JP2012117545A - Ceiling fan - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ceiling fan capable of automatically detecting such a phenomenon that a connecting rod or a through-hole is gradually worn out, and capable of safely stopping operation, when a female screw part that is screwed around the connecting rod penetrates a shaft and a pipe is sufficiently not secured.SOLUTION: The ceiling fan includes: a shaft 3 that upward protrudes from a motor 2 for rotating a blade 1; a pipe 5 that is connected to an upper end of the shaft 3 to be suspended on a ceiling surface 4; the connecting rod 6 via the through-hole 12 provided in the pipe 5 and the shaft 3; a displacement corresponding tool 7 that detects a relative displacement Y between the shaft 3 and the pipe 5; and a power control tool 8 that controls power distribution to the motor 2 according to the displacement Y of the displacement corresponding tool 7. The ceiling fan can avoid risk such as falling by controlling the power distribution to the motor 2 through the displacement Y detected by the displacement corresponding tool 7 and preventing deterioration of wear-out of a connecting part.

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 corresponding tool for displacing or detecting the amount of displacement, and a power supply control tool for controlling energization to the motor in accordance with the displacement of the displacement corresponding tool or the detected amount of displacement. The corresponding tool is detachably provided in a shaft side displacement support tool provided on the shaft side and a pipe side displacement support tool provided on the pipe side, and the pipe and the shaft are connected. To, those made of a structure to be connected at the same time as a pair of the displacement corresponding tool.

  Another means is that the power control tool is separable into a power supply tool provided in the pipe side displacement support tool and a power supply tool provided in the shaft side displacement support tool.

  The other means is that the power supply tool provided on the pipe side and the pipe side displacement support tool are integrated to form a female connector, and the power supply tool provided on the shaft side and the shaft side displacement support tool are integrated to form a male connector. Type connector.

  In addition, the other means is provided with a hooked cap fitted between the shaft and the pipe while covering the tip of the shaft.

  Another means is that the material of the hooked cap is made of synthetic resin.

  Another means is to fix the hooked cap fitted between the shaft and the pipe substantially integrally with the pipe and to make the pipe side displacement support tool.

  Another means is to provide a magnet on one of the shaft side displacement support tool and the pipe side displacement support tool and provide a metal plate on the other.

  In addition, the other means includes a displacement corresponding tool that detects a displacement amount corresponding to a relative positional displacement amount between the shaft and the pipe, and a control unit that receives a detection value from the displacement corresponding tool as an electric signal. When the detected value exceeds a threshold value, the control unit controls or stops energization to the motor via the power supply control 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 screw portion screwed into the connecting rod, and a displacement corresponding to a relative positional displacement amount of the shaft and the pipe, or A displacement response tool for detecting a displacement amount; and a power supply control tool for controlling energization to the motor in accordance with the displacement of the displacement response tool or the detected displacement amount. The displacement response tool is provided on the shaft side. When the pipe and the shaft are connected to each other as a pair of the displacement corresponding tools, the shaft side displacement corresponding tool and the pipe side displacement corresponding tool provided on the pipe side are separable. When the internal thread portion is not firmly fixed to the connecting rod, the axial torque due to the rotational force of the motor is caused by the rotational force of the motor between the shaft and the pipe. Joining the connecting part, the connecting rod or through-hole gradually wears out and becomes unsafe, but it is connected by controlling the energization to the motor with a displacement counter corresponding to the relative displacement of the shaft and pipe. Can prevent the use of the ceiling fan in an unsafe condition against dropping when the pipe and shaft are not properly connected due to installation errors during installation, etc. It is possible to provide a ceiling fan that can be easily aligned at the time of assembling the tool and can improve workability during construction and manufacturing.

  In addition, since the power control tool can be separated into a power supply tool provided on the pipe side displacement support tool and a power supply tool provided on the shaft side displacement support tool, when the shaft is connected to the pipe, a pair of It functions as a displacement response tool and a power supply control tool, and the power supply control tool linked to the displacement response tool stops energization of the motor, so that the operation in an unsafe state can be stopped and the pipe and shaft can be connected. By being separable, the dimension at the time of product packing can be made small.

  Also, the power supply tool provided on the pipe side and the pipe side displacement support tool are integrated to form a female connector, and the power supply tool provided on the shaft side and the shaft side displacement support tool are integrated to form a male connector. Therefore, when a dangerous situation occurs in which the shaft is displaced downward relative to the pipe, a strong downward force exceeding the allowable range is applied to the male connector and the female connector. Since the female connector is separated, the conduction to the motor is interrupted and the operation can be stopped.

