JP5338882B2 - Ceiling fan - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ceiling fan that can automatically detect a phenomenon that a coupling rod or a through-hole gradually becomes worn, and can safely stop its operation when a female thread that is screwed in the coupling rod through a shaft and pipe is not fixed. <P>SOLUTION: The ceiling fan includes: a shaft 3 protruding upward a motor 2 for rotating a blade 1; the pipe 5 that is connected with an upper end of the shaft 3 and is hung on a ceiling face 4; the coupling rod 6 connected with the pipe 5 via the through-hole 12 provided on the shaft 3; a displacement accommodating device 7 for detecting a relative displacement Y between the shaft 3 and the pipe 5; a power source control device 8 for controlling power distribution to the motor 2 in accordance with the displacement Y of the displacement accommodating device 7; and a control part 17 for receiving a detection value as an electric signal from the displacement accommodating device 7. The control part 17 controls or stops the power distribution to the motor 2 via the power source device 8 when the detection value exceeds a threshold, can thereby prevent deterioration of the wear of the coupling rod and the risk of falling of the ceiling fan. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

  The present invention relates to a ceiling fan that is held in the air by connecting a shaft protruding from the top of a motor that rotates a blade to a pipe suspended from a ceiling surface.

  2. Description of the Related Art Conventionally, as an example of this type of ceiling fan, there is known a ceiling fan that notifies an alarm device when a mounting screw is loosened (see, for example, Patent Document 1).

  Hereinafter, the ceiling fan will be described with reference to FIG.

  As shown in the figure, a pipe 101 penetrating through the center of the ceiling fan is suspended from a mounting bracket 103 via a hemispherical flange 102, and the mounting bracket 103 is coupled to a mounting plate 105 mounted on a ceiling surface with a wood screw 104. The mounting bracket 103 is provided with a micro switch 107, and the actuator 108 of the micro switch 107 is in contact with the ceiling surface.

Japanese Patent No. 3032325 ([0010], [0011], FIG. 1)

  In such a conventional ceiling fan, when the wood screw 104 to which the mounting plate 105 is attached or the coupling screw 106 for attaching the mounting bracket 103 to the mounting plate 105 is loosened, the alarm device or the like is operated via the micro switch 107. When the ceiling fan structure connects the shaft (not shown) provided on the motor side and the pipe 101 suspended from the ceiling, the shaft and the pipe 101 are sufficiently connected. When it is not fixed by screwing, there is a problem that the strength of holding the ceiling fan is insufficient due to repeated stoppage of motor operation or gear shifting, resulting in an unsafe hanging state.

  The present invention solves such a conventional problem, and automatically detects the progress of wear due to long-term operation when the shaft and the pipe are not sufficiently screwed and fixed. An object of the present invention is to provide a ceiling fan that can be used with safety ensured by stopping or slowing down.

In order to achieve the above object, the ceiling fan of the present invention has a motor that rotates a plurality of blades attached in the horizontal direction, a shaft that protrudes above the motor, and an upper end of the shaft that is connected to the ceiling surface. A pipe for suspending, a connecting rod connected through a through-hole provided in each of the pipe and the shaft, a female thread portion screwed into the connecting rod, and a relative positional displacement between the shaft and the pipe A displacement response tool for detecting a displacement amount corresponding to the amount, and a power supply control tool for controlling energization to the motor according to the displacement amount detected by the displacement response tool. a control unit for receiving the detected value as an electric signal, and when the control unit is the detection value exceeds the threshold, Ri Na controls or stops the power supply to the motor through the power control element, The displacement response tool , And can be separated into the shaft-side displacement corresponding tool and pipe side displacement corresponding device, when connecting the said pipe shaft, in which a structure to be connected at the same time as a pair of the displacement corresponding tool.

  Another means is that a threshold adjustment unit is provided on the input side of the control unit so that the threshold can be adjusted.

  The other means is to provide a magnet as a pipe-side displacement support tool, and to provide a magnetic detection tool as a shaft-side displacement support tool, and when the detected value of the magnetic detection tool falls below a threshold value, the control unit Is stopped or the rotational speed is reduced.

