Elevator arrangement

Abstract

Disclosed is an elevator device capable of improving the reliability of operation in a setting environment of an electric operator for operating an emergency stop device. The elevator device includes a car (1), an emergency stop device (2) provided on the car, and an electric operator (10) provided on the car and operating the emergency stop device, the electric operator having a housing (30), a mechanism portion inside the housing, and an operating lever (11) connected to the mechanism portion and extending from the inside of the housing to the outside of the housing through an opening portion of the housing, the housing having a cover member (32) covering the opening portion, the operating lever being inserted through the cover member.

Description

Technical Field

[0001] This invention relates to an elevator device including an emergency stop device operated by an electric actuator. Background Technology

[0002] To continuously monitor the car's ascending and descending speed and to ensure an emergency stop if the car enters a specified overspeed condition, the elevator system is equipped with a speed governor and an emergency stop device. Normally, the car and the speed governor are connected by a speed governor rope. When an overspeed condition is detected, the speed governor, by restraining the speed governor rope, activates the emergency stop device on the car side, thereby bringing the car to an emergency stop.

[0003] In such elevator systems, the presence of a long, thin governor rope within the shaft makes it difficult to save space and reduce costs. Furthermore, when the governor rope sways, it can easily interfere with other structures within the shaft.

[0004] In response, an emergency stop device that does not require the use of a speed limiter rope was proposed.

[0005] As prior art concerning emergency stop devices that do not use a speed limiter rope, the technology described in Patent Document 1 is known. In this prior art, a braking unit with a wedge-shaped brake shoe is provided at the lower part of the car, and a brake linkage is connected to the brake shoe. When the solenoid operates according to the command from the control unit, the brake linkage moves upward through a mechanism linked to the solenoid. Therefore, the brake shoe is pulled upward and brakes the car.

[0006] Existing technical documents

[0007] Patent documents

[0008] Patent Document 1: Japanese Patent Application Publication No. 2013-189283 Summary of the Invention

[0009] The technical problem that the invention aims to solve

[0010] As described above, in conventional emergency stop devices that operate by means of a solenoid, the reliability of operation may be reduced when dust adheres to the movable part of the operator in the installation environment, or when the movable part is damaged due to contact with an object.

[0011] Therefore, the present invention provides an elevator device including an emergency stop device, which can improve the reliability of the operation of the electric actuator in the installation environment.

[0012] Technical solutions adopted to solve technical problems

[0013] To solve the above problems, the elevator device of the present invention includes: a car; an emergency stop device disposed on the car; and an electric operator disposed on the upper part of the car and for activating the emergency stop device. The electric operator includes: a housing; a mechanism located inside the housing; and an operating lever connected to the mechanism, the operating lever extending from the inside of the housing through an opening on the housing to the outside of the housing. The housing has a covering member covering the opening, and the operating lever is inserted through the covering member.

[0014] Invention Effects

[0015] According to the present invention, the reliability of the operation of electric actuators in the setting environment can be improved.

[0016] The problems, structures, and effects beyond those described above become clearer through the following description of the implementation methods. Attached Figure Description

[0017] Figure 1 This is a simplified structural diagram of an elevator device according to one embodiment.

[0018] Figure 2 This is a front view of the mechanism housed within the housing of the electric actuator, illustrating an embodiment.

[0019] Figure 3 This is a front view of the mechanism housed within the housing of the electric actuator, illustrating an embodiment.

[0020] Figure 4 This is a top view of the electric actuator showing the shape and fixed position of the covering member in the embodiment.

[0021] Figure 5 This is a top view of the electric actuator showing the positional relationship between the covering member and the plate-like member in the embodiment. Detailed Implementation

[0022] Hereinafter, an elevator device according to one embodiment of the present invention will be described using the accompanying drawings, based on an example. Furthermore, in the figures, components with the same reference numerals represent the same components or components having similar functions.

[0023] Figure 1 This is a simplified structural diagram of an elevator device according to one embodiment of the present invention.

[0024] like Figure 1 As shown, the elevator device includes a car 1, a position sensor 3, an electric operator 10, a drive mechanism (12-20), an upper pull rod 21, and an emergency stop device 2.

