JP3031510B2 - Elevator remote monitoring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator remote monitoring device for monitoring the presence or absence of a failure during normal operation of an elevator and, when a failure occurs, reporting the failure to a monitoring center for managing the elevator.

[0002]

2. Description of the Related Art An elevator failure not only causes a great deal of inconvenience to elevator users, but also may cause personal injury depending on the type of the failure. Therefore,
Elevators are periodically maintained and inspected in a relatively short period of time by maintenance personnel managing the elevators. by the way,
It is necessary to constantly monitor the elevator during normal operation for the presence or absence of a fault.However, it is not necessary to monitor during the above-mentioned maintenance, and if the elevator is in the monitoring state during the maintenance, an erroneous failure report may be sent to the monitoring center. is there. Therefore, during maintenance, measures are taken to cancel the monitoring state. This will be described with reference to FIG.

FIG. 2 is a circuit diagram of a conventional elevator remote monitoring device for switching between normal operation and maintenance. In the figure, S
Is a switch installed in the elevator car, having a normal operating-side terminals T ₁ and maintenance side of the terminal T _2. The terminal T ₁ is connected to the relay 1 to detect the normal operating condition, the terminal T ₂ relay 2 for detecting a maintenance state is connected. The switch S and the relays 1 and 2 are connected between the power supplies P and N.

[0004] An elevator control device constituted by using a microcomputer constantly reads out various signals of the elevator, and judges whether there is a failure in the elevator based on these signals. If it is determined to be normal, the same processing is repeated again. If it is determined that a failure has occurred, first, the excitation state of the relay 1 and / or the relay 2 is determined. Then, during normal operation of the elevator, i.e. the switch S is closed to the terminal T ₁ side, the relay 1
Is in a state of being excited, the control device stores the content of the failure determined earlier, and then connects the telephone line to the monitoring center to report the failure to the monitoring center. On the other hand, if the relay 2 is energized, that is, during maintenance switch S is closed to the terminal T ₂ side is not made, notification to the storage and monitoring center fault contents, reading the presence or absence of a failure of re various signals Is determined.

[0005]

In the above-described elevator monitoring processing, if a failure occurs in the switch S or a runaway occurs in the microcomputer, it becomes impossible to accurately distinguish between normal operation and maintenance. . And, especially when it is determined that the elevator is in the maintenance state despite the normal operation state as a result of the above-described failure or runaway,
Even if a failure occurs in the elevator, the report to the monitoring center is blocked, which causes a serious situation.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems in the prior art and to provide an elevator remote monitoring device capable of reliably reporting a failure during normal operation to a monitoring center.

[0007]

In order to achieve the above object, the present invention provides a switch for switching between normal operation of an elevator and maintenance of the elevator, and this switch is switched during the normal operation. When work first
And a second relay that operates when the switch is switched at the time of the maintenance, and when a failure occurs in the elevator during the normal operation, notifies the monitoring center that monitors the elevator of the failure. In the monitoring device, a parallel circuit of a normally open contact of the first relay and a normally closed contact of the second relay, a third relay connected to the parallel circuit and detecting an operation state, And a normally open contact of the third relay connected in series to the normally closed contact of the relay.

[0008]

When both terminals of the switch are simultaneously turned on for some reason, the first relay and the second relay are both excited, and the normally closed contact of the second relay is turned off.
However, since the first normally open contact is turned ON and the third relay is excited, it is determined that the elevator is in the normal operation state. When both terminals of the switch are simultaneously turned off from the normal operation state for some reason, the first relay and the second relay are both de-energized, and the normally open contact of the first relay is turned off. However, since the normally-open contact of the third relay and the normally-closed contact of the second relay are turned ON and the excitation state of the third relay is maintained, the elevator is determined to be in the normal operation state. Therefore, in any case, when a failure occurs in the elevator, the failure is reliably reported to the monitoring center.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. FIG. 1 is a circuit diagram of switching between a normal operation and a maintenance of the elevator remote monitoring device according to the embodiment of the present invention.
In the figure, the same parts as those shown in FIG. 2 are denoted by the same reference numerals. Reference numeral 3 denotes a relay for detecting a normal operation state or a maintenance state, 1a denotes a normally open contact of the relay 1, 2b denotes a normally closed contact of the relay 2, and 3a denotes a normally open contact of the relay 3. Relay 3,
The contacts 2b and 3a are connected in series between the power supplies P and N, and the contact 1a is connected in parallel with the contacts 2b and 3a.