  In addition to covering the tip of the shaft and providing a hooked cap that fits between the shaft and the pipe, the pipe corresponding to the installation site can be freely selected, and the amount of displacement between the pipe and the shaft is accurately detected. Therefore, the conduction to the motor can be reliably cut off, the operation of the ceiling fan can be stopped or decelerated, and the progress of wear of the connecting portion can be prevented.

  In addition, by using a synthetic resin for the flanged cap, the degree of adhesion between the shaft and the pipe is increased, and the occurrence of wear due to slight movement of the connecting rod or connecting hole can be suppressed. Since it is a flexible material, it becomes a cushioning material, and exhibits an anti-vibration function and can prevent the generation of abnormal noise.

  In addition, the hooked cap fitted between the shaft and the pipe is fixed to the pipe substantially integrally, and the pipe side displacement support tool can be used to accurately detect the displacement of the pipe and the shaft. The conduction to the motor is interrupted, the operation of the ceiling fan is stopped or slowed down, the progress of wear of the connecting portion can be prevented, and the ceiling fan can be prevented from falling.

  Further, by providing a magnet on one of the shaft side displacement support tool and the pipe side displacement support tool and providing a metal plate on the other, the connecting rod or the through hole is worn and displaced, and the magnet and the metal plate attract each other due to the displacement. When a vertical downward force greater than a specified value is applied, the shaft-side displacement support tool and the pipe-side displacement support tool are separated from each other, so that the conduction to the motor can be cut off and the operation can be safely stopped.

  In addition, it has a displacement corresponding tool that detects the displacement amount corresponding to the relative positional displacement amount of the shaft and the pipe, and a control unit that receives the detection value from the displacement corresponding tool as an electrical signal. When the detected value exceeds the threshold value, the operation of the ceiling fan can be controlled according to the amount of displacement by controlling or stopping the energization to the motor via the power supply control tool. When the displacement occurs, by stopping or controlling the energization to the motor, it is possible to prevent the progress of wear of the connecting portion and to suspend the ceiling fan safely.

  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.

Whole side view of ceiling fan of Embodiment 1 of the present invention 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 The principal part side view which shows the attachment state of the flanged cap of the ceiling fan of Embodiment 2 of this invention Side view of the main part showing the relationship between the magnet and metal plate of the ceiling fan Same as above, block diagram of ceiling fan 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 displacement control tool for detecting the amount of displacement, and a power supply control tool for controlling energization to the motor according to the displacement of the displacement support tool or the detected displacement amount. The shaft side displacement support tool provided on the shaft side and the pipe side displacement support tool provided on the pipe side are separably provided, and when the pipe and the shaft are connected, a pair of When it is configured to be simultaneously connected as a displacement corresponding tool, and the female screw part is not firmly fixed to the connecting rod and a gap between the shaft and the pipe is generated, by repetitive recoil when stopping the operation of the motor or performing speed change, Axial torque due to the rotational force of the motor is applied to the connecting part of the shaft and the pipe, the connecting rod or the through hole gradually wears, and the position of the shaft is lowered with respect to the pipe, corresponding to this relative displacement. With the displacement corresponding tool that displaces or detects the displacement amount, the power supply to the motor can be controlled by the power supply control tool in accordance with the displacement state or the detected displacement amount, and the progress of wear of the connecting portion is prevented. At the time of product assembly at the construction site, when connecting the pipe and the shaft, they are connected simultaneously as a pair of displacement support tools. If the pipe and the shaft are not connected correctly, the power control device can be used to apply power to the motor in response to the relative displacement between the shaft and the pipe due to wear of the connecting rod or through hole. Can be used to prevent the ceiling fan from being used in an unsafe state against falling, and fixing the displacement support tool with the end of the pipe as a reference facilitates alignment when mounting the displacement support tool. And has the effect of improving workability during construction and manufacturing.

  Further, the power control tool can be separated into a power supply tool provided on the pipe side displacement support tool and a power supply tool provided on the shaft side displacement support tool, and the power control tool is connected to a commercial power source. When the shaft is connected to the pipe by attaching the power supply tool to the pipe and attaching the power supply tool to the shaft, the power supply tool can be separated from the power supply tool connected to the motor or power circuit. In addition, it will function as a pair of displacement response tool and power supply control tool, and when the pipe and the shaft are not correctly connected, when the position of the shaft fluctuates with respect to the pipe due to wear of the connecting rod or through hole, By stopping energization of the motor with the power supply controller linked to the displacement response tool, the operation in an unsafe state can be stopped. That.

