JP2016214737A - Seat for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat cover with excellent and partially different elongation characteristics.SOLUTION: A seat cover includes less extensible portions and a greatly extensible portion 21a, both of which have at least one of a stitch formed of a loop of a predetermined length of thread material Y1 and an other stitch R2 formed of a loop of a longer thread material Y1 than that of the stitch, and are configured to have the same numbers of stitches per a predetermined area in both of course and wale directions. In addition, the greatly extensible portion 21a has a greater number of the other stitches R2 compared to the less extensible portion so as to be more extensible.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vehicle seat in which a seat cover that covers a seat pad has a low stretch portion and a high stretch portion that is easier to stretch than a low stretch portion.

  In this type of vehicle seat, there is a demand to partially vary the elongation characteristics of the seat cover from the viewpoint of improving seat performance. For example, by making the seat cover portion in contact with the occupant easy to extend, the fit to the occupant can be improved. Moreover, the support performance with respect to the passenger | crew at the time of curve driving | running | working improves by making the side part of a seat cover difficult to extend. For example, a vehicle seat disclosed in Patent Document 1 includes a seat pad that elastically supports an occupant by forming a seat outer shape, and a woven or knitted seat cover that covers the seat pad. Therefore, a first portion where the thread material is densely arranged and a second portion where the yarn material is sparsely arranged and easily stretched compared to the first portion are formed in the seat cover. As described above, according to the known technique, the thread material forming the seat cover is appropriately arranged in a coarse and dense manner, so that the seat cover can be made partially stretchable or difficult to stretch.

Japanese Patent Laying-Open No. 2015-2830

  However, in the configuration of the known technique, the thread material of the seat cover is relatively coarsely arranged in the second portion, so there is a concern that the rigidity of the seat cover is reduced and the support performance is deteriorated. For this reason, the configuration of the known technology has not been a configuration that can be easily adopted from the viewpoint of improving the passenger support performance. The present invention has been devised in view of the above points, and the problem to be solved by the present invention is to partially vary the elongation characteristics of the seat cover with good performance.

  As means for solving the above problems, a vehicle seat according to a first aspect of the present invention includes a seat pad that elastically supports an occupant with a seat outer shape, and a knitted seat cover that covers the seat pad. In the present invention, the seat cover has a low stretch portion and a high stretch portion that is easier to stretch than the low stretch portion. In this type of seat configuration, the stretch characteristics of the seat cover are partially different with good performance. Is desirable.

  Therefore, in the present invention, at least one of the low-stretched portion and the high-stretched portion is a stitch formed by a loop of yarn material having a predetermined length and another stitch formed by a loop of yarn material longer than the stitch. In addition, the number of stitches per predetermined area in the course direction and the wale direction is the same, and the high stretched portion has more other stitches than the low stretched portion and is easily stretched. In the present invention, since the high extension portion has the same number of stitches (number of stitches) as that of the low extension portion, it is possible to preferably avoid the relative decrease in rigidity. On top of that, the high stretch portion has more other stitches formed of relatively long thread material loops and is easier to stretch than the low stretch portion, so that it has a good fit for the occupant. Can be improved.

  The vehicle seat of the second invention is the vehicle seat of the first invention, wherein at least a part of the yarn material forming the seat cover is a yarn material processed to be bulky, and the yarn material processed to be bulky is highly stretched Place it across the part and the low extension part. In the present invention, the soft and bulky processed yarn material makes the boundary between the low stretch portion and the high stretch portion ambiguous, resulting in a sheet structure with excellent design.

  According to the first aspect of the present invention, the elongation characteristics of the seat cover can be partially varied with good performance. Further, according to the second invention, the elongation characteristics of the seat cover can be partially varied with better performance.

It is a front view of a vehicle seat. It is a front view of a low extension part. It is a front view of a high extension part. It is a front view of another high extension site.

