Lifting detection device, passenger conveyor system, and lifting detection method

Abstract

To provide a lifting detection device capable of identifying each step without being influenced by an on-site environment.SOLUTION: A lifting detection device detects the footboard lifting of steps for a passenger conveyor with multiple steps connected endlessly and cyclically moving. The lifting detection device is equipped with a contact member to contact with the footboard of the steps, a displacement sensor to detect the displacement of the contact member, and a ranging sensor to detect the gap between the steps.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention generally relates to detecting the amount of lift of a step tread of a passenger conveyor. [Background technology]

[0002] An escalator comprises a frame installed in a building structure and multiple steps connected in an endless manner within the frame that move in a circular motion. An endless chain is connected to the multiple steps, and the steps move in a circular motion when the chain rotates. The treads on which people stand can sometimes become loose due to external factors or the installation environment. External factors include pebbles getting caught in the corrugated parts of the treads, or the corrugated parts of the treads being deformed due to improper handling, which causes repeated stress when people stand on them. The installation environment refers to an outdoor environment, for example, where the treads are exposed to rain and rust.

[0003] A conventional method for inspecting the lifting of step treads involves contacting a detection rod that detects lifting with the step tread to measure the amount of displacement, and calculating the amount of lifting for each step from the change in brightness between the tread and the demarcation attached to the tread using image data captured by a camera (see Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-66537 Summary of the Invention [Problem to be solved by the invention]

[0005] The technology described in Patent Document 1 detects each step from the change in brightness between the step and the demarcation attached to the step. However, depending on the site environment, such as an extremely bright environment, an extremely dark environment, or an environment where steps are installed without demarcation, it is not possible to detect each individual step.

[0006] The present invention has been made in consideration of the above points, and aims to propose a lift-up detection device etc. that can identify each step regardless of the on-site environment. [Means for solving the problem]

[0007] In order to solve this problem, the present invention provides a lift-up detection device for detecting the lift-up of the treads of a step in a passenger conveyor having a plurality of steps connected in an endless manner that moves in a circular motion, and is provided with a contact member that contacts the treads of the steps, a displacement sensor that detects the displacement of the contact member, and a distance sensor that detects the gap between the steps.

[0008] According to the above configuration, the gaps between the steps are detected using a distance measuring sensor, so that each step can be identified without being affected by the site environment, for example. [Effects of the Invention]

[0009] According to the present invention, it is possible to realize a highly convenient floating detection device, etc. Problems, configurations, and effects other than those described above will become apparent from the following description of the embodiment. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a diagram showing an example of the configuration of an escalator according to a first embodiment. FIG. [Figure 2] FIG. 2 is a diagram showing an example of a configuration relating to steps according to the first embodiment. [Figure 3] 1 is a diagram showing an example of the configuration of a lift-up detection device according to a first embodiment; [Figure 4] 3 is a diagram showing an example of a detection mechanism for detecting the amount of displacement of a tread according to the first embodiment. FIG. [Figure 5] 1 is a diagram illustrating an example of a system configuration of a lift-up detection device according to a first embodiment. [Figure 6] 1 is a diagram showing an example of an installation state of a lift-up detection device according to a first embodiment. [Figure 7] 1 is a diagram showing an example of an installation state of a lift-up detection device according to a first embodiment. [Figure 8] FIG. 3 is a diagram illustrating an example of signal data according to the first embodiment. [Figure 9] FIG. 2 is a diagram illustrating an example of a lift-up detection method according to the first embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] (I) First embodiment An embodiment of the present invention will be described in detail below, but the present invention is not limited to the embodiment.

[0012] This embodiment relates to a technique for calculating the amount of lift of a step tread for each step provided on a passenger conveyor. The passenger conveyor may be an escalator, an auto line, or the like.

[0013] The lifting detection device of this embodiment includes a distance measurement sensor for detecting gaps between steps. The distance measurement sensor is an example of a means for detecting gaps between steps. The distance measurement sensor is an optical sensor, an ultrasonic sensor, or the like. The optical sensor may be, for example, a LiDAR (Light Detection And Ranging) sensor, or more specifically, a ToF (Time Of Flight) sensor. The distance measurement sensor may also be a millimeter wave sensor, a Radar (Radio Detecting and Ranging), or the like. The lifting detection device identifies (detects) each step using distance measurement data acquired by the distance measurement sensor.

[0014] More specifically, the lift detection device is equipped with a displacement sensor that detects the up and down movement of a contact member that comes into contact (grounds) with the step treads on a passenger conveyor having multiple steps connected in an endless manner that moves in a circular motion, and a distance measuring sensor that can detect the distance to the step treads.