  In addition, another means is provided with a reflector as a pipe-side displacement support tool, and an infrared light-emitting unit and an infrared light-receiving unit connected to the control unit as a shaft-side displacement support tool. When the value is less than or equal to the value, the control unit stops the motor or reduces the rotation speed.

  The other means has a notifying means for notifying abnormality when the motor is stopped or the number of rotations is reduced, and this notifying means is provided close to the displacement handling tool.

  By these means, when the female thread part is not sufficiently tightened and fixed to the connecting rod that penetrates the shaft and the pipe, the progress of wear of the connecting rod or the through hole due to long-term operation is automatically detected, By stopping or decelerating the operation immediately, a ceiling fan that can be used while ensuring safety can be obtained.

According to the present invention, a motor for rotating a plurality of blades attached in the horizontal direction, a shaft projecting from the top of the motor, a pipe connected to the upper end of the shaft and suspended from the ceiling surface, and the pipe And a connecting rod connected through a through hole provided in each of the shafts, a female thread portion screwed into the connecting rod, and a relative displacement amount of the shaft and the pipe is detected. And a control unit that receives a detected value from the displacement support tool as an electrical signal. The control unit includes a power supply control tool that controls energization to the motor in accordance with a displacement amount detected by the displacement support tool. has, the control section when the detected value exceeds the threshold, Ri Na controls or stops the power supply to the motor through the power supply control device, the displacement corresponding device, the shaft-side displacement Correspondence tool and pipe Displacement corresponding device and allows the separation and, when connecting the said pipe shaft, with the construction which is simultaneously connected as a pair of the displacement corresponding device, when the female screw portion is not rigidly fixed to the connecting rod In addition, when the motor is stopped or shifted repeatedly, shaft torque due to the rotational force of the motor is applied to the connecting portion of the shaft and the pipe, and the connecting rod or through hole gradually wears out, making it unsafe. The operation of the ceiling fan can be controlled according to the amount of positional displacement with the displacement corresponding tool corresponding to the amount of displacement relative to the pipe, so if the shaft and pipe are displaced, the motor is stopped or controlled. by prevent progression of wear of the connecting portion, since it is simultaneously connected as a pair of displacement corresponding device, it is possible to prevent attachment forgetting displacement corresponding device, placed When the pipe and the shaft are not properly connected due to a mounting error, etc., the power supply control tool controls the power supply to the motor in response to the relative displacement of the shaft and the pipe. The use of the ceiling fan in an unsafe state can be prevented, and the ceiling fan can be safely suspended.

  In addition, a threshold adjustment unit is provided on the input side of the control unit so that the threshold can be adjusted, so that the threshold value can be adjusted at the construction site when the pipe and shaft are connected. This makes it possible to set a threshold value corresponding to the detected value of the displacement support tool using the adjustment part of the operation unit without fine adjustment of the displacement support tool, No complicated adjustment work for fine adjustment is required, and construction work for ensuring safety can be easily performed.

  In addition, a magnet is provided as a pipe-side displacement support tool, a magnetic detection tool is provided as a shaft-side displacement support tool, and the control unit stops or rotates the motor when the detected value of the magnetic detection tool is equal to or less than a threshold value. If the connecting rod or through-hole wears down and the detected value of the magnetic detection tool falls below the threshold during operation, the controller stops energizing the motor or reduces the number of revolutions. Thus, the progress of wear of the connecting portion can be prevented, and safety can be ensured.

  In addition, a reflection plate is provided as a pipe-side displacement support tool, and an infrared light-emitting unit and an infrared light-receiving unit connected to the control unit are provided as a shaft-side displacement support tool. The control unit stops the motor or reduces the number of rotations, so that when the shaft is displaced downward relative to the pipe, the detection value of the infrared light receiving unit greatly decreases below the threshold value. The controller can ensure safety by stopping energization of the motor or reducing the rotational speed.

  In addition, when the motor is stopped or the number of revolutions is reduced, a notification means is provided to notify the abnormality, and the notification means is provided in the vicinity of the displacement handling tool, so that the operation state corresponding to the abnormal stop or abnormality is confirmed. Since the user is informed and the notification means is close to the displacement handling tool, the inspection location can be easily identified, and preparations such as replacement of parts can be performed immediately.

Overall side view of the ceiling fan of example 1 Side view of the main part of the ceiling fan Side view of other main parts of the ceiling fan Side view of the main part showing the relationship between the displacement response tool of the ceiling fan and the pipe The principal part side view showing the relation between the displacement correspondence tool of the ceiling fan and the power supply control tool Side view of the main part showing the connection between the female connector and male connector of the ceiling fan Side view of the main part showing the separated state of female connector and male connector of the ceiling fan Side view of main part showing displacement of pipe and shaft of ceiling fan Side view of the main part showing the mounting state of the flanged cap of the ceiling fan of Reference Example 1 Side view of the main part showing the relationship between the magnet and metal plate of the ceiling fan Block circuit diagram of ceiling fan according to Embodiment 1 of the present invention A block circuit diagram showing the relationship between the control unit and the threshold adjustment unit of the ceiling fan Side view of essential parts showing relationship between magnet and magnetic detector of ceiling fan Side view of the main part showing the relationship between the infrared light receiving / emitting part and the reflector of the ceiling fan The block circuit diagram showing the relationship between the control unit of the ceiling fan and the notification means Side view of the main part of a conventional ceiling fan

The ceiling fan according to claim 1 of the present invention is a motor for rotating a plurality of blades attached in the horizontal direction, a shaft projecting from the upper part of the motor, and being connected to the upper end of the shaft and suspended from the ceiling surface. Corresponding to the relative displacement of the shaft and the pipe, the connecting rod connected to the pipe via a through-hole provided in each of the pipe and the shaft, the female thread portion screwed to the connecting rod, And a power supply control tool for controlling energization to the motor in accordance with the displacement amount detected by the displacement handling tool, and the detected value from the displacement handling tool is obtained. a control unit which receives as an electric signal, and when the control unit is the detection value exceeds the threshold, Ri Na controls or stops the power supply to the motor through the power supply control device, the displacement corresponding Tool, shaft Displaced and be separated into the corresponding fitting and pipe side displacement corresponding device, when connecting the said pipe shaft, which has a structure to be connected at the same time as a pair of the displacement corresponding device, the female screw portion connecting rod When the gap between the shaft and pipe is not fixed firmly, the shaft torque due to the rotational force of the motor is applied to the connecting part of the shaft and pipe due to repeated reaction of stopping the motor operation and shifting. Alternatively, the through hole gradually wears, and the position of the shaft is lowered with respect to the pipe, and the displacement corresponding to the relative displacement is detected or the displacement corresponding tool detects the displacement. Depending on the detected amount of displacement, the power supply to the motor can be controlled by the power supply control tool, and the displacement is changed in accordance with the relative amount of displacement between the shaft and the pipe. It has a control part that receives the detected value from the corresponding tool and the displacement corresponding tool as an electric signal, and can control the operation of the motor by the control part according to the amount of position displacement, and also changes the setting of the threshold value. If the detected value exceeds the set threshold value due to the displacement of the shaft and pipe, this control unit can stop or control the energization of the motor via the power control tool. , The progress of wear of the connecting part can be prevented, and since it is connected simultaneously as a pair of displacement-compatible tools , it is possible to prevent forgetting to install the displacement-compatible tools, and the pipe and shaft are correctly connected due to installation errors during installation, etc. If it is not, the ceiling fan is in an unsafe condition against falling by controlling the power supply to the motor with the power supply controller in response to the relative displacement between the shaft and the pipe. It has the effect of Ru can prevent the use of.

  In addition, a threshold value adjusting unit is provided on the input side of the control unit so that the threshold value can be adjusted. The control unit has a threshold value for comparison with the displacement value detected by the displacement corresponding tool in advance. Although it is set, an adjustment part is provided in the operation part on the input side of the control part, and the threshold value can be adjusted, so that the threshold is set at the construction site when the pipe and shaft are connected. By adjusting the set value of the value, it is possible to set the threshold value corresponding to the detected value of the displacement support tool using the adjustment part of the operation part without fine adjustment of the displacement support tool. There is no need for complicated adjustment work for fine adjustment of a connection portion near the ceiling, and construction work for ensuring safety can be easily performed.

  In addition, a magnet is provided as a pipe-side displacement support tool, a magnetic detection tool is provided as a shaft-side displacement support tool, and the control unit stops or rotates the motor when the detected value of the magnetic detection tool is equal to or less than a threshold value. A magnet is provided as a pipe-side displacement support tool, and a magnetic detection tool connected to the input side of the control unit is provided as a shaft-side displacement support tool. The magnet is close to the magnetic detection tool during normal use. Therefore, the detection value of the magnetic detection tool is large and operates normally, but if the connecting rod or the through-hole wears down and the detection value of the magnetic detection tool falls below the threshold during operation, The controller has the effect of stopping energization of the motor or reducing the number of rotations to prevent the progress of wear of the connecting portion and to ensure safety.

In addition, a reflection plate is provided as a pipe-side displacement support tool, and an infrared light-emitting unit and an infrared light-receiving unit connected to the control unit are provided as a shaft-side displacement support tool. The control unit stops the motor or reduces the number of rotations, and provides a reflector as a pipe side displacement support tool, a pair of infrared light emitting part and infrared light receiving part as a shaft side displacement support tool, and a shallow angle to the reflection plate In the normal operation, the infrared light from the infrared light emitting part is reflected on the reflector and is incident on the infrared light receiving part, so that the detected value of the infrared light receiving part is large and normal operation is performed. When the shaft is displaced downward relative to the pipe, the distance between the infrared light emitter and the reflector increases, so the infrared light reflected by the reflector enters the center of the infrared receiver. Since the detected value of the infrared receiver is significantly reduced,
Since it is below the threshold value, the control unit has the effect of stopping energization of the motor or reducing the number of rotations to prevent the progress of wear of the connecting unit and ensure safety.

  In addition, there is an informing means for notifying abnormality when the motor is stopped or the rotation speed is reduced, and this informing means is provided in the vicinity of the displacement handling tool. When the control unit stops energization to the motor or reduces the rotation speed when the danger is that the shaft is displaced relatively downward with respect to the pipe by providing notification means for notification, By activating the notification means, the user is informed that the operation is an abnormal stop or operation corresponding to the abnormality, and since the notification means is close to the displacement response tool, the inspection location can be easily identified, so It has the effect that preparations such as replacement can be performed immediately.

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

(Assumption example 1)
As shown in FIGS. 1 to 8, the motor 2 of the ceiling fan supports a plurality of blades 1 arranged radially in the horizontal direction so as to be rotatable, and has a shaft 3 protruding from the top of the motor 2. The lower end of the pipe 5 having a larger diameter is connected to the upper end of the shaft 3 having a smaller diameter, and the upper end of the pipe 5 is engaged with a fixing bracket (not shown) fixed to the ceiling surface 4. Is suspended from the ceiling surface 4. That is, a through-hole 12 is provided in each of the pipe 5 and the shaft 3, and the pipe 5 and the shaft 3 are connected by a bolt-shaped connecting rod 6 that passes through the through-hole 12, and the female screw portion 13 is screwed and fixed to the connecting rod 6. In addition, the displacement corresponding tool 7 which is displaced corresponding to the relative positional displacement amount between the shaft 3 and the pipe 5 or detects the displacement amount Y, and the displacement of the displacement corresponding tool 7 or according to the detected displacement amount Y. And a power control tool 8 for controlling energization of the motor 2.

  Moreover, the displacement corresponding tool 7 is provided so as to be separable into a shaft side displacement corresponding tool 7b provided on the shaft 3 side and a pipe side displacement corresponding tool 7a provided on the pipe 5 side.

  Further, the displacement handling tool 7 is fixed with the end 9 of the pipe 5 as a reference.

  Further, the power control tool 8 can be separated into a power supply tool 8a provided on the pipe side displacement support tool 7a and a power supply tool 8b provided on the shaft side displacement support tool 7b.

