WO2015122054A1

WO2015122054A1 - Elevator device

Info

Publication number: WO2015122054A1
Application number: PCT/JP2014/077890
Authority: WO
Inventors: 孝太郎福井; 渡辺　誠治; 直浩白石
Original assignee: 三菱電機株式会社
Priority date: 2014-02-14
Filing date: 2014-10-21
Publication date: 2015-08-20
Also published as: CN106029544A; JPWO2015122054A1; JP6058176B2; CN106029544B; DE112014006364T5

Abstract

The purpose of the present invention is to actuate an emergency stop device in a short amount of time in the vicinity of the lowest floor where the emergency stop device would need to be actuated in a short amount of time, and to suppress the occurrence of malfunctions of the emergency stop device when the car is far from the lowest floor. The present invention is provided with an emergency stop device (13) for performing an emergency stop of a vertically moving body (3). The emergency stop device (13) is provided with: a wedge-shaped body (15) with which, when an acceleration difference between the vertically moving body (3) and a governor rope (12) has occurred, an emergency stop of the vertically moving body (3) is performed by raising a damper (21) by at least a raising distance and pressing the damper against a guide rail (6); a spring (17) having a pressing force in a direction that hinders the raising of the damper (21); and an emergency stop duration adjustment unit for curtailing the time needed for an emergency stop by modifying the position of an emergency stop duration adjustment end when the vertically moving body (3) is in the vicinity of the lowest floor.

Description

Elevator equipment

The present invention relates to an elevator apparatus for emergency stopping a car in an emergency.

Some elevator devices have a function to stop the car in an emergency by attaching a governor rope to the entire vertical direction of the hoistway and connecting the governor rope and the car with an emergency stop device. When the main rope that suspends the car breaks, there is a difference in acceleration between the car and the governor, and the sliding part of the wedge-shaped body is lifted by a certain distance or more, so that friction between the guide rail and the wedge-shaped body occurs. To stop the car. (For example, see Patent Document 1)

WO2012 / 059970

A conventional elevator apparatus includes a mass body such as a governor rope that operates in relation to the movement of the car, and thereby, in all of the stop state, the acceleration state, the constant speed traveling state, and the deceleration state, the acceleration in the normal state is achieved. In comparison, the emergency stop device operates when a predetermined acceleration difference is exceeded. Therefore, when the predetermined acceleration difference is set to a small value, the emergency stop device can be operated in a short time. However, when the car vibrates up and down due to the car swaying, etc., the emergency stop device malfunctions. There was a problem.

The present invention has been made to solve the above-mentioned problems. The emergency stop device is operated in a short time in the vicinity of the lowest floor where the emergency stop device needs to be operated in a short time. The purpose is to suppress the malfunction of the emergency stop device when it is far from the lower floor.

The elevator apparatus according to the present invention includes an emergency stop device that performs an emergency stop of the lifting body, and when the acceleration difference between the lifting body and the governor rope is generated, the brake element is lifted above the lifting distance and pressed against the guide rail. Change the position of the emergency stop time adjustment end when the lifting body is in the vicinity of the lowermost floor, and the wedge-shaped body for emergency stop of the lifting body, the spring with the pressing force in the direction to prevent the lifting of the brake And an emergency stop time adjusting unit that shortens the time required for the emergency stop.

According to the present invention, the emergency stop device that performs the emergency stop of the lifting body is provided, and when the acceleration difference between the lifting body and the governor rope is generated, the brake element is lifted more than the lifting distance and pressed against the guide rail. To change the position of the emergency stop time adjustment end when the lifting body is near the bottom floor. The emergency stop time adjustment unit that shortens the time required for emergency stop is provided, so that the emergency stop device is operated in a short time near the lowest floor where the operation of the emergency stop device is required in a short time, When the car is far from the lowest floor, it is possible to realize the occurrence of malfunction of the emergency stop device with a simple configuration.

It is a block diagram of the elevator apparatus by Embodiment 1 of this invention. It is the block diagram which showed a part of elevator apparatus by Embodiment 1 of this invention. It is a block diagram of the wedge-shaped body by Embodiment 1 of this invention. It is a block diagram of the emergency stop apparatus by Embodiment 1 of this invention. It is a figure which shows the relationship between the position of the cage | basket in Embodiment 1 of this invention, and the spring force of a spring. It is a block diagram of the emergency stop apparatus by Embodiment 1 of this invention. It is a block diagram of the emergency stop apparatus by Embodiment 1 of this invention. It is a figure which shows the relationship between the position of the cage | basket in Embodiment 1 of this invention, and the spring force of a spring. It is a block diagram of the emergency stop apparatus by Embodiment 2 of this invention. It is a block diagram of the emergency stop apparatus by Embodiment 3 of this invention. It is a block diagram of the elevator apparatus by Embodiment 4 of this invention. It is the block diagram which showed a part of elevator apparatus by Embodiment 4 of this invention. It is a block diagram of the emergency stop apparatus by Embodiment 4 of this invention. It is the block diagram which showed a part of elevator apparatus by Embodiment 4 of this invention. It is a block diagram of the elevator apparatus by Embodiment 5 of this invention. It is a block diagram of the elevator apparatus by Embodiment 6 of this invention. It is a block diagram of the elevator apparatus by Embodiment 7 of this invention.

Embodiment 1
FIG. 1 shows an example of an elevator apparatus according to Embodiment 1 of the present invention. The elevator apparatus shown in FIG. 1 has a 1: 1 roping configuration. A machine room 2 is provided in the upper part of the hoistway 1. Inside the hoistway 1, a car 3 and a counterweight 4 are suspended by a suspension body 5, and the car 3 moves up and down the hoistway 1 along the guide rail 6. As the suspension body 5, for example, a rope or a belt is used.

The car 3 has a car frame and a car room supported by the car frame. The counterweight 4 has a weight frame and a plurality of weight blocks supported by the weight frame. In the hoistway 1, a loop governor rope 12 is installed in the vicinity of the car 3 in parallel with the suspension body 5. A governor rope different from the governor rope 12 may be connected to the counterweight 4 and installed.

In the machine room 2, a hoisting machine 8 that generates a driving force for raising and lowering the car is installed, and a driving sheave 9 is connected to the hoisting machine 8. The suspension body 5 is continuously wound around the driving sheave 9 and the deflecting wheel 7, and the car 3 and the counterweight 4 move up and down in the hoistway 1 by rotating the driving sheave 9. Moving. A governor 14 is installed on the upper part of the governor rope 12.

At the lower end of the hoistway 1, a car shock absorber 10 located below the car 3 and a counterweight shock absorber 11 located below the counterweight 4 are installed.

FIG. 2 shows an enlarged view of the car 3 in the hoistway 1 according to Embodiment 1 of the present invention. The governor rope 12 is connected to the car 3 via an emergency stop device 13 and moves up and down in conjunction with the vertical movement of the car 3. The emergency stop device 13 includes a wedge 15, an arm 16, a spring 17, a roller 18, a gear portion 19, and a rack gear 20 described later. The wedge-shaped body 15 is installed so as to sandwich the guide rail 6. The arm 16 connects the governor rope 12, the wedge-shaped body 15, and the spring 17, and rotates according to the vertical position difference between the car 3 and the governor rope 12.

FIG. 3 is a configuration diagram of the wedge-shaped body 15 according to the first embodiment of the present invention. In FIG. 2, (a) shows the state at the normal time, and (b) shows the state at the time of operation of the emergency stop device. The wedge-shaped body 15 includes a pinching body 22 and a brake element 21. The brake element 21 is connected to the arm 16. In normal times, the brake element 21 is in a position where it does not contact the rail 6. When a difference occurs in the vertical position between the governor rope 12 and the car 3, the arm 16 rotates, whereby the brake element 21 connected to the arm 16 is pulled up in the pinching body 22. When the brake element 21 is pulled up by the lifting distance d, the brake element 21 sandwiches the guide rail 6 to generate a braking force due to friction, resulting in an emergency stop state.

In FIG. 3, when the position of the brake element 21 is lifted from the position indicated by the solid line to the position indicated by the dotted line while the position of the pinching body 22 is fixed, the brake element 21 necessary for generating a braking force. The lifting distance, which is the movement distance of, becomes shorter from d to d ′, and as a result, the emergency stop time, which is the time required for an emergency stop, becomes shorter. As described above, since the emergency stop time can be adjusted by moving the position of the brake element 21 before the operation of the emergency stop device, the position before the operation of the brake element 21 is one of the emergency stop time adjustment ends. In Embodiment 1 of the present invention, the brake element 21 is not moved before the safety device is activated.

FIG. 4 shows a configuration diagram of the safety device 13 according to Embodiment 1 of the present invention. The emergency stop device 13 includes an arm 16 connected to the governor rope 12, a wedge-shaped body 15, a spring 17, a roller 18, a gear portion 19, and a rack gear 20. The arm 16 rotates around the fulcrum 23.

When the difference in vertical position occurs between the governor rope 12 and the car 3 and the car 3 is lowered to a position below the governor rope 12, the arm 16 rotates clockwise around the fulcrum 23. As a result, the brake element 21 of the wedge-shaped body 15 moves upward. For example, a difference occurs in the vertical position between the governor rope 12 and the car 3 due to a braking operation by the hoisting machine 8 during traveling or a car swing by a passenger inside the car 3, and the brake element 21 of the wedge-shaped body 15 is When the lift distance d is raised, a braking force is generated, and the emergency stop device 13 malfunctions. Therefore, in order to prevent malfunction, the spring 17 is installed so as to push the arm 16 in the counterclockwise direction.

The car 3 is provided with a roller 18 that contacts the guide rail 6 and rotates as the car moves up and down. Further, the car 3 is provided with a gear portion 19 that decelerates the rotation of the roller 18 and a rack gear 20 that converts the rotational motion of the gear portion 19 into a linear motion. The spring 17 is installed in a state of being pushed in advance between the arm 16 and the rack gear 20. The rack gear 20 moves to the left and right in conjunction with the vertical position of the car 3 and is located on the rightmost side when the car 3 is located on the lowest floor. Thereby, the force with which the spring 17 pushes the arm 16 becomes the weakest when the car 3 is located on the lowest floor.

When the car 3 is dropped due to the breakage of the suspension body 5 or the like, the car 3 is in a free fall state (moves downward at 1 G acceleration), but the governor rope 12 is not in a free fall state, so the governor rope 12 and the car 3 There is a difference in acceleration. Due to this difference, the arm 16 rotates around the fulcrum 23 in the clockwise direction in FIG. As a result, a force is applied in a direction in which the brake element 21 in the wedge 15 is pulled up. When this force exceeds the weight of the brake element 21 and the spring force of the spring 17, the brake element 21 is pulled up. When the brake element 21 is lifted by the lifting distance d, the brake element 21 comes into contact with the guide rail 6 and the free fall of the car 3 is suppressed by the frictional force.

If the car 3 falls due to breakage of the suspension body 5 in the vicinity of the lowest floor and collides with the car shock absorber 10 before it is sufficiently decelerated by the emergency stop device 13, the speed at the time of the collision is reduced by the car shock absorber 10. Must absorb. Therefore, the speed at which the car 3 collides with the car shock absorber 10 must be a speed that does not exceed the deceleration capability of the car shock absorber 10. When the speed at which the car 3 collides with the car shock absorber 10 is high, it is necessary to increase the distance from the lowest floor to the car shock absorber 10 or to install a large car shock absorber 10 having a large deceleration capacity. There is. However, the vertical dimension of the hoistway 1 is as short as possible, and there is a demand to use a small car shock absorber 10.

FIG. 5 is a diagram showing the relationship between the position of the car 3 and the spring force of the spring 17 in Embodiment 1 of the present invention. When the car 3 descends in the lowermost floor direction, the roller 18 rotates in the clockwise direction, whereby the gear portion 19 rotates in the counterclockwise direction, and the rack gear 20 moves in the right direction. As a result, the spring 17 is extended, and the spring force with which the spring 17 pushes the arm 16 leftward is reduced. For example, the relationship between the position of the car 3 and the spring force of the spring 17 is shown as a “linear characteristic” by a one-dot chain line in FIG.

When the car 3 is in the vicinity of the lowermost floor, the spring force of the spring 17 is reduced, and the arm 16 is easily rotated clockwise. As a result, even if the acceleration difference between the governor rope 12 and the car 3 is small, the safety device 13 operates, and the time from the breakage of the suspension body 5 to the operation of the safety device 13 is shortened. . On the other hand, when the car 3 is in the vicinity of the top floor, the spring force of the spring 17 is increased, and the arm 16 is difficult to turn clockwise. As a result, the emergency stop device 13 does not operate unless the difference in acceleration between the governor rope 12 and the car 3 is large, and the time from the breakage of the suspension body 5 to the operation of the emergency stop device 13 becomes longer. . That is, in FIG. 4, the end of the spring 17 that is not connected to the arm 16 is one of the emergency stop time adjustment ends because the emergency stop time can be adjusted by moving the position. As a mechanism for converting the rotational movement of the roller 18 into the position movement of the end portion not connected to the arm 16 of the spring 17, in addition to the rack gear, a timing belt, a cam, a link, etc., or a combination thereof can be rotated. As long as it has the function of the motion conversion part which converts a motion into a linear motion, you may use them.

As a result, the speed at which the car 3 collides with the car shock absorber 10 in the vicinity of the lowest floor can be reduced, so that a small car shock absorber 10 can be applied and the vertical dimension of the hoistway 1 can be shortened. It becomes. Further, in the vicinity of the top floor, the difference in acceleration between the governor rope 12 and the car 3 necessary for the operation of the safety device 13 increases, so that the brake operation by the hoisting machine 8 and the passengers inside the car 3 It is possible to reduce malfunctions of the emergency stop device 13 due to car shaking or the like.

In addition, when the spring force of the spring 17 is large in the vicinity of the top floor, the time from the breakage of the suspension body 5 to the operation of the emergency stop device 13 becomes long, but the distance from the car 3 to the car shock absorber 10 is sufficient. Therefore, the car 3 can be stopped before the car 3 collides with the car shock absorber 10.

If it is not desired to increase the spring force of the spring 17 more than necessary near the top floor or in the middle floor, it is only necessary to have a characteristic as shown as “nonlinear characteristic” by a solid line in FIG. As a result, it is possible to achieve both of obtaining a sufficient operation speed of the safety device 13 in the vicinity of the lowermost floor and reducing malfunctions in the vicinity of the uppermost floor and the intermediate floor.

The “nonlinear characteristics” shown in FIG. 5 can be realized by the configuration shown in FIGS. 6 and 7, for example.

In the configuration shown in FIG. 6, a cam 24 is installed in the gear unit 19. By changing the shape of the cam 24, it is possible to set the pushing distance of the spring 17 nonlinearly.

7, a link 25 that rotates simultaneously with the gear unit 19 is installed in the gear unit 19. In this configuration, the pushing distance of the spring 17 can be set non-linearly by changing the initial position and configuration of the link 25.

Further, in normal operation of the elevator, when the car 3 is at the position of the lowest floor, it does not have a downward speed. At a position slightly above the lower floor, it is necessary to shorten the time from when the suspension body 5 is broken until the emergency stop device 13 is operated. Therefore, the relationship between the car position of the car 3 and the spring force of the spring 17 can be a curve as shown in FIG. Thereby, the malfunction of the emergency stop device 13 can be further reduced.

In Embodiment 1 of the present invention, the emergency stop device 13 is installed between the car 3 and the governor rope 12, but may be installed between the counterweight 4 and the governor rope 12.

Embodiment 2
FIG. 9 is a configuration diagram of the safety device 13 according to the second embodiment of the present invention. In the configuration shown in FIG. 9, when the car 3 descends in the lowest floor direction, the roller 18 rotates in the clockwise direction, whereby the gear portion 19 rotates in the counterclockwise direction, and the rack gear 26 moves in the upward direction. To do. The rack gear 26 is configured to support the brake element 21 of the wedge-shaped body 15 from below. When the rack gear 26 moves upward, the brake element 21 moves upward in the wedge-shaped body 15. For example, when the car 3 moves to the lowermost layer, the position of the brake element 21 before the emergency stop operation moves upward to the position d ′ in FIG. As a result, the lifting distance at which the braking force is generated in the emergency stop device 13 is shortened from d to d ′, and the time from the breakage of the suspension body 5 to the operation of the emergency stop device 13 is shortened. On the other hand, when the car 3 rises to the vicinity of the top floor, the brake element 21 moves downward, and the lifting distance at which the braking force is generated in the emergency stop device 13 becomes larger than d ′, and the braking operation by the hoisting machine 8 is performed. It is possible to reduce malfunctions of the emergency stop device 13 due to car shaking by passengers inside the car 3.

The relationship between the car position of the car 3 and the vertical position of the brake element 21 may be linear or non-linear.

Embodiment 3
FIG. 10 shows a configuration diagram of the safety device 13 according to Embodiment 3 of the present invention. In the configuration shown in FIG. 10, when the car 3 descends in the lowermost floor direction, the roller 18 rotates in the clockwise direction, whereby the gear portion 19 rotates in the counterclockwise direction, and the rack gear 27 moves in the upward direction. To do. The rack gear 27 is connected to the fulcrum 23 of the arm 16 and the end of the spring 17, and when the rack gear 27 moves upward, the arm 16 and the spring 17 move upward, so that the brake element 21 moves upward in the wedge-shaped body 15. Move in the direction. For example, when the car 3 moves to the lowermost layer, the brake element 21 moves upward to the position d ′ in FIG. As a result, the lifting distance at which the braking force is generated in the emergency stop device 13 is shortened from d to d ′, and the time from the breakage of the suspension body 5 to the operation of the emergency stop device 13 is shortened. On the other hand, when the car 3 rises to the vicinity of the top floor, the brake element 21 moves downward, and the lifting distance at which the braking force is generated in the emergency stop device 13 becomes larger than d ′, and the braking operation by the hoisting machine 8 is performed. It is possible to reduce malfunctions of the emergency stop device 13 due to car shaking by passengers inside the car 3.

Embodiment 4
FIG. 11 shows an example of an elevator apparatus according to Embodiment 4 of the present invention. The elevator apparatus shown in FIG. 11 has a 2: 1 roping configuration. A suspension wheel 28 is provided above the car 3, and a suspension wheel 29 is provided above the counterweight 4. The suspension body 5 is wound around a suspension wheel 28, a drive sheave 9, a deflector 7, and a suspension wheel 29. Both ends of the suspension body 5 are fixed to the lower part of the machine room 2. The emergency stop device 13 is installed on the upper portion of the car 3.

FIG. 12 shows an enlarged view of the car 3 in the hoistway 1 according to Embodiment 4 of the present invention.

FIG. 13 shows a configuration diagram of the safety device 13 according to Embodiment 4 of the present invention. The emergency stop device 13 includes an arm 16 connected to the governor rope 12, a wedge-shaped body 15, a spring 17, a suspension wheel 28, a gear portion 19, and a rack gear 20. The arm 16 rotates around the fulcrum 23.

When the car 3 descends in the lowermost floor direction, the suspension wheel 28 rotates in the clockwise direction, whereby the gear portion 19 rotates in the counterclockwise direction, and the rack gear 20 moves in the right direction. As a result, the spring 17 is extended, and the spring force with which the spring 17 pushes the arm 16 leftward is reduced. For example, the relationship between the position of the car 3 and the spring force of the spring 17 is shown as a “linear characteristic” by a one-dot chain line in FIG.

In addition, when the suspension body 5 is broken, the suspension wheel 28 may be idled. Even in this case, the inertia weight is set so that the rotation ratio between the suspension wheel 28 and the gear portion 19 does not change. When the rotational resistance is set between the suspension wheel 28 and the gear portion 19 or the rope tension is lost, the gear portion 19 and the rack gear 20 are disengaged. Thereby, even when the suspension body 5 is broken, the spring force of the spring 17 is maintained at a value corresponding to the car position at the time of the break.

Thus, in the 2: 1 roping configuration, it is possible to realize an elevator apparatus that obtains the same effects as those of the first embodiment of the present invention without requiring a roller.

In Embodiment 4 of the present invention, the suspension car 28 is installed on the upper part of the car 3, but the suspension car 28 may be installed on the lower part of the car 3 as shown in FIG.

Further, as shown in the second and third embodiments, the position of the brake member 21 of the wedge-shaped body 15 before the operation of the emergency stop device may be changed by the rotation of the suspension wheel 28. In addition to the rack gear, a cam or the like may be used as the motion conversion unit.

