JP3202876B2 - Ceiling ventilation fan - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling fan having a lower casing accommodated in an outer casing and a metal upper casing provided on a top plate of the outer casing.

[0002]

2. Description of the Related Art A conventional structure of this type of ceiling fan will be described with reference to FIGS. First, in FIG. 8, the upper casing 1a is formed by drawing an iron plate in a state where the right end face is extended from the normal position, and then cutting the right end face from the normal position, as indicated by a two-dot chain line α. And is welded to the top plate of the main body case 2 as shown in FIG.

[0003] A lower casing 1b is accommodated in the main body case 2, and the casing 1 is composed of the lower casing 1b and the upper casing 1a. A fan device is housed in the casing 1,
When the fan device operates, air is sucked into the casing 1 from an opening of the ceiling plate through an air inlet formed on the lower surface of the main body case 2.

[0004] The exhaust port body 3 is composed of a mounting plate 3a (see FIG. 8) abutting against the right end surface (cut surface) of the upper casing 1a and a side plate of the main body case 2, and an exhaust tube 3b welded to the mounting plate 3a. The exhaust pipe is connected to the exhaust pipe 3b. The air sucked into the casing 1 is supplied to the side plate of the main body case 2 and the upper casing 1.
a through the exhaust port 4 formed by joining with the exhaust pipe 3
b and discharged outside through the exhaust duct.

[0005]

However, in the prior art, the cut surface of the upper casing 1a is abutted against the mounting plate 3a.
There is a risk that a gap may be formed at the abutting surface with a, and air may leak from the gap as shown by an arrow A in FIG.
For this reason, there is a fear that the ventilation capacity of the ceiling ventilation fan may be reduced, and that moisture may leak from behind the ceiling and shorten the life of the building.

Therefore, as shown in FIG. 11, an outer flange portion 1c which is bent outward is formed on the upper casing 1a, and the outer flange portion 1c and the mounting plate 3a are butted in a surface contact state. Is being done. However, in the case of this configuration, when forming the outer flange portion 1c,
As shown by a two-dot chain line α in FIG. 10, after the upper casing 1a is drawn in a state where the right end face is extended from the normal position, the extended portion needs to be bent outward.

For this reason, as shown in FIG. 11, a "wrinkle a" is generated in the outer flange portion 1c at the time of bending, and a gap is formed when the outer flange portion 1c and the mounting plate 3a abut. There was something. In particular, when the shape of the opening 1d of the upper casing 1a is made substantially square and the opening area of the exhaust port 4 is increased, the occurrence of "wrinkle a" becomes remarkable,
Problems such as a decrease in ventilation capacity and a shortened life of the building cannot be sufficiently solved.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to prevent problems such as preventing air leakage, reducing ventilation capacity, and shortening the life of a building due to moisture leaking above the ceiling. It is to provide a ceiling fan that can be eliminated.

[0009]

According to the present invention, there is provided a ceiling fan according to the present invention, comprising: an outer casing disposed behind a ceiling of a room; a lower casing accommodated in the outer casing; and a top plate of the outer casing. The provided metal upper casing, an inner flange portion integrally formed at a discharge port end of the upper casing, and bent to the inside of the upper casing, a side plate of the outer casing, and the inner flange portion. An exhaust port formed by the joining of
An exhaust port body is connected to the side plate of the outer casing and the inner flange portion in surface contact with each other, and the upper casing has the inner flange portion positioned upward to enlarge the exhaust port. Bulging part bulging upward is integrally formed,
The lower surface opening of the bulging portion is closed by a rectifying member, and the inner surface of the upper casing is substantially flush with the opening of the connecting portion between the rectifying member and the exhaust port. Item 1).

In this case, the rectifying member may be formed integrally with the lower casing by a synthetic resin via a self-hinge portion, and may be folded on the self-hinge portion to be overlapped on the lower casing. . Further, an engagement portion may be formed on the lower casing, and the rectifying member may be formed with an engaged portion which is engaged with the engaging portion as the rectifying member is overlaid on the lower casing. 3).

[0011]

According to the first aspect of the present invention, the inwardly bent inner flange portion is integrally formed with the discharge port end of the upper casing, so that the metal plate is elongated when forming the inner flange portion. And as a result, "wrinkles"
Can be sufficiently suppressed. Therefore, if the exhaust port is connected to the inner flange in a surface-contact state, the gap between the inner flange and the exhaust is sufficiently reduced, thereby preventing air leakage. In addition, since the inner flange portion is located upward and the bulging portion bulging upward so as to enlarge the exhaust port is formed integrally with the upper casing, the inner flange portion bent inward becomes a ventilation resistance. Can be prevented. further,
Since the opening at the lower surface of the bulging portion is closed by the rectifying member, it is possible to prevent air from entering the bulging portion and generating a vortex or the like. In addition, since the inner surface of the upper casing and the connection opening of the rectifying member and the exhaust port are made substantially flush, the air flow is smooth.

