JP2579089B2 - Duct 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 ventilation fan for a duct, which is mainly mounted on a ceiling of a living room and is connected to a duct communicating with the outside to exchange air in the living room.

[0002]

2. Description of the Related Art Heretofore, the main body of this type of duct ventilation fan has generally been configured as shown in FIGS.
That is, a blower 106 provided with an electric motor 105 to which the blades 104 are fixed is disposed inside, and a box-shaped main body 101 having a suction port 102 on a lower surface and a discharge port 103 on one side surface includes:
The joining of the corner portion 107 is performed by connecting the adjacent side plates 108,
These side plates 108, 109
The protruding piece 110 extending on the same plane as the protruding piece 111 and the protruding piece 111 bent inward and extending are alternately provided in large numbers. It is provided by shifting the position one by one, inserting the protruding piece 110 of the side plate 108 or 109 between the protruding pieces 111 of the other side plate 109 or 108, and bending and crimping it to the other side plate side. Was.

[0003]

In such a conventional structure, the corner portion 107 of the box-shaped main body 101 is bent by inserting a number of projecting pieces 110 and 111 between the projecting pieces on the other side. Therefore, if the fitting at each protruding piece is not considerably loosened, some parts cannot be fitted. For this reason, when caulking, a large number of gaps are generated, which is a factor of wind leakage.

An object of the present invention is to solve such a problem, and it is a first object of the present invention to provide a ventilation fan for a duct which does not leak air at a corner portion of a main body.

A second object is to prevent the air from leaking at the corners of the main body and to improve the strength of the caulking.

[0006]

In order to achieve the first object, a first means of the present invention includes a blower which is inserted and installed in an opening in a ceiling surface and has a motor having a blade fixed thereto, A box-shaped main body having a suction port on the lower surface and a discharge port on one side has corners formed by two adjacent side plates, which are located at two upper and lower sides of a side end of one of the two side plates. A first protruding piece is provided on the same plane as the side plate, and a first bent piece is formed by bending inward between the protruding pieces and above and below, and the first side piece of the other side plate is provided with the first protruding piece. The second bent piece and the first bent piece are located at positions corresponding to the first projecting pieces.
And a second protruding piece is provided at a position corresponding to the bent piece, and the first protruding piece is inserted between the second protruding pieces, and the first and second protruding pieces are bent inward. This is a configuration of a duct ventilation fan formed by crimping and joining.

Further, a second means for achieving the second object is that a third portion is provided at the center of the first bent piece between the first projecting pieces.
And a third bent piece is provided at the position of the second projecting piece corresponding to the third projecting piece.
And a configuration in which a third protruding piece is inserted between the second protruding pieces, and the first, second, and third protruding pieces are bent inward and caulked to join the corners of the main body. It was done.

[0008]

According to the first aspect of the present invention, the first and second upper and lower first projecting pieces are inserted between the second projecting pieces in order to join the corner portions. Only, and even if the degree of fitting in each protruding piece is tight,
Since there is no place where fitting cannot be performed, the gap is extremely small, and it is possible to prevent air leakage.

Further, according to the configuration of the second means, since the third projecting piece caulks the central portion between the two upper and lower first projecting pieces, the joining force at the center of the corner becomes stronger, and the first projecting piece becomes stronger. There is almost no gap between the bent piece and the second protruding piece and the mating side plate at the overlapping portion, so that the gap at the corner portion is further reduced and the joining force is increased.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.

As shown in the figure, a main body 3 containing a blower provided with a motor 2 to which blades 1 are fixed is formed in a box shape, and has a suction port 4 on a lower surface and a discharge port 6 on a side plate 5. doing. The main body 1 is formed by bending a strip-shaped steel plate, joining the ends together at a corner 7 as described later to form a frame, and joining a top plate 8 to an upper portion of the frame. It is configured.

The corner 7 to be joined is configured as follows. Side plate 5 and side plate 9 adjacent thereto
Thus, the corner portion 7 is formed.
A first protruding piece (upper) 10a and a first protruding piece (lower) 10b are formed at the upper and lower two sides of the side end, at positions slightly apart from the upper and lower ends, in the same plane as the side plate 9. Above the first protruding piece (upper) 10a, below the first protruding piece (lower) 10b, and the first protruding piece (upper) 10b.
a, (lower) 10b are each bent inward by approximately 90 ° to form a first bent piece (upper) 11a and a first bent piece (lower) 1
1b and the first bent piece (medium) 11c.

On the other hand, when the side end of the side plate 5 abuts against the side end of the side plate 5, a first protruding piece (upper) 10a, a first protruding piece (lower) 10b, and a first protruding piece are provided. (Above) 11a,
First bent piece (lower) 11b, first bent piece (middle) 11c
The second bent piece (upper) 12a, the second bent piece (lower) 12b, the second protruding piece (upper) 13a, the second
, And a second protruding piece (middle) 13c.

The corner 7 is joined by connecting the first projecting piece (upper) 10a between the second projecting piece (upper) 13a and the second projecting piece (middle) 13c. (Bottom) 10b
To the second protruding piece (middle) 13c and the second protruding piece (lower) 13
b, the first projecting piece (upper) 10
a, (lower) 10b and second projecting piece (upper) 13a,
This is performed by bending the (lower) 13b and the (middle) 13c inward and overlapping and caulking the side plate 5 or the side plate 9. By this caulking, each bent piece 11a, 11
b, 12a, 12b, and 12c are in a state of being superimposed on the other side plate 5 or 9.

According to the above-described configuration, the first projection piece (upper) 10a and the second projection piece (lower) 10b are connected to the corner portion 7 by joining the second projection piece (upper). 13a
And the second protruding piece (middle) 13c and between the second protruding piece (middle) 13c and the second protruding piece (lower) 13b. Even if it is extremely tight, it does not cause a problem that a part that cannot be fitted appears, so that the gap in each fitting part is extremely small, and it is possible to prevent wind leakage.

Next, an embodiment of the present invention will be described with reference to FIGS. The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

This embodiment is a modification of the first embodiment.
A third protruding piece 14 is provided at the center of the bent piece (middle) 11c in the same plane as the side plate 9, and the position of the second protruding piece (middle) 13c corresponding to the third protruding piece 14 is provided. Is provided with a third bent piece 15 which is bent inward, and the first protruding pieces (upper) 10a, (lower) 10a and the third protruding piece 14 are connected to the second protruding pieces (upper) 13a, ( Lower) 13b, (middle) 13
c between each of the projecting pieces 10
The corners 7 are joined by bending inwardly a, 11b, 14, 13a, 13b, and 13c.

According to the above configuration, the first vertically wide first member is provided.
Bent piece (middle) 11c and second projecting piece (middle) 13c
Are divided into two in the vertical direction, and are caulked at the center of the divided corner portion 7, so that the joining force at this portion is increased, and the first bent piece (middle) is formed.
11c and the side plate 5 and the second protruding piece (middle) 13c and the side plate 9 are superimposed on each other in a more closely contacted state, so that there is almost no gap in this superimposed portion, and the prevention of wind leakage is eliminated, and the side plates 5, 9 or The joining of the corner portions 7 can sufficiently withstand the external force applied to the corner portions 7.

[0019]

As is apparent from the above description of the embodiment, according to the present invention, the joining of the corners of the main body is performed by using only two upper and lower projecting pieces formed on one side plate of two adjacent side plates. And a projecting piece formed at a position that does not correspond to the projecting piece formed on the other side plate is fitted between the mating sides, and each projecting piece is bent inward and overlapped on the mating side plate. Since it is performed by caulking, the degree of fitting at each fitting part can be quite tight, so the gap as a whole corner part is very small, providing a ventilation fan for ducts without wind leakage it can.

Further, even in the central portion of the corner portion, the third protruding piece is similarly inserted and bent and caulked by bending, so that even if a strong external force is applied to the side plate or the corner portion of the main body, the joining is sufficient. , And the generation of a gap at the center is eliminated, so that it is possible to more reliably prevent wind leakage.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a duct ventilation fan according to a first embodiment of the present invention.

FIG. 2 is a partial perspective view showing a side plate joint of the ventilation fan for the duct.

FIG. 3 is a perspective view showing a ventilation fan for a duct according to a second embodiment of the present invention.

FIG. 4 is a partial perspective view showing a joint portion of a side plate of the ventilation fan for the duct.

FIG. 5 is a perspective view of a conventional duct ventilation fan.

FIG. 6 is a partial perspective view showing a joint portion of a side plate of the ventilation fan for the duct.

[Explanation of symbols]

 Reference Signs List 1 blade 2 motor 3 main body 4 suction port 5, 9 side plate 6 discharge port 7 corner 10a first protruding piece (upper) 10b first protruding piece (lower) 11a first bent piece (upper) 11b first 11c 1st bent piece (middle) 12a 2nd bent piece (upper) 12b 2nd bent piece (lower) 13a 2nd projecting piece (upper) 13b 2nd Projecting piece (lower) 13c Second projecting piece (middle) 14 Third projecting piece 15 Third bent piece

Claims (2)

(57) [Claims] 1. A box-shaped main body having a built-in blower which is inserted and installed in an opening of a ceiling surface and has a motor to which blades are fixed, and which has a suction port on a lower surface and a discharge port on one side, is adjacent to the main body. Corner portions formed by the two side plates are provided with first projecting pieces on the same plane as the one side plate at two upper and lower side end portions of one of the two side plates, and between and above the projecting pieces. A first bent piece bent downward and inward is provided, and a second bent piece and the first bent piece are provided at positions corresponding to the first projecting pieces at the side end portions of the other side plate. A second projecting piece is provided at a position corresponding to the bent piece, and the first projecting piece is inserted between the second projecting pieces and the first and second projecting pieces are bent inward. Ventilation fan for ducts formed by joining by squeezing. 2. A third protruding piece is provided at a central portion of the first bent piece between the first protruding pieces, and a third protruding piece is provided at a position of the second protruding piece corresponding to the third protruding piece. And the first and third projecting pieces are inserted between the second projecting pieces, and the first, second, and third projecting pieces are bent inward and swaged. The ventilation fan for a duct according to claim 1, wherein a corner portion of the main body is joined by the (1).