EP3363759B1 - Elevator device - Google Patents
Elevator device Download PDFInfo
- Publication number
- EP3363759B1 EP3363759B1 EP15906210.8A EP15906210A EP3363759B1 EP 3363759 B1 EP3363759 B1 EP 3363759B1 EP 15906210 A EP15906210 A EP 15906210A EP 3363759 B1 EP3363759 B1 EP 3363759B1
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- European Patent Office
- Prior art keywords
- fly weight
- fly
- weight
- ratchet wheel
- inertia mass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000033001 locomotion Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 6
- 230000002411 adverse Effects 0.000 description 5
- 239000000470 constituent Substances 0.000 description 5
- 230000003028 elevating effect Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 238000005360 mashing Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
- B66B5/044—Mechanical overspeed governors
- B66B5/046—Mechanical overspeed governors of the pendulum or rocker arm type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
- B66B5/26—Positively-acting devices, e.g. latches, knives
Definitions
- the present invention relates to an elevator device, and more particularly, to an elevator device provided with a governor device to operate an emergency stop device.
- an elevator device is provided with a governor device to electrically stop a hoisting device for a car when an elevating speed of the car becomes a first set value.
- the governor device operates an emergency stop device to mechanically stop the car.
- Patent Literature 1 Japanese Patent Application Laid-Open No. 2012-188260 shows a ratchet type governor device.
- the governor device mainly has a ratchet wheel and two fly weights.
- a pawl (ratchet) attached to an end of the fly weight is meshed with ratchet teeth of the ratchet wheel.
- the ratchet wheel is rotated with the sheave.
- a brake shoe driven by the rotation of the ratchet wheel applies a braking force to the governor rope between the brake shoe and the sheave to operate the emergency stop device.
- patent literature 2 shows a speed governor for an elevator in which a governor sheave is rotatably supported in a case.
- An endless governor rope connected with a car is wound around and hung on the outer peripheral part of the governor sheave.
- a speed detection switch is installed in the vicinity of the governor sheave.
- a flyweight constituted by combining a plurality of member is rotatably supported, and is rotated due to centrifugal force when the governor sheave is rotated.
- a switch operation part abutting on and operating the speed detection switch when the rotational speed of the governor sheave exceeds a predetermined value is provided above the flyweight.
- the fly weight is provided in an outer peripheral part of the ratchet wheel.
- the pawl is attached to the end of the fly weight.
- the governor device is downsized, then a ratchet wheel having a small diameter is used, and the inertia mass of the ratchet wheel is also reduced.
- the inertia mass of the ratchet wheel is smaller than the inertia mass of the fly weight, upon collision between the ratchet teeth of the ratchet wheel and the pawl of the fly weight by flay-away of the fly weight, a phenomenon that the ratchet wheel is flipped with the pawl of the fly weight may occur.
- the object of the present invention is to provide an elevator device having a novel governor device to infallibly realize meshing between ratchet teeth of a ratchet wheel and a pawl of a fly weight.
- a weight support shaft to rotatably support a fly weight for fly-away of the fly weight as a border
- a pawl to be meshed with a ratchet teeth of a ratchet wheel is attached to one region side of the fly weight
- an inertia mass adjusting unit having a shape to adjust the inertia mass of the fly weight to that equivalent to or smaller than the inertia mass of the ratchet wheel, is provided on the other region side of the fly weight.
- the present invention by adjusting the inertia mass of the fly weight to that equivalent to or smaller than the inertia mass of the ratchet wheel, it is possible to infallibly realize meshing between the ratchet teeth of the ratchet wheel and the pawl of the fly weight. With this configuration, it is possible to eliminate the adverse effects such as delay of the operation of the emergency stop device.
- FIG. 1 shows a governor device 10 to which the present invention is applied.
- the governor device 10 has a frame 12 placed on a governor base 11.
- a sheave 14 is rotatably supported inside the frame 12 via a sheave shaft 13.
- a governor rope 15 is put around the sheave 14.
- the governor rope 15 runs integrally with a car of the elevator. With the running, the sheave 14 is rotated about the sheave shaft 13.
- a ratchet wheel 16 is provided on one side surface side of the sheave 14.
- the ratchet wheel 16 is supported with the sheave shaft 13, and is rotated about the sheave shaft 13 separately from the sheave 14.
- Plural ratchet teeth 17 are formed at an equal angle on the outer periphery of the ratchet wheel 16.
- the ratchet teeth 17 are inclined in a rotation direction. With this configuration, the ratchet wheel 16 is rotated in one direction.
- fly weights 18A and 18B are provided on the same side surface side of the sheave 14 where the ratchet wheel 16 is provided. These fly weights 18A and 18B are provided approximately symmetrically opposite to each other with the ratchet wheel 16 between them. The fly weights are respectively rotatably attached to the side surface of the sheave 14 via a weight support shaft (not shown).
- fly weights 18A and 18B (the fly weight 18A in the present embodiment) is provided with a pawl (ratchet) 28 to be meshed with the ratchet teeth 17 of the ratchet wheel 16.
- the fly weights 18A and 18B and the ratchet wheel 16 will be described in detail in Figure 2 and the subsequent figures.
- the ratchet wheel 16 is connected to a brake mechanism 19.
- the brake mechanism 19 has a brake arm 20.
- One end of the brake arm 20 is rotatably connected to the frame 12 via a pin 21.
