JP2952308B2 - Blower casing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin casing for a blower (blower), and more particularly to a blower casing formed by connecting a half-cut casing member integrally formed of a synthetic resin material. It is about.

[0002]

2. Description of the Related Art Conventionally, a blower casing of this type is generally formed as shown in FIG.
As shown in the figure, from the cylindrical outer peripheral wall (11) to the left and right side walls (12), (1)
3) is integrally bent to form a casing (10). The casing (10) is composed of an upper casing member (10a) and a lower casing member (10b) cut in half vertically, and the respective casing members (10a) and (10b)
Are integrally formed of a synthetic resin material.

[0003] Generally, in a thin synthetic resin molded product such as a casing, the thickness of each part is generally made uniform in order to reduce deformation due to cooling distortion after molding.
Even in the case of a conventional blower casing, the cylindrical outer peripheral wall (1
The thickness of each part including 1) and the left and right side walls (12) and (13) is formed uniformly.

However, as shown in FIG. 6, the casing taken out of the mold after molding has the left and right side walls (12) and (13) deformed varus with respect to the outer peripheral wall (11) by α degrees smaller than 90 degrees. Therefore, conventionally, as shown in FIG. 7, the left and right side walls are widened by an angle β in consideration of the amount of deformation.

[0005]

Since the angle β is set while repeating the test molding when producing the mold, the production cost of the mold is high and the resin material to be molded is slightly changed. However, there is a problem that products are apt to be scattered due to slight influence.

Accordingly, the present invention provides a casing having a configuration in which deformation due to distortion does not occur between the outer peripheral wall and the left and right side walls even after molding, thereby reducing the manufacturing cost of the mold. The main purpose is to achieve product uniformity.

[0007]

In order to achieve the above object, the present invention takes the following technical measures. That is, in the blower casing according to the present invention, the cylindrical outer peripheral wall (2) and the right and left side walls (3), (4) formed by being bent at a right angle integrally from the outer peripheral wall (2). And a blower port (5) formed in the outer peripheral wall (2), and a blower in which openings (3a) and (4a) are formed in the center of the left and right side walls (3) and (4). Casing (1), wherein the casing (1) is an upper casing member (1a) and a lower casing member cut in half vertically.
(1b), each casing member (1a),
(1b) is integrally formed of a synthetic resin material,
Furthermore, the outer peripheral wall (2) and the left and right side walls of each casing member (1a), (1b)
The thickness of the corner portion (6) connecting (3) and (4) is formed to be about half the thickness of the other portions.

[0008]

[Function] In the casing (1) configured as described above, the thickness of the corner portion (6) connecting the outer peripheral wall (2) and the left and right side walls (3) and (4) is the thickness of the other portions. Since the casing is formed to be about half the thickness, when the casing is pulled out from the mold and cooled to room temperature, the casing is not affected by the distortion between the outer peripheral wall and the left and right side walls. Thus, deformation after molding can be eliminated.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below based on an embodiment shown in the drawings. FIGS. 1 to 3 show an embodiment of the casing of the present invention. The casing (1) is integrally bent at a right angle from a cylindrical outer peripheral wall (2) and the outer peripheral wall (2). And the left and right side walls (3) and (4) formed as described above, and a square tubular air outlet (5) formed in the outer peripheral wall (2). In the present embodiment, the air outlet (5) is formed integrally with the outer peripheral wall (2).
You may make it join to (2).

The left and right side walls (3) and (4) have openings (3a) and (4a) formed in the center thereof, and one of the openings (3a) is formed.
Functions as a suction port, and a motor (7) is attached to the other opening (4a) as shown in FIG. Opening (3
a), ring-shaped concave portions for reinforcement (3b), (4b)
Is provided.

The casing (1) is composed of an upper casing member (1a) and a lower casing member (1b) cut in half vertically, and the respective casing members (1a) and (1b) are integrally formed of a synthetic resin material. It is molded into. Further, the thickness of the corner portion (6) connecting the outer peripheral wall (2) of each casing member (1a) and (1b) with the left and right side walls (3) and (4) is about 2 times that of the other portions.
It is formed to be one-thin thinner. In the present embodiment, the thin corner portion (6) is formed as an inclined surface, but may be formed as a curved surface as shown in FIGS.

Although the embodiments which are considered to be representative of the present invention have been described above, the present invention is not necessarily limited to only the structures of the embodiments, but includes the constituent elements thereof.
In addition, the present invention achieves the object of the present invention and can be appropriately modified and implemented within a range in which the following effects are obtained.

[0013]

The casing (1) constructed as described above
In this case, the thickness of the corner portion (6) connecting the outer peripheral wall (2) and the left and right side walls (3) and (4) is formed to be about half the thickness of the other portions. Therefore, after being pulled out of the mold, the outer peripheral wall and the left and right side walls do not interfere with each other due to distortion, thereby preventing deformation of the casing after molding. In addition, it is possible to reduce the cost of the mold by making it possible to produce it in one shot as per the design drawings, and to prevent the occurrence of variations in the product due to the change of the molding resin material. Has a noticeable effect.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a casing according to the present invention.

FIG. 2 is a sectional view taken along the line AA in FIG. 1;

FIG. 3 is a sectional view taken along the line BB in FIG. 2;

FIG. 4 shows another embodiment of the casing according to the present invention.
FIG.

FIG. 5 is an enlarged cross-sectional view of a part showing still another embodiment of the casing according to the present invention.

FIG. 6 is a sectional view showing a modified state of the conventional example.

FIG. 7 is a cross-sectional view showing a state immediately after molding in a conventional example.

[Description of Signs] (1) Casing (1a) Upper casing member (1b) Lower casing member (2) Outer peripheral wall (3) Side wall (3a) Opening (4) Side wall (4a) Opening (5) Ventilation port ( 6) Corner

Claims (1)

(57) [Claims] 1. A cylindrical outer peripheral wall (2), left and right side walls (3) formed by being bent at a right angle integrally from the outer peripheral wall (2),
(4) and an air outlet (5) formed in the outer peripheral wall (2), and openings (3a) and (4a) are formed in the center of the left and right side walls (3) and (4). A blower casing (1), wherein the casing (1) is constituted by an upper casing member (1a) and a lower casing member (1b) cut in half vertically.
Each of the casing members (1a) and (1b) is integrally formed of a synthetic resin material, and further, each casing member (1
The thickness of the corner part (6) connecting the outer peripheral wall (2) of (a) and (1b) with the left and right side walls (3) and (4) is about half the thickness of the other parts. The blower casing that is formed.