JP3477502B2 - Shutter valve structure of vehicle ventilator - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutter valve structure for opening and closing a ventilation path of a ventilator for indoor air conditioning of a vehicle.

[0002]

2. Description of the Related Art In a conventional shutter valve structure of this type, as disclosed in Japanese Utility Model Laid-Open No. 5-26542, a continuous groove portion is formed in a peripheral portion of a plate-shaped valve body. A rectangular ring-shaped sponge body having an outer shape larger than that of the valve body is mounted (fitted) in the groove portion and combined to form a seal portion made of the sponge body around the valve body.

When the shutter valve is rotated and the air passage formed by the case body is closed by the shutter valve, the upper, lower inner wall surface and left and right wall surfaces of the case body forming the air passage are formed. The seal portion contacts and maintains airtightness.

[0004]

However, in the above-mentioned conventional shutter valve structure, when the plate-shaped valve body is resin-molded, an undercut is formed almost all around the valve body. In addition, the molding die structure becomes complicated, and the rectangular ring-shaped sponge body that constitutes the seal portion cuts out the sponge sheet, which is the material, resulting in a loss of material. There was a problem that it would bring up.

Further, when the rectangular ring-shaped sponge body is simply fitted into the valve body, the seal end face may be loosened due to the bending of the long side portion, and the sealing performance may be lost with time. It must be added, and there is a problem that it is difficult to be compatible with the sealing property.

The present invention was made in view of the above problems, and an object of the present invention is to make it possible to easily and efficiently form a seal portion on a valve body, and It is an object of the present invention to provide a shutter valve structure for a vehicle ventilator that can streamline the manufacturing process and reduce the manufacturing cost.

[0007]

In order to achieve the above object, a shutter valve structure for a ventilator for a vehicle according to a first aspect of the present invention comprises a valve main body formed of a first resin and having a corner portion, A seal forming body which is molded with a second resin and is arranged in the peripheral portion of the valve body is integrally combined and coupled in a molding die, and a seal formed of the seal forming body in the peripheral portion of the valve body. And a discontinuous portion formed on at least a peripheral portion is provided at a corner portion of the seal portion corresponding to the corner portion.

With this structure, the seal portion can be easily and efficiently formed in the valve body, and the manufacturing process of the shutter valve can be rationalized to reduce the manufacturing cost.

Moreover, by providing a discontinuous portion at the corner portion of the seal portion corresponding to the corner portion,
It is possible to prevent deformation of the seal portion due to the difference in heat shrinkage characteristics of the resin material forming the valve body and the seal portion, and when the shutter valve is rotated and the shutter valve closes the ventilation passage formed by the case body. The ends of the elastic pieces of the seal portion divided by the discontinuous portion are brought together so as to close the discontinuous portion to prevent air leakage.

In order to achieve the above object, the shutter valve structure of the vehicle ventilator according to the invention of claim 2 is the shutter valve structure of the vehicle ventilator according to claim 1, wherein the first molding die is used. Then, while molding either one of the valve body or the seal forming body, the valve body or the seal forming body is formed on the molded body formed by the first forming die by the second forming die. The other one was molded and integrated to form the seal portion formed of the seal forming body on the peripheral portion of the valve body.

With such a construction, not only the same operation as that of the above-mentioned invention of the first aspect can be achieved, but also the seal portion can be easily and efficiently formed on the valve body, and the manufacturing process of the shutter valve is rationalized. Therefore, the manufacturing cost can be reduced.

In order to achieve the above object, a shutter valve structure for a vehicle ventilator according to a third aspect of the present invention is the shutter valve structure for a vehicle ventilator according to the first aspect, wherein the valve body and the seal are provided. The above-mentioned resins used for forming each of the formed bodies were combined so as to melt and solidify each other and to exhibit adhesiveness.

With such a construction, not only the same operation as that of the above-described invention of the first aspect can be achieved, but also the seal portion can be easily and efficiently formed in the valve body, and the manufacturing process of the shutter valve is rationalized. Therefore, the manufacturing cost can be reduced.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A shutter valve structure for a vehicle ventilator according to the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a ventilator for a vehicle equipped with the shutter valve structure of the present invention, and FIG. 2 is AA of FIG.
3 is a sectional view taken along the line, FIG. 3 is a partially cutaway perspective view of the shutter valve structure of the vehicle ventilator of the present invention, FIG. 4 is a plan view of the shutter valve structure, and FIG. 5 is taken along line BB of FIG. FIG. 6 is a sectional view taken along the line CC of FIG. 4, and FIG. 7 is a sectional view taken along the line DD of FIG.

