Elevator arrangement

Abstract

An elevator system equipped with an electric emergency stop device is disclosed, which can adjust the spring force applied to the drive shaft without changing the lifting stroke of the emergency stop device. The elevator system includes an elevator car (1), an emergency stop device (2) installed in the elevator car, a drive mechanism installed in the elevator car that actuates the emergency stop device, and an electric actuator (10) that actuates the drive mechanism. The drive mechanism includes a spring (13) and a drive shaft (12), which actuates the emergency stop device by rotating using the force of the spring. The electric actuator restrains the drive shaft by resisting the force of the spring. When the electric actuator releases the restraint of the drive shaft, the drive shaft rotates due to the force of the spring. Furthermore, the elevator system includes a spring force adjustment mechanism that adjusts the force of the spring without rotating the drive shaft.

Description

Technical Field

[0001] This invention relates to an elevator device equipped with an emergency stop device that is electrically operated. Background Technology

[0002] Elevator systems are equipped with speed controllers and emergency stop devices to continuously monitor the elevator car's ascending and descending speeds and to bring the elevator car to an emergency stop if it falls into a prescribed overspeed condition. Typically, the elevator car and speed controller are connected by speed controller cables. When an overspeed condition is detected, the speed controller, by restraining the speed controller cables, activates the emergency stop device on the elevator car side, thereby bringing the elevator car to an emergency stop.

[0003] In such elevator systems, the use of long, thin governor cables within the elevator shaft makes space-saving and cost-effectiveness difficult to achieve. Furthermore, when the governor cables swing, interference can easily occur between the structures within the elevator shaft and the governor cables themselves.

[0004] In response, an emergency stop device that does not use the governor cable was proposed.

[0005] As prior art related to emergency stop devices that do not use governor slings, the technologies described in Patent Document 1 and Patent Document 2 are known.

[0006] In the technology described in Patent Document 1, a drive mechanism for activating the emergency stop device and an electric actuator for activating the drive mechanism are located below the elevator car. The drive mechanism has a drive shaft for activating the emergency stop device. The drive shaft has a torsion spring portion, and when the electric actuator is activated, the drive shaft rotates due to the force of the torsion spring portion. When the drive shaft rotates, the emergency stop device is activated.

[0007] The electric actuator includes: a lever connected to a drive shaft; a movable part rotatably connected to the lever; and an electromagnet that attracts the movable part in a standby state. When the movable part is attracted to the electromagnet, the drive shaft is constrained by the lever. When the electric actuator is activated and the electromagnet stops energizing, the constraint on the drive shaft is released, and the drive shaft rotates under the force of a torsion spring.

[0008] In the technology described in Patent Document 2, a drive shaft that activates the emergency stop device and an actuator that normally restricts the movement of the drive shaft are located at the bottom of the elevator car. The drive shaft rotates under the force of a torsion spring. When the drive shaft rotates, the emergency stop device activates.

[0009] The stop rod, which contacts the drive lever connected to the drive shaft, is stressed by a tension spring. Normally, the actuator is energized, and the movable rod of the actuator inhibits the movement of the stop rod, thus constraining the movement of the drive shaft. When the elevator car becomes overspeeding and stops energizing the actuator, the stop rod moves under the force of the tension spring, releasing the constraint on the drive shaft, allowing it to rotate under the force of a torsion spring.

[0010] Existing technical documents

[0011] Patent documents

[0012] Patent Document 1: International Publication No. 2023 / 047561

[0013] Patent Document 2: International Publication No. 2019 / 220505 Summary of the Invention

[0014] The problem that the invention aims to solve

[0015] In the aforementioned prior art, the drive shaft is rotated by adjusting the force of the spring applied to it. Therefore, the lifting stroke of the brake component of the emergency stop device connected to the drive shaft changes, necessitating adjustment of the lifting stroke.

[0016] Therefore, the present invention provides an elevator device equipped with an electric emergency stop device that can adjust the spring force applied to the drive shaft without changing the lifting stroke.

[0017] Methods for solving problems

[0018] To address the aforementioned issues, the elevator device of the present invention includes: an elevator car; an emergency stop device disposed in the elevator car; a drive mechanism disposed in the elevator car to actuate the emergency stop device; and an electric operator to actuate the drive mechanism. The drive mechanism includes: a spring portion; and a drive shaft, which actuates the emergency stop device by rotating using the force of the spring portion. The electric operator restrains the drive shaft by resisting the force of the spring portion. When the electric operator releases the restraint on the drive shaft, the drive shaft rotates due to the force of the spring portion. Furthermore, the elevator device of the present invention includes a spring force adjustment mechanism that adjusts the force of the spring portion without rotating the drive shaft.

