Elevator device

Abstract

The invention discloses an elevator device which is provided with an emergency stop device operated by an electric actuator and also has an operation function during power failure. The elevator device includes: a car; the emergency stop device is arranged on the lift car; a driving mechanism for driving the emergency stop device; an electric actuator (10) that operates the drive mechanism; and a controller (7) that controls the operation of the car. The electric actuator includes: a mover (34a, 34b, 34c) that is mechanically connected to the drive mechanism; and electromagnets (35a, 35b) facing the mover. The elevator device is provided with: a DC power source (300) that is connected to the electromagnets via power supply contacts (150) and that excites the electromagnets; the storage battery (111) is connected with the electromagnet, the controller cuts off the power supply contact during power failure, and when the power supply contact is cut off, the electromagnet is excited by the storage battery.

Description

Technical Field

[0001] The present invention relates to an elevator device including an emergency stop device actuated by an electric actuator. Background Art

[0002] In order to always monitor the lifting speed of the car and make an emergency stop of the car that falls into a specified overspeed state, a speed governor and an emergency stop device are provided in the elevator device. Generally, the car and the speed governor are connected by a speed governor rope. When an overspeed state is detected, the speed governor limits the speed governor rope to activate the emergency stop device on the car side, thereby stopping the car urgently.

[0003] In such elevator device, owing to the speed governor rope of long object being laid in the hoistway, it is difficult to save space and reduce costs. In addition, when the speed governor rope swings, the structure in the hoistway interferes with the speed governor rope easily.

[0004] In view of this, an emergency stop device that operates electrically without using a speed governor rope has been proposed. As a prior art related to such an emergency stop device, the technology described in Patent Document 1 is known.

[0005] In this prior art, a driving shaft for driving the emergency stop device and an electric actuator for moving the driving shaft are provided on the car. The electric actuator includes a movable iron core mechanically connected to the driving shaft and an electromagnet that attracts the movable iron core. The driving shaft is urged by a driving spring, but in normal circumstances, the movable iron core is attracted by the electromagnet when it is energized, so that the movement of the driving shaft is restricted by the electric actuator.

[0006] In an emergency, the electromagnet is demagnetized, the restriction of the drive shaft is released, and the drive shaft is driven by the force of the drive spring. As a result, the emergency stop device is activated and the car stops urgently.

[0007] In addition, when the emergency stop device is restored to the normal state, the electromagnet is moved and close to the movable iron core that has been moved in the emergency. The electromagnet has a feed nut threadedly engaged with the feed screw shaft, and when the feed screw shaft is rotated by the motor, the electromagnet moves toward the movable iron core. When the electromagnet abuts against the movable iron core, the movable iron core is adsorbed by the electromagnet. In addition, in a state where the movable iron core is adsorbed on the electromagnet, the electromagnet is moved so that the movable iron core and the electromagnet return to the normal standby position.

[0008] Prior art literature

[0009] Patent Literature

[0010] Patent Document 1: Japanese Patent Application Publication No. 2021-130550 Summary of the invention

[0011] Technical problem to be solved by the invention

[0012] In the above prior art, when the power supply of the electromagnet disappears due to a power outage, the electric actuator is activated and the emergency stop device is activated, as in the case of overspeed detection. Therefore, depending on the state of the electric actuator, the operation of the car during a power outage or when power is restored becomes difficult.

[0013] Therefore, the present invention provides an elevator device which has both an emergency stop device operated by an electric actuator and a function of operating during a power outage.

[0014] Technical means for solving technical problems

[0015] In order to solve the above problems, the elevator device of the present invention includes: a car; an emergency stop device arranged on the car; a driving mechanism for driving the emergency stop device; an electric actuator for causing the driving mechanism to operate; and a controller for controlling the operation of the car, the electric actuator includes: a mover mechanically connected to the driving mechanism; and an electromagnet opposite to the mover, the elevator device includes: a DC power supply connected to the electromagnet via a power supply contact to excite the electromagnet; and a battery connected to the electromagnet, the controller cuts off the power supply contact when a power outage occurs, and when the power supply contact is cut off, the battery excites the electromagnet.

[0016] Effects of the Invention

[0017] According to the present invention, an elevator apparatus including an emergency stop device operated by an electric actuator can have a power failure operation function.

[0018] Problems, structures, and effects other than those described above will become more apparent from the following description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a simplified structural diagram of an elevator device according to an embodiment.

[0020] Figure 2 The mechanical part and the electrical device part of the electric actuator in this embodiment are shown in FIG. Figure 1 Top view of the setup state.

[0021] Figure 3 This is a flowchart showing the battery status diagnosis executed by the elevator controller in this embodiment.

