JP7520262B2 - Elevator emergency stop device - Google Patents

Description

This disclosure relates to an elevator emergency stop operating device.

In conventional elevator stopping devices, when a detector detects that a moving body is falling at an excessive speed, an actuator is driven and a pair of small wedge pieces are pulled up. This prevents the pair of small wedge pieces from moving against the rail. If the moving body falls further from this state, the pair of wedge pieces are pulled up via a pair of connecting parts, and the moving body is stopped (see, for example, Patent Document 1).

JP 2013-60291 A

In conventional elevator stopping devices such as those described above, it was necessary to increase the actuator capacity in order to restore the stopping device after stopping the lifting body.

This disclosure has been made to solve the problems described above, and aims to provide an elevator emergency stop operating device that can reduce the capacity of the actuator.

The elevator emergency stop operating device according to the present disclosure comprises a first movable member provided on a lifting body that rises and falls along a guide rail and displaceable between a first normal position and a first operating position, a first eccentric roller provided on the first movable member so as to be rotatable in a first forward direction and a first reverse direction about a first roller axis and which, when in contact with the guide rail, rotates while in contact with the guide rail as the lifting body rises and falls, a lifting rod connected to the first eccentric roller and is pulled up as the first eccentric roller rotates in the first forward direction while in contact with the guide rail, thereby operating the emergency stop device, an operating spring device that applies a force to the first movable member to displace it to the first operating position, and a spring for the emergency stop device The actuator holds the first movable member in a first normal position against the operating spring device when not in operation, and releases the first movable member from the first normal position in response to an operation command signal that activates the emergency stop device, and the first roller shaft is positioned at a position offset from the center of the first eccentric roller.When the actuator releases the hold of the first movable member in response to the operation command signal, the operating spring device displaces the first movable member from the first normal position to the first operating position, causing the first eccentric roller to contact the guide rail, and the lifting rod is pulled up by the rotation of the first eccentric roller in the first forward direction due to the descent of the lifting body, and the first movable member is returned to the first normal position against the operating spring device.

According to the elevator emergency stop operating device disclosed herein, the actuator capacity can be reduced.

1 is a configuration diagram showing an elevator according to a first embodiment. FIG. FIG. 2 is a front view showing a schematic configuration of the safety device shown in FIG. 1 . FIG. 3 is a front view showing the first gripping portion of FIG. 2 . 11 is a front view showing the first grip portion when the safety device is activated. FIG. FIG. 2 is a perspective view showing the actuator body of FIG. 1 . FIG. 6 is a front view showing a schematic view of a main part of the actuator body of FIG. 5 . FIG. 7 is a front view showing a state in which the cam in FIG. 6 has been moved to a retracted position. FIG. 8 is a front view showing a state in which the lifting rod of FIG. 7 is lifted up. 9 is a front view showing a state in which the cam in FIG. 8 has moved to a holding position.

Hereinafter, embodiments will be described with reference to the drawings.
Embodiment 1.
Fig. 1 is a configuration diagram showing an elevator according to embodiment 1. In the figure, a machine room 2 is provided above a hoistway 1. In the machine room 2, a hoist 3, a deflector sheave 4, a control device 5, and a safety monitoring device 6 are installed.

The hoist 3 has a drive sheave 7, a hoist motor (not shown), and a hoist brake (not shown). The hoist motor rotates the drive sheave 7. The hoist brake keeps the drive sheave 7 stationary. The hoist brake also brakes the rotation of the drive sheave 7.

A suspension body 8 is wound around the drive sheave 7 and the deflector sheave 4. A plurality of ropes or a plurality of belts are used as the suspension body 8. A cage 11 is connected to a first end of the suspension body 8. A counterweight 12 is connected to a second end of the suspension body 8.

The car 11 and the counterweight 12 are suspended in the hoistway 1 by the suspension 8. The car 11 and the counterweight 12 move up and down in the hoistway 1 by rotating the drive sheave 7.

