JPH05201234A - Air passage switching device - Google Patents

Abstract

PURPOSE:To provide an air passage switching device provided with a winding screen made of a laminated material so as to be suited to practical application. CONSTITUTION:An air conditioning damper device for vehicle according to this invention performs switching of wind direction or control of air quantity of an air conditioning device for vehicle, etc., by sliding a screen 41 formed by laminates of a resin coat layer 8 or a resin film layer 5 and a woven fabric layer 7. The resin film layer 5 exhibits excellent tensile strength, bending strength, and creep resistance, and inhibits the weak point of the woven fabric layer 7 of being elastically deformed or plastically deformed (initial elongation). The woven fabric layer 7 compensates for the weak point of the resin film layer 5 of low tearing strength, and the resin coat layer 8 compensates for the weak points of the woven fabric layer 7, namely low resistance to wear, low frictional force. Further, the respective layers are provided with flexibility (high flexural property), moisture resistance, heat resistance, and fill up the requirements of the screen as a whole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioning damper device.

[0002]

2. Description of the Related Art As a conventional vehicle air conditioning damper device, a plate damper device for controlling air flow or changing air flow by rotating a damper plate has been put into practical use, but Japanese Patent Laid-Open No. 141141/1989 discloses an air conditioner case. A flexible screen made of, for example, a polyethylene film is slid along each blowing opening, and the blowing blown out from each blowing opening is determined by the degree of overlap between each ventilation hole opened at a predetermined position of the film and each blowing opening. A so-called film damper for individually controlling the air volume is disclosed.

[0003]

However, as a result of various experiments, a screen made of a resin film used in the above-mentioned conventional film damper device is not satisfactory in terms of tensile strength, wind blocking property and flexibility. Although obtained, it was found that the tear strength was not practically sufficient.

That is, the screen in the vehicle air-conditioning damper device must slide along the inner wall surface of the case over the entire circumference of each blowout opening in order to prevent wind leakage, and also has a relatively small diameter drive roller and guide. Can be bent along rollers. For this reason, stress was locally concentrated on the screen, and the screen made of the resin film was torn, which made it unsuitable for practical use in terms of tear strength.

For this reason, the present inventors have made various studies other than the film as the material for the screen. First, rubber and fiber-reinforced rubber were first considered as candidates because they have good bending resistance by drive rollers and guide rollers and are highly flexible, but they are easy to deform, and air volume changes due to changes in the position and shape of the ventilation holes. It is difficult to accurately perform a damper function such as control or wind direction switching, and the wet heat resistance is poor.

Although the metal thin plate has many advantages, it has a problem in flexibility, and it is particularly difficult to bend it along a guide roller having a small diameter or to wind it on a driving roller having a small diameter. There was a problem that deformation was likely to occur. Woven fabrics are sufficient in terms of flexibility and tear resistance, but they do not have sufficient wind-blocking (wind-permeation-preventing) characteristics when woven with a normal thickness, and they are fluffed on the surface by sliding. Often occurred. Further, sliding noise is generated due to the unevenness of the surface, and friction is greater than that of the resin film, so that when the driving torque is small, smooth driving may be hindered.
In addition, it has been found that the woven fabric has a permanent elongation of about 2% at the beginning of sharing, which is called initial elongation, and the position of the vent hole is changed by these elongations, which may hinder precise air volume control.

The present invention has been made in view of these problems, and an object thereof is to provide an air passage switching device having a screen having excellent characteristics.

[0008]

An air passage switching device according to the first aspect of the present invention includes an air passage for guiding air, an air blowing unit for blowing air to the air passage, and a drive roller arranged in the air passage. A screen made of a flexible thin film having a ventilation hole for allowing air to flow, and the screen slides while sliding on a peripheral member by the driving of the drive roller to allow air in the ventilation passage to move. In the air passage switching device for switching the passage, the screen is
It is characterized by comprising a woven fabric layer and a resin coat layer impregnated on at least one surface of the woven fabric layer.

