JP2003139087A - Electric fan - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric fan causing no crushing of a thread of a screw part for joining a base part of a column and a base when performing work for installing or removing the column to the base part. SOLUTION: When inserting the base part of this column into a column installing hole of the base as a cylindrical part in a lower part of the base part of the column, the cylindrical part is projected from the column installing hole, a female screw part is formed in an inner peripheral surface part of this cylindrical part, a male screw part is arranged in a fixing member for fastening this female screw part, and a protective rib is formed outside this male screw part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fan, and more particularly to a fan in which a stand portion can be separated into a base and a support.

[0002]

2. Description of the Related Art In recent years, a fan can be miniaturized so that a stand can be separated into a base and a support so that the fan can be easily transported and stored at a distribution stage, and can be easily stored by a user during the off-season. The one that was made is used.

As an electric fan capable of separating the stand portion into the base and the support in this way, for example, Japanese Patent Publication No. 3103
The one described in Japanese Patent No. 0164 is known. In this conventional fan, the insertion part (base part) at the lower end of the column is slightly larger in diameter.
Is provided, and a male screw portion is projectingly provided on a protective cover (bottom surface portion) at the lower end of the insertion portion. Then, the insertion portion is inserted into the fitting recess of the base, the male screw portion is projected downward from the bottom plate of the base, and the nut is fastened to the male screw portion to attach the support to the base.

[0004]

Therefore, in the conventional fan, the male screw portion protrudes when the strut alone is handled. Therefore, when the male screw portion is inadvertently struck on a solid object such as metal, the screw of the male screw portion is screwed. There was a risk that the mountain would be crushed and the fixing member could not be tightened.

The present invention has been made by paying attention to the problems existing in such conventional techniques. The purpose is to provide a fan that does not crush the threads of the screw part for connecting the base of the column to the base when the column is attached to or removed from the base. It is in.

[0006]

In order to achieve the above-mentioned object, the present invention attaches a fan portion to the upper end portion,
A base for fixing the pillar is formed at the lower end, the lower part of this base is a cylindrical part, and a pillar with an internal thread on the inner peripheral surface of this cylindrical part and a pillar mounting hole for inserting the base of the pillar Having a base formed so that the tubular portion projects from the column mounting hole when the column is inserted into the column mounting hole,
It has a male screw portion to be screwed into the female screw portion of the projecting tubular portion, and by fastening the male screw portion to the female screw portion, a fixing member for attaching the support to the base, the fixing member further comprises: On the outer peripheral side of the cylindrical portion in a state where the male screw portion is fastened to the female screw portion, there is provided an annular protective rib which is erected from the lower end position of the male screw portion in the axial direction of the male screw portion. Here, the tubular portion includes a tubular portion and a tubular portion lacking a part of the tubular portion, for example, a substantially C-shaped tubular portion.

According to this structure, even when the base of the column is strongly pressed against a solid object such as metal by some kind of bouncing, only the female screw is formed on the base, and the surface facing the outside is not formed. Since the threaded portion is not formed on the portion, the thread does not collapse. Further, in the fixing member having the male screw portion screwed to the female screw portion, since the protective rib is formed on the outer side of the male screw portion, it is possible to strongly hit a fixed object such as metal by dropping the fixing member. Even if something happens, there is little danger that the screw thread will collapse. Since the protective rib is formed on the outer peripheral side of the cylindrical portion in a state where the male screw portion is fastened to the female screw portion, the protection rib is formed so as to stand in the axial direction of the male screw portion from the lower end position of the male screw portion. There is no obstacle when tightening the fixing member.

Further, the wall thickness of the cylindrical portion formed with the female screw portion may be substantially equal to the space dimension between the male screw portion and the protective rib of the fixing member. According to this structure, since the protective rib reinforces the tubular portion formed with the female screw portion, it is possible to reduce the wall thickness of the tubular portion formed with the female screw portion, thereby reducing cost and weight. Can be achieved.

Further, the fixing member has a fixing rib that comes into contact with the base in a state where the male screw portion is fastened to the female screw portion, and the fixing rib is on the outer peripheral side of the protection rib and is the male screw. Is a ring-shaped rib that is erected from the lower end position of the portion in the axial direction of the male screw portion, and
The outer peripheral surface may have a non-slip shape. According to this structure, the fixing member can be fastened by grasping the fixing rib. Further, since the fixing ribs are formed on the outer peripheral side of the protective ribs, the diameter becomes large and the fixing member can be easily tightened.

Further, it is preferable that the protection rib is formed so that its upper end is located above the upper end of the male screw portion. According to this structure, protection of the male screw portion becomes more reliable. Further, when the male screw portion is screwed into the female screw portion, the protective rib covers the outer peripheral surface of the tubular portion forming the female screw portion prior to this screwing, so that the protective rib guides the screw. Can be fulfilled. Therefore, the male screw portion is not inclined to be forcibly screwed into the female screw portion, and the life of the male screw portion and the female screw portion is extended.

Further, the base of the support column has a bulging portion having a circular cross section and bulging downward at the bottom surface portion near the center of the cylindrical portion forming the female screw portion, and the bulging portion of the bulging portion. The height is substantially matched with the lower end surface of the fixing member, the fixing member has the male screw portion formed on the outer peripheral surface portion of the cylindrical portion, and the male screw portion is formed on the inner peripheral side lower end surface of the cylindrical portion. You may have a sealing plate part which close | closes the circumference | surroundings of a bulging part. According to this structure, a space for accommodating the play portion of the wiring in the fan from the connector accommodated in the base and the support to the fan motor or the like can be formed in the lower part of the support. Further, since the sealing plate portion is arranged below the support column, it is possible to prevent dust from entering the inside of the base 1.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments will be described below with reference to the drawings. FIG. 1 is an overall perspective view of an electric fan according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the electric fan as a whole, and FIG. 3 is a perspective view of the electric fan with a column attached to a base. FIG. 4 is a cross-sectional view around the base, FIG. 4 is a cross-sectional view around the base in a state where the support column is inserted into the support column mounting hole of the base and the fixing member is not tightened, and FIG. It is a bottom view of the pillar base,
FIG. 6 is a sectional view of a fixing member in the fan.

As shown in FIGS. 1 and 2, the fan according to the present embodiment has a base 1, a column 2 supported by the platform 1, and a fan unit attached to the upper end of the column 2. 3 and 3. Further, in FIGS. 1 and 2, reference numeral 4 denotes a base portion of the column 2. The base 4 constitutes a connecting portion with the base 1. Reference numeral 5 indicates an operation portion of this electric fan. Reference numeral 6 denotes a fixing member that is fastened to a female screw portion 31a, which will be described later, formed on the base portion of the column.

As shown in FIGS. 2 to 4, the base 1 has an upper surface portion 11 which is a member forming a decorative plate on the upper surface, and a bottom surface portion 12 in which an outer peripheral frame portion and a bottom surface portion are integrally formed. Consists of. A strut mounting hole 11a for receiving the base 4 of the strut 2 is formed at a position slightly rearward of the center of the upper surface portion 11 (where the operation portion 5 is on the front surface).

As shown in FIGS. 3 and 4, the column mounting hole 11a is formed by a cylindrical member that hangs from the top surface to the bottom surface portion 12 of the bottom surface. An annular groove 11b is formed on the upper surface portion 11 outside the column mounting hole 11a. In addition, at the lower end of the column mounting hole 11a,
The U-shaped groove 11c is formed in an annular shape.

The bottom surface portion 12 closes the lower opening of the top surface portion 11, but has a raised portion 12a formed by upwardly raising a portion including the lower surface corresponding to the column mounting hole 11a and its periphery. There is. The space below the raised portion 12a serves as a recess 12b for housing the fixing member 6. In addition, the pillar mounting hole 1 in the raised portion 12a
Below the 1a, a substantially D-shaped hole 12c which is slightly larger than a semi-circle.
Is formed (see FIG. 2), and the remaining portion below the column mounting hole 11a is closed by the raised portion 12a. The upper surface of the raised portion 12a is used as a mounting portion for the female connector 13a.

