JP2011219192A - Elevator door device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator door device detecting a load from the direction perpendicular to a door surface only by a simple structure and performing a door opening action.SOLUTION: The elevator door device comprises: a car door 10; a landing door 11; a light emission means 24 arranged at one end of a car entrance to emit detection light 23 for detecting an object; a light reception sensor 26 arranged at the other end of the car entrance to receive the detection light 23; a door safety 22 arranged in the door closing end part of the car door 10 and displaced by a load to the door opening direction or a load from the direction perpendicular to the door surface of the car door 10 to block the detection light 23 for the load from the perpendicular direction; and a door control part 9 which stops a door closing action of the car door 10 to perform conversion to a door opening action during the door closing action of the car door 10 when the detection light 23 from the light emission means 24 is blocked and not received by the light reception sensor 26.

Description

  The present invention relates to an elevator door device including a door safety that can be displaced not only in a door opening direction but also in a load perpendicular to a door surface.

  The conventional door safety attached to the car door can be displaced only in the door opening direction. If a load is applied to the door safety in the door opening direction during the door closing operation, the door safety is displaced in the door opening direction, and the door control unit reverses the rotation of the door motor and performs the door opening operation to The pinching is prevented (for example, refer to Patent Document 1).

  However, such door safety is displaced only in the load in the door opening direction, and is not displaced in the load perpendicular to the door surface. As a result, there is a possibility that an object cannot be detected even when a passenger, a carriage, or the like collides with the door safety from a direction perpendicular to the door surface during the door closing operation.

  Thus, an elevator door device that performs a door opening operation when a load from a direction perpendicular to the door surface is applied to the door safety has been proposed (for example, see Patent Document 2).

JP-A-60-006580 Japanese Patent Laid-Open No. 2005-200195

  However, the conventional door device as described above has a complicated structure because it is necessary to provide a plate that can be displaced in a direction perpendicular to the door surface and that can detect a vertical load.

  Therefore, an object of the present invention is to provide an elevator door device that detects a load from a direction perpendicular to the door surface with a simple structure and performs a door opening operation.

  In order to achieve the above object, an elevator door device according to the present invention includes a car door that is freely opened and closed at a car doorway, a landing door that is engaged with the car door and opens and closes in conjunction with the opening and closing operation of the car door, A light emitting means for emitting detection light for detecting an object provided at one end of the car doorway in the door opening / closing direction; a light receiving sensor for receiving the detection light provided at the other door opening / closing direction of the car doorway; Disposed by the load in the door opening direction of the car door and the load from the direction perpendicular to the door surface of the car door. A safety mechanism configured to block the detection light with respect to the displacement of the load of the car, and when the load in the door opening direction is received during the door closing operation of the car door and from the light emitting means. A door control unit that stops the door closing operation of the car door and reverses the door opening operation when the detection light is blocked and the light receiving sensor cannot receive the detection light. .

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the elevator door apparatus which detects the load from a direction perpendicular | vertical with respect to a door surface only by simple structure, and performs door opening operation | movement.

It is a lineblock diagram showing the whole elevator concerning an embodiment of the present invention. It is a figure which shows the internal detail of the structure of the elevator door apparatus which concerns on embodiment of this invention, and the connection structure of an arm and door safety. It is sectional drawing which shows the structure of the safety mechanism which concerns on embodiment of this invention. It is sectional drawing which shows the detail of the elevator door apparatus which concerns on embodiment of this invention. It is sectional drawing which shows the displacement by the load from the landing side with respect to a door safety in the structure of the elevator door apparatus which concerns on embodiment of this invention. It is sectional drawing which shows the displacement by the load from the cage | basket | car side with respect to a door safety in the structure of the elevator door apparatus which concerns on embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a configuration diagram showing an entire elevator according to an embodiment of the present invention. FIG. 2 is a diagram showing the internal details of the structure of the elevator door device and the connecting structure between the arm and the door safety according to the embodiment of the present invention. 3 is a cross-sectional view showing an XX cross section in the enlarged detail view of FIG. 2 showing the configuration of the safety mechanism according to the embodiment of the present invention. 4 is a cross-sectional view showing a YY cross section in FIG. 2 of the elevator door apparatus according to the embodiment of the present invention. FIG. 5 is a cross-sectional view taken along the line YY in FIG. 2 showing displacement due to a load from the landing side with respect to the door safety in the configuration of the elevator door device according to the embodiment of the present invention. 6 is a cross-sectional view taken along the line YY in FIG. 2 showing displacement due to a load from the car side with respect to the door safety in the configuration of the elevator door device according to the embodiment of the present invention.

