JPWO2007039931A1 - Elevator door equipment - Google Patents

Abstract

The car doorway is opened and closed by a car door. An operating piece that is displaceable between a protruding position that protrudes from the lower end of the car door and a retracted position that is located above the protruding position is provided at the door closing side end of the car door. The operating piece is displaced to the protruding position when the car door fully closes the car doorway, and is displaced to the retracted position when the car door is moved in the door opening direction. A car sill with a sill hole is provided at the bottom of the car doorway. The operating piece is inserted into the threshold hole when the operating piece is displaced to the protruding position in accordance with the movement of the car door. Further, the insertion of the operating piece into the sill hole is removed when the operating piece is displaced to the retracted position. The presence or absence of displacement of the operating piece to the protruding position is detected by a detection switch. The door control device controls the movement of the car door based on information from the detection switch.

Description

  The present invention relates to an elevator door device that opens and closes an entrance that communicates the inside of a car with a landing.

  In a conventional elevator door device, in order to detect that a foreign object is sandwiched between a pair of doors, an operating piece that is displaceable with respect to the door is provided at the door closing side end of the door. The operating piece moves together with the door while protruding from the door closing side end of the door. Below the door, a sill extending in the moving direction of the door is provided. The sill is provided with a guide groove into which the lower end portion of the operating piece is inserted. When the operating piece comes into contact with a foreign object and is displaced with respect to the door, the moving direction of the door is reversed from the door closing direction to the door opening direction (see Patent Document 1).

JP-A-5-301692

  However, in such a conventional elevator door device, when the door is moved, the operating piece is protruded from the door, so that, for example, a cart easily hits the operating piece, and the operating piece is damaged. Cheap. For this reason, in order to prevent breakage of the working piece, the rigidity and weight of the working piece are increased. Therefore, if the foreign object is easy to bend and light, such as a string, even if the foreign object contacts the operating piece, the operating piece is difficult to be displaced relative to the door, and the foreign object cannot be detected. There is a risk that.

  In addition, since the door moves with the operating piece inserted into the guide groove, the sill must be provided with a guide groove over the entire range in which the door moves, improving design. It becomes an obstacle.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain an elevator door device that can detect foreign matters more reliably and improve design. To do.

  The elevator door device according to the present invention includes a car door that opens and closes a car doorway, a projecting position that projects from the lower end of the car door, and a retreat that is located above the projecting position. An operating piece that is displaceable between the position and the car door is displaced to the projecting position by fully closing the car doorway, and moved to the retracted position by moving the car door in the door opening direction, The operating piece displaced to the projecting position with the movement of the car door is inserted, and a threshold hole is provided in the lower part of the car doorway to disengage the operating piece when the operating piece is displaced to the retracted position. A car sill, a detection switch that detects the presence or absence of displacement of the operating piece to the protruding position, and a door control device that controls the movement of the car door based on information from the detection switch are provided.

It is a partial front view which shows the door apparatus of the elevator by Embodiment 1 of this invention. It is sectional drawing along the II-II line of FIG. It is a partial front view which shows the door apparatus of an elevator when the car doorway of FIG. 1 is fully closed. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3. It is an expanded sectional view along the VV line of FIG. It is a front view which shows the state which has crossed the string on the boarding sill and the car sill of FIG. 3 as a foreign material. It is sectional drawing along the VII-VII line of FIG. It is an expanded sectional view along the VIII-VIII line of FIG. It is a partial cross section figure which shows the door apparatus of the elevator by Embodiment 2 of this invention. FIG. 10 is an enlarged sectional view taken along line XX in FIG. 9.

Preferred embodiments of the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
1 is a partial front view showing an elevator door device according to Embodiment 1 of the present invention, and FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 3 is a partial front view showing the door device of the elevator when the car doorway 1 of FIG. 1 is fully closed, and FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. In addition, FIG. 1 is a figure which shows when the car doorway 1 is a half-open state. In the figure, the car is provided with a car doorway 1. A car-side hanger case 2 fixed to the car is provided above the car doorway 1. The car-side hanger case 2 is provided with a car-side door rail 3 that extends in the direction of the frontage of the car doorway 1. A pair of car doors 4 that open and close the car doorway 1 are suspended from the car-side door rail 3.

