JPS63706B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wind direction adjusting device used in home appliances such as room coolers and air conditioners, and automobile ventilators, and a method for manufacturing the same.

A perspective view of an example of the wind direction adjusting device according to FIG. 1 is shown. In Figure 1, 1 is the frame (outer frame), 2 is the blade,
Reference numeral 3 denotes a shaft hole drilled in the side wall of the frame 1 on which the rotating shaft (not shown) of the blade 2 is mounted, and a plurality of blades 2 are formed into a rectangular frame composed of four walls. It is supported by one opposing wall 1A, 1B of 1, and the wind direction can be adjusted.

Conventionally, the method of manufacturing a wind direction adjustment device used for the above-mentioned purposes has been to use separate materials for the frame and the blades, that is, different resin molding materials that have different shrinkage rates and do not fuse together. There is a method in which a plurality of blades mounted on a frame are rotatable within the frame, and a sliding torque is generated between the blades and the frame (Japanese Patent Publication No. 54-26266, 53
-19372, Japanese Patent Application Laid-Open No. 1983-70627).

ABS resin is mainly used as the resin molding material for forming the frame, and polypropylene (PP) resin is mainly used as the resin molding material for the blades.

However, the drawbacks of the above method and the conventional airflow direction adjustment device obtained thereby are that the difference in melting point and shrinkage rate of these two materials is used, and in particular that the difference in shrinkage rate is used, and that the frame body is On the contrary, the fact that the products are made in one piece using the same resin molding material is a disadvantage, and limits the dimensions and size of the product.

This will be explained below with reference to FIGS. 1 to 5.

The conventional manufacturing method for the wind direction adjusting device using the above-mentioned different types of resin molding materials is a method in which the frame body and the blades are molded in two stages using separate molds (Tokuko Showa).
54-26266) and a method of simultaneous molding using a continuous mold (JP-A-53-19372, JP-A-57-
70627), but the drawbacks of the conventional wind direction adjusting device will be explained below according to the former individual molding method.

That is, according to this individual molding method, a frame (outer frame) as shown in Fig. 2 is first injection molded, and after cooling and solidifying (after the ABS resin shrinks), this frame is molded into the blade metal. The blade material, for example, PP resin, is inserted into a mold, and then the blade material, for example, PP resin, is injected to insert-mold the blade 2 as shown in FIG. A wind direction adjusting device as shown in FIG. 1 was manufactured.

At that time, the ABS resin that constitutes the frame 1 and the blade 2
The PP resin that constitutes the blade does not fuse with each other and has a different shrinkage rate, so as the PP resin shrinks during molding, a gap is created between the shaft 4 of the blade 2 and the shaft hole 3 provided in the frame 1. and can be rotated.

Further, the blade 2 is provided with a head portion 5 at the tip of the central blade 2 as shown in FIG. The blades 2 are connected as shown in FIG. 4 to prevent the blades 2 from coming off the frame 1.

In FIGS. 3 and 4, reference numeral 20 is a connector for the blade 2, and by moving the connector 20 or the blade 2, the wind direction can be adjusted.

In the above, the outer frame 1 is made of ABS resin with a shrinkage rate of about 5/1000 and within a certain range (preferably a fixed dimension) after being molded with ABS resin. .

Next, as mentioned above, this outer frame is inserted into a blade mold, PP resin is injected, and injection molding is performed using PP resin. When this PP resin is injection molded, the general shrinkage rate of PP resin is Shrinkage occurs after release from the mold at a rate of about 17/1000.

At this time, as shown in Figure 4, which is provided at one location in the center of the frame as described above, due to the slippage prevention mechanism part, the frame is The dimension Y is subtracted (pushed) inward at the center by an amount equivalent to the shrinkage allowance of the PP resin. As a result, the outer edge of the frame 1 is deformed as shown in FIG.

The degree of deformation due to shrinkage is Y′=Y−2δ 2δ=Y×17/1000 It is approximated by

The degree of this deformation becomes more pronounced as the frame body has a longer dimension Y (longer blades).

For example, if the length (Y) is about 50 m/m, the shrinkage margin will only be 50 x 17/1000 = 0.85 [m/m] (δ = 0.85/2 = 0.425 mm on one side). For example, the length is 200m/
If it exceeds 3.4 m/m, deformation due to shrinkage of 3.4 m/m or more will occur, causing problems in appearance, dimensions, and even in the operation of the blade.

Although this may be acceptable for practical use as a wind direction adjustment device for a device of the size used in automobiles, the size of the blades becomes larger for home appliances such as room coolers and air conditioners, and the frame size increases accordingly. The deformation of the structure will also become noticeable, which will cause problems in practical use.

Incidentally, the drawbacks of the above-mentioned conventional devices also apply to a wind direction adjusting device obtained by a method of simultaneous molding using a continuous mold.

The present invention aims to solve such problems and to provide a wind direction adjusting device and a method for manufacturing the same, which can widen the range of practical application to large-sized devices. Comprised of a frame body and a blade supported by the frame body, and the resin molding material of the four walls constituting the frame body has a shrinkage rate different from that of the resin molding material of the blades, and does not fuse with each other. In a wind direction adjusting device that can adjust the wind direction using different resin molding materials, the opposing wall of the frame parallel to the blades is formed of the same resin molding material as the blades, and the manufacturing method is as follows:
For example, the outer frame that is first molded is not made into a single piece with four peripheral walls, but is divided into parts, and only the side with the blade support shaft is molded with ABS resin, and the remaining two sides are formed at the same time when molding the blades. It's about doing.

As a result, when the PP resin blade contracts, the two sides of the outer frame parallel to the blade also contract, so no matter how long the dimension Y of the outer frame becomes, deformation will not occur. do not have. Of course, it is possible to prevent the operation force from being affected.

Figure 6 shows an exploded view of the wind direction adjusting device according to the present invention, in which a frame body 1 is parallel to PP resin blades 2.
The opposing walls 7, 7 of the outer frame are molded with the same resin molding material as the blade 2, such as PP resin, and the opposing walls 7, 7 of the outer frame parallel to the blades are molded in accordance with the contraction of the plurality of PP resin blades 2. 7 is also contracted, so that no matter how long the distance between the opposing walls 8, 8 that support the blades 2 of the outer frame, that is, the size of the dimension Y becomes, the frame 1 will not deform and the frame 1 of the blade 2 will not be deformed. This ensures smooth rotation within the handle and does not affect the operating force. Furthermore, in the wind direction adjustment device shown in Fig. 6, the first
The wind direction can be adjusted using a connector (not shown) similar to that shown in FIGS.

In the wind direction adjustment device of the present invention, only the opposing walls 8, 8 supporting the blades of the frame body 1 are injection molded in advance, and then the opposing walls 7, 8 of the frame body parallel to the blades 2,
In addition to the method of molding the blades 7 at the same time as the injection molding of the blades 2, a resin molding material (ABS resin) is used to form the opposing walls 8, 8 that support the blades of the frame 1 in one mold.
is injected from one injection cylinder, and the resin molding material (PP resin) that constitutes the blade 2 and the opposing walls 7, 7 is made.
Alternatively, a frame body consisting of opposing walls 8, 8 made of ABS resin and opposing walls 7, 7 made of PP resin may be molded in advance. The blades 2 may be injection molded onto this, or other appropriate changes may be made.What is important is that the material is a resin molding material that has a shrinkage rate different from that of the material of the frame 1 and does not fuse with each other. Therefore, a method is adopted in which the opposing walls 7, 7 are formed of the same resin molding material as the blade 2.

Other injection molding methods include
Publication No. 26266, Japanese Patent Application Laid-Open No. 1937-19372, and Japanese Patent Application Publication No. 1987-19372
The method described in Publication No. 57-70627 is adopted.

Opposing walls 8, 8 constituting the wind direction adjustment device of the present invention
A representative example of the material is the ABS resin exemplified above, but other synthetic resins such as high impact polystyrene, polyphenylene oxide, polycarbonate, polyacetal, and polyamide may also be used.

On the other hand, the materials for the blades 2 and the opposing walls 7, 7 are as follows:
In addition to the PP resin exemplified above as a representative example, examples of synthetic resins that can be combined with the material of the opposing walls 8, 8 include polyethylene, ethylene-vinyl acetate copolymer, and the like.

In the present invention, when the opposing walls 7, 7 are joined to the ends of the opposing walls 8, 8, a slippage prevention mechanism as shown in FIGS. 7A and 7B similar to that shown in FIG. Also, as shown in FIGS. 8A and 8B, the ends of the opposing walls 8, 8 are undercut 9.
and the opposing walls 8, 8 are the opposing walls 7, 7 parallel to the blades.
The blade 2 and the opposing wall 7,
7, since the opposing walls 7, 7 also contract in accordance with the contraction of the blades 2, the frame 1 does not deform.

According to the present invention, it is possible to obtain a large-sized wind direction adjustment device that does not cause deformation of the frame and does not cause any trouble in operation as described above. Fig. 8 shows an example of a wind direction adjustment device for a room cooler.

These are configured such that the dimension Y is, for example, 5 cm or more.

In FIGS. 9 and 10, the same components as those in the embodiment shown in FIG. 6 are designated by the same numbers, and their explanations will be omitted.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of the wind direction adjustment device, Fig. 2 is a perspective view of the frame, Fig. 3 is a perspective view of the blade, Fig. 4 is a sectional view illustrating the slippage prevention mechanism, and Fig. 5 is a perspective view of the frame. FIG. 6 is a plan view illustrating the drawbacks of the conventional device; FIG. 6 is a perspective view of the frame and blades showing an embodiment of the present invention; FIG.
The figure is a perspective view of the main part illustrating the joining type of the four corners of the frame, Fig. 7B is a cross-sectional view of the main part, Fig. 8A is a perspective view of the main part showing another example, and Fig. 8B is a cross-section of the main part. figure,
FIGS. 9 and 10 are perspective views showing other embodiments of the present invention. DESCRIPTION OF SYMBOLS 1... Frame body, 1A, 1B... Opposing wall which supports a blade|wing, 2... Blade, 3... Shaft hole, 4... Blade rotation axis, 5...
Head portion, 6... Hole, 7, 7... Opposing wall parallel to the blade, 8, 8... Opposing wall supporting the blade.

Claims (1)

[Scope of Claims] 1. Comprised of a frame consisting of four walls and wind direction guide vanes (hereinafter simply referred to as vanes) supported by the frame, and a resin molding material for the four walls constituting the frame. In a wind direction adjustment device that uses a different resin molding material that has a different shrinkage rate than the resin molding material of the blade and does not fuse with each other, the opposing wall of the frame parallel to the blade is the same as the blade. 1. A wind direction adjusting device, characterized in that it is formed from a resin molding material, and is configured so that an opposing wall of a frame parallel to the blades also contracts in accordance with the contraction of the blades. 2 A wind direction adjustment device comprising a frame forming four walls and vanes supported by the frame and made of different resin molding materials that have different shrinkage rates and do not fuse with each other. In the method for manufacturing the device, an opposing wall of the frame supporting the blade is injection molded using the same resin molding material, and the remaining opposing wall of the frame parallel to the blade is injection molded using the same resin molding material as the blade. A method of manufacturing a wind direction adjustment device. 3. A method of manufacturing a wind direction adjustment device according to claim 2, wherein only the opposing wall supporting the blades of the frame body is formed in advance, and the opposing wall of the frame body parallel to the blades is formed in advance. is formed at the same time as the blade.
A manufacturing method according to claim 2.