JP4962276B2 - Ceiling fan - Google Patents

Description

  The present invention mainly relates to a ceiling fan used by being attached to an indoor ceiling surface.

  Conventionally, there is a ceiling fan of this type in which a blade is sandwiched between a support frame and a rotor and fixed.

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

  As shown in the figure, a disk-like stator 103 fixed through the shaft 104 at the center, an annular rotor 105 provided in the vicinity of the periphery of the stator 103, and the upper and lower sides of the rotor 105 The upper support frame 101 and the lower support frame 102 which are fixed to the shaft and rotatably supported by the shaft, and one end is inserted into a plurality of apertures provided in the peripheral side portion of the upper support frame 101 to form a radial shape. And a plurality of blades 115 disposed on the surface.

When fixing the blade plate 115 to the rotor 105, the blade plate 115 can be temporarily held and conveniently operated by inserting the blade plate 115 between the upper support portion 101 and the rotor 105. Even after being fixed, the number of surfaces of the fixed portion of the blade plate 115 that abuts in the vertical direction increases, so that it can be firmly supported against the load in the vertical direction, and a rational structure that reduces the blade frame should be adopted. It is something that can be done.
Japanese Patent Laid-Open No. 2-188893 (FIGS. 1 and 2)

  In such a conventional ceiling fan, the blade frame is reduced and the blade plate is directly fixed to the rotor. Further, in order to reduce the weight of the metal blade plate, the plate thickness is reduced and the weight is reduced. In this case, since the rigidity and strength of the slats are also reduced, stress concentrates on the roots of the slats as a reaction to push down the air of the slats. There is a safety problem that it may be damaged and fall, and the slat does not easily break at the root part, and it does not separate from the rotor even if the slat is damaged at the root part. It is requested.

  The present invention solves such a conventional problem, and even when a repeated load is applied to a metal vane plate attached to a rotor of a motor, the vane shape does not easily break, and even the vane An object of the present invention is to provide a ceiling fan capable of ensuring safety by being able to be moored on the rotor side so that the blades are not separated even if the plates are broken.

In order to achieve the above object, the ceiling fan of the present invention includes a disk-shaped stator having a fixed shaft at the center, an annular rotor provided in the vicinity of the stator, and the rotor. And a plurality of metal blades detachably provided on the support frame, the blades extending from the root part and fixed to the support frame. And a wing plate having one end fixed to the support frame via the root portion and the other end locked to the wing portion, wherein the vane plate includes the root portion and the wing portion. It has an inclined stepped portion that maintains the wing portion tilted from the horizontal in a part between the portions , and the locking tool is disposed so as to straddle the stepped portion, and the width of the blade is increased. The dimensions are the same from the root to the vicinity of the tip of the wing.

According to the present invention, a disk-shaped stator having a fixed shaft at the center, an annular rotor provided close to the periphery of the stator, and a support frame fixed to the periphery of the rotor The blade has a plurality of metal blades detachably provided on the support frame. The blade plate includes a root portion fixed to the support frame and a wing portion extending from the root portion, and one end thereof It is fixed to the support frame via the root portion, and includes a locking tool whose other end is locked to the wing portion, and the blade is disposed in a part between the root portion and the wing portion. It has an inclined stepped portion that maintains the wing portion in a state inclined from the horizontal, and the locking tool is disposed so as to straddle the stepped portion, and the width of the blade is changed from the root portion to the tip of the wing portion. Even if the slats break near the root part during operation of the ceiling fan, it is The broken blades can be moored to the holding part to prevent falling, ensuring safety, the air flow and speed characteristics can be improved by the action of the step part, and the step part where stress is concentrated is easily damaged Therefore, by disposing the locking device in advance so as to straddle the stepped portion, even when the blade is broken, the locking device can reliably prevent the blade from falling, and the width of the blade can be reduced. By setting the same size from the root portion to the vicinity of the tip of the wing portion, cracks due to metal fatigue are less likely to occur at the root portion of the slats, and durability can be improved.

The ceiling fan according to claim 1 of the present invention includes a disk-shaped stator having a fixed shaft at the center, an annular rotor provided in the vicinity of the stator, and a peripheral edge of the rotor. A support frame to be fixed, and a plurality of metal blades detachably provided on the support frame. The blades have a root portion fixed to the support frame, and a blade extending from the root portion. Comprising a locking tool that has one end fixed to the support frame via the root portion and the other end locked to the wing portion, and the vane plate is provided between the root portion and the wing portion. some of the have inclined step portion to maintain the said wings in an inclined state from the horizontal, the locking member is arranged so as to cross the step portion, the width of the blade plate base portion To the vicinity of the tip of the wing part, and when the reaction force of air blowing is applied to the wing part by the air blowing operation, Since repeated stress concentrates in the immediate vicinity of the base of the plate, there is a possibility that the blade will break due to metal fatigue if it is used for a long period of time. As it is moored to the support frame, it can be prevented from falling, and as a ceiling fan, it can improve the characteristics of air volume and wind speed, and the action of the reaction force of the airfoil wings will cause repeated stress on the stepped parts of the blades, Since the stepped portion is the portion most easily broken, by disposing the locking portion so as to straddle the stepped portion, even if the blade plate breaks, the blade plate whose locking tool is broken is used to support the rotor support frame. It is moored to prevent falling, material removal of the slats is simple and reasonable, and the area of the root part is relatively larger than the wing part, so that cracks even if repeated loads are applied to the mounting part It can be said that it does not occur Having an iodine.

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

( Assumption example 1)
As shown in FIGS. 1 and 2, the motor of the ceiling fan includes a disk-shaped stator 2 having a fixed shaft 1 at the center and an annular rotor 3 provided in the vicinity of the periphery of the stator 2. And a support frame 4 that is fixed to the periphery of the rotor 3 and a plurality of metal blades 6 that are detachably provided on the support frame 4.

  The vane plate 6 includes a root portion 6a fixed to the support frame 4 and a wing portion 6b extending from the root portion 6a, and a locking tool 9 for connecting the root portion 6a and the wing portion 6b is attached. . The vane plate 6 has a stepped portion 6c that is inclined between the root portion 6a and the wing portion 6b, and the stepped portion 6c maintains the wing portion 6b inclined from the horizontal so that the wing plate 6 has a blowing function. It is something that demonstrates.

  Further, as shown in FIG. 6A, the step portion 6c has two curved portions 6r having different bending directions, and the bending angle of the curved portion 6r is an obtuse angle of 90 degrees or more.

  Further, the locking tool 9 is configured such that one end is fixed to the support frame 4 via the root portion 6a and the other end is locked to the wing portion 6b so as to straddle the step portion 6c.

  With the above configuration, when the ceiling fan is operated, when the air is blown from the ceiling toward the floor, a reaction force of the air blow is applied to the wing portion 6b of the blade plate 6 and is repeatedly applied to the nearest portion of the root portion 6a of the blade plate 6. Stress will be concentrated. Further, when used for a long period of time, there is a possibility that the vicinity of the root portion 6a of the blade plate 6 may break due to metal fatigue. Even in the event of a break, the blade plate 6 is fixed to the support frame 4 of the rotor 3 by the locking tool 9. It is moored so that it can be prevented from falling.

  Further, by forming the step portion 6c that supports the inclined wing portion 6b on the blade plate 6, it is possible to improve the characteristics of the air volume and the wind speed as a ceiling fan, and the action of the reaction force of the wing portion 6b that blows air Repeated stress is applied to the stepped portion 6c of the plate 6, and the stepped portion 6c becomes the most easily broken portion. Therefore, by disposing the locking tool 9 so as to straddle the stepped portion 6c, the vane plate 6 Even in the case of breakage, the vane plate 6 from which the locking tool 9 is broken can be moored to the support frame 4 of the rotor 3 to prevent the fall.

  Further, the stress generated through the wing portion 6b is concentrated at the bent portion of the stepped portion 6c, but by making the bending angle of the curved portion 6r an obtuse angle of 90 degrees or more, the stress is applied to the entire root portion 6a of the blade plate 6. As a result, stress concentration on the stepped portion 6c can be relaxed, the blade plate 6 becomes difficult to break, and the durability of the blade plate itself can be improved.

( Reference Example 1 )
As shown in FIGS. 3 and 4, the slat 6 is provided with streak-shaped reinforcing ribs 6d that continue from the root portion 6a to the vicinity of the center of the wing portion 6b or the tip, but the cross-sectional shape is an arc having a large radius of curvature. It is good also as the reinforcing rib (arc shape) 6e made into the shape.

  Further, the airflow inlet side and the outlet side of the wing portion 6b are formed by flat portions, and the flat portions are provided so as to be on the same plane.

  With the above configuration, the streak-shaped reinforcing rib 6d minimizes the warp due to the weight of the metal blade 6 as much as possible, and reduces the deformation amount of the blade 6 during operation with respect to repeated upper and lower loads, to the step portion 6c and the like. Thus, the blade 6 is prevented from being easily broken. Further, by adopting a reinforcing rib (arc-shaped) 6e having an arc shape in cross section, the warp deformation and stress concentration of the blade plate 6 are extremely reduced, and the overall rigidity of the blade plate 6 is enhanced. The front and back surfaces of the plate 6 become smooth, and the airflow flows smoothly along the vane plate 6.

  Further, by configuring the airflow inlet side and outlet side of the wing portion 6b with flat portions, the rigidity is improved as compared with a blade plate whose overall cross-sectional shape is only an arc shape, and in the blade plate manufacturing stage. Since the dimensional shape of the blade plate processed by sheet metal can be reliably maintained, production and quality control can be performed efficiently.

(Embodiment 1 )
As shown in FIGS. 5 to 7, the width of the slat 6 is substantially the same from the root 6 a to the vicinity of the tip of the wing 6 b.

  Further, a reinforcing end portion 6g by beat processing or folding processing is provided at the end portion of the root portion 6a of the blade plate 6, and a plurality of projections 6h are provided in the root portion 6a, and a plurality of holes into which the projection portions 6h are fitted. The part 4 a is formed on the support frame 4. Further, the area of the root portion 6a is increased, and the attachment strength of the root portion 6a is increased.

  With the above configuration, the material of the slat 6 is simple and rational, and the area of the root portion 6a is relatively larger than that of the wing portion 6b, and cracks and the like occur even when a repeated load is applied to the mounting portion. I can not.

  Further, by applying beat processing or folding processing to the end portion of the root portion, the rigidity of the root portion 6a of the slats can be improved, and breakage from the root portion can be prevented, and the root portion 6a is more than the wing portion 6b. Even if the width is small, the strength can be maintained, and the root portion 6a can be designed to be slim.

  Further, by supporting the root portion 6a with a plurality of protruding portions 6h, the stress applied to the root portion 6a can be relieved, and by inserting the protruding portion 6h into the support frame 4 during assembly, it can be easily temporarily fixed. Can be attached.

  Further, by increasing the area of the root portion 6a, it is possible to prevent the stress from being concentrated on the attachment portion by increasing the area of the pressing margin of the root portion 6a.

Side view of the cross section of the main part of the ceiling fan of Assumption 1 Same external perspective view when assembling blades and locking devices External perspective view of the ceiling fan of Reference Example 1 when assembling the blades and locking devices The figure which shows the wing | blade provided with the circular arc-shaped reinforcement rib, and a locking tool ((a) The external appearance perspective view at the time of an assembly, (b) The cross-sectional view of a wing | blade board) FIG. 3 is an external perspective view of the ceiling fan according to the first embodiment of the present invention when the blades and the locking device are assembled. Same external perspective view when assembling blades and locking devices (A) Same as above, perspective view of external appearance at the time of assembling blades and locking tools, (b) Cross-sectional view of main parts at the time of assembling blade plates and support frames of ceiling fans according to Embodiments 1 and 3 of the present invention. (B) Side view of the cross section of the main part of a conventional ceiling fan,

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fixed shaft 2 Stator 3 Rotor 4 Support frame 4a Hole 6 Blade plate 6a Root part 6b Wing part 6c Step part 6d Reinforcement rib 6e Reinforcement rib (arc shape)
6f Plane part 6g Reinforcement end part 6h Projection part 6r Bending part 9 Locking tool

Claims (1)

A disk-shaped stator having a fixed shaft at the center, an annular rotor provided close to the periphery of the stator, a support frame fixed to the periphery of the rotor, and a detachable attachment to the support frame It has a plurality of metal blades that can be provided, and this blade plate is composed of a root part fixed to the support frame and a wing part extending from the root part, and one end is interposed through the root part. The wing plate includes a locking tool fixed to the support frame and having the other end locked to the wing portion, and the slat includes a portion between the root portion and the wing portion. It has an inclined stepped portion that maintains an inclined state, and the locking tool is arranged so as to straddle the stepped portion, and the width of the blade is the same from the root portion to the vicinity of the tip of the wing portion. Ceiling fan.

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