JPWO2016013080A1 - Elevator door equipment - Google Patents

Abstract

Provided is an elevator door device capable of accurately and reliably detecting a string-like obstacle sandwiched between doors that open and close an entrance. Therefore, a pair of double-open doors that open and close the entrance of the elevator, a light projecting unit that is provided on one of the pair of doors, and a light projecting unit that is provided on the other of the pair of doors. A light-receiving means for detecting the presence of an obstacle between the pair of doors based on a light-receiving state of the light-receiving means and a door-end member provided at an end of the door-contacting side of one of the pair of doors And the door end member is formed with a guide groove provided across the door landing side and the car side of the door, and a through hole provided at the bottom of the guide groove for restricting light from the light projecting means. The light receiving means is provided so as to be able to receive the light irradiated from the light projecting means and passed through the through-hole, and the detection means is configured to receive the light from the light projecting means in a state where the doorway is fully closed by the door. Detects the presence of string-like obstacles when no light is received

Description

  The present invention relates to an elevator door device.

  In a conventional elevator door device, a projector and a light receiver are provided on both sides of an elevator entrance, and an obstacle is detected when light from the light projector to the light receiver is blocked (for example, Patent Document 1 and Patent Document 2).

Japanese Unexamined Patent Publication No. 08-245147 Japanese Unexamined Patent Publication No. 2012-091903

  However, since the light from the light projecting device is diffusive, in the conventional elevator door device shown in Patent Document 1 and Patent Document 2, for example, the obstacle is in the form of a thin string such as a pet lead. In some cases, part of the light from the light projecting device is blocked by the obstacle, but the light that has passed through the side of the obstacle may be diffused and reach the light receiving device. In such a case, a thin string-like obstacle cannot be detected with high accuracy.

  This invention was made in order to solve such a subject, and can detect a string-like obstacle sandwiched between doors that open and close an elevator door more accurately and more reliably than before. An elevator door device is obtained.

  In the elevator door device according to the present invention, a pair of double-open doors for opening and closing the entrance of the elevator, a light projecting means provided on one of the pair of doors for irradiating light, and the other of the pair of doors A light receiving means for receiving light from the light projecting means; a door end member provided at an end of the door of the pair of doors; and a light receiving state of the light receiving means. And detecting means for detecting the presence of an obstacle between the pair of doors, and the door end member includes a guide groove provided across a landing side and a car side of the door, A through hole provided at the bottom of the guide groove for narrowing the light from the light projecting means, and the light receiving means is provided so as to receive the light irradiated from the light projecting means and passed through the through hole. And the detecting means is The entrance opening by authors when said light receiving means at a fully closed state is not receiving light from said light projecting means, and configured to detect the presence of a string-like said obstacle.

  Alternatively, a single-open door that opens and closes the entrance of the elevator, a door-post column that is arranged in contact with the door-contact side of the door when the door is fully closed by the door, and provided in the door, A light projecting means for irradiating light; a light receiving means for receiving light from the light projecting means; and a door end member provided at an end of the door in the door. Detection means for detecting the presence of an obstacle between the door and the door-to-door pillar based on the light receiving state of the light receiving means, and the door end member is mounted on the landing side of the door. A guide groove provided over the car side, and a through hole provided at a bottom portion of the guide groove for restricting light from the light projecting means, and the light receiving means is irradiated from the light projecting means. Provided so that the light passing through the through hole can be received. The detecting means detects the presence of the string-like obstacle when the light receiving means is not receiving light from the light projecting means with the doorway being fully closed by the door. And

  The elevator door device according to the present invention has an effect that a string-like obstacle sandwiched between doors that open and close the elevator door can be detected more accurately and more reliably than before.

It is a front view of the door apparatus of the elevator which concerns on Embodiment 1 of this invention. It is a block diagram which shows the functional structure of the door apparatus of the elevator which concerns on Embodiment 1 of this invention. It is a figure which shows typically the principal part of the door apparatus of the elevator which concerns on Embodiment 1 of this invention. It is a figure which expands and shows the principal part of the door end member with which the door apparatus of the elevator which concerns on Embodiment 1 of this invention is provided. It is a figure explaining a mode that a string-like obstacle is detected by the door apparatus of the elevator which concerns on Embodiment 1 of this invention. It is a flowchart explaining the operation | movement when the door apparatus of the elevator which concerns on Embodiment 1 of this invention detects a string-like obstacle.

