WO2019097635A1

WO2019097635A1 - Safety device and elevator comprising same

Info

Publication number: WO2019097635A1
Application number: PCT/JP2017/041297
Authority: WO
Inventors: 福田　敏行; 洋輔久保
Original assignee: 株式会社日立製作所
Priority date: 2017-11-16
Filing date: 2017-11-16
Publication date: 2019-05-23
Also published as: CN111278758A; JPWO2019097635A1; JP6834022B2

Abstract

Provided is an elevator safety device that allows a wedge to be moved using a comparatively simple configuration. An elevator safety device is a safety device that grips a guide rail by engaging a wedge and an emergency stop device and stops a passenger car when the passenger car movement reaches an abnormal speed, and is characterized by comprising an abnormal speed detection device that detects abnormal passenger car speeds, a drive shaft that is linked to the wedge, an actuator that applies a driving force to the drive shaft, and a spring that applies a biasing force to the drive shaft, and in that the wedge and the emergency stop device oppose the biasing force of the spring and are in a non-engaged state by way of the driving force of the actuator when the passenger car is moving at less than the abnormal speed, and the guide rails are gripped with the wedge and emergency stop device in an engaged state by way of the biasing force applied by the spring and loss of current to the actuator when the passenger car reaches the abnormal speed.

Description

Safety device and elevator equipped with it

The present invention relates to a safety device that performs an emergency stop when a car reaches an abnormal speed, and an elevator equipped with the same.

As background art of this technical field, there is patent documents 1. According to claim 1 of this patent document, “an emergency stop device provided on the elevating body and generating a braking force on the elevating body by rotation around the actuating shaft, and an emergency stop device provided on the elevating body An elevator safety device is described that includes an assist motor that generates a torque for returning and a power transmission unit that transmits the torque generated by the assist motor to the actuating shaft.

Unexamined-Japanese-Patent No. 2012-148883

However, the elevator emergency stop device (safety device) described in Patent Document 1 uses an assist motor as a means for generating a torque for returning the emergency stop device, and utilizes a power transmission means such as a gear. It has a structure to return the emergency stop device. Therefore, in order to operate the safety gear, a device separate from the assist motor, for example, a governor, a governor rope, and a grasping device thereof are required, which raises the problem of an increase in the cost of the elevator.

Then, an object of this invention is to provide the safety device of the elevator which can operate | move and return an emergency stop apparatus easily by comparatively easy structure, without using a governor.

In order to solve the above problems, the safety device of the present invention engages the wedge and the safety gear when the vertical movement of the car reaches an abnormal speed, and grips the guide rail to stop the car. An abnormal speed detection device for detecting an abnormal speed of the car, a drive shaft interlocking with the wedge, an actuator for applying a drive force to the drive shaft, and a spring for applying an urging force to the drive shaft; When the car is below the abnormal speed, the wedge and the safety gear are disengaged against the biasing force of the spring by the driving force of the actuator, and the riding When the car reaches an abnormal speed, the actuator is discharged, and the biasing force of the spring brings the wedge and the safety gear into engagement with each other. Was assumed to grip the rail.

According to the present invention, it is possible to provide an elevator safety device capable of operating and easily returning the safety gear with a relatively simple configuration that does not use a speed governor or the like.

FIG. 2 is a schematic configuration view showing a steady state of the safety device of the first embodiment. FIG. 2 is a schematic configuration view showing a power failure state of the safety device of the first embodiment. FIG. 8 is a schematic configuration view showing a steady state of the safety device of the second embodiment. FIG. 7 is a schematic configuration view showing a power failure state of the safety device of the second embodiment. BRIEF DESCRIPTION OF THE DRAWINGS The schematic block diagram which shows the elevator of this invention.

Hereinafter, embodiments of the present invention will be described based on the drawings.

First, the general structure of the elevator of the present invention will be outlined using the schematic configuration diagram of FIG. As shown in FIG. 5, the elevator of the present invention includes a car 1, a counterweight 40, a main rope 50, a traction sheave 60, a guide rail 70, and a safety device 80.

The car 1 installed in the hoistway 110 of the building 100 has a plurality of guide devices (not shown), and is slidably engaged with the guide rail 70. Therefore, the car 1 is guided by the guide rails 70 to ascend and descend in the hoistway 110.

The car 1 and the counterweight 40 are suspended from the main rope 50. The traction sheave 60 is disposed in a machine room 120 provided in the building 100. A main rope 50 is wound around the traction sheave 60. Further, in the machine room 120, a driving device (not shown) for driving and braking the traction sheave 60 is disposed. The drive device frictionally drives the main rope 50 by rotating the traction sheave 60 to raise and lower the car 1 and the counterweight 40.

The safety device 80 is separately installed at the upper part and the lower part of the car 1, and when the lifting speed of the car 1 reaches an abnormal speed, the guide rail 70 is gripped in an emergency to move the car 1 up and down. Give a braking force to

Next, the safety device 80 of the first embodiment will be described while comparing the steady state and the abnormal state with reference to the schematic configuration diagrams of FIGS. 1 and 2.

FIG. 1 shows the main configuration of a safety device 80 installed at the top of the car 1. As shown here, the battery 2 is mounted on the ceiling of the car 1 and the actuator 3 driven by the battery 2 is supported. A motor or a solenoid may be used as a power source of the actuator 3, but in order to miniaturize the actuator 3, it is preferable to use a motor.

A gear 4 is coupled to the rotation shaft of the actuator 3. A drive shaft 5 having teeth meshing with the gear 4 is supported on the ceiling of the car 1 so as to move up and down, and is biased upward by a spring 6.

The drive shaft 5 extends to the lower side of the car 1 and one end of a V-shaped lever 7 is connected to the lower end of the drive shaft 5. The V-shaped lever 7 is a lever whose angle on two sides is fixed, and the rotational direction is freely supported by a rotating shaft 7A provided below the car 1.

Also, a linear lever 8 is provided at the lower part of the car 1, and the other end of the V-shaped lever 7 and one end of the lever 8 are connected by a link 9. Thus, the lever 8 interlocks with the V-shaped lever 7, and the rotational direction is freely supported by the rotation shaft 8 A provided at the lower part of the car 1.

Further, the upper end of the pull-up rod 10a is connected to the other end of the V-shaped lever 7, and the wedge 11a is connected to the lower end thereof. The pull-up rod 10a passes through an emergency stop device 12a supported and fixed to the lower part of the car 1, and its lower end is fixed to the wedge 11a.

Similarly, the upper end portion of the pull-up rod 10b is connected to the other end of the lever 8, and the wedge 11b is connected to the lower end portion thereof. The pull-up rod 10b passes through an emergency stop device 12b supported and fixed to the lower part of the car 1, and its lower end is fixed to the wedge 11b.

As can be understood from the above description, the biasing force of the spring 6 is transmitted to the

wedges

11a and 11b via a link device such as the drive shaft 5, the V-shaped lever 7, the lever 8, the link 9, and the

pulling rods

10a and 10b. Therefore, the

wedges

11a and 11b are always biased upward.

However, in the steady state shown in FIG. 1, when the actuator 3 rotates counterclockwise as shown by the arrow, the gear 4 of the actuator 3 acts on the teeth of the drive shaft 5 and drives against the biasing force of the spring 6. In order to push the shaft 5 downward, the

wedges

11a, 11b and the

safety devices

12a, 12b are kept in the non-engaged state.

Next, the operation of the safety device 80 when the elevator speed of the car 1 has reached the abnormal speed will be described using FIG.

When the abnormal speed detection device 16 installed in the machine room 120 or the like detects that the elevation of the car 1 has reached the abnormal speed (for example, 1.3 times the rated speed), the power supply to the actuator 3 is stopped. , Electrically discharged.

When the actuator 3 loses power, the force for holding the drive shaft 5 in the lower position against the spring 6 disappears, so the drive shaft 5 is pulled up by the restoring force of the spring 6 as shown in FIG. As a result, the V-shaped lever 7 rotates clockwise about the rotation shaft 7A, and as a result of pulling up the pull-up rod 10a connected to the V-shaped lever 7, the wedge 11a is pulled up and engaged with the safety gear 12a. Match.

Further, the clockwise rotation of the V-shaped lever 7 is transmitted to the lever 8 by the link 9 and causes the lever 8 to rotate counterclockwise around the rotation shaft 8A. As a result, the wedge 11b engages with the safety gear 12b as a result of the pull-up rod 10b being pulled upward.

Thus, when the car 1 reaches an abnormal speed, the safety device 80 can grip the guide rail 70 by engagement between the wedge 11 and the safety gear 12, and a braking force is applied to the car 1. As a result, the car 1 is stopped.

On the other hand, when returning from the state of FIG. 2, the power is supplied to the actuator 3, the gear 4 is rotated in the direction of the arrow of FIG. Since the stopper 12 can be disengaged, the gripping of the guide rail 70 by the safety device 80 can be released.

The operation of returning from FIG. 2 to FIG. 1 will be described in detail. The V-shaped lever 7 is rotated counterclockwise around the rotation shaft 7A, and as a result of pushing down the pull-up rod 10a connected to the V-shaped lever 7, the wedge 11a is released from the safety gear 12a. Further, the counterclockwise rotation of the V-shaped lever 7 is transmitted to the lever 8 by the link 9 and causes the lever 8 to rotate clockwise around the rotation shaft 8A. For this reason, the pull-up rod 10b is pushed down, the wedge 11b is released from the safety gear 12b, and the state shown in FIG. 1 is obtained again.