As shown in FIGS. 2 to 4, the base portion 4 of the column 2 has an upper surface portion 21 obtained by enlarging the lower end portion of a vertically standing pipe-shaped member 2a into a substantially trumpet shape, and below the upper surface portion 21. And a bottom portion 23 attached to the lower open end of the cylindrical portion 22.

A rib 21a extending downward is formed on the outer peripheral edge of the upper surface portion 21. The rib 21a is fitted into the annular groove 11b of the base 1 in a state where the support column 2 is coupled to the base 1.

The cylindrical portion 22 is formed to have an outer diameter so that it can be fitted into the column mounting hole 11a of the base 1. The length of the U-shaped groove 11 is such that the lower end of the cylindrical portion 22 is formed below the column mounting hole 11a.
It is dimensioned to be inserted into c. In addition, at the position above the female connector 13a, the female connector 13a
Is attached to the male connector 13b. Therefore, in order to secure a passage for passing the wiring to the female connectors 13a and 13b, the positions of the cylindrical portion 22 and the U-shaped groove 11c are slightly higher than the male connector 13b. Is formed so as to be located at.

The bottom surface portion 23 is joined to the top surface portion 21 and the cylindrical portion 22 by fastening a plurality of screws 25 to a plurality of screw seats 24 formed so as to hang down from the top surface portion 21. The cylindrical portion 22
An annular reinforcing rib 26 is formed so as to hang down from the top surface portion 21 on the inner peripheral side of the bottom surface portion 23 by means of the screw 25.
The bottom surface portion 23 is configured to abut the reinforcing ribs 26 in a state in which is coupled to the upper surface portion 21 and the cylindrical portion 22.

In the vicinity of the outer periphery of the bottom surface portion 23, a substantially C-shaped cylindrical portion 31 is formed which is partially cut off around the female connectors 13a and 13b of the bottom surface portion 23. A female screw portion 31 a is formed on the inner surface of 31. A bulging portion 32 bulging downward to the lower end surface of the fixing member 6 is provided at the center of the bottom surface portion 23. In addition, the inside of the bulging portion 32 is a male connector 13b.
It is used as a relief part for the wiring that connects the fan motor (not shown) with the fan motor.

The fixing member 6 has a cylindrical portion 62 which is erected from the flat portion 61, and a protective rib 63 which is erected in an annular shape so as to surround the outside of the cylindrical portion 62 at a constant distance from the cylindrical portion 62.
And a fixed rib 64 formed outside the protective rib 63, and these are connected to each other by the flat surface portion 61.

The cylindrical portion 62 has a male screw portion 62 on the outer peripheral surface.
a is formed. The male screw portion 62a is the female screw portion 31.
It is screwed to a. The protective rib 63 is formed such that its upper end is slightly higher than the upper end of the male screw portion 62a.
The fixed rib 64 is an annular rib that is provided on the outer peripheral side of the protective rib 63 and is inclined from the lower end position of the male screw portion 62a in the axial direction of the male screw portion 62a, and has an outer peripheral surface portion. It is formed in a wave shape. This corrugation is for facilitating manual gripping of the fixing member 6 and turning it,
It is formed so that it can exhibit a non-slip function. The fixing member 6 is provided inside the male screw portion 62a.
A sealing plate portion 61a that seals between the bulging portion 32 and the cylindrical portion 62 so as not to be opened to the outside when tightened to a.
Is provided.

The attachment of the support column to the base of the electric fan having the above construction is performed as follows. First, the support column 2 with the fan unit 3 attached in the form as shown in FIG. 2 is inserted into the support column mounting hole 11 a of the base 1 from above. At this time, by inserting the column 2, the male connector 13b attached to the column 2 side and the female connector 13a attached to the base 1 are coupled, and the rib 21a is inserted into the annular groove 11b of the base 1. Insert it. The state in which the support column 2 is inserted in this way is as shown in FIG.
The annular groove 11b receives the rib 21a, and thus the pillar 2
Supports the weight of. Further, the substantially C-shaped tubular portion 31 forming the female screw portion 31a projects downward from the column mounting hole 11a and the substantially D-shaped hole 12c. After inserting the base portion 4 of the column 2 into the column mounting hole 11a of the base 1 in this manner, the male screw portion 62a of the fixing member 6 is screwed into the female screw portion 31a and tightened. As a result, the column 2 is fixed to the base 1.

According to the present embodiment configured as described above, since the female screw portion 31a is formed on the base portion 4 of the support column 1 and the screw portion is not formed on the portion facing the outside, the screw is formed. The mountain never collapses. Further, in the fixing member 6 having the male screw portion 62a screwed to the female screw portion 31a, the protection rib 6 is provided outside the male screw portion 62a.
Since 3 is formed, even if the fixing member 6 is strongly hit against a fixed object such as a metal by dropping it, the screw thread is not crushed. Also, this protection rib 6
3 is provided on the outer peripheral side of the C-shaped tubular portion 31a in a state where the male screw portion 62a is fastened to the female screw portion 31a.
Since it is formed so as to stand in the axial direction of the male screw portion 62a from the lower end position of 2a, it does not become an obstacle when the fixing member 6 is tightened.

Further, in the base portion 4, the thickness of the substantially C-shaped tubular portion 31 having the female screw portion 31a formed therein and the fixing member 6 are provided.
Since the dimension of the space between the male screw portion 62a and the protective rib 63 in FIG.
It is possible to reinforce the substantially C-shaped tubular portion 31 in which a is formed. Therefore, the thickness of the substantially C-shaped tubular portion 31 can be reduced, and the cost and weight can be reduced.

On the outer side of the protection rib 63, there is provided a fixed rib 64 that comes into contact with the bottom surface of the base 1, and further, the fixed rib 6 is provided.
4 is on the outer peripheral side of the protection rib 63, and has a male screw portion 62a.
Is a ring-shaped rib which is erected from the lower end position of the male screw portion 62a in the axial direction of the male screw portion 62a, and the outer peripheral surface portion thereof is corrugated to prevent slippage. The fixing member 6 can be tightened by grasping. Further, since the fixing ribs 64 are formed on the outer peripheral side of the protection ribs 63, the diameter becomes large and the fastening of the fixing member 6 becomes easy.

Further, the upper end of the protective rib 63 has a male screw portion 62.
Since it is formed above the upper end of a, the male screw portion 62a is reliably protected. Also, the male screw part 62
When a is screwed into the female screw portion 31a, the protection rib 63 is prior to this screwing, and the cylindrical portion 2 in which the female screw portion 31a is formed.
Since it covers the outer peripheral surface portion of 2, the protection rib 63 can fulfill a guiding function for screwing. Therefore, the male screw portion 62a is prevented from being forcibly screwed by being inclined with respect to the female screw portion 31a.
Also, the life of the female screw portion 31a is extended.

The base portion 4 of the column 2 has a female screw portion 31a.
On the bottom portion near the center of the C-shaped tubular portion 31 forming
Since the bulging portion 32 having a circular cross section and bulging downward is provided, the connector 13a housed in the base 1 and the support column 2,
A space for accommodating the play of the wiring in the fan from 13b to the fan motor or the like is formed in the lower portion of the column 2. The base 4 of the column 2 has a bulging height of the bulging portion 32 that is substantially the same as the lower end surface of the fixing member 6.
Has a male screw portion 62a on the outer peripheral surface of the cylindrical portion 62, and has a sealing plate portion 61a for sealing the periphery of the bulging portion 32 on the lower end surface on the inner peripheral side of the cylindrical portion 62. It is possible to prevent dust from entering the inside of 1.

In the above embodiment, the female screw portion 31a
Is formed in the substantially C-shaped cylindrical portion 31, but the substantially C-shaped cylindrical portion 31 may be a circular cylindrical portion if there is no female connector 13a or male connector 13b. Of course.

[0031]

As described above, according to the present invention, since the base of the strut is only formed with the female screw portion, even if the strut base is applied to a solid object such as metal when the strut is handled, the strut It does not damage the thread of the threaded portion formed on the.
Further, although a male screw portion is formed on the fixing member, since this male screw portion is protected by the protection rib, this male screw portion is less likely to crush the screw thread. Further, since the protective rib is formed on the outer peripheral side of the cylindrical portion in a state where the male screw portion is fastened to the female screw portion, the protection rib is erected from the lower end position of the male screw portion in the axial direction of the male screw portion, There is no obstacle when tightening the fixing member.

[Brief description of drawings]

FIG. 1 is an overall perspective view of an electric fan according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the entire fan.

FIG. 3 is a cross-sectional view around the base in a state in which a column is attached to the base in the fan.

FIG. 4 is a cross-sectional view around the base in a state in which the support is inserted into the support mounting hole of the base and the fixing member is not tightened in the fan.

FIG. 5 is a bottom view of a column base of the fan.

FIG. 6 is a cross-sectional view of a fixing member portion in the fan.

[Explanation of symbols]

1 base 2 props 4 base 6 fixing members 11a Strut mounting hole 12 Bottom part 12a ridge 12b recess 12c D-shaped hole 13a female connector 13b male connector 22 Cylindrical part 23 Bottom part 31 (substantially C type) tubular part 31a female screw part 32 bulge 61a Sealing plate part 61 Plane 62 cylindrical part 63 Protective rib 62a male screw part 64 fixed rib

Continued front page    F-term (reference) 3H034 AA02 AA14 BB02 BB08 BB20                       CC03 CC07 DD01 DD30 EE05                       EE11 EE12 EE14

Claims (5)

[Claims] 1. A fan portion is attached to an upper end portion, a base portion for fixing a support is formed at a lower end portion, a lower portion of the base portion is a tubular portion, and an internal thread portion is formed on an inner peripheral surface of the tubular portion. A support and a support base mounting hole into which a base of the support support is inserted; when the support support is inserted into the support support mounting hole, the cylindrical portion is formed so as to protrude from the support support mounting hole; A fixing member for attaching a support to the base by fastening the male screw portion to the female screw portion of the cylindrical portion, and the fixing member further includes the male screw portion; An electric fan having an annular protection rib, which is erected from the lower end position of the male screw portion in the axial direction of the male screw portion, on the outer peripheral side of the cylindrical portion when the male screw portion is fastened to the female screw portion. 2. The electric fan according to claim 1, wherein the wall thickness of the tubular portion formed with the female screw portion and the space dimension between the male screw portion and the protective rib of the fixing member are substantially the same. 3. The fixing member has a fixing rib that comes into contact with the base in a state where the male screw portion is fastened to the female screw portion, the fixing rib being on an outer peripheral side of the protection rib, 3. The electric fan according to claim 1, wherein the fan is an annular rib that is erected from the lower end position of the male part in the axial direction of the male screw part, and the outer peripheral surface part thereof has a non-slip shape. 4. The protection rib is formed so that its upper end is located above the upper end of the male screw portion.
The described fan. 5. The base portion of the column has a bulging portion having a circular cross section and bulging downward at a bottom portion near the center of a cylindrical portion forming the female screw portion, and a bulging height of the bulging portion. Is substantially the same as the lower end surface of the fixing member, and the fixing member has the male screw portion formed on the outer peripheral surface portion of the cylindrical portion, and the expansion portion is formed on the inner peripheral side lower end surface of the cylindrical portion. It has a sealing plate part for sealing the periphery of the projecting part.
4. The electric fan according to any one of 4 above.