[0019] Invention Effects

[0020] According to the present invention, the spring force acting on the drive shaft can be adjusted without changing the lifting stroke.

[0021] Other issues, structures, and effects not mentioned above will be clarified through the following description of the implementation methods. Attached Figure Description

[0022] Figure 1 This is a schematic structural diagram of an elevator device as an example.

[0023] Figure 2 This indicates the structure of the emergency stop device 2 and the electric actuator 10. Figure 1 View A in the diagram.

[0024] Figure 3 This indicates that the electric actuator 10 is in the non-operating state when the emergency stop device 2 is in operation. Figure 1 The structural diagram of the mechanical structure.

[0025] Figure 4 This indicates the structure of the spring section 13. Figure 1 View B in the diagram.

[0026] Figure 5 This indicates the structure of the spring section 13 and the spring force adjustment mechanism 70. Figure 1 The C-direction view in the image.

[0027] Figure 6 This indicates the structure of the spring section 13 with adjusted torsion angle and the spring force adjustment mechanism 70. Figure 1 The C-direction view in the image. Detailed Implementation

[0028] Hereinafter, an elevator device according to one embodiment of the present invention will be described using the accompanying drawings. It should be noted that in the figures, structures with the same reference numerals represent the same constituent elements or constituent elements having similar functions.

[0029] Figure 1 This is a schematic structural diagram of an elevator device as an embodiment of the present invention.

[0030] like Figure 1 As shown, the elevator system includes an elevator car 1, an emergency stop device 2, a drive mechanism (12-22) for activating the emergency stop device 2, and an electric operator 10 for activating the drive mechanism.

[0031] The elevator car 1 is suspended within a building's elevator shaft by a main hoisting cable 3, which is wound around a pulley 5 located at the bottom of the elevator car 1. Furthermore, the elevator car 1 is slidably engaged with a guide rail 4 via a guide device (not shown). When the main hoisting cable 3 is driven by friction through a drive device (winch: not shown), the elevator car 1 moves up and down within the elevator shaft. It should be noted that the elevator device in this embodiment is a so-called machine-room-less elevator, in which a drive device (winch: not shown) and an elevator control device (not shown) are installed within the elevator shaft.

[0032] A speed detection device (not shown) is installed in the elevator car 1 and continuously monitors the lifting speed of the elevator car 1 within the lifting channel. Therefore, the speed detection device can detect when the lifting speed of the elevator car 1 exceeds the specified overspeed limit.

[0033] In this embodiment, the speed detection device includes an image sensor, which detects the speed of the elevator car 1 based on image information of the surface state of the guide rail 4 obtained by the image sensor. For example, the speed detection device calculates the speed based on the distance traveled by image feature quantities within a specified time.

[0034] It should be noted that the speed detection device can also calculate the speed of the elevator car based on the output signal of a rotary encoder that rotates together with the movement of the elevator car.

[0035] In this embodiment, the electric actuator 10 is an electromagnetic actuator, which is located at the lower part of the elevator car 1. In addition, the drive mechanism (12-17) is also located at the lower part of the elevator car 1.

[0036] When the electric actuator 10 is activated, the drive shaft 12 of the emergency stop device 2 rotates about its central axis in the longitudinal direction due to the force of the spring part 13. When the drive shaft 12 rotates, the brake element of the emergency stop device 2, which is mechanically connected to the drive shaft 12, is lifted. As a result, the emergency stop device 2 is activated.

[0037] like Figure 1 As shown, the drive shaft 12 is disposed at the lower part of the elevator car 1. The drive shaft 12 is supported at the lower part of the elevator car 1 by a first support portion 16 and a second support portion 17 so that it can rotate.

[0038] In this embodiment, the spring portion 13 is composed of a torsion coil spring. The drive shaft 12 is inserted into the spring portion 13. One end of the spring portion 13, i.e., the torsion coil spring, is fixed to the locking portion 14 provided on the drive shaft 12. In addition, the other end of the spring portion 13, i.e., the torsion coil spring, is fixed to the fixing portion 15 located at the lower part of the elevator car 1.

