JPS6153987B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an elevator alarm device that issues an alarm when a door lock device of an elevator landing door is unlocked.

Figure 1 shows the general structure of an elevator installed in a four-story building.
It has entrances and exits 2E to 5E leading to elevator halls 2 to 5 on the second floor, which serves as a sales floor, and the third floor, which serves as living rooms. Reference numeral 6 denotes a machine room located at the top of the hoistway 1 and housing drive devices such as the hoisting machine 7; 8 is an elevator car that ascends and descends within the hoistway 1; It is hooked to one end of a rope 9 suspended from the. 10 is an elevator counterweight whose top is hooked to the other end of the rope 9; 11 is the car 8;
A car door 11a is provided at the top of the car door and opens when the car door 11 starts to open and closes when the car door closes. 12 to 15 are gate switches for each of the above-mentioned entrances and exits 2E. ~5
The landing doors 12L to 15L, which are provided at E and open and close by engaging with the car door 11, are the landing doors 12 to 15L.
This is a door lock device that is installed on the top of each car door 15 and locks when the landing door is closed.
1 is opened, and is unlocked by using a key from the elevator halls 2 to 5 side. Reference numeral 16 denotes a key-operated stop switch installed at the floor where the car 8 is not in use, such as the elevator hall 2 on the first basement floor, which allows the elevator to operate normally during the day, and stops the elevator when the elevator is not in use, such as at night. I'll leave it to you.

An elevator constructed in this manner is normally operated as follows.

When the car 8 is currently waiting in the elevator hall 2 on the first basement floor with the car door 11 and landing door 12 closed, when the call button (not shown) for the elevator hall 4 on the second floor is pressed, the hoisting machine 7 As a result of the rotation, the car 8 starts ascending operation toward the second floor via the rope 9. When the car 8 approaches the elevator hall 4 on the second floor, a landing device (not shown) is activated to cause the car 8 to land in the elevator hall 4 on the second floor. Next, the car door 11 starts to open by a door opening/closing device (not shown), and the door lock device 14L is unlocked by the car door 11.
The landing door 14 and the landing door 14 engage with each other and open at the same time. Incidentally, when the car door 11 starts to open, the gate switch 11a is also opened. When a person finishes getting on and off, the car door 11 engages with the landing door 14 and begins to close automatically or by pressing a door close button (not shown). After closing, gate switch 1
1a closes, and the door lock device 14L
Since the landing door 14 is locked, the elevator car 8 continues to operate in response to the next call. When there is no longer a need to use the elevator, such as at night, the pause switch 16 is turned on.
By operating the car 8, the car door 11 is closed in the elevator hall 2 on the first basement floor, which is the rest floor, and the landing door 12 is locked, thereby stopping the elevator. This makes it impossible to use elevators to access the building, and ensures security on each floor at night.

The above is normal operation, but if car 8 is stopped between elevator hall 2 on the first basement floor and elevator hall 6 on the first floor due to other power outages or malfunctions, and passengers are trapped inside car 8, The landing door 14 may be opened from the elevator hall 4 on the second floor to rescue passengers, or the landing door 12 may be opened from the elevator hall 2 on the first basement floor when entering the bottom of the hoistway 1 for equipment repair or adjustment. When opening the door, first unlock the door lock devices 12L to 15L from the elevator halls 2 to 5 side, and then open the landing doors 12 to 15.
It opens.

However, in the case of an elevator configured in this way, the door lock devices 12L to 15L can be unlocked from the elevator halls 2 to 5 side, so using this, especially when the elevator is in a dormant state at night, the first door lock device can be unlocked. As shown in the figure, from the elevator hall 8 on the first floor, which can be freely accessed, unlock the door lock device 13L of the landing door 13, open the landing door 13, enter the hoistway 1, and then go to the sales area 2. In order to infiltrate a floor, etc., a problem sometimes occurs in which a person unlocks the door lock device 14L from the hoistway 1 side, opens the landing door 14, enters the elevator hall 4 on the second floor, steals money and goods, and escapes. It was hot.

By the way, a device that detects the abnormal opening of a landing door and issues an alarm has already been devised, for example in Utility Model Application No. 1983-69569, but such a device does not prevent passengers from entering the hoistway. Since its purpose is to prevent falls, an alarm is only issued when a landing door on a floor where a car is not stopped is opened. In other words, even if the landing door is unlocked and opened on the floor where the car is stopped, no alarm is issued. Therefore, since such a device issues an alarm only under limited conditions, it is not sufficient for the purpose of preventing illegal intrusion as described above.

This invention was made in view of the above points, and provides an elevator that detects and issues an alarm when a landing door is opened while the elevator is in a resting state, thereby preventing illegal entry, etc. The purpose of this invention is to provide a warning device for the following.

