CN112105576A - Elevator speed limiter and elevator device - Google Patents
Elevator speed limiter and elevator device Download PDFInfo
- Publication number
- CN112105576A CN112105576A CN201880093416.9A CN201880093416A CN112105576A CN 112105576 A CN112105576 A CN 112105576A CN 201880093416 A CN201880093416 A CN 201880093416A CN 112105576 A CN112105576 A CN 112105576A
- Authority
- CN
- China
- Prior art keywords
- ratchet
- governor
- pawl
- sheave
- elevator
- 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.)
- Granted
Links
Images
Classifications
-
- 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
Abstract
In an elevator governor, a governor sheave rotates in a 1 st direction in accordance with the rising of an elevating body. The pawl holding mechanism holds the state in which the pawl bites the ratchet when the governor sheave rotates in the 1 st direction from the state in which the governor sheave is stopped by the rope catching mechanism. The rope catching mechanism is connected to the ratchet via a connecting pin. The ratchet wheel is provided with a connecting pin hole. The connecting pin hole is an arc-shaped long hole. The state of holding the pawl by the pawl holding mechanism is released by rotating the speed governor sheave in the 1 st direction in a state where the ratchet is stopped.
Description
Technical Field
The present invention relates to an elevator governor that operates an emergency stop device to emergency-stop a lifting body when a descending speed of the lifting body reaches an emergency stop operation speed, and an elevator apparatus using the elevator governor.
Background
In a conventional elevator without a machine room, the speed governor is automatically returned to a normal state by raising the car from a state in which the emergency stop device is operated. In order to have such a function, a conventional governor has a structure in which a claw and a flyweight are integrated (see, for example, patent document 1) or a structure in which a flyweight opens a claw (see, for example, patent document 2).
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open No. 2001-106454
Patent document 2: japanese laid-open patent publication No. 2010-228879
Disclosure of Invention
Problems to be solved by the invention
Some conventional elevator apparatus testing methods are to check the stability of an emergency stop apparatus without operating a hoisting machine brake. In this test method, the lowering speed of the car is increased to the emergency stop operation speed without operating the hoisting machine brake. Then, it is confirmed whether or not the emergency stop device can actually operate to stop the car.
In the above test method, when the car stops, the counterweight connected to the car via the main rope jumps due to the inertial force. In this case, the counterweight is free to fall after jumping. Then, at a stage after the main ropes are fully extended, an upward force is applied to the car.
As a result, the car slightly ascends, and the gripping force of the emergency stop device on the car guide rail is released. In addition, the conventional governor described above automatically returns to the normal state when the car ascends. Therefore, when the car starts to descend again and the descending speed reaches the emergency stop operation speed again, the emergency stop device operates. When such an operation is repeated, it is difficult to confirm whether or not the emergency stop device is normal.
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an elevator governor and an elevator apparatus using the same, in which: after the emergency stop device is actuated, the elevator governor can be prevented from being unnecessarily returned to a normal state.
Means for solving the problems
An elevator speed governor of the present invention includes: a frame body; a governor sheave that is provided in the housing so as to be rotatable about the main shaft, rotates in a 1 st direction in accordance with the ascending of the ascending/descending body, and rotates in a 2 nd direction in accordance with the descending of the ascending/descending body; a ratchet wheel which is provided in the housing so as to be rotatable about the main shaft within a predetermined angle range; a pawl provided on the governor sheave, the pawl engaging with the ratchet when the lowering speed of the lifting body reaches the emergency stop operating speed, thereby rotating the ratchet from the normal position to the operating position; a rope catching mechanism which is provided in the housing, is coupled to the ratchet via a coupling pin, and which, when the ratchet rotates from a normal position to an operating position, sandwiches the governor rope between the rope catching mechanism and the governor sheave and stops the rotation of the governor sheave; and a pawl holding mechanism that holds a state in which the pawl bites the ratchet when the governor sheave rotates in the 1 st direction from a state in which the governor sheave is stopped by the rope catching mechanism, wherein the ratchet is provided with a coupling pin hole into which the coupling pin is inserted, the coupling pin hole is an arc-shaped long hole, the arc-shaped long hole retreats the coupling pin and allows the ratchet to rotate in the 1 st direction when the governor sheave rotates in the 1 st direction from the state in which the governor sheave is stopped by the rope catching mechanism, and the state in which the pawl is held by the pawl holding mechanism is released by rotating the governor sheave in the 1 st direction with the ratchet stopped.
