JPH0240060Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an improvement of an abnormality detection device for an elevator door device.

<Prior art> When an elevator door is opened or closed, for example, if the sill groove of the door becomes clogged with dirt or the door device itself becomes mechanically stiff, and the door is restrained, a restraining current is generated in the door motor, etc. This causes the temperature of the door motor, resistor, etc. to rise, and there is a risk that these may burn out. Conventionally, as a method of protecting this, for example, as shown in Japanese Utility Model Application Publication No. 52-93163, the motor current is integrated over time, and when the result exceeds a predetermined value, the door is reversed. It is also known to mechanically detect overload and reverse the door.

<Problem to be solved by the invention> By the way, there is no problem when the conventional devices mentioned above are adopted in a new elevator, but when these devices are adopted in an existing elevator, a major modification of the door device is required. As a result, the work costs are extremely high, and the elevator outage period is prolonged due to this work, which is inconvenient to the users.

Therefore, the present invention was devised to solve the above-mentioned inconveniences, and its purpose is to be able to easily detect abnormal phenomena when doors are opened and closed, and to be able to be easily installed in existing elevators. An object of the present invention is to provide an abnormality detection device for an elevator door device.

<Means for solving the problem> In order to achieve the above purpose, the present invention has the following features:
In an abnormality detection device for an elevator door device, which includes a door opening/closing motor on an elevator car, and a resistance board housing a resistor provided for controlling the speed of the motor, the temperature is detected in the resistance board. A temperature detection body is provided which emits an output signal corresponding to the detected temperature, and a reference signal generator which emits a reference signal corresponding to a preset reference temperature compares the output signal with the reference signal, The present invention is configured to include a comparison means that issues a signal when the signal exceeds the reference signal, and an alarm device that responds to the signal from the comparison means.

<Function> Since the present invention has the above configuration, it can be easily installed without modifying the door device, and with a simple configuration, it is possible to accurately detect abnormal phenomena of the door device. It is possible to realize an abnormality detection device for an elevator door device that is inexpensive and can be installed in an existing elevator in a short period of time.

<Example> The present invention will be described below based on an illustrated example.

Fig. 1 is a block circuit diagram showing the door abnormality detection circuit according to the present invention. In the figure, 1 is a temperature sensor configured to output a voltage value corresponding to the detected temperature using a thermistor, etc., and 2 is a voltage sensor. This is a frequency converter that converts a value into a corresponding frequency, and is connected to the temperature sensing body 1. 3 is a reference frequency generator that emits a reference frequency corresponding to a preset abnormal temperature; 4 is connected to the frequency converter 2 and the reference frequency generator 3; This is a comparator that compares the above-mentioned frequency with a reference frequency and generates an output signal when the above-mentioned frequency exceeds the reference frequency. Reference numeral 5 denotes an alarm device which is activated by the output signal from the comparator 4 and is disposed in a control panel provided in an elevator machine room or the like.

Fig. 2 is a schematic diagram showing the arrangement of equipment installed on the elevator car. In the figure, 8 indicates the elevator car, and above the car 8 is a resistance panel containing resistors to be described later. 6 is provided, and the above-mentioned temperature sensor 1 is mounted inside this resistance board 6. 7 is a collection board in which the frequency converter 2, reference frequency generator 3, and comparator 4 described above are housed;
9 is a door motor for opening and closing the elevator door (not shown).

FIG. 3 is a schematic diagram of a door control circuit composed of a DC motor. In the figure, A indicates the armature of the door motor 9 mentioned above, and B and C indicate the armatures housed in the resistance panel 6 mentioned above. A is a resistor for controlling the rotational speed, and D and E are contacts for commanding door opening/closing to open and close the elevator door, which respectively determine the rotational direction of the armature A.

The operation of the embodiment of the present invention with the above configuration will be explained. Now, for example, if the above-mentioned E is used as a door-opening command contact, when this door-opening command contact E is closed and current flows through armature A, the above-mentioned elevator door is locked for some reason. In the case where the armature A is not rotated, the restraint current continues to flow, and the resistor B is abnormally heated by the restraint current. Then, the temperature inside the resistance board 6 rises abnormally, and this temperature rise is sensed by the temperature detector 1, and a voltage value corresponding to this is output. This voltage value is converted into a corresponding frequency by a connected frequency converter 2 and output to a comparator 4. The comparator 4 compares the reference frequency output from the reference frequency generator 3 with the frequency output from the frequency converter 2, and determines whether the frequency output from the frequency converter 2 exceeds the reference frequency. When,
That is, in other words, when the temperature inside the resistance panel 6 becomes abnormally high, the comparator 4 outputs an alarm signal that activates the alarm device 5. When an abnormality occurs in the elevator, the manager can easily know that there is an abnormality in the elevator door through the alarm device 5 disposed on the control panel of the elevator machine room.

If such failures occur sporadically and the phenomenon disappears automatically, the cause of the failure cannot be ascertained and the failures occur repeatedly. Therefore, the alarm signal is processed by a microcomputer and stored in memory to record the history. By retaining the history and reading out the history every time the elevator is inspected, it is possible to know the cause of failure related to the elevator door, and take appropriate measures.

Since this embodiment has the above-described configuration, it can be easily installed without modifying the door device, and in particular, in existing elevators, the period when the elevator is stopped for installation can be shortened. This eliminates the inconvenience to elevator users. Further, abnormal phenomena of the door can be accurately detected with a simple configuration, and this type of device can be made inexpensive.

<Effects of the invention> As explained above, according to the invention, an inexpensive device that can be easily installed without modifying the door device, has a simple configuration, and can accurately capture the phenomenon of the door device. This has the effect of realizing an abnormality detection device for an elevator door device that can be installed in a short construction period.

[Brief explanation of the drawing]

The present invention is a block circuit diagram of a door abnormality detection circuit according to the present invention, and Fig. 2 is a schematic diagram of an elevator car.
FIG. 3 is a schematic diagram of the door control circuit. 1...Temperature sensing object, 2...Frequency converter, 3...
... Reference frequency generator, 4 ... Comparator, 5 ... Alarm device, 6 ... Resistance panel, 7 ... Collection panel, 8 ... Elevator car, 9 ... Door motor, A ... Armature,
B, C...Resistor, D, E...Contact for door opening/closing command.

Claims (1)

[Scope of Claim for Utility Model Registration] An abnormality detection device for an elevator door device, which is equipped with a door opening/closing motor on an elevator car, and a resistance panel housing a resistor provided to control the speed of the motor. , a temperature detection element that emits an output signal corresponding to the detected temperature is disposed in the resistance board, a reference signal generator that emits a reference signal corresponding to a preset reference temperature, and a reference signal generator that emits a reference signal corresponding to a preset reference temperature; abnormality detection for an elevator door device, characterized in that it is provided with a comparison means for comparing the output signal and emitting a signal when the output signal exceeds the reference signal, and an alarm device responding to the signal from the comparison means. Device.