Stair missing monitoring control device for escalator or moving sidewalk

Abstract

The utility model provides a step missing monitoring control device for an escalator or a moving sidewalk. The step missing monitoring control device comprises an inductance type detection switch and a step missing detection control circuit, the inductance type detection switch is mounted on a step return side of the escalator or the moving sidewalk and is used for detecting whether a step or a pedal made of a metal material is in a missing state or not on the escalator or the moving sidewalk; the inductance type detection switch is electrically connected with an escalator or sidewalk control system through the step missing detection control circuit; the metal stairs or pedals are continuously sensed through the inductance type detection switch, and when the signal missing time of the inductance type detection switch exceeds the set interval time, the escalator or sidewalk control system cuts off a safety circuit of the escalator control system, brakes and stops the escalator. And the device can be additionally arranged in any type of escalator (sidewalk) control system. And the device is particularly suitable for safe upgrading and reconstruction of old escalators (sidewalks).

Description

Technical Field

[0001] The utility model relates to the technical field of automatic escalators or moving walkways, in particular to a step-missing monitoring and control device for automatic escalators or moving walkways. Background Art

[0002] During maintenance, escalators and moving walkways require the removal of some steps (or treads) for inspection and various maintenance tasks, such as debugging, repair, and part replacement. After the maintenance is complete, there is a safety risk: maintenance personnel may forget to reinstall all removed steps (or treads) before resuming operation. Passengers who enter an escalator or moving walkway with a missing step (or tread) could fall into the escalator, potentially resulting in a fatal accident. Alternatively, during operation, steps (or treads) may become detached due to unexpected mechanical failures, creating a potential falling space. Passengers who enter an escalator or moving walkway with a missing step (or tread) could potentially fall into the escalator, potentially resulting in a fatal accident. The present invention proposes the installation of a missing step (or tread) monitoring device. Upon detecting a missing step (or tread), the escalator or moving walkway immediately stops operation and can only restart after the missing step (or tread) is replaced. Utility Model Content

[0003] This utility model aims to provide a step-missing monitoring and control device for escalators or moving walkways. When a missing step (or pallet) is detected, the escalator (or moving walkway) immediately stops and does not restart until the missing step (or pallet) is replaced. This independent monitoring and control device can be retrofitted into any escalator (or moving walkway) control system. It is particularly suitable for safety upgrades and retrofits of older escalators (or moving walkways).

[0004] To achieve the above-mentioned object, the present invention is implemented through the following technical solution: a step-missing monitoring and control device for an escalator or moving walkway, comprising an inductive detection switch and a step-missing detection control circuit; the inductive detection switch is installed on the step return side of the escalator or moving walkway and is used to detect whether a metal step or pedal is missing on the escalator or moving walkway; the inductive detection switch is electrically connected to the escalator or moving walkway control system through the step-missing detection control circuit; the inductive detection switch continuously senses the metal step or pedal, and when the missing signal time of the inductive detection switch exceeds a set interval time, the escalator or moving walkway control system disconnects the safety circuit of the escalator control system and brakes to stop the escalator.

[0005] As a further improvement of the technical solution of the present invention, the inductive detection switch includes an upper platform step missing detection switch and a lower platform step missing detection switch; the upper platform step missing detection switch is installed below the upper platform plate; the lower platform step missing detection switch is installed below the lower platform plate.

[0006] As a further improvement to the technical solution of the present invention, the step missing detection control circuit includes an upper platform step missing intermediate relay, a lower platform step missing intermediate relay, an upper platform step missing detection time relay, a lower platform step missing detection time relay and a start time relay; the upper platform step missing detection switch is electrically connected to the upper platform step missing intermediate relay through the upper platform step missing detection switch output line; the lower platform step missing detection switch is electrically connected to the lower platform step missing intermediate relay through the lower platform step missing detection switch output line; the upper platform step missing intermediate relay is electrically connected to the upper platform step missing detection time relay; the lower platform step missing intermediate relay is electrically connected to the lower platform step missing detection time relay; the start time relay is electrically connected to the upper platform step missing detection time relay and the lower platform step missing detection time relay respectively.

[0007] As a further improvement to the technical solution of the present invention, the step-missing detection control circuit also includes a step-missing self-locking circuit reset button; the step-missing self-locking circuit reset button is electrically connected to the escalator or walkway control system.

[0008] As a further improvement to the technical solution of the present utility model, the step-missing detection control circuit further includes a step-missing detection auxiliary time relay; the step-missing detection auxiliary time relay is electrically connected to the starting time relay.

[0009] As a further improvement to the technical solution of the present invention, the escalator or walkway control system includes a control cabinet; an emergency stop button is provided on the control cabinet; the emergency stop button is connected in series with the upper platform step missing detection switch and the lower platform step missing detection switch respectively.

[0010] As a further improvement to the technical solution of the present invention, a green reset button and a red indicator light are further provided on the control cabinet; the green reset button and the red indicator light are electrically connected to the step missing detection control circuit respectively.

[0011] Beneficial effects of the utility model:

[0012] This utility model uses an inductive detection switch to detect whether a metal step or pedal is missing from an escalator (moving walkway). Using a missing step detection control circuit, the escalator (moving walkway) is stopped if a missing step (pedal) is detected. When a missing step (pedal) is detected, the escalator (moving walkway) immediately stops and can only restart after the missing step (pedal) is replaced. This utility model is an independent monitoring and control device that can be installed in any escalator (moving walkway) control system. It is particularly suitable for safety upgrades and renovations of old escalators (moving walkways). BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments with reference to the following drawings:

[0014] Figure 1 This is a step-missing detection control circuit diagram of a step-missing monitoring control device for an escalator or moving walkway according to an embodiment of the present invention;

[0015] Figure 2 This is a circuit diagram of a safety circuit of an escalator control cabinet of an escalator or moving walkway step-missing monitoring and control device according to an embodiment of the present invention;

[0016] Figure 3 This is a schematic diagram of the installation position of the inductive detection switch according to an embodiment of the present utility model;

[0017] Figure 4 This is a schematic diagram of an escalator or sidewalk with missing steps (pedals). DETAILED DESCRIPTION

[0018] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The exemplary embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0019] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, upper end, lower end, top, bottom...) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0020] In this utility model, unless otherwise specified or limited, the term "connection" should be understood in a broad sense. For example, "connection" can mean fixed connection, detachable connection, or integration; it can mean mechanical connection or electrical connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0021] In addition, the terms "first," "second," and so on, used in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include at least one such feature. Furthermore, the technical solutions of various embodiments may be combined with each other, but only on the basis that they can be implemented by a person of ordinary skill in the art. If the combination of technical solutions contradicts or cannot be implemented, it shall be deemed that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] The following is combined with Figure 1-4 The utility model is described in further detail.

[0023] When passengers step into the escalator from the entrance and exit platform, there is a risk of falling into the escalator if there is a missing step (pedal) on the escalator or sidewalk. Figure 4 As shown;

[0024] See also Figures 1 to 3The utility model provides a technical solution: a step-missing monitoring and control device for an escalator or moving walkway, comprising an inductive detection switch and a step-missing detection control circuit; the inductive detection switch is installed on the step return side of the escalator or moving walkway, and is used to detect whether a metal step or pedal is missing on the escalator or moving walkway; the inductive detection switch is electrically connected to an escalator or moving walkway control system via the step-missing detection control circuit; the inductive detection switch continuously senses the presence of metal steps or pedals, and when the missing signal time of the inductive detection switch exceeds a set interval time, the escalator or moving walkway control system cuts off the safety circuit of the escalator control system and brakes to stop the escalator. This utility model uses an inductive detection switch to detect whether a metal step or pedal is missing from an escalator (moving walkway). Using a missing step detection control circuit, the escalator (moving walkway) is stopped if a missing step (pedal) is detected. When a missing step (pedal) is detected, the escalator (moving walkway) immediately stops and can only restart after the missing step (pedal) is replaced. This utility model is an independent monitoring and control device that can be installed in any escalator (moving walkway) control system. It is particularly suitable for safety upgrades and renovations of old escalators (moving walkways).

