Elevator device and elevator control method

Abstract

Disclosed is an elevator device and an elevator control method capable of reducing the operation sound of an electrically operated emergency stopper. The elevator device has an electric operator (10) that operates a drive mechanism of an emergency stopper (2). The electric operator has a movable member mechanically connected to the drive mechanism, an electromagnet (35a, 35b) that attracts the movable member in a standby position, restricts the movement of the drive mechanism, and causes the drive mechanism to operate when the speed of a car reaches a predetermined overspeed, a return mechanism that returns the movable member from a moving position (P) at the time of operation of the emergency stopper to the standby position, and a controller (7) that controls the return mechanism. The controller controls the return mechanism so that the electromagnet that is excited to attract the movable member moves from the standby position toward the moving position.

Description

Technical Field

[0001] The present invention relates to an elevator device having an electrically operated emergency stop device and an elevator control method for controlling the elevator device. Background Technology

[0002] In elevator systems, a speed controller and an emergency stop device are included to continuously monitor the car's ascending and descending speed and to ensure the car stops urgently if it falls into a prescribed overspeed condition. Generally, the car and the speed controller are connected by a speed controller rope. When an overspeed condition is detected, the speed controller restrains the speed controller rope, thereby activating the emergency stop device on the car side and bringing the car to an emergency stop.

[0003] In such elevator systems, the governor rope is laid as a long strip within the shaft, making it difficult to achieve space-saving and cost-effectiveness. Furthermore, when the governor rope vibrates, the structures within the shaft are prone to interference with the rope.

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

[0005] In this prior art, a drive mechanism with a drive shaft that drives an emergency stop device and a working mechanism for operating the drive shaft are provided on the car. The working mechanism has a movable iron core mechanically connected to the drive shaft and an electromagnet that attracts the movable iron core. The drive shaft is driven by a spring, but under normal conditions, the electromagnet is energized, causing the movable iron core to be attracted. Therefore, the movement of the drive shaft is constrained by the working mechanism.

[0006] In an emergency, the electromagnet is demagnetized, releasing the constraint on the drive shaft, which is then driven by the force of the drive spring. This activates the emergency stop device, bringing the car to an emergency stop.

[0007] Furthermore, when resetting the emergency stop device to its normal state, the electromagnet is moved to approach the movable iron core that moves during an emergency. After the electromagnet comes into contact with the movable iron core, the electromagnet is energized, attracting the movable iron core to the electromagnet. Then, with the movable iron core attracted by the electromagnet, the electromagnet is driven, returning both the movable iron core and the electromagnet to their normal standby position.

[0008] Existing technical documents

[0009] Patent documents

[0010] Patent Document 1: International Publication No. 2021 / 166318 Summary of the Invention

[0011] The problem that the invention aims to solve

[0012] In the aforementioned prior art, there is a problem that the emergency stop device makes a loud noise when it operates.

[0013] Therefore, the present invention provides an elevator device and an elevator control method capable of reducing the operating noise of an electrically operated emergency stop device.

[0014] Methods for solving problems

[0015] To solve the above-mentioned problems, the elevator device of the present invention includes: a car; an emergency stop device disposed in the car; a drive mechanism that drives the emergency stop device; and an electric operator that operates the drive mechanism. The electric operator includes: a movable member mechanically connected to the drive mechanism; an electromagnet that attracts the movable member in its standby position, constraining the movement of the drive mechanism, and is demagnetized when the car speed reaches a predetermined overspeed, causing the drive mechanism to operate; a reset mechanism that returns the movable member from its moving position when the emergency stop device is activated to its standby position; and a controller that controls the reset mechanism. The controller controls the reset mechanism to move the electromagnet, which is energized and attracts the movable member, from the standby position toward the moving position.

[0016] To address the aforementioned issues, the elevator control method of the present invention is a method for controlling an elevator device, the elevator device comprising: a car; an emergency stop device disposed in the car; a drive mechanism that drives the emergency stop device; and an electric operator that operates the drive mechanism, the electric operator comprising: a movable member mechanically connected to the drive mechanism; an electromagnet that attracts the movable member in a standby position, constraining the movement of the drive mechanism, and is demagnetized when the car speed reaches a predetermined overspeed, causing the drive mechanism to operate; and a reset mechanism that returns the movable member from its moving position when the emergency stop device is activated to its standby position. In this method, the reset mechanism is used to move the electromagnet, which is energized and attracts the movable member, from the standby position toward the moving position.

[0017] Invention Effects

[0018] According to the present invention, the operating noise of an electrically operated emergency stop device can be suppressed.

[0019] Other issues, structures, and effects not mentioned above will be clarified through the following description of the implementation methods. Attached Figure Description

[0020] Figure 1 This is a schematic structural diagram of an elevator device as an example.

[0021] Figure 2 This is a structural diagram showing the detailed structure of the emergency stop device in the embodiment.

[0022] Figure 3This refers to the mechanism of the electric actuator in the embodiment. Figure 1 The top view in the settings state.

[0023] Figure 4 This refers to the mechanism of the electric actuator in the embodiment, and... Figure 3 The same top view.

[0024] Figure 5 This indicates the elevator controller 7 when the power is cut off. Figure 4 The flowchart of the action. Detailed Implementation

[0025] Hereinafter, an elevator device according to an embodiment of the present invention will be described using the accompanying drawings through examples. Furthermore, in the figures, structural elements with the same reference numerals represent the same structural elements or structural elements having similar functions.

[0026] Figure 1 This is a schematic structural diagram of an elevator device according to an embodiment of the present invention.

[0027] like Figure 1 As shown, the elevator device includes: a car 1, speed sensors (5, 6), an electric operator 10, a drive mechanism (12~20), a lifting rod 21, and an emergency stop device 2.

[0028] The car 1 is suspended in the hoistway of the building by a main rope (not shown) and engages with the guide rail 4 in a sliding manner via a guide device (not shown). When the main rope is frictionally driven by a drive device (winch: not shown), the car 1 rises and falls within the hoistway.

