JP5098551B2 - Foreign matter detector for elevator doors - Google Patents

Description

  The present invention relates to a foreign object detection device for an elevator door, and more particularly, to a foreign object detection device for an elevator door that detects that a string-like foreign material such as a rope is caught in the door.

Generally, a door safety shoe provided with an operation piece and a switch for stopping the door closing operation and reversing the opening operation when a passenger or a carry-in object is caught in the elevator car door. However, this door safety shoe working piece can be detected if it has a certain degree of hardness and thickness, but it can detect string-like foreign matters such as thin ropes, power cords for electrical equipment, and pet leads. It was difficult.

For this reason, for example, a cleaning company may connect the power cord of the vacuum cleaner to an outlet in the basket and carry out the cleaning work on the basket floor, but with the vacuum cleaner in the hall with forgetting to unplug the power cord. If the door is closed when it gets off, the door safety shoe cannot detect the pinching of the power cord, and the power cord may be caught in the gap between the door and the door. At this time, if there is a call registration on another floor and the basket moves up and down, the person and the vacuum cleaner are left at the landing, while the basket is raised or lowered while the power cord is connected to the outlet. As a result, the vacuum cleaner, the outlet in the basket, the door, and the like may be damaged.

  In order to solve such a conventional problem, there has been proposed a foreign matter detection device for an elevator door, in which a cushioning rubber having a pressure sensor is provided on the door contact surface of the cage door, and the cage door is reversely controlled from a detection signal of the pressure sensor. (For example, refer to Patent Document 1). Also, an elevator provided with a door safety shoe that opens when the door is opened in the door opening direction after the cage door starts to close and when the elevator starts, and a foreign object detection member that contacts the door safety shoe at the closed end A foreign object detection device for a door has been proposed (see, for example, Patent Document 2).

JP-A-7-172745 (first page, FIG. 1) Japanese Unexamined Patent Publication No. 2004-323189 (first page, FIG. 1)

  However, in the foreign object detection device for an elevator door described in Patent Document 1, a slight gap is provided between the cushioning rubber and the cushioning rubber when the door is fully closed. Had a problem that it could not be detected. Further, since a predetermined gap is provided between the lower end portion of the door and the upper surface of the sill so that they do not slide on each other, there is a possibility that the string-like foreign matter in contact with the basket floor surface cannot be detected. Further, in the conventional foreign object detection device for an elevator door described in Patent Document 2, the door safety shoe is operated by pressing the operating piece so that it does not malfunction even if the car is vibrated or shaken due to passengers getting on and off. Since it is necessary to provide a play of about 2 to 5 mm until operation, there is a problem that when a foreign object smaller than this size is caught, it cannot be detected. Further, since the door safety shoe retreats obliquely upward when pressed due to its structure, there is a possibility that the string-like foreign matter in contact with the cage floor surface cannot be detected.

  The present invention has been made to solve the above-described problems, and operates effectively even when a thin string-shaped foreign object or a string-shaped foreign object in contact with the floor surface is sandwiched between the door and the door. It is to obtain a foreign object detection device for an elevator door that prevents the cage from continuing to move up and down with a string-shaped foreign object sandwiched therebetween.

The foreign object detection device for an elevator door according to the present invention is arranged to open and close the door of the elevator car and to extend vertically along the door contact surface of the door, and move up and down along the door contact surface. An actuating body, a detector that detects a relative position change caused by the vertical movement of the actuating body, and a control device that stops the raising and lowering of the cage by the output of the detector. vertically movably held by a guide provided in the vertical direction along the actuating piece is clamped with a slight gap in the guide, provided in the horizontal direction on the upper and lower portions of the anti doorstop face side of the actuating piece, A pair of upper and lower support pieces each elastically supported, a detection piece provided in the horizontal direction at the center of the working piece on the side opposite the door contact surface, and provided on the door contact surface side of the operation piece , urethane projecting from doorstop face by a predetermined distance By then composed of a clamping member consisting of emissions or rubber, elastically supported by the support tabs provided in the horizontal direction operating piece to hunt per side, and the detecting piece the vertical movement of the actuating piece It can be detected by a detector provided so as to face each other.

