JP4827465B2 - Elevator equipment - Google Patents

Description

  The present invention relates to an elevator apparatus.

  In general, an elevator apparatus lifts a car by suspending a car placed in a hoistway with a rope and winding the rope with an electric motor.

  In such an elevator apparatus, for example, when a failure of an electric motor control device, an earthquake, or the like occurs, a traveling car may stop at an intermediate floor, and passengers may be trapped in the car. In this case, in order to rescue the passengers in the car, for example, it is necessary to release a brake that brakes the rotation of the electric motor and move the car to a height of a landing where the passenger can get on and off. However, if the brakes of the car are kept released, for example, the speed at which the car descends, that is, the acceleration increases rapidly, so that the impact received by the passenger at the time of stopping increases.

  For this reason, a timed contact circuit is installed between the brake device and the power supply to intermittently energize the two, and the brake device is intermittently released to gradually lower the car and increase the descending speed. An elevator apparatus that suppresses the above is disclosed (see Patent Document 1).

  On the other hand, in an elevator system that suspends a car from a rope wound through a pulley with a weight attached and brakes the rotation of the motor that winds the rope with a brake device, when the brake device is released, the motor generates power. There is known an elevator apparatus that suppresses an increase in the lowering speed of a car by applying braking. According to this, when the car stops due to the occurrence of an earthquake or the like, the brake device is opened, and the car is moved at a low speed while applying power braking by using the balance of the car and the weight, Passengers can be rescued.

JP-A-11-335017

  However, as with the elevator device described above, even when power generation braking is applied when the brake is released, for example, if the weight of the carriage including the passenger and the weight are substantially equal and the balance between the two is maintained, the brake is released. In some cases, the car may not move due to the power generation braking of the motor.

  In addition, for example, even if the cause of the car stop is a power failure, if the motor is inadvertently operated, the safety of the rescue worker (hereinafter simply referred to as the worker) is impaired, so that the motor is driven. The power supply of the device needs to be shut off. However, for this purpose, the operator must directly operate the control device installed in the hoistway, which may delay the rescue time.

  This invention makes it a subject to provide the elevator apparatus which can rescue a passenger quickly, without an operator entering in a hoistway when a car stops.

In order to solve the above-mentioned problems, the present invention provides a car including a car suspended from a rope wound through a pulley attached with a weight, an electric motor that rotates a winding drum around which the rope is wound, and a drive including the electric motor. Brake means for braking the device, power generation braking means for short-circuiting the power supply terminal of the motor, control device for controlling the drive of the motor, brake means and power generation braking means, brake control means for controlling the brake means, and power generation braking means A power generation braking control means and a power shut-off means for shutting off the power supply of the control device, each connected via an operation line, a connector provided outside the hoistway, and an external operation device formed to be detachable from the connector The external operation device includes a brake operation switch for operating the brake control means, a power generation brake operation switch for operating the power generation brake control means, Manipulating and a power-off switch, by connecting an external operation device for operating the power-off switch in the connector, Ru blocked configured to be able to power the control unit from outside of the hoistway.

  According to this, for example, when the car stops due to a power failure or the like, a signal is output from the outside of the hoistway to the brake control means and the dynamic braking control means, and the braking of the electric motor by the braking means and the dynamic braking means is released. Can do. That is, the worker first connects an external operation device to the connector from the outside of the hoistway, operates the brake operation switch to release the brake, and determines whether or not the car moves. For example, when the car does not move due to the balance between the car and the weight, the power generation braking operation switch can be operated to release the power generation braking and move the car.

  In this way, the operator can control the motor brake and power generation braking from the outside of the hoistway without entering the hoistway, so the car can be moved to the desired landing, And passengers can be rescued promptly.

In addition , when the car stops due to a failure of the drive unit, etc., the power supply of the control device is normally cut off, but the worker is unaware of this and connected to the external operation device while it is energized for operation. Doing so will cause incompatibility. For this reason, first, an external operating device is connected and the power cut-off switch is operated to cut off the power. According to this, it is not necessary for the worker to determine whether or not the power is cut off, and the rescue operation can be performed more promptly.

