Displacement suppression device for the car of an elevator

Abstract

A displacement suppression device for an elevator body is provided, which can stably suppress displacement even when the elevator body tilts due to eccentric load. The displacement suppression device (16) includes a first stop and a second stop. The elevator body travels along the guide rail of the elevator (1). The first stop is provided at a first position of the elevator body. The first stop is positioned opposite the guide rail with a first gap. The second stop is provided at a second position of the elevator body. The second position is further away from the center of the elevator body in the vertical direction than the first position. The second stop is positioned opposite the guide rail with a second gap. The second gap is larger than the first gap.

Description

Technical Field

[0001] This invention relates to a displacement suppression device for the lifting body of an elevator. Background Technology

[0002] Patent document 1 discloses an example of an elevator. In this elevator, a seismic plate is provided in the car. The seismic plate works in conjunction with the guide rails to suppress lateral displacement of the car.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: International Publication No. 2005 / 035419 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] However, in the elevator of Patent Document 1, the seismic plate is installed at a point on the upper part of the car, opposite to one of the guide rails. Therefore, if the elevator body, such as the car, tilts due to eccentric loads, the effect of suppressing displacement may change.

[0008] This invention was made to solve such a problem. This invention provides a displacement suppression device for the elevator body, which can stably suppress displacement even when the elevator body tilts due to eccentric load.

[0009] Methods for solving problems

[0010] The displacement suppression device of the present invention comprises: a first stop member disposed at a first position of the elevator body traveling along the guide rail of the elevator, and facing the guide rail separated by a first gap; and a second stop member disposed at a second position of the elevator body, and facing the guide rail separated by a second gap larger than the first gap, wherein the second position is further away from the center of the elevator body in the vertical direction than the first position.

[0011] Invention Effects

[0012] If it is the displacement suppression device of the present invention, then even if the lifting body is tilted due to the off-center load, the displacement of the lifting body can be stably suppressed. Attached Figure Description

[0013] Figure 1 This is a structural diagram of the elevator according to implementation method 1.

[0014] Figure 2 This is a diagram illustrating an example of an off-center load in the car according to Embodiment 1.

[0015] Figure 3 This is a diagram illustrating an example of displacement caused by an off-center load in the car according to Embodiment 1.

[0016] Figure 4 This is the front view of the car in Implementation Method 1.

[0017] Figure 5 This is a horizontal sectional view of the car in Implementation Method 1.

[0018] Figure 6 This is a horizontal sectional view of the stop member in Embodiment 1.

[0019] Figure 7 This is a diagram showing an example of the gap in the displacement suppression device of Embodiment 1.

[0020] Figure 8 This is a diagram illustrating an example of an off-center load in the car according to Embodiment 1.

[0021] Figure 9 This is a diagram illustrating an example of an off-center load in the car according to Embodiment 1.

[0022] Figure 10 This is a diagram illustrating an example of tilting caused by an off-center load in the car of Embodiment 2.

[0023] Figure 11 This is a diagram illustrating an example of displacement caused by an off-center load in the car according to Embodiment 2.

[0024] Figure 12 This is a diagram showing an example of the gap in the displacement suppression device of Embodiment 2.

[0025] Figure 13 This is a top view of the stop component in embodiment 3.

[0026] Figure 14 This is a structural diagram of the displacement suppression device in Embodiment 3.

[0027] Figure 15 This is a structural diagram of the displacement suppression device in the first variation of Embodiment 3.

[0028] Figure 16 This is a structural diagram of the displacement suppression device in the second variation of Embodiment 3.

[0029] Figure 17 This is a hardware structure diagram of the main parts of the displacement suppression device in Embodiment 3. Detailed Implementation

[0030] The embodiments for carrying out the invention will be described with reference to the accompanying drawings. In the drawings, the same or equivalent parts are labeled with the same reference numerals, and repeated descriptions are simplified or omitted as appropriate.

[0031] Implementation method 1.

[0032] Figure 1 This is a structural diagram of elevator 1 according to implementation method 1.

[0033] Elevator 1 is installed in a building 2 with multiple floors. A shaft 3 is provided in building 2. The shaft 3 is a space spanning multiple floors. A machine room 4 is located above the shaft 3 in building 2. A pit 5 is located at the bottom of the shaft 3 in building 2.

[0034] Elevator 1 is equipped with a traction machine 6, main rope 7, car 8 and counterweight 9.

[0035] The traction machine 6 includes a sheave and a motor. The motor of the traction machine 6 is a device that drives the rotation of the sheave of the traction machine 6. The traction machine 6 is, for example, installed in a machine room 4.

[0036] The main rope 7 is wound around the pulley of the traction machine 6. One end of the main rope 7 is connected to the car 8. The other end of the main rope 7 is connected to the counterweight 9. The elevator 1 may also have multiple main ropes 7.

[0037] The car 8 is a device that transports users between multiple floors by traveling vertically within the hoistway 3. The car 8 has a car door 10, which opens and closes to allow users to enter and exit. The counterweight 9 is a device that balances the load applied to both sides of the pulley of the traction machine 6 via the main rope 7. The car 8 and the counterweight 9 are suspended in the hoistway 3 by the main rope 7. The traction machine 6 pulls the main rope 7, thereby causing the car 8 and the counterweight 9 to travel in opposite directions within the hoistway 3. The car 8 and the counterweight 9 are examples of elevators.

[0038] In the hoistway 3, there is a pair of car guide rails 11, a pair of counterweight guide rails 12, and multiple brackets 13.

[0039] A pair of car guide rails 11 guides the movement of the car 8 in the hoistway 3. Each car guide rail 11 is arranged vertically in the hoistway 3. One car guide rail 11 is located on the left side of the car 8. The other car guide rail 11 is located on the right side of the car 8.

[0040] A pair of counterweight guide rails 12 are used to guide the movement of the counterweight 9 in the hoistway 3. Each counterweight guide rail 12 is arranged vertically in the hoistway 3. One counterweight guide rail 12 is located on the left side of the counterweight 9. The other counterweight guide rail 12 is located on the right side of the counterweight 9.

