JP5985686B1 - elevator - Google Patents

Abstract

An elevator capable of preventing an elevator from being stopped carelessly for self-diagnosis of a safety device is provided. An elevator according to an embodiment includes pulse generators 13a and 13b, position detection switches 14a and 14b, a safety circuit relay 17, a control device 18, and a safety device 40. The pulse generators 13a and 13b output a lift operation signal indicating the lift operation of the elevator 1. The position detection switches 14a and 14b are disposed in the hoistway at intervals, and detect the position of the car 6. The safety device 40 is disposed independently of the control device 18. The control device 18 outputs a first signal indicating whether the elevator 1 is on standby for door closing. The CPUs 46a and 46b of the safety device 40, based on the lifting / lowering operation signal and the first signal, perform safe driving of the elevator including whether or not the contacts are welded when the elevator 1 is not traveling and is waiting for the door closed. Determine whether there are any abnormalities that may cause problems. [Selection] Figure 1

Description

  Embodiments described herein relate generally to an elevator.

  Conventionally, an elevator is provided with a safety device for safe driving. As the safety device, a mechanical safety device, an electronic safety device using a microcomputer or software (hereinafter simply referred to as a safety device) is known. The safety device can realize a safety function equivalent to the mechanical safety device at low cost. The safety device has a function of opening a contact that interrupts the safety circuit of the elevator when there is a failure in the elevator. Further, the safety device has a function as a terminal floor forced deceleration device that decelerates the car when an abnormal speed of the car on the terminal floor of the elevator is detected. In the terminal floor forced deceleration device, car position detecting means for detecting the car position of the elevator is installed in the vicinity of the uppermost floor and the lowermost floor as the terminal floor. Such a safety device periodically performs self-diagnosis on the presence or absence of a failure of each function constituting the safety device.

International Publication No. 2006/033153

  When the safety device performs a self-diagnosis on whether there is a failure while the elevator is running, the safety device opens the contact that shuts off the safety circuit in spite of the elevator running and cares for the elevator. There is a risk of stopping.

  An object of the present embodiment is to provide an elevator that can prevent the elevator from being inadvertently stopped for self-diagnosis of the safety device.

The elevator according to the embodiment includes an elevation operation signal output unit, a position detection unit, a safety circuit, a control device, and a safety device. The lift operation signal output unit outputs a lift operation signal indicating the lift operation of the elevator. The position detector is disposed in the elevator hoistway at an interval to detect the position of the car. The safety circuit stops the operation of the elevator by opening the contact. The control device controls the operation of the elevator. A safety device is provided independently of the control device, and outputs a control signal for opening the contact to the safety circuit when it is determined that the safety device is in an abnormal state that interferes with safe operation of the elevator. Part. The control device outputs a first signal indicating whether the elevator is on standby for door closing and a second signal indicating whether the elevator operates the entire hoistway between the uppermost floor and the lowermost floor. . The processing unit is configured such that the elevator is not running and the elevator is closed based on the lifting / lowering operation signal input from the lifting / lowering operation signal output unit and the first signal input from the control device. When the vehicle is on standby, it interferes with the safe operation of the elevator including the presence or absence of welding with respect to the contacts and the presence or absence of abnormality in each of the constituent devices including the processing unit, the storage unit, and the input / output unit constituting the safety device. Determine if there is an abnormality. The processing unit is further configured to be based on the lifting / lowering operation signal input from the lifting / lowering operation signal output unit and the second signal input from the control device, and the elevator is in the uppermost position. When operating the entire hoistway between the floor and the lowest floor, determine whether all the position detectors have been inspected, and if it is determined that there are undetected position detectors, check A display prompting the user is output as attention information.

1 is a block diagram illustrating an overall configuration of an elevator according to a first embodiment. It is a flowchart which shows the information processing in the control apparatus of the elevator shown in FIG. It is a block diagram which shows the safety device of the elevator shown in FIG. It is a flowchart which shows the information processing in the safety device of the elevator shown in FIG. It is a flowchart which shows the information processing in the safety device of the elevator shown in FIG. It is a flowchart which shows the information processing in the safety device of the elevator shown in FIG. It is a flowchart which shows the information processing in the safety device of the elevator which concerns on Embodiment 2. FIG.

  Hereinafter, the present invention will be described in detail with reference to the drawings. In addition, the following embodiment is an illustration and the range of invention is not limited to them. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same.

[Embodiment 1]
FIG. 1 is a diagram illustrating a schematic configuration example of an elevator according to the embodiment. As shown in FIG. 1, the elevator 1 mainly includes an inverter 2, a hoisting machine 3, a brake circuit 4, brakes 5a and 5b, a car 6, a counterweight 7, a main rope 8, and a compensatory. 9, compen- sation rope 10, governor 11, governor rope 12, pulse generators (elevating operation signal output units) 13a, 13b, position detection switches (position detection units) 14a, 14b, detection piece 15, and relay 16a. , 16b, a safety circuit relay (safety circuit) 17, and a control device 18 for controlling these components. In the present embodiment, for example, the car 6, the counterweight 7, and the main rope 8 are mainly disposed in a hoistway (not shown). For example, the inverter 2, the hoisting machine 3, and the control device 18 are mainly arranged in a machine room (not shown). In addition, you may arrange | position the inverter 2, the winding machine 3, and the control apparatus 18 in a hoistway, without providing a machine room.

  The inverter 2 is electrically connected to the hoisting machine 3 and a control device 18 described later. The inverter 2 drives and stops driving the hoisting machine 3 based on the drive control signal input from the control device 18. The inverter 2 is connected to a power source via a contact.

  The hoisting machine 3 winds up the main rope 8 by rotation and changes the relative position of the car 6 and the counterweight 7 in the ascending / descending direction. In this way, the hoisting machine 3 moves the car 6 up and down in the hoistway. The hoisting machine 3 is speed controlled by the inverter 2. The hoisting machine 3 stops rotating when brakes 5a and 5b described later operate.

  The brake circuit 4 turns on / off the power of the brakes 5a and 5b based on a drive control signal input from the control device 18 described later.

  The brakes 5 a and 5 b perform a brake operation when the power is turned off by the brake circuit 4. Such a brake operation of the brakes 5a and 5b stops the rotation of the hoisting machine 3.

