JPH0295680A - Detecting device for cage position in case of emergency - Google Patents

Abstract

PURPOSE:To permit an elevator to be suspended even by one operator positively with ease by sounding a buzzer for warning intermittently as a cage comes close to a specified position for suspension, and thereby constituting the intermittent interval of sounding to be made shorter gradually. CONSTITUTION:When a cage is suspended because commercial power has stopped and so on, an operator in an elevator machine room turns a power supply switch SW on, manually actuates the brake lever of a braking mechanism thereafter so as to gradually release the lock of the rotating shaft of a sheave so that the cage gradually comes close to a specified position for suspension. A floor position judging section 3 compares the detected signal from a pulse counter 2 with the floor position data signal from a floor position data section 4 so that the present position of the cage is judged from time to time. And as the cage gradually comes close to a specified position, the pulse interval produced by a buzzer control section 7 is designed to be made shorter depending on the distance between the present position of the cage and the specified position.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an emergency car position detection device used in an elevator.

(Prior Art) The general configuration of an elevator system is to wind a wire around a sheave (sheave), with an elevator car attached to one end and a weight attached to the other end, and this sheave to be connected to the elevator. It is configured to be rotated by a driving electric motor.

If any abnormality occurs in the elevator system or a power outage occurs, the drive of the elevator drive motor will be automatically stopped, and the sheave's rotating shaft will also be automatically locked by the brake mechanism. It has become so.

Therefore, it is possible for an elevator car to stop in the middle of a floor. In such a case, the staff in the elevator machine room must move the car to the nearest location in order to rescue a user who is trapped inside the car. It is necessary to move it to the specified position on the floor.

FIG. 3 is a schematic configuration diagram showing a conventional emergency car position detection device used when moving the car to a predetermined position on the nearest floor. Hereinafter, the conventional device will be briefly explained based on this figure.

First, in order to move a car that has stopped halfway up a floor when a power outage occurs, the staff in the elevator machine room (in which the elevator drive motor, sheave, etc. mentioned above are installed) must turn on the power supply. Turn on the switch SW to enable power to be supplied to the car position detection device 1 from an emergency power source such as a battery. Then, by manually operating the brake lever of the brake mechanism, the staff member gradually unlocks the rotating shaft of the sheave and raises or lowers the car. At this time, whether the car ascends or descends is determined by the balance between the TIZm of the entire car including the user and the weight.

In this way, when the car starts to move, the pulse generator (a light emitter is attached to the side of the sheave) attached to the sheave serves as a floor position detection means.The light emitted from this light emitter is formed on the sheave. ) sends either a rising pulse or a falling pulse to the pulse counter 2. The pulse counter 2 sends a detection signal corresponding to the number of pulses to the floor position determination unit 3.
On the other hand, the floor position data section 4 also outputs a floor position data signal stored in advance to the floor position determination section 3. Then, the floor position determining section 3 compares these signals to determine the current floor position of the car, and displays the result on the LED display 5 as a display section.

The staff member manually operates the brake lever while visually observing the display on the LED display 5 (if the position of the LED display 5 and the position of the brake lever are far apart, the LED
Since the display 5 cannot be viewed visually, two staff members are required.

), and as the displayed value gradually approaches the predetermined stopping position of the car, the brake lever is squeezed down.

Then, when the car reaches a predetermined stop position, a buzzer 6 as a warning sound generating means sounds, so that the attendant fully squeezes the brake lever to completely stop the car.

(Problem to be Solved by the Invention) However, it is by no means easy to adjust the aperture of the brake lever while visually checking the LED display 5, and it is especially difficult to adjust the brake lever in the car, which requires a certain degree of skill and skill. When the number of users is extremely large and when the number of users is extremely small, the amount of brake lever tightening and the timing at which the brake lever is completely closed will differ greatly, and the car will often stop at a distance far from the predetermined stopping position. be.

In addition, if the LED display 5 and the brake lever are installed far apart, the staff member who visually observes the LED display 5 will be able to tell the staff operating the brake lever whether the displayed numerical value or brake lever aperture is correct. You will have to verbally communicate the adjustments. Therefore, it has become even more difficult to completely perform the above-mentioned braking operation on the car.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to make it possible for L4 in charge to stop the car by himself when stopping the car at a predetermined stop position by braking in an emergency. An object of the present invention is to provide an emergency car position detection device that can be easily and reliably detected even when the car position is detected.

[Structure of the invention]

(Means for Solving the Problems) As a means for solving the above-mentioned problems, the present invention provides that, as the car approaches a predetermined stopping position,
The warning sound control section is provided to control the warning sound generating means so that the warning sound is emitted intermittently, and the intermittent intervals become gradually shorter.

(Operation) According to the above configuration, the intermittent interval of the warning sound becomes gradually shorter, so that the attendant can identify that the car is approaching the predetermined stop position.

Then, by adjusting the amount of braking operation in accordance with the degree to which the intermittent interval becomes shorter, the car can be accurately stopped at a predetermined stop position.

(Example) Hereinafter, an example of the present invention will be described based on FIGS. 1 and 2. However, the same components as in FIG. 3 are designated by the same reference numerals, and their redundant explanation will be omitted.

