Elevator equipment

Abstract

The present invention discloses an elevator device having an emergency stop device capable of improving the reliability of the operation of an electric operator. The elevator device includes a car; an emergency stop device provided in the car; and an electric operator (10) provided in the car for operating the emergency stop device. The electric operator includes an electromagnet (35), an operating rod (11) for operating the emergency stop device in conjunction with the operation of the electromagnet, an armature (34) connected to the operating rod, a linear actuator (40) capable of being driven by a motor (45) to linearly move the electromagnet, and a motor drive control unit (301) for controlling the drive of the motor. The motor drive control unit controls the drive of the motor based on the motor current flowing in the motor, so that the electromagnet moves to the position of the armature after the emergency stop device is operated to attract the armature, and then moves the electromagnet to return the armature to the standby position.

Description

Technical Field

[0001] The present invention relates to an elevator system having an emergency stop device operated by an electric operator. Background Art

[0002] Elevator systems are equipped with speed governors and emergency stop devices to monitor the car's speed and bring it to an emergency stop if it exceeds a specified speed limit. Typically, the car and speed governor are connected via a speed governor cable. When an overspeed condition is detected, the speed governor secures the speed governor cable, activating the car's emergency stop device and bringing the car to an emergency stop.

[0003] In such elevator equipment, in the hoistway, lay the speed governor rope as a longer object, so it is difficult to save space and reduce costs. In addition, when the speed governor rope shakes, the structure in the hoistway and the speed governor rope interfere easily.

[0004] In response to this, an emergency stop device that does not use a speed governor rope is proposed.

[0005] As a prior art for an emergency stop device that does not use a speed governor cable, the technology described in Patent Document 1 is known. In this prior art, brake units having wedge-shaped brake shoes are installed at two locations below the car, and brake links are connected to the brake shoes. The two brake links are connected to each other via a connecting portion, and the brake shoes are moved up and down in a coordinated manner to apply and release the brakes.

[0006] A locking mechanism is installed on one side of the brake unit to lock the brake link when braking is not in effect, or to unlock it when the brakes are applied. When the solenoid in the locking mechanism operates in response to a command from the control unit, a mechanism linked to the solenoid momentarily moves the brake link upward using the elastic energy of the released spring. This pulls the brake shoe upward, braking the car.

[0007] A return unit is installed on the other brake unit side to restore the emergency stop device to its normal state. The return unit's linear actuator is driven, and a mechanism linked to the linear actuator applies force to the torsion spring. In this state, when the car is slightly raised in response to a command from the control unit, the brake shoe is disengaged from the guide rail and pulled downward by the linkage mechanism, which is biased by the torsion spring.

[0008] Prior art literature

[0009] Patent Literature

[0010] Patent Document 1: Japanese Patent Application Laid-Open No. 2013-189283 Summary of the Invention

[0011] Problems to be solved by the invention

[0012] As described above, in the conventional emergency stop device operated by the electric operator, the structure of the operating mechanism is complicated.

[0013] Therefore, the present invention provides an elevator apparatus having an emergency stop device capable of suppressing complication of an operating mechanism and improving reliability of operation while being operated by an electric operator.

[0014] Technical solutions to problems

[0015] In order to solve the above-mentioned problems, an elevator device of the present invention includes: a car; an emergency stop device provided in the car; and an electric operator provided in the car, which activates the emergency stop device, the electric operator including: an electromagnet; an operating rod that operates the emergency stop device in conjunction with the action of the electromagnet; an armature connected to the operating rod; a linear actuator that can be driven by an electric motor to move the electromagnet in a straight line; and a motor drive control unit that controls the drive of the motor, the motor drive control unit controls the drive of the motor based on the motor current flowing in the motor, so that the electromagnet moves to the position of the armature after the emergency stop device is activated to attract the armature, and then moves the electromagnet to return the armature to the standby position.

[0016] Effects of the Invention

[0017] According to the present invention, the reliability of the operation of the electric operating device can be improved without complicating the operating mechanism for operating the emergency stop device.

[0018] Problems, structures, and effects other than those described above will be explained through the following description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of the elevator equipment according to the embodiment.

[0020] Figure 2 1 is a diagram showing the main structure of the mechanism portion of the electric operating device in the embodiment.