  Also, the power supply tool provided on the pipe side and the pipe side displacement support tool are integrated into a female connector, and the power supply tool provided on the shaft side and the shaft side displacement support tool are integrated into a male connector. The shaft is attached to the pipe by providing a female connector in which the pipe-side displacement support tool and the power supply tool are integrated, and a male connector in which the shaft-side displacement support tool and the power supply receiving tool are integrated. When a dangerous situation of relatively downward displacement occurs, the male connector and the female connector are subjected to a strong downward force exceeding the allowable range, and the male connector and the female connector are separated. It has an effect that the conduction to the motor is interrupted and the operation can be stopped.

  In addition, it covers the tip of the shaft and is provided with a hooked cap that fits between the shaft and the pipe, covers the tip of the shaft, and fits between the shaft and the pipe. By providing a cap with a cap, the tip of the shaft is protected to prevent deformation, and when the tip of the shaft is inserted into the pipe, it slides and the position where the tip of the pipe contacts the hook of the hooked cap Because it has a guide function that the hole position matches, it can improve the workability of mounting the shaft and pipe, and the ceiling fan may change the length of the pipe depending on the ceiling height etc. Since it is only necessary to provide a hooked cap that matches the inner dimensions of the pipe on the shaft of the motor, it is possible to freely select a pipe of a length corresponding to the installation site Cormorant having an effect.

  In addition, the material of the flanged cap is made of synthetic resin. By using a flanged cap made of synthetic resin that is more flexible than metal, the inner diameter dimensional accuracy of the metal pipe and the outer dimension accuracy of the shaft are low. However, it is possible to absorb the size and surface roughness with the synthetic resin brazed cap, and to increase the degree of adhesion, it is possible to suppress the occurrence of wear due to slight movement of the connecting rod or connecting hole, and the ceiling fan When axial torque due to the rotational force of the motor is applied to the connecting part of the shaft and pipe due to repeated ON or OFF, contact noise or rubbing noise may be generated from the gap or backlash of the connecting part. Since it is made of synthetic resin, it functions as a cushioning material, and has the effect of suppressing the transmission of vibration and preventing the generation of abnormal noise.

  In addition, the hooked cap fitted between the shaft and the pipe is fixed to the pipe almost integrally, and by using a pipe side displacement support tool, the connecting rod or the through-hole is worn, and the displacement of the pipe and the shaft is large. When it is unsafe, the hooked cap is surely displaced together with the pipe, so that the displacement of the pipe and the shaft can be accurately detected.

  Further, a magnet is provided on one of the shaft side displacement support tool and the pipe side displacement support tool, and a metal plate is provided on the other side. The shaft side displacement support tool and the pipe side displacement support tool are composed of a magnet and a metal plate. In addition to the combination, a magnet is attached to the metal plate during normal use by providing a power supply tool directly or close to the shaft side displacement support tool and providing a power supply tool directly or close to the pipe side displacement support tool. The power supply tool and the power supply tool are connected, but when the connecting rod or the through-hole wears down and the displacement increases, the magnet is applied when downward gravity more than the magnetic force applied to the magnet and the metal plate is applied. The metal plate is separated and the power supply tool and power supply tool are separated, so that the motor can be cut off and the ceiling fan can be safely stopped. It is having an effect.

  In addition, it has a displacement corresponding tool that detects the displacement amount corresponding to the relative positional displacement amount of the shaft and the pipe, and a control unit that receives the detection value from the displacement corresponding tool as an electrical signal. When the detected value exceeds a threshold value, the energization to the motor is controlled or stopped via the power supply control tool, and the displacement is performed in accordance with the relative positional displacement amount between the shaft and the pipe. And a control unit that receives a detection value from the displacement response tool as an electrical signal. The control unit can control the operation of the motor according to the amount of positional displacement, and can also set a threshold value. When the detected value exceeds the set threshold value due to the displacement of the shaft and pipe, this control unit stops or controls the energization of the motor via the power supply control tool. As a result, the wear of the connecting part Such an action can be prevented.

  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. Therefore, since the detection value of the infrared light receiving part is greatly reduced to be below the threshold value, the control part stops energization to the motor or reduces the rotation speed to prevent the progress of wear of the connecting part, It has the effect | action that safety | security can be ensured.

  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.

(Embodiment 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 vip 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. 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 4. At this time, a hollow having a small diameter is formed below the hollow pipe 5 having a large diameter. The upper part of the shaft 3 is inserted, and through the through holes 12 provided in the shaft 3 and the pipe 5 respectively, the bolt-shaped connecting rod 6 penetrates and the other end is fixed by 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 not easily worn, but it is not necessarily tight enough to eliminate the gap between the shaft 3 and the pipe 5 during installation. 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 changing the speed, 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 motor 2 is displaced according to the displacement state or the detected displacement amount Y by the displacement corresponding tool 7 which is displaced corresponding to the relative displacement amount Y between the shaft 3 and the pipe 5 or detects the displacement amount Y. By controlling the energization to the power supply controller 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.