[0029] In this embodiment, the speed sensor is mounted on the car 1 and includes a rotary detector 6 and a roller 5 connected to the rotary shaft of the rotary detector 6. In this embodiment, the roller 5 is connected to the rotary shaft of the rotary detector 6 such that the rotary shaft of the roller 5 is coaxial with the rotary shaft of the rotary detector 6. For example, a rotary encoder can be used as the rotary detector 6.

[0030] Roller 5 contacts guide rail 4. Therefore, when car 1 rises or falls, roller 5 rotates, and thus rotation detector 6 rotates. Based on the rotation position signal output by rotation detector 6, the safety controller (described later) monitors the travel speed of car 1.

[0031] Furthermore, an image sensor can also be used as a 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 obtained by the image sensor. For example, the speed can be calculated based on the distance traveled by image feature quantities over a specified time.

[0032] In this embodiment, the electric actuator 10 is an electromagnetic actuator, disposed on the upper part of the car 1. The electromagnetic actuator, for example, has a movable plate or movable rod that operates via a solenoid or electromagnet. The electric actuator 10 operates when a predetermined overspeed condition of the car 1 is detected by the speed sensors (5, 6). At this time, the lifting rod 21 is lifted by the drive mechanism (12-20) mechanically connected to the operating rod 11. As a result, the emergency stop device 2 is put into a braking state.

[0033] Furthermore, the drive mechanisms (12~20) will be described later.

[0034] One emergency stop device 2 is installed on each side of the car 1. Each emergency stop device 2 has a pair of wedge-shaped brake elements (not shown) that are movable between a braking position and a non-braking position, clamping the guide rail 4 in the braking position. Furthermore, when the brake elements rise relative to the car 1 due to the descent of the car 1, braking force is generated due to the friction between the brake elements and the guide rail 4. Thus, the emergency stop device 2 activates when the car 1 enters an overspeed state, bringing the car 1 to an emergency stop.

[0035] The elevator system of this embodiment has a so-called low-voltage governor system that does not use a governor rope. When the lifting 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 drive unit (winch) and the power supply to the control unit that controls the drive unit are cut off. In addition, when the descent 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 installed in the car 1 is energized, causing the emergency stop device 2 to activate, and the car 1 stops urgently.

[0036] In this embodiment, the low-voltage speed controller system comprises the speed sensors (5, 6) and a safety controller that determines the overspeed state of the car 1 based on the output signals of the speed sensors. The safety controller measures the speed of the car 1 based on the output signals of the speed sensors. When it determines that the measured speed has reached a first overspeed, it outputs a command signal to cut off the power supply to the drive unit (winch) and the power supply to the control device controlling the drive unit. Additionally, when it determines that the measured speed has reached a second overspeed, the safety controller outputs a command signal to activate the electric operator 10.

[0037] Furthermore, in this embodiment, although in Figure 1 Not shown in the figure, but the safety controller is configured together with the electric operator 10 on the upper part of the car 1.

[0038] The following describes the drive mechanism (12~20) that drives the lifting lever 21.

[0039] The operating lever 11 of the electric actuator 10 is connected to the first working plate 16, forming a generally T-shaped first linkage component. The operating lever 11 and the first working plate 16 respectively form the head and foot of the T. The generally T-shaped first linkage component is rotatably supported on the crosshead 50 via a first working shaft 19 at the connection between the operating lever 11 and the first working plate 16. At the end of the first working plate 16, which forms the foot of the T, opposite to the connection between the operating lever 11 and the first working plate 16, one end of a pair of lifting levers 21 (left side in the figure) is connected.

[0040] Connecting piece 17 is connected to second working piece 18, forming a generally T-shaped second linkage component. Connecting piece 17 and second working piece 18 respectively form the head and foot of the T. The generally T-shaped second linkage component is rotatably supported on crosshead 50 via second working shaft 20 at the connection between connecting piece 17 and second working piece 18. At the end of second working piece 18, which forms the foot of the T, opposite to the connection between connecting piece 17 and second working piece 18, the other end (left side in the figure) of a pair of lifting rods 21 is connected.

[0041] The end of the operating lever 11 extending from the inside of the housing 30 to the outside, and the end of the connecting piece 17 that is closer to the upper part of the car 1 than the second working 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 lying horizontally on the car 1. The drive shaft 12 slidably passes through the fixing part 14 that is fixed to the crosshead 50. In addition, the drive shaft 12 passes through the pressing member 15, which is fixed to the drive shaft 12. Furthermore, the pressing member 15 is located on the side of the second linkage member (connecting piece 17, second working piece 18) of the fixing part 14. The drive spring 13, which is an elastic body, is located between the fixing part 14 and the pressing member 15, and the drive shaft 12 is inserted into the drive spring 13.

[0042] When the electric actuator 10 is activated, i.e., when the energization to the electromagnet is cut off in this embodiment, the electromagnetic force that restrains the movement of the operating lever 11 against the force of the drive spring 13 disappears. Therefore, the drive shaft 12 is driven along its length by the force of the drive spring 13 applied to the pressing member 15. Consequently, the first linkage member (operating lever 11, first working plate 16) rotates about the first working shaft 19, and the second linkage member (connecting plate 17, second working plate 18) rotates about the second working shaft 20. As a result, the lifting lever 21 connected to the first working plate 16 of the first linkage member is driven and lifted, and the lifting lever 21 connected to the second working plate 18 of the second linkage member is driven and lifted.

[0043] Figure 2 This refers to the emergency stop device 2 in this embodiment. Figure 1 A detailed structural diagram of the structure.

[0044] The emergency stop device 2 includes: a brake element 61, an inclined body 62, and an elastic body 63.

[0045] The brake element 61 has a wedge-shaped shape, and its width narrows as it moves upward. In the brake element 61, the side opposite to the guide rail 4 forms a generally vertical surface, and the side opposite to the guide rail forms a smooth surface.