In FIG. 1, reference numeral 7 denotes a buzzer control section as a warning sound control section, and the intermittent interval of the buzzer 6 as a warning sound generating means can be controlled based on the output signal of the floor position determination section 3. It has become.

The intermittent interval becomes shorter as the car approaches a predetermined stop position, and when the car reaches a predetermined stop position, a continuous warning sound is emitted for a certain period of time. .

Next, a description will be given of an operation in which an attendant stops a car at a predetermined stop position using the car position detection device configured as described above.

It is assumed that the car has stopped due to an accident such as a power outage at a position number between the Nth floor and the N2th floor.

In such a case, the staff member in the elevator machine room turns on the power switch SW and then manually operates the brake lever of the brake mechanism described above to gradually unlock the rotating shaft of the sheave. As a result, the car ascends toward the Nth floor, for example, and gradually approaches a predetermined stopping position on the N2 floor.

The movement of the car at this time is represented by curve A in FIG. 2(a). In this characteristic diagram of FIG. 2(a),
The horizontal axis shows each position in the elevator hoistway, and the vertical axis shows
It shows the distance between the current position of the car and the predetermined stopping position on the N2 floor.

Then, as the car rises, the distance value gradually decreases along the curve A, but when the value becomes less than a certain value, the buzzer control unit 7 operates as shown in FIG. 2(b). , generates a pulse P1 of width t. This first pulse P
1, the buzzer 6 is set to t. Generates a warning sound for only a second.

The buzzer control unit 7 generates the second pulse P2 when t seconds have elapsed since the generation of the first pulse P1, and thereafter generates the second pulse P2.
2 seconds, ts seconds, ... every elapsed time (tl>t 2 > t
s), the third, fourth, etc. similar pulses P
2. P3. ...is generated.

That is, the floor position determining section 3 compares the detection signal sent from the pulse counter 2 and the floor position data signal sent from the floor position data section 4, thereby
The current position of the car is determined sequentially. Then, the position of the car gradually approaches a predetermined position on the N2 floor, but the pulse intervals tt, t2, . t3... is designed to become shorter.

Various configurations of the buzzer control section 7 having such a function are possible. As an example, it is conceivable that the buzzer control section 7 is constituted by a voltage level control circuit and a pulse generation circuit. In other words, when a signal indicating the floor position is sent from the floor position determination unit 3 to the voltage level control circuit, the voltage level control circuit changes the signal so that the closer to the predetermined position on the N2 floor, the smaller the value. Control the voltage level so that Then, the pulse generating circuit sequentially transmits pulse intervals t■, t2, . Nokurusu P where t3 becomes shorter 1. P2
, Pa are generated.

In this way, the car continues to rise, and after the time when the distance finally reaches zero, that is, the time when the car reaches a predetermined stopping position on the N2 floor, the output from the buzzer control section 7 maintains the H level. There is no particular restriction on the time to maintain this H level, but in this embodiment, t
The H level shall be maintained for a second.

Due to the function of the buzzer control unit 7 as described above, the warning sound emitted from the buzzer 6 becomes intermittent, and the intermittent interval becomes shorter as the car approaches the predetermined stopping position on the N2 floor.

Therefore, the staff member who manually operates the brake lever gradually squeezes the brake lever in response to the shortening of the intermittent interval of the warning sound, and closes the brake lever just before the warning sound changes from intermittent to continuous sound. Just try to narrow it down. According to such a procedure, the staff member can easily and accurately stop the car at a predetermined stopping position on the N2 floor without visually checking the LED display 5.

In the above embodiment, the pulse PP shown in FIG. 2(b)
All widths of P... are set to a constant width of 10 1 ゛ 2
3 However, these widths can also be set to be large at first and then gradually reduced.

〔Effect of the invention〕

As explained above, according to the present invention, the warning sound emitted from the warning sound generating means can be made into an intermittent sound whose intermittent intervals become gradually shorter as the car approaches a predetermined stop position. When a car is stopped at a predetermined stop position by a braking operation in an emergency, even one staff member can easily and reliably perform the stopping operation.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a schematic configuration of an embodiment of the present invention;
2(a) and 2(b) are explanatory diagrams for explaining the operation of FIG. 1, and FIG. 3 is a block diagram schematically showing the configuration of the conventional device. 3... Floor position determination unit, 5... Display unit (LED display), 6... Warning sound generating means (buzzer), 7... Warning sound control unit (buzzer control unit).

Claims (1)

[Scope of Claims] A floor position determination unit that compares pre-stored floor position data with a detection signal from a floor position detection means to determine the current floor position of the car in an emergency; a display unit that displays the floor position determined by the floor position determination unit; and when the floor position determination unit determines that the car has stopped at a predetermined stop position due to a braking operation on the car; , a warning sound generating means for emitting a warning sound, and in the emergency car position detection device, the warning sound is emitted intermittently as the car approaches the predetermined stop position, and the intermittent interval is An emergency car position detecting device, comprising: a warning sound control unit that controls the warning sound generating means so that the warning sound is emitted in a manner that gradually becomes shorter.