  Further, the external operating device includes an external operating power supply, and is connected to the connector, and the voltage of the first operating line connected to the power generation braking operating switch and the second operating line connected to the brake operating switch. When no voltage is applied to any of the operation lines, the first and second operation lines are connected to the external operation power source. Thus, the safety of the apparatus can be further improved by automatically connecting to the external operation power source.

  Here, as the power source for external operation, for example, by using a storage battery, the external operation device can be miniaturized and the device configuration can be simplified. In addition, since the external operation device has portability, for example, the worker can quickly transport and attach the external operation device to the connector installed at the landing, so the rescue time Can be shortened.

  According to the present invention, when a car stops, a passenger can be rescued promptly without entering the hoistway.

  Hereinafter, a first embodiment of an elevator apparatus according to the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram illustrating an example of an elevator apparatus according to an embodiment of the present invention.

  The elevator apparatus according to the present invention includes a hoistway 3 for moving the car 1 up and down, a landing 5 where the car 1 stops, and an external operation device 7 for operating the car 1 from the outside of the hoistway 3.

  A car 1 is disposed in the hoistway 3 so as to be movable up and down along the rail. One end of a rope 11 is connected to the car 1, and the other end of the rope 11 is connected to the uppermost part of the hoistway 3 via pulleys 9 a and 9 b and a winding drum 10. The car 1 is suspended in a balanced manner with a weight 13 connected to a pulley 9b via a rope 11. A driving device 15 for raising and lowering the car 1 is installed in the pit of the hoistway 3 and under the vertical projection of the car 1.

  The driving device 15 includes a winding drum 10 that winds the rope 11, an electric motor 19 that rotates the winding drum 10, and a brake device 21 that brakes the rotation of the electric motor 19.

  The control device 23 is supplied with electric power from the power source 17 and controls the brake device 21 and the electric motor 19. The input unit of the control device 23 is provided with a power shut-off means (not shown). As will be described later, when a shut-off signal output from the external operating device 7 is input, the connection with the power source 17 is shut off. It has become.

  As is well known, the brake device 21 performs a braking operation by pressing a brake shoe against a brake drum by a spring force, for example. When the brake is released (released), for example, a release signal output from the control device 23 is input to a brake control means (not shown), and the spring is compressed by an electromagnetic drive or the like. Note that, during normal operation, power for opening the brake device 21 is supplied from the control device 23.

  The power supply terminal of the electric motor 19 can be short-circuited by the electromagnetic contactor 22. That is, when the electric motor 19 receives a rotational force from the load-side speed reducer, the electromagnetic contactor 22 short-circuits the power supply terminal of the electric motor 19 to operate the electric motor 19 in the electric power generation mode (electric power generation braking), and the generated electric power. In response to this, the rotation of the electric motor 19 is braked. And, for example, when the electric motor 19 is stopped, such as when the brake device 21 fails or during a rescue operation during a free-run operation, the electromagnetic contactor 22 is closed to prevent an abnormal increase in the descending speed of the car 1. It is like that. Moreover, when releasing the closed circuit of the electromagnetic contactor 22, for example, the release signal output from the control device 23 is input to a dynamic braking control means (not shown), so that the contact state is released. .

  A call button 25 that is used when a user calls the car 1 is installed at the landing 5. In the vicinity of the call button 25, a first connector 31 for connecting the external operating device 7 for emergency use is installed. The first connector 31 controls the operation line 42 connected to the circuit breaker of the power supply 17 of the control device 23, the operation line 43 connected to the brake control means of the brake device 21, and the electromagnetic contactor 22. An operation line 45 is connected to this.

  The external operation device 7 includes a second connector 35, a brake operation switch 37 for operating the brake control means of the brake device 21, and a power generation braking operation switch 39 for operating the power shut-off means of the electromagnetic contactor 22. And a power cut-off switch 41 for operating the power cut-off means of the control device 23, a storage battery 49, a change-over switch 51, and an operation device 53 for the change-over switch 51.

  A brake operation switch 37, a dynamic braking operation switch 39, and a power cut-off switch 41 are connected to the second connector 35, and can be connected to the first connector 31.