[0039] It should be noted that in this embodiment, the spring part 13 and the fixing part 15 are located inside the frame 200.

[0040] When the electric actuator 10 is activated and the drive shaft 12 rotates, the spring portion 13 is subjected to a torsional torque, accumulating bending elastic energy around the central axis of the spring portion 13. When the elevator device is in normal operation, the electric actuator 10 constrains the movement of the rotating shaft 22, which is connected to the drive shaft 12 via a linkage mechanism, by restricting the movement of the drive shaft 12 while the spring portion 13 has accumulated bending elastic energy.

[0041] When the speed detection device detects that the descent speed of the elevator car 1 exceeds the specified overspeed, the electric operator 10 releases the constraint on the drive shaft 12. This releases the bending elastic energy of the spring portion 13. In this embodiment, the drive shaft 12 is inserted into the spring portion 13, so the central axis of the spring portion 13 is substantially aligned with the rotational central axis of the drive shaft 12. Therefore, when the bending elastic energy of the spring portion 13 is released, the drive shaft 12 rotates in the opposite direction to the rotational direction in which the bending elastic energy was stored in the spring portion 13, due to the force of the spring portion 13. The emergency stop device 2 operates in conjunction with this rotation.

[0042] In this embodiment, the fixing part 15 has a spring force adjustment mechanism that adjusts the force of the torsion coil spring by adjusting the torsion angle of the torsion coil spring. Therefore, in this embodiment, the magnitude of the bending elastic energy stored in the spring part 13 and the magnitude of the force of the spring part 13 corresponding to the bending elastic energy can be adjusted without rotating the drive shaft 12.

[0043] It should be noted that the details of the structure and operation of the electric actuator 10 will be described later.

[0044] One emergency stop device 2 is installed on each side of the elevator car 1. Each emergency stop device 2 is equipped with a pair of brake components that are movable between a braking position and a non-braking position, clamping the guide rail 4 in the braking position. Furthermore, when the emergency stop device 2 rises relative to the elevator car 1 due to the car's descent, braking force is generated through the friction between the brake components and the guide rail 4. Thus, the emergency stop device 2 activates when the elevator car 1 enters an overspeed state, bringing the elevator car 1 to an emergency stop.

[0045] The elevator device of this embodiment has a so-called cableless speed controller system that does not use a speed controller cable. When the elevator car 1's lifting speed 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. Furthermore, when the elevator car 1's descent speed reaches a second overspeed (e.g., a speed not exceeding 1.4 times the rated speed), the electric operator 10 installed in the elevator car 1 activates the emergency stop device 2, causing the elevator car 1 to stop urgently.

[0046] In this embodiment, the cableless speed controller system comprises the aforementioned speed detection device and a safety control device (not shown). The safety control device determines the overspeed state of the elevator car 1 based on the output signal of the speed detection device. The safety control device measures the speed of the elevator car 1 based on the output signal of the speed detection device. 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 that controls the drive unit. Furthermore, when it determines that the measured speed has reached a second overspeed, the safety control device outputs a command signal to activate the electric operator 10.

[0047] Figure 2 This indicates the structure of the emergency stop device 2 and the electric actuator 10 in this embodiment. Figure 1 View A in the diagram.

[0048] exist Figure 2 The elevator car 1 is also described in the description. In the elevator car 1, a car compartment 51 is mounted on the car floor 52 supported by the car frame 60. A car door 53 is provided on the side of the car compartment 51 facing the waiting hall.

[0049] An emergency stop device 2 is provided at the lower end of the longitudinal frame of the car frame 60. An electric operator 10 is disposed adjacent to the emergency stop device 2 at the lower part of the elevator car 1, i.e., below the car floor 52. The electric operator 10 includes a movable part 34 and an electromagnet part 35. The movable part 34 consists of an adsorption part 34A attracted by the energized electromagnet part 35 and a support part 34B that supports the adsorption part 34A and is mechanically linked to the emergency stop device 2.

[0050] In the emergency stop device 2, a pair of braking elements 201 are mounted on a base portion 202. When the lifting rod 203 fixed to the base portion 202 is driven upward in the figure, the braking elements 201 are lifted to the braking position through the base portion 202.

[0051] When the drive shaft 12 passes through the spring part 13 ( Figure 1 When the drive shaft 12 rotates under the action of the force, the lifting rod 102, which is fixed to the axial end of the drive shaft 12, rotates with the drive shaft 12 as the pivot point. The lifting rod 102 and the connecting member 101, which is rotatably connected to the lifting rod 203 at the connecting part 111, are rotatably connected to each other at the connecting part 112. Therefore, when the drive shaft 12 rotates and the lifting rod 102 rotates, the lifting rod 102 drives the lifting rod 203 upward via the connecting member 101. At this time, a pair of braking members 201 mounted on the base part 202 fixed to the lifting rod 203 are lifted to the braking position.

[0052] When the elevator car 1 is in normal operation, the movable part 34 of the electric operator 10 is attracted to the energized electromagnet part 35. As a result, the electric operator 10, through a linkage mechanism mechanically connected to the movable part 34 and the drive shaft 12, restrains the movement of the drive shaft 12 against the force of the spring part 13.

[0053] The linkage mechanism is composed of multiple (four in this embodiment) components (103-106). A drive shaft 12 passes through one end of the first linkage portion 103 along its length. One end of the first linkage portion 103 along its length is fixed to the drive shaft 12. Therefore, the drive shaft 12 becomes the fulcrum for the rotation of the lifting rod 102 and the first linkage portion 103.

[0054] The other end of the first link 103 along its length is connected to one end of the second link 104 along its length in a rotatable manner at the connecting portion 113. The other end of the second link 104 along its length is connected to one end of the third link 105 along its length in a rotatable manner at the connecting portion 114.

[0055] The other end of the third link 105 along its length is fixed to the axial end of the rotation shaft 22. The rotation shaft 22 passes through one end of the L-shaped fourth link 106. One end of the fourth link 106 is fixed to the rotation shaft 22. Therefore, the rotation shaft 22 becomes the fulcrum for the rotation of both the third link 105 and the fourth link 106. The other end of the fourth link 106 is connected to the support portion 34B of the movable portion 34 at the connection portion 110 in a manner that allows rotation between them.

[0056] It should be noted that the rotating shaft 22 is located at the lower part of the elevator car 1, that is, below the car floor 52, and is fixed to the support part (not shown) of the elevator car 1 so that it can rotate.

[0057] With such a linkage mechanism, the electric operator 10 can be configured adjacent to the emergency stop device 2 in the narrow space below the car floor 52.

[0058] Figure 3 This indicates that the electric actuator 10 is in the non-operating state when the emergency stop device 2 is in operation. Figure 1 The diagram shows the mechanical structure of the elevator. It should be noted that since the emergency stop device 2 is in a non-operating state, the electric operator 10 is also in a non-operating state (standby state). That is, the elevator system is in normal operating condition.

[0059] As mentioned above (refer to) Figure 2 The electric actuator 10 includes a movable part 34 and an electromagnet part 35. The movable part 34 is attached to an adsorption part 34A by the energized electromagnet part 35 and a support adsorption part 34A, and is connected to a linkage mechanism ( Figure 2 It consists of a support part 34B that is mechanically connected to the emergency stop device 2 (103~106 in the middle).

[0060] It should be noted that, in Figure 3 The image shows a linkage mechanism that mechanically connects the emergency stop device 2 to the movable part 34. Figure 2 The third link 105 and the fourth link 106 in (103~106).

[0061] The electromagnet part 35, which is attracted to the movable part 34 by electromagnetic force, has an electromagnet core part 35A with its magnetic pole face facing the movable part 34 and an electromagnet support plate 35B for fixing the electromagnet core part 35A. It should be noted that, in the movable part 34, at least the attraction part 34A attracted by the electromagnet part 35 is made of a magnetic material.

[0062] The electric actuator 10 includes: a feed screw 36 (e.g., a trapezoidal screw) which is supported for rotation by a first support member 41 and a second support member 42 fixed below the car floor portion 52 to the elevator car 1; and a motor 37 that drives the feed screw 36 to rotate. It should be noted that the first support member 41 and the second support member 42 may also be fixed to the elevator car 1 below the car floor portion 52 via a base member.

[0063] The feed screw 36 engages with the feed nut 35C of the electromagnet part 35. When the motor 37 rotates the feed screw 36, the rotation of the motor 37 is converted into linear movement of the electromagnet part 35 along the axial direction of the feed screw 36 by the rotating feed screw 36 and the feed nut 35C of the electromagnet part 35.