[0046] A base 22, which houses the brake element 61 of the emergency stop device 2, is connected to the lower end of the lifting lever 21. Therefore, when the lifting lever 21 is moved upward according to the operation of the electric actuator 10, the brake element 61 and the base 22 are moved upward together.

[0047] The brake element 61 is movable between a braking position and a non-braking position in the vertical direction. Figure 2 In the non-braking position, the brake element 61 is away from the guide rail 4. When in the braking position, the vertical surface is in contact with the guide rail 4, and the brake element 61 clamps the guide rail 4.

[0048] The inclined body 62 is located on the opposite side of the guide rail relative to the brake member 61. The inclined body 62 has a wedge-shaped shape, and its width narrows towards the lower side. In the inclined body 62, the side surface on the brake member side forms an inclined smooth surface, and the side surface on the opposite side of the brake member forms a generally vertical surface.

[0049] An elastic body 63 is disposed on the outside of the inclined body 62 and applies an elastic force to the inclined body 62. For example, the elastic body 63 is made of a U-shaped spring and clamps a pair of brake members 61 and a pair of inclined bodies 62 from the outside.

[0050] Furthermore, in this embodiment, the braking element 61, the tilting body 62, and the elastic body 63 are disposed within the frame-shaped or shell-shaped main body 60.

[0051] Figure 3 This refers to the mechanism of the electric actuator 10 in this embodiment. Figure 1 The top view in the settings state. Additionally... Figure 2 The mechanism of the electric actuator 10 shown is in Figure 1 It is stored inside the casing 30.

[0052] Figure 3 The circuit structure for driving and controlling the electric actuator 10 is also described in the document.

[0053] exist Figure 3 In the middle (excluding the double-dotted section), emergency stop device 2 ( Figure 1 When the elevator is in a non-braking state, the electric operator 10 is in a standby state. That is, the elevator is in a normal operating state.

[0054] like Figure 3 As shown, in the standby state, the movable parts (34a, 34b, 34c) connected to the operating lever 11 are attracted by electromagnetic force to the electromagnets 35a and 35b, whose coils are energized. This overcomes the interference from the drive shaft 12 ( Figure 1 ) and the operating lever 11 acts on the drive spring 13 of the movable part ( Figure 1 The force F acting on the actuator constrains the movement of the movable part. Therefore, the electric actuator 10 overcomes the force of the drive spring 13 and constrains the drive mechanism (12~20). Figure 1 (Activities)

[0055] The movable member has: an adsorption part 34a, which is adsorbed onto the magnetic pole surfaces of electromagnets 35a and 35b; and a support part 34b, which is fixed to the adsorption part 34a and connected to the operating lever 11. The operating lever 11 is rotatably connected to the support part 34b of the movable member via a connecting bracket 38. In the electric actuator 10, a movable member position detection switch 109 is provided at the position of the adsorption part 34a of the movable member when in standby mode.

[0056] The movable member also includes a cam portion 34c, which is fixed to the adsorption portion 34a. When the movable member is in the standby position, the cam portion 34c operates the movable member position detection switch 109. When operated by the cam portion 34c, the movable member position detection switch 109 changes from an on state to an off state, or from an off state to an on state. Therefore, it is possible to detect whether the movable member is in the standby position based on the state of the movable member position detection switch 109. In this embodiment, the elevator controller 7 determines whether the movable member is in the standby position based on the state of the movable member position detection switch 109.

[0057] Furthermore, in this embodiment, the movable part position detection switch 109 is in the ON state when operated by the cam part 34c.

[0058] In this embodiment, at least the adsorption part 34a in the movable parts (34a, 34b, 34c) is made of a magnetic material. Soft magnetic materials such as low-carbon steel or permalloy (iron-nickel alloy) are preferably used as the magnetic material.

[0059] about Figure 3 The other departments (36, 37, 39, 41) will be described later.

[0060] Electromagnets 35a and 35b are energized by a DC power supply 300 and a battery 111. In this embodiment, a storage battery is used as the battery 111. The DC power supply 300 consists of a rectifier and a power conversion device that converts AC power input from a commercial single-phase AC power supply 500 into DC power. The DC output of the DC power supply 300 is connected in parallel with the battery 111 via a power supply contact 150. The power supply contact 150 is, for example, a contact of an electromagnetic relay, an electromagnetic contactor, or an electromagnetic switch.

[0061] When AC power is supplied from a commercial single-phase AC power supply 500, electromagnets 35a and 35b are primarily energized by a DC power supply 300. At this time, the power supply contact 150 is controlled by the elevator controller 7 and becomes closed. Thus, the DC power supply 300 energizes electromagnets 35a and 35b and charges battery 111.

[0062] If the power supply from the commercial single-phase AC power supply 500 is cut off during a power outage or maintenance, electromagnets 35a and 35b are energized by battery 111. At this time, power supply contact 150 is controlled by elevator controller 7 and becomes disconnected. This prevents discharge current from battery 111 from flowing into the DC power supply 300 side.

[0063] In the excitation circuit of electromagnet 35a, one end of the coil of electromagnet 35a is connected to the high-potential side of battery 111 via series-connected electrical contacts 104a, 105a and fuse 107a, and is also connected to the high-potential side of DC output of DC power supply 300 via power supply contact 150. The other end of the coil of electromagnet 35a is connected to the low-potential sides of battery 111 and the output of DC power supply.

[0064] In the excitation circuit of electromagnet 35b, one end of the coil of electromagnet 35b is connected to the high-potential side of battery 111 via series-connected electrical contacts 104b and 105b and fuse 107b, and is also connected to the high-potential side of the DC output of DC power supply 300 via power supply contact 150. The other end of the coil of electromagnet 35b is connected to the low-potential sides of both battery 111 and the output of DC power supply 300.

[0065] In addition, fuses 107a and 107b are installed in the excitation circuit to protect electromagnets 35a and 35b from overcurrent.

[0066] Electrical contacts 104a, 105a, 104b, and 105b are controlled to be switched on and off by safety controller 103. In the standby state of the electric actuator 10, safety controller 103 controls each of electrical contacts 104a, 105a, 104b, and 105b to be switched on. This energizes the coils of electromagnets 35a and 35b, thus generating electromagnetic force.

[0067] Furthermore, each of the electrical contacts 104a, 105a, 104b, and 105b is composed of contacts found in, for example, electromagnetic relays, electromagnetic contactors, electromagnetic switches, etc. Additionally, in each excitation circuit of the electromagnets 35a and 35b, multiple (in...) Figure 2 The two electrical contacts are connected in series, so that even if a connection failure occurs at one contact when multiple electrical contacts are controlled to be in the open state to activate the emergency stop device 2, the energization of the electromagnet will be cut off. Therefore, the reliability of the operation of the electric actuator 10 will be improved. In addition, connection failures may occur, for example, due to the melting of the contacts.

[0068] Other electrical equipment sections (37, 112) will be described later. Additionally, signal lines 106a and 106b are used to input response signals from the excitation circuits of electromagnets 35a and 35b to the safety controller 103.

[0069] The response signal (hereinafter referred to as "response signal (106a)") input to the safety controller 103 via signal line 106a represents the potential of the end of the coil of electromagnet 35a that is connected to the high-potential side of battery 111 and DC power supply 300 via electrical contacts 104a and 105a. Therefore, regarding the response signal (106a), if electromagnet 35a is energized, it represents the potential of the high-potential side of battery 111 and DC power supply 300 (high potential (HIGH)), and if electromagnet 35a is not energized, it represents the potential of the low-potential side of battery 111 and DC power supply 300 (low potential (LOW)). Based on the potential represented by such response signal (106a), the safety controller 103 detects the energization state of electromagnet 35a.

[0070] The response signal (hereinafter referred to as "response signal (106b)") input to the safety controller 103 via signal line 106b represents the potential of the end of the coil of electromagnet 35b that is connected to the high-potential side of battery 111 and DC power supply 300 via electrical contacts 104b and 105b. Therefore, regarding the response signal (106b), if electromagnet 35b is energized, it represents the potential of the high-potential side of battery 111 and DC power supply 300 (high potential (HIGH)), and if electromagnet 35b is not energized, it represents the potential of the low-potential side of battery 111 and DC power supply 300 (low potential (LOW)). Based on the potential represented by such response signal (106b), the safety controller 103 detects the energization state of electromagnet 35b.

[0071] Next, the operation of the electric actuator 10 when the emergency stop device 2 is in operation will be explained.

[0072] When the safety controller 103 detects a predetermined overspeed state (second overspeed) in the car 1 based on the rotational position signal S from the rotational detector 6, it outputs a disconnect command to each of the electrical contacts 104a, 105a, 104b, and 105b. According to the disconnect command, the electrical contacts 104a, 105a, 104b, and 105b change from the on state (…). Figure 3 The electromagnets 35a and 35b are switched to the off state. Therefore, the excitation of electromagnets 35a and 35b is stopped, and the electromagnetic force acting on the movable parts (34a, 34b, 34c) disappears. Consequently, the constraint on the movable part caused by the attraction of the movable part's adsorption portion 34a by electromagnets 35a and 35b is released, and the movable part, through the force of the driving spring 13 (…),… Figure 3 (F in the middle) and from the position in standby mode ( Figure 3 The device moves to position P in the direction of the force exerted by the driving spring 13 (to the right in the diagram). Figure 3 In the diagram, a double-dotted line represents a movable part after it has been moved.

[0073] As the constraint on the movable part is released, the drive shaft 12 is pressed by the pressing part 15 of the drive shaft 12. Figure 1 ) bears, from the fixed part 14 ( Figure 1 ) Towards the pressing component 15 ( Figure 1 ) direction drive spring 13 ( Figure 1 Driven by the force of the drive shaft 12. When the drive shaft 12 is driven, the first linkage component (operating lever 11 and first working plate 16) connected to the drive shaft 12 is activated. Figure 1 ) around the first working axis 19 ( Figure 1 ) rotates. This causes the lifting rod 21 (connected to the first working piece 16) to rotate. Figure 1The second linkage component (connecting piece 17 and second working piece 18) connected to the drive shaft 12 is lifted. Additionally, when the drive shaft 12 is driven, the second linkage component (connecting piece 17 and second working piece 18) is lifted. Figure 1 ) around the second working axis 20 ( Figure 1 ) rotate. Therefore, the lifting rod 21 connected to the second working piece 18 ( Figure 1 (This was mentioned.)

[0074] Next, the reset action of the electric actuator 10 will be explained.

[0075] To reset the electric actuator 10 from the working state to the standby state, as described below, the movable parts (34a, 34b, 34c) are moved from the moved position (…) by means of the reset mechanism (36, 37, 39, 41) and the electrical equipment (37, 112). Figure 2 The position P) returns to the position it was in during standby.

[0076] The electric actuator 10 has a feed screw 36 for driving the movable part. The feed screw 36 is coaxially connected to the rotation shaft of the motor 37 and is supported by the support member 41 to be rotatable. 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 screwed onto the feed screw 36. The feed screw 36 is rotated by the motor 37. The motor 37 is driven by the motor controller 112.

[0077] The motor controller 112 has a drive circuit for the motor 37 and controls the rotation of the motor 37 according to control commands from the elevator controller 7. The motor 37 can be either a DC motor or an AC motor.

[0078] Furthermore, the elevator controller 7 controls the normal operation of the car 1 and has information related to the operating status of the car 1. In this embodiment, as described above, the elevator controller 7 also has the function of controlling the motor 37 of the electric operator 10.

[0079] When the electric actuator 10 is reset to the standby state, the elevator controller 7 sends a rotation command for the motor 37 to the motor controller 112. Upon receiving the rotation command, the motor controller 112 drives the motor 37 to rotate the feed screw 36. Through the rotating feed screw 36 and the feed nut portion of the electromagnet support plate 39, the rotation of the motor 37 is converted into linear movement of the electromagnets 35a and 35b along the axial direction of the feed screw 36. As a result, the electromagnets 35a and 35b approach the moving position P of the movable members (34a, 34b, 34c) and come into contact with them.