- a connecting rod 22 is inserted through the other end of the brake arm 20.
- One end of the connecting rod 22 is rotatably connected via a pin (not shown) to one side surface of the ratchet wheel 16.
- a brake spring 23 is provided between the other end of the connecting rod 22 and the brake arm 20. Further, a brake shoe 24 is attached to an intermediate part of the brake arm 20. The brake shoe 24 is provided to be opposite to the governor rope 15 put around the sheave 14.
- the brake spring 23 is compressed. With the compressive force, the brake shoe 24 is pressed via the brake arm 20 against the governor rope 15. With this pressing force, a braking force is applied to the governor rope 15 with the brake shoe 24 and the sheave 14.
- a car stop switch 25 to generate a switch signal to operate a braking mechanism of an unshown hoisting device is attached in the vicinity of the sheave 14.
- the car stop switch 25 is configured such that when an elevating speed of the car becomes a first set value, e.g. 1.3 times of a rated speed, a switch mechanism of the car stop switch 25 is operated with a convex member formed at an end on the opposite side to the side of the fly weights 18A and 18B.
- the brake mechanism 19 operated with the ratchet wheel 16 applies a braking force to the governor rope 15, to operate the emergency stop device, to stop the car.
- the governor rope 15 runs integrally with the car. With this running, the sheave 14 is rotated about the sheave shaft 13. At this time, the ratchet wheel 16 is not rotated.
- the sheave 14 is rotated in the counterclockwise direction. Then, when the car moves downward at a speed beyond a rated speed, the rotational speed of the sheave 14 is increased.
- the fly weights 18A and 18B are rotated, with the centrifugal force of the rotation of the sheave, about the weight support shaft and fly away outward. With this fly-away operation, the pawl 28 of one of the fly weights i.e. the fly weight 18A, is meshed with the ratchet teeth 17 of the ratchet wheel 16. With this meshing, the ratchet wheel 16 is rotated integrally with the sheave 14, about the sheave shaft 13, in the counterclockwise direction.
- the rotation operation of the ratchet wheel 16 is transmitted via the connecting rod 22 to the brake mechanism 19.
- the brake mechanism 19 is operated, the governor rope 15 put around the sheave 14 is pressed against the sheave 14, and the running of the governor rope 15 is stopped.
- the emergency stop device of the car which is moving down is operated, then a braking force is applied to the car, and the downward movement of the car is stopped.
- a support base 26 integrally connected to the sheave 14 is rotatably supported with the sheave shaft 13.
- Weight support shafts 27A and 27B are planted on the surface of a part of the support base 26 positioned on the outside of the unshown ratchet wheel 16.
- the fly weights 18A and 18B are formed in approximately the same shape, and respectively rotatably supported with the respective weight support shafts 27A and 27B in predetermined positions.
- the pawl 28, to be disengageably meshed with the ratchet teeth 17 of the ratchet wheel 16, is attached to an end of the region SA with the short arm-length from the weight support shaft 27A.
- a protruding part 29A to operate the car stop switch 25 is provided at an end of the region LA with the long arm-length from the weight support shaft 27A.
- the short arm-length region SA is provided with a pawl attachment part to which the pawl 28 is attached
- the long arm-length region LA is provided with an inertia mass adjusting unit to reduce the inertia mass of the fly weight 18A. This inertia mass adjusting unit will be described later.
- the pawl 28 is not attached to the short arm-length region SA of the other fly weight 18B.
- a protruding part 29B to operate the car top switch 5 is provided at an end of the long arm-length region LA. Accordingly, one of the protruding parts 29A and 29B operates the car stop switch 5.
- an intermediate part of the long arm-length region LA on the fly weight 18A side and an intermediate part of the short arm-length region SA on the fly weight 18B are connected to the connecting member 31 with pins 30A and 30B.
- the connecting member 31 performs an action to interlock motions of the fly weight 18A and the fly weight 18B.
- a spring member with adjustment function 32 is provided at the end of the short arm-length region SA of the fly weight 18A and the end formed in the vicinity of the center of the support base 26, to adjust meshing with the pawl 28 of the fly weight 18A.
- the pawl 28 of the fly weight 18A in a normal status, the pawl 28 of the fly weight 18A is in a position away from the ratchet wheel 16, and the ratchet teeth 17 and the pawl 28 are not meshed with each other. Then, when the elevating speed of the car becomes the first set value, e.g., 1.3 times of the rated speed, the fly weights 18A and 18B receive a centrifugal force.
- the long arm-length regions LA fly away outward with the respective weight support shafts 27A and 27B as centers.
- the short arm-length regions SA move inward.
- the protruding parts 29A and 29B of the fly weights 18A and 18B are rotated in directions away from the ratchet wheel 16.
- the protruding parts 29A and 29B are protruded to the outside from their normal status, and one of the protruding parts 29A and 29B operates the car stop switch 5 shown in Figure 1 .
- the fly weights 18A and 18B receive a larger centrifugal force.
- the long arm-length regions LA fly away further outward with the weight support shafts 27A and 27B as centers.
- the short arm-length regions SA move inward.
- the pawl 28 provided at the end of the short arm-length region SA of the fly weight 18A is meshed with the ratchet teeth 17 of the ratchet wheel 163.
- the ratchet wheel 16 is rotated in the counterclockwise direction in synchronization with the fly weights 18A and 18B, and the sheave 14, to operate the brake mechanism 19.
