JP2015020834A - Door safety device for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive door safety device for elevator that can prevent foreign matter from being drawn into a gap between a detection plate and a laterally hinged door with simple constitution after detecting the foreign matter being drawn in.SOLUTION: A door safety device includes: a car door 3 which opens and closes a doorway 2; a longitudinal frame 4 for doorway in which the car door 3 is accommodated; a detection plate 5 which is arranged to move between a standard position where a gap B formed on the side of the doorway 2 between the longitudinal frame 4 for doorway and the car door 3 and a standby position at a first distance from the standard position in an opening direction of an upper car door 3; a detection switch 10 which detects the detection plate 5 being refracted in the opening direction of the car door 3 from the standard position by a second distance shorter than the first distance; a door driving device 13 which opens and closes the car door 3; and a door control device 12 which controls the door driving device 13 so as to place the car door 3 in closing operation when the detection switch 10 detects the detection plate 5 being retracted by the second distance during opening operation of the car door 3.

Description

  The present invention relates to an elevator door safety device that prevents foreign objects from being drawn into a gap between a lateral sliding door that opens and closes an elevator car doorway and a landing doorway and a door pocket.

  A conventional elevator door safety device is configured such that the corner edge can be displaced with respect to the sleeve frame of the entrance / exit frame edge, the sensor is arranged inside the corner edge, and the corner edge part of the door and the entrance / exit frame edge. The door is retracted by detecting a slight displacement of the corner edge pushed by contact with a foreign object drawn into the gap G between the two and the sensor, and outputting this as an abnormality detection signal to the safety circuit. (For example, refer to Patent Document 1).

  In the conventional elevator door safety device described in Patent Document 1, the pressure of a foreign object drawn into the gap G is detected to immediately stop the pull-in operation of the door, but the pressure of the foreign object is detected. It takes some time to stop the door completely after it is done, and it is difficult to stop the door immediately due to the inertia in the pull-in direction. Therefore, there is a problem that the foreign matter is drawn into the gap G after the pressure of the foreign matter drawn into the gap G is detected until the door stops.

  In view of such a situation, the door edge corner of the door edge of the door frame is expanded by the pressure of foreign matter drawn into the door gap between the corner edge and the door. The corner edge movable means that rotates inside the edge, and is located behind the corner edge in the pull-in direction, and is blocked by the pull-in gap so as to prevent foreign objects from being pulled in by turning the corner edge. There has been proposed a conventional elevator door safety device including a pull-in prevention means for causing a member to appear (see, for example, Patent Document 2).

Japanese Utility Model Publication No. 58-67874 JP 2004-60325 A

  However, the conventional elevator door safety device described in Patent Document 2 requires a complicated mechanism for causing the blocking member to prevent foreign objects from being drawn into the pull-in gap by rotating the corner edge portion, thereby reducing the cost. There was a problem that it could not be planned.

  The present invention has been made to solve such a problem, and with a simple configuration, foreign matter is drawn into the gap between the detection plate and the side door after detecting the foreign matter being drawn. The purpose is to obtain an inexpensive elevator door safety device that can prevent the above.

  An elevator door safety device according to the present invention includes a lateral sliding door that opens and closes an entrance of an elevator, a door pocket in which the lateral sliding door is accommodated, and a gap formed on the doorway side between the door pocket and the lateral sliding door. A detection plate disposed in the door pocket so as to be movable between a standard position closed over the height direction of the doorway and a retracted position away from the standard position by a first distance in the opening direction of the lateral sliding door; A detector for detecting that the detection plate has retracted from the standard position in the opening direction of the lateral sliding door by a second distance shorter than the first distance, a door driving device for opening and closing the lateral sliding door, and an opening operation of the lateral sliding door And a control device that controls the door driving device to close the side door when the detector detects that the detection plate has retracted the second distance.