[0010] When the state in which the switch S is closed to the terminal T ₁ side (normal operation state), the contact relay 1 is energized 1
a is turned ON, the relay 3 is excited and its contact 3
a turns ON. The excitation of the relay 3 determines that the elevator is in the normal operation state. On the other hand, in the above state, maintenance personnel enter the elevator car during maintenance,
Closing switch S to the terminal T ₂ side, since the relay 1 relay 2 becomes non-energized is energized, the contacts 1a, 2b both relay 3 turned OFF becomes non-excited state from excited state, contact 3a also OFF and Become. The non-excitation of the relay 3 determines that the elevator is in a maintenance state.

Here, when both terminals T ₁ and T ₂ of the switch S are simultaneously turned on for some reason, the relays 1 and 2 are both excited, the contact 1a is turned on, and the contact 2 is turned on.
b becomes OFF. When the contact 1a is turned ON, the relay 3 is in the excited state. In this case, whether the actual elevator is in the normal operation state or the maintenance state, the failure of the elevator is reported to the monitoring center.

Also, when the elevator is in a normal operation state, the relay 3 is excited, and the contacts 1a, 2b, 3a are ON, both terminals T ₁ , T _{2 of} the switch S are simultaneously turned on for some reason. When turned off, both the relay 1 and the relay 2 are de-energized and the contact 1a is turned off, but the contacts 2b and 3a are kept on.
Continues the excitation state, and in this case, whether the actual state of the elevator is the normal operation state or the maintenance state, the failure of the elevator is reported to the monitoring center.

As described above, in this embodiment, the relay 3 is provided, and the normally closed contact 2b of the relay 2 and the normally open contact 3a of the relay 3 are provided.
And the relay 3 are connected in series, the normally open contact 1a of the relay 1 is connected in parallel to the contacts 2b and 3a, and the distinction between the normal operation state and the maintenance state of the elevator is determined by the excitation and non-excitation of the relay 3. Therefore, even if an abnormality occurs in the switch, the failure of the elevator can be reliably reported to the monitoring center.

In the description of the above embodiment, the abnormality of the switch from the normal operation state has been described. However, since the abnormality of the switch from the maintenance state is not considered, the desired effect can be achieved by the above configuration. Can be.

[0015]

As described above, according to the present invention, a third relay is separately provided, and a normally closed contact of the second relay, a normally open contact of the third relay, and the third relay are connected in series. The normally-open contact of the first relay is connected in parallel with the normally-closed contact and the normally-open contact, and the third relay is energized and de-energized to determine whether the elevator is in a normal operation state or a maintenance state. Therefore, even if an abnormality occurs in the switch, the failure of the elevator can be reliably reported to the monitoring center.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of switching between normal operation and maintenance of an elevator remote monitoring device according to an embodiment of the present invention.

FIG. 2 is a circuit diagram of switching of a conventional elevator remote monitoring device between normal operation and maintenance.

[Explanation of symbols]

1,2,3 relay 1a, 2b, 3a contact S switch T _1, T ₂ terminal

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-3-259400 (JP, A) JP-A-3-211177 (JP, A) JP-A-2-310273 (JP, A) (58) Field (Int. Cl. ⁷ , DB name) B66B 3/00-5/02

Claims (1)

(57) [Claims] A switch for switching between a normal operation of the elevator and a maintenance of the elevator; and a first switch which operates when the switch is switched during the normal operation.
And a second relay that operates when the switch is switched at the time of the maintenance, and when a failure occurs in the elevator during the normal operation, notifies the monitoring center that monitors the elevator of the failure. In the monitoring device, a parallel circuit of a normally open contact of the first relay and a normally closed contact of the second relay, a third relay connected to the parallel circuit and detecting an operation state, And a normally open contact of the third relay connected in series to a normally closed contact of the relay.