Emergency stop device, elevator, and recovery method for emergency stop device

Abstract

The emergency stop device has a braking mechanism, a pulling member, a driving mechanism and a working mechanism. The pulling member is connected with the braking piece of the braking mechanism. The driving mechanism has a connecting part connected with the pulling member, and makes the braking mechanism act. The working mechanism is connected with the driving mechanism, and makes the driving mechanism work. Moreover, the connecting part only transmits force to the upper part of the lifting direction relative to the pulling member.

Description

Technical Field

[0001] This invention relates to an emergency stop device for stopping an elevator car in an emergency, an elevator equipped with the emergency stop device, and a method for restoring the emergency stop device. Background Technology

[0002] Typically, cable-type elevators have long components such as a main sling and compensating sling connecting the elevator car to the counterweight, and a speed controller sling used to detect the speed of the elevator car or counterweight. Additionally, as a safety device, elevators are equipped with an emergency stop system that automatically stops the elevator car when its speed along the guide rails exceeds a predetermined value.

[0003] In recent years, emergency stop devices have been proposed that electrically operate the braking mechanism of the emergency stop device without using a speed governor. As a conventional example of such an emergency stop device, there is the technology described in Patent Document 1. Patent Document 1 describes an emergency stop device comprising a braking mechanism, a drive mechanism, and a working mechanism. The drive mechanism comprises a lifting member, a connecting rod member, a drive shaft, and a drive spring. The drive spring is disposed on the drive shaft and applies force to the drive shaft in the direction of lifting the braking member. The working mechanism comprises a connecting member, a movable iron core, an electromagnet core, and a holding and restoring mechanism. The connecting member is connected to the other end of the connecting rod member. The movable iron core is fixed to the connecting member. The electromagnet core attracts and separates the movable iron core. The holding and restoring mechanism moves the electromagnet core in the direction of approaching and separating relative to the movable iron core.

[0004] Prior art literature

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2020-83579 Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] However, in the technology described in Patent Document 1, during the recovery operation, the drive unit provided in the working mechanism is activated to press the lifting member to overcome the force of the drive spring and release the clamping of the guide rail by the brake member of the braking mechanism. As a result, in the technology described in Patent Document 1, the drive unit of the working mechanism needs to overcome not only the force of the drive spring but also the force to release the clamping of the brake member, making the drive unit of the working mechanism larger.

[0009] Furthermore, in the technology described in Patent Document 1, during the recovery operation, in order to release the clamping of the brake, the drive unit of the working mechanism needs to be driven, and the elevator car needs to be moved upwards. Thus, the technology described in Patent Document 1 also has the problem that the control of various devices during the recovery operation becomes complicated.

[0010] In view of the above problems, the object of the present invention is to provide an emergency stop device, an elevator, and a method for restoring the emergency stop device that enables miniaturization of the drive unit of the working mechanism and facilitates the recovery operation.

[0011] Solution for solving the problem

[0012] To address the aforementioned issues and achieve the objective, the emergency stop device includes a braking mechanism, a lifting member, a drive mechanism, and a working mechanism. The braking mechanism has a brake member disposed on the lifting body and clamping a guide rail for sliding of the lifting body; the braking mechanism stops the movement of the lifting body. The lifting member is connected to the brake member. The drive mechanism has a connecting portion connected to the lifting member and actuates the braking mechanism. The working mechanism is connected to the drive mechanism and operates the drive mechanism. Furthermore, the connecting portion transmits only upward force in the lifting direction relative to the lifting member.

[0013] In addition, elevators have a lifting body that moves up and down within the lifting channel, wherein...

[0014] The elevator includes: guide rails, which are vertically installed within the elevator shaft to support the elevator body and allow it to slide; and an emergency stop device that stops the movement of the elevator body based on its vertical movement. Furthermore, the aforementioned emergency stop device is used as the emergency stop device.

[0015] In addition, in the method for restoring the emergency stop device, the emergency stop device has the structure described above and includes the steps shown in (1) to (2) below.

[0016] (1) The process of performing the restoring action of the working mechanism to release the load from the drive mechanism above the brake in the lifting direction.

[0017] (2) When the working mechanism completes its recovery action, the lifting body is raised and rotated, and the clamping of the guide rail by the braking component is released.

[0018] Invention Effects

[0019] Based on the above-described emergency stop device, elevator, and emergency stop device recovery method, it is possible to miniaturize the drive unit of the working mechanism and easily perform recovery operations. Attached Figure Description

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

[0021] Figure 2 This is a front view showing an example of an emergency stop device.

[0022] Figure 3 This is a diagram showing the braking mechanism of an emergency stop device according to an embodiment example. A is a front view and B is a sectional view.

[0023] Figure 4 This is a front view showing the working mechanism of the emergency stop device according to an embodiment example.

[0024] Figure 5 This is a front view showing the working state of the working mechanism of the emergency stop device in the embodiment example.

[0025] Figure 6 This is an explanatory diagram showing the recovery operation of the emergency stop device according to an embodiment example.

[0026] Figure 7 This is a flowchart illustrating the recovery operation of the emergency stop device in an embodiment example. Detailed Implementation

[0027] The following is for reference Figures 1 to 7 The emergency stop device, elevator, and emergency stop device restoration method of the embodiments will be described. It should be noted that common components are labeled with the same reference numerals in all figures.

[0028] 1. Implementation Examples

[0029] 1-1. Structural Example of an Elevator

[0030] First, refer to Figure 1 The structure of the elevator in the embodiment example (hereinafter referred to as "this example") will be described.