[0025] The car 1 is suspended in a hoistway (not shown) within a building by a main rope. The car 1 is slidably engaged with guide rails 4 via a guide device. The car 1 rises and falls within the hoistway by friction driven by a drive unit (traction machine: not shown).

[0026] Position sensor 3 is installed on car 1 to detect the position of car 1 within the hoistway, and continuously detects the lifting speed of car 1 based on the detected position. Therefore, position sensor 3 can detect when the lifting speed of car 1 exceeds the specified overspeed limit.

[0027] In this embodiment, the position sensor 3 includes an image sensor, which detects the position and speed of the car 1 based on image information of the surface state of the guide rail 4 acquired by the image sensor. For example, the position of the car 1 is detected by comparing the image information of the surface state of the guide rail 4, which is pre-measured and stored in a storage device, with the image information acquired by the image sensor.

[0028] Alternatively, a rotary encoder can be used as a position sensor, which is mounted on the car and rotates as the car moves.

[0029] In this embodiment, the electric actuator 10 is an electromagnetic actuator and is disposed on the upper part of the car 1. The electromagnetic actuator includes a movable element or movable rod that operates, for example, via a solenoid or electromagnet. When the position sensor 3 detects a predetermined overspeed state of the car 1, the electric actuator 10 is activated. At this time, the pull rod 21 is pulled up by the drive mechanism (12-20) connected to the operating lever 11. As a result, the emergency stop device 2 is in a braking state.

[0030] The drive mechanism (12-20) will be described later.

[0031] One emergency stop device 2 is installed on each side of the car 1. Each emergency stop device 2 has a pair of brake elements (not shown) that are movable between a braking position and a non-braking position. In the braking position, the brake elements clamp the guide rail 4, and when the car 1 rises relative to the guide rail 4, braking force is generated by the friction between the brake elements and the guide rail 4. Thus, when the car 1 enters an overspeed state, the emergency stop device 2 is activated, thereby bringing the car 1 to an emergency stop.

[0032] The elevator device in this embodiment includes a so-called cordless speed governor system that does not use a speed governor rope. If the lifting speed of the car 1 exceeds the rated speed and reaches a first overspeed (e.g., a speed not exceeding 1.3 times the rated speed), the power supply to the drive unit (traction machine) and the power supply to the control device controlling the drive unit are cut off. Furthermore, if 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 on the car 1 is electrically driven, and the emergency stop device 2 is activated, thereby bringing the car 1 to an emergency stop.

[0033] In this embodiment, the cordless speed limiter system includes the aforementioned position sensor 3 and a safety control device that determines the overspeed state of the car 1 based on the output signal of the position sensor 3. The safety control device measures the speed of the car 1 based on the output signal of the position sensor 3. When it determines that the measured speed has reached a first overspeed, it outputs a command signal to cut off the power to the drive unit (traction machine) and the power to the control device controlling 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.

[0034] As described above, when the pair of brakes of the emergency stop device 2 are pulled up by the upper lever 21, the pair of brakes clamp the guide rail 4. The upper lever 21 is driven by a drive mechanism (12-20) connected to the electric actuator 10.

[0035] The structure of the drive mechanism will be described below.

[0036] The operating lever 11 of the electric actuator 10 is connected to the first actuating member 16, forming a generally T-shaped first linkage member. The operating lever 11 and the first actuating member 16 respectively form the head and foot of the T-shape. The generally T-shaped first linkage member is rotatably supported on the upper beam 50 via the first actuating shaft 19 at the connection between the operating lever 11 and the first actuating member 16. The end of one of the pair of upper pull rods 21 (left side in the figure) is connected to the end of the first actuating member 16, which is the foot of the T-shape, on the opposite side of the connection between the operating lever 11 and the first actuating member 16.

[0037] Connector 17 and second actuator 18 are connected to form a generally T-shaped second linkage member. Connector 17 and second actuator 18 respectively form the head and foot of the T-shape. The generally T-shaped second linkage member is rotatably supported on the upper beam 50 via a second actuating shaft 20 at the connection between connector 17 and second actuator 18. The end of the other of the pair of upper pull rods 21 (on the right in the figure) is connected to the end of the second actuator 18, which is the foot of the T-shape, on the opposite side of the connection between connector 17 and second actuator 18.

[0038] The ends of the operating lever 11 extending from the inside of the housing 30 to the outside and the two ends of the connector 17, which are closer to the upper part of the car 1 than the second actuating shaft 20, are respectively connected to one end (left side in the figure) and the other end (right side in the figure) of the drive shaft 12 spanning the car 1. The drive shaft 12 slidably passes through the fixing part 14 fixed to the upper beam 50. In addition, the drive shaft 12 passes through the pressing member 15, and the pressing member is fixed to the drive shaft 12. The pressing member 15 is located on the side of the second linkage member (connector 17, second actuating member 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 passes through the drive spring 13.

[0039] When the electric actuator 10 is in operation, that is, in this embodiment, when the energization of the electromagnet is cut off, the electromagnetic force that restrains the movement of the operating lever 11 against the force of the drive spring 13 disappears. Therefore, the force exerted by the drive spring 13 on the pressing member 15 drives the drive shaft 12 along the long side. As a result, the first linkage member (operating lever 11, first actuating member 16) rotates about the first actuating axis 19, and the second linkage member (connector 17, second actuating member 18) rotates about the second actuating axis 20. Consequently, one pull rod 21 of the first actuating member 16 connected to the first linkage member is driven and pulled up, and the other pull rod 21 of the second actuating member 18 connected to the second linkage member is driven and pulled up.

[0040] In this embodiment, as described later, a flexible cover member 32 is provided on the insertion portion of the operating rod 11 on the housing cover 31, which is the upper surface of the housing 30. This prevents dust, foreign objects, etc., from entering the housing 30 that houses the mechanism portion of the electric actuator 10.

[0041] Figure 2 The mechanism portion housed within the housing 30 of the electric actuator 10 in this embodiment is shown, and is... Figure 1 The main view in settings. Figure 2 In this configuration, the emergency stop device is in a non-operating state, and the electric operator 10 is in a standby state. In other words, the elevator system is in normal operating condition.

[0042] like Figure 2 As shown, in standby mode, the armature 34 connected to the operating lever 11 is attracted by the energized electromagnet 35. Thus, the movement of the operating lever 11 is restrained against the force of the drive spring 13 (compression spring). The operating lever 11 is connected to the armature 34 via a bracket 38 rotatably mounted on the armature 34. Furthermore, at least the portion of the armature 34 that is attracted to the electromagnet 35 is composed of magnets.

[0043] The following will describe Figure 2Other departments (36, 37, 40-42) Figure 3 ).

[0044] In this embodiment, a flexible covering member 32 is provided in the opening through which the operating lever 11 is inserted in the housing cover 31, which is the upper surface of the housing 30. For example, the covering member 32 is formed of a thin sheet of rubber material. Because the covering member 32 is flexible, it will not hinder the movement of the operating lever 11 when the emergency stop device is in operation.

[0045] The covering member 32 prevents dust, foreign objects, etc., from entering the housing 30 and adhering to or contacting the mechanism. This improves the reliability of the electric actuator's operation in the installation environment (such as a shaft). Consequently, it improves the reliability of the emergency stop device's operation.

[0046] In this embodiment, the operating lever 11 is further provided with a plate-shaped member 33. The plate-shaped member 33 is fixed to the connection between the bracket 38 and the operating lever 11. The flat portion of the plate-shaped member 33 is located within the housing 30, directly below and around the opening in the housing cover 31 through which the operating lever 11 is inserted, and covers the mechanism portion located directly below the opening. Therefore, even if dust or foreign objects enter the housing 30, they can be prevented from adhering to or contacting the mechanism portion. This further improves the reliability of the operation of the electric actuator in the installation environment (such as a shaft). Consequently, the reliability of the emergency stop device is further improved.

[0047] Figure 3 The mechanism portion housed within the housing 30 of the electric actuator 10 in this embodiment is shown, and is... Figure 1 The main view in settings. Figure 3 In this configuration, the emergency stop device is in the braking state, and the electric actuator 10 is in the working state. In other words, the elevator is in a state where it has been stopped by the emergency stop device.

[0048] If the excitation of the electromagnet 35 is stopped according to the instruction from the safety control device (not shown), the attractive force acting on the armature 34 disappears, thus releasing the force of the drive spring 13 and driving the drive shaft 12. When the drive shaft 12 is driven, the operating lever 11 connected to the drive shaft 12 rotates around the first actuating axis 19, and the first actuating element 16 connected to the operating lever 11 rotates in conjunction around the first actuating axis 19. Consequently, the pull rod 21 connected to the first actuating element is pulled up.

[0049] If the operating lever 11 is rotated as described above, the armature 34 connected to the operating lever 11 moves in the direction of rotation of the operating lever 11. To return the electric actuator 10 to its original position... Figure 2 The standby state shown is as described below, through... Figure 2 The mechanism (36, 37, 40-42), whose description is omitted, moves the armature 34 from the moving position ( Figure 3 Return to the standby position. Figure 2 ).

[0050] like Figure 3 As shown, in order to drive the armature 34, the electric actuator 10 has a feed screw 36 located above the flat portion of the base plate 40. The feed screw is rotatably supported by a first support member 41 and a second support member 42 fixed on the flat surface of the base plate 40. The electromagnet 35 has a nut portion that is threadedly engaged with the feed screw 36. The feed screw 36 is rotated by a motor 37.

[0051] To return the electric actuator 10 to standby mode, firstly, the motor 37 is driven to rotate the feed screw while the electromagnet 35 is energized. Through the rotating feed screw and the nut portion of the electromagnet 35, the rotation of the motor is converted into linear movement of the electromagnet 35 along the axial direction of the feed screw. Thus, the electromagnet 35 approaches... Figure 3 The armature 34 is moved to its current position by the electromagnetic force of the electromagnet 35, which attracts the armature 34. After the armature 34 is attracted by the electromagnet 35, the electromagnet 35 continues to energize it, while simultaneously reversing the rotation direction of the motor 37, thus causing the feed screw to reverse. As a result, the armature 34 and the electromagnet 35 move together to their standby position.

[0052] In this embodiment, the plate-shaped member 33 is fixed to the operating lever 11 within the space inside the housing 30, and therefore moves together with the operating lever 11. That is, the plate-shaped member 33 does not obstruct the movement of the operating lever 11.

[0053] In this embodiment, to fix the plate-shaped member 33 to the operating lever 11, the plate-shaped member 33 and the operating lever 11 are fitted together without gaps, or are tightly connected by adhesive or bonding material. Therefore, the plate-shaped member 33 and the operating lever 11 are connected to each other without gaps in their connection. Thus, the plate-shaped member 33 reliably prevents dust, foreign matter, etc., from adhering to or contacting the mechanism.

[0054] Figure 4 This is a top view showing the shape and fixed position of the electrically operated actuator 10 with a flexible cover member 32 according to this embodiment. Figure 4 In the middle, the electric actuator is in standby mode.

[0055] The cover member 32 is fixed in a manner that covers the opening B in the housing cover 31, which is the upper surface of the housing 30.

[0056] The cover member 32 has a hole A in the opening B at a position corresponding to the position through which the operating lever 11 passes in the standby state. Furthermore, the cover member 32 has a slit S along the direction of movement of the operating lever 11. The slit S may be simply a cut without any gap.

[0057] The cover member 32 is formed of a flexible material such as rubber, so it bends as the operating lever 11 moves, thus not hindering the movement of the operating lever 11. In addition, in this embodiment, since the cover member 32 has a slit S, the resistance experienced by the operating lever 11 from the cover member 32 is reduced, thereby reliably preventing the movement of the operating lever 11 from being obstructed.

[0058] Figure 5 This is a top view of the electric actuator 10, showing the positional relationship between the flexible cover member 32 and the plate-like member 33 fixed to the operating lever 11 in this embodiment. Figure 5 In the diagram, plate-shaped member 33 is represented by a dashed line. Figure 5 In the middle, the electric actuator is in standby mode.