[0041] The elevator car 8 or counterweight 9 travels vertically along the car guide rail 11 or counterweight guide rail 12. The guide rails that guide the travel of the elevator are fixed in the shaft 3 by multiple brackets 13.

[0042] Elevator 1 is equipped with an earthquake detector 14 and a control panel 15.

[0043] Earthquake detector 14 is the part that detects the occurrence of earthquakes. Earthquake detector 14 is, for example, installed in the pit 5. In this case, earthquake detector 14 is, for example, a P-wave detector that detects earthquakes using P-waves (Primary waves). Alternatively, earthquake detector 14 is, for example, installed in the machine room 4. In this case, earthquake detector 14 is, for example, an S-wave detector that detects earthquakes using S-waves (Secondary waves). Earthquake detector 14 can also be installed in both the pit 5 and the machine room 4.

[0044] The control panel 15 is a device for controlling the movement of the elevator 1. The control panel 15 is, for example, located in the machine room 4. The control panel 15 controls the movement of the car 8 and the counterweight 9, for example, by controlling the movement of the traction machine 6. Furthermore, the control panel 15 manages the operating modes of the elevator 1. The operating modes of the elevator 1 include normal operation and earthquake-controlled operation. Normal operation is the mode in which the car 8 moves in response to calls registered by users. Earthquake-controlled operation is the operating mode when an earthquake is detected in the elevator 1 by the earthquake detector 14. In earthquake-controlled operation, the control panel 15, for example, stops the moving car 8 at the nearest floor.

[0045] Figure 2 This is a diagram illustrating an example of an off-center load in the car 8 of Embodiment 1.

[0046] exist Figure 2 The image shows the car 8 as viewed from the front.

[0047] In the car 8, sometimes an off-center load occurs because the user or heavy objects brought in by the user are positioned away from the center of gravity of the car 8. Figure 2 In the example shown, a load is applied biased towards the right side of the car 8. This biased load causes the car 8 to tilt. Since the car 8 is suspended by the main rope 7, it tilts in a manner that rotates around its central portion due to the biased load. Here, the central portion is, for example, the portion containing the height of the car 8's center of gravity. In this example, the car 8 tilts to the right due to the biased load.

[0048] Figure 3 This is a diagram illustrating an example of displacement caused by an off-center load in the car 8 of Embodiment 1.

[0049] exist Figure 3 In the diagram, the vertical axis represents the vertical position within the car 8. Figure 3 In the diagram, the horizontal axis represents the horizontal displacement of the car 8 caused by the eccentric load.

[0050] Because the car 8 tilts in a manner that rotates around its central portion, the horizontal displacement caused by the eccentric load is smaller at the central portion of the car 8. On the other hand, as it moves away from the central portion of the car 8, the horizontal displacement caused by the eccentric load increases. The upper and lower parts of the car 8 shift in opposite directions.

[0051] For example, if the car 8 shifts significantly due to an earthquake, the equipment mounted on the elevator body, such as the car 8, may be affected by the shaking. In this case, damage to the equipment due to the shaking may occur, potentially affecting the operation of the elevator 1. A displacement suppression device 16 is provided in the elevator body of the elevator 1 to prevent such a situation. The displacement suppression device 16 is a device that suppresses horizontal displacement of the elevator body. When the elevator body tilts due to eccentric loads, such as... Figure 3 As shown, the upper and lower parts of the elevator body shift more significantly than the central part. Therefore, even if the displacement of the elevator body is suppressed at a single point in the vertical direction, such as the central part, excessive displacement may still occur in the upper or lower part of the elevator body. Therefore, the displacement suppression device 16 is provided in consideration of the effect of displacement caused by tilting due to eccentric load, so that it can cope with the shaking of an earthquake even when the elevator body tilts due to eccentric load.

[0052] Figure 4 This is the front view of the car 8 in Embodiment 1.

[0053] Displacement suppression device 16 is installed in car 8. Car 8 has car frame 17 and multiple guide shoes 18.

[0054] The car frame 17 includes an upper beam 19, a lower beam 20, and a pair of longitudinal columns 21. The upper beam 19 is a component positioned above the car 8, spanning between the left and right ends. For example, a main rope 7 is installed on the upper beam 19. The lower beam 20 is a component positioned below the car 8, spanning between the left and right ends. The pair of longitudinal columns 21 are components positioned between the upper beam 19 and the lower beam 20. One longitudinal column 21 is positioned at the left end of the car 8. The other longitudinal column 21 is positioned at the right end of the car 8. The left longitudinal column 21 is positioned along the left side of the car guide rail 11 of the car 8. The right longitudinal column 21 is positioned along the right side of the car guide rail 11 of the car 8.

[0055] Multiple guide shoes 18 are portions guided by a pair of car guide rails 11. Each guide shoe 18 is opposite any car guide rail 11. Each guide shoe 18 is, for example, mounted on the car frame 17. Each guide shoe 18 is, for example, disposed at the left or right end of the upper beam 19 or the lower beam 20, etc.

[0056] The displacement suppression device 16 includes multiple stops 22. Each stop 22 is a portion that uses the car guide rail 11 to limit the displacement of the car 8. Each stop 22 has, for example, the same shape. Each stop 22 is mounted on any longitudinal column 21. For example, the same number of stops 22 are mounted on each longitudinal column 21. On each longitudinal column 21, the multiple stops 22 are arranged at equal intervals in the vertical direction. On each longitudinal column 21, the multiple stops 22 are arranged symmetrically about the center. On each longitudinal column 21, five stops 22 are mounted as multiple stops 22. Alternatively, an even number of stops 22 may be mounted on each longitudinal column 21 as multiple stops 22. Furthermore, any stop 22 may be arranged in the vertical direction on the outside of the guide shoe 18. That is, any stop 22 can be positioned above the guide shoe 18 positioned on the upper side of the car 8, such as the upper beam 19, or below the guide shoe 18 positioned on the lower side of the car 8, such as the lower beam 20. In this case, the longitudinal column 21 can also extend to the outside of the guide shoe 18 in the vertical direction. Alternatively, a support body supporting the stop 22 on the outside of the guide shoe 18 can be provided in the car 8.