  According to the present invention, since the detector can detect that the detection plate has been retracted by the second distance shorter than the first distance during the opening operation of the side sliding door, a time lag occurs when the side opening door is reversed from the opening operation to the closing operation. Even if this occurs, the retraction operation of the detection plate can be continued during this time lag. Therefore, even if a foreign object is drawn into the gap between the door pocket formed on the doorway side of the door and the side sliding door and presses the detection plate during the opening operation of the side door, the detection plate will be closed. It moves in the opening direction together with the side swing door and the foreign object until it is reversed. As a result, the detection plate does not move until the horizontal swing door is reversed to the closing operation, and the foreign matter in the gap between the detection plate and the horizontal swing door is caused by the movement of the horizontal swing door and the foreign matter in the opening direction. Can be prevented. Therefore, a troublesome mechanism for causing the blocking member for blocking the foreign object to appear in the pull-in gap by the rotation of the corner edge portion is unnecessary, and the cost can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram explaining the whole structure of the elevator door safety device which concerns on Embodiment 1 of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is the front view which looked at the state by which the foreign material is not drawn in the door safety device of the elevator which concerns on Embodiment 1 of this invention from the landing side. It is the top view which looked at the state where the foreign material is not drawn in the door safety device of the elevator which concerns on Embodiment 1 of this invention from the perpendicular | vertical upper direction. It is the front view which looked at the state at the time of the foreign object drawing-in of the door safety device of the elevator which concerns on Embodiment 1 of this invention from the landing side. It is the top view which looked at the state at the time of the foreign material drawing-in of the door safety device of the elevator which concerns on Embodiment 1 of this invention from the perpendicular | vertical upper direction. It is the front view which looked at the state after foreign object drawing-in of the door safety device of the elevator concerning Embodiment 1 of this invention was detected from the landing side. It is the top view which looked at the state after foreign object drawing-in of the door safety device of the elevator which concerns on Embodiment 1 of this invention from the perpendicular | vertical upper direction.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of an elevator door safety device of the present invention will be described with reference to the drawings.

Embodiment 1 FIG.
1 is a schematic diagram for explaining the overall configuration of an elevator door safety device according to Embodiment 1 of the present invention, and FIG. 2 is a state in which no foreign object is drawn into the elevator door safety device according to Embodiment 1 of the present invention. FIG. 3 is a plan view of the elevator door safety device according to Embodiment 1 of the present invention as viewed from the top vertically when no foreign object is drawn in, and FIG. 4 is a plan view of the present invention. The front view which looked at the state at the time of the foreign material drawing of the door safety device of the elevator which concerns on form 1 from the cage | basket | car room, FIG. FIG. 6 is a plan view of the state as viewed from above, FIG. 6 is a front view of the state after the foreign object is detected in the elevator door safety device according to Embodiment 1 of the present invention, and FIG. D according to the first embodiment Foreign matter retracted state after detection of beta door safety device is a plan view from vertically above.

  FIG. 1 shows a state in which the car door is viewed from the inside of the car room, and FIGS. 2 to 7 show only one side sliding door with double doors for convenience, for the doorway located at the hem side of the car doorway. The frame edge is indicated by a two-dot chain line.

  In FIG. 1 to FIG. 3, a car door 3 is a double swing side sliding door that opens and closes the doorway 2 of the car 1. The vertical frame edge 4 for the entrance / exit is formed in an L shape composed of a sleeve frame 4a and a sleeve wall 4b, and is disposed on the left and right hem sides of the entrance / exit 2 of the car 1 with the sleeve frame 4a facing the car door 3. The door pocket which accommodates the car door 3 at the time of door opening is comprised.

