JP2011153010A - Elevator device - Google Patents

Abstract

In an elevator apparatus, an unintended car door-opening traveling can be detected early and reliably to suppress the speed increase during the door-opening traveling and to significantly reduce the travel distance until the car stops. To.
In an elevator apparatus in which a car 1 travels in a door-open manner under a predetermined condition, an accelerometer 9 for detecting acceleration is installed in the car 1. When the acceleration of the car 1 detected by the accelerometer 9 exceeds a predetermined value larger than a value that can be detected when the car 1 is running open, power supply to the hoisting machine 4 and the brake device 5 is cut off. Stop the car 1 in an emergency.
[Selection] Figure 1

Description

  The present invention relates to an elevator apparatus.

  In recent years, elevators are required to prevent the car from opening the door from the viewpoint of passenger safety protection. For this reason, the elevator is provided with various safety devices and safety circuits as means for preventing unintended traveling of the car from opening.

  For example, as a conventional technique, by detecting a car position before and after relevel operation in an elevator, it is determined that an unintended car door-opening has occurred if the difference in the car position exceeds a predetermined value, Has been proposed (see, for example, Patent Document 1). In addition, in the thing of patent document 1, calculation of a car position is performed based on the pulse number from the pulse generator with which the winding machine was equipped.

JP 2007-55691 A

  In the thing of patent document 1, since the necessity of an emergency stop is judged based on the car position before and after relevel operation, a certain amount of time will be required until the judgment result is obtained. As a result, there is a problem that when the car actually runs away in the door open state, the car is abnormally accelerated until the state is detected, and the door open travel distance becomes long.

  The present invention has been made in order to solve the above-described problems. The purpose of the present invention is to suppress the speed increase during the opening of the car by detecting the unintended opening of the car in an early and reliable manner. It is providing the elevator apparatus which can shorten the travel distance until it stops.

  An elevator apparatus according to the present invention includes a car and a counterweight that moves up and down in an elevator hoistway, and a main rope that suspends the car and the counterweight in a fishing bottle type in the hoistway. An elevator device that performs an open traveling, the hoisting machine that drives the car, the brake device that brakes the hoisting machine, the accelerometer that is provided in the car and detects the acceleration of the car, and is detected by the accelerometer A power shut-off means for shutting off the power supply to the hoisting machine and the brake device when the acceleration of the car exceeds a predetermined value larger than a value that can be detected when the car is opened, It is equipped with.

  If it is an elevator apparatus according to the present invention, it is possible to suppress unintended car door opening travel early and reliably to suppress the speed increase during door opening travel and greatly reduce the travel distance until the car stops. Will be able to.

It is a figure which shows the structure of the elevator apparatus in Embodiment 1 of this invention. It is a figure for demonstrating operation | movement of the elevator apparatus in Embodiment 1 of this invention. It is a figure which shows the principal part of the accelerometer of FIG.

  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.
1 is a diagram showing a configuration of an elevator apparatus according to Embodiment 1 of the present invention, and FIG. 2 is a diagram for explaining the operation of the elevator apparatus according to Embodiment 1 of the present invention.
1 and 2, reference numeral 1 denotes a car that moves up and down in the elevator hoistway, 2 denotes a counterweight that moves in the hoistway in the opposite direction to the car 1, and 3 denotes a car 1 and a counterweight 2 in the hoistway. A main rope suspended in a fishing bottle type, 4 is a hoisting machine that drives the car 1. A part of the main rope 3 is wound around a hoisting machine 4 (drive sheave), and moves in conjunction with the rotation of the hoisting machine 4. That is, the car 1 (and the counterweight 2) moves up and down in the hoistway by driving the hoisting machine 4 and outputting torque.

  A brake device 5 is provided for braking the hoisting machine 4. During normal operation of the elevator, the brake device 5 operates when the car 1 stops to hold the hoist 4 stationary. On the other hand, in an emergency, the brake device 5 operates even when the car 1 is traveling, and generates a braking force for stopping the car 1 in an emergency. The brake device 5 has a predetermined configuration that releases the hoisting machine 4 during power feeding from the viewpoint of fail-safe and generates a braking force when power feeding is not performed.

  Reference numeral 6 denotes a power source for supplying power to the elevator system, and 7 denotes a control device that controls the operation of the entire elevator, such as control of devices in the car 1, the hoisting machine 4, and the brake device 5.

  Necessary electric power is supplied from the power source 6 to the devices in the car 1, the hoisting machine 4, and the brake device 5. That is, the hoisting machine 4 generates necessary torque by being fed from the power source 6. In addition, the brake device 5 is supplied with power from the power source 6 to release the brake so that the hoisting machine 4 can be driven. The hoisting machine 4 and the brake device 5 are supplied with electric power from the power source 6 via a conductor 8 (blocking means) in the control device 7.

  Moreover, the said control apparatus 7 has the function to drive the cage | basket | car 1 in a door open state on predetermined conditions. For example, the control device 7 performs relevel operation control when the car 1 is landed, and automatically corrects the car position. The relevel operation means that the car 1 is opened when the extension amount of the main rope 3 increases or decreases due to a change in the number of passengers in the car 1 and the car 1 deviates from a predetermined landing position. This is an operation in which the car 1 is moved at a low speed while being in a state and the car 1 is returned to the predetermined landing position.

  The elevator apparatus also includes an accelerometer 9 that detects the vertical acceleration of the car 1 and a power shut-off means 10 that makes the car 1 perform an emergency stop under a predetermined condition based on the detection result of the accelerometer 9. Is provided. FIG. 3 is a diagram showing the main parts of the accelerometer and the power shut-off means of FIG.

  The accelerometer 9 is provided in the car 1 and has a predetermined mechanism for mechanically detecting the vertical acceleration of the car 1. For example, the accelerometer 9 includes weights 11a and 11b provided on the car 1, and springs 12a and 12b that urge the weights 11a and 11b. The weights 11a and 11b are guided to move in the traveling direction, that is, the vertical direction with respect to the car 1, and are urged upward by springs 12a and 12b, respectively. That is, the accelerometer 9 shown in FIG. 3 outputs the acceleration of the car 1 as the displacement of the weights 11a and 11b.

  The power shut-off means 10 shuts off the power supply to the hoist 4 and the brake device 5 when the acceleration of the car 1 detected by the accelerometer 9 exceeds a predetermined reference value. Has an emergency stop function. The reference value is set to a predetermined value that is larger than a value that can be detected when the car 1 normally travels open doors (for example, during the relevel operation).

  The power shut-off means 10 includes, for example, limit switches 13a and 13b provided on the car 1 and the conductor 8 (cut-off means). The limit switches 13a and 13b operate when the displacements of the weights 11a and 11b of the accelerometer 9 exceed a certain value and open their contacts. That is, when the upward displacement of the weight 11a exceeds the predetermined value and the weight 11a reaches a predetermined operating position, the limit switch 13a operates to open the contact. Similarly, when the downward displacement of the weight 11b exceeds the predetermined value and the weight 11b reaches a predetermined operating position, the limit switch 13b operates to open the contact.

  As shown in FIGS. 1 and 2, the limit switches 13a and 13b constitute a circuit with the drive power source of the conductor 8. For this reason, when the limit switch 13a or 13b operates, the contact of the conductor 8 is opened, and the power supply to the hoisting machine 4 and the brake device 5 is cut off. FIG. 2 shows a state in which the contact of the conductor 8 is opened and the power supply to the hoisting machine 4 and the brake device 5 is cut off.

  With the elevator device having the above-described configuration, the speed at the time of opening the door 1 is suppressed by detecting the opening of the car 1 at an early stage and reliably, and the travel distance until the car 1 is stopped urgently is greatly reduced. Can be made. That is, it is possible to provide an elevator device with higher reliability in consideration of passenger safety.

  In this elevator apparatus, since the acceleration of the car 1 is detected by the accelerometer 9 installed directly on the car 1, the time required for detecting the opening of the door is greatly shortened, and the speed increase of the car 1 is suppressed. Can do. For this reason, even when the car 1 runs away in the door open state, the abnormality can be detected at an early stage, and the operation for immediately stopping the car 1 can be immediately performed.

  Further, since the accelerometer 9 has a mechanical detection mechanism, the calculation of the car position and the like are not required. In addition, since the accelerometer 9 operates independently of drive control for the car 1 and the like, the reliability of the apparatus is improved.

  The power shut-off means 10 may be configured to operate only when the control device 7 controls relevel operation. In such a case, when the detected acceleration of the accelerometer 9 exceeds the reference value during the relevel operation, the power cutoff unit 10 cuts off the power supply to the hoisting machine 4 and the brake device 5.

DESCRIPTION OF SYMBOLS 1 Car 2 Balance weight 3 Main rope 4 Hoisting machine 5 Brake device 6 Power supply 7 Control device 8 Conductor 9 Accelerometer 10 Power supply interruption means 11a, 11b Weight 12a, 12b Spring 13a, 13b Limit switch

Claims (5)

A car and a counterweight that move up and down in the elevator hoistway;
A main rope for suspending the cage and the counterweight in a fishing bottle manner in the hoistway;
An elevator apparatus in which the car performs door-opening traveling under predetermined conditions,
A hoist that drives the car;
A brake device for braking the hoisting machine;
An accelerometer provided in the car for detecting the acceleration of the car;
When the acceleration of the car detected by the accelerometer exceeds a predetermined value larger than a value that can be detected when the car is open, the power supply to the hoisting machine and the brake device is cut off. Power shut-off means for emergency stopping the car;
An elevator apparatus characterized by comprising: A control device for controlling relevel operation for automatically correcting the car position when the car is landed;
The elevator apparatus according to claim 1, further comprising:   The elevator apparatus according to claim 2, wherein the accelerometer has a predetermined mechanism for mechanically detecting the acceleration of the car. The accelerometer
A weight provided in the car, the movement of which is guided in the traveling direction of the car;
A spring for biasing the weight to one side;
With
The power shut-off means is
A limit switch provided on the car and operating when the weight reaches a predetermined position;
A shut-off means for shutting off power supply to the hoisting machine and the brake device by operating the limit switch;
The elevator apparatus according to claim 3, further comprising:   5. The power supply shut-off unit operates only when re-level operation is controlled by the control device, and cuts off power supply to the hoisting machine and the brake device. The elevator apparatus in any one of.

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