[0080] The motor controller 112 monitors the motor current to control the motor 37. As described above, when electromagnets 35a and 35b come into contact with the movable parts, the load on the motor 37 increases, and therefore, the motor current increases. If the motor current increases and exceeds a predetermined value, the motor controller 112 determines that electromagnets 35a and 35b are in contact with the movable parts. The motor controller 112 transmits this determination result to the safety controller 103 and the elevator controller 7.

[0081] When the safety controller 103 receives the judgment result from the motor controller 112, it issues an output energizing command to each of the electrical contacts 104a, 105a, 104b, and 105b. According to the energizing command, the electrical contacts 104a, 105a, 104b, and 105b change from an open state to an on state. Therefore, the electromagnets 35a and 35b are energized. Regarding the attraction part 34a in the movable part, it is attracted by the electromagnetic force of the energized electromagnets 35a and 35b.

[0082] When the elevator controller 7 receives the determination result from the motor controller 112, it sends a reverse command to the motor controller 112 to reverse the rotation direction of the motor 37. 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 movable part attracted by the electromagnets 35a and 35b, while bearing the force of the drive spring 13, moves together with the electromagnets 35a and 35b toward the standby position.

[0083] The cam portion 34c of the movable members (34a, 34b, 34c) moves the movable members (34a, 34b, 34c) to position P when the electric actuator 10 is activated. Figure 3 Until the electric actuator 10 completes its reset action, it moves away from the movable part position detection switch 109. Therefore, at this time, the movable part position detection switch 109 is in the off state.

[0084] When the movable parts (34a, 34b, 34c) attracted by electromagnets 35a and 35b reach the standby position, the movable part position detection switch 109 is activated by the cam portion 34c of the movable part. When the movable part position detection switch 109 is activated, the elevator controller 7 determines that the movable part is in the standby position. Based on this determination, the elevator controller 7 sends a stop command to the motor controller 112 for the motor 37. Upon receiving the stop command, the motor controller 112 stops the rotation of the motor 37.

[0085] In this embodiment, the DC power supply 300 consists of a rectifier and a power conversion device that convert AC power from a commercial single-phase AC power supply 500 into DC power. The commercial single-phase AC power supply 500 may also be one phase of a commercial three-phase AC power supply (not shown) that supplies power to the winch 200 and the elevator controller 7 that drives and controls the winch 200.

[0086] In addition to electromagnets 35a and 35b, DC power supply 300 also serves as a power source for activating safety controller 103, rotary detector 6, electrical contacts 104a, 104b, 105a, and 105b, as well as for generating response signals (106a and 106b).

[0087] To compensate for the power supply to the load for a short period during power outages or voltage drops, a battery 111 is connected to the output of the DC power supply 300. Thus, the supply of DC power is maintained even when the power supply from the commercial single-phase AC power supply 500 is interrupted.

[0088] Furthermore, in this embodiment, the elevator controller 7 includes: a power conversion device such as an inverter that drives the motor 201 of the winch 200; a control unit that controls the motor 201 by controlling the power conversion device; a DC power supply for the braking device 202 of the winch 200; and a control unit that controls the opening and closing of the braking device 202. AC power is supplied to the elevator controller 7 from a commercial three-phase AC power source via normally open contacts provided by electromagnetic contactors, electromagnetic switches, etc. Normally, the normally open contacts are closed.

[0089] When the safety controller 103 determines that the speed of the car 1 has reached the aforementioned first overspeed, it commands the electrical contacts to open the normally open contacts. This cuts off the power supply from the commercial three-phase AC power source to the elevator controller 7, thus stopping the drive control of the motor 201 and engaging the braking device 202. Therefore, the car 1 is brought to an emergency stop.

[0090] Next, use Figure 4 The general operation of the elevator device in this embodiment will be described when the power supply is cut off, that is, when the power supply of the commercial single-phase AC power supply 500 is cut off.

[0091] Figure 4 This refers to the mechanism of the electric actuator 10 in this embodiment, and... Figure 3 The same top view.

[0092] When the electric operator 10 operates according to the command signal from the safety controller 103, causing the drive mechanism (12-20) to actuate, the emergency stop device 2 and the drive mechanism (12-20) will produce an activation sound. Additionally, even if no overspeed condition of the car 1 is detected and the safety control device does not output a command signal, the drive mechanism (12-20) will still actuate when the power supply to the commercial single-phase AC power supply 500 is cut off and the electromagnet is demagnetized. At this time, elevator users and maintenance technicians will hear the activation sound of the emergency stop device 2 and the drive mechanism (12-20).

[0093] Therefore, as described below, the elevator device of this embodiment has a unit that maintains the excitation of the electromagnet in the event that the power supply of the commercial single-phase AC power supply 500 is cut off, so as to prevent or suppress the generation of operating sounds of the emergency stop device 2 and the drive mechanism.

[0094] Hereinafter, it is assumed that the safety controller 103 did not detect car 1 ( Figure 1 (and other abnormalities such as overspeeding.)

[0095] The safety controller 103 detects the voltage between the output terminals of the DC power supply 300 and detects a power cut-off based on a decrease in the detected voltage. When a power cut-off is detected, the safety controller 103 sends a power cut-off detection signal to the elevator controller 7. Furthermore, the safety controller 103 and the elevator controller 7 are communicatively connected via wired or wireless means.

[0096] When the elevator controller 7 receives a power cut-off detection signal from the safety controller 103, it opens the power supply contact 150 (refer to...). Figure 4 The contact position p (single-dot dashed line) switches the power supply of electromagnets 35a, 35b, motor controller 112 and safety controller 103 from DC power supply 300 to battery 111.

[0097] The elevator controller 7 has a battery (not shown) as an emergency power source. When it detects a power outage from the commercial three-phase AC power supply, or when it receives a power outage detection signal from the safety controller 103, it switches the power supply of the elevator controller 7 from the commercial three-phase AC power supply to the battery. Alternatively, the battery 111 can also be used as an emergency power source for the elevator controller 7.

[0098] Safety controller 103 continues to operate powered by battery 111. Therefore, since safety controller 103 does not detect an overspeed condition in car 1, it keeps electrical contacts 104a, 105a, 104b, and 105b in the ON state. This keeps electromagnets 35a and 35b energized, thus electromagnets 35a and 35b continuously attract the movable parts (34a, 34b, 34c) in the standby position.

[0099] The elevator controller 7 activates the reset mechanisms (36, 37, 39, 41), causing the electromagnets 35a and 35b, which attract the movable parts, to move from the standby position of the movable parts towards the moving position P of the movable parts when the emergency stop device 2 is activated in the case of car 1 being in an overspeed state. At this time, the moving speed of the electromagnets 35a and 35b is less than the moving speed of the movable parts when the emergency stop device 2 is activated. Therefore, compared to the case of car 1 being in an overspeed state, the emergency stop device 2 and the drive mechanism (12~20) operate slowly, thus suppressing the operating noise of the emergency stop device 2 and the drive mechanism.

[0100] Elevator controller 7 controls motor controller 112 to make motor 37 rotate forward, thereby causing feed screw 36 to rotate in the direction of arrow circle A. As a result, 35a and 35b of electromagnet support plate 39, which is fixed to feed nut that engages with feed screw 36, and movable parts attracted by electromagnets 35a and 35b, move together with electromagnet support plate 39 in the direction of arrow A, that is, toward moving position P.

[0101] In this embodiment, when the elevator controller 7 detects the arrival of the movable element at the moving position P via the movable element position detection switch 110, it controls the motor controller 112 to stop the motor 37. That is, the electromagnets 35a and 35b and the movable element stop at the moving position P (see reference). Figure 4 (The double-dotted line in the middle).

[0102] After the electromagnets 35a and 35b and the movable part stop, the safety controller 103 detects the voltage between the output terminals of the DC power supply 300. When the rise in the detected voltage indicates that the power cut-off has been lifted, i.e. the power supply of the DC power supply 300 has been reset, the safety controller 103 sends a power supply reset detection signal to the elevator controller 7.

[0103] When the elevator controller 7 receives a power supply reset detection signal from the safety controller 103, it closes the power supply contact 150 (refer to...). Figure 4 At the contact points (solid lines) in the diagram, the power supply for electromagnets 35a and 35b, motor controller 112, and safety controller 103 is switched from battery 111 to DC power supply 300. At this time, when the elevator controller 7 detects a power supply reset from commercial three-phase AC power supply, or when it receives a power supply reset detection signal from safety controller 103, it switches the power supply for the elevator controller 7 from battery to commercial three-phase AC power supply.

[0104] The elevator controller 7 activates the reset mechanism (36, 37, 39, 41), causing the electromagnets 35a and 35b that attract the movable part to move from the movable part's moving position P toward the standby position.

[0105] At this time, the elevator controller 7 controls the motor controller 112 to reverse the motor 37, thereby causing the feed screw 36 to rotate in the opposite direction to arrow circle A. As a result, the electromagnets 35a and 35b, which are fixed to the electromagnet support plate 39 with the feed nut that engages with the feed screw 36, and the movable parts attracted by the electromagnets 35a and 35b, move together with the electromagnet support plate 39 in the opposite direction to arrow A, that is, toward the standby position.

[0106] In this embodiment, when the elevator controller 7 detects the movable element's arrival at the standby position via the movable element position detection switch 109, it controls the motor controller 112 to stop the motor 37. That is, the electromagnets 35a and 35b and the movable element stop at the standby position. In other words, the electric operator 10 resets to the standby state.

[0107] Figure 5 This indicates the elevator controller 7 when the power is cut off. Figure 4 The flowchart of the action is shown below. Refer to the following description as appropriate. Figure 4 .

[0108] The elevator controller 7 in this embodiment has a computer system such as a microcomputer, and performs actions by executing prescribed programs through the computer system. Furthermore, the safety controller 103 has its own independent computer system compared to the elevator controller 7.

[0109] In step S1, the elevator controller 7 determines whether the power supply from the DC power supply 300 has been cut off, i.e., whether a power cut-off has occurred, based on the presence or absence of a power cut-off detection signal from the safety controller 103. If the elevator controller 7 determines that a power cut-off has occurred due to the presence of a power cut-off detection signal (Yes in step S1), then it executes step S2. Conversely, if the elevator controller 7 determines that a power cut-off has not occurred due to the absence of a power cut-off detection signal (No in step S1), then it executes step S1 again.

[0110] In step S2, the elevator controller 7 opens the power supply contact 150, switching the power supply to the electromagnets 35a, 35b, the motor controller 112, and the safety controller 103 from the DC power supply 300 to the battery 111 (in Figure 5 (This is referred to as "battery powered"). After executing step S2, elevator controller 7 then executes step S3.

[0111] In step S3, the elevator controller 7 determines whether a predetermined time has elapsed since the execution of step S2, i.e., since the switch to battery power. The predetermined time is preset to be the discharge time of battery 111 up to the allowable battery reserve for compensating for the power supply to electromagnets 35a, 35b, motor controller 112, and safety controller 103.

[0112] The elevator controller 7 executes step S3, thereby enabling the reset mechanism to operate before the battery 111 is depleted, even if the power outage lasts for a relatively long time (e.g., during maintenance work), thus suppressing the operating noise of the emergency stop device and the drive mechanism.

[0113] If the elevator controller 7 determines that the specified time has elapsed (yes in step S3), then it proceeds to step S4. Conversely, if the elevator controller 7 determines that the specified time has not elapsed (no in step S3), then it proceeds to step S6.

