JPS6047196B2 - Protection device for automatic doors for elevator cars - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a protection device for an automatic door for an elevator car.

In general, automatic doors for elevator cars, etc., have a switch activation piece in the atrium to confirm that the door is closed, and a door close confirmation switch is installed in the car. A safety circuit is provided so that the elevator cannot run unless it is turned on.

Conventionally, in such automatic doors, when an occupant intentionally opens the door while the elevator is running, a door closing circuit is formed by rotating the drive pulley before the door closing confirmation switch is turned off. An automatic door protection device is provided which applies a closing force to the door and prevents the door from opening to the OFF position of the door closing confirmation switch.

An automatic door protection device previously proposed in Japanese Patent Application Laid-Open No. 50-131247 is shown in FIGS. 1 and 2.

That is, the door 1 is suspended from a hanging wheel 3 that rolls on the upper part of the rail 2, and the lower part is guided by the door guide 5 that slides and fits into the groove of the sill 4 to open and close from side to side. There is.

Further, the door drive motor 6 transmits power to the drive pulley 8 via the chain 7 to rotate the drive pulley 8. A fulcrum 10 of a cam link 9 is coaxially provided on this drive pulley IJ8, one end of this cam link 9 is connected to one end of a connecting link 11 at a fulcrum 12, and the other end of this connecting link 11 is connected to a fulcrum 12 of a main lever 13. It is connected to the intermediate portion by a fulcrum 14. One end of this main lever 13 is connected to a fulcrum 16 fixed to the car 15, and the other end is connected to a link 1.
It is connected to one end of 7 at a fulcrum 18. The other end of this link 17 is connected to the door 1 at a fulcrum 19. Further, a protection device indicated by A in FIG. 1 is connected to the other end of the cam link 9.

This protection device will be explained with reference to FIG. That is, a V-shaped groove 20 is formed at the other end of the cam link 9, and a roller 21 pressed with a constant pressure is inserted into this groove 20.
are fitted. This roller 21 is connected to a leaf spring 2 fixed to the drive pulley 8 via a leaf spring support 22.
3 via a roller stand 24 and a roller shaft 25, and this leaf spring 23 is pressed in the direction of the cam link 9 by a compression spring 26. This compression spring 26 is
It is attached to a compression spring support 27 fixed to the drive pulley 8 via a spring pressure adjustment bolt 28 and a spring pressure adjustment plate 29. Further, a limit switch 30 is fixed to the drive pulley 8 so as to face the lower end of the leaf spring 23. In such conventional automatic door protection devices, the cam link 9 and drive pulley 8 are
The plate spring 23 and the compression spring 26 are connected in the range of spring pressure, and unless a force exceeding the spring pressure is applied as when opening and closing the door 1, the engaged state shown in FIG. 1 is maintained. is maintained.

When a force greater than the normal door opening/closing force acts on the door 1, the roller 21 rolls in the groove 20 of the cam link 9 and the leaf spring 23
The limit switch 30 is activated by deforming the door 1, and the door 1 is stopped or stopped and moved backward.

Here, stopping and reversing means that the door opens when the door is closed, and closes when the door opens. In this way, the accident of getting caught during the opening operation of the door can be alleviated to a slight degree, and the accident of collision with the door during the operation of closing the door can also be alleviated to a slight degree. By the way, generally, the door 1 has a switch actuation piece 3.
1 is fixed, and the car 15 has a door close confirmation switch 3.
2 is provided, and when the door 1 closes during the closing operation of the door 1, the switch actuating piece 31 activates the door closing confirmation switch 3.
Turn 2 to 0N and confirm that door 1 is closed to confirm that the elevator can go up and down. The door drive motor power cut switch coaxially provided on the drive pulley 8 is turned off to stop the door drive motor and complete the door closing operation.

That is, in a general automatic door, door closing control is performed such that the door driving motor 6 is stopped after the door closing confirmation switch 32 is turned ON. In addition, when an occupant intentionally opens the door position in the opening direction while the elevator is running, the drive pulley 8, which is attached coaxially with the drive pulley 8, rotates in synchronization with the door 1. By setting the door drive motor power cut switch to 0N, the door drive motor 6 is driven to apply a driving force in the closing direction to the door 1, so that the door closing confirmation switch 32 does not turn off, that is, the elevator does not stop. is considered.

However, in such conventional automatic door protection devices, the door drive motor 6 and drive pulley 1-1J8 have large inertia, so if you intentionally apply a force in the direction of opening the door 1 while it is closed, , the roller 21 rolls on the surface of the groove 20 of the cam link 9 to move the door 1 and drive the drive pulley 8.
Therefore, the door closing confirmation switch 3 is not synchronized with the rotation of the door drive motor power supply switch 3 before it turns 0N.
2 turns OFF, and if the elevator is running, the elevator will stop due to the OFF operation of the door closing confirmation switch 32, and the occupants will be trapped inside the car 15.

The present invention was made in order to eliminate the above-mentioned conventional drawbacks, and an object of the present invention is to provide a protection device for an automatic door for an elevator car, which can prevent an elevator stop accident while the elevator is running.

The present invention is applicable to a door that is installed at an entrance and exit and is equipped with a drive device for automatically opening and closing, and when a drive force greater than the normal door opening force is generated from the door drive device during or during the opening operation of the door. In an automatic door protection device that is equipped with a control device that detects the generation of this driving force and has the function of stopping or reversing the opening operation of the door, a driving force is applied to the door in the closing direction while the door is closing. There are some things I keep.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 3 is an explanatory diagram showing an embodiment of the protection device for an automatic door for an elevator car according to the present invention. In this embodiment, the protection device for the conventional automatic door shown in FIGS. Members that have the same functions as those in the apparatus are designated by the same reference numerals, and a description thereof will be omitted.

That is, in this embodiment, there are raised locking portions 4 at both end portions of the groove portion 20 provided in the cam link 10.
0 is set. Further, the door drive motor 6 is always energized while the door is closed, and always applies a driving force to the door 1 in the closing direction. That is, according to this embodiment, when the door 1 is closed, the drive pulley 8 is always given a rotational force in the direction of rotation shown by the arrow in FIG. The leaf spring 23 that is
1 is brought into contact with the locking portion 40 of the cam link 9, thereby applying a counterclockwise rotational force to the cam link 9. This rotational force applied to the cam link 9 applies a force in the closing direction to the door 1 via the connecting link 11, the main lever 13, and the link 17.
Therefore, even if a passenger tries to open the door 1 intentionally, the door cannot be opened unless a large force is applied that exceeds the force applied to the door 1 in the closing direction. Even if a passenger tries to forcefully open the door 1 from inside the elevator 15, the door 1 cannot be opened, and the elevator is not stopped, thereby preventing the passenger from getting stuck in an accident. Note that while door 1 is closed, door 1
If the force applied to the drive pulley 8 is excessive and exceeds the deformation force of the variable devices such as the leaf spring 23 and the compression spring 26 via the cam link 9 etc. and activates the limit switch 30, the drive pulley 8 It is necessary to set the limit switch 30 to be in a non-operating state at or near the end position of the closing operation of the door 1 through the rotation of the door 1.

Next, the control circuit in the above embodiment will be explained with reference to FIG.

In the figure, A and F are the armature and field winding of the door drive motor (DC shunt motor), respectively, and FR is the field resistor.

C is the contactor coil that is energized when a closing command is issued, O
is the contactor coil that is energized when an opening command is issued, and C
l, C2 and 01,02 are normally open contacts with each. 0LS is an open limit switch that stops the door drive motor when the door is fully opened, SRl and SR2 are series resistors connected between armature A and the positive power supply and negative power supply, respectively, and PRl and PR2 are the armature resistors, respectively. A
These resistors SR are connected in parallel with
1, SR2, PR1, and PR2 are for controlling the speed of the door drive motor.

0RS is a switch that turns on when a force greater than the normal opening/closing force is applied to the door, 0R is the contactor coil that is excited when 0RS turns 0N, 0R-1 is 0R normally open, 0R-2 is normally closed,
0R-3 is a normally closed contact, 0R-4 is a normally open contact, and CS is 0 at the end position or just before the end of the door closing operation according to the present invention.
Switch to FF, 0E means the door is open and 0LS is 0FF.
0E-1 in the contactor coil, which is de-energized when
is a normally closed contact of 0E.

DS is a switch installed on the floor side that turns OFF when the floor door is closed. ER is a switch that is ON while the elevator is running and turns OFF when the elevator stops. SS is a door safety switch that is active when the door is closed. ), DC is the contactor coil for door close command, DC-1 is DC normally open, DC-2
indicates a normally closed contact, and X-1 and X-2 indicate normally open and normally closed contacts of a contactor coil (not shown) for door closing auxiliary command, respectively. Next, the operation when opening the door will be explained.