[0022] Figure 4 This is a flowchart showing the processing after the battery status diagnosis executed by the elevator controller in this embodiment. DETAILED DESCRIPTION

[0023] Hereinafter, an elevator device according to one embodiment of the present invention will be described based on an embodiment with reference to the drawings. In each figure, components with the same reference numerals represent the same components or components having similar functions.

[0024] Figure 1 This is a schematic structural diagram of an elevator device according to an embodiment of the present invention.

[0025] like Figure 1 As shown, the elevator device includes a car 1, speed sensors (5, 6), an electric actuator 10, a driving mechanism (12-20), an upper pull rod 21, and an emergency stop device 2.

[0026] The car 1 is suspended in a hoistway provided in a building by a main rope (not shown), and the car 1 is slidably engaged with a guide rail 4 by a guide device. If the main rope is frictionally driven by a driving device (traction machine: not shown), the car 1 is raised and lowered in the hoistway.

[0027] The speed sensor in this embodiment is provided on the car 1, and includes a rotation detector 6 and a roller 5 connected to the rotation axis of the rotation detector 6. In this embodiment, the roller 5 is connected to the rotation axis of the rotation detector 6 in such a manner that the rotation axis of the roller 5 is coaxial with the rotation axis of the rotation detector 6. As the rotation detector 6, for example, a rotary encoder can be applied.

[0028] The roller 5 is in contact with the guide rail 4. Therefore, when the car 1 is raised or lowered, the roller 5 rotates, and thus the rotation detector 6 rotates. The safety controller described later monitors the travel speed of the car 1 based on the rotation position signal output by the rotation detector 6 as it rotates.

[0029] An image sensor may be used as the speed sensor. In this case, the position and speed of the car 1 are detected based on image information of the surface state of the guide rail 4 acquired by the image sensor. For example, the speed is calculated based on the moving distance of the image feature within a predetermined time.

[0030] In the present embodiment, the electric actuator 10 is an electromagnetic operator and is arranged on the upper part of the car 1. The electromagnetic operator includes a movable part or a movable rod that is actuated by, for example, a solenoid or an electromagnet. When the speed sensor (5, 6) detects a prescribed overspeed state of the car 1, the electric actuator 10 is actuated. At this time, the upper pull rod 21 is pulled up by the drive mechanism (12-20) mechanically connected to the operating rod 11. As a result, the emergency stop device 2 is in a braking state.

[0031] The driving mechanism (12-20) will be described later.

[0032] The emergency stop device 2 is arranged on each side of the car 1. A pair of brake members (not shown) provided in each emergency stop device 2 is movable between a braking position and a non-braking position, and clamps the guide rail 4 at the braking position. In addition, when the emergency stop device 2 rises relative to the car 1 due to the descent of the car 1, a braking force is generated by the friction force acting between the brake member and the guide rail 4. Therefore, when the car 1 falls into an overspeed state, the emergency stop device 2 is activated to make the car 1 stop urgently.

[0033] The elevator device of this embodiment includes a so-called ropeless speed governor system that does not use a speed governor rope. If the lifting speed of the car 1 exceeds the rated speed and reaches the first overspeed (for example, a speed not exceeding 1.3 times the rated speed), the power supply of the drive device (traction machine) and the power supply of the control device that controls the drive device are cut off. In addition, if the descending speed of the car 1 reaches the second overspeed (for example, a speed not exceeding 1.4 times the rated speed), the electric actuator 10 provided on the car 1 is electrically driven and the emergency stop device 2 is actuated, so that the car 1 is stopped in an emergency.

[0034] In this embodiment, the ropeless speed governor system is composed of the above-mentioned speed sensor (5, 6), and a safety controller that determines the overspeed state of the car 1 based on the output signal of the speed sensor. The safety controller measures the speed of the car 1 based on the output signal of the speed sensor, and when it is determined that the measured speed reaches the first overspeed, it outputs a command signal for cutting off the power supply of the drive device (traction machine) and the power supply of the control device that controls the drive device. In addition, when it is determined that the measured speed reaches the second overspeed, the safety controller outputs a command signal for causing the electric actuator 10 to operate.

[0035] As described above, when the pair of brakes provided in the emergency stop device 2 is pulled up by the upper rod 21, the pair of brakes clamp the guide rail 4. The upper rod 21 is driven by the drive mechanism (12 to 20) connected to the electric actuator 10.

[0036] Next, the structure of the driving mechanism will be described.