[0015] The distance measuring sensor is installed on the body of the lift detection device facing downward so as to irradiate the step tread with laser light, radio waves, ultrasonic waves, etc. The distance measuring sensor is also installed so as to detect the gap between the steps between a comb plate provided on the comb plate and a contact member of the lift detection device when the passenger conveyor is installed on site.

[0016] The lift-up detection device detects step boundaries based on the distance measured by the distance sensor, and calculates the amount of lift of the tread for each step based on the amount of displacement measured by the displacement sensor. With this configuration, it is possible to identify each step and calculate the amount of lift of the tread for each step, regardless of the site environment.

[0017] The designations "first," "second," "third," etc. in this specification are used to identify components and do not necessarily limit the number or order. Furthermore, numbers used to identify components are used in different contexts, and numbers used in one context do not necessarily indicate the same configuration in another context. Furthermore, this does not prevent a component identified by a certain number from also serving the function of a component identified by another number.

[0018] Next, an embodiment of the present invention will be described with reference to the drawings. The following description and drawings are examples for explaining the present invention, and some omissions and simplifications have been made as appropriate for clarity of explanation. The present invention can be implemented in various other forms. Unless otherwise specified, each component may be singular or plural.

[0019] In FIG. 1, 100 generally denotes an escalator according to a first embodiment.

[0020] The escalator 100 includes a frame 101 installed in a building structure, a control panel 102, a balustrade 103, steps 104, handrails 105, and a drive mechanism 106.

[0021] The drive mechanism 106 includes an electric motor 107 and a reducer 108. Electric power is supplied to the electric motor 107 from the control panel 102. The operation of the electric motor 107 is controlled by the control panel 102. A belt member (not shown) is wound around a drive pulley of the electric motor 107. The belt member is wound around a driven pulley of the reducer 108. As a result, the rotational force of the electric motor 107 is transmitted to the reducer 108 via the belt member.

[0022] A transmission chain 109 is wound around the transmission sprocket of the reducer 108. The transmission chain 109 is wound around a drive sprocket 110. The driving force of the drive mechanism 106 is transmitted to the drive sprocket 110 via the transmission chain 109, causing the drive sprocket 110 to rotate.

[0023] A step chain 112 is wound around the drive sprocket 110 and the driven sprocket 111. When the drive sprocket 110 rotates, the driven sprocket 111 and the step chain 112 rotate.

[0024] Furthermore, a guide member (not shown) is provided on the frame body 101, and the plurality of steps 104 are movably supported by the guide member. The plurality of steps 104 are endlessly connected via a step chain 112. The plurality of steps 104 are guided by the guide member attached to the frame body 101 and move cyclically between the outbound side and the inbound side. Passengers are transported by riding on the steps 104 moving on the outbound side.

[0025] Next, step 104 for calculating the amount of lift of the tread 202 using the lift detection method will be described with reference to FIG.

[0026] The step 104 is provided with a frame body 201, a tread 202, and a demarcation 203. The tread 202 is the part on which people stand, has a corrugated shape, and is fixed to the frame body 201 by welding at multiple points. The demarcations 203 are warning parts that prevent people from stepping on the step boundary, and are provided on all four sides of the tread 202.

[0027] Regarding the demarcation 203, depending on the site specifications (moving walkway, etc.), there are escalators 100 that are yellow in color, black in color, or that do not have demarcation 203 at all.

[0028] Next, the lift-up detection device 300 used to calculate the amount of lift for each tread 202 of the step 104 will be described with reference to FIG.

[0029] The lift-up detection device 300 includes a detection rod 301, a distance measurement sensor 302, and a main body cover 303. The detection rod 301 follows the tread 202 of the step 104 and moves up and down in accordance with the lift-up state of the tread 202 of the step 104. The distance measurement sensor 302 detects the gap between the steps 104 (between the steps 104).

[0030] The main body cover 303 houses a control unit 560 (described later) that controls a displacement sensor 510, a camera 520, and the distance measurement sensor 302 (described later). The detection rod 301 and the main body cover 303 are fixed to the main body 304. The main body 304 is prepared according to the specifications of the escalator 100, and a main body 304 suitable for the escalator 100 may be used. Additionally, the main body 304 may have an adjustment mechanism that can adjust at least one of the installation position and the installation angle of the distance measurement sensor 302. The displacement sensor 510 is an example of a means for detecting the amount of lift of the tread 202 of the step 104. The camera 520 is an example of a means for capturing the state during measurement (the movement of the detection rod 301, the installation state of the device, etc.).