  Further, the power supply tool 8a provided on the pipe 5 side and the pipe side displacement support tool 7a are integrated to form a female connector 10, and the power supply receiving tool 8b provided on the shaft 3 side and the shaft side displacement support tool 7b are integrated. The male connector 11 is used.

With the above configuration, the shaft 3 of the motor 2 that rotates the blade 1 is suspended through the pipe 5 suspended from the ceiling surface 4. At this time, the diameter of the shaft 3 is reduced to the lower part of the hollow pipe 5 having a larger diameter. The upper part of the hollow shaft 3 is inserted, and the through holes 12 provided in the shaft 3 and the pipe 5 are further held by the bolt-shaped connecting rod 6 passing through and fixing the other end with the female screw part 13. . At this time, when the internal thread portion 13 is not firmly fixed to the connecting rod, a gap between the shaft 3 and the pipe 5 is generated. That is, a bolt or the like is used for the connecting rod 6, the tip of the penetrating bolt is strongly tightened with a nut, and the clearance between the shaft 3 and the pipe 5 is eliminated. Even if it joins the connecting portion, the shaft 3 does not rotate with respect to the pipe 5, and the connecting rod 6 or the through hole 12 is less likely to be worn. Not limited to this, when a gap is generated, the shaft torque due to the rotational force of the motor 2 is applied to the connecting portion of the shaft 3 and the pipe 5 by the repetition of stopping the operation of the motor 2 or performing a shift, and the connecting rod 6 or the through hole 12 gradually wears and the position of the shaft 3 with respect to the pipe 5 is lowered. At this time,
The displacement corresponding to the relative displacement amount Y between the shaft 3 and the pipe 5 or the displacement corresponding tool 7 for detecting the displacement amount Y energizes the motor 2 in accordance with the displacement state or the detected displacement amount Y. By controlling the power by the power supply control tool 8, it is possible to prevent the progress of wear of the connecting portion.

  Further, since the displacement corresponding tool 7 can be separated into the shaft side displacement corresponding tool 7b and the pipe side displacement corresponding tool 7a, when connecting the pipe 5 and the shaft 3 during product assembly at the construction site, Since the displacement correspondence tool 7 is connected at the same time, it is possible to prevent forgetting to attach the displacement correspondence tool 7, and when the pipe 5 and the shaft 3 are not correctly connected, the shaft due to wear of the connection rod 6 or the through hole 12 is prevented. In response to the relative displacement between the pipe 3 and the pipe 5, the power supply control tool 8 controls the energization of the motor 2, thereby preventing the use of the ceiling fan in an unsafe state against falling.

  Moreover, by fixing the displacement corresponding tool 7 with the end 9 of the pipe 5 as a reference, it is possible to easily align the position of the displacement corresponding tool 7 when assembling, and to improve workability during construction and manufacturing. At the same time, since the displacement corresponding tool 7 can be fixed against the end portion 9 of the pipe 5, it can be positioned accurately, and the detection accuracy of the displacement amount Y detected or displaced can be increased.

  Further, the power control tool 8 is separably provided to a power supply tool 8a connected to a commercial power source and a power supply tool 8b connected to the motor 2, and the power supply tool 8a is attached to the pipe 5 so that the shaft 3 When the shaft 3 is connected to the pipe 5 by attaching the power supply receiving tool 8b to the above, it functions as a pair of displacement corresponding tool 7 and the power supply control tool 8. That is, when the pipe 5 and the shaft 3 are not correctly connected, when the position of the shaft 3 fluctuates with respect to the pipe 5 due to wear of the connecting rod 6 or the through-hole 12, the power control interlocked with the displacement corresponding tool 7 By stopping the energization of the motor 2 with the tool 8, the operation in an unsafe state can be stopped.

  Further, by providing a female connector 10 in which the pipe-side displacement support tool 7a and the power supply tool 8a are integrated, and a male connector 11 in which the shaft-side displacement support tool 7b and the power supply tool 8b are integrated, a pipe is provided. When a dangerous situation occurs in which the shaft 3 is displaced downward relative to the male connector 5, a strong downward force exceeding the allowable range acts on the male connector 11 and the female connector 10, and the male connector 11 and the female connector 10 are separated, the conduction to the motor 2 is interrupted and the operation can be stopped.