  The present invention will be described with reference to the accompanying drawings. Throughout the drawings, the same reference numerals indicate the same or corresponding parts, and redundant description thereof will be simplified or omitted as appropriate.

Embodiment 1 FIG.
1 to 6 relate to Embodiment 1 of the present invention, FIG. 1 is a front view of an elevator door device, FIG. 2 is a block diagram showing a functional configuration of the elevator door device, and FIG. FIG. 4 is a diagram schematically showing the main part of an elevator door device, FIG. 4 is an enlarged view of the main part of a door end member provided in the elevator door device, and FIG. 5 is a diagram showing a string-like obstacle by the elevator door device. FIG. 6 is a flowchart for explaining an operation when the door device of the elevator detects a string-like obstacle.

  As shown in FIG. 1, the elevator car is provided with a door 10. The door 10 is for opening and closing an entrance provided in front of the car. The door 10 is provided with a pair of left and right. That is, here, the door 10 that opens and closes the doorway of the elevator is a double-open type.

  These doors 10 are moved in a direction to open and close the doorway by the door opening and closing mechanism 20. Next, the door opening / closing mechanism 20 will be described in detail. Door hangers 21 are respectively attached to the upper ends of the pair of doors 10. A door roller 22 is attached to the upper portion of the door hanger 21.

  A girder 23 is provided above the entrance of the car. A door rail 24 is attached to the beam 23. The door rail 24 is disposed along the opening / closing direction of the door 10, that is, substantially horizontally. On the door rail 24, the door roller 22 is engaged so that rolling is possible. In this manner, each door 10 is suspended by the door rail 24 via the door hanger 21 and the door roller 22. The door roller 22 is guided by the door rail 24 and rolls, so that the left and right doors 10 can open and close the entrance / exit.

  The opening / closing operation of the door 10 is driven by a door driving device provided in the door opening / closing mechanism 20. The door drive device is provided at a position above the door rail 24 in the girder 23. The door drive device includes a motor 25, a drive pulley 26, a driven pulley 27, and a belt 28.

  The motor 25 is disposed at a position in the girder 23 that is closer to one side in the opening / closing direction of the door 10. A driving pulley 26 is fixed to the rotating shaft of the motor 25. Further, a driven pulley 27 is attached to a position in the girder 23 that is closer to the other side of the door 10 in the opening and closing direction. An endless belt 28 is wound around the drive pulley 26 and the driven pulley 27. On the inner side of the belt 28, irregularities are provided at equal intervals to form teeth. The drive pulley 26 and the driven pulley 27 are provided with irregularities that match the teeth.

  When the motor 25 is driven to rotate, the drive pulley 26 rotates. Since the teeth of the belt 28 are engaged with the irregularities of the drive pulley 26 and the driven pulley 27, the belt 28 circulates between the drive pulley 26 and the driven pulley 27 when the drive pulley 26 rotates. In this way, a winding transmission mechanism is formed in which the rotational drive of the motor 25 is converted into the circulating movement of the belt 28 and transmitted. The door drive device is constituted by a winding transmission mechanism formed in this way.

  A connecting member 29 is attached to the upper end of the door hanger 21 of each door 10. The connecting member 29 provided on one of the left and right doors 10 is locked to one of the upper and lower belts 28. The connecting member 29 provided on the other door 10 is locked to the other of the upper and lower belts 28.

  The rotational drive in both the forward and reverse directions of the motor 25 of the door drive device is converted into a circular movement of the belt 28 in both directions. At this time, the upper side and the lower side of the belt 28 move in opposite directions. Accordingly, the pair of left and right doors 10 also move in the left and right opposite directions via the connecting member 29, and the doorway is opened and closed.

  The girders 23 are provided with stoppers (not shown) that restrict the movement of the door 10 beyond the fully open position and the fully closed position. The stopper abuts against the end of the door hanger 21 when the door 10 is in a fully open position and a fully closed position, and suppresses further movement of the door 10.

  A light projecting device 41 is attached to one of the left and right doors 10. A light receiving device 42 is attached to the other door 10 of the pair of left and right. The light projecting device 41 is a light projecting unit that emits light in the direction of the light receiving device 42. The light receiving device 42 is a light receiving means that is provided on the other of the pair of doors and receives light from the light projecting device 41 that is a light projecting means.