[0114] In step S6, the elevator controller 7 determines whether to continue battery power supply based on the presence or absence of a power supply reset detection signal from the safety controller 103. If the elevator controller 7 determines to continue battery power supply when there is no power supply reset detection signal (Yes in step S6), it executes step S3 again. Alternatively, if the elevator controller 7 determines to discontinue battery power supply when there is a power supply reset detection signal (No in step S6), it closes the power supply contact 150, restoring the power supply to the electromagnets 35a, 35b, the motor controller 112, and the safety controller 103 from battery power supply to DC power supply 300, and then ends the series of processes.

[0115] The elevator controller 7 executes step S6, thereby enabling the power supply to the DC power supply 300 to be quickly restored without causing the reset mechanism to perform unnecessary actions (corresponding to steps S4~S5, S7~S9) in the event that the power cut ends in a relatively short time (e.g., a short power outage such as a momentary power outage).

[0116] In step S4, the elevator controller 7 uses the motor controller 112 to make the motor 37 rotate forward. This causes the feed screw 36 to rotate, and consequently, the electromagnets 35a and 35b and the movable parts (34a, 34b, 34c) attracted by the electromagnets 35a and 35b move towards the position P of the movable parts when the emergency stop device 2 operates in the case of the car 1 being in an overspeed state. Figure 4 (Movement). When the elevator controller 7 executes step S4, it then executes step S5.

[0117] In step S5, the elevator controller 7 determines, based on the on / off state of the movable member position detection switch 110, whether the electromagnets 35a and 35b and the movable member have reached one of the endpoints located on the moving position P side of the two endpoints within the movable range of the straight line of the electromagnets 35a and 35b and the movable member. In this embodiment, one endpoint is the moving position P. Furthermore, in this embodiment, the movable member position detection switch 110 is in the on state when operated by the cam portion 34c of the movable member.

[0118] When the elevator controller 7 determines that the electromagnets 35a and 35b and the movable part have reached one of their endpoints (in step S5) by the movable part position detection switch 110 being turned on, it uses the motor controller 112 to stop the rotation of the motor 37 and then ends the series of processes.

[0119] In this case, the brake element 61 of the emergency stop device 2 ( Figure 2 The elevator is lifted to the braking position, therefore, the elevator controller 7 has finished. Figure 5 After a series of processes, the emergency stop device 2, which is powered back to DC power supply 300, is transferred to a return operation. During the return operation, the reset mechanism is activated to return the movable part to the standby position, but the electromagnets 35a and 35b have already moved to the moving position P, thus shortening the time required for the movable part to return to the standby position.

[0120] When the elevator controller 7 determines that the electromagnets 35a and 35b and the movable part have not reached one of the endpoints due to the movable part position detection switch 110 being in the off state (No in step S5), then step S7 is executed.

[0121] In step S7, the elevator controller 7 determines whether to continue battery power supply based on the presence or absence of a power supply reset detection signal from the safety controller 103. If the elevator controller 7 determines to continue battery power supply when there is no power supply reset detection signal (Yes in step S7), it again executes step S4 to continue the forward rotation of the motor 37. Alternatively, if the elevator controller 7 determines to discontinue battery power supply when there is a power supply reset detection signal (No in step S6), it closes the power supply contact 150, returning the power supply to the electromagnets 35a, 35b, the motor controller 112, and the safety controller 103 from battery power supply to the DC power supply 300, and then executes step S8.

[0122] When the elevator controller 7 executes step S7, it can immediately move the electromagnets 35a, 35b and the movable member toward the standby position when the power supply of the DC power supply 300 is restored before the electromagnets 35a, 35b and the movable member move toward one end of the elevator during the movement (corresponding to steps S8 and S9).

[0123] In step S8, the elevator controller 7 uses the motor controller 112 to reverse the motor 37. This reverses the feed screw 36, causing the electromagnets 35a and 35b and the movable parts (34a, 34b, 34c) attracted by the electromagnets 35a and 35b to move toward the standby position. After executing step S8, the elevator controller 7 then executes step S9.

[0124] In step S9, the elevator controller 7 determines, based on the on / off state of the movable member position detection switch 109, whether the electromagnets 35a and 35b and the movable member have reached the other endpoint of the two endpoints located on the standby position side within the movable range of the straight line of the electromagnets 35a and 35b and the movable member. In this embodiment, the other endpoint is the standby position. Furthermore, in this embodiment, the movable member position detection switch 109 is turned on when operated by the cam portion 34c of the movable member.

[0125] When the elevator controller 7 determines that the electromagnets 35a and 35b and the movable part have not reached the other end point when the movable part position detection switch 109 is in the off state (No in step S9), it executes step S8 again to continue the reverse rotation of the motor 37. Conversely, when the elevator controller 7 determines that the electromagnets 35a and 35b and the movable part have reached the other end point, i.e., the standby position, when the movable part position detection switch 109 is in the on state (Yes in step S9), it uses the motor controller 112 to stop the rotation of the motor 37, and then ends the series of processes.

[0126] As described above, according to this embodiment, when the DC power supply 300 of the electric actuator 10 is cut off, the electromagnets 35a and 35b, which are attracted to the movable parts (34a, 34b, 34c) by the excitation of the battery 111, move from the standby position to the moving position, thereby causing the emergency stop device 2 and the drive mechanism (12-20) to operate slowly. This suppresses the operating noise of the emergency stop device 2 and the drive mechanism (12-20) when the power is cut off.

[0127] In the above embodiment, the safety controller 103 detects the cutting off and resetting of the power supply to the DC power supply 300, but it is not limited to this and can also be detected by the elevator controller 7. In this case, the elevator controller 7 determines the cutting off and resetting of the power supply to the DC power supply 300 based on the cutting off and resetting of the power supply to the commercial three-phase AC power supply that powers the elevator controller 7 and the hoist 200.

[0128] Alternatively, one of the endpoints can be positioned closer to the standby position than the moving position P, and a movable part position detection switch 110 can be installed at this position. In this case, after the electromagnets 35a and 35b reach one of the endpoints, they are demagnetized, and a portion of the elastic energy of the drive spring 13 is released when the drive mechanism (12-20) and the emergency stop device 2 are activated. Therefore, the noise from the operation of the drive mechanism (12-20) and the emergency stop device 2 can be suppressed.

[0129] Furthermore, as in the embodiments described above, by setting one end point to the moving position P, the operating noise of the drive mechanism (12-20) and the emergency stop device 2 can be reliably suppressed. Additionally, when the movable part position detection switch 110 is provided at the moving position P, the movable part position detection switch 110 can also be used for detecting the operation of the emergency stop device.

[0130] This invention is not limited to the embodiments described above, but includes various modifications. For example, the embodiments described are examples given in detail for the purpose of readily understanding and illustrating the invention, and are not necessarily limited to having all the described structures. Furthermore, for a part of the structure of the embodiments, other structures can be added, deleted, or replaced.

[0131] For example, it can also replace the movable part position detection switch 109 and be used with other position detection sensors, such as photoelectric position sensors, magnetic position sensors, proximity sensors (capacitive type, inductive type), etc.

[0132] In addition, the electric operator 10 can be installed not only at the top of the car 1, but also at the bottom or side.

[0133] In addition, elevator units can have a machine room or can be so-called machine room-less elevators.

[0134] Explanation of reference numerals in the attached figures

[0135] 1…Car, 2…Emergency stop device, 4…Guide rail, 5…Roller, 6…Rotation detector, 7…Elevator controller, 10…Electric operator, 11…Operating lever, 12…Drive shaft, 13…Drive spring, 14…Fixing part, 15…Pressing part, 16…First working plate, 17…Connecting plate, 18…Second working plate, 19…First working shaft, 20…Second working shaft, 21…Lifting rod, 22…Platform, 30…Housing, 34a…Adsorption part, 34b…Support part, 34c…Cam part, 35a, 35b…Electromagnet, 36…Feed screw, 37…Motor, 38…Connecting bracket, 39…Electromagnet support plate, 41…Support component, 50…Crosshead, 60…Main body, 61…Brake component, 62…Inclined body, 63…Elastic body, 103…Safety controller, 104a, 105a, 104b, 105b…Electrical contacts, 106a, 106b…Signal lines, 107a, 107b…Fuse, 109, 110…Moving part position detection switch, 111…Battery, 112…Motor controller, 150…Power supply contact, 200…Winch, 201…Motor, 202…Brake device, 300…DC power supply, 500…Commercial single-phase AC power supply.

Claims

1. An elevator device, comprising: The car; An emergency stop device is installed in the car; A drive mechanism that drives the emergency stop device; An electric actuator that operates the drive mechanism. Its features are, The electric actuator has: Movable component, which is mechanically connected to the drive mechanism; An electromagnet attracts the movable part in its standby position, constraining the movement of the drive mechanism, and is demagnetized when the speed of the car reaches a predetermined overspeed, thereby causing the drive mechanism to operate. A reset mechanism that returns the movable part from the position where the emergency stop device is activated to the standby position; The controller controls the reset mechanism. The controller controls the reset mechanism to move the electromagnet, which is energized and attracted to the movable part, from the standby position toward the moving position.

2. The elevator device according to claim 1, characterized in that, The elevator system has a power supply and a battery that supply power to the electric actuator. When the power supply to the electric actuator is switched from the power source to the battery, the electromagnet that is energized and attracted to the movable part moves from the standby position toward the moving position.

3. The elevator device according to claim 2, characterized in that, When the power supply to the electric actuator is cut off, the power supply to the electric actuator is switched to the power supply of the battery.

4. The elevator device according to claim 2, characterized in that, If a predetermined time has elapsed since the switch to battery power, the controller activates the reset mechanism, causing the electromagnet to move.

5. The elevator device according to claim 4, characterized in that, The specified time is the discharge time of the battery until it reaches the battery margin allowed to compensate for the power supply of the battery to the electric actuator.

6. The elevator device according to claim 4, characterized in that, When the power supply to the electric actuator is cut off, the power supply to the electric actuator is switched to the power supply to the battery. If the power supply to the electric actuator is reset before the specified time has elapsed since the switch to battery power, the power supply to the electric actuator is switched to the power supply of the battery.

7. The elevator device according to claim 1, characterized in that, If the movable member reaches the endpoint of the moving position side within the moving range of the movable member and the electromagnet, the controller controls the reset mechanism to stop the movement of the electromagnet.

8. The elevator device according to claim 7, characterized in that, The elevator system has a power supply and a battery that supply power to the electric actuator. When the power supply to the electric actuator is cut off, the power supply is switched to the battery power supply. Before the movable part reaches the endpoint on the moving position side, the power supply is reset. If the power supply to the electric actuator is switched to the power supply of the power source, the controller causes the reset mechanism to operate, causing the electromagnet to move toward the endpoint on the standby position side within the moving range.

9. The elevator device according to claim 8, characterized in that, The endpoint on the standby position side is the standby position.

10. An elevator control method for controlling an elevator device, the elevator device comprising: a car; an emergency stop device disposed in the car; a drive mechanism for driving the emergency stop device; and an electric operator for operating the drive mechanism, the electric operator comprising: a movable member mechanically connected to the drive mechanism; an electromagnet that attracts the movable member in a standby position, constraining the movement of the drive mechanism, and being demagnetized when the speed of the car reaches a predetermined overspeed, thereby operating the drive mechanism; and a reset mechanism that returns the movable member from its position when the emergency stop device is activated to the standby position. Its features are, The electromagnet, which is attracted to the movable part by the excitation, moves from the standby position toward the moving position.

11. The elevator control method according to claim 10, characterized in that, The elevator system has a power supply and a battery that supply power to the electric actuator. When the power supply to the electric actuator is switched from the power source to the battery, the electromagnet that is energized and attracted to the movable part moves from the standby position toward the moving position.

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