(Reference Example 1)
As shown in FIGS. 9 and 10, the flanged cap 14 that covers the distal end portion 25 of the shaft 3 is inserted between the shaft 3 and the pipe 5, and the material of the flanged cap 14 is made of synthetic resin. Yes.

  Further, a flanged cap 14 fitted between the shaft 3 and the pipe 5 is fixed to the pipe 5 substantially integrally, and is used as a pipe side displacement corresponding tool 7a.

  Moreover, it is set as the structure which provided the magnet 15 in one of the shaft side displacement corresponding tool 7b and the pipe side displacement corresponding tool 7a, and provided the metal plate 16 in the other.

  While covering the front-end | tip part 25 of the shaft 3 by the said structure and providing the hooked cap 14 inserted between this shaft 3 and the pipe 5, while protecting the front-end | tip part 25 of the shaft 3 and preventing a deformation | transformation, When the distal end portion 25 of the shaft 3 is inserted into the pipe 5, a sliding function is provided so that the hole position is matched at a position where the end portion 9 of the pipe 5 is in contact with the flange portion 26 of the flanged cap 14. Therefore, the workability of attaching the shaft 3 and the pipe 5 can be improved. In addition, the ceiling fan may change the length of the pipe 5 depending on the ceiling height or the like. However, it is only necessary that the shaft 3 of the motor 2 has a hooked cap 14 that matches the inner dimension of the pipe 5. The pipe 5 having a length corresponding to the site can be freely selected.

  Further, by using a synthetic resin as the material of the flanged cap 14, even if the inner diameter dimensional accuracy of the metal pipe 5 and the outer dimension accuracy of the shaft 3 are low, the synthetic resin flanged cap 14 can reduce the size and surface roughness. By absorbing the thickness and increasing the degree of adhesion, it is possible to prevent the connection rod 6 or the through hole 12 from being worn. Further, when shaft torque due to the rotational force of the motor 2 is applied to the connecting portion between the shaft 3 and the pipe 5 due to repeated turning on or off of the motor 2, contact noise or rubbing noise is generated from the gap or backlash of the connecting portion. However, since the hooked cap 14 is made of a synthetic resin, it functions as a cushioning material, which suppresses vibration transmission and prevents abnormal noise.

  Further, by fixing the flanged cap 14 substantially integrally with the pipe 5 and using the pipe side displacement corresponding tool 7a, there is a risk that the connecting rod 6 or the through hole 12 is worn and the pipe 5 and the shaft 3 are displaced. At that time, since the flanged cap 14 is reliably displaced together with the pipe 5, the displacement amount Y of the pipe 5 and the shaft 3 can be accurately detected.

  Further, the shaft-side displacement support tool 7b and the pipe-side displacement support tool 7a are a combination of the magnet 15 and the metal plate 16, and a power supply receiving tool 8b is provided directly or close to the shaft-side displacement support tool 7b. By providing the power supply tool 8a directly or close to the displacement support tool 7a, the magnet 15 is attached to the metal plate 16 during normal use, and the power supply tool 8a and the power supply tool 8b are connected. When the rod 6 or the through-hole 12 is worn and the displacement amount Y increases, when the downward gravity more than the magnetic force applied to the magnet 15 and the metal plate 16 is applied, the magnet 15 and the metal plate 16 are separated and the power supply tool 8a. And the power supply receiving tool 8b are also separated, so that the motor 2 can be safely stopped by shutting off the energization of the motor 2.

(Embodiment 1)
As shown in FIGS. 11 to 15, a displacement corresponding tool 7 that detects a displacement amount Y corresponding to a relative positional displacement amount between the shaft 3 and the pipe 5, and a detected value from the displacement corresponding tool 7 is an electric value. The controller 17 receives as a signal, and this controller 17 controls or stops energization of the motor 2 via the power supply control tool 8 when the detected value exceeds a threshold value.

  Further, a threshold adjustment unit 18 is provided on the input side of the control unit 17 so that the threshold can be adjusted.