[0037] The operating rod 11 of the electric actuator 10 is connected to the first operating member 16 and constitutes a first connecting rod member in a roughly T-shape. The operating rod 11 and the first operating member 16 respectively constitute the head and foot of the T-shape. The first connecting rod member in a roughly T-shape is rotatably supported on the upper beam 50 via the first operating shaft 19 at the connecting portion between the operating rod 11 and the first operating member 16. The end of one of the pair of upper pull rods 21 (the left side in the figure) is connected to the end on the opposite side of the connecting portion between the operating rod 11 and the first operating member 16 in the first operating member 16 as the foot of the T-shape.

[0038] The connecting member 17 and the second actuating member 18 are connected to form a second connecting rod member in a roughly T-shape. The connecting member 17 and the second actuating member 18 respectively form the head and foot of the T-shape. The second connecting rod member in a roughly T-shape is rotatably supported on the upper beam 50 via the second actuating shaft 20 at the connecting portion between the connecting member 17 and the second actuating member 18. The end of the other (left side in the figure) of the pair of upper pull rods 21 is connected to the end on the opposite side of the connecting portion between the connecting member 17 and the second actuating member 18 in the second actuating member 18 as the foot of the T-shape.

[0039] The end of the operating rod 11 extending from the inside to the outside of the housing 30 and the end of the connecting member 17 that is closer to the upper part of the car 1 than the second actuating shaft 20 are respectively connected to one end (left side in the figure) and the other end (right side in the figure) of the drive shaft 12 that spans the car 1. The drive shaft 12 slidably penetrates the fixed portion 14 fixed to the upper beam 50. In addition, the drive shaft 12 penetrates the pressing member 15, and the pressing member 15 is fixed to the drive shaft 12. The pressing member 15 is located on the second link member (connecting member 17, second actuating member 18) side of the fixed portion 14. The drive spring 13, which is an elastic body, is located between the fixed portion 14 and the pressing member 15, and the drive shaft 12 is inserted through the drive spring 13.

[0040] When the electric actuator 10 is actuated, that is, in the present embodiment, when the energization to the electromagnet is cut off, the electromagnetic force for limiting the motion of the operating rod 11 against the force of the drive spring 13 disappears, and therefore, the drive shaft 12 is driven in the longitudinal direction by the force of the drive spring 13 applied to the pressing member 15. Therefore, the first link member (operating rod 11, first operating member 16) rotates around the first operating shaft 19, and the second link member (connecting member 17, second operating member 18) rotates around the second operating shaft 20. Thus, one upper rod 21 connected to the first operating member 16 of the first link member is driven and pulled up, and the other upper rod 21 connected to the second operating member 18 of the second link member is driven and pulled up.

[0041] Figure 2 The mechanical part and the electrical device part of the electric actuator 10 in this embodiment are shown in FIG. Figure 1 Top view of the setup state. Figure 2 The electric actuator 10 shown is Figure 1 stored in the housing 30 ( Figure 3 , 4 Same).

[0042] exist Figure 2 In the same time, the circuit structure for controlling the electrical equipment part is recorded ( Figure 3 , 4 The same applies). Figure 2In the emergency stop device 2 ( Figure 1 ) is in a non-braking state, and the electric actuator 10 is in a standby state. In other words, the elevator device is in a normal operating state.

[0043] like Figure 2 As shown, in the standby state, the movers (34a, 34b, 34c) as the movable components connected to the operating rod 11 are attracted by the electromagnetic force to the electromagnets 35a, 35b excited by the energization of the coil. Figure 1 ) and the operating rod 11 acts on the driving spring 13 ( Figure 1 ) is limited by the force F. Therefore, the electric actuator 10 overcomes the force of the drive spring 13 and limits the drive mechanism (12 to 20: Figure 1 ) action.

[0044] The mover has an adsorption portion 34a adsorbed on the magnetic pole surfaces of the electromagnets 35a and 35b, and a support portion 34b fixed to the adsorption portion 34a and connected to the operating rod 11. The operating rod 11 is rotatably connected to the support portion 34b in the mover via a connecting bracket 38. In the electric actuator 10, a mover detection switch 109 is provided at the position where the adsorption portion 34a of the mover is located during standby.

[0045] The mover also has a cam portion 34c fixed on the adsorption portion 34a. When the mover is in the standby position, the mover detection switch 109 is operated by the cam portion 34c. When the mover detection switch 109 is operated by the cam portion 34c, it changes from the on state to the off state or from the off state to the on state. Therefore, according to the state of the mover detection switch 109, it is possible to detect whether the mover is in the standby position.

[0046] In the present embodiment, the mover detection switch 109 is in the on state when operated by the cam portion 34 c.

[0047] In this embodiment, in the movers (34a, 34b, 34c), at least the attracting portion 34a is made of a magnetic body. As the magnetic body, a soft magnetic body such as low-carbon steel or Permalloy (iron / nickel alloy) is preferably used.

[0048] It will be described later Figure 2 Other institutional departments in (36, 37, 39, 41).