The control device 5 controls the hoist 3 to raise and lower the car 11 at a set speed. The safety monitoring device 6 monitors whether the speed of the car 11 has reached an excessive speed. The safety monitoring device 6 also monitors whether the acceleration of the car 11 has reached an excessive acceleration. The excessive speed and excessive acceleration are preset in the safety monitoring device 6. The functions of the control device 5 and the safety monitoring device 6 can each be realized by a computer.

A pair of car guide rails 13 and a pair of counterweight guide rails 14 are installed in the elevator shaft 1. In FIG. 1, only one car guide rail 13 and one counterweight guide rail 14 are shown.

The pair of car guide rails 13 guide the car 11 as it rises and falls. That is, the car 11 rises and falls along the pair of car guide rails 13. The lifting body in embodiment 1 is the car 11.

The pair of counterweight guide rails 14 guide the lifting and lowering of the counterweight 12. That is, the counterweight 12 lifts and lowers along the pair of counterweight guide rails 14.

A car shock absorber 15 and a counterweight shock absorber 16 are installed at the bottom of the elevator shaft 1.

An emergency stop device 17 is provided at the bottom of the car 11. The emergency stop device 17 grips the pair of car guide rails 13 to bring the car 11 to an emergency stop.

The safety monitoring device 6 generates an operation command signal when the speed of the cage 11 reaches an excessive speed and when the acceleration of the cage 11 reaches an excessive acceleration. The operation command signal is a signal that activates the emergency stop device 17.

The car 11 is equipped with an emergency stop operating device 30. The emergency stop operating device 30 has an operating device main body 31 and a lifting rod 32.

The operating device main body 31 is installed on the top of the car 11. In addition, the operating device main body 31 pulls up the lifting rod 32 in response to an operation command signal from the safety monitoring device 6, and activates the emergency stop device 17.

The upper end of the lifting rod 32 is connected to the actuator body 31. The lower end of the lifting rod 32 is connected to the emergency stop device 17.

Figure 2 is a front view showing the schematic configuration of the safety device 17 in Figure 1. The safety device 17 has an operating lever 18, an interlocking lever 19, a connecting rod 20, a first gripping portion 21, and a second gripping portion 22.

The operating lever 18 can rotate around the operating lever shaft 18a. The lower end of the lifting rod 32 is rotatably connected to the operating lever 18. The interlocking lever 19 can rotate around the interlocking lever shaft 19a.

The connecting rod 20 is rotatably connected to the operating lever 18 and the interlocking lever 19. The connecting rod 20 transmits the rotation of the operating lever 18 to the interlocking lever 19, causing the interlocking lever 19 to rotate in conjunction with the operating lever 18. At this time, the rotation direction of the interlocking lever 19 relative to the interlocking lever shaft 19a is opposite to the rotation direction of the operating lever 18 relative to the operating lever shaft 18a.

When the lifting rod 32 is lifted, the operating lever 18 rotates counterclockwise in Figure 2, and the interlocking lever 19 rotates clockwise in Figure 2.

The operating lever 18 is connected to a first gripping portion 21. The first gripping portion 21 grips one of the pair of car guide rails 13 when the operating lever 18 rotates counterclockwise in FIG. 2.

The interlocking lever 19 is connected to the second gripping portion 22. The second gripping portion 22 grips the other of the pair of car guide rails 13 when the interlocking lever 19 rotates clockwise in FIG. 2.

Figure 3 is a front view showing the first gripping portion 21 in Figure 2, showing the state when the safety device 17 is not in operation. Figure 4 is a front view showing the first gripping portion 21 when the safety device 17 is in operation. The configuration of the second gripping portion 22 is the same as that of the first gripping portion 21.

The first gripping portion 21 has a frame 23, a pair of wedge members 24, a pair of wedge guides 25, and a number of wedge guide springs 26.

A pair of wedge members 24 each face a corresponding car guide rail 13. Each wedge guide 25 has an inclined surface 25a. The inclined surface 25a approaches the car guide rail 13 as it moves upward.

Each wedge member 24 can move up and down relative to the frame 23 along the inclined surface 25a of the corresponding wedge guide 25. A plurality of wedge guide springs 26 are provided between the frame 23 and the pair of wedge guides 25.