  A plurality of (in this example, two) hanger rollers 5 mounted on the car-side door rail 3 are provided at the top of each car door 4. Each car door 4 is moved along the car-side door rail 3 by a driving force of a door driving device (not shown) mounted on the car. Each hanger roller 5 is rolled on the car-side door rail 3 as the car door 4 moves.

  A landing entrance 6 (FIGS. 2 and 4) is provided at the landing on each floor. The car entrance 1 faces the landing entrance 6 when the car is stopped on each floor. A landing-side hanger case (not shown) fixed to the wall on the landing side is provided at the upper part of the landing entrance 6. The landing-side hanger case is provided with a landing-side door rail (not shown) that extends toward the frontage of the landing entrance 6. A pair of landing doors 7 (FIGS. 2 and 4) that open and close the landing doorway 6 are suspended from the landing-side door rail.

  Each landing door 7 is movable along the landing-side door rail. Each landing door 7 is moved together with each car door 4 while being engaged with the car door 4 by an engaging device (not shown) when the car is stopped on each floor. The landing entrance 6 is opened and closed by the movement of each landing door 7.

  A door contact surface 4 a that is brought into contact with each other when the car doors 4 fully close the car doorway 1 is provided at the door closing side end of each car door 4. A door contact surface 7 a that abuts each other when the landing doors 7 fully close the landing doorway 6 is provided at the door closing side end of each landing door 7. The positions at which the door contact surfaces 4a are in contact with each other and the positions at which the door contact surfaces 7a are in contact with each other are located on the door contact reference plane P perpendicular to the entrance direction of the car doorway 1 and the landing doorway 6. ing. The door contact reference plane P is located at the center of the car entrance 1 and the landing entrance 6.

  A safety shoe 8 (FIGS. 2 and 4) and a detection plate (operating piece) 9 that can be displaced with respect to the car door 4 are provided at the door closing side end of each car door 4. The safety shoe 8 and the detection plate 9 are disposed between the car door 4 and the landing door 7. The detection plate 9 is disposed between the safety shoe 8 and the car door 4. The weight of the detection plate 9 is lighter than the weight of the safety shoe 8.

  The safety shoe 8 and the detection plate 9 are displaced according to the movement of the car door 4. That is, a displacement device (not shown) is provided between the car door 4 and the landing door 7 to displace the safety shoe 8 and the detection plate 9 independently according to the movement of the car door 4. . As the displacement device, for example, the safety shoe 8 and the detection plate 9 are displaced according to the position of the car door 4 with respect to the car, or the safety shoe 8 and the detection plate 9 are displaced according to the position of the car door 4 with respect to the landing door 7. And the like.

  The safety shoe 8 is moved together with the car door 4 in a state where the safety shoe 8 protrudes from the door closing side end of the car door 4 to the door closing side. Are to be accommodated between. When each car door 4 is moved in the door closing direction, for example, when the safety shoe 8 is displaced relative to the car door 4 due to contact of an obstacle with the safety shoe 8, the moving direction of each car door 4 is moved. Is reversed from the door closing direction to the door opening direction under the control of a door control device (not shown).

  The detection plate 9 can be displaced between a protruding position that protrudes downward from the lower end of the car door 4 and a retracted position that is positioned above the protruding position. When the detection plate 9 is in the protruding position, the detection plate 9 is also protruded from the door closing side end of the car door 4 in the door closing direction. Further, the detection plate 9 is accommodated between the car door 4 and the landing door 7 when in the retracted position.

  The detection plate 9 is displaced toward the protruding position by the movement of the car door 4 in the door closing direction, and is displaced toward the retracted position by the movement of the car door 4 in the door opening direction. The detection plate 9 reaches the protruding position when the car door 4 fully closes the car doorway 1. In this example, the displacement of the detection plate 9 from the retracted position to the protruding position is started when the car door 4 reaches a predetermined position immediately before the car doorway 1 is fully closed, and the car door 4 passes the car doorway 1. Completed when fully closed. The displacement of the detection plate 9 from the protruding position to the retracted position is started when the movement of the car door 4 in the door opening direction is started, and is completed when the car door 4 reaches the predetermined position. It has become.

  An upper mounting portion 10 is provided on the upper portion of the detection plate 9, and a lower mounting portion 11 is provided on the lower portion of the detection plate 9. Each of the upper attachment portion 10 and the lower attachment portion 11 protrudes from the detection plate 9 to the door opening side.