[0021] Figure 3 This is a diagram showing the configuration of the main parts of the electric operating device in the embodiment, showing the recovery operation.

[0022] Figure 4 This is a waveform diagram showing the temporal change of the motor current during the recovery operation of the electric operating device according to the embodiment.

[0023] Figure 5 This is a flowchart showing the control operation of the motor drive control unit in the embodiment. DETAILED DESCRIPTION

[0024] Hereinafter, an elevator system according to an embodiment of the present invention will be described by way of example with reference to the accompanying drawings. In the drawings, the same reference numerals denote the same components or components having similar functions.

[0025] Figure 1 This is a schematic structural diagram of an elevator apparatus according to one embodiment of the present invention.

[0026] A car 1 that moves between multiple floors in a hoistway formed in a building is connected to a counterweight 101 via a main rope 102. The main rope 102 is wound around a deflector pulley 103 and a sheave 202 included in a hoisting machine 200. Thus, the car 1 and the counterweight 101 are suspended by the main rope 102 in the hoistway.

[0027] When the main rope 102 is driven by rotating the sheave 202 using the motor 201 included in the hoisting machine 200, the car 1 and the counterweight 101 move in opposite directions in the vertical direction within the hoistway. The motor 201 (e.g., a permanent magnet synchronous motor) is driven by power supplied from a power converter (e.g., an inverter device) not shown in the figure included in the elevator control device 300. When the motor 201 stops the car 1, it is braked by the brake device 203 included in the hoisting machine 200.

[0028] like Figure 1 As shown, the car 1 includes an electric operator 10 , a drive mechanism ( 12 ˜ 18 ), a lifting rod 21 , and an emergency stop device 2 .

[0029] As described above, the car 1 is suspended by the main rope 102 in the hoistway and slidably engaged with the guide rail 4 via the guide device. When the main rope 102 is frictionally driven by the hoisting machine 200, the car 1 is guided by the guide rail 4 and moves up and down in the hoistway.

[0030] In this embodiment, the electric operator 10 is an electromagnetic operator and is arranged on the upper part of the car 1. The electromagnetic operator has a movable piece or movable rod operated by a solenoid or an electromagnet, for example. The electric operator 10 is activated when the car 1 reaches a predetermined overspeed state. At this time, the lifting rod 21 is lifted by the drive mechanism (12 to 18) connected to the operating rod 11. As a result, the emergency stop device 2 is put into a braking state. The drive mechanism (12 to 18) will be described later.

[0031] An emergency stop device 2 is provided on each side of the car 1. Each emergency stop device 2 includes a pair of brake members (not shown) that are movable between a braking position and a non-braking position. In the braking position, they clamp the guide rails 4. Furthermore, when the car 1 rises relative to the ground due to descent, a braking force is generated due to the friction between the brake members and the guide rails 4. Thus, the emergency stop device 2 is activated when the car 1 overspeeds, causing the car 1 to stop urgently.

[0032] The elevator apparatus of this embodiment has a so-called ropeless speed governor system that does not use a speed governor rope. When the raising and lowering speed of the car 1 exceeds the rated speed and reaches a first overspeed (e.g., a speed not exceeding 1.3 times the rated speed), the power supply to the traction machine 200 is cut off and the brake device 203 is activated. In addition, when the descending speed of the car 1 reaches a second overspeed (e.g., a speed not exceeding 1.4 times the rated speed), the electric operator 10 provided on the car 1 is activated, causing the emergency stop device 2 to operate, causing the car 1 to stop urgently.

[0033] In this embodiment, the ropeless speed governor system comprises a position sensor (not shown) for detecting the position of the car 1 within the hoistway, and a safety control device (not shown) for determining an overspeed condition of the car 1 based on an output signal from the position sensor. The safety control device measures the speed of the car 1 based on the output signal from the position sensor, and when it determines that the measured speed has reached a first overspeed, it outputs a command signal for shutting off the power supply to the hoisting machine 200. Furthermore, when it determines that the measured speed has reached a second overspeed, the safety control device outputs a command signal for activating the electric operator 10.

[0034] As the position sensor, for example, an image sensor provided on the car 1 is used. The position and speed of the car 1 are detected based on image information of the surface condition of the guide rail 4 acquired by the image sensor. In this case, the position of the car 1 is detected by comparing image information of the surface condition of the guide rail 4 measured in advance and stored in a storage device with image information acquired by the image sensor.