[0059] The planar portion of the plate-shaped member 33 is located at the opening B. Figure 4 Directly below. Furthermore, the flat portion of the plate-shaped member 33 extends from the opening B ( Figure 4 The area directly below the covering member 32 or the opening B is perpendicular to the area below the covering member 32. Figure 4 The plate-shaped member 33 extends along the long side of the feed screw or the long side of the armature 34 to which the operating lever 11 is connected. Therefore, the plate-shaped member 33 covers the armature 34 to which the operating lever 11 is connected and a portion of the feed screw 36 adjacent to the armature 34. This reliably prevents dust and foreign matter from adhering to or contacting these parts.

[0060] In addition, such as Figure 5 As shown, the slit S of the covering member 32 (refer to) Figure 4 The long side direction of ) along Figure 5 The feed screw is shown in the axial direction. Therefore, the cover member 32 does not hinder the movement of the operating lever 11 when transitioning from the standby state to the braking state, nor does it hinder the movement of the operating lever 11 when returning to the standby state.

[0061] As described above, according to this embodiment, dust or foreign matter can be prevented from adhering to or contacting the mechanism of the electric actuator. Therefore, the reliability of the electric actuator's operation in the installation environment can be improved. Consequently, the reliability of the emergency stop device's operation and the emergency stop operation of the elevator system is improved.

[0062] Furthermore, the present invention is not limited to the embodiments described above, and includes various modifications. For example, the above-described embodiments are detailed descriptions provided for ease of understanding of the present invention, and the present invention is not necessarily limited to including all the structures described. Moreover, for a portion of the structure of the embodiments, other structures can be added, deleted, or replaced.

[0063] For example, in addition to the upper part of the car 1, the electric operator 10 can also be located in the lower part or side part of the car 1. The electric operator may also include a linear actuator.

[0064] Label Explanation

[0065] 1…Car, 2…Emergency stop device, 3…Position sensor, 4…Guide rail, 10…Electric operator, 11…Operating lever, 12…Drive shaft, 13…Drive spring, 14…Fixing part, 15…Pressing member, 16…Actuating component, 17…Connecting part, 18…Actuating component, 19…Actuating shaft, 20…Actuating shaft, 21…Upper rod, 30…Housing, 31…Housing cover, 32…Covering member, 33…Plate member, 34…Armature, 35…Electromagnet, 36…Feed screw, 37…Motor, 38…Bracket, 40…Base plate, 41…Supporting member, 42…Supporting member, 50…Upper beam.

Claims

1. An elevator device, comprising: The car; An emergency stop device is installed in the car; as well as An electric actuator installed in the car to activate the emergency stop device. The elevator device is characterized in that... The electric actuator includes: case; The mechanism located inside the housing; and An operating lever connected to the mechanism extends from the inside of the housing through an opening in the housing to the outside of the housing. The housing has a covering member that covers the opening. The operating lever is inserted through the covering component. The covering member has a slit extending along the direction of movement of the operating lever.

2. The elevator device as described in claim 1, characterized in that, The electric actuator includes a plate-shaped member disposed within the housing and on the operating lever.

3. The elevator device as described in claim 2, characterized in that, The plate-shaped member is located above the mechanism section.

4. The elevator device as described in claim 3, characterized in that, The plate-shaped member is located directly below the covering member.

5. The elevator device as described in claim 4, characterized in that, The planar portion of the plate-shaped member covers the area directly below the covering member and is wider than the covering member.

6. The elevator device as claimed in claim 1, characterized in that, The mechanism of the electric actuator includes: The armature connected to the operating lever; An electromagnet that attracts the armature in the standby state of the electric actuator; A feed screw that is threadedly engaged with the nut portion of the electromagnet; and An electric motor that drives the feed screw.

7. The elevator device as described in claim 6, characterized in that, The cover member is located directly above the feed screw.

8. The elevator device as described in claim 2, characterized in that, The mechanism of the electric actuator includes: The armature connected to the operating lever; An electromagnet that attracts the armature in the standby state of the electric actuator; A feed screw that is threadedly engaged with the nut portion of the electromagnet; and The electric motor that drives the feed screw. The plate-shaped member is disposed on the connection between the operating lever and the armature on the operating lever.

9. The elevator device as described in claim 8, characterized in that, The planar portion of the plate-like member covers the armature.

10. The elevator device as claimed in claim 1, characterized in that, The covering member is flexible.

11. The elevator device as claimed in claim 1, characterized in that, The slit is merely a cut and has no gap.

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