JPS595507B2 - Elevator landing notification device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of an arrival forecasting device installed in an elevator hall.

Generally, when an elevator car decides to stop at a floor where there is a call to answer, an arrival forecast sound is emitted to notify that the elevator car will arrive at that hall.

This arrival forecast tone may be one tone, but in the case of two tones, it is used to notify the direction of arrival, from low to high tone when arriving in the upward direction, and from high tone to low tone when arriving in the downward direction. You will be notified by multiple tones that change.

Conventionally, electromagnetic chimes, gongs, and the like have been used as the sound generator, so the sound is low and the arrival forecast sound may not be audible when the noise in the hall is loud.

Therefore, in recent years, arrival forecasting devices that use amplifiers and speakers and produce loud noises have come into practical use.

An example thereof will be explained with reference to FIGS. 1 and 2.

In the figure, (g) and d) are DC power supplies, 1a to 1e are call relay contacts that close when a car call for the 1st to 5th floors is registered in the car, and 2a to 2d are call relay contacts for the 1st to 5th floors. 1st to 4th floors each close when an up call is registered at the landing on the floor
Contacts 3b to 3e are relay contacts for calls to the up-floor halls, and 4aa to 4ea, 4 are relay contacts for down-boarding halls to the 2nd to 5th floors.
ab~4db.

4bc to 4ec and 4ad to 4ed are car position contacts that close when the car is on the 1st to 5th floor, 1st to 4th floor, 2nd to 5th floor, and 1st to 5th floor, respectively, and 5 is the car position contact that closes when the car is on the 1st to 5th floor. Upward direction IJ IJ-contacts closed during service in direction, 6
is also a downward direction relay contact, 7 is a full contact that opens when the load in the car is full, 8 is a running relay contact that is closed while the car is running, 9 is a stop relay, and 9a and 9b are its normally open contacts. , 10 is a door half-closed contact that closes when the car door is closed and opens when the door opens and then becomes half-closed;
11 is a sound generator that emits a sound when energized, 12 is a sound generator 1
1 is a microphone that inputs the sound of 1, 13 is an amplifier that amplifies the sound of microphone 12, and 14a to 14e are the 1st floor to 5th floor.
Speakers installed in the landing of the floor, 152 to 15e are thyristors of the same sex, 16a to 16e are photosensitive elements (in this case, elements whose resistance value decreases when exposed to light), 17a to
17e is a light emitting element (light bulb, light emitting diode, etc.).

Now, a case will be described in which a car that is not full responds to a call for an up hall on the 4th floor (contact 2d closed) with an up direction.

Since the car has an up direction, the up direction link contact 5 is closed, and since the car is running, the running relay contact 8 is closed, and since the car is not full, the full contact 7 is closed. .

Moreover, the door half-closed contact 10 is closed.

When the car comes to the 4th floor in this state, the car position contact 4 on the 4th floor
da~4 dd is closed.

Therefore, the stop relay 9 is energized by the circuit (g)-2d-4ab-5-7-8-9-, and self-holds by closing the contact 9a.

At this time, the up-hall call relay for the fourth floor (not shown) is deenergized because the car has responded, and the contact 2d is opened.

On the other hand, the light emitting element 17d is also energized by the circuit (1)-4dd-17d+ and emits light.

Therefore, the photosensitive element 16d receives light and its resistance value decreases.

Further, when the contact 9b is closed, the sound generator 11 emits a sound.

The microphone 12 receives this sound, converts the sound into voltage, and inputs it to the amplifier 13.

The amplifier 13 amplifies and outputs the voltage.

As a result, a circuit of 13-14d-16d-13 is established, and the bidirectional thyristor 15d becomes conductive.
-14d-15d-13 circuit, speaker 14
The output of the amplifier 13 is emitted as sound from d to the landing on the 4th floor,
Notify that the basket has arrived.

At this time, since the speakers 143 to 14e have an input of 1 watt and an impedance of about 8 ohms, the output voltage from the amplifier 13 is 2 volts and the output current is about 30 milliamps.

However, since the voltage drop across bidirectional thyristors 15a-15e reaches about 1 volt, the output voltage from amplifier 13 drops considerably across bidirectional thyristors 15a-15e.

In addition, since the bidirectional thyristors 152 to 15e do not conduct unless the voltage applied to both ends becomes 1 volt or more, small parts of the sound are cut out, and the speaker 14
There is a problem that extremely distorted sound is emitted from a to 14e.

In addition, the light emitting elements 17a to 17e1 and the photosensitive elements 16a to 1
The reality is that the response speed of 6e is slow, and in many cases the characteristics are not average.

Therefore, after the output is emitted from the amplifier 13, the bidirectional thyristors 15a to 15e become conductive i.
33, so there was a problem that sometimes the first half of the sound was cut off.

Note that similar problems occur even if transistors or the like are used instead of the bidirectional thyristors 15a to 15e.

Moreover, as a means for switching the speakers 14a to 14e,
In some cases, relay contacts are used, but in that case they open and close at low levels of several volts and hundreds of milliamps, so after several years of use, contact failure may occur due to cracks etc., causing noise. There was a problem in which it was not possible to notify the boarding area.

Note that if this problem occurs, the speakers 14a to 14e
It is necessary to polish or replace all the contacts used for switching, which requires a great deal of effort and time.

This invention solves the above-mentioned drawbacks, and aims to provide an inexpensive and highly reliable elevator landing notification device that does not distort the sound or fail to emit the sound due to voltage drop, poor contact, etc. purpose.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 3.

In Fig. 3, 9c is the normally closed contact of the stop relay 9, 20a to 2
0e is lead line, 20 aa ~ 20ea is its normally open contact (this contact is sealed with glass), 21
is a time-return type time-limited relay, and 21a is its normally closed contact.

The rest is the same as in FIG. 2.

Now, a case will be explained in which a car that is not full responds to a call at the upbound hall on the 4th floor with an upbound direction.

While the car is running, the time relay 21 operates in the circuit ()-1-9C-21-(-) and the contact 21a is open.

In this state, the car comes to the 4th floor. 4th floor car position contact 4
da~4 dd is closed.

Therefore, the reed relay 20d is energized by the circuit 20d-4dd-, and its contact 20da is closed (generally, the operating speed of a reed relay is very fast).

). Now speaker 14d is 13-14d -20d
It is connected to the amplifier 13 by the circuit a-13.

On the other hand, due to the closure of contact 4db, (+-2d-4db
-5-7- The contacts 9a and 9b are closed and the contacts 9c are opened.

Therefore, the time relay 21 is deenergized, returns after a certain period of time, and its contact 21a closes.

Then, the sound generator 11 emits sound by the circuit m-11-21a-9b-←).

This sound is received by the microphone 12, and an arrival forecast sound is emitted from the speaker 14d via the amplifier 13 to the landing on the fourth floor.

Then, when the car arrives, the door is opened, and the person has finished getting on and off the car, the door is half-closed, and the half-closed contact 10 is opened, so the stop relay 9 is deenergized and the contact 9b is opened.

When the car leaves the fourth floor, car position contact 4dd is opened, reed relay 20d is deenergized, and its contact 20da is opened.

In the above embodiment, the reed relay contacts 20 aa to 20
In order to prevent the output current of the amplifier 13 from being closed by ea, an inexpensive relay can be used since the contact capacity is small if it is not closed.

) Using timed relay 21, reed relays 20a to 20
After e is activated, sound is emitted from the sound generator 11, but the operation speed of the stop relay 9 is faster than the reed relay 20a.
It is not necessary if the operating speed is slower than ~20e.

However, if all the circuits of the stop relay 9 are made into semiconductors and the operating speed is increased, the time limit relay 21 becomes necessary.

That is, the reed relay contacts 20 aa to 20 ea
After closing, the amplifier 13 outputs an output, and then after the output disappears, the reed relay contacts 20 aa to 20 e
By opening a, the reed relay contact 20 a
It became possible to reduce the capacity from a to 20 ea.

In the above embodiment, the case where the arrival forecast tone is a single tone has been described, but it is obvious that the same method can be applied to a double tone or any other tone.

In addition, in group control elevators that use an assignment method in which a hall call is assigned to the most suitable car, and that car serves the assigned hall call and its own car call, when a car is assigned to a hall call, a single tone is emitted. Notify the boarding area,
When a car actually arrives at a landing, multiple sounds are used to notify the landing, but the same can be done in that case as well.

However, at this time, care must be taken to ensure that one car does not emit a single note and multiple notes at the same time.

In other words, if a single sound and multiple sounds are uttered at the same time, the multiple sounds will be emitted at the same platform where the single sound should be emitted, so one must be given priority when pronouncing one or the other.

In the above embodiment, the reed relays 20a to 20e whose contacts are sealed with glass have been described, but any mercury reed relay or any other relay that uses contacts with a sealed structure that does not allow dust to enter the contact area can be used. may be used.

However, it goes without saying that a glass-sealed reed relay containing inert gas is most suitable.

Further, although the case where the sound is generated using the sound generator 11 and the microphone 12 has been described, it is also possible to use one that generates the sound electrically using an oscillator.

As explained above, in this invention, when the car position contact operates, the sealed contact closes the speaker circuit, and when the car is determined to stop, the speaker makes a sound after a certain period of time, and when the car departs, the sound generator is de-energized. Since the speaker circuit is opened by the sealed contact when the car position contact becomes inoperable, an inexpensive and highly reliable elevator landing notification device can be realized.

[Brief explanation of drawings]

FIG. 1 is an elevator stop circuit diagram, FIG. 2 is a circuit diagram showing a conventional elevator landing notification device, and FIG. 3 is a circuit diagram showing an embodiment of the elevator landing notification device according to the present invention. 1a to 1e...1st floor to 5th floor car call relay contact, 2a to 2d...1st floor to 4th floor up call relay contact, 3b to 3e...2nd floor... 5th floor down hall call relay contact, 4 aa ~ 4 ea, 4 ab ~ 4
db, 4 bc to 4 ec. 4 ad~4 ed...Car position contact, 5...
...Upward relay contact, 6...Downward relay contact, 7...Full contact, 8...
Travel relay contact, 9...Stop link-110...
... Door half-closed contact, 11 ... Sound generator, 12.
...Microphone, 13...Amplifier, 1
4a to 14e...Speakers on the 1st to 5th floor landings,
20a-20e...Reed relay, 21...
...Timed return type timed relay. In the figures, the same parts are indicated by the same reference numerals.

Claims (1)

[Claims] 1. A car arrival prediction sound generated by energizing a sound generator installed in a machine room is emitted from a speaker installed in a landing area to notify the arrival of a car, which is activated when the above car approaches the above floor. A car position contact that becomes inactive after the car leaves the floor, a sealed contact that is inserted between the sound generator and the speaker and opens and closes when driven by the car position contact, and a fixed time period when the car determines to stop. a first circuit that closes the sealing contact when the car position contact is activated and energizes the sounder when the timer circuit is activated; and a first circuit that activates the sounder when the car leaves the floor. 1. An elevator landing notification device, comprising: a second circuit that deenergizes the car position contact and opens the sealed contact when the car position contact becomes inoperable.