JP2019085184A - Passenger conveyor - Google Patents

Abstract

To provide a passenger conveyor having a safety circuit including a battery-free transmitting unit.SOLUTION: A passenger conveyor has a monitoring unit 111 to monitor the operation of a safety device 90, a control unit 50 to stop the passenger conveyor when the monitoring unit 111 determines that the safety device 90 operates, a power supply 80 to operate the plural safety devices 90 and the monitoring unit 111, a transmitting unit 124 installed in the safety device 90, to transmit an identification signal representing the identifier of the concerned safety device 90 and an abnormal signal when the concerned safety device 90 operates, and a receiving unit 74 to receive the identification signal and the abnormal signal and to determine the identifier of the abnormal safety device 90 from the identification signal.SELECTED DRAWING: Figure 3

Description

   Embodiments of the present invention relate to a passenger conveyor.

   The passenger conveyor is provided with a number of safety devices for passenger protection and equipment failure detection. The operation of the passenger conveyor is possible only when all these safety devices are normal. If any safety device detects an abnormality during operation of the passenger conveyor, the operation is immediately stopped. In the circuit that realizes this, the b-contact type switches possessed by each safety device are connected in series, the monitoring unit is provided at the end, and the power supply to the monitoring unit is cut off by operating any safety device. Stop the operation.

   Here, when the safety device operates, in order to determine which safety device has stopped the operation, a signal line is drawn from between the b-contact type switches of each safety device and connected to the failure determination device. However, in this configuration, it is necessary to directly connect each safety device and the failure determination device by a cable, and a large amount of wiring work occurs in the passenger conveyor. In particular, some of the existing old-type passenger conveyors do not have the failure determination device itself, and the number of man-hours when adding the failure determination device for modernization repair etc. is enormous.

   Therefore, in order to reduce the number of cable laying steps and the cable material as described above, a configuration has been proposed in which each safety device and the failure determination device are connected by a wireless signal.

Patent No. 3990482

   However, in the above-described wireless type configuration, it is necessary to provide a battery as a power source inside each safety device, and there is a problem that the passenger conveyor can not be operated when the battery is completely charged.

   Therefore, in view of the above problems, the embodiments of the present invention aim to provide a passenger conveyor having a safety circuit including a unnecessary transmission unit.

   In the embodiment of the present invention, the monitoring unit determines that the plurality of safety devices that operate when detecting an abnormality of the passenger conveyor, a monitoring unit that monitors the operation of the safety device, and the safety device operate. A control unit for stopping the passenger conveyor, a power supply device for operating the plurality of safety devices and the monitoring unit, and the safety device provided with the identifier of the safety device when the safety device operates A passenger conveyor comprising: a transmission unit for transmitting an identification signal and an abnormality signal, and a reception unit for receiving the identification signal and the abnormality signal and determining an identifier of the safety device having an abnormality from the identification signal is there.

Explanatory drawing of the escalator of this embodiment. Block diagram of the escalator. Schematic of the safety circuit of the escalator. The circuit diagram of a detection circuit. The circuit diagram of the conventional 1st safety circuit currently used for the old model escalator. The circuit diagram of the conventional 2nd safety circuit currently used for the old model escalator. Operation start flowchart of the escalator in stop. Operation stop flow chart of the escalator in operation. The circuit diagram of the detection circuit of the example of a change.

   Hereinafter, an escalator 10 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 8.

(1) Escalator 10
The structure of the escalator 10 will be described with reference to FIG. FIG. 1 is an explanatory view of the escalator 10 as viewed from the side.

   A truss 12 which is a framework of the escalator 10 is supported by supporting angles 2 and 3 straddling upper and lower floors of the building 1. The truss 12 is formed of a housing composed of a plurality of metal frame members, and the housing is electrically grounded (hereinafter, this is referred to as a “ground housing 112”).

   Inside the machine room 14 on the upper floor side at the upper end of the truss 12, a drive 18 for moving the step 30, a pair of left and right drive sprockets 24, 24, and a pair of left and right belt sprockets 27, 27 are provided. The drive device 18 includes a motor 20 including an induction motor (induction motor), a reduction gear, an output sprocket attached to an output shaft of the reduction gear, a drive chain 22 driven by the output sprocket, and rotation of the motor 20 And a disk brake for holding the stopped state. The drive sprocket 24 is rotated by the drive chain 22. The pair of left and right drive sprockets 24, 24 and the pair of left and right belt sprockets 27, 27 are connected by a connecting belt (not shown) and synchronously rotate. Further, inside the machine room 14 on the upper floor side, a control unit 50 that controls the motor 20, a disk brake, and the like is provided.