According to the second aspect of the present invention, when the self-hinge portion is bent, the rectifying member is placed on the lower casing, and if the lower casing is housed in the outer casing in this state, the lower casing and the lower casing can be connected to each other. At the same time, the rectifying member can be assembled. According to the third aspect of the present invention, when the self hinge portion is bent, the engaged portion of the rectifying member is engaged with the engaging portion of the lower casing, and the rectifying member is maintained in a state of being overlapped on the lower casing. Is done. Accordingly, it is possible to prevent the rectifying member from bouncing from above the lower casing due to the restoring force of the self-hinge portion.

[0013]

1 to 4 show a first embodiment of the present invention.
It will be described based on. First, in FIG. 2, an opening 12 a is formed in a ceiling plate 12 of a room 11. A wooden mounting frame 14 is attached to the periphery of the opening 12 a so as to be located on the side of the ceiling 13, and a plurality of main body cases 15 corresponding to the outer casing according to claim 1 are mounted on the mounting frame 14. It is fixed by screws 16. The main body case 15 is formed by drawing an iron plate. An intake port 15a facing the inside of the room 11 is formed on the lower surface of the main body case 15 through an opening 12a of the ceiling plate 12, and an opening is formed on the right side surface. Fifteen
b (see FIG. 3).

An opening 15c is formed in the upper surface of the main body case 15, and an upper casing 17 whose lower surface is opened is welded to the periphery of the opening 15c. The upper casing 17 is formed by drawing an iron plate, and closes the opening 15c of the main body case 15 from above. Also,
A lower casing 18 made of synthetic resin and having an open upper surface is screwed to the inner surface of the main body case 15. The lower casing 18 constitutes a casing 19 together with the upper casing 17, has an intake port 18a on the lower surface thereof, and has an opening 18b corresponding to the opening 15b of the main body case 15 on the right side thereof. .

At the center of the upper casing 17, there is formed a motor mounting portion 17a which expands upward. The motor mounting portion 17a is formed integrally with the upper casing 17 when drawing the upper casing 17, and a fan motor 20a is mounted on the inner surface of the motor mounting portion 17a. The rotation shaft 20b of the fan motor 20a
Is equipped with a fan 20c, and the fan motor 2
When the fan 20c is operated and the fan 20c is rotated, the air in the room 11 flows from the opening 12a of the ceiling
5 and the intake port 1 of the lower casing 18
It is sucked into the casing 19 through 8a. Reference numeral 20 indicates a fan device including a fan motor 20a and a fan 20c.

As shown in FIG. 1, a bulging portion 17b bulging upward is formed on the right side of the upper casing 17, and the bulging portion 17b is bent inward at the right end (end of the discharge port). A curved inner flange portion 17c is formed. The bulging portion 17b and the inner flange portion 17c are formed integrally with the upper casing 17 when the upper casing 17 is drawn, and as shown by a two-dot chain line β in FIG. After drawing the iron plate in a more extended state, the molded product is cut from a regular position to obtain an inner flange portion 17c having a width dimension W.

The press die 21 shown in FIG. 4 is for cutting the molded product from a regular position to obtain an inner flange portion 17c, and includes a fixed die 21a for supporting the upper casing 17 from the inner surface and a fixed die 21a. And a movable mold 21b that cuts a molded product from a predetermined position in cooperation with the above.

As shown in FIG. 3, a substantially rectangular opening 17d is formed inside the inner flange 17c, and the opening 17d of the upper casing 17 and the opening 15b of the main body case 15 are joined together. An exhaust port 22 is formed. Then, with the operation of the motor 20a, the casing 19
The air sucked into the inside is discharged to the outside of the main body case 15 through the exhaust port 22.

As shown in FIG. 1, the mounting plate 23 is formed with an opening 23a corresponding to the exhaust port 22.
An exhaust pipe 24 is welded to the peripheral edge of “a”. The exhaust port body 2 according to claim 1, wherein the mounting plate 23 and the exhaust pipe 24 are provided.
In FIG. 2, when the mounting plate 23 is fixed to the mounting frame 14 with a plurality of screws 26, the mounting plate 23 comes into surface contact with the inner flange portion 17c of the upper casing 17 and the side plate of the main body case 15. The exhaust port 22 and the opening 23a of the mounting plate 23 and the exhaust pipe 24 communicate with each other. The exhaust pipe 24 is connected to an exhaust duct (not shown) communicating with the outside. Therefore,
The air discharged to the outside of the main body case 15 through the exhaust port 22 is discharged outside through the exhaust pipe 24 and the exhaust duct from the opening 23a of the mounting plate 23.