Embodiment 5
FIG. 15 shows a block diagram of an elevator apparatus according to Embodiment 5 of the present invention. In the elevator apparatus according to the fifth embodiment, the protruding portion 31 is provided from the vicinity of the lowermost floor of the hoistway wall 30 to the lowermost floor. When the car 3 is lowered to the vicinity of the lowermost floor, the link 32 hits the projection 31 and the link 32 rotates in the direction of the arrow. As a result, the spring 17 is spread and the spring force of the spring 17 is reduced.

As a result, the speed at which the car 3 collides with the car shock absorber 10 in the vicinity of the lowest floor can be reduced, so that a small car shock absorber 10 can be applied and the vertical dimension of the hoistway 1 can be shortened. It becomes. Furthermore, when the car 3 is in a place other than the vicinity of the lowermost floor, the difference in acceleration between the governor rope 12 and the car 3 required for the operation of the emergency stop device 13 becomes large. It is possible to reduce malfunctions of the emergency stop device 13 due to braking operation or car shaking by passengers inside the car 3.

Also, as shown in the second and third embodiments, the position of the brake element 21 of the wedge-shaped body 15 before the operation of the emergency stop device may be changed by the movement of the link 32.

Embodiment 6
FIG. 16 shows a configuration diagram of an elevator apparatus according to Embodiment 6 of the present invention. In the elevator apparatus according to the sixth embodiment, a protrusion 33 is provided in the vicinity of the lowest floor of the hoistway wall 30. When the car 3 is lowered to the protruding portion position, the link 34 hits the protruding portion 33, so that the link 34 rotates in the direction of the arrow. As a result, the spring 17 is spread and the spring force of the spring 17 is reduced. The state where the link 34 is pulled up is held by the latch 35 and reaches the lowest floor. When the car 3 rises from the lowermost floor to the protruding portion position, the link 34 in the pulled-up state hits the protruding portion 33, so that the link 34 rotates in the direction opposite to the arrow, and the spring 17 is pushed in. Spring force increases. The state where the link 34 is pulled down is held by the latch 35.

As a result, the speed at which the car 3 collides with the car shock absorber 10 in the vicinity of the lowest floor can be reduced, so that a small car shock absorber 10 can be applied and the vertical dimension of the hoistway 1 can be shortened. It becomes. Furthermore, when the car 3 is in a place other than the vicinity of the lowermost floor, the difference in acceleration between the governor rope 12 and the car 3 required for the operation of the emergency stop device 13 becomes large. It is possible to reduce malfunctions of the emergency stop device 13 due to braking operation or car shaking by passengers inside the car 3. Furthermore, since no roller or gear is required, an emergency stop device can be realized with a simple structure.

Further, as shown in the second and third embodiments, the position of the brake element 21 of the wedge-shaped body 15 before the operation of the emergency stop device may be changed by the movement of the link 34.

Further, if the link 34 on the car 3 is in a contact position, the protrusion 33 may be fixed to other equipment in the hoistway, or the state of the link 34 is switched by using magnetic force, so that the protrusion 33 It is also possible to adopt a configuration that does not make physical contact with each other. In addition, a protrusion for a terminal floor detection switch installed in an existing elevator can be used.

Embodiment 7
FIG. 17 shows a configuration diagram of an elevator apparatus according to Embodiment 7 of the present invention. The controller 36 detects the position of the car 3 from the information of the encoder installed in the speed governor 14 and operates the actuator 37 based on the position information of the car 3. Specifically, the actuator 37 is operated in such a direction that the spring force of the spring 17 is weakened when the car 3 is in the vicinity of the lowermost floor, and in the direction in which the spring force of the spring 17 is increased when the car 3 is not in the vicinity of the lowermost floor. To do.

As a result, the speed at which the car 3 collides with the car shock absorber 10 in the vicinity of the lowest floor can be reduced, so that a small car shock absorber 10 can be applied and the vertical dimension of the hoistway 1 can be shortened. It becomes. Further, when the car 3 is in a place other than the vicinity of the lowest floor, the difference in acceleration between the governor rope 12 and the car 3 necessary for the operation of the safety device 13 becomes large, so that the hoisting machine 8 It is possible to reduce malfunctions of the emergency stop device 13 due to the braking operation due to or the car swaying by the passengers inside the car 3. Furthermore, since no roller or gear is required, an emergency stop device can be realized with a simple structure. Moreover, it is also possible to operate the actuator 37 using the information currently used for control with the existing elevator, and the structure of the emergency stop device 13 can also be simplified.