[0035] Furthermore, as the position sensor, a rotary encoder provided in the car 1 and rotating as the car 1 moves may be used.

[0036] As described above, when the pair of brake members included in the emergency stop device 2 is lifted by the lifting rod 21, the pair of brake members clamp the guide rail 4. The lifting rod 21 is driven by the driving mechanism (12 to 18) connected to the electric operator 10.

[0037] The structure of the driving mechanism will be described below.

[0038] The operating rod 11 of the electric operator 10 is connected to the first working piece 16 to form a first connecting rod component that is roughly T-shaped. The operating rod 11 and the first working piece 16 respectively form the head and foot of the T. The roughly T-shaped first connecting rod component is connected to the first working shaft ( Figure 1 Not shown in the figure, refer to Figure 2The first working piece 16 ("19") is rotatably supported by the upper beam 50. The end of one of the pair of lifting rods 21 (the left side in the figure) is connected to the end of the first working piece 16 on the opposite side of the connection between the operating rod 11 and the first working piece 16, which serves as the leg of the T.

[0039] The connecting piece 17 and the second working piece 18 are connected to form a second, roughly T-shaped link member. The connecting piece 17 and the second working piece 18 respectively form the head and foot of the T. The roughly T-shaped second link member is rotatably supported by the upper beam 50 via a second working shaft (not shown) at the connection between the connecting piece 17 and the second working piece 18. The end of the other (right side in the figure) of the pair of lifting rods 21 is connected to the end of the second working piece 18, which serves as the foot of the T, on the opposite side from the connection between the connecting piece 17 and the second working piece 18.

[0040] The end of the operating rod 11 and the end of the connecting piece 17 that is closer to the upper part of the car 1 than the second working shaft (not shown) 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 mounted on the car 1. The drive shaft 12 slidably passes through the fixed portion 14 fixed to the upper beam 50. In addition, the drive shaft 12 passes through the pressing component 15, and the pressing component 15 is fixed to the drive shaft 12. In addition, the pressing component 15 is located on the side of the second connecting rod component (connecting piece 17, second working piece 18) of the fixed portion 14. The drive spring 13 (compression spring) as an elastic body is located between the fixed portion 14 and the pressing component 15, and the drive shaft 12 is inserted into the drive spring 13.

[0041] When the electric operator 10 is working, that is, in this embodiment, the electromagnet ( Figure 1 Not shown in the figure. Figure 2 When the power supply of the first link member (operating rod 11, first operating piece 16) is cut off, the electromagnetic force that limits the movement of the operating rod 11 against the force of the driving spring 13 disappears, so the driving shaft 12 is driven in the longer direction due to the force of the driving spring 13 applied to the pressing member 15. Therefore, the first link member (operating rod 11, first operating piece 16) moves around the second operating axis ( Figure 2 The second link member (connecting piece 17, second working piece 18) rotates, and the second link member (connecting piece 17, second working piece 18) rotates about the second working axis (not shown). As a result, one lifting rod 21 connected to the first working piece 16 of the first link member is driven and lifted, and the other lifting rod 21 connected to the second working piece 18 of the second link member is driven and lifted.

[0042] In addition, if Figure 1 As shown, the elevator control device 300 includes: when the electric operator 10 is restored to the recovery state after the emergency stop device 2 is operated, the electric motor (reference Figure 2 The motor drive control unit 301 and the motor current measuring unit 302 are described later.

[0043] Figure 2 This is a diagram showing the main structure of the mechanism portion of the electric operating device 10 in this embodiment. Figure 1 Front view of the setup state. Figure 2 In the present embodiment, the emergency stop device is in a non-operating state and the electric operator 10 is in a standby state. That is, the elevator equipment is in a normal operating state.

[0044] like Figure 2 As shown, the operating rod 11 is rotatably connected to an armature bracket 38 provided on the armature 34. In the standby state, the armature 34 connected to the operating rod 11 is attracted by the energized electromagnet 35. This restricts the movement of the operating rod 11 against the force of the drive spring 13. Furthermore, at least the portion of the armature 34 that is attracted to the electromagnet 35 is formed of a magnetic material, preferably a soft magnetic material.

