JP6554451B2 - Tail cordless elevator - Google Patents

Description

  The present invention relates to a tail cordless elevator.

  As a tail cordless type elevator, for example, there is a technique described in Patent Document 1. Patent Document 1 describes a technique for supplying electric power from the hoistway side to the car side using a plurality of power transmission units installed on the hoistway side and a power receiving unit installed on the car side.

Japanese Patent Laid-Open No. 2002-3096

  In an elevator that uses a tail cord to release the capacitance of electrical equipment in the car and to ensure a reference potential, the core wire in the tail cord is used as the ground wire and grounded on the control panel side. The ground in the car was secured.

  However, the tailless cordless elevator described in Patent Document 1 does not mention means for securing the ground in the car. The elevator car is connected to the building side with conductive materials such as rails, main ropes, governor ropes, etc. In the case of rails, insulators such as guide rollers and anti-vibration rubber to suppress the vibration of the car while traveling It is difficult to take the ground in the car from the rail. In the case of a rope, it is difficult to secure a reference potential because the ground potential includes a frequency component due to friction between the rope strand and sheave while the elevator is running. An object of the present invention is to provide means for appropriately preventing a passenger's electric shock and ensuring a control power supply for a car in a tail cordless elevator.

  In order to achieve the above-mentioned object, the present invention provides a power transmission device installed in a hoistway and a car as an electric power feeding device that supplies electric power from the hoistway side to the car side in a contactless manner. The present invention relates to a tail cordless elevator having a power receiving unit. The tailless cordless elevator is engaged with a car door provided in the elevator car, a landing door provided in the elevator hall, and a conductor engagement device provided on the car door for engaging the landing door. A conductor engaging member provided on a landing door to be engaged with the device, and grounding wires of various electric devices of the car are connected to the engaging device, and ground wires are connected to the engaging member on the building side. When the car door and the landing door are opened, the car door engaging device and the landing door engaging element come into contact with each other.

  According to the present invention, in the tail cordless elevator, it is possible to properly secure the electric shock prevention of the passenger and the control power supply of the car.

It is a whole block diagram example of a tail cordless elevator. It is a block diagram example of a car grounding means. It is an operation example of a car grounding means. It is a flowchart for demonstrating the whole operation | movement of a tail cordless elevator. It is a flowchart for demonstrating the operation | movement of the forced discharge operation in a car in a tail cordless elevator.

  Hereinafter, the grounding means for a car according to the present invention will be described in detail with reference to the illustrated embodiments. FIG. 1 is an example of an overall configuration diagram of a tail cordless elevator. Here, the tail cordless elevator is an elevator having a non-contact power feeding system. In the present embodiment, the AC power supplied from the commercial power source 1 is converted by the power converter 2 into AC power of variable voltage and variable frequency and supplied to the motor 3, whereby the motor 3 is driven at variable speed. Ru.

  The rotating shaft of the sheave 4 is connected to the rotating shaft of the motor 3, and the rope 5 is wound around the sheave 4, and the elevator car 6 and the counterweight 7 are suspended at both ends of the rope 5 respectively. It is done.

  The elevator control device 8 controls the power converter 2 according to a rotational speed command (not shown), whereby AC power of variable voltage / variable frequency is supplied to the electric motor 3, and the elevator 6 moves up and down and travel speed. Make sure that it gets a proper stop.

  A rotary encoder 9 is provided on the rotating shaft of the electric motor 3, and the control device 8 detects the rotational speed and the car position of the electric motor 3 based on the output of the rotary encoder 9. Then, by matching this detection result with the above-described rotational speed command, execution of control according to the rotational speed command can be obtained.

  Here, although not illustrated, the car 6 includes various electric devices such as an in-car lighting device, a door machine, and a display. Therefore, it is necessary to supply electric power to these. However, in this embodiment, no tail cord is connected to the car 6 and a power supply control device 10 is provided instead.

