Elevator arrangement

Abstract

Disclosed is an elevator device provided with an electric emergency stop device that is highly flexible in terms of installation and suitable for space saving. The elevator device is provided with: an elevator car (1); an emergency stop device (2) provided in the elevator car; and an electric actuator (10) provided in the elevator car to actuate the emergency stop device. The electric actuator is provided with: a movable member; an electromagnet that attracts the movable member in a standby state of the electric actuator; a rod-shaped member connected to the movable member; and a brake member activation member (100) connected to an end portion of the rod-shaped member, which pushes up a brake member (200) of the emergency stop device when excitation of the electromagnet is stopped and the rod-shaped member is driven.

Description

Technical Field

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

[0002] In elevator systems, a speed controller and an emergency stop device are included to continuously monitor the elevator car's ascending and descending speed and to ensure the elevator car stops immediately if it falls into a specified overspeed condition. Typically, the elevator car and speed controller are connected by a speed controller cable. When an overspeed condition is detected, the speed controller, by restraining the speed controller cable, activates the emergency stop device on the elevator car side, 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 it difficult to save space and reduce costs. Furthermore, when the governor cables swing, interference can easily occur between the structures within the elevator shaft and the governor cables.

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

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

[0006] In this prior art, an elevator car is equipped with a drive shaft that drives an emergency stop device and a working mechanism that operates the drive shaft. The working mechanism has a movable iron core mechanically connected to the drive shaft via a connecting piece and an electromagnet that attracts the movable iron core. The drive shaft is driven by a spring, but under normal conditions, the movement of the drive shaft is constrained by the working mechanism because the electromagnet is energized and attracts the movable iron core.

[0007] In an emergency, the electromagnet is demagnetized, releasing the drive shaft from its constraint. The drive shaft is then driven by the force of the drive spring. Consequently, the emergency stop device's lever is pulled up, activating the emergency stop device and bringing the elevator car to an emergency stop.

[0008] Furthermore, when restoring the emergency stop device to its normal state, the electromagnet is moved to approach the movable iron core that moved during the 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 to the electromagnet, the electromagnet is driven to return both the movable iron core and the electromagnet to their normal standby position. It should be noted that the electromagnet's moving mechanism includes a feed screw shaft engaged with the electromagnet and a motor that rotates the feed screw shaft.

[0009] Prior art literature

[0010] Patent documents

[0011] Patent Document 1: International Publication No. 2020 / 110437 Summary of the Invention

[0012] The problem that the invention aims to solve

[0013] In the aforementioned prior art, since the working mechanism is configured as a lifting rod for lifting the emergency stop device, the freedom of setting the working mechanism is limited, or the setting space of the working mechanism becomes larger.

[0014] Therefore, the present invention provides an elevator device with an electric emergency stop device that allows for greater freedom of installation and is suitable for space saving.

[0015] Solution for solving the problem

[0016] To solve the above-mentioned problems, the elevator device of the present invention includes: an elevator car; an emergency stop device disposed in the elevator car; and an electric actuator disposed in the elevator car to activate the emergency stop device. The electric actuator includes: a movable member; an electromagnet that attracts the movable member in the standby state of the electric actuator; a rod connected to the movable member; and a brake actuation member connected to the end of the rod. When the excitation of the electromagnet stops and the rod is driven, the brake of the emergency stop device is pushed up by the brake actuation member.

[0017] Invention Effects

[0018] According to the present invention, the space occupied by the working mechanism of the emergency stop device can be reduced, and the degree of freedom in the setting position of the working mechanism is increased.

[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 front view showing the mechanism of the electric actuator in the embodiment.

[0022] Figure 3 This is a front view showing the mechanism of the electric actuator in the embodiment.

[0023] Figure 4 This is a side view showing the mechanism of the electric actuator in the embodiment.

[0024] Figure 5 This is a side view showing the mechanism of the electric actuator in a modified example. Detailed Implementation

[0025] Hereinafter, according to an embodiment, while using the attached Figure 1 The elevator device according to one embodiment of the present invention will be described below. It should be noted that in the various figures, the same reference numerals indicate the same constituent elements or constituent elements having similar functions.

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

[0027] like Figure 1 As shown, the elevator system includes an elevator car 1, an electric actuator 10, a drive mechanism (12, 100, etc.), and an emergency stop device 2.

[0028] The elevator car 1 is suspended in the elevator shaft located in the building by a main hoisting cable (not shown), and is slidably engaged with the guide rail 4 via a guide device (not shown). When the main hoisting cable is driven by friction by a drive device (winch: not shown), the elevator car 1 moves up and down in the elevator shaft.

[0029] The elevator car 1 is equipped with a speed detection device (not shown) that 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 prescribed overspeed limit.

[0030] 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.

[0031] It should be noted that the speed detection device can also calculate the speed of the elevator car based on the output signal of the rotary encoder that rotates as the elevator car moves.

[0032] 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, 100, etc.) is also located at the lower part of the elevator car 1.

[0033] When the electric actuator 10 is working, the brake member 200 of the emergency stop device 2 is pushed up by the brake member starting member 100. That is, the brake member 200 is activated by the brake member starting member 100. As a result, the emergency stop device 2 is activated.

[0034] It should be noted that details about the electric actuator 10 and the drive mechanism (12, 100, etc.) will be described later.

[0035] One emergency stop device 2 is installed on each side of the elevator car 1. Each emergency stop device 2 has a pair of brake members 200 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 its descent, it generates braking force through the friction between the brake members 200 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.

[0036] 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 controlling 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 actuator 10 installed in the elevator car 1 activates the emergency stop device 2, causing the elevator car 1 to stop urgently.

[0037] In this embodiment, the cableless speed controller system comprises the aforementioned speed detection device and a safety control device that determines the overspeed state of the elevator car 1 based on the output signal of the speed detection device. This 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 actuator 10.

[0038] As described above, when the pair of brakes in the emergency stop device 2 are activated by the brake activation member 100, the pair of brakes clamp the guide rail 4.

[0039] Figure 2 This shows the mechanism of the electric actuator 10 and drive mechanism in this embodiment. Figure 1 The main view in settings. It should be noted that, in... Figure 2 In this configuration, the emergency stop device is in a non-braking state, and the electric actuator 10 is in a non-operating state (standby state). That is, the elevator system is in its normal state.

[0040] When the elevator is in normal operation, the electric actuator 10 is in a standby state. In the standby state, the movable member 34 is attracted by the energized electromagnet 35. As a result, the movement of the connecting bracket 38, which connects the movable member 34 and the pressing member 15 (spring seat), is constrained, overcoming the force of the drive spring 13 (compression spring). It should be noted that at least the portion of the movable member 34 that is attracted by the electromagnet 35 is made of a magnetic material.

[0041] A rod-shaped member 21 passes through a pressing member 15. The pressing member 15 is fixed to the rod-shaped member 21. A fixing member 14 is fixed to a structural member (not shown) of the elevator car 1 located below the car, such as the car's lower frame. The rod-shaped member 21 slidably passes through the fixing member 14. The rod-shaped member 21 passes through a drive spring 13. The drive spring 13 is located between the fixing member 14 and the pressing member 15. One end and the other end of the drive spring 13 abut against the fixing member 14 and the pressing member 15, respectively. In the standby state of the electric actuator 10, the drive spring 13 is pressed by the fixing member 14 and the pressing member 15. Therefore, the drive spring 13 is compressed, accumulating elastic energy. For example, the drive spring 13 stores force.

[0042] A rod-shaped member 21 is connected to each of the left and right brake starting components 100. Each rod-shaped member 21 can move in conjunction with a linkage mechanism consisting of a connecting rod 12 and a connecting rod pin 30.

[0043] In this embodiment, the brake starting member 100 has a tapered portion, and the tapered surface contacts the bottom of the brake member 200.

[0044] In this embodiment, the brake actuation member 100 is composed of a rod-shaped metal member. Block-shaped members, bent plate-shaped members, etc., can be used as the metal member. It should be noted that, as long as it has sufficient strength to support and push the brake member 200, it is not limited to a rod-shaped metal member; members of various shapes and materials can be used.

[0045] Figure 3 This shows the mechanism of the electric actuator 10 and drive mechanism in this embodiment. Figure 1 The main view in settings. It should be noted that, in... Figure 3 In this configuration, the emergency stop device is in the braking state, and the electric actuator 10 is in the working state. That is, the elevator system is in the stopped state.

[0046] According to the command from the safety control device (not shown), when the excitation of the electromagnet 35 stops, the attractive force acting on the movable member 34 disappears, and therefore the force of the drive spring 13 is released, driving the rod-shaped member 21. At this time, the rod-shaped member 21, which is not connected to the connecting bracket 38, is also driven in conjunction through the linkage mechanism. As a result, the brake member 200 is pushed up by the conical surface of the brake member actuation member 100.

[0047] To return the electric worker 10 to standby mode, the electric worker 10 is activated as described below.

[0048] The electric actuator 10 has a feed screw 36 (e.g., a trapezoidal screw) located on a flat portion of the base plate for driving the movable member 34. The feed screw 36 is supported by a first support member 41 and a second support member 42 fixed on the flat surface of the base plate and is rotatable. The electromagnet 35 has a nut portion that engages with the feed screw 36. The feed screw 36 is driven to rotate by a motor 37.

[0049] It should be noted that, as the base plate, a plate-shaped component such as a metal plate can be used, or a flat part of the steel that constitutes the lower frame of the car can be used.

[0050] To return the electric actuator 10 to standby mode, firstly, the drive motor 37 rotates the feed screw 36. Through the rotating feed screw 36 and the nut portion of the electromagnet 35, the rotation of the motor 37 is converted into linear movement of the electromagnet 35 along the axial direction of the feed screw 36. As a result, the electromagnet 35 approaches and contacts the movable member 34. If the contact between the electromagnet 35 and the movable member 34 is detected by a switch (not shown) or the load current of the motor 37, the electromagnet 35 is energized, and the motor 37 is stopped. The movable member 34 is attracted to the electromagnet 35 under the action of electromagnetic force. While the movable member 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 member 34 and the electromagnet 35 move together to the standby position.

[0051] Figure 4 This shows the mechanism of the electric actuator 10 in this embodiment. Figure 1 The side view in the settings state. That is, Figure 4 yes Figure 2 A-view diagram in the image.

[0052] like Figure 4 As shown, the rod-shaped member 21 extends directly below the pair of brake members 200. Therefore, the brake member starting member 100, which is connected to the end of the rod-shaped member 21, is in direct contact with the brake member 200.

[0053] It should be noted that the emergency stop device in this embodiment differs from prior art emergency stop devices in that it does not have a lifting rod extending along the height direction of the elevator car in the length direction. Other structural features are the same as prior art emergency stop devices. For example, as... Figure 4 As shown, the brake element 200 and the leaf spring and other elastic bodies that press the brake element 200 are housed in the housing 201 (or frame).

[0054] Figure 5 This shows the mechanism of the electric actuator 10 in an elevator device as a modified example, and... Figure 4 Same side view.

[0055] In this modified example, a rod 203 is connected to the lower part of a pair of brake members 200. The rod 203 extends laterally to the pair of brake members 200, that is, in a direction perpendicular to the length direction of the rod-shaped member 21 from the lower part of the brake members 200. The end of the extension of the rod 203, i.e., the free end, contacts the conical surface of the brake member starting member 100.

[0056] In this modified example, rod 203 is pushed up by brake actuation member 100, thereby pushing brake member 200 up.

[0057] According to the above embodiments, since the brake member 200 is pushed up by the brake member starting member 100, the space occupied by the working mechanism (electric actuator 10 and drive mechanism (12, 200, etc.)) of the emergency stop device can be reduced, and the degree of freedom in the setting position of the working mechanism is increased.

[0058] It should be noted that the present invention is not limited to the embodiments described above, but includes various modifications. For example, the embodiments described above have been explained in detail for ease of understanding of the present invention, but are not necessarily limited to having all the described structures. In addition, other structures can be added, deleted, or replaced in a part of the structure of the embodiments.

[0059] For example, if the emergency stop device is located above the car, the electric actuator can be located on the car.

[0060] In addition, elevator units can have a machine room or be so-called machine room-less elevators.

[0061] Explanation of reference numerals in the attached figures:

[0062] 1…Elevator car; 2…Emergency stop device; 4…Guide rail; 10…Electric actuator; 12…Connecting rod; 13…Drive spring; 14…Fixing component; 15…Pressing component; 21…Bar-shaped component; 30…Connecting rod pin; 34…Movable component; 35…Electromagnet; 36…Feed screw; 37…Motor; 38…Connecting bracket; 41…Supporting component; 42…Supporting component; 100…Brake / starting component; 200…Brake; 203…Rod.

Claims

1. An elevator device comprising: Elevator car; The first emergency stop device and the second emergency stop device are located on the left and right sides below the elevator car; and An electric actuator, installed in the elevator car, activates the emergency stop device. Its features are, The electric actuator includes: Movable components; An electromagnet, which attracts the movable component in the standby state of the electric actuator; A first rod-shaped member is connected to the movable member; The first braking component is a starting member, which is connected to the end of the first rod-shaped member; The second rod-shaped member is capable of being linked with the first rod-shaped member via a linkage mechanism; and The second braking element is a starting component, which is connected to the end of the second rod-shaped member. When the electromagnet stops excitation and the first rod is driven, the brake of the first emergency stop device is pushed up by the first brake starting member, and the second rod, which is linked to the first rod, is driven, and the brake of the second emergency stop device is pushed up by the second brake starting member. The electric actuator includes: The feed screw engages with the electromagnet; and A motor drives the feed screw to rotate. The electric actuator is located below the elevator car. The first and second rod-shaped members are arranged parallel to the feed screw in the length direction.

2. The elevator device according to claim 1, characterized in that, The first braking component starting member and the second braking component starting member have conical surfaces. The braking element is pushed up by the conical surface.

3. The elevator device according to claim 2, characterized in that, The conical surface is in direct contact with the lower part of the braking component.

4. The elevator device according to claim 2, characterized in that, The conical surface contacts the rod that is connected to the brake and extends laterally toward the brake.

5. The elevator device according to claim 1, characterized in that, The first and second rod-shaped members are driven by spring force.

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