boarding / alighting floor 3a is enlarged, and FIG. 6B shows an example in which the comb plate 15a and the tread plate 11 are viewed from the X direction (the direction indicated by the arrow B in FIG. 6A).

  FIG. 6A shows an example in which a part of the tread 11 is lifted. At this time, the displacement D1 of the tread board 11 from the displacement detection sensor 17 is shorter than the displacement D0 recorded in the recording unit 22 as a reference displacement.

  FIG. 6B shows an example in which a part of the tread 11 is lifted and an example in which a part of the tread 11 is missing. 6B schematically illustrates a state in which the displacement D1 of the tread 11 is measured for each displacement detection sensor 17 included in the displacement detection unit 16a.

  For example, when the amount of displacement from the reference displacement is ± 2 mm, although there is a low possibility that the tread board 11 and the comb teeth 18 are in immediate contact, it is necessary to alert the maintenance staff of the passenger conveyor 1 and the like. For this reason, if a range of ± 2 mm with respect to the reference displacement is set as the threshold th1, the calculation unit 23 issues an alarm to the monitoring unit 10 when the amount of displacement from the reference displacement exceeds the threshold th1. For example, when the amount of displacement from the reference displacement is ± 4 mm, the possibility that the tread board 11 and the comb teeth 18 immediately contact each other increases. For this reason, if a range of ± 4 mm with respect to the reference displacement is set as the threshold value th2, the calculation unit 23 stops the operation of the passenger conveyor 1 when the amount of displacement from the reference displacement exceeds the threshold value th2. It should be noted that the thresholds th1 and th2 may be different in the amount of displacement in the + Z direction and the −Z direction with respect to the reference displacement.

  In the portion 20a magnified in FIG. 6B, it is indicated that the peak of the tread 11 reaches the threshold th1 when a part of the tread 11 is lifted. At this time, the displacement D1 detected by the displacement detection sensor 17 is shorter than the displacement D0 indicated by the reference displacement, and the displacement amount from the reference displacement exceeds the threshold th1. For this reason, an alarm is issued by the calculation unit 23.

  In addition, in the portion 20b magnified in FIG. 6B, the mountain lacking the tread 11 reaches the threshold th1. At this time, the displacement D2 detected by the displacement detection sensor 17 is longer than the displacement D0 indicated by the reference displacement, and the displacement amount from the reference displacement exceeds the threshold th1. Also in this case, an alarm is issued by the calculation unit 23.

  FIG. 7 is a flowchart illustrating a processing example of the control unit 7 that detects abnormality of the tread board 11. In the drawing, the displacement detection sensor 17 is abbreviated as “sensor”. Further, in the process shown in FIG. 7, an example using the displacement detection unit 16a provided mainly on the upper getting-on / off floor 3a will be described, and the displacement detection unit 16b provided on the lower getting-on / off floor 3b in which the same operation is performed. Description of the example using is omitted.

  First, the control unit 7 determines whether or not the passenger conveyor 1 is in operation (S1). When the passenger conveyor 1 is not in operation (NO in S1), the control unit 7 continues the process in step S1. When the passenger conveyor 1 is in operation (YES in S1), the displacement detection sensor 17 detects the displacement of the tread board 11 (S2). A sensor output signal indicating the displacement of the tread board 11 detected by the displacement detection sensor 17 is transmitted to the control unit 7.

  The signal receiving unit 21 of the control unit 7 receives the sensor output signal and converts the sensor output signal into a displacement of the tread board 11. Then, the calculation unit 23 obtains a displacement amount from the reference displacement based on the displacement of the tread board 11 acquired from the signal receiving unit 21, and the displacement amount from the reference displacement and a threshold value th <b> 1 preset in the recording unit 22. Comparison with the threshold th2 is performed (S3).

  First, the calculation unit 23 determines whether or not the displacement amount from the reference displacement exceeds the threshold th1 (S4). When the amount of displacement from the reference displacement does not exceed the threshold th1 (NO in S4), the calculation unit 23 determines that the tread 11 is normal and returns to step S2.