[0045] The operating rod 11 is rotatably connected to an armature holder 38 provided on the armature 34 .

[0046] When the excitation of the electromagnet 35 is stopped in response to a command from a safety control device (not shown), the attractive force acting on the armature 34 disappears. As a result, the electromagnetic restraint of the armature 34 is released, and the drive shaft 12 is driven by the force of the drive spring 13. The armature 34 is not mechanically connected to the return mechanism (35, 40, 45) described later and is mechanically free relative to the return mechanism.

[0047] When the drive shaft 12 is driven, the operating rod 11 connected to the drive shaft 12 rotates around the first working shaft 19, and the first working piece 16 connected to the operating rod 11 rotates around the first working shaft 19 in conjunction with it. As a result, the lifting rod 21 connected to the first working piece 16 is lifted. When the lifting rod 21 is lifted, the emergency stop device 2 ( Figure 2 A pair of wedge-shaped brake members (only brake members are recorded in the figure) possessed by the brake members are lifted. In addition, the emergency stop device in this embodiment is a known technology.

[0048] When the operating rod 11 rotates as described above, the armature 34 connected to the operating rod 11 moves along the rotation direction of the operating rod 11. Therefore, in order to restore the electric operator 10 to the standby state, the armature 34 is moved from the position after the emergency stop operation (refer to the position shown in FIG. Figure 3 ) to return to the standby position.

[0049] In this embodiment, the return mechanism includes a motor 45 and an electric linear actuator 40 driven by the motor 45. When the motor 45 is rotated, the electric linear actuator 40 linearly moves the electromagnet 35. In this embodiment, a DC motor (e.g., a DC servo motor) is used as the motor 45.

[0050] The electric linear actuator 40 includes, for example, a feed screw rotated by a motor 45. In this case, the electromagnet 35 includes a screw component having a threaded hole that screws into the feed screw. The rotating feed screw and the screw component of the electromagnet 35 convert the rotation of the motor 45 into linear movement of the electromagnet 35 along the axial direction of the feed screw.

[0051] By moving the electromagnet 35, which has been in its standby position after the emergency stop, to the position of the armature 34 using the electric linear actuator 40, and then attracting the armature 34 to the electromagnet 35, the armature 34 is moved to its standby position. In this embodiment, the motor drive control unit 301 controls the motor 45 based on the motor current measured by the motor current measuring unit 302. This controls the movement of the electromagnet 35 by the electric linear actuator 40.

[0052] Figure 3 1 is a diagram showing the configuration of the main parts of the electric operating device 10 in this embodiment, showing the recovery operation.

[0053] During the emergency stop operation, the armature 34 moves from the standby position (reference Figure 2 ) to the position during the action ( Figure 3 ) moves. At this time, the electromagnet 35 stays at the standby position (solid line) in order to resume the operation until the motor 45 starts to rotate.

[0054] When the motor 45 rotates, the electromagnet 35 moves linearly toward the armature 34 via the electric linear actuator 40. When the electromagnet 35 reaches the position of the actuated armature 34 (dashed line), it pushes the armature 34 and attracts the armature 34 with electromagnetic force (restoration operation A).

[0055] After the electromagnet 35 attracts the armature 34, when the motor 45 rotates in the reverse direction, the electromagnet 35 moves to the standby position while still attracting the armature 34 (returning operation B) through the electric linear actuator 40. As a result, the armature 34 moves to the standby position.

[0056] In this embodiment, the excitation of the electromagnet 35 is resumed as the motor 45 starts rotating. However, the present invention is not limited thereto and the excitation may be resumed just before or after the electromagnet 35 reaches the position after the armature 34 is actuated.

[0057] like Figure 3 As shown by the middle arrow (B), in conjunction with the recovery action B of the electric operator 10, the lifting rod 21, the first working piece 16, the drive shaft 12 and other mechanical parts also return to the standby position, and the emergency stop device 2 and the driving mechanism (12~18) of the emergency stop device also return to the standby state.

[0058] Figure 4 1 is a waveform diagram showing temporal changes in the motor current I of the electric motor 45 during the recovery operation of the electric operating device 10 of this embodiment. The vertical axis represents the motor current I, and the horizontal axis represents time t.