  The detection plate 5 is configured in a U-shape in which the door side surface 5a and the attachment pieces 5b are formed on both sides of the detection surface 5c, the door side surface 5a faces the car door 3, the attachment piece 5b faces the sleeve wall 4b, and The detection surface 5c faces the sleeve frame 4a and is attached to the doorway vertical frame edge 4 by a plurality of links 6 and 7 so as to advance and retreat in the opening / closing direction of the car door 3. The plurality of links 6 and 7 are rotatably supported at both ends by the sleeves 4b and the attachment pieces 5b by pins 8 that are horizontal in the axial direction. An operation lever 9 is fixed to the link 7. The detection switch 10 as a detector is a micro switch that is attached to the sleeve wall 4b and is operated by the operation lever 9 coming into contact with the operation piece 10a.

  The elevator control device 11 controls the operation of the elevator and outputs a door opening / closing command signal in accordance with a signal from the detection switch 10 or a door opening / closing button (not shown), and other elevator operation conditions. The door control device 12 controls the opening / closing of the door based on the opening / closing command signal from the elevator control device 11. The door driving device 13 drives the door based on a control signal from the door control device 12.

  Here, the gap A between the car door 3 and the door side surface 5a is set to 3 mm, and the gap B formed on the doorway 2 side between the car door 3 and the sleeve frame 4a of the vertical frame edge 4 is set to 20 mm. Has been. Further, the detection surface 5 c is disposed over the entire area in the height direction of the doorway 2 of the car 1.

  In the door safety device configured as described above, the detection plate 5 disposed in the vertical frame edge 4 for the entrance / exit is a standard in which the detection surface 5c closes the gap B by a link mechanism including a plurality of links 6 and 7. It is possible to move between the position and the retracted position retracted from the standard position by the first distance in the opening direction of the car door 3. In addition, the detection switch 10 disposed in the vertical frame edge 4 for the entrance and exit of the detection plate 5 when the detection plate 5 is retracted from the standard position in the opening direction of the car door 3 by a second distance shorter than the first distance. The second distance, that is, the pulling of the foreign matter 15 into the gap B can be detected.

  Therefore, in a state where no external force is applied to the detection plate 5, the detection plate 5 is located at the standard position, and the door safety device is in a non-operating state. That is, as shown in FIGS. 2 and 3, the detection plate 5 rotates counterclockwise around the pin 8 in FIG. 2 due to its own weight, and the detection surface 5c is positioned at a standard position where it abuts the sleeve frame 4a. Thereby, the clearance gap B between the cage door 3 and the sleeve frame 4a is obstruct | occluded over the whole area of the entrance / exit 2 of the cage | basket | car 1 in the height direction. In this state, the operating lever 9 contacts the operating piece 10a and presses the operating piece 10a, and the detection switch 10 is in the ON state. And the elevator control apparatus 11 inputs the ON signal of the detection switch 10, and determines with there being no foreign material drawing.

  Next, when the elevator control device 11 outputs a door opening command signal, the door control device 12 controls the drive of the door driving device 13 so as to open the car door 3, and the car door 3 opens. At this time, when the foreign object 15 such as a human finger touches the car door 3 that opens, the foreign object 15 is pulled by the frictional force and pulled into the gap B by the car door 3 that opens. When the foreign matter 15 presses the detection surface 5 c, the detection plate 5 rotates clockwise around the pin 8 in FIG. 2, and the detection surface 5 c retracts in the opening direction of the car door 3. As a result, the detection plate 5 moves in the opening direction of the car door 3 together with the car door 3 and the foreign object 15, and the foreign object 15 is prevented from being drawn into the gap A.

  4 and 5, when the detection surface 5c is retracted in the opening direction of the car door 3 by the second distance from the standard position, the operation lever 9 is disengaged from the operation piece 10a, and the operation piece 10a is pressed. Is released, and the detection switch 10 is turned off. And the elevator control apparatus 11 inputs the OFF signal of the detection switch 10, determines that there is foreign object drawing, and outputs the door closing command signal. Therefore, the drive of the door drive device 13 is controlled so that the door control device 12 closes the car door 3.