  When the amount of displacement from the reference displacement exceeds the threshold th1 (YES in S4), the calculation unit 23 records the step identification information of the step 6 that exceeds the threshold th1 in the recording unit 22 (S5). Next, the computing unit 23 determines whether or not the amount of displacement from the reference displacement exceeds the threshold th2 (S6). When the amount of displacement from the reference displacement exceeds the threshold th2 (YES in S6), the calculation unit 23 is highly likely to contact the tread plate 11 and the comb teeth 18 or the step 6 may be missing. The operation of the passenger conveyor 1 is stopped (S7).

  When the displacement amount from the reference displacement does not exceed the threshold th2 (NO in S6), the calculation unit 23 determines that there is no abnormality in which the tread board 11 and the comb teeth 18 are in contact or the tread board 11 is missing. Then, the calculation unit 23 issues an alarm to the monitoring unit 10 together with the step identification information recorded in the recording unit 22 with the sign that the step 6 whose displacement from the reference displacement is increasing is present (S8). . The calculation unit 23 continues the operation of the passenger conveyor 1 at the stage where the abnormality sign is issued.

  In the passenger conveyor 1 according to the first embodiment described above, the displacement detectors 16a and 16b attached to the comb plates 15a and 15b at the entrance / exit are displaced in the height direction of the step 6 that moves in a horizontal state. Is always detected. At this time, the groove formed in the tread plate 11 and the comb teeth 18 attached to the tips of the comb plates 15a and 15b are engaged with each other. Movement in the width direction is restricted. For this reason, the calculation unit 23 can accurately calculate the amount of displacement from the reference displacement in the height direction of the tread board 11 based on the displacement of the tread board 11 detected by the displacement detection sensor 17. Further, in the upper horizontal section 9A and the lower horizontal section 9B, since the movement of the step 6 in the height direction is small, it becomes easy for the displacement detection sensor 17 to detect only the displacement of the tread 11 in the height direction.

  Then, the arithmetic unit 23 issues an alarm to the monitoring unit 10 when the displacement amount from the reference displacement exceeds the threshold value th1, and the passenger when the displacement amount from the reference displacement exceeds the threshold value th2. The conveyor 1 is immediately stopped. For this reason, it is possible to prevent damage to the comb teeth 18 and the comb plates 15a and 15b due to contact with the tread plate 11 in which an abnormality has occurred.

  Moreover, the displacement detection sensor 17 is previously installed in the detection unit 14, and the operation | work which attaches the detection unit 14 to the comb-plate front-end | tip part 13 is easy. For this reason, the effort which attaches the displacement detection sensor 17 to the comb plates 15a and 15b is reduced, and installation cost can also be reduced.

  In addition, since the step board 11 in which an abnormality has occurred is specified by the step identification information, only the specified step board 11 can be replaced by an operator. For this reason, it is not necessary to replace the step 6, and the replacement work can be facilitated.

[Second Embodiment]
In this embodiment, the control unit 7 of the passenger conveyor 1 that detects a failure of the displacement detection sensor 17 itself and adjusts the value of the sensor output of the displacement detection sensor 17 will be described.

  FIG. 8 is a flowchart illustrating a processing example of the control unit 7 that detects an abnormality of the tread board 11. The control unit 7 can automatically adjust the displacement detection sensor 17 and determine a failure. In the drawing, the displacement detection sensor 17 is abbreviated as “sensor”. Further, in the process shown in FIG. 8, an example using the displacement detection unit 16a provided mainly on the upper getting-on / off floor 3a will be described, and the displacement detection unit 16b provided on the lower getting-on / off floor 3b in which the same operation is performed. Description of the example using is omitted.

  First, the control unit 7 determines whether or not the passenger conveyor 1 is in operation (S11). When the passenger conveyor 1 is not in operation (NO in S11), the control unit 7 continues the process of step S1. When the passenger conveyor 1 is in operation (YES in S11), the calculation unit 23 checks the output of the displacement detection sensor 17 (S12). The output check of the displacement detection sensor 17 is performed in order to determine in advance whether or not an abnormal value is included in the sensor output signal output for each displacement detection sensor 17.

