JP2011058501A - Safety device of ceiling fan - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a safety device of a ceiling fan, surely detecting wear and deformation of a flange and a mounting bracket, breakage of a pipe, etc. caused by fluctuations of torque in a rotation direction and by vibration during rotation. <P>SOLUTION: The safety device of the ceiling fan includes a control section 5 built in a ceiling fan body 4 and a vertical acceleration sensor 14 provided in the control section 5 and detects the abnormal acceleration of the body 4. The safety device is thus obtained by detecting abnormality such as wear and deformation of the flange 3a and the mounting bracket 2 and breakage of the pipe 3 from output of the vertical acceleration sensor 14 and by stopping operation of the body 4. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a safety device for a ceiling fan used in a general home or office.

  Conventionally, a safety device for this type of ceiling fan is known in which the possibility of falling is detected by a microswitch fixed to a support of the ceiling fan (see, for example, Patent Document 1).

Japanese Patent No. 3032325 ([0007] to [0015], FIG. 1)

  In such a conventional ceiling fan safety device, the mounting bracket attached to the ceiling surface may be worn or deformed by contact with the flange at the upper end of the pipe due to fluctuations in torque in the rotational direction or vibration during rotation. In addition, deformation and breakage of the pipe itself may occur, but there is a problem that such a change cannot be detected, and it is required that an abnormal state such as deformation occurring below the mounting bracket can be reliably detected.

  The present invention solves such a conventional problem, and not only the looseness of the wood screw fixing the mounting bracket to the ceiling surface, but also the wear and deformation of the flange and the mounting bracket, the damage of the pipe, etc. are ensured. It aims at providing the safety device of a ceiling fan which can detect and stop operation.

  In order to achieve the above object, the ceiling fan safety device of the present invention has a vertical acceleration sensor for detecting vertical acceleration provided in the control unit, and this vertical acceleration sensor detects abnormal acceleration of the main body. At this time, the control unit stops energization of the motor.

  Further, the other means includes a vertical acceleration sensor for detecting vertical acceleration provided in the control unit and a horizontal acceleration sensor for detecting horizontal acceleration, and the vertical acceleration sensor or the horizontal acceleration sensor is connected to the main body. When detecting an abnormal acceleration, the control unit stops energization of the motor.

  Further, the other means has a rotation detection means for detecting the rotation of the motor provided in the control section, and when the rotation detection means detects an abnormal stop of the motor rotation, the control section Is to stop.

  In addition, the other means has a Hall IC provided in the control unit and a magnetic body attached to the motor as the rotation detecting means.

  By these means, it is possible to obtain a safety device for a ceiling fan that can reliably detect an abnormal state due to the inclination of the main body due to wear or deformation of the flange or the mounting bracket or the damage or deformation of the pipe and stop the operation.

  According to the present invention, the acceleration due to the vertical impact is detected by the acceleration sensor, so that not only the impact such as an earthquake is directly detected and the operation is stopped, but also the screw of the wood screw fixed to the ceiling surface or the ceiling surface is removed. It is possible to provide a safety device for a ceiling fan that is capable of reliably detecting a fall due to breakage and stopping operation.

  In addition, by detecting the horizontal acceleration caused by the horizontal shaking of the main body by the acceleration sensor that detects the horizontal acceleration, it is possible to detect abnormal vibration due to blade imbalance and stop the operation Can provide a safety device for ceiling fans.

  In addition, it is possible to provide a ceiling fan safety device that has an effect of stopping energization of the motor, such as when the rotation is stopped when the blade hits an obstacle by the rotation detecting means for detecting the rotation of the motor.

  In addition, the combination of the Hall IC and the magnetic body attached to the motor can detect the number of rotations of the motor, so the ceiling fan has the effect of detecting not only abnormal rotation of the blades due to external obstacles but also abnormalities in the motor itself. Can provide safety devices.