  Further, the magnet 23 is provided as the pipe-side displacement support tool 7a, the magnetic detection tool 19 is provided as the shaft-side displacement support tool 7b, and the control unit 17 has a detection value of the magnetic detection tool 19 that is equal to or less than a threshold value. The motor 2 is stopped or the rotational speed is reduced.

  Moreover, the reflecting plate 20 is provided as the pipe-side displacement support tool 7a, and the infrared light-emitting unit 21 and the infrared light-receiving unit 22 connected to the control unit 17 are provided as the shaft-side displacement support tool 7b. When the value is equal to or lower than the threshold value, the control unit 17 stops the motor 2 or reduces the rotational speed.

  Further, it has a notification means 27 for notifying abnormality when the motor 2 is stopped or the rotational speed is reduced, and this notification means 27 is provided in the vicinity of the displacement handling tool 7.

With the above-described configuration, the displacement corresponding tool 7 that is displaced corresponding to the relative positional displacement amount between the shaft 3 and the pipe 5 and the control unit 17 that receives the detection value from the displacement corresponding tool 7 as an electric signal are provided. The operation of the ceiling fan can be controlled by the control unit 17 according to the amount of positional displacement,
The setting of the threshold value can also be changed. When the detected value exceeds the set threshold value due to the displacement of the shaft 3 and the pipe 5, the control unit 17 is connected via the power supply control tool 8. By stopping or controlling the energization of the motor 2, it is possible to prevent the progress of wear of the connecting portion.

  The control unit 17 is preset with a threshold value for comparison with the displacement value detected by the displacement corresponding tool 7, but an adjustment unit is provided in the operation unit on the input side of the control unit 17, and the threshold value is set. By making the set value adjustable, it is possible to adjust the set value of the threshold value at the construction site at the end of the construction where the pipe 5 and the shaft 3 are connected without fine adjustment of the displacement corresponding tool 7. The threshold value corresponding to the detection value of the displacement handling tool 7 can be set using the adjustment part of the operation part, and the complicated adjustment work to finely adjust the connecting part after construction is not required, ensuring safety. It is possible to easily perform the construction work to do.

  Further, a magnet 23 is provided as the pipe-side displacement support tool 7a, and a magnetic detection tool 19 connected to the input side of the control unit 17 is provided as the shaft-side displacement support tool 7b. The magnet 23 is close to the magnetic detection tool 19 during normal use. Therefore, the detection value of the magnetic detector 19 is large and the control is performed normally, but the connecting rod 6 or the through-hole 12 is worn and the detected value of the magnetic detector 19 becomes a threshold value during the operation. When it becomes below, the control part 17 can stop the electricity supply to the motor 2, or can reduce rotation speed, can prevent progress of wear of a connection part, and can ensure safety | security.

  In addition, the reflector 20 is provided as the pipe-side displacement support tool 7a, and the pair of infrared light-emitting portions 21 and infrared light-receiving portions 22 are provided as the shaft-side displacement support tool 7b so as to face the reflection plate 20 at a shallow angle. During operation, the infrared light 24 from the infrared light emitting unit 21 is reflected by the reflecting plate 20 and is incident on the infrared light receiving unit 22, so that the detected value of the infrared light receiving unit 22 is large and normal operation is performed. On the other hand, when the shaft 3 is displaced relatively downward, the distance between the infrared light emitting unit 21 and the reflecting plate 20 increases, so that the infrared light 24 reflected by the reflecting plate 20 deviates from the center of the infrared light receiving unit 22. Since the incident light is incident, the detection value of the infrared light receiving unit 22 is greatly reduced to be equal to or less than the threshold value. Therefore, the control unit 17 stops energization to the motor 2 or reduces the number of rotations to reduce the wear of the connecting unit. Prevent line, it is possible to ensure safety.

  Further, by providing the notifying means 27 for notifying the abnormality in the vicinity of the displacement handling tool 7, the control unit can be used when a dangerous situation occurs in which the shaft 3 is displaced downward relative to the pipe 5. When the energization of the motor 2 is stopped or the rotation speed is reduced, the notifying unit 27 is activated to inform the user that the operation is an abnormal stop or an operation corresponding to the abnormality, and the notifying unit 27 is displaced. Since it is close to the corresponding tool 7, the inspection location can be easily identified, so that preparations such as replacement of parts can be made immediately.

  As the notification means 27, an abnormal state can be notified to the user by using a hearing means such as a buzzer sound or a voice, or a visual means such as LED blinking or character display.

  A ceiling fan according to the present invention includes a motor that rotates a plurality of blades attached in the horizontal direction, a shaft that protrudes from the top of the motor, a pipe that is connected to the upper end of the shaft and is suspended from the ceiling surface, A displacement amount corresponding to a relative displacement between the pipe and the pipe, a connecting rod connected through a through-hole provided in each of the shafts, a female thread portion screwed into the connecting rod, and the shaft and the pipe And a power supply control tool that controls energization to the motor in accordance with the amount of displacement detected by the displacement handling tool, and receives a detection value from the displacement handling tool as an electrical signal. A control unit, and when the detected value exceeds a threshold value, the control unit is configured to control or stop energization of the motor via the power supply control tool, so that the female screw portion is connected to the connecting rod. Firm If it is not fixed, the shaft torque due to the rotational force of the motor is applied to the connecting part of the shaft and pipe due to the repetition of stopping the motor operation and shifting, and the connecting rod or through hole gradually wears and becomes unsafe However, since the operation of the ceiling fan can be controlled according to the position displacement amount by the displacement corresponding tool corresponding to the relative displacement amount of the shaft and the pipe, if the shaft and the pipe are displaced, By stopping or controlling the energization, it is possible to prevent the progress of wear of the connecting portion and suspend the ceiling fan safely.

DESCRIPTION OF SYMBOLS 1 Blade 2 Motor 3 Shaft 4 Ceiling surface 5 Pipe 6 Connecting rod 7 Displacement support tool 7a Pipe side displacement support tool 7b Shaft side displacement support tool 8 Power supply control tool 8a Power supply tool 8b Power supply tool 9 End 10 Female connector 11 Male connector 12 Through-hole 13 Female screw part 14 Cap with flange 15 Magnet 16 Metal plate 17 Control part 18 Threshold adjustment part 19 Magnetic detector 20 Reflector plate 21 Infrared light emitting part 22 Infrared light receiving part 23 Magnet 24 Infrared ray 25 Tip part 26 Isobe 27 Notification Means

Claims (5)

A motor that rotates a plurality of blades attached in the horizontal direction, a shaft that protrudes from the top of the motor, a pipe that is connected to the upper end of the shaft and is suspended from the ceiling, and a pipe that is provided on the pipe and the shaft. A connecting rod connected through the through-hole, a female thread portion screwed into the connecting rod, a displacement corresponding tool for detecting a displacement amount corresponding to a relative positional displacement amount between the shaft and the pipe, It has a power supply control tool that controls energization to the motor in accordance with the amount of displacement detected by the displacement handling tool, and has a control unit that receives a detection value from the displacement handling tool as an electric signal. parts are when the detected value exceeds the threshold, the power control device Ri Na controls or stops the power supply to the motor via, the displacement corresponding device, the shaft-side displacement corresponding tool and pipe side displacement With corresponding tools Away possible and then, when connecting the pipe and the shaft, configuration and the ceiling fan to be connected at the same time as a pair of the displacement corresponding tool. The ceiling fan according to claim 1, wherein a threshold adjustment unit is provided on an input side of the control unit so that the threshold can be adjusted. A magnet is provided as a pipe-side displacement support tool, and a magnetic detection tool is provided as a shaft-side displacement support tool. When the detected value of the magnetic detection tool falls below a threshold value, the control unit stops the motor or reduces the number of rotations. ceiling fan according to claim 1 or 2, wherein formed by. A reflector is provided as a pipe-side displacement support tool, and an infrared light-emitting unit and an infrared light-receiving unit connected to the control unit are provided as shaft-side displacement support tools. The ceiling fan according to claim 1, wherein the unit is configured to stop the motor or reduce the rotational speed. The ceiling fan according to any one of claims 1 to 4, further comprising an informing means for notifying an abnormality when the motor is stopped or the number of rotations is reduced, and the informing means is provided close to the displacement handling tool.

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