  The car door 4 is provided with an upper rotating shaft 12 and a lower rotating shaft 13 that are arranged at a distance from each other in the height direction of the car door 4. The detection plate 9 is attached to the car door 4 via an upper rotation link 14 that can rotate about the upper rotation shaft 12 and a lower rotation link 15 that can rotate about the lower rotation shaft 13. It is supported. An upper mounting portion 10 is rotatably attached to a tip portion of the upper rotation link 14 by a pin 16, and a lower attachment portion 11 is rotatably attached to a distal end portion of the lower rotation link 15 by a pin 17. It has been. The detection plate 9 is displaced between the protruding position and the retracted position by the rotation of the upper rotating link 14 and the lower rotating link 15. Further, the car door 4 is provided with a stopper 18 for holding the detection plate 9 in the protruding position by contacting the upper rotation link 14.

  The car door 4 is provided with a micro switch (detection switch) 19 for detecting whether or not the detection plate 9 is displaced to the protruding position. In this example, the micro switch 19 detects the presence or absence of displacement of the detection plate 9 to the protruding position based on the presence or absence of contact with the lower rotation link 15. The car doorway 1 is provided with a fully closed detection sensor (not shown) for detecting whether or not the car doorway 1 is fully closed by the car door 4.

  Information from the fully-closed detection sensor and the microswitch 19 is sent to the door control device. The door control device controls the movement of the car door 4 on the basis of information from the fully closed detection sensor and the micro switch 19. That is, the door control device moves the car door 4 from the door closing direction to the door opening direction when the car door 4 fully closes the car doorway 1 and the position of the detection plate 9 is out of the protruding position. Inverted. Further, the door control device enables the car to move when the car door 4 fully closes the car doorway 1 and the position of the detection plate 9 is the protruding position.

  A plurality of door legs 20 are provided at the lower end of the car door 4. A protective piece (sweeper) 21 is provided at the lower end of the door closing side end of the car door 4. The door legs 20 and the protection pieces 21 protrude downward from the lower end of the car door 4. Moreover, the length which protrudes below the protection piece 21 is made shorter than the length which protrudes below each door leg 20. As shown in FIG.

  A car sill 22 fixed to the car is provided below the car doorway 1. The car sill 22 is provided with a car sill groove 23 extending in the direction of the front door of the car doorway 1 and a sill hole (detection hole) 24 arranged at a position intersecting the door-stop reference plane P.

  Each door pedestal 20 and protective piece 21 are inserted into a car sill groove 23. The door legs 20 and the protection pieces 21 are moved along the car sill groove 23 together with the car door 4 while being inserted into the car sill groove 23.

  The sill hole 24 is a long hole arranged so as to be parallel to the opening direction of the car entrance 1 and the landing entrance 6. The threshold hole 24 is a through hole that penetrates the cage threshold 22 in the vertical direction.

  A landing threshold 25 (FIGS. 2 and 4) fixed to the landing is provided below the landing entrance 6. The landing threshold 25 is provided with a landing threshold groove 26 extending toward the frontage of the landing entrance 6. A plurality of door legs (not shown) provided at the lower ends of the landing doors 7 are inserted into the landing threshold grooves 26. Each door peddle is moved along the landing threshold groove 26 together with the landing door 7 in a state of being inserted into the landing threshold groove 26.

  FIG. 5 is an enlarged cross-sectional view taken along the line VV in FIG. As shown in FIG. 5, when the car door 4 fully closes the car doorway 1 and the detection plate 9 is displaced to the protruding position, the lower portion of the detection plate 9 is in the threshold hole 24. Has been inserted. Further, the lower portion of the detection plate 9 is removed from the threshold hole 24 when the detection plate 9 is displaced toward the retracted position.

  FIG. 6 is a front view showing a state in which a string crosses as a foreign object on the landing threshold 25 and the car threshold 22 of FIG. 3. FIG. 7 is a sectional view taken along line VII-VII in FIG. Further, FIG. 8 is an enlarged sectional view taken along line VIII-VIII in FIG. In the figure, when a string (foreign matter) 27 is passing over the car sill 22, the string 27 is pushed by the protective piece 21 and carried onto the sill hole 24 by the movement of the car door 4 in the door closing direction. It has become.