[0064] like Figure 3 As shown, in the standby state, the movable part 34 is attracted to the energized electromagnet part 35. The electromagnet part 35 is located in a predetermined position in the standby state. At this time, the spring part 13 ( Figure 1 The force of the spring 13 acts on the drive shaft 12, causing the brake 201 of the emergency stop device 2 to rotate in the lifting direction. At this time, since the movable part 34 is attracted by the electromagnet part 35, the electric actuator 10 resists the force of the spring part 13 and restrains the drive shaft 12 from rotating.

[0065] exist Figure 3 In the standby state shown, when an overspeed condition of the elevator car 1 is detected, the electromagnet 35 is stopped from energizing according to a command from a safety control device (not shown). Therefore, the attractive force acting on the movable part 34 disappears, and the constraint on the drive shaft 12 is released. The drive shaft 12 then passes through the spring part 13 (… Figure 1The electromagnet rotates under the force of the feed screw 36. This causes the brake 201 of the emergency stop device 2 to be lifted. At this time, the movable part 34, mechanically connected to the emergency stop device 2 via a linkage mechanism, moves away from the electromagnet part 35 along the length of the feed screw 36. It should be noted that the electromagnet part 35 remains in a predetermined position in the standby state.

[0066] To return the electric actuator 10 to standby mode, the drive motor 37 first rotates the feed screw 36. Through the rotating feed screw 36 and the feed nut 35C of the electromagnet part 35 fixed to the electromagnet support plate 35B, the rotation of the motor 37 is converted into linear movement of the electromagnet part 35 along the axial direction of the feed screw 36. As a result, the electromagnet part 35 approaches and contacts the movable part 34, which is in the operating position.

[0067] If contact between the electromagnet 35 and the movable part 34 is detected by a switch, sensor, or the load current of the motor 37 (not shown), the electromagnet 35 is energized, and the motor 37 is stopped. The movable part 34 is attracted to the electromagnet 35 by electromagnetic force. While the movable part 34 is attracted to the electromagnet 35, the energization of the electromagnet 35 continues, and the rotation direction of the motor 37 is reversed, causing the feed screw 36 to reverse. Thus, the movable part 34 and the electromagnet 35 move together to... Figure 3 The specified position in the standby state is shown.

[0068] It should be noted that the electromagnet part 35 can also be energized when it approaches the movable part 34 which is in the operating position.

[0069] When the electromagnet 35 or the movable part 34 reaches a predetermined position in the standby state, detected by a switch or sensor (not shown), the motor 37 stops. Excitation of the electromagnet 35 resumes.

[0070] The movable part 34 moves from the operating position to a predetermined position in the standby state. Figure 3 During the period of ), through the linkage mechanism ( Figure 2 (103-106) The drive shaft 12 rotates in the opposite direction to when the emergency stop device 2 is activated. Therefore, the spring part 13 (composed of a torsion coil spring) Figure 1 When subjected to torsional torque, the spring portion 13 stores bending elastic energy around its central axis. Therefore, the spring portion 13 releases bending elastic energy when the electric actuator 10 is activated, and then stores bending elastic energy when the electric actuator returns to the standby state.

[0071] In this embodiment, the length direction of the drive shaft 12 and the length direction of the feed screw 36, i.e., the length direction of the electric operator, in the drive mechanism are both configured to be parallel to the lower surface of the elevator car 1 (e.g., the car floor). This reduces the space occupied by the drive mechanism of the emergency stop device 2 and the electric operator 10.

[0072] Figure 4 This indicates the structure of the spring portion 13 in this embodiment. Figure 1 View B in the diagram.

[0073] As described above, in this embodiment, the spring part 13 is composed of a torsion helical spring, and the drive shaft 12 is inserted into the spring part 13.

[0074] The drive shaft 12 passes through a locking portion 14 that secures one end of a torsion coil spring. The distance from the end of the locking portion 14, which secures one end 13A of the torsion coil spring, to the center of rotation of the drive shaft 12 is greater than the radius of the torsion coil spring. The locking portion 14 is fixed to the drive shaft 12. Therefore, the locking portion 14 rotates together with the drive shaft 12.

[0075] The drive shaft 12 passes through the fixing part 15, which is used to fix the other end 13B of the torsion coil spring, in a rotatable and sliding manner. The distance from the end of the fixing part 15, which is used to fix the other end 13B of the torsion coil spring, to the rotation center of the drive shaft 12 is greater than the radius of the torsion coil spring. The abutment part 53 of the spring force adjustment mechanism 70, which will be described later, contacts the end of the fixing part 15, which is used to fix one end of the torsion coil spring.