[0059] The motor current is measured by the motor current measuring unit 302 using a current sensor such as a shunt resistor or a CT (current transformer).

[0060] In the recovery operation A, the motor drive control unit 301 controls the motor current so that the electromagnet moves at a predetermined moving speed. Therefore, a substantially constant value of the motor current ( Figure 4 The current is kept constant until the electromagnet 35 reaches the position of the armature 34 and contacts the armature 34.

[0061] When the electromagnet 35 reaches the position of the armature 34 and pushes the armature 34, the load of the motor 45 increases, so the motor drive control unit 301 increases the motor current ( Figure 4 The motor current exceeds the specified threshold ( Figure 4 When the "armature position detection threshold" in the figure is reached, the motor drive control unit 301 determines that the electromagnet 35 has reached the position of the armature 34, cuts off the motor current, and temporarily stops the motor 45.

[0062] Next, in the recovery operation B, the motor drive control unit 301 restarts the rotation of the motor 45. At this time, the motor drive control unit 301 rotates in the opposite direction to the recovery operation A ( Figure 4 A motor current (in the negative direction) flows through the motor 45. That is, the motor drive control unit 301 rotates the motor 45 in the opposite direction to that in the case of the recovery operation A. As a result, the electromagnet 35 and the armature 34 attracted to the electromagnet 35 move to the standby position.

[0063] In the recovery action B, as the drive spring 13 (refer to Figures 1 to 3) is compressed, and the load on the motor 45 gradually increases. Therefore, the motor current flowing to the motor 45 by the motor drive control unit 301 gradually increases. When the armature 34 reaches the predetermined standby position, the movement of the armature 34 and the mechanism mechanically connected to the armature 34 stops, and the load on the motor 45 increases sharply. The motor current exceeds the predetermined threshold value ( Figure 4 When the “standby position detection threshold value” in FIG. 1 is reached, the motor drive control unit 301 determines that the electromagnet 35 and the armature 34 have reached the standby position.

[0064] When the motor drive control unit 301 determines that the electromagnet 35 and the armature 34 have reached the standby position, the motor current ( Figure 4 The “standby position current” in the current flown in the motor 45.

[0065] In this embodiment, the motor 45 is driven and controlled based on this motor current, thereby accurately returning the armature 34 to its standby position. This allows the electric operator 10 and the drive mechanism of the emergency stop device linked thereto to reliably return to the standby state. This improves the reliability of the electric operator's operation without complicating its structure.

[0066] Figure 5 1 is a flowchart showing the control operation of the motor drive control unit 301 in this embodiment.

[0067] In addition, in this embodiment, the motor drive control unit 301 includes a microcomputer, and the microcomputer executes a predetermined program, whereby the motor drive control unit 301 performs control operations.

[0068] When the process starts, in step S1, the motor drive control unit 301 starts forward rotation of the motor 45. Here, forward rotation refers to the rotation of the electromagnet 35 to move to the position of the armature 34 after the emergency stop operation. Furthermore, reverse rotation, described later, refers to the rotation of the motor 45 to return the electromagnet 35 and the armature 34 attracted to the electromagnet to the standby position.

[0069] Next, in step S2 , the motor drive control unit 301 starts measuring the elapsed time from the start of forward rotation of the motor 45 using the timer.

[0070] Next, in step S3 , the motor drive control unit 301 starts measuring the motor current using the motor current measuring unit 302 .

[0071] Next, in step S4, the motor drive control unit 301 determines whether the measured value of the motor current is within a predetermined threshold value ( Figure 4 The motor drive control unit 301 determines whether the electromagnet 35 has reached the position of the armature 34 as described above in step S4. If the motor drive control unit 301 determines that the position is above the threshold (yes in step S4), the motor drive control unit 301 proceeds to step S5. If the motor drive control unit 301 determines that the position is below the threshold (no in step S4), the motor drive control unit 301 proceeds to step S21 (described later).

[0072] In step S5 , the motor drive control unit 301 determines that the electromagnet 35 has reached the position of the armature 34 , and cuts off the motor current, thereby terminating the forward rotation of the motor 45 .

[0073] Next, in step S6, the motor drive control unit 301 ends the time measurement started in step S2. In addition, steps S1 to S6 correspond to the above-mentioned recovery action A ( Figure 4 ).