  The car 6 is for passengers to get on and off. The car 6 is disposed between a pair of car guide rails (not shown) installed in the hoistway, and runs along the car guide rails via a guide device (not shown) provided to one or more car guide rails. Ascend and descend by moving up and down in the hoistway. The car 6 is connected to the counterweight 7 by the main rope 8 through the hoisting machine 3. The car 6 is connected to the counterweight 7 by a compensation rope 10 through a compensation sheave 9. The car 6 moves up and down by winding up the main rope 8 with the power of the hoisting machine 3. The car 6 is connected to the governor 11 by a governor rope 12. When the car 6 rotates, the governor 11 rotates.

  The counterweight 7 moves up and down in the hoistway in conjunction with the raising and lowering of the car 6. The counterweight 7 is disposed between a pair of weight guide rails (not shown), and moves up and down along the weight guide rails via a guide device (not shown) provided at least one with respect to the weight guide rails. The counterweight 7 is connected to the car 6 by the main rope 8 through the hoisting machine 3. The counterweight 7 is connected to the car 6 by a compensation rope 10 through a compensation sheave 9.

  The main rope 8 is a plurality of ropes connecting the car 6 and the counterweight 7 and is wound around the hoisting machine 3. The main rope 8 raises and lowers the car 6 and the counterweight 7 in a traction manner.

  The compensation sheave 9 prevents the compensation rope 10 from swinging in the horizontal direction while the car 6 is raised and lowered. The compensatory 9 is arranged in a pit provided on the lower side of the hoistway, and a compen- sive rope 10 is wound around the pit.

  The compensation rope 10 is suspended from the car 6 and the counterweight 7. Specifically, the compen rope 10 has one end connected to the car 6 and the other end connected to the counterweight 7.

  The governor 11 is connected to the car 6 via a governor rope 12. The governor 11 is connected to pulse generators 13a and 13b. The governor 11 is rotated by the raising / lowering operation of the car 6.

  The governor rope 12 is wound around the governor sheave of the governor 11.

  The pulse generators 13a and 13b output a lift operation signal indicating the lift operation of the elevator. Specifically, the pulse generators 13 a and 13 b detect the raising / lowering operation of the car 6 by detecting the rotation of the governor 11. The pulse generators 13a and 13b are electrically connected to a safety device 40 described later. The pulse generators 13a and 13b output the rotation of the governor 11 to the safety device 40 as a pulse generator signal that is a pulse signal.

  The position detection switches 14a and 14b are for detecting the position of the car 6 in the hoistway. The position detection switches 14a and 14b are electrically connected to a safety device 40 described later. A pair of position detection switches 14a and 14b are disposed at the same height of the hoistway. A plurality of pairs of the position detection switches 14a and 14b are arranged at intervals in the vicinity of the lowermost floor and the uppermost floor of the hoistway. The position detection switches 14a and 14b detect proximity and non-proximity of a detection piece 15 described later. The position detection switches 14a and 14b output the detection result of the detection piece 15 to the safety device 40 as a car position signal. Here, the car position signal is output as ON when the position detection switches 14a and 14b detect the detection piece 15 (when the distance from the car 6 becomes a predetermined value or less). The car position signal is output as OFF when the position detection switches 14a and 14b no longer detect the detection piece 15 (when the distance from the car 6 is greater than a predetermined value). More specifically, the car position signal is output as ON only when the car 6 comes close to the floor where the position detection switches 14a and 14b are installed. For this reason, the car 6 is located at the installation position of the position detection switches 14a and 14b that output the car position signal. In this way, the position detection switches 14a and 14b detect the position of the car 6 in the hoistway. The car position signal is output as ON and OFF simultaneously by the pair of position detection switches 14a and 14b. The number of the position detection switches 14a and 14b having such a configuration varies depending on the rated speed of the elevator 1 and the application speed of the applied buffer.

  The detection piece 15 is disposed on the car 6. The detection piece 15 is detected by the position detection switches 14a and 14b when the distance from the position detection switches 14a and 14b becomes a predetermined value or less. This detection result is the car position signal described above.

  The relays 16a and 16b are those in which the safety circuit relay 17 is turned off when the contacts are opened (OFF). Specifically, the relays 16 a and 16 b have their contacts connected in series to the safety circuit relay 17. The relays 16a and 16b are electrically connected to a safety device 40 described later. The relays 16a and 16b keep the contacts of the relays 16a and 16b ON when the relay control signal input from the safety device 40 described later is “relay ON”. The relays 16a and 16b turn off the contacts of the relays 16a and 16b when the relay control signal input from the safety device 40 is “relay OFF”.

  The safety circuit relay 17 stops the operation of the elevator 1 by opening the contact. The contact of the safety circuit relay 17 is turned ON / OFF in conjunction with the ON / OFF of the contacts of the relays 16a and 16b. That is, the contact of the safety circuit relay 17 is turned on when the contacts of the relays 16a and 16b are turned on. Further, the contact of the safety circuit relay 17 is turned off when the contact of the relays 16a and 16b is turned off. The safety circuit relay 17 is connected to a contact disposed between the brakes 5 a and 5 b and the brake circuit 4. The safety circuit relay 17 has a contact point connected to a contact point disposed between the inverter 2 and the power source. For this reason, when the contact of the safety circuit relay 17 is turned OFF, the power supply of the inverter 2 is cut off and the energization of the hoisting machine 3 is cut off. At this time, the power sources of the brakes 5a and 5b are cut off, the brakes 5a and 5b operate, and the hoisting machine 3 stops rotating.

  The control device 18 controls the operation of the elevator 1. The control device 18 controls the drive of the inverter 2 based on an operation signal output by a passenger operating from each device such as an operation panel provided at a landing on each floor or an operation panel provided in the car 6. The car 6 is moved up and down to the destination floor by outputting a signal and controlling the hoisting machine 3. The control device 18 is electrically connected to the inverter 2, the brake circuit 4, and a safety device 40 described later. The control device 18 performs drive control of the hoisting machine 3 and drive control of the brake circuit 4 via the inverter 2. The control device 18 outputs drive control signals to the inverter 2 and the brake circuit 4 respectively. The control device 18 receives a control signal indicating abnormality information from a safety device 40 described later.

  The control device 18 outputs a first diagnostic signal (first signal) and a second diagnostic signal (second signal) related to the operating state of the elevator 1. Here, the first diagnosis signal and the second diagnosis signal are signals according to the operation state after the operation state of the elevator 1 is determined based on the control signal and the operation signal output from each device of the elevator 1. is there. Specifically, the first diagnostic signal is a signal indicating that the elevator 1 is in a door closing stop standby state. The first diagnosis signal is ON when the elevator 1 is in the door closing stop standby state, and is OFF when the elevator 1 is not in the door closing stop standby state. The second diagnostic signal is a signal indicating that the car 6 operates the entire stroke of the hoistway between the uppermost floor and the lowermost floor. The second diagnostic signal is ON when the car 6 operates the entire stroke of the hoistway between the top floor and the bottom floor. The second diagnostic signal is turned ON, for example, when there is a call on the lowest floor or the top floor while the car 6 is waiting on the top floor or the bottom floor, which is the terminal floor. In addition, when the car 6 does not drive the entire hoistway between the uppermost floor and the lowermost floor, the second diagnostic signal is turned off. Specifically, the control device 18 performs a process of outputting a diagnostic signal based on the flow shown in FIG.

  The control device 18 confirms the operation state of the elevator 1 (step S11). Then, the control device 18 determines whether or not the elevator 1 is on standby for door closing (step S12). When it is determined that the elevator 1 is not waiting for the door closing stop (in the case of “No”), the control device 18 proceeds to step S14. When the control device 18 determines that the elevator 1 is in the door closing stop standby state (in the case of “Yes”), the control device 18 proceeds to step S13.

  Then, the control device 18 turns on the first diagnostic signal and outputs it to the safety device 40 (step S13).

  And the control apparatus 18 confirms the call input in the cage | basket | car 6 or a hall | hole (step S14). Then, the control device 18 determines whether or not there is a terminal floor call (step S15). If the control device 18 determines that there is no terminal floor call (in the case of “No”), the control device 18 proceeds to step S19. When the control device 18 determines that there is a call for the terminal floor (in the case of “Yes”), the control device 18 proceeds to step S16.

  Then, the control device 18 turns on the second diagnostic signal and outputs it to the safety device 40 (step S16).

  And the control apparatus 18 confirms the driving | running state of the elevator 1 (step S17). And the control apparatus 18 determines whether the driving | running state of the elevator 1 is a standby | standby after a terminal floor arrival, or a direction change (step S18). If the control device 18 determines that the operation state of the elevator 1 is not standby or direction change after arrival at the terminal floor (in the case of “No”), the processing of this flow is terminated. When the control device 18 determines that the operation state of the elevator 1 is standby after the arrival of the terminal floor or a change of direction (in the case of “Yes”), the control device 18 proceeds to step S19.

  Then, the control device 18 turns off the first diagnosis signal and outputs it to the safety device 40, and ends the processing of this flow (step S19).

  The display device 20 is installed in the machine room. The display device 20 is configured by a display device such as a liquid crystal display, for example. The display device 20 is electrically connected to a safety device 40 described later. The display device 20 displays a processing result of information processing in the safety device 40. Specifically, the display device 20 displays the caution information output from the safety device 40. The display device 20 is confirmed by maintenance personnel during work in the elevator 1.

  The remote monitoring device 30 is installed in a remote monitoring center. The remote monitoring device 30 includes a display device and a storage device. The remote monitoring device 30 is electrically connected to a safety device 40 described later. The remote monitoring device 30 displays the processing result of the information processing in the safety device 40. Specifically, in the remote monitoring device 30, the caution information output from the safety device 40 is displayed on the display device or stored in the storage device. The remote monitoring device 30 is confirmed by maintenance personnel at the remote monitoring center when the elevator 1 is in operation.

  The safety device 40 is disposed independently of the control device 18. The safety device 40 is an electronic safety device that ensures the safety of the elevator 1 by executing a program stored therein. Specific information processing in the safety device 40 will be described later. Further, the safety device 40 has an operation speed abnormality monitoring function as a terminal floor forced deceleration device. Here, the operation speed abnormality monitoring function is a function for controlling the car 6 to be stopped controllably by inverter control at the terminal floor. More specifically, the operation speed abnormality monitoring function is a function of detecting the abnormal speed of the car 6 independently of the elevator 1 and decelerating the car 6 when the speed of the car 6 is determined to be abnormal. The operation speed abnormality monitoring function is implemented as a program having such a function. Specific information processing as the operation speed abnormality monitoring function will be described later.

  The safety device 40 is, for example, a microcomputer or software. As shown in FIG. 3, the safety device 40 is a duplex system, and mainly includes a first interface unit (hereinafter simply referred to as a first I / F) 41 and a second interface unit (hereinafter simply referred to as a second I / F). 42a, 42b, third interface units (hereinafter simply referred to as third I / F) 43a, 43b, display lamps 44a, 44b, memories 45a, 45b, and CPUs (processing units) 46a, 46b.

  The first I / F 41 is an interface through which the first diagnosis signal and the second diagnosis signal output from the control device 18, the car position signal output from the position detection switches 14a and 14b, and the welding monitoring signal are input. It is.

  The second I / F 42a is an interface to which the pulse generator signal output from the pulse generator 13a is input. The second I / F 42a has a counter circuit. This counter circuit counts up and down according to the rotation direction of the pulse generator signal. For example, the counter circuit counts up if the rotation direction of the pulse generator signal is the rotation direction when the car 6 is traveling in the upward direction. The counter circuit counts down if the rotation direction of the pulse generator signal is the rotation direction when the car 6 is traveling in the downward direction. The second I / F 42a outputs the pulse count value obtained by pulse counting to the CPUs 46a and 46b as a pulse generator signal. The second I / F 42b is an interface to which the pulse generator signal output from the pulse generator 13b is input, and is configured similarly to the second I / F 42a.