Effects of the invention
According to the elevator governor and the elevator apparatus of the present invention, after the emergency stop device is operated, the elevator governor can be prevented from being unnecessarily returned to the normal state.
Drawings
Fig. 1 is a configuration diagram showing an elevator apparatus according to embodiment 1 of the present invention.
Fig. 2 is a front view showing an enlarged main part of the elevator governor of fig. 1.
Fig. 3 is a front view showing a state in which the pawl of fig. 2 bites into the ratchet.
Fig. 4 is a front view showing a state in the middle of rotation of the ratchet wheel of fig. 3 in the 2 nd direction.
Fig. 5 is a front view showing a state in which the ratchet of fig. 4 is rotated to an action position.
Fig. 6 is a front view showing a state in which the governor sheave of fig. 5 is rotated in the 1 st direction.
Fig. 7 is an enlarged front view showing a main part of an elevator governor according to embodiment 2 of the present invention.
Fig. 8 is a front view showing a latch mechanism of embodiment 2.
Fig. 9 is a front view showing a locked state of the latch mechanism of fig. 8 to the pawl.
Fig. 10 is a front view showing a state in which the pawl of fig. 7 bites into the ratchet.
Fig. 11 is a front view showing a state in which the ratchet of fig. 10 is rotated to an operating position.
Fig. 12 is a front view showing a state in which the governor sheave of fig. 11 is rotated in the 1 st direction.
Fig. 13 is a front view showing a modification of the latch mechanism of embodiment 2.
Fig. 14 is a front view showing a locked state of the latch mechanism of fig. 13 to the pawl.
Detailed Description
The following describes a mode for carrying out the present invention with reference to the drawings.
Fig. 1 is a configuration diagram showing an elevator apparatus according to embodiment 1 of the present invention, and shows a machine room-less elevator. In fig. 1, a hoisting machine 2 is provided in an upper portion in a hoistway 1. The hoisting machine 2 includes a drive sheave 3, a hoisting machine motor (not shown), and a hoisting machine brake 4.
The hoisting machine motor rotates the drive sheave 3. The hoisting machine brake 4 holds the drive sheave 3 in a stationary state or brakes the rotation of the drive sheave 3.
A suspension body 5 is wound around the drive sheave 3. As the suspension body 5, a plurality of ropes or a plurality of belts are used.
A car 6 as a 1 st vertically movable body is suspended in the hoistway 1 by a suspension body 5 on one side of the drive sheave 3. A counterweight 7 as a second vertically movable body 2 is suspended in the hoistway 1 by a suspension body 5 on the other side of the drive sheave 3. By rotating the drive sheave 3, the car 6 and the counterweight 7 are raised and lowered in the hoistway 1.
A pair of car guide rails 8 and a pair of counterweight guide rails 9 are provided in the hoistway 1. In fig. 1, only one car guide rail 8 and one counterweight guide rail 9 are shown.
The pair of car guide rails 8 guide the up-and-down movement of the car 6. A pair of counterweight guide rails 9 guide the raising and lowering of the counterweight 7.
An emergency stop device 10 is mounted on a lower portion of the car 6. The safety device 10 holds the pair of car guide rails 8 to bring the car 6 to a safety stop. The emergency stop device 10 is provided with an operating lever 11. The safety device 10 is operated by pulling up the operating lever 11 with respect to the safety device 10.
An elevator governor 12 is provided in an upper portion in the hoistway 1. Elevator governor 12 monitors whether car 6 is traveling at an excessive speed. Further, the elevator governor 12 has a governor sheave 13.
A speed limiter rope 14 is wound around the speed limiter sheave 13. The governor rope 14 is laid in a loop shape in the hoistway 1 and connected to the operating rod 11.
A tension pulley 15 is provided at a lower portion of the hoistway 1. The lower end of the governor rope 14 is wound around the tension sheave 15. When the car 6 moves up and down, the governor rope 14 circulates and the governor sheave 13 rotates at a rotation speed corresponding to the traveling speed of the car 6.
In the elevator governor 12, it is mechanically detected whether the traveling speed of the car 6 has reached an excessive speed. The excessive speeds detected by elevator governor 12 include 1 st excessive speed Vos and 2 nd excessive speed Vtr. The 1 st excessive speed Vos is set higher than the rated speed Vr. The 2 nd excessive speed Vtr is set higher than the 1 st excessive speed.
