JP4985253B2 - Elevator landing door closing device - Google Patents

Description

  The present invention relates to a landing door closing device for an elevator that prevents a landing door closing operation from being poor due to wind pressure or the like.

  The elevator landing door is opened and closed by being gripped by an engagement guide of a cage door driven by an electric motor. Immediately before the elevator door is fully closed, the landing door is released from gripping by the cage door engaging guide. The landing door is normally fully closed by an inertial force, a weight, and a biasing force by a spring. However, wind pressure may be applied to the landing door due to the pressure difference between the hoistway and the landing hall. This wind pressure increases the door closing resistance of the landing door. Due to this door opening resistance, the landing door may not be fully closed.

  In order to solve such a problem, countermeasures have been taken by increasing the door closing force of the landing doors by adding weights and reinforcing springs. However, the door closing force that can be increased is limited due to the capacity of the electric motor of the cage door. For this reason, even if it took the said countermeasure, the effect of ensuring door closing of a landing door might be inadequate.

  Therefore, as a further means for solving such a problem, there has been proposed one that urges a force in the door closing direction by an electromagnetic force only when the wind pressure is large (see, for example, Patent Document 1).

  Further, as another solution, there has been proposed one that energizes a force in the door closing direction by electromagnetic force only when the landing door does not self-close within a certain time after the cage door is fully closed (for example, , See Patent Document 2).

JP-A-10-36046 JP-A-10-310351

  However, the device described in Patent Document 1 requires a system including an apparatus for measuring wind pressure. For this reason, there has been a problem that the cost is greatly increased.

  Moreover, the thing of patent document 2 needs to build the system containing the control apparatus of an elevator. For this reason, there was a problem that it was very difficult to apply when the said countermeasure was needed after the installation of an elevator.

  This invention was made in order to solve the above-mentioned subject, The objective is to provide the landing door closing apparatus of the elevator which prevents the failure of landing door closing operation with a simple structure.

  A landing door closing device for an elevator according to the present invention includes an engagement guide provided on a cage door, and provided on the landing door, and is gripped by the engagement guide when the landing door is opened. An engagement element that is released from gripping by the engagement guide immediately before full closing and moves with respect to the landing door, a first contact that moves in conjunction with the engagement element, and just before full closure of the landing door Provided on one of the second contact point that contacts the first contact point that has moved in conjunction with the engagement element when the engagement element is released from gripping the engagement guide, and one of the door contact portions of the landing door An electromagnet that is excited when the first contact and the second contact are in contact with each other, and that attracts each other with the other of the door contact portions by electromagnetic force generated by the excitation to fully close the landing door. It is provided.

  The present invention provides an engagement guide provided on a cage door, and is provided on a landing door, and is held by the engagement guide when the landing door is opened, while the engagement guide is immediately before the landing door is fully closed. An engagement element that is released from gripping by the first movement member and moves relative to the landing door; a first contact that moves in conjunction with the engagement element; and the engagement member is moved by the engagement guide immediately before the landing door is fully closed. A second contact that contacts the first contact moved in conjunction with the engagement element when released from gripping, and one of the door contact portions of the landing door, the first contact and The hall is configured to include an electromagnet that is excited when the second contact is brought into contact with the other of the door contact portions by an electromagnetic force generated by the excitation to fully close the landing door. Defects in the door closing operation can be prevented.

  In order to explain the present invention in more detail, it will be described with reference to the accompanying drawings. In addition, in each figure, the same code | symbol is attached | subjected to the part which is the same or it corresponds, The duplication description is simplified or abbreviate | omitted suitably.

Embodiment 1 FIG.
FIG. 1 is a front view showing the entire landing door in which the elevator landing door closing apparatus according to Embodiment 1 of the present invention is used. FIG. 2 is a block diagram of the main part of the elevator landing door closing apparatus according to Embodiment 1 of the present invention. FIG. 3 is an enlarged view of a main part of the elevator landing door closing device according to Embodiment 1 of the present invention, and shows a state in which the engaging element of the landing door being closed is gripped by the engagement guide of the cage door. FIG. FIG. 4 is an enlarged view of a main part of the elevator landing door closing device according to the first embodiment of the present invention, and follows the movement of the cage door even after the landing door is released from being held by the cage door engaging guide. FIG. FIG. 5 is an enlarged view of a main part of the elevator landing door closing device according to the first embodiment of the present invention, and the landing door does not follow the basket door after the grip by the cage door engaging guide is released. It is a figure which shows the state which the 1st contact and the 2nd contact contacted.

  FIG. 1 is a view of an elevator landing door on a predetermined floor as viewed from a hoistway (not shown). Generally, a cage (not shown) that moves up and down in the hoistway is provided with a cage door (not shown). This car door opens and closes the doorway of the car by an electric motor (not shown). Further, a pair of engagement guides 1 extend in the vertical direction on the door contact side on the back of the cage door. The engaging guides 1 are spaced apart from each other when the basket door is fully closed. Here, one of the engagement guides 1 arranged on the door-stop side is fastened to the cage door. On the other hand, the other of the engaging guides 1 arranged on the counter door contact side is arranged to be movable in the door opening / closing direction with respect to the cage door. The other of the engaging guides 1 moves in the door contact direction immediately after the cage door moves from the fully closed position in the door opening direction.

  On the other hand, a landing door 2 is provided at the landing on each floor. In the first embodiment, the landing door 2 is a central swing door. This landing door 2 is suspended from a door hanger 3. The door hanger 3 is provided so as to be movable in the horizontal direction with respect to the door rail 4. The door rail 4 extends in the horizontal direction on the hoistway side above the landing entrance 5. Here, a pair of upper and lower engaging elements 6 are provided on one door contact side of the door hanger 3. These engagement elements 6 are pivotally supported on the upper and lower ends of the attachment member 7. The center of the mounting member 7 is pivotally supported on the door hanger 3 via the shaft 8. This engagement element 6 is always urged by a spring (not shown) or the like so that the upper engagement element 6 moves downward on the door. The engaging element 6 is arranged between the engaging guides 1 when the basket arrives at a predetermined floor. Thereafter, when the cage door moves from the fully closed position in the door opening direction, the upper engaging element 6 is gripped by the engaging guide 1 in a state of moving upward and against the door against the urging force. That is, the engaging element 6 rotates by a predetermined amount around the shaft 8 in accordance with the gripping by the engaging guide 1 and the releasing of the gripping. The landing door 2 holding the engaging element 6 by the engaging guide 1 is opened in conjunction with the basket door driven by the electric motor.

  A movable interlock 9 that protrudes toward the door stop is connected to the center of the attachment member 7. An engaging portion (latch) that protrudes downward is provided on the door stop side of the movable interlock 9. On the upper surface of the engaging portion, a movable contact 10 that protrudes further to the door stop side is provided. On the other hand, a fixed-side interlock 11 is provided at the upper center of the landing entrance 5. An engaging portion that protrudes upward is provided at the end of the fixed interlock 11 facing the movable interlock 9. A lock switch 12 is provided above the fixed interlock 11 on the side opposite to the movable side interlock 9.

  Here, the engaging element 6 is released from being held by the engaging guide 1 immediately before the cage door and the landing door 2 are fully closed. In conjunction with the opening, the movable side interlock 9 rotates in the direction of engagement with the fixed side interlock 11. When the engaging portion of the movable interlock 9 is completely engaged with the engaging portion of the fixed interlock 11, the movable contact 10 and the lock switch 12 come into contact with each other. This contact confirms that the elevator is closed.

  In the present invention, a contact support member 13 that protrudes toward the opposite door is provided at the center of the attachment member 7. A first contact 14 is provided on the opposite side of the upper surface of the contact support member 13. A second contact 15 is provided above the first contact 14. The second contact 15 is a component part of the excitation switch 16. The excitation switch 16 is fastened to the door hanger 3.

  In addition, an electromagnet 17 is provided in the upper part of one door contact portion of the landing door 2. Further, an iron piece 18 is provided above the other door contact portion of the landing door 2. The iron piece 18 is disposed at a position facing the electromagnet 17. Here, the excitation switch 16 and the electromagnet 17 are connected via a power source 19 (see FIG. 2). This power source 19 is prepared separately from the power source used for elevator operation. The excitation switch 16 operates when the first contact 14 and the second contact 15 come into contact with each other. When the excitation switch 16 operates, the electromagnet 17 is energized. The energized electromagnet 17 is in a so-called excited state. The excited electromagnet 17 generates an electromagnetic force. The iron piece 18 is attracted by this electromagnetic force. As a result, the landing doors 2 are fully closed by attracting each other's door stop portions.

  Next, the elevator door closing operation will be described in more detail with reference to FIGS. First, the cage door is driven from the fully open state to the door closing direction. At this time, the engagement guide 1 maintains a state where the engagement element 6 is gripped (see FIG. 3). Then, immediately before the cage door and the landing door 2 are fully closed, the engaging element 6 is released from being held by the engaging guide 1. Immediately after the opening, an inertial force is applied to the landing door 2. Accordingly, the landing door 2 follows the cage door and moves in the door closing direction. That is, the movement of the upper engaging element 6 is restricted to one of the engaging guides 1 immediately after the opening (see FIG. 4).

  And the inertial force which acts on the landing door 2 becomes small gradually. Thereby, as for the landing door 2, the progress of door closing is delayed more than the cage door. That is, the engaging element 6 is arranged on the side opposite the door from the one of the engaging guides 1. Thereby, the movement restriction | limiting of the engaging element 6 is cancelled | released. Accordingly, the upper engaging element 6 rotates and moves downward on the door-to-door side about the shaft. The first contact 14 moves upward in conjunction with the rotation of the engagement element 6. The first contact 14 moved upward comes into contact with the second contact 15 (see FIG. 5). The excitation switch 16 is operated by the contact of the first contact 14 and the second contact 15. The electromagnet 17 is excited by the operation of the excitation switch 16. The electromagnet 17 and the iron piece 18 are attracted to each other by the electromagnetic force generated by the excitation of the electromagnet 17. The landing door 2 is fully closed by this attracting force.

  According to Embodiment 1 demonstrated above, the urging | biasing force of a door closing direction can be applied to the landing door 2 with a simple structure. For this reason, it is possible to reliably prevent the landing door closing operation from being poor due to wind pressure or the like. Further, it is not necessary to increase the capacity of the cage door drive machine. Further, the electromagnet 17 is excited by a power source 19 different from the power source used for elevator operation. For this reason, it is possible to easily attach the landing door closing device after the elevator installation even if it is necessary to take measures against a failure of the landing door closing operation due to wind pressure or the like.

Embodiment 2. FIG.
FIG. 6 is a front view showing the entire landing door in which the elevator landing door closing apparatus according to Embodiment 2 of the present invention is used. In addition, the same code | symbol is attached | subjected to Embodiment 1 and an equivalent part, and description is abbreviate | omitted.

  The landing door 2 in the first embodiment is a central swing door. On the other hand, the landing door 2 in Embodiment 2 is a one-sided door. Moreover, in Embodiment 1, the electromagnet 17 was provided in one of the door contact parts of the landing door 2, and the iron piece 18 was provided in the other of the door contact parts. On the other hand, in the second embodiment, the electromagnet 20 is provided in the upper part of the door contact portion of the landing door 2. Furthermore, the iron piece 22 is provided in the upper part in the door stop part of the vertical frame 21 of a three-way frame. In addition, you may arrange | position the electromagnet 20 and the iron piece 22 reversely.

  According to the second embodiment described above, the same effect as in the first embodiment can be obtained. Further, in the case of the one-side opening type landing door 2, the landing door closing device operates when the electromagnet 20 and the iron piece 22 are closer to each other than the central opening type landing door 2. Therefore, the biasing force in the door closing direction can be applied to the landing door 2 more reliably.

Embodiment 3 FIG.
FIG. 7 is a front view showing the entire landing door in which the elevator landing door closing apparatus according to Embodiment 3 of the present invention is used. In addition, the same code | symbol is attached | subjected to the part which is the same as that of Embodiment 2, or an equivalent, and description is abbreviate | omitted.

  In the third embodiment, the weight 23 is housed in the weight guide 24 on the side opposite the door in the high-speed landing door 2. One end of a wire 25 is connected to the top of the weight 23. The direction of the wire 25 is appropriately changed by a roller 26 or the like. And the other end of the wire 25 is connected with the door hanger 3 which suspends a high-speed landing door from the door stop side. Thereby, the load in the door closing direction is urged to the landing door 2 by the weight of the weight 23.

  An electromagnet 26 is provided at the lower end of the weight guide 24. The electromagnet 26 is a facing portion below the weight 23. The electromagnet 26 is connected to a power source (not shown in FIG. 7) together with the excitation switch 16 as in the first and second embodiments. On the other hand, an iron piece 27 is provided below the weight 23. In addition, you may arrange | position the electromagnet 26 and the iron piece 27 reversely.

  In the landing door closing device configured as described above, the excitation switch 16 is operated by the contact of the first contact 14 and the second contact 15 immediately before the landing door 2 is fully closed. The electromagnet 17 is excited by the operation of the excitation switch 16. The electromagnet 26 and the iron piece 27 are attracted to each other by the electromagnetic force generated by the excitation of the electromagnet 26, whereby the weight 24 is pulled down. And when the weight 24 is pulled down, the landing door 2 is fully closed.

  According to the third embodiment described above, the same effect as in the second embodiment can be obtained. Further, the distance between the electromagnet 26 and the iron piece 27 can be adjusted by changing the length of the wire 25. For this reason, the urging | biasing force of the door closing direction added to a landing door can be changed easily.

Embodiment 4 FIG.
FIG. 8 is an enlarged view of a main part of the elevator landing door closing device according to the fourth embodiment of the present invention, and the landing door does not follow the basket door after the holding by the cage door engaging guide 1 is released. It is a figure which shows the state which the 1st contact 14 and the 2nd contact 15 contacted. FIG. 9 is an enlarged view of a main part of an elevator landing door closing apparatus according to Embodiment 4 of the present invention, and shows a state in which the landing door is fully closed. FIG. 10 is a principal block diagram of an elevator landing door closing apparatus according to Embodiment 4 of the present invention. In addition, the same code | symbol is attached | subjected to Embodiment 1 and an equivalent part, and description is abbreviate | omitted.

  In the fourth embodiment, a demagnetizing switch 28 and a cam 29 are added to the first embodiment. Here, the degaussing switch 28 is provided at the upper center of the hall entrance 5. The demagnetizing switch 28 is provided with a shaft 28b that protrudes from the housing 28a toward the opposite door. The door end portion of the shaft 28b is disposed in the housing 28a. Further, the movement amount of the shaft 28b is regulated in the horizontal direction by the flange 28c.

  Furthermore, the shaft 28b penetrates the pressing spring 28d. The door spring side flange 28c of the shaft 28b is constantly urged toward the counter door end side by the pressing spring 28d. In addition, a contact 28e that protrudes upward is provided at an end of the shaft 28b on the door end side. A leaf spring contact 28f is provided on the opposite side of the contact 28e. The leaf spring contact 28f is provided with a base on the upper surface of the housing 28a and extends downward. On the other hand, the cam 29 is fastened to the door hanger 3. The cam 29 is opposed to the opposite end portion of the shaft 28 b of the degaussing switch 28.

  In the demagnetizing switch 28 having the above-described configuration, when the landing door 2 is not fully closed, the shaft 28b is in contact with the housing 28a by the urging force of the pressing spring 28e. It becomes a state. At this time, the contact 28e and the leaf spring contact 28f are kept in contact with each other. On the other hand, when the landing door 2 is fully closed, the opposite end portion of the shaft 28 b contacts the cam 29. As a result, the shaft 28b moves in the door closing direction together with the cam 29 against the urging force of the pressing spring 28d. Then, the contact releases the contact 28e and the leaf spring contact 28f.

  The demagnetization switch 28 is connected in series with the excitation switch 16 and the electromagnet 17 to the power source 19 (see FIG. 10). Therefore, when the contact between the contact 28e and the leaf spring contact 28f is released when the landing door 2 is fully closed, the energization to the electromagnet 17 is interrupted. Thereby, the electromagnet 17 is demagnetized. That is, the electromagnetic force by the electromagnet 17 disappears.

  According to the fourth embodiment described above, when the landing door 2 is fully closed and no load in the door closing direction is required, the electromagnet 17 is demagnetized. Thereby, useless power consumption can be suppressed. The urging force of the pressing spring 28d is set much smaller than the electromagnetic force generated by the electromagnet 17. Therefore, the door closing of the landing door 2 is not hindered by the contact between the demagnetizing switch 28 and the cam 29.

  In the first to fourth embodiments, the iron piece 18 or the like attracts the electromagnet 17 or the like. However, the iron piece 18 or the like may be replaced with another electromagnet that attracts the electromagnet 17 or the like. The first contact 14 and the second contact 15 of the excitation switch 16, the contact 28e of the demagnetization switch 28, and the leaf spring contact 28f may be either electrical contacts or mechanical contacts. In the case where these contacts are mechanical, the excitation switch 16 or the like may be provided with a contact that performs electrical contact and contact release following the contact and release of the contact 14 or the like. .

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view which shows the whole platform door where the elevator platform door closing apparatus in Embodiment 1 of this invention is utilized. It is a principal part block diagram of the elevator landing door closing apparatus in Embodiment 1 of this invention. It is a principal part enlarged view of the elevator landing door closing apparatus in Embodiment 1 of this invention, Comprising: It is a figure which shows the state by which the engaging element of the landing door in the door closing is hold | gripped by the engagement guide of a cage door. . It is the principal part enlarged view of the elevator landing door closing device in Embodiment 1 of this invention, Comprising: The state which is following the movement of a cage door even after the landing door is released from the grip by the engagement guide for the cage door FIG. It is a principal part enlarged view of the elevator door closing apparatus in Embodiment 1 of this invention, Comprising: After a landing door cancels | releases the grip by the guide for engagement of a cage door, it does not follow a cage door, 1st It is a figure which shows the state which the contact and the 2nd contact contacted. It is a front view which shows the whole landing door by which the elevator landing door closing apparatus in Embodiment 2 of this invention is utilized. It is a front view which shows the whole landing door by which the elevator landing door closing apparatus in Embodiment 3 of this invention is utilized. It is a principal part enlarged view of the elevator door closing apparatus in Embodiment 4 of this invention, Comprising: After a landing door is released from the holding | grip by the guide for engagement of a cage door, it does not follow a cage door, 1st It is a figure which shows the state which the contact and the 2nd contact contacted. It is a principal part enlarged view of the elevator landing door closing apparatus in Embodiment 4 of this invention, Comprising: It is a figure which shows the state which the landing door closed fully. It is a principal part block diagram of the elevator landing door closing apparatus in Embodiment 4 of this invention.

Explanation of symbols

1 engaging guide 2 landing door 3 door hanger 4 door rail 5 landing entrance 6 engaging element 7 mounting member 8 shaft 9 movable side interlock 10 movable contact 11 fixed side interlock 12 lock switch 13 contact support member 14 first contact 15 first contact 15 Second contact 16 Excitation switch 17 Electromagnet 18 Iron piece 19 Power supply 20 Electromagnet 21 Three-way frame vertical frame 22 Iron piece 23 Weight 24 Weight guide 25 Wire 26 Electromagnet 27 Iron piece 28 Demagnetizing switch 28a Housing 28b Shaft 28c Flange 28d Push spring 28e Contact 28f Leaf spring contact 29 cam

Claims (5)

An engagement guide provided in the basket door;
A mechanism provided on the landing door and gripped by the engagement guide when the landing door is opened, and moved relative to the landing door by being released from the grip by the engagement guide immediately before the landing door is fully closed. With Kazuko,
A first contact provided on the engagement element and moving in conjunction with the engagement element;
A second contact that contacts the first contact moved in conjunction with the engagement element when the engagement element is released from gripping the engagement guide immediately before the landing door is fully closed;
Provided at one of the door contact portions of the landing door, excited when the first contact and the second contact are in contact, and attracted to the other of the door contact portions by the electromagnetic force generated by the excitation An electromagnet that fully closes the landing door,
An elevator landing door closing device characterized by comprising: An engagement guide provided in the basket door;
A mechanism provided on the landing door and gripped by the engagement guide when the landing door is opened, and moved relative to the landing door by being released from the grip by the engagement guide immediately before the landing door is fully closed. With Kazuko,
A weight that biases a load in the door closing direction to the landing door by its own weight,
A first contact provided on the engagement element and moving in conjunction with the engagement element;
A second contact that contacts the first contact moved in conjunction with the engagement element when the engagement element is released from gripping the engagement guide immediately before the landing door is fully closed;
Provided in one of the facing portions of the weight and the lower portion of the weight and excited when the first contact point and the second contact point are brought into contact with each other by the electromagnetic force generated by the excitation. An electromagnet that pulls each other together to lower the weight and fully closes the landing door;
An elevator landing door closing device characterized by comprising: The engagement element is connected to the movable side interlock,
The first contact moves in conjunction with the movable side interlock,
The second contact point is in contact with the first contact point when the movable side interlock moves in the direction of engagement with the entrance / exit of the landing immediately before the landing door is fully closed. Item 3. A lift door closing device for an elevator according to Item 2. There is a separate power supply from the power supply used for elevator operation.
4. The elevator landing door closing apparatus according to claim 1, wherein the electromagnet is energized by the another power source. 5. It has a degaussing switch that is opened when the landing door is fully closed,
5. The elevator landing door according to claim 1, wherein the electromagnet is cut off when the landing door is fully closed and the degaussing switch is opened. 6. apparatus.

Images