  The third I / F 43 a is an interface that outputs data to the control device 18, the relay 16 a, the display device 20, and the remote monitoring device 30. Specifically, the third I / F 43 a outputs abnormality information obtained as a result of information processing in the safety device 40 to the control device 18. The third I / F 43a outputs the caution information obtained as a result of the information processing in the safety device 40 to the display device 20 and the remote monitoring device 30. The third I / F 43a outputs a relay control signal for controlling the relay 16a to the relay 16a. The third I / F 43b is an interface that outputs data to the control device 18, the relay 16b, the display device 20, and the remote monitoring device 30, and is configured in the same manner as the third I / F 43a.

  The display lamp 44a is composed of, for example, a 7-segment display (7SEGLED). The display lamp 44b is configured similarly to the display lamp 44a.

  The memory 45a stores programs and necessary data necessary for information processing in the safety device 40. The memory 45a is configured by, for example, E2PROM. The memory 45a stores a program and necessary data necessary for information processing as an electronic safety device. For example, the memory 45a stores a preset speed reference for each car position necessary for information processing in the operation speed abnormality monitoring function as speed reference data. The memory 45b is configured similarly to the memory 45a, and stores the same program and data.

  The CPU 46a executes information stored in the safety device 40 by executing a program stored in the memory 45a. The CPU 46a has a function of outputting a control signal for opening the contacts to the relays 16a and 16b when it is determined that the abnormality causes an obstacle to the safe driving of the elevator 1. The CPU 46b executes information stored in the safety device 40 by executing a program stored in the memory 45b, and is configured in the same manner as the CPU 46a. When the CPU 46a and the CPU 46b are operating normally, the same information processing is executed simultaneously and the same processing result is obtained. For this reason, the CPU 46a and the CPU 46b monitor the operation of each other, and for example, if there is an abnormality such as a shift in information processing timing or a difference in processing result, the contacts of the relays 16a and 16b are turned off.

  The CPU 46a performs information processing as an electronic safety device. Specifically, the CPU 46a performs processing based on the flow shown in FIGS.

  The CPU 46a performs main processing based on the flow shown in FIG.

  The CPU 46a performs initialization (step S21). Here, initialization refers to initializing temporary data such as an abnormality flag and a caution flag stored in the memories 45a and 45b when the safety device 40 is powered on or reset. It is. Then, the CPU 46a waits for an interrupt as a main routine process (step S22). When an interrupt occurs, the CPU 46a performs a safety function and related processing (periodic interrupt processing). This periodic interrupt process will be described below.

  The CPU 46a performs signal input processing (step S31). The CPU 46a stores, in the memory 45a, the pulse generator signal input from the pulse generator 13a via the second I / F 42a and the car position signal input from the position detection switches 14a and 14b via the first I / F 41. When the car position signal is input from the position detection switches 14a and 14b, the CPU 46a determines that the car 6 is traveling at the installation position of the position detection switches 14a and 14b. In addition, the CPU 46a receives the diagnosis signal, the welding monitoring signal input from the control device 18 via the first I / F 41, the abnormality information, the caution information, and the first relay control signal output via the third I / F 43a. Store in the memory 45a.

  And CPU46a performs a driving | running state monitoring process (step S32). Based on the pulse generator signal, the CPU 46a determines an operating state including whether the car 6 is running or stopped, and whether the car 6 is moving up or down. When the CPU 46a determines that the car 6 is traveling, the CPU 46a calculates the speed of the car 6. Here, calculation of the speed of the car 6 in the CPU 46a will be described. The CPU 46a calculates the movement distance based on the distance per pulse from the count value detected last time and the count value counted this time. Then, the CPU 46a calculates the speed of the car 6 from the moving distance of the car 6 and the periodic interrupt period time. In this way, the CPU 46a calculates the speed of the car 6. At this time, the CPU 46a stores the determined operating state and the calculated speed of the car 6 in the memory 45a.

  Then, the CPU 46a performs an operation speed abnormality monitoring process as an operation speed abnormality monitoring function (step S33). Specifically, the CPU 46a performs the following processing as information processing in the driving speed abnormality monitoring processing. The CPU 46a compares the speed of the car 6 calculated in step S32 with the speed of the car 6 in the speed reference data for the position of the car 6 detected by the position detection switches 14a and 14b. When the calculated speed of the car 6 exceeds the speed of the car 6 of the speed reference data, the CPU 46a determines that the car 6 is traveling at an abnormal speed. When the CPU 46a determines that the car 6 is traveling at an abnormal speed, the CPU 46a turns on the abnormality flag.

  Then, the CPU 46a performs peripheral device abnormality monitoring processing (step S34). The CPU 46a monitors peripheral devices of the safety device 40 in order to maintain the operation speed abnormality monitoring function in the safety device 40 normally. As information processing for monitoring the peripheral device of the safety device 40, the CPU 46a determines, for example, the consistency of the pulse generator signal or the consistency of the two position detection switches 14a and 14b installed at the same height. Determine whether all position detection switches 14a, 14b have been inspected (monitoring processing of position detection switches 14a, 14b described later), and determine whether there is an abnormality in the internal circuit of the safety device 40 (For example, monitoring process of welding of the relay 16a described later). The CPU 46a determines that there is an abnormality when the pulse generator signals are not matched. When the two position detection switches 14a and 14b installed at the same height are not matched, the CPU 46a determines that there is an abnormality. When there is an abnormality in the internal circuit of the safety device 40 (for example, when the relay 16a is welded), the CPU 46a determines that it is abnormal. When the CPU 46a determines that there is any abnormality, the CPU 46a turns on the abnormality flag.

  Then, the CPU 46a performs output processing (step S35). When the abnormality flag is ON as a result of the processing in steps S33 and S34, the CPU 46a outputs a relay control signal for turning off the contact of the relay 16a. When the contact of the relay 16a is turned off, the contact of the safety circuit relay 17 is turned off. When the contact of the safety circuit relay 17 is turned off, the elevator 1 is turned off from the power source of the inverter 2. And electricity supply of the hoisting machine 3 is interrupted | blocked. At this time, the power sources of the brakes 5a and 5b are cut off, the brakes 5a and 5b operate, and the hoisting machine 3 stops rotating. As a result, the elevator 1 is restricted from operating while stopped. In addition, when the caution flag is ON, the CPU 46a outputs the caution information to the display device 20 to continue the operation of the elevator 1 and performs a display for prompting the inspection or outputs it to the remote monitoring device 30. In the remote monitoring center, attention information is notified from the remote monitoring device 30 to prompt maintenance and to instruct maintenance personnel. Moreover, the elevator 1 is operated and diagnosed by the remote inspection command from the remote monitoring center to the control device 18 and the safety device 40 so that the self-diagnosis of all parts can be performed while the car 6 is on standby.