   A driven sprocket 26 is provided in the lower machine room 16 at the lower end of the truss 12. A pair of left and right endless step chains 28, 28 are stretched between the drive sprocket 24 on the upper floor side and the driven sprocket 26 on the lower floor side. That is, the wheels 301 of the plurality of steps 30 are attached at equal intervals to the pair of left and right step chains 28, 28. The wheel 301 of the step 30 travels along a guide rail (not shown) fixed to the truss 12 and engages with a recess in the outer periphery of the drive sprocket 24 and a recess in the outer periphery of the driven sprocket 26 to move up and down Reverse. Further, the wheels 302 travel on the guide rails 25 fixed to the truss 12.

   On the left and right sides of the truss 12, a pair of left and right skirt guards 44, 44 and a pair of left and right balustrades 36, 36 are provided upright. A handrail rail 39 is provided above the balustrade 36, and the handrail belt 38 moves along the handrail rail 39. A front skirt guard 40 on the upper floor is provided at the lower front of the upper floor of the balustrade 36, and a front skirt guard 42 on the lower floor is provided at the lower front on the lower floor. The inlets 46 and 48 which are the entrance and exit of the handrail belt 38 respectively project. The skirt guard 44 is provided at the lower part of the side of the balustrade 36, and the step 30 travels between the pair of left and right skirt guards 44, 44. Control panels 52 and 56 and speakers 54 and 58 are provided on the inner side surfaces of the skirt guards 44 on the upper and lower floors, respectively.

   The handrail belt 38 intrudes into the front skirt guard 40 from the inlet 46 on the upper floor side, is stretched around the belt sprocket 27 via the guide roller group 64, and then the skirt guard 44 via the guide roller group 66. It moves inside and appears from the inlet 48 on the lower floor side to the outside of the front skirt guard 42. The handrail belt 38 moves in synchronization with the step 30 as the belt sprocket 27 rotates with the drive sprocket 24. In addition, a pressing member 68 for pressing the handrail belt 38 traveling on the rotating belt sprocket 27 is provided.

   On the ceiling of the machine room 14 on the upper floor side, an entrance plate 32 on the upper floor side is horizontally provided at the entrance and exit of the machine room 16 on the lower floor side. A passenger board 34 is provided horizontally. A comb-like comb 60 is provided at the tip of the landing plate 32, and the step 30 advances or intrudes from the comb 60. Further, a comb-like comb 62 is also provided on the board 34.

   In addition, the escalator 10 is provided with a plurality of safety devices 90 for securing the safety of the passengers or detecting a failure of the device. These safety devices 90 will be described in the next section.

(2) Safety device 90
The safety device 90 will now be described with reference to FIGS. 1 and 2. As the safety device 90, as shown in FIG. 1, a skirt guard pinching detecting device provided on the skirt guard 44, an inlet pinching detecting device provided on the inlets 46 and 48, a step provided on the guide rail 25 There are a floating detection device, a step chain disconnection detection device, an emergency stop button provided on the operation panel 52, 56, and the like. The safety circuit 100 is configured of the detection circuits 120 of the plurality of safety devices 90.

   The skirt guard pinching detection device is a device that detects that a foreign object (for example, clothes or luggage) is caught between the skirt guard 44 and the steps 30. When the abnormality detection unit 92 that detects the pinching is operated, the b-contact type disconnecting switch 126 of the detection circuit 120 described later is turned off.

   The inlet pinching detection device detects when a foreign object (for example, a passenger's hand or a luggage) is drawn simultaneously with the handrail belt 38 to the inlet portion 46 or the inlet portion 48 to which the handrail belt 38 to be moved is drawn. It is an apparatus. When the abnormality detection unit 92 that detects that it has been pulled in operates, the b-contact type disconnection switch 126 of the detection circuit 120 is turned off.

   The step chain disconnection detection device connects the step 30 moving with the passengers, and detects that the step chain 28 transmitting power is disconnected. When the abnormality detection unit 92 that detects disconnection is operated, the b-contact type disconnection switch 126 of the detection circuit 120 is turned off.

   Also in the other safety device 90, the b-contact type disconnecting switch 126 of the detection circuit 120 is turned off when the abnormality detection unit 92 that detects an abnormality is detected.

(3) Electrical Configuration of Escalator 10 Next, the electrical configuration of the escalator 10 will be described with reference to the block diagram of FIG. The control unit 50 provided inside the machine room 14 includes a main control unit 70 made of a computer, a drive circuit 72 of the drive unit 18, a receiving unit 74 having an antenna 76, and a storage unit 78. , Speakers 54, 58, and a power supply 80 are connected. In addition, the safety circuit 100 is wirelessly connected via the receiving unit 74. Further, the control unit 50 also has a monitoring unit 111 which constitutes a safety circuit 100 which will be described later.

(4) Safety circuit 100
Next, the safety circuit 100 will be described with reference to FIGS. 3 and 4. The safety circuit 100 includes the detection circuit 120 and the monitoring unit 111 of each safety device 90 described above, and is connected to a direct current (for example, 24 V) power supply device 80.

   Each of the safety devices 90 described above has a detection circuit 120. As shown in FIGS. 3 and 4, DC power + V is supplied from the positive terminal of the power supply 80 to the input terminal 121 of the detection circuit 120a of the first safety device 90, and the output terminal 122 of the detection circuit 120a is It is connected to the input terminal 121 of the detection circuit 120 b of the second safety device 90. Subsequently, the same connection is continued between the detection circuit 120b and the detection circuit 120c and so on to form a series circuit, and an output terminal 122 of the detection circuit 120 at the end which is omitted in FIG. The next terminal is connected. The detection circuits 120a, 120b, 120c, and so on in FIG. 3 are referred to as the detection circuit 120 in FIGS.

   The secondary side terminal of the monitoring unit 111 is connected to the negative terminal of −V of the power supply device 80 and the ground casing 112. Further, the ground terminal 123 of each detection circuit 120 is similarly connected to the ground casing 112 in the vicinity of each detection circuit 120. The monitoring unit 111 has a relay switch that is turned on when the DC power supply is conductive. When the DC power supply is not conducted to the monitoring unit 111, the relay switch is turned off, and the monitoring unit 111 determines that an abnormality has occurred. When the relay switch is turned off, the control unit 50 detects this and stops the driving device 18 of the escalator 10.

   As described above, in the safety circuit 100, the detection circuits 120 and the monitoring unit 111 of all the safety devices 90 provided in the escalator 10 are connected in series with the power supply device 80 at the top.

(5) Detection circuit 120
Next, the detection circuit 120 will be described with reference to FIG. The detection circuit 120 includes three connection terminals of an input terminal 121, an output terminal 122, and a ground terminal 123, a b-contact type disconnect switch (b-contact type limit switch) 126, a transmitter 124, and a trigger circuit (b-contact type limit switch) 127 Have. A unique identifier is assigned to the detection circuit 120 of each safety device 90, and it is possible to determine which safety device 90 is based on this identifier. This identifier is stored in the transmission unit 124.

   The input terminal 121 and the output terminal 122 are connected via a b-contact type disconnecting switch 126 which is a detection switch. That is, the input terminal 121 is connected to the primary side terminal of the b-contact type disconnect switch 126, and the output terminal 122 is connected to the secondary side terminal of the b-contact type disconnect switch 126. The b-contact type disconnecting switch 126 is turned off (opened) when the abnormality detection unit 92 of the safety device 90 operates to detect a dangerous state of a passenger on the escalator 10 or when an abnormality of the device is detected. Become.

   The transmitting unit 124 includes an antenna 125 for performing wireless communication with the antenna 76 of the receiving unit 74 by radio waves. The transmission unit 124 is connected between the input terminal 121 and the ground terminal 123. That is, the transmission unit 124 receives power supply from the bus of the safety circuit 100 and the ground casing 112.

   The trigger circuit 127 is connected between the transmission unit 124 and the ground terminal 123. The trigger circuit 127 is a b-contact type switch (trigger switch) that operates in conjunction with the b-contact type disconnect switch 126. When the trigger circuit 127 is turned off in conjunction with the b-contact type disconnect switch 126, a trigger signal is output to the transmission unit 124, and when the trigger signal is input to the transmission unit 124, the safety device 90 is directed to the reception unit 74. An identification signal and an abnormal signal indicating that the operation has been performed, or an identification signal and a reply signal indicating that the communication is normal are transmitted. Here, the identification signal represents a unique identifier of the safety device 90 having the detection circuit 120, and the control unit 50 can determine which safety device 90 has operated by the identification signal. The identification signal and the abnormality signal, and the identification signal and the return signal may be an integral signal.

(6) Operating State of Safety Circuit 100 Next, the operation of the safety circuit 100 will be described with reference to FIGS. 3 and 4.

   When each detection circuit 120 is not in operation, that is, when the b-contact type disconnecting switch 126 is in the ON state, the DC power from the power supply 80 is conducted to the monitoring unit 111.

   The monitoring unit 111 is included in the control unit 50 and operates the escalator 10 only while the DC power supply is in conduction, and can not start the escalator 10 if there is no conduction, or stop the escalator 10 in operation. Have.

   For example, when the detection circuit 120c detects an abnormality during operation of the escalator 10, the internal b-contact type disconnecting switch 126 is turned off, and power is supplied to the detection circuit 120d and the monitoring unit 111 after the detection circuit 120c. Is cut off. Thereby, the monitoring unit 111 stops the escalator 10. At the same time, the trigger circuit 127 in the detection circuit 120 c outputs to the transmission unit 124 that the safety device 90 has been operated. The transmitting unit 124 transmits an identification signal and an abnormality signal of the safety device 90 toward the receiving unit 74 installed in the escalator 10 via the antenna 125. The receiving unit 74 in the control unit 50 determines which safety device 90 has failed from the identification signal, and stores it in the storage unit 78 as a failure history together with its identifier. Further, when the transmitting unit 124 receives the operation confirmation signal from the receiving unit 74 of the control unit 50, the transmitting unit 124 transmits an identification signal and a reply signal to the receiving unit 74.

   The safety circuit 100 performs the operation and the stop of the escalator 10 by the power supply continuity of the plurality of detection circuits 120 connected in series, and the determination of the failure location is performed only by the identification signal and the abnormal signal transmitted by wireless. In addition, since the trigger signal is output from the trigger circuit 127 only from the detection circuit 120 in which the b-contact type disconnect switch 126 is in the OFF state, the power supply from the power supply 80 to the other detection circuits 120 is Even if lost, the identification signal and the abnormal signal are not output.

(7) The first safety circuit 150 of the escalator 10 of the old model
A conventional first safety circuit 150 used in the escalator 10 of the old type will be described with reference to FIG. In FIG. 5, the detection circuits 130a, 130b, 130c,... Are referred to as “detection circuit 130” in the specification.

   The safety circuit 150 includes detection circuits 130 and monitoring units 111 of a plurality of safety devices 90. Each detection circuit 130 includes b contact type disconnect switches (b contact type limit switches), and all the contacts and the monitoring units 111 Connected in series. When any contact of the detection circuit 130 is turned off, the safety circuit 150 cuts off the power supply to the monitoring unit 111 and stops the escalator 10. However, this conventional safety circuit 150 can not determine which safety device 90 has operated.

(8) Second safety circuit 160 of escalator 10 of old model
A conventional second safety circuit 160 used in the escalator 10 of the old type will be described with reference to FIG. The second safety circuit 160 is the first safety circuit 150 to which a function of determining the operating point of the safety device 90 is added. In FIG. 6, the detection circuits 130a, 130b, 130c, and so on are described, but in the specification, they are described as the detection circuit 130.

   The second safety circuit 160 includes detection circuits 130 and a monitoring unit 111 of a plurality of safety devices 90. Each detection circuit 130 includes a b-contact type disconnect switch (b-contact type limit switch) and monitors all the contacts The units 111 are connected in series.

   The additional laying line 131 is connected to the secondary side terminal of the b-contact type disconnecting switch of each detection circuit 130, and the additional laying line 131 is connected to the failure determination device inside the control unit 50. The detection circuit 130 outputs an abnormal signal to the failure determination device. As a result, when any of the detection circuits 130 operates, it can be determined which of the detection circuits 130 has shut off the power, and the operated safety device 90 can be identified.

   However, since the safety devices 90 are scattered all over the truss 12 of the escalator 10, the wiring path of the additional laying line 131 is very long, and the number of operation steps is enormous.

(9) Remodeling Method of Old Model Escalator 10 Next, a method of converting the safety circuit 150 of the old model escalator 10 shown in FIG. 5 into the safety circuit 100 of the present embodiment shown in FIG. 3 will be described.

   In the safety circuit 150 of the old model and the safety circuit 100 of the present embodiment, the configuration in which the b-contact type disconnecting switches 126 of the respective safety devices 90 are connected in series is the same.

   Therefore, the series circuit is separated from the primary side terminal of the detection circuit 130 of the old model and connected to the input terminal 121 of the detection circuit 120. Similarly, the series circuit is disconnected from the secondary side terminal of the safety device 90, connected to the output terminal 122 of the detection circuit 120, and the old type safety device 90 is replaced with the detection circuit 120.

   Next, as a new wiring, the ground terminal 123 of the detection circuit 120 and the secondary side of the monitoring unit 111 are connected to an arbitrary location of the nearby ground casing 112.

   Finally, the receiving unit 74 and the failure history storage device are installed inside the control unit 50, and the work is completed by laying a power supply line.

(10) Operation Start Process Next, the operation start process of the escalator 10 will be described with reference to the flowchart of FIG.

   In step S1, if the monitoring unit 111 is in the energized state, the process proceeds to step S2 (in the case of Y), and if it is not in the energized state, the process proceeds to step S4 (in the case of N).

   In step S2, the control unit 50 proceeds to step S3 assuming that all the safety devices 90 are normal. That is, it is determined that the monitoring unit 111 is in the energized state, the detection circuit 120 of any of the safety devices 90 has not detected any abnormality, and the safety circuit 100 is normally established.

   In step S3, when the administrator of the escalator 10 performs the operation start operation on the operation panel 52, 56, the operation start condition of the escalator 10 is satisfied and the process proceeds to step S5 (in the case of Y). It returns to step S1 (in the case of N).

   In step S4, the process returns to step S1 on the assumption that the monitoring unit 111 is not in the energized state and the detection circuit 120 of any of the safety devices 90 is operating.

   In step S5, the control unit 50 checks the operation from the reception unit 74 of the control unit 50 to the transmission units 124 of all the detection circuits 120 in order to diagnose whether the transmission unit 124 of each detection circuit 120 is functioning properly. A signal is transmitted and it progresses to step S6.

   In step S6, the transmission unit 124 of the detection circuit 120 that has received the operation confirmation signal transmits an identification signal and a reply signal to the reception unit 74, and the process proceeds to step S7.

   In step S7, if the receiving unit 74 of the control unit 50 can receive the reply signal from the transmitting unit 124 of all the detecting circuits 120, the process proceeds to step S8 (in the case of Y), and identification is made from the transmitting circuit 124 of any of the detecting circuits 120. If the signal and the reply signal can not be received, the process proceeds to step S10 (in the case of N).

   In step S8, the control unit 50 determines that the wireless communication state of the transmission unit 124 of all the detection circuits 120 is normal, and proceeds to step S9.

   In step S9, the control unit 50 starts the operation of the escalator 10.

   In step S10, when the reply signal can not be received from some of the detection circuits 120, the control unit 50 determines the detection circuit 120, and the process proceeds to step S11. In this determination method, the identifiers of all the safety devices 90 and the identifiers of the safety devices 90 that can receive the return signal are compared, and the identifiers of the safety devices 90 that can not be received are extracted.

   In step S11, the control unit 50 stores the identifier of the detection circuit 120 which can not receive the reply signal and the communication error history in the storage unit 78, and proceeds to step S9. The control unit 50 starts the operation of the escalator 10. Do. When there is a communication abnormality in the detection circuit 120, when a failure actually occurs, it is not possible to acquire the failure location. However, since the stop of the escalator 10 is performed by the loss of the power to the monitoring unit 111 when the abnormality occurs and the safety device 90 operates, it is safe to start the operation of the escalator 10 as it is.

(11) Operation Stop Process Next, the operation stop process of the escalator 10 will be described with reference to the flowchart of FIG.

   In step S21, if the monitoring unit 111 is in the energized state, that is, any detection circuit 120 has not detected an abnormality and the safety circuit 100 is normally established, the process proceeds to step S22 (Y state).

   On the other hand, when any of the plurality of detection circuits 120 operates, the power supply to the monitoring unit 111 is cut off, so the control unit 50 immediately stops the operation of the escalator 10 in step S24, and the process proceeds to step S25. move on.

   In step S22, when the administrator performs operation stop operation on the operation panels 52 and 56, the control unit 50 stops the escalator 10 in step S23.

   In step S25, the detection circuit 120 that has operated transmits an identification signal and an abnormality signal, and in step S26, the reception unit 74 performs a reception operation, and the process proceeds to step S27. When one detection circuit 120 is operated, the power supply to the detection device 120 connected to the operated detection circuit 120 and thereafter is cut off. Therefore, when the plurality of safety devices 90 operate, only the detection circuit 120 closest to the power supply device 80 (close to the + V terminal in FIG. 3) transmits the identification signal and the abnormal signal.

   In step S27, when the receiving unit 74 can normally receive the identification signal and the abnormal signal, the process proceeds to step S28 (in the case of Y), and when the reception unit 74 can not normally be received, the process proceeds to step S30 (N If).

   In step S28, the control unit 50 determines a failure location from the received identification signal, and in step S29, the control unit 50 stores the failure location in the storage unit 78 as a failure history of the failure location and ends the process.

   In step S30, since the receiving unit 74 can not normally receive the identification signal and the abnormal signal, the control unit 50 stores it in the storage unit 78 as a failure history of unknown fault location and ends.

(12) Effects According to the present embodiment, since each detection circuit 120 includes the wireless transmission unit 124, the number of cable laying steps and the cable material can be reduced.

   Moreover, since each transmission part 124 does not require a battery like before and operates with the power supply device 80, the escalator 10 can always be operated.

   In addition, with respect to the escalator 10 of the old type, the additional installation of the cable can be minimized, and a highly reliable safety circuit and a failure point determination function can be obtained.

Modified example

   A modification of the above embodiment will be described.

   In the above embodiment, although the DC power supply of the power supply device 80 used for the safety circuit 100 is used, an AC power supply (for example, 200 V) may be selected according to the application of the transmission unit 124 and the monitoring unit 111.

   In the above embodiment, the trigger circuit 127 is connected to the inside of the detection circuit 120, but instead, as shown in FIG. 9, the signal of the output terminal 122 of the detection circuit 120 is input to the transmission unit 124. The number of internal contacts may be reduced.

   Moreover, in the said embodiment, although the receiving part 74 and failure log memory storage were installed in control part 50 inside, you may install not only this but in the arbitrary positions of the truss 12. FIG.

   Moreover, in the said embodiment, although grounding of the safety circuit 100 was performed by the grounding housing | casing 112, it may replace with this, and other grounding methods, such as the ground, may be used.

   Moreover, in the said embodiment, although applied and demonstrated to the escalator 10, it may replace with this and may apply to the moving sidewalk.

   Although one embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and the gist of the invention, and are included in the invention described in the claims and the equivalent scope thereof.

 DESCRIPTION OF SYMBOLS 10 ... Escalator, 12 ... Truss, 50 ... Control part, 74 ... Reception part, 78 ... Storage part, 80 ... Power supply device, 90 ... Safety device, 92 ..・ Abnormality detection unit, 100: Safety circuit, 111: Monitoring unit, 112: Grounding case, 120a-d: Detection circuit, 121: Input terminal, 122: Output terminal, 123 · · · · · · · ground terminal, 124 · · · transmission unit, 125 · · · antenna, 126 · · · b contact type disconnect switch, 127 · · · trigger circuit

In the embodiment of the present invention, the monitoring unit determines that the plurality of safety devices that operate when detecting an abnormality of the passenger conveyor, a monitoring unit that monitors the operation of the safety device, and the safety device operate. A control unit for stopping the passenger conveyor, a power supply device for operating the plurality of safety devices and the monitoring unit, and the safety device provided with the identifier of the safety device when the safety device operates a transmission unit that transmits an identification signal and the abnormal signal representing the received identification signal and the abnormal signal, the identifier of an abnormality has occurred the safety device have a, a receiving unit for determining from the identification signals, a plurality The safety device includes an abnormality detection unit and a detection circuit, and the detection circuit detects the abnormality when the abnormality detection unit detects an abnormality, and the abnormality detection unit detects the abnormality. detection The detection switch and the transmission unit are supplied with power from the power supply device, and in each of the detection circuits, the detection switch is configured to The contact type switch, wherein the power supply device is connected to the input terminal of the detection circuit, the primary terminal of the b contact type switch is connected to the input terminal, and the output terminal is connected to the secondary terminal of the b contact type switch And the input terminal of the other detection circuit is connected in series to the output terminal of the one detection circuit, and a plurality of the detection circuits are all connected in series to form a series circuit.
The power supply device is connected to one terminal of the series circuit, the monitoring unit is connected to the other terminal of the series circuit, one end of the transmission unit is connected to the input terminal, and the other end of the transmission unit Further includes a trigger circuit connected to the ground terminal and outputting a trigger signal to the transmission unit when the abnormality detection unit detects an abnormality, the transmission unit identifying the identification when the trigger signal is input A passenger conveyor for transmitting a signal and the fault signal .

Claims (10)

Multiple safety devices that operate when a passenger conveyor abnormality is detected,
A monitoring unit that monitors the operation of the safety device;
A control unit for stopping the passenger conveyor when the monitoring unit determines that the safety device has been operated;
A power supply device for operating a plurality of the safety devices and the monitoring unit;
A transmitter, provided in the safety device, for transmitting an identification signal representing an identifier of the safety device and an abnormal signal when the safety device is operated;
A receiving unit that receives the identification signal and the abnormal signal and determines an identifier of the safety device in which there is an abnormality from the identification signal;
Passenger conveyor with. The plurality of safety devices each have an abnormality detection unit and a detection circuit;
The detection circuit
A detection switch that operates the monitoring unit when the abnormality detection unit detects an abnormality;
And a transmitter configured to transmit the identification signal and the abnormality signal when the abnormality detection unit detects an abnormality.
The detection switch and the transmission unit are supplied with power from the power supply device.
The passenger conveyor according to claim 1. In each of the detection circuits,
The detection switch is a b-contact type switch,
The power supply device is connected to an input terminal of the detection circuit;
The primary terminal of the b-contact switch is connected to the input terminal,
An output terminal is connected to a secondary side terminal of the b-contact switch,
The input terminal of the other detection circuit is connected in series to the output terminal of one of the detection circuits, and the plurality of detection circuits are all connected in series to form a series circuit.
The power supply device is connected to one terminal of the series circuit;
The monitoring unit is connected to the other terminal of the series circuit.
The passenger conveyor according to claim 2. In each of the detection circuits,
One end of the transmission unit is connected to the input terminal,
The other end of the transmission unit is connected to the ground terminal,
The apparatus further includes a trigger circuit that outputs a trigger signal to the transmission unit when the abnormality detection unit detects an abnormality, and the transmission unit transmits the identification signal and the abnormality signal when the trigger signal is input. Do,
The passenger conveyor according to claim 3. The monitoring unit determines that the safety device has operated when there is no continuity from the output terminal of the last detection circuit in the series circuit.
The passenger conveyor according to claim 4. The receiving unit stores an identifier of the safety device in which there is an abnormality.
The passenger conveyor according to claim 1. The transmission unit transmits an operation confirmation signal to each of the reception units before starting operation of the passenger conveyor.
When the operation confirmation signal is input, the reception unit transmits the identification signal and the reply signal to the transmission unit.
The passenger conveyor according to claim 1. The receiving unit is
When the identification signal and the reply signal are received from all the transmission units, it is determined that all the transmission units are normal,
When the identification signal and the reply signal are not received from at least one of the transmitters, the transmitter determines that the transmitters are normal, and stores the identifier of the detection circuit and the fact that communication is abnormal. ,
The passenger conveyor according to claim 6. When the receiving unit determines that all the transmitting units are normal, the control unit starts the operation of the passenger conveyor.
The passenger conveyor according to claim 8. After the receiving unit stores that the communication with the identifier of the detection circuit is abnormal, the control unit starts the operation of the passenger conveyor.
The passenger conveyor according to claim 8.

Images