  According to the present invention, when it is detected that the operating body has moved up and down due to the string-like foreign matter sandwiched between the doors, the raising and lowering of the basket is stopped. Therefore, the basket is held with the string-like foreign matter sandwiched between the doors and the door. Even if the elevator moves up and down, it is possible to effectively prevent the trapped string-like foreign matter or the elevator device from being damaged.

The best mode for carrying out the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
1 is an overall configuration diagram of a foreign object detection device for an elevator door according to Embodiment 1 of the present invention. 2 is a cross-sectional view taken along the line II-II in FIG. FIG. 3 is a cross-sectional view of an essential part taken along line III-III in FIG. 4 is a cross-sectional view of a principal part taken along the line IV-IV in FIG. FIG. 5 is a diagram showing a state where string-like foreign matter is detected by the foreign matter detection device for an elevator door according to the present invention. 6 is a cross-sectional view taken along the line VI-VI in FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. FIG. 8 is a diagram showing a state where string-like foreign matter is detected by the foreign matter detection device for an elevator door according to Embodiment 1 of the present invention. FIG. 9 is an operation flowchart of the foreign object detection device for an elevator door according to the present invention.

  In FIG. 1, a car 1 that moves up and down in a hoistway (not shown) and transports passengers has a car doorway 2 for passengers to enter and exit. The cage doorway 2 is provided with a pair of cage doors 3a and 3b which are sliding doors. The cage doors 3 a and 3 b are supported by hanger rollers 5 guided by door rails 4 disposed at the upper ends of the cage entrances 2 and the lower ends of the cage doors 3 a and 3 b are disposed on the upper surface of the sill 6 disposed below the cage entrances 2. It is supported by a door shoe 8 guided by a sill groove 7 that is open to the bottom. Further, the cage doors 3 a and 3 b are opened and closed by a driving force of a drive device (not shown) provided in the door control device 9 disposed on the upper portion of the cage 1. The door control device 9 is provided in a hoistway or in a machine room (not shown), and is connected to an elevator control device 10 that controls the raising and lowering of the car 1. Done.

  As shown in FIG. 2 and FIG. 3, a door contact surface is provided on a side surface of the cage doors 3 a and 3 b that contact each other when the cage doors 3 a and 3 b are closed (hereinafter referred to as a door contact surface). , And a pair of front and rear guides 12 that are fixed so as to protrude from the door-to-door surface. The surface (the door contact surface of the operation body) with which each operation body 11 opposes protrudes from the door contact surface of the guide 12 by a predetermined dimension. Further, the upper end portion of the operating body 11 extends higher than the opening height of the car doorway 2, and the lower end portion thereof extends into the sill groove 7. An arc-shaped convex portion and an arc-shaped concave portion are formed on the opposing surfaces of the operating body 11 and the pair of front and rear guides 12, respectively. Move up and down along the surface. The working body 11 includes a working piece 11a that is a main body sandwiched between a pair of front and rear guides 12 with a slight gap, and a pair of upper and lower parts provided horizontally in the upper and lower portions of the working piece 11a on the side opposite to the door. The support piece 11b and a detection piece 11c provided in the horizontal direction at the center of the working piece 11a on the side opposite to the door contact surface, and urethane having a plurality of V-shaped grooves on the door contact surface of the operation piece 11a. A clamping member 11d made of rubber or rubber is fixed, and the clamping member 11d protrudes from the door contact surface of the guide 12 by a predetermined dimension.

  As shown in FIGS. 3 and 4, the pair of upper and lower support pieces 11b fixed to a predetermined position of the operating piece 11a and the center detection piece 11c are located at predetermined positions on the door contact surfaces of the cage door 3a and the cage door 3b. The three mounting holes 13 are respectively inserted through the mounting holes 13. Two elastic bodies 14, one of which is fixed to the car door 3 a or the car door 3 b, are provided on the upper and lower portions of each support piece 11 b. Further, near the tip of the central detection piece 11c, a cage door 3a and a photo switch 15 as a detector fixed to the basket door 3b are provided so as to face the detection piece 11c. The support pieces 11b are elastically sandwiched between the two elastic bodies 14, and the operating piece 11a is disposed relative to the detection piece 11c and the detection piece 11c by the elastic force of the elastic body 14. The photo switch 15 is held at a position where it overlaps. Further, a stopper 16 for restricting the operating range of the operating piece 11a is fixed to the car door 3a and the car door 3b by the support piece 11b coming into contact with a predetermined position close to each supporting piece 11b. The detection signal of the photo switch 15 is transmitted to the door control device 9, and the opening / closing operation of the car doors 3a and 3b or the operation control of the car 1 is performed.