As shown in FIG. 1, the power supply control device 10 is divided into a power transmission unit 11 and a power reception unit 12 so as to be independent of each other, so that the power supply can be obtained in a contactless manner. It has become. Then, as shown in FIG. 1, a plurality of power transmission units 11 are installed in total, one each on the stop floor of the elevator in the hoistway or a specific floor, and the power reception unit 12 is a car Only one unit is installed in 6 predetermined places such as the ceiling.
That is, each time when the elevator car 6 is stopped at each floor, power can be transmitted from the hoistway side to the elevator car side for each elevator stopped floor of the hoistway so that power can be supplied to the elevator car side. 11-2 and 11-3).

  Here, in this embodiment, the case where the number of service floors of an elevator is three, that is, 1F, 2F, and 3F is shown as an example, and therefore the number of power transmission units 11 is three.

  Next, a configuration example of the first car grounding means will be described with reference to FIG.

  The car 6 is provided with various electric devices such as a door motor 14 for opening and closing the door, a display 15, a call registration button 16, and an in-car lighting device (not shown), and a control device on the car for controlling the various electric devices. These electric devices are connected to the on-car controller 13 with a power source, mutual signals, and ground, and are connected to the door motor 14 to open and close, and the car door 19 has a platform. The engagement device 20 made of a conductor (metal) for following the landing door 23 by engaging with the door 23, and the landing door 23 follows the car door 19 by engaging with the car door 19. An engagement element 22 made of a conductor (metal) is provided, and the engagement device 20 is connected to the ground wiring from the car control device 13 by a wiring guide (not shown). A ground wire is connected to the engaging element 22 on the building side. When the car door 19 and the landing door 23 are opened, the engaging device 20 of the car door 19 and the engaging element 22 of the landing door 23 come into contact with each other. The ground of the car can be grounded to the building side.

  According to the present embodiment, the ground of the car 6 can be grounded to the building when the door is opened, and basically, when the passenger gets on and off the car, it can be grounded. . However, it is conceivable that electrostatic capacity of a level at which an electric shock is felt by the human body while the door is not opened for a certain period of time, such as during long-stroke operation, is charged in the car 6. In such a case, a capacitance detector 17 is provided, and if the charge amount in the car 6 exceeds a specified value (lower than the level at which an electric shock is felt by the human body), the elevator is operated on the nearest floor and the door is opened and closed. , You may forcibly discharge. Next, an operation example of the car grounding means will be described with reference to FIG. FIG. 3 shows the operation of the engagement device 20 as seen from the landing side.

  In this embodiment, the engaging device 20 to which the ground wire of the electric device in the car 6 is connected and the engaging element 22 grounded on the building side come into contact with each other, thereby grounding the electric device in the car 6. It is grounded.

  Here, since the engagement device 20 and the engagement element 22 are conductors (metal), there is a concern about shock or noise at the time of contact. Therefore, in this embodiment, the insulator 22 may be provided with insulators 23a and 23b such as rubber in order to prevent impact and noise when the engaging device 20 and the engaging member 22 come into contact with each other. Then, since the insulator 23 is not conductive, the ground of the car 6 can not be grounded to the building.

  Therefore, a movable engagement element 24 made of a conductor (metal) that fixes the insulators 23a and 23b is provided.

The movable engagement element 24 is connected to the ground wire on the building side described in the present embodiment.

  The movable engagement element 24 has a spring mechanism (not shown). When the car door 19 is opened by the door machine 14, the engagement device 20 first contacts the insulators 23a and 23b of the engagement element. The combined device 20 gradually pushes the insulators 23a and 23b of the engagement elements, and the insulators 23a and 23b of the engagement elements are moved by a spring mechanism (not shown).

  Thereafter, the insulators 23a and 23b of the engaging elements are completely pushed in, and the movable engaging element 24 slowly comes into contact with the engaging device 20, reducing the impact and noise at the time of contact, and grounding the car 6 with the building. Can be grounded.

  Next, the overall flow of the present embodiment will be described with reference to the flowcharts of FIGS.

  First, in FIG. 4, the elevator system according to the present embodiment is started by turning on the power in S100. When activated, in S102, initialization processing is performed as initial processing.

  Thereafter, S103 to S107 are repeated at predetermined time intervals until a power supply interruption due to maintenance inspection or the like or a program abnormality occurs.

  When the initial process is completed in S102, the process proceeds to S103 and a normal elevator operation service is performed.

  In a normal elevator operation service, when a passenger calls from the landing, first the door is opened, the ground of the car 6 is grounded and discharged, and then the operation is made to the calling floor.