[0057] The central portion of car 8 is an example of position 1. The position above position 1 in car 8 is an example of position 2. The position even above position 2 in car 8 is an example of position 3. In this example, the interval between position 2 and position 3 is equal to the interval between position 1 and position 2. The position symmetrical to position 2 about the central portion in car 8 is an example of a symmetrical position.

[0058] Each stop 22 is spaced apart and faces the surface of the car guide rail 11. Furthermore, for illustrative purposes, the details are exaggerated. Figure 5 The size of the gap is shown in the figure. The gap between each stop 22 and the surface of the car guide rail 11 is set according to the position of the stop 22 in the car 8.

[0059] In this example, the stop 22 located in the center is an example of a first stop located in the first position. The stop 22 adjacent above the stop 22 located in the center is an example of a second stop located in the second position. The stop 22 adjacent below the stop 22 located in the center is an example of symmetrical stops located in symmetrical positions. The stop 22 located at the top in the car 8 is an example of a third stop located in the third position.

[0060] The first stop is positioned opposite the surface of the car guide rail 11, separating it from the first gap. The second stop is positioned opposite the surface of the car guide rail 11, separating it from the second gap. The third stop is positioned opposite the surface of the car guide rail 11, separating it from the third gap. The second gap is larger than the first gap. The third gap is larger than the second gap.

[0061] Figure 5 This is a horizontal sectional view of the car 8 in Embodiment 1.

[0062] exist Figure 5 The image shows a cross-sectional view taken through a horizontal plane passing through the center of the car 8.

[0063] Each longitudinal column 21 is located at the center of the left and right ends of the car 8 in the front-to-back direction.

[0064] Each stop 22 faces one of the three surfaces of the car guide rail 11: the front surface, the rear surface, and the left and right inner surfaces. Here, the left and right inner surfaces are the sides of the car 8.

[0065] Figure 6 This is a horizontal sectional view of the stop member 22 in Embodiment 1.

[0066] exist Figure 6 The diagram will be shown in a cross-sectional view taken through the horizontal plane of any stop 22.

[0067] In each stop 22, the gap between the front surface of the car guide rail 11 and the stop 22 is smaller than the gap between the left and right inner sides of the car guide rail 11 and the stop 22. Furthermore, the gap between the rear surface of the car guide rail 11 and the stop 22 is smaller than the gap between the left and right inner sides of the car guide rail 11 and the stop 22.

[0068] In each stop 22, the gap between the front surface of the car guide rail 11 and the stop 22 is equal to the gap between the rear surface of the car guide rail 11 and the stop 22. Furthermore, in the stop 22s disposed at the same height on the left and right longitudinal columns 21, the gaps between the left and right inner sides of the car guide rail 11 and the stop 22 are equal to each other.

[0069] Furthermore, there are cases where the off-center load in the car 8 is generated unrelated to the user or any heavy objects brought in by the user. For example, the off-center load in the car 8 might be caused by the winding of the main rope 7, etc. Alternatively, the off-center load in the car 8 might be caused by misalignment of the control cable or compensating rope. In this case, the size of the gap between the front surface of the car guide rail 11 and the stop 22 may differ from the size of the gap between the rear surface of the car guide rail 11 and the stop 22. Moreover, among the stop 22s disposed at the same height on the left and right longitudinal columns 21, the sizes of the gaps between the left and right inner surfaces of the car guide rail 11 and the stop 22 may also be different.

[0070] Figure 7 This is a diagram showing an example of the gap in the displacement suppression device 16 of Embodiment 1.

[0071] exist Figure 7 In the diagram, the vertical axis represents the vertical position within the car 8. Figure 7 In the diagram, the horizontal axis represents the size of the gap between the car guide rail 11 and the stop 22. Figure 7 The image shows the relationship between the gap between the front surface of the car guide rail 11 and the stop 22 and the position of the stop 22 in the vertical direction within the car 8.

[0072] The difference between the gap of the stop 22 located away from the center section and the gap of the stop 22 located at the center section in the car 8 is proportional to the distance from the center section. The distance from the center section is, for example, the absolute value of the height difference from the center section. That is, the sizes of the first gap, the second gap, and the third gap are related to each other, for example, by a linear function of the distance from the center section of the car 8. Furthermore, as... Figure 7 As shown, the relationship between the gap between the front surface of the car guide rail 11 and the stop 22 and the position of the stop 22 in the vertical direction in the car 8 is symmetrical about the central part.

[0073] Furthermore, in this example, the relationship between the gap between the rear surface of the car guide rail 11 and the stop 22 and the position of the stop 22 in the vertical direction within the car 8 is also related to... Figure 7 The relationship shown is the same. Furthermore, the relationship between the gaps between the left and right inner sides of the car guide rail 11 and the stop 22, and the position of the stop 22 in the vertical direction within the car 8, is also the same as... Figure 7 The relationships shown are the same.

[0074] By having multiple stoppers 22 with such gaps, the displacement suppression device 16 can suppress the displacement of the upper or lower part of the car 8 even when the car 8 tilts due to eccentric load. Thus, the displacement suppression device 16 can stably suppress the displacement of the car 8 caused by shaking due to earthquakes, etc., even when the car 8 tilts due to eccentric load.

[0075] Figure 8 and Figure 9 This is a diagram illustrating an example of an off-center load in the car 8 of Embodiment 1.

[0076] exist Figure 8 and Figure 9 The image shows the car 8 as viewed from above.

[0077] exist Figure 8 During this process, a lateral load is generated in the left and right directions. Under the condition of the lateral load in the left and right directions, the car 8 tilts to the left and right. At this time, the displacement suppression device 16 suppresses the displacement of the car 8 caused by swaying and other factors through either the left or right car guide rail 11.

[0078] On the other hand, Figure 9 During this process, a eccentric load is generated in the front-to-back direction. When this eccentric load occurs, the car 8 tilts in the front-to-back direction. At this time, the displacement suppression device 16 suppresses the displacement of the car 8 caused by swaying or other factors via the left and right car guide rails 11. Therefore, the gap between the surface of the car guide rail 11 used to suppress displacement in the front-to-back direction and the stop member 22 is smaller than the gap between the surface of the car guide rail 11 used to suppress displacement in the left-to-right direction and the stop member 22.