[0074] Next, in step S7 , the motor drive control unit 301 starts reverse rotation of the motor 45 .

[0075] Next, in step S8 , the motor drive control unit 301 starts measuring the elapsed time from the start of reverse rotation of the motor 45 using the timer.

[0076] Next, in step S9 , the motor drive control unit 301 starts measuring the motor current using the motor current measuring unit 302 .

[0077] Next, in step S10, the motor drive control unit 301 calculates the temporal change amount of the motor current ( Figure 4 The slope of the current (change over time) when moving in the direction of the standby position).

[0078] Next, in step S11, the motor drive control unit 301 determines whether the temporal change in the motor current calculated in step S10 is greater than a predetermined threshold. As described above, when the electromagnet 35, which attracts the armature 34, returns to its standby position, the load applied to the motor 45 increases, causing the motor current to increase. Therefore, based on step S11, the motor drive control unit 301 can determine that the armature 34 is reliably attracted by the electromagnet 35.

[0079] When the motor drive control unit 301 determines that the time-varying amount of the motor current is above the prescribed threshold value (Yes in step S11), it proceeds to step S12; when it determines that the time-varying amount of the motor current does not reach the prescribed threshold value (No in step S11), it proceeds to step S23 (described later).

[0080] In step S12, the motor drive control unit 301 determines whether the measured value of the motor current is within a predetermined threshold value ( Figure 4 The motor drive control unit 301 determines whether the electromagnet 35 and the armature 34 attracted to the electromagnet 35 have reached the standby position as described above in step S12. If the motor drive control unit 301 determines that the position is above the threshold (Yes in step S12), the motor drive control unit 301 proceeds to step S13. If the motor drive control unit 301 determines that the position is below the threshold (No in step S12), the motor drive control unit 301 proceeds to step S24 (described later).

[0081] In step S13, the motor drive control unit 301 determines that the electromagnet 35 and the armature 34 have reached the standby position, and stops the forward rotation of the motor 45. In order to keep the positions of the electromagnet 35 and the armature 34 at the standby position, the motor current ( Figure 4 The “standby position current” in the PWM output flows.

[0082] Next, in step S14 , the motor drive control unit 301 ends the time measurement started in step S8 .

[0083] Next, in step S15, the motor drive control unit 301 ends the measurement of the motor current started in step S9. In addition, steps S7 to S12 correspond to the above-mentioned recovery operation B ( Figure 4 ).

[0084] When the motor drive control unit 301 executes step S15 , a series of processes ends.

[0085] As described above, if the motor drive control unit 301 determines in step S4 that the motor current has not reached the threshold value (No in step S4), it proceeds to step S21 (described later). In step S21, the motor drive control unit 301 determines whether the time measured by the timer has exceeded the permissible operating time required from the start of forward rotation of the motor 45 until the electromagnet 35 reaches the position of the armature 34 and pushes the armature 34. If the measured time has not exceeded the permissible operating time (No in step S21), the motor drive control unit 301 proceeds to step S4 again. If the measured time has exceeded the permissible operating time (Yes in step S21), it proceeds to step S22.

[0086] In step S22 , the motor drive control unit 301 determines that the electromagnet 35 has not reached the position of the armature 34 and cannot press the armature 34 , and the recovery operation has failed, and ends the series of processes.

[0087] As described above, if the motor drive control unit 301 determines in step S11 that the time-dependent change in the motor current has not reached the predetermined threshold value (No in step S11), the process proceeds to step S23. In step S21, the motor drive control unit 301 determines that the electromagnet 35 has moved while the armature 34 is not securely attracted, and the recovery operation has failed, thereby terminating the series of processes.

[0088] As described above, if the motor drive control unit 301 determines in step S12 that the motor current has not reached the threshold value (No in step S12), it proceeds to step S24. In step S24, the motor drive control unit 301 determines whether the time measured by the timer has exceeded the allowable operating time required from the start of reverse rotation of the motor 45 until the electromagnet 35 and the armature 34 reach their standby positions. If the measured time has not yet exceeded the allowable operating time (No in step S24), the motor drive control unit 301 proceeds to step S11 again. If the measured time has exceeded the allowable operating time (Yes in step S24), it proceeds to step S25.

[0089] In step S25 , the motor drive control unit 301 determines that the electromagnet 35 and the armature 34 have not reached the standby position and the recovery operation has failed, and ends the series of processing.