(Embodiment 2)
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 shut off safely by shutting off the energization.

(Embodiment 3)
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 in accordance with the position displacement amount, and the setting of the threshold value can be changed, and the detected value is set by the displacement of the shaft 3 and the pipe 5. When the threshold value is exceeded, the control unit 17 can stop or control the energization of the motor 2 via the power supply control tool 8, thereby preventing the progress of wear of the connecting unit.

  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 projects 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, The pipe and the shaft are connected to each other through a through-hole, a female thread portion screwed into the connection bar, and the shaft and the pipe are displaced in accordance with the relative displacement. Or a displacement corresponding tool for detecting a displacement amount, and a power supply control tool for controlling energization to the motor according to the displacement of the displacement corresponding tool or the detected displacement amount. When the pipe and the shaft are connected to each other, the pair of the displacement is provided in a separable manner. When the gap between the shaft and the pipe is generated without the female screw part being firmly fixed to the connecting rod, the motor is stopped by repeating the recoil when the motor is stopped or shifted. Axial torque due to rotational force is applied to the connecting part of the shaft and the pipe, the connecting rod or the through hole gradually wears, and the position of the shaft with respect to the pipe is lowered, corresponding to this relative displacement amount. The power supply control tool can control the energization of the motor according to the displacement state or the detected displacement amount by the displacement corresponding tool that is displaced or detects the displacement amount, thereby preventing the progress of wear of the connecting portion. Yes, when assembling the product at the construction site, when connecting the pipe and the shaft, they are connected together as a pair of displacement support tools, so you can avoid forgetting to install the displacement support tools. When the pipe and the shaft are not connected correctly, the power supply control device controls the energization of the motor in response to the relative displacement of the shaft and the pipe due to wear of the connecting rod or through hole. Therefore, it is possible to prevent the use of the ceiling fan in an unsafe state against falling, and by fixing the displacement support tool with the end of the pipe as a reference, it is possible to easily align the position of the displacement support tool. Workability at the time of construction and manufacturing can be improved.

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 (12)

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. Displacement corresponding to the relative positional displacement amount of the shaft and the pipe, or displacement for detecting the displacement amount And a power supply control tool that controls energization to the motor in accordance with the displacement of the displacement handling tool or the detected amount of displacement, and the displacement handling tool is provided on the shaft side. And a pipe-side displacement counterpart provided on the pipe side so as to be separable, and when connecting the pipe and the shaft, they are simultaneously connected as a pair of the displacement counterparts. Ceiling fan made as a formation. The ceiling fan according to claim 1, wherein the power control tool is separable into a power supply tool provided in the pipe side displacement support tool and a power supply tool provided in the shaft side displacement support tool. The power supply tool provided on the pipe side and the pipe side displacement support tool are integrated to form a female connector, and the power supply tool provided on the shaft side and the shaft side displacement support tool are integrated to form a male connector. Or the ceiling fan of 2. The ceiling fan according to any one of claims 1 to 3, wherein a ceiling cap is fitted between the shaft and the pipe while covering a tip portion of the shaft. The ceiling fan according to claim 3, wherein the material of the hooked cap is made of synthetic resin. The ceiling fan according to any one of claims 1 to 4, wherein a flanged cap fitted between the shaft and the pipe is fixed to the pipe substantially integrally, and is used as a pipe side displacement support tool. The ceiling fan according to claim 2 or 6, wherein a magnet is provided on one of the shaft side displacement support tool and the pipe side displacement support tool, and a metal plate is provided on the other. A displacement corresponding tool for detecting a displacement amount corresponding to a relative positional displacement amount between the shaft and the pipe, and a control unit that receives a detection value from the displacement corresponding tool as an electric signal, and the control unit detects the detection The ceiling fan according to claim 1, wherein when the value exceeds a threshold value, energization to the motor is controlled or stopped via a power supply control tool. The ceiling fan according to claim 8, 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. The ceiling fan according to claim 8 or 9, wherein 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 8 or 9, wherein the unit stops the motor or reduces the rotational speed. The ceiling fan according to claim 1 or 8, further comprising an informing means for notifying an abnormality when the motor is stopped or the number of revolutions is reduced, and the informing means is provided in the vicinity of the displacement handling tool.

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