[0079] Alternatively, the displacement suppression device 16 may include a component that is continuously connected in the vertical direction to the end of the side opposite to the car guide rail 11 between the first stop and the second stop. Or, in the displacement suppression device 16, some or all of the plurality of stops 22 may be part of a component that is continuously provided in the vertical direction on the longitudinal column 21.

[0080] Furthermore, the displacement suppression device 16 can also be installed on the counterweight 9, which serves as the lifting body. In this case, the displacement suppression device 16 installed on the counterweight 9 functions in the same way as the displacement suppression device 16 installed on the car 8, thereby suppressing the displacement of the counterweight 9. The eccentric load in the counterweight 9 may be generated, for example, due to the winding of the main rope 7, etc. Alternatively, the eccentric load in the counterweight 9 may be generated, for example, due to the misalignment of the position where the compensating rope is installed.

[0081] As described above, the displacement suppression device 16 of the elevator body in Embodiment 1 includes a first stop and a second stop. The elevator body travels along the guide rail of the elevator 1. The first stop is provided at a first position of the elevator body. The first stop is positioned opposite the guide rail with a first gap. The second stop is provided at a second position of the elevator body. The second position is further away from the center of the elevator body in the vertical direction than the first position. The second stop is positioned opposite the guide rail with a second gap. The second gap is larger than the first gap.

[0082] With this structure, the displacement suppression device 16 can suppress horizontal displacement caused by swaying or the like, even when the elevator body tilts due to eccentric load, where the upper or lower part has shifted more significantly than the central part of the elevator body due to tilting. Therefore, even when the elevator body tilts due to eccentric load, the displacement suppression device 16 can stably suppress displacement of the elevator body caused by swaying due to earthquakes or the like. Specifically, in the first position where the displacement caused by eccentric load is smaller than the second position, the first gap is smaller than the second gap, thus stably suppressing displacement of the elevator body caused by swaying due to earthquakes or the like. Furthermore, in the second position where the displacement caused by eccentric load is larger than the first position, the second gap is larger than the first gap, thus suppressing contact between the second stop and the guide rail during normal operation, even when the elevator body tilts due to eccentric load. Therefore, the generation of abnormal noise, vibration, or impact caused by contact between the guide rail and the stop 22 can be suppressed. Therefore, the comfort of the user riding in the car 8 is less likely to be compromised. Therefore, by means of displacement suppression device 16, even when the lifting body is tilted due to eccentric load, it is possible to suppress the displacement of the lifting body caused by shaking due to earthquakes, etc., and to suppress the contact between the guide rail and the stop 22 during normal operation.

[0083] Furthermore, the displacement suppression device 16 includes symmetrical stops. The symmetrical stops are positioned symmetrically to the lifting body. The symmetrical positions are those symmetrical to the second position about the center of the lifting body in the vertical direction. The symmetrical stops are positioned opposite the guide rail, separated by a gap of the same size as the second gap.

[0084] With this structure, even if the upper or lower part tilts due to eccentric load and moves close to the guide rail, the displacement suppression device 16 can stably suppress the displacement of the lifting body caused by shaking due to earthquakes, etc.

[0085] Furthermore, the displacement suppression device 16 includes a third stop. The third stop is located in a third position. This third position is further away from the center of the lifting body in the vertical direction than the second position. The third stop is positioned opposite the guide rail, separated by a third gap. The third gap is larger than the second gap. The sizes of the first gap, the second gap, and the third gap are interconnected by a linear function relating their distances from the center.

[0086] With this structure, the displacement suppression device 16 can suppress the displacement of the lifting body caused by swaying or other factors along the surface of the linear guide rail. Therefore, the displacement suppression device 16 can more stably suppress the displacement of the lifting body caused by swaying due to earthquakes or other factors.

[0087] Furthermore, the first stop faces each of the three surfaces of the guide rail: the front surface, the rear surface, and the left and right inner surfaces. The second stop faces each of the three surfaces of the guide rail: the front surface, the rear surface, and the left and right inner surfaces. The second clearance between the second stop and the front surface of the guide rail is larger than the first clearance between the second stop and the front surface of the guide rail. The second clearance between the second stop and the rear surface of the guide rail is larger than the first clearance between the second stop and the left and right inner surfaces of the guide rail.

[0088] With this structure, the displacement of the lifting body is suppressed by the guide rails in three directions. As a result, displacement suppression can be performed more stably.

[0089] Furthermore, at least one of the first gap between the guide rail and the front surface of the guide rail and the first gap between the guide rail and the rear surface of the guide rail is smaller than the first gap between the guide rail and the inner surface of the guide rail.

[0090] Furthermore, at least one of the second gap between the guide rail and the front surface of the guide rail and the second gap between the guide rail and the rear surface of the guide rail is smaller than the second gap between the guide rail and the inner surface of the guide rail.

[0091] In this structure, the size of the gap for suppressing displacement is adjusted according to factors such as the tendency of the lifting body to tilt. Therefore, situations where displacement cannot be adequately suppressed due to an excessively large gap can be avoided. Furthermore, situations where the stop 22 contacts the guide rail due to an excessively small gap can be prevented. Thus, abnormal noises, vibrations, or impacts caused by contact between the guide rail and the stop 22 can be suppressed. Therefore, the comfort of the user riding in the car 8 is less likely to be compromised.

[0092] Furthermore, the multiple stop members 22 arranged vertically in the elevator body such as the car 8 can also be arranged at unequal intervals. For example, the multiple stop members 22 can also be arranged such that the vertical interval between adjacent stop members is smaller the further away from the center of the elevator body. In this case, for a stop member 22 located above the center, the vertical interval between it and its upper adjacent stop member 22 is smaller than the vertical interval between it and its lower adjacent stop member 22. Similarly, for a stop member 22 located below the center, the vertical interval between it and its lower adjacent stop member 22 is smaller than the vertical interval between it and its upper adjacent stop member 22.

[0093] The upper end of the longitudinal column 21 is connected to the upper beam 19, and the lower end of the longitudinal column 21 is connected to the lower beam 20. Therefore, the further away from the center, the greater the horizontal rigidity of the longitudinal column 21. In positions of high rigidity, the longitudinal column 21 is less prone to deformation even when subjected to a reaction force from the guide rail via the stop 22. Since the longitudinal column 21 is less likely to deform by detaching from the guide rail, the displacement suppression effect of the lifting body is less likely to decrease in the stop 22 located in positions of high rigidity. Therefore, by arranging multiple stop 22s in a manner that increases in density further away from the center, the displacement of the lifting body can be effectively suppressed in positions of high rigidity of the longitudinal column 21.

[0094] Implementation method 2.

[0095] In Embodiment 2, the differences from the example disclosed in Embodiment 1 are described in particular detail. Any feature of the example disclosed in Embodiment 1 may be used for features not described in Embodiment 2.

[0096] Figure 10 This is a diagram illustrating an example of tilting caused by an off-center load in the car 8 of Embodiment 2.

[0097] exist Figure 10 The image shows the car 8 as viewed from the front.

[0098] When the car 8 tilts due to eccentric load, the car guide rail 11 may sometimes bend or deform due to the reaction force from the car 8.

[0099] Figure 11 This is a diagram illustrating an example of displacement caused by an off-center load in the car 8 of Embodiment 2.

[0100] exist Figure 11 In the diagram, the vertical axis represents the vertical position within the car 8. Figure 11 In the diagram, the horizontal axis represents the horizontal displacement of the car 8 caused by the eccentric load, and the displacement caused by the deformation of the car guide rail 11.

[0101] The clearance between the car guide rail 11 and the stop 22 varies depending on the difference between the displacement caused by the tilt of the car 8 and the displacement caused by the deformation of the car guide rail 11 due to the tilt. Here, the car guide rail 11 may deform in a curved manner in the vertical direction.

[0102] Figure 12 This is a diagram showing an example of the gap in the displacement suppression device 16 of Embodiment 2.

[0103] exist Figure 12 In the diagram, the vertical axis represents the vertical position within the car 8. Figure 12 In the diagram, the horizontal axis represents the size of the gap between the car guide rail 11 and the stop 22. Figure 12 The image shows the relationship between the gap between the front surface of the car guide rail 11 and the stop 22 and the position of the stop 22 in the vertical direction within the car 8.

[0104] The difference between the gap of the stop 22 located away from the center in the car 8 and the gap of the stop 22 located at the center follows a monotonically increasing function related to the distance from the center. Here, this function is a nonlinear function predetermined based on the tilt of the car 8 caused by the off-center load and the deformation of the car guide rail 11 caused by this tilt. This function can be, for example, a convex function or a concave function related to the distance from the center. That is, when the displacement suppression device 16 has a first stop, a second stop, and a third stop, the sizes of the first gap, the second gap, and the third gap are related to the distance from the center of the car 8 according to this function.

[0105] Furthermore, in this example, the relationship between the gap between the rear surface of the car guide rail 11 and the stop 22 and the position of the stop 22 in the vertical direction within the car 8 can also be related to... Figure 12 The relationship shown is the same. Furthermore, the relationship between the gaps between the left and right inner sides of the car guide rail 11 and the stop 22, and the position of the stop 22 in the vertical direction within the car 8, can also be the same as... Figure 12 The relationships shown are the same.

[0106] As explained above, the displacement suppression device 16 of Embodiment 2 includes a third stop. The third stop is located at a third position. This third position is further away from the center of the lifting body in the vertical direction than the second position. The third stop is positioned opposite the guide rail, separated by a third gap. The third gap is larger than the second gap. The sizes of the first gap, the second gap, and the third gap are related to each other as a function of their distance from the center. This function is a nonlinear function based on the tilt caused by the eccentric load on the lifting body and the deformation of the guide rail caused by this tilt.

[0107] In this structure, the displacement suppression device 16 can suppress the displacement of the lifting body caused by swaying, etc., taking into account the deformation of the guide rail. Therefore, even when the guide rail is deformed, the displacement suppression device 16 can stably suppress the displacement of the lifting body caused by swaying due to earthquakes, etc.

[0108] Implementation method 3.

[0109] In Embodiment 3, the differences from the examples disclosed in Embodiment 1 or Embodiment 2 are described in particular detail. Any feature of the examples disclosed in Embodiment 1 or Embodiment 2 may be used for features not described in Embodiment 3.

[0110] Figure 13 This is a top view of the stop 22 in embodiment 3.

[0111] exist Figure 13 The stop 22 is shown in the image above.

[0112] In the displacement suppression device 16, multiple stop members 22, including a first stop member, a second stop member, a third stop member, and a symmetrical stop member, each have one or more sets of shoe 23 and actuator 24. In this example, the stop member 22 has three sets of shoe 23 and actuator 24. In any one of the three sets, the shoe 23 faces the front surface of the car guide rail 11. In another of the three sets, the shoe 23 faces the rear surface of the car guide rail 11. In the remaining one of the three sets, the shoe 23 faces the left and right inner sides of the car guide rail 11. In each set, the actuator 24 changes the gap between the car guide rail 11 and the shoe 23 by moving the shoe 23. Alternatively, in some or all of the multiple stop members 22, any one or any two sets of shoe 23 and actuator 24 may be omitted.

[0113] The shoe 23 in each group of the first stop is an example of the first shoe. The car guide rail 11 is opposite the first shoe, separated by a first gap. The actuator 24 in each group of the first stop is an example of the first actuator. The shoe 23 in each group of the second stop is an example of the second shoe. The car guide rail 11 is opposite the second shoe, separated by a second gap. The actuator 24 in each group of the second stop is an example of the second actuator.

[0114] Figure 14 This is a structural diagram of the displacement suppression device 16 in Embodiment 3.

[0115] exist Figure 14 The image shows the car 8 as viewed from the front.

[0116] A weighing device 25 is provided in the car 8. The weighing device 25 is located in the lower part of the car 8. The weighing device 25 is an example of an off-center load measuring unit for measuring off-center loads in the car 8. The weighing device 25 is equipped with the function of outputting the measured off-center load to an external device.

[0117] The displacement suppression device 16 includes a control unit 26. The control unit 26 controls the operation of the actuators 24 in each stop 22. The control unit 26 is, for example, located on the upper part of the car 8. Alternatively, the control unit 26 may be mounted on the control panel 15 of the elevator 1. Alternatively, the displacement suppression device 16 may have an independent control unit 26 corresponding to each stop 22. Alternatively, the displacement suppression device 16 may have an independent control unit 26 corresponding to each actuator 24. The control unit 26 is connected to an off-center load measuring unit such as a weighing device 25 in a manner that allows the measurement results of the off-center load of the car 8 to be obtained.

[0118] Next, an example of the operation of the displacement suppression device 16 will be explained.

[0119] During normal operation, the weighing device 25 measures the off-center load in the car 8. The weighing device 25 outputs the measured off-center load to the control unit 26.

[0120] The control unit 26 calculates the tilt of the car 8 based on the off-center load input from the weighing device 25. Based on the calculated tilt of the car 8, the control unit 26 calculates the change in the gap between each stop 22 and the car guide rail 11. Based on the calculated change in gap, the control unit 26 actuates each actuator 24, causing the gap between each stop 22 and the car guide rail 11 to contract within a predetermined range. This range is predetermined in a way that allows the displacement of the car 8 during shaking, such as earthquakes, to be suppressed by the car guide rail 11.

[0121] On the other hand, during earthquake control operation, the actuators 24 and the weighing device 25 maintain a narrow gap between the car guide rail 11 and each shoe 23 regardless of the measurement results of the off-center load. As a result, the displacement of the car 8 caused by earthquake shaking is suppressed by the car guide rail 11.

[0122] Additionally, a tilt measuring unit (not shown) may be installed in the car 8. The tilt measuring unit measures the tilt of the car 8. It may be located, for example, at the top or bottom of the car 8. The tilt measuring unit may include, for example, a tilt sensor, an accelerometer, or a gyroscope sensor. The tilt measuring unit is equipped with the function of outputting the tilt measurement result of the car 8.

[0123] During normal operation, the control unit 26 calculates the change in clearance between each stop 22 and the car guide rail 11 based on the tilt of the car 8 input from the tilt measurement unit. The control unit 26 actuates each actuator 24 according to the calculated change in clearance, so that the clearance between the shoe 23 of each stop 22 and the car guide rail 11 is reduced to within a preset range.

[0124] On the other hand, during earthquake control operation, each actuator 24 maintains a narrow gap between the car guide rail 11 and each shoe 23, regardless of the tilt measurement results from the tilt measuring unit. Thus, the car guide rail 11 suppresses displacement of the car 8 caused by earthquake shaking, etc.

[0125] Furthermore, a load cell, such as a force sensor (not shown), may be installed in the car 8. The load cell may be installed, for example, in at least one guide shoe 18. The load cell is a device that measures the horizontal reaction force borne by the guide shoe 18 from the car guide rail 11. Since the horizontal reaction force borne by the guide shoe 18 depends on the tilt of the car 8, the load cell is used to measure the tilt of the entire car frame 17. That is, the load cell functions as another example of a tilt measurement unit. Because the tilt of the entire car frame 17 is measured using a load cell system, it is also possible to measure, for example, tilts caused by misalignment of the control cables or compensating ropes.

[0126] Figure 15 This is a structural diagram of the displacement suppression device 16 in the first variation of Embodiment 3.

[0127] exist Figure 15 The image shows the car 8 as viewed from the front.

[0128] A camera 27 is provided inside the car 8. The camera 27 is installed inside the car 8. The camera 27 calculates the eccentric load in the car 8 by image recognition and other means based on the captured images of the interior of the car 8. In this example, the camera 27 is an example of an eccentric load measuring unit that measures the eccentric load in the car 8. The control unit 26 calculates the tilt of the car 8 based on the eccentric load information input from the camera 27, which is an example of an eccentric load measuring unit. The control unit 26 actuates each actuator 24 according to the calculated tilt of the car 8.

[0129] Figure 16 This is a structural diagram of the displacement suppression device 16 in the second variation of Embodiment 3.

[0130] exist Figure 16 The stop 22 is shown in the image above.

[0131] The displacement suppression device 16 includes a clearance measuring unit 28. The clearance measuring unit 28 measures the clearance between the car guide rail 11 and the stop member 22. The clearance measuring unit 28 measures the clearance of at least one of a plurality of stop members 22, including a first stop member, a second stop member, a third stop member, and symmetrical stop members. In this example, the clearance measuring unit 28 measures the clearance between the first stop member and the second stop member.

[0132] The gap measuring unit 28 has multiple distance sensors 29. In this example, two distance sensors 29 correspond to the first stop. One distance sensor 29 measures the gap between the shoe 23 and the front surface, which faces the front surface of the car guide rail 11. The other distance sensor 29 measures the gap between the shoe 23 and the inner surface, which faces the left and right inner surfaces of the car guide rail 11. The multiple distance sensors 29 of the gap measuring unit 28 include two distance sensors 29 that measure the gap in the same way as the second stop. The gap measuring unit 28 outputs the size of each gap measured by the multiple distance sensors 29 to the control unit 26.

[0133] The control unit 26 actuates each actuator 24 based on the gap size input from the gap measuring unit 28, causing the gap between the shoe 23 of each stop 22 and the car guide rail 11 to contract within a predetermined range. The control unit 26 can also estimate the gap between the shoe 23 opposite the rear surface of the car guide rail 11 and the front surface, for example, based on a measured value of the gap between the shoe 23 opposite the front surface of the car guide rail 11 and the front surface. In this case, the control unit 26 actuates each actuator 24 based on the estimated gap size, causing the gap between the shoe 23 of each stop 22 and the car guide rail 11 to contract within a predetermined range. Furthermore, the control unit 26 can also estimate the tilt of the car 8 based on the gap size measured by the distance sensor 29 installed on any stop 22. In this case, the control unit 26 actuates each actuator 24 based on the estimated tilt. Here, the control unit 26 can also activate each actuator 24 based on the estimated tilt of the stop 22, which is not measured by the gap measuring unit 28.