An air passage switching device according to a second aspect of the present invention includes an air passage for guiding air, and an air blowing unit for sending air to the air passage.
A driving roller disposed in the ventilation passage; and a screen made of a flexible thin film having ventilation holes for allowing air to flow, the screen sliding on peripheral members by driving of the driving roller. In the air passage switching device that switches the air passage in the ventilation passage by sliding while moving, the screen includes a resin film layer and a woven fabric layer applied to at least one surface of the resin film layer. It has a feature.

In a preferred embodiment of the second invention, the screen comprises the resin film layer, a woven fabric layer deposited on one surface of the resin film layer, and a resin coat layer impregnated on the surface of the woven fabric layer. The damper device for vehicle air conditioning according to claim 2, comprising: In a preferred aspect of the second invention, the screen comprises a resin film layer, a woven fabric layer applied on both sides of the resin film layer, and a resin coat layer impregnated on the surfaces of both woven fabric layers.

In a preferred embodiment of the second invention, the screen comprises a woven fabric layer and a resin film layer applied to both sides of the woven fabric layer. In a preferred aspect of the first and second inventions, the woven fabric layer is formed by intersecting a plurality of warp yarns arranged in the sliding direction and a plurality of weft yarns arranged vertically with the warp yarns, and The weft thread is thinner than the warp thread.

In a preferred aspect of the first and second inventions, in the woven fabric layer, a plurality of warp yarns arranged in the sliding direction and a plurality of weft yarns inclined with respect to the warp yarns intersect each other. It is characterized by being formed by. In a preferred aspect of the first and second inventions, the surface of the screen has a fungicide.

The resin film layer is made of PPS (polyphenylene sulfide), PET (polyethylene terephthalate), PEN (polyethylene naphthalate), PEI.
(Polyetherimide), PI (Polyimide), PES
(Polyether sulfone), PEEK (Polyether ether ketone), PSF (Polysulfone), PC
A resin such as (polycarbonate), PVC (polyvinyl chloride), PS (polysulfone) can be used as a material, and can be stretched in the winding direction. The thickness of the resin film layer is 20 to 150 μm.
m, preferably 38 to 75 μm.
If the thickness of the resin film layer is less than 20 μm, the problems of insufficient tensile strength and increased creep occur, while
If it is thicker than 150 μm, problems such as deterioration in flexibility and increase in operating force occur.

The woven fabric layer is made of nylon fiber, PET fiber, P
It can be formed by weaving filaments such as PS fiber, m-aramid fiber, p-aramid fiber, novoloid fiber, PTFE fiber, glass fiber, carbon fiber and boron fiber. The thickness of the woven fabric layer is 50 to 200 μ.
m, preferably 50 to 80 μm. If the thickness of the woven fabric layer is smaller than 50 μm, the tear strength will be deteriorated, while if it is thicker than 120 μm, it will be difficult to bend and the operating force will be increased. The woven fabric layer may be formed by directly weaving a single long fiber (monofilament), or may be formed by twisting a long fiber or a short fiber. The denier of the twisted yarn can be 20-70.

It is effective to improve the curl resistance that the woven fabric layers on both sides have the same thickness and the same material, but a thickness change of about 20% is practically acceptable. Further, the woven fabric layers on both sides can be different in weaving, material and thickness, but it is important that curl of the screen can be suppressed as a whole. Epoxy-based, urethane-based, epoxy-based (NBR-modified, silicon-modified) and the like can be adopted for sticking the resin film layer and the woven fabric layer. 1-20μ as the thickness of the adhesive
m or 5 to 30 g / square m is preferable. Alternatively, the two may be directly joined by a high-frequency weld or the like without using an adhesive.

For the resin coating layer, a silicone resin, an acrylic resin, a fluororesin or a mixture thereof having a low friction coefficient and heat resistance can be adopted. The thickness of the resin coat layer is 1 to 20 μm or 5 to 30 g / square m.

[0017]

According to this device, the screen is slid in the ventilation passage while being bent by a guide roller or the like by the driving of the driving roller, the position of the ventilation hole is shifted, and the air passage is switched. Here, switching the air passage includes changing the wind direction and changing the air volume.

The screen of the first invention is formed by impregnating a woven fabric layer with a resin coat layer. Experiments have shown that the woven layer has excellent tear strength and flexural properties (ie, flexibility or flexibility), as well as practical tensile strength. On the other hand, the resin coat layer improves the wind-blocking property (air-permeation-preventing property) and the surface frictional property of the woven fabric layer, which is not suitable for practical use as a screen, and further causes the surface of the woven fabric layer to be fuzzed by sliding. Prevent.

The screen of the second invention is formed by applying a resin film layer to a woven fabric layer. Experiments have shown that the woven layer has excellent tear strength and bending properties (i.e., flexibility or flexibility), and further complements the poor tear strength of the resin film layer, which is unsuitable for a screen. On the other hand, the resin film layer improves the inferior wind blocking property (air permeation preventive property) and the surface friction property of the woven fabric layer, which is not suitable for practical use as a screen, and further the surface of the woven fabric layer is fuzzed by sliding. In addition, the woven fabric layer complements the tensile strength which is slightly lacking in practical use.

[0020]

As described above, since the device of the first invention constitutes the screen by the woven fabric layer impregnated with the resin coating layer, the mechanical properties (flexibility) required for practical use (flexibility , A tensile strength, a tear strength, a low friction coefficient), an anti-fluffing property, and a wind blocking property (air permeation preventing property) can be realized.

In addition, since the device of the second invention constitutes the screen by the woven fabric layer coated with the resin film layer, the mechanical properties (flexibility, tensile strength, To realize an excellent screen having tear strength, low friction coefficient), anti-fluffing property and wind blocking property (air permeation preventing property), and further improving the tensile strength and elongation resistance of the woven fabric layer. You can

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an embodiment of a vehicle air conditioner to which a vehicle air conditioning damper device (air passage switching device) of the present invention is applied is shown in FIG.
Shown in. This vehicle air conditioner includes a fan (blower means in the present invention) 11 for blowing air, and an evaporator 12 for cooling air.
And an air-conditioning case (ventilation path in the present invention) 1 in which a heater 13 for heating air is installed. The air-conditioning case 1 has drive rollers 21 to 24 for winding the screen and a guide for guiding the screen. Rollers 31-35 and drive roller 2
A first screen 41 for changing the blowing direction whose both ends are fixed to 1 and 22 and a second screen (air mix damper) 42 for adjusting the amount of air passing through the heater 13 whose both ends are fixed to the driving rollers 23 and 24 are provided. I have it.

The drive rollers 21 to 24 have a motor built therein and both ends are supported by the inner wall of the case 1 and are rotated by energization to wind up the screens 41 and 42. The outer diameter of the drive rollers 21 to 24 is set to 20 mm or less. The guide rollers 31 to 35 are rollers for changing the angles of the screens 41 and 42.

The screen 41 is a film damper for switching the wind direction among a foot outlet, a differential outlet, and a face outlet (not shown), and a ventilation hole having a long hole (not shown) is provided at an appropriate position of the screen 41. ) Is opened, and the wind direction is switched by the displacement of the ventilation hole due to the sliding of the screen 41. That is, a foot outlet, a differential outlet, a foot outlet, a differential outlet, and a face outlet (not shown) communicating with the face outlet, the differential outlet, and the face outlet are provided in the air conditioning case 1. It is controlled by the vent holes in the screen 41.

FIG. 10 is an enlarged view of a cross section around the foot outlet opening 45. Foot outlet opening 4 in air conditioning case 1
5, a sliding edge 46 is provided so as to project inside, and the screen 41 slides while sliding on the top of the sliding edge 46. Then, when the ventilation hole 47 of the screen 41 communicates with the foot outlet 45, the conditioned air is blown to the foot outlet (not shown).

The screen 42 also has the same structure as the screen 41, and the lattice-shaped frame 13 enclosing the heater 13 is provided.
It extends over a. By sliding the screen 42, the ratio of the air volume passing through the heater 13 and the air volume not passing through the heater 13 is controlled. The screen 42 also slides on the grid frame 13a. Hereinafter, the change of the characteristics when the material is changed will be described with the screen 41 as a representative. (Example 1) The screen of Example 1 is shown in FIG.

This screen includes a resin film layer 5 and
The resin film layer 5 is composed of a woven fabric layer 7 having the same thickness, which is individually adhered to both surfaces of the woven fabric layer 7 by an adhesive layer 6, and a resin coat layer 8 applied to the surface of the woven fabric layer 7. The resin film layer 5 is a PPS resin having a thickness of 50 μm stretched in the winding direction, the adhesive layer 6 is an epoxy (NBR-modified) adhesive having a thickness of 5 μm, and the woven fabric layer has various thicknesses. , 6 nylon, and the resin coat layer 8 is 12 g of silicone compound.
(Dry) / solvent coated at a ratio of m.

In the first example, 20 denier long fibers (monofilaments) were directly woven to form a woven fabric layer 7 having a thickness of 50 μm. In the second example, a twisted yarn of 30 denier was woven to form a woven fabric layer 7 having a thickness of 80 μm. In the third example, 70-denier twisted yarn was woven to form a woven fabric layer 7 having a thickness of 120 μm. (Example 2) The screen of Example 2 is shown in FIG.

This screen has a resin film layer 5 and
The resin film layer 5 is composed of a woven fabric layer 7 attached to one surface by an adhesive layer 6. The materials of the resin film layer 5 and the woven fabric layer 7 are the same as those in the first to third examples of the first embodiment. The woven fabric layer 7 of the first comparative example was the same as that of the second example, and the woven fabric layer 7 of the second comparative example was the same as that of the third example. Example 3 The screen of Example 2 is shown in FIG.

This screen has a resin film layer 5 and
The resin film layer 51 is composed of a woven fabric layer 7 adhered to one surface of the resin film layer 51 with an adhesive layer 6, and a resin coat layer 8 impregnated on the surface of the woven fabric layer 7. Except for the silicon coat layer 8, the composition and thickness were the same as in Example 3. Example 4 The screen of Example 4 is shown in FIG.

The screen 41 comprises a woven fabric layer 7 and a resin film layer 5 adhered on both sides of the woven fabric layer 7 with an adhesive layer 6. The materials of the resin film layer 5 and the woven fabric layer 7 are the same as those in the first to third examples of the first embodiment. The resin film layer 5 had a thickness of 25 μm, and the woven fabric layer 7 was the same as that of the third example of the first embodiment.

In each of the above examples, the composition and thickness of the adhesive layer and the resin coat layer were the same. Example 5 The screen of Example 5 is shown in FIG. This screen comprises a woven fabric layer 7 and a resin coat layer 8 impregnated on both sides of the woven fabric layer 7.

The material of the woven fabric layer 7 is 200 to 1500
An aromatic amide fiber (Kepler (trade name)) of 0 denier (here, about 1000 denier) was used. Woven layer 73
The thickness was 220 μm. The resin coat layer 8 was impregnated with silicon / acrylic / fluorine emulsion (trade name Charine E (manufactured by Shin-Etsu Chemical KK)) at 100 to 200 g / m ² .

Table 1 shows the results of examining the tensile strength, tear strength, coefficient of dynamic friction, shear stress at the contact surface with the roller, and curl amount using the test pieces of the above-mentioned products.

[0035]

[Table 1]

A partial cross section of the screen tested as a comparative example is shown in FIG. This screen consists of the resin film layer 5 only. As material, PPS, PET, P
EN, PEI, PI, and PES resin were adopted, and the thickness was 50 μm. The results are shown in Table 2.

[0037]

[Table 2] The test conditions are described below.

The tensile test is conducted according to JIS K7127 (19
89) The tensile test method for plastic films and sheets according to 89) is applied, and the shape of the test piece is JIS K7127.
No. 5 dumbbell shape and test speed is 50mm / min
And The tear test is performed according to JIS K6783 (198
The tear test method for agricultural ethylene / vinyl acetate resin film according to 4) is applied correspondingly, and the shape of the test piece is JIS K6.
783 Tear strength test piece (JIS K6301 R
Type) and the test speed was 50 mm / min.

The dynamic friction coefficient is based on the Suzuki formula and P is used for the mating material.
20% P talc was used. JIS for curl measurement
Using a No. 5 dumbbell-shaped test piece of K7127, the sample was left at 150 ° C. for 250 hours, and the change rate of the width of the central region was obtained. The following can be seen from Tables 1 and 2. (1) The first to third example products of Example 1 are slightly improved in terms of tensile strength, but are significantly improved in terms of tear strength. Of course, even in the case of only the resin film layer shown in Table 2, the tear strength can be increased in proportion to the wall thickness by increasing the thickness. However, in order to obtain a practical level of tear strength equivalent to that of the first to third example products of Example 1, it is impossible to achieve the thickness because bending is difficult. Further, even if the wall thickness is reduced to some extent while being reluctant to reduce the tear strength, it is difficult to realize it because an extremely large force is still required to drive the screen. This advantage also applies to other embodiments.

Although a large tensile stress is applied to the screen 41 and the resin film layer 5 is used in a stretched state, the stretch of the resin film layer 5 is preferably within its elastic deformation range. The tensile strengths in the 5% elongation state were compared. (2) In the first to third example products of Example 1, the increase in driving force and sliding noise due to the lamination of the woven fabric layer 7 was solved by impregnating the resin coat layer 8. The frictional resistance of the screen 41 is halved, and the driving force and sliding noise are greatly reduced accordingly. This advantage also applies to other embodiments.

(3) It was found that the first to third example products of Example 1 had better tearability than those of Examples 2 and 3. It is considered that this is because the woven fabric layer 7 protects the resin film layer 5 from tearing on both sides of the resin film layer 5. (4) The first to third example products of Example 1 are the same as those of Examples 2, 3, and 4.
Wrinkles, curls, and buckling were less likely to occur during bending than those of No. That is, it was found that in Examples 2 and 3, when the resin film layer 71 bends with the resin film layer 71 facing inward, the resin film layer 71 cannot withstand the shear stress and causes wrinkles. Example 2
Was found to cause curling. Example 4
It was found that when the resin film layer 71 bends with the resin film layer 71 facing inward, it cannot withstand the above shear stress and buckles. Therefore, in the first to third example products of Example 1, since the resin film layer 5 is located on the roller via the woven fabric layer 7 regardless of which side the screen bends, the inner woven fabric layer 7
Will share a part of the compressive stress, and the excellent effect that the wrinkles and buckling will not easily occur in the resin film layer 5 can be obtained, and as a result, the bending and winding by the small diameter roller will be possible. I understood.

(5) In the case of Example 5, relatively good tensile strength and tear strength can be obtained without using the resin film layer 5, but the following are compared with those of Examples 1 to 4. It was found that such a problem would occur. First, high-strength fiber is used, so it is expensive, and the woven fabric has a thickness of 20.
Since it is difficult to make it to 0 μm or less, it is difficult to laminate the film layer 5. A screen made of a woven fabric layer simply coated with a resin tends to be broken at the yarn end by sliding or pulling at the opening end line. Regarding this problem, Examples 1 to 4
Things were much better. Although the woven fabric material was changed to nylon or the like in Example 5, the experiment was conducted.
It was far inferior to Kepler in terms of tensile strength and elongation.

(Variation 1) When the resin film layer 5 is composed of the stretched film stretched in the winding direction in the above-mentioned embodiment, the stretched film is inferior in tear resistance but excellent in elongation resistance. On the other hand, the woven fabric layer is inferior in elongation resistance, but is excellent in tear resistance, and by joining the two, a screen excellent in both elongation resistance and tear resistance can be constructed.

(Modification 3) In each of the embodiments and modifications described above, if the resin film layer 5 or the resin coat layer 8 is mixed with or applied with an antibacterial agent, the resin film layer 5 or the resin It is possible to suppress the growth of mold and other bacteria on the surface of the coat layer 8. In one example, the silicone resin emulsion for the resin coating layer 8 contains 100 to 2
TBZ (thiazolylbenzimidazole), PCMX (parachlorometaxylenol) at a concentration of 000 ppm,
An antibacterial / antifungal agent such as ZPT (zinc pyrithione) is mixed.

Next, the screen 4 of the first embodiment described above.
The manufacturing process of Nos. 1 and 42 will be described with reference to FIG. First, both surfaces of a PPS film as the resin film layer 5 are roughened by corona discharge or plasma discharge, adhesives 6 are applied to both surfaces of the resin film layer 5 and a woven fabric layer 7 is attached, and a silicone coating agent is applied. Is dried and heat-treated, or after being immersed in a silicone resin solution, it is heat-dried to form the resin coat layer 8.

In the screen of Example 1 described above, the resin film layer 5 exhibits excellent tensile and bending strengths and creep resistance, and the weakness of the woven fabric layer 7 is elastic deformation or plastic deformation (initial elongation). The woven fabric layer 7 complements the tear strength which is the weak point of the resin film layer 5, and the resin coat layer 8 complements the abrasion resistance and the low friction property which are the weak points of the woven fabric layer 7, Since it has flexibility (high bending property) and air permeation blocking property, it complements each other as required as a whole.

Further, according to the first embodiment, since the respective parts are symmetrical in the thickness direction, compared with the case where the woven fabric layer 7 and the resin film layer 5 are simply laminated, the car That is, permanent bending deformation can be significantly reduced. That is, when the woven fabric layer 7 and the resin film layer 5 are simply laminated, the resin is liable to be different due to the difference in hygroscopic swelling property and the difference in heat shrinkage property between the woven fabric layer 7 and the resin film layer 5. The curl is formed so that the film 5 side is a convex surface, and as a result, the position of the ventilation hole is displaced to change the damper characteristics, or the position of the screen is displaced to cause air leakage,
There is a problem that driving power and sliding noise increase. These problems are solved by laminating the woven fabric layer 7 on both sides of the resin film layer 5 shown in Example 1.

Further, in the screen of Example 1, as compared with the case where the woven fabric layer 7 and the resin film layer 5 are simply laminated, the plastic deformation (buckling or wrinkling) of the resin film layer 5 against bending is performed. ) Has the advantage that it can be suppressed. (Other Embodiments) Other embodiments will be described below.

The screen 41 of the sixth embodiment will be described with reference to FIG. This screen 41 is one in which the woven cloth layer 7 is adhered to both surfaces of the resin film layer 5 with the adhesive layer 6, and the resin film layer 5 is adhered to each surface of the woven cloth layer 7 with the adhesive layer 6. Is. A thickness of about 0.1 to 0.5 mm is suitable as a whole.

In this embodiment, if the central resin film layer 5 is a stretched film and the resin film layers 8 on both sides are unstretched films, curl resistance, low friction resistance, and softness compared to the case where a stretched film is used will result in seat resistance. The advantage of improving tropism arises. In this embodiment, the same effect as that of the first embodiment can be obtained. The screen 41 of Example 7 is demonstrated in FIG.

FIG. 11 is an enlarged view of a cross section around the foot outlet opening 45. The screen 41 slides while sliding on the top of a sliding edge 46 that is provided inside and surrounds the foot outlet opening 45 of the air conditioning case 1. The screen 41 has the configuration of Example 1, and the woven fabric layer 7 is attached to both sides of the resin film layer 5, and the surface of the woven fabric layer 7 is coated with a resin coat having a thickness of 10 μm, though not shown. The layer is impregnated.

In the woven fabric layer 7, the warp yarn 71 extending in the longitudinal direction is thick (here, 50 denier) and the weft yarn 72 is thin (here, 20 denier). If you do this,
Since the weft thread 72 is thinner than the warp thread 71, the unevenness of the surface of the screen 41 is reduced and the sliding resistance or sliding noise can be reduced. Moreover, since the warp yarn 71 is still thick, the tensile strength of the woven fabric layer 7 is not reduced.

Even when the resin coat layer 8 is impregnated and coated, when the thickness is thin, the unevenness of the thread remains on the surface. Of course, this embodiment can be adopted even when the resin coat layer 8 is not impregnated. 12
The screen 41 of Example 8 will be described below. FIG. 12 shows a screen 41 that slides along a part of the surface of the air conditioning case 1.

The screen 41 has the structure of the first embodiment. The woven fabric layer 7 (see FIG. 2) of the screen 41 is
The warp yarns 73 and the weft yarns 74 extending 45 degrees obliquely to the sliding direction are woven. By doing so, as compared with the case where the weft yarns 74 are oriented at right angles to the sliding direction, these yarns 73 and 74 are all at once.
(See Figure 1) and without riding on the air conditioning case 1,
Since the screen 41 becomes slippery, the driving force and sliding noise can be reduced. In this case, of course, such an oblique orientation is caused by the heater core 13 (see FIG. 1) and the air conditioning case 1.
It only has to be applied to the woven fabric layer 7 that slides with.

The screen 41 of the ninth embodiment will be described below. In this embodiment, the pitch of the weft threads is set wider than the pitch of the warp threads extending in the longitudinal direction of the woven fabric layer 7 of the screen 41. By doing so, the sliding resistance of the screen 41 can be reduced, and the driving force and sliding noise can be reduced. Since the tensile force concentrates on the screen 41 in its longitudinal direction, such a pitch arrangement is possible.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a vehicle air conditioner to which an air passage switching device of the present invention is applied,

2 is a partial cross-sectional view of the screen of Example 1 used in the apparatus of FIG.

3 is a partial cross-sectional view of the screen of Example 2 used in the apparatus of FIG. 1,

4 is a partial cross-sectional view of a screen of Example 3 used in the device of FIG. 1,

5 is a partial cross-sectional view of the screen of Example 4 used in the apparatus of FIG.

6 is a partial cross-sectional view of a screen of Example 5 used in the apparatus of FIG. 1,

7 is a partial cross-sectional view of the screen of Example 6 used in the apparatus of FIG. 1,

FIG. 8 is a partial cross-sectional view of a screen used as a comparative example,

FIG. 9 is a schematic process chart showing an example of the manufacturing process of Example 1;

10 is a partial cross-sectional view of the screen of Example 1 used in the device of FIG. 1,

11 is a partial cross-sectional view of the screen of Example 7 used in the apparatus of FIG. 1,

12 is a partial plan view of the screen of Example 8 used in the apparatus of FIG. 1,

[Explanation of symbols]

 5 ... Resin film layer 6 ... Adhesive layer 7 ... Woven fabric layer 8 ... Resin coat layer 41 ... Screen

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Fumio Kato 1-1, Showa-cho, Kariya city, Aichi Prefecture Nihon Denso Co., Ltd. (72) Inventor Hirotaka Hiroc 1-1, Showa-cho, Kariya city, Aichi prefecture Nidec Within the corporation

Claims (8)

[Claims] 1. A flexible structure having an air passage for guiding air, an air blowing unit for blowing air to the air passage, a drive roller arranged in the air passage, and a ventilation hole for passing air. A screen made of a thin film, wherein the screen slides while sliding on a peripheral member by the drive of the drive roller to switch the air passage in the ventilation passage, and the screen is a woven fabric. An air passage switching device comprising a fabric layer and a resin coat layer impregnated on at least one surface of the woven fabric layer. 2. A flexible structure having an air passage for guiding air, an air blowing unit for blowing air to the air passage, a drive roller arranged in the air passage, and a ventilation hole for passing air. A screen made of a thin film, wherein the screen is an air passage switching device that switches an air passage in the ventilation passage by sliding while sliding with a peripheral member by driving of the driving roller, wherein the screen is made of resin. An air passage switching device comprising a film layer and a woven fabric layer applied to at least one surface of the resin film layer. 3. The screen includes the resin film layer, and a woven fabric layer applied to one surface of the resin film layer,
The air passage switching device according to claim 2, comprising a resin coat layer impregnated on the surface of the woven fabric layer. 4. The screen includes the resin film layer, and a woven fabric layer applied to both surfaces of the resin film layer.
The air passage switching device according to claim 2, comprising a resin coat layer impregnated on the surface of the woven fabric layer. 5. The air passage switching device according to claim 2, wherein the screen includes the woven fabric layer and resin film layers applied to both surfaces of the woven fabric layer. 6. The woven fabric layer is formed by intersecting a plurality of warp yarns arranged in the sliding direction and a plurality of weft yarns arranged perpendicularly to the warp yarns, and the weft yarns are thinner than the warp yarns. The air passage switching device according to claim 2, wherein 7. The woven fabric layer is formed by intersecting a plurality of warp yarns arranged in the sliding direction and a plurality of weft yarns inclined with respect to the warp yarns. The air passage switching device according to claim 2. 8. The air passage switching device according to claim 1, wherein a surface of the screen has an antibacterial agent.