[0031] Next, a detection mechanism by which the lift-up detection device 300 detects the amount of displacement of the tread 202 of the step 104 will be described with reference to FIG.

[0032] The detection rod 301 is fixed to the tip of a movable arm 401 that is fixed to the main body 304. The detection rod 301 is configured to move up and down around an axis 402 of the main body 304 in accordance with the state of the tread 202 of the step 104. A sensor light receiving plate 403 is provided on the movable arm 401. The sensor light receiving plate 403 moves up and down in the same way as the detection rod 301. The mechanism detects the amount of displacement of the tread 202 of the step 104 by irradiating the sensor light receiving plate 403 with a laser 410 output from a displacement sensor 510 (described below), which is a means for detecting the amount of displacement of the tread 202 of the step 104.

[0033] Next, the system configuration of the floating detection device 300 will be described with reference to FIG.

[0034] The lift-up detection device 300 includes a distance measurement sensor 302 that detects the gap between steps 104, a displacement sensor 510 that detects the detection rod 301, a camera 520 that captures the state during measurement (such as the movement of the detection rod 301 and the installation state of the device), a signal data processing unit 530, an A / D conversion unit 540, a power supply unit 550, and a control unit 560. The signal data processing unit 530 amplifies and filters the signals detected by the displacement sensor 510, camera 520, and distance measurement sensor 302, and the A / D conversion unit 540 performs A / D conversion. The converted signal data is output to the control unit 560, which then transmits the signal data to an information processing device 570 such as a PC, which then calculates the amount of lift of the tread 202 of the step 104. The power supply unit 550 supplies power to the lift-up detection device 300.

[0035] More specifically, the control unit 560 includes an arithmetic processing unit 561, a data storage unit 562, and an external communication unit 563. The arithmetic processing unit 561 is a processor such as a CPU, and performs arithmetic processing. The data storage unit 562 is a storage device such as an SD card, and stores signal data acquired from various sensors, measurement programs, etc. The external communication unit 563 connects to the information processing device 570 via WiFi or the like, and transmits and receives data.

[0036] Additionally, the functions of the uplift detection device 300 may be realized, for example, by a processor reading a program stored in an auxiliary storage device into a main storage device and executing it (software), or by hardware such as a dedicated circuit, or by a combination of software and hardware. One function of the uplift detection device 300 may be divided into multiple functions, or multiple functions may be combined into one function. Some of the functions of the uplift detection device 300 may be provided as separate functions or may be included in other functions. The uplift detection device 300 may also be realized by including the information processing device 570 or functions of the information processing device 570 (for example, a function related to calculating the amount of uplift).

[0037] Next, the installation state of the lift-up detection device 300 on the escalator 100 will be described with reference to FIGS. 6 and 7. FIG.

[0038] The escalator system 600 includes the escalator 100, the lift-up detection device 300, and the information processing device 570.

[0039] In the escalator system 600, for example, the main body 304 of the lift-up detection device 300 is fixed to the comb plate 601 of the upper landing with a fixing member. The fixing member may be a magnet, double-sided tape, or the like. In this case, the lift-up detection device 300 is installed so that the detection rod 301 comes into contact with the tread 202 of the step 104.

[0040] The distance measuring sensor 302 is provided with an adjustment mechanism (e.g., main body 304) that enables it to be installed between the detection rod 301 and the comb plate 602 provided on the comb plate 601 at any site. According to the adjustment mechanism, the lift-up detection device 300 is installed so that the distance measuring sensor 302 is positioned between the detection rod 301 and the comb plate 602 provided on the comb plate 601. This enables the distance measuring sensor 302 to detect the gap between the steps 104.

[0041] In this state, the worker operates the escalator 100, and the lift-up detection device 300 detects the amount of displacement of the tread 202 of the step 104.

[0042] Next, a means for dividing step 104 into individual sheets based on various signals acquired (measured) by the floating detection device 300 will be described with reference to FIG.

[0043] 8 shows an example (graph) of signal data 800 from the displacement sensor 510 and the distance measurement sensor 302. The upper side shows signal data 810 (lift amount of the tread 202) from the displacement sensor 510, and the lower side shows signal data 820 (distance) from the distance measurement sensor 302.

