JPH08259155A - Safety device for elevator doorway - Google Patents

Abstract

PURPOSE: To prevent continuous traveling of an elevator after a door is closed even when foreign matter such as a cord like body, etc., is caught by detecting that the foreign matter is caught in the door and stopping the elevator at the time when there is detection output after the elevator starts traveling. CONSTITUTION: In a state where an elevator door 1 and an elevator landing door 11 are totally closed with cord like foreign matter 8 caught is them, as the foreign matter 8 is so soft and thin that a working piece 2 cannot be retreated, each of the doors 1, 11 is totally closed and an elevator 9 starts traveling. Thereafter, when the elevator 9 travels with the cord like foreign matter 8 caught in it, tensile force is applied on the cord like foreign matter 8 and it comes to be in a state to be pulled, the working piece 2 can be made to retreat due to the tensile force of the foreign matter 8. Thereafter, as a switch 3b to detect that the working piece 2 retreats after the elevator 9 travels works, movement of the elevator 9 is controlled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for an elevator door, and more particularly to a safety device for an elevator door capable of preventing foreign matter from being caught in the elevator door.

[0002]

2. Description of the Related Art A conventional safety device for an elevator door of this type is disclosed in Japanese Utility Model Publication No. 63-41415.
The technologies listed in can be mentioned. FIG. 11 is a front view showing a conventional elevator door safety device disclosed in the above publication. In the figure, 1 is an elevator door that opens and closes the entrance and exit of an elevator, 2 is an operating piece arranged in a state of protruding along the edge of the elevator door 1, and 3 is a state in which the operating piece 2 is movable in the backward direction. The parallel link mechanism mounted on the elevator door 1 includes a link 3a for the parallel link mechanism 3, a switch 3b for detecting when the operating piece 2 retracts, and a reference numeral 3c for restricting the forward movement of the operating piece 2 to a predetermined position. The stopper 3d is a movable fulcrum of the link 3a. Reference numeral 4 denotes a rivet that pivotally connects the link 3a to the operating piece 2. 5
Is a sill extending below the entrance of the elevator, 6 is a roller arranged above the elevator door 1, 7 is a rail arranged below the entrance of the elevator, and the roller 6 rolls,
8 is a foreign substance such as a string. The rail 7 and the threshold 5 are fixed to a car 9 of the elevator.

FIG. 12 is a block diagram showing a schematic control for opening and closing an elevator door and driving an elevator. In the figure, 11 outputs an opening / closing command to the door opening / closing device based on the detection output of the detection switch 3b, receives an opening / closing completion signal of the door opening / closing device, and outputs a drive output signal to the hoisting device 13 based on this signal, It is a control device that receives a car position signal from a car position detection device 14 coupled to the hoisting device 13 and outputs an opening / closing command to the door opening / closing device.

Next, the operation will be described. A conventional safety device for an elevator door is constructed as described above, and a pair of parallel link mechanisms 3 are provided at the tip of the elevator door 1.
The operating piece 2 that moves forward and backward is rotatably supported in the upward direction by the operation piece 2. The operating piece 2 stops or reverses the closing operation of the elevator door 1 during opening or full opening of the elevator door 1. A switch 3b is provided. Therefore, when a person or the like touches the operating piece 2 during the closing operation of the elevator door 1, the operating piece 2 retracts and the switch 3b operates, whereby the closing operation of the elevator door 1 is controlled. That is, the operation piece 2 is moved backward by the foreign matter 8 and the elevator door 1 is moved backward toward the door opening side so that the elevator door 1 does not run while holding the foreign matter 8 therebetween. For this reason, the elevator door 1 cannot be fully closed, and the elevator is prevented from traveling with a foreign object in between.
FIG. 13 is a flowchart showing the above operation. In the figure, when the elevator door is fully opened in step S21 and then the door is closed in step S22, the switch 3b detects whether or not the operation piece 2 is pushed in in step S23. If there is an output from the switch 3b, the door is opened in step S24. The reversing door closing is started, and the process returns to step S21 to fully open the elevator door. If there is no output from the switch 3b in step S23, the door is fully closed and the elevator starts in step S25.

[0005]

However, in the conventional safety device for the entrance and exit of an elevator as described above, a soft and thin structure such as a string cannot push the operating piece, and the door is closed as it is to lift the elevator. Will run.
For this reason, for example, the elevator runs while the code of the vacuum cleaner or the chain of the pet that is cleaning the inside of the car straddles the inside of the elevator car and the landing side, which may cause safety problems or damage to the equipment. Conceivable. Further, generally, the operation of the switch 3b is invalidated once the elevator travels. This is to prevent the switch 3b from operating due to vibration or the like when the elevator is running, and to prevent the elevator from performing unnecessary operations.

Therefore, the present invention provides a highly safe entrance / exit of the elevator by preventing the elevator door from closing and the elevator continuing to run even if the foreign matter 8 is a thin string-like object.

[0007]

[Means for Solving the Problems]

An elevator entrance / exit safety device according to the present invention comprises an operating piece movably provided on an elevator door,
The detection means detects that a foreign object is trapped in the door due to the movement of the operation piece, and the control means that controls the operation of the elevator based on the output of the detection means. The elevator is stopped when the output of the detection means is output later.

The control means stops the elevator when the output of the detection means continues for a predetermined time or more after the elevator starts traveling.

Further, it is equipped with a car position detecting means for detecting the position of the car, and the control means calculates the traveling distance of the elevator based on the output of the car position detecting means, and a predetermined range of this traveling distance. Within the above, the elevator is stopped when the output of the detection means is generated.

Further, an operating piece movably provided on the elevator door, a first detecting means which operates by a predetermined first moving amount of the operating piece, and a predetermined first moving piece of the operating piece. The second which operates by the movement amount of 2
Detection means and control means for controlling the operation of the elevator based on the outputs of the first and second detection means, and the control means controls the first detection means while the elevator door is closed. Is output, the elevator door is opened, and the elevator is stopped when the second detection means outputs after the elevator starts traveling.

Further, the control means stops the elevator and then moves it to the departure floor to open the elevator door.

[0013]

In the elevator entrance / exit safety device according to the present invention, the control means prevents the foreign matter from being caught in the door by the movement of the actuating piece movably provided on the elevator door after the elevator starts traveling. When detected, stop elevator.

Further, the control means stops the elevator when the output of the detection means continues for a predetermined time or more after the elevator starts traveling.

Further, the control means calculates the traveling distance of the elevator based on the output of the car position detecting means, and when the output of the detecting means is present within a predetermined range of the traveling distance, the elevator is operated. Stop.

There is an output of the first detection means that the control means operates according to a predetermined first movement amount of the operating piece provided movably on the elevator door while the elevator door is closed. At the time, open the elevator door,
The elevator is stopped when there is an output of the second detection means that operates by a second predetermined movement amount after the elevator starts traveling.

The control means stops the elevator and then moves it to the departure floor to open the elevator door.

[0018]

【Example】

Example 1. An embodiment of the present invention will be described below with reference to FIGS. 1 and 2 are sectional views of the door. The same reference numerals as those in FIG. 11 indicate the same or corresponding portions, and the description thereof will be omitted. In the figure, 10 is an elevator hall, and 11 is an elevator hall door that opens and closes an entrance / exit 12 of the hall 10. FIG. 1 shows a state in which the elevator door 1 and the elevator hall door 11 are fully closed while sandwiching the string-like foreign matter 8. Since the foreign matter 8 is soft and thin, the operating piece 2 cannot be retracted, and the elevator doors 1 and 11 are fully closed, so that the elevator 9 starts traveling. Next, FIG. 2 shows a state in which the elevator 9 runs while sandwiching the string-like foreign matter 8 and the string-like foreign matter 8 is tensioned and pulled.
In this state, the operating piece 2 can be retracted by the tension of the foreign matter 8. Therefore, after traveling the elevator 9, the operating piece 2
The operation of the elevator 9 is controlled by the operation of the switch 3b which detects that the vehicle has moved backward.

FIG. 3 is a flow chart showing the above series of operations. In the figure, steps S21 to S2
Reference numeral 5 is the same as that in FIG. 13 showing the conventional example, and the description is omitted.
In step S26, the elevator door 1 and the elevator hall door 11 are fully closed, and after the elevator 9 has traveled, tension is applied to the foreign matter 8 by the movement of the elevator 9 to retract the operating piece 2 and, as a result, operate the switch 3b. . Next, in step S27, the elevator 9 is driven by the output of the switch 3b.
Stops. Next, if there is no output from the switch 3b in step S26, the process proceeds to step S28, the target floor is reached, and the elevator door is opened in step S29. As described above, even if a foreign substance such as a thin string-like object is prevented, the elevator door is closed and the elevator is kept running,
A highly safe elevator entrance / exit safety device can be obtained.

Example 2. In the first embodiment, as shown in FIG. 3, when the switch 9b is operated while the elevator 9 is traveling in step S26, the elevator 9 is stopped in step S27. In this case, the passenger notifies the outside to rescue the passenger. I will wait. Therefore, in this embodiment, after stopping the elevator 9 at the portion corresponding to step S27 in FIG.
By moving in the opposite direction, the elevator doors 1 and 11 are opened by returning to the state where the elevator 9 starts traveling. FIG. 4 is a flowchart showing the above operation. Steps S31 to S37 and Step S41,
42 is the same as steps S21 to S27 and 28 and 29 in FIG. The elevator is restarted in step S38, the elevator stops at the departure floor in step S39, and then the elevator door is opened in step S40. As described above, passengers are not locked in until waiting for rescue from the outside, and a safer device for the entrance and exit of the elevator can be obtained.

Example 3. In the second embodiment described above, the operation of the elevator 9 is controlled by the operation of the switch 3b while the elevator 9 is traveling, that is, the elevator 9 is stopped or traveling in the opposite direction. However, when the elevator 9 is running, the switch 3b momentarily operates even when the foreign object 8 is not sandwiched by vibrations, impacts of passengers' mischief on the elevator door 1, etc., leading to unnecessary operation of the elevator 9. It is possible. In the present embodiment, in order to prevent this drawback, the operation of the elevator 9 is controlled only when the operation of the switch 3b is continued for a certain time or longer. FIG. 5 is a flow chart showing the operation of this embodiment. Step S5
1 to S56 and steps S59 and 60 are the same as steps S21 to S26 and 28 and 29 in FIG. In step S57, if the operating piece remains pressed for a certain time or longer (for example, 1 second or longer), the elevator is stopped in step S58. If the operation piece is not pushed in continuously for a certain time or longer in step S57, the process proceeds to step S59. As described above, a safe and reliable elevator entrance / exit safety device without wasteful operation can be obtained.

Example 4. FIG. 6 shows a fourth embodiment in which, in addition to the switch 3b which is the first switch for detecting the backward movement of the operating piece 2, a second switch 14 which operates only when the operating piece 2 is largely retracted is provided. Is. As described above, the operating piece 2 needs to be set so that the switch 3b operates by retracting the operating piece as little as possible in order to prevent the elevator door 1 from colliding with a person or thing. Therefore, as described above, the switch 3b is affected by the vibration during the traveling of the elevator 9.
May operate, resulting in unnecessary operation of the elevator 9. Therefore, the second switch 14 is provided to control the operation of the elevator 9 only when the second switch 14 is operated. FIG. 7 shows an example of the movement amount when the operating piece 2 retracts. The operating position of the switch 3b, which is the first switch, is 20 mm from the position before the operating piece 2 is actuated. The moving position of the second switch 14 is relatively large when the operating piece 2 retracts due to the tension of the foreign matter 8. Therefore, the moving position of the second switch 14 is relatively large.
It was further 20 mm from the operating position of b, and this was the second movement amount.

FIG. 8 is a control block diagram in which a second detection switch 14 is added to FIG. 12 showing a conventional example. FIG. 9 is a flowchart showing the series of operations described above. In the figure, the steps other than steps S73 and S76 are the same as those of the first embodiment shown in FIG. A step S73 detects whether or not the operating piece 2 has been pushed in to reach the first movement amount, based on whether or not the switch 3b, which is the first switch, operates, and in a step S76, the operating piece 2 is pushed in to cause the second movement. Whether or not the movement amount has been reached is detected by whether or not the second switch 14 operates.
As described above, by providing the switch 14 that operates only when the operating piece 2 retreats a lot and controlling the operation of the elevator 9 when operating, a reliable and safe elevator entrance / exit safety device with no wasteful operation is obtained. To be

Example 5. In the third embodiment, the operation of the elevator is controlled only when the operation of the switch 3b is continued for a certain time or longer so that the elevator 9 is not unnecessarily stopped by the unnecessary operation of the switch 3b. In the embodiment, after the elevator 9 has traveled, the elevator 9 is stopped or traveled in the opposite direction only when the switch 3b operates within a certain distance. The foreign matter 8 such as a string starts to be tensioned within a certain distance when the elevator door 1 is fully closed and travels, that is, within a certain distance from the landing level, and the traveling of the elevator beyond that causes disconnection of the foreign matter and equipment It may be damaged.

FIG. 10 is a flowchart showing the above operation. 5 of the third embodiment except step S87.
The description is omitted because it is the same. In step S87, the traveling distance after the traveling of the elevator is started is calculated based on the output of the encoder that is connected to the hoisting device and detects the position of the car. If so, the process proceeds to step S88 and the elevator is stopped. If the elevator is not within the predetermined distance from the departure floor in step 87, the process proceeds to step S89.
This predetermined distance is ± 2 m, for example. As described above, the operation of the elevator 9 is controlled when the operating piece 2 is retracted due to the tension applied before the foreign matter 8 is cut,
If the operation of the switch 3b is monitored only within a certain distance after the elevator 9 has traveled, the elevator 9 is not stopped by an unnecessary operation of the switch 3b due to vibrations in other areas, so that the elevator 9 is highly reliable and safe. A safety device for the entrance and exit of the elevator is obtained.

[0026]

As described above, according to the present invention, the operating piece movably provided on the elevator door, and the detecting means for detecting that a foreign object is caught in the door due to the movement of the operating piece, The control means for controlling the operation of the elevator based on the output of the detection means, and this control means, when the output of the detection means after the elevator starts traveling, stops the elevator, so that the thin string-like body Even if a foreign object is caught, the elevator door is prevented from closing and the elevator is prevented from continuing to travel, and a safety device for the entrance and exit of the elevator with high safety can be obtained.

Further, since the control means stops the elevator when the output of the detection means continues for a predetermined time or more after the elevator starts traveling, a safe and highly reliable safety device for the entrance / exit of the elevator without malfunction can be obtained. To be

Further, the car position detecting means for detecting the position of the car is provided, and the control means calculates the traveling distance of the elevator based on the output of the car position detecting means, and within the predetermined range of this traveling distance. Since the elevator is stopped when the output of the detection means is output, a safe and highly reliable elevator entrance / exit safety device without malfunction can be obtained.

Further, an operating piece movably provided on the elevator door, a first detecting means which operates by a predetermined first moving amount of the operating piece, and a second predetermined piece of the operating piece. A second detecting means that operates according to the moving amount of the elevator, and a control means that controls the operation of the elevator based on the outputs of the first and second detecting means. When there is an output of the first detection means, the elevator door is opened, and when there is an output of the second detection means after the elevator has started traveling, the elevator is stopped, so there is no malfunction, and reliability is high. A safety device for a safe elevator doorway is obtained.

Since the control means stops the elevator and then moves to the departure floor to open the elevator door,
Passengers are not locked in until they are rescued from the outside, providing a safer elevator doorway.

[Brief description of drawings]

FIG. 1 is a sectional view showing a door according to a first embodiment of the present invention when the door is fully closed.

FIG. 2 is a cross-sectional view showing when the elevator travels in the state of FIG.

FIG. 3 is an operation flowchart showing the first embodiment of the elevator entrance / exit safety device according to the present invention.

FIG. 4 is a flowchart showing the operation of the second embodiment according to the present invention.

FIG. 5 is a flow chart showing the operation of the third embodiment according to the present invention.

FIG. 6 is a front view showing a safety device for an elevator doorway according to a fourth embodiment of the present invention.

FIG. 7 is a diagram showing a movement amount of the operation piece of FIG.

FIG. 8 is a control block diagram of a fourth embodiment according to the present invention.

FIG. 9 is a flowchart showing the operation of the fourth embodiment according to the present invention.

FIG. 10 is a flowchart showing the operation of the fifth embodiment according to the present invention.

FIG. 11 is a front view showing a conventional safety device for an entrance / exit of an elevator.

FIG. 12 is a control block diagram of a conventional elevator entrance / exit safety device.

FIG. 13 is a flowchart showing the operation of a conventional elevator entrance / exit safety device.

[Explanation of symbols]

1 elevator doors, 2 actuating pieces, 3b switch, 8
Foreign object, 9 elevator, 10 hall, 14 second switch.

Claims (5)

[Claims] 1. An operating piece movably provided on an elevator door, a detecting means for detecting that a foreign object is caught in the door by the movement of the operating piece, and an elevator based on an output of the detecting means. A safety device for an elevator entrance / exit, comprising: a control means for controlling the operation, wherein the control means stops the elevator when an output of the detection means is provided after the elevator starts traveling. 2. The elevator entrance / exit safety device according to claim 1, wherein the control means stops the elevator when the output of the detection means continues for a predetermined time or more after the elevator starts traveling. 3. A car position detecting means for detecting the position of the car is provided, and the control means calculates a traveling distance of the elevator based on an output of the car position detecting means, and a predetermined range of the traveling distance. The safety device for an entrance / exit of an elevator according to claim 1, wherein the elevator is stopped when the output of the detection means is output. 4. An operating piece movably provided on the elevator door, a first detecting means which operates by a predetermined first moving amount of the operating piece, and a predetermined first moving piece of the operating piece. The second detection means that operates according to the movement amount of 2 and the control means that controls the operation of the elevator based on the outputs of the first and second detection means, and the control means includes the door of the elevator door. When there is an output of the first detection means during closing, open the elevator door,
A safety device for an elevator entrance / exit, wherein the elevator is stopped when an output of the second detection means is provided after the elevator starts traveling. 5. The elevator entrance / exit safety device according to claim 1, wherein the control means stops the elevator and then moves it to the departure floor to open the elevator door. .