JPS6326381Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an elevator door opening prevention device.

In recent years, in public housing complexes and the like where many elevators have been installed, passengers, especially children, have occasionally jumped while the elevator was in operation, activating the elevator's safety device and causing the elevator car to come to an emergency stop. When this happens, passengers naturally become trapped inside the elevator car.

Conventional elevator car doors are structured so that they can be easily opened manually from inside the elevator car, so in such cases, passengers may try to escape themselves from inside the elevator car and fall into the hoistway. It was dangerous.

The present invention was developed in view of the above points, and provides an elevator door opening prevention device that prevents manual opening of the elevator car from within the elevator car to protect the safety of passengers when the elevator car makes an emergency stop for some reason. The purpose is to

FIG. 1 is an overall view showing an embodiment of the door opening prevention device according to the present invention installed on an elevator car, in which 1 is the elevator car, 2 is the car door, and 3
4 is a door opening prevention device and a door motor mounting member; 5 is a door motor; and 6 is a belt pulley. Normally, the rotation of the door motor 5 is transmitted to the car door 2 via a belt pulley 6 and a link device (not shown), and the car door opens and closes.

Moreover, FIG. 2 is an enlarged view of part A in FIG.
9 is a friction plate attached to the shaft of the iron core 11, 9 is a pressure plate with a gear cut structure attached to one end of the horizontally slidable iron core 11 facing the friction plate 8, 10 is a spring, and 12 is an electromagnet (not shown). ), and the electromagnet of the suction device 12 is constantly energized and connected to a power source (not shown) so as to be demagnetized when the elevator car makes an emergency stop outside the floor level. Reference numeral 13 denotes a stopper that is constantly engaged with the geared portion of the press plate 9 to prevent the press plate 9 from rotating in a predetermined direction and to guide the movement of the press plate 9 in the horizontal direction.

The operation of the device of the present invention will be explained below.

First, when the elevator is operating normally, the electromagnet of the suction device 12 is excited, and the iron core 1
1 is the suction device 1 against the spring pressure of the spring 10.
2, the press plate 9 having a toothed structure provided at one end of the iron core 11 is attracted in the direction of the suction device 12 while being engaged with the stopper 13. In this state, the press plate 9 and the friction plate 8 are opposed to each other with a gap G in between, as shown by the dashed line in FIG. No problems will occur.

Next, when the elevator car comes to an emergency stop due to the activation of a safety device, etc., the electromagnet of the suction device 12 is de-energized, and the iron core 11 is moved in the opposite direction from the suction device 12 by the return force of the spring 10, that is, in the direction of the door motor 5. In order to move, the pressing plate 9 provided at one end of the iron core 11 is guided by the stopper 13 while being prevented from rotating, and presses the friction plate 8 attached to the shaft 7 of the door motor 5. prevent rotation. For this reason, the elevator car door 2, which is connected to the door motor 5 via the shaft 7, belt pulley 6, and link device, cannot be opened manually from inside the elevator car.

By the way, the press plate 9 has a geared structure that only allows rotation in one direction as shown in Fig. 3, but as can be seen from the purpose of the present invention, this only prevents the opening operation of the elevator car door. However, regarding the door closing operation, it is desirable that the elevator car door can be easily and completely closed manually from inside the elevator car, as in the conventional case. Furthermore, the force that prevents the rotation of the door motor can be adjusted by the spring pressure of the spring 10 used in the present invention, so by appropriately adjusting the spring pressure, the door can be opened if the passenger is an adult, but the door cannot be opened if the passenger is a child. It is also possible to do so.

As described above, according to the present invention, when the safety device is activated while the elevator car is running and the car makes an emergency stop outside the floor level, a press plate with a geared structure that is engaged and guided by the stopper is provided on the door motor shaft. Since the door motor is prevented from rotating by pressing the friction plate, it is possible to prevent only the door from opening manually from inside the elevator car, thereby preventing passengers from falling.

In addition, although the above explanation has only been about the case where the elevator safety device is activated and the elevator comes to an emergency stop, suction can also occur when the elevator car makes an emergency stop outside the floor level due to other abnormalities such as a power outage. As long as the electromagnet of the device 12 is configured to be de-energized, opening of the elevator car door can be prevented and passenger safety can be ensured.

[Brief explanation of the drawing]

FIG. 1 is an overall view of one embodiment of the present invention, FIG. 2 is an enlarged view of section A in FIG. 1, and FIG. 3 is an explanatory view showing the engagement relationship between the pressing plate 9 and the stopper 13. 5...door motor, 7...shaft of door motor 5,
8...Friction plate, 9...Press plate, 10...Spring, 11...Iron core, 12...Suction device, 13...
Stopper, G...Gap between the pressure plate and the friction plate.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A friction plate is attached to one end of the shaft of a door motor for opening and closing the elevator car door, and a suction device is provided with an iron core movable in the longitudinal direction of the shaft of the door motor, A pressing plate is provided at one end of the iron core so as to face the friction plate, and when the elevator car stops outside the floor level and the suction device is in a non-excited state, the pressing plate is connected to the door motor. It is characterized by being equipped with an elastic body that moves toward the shaft and presses the friction plate, and the press plate is always engaged and guided by a stopper to only prevent the elevator car door from opening. Elevator door opening prevention device. (2) The elevator door opening prevention device according to claim 1, wherein the elastic body is a spring provided on the iron core. (3) The elevator door opening prevention device according to claim 1, wherein the pressing plate has a geared structure in a portion that engages with the stopper.