  The rotational drive of the motor 25 of the door drive device is controlled by the door control device 30. The door control device 30 controls the opening / closing operation of the door 10 by controlling the rotational drive of the motor 25. Next, a functional configuration of the door device for the elevator including the functional configuration of the door control device 30 will be described with reference to FIG.

  As shown in FIG. 2, the door control device 30 includes a motor control unit 31, a door full / close determination unit 32, a door shader detection unit 33, and an input / output port 34. The motor control unit 31 controls the operation of the motor 25.

  Based on the signal output from the door full-close detection device 50, the door full-close determining unit 32 determines whether or not the door 10 is in a position where the door 10 is fully closed (hereinafter simply referred to as “full-closed position”). Judging. The door fully closed detection device 50 outputs a detection signal when the door 10 is in the fully closed position, and does not output a detection signal when the door 10 is not in the fully closed position. The door full-closed detection device 50 includes, for example, a micro switch provided in the beam 23 or an optical switch. The door fully closed determination unit 32 determines that the door 10 is in the fully closed position if a detection signal is output from the door fully closed detection device 50.

  The inter-door light blocking object detection unit 33 is a detection unit that detects the presence of an obstacle between the pair of left and right doors 10 based on the light receiving state of the light receiving device 42 that is a light receiving unit. The light receiving device 42 outputs a signal according to the light receiving state of the light from the light projecting device 41. The light receiving state of the light from the light projecting device 41 means whether the light from the light projecting device 41 is received or whether the light from the light projecting device 41 is not received.

  If the light receiving device 42 receives light, the door-to-door light-blocking object detection unit 33 determines that there is no light-blocking object, that is, an obstacle, between the pair of left and right doors 10. On the other hand, if the light receiving device 42 does not receive light, there is a light blocking object that blocks light from the light projecting device 41 between the light projecting device 41 and the light receiving device 42, that is, between the pair of left and right doors 10. I think that. Therefore, in this case, the door-to-door light blocking object detection unit 33 detects the presence of a light blocking object, that is, an obstacle between the pair of left and right doors 10.

  The input / output port 34 is an interface that mediates exchange of signals (information) between each part of the door control device 30 and the elevator control device 60. The elevator control device 60 is for controlling the overall operation of the elevator including the operation of the car.

  For example, when the car is stopped on the floor where the car is located and the door 10 needs to be opened, the elevator control device 60 outputs a door opening command signal to the door control device 30. The output door opening command signal is input to the door control device 30 via the input / output port 34.

  The motor control unit 31 controls the operation of the motor 25 based on the command signal from the elevator control device 60, the determination result of the door full-close determination unit 32, and the detection result of the door shader detection unit 33. For example, if a door opening command signal from the elevator control device 60 is input, the motor control unit 31 controls the operation of the motor 25 so as to open the door 10. Further, for example, when the operation of the motor 25 is being controlled so as to close the door 10, the door full-close determining unit 32 determines that the door 10 is not in the fully-closed position, and the door-to-door light blocking object detecting unit When 33 detects the presence of an obstacle between the doors 10, the motor control unit 31 interrupts the closing of the door 10 and controls the operation of the motor 25 so that the door 10 is reversed and opened.

  The door-to-door light-blocking object detection unit 33 serving as a detecting means is based on the determination result of the door full-close determination unit 32 and the detection result of the door-light-blocking object detection unit 33, and the presence of a string-like obstacle between the pair of left and right doors Can be detected. Hereinafter, a configuration for detecting the presence of the string-like obstacle will be described with reference to FIGS. 3 to 5.

  A door end member is attached to one door 10 to which the light projecting device 41 is attached among the pair of left and right doors 10. The door end member is provided at an end of the door 10 on the door stop side. The door end member includes a light shielding member 43 and a transparent member 44. The light shielding member 43 is adjacent to the light projecting device 41 side of the transparent member 44. Conversely, the transparent member 44 is adjacent to the light receiving device 42 side of the light shielding member 43. Therefore, the transparent member 44 is disposed at the end of the door 10 closest to the door stop. The light blocking member 43 is made of a material having a property of blocking light from the light projecting device 41. The transparent member 44 is made of a material having a property of allowing light from the light projecting device to pass through.

  The door end member including the light shielding member 43 and the transparent member 44 is formed with a light restricting pinhole 45 and a light shielding object guiding groove 46. The light guide guide groove 46 is a guide groove provided across the landing side and the car side of the door 10. The light limiting pinhole 45 is a through hole for narrowing the light from the light projecting device 41. The light limiting pinhole 45 is formed at the bottom of the light blocking object guiding groove 46.