As shown in FIG. 3, the main body case 15 has
Two square holes 15d are formed with the upper casing 17 interposed therebetween. The rectifying plate 27 corresponding to the rectifying member according to the first aspect is made of a synthetic resin, and integrally has two engaging claws 27a. And the current plate 27
The engaging claws 27a, 27a of the
d, 15d, the engaging claws 27a, 27a
The current plate 27 is fixed to the main body case 15 by being hooked on the edges of 5d and 15d. Thereby, as shown in FIG.
The lower surface opening of the bulging portion 17 b is closed by the rectifying plate 27.

Further, the rectifying plate 27 integrally has two ribs 27b, and the engaging claws 27a of the rectifying plate 27
Is pushed into the square holes 15d, 15d of the main body case 15, 2
The ribs 27b contact the inner surface of the upper casing 17,
The engaging claws 27a are hooked on the peripheral portions of the square holes 15d, so that the inner surface of the upper casing 17 and the connection opening of the rectifying plate 27 and the exhaust port body 25 (the inner surface of the mounting plate 23) are substantially flush. It is configured to be.

As shown in FIG. 3, the current plate 27 includes
A square hole 27c (only one is shown) is formed below each engaging claw 27a. Therefore, when the current plate 27 is formed (the split direction of the forming die is the vertical direction), the engagement claws 27 are formed.
There is no undercut in the space below the a and 27a.

As shown in FIG. 2, a bridge 18c straddling the air inlet 18a is formed on the lower surface of the lower casing 18, and the bridges 18c receive and support the arms 28a of the torsion coil spring 28. . Also, makeup frame 2
9, a metal fitting 29a is screwed on the upper surface.
a is inserted into the annular portion 28b of the torsion coil spring 28. The decorative frame 29 is lifted by the expanding force of the arms 28a of the torsion coil spring 28, and
To cover the opening 12a of the ceiling plate 12 from the room 11 side. The decorative frame 29 has a plurality of intake holes 29b.
Is formed, and the air in the room 11 is
Of the decorative frame 29, the opening 12a of the ceiling plate 12 and the inlet 1
Aspirated through 5a.

According to the above embodiment, the inwardly bent inner flange portion 17b is formed integrally with the upper case 17, so that when the upper casing 17 is drawn, the iron plate hits the bottom of the mold and the upper casing 17 is pressed. As the ceiling portion is formed, the inner flange portion 17c is formed such that the iron plate is stretched while reducing its thickness. For this reason, even if the substantially rectangular opening 17 d is formed in the upper casing 17 to increase the opening area of the exhaust port 22, the beautiful inner flange 17 without “wrinkles” is formed.
c is formed. Therefore, it is possible to prevent a gap from being formed between the mounting plate 23 and the inner flange portion 17c, and as a result, air does not leak through the gap, so that the ventilation performance is reduced or moisture leaks into the ceiling space 13. Problems such as shortening the life of the building can be prevented.

Since the upper casing 17 is reinforced by the inner flange portion 17c, the rigidity of the upper casing 17 is improved as compared with the conventional case shown in FIGS. Further, since the end face of the upper casing 17 is bent inward, there is no possibility that the end face of the upper casing 17 may damage a finger, unlike the conventional case shown in FIGS.

Also, since the upwardly bulging portion 17b is formed integrally with the upper casing 17, the inner flange portion 17c is positioned upward and the exhaust port 22 is enlarged, so that it is bent inward. It is possible to prevent the inner flange portion 17c from becoming a ventilation resistance. Moreover, the bulging portion 17b
1 is closed by the rectifying plate 27, so that it is possible to prevent air from entering the bulging portion 17b and generating a vortex as shown by a two-dot chain line in FIG. Further, since the inner surface of the upper casing 17 and the connection opening of the flow regulating member 27 and the exhaust port body 25 are substantially flush with each other, the flow of air is smooth as shown by the solid line in FIG. Is greatly improved. An effect of about 2 dB has been experimentally confirmed.