As a car position detection sensor, a plate-like sensor provided in the hoistway is detected by a photoelectric sensor on the car, an altitude sensor is used to measure altitude changes, and an ultrasonic sensor, laser sensor, camera, etc. The actuator 37 may measure the distance to the device, and the actuator 37 may be an electric signal such as a combination of a motor and a ball screw or a timing belt, a magnetic force such as a solenoid, a liquid pressure or a gas pressure. Any device can be used as long as the position and force can be changed accordingly.

The position of the actuator 37 at the time of a power failure or when a signal cannot be received is designed so that the spring force becomes the weakest value, so that the emergency stop device can be reliably operated near the lower floor even in an emergency. .

Further, as shown in the second and third embodiments, the position of the brake element 21 of the wedge-shaped body 15 before the operation of the emergency stop device may be changed by the operation of the actuator 37.

In addition, although the 1: 1 roping and 2: 1 roping elevator devices have been described with respect to the above embodiment, the present invention is not limited to this, and the present invention is also applicable to, for example, a machine room-less elevator without the machine room 2. it can.

3 Car 12 Governor rope 13 Emergency stop device 15 Wedge-like body 17 Spring 21 Brake

Claims

Equipped with an emergency stop device for emergency stop of the lifting body,
The emergency stop device is a wedge-shaped body that makes an emergency stop of the lifting body by causing the brake to be lifted by a lifting distance and being pressed against the guide rail when an acceleration difference between the lifting body and the governor rope occurs.
A spring having a pressing force in a direction to prevent lifting of the brake,
An elevator apparatus comprising: an emergency stop time adjustment unit that shortens the time required for the emergency stop by changing a position of an emergency stop time adjustment end when the lifting body is in the vicinity of the lowest floor
The emergency stop time adjustment end is one end of a spring;
The elevator apparatus according to claim 1, wherein the emergency stop time adjusting unit reduces the pressing force of the spring when the lifting body is in the vicinity of the lowest floor.
The emergency stop time adjustment end is a brake,
The elevator apparatus according to claim 1, wherein the lifting distance is shortened when the lifting body is in the vicinity of the lowest floor.
The emergency stop time adjustment unit
A roller that contacts the guide rail and rotates with the vertical movement of the lifting body;
The elevator apparatus according to any one of claims 1 to 3, further comprising a motion conversion unit that is connected to the emergency stop time adjustment end and converts a rotational motion of the roller into a linear motion.
The emergency stop time adjustment unit
A roller that contacts the guide rail and rotates with the vertical movement of the lifting body;
A cam that rotates by the rotational movement of the roller,
The elevator apparatus according to any one of claims 1 to 3, wherein a position of the emergency stop time adjustment end is changed by rotation of the cam.
The emergency stop time adjustment unit
A suspension wheel that is wound around a suspension body that suspends the lifting body and rotates with the vertical movement of the lifting body;
The elevator apparatus according to any one of claims 1 to 3, further comprising a motion conversion unit that is connected to the emergency stop time adjustment end and converts a rotational motion of the suspension wheel into a linear motion.
The emergency stop time adjustment unit
A suspension wheel that is wound around a suspension body that suspends the lifting body and rotates with the vertical movement of the lifting body;
A cam that rotates by the rotational movement of the suspension wheel,
The elevator apparatus according to any one of claims 1 to 3, wherein a position of the emergency stop time adjustment end is changed by rotation of the cam.
Protrusion near the bottom floor of the hoistway,
The emergency stop time adjustment section
The elevator apparatus according to any one of claims 1 to 3, further comprising a link that is connected to the emergency stop time adjustment end and rotates by hitting the protrusion.
The emergency stop time adjustment unit
A controller for detecting the vertical position of the lifting body;
The elevator apparatus according to any one of claims 1 to 3, further comprising an actuator that changes a position of the emergency stop time adjustment end based on information of the controller.
The emergency stop time adjustment unit
Reduce the time required for the emergency stop when the lifting body is near the lowest floor,
The elevator apparatus according to any one of claims 1 to 9, wherein the time required for the emergency stop is not changed when the lifting body is located at a position other than the vicinity of the lowest floor.