[0044] When an operator operates the escalator 100, the first step 104 moves, and when the next second step 104 moves in, a gap appears between the first step 104 and the second step 104. For this reason, the signal data 820 of the distance measurement sensor 302 has a constant value of signal data 821 while the tread 202 of the step 104 is being measured, but when a gap appears between the steps 104, the signal data 820 drops (the distance becomes longer) as shown in step gap section 802.

[0045] This series of steps is repeated every time the step 104 moves, so the escalator system 600 detects the step gap section 802 from the signal data 820 of the distance measurement sensor 302, processes the signal data 810 from the displacement sensor 510 based on that signal data 820, detects the tread section 801, and calculates the amount of lift (e.g., the overall swell) of the tread 202 of the step 104 from there.

[0046] Next, the procedure for calculating the amount of lift of the tread 202 using the lift detection method will be described with reference to FIG.

[0047] First, the worker fixes the lift-up detection device 300 to the comb plate 601 with a fixing member. At this time, the worker installs the lift-up detection device 300 so that the detection rod 301 contacts the tread 202 of the step 104 (S901).

[0048] After completing the installation, the worker connects the uplift detection device 300 to a building power supply (not shown) or a battery (not shown) and turns on the power using a power switch (not shown). After that, the worker wirelessly connects the uplift detection device 300 to the information processing device 570 and inputs necessary information such as the site specifications via the information processing device 570 (S902).

[0049] The worker inputs the necessary information, and when preparation is complete, sends a command to start measurement to the lift-up detection device 300 via the information processing device 570, and then operates the escalator 100 (S903).

[0050] After the escalator 100 has made at least one revolution (minimum one revolution), the worker stops the escalator 100 and ends the measurement by sending a command to end the measurement to the lift-up detection device 300 via the information processing device 570. After the measurement is completed, data is transmitted from the lift-up detection device 300 to the information processing device 570 (S904).

[0051] The information processing device 570 detects a step gap section 802 from the signal data 820 measured by the distance measurement sensor 302. At this time, since it is possible that the signal data may change at a location other than the gap of the step 104, the information processing device 570 detects a section of the signal data 820 in which the constant value of the signal data 821 has changed by a predetermined value (for example, twice) or more as the step gap section 802 (S905).

[0052] Since the dimensions of the steps 104 and the speed of the escalator 100 are constant, the number of data points in the step gap section 802 is constant, and therefore, data may be supplemented for sections in the step gap section 802 where there are gaps (S906 to S909).

[0053] The information processing device 570 determines whether or not there is a problem with the step gap section 802 (S906). If the information processing device 570 determines that there is no problem with the step gap section 802, it outputs information indicating that there is no problem (S907). On the other hand, if the information processing device 570 determines that there is a problem with the step gap section 802, it outputs information indicating that there is a problem (S908) and complements the step gap section 802 (S909). For example, the information processing device 570 complements the step gap section 802 based on the speed of the escalator 100 and the depth of the tread 202 of the step 104.

[0054] The information processing device 570 separates the steps 104 into individual steps 104 from the signal data 810 of the displacement sensor 510 based on the step section 801, and calculates the amount of lift of the step 202 from the separated data (S910).

[0055] At this time, the information processing device 570 aligns the signal data 810 of the displacement sensor 510 with the signal data 820 of the distance measurement sensor 302. For example, the information processing device 570 identifies at least one of the peaks of the signal data 820 that appeared at the start of the constant-speed operation in step 104 and the peak of the signal data 820 that appeared immediately before the end of measurement. The information processing device 570 identifies a displacement point (a point where the direction changes from upward to downward, in other words, a point that protrudes upward) from several pieces of signal data 810 before and after the time when the identified peak was detected, and aligns the data position of the identified displacement point with the peak.

[0056] The information processing device 570 may align the data in advance based on the traveling speed in step 104, the distance between the displacement sensor 510 and the distance measuring sensor 302, and the response speed of the displacement sensor 510 and the response speed of the distance measuring sensor 302. Additionally, the data alignment may be performed through the operation of the information processing device 570 by an operator.

[0057] The information processing device 570 detects the tread section 801 based on the peak data, median data, etc. of the step gap section 802 from the signal data 810 and signal data 820 whose data positions have been aligned. The information processing device 570 calculates the amount of lift of the tread 202 for each step 104 from the correspondence between the tread section 801 and the amount of displacement.

[0058] The information processing device 570 displays the determination result based on the calculation result (S911 to S914). For example, the information processing device 570 determines whether or not there is step 104 (abnormality) in which the floating amount exceeds a specified value, and generates the determination result.

[0059] The information processing device 570 determines whether the judgment result is OK or NG (S911). If the information processing device 570 determines that the judgment result is OK, it outputs information indicating that there is no problem to the information processing device 570, and if there is no problem in the judgment result, the worker does not need to check it and ends the work (S912).

[0060] If the information processing device 570 determines that the judgment result is NG, it outputs information indicating that there is a problem. If the judgment result is problematic, the worker checks the lifting state of the tread 202 of the step 104 that was judged to be NG (S913), and replaces the step 104 as necessary (S914).

[0061] In this embodiment, the escalator 100 has been described, but the amount of lift of the tread 202 of the step 104 may also be inspected for an auto-line (including diagonal movement) installed in an airport or the like.

[0062] Furthermore, although the lift-up detection device 300 is installed on the comb plate 601, it may also be installed at the lower landing.

[0063] Furthermore, an ultrasonic sensor may be used for the distance measurement sensor 302, which is a means for detecting gaps between steps 104 and separating the steps 104 into individual pieces. When an ultrasonic sensor is used, it is more susceptible to external disturbances than the distance measurement sensor 302, and depending on the installation angle, it may be difficult to detect gaps between steps 104, so care must be taken when installing it. However, an ultrasonic sensor can stably detect gaps between steps 104 without being affected by dust, steam, dirt on the object, the color of the object, etc.

[0064] Furthermore, the distance measurement sensor 302 is not limited to being provided on the side surface of the body cover 303. For example, the distance measurement sensor 302 may be provided on the bottom surface of the body cover 303.

[0065] (II) Supplementary Note The above-described embodiment includes, for example, the following contents.

[0066] In the above embodiment, the present invention is described as being applied to an escalator, but the present invention is not limited to this and can be widely applied to various other systems, devices, methods, and programs.

[0067] In the above-described embodiments, part or all of the programs may be installed from a program source into a device such as a computer that realizes the lift-up detection device. The program source may be, for example, a program distribution server connected via a network or a computer-readable recording medium (e.g., a non-transitory recording medium). In the above description, two or more programs may be realized as one program, or one program may be realized as two or more programs.

[0068] In the above-described embodiment, the output of information is not limited to display on a display screen, but may be audio output from a speaker, output to a file, printed on paper or the like by a printer, projected onto a screen or the like by a projector, or in other forms.

[0069] In addition, in the above description, information such as programs, tables, files, etc. that realize each function can be stored in a storage device such as a memory, a hard disk, or an SSD (Solid State Drive), or in a recording medium such as an IC card, an SD card, or a DVD.

[0070] The above-described embodiment has the following characteristic configurations, for example.

[0071] (1) In a passenger conveyor (e.g., escalator 100) having a plurality of steps (e.g., step 104) connected in an endless manner that moves in a circular manner, a lift-up detection device (e.g., lift-up detection device 300) that detects the lift-up of the tread of the step (e.g., tread 202) comprises a contact member (e.g., detection rod 301) that contacts the tread of the step, a displacement sensor (e.g., displacement sensor 510) that detects the displacement of the contact member, and a ranging sensor (distance sensor 302, ToF sensor, millimeter wave sensor, radar, ultrasonic sensor, etc.) that detects the gap between the steps.

[0072] According to the above configuration, the gaps between the steps are detected using a distance measuring sensor, so that each step can be identified without being affected by the site environment, for example.

[0073] (2) The distance measuring sensor is arranged to detect the gap between the steps between a comb plate (e.g., comb plate 602) provided on a comb plate (e.g., comb plate 601) at the landing of the passenger conveyor and the contact member.

[0074] According to the above configuration, for example, gaps between steps can be detected at positions where the steps are moving in parallel, so that each step can be identified with high accuracy.

[0075] (3) The lift-up detection device is equipped with a data processing unit (information processing device 570, control unit 560, calculation processing unit 561, circuit, etc.) that inputs distance data indicating the distance from the distance measurement sensor detected by the distance measurement sensor, identifies data indicating that the input distance data is greater than a predetermined value, and identifies the tread of the step based on the identified data.

[0076] According to the above configuration, the distance from the ranging sensor is calculated based on the reflected waves of the electromagnetic waves or ultrasonic waves emitted by the ranging sensor, so that each step can be easily identified, for example, by regarding any portion with a distance greater than a predetermined value as a gap.

[0077] (4) The data processing unit receives as input displacement data (e.g., signal data 810) indicating the displacement of the step tread detected by the displacement sensor and distance data (e.g., signal data 820) indicating the distance from the distance measuring sensor detected by the distance measuring sensor, aligns the data positions of the displacement point of the displacement data and the peak of the distance data, and calculates the amount of lift of the step tread based on the displacement data for each step tread (see, for example, S910).