  When the string 27 is on the threshold hole 24, the detection plate 9 is hooked on the string 27 and the displacement of the detection plate 9 to the protruding position is prevented. In this example, the length D (FIG. 8) in the width direction of the sill hole 24 is adjusted so that when the detection plate 9 is hooked on the string 27, tension to support the detection plate 9 is applied to the string 27. Yes.

  Next, the operation will be described. When the car doorway 1 and the landing doorway 6 are fully closed, the lower part of the detection plate 9 is inserted into the threshold hole 24. At this time, it is detected by the door control device that the lower rotation link 15 contacts the micro switch 19 and the detection plate 9 is in the protruding position.

  When the car is stopped at the destination floor, each car door 4 is moved in the door opening direction, and the detection plate 9 is displaced from the protruding position to the retracted position. As a result, the insertion into the bottom sill hole 24 of the detection plate 9 is released, and the lower rotation link 15 is separated from the microswitch 19. Thereafter, the car door 4 is moved while being engaged with the landing door 7, and the car doorway 1 and the landing doorway 6 are fully opened.

  Thereafter, the car door 4 is moved in the door closing direction, and the car doorway 1 is fully closed. At this time, with the movement of the car door 4, the detection plate 9 is displaced from the retracted position to the protruding position, and the lower portion of the detection plate 9 is inserted into the threshold hole 24. At this time, it is detected by the door control device that the lower rotation link 15 contacts the micro switch 19 and the detection plate 9 has reached the protruding position. The car can be moved by detecting that the car door 4 has fully closed the car doorway 1 and that the detection plate 9 has reached the protruding position.

  Next, the operation of the door device when an elongated foreign object such as a string 27 crosses the car sill 22 and the landing sill 25 will be described. When the car door 4 is moved in the door closing direction, the string 27 is moved in the door closing direction together with the car door 4 while being pushed by the protection piece 21. As a result, when the car door 4 fully closes the car doorway 1, the string 27 is carried to a position crossing the sill hole 24.

  On the other hand, the detection plate 9 is displaced from the retracted position toward the protruding position immediately before the car door 4 fully closes the car doorway 1. At this time, since the string 27 crosses over the threshold hole 24, the lower end portion of the detection plate 9 is caught by the string 27. Thereby, the displacement of the detection plate 9 to the protruding position is prevented by the string 27. Thereafter, the car door 4 is further moved in the door closing direction while the detection plate 9 is hooked on the string 27, and the car doorway 1 is fully closed. That is, the car doorway 1 is fully closed while the lower rotation link 15 is away from the micro switch 19.

  As a result, the presence of a foreign object is detected by the door control device, and the moving direction of the car door 4 is reversed from the door closing direction to the door opening direction.

  In such an elevator door device, the car door 4 is provided with a detection plate 9 that is displaceable between a protruding position protruding from the lower end of the car door 4 and a retracted position positioned above the protruding position. The cage sill 22 is provided with a sill hole 24 into which the lower part of the detection plate 9 is inserted when the detection plate 9 is displaced to the projecting position. Even when crossing over, the string can be tensioned by interposing the string between the detection plate 9 and the threshold hole 24, and the displacement of the detection plate 9 to the protruding position can be more reliably performed. Can hinder. Thereby, presence of a string can be detected more reliably. Further, since the detection plate 9 reaches the protruding position only when the car door 4 fully closes the car doorway 1, it is only necessary to provide a sill hole 24 in a part of the car sill 22. There is no need to provide a groove in the car sill 22 over the entire range of four movements. Therefore, the design of the door device can be improved.

  Moreover, since the guard piece 21 for moving a string to the position which prevents the displacement to the protrusion position of the detection plate 9 is provided in the lower end part of the car door 4 with the car door 4, The string can be transported more reliably to a position crossing the threshold hole 24, and the presence of the string can be detected more reliably.

  Moreover, since the sill hole 24 penetrates the car sill 22, foreign matter can be prevented from accumulating in the sill hole 24, and erroneous detection of the presence of the foreign matter can be prevented.

  Further, when the detection plate 9 is in the protruding position, the detection plate 9 also protrudes from the door closing side end portion of the car door 4 to the door closing side, so that the string 27 crosses the position away from the car sill 22 upward. Even if it exists, the string 27 can contact the detection plate 9 when the car doorway 1 is fully closed. Thereby, the detection plate 9 can be displaced with respect to the car door 4, and the string 27 can be detected more reliably.

  In the above example, a dedicated protective piece 21 is provided at the lower end of the car door 4 in order to carry the string to a position on the threshold hole 24. However, the door leg 20 is also used as a protective piece. May be. In this way, the dedicated protective piece 21 can be eliminated, and the manufacturing cost can be reduced.

Embodiment 2. FIG.
FIG. 9 is a partial sectional view showing an elevator door device according to Embodiment 2 of the present invention. FIG. 10 is an enlarged sectional view taken along line XX of FIG. In the figure, when the detection plate 9 is displaced to the protruding position, the lower portion of the detection plate 9 is inserted into the gap between the car sill 22 and the landing sill 25, and the detection plate 9 is displaced to the retreat position. The lower part of the detection plate 9 comes out of the gap between the car sill 22 and the landing sill 25.

  A plurality of door legs 31 are provided at the lower end of the landing door 7. In addition, a protective piece 32 for moving the string (foreign matter) 27 to a position that prevents the detection plate 9 from being displaced to the protruding position is provided at the door closing side end of the lower end portion of the landing door 7. Other configurations are the same as those in the first embodiment.

  Next, the operation will be described. When the string 27 crosses from the landing sill 25 to the car sill 22, the car door 4 and the landing door 7 are moved in the door closing direction, so that the string 27 is moved while being pushed by the protective pieces 21 and 32. The At this time, the string 27 is moved across the gap between the car sill 22 and the landing sill 25. Further, the position of the string 27 at this time is a position that prevents the detection plate 9 from being displaced to the protruding position.

  When the car door 4 is just before the car doorway 1 is fully closed, the detection plate 9 starts to be displaced from the retracted position to the protruding position. Thereafter, since the string 27 crosses over the gap between the car threshold 22 and the landing threshold 25, the detection plate 9 is caught by the string 27, and the displacement of the detection plate 9 to the protruding position is hindered by the string 27. . The subsequent operation is the same as in the first embodiment.

  In such an elevator door device, when the detection plate 9 is displaced to the protruding position, the lower portion of the detection plate 9 is inserted into the gap between the car sill 22 and the landing sill 25. It is not necessary to provide a sill hole into which the detection plate 9 is inserted in the car sill 22, and the structure can be simplified.

In each of the above embodiments, the present invention is applied to a double door type door device in which the car door 4 and the landing door 7 are separated from the center and open on both sides. The present invention may be applied to a single-open door device that opens only in one direction.

Claims (4)

A car door that opens and closes the car doorway,
The car door is provided at the door closing side end, and is displaceable between a protruding position protruding from the lower end of the car door and a retracted position positioned above the protruding position. An operating piece that is displaced to the protruding position by fully closing the car doorway and that is displaced to the retracted position by moving the car door in the door opening direction;
The operating piece displaced to the protruding position with the movement of the car door is inserted, and a threshold hole is provided to disengage the operating piece when the operating piece is displaced to the retracted position. A basket sill at the bottom of the doorway,
An elevator comprising: a detection switch that detects whether or not the operating piece is displaced to the protruding position; and a door control device that controls movement of the car door based on information from the detection switch. Door equipment. A car door that opens and closes the car doorway,
A landing door facing the car door and opening and closing the landing doorway while being engaged with the car door,
The car door is provided at the door closing side end, and is displaceable between a protruding position protruding from the lower end of the car door and a retracted position positioned above the protruding position. An operating piece that is displaced to the protruding position by fully closing the car doorway and that is displaced to the retracted position by moving the car door in the door opening direction;
A detection switch for detecting whether or not the operating piece is displaced to the protruding position, and a door control device for controlling the movement of the car door based on information from the detection switch,
The operating piece is inserted into a gap between a car sill provided at a lower part of the car doorway and a landing sill provided at a lower part of the landing doorway by displacement to the protruding position,
The elevator door device is characterized in that the operation piece is inserted into the gap by being displaced to the retracted position.   The lower end of the car door is provided with a protective piece for moving a foreign object to a position that prevents the working piece from moving to the protruding position by being moved together with the car door. The elevator door device according to claim 1 or 2. 3. The elevator door device according to claim 1, wherein when the operating piece is in the protruding position, the operating piece also protrudes from the door closing side end portion of the car door to the door closing side. .

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