  In the present embodiment, a case is considered in which a load by a human fingertip is applied to the door safety from the clearance of the landing door.

  Normally, door safety is not equipped with a mechanism that displaces in response to a load from a direction perpendicular to the door surface, and even if a passenger or a truck collides from a direction perpendicular to the door surface, No detection is performed. Furthermore, in the case where foreign objects are detected between the car doors using a plurality of detection lights, foreign objects can be used as long as the detection lights are surely blocked more than the width between the detection lights, such as passengers and carts as described above. Although detection is possible, when a foreign object or the like that is smaller than the width between the detection lights enters the gap between the detection lights from a direction perpendicular to the door surface, there is a possibility that the detection light may not detect them.

  Therefore, in the present embodiment, even when foreign matter enters a gap between detection lights from a direction perpendicular to the door surface between doors immediately before the door is closed, the elevator door can reliably detect the foreign matter. The configuration of the device.

  First, the structure of the whole elevator which concerns on embodiment of this invention is demonstrated using FIG.

  As shown in FIG. 1, a machine room 101 is provided with a hoist 1, an elevator controller 2, and a deflecting sheave 3. In an elevator that does not have a machine room, the hoisting machine 1 and the deflecting sheave 3 described above are provided on a top support beam (not shown) provided on the top of the hoistway 7, and the elevator control unit 2 is provided on the wall of the hoistway 7. The car 5 moves up and down in the hoistway 7 by the hoist 1 via the rope 6.

  A counterweight 8 is provided at the other end of the rope 6 that suspends the car 5. A car door 10 that can be freely opened and closed is provided at the entrance of the car 5, and a hall door 11 that engages with the car door 10 when the car 5 is landed and performs a door opening operation in conjunction with the car door 10 is provided.

  A door control unit 9 is provided on the upper side of the car 5, and the door control unit 9 opens and closes the car door 10 when the car 5 is landed to allow passengers to get on and off. The door control unit 9 is connected to the elevator control unit 2 by the tail cord 4 and can communicate therewith.

  Next, the configuration of the safety mechanism in the elevator door device according to the embodiment of the present invention will be described with reference to FIGS. Although details will be described later, the safety mechanism supports an arm provided on the car door 10, a fixed portion fixed to the arm, a shaft fixed to the fixed portion and serving as a center of rotation of the door safety, and the shaft. A bearing portion that rotates together with the door safety and an elastic body provided in the door safety so that the rotated door safety has a restoring force.

  FIG. 2 shows the front of the elevator door device as viewed from the landing direction. A door safety 22 is provided on the door closing end side of the car door 10 via a connection structure described later. In the safety mechanism in the present embodiment, the door safety 22 is provided so as to be displaceable with respect to a load in the door opening direction and a load from a direction perpendicular to the door surface.

  In addition, a light projecting portion 25 having a plurality of light projecting means 24 for projecting detection light 23 for detecting an object is received at one of the car entrance / exit end portions, and the other receives the detection light 23 so as to correspond to the light projecting means 24. A light receiving unit 27 having a plurality of light receiving sensors 26 is provided. The light emitting part 25 and the light receiving part 27 are fixed to the car entrance / exit end part by an attachment member 31 provided on the car support 28. Side plates 32 are provided on the car posts 28 provided at both ends of the car 5 entrance so as to overlap the car door 10 when the door is opened.