[0031] Figure 1 This is a schematic diagram illustrating the structure of the elevator in this example.

[0032] like Figure 1 As shown, the elevator 1 in this example moves up and down within a lift channel 110 formed within a building structure. The elevator 1 includes an elevator car 120, representing a lifting body for carrying people or goods, a main hoist 130, and a counterweight 140, representing another lifting body.

[0033] In addition, elevator 1 is equipped with a winch 100 and an emergency stop device 5.

[0034] In addition, elevator 1 includes a control unit 170 and a steering pulley 150. It should be noted that the hoisting channel 110 is formed within the building structure, and a machine room 160 is provided at its top.

[0035] A winch 100 and a guide pulley 150 are arranged in the machine room 160. A main sling 130 is wound on the rope sheave of the winch 100 as shown in the attached diagram. In addition, a guide pulley 150 for supporting the main sling 130 is provided near the winch 100.

[0036] The upper part of the elevator car 120 is connected to one end of the main hoisting cable 130, and the upper part of the counterweight 140 is connected to the other end of the main hoisting cable 130. Driven by the winch 100, the elevator car 120 and the counterweight 140 move up and down in the lifting channel 110. Hereinafter, the direction of the elevator car 120 and the counterweight 140 moving up and down will be defined as the lifting direction Z.

[0037] The elevator car 120 is slidably supported on two guide rails 201A and 201B via a guide device (not shown). Similarly, the counterweight 140 is slidably supported on the counterweight-side guide rail 201C via a guide device (not shown). The two guide rails 201A and 201B and the counterweight-side guide rail 201C extend along the lifting direction Z within the lifting channel 110.

[0038] In addition, an emergency stop device 5 is provided in the elevator car 120 to bring the elevator car 120 to an emergency stop. The detailed structure of the emergency stop device 5 will be described later.

[0039] Furthermore, a control unit 170 is installed in the machine room 160. The control unit 170 is connected to the elevator car 120 via a connection wiring not shown. The control unit 170 also outputs control signals to the elevator car 120. Additionally, the control unit 170 is located within the elevator shaft 110 and is connected to a status detection sensor (not shown) that detects the status of the elevator car 120.

[0040] The information detected by the state detection sensors includes the position information, speed information, and acceleration information of the elevator car 120 moving vertically within the lifting channel 110. For example, in a multi-car elevator where multiple elevator cars 120 move vertically within the same lifting channel 110, the position information of the car 120 includes abnormal proximity information detected when the distance between two adjacent elevator cars 120 is closer than a predetermined distance.

[0041] Additionally, the system detects speed information for the elevator car 120, for example, abnormal descent speed information detected when the descent speed of the elevator car 120 exceeds the rated speed and reaches a predetermined speed. Furthermore, it detects acceleration information for the elevator car 120, for example, abnormal acceleration information detected when the acceleration of the elevator car 120 deviates from a preset pattern. The status detection sensor outputs the detected information to the control unit 170.

[0042] The control unit 170 determines whether the elevator car 120 is in an abnormal or normal state based on information detected by the state detection sensor. If the elevator car 120 is determined to be in an abnormal state, the control unit 170 outputs an action command signal to the emergency stop device 5. The emergency stop device 5 then operates based on the action command signal from the control unit 170, stopping the elevator car 120.

[0043] It should be noted that this example illustrates the detection of position, velocity, and acceleration information by a state detection sensor, but it is not limited to this. For example, position, velocity, and acceleration information can be detected using different sensors. Furthermore, the control unit 170 can select and acquire position, velocity, and acceleration information individually, or it can acquire multiple pieces of information in combination.

[0044] It should be noted that the control unit 170 and the elevator car 120 are not limited to a wired connection; they can also be connected wirelessly in a way that enables the transmission and reception of signals.

[0045] Hereinafter, the direction in which the elevator car 120 moves up and down is defined as the lifting direction Z, and the lifting direction Z is defined as orthogonal. The direction in which the elevator car 120 is opposite to the guide rail 201A is defined as the first direction X. Furthermore, the direction orthogonal to the first direction X and also orthogonal to the lifting direction Z is defined as the second direction Y.

[0046] 1-2. Structure of the emergency stop device

[0047] Next, refer to Figures 2-6 The detailed structure of the emergency stop device 5 is explained.

[0048] Figure 2 This is a front view showing the emergency stop device 5.

[0049] like Figure 2 As shown, the emergency stop device 5 has two braking mechanisms 10A and 10B, a working mechanism 11, a drive mechanism 12 for actuating the braking mechanisms 10A and 10B, a first lifting member 13, and a second lifting member 14. The working mechanism 11 is disposed in a crosshead 121 provided in the upper part of the elevator car 120.

[0050] [Drive mechanism]

[0051] The drive mechanism 12 includes a drive shaft 15, a first connecting rod member 16, a second connecting rod member 17, a first working shaft 18, a second working shaft 19, and a drive spring 20.

[0052] A first working shaft 18 and a second working shaft 19 are disposed in a crosshead 121 disposed on the upper part of the elevator car 120. The first working shaft 18 is disposed at one end of the crosshead 121 in a first direction X, and the second working shaft 19 is disposed at the other end of the crosshead 121 in the first direction X. A first connecting rod member 16 is rotatably supported on the first working shaft 18, and a second connecting rod member 17 is rotatably supported on the second working shaft 19.

[0053] The first link member 16 and the second link member 17 are formed in a generally T-shape. The first link member 16 has a working piece 16a and a connecting piece 16b. The working piece 16a protrudes approximately perpendicularly from the connecting piece 16b. Furthermore, the working piece 16a is connected to a position near one end of the connecting piece 16b in the longitudinal direction, beyond the middle portion. The working piece 16a protrudes towards the guide rail 201A, which is located on the negative side of the elevator car 120 in the first direction X (referred to as the left side in the figure. Hereinafter, the left and lower sides of the paper plane on the XYZ axis in the figure are designated as the negative side, and the right and upper sides of the paper plane on the XYZ axis are designated as the positive side.). A first lifting member 13 is connected to the end of the working piece 16a on the side opposite to the connecting piece 16b via a connecting portion 26. It should be noted that the detailed structure of the connecting portion 26 will be described later.

[0054] The first link member 16 is rotatably supported on the first working shaft 18 at the connection point between the working plate 16a and the connecting plate 16b. A drive shaft 15 is connected to one end of the connecting plate 16b in the longitudinal direction via a connecting portion 25. Furthermore, a connecting member 41 (see reference 16b) of the working mechanism 11, described later, is connected to the end of the connecting plate 16b opposite to the end connected to the drive shaft 15, i.e., the other end in the longitudinal direction. Figure 4 ).

[0055] The first link member 16 is configured such that one end of the connecting piece 16b in the longitudinal direction faces upward in the descending direction Z, and the other end of the connecting piece 16b in the longitudinal direction faces downward in the lifting direction Z.

[0056] The second linkage member 17 has a working piece 17a and a connecting piece 17b. The working piece 17a protrudes substantially perpendicularly from the connecting piece 17b. Furthermore, the working piece 17a is connected to the middle portion of the connecting piece 17b in the longitudinal direction. The working piece 17a also protrudes toward the guide rail 201B disposed on the positive side of the elevator car 120 in the first direction X. A second lifting member 14 is connected to the end of the working piece 17a on the side opposite to the connecting piece 17b via a connecting portion 28.

[0057] The other end of the connecting piece 17b in the longitudinal direction is connected to the drive shaft 15 via the connecting portion 27. Furthermore, the second link member 17 is rotatably supported on the second working shaft 19 at the connection point between the working piece 17a and the connecting piece 17b. Additionally, the second link member 17 is configured such that one end of the connecting piece 17b in the longitudinal direction faces upward in the lifting direction Z, and the other end of the connecting piece 17b in the longitudinal direction faces downward in the lifting direction Z.

[0058] One end of the drive shaft 15 in the first direction X is connected to the connecting piece 16b of the first connecting rod member 16, and the other end of the drive shaft 15 in the first direction X is connected to the connecting piece 17b of the second connecting rod member 17. In addition, a drive spring 20 is provided in the middle part of the drive shaft 15 in the axial direction.

[0059] The drive spring 20 is, for example, a compression coil spring. One end of the drive spring 20 is fixed to the crosshead 121 via the fixing part 21, and the other end of the drive spring 20 is fixed to the drive shaft 15 via the pressing member 22. Furthermore, the drive spring 20 applies force to the drive shaft 15 toward the positive side in the first direction X via the pressing member 22.

[0060] When the working mechanism 11 is activated, the drive shaft 15 is moved towards the positive side in the first direction X by the force applied by the drive spring 20. As a result, the first linkage member 16 rotates around the first working shaft 18 with the end of the working piece 16a connected to the first lifting member 13 facing upwards in the lifting direction Z. Meanwhile, the second linkage member 17 rotates around the second working shaft 19 with the end of the working piece 17a connected to the second lifting member 14 facing upwards in the lifting direction Z. Consequently, the first lifting member 13 and the second lifting member 14 are linked and lifted upwards in the lifting direction Z.

[0061] Furthermore, a first braking mechanism 10A is connected to the end of the first lifting member 13 opposite to the end connected to the working piece 16a. A second braking mechanism 10B is connected to the end of the second lifting member 14 opposite to the end connected to the working piece 17a. The first lifting member 13 also connects a pair of braking elements 31, 31 of the first braking mechanism 10A (see reference 10A). Figure 3 The second lifting member 14 pulls the pair of brake members 31, 31 of the second braking mechanism 10B (described later) upward in the lifting direction Z.

[0062] The first braking mechanism 10A and the second braking mechanism 10B are disposed at the lower end of the elevator car 120 in the lifting direction Z. The first braking mechanism 10A is disposed opposite to the guide rail 201A at one end of the elevator car 120 in the first direction X. In addition, the second braking mechanism 10B is disposed opposite to the guide rail 201B at the other end of the elevator car 120 in the first direction X.

[0063] Next, refer to Figure 3 A and Figure 3 B describes the detailed structure of the first braking mechanism 10A, the second braking mechanism 10B, and the connecting parts 26 and 28.

[0064] Figure 3 A and Figure 3 Figure B shows the braking mechanisms 10A and 10B and the connecting parts 26 and 28.

[0065] The first braking mechanism 10A and the second braking mechanism 10B have the same structure, therefore, the first braking mechanism 10A will be described here. The first braking mechanism 10A will be simply referred to as braking mechanism 10.

[0066] like Figure 3 As shown in Figure A, the connecting portion 26 is cylindrical. Furthermore, the upper end of the first lifting member 13 in the lifting direction Z passes through the cylindrical hole of the connecting portion 26 in a manner capable of moving along the lifting direction Z. Additionally, a shaft portion 26a is formed in the connecting portion 26 to rotatably support the working piece 16a. It should be noted that a stop member 26b is provided at the upper end of the first lifting member 13. The stop member 26b is positioned in the first lifting member 13 at a position closer to the upper end of the connecting portion 26 in the lifting direction Z than the connecting portion 26. By abutting against the connecting portion 26, the first lifting member 13 is prevented from disengaging from the connecting portion 26.

[0067] It should be noted that in this example, the connecting part 26 is described as being formed in a cylindrical shape, but it is not limited to this. As the connecting part 26, it can be formed in various shapes other than cylindrical, as long as it has a hole through which the first lifting member 13 can pass in a movable manner.

[0068] When the first link member 16 rotates and the connecting piece 16b rotates upward in the lifting direction Z, the connecting portion 26 abuts against the stop member 26b. Furthermore, the connecting portion 26 transmits the rotational torque of the first link member 16 to the first lifting member 13 via the stop member 26b. Thus, the first lifting member 13 and the connecting portion 26 are lifted together upward in the lifting direction Z.

[0069] Furthermore, when the first connecting rod member 16 rotates and the connecting piece 16b rotates downwards in the lifting direction Z, the connecting portion 26 moves downwards in the lifting direction Z together with the connecting piece 16b. It should be noted that no stop is provided in the first lifting member 13 at a position lower in the lifting direction Z than the connecting portion 26. Therefore, the load when the connecting portion 26 moves downwards in the lifting direction Z is not transmitted to the first lifting member 13. That is, the connecting portion 26 only transmits the upward force in the lifting direction Z from the driving force from the drive mechanism 12 to the first lifting member 13. As a result, only the connecting portion 26 moves downwards in the lifting direction Z along the first lifting member 13.

[0070] It should be noted that the connecting part 28 has the same structure as the connecting part 26, so its description is omitted.

[0071] like Figure 3 A and Figure 3 As shown in Figure B, the braking mechanism 10 includes a frame 30, a pair of braking elements 31, a pair of guide members 32, a connecting member 33, and a force-applying member 34. The pair of braking elements 31 are arranged opposite each other, sandwiching the guide rail 201A in the middle. Furthermore, in the state before the emergency stop device 5 is activated, a predetermined interval is formed between the pair of braking elements 31 and the guide rail 201A.

[0072] The side of the brake member 31 opposite to the guide rail 201A is formed parallel to one side of the guide rail 201A, that is, parallel to the lifting direction Z. Furthermore, the other side of the brake member 31 opposite to the side opposite to the guide rail 201A is inclined in a manner that it approaches the guide rail 201A from below in the lifting direction Z towards the top. Therefore, the brake member 31 is formed in a wedge shape.

[0073] A pair of brake members 31, 31 are mounted to the lower end of the connecting member 33 in the lifting direction Z via support bolts 36. The support bolts 36 pass through a through hole 33a at the lower end of the connecting member 33. Furthermore, the pair of brake members 31, 31 are supported by the connecting member 33 via the support bolts 36 so that they can move in the direction of approaching and separating from the guide rail 201A.

[0074] like Figure 3 As shown in Figure B, the first lifting member 13 is connected to the connecting member 33. Furthermore, the first lifting member 13 is lifted upwards in the lifting direction Z, thereby causing the pair of braking members 31, 31 and the connecting member 33 to move upwards in the lifting direction Z. It should be noted that the pair of braking members 31, 31 are configured to be able to move the length of the support bolt 36 relative to the connecting member 33 in the lifting direction Z.

[0075] Additionally, a pair of braking elements 31, 31 are supported by a pair of guide members 32, 32, enabling them to move. The pair of guide members 32, 32 are fixed to the elevator car 120 via a frame 30 (see reference). Figure 2 Additionally, a pair of guide members 32, 32 are positioned opposite each other at a predetermined interval, such that the guide rail 201A and a pair of brake members 31, 31 are sandwiched in the middle.

[0076] The side of the guide member 32 opposite to the brake member 31 is inclined toward the guide rail 201A as it moves upward toward the lifting direction Z. Therefore, the spacing between the sides of the pair of guide members 32, 32 opposite to the brake member 31 narrows as it moves upward toward the lifting direction Z.

[0077] Furthermore, a force-applying member 34 is disposed on the opposite side of the guide member 32, opposite to the side facing the brake member 31. The force-applying member 34 is, for example, a leaf spring with a U-shaped cross-section cut in a horizontal direction orthogonal to the lifting direction Z. The two ends of the force-applying member 34 are positioned opposite each other at a predetermined interval, clamping the guide rail 201A in the middle. And, the guide member 32 is fixed to the opposing sides at both ends of the force-applying member 34.

[0078] It should be noted that the force-applying member 34 is not limited to a U-shaped leaf spring. For example, a compression coil spring can also be used, which is clamped between the guide member 32 and the frame (not shown).

[0079] If the pair of brake members 31, 31 move upward relative to the guide member 32 in the lifting direction Z, the pair of brake members 31, 31 move in a direction that approaches each other via the guide member 32, that is, towards the guide rail 201A. Furthermore, if the pair of brake members 31 move upward in the lifting direction Z, the pair of brake members 31 are pushed against the guide rail 201A by the force exerted by the force-applying member 34 via the guide member 32. Thus, the lifting movement of the elevator car 120 is braked.

[0080] [Work Unit]

[0081] Next, refer to Figure 4 The working mechanism 11 is explained.

