JP2775310B2 - Anomaly detection device for building shutter - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation abnormality detection device for a building shutter for detecting an operation abnormality in a building shutter, particularly an electric shutter.

[Prior Art] In an electric shutter for buildings that opens and closes unattended, when a shutter curtain comes into contact with an obstacle during closing operation of the shutter, an abnormality is detected and the lowering of the shutter curtain is stopped. Alternatively, there is one that is raised after stopping.

Conventionally, such an operation abnormality of the shutter is detected by contact provided on the lower surface of a seat plate of a shutter curtain.
A seat plate switch that is turned on and off, an optical transmitter that is provided on the seat plate and emits light with a predetermined pulse width when the seat plate switch is turned on, and receives a pulse light from the optical transmitter that is provided on the building side. There is an abnormality detection device including a receiver.

In the abnormality detection device, when the seat plate switch contacts an obstacle, the optical transmitter is activated, and pulse light is emitted from the seat plate side to the receiver provided on the shutter body side, and the receiver emits the pulse light. When the signal is received and input as an electric signal to the open / close drive control unit, the open / close drive control unit stops driving the motor or reversely rotates the motor.

[Problems to be Solved by the Invention] However, the above-described conventional abnormality detection device has the following problems.

The optical transmitter must include a xenon lamp / xenon lamp light emitting circuit, a light emitting power source such as a battery,
The shape of the optical transmitter must be large, and the appearance is poor. Since it is an electronic product, it may be damaged. In places exposed to the weather, it is expensive because it must be waterproofed. The battery must be checked or replaced at an appropriate time, such as whether the battery has reached the end of its life or not discharged.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a building shutter operation abnormality detecting device which has a simple structure, does not impair the appearance of the shutter, and has good maintenance.

Means for Solving the Problems The present invention relates to a building shutter in which the shutter is opened and closed by an electric motor, which has an ultrasonic sensor on the building side and a reflecting plate on the shutter curtain side, respectively. A measuring unit that receives the ultrasonic wave emitted from the acoustic wave sensor and reflected by the reflector and measures the amount of movement of the shutter curtain, and a determining unit that determines whether the measurement result follows the drive of the electric motor. It is characterized by having.

[Operation] When the shutter curtain is moving following the motor drive in a state where the shutter is opened and closed by the driving of the motor, it is determined that the shutter curtain is normal, and the shutter curtain moves following the driving of the motor. If not, it is determined that there is an abnormality.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

In this embodiment, the present invention is embodied in a panel shutter in which a shutter curtain is formed by connecting panels to be freely opened and closed by a chain for opening and closing.

The panel 1 of the panel shutter curtain 25 is engaged with the opening / closing chain 2 at both width ends, and is moved up and down through the opening / closing chain 2. The opening / closing chain 2 meshes with a sprocket 8 provided above a guide rail 11, and the sprocket 8 is rotated by a motor 3 via a sprocket 4, a chain 5, a sprocket 6, and a chain 7, and the opening / closing chain 2 is rotated. Is raised and lowered. Further, the pulled-up panel 1 moves onto the storage rail 9 and is stored sequentially.

A reflecting plate 10 having a horizontal reflecting surface 10a is fixed to the width end face of the panel 1a at the lowermost position. Above the guide rail 11,
An ultrasonic sensor 12 is provided on a vertical line passing through the reflection surface 10a.

The signal from the ultrasonic sensor 13 is input to a control device 13 described later, and the control device 13 controls the driving of the motor 3.

 In FIG. 2, reference numeral 14 denotes a guide roller, and 15 denotes a seat plate.

The control device 13 is, as shown in FIG.
6, comparison amplifier 17, arithmetic unit 18, driver 19, signal processor 2
0, a function generator 21 is provided. When a signal corresponding to the rotation amount of the motor 3 is input, the function generator 21 outputs a signal corresponding to the movement amount of the opening / closing chain 2. I have.

 Reference numeral 22 denotes an encoder provided on the motor 3.

While the motor 3 is driven and the shutter is performing the opening and closing operation, an ultrasonic wave is emitted from the ultrasonic sensor 12 to the reflection plate 10 at required time intervals, for example, at every 0.1 sec or 1 sec. Ultrasonic sensor detects the reflected wave reflected by reflector 10
12 receive. The ultrasonic sensor 12 converts the reception of the reflected wave into an electric signal and inputs the electric signal to the length measuring device 16. The length measuring device 16 measures the time from emission to reception, calculates the position of the reflector 10 at a certain point in time, and inputs the result to the comparison amplifier 17.

The encoder 22 inputs the rotation angle of the motor 3 to the signal processor 20 as a pulse signal. The signal processor 20 integrates the pulse signals, obtains the total amount of rotation of the motor 3 from the start of the opening / closing operation of the shutter to the above-described certain point, and inputs the amount to the function generator 21.

The function generator 21 inputs to the comparison amplifier 17 a signal corresponding to the amount of movement of the opening / closing chain 2, that is, the distance between the ultrasonic sensor 12 and the reflection plate 10.

The comparison amplifier 17 performs a comparison operation between the signal from the length measuring device 16 and the signal from the function generator 21.

If the result of the comparison operation is 0 or within the range of a predetermined value, the arithmetic unit 18 determines that the shutter is normally opened and closed by driving the motor 3, and the driving of the motor 3 is continued, and the opening and closing operation is continued. Continued.

However, if the lowermost panel 1a comes into contact with an obstacle and stops, the signal from the length measuring device 16 does not change,
On the other hand, the signal from the function generator 21 continues to increase. Thus,
When the deviation between the signal from the length measuring device 16 and the signal from the function generator 21 exceeds the set value, the computing unit 18 judges that the operation is abnormal, and issues a stop signal to the drive unit 19 to stop the motor 3. Let it. Further, if necessary, the motor 3 is rotated in the reverse direction, and the shutter curtain 25 is raised by a required distance.

FIG. 4 shows another embodiment, in which a function generator 2 is used.
1, in which the encoder 22 is omitted.

The signal from the measuring device 16 is input to the comparison amplifier 17 and also input to the comparison amplifier 17 via the delay unit 23.

The comparison amplifier 17 determines whether or not the measurement result of the measuring device 16 has changed after the required time has elapsed based on the signal from the measuring device 16 and the signal from the delay device 23. Is output to the AND gate 24. The drive command signal of the motor 3 is also input to the AND gate 24. When there is a change in the measurement result while the motor 3 is driven, there is an output from the AND gate 24, and the arithmetic unit 18 determines that the operation is normal. Then, the opening and closing operation is continued.

When there is an abnormality in the operation, there is no change, and there is no output from the comparison amplifier 17, and therefore there is no output from the AND gate 24. Thus, the arithmetic unit 18 determines that the operation is abnormal and stops driving the motor 3.

In the above embodiment, the present invention is applied to a panel shutter. However, it goes without saying that the present invention can be applied to a shutter other than the panel shutter.

[Effects of the Invention] As described above, according to the present invention, the following excellent effects are exhibited.

(I) Since only a reflection plate needs to be provided on the shutter curtain side, the space required for mounting may be extremely small, and mounting conditions are relaxed.

(Ii) Since the reflection plate may be small, it is not noticeable and does not impair the appearance.

(Iii) Since it is sufficient to use only a metal fitting or a molded product, there is no failure, the reliability is improved, and no maintenance is required.

(Iv) Since the medium for measuring the length is ultrasonic waves, the alignment of the sound axis is easy and the assembly is easy.

(V) Since the movement of the shutter curtain itself is detected, not only when an obstacle is hit, but also an abnormal operation of the shutter itself is detected.

[Brief description of the drawings]

FIG. 1 is an overall explanatory view showing one embodiment of the present invention, FIG. 2 is a perspective view showing a main part of the embodiment, FIG. 3 is a block diagram of the embodiment, and FIG. 4 is another embodiment. It is a block diagram of. 1 is a panel, 3 is a motor, 10 is a reflector, 12 is an ultrasonic sensor, 13 is a control device, and 25 is a shutter curtain.

Claims (1)

(57) [Claims] 1. A building shutter in which a shutter is opened and closed by an electric motor. The building shutter has an ultrasonic sensor on the building side and a reflecting plate on the shutter curtain side, and the reflecting plate emits light from the ultrasonic sensor. A measuring unit for receiving the ultrasonic wave reflected by the measuring unit and measuring a moving amount of the shutter curtain, and a judging unit for judging whether or not the measurement result follows the driving of the electric motor. An abnormal operation detection device for building shutters.