[0078] (5) The lifting detection device includes an adjustment mechanism (e.g., main body 304) that can adjust at least one of the installation position and installation angle of the distance measurement sensor. Note that the lifting detection device 300 may also include an adjustment mechanism (slide mechanism, movable arm, etc.) that can move the distance measurement sensor 302 in at least one of the forward / backward direction (the running direction of the step 104), the left / right direction (the width direction of the step 104, the longitudinal direction of the detection rod 301), and the up / down direction.

[0079] According to the above-described adjustment mechanism, for example, the lift-up detection device can be easily installed on passenger conveyors of various specifications.

[0080] Furthermore, the above-described configurations may be modified, rearranged, combined, or omitted as appropriate within the scope of the present invention.

[0081] It should be understood that items included in a list in the format "at least one of A, B, and C" can mean (A), (B), (C), (A and B), (A and C), (B and C), or (A, B, and C). Similarly, items listed in the format "at least one of A, B, or C" can mean (A), (B), (C), (A and B), (A and C), (B and C), or (A, B, and C). [Explanation of symbols]

[0082] 300...floating detection device, 302...distance measurement sensor, 510...displacement sensor.

Claims

1. 1. A passenger conveyor having a plurality of steps connected in an endless manner that moves in a circular motion, comprising: a lift-up detection device that detects lift-up of a tread of the step; a contact member that contacts the tread of the step; a displacement sensor that detects a displacement of the contact member; a distance measuring sensor for detecting the gap between the steps; a data processing unit that receives distance data indicating a distance from the distance measuring sensor detected by the distance measuring sensor, identifies data indicating that the received distance data is equal to or greater than a predetermined value, and identifies the tread of the step based on the identified data; Equipped with the distance measuring sensor is provided to detect the gap between the steps between a comb plate provided on a landing of the passenger conveyor and the contact member, The data processing unit receives displacement data indicating the displacement of the step tread detected by the displacement sensor and distance data indicating the distance from the distance measuring sensor detected by the distance measuring sensor, aligns the data positions of the displacement points of the displacement data and the peaks of the distance data, and calculates the amount of lift of the step tread based on the displacement data for each step tread. Floating detection device.

2. an adjustment mechanism capable of adjusting at least one of an installation position of the distance measuring sensor and an installation angle of the distance measuring sensor; The lift-up detection device according to claim 1 .

3. A passenger conveyor system comprising: a passenger conveyor having a plurality of steps connected in an endless manner and circulating; and a lift-up detection device for detecting lift-up of treads of the steps, a contact member that contacts the tread of the step; a displacement sensor that detects a displacement of the contact member; a distance measuring sensor for detecting the gap between the steps; a data processing unit that receives distance data indicating a distance from the distance measuring sensor detected by the distance measuring sensor, identifies data indicating that the received distance data is equal to or greater than a predetermined value, and identifies the tread of the step based on the identified data; Equipped with the distance measuring sensor is provided to detect the gap between the steps between a comb plate provided on a landing of the passenger conveyor and the contact member, The data processing unit receives displacement data indicating the displacement of the step tread detected by the displacement sensor and distance data indicating the distance from the distance measuring sensor detected by the distance measuring sensor, aligns the data positions of the displacement points of the displacement data and the peaks of the distance data, and calculates the amount of lift of the step tread based on the displacement data for each step tread. Passenger conveyor system.

4. 1. A method for detecting lifting of a step tread in a passenger conveyor having a plurality of steps connected in an endless manner and moving in a circular manner, comprising: a displacement sensor detecting a displacement of a contact member that contacts a tread of the step; a distance measurement sensor detecting a gap between the steps; a data processing unit inputs distance data indicating the distance from the distance measuring sensor detected by the distance measuring sensor, identifies data indicating that the input distance data is equal to or greater than a predetermined value, and identifies the tread of the step based on the identified data; Including, the distance measuring sensor is provided to detect the gap between the steps between a comb plate provided on a landing of the passenger conveyor and the contact member, The data processing unit receives displacement data indicating the displacement of the step tread detected by the displacement sensor and distance data indicating the distance from the distance measuring sensor detected by the distance measuring sensor, aligns the data positions of the displacement points of the displacement data and the peaks of the distance data, and calculates the amount of lift of the step tread based on the displacement data for each step tread. Floating detection method.

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