[0082] Figure 4 This is a front view showing the working mechanism 11. It should be noted that... Figure 4 The standby state of the working mechanism 11 is shown.

[0083] like Figure 4 As shown, the working mechanism 11 includes a connecting member 41, an electromagnet core 43, a movable iron core 44, a base plate 45, a feed screw shaft 47, a feed nut 48, and a drive motor (not shown). Furthermore, the working mechanism 11 enables the drive mechanism 12 to operate.

[0084] The base plate 45 is formed of a flat plate. The base plate 45 is fixed to the crosshead 121. It should be noted that the location for fixing the base plate 45 is not limited to the crosshead 121; it is not particularly limited as long as it is the elevator car 120 that serves as the lifting body. A first shaft support portion 54 and a second shaft support portion 55 are fixed to the upper surface portion above the lifting direction Z in the base plate 45.

[0085] A first shaft support 54 is disposed at one end of a base plate 45, and a second shaft support 55 is disposed at the other end of a base plate 45. The first shaft support 54 and the second shaft support 55 are arranged opposite to each other. A feed screw shaft 47 is rotatably supported on the first shaft support 54 and the second shaft support 55. Furthermore, the feed screw shaft 47 is arranged between the first shaft support 54 and the second shaft support 55, with its axial direction parallel to the first direction X. In addition, a drive motor (not shown) is disposed on one of the first shaft support 54 and the second shaft support 55. The rotating shaft of the drive motor is mounted to the feed screw shaft 47 via a coupling.

[0086] A trapezoidal thread is formed on the outer circumferential surface of the feed screw shaft 47. Furthermore, the feed nut 48 is screwed onto the feed screw shaft 47. An electromagnet core 43 is fixed to the feed nut 48.

[0087] A coil is provided on the electromagnet core 43. Power is supplied to the coil from a power source not shown. When the coil is energized, an electromagnet is formed by the electromagnet core 43 and the coil. The end of the electromagnet core 43 opposite to the end fixed to the feed nut 48 faces the negative side of the first direction X. Furthermore, the electromagnet core 43 is opposite to the movable iron core 44 mounted on the connecting member 41 described later.

[0088] The drive motor is controlled and driven by the control unit 170. When the drive motor rotates, the feed screw shaft rotates. Furthermore, by rotating the feed screw shaft 47, the rotational force of the feed screw shaft 47 is converted into a force along the first direction X by the threaded portion and threaded hole. The feed nut 48 then moves along the first direction X. Additionally, the electromagnet core 43, to which the feed nut 48 is fixed, also moves along the first direction X.

[0089] If the drive motor rotates in the forward direction (forward rotation), the feed nut 48 moves towards one end in the first direction X, i.e., the first shaft support 54. Conversely, if the drive motor rotates in the reverse direction (reverse rotation), the feed nut 48 moves towards the other end in the first direction X, i.e., the second shaft support 55. Here, the second shaft support 55 is positioned in the standby position of the feed nut 48 and the electromagnet core 43. Furthermore, in the standby state of the working mechanism 11, and when returning from the braking state to the recovery state, the electromagnet core 43 abuts against the second shaft support 55 via the feed nut 48.

[0090] The connecting member 41 is rotatably connected to the connecting piece 16b of the first connecting rod member 16 via a connecting pin 41a. Additionally, a movable iron core 44 is fixed to the connecting member 41. The movable iron core 44 is supported on the connecting member 41 and faces the electromagnet core 43 fixed to the feed nut 48. Figure 4 In the standby state shown, the movable iron core 44 is attracted to the electromagnet core 43.

[0091] In addition, a moving mechanism is formed by driving a motor, a feed screw shaft 47 and a feed nut 48 to move the electromagnet core 43 in a direction (in this example, the first direction X) relative to the movable iron core 44, which is close to and separate from it.

[0092] Furthermore, the connecting member 41, electromagnet core 43, movable iron core 44, base plate 45, drive motor, feed screw shaft 47, and feed nut 48 constituting the working mechanism 11 described above are housed in a frame (not shown). In this way, by housing the connecting member 41, the electromagnet core 43 constituting the holding part, the feed screw shaft 47 constituting the moving mechanism, and the drive motor in one frame, the large size of the emergency stop device 5 can be prevented. Additionally, by concentrating the functions of the working mechanism 11 in one location, maintenance operations can be easily performed.

[0093] Furthermore, as described above, the drive spring 20 is positioned at a different location from the working mechanism 11, and is connected to the working mechanism 11 via the first link member 16, which serves as a linkage mechanism. This allows for the miniaturization of the working mechanism 11.

[0094] 2. Example of emergency stop device operation

[0095] Next, an example of the operation of the emergency stop device 5 having the above structure will be explained.

[0096] [Standby mode]

[0097] First, refer to Figure 4 The standby state of emergency stop device 5 is explained.

[0098] like Figure 4 As shown, in the standby state of the emergency stop device 5, the electromagnet core 43 is positioned at the other end of the feed screw shaft 47 in the first direction X. Furthermore, the coil of the electromagnet core 43 is energized, and the electromagnet core 43 is excited. Thus, the electromagnet core 43 and the coil constitute an electromagnet.

[0099] The movable iron core 44 is attracted to the electromagnet core 43. Therefore, one end of the connecting piece 16b of the first connecting rod member 16 is held toward the positive side of the first direction X via the connecting member 41 to which the movable iron core 44 is fixed. As a result, the drive shaft 15, which is connected to the other end of the connecting piece 16b, overcomes the force of the drive spring 20 and applies force toward the negative side of the first direction X.

[0100] At this time, the feed nut 48 abuts against the second shaft support 55. As described above, the second shaft support 55 is positioned in the standby position of the movable member. Therefore, the position where the feed nut 48 abuts against the second shaft support 55 is set as the standby state of the emergency stop device 5. Furthermore, the distance between the brake member 31 of the braking mechanisms 10A and 10B connected to the movable core 44 and the guide rails 201A and 201B is adjusted to the desired distance.

[0101] Therefore, the positioning of the electromagnet core 43, the movable core 44, and the feed nut 48, which are movable components, can be easily achieved. Furthermore, by the feed nut 48 abutting against the second shaft support 55, the movement of the movable component towards the other end side, i.e., the positive side, in the first direction X is restricted. This prevents the brake member 31 from shifting away from the guide rails 201A and 201B.

[0102] Furthermore, the position of the feed nut 48 can be limited without using a switch to detect the position of the feed nut 48, thus enabling a reduction in the number of components in the emergency stop device 5 and eliminating the need to adjust the position of the switch.

[0103] It should be noted that the example given is of detecting the position of the feed nut 48 without setting a switch, but a switch for detecting the position of the feed nut 48 and the electromagnet core 43 can also be set.

[0104] [Transition to braking state]

[0105] Next, refer to Figure 5 The action of transitioning from standby state to braking state is explained.

[0106] Figure 5 This is the main view showing the working status of the working mechanism 11.

[0107] In elevator car 120 (reference) Figure 1 and Figure 2 During descent, if the control unit 170 determines that the descent speed of the elevator car 120 exceeds the specified speed, the control unit 170 outputs an action command signal to the emergency stop device 5. This cuts off the power supply to the electromagnet core 43. It should be noted that the cut-off of power to the electromagnet core 43 occurs not only when the speed of the elevator car 120 exceeds the specified speed, but also when the elevator 1 experiences a power outage.

[0108] The current supply to the electromagnet core 43 is cut off, thereby eliminating the magnetism of the electromagnet core 43. Thus, as... Figure 5 As shown, the drive shaft 15 moves in the positive direction X under the force of the drive spring 20, and one end of the first link member 16 also moves in the positive direction X together with the drive shaft 15. As a result, the first link member 16 rotates about the first working shaft 18, and the second link member 17 rotates about the second working shaft 19. In this way, the drive mechanism 12 works through the working mechanism 11.

[0109] In addition, such as Figure 5 As shown, the first connecting rod member 16 rotates, thereby separating the movable iron core 44 from the electromagnet core 43. Accompanying the rotation of the first connecting rod member 16, the connecting member 41 moves to the negative side of the first direction X.

[0110] If the first linkage member 16 rotates and the working piece 16a moves upward in the lifting direction Z, the connecting part 26 moves upward in the lifting direction Z together with the working piece 16a. Furthermore, the connecting part 26 abuts against the stop member 26b, and the stop member 26b is pressed upward in the lifting direction Z by the connecting part 26. As a result, the first lifting member 13 is lifted upward in the lifting direction Z. It should be noted that the operation of the second linkage member 17, the second lifting member 14, and the connecting part 28 is the same as the operation of the first linkage member 16, the first lifting member 13, and the connecting part 26, therefore their description is omitted.

[0111] The first lifting member 13 and the second lifting member 14 are lifted upwards in the lifting direction Z, thereby activating the first braking mechanism 10A connected to the first lifting member 13 and the second braking mechanism 10B connected to the second lifting member 14 (see reference). Figure 2 The first braking mechanism 10A and the second braking mechanism 10B operate. As a result, a pair of braking elements 31 (refer to...) of the first braking mechanism 10A and the second braking mechanism 10B... Figure 3 The elevator car 120 moves upward in the lifting direction Z. A pair of brake members 31 of the first braking mechanism 10A connected to the first lifting member 13 and the second braking mechanism 10B connected to the second lifting member 14 clamp the guide rails 201A and 201B, thereby mechanically stopping the lifting movement of the elevator car 120.

[0112] In addition, the movable iron core 44 is separated from the electromagnet core 43, so it is not affected by the friction and holding force of the feed screw shaft 47 and the feed nut 48, which are the moving mechanism, and the connecting member 41 can be moved.

[0113] [Recovery Action]

[0114] Next, refer to Figure 6 and Figure 7The recovery action of the emergency stop device 5 from the braking state to the standby state is explained.

[0115] Figure 6 This is an explanatory diagram showing the recovery action of the working mechanism 11 and the braking mechanism 10. Figure 7 This is a flowchart illustrating the recovery process.

[0116] like Figure 7 As shown, in standby mode, if the power supply to the coil of the electromagnet core 43 is cut off or lost (step S11), then as described above... Figure 5 As shown, working mechanism 11 is in operation.

[0117] Furthermore, the control unit 170 determines whether the elevator car 120 has stopped due to the braking mechanisms 10A and 10B (step S12). Here, in the processing of step S12, not only is the stopping state of the elevator car 120 determined, but the state of the emergency stop device 5 can also be determined comprehensively based on information such as whether the working mechanism 11 is activated.

[0118] In the process of step S12, if the control unit 170 determines that the elevator car 120 has stopped (the determination in step S12 is yes), it performs the recovery operation of the working mechanism 11, which is described later (step S13).

[0119] In the recovery operation shown in step S13, firstly, the control unit 170 controls the power supply to energize the coil of the electromagnet core 43. This energizes the coil, thereby exciting the electromagnet core 43. Next, the control unit 170 drives the drive motor by rotation, causing the feed screw shaft 47 to rotate. The rotation of the feed screw shaft 47 converts its rotational force into a force along the first direction X through the threaded portion and threaded hole of the feed screw shaft 47 and the feed nut 48. The feed nut 48 moves toward the negative side of the first direction X. Furthermore, the electromagnet core 43, fixed to the feed nut 48, also moves toward the direction closer to the movable core 44, i.e., the negative side of the first direction X.

[0120] Next, if the electromagnet core 43 comes into contact with the movable iron core 44, the movable iron core 44 is attracted to the electromagnet core 43. Then, the control unit 170 drives the drive motor by rotation, causing the feed screw shaft 47 to rotate. As a result, the feed nut 48, which is screwed onto the feed screw shaft 47, moves towards the positive side in the first direction X. Therefore, the electromagnet core 43, the movable iron core 44 attracted to the electromagnet core 43, and the connecting member 41 move towards the positive side in the first direction X.

[0121] The connecting member 41 moves towards the positive side in the first direction X, thereby causing the first connecting rod member 16 to rotate against the force of the drive spring 20. Furthermore, when the feed nut 48 abuts against the second shaft support 55, the movement of the feed nut 48 and the electromagnet core 43 towards the positive side in the first direction X is restricted. Therefore, the positioning of the electromagnet core 43, the movable core 44, and the feed nut 48, which are movable members, can be easily achieved.

[0122] Furthermore, the first link member 16 rotates, causing the connecting piece 16b to rotate downwards in the lifting direction Z, and the connecting portion 26 moves downwards in the lifting direction Z together with the connecting piece 16b. As described above, the first lifting member 13 is only transmitted with force upwards in the lifting direction Z. Therefore, only the connecting portion 26 moves downwards in the lifting direction Z along the first lifting member 13. Therefore, the force of the brake member 31 of the braking mechanism 10 clamping the guide rail 201A does not act on the working mechanism 11 and the first link member 16. Thus, the driving force of the drive motor (drive unit) provided in the working mechanism 11 is only the force that overcomes the force of the drive spring 20 of the drive mechanism 12. This enables the miniaturization of the drive motor (drive unit) of the working mechanism 11.

[0123] Furthermore, the connecting portion 26 moves downward in the lifting direction Z, thereby releasing the upward force generated by the drive spring 20 relative to the connecting member 33 of the first lifting member 13 and the braking mechanism 10 in the lifting direction Z. Therefore, the first lifting member 13 and the connecting member 33 descend downward in the lifting direction Z due to their own weight. It should be noted that the support bolt 36 installed on the braking member 31 passes through the through hole 33a provided at the lower end of the connecting member 33, thus preventing the connecting member 33 from falling off.

[0124] Furthermore, the load above the connecting member 33 in the lifting direction Z is released, thereby releasing the load above the brake member 31 from the drive mechanism 12 in the lifting direction Z. As a result, the force of the brake member 31 on the clamping guide rail 201A is also reduced.

[0125] like Figure 6 As shown, when the recovery operation of the working mechanism 11 is completed, the control unit 170 drives the winch 100 to raise (UP) the elevator car 120 (step S14). Consequently, the frame 30 of the braking mechanism 10 also rises along with the elevator car 120, thereby pulling the brake member 31 downwards. This releases the clamping of the guide rail 201A by the brake member 31. Furthermore, by performing the above-described steps, the recovery operation of the emergency stop device 5 is completed.

[0126] It should be noted that in the recovery operation of this example, the elevator car 120 is raised and operated from the completion of the recovery operation of the working mechanism 11, and the operation of the working mechanism 11 and the operation of the elevator car 120 are performed separately. As a result, the recovery operation of the emergency stop device 5 in the elevator 1 can be reliably performed, and the control of the recovery operation can be simplified.

[0127] It should be noted that the invention is not limited to the embodiments described above and shown in the accompanying drawings. Various modifications can be made without departing from the spirit of the invention as described in the technical solution.

[0128] In the above-described embodiments, an example of controlling the working mechanism 11 and the elevator 1 as a whole through the control unit 170 has been described, but it is not limited to this. For example, the working mechanism 11 and the elevator 1 as a whole may be controlled separately through different control units.

[0129] Furthermore, an example using a drive motor 46, a feed screw shaft 47, and a feed nut 48 has been described as a moving mechanism, but it is not limited to this. As a moving mechanism for moving the electromagnet core 43, various other moving mechanisms, such as those using a drive, gear drive, chain drive, or direct-acting solenoid, can be applied.

[0130] The example described is one in which the direction of movement of the electromagnet core of the working mechanism 11 is set to be approximately parallel to the first direction X, but this is not a limitation. The direction of movement of the electromagnet core of the working mechanism 11 can be set to be approximately parallel to the lifting direction Z and the second direction Y, or it can be a direction inclined relative to the first direction X, the second direction Y, and the lifting direction Z. Alternatively, the first link member 16 and the second link member 17 can be arranged at both ends of the elevator car 120 in the second direction Y, and the drive shaft 15 can be arranged along the second direction Y.

[0131] Furthermore, the lifting mechanism is not limited to the elevator car 120; the counterweight 140 can also be used. Additionally, an emergency stop device can be installed on the counterweight 140 to bring its lifting movement to an emergency stop. In this case, the working mechanism, drive mechanism, etc., constituting the emergency stop device are located on the counterweight 140.

[0132] Furthermore, in the above-described embodiment, an example of a control unit 170 that controls the entire elevator 1 was described as the control unit for controlling the emergency stop device, but this is not a limitation. Various other control units can be used, such as a control unit installed in the elevator car 120 that controls only the elevator car 120, or a control unit that controls only the emergency stop device.

[0133] Furthermore, as an elevator, it can also be applied to multi-car elevators where multiple elevator cars move up and down within a single lifting channel.

[0134] It should be noted that the terms "parallel" and "orthogonal" are used in this specification, but they do not only mean strictly "parallel" and "orthogonal". They can also refer to a state of "approximately parallel" or "approximately orthogonal" that includes "parallel" and "orthogonal" and is within the range where it can perform its function.

[0135] Explanation of reference numerals in the attached figures:

[0136] 1…Elevator, 5…Emergency stop device, 10A, 10B…First braking mechanism, 11…Working mechanism, 12…Drive mechanism, 13, 14…Lifting component, 15…Drive shaft, 16…First connecting rod component, 17…Second connecting rod component, 16a, 17a…Working plate, 16b, 17b…Connecting plate, 18…First working shaft, 19…Second working shaft, 20…Drive spring, 26, 28…Connecting part, 26a…Shaft part, 26b…Stop, 41…Connecting… Connecting components, 43…electromagnetic core, 44…movable iron core, 45…base plate, 47…feed screw shaft, 48…feed nut, 54…first shaft support, 55…second shaft support, 100…winch, 110…lifting channel, 120…elevator car (lifting body), 121…crosshead, 130…main sling, 140…counterweight (lifting body), 150…steering pulley, 160…machine room, 170…control unit, 201A, 201B…guide rails.

Claims

1. An emergency stop device, wherein, The emergency stop device includes: A braking mechanism having a brake element disposed on the lifting body and clamping a guide rail for sliding of the lifting body, the braking mechanism stopping the movement of the lifting body; A lifting component, which is connected to the braking component; A drive mechanism having a connecting portion connected to the lifting member and actuating the braking mechanism; and The working mechanism is connected to the drive mechanism and enables the drive mechanism to operate. The connecting part transmits only upward force in the lifting direction relative to the lifting member. The working mechanism is configured to release the load above the drive mechanism in the lifting direction relative to the brake member during the recovery operation. The braking component is configured to release its grip on the guide rail as the lifting body rises and rotates when the restoring action of the working mechanism is completed.

2. The emergency stop device according to claim 1, wherein, The braking mechanism includes a connecting member that supports the braking member so that it can move in the direction of clamping the guide rail. The lifting member is connected to the connecting member.

3. The emergency stop device according to claim 1, wherein, A hole is formed in the connecting part to allow the lifting member to move along the lifting direction.

4. The emergency stop device according to claim 3, wherein, A stop member is provided in the lifting member at a position above the connecting part in the lifting direction, which abuts against the connecting part.

5. The emergency stop device according to claim 4, wherein, The drive mechanism includes: A connecting rod member, rotatably supported on a working shaft disposed on the lifting body and connected to the connecting portion; and A drive spring applies a force upward toward the lifting direction to the end of the connecting rod member that is connected to the connecting portion. The connecting portion has a shaft that supports the end of the connecting rod member so that it can rotate.

6. The emergency stop device according to claim 5, wherein, The working mechanism has the following features: A connecting member, which is connected to the connecting rod member; A movable iron core, which is fixed to the connecting member; An electromagnet core that can be detachably attracted to the movable iron core; as well as A moving mechanism that supports the electromagnet core so that it can move in directions relative to the movable core, allowing it to approach and separate. The moving mechanism has a drive unit that moves the electromagnet core.

7. An elevator comprising a lifting body that moves vertically within a lifting channel, wherein, The elevator has the following features: A guide rail, which is vertically installed within the lifting channel, supports the lifting body so that it can slide; and An emergency stop device that stops the movement of the lifting body based on its lifting and lowering motion. The emergency stop device includes: A braking mechanism having a brake element disposed on the lifting body and clamping a guide rail for sliding of the lifting body, the braking mechanism stopping the movement of the lifting body; A lifting component, which is connected to the braking component; A drive mechanism having a connecting portion connected to the lifting member and actuating the braking mechanism; and The working mechanism is connected to the drive mechanism and enables the drive mechanism to operate. The connecting part transmits only upward force in the lifting direction relative to the lifting member. The working mechanism is configured to release the load above the drive mechanism in the lifting direction relative to the brake member during the recovery operation. The braking component is configured to release its grip on the guide rail as the lifting body rises and rotates when the restoring action of the working mechanism is completed.

8. A method for restoring an emergency stop device, the emergency stop device comprising: a braking mechanism having a brake member disposed on a lifting body and clamping a guide rail for sliding of the lifting body, the braking mechanism stopping the movement of the lifting body; a lifting member connected to the brake member; a drive mechanism having a connecting portion connected to the lifting member and actuating the braking mechanism; and a working mechanism connected to the drive mechanism and actuating the drive mechanism, wherein the connecting portion transmits an upward force only in the lifting direction relative to the lifting member, wherein... The method for restoring the emergency stop device includes the following steps: Perform the recovery action of the working mechanism to release the load above the drive mechanism in the lifting direction relative to the brake; and When the working mechanism completes its recovery action, the lifting body is raised and rotated, thereby releasing the clamping of the guide rail by the braking element.

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