JP2019064351A - Vehicle seat - Google Patents

Abstract

To provide a vehicle seat in which formation of a wrinkle on a trim cover can be suppressed while assuring a design of the trim cover.SOLUTION: A cover factor of a back side thread 43 is set to 320 to 380 and a size of a sewing thread 50 is set to 650 to 1700 T, a space between seams is set to 3 to 4 mm, and therefore, a gap K between respective back side threads provided between respective seams of the sewing thread 50 can be reduced. Consequently, when a force acts in a direction in which a first skin member 31 and a second skin member 32 are separated from each other, a warp 41, a weft 42, and the back side thread 43 are moved so as to fill the gap K between respective rear side threads 43, and thus, it can be suppressed that the warp 41, the weft 42, and the back side thread 43 are gathered near a midship part P1 between respective seams P2. As a result, formation of a wrinkle on a trim cover 30 at the seam P2 part of the sewing thread 50 can be suppressed.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a vehicle seat, and more particularly to a vehicle seat which can suppress formation of wrinkles on a trim cover while securing the design of the trim cover.

  Conventionally, for the first yarn extending in one direction, a satin weave fabric is used, in which a large number of second yarns extending in the other direction orthogonal to the first yarn appear on the surface of the fabric There is a vehicle seat provided with a trim cover (Japanese Patent Application Laid-Open No. 2000-112118).

Unexamined-Japanese-Patent No. 2010-246645 (Paragraphs 0014, 0015 etc.)

  However, it is difficult to form irregularities on the surface of the woven fabric because the woven surface of the satin weave is generally formed smoothly, and it is difficult to improve the design of the trim cover by deforming the shape of the woven surface. There is a point. In addition, although processing (for example, embossing processing) which forms unevenness in the textile surface at the separate process after manufacturing textiles can form unevenness on the textile surface, in this case, processing process different from textile manufacture Is not ideal because of the increase in manufacturing costs.

  On the other hand, as a result of intensive investigations by the applicant of the present invention to solve the above-mentioned problems, the back yarn side of the fabric has a larger denier than that of the second yarn (thicker yarn) than the second yarn. Are arranged along the second yarn, and the back yarn pushes the second yarn toward the surface of the fabric to form a concavo-convex structure on the surface of the fabric to improve the design of the trim cover. Not known in

  However, in the satin woven fabric having the back yarn, when the satin woven fabric and the other skin member are sewn together to form them as an integral trim cover, the satin woven fabric and the other skin member may be used. When sewing along the direction perpendicular to the direction of extension of the back thread, several back threads are passed between two seams (portions through which threads are stitched) (between one thread of sewing thread) . Thus, gaps between the backing threads are disposed between the stitches. Therefore, when force acts on the sewn surfaces of the satin woven fabric and the other surface skin members away from each other, the first yarn, the second yarn, and the back yarn become sewing threads so as to fill the gaps between the back yarns. The problem that a wrinkle is formed on the trim cover near the seam is newly found because the second thread near the seam is reduced by being gathered to the central portion of the thread for one pitch along the.

  The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide a vehicle seat capable of suppressing formation of wrinkles on a trim cover while securing the design of the trim cover. And

  In order to achieve this object, the vehicle seat of the present invention comprises a first skin member constituting the skin of the seat, a second skin member connected to the first skin member, and the first skin member and the second skin member. And a trim cover having a suture thread for connecting and connecting the skin members, at least one of the first skin member and the second skin member being a first thread extending in one direction, and a first thread thereof The first yarn and the second yarn of the first skin member or the second skin member having the second yarn which extends in the direction orthogonal to the yarn and appears more on the surface than the first yarn and the first yarn and the second yarn. At least a part of which is disposed on the back side of the second yarn, and the second yarn is extended in the extending direction of the second yarn, and the back yarn has a cover factor of 320 to 380 and the sewing yarn has a fineness Is set from 650T to 1700T, and the seam interval is 3mm It is set between the Luo 4mm.

  According to the vehicle seat of the present invention, at least one of the first skin member and the second skin member is extended in a direction perpendicular to the first thread, which is extended in one direction, and the first thread. And at least a portion of the first skin member or the second skin member having the second yarn and the first yarn and the second yarn, the second yarn appearing on the surface more than the first yarn, and at least a part on the back side. The back yarn is disposed and extends in the extending direction of the second yarn, the back yarn has a cover factor set to 320 to 380, and the sewing yarn has a fineness set to 650 T to 1700 T, and a seam Since the distance between the two is set between 3 mm and 4 mm, it is possible to reduce the gap between the backing threads disposed between the stitches of the sewing thread. Thereby, when force acts on the first skin member and the second skin member in the direction away from each other, the first yarn, the second yarn, and the back yarn move so as to fill the gaps between the respective back yarns. Thus, it is possible to prevent the first yarn, the second yarn, and the back yarn from being gathered near the center between the seams (the portions through which the yarns are sewn together). As a result, formation of wrinkles on the trim cover at the seam portion of the sewing thread can be suppressed.