  At this time, there is a time lag in the reversal from the opening operation of the car door 3 to the closing operation, and the movement in the opening direction of the car door 3 continues for a short time after the foreign object pull-in is detected. Therefore, the foreign object 15 is pulled by the car door 3 that opens during the time tag even after the foreign object is detected, and moves in the opening direction. At this time, as shown in FIGS. 6 and 7, the detection plate 5 moves in the opening direction of the car door 3 together with the car door 3 and the foreign material 15, and the foreign material 15 is prevented from being drawn into the gap A. Then, after the time lag elapses, the car door 3 is closed, and the foreign matter 15 moves in the closing direction together with the car door 3 and is drawn out from the gap B. At the same time, the detection plate 5 rotates counterclockwise around the pin 8 in FIG. 6, closes the gap B, and returns to the standard position.

  According to the first embodiment, since the detection plate 3 is configured to be retractable in the opening direction of the car door 3 even after the foreign object is detected, the opening operation of the car door 3 is closed after the foreign object is detected. Even if a time lag occurs in the reverse operation, the detection plate 5 can move in the opening direction together with the car door 3 and the foreign object 15 during the time lag. Therefore, the detection plate 5 does not move during the time lag, and the foreign matter 15 is prevented from being drawn into the gap A due to the foreign matter 15 moving in the opening direction together with the car door 3. Therefore, the troublesome mechanism described in Patent Document 2 in which the blocking member that prevents the foreign material from being drawn in is caused to appear in the pull-in gap by the rotation of the corner edge portion, and the cost is reduced.

In addition, since the detection surface 5c is disposed so as to block the gap B over the entire height direction of the doorway 2, the foreign matter 15 is prevented from being drawn into the gap A over the entire height direction of the doorway 2. It can be reliably prevented.
In addition, since the gap B is set to 20 mm, it is possible to reliably prevent the foreign matter 15 from being caught in the gap B when the foreign matter 15 is a finger.

  Further, the detection plate 5 is connected to the sleeve wall 4b and the mounting piece 5b by the links 6 and 7, and is disposed in the vertical frame edge 4 for the entrance and exit so as to be movable between the standard position and the retracted position. A mechanism that enables the plate 5 to move between the standard position and the retracted position can be realized by a simple link mechanism, and the cost can be reduced.

In the above embodiment, the double-sided horizontal sliding door has been described. However, the same effect can be obtained even when applied to a single-sided horizontal sliding door.
Moreover, although the said embodiment demonstrated the car door, even if it applies to a landing door, the same effect is acquired.

  In the above embodiment, the detection plate is configured to be movable between the standard position and the retracted position by the link mechanism. However, the mechanism for moving the detection plate between the standard position and the retracted position is a link mechanism. It is not limited to. For example, the detection plate is slidably moved between the standard position and the retracted position in the direction of opening and closing of the car door, and a spring is disposed to urge the detection plate to return from the retracted position to the standard position. May be.

  1 car, 2 doorway, 3 car door (horizontal sliding door), 4 vertical frame edge for doorway (door bag), 5 detection plate, 6, 7 link (link mechanism), 10 detection switch (detector), 11 elevator control device ( Control device), 12 door control device (control device), 13 door drive device, 15 foreign matter, B gap.

Claims (2)

A sliding door that opens and closes the elevator doorway,
A door pocket in which the horizontal sliding door is stored;
A standard position that closes a gap formed on the doorway side between the door pocket and the side sliding door over the height direction of the doorway, and a retreat position that is a first distance away from the standard position in the opening direction of the side sliding door. A detection plate disposed in the door pocket so as to be movable between,
A detector for detecting that the detection plate is retracted from the standard position in the opening direction of the side sliding door by a second distance shorter than the first distance;
A door driving device for opening and closing the side sliding door;
A controller that controls the door drive device to close the side door when the detector detects that the detection plate has retracted the second distance during the opening operation of the side door. An elevator door safety device characterized by comprising:   The elevator door safety device according to claim 1, wherein the detection plate is disposed in the door pocket so as to be movable between the standard position and the retracted position by a link mechanism.

Images