JP5440246B2 - Vehicle seat cover - Google Patents

Description

  The present invention relates to a vehicle seat cover.

  Patent Document 1 below discloses a vehicle seat in which moisture-absorbing heat generation fibers are included in a seating surface with which a seated person comes into contact among the surface materials of the seat. In this seat, the moisture-absorbing heat generation fiber contained in the surface material reacts with the water vapor generated by the seat occupant to generate moisture, so that the seat occupant can feel a smooth sensation and warmth on the contact surface with the seat. . In Patent Document 1 below, an air layer is formed by laminating an open cell layer on a surface material, and by improving air permeability in the entire surface direction of the skin material, moisture absorption / moisture release by the moisture-absorbing heat-generating fiber is achieved. Along with this, it has been proposed to help the water vapor migrate smoothly. It has also been proposed to improve the sustainability of the hygroscopic heat generation action by the hygroscopic heat generating fiber by making the core material breathable so that water vapor from the surface material can be vented out of the core material. ing.

JP 2001-112578 A

  By the way, even when the surface material includes moisture-absorbing heat-generating fibers, if the temperature rise due to heat generation by the moisture-absorbing heat-generating fibers is small, the seated person cannot feel the warmth. In order to experience it, the amount of moisture-absorbing exothermic fiber was increased, and it was easy to increase the cost. In this regard, in the above conventional seat, it is possible to efficiently supply moisture to the moisture-absorbing exothermic fiber by improving the air permeability as a whole and promote the moisture-absorbing exothermic reaction of the moisture-absorbing exothermic fiber, but less water vapor is generated by the seat In some cases, the temperature does not necessarily increase so that the seated person can experience warmth.

  SUMMARY OF THE INVENTION An object of the present invention is to make a seated person feel warmth more reliably while suppressing the amount of moisture-absorbing heat-generating fibers used in a vehicle seat cover including moisture-absorbing heat-generating fibers.

  The present invention is a vehicle seat cover that covers a seat pad that forms a seating surface of a vehicle seat, and includes a skin material that constitutes the seating surface, and the surface of the skin material constitutes the seating surface. The skin body has a skin structure, and in the surface direction of the skin material, a skin structure is formed on the back surface of the skin body and the air flow suppressing portion in which the air flow in the thickness direction is suppressed, and the skin structure has a skin structure on the back surface of the skin body. A non-ventilating portion is set, and at least in the venting portion, the skin main body contains moisture-absorbing heat-generating fibers. The hygroscopic exothermic fiber is a fiber material that absorbs moisture (water vapor, moisture) and generates heat.

In the vehicle seat cover of the present invention, by suppressing the ventilation in the thickness direction in the ventilation suppressing portion, the water vapor emitted from the seated person is intensively supplied to the ventilation portion where the ventilation is not suppressed. Therefore, even when the amount of water vapor emitted from the seated person is relatively small, the heat generation amount of the moisture-absorbing heat-generating fibers can be locally increased in the ventilation portion, and the temperature can be further increased. And it can make it easy for a seated person to feel warmth by the degree of a temperature rise becoming large.
Here, when the human body feels the warmth of the seating surface with the skin, even if the temperature rises over a wide range, it is difficult to experience if the degree of temperature rise is small, but even if it is local, if the degree of temperature rise is large, it can be experienced It's easy to do. In addition, when the human body senses the warmth of the seating surface with the skin, it is possible to clearly grasp the boundary line between the heat generation point and the non-heat generation point when the heat generation point and the non-heat generation point are mixed in the surface direction. First, grasp the fever spot vaguely. Therefore, in the region where the seated person wants to experience the warmth of the seated person, the portions where the temperature rises are not continuous by interspersing the ventilation portions with a large degree of temperature rise in the ventilation control portion. However, it is possible for the seated person to feel as if the entire area is warm. Therefore, it is possible to make the seated person feel the warmth more reliably while suppressing the amount of moisture-absorbing heat-generating fibers used.

  In such a vehicle seat cover, it is preferable that the moisture-absorbing heat generating fibers are not exposed on the surface constituting the seating surface of the skin body, because the wear of the moisture-absorbing heat generating fibers is suppressed and the moisture absorbing heat generating performance is maintained.

ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to make a seated person experience warmth more reliably, suppressing the usage-amount of a hygroscopic heat generation fiber small.
Furthermore, when the moisture-absorbing heat generating fiber is not exposed on the surface constituting the seating surface of the skin body, the moisture-absorbing heat generating performance of the moisture-absorbing heat generating fiber is maintained, and it is possible to maintain the effect of making the seated person feel the warmth. .

It is a perspective view of the vehicle seat provided with the vehicle seat cover which concerns on embodiment of this invention. It is a figure which expands and shows the II-II line cross section of the vehicle seat shown by FIG. It is a perspective view of the test piece which concerns on an experiment example. It is a perspective view of the test apparatus which concerns on an experiment example. FIG. 5 is a cross-sectional view of the test apparatus shown in FIG. 4 taken along line VV. It is a graph which shows the maximum value of the raise temperature which concerns on an Example. It is a graph which shows the time-dependent change of the raise temperature which concerns on an Example.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a vehicle seat 11 according to the present embodiment. The vehicle seat 11 is mainly composed of a seat cushion 13 on which a seated person sits down, a seat back 15 leaning back and a headrest 17. In the present embodiment, the seat surface 13a on which the seated person of the seat cushion 13 sits down is provided with a configuration capable of generating heat.

  As shown in FIG. 2, the seat surface 13 a of the seat cushion 13 is formed by a seat pad 21 formed by molding urethane foam or the like, and is covered with a bag-like seat cover 31 along the surface of the seat pad 21. Has been. Therefore, the seat surface 13 a that is a surface with which a seated person contacts in the seat cushion 13 is constituted by the seat cover 31.

  As shown in FIG. 1, in the seat cushion 13 according to the present embodiment, a region W (hereinafter referred to as a warm region) in which the seated person feels warmth is set at a position where the seated person's buttocks contact. Has been. The seat cover 31 generates heat in the warm region W, so that the seated person can feel the warmth.

  As shown in FIG. 2, the seat cover 31 includes a skin material 33 that is exposed on the outer surface of the seat cushion 13 and forms a seating surface 13 a. And this skin material 33 has the skin main body 35 in the site | part which is exposed to the outer surface of the seat cushion 13 and comprises the seat surface 13a. The skin main body 35 is a cloth-like member having a tissue shape that inherently has air permeability in the thickness direction, and is constituted by a woven fabric in this embodiment. As will be described in detail later, the skin main body 35 includes at least a moisture absorbing heat generating fiber 43, and the seat cover 31 is warmed by the seat occupant when the moisture absorbing heat generating fiber 43 included in the skin main body 35 absorbs heat and generates heat. It is possible to experience this.

  In the warm region W of the seat cover 31, a ventilation portion 37 and a ventilation suppression portion 39 are set in the surface direction of the skin material 33. In FIG. 1, the ventilation portion 37 is provided with a lattice pattern to illustrate the arrangement of the ventilation portion 37 and the ventilation suppression portion 39. That is, in the warm region W, the portion with the lattice pattern is the ventilation portion 37, and the other portion is the ventilation suppression portion 39. In the present embodiment, the ventilation portions 37 are scattered in the ventilation suppression portion 39.

  In the airflow suppression unit 39, the skin material 33 includes a film structure 41 that suppresses airflow in the thickness direction on the back surface side opposite to the surface constituting the seat surface 13 a of the skin body 35. The film structure 41 can be formed by, for example, a coating film of a resin such as an acrylic resin or a urethane resin, or by laminating films. On the other hand, the ventilation portion 37 does not include the film structure 41, and the skin main body 35 can exhibit the original air permeability.