  Therefore, in the output check of the displacement detection sensor 17, the displacement of the tread 11 for one round is recorded in the recording unit 22, and the calculation unit 23 is set in advance in the recording unit 22 and the displacement of the tread 11 for one round. Compare with normal values. Further, in the output check, as shown in FIG. 5, the output is obtained from the sensor output signal output from the displacement detection sensor 17 included in the displacement detection unit 16 a attached to the adjacent comb plates 15 a (1) and 15 a (2). This is also performed by the calculation unit 23 comparing the displacement of the tread board 11.

  After performing the output check of the displacement detection sensor 17, the calculation unit 23 determines whether there is a displacement detection sensor 17 that outputs a sensor output signal of an abnormal displacement (S13). When there is no displacement detection sensor 17 that outputs an abnormal displacement sensor output signal (NO in S13), the process proceeds to step S18. When there is a displacement detection sensor 17 that outputs an abnormal displacement sensor output signal (YES in S13), the calculation unit 23 notifies the monitoring unit 10 that there is an output abnormality of the displacement detection sensor 17 (S14). .

  Next, the computing unit 23 checks whether or not the output abnormality of the displacement detection sensor 17 is a hardware failure caused by the displacement detection sensor 17 (S15). For example, if a sensor output signal that does not include the displacement of the tread plate 11 is output from the specific displacement detection sensor 17 even if the step 6 goes around, the calculation unit 23 indicates that the displacement detection sensor 17 has a hardware failure. (YES in S15). Then, the calculation unit 23 invalidates the output of the specific displacement detection sensor 17 determined to have a hardware failure (S17), and proceeds to step S18. By this invalidation process, the value of the sensor output signal output from the specific displacement detection sensor 17 is not used for the process in which the calculation unit 23 obtains the displacement amount from the reference displacement. The invalidation process may be performed only on the specific displacement detection sensor 17 or may be performed on a plurality of displacement detection sensors 17 included in the detection unit 14 including the specific displacement detection sensor 17 to be replaced.

On the other hand, the value of the sensor output signal output from the displacement detection sensor 17 may differ from the reference value by a predetermined value or more. For example, the average value of the sensor output signal output from one displacement detection sensor 17 is different from the reference value, and the difference from the value of the sensor output signal output from another displacement detection sensor 17 adjacent to the displacement detection sensor 17 is different. Is the case. At this time, the calculation unit 23 determines that an adjustment deviation has occurred in the displacement detection sensor 17 (NO in S15). Then, the calculation unit 23 adjusts the value of the sensor output signal output from the displacement detection sensor 17 so that the value of the sensor output signal output from the displacement detection sensor 17 in which the adjustment deviation has occurred matches the reference value (S16). ), And proceeds to step S18.
In addition, the output check of the displacement detection sensor 17 in steps S12 to S17 is performed periodically (for example, once every time the tread plate 11 makes one round).

  After NO, S16, and S17 in step S13, the displacement detection sensor 17 detects the displacement of the tread board 11 (S18). Then, the calculation unit 23 obtains a displacement amount from the reference displacement based on the displacement of the tread board 11, and compares the displacement amount from the reference displacement with the threshold values th1 and th2 set in the recording unit 22 in advance. Perform (S19).

  Next, the computing unit 23 determines whether or not the amount of displacement from the reference displacement exceeds the threshold th1 (S20). When the amount of displacement from the reference displacement does not exceed the threshold th1 (NO in S20), the computing unit 23 returns to step S18 assuming that the tread 11 is normal. When the amount of displacement from the reference displacement exceeds the threshold th1 (YES in S20), the calculation unit 23 records the identification information of the step 6 that exceeds the threshold th1 in the recording unit 22 (S21).

  Next, the computing unit 23 determines whether or not the amount of displacement from the reference displacement exceeds the threshold th2 (S22). When the amount of displacement from the reference displacement exceeds the threshold th2 (YES in S22), the calculation unit 23 determines that there is a possibility that the tread board 11 and the comb teeth 18 are in contact or the step 6 is missing. The operation is stopped (S23).

