JP2012201418A - Foreign material detecting device and door device for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foreign material detecting device or the like more accurately detecting an elongated foreign material.SOLUTION: The foreign material detecting device 18 includes a first detector 31, a plurality of second detectors 32, a plurality of actuating members 33, a circuit unit 34, and an electric conduction detection unit 35. The first detector 31 is disposed on one side with a surface along which doors for closing/opening a doorway of an elevator car are mutually closed up sandwiched. The plurality of second detectors 32 are disposed on the other side with the surface along which the doors are mutually closed up sandwiched, facing the first detector 31, and are arrayed along the first detector 31. The plurality of actuating members 33 respectively actuate the plurality of second detectors 32 toward the first detector 31 side. The circuit unit 34 is made electrically conductive by bringing all the second detectors 32 into face-to-face contact with the first detector 31 when door closing. The electric conduction detection unit 35 detects whether the circuit unit 34 is in an electrically conductive state or not when door closing.

Description

  Embodiments described herein relate generally to a foreign object detection device and an elevator door device.

  2. Description of the Related Art Conventionally, a door safety device that detects whether or not an elongated foreign object such as a string, a rope, or a cord is sandwiched between elevator doors is known (see, for example, Patent Document 1).

JP 2010-37015 A

  The problem to be solved by the present invention is to provide a foreign object detection device and an elevator door device capable of more accurately detecting elongated foreign objects.

  The foreign object detection device of the present invention includes a first detector, a plurality of second detectors, a plurality of urging members, a circuit unit, and an energization detection unit. The first detector is provided on one side across a closing surface of a door that opens and closes an entrance / exit of an elevator car. The plurality of second detectors are provided on the other side across the closing surface of the door so as to face the first detector, and are arranged along the first detectors. The plurality of urging members respectively urge the plurality of second detectors toward the first detector side. The circuit portion can be energized when all the second detectors come into contact with the first detector when the door is closed. The energization detection unit detects whether or not the circuit unit is energized when the door is closed.

FIG. 1 is a partial plan view schematically showing the periphery of an elevator door device according to the present embodiment. FIG. 2 is a schematic diagram illustrating the elevator foreign matter detection apparatus according to the present embodiment. FIG. 3 is an external perspective view of the first detector and the second detector according to the present embodiment. FIG. 4 is a schematic diagram showing adjacent second detectors according to the present embodiment. FIG. 5 is a flowchart for explaining the closing operation of the elevator according to the present embodiment. FIG. 6 is a flowchart illustrating the opening operation of the elevator according to the present embodiment.

Embodiment
FIG. 1 is a partial plan view schematically showing the periphery of an elevator door device according to the present embodiment. FIG. 2 is a schematic diagram illustrating the elevator foreign matter detection apparatus according to the present embodiment. FIG. 3 is an external perspective view of the first detector and the second detector according to the present embodiment. FIG. 4 is a schematic diagram showing adjacent second detectors according to the present embodiment. FIG. 5 is a flowchart for explaining an example of control during the closing operation of the elevator according to the present embodiment. FIG. 6 is a flowchart illustrating an example of control during the opening operation of the elevator according to the present embodiment.

  As shown in FIG. 1, the door device 10 of the elevator 1 on which the foreign object detection device 18 of the present embodiment is mounted is provided at the entrance 7 between the passenger car 5 and the landing 6. The door device 10 includes a car door (door) 15, a hold door 16, a safety shoe 17, a foreign object detection device 18, an interlocking mechanism 19, and a door control unit 20.

  A pair of card doors 15 is provided on the side of the car basket 5, and the pair of card doors 15 is of a double-open type. In the pair of card doors 15, the width direction of the entrance / exit 7 is the opening / closing direction. In particular, in the opening / closing direction, the closing direction of the pair of card doors 15 is the closing direction, and the opening direction of the pair of card doors 15 is the opening direction. It has become. The pair of card doors 15 opens and closes while a power source (not shown) is controlled by the door control unit 20. Each card door 15 has a closed end surface in the closing direction that closes when the card doors 15 come into contact with each other.

  A pair of holders 16 are provided on the landing 6 side, and the pair of holders 16 is of a double-open type. The pair of hold doors 16 are provided to face the pair of card doors 15 respectively. As with the pair of card doors 15, the pair of hold doors 16 has an opening / closing direction in the width direction of the entrance / exit 7. The pair of hold doors 16 are configured to perform an opening / closing operation in conjunction with an opening / closing operation of the pair of card doors 15.

  The safety shoe 17 detects whether there is an obstacle at the entrance 7 of the elevator 1. The safety shoe 17 is provided between each card door 15 and each hold door 16, and is also provided at each end of the pair of card doors 15 in the closing direction. Each safety shoe 17 can be advanced and retracted between the forward position and the backward position in the closing direction. For this reason, the pair of safety shoes 17 moves ahead of the pair of card doors 15 when the pair of card doors 15 is closed.

  The pair of safety shoes 17 are respectively in the forward position when the pair of card doors 15 is closed. When the pair of safety shoes 17 hit the obstacle and move from the forward position to the backward position, the pair of safety shoes 17 outputs a detection signal indicating that there is an obstacle to the door control unit 20. On the other hand, when the pair of safety shoes 17 is closed, the safety shoes 17 abut against each other without hitting an obstacle. When the pair of safety shoes 17 are relatively moved to the retracted position by the contact of the pair of card doors 15, it is determined that there is no obstacle and does not output a detection signal to the door control unit 20.

  In the present embodiment, the card door 15 and the hold door 16 are of double opening type, but may be of single opening type. In this case, the safety shoe 17 is provided in one card door 15 that performs an opening / closing operation.

  As shown in FIGS. 1 to 3, the foreign object detection device 18 detects elongated foreign objects such as strings and ropes. The foreign object detection device 18 includes a first detector 31, a plurality of second detectors 32, a circuit unit 34, a plurality of urging members 33, a support body 36, and an energization detection unit 35. Has been.

  The first detector 31 is provided on one side (left side in FIG. 1) across the closing surface of the pair of card doors 15. The first detector 31 is a long object that is long in the height direction (vertical direction) of the card door 15, and is attached to the card door 15. For this reason, the first detector 31 is a fixed detector. In the present embodiment, the first detector 31 is fixed. However, the present invention is not limited to this configuration, and the first detector 31 may be configured to advance and retract in the closing direction.

  The first detector 31 has a first contact surface 41 that contacts the plurality of second detectors 32. The first contact surface 41 is a front end surface of the first detector 31 in the closing direction. The first contact surface 41 is formed with a recess 43 that immerses outside in the opening / closing direction of the card door 15. The recess 43 includes a flat surface 43a serving as a bottom surface and a pair of first slope portions 43b provided so as to spread outward from both sides of the flat surface 43a, and has a trapezoidal shape in a horizontal plane perpendicular to the vertical direction. Is formed. The recess 43 is formed to extend in the longitudinal direction (vertical direction) of the first detector 31. In addition, in this embodiment, although the recessed part 43 was formed in trapezoid shape, it is not limited to this shape. That is, the recessed part 43 should just have the 1st slope part 43b at least, for example, may be formed in circular arc shape.

  The plurality of second detectors 32 are provided on the other side (the right side in FIG. 1) across the closing surface of the pair of card doors 15 so as to face the first detector 31. The plurality of second detectors 32 are arranged along the first detector 31 in the height direction of the card door 15. The plurality of second detectors 32 are configured to be able to advance and retract in the closing direction. For this reason, the second detector 32 is a movable detector.

  As shown in FIG. 4, the plurality of second detectors 32 are configured such that one end of one adjacent second detector 32 and the other end of the other adjacent second detector 32 are mutually connected. It overlaps. Specifically, the lower end portion of the upper second detector 32 has a recess 46 that is recessed upward in the height direction of the card door 15. On the other hand, the lower end of the second detector 32 has a convex portion 47 that protrudes upward in the height direction of the card door 15. The concave portion 46 and the convex portion 47 are formed across the opening / closing direction of the second detector 32. For this reason, when the concave portion 46 and the convex portion 47 are combined, the adjacent second detectors 32 are allowed to move in the opening / closing direction using the concave portion 46 and the convex portion 47 as a guide. Further, even if the foreign matter reaches the overlap portion 49 where the concave portion 46 and the convex portion 47 are combined, the foreign matter comes into contact with at least the concave portion 46 or the convex portion 47.