[0090] According to this embodiment, as described above, when the electric operator 10 is restored to the standby state after an emergency stop, the drive of the electric motor 45 of the electric linear actuator 40 is controlled based on the current flowing in the electric motor 45. This allows the electric operator 10 to reliably return to the standby state without complicating the structure of the electric operator 10, and also allows reliable detection of abnormalities in the electric operator 10 that have failed to recover. Consequently, the reliability of the electric operator's operation can be improved without complicating the structure of the electric operator 10.

[0091] Furthermore, the present invention is not limited to the above-described embodiments and includes various variations. For example, the above-described embodiments are described in detail to facilitate understanding of the present invention and are not necessarily limited to all the structures described. Furthermore, other structures may be added, deleted, or substituted for a portion of the structures in the embodiments.

[0092] For example, a means for detecting the position of the electromagnet 35 after the emergency stop operation of the armature 34 and the position of the armature 34 when the armature 34 is in a standby state using a mechanical switch such as a micro switch may be used simultaneously. In this case, even if an abnormality occurs in either the means using the motor current or the means using the mechanical switch, the recovery operation of the armature 34 can continue.

[0093] Furthermore, when the recovery operation fails, the motor drive control unit 301 may issue an alarm or transmit abnormality information via the communication unit.

[0094] Furthermore, the electric operating device 10 may be provided not only in the upper portion of the car 1 but also in the lower portion or the side portion.

[0095] The elevator equipment may include an elevator including a machine room in which a traction machine and an elevator control device are installed, or may be a so-called machine room-less elevator in which the traction machine and the elevator control device are installed in a hoistway.

[0096] Description of Reference Numerals

[0097] 1…car, 2…emergency stop device, 4…guide rail, 10…electric operator, 11…operating lever, 12…drive shaft, 13…drive spring, 14…fixing portion, 15…pressing member, 16…first operating piece, 17…connecting piece, 18…second operating piece, 19…first operating shaft, 21…lifting rod, 34…armature, 35…electromagnet, 38…armature support, 40…electric linear actuator, 45…motor, 50…upper beam, 101…counterweight, 102…main rope, 103…deflector pulley, 200…traction machine, 201…motor, 202…sheave, 203…brake device, 300…elevator control device, 301…motor drive control unit, 302…motor current measuring unit.

Claims

1. An elevator device, comprising: Car; an emergency stop device provided on the car; and An electric operator provided on the car activates the emergency stop device. The elevator device is characterized in that: The electric operator comprises: electromagnet; an operating lever for operating the emergency stop device in conjunction with the action of the electromagnet; an armature connected to the operating rod; a linear actuator capable of being driven by the electric motor to move the electromagnet linearly; and a motor drive control unit for controlling the driving of the motor, The motor drive control unit, The driving of the motor is controlled based on the motor current flowing in the motor, so that the electromagnet moves to the position of the armature after the emergency stop device is actuated to attract the armature, and then the electromagnet moves to return the armature to the standby position. When the electromagnet is moved to the position of the armature after the emergency stop device is actuated to attract the armature, if the motor current becomes greater than a predetermined first threshold value due to an increase in the motor load, it is determined that the electromagnet has reached the position of the armature after the emergency stop device is actuated, and the driving of the motor is controlled to move the electromagnet to the standby position of the armature. When the electromagnet is moved to return the armature to the standby position, if the motor current becomes greater than a predetermined second threshold value due to an increase in motor load, it is determined that the electromagnet has reached the standby position of the armature and the rotation of the motor is stopped.

2. The elevator apparatus according to claim 1, wherein: The motor drive control unit determines that the armature recovery operation has failed when the motor current does not reach the first threshold value within an allowable time.

3. The elevator apparatus according to claim 1, wherein: The motor drive control unit determines that the armature recovery operation has failed when the motor current does not reach the second threshold value within an allowable time.

4. The elevator apparatus according to claim 1, wherein: The motor drive control section determines whether the electromagnet has failed to attract the armature based on the amount of change in the motor current.

5. The elevator apparatus according to claim 4, wherein: The motor drive control unit determines that the electromagnet has failed to attract the armature when the amount of change in the motor current does not exceed a predetermined threshold value.

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