  As shown in FIG. 5, the landing 17 where passengers get on and off has a landing doorway 18 for passengers to get on and off, and the landing doorway 18 is provided with landing doors 19a and 19b that are a pair of sliding doors. . The landing doors 19a and 19b are engaged with the cage doors 3a and 3b by an engagement device (not shown), and are opened and closed in conjunction with the cage doors 3a and 3b to open and close the landing doorway 18.

  Next, a process until the foreign matter detection device for an elevator door according to the first embodiment of the present invention detects that a string-like foreign matter is caught in the door will be described with reference to FIGS.

  5 (a) and FIG. 6 (a), when the user 20 who forgot to unplug the power cord 21a connected to the outlet 1a in the basket 1 gets down to the landing 17 with the vacuum cleaner 21, The cage doors 3a, 3b and the landing doors 19a, 19b are fully closed, and the power cord 21a is sandwiched between the gaps between the cage doors 3a, 3b and the landing doors 19a, 19b. The cage doors 3a and 3b are closed with a constant torque in the door closing direction by the driving device so that the cage doors 3a and 3b are not easily opened due to traveling vibration of the cage 1 or mischief or the like. Therefore, the power cord 21a is sandwiched with sufficient force by the sandwiching member 11d such as urethane or rubber fixed to the operating piece 11a.

  At this time, the door control device 9 that has detected that the car doors 3a and 3b are fully closed by a fully-closed detection switch (not shown) provided in the car 1 sends a fully-closed detection signal to the elevator control device 10. Send to. The elevator control device 10 that has received the fully closed detection signal determines whether there is a call registration on a floor different from the floor where the hall 17 is located. In this determination, if there is a call registration on the lower floor from the floor, the elevator control device 10 drives a hoist (not shown) and causes the car 1 to travel toward the lower floor where the call is registered. At this time, as shown in FIG. 6 (b), when the car 1 moves downward and the power cord 21a between the vacuum cleaner 21 and the car doors 3a and 3b is in a tight state, A tension acts on the cord 21a in an obliquely upward direction as indicated by an arrow A. Due to this tension, the operating piece 11a is moved upward from the normal position shown in FIG. 8A as shown in FIG. 8B, and at least one of the detecting pieces 11c becomes non-polymerized with the photoswitch 15. When moving to the position, the photo switch 15 transmits an abnormal signal to the elevator control device 10 via the door control device 9.

  Next, in the determination of whether or not there is a call registration on a floor different from the floor where the hall 17 is located, if there is a call registration on the floor above the floor, the elevator control device 10 moves the hoisting machine. The car is driven and travels toward the upper floor where the call is registered. At this time, as shown in FIG. 6C, when the car 1 moves upward and the power cord 21a between the vacuum cleaner 21 and the car doors 3a and 3b is in a tight state, Tension acts on the cord 21a in an obliquely downward direction as indicated by an arrow B. Due to this tension, the operating piece 11a moves downward from the normal position shown in FIG. 8A as shown in FIG. 8C, and at least one of the detection pieces 11c becomes non-polymerized with the photoswitch 15. When moving to the position, the photo switch 15 transmits an abnormal signal to the elevator control device 10 via the door control device 9.

  Next, in the determination of whether or not there is a call registration on a floor different from the floor where the hall 17 is located, if there is no call registration, the car 1 closes each door and moves to the floor where the hall 17 is located. At this time, although not shown in detail, if the user 20 pulls the power cord 21a obliquely upward, tension is applied to the power cord 21a between the user 20 and the cage doors 3a, 3b. work. Due to this tension, the operating piece 11a is moved upward from the normal position shown in FIG. 8A as shown in FIG. 8B, and at least one of the detecting pieces 11c becomes non-polymerized with the photoswitch 15. When moving to the position, the photo switch 15 transmits an abnormal signal to the elevator control device 10 via the door control device 9.