  When the second connector 35 is connected to the first connector 31, the operation device 53 determines the voltage of the operation line connected to the brake operation switch 37 and the operation line connected to the dynamic braking operation switch 39. When it is detected and no voltage is applied to any operation line, the changeover switch 51 is operated so that the brake operation switch 37 and the dynamic braking operation switch 39 are connected to the storage battery 49.

  Next, operations during normal operation and rescue operation of the elevator apparatus according to the present embodiment will be described.

  During normal operation, when there is an input from the call button 25, the control device 23 opens the brake device 21 and activates the drive device 15, and the platform where the call button 25 is input to the car 1 via the rope 11. Move to 5. Then, when the floor of the landing 5 where the car 1 and the call button 25 are input are almost the same height and reach the boarding / exiting position, the brake device 21 is braked to stop the driving device 15 and the car 1 And passengers get on and off by opening the door of the landing 5.

  Here, when an abnormality such as a power failure or a failure of the elevator device occurs while the car 1 is moving, the driving device 15 is stopped and the brake device 21 is operated to brake the electric motor 19. Stops at the position where an error occurred. In this state, when there are passengers in the car 1, if the floors of the landing 5 and the car 1 are different in height, the door of the landing 5 and the door of the car 1 are not opened, and the passenger is not in the car 1. You will not be able to get out from within yourself.

  In such a case, first, the second connector 35 of the external operation device 7 is connected to the first connector 31 installed in the landing 5. At this time, since it cannot be determined at the position of the call button 25 on the specific floor whether or not the power of the control device 23 is cut off, the power cut-off switch 41 provided in the external operation device 7 is operated to cut off the power. Make sure. As a result, the operation power of the electromagnetic contactor 22 and the brake device 21 is lost, so that the change-over switch 51 is operated by the operation device 53, and the operation power is supplied from the storage battery 49 to the brake operation switch 37 and the dynamic braking operation switch 39. Is done.

  Next, the signal output by operating the brake operation switch 37 is input to the brake control means, and the brake device 21 is released. As a result, when the car 1 starts to descend, the brake operation switch 37 is operated again to brake the electric motor 19 when the car 1 and the floor of the landing 5 are at the same height and reach the boarding / leaving position. , The doors of the car 1 and the landing 5 are opened and passengers get on and off.

  On the other hand, even if the brake operation switch 37 is operated to release the braking of the electric motor 19, the car 1 may not move. That is, normally, if the balance between the car 1 and the weight 13 is slightly broken, the car 1 is raised or lowered. However, when the braking force generated by the power generation braking of the electric motor 19 is larger than the unbalanced force of the car 9 and the weight 13, the car 1 stops, so that it is difficult to rescue the passenger.

  Therefore, in the external operation device 7, following the brake operation switch 37, the dynamic braking operation switch 39 is operated. The signal output from the power braking operation switch 39 is input to the power braking control means, and the power braking of the motor 19 is released by releasing the short circuit of the power supply terminal of the motor 19 by the electromagnetic contactor 22.

  Thus, even if the weight 13 and the car 1 are almost equal in weight by releasing the power generation braking of the electric motor 19, the car 1 starts to move up and down if the balance between the weight 13 and the car 1 is slightly lost. Therefore, the passenger can be rescued by moving the car 1 to the desired landing 5.

  In addition, the external operation device 7 of the present embodiment prevents the brake device 21 from being opened when the electromagnetic contactor 22 is opened and the dynamic braking is released in order to prevent abnormal acceleration of the car 1. It is good also as a structure which locks. Further, when the dynamic braking is released by the electromagnetic contactor 22, the electromagnetic contactor 22 may be forcibly closed before the abnormal acceleration starts to apply the dynamic braking.

  Further, for example, by using the storage battery 49 as the operation power source, the external operation device 7 can be miniaturized and the device configuration can be simplified. In particular, since the external operation device 7 is portable, the external operation device 7 can be easily connected to a connector installed at the landing 5 and can perform rescue work more quickly.

  The external operation device 7 according to the present embodiment shuts off the power supply 17 of the control device 23 and operates the brake device 21 and the electromagnetic contactor 22 from the outside of the hoistway 3. If it has, it will not be limited to said structure.