  A header 29 is provided at the upper part of the car doorway, and a door control unit 9 and a door motor 30 are provided at the upper part of the car. When the door control unit 9 determines that there is a load in the door opening direction with respect to the door safety 22, or when it is determined that there is a load from a direction perpendicular to the door surface described later, the door motor 30 is rotated. The car door 10 is set to be opened by stopping and reversing.

  The door safety 22 is connected to the car door 10 by a connecting structure. Specifically, as shown in the enlarged detail view of FIG. 2, the shaft 41 is fixed to the arm 21 via a fixing portion 43. Further, the bearing portion 42 provided in the door safety 22 is provided so as to be rotatable with respect to the shaft 41 together with the door safety 22.

  When a load from a direction perpendicular to the door surface is applied to the door safety 22 with the above configuration, the door safety 22 can be rotated about the shaft 41.

  FIG. 3 is a top view of the XX cross section in FIG.

  The safety mechanism in the present embodiment further provides a spring 51 (elastic body) in the door safety 22 so that the door safety 22 displaced by a load from a direction perpendicular to the door surface has a restoring force. Provide on both sides.

  The method for attaching the spring 51 is not particularly limited, but in this embodiment, one end of the spring 51 is on each side of the fixed portion 43, and the other end is in the direction toward the front end of the door safety 22. 22 are respectively fixed to the inner surface and provided so as to be oblique as a whole with respect to the door opening direction.

  When the door safety 22 is rotated by the above configuration, the spring 51 provided on the surface to which the load is applied is extended, and the spring 51 provided on the surface opposite to the surface to which the load is applied is contracted. Has a restoring force to return to its original length. Therefore, when the load is lost, the door safety 22 returns to the normal reference position. Here, the normal reference position refers to the position state shown in FIG.

  Next, the installation of the light emitting unit 25 and the light receiving unit 27 will be described with reference to FIG. In FIG. 4 and subsequent figures, the description of the light emitting part 25 and the light emitting means 24 is omitted, but it is the same as the attachment of the light receiving part 27 and the light receiving sensor 26 shown in the figure.

  4 is a view as seen from above in the YY section in FIG.

  The light emitting means 24 and the light receiving sensor 26 are provided at a location where the above-described detection light 23 passes through the gap between the door safety 22 provided on the car door 10 and the landing door 11.

  Specifically, the light emitting unit 25 and the light receiving unit 27 are attached so as to correspond to the attachment members 31 provided on the support column 28, respectively. One outer side surface of the attachment member 31 having a U-shaped cross section is fixed to the support column 28, and the light emitting unit 25 and the light receiving unit 27 are provided on the other outer side surface, respectively.

  The locations where the light emitting means 24 and the light receiving sensor 26 are installed are limited to the locations shown in FIG. 2 as long as the detected light 23 is not blocked by the door safety 22, the car door 10, or the arm 21. I can't. For example, the light emitting means 24 and the light receiving sensor 26 may be provided so that the detection light 23 passes between the car door 10 and the door safety 22 or may be provided directly on the car door 10 or the like.

  Next, the operation of the elevator door device according to the present invention will be described with reference to FIG.

  In the present embodiment, as shown in FIG. 5, a case is considered in which a load is applied to the door safety 22 from the landing 100 side by the human fingertip passing between the detection lights 23. As described above, when a load is applied from the landing 100 side, the door safety 22 rotates about the shaft 41 as described above. That is, at this time, the door safety 22 rotates over the entire height of the car 5 entrance.

  Then, the rotated door safety 22 blocks the detection light 23. When the elevator control unit 2 determines that the light receiving unit 27 cannot receive the detection light 23 due to the detection light 23 from the light emitting unit 25 being blocked, the elevator control unit 2 causes the door control unit 9 to rotate the door motor 30. The car door 10 is opened by stopping and reversing.

  That is, specifically, when a load is applied to the door safety 22 from a direction perpendicular to the door surface from the landing 100 side, the front end of the door safety 22 is pushed and rotated inside the car. As a result of the rotation, the rear end of the door safety 22 blocks the detection light 23, and the light receiving unit 27 cannot detect the detection light 23.

  On the other hand, as shown in FIG. 6, when a load is applied to the door safety 22 from the direction perpendicular to the door surface from the inside of the car, the tip of the door safety 22 is pushed toward the landing 100 side to rotate. As a result, the front end of the door safety 22 blocks the detection light 23, and the light receiving unit 27 cannot detect the detection light 23.

  When the elevator control unit 2 determines that the light receiving unit 27 can no longer detect the detection light 23, the car door 10 is reversed and opened.

  That is, when the door safety 22 receives a load from a direction perpendicular to the door surface from the inside of the car or the landing 100 side, the front end of the door safety 22 emits the detection light 23 before the rear end of the door safety 22 contacts the car door 10. A shaft 41 serving as a rotation center is provided in the door safety 22 so that the rear end of the door safety 22 blocks the detection light 23 before the front end of the door safety 22 contacts the car door 10.

  In the present embodiment, as shown in FIGS. 3 to 6, the shaft 41 is provided on the rear side of the center in the door safety 22, but not limited to that, the shaft 41 is on the tip side of the center or center in the door safety 22. It may be provided.

  As described above, when a load is applied to the door safety 22, the springs 51 provided on the opposite surface and the opposite surface have a restoring force. The door safety 22 returns to the normal reference position and is not receiving a load. Therefore, once the car door 10 is fully opened, the door control unit 9 performs the door closing operation again.

DESCRIPTION OF SYMBOLS 1 ... Hoisting machine 2 ... Elevator control part 3 ... Warp sheave 4 ... Tail cord 5 ... Car 6 ... Rope 7 ... Hoistway 8 ... Counterweight 9 ... Door control part 10 ... Car door 11 ... Landing door 21 ... Arm 22 ... Door safety 23 ... detection light 24 ... light emitting means 25 ... light emitting part 26 ... light receiving sensor 27 ... light receiving part 28 ... support 29 ... header 30 ... door motor 31 ... mounting member 32 ... side plate 41 ... shaft 42 ... bearing part 43 ... fixing part 51 ... Spring 100 ... Place 101 ... Machine room

Claims (2)

A car door that can be freely opened and closed at the car doorway;
A landing door that is engaged with the car door and opens and closes in conjunction with the opening and closing operation of the car door;
A illuminating means provided at one end of the car doorway in the door opening / closing direction and illuminating detection light for detecting an object;
A light receiving sensor that is provided at the other end of the car doorway in the door opening and closing direction and receives the detection light;
Disposed by the load in the door opening direction of the car door and the load from the direction perpendicular to the door surface of the car door. A safety mechanism configured to block the detection light with respect to displacement of the load;
During the door closing operation of the car door, when receiving a load in the door opening direction and when the detection light emitted from the light emitting means is blocked and the light receiving sensor cannot receive the detection light, A door control unit that stops the door closing operation of the car door and reverses the door opening operation;
An elevator door device comprising: The safety mechanism is
Door safety,
An arm whose one end is pivotally supported by the car door;
A shaft provided inside the door safety so as to be fixed to a fixing portion that pivotally supports the other end of the arm, and having an axial direction in the height direction of the car door;
A bearing portion provided inside the door safety to support the shaft, and rotated together with the door safety by a load from a direction perpendicular to the door surface of the car door;
An elastic body provided between the fixed portion and the door safety such that the door safety has a restoring force with respect to the rotation;
The elevator door device according to claim 1, comprising:

Images