WO2018220775A1

WO2018220775A1 - Ceiling fan

Info

Publication number: WO2018220775A1
Application number: PCT/JP2017/020366
Authority: WO
Inventors: 哲也福嶋
Original assignee: 三菱電機株式会社
Priority date: 2017-05-31
Filing date: 2017-05-31
Publication date: 2018-12-06
Also published as: JP6779378B2; JPWO2018220775A1

Abstract

This ceiling fan is installed suspended from a ceiling. The ceiling fan is provided with an electric motor, a support body that rotates by the driving of the electric motor, and a plurality of vanes (2). The plurality of vanes include vanes having a blade part (22) and a base part (21) nearer the rotational center than the blade part, and the blade parts are removably attached to the support body and supported on the support body. The support body is provided with fixing member receiving parts to which are fastened fixing members that fix the base parts to the support body. The base parts are each provided with through-holes (23, 24) through which the fixing members are passed. The through-holes each include a first hole part (25) in which a fixing member can be fastened, and a second hole part (26) that is joined to the first hole part on the side opposite from the rotational center, and that has a larger diameter than the first hole part.

Description

Ceiling fan

The present invention relates to a ceiling fan that is installed suspended from a ceiling.

In a ceiling fan that rotates a plurality of blades, each blade is detachably attached to a support that supports the plurality of blades.

Patent Document 1 discloses a ceiling fan including a frame-like support fixed to a rotor and a plurality of blades detachably attached to the support. In the configuration disclosed in Patent Document 1, the root portion of the blade is fixed to the support.

JP 2009-121243 A

In a general ceiling fan, a screw as a fixing member is used for fixing the base portion of the support. The root portion is fixed to the support body by tightening the screw passed through the through hole formed in the root portion to the screw receiving portion of the support body. When the diameter of the through hole is larger than the diameter of the screw, the position of the root portion relative to the support may change when the root portion is fixed by tightening the screw. For this reason, dispersion | variation may arise in the attachment position of the blade | wing in a support body. In addition, when the diameter of the through hole is the same as the diameter of the screw, it is difficult to determine the position of the root portion so that the position of the through hole matches the position of the screw receiving portion, and workability is deteriorated. Will be.

The present invention has been made in view of the above, and an object of the present invention is to obtain a ceiling fan that can suppress the displacement of the attachment position of the blades and can be attached to the blades by efficient work.

In order to solve the above-described problems and achieve the object, the ceiling fan according to the present invention is installed suspended from the ceiling. The ceiling fan includes an electric motor, a support that rotates by driving the electric motor, and a plurality of blades. The plurality of blades include a blade having a wing portion and a root portion closer to the rotation center than the wing portion, and the root portion is detachably attached to the support body and supported by the support body. The support is provided with a fixing member receiving portion to which a fixing member for fixing the root portion to the support is fastened. The root portion is provided with a through-hole through which the fixing member is passed. The through hole is connected to the first hole on the side opposite to the rotation center side and the first hole where the fixing member can be tightened, and has a diameter larger than the diameter of the first hole. A second hole.

The ceiling fan according to the present invention has an effect that the displacement of the attachment position of the blades can be suppressed and the blades can be mounted by efficient work.

The figure which shows the whole structure of the ceiling fan concerning embodiment of this invention Top view of the support shown in FIG. Top view of the blade shown in FIG. The figure which shows the through-hole shown in FIG. The 1st figure explaining the procedure which attaches a blade | wing to the support body shown in FIG. 2nd figure explaining the procedure which attaches a blade | wing to the support body shown in FIG. The figure which shows a mode when a screw is inserted in the 2nd hole part shown in FIG. The figure which shows a mode when a blade | wing is moved after a screw is passed through the through-hole shown in FIG.

Hereinafter, a ceiling fan according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment.
FIG. 1 is a diagram showing an overall configuration of a ceiling fan 1 according to an embodiment of the present invention. The ceiling fan 1 is installed suspended from the ceiling 8. The ceiling fan 1 includes a plurality of blades 2, an electric motor 3, and a support 4 that rotates by driving of the electric motor 3 and supports the plurality of blades 2.

In the example shown in FIG. 1, the ceiling fan 1 includes three blades 2. In FIG. 1, two of the three blades 2 are shown. In addition, the blade | wing 2 with which the ceiling fan 1 is provided may be more than three, or may be fewer than three.

Further, the ceiling fan 1 includes a connecting portion 5 that is a rod member for hanging from the ceiling 8. The upper end portion of the connecting portion 5 can be hung on a hanging portion 7 fixed to the ceiling 8. The connecting portion 5 is suspended downward from the suspension portion 7. In the example shown in FIG. 1, the central axis of the connecting portion 5 coincides with the rotation axis C. The electric motor 3 is provided below the connecting portion 5. Furthermore, the ceiling fan 1 includes a design cover 6 that covers a lower portion of the electric motor 3.

The support 4 is a disk member that is rotated by driving the electric motor 3, and is installed in the vicinity of the lower end of the connecting portion 5. The support 4 is provided so as to cover the upper part and the upper peripheral edge of the electric motor 3, and is connected to the rotor of the electric motor 3. In FIG. 1, the rotor is not shown.

The plurality of blades 2 rotate around the rotation axis C together with the support body 4 by driving the electric motor 3. The ceiling fan 1 generates an air flow by rotating a plurality of blades 2.

FIG. 2 is a top view of the support 4 shown in FIG. The support body 4 is provided with

screw receiving portions

11 and 12 that are fixing member receiving portions to which screws as fixing members are fastened. The support body 4 is provided with two

screw receiving portions

11 and 12 for each blade 2.

The support 4 is provided with a protrusion 13 for each blade 2. The protruding portion 13 is provided at a position closer to the rotation center than the combination of the screw receiving portion 11 and the screw receiving portion 12 for each blade 2. The connecting portion 5 is passed through the central portion of the support 4.

FIG. 3 is a top view of the blade 2 shown in FIG. FIG. 3 shows one of the plurality of blades 2 provided in the ceiling fan 1. In addition, the structure of one blade | wing 2 demonstrated below and the structure for the attachment to the support body 4 of the said blade | wing 2 shall be common to each blade | wing 2. FIG.

In FIG. 3 and subsequent figures, the X axis, the Y axis, and the Z axis are assumed to be three axes perpendicular to each other. The plus X direction in the X axis direction is a direction from the rotation axis C that is the rotation center of the plurality of blades 2 toward the centrifugal direction. The minus X direction is opposite to the plus X direction. The Z axis is an axis parallel to the rotation axis C. Among the Z-axis directions, the plus Z direction is a vertically upward direction. The minus Z direction is a vertically downward direction opposite to the plus Z direction. The plus Y direction in the Y-axis direction is a direction from bottom to top on the paper surface of FIG. The minus Y direction is opposite to the plus Y direction.

The blade 2 has a wing portion 22 and a root portion 21 on the minus X direction side that is the rotation center side from the wing portion 22. The root portion 21 is detachably attached to the support body 4 shown in FIG. Since the base portion 21 of each blade 2 is attached to the support body 4, the support body 4 supports each blade 2.

The base portion 21 is provided with two through

holes

23 and 24 through which screws as fixing members are passed. The positions of the two through

holes

23 and 24 correspond to the positions of the two

screw receiving portions

11 and 12, respectively.

The through hole 23 includes a first hole portion 25 that can be tightened with a screw as a fixing member, and a second hole portion 26 having a diameter larger than the diameter of the first hole portion 25. The second hole portion 26 is connected to the first hole portion 25 on the plus X direction side opposite to the rotation center side. Similar to the through hole 23, the through hole 24 includes a first hole portion 25 and a second hole portion 26.

FIG. 4 is a view showing the through hole 23 shown in FIG. The first hole portion 25 is an opening portion having a circular shape with a diameter D <b> 1 in the through hole 23. The second hole portion 26 is an opening portion having a circular shape with a diameter D <b> 2 in the through hole 23. The diameter D2 is larger than the diameter D1, and the relationship D1 <D2 is established. The through hole 23 is a long hole in which a first hole portion 25 and a second hole portion 26 having different diameters are connected to each other. A center line O passing through the center of the first hole 25 and the center of the second hole 26 is parallel to the X axis. The first hole portion 25 and the second hole portion 26 are connected to each other in the X-axis direction.

In the through hole 24 shown in FIG. 3, similarly to the through hole 23, the relationship of D1 <D2 is established. Further, the first hole portion 25 and the second hole portion 26 of the through hole 24 are connected to each other in the X-axis direction. In the through

holes

23 and 24 provided in the root portion 21, directions in which the first hole portion 25 and the second hole portion 26 are connected are parallel to each other.

As shown in FIG. 3, the two through-

holes

23 and 24 are provided at asymmetric positions with respect to the central axis N of the blade 2 parallel to the X-axis from the rotation axis C, which is the rotation center, to the centrifugal direction. In other words, with respect to the central axis N, the other through hole 24 is provided at a position other than the position symmetrical with the position of the one through hole 23.

Thus, by making the positions of the two through

holes

23 and 24 asymmetric with each other, the state in which the vertical direction of the blade 2 is in the correct mounting direction and the state in which the correct mounting direction is opposite are obtained. It can be easily identified.

In addition, it is not restricted to the case where the through-

holes

23 and 24 provided in the root part 21 are two. There may be more than two through holes provided in the root portion 21. Also in this case, each through hole includes a first hole portion 25 and a second hole portion 26, similarly to the through

holes

23 and 24. Further, each through hole is provided at an asymmetric position with respect to the central axis N.

Next, a method for attaching the blade 2 to the support 4 will be described. FIG. 5 is a first diagram illustrating a procedure for mounting the blade 2 to the support 4 shown in FIG. The blade 2 is positioned so that the positions of the second hole portions 26 of the two through

holes

23 and 24 are aligned with the positions of the two

screw receiving portions

11 and 12, respectively. A screw 27 as a fixing member is inserted into the second hole portion 26 of each of the two through

holes

23 and 24, and the tip of the screw 27 is screwed into the

screw receiving portions

11 and 12. Is temporarily fixed.

In the temporary fixing, a gap larger than the thickness of the root portion 21 is left between the head of the screw 27 and the support 4. The root portion 21 is not fixed by the head of the screw 27 and the support 4, and can be moved within a range in which the state where the screw 27 is passed through the through

holes

23 and 24 is maintained. In each of the two through

holes

23 and 24, since the direction in which the first hole 25 and the second hole 26 are connected is the X-axis direction, the blade 2 is moved in the X-axis direction. Can do.

FIG. 6 is a second diagram for explaining the procedure for mounting the blades 2 on the support 4 shown in FIG. As shown in FIG. 5, the blade 2 is moved in the plus X direction from the state where the screw 27 is passed through the second hole 26. By moving the blade 2 in the plus X direction, the second hole 26 moves from the position of the screw 27 and the first hole 25 moves to the position of the screw 27 in the two through

holes

23 and 24. To do.

The screw 27 is fitted into the first hole 25. After the screw 27 is fitted in the first hole portion 25, the root portion 21 is fixed to the support body 4 by tightening the screw 27 to the first hole portion 25 and the

screw receiving portions

11 and 12. In this way, the blade 2 is attached to the support 4.

The diameter D2 of the second hole portion 26 shown in FIG. When the base portion 21 is temporarily fixed, the screw 27 can be easily passed through the through

holes

23 and 24 by allowing the screw 27 to pass through the second hole portion 26 having a large diameter. Thereby, compared with the case where the through-

holes

23 and 24 consist only of a hole part with the diameter same as the diameter of the axial part of the screw 27, the blade | wing 2 can be mounted | worn by an efficient operation | work.

Further, the diameter D1 of the first hole portion 25 is the same as the diameter of the shaft portion of the screw 27. In tightening after temporary fixing, the screw 27 is fitted into the first hole 25, so that the position of the root portion 21 with respect to the support 4 can be stabilized. Thereby, compared with the case where the through-

holes

23 and 24 consist only of a hole part with a diameter larger than the diameter of the screw 27, the shift | offset | difference of the attachment position of the blade | wing 2 can be suppressed. By suppressing the displacement of the attachment position of the blade 2, the vibration of the blade 2 during operation of the ceiling fan 1 can be reduced.

The through-

holes

23 and 24 have the effect that the displacement of the attachment position of the blade 2 can be suppressed by having both the first hole portion 25 that functions as a tightening hole and the second hole portion 26 that functions as a desorption hole, The effect that the blade | wing 2 can be mounted | worn by an efficient operation | work can be acquired. In addition, since the positions of the two through

holes

23 and 24 in the root portion 21 are asymmetric to each other, and the direction of the blade 2 can be easily distinguished, it is possible to suppress the blade 2 from being attached upside down. Since such an effect can be obtained without adding additional components to the blade 2, the ceiling fan 1 can realize the effect with an inexpensive configuration.

FIG. 7 is a view showing a state when the screw 27 is inserted into the second hole portion 26 shown in FIG. In FIG. 7, a cross section of a portion of the root portion 21 where the second hole portion 26 is provided and a screw 27 below the second hole portion 26 are shown. The cross section of the root portion 21 shown in FIG. 7 is a cross section parallel to the Y axis and the Z axis.

The diameter D2 of the second hole 26 in the first surface 31 that is the surface on the plus Z direction side of the root portion 21 is larger than the diameter D4 of the head 33 of the screw 27. Moreover, the diameter D3 of the 2nd hole 26 in the 2nd surface 32 which is a surface on the back side of the 1st surface 31 among the root parts 21 is larger than the diameter D2. The second hole portion 26 has a conical surface whose diameter gradually increases from the first surface 31 toward the minus Z direction.

Before the screw 27 is inserted into the second hole portion 26, the lower end side portion of the shaft portion 34 of the screw 27 is inserted into the

screw receiving portions

11 and 12, and is temporarily fixed to the support body 4. The head 33 of the screw 27 is inserted into the second hole 26 from the second surface 32 side with the second surface 32 facing the support 4. The screw 27 inserted into the second hole 26 is passed to the first surface 31 side.

By making the diameter D2 of the second hole portion 26 larger than the diameter D4 of the head portion 33, the screw 27 temporarily fixed to the support body 4 can be passed through the second hole portion 26 from the second surface 32 side. It becomes. Compared with the case where the shaft portion 34 is inserted into the

screw receiving portions

11 and 12 after the shaft portion 34 of the screw 27 is passed through the second hole 26 from the first surface 31 side, the screw 27 is temporarily fixed. It becomes unnecessary to insert the screw 27 while pressing the root portion 21 against the support 4. Thereby, the operation | work for mounting | wearing with the blade | wing 2 can be made efficient.

In addition, since the diameter D3 of the second hole portion 26 in the second surface 32 is larger than the diameter D2 of the second hole portion 26 in the first surface 31, the head 33 of the screw 27 can be easily attached to the second surface 32. It can be inserted into the hole 26. Thereby, the operation | work for mounting | wearing with the blade | wing 2 can be improved further.

FIG. 8 is a view showing a state when the blade 2 is moved after the screw 27 is passed through the through hole 23 shown in FIG. FIG. 8 shows a cross section of a portion of the root portion 21 where the through hole 23 is provided, and a screw 27 through which the through hole 23 is passed. The cross section of the root portion 21 shown in FIG. 8 is a cross section parallel to the X axis and the Z axis.

The protrusion 13 is provided on the support body 4 at a position closer to the rotation center than the

screw receiving portions

11 and 12 so that the root portion 21 can come into contact therewith. The protrusion 13 includes an inclined surface 36 that forms a downward gradient from the center of rotation toward the plus X direction, which is the centrifugal direction.

As the screw 27 is tightened, the end portion 35 on the rotation center side of the root portion 21 moves downward while being in contact with the inclined surface 36, whereby the root portion 21 is pushed in the plus X direction. Simultaneously with the tightening of the screw 27 by the operator, the blade 2 can be moved regardless of the operator's consciousness. Thereby, the operation | work for mounting | wearing with the blade | wing 2 can be improved further. Moreover, since the base part 21 can be fixed simultaneously with moving the base part 21 to the defined position, the shift | offset | difference of the attachment position of the blade | wing 2 can further be suppressed.

According to the embodiment, the ceiling fan 1 has the through

holes

23 and 24 including the first hole portion 25 and the second hole portion 26 provided in the root portion 21, thereby allowing the ceiling fan 1 to pass through the second hole portion 26. Then, the screw 27 moved to the first hole 25 is tightened in the first hole 25. By allowing the screw 27 to pass through the second hole 26, the blade 2 can be mounted by an efficient work. Further, since the screw 27 is tightened in the first hole portion 25, it is possible to suppress the displacement of the attachment position of the blade 2. Thereby, the ceiling fan 1 has the effect that the attachment position of the blade | wing 2 can be suppressed and the blade | wing 2 can be mounted | worn by an efficient operation | work.

The configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

DESCRIPTION OF SYMBOLS 1 Ceiling fan, 2 blades, 3 motors, 4 support body, 5 connection part, 6 design cover, 7 suspension part, 8 ceiling, 11, 12 screw receiving part, 13 protrusion part, 21 root part, 22 wing part, 23, 24 through hole, 25 first hole, 26 second hole, 27 screw, 31 first surface, 32 second surface, 33 head, 34 shaft, 35 end, 36 inclined surface, C rotating shaft , N center axis, O center line.

Claims

A ceiling fan that is installed suspended from the ceiling,
An electric motor,
A support that rotates by driving the electric motor;
Including a blade having a wing portion and a root portion closer to the rotation center than the wing portion, and a plurality of blades that are detachably attached to the support body and supported by the support body,
The support body is provided with a fixing member receiving portion to which a fixing member for fixing the root portion to the support body is fastened,
The root portion is provided with a through hole through which the fixing member is passed.
The through hole is
A first hole capable of tightening the fixing member;
A ceiling fan comprising: a second hole portion connected to the first hole portion on a side opposite to the rotation center side and having a diameter larger than a diameter of the first hole portion.
Two fixing member receiving portions are provided per blade,
The root portion includes two through holes corresponding to the two fixing member receiving portions,
2. The ceiling fan according to claim 1, wherein the two through holes are provided at positions that are asymmetric with respect to a central axis of the blade toward the centrifugal direction from the rotation center.
The ceiling fan according to claim 2, wherein a center line passing through the center of the first hole and the center of the second hole in each through hole is parallel.
The ceiling fan according to any one of claims 1 to 3, wherein a diameter of the second hole portion is larger than a diameter of a head portion of a screw that is the fixing member.
The diameter of the second hole in the first surface of the root portion is larger than the diameter of the head,
The diameter of the second hole in the second surface, which is the surface on the back side of the first surface of the root portion and is the surface facing the support, is the diameter of the second hole in the first surface. The ceiling fan according to claim 4, wherein the ceiling fan is larger than the diameter.
A protrusion provided at a position closer to the rotation center than the fixing member receiving portion and capable of contacting the root portion;
The ceiling fan according to any one of claims 1 to 5, wherein the protrusion includes an inclined surface that is inclined downward from the rotation center side toward the centrifugal direction.