JP3202452B2 - Elevator safety switch short circuit device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety switch short-circuit device for an elevator used for checking an operation state when a safety switch for detecting an abnormality of an elevator is operated.

[0002]

2. Description of the Related Art In order to operate an elevator safely, it is necessary to periodically perform an operation check of each part of the apparatus. However, such an operation check is not sufficient for each part that operates during normal operation. In addition, regarding the safety switch that operates when the elevator is abnormal, it is necessary to confirm the operation and the operating condition at the time of the operation.

In order to check the operating condition when the safety switch is operated, a conventional Japanese Patent Laid-Open No. 3-177285 has been proposed.
As described in Japanese Patent Application Laid-Open Publication No. H10-260, an elevator safety switch short-circuit device using an intercom circuit has been proposed. This prior art includes detection means for detecting a call state of an intercom installed in a machine room, and short-circuit means for short-circuiting a safety switch only while the detection means detects the call state of the interphone. When the intercom in the machine room is not in the ringing state, the same state as when the safety switch is activated, that is, the state in which the operation stop command is issued by the safety switch is maintained, but the operator presses the interphone call button in the car. When the intercom in the machine room is set to the calling state, the detecting means detects this and the short-circuit means short-circuits the safety switch, and thus the operation stop command is released, so that the car operates via the elevator control device. I can do it. Therefore, even one worker can perform an operation check operation when the safety switch is activated, and the car can be operated only while the intercom call button is pressed, so that safety during the operation can be secured.

[0004]

However, the above-mentioned prior art is provided with a pre-installed intercom circuit in order to prevent an intercom installed outside a caretaker's room or the like from sounding even if the intercom call button in the car is pressed. Part of the work must be left open or the manager must be instructed not to pick up the handset even if the intercom rings, in any case, the preparation work prior to the actual operation check is complicated There was a defect that was. In addition, since the above-described related art uses an intercom circuit, in the case of an intercom using a battery as a power source, the battery is greatly consumed, and when an accident such as being trapped in a car occurs, for example, There was a risk that the intercom could not be used.

The present invention has been made in view of such problems of the prior art, and has as its object to perform an operation check operation at the time of operating a safety switch without performing a complicated preparation operation, and to provide an existing elevator device. Does not adversely affect
An object of the present invention is to provide an elevator safety switch short-circuit device.

[0006]

SUMMARY OF THE INVENTION The above object of the present invention is attained by:
Detect abnormalities in the betaAnd a normally closed contact that opens
MultipleSafety switchDetected an elevator malfunction
Time,Stop driving the carConfigured as aboveD
The betaWhen an abnormality is detectedUsed to check the operation status of
Safety switch short-circuit device for elevatorsDuplicate
Number ofSwitching sectionCorresponding to each operation of
DifferentA transmitter that outputs an electromagnetic wave of a predetermined frequency,The sending
From the receiverReceives electromagnetic waves of the specified frequencyWhen you do
A plurality of normally-open valves that close in accordance with the different predetermined frequencies.
With a built-in contact, the normally open contact and the normally closed contact
Multiple sets of connections for detachable parallel connection
With connection terminalWith receiverConsisting of
You.

[0007]

[Operation] First, a plurality of sets of connection terminals are arranged in parallel with a normally closed contact.
After the row connection, the receiver is installed near the control device of the elevator, and when the transmitter is not switched on, the same state as when the safety switch is activated, and the electromagnetic wave of a predetermined frequency is output from the transmitter. The safety switch can be set to be short-circuited and the operation stop command is blocked when it is in operation, so that the worker with the transmitter must remotely check the operation when the safety switch is activated from the car. can be, also, without using the interphone or the like of the elevator, it is possible to remote control by the transmitter to detect the receiver of the electromagnetic waves output, there is no adversely affect the existing elevator system.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. Here, FIG. 1 is a circuit diagram showing a short circuit of the safety switch in the present embodiment, and FIG. 2 is a block diagram showing a safety switch short circuit device used in the embodiment.

In these figures, reference numeral 1 denotes a transmitter having switching units 1a and 1b, 2 denotes an electromagnetic wave of a predetermined frequency output from the transmitter 1, and 3 denotes a receiver for receiving the electromagnetic wave 2. , The transmitter 1 includes a switching unit 1
When the switch a is pushed in to switch on, the electromagnetic wave 2 of 300 MHz is output. When the switch 1b is pushed in to switch on, the electromagnetic wave 2 of 350 MHz is output.
Can also be switched on at the same time.

On the other hand, when the receiver 3 detects the electromagnetic wave 2 of 300 MHz, it outputs a signal to the amplifier 3a, and when the electromagnetic wave 2 of 350 MHz is detected, outputs a signal to the amplifier 3b. A transistor Tra is connected to the amplifier 3a and the power supply N, and a collector is connected to the power supply P via the relay 3A. A base and an emitter are connected to the amplifier 3b and the power supply N, respectively, and the collector is connected via the relay 3B. The transistor Trb connected to the power supply P
A normally open contact 3Aa and a normally open contact 3Ba of relay 3B.
Are clip terminals 4a, 4b via terminals 3d, respectively.
Is connected.

A normally closed contact 5b and a normally closed contact 6b, which are safety switches for the elevator, are provided between the power supplies PN.
Is connected to a safety detection relay 7 having a normally open contact 7a and enabling the operation of the car only when energized, and the normally open contact 7a is connected to an elevator control circuit 8. The normally closed contact 5b is connected to the terminals 5b1 and 5b2, and the normally closed contact 6b is connected to the terminals 6b1 and 6b2. Next, a procedure for performing an operation check operation when the safety switch is activated using the transmitter 1 and the receiver 3 will be described.

First, an operator installs a receiver 3 near an unillustrated control panel in an elevator machine room, connects a power supply terminal of the receiver 3 to power supplies P and N, and connects a clip terminal 4a to a terminal. 5b1 and 5b2, and the clip terminal 4b is connected to the terminals 6b1 and 6b2. Next, after the normally closed contact 5b or the normally closed contact 6b is opened and the safety switch is set to the activated state, the operator enters the car and turns on the low-speed operation switch (not shown), and the car does not start. Check.

When the operator operates the car by releasing the operation stop command by the safety switch, the transmitter 1
Of one of the switching sections 1a and 1b of
Electromagnetic waves 2 at either megahertz or 350 megahertz
Output. Then, the electromagnetic wave discriminating device 3c of the receiver 3 that has detected the electromagnetic wave 2 outputs a signal to one of the amplifiers 3a and 3b , so that one of the transistors Tra and Trb is turned on, and P-3A is turned on. -Tra-N of any round of the relay circuit of the relay circuit or P-3B-Trb-N
The road is conducting state and a ing.

Thus , the relay 3A or the relay 3B
Are normally energized and the corresponding normally open contact 3Aa or normally open contact 3
Since Ba is closed formed, normally closed contact 5b had been released also
When one of the safety switches of normally closed contacts is short-circuited and the safety detection relay 7 is energized, the circuit of P-7a-8-N is activated.
Since the control circuit 8 is turned on and energized, the control circuit 8
, The car can be operated. That is, the operator of the passenger cage, the transmitter 1 of the switching unit 1a, 1b
If either were switched on, during which can be set to a state where the safety switch has canceled the operation stop instruction shorted, can drive the car ride by turning on the low-speed operation switch (not shown) .

According to the present embodiment, the switching unit 1a of the transmitter 1, nothing Re also is switched-on state of 1b
Maintained in a state when the safety switch operation to operation stop instruction is issued to be in the, and switching unit 1a, 1b any
Since either a can be set to a state in which it caused to scan Itchion operation by short-circuiting the safety switch stop command is released, the transmitter 1
It is possible to make official announcement and release the operation stop instruction by the safety switch by remote control from the operator is riding basket with a,
Therefore, even one operator can perform the operation check operation at the time of operating the safety switch without any trouble. In this embodiment, since the receiver 3 can remotely control the electromagnetic wave 2 having a predetermined frequency output from the transmitter 1 without using an interphone or the like of an elevator, a part of the intercom circuit can be opened or managed. It is not necessary to perform a complicated preparation work such as giving a description to a person or the like in advance, so that the work efficiency is improved, and the inspection work can be performed with confidence because there is no possibility of adversely affecting the existing elevator apparatus.

[0016]

As described above, according to the present invention, since the safety switch shorting device for an elevator according to the invention can cancel the operation stop instruction safety switch when the receiver receives is short electromagnetic waves of a predetermined frequency transmitter outputs The operator in the car with the transmitter can perform the operation check work by the remote control alone when the safety switch is activated, and does not use the existing equipment such as the intercom of the elevator. This eliminates the need for complicated and complicated preparation work, and provides an excellent effect that there is no possibility of adversely affecting existing elevator devices.

[Brief description of the drawings]

FIG. 1 is a circuit diagram illustrating a short circuit of a safety switch according to an embodiment.

FIG. 2 is a block diagram showing a safety switch short-circuit device used in the embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Transmitter 1a, 1b Switching part 2 Electromagnetic wave 3 Receiver 3c Electromagnetic wave discriminator 3A, 3B Relay 3Aa, 3Ba Normally open contact 3d Terminal 4a, 4b Clip terminal 5b, 6b Normally closed contact (safety switch) 5b1, 5b2, 6b1, 6b2 terminal 7 Safety detection relay 8 Elevator control circuit Tra, Trb transistor

Claims (1)

(57) [Claims] 1. An opening operation is performed when an abnormality of an elevator is detected .
That of multiple consisting of a normally closed contact safety switch is in elevator
When an abnormality is detected, configured to stop the operation of the car-ride
In the elevator safety switch short-circuiting device used to check the operation status of the elevator when the abnormality is detected, the operation of each of the plurality of switching units is performed.
A transmitter for outputting an electromagnetic wave of predetermined different frequencies corresponding, receiving electromagnetic waves before Symbol predetermined frequency from the transmitter
, The closing operation according to the different predetermined frequency
And a plurality of normally open contacts that
The parallel connection between the normally closed contact and the
Safety switch shorting device for an elevator, characterized in that it consists of a receiver having a plurality of sets of connection terminals of the fit.