[0076] It should be noted that, in this embodiment, the drive shaft 12 is supported by the frame 200 so that it can rotate.

[0077] Figure 5 This indicates the structure of the spring section 13 and the spring force adjustment mechanism 70 in this embodiment. Figure 1 The view is shown in section C. It should be noted that in this embodiment, the spring force adjustment mechanism 70 adjusts the force of the torsion coil spring by adjusting the torsion angle of the torsion coil spring.

[0078] The spring force adjustment mechanism 70 consists of a bolt 71, a nut 72 that engages with the bolt 71, and an abutment portion 73 located at the shaft end of the bolt 71 and in contact with the fixing part 15. It should be noted that the abutment portion 73 can also be the front end of the bolt 71.

[0079] Nut 72 fixes the center of bolt 71 to the position directly below the other end 13B of the torsion spring and directly below the end of the fixing part 15 for fixing the other end 13B of the torsion spring. It should be noted that in this embodiment, nut 72 is fixed to frame 200.

[0080] When adjusting the torsion angle of the spring section 13 in order to adjust the force of the spring section 13, in the standby state of the electric actuator 10, that is, in the state where the movement of the drive shaft 12 is constrained, the bolt 71 that engages with the nut 72 is rotated to change the length of the shaft of the bolt 71 located between the other end 13B of the torsion coil spring and the end of the fixing part 15 that fixes the other end 13B of the torsion coil spring and the nut 72.

[0081] As described above, the locking portion 14 is fixed to the drive shaft 12. That is, one end 13A of the torsion coil spring is fixed relative to the drive shaft 12. Furthermore, as described above, the drive shaft 12 passes through the fixed portion 15 in a rotatable and slidable manner. That is, one end 13A of the torsion coil spring is fixed relative to the drive shaft 12.

[0082] Therefore, when the length of the shaft of the bolt 71 located between the end of the fixing part 15 and the nut 72 is changed and the fixing part 15, which is in contact with the abutment part 73, rotates around the drive shaft 12, the position of the other end 13B of the torsion coil spring can be changed in the vertical direction in this embodiment, while the movement of the drive shaft 12 is constrained.

[0083] That is, the torsion angle of the torsion coil spring can be adjusted without rotating the drive shaft 12. Therefore, the force of the spring portion 13 hanging on the drive shaft 12 can be adjusted without changing the lifting stroke of the pair of brakes 201 in the emergency stop device 2.

[0084] Figure 6 This indicates the structure of the spring section 13 and the spring force adjustment mechanism 70 in this embodiment. Figure 1 The C-direction view in the image. Figure 6 The spring section 13 indicates that the torsion angle has been adjusted.

[0085] like Figure 6 As shown, the length ratio of the bolt 71 between the end of the fixing part 15, which is located at the other end 13B of the torsion coil spring, and the nut 72 is... Figure 5 The situation is prolonged. Therefore, the fixing part 15 rotates, and the other end 13B of the torsion coil spring fixed to the fixing part 15 is pushed up. In contrast, the position of the end 13A of the torsion coil spring fixed to the locking part 14 is constrained and does not change due to the movement of the drive shaft 12. Therefore, the torsion angle of the torsion coil spring is changed.

[0086] According to the above embodiment, by having a spring force adjustment mechanism that adjusts the force of the spring section 13 without rotating the drive shaft 12, the force of the spring section 13 can be adjusted without changing the lifting stroke of the brake member 201 of the emergency stop device 2. The drive shaft 12 rotates by utilizing the force of the spring section 13 to activate the emergency stop device 2.

[0087] Furthermore, according to the above embodiment, the drive shaft 12 is inserted into the torsion coil spring, one end 13A of the coil torsion coil spring is fixed to the drive shaft 12, and the other end 13B of the torsion coil spring is fixed to the fixing part 15 through which the drive shaft 12 can rotate and slide. A spring force adjustment mechanism is also provided, which adjusts the torsion angle of the torsion coil spring by rotating the fixing part 15. Thus, the force of the spring part 13 can be adjusted without changing the lifting stroke of the brake member 201 of the emergency stop device 2, and the space occupied by the drive mechanism can be reduced. Such a drive mechanism, as in the above embodiment, is suitable for elevator systems where the drive mechanism and the electric operator 10 are located in the lower part of the elevator car 1.

[0088] The electric actuator 10 is not limited to the above embodiment as long as it restrains the drive shaft 12 against the force of the spring part 13; it may also have other structures. For example, it may have the structure described in the above-mentioned Patent Document 2.

[0089] It should be noted that the present invention is not limited to the embodiments described above, and includes various modifications. For example, the embodiments described above have been given in detail for the purpose of easily understanding the present invention, and are not necessarily limited to having all the structures described. In addition, for a part of the structure of the embodiments, other structures can be added, deleted, or replaced.

[0090] For example, the electric operator 10 can also be installed on the car.

[0091] In addition, elevator systems may also have a machine room.

[0092] Explanation of reference numerals in the attached figures:

[0093] 1…Elevator car, 2…Emergency stop device, 3…Main hoisting cable, 4…Guide rail, 5…Car lower pulley, 10…Electric operator, 12…Drive shaft, 13…Spring part, 14…Clack part, 15…Fixing part, 16…First support part, 17…Second support part, 22…Rotating shaft, 34…Modible part, 34A…Adsorption part, 34B…Support part, 35…Electromagnet part, 35A…Electromagnet core part, 35B…Electromagnet support plate, 35C…Feed nut, 36…Feed screw, 37…Motor, 41…First support structure Components, 42…second support component, 51…car compartment, 52…car floor, 53…car door, 60…car frame, 70…spring force adjustment mechanism, 71…bolt, 72…nut, 73…, 101…connecting component, 102…lifting rod, 103…first connecting rod, 104…second connecting rod, 105…third connecting rod, 106…fourth connecting rod, 110, 111, 112, 113, 114…connecting part, 200…frame, 201…brake component, 202…base part, 203…lifting bar.

Claims

1. An elevator device comprising: Elevator car; An emergency stop device is installed in the elevator car; A drive mechanism, disposed in the elevator car, actuates the emergency stop device; and An electric actuator that actuates the drive mechanism. Its features are, The drive mechanism includes: Spring section; and The drive shaft rotates by the force of the spring, thereby activating the emergency stop device. The electric actuator constrains the drive shaft by resisting the force exerted by the spring. When the electric actuator releases the constraint on the drive shaft, the drive shaft rotates due to the force exerted by the spring. The elevator device includes a spring force adjustment mechanism that adjusts the force of the spring without rotating the drive shaft.

2. The elevator device according to claim 1, characterized in that, The spring section has a torsion spring. The spring force adjustment mechanism adjusts the torsion angle of the torsion spring.

3. The elevator device according to claim 2, characterized in that, The torsion spring is a torsion helical spring. The drive shaft is inserted into the torsion coil spring. One end of the torsion helical spring is fixed to the drive shaft. The spring force adjustment mechanism adjusts the torsion angle by moving the other end of the torsion helical spring.

4. The elevator device according to claim 3, characterized in that, The other end of the torsion coil spring is fixed to a fixed part through which the drive shaft can rotate and slide. The spring force adjustment mechanism moves the other end of the torsion coil spring by rotating the fixed part.

5. The elevator device according to claim 1, characterized in that, The electric actuator includes: A movable part, which is mechanically connected to the drive shaft via a linkage; and The electromagnet part is positioned opposite the movable part. In standby mode, the electric actuator energizes the electromagnet and attracts the movable part to the electromagnet, thereby restraining the drive shaft by resisting the force of the spring.

6. The elevator device according to claim 1, characterized in that, The drive mechanism and the electric actuator are located at the bottom of the elevator car.

7. An elevator device comprising: Elevator car; An emergency stop device is installed in the elevator car; A drive mechanism, disposed in the elevator car, actuates the emergency stop device; and An electric actuator that actuates the drive mechanism. Its features are, The drive mechanism includes: Spring section; and The drive shaft rotates by the force of the spring, thereby activating the emergency stop device. The electric actuator constrains the drive shaft by resisting the force exerted by the spring. When the electric actuator releases the constraint on the drive shaft, the drive shaft rotates due to the force exerted by the spring. The spring section has a torsion helical spring. The drive shaft is inserted into the torsion coil spring. One end of the torsion helical spring is fixed to the drive shaft. The other end of the torsion coil spring is fixed to a fixed part through which the drive shaft can rotate and slide. The elevator device includes a spring force adjustment mechanism, which adjusts the force of the spring by rotating the fixed part.

8. The elevator device according to claim 7, characterized in that, The drive mechanism and the electric actuator are located at the bottom of the elevator car.

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