The vehicle ventilator 1 has a case body 2, and a front portion 3 of the case body 2 facing the vehicle compartment is provided with a blowout port 4, and the blowout port 4 has a plurality of lateral fins. 5 and a plurality of vertical fins 6 are provided so that their angles can be adjusted. The inside of the case body 2 is formed in a ventilation passage a, and a shutter valve mounting portion 9 is provided in the middle of the ventilation passage a. The shutter valve mounting portion 9 has left and right side surfaces, that is, the case body. Shaft bearing holes 7 and 8 are provided in the left and right inner walls 2c and 2d of 2, respectively.

A shutter valve 10 for opening and closing the ventilation passage B is mounted in the shutter valve mounting portion 9. The shutter valve 10 is roughly composed of a substantially rectangular valve body 11 and a seal portion 12 provided on the peripheral portion of the valve body 11. The valve body 11 is a molded body obtained by injection molding a hard resin as the first resin, for example, polypropylene.

A shaft portion 12A is provided at the center of the right side of the valve body 11, and an insertion hole forming portion 12B into which a drive shaft of an arm described later is inserted is provided at the center of the left side of the valve body 11. Reinforcing ribs 13 are formed on the circumferential side portion 11A of the valve body 11 along the peripheral edge of the valve body 11, and the circumferential side portion 11A of the valve body 11 is formed.
A plurality of seal portion holding hole portions 14 are formed at predetermined intervals. These seal part holding holes 14 are shown in FIG.
As shown in FIG. 4, the groove portion 14A formed on the back side of the peripheral side portion 11A of the valve body 11 and the groove portion 1
4A and a hole 14B leading to 4A.

The seal portion 12 has a seal molded body formed by injection molding a soft resin as the second resin, for example, isoprene-based thermoplastic elastomer (abbreviated as SEPS), which is attached to the peripheral portion of the valve body 11. It is formed by The seal portion 12 is formed with slits 15 as discontinuous portions which are radially cut out at the four corner portions a, b, c, d of the valve body 11, and the seal portion 12 has four slits. Elastic pieces 12a, 12
It is divided into b, 12c and 12d.

Next, an outline of a method of molding the shutter valve 10 configured as described above will be described.

First, the valve body 11 is injection molded. For this injection molding, the first molding die 20 shown in (1) and (2) of FIG. 8 and (1) of FIG. The second molding die 21 shown in (2) is used. The first molding die 20 is composed of a lower die 17 and a first upper die 18. On the mating surface of the lower mold 17, there is formed a mold part 17A that fits the external shape of the valve body 11 excluding the upper surface part. Further, as shown in FIG. Slide mold 17 for forming the groove portion 14A of the portion 14
-1 is provided.

The mating surface of the first upper mold 18 has a mold part 18A conforming to the external shape of the upper surface of the valve body 11.
Further, as shown in FIG. 8B, a protrusion 18B for forming the hole 14B of the seal part holding hole 14 is provided. In addition, in the first upper mold 18,
A sprue runner 50 having a pinpoint gate 50a opened in the mold portion 18A is provided.

The second molding die 21 is composed of a lower die 17 of the first molding die 20 and a second upper die 19. Formed on the lower surface portion 19A of the second upper mold 19 are a mold portion 19B conforming to the external shape of the seal portion 12, and a sprue runner 51 communicating with the mold portion 19B via a pinpoint gate portion 51a. There is.

When the first upper mold 18 is fitted to the lower mold 17 and the first mold 20 is closed, the cavity K is formed by the mold portions 17A and 18A. Therefore, polypropylene which is the first resin melted in the cavity K is injected and filled from the sprue runner 50 to form the valve body 11 (the hole 23 in the shaft portion 12A and the shaft insertion hole 28 in the insertion hole forming portion 12B). The valve body 11) is formed in a state in which the above is not formed.

Next, the first molding die 20 is opened, and at the same time, the resin of the pinpoint gate portion 50a is removed by the valve body 11.
As shown in FIG. 9 while keeping the valve body 11 held in the mold part 17A of the lower mold 17,
As shown in (1) of FIG.
The second molding die 21 is configured in combination with. In this case, as shown in (2) of FIG. 9, the slide die 17-1 is lowered by a predetermined amount, and the groove portion 14 of the seal portion holding hole portion 14 is moved.
A space F corresponding to A is formed.

Next, from the sprue runner 51, an isoprene-based thermoplastic elastomer, which is the second resin melted, is injection-filled into the cavity K-1 formed by the mold portion 19B and the upper surface of the valve body 11. To form a seal portion 12 made of a seal forming body. In this case, the molten resin flows from the hole 14B of the seal holding hole 14 to the groove 1
The space F corresponding to 4A is filled and the seal holder 22 is formed (see FIG. 7).

The above-mentioned first and second resins have extremely good adhesiveness by such a molding process. Then, by filling the seal portion holding hole portion 14 with resin and forming the anchor-shaped seal holding portion 22 on the back surface, the two kinds of resins (first and second resins) are more firmly joined at the interface. . In addition to such a joint structure, the joint area may be increased as unevenness or through holes.

The shutter valve 10 thus formed has a hole 23 formed in its shaft portion 12A and a shaft insertion hole 28 formed in its insertion hole forming portion 12B. The shutter valve 10 is inserted into the shutter valve mounting portion 9 inside the case body 2, supports the shaft portion 12A in the shaft bearing hole 8, and supports the shutter valve mounting portion 9 on the left side. The shutter valve 1 is constructed by inserting and fixing the support shaft 24 rotatably passing through the hole 7 into the shaft insertion portion 12B.
0 is arranged in the shutter valve mounting portion 9.

An arm 25 is fixed to the outer end of the bearing shaft 24, and an operation dial 26 is rotatably supported on the front side of the left side of the case body 2. A link 27 connects the peripheral portion of the dial 26 and the arm 25.

Next, the operation of the shutter valve structure configured as described above will be described. By rotating the operation dial 26, the support shaft 24 is rotated via the link 27 and the arm 25 to rotate the shutter valve 10, and the shutter valve 10 forms an air passage a formed by the case body 2. In the closed state, as shown in FIGS. 10 and 11, the elastic pieces 12a and 12b of the seal portion 12 are in contact with the upper and lower inner wall surfaces 2a and 2b of the case body 2 so that the case body 2
The elastic piece 12c of the seal portion 12 is provided on the left inner wall 2c.
The upper and lower parts sandwiching the insertion hole forming part 12B are bent in opposite directions to be in contact with each other, and the right inner wall 2 of the case body 2
At d, the upper and lower parts of the elastic piece 12d of the seal part 12 sandwiching the shaft part 12B are bent in the opposite direction and are in contact with each other to maintain airtightness. Then, the ends of the elastic pieces 12a, 12b, 12c, 12d partitioned by the slit 15 are brought together so as to close the slit 15 to prevent air leakage.

In addition to the combination of the first and second resins shown in the above description of the embodiment of the present invention, a combination having various interfacial adhesiveness in insert molding or multicolor molding, such as ABS resin, It is possible to use an AES resin or the like and an olefin elastomer.

Further, by using a multicolor molding apparatus in which a plurality of molding dies are attached and the mold halves are automatically exchanged to sequentially combine a plurality of kinds of resins, one product is prepared for each molding cycle of one kind of constituent part. By using automatic molding that can achieve the above, or by using a multi-cavity mold that can mold multiple products in one molding die in one shot, the production amount can be secured manually, and the production efficiency depends on the skill level. However, it can be mass-produced extremely efficiently.

Further, in the above-described embodiment of the present invention, after the valve body 11 is molded by the first molding die 20, the seal forming body is formed on the valve body 11 by the second molding die 21. Although the seal portion 12 is provided on the peripheral portion of the valve body 11 by molding and molding, the seal forming body may be molded first and the valve body 11 may be joined to the seal forming body by molding. .

[0034]

As described above, in the shutter valve structure of the ventilator for a vehicle according to the invention of claim 1, the valve main body formed of the first resin and having the corner portion, and the second resin. And a seal forming body which is formed on the peripheral portion of the valve body and is integrally combined in a molding die to form a seal portion formed of the seal forming body on the peripheral portion of the valve body. By providing a discontinuous portion formed at least at the peripheral edge portion in the corner portion of the seal portion corresponding to the corner portion,
The seal portion can be easily and efficiently formed on the valve body, and the manufacturing process of the shutter valve can be rationalized to reduce the manufacturing cost.

Moreover, since the discontinuous portion is provided at the corner portion of the seal portion corresponding to the corner portion,
It is possible to prevent deformation of the seal portion due to the difference in heat shrinkage characteristics of the resin material forming the valve body and the seal portion, and when the shutter valve is rotated and the air passage formed by the case body is closed. The ends of the elastic pieces of the seal portion divided by the discontinuous portion are brought together so as to close the discontinuous portion to prevent air leakage.

Further, according to the shutter valve structure of the vehicle ventilator according to the invention of claim 2, in the shutter valve structure of the vehicle ventilator according to claim 1, the first molding die is used for the valve body or the valve body. While molding either one of the seal forming bodies, a second molding die is used to mold the molded body formed by the first molding die,
The other of the valve body or the seal forming body is molded and integrated, and the seal portion made of the seal forming body is formed on the peripheral portion of the valve body. Not only can the same effect be achieved, but also the seal portion can be easily and efficiently assembled to the valve body, and the manufacturing process of the shutter valve can be rationalized to reduce the manufacturing cost.

According to the shutter valve structure for a vehicle ventilator according to the third aspect of the invention, in the shutter valve structure for a vehicle ventilator according to the first aspect, the valve body and the seal forming body are molded separately. By combining the resins used to be melted and solidified with each other and exhibiting adhesiveness, not only the same effects as the effects of the invention of claim 1 described above can be obtained, but also a sealing portion can be easily formed on the valve body. It can be assembled efficiently, the manufacturing process of the shutter valve can be rationalized, and the manufacturing cost can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view of a vehicle ventilator having a shutter valve structure of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a partially cutaway perspective view of a shutter valve structure of a vehicle ventilator according to the present invention.

FIG. 4 is a plan view of the shutter valve structure.

5 is a cross-sectional view taken along the line BB of FIG.

6 is a cross-sectional view taken along the line CC of FIG.

7 is a cross-sectional view taken along the line DD of FIG.

FIG. 8A is a vertical cross-sectional view in which a part of the first molding die is omitted. (2) is a longitudinal sectional view of a part of the molding die.

FIG. 9 (1) is a vertical cross-sectional view in which a part of the second molding die is omitted. (2) is a longitudinal sectional view of a part of the molding die.

FIG. 10 is an operation explanatory view of the shutter valve structure of the vehicle ventilator of the present invention.

FIG. 11 is an operation explanatory view of the shutter valve structure.

[Explanation of symbols]

2 case body 10 shutter valve 11 Valve body 12 Seal part 15 slits (discontinuous part) a, b, c, d corners 20 First Mold 21 Second Mold

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-8-216676 (JP, A) JP-A-63-68420 (JP, A) JP-A-61-262541 (JP, A) Actual Kaihei 7- 28711 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) B60H 1/34 F24F 13/14

Claims (3)

(57) [Claims] 1. A valve body formed of a first resin and having a corner portion, and a seal forming body formed of a second resin and arranged at a peripheral portion of the valve body are integrally formed in a molding die. To form a seal portion formed of the seal forming member on the peripheral portion of the valve body, and in the corner portion corresponding to the corner portion of the seal portion,
A shutter valve structure for a ventilator for a vehicle, comprising a discontinuous portion formed at least at a peripheral portion. 2. A molding formed by a first molding die of the valve body or the seal forming body, and a second molding die formed by the first molding die. The shutter of a ventilator for a vehicle according to claim 1, wherein the valve body or the other of the seal forming body is molded and integrated with a body, and the seal portion formed of the seal forming body is formed on a peripheral portion of the valve body. Valve structure. 3. The vehicle ventilator according to claim 1 or 2, wherein the resins used for molding the valve body and the seal forming body are combined so as to melt and solidify each other and exhibit adhesiveness. Shutter valve structure.