JPS6216385Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a safe automatic door opening/closing device that temporarily relieves and eliminates the closing force of the door when a person or object gets caught in the door during the closing process, making it possible to escape easily. This is related to. Conventional side door opening/closing devices for vehicles include
In order to confirm that the door is closed, there is a door lock switch and a car side light connected to it to detect when the door is fully closed. The side lights did not go out, and the conductor operated the door open/close switch again to open all the doors.

However, in the case of long trains, especially at stations where the platform curves, it takes time for the conductor to confirm that the car's side lights are off, and there may be a delay in operating the door open/close switch, making it difficult for people caught in the train to escape. It can be dangerous.

This invention solves the problems as mentioned above,
A door switch is installed on each side door to detect when a person or object is trapped, and this includes a door lock switch for detecting the fully closed state, and an electromagnetic switch for discharging the pressure fluid from the fluid pressure cylinder for opening and closing the door. When the door is caught in the door, pressure fluid is temporarily discharged from the door opening/closing fluid pressure cylinder, and the closing force of the door is relaxed and eliminated.

Embodiments of the present invention will be described based on the drawings.

In FIG. 1, 1 and 1a are double-sliding automatic doors of a vehicle, and 2 and 2a are door tips made of an elastic material. Rods 4 and 5 are fixed to the doors 1 and 1a via mounting brackets 3 and 3a, and the rod 4 is a piston rod of a fluid pressure cylinder 6 for opening and closing the door. This rod 4 is connected to a rod 8 via a connecting member 7.
A rack 8a is formed in a part of the rod 8. A part of the rod 5 is also provided with a rack 5a, both racks meshing with a pinion 9. 10 is a door locking switch that detects the fully closed state of the door, and when the door is completely closed as shown in the figure, its contact roller 10a contacts the cam 11 attached to the rod 5 and the switch is turned off. When the door is not completely closed, the door is moved away from the cam 11 and the switch is turned on, turning on the side light. Fig. 2 shows a fluid circuit diagram between the fluid pressure cylinder 6 and the pressure fluid source 12. It is connected to one cylinder chamber 6a of the fluid pressure cylinder 6 via a discharge electromagnetic switching valve 16, and the pipe line 15 is connected to the other cylinder chamber 6b. FIG. 3 shows the electric circuit of this embodiment, and 18 is a door opening/closing switch, and the solenoid 1 of the door opening/closing electromagnetic switching valve 13 is shown in FIG.
3a, and when the switch is on, the door opening/closing electromagnetic switching valve 13 is switched to supply pressurized fluid to the cylinder chamber 6b and discharged from the cylinder chamber 6a to open the door, and when the switch is off, the pressurized fluid is supplied to the cylinder chamber 6a and the cylinder The chamber 6b is discharged and the door is closed. 17
a, 17b are door switches provided at the door edge portions 2, 2a of the door, and are connected to the discharge electromagnetic switching valve 16.
It is connected to the solenoid 16a. Pressure fluid is supplied to the cylinder chamber 6a of the fluid cylinder 6 and discharged from the cylinder chamber 6b, and the door tip portions 2, 2 are closed while the door is closed.
When a person or object is caught in the doorway switch 17a,
17b is turned on, energizing the solenoid 16a of the discharge electromagnetic switching valve 16, and
switch to discharge the pressure fluid in the cylinder chamber 6a,
The force that pushes the piston to the right in the figure, that is, the door closing force, is relaxed and eliminated.

Door locking switch 1 that detects the fully closed state of the door
0 is a switch that is always on, and is on when the door is not completely closed, and is off when the door is completely closed. Therefore, if a person or object is caught between the door tips 2 and 2a of both doors while the doors are not completely closed, the discharge electromagnetic switching valve 16 is activated to reduce the door closing force of the fluid pressure cylinder. Relax and disappear.