First, when the elevator arrives at a certain floor, a door opening command is issued, contactor 0 is energized (not shown), and its contact 01,
02 is closed, and as a result, current flows through the armature A through the circuit 01-A-02, and the door drive motor is activated.
At this time, switches 0S1 to 0S3 are open. When the door opens slightly after the motor starts, the switch 0S1 closes and the resistance value of the series resistor SR2 decreases, so that the door opening speed is accelerated. When the door opens about half of the way, switch 0
S2 is closed, the armature current is shunted to the parallel resistor PR2, regenerative braking is applied to the motor, and the door opening speed begins to slow down. Next, when the door opens near the end of the entire stroke, the switch 0S3 closes, the deceleration becomes even stronger, and when the end is reached, the open limit switch 0LS opens,
Stops the motor and cuts off the door opening command. At the same time, contactor coil 0E is demagnetized 0E-1 is closed. Next, I will explain the operation when closing the door.

First, the contactor coil (not shown) for door closing auxiliary command is energized, the contact X-1 is closed, the contact X-2 is opened, and the contactor coil DC is energized, the contact DC-1 is closed, and the contact DC-2 is opened. The contactor coil C is energized, and its contacts C1 to C3 are closed. This allows C1-A-C
Current flows through the armature A through the circuit No. 2, and the door drive motor starts. At this time, CS1 to CS3 are open. When the door closes after the motor starts, CS1~
CS3 closes, the door accelerates and decelerates, and before or when the door closes, the switch CS opens and the switch 0
Cut the RS function. At this time, the floor door is also closed and the switch DS is opened, which demagnetizes the contactor coil The contact DC-1 is opened, the contact DC-2 is closed, and the contactor coil C is demagnetized to stop the motor and interrupt the door closing command. Next, when the elevator starts running, the switch ER closes, the contactor coil C is energized, its contacts Cl and C2 close, and the circuit C1-A-C2 causes a current to flow to the armature A and to the door. Applying force in the closing direction.

Further, when the elevator reaches a certain floor, the switch ES is opened, the contactor coil C is demagnetized, and the door closing command is interrupted. Next, the operation of switch 0RS will be explained. First, when switch 0RS closes while the door is closed,
The contactor coil 0R is excited by the DS-0R-0RS-CS-0LS circuit, its contact 0R-3 is opened (contacts X-1 and 0E-1 are closed), and the contactor DC is demagnetized.
The contact DC-1 is opened, the contactor coil C is demagnetized,
Moreover, when DC-2 is closed, the contactor coil O is energized and the door is opened. Additionally, when the switch 0RS is closed while the door is open, the contactor coil 0R is energized and its contact 0R-2
When the contactor coil 0E is opened, the contactor coil 0E is demagnetized, its contact 0R-4 is closed, and the SS-0R-4-X-2-0E-
The contactor coil JDC is excited by the circuit 1-DC, and when the contact DC-1 is closed, the contactor coil C is excited and the door is closed. Next, switch SS is a door safety switch that operates while the door is closed.

The operation is such that when the switch SS is opened while the door is closed, the contactor coil DC is demagnetized, and at the same time its contact -1 is opened, DC-2 is closed and the door is opened. As described above, the present invention provides a mechanism for applying a force greater than the normal door opening force from the door drive device during or during the opening operation of a door that is provided at an entrance and exit and is equipped with a drive device for automatically opening and closing. When a driving force is generated, an automatic door protection device is equipped with a control device that detects this driving force and stops or reverses the opening operation of the door. Since the driving force is applied in the same direction, it is possible to prevent passengers from getting stuck in accidents caused by the doors opening and the elevator stopping due to mischief by passengers while the elevator is running. has.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram showing a conventional automatic door protection device for an elevator car, Fig. 2 is a detailed view of the same main part, and Fig. 3 is an implementation of the protection device for an automatic door for an elevator car according to the present invention. A configuration diagram showing an example, and FIG. 4 is a control circuit diagram applied to the same embodiment. 1...Door, 6...Door drive motor, 8
... Drive pulley, 9... Cam link,
20...Groove, 21...Roller, 23...
...Plate spring, 26...Compression spring, 30...
... Limit switch, 31 ... Switch actuation piece, 32 ... Door closing confirmation switch, 40 ...
...Locking part.

Claims (1)

[Claims] 1. A power transmission section disposed between a door provided at an entrance and a drive device that automatically opens and closes the door is deformed due to the generation of a driving force greater than the normal door opening/closing force. An automatic door for an elevator car, which has a variable device that restores to its original state when released, and a control device that is activated by the deformation of the variable device to stop or reverse the opening/closing operation of the door. In the protection device, while the elevator is running, the drive device deactivates the control device at or near the end of the door closing operation, and applies a driving force in the closing direction to the door while the door is closing. A protection device for an automatic door for an elevator car, which is characterized by: