JP2013035650A - Elevator door load detecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator door load detecting device configured to detect an undesirable load applied to a door.SOLUTION: The door load detecting device includes: a door guide rail 21 for guiding the door 3b in the door opening/closing direction; a door hanger 15b for hanging and supporting the door 3b; a plurality of hanger rollers 17a, 17b arranged on the door hanger 15b in the door opening/closing direction and arranged above the door guide rail 21; a plurality of upthrust rollers 19a, 19b arranged below the door guide rail 21; and a load detecting means. The upthrust roller 19b of the upthrust rollers 19a, 19b, which is to be located behind in the moving direction of the door 3b when the door 3b is prevented from moving, presses the door guide rail 21 upward from below. The load detecting means detects the pressing operation of the upthrust roller 19b, and detects the load for preventing the door 3b from opening/closing.

Description

  The present invention relates to an elevator door load detection device.

  The elevator includes a plurality of landings provided on a plurality of floors of the structure, a hoistway extending up and down so as to connect the landings, and a car provided to be movable in the hoistway. A landing door is provided at each landing, and a car door is provided on the surface of the landing side of the car. Then, with the car stopped at the landing on the target floor, both the car door and the landing door are opened, so that the user can get on and off between the landing and the car.

  Until now, as a device for detecting a state in which the opening and closing of the door is inhibited, for example, there has been a door sill foreign material contamination detection device disclosed in Patent Document 1. In this device, a pressure switch is provided to monitor the pressing force when the door abuts in the vicinity of the fully closed state, and foreign matter is clogged in the sill groove that guides the door, and the pressing pressure of the door falls below a predetermined value. Therefore, contamination of foreign matter was detected.

  However, in the apparatus of Patent Document 1, if the door hits an obstacle and the door does not come into contact with the pressure switch, the expected detection effect may not be obtained. Also, as an aspect different from the detection aspect of Patent Document 1, the current value of the door motor is monitored, and the presence of an obstacle is detected when the drive current value increases rapidly when the door opening / closing operation is hindered. Is also possible. However, in such an aspect, the drive current value may increase due to a load other than the opening / closing load of the door itself, for example, a load of a crank bearing or the like in the path for transmitting the opening / closing force. In some cases, load detection cannot be performed correctly.

Japanese Utility Model Publication No. 63-167479

  The present invention has been made in view of the above, and an object thereof is to provide an elevator door load detection device capable of detecting an undesired load acting on the door itself.

  The present invention for achieving the above-described object is provided with a door guide rail for guiding a door in a door opening / closing direction, a door hanger for supporting the door in a suspended manner with respect to the door guide rail, and the door hanger. A plurality of hanger rollers and a plurality of up thrust rollers arranged in a door opening / closing direction, wherein the plurality of hanger rollers are disposed above the door guide rail, and the plurality of up thrust rollers include the door The hanger roller is arranged below the guide rail, and the hanger roller rotates in contact with the door guide rail when the door is normally opened and closed. The up-thrust roller, which is located behind the door in the traveling direction, presses the door guide rail upward from below, By detecting the pressing operation of the serial-up thrust roller, load detecting means for detecting a load which inhibit the opening and closing of the door is a door load detecting device which is provided.

  According to the door load detection device of the present invention, it is possible to detect an undesirable load acting on the door itself.

It is a figure showing from the direction which looked at the elevator car to which the door load detection device of an embodiment of the invention is applied from the landing side. It is a figure which shows the cross section which follows the II-II line | wire of FIG. It is a perspective view of a door guide rail. It is an end view of a door guide rail. It is a perspective view of a lower rail material. It is a figure which shows operation | movement of the door load detection apparatus which concerns on this Embodiment.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a door load detection device according to the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals indicate the same or corresponding parts.

  FIG. 1 is a diagram showing an elevator car to which the door load detection device of the present embodiment is applied as seen from the landing side. FIG. 2 shows a cross section taken along line II-II in FIG. The elevator car 1 is provided with at least a pair of left and right doors 3a, 3b, a drive mechanism 5, and a door frame 7. The car only needs to have at least one door, and the pair of left and right doors are shown as an example.

  The pair of left and right doors 3a and 3b open and close the entrance to the cab. The drive mechanism 5 opens and closes the doors 3a and 3b, and includes a drive source 9 such as a motor, a pair of left and right rotating bodies 11a and 11b, an endless circulating body 13 and the same number of door hangers as the doors. 15a, 15b.

  The circulating body 13 is wound around the rotating bodies 11a and 11b, and when the first rotating body 11a is rotated by the driving force of the driving source 9, the circulating body 13 is driven passively, thereby further The second rotating body 11b is rotated in a driven manner.

  The pair of left and right door hangers 15 a and 15 b connect the corresponding doors 3 a and 3 b to the circulation body 13. In this way, the drive mechanism 5 is supported by the door frame 7, and the doors 3 a and 3 b are supported in a manner that can be opened and closed and suspended from the door frame 7.