3, under normal circumstances, the pair of wedge members 24 face the corresponding car guide rails 13 with a gap between them. In contrast, when the safety device 17 is activated, the pair of wedge members 24 are simultaneously pulled up by the pull-up rod 32. At this time, each wedge member 24 is guided by the corresponding inclined surface 25a and approaches the car guide rail 13, until it comes into contact with the car guide rail 13.

When the pair of wedge members 24 are further raised, they move upward while pushing the pair of wedge guides 25 horizontally so as to compress the multiple wedge guide springs 26. The frictional force generated between the car guide rail 13 and the pair of wedge members 24 increases according to the amount of rise of the pair of wedge members 24 relative to the frame 23. As a result, the car guide rail 13 is gripped by the pair of wedge members 24, and the car 9 comes to an emergency stop.

Figure 5 is a perspective view showing the actuator body 31 of Figure 1. Figure 6 is a front view showing a schematic view of the main part of the actuator body 31 of Figure 5.

The operating device main body 31 has a support base 33, a first movable member 34, a second movable member 35, a connecting plate 36, a first eccentric roller 37, a second eccentric roller 38, a first small roller 39 as a first contact portion, a second small roller 40 as a second contact portion, an operating spring device 41, and an actuator 42.

The support base 33 has a horizontal portion 33a and a vertical portion 33b. The horizontal portion 33a is fixed to the upper portion of the car 11. The vertical portion 33b protrudes upward from the horizontal portion 33a. The vertical portion 33b faces the car guide rail 13. A first notch 33c and a second notch 33d are provided at the upper end of the vertical portion 33b.

The first movable member 34 is provided on the vertical portion 33b so as to be rotatable about the first main shaft 43. The first movable member 34 is displaceable between a first normal position shown in Fig. 6 and a first operating position shown in Fig. 7. The first operating position is a position inclined with respect to the first normal position.

The first movable member 34 has a first portion 34a and a second portion 34b. The first portion 34a is on one side of the first main shaft 43, in this example, the upper portion. The second portion 34b is on the other side of the first main shaft 43, in this example, the lower portion.

The upper end of the first portion 34a passes through the first notch 33c. This restricts the range of rotation of the first movable member 34.

The second movable member 35 is provided on the vertical portion 33b so as to be rotatable around the second main shaft 44. The second movable member 35 is displaceable between a second normal position shown in FIG. 6 and a second operating position shown in FIG. 7. The second operating position is a position inclined with respect to the second normal position. The second movable member 35 is disposed symmetrically to the first movable member 34 with the car guide rail 13 as the center.

The second movable member 35 has a third portion 35a and a fourth portion 35b. The third portion 35a is on the same side as the first portion 34a with respect to the second main shaft 44, in this example, the upper portion. The fourth portion 35b is on the same side as the second portion 34b with respect to the second main shaft 44, in this example, the lower portion.

The upper end of the third portion 35a is passed through the second notch 33d, thereby restricting the rotation range of the second movable member 35.

The first main shaft 43 and the second main shaft 44 are arranged horizontally and parallel to the width direction of the car 11. When viewed from directly above, the width direction of the car 11 is a direction parallel to a straight line connecting the centers of a pair of car guide rails 13, and is a direction parallel to the Y axis in Figure 5.

The connecting plate 36 faces the vertical portion 33b. The connecting plate 36 also connects the first main shaft 43 and the second main shaft 44 on the side opposite the vertical portion 33b with respect to the first movable member 34 and the second movable member 35.

The first eccentric roller 37 is provided in the first portion 34a. The first eccentric roller 37 is rotatable in a first forward direction and a first reverse direction around the first roller shaft 45. The first eccentric roller 37 is disk-shaped. The outer peripheral surface of the first eccentric roller 37 is knurled. As a result, when the first eccentric roller 37 is in contact with the car guide rail 13, it rotates while in contact with the car guide rail 13 as the car 11 rises and falls.

The first forward direction is the rotation direction of the first eccentric roller 37 as the cage 11 descends, which is the counterclockwise direction in FIG. 6. The first reverse direction is the rotation direction of the first eccentric roller 37 as the cage 11 ascends, which is the clockwise direction in FIG. 6.