  Then, the CPU 46a performs a normal state return standby process (step S36). When the abnormality flag is ON, the CPU 46a sets the abnormality flag to the ON state until the location where the abnormality of the elevator 1 is found is inspected and repaired and the safety of the elevator 1 is confirmed by maintenance personnel. Stop.

  In step S34, the CPU 46a performs monitoring processing of the position detection switches 14a and 14b as peripheral device abnormality monitoring processing based on the flow shown in FIG. In the monitoring process of the position detection switches 14a and 14b, the CPU 46a is operating the elevator 1 based on the pulse generator signal and the second diagnostic signal, and the elevator 1 is between the uppermost floor and the lowermost floor. When operating the entire process of the hoistway, it is determined whether or not all the position detection switches 14a and 14b have been inspected, and attention information is output based on the determined result.

  The CPU 46a confirms the pulse generator signal (step S41). The CPU 46a confirms the pulse count value stored in the memory 45a and the speed of the car 6 in step S31.

  Then, the CPU 46a determines whether or not the elevator 1 is traveling (step S42). Here, whether or not the elevator 1 is traveling is determined by the speed of the car 6. At this time, in order not to erroneously determine the vibration of the car 6 due to passengers getting on and off when the car 6 is stopped, for example, when the car 6 is traveling when exceeding a predetermined speed such as several m / min. judge. When the CPU 46a determines that the elevator 1 is not traveling (in the case of “No”), the CPU 46a ends the processing of this flow and returns to the original routine. When the CPU 46a determines that the elevator 1 is traveling (in the case of “Yes”), the CPU 46a proceeds to Step S43. That is, in the monitoring process of the position detection switches 14a and 14b, the following process is executed only when the elevator 1 is traveling.

  Then, the CPU 46a confirms the car position signal from the position detection switches 14a and 14b (step S43). The CPU 46a confirms the car position signal stored in the memory 45a in step S31.

  Then, the CPU 46a determines duplication consistency (step S44). The CPU 46a determines whether or not the signals of the duplicated position detection switches 14a and 14b perform the same operation. Here, the duplicated position detection switches 14a and 14b are a pair of position detection switches 14a and 14b installed at the same height. Further, the same operation means that signals from the position detection switches 14 a and 14 b are simultaneously input to the safety device 40. As described above, the position detection switches 14a and 14b lose the duplex consistency when a failure occurs. Therefore, the position detection switches 14a and 14b determine that they are operating normally if there is duplex consistency. Further, the position detection switches 14a and 14b are determined to be abnormal if there is no duplex consistency. When the signals of the position detection switches 14a and 14b perform the same operation, the CPU 46a determines that the operation is normal. The CPU 46a determines that there is an abnormality when the signals of the position detection switches 14a and 14b are operated at different times, such as when only one of them is input. If the CPU 46a determines that there is an abnormality (in the case of “No”), the CPU 46a proceeds to step S54. When it is determined that the CPU 46a is operating normally (in the case of “Yes”), the CPU 46a proceeds to Step S45.

  Then, the CPU 46a determines whether or not the operation order is correct (step S45). The CPU 46a determines whether or not the traveling direction (the ascending direction or the descending direction) of the car 6 and the order in which the position detection switches 14a and 14b operate are aligned. For example, when the car 6 is traveling in the downward direction from the top floor to the bottom floor, the position detection switches 14a and 14b installed in the vicinity of the bottom floor from the intermediate floor are turned ON / OFF sequentially from the top. If it is operating, it is determined that it is operating normally. In addition, the CPU 46a performs an ON / OFF operation in which the position detection switches 14a and 14b installed in the vicinity of the lowest floor from the middle floor are turned on, or the position detection switches 14a and 14b having different heights are simultaneously turned ON / OFF. If it operates, it is determined to be abnormal. If the CPU 46a determines that there is an abnormality (in the case of “No”), the CPU 46a proceeds to step S54. When the CPU 46a determines that it is operating normally (in the case of “Yes”), the CPU 46a proceeds to step S46.

  Then, the CPU 46a confirms the second diagnostic signal (step S46). The CPU 46 a confirms the second diagnostic signal output from the control device 18.

  Then, the CPU 46a determines whether or not the second diagnosis signal is ON (step S47). When the CPU 46a determines that the second diagnosis signal is not ON (in the case of “No”), the CPU 46a ends the processing of this flow and returns to the original routine. When the CPU 46a determines that the second diagnosis signal is ON (in the case of “Yes”), the CPU 46a proceeds to Step S48. That is, the diagnosis processing for determining whether or not there are undetected position detection switches 14a and 14b is executed only when the car 6 operates the entire hoistway path between the uppermost floor and the lowermost floor.

  Then, the CPU 46a confirms the input of all the position detection switches 14a and 14b (step S48). At this time, the CPU 46a stores the processing time of step S48 in the memory 45a.

  Then, the CPU 46a determines whether or not there are undetected position detection switches 14a and 14b (step S49). Here, the diagnosis is performed on the assumption that all the position detection switches 14a and 14b cannot be diagnosed due to disconnection of the diagnostic signal or poor contact. The CPU 46a determines whether or not there are position detection switches 14a and 14b that are not input among all the position detection switches 14a and 14b. When there is no undetected position detection switch 14a, 14b (in the case of “No”), the CPU 46a proceeds to Step S52. If there are undetected position detection switches 14a and 14b (in the case of “Yes”), the CPU 46a proceeds to Step S50.

  Then, the CPU 46a confirms the first elapsed time that has elapsed since confirmation of the input of all the position detection switches 14a and 14b in step S48 last time (step S50). Then, the CPU 46a determines whether or not the first elapsed time confirmed in step S50 is equal to or longer than the first predetermined time (step S51). When the CPU 46a determines that the first elapsed time is less than the first predetermined time (in the case of “No”), the CPU 46a proceeds to Step S52. If the CPU 46a determines that the first elapsed time is equal to or longer than the first predetermined time (in the case of “Yes”), the CPU 46a proceeds to step S53.

  Then, the CPU 46a turns off the caution flag, ends the processing of this flow, and returns to the original routine (step S52).

  Then, the CPU 46a turns on the attention flag, ends the processing of this flow, and returns to the original routine (step S53). As a result, when the first predetermined time or more has elapsed since the input of all the position detection switches 14a and 14b was confirmed last time, the attention flag is turned ON. For this reason, in the safety device 40, it is suppressed that the self-diagnosis about all the position detection switches 14a and 14b is left without being performed for a long time.

  Then, the CPU 46a turns on the abnormality flag, ends the processing of this flow, and returns to the original routine (step S54).

  In step S34, for example, the CPU 46a performs a monitoring process for welding the contacts of the relay 16a as a peripheral apparatus abnormality monitoring process based on the flow shown in FIG. In the welding monitoring process, when the elevator 1 is not running and the elevator 1 is in the door closing stop standby state based on the pulse generator signal and the first diagnostic signal, the CPU 46a takes the elevator 16 for the contact of the relay 16a. The presence or absence of welding, which is an abnormality that hinders safe driving, is determined. Further, in the welding monitoring process, when the elevator 1 is in the door closing stop standby state based on the first diagnostic signal, the second predetermined time or more has elapsed since the previous determination of the presence or absence of the contact welding. If it is determined that it has elapsed, attention information is output.

  The CPU 46a confirms the pulse generator signal (step S61). This process is the same as step S41.

  Then, the CPU 46a determines whether or not the elevator 1 is traveling (step S62). This process is the same as step S42. If the CPU 46a determines that the elevator 1 is traveling (in the case of “Yes”), the CPU 46a ends the processing of this flow and returns to the original routine. When the CPU 46a determines that the elevator 1 is not traveling (in the case of “No”), the CPU 46a proceeds to Step S63. That is, in the monitoring process of the welding of the contacts of the relay 16a, the following process is executed only when the elevator 1 is not running. This is to prevent the elevator 1 from being stopped carelessly for the self-diagnosis of the safety device 40.

  Then, the CPU 46a confirms the second elapsed time that has elapsed since the last time the contact of the contact of the relay 16a was confirmed in step S67 (step S63). Then, the CPU 46a determines whether or not the second elapsed time confirmed in step S63 is equal to or longer than a second predetermined time (step S64). Here, it is preferable that the second predetermined time is sufficiently shorter than the relay failure interval. For example, once a day, soundness is ensured by diagnosing the welding of the contacts of the relay 16a. When the CPU 46a determines that the second elapsed time is less than the second predetermined time (in the case of “No”), the CPU 46a ends the processing of this flow and returns to the original routine. When the CPU 46a determines that the second elapsed time is equal to or longer than the second predetermined time (in the case of “Yes”), the CPU 46a proceeds to Step S65.

  Then, the CPU 46a confirms the first diagnostic signal (step S65). Then, the CPU 46a determines whether or not the first diagnostic signal is ON (step S66). When the CPU 46a determines that the first diagnosis signal is OFF (in the case of “No”), the CPU 46a proceeds to Step S70. When the CPU 46a determines that the first diagnosis signal is ON (in the case of “Yes”), the process proceeds to step S67 because the elevator 1 is waiting for the door closing stop. At this time, the CPU 46a stores the processing time at which the first diagnosis signal is determined to be ON in step S66 in the memory 45a.

  Then, the CPU 46a turns off the contacts of the relays 16a and 16b and confirms the welding (step S67). Then, the CPU 46a determines whether or not there is welding (step S68). When determining that there is no welding (in the case of “No”), the CPU 46a ends the processing of this flow and returns to the original routine. When it is determined that there is welding (in the case of “Yes”), the CPU 46a proceeds to step S69.

  Then, the CPU 46a turns on the abnormality flag, ends the processing of this flow, and returns to the original routine (step S69).

  Then, the CPU 46a confirms the third elapsed time that has elapsed since the time when the first diagnosis signal was determined to be ON in step S66 last time (step S70). Then, the CPU 46a determines whether or not the third elapsed time is equal to or longer than a third predetermined time (step S71). When the CPU 46a determines that the third elapsed time is less than the third predetermined time (in the case of “No”), the CPU 46a proceeds to Step S72. When the CPU 46a determines that the third elapsed time is equal to or longer than the third predetermined time (in the case of “Yes”), the CPU 46a proceeds to Step S73.

  Then, the CPU 46a turns off the caution flag, ends the processing of this flow, and returns to the original routine (step S72).

  Then, the CPU 46a turns on the attention flag, ends the processing of this flow, and returns to the original routine (step S73). As a result, when the third predetermined time or more has elapsed since the last time the contacts of the relays 16a and 16b were confirmed to be welded, the caution flag is turned ON. For this reason, in the safety device 40, it is suppressed that the self-diagnosis about the welding of the contacts of the relays 16a and 16b is not performed for a long time.

  The CPU 46b performs the same processing as the information processing in the CPU 46a described above. Since the CPU 46a and the CPU 46b are duplicated, the same information processing is executed at the same time and the same processing result is obtained when operating normally.

  In this way, the safety device 40 of the elevator 1 according to the embodiment performs information processing for monitoring peripheral devices of the safety device 40 in order to normally maintain the operation speed abnormality monitoring function.

  The elevator 1 according to the embodiment is configured as described above, and the effects thereof will be described below.

  Thus, according to the elevator 1 which concerns on embodiment described above, in order to maintain the driving speed abnormality monitoring function in the safety device 40 normally, the peripheral device of the safety device 40 is monitored. At that time, the safety device 40 can perform a self-diagnosis in accordance with the operation state of the elevator 1 based on the first diagnostic signal and the second diagnostic signal. Specifically, the safety device 40 welds the contacts of the relays 16a and 16b when the elevator 1 is stopped and the first diagnostic signal is ON, that is, when the elevator 1 is on standby for door closing. Perform self-diagnosis for the presence or absence. Thereby, the safety device 40 can suppress stopping the elevator 1 carelessly for self-diagnosis. In this way, the safety device 40 can suppress the elevator 1 from being stopped carelessly for self-diagnosis.

  Further, when the second diagnostic signal is ON, that is, when the car 6 operates between the top floor and the bottom floor, the safety device 40 checks the input of all the position detection switches 14a and 14b. Diagnosis processing is performed to determine whether there are undetected position detection switches 14a and 14b. As a result, the safety device 40 can reliably perform self-diagnosis of all the position detection switches 14a and 14b. Thus, the safety device 40 can perform self-diagnosis of all functions (in the present embodiment, all the position detection switches 14a and 14b).

  Further, according to the elevator 1 according to the embodiment, the safety device 40 includes the relays 16a and 14b when the position detection switches 14a and 14b do not have duplex consistency, and the operation order of the position detection switches 14a and 14b is not correct. In the case where there is welding at the contact 16b, if such an abnormality that hinders safe operation is found, the abnormality flag is turned ON. When the abnormality flag is turned on, the elevator 1 is restricted from operating in a stopped state. Thereby, the elevator 1 can be made into the state which stopped the elevator 1 reliably, when the abnormality which disturbs safe driving | operation is found as a result of the self-diagnosis process.

  Further, according to the elevator 1 according to the embodiment, the safety device 40 includes the undetected position detection switches 14a and 14b among all the position detection switches 14a and 14b, and all the position detection switches 14a last time. , 14b after the first elapsed time is longer than the first predetermined time, i.e., when there is no abnormality that hinders safe driving, but the self-diagnosis has not been performed completely, the caution flag is set. Turn it on. When the caution flag is ON, the safety device 40 may output the caution information to the display device 20 to continue the operation of the elevator 1 and display the urgency for inspection or output it to the remote monitoring device 30. it can. Thereby, the safety device 40, for example, when the floor near the terminal floor is set non-stop as the operation of the building where the elevator 1 is installed, and the entire process between the top floor and the bottom floor is not operated. Even so, the self-diagnosis of all the position detection switches 14a and 14b is prevented from being left without being performed for a long time.

  Further, according to the elevator 1 according to the embodiment, the safety device 40 turns on the caution flag when the third predetermined time or more has elapsed since the last self-diagnosis of the welding of the contacts of the relays 16a and 16b. To do. When the caution flag is ON, the safety device 40 may output the caution information to the display device 20 to continue the operation of the elevator 1 and display the urgency for inspection or output it to the remote monitoring device 30. it can. Thereby, the safety device 40 suppresses that the self-diagnosis about the welding of the contacts of the relays 16a and 16b is not left for a long time.

  Further, according to the elevator 1 according to the embodiment, the remote monitoring device 30 is notified of the caution information, so that, for example, it is possible to prompt maintenance support or to instruct maintenance personnel. Further, the elevator 1 operates the elevator 1 so that self-diagnosis of all parts can be performed while the car 6 is on standby, for example, by issuing a remote inspection command from the remote monitoring center to the control device 18 and the safety device 40. Diagnosis can be made.

[Embodiment 2]
FIG. 7 is a flowchart showing information processing in the elevator 1 according to the second embodiment. In the present embodiment, the CPU 46a is different from the first embodiment in that the position detection switches 14a and 14b are monitored based on the flow shown in FIG. Other configurations in the present embodiment are the same as those in the first embodiment.

  When the CPU 46a determines that the position detection switches 14a and 14b are abnormal to hinder the safe operation of the elevator 1, the position detection switches 14a and 14b determined to be abnormal are in the direction of travel in response to the call of the elevator 1. When it is determined whether the position detection switches 14a and 14b are positioned forward, it is determined whether the position detection switches 14a and 14b are positioned forward, a control signal for opening the contacts of the relays 16a and 16b is output, and the position detection switches 14a and 14b are When it is determined that the vehicle is not positioned forward, a process of outputting a control signal for opening the contacts of the relays 16a and 16b after stopping the operation in the traveling direction in response to the call is performed.

  Steps S81 to S93 are the same as the processes shown in steps S41 to S53 of the first embodiment, and thus description thereof is omitted. The CPU 46a determines duplication consistency (step S84). If the CPU 46a determines that there is an abnormality (in the case of “No”), the CPU 46a proceeds to step S94. When it is determined that the CPU 46a is operating normally (in the case of “Yes”), the CPU 46a proceeds to Step S85. Then, the CPU 46a determines whether or not the operation order is correct (step S85). If the CPU 46a determines that there is an abnormality (in the case of “No”), the CPU 46a proceeds to step S94. If the CPU 46a determines that it is operating normally (in the case of “Yes”), it proceeds to step S86.

  The CPU 46a determines whether or not the front position detection switches 14a and 14b are abnormal (step S94). Here, when a switch behind the car 6 breaks down, there is no problem until the current operation ends. For this reason, in this embodiment, when the position detection switches 14a and 14b in which an abnormality is found in step S84 or step S85 are positioned in front of the car 6, the elevator 1 is stopped. If the CPU 46a determines that the front position detection switches 14a and 14b are not abnormal (in the case of “No”), the CPU 46a proceeds to step S95. When the CPU 46a determines that the front position detection switches 14a and 14b are abnormal (in the case of “Yes”), the CPU 46a proceeds to step S96.

  Then, the CPU 46a determines whether or not the vehicle is traveling (step S95). When the CPU 46a determines that the vehicle is running (in the case of “Yes”), the CPU 46a ends the processing of this flow and returns to the original routine. When the CPU 46a determines that the vehicle is not traveling (in the case of “No”), the CPU 46a proceeds to Step S96.

  Then, the CPU 46a turns on the abnormality flag, ends the processing of this flow, and returns to the original routine (step S96).

  According to such an elevator 1, in addition to the effects of the first embodiment, the safety device 40 is configured so that the position detection switches 14a and 14b do not have duplex consistency or the operation order of the position detection switches 14a and 14b. Even if the position is not correct, if the position detection switches 14a and 14b on the front side are not abnormal, the current operation is not hindered, so the elevator 1 should be stopped carelessly until the current operation is over. Can be suppressed. Thus, the safety device 40 can suppress stopping the elevator 1 in a state where passengers are confined in the car 6 when there is no hindrance to the current operation. Further, in the safety device 40, when the position detection switches 14a and 14b do not have duplex consistency or when the operation order of the position detection switches 14a and 14b is not correct, the front position detection switches 14a and 14b If this is the case, the elevator 1 can be quickly stopped.

  The above-described embodiments can be combined without departing from the scope of the invention.

  For example, when the safety device 40 turns on the caution flag in the information processing in the CPU 46a, the safety device 40 records a code indicating the undetected position detection switches 14a and 14b, and uses the code as a part of the caution information. It is possible to notify maintenance personnel which parts should be inspected by displaying them on the screen or transmitting them to the remote monitoring device 30.

  As peripheral device abnormality monitoring processing, each component device (internal circuit) including the CPU 46a, the memory 45a, the first I / F 41, the second I / F 42a, 42b, and the third I / F 43a, 43b constituting the safety device 40. The case of performing monitoring processing for presence / absence of abnormality (monitoring processing of internal circuit of the safety device) will be described. When the elevator 1 is not traveling and the elevator 1 is in the door closing stop standby state based on the pulse generator signal and the first diagnostic signal, the CPU 46a configures each of the above-described components constituting the safety device 40. The presence or absence of an abnormality that interferes with the safe driving of the elevator 1 is determined. In the monitoring process of the internal circuit of the safety device, information processing is executed between, for example, step S66 and step S67 described above. When the CPU 46a determines that there is no abnormality in each component device constituting the safety device 40 (in the case of “No”), the CPU 46a proceeds to Step 67. If the CPU 46a determines that there is an abnormality in each component device constituting the safety device 40, the process proceeds to step S69.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

  1 Elevator, 2 Inverter, 3 Hoisting machine, 4 Brake circuit, 5a, 5b Brake, 6 Car, 7 Counter weight, 8 Main rope, 9 Compensation, 10 Compo rope, 11 Governer, 12 Governor rope, 13a, 13b Pulse generator (Elevating operation signal output unit), 14a, 14b position detection switch (position detection unit), 15 detection piece, 16a, 16b relay, 17 safety circuit relay (safety circuit), 18 control device, 20 display device, 30 remote monitoring device , 40 Safety device, 46a, 46b CPU (Processor)

Claims (4)

An elevator operation signal output unit that outputs an elevator operation signal indicating elevator operation, a position detection unit that is disposed in the elevator hoistway at an interval and detects the position of the car, and a contact is opened. When it is determined that the safety circuit that stops the operation of the elevator, the control device that controls the operation of the elevator, and an abnormality that is disposed independently of the control device and that interferes with the safe operation of the elevator. A safety device having a processing unit that outputs a control signal for opening the contact to the safety circuit, the control device comprising: a first signal indicating whether the elevator is in a door closing stop ; and and it outputs a second signal indicating whether to operate the entire process of the hoistway between the elevator top floor and the lowermost floor, the processing unit, the lifting operation signal input from the elevating operation signal output section On the basis of the first signal input from the control device, the presence or absence of welding or the safety device is configured for the contact when the elevator is not running and the elevator is in a door closing stop standby state. Determining whether there is an abnormality that interferes with the safe driving of the elevator, including the presence or absence of abnormality, for each component device including the processing unit, the storage unit, and the input / output unit, and the processing unit further includes the lifting operation signal output unit The elevator is running on the basis of the lifting operation signal input from the controller and the second signal input from the control device, and the elevator is in a hoistway between the uppermost floor and the lowermost floor. When driving the entire stroke, it is determined whether all the position detectors have been inspected, and if it is determined that there are position detectors that have not been inspected, a warning prompting the inspection is displayed. Elevator, characterized in output to it as. An elevator operation signal output unit that outputs an elevator operation signal indicating elevator operation, a position detection unit that is disposed in the elevator hoistway at an interval and detects the position of the car, and a contact is opened. When it is determined that the safety circuit that stops the operation of the elevator, the control device that controls the operation of the elevator, and an abnormality that is disposed independently of the control device and that interferes with the safe operation of the elevator. And a safety device that outputs a control signal for opening the contact point to the safety circuit, and the control device outputs a first signal indicating whether the elevator is in a door closing stop standby state. The processing unit is configured so that the elevator is running based on the lifting / lowering operation signal input from the lifting / lowering operation signal output unit and the first signal input from the control device. In addition, when the elevator is in the door closing stop waiting state, the presence or absence of welding for the contact points and the presence or absence of abnormality for each component device including the processing unit, the storage unit, and the input / output unit constituting the safety device are included. The presence or absence of an abnormality that interferes with the safe driving of the elevator is determined, the processing unit is further based on the first signal input from the control device, if the elevator is not waiting for door closing stop, It determines whether a predetermined time to determine the presence or absence of welding of the contact has passed, if it is determined that the elapsed, and outputs a display prompting the inspection as warning information, and wherein the elevator. An elevator operation signal output unit that outputs an elevator operation signal indicating elevator operation, a position detection unit that is disposed in the elevator hoistway at an interval and detects the position of the car, and a contact is opened. When it is determined that the safety circuit that stops the operation of the elevator, the control device that controls the operation of the elevator, and an abnormality that is disposed independently of the control device and that interferes with the safe operation of the elevator. And a safety device that outputs a control signal for opening the contact point to the safety circuit, and the control device outputs a first signal indicating whether the elevator is in a door closing stop standby state. The processing unit is configured so that the elevator is running based on the lifting / lowering operation signal input from the lifting / lowering operation signal output unit and the first signal input from the control device. In addition, when the elevator is in the door closing stop waiting state, the presence or absence of welding for the contact points and the presence or absence of abnormality for each component device including the processing unit, the storage unit, and the input / output unit constituting the safety device are included. The presence or absence of an abnormality that hinders safe driving of the elevator is determined, and the processing unit is further determined as the abnormality when it is determined that the position detection unit is an abnormality that hinders safe driving of the elevator. If the position detection unit is positioned ahead of the traveling direction responding to the call of the elevator, and if it is determined that the position detection unit is positioned forward, the contact point with respect to the safety circuit Is output to the safety circuit after stopping the operation in the traveling direction in response to the call, And it outputs a control signal for opening the serial contact, elevator, characterized in that. At least one of a display device installed near the elevator and displaying a processing result in the processing unit and a remote monitoring device installed remotely from the elevator and displaying the processing result in the processing unit The elevator according to any one of claims 1 to 3 .

Images