  Each door hanger 15a, 15b is provided with a pair of left and right hanger rollers 17a, 17b and a pair of left and right up thrust rollers 19a, 19b. The pair of left and right hanger rollers 17 a and 17 b are disposed above the door guide rail 21, and the pair of left and right up thrust rollers 19 a and 19 b are disposed below the door guide rail 21. The hanger rollers 17a and 17b and the up thrust rollers 19a and 19b are aligned vertically. Further, the hanger rollers 17a and 17b and the up thrust rollers 19a and 19b are vertically separated, and a door guide rail 21 extends left and right between them.

  When the doors 3a and 3b are stationary and during normal opening and closing operations (when the opening and closing operations are not hindered), the hanger rollers 17a and 17b are contacted and supported on the upper surface 21a of the door guide rail 21 and suspended. It has been. When the doors 3a and 3b advance in the opening and closing direction during normal opening and closing, the hanger rollers 17a and 17b rotate the upper surface 21a of the door guide rail 21. On the other hand, the up thrust rollers 19a and 19b are held in a non-contact state at a slight distance from the lower surface 21b of the door guide rail 21 at this time.

  Next, an elevator door load detection device according to the present embodiment will be described. The door load detecting device 51 includes at least the door guide rail 21, door hangers 15a and 15b, hanger rollers 17a and 17b, up thrust rollers 19a and 19b, and load detecting means 53.

  As is clear from the above-described configuration, the door guide rail 21 guides the doors 3a and 3b along itself, that is, guides the door in the door opening / closing direction. In other words, the door guide rail 21 extends in the door opening / closing direction (door traveling direction).

  The load detection means 53 detects the pressing operation of the up thrust rollers 19a and 19b when the up thrust rollers 19a and 19b press the door guide rail 21 upward from below as described later. The presence of a load that hinders the opening and closing of the doors 3a and 3b is detected.

  In the present embodiment, the door guide rail 21 also functions as the load detection means 53. 3 is a perspective view of the door guide rail, FIG. 4 is an end view of the door guide rail, and FIG. 5 is a perspective view of the lower rail member. The door guide rail 21 includes an upper rail member 55 and a lower rail member 57 that are separated in the vertical direction and extend in the door opening / closing direction.

  In one embodiment of the upper rail member 55 and the lower rail member 57, in the present embodiment, the lower rail member 57 is formed with a protrusion 59 extending in the door opening / closing direction on the upper portion thereof. Further, a plurality of elongated holes 61 are formed in the protrusion 59 in the present embodiment. The two long holes 61 are sufficiently separated in the door opening / closing direction. Each elongated hole 61 extends through the protruding portion 59 and extends in the direction in which the upper rail member 55 and the lower rail member 57 are separated and approached.

  In the present embodiment, on the other side of the upper rail member 55 and the lower rail member 57, the upper rail member 55 is formed with a concave groove portion 63 into which the above-mentioned protrusion 59 is inserted. Further, the upper rail member 55 is provided with a plurality of support portions 65 that are inserted into the corresponding long holes 61 and support the lower rail member 57 with respect to the upper rail member 55. The plurality of support portions 65 are constituted by guide pins that traverse the groove of the concave groove portion 63.

  The door guide rail 21 is fixedly supported by the upper rail material 55, and the lower rail material 57 is suspended by a support portion 65 that penetrates the elongated hole 61, that is, fixed like the upper rail material 55. It is possible to move in the vertical direction (in the direction of separation / approach from the upper rail material) guided by the long hole 61.

  The door guide rail 21 is provided with a detection unit 67 that detects a pressing state of the lower rail member 57 against the upper rail member 55. The detection unit 67 may be of any type such as a sensor or a switch. Whether the detection unit 67 detects a pressing force / pressure by the lower rail member 57 or a distance state between the lower rail member 57 and the upper rail member 55. Alternatively, a device that detects contact between the lower rail member 57 and the upper rail member 55 as a contact state or a conductive state is used. In addition, illustration of the detection part 67 is an example to the last, and the detection part 67 shall be installed in a suitable site | part according to the type of the detection mechanism.

  Next, the operation of the door load detection device described above will be described. The closing operation of one door 3b will be described as an example. FIG. 6 is a diagram illustrating the operation of the door load detection device according to the present embodiment. 6 is drawn with exaggeration in order to facilitate the understanding of the explanation. For example, the degree of the gap between the hanger roller or the up thrust roller and the door guide rail, the opening / closing of the door The slope at the time of inhibition is drawn to be extremely larger than actual.

  As shown in FIG. 6A, in a state in which the door 3b is normally closed toward the fully closed state, the hanger rollers 17a and 17b come into contact with the door guide rail 21 and its upper surface 21a. Is rolling. At this time, since the hanger rollers 17a and 17b are not in contact with the lower surface 21b of the door guide rail 21 with a slight gap, the lower rail member 57 is not pressed upward by the contact of the hanger rollers 17a and 17b. Not. That is, the lower rail member 57 is hung sufficiently away from the upper rail member 55, and the load detecting means 53 is in a state where no load is detected.

