JPS62835B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an elevator door control device equipped with a switch mechanism for confirming that the elevator door is fully closed.

Usually, the elevator car door is opened and closed by a door machine provided on the car, while the landing door is configured to open and close in conjunction with the opening and closing of the car door.

First, a conventional elevator door control device will be explained with reference to FIGS. 1 and 2.

In Figures 1 and 2, 1 is the elevator car, 2 is the floor of the car 1, 3 is the doorway provided on one side of the car 1, and 4 is the door machine provided at the top of the car 1, and the motor 4a , small pulley 4b, large pulley 4c,
It consists of a V-belt 4d and a control device 4e. 5 is a rail appropriately fixed to the upper part of the doorway 3 of the car 1;
Reference numeral 6 denotes a door hanger, which includes hanger rollers 6a, 6b and anti-tilt rollers 6c, 6 that roll on the rail 5.
d and a hanging plate 6e that pivotally supports the roller. 7 is a car door whose upper end is suspended by a door hanger 6 and whose lower end is guided by a part of the floor 2 to open and close the entrance/exit 3; 8 is fixed to the car door 7 and is a landing door (not shown); vanes for transmitting power to
Reference numeral 9 denotes a gate switch mechanism, which consists of a switch 9a fixed to the car 1 and an operating piece 9b fixed to a hanging plate 6e. 10 is the drive arm, door machine 4
It consists of four links 10a, 10b, 10c and 10d so as to transmit power from the car to the car door 7, one end of the link 10a is fixed to the large pulley 4c, and the other end is pivotally connected to the link 10b. ing. The link 10c has an intermediate portion pivotally connected to the car 1, an upper end portion pivotally connected to the other end of the link 10b,
One end of the lower end of the link 10d is pivotally connected to a part of the car door 7, and the other end of the link 10d is pivotally connected. Reference numeral 11 denotes an engagement piece fixed to a landing door (not shown), which receives the opening/closing force of the car door 7 to close the landing door (not shown).
This is for opening and closing the car door 7 at the same time as the car door 7. Reference numeral 12 denotes a foreign object caught near the lower end of the doorway 3 and the door 7 of the car.

In the system configured as described above, the car 1 is stopped at a certain floor, and when a passenger operates a button (not shown) for the destination floor to board the car, the control device 4e of the door machine 4 is activated to open the car door. 7 is issued, the motor 4a starts rotating counterclockwise, and after a certain period of time, the car door 7 closes to the entrance 3 as shown in FIG.
is fully closed, and the gate switch mechanism 9 is activated. Further, the vane 8 and the engagement piece 11 also assume the relationship shown in FIG. 1, and the car 1 starts traveling toward the target floor.

However, the conventional door opening/closing device as described above has the following drawbacks. That is, in order to reduce noise during rolling, the outer peripheries of the hanger rollers 6a and 6b are coated with a non-metallic material such as polyurethane rubber, and the anti-tilt roller 6
In order to reduce running resistance of the car door 7, a slight gap is provided between the car door 7 and the rail 5.
For this reason, if the above-mentioned gap is adjusted to be larger, the doorway 3 and the car door 7 will be closed, as shown in Fig. 2.
Even if a foreign object 12 is caught near the lower end of the car, the car door 7 is tilted so that its upper end is almost fully closed and the gate switch mechanism 9 is activated, allowing the car 1 to run. Even if the foreign object 12 is held in this way, when the car 1 is able to run, if a passenger does a mischief such as making the foreign object 12 such as a long stick protrude outward from the car 1, the foreign object 12 may be removed.
2 may damage equipment (not shown) in the hoistway,
There is a risk that the person playing the prank may be injured due to damage to the foreign object 12. In addition, the vane 8 and the engagement piece 1
There was a risk that the vane 8 or the engagement piece 11 would be damaged due to the displacement of the vane 8 or the engagement piece 11 due to interference with the car 1 while the car 1 was running.

This invention attempts to eliminate the above-mentioned drawbacks, and is an elevator that allows the car to run after confirming that the lower end of the car door is fully closed, thereby preventing equipment damage and personal injury. The purpose is to provide a door control device.

An embodiment of the present invention will be described below with reference to FIGS. 3 to 5.

3 to 5, the same reference numerals as in FIGS. 1 and 2 indicate the same parts, 13 is a second gate switch mechanism for checking the inclination of the door, and a switch 13a fixed to the car 1; An operating piece 13 that operates a switch 13a fixed near the lower end of the car door 7
It consists of b. 9c is a normally open contact of the gate switch mechanism 9, 13c is a normally open contact of the second gate switch mechanism 13, 14 is a relay, 15 is a travel command circuit for instructing the car 1 to travel, and + and - are DC power supplies.

As shown in FIG. 3, when the car door 7 is fully closed correctly, the gate switch mechanism 9 and the second gate switch mechanism 13 are turned on, and the contact 9
When c and 13c are closed and the AND condition is established, the relay 14 is energized and the travel command circuit 15 is activated.

Therefore, as shown in FIG.
If a foreign object 12 is caught between the lower end of the door and the entrance/exit 3, the second gate switch mechanism 13 will not operate.
Since no running command for the car 1 is issued, damage to hoistway equipment, vanes 8, engagement pieces 11, etc. caused by the foreign object 12 is prevented, and personal injury caused by damage to the foreign object 12 can also be prevented.

In addition, in this invention, if a switch mechanism similar to the second gate switch mechanism 13 is provided near the lower end of the door of the landing, accidents caused by foreign objects 12 protruding toward the car 1 from the landing side can be prevented. It is also possible to prevent this, making it possible to construct a safer elevator system.

As explained above, the present invention is provided with a switch mechanism for checking the fully closed state of the door at the upper end of the door which opens and closes the entrance/exit of the elevator by suspending the upper end, and a switch mechanism for checking the door inclination when the door is fully closed at the lower end. In addition to providing a gate switch mechanism, the elevator is enabled to run only when the AND condition of the on signals of both switch mechanisms is met, so that there is no possibility that a foreign object may be caught near the bottom edge of the door and the car may remain tilted. This has the effect that it is possible to reliably prevent the elevator from running, and also to prevent damage to various equipment in the hoistway and personal injury caused by mischief by passengers, thereby providing safer elevator equipment.

[Brief explanation of the drawing]

Figure 1 is a front view of a conventional elevator car door opening/closing mechanism as seen from the landing side, and Figure 2 is a front view of an elevator car door opening/closing mechanism with a foreign object trapped near the lower end of the elevator car door. 3 is a front view corresponding to FIG. 1 showing an elevator door control device according to an embodiment of the present invention; FIG. 4 is a sectional view taken along the line -- in FIG. 3; The figure is a circuit diagram showing a control circuit of an elevator door control device according to an embodiment of the present invention. 1...basket, 3...doorway, 6...door hanger, 6a, 6b...hanger roller, 6c, 6d
...Tilt prevention roller, 7...Car door, 9...Gate switch mechanism, 12...Foreign object, 13...Second
Gate switch mechanism, 15... travel command circuit. In addition, the same parts or corresponding parts in the figures are indicated by the same reference numerals.

Claims (1)

[Claims] 1 A switch mechanism for confirming the door is fully closed is provided at the upper end of the door whose upper end is hung to open and close the doorway, and a gate switch mechanism is provided at the lower end for checking the inclination of the door when the door is fully closed. A control device for an elevator door, characterized in that the elevator is enabled to run only when an AND condition of ON signals of both switch mechanisms is satisfied.