Sectional drawing of the ceiling fan of the reference example 1 of this invention Sectional drawing of the ceiling fan of the reference example 2 of this invention Sectional drawing of the ceiling fan of Embodiment 1 of this invention Sectional drawing of the ceiling fan of Embodiment 2 of this invention Sectional drawing of the ceiling fan of Embodiment 3 of this invention

  The invention according to claim 1 of the present invention has a vertical acceleration sensor for detecting vertical acceleration provided in the control unit, and this vertical acceleration sensor generates a large output voltage in proportion to the received acceleration. Therefore, the control unit has an action of stopping energization of the motor when detecting a large output voltage corresponding to an abnormal acceleration due to an earthquake or dropping of the main body.

  In addition, the control unit includes a vertical acceleration sensor that detects vertical acceleration and a horizontal acceleration sensor that detects horizontal acceleration. These two acceleration sensors have a voltage proportional to the received acceleration. If the blades are out of balance such that they cannot be detected by the vertical acceleration sensor, or if an abnormal external force is applied, the body itself will shake in the circumferential direction. A voltage signal is output from the horizontal acceleration sensor, and the control unit has an action of stopping energization of the motor when the voltage exceeds a specified value.

  Also, it has a rotation detection means for detecting the rotation of the motor provided in the control unit, and this rotation detection means is designed to output a voltage proportional to the rotation speed, and when the blade hits an obstacle In addition, when the main body is tilted to prevent rotation, no voltage is output from the rotation detecting means, and the control unit has an action of detecting this and stopping energization of the motor.

  The rotation detection means is composed of a Hall IC provided in the control unit and a magnetic body attached to the motor. When the magnetic body passes near the Hall IC, a pulse is output from the Hall IC. When the blade hits an obstacle and rotation is prevented, the magnetic body remains stopped and no pulse is output from the Hall IC, and the control unit detects this and stops the energization of the motor. Have

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Reference Example 1)
As shown in FIG. 1, the mounting plate 1 is fixed to the ceiling surface with wood screws, and the mounting bracket 2 having an opening on the bottom surface and an inclined surface around the opening is fixed to the mounting plate 1 with screws. Yes. The pipe 3 is provided with a flange 3a at the upper end, and a main body 4 is fixed to the lower portion with screws. A control unit 5 is built in the main body 4, and a tilt sensor 6 is mounted on the control unit 5. A shaft 7 is fixed to the pipe 3 with a screw, and the shaft 7 supports a motor 9 via a press-fit bearing 8. A blade 10 is fixed to the motor 9 with screws. The flange 3a provided on the pipe 3 is supported in a pressure contact state on the inclined surface of the lower part of the mounting bracket 2, whereby the main body 4 is suspended from the ceiling surface.

  In the above configuration, the tilt sensor 6 is configured such that the output voltage changes in proportion to the tilt angle of the main body 4, and the tilt angle is set within about 5 degrees in a normal installation state.

  The wood screw fixing the mounting plate 1 to the ceiling surface is loosened or the mounting plate 1 and the mounting bracket 2 are fixed due to fluctuations in torque in the rotational direction due to repeated operation and stop of the main body 4 and vibration during rotation. If the pipe 3 itself is further deformed due to unscrewing, or due to wear or deformation of the flange 3a at the upper end of the pipe 3 and the opening of the mounting bracket 2, the main body 4 is greatly inclined and the inclination angle is 5 degrees or more. Thus, a voltage proportional to the inclination is output from the inclination sensor 6. Based on the signal from the tilt sensor 6, the control unit 5 informs the danger by energizing an alarm device (not shown), and stops energization when the motor 9 is energized, Stop the rotation of the blade 10.

  The same applies to the case where the flange 3a provided on the pipe 3 is not properly suspended from the inclined surface of the lower part of the mounting bracket 2 and is installed at an angle of 5 degrees or more. The danger can be notified.