  Next, as shown in FIG. 6B, a case where an obstacle 69 comes into contact with the lower portion of the door 3b and a normal closing operation is prevented will be described. When the obstacle 69 comes into contact with the lower portion of the door 3b, the door 3b receives a rotational force as indicated by an arrow R as a whole from the door driving force and the reaction force caused by the contact of the obstacle 69. As a result, of the up thrust rollers 19a and 19b, the up thrust roller 19b, which is rearward in the traveling direction of the door 3b when the progress of the door 3b is inhibited, presses the door guide rail 21 upward from below. That is, the lower surface 21b of the door guide rail 21 is pushed up. Thereby, the lower rail member 57 is pressed toward the upper rail member 55, and the load detecting means 53 detects the pressing operation of the up thrust roller 19b, and detects a load that hinders the normal closing operation of the door 3b. . Even when the normal opening operation of the door 3b is obstructed, the same detection is performed by detecting the pressing operation of the up thrust roller 19a. The opening / closing operation of the door 3a is the same. In this way, load detection is performed by the door load detection device 51 of the present embodiment.

  As described above, in the door load detection device according to the present embodiment, from the upward pressing operation of the up thrust roller, which is behind the door in the traveling direction, due to the reaction force to the door, Unlike the aspect of monitoring whether or not the door has progressed to the vicinity of the fully closed state and the aspect of monitoring the current value, it is possible to detect an undesirable load acting on the door itself.

  In addition, since the door guide rail extending in the door opening / closing direction functions as a load detecting means, it is possible to detect the load uniformly regardless of the position of the door from the fully open position to the fully closed position. Furthermore, since the upper rail material and the lower rail material are connected to each other by a plurality of elongated holes arranged in the door opening / closing direction and a corresponding plurality of support portions, the up thrust roller can be moved from any position. Even if the lower rail material is pushed up, the lower rail material will rise while maintaining a substantially parallel posture with respect to the upper rail material, and it is possible to suppress a decrease in detection accuracy which is a concern due to the inclination of the lower rail material. it can. Further, as shown in FIG. 4, the lower rail material is reliably regulated even with respect to a posture change that rotates around the axis A along the door opening / closing direction (indicated by T). More stable operation is guaranteed as the detection means.

  Although the contents of the present invention have been specifically described with reference to the preferred embodiments, various modifications can be made by those skilled in the art based on the basic technical idea and teachings of the present invention. It is self-explanatory.

  For example, the load detection means may be separate from the door guide rail. As a specific example, a limit switch as a load detecting means is provided at the base of the up thrust roller, and when the corresponding up thrust roller presses the lower surface of the door guide rail, the door guide against the pressing of the up thrust roller. The reaction force from the rail can be detected by the operation of a limit switch, and the load on the door can be detected accordingly. In this case, the limit switch moves greatly in the opening / closing direction together with the door hanger, and wiring is applied to the moving member. Therefore, in the point that the reliability of the detection device is easily maintained, The form is more advantageous because it can be wired to a door guide rail that does not move in the opening and closing direction.

  In the above-described embodiment, the example in which the door load detection device is applied to the car door has been described. However, the present invention is not limited to this, and the door load detection device is applied to the landing door. Would also be possible.

  3a, 3b Door, 15a, 15b Door hanger, 17a, 17b Hanger roller, 19a, 19b Up thrust roller, 21 Door guide rail, 51 Door load detection device, 53 Load detection means, 55 Upper rail material, 57 Lower rail material, 59 ridge, 61 oblong hole, 63 concave groove, 65 support.

Claims (4)

A door guide rail for guiding the door in the door opening and closing direction;
A door hanger that suspends and supports the door from the door guide rail;
A plurality of hanger rollers and a plurality of up thrust rollers arranged on the door hanger and arranged in the door opening and closing direction;
The plurality of hanger rollers are disposed above the door guide rail, and the plurality of up thrust rollers are disposed below the door guide rail,
The hanger roller rotates in contact with the door guide rail when the door is normally opened and closed,
Of the up-thrust rollers, the up-thrust roller, which is located behind the door in the direction of travel when the door is blocked, presses the door guide rail upward from below,
Load detecting means for detecting a pressing operation of the up thrust roller and detecting a load that hinders opening and closing of the door is provided,
Elevator door load detection device. The door guide rail functions also as the load detection means,
The door guide rail includes an upper rail material and a lower rail material that are separated in the vertical direction and extend in the door opening / closing direction, respectively.
The elevator door load detection device according to claim 1, wherein the load detection means detects that the lower rail member is pressed toward the upper rail member. One of the upper rail material and the lower rail material is provided with a plurality of elongated holes extending in the door opening / closing direction, and the other corresponds to the other. The elevator door load detection device according to claim 2, further comprising a plurality of support portions that are inserted into the elongated holes and support the lower rail material with respect to the upper rail material. One of the upper rail material and the lower rail material is formed with a ridge extending in the door opening / closing direction, and the other is formed with a concave groove into which the ridge is inserted.
4. The elevator door according to claim 3, wherein the plurality of elongated holes are provided so as to penetrate the protruding portion, and the plurality of support portions are provided so as to cross the inside of the groove of the concave groove portion. Load detection device.

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