The first roller shaft 45 is arranged parallel to the first main shaft 43. The first roller shaft 45 is also located at a position offset from the center of the first eccentric roller 37.

The upper end of the lifting rod 32 is rotatably connected to the first eccentric roller 37. The lifting rod 32 is connected to the first eccentric roller 37 at a position away from the center of the first eccentric roller 37. The lifting rod 32 is pulled up by the first eccentric roller 37 rotating in the first forward direction while in contact with the car guide rail 13, and activates the emergency stop device 17.

The second eccentric roller 38 is provided in the third portion 35a. The second eccentric roller 38 can rotate in the second forward direction and the second reverse direction around the second roller shaft 46. The second eccentric roller 38 has a disk shape. The outer peripheral surface of the second eccentric roller 38 is knurled. As a result, when the second eccentric roller 38 is in contact with the car guide rail 13, it rotates while in contact with the car guide rail 13 as the car 11 rises and falls.

The second forward direction is the rotation direction of the second eccentric roller 38 as the cage 11 descends, which is the clockwise direction in FIG. 6. The second reverse direction is the rotation direction of the second eccentric roller 38 as the cage 11 ascends, which is the counterclockwise direction in FIG. 6.

The second roller shaft 46 is arranged parallel to the second main shaft 44. The second roller shaft 46 is also positioned offset from the center of the second eccentric roller 38.

The second eccentric roller 38 is arranged symmetrically to the first eccentric roller 37 around the cage guide rail 13.

The second eccentric roller 38 is provided with an additional weight 47. The additional weight 47 is arranged at a position symmetrical to the connection position of the lifting rod 32 on the first eccentric roller 37, with the car guide rail 13 as the center. The additional weight 47 may be attached to the second eccentric roller 38 as a separate member, or may be formed as part of the second eccentric roller 38.

As shown in Fig. 5, the first eccentric roller 37 is provided with a plurality of first punching holes 37a. As a result, the mass of the area of the first eccentric roller 37 where the plurality of first punching holes 37a is provided is smaller than the mass of the area where the plurality of first punching holes 37a is not provided. The lifting rod 32 is connected to the area where the plurality of first punching holes 37a is not provided. In Fig. 6, the plurality of first punching holes 37a is omitted.

The second eccentric roller 38 is provided with a plurality of second punch holes 38a. As a result, the mass of the area of the second eccentric roller 38 where the plurality of second punch holes 38a is provided is smaller than the mass of the area where the plurality of second punch holes 38a is not provided. The additional weight 47 is provided in the area where the plurality of second punch holes 38a is not provided. In FIG. 6, the plurality of second punch holes 38a is omitted.

The first small roller 39 is provided in the first portion 34a. The first small roller 39 is also disposed below the first eccentric roller 37.

The second small roller 40 is provided in the third portion 35a. The second small roller 40 is disposed below the second eccentric roller 38. The first small roller 39 and the second small roller 40 face each other at the same position in the vertical direction.

The operating spring device 41 is provided between the second part 34b and the fourth part 35b. The operating spring device 41 also applies a force to the first movable member 34 and the second movable member 35 to expand the gap between the second part 34b and the fourth part 35b. In other words, the operating spring device 41 applies a force to the first movable member 34 to displace it to the first operating position, and applies a force to the second movable member 35 to displace it to the second operating position.

The actuator 42 is disposed between the first movable member 34 and the second movable member 35. When the emergency stop device 17 is not activated, the actuator 42 resists the activation spring device 41 to hold the first movable member 34 in the first normal position and hold the second movable member 35 in the second normal position.

In addition, in response to an operation command signal from the safety monitoring device 6, the actuator 42 releases the first movable member 34 from the first normal position and releases the second movable member 35 from the second normal position.

The actuator 42 also has a cam 48 and an actuator body 49. The cam 48 is movable in the vertical direction between a holding position shown in FIG. 6 and a retracted position shown in FIG. 7.