When the traveling speed of the car 6 reaches the 1 st excessive speed Vos, the power supply to the hoisting machine 2 is cut off by the elevator governor 12, and the hoisting machine brake 4 operates. Thereby, the rotation of the drive sheave 3 is braked, and the car 6 is stopped in an emergency.
When the descending speed of the car 6 reaches the 2 nd excessive speed Vtr, the circulation of the governor rope 14 is stopped by the elevator governor 12. As a result, the operating lever 11 is operated to operate the safety device 10, thereby stopping the car 6 in an emergency. That is, the 2 nd excessive speed Vtr is the emergency stop operation speed.
Fig. 2 is a front view showing an enlarged main part of elevator governor 12 of fig. 1, showing a normal state of elevator governor 12. The elevator governor 12 includes a frame 21, a ratchet 22, a 1 st flyweight 23, a 2 nd flyweight 24, a detection switch 25, a claw 26, a stopper pin 27, a rope catching mechanism 28, and a ratchet return spring 29 in addition to the governor sheave 13.
The governor sheave 13 is provided in the housing 21. The governor sheave 13 is rotatable about a horizontal main shaft 13 a. The governor sheave 13 rotates in the 1 st direction d1, i.e., in the clockwise direction in fig. 2, as the car 6 ascends. The governor sheave 13 rotates in the 2 nd direction d2, i.e., counterclockwise in fig. 2, as the car 6 descends.
The ratchet 22 is provided in the frame 21. Further, the ratchet 22 can rotate about the main shaft 13a within a set angle range.
The 1 st and 2 nd flyweights 23 and 24 are provided on the governor sheave 13. The 1 st and 2 nd flyweights 23 and 24 are arranged symmetrically about the main shaft 13 a.
The flyweights 23 and 24 are rotatable about a rotation axis parallel to the main shaft 13a with respect to the governor sheave 13. The rotation angle of each flyweight 23, 24 changes in accordance with the rotation speed of the governor sheave 13.
The detection switch 25 is provided in the housing 21. When the traveling speed of the car 6 reaches the 1 st excessive speed Vos, the detection switch 25 is operated by either one of the 1 st and 2 nd flyweights 23 and 24. This cuts off the power supply to the hoisting machine 2.
The claw 26 is provided on the governor sheave 13 so as to be rotatable about the rotation shaft of the 1 st flyweight 23. In the normal state, the pawl 26 is held at a position spaced apart from the ratchet 22 by a pawl return spring (not shown).
When the descending speed of the car 6 reaches the 2 nd excessive speed Vtr, the claw 26 is pressed by the 1 st flyweight 23, rotated against the claw return spring, and bites into the teeth on the outer periphery of the ratchet 22. In this state, the pawl 26 rotates the ratchet 22 from the normal position to the operating position.
The ratchet 22 is provided with a stopper pin hole 22 a. The stopper pin hole 22a is an arc-shaped elongated hole centered on the main shaft 13 a.
The stopper pin 27 is fixed to the frame 21. The stopper pin 27 is inserted into the stopper pin hole 22 a. Thereby, the stopper pin 27 restricts the rotation angle of the ratchet 22 relative to the frame 21.
When the ratchet 22 is in the normal position, the stopper pin 27 is located at the end of the stopper pin hole 22a in the 2 nd direction d 2.
The rope catching mechanism 28 is provided in the housing 21. Further, the rope catching mechanism 28 has an arm 31, a shoe 32, a tension rod 33, a bolt 34, a spring bracket 35, a pair of nuts 36, and a compression spring 37.
The arm 31 is provided on the housing 21 so as to be rotatable about a rotation axis parallel to the main shaft 13 a. The shoe 32 is provided on the arm 31 so as to be rotatable about a rotation axis parallel to the main shaft 13 a. The shoe 32 faces the outer peripheral surface of the governor sheave 13.
The 1 st end of the bolt 34 in the axial direction penetrates the arm 31 and is coupled to the base end of the tension rod 33. The distal end portion of the pull rod 33 is coupled to the ratchet 22 via a coupling pin 38.
The axial 2 nd end of the bolt 34 penetrates the spring holder 35. The nut 36 is mounted to the 2 nd end of the bolt 34 to prevent the spring holder 35 from coming off the bolt 34.
A compression spring 37 is provided between the arm 31 and the spring holder 35. As the pressure spring 37, for example, a coil spring is used. The bolt 34 penetrates the compression spring 37.
