JPH1095228A - Shutter valve structure for vehicular ventilator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rationalize a shutter valve manufacturing process so as to reduce manufacturing cost by forming a seal part easily and efficiently at a valve body. SOLUTION: A valve body 11 formed of first resin and having corner parts a, b, c, d, and a seal forming body formed of second resin and arranged at the peripheral part of the valve body 11 are integrally combined and connected in a metal mold. A seal part 12 formed of the seal forming body is thereby formed at the peripheral part of the valve body 11, and the seal part 12 is provided with slits 15 at corner parts corresponding to the corner parts a, b, c, d.

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 As disclosed in Japanese Utility Model Laid-Open Publication No. 5-26542, a conventional shutter valve in this type of shutter valve structure has a continuous groove formed on the periphery of a plate-shaped valve body. A rectangular ring-shaped sponge body having an outer shape larger than the outer shape of the valve body is mounted (fitted) in the groove, and a seal portion made of a sponge body is formed around the periphery of the valve body by combination.

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

[0004]

However, in the above-described conventional shutter valve structure, when a plate-shaped valve body is formed by resin molding, an undercut is formed almost all around the valve body. In addition, the structure of the molding die becomes complicated, and the rectangular ring-shaped sponge body constituting the seal portion cuts out the sponge sheet, which is a raw material, so that a loss of the raw material is caused. There was a problem of bringing up.

[0005] In addition, a rectangular ring-shaped sponge body may lose its sealing properties with time because the seal end face may be loosened due to the bending of the long side portion only if it is fitted into the valve body, and the sponge body may have rigidity. However, there is a problem that compatibility with sealing properties is difficult.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to enable a seal portion to be easily and efficiently formed on a valve body. An object of the present invention is to provide a shutter valve structure of a vehicle ventilator that can reduce a manufacturing cost by rationalizing a manufacturing process.

[0007]

In order to achieve the above object, a shutter valve structure for a vehicle ventilator according to the first aspect of the present invention comprises: a valve body formed of a first resin and having a corner portion; A seal formed of a second resin and disposed on the periphery of the valve body is integrally combined in a molding die and joined to form a seal formed of the seal formation on the periphery of the valve body. And a discontinuous portion formed at least in a peripheral portion at a corner portion of the seal portion corresponding to the corner portion.

[0008] With this configuration, the seal portion can be easily and efficiently formed on the valve body, and the manufacturing process of the shutter valve can be rationalized and the manufacturing cost can be reduced.

Further, by providing a discontinuous portion at a corner portion of the seal portion corresponding to the corner portion,
It is possible to prevent the 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 to rotate the shutter valve, and in a state where the shutter valve closes the ventilation passage formed by the case body. The end of each elastic piece of the seal portion divided by the discontinuous portion is brought together so as to close the discontinuous portion, thereby preventing air leakage.

According to a second aspect of the present invention, there is provided a shutter valve structure for a vehicle ventilator according to the first aspect of the present invention. Then, either one of the valve body or the seal forming body is formed, and the valve body or the seal forming body is formed by a second forming die on a formed body formed by the first forming die. Was molded and integrated to form the seal portion made of the seal forming body on the periphery of the valve body.

With this configuration, not only can the same effect as the above-mentioned invention of claim 1 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 can be streamlined. As a result, the manufacturing cost can be reduced.

According to a third aspect of the present invention, there is provided a shutter valve structure of a vehicle ventilator according to the first aspect of the present invention, wherein the valve body and the seal are provided. The resins used for the respective moldings of the formed body were melted and solidified with each other, and a combination was developed to exhibit adhesiveness.

With this configuration, not only can the same effect as the above-described invention of claim 1 be obtained, but also the seal portion can be easily and efficiently formed on the valve body, and the manufacturing process of the shutter valve can be streamlined. As a result, the manufacturing cost can be reduced.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A shutter valve structure of 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 vehicle ventilator having a shutter valve structure according to the present invention, and 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 a view 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 part 3 of the case body 2 facing the cabin is provided with an outlet 4, and the outlet 4 has a plurality of horizontal fins. A plurality of vertical fins 5 and a plurality of vertical fins 6 are provided so as to be adjustable in angle. The inside of the case body 2 is formed as a ventilation passage a, and a shutter valve mounting portion 9 is provided in the middle of the ventilation passage a. 2, left and right inner walls 2c, 2d are provided with shaft bearing holes 7, 8, respectively.