  Next, in FIG. 5B and FIG. 7, when the user 20 who forgot to unplug the power cord 21 a connected to the outlet 1 a in the basket 1 gets down to the landing 17 with the vacuum cleaner 21, the cage door 3a and 3b and the landing doors 19a and 19b start the door closing operation, and the power cord 21a is in sliding contact with the operating body 11 of the cage door 3a.

  When the closing operation of the car doors 3a and 3b further proceeds from this state, the operating piece 11a is supplied with power according to the gripping force with which the user 20 grips the electric vacuum cleaner 21 and the connection force between the outlet 1a and the power cord 21a. The tension of the cord 21a works. Assuming that the gripping force of the user 20 is large at this time, a tension acts on the power cord 21a between the electric vacuum cleaner 21 and the operating piece 11a in an obliquely upward direction as indicated by an arrow E. Due to this tension, the operating piece 11a moves from the normal position shown in FIG. 8A to the upward direction as shown in FIG. 8B, and the detecting piece 11c moves to a position where it does not overlap with the photoswitch 15. Then, the photo switch 15 transmits an abnormal signal to the elevator control device 10 via the door control device 9.

  Next, assuming that the connecting force between the outlet 1a and the power cord 21a is large, a tension acts diagonally downward on the power cord 21a between the operating piece 11a and the outlet 1a as indicated by an arrow F. Due to this tension, the operating piece 11a moves from the normal position shown in FIG. 8 (a) downward as shown in FIG. 8 (c), and the detecting piece 11c moves to a position where it does not overlap with the photoswitch 15. Then, the photo switch 15 transmits an abnormal signal to the elevator control device 10 via the door control device 9.

  Next, although not shown in detail, when each door is in a door-opening operation or when a fully-open state is detected by a fully-open detection switch (not shown) provided in the car 1, for example, by contact of the user 20 or the like Even when the operating piece 11a moves upward or downward and the detection piece 11c becomes non-polymerized with the photo switch 15, the photo switch 15 also sends an abnormal signal to the elevator control device 10 via the door control device 9. Send.

  Next, the elevator door foreign matter detection apparatus according to Embodiment 1 of the present invention will be described with reference to FIG. 9 regarding the raising / lowering operation of the cage 1 and the opening / closing operation of each door when foreign matter is detected. For convenience of description, in FIG. 9, steps 101 to 112 in the text are denoted as S101 to S112.

  In step 101, the elevator control device 10 determines whether an abnormal signal of the photo switch 15 is received from the door control device 9. If it is determined that an abnormal signal is not received in this determination, the process returns to step 101 and this determination is repeated. If it is determined that an abnormal signal is received, the process proceeds to step 102.

  In step 102, the elevator control device 10 determines whether or not a fully closed detection signal of a fully closed detection switch is received from the door control device 9. In this determination, if it is determined that the fully closed detection signal is received, the process proceeds to step 103. If it is determined in step 102 that the fully closed detection signal has not been received, the process proceeds to step 111 described later.

  In step 103, the elevator control device 10 that controls the raising and lowering of the car 1 determines whether or not the car 1 is moving up and down (running). In this determination, if it is determined that the car 1 is moving up and down, the process proceeds to step 104, and an electric motor (not shown) provided in the hoisting machine to prevent the car 1 from continuing to move up and down with a foreign object sandwiched between the doors. The power supply to is cut off, the car 1 is stopped in an emergency, and the routine proceeds to step 105. If it is determined in step 103 that the car 1 is not being lifted (running), the process proceeds to step 109 described later.

  In step 105, the elevator control device 10 that constantly receives the position information of the car 1 from an encoder (not shown) that detects the rotation of the electric motor provided in the hoisting machine, the stop position of the car 1 is the car door 3a, It is determined whether or not it is a position (hereinafter referred to as a door zone) where the engaging device of 3b and the landing doors 19a and 19b are engaged. In this determination, if it is determined that the stop position of the basket 1 is not within the door zone, the routine proceeds to step 106. If it is determined in step 105 that the stop position of the basket 1 is within the door zone, the process proceeds to step 109 described later.

  In step 106, the elevator control device 10 raises and lowers the cage 1 in the direction opposite to the direction in which the cage 1 was raised, that is, toward the start floor until the cage 1 arrives in the door zone at a slow speed, the so-called very low speed (step). 107) After that, the travel is stopped (step 108), and the process proceeds to step 109.

  Next, at step 109, the elevator control device 10 transmits a door open signal to the door control device 9. The door control device 9 that has received the door open signal opens the car doors 3a and 3b and stops the car doors 3a and 3b at positions where full open detection is detected by the full open detection switch provided in the car 1, and proceeds to step 110 for a predetermined time. The fully open state of the doors 3a and 3b is maintained.

  If it is determined in step 102 that a fully closed detection signal has not been received and the process proceeds to step 111, the elevator control device 10 determines whether a fully open detection signal has been received. If it is determined that the fully open detection signal is received in this determination, the process proceeds to step 110, and the fully opened state of the cage doors 3a and 3b is maintained for a predetermined time.

  On the other hand, if it is determined in step 111 that the fully open detection signal has not been received, that is, if the door is open or closed, the process proceeds to step 112, and the elevator controller 10 temporarily stops the door opening / closing operation. After that, the cage doors 3a and 3b are opened and stopped at a position where the fully open detection switch provided on the cage 1 detects the full open (step 109), and the cage doors 3a and 3b are kept fully open for a predetermined time (step 109). 110).

  As described above, according to the first embodiment of the present invention, the operating body that moves up and down by the tension of the string-like foreign matter sandwiched between the cage doors is disposed on the door contact surface of the cage door, and the vertical movement of the operating body is performed. Since the photo switch for detection is provided, even if it is a thin string-like foreign material, it can be effectively detected that it is caught in the gap between the cage doors or is in sliding contact with the cage doors. As a result, if the car is moving up and down, it will stop emergency and prevent the car from continuing to move up and down, and if the emergency stop position is outside the door zone, it will run slowly into the door zone on the start floor and open the door, If the door is in the open / close operation, the door open / close operation is temporarily stopped and then the door open operation is performed, so it is possible to more effectively prevent the foreign matter caught in the door from being damaged or the elevator-related equipment from being damaged. be able to.

  In addition, since the lower end portion of the operating piece extends to the inside of the sill groove, it can be detected more reliably regardless of the height of the string-like foreign material at the entrance of the cage.

Embodiment 2. FIG.
FIG. 10 is an overall configuration diagram of a foreign matter detection apparatus for an elevator door according to Embodiment 2 of the present invention. 11 is a cross-sectional view taken along line XI-XI in FIG. 12 is a cross-sectional view taken along line XII-XII in FIG. FIG. 13 is a cross-sectional view of a principal part taken along line XIII-XIII in FIG. FIG. 14 is a diagram showing a state where string-like foreign matter is detected by the foreign matter detection device for an elevator door according to Embodiment 2 of the present invention. FIG. 15 is a diagram showing a state where string-like foreign matter is detected by the foreign matter detection device for an elevator door according to Embodiment 2 of the present invention. In the figure, the same reference numerals as those in FIG. 1 to FIG.

  As shown in FIGS. 10 to 13, frame doors 22 having a U-shaped cross section extending in the vertical direction along the door contact surfaces are provided on the door contact surfaces of the car door 3a and the car door 3b. It arrange | positions so that it may oppose. A rotating body 23 is arranged in a recess provided in an opening on each surface of each frame body 22. A part of the rotating body 23 protrudes from the recess. The rotating body 23 includes a rotating piece 23a having a circular cross section as a main body, a pair of upper and lower support pieces 23b provided in the horizontal direction on the upper and lower sides of the rotating piece 23a on the opposite door side, and a rotating piece 23a. It is comprised from the detection piece 23c provided in the horizontal part in the center part by the side of the counterdoor of the piece 23a. The rotating piece 23a is coated by a clamping member 23d made of urethane, rubber or the like. The upper and lower ends of the rotating pieces 23a are respectively supported by bearings 24 provided at the upper and lower ends of the frame body 22 and rotate about the vertical axis. Further, the upper end portion of the rotating piece 23 a extends higher than the opening height of the car doorway 2, and the lower end portion extends into the sill groove 7.