  When the amount of displacement from the reference displacement does not exceed the threshold th2 (NO in S22), the calculation unit 23 indicates that there is no abnormality in which the tread plate 11 and the comb teeth 18 are in contact or the step 6 is missing. to decide. Then, the calculation unit 23 issues a warning to the monitoring unit 10 together with the step identification information recorded in the recording unit 22 with the sign that the greatly displaced tread 11 is present (S24), and continues the operation of the passenger conveyor 1 To do.

  In the passenger conveyor 1 according to the second embodiment described above, the adjustment of the displacement detection sensor 17 itself can be automated. For this reason, the attachment adjustment of the displacement detection sensor 17 becomes easy, and the abnormality detection device for the passenger conveyor 1 can be realized at a low running cost.

  In addition, the calculation unit 23 invalidates the output from the displacement detection sensor 17 that has detected the hardware failure, so that the detection result of the displacement of the tread 11 detected by the normal displacement detection sensor 17 is not affected. . In addition, since only the detection unit 14 including the displacement detection sensor 17 in which a hardware failure is detected can be replaced with the detection unit 14 including the normal displacement detection sensor 17, the replacement operation of the displacement detection sensor 17 is easy. It becomes.

[Modification]
In addition, in the passenger conveyor 1 which concerns on each example of embodiment mentioned above, although the displacement detection parts 16a and 16b were each provided in the upper boarding / alighting floor 3a and the lower boarding / alighting floor 3b, only either of the displacement detection parts 16a and 16b is provided. It may be provided. In this case, any one of the displacement detectors 16 a and 16 b may be provided in the driving direction of the passenger conveyor 1. For example, as shown in FIG. 1, when the passenger conveyor 1 is running up, only the displacement detector 16a may be provided on the upper boarding / alighting floor 3a. On the contrary, when the passenger conveyor 1 is descending, only the displacement detector 16b may be provided on the lower landing floor 3b.

  Moreover, the passenger conveyor 1 which concerns on each embodiment mentioned above was an escalator provided ranging between an upper floor and a lower floor. However, the passenger conveyor 1 may be a moving sidewalk or the like that is provided in a relatively flat place and has a structure in which the midpoints of the plurality of steps 6 are not flat but maintain a flat state.

  In addition, the displacement detection sensor 17 according to each embodiment described above detects the displacement of the tread 11 using eddy currents, but the laser beam, capacitance, ultrasonic waves, etc. are used to detect the tread 11. You may measure a displacement.

  Further, the displacement detection sensor 17 may measure the displacement from the position where the displacement detection sensor 17 is attached to the trough of the groove formed in the tread plate 11. In this case, the reference displacement may be the position of the trough of the groove formed in the tread plate 11.

  Further, although the threshold value is for the reference displacement, a range not including the reference displacement may be used as the threshold value. Further, the threshold value may represent a certain range with the reference displacement as the lower limit value, or may represent a certain range with the reference displacement as the upper limit value. Three or more types of threshold values may be set in the recording unit 22, or only one threshold value may be set in the recording unit 22.

It should be noted that the present invention is not limited to the above-described embodiments, and various other application examples and modifications can be taken without departing from the gist of the present invention described in the claims.
For example, the above-described exemplary embodiments describe the configuration of the apparatus and the system in detail and specifically for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. In addition, it is possible to replace a part of the configuration of the exemplary embodiment described here with the configuration of another exemplary embodiment, and it is also possible to add the configuration of another exemplary embodiment to the configuration of one exemplary embodiment. Is possible. Moreover, it is also possible to add, delete, and replace other configurations for a part of the configuration of each exemplary embodiment.
Further, the control lines and information lines indicate what is considered necessary for the explanation, and not all the control lines and information lines on the product are necessarily shown. Actually, it may be considered that almost all the components are connected to each other.

  DESCRIPTION OF SYMBOLS 1 ... Passenger conveyor, 6 ... Step, 7 ... Control part, 8 ... Drive part, 10 ... Monitoring part, 11 ... Tread board, 12 ... Comb board base end part, 13 ... Comb board front end part, 14 ... Detection unit, 15a, 15b ... comb plate, 16a, 16b ... displacement detection unit, 17 ... displacement detection sensor, 18 ... comb teeth, 21 ... signal receiving unit, 22 ... recording unit, 23 ... calculation unit

Claims (8)

In the passenger conveyor in which a plurality of steps connected in an endless manner are circulated by the drive unit,
Comb teeth that engage with the treads provided on the steps are provided at the tips, and are attached to the boarding floor,
A displacement detector that is attached to the comb plate on the side facing the tread plate and detects a displacement in the height direction of the tread plate that moves horizontally, in a non-contact manner with the tread plate;
The amount of displacement from the reference displacement obtained based on the displacement of the tread exceeds one of a plurality of threshold values provided for detecting an abnormality of the tread before the tread contacts the comb teeth. In this case, it is detected that an abnormality has occurred in the tread, and an operation for coping with the abnormality in the tread is performed.At that time, according to the type of the threshold that exceeds the amount of displacement from the reference displacement , passenger conveyor and a control unit for changing the contents of the operation to cope with abnormality of the step board. The threshold value is a first threshold value with respect to a reference displacement and a second threshold value wider than the first threshold value,
The control unit issues an alarm to a monitoring unit when a displacement amount from the reference displacement exceeds the first threshold value, and drives when the displacement amount from the reference displacement exceeds the second threshold value. The passenger conveyor according to claim 1, wherein control for stopping driving of the steps is performed on the section. The controller is
A recording unit for recording the first threshold and the second threshold;
A step of recording step identification information for identifying the step in which the displacement of the step board exceeds the first threshold value and the second threshold value in the recording unit, and issuing the alarm including the step identification information; The passenger conveyor according to claim 2. The displacement detection unit is a plurality of replaceable detection units, from a position where the displacement detection sensor is attached to each of the plurality of displacement detection sensors included in each detection unit to a peak of a groove formed in the tread. The passenger conveyor according to claim 3 which measures displacement. The passenger conveyor according to claim 4, wherein the calculation unit adjusts a value output by the displacement detection sensor that is different from a reference value by a predetermined value or more to the reference value. The passenger conveyor according to claim 5, wherein when the displacement of the tread is not output from the specific displacement detection sensor, the calculation unit invalidates a value output from the specific displacement detection sensor. In an abnormality detection device for a passenger conveyor in which a plurality of steps connected endlessly are circulated by a drive unit,
A comb tooth that meshes with the tread provided on the step is provided at the tip, and is detected in a non-contact manner with the tread by a displacement detection unit that is attached to a side of the comb plate that is attached to the landing floor and faces the tread. A plurality of types of displacement amounts from a reference displacement obtained based on a displacement in the height direction of the tread that moves to the tread are provided for detecting an abnormality in the tread before the tread contacts the comb teeth. if it exceeds either threshold above detects that abnormality occurs in the tread plate, performs an operation to deal with the abnormality of the tread plate, this time, the amount of displacement from the reference displacement is exceeded depending on the type of threshold, the abnormality detecting device of a passenger conveyor comprising a control unit for changing an abnormally contents of operation for addressing the step board. In the abnormality detection method of a passenger conveyor in which a plurality of steps connected endlessly circulates and moves by a drive unit,
Displacement in the height direction of the tread plate that is horizontally moved by a displacement detecting unit that is provided at the tip with a comb tooth that meshes with a tread plate provided on the step, and that is mounted on a side of the comb plate that is attached to a landing floor facing the tread plate Detecting the non-contact with the tread ;
The amount of displacement from the reference displacement obtained based on the displacement of the tread exceeds one of a plurality of threshold values provided for detecting an abnormality of the tread before the tread contacts the comb teeth. In this case, it is detected that an abnormality has occurred in the tread, and an operation for coping with the abnormality in the tread is performed.At that time, according to the type of the threshold that exceeds the amount of displacement from the reference displacement , abnormality detecting method for a passenger conveyor comprising a step of changing the contents of the operation to cope with abnormality of the step board.

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