[0134] On the other hand, during earthquake control operation, the gap between the car guide rail 11 and each shoe 23 is maintained at a narrow state regardless of the gap measurement results of each actuator 24 and the gap measuring unit 28. As a result, the displacement of the car 8 caused by earthquake shaking is suppressed by the car guide rail 11.

[0135] Furthermore, the control cables or compensating ropes installed in the car 8 vary depending on the position of the car 8. Therefore, for example, if an off-center load is generated in the car 8 due to misalignment of the control cables, the off-center load on the car 8 also varies according to the position of the car 8. In this case, the control unit 26 can also estimate the off-center load, tilt, or clearance between the car guide rail 11 and the stop member 22 of the car 8 based on the position of the car 8. The control unit 26 activates each actuator 24 based on the estimation result of the position of the car 8.

[0136] Furthermore, when the displacement suppression device 16 is installed in the counterweight 9, which serves as the lifting body, wiring can be connected to the counterweight 9 to supply power and conduct signal communication to the displacement suppression device 16. Alternatively, the counterweight 9 can also carry a battery or the like to supply power to the displacement suppression device 16. Furthermore, the displacement suppression device 16 can also receive power and conduct signal communication wirelessly, for example.

[0137] As explained above, in the displacement suppression device 16 of Embodiment 3, the first stop includes a first shoe and a first actuator. The first shoe is positioned opposite the guide rail, separated by a first gap. The first actuator changes the size of the first gap by moving the first shoe. The second stop includes a second shoe and a second actuator. The second shoe is positioned opposite the guide rail, separated by a second gap. The second actuator changes the size of the second gap by moving the second shoe.

[0138] In this structure, the clearance size can be adjusted according to the position of the lifting body, the state of off-center load, or tilt, so that the clearance size can be adjusted during normal operation without hindering the movement of the lifting body. Therefore, even if the state of the lifting body changes due to off-center load caused by the entry or exit of users, the displacement of the lifting body caused by earthquake shaking can be suppressed according to the changed state of the lifting body.

[0139] Furthermore, the off-center load measuring unit measures the off-center load of the lifting body. The first actuator changes the size of the first clearance based on the tilt of the lifting body caused by the off-center load measured by the off-center load measuring unit. The second actuator changes the size of the second clearance based on the tilt of the lifting body caused by the off-center load measured by the off-center load measuring unit.

[0140] In addition, the tilt measuring unit measures the tilt of the lifting body. The first actuator changes the size of the first gap based on the tilt of the lifting body measured by the tilt measuring unit. The second actuator changes the size of the second gap based on the tilt of the lifting body measured by the tilt measuring unit.

[0141] Furthermore, the displacement suppression device 16 includes a gap measuring unit 28. The gap measuring unit 28 measures the size of at least one of a first gap and a second gap. The first actuator changes the size of the first gap based on the gap size measured by the gap measuring unit 28. The second actuator changes the size of the second gap based on the gap size measured by the gap measuring unit 28.

[0142] In this structure, the size of the gap can be varied according to the actual measured state of the lifting body, thus allowing for more precise adjustment of the gap size during normal operation. Especially when measuring the gap between the guide rail and the stop 22, adjustments can be made to the gap size reflecting conditions such as guide rail deformation.

[0143] Next, use Figure 17 An example of the hardware structure of the displacement suppression device 16 will be described.

[0144] Figure 17 This is a hardware structure diagram of the main parts of the displacement suppression device 16 in Embodiment 3.

[0145] The functions of the displacement suppression device 16 can be implemented by a processing circuit. The processing circuit has at least one processor 100a and at least one memory 100b. The processing circuit may also have at least one dedicated hardware 200, either in conjunction with or as an alternative to the processor 100a and memory 100b.

[0146] When the processing circuit includes a processor 100a and a memory 100b, the functions of the displacement suppression device 16 are implemented by software, firmware, or a combination of software and firmware. At least one of the software and firmware is described as a program. The program is stored in the memory 100b. The processor 100a implements the functions of the displacement suppression device 16 by reading and executing the program stored in the memory 100b.

[0147] The processor 100a is also called a CPU (Central Processing Unit), processing device, arithmetic device, microprocessor, microcomputer, or DSP. The memory 100b is composed of non-volatile or volatile semiconductor memories such as RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable Read Only Memory), and EEPROM (Electrically Erasable Programmable Read Only Memory).

[0148] When the processing circuit has dedicated hardware 200, the processing circuit can be implemented, for example, by a single circuit, a composite circuit, a programming processor, a parallel programming processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a combination thereof.

[0149] Each function of the displacement suppression device 16 can be implemented separately by the processing circuit. Alternatively, each function of the displacement suppression device 16 can also be implemented centrally by the processing circuit. Regarding each function of the displacement suppression device 16, some can be implemented by dedicated hardware 200, and others by software or firmware. Thus, the processing circuit implements each function of the displacement suppression device 16 through dedicated hardware 200, software, firmware, or a combination thereof.

[0150] Industrial availability

[0151] The displacement suppression device of the present invention can be applied to the lifting body of an elevator.

[0152] Label Explanation

[0153] 1: Elevator; 2: Building; 3: Shaft; 4: Machine room; 5: Pit; 6: Traction machine; 7: Main rope; 8: Car; 9: Counterweight; 10: Car door; 11: Car guide rail; 12: Counterweight guide rail; 13: Bracket; 14: Seismic detector; 15: Control panel; 16: Displacement suppression device; 17: Car frame; 18: Guide shoe; 19: Upper beam; 20: Lower beam; 21: Longitudinal column; 22: Stop; 23: Shoe; 24: Actuator; 25: Weighing device; 26: Control unit; 27: Camera; 28: Gap measuring unit; 29: Distance sensor; 100a: Processor; 100b: Memory; 200: Dedicated hardware.

Claims

1. A displacement suppression device for the lifting body of an elevator, wherein, The displacement suppression device of the elevator body includes: The first stop is located at the first position in the middle of the elevator body traveling along the elevator guide rail in the vertical direction, and is positioned opposite the guide rail with a first gap. A second stop is disposed at a second position on the lifting body, and is positioned opposite the guide rail with a second gap larger than the first gap. The second position is located vertically away from the first position. A symmetrical stop is provided on the lifting body at a position symmetrical to the second position about the first position in the vertical direction, and is positioned opposite the guide rail with a gap of the same size as the second gap.

2. The displacement suppression device for the elevator lifting body according to claim 1, wherein, The displacement suppression device of the elevator body includes a third stop, which is disposed at a third position on the elevator body and is positioned opposite the guide rail with a third gap larger than the second gap. The third position is further away from the first position in the vertical direction than the second position. The sizes of the first gap, the second gap, and the third gap are related to each other as a linear function of their distance from the central portion.

3. The displacement suppression device for the elevator lifting body according to claim 1, wherein, The displacement suppression device of the elevator body includes a third stop, which is disposed at a third position on the elevator body and is positioned opposite the guide rail with a third gap larger than the second gap. The third position is further away from the first position in the vertical direction than the second position. The sizes of the first gap, the second gap, and the third gap are related to each other by a nonlinear function of their distance from the central portion. This nonlinear function is based on the tilt caused by the off-center load of the lifting body and the amount of deformation of the guide rail caused by the tilt.

4. The displacement suppression device for the elevator lifting body according to claim 1, wherein, The displacement suppression device of the elevator body includes multiple stops, including the first stop and the second stop. The plurality of stop members are arranged vertically on the lifting body, and are configured such that the further away from the first position, the smaller the vertical distance between them and the adjacent stop members.

5. The displacement suppression device for the elevator lifting body according to claim 2, wherein, The displacement suppression device of the elevator body includes multiple stops, including the first stop and the second stop. The plurality of stop members are arranged vertically on the lifting body, and are configured such that the further away from the first position, the smaller the vertical distance between them and the adjacent stop members.

6. The displacement suppression device for the elevator lifting body according to claim 3, wherein, The displacement suppression device of the elevator body includes multiple stops, including the first stop and the second stop. The plurality of stop members are arranged vertically on the lifting body, and are configured such that the further away from the first position, the smaller the vertical distance between them and the adjacent stop members.

7. The displacement suppression device for the elevator body according to any one of claims 1 to 6, wherein, The first stop member includes: A first boot, which is separated from the first gap and opposite the guide rail; and The first actuator changes the size of the first gap by moving the first shoe. The second stop member has: A second boot, which is separated from the second gap and opposite the guide rail; and The second actuator changes the size of the second gap by moving the second shoe.

8. The displacement suppression device for the elevator body according to claim 7, wherein, The first actuator changes the size of the first gap based on the tilt of the lifting body caused by the tilt of the lifting body due to the tilt measured by the tilt measuring unit that measures the tilt load of the lifting body. The second actuator changes the size of the second gap based on the tilt of the lifting body caused by the off-center load measured by the off-center load measuring unit.

9. The displacement suppression device for the elevator lifting body according to claim 7, wherein, The first actuator changes the size of the first gap based on the tilt of the lifting body measured by the tilt measuring unit. The second actuator changes the size of the second gap based on the tilt of the lifting body measured by the tilt measuring unit.

10. The displacement suppression device for the elevator body according to claim 7, wherein, The displacement suppression device of the elevator body includes a gap measuring unit that measures the size of at least one of the first gap and the second gap. The first actuator changes the size of the first gap based on the size of the gap measured by the gap measuring unit. The second actuator changes the size of the second gap based on the size of the gap measured by the gap measuring unit.

11. The displacement suppression device for the elevator body according to any one of claims 1 to 6 and 8 to 10, wherein, The first stop is opposite to each of the three surfaces of the guide rail: the front surface, the rear surface, and the left and right inner surfaces. The second stop is opposite to each of the three surfaces of the guide rail: the front surface, the rear surface, and the left and right inner surfaces. The second gap between the guide rail and the front surface is larger than the first gap between the guide rail and the front surface. The second gap between the guide rail and the rear surface is larger than the first gap between the guide rail and the rear surface. The second gap between the guide rail and the left and right inner sides is larger than the first gap between the guide rail and the left and right inner sides.

12. The displacement suppression device for the elevator body according to claim 7, wherein, The first stop is opposite to each of the three surfaces of the guide rail: the front surface, the rear surface, and the left and right inner surfaces. The second stop is opposite to each of the three surfaces of the guide rail: the front surface, the rear surface, and the left and right inner surfaces. The second gap between the guide rail and the front surface is larger than the first gap between the guide rail and the front surface. The second gap between the guide rail and the rear surface is larger than the first gap between the guide rail and the rear surface. The second gap between the guide rail and the left and right inner sides is larger than the first gap between the guide rail and the left and right inner sides.

13. The displacement suppression device for the elevator body according to claim 11, wherein, At least one of the first gap between the guide rail and the front surface of the guide rail and the first gap between the guide rail and the rear surface of the guide rail is smaller than the first gap between the guide rail and the left and right inner surfaces of the guide rail.

14. The displacement suppression device for the elevator body according to claim 12, wherein, At least one of the first gap between the guide rail and the front surface of the guide rail and the first gap between the guide rail and the rear surface of the guide rail is smaller than the first gap between the guide rail and the left and right inner surfaces of the guide rail.

15. The displacement suppression device for the elevator body according to claim 11, wherein, At least one of the second gap between the guide rail and the front surface of the guide rail and the second gap between the guide rail and the rear surface of the guide rail is smaller than the second gap between the guide rail and the left and right inner surfaces of the guide rail.

16. The displacement suppression device for the elevator body according to any one of claims 12 to 14, wherein, At least one of the second gap between the guide rail and the front surface of the guide rail and the second gap between the guide rail and the rear surface of the guide rail is smaller than the second gap between the guide rail and the left and right inner surfaces of the guide rail.

Images