The bulging portion 17b of the upper casing 17
Is closed by the rectifying plate 27, so that even if a crack or a crack occurs in the bulging portion 17b having a reduced thickness due to drawing, air leakage can be prevented. When the engaging claws 27a, 27a of the rectifying plate 27 are pushed into the square holes 15d, 15d of the main body case 15, the engaging claws 27a, 27a are hooked on the edges of the square holes 15d, 15d, and the rectifying plate 27 is moved. Since it is configured to be fixed to the main body case 15 with one touch, the workability of assembling the current plate 27 is improved.

The two ribs 27b of the current plate 27 abut against the inner surface of the upper casing 17, and the two engaging claws 27a
Is hooked on the peripheral portion of the square hole 15d so that the inner surface of the upper casing 17 and the connection opening of the rectifying plate 27 and the exhaust port body 25 are substantially flush with each other.
Can be easily positioned, and two ribs 2
7b improves the rigidity of the current plate 27. Further, since the rectangular holes 27c are formed in the current plate 27, it is possible to prevent the space below the engaging claw 27a from being undercut when the current plate 27 is formed, and the configuration of the forming die for forming the current plate 27 is achieved. Can be simplified.

Next, a second embodiment of the present invention will be described with reference to FIG. The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Hereinafter, only different members will be described. A current plate 27 is connected to the lower casing 18 by a thin self-hinge portion 30. The lower casing 18, the current plate 27, and the self-hinge portion 30 are integrally formed of synthetic resin. At the time of molding, the self-hinge portion 30 is bent as shown by a two-dot chain line in FIG. , Lower casing 1
8 and the current plate 27 are arranged side by side in the horizontal direction.
In this case, no engaging claws 27a are formed on the current plate 27.

According to the present embodiment, when the self-hinge portion 30 is bent, as shown by a solid line in FIG. 15, the current plate 27 between the inner surface of the bulging portion 17 b and the lower casing 18.
Is held down, and the inner surface of the upper casing 17 and the current plate 27
And the connection opening of the exhaust port body 25 are substantially flush with each other.
The current plate 27 is fixed. Therefore, the lower casing 18
At the same time, the current plate 27 can be assembled.
The assembly workability is improved. In addition, since the lower casing 18 and the current plate 27 are integrally formed, the cost can be reduced.

Next, a third embodiment of the present invention will be described with reference to FIGS.
It will be described based on. The same members as those in the second embodiment are denoted by the same reference numerals, and description thereof will be omitted. Hereinafter, only different members will be described. First, in FIG. 6, the lower casing 18 is formed with a square hole 18d corresponding to the engaging portion according to the third aspect, and the straightening plate 27 is engaged with the engaging portion corresponding to the engaged portion according to the third aspect. The claw 27d is integrally formed. When the lower casing 18 and the rectifying plate 27 are integrally formed (the split direction of the molding die is the vertical direction), the square hole 27e of the rectifying plate 27 is such that the space below the engaging claw 27d is undercut. It is for preventing.

According to the present embodiment, when the self-hinge portion 30 is bent, the engaging claws 27d of the current plate 27 are inserted into the square holes 18e of the lower casing 18, as shown by the solid lines in FIG. Then, the engaging claws 27d engage with the peripheral edge of the square hole 18e, and the rectifying plate 27 overlaps the lower casing 18, and
The current plate 27 is held in a temporarily fixed state. Therefore, if the lower casing 18 is screwed to the main body case 15 in this state, the rectifying plate 27 is pressed between the lower casing 18 and the bulging portion 17b, and the rectifying plate 27 is permanently fixed.

Therefore, the same effect as that of the second embodiment can be obtained. Of course, when the lower casing 18 is screwed to the main body case 15, the rectifying plate 27 is moved by the restoring force of the self-hinge part 30. Since it can be prevented from bouncing off from above, assembly workability is further improved.

In the first embodiment, the lower casing 18 and the rectifying plate 27 are formed separately, and in the second and third embodiments, the lower casing 18 and the rectifying plate 27 are self-hinged. Although the connection is made by the portion 30, the present invention is not limited to this. For example, the rectifying plate 27 is connected to the lower casing 18 in a state where the rectifying plate 27 is superimposed on the lower casing 18 (a state shown by a solid line in FIG. 5). The plate 27 may be integrally formed.

In this configuration, the lower casing 18 and the rectifying plate 27 are integrally formed, so that the cost can be reduced. The rectifying plate 27 can be assembled simultaneously with the lower casing 18, so that the assembling workability is improved. Although there is an advantage, as is apparent from FIG.
The space between the lower casing 7 and the lower casing 18 is undercut (the split direction of the forming die is the vertical direction), and a slide die for eliminating the undercut is required. In this regard, as in the second and third embodiments of the present invention, if the lower casing 18 and the rectifying plate 27 are connected by the self-hinge part 30, the undercut can be eliminated and the slide type can be eliminated, so that the design is simplified. This has the effect of increasing the degree of freedom and reducing costs.