[0049] The electromagnets 35a and 35b are excited by the DC power supply 300 and the battery 111. The DC power supply 300 is composed of a rectifier or a power conversion device that converts the AC power input from the commercial AC power supply 200 into DC power. The DC output of the DC power supply 300 is connected in parallel with the battery 111 via the power supply contact 150. The power supply contact 150 is composed of a contact provided by, for example, an electromagnetic relay, an electromagnetic contactor, an electromagnetic switch, or the like.

[0050] When AC power is supplied from the commercial AC power supply 200, the electromagnets 35a and 35b are mainly excited by the DC power supply 300. At this time, the power supply contact 150 is controlled by the elevator controller 7 to be in a closed state. Thus, the DC power supply 300 excites the electromagnets 35a and 35b and charges the battery 111.

[0051] When the commercial AC power supply 200 fails, the electromagnets 35a and 35b are excited by the battery 111. At this time, the power supply contact 150 is controlled by the elevator controller 7 to be in an open state. This prevents the discharge current from the battery 111 from flowing into the DC power supply 300. The power supply contact 150 is also controlled by the elevator controller 7 when the elevator controller 7 performs a state diagnosis of the battery 111, as described later.

[0052] In the excitation circuit of the electromagnet 35a, one end of the coil of the electromagnet 35a is connected to the high potential side of the battery 111 via the electrical contacts 104a and 105a connected in series and the fuse 107a, and is further connected to the high potential side of the DC output of the DC power supply 300 via the power supply contact 150. In addition, the other end of the coil of the electromagnet 35a is connected to the low potential sides of the battery 111 and the output of the DC power supply.

[0053] In the excitation circuit of the electromagnet 35b, one end of the coil of the electromagnet 35b is connected to the high potential side of the battery 111 via the electrical contacts 104b and 105a connected in series and the fuse 107b, and is further connected to the high potential side of the DC output of the DC power supply 300 via the power supply contact 150. In addition, the other end of the coil of the electromagnet 35b is connected to the low potential sides of the battery 111 and the output of the DC power supply.

[0054] In order to protect the electromagnets 35a and 35b from overcurrent, fuses 107a and 107b are provided in the exciting circuits, respectively.

[0055] The electrical contacts 104a, 105a, 104b, 105b are turned on / off by the safety controller 103. In the standby state of the electric actuator 10, the safety controller 103 controls the electrical contacts 104a, 105a, 104b, 105b to be turned on, respectively. As a result, the coils of the electromagnets 35a, 35b are energized, and thus the electromagnets 35a, 35b generate electromagnetic force.

[0056] The electric contacts 104a, 105a, 104b, 105b are respectively constituted by contacts provided by, for example, an electromagnetic relay, an electromagnetic contactor, an electromagnetic switch, etc. In each excitation circuit of the electromagnet 35a, 35b, a plurality of ( Figure 2 As described later, when the multiple electrical contacts are controlled to be in an open state in order to operate the emergency stop device 2, even if a conduction failure occurs in one contact, the power supply to the electromagnet is cut off. Therefore, the reliability of the operation of the electric actuator 10 is improved. The conduction failure occurs, for example, by welding of the contacts.

[0057] The other electrical equipment parts (37, 112) will be described later. In addition, the signal lines 106a, 106b are used to input the response signals from the respective exciting circuits of the electromagnets 35a, 35b to the safety controller 103.

[0058] The response signal (hereinafter referred to as "response signal (106a)") input to the safety controller 103 via the signal line 106a indicates the potential of one end of the coil of the electromagnet 35a that is connected to the high potential side of the battery 111 and the DC power supply 300 via the electrical contacts 104a and 105a. Therefore, if the electromagnet 35a is energized, the response signal (106a) indicates the potential of the high potential side of the battery 111 and the DC power supply 300 (high potential (HIGH)), and if the electromagnet 35a is not energized, the response signal (106a) indicates the potential of the low potential side of the battery 111 and the DC power supply 300 (low potential (LOW)). Based on the potential indicated by the response signal (106a), the safety controller 103 detects the energized state of the electromagnet 35a.

[0059] The response signal (hereinafter referred to as the response signal (106b)) input to the safety controller 103 via the signal line 106b indicates the potential of one end of the coil of the electromagnet 35b that is connected to the high potential side of the battery 111 and the DC power supply 300 via the electrical contacts 104b and 105b. Therefore, if the electromagnet 35b is energized, the response signal (106b) indicates the potential of the high potential side of the battery 111 and the DC power supply 300 (high potential (HIGH)), and if the electromagnet 35b is not energized, it indicates the potential of the low potential side of the battery 111 and the DC power supply 300 (low potential (LOW)). Based on the potential indicated by the response signal (106b), the safety controller 103 detects the energized state of the electromagnet 35b.

[0060] Next, the operation of the electric actuator 10 when the emergency stop device 2 is operated will be described.

[0061] When the safety controller 103 detects a predetermined overspeed state (the second overspeed described above) of the car 1 based on the rotation position signal from the rotation detector 6, it outputs a disconnection command to the electric contacts 104a, 105a, 104b, 105b respectively. Figure 2 ) is transferred to the disconnected state. Therefore, since the excitation of the electromagnets 35a and 35b stops, the electromagnetic force acting on the movers (34a, 34b, 34c) disappears. As a result, the constraint on the mover caused by the attraction of the attraction portion 34a of the mover by the electromagnets 35a and 35b can be released, so the mover is driven by the force of the drive spring 13 ( Figure 2 F), from the standby position ( Figure 2 ) moves to position P in the direction of the force of the drive spring 13 (right direction in the figure). Figure 2 In the figure, the moved mover is indicated by a double-dotted line.

[0062] As the restraint of the mover is released, the pressing member 15 ( Figure 1 ) received from the fixing portion 14 ( Figure 1 ) toward the pressing member ( Figure 1 ) direction of the drive spring 13 ( Figure 1 ) to drive the drive shaft 12. If the drive shaft 12 is driven, the first link member (operating rod 11 and first action member 16: Figure 1 ) around the first action axis 19 ( Figure 1 ) rotates. As a result, the upper pull rod 21 ( Figure 1 ) is pulled up. In addition, if the drive shaft 12 is driven, the second link member (connecting member 17 and second action member 18: Figure 1 ) around the second action axis 20 ( Figure 1 ) rotates. As a result, the upper pull rod 21 ( Figure 1 ) was pulled up.

[0063] Next, the recovery operation of the electric actuator 10 will be described.

[0064] In order to restore the electric actuator 10 from the operating state to the standby state, as described below, the movable element (34a, 34b, 34c) is moved from the moving position ( Figure 2 position P) returns to the standby position.

[0065] The electric actuator 10 has a feed screw 36 to drive the mover. The feed screw 36 is coaxially connected to the rotation axis of the motor 37 and is rotatably supported by the support member 41. The electromagnets 35a and 35b are fixed to an electromagnet support plate 39 having a feed nut portion (not shown). The feed nut portion of the electromagnet support plate 39 is threadedly engaged with the feed screw 36. The feed screw 36 is rotated by the motor 37. The motor 37 is driven by the motor controller 112.

[0066] The motor controller 112 includes a drive circuit for the motor 37, and controls the rotation of the motor 37 according to a control command from the elevator controller 7. The motor 37 may be any of a DC motor and an AC motor.

[0067] The elevator controller 7 controls the normal operation of the car 1 and has information on the operation state of the car 1. In the present embodiment, the elevator controller 7 also has a function of controlling the motor 37 included in the electric actuator 10 as described above.

[0068] When the electric actuator 10 is restored to the standby state, the elevator controller 7 sends a rotation command of the motor 37 to the motor controller 112. When the motor controller 112 receives the rotation command, it drives the motor 37 to rotate the feed screw 36. The rotation of the motor 37 is converted into a linear movement of the electromagnets 35a and 35b along the axial direction of the feed screw 36 by the rotating feed screw 36 and the feed nut portion of the electromagnet support plate 39. As a result, the electromagnets 35a and 35b approach the moving position P of the movers (34a, 34b, 34c) and abut against the movers.

[0069] The motor controller 112 monitors the motor current to control the motor 37. As described above, when the electromagnets 35a and 35b abut against the mover, the load of the motor 37 increases, so the motor current increases. If the motor current increases and exceeds a specified value, the motor controller 112 determines that the electromagnets 35a and 35b abut against the mover. The motor controller 112 sends the determination result to the safety controller 103 and the elevator controller 7.

[0070] When receiving the determination result from the motor controller 112, the safety controller 103 outputs a conduction command to the electrical contacts 104a, 105a, 104b, 105b, respectively. According to the conduction command, the electrical contacts 104a, 105a, 104b, 105b are transferred from the disconnected state to the conductive state. Therefore, the electromagnets 35a, 35b are excited. The electromagnetic force generated by the excited electromagnets 35a, 35b acts on the adsorption portion 34a in the mover, and is adsorbed by the electromagnets 35a, 35b.

[0071] When receiving the above determination result from the motor controller 112, the elevator controller 7 sends a reverse command of the motor 37 to the motor controller 112. When the motor controller 112 receives the reverse command, it reverses the rotation direction of the motor 37 and reverses the feed screw 36. As a result, the mover attracted by the electromagnets 35a and 35b moves to the standby position together with the electromagnets 35a and 35b while receiving the force of the drive spring 13.