An embodiment of the present invention will be described below based on FIGS. 2 and 3. In the figures, 12a to 15a
are provided at the top of landing doors 12 to 15, respectively.
A door switch that opens when the door lock device 12L to 15L is unlocked and closes when it is locked; 16 is a single-pole, double-throw pause switch;
a, 16b and 16c. 17 is a position switch that closes when the car 8 reaches the elevator hall 2 on the 1st basement floor, which is the dormant floor; 18
is a coil of a gate switch relay which is energized when the gate switch 11a is closed, and together with the gate switch 11a constitutes a car door detection device. The normally open contact 18a is a time-limited operation/instantaneous return contact that closes after a predetermined time delay after the coil 18 is energized. 19 is a door switch 12a to 15a
The coil of the door switch relay, which is energized when all the doors are closed, constitutes the door switches 12a to 15a and the landing door detection device. 19a is this normally open contact, and 19b is this normally closed contact, which is an instantaneous operation/time-limited return contact that closes after a predetermined time delay after the coil 19 is deenergized. Reference numeral 20 denotes a coil of an operation relay that commands operation/pause to a device (not shown) that controls elevator elevation and door opening/closing;
6 is connected to one contact 16a. 21 is a contact that is open for a certain period of time while the car 8 is ascending and descending, and after stopping; 22 is a coil of a pause relay that detects when the elevator is in a pause state;
It is connected to the other contact 16b of the pause switch 16 via the position switch 17, contact 21, normally open contact 18a and normally open contact 19a. 22a and 2
2b is the normally open contact, 23 is the alarm device installed in the elevator hall 2 on the first basement floor, and the normally open contact 2
2b via a normally closed contact 19b.
E is a control power source.

In the elevator alarm system configured in this way, during normal operation, the stop switch 16 is connected to the terminal 1.
6a and terminal 16c, and the coil 20 of the operating relay is
Energized at 0-E, the elevator operates as shown in FIG. At this time, the coil 22 of the pause relay is deenergized by the pause switch 16, so the normally open contact 22b is open. Also, while the car 8 is being raised or lowered, the door switch relay 19 is energized, so the normally closed contact 19b is released.
The alarm device 23 is never activated.

On the other hand, if there is no need to use the elevator at night, etc., operate the pause switch 16 and use the terminal 16.
When switching from terminal a to terminal 16b, operation relay 20 is deenergized and a stop command is issued. In response to this stop command, the car 8 is called to the 1st basement floor, which is the rest floor, and stops. At some point, the car door 11 and the landing door 12 are opened, and after dropping off the passenger, the car door 11 and the landing door 12 are closed. , the elevator will be in a dormant state. Note that the contact 21 closes after a certain period of time has elapsed since the car 8 stopped on the first basement floor. In such a rest state, the coil 18 of the gate switch relay is connected to E-1.
The contact 18a is energized by the circuit 1a-18-E and immediately closes, and the door lock devices 12L-15L of the landing doors 12-15 are locked, so the door switches 12a-15a are closed. Relay coil 19 is E-12a-13
a-14a-15a-19-E, contact 19a is immediately closed and contact 19b is immediately open. Furthermore, coil 2 of the pause relay
2 is E-16c-16b-17-21-18a-
19a-E, its contact 22a is closed, and E-16c-16b-17-21-
22a-E. Further, although the contact 22b of the alarm device 23 is closed, the contact 19b is opened before that, so the alarm device 23
3 will never work.

When the elevator is in a dormant state like this,
For example, an intruder from the first floor, where the car 8 is not stopped and can come and go freely, may access this door lock device 1.
When 3L is unlocked and the landing door 13 is opened, the door switch 13a is opened and the coil 19 of the door switch relay is deenergized, so the contact 19a is opened, but the self-holding circuit energizes the coil 22 of the pause relay. Since the normally open contact 22b is closed and the normally closed contact 19b is closed, E-22b
-19b-23-E causes the alarm device 23 to issue an alarm to notify that there is an intruder.

In the above embodiment, the gate switch 11a detects that the car door 11 is closed, and the door switches 12a to 12a detect that the landing doors 12 to 15 are unlocked.
Although the position switch 15a and the position switch 17 for detecting the positions of the car 8 have been described as switches each having a contact point, a non-contact switch such as a proximity switch may also be used. Further, although the embodiment shown in FIG. 3 has been explained as a relay circuit, it may be constructed as a non-contact circuit. Further, although the alarm device 23 in the above embodiment was explained as using a dedicated device installed in the elevator hall, it may also be used as an emergency bell in the building.
Alternatively, an automatic dialing device may be used to directly notify the security company.

As explained above, this invention is provided with an alarm device that issues an alarm when an elevator stop signal and a landing door open signal are input at the same time. Regardless of whether the floor and the floor where the landing door that has been opened illegally matches or does not match, an alarm is issued based on the opening of the landing door, which has the effect of preventing theft using the hoistway.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view showing the general structure of an elevator, FIG. 2 is a view corresponding to FIG. 1 showing an embodiment of the invention, and FIG. 3 is a circuit diagram of FIG. 2. 1... Hoistway, 8... Car, 11... Car door,
11a... Gate switch, 12-15... Landing door, 12a-15a... Door switch, 12L-
15L...door lock device, 16...pause switch, 17...position switch, 22...pause relay, 23...alarm device. Note that the same parts in the figures are indicated by the same reference numerals.

Claims (1)

[Claims] 1 A stop switch that stops the elevator, a stop detection device that issues a stop signal when the stop switch is operated, a landing door detection device that detects that the landing door is unlocked and issues a door open signal, and a stop switch that issues a stop signal when the stop switch is operated; An elevator alarm system equipped with an alarm system that issues an alarm when a signal and a door open signal from a landing door detection device are input at the same time.