  Next, 2nd Embodiment of the elevator apparatus of this invention is described using figures. FIG. 2 is a configuration diagram illustrating an example of an external operation device other than the hoistway 3 in the elevator apparatus according to the present embodiment. Since the hoistway 3 is the same as the hoistway 3 of the first embodiment, the description thereof is omitted, and the same components are denoted by the same reference numerals and the description thereof is omitted.

  The external operation device 61 of the present embodiment is installed in the landing 5 in advance, and the power source 17 can be used as an operation power source. Here, the second connector 67 connected to the operation line 65 of the power source 17 can be connected to the first connector 63 connected to the changeover switch 51.

  Similar to the first embodiment, the external operation device 61 is provided with a power cut-off switch 41, and by operating this, the power can be cut off reliably. Further, the external operation device 61 is provided with a changeover switch 51 and an operation device 53 of the changeover switch 51, and any of an operation line connected to the brake operation switch 37 and an operation line connected to the power generation braking operation switch 39. When no voltage is applied, the changeover switch 51 functions so that the brake operation switch 37 and the dynamic braking operation switch 39 are connected to the power source 17.

  Further, the external operating device 61 is connected to the first connector 63 via the third connector 69, for example, when a failure such as a failure occurs in the power supply system. Yes.

  According to the elevator apparatus of the present embodiment, maintenance, inspection, rescue, etc. of the elevator can be realized by performing the same operation as in the first embodiment using the external operation device 61 installed at the landing 5. it can. Moreover, also in the elevator apparatus of this embodiment, it is good also as a structure which can attach or detach the brake operation switch 37, the dynamic braking operation switch 39, etc. with the hoistway 3 side via a connector similarly to 1st Embodiment. .

  As described above, according to the above-described embodiment, when the car 1 is stopped due to a power failure or a failure, the worker can enter the electric motor 19 from the outside of the hoistway 3 without entering the hoistway 3. Since such braking and power generation braking can be controlled, the car 1 can be moved to the target landing 5 and the passenger can be rescued safely and promptly. In addition, since the power supply can be reliably shut down by operating the power shut-off switch from the outside of the hoistway 3, the operator does not need to determine whether or not the power is shut off. Rescue work can be performed promptly.

It is a block diagram which shows an example of the elevator apparatus of embodiment of this invention. It is a block diagram which shows an example of an external operating device in the elevator apparatus of embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car 3 Hoistway 5 Platform 7 External operation device 9a, 9b Pulley 11 Rope 13 Weight 15 Drive device 17 Power source 19 Electric motor 21 Brake device 23 Control device 25 Call button 31 1st connector 35 2nd connector 37 Brake Operation switch 39 Power generation braking operation switch 41 Power cut-off switch 49 Storage battery 51 Changeover switch 53 Controller

Claims (3)

A car suspended from a rope wound through a pulley having a weight attached thereto, an electric motor for rotating a winding drum around which the rope is wound, a brake means for braking a driving device including the electric motor, Power generation braking means for short-circuiting the power terminal of the motor, a control device for driving and controlling the motor, the brake means, and the power generation braking means, a brake control means for controlling the brake means, and power generation braking for controlling the power generation braking means A control unit and a power supply cutoff unit that shuts off the power supply of the control device, each connected via an operation line, a connector provided outside the hoistway, and an external operation device formed detachably on the connector With
The external operation device includes a brake operation switch for operating the brake control means, a power generation brake operation switch for operating the power generation brake control means, and a power cutoff switch for operating the power cutoff means. wherein by connecting an external operation device for operating the power-off switch, Ri Na blocked configured to be able to supply the control device from the outside of the hoistway,
Furthermore, the external operation device includes an external operation power source, and is connected to the connector, and a first operation line connected to the power generation braking operation switch and a second operation line connected to the brake operation switch. An elevator apparatus that detects a voltage of an operation line and connects the power generation braking operation switch and the brake operation switch to the external operation power source when no voltage is applied to any operation line . The elevator apparatus according to claim 1 , wherein the power supply for external operation is a storage battery. The external operation device includes, elevator system according to claim 1 or 2, characterized in that a portable.

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