  Moreover, since the cover factor of back yarn is set to 380 or less, it can suppress that the manufacturing cost by arrange | positioning a back yarn increases.

  Furthermore, since the seam interval of the sewing thread is set to 3 mm or more, the trim cover is formed at the seam portion of the sewing thread while suppressing an increase in the tact time when sewing the first skin member and the second skin member together. Formation of wrinkles can be suppressed.

  According to the vehicle seat of the second aspect, in addition to the effect of the vehicle seat of the first aspect, the cover factor of the second yarn is set to 1310 or more. You can Therefore, when a force is input in a direction in which the first skin member and the second skin member move away from each other, the second yarn moved by the force is brought into contact with the adjacent second yarn, and the second yarn moves. Can be regulated by the adjacent second yarn. As a result, it is possible to suppress the movement of the second yarn into the gaps between the respective back yarns, and to suppress the formation of wrinkles on the trim cover at the seam portion of the sewing yarn.

  According to the vehicle seat of the third aspect, in addition to the effect of the vehicle seat of the second aspect, the yarn density of the second yarn is set to a value not more than 6 times the yarn density of the back yarn. Since the fineness of the second yarn is small (the thickness is small), the second yarn can be prevented from easily entering the gaps between the respective back yarns. As a result, it is possible to suppress the movement of the second yarn into the gaps between the respective back yarns, and to suppress the formation of wrinkles on the trim cover at the seam portion of the sewing yarn.

  According to the vehicle seat of claim 4, in addition to the effect of the vehicle seat of any one of claims 1 to 3, the second yarn has a half or more of the fineness of the back yarn. Since the value is set, it is possible to easily suppress the second yarn from entering the gaps between the respective back yarns. Therefore, when a force is input in the direction in which the first skin member and the second skin member move away from each other, movement of the second yarn into the gap between the respective back yarns can be suppressed. As a result, formation of wrinkles on the trim cover at the seam portion of the sewing thread can be suppressed.

  According to the vehicle seat of the fifth aspect, in addition to the effect exhibited by the vehicle seat of any of the first to fourth aspects, the first yarn is a yarn having a fineness smaller than that of the second yarn. Are formed by twisting two or more yarns, and the fineness of the first yarn in the twisted state is set to be the same as the fineness of the second yarn or larger than the fineness of the second yarn. It is possible to make the first yarn inconspicuous on the fabric surface with respect to the second yarn while securing the strength, and to easily ensure the designability by the second yarn.

  According to the vehicle seat of the sixth aspect, in addition to the advantageous effects of the vehicle seat of any of the first to fifth aspects, the first outer skin member or the second outer skin member having the back yarn is the back yarn The elastic member having rigidity higher than the rigidity of the first skin member or the second skin member is disposed, and the suture sutures the first skin member and the second skin member via the elastic member. When a force acts in the direction in which the skin member and the second skin member move away from each other, the rigidity of the elastic member can suppress the back yarn and the second yarn from filling the gaps between the back yarns and gathering them together. As a result, formation of wrinkles on the trim cover at the seam portion of the sewing thread can be suppressed.

  Also, in the case of a woven fabric in which the second yarn is expressed more on the surface of the woven fabric than the first yarn (yarn woven fabric), the woven fabric is softer than a woven fabric in which yarns in two directions cross each other in a lattice. Accordingly, it is difficult to secure the rigidity of the vehicle seat, and the rigidity of the vehicle seat can be enhanced by the elastic member, and the cushioning performance of the vehicle seat can be enhanced.

(A) is a perspective front view of a vehicle seat in an embodiment of the present invention, and (b) is a front view of a seat back. (A) is a partial enlarged front view of the trim cover which expanded the IIa part of FIG.1 (b) partially, (b) is a cross-sectional schematic diagram of the trim cover in the IIb-IIb line of FIG. 2 (a) FIG. (A) is a front view of a warp, (b) is a front view of a weft, and (c) is a front view of a back yarn. (A) is a cross-sectional schematic diagram of the trim cover in the IVa-IVa line of FIG.2 (b), (b) is a cross-sectional schematic diagram of the trim cover in the IVb-IVb line of FIG. 4 (a). FIG. 6 is a table illustrating the presence of wrinkles on the surface of the trim cover with respect to the back yarn cover factor and suture stitch spacing.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the attached drawings. First, a vehicle seat 1 according to an embodiment of the present invention will be described with reference to FIG. FIG. 1A is a perspective front view of a vehicle seat 1 according to an embodiment of the present invention, and FIG. 1B is a front view of a seatback 3.

  In the following description, with respect to the vehicle seat 1 in the state shown in FIG. 1B, the left side of the drawing is the right side, the right side of the drawing is the left side, and the upper side of the drawing is the upper side. The lower side of the drawing is referred to as the rear side, and the rear side of the drawing is referred to as the front side. Furthermore, arrows F-B, U-D, and L-R in the figure indicate the front-rear direction, the vertical direction, and the left-right direction of the vehicle seat 1, respectively.

  As shown in FIG. 1, the vehicle seat 1 is a seat mounted on a vehicle (for example, a car or a railcar). The vehicle seat 1 mainly includes a seat cushion 2 on which a seated person sits, a seat back 3 serving as a backrest of the seated person, and a headrest 4 supporting the head of the seated person.

  The seat back 3 mainly includes a seat pad (not shown) integrally formed of a synthetic resin foam of flexible urethane foam, and a trim cover 30 provided on the surface of the seat pad.

  The trim cover 30 is disposed on the front side of the seat back 3 and divided into four in the left-right direction (arrow L-R direction), the first skin member 31, the second skin member 32, the third skin member 33, A fourth skin member 34 and a fifth skin member 35 disposed on the side surface of the seat back 3 are mainly provided.

  The third skin member 33, the first skin member 31, the second skin member 32, the first skin member 31 to the fourth skin member 34 sequentially from the left side (arrow L direction side) to the right side (arrow R direction side) The fourth skin members 34 are arranged in order, and adjacent skins are connected.

  Note that, in the present embodiment, the first skin member 31 and the second skin member 32 are respectively made of a satin weave (satin weave) fabric, and the third skin member 33, the fourth skin member 34, and the fourth skin member 34 are used. The five skin members 35 are each made of a knitted fabric.

  Next, with reference to FIG. 2, the first skin member 31 and the second skin member 32 of the trim cover 30 will be described. 2 (a) is a partially enlarged front view of the trim cover 30 in which a portion IIa of FIG. 1 (b) is partially enlarged, and FIG. 2 (b) is taken along line IIb-IIb of FIG. 2 (a). 5 is a schematic cross-sectional view of a trim cover 30. FIG.

  In FIG. 2A, a part of the warp yarn 41 is illustrated by a broken line. Further, in FIG. 2B, the surface shape of the trim cover 30 by the weft 42 in the vertical direction (the direction of the arrow U-D) is marked with an imaginary line S1 along the surface of the trim cover 30, and The clearances formed between the respective back yarns 43 are illustrated by a two-dot chain line, with the symbol of the clearance K being illustrated. Furthermore, although the detailed description will be described later, the trim cover 30 separates the warp yarn 41 and the weft yarn 42 from the back yarn 43 and forms irregularities on the surface along the horizontal direction (arrow L-R direction). In 2 (b), a state in which the warp yarn 41 and the weft yarn 42 are disposed without a gap from the back yarn 43 is illustrated.

  As shown in FIG. 2, the first skin member 31 and the second skin member 32 are provided with a warp 41 extending in the vertical direction (arrow U-D direction) and a direction perpendicular to the warp 41 (arrow L-R Direction), and wefts 42 appearing on the surface more than warps 41, back yarns 43 extending in the extension direction of the wefts 42, and the back surfaces of the warps 41, wefts 42 and back yarns 43 And an elastic member 44 disposed on the The warp yarn 41, the weft yarn 42, and the back yarn 43 are yarns formed of polyester fibers.

  The warp yarn 41 and the weft yarn 42 are woven fabrics (12-sheet twill weave fabric) in which the warp yarn 41 and the weft yarns 12 form a complete structure, and one warp yarn 41 is on the surface side with respect to the twelve weft yarns 42. It is configured to cross over once. Accordingly, since a large number of weft yarns 42 appear on the fabric surface, a smooth and glossy fabric surface can be formed.

  Further, since the crossing points of the warp yarn 41 and the weft yarn 42 are respectively formed at positions not adjacent to each other, it is possible to make it difficult to recognize the crossing of the warp yarn 41 and the weft yarn 42. Thereby, the designability of the woven fabric surface by the weft 42 can be improved.

  In the present embodiment, a twelve-sheet satin woven fabric in which the warp yarn 41 and the weft yarns 12 form a complete organization with twelve yarns will be described. It may be. For example, even in the case of a five-piece satin woven fabric in which five warp yarns 41 and five weft yarns form a complete weave, an eight-sheet satin weave fabric in which eight warp yarns 41 and four weft threads 42 each form a complete weave It is also good.

  The back yarn 43 is a yarn that forms unevenness on the surface of the fabric, is set to a yarn having a fineness higher than the fineness (thickness) of the weft yarn 42 and the warp yarn 41, and extends in the extending direction of the weft yarn 42 It is disposed on the back side of the warp 41. Further, the back yarn 43 is configured as a woven fabric integral with the warp yarn 41 and the weft yarn 42 by partially intersecting the warp yarn 41.

  Although the detailed description will be described later, the distance of the back yarn 43 between each crossing point of the back yarn 43 and the warp 41 is the distance of the weft yarn 42 between each crossing point of the back yarn 43 and the warp 41. Set short. Thus, the weft yarn 42 can be pushed out to the surface side of the trim cover 30, and the arrangement of the weft yarn 42 can be shifted in the front-rear direction (arrow F-B direction) to form irregularities on the fabric surface (see FIG. 4A). ).

The elastic member 44 is a member that enhances the rigidity of the trim cover, is formed of a synthetic resin foam of soft urethane foam, and is adhered to the back side of the woven fabric in which the warp yarn 41, the weft yarn 42, and the back yarn 43 are integrated. Will be arranged. The elastic member 44 in the present embodiment is set to a density of 0.020 to 0.035 g / cm ³ , and is higher than the satin woven fabric formed of the warp yarn 41, the weft yarn 42, and the back yarn 43 described above. Rigidity is set high.

  Next, the warp yarn 41, the weft yarn 42, and the back yarn 43 will be described in detail with reference to FIG. 3 (a) is a front view of the warp 41, FIG. 3 (b) is a front view of the weft 42, and FIG. 3 (c) is a front view of the back yarn 43. As shown in FIG.

  The warp yarn 41 is configured by twisting two first twisted yarns 41 a and second twisted yarns 41 b. Both of the first twisted yarn 41a and the second twisted yarn 41b are set to a fineness of 84T (dtex (dtex)), and the fineness of a warp 41 obtained by combining the first twisted yarn 41a and the second twisted yarn 41b is set to 168T. . In other words, the first twisted yarn 41a and the second twisted yarn 41b are set to have substantially the same thickness A (see FIG. 3A), and the warp 41 composed of the first twisted yarn 41a and the second twisted yarn 41b. The thickness B (see FIG. 3A) is set to twice the thickness A of the first twisted yarn 41a or the second twisted yarn 41b (B = A × 2). By twisting together the two first twisted yarns 41 a and the second twisted yarns 41 b, the strength and elasticity of the warp yarns 41 can be improved, and breakage of the warp yarns 41 can be suppressed. In addition, in this embodiment, although the 1st twist yarn 41a and the 2nd twist yarn 41b are formed in left twist (Z twist), it is not limited to this, and is formed in the opposite right twist (S twist). It may be

Further, the yarn density of the warp yarn 41 is set to 130 yarns / inch, and the cover factor (CF) of the warp yarn 41 is set to 1685. In addition, the value of the cover factor shown by this embodiment does not specify the characteristic of textiles (the 1st outer skin member 31 and the 2nd outer skin member 32), but each thread (warp 41, weft 42, and back thread 43) And the value obtained by (tint (T)) ^1/2 × (yarn density (book / inch)).

  The weft yarn 42 is formed of yarn having a fineness of 167 T (thickness C), and is set to a value close to the fineness (168 T (thickness B)) of the warp yarn 41 (C ≒ B). The yarn density of the weft yarn 42 is set to 105 yarns / inch, and the cover factor (CF) of the weft yarn 42 is set to 1356.

  As described above, since the first skin member 31 and the second skin member 32 are satin woven fabrics configured so that the weft yarns 42 appear more on the surface of the trim cover 30, the fineness of the weft yarns 42 is set to 167 T By setting the cover factor of the weft 42 to 1310 (102 yarn density / 1 inch) or more, the arrangement interval of each weft 42 can be made precise, and the design of the surface of the trim cover 30 is secured it can.

  Further, by forming the warp yarn 41 with the first twisted yarn 41 a and the second twisted yarn 41 b thinner than the weft yarn 42, the warp yarn 41 appearing on the surface of the trim cover 30 can be made difficult to recognize. As a result, the design of the trim cover 30 can be improved.

  Furthermore, since the warp yarn 41 is configured by twisting the first twisted yarn 41a and the second twisted yarn 41b, the first twisted yarn 41a and the second twisted yarn 41b in the extending direction of the weft yarn 42 (arrow L-R direction) It can be turned. Therefore, since the extending direction of the first twisted yarn 41a and the second twisted yarn 41b can be made parallel to the extending direction of the weft yarn 42, it is difficult to recognize the warp yarn 41 appearing on the surface of the trim cover 30. it can. As a result, the design of the trim cover 30 can be improved (see FIG. 1A).

  The back yarn 43 is configured by twisting two third twisted yarns 43 a and fourth twisted yarns 43 b. The fineness of the third twisted yarn 43a and the fourth twisted yarn 43b is both set to 167T, and the fineness of the back yarn 43 obtained by combining the third twisted yarn 43a and the fourth twisted yarn 43b is set to 334T. In other words, the third twisted yarn 43a and the fourth twisted yarn 43b are set to have substantially the same thickness D (see FIG. 3C), and are back yarns 43 constituted by the third twisted yarn 43a and the fourth twisted yarn 43b. The thickness E (see FIG. 3C) is set to twice the thickness D of the third twisted yarn 43a or the fourth twisted yarn 43b (E = D × 2). The yarn density of the back yarn 43 is set to 21 / inch, and the cover factor (CF) of the back yarn 43 is set to 384.

  Next, with reference to FIG. 4, the surface shape of the trim cover 30 and the trim cover 30 in a state in which the first skin member 31 and the second skin member 32 are sewn together will be described. 4 (a) is a schematic cross-sectional view of the trim cover 30 taken along line IVa-IVa of FIG. 2 (b), and FIG. 4 (b) is a cross-sectional view of the trim cover 30 taken along line IVb-IVb of FIG. 4 (a). It is a cross-sectional schematic diagram.

  4A, a part of the sewing thread 50 is illustrated by a broken line, and the surface shape of the trim cover 30 by the weft 42 in the horizontal direction (arrow L-R direction) is an imaginary line along the surface of the trim cover 30. The code of S2 is attached and illustrated by a two-dot chain line. Further, in FIG. 4B, the surface shape of the trim cover 30 by the weft 42 in the vertical direction (arrow U-D direction) in the same manner as FIG. 2B is the symbol of an imaginary line S1 along the surface of the trim cover 30. And is illustrated by a two-dot chain line, and the gap between the respective back yarns 43 is denoted by a symbol of a gap K and is illustrated by a two-dot chain line.

  First, the surface shape of the trim cover 30 will be described with reference to FIG. 4 (a). As shown in FIG. 4A, the back yarn 43 has a length (distance) T1 (FIG. 4A) between each crossing point P3 (see FIG. 4A) with each warp yarn 41 (see FIG. 4A). ) Is set shorter than the length (distance) T2 (see FIG. 4A) of the weft yarn 42 between the crossing points P3 of the back yarn 43 and the warp yarn 41 (T2> T1). Thereby, the warp yarn 41 and the weft yarn 42 are separated from the back yarn 43 (a gap is formed between the warp yarn 41 and the weft yarn 42 and the back yarn 43), and the weft yarn 42 is curved while being pushed to the surface side of the trim cover 30. It can be done. Further, crossing points P3 of the back yarns 43 and the warp yarns 41 are formed at the same position in the vertical direction. Therefore, the surface of the trim cover 30 is formed in a wave shape in which the unevenness is continuous in the horizontal direction (the arrow L-R direction) (see an imaginary line S2).

  The length T1 of the back yarn 43 between the crossing points P3 and the length T2 of the weft yarn 42 between the crossing points P3 can be changed as appropriate. For example, T1 is set to 6 mm and T2 is set to 8 mm between the first crossover points P3 and each second crossover point P3 adjacent to the first crossover point P3 is adjacent to each other. , T1 may be set to 3 mm and T2 may be set to 4 mm. According to this, the distance by which the weft yarn 42 is pushed out to the surface side of the trim cover 30 by the back yarn 43 can be set to a different distance between the crossing points P3. As a result, the uneven shape (wave shape) of the trim cover 30 due to the weft thread 42 being pushed out to the surface side of the trim cover 30 can be complicated, and the design of the trim cover 30 can be improved.

  In the present embodiment, the case where one warp 41 crosses the back yarn 43 at each crossing point P3 has been described, but two or more warp yarns 41 are attached to the back yarn 43 at each crossing point P3. You may cross each other.

  Next, with reference to FIGS. 4A and 4B, a state in which the first skin member 31 and the second skin member 32 are sewn together will be described. As shown in FIGS. 4 (a) and 4 (b), the first skin member 31 is bent toward the back surface side of the trim cover 30 at the edge on the connection (suture) side with the second skin member 32. It has a turnaround portion 31a. The second skin member 32 includes a folded portion 32 a that is bent toward the back surface side of the trim cover 30 at an edge on the connection (suture) side with the first skin member 31.

  In the state where the surfaces of the first skin member 31 and the second skin member 32 are in contact with each other, the folded portion 31 a and the folded portion 32 a are sewn together by the sewing thread 50. Connected (stitched) with The folded portion 31a and the folded portion 32a are formed by setting the two threads 50 of the thread 50 passed from the first skin member 31 side and the thread 50 passed from the second skin member 32 side at a predetermined interval They are sewn together by crossing them at a pitch of 3.5 ± 0.5 mm.

  The sewing thread 50 is a thread formed from polyester fibers, and is set to a (thick) thread having a larger fineness than each thread (warp thread 41, weft thread 42, back thread 43) forming the fabric. Thereby, the strength of the sewing thread 50 can be secured, and cutting of the sewing thread 50 can be suppressed. In each of the drawings (FIG. 2 (b), FIG. 4 (a) and FIG. 4 (b)), the sewing thread 50 is shown to be thinner than the back thread 43 in order to facilitate understanding.

  The sewing thread 50 is formed by combining three twisted yarns of two twisted yarns together and twisting together (from a total of six twisted yarns). The fineness of one thread of the twisted yarn is set to 167T, and the fineness of the suture 50 in a state in which the twisted yarns are twisted is set to 1002T.

  As the thread 50, threads having different thicknesses are used in accordance with the members to be sewn and the parts to be sewn. For example, an air bag (not shown) is disposed inside the seat back 3 (see FIG. 1), and the portion of the air bag which is to be broken by the swelling force has three twisted yarns and one twisted yarn. The fineness of the part is set to 233T, and a sewing thread 50 of 650T in which the fineness of the sewing thread in a state in which the twisted yarns are twisted is smaller than 1002T is used.

  In addition, the number of twisted yarns is set to 6 and the denier of one twisted yarn is set to 278T in the stitch portion expressing the design by the sewing thread 50, and the denier in a state where those twisted yarns are twisted together is 1700T larger than 1002T. Sewing thread 50 is used. That is, the sewing thread 50 is suitably changed and used in the range of the value of fineness 650-1700T.

  As described above, in the first skin member 31 and the second skin member 32, the warp 41 has the fineness 168T, the yarn density 130/1 inch, and the cover factor 1685, respectively, and the weft 42 has the fineness 167T, The thread density is set to 105 threads / 1 inch, the cover factor 1356, the back thread 43 is set to the value of the fineness 334T, the thread density 21 threads / 1 inch, the cover factor 383, and the sewing thread 50 is It is set to a value of 1002 T and sewed at a pitch of 3.5 mm.

  Here, the intervals of the respective back yarns 43 are wide (only the yarns of the back yarn 43 are arranged only by simply arranging the back yarns 43 between the warp yarns 41 and the weft yarns 42 of the satin woven fabric The density is small, the cover factor of the back yarn 43 is small, and the gap K (see FIG. 4B) between the back yarns 43 may be large. In addition, when the distance between the stitches P2 (the portion where the sewing thread 50 is passed through the trim cover 30 (see FIG. 4B)) is large, the gaps between the back yarns 43 disposed between the stitches P2 are K may be large. Therefore, the first skin member 31 is pulled in the direction of arrow F1 (see FIG. 4A), and the second skin member 32 is pulled in the direction of arrow F2 (see FIG. 4A). When the force is applied in the direction in which the second skin member 32 and the second skin member 32 move away from each other, the warp yarn 41, the weft yarn 42, and the back yarn 43 have a pitch of 1 Since the weft thread 42 near the seam P2 (see FIG. 4B) is gathered near the central portion P1 (see FIG. 4B) of the sewing thread 50 between the matching seam P2), the vicinity of the seam P2 is reduced. There is a possibility that wrinkles may be formed on the surface side of the trim cover 30 of the above.

  On the other hand, in the present embodiment, in the first skin member 31 and the second skin member 32, the back yarn 43 is set to the values of the fineness 334T, the yarn density 21/1 inch, and the cover factor 383 Since 50 is set to the value of fineness 1002 T and sewn together at a pitch of 3.5 mm, the clearance K (see FIG. 4B) of each back yarn 43 disposed between one pitch of the sewing thread 50 is small. it can.

  Therefore, the first skin member 31 is pulled in the direction of arrow F1 (see FIG. 4A), and the second skin member 32 is pulled in the direction of arrow F2 (see FIG. 4A). When a force acts in the direction in which the second skin member 32 and the second skin member 32 move away from each other, toward the central portion P1 (see FIG. 4B) of the suture 50 of one pitch so as to fill the gaps K of the respective back yarns 43. The moving amounts of the moving warp yarn 41, the weft yarn 42, and the back yarn 43 can be reduced. Thereby, it can suppress that the warp yarn 41, the weft yarn 42, and the back yarn 43 gather to the center part P1 of the sewing thread 50 of 1 pitch. As a result, formation of wrinkles on the surface of the trim cover 30 can be suppressed.

  Further, in the first skin member 31 and the second skin member 32, the elastic member 44 is disposed on the back surface, and the first skin member 31 and the second skin member 32 are sewn together by the sewing thread 50 via the elastic member 44. Therefore, when force is input in the direction in which the first skin member 31 and the second skin member 32 move away from each other, the warp yarn 41, the weft yarn 42, and the back yarn 43 are the gaps K of the respective back yarns 43 (FIG. 4). The rigidity of the elastic member 44 can prevent the central portion P1 (see FIG. 4B) of the thread 50 of one pitch from being gathered so as to fill in (b). As a result, formation of wrinkles on the surface of the trim cover 30 can be suppressed.

  Furthermore, in the satin-woven fabric, the fabric is softer than the plain-woven fabric, so it is difficult to secure the rigidity of the vehicle seat 1, and the elastic member 44 increases the rigidity of the vehicle seat 1 Thus, the cushioning performance of the vehicle seat 1 can be enhanced.

  Next, with reference to FIG. 5, the test results of the cover factor of the back yarn 43 and the seam interval of the sewing yarn 50 with respect to the wrinkles on the surface of the trim cover 30 will be described. FIG. 5 is a table illustrating the presence of wrinkles on the surface of the trim cover 30 with respect to the cover factor of the back yarn 43 and the seam interval of the suture 50.

  In the table shown in FIG. 5, “Seam interval (mm)” in the left column is the value of the seam interval (one pitch of the sewing thread 50) of the sewing thread 50, and “back thread cover factor” in the upper column is It is the value of the cover factor (CF) of the back yarn 43. In the table, “○” is described when no wrinkle is recognized on the surface of the trim cover 30.

  In this test, the warp yarn 41 is set to the values of fineness 168 T, yarn density 130/1 inch, and cover factor 1685, respectively. The weft yarn 42 is set to a fineness of 167 T, a yarn density of 105/1 inch, and a cover factor 1356, respectively.

  In addition, the second test in which the fineness and yarn density of the weft yarn 42 are usually applied (fineness 84 to 168 T, yarn density 102 to 108 yarns / 1 inch) and the range to which the fineness of the sewing yarn 50 is normally applied (650 to Although the 3rd test changed by 1700 T) was performed, since the test result similar to the table | surface of FIG. 5 was obtained, it shall not be newly illustrated.

  As shown in FIG. 5, when “covering factor of back yarn” is set to 310, setting “seam spacing” to 3.0 mm or less causes wrinkles to be formed on the surface of trim cover 30. Can be prevented. On the other hand, in the case where the "covering factor of the back yarn" is 320 or more (the range of F in FIG. 5), the "stitch interval" is set to 4.0 mm or less (the range of J in FIG. 5). The formation of wrinkles on the surface of the trim cover 30 can be prevented. This is because the gaps K (see FIG. 4B) between the respective back yarns 43 become smaller.

  That is, as the “back yarn cover factor” becomes larger, the gap K (see FIG. 4B) between adjacent back yarns 43 decreases, so it is relatively between the sutures 50 of one pitch. The gap K between the back yarns 43 is reduced. Thereby, when force acts in the direction in which the first skin member 31 and the second skin member 32 move away from each other, the warp yarn 41, the weft yarn 42, and the back yarn 43 fill the gaps K of the respective back yarns 43. The amount of movement of the one-pitch sewing thread 50 toward the central portion P1 (see FIG. 4B) can be reduced. Thereby, it can suppress that the warp yarn 41, the weft yarn 42, and the back yarn 43 gather to the center part P1 of the sewing thread 50 of 1 pitch. As a result, it is possible to suppress the formation of wrinkles on the surface of the trim cover 30 without reducing the distance between the seams P2 (see FIG. 4B).

  In the case where the “back yarn cover factor” is set to 310 or less, since the gap K of each back yarn is larger than when the “back yarn cover factor” is set to 310, “stitch” Since it is clear that it is necessary to set the interval to 3.0 mm or less, the illustration thereof is omitted.

  Further, by setting the “back yarn cover factor” of the back yarn 43 to 380 or less (the range of G in FIG. 5), the back yarn 43 is woven into the warp yarn 41 and the weft yarn 42 and the weft yarn 42 is on the front side. When extruding, the provision of the back yarn 43 can suppress an increase in the manufacturing cost. That is, it can suppress that the arrangement cost of the back thread 43 increases too much. When the weft thread 42 is pushed out to the surface side of the trim cover 30 by the back thread 43, the back thread 43 is pulled in the direction toward each intersection point P3 of the back thread 43 and each warp thread 41. The strength of the back yarn 43 can be secured by forming the yarn size of the back yarn 43 to be larger (the thickness is larger) than the yarn size of the weft yarn 42. As a result, it is not necessary to increase the number of back yarns 43 disposed, and an increase in manufacturing cost can be suppressed.

  Further, the “stitch interval” of the sewing thread 50 is set to 3.0 mm or more (the range of H in FIG. 5). Thereby, it can suppress that the tact time of the process of sewing the sewing thread 50 increases too much.

  Therefore, the cover factor of the back yarn 43 is set to 320 to 380 (between F and G in FIG. 5), and the fineness of the sewing yarn 50 is normally applied (650 to 1700 T (third test)). The seam interval (pitch) is set to 3.0 to 4.0 mm (between H and J in FIG. 5), thereby suppressing formation of wrinkles on the surface of the trim cover 30, and the suture thread 50. It is possible to achieve both suppression of an increase in the tact time of the sewing process. Further, the design of the trim cover 30 can be secured by increasing the unevenness of the surface of the trim cover 30.

  As mentioned above, although the present invention was explained based on the above-mentioned embodiment, the present invention is not limited to the above-mentioned form at all, It is easy to be able to carry out various modification improvement in the range which does not deviate from the meaning of the present invention. It can be guessed.

  The numerical values raised in the above embodiment are an example, and it is naturally possible to adopt other numerical values. For example, the cover factor value of the weft yarn 42 can be varied between 1310 (yarn density 102 yarns / inch) to 1400 (yarn density 108 yarns / inch).

  By setting the cover factor of the weft yarns to 1310 (yarn density is 102 yarns / inch) or more, the arrangement intervals of the weft yarns 42 can be made precise, so the first skin member 31 and the second skin member 32 are separated When a force is input in a direction, the weft 42 moving in the direction to fill the gap K (see FIG. 4B) between the respective back yarns 43 with that force is brought into contact with the adjacent weft 42, The movement of the weft 42 moving in the direction to fill the gap K can be regulated by the next weft 42. As a result, it is possible to suppress the movement of the weft yarn 42 into the gap K of each back yarn 43, and to suppress the formation of wrinkles on the trim cover 30 at the seam P2 (see FIG. 4B) of the sewing thread 50. .

  On the other hand, by setting the cover factor of the weft yarn 42 to 1400 (yarn density 108 yarns / inch) or less, it is possible to suppress that the weft yarn 42 is densely arranged and the fabric surface becomes hard. As a result, the weft yarn 42 can be easily pushed out to the surface side of the trim cover 30 by the back yarn 43, and the design of the woven fabric surface can be secured.

  The yarn density of the weft yarn 42 can be changed in the range of 5 to 6 times the yarn density of the back yarn 43. By setting the yarn density of the weft yarn 42 to five or more times the yarn density of the back yarn 43, the rigidity of the weft yarn 42 can be lowered and the weft yarn 42 can be easily bent. Therefore, when the weft yarn 42 is pushed out to the surface side of the trim cover 30 by the back yarn 43 and bent, the weft yarn 42 can be prevented from being bent. As a result, the design of the surface of the trim cover 30 by the extrusion of the weft 42 can be secured.

  On the other hand, by setting the yarn density of the weft yarn 42 to 6 times or less of the yarn density of the back yarn 43, the fineness of the weft yarn 42 is small (the thickness is thin) and the gap K between each back yarn 43 ( It is possible to prevent the weft yarn 42 from entering easily in FIG. 4 (b). As a result, formation of wrinkles on the trim cover 30 can be suppressed.

  Furthermore, the fineness of the weft yarn 42 can be changed in the range of 1/2 to 1 time with respect to the fineness of the back yarn 43. By setting the fineness of the weft yarn 42 to at least 1/2 times the fineness of the back yarn 43, the fineness of the weft yarn 42 with respect to the gaps K (see FIG. 4B) between the respective back yarns 43 is increased. The penetration of the weft yarn 42 into the gap K can be easily suppressed. Therefore, it is possible to suppress the movement of the weft yarn 42 into the gap K of the respective back yarns 43 when a force acts in a direction in which the first skin member 31 and the second skin member 32 move away from each other. As a result, formation of wrinkles on the trim cover 30 at the seam P2 (see FIG. 4B) portion of the thread 50 can be suppressed.

  On the other hand, by setting the fineness of the weft yarn 42 to be less than or equal to one times the fineness of the back yarn 43 (the weft yarn 42 is thinner than the back yarn 43), the weft yarn 42 is pushed out to the surface side of the trim cover 30 by the back yarn 43. In this case, it is possible to suppress an increase in the force of pulling the back yarn 43 in the direction toward the intersection point P3 between the back yarn 43 and each warp 41. As a result, breakage of the back yarn 43 can be suppressed.

  Although the said embodiment demonstrated the case where the 1st outer skin member 31-the 4th outer skin member 34 were divided | segmented into the left-right direction (arrow L- R direction), it is not necessarily restricted to this. For example, the first skin member 31 to the fourth skin member 34 may be divided in the vertical direction (arrow U-D direction), and only the first skin member 31 and the second skin member 32 may be divided vertically. It may be divided into directions.

  Although the case where two sheets to be sewn are both formed from the satin-woven fabric has been described in the above embodiment, the present invention is not necessarily limited thereto, and one of the two sheets to be sewn is a satin-woven fabric If it is For example, when connecting the first skin member 31 (woven fabric of satin weave) and the third skin member 33 (knitted fabric), each yarn (warp yarn 41, weft yarn 42, back yarn 43, sewing thread 50) of the first skin member 31. Can be suppressed from forming a wrinkle in the 1st outer skin member 31 by comprising as above.

1 Vehicle seat 30 trim cover 31 first skin member (first skin member, second skin member)
32 Second skin member (first skin member, second skin member)
33 Third skin member (first skin member, second skin member)
34 Fourth skin member (first skin member, second skin member)
41 warp yarn (first yarn)
42 Weft (second yarn)
43 back thread 44 elastic member 50 thread P2 seam

Claims (6)

A trim cover having a first skin member constituting a skin of a sheet, a second skin member connected to the first skin member, and a suture thread connecting the first skin member and the second skin member by stitching. In a vehicle seat provided with
At least one of the first skin member or the second skin member is a first thread extending in one direction;
A second yarn extending in a direction perpendicular to the first yarn and appearing more on the surface than the first yarn;
At least a portion of the first skin member or the second skin member having the first yarn and the second yarn is disposed on the back side with respect to the first yarn and the second yarn, and the second yarn And a back thread extending in the extending direction,
The back yarn has a cover factor set to 320 to 380.
The seat for a vehicle, wherein the sewing thread is set to have a fineness of 650 T to 1700 T, and a seam interval of 3 mm to 4 mm.   The vehicle seat according to claim 1, wherein a cover factor of the second yarn is set to 1310 or more.   The vehicle seat according to claim 2, wherein a yarn density of the second yarn is set to a value 6 times or less of a yarn density of the back yarn.   The vehicular seat according to any one of claims 1 to 3, wherein the second yarn is set to a value of 1/2 or more with respect to the fineness of the back yarn.   The first yarn is formed by twisting two or more yarns having a fineness of a value smaller than the fineness of the second yarn, and the fineness of the first yarn in the state of being twisted together is the same as that of the second yarn. The vehicle seat according to any one of 1 to 4, which is set to be the same as the fineness or larger than the fineness of the second yarn.   The first skin member or the second skin member having the back yarn is provided with an elastic member having a rigidity higher than the rigidity of the first skin member or the second skin member having the back yarn, The vehicle seat according to any one of claims 1 to 5, wherein the thread sews the first skin member and the second skin member via the elastic member.

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