- an inertia mass adjusting unit 33A is formed in the long arm-length region LA, to reduce the inertia mass of this part.
- the inertia mass adjusting unit 33A is provided with a thin part 34A and a through hole 35A.
- the inertia mass adjusting unit 33A is formed in a part of the long arm-length region LA.
- the thickness of the inertia mass adjusting unit 33A is thinner in comparison with the thickness of the long arm-length region LA and the short arm-length region SA other than the inertia mass adjusting unit 33A. Accordingly, the mass is reduced by the thinned thin part 34A.
- a through hole 35A is formed in the thin part 34A, and the mass is further reduced by the through hole 35A.
- the thin part 34A and the through hole 35A are formed in adjusting shapes to reduce the inertia mass of the fly weight 18A.
- the inertia mass adjusting unit 33A is formed in a part of the long arm-length region LA, it is possible to reduce the inertia moment of the fly weight 18A. Even when the distance b from the center of the weight support shaft 27A to the protruding part 29A is increased and the distance a from the center of the weight support shaft 27A to the meshing part of the pawl 28 is reduced, it is possible to reduce the inertia mass of the fly weight 18A.
- the mass reduced with the inertia mass adjusting unit 33A is determined such that the inertia mass of the fly weight 18A becomes equivalent to or smaller than the inertia mass of the ratchet wheel 16. Note that in the present embodiment, it is determined such that the inertia mass of the fly weight 18A becomes smaller than the inertia mass of the ratchet wheel 16.
- the inertia mass adjusting unit 33B is formed in a part of the long arm-length region LA of the fly weight 18B. With this configuration, it is possible to maintain balance between the inertia mass of the fly weight 18B and the inertia mass of the fly weight 18A.
- a thin part 34B and a through hole 35B are formed in the inertia mass adjusting unit 33B.
- the fly weight 18A and the fly weight 18B have approximately the same shape. As the pawl 28 is not attached to the fly weight 18B, the fly weight 18A and the fly weight 18B do not have completely the same shape.
- the inertia mass adjusting units 33A and 33B including the thin parts 34A and 34B and the through holes 35A and 35B do not have completely the same shape. In this manner, there is no problem as long as the inertia mass of the fly weight 18A and the inertia mass of the fly weight 18B balance. Thus there is no problem as long as their shapes are similar.
- the inertia mass of the fly weight 18A is smaller than the inertia mass of the ratchet wheel.
- the thickness of the thin parts 34A and 34B of the inertia mass adjusting units 33A and 33B is determined to be about 1/2 in comparison with the thickness of the long arm-length region LA and the short arm-length region SA other than the inertia mass adjusting units 33A and 33B.
- the large rotation force from the sheave 14 is given via the weight support shaft 27A and the short arm-length region SA of the fly weight 18A to the pawl 28. Accordingly, it is advantageous to increase the thickness of the short arm-length region SA as in the case of the present embodiment.
- the long arm-length region LA as the large force from the sheave 14 does not act, there is no problem to reduce the thickness to reduce the inertia mass.
- the shape of the through hole 35A has a round shape, however, even a polygonal shape or elliptic shape other than the round shape is applicable as the through hole 35A. Further, there is no problem that it is not a through hole but e.g. a bottomed concave shape.
- the inertia mass adjusting unit 33A is formed at least on the end side from a portion where the pin 30A connecting the connecting member 31 to the fly weight 18A is provided. With this configuration, an attachment surface of the connecting member 31 is set at the same height in the fly weights 18A and 18B. In a case where the pin 30A is provided in the thin inertia mass adjusting unit 33A in the fly weight 18A, as the fly weight 18B side is the thick short arm-length region SA, the connecting member 31 is attached in an inclined status. This is disadvantageous attachment status in the mechanism.
- the inertia mass adjusting unit 33A is formed with the thin part 34A and the through hole 35A. It goes without saying that the inertia mass adjusting unit 33A may be formed with only one of the thin part 34A and the through hole 35A.
- the weight support shaft which rotatably supports the fly weight for fly-away of the fly weight as a border
- the pawl meshed with the ratchet teeth of the ratchet wheel is attached to one region side of the fly weight.
- the inertia mass adjusting unit having a shape to adjust the inertia mass of the fly weight to that equivalent to or smaller than the inertia mass of the ratchet wheel is provided on the other region side of the fly weight.
- the present invention is not limited to the above-described embodiment, but various modifications are included.
- the above embodiment has been described in detail for explaining the present invention, and the invention is not necessarily limited to an embodiment having all the described constituent elements.
- a part of constituent element of an embodiment may be replaced with those of another embodiment.
- constituent elements of an embodiment may be added to those of another embodiment.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Emergency Lowering Means (AREA)
Description
- The present invention relates to an elevator device, and more particularly, to an elevator device provided with a governor device to operate an emergency stop device.
- In general, an elevator device is provided with a governor device to electrically stop a hoisting device for a car when an elevating speed of the car becomes a first set value. When a descending speed of the car becomes a second set value, the governor device operates an emergency stop device to mechanically stop the car.
- In a recent governor device, a ratchet type small governor device is used. For example, Japanese Patent Application Laid-Open No.
2012-188260 - The governor device mainly has a ratchet wheel and two fly weights. When the fly weights rotated along with a sheave which a rope is put around move so as to be opened outward by a centrifugal force (hereinbelow, referred to as "fly-away"), a pawl (ratchet) attached to an end of the fly weight is meshed with ratchet teeth of the ratchet wheel. When the pawl of the fly weight is meshed with the ratchet teeth of the ratchet wheel, the ratchet wheel is rotated with the sheave. A brake shoe driven by the rotation of the ratchet wheel applies a braking force to the governor rope between the brake shoe and the sheave to operate the emergency stop device.
Furthermore, patent literature 2 shows a speed governor for an elevator in which a governor sheave is rotatably supported in a case. An endless governor rope connected with a car is wound around and hung on the outer peripheral part of the governor sheave. A speed detection switch is installed in the vicinity of the governor sheave. In the governor sheave, a flyweight constituted by combining a plurality of member is rotatably supported, and is rotated due to centrifugal force when the governor sheave is rotated. A switch operation part abutting on and operating the speed detection switch when the rotational speed of the governor sheave exceeds a predetermined value is provided above the flyweight. -
- PTL 1: Japanese Patent Laid-Open No.
2012-188260 - PTL 2:
JP 2006 143394 A - In the ratchet type governor device as disclosed in the Patent Literature 1, the fly weight is provided in an outer peripheral part of the ratchet wheel. The pawl is attached to the end of the fly weight. When the pawl of the fly weight enters a root part of one of the plural ratchet teeth formed on the outer periphery of the ratchet wheel, by fly-away of the fly weight, then the pawl is meshed with the ratchet teeth and the ratchet wheel is rotated.
- As described above, there is a tendency that the governor device is downsized, then a ratchet wheel having a small diameter is used, and the inertia mass of the ratchet wheel is also reduced. However, when the inertia mass of the ratchet wheel is smaller than the inertia mass of the fly weight, upon collision between the ratchet teeth of the ratchet wheel and the pawl of the fly weight by flay-away of the fly weight, a phenomenon that the ratchet wheel is flipped with the pawl of the fly weight may occur.
- With this phenomenon, it is not possible to realize excellent meshing between the ratchet teeth of the ratchet wheel and the pawl of the fly weight. This may cause adverse effects such as delay of the operation of the emergency stop device. Accordingly, there is a strong need for development of a governor device to infallibly mesh the ratchet teeth of the ratchet wheel with the pawl of the fly weight.
- The object of the present invention is to provide an elevator device having a novel governor device to infallibly realize meshing between ratchet teeth of a ratchet wheel and a pawl of a fly weight.
- The above problem is solved by the subject matter of the appended claims. In particular with a weight support shaft to rotatably support a fly weight for fly-away of the fly weight as a border, a pawl to be meshed with a ratchet teeth of a ratchet wheel is attached to one region side of the fly weight, while an inertia mass adjusting unit having a shape to adjust the inertia mass of the fly weight to that equivalent to or smaller than the inertia mass of the ratchet wheel, is provided on the other region side of the fly weight.
- According to the present invention, by adjusting the inertia mass of the fly weight to that equivalent to or smaller than the inertia mass of the ratchet wheel, it is possible to infallibly realize meshing between the ratchet teeth of the ratchet wheel and the pawl of the fly weight. With this configuration, it is possible to eliminate the adverse effects such as delay of the operation of the emergency stop device.
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Figure 1 is a side view showing main parts of a governor device to which the present invention is applied. -
Figure 2 is a rear view of a fly weight according to an embodiment of the present invention viewed from the rear side. -
Figure 3 is a side view showing positional relationship between a ratchet wheel and the fly weight according to the embodiment of the present invention. -
Figure 4A is a front view of the fly weight according to the embodiment of the present invention. -
Figure 4B is a side view of the fly weight according to the embodiment of the present invention. - Next, an embodiment of the present invention will be described in detail using the drawings. The present invention is not limited to the following embodiment, but includes various modifications and applications in the technical conception of the present invention in its scope.
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Figure 1 shows agovernor device 10 to which the present invention is applied. Thegovernor device 10 has aframe 12 placed on agovernor base 11. Asheave 14 is rotatably supported inside theframe 12 via asheave shaft 13. Agovernor rope 15 is put around thesheave 14. Thegovernor rope 15 runs integrally with a car of the elevator. With the running, thesheave 14 is rotated about thesheave shaft 13. - A
ratchet wheel 16 is provided on one side surface side of thesheave 14. Theratchet wheel 16 is supported with thesheave shaft 13, and is rotated about thesheave shaft 13 separately from thesheave 14.Plural ratchet teeth 17 are formed at an equal angle on the outer periphery of theratchet wheel 16. Theratchet teeth 17 are inclined in a rotation direction. With this configuration, theratchet wheel 16 is rotated in one direction. - Further, a pair of
fly weights sheave 14 where theratchet wheel 16 is provided. Thesefly weights ratchet wheel 16 between them. The fly weights are respectively rotatably attached to the side surface of thesheave 14 via a weight support shaft (not shown). - Further, one of the
fly weights fly weight 18A in the present embodiment) is provided with a pawl (ratchet) 28 to be meshed with theratchet teeth 17 of theratchet wheel 16. Thefly weights ratchet wheel 16 will be described in detail inFigure 2 and the subsequent figures. - The
ratchet wheel 16 is connected to abrake mechanism 19. Thebrake mechanism 19 has abrake arm 20. One end of thebrake arm 20 is rotatably connected to theframe 12 via apin 21. A connectingrod 22 is inserted through the other end of thebrake arm 20. One end of the connectingrod 22 is rotatably connected via a pin (not shown) to one side surface of theratchet wheel 16. - A
brake spring 23 is provided between the other end of the connectingrod 22 and thebrake arm 20. Further, abrake shoe 24 is attached to an intermediate part of thebrake arm 20. Thebrake shoe 24 is provided to be opposite to thegovernor rope 15 put around thesheave 14. When theratchet wheel 16 is rotated in a counterclockwise direction inFigure 1 and the connectingrod 22 is pulled, thebrake spring 23 is compressed. With the compressive force, thebrake shoe 24 is pressed via thebrake arm 20 against thegovernor rope 15. With this pressing force, a braking force is applied to thegovernor rope 15 with thebrake shoe 24 and thesheave 14. - A
car stop switch 25 to generate a switch signal to operate a braking mechanism of an unshown hoisting device is attached in the vicinity of thesheave 14. Thecar stop switch 25 is configured such that when an elevating speed of the car becomes a first set value, e.g. 1.3 times of a rated speed, a switch mechanism of thecar stop switch 25 is operated with a convex member formed at an end on the opposite side to the side of thefly weights - Further, when it is detected with the
fly weights brake mechanism 19 operated with theratchet wheel 16 applies a braking force to thegovernor rope 15, to operate the emergency stop device, to stop the car. - In the governor device having the above configuration, upon running of the elevator device, the
governor rope 15 runs integrally with the car. With this running, thesheave 14 is rotated about thesheave shaft 13. At this time, theratchet wheel 16 is not rotated. When the car moves downward, thesheave 14 is rotated in the counterclockwise direction. Then, when the car moves downward at a speed beyond a rated speed, the rotational speed of thesheave 14 is increased. Thefly weights pawl 28 of one of the fly weights i.e. thefly weight 18A, is meshed with theratchet teeth 17 of theratchet wheel 16. With this meshing, theratchet wheel 16 is rotated integrally with thesheave 14, about thesheave shaft 13, in the counterclockwise direction. - The rotation operation of the
ratchet wheel 16 is transmitted via the connectingrod 22 to thebrake mechanism 19. With this transmission, thebrake mechanism 19 is operated, thegovernor rope 15 put around thesheave 14 is pressed against thesheave 14, and the running of thegovernor rope 15 is stopped. Then with the stoppage of thegovernor rope 15, the emergency stop device of the car which is moving down is operated, then a braking force is applied to the car, and the downward movement of the car is stopped. Thus safety is ensured. - Then as described above, in a case where the inertia mass of the
ratchet wheel 16 is smaller than the inertia mass of thefly weight 18A provided with thepawl 28, when theratchet teeth 17 of theratchet wheel 16 collides with thepawl 28 of thefly weight 18A by fly-away of thefly weight 18A, a phenomenon that theratchet wheel 16 is flipped with thepawl 28 of thefly weight 18A occurs. Accordingly, it is not possible to realize excellent meshing between theratchet teeth 17 of theratchet wheel 16 and thepawl 28 of thefly weight 18A. This may cause adverse effects such as delay of the operation of the emergency stop device. - Accordingly, in the present embodiment, to reduce the inertial mass of the
fly weight 18A provided with thepawl 28, proposed is a configuration in which thepawl 28 to be meshed with theratchet teeth 17 of theratchet wheel 16 is attached to one region side of thefly weight 18A, further, an inertia mass adjusting unit to adjust the inertia mass of thefly weight 18A to that equivalent to or smaller than the inertia mass of theratchet wheel 16, is formed on the other region side of thefly weight 18A. - Hereinbelow, the fly weight used in the governor device according to the present embodiment will be described in detail using
Figure 2 to Figure 4B . - In
Figure 2 to Figure 4B , asupport base 26 integrally connected to thesheave 14 is rotatably supported with thesheave shaft 13.Weight support shafts support base 26 positioned on the outside of theunshown ratchet wheel 16. Thefly weights weight support shafts - The
fly weights sheave shaft 13 as a center, and have regions with different arm lengths from the respectiveweight support shafts Figure 3 , in thefly weight 18A, with theweight support shaft 27A as a border, a short arm-length region SA (=one region) and a long arm-length region LA (= other region) are formed. With this configuration, the long arm-length region LA of thefly weight 18A moves outward by a centrifugal force. On the other hand, the short arm-length region SA of thefly weight 18A moves inward. Note that thefly weight 18B has approximately the same configuration and performs the same operation. - In the
fly weight 18A, thepawl 28, to be disengageably meshed with theratchet teeth 17 of theratchet wheel 16, is attached to an end of the region SA with the short arm-length from theweight support shaft 27A. Further, in thefly weight 18A, a protrudingpart 29A to operate thecar stop switch 25 is provided at an end of the region LA with the long arm-length from theweight support shaft 27A. Note that the short arm-length region SA is provided with a pawl attachment part to which thepawl 28 is attached, and the long arm-length region LA is provided with an inertia mass adjusting unit to reduce the inertia mass of thefly weight 18A. This inertia mass adjusting unit will be described later. - Note that the
pawl 28 is not attached to the short arm-length region SA of theother fly weight 18B. Aprotruding part 29B to operate the car top switch 5 is provided at an end of the long arm-length region LA. Accordingly, one of the protrudingparts - Further, an intermediate part of the long arm-length region LA on the
fly weight 18A side and an intermediate part of the short arm-length region SA on thefly weight 18B are connected to the connectingmember 31 withpins member 31 performs an action to interlock motions of thefly weight 18A and thefly weight 18B. Further, a spring member withadjustment function 32 is provided at the end of the short arm-length region SA of thefly weight 18A and the end formed in the vicinity of the center of thesupport base 26, to adjust meshing with thepawl 28 of thefly weight 18A. - As shown in
Figure 2 andFigure 3 , in a normal status, thepawl 28 of thefly weight 18A is in a position away from theratchet wheel 16, and theratchet teeth 17 and thepawl 28 are not meshed with each other.
Then, when the elevating speed of the car becomes the first set value, e.g., 1.3 times of the rated speed, thefly weights weight support shafts - In this manner, the protruding
parts fly weights ratchet wheel 16. With this configuration, the protrudingparts parts Figure 1 . - Similarly, when the descending speed of the car becomes the second set value, e.g. 1.4 times of the rated speed, the
fly weights weight support shafts - With this configuration, the
pawl 28 provided at the end of the short arm-length region SA of thefly weight 18A is meshed with theratchet teeth 17 of the ratchet wheel 163. Theratchet wheel 16 is rotated in the counterclockwise direction in synchronization with thefly weights sheave 14, to operate thebrake mechanism 19. - When the
fly weights ratchet wheel 16 to downsize thegovernor device 10, as shown inFigure 4A , it is necessary to reduce a distance a from the center of theweight support shaft 27A of thefly weight 18A to a meshing part of thepawl 28. - On the other hand, when the elevating speed of the car becomes the first set value, to operate the
car stop switch 25 on the outside of thesheave 14, it is necessary to increase a distance b from the center of theweight support shaft 27A of thefly weight 18A to theprotruding part 29A. Naturally the area of the long arm-length region LA is increased, and in accordance with the increase of the area, the inertia mass is increased. Accordingly the inertia moment of thefly weight 18A is increased. - Assuming that the inertia moment of the
fly weight 18A is Io, and the distance from the center of theweight support shaft 27A to the end of thepawl 28 is a, the inertia mass m of thefly weight 18A is obtained with an expression, m = Io/a2. Accordingly, when the distance b from the center of theweight support shaft 27A to theprotruding part 29A is increased, further, the distance a from the center of theweight support shaft 27A to the mashing part of thepawl 28 is reduced, from the above expression, the inertia mass of thefly weight 18A is increased. Accordingly, in comparison with the inertia mass of theratchet wheel 16, the inertia mass of thefly weight 18A is increased. - Accordingly, as shown in
Figure 3 , by the fly-away of thefly weight 18A, upon collision between theratchet teeth 17 of theratchet wheel 16 and thepawl 28 of thefly weight 18A, a phenomenon that theratchet wheel 16 is flipped with thepawl 28 of thefly weight 18A occurs. - As shown in
Figure 2 to Figure 4B , in the present embodiment, with theweight support shaft 27A of thefly weight 18A as a border, an inertiamass adjusting unit 33A is formed in the long arm-length region LA, to reduce the inertia mass of this part. - In the present embodiment, the inertia
mass adjusting unit 33A is provided with athin part 34A and a throughhole 35A. As shown inFigure 3 , in thefly weight 18A, with asupport hole 36A through which theweight support shaft 27A is inserted as a border, the short arm-length region SA (= one region) and the long arm-length region LA (= other region) are formed. - Then the inertia
mass adjusting unit 33A is formed in a part of the long arm-length region LA. The thickness of the inertiamass adjusting unit 33A is thinner in comparison with the thickness of the long arm-length region LA and the short arm-length region SA other than the inertiamass adjusting unit 33A. Accordingly, the mass is reduced by the thinnedthin part 34A. Further, a throughhole 35A is formed in thethin part 34A, and the mass is further reduced by the throughhole 35A. Thethin part 34A and the throughhole 35A are formed in adjusting shapes to reduce the inertia mass of thefly weight 18A. - In this manner, as the inertia
mass adjusting unit 33A is formed in a part of the long arm-length region LA, it is possible to reduce the inertia moment of thefly weight 18A. Even when the distance b from the center of theweight support shaft 27A to theprotruding part 29A is increased and the distance a from the center of theweight support shaft 27A to the meshing part of thepawl 28 is reduced, it is possible to reduce the inertia mass of thefly weight 18A. - Note that the mass reduced with the inertia
mass adjusting unit 33A is determined such that the inertia mass of thefly weight 18A becomes equivalent to or smaller than the inertia mass of theratchet wheel 16. Note that in the present embodiment, it is determined such that the inertia mass of thefly weight 18A becomes smaller than the inertia mass of theratchet wheel 16. - Further, the inertia
mass adjusting unit 33B is formed in a part of the long arm-length region LA of thefly weight 18B. With this configuration, it is possible to maintain balance between the inertia mass of thefly weight 18B and the inertia mass of thefly weight 18A. In the inertiamass adjusting unit 33B, athin part 34B and a throughhole 35B are formed. Thefly weight 18A and thefly weight 18B have approximately the same shape. As thepawl 28 is not attached to thefly weight 18B, thefly weight 18A and thefly weight 18B do not have completely the same shape. - Further, the inertia
mass adjusting units thin parts holes fly weight 18A and the inertia mass of thefly weight 18B balance. Thus there is no problem as long as their shapes are similar. - In this manner, in the present embodiment, the inertia mass of the
fly weight 18A is smaller than the inertia mass of the ratchet wheel. Upon collision between theratchet teeth 17 of theratchet wheel 16 and thepawl 28 of thefly weight 18A by the fly-away of thefly weight 18A, it is possible to suppress the phenomenon that theratchet wheel 16 is flipped with thepawl 28 of thefly weight 18A. - Accordingly, it is possible to realize excellent meshing between the ratchet teeth of the ratchet wheel and the pawl of the fly weight, and eliminate occurrence of adverse effects such as delay of the operation of the emergency stop device.
- Then, it is confirmed by the inventors' study that as long as the thickness of the
thin parts mass adjusting units mass adjusting units thin parts mass adjusting units mass adjusting units - Note that the large rotation force from the
sheave 14 is given via theweight support shaft 27A and the short arm-length region SA of thefly weight 18A to thepawl 28. Accordingly, it is advantageous to increase the thickness of the short arm-length region SA as in the case of the present embodiment. On the other hand, in the long arm-length region LA, as the large force from thesheave 14 does not act, there is no problem to reduce the thickness to reduce the inertia mass. - Further, it is confirmed by the inventors' study that it is possible to sufficiently reduce the inertia mass as long as the diameter of the through
hole 35A of the inertiamass adjusting unit 33A is equal to or longer than about 13 mm. Note that the shape of the throughhole 35A has a round shape, however, even a polygonal shape or elliptic shape other than the round shape is applicable as the throughhole 35A. Further, there is no problem that it is not a through hole but e.g. a bottomed concave shape. - Further, it is advantageous that the inertia
mass adjusting unit 33A is formed at least on the end side from a portion where thepin 30A connecting the connectingmember 31 to the flyweight 18A is provided. With this configuration, an attachment surface of the connectingmember 31 is set at the same height in thefly weights pin 30A is provided in the thin inertiamass adjusting unit 33A in thefly weight 18A, as thefly weight 18B side is the thick short arm-length region SA, the connectingmember 31 is attached in an inclined status. This is disadvantageous attachment status in the mechanism. - Note that in the present embodiment, the inertia
mass adjusting unit 33A is formed with thethin part 34A and the throughhole 35A. It goes without saying that the inertiamass adjusting unit 33A may be formed with only one of thethin part 34A and the throughhole 35A. - As described above, in the present invention, with the weight support shaft which rotatably supports the fly weight for fly-away of the fly weight as a border, the pawl meshed with the ratchet teeth of the ratchet wheel is attached to one region side of the fly weight. Then the inertia mass adjusting unit having a shape to adjust the inertia mass of the fly weight to that equivalent to or smaller than the inertia mass of the ratchet wheel is provided on the other region side of the fly weight.
- In this manner, by adjusting the inertia mass of the fly weight to that equivalent to or smaller than the inertia mass of the ratchet wheel, it is possible to infallibly realize meshing between the ratchet teeth of the ratchet wheel and the pawl of the fly weight. With this configuration, it is possible to eliminate adverse effects such as delay of the operation of the emergency stop device.
- Note that the present invention is not limited to the above-described embodiment, but various modifications are included. For example, the above embodiment has been described in detail for explaining the present invention, and the invention is not necessarily limited to an embodiment having all the described constituent elements. Further, a part of constituent element of an embodiment may be replaced with those of another embodiment. Further, constituent elements of an embodiment may be added to those of another embodiment. Further, it is possible to perform addition/deletion/replacement with respect to a part of constituent elements of the respective embodiments with other constituent elements.
-
- 10:
- governor device,
- 11:
- base,
- 12:
- frame,
- 13:
- sheave shaft,
- 14:
- sheave,
- 15:
- governor rope,
- 16:
- ratchet wheel,
- 17:
- ratchet teeth,
- 18A, 18B:
- fly weight,
- 19:
- brake mechanism,
- 20:
- brake arm,
- 21:
- pin,
- 22:
- connecting rod,
- 23:
- brake spring,
- 24:
- brake shoe,
- 25:
- car stop switch,
- 26:
- support base,
- 27A, 27B:
- weight support shaft,
- 28:
- pawl,
- 29A, 29B:
- protruding part,
- 30A, 30B:
- pin,
- 31:
- connecting member,
- 32:
- spring member with adjustment function,
- 33A, 33B:
- inertia mass adjusting unit,
- 34A, 34B:
- thin part,
- 35A, 35B:
- through hole.
Claims (7)
- An elevator device having a governor device (10), comprising:a sheave (14), which a governor rope (15) is put around, and which is rotated by movement of the governor rope (15) in accordance with elevation of a car;a ratchet wheel (16) which is rotatably supported with a rotary shaft of the sheave (14) and which has a plurality of ratchet teeth (17) on an outer periphery;a fly weight which is provided on the outer periphery of the ratchet wheel (16) and which is rotated by a centrifugal force caused by rotation of the sheave (14);a pawl (28) which is attached to an end of the fly weight and which is disengageably meshed with the ratchet teeth (17) of the ratchet wheel (16); anda brake mechanism (19), which is connected to the ratchet wheel (16), and in which when the car descends at a speed beyond a rated speed, the pawl (28) of the fly weight is engaged with the ratchet teeth (17) of the ratchet wheel (16), to act a braking force on the governor rope (15),wherein the fly weight is rotatably supported with a weight support shaft (27A, 27B) integrally rotated with the sheave (14), characterized in thatwith the weight support shaft (27A, 27B) as a border, the pawl (28) meshed with the ratchet teeth (17) of the ratchet wheel (16) is attached to one region side of the fly weight, and an inertia mass adjusting unit (33A, 33B) having a shape to adjust inertia mass of the fly weight to that equivalent to or smaller than inertia mass of the ratchet wheel (16) is provided on other region side of the fly weight.
- The elevator device according to claim 1, wherein the inertia mass adjusting unit (33A, 33B) is formed with a thin part (34A, 34B) thinner than the thickness of the one region side of the fly weight, or a through hole (35A, 35B), or the thin part (34A, 34B) and the through hole (35A, 35B).
- The elevator device according to claim 2, wherein the thin part (34A, 34B) is formed to be equal to or thinner than about 2/3 of the thickness of the one region side of the fly weight.
- The elevator device according to claim 2, wherein the through hole (35A, 35B) is a round through hole having a diameter equal to or larger than 13 mm.
- The elevator device according to claim 1, wherein the fly weight is formed with a first fly weight (18A) and a second fly weight (18B) provided to be opposite to each other with the ratchet wheel (16) between them, and wherein the inertia mass adjusting unit (33A, 33B) is formed in both of the first fly weight (18A) and the second fly weight (18B).
- The elevator device according to claim 5, wherein the pawl (28) is attached only to the second fly weight (18B).
- The elevator device according to claim 5, wherein the first fly weight (18A) and the second fly weight (18B) are connected to each other with a connecting member (31), and wherein the connecting member (31) connects a pin (30A) provided in the one region of the first fly weight (18A) to a pin (30B) provided in the other region than the inertia mass adjusting unit (33B) in the second fly weight (18B).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2015/078870 WO2017064745A1 (en) | 2015-10-13 | 2015-10-13 | Elevator device |
Publications (3)
Publication Number | Publication Date |
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EP3363759A1 EP3363759A1 (en) | 2018-08-22 |
EP3363759A4 EP3363759A4 (en) | 2019-07-24 |
EP3363759B1 true EP3363759B1 (en) | 2020-05-06 |
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ID=58517973
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Application Number | Title | Priority Date | Filing Date |
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EP15906210.8A Active EP3363759B1 (en) | 2015-10-13 | 2015-10-13 | Elevator device |
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EP (1) | EP3363759B1 (en) |
JP (1) | JP6518336B2 (en) |
KR (1) | KR20180051605A (en) |
CN (1) | CN108137271B (en) |
WO (1) | WO2017064745A1 (en) |
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CN109720961B (en) | 2017-10-30 | 2021-08-17 | 奥的斯电梯公司 | Speed limiter assembly and elevator system |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5065845A (en) * | 1990-09-13 | 1991-11-19 | Pearson David B | Speed governor safety device for stopping an elevator car |
JP4312896B2 (en) * | 1999-09-10 | 2009-08-12 | 東芝エレベータ株式会社 | Elevator governor |
JP2002020056A (en) * | 2000-07-03 | 2002-01-23 | Toshiba Elevator Co Ltd | Speed governor for elevator |
JP4836437B2 (en) * | 2004-11-19 | 2011-12-14 | 東芝エレベータ株式会社 | Elevator governor. |
CN101088897A (en) * | 2007-07-10 | 2007-12-19 | 宁波申菱电梯配件有限公司 | Novel elevator speed limiter |
CN201211988Y (en) * | 2008-05-06 | 2009-03-25 | 河北东方富达机械有限公司 | Speed limiter of elevator |
WO2010084564A1 (en) * | 2009-01-20 | 2010-07-29 | 三菱電機株式会社 | Safety device for elevator |
ATE542767T1 (en) * | 2009-11-10 | 2012-02-15 | Thyssenkrupp Elevator Ag | TRIGGER DEVICE FOR A SPEED LIMITER OF AN ELEVATOR SYSTEM |
EP2602222A1 (en) * | 2010-08-06 | 2013-06-12 | Mitsubishi Electric Corporation | Elevator speed governor |
-
2015
- 2015-10-13 WO PCT/JP2015/078870 patent/WO2017064745A1/en active Application Filing
- 2015-10-13 KR KR1020187010100A patent/KR20180051605A/en not_active Application Discontinuation
- 2015-10-13 JP JP2017545013A patent/JP6518336B2/en active Active
- 2015-10-13 CN CN201580083717.XA patent/CN108137271B/en active Active
- 2015-10-13 EP EP15906210.8A patent/EP3363759B1/en active Active
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CN108137271B (en) | 2019-11-19 |
WO2017064745A1 (en) | 2017-04-20 |
EP3363759A4 (en) | 2019-07-24 |
JP6518336B2 (en) | 2019-05-22 |
CN108137271A (en) | 2018-06-08 |
JPWO2017064745A1 (en) | 2018-07-26 |
EP3363759A1 (en) | 2018-08-22 |
KR20180051605A (en) | 2018-05-16 |
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