The ratchet 22 rotates from the normal position to the operating position, whereby the rope catching mechanism 28 sandwiches the governor rope 14 between the shoe 32 and the governor sheave 13. When the ratchet 22 rotates and the stopper pin 27 comes into contact with the end of the stopper pin hole 22a in the 1 st direction d1, the rotation of the ratchet 22 is stopped, and the rotation of the governor sheave 13 is stopped by the claw 26.
The ratchet 22 is provided with a coupling pin hole 22 b. The coupling pin hole 22b is an arc-shaped long hole centered on the main shaft 13 a. The coupling pin hole 22b is disposed at a position different from the stopper pin hole 22a in the circumferential direction of the ratchet 22. In this example, the coupling pin hole 22b is disposed on the opposite side of the stopper pin hole 22a with respect to the main shaft 13 a.
The coupling pin 38 is inserted into the coupling pin hole 22 b. When the ratchet 22 is in the normal position, the connecting pin 38 is located at the end of the connecting pin hole 22b in the 2 nd direction d 2.
When the governor sheave 13 rotates in the 1 st direction d1 from a state in which it is stopped by the operation of the rope catching mechanism 28, the coupling pin hole 22b avoids the coupling pin 38 and allows the ratchet 22 to rotate in the 1 st direction.
The ratchet return spring 29 is provided between the frame 21 and the ratchet 22. Further, the ratchet return spring 29 applies a force to rotate the ratchet 22 in the 1 st direction d 1. Thereby, the ratchet return spring 29 holds the ratchet 22 in the normal position.
Further, when the governor sheave 13 rotates in the 1 st direction d1 from the state of being stopped by the operation of the rope catching mechanism 28, the ratchet return spring 29 holds the state where the pawl 26 bites into the ratchet 22. That is, the ratchet return spring 29 of embodiment 1 also serves as the pawl holding mechanism.
Next, the operation will be described. When the descending speed of the car 6 reaches the 2 nd excessive speed Vtr, the claw 26 is pressed and rotated by the 1 st flyweight 23 which is opened outward by the centrifugal force. The pawl 26 then bites into the teeth of the ratchet wheel 22 as shown in fig. 3. In fig. 3 to 6, the ratchet return spring 29 is not shown.
When the governor sheave 13 further rotates in the 2 nd direction d2 from the state of fig. 3, the rotation of the governor sheave 13 is transmitted to the ratchet 22 via the claw 26. Thereby, the ratchet 22 rotates in the 2 nd direction d2 against the ratchet return spring 29.
Fig. 4 is a front view showing a state in which the ratchet 22 of fig. 3 is rotated halfway in the 2 nd direction d 2. In the state of fig. 4, the coupling pin 38 moves relatively in the coupling pin hole 22 b. Therefore, the rope catching mechanism 28 does not operate, and the governor rope 14 is not gripped by the shoe 32.
Then, the coupling pin 38 reaches the end of the coupling pin hole 22b in the 1 st direction d 1. In this state, when the ratchet 22 further rotates in the 2 nd direction d2, the arm 31 is pulled toward the governor sheave 13 via the pull rod 33.
Thereby, as shown in fig. 5, the shoe 32 moves toward the governor sheave 13, and the governor rope 14 is gripped. That is, fig. 5 shows the operating state of the elevator governor 12. At this time, the spring force of the compression spring 37 becomes the pressing force of the shoe 32. Furthermore, the ratchet 22 is in the actuated position.
Further, when the ratchet 22 is located at the operating position, the stopper pin 27 is located at the end of the stopper pin hole 22a in the 1 st direction d 1. Thereby, the ratchet 22 is prevented from rotating in the 2 nd direction d2 from the operating position.
When the car 6 descends in a state where the governor rope 14 is gripped, the operating lever 11 is pulled up with respect to the safety device 10, and the safety device 10 operates. Thereby, the car 6 is stopped in an emergency.
Here, when a test is performed in which the safety device 10 is operated without operating the hoisting machine brake 4, the counterweight 7 jumps up due to the inertial force when the car 6 is stopped suddenly. In this case, the counterweight 7 falls freely after jumping up. Then, at a stage after the suspension 5 is completely extended, an upward force acts on the car 6.
As a result, the car 6 slightly ascends, and the governor sheave 13 slightly rotates in the 1 st direction. Further, the gripping force of the safety device 10 on the car guide rail 8 is released.
Fig. 6 is a front view showing a state in which the governor sheave 13 of fig. 5 is slightly rotated in the 1 st direction d 1. When the governor sheave 13 rotates in the 1 st direction d1 from the state of fig. 5, the force that pulls the tension lever 33 is released, the tension lever 33 returns to the initial position, and the state of gripping the governor rope 14 is released.
When the governor sheave 13 rotates in the 1 st direction d1, the pawl 26 is separated from the teeth of the ratchet 22. However, the ratchet 22 is urged to rotate in the 1 st direction d1 by the ratchet return spring 29. Therefore, the ratchet 22 follows the governor sheave 13 and rotates in the 1 st direction d 1. Thereby, the state in which the pawl 26 bites into the ratchet 22 is maintained.
Therefore, when the car 6 descends again from the state of fig. 6 and the governor sheave 13 rotates in the 2 nd direction d2, the governor rope 14 is immediately gripped by the shoe 32 before the speed of the car 6 reaches the 2 nd excessive speed Vtr.
Thereby, the safety device 10 grips the car guide rail 8 again. At this time, the energy required to stop the car 6 is small, and therefore the counterweight 7 does not jump up again. Therefore, whether or not the emergency stop device 10 is normal can be confirmed more reliably.
Further, from the state of fig. 5, when the car 6 is raised and the ratchet 22 returns from the operating position to the normal position, the ratchet 22 is stopped and only the governor sheave 13 rotates in the 1 st direction d 1. Therefore, the state in which pawl 26 bites into ratchet 22 is released, and elevator governor 12 returns to the state of fig. 2.
That is, the state in which the pawl 26 is held by the ratchet return spring 29 is released by rotating the governor sheave 13 in the 1 st direction d1 with the ratchet 22 stopped.
According to elevator speed governor 12 of this type, unnecessary return of elevator speed governor 12 to the normal state can be suppressed after emergency stop device 10 is operated.
Further, by raising the car 6, the elevator governor 12 can be easily returned to the normal state.
Further, the ratchet return spring 29 doubles as the pawl holding mechanism, and therefore, the increase in the number of components can be suppressed, and the structure can be simplified.
Embodiment mode 2
Next, fig. 7 is an enlarged front view showing a main part of an elevator speed governor 12 according to embodiment 2 of the present invention, and shows a normal state of the elevator speed governor 12. In embodiment 2, when the ratchet 22 is at the normal position, the connecting pin 38 is located at the end of the connecting pin hole 22b in the 1 st direction d 1.
Further, when the ratchet 22 is in the normal position, the stopper pin 27 is located at an intermediate portion of the stopper pin hole 22 a.
A ratchet return spring 39 is provided between the frame 21 and the ratchet 22. The ratchet return spring 39 applies a force to the ratchet 22 to rotate in the 2 nd direction d 2. Thereby, the ratchet return spring 39 holds the ratchet 22 in the normal position.
Although not shown in fig. 7, as shown in fig. 8, a latch mechanism 41 as a pawl holding mechanism is provided between the governor sheave 13 and the pawl 26. When the pawl 26 is rotated to a position to bite into the ratchet 22, as shown in fig. 9, the latch mechanism 41 mechanically holds the pawl 26.
The latch mechanism 41 has a pawl-side latch 42 and a sheave-side latch 43. The pawl-side latch 42 is provided to the pawl 26. The sheave side latching portion 43 is provided to the governor sheave 13. The claw-side latch 42 overlaps the sheave-side latch 43, and the claw-side latch 42 and the sheave-side latch 43 are thereby connected.
The ratchet 22 also rotates in the 1 st direction d1 integrally with the governor sheave 13 in a state where the pawl-side latch 42 and the sheave-side latch 43 are coupled. However, the ratchet 22 can only be rotated in the 1 st direction d1 to a state where the coupling pin 38 is located at the end of the coupling pin hole 22b in the 2 nd direction d 2.
Therefore, when the governor sheave 13 is rotated in the 1 st direction d1 from the state where the connecting pin 38 is located at the end of the connecting pin hole 22b in the 2 nd direction d2, the ratchet 22 is stopped and only the governor sheave 13 is rotated.
At this time, the tip of the pawl 26 is pressed outward by the teeth of the ratchet 22 with a force greater than the coupling force of the pawl-side latch 42 and the sheave-side latch 43. Thereby, the latch mechanism 41 releases the holding state of the pawl 26, and the pawl 26 rotates clockwise in fig. 9. The other structure is the same as embodiment 1.