  Each second detector 32 has a second contact surface 42 that contacts the first contact surface 41 of the first detector 31. The second contact surface 42 is a front end surface of the second detector 32 in the closing direction. The second contact surface 42 is formed with a convex portion 44 that protrudes inward in the opening / closing direction of the card door 15. The convex portion 44 is composed of a flat surface 44a serving as a top surface and a pair of second slope portions 44b provided so as to spread inward from both sides of the flat surface 44a, and in a horizontal plane perpendicular to the vertical direction. It is formed in a trapezoidal shape. The convex portion 44 is formed to extend in the longitudinal direction (vertical direction) of the second detector 32. In the present embodiment, the convex portion 44 is formed in a trapezoidal shape similarly to the concave portion 43, but is not limited to this shape. That is, the convex part 44 should just have the 2nd slope part 44b at least, and may be formed in circular arc shape, for example.

  The concave portion 43 of the first contact surface 41 and the convex portion 44 of the second contact surface 42 are formed so as to be complementary to each other, and the concave portion 43 of the first contact surface 41 is The convex portion 44 of the second contact surface 42 is allowed.

  The circuit unit 34 is provided so as to form a series circuit in a state where the first detector 31 and all the second detectors 32 are in contact with each other. A pair of the circuit portions 34 is provided according to the pair of first slope portions 43b and the pair of second slope portions 44b. In the following, the circuit portion 34 provided on one first slope portion 43b and one second slope portion 44b will be described. The circuit unit 34 includes a plurality of first electric wires 51, a plurality of second electric wires 52, a plurality of first electrodes 53, and a plurality of second electrodes 54.

  As shown in FIG. 2, the plurality of first electric wires 51 includes an input-side electric wire 61, a plurality of first curved electric wires 62, and an output-side electric wire 63. The input-side electric wire 61 is provided at the upper end of the first detector 31, passes from the outside of the first detector 31 to the inside of the first detector 31, and the first contact surface 41 of the first detector 31. It is arranged to reach. Each first curved electric wire 62 is formed in a U-shape, passes through the inside of the first detector 31 from the first contact surface 41 of the first detector 31, and again returns to the first pair of the first detector 31. It is disposed so as to reach the contact surface 41. In addition, each first curved electric wire 62 is disposed such that the upper end portion thereof faces the lower end portion of the adjacent upper second detector 32, and the lower end portion thereof is adjacent to the lower second detection. It arrange | positions so that the upper end part of the child 32 may be opposed. The output-side electric wire 63 is provided at the lower end portion of the first detector 31 and passes through the inside of the first detector 31 from the first contact surface 41 of the first detector 31 to the outside of the first detector 31. It is arranged to reach.

  The plurality of second electric wires 52 are respectively provided on the plurality of second detectors 32. Each of the second electric wires 52 is formed in a U-shape, passes through the inside of the second detector 32 from the second contact surface 42 of the second detector 32, and again returns to the second contact of the second detector 32. Arranged to reach the surface 42. Further, each second electric wire 52 is arranged so that the upper end portion thereof faces the lower end portion of the first curved electric wire 62, and the lower end portion thereof is arranged so as to face the upper end portion of the first curved electric wire 62. It is installed. The second electric wire 52 provided in the second detector 32 on the uppermost side in the vertical direction is arranged so that the upper end portion thereof faces the input-side electric wire 61. Further, the second electric wire 52 provided in the second detector 32 on the lowermost side in the vertical direction is arranged so that the lower end portion thereof faces the output-side electric wire 63.

  The plurality of first electrodes 53 are respectively provided on the first slope portion 43 b of the first contact surface 41 of the first detector 31. The plurality of first electrodes 53 are connected to the input side electric wires 61, the plurality of first curved electric wires 62, and the output side electric wires 63, respectively. That is, among the plurality of first electrodes 53, the first electrode 53 on the uppermost side in the vertical direction is connected to the end portion on the first contact surface 41 side of the input-side electric wire 61, and the first inclined surface portion 43b. It is arranged on the uppermost side in the vertical direction. In addition, among the plurality of first electrodes 53, the first electrode 53 on the lowermost side in the vertical direction is connected to the end portion on the first contact surface 41 side of the output-side electric wire 63, and the first inclined surface portion 43b. Is disposed on the lowermost side in the vertical direction. Further, the other first electrodes 53 are respectively connected to both end portions of the first curved electric wire 62 and disposed on the first inclined surface portion 43b. In the present embodiment, the first electrodes 53 are connected to both ends of the first curved wire 62. However, the first curved wires 62 are omitted and the first electrodes 53 at both ends of the first curved wire 62 are connected to each other. May be.

  The plurality of second electrodes 54 are provided so as to face the plurality of first electrodes 53, and are respectively provided on the second inclined surfaces 44 b on the second contact surfaces 42 of the plurality of second detectors 32. The plurality of second electrodes 54 are connected to the second electric wire 52. That is, the plurality of second electrodes 54 are connected to both end portions of each second electric wire 52 and disposed on the second inclined surface portion 44b.

  In the circuit unit 43 configured as described above, when all the second detectors 32 are in contact with the first detector 31, the plurality of first electrodes 53 and the plurality of second electrodes 54 are in contact with each other. Thereby, as for the circuit part 34, the input side electric wire 61 and the 2nd electric wire 52 are connected, the 2nd electric wire 52 and the 1st curved electric wire 62 are connected, and the 1st curved electric wire 62 and the 2nd electric wire 52 are connected. Then, the connection between the first curved electric wire 62 and the second electric wire 52 is repeated, and the second electric wire 52 and the output-side electric wire 63 are connected. That is, the circuit unit 34 becomes a series circuit by connecting the plurality of first electric wires 53 and the plurality of second electric wires 54 in series. And the circuit part 34 will be in the state which can supply with electricity because the circuit part 34 becomes a series circuit.

  The support 36 supports the plurality of second detectors 32 via a plurality of biasing members 33 described below. The support 36 is a long object that is long in the vertical direction, and is attached to the card door 15 so as to be able to advance and retreat in the closing direction. That is, the support body 36 moves between the forward movement position and the backward movement position in the closing direction. The support 36 moves back and forth in conjunction with the movement of the safety shoe 17.

  The plurality of urging members 33 are interposed between the plurality of second detectors 32 and the support 36 and elastically support the plurality of second detectors 32. The plurality of urging members 33 urge the plurality of second detectors 32 toward the first detector 31. The urging member 33 is provided on each of the upper end side and the lower end side of each second detector 32.

  The energization detection unit 35 detects whether or not the circuit unit 34 is in an energized state (series circuit), that is, whether or not all the second detectors 32 are in contact with the first detector 31. is there. An input side electric wire 61 and an output side electric wire 63 are connected to the energization detection unit 35, and the energization detection unit 35 can output an electric signal toward the input side electric wire 61. And the energization detection part 35 outputs an electrical signal toward the input side electric wire 61, and if an electric signal is not input from the output side electric wire 63, the circuit part 34 will not be in an energized state, and that the elongate foreign object is pinched | interposed Is output to the door control unit 20. On the other hand, the energization detection unit 35 outputs an electric signal toward the input side electric wire 61, and when an electric signal is input from the output side electric wire 63, the circuit unit 34 is in an energized state, and the abnormality detection signal is output to the door. It does not output to the control unit 20.

  The interlocking mechanism 19 is configured to cause the plurality of second detectors 32 to advance and retract via the support 36 and the plurality of urging members 33 in conjunction with the advance and retreat operation of the safety shoe 17. The interlocking mechanism 19 is configured using, for example, a link mechanism, but is not limited to this configuration, and may be configured using a cam mechanism, a rack and pinion, or the like. When the safety shoe 17 moves to the retracted position in the closing direction, the interlocking mechanism 19 moves the support 36 of the foreign object detection device 18 to the advanced position in the closing direction, thereby moving the plurality of second detectors 32 to the first detector. It is made to contact 31. On the other hand, when the safety shoe 17 moves to the advanced position in the closing direction, the interlocking mechanism 19 moves the support 36 of the foreign object detection device 18 to the retracted position in the closing direction, thereby moving the plurality of second detectors 32 to the first position. 1 away from the detector 31.

  The door control unit 20 controls the opening / closing operation of the card door 15 by controlling a power source (not shown). Specifically, when the detection signal output from the safety shoe 17 is input during the closing operation of the card door 15, the door control unit 20 switches from the closing operation of the card door 15 to the opening operation of the card door 15. Further, when the foreign object detection signal output from the energization detection unit 35 of the foreign object detection device 18 is input during the closing operation of the card door 15, the door control unit 20 starts the opening operation of the card door 15 from the closing operation of the card door 15. Switch to.

  Next, a series of operation flows related to the closing operation of the pair of card doors 15 will be described with reference to FIG. First, the door control unit 20 controls the power source to cause the pair of card doors 15 to close (step S1). Then, the pair of hold doors 16 performs a closing operation in conjunction with the closing operation of the pair of card doors 15. At this time, the pair of safety shoes 17 provided at the front ends of the pair of card doors 15 in the closing direction detects whether or not there is an obstacle at the entrance 7 of the elevator 1 (step S2).

  When the detection signal is input by the pair of safety shoes 17 (step S2: Yes), the door control unit 20 temporarily opens the pair of card doors 15 (step S3), and then proceeds to step S1 again. Thus, the card door 15 is closed. On the other hand, the door control unit 20 does not receive a detection signal from the pair of safety shoes 17 (step S2: No), and the pair of safety shoes 17 come into contact with each other and move to the retracted position. Then, by movement of the safety shoe 17 on the right side of the figure, the support body 36, the plurality of urging members 33, and the plurality of second detectors 32 are integrally moved to the advance position via the interlocking mechanism 19, thereby The second detector 32 is brought into contact with the first detector 31 (step S4).

  When the plurality of second detectors 32 are brought into contact with the first detector 31, the recesses 43 in the first contact surface 41 of the first detector 31 are brought into contact with the second contact surfaces 42 of the second detectors 32. The convex portions 44 are combined. At this time, the first electrode 53 provided on the first slope portion 43b of the first contact surface 41 and the second electrode 54 provided on the second slope portion 44b of the second contact surface 42 are the same as the car door 15. It contacts diagonally with respect to the closing direction. Thereby, the 1st electrode 53 and the 2nd electrode 54 are rubbed and contacted. Further, since the plurality of second detectors 32 are overlapped with the concave portion 46 of the upper second detector 32 and the convex portion 47 of the lower second detector 32 in the overlap portion 49, The second detector 32 moves individually in the opening and closing direction using the concave portion 46 and the convex portion 47 as a guide.

  Then, after bringing the plurality of second detectors 32 into contact with the first detector 31, the door control unit 20 outputs an electrical signal from the energization detection unit 35 to the input-side electric wire 61 of the circuit unit 34. It is determined whether or not there is an abnormality detection signal (step S5). Thereafter, when an electrical signal is not input from the output-side electric wire 63 of the circuit unit 34, the energization detection unit 35 outputs an abnormality detection signal to the door control unit 20 assuming that the circuit unit 34 is not energized (step S5: Yes). ). When an abnormality detection signal is input from the foreign object detection device 18, the door control unit 20 temporarily opens the card door 15 (step S3), and then proceeds to step S1 again to close the card door 15. .

  On the other hand, when an electrical signal is input from the output-side electric wire 63 of the circuit unit 34, the energization detection unit 35 assumes that the circuit unit 34 is in an energized state and does not output an abnormality detection signal to the door control unit 20 (step S5). : No). The door control unit 20 continues the closing operation of the card door 15 because no abnormality detection signal is input by the foreign object detection device 18 (step S6).

  Then, the door control unit 20 detects whether or not the closing operation of the card door 15 has been completed (step S7), and when detecting that the closing operation has ended (step S7: Yes), the door closing operation of the pair of card doors 15 is performed. Exit. On the other hand, when the door control unit 20 detects that the closing operation has not ended (step S7: No), the door control unit 20 proceeds to step S1 again and causes the card door 15 to perform the closing operation.

  Next, with reference to FIG. 6, a series of operation flows of the foreign object detection device 18 during the opening operation of the pair of card doors 15 will be described. First, when the elevator car 5 of the elevator 1 reaches the predetermined landing 6 (step S11), the door control unit 20 outputs an electrical signal from the energization detection unit 35 to the input-side electric wire 61 of the circuit unit 34. Then, it is determined whether there is an abnormality detection signal (step S12).

  If an electric signal is not input from the output-side electric wire 63 of the circuit unit 34, the energization detection unit 35 outputs an abnormality detection signal to the door control unit 20 assuming that the circuit unit 34 is not in an energized state (step S12: Yes). Then, the door control unit 20 determines that the foreign object detection device 18 is out of order, and notifies the management company that manages the elevator 1 that the foreign object detection device 18 is out of order (step S13). Then, after step S13, the door control unit 20 opens the pair of card doors 15 (step S14).

  On the other hand, in step S <b> 12, when an electrical signal is input from the output-side electric wire 63 of the circuit unit 34, the energization detection unit 35 outputs an abnormality detection signal to the door control unit 20 assuming that the circuit unit 34 is in an energized state. No (Step S12: No). Then, the door control unit 20 does not perform step S13, but opens the pair of card doors 15 (step S14).

  As described above, according to the configuration of the present embodiment, since the plurality of second detectors 32 are arranged along the first detector 31, the length of each second detector 32 is set to the first detector 31. It can be shortened compared to. For this reason, the 2nd detector 32 becomes difficult to bend because the length became short. As a result, even when an elongated foreign object is sandwiched between the first detector 31 and the second detector 32, the second detector 32 is difficult to bend. Therefore, the first detector 31 and the second detector 32 are not bent. The gap between them can be suitably maintained. Therefore, the foreign object detection device 18 can detect the foreign object with high accuracy when an elongated foreign object is caught.

  Further, according to the configuration of the present embodiment, the concave portion 43 is provided on the first contact surface 41, the convex portion 44 is provided on the second contact surface 42, and the concave portion 43 and the convex portion 44 that are complementary to each other are provided. Can be formed. For this reason, when an elongated foreign object is sandwiched between the first contact surface 41 and the second contact surface 42, a gap is generated between the elongated foreign object and the flat surface 43 a in the concave portion 43 of the first contact surface 41. In this state, it is sandwiched between the convex portions 44 of the second contact surface 42. Thereby, it becomes easy to form a clearance gap between the 1st contact surface 41 and the 2nd contact surface 42, and the foreign material detection apparatus 18 can detect an elongate foreign material more accurately.

  Further, according to the configuration of the present embodiment, the first electrode 53 can be provided on the first slope portion 43b, and the second electrode 54 can be provided on the second slope portion 44b. For this reason, the first electrode 53 and the second electrode 54 contact each other obliquely with respect to the closing direction of the card door 15, and the first electrode 53 and the second electrode 54 are easily rubbed. Thereby, even if an oxide film is formed on the surfaces of the first electrode 53 and the second electrode 54, the formed oxide film can be scraped off by the friction between the first electrode 53 and the second electrode 54. The foreign object detection device 18 can preferably maintain the detection accuracy.

  Further, according to the configuration of the present embodiment, the lower end portion of the upper second detector 32 and the upper end portion of the lower second detector 32 can be overlapped with each other. For this reason, even if an elongated foreign object is sandwiched between the first detector 31 and the overlapping portion 49 of the adjacent second detector 32, the foreign object is separated from the first detector 31 and the upper second side. It can be sandwiched between either the detector 32 or the lower second detector 32. Accordingly, since the foreign matter is not sandwiched between the upper second detector 32 and the lower second detector 32, the foreign matter detection device 18 detects the foreign matter as the first detector 31 and each second detector. It can be suitably sandwiched between the detectors 32.

  Further, according to the configuration of the present embodiment, it is possible to provide the interlocking mechanism 19 that causes the plurality of second detectors 32 to advance and retract in conjunction with the advance and retract operation of the safety shoe 17. For this reason, the door device 10 can detect an obstruction by the safety shoe 17 and can detect the elongated foreign matter by the foreign matter detection device 18 after closing the card door 15. As a result, the first detector 31 and the plurality of second detectors 32 do not detect foreign matter in a state where the card door 15 is open, so that the first electrode 53 and the second electrode 54 are not easily exposed to the outside. The first electrode 53 and the second electrode 54 can be used while being protected.

  Further, according to the configuration of the present embodiment, it is possible to detect whether the circuit unit 34 is in the energized state by the energization detection unit 35 before the card door 15 performs the opening operation. For this reason, if the foreign object detection device 18 is normal, the first detector 31 and all the second detectors 32 are in contact with each other, so that the energization detector 35 sends an abnormality detection signal to the door controller 20. Do not output. On the other hand, even if the first detector 31 and all the second detectors 32 are in contact with each other, the energization detection unit 35 outputs an abnormality detection signal toward the door control unit 20, and thus the abnormality of the foreign object detection device 18 is detected. Can be detected as For this reason, the door control part 20 can discover the abnormality of the foreign material detection apparatus 18 suitably.

  This embodiment is presented as an example and is not intended to limit the scope of the invention. The present embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. This embodiment and its modifications are included in the scope of the present invention and the gist thereof, and are also included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Elevator 5 Riding basket 6 Platform 7 Entrance / exit 10 Door device 15 Card door 16 Hold door 17 Safety shoe 18 Foreign object detection device 19 Interlock mechanism 20 Door control part 31 1st detection element 32 2nd detection element 33 Energizing member 34 Circuit part 35 Current supply Detection unit 36 Support body 41 First contact surface 42 Second contact surface 43 Concave portion of first contact surface 43b First slope portion 44 Convex portion of second contact surface 44b Second slope portion 46 of second detector Concave portion 47 Convex portion of second detector 49 Overlap portion 51 First electric wire 52 Second electric wire 53 First electrode 54 Second electrode

Claims (6)

A first detector provided on one side across a closing surface of a door that opens and closes an entrance / exit of an elevator car;
A plurality of second detectors arranged on the other side across the closing surface of the door so as to face the first detector, and arranged along the first detector;
A plurality of biasing members for biasing the plurality of second detectors toward the first detector;
A circuit part that can be energized when all the second detectors are in contact with the first detectors when the door is closed;
A foreign matter detection apparatus comprising: an energization detection unit capable of detecting whether or not the circuit unit is energized when the door is closed. The first detector has a first contact surface that contacts the second detector;
The second detector has a second contact surface that contacts the first contact surface;
The first contact surface and the second contact surface have a convex portion with one contact surface protruding in the door opening / closing direction, and the other contact surface is immersed in the door opening / closing direction. The foreign matter detecting device according to claim 1, further comprising a concave portion that allows the convex portion. The circuit unit includes a plurality of first electrodes provided on the first detector, a plurality of second electrodes provided on the plurality of second detectors so as to be in contact with the first electrodes, The plurality of second electrodes are all in contact with the plurality of first electrodes, and can be energized.
The first contact surface has a first inclined surface portion inclined with respect to a closing direction in which the door is closed,
The second contact surface has a second inclined surface portion that contacts the first inclined surface portion,
The foreign object detection device according to claim 2, wherein the plurality of first electrodes are provided on the first slope portion, and the plurality of second electrodes are provided on the second slope portion.   In the plurality of second detectors, one end portion of one adjacent second detector and the other end portion of the other adjacent second detector overlap each other. The foreign matter detection device according to claim 1, wherein the foreign matter detection device is characterized in that: The door capable of opening and closing the entrance of the elevator car;
A safety shoe capable of detecting the obstacle by moving backward and forward by contact with the obstacle, provided to be able to move forward and backward at the front end in the closing direction of the door;
The foreign object detection device according to any one of claims 1 to 4,
An interlocking mechanism for moving the plurality of second detectors of the foreign object detection device toward the first detector in conjunction with the backward movement of the safety shoe;
An elevator door device comprising: a door control unit capable of controlling an opening / closing operation of the door.   When the door control unit energizes the circuit unit before the door opening operation, and the energization detection unit of the foreign object detection device detects that the circuit unit is in a non-energized state, the foreign object detection device The elevator door device according to claim 5, wherein the elevator door device is determined to be a malfunction.

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