The skin main body 35 provided with the ventilation part 37 and the ventilation suppression part 39 can be created as follows.
For example, when the film structure 41 of the airflow suppressing portion 39 is formed of a coating film such as a resin, the masking portion is formed by applying a resin to the back surface of the skin body 35 in a state where the portion to be the airflow portion 37 is masked. The ventilation portion 37 can be formed on the surface, and the ventilation suppression portion 39 can be formed in a portion where the resin is applied without masking.
Further, for example, when the film structure 41 of the airflow suppressing portion 39 is formed of a film, a film having holes formed at positions corresponding to the airflow portions 37 is laminated on the back surface of the skin main body 35, thereby The ventilation portion 37 can be formed at a position, and the ventilation suppression portion 39 can be formed in another portion where the film is laminated.

  In the ventilation portion 37, the moisture absorption heat generation fiber 43 is included in the skin main body 35. In the present embodiment, the skin body 35 is a woven fabric, and includes first constituent fibers 45 and hygroscopic heat generating fibers 43 as constituent fibers. That is, the hygroscopic heating fiber 43 is included as one of the fibers constituting the fabric that is the skin body 35.

  The first constituent fiber 45 is a fiber material other than the hygroscopic exothermic fiber 43 constituting the fabric that is the skin body 35, and its name is used to make the distinction from the hygroscopic exothermic fiber 43 more clear in the specification. It is attached for the sake of convenience. The material of the first constituent fiber 45 is not particularly limited, and various chemical fibers, natural fibers, and the like can be used. Among them, fibers such as polyester, which are less hygroscopic than the hygroscopic heating fiber 43 and hardly absorb hygroscopicity, do not prevent the first constituent fiber 45 from absorbing moisture and prevent contact with the hygroscopic heating fiber 43. It is preferable in that the hygroscopic exothermic reaction of the fiber 43 can proceed efficiently. The first constituent fiber 45 is not necessarily limited to one type of fiber, and different fibers may be used for each part in consideration of the design of the seat surface 13a, the touch, and the like.

  The moisture-absorbing heat-generating fiber 43 is a fiber that generates heat due to condensation heat, adsorption heat, heat of hydration, or the like generated by moisture adsorbed on the fiber surface. The type of the moisture-absorbing heat-generating fiber is not particularly limited. For example, there is an acrylate-based moisture-absorbing heat-generating fiber that is modified with synthetic fiber acrylic or the like so as to contain a large amount of moisture.

  One example of the acrylate-based moisture-absorbing exothermic fiber is a crosslinked acrylic fiber. Here, the crosslinked acrylic fiber is a fiber formed of an AN polymer containing 40% by weight or more, preferably 50% by weight or more of acrylonitrile (AN) as a starting fiber. The AN polymer may be either an AN homopolymer or a copolymer of AN and other monomers. Other monomers include vinyl halides and vinylidene halides; acrylic acid esters; sulfonic acid-containing monomers such as methallyl sulfonic acid and p-styrene sulfonic acid and salts thereof; carboxylic acids such as methacrylic acid and itaconic acid Acid-containing monomers and their salts; monomers such as acrylamide, styrene, vinyl acetate, and the like.

Furthermore, the following structure can be illustrated as a moisture absorption exothermic fiber.
For example, a fiber to which a polymer compound having a hygroscopic exothermic property is attached can be used as the hygroscopic exothermic fiber. Examples of the polymer compound having hygroscopic exothermic properties include a polymer of vinyl carboxylic acid and vinyl monomer (see JP 2002-212880 A).
Further, a spun yarn containing 30% or more of a hygroscopic exothermic fiber such as an acrylic fiber can be used as the hygroscopic exothermic fiber (see JP 2003-227043 A).

  In FIG. 2, a woven fabric having a two-layer structure is illustrated as the skin body 35. This fabric has two pairs of warp and weft yarns. Although not shown in the cross section shown in the figure, the warp yarns connect the surface layer and the back layer at regular intervals, and a single fabric is formed by the two layers of the front and back surfaces. The arrangement of the front and back of the yarn is not interchanged. The hygroscopic heating fiber 43 is arranged as a weft thread (Y3) located in the ventilation portion 37 on the back side of the skin main body 35. Therefore, the hygroscopic heating fiber 43 is not exposed on the surface constituting the seat surface 13a. As the warp yarn (T1, T2) on the front and back sides and the weft yarn (Y1) on the front surface side and the weft yarn (Y2) located on the airflow suppressing portion 39 on the back surface side, the first constituent fiber 45 is disposed. Yes.

  According to the seat cover 31 having such a configuration, the ventilation suppressing unit 39 suppresses the ventilation in the thickness direction of the water vapor emitted from the seated person. Therefore, as shown schematically by a two-dot chain line arrow in FIG. Water vapor concentrates on the portion 37. And in the ventilation part 37, the moisture absorption heat generating fiber 43 absorbs moisture and generates heat. Therefore, according to the seat cover 31 of the present embodiment, more water vapor is supplied to the moisture-absorbing heating fibers 43 in the ventilation portion 37 than in the case where the ventilation suppression portion 39 is not provided around the ventilation portion 37. The amount of heat generated can be increased. For this reason, the seated person can surely feel warmth. In fact, even if only the ventilation portions 37 scattered in the warm region W generate heat, the seat occupant feels as if almost the entire region W is generating heat by reliably feeling the heat generation. You can feel it. Therefore, in the seat cover 31 of the present embodiment, the hygroscopic heating fiber 43 is included only in the ventilation portion 37 that is a part of the surface direction of the seat cover 31, and the amount of use can be reduced, but more. It is possible for the seated person to experience warmth without fail.

  Further, in the seat cover 31 of the present embodiment, the hygroscopic heating fiber 43 is disposed on the back side that is not exposed to the seating surface 13a, so that the hygroscopic heating fiber 43 can be prevented from being worn and the hygroscopic heating performance can be maintained. It is possible.

It should be noted that various other embodiments can be considered within the scope of the present invention without departing from the gist of the present invention.
The arrangement of the hygroscopic heating fibers 43 in the skin main body 35 is preferably a position that is not exposed to the seating surface 13a from the viewpoint of preventing wear, but may be exposed to the seating surface 13a.
Moreover, in the said embodiment, although the fabric of the two-layer structure woven was illustrated as the skin main body 35, using the fabric (fabric) containing various forms, such as a jersey, a tricot, a nonwoven fabric, a moquette, a knitted fabric other than a fabric, is used. it can. Further, even when a woven fabric is used as the skin main body 35, it is not limited to the multilayer structure including the two-layer structure as in the above embodiment, and may be a single-layer structure. If the fabric constituting the skin body 35 has a multi-layer structure, and the portion of the constituent fiber that is not exposed to the seating surface 13a is replaced with the hygroscopic heating fiber 43, the hygroscopic heating fiber 43 is not exposed to the seating surface 13a at the fabric manufacturing stage. It is preferable in that it can be included.
In addition, as means for including the hygroscopic heating fiber 43 in the skin main body 35, it may be included as a constituent fiber of the fabric constituting the skin main body 35 as in the above embodiment, or may be sewn into the fabric later. It may be added and held.
Further, the hygroscopic heating fiber 43 is disposed at least in the ventilation portion 37, but the arrangement position thereof does not need to be strictly controlled only by the ventilation portion 37 defined by the presence or absence of the film structure 41. It does not matter if it reaches the surroundings.
The arrangement of the ventilation part 37 and the ventilation suppression part 39 in the warm region W is not limited to the arrangement form as in the above embodiment. The ventilation part 37 and the ventilation suppression part 39 should just be arrange | positioned adjacently, for example, in the ventilation suppression part 39, the ventilation part 37 can be arrange | positioned in striped form, a grid | lattice form, or a dot form.
Further, the warm region W may be set to a part of the seat surface 13a as in the above embodiment, or may be set to the entire surface. The warm region W can be set not only on the seat surface 13a but also on the backrest surface 15a on the front surface of the seat back 15.
In the above embodiment, although not shown in the drawings, in the seat cover 31 of the present embodiment, the surface (back surface) opposite to the seat surface 13a of the skin material 33 is soft on the surface (softness of cushioning) and is not retained. For the purpose of ensuring formability, a cover pad made of a foamed urethane sheet or the like can be appropriately laminated.

  First, in order to construct a woven fabric as the skin body, a polyester fiber as the first constituent fiber and an acrylate fiber (Toyobo Co., Ltd. “Moiscare” (registered trademark)) as the moisture-absorbing heat-generating fiber are prepared. As a coating material to be applied to the back surface of the polyester, a polyester coating material was prepared. The test piece of the skin material of 1-4 was created. As shown in FIG. 3, the size of each test piece 49 is 100 mm × 100 mm, a central 20 mm × 20 mm region is referred to as a region A, and a region other than the region A is referred to as a region B. A 90 mm × 90 mm area at the center of the test piece is referred to as a test area E.

  No. In No. 1, a woven fabric composed only of polyester fibers and containing no moisture-absorbing exothermic fibers was formed in region A and region B, and a test piece was formed without forming a coating film on the back surface. No. In No. 2, a fabric containing 11.9% of moisture-absorbing exothermic fibers uniformly in addition to polyester fibers was prepared in both regions A and B, and a test piece was formed without forming a coating film on the back surface. No. In No. 3, a woven fabric containing 11.9% of moisture-absorbing exothermic fibers in addition to polyester fibers was prepared in both regions A and B, and a coating film was formed on the back surface only in region B to obtain test pieces. No. 4, the region A contains 50% of moisture-absorbing exothermic fibers in addition to the polyester fibers, the region B is a woven fabric composed only of the polyester fibers, and a coating film is formed on the back surface only in the region B to obtain a test piece. . In addition, No. including hygroscopic exothermic fiber. In Nos. 2 to 4, when producing the woven fabric, as shown in FIG. 2, the hygroscopic exothermic fibers were arranged on the back side not exposed to the surface.

  Next, using the simulated exothermic sweating device 51 shown in FIGS. About each test piece 49 of 1-4, the raise temperature in the area | region A when the test area | region E containing the area | region A and the area | region B was exposed to water vapor | steam was measured.

  The simulated exothermic sweating device 51 includes a plate-shaped heating member 53, a tube-shaped water supply line 55, and a cloth-shaped simulated skin 57. The heating member 53 includes a 100 mm square copper plate 53a and a rubber heater 53b which is a planar heat source placed on the upper surface of the copper plate 53a. Then, as shown in FIG. 5, a polyester cloth is attached as a pseudo skin 57 on the lower surface of the copper plate 53 a constituting the heating member 53. A through hole 53h is formed at the center of the heating member 53 and is fixed in a state where the water supply line 55 is inserted.

  The measurement was performed in a room at 23 ° C. and 50% RH. In the measurement, the test piece 49 was placed on the seat pad 61 so that the moisture-absorbing and heating fibers were not exposed on the surface, and the pseudo exothermic sweating device 51 was installed thereon via the space holding jig 59. . The space holding jig 59 is a square frame member made of acrylic, and has an inner dimension of 90 mm × 90 mm and a height of 10 mm. This pseudo holding device 59 is placed on the test piece 49 so that the region A of the test piece 49 is located in the center of the frame, and the pseudo-heated sweating device so that the pseudo skin 57 faces the test piece 49. 51 was placed. Then, 0.3 ml / h of water was continuously supplied to the artificial skin 57 by the pump P through the water supply line 55 while the copper plate 53a was heated to 37 ° C. with the rubber heater 53b. Thereby, water soaks into the artificial skin 57, is vaporized by being heated by the heating member 53, and diffuses into the space S partitioned by the space holding jig 59 as water vapor. Therefore, the 90 mm × 90 mm region partitioned by the space holding jig 59 of the test piece 49 is exposed to water vapor diffused in the space S. That is, the portion exposed to the water vapor is the test region E. The temperature of the region A was measured from the surface side at the center of the test piece 49, and the rising temperature was calculated as the difference from the initial temperature. No. The maximum value of the rising temperature is shown in FIG. FIG. 7 shows the change over time in the rising temperature for 2-4. Note that the temperature of the test piece 49 is measured by a thermocouple 63 that is submerged in the space S from under the space holding jig 59, and the gap between the space holding jig 59 and the test piece is a rubber tape (not shown). ) To separate the space S from the outside.

  As apparent from FIG. 6, No. containing no hygroscopic exothermic fiber. No increase in temperature was observed in No. 1, whereas no. In each of 2 to 4, a temperature increase was observed, and it was confirmed that the moisture-absorbing exothermic fibers proceeded even when the moisture-absorbing exothermic fibers were not exposed on the surface of the test piece exposed to water vapor, and the moisture-absorbing exothermic fibers reached. It was done.

The composition of the woven fabric is common, and the composition differs only in the presence or absence of the coating film on the back surface. 2 and No. 3, as is clear from FIG. 6, a coating film is formed only in the region B and no coating film is formed in the region A. No. 3 where the maximum temperature rise in region A was 2 ° C. Compared to 2, a temperature increase of 2 times was observed. Thereby, by restricting the ventilation in the thickness direction in the area other than a part of the area in the surface direction exposed to the water vapor, the water vapor concentrates in a part where the ventilation is not restricted, and the moisture-absorbing heating fiber contained in the part. It was confirmed that the amount of heat generated by can be increased.
As is clear from FIG. In No. 3, the rise in temperature reached the maximum in about 6 minutes. In 2, it took about 7.5 minutes for the temperature rise to reach a maximum. As a result, it was found that in a part where the ventilation is not regulated, the hygroscopic exothermic fiber efficiently contacts with the water vapor, the rate of the hygroscopic exothermic reaction is improved, and the temperature rises quickly.

Moreover, the point which formed the coating film only in the area | region B is common, and the structure of a textile fabric differs. 3 and no. 4 and No. 4, as is clear from FIG. No. 4 had a higher maximum temperature rise. This is no. 3 is No.3. 4, the amount of moisture-absorbing exothermic fibers contained in the entire test region E is large, but it is uniformly contained in the regions A and B. 4, the amount of moisture-absorbing exothermic fibers contained in the entire test area E is small, but the moisture-absorbing exothermic fibers are concentrated only in the area A, so This is probably because it is higher than 3. From this result, it is possible to concentrate the hygroscopic exothermic fiber only on the part where the ventilation is not restricted, thereby suppressing the content of the hygroscopic exothermic fiber contained in the entire epidermis body, while increasing the part where the hygroscopic exothermic fiber is arranged. It became clear that the temperature could be increased.
As is clear from FIG. In No. 4, no. The rising temperature reached its maximum in about 5 minutes earlier than 3. As a result, it has been clarified that the temperature rises more quickly by increasing the content of the moisture-absorbing exothermic fiber in a part where the ventilation is not restricted.

DESCRIPTION OF SYMBOLS 11 Vehicle seat 13 Seat cushion 13a Seat surface 21 Seat pad 31 Seat cover 33 Skin material 35 Skin main body 37 Ventilation part 39 Ventilation suppression part 41 Film structure 43 Hygroscopic heat generation fiber 45 1st component fiber 49 Test piece

Claims (2)

A vehicle seat cover that covers a seat pad that forms a seating surface of a vehicle seat,
The skin material comprising the seating surface is provided, and the skin material has a skin body whose surface constitutes the seating surface, and in the surface direction of the skin material, a coating structure is formed on the back surface of the skin body. Is formed, and a ventilation portion without a film structure is set on the back surface of the skin body, and at least in the ventilation portion, moisture absorbing heat generating fibers are formed on the skin body. A vehicle seat cover characterized by being included. The vehicle seat cover according to claim 1,
The vehicular seat cover, wherein the moisture-absorbing heat-generating fiber is not exposed on a surface constituting the seating surface of the skin main body.

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