Next, the operation will be described. When the descending speed of the car 6 reaches the 2 nd excessive speed Vtr, the claw 26 is pressed and rotated by the 1 st flyweight 23 which is opened outward by the centrifugal force. The pawl 26 then bites into the teeth of the ratchet wheel 22 as shown in fig. 10. At this time, the rotation of the pawl 26 is locked by the latch mechanism 41. In fig. 10 to 12, the ratchet return spring 39 and the latch mechanism 41 are not shown.
When the governor sheave 13 further rotates in the 2 nd direction d2 from the state of fig. 10, the rotation of the governor sheave 13 is transmitted to the ratchet 22 via the claw 26. Then, the ratchet 22 rotates in the 2 nd direction d2, and the arm 31 is pulled toward the governor sheave 13 via the lever 33.
As a result, as shown in fig. 11, the shoe 32 moves toward the governor sheave 13, and the governor rope 14 is gripped. That is, fig. 11 shows an operating state of the elevator governor 12. At this time, the spring force of the compression spring 37 becomes the pressing force of the shoe 32. Furthermore, the ratchet 22 is in the actuated position.
Further, when the ratchet 22 is located at the operating position, the stopper pin 27 is located at the end of the stopper pin hole 22a in the 1 st direction d 1. Thereby, the ratchet 22 is prevented from rotating in the 2 nd direction d2 from the operating position.
When the car 6 descends in a state where the governor rope 14 is gripped, the operating lever 11 is pulled up with respect to the safety device 10, and the safety device 10 operates. Thereby, the car 6 is stopped in an emergency.
In addition, as described above, in the test for operating the safety device 10, after the car 6 is brought to an emergency stop, the car 6 slightly ascends due to the influence of the jump-up of the counterweight 7, and the governor sheave 13 slightly rotates in the 1 st direction d 1.
Fig. 12 is a front view showing a state in which the governor sheave 13 of fig. 11 is slightly rotated in the 1 st direction d 1. When the governor sheave 13 rotates in the 1 st direction d1 from the state of fig. 11, the force that pulls the tension lever 33 is released, the tension lever 33 returns to the initial position, and the state of gripping the governor rope 14 is released.
When the governor sheave 13 rotates in the 1 st direction d1, the pawl 26 is separated from the teeth of the ratchet 22. However, since the pawl 26 is held by the latch mechanism 41, the ratchet 22 also rotates in the 1 st direction d1 in a state where the pawl 26 bites into the ratchet 22.
Therefore, when the car 6 descends again from the state of fig. 12 and the governor sheave 13 rotates in the 2 nd direction d2, the governor rope 14 is immediately gripped by the shoe 32 before the speed of the car 6 reaches the 2 nd excessive speed Vtr.
Thereby, the safety device 10 grips the car guide rail 8 again. At this time, the energy required to stop the car 6 is small, and therefore the counterweight 7 does not jump up again. Therefore, whether or not the emergency stop device 10 is normal can be confirmed more reliably.
When the car 6 is raised from the state shown in fig. 11, the ratchet 22 rotates in the 1 st direction d1 together with the governor sheave 13. However, when the link pin 38 reaches the end of the link pin hole 22b in the 2 nd direction d2, the rotation of the ratchet 22 in the 1 st direction d1 is stopped.
When the governor sheave 13 rotates in the 1 st direction d1, the latch mechanism 41 releases the holding state of the pawl 26, and the pawl 26 moves away from the ratchet 22. The ratchet 22 rotates in the 2 nd direction d2 by the spring force of the ratchet return spring 39, and returns to the normal position. Thereby, elevator governor 12 returns to the state of fig. 7.
That is, the state of holding the pawl 26 by the latch mechanism 41 is released by rotating the governor sheave 13 in the 1 st direction d1 with the ratchet 22 stopped.
According to elevator speed governor 12 of this type, unnecessary return of elevator speed governor 12 to the normal state can be suppressed after emergency stop device 10 is operated.
Further, by raising the car 6, the elevator governor 12 can be easily returned to the normal state.
Further, since the latch mechanism 41 mechanically holds the state in which the pawl 26 bites into the ratchet 22, it is possible to more reliably suppress unnecessary return of the elevator governor 12 to the normal state after the emergency stop device 10 is operated.
The claw holding mechanism according to embodiment 2 is not limited to the latch mechanism 41 shown in fig. 8 and 9.
For example, as shown in fig. 13 and 14, a latch mechanism 44 may be provided between the pawl 26 and the ratchet 22. The latch mechanism 44 has a pawl-side latch 45 and a plurality of ratchet-side latches 46. The claw-side latch 45 is provided to the claw 26. The ratchet side latch 46 is provided to all the teeth of the ratchet 22.