A shutter valve 10 for opening and closing the ventilation passage a is mounted in the shutter valve mounting section 9. The shutter valve 10 has a substantially rectangular valve body 11 and a seal portion 12 provided around the valve body 11. And the valve main 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 a right central portion of the valve body 11, and an insertion hole forming portion 12B into which a drive shaft of an arm to be described later is inserted is provided at a left central portion. A reinforcing rib 13 is formed on the peripheral side portion 11A of the valve body 11 along the peripheral edge of the valve main body 11, and the peripheral side portion 11A of the valve main body 11 is formed.
Are formed with a plurality of seal portion holding holes 14 at predetermined intervals. These seal holding holes 14 are provided in FIG.
The groove 14A formed on the back side of the peripheral side portion 11A of the valve body 11 as shown in FIG.
The hole 14B communicates with the hole 4B.

The seal portion 12 is formed by attaching a seal resin formed by injection molding a soft resin as a second resin, for example, an isoprene-based thermoplastic elastomer (abbreviated as SEPS) to the periphery of the valve body 11. It is formed by this. The seal portion 12 has slits 15 formed as discontinuous portions radially cut out at four corners a, b, c, and d of the valve body 11. Elastic pieces 12a, 12
b, 12c, and 12d.

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

First, the valve body 11 is injection-molded. In this injection molding, a first molding die 20 shown in (1) and (2) of FIG. 8 and (1) and (2) of FIG. The second molding die 21 shown in (2) is used. The first molding die 20 includes a lower die 17 and a first upper die 18. Formed on the mating surface of the lower mold 17 is a mold 17A conforming to the external shape excluding the upper surface of the valve body 11, and as shown in FIG. Slide mold 17 for forming the groove 14A of the portion 14
-1 is provided.

The mating surface of the first upper mold 18 has a mold portion 18A conforming to the external shape of the upper surface of the valve body 11.
Further, as shown in FIG. 8 (2), a projection 18B for forming a hole 14B of the seal holding hole 14 is provided. Also, the first upper mold 18 has
A sprue runner 50 having a pinpoint gate 50a opened in the mold portion 18A is provided.

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

When the first mold 20 is closed by aligning the first upper mold 18 with the lower mold 17, a cavity K is formed by the mold 17A and the mold 18A. Therefore, the sprue runner 50 injects and fills the first resin melted into the cavity K, polypropylene, to fill 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). Of the valve body 11) in a state in which 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 poured into the valve main body 11a.
9 (cut at the same time as the mold is opened), while holding the valve body 11 in the mold 17A of the lower mold 17, FIG.
As shown in (1) of FIG.
To form a second molding die 21. In this case, the slide die 17-1 is lowered by a predetermined amount as shown in FIG.
A space F corresponding to A is formed.

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

The first and second resins have very good adhesiveness by such a molding process. By filling the seal holding hole 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 strongly joined at the interface. . In addition, the bonding area may be increased by using irregularities, through holes, or the like in addition to such a bonding structure.

In the shutter valve 10 thus formed, a hole 23 is formed in the shaft portion 12A, and a shaft insertion hole 28 is formed in the insertion hole forming portion 12B. When the shutter valve 10 is inserted into the shutter valve mounting portion 9 inside the case body 2, the shutter valve 10 supports the shaft portion 12 </ b> A in the shaft support hole 8, and the left shaft support of the shutter valve mounting portion 9. A shutter shaft 24 rotatably penetrating through the hole 7 is inserted into and fixed to the shaft insertion portion 12B.
0 is disposed in the shutter valve mounting portion 9.

An arm 25 is fixed to the outer end of the support shaft 24, and an operation dial 26 is rotatably supported at the front of the left side of the case body 2. A peripheral portion of the use dial 26 and the arm 25 are connected by a link 27.

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 a ventilation path formed by the case body 2. In the closed state, the elastic pieces 12a, 12b of the seal portion 12 contact the upper and lower inner wall surfaces 2a, 2b of the case body 2 as shown in FIGS.
The elastic piece 12c of the seal portion 12
The upper part and the lower part sandwiching the insertion hole forming part 12B are bent in the opposite directions and come into contact with each other.
The upper and lower portions of the elastic piece 12d of the seal portion 12 sandwiching the shaft portion 12B are bent in opposite directions to contact with d, thereby maintaining airtightness. The ends of the elastic pieces 12a, 12b, 12c, and 12d defined by the slit 15 are brought together so as to close the slit 15, thereby preventing air from leaking.

In addition to the combinations of the first and second resins shown in the above description of the embodiment of the present invention, combinations having various interfacial adhesive properties in insert molding and multicolor molding, for example, ABS resin, It is possible to use an AES resin or the like and an olefin-based elastomer.

Further, by using a multi-color molding apparatus in which a plurality of molding dies are mounted, the half molds are automatically exchanged, and a plurality of types of resins are sequentially combined, one product is produced for each molding cycle of one kind of constituent part. The production volume can be secured manually by conventional methods, such as automatic molding that can obtain a product, or a multi-cavity mold that can mold a plurality of products in one molding die in one shot. Can be mass-produced very efficiently.

In the embodiment of the present invention described above, after the valve main body 11 is molded by the first molding die 20, a seal forming body is formed on the valve main body 11 by the second molding die 21. Although the seal portion 12 is provided around the periphery of the valve body 11 by molding and integrating, the seal body may be molded first, and the valve body 11 may be coupled to the seal body by molding. .

[0034]

As described above, in the shutter valve structure for a vehicle ventilator according to the first aspect of the present invention, a valve body formed of a first resin and having a corner portion, and a second resin. And a seal forming body disposed on the periphery of the valve body are integrally combined in a molding die and combined to form a seal portion formed of the seal forming body on the periphery of the valve body. By providing a discontinuous portion formed at least in the peripheral portion at a corner portion of the seal portion corresponding to the corner portion,
The sealing portion can be easily and efficiently formed on the valve body, and the manufacturing process of the shutter valve can be rationalized and the manufacturing cost can be reduced.

Further, by providing a discontinuous portion at a corner portion of the seal portion corresponding to the corner portion,
It is possible to prevent the 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 to rotate the shutter valve, and in a state where the shutter valve closes the air passage formed by the case body. The end of each elastic piece of the seal portion divided by the discontinuous portion is brought together so as to close the discontinuous portion, thereby preventing air leakage.

Further, according to the shutter valve structure for a vehicle ventilator according to the second aspect of the present invention, in the shutter valve structure for a vehicle ventilator according to the first aspect, the valve body or the valve body is formed by a first molding die. Either one of the seal forming bodies is molded, and the second molding die is used to form the molded body molded by the first molding die.
The effect of the invention of claim 1 described above, wherein the other of the valve body or the seal forming body is molded and integrated to form the seal portion formed of the seal forming body on the periphery of the valve body. Not only can a similar effect be achieved, but also the seal can be easily and efficiently assembled to the valve body, and the manufacturing process of the shutter valve can be streamlined to reduce the manufacturing cost.

According to the shutter valve structure for a vehicle ventilator according to the third aspect of the present invention, in the shutter valve structure for a vehicle ventilator according to the first aspect, each of the valve body and the seal forming body is formed. The resin used is melted and solidified with each other, and by combining the resins with each other, the same effect as the effect of the first aspect of the present invention can be obtained. The shutter valve can be efficiently assembled, and the manufacturing process of the shutter valve can be rationalized and the manufacturing cost can be reduced.

[Brief description of the drawings]

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

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

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

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

FIG. 5 is a sectional view taken along line BB of FIG. 4;

FIG. 6 is a sectional view taken along line CC of FIG. 4;

FIG. 7 is a sectional view taken along line DD of FIG. 4;

FIG. 8 (1) is a longitudinal sectional view of a first molding die with a part omitted. (2) is a longitudinal sectional view of a part of the molding die.

FIG. 9A is a longitudinal sectional view of a second molding die with a part omitted. (2) is a longitudinal sectional view of a part of the molding die.

FIG. 10 is an operation explanatory view of a 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 Slit (discontinuous part) a, b, c, d Corner part 20 First molding die 21 Second molding die

Claims (3)

[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 disposed on a peripheral portion of the valve body, are integrally formed in a molding die. To form a seal portion made of the seal forming body on the periphery of the valve body, and at a corner portion of the seal portion corresponding to the corner portion,
A shutter valve structure for a vehicle ventilator, wherein a discontinuous portion formed at least at a peripheral portion is provided. 2. A mold formed by using a first molding die to form either the valve body or the seal forming body, and a second molding die formed by using the first molding die. The shutter for a vehicle ventilator according to claim 1, wherein the other of the valve body or the seal forming body is formed and integrated with a body, and the seal portion made of the seal forming body is formed on a periphery of the valve body. Valve structure. 3. The ventilator for a vehicle according to claim 1, wherein the resin used for molding each of the valve body and the seal forming body is a combination that fuses and solidifies with each other and expresses adhesiveness. Shutter valve structure.