When the train stops and the conductor turns on the door opening/closing switch 18, the door opening/closing electromagnetic switching valve 13 switches to supply pressurized fluid from the pipe 15 to the cylinder chamber 6b and discharge it from the cylinder chamber 6a, causing the piston to move to the left. 1, the sliding door 1 is moved to the left via the rod 4 and the mounting bracket 3 to open it, and the rod 8 is also moved to the left via the connecting bracket 7 to open the rack 8a, pinion 9, and rack. 5a, the rod 5 is moved to the right, and the door 1a is moved to the right via the mounting bracket 3a to open the door. At the same time, the door lock switch 10 is turned on and the vehicle side lights are turned on. When the conductor turns off the door opening/closing switch 18 at the time of departure, the door closes in the opposite manner to the above, and the car side lights of the completely closed door go out. At this time, if a person or object is caught in either door, the door switches 17a and 1 are activated as described above.
7b operates to discharge the pressure fluid from the cylinder chamber 6a, reducing the door closing force and facilitating escape. Immediately after escaping, the door switches 17a and 17b are turned off, the discharge electromagnetic switching valve 16 is switched to the state shown in Fig. 2, and the door increases its closing force again to completely close.
The door locking switch 10 is turned off, and even if a hand or an object is inserted into the door tip portions 2, 2a, the door tip switch does not operate and the door does not open. However, the door switch 17
It would be safer if there was a certain time limit from the time a, 17b is activated until the door starts closing again after escape, and if a door closing warning buzzer sounds.

FIG. 4 shows an electrical circuit diagram of a second embodiment that operates as described above, and is one in which a timer circuit and a buzzer circuit are added to the circuit of the door switch 17a. In the figure, T is a timer, Ta is its contact, X is a relay, Xa, Xb, and Xc are its contacts, and BZ is a buzzer. When the door is caught during the closing process, the door switch 17a is turned on as described above, and the contact of the timer T is activated by the door locking switch 10 which is in the on state.
Relay X is energized via Ta (normally closed), and its contacts Xa, Xb, and Xc are turned on. Contact Xa forms a self-holding circuit for timer T, contact Xb switches the discharge electromagnetic switching valve 16 to relieve and eliminate the closing force of the door, and contact Xc sounds a buzzer BZ to issue a warning. When the fixed time set by timer T is reached, timer contact Ta turns off, relay X is demagnetized, and relay contacts Xa, Xb, and Xc turn off.
The discharge electromagnetic switching valve 16 is switched to supply pressure fluid to the cylinder chamber 6a again, and the door begins to close and the warning buzzer stops sounding. You can escape freely while the buzzer is ringing, but the door closes when the buzzer ends.

According to the present invention explained in the above embodiments, even if a person or object is caught in a door, it is possible to easily escape, and there is no need for the conductor to operate the door opening/closing switch to open all doors. There is no pain or embarrassment being held back. The present invention is particularly effective for long trains, curved platforms, etc.

The present invention can be used not only for sliding doors for vehicles but also for any other type of automatic door.

[Brief description of the drawings]

Fig. 1 is an explanatory diagram of the automatic door opening/closing device of the first embodiment of the present invention, Fig. 2 is a fluid circuit diagram of the same, Fig. 3 is an electric circuit diagram of the same, and Fig. 4 is an electric circuit diagram of the second embodiment. show. 1, 1a... Door, 2, 2a... Door tip, 6...
Fluid pressure cylinder, 6a, 6b... cylinder chamber, 1
0... Door lock switch, 12... Fluid pressure source, 1
3... Door opening/closing electromagnetic switching valve, 16... Discharge electromagnetic switching valve, 17a, 17b... Door switch, 18...
...Door open/close switch.

Claims (1)

[Scope of utility model registration request] An electromagnetic switching valve for discharging pressure fluid is provided in a conduit that connects the cylinder chamber of the fluid pressure cylinder for opening and closing the door with the pressure fluid source and supplies pressure fluid when the door closes. A switching position is provided to open the cylinder chamber to the atmosphere during energization and to communicate the pressure fluid source and the cylinder chamber during demagnetization, as well as a door locking switch that is turned off only when the door is fully closed and when a person or object comes into contact with the door. This is detected when
An automatic door opening/closing device having safety, characterized in that a door switch that is turned ON is connected in series, and further connected to a solenoid of the electromagnetic switching valve for pressurized fluid discharge.