Hereinafter, embodiments for carrying out the present invention will be described with reference to FIGS. In each figure, a reference symbol UP is attached above the vehicle seat and a reference symbol DW is attached below the vehicle seat, as appropriate. 2 to 4, the plurality of stitches shown in each drawing are all stitches having the same loop length. However, in order to clearly show the arrangement relationship between stitches, each stitch shown in the center is indicated by a thick line. Each stitch shown on the end side is indicated by a thin line. The vehicle seat 2 in FIG. 1 includes a seat cushion 4, a seat back 6 that is connected to the seat cushion 4 in a tiltable manner, and a headrest 8. Each of these seat components includes a seat frame (4F, 6F) that forms a seat skeleton, a seat pad (4P, 6P) that elastically supports an occupant by forming a seat outer shape, and a seat cover that covers the seat pad ( 4S, 6S). Here, the seat pads (4P, 6P) are typically substantially rectangular members, and can be formed of a foamed resin such as polyurethane foam (density: 10 kg / m ^{3 to} 60 kg / m ³ ).

  In this embodiment, with reference to FIG. 1, the lower part of the seat back 6 is connected to the rear part of the seat cushion 4 so that it can be tilted. A headrest 8 is integrally provided on the upper portion of the seat back 6. The headrest 8 is configured by the upper center of the seat back 6 protruding upward. A pair of hole portions H is provided between the seat back 6 and the headrest 8 from the viewpoint of improving design properties, and the pair of hole portions H are arranged in parallel in the seat width direction.

[Seatback]
The seat back 6 has the above-described basic configuration (6F, 6P, 6S) and is divided into a top plate main portion 6a and a pair of top plate side portions 6b. Here, the top plate main portion 6a is a central portion of the seat back 6 in the seat width direction, and extends in the vertical direction of the seat with the seat back standing up as a reference. Each of the top plate side portions 6b is a portion disposed on both sides of the top plate main portion 6a in the seat width direction and extends in the seat vertical direction with the seat back standing up as a reference. Each of the top plate side portions 6b protrudes toward the seating side from the top plate main portion 6a, and can support the occupant side portion during a curve run or the like.

[Seat cushion]
The seat cushion 4 has the above-described basic configuration (4F, 4P, 4S) and is divided into a top plate main portion 4a and a pair of top plate side portions 4b. Here, the top plate main portion 4a is a central portion of the seat cushion 4 in the seat width direction and extends in the seat front-rear direction. Moreover, each top plate side part 4b is a site | part arrange | positioned on the both sides of the top plate main part 4a in a sheet | seat width direction, respectively, and is extended in a sheet | seat front-back direction. Each of the top plate side portions 4b protrudes more toward the seating side than the top plate main portion 4a, and can support the occupant side portions when traveling on a curve or the like.

[Seat Cover]
In the present embodiment, the seat cover 6S of the seat back 6 is composed of a single knitted fabric, which will be described later, and is disposed across the top plate main portion 6a and the top plate side portion 6b. The seat cover 6S has a low extension part 10a, which will be described later, and a plurality of high extension parts (first high extension part 21a, second high extension part 22a), and the extension characteristics differ for each part. Similarly, the seat cover 4S of the seat cushion 4 is also composed of a single knitted fabric, and is disposed across the top plate main portion 4a and the top plate side portion 4b. The seat cover 4S also has a low extension part 10b, which will be described later, and a plurality of high extension parts (first high extension part 21b, second high extension part 22b), and the extension characteristics differ for each part.

  That is, in the vehicle seat 2, from the viewpoint of improving seat performance, the low extension portions 10a and 10b are relatively difficult to extend, and the high extension portions 21a, 22a, 21b, and 22b are relatively easy to extend. It is said. In this way, in this embodiment, the stretch characteristics of the seat covers 4S and 6S are partially made different from the viewpoint of improving the seating property of the seat, but in this type of seat configuration, the stretch of the seat covers 4S and 6S is different. It is desirable to have different characteristics with good performance. Therefore, in the present embodiment, the elongation characteristics of the seat covers 4S and 6S are made different from each other with good performance by the configuration described later. Hereinafter, each configuration will be described in detail.

[Low extension / high extension of seat back]
In the seat cover 6S of FIG. 1, the low extension portion 10a can be provided on the side of the seat cover 6S in the seat width direction and a part of the center of the seat cover 6S. The low extension portion 10a on the side portion of the seat cover 6S is continuously formed in the seat vertical direction, and is disposed exclusively on both sides of the headrest 8 and the top plate side portion 6b. The low extension portion 10a at the center of the seat cover 6S is a belt-like portion that crosses the top plate main portion 6a in the seat width direction, and is disposed below the top plate main portion 6a while being substantially U-shaped.

  Further, the high extension part (the first high extension part 21a, the second high extension part 22a) can be provided in the center of the seat cover 6S excluding the formation part of the low extension part 10a. Here, the first high extension part 21a is a part that is more easily extended than a low extension part 10a described later, and the second high extension part 22a is a part that is more easily extended than the first high extension part 21a. And the 1st high extension site | part 21a is a semi-elliptical site | part provided in the lower center of the top-plate main part 6a, The above-mentioned low extension site | part 10a arrange | positions in the cross shape in the part. The second high extension part 22a is provided at the upper part of the top plate main portion 6a above the first high extension part 21a and at the center of the headrest 8 in the seat width direction. The second high extension portion 22a of the top plate main portion 6a has a substantially rectangular shape with the lower portion recessed in a circular shape when viewed from the front, and the portion below the hole H as viewed in the sheet width direction is slightly narrow. The shape is wide on the way to the bottom.

[Low extension / high extension of seat cushion]
In the seat cover 4S of FIG. 1, the low extension part 10b can be provided in the side part of the seat cover 4S. The low extension portion 10b on the side of the seat cover 4S is formed continuously in the front-rear direction of the seat, and is disposed outside each top plate side portion 4b in the seat width direction. Moreover, the high extension part (the 1st high extension part 21b, the 2nd high extension part 22b) can be provided in the seat cover 4S side part except the seat cover 4S center and the formation part of the low extension part 10b. The first high extension part 21b in the center of the seat cover 4S is a substantially rectangular part in which the front part arranged in the rear part of the top plate main part 4a has a semicircular shape, and both sides in the seat width direction are on the top side part 4b. Arrange to protrude. Moreover, the 2nd high extension site | part 22b can be provided in the front part of the top-plate main part 4a and the inner side of each top-plate side part 4b so that the 1st high extension site | part 21b may be enclosed.

[Formation of seat cover]
In this embodiment, with reference to FIGS. 2-4, the knitted fabric as sheet covers 4S and 6S is formed using the thread material Y1. The knitted fabric as the seat covers 4S and 6S may be either warp knitting or weft knitting. Here, examples of the weft knitting include a basic structure (flat knitting, rubber knitting (rib knitting), pearl knitting) and its changing structure. Examples of warp knitting include a basic organization (Denby knitting, code knitting, atlas knitting, chain knitting) and its changing organization. In the present embodiment, since the seat cover 6S of the seat back 6 and the seat cover 4S of the seat cushion 4 are formed by substantially the same knitting method, the seat cover 6S of the seat back 6 will be described below as an example. .

  Here, examples of the yarn material Y1 include plant-based and animal-based natural fibers, chemical fibers made of a thermoplastic resin or a thermosetting resin, and mixed yarns thereof. The yarn material Y1 may be a wire material of the above material, and examples thereof include spun yarn, filament, drawn yarn, bulky processed yarn material (Mole yarn, Taslan processed yarn, false twisted yarn, covering yarn, etc.). . In particular, it is preferable to use a bulk material processed to be bulky as this type of thread material Y1. Then, by arranging the yarn material Y1 as the thread material processed to be bulky so as to straddle the low extension portion 10a and the high extension portions 21a and 22a, the boundary between the adjacent portions becomes ambiguous. For this reason, by using the thread material processed to be bulky for at least a part of the thread material of the seat cover 6S, the seat cover 6S has a similar external appearance and an excellent design.

  Then, for example, using a flat knitting machine, a flat knitted fabric as the seat cover 6S is created with reference to FIGS. At this time, in the present embodiment, the number of stitches (number of stitches) per predetermined area in the course direction X and the wale direction Y is set to be the same in the low stretch portion 10a and the high stretch portions 21a and 22a. The density of the yarn material Y1 is substantially the same. Thus, since each high extension site | part 21a, 22a has the same number of eyes as the low extension site | part 10a, and having an equivalent density, it can avoid suitably that rigidity falls extremely comparatively suitably. The predetermined area is, for example, the area of the seat cover portion surrounded by a square of 1 inch vertically and horizontally.

  Further, in the present embodiment, referring to FIG. 2, all the knitted fabrics are formed by the stitch R1 formed by the loop of the yarn material Y1 having the predetermined loop length L1 in the low elongation portion 10a. 3 and 4, in each of the high stretch portions 21a and 22a, other stitches (medium stitch R2, large stitch R3) formed by a loop of yarn material Y1 that is longer than stitch R1 are used. To form a knitted fabric. That is, referring to FIG. 3, in the first high stretch portion 21a, all the knitted fabrics are formed by the middle stitch R2 formed by the loop of the yarn material Y1 having the loop length L2 (L2> L1). Further, referring to FIG. 4, in the second high stretch portion 22a, all the knitted fabrics are formed by the large stitch R3 formed by the loop of the yarn material Y1 having the loop length L3 (L3> L2). As described above, in the present embodiment, the other stitches R2 and R3 forming the high stretch portions 21a and 22a have relatively long loop lengths, so that they are more easily stretched than the low stretch portion 10a. . Furthermore, since the large stitch R3 of the second high extension portion 22a has the longest loop length, it is more easily extended than the low extension portion 10a.

  Here, a pad material and a backing material (both not shown) can be provided on the back surface of the seat cover 6S as necessary. The pad material is a surface-like or mat-like member that can elastically expand and contract. Examples of the material of this type of pad material include slab urethane, cotton material, and 3D net body (member formed by knitting fibers in a three-dimensional shape). The backing material is a planar member disposed on the back side of the seat cover 6S. Examples of the material of the backing material include fabrics (woven fabrics, knitted fabrics, nonwoven fabrics) and leathers (natural leathers, synthetic leathers) made of natural fibers or synthetic fibers, and typically formed of a material having higher rigidity than the seat cover 6S. it can. And after laminating | stacking at least one of a pad material and a backing material on the back surface of the seat cover 6S, these can be integrated by techniques, such as adhesion | attachment, melt | fusion, and stitching | suture.

[Use of vehicle seats]
Referring to FIG. 1, when the occupant leans against the seat back 6, the occupant back strongly presses the top plate main portion 6a. At this time, since each high extension part 21a, 22a of the top plate main part 6a is extended moderately and fits a passenger | crew, it becomes a seat structure excellent in seating property. In particular, in the present embodiment, the first high extension portion 21a has moderate easiness of extension and is firmly supported while fitting to the back of the occupant. Further, the second high extension part 22a is made easier to extend than the first high extension part 21a, and fits flexibly to the occupant's neck or the like. Further, the occupant's waist that is in contact with the lower portion of the top plate main portion 6a is firmly supported by the low extension portion 10a of the top plate main portion 6a. And the passenger | crew at the time of curve driving | running | working can be firmly supported by the low expansion | extension site | part 10a of the top-plate side part 6b.

  Further, when the occupant sits on the seat cushion 4, the occupant's heel strongly presses the top plate main portion 4a. At this time, since each high extension part 21b, 22b of the top plate main part 4a is extended moderately and fits a passenger | crew, it becomes a seat structure excellent in seating property. In particular, in the present embodiment, the first high extension portion 21a has an appropriate ease of elongation and is firmly supported while fitting to the occupant's buttocks. Further, the second high extension portion 22b is made easier to extend than the first high extension portion 21b, and fits flexibly to the occupant legs. And the passenger | crew at the time of curve driving | running | working can be firmly supported by the low expansion | extension site | part 10b outside the top plate side part 4b.

  As described above, in the present embodiment, each of the high extension portions 21a and 22a (21b and 22b) has the same number of eyes as the corresponding low extension portion 10a (10b), so that the rigidity is extremely reduced. This can be suitably avoided. In addition, each of the high stretch portions 21a and 22a (21b and 22b) has other stitches R2 and R3 formed by loops of a relatively long yarn material Y1 as compared with the corresponding low stretch portions 10a (10b). By making it easy to stretch with a large amount, it is possible to suitably improve the fit to the occupant. Further, in the present embodiment, the soft and bulky processed yarn material Y1 makes the boundary between the high extension portions 21a and 22a (21b and 22b) corresponding to the low extension portions 10a (10b) vague, and the boundary line It becomes the sheet | seat structure excellent in the design property provided with the blurring effect with respect to. For this reason, according to this embodiment, the elongation characteristics of the seat covers 4S and 6S can be varied with high performance.

[Test example]
Hereinafter, although this embodiment is described based on a test example, the present invention is not limited to the test example. Details of the knitted fabrics of Examples 1 and 2 and Comparative Example 1 are shown in [Table 1] described later. In addition, [Table 2] and [Table 3] show details of the knitted fabrics of Examples 3 to 7, and [Table 4] shows results of each test in the knitted fabrics of Examples 3 to 7.

[Example 1]
In Example 1 shown in [Table 1], using a flat knitting machine (model SWG091N ₂ (15 gauge type) manufactured by Shima Seiki Co., Ltd.), a flat knitted fabric (deformed rib knitting) as a seat cover was created. Also, a knitted yarn having a fineness of 853 dtex (product name: NJ42, material: polyethylene terephthalate (PET)) having a fineness of 853 dtex was used as a knitted yarn material. In each of the low extension part and each high extension part, the number of vertical (wealth) eyes was set to 16 / inch, and the number of horizontal (course direction) eyes was set to 39 / inch. And in the low extension part, all the knitted fabrics were formed with the stitch formed with the loop of the thread material of loop length 3.8mm. Further, in the first high stretch portion, all the knitted fabrics are formed by the medium stitch formed by the loop of the yarn material having a loop length of 4.1 mm, and in the second high stretch portion, the loop of the yarn material having the loop length of 4.4 mm is formed. All the knitted fabrics were formed by the large stitches formed in.

  Then, a hot melt nonwoven fabric as a backing base fabric and slab urethane as a pad material were stacked on the back surface of the seat cover, and these were bonded by a 140 ° C. hot roller. The product name Dynac (product number: LNS3010) manufactured by Kureha Tech was used as the hot melt nonwoven fabric, and the product name EL60SF (thickness: 5 mm) manufactured by INOAC Corporation was used as the slab urethane.

[Example 2]
In Example 2 shown in [Table 1], all the knitted fabrics were formed by stitches formed by loops of a thread material having a loop length of 3.8 mm at a low extension portion. Further, in the first high extension portion, all the knitted fabrics are formed by the medium stitch formed by the loop of the yarn material having a loop length of 4.4 mm, and in the second high extension portion, the loop of the yarn material having a loop length of 4.9 mm is formed. All the knitted fabrics were formed by the large stitches formed in. Other conditions were the same as in Example 1, but the adhesion between the hot melt nonwoven fabric and the slab urethane was omitted.

[Examples 3 to 7]
In Examples 3 to 7, yarn materials shown in [Table 2] were used, and knitted fabrics were created under the conditions shown in [Table 3]. In the knitted fabrics of Examples 3 to 7, one low stretch portion and one high stretch portion were created, and the other conditions were the same as in Example 1. Further, as the molding yarn of Example 3, a molding yarn (material: PET) purchased from Moririn Co., Ltd. was used, and as the molding yarn of Example 4, a thread material made by Toray Industries, Inc., product name: NJ42, material: PET was used. . Moreover, the slatin processed yarn (material: PET) purchased from Moririn Co. was used as the slatted processed yarn of Example 5, and the slatin processed yarn of Example 6 was manufactured by Kawabo Textured Co., Ltd., product name: ORL670SD, material: PET. Thread material was used. Further, as a normal PET yarn of Example 7, a thread material manufactured by Toray Industries, Inc., product name: B20N was used.

[Comparative Example 1]
In the knitted fabric of Comparative Example 1 shown in [Table 1], all the knitted fabrics were formed by stitches formed by loops of a thread material having a loop length of 3.8 mm. Other conditions were the same as in Example 1.

[Ride comfort sensory test]
In this test, the knitted fabric of Example 1 and the knitted fabric of Comparative Example 1 were used as seat covers, respectively, and the riding comfort was confirmed. That is, with reference to FIG. 1, after each knitted fabric was attached to a seat pad (made of polyurethane foam, density 30 kg / m ³ , thickness 20 cm), riding comfort when seated in a static state was confirmed. At this time, in the knitted fabric of Example 1, the low extension portion and each high extension portion were arranged in the arrangement shown in FIG.

[Confirmation test of flatness of knitted fabric]
As a sample for evaluation in this test, A4 size knitted fabrics of Examples 3 to 7 were prepared. In the center of each of these samples for evaluation, a substantially circular (φ100) high extension portion was formed, and a low extension portion was formed around it. Then, the evaluation sample was placed on a flat test stand, and the distance between the knitted surface and the top of the convex portion that protruded most from the knitted surface was measured, and these distances were defined as the “convex distance”. (See [Table 4]). This convex portion is formed by a loop of yarn material at a high extension portion, and the shorter the “distance of the convex portion” is, the flatter the knitted fabric is.

[Simple Lamination Processing Test (Flaw Generation Confirmation Test)]
As a sample for evaluation in this test, A4 size knitted fabrics of Examples 3 to 7 were prepared. In the center of each of these samples for evaluation, a substantially circular (φ100) high extension portion was formed, and a low extension portion was formed around it. And the slab urethane of Example 1 was piled up on the back surface of the knitted fabric of each Example, and it adhered by the steam (about 110 degreeC) of the steam iron. And the presence or absence of the wrinkle of the slab urethane in each knitted fabric was confirmed visually. In this test, “皺” was evaluated when no slab urethane could be confirmed, and “△” was evaluated when 皺 was confirmed (see [Table 4]).

[Borderline visibility check test]
As an evaluation sample for this test, the same evaluation sample as that for the confirmation test of the flatness of the knitted fabric was used. The knitted fabric was visually confirmed from a place 1 m away from the knitted fabric. The knitted fabric was visually confirmed from a place 10 cm away from the knitted fabric. In this test, “◎” when the boundary line between the low extension part and the high extension part could not be confirmed, and “○” when the boundary line was difficult to see (when the boundary line was blurred and vague). When the boundary line was confirmed, it was evaluated as “Δ” (see [Table 4]).

[Knitting test]
In this test, in the knitting of the knitted fabrics of Examples 3 to 7, “◯” was evaluated when the knitting was successful, and “X” was evaluated when the knitting could not be knitted due to yarn breakage or the like ( (See Table 4).

[Results and discussion]
In Comparative Example 1, the entire knitted fabric had uniform elongation characteristics, and the elongation characteristics could not be partially changed. In addition, as a result of the ride comfort sensory test, the knitted fabric of Comparative Example 1 was inferior in fit because the rebound to the buttocks and upper back was strong, and the sitting comfort was not good.

  In contrast, in the knitted fabrics of Example 1 and Example 2, it was possible to suitably vary the stretch characteristics between the low stretch portion and each high stretch portion. This result is thought to be because each highly stretched portion has other stitches formed of relatively long yarn material loops to facilitate stretching. Furthermore, in Example 1, the surface of the knitted fabric became substantially flat, and the hot melt nonwoven fabric and the slab urethane could be favorably bonded to the back surface thereof. As a result of the ride comfort sensory test, in the knitted fabric of Example 1, there was a sinking into the buttocks and thighs, the fit feeling was improved, and the ride comfort was also improved. And according to the knitted fabrics of Examples 1 and 2, since each high stretch portion has the same number of stitches (number of stitches) as the low stretch portion, it is preferable that the rigidity is extremely lowered relatively. It was easily predicted that it could be avoided. For this reason, according to Examples 1 and 2, it was found that the elongation characteristics of the seat cover could be varied with good performance.

  Moreover, with reference to the result of the simple laminating test of [Table 4], in the knitted fabrics of Examples 3 to 7, occurrence of wrinkles of slab urethane was suppressed to some extent. In Example 7, the loop length difference is 0.9 mm or less, and also in Examples 3, 4 and 6, the occurrence of wrinkles during simple laminating is suitably suppressed if the loop length difference is 0.7 to 0.8 mm or less. It was. Particularly in Example 5, if the difference in loop length between the low extension portion and the high extension portion was 1.1 mm or less, the generation of wrinkles during the simple laminating process was suitably suppressed. This result is considered to be because the unevenness of the knitted fabric was suitably absorbed because the Taslan processed yarn of Example 5 had a lower fineness and more voids than other yarn materials.

  In addition, referring to the results of the boundary line appearance confirmation test in [Table 4], in the knitted fabrics of Examples 3 to 6 using the yarn material processed to be bulky, the boundary line between the low stretch portion and the high stretch portion is It became ambiguous and found that there was a “blurring effect” on the boundary. Further, as a result of the visibility check test at a short distance, the loop length difference is longer in Example 6 than in Example 3 (Mole yarn) and Example 6 (Taslan processed yarn) having the same fineness. The result showed no difference with respect to the boundary line. From this, it was found that the knitted fabric using Taslan processed yarn has a particularly excellent “blurring effect”. Further, when Example 5 and Example 6 were compared, Example 6 showed no difference with respect to the boundary line even when the loop length difference was longer. From this, it was found that a knitted fabric using a yarn material having a high fineness has an excellent “blurring effect”.

  And with reference to the result of the knitting property test of [Table 4], all of the knitted fabrics of Examples 3 to 7 could be knitted suitably without causing yarn breakage or the like. From this result, it was found that the knitting can be performed without any problem when the loop length difference is in the range of 0.3 to 1.4 mm.

  The vehicle seat of the present embodiment is not limited to the above-described embodiment, and can take other various embodiments. In the present embodiment, the configuration (shape, dimensions, formation position, number of formation, etc.) of each of the high extension portions 21a, 22a (21b, 22b) and the low extension portion 10a (10b) is exemplified, but the configuration of each portion is limited. It is not the purpose. That is, it is possible to form a plurality of or a plurality of low stretch portions and one or a plurality of types of high stretch portions at appropriate positions of the knitted fabric as the seat cover. Further, the high stretch portion and the low stretch portion may be formed of one type of thread material or a plurality of thread materials. When forming with a plurality of thread materials, at least a part of the thread material is bulky processed, and the bulky thread material is arranged so as to cross the high stretch portion and the low stretch portion. It is preferable.

  Moreover, in this embodiment, all the knitted fabrics of the respective high stretch portions 21a, 22a (21b, 22b) and the low stretch portions 10a (10b) are formed by one type of stitch (stitch R1 or other stitches R2, R3). An example was described. Each high stretch portion and low stretch portion may have both stitches and other stitches, in which case the high stretch portion has many other stitches compared to the low stretch portion. Makes it easier to stretch. And in a high extension part, it may be formed so that a loop length may become long gradually or continuously as it leaves the boundary of a low extension part.

  The configuration of the present embodiment can be applied to all vehicle seats such as vehicles, airplanes, and trains.

2 Vehicle seat 4 Seat cushion 6 Seat back 8 Headrest 4S Seat cover 6S Seat cover 4a Top plate main portion 4b Top plate side portion 6a Top plate main portion 6b Top plate side portions 10a, 10b Low extension parts 21a, 21b First height Extension part 22a, 22b 2nd high extension part H Hole part R1 stitch R2 middle stitch R3 large stitch Y1 thread material

Claims (2)

A seat pad that elastically supports an occupant in the form of a seat, and a knitted seat cover that covers the seat pad, wherein the seat cover has a low extension portion and a height that is easier to extend than the low extension portion. In a vehicle seat having an extended portion,
The low stretch portion and the high stretch portion have at least one of a stitch formed by a loop of yarn material having a predetermined length and another stitch formed by a loop of yarn material longer than the stitch. The number of eyes per predetermined area in the course direction and the wale direction is the same,
The vehicle seat in which the high stretch portion has a larger number of other stitches than the low stretch portion and is easily stretched. 2. The thread material according to claim 1, wherein at least a part of the thread material forming the seat cover is a thread material processed to be bulky, and the thread material processed to be bulky is disposed across the high stretch portion and the low stretch portion. Vehicle seat.

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