(Reference Example 2)
As shown in FIG. 2, the main body 4 of the ceiling fan includes a control unit 5, a reflective photo interrupter 11 is mounted on the control unit 5, and a slit 12 is cut in the upper main body 4 of the reflective photo interrupter 11. On the slit 12, a reflecting plate 13 for reflecting infrared rays emitted from the reflective photo interrupter 11 is fixed to the ceiling surface.

  In the above configuration, when the main body 4 is in a normal state, the infrared light emitted from the reflective photo interrupter 11 is reflected by the reflecting plate 13 and returns to the reflective photo interrupter 11 again, and the control unit 5 determines that it is in a normal state. .

  Due to fluctuations in torque in the rotational direction due to repeated operation and stop of the motor 9 and vibration during rotation, the wood screws securing the mounting plate 1 to the ceiling surface are loosened, or the mounting plate 1 and the mounting bracket 2 are fixed. The screw may come off. Further, since the flange 3a at the upper end of the pipe 3 and the opening of the mounting bracket 2 are in contact with each other, wear or deformation may occur, or the pipe 3 itself may be damaged or deformed. In such a case, the main body 4 is inclined more than the angle normally assumed, and the infrared rays emitted from the reflective photo interrupter 11 are reflected in different directions by the reflecting plate 13 or do not hit the reflecting plate 13. It does not return to the reflection type photo interrupter 11. When the control unit 5 determines that the reflection photo interrupter 11 cannot detect infrared rays, the control unit 5 determines that there is an abnormality and energizes an alarm device (not shown) to notify the danger, and when the motor 9 is energized. Stops the rotation of the blade 10 by stopping energization.

  Furthermore, since the distance from the reflecting plate 13 can be measured by changing the emission intensity of the infrared light output from the reflective photointerrupter 11, even if the main body 4 falls off without being tilted vertically, the control unit 5 can detect a change in the distance to the reflecting plate 13 to notify the danger, and can stop the energization of the motor 9.

(Embodiment 1)
As shown in FIG. 3, the main body 4 of the ceiling fan has a control unit 5 built in, and the control unit 5 is equipped with a vertical acceleration sensor 14 for detecting acceleration applied in the vertical direction, and the vertical acceleration sensor 14 receives the received acceleration. A voltage proportional to is output.

  In the above configuration, when the main body 4 receives an impact in the vertical direction due to an earthquake or external force, the rotary vertical acceleration sensor 14 outputs a voltage proportional to the impact. When the output voltage from the vertical acceleration sensor 14 exceeds a specified value, the control unit 5 notifies the danger by energizing an alarm device (not shown), and when the motor 9 is energized. By stopping energization, the rotation of the blade 10 is stopped.

  Further, in the case of continuous impacts less than the specified value, the detection time is compared with the specified time, and the control unit 5 turns on the motor 9 from the data of both the output voltage from the vertical acceleration sensor 14 and the detection time. Can be stopped.

(Embodiment 2)
As shown in FIG. 4, the main body 4 of the ceiling fan includes a control unit 5. The control unit 5 includes a vertical acceleration sensor 14 that detects acceleration applied in the vertical direction and a horizontal acceleration that detects acceleration applied in the horizontal direction. A sensor 15 is mounted, and these two acceleration sensors output a voltage proportional to the received acceleration.

  In the above configuration, when the main body 4 receives an impact in the vertical direction due to an earthquake or an external force, the vertical acceleration sensor 14 outputs a voltage proportional to the impact. When the voltage from the vertical acceleration sensor 14 exceeds a specified value, the control unit 5 notifies the danger by energizing an alarm device (not shown), and energizes the motor 9 if energized. By stopping the rotation of the blade 10.

  Further, the horizontal acceleration sensor 15 outputs a voltage proportional to the acceleration due to abnormal horizontal vibration or shaking of the main body 4 due to loosening of the screws fixing the blades 10 to the motor 9. When the voltage output from the horizontal acceleration sensor 15 exceeds a specified value, the control unit 5 notifies the danger by energizing an alarm device (not shown) and stops energizing the motor 9. Can do.

  By mounting the vertical acceleration sensor 14 and the horizontal acceleration sensor 15 on the control unit 5 in this way, it is possible to safely stop the operation against any one of the vertical and horizontal impacts received by the main body 4. it can.

  In the above, two acceleration sensors are used to detect vertical and horizontal accelerations. However, one sensor that simultaneously detects accelerations in three directions (x, y, z directions) perpendicular to each other is used. However, similar effects can be obtained.

(Embodiment 3)
As shown in FIG. 5, the control unit 5 is built in the main body 4 of the ceiling fan, and the control unit 5 is equipped with a Hall IC 17 that detects the rotation of the motor 9 as a rotation detecting means. The magnetic body 18 is fixed so as to face each other. When the blades 10 are rotating normally, the magnetic body 18 fixed to the motor 9 periodically passes under the Hall IC 17 so that a pulse signal is periodically output from the Hall IC 17. It has become.

  In the above configuration, when the blade 10 hits an obstacle during the operation of the main body 4 and the rotation is prevented, the magnetic body remains stopped, and the pulse signal from the Hall IC 17 is not output. The controller 5 determines that the signal from the Hall IC 17 is abnormal, energizes an alarm device (not shown) to notify the danger, and stops the rotation of the blade 10 by stopping the energization of the motor 9.

  In addition, when the main body 4 is inclined and the rotation of the blades 10 is hindered on the ceiling surface, or when the motor 9 stops rotating due to a failure of the motor 9 itself, the controller 5 determines that it is abnormal, By energizing an alarm device (not shown), the danger can be notified and the energization to the motor 9 can be stopped.

  An abnormality can be easily detected by using a sensor that detects the tilt and vibration of the main body and the rotation of the motor in the control unit, and can be applied to a ceiling fan installed in a general home or office.

1 Mounting plate (support)
2 Mounting bracket (support)
DESCRIPTION OF SYMBOLS 3 Pipe 3a Flange 4 Main body 5 Control part 6 Inclination sensor 7 Shaft 9 Motor 11 Reflection type photo interrupter 13 Reflector 14 Vertical acceleration sensor 15 Horizontal acceleration sensor 17 Hall IC (rotation detection means)
18 Magnetic material (Rotation detection means)

Claims (4)

A shaft that vertically penetrates the center of the ceiling fan main body, a pipe fixed to the upper portion of the shaft, a flange provided at the upper end of the pipe, and a support that engages with the flange and suspends the main body, A motor supported on the shaft; a control unit built in the main body; and a vertical acceleration sensor for detecting a vertical acceleration provided in the control unit. When the acceleration is detected, the control unit stops the energization of the motor, and controls the ceiling fan. A shaft that vertically penetrates the center of the ceiling fan main body, a pipe fixed to the upper portion of the shaft, a flange provided at the upper end of the pipe, and a support that engages with the flange and suspends the main body, A motor supported by the shaft, a control unit built in the main body, a vertical acceleration sensor for detecting vertical acceleration provided in the control unit, and a horizontal acceleration sensor for detecting horizontal acceleration are provided. When the vertical acceleration sensor or horizontal acceleration sensor detects an abnormal acceleration of the main body, the control unit stops the energization of the motor. A shaft that vertically penetrates the center of the ceiling fan main body, a pipe fixed to the upper portion of the shaft, a flange provided at the upper end of the pipe, and a support that engages with the flange and suspends the main body, A motor supported on the shaft; a control unit built in the main body; and a rotation detection unit that detects rotation of the motor provided in the control unit. The control device for a ceiling fan, wherein when the stop is detected, the control unit stops energization of the motor. The control device for a ceiling fan according to claim 2, wherein the rotation detecting means comprises a Hall IC provided in the control unit and a magnetic body attached to the motor.

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