In each of the first to third embodiments, the exhaust port 25 is constituted by the mounting plate 23 and the exhaust tube 24, and the mounting plate 23 is abutted against the inner flange portion 17c. However, the present invention is not limited to this. For example, the exhaust tube 24 is welded to the inner flange portion 17c and the side plate of the main body case 15, thereby connecting the exhaust tube 24 to the inner flange portion 17c in surface contact. It is good. In the case of this configuration, the exhaust pipe 24 corresponds to the exhaust port according to the first aspect.

In each of the first to third embodiments, the rectifying member is constituted by the rectifying plate 27. However, the present invention is not limited to this. For example, a block-shaped rectifying member may be provided on the bulging portion 17b. It may be configured to be embedded.

[0038]

As apparent from the above description, the ceiling fan of the present invention has the following excellent effects. According to the first aspect of the present invention, when forming the inner flange portion, generation of “wrinkles” can be suppressed, so that the gap between the inner flange portion and the exhaust port body is not sufficiently provided. For this reason, air leakage is prevented, and problems such as a decrease in ventilation capacity and a decrease in the service life of the building due to moisture leaking above the ceiling are prevented. In addition, it is possible to prevent the inner flange from becoming airflow resistant, prevent air from entering the lower surface opening of the bulging part and prevent eddy currents, etc., and smooth the air flow, greatly increasing ventilation capacity. To improve.

According to the second aspect of the present invention, the lower casing and the rectifying member can be integrally formed, so that the cost can be reduced. In addition, since the rectifying member can be assembled at the same time as the lower casing, the assembling workability is improved. Further, since the undercut can be eliminated and the slide type can be eliminated, the degree of freedom in design can be improved and the cost can be further reduced.

According to the third aspect of the present invention, the rectifying member can be held so as to overlap the lower casing.
The straightening member is prevented from rebounding from above the lower casing due to the restoring force of the self-hinge portion, and the assembling workability is further improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part showing a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing the entire configuration.

FIG. 3 is an exploded perspective view showing a main body case, a current plate, and an exhaust port body.

FIG. 4 is a longitudinal sectional view schematically showing a method of forming an upper casing.

FIG. 5 is a perspective view of a lower casing and a current plate showing a second embodiment of the present invention.

FIG. 6 is a perspective view of a molded state of a lower casing and a current plate showing a third embodiment of the present invention.

FIG. 7 is a diagram corresponding to FIG. 5;

FIG. 8 is a diagram corresponding to FIG. 1 showing a conventional example.

FIG. 9 is a perspective view showing a main body case and an exhaust port body.

FIG. 10 is a diagram corresponding to FIG. 1, showing another conventional example.

FIG. 11 is a diagram corresponding to FIG. 9;

[Explanation of symbols]

11 is a room, 13 is behind the ceiling, 15 is a main body case (outer case), 17 is an upper casing, 17b is a bulging portion, 17c
Is an inner flange portion, 18 is a lower casing, 22 is an exhaust port, 25 is an exhaust port body, 27 is a rectifying plate (rectifying member), 30
Denotes a self-hinge portion, 18d denotes a square hole (engaging portion), and 27d denotes an engaging claw (engaged portion).

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F24F 7/10 101 F24F 7/10 F24F 7/00

Claims (3)

(57) [Claims] 1. An outer casing disposed behind a ceiling of a room, a lower casing accommodated in the outer casing, a metal upper casing provided on a top plate of the outer casing, and the upper part An inner flange portion integrally formed at the end of the discharge port of the casing and bent inward; an exhaust port formed by joining a side plate of the outer casing to the inner flange portion; An exhaust port body that is connected to the side plate and the inner flange portion in a surface contact state, wherein the upper casing is configured such that the inner flange portion is positioned upward so that the exhaust port is enlarged. An inflatable bulging portion is integrally formed, and a lower surface opening of the bulging portion is closed by a rectifying member, and an inner surface of the upper casing and a connection portion opening of the rectifying member and the exhaust port body are substantially flush. A ventilation fan for ceilings, characterized in that: 2. The rectifying member is formed integrally with the lower casing by a synthetic resin via a self-hinge portion, and is configured to be overlapped on the lower casing by bending the self-hinge portion. 1. The ceiling fan according to 1. 3. An engaging portion is formed in the lower casing, and an engaged portion to be engaged with the engaging portion is formed on the rectifying member when the rectifying member is overlaid on the lower casing. The ceiling ventilation fan according to claim 2, wherein: