Elevator arrangement

Abstract

In an elevator system, the mechanism for activating the emergency stop device includes a stop, a counterweight, and an actuating spring. The stop is located on the elevator body. The counterweight rests on the stop. The actuating spring applies an upward force to the counterweight. Regarding the actuation mechanism, when the downward acceleration of the elevator body becomes excessive, the counterweight moves away from the stop, and the movement of the counterweight activates the emergency stop device.

Description

Technical Field

[0001] This disclosure relates to elevator devices equipped with emergency stop mechanisms. Background Technology

[0002] Existing emergency stop devices include an emergency stop mechanism, a reaction force generator, and a wedge lifting component. The emergency stop mechanism includes a wedge. The reaction force generator includes a counterweight and an elastic body. The counterweight is supported by the elastic body. Furthermore, the counterweight rises relative to the lifting body in response to the increase in acceleration accompanying the fall of the lifting body. By rising the counterweight, the wedge is lifted via the wedge lifting component (for example, see Patent Document 1).

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2004-345803 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] When using a traction mechanism brake to bring the elevator to an emergency stop, the elevator vibrates while decelerating. In existing emergency stop devices, when the elevator's vibration frequency approaches the natural vibration frequency of the reaction force generator containing a counterweight and an elastic body, the counterweight resonates, amplifying its vertical vibration. This vertical vibration of the counterweight raises concerns about potential malfunction of the emergency stop mechanism during the elevator's deceleration.

[0008] This disclosure was made to solve the aforementioned problems, and its purpose is to provide an elevator device capable of suppressing malfunctions of the emergency stop device.

[0009] Methods for solving problems

[0010] The elevator device disclosed herein includes: a lifting body; a suspension body suspending the lifting body; a traction machine having a drive rope sheave around which the suspension body is suspended, and a traction machine brake for braking the rotation of the drive rope sheave; an emergency stop device disposed on the lifting body; and an actuation mechanism for actuating the emergency stop device, the actuation mechanism having: a stop member disposed on the lifting body; an actuating counterweight mounted on the stop member; and an actuating spring applying an upward force to the actuating counterweight. The actuation mechanism is configured such that when the downward acceleration of the lifting body becomes excessive, the actuating counterweight moves away from the stop member, and the movement of the actuating counterweight actuates the emergency stop device.

[0011] Invention Effects

[0012] The elevator device disclosed herein can suppress malfunctions of the emergency stop device. Attached Figure Description

[0013] Figure 1 This is a schematic structural diagram of the elevator device according to Embodiment 1.

[0014] Figure 2 It is shown Figure 1 A front view of the relationship between the car guide rails and the emergency stop device.

[0015] Figure 3 It is along Figure 2 A cross-sectional view along line III-III.

[0016] Figure 4 It is shown Figure 1 A front view of the state when the emergency stop device is activated.

[0017] Figure 5 It is along Figure 4 A cross-sectional view of the VV line.

[0018] Figure 6 It is shown in magnification Figure 1 The structural diagram of the elevator car.

[0019] Figure 7 It is shown Figure 6 A structural diagram showing the state of a broken suspension body.

[0020] Figure 8 It shows that it has been removed. Figure 6 A graph showing the relationship between the displacement of the counterweight in the vertical direction and time when the stopper is in the case.

[0021] Figure 9 This demonstrates the use of a damper instead of Figure 6 The structural diagram of the car's stop mechanism.

[0022] Figure 10 This demonstrates the use of a damper instead of Figure 6 A graph showing the relationship between the displacement of the counterweight in the vertical direction and time when the stopper is in the case.

[0023] Figure 11 It is shown Figure 6 A graph showing the relationship between the vertical displacement of the counterweight in the motion mechanism and time.

[0024] Figure 12 It is shown Figure 6 A curve diagram showing the method for setting the position of the stop component in the vertical direction of the counterweight.

[0025] Figure 13 This is a structural diagram of the elevator car of the elevator device according to Embodiment 2.

[0026] Figure 14 This is a structural diagram of the elevator car of the elevator device according to Embodiment 3.

[0027] Figure 15 This is a structural diagram of the elevator car of the elevator device according to embodiment 4.

[0028] Figure 16 It is shown Figure 15 A graph showing the relationship between the vertical displacement of the counterweight in the motion mechanism and time.

[0029] Figure 17 This is a structural diagram of the elevator car of the elevator device according to embodiment 5.

[0030] Figure 18 This is a structural diagram of the elevator car of the elevator device according to embodiment 6.

[0031] Figure 19 This is a schematic structural diagram of the elevator device according to embodiment 7. Detailed Implementation

[0032] The embodiments will now be described with reference to the accompanying drawings.

[0033] Implementation method 1.

[0034] Figure 1 This is a schematic structural diagram of the elevator device according to Embodiment 1. In the diagram, a machine room 2 is provided above the hoistway 1. The traction machine 3, the deflector sheave 4, and the control device 5 are provided in the machine room 2.

[0035] The traction machine 3 includes a drive sheave 6, a traction machine motor (not shown), and a traction machine brake 7. The traction machine motor rotates the drive sheave 6. The traction machine brake 7 keeps the drive sheave 6 stationary. Furthermore, the traction machine brake 7 brakes the rotation of the drive sheave 6. An electromagnetic brake is used as the traction machine brake 7.

[0036] A suspension body 8 is wound around the drive sheave 6 and the deflector sheave 4. Multiple ropes or belts are used as the suspension body 8. The car 9, which serves as the lifting body, is connected to the first end of the suspension body 8. The counterweight 10 is connected to the second end of the suspension body 8.

[0037] The car 9 and counterweight 10 are suspended within the hoistway 1 by the suspension body 8. Furthermore, the car 9 and counterweight 10 are raised and lowered by rotating the drive sheave 6. The control device 5 controls the operation of the car 9 by controlling the traction machine 3.

[0038] A pair of car guide rails 11 and a pair of counterweight guide rails 12 are installed in the hoistway 1. The pair of car guide rails 11 guide the raising and lowering of the car 9. The pair of counterweight guide rails 12 guide the raising and lowering of the counterweight 10.

[0039] A car buffer 13 and a counterweight buffer 14 are installed in the pit 1a of the hoistway 1. The pit 1a is part of the hoistway 1 and is located below the lowest floor level.

[0040] An emergency stop device 15 is installed at the bottom of the car 9. The emergency stop device 15 brings the car 9 to an emergency stop by holding a pair of car guide rails 11. A progressive emergency stop device is used as the emergency stop device 15. Typically, progressive emergency stop devices are used in elevators with a rated speed exceeding 45 m / min.

[0041] An actuating lever 16 is provided in the emergency stop device 15. The emergency stop device 15 is activated by pulling the actuating lever 16.

[0042] An actuation mechanism 17 is provided on the upper part of the car 9. The actuation mechanism 17 is connected to the actuation lever 16 via a lifting rod 18. Furthermore, when the downward acceleration of the car 9 becomes excessive, the actuation mechanism 17 activates the emergency stop device 15 via the lifting rod 18 and the actuation lever 16. Excessive acceleration is the acceleration generated when the suspension 8 breaks, causing the car 9 to fall.

[0043] A speed detector 19 is provided in the car 9. The speed detector 19 generates a signal corresponding to the speed of the car 9. The signal from the speed detector 19 is transmitted to the control device 5 via a control cable (not shown). An excessive speed is set in the control device 5. The excessive speed is set to a speed faster than the rated speed of the car 9, for example, 1.3 times the rated speed.

[0044] When the speed of the car 9 becomes excessive, the power supply to the traction machine 3 is cut off by the control device 5. As a result, the traction machine brake 7 is activated, the rotation of the drive sheave 6 is braked, and the car 9 comes to an emergency stop.

[0045] Alternatively, when the speed detector 19 detects an excessive speed, a safety circuit (not shown) can be immediately cut off, thereby cutting off the power supply to the traction machine 3.

[0046] Electrical sensors, optical sensors, mechanical sensors, etc., can be used as speed detectors 19. In addition, absolute value sensors that detect the absolute value of the displacement of the car 9 can be used as speed detectors 19.

[0047] Mechanical sensors include, for example, a detection rotating body, a centrifugal mechanism, and an overspeed detection switch. The detection rotating body rotates while in contact with the car guide rail 11. The centrifugal mechanism is located on the detection rotating body and shifts according to the rotational speed of the detection rotating body. The overspeed detection switch is operated by the centrifugal mechanism when the speed of the car 9 becomes excessive. When the overspeed detection switch is operated, the power supply to the traction machine 3 is cut off.

[0048] Figure 2 It is shown Figure 1 Front view of the relationship between the car guide rail 11 and the emergency stop device 15. Figure 3 It is along Figure 2 A cross-sectional view along line III-III. Figure 4 It is shown Figure 1 A front view of the state of the emergency stop device 15 when it is activated. Figure 5 It is along Figure 4 A cross-sectional view of the VV line.

[0049] The emergency stop device 15 has a frame 21 and a pair of grips 22. One of the grips 22 corresponds to one of the pair of car guide rails 11. The other grip 22 corresponds to the other of the pair of car guide rails 11. Furthermore, the pair of grips 22 are provided on the frame 21. Figures 2-5 In the image, only one of the pair of gripping parts 22 is shown.

[0050] Each gripping part 22 has a pair of wedge components 23, a pair of wedge guides 24, and a plurality of wedge guide springs 25.

[0051] A pair of wedge components 23 are respectively positioned opposite to the corresponding car guide rails 11. Each wedge guide 24 is provided with an inclined surface 24a. The inclined surface 24a approaches the car guide rail 11 as it moves upward.

[0052] Each wedge component 23 can move up and down relative to the frame 21 along the inclined surface 24a of the corresponding wedge guide 24. The wedge guide spring 25 is disposed between the frame 21 and the wedge guide 24.

[0053] Normally, such as Figure 2 As shown, each wedge component 23 is positioned opposite the corresponding car guide rail 11 with a gap between them. In contrast, when the emergency stop device 15 is activated, each wedge component 23 is pulled up. At this time, each wedge component 23 is guided by the inclined surface 24a to approach the car guide rail 11 and come into contact with it.

[0054] As each wedge component 23 is further pulled up, it pushes the wedge guide 24 horizontally by compressing the wedge guide spring 25 while moving upward. The frictional force generated between each car guide rail 11 and the corresponding holding part 22 increases according to the amount of rise of each wedge component 23 relative to the frame 21. As a result, each car guide rail 11 is held by the corresponding holding part 22, and the car 9 comes to an emergency stop.

[0055] Figure 6 It is shown in magnification Figure 1 The structural diagram of the car 9 is shown. The actuating mechanism 17 includes a stop 31, an actuating counterweight 32, and an actuating spring 33.

[0056] A stop 31 is provided on the upper part of the car 9. Furthermore, the stop 31 has a support column 31a and a stop body 31b. The support column 31a stands upright on the upper part of the car 9. The stop body 31b is provided at the upper end of the support column 31a.

[0057] Normally, the moving counterweight 32 is placed on the stop 31. The position of the stop 31 bearing the moving counterweight 32 can be adjusted relative to the car 9 in the vertical direction.

[0058] The upper end of the lifting rod 18 is rotatably connected to the actuating counterweight 32. The lower end of the lifting rod 18 is rotatably connected to the actuating lever 16.

[0059] The actuating spring 33 is disposed between the car 9 and the actuating counterweight 32. Furthermore, normally, the actuating spring 33 is compressed by the weight of the actuating counterweight 32. Therefore, the actuating spring 33 exerts an upward force on the actuating counterweight 32.

[0060] The actuation mechanism 17 is configured such that when the downward acceleration of the car 9 becomes excessive, the actuation counterweight 32 moves upward from the stop 31, and the movement of the actuation counterweight 32 causes the emergency stop device 15 to activate.

[0061] Normally, the stop 31 supports a portion of the weight of the moving counterweight 32. Furthermore, even when bearing the weight of the moving counterweight 32, the stop 31 will not shift or deform in the vertical direction.

[0062] Figure 7 It is shown Figure 6 The diagram shows the structure of the suspension 8 in a broken state. When the car 9 essentially falls freely due to the breakage of the suspension 8, the pressure exerted on the actuating spring 33 by the weight of the actuating counterweight 32 disappears. As a result, the actuating spring 33 extends to its weightless length, which in this example is its natural length.

[0063] At this time, the actuating counterweight 32 moves upward relative to the car 9 and moves away from the stop 31. As a result, the actuating lever 16 is pulled by the lifting lever 18, causing the emergency stop device 15 to activate immediately.

[0064] On the other hand, when the acceleration of the car 9 remains unchanged, that is, when the car 9 is stationary, and when the car 9 is traveling at a constant speed, the action counterweight 32 remains in contact with the stop member 31.

[0065] Here, Figure 8 It shows that it has been removed. Figure 6 A graph showing the relationship between the vertical displacement of the counterweight 32 and time when the stopper 31 is engaged. Figure 8 In the diagram, the horizontal axis represents time, and the vertical axis represents the displacement of the weight 32 in the vertical direction.

[0066] In addition, Figure 8 In the diagram, the thick line C1 represents the displacement of the moving counterweight 32 when the suspension 8 breaks. The thin line C2 represents the displacement of the moving counterweight 32 when the traction brake 7 actuates during the movement of the car 9.

[0067] The solid line L1 represents the normal position of the moving weight 32 after vibration decay. The normal position of the moving weight 32 corresponds to the position of the moving weight 32 determined by the natural length of the moving spring 33, that is, the position of the moving weight 32 when no gravity is actually applied. The moving weight 32 vibrates up and down in its normal position.

[0068] The dashed line L2 indicates the position where each wedge component 23 contacts the car guide rail 11 and the car 9 begins to decelerate via the emergency stop device 15.

[0069] If the deceleration generated in the car 9 is large when the traction machine brake 7 actuates, the moving counterweight 32 will vibrate significantly. Therefore, if... Figure 8 As shown, when the thin line C2 exceeds the straight line L2, each wedge component 23 contacts the car guide rail 11, and the emergency stop device 15 malfunctions.

[0070] Furthermore, even when the average deceleration of the car 9 generated by the action of the traction brake 7 is small, the vibration frequency determined by the mass of the car 9 and the length of the suspension body 8 is sometimes close to the vibration frequency of the moving counterweight 32 during the action of the traction brake 7. In this case, due to resonance with the vibration of the car 9, the vibration of the moving counterweight 32 gradually increases, and the emergency stop device 15 may malfunction before the car 9 stops.

[0071] To prevent the emergency stop device 15 from malfunctioning, for example... Figure 9As shown, a method can be considered to install a damper 34 with a large damping force in parallel with the actuating spring 33 between the car 9 and the actuating counterweight 32.

[0072] Figure 10 This shows the use of damper 34 instead. Figure 6 The graph shows the relationship between the vertical displacement of the moving counterweight 32 and time in the case of the stop 31. In this case, although the moving counterweight 32 moves upward by the action of the traction mechanism brake 7, the wedge member 23 does not reach the position of contacting the guide rail 11. Therefore, malfunction of the emergency stop device 15 is prevented.

[0073] However, the time from the breakage of the suspension body 8 until the contact between each wedge component 23 and the guide rail 11 becomes longer. Therefore, if the descent speed of the car 9 is large at the moment the suspension body 8 breaks, there is a concern that the speed of the car 9 will be too high when the emergency stop device 15 is activated.

[0074] In this regard, such as Figure 6 and Figure 7 As shown, according to the structure of Embodiment 1 using the stopper 31, malfunction of the emergency stop device 15 can be suppressed, and the emergency stop device 15 can be activated quickly in the event of a breakage of the suspension body 8. The reasons for this will be explained in detail below.

[0075] Figure 11 It is shown Figure 6 A graph showing the relationship between the displacement of the moving counterweight 32 in the vertical direction and time in the actuating mechanism 17. Because of the stop 31, the displacement B of the moving counterweight 32 when the suspension 8 breaks is less than... Figure 8 The displacement A is shown. That is, the displacement B is represented by B = A × (1 - α), where the value of α is 0 < α < 1.

[0076] When the stop 31 does not bear the weight of the moving counterweight 32, α = 0. In this case, the moving spring 33 supports the entire weight of the moving counterweight 32, and the displacement of the moving counterweight 32 becomes... Figure 8 The displacement shown.

[0077] When the stop 31 bears the full weight of the actuating counterweight 32, α = 1. In this case, the actuating spring 33 does not function at all.

[0078] When the traction mechanism brake 7 operates with the stop 31 in place, such as Figure 11 As shown by the thin line C2, initially, the moving weight 32 does not move. This is because, since part of the weight of the moving weight 32 is supported by the stop 31, the moving weight 32 will not float until the supporting reaction force of the stop 31 becomes zero.

[0079] Then, when the vibration of the car 9 increases and the acceleration of the moving counterweight 32 increases, the supporting reaction force of the stop 31 becomes 0, and the moving counterweight 32 begins to move upward. However, compared with the case without the stop 31, the maximum upward displacement of the moving counterweight 32 is suppressed to a smaller extent.

[0080] Therefore, the position of the counterweight 32 during the deceleration of the car 9 achieved by the traction mechanism brake 7 will not reach the position where each wedge component 23 contacts the guide rail 11. Thus, the malfunction of the emergency stop device 15 when the traction mechanism brake 7 is activated is suppressed.

[0081] Furthermore, during the deceleration of the car 9 achieved by the traction mechanism brake 7, the time it takes for the moving counterweight 32 to float from the stop 31 is sufficiently short compared to the vibration period when the suspension 8 breaks, as shown by thick line C1. Therefore, the motion of the moving counterweight 32 will not become a periodic vibration like a sine wave. Thus, even if the car 9 continues to vibrate due to the action of the traction mechanism brake 7, the moving counterweight 32 will not resonate with the car 9, thereby more reliably suppressing the malfunction of the emergency stop device 15.

[0082] As described above, by utilizing the simple structure of the stop 31 supporting the action counterweight 32, the emergency stop device 15 can be activated as early as possible without relying on the speed of the car 9 when the suspension 8 breaks, thus enabling the car 9 to stop more safely.

[0083] Furthermore, it can more reliably suppress the malfunction of the emergency stop device 15 when the traction machine brake 7 is activated.

[0084] Furthermore, in Embodiment 1, the position of the stop 31 bearing the moving counterweight 32 can be adjusted in the vertical direction. Therefore, the normal position of the stop 31 bearing the moving counterweight 32 can be easily adjusted for each elevator device. Thus, malfunctions of the emergency stop device 15 can be more reliably suppressed.

[0085] Furthermore, the speed limiter and speed limiter cable can be omitted, thereby reducing equipment costs and enabling space-saving design of shaft 1.

[0086] Furthermore, by omitting the governor cable, the governor cable will not become snagged on shaft equipment during earthquakes or strong winds. This allows for faster recovery after an earthquake.

[0087] Furthermore, the actuation mechanism 17 can be easily applied to elevator systems with high lifts where it is difficult to use speed limiter ropes.

[0088] Furthermore, the inherent vibration frequency determined by the mass of the actuating counterweight 32 and the rigidity of the actuating spring 33 is preferably set to be below the lowest vibration frequency among the vibration frequencies of the vertical vibration generated in the car 9 due to the action of the traction mechanism brake 7. This more reliably suppresses resonance between the actuating counterweight 32 and the car 9.

[0089] The aforementioned minimum vibration frequency is the vibration frequency of the portion of the car 9 extending upwards, which is part of the suspension body 8, at its longest length. Therefore, the aforementioned inherent vibration frequency is preferably set below the vibration frequency of the car 9 in the vertical direction when the traction brake 7 is activated and the car 9 is at the lowest level.

[0090] also, Figure 12 It is shown Figure 6 A graph showing the method for setting the position of the stop 31 in the vertical direction of the counterweight 32. Figure 12 In the middle, the thick line C1, the thin line C2, and the straight line L1 are... Figure 8 same.

[0091] The dashed line L3 represents the average rising position of the moving counterweight 32 when the traction machine brake 7 is activated. The average rising position is the position of the moving counterweight 32 after removing the vibration component of the moving counterweight 32 from the vertical position changes of the moving counterweight 32 when the traction machine brake 7 is activated, with the stop 31 removed. Although the rising position of the moving counterweight 32 when the traction machine brake 7 is activated varies depending on the load conditions of the car 9 and the position of the car within the hoistway 1, the value under the condition of maximum rising is set as the average rising position L3.

[0092] The straight line L4 shown by the single-dot dashed line is positioned vertically by the stop 31 to support the moving counterweight 32.

[0093] The vertical position L4 of the action counterweight 32 supported by the stop 31 is preferably set between the normal position L1 of the action counterweight 32 when the suspension body 8 breaks and the average rising position L3.

[0094] Therefore, when the traction brake 7 is activated, the time it takes for the action counterweight 32 to float from the stop member 31 can be suppressed to a shorter time, and the malfunction of the emergency stop device 15 can be suppressed more reliably.

[0095] In addition, Figure 11In this process, the position of the straight line L2 should be set within the range from the position of the stop 31 bearing the action counterweight 32 in the vertical direction to the straight line L1. That is, the lifting distance of the action rod 16 until each wedge component 23 contacts the guide rail 11 should be set to a distance shorter than the distance from the normal position of the action counterweight 32 to the normal position of the action counterweight 32 when the suspension 8 breaks.

[0096] Therefore, even if the action counterweight 32 does not vibrate when the suspension body 8 breaks, the emergency stop device 15 can be activated more reliably.

[0097] Furthermore, in order to allow the position of the stop 31 bearing the action counterweight 32 to be adjusted vertically, the support column 31a may also be telescopic. In this case, a locking mechanism (not shown) is provided on the support column 31a to lock the telescopic movement of the support column 31a. The telescopic movement of the support column 31a is then allowed by releasing the locking mechanism.

[0098] Alternatively, for example, the stop body 31b can be rotated relative to the support column 31a, thereby enabling the stop body 31b to move in the vertical direction relative to the support column 31a.

[0099] Alternatively, for example, multiple shims (not shown) can be prepared, and by changing the number of shims installed on the stop body 31b, the position of the stop 31 bearing the action counterweight 32 can be adjusted in the vertical direction.

[0100] Implementation method 2.

[0101] Next, Figure 13 This is a structural diagram of the elevator car 9 of the elevator system according to Embodiment 2, showing the state in which the emergency stop device 15 has been activated. The operating mechanism 17 of Embodiment 2, in addition to having the same structure as that of Embodiment 1, also has a low-rebound component 35.

[0102] The low-rebound component 35 is fixed to the upper surface of the stop body 31b. Therefore, normally, the low-rebound component 35 is located between the stop 31 and the actuating counterweight 32.

[0103] A viscoelastic material that combines elasticity and viscosity is used as the material for the low-resilience component 35. Examples of viscoelastic materials include rubber, polyurethane foam, and polymer gel.

[0104] Furthermore, the resilience of the low-rebound component 35 is less than that of the stop component 31. Specifically, the resilience of the low-rebound component 35 is preferably 15% or less. The resilience defined in "JIS K 6400-3" is the ratio obtained by dividing the highest height of the rebounding steel ball obtained by dropping a 16kg steel ball from a height of 500mm by the drop height of 500mm.

[0105] The structure of the elevator device other than the low-rebound component 35 is the same as that in embodiment 1.

[0106] In such an elevator device, if the moving counterweight 32 is lifted from the stop 31 when the traction brake 7 is activated, the moving counterweight 32 will then collide with the stop 31.

[0107] In this embodiment 2, since the stop 31 is provided with a low-rebound member 35, the bounce of the actuating weight 32 is suppressed. Therefore, the vibration behavior of the actuating weight 32 repeatedly bouncing off the stop 31 and colliding with the stop 31 is suppressed.

[0108] This suppresses the resonance between the moving counterweight 32 and the car 9, preventing them from rising significantly, and more reliably suppresses the malfunction of the emergency stop device 15 when the traction machine brake 7 is activated.

[0109] Alternatively, the low-rebound component 35 can be provided on the action counterweight 32, or on both the stop component 31 and the action counterweight 32.

[0110] Implementation method 3.

[0111] Next, Figure 14 This is a structural diagram of the elevator car 9 of the elevator device according to Embodiment 3, showing the state in which the emergency stop device 15 has been activated. The stop 31 of Embodiment 3 is composed only of the stop body 31b of Embodiment 1.

[0112] In embodiment 3, the support spring 36 and the first damper 37 replace the support column 31a in embodiment 1 and are located between the stop 31 and the car 9. That is, the actuation mechanism 17 of embodiment 3 has a stop 31, an actuation counterweight 32, an actuation spring 33, a support spring 36, and a first damper 37.

[0113] The stiffness of the support spring 36 is sufficiently high compared to the stiffness of the actuating spring 33. The first damper 37 is arranged in parallel with the support spring 36 between the stop 31 and the car 9.

[0114] The structure of the elevator device other than the stop 31, the support spring 36 and the first damper 37 is the same as that in embodiment 1.

[0115] In this elevator system, the impact of the moving counterweight 32 colliding with the stop member 31 is mitigated by the support spring 36 and the first damper 37, thus suppressing the bounce of the moving counterweight 32. As a result, the malfunction of the emergency stop device 15 when the traction machine brake 7 is activated can be more reliably suppressed.

[0116] Implementation method 4.

[0117] Next, Figure 15 This is a structural diagram of the elevator car 9 of the elevator system according to Embodiment 4, showing the state in which the emergency stop device 15 has been activated. The operating mechanism 17 of Embodiment 4 has the same structure as that of Embodiment 1, but also includes a second damper 38.

[0118] The second damper 38 is arranged in parallel with the actuating spring 33 between the actuating counterweight 32 and the car 9. In addition, the second damper 38 has a damping force that prevents the actuating counterweight 32 from floating off the stop member 31 when the traction brake 7 is actuated.

[0119] The structure of the elevator device other than the second damper 38 is the same as that in embodiment 1.

[0120] Figure 16 It is shown Figure 15 The graph shows the relationship between the displacement of the moving counterweight 32 in the vertical direction and time in the actuation mechanism 17. When the suspension 8 breaks, the moving counterweight 32 approaches the normal position L1 after one reciprocating vibration due to the damping force of the second damper 38, and comes to rest at the normal position L1.

[0121] On the other hand, when the traction machine brake 7 is activated, the actuating counterweight 32 remains stationary on the stop 31 without levitation due to the damping force of the second damper 38. Therefore, the malfunction of the emergency stop device 15 when the traction machine brake 7 is activated can be suppressed more reliably.

[0122] Alternatively, a second damper 38 may be added to the actuation mechanism 17 shown in Embodiments 2 and 3.

[0123] Implementation method 5.

[0124] Next, Figure 17 This is a structural diagram of the elevator car 9 of the elevator device according to Embodiment 5, showing the state in which the emergency stop device 15 has been activated. The operating mechanism 17 of Embodiment 5, in addition to having the same structure as that of Embodiment 1, also has a guide member 39.

[0125] The guide component 39 is erected on the car 9. Furthermore, the guide component 39 passes through the counterweight 32. Additionally, the guide component 39 guides the movement of the counterweight 32 in the vertical direction.

[0126] The structure of the elevator device other than the guide component 39 is the same as that in Embodiment 1.

[0127] In such an elevator device, the action counterweight 32 can move smoothly upwards when the suspension body 8 breaks, and the emergency stop device 15 can be activated more reliably.

[0128] Alternatively, a guide member 39 may be added to the action mechanism 17 shown in Embodiments 2 to 4.

[0129] Furthermore, the position, shape, and number of guide components 39 are not limited to the examples mentioned above.

[0130] Implementation method 6.

[0131] Next, Figure 18 This is a structural diagram of the elevator car 9 of the elevator system according to Embodiment 6, showing the state in which the emergency stop device 15 has been activated. The operating counterweight 32 of Embodiment 6 includes an operating counterweight body 32a and at least one adjusting counterweight 32b. Figure 18 Two adjustable weights 32b are shown in the figure.

[0132] The mass of each adjusting weight 32b is less than the mass of the moving weight body 32a. Each adjusting weight 32b is held on the moving weight body 32a in such a way that it will not fall off the moving weight body 32a when it is moved.

[0133] The structure of the elevator device other than the moving counterweight 32 is the same as that in Implementation Method 1.

[0134] In such an elevator system, the overall mass of the moving counterweight 32 can be easily adjusted. Therefore, the inherent vibration frequency determined by the mass of the moving counterweight 32 and the rigidity of the moving spring 33 can be easily adjusted, thereby more reliably suppressing resonance between the moving counterweight 32 and the car 9. Therefore, more reliably, the malfunction of the emergency stop device 15 when the traction machine brake 7 operates can be suppressed.

[0135] In addition, the motion counterweight 32 of embodiment 6 can also be applied to embodiments 2 to 5.

[0136] Furthermore, in embodiments 1 to 6, the speed detector 19 may also be installed in the shaft 1, the traction machine 3, or the counterweight 10.

[0137] Implementation method 7.

[0138] Next, Figure 19 This is a schematic structural diagram of the elevator device according to Embodiment 7. In Embodiment 7, the emergency stop device 15 mounted on the car 9 is referred to as the first emergency stop device 15. Furthermore, the actuating lever 16 provided on the first emergency stop device 15 is referred to as the first actuating lever 16. Furthermore, the lifting lever 18 connected to the first actuating lever 16 is referred to as the first lifting lever 18.

[0139] A second emergency stop device 41 is mounted on the lower part of the counterweight 10. The second emergency stop device 41 brings the counterweight 10 to an emergency stop by holding a pair of counterweight guide rails 12. The structure of the second emergency stop device 41 is the same as that of the first emergency stop device 15. That is, a progressive emergency stop device is used as the second emergency stop device 41.

[0140] The second emergency stop device 41 is equipped with a second actuating lever 42. The second emergency stop device 41 is activated by pulling the second actuating lever 42.

[0141] An actuation mechanism 17 is provided on the upper part of the counterweight 10. The structure of the actuation mechanism 17 is the same as that of the actuation mechanism 17 in any of the embodiments 1 to 6, or the structure of the actuation mechanism 17 formed by appropriately combining embodiments 1 to 6.

[0142] The actuation mechanism 17 is connected to the second actuation rod 42 via the second lifting rod 43. Furthermore, when the downward acceleration of the counterweight 10 becomes excessive, the actuation mechanism 17 activates the second emergency stop device 41 via the second lifting rod 43 and the second actuation rod 42. The lifting body in Embodiment 7 is the counterweight 10.

[0143] A speed limiter 51 is installed in the machine room 2. The speed limiter 51 monitors whether the car 9 is traveling at an excessive speed. In addition, the speed limiter 51 has a speed limiter pulley 52, an excessive speed detection switch (not shown), and a rope catcher (not shown).

[0144] A speed governor rope 53 is wound around the speed governor pulley 52. ​​The speed governor rope 53 is laid in a loop inside the shaft 1. In addition, the speed governor rope 53 is connected to the first lifting rod 18. A tension pulley 54 is provided in the pit 1a. The speed governor rope 53 is wound around the tension pulley 54.

[0145] As the car 9 moves up and down, the speed governor rope 53 moves cyclically. As a result, the speed governor pulley 52 rotates at a speed corresponding to the travel speed of the car 9.

[0146] The speed limiter 51 mechanically detects whether the travel speed of the car 9 has reached an excessive speed. The speed limiter 51 has a first excessive speed and a second excessive speed set. The first excessive speed is a speed faster than the rated speed. The second excessive speed is a speed faster than the first excessive speed.

[0147] When the car 9 reaches the first excessive speed, the excessive speed detection switch is activated. As a result, the power supply to the traction machine 3 is cut off, the traction machine brake 7 is activated, and the car 9 comes to an emergency stop.

[0148] When the descent speed of the car 9 reaches the second excessive speed, the speed limiter rope 53 is held by the rope catcher, causing the circulation of the speed limiter rope 53 to stop. As a result, the first emergency stop device 15 is operated by the first lifting lever 18 and the first actuating lever 16, and the first emergency stop device 15 is activated, causing the car 9 to stop urgently.

[0149] The speed detector 19 used in Embodiments 1 to 6 is omitted in Embodiment 7. The other structures of Embodiment 7 are the same as those of Embodiment 1.

[0150] Depending on the structure of the building, it is sometimes required to mount a second emergency stop device 41 on the counterweight 10. In such cases, the actuation mechanism 17 can also be mounted on the counterweight 10. This eliminates the need for the speed governor and speed governor rope used to activate the second emergency stop device 41, thereby reducing equipment costs and saving space in the shaft 1.

[0151] In addition, when the lifting body is a counterweight 10 as in Embodiment 7, the aforementioned minimum vibration frequency is the vibration frequency when the car 9 is located on the top floor.

[0152] Furthermore, in embodiment 7, the speed limiter 51, speed limiter rope 53, and tensioner pulley 54 may be omitted, and the actuation mechanism 17 may also be mounted on the car 9. In this case, excessive speed of the car 9 may be detected, for example, by the speed detector 19.

[0153] Furthermore, in embodiments 1 to 7, although the actuation mechanism 17 is provided on the upper part of the car 9 or the counterweight 10, the actuation mechanism 17 may also be provided on the side or lower part of the car 9 or the counterweight 10.

[0154] Furthermore, in embodiments 1 to 7, the overall layout of the elevator device is not limited to... Figure 1 , Figure 19 The layout. For example, the rope winding method can also be a 2:1 rope winding method.

[0155] In addition, elevator systems can also be machine-room-less elevators, double-decker elevators, or single-shaft multi-car elevator systems. In a single-shaft multi-car system, the upper car and the lower car, located directly below the upper car, each move independently within a shared shaft.

[0156] Label Explanation

[0157] 3: Traction machine; 6: Drive rope pulley; 7: Traction machine brake; 8: Suspension body; 9: Car (lifting body); 10: Counterweight (lifting body); 15: Emergency stop device; 17: Actuating mechanism; 31: Stop; 32: Actuating counterweight; 32a: Actuating counterweight body; 32b: Adjusting counterweight; 33: Actuating spring; 35: Low rebound component; 36: Support spring; 37: First damper; 38: Second damper; 39: Guide component.

Claims

1. An elevator installation, wherein, The elevator device includes: Lifting body; A suspension body that suspends the lifting body; A traction machine having a drive rope sheave around which the suspension body is suspended, and a traction machine brake for braking the rotation of the drive rope sheave; An emergency stop device is installed on the lifting body; as well as An actuating mechanism that activates the emergency stop device. The actuating mechanism has: A stop element is provided on the lifting body; The action counterweight, which is mounted on the stop; and An actuating spring that applies an upward force to the actuating counterweight. Regarding the aforementioned actuation mechanism, when the downward acceleration of the lifting body becomes excessive, the supporting reaction force of the stop on the actuating counterweight becomes zero, the actuating counterweight moves away from the stop, and the emergency stop device is activated by the movement of the actuating counterweight. The elevator device also includes a guide component, which is disposed on the lifting body and guides the movement of the moving counterweight in the vertical direction.

2. An elevator device, wherein, The elevator device includes: Lifting body; A suspension body that suspends the lifting body; A traction machine having a drive rope sheave around which the suspension body is suspended, and a traction machine brake for braking the rotation of the drive rope sheave; An emergency stop device is installed on the lifting body; as well as An actuating mechanism that activates the emergency stop device. The actuating mechanism has: A stop element is provided on the lifting body; The action counterweight, which is mounted on the stop; and An actuating spring that applies an upward force to the actuating counterweight. Regarding the aforementioned actuation mechanism, when the downward acceleration of the lifting body becomes excessive, the actuating counterweight disengages from the stop member, and the movement of the actuating counterweight activates the emergency stop device. The inherent vibration frequency of the moving counterweight, determined by the mass of the moving counterweight and the rigidity of the moving spring, is set to be below the lowest vibration frequency among the vibration frequencies of the vertical vibration generated in the lifting body by the action of the traction mechanism brake.

3. An elevator device, wherein, The elevator device includes: Lifting body; A suspension body that suspends the lifting body; A traction machine having a drive rope sheave around which the suspension body is suspended, and a traction machine brake for braking the rotation of the drive rope sheave; An emergency stop device is installed on the lifting body; as well as An actuating mechanism that activates the emergency stop device. The actuating mechanism has: A stop element is provided on the lifting body; The action counterweight, which is mounted on the stop; and An actuating spring that applies an upward force to the actuating counterweight. Regarding the aforementioned actuation mechanism, when the downward acceleration of the lifting body becomes excessive, the actuating counterweight disengages from the stop member, and the movement of the actuating counterweight activates the emergency stop device. When the stop is removed, and the position of the moving counterweight after excluding the vibration component of the moving counterweight from the vertical position changes of the moving counterweight during the operation of the traction mechanism brake is the average rising position, then... The position of the stop member bearing the moving counterweight in the vertical direction is set between the normal position of the moving counterweight when the suspension breaks and the average rising position.

4. An elevator device, wherein, The elevator device includes: Lifting body; A suspension body that suspends the lifting body; A traction machine having a drive rope sheave around which the suspension body is suspended, and a traction machine brake for braking the rotation of the drive rope sheave; An emergency stop device is installed on the lifting body; as well as An actuating mechanism that activates the emergency stop device. The actuating mechanism has: A stop element is provided on the lifting body; The action counterweight, which is mounted on the stop; and An actuating spring that applies an upward force to the actuating counterweight. Regarding the aforementioned actuation mechanism, when the downward acceleration of the lifting body becomes excessive, the actuating counterweight disengages from the stop member, and the movement of the actuating counterweight activates the emergency stop device. The elevator device also includes a low-rebound component, which is disposed between the stop and the moving counterweight.

5. An elevator device, wherein, The elevator device includes: Lifting body; A suspension body that suspends the lifting body; A traction machine having a drive rope sheave around which the suspension body is suspended, and a traction machine brake for braking the rotation of the drive rope sheave; An emergency stop device is installed on the lifting body; as well as An actuating mechanism that activates the emergency stop device. The actuating mechanism has: A stop element is provided on the lifting body; The action counterweight, which is mounted on the stop; and An actuating spring that applies an upward force to the actuating counterweight. Regarding the aforementioned actuation mechanism, when the downward acceleration of the lifting body becomes excessive, the actuating counterweight disengages from the stop member, and the movement of the actuating counterweight activates the emergency stop device. The elevator device also includes: A support spring, disposed between the stop and the lifting body; and The first damper is disposed in parallel with the support spring between the stop and the lifting body. The stiffness of the support spring is higher than that of the action spring.

6. An elevator device, wherein, The elevator device includes: Lifting body; A suspension body that suspends the lifting body; A traction machine having a drive rope sheave around which the suspension body is suspended, and a traction machine brake for braking the rotation of the drive rope sheave; An emergency stop device is installed on the lifting body; as well as An actuating mechanism that activates the emergency stop device. The actuating mechanism has: A stop element is provided on the lifting body; The action counterweight, which is mounted on the stop; and An actuating spring that applies an upward force to the actuating counterweight. Regarding the aforementioned actuation mechanism, when the downward acceleration of the lifting body becomes excessive, the actuating counterweight disengages from the stop member, and the movement of the actuating counterweight activates the emergency stop device. The elevator device also includes a second damper, which is configured in parallel with the actuating spring.

7. The elevator device according to any one of claims 1 to 6, wherein, The position of the stop member bearing the counterweight of the action can be adjusted in the vertical direction.

8. The elevator device according to any one of claims 1 to 6, wherein, The motion counterweight has: a motion counterweight body; and at least one adjustment counterweight attached to the motion counterweight body.

9. The elevator device according to claim 7, wherein, The motion counterweight has: a motion counterweight body; and at least one adjustment counterweight attached to the motion counterweight body.

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