  In addition, when the shape of the light limiting pinhole 45 is, for example, a circle, the diameter is set to be equal to or smaller than the width of the string-like obstacle to be detected. By doing in this way, the outward light exceeding the width | variety of a light shielding object which becomes difficult to detect a thin string-like light shielding object can be interrupted | blocked. In other words, the light limiting pinhole 45 can limit the light from the light projecting device 41 to the minimum necessary for detecting the string-like obstacle.

  The light limiting pinhole 45 and the light blocking object guiding groove 46 are disposed at positions facing the front surface of the light projecting device 41. In other words, the light limiting pinhole 45 and the light blocking object guiding groove 46 are disposed on the extension line of the light projecting device 41 in the light irradiation direction. Of the light emitted from the light projecting device 41, only the light passing through the light restricting pinhole 45 is irradiated in the direction of the other door 10 through the inside of the light shielding object guiding groove 46. Of the light emitted from the light projecting device 41, light other than the light passing through the light limiting pinhole 45 is shielded by the light shielding member 43.

  In this way, the light emitted from the light projecting device 41 is narrowed down by the light limiting pinhole 45. The light receiving device 42 is disposed on an extension of a line connecting the light projecting device 41 and the light limiting pinhole 45. Therefore, the light receiving device 42 can receive the light irradiated from the light projecting device and passed through the light limiting pinhole 45.

  The light guide guide groove 46 is formed in the transparent member 44. Further, at least a part of the light limiting pinhole 45 is formed in the light shielding member 43. A through hole is also formed at the bottom of the light guide guide groove 46 in the transparent member 44. The through hole and the through hole of the light blocking member 43 are connected to form a continuous light limiting pin hole 45. Is done.

  FIG. 4 is a view of the door end member of the door 10 provided with the light projecting device 41 from the light receiving device 42 side. The light guide guide groove 46 described above is formed on the end face of the door end transparent member 44 on the door end side. The light guide guide groove 46 is provided from the car side of the door 10 to the landing side along the thickness direction of the door 10. The light limiting pinhole 45 is disposed at the center of the door 10 in the thickness direction at the bottom of the light guide guide groove 46.

  The width in the vertical direction of the light guide guide 46 is narrowest at the center in the thickness direction of the door 10 where the light limiting pinhole 45 is disposed. The width in the vertical direction of the shade guiding groove 46 is formed so as to gradually increase toward the landing side and the car side.

  In the elevator door apparatus configured as described above, for example, a case where a string-like light shielding object such as a pet lead exists between the left and right doors 10 from the car side to the landing side, FIG. 3 and FIG. Think with reference. 5 shows the door end member of the door 10 provided with the light projecting device 41 from the light receiving device 42 side as in FIG.

  In such a case, it is assumed that the door 10 is not in the fully closed position and that the string-like light blocking object is in the position indicated by the light blocking object 70 (A) in FIGS. 3 and 5. At this time, the light emitted from the light projecting device 41 through the light restricting pinhole 45 is not blocked by the light blocking object 70 at the position (A). For this reason, the light receiving device 42 receives light from the light projecting device 41. Therefore, if the light receiving device 42 receives light, the door-to-door light-blocking object detection unit 33 determines that there is no light-blocking object, that is, an obstacle, between the pair of left and right doors 10.

  From this state, when the door 10 is fully closed, the string-like light blocking object 70 is sandwiched between the left and right doors 10. Then, for example, when the car rises or a person with the string-shaped light shield 70 moves the light shield 70 downward, the string-shaped light shield 70 remains sandwiched between the left and right doors 10. It moves downward relative to the door 10. Then, the string-like light shielding object 70 enters the light shielding object guiding groove 46 as shown in FIG. 3 and FIG.

  When the string-like light blocking object 70 is in the state shown in FIG. 3 and FIG. 5B, the light from the light projecting device 41 narrowed by the light limiting pinhole 45 is blocked by the light blocking object 70. . Therefore, the light receiving device 42 does not receive the light from the light projecting device 41. In such a case, the door-to-door light-blocking object detector 33 not only detects the presence of an obstacle between the doors 10 but also specifies that the obstacles existing between the doors 10 are string-like. To detect. That is, the inter-door light-shielding object detection unit 33 serving as a detection unit is configured such that the door 10 is in the fully closed position, that is, the doorway is fully closed by the door 10, and the light receiving device 42 receives the light from the light projecting device 41. Is detected, the presence of a string-like obstacle between the pair of left and right doors 10 is detected.

  Here, as described above, the string-like light blocking object 70 is formed in such a manner that the width in the vertical direction of the light blocking object guiding groove 46 gradually increases toward the landing side and the car side. As shown in FIG. 3, even if the vehicle is inclined obliquely from the car side to the landing side, the light shielding object 70 is surely placed in front of the light limiting pinhole 45 by the light shielding object guiding groove 46. Can be guided.

  Further, the width of the light shielding object guiding groove 46 in the vertical direction is gradually increased toward the landing side and the car side so that the string-shaped light shielding object 70 is fitted in the light shielding object guiding groove 46. Even if the car is further raised or lowered, the light blocking object 70 can continue to block the light limiting pinhole 45 for a longer time. Therefore, it is also possible to more reliably detect the string-like light blocking object 70.

  Note that a plurality of sets of the light projecting device 41 and the light receiving device 42 may be provided in the vertical direction of the door 10. In this case, a plurality of light limiting pinholes 45 and light shielding object guiding grooves 46 may be provided according to the number of sets of the light projecting device 41 and the light receiving device 42. However, the number of the light limiting pinholes 45 and the light blocking object guiding grooves 46 should not exceed the number of pairs of the light projecting device 41 and the light receiving device 42.

  More preferably, the light projecting device 41 and the light receiving device 42 with the light restricting pinhole 45 and the light guide guide 46 are disposed at least at the center and the lowermost end of the door 10, respectively. Generally speaking, when a user has one side with a thin string-like obstacle extending from the car side to the landing side, the position is often below the user's chest Conceivable. It is also unlikely that the side of the string-like obstacle that the user has is higher than the position that the user has. Then, when the car is raised and lowered by arranging the light projecting device 41 and the light receiving device 42 with the light restricting pinhole 45 and the light guide guide groove 46 at the center and the lowest end in the vertical direction, respectively. In both cases, it is considered that the light shield 70 can be detected by guiding the string-shaped light shield 70 to the light guide guiding groove 46.

  When the inter-door light blocking object detection unit 33 detects the presence of a string-like obstacle between the pair of left and right doors 10, a string-like obstacle detection signal is output from the door control device 30 to the elevator control device 60. When the string-like obstacle detection signal is input, the elevator control device 60 urgently stops the car if the car is running. Next, the elevator control device 60 travels so as to return the car to the original floor that was stopped immediately before. Then, the car is stopped on the original floor that was stopped immediately before, and the door 10 is opened.

  When the door 10 is not in the door-closed position, the string-shaped light blocking body 70 blocks the light from the light projecting device 41, and the light receiving device 42 stops receiving the light from the light projecting device 41. Since the door 10 is prevented from closing, it is possible to avoid a situation in which the string-like light blocking object 70 is sandwiched between the doors 10.

The flow of operations related to the detection of string-like obstacles in the elevator door device configured as described above will be described once again with reference to the flowchart of FIG.
First, in step S <b> 1, the door full / close determination unit 32 determines whether or not the door 10 is in the fully closed position based on a detection signal from the door full / close detection device 50. If the door 10 is in the fully closed position, the process proceeds to step S2.

  In step S <b> 2, the door-to-door light shielding object detection unit 33 confirms whether or not the light shielding object between the doors 10 is detected based on the light receiving state of the light receiving device 42. When the light shielding object between the doors 10 is not detected, the process returns to step S1. On the other hand, when the light shielding object between the doors 10 is detected, the door 10 is in the door closing position and the light shielding object between the doors 10 is detected. 33 detects the presence of a string-like light shield between the doors 10. In this case, the process proceeds to step S3.

  In step S3, the elevator control device 60 returns the car to the original floor that was stopped immediately before. In step S4, when the car stops at the original floor, the elevator control device 60 opens the door 10. Thus, by opening the door 10 on the original floor, it becomes possible to remove the string-like obstacle sandwiched between the doors 10. In step S4, the operation related to the detection of a series of string-like obstacles ends, and the normal operation control is resumed.

  In addition, the above description was about the double door 10. However, the door 10 is not limited to the double opening type, but may be a single opening type. When the door 10 is a single-opening type, a door-holding pillar is provided that is disposed in contact with the door-stop side of the door 10 when the door 10 is fully closed by the door 10. The light projecting device 41 and the door end member are provided on the door 10, and the light receiving device 42 is provided on the door stop column.

  In the door device for an elevator configured as described above, a door end member (a light shielding member 43 and a transparent member 44) is provided at an end of the door 10 to which the light projecting device 41 is attached. In the member, there is a light guide guiding groove 46 provided on the landing side and the car side of the door 10, and a through hole provided in the bottom of the light guide guiding groove 46 for narrowing light from the light projecting device 41. A certain light limiting pinhole 45 is formed.

  The light receiving device 42 is provided so as to be able to receive the light irradiated from the light projecting device 41 and passed through the light limiting pinhole 45, and the door-to-door light blocking object detection unit 33 is in a state where the doorway is fully closed by the door 10. When the light receiving device 42 does not receive the light from the light projecting device 41, the presence of a string-like obstacle is detected.

  In this way, the light from the light projecting device 41 is narrowed down by the light limiting pinhole 45 so that the light diffused from the side of the thin string-like obstacle is not generated. Further, by providing the light blocking object guiding groove 46 at the position of the light restricting pinhole 45, the thin string-like obstacle between the doors 10 is surely arranged in front of the light restricting pinhole 45 to project light. The light from the device 41 is shielded.

  For this reason, the string-shaped obstacle pinched | interposed into the door which opens and closes the entrance / exit of an elevator can be detected more accurately and more reliably than before.

  INDUSTRIAL APPLICABILITY The present invention can be used for an elevator door device provided with a light projecting device and a light receiving device for detecting an obstacle on both sides of an elevator entrance.

  10 door, 20 door opening / closing mechanism, 21 door hanger, 22 door roller, 23 digit, 24 door rail, 25 motor, 26 driving pulley, 27 driven pulley, 28 belt, 29 connecting member, 30 door control device, 31 motor control unit, 32 Door full-close determination unit, 33 Inter-door light blocking object detection unit, 34 Input / output port, 41 Light projecting device, 42 Light receiving device, 43 Light blocking member, 44 Transparent member, 45 Light limiting pinhole, 46 Light blocking object guiding groove, 50 Fully closed door detection device, 60 Elevator control device, 70 Shading object

Claims (5)

A pair of double doors that open and close the elevator doorway,
A light projecting means provided on one of the pair of doors for irradiating light;
A light receiving means provided on the other of the pair of doors for receiving light from the light projecting means;
A door end member provided at an end portion of the door contact side in the one of the pair of doors;
Detecting means for detecting the presence of an obstacle between the pair of doors based on the light receiving state of the light receiving means;
In the door end member,
A guide groove provided across a landing side and a car side of the door;
Provided at the bottom of the guide groove, and a through hole for narrowing light from the light projecting means is formed,
The light receiving means is provided so as to be able to receive light irradiated from the light projecting means and passed through the through hole,
The detecting means is an elevator door that detects the presence of the string-like obstacle when the light receiving means is not receiving light from the light projecting means with the door fully closed by the door. apparatus. A one-sided door that opens and closes the doorway of the elevator,
A door-holding pillar arranged in contact with the door-stop side of the door when the doorway is fully closed by the door;
A light projecting means provided on the door and irradiating light;
A light receiving means for receiving light from the light projecting means;
A door end member provided at an end of the door in the door contact side;
Detecting means for detecting the presence of an obstacle between the door and the door-to-door pillar based on the light receiving state of the light receiving means;
In the door end member,
A guide groove provided across a landing side and a car side of the door;
Provided at the bottom of the guide groove, and a through hole for narrowing light from the light projecting means is formed,
The light receiving means is provided so as to be able to receive light irradiated from the light projecting means and passed through the through hole,
The detecting means is an elevator door that detects the presence of the string-like obstacle when the light receiving means is not receiving light from the light projecting means with the door fully closed by the door. apparatus.   3. The elevator according to claim 1, wherein the guide groove is formed such that a width of the guide groove is narrowest at a position where the through hole is arranged and gradually increases toward a landing side and a car side. Door device. The door end member is
A light blocking member that is formed with at least a part of the through hole and blocks light from the light projecting means;
The elevator door device according to any one of claims 1 to 3, further comprising: a transparent member that is formed with the guide groove and allows light from the light projecting unit to pass therethrough.   When the said detection means detects presence of the said string-like obstacle, the control means which opens the said door after returning a cage | basket | car to the floor stopped just before is provided. Item 5. The door device for an elevator according to any one of Items 4.

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