The holding position is a position where the cam 48 is interposed between the first small roller 39 and the second small roller 40. When the cam 48 is in the holding position, it is sandwiched between the first small roller 39 and the second small roller 40. This restricts the displacement of the first movable member 34 to the first operating position and the displacement of the second movable member 35 to the second operating position.

The exit position is a position where the cam 48 is out of the holding position. In embodiment 1, the exit position is a position lower than the holding position. A pair of tapered cam slopes are formed on the upper part of the cam 48, which approach each other as they move upward. When the first movable member 34 is displaced to the first operating position and the second movable member 35 is displaced to the second operating position, the first small roller 39 and the second small roller 40 roll on the pair of cam slopes.

The actuator body 49 is located below the cam 48. The actuator body 49 also moves the cam 48 between the holding position and the retracted position.

The actuator body 49 in the first embodiment is a solenoid. The actuator body 49 holds the cam 48 in a holding position when energized, and moves the cam 48 to a retracted position when deenergized.

During normal operation of the cage 11, the emergency stop operating device 30 is maintained in the state shown in Figure 6, i.e., in the normal state.

If the safety monitoring device 6 detects excessive speed or excessive acceleration while the car 11 is descending, an operation command signal is sent from the safety monitoring device 6 to the actuator 42. Then, in response to the operation command signal, the actuator 42 releases its hold on the first movable member 34 and the second movable member 35. In other words, the cam 48 is moved from the holding position to the exit position.

7, the first movable member 34 is displaced from the first normal position to the first operating position by the operating spring device 41, and the second movable member 35 is displaced from the second normal position to the second operating position. The first eccentric roller 37 and the second eccentric roller 38 each come into contact with the car guide rail 13. At this time, the car guide rail 13 is sandwiched between the first eccentric roller 37 and the second eccentric roller 38.

When the cage 11 descends further from the state shown in Figure 7, the first eccentric roller 37 rotates in the first forward direction due to the descent of the cage 11, and the lifting rod 32 is pulled up as shown in Figure 8, activating the emergency stop device 17.

In addition, since the first roller shaft 45 is positioned at a position offset from the center of the first eccentric roller 37, when the lifting rod 32 is pulled up, the first movable member 34 is returned to the first normal position against the operating spring device 41.

In addition, since the second roller shaft 46 is positioned at a position offset from the center of the second eccentric roller 38, the rotation of the second eccentric roller 38 in the second forward direction due to the descent of the cage 11 returns the second movable member 35 to the second normal position against the operating spring device 41.

In this state, the first movable member 34 is held in the first normal position by the first eccentric roller 37, without relying on the actuator 42. The second movable member 35 is held in the second normal position by the second eccentric roller 38, without relying on the actuator 42.

When releasing the braking state applied by the emergency stop device 17, the cam 48 is moved from the exit position to the holding position as shown in Figure 9, and then the cage 11 is raised.

9 shows a state in which the first eccentric roller 37 and the second eccentric roller 38 are in contact with the car guide rail 13, and the first movable member 34 is held in the first normal position and the second movable member 35 is held in the second normal position by the actuator 42. When the car 11 rises from this state, the first eccentric roller 37 rotates in the first reverse direction while in contact with the car guide rail 13, and moves away from the car guide rail 13.

After separating from the cage guide rail 13, the first eccentric roller 37 rotates further in the first reverse direction due to the mass imbalance of the first eccentric roller 37 itself and the weight of the lifting rod 32, returning to the state shown in Figure 6.

When the cage 11 rises from the state shown in Figure 9, the second eccentric roller 38 rotates in the second reverse direction while in contact with the cage guide rail 13 and moves away from the cage guide rail 13.

After leaving the cage guide rail 13, the second eccentric roller 38 rotates further in the second reverse direction due to the mass imbalance of the second eccentric roller 38 itself and the load of the additional weight 47, returning to the state shown in Figure 6.

In this type of elevator emergency stop operating device 30, the first roller shaft 45 is positioned at a position offset from the center of the first eccentric roller 37. Furthermore, when the actuator 42 releases the hold of the first movable member 34, the first eccentric roller 37 comes into contact with the car guide rail 13. Then, due to the rotation of the first eccentric roller 37 in the first forward direction caused by the descent of the car 11, the lifting rod 32 is lifted and the first movable member 34 is returned to the first normal position against the operating spring device 41.