[0025] Specifically, in this embodiment, the inductive detection switch includes an upper platform step missing detection switch and a lower platform step missing detection switch; the upper platform step missing detection switch is installed below the upper platform plate; the lower platform step missing detection switch is installed below the lower platform plate. It should be noted that the inductive detection switches are installed on the return side of the steps (pedals) of the escalator (walkway), with one installed near the upper arc section and the other installed near the lower arc section. The specific installation position of the inductive detection switch must be selected appropriately. When a missing step is detected on the return side, the safety circuit is immediately triggered to stop the escalator. After the escalator brakes and slides for a distance, the gap of the empty step cannot be exposed at the passenger side entry position, effectively preventing passengers from stepping into the escalator (walkway) with missing steps (pedals), avoiding passengers falling into the escalator and causing life-threatening accidents.

[0026] Reference Figure 1Specifically, in this embodiment, the step missing detection control circuit includes an upper platform step missing intermediate relay, a lower platform step missing intermediate relay, an upper platform step missing detection time relay, a lower platform step missing detection time relay and a start time relay; the upper platform step missing detection switch is electrically connected to the upper platform step missing intermediate relay through the upper platform step missing detection switch output line; the lower platform step missing detection switch is electrically connected to the lower platform step missing intermediate relay through the lower platform step missing detection switch output line; the upper platform step missing intermediate relay is electrically connected to the upper platform step missing detection time relay; the lower platform step missing intermediate relay is electrically connected to the lower platform step missing detection time relay; the start time relay is electrically connected to the upper platform step missing detection time relay and the lower platform step missing detection time relay respectively.

[0027] It should be noted that the upper platform step missing detection switch and the lower platform step missing detection switch both continuously sense metal steps (pedals). When a missing metal step (pedal) is detected, the upper platform step missing detection switch or the lower platform step missing detection switch sends a missing step (pedal) signal to the upper platform step missing intermediate relay or the lower platform step missing intermediate relay. After receiving the missing signal, the upper platform step missing intermediate relay and the lower platform step missing intermediate relay disconnect their respective circuits. When the missing signal duration exceeds the set interval, that is, when the upper platform step missing detection time relay and the lower platform step missing detection time relay detect that the missing signal duration exceeds the set interval, the escalator or sidewalk control system immediately disconnects the safety circuit of the escalator control system and brakes to stop the escalator. Reset and restart operation can only be performed after the fault is eliminated. It should be noted that the start time relay is set to enable the escalator to start running before reaching its speed, open its two contacts, and delay the detection function of the inductive detection switch for about 3-5 seconds to avoid the escalator or walkway from accidentally triggering a stop. Therefore, the start time relay is powered only after the escalator or walkway control system sends a suitable operating signal.

[0028] Specifically, in this embodiment, the missing step detection control circuit further includes a missing step self-locking circuit reset button; the missing step self-locking circuit reset button is electrically connected to the escalator or walkway control system. It should be noted that only after the escalator or walkway fault has been resolved can the missing step self-locking circuit reset button be pressed to reset and restart the escalator or walkway, allowing normal operation of the escalator or walkway.

[0029] Specifically, in this embodiment, the step-lack detection control circuit further includes a step-lack detection auxiliary time relay; the step-lack detection auxiliary time relay is electrically connected to the start time relay. Figure 1 The names of the missing step system components are shown in the following table:

[0030] RT Missing step self-locking circuit reset button UMS Upper platform missing step detection switch UMSR The upper platform is missing the intermediate relay LMS Upper platform missing step detection switch LMSR The lower platform is missing the intermediate relay XUD Missing step detection auxiliary time relay UMST Upper platform step missing detection time relay LMST Lower platform step missing detection time relay STAU Start time relay

[0031] Figure 1 The terminal blocks are shown in the following table:

[0032] P1 FireWire L P2 Neutral line N P3 Ground wire E 1 DC24V- 2 DC24V+ 3 Upper platform step missing detection switch output line (black) 4 Lower platform step missing detection switch output line (black) 5 Connect in series with the emergency stop button on the control cabinet 6 Connect in series with the emergency stop button on the control cabinet 7 Connect in series with the green reset button on the control box 8 Connect in series with the green reset button on the control box 9 Connect in series with the red indicator light of the control box 10 Connect in series with the red indicator light of the control box

[0033] Specifically, in this embodiment, the escalator or walkway control system includes a control cabinet equipped with an emergency stop button, which is connected in series with the upper platform step-missing detection switch and the lower platform step-missing detection switch, respectively. It should be noted that the provision of the emergency stop button allows the escalator or walkway control system to apply emergency braking to the escalator or walkway in an emergency or impending accident, thereby preventing various accidents or incidents.

[0034] Specifically, in this embodiment, the control cabinet is also provided with a green reset button and a red indicator light; the green reset button and the red indicator light are respectively electrically connected to the missing step detection control circuit. It should be noted that the provision of the green reset button enables automatic resetting of the escalator or walkway control system, while the provision of the red indicator light facilitates staff in observing whether the escalator or walkway control system is in normal working condition, facilitating timely feedback and troubleshooting, thereby improving maintenance efficiency.

[0035] The above is a detailed introduction to the technical solutions provided by the embodiments of the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A step-missing monitoring and control device for an escalator or moving walkway, characterized by: The system comprises an inductive detection switch and a missing step detection control circuit; the inductive detection switch is installed on the step return side of an escalator or moving walkway and is used to detect whether a metal step or pedal is missing on the escalator or moving walkway; the inductive detection switch is electrically connected to the escalator or moving walkway control system via the missing step detection control circuit; the inductive detection switch continuously senses the presence of metal steps or pedals, and when the missing signal duration of the inductive detection switch exceeds a set interval, the escalator or moving walkway control system disconnects the escalator control system's safety circuit and brakes the escalator.

2. The escalator or moving walkway step missing monitoring and control device according to claim 1, characterized in that: The inductive detection switch includes an upper platform step missing detection switch and a lower platform step missing detection switch; the upper platform step missing detection switch is installed below the upper platform plate; the lower platform step missing detection switch is installed below the lower platform plate.

3. The escalator or moving walkway step missing monitoring and control device according to claim 2, characterized in that: The step missing detection control circuit includes an upper platform step missing intermediate relay, a lower platform step missing intermediate relay, an upper platform step missing detection time relay, a lower platform step missing detection time relay and a start time relay; the upper platform step missing detection switch is electrically connected to the upper platform step missing intermediate relay through the upper platform step missing detection switch output line; the lower platform step missing detection switch is electrically connected to the lower platform step missing intermediate relay through the lower platform step missing detection switch output line; the upper platform step missing intermediate relay is electrically connected to the upper platform step missing detection time relay; the lower platform step missing intermediate relay is electrically connected to the lower platform step missing detection time relay; the start time relay is electrically connected to the upper platform step missing detection time relay and the lower platform step missing detection time relay respectively.

4. The escalator or moving walkway step missing monitoring and control device according to claim 3, characterized in that: The step-missing detection control circuit further includes a step-missing self-locking circuit reset button; the step-missing self-locking circuit reset button is electrically connected to the escalator or walkway control system.

5. The escalator or moving walkway step missing monitoring and control device according to claim 3, characterized in that: The step-lack detection control circuit further includes a step-lack detection auxiliary time relay; the step-lack detection auxiliary time relay is electrically connected to the start time relay.

6. The step-missing monitoring and control device for an escalator or moving walkway according to claim 2, characterized in that: The escalator or walkway control system includes a control cabinet; an emergency stop button is provided on the control cabinet; the emergency stop button is connected in series with the upper platform step missing detection switch and the lower platform step missing detection switch respectively.

7. The escalator or moving walkway step-missing monitoring and control device according to claim 6, characterized in that: The control cabinet is also provided with a green reset button and a red indicator light; the green reset button and the red indicator light are electrically connected to the step-missing detection control circuit respectively.

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