  A pair of upper and lower support pieces 23b fixed to a predetermined position of the rotating piece 23a and a center detection piece 23c are a door contact surface of the cage door 3a and a predetermined position of the frame body 22, and a door contact surface and a frame of the cage door 3b. The three attachment holes 13 and 25 provided at predetermined positions of the body 22 are respectively inserted. Two elastic bodies 26, one of which is fixed to the car door 3a or the car door 3b, are provided on both sides of each support piece 23b. A pair of detection switches (detectors) 27 are provided on both sides of the central detection piece 23c with a predetermined gap between the detection pieces 23c. The support pieces 23b are elastically sandwiched between the two elastic bodies 26, and the rotating piece 23a is disposed with a predetermined gap across the detection piece 23c by the elastic force of the elastic body 26. The detection piece 23c is held at the center position of the pair of detection switches 27. Further, the side edge portion of the mounting hole 13 restricts the rotation of the rotation piece 23a by the contact of the pair of upper and lower support pieces 23b that rotate with the rotation of the rotation piece 23a and the center detection piece 23c. It has a function as a stopper. The detection signal of the detection switch 27 is transmitted to the door control device 9, and the opening / closing operation of the car doors 3a and 3b or the operation control of the car 1 is performed.

  Next, the process until the foreign object detection device for an elevator door according to the second embodiment of the present invention detects that a string-like foreign object is caught in the door is described with reference to FIGS. I will explain.

  5 (a) and FIG. 6 (a), when the user 20 who forgot to unplug the power cord 21a connected to the outlet 1a in the basket 1 gets down to the landing 17 with the vacuum cleaner 21, The cage doors 3a, 3b and the landing doors 19a, 19b are fully closed, and the power cord 21a is sandwiched between the gaps between the cage doors 3a, 3b and the landing doors 19a, 19b. The cage doors 3a and 3b are closed with a constant torque in the door closing direction by the driving device so that the cage doors 3a and 3b are not easily opened due to traveling vibration of the cage 1 or mischief or the like. Accordingly, the power cord 21a is held with sufficient force by the rotating piece 23a whose surface is coated with urethane, rubber or the like.

  At this time, the door control device 9 that has detected that the car doors 3a and 3b are fully closed by a fully-closed detection switch (not shown) provided in the car 1 sends a fully-closed detection signal to the elevator control device 10. Send to. The elevator control device 10 that has received the fully closed detection signal determines whether there is a call registration on a floor different from the floor where the hall 17 is located. In this determination, if there is a call registration on the lower floor from the floor, the elevator control device 10 drives a hoist (not shown) and causes the car 1 to travel toward the lower floor where the call is registered. At this time, as shown in FIG. 6 (b), when the car 1 moves downward and the power cord 21a between the vacuum cleaner 21 and the car doors 3a and 3b is in a tight state, A tension acts on the cord 21a in an obliquely upward direction as indicated by an arrow A. Due to this tension, each rotating piece 23a rotates from the normal position shown in FIG. 14A in the directions of arrows C and D as shown in FIG. 14B, and the detecting piece 23c presses the detection switch 27. Then, the detection switch 27 transmits an abnormal signal to the elevator control device 10 via the door control device 9.

  Next, in the determination of whether or not there is a call registration on a floor different from the floor where the hall 17 is located, if there is a call registration on the floor above the floor, the elevator control device 10 moves the hoisting machine. The car is driven and travels toward the upper floor where the call is registered. At this time, as shown in FIG. 6C, when the car 1 moves upward and the power cord 21a between the vacuum cleaner 21 and the car doors 3a and 3b is in a tight state, Tension acts on the cord 21a in an obliquely downward direction as indicated by an arrow B. Due to this tension, each rotating piece 23a is rotated from the normal position shown in FIG. 14A in the directions of arrows C and D as shown in FIG. 14B, and at least one detection piece 23c is detected by the detection switch. When 27 is pressed, the detection switch 27 transmits an abnormal signal to the elevator control device 10 via the door control device 9.

  Next, in the determination of whether or not there is a call registration on a floor different from the floor where the hall 17 is located, if there is no call registration, the car 1 closes each door and moves to the floor where the hall 17 is located. Stopped. At this time, although not shown in detail, if the user 20 pulls the power cord 21a obliquely upward, tension is applied to the power cord 21a between the user 20 and the car doors 3a, 3b. Due to this tension, each rotating piece 23a is rotated from the normal position shown in FIG. 14A in the directions of arrows B and C as shown in FIG. 14B, and at least one detection piece 23c is detected by the detection switch. When 27 is pressed, the detection switch 27 transmits an abnormal signal to the elevator control device 10 via the door control device 9.

  Next, in FIG. 5B and FIG. 7, when the user 20 who forgot to unplug the power cord 21 a connected to the outlet 1 a in the basket 1 gets down to the landing 17 with the vacuum cleaner 21, the cage door 3a, 3b and landing doors 19a, 19b start the door closing operation, and the power cord 21a is in sliding contact with the rotating piece 23a of the cage door 3a.

  When the closing operation of the car doors 3a and 3b further proceeds from this state, the rotating piece 23a is provided with a gripping force for the user 20 to grip the electric vacuum cleaner 21 and a connection force between the outlet 1a and the power cord 21a. The tension of the power cord 21a works. Assuming that the gripping force of the user 20 is large at this time, a tension acts on the power cord 21a between the electric vacuum cleaner 21 and the rotating piece 23a in an obliquely upward direction as indicated by an arrow E. When the rotating piece 23a is rotated in the direction of arrow G as shown in FIG. 15B from the normal position shown in FIG. 15A by this tension, and the detection piece 23c presses the detection switch 27, it is detected. The switch 27 transmits an abnormal signal to the elevator control device 10 via the door control device 9.

  Next, assuming that the connecting force between the outlet 1a and the power cord 21a is large, a tension acts diagonally downward on the power cord 21a between the rotating piece 23a and the outlet 1a as indicated by an arrow F. Due to this tension, the rotating piece 23a is rotated from the normal position shown in FIG. 15A in the direction of arrow H as shown in FIG. 15C, and the detecting piece 23c fixed to the rotating piece 23a. When the detection switch 27 is pressed, the detection switch 27 transmits an abnormal signal to the elevator control device 10 via the door control device 9.

  Next, although not shown in detail, when each door is in a door-opening operation or when a fully-open state is detected by a fully-open detection switch (not shown) provided in the car 1, for example, by contact of the user 20 or the like Even when the rotation piece 23 a rotates and the detection piece 23 c presses the detection switch 27, the detection switch 27 transmits an abnormal signal to the elevator control device 10 via the door control device 9.

  Since the elevator door foreign object detection device according to the second embodiment of the present invention detects the foreign object, the raising / lowering operation of the cage 1 and the opening / closing operation of each door are the same as the operations described in the first embodiment. Description is omitted.

  As described above, according to the second embodiment of the present invention, the rotating body that is rotated by the tension of the string-like foreign matter sandwiched between the cage doors is disposed on the door-contact surface of the cage door, and the rotation of the rotating body is performed. Since the detection switch for detection is provided, even if it is a thin string-like foreign object, it can be effectively detected that it is caught in the gap between the cage doors or is in sliding contact with the cage doors. As a result, if the car is moving up and down, it will stop emergency and prevent the car from continuing to move up and down, and if the emergency stop position is outside the door zone, it will run slowly into the door zone on the start floor and open the door, If the door is in the open / close operation, the door open / close operation is temporarily stopped and then the door open operation is performed, so it is possible to more effectively prevent the foreign matter caught in the door from being damaged or the elevator-related equipment from being damaged. be able to.

  In addition, since the lower end portion of the rotating piece is disposed so as to extend into the sill groove, it is possible to more reliably detect the string-like foreign matter regardless of the height of the entrance of the cage.