Therefore, there is no need for the actuator 42 to return the first movable member 34 to the first normal position, and the capacity of the actuator 42 can be reduced.

In addition, when the first eccentric roller 37 comes into contact with the car guide rail 13 and the car 11 rises from a state in which the first movable member 34 is held in the first normal position, the first eccentric roller 37 rotates in the first reverse direction and moves away from the car guide rail 13. The first eccentric roller 37 then further rotates in the first reverse direction due to the weight of the lifting rod 32.

This makes it easy to perform the reset operation of the emergency stop operating device 30 and the emergency stop device 17.

The first movable member 34 is mounted on the cage 11 so as to be rotatable about the first main shaft 43. The first operating position is a position inclined with respect to the first normal position. This allows the first eccentric roller 37 to be displaced with a simple configuration.

In addition, the second movable member 35 and the second eccentric roller 38 are arranged symmetrically to the first movable member 34 and the first eccentric roller 37, respectively, with respect to the cage guide rail 13, and operate in the same manner as the first movable member 34 and the first eccentric roller 37, respectively.

This prevents eccentric loads from being applied to the car guide rail 13 when the emergency stop device 17 is activated, allowing the emergency stop operating device 30 to operate stably.

Furthermore, when the second eccentric roller 38 comes into contact with the car guide rail 13 and the car 11 rises from a state in which the second movable member 35 is held in the second normal position, the second eccentric roller 38 rotates in the second reverse direction and moves away from the car guide rail 13. The second eccentric roller 38 then further rotates in the second reverse direction.

This makes it easy to perform the reset operation of the emergency stop operating device 30 and the emergency stop device 17.

The second movable member 35 is mounted on the cage 11 so as to be rotatable about the second main shaft 44. The second operating position is a position inclined with respect to the second normal position. This allows the first eccentric roller 37 to be displaced with a simple configuration.

The first eccentric roller 37 is provided on the first portion 34a, and the second eccentric roller 38 is provided on the third portion 35a. The operating spring device 41 applies a force to the first movable member 34 and the second movable member 35 that widens the gap between the second portion 34b and the fourth portion 35b. This makes it possible to smoothly displace the first movable member 34 to the first operating position and the second movable member 35 to the second operating position with a simple configuration.

The cam 48 is moved between a holding position and a retracted position by the actuator body 49. The holding position is a position where the cam 48 is interposed between the first portion 34a and the third portion 35a, and the retracted position is a position away from the holding position.

Therefore, with a simple configuration, the first movable member 34 can be held in the first normal position while the second movable member 35 can be held in the second normal position. In addition, with a simple configuration, the held states of the first movable member 34 and the second movable member 35 can be released simultaneously.

The actuator body 49 is a solenoid. When energized, the actuator body holds the cam 48 in the holding position, and when de-energized, moves the cam 48 to the retracted position. This simple configuration allows the first movable member 34 and the second movable member 35 to be released from their held states at the same time.

In addition, since the operating device main body 31 is installed on the top of the car 11, maintenance and inspection work on the emergency stop operating device 30 can be easily performed on the top of the car 11.

The operating device main body 31 may be installed elsewhere than on the top of the cage 11.

Furthermore, each of the first contact portion and the second contact portion may be, for example, a simple protrusion portion.

In addition, the outer peripheral surface of the first eccentric roller 37 and the outer peripheral surface of the second eccentric roller 38 may each be subjected to an anti-slip treatment other than knurling. In addition, the outer peripheral surface of the first eccentric roller 37 and the outer peripheral surface of the second eccentric roller 38 may each be made of a material having a high coefficient of friction with the car guide rail 13.

In addition, a low-friction portion may be provided on each of the outer peripheral surfaces of the first eccentric roller 37 and the second eccentric roller 38 at a portion that comes into contact with the car guide rail 13 when the lifting rod 32 is fully lifted. The coefficient of friction of each low-friction portion with respect to the car guide rail 13 is smaller than the coefficient of friction of each low-friction portion with respect to the car guide rail 13 at a portion adjacent to each low-friction portion.

For example, if the outer peripheral surface of the first eccentric roller 37 and the outer peripheral surface of the second eccentric roller 38 are each subjected to knurling, each low friction portion is a portion that is not subjected to knurling.

In this configuration, when the lifting rod 32 is fully lifted, i.e., when the emergency stop device 17 is activated, the frictional force between the first eccentric roller 37 and the second eccentric roller 38 and the car guide rail 13 is kept small. Therefore, even if the car 11 slips against the car guide rail 13 after the emergency stop device 17 is activated, the position of the emergency stop operating device 30 can be easily maintained with a small force.

The operating spring device 41 may also have a first spring that displaces the first movable member 34 and a second spring that displaces the second movable member 35.

The actuator 42 may also hold the first movable member 34 and the second movable member 35 separately.

The first movable member 34 may also slide between a first normal position and a first actuated position. Similarly, the second movable member 35 may slide between a second normal position and a second actuated position.

Also, in FIG. 8, the first movable member 34 is returned to the first normal position, and the second movable member 35 is returned to the second normal position. However, the first movable member 34 does not necessarily have to be returned completely to the first normal position as long as it is returned to the first normal position side. Also, the second movable member 35 does not necessarily have to be returned completely to the second normal position as long as it is returned to the second normal position side. In this case, too, if the amount of displacement of the first movable member 34 and the second movable member 35 by the actuator 42 is small, the capacity of the actuator 42 can be made small.

In addition, the second movable member 35 and the second eccentric roller 38 may be omitted.

In addition, the safety monitoring device 6 may monitor only one of excessive speed of the cage 11 and excessive acceleration of the cage 11.

The emergency stop device 17 may also be configured to be activated by a mechanical governor.

The lifting body may be a counterweight 12 or both the cage 11 and the counterweight 12.

In addition, the overall layout of the elevator is not limited to the layout in Figure 1. For example, the roping system may be a 2:1 roping system.

The elevator may also be a machine room-less elevator, a double deck elevator, a one-shaft multi-car elevator, etc. The one-shaft multi-car system is a system in which an upper car and a lower car located directly below the upper car each independently ascend and descend in a common elevator shaft.

11 Cage (lifting body), 13 Cage guide rail, 17 Emergency stop device, 30 Emergency stop operating device, 32 Lifting rod, 34 First movable member, 34a First part, 34b Second part, 35 Second movable member, 35a Third part, 35b Fourth part, 37 First eccentric roller, 38 Second eccentric roller, 39 First small roller (first contact portion), 40 Second small roller (second contact portion), 41 Operating spring device, 42 Actuator, 43 First main shaft, 44 Second main shaft, 45 First roller shaft, 46 Second roller shaft, 48 Cam, 49 Actuator body.

Claims (10)

a first movable member provided on a lifting body that moves up and down along a guide rail and that is displaceable between a first normal position and a first operating position;
a first eccentric roller that is provided on the first movable member so as to be rotatable about a first roller shaft in a first forward direction and a first reverse direction, and that, when in contact with the guide rail, rotates while in contact with the guide rail in association with the elevation of the lifting body;
a lifting rod connected to the first eccentric roller, which is lifted up by the first eccentric roller rotating in the first forward direction while contacting the guide rail, thereby activating an emergency stop device;
an actuation spring device that applies a force to the first movable member to displace it to the first actuation position; and an actuator that holds the first movable member at the first normal position against the actuation spring device when the emergency stop device is not in operation, and releases the holding of the first movable member at the first normal position in response to an actuation command signal that actuates the emergency stop device,
the first roller shaft is positioned at a position offset from the center of the first eccentric roller,
When the actuator releases its hold on the first movable member in response to the operation command signal, the operating spring device displaces the first movable member from the first normal position to the first operating position, causing the first eccentric roller to contact the guide rail, and the lifting rod is pulled up by the rotation of the first eccentric roller in the first forward direction due to the descent of the lifting body, and the first movable member is returned to the first normal position against the operating spring device. The emergency stop operating device for an elevator according to claim 1, wherein when the first eccentric roller contacts the guide rail and the first movable member is held in the first normal position by the actuator, and the lifting body rises, the first eccentric roller rotates in the first reverse direction while contacting the guide rail, separates from the guide rail, and further rotates in the first reverse direction due to the weight of the lifting rod. the first movable member is provided on the lift body so as to be rotatable about a first main shaft,
3. The emergency stop operating device for an elevator according to claim 1, wherein the first operating position is an inclined position with respect to the first normal position. a second movable member provided on the lifting body and displaceable between a second normal position and a second operating position; and a second eccentric roller provided on the second movable member so as to be rotatable about a second roller axis in a second forward direction and a second reverse direction, and when in contact with the guide rail, rotates while in contact with the guide rail in accordance with the lifting body being raised and lowered,
the second roller shaft is positioned at a position offset from the center of the second eccentric roller,
The second movable member is disposed symmetrically with respect to the first movable member with respect to the guide rail,
the second eccentric roller is disposed symmetrically to the first eccentric roller with respect to the guide rail;
the actuation spring device applies a force to the second movable member to displace it to the second actuation position;
the actuator holds the second movable member at the second normal position against the actuation spring device when the emergency stop device is not actuated, and releases the second movable member from the second normal position in response to the actuation command signal;
2. The emergency stop operating device for an elevator according to claim 1, wherein when the actuator releases its hold on the second movable member in response to the operating command signal, the operating spring device displaces the second movable member from the second normal position to the second operating position, causing the second eccentric roller to contact the guide rail, and the second movable member is returned to the second normal position against the operating spring device by the rotation of the second eccentric roller in the second forward direction due to the descent of the lifting body. When the first eccentric roller and the second eccentric roller come into contact with the guide rail, and the lifting body rises from a state in which the first movable member is held at the first normal position and the second movable member is held at the second normal position by the actuator,
The first eccentric roller rotates in the first reverse direction while in contact with the guide rail, and separates from the guide rail, and further rotates in the first reverse direction due to the weight of the lifting rod,
5. The emergency stop operating device for an elevator according to claim 4, wherein the second eccentric roller rotates in the second reverse direction while in contact with the guide rail, separates from the guide rail, and further rotates in the second reverse direction. the first movable member is provided on the lift body so as to be rotatable about a first main shaft,
the first operating position is an inclined position relative to the first normal position,
the second movable member is provided on the lift body so as to be rotatable about a second main shaft,
6. The emergency stop operating device for an elevator according to claim 4 or 5, wherein the second operating position is a position inclined with respect to the second normal position. the first movable member has a first portion which is a portion on one side of the first main shaft and a second portion which is a portion on the other side of the first main shaft,
the second movable member has a third portion which is a portion on the same side as the first portion with respect to the second main shaft, and a fourth portion which is a portion on the same side as the second portion with respect to the second main shaft,
The first eccentric roller is provided in the first portion,
the second eccentric roller is provided in the third portion,
7. The emergency stop operating device for an elevator according to claim 6, wherein the operating spring device applies a force to the first movable member and the second movable member to increase the distance between the second portion and the fourth portion. The first portion is provided with a first contact portion,
The third portion is provided with a second contact portion,
The actuator comprises:
a cam movable between a holding position, which is a position interposed between the first contact portion and the second contact portion, and a retracted position, which is a position away from the holding position;
8. The emergency stop operating device for an elevator according to claim 7, further comprising: an actuator body for moving the cam. The elevator emergency stop operating device according to claim 8, wherein the actuator body is a solenoid that holds the cam in the holding position when energized and moves the cam to the retracted position when de-energized. a low-friction portion is provided on an outer circumferential surface of the first eccentric roller at a portion that comes into contact with the guide rail when the lifting bar is fully lifted up;
10. The emergency stop operating device for an elevator according to claim 1, wherein a coefficient of friction between the low friction portion and the guide rail is smaller than a coefficient of friction between a portion adjacent to the low friction portion and the guide rail.

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