When the pawl 26 bites into the ratchet 22, the pawl-side latch portion 45 overlaps with the ratchet-side latch portion 46, and the pawl-side latch portion 45 and the ratchet-side latch portion 46 are coupled.
Further, the pawl holding mechanism may also be held in a position in which the pawl bites into the ratchet by magnetic force.
In the above example, the elevator governor 12 is shown which operates the safety device 10 mounted on the car 6. However, the present invention can also be applied to an elevator governor that operates an emergency stop device mounted on the counterweight 7.
The layout of the entire elevator apparatus is not limited to the layout of fig. 1. For example, in the following 2: the present invention can also be applied to an elevator apparatus of 1-wrap-type.
Further, the present invention can be applied to various types of elevators. For example, the present invention can be applied to a double-deck elevator or a single-shaft multi-car elevator. The single-shaft multi-car system is a system in which an upper car and a lower car disposed directly below the upper car are raised and lowered independently in a common shaft.
Description of the reference symbols
2: a traction machine; 3: a drive sheave; 5: a suspension body; 6: a cage (1 st elevating body); 7: a counterweight (2 nd elevating body); 10: an emergency stop device; 12: an elevator governor; 13: a governor sheave; 13 a: a main shaft; 14: a governor rope; 21: a frame body; 22: a ratchet wheel; 22 b: a connecting pin hole; 26: a claw; 28: a rope catching mechanism; 29: a ratchet return spring (pawl holding mechanism); 38: a connecting pin; 39: a ratchet return spring; 41. 44: a latch mechanism (claw holding mechanism).
Claims (5)
1. An elevator governor having:
a frame body;
a governor sheave that is provided on the housing so as to be rotatable about a main shaft, rotates in a 1 st direction in accordance with an ascending/descending body, and rotates in a 2 nd direction in accordance with a descending/descending body;
a ratchet wheel provided to the housing so as to be rotatable about the main shaft within a predetermined angular range;
a pawl provided on the governor sheave, the pawl engaging with the ratchet when a lowering speed of the lifting/lowering body reaches an emergency stop operation speed, and thereby rotating the ratchet from a normal position to an operation position;
a rope catching mechanism that is provided in the housing, is coupled to the ratchet via a coupling pin, and that, when the ratchet rotates from the normal position to the operating position, sandwiches the governor rope between the rope catching mechanism and the governor sheave to stop rotation of the governor sheave; and
a pawl holding mechanism that holds a state in which the pawl bites into the ratchet when the governor sheave rotates in the 1 st direction from a state in which the governor sheave is stopped by the rope catching mechanism,
the ratchet wheel is provided with a connecting pin hole into which the connecting pin is inserted,
the coupling pin hole is an arc-shaped long hole that receives the coupling pin and allows the ratchet wheel to rotate in the 1 st direction when the governor sheave rotates in the 1 st direction from a state in which the governor sheave is stopped by the rope catching mechanism,
the state of holding the pawl by the pawl holding mechanism is released by rotating the governor sheave in the 1 st direction while the ratchet is stopped.
2. The elevator governor of claim 1,
the joint pin is located at the 2 nd-direction end of the joint pin hole when the ratchet wheel is located at the normal position,
a ratchet return spring that applies a force to the ratchet to rotate in the 1 st direction and holds the ratchet at the normal position is provided between the frame and the ratchet,
the ratchet return spring doubles as the pawl holding mechanism.
3. The elevator governor of claim 1,
the joint pin is located at the 1 st direction end of the joint pin hole when the ratchet wheel is located at the normal position,
a ratchet return spring is provided between the frame and the ratchet, and the ratchet return spring applies a force to rotate in the 2 nd direction to the ratchet to hold the ratchet at the normal position.
4. The elevator governor of claim 3,
the pawl holding mechanism is a latch mechanism that mechanically holds the pawl.