  In Embodiment 1 or Embodiment 2 of the present invention, when the car is driven at a slow speed to the start floor, or when the door is opened, “the car moves. Please be careful.” If the voice notification such as “Open, please wait away from the door” is given, the user can sense the operation of the elevator in advance and can feel secure.

  In the first or second embodiment of the present invention, the description of the door safety shoe is omitted for convenience of explanation, but it goes without saying that the door safety shoe is provided on the cage door.

1 is an overall configuration diagram of a foreign object detection device for an elevator door according to Embodiment 1 of the present invention. It is arrow sectional drawing in the II-II line | wire of FIG. It is principal part sectional drawing in the III-III line of FIG. It is principal part sectional drawing in the IV-IV line of FIG. It is a figure which shows a mode that a string-like foreign material is detected with the foreign material detection apparatus of the elevator door of this invention. It is arrow sectional drawing in the VI-VI line of FIG. It is arrow sectional drawing in the VII-VII line of FIG. It is a figure which shows a mode that a string-like foreign material is detected with the foreign material detection apparatus of the elevator door which concerns on Embodiment 1 of this invention. It is an operation | movement flowchart of the foreign material detection apparatus of the elevator door of this invention. It is a whole block diagram of the foreign object detection apparatus of the elevator door which concerns on Embodiment 2 of this invention. It is arrow directional cross-sectional view in the XI-XI line of FIG. It is arrow sectional drawing in the XII-XII line | wire of FIG. It is principal part sectional drawing in the XIII-XIII line | wire of FIG. It is a figure which shows a mode that a string-like foreign material is detected with the foreign material detection apparatus of the elevator door which concerns on Embodiment 2 of this invention. It is a figure which shows a mode that a string-like foreign material is detected with the foreign material detection apparatus of the elevator door which concerns on Embodiment 2 of this invention.

Explanation of symbols

  1 cage, 1a outlet in the cage, 2 cage doorway, 3a cage door, 3b cage door, 6 sill, 7 sill groove, 9 door control device, 10 elevator control device, 11 actuating body, 11a actuating piece, 11b supporting piece, 11c Detection piece, 11d Holding member, 12 Guide, 13 Mounting hole, 14 Elastic body, 15 Photo switch (detector), 16 Stopper, 17 Platform, 18 Platform entrance / exit, 19a, 19b Platform door, 20 User, 21 Vacuum cleaner , 21a Power cord, 22 Frame body, 23 Rotating body, 23a Rotating piece, 23b Supporting piece, 23c Detection piece, 23d Holding member, 24 Bearing, 25 Mounting hole, 26 Elastic body, 27 Detection switch (detector).

Claims (4)

A door that opens and closes the door of the elevator cage;
An actuator that is arranged to extend in the vertical direction along the door contact surface of the door, and moves up and down along the door contact surface;
A detector for detecting a relative position change caused by the vertical movement of the operating body;
A controller that stops the raising and lowering of the basket by the output of the detector,
The actuating body is held by a guide provided in the vertical direction along the door contact surface of the door so as to be movable up and down, and is held between the guide with a slight gap, and the counter door contact surface of the operation piece A pair of upper and lower support pieces horizontally provided on the upper and lower sides of the side , each of which is elastically supported, a detection piece provided in the horizontal direction at a central portion of the working piece on the side facing the door, and It consists of a clamping member made of urethane or rubber, etc. , which is provided on the door contact surface side of the operating piece and protrudes from the door contact surface of the guide by a predetermined dimension. An elevator door characterized in that the vertical movement of the operating piece can be detected by the detector provided so as to face the detecting piece by elastically supporting the support piece. Foreign object detection device.   2. The control device according to claim 1, wherein, after stopping the raising / lowering of the cage by the output of the detector, the control device causes the cage to travel at a low speed according to a stop position of the cage, to the floor where the cage has started raising / lowering. Foreign matter detection device for elevator doors. The control unit, the foreign material detecting device of elevator doors according to claim 1, wherein the controlling the opening and closing operation of the door by the output of the detector.   2. The elevator door foreign object detection device according to claim 1, wherein an upper end portion of the operating body extends at least to a height of the entrance and a lower end thereof extends at least to the upper surface of the sill.

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