JP4104911B2 - Elevator safety device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an elevator safety device, and more particularly to a multi-car elevator safety device having a plurality of cars in a hoistway.
[0002]
[Prior art]
Usually, in a multi-car type elevator having a plurality of cars in a hoistway, an elevator safety device for preventing collision between cars or reducing impact at the time of collision is disclosed in, for example, Japanese Patent Laid-Open No. 7-157243. Some use the repulsive force of permanent magnets.
[0003]
FIG. 5 is a side view showing a conventional elevator safety device described in the above publication.
In FIG. 5, the elevator is a hoistway 1, a car 2A, a car 2B, a permanent magnet N pole 3A and a permanent magnet S pole 3B which are car magnets, a permanent magnet N pole 4A and a permanent magnet S pole which are hoistway bottom magnets. 4B.
[0004]
Here, when the cars approach each other due to an abnormality in the car operation control, the collision is avoided by the repulsive force of the permanent magnets between the cars. In addition, even if a power failure occurs, the rebound of the hoistway bottom magnet and the car magnet reduces the car falling speed and reduces the impact acceleration at the hoistway bottom.
[0005]
[Problems to be solved by the invention]
By the way, in the case of the conventional elevator safety apparatus as described above, an extra magnet or the like for stopping or decelerating the car weight is required, which increases the car weight and is also expensive in cost. There were problems such as.
[0006]
The present invention has been made to solve the above-described problems, and an object thereof is to provide an inexpensive elevator safety device without increasing the weight of a car.
[0007]
[Means for Solving the Problems]
The elevator safety device according to the present invention is a multi-car type elevator having a plurality of cars in a hoistway, and is provided in the plurality of cars, and a push bar that is pushed by the other car when the cars approach each other. And an emergency stop actuating mechanism that is connected to the push bar and operates when the push bar is pushed to stop the movement of the car.
[0008]
In the elevator safety device according to the present invention, the emergency stop actuating mechanism is coupled to a lever that rotates around a fulcrum in synchronization with the vertical movement of the push rod, and the car moves upward. Alternatively, an emergency stop member that stops going downward is provided.
[0009]
Moreover, the safety device for an elevator according to the present invention includes an expansion / contraction mechanism that contracts when the push bar is applied with a force larger than a force that operates the emergency stop member.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
1 to 4 are side views showing an elevator safety device according to Embodiment 1 of the present invention.
In each figure, 11 is a car located in the upper part, 12 is a car located in the lower part, 13 is a rail, 14 is an emergency stop member for stopping the car from going downward, and 15 is a car going upward. An emergency stop member to be stopped. As the emergency stop members 14 and 15, an emergency stop member originally provided on the cars 11 and 12 as a brake for stopping the cars 11 and 12 may be used.
[0011]
Reference numeral 16 denotes a rail contact, 17 a lever for moving the rail contact 16 up and down, 18 a fulcrum of a lever for moving the rail contact 16 up and down, 19 a lever push bar connected to an emergency stop operating mechanism, and 20 A lever for connecting the car frame, the lever push bar 19 and the lever 17, 21 is a fulcrum of the lever, and 22 is a guide for the lever push bar 19. The emergency stop members 14 and 15 and the levers 17 and 20 substantially constitute an emergency stop operating mechanism.
[0012]
FIG. 1 shows a state in which a car 11 located at the upper part and a car 12 located at the lower part are at a normal distance, and an emergency stop member 15 for stopping the cars 11 and 12 from going upward, There are provided an emergency stop member 14 that stops going in the direction and a lever push bar 9 connected to the emergency stop operating mechanism.
[0013]
FIG. 2 is an enlarged view of part A in FIG. 1. The emergency stop member 14, the rail stopper 16 that sandwiches the rail 13 during the emergency stop operation, and the rail stopper 16 centered on the fulcrum 18 fixed to the car A lever 17 that moves up and down, a lever push bar 19, and a fulcrum 21 fixed to the car, rotates around a lever 21 that connects the lever push bar 19 and the frame of the car 11 to the lever 17, and the vertical movement of the lever push bar 19. The guide 22 which guides is shown.
[0014]
FIG. 3 shows a state in which the upper and lower cars approach, the lever push bar 19 is pushed by the car, the lever 17 for moving the rail stopper 16 up and down is pushed up, and the emergency stop members 14 and 15 start to operate. Yes.
[0015]
FIG. 4 shows a state where the car is completely stopped from the state of FIG. The lever push bar 19 has a telescopic mechanism that contracts when a force larger than the force that operates the emergency stop members 14 and 15 is applied. That is, the lever push bar 19 has a spring built therein, not shown, and contracts when a large force is applied to prevent the push bar from being broken.
[0016]
Next, the operation of the elevator safety device according to Embodiment 1 of the present invention will be described.
When the upper car 11 and the lower car 12 shown in FIG. 1 are at a normal distance and the upper car 11 and the lower car 12 approach each other as shown in FIG. 2 is pushed by the other car, and the lever 17 for moving the rail stopper 16 shown in FIG. 2 up and down is pushed up, and the emergency stop members 14 and 15 start to operate. As shown in FIG. 11 is stopped, while the emergency stop member 15 stops the car 12 from going upward, and finally the cars 11 and 12 are completely stopped, and the cars collide with each other. To be prevented.
In this way, in the present embodiment, the emergency stop member originally provided in the car is used as a brake for stopping the car, so that the device can be configured at low cost.
[0017]
In addition, even if there is a stop distance from when the emergency stop member is activated until the car stops completely, the lever push bar has a built-in spring and contracts when a large force is applied, preventing its destruction. .
[0018]
【The invention's effect】
As described above, according to the present invention, in a multi-car system elevator having a plurality of cars in a hoistway, a push that is provided on the plurality of cars and is pushed by the other car when the cars approach each other. Since it has a bar and an emergency stop operating mechanism that is connected to the push bar and operates when the push bar is pushed to stop the movement of the car, an inexpensive elevator can be used without increasing the weight of the car. There is an effect that a safety device is obtained.
[0019]
Further, according to the present invention, the emergency stop operating mechanism is coupled to the lever that rotates around the fulcrum in synchronization with the vertical movement of the push rod, and the car is upward or downward. Since the emergency stop member that stops going is provided, there is an effect that the weight of the car can be reduced and the cost can be reduced.
[0020]
Further, according to the present invention, since the push bar has an expansion / contraction mechanism that contracts when a force larger than the force that operates the emergency stop member is applied, there is a stop distance until the car completely stops, and the push bar Even if it is pushed more than necessary, the push rod can be prevented from being broken.
[Brief description of the drawings]
FIG. 1 is a side view showing a state where an upper car and a lower car are at a normal distance in an elevator safety device according to Embodiment 1 of the present invention;
2 is an enlarged side view showing a portion surrounded by a frame A in FIG.
FIG. 3 is a side view showing an operation start state of an emergency stop member in the elevator safety device according to the embodiment of the present invention.
FIG. 4 is a side view showing a state in which an emergency stop member in the safety device for an elevator according to Embodiment 1 of the present invention is activated and the car is stopped.
FIG. 5 is a side view showing a conventional elevator safety device.
[Explanation of symbols]
11, 12 car, 13 rail, 14, 15 emergency stop member,
16 Gold per rail, 17, 20 lever, 19 lever push rod,
22 Guide.

Claims (3)

In the multi-car elevator with multiple cars in the hoistway,
A push bar provided in the plurality of cars and pushed by the other car when the cars approach each other;
An elevator safety device, comprising: an emergency stop operating mechanism that is connected to the push bar and operates when the push bar is pressed to stop the movement of the car. The emergency stop operating mechanism includes a lever that rotates about a fulcrum in synchronization with the vertical movement of the push rod, and an emergency stop member that is connected to the lever and stops the car from going upward or downward. The elevator safety device according to claim 1, further comprising: The elevator safety device according to claim 1 or 2, wherein the push bar has a telescopic mechanism that contracts when a force larger than a force that operates the emergency stop member is applied.

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