5. An elevator apparatus, comprising:
a traction machine having a drive sheave;
a suspension body wound around the drive sheave;
a 1 st elevating body suspended by the suspension body on one side of the drive sheave;
a 2 nd elevating body suspended by the suspension body on the other side of the drive sheave;
an emergency stop device mounted on the 1 st vertically movable body; and
the elevator governor according to any one of claims 1 to 4, wherein the emergency stop device is operated when a lowering speed of the 1 st elevating body reaches an emergency stop operation speed.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2018/019521 WO2019224881A1 (en) | 2018-05-21 | 2018-05-21 | Elevator governor and elevator device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112105576A true CN112105576A (en) | 2020-12-18 |
| CN112105576B CN112105576B (en) | 2021-09-24 |
Family
ID=68616651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880093416.9A Active CN112105576B (en) | 2018-05-21 | 2018-05-21 | Elevator speed limiter and elevator device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6890722B2 (en) |
| CN (1) | CN112105576B (en) |
| WO (1) | WO2019224881A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2262366A (en) * | 1939-07-25 | 1941-11-11 | Westinghouse Elec Elevator Co | Governor for elevator safety devices |
| JP2002020056A (en) * | 2000-07-03 | 2002-01-23 | Toshiba Elevator Co Ltd | Speed governor for elevator |
| CN102387977A (en) * | 2009-04-09 | 2012-03-21 | 三菱电机株式会社 | Elevator governor |
| CN104159840A (en) * | 2012-03-06 | 2014-11-19 | 三菱电机株式会社 | Elevator governor and elevator device |
| CN205973344U (en) * | 2015-12-25 | 2017-02-22 | 东芝电梯株式会社 | Safety device , overspeed governor and elevator |
| CN106922142A (en) * | 2014-11-19 | 2017-07-04 | 三菱电机株式会社 | Lift appliance |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4868807B2 (en) * | 2005-09-21 | 2012-02-01 | 東芝エレベータ株式会社 | Elevator governor |
| WO2010084564A1 (en) * | 2009-01-20 | 2010-07-29 | 三菱電機株式会社 | Safety device for elevator |
-
2018
- 2018-05-21 WO PCT/JP2018/019521 patent/WO2019224881A1/en active Application Filing
- 2018-05-21 JP JP2020520878A patent/JP6890722B2/en active Active
- 2018-05-21 CN CN201880093416.9A patent/CN112105576B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2262366A (en) * | 1939-07-25 | 1941-11-11 | Westinghouse Elec Elevator Co | Governor for elevator safety devices |
| JP2002020056A (en) * | 2000-07-03 | 2002-01-23 | Toshiba Elevator Co Ltd | Speed governor for elevator |
| CN102387977A (en) * | 2009-04-09 | 2012-03-21 | 三菱电机株式会社 | Elevator governor |
| CN104159840A (en) * | 2012-03-06 | 2014-11-19 | 三菱电机株式会社 | Elevator governor and elevator device |
| CN106922142A (en) * | 2014-11-19 | 2017-07-04 | 三菱电机株式会社 | Lift appliance |
| CN205973344U (en) * | 2015-12-25 | 2017-02-22 | 东芝电梯株式会社 | Safety device , overspeed governor and elevator |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6890722B2 (en) | 2021-06-18 |
| CN112105576B (en) | 2021-09-24 |
| JPWO2019224881A1 (en) | 2020-12-10 |
| WO2019224881A1 (en) | 2019-11-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4745332B2 (en) | Elevator governor | |
| CN109562910B (en) | Elevator device | |
| US8181749B2 (en) | Speed governor for an elevator | |
| US9505587B2 (en) | Elevator with acceleration detection | |
| EP2261161B1 (en) | Elevator device and method of testing the same | |
| JP2012246116A (en) | Elevator device, and emergency stop test method thereof | |
| JP6296973B2 (en) | Speed governor and elevator device | |
| JP5073483B2 (en) | Elevator safety device | |
| US1864588A (en) | Automatic reset safety device | |
| CN112105576B (en) | Elevator speed limiter and elevator device | |
| WO2004063074A1 (en) | Governor for elevator, and elevator equipment | |
| JPWO2006022015A1 (en) | Elevator equipment | |
| JP2002255466A (en) | Emergency stopper for car for elevator | |
| JP6678814B2 (en) | Elevator equipment | |
| JP6610914B2 (en) | Inspection method for elevator safety device | |
| CN113844978B (en) | Safety joint with pulley | |
| KR100857644B1 (en) | Governor for elevator | |
| CN113498399B (en) | Triggering system for safety gear, elevator installation and method for operating an elevator installation | |
| KR101239403B1 (en) | double type safety device for elevator | |
| JPH05319731A (en) | Braking device for linear motor drive elevator | |
| RU2026253C1 (en) | Lift | |
| US287959A (en) | Safety elevatoe | |
| JP2012091938A (en) | Safety device of elevator | |
| KR101287619B1 (en) | safety device for elevator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |