JP2006082886A - Door device for elevator doorway - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify an automatic closing mechanism of a door device for an elevator doorway. <P>SOLUTION: Rails 4a and 4b for guiding a wheel 5 provided in a suspending part 2 of each of doors 1a and 1b of the elevator doorway are fixed in the condition wherein the rails are tilted so that the doors 1a and 1b opening direction side becomes higher. When motive force for opening/closing the doors 1a and 1b is used up in the condition wherein the doorway is not closed yet, a wheel 5 of each of the doors 1a and 1b rolls toward a door 1a and 1b closing direction side with deadweight thereof, and the doors 1a and 1b automatically slide to close the doorway. Structure of the automatic closing mechanism is thereby simplified in comparison with a current one. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a door device that opens and closes an elevator doorway.

  In the door device of the elevator doorway, a wheel that rolls while being guided by a rail extending along the upper edge of the doorway is attached to the upper part of the door arranged along the doorway, and the wheel rolls by supplying power to the door. In many cases, the door is slid to open and close the doorway. Such a door device usually slides the door automatically when the power supply to the door is stopped so that the doorway is not left open even if the door drive device fails during door opening and closing. It has a self-closing mechanism that closes.

  As the above self-closing mechanism, one in which one end of a wire hung on a pulley is tied to a door and a weight is attached to the other end of the wire so that the door is pulled by its own weight and slides in the closing direction is generally used. (For example, refer to Patent Document 1). In addition, as shown in FIG. 5, a pair of pulleys above the entrance / exit is provided with a suspension portion 54 provided with wheels 53 that roll on rails 52 a and 52 b so that the two doors 51 a and 51 b are interlocked with each other. When attached to the wire 56 wound around 55, one end of a spring 57 attached to the suspended portion 54 of one door 51a is tied to a bracket 58 fixed above the center of the entrance / exit, so that both doors 51a, 51b are connected. Some of them are automatically closed by the elastic restoring force of the spring 57.

However, in the above-described conventional self-closing mechanism, it is necessary to attach members that are not used for normal door opening and closing operations such as weights and springs, so the installation space for these members tends to be a restriction on the design of the door device. There is a problem that maintenance takes time.
JP 2004-107012 A

  The subject of this invention is simplifying the self-closing mechanism of the door apparatus of an elevator doorway.

  In order to solve the above-described problems, the present invention attaches a wheel that rolls while being guided by a rail extending along an upper edge of an entrance to an upper portion of a door disposed along an entrance of an elevator. In the elevator doorway door device in which the door slides and opens and closes the doorway by rolling the wheel by supplying the wheel, the rail is inclined so that the opening direction side of the door becomes higher, When supply of power to the door is stopped when the doorway is not closed, the wheel automatically rolls toward the closing direction of the door by the action of the weight of the door, so that the door automatically slides. The doorway was closed.

  That is, the rail that guides the door wheel is tilted so that the door opening direction side becomes higher, and when the power to open and close the door is lost, the door automatically slides by its own weight and closes the entrance / exit. This eliminates the need for a member for sliding the door in the closing direction separately from the normal door opening / closing operation.

  As described above, the present invention employs a simple configuration in which the rail for guiding the wheel of the door is simply tilted so that the door opening direction side is high as the self-closing mechanism of the door device of the elevator doorway. Compared to the above, the design restrictions of the door device can be reduced, and the workability during maintenance can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2 show a first embodiment. The door device for the elevator entrance / exit rolls while being guided by rails 4a, 4b fixed to a header 3 above the entrance / exit on a suspension portion 2 provided at the upper ends of a pair of left and right doors 1a, 1b arranged along the entrance / exit. A state in which the two doors 1a and 1b are suspended from the rails 4a and 4b by attaching two wheels 5 to each other and supplying power to the doors 1a and 1b from a driving device (not shown) to roll the wheels 5. The doors are slid in opposite directions to open and close the doorway.

  The doors 1a and 1b are slid in conjunction with each other by associating a wire 6 hung around a pair of pulleys 7 and 7 above the header 3 with a pin 6 provided at each hanging portion 2. . The power is directly supplied to one of the doors 1a and 1b and indirectly supplied to the other through the wire 8. In addition, a lock mechanism 10 that engages with a hook portion 9a of a bracket 9 fixed to the header 3 and holds the doorway in a fully closed state is provided on the suspended portion 2 of the left door 1a.

  The rails 4a and 4b extend along the upper edge of the doorway, and are fixed to the header 3 in an inclined state so that the opening direction side of the doors 1a and 1b becomes higher. Accordingly, when the power supply to the doors 1a and 1b is stopped when the doorway is not closed as shown in FIG. 1, the wheels 5 of the doors 1a and 1b are closed by the action of the dead weight of the doors 1a and 1b. By rolling toward the direction side, both doors 1a and 1b slide to close the doorway.

  As described above, the self-closing mechanism of the door device has a simple structure in which the rail that guides the wheel of the door in a normal door opening / closing operation is simply inclined so that the door opening direction side becomes higher. Therefore, in this door device, since there is no need to attach a member dedicated to the conventional self-closing mechanism such as a weight and a spring, the degree of freedom of design is great and maintenance work is easy to perform.

  3 and 4 show a second embodiment. In this embodiment, two doors 1a and 1b are arranged at the front and rear, two pulleys 11 are provided on the suspended portion 2 of the front door 1a, and one end of the wire 8 hung on each pulley 11 is connected to the rear door. The front door 1a is halved in the same direction as the rear door 1b by connecting the other end to the pin 12 fixed to the header 3 at the other end of the suspension 1b and supplying power to the rear door 1b and sliding it. The doorway is opened and closed by sliding at a speed.

  The rails 4a and 4b for guiding the wheels 5 of the doors 1a and 1b are all inclined so that the left side of the drawing is higher, that is, the opening direction side of the doors 1a and 1b is higher as in the first embodiment. When the power to open and close the doors 1a and 1b is lost, the doors 1a and 1b automatically close the entrance by their own weight. In addition, the lock mechanism 10 for maintaining the fully closed state of the entrance / exit is provided in the suspended portion 2 of the door 1b on the rear surface side. The configuration of the other parts is the same as that of the first embodiment.

  In this door device as well, as in the first embodiment, a self-closing mechanism having a simple structure in which the rail is inclined so that the door opening direction side becomes higher is adopted, so that there are fewer design restrictions than before. The maintenance workability can be improved.

The front view which looked at the door device of a 1st embodiment from the hoistway side (door open state) Sectional view along the line II-II in FIG. The front view which looked at the door apparatus of 2nd Embodiment from the hoistway side (door closed state) Sectional view along line IV-IV in FIG. Front view of a conventional door device viewed from the hoistway side (door open state)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a, 1b Door 2 Suspended lower part 3 Header 4a, 4b Rail 5 Wheel 6 Pin 7 Pulley 8 Wire 11 Pulley 12 Pin

Claims (1)

  At the top of the door arranged along the doorway of the elevator, a wheel that rolls guided by a rail extending along the upper edge of the doorway is attached, and the wheel is rolled by supplying power to the door, In the elevator doorway door device that slides the door to open and close the doorway, the rail is inclined so that the opening direction side of the door is raised, and the power to the door is not closed. An elevator characterized in that when the supply is stopped, the door rolls toward the closing direction of the door by the action of its own weight, so that the door automatically slides to close the entrance / exit. Doorway door device.

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