[0072] The cam portion 34c provided in the movable member (34a, 34b, 34c) is operated by the electric actuator 10, and the movable member (34a, 34b, 34c) moves to the position P ( Figure 3 ), until the electric actuator 10 is about to complete the recovery action, it is separated from the mover detection switch 109. Therefore, at this time, the mover detection switch 109 is in an off state.

[0073] When the mover (34a, 34b, 34c) attracted by the electromagnets 35a and 35b reaches the standby position, the mover detection switch 109 is operated by the cam portion 34c of the mover. When the mover detection switch 109 is operated, the elevator controller 7 determines that the mover is in the standby position. Based on the determination result, the elevator controller 7 sends a stop command of the motor 37 to the motor controller 112. When receiving the stop command, the motor controller 112 stops the rotation of the motor 37.

[0074] As described later, during the operation of the elevator device, when there is no registered call and the car 1 is in a standby state at one floor, the elevator controller 7 performs a state diagnosis of the battery 111. The elevator controller 7 sets the power supply contact 150 to the disconnected state, stops the excitation of the electromagnets 35a and 35b based on the DC power supply 300, and excites the electromagnets 35a and 35b through the battery 111. When the elevator controller 7 can continue to excite the battery 111 within a specified time, it is diagnosed that the battery 111 is normal. At this time, if the elevator controller 7 determines that the mover is continuously attracted by the electromagnets 35a and 35b within the specified time, and the conduction state of the mover detection switch 109 is maintained, it is diagnosed that the battery 111 is normal.

[0075] Figure 3 This is a flowchart showing the state diagnosis of the battery 111 executed by the elevator controller 7 in this embodiment.

[0076] When the elevator controller 7 starts the process, first, in step S301, it is determined whether the power supply contact 150 ( Figure 2 ) Whether a predetermined period of time t1 or more has passed since the disconnection. t1 is arbitrarily set in consideration of the interval for diagnosis of other elevator equipment, etc. For example, t1 is set to 30 days.

[0077] The elevator controller 7 executes step S301 when the car 1 is stopped and no call is registered, that is, when the car 1 is in a standby state.

[0078] When the elevator controller 7 determines that the time has elapsed for more than t1 ("Yes" in step S301), step S302 is then executed. When it determines that the time has not elapsed for more than t1 ("No" in step S301), a series of processing is terminated.

[0079] In step S302, the elevator controller 7 determines whether the standby state has continued for a predetermined time t2. t2 is arbitrarily set in consideration of the standby state duration that can be estimated as an elevator utilization condition where service is not reduced even when the battery 111 status diagnosis is performed. For example, t2 is set to 10 minutes.

[0080] When the elevator controller 7 determines that the condition has continued for more than t2 ("Yes" in step S302), step S303 is then executed. When the elevator controller 7 determines that the condition has not continued for more than t2 ("No" in step S302), step S302 is executed again.

[0081] In step S303, the elevator controller 7 disconnects the power supply contact 150. As a result, the electromagnets 35a and 35b in the electric actuator 10 are electrically isolated from the DC power supply 300 and are excited only by the battery 111. That is, the excited state of the electromagnets 35a and 35b during a power outage is simulated. After executing step S303, the elevator controller 7 then executes step S304.

[0082] In step S304, the elevator controller 7 determines whether the actuator detection switch 109 ( Figure 2 ) is in the disconnected state. The disconnected state of the mover detection switch 109 indicates that the electromagnets 35a and 35b are excited by the battery 111, and the movers (34a, 34b, 34c) ( Figure 2 ) cannot remain in the standby position, the mover moves to Figure 2 Position P.

[0083] When the elevator controller 7 determines that the actuator detection switch 109 is in the disconnected state (step S304 is "yes"), it then executes step S306. When it is determined that it is not in the disconnected state (step S304 is "no"), that is, when it is determined to be in the conductive state, it measures the elapsed time (initial value = 0) from the moment when the power supply contact 150 is cut off (step S303), and then executes step S305.

[0084] In step S305, the elevator controller 7 determines whether a predetermined time t3 has passed after the power supply contact 150 is cut off based on the measured value of the elapsed time. The predetermined time t3 is set in consideration of the power supply time required for the electromagnets 35a and 35b of the storage battery 111 during a power outage. The power supply time is, for example, the time until the car stops when a power outage occurs during the car traveling at the maximum speed. For example, t3 is set to 3 minutes.

[0085] When the elevator controller 7 determines that the predetermined time t3 has passed ("Yes" in step S305), step S306 is then executed. When it is determined that the predetermined time t3 has not passed ("No" in step S305), step S304 is executed again.

[0086] In step S306, the elevator controller 7 turns on the power supply contact 150. As a result, the electromagnets 35a and 35b are excited by the DC power supply 300 regardless of the state of the battery 111. After executing step S306, the elevator controller 7 executes step S307.

[0087] In step S307, the elevator controller 7 stores the time when the power supply contact 150 is cut off (hereinafter referred to as "cut-off time (t)"). As described above, when the elevator controller 7 determines in step S304 that the mover detection switch 109 is not in the disconnected state (step S304 is "No"), that is, when it is determined to be in the conductive state, the elapsed time (initial value = 0) from the moment when the power supply contact 150 is cut off (step S303) is measured. The measured value of the elapsed time is stored as the cut-off time (t).

[0088] After executing step S307, the elevator controller 7 executes step S308.

[0089] In step S308, the elevator controller 7 determines whether the mover detection switch 109 is in the off state. When the elevator controller 7 determines that it is in the off state (step S308: Yes), step S309 is then executed.

[0090] In step S309, the elevator controller 7 issues a command to the motor controller 112 to drive the motor 37 of the electric actuator 10, so that the electromagnets 35a and 35b move, the mover is attracted to the electromagnets 35a and 35b, and the motor 37 rotates forward and reverse to restore the mover to the standby position. When step S309 is executed, the elevator controller 7 ends a series of processing.

[0091] When the elevator controller 7 determines in step S308 that the mover detection switch 109 is not in the off state (step S308 is "No"), that is, when it is determined to be in the on state, since the mover is in the standby position, step S309 is skipped and a series of processing is ended.

[0092] Figure 4 It means that the elevator controller in this embodiment executes Figure 3 Flowchart of the process after the state diagnosis of the battery 111 is shown.

[0093] In step S401, the elevator controller 7 determines whether the disconnection time (t) of the power supply contact 150 is less than the above-mentioned prescribed time t3. When the elevator controller 7 determines that it is less than the prescribed time t3 (step S401 is "yes"), step S402 is then executed. When it is determined that it is not less than the prescribed time t3 (step S401 is "no"), since the battery 111 is in a normal state, a series of processes are terminated.

[0094] In step S402, the elevator controller 7 determines whether the disconnection time (t) of the power supply contact 150 is less than the specified time t4. Here, the specified time t4 is a time shorter than t3. For example, t3 is set to 3 minutes, and t2 is set to 5 seconds. In order to distinguish the degree of abnormal state of the battery 111, t2 and t3 are set.

[0095] When the elevator controller 7 determines that the cut-off time is less than the specified time t2 (step S402 is "Yes"), step S403 is executed next. When it is determined that the cut-off time is not less than the specified time t3 (step S402 is "No"), step S404 is executed next.

[0096] In step S403, since the disconnection time is shorter than t4, the battery capacity is considered lost, and the elevator controller 7 reports the battery capacity loss to an external person such as a maintenance engineer or a maintenance company. After executing step S403, the elevator controller 7 executes step S405.

[0097] In step S404, since the cut-off time (t) is not less than t4 but less than t3 and is relatively short (t2≤t<t3), it is assumed that the battery capacity is reduced, and the elevator controller 7 reports the battery capacity reduction to the outside, such as a maintenance technician or a maintenance company. After executing step S404, the elevator controller 7 ends a series of processing.

[0098] In step S405, the elevator controller 7 determines whether the target floor below the current position of the car is registered. When the elevator controller 7 determines that it has been registered (step S405 is "yes"), step S406 is then executed. When it is determined that it has not been registered (step S405 is "no"), a series of processing is terminated.

[0099] In step S406, the elevator controller 7 limits the speed of the car during descending operation to a low speed V L . V L Lower than the rated speed, for example, set to 60m / min.

[0100] Here, even if the low-speed descending operation is possible and the emergency stop device is activated, the elevator controller 7 ends a series of processing when executing step S406.

[0101] According to the above embodiment, the elevator device having the emergency stop device 2 operated by the electric actuator 10 can have a power failure operation function. Furthermore, by having a state diagnosis function of the battery 111 that supplies power to the electric actuator 10 during a power failure, maintenance work can be performed quickly or accurately. Thus, the reliability of the power failure operation function of the electric actuator can be maintained.

[0102] In addition, according to the above-mentioned embodiment, the state diagnosis of the battery 111 is performed by the elevator controller 7 cutting off the power supply contact 150 to set it to the disconnected state, stopping the excitation of the electromagnets 35a and 35b by the DC power supply 300, and exciting the electromagnets 35a and 35b by the battery 111. When the elevator controller 7 can continue the excitation based on the battery 111 within a specified time, it is diagnosed that the battery 111 is normal. At this time, if the elevator controller 7 determines that the mover is continuously attracted by the electromagnets 35a and 35b within the specified time, and the conduction state of the mover detection switch 109 is maintained, it is diagnosed that the battery 111 is normal.

[0103] Thus, in this embodiment, power is supplied from the battery 111 to the electric actuator 10 as in the case of a power outage, so that the electric actuator is kept in a standby state. That is, the position of the mover of the electric actuator is kept in the standby position. Then, the state of the battery 111 is diagnosed based on the time that the standby state can be maintained. Therefore, according to this embodiment, it is possible to diagnose with high accuracy whether the battery 111 is in an appropriate state for the operation function of the electric actuator 10 during a power outage.

[0104] In addition, since the elevator controller 7 determines the diagnosis execution time, the diagnosis is executed by controlling the electric actuator or the power supply contact in the same manner as during a power outage. Therefore, during the operation of the elevator device, the state of the battery 111 can be automatically diagnosed regardless of the operation of the maintenance technician.

[0105] The present invention is not limited to the above-mentioned embodiments, but also includes various modifications. For example, the above-mentioned embodiments are detailed descriptions for the purpose of explaining the present invention in an understandable manner, and the present invention is not necessarily limited to including all the structures described. In addition, for a part of the structure of the embodiment, other structures can be added, deleted, or replaced.

[0106] For example, other position detection sensors such as a photoelectric position sensor, a magnetic position sensor, a proximity sensor (capacitive type, inductive type), etc. may be used instead of the mover detection switch 109 .

[0107] Furthermore, the electric actuator 10 may be provided not only in the upper portion of the car 1 but also in the lower portion or the side portion.

[0108] Furthermore, the elevator apparatus may include a machine room, or may be a so-called machine-room-less elevator that does not include a machine room.

[0109] Description of symbols

[0110] 1…car, 2…emergency stop device, 4…guide rail, 5…roller, 6…rotation detector, 7…elevator controller, 10…electric actuator, 11…operating lever, 12…drive shaft, 13…drive spring, 14…fixing portion, 15…pressing member, 16…first actuating member, 17…connecting member, 18…second actuating member, 19…first actuating shaft, 20…second actuating shaft, 21…upper rod, 30…housing, 34a…adsorption portion, 34b…support portion, 34c…cam portion, 35a, 35b …electromagnet, 36…feed screw, 37…motor, 38…connecting bracket, 39…electromagnet support plate, 41…support member, 50…upper beam, 103…safety controller, 104a, 105a, 104b, 105b…electrical contacts, 106a, 106b…signal line, 107a, 107b…fuse, 109…motor detection switch, 111…battery, 112…motor controller, 150…power supply contact, 200…commercial AC power supply, 300…DC power supply.

Claims

1. An elevator device, comprising: Car; An emergency stop device provided on the car; A driving mechanism for driving the emergency stop device; an electric actuator for causing the drive mechanism to operate; as well as a controller for controlling the operation of the car, The elevator device is characterized in that The electric actuator comprises: A mover mechanically connected to the drive mechanism; and an electromagnet opposite to the mover, The elevator device includes: a DC power supply connected to the electromagnet via a power supply contact to excite the electromagnet; and a battery connected to the electromagnet, The controller cuts off the power supply contact when a power outage occurs, and when the power supply contact is cut off, the battery excites the electromagnet.

2. The elevator device according to claim 1, characterized in that: When diagnosing the state of the battery, the controller cuts off the power supply contact, measures the time the position of the mover is maintained at the standby position, and diagnoses the state of the battery based on the measured time.

3. The elevator device according to claim 2, characterized in that: The electric actuator includes a position detector that detects that the mover is located at the standby position. The controller measures the time during which the position of the mover is maintained at the standby position by measuring the time during which the position detector detects the mover after the power supply contact is cut off.

4. The elevator device according to claim 2, characterized in that: After measuring the time for which the position of the mover is maintained at the standby position, the controller turns on the power supply contact. The electromagnet is excited by the DC power supply.

5. The elevator device according to claim 3, characterized in that: The electric actuator includes a return mechanism for returning the mover moved from the standby position to the standby position. After measuring the time for which the position of the mover is maintained at the standby position, the controller turns on the power supply contact. The electromagnet is excited by the DC power supply, The return mechanism returns the mover to the standby position when the position detector does not detect the mover.

6. The elevator device according to claim 1, characterized in that: The controller determines a time to diagnose the state of the battery, and after determining the time, diagnoses the state of the battery in a standby state of the car.

7. The elevator device according to claim 1, characterized in that: The controller sets the speed of the car during descending operation to a speed lower than a rated speed when determining that the diagnosed state of the battery is a capacity loss state.

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