  During this normal operation service, the charge condition of the car 6 is constantly monitored by the capacitance detector 17 in S107.

  Next, the forced discharge operation in S107 will be described with reference to FIG.

  First, in S201, the charging state of the car 6 is constantly monitored. If it is determined in S202 that the charged value has exceeded the specified value, the traveling state of the elevator is confirmed in S203.

  If the elevator is in the running state, the nearest floor operation is performed in S204, and the charging of the car 6 is discharged by opening the door in S205. If the elevator is stopped, the process proceeds to S205. Discharge.

  As described above, in the tail cordless elevator having the non-contact power feeding system, the ground wire of the electric device of the car 6 is connected to the engaging device attached to the car door 19 and the motor attached to the landing door 21 is connected. By grounding the doors 22 to the building, when the elevator door is opened, the ground of the car 6 can be grounded to the building side to prevent electric shock of passengers and to appropriately set the reference potential of the control power source of the car 6. It can be secured.

  That is, in a tail cordless elevator having a power transmission unit installed in the hoistway and a power reception unit installed in the car, as a power feeding device that supplies power from the hoistway side to the car side in a noncontact manner. A car engaging device provided on a car door provided in a car of the elevator, a hall door provided on the elevator hall, a car door for engaging the car door, and an engaging device Grounding wires of various electric devices of the car are connected to the engaging device, and earthing wires are connected to the engaging members at the building side, and the car door and the landing door are provided. When the door opens, the engaging device of the car door and the engaging element of the landing door come into contact. Furthermore, the engaging element further includes an insulator and a movable engaging element made of a conductor for fixing the insulating material, and the movable engaging element is connected to the ground wire of the car, and the car door is opened. The engagement device pushes the insulator of the engagement element, and the movable engagement element is in contact with the engagement device. Furthermore, a detection device for monitoring the charge amount of the car is further provided, and when it is detected that the charge amount of the car exceeds a preset specified value, the door is opened and closed forcibly on the nearest floor. Discharge the car.

  In addition, a present Example is not limited to an above-described Example, In order to demonstrate a present Example intelligibly, it described in detail. It is not necessarily limited to those having all the configurations described, and each configuration, function, processing unit, processing means, and the like of the embodiments are described in part or in whole.

DESCRIPTION OF SYMBOLS 1 Commercial power 2 Power converter 3 Electric motor 4 Sheave 5 Rope 6 Car 7 Counter weight 8 Elevator control device 9 Rotary encoder for motor 10 Power feeding control device 11 Power transmission unit of power feeding device 12 Power receiving unit of power feeding device 13 Car Upper control device 14 Door machine 15 Display 16 Call registration button 17 Capacitance detector 18 Rotary encoder for door machine 19 Car cage door 20 Engagement device 23 Ground door 22 Engager 23a, 23b Engager insulator 24 Movable Engaged child

Claims (3)

In a tail cordless elevator having a power transmission unit installed in the hoistway and a power reception unit installed in the car as a power feeding device for supplying power from the hoistway side to the car side in a noncontact manner, according to the elevator car,
A car door provided in the elevator car,
A landing door at the elevator landing,
An engagement device made of a conductor provided on the car door for engaging the landing door;
A conductor engagement member provided on the landing door to be engaged with the engagement device;
The engaging device is connected to ground wires of various electric devices of the car,
A ground wire is connected to the engaging element on the building side,
The tail cordless elevator according to claim 1, wherein when the car door and the landing door are opened, an engaging device of the car door and an engaging element of the landing door come into contact with each other. A tail cordless elevator according to claim 1,
The engaging element further includes an insulator and a movable engaging element made of a conductor for fixing the insulator, and the movable engaging element is connected to the earth wire on the building side , and the car door is When opened, the engagement device pushes the insulator of the engagement element, and the movable engagement element comes into contact with the engagement apparatus. A tail cordless elevator according to claim 1 or 2,
The vehicle further includes a detection device for monitoring the charge amount of the car, and when it is detected that the charge amount of the car exceeds a preset specified value, the door is opened and closed forcibly on the nearest floor. A tail cordless elevator that discharges the car.

Images