In the configuration of the present embodiment, since the actuator 3 includes the battery 2, the actuator 3 can be operated even when the commercial power supply is in a power failure state, so the stopped car 1 can be moved. It is possible to return to the nearest floor and perform rescue work etc. by moving it to the nearest floor.

The embodiments described above show the basic configuration, and the present invention is not limited to the configuration shown in the drawings. In any case, a link device is provided that is pulled up so that the

wedges

11a, 11b are engaged with the

safety gear

12a, 12b by the spring 6, and in the steady state, the actuator 3 The

wedges

11a and 11b are held in a non-engaged state from the

locking devices

12a and 12b, while the actuator 3 is discharged when the abnormal speed detection device 16 detects an abnormal speed of the car 1, and the link device is operated by the spring 6. The

wedges

11a, 11b are to be pulled up to engage with the

safety devices

12a, 12b via.

According to such a configuration, since the

wedges

11a and 11b are biased in the pull-up direction by the spring 6, the

wedges

11a and 11b can be operated using a spring force with a simple configuration. Further, since it is not necessary to engage the

safety gear

12a, 12b and the

wedges

11a, 11b via the conventional governor rope, the on-site installation work using the governor rope becomes unnecessary. , Can simplify the work.

In the present embodiment, the actuator 3 is installed at the top of the car 1 and the battery 2 for driving the actuator 3 at the time of a power failure is provided at the top of the car 1. According to such a configuration, even if the actuator 3 or the battery 2 breaks down, the operator can easily recover or replace parts by accessing the upper part of the car 1 and improve the reliability.

According to the elevator safety device of the present embodiment described above, since the wedge is urged in the pull-up direction by the spring, the wedge can be operated using a spring force with a simple configuration. . In addition, since it is not necessary to engage the safety gear and the wedge via the conventional governor rope, the field installation work using the governor rope becomes unnecessary and the work is simplified. can do.

Next, the steady state and the abnormal state of the safety device 80 for an elevator according to the second embodiment will be described with reference to schematic configuration diagrams of FIGS. 3 and 4.

FIG. 3 shows the main configuration of the safety device 80 installed at the lower part of the car 1, and as shown here, this embodiment arranges the actuator 3, the gear 4 and the battery 2 at the lower part of the car 1. It is an example. The other configuration is the same as that of the first embodiment described above, and thus the description thereof is omitted.

When the actuator 3, the gear 4 and the battery 2 are disposed at the lower part of the car 1 as described above, the height of the upper side of the car 1 can be reduced, and the height of the hoistway overhead can be shortened.

The present invention is not limited to the embodiments described above, and includes various modifications. For example, the embodiments described above are described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described. Further, part of the configuration of the embodiment can be replaced with the configuration of the other embodiment.

1 Car, 2 Batteries, 3 Actuators, 4 Gears, 5 Drive Shafts, 6 Springs, 7 V-Lever, 8 Lever, 7A, 8A Rotatable Shaft, 9 Links, 10, 10a, 10b Pull-Up Bars, 11, 11a,

11b Wedge

12, 12a, 12b Emergency stop device, 16 abnormal speed detection device, 40 balance weight, 50 main rope, 60 traction sheave, 70 guide rail, 80 safety device, 100 building, 110 hoistway,
120 machine room

Claims

A safety device for engaging a wedge and an emergency stop device to grip a guide rail and stopping the car when the vertical movement of the car reaches an abnormal speed,
An abnormal speed detection device for detecting an abnormal speed of the car;
A drive shaft associated with the wedge;
An actuator for applying a driving force to the drive shaft;
A spring for applying a biasing force to the drive shaft;
Equipped with
When the car is less than the abnormal speed, the wedge and the safety gear are disengaged against the biasing force of the spring by the driving force of the actuator.
When the car reaches an abnormal speed, the actuator is discharged, and the biasing force of the spring brings the wedge and the safety gear into engagement to hold the guide rail. Elevator safety equipment.
An elevator safety device that pulls the wedge up and engages the safety gear to stop the car when the car reaches an abnormal speed,
Providing a linkage biased in a pulling direction to cause the wedge to engage the safety gear by a spring;
In steady state, the actuator is pulled down from the safety gear against the spring into the disengaged state to hold the wedge;
On the other hand, when the car reaches an abnormal speed, the actuator is discharged, and the spring pulls up the wedge through the link device to bring it into engagement with the emergency stop device. Elevator safety features.
The elevator safety device according to claim 1, further comprising a battery for driving the actuator.
The elevator safety device according to claim 3, wherein the actuator and the battery are installed at an upper portion of the car.
The elevator safety device according to claim 3, wherein the actuator and the battery are installed at a lower part of the car.
The rides installed in the hoistway,
Balance weight,
A main rope on which the car and the counterweight are suspended;
A traction sheave around which the main rope is wound;
A drive for braking the traction sheave;
A guide rail for guiding raising and lowering of the car;
An elevator provided with the safety device according to claim 1 or 2.