JP6856486B2 - Vehicle seat - Google Patents

Description

The present invention relates to a vehicle seat, and more particularly to a vehicle seat capable of suppressing the formation of wrinkles on the trim cover while ensuring the design of the trim cover.

Conventionally, a satin woven fabric is used in which the first yarn extending in one direction is configured so that 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 trimmed cover (Patent Document 1).

JP-A-2010-246645 (paragraphs 0014, 0015, etc.)

However, in general, since the surface of a satin woven fabric is formed smoothly, it is difficult to form irregularities on the surface of the woven fabric, and it is difficult to deform the shape of the surface of the woven fabric to improve the design of the trim cover. There is a point. It should be noted that the surface of the woven fabric can be formed with irregularities by performing a process of forming irregularities on the surface of the woven fabric (for example, embossing) in a separate process after the woven fabric is manufactured, but in this case, a processing step different from that of the woven fabric production. Is not ideal because it requires the above and increases the manufacturing cost.

On the other hand, as a result of diligent studies to solve the above-mentioned problems, the applicant of the present application has made a back yarn having a finer fineness (thicker yarn thickness) than the second yarn on the back surface side of the woven fabric than the second yarn. Was arranged along the second yarn, and the second yarn was pushed out to the surface side of the woven fabric by the back yarn, thereby forming irregularities on the surface of the woven fabric and improving the design of the trim cover (at the time of filing the application of the present application). Not known in).

However, in a satin weave woven fabric having a back thread, when the satin weave woven fabric and another skin member are sewn together to form an integral trim cover, the satin weave woven fabric and the other skin member are combined. When sewing along a direction orthogonal to the extending direction of the back thread, some back threads are passed between two stitches (the part through which the thread to be sewn is passed) (between the sewing threads for one pitch). .. Therefore, a gap between the back threads is arranged between the seams. Therefore, when a force acts in the direction in which the stitching surfaces of the satin weave fabric and the other skin members are separated from each other, the first thread, the second thread, and the back thread are sewn threads so as to fill the gap between the back threads. A new problem has been found in which wrinkles are formed on the trim cover near the seam by reducing the number of second threads near the seam by gathering them together at the central portion of the sewing thread for one pitch along the seam.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a vehicle seat capable of suppressing the formation of wrinkles on the trim cover while ensuring the design of the trim cover. It is supposed to be.

In order to achieve this object, the vehicle seat of the present invention includes a first skin member constituting the skin of the seat, a second skin member connected to the first skin member, the first skin member and the second skin member thereof. It is provided with a trim cover having a sewing thread for sewing and connecting the epidermis members, and at least one of the first epidermis member and the second epidermis member is a first thread extending in one direction and a first thread thereof. The first thread and the second thread of the first skin member or the second skin member having the second thread extending in the direction orthogonal to the thread and appearing on the surface more than the first thread, and the first thread and the second thread. The back thread is provided with a back thread extending in the extending direction of the second thread, at least a part of which is arranged on the back surface side of the back thread, the cover factor of the back thread is set to 320 to 380, and the fineness of the sewing thread is set. Is set from 650T to 1700T, and the stitch spacing is set between 3 mm and 4 mm.

According to the vehicle seat according to claim 1, at least one of the first skin member and the second skin member is a first thread extending in one direction and extending in a direction orthogonal to the first thread. , The second thread that appears more on the surface than the first thread, and at least a part on the back surface side of the first thread and the second thread of the first skin member or the second skin member having the first thread and the second thread. It comprises a back thread that is disposed and extends in the extension direction of the second thread, the back thread has a cover factor set to 320 to 380, the sewing thread has a fineness set to 650T to 1700T, and the stitches. Since the interval between the threads is set between 3 mm and 4 mm, the gap between the back threads arranged between the stitches of the sewing threads can be reduced. As a result, when a force acts in the direction in which the first skin member and the second skin member are separated from each other, the first thread, the second thread, and the back thread move so as to fill the gap between the back threads. Therefore, it is possible to prevent the first thread, the second thread, and the back thread from being gathered near the center between the stitches (the portion through which the thread to be sewn is passed). As a result, it is possible to suppress the formation of wrinkles on the trim cover at the seam portion of the sewing thread.

Further, since the cover factor of the back thread is set to 380 or less, it is possible to suppress an increase in the manufacturing cost due to the arrangement of the back thread.

Further, since the seam spacing 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 the tact time when the first skin member and the second skin member are sewn together from increasing too much. It is possible to suppress the formation of wrinkles on the seams.

According to the vehicle seat according to claim 2, in addition to the effect of the vehicle seat according to claim 1, the cover factor of the second thread is set to 1310 or more, so that the arrangement interval of each second thread is dense. Can be done. Therefore, when a force is input in the direction in which the first skin member and the second skin member are separated from each other, the second thread that moves by the force is brought into contact with the adjacent second thread, and the second thread moves. It can be regulated by the adjacent second thread. As a result, it is possible to suppress the movement of the second thread into the gap between the back threads and prevent the formation of wrinkles on the trim cover at the seam portion of the sewing thread.

According to the vehicle seat according to claim 3, in addition to the effect of the vehicle seat according to claim 2, the yarn density of the second yarn is set to a value of 6 times or less with respect to the yarn density of the back yarn. Therefore, the fineness of the second yarn becomes small (thickness becomes thin), and it is possible to prevent the second yarn from easily entering the gap between the back yarns. As a result, it is possible to suppress the movement of the second thread into the gap between the back threads and prevent the formation of wrinkles on the trim cover at the seam portion of the sewing thread.

According to the vehicle seat according to claim 4, in addition to the effect of the vehicle seat according to any one of claims 1 to 3, the second yarn has a fineness of 1/2 or more with respect to the fineness of the back yarn. Since it is set to a value, it is possible to easily suppress the second thread from entering the gap between the back threads. Therefore, when a force is applied in the direction in which the first skin member and the second skin member are separated from each other, it is possible to prevent the second thread from moving to the gap between the back threads. As a result, it is possible to suppress the formation of wrinkles on the trim cover at the seam portion of the sewing thread.

According to the vehicle seat according to claim 5, in addition to the effect of the vehicle seat according to any one of claims 1 to 4, the first yarn has a fineness smaller than that of the second yarn. Is 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. While ensuring the strength, it is possible to make the first yarn less noticeable on the surface of the woven fabric with respect to the second yarn, and it is possible to easily secure the designability of the second yarn.

According to the vehicle seat according to claim 6, in addition to the effect of the vehicle seat according to any one of claims 1 to 5, the back thread is applied to the first skin member or the second skin member having the back thread. An elastic member having a rigidity higher than that of the first epidermis member or the second epidermis member is arranged, and the sewing thread sews the first epidermis member and the second epidermis member via the elastic member. When a force is applied in the direction in which the skin member and the second skin member are separated from each other, the back thread and the second thread can be prevented from being gathered together by filling the gap between the back threads due to the rigidity of the elastic member. As a result, it is possible to suppress the formation of wrinkles on the trim cover at the seam portion of the sewing thread.

Further, in a woven fabric in which a large number of second yarns are represented on the surface of the woven fabric with respect to the first yarn (saven woven fabric), the woven fabric is more flexible than a woven fabric in which threads in two directions are interlaced in a grid pattern (plain woven fabric). Therefore, it becomes difficult to secure the rigidity of the vehicle seat by that amount, and the rigidity of the vehicle seat can be increased by the elastic member to improve the cushioning performance of the vehicle seat.

(A) is a perspective front view of the vehicle seat according to the embodiment of the present invention, and (b) is a front view of the seat back. (A) is a partially enlarged front view of the trim cover in which the IIa portion of FIG. 1 (b) is partially enlarged, and (b) is a schematic cross-sectional view of the trim cover in line IIb-IIb of FIG. 2 (a). It is a figure. (A) is a front view of the warp yarn, (b) is a front view of the weft yarn, and (c) is a front view of the back yarn. (A) is a schematic cross-sectional view of the trim cover taken along the line IVa-IVa of FIG. 2 (b), and FIG. 4 (b) is a schematic cross-sectional view of the trim cover taken along the line IVb-IVb of FIG. 4 (a). It is a table which shows the presence or absence of a wrinkle on the surface of a trim cover with respect to the cover factor of a back thread and the interval of a seam of a sewing thread.

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

In the following description, with respect to the vehicle seat 1 in the state shown in FIG. 1B, the left side of the paper surface is the right side, the right side of the paper surface is the left side, the upper side of the paper surface is the upper side, and the lower side of the paper surface. Will be described as the lower side, the back side of the paper as the rear (back) side, and the front side of the paper as the front (front) side. Further, the arrows FB, UD, and LR in the drawing indicate the front-rear direction, the up-down 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, an automobile or a railroad vehicle). The vehicle seat 1 mainly includes a seat cushion 2 on which the seated person is seated, a seat back 3 as a backrest of the seated person, and a headrest 4 for 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 soft urethane foam, and a trim cover 30 covered on the surface of the seat pad.

The trim cover 30 is arranged on the front side of the seat back 3, and is divided into four parts in the left-right direction (arrow LR direction): the first skin member 31, the second skin member 32, the third skin member 33, It mainly includes a fourth skin member 34 and a fifth skin member 35 arranged on the side surface of the seat back 3.

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

In the present embodiment, the first skin member 31 and the second skin member 32 are each composed of a satin weave (savelet weave) woven fabric, and the third skin member 33, the fourth skin member 34, and the first skin member 32. Each of the 5 skin members 35 is composed of a knitted fabric.

Next, the first skin member 31 and the second skin member 32 of the trim cover 30 will be described with reference to FIG. FIG. 2A is a partially enlarged front view of the trim cover 30 in which the IIa portion of FIG. 1B is partially enlarged, and FIG. 2B is the line IIb-IIb of FIG. 2A. It is sectional drawing of the trim cover 30.

In FIG. 2A, a part of the warp thread 41 is shown by a broken line. Further, in FIG. 2B, the surface shape of the trim cover 30 by the weft 42 in the vertical direction (arrow UD direction) is a two-dot chain line with the reference numeral S1 along the surface of the trim cover 30. Illustrated, the gaps formed between the back threads 43 are represented by the alternate long and short dash lines with the reference numerals K. Further, as will be described in detail later, in the trim cover 30, the warp yarn 41 and the weft yarn 42 are separated from the back yarn 43, and irregularities are formed on the surface thereof along the horizontal direction (arrow LR direction). In 2 (b), a state in which the warp yarn 41 and the weft yarn 42 are arranged 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 have a warp 41 extending in the vertical direction (arrow UD direction) and a direction orthogonal to the warp 41 (arrow LR). The weft 42 extending in the direction) and appearing more on the surface than the warp 41, the back thread 43 extending in the extending direction of the weft 42, the warp 41, the weft 42, and the back surface of the back thread 43. The elastic member 44, which is arranged in the above, is mainly provided. The warp yarn 41, the weft yarn 42, and the back yarn 43 are yarns formed from polyester fibers.

The warp 41 and the weft 42 are woven fabrics (12 satin weaves) in which each of the warp 41 and the weft 42 has a complete structure, and one warp 41 is on the surface side with respect to the 12 wefts 42. It is configured to intersect once. Therefore, since many weft threads 42 appear on the woven fabric surface, a smooth and glossy woven fabric surface can be formed.

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

In the present embodiment, a 12-sheet satin woven fabric in which 12 warp threads 41 and 12 weft threads each form a complete structure will be described, but the satin weave fabric in which the warp threads 41 and the weft threads 42 have a complete structure in other numbers. There may be. For example, even if it is a five-sheet satin woven fabric in which five warp threads 41 and five weft threads are used to form a complete structure, an eight-sheet satin woven fabric in which eight warp threads 41 and eight weft threads are used to form a complete structure. May be good.

The back yarn 43 is a yarn that forms irregularities on the surface of the woven 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 is mainly extended in the extending direction of the weft yarn 42. It is arranged on the back side of the warp 41. Further, the back yarn 43 is formed as a woven fabric integrally with the warp yarn 41 and the weft yarn 42 by partially intersecting with the warp yarn 41.

Although detailed description will be described later, the distance of the back thread 43 between each intersection point of the back thread 43 and the warp thread 41 is relative to the distance of the weft thread 42 between each intersection point of the back thread 43 and the warp thread 41. Is set short. As a result, the weft 42 can be extruded toward the surface side of the trim cover 30, and the arrangement of the weft 42 can be shifted in the front-rear direction (arrow FB direction) to form irregularities on the woven 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 a woven fabric in which the warp yarn 41, the weft yarn 42, and the back yarn 43 are woven and integrated. Is 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 more than a satin weave woven fabric composed 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. 3A is a front view of the warp thread 41, FIG. 3B is a front view of the weft thread 42, and FIG. 3C is a front view of the back thread 43.

The warp 41 is formed by twisting two first twisted yarns 41a and a second twisted yarn 41b. The fineness of both the first twisted yarn 41a and the second twisted yarn 41b is set to 84T (decitex), and the fineness of the warp yarn 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 yarn 41 composed of the first twisted yarn 41a and the second twisted yarn 41b. The thickness B (see FIG. 3A) is set to be twice the thickness A of the first twisted yarn 41a or the second twisted yarn 41b (B = A × 2). By twisting the two first twisted yarns 41a and the second twisted yarn 41b together, the strength and elasticity of the warp yarns 41 can be improved and the warp yarns 41 can be prevented from being damaged. In the present embodiment, the first twisted yarn 41a and the second twisted yarn 41b are formed in a left twist (Z twist), but are not limited to this, and are formed in the opposite right twist (S twist). You may be.

The yarn density of the warp 41 is set to 130 threads / inch, and the cover factor (CF) of the warp 41 is set to 1685. The value of the cover factor shown in the present embodiment does not specify the characteristics of the woven fabric (first skin member 31 and second skin member 32), and does not specify the characteristics of each yarn (warp yarn 41, weft yarn 42, and back yarn 43). ) Is specified, and is a ^{value obtained by (fineness (T)) 1/2} × (thread density (book / inch)).

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

As described above, since the first skin member 31 and the second skin member 32 are satin weave fabrics in which the weft threads 42 appear in large numbers on the surface of the trim cover 30, the fineness of the weft threads 42 is set to 167T. By setting the cover factor of the weft 42 to 1310 (thread density 102 threads / 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 ensured. it can.

Further, by forming the warp 41 with the first twist 41a and the second twist 41b, which are thinner than the weft 42, it is possible to make it difficult to recognize the warp 41 appearing on the surface of the trim cover 30. As a result, the design of the trim cover 30 can be improved.

Further, since the warp yarn 41 is formed by twisting the first twisted yarn 41a and the second twisted yarn 41b, the first twisted yarn 41a and the second twisted yarn 41b are oriented in the extending direction of the weft yarn 42 (arrow LR direction). Can be swiveled. Therefore, since the extending direction of the first twisted yarn 41a and the second twisted yarn 41b can be brought close to 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 formed by twisting two third twist yarns 43a and a fourth twist yarn 43b. The fineness of both the third twisted yarn 43a and the fourth twisted yarn 43b is 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 the back yarn 43 composed of 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 threads / 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 where 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 on the IVa-IVa line of FIG. 2 (b), and FIG. 4 (b) is a schematic cross-sectional view of the trim cover 30 on the IVb-IVb line of FIG. 4 (a). It is a cross-sectional schematic diagram.

In FIG. 4A, a part of the sewing thread 50 is shown by a broken line, and the surface shape of the trim cover 30 by the weft 42 in the horizontal direction (arrow LR direction) is a virtual line along the surface of the trim cover 30. It is illustrated by a two-dot chain line with the reference numeral S2. Further, in FIG. 4B, as in FIG. 2B, the surface shape of the trim cover 30 by the weft 42 in the vertical direction (arrow UD direction) is the code of the virtual line S1 along the surface of the trim cover 30. Is attached and illustrated by a two-dot chain line, and a gap K is attached to the gap between each back thread 43 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. 4A. As shown in FIG. 4 (a), the back thread 43 has a length (distance) T1 of the back thread 43 between each intersection point P3 (see FIG. 4 (a)) with each warp 41 (FIG. 4 (a)). ) Is set shorter than the length (distance) T2 (see FIG. 4A) of the weft thread 42 between the intersection points P3 of the back thread 43 and the warp thread 41 (T2> T1). As a result, the warp 41 and the weft 42 are separated from the back thread 43 (a gap is formed between the warp 41 and the weft 42 and the back thread 43), and the weft 42 is curved while being pushed out to the surface side of the trim cover 30. Can be made to. Further, the intersection P3 of each back thread 43 and each warp thread 41 is formed at the same position in the vertical direction. Therefore, the surface shape of the trim cover 30 is formed into a wave shape in which irregularities are continuous in the horizontal direction (arrow LR direction) (see virtual line S2).

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

Further, in the present embodiment, the case where one warp 41 intersects the back thread 43 at the position of each intersection point P3 has been described, but two or more warp threads 41 are attached to the back thread 43 at each intersection point P3. It may be interlaced.

Next, a state in which the first skin member 31 and the second skin member 32 are sewn together will be described with reference to FIGS. 4 (a) and 4 (b). 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 connecting (suture) side with the second skin member 32. The folded-back portion 31a is provided. The second skin member 32 includes a folded-back portion 32a bent toward the back surface side of the trim cover 30 at the edge portion on the connecting (suture) side with the first skin member 31.

In the first skin member 31 and the second skin member 32, the folded-back portion 31a and the folded-back portion 32a are sewn together by the suture 50 in a state where the surfaces of the first skin member 31 and the second skin member 32 are butted against each other. It is connected (sewn) with. The folded-back portion 31a and the folded-back portion 32a have two sewing threads 50, that is, a sewing thread 50 passed from the first skin member 31 side and a sewing thread 50 passed from the second skin member 32 side, at a predetermined interval ( It is sewn by interlacing 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 thread having a higher fineness (thickness) than each thread (warp thread 41, weft thread 42, back thread 43) forming the woven fabric. As a result, it is possible to secure the strength of the sewing thread 50 and prevent the sewing thread 50 from being cut. In each drawing (FIGS. 2 (b), 4 (a), and 4 (b)), the sewing thread 50 is shown thinner than the back thread 43 for easy understanding.

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

As the sewing thread 50, threads having different thicknesses are used according to the member to be sewn and the portion to be sewn. For example, an airbag (not shown) is arranged inside the seat bag 3 (see FIG. 1), and the number of twisted yarns is three and one twisted yarn is formed in a portion where the airbag is desired to be broken by the swelling force of the airbag. The fineness of the portion is set to 233T, respectively, and the sewing thread 50 of 650T in which the fineness of the sewing thread in the state where the twisted threads are twisted is smaller than 1002T is used.

Further, in the stitch portion expressing the design by the sewing thread 50, the number of twisted yarns is set to 6 and the fineness of one twisted yarn is set to 278T, respectively, and the fineness of the twisted yarns in a twisted state is 1700T, which is larger than 1002T. Sewing thread 50 is used. That is, the sewing thread 50 is appropriately changed and used within the range of the value of fineness 650 to 1700T.

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

Here, by simply arranging the back yarn 43 between the warp 41 and the weft 42 of the satin weave fabric (weaving with the warp 41 or the weft 42), the distance between the back yarns 43 is wide (the yarn of the back yarn 43). The density is low, the cover factor of the back yarn 43 is small), and the gap K between the back yarns 43 (see FIG. 4B) may be large. Further, if the distance between the stitches P2 (the portion through which the sewing thread 50 is passed through the trim cover 30 (see FIG. 4B)) is large, the gap between the back threads 43 arranged between the stitches P2 is large. There is a possibility that K will increase. 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), respectively, and the first skin member 31 is pulled. When a force acts in the direction in which the second skin member 32 and the second skin member 32 are separated from each other, the warp thread 41, the weft thread 42, and the back thread 43 are one pitch (adjacent) along the sewing thread 50 so as to fill the gap K of each back thread 43. The weft threads 42 near the seam P2 (see FIG. 4B) are gathered at the central portion P1 (see FIG. 4B) of the sewing thread 50 (between the matching seams P2), so that the weft threads 42 near the seam P2 are reduced. There was a risk that wrinkles would be formed on the surface side of the trim cover 30.

On the other hand, in the present embodiment, in the first skin member 31 and the second skin member 32, the back thread 43 is set to the values of fineness 334 T, thread density 21 threads / 1 inch, and cover factor 383, respectively, and sewing thread. Since 50 is set to a value of fineness 1002T and sewn at a pitch of 3.5 mm, the gap K (see FIG. 4B) of each back thread 43 arranged between one pitch of the sewing thread 50 is reduced. 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), respectively, and the first skin member 31 is pulled. When a force acts in the direction in which the second skin member 32 and the second skin member 32 are separated from each other, toward the central portion P1 (see FIG. 4B) of the 1-pitch sewing thread 50 so as to fill the gap K of each back thread 43. The amount of movement of the warp yarn 41, the weft yarn 42, and the back yarn 43 that move can be reduced. As a result, it is possible to prevent the warp thread 41, the weft thread 42, and the back thread 43 from gathering at the central portion P1 of the sewing thread 50 at one pitch. As a result, it is possible to prevent the formation of wrinkles on the surface of the trim cover 30.

Further, in the first skin member 31 and the second skin member 32, an elastic member 44 is arranged 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 a force is input in the direction in which the first skin member 31 and the second skin member 32 are separated from each other, the warp 41, the weft 42, and the back thread 43 have a gap K between the back threads 43 (FIG. 4). The rigidity of the elastic member 44 can prevent the sewing thread 50 from gathering at the center P1 (see FIG. 4B) of the 1-pitch sewing thread 50 so as to fill (see (b)). As a result, it is possible to prevent the formation of wrinkles on the surface of the trim cover 30.

Further, in the satin weave woven fabric, the woven fabric is more flexible than the normal plain weave woven fabric, so that it is difficult to secure the rigidity of the vehicle seat 1 by that amount. Therefore, the cushioning performance of the vehicle seat 1 can be improved.

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

In the table shown in FIG. 5, the "seam spacing (mm)" in the left column is the value of the stitch spacing (1 pitch of the sewing thread 50) of the sewing thread 50, and the "back thread cover factor" in the upper column is It is a value of the cover factor (CF) of the back thread 43. In the table, “◯” is described when wrinkles are not recognized on the surface of the trim cover 30.

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

The second test in which the fineness and yarn density of the weft 42 are normally applied (fineness 84 to 168T, thread density 102 to 108 threads / inch) and the range in which the fineness of the sewing thread 50 is normally applied (650 to 650 to 1 inch). The third test, which was changed in 1700T), was performed, but the same test results as those shown in the table of FIG. 5 were obtained, so they are not shown.

As shown in FIG. 5, when the "back thread cover factor" is set to 310, wrinkles are formed on the surface of the trim cover 30 by setting the "seam spacing" to 3.0 mm or less. Can be prevented. On the other hand, when the "back thread cover factor" is 320 or more (range F in FIG. 5), the "seam spacing" is set to 4.0 mm or less (range J in FIG. 5). , It is possible to prevent the formation of wrinkles on the surface of the trim cover 30. This is because the gap K between the back threads 43 (see FIG. 4B) becomes small.

That is, as the value of the "back thread cover factor" increases, the gap K between adjacent back threads 43 (see FIG. 4B) becomes smaller, so that the "back thread cover factor" is relatively between the sewing threads 50 of one pitch. The gap K between the back threads 43 is reduced. As a result, when a force acts in the direction in which the first skin member 31 and the second skin member 32 are separated from each other, the warp 41, the weft 42, and the back thread 43 fill the gap K of each back thread 43. The amount of movement toward the central portion P1 (see FIG. 4B) of the one-pitch sewing thread 50 can be reduced. As a result, it is possible to prevent the warp thread 41, the weft thread 42, and the back thread 43 from gathering at the central portion P1 of the sewing thread 50 at one pitch. As a result, it is possible to suppress the formation of wrinkles on the surface of the trim cover 30 without reducing the spacing between the seams P2 (see FIG. 4B).

When the "back thread cover factor" is set to 310 or less, the gap K between the back threads is larger than when the "back thread cover factor" is set to 310, so that the "seam" is set. Since it is clear that the "spacing" needs to be set to 3.0 mm or less, the illustration is omitted.

Further, by setting the "back yarn cover factor" of the back yarn 43 to 380 or less (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 placed on the surface side. By arranging the back thread 43 when extruded, it is possible to prevent the manufacturing cost from increasing too much. That is, it is possible to suppress an excessive increase in the arrangement cost of the back thread 43. 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 between the back thread 43 and each warp thread 41, so that the back thread 43 Where it is necessary to secure the strength of the back yarn 43, the strength of the back yarn 43 can be ensured by forming the fineness of the back yarn 43 to be larger (thickness) than the fineness of the weft yarn 42. As a result, it is not necessary to increase the number of back threads 43 to be arranged, and it is possible to suppress an increase in manufacturing cost.

Further, the "seam spacing" of the sewing thread 50 is set to 3.0 mm or more (range of H in FIG. 5). As a result, it is possible to prevent the tact time in the process of sewing the sewing thread 50 from increasing too much.

Therefore, the cover factor of the back thread 43 is set to 320 to 380 (between F and G in FIG. 5), and the fineness of the sewing thread 50 is usually applied in the range (650 to 1700T (third test)) of the sewing thread 50. By setting the stitch spacing (pitch) to 3.0 to 4.0 mm (between H and J in FIG. 5), it is possible to suppress the formation of wrinkles on the surface of the trim cover 30 and to suppress the formation of wrinkles and the sewing thread 50. It is possible to suppress the tact time of the sewing process from increasing too much and to achieve both. Further, the unevenness of the surface of the trim cover 30 can be increased to ensure the design of the trim cover 30.

Although the present invention has been described above based on the above-described embodiment, the present invention is not limited to the above-described embodiment, and it is easy to make various modifications and improvements within a range that does not deviate from the gist of the present invention. It can be inferred.

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

By setting the cover factor of the weft 42 to 1310 (thread density is 102 threads / inch) or more, the arrangement interval of each weft 42 can be made precise, so that the first skin member 31 and the second skin member 32 are separated from each other. When a force is input in the direction, the weft 42 that moves in the direction of filling the gap K (see FIG. 4B) between the back threads 43 by the force is brought into contact with the adjacent weft 42. The movement of the weft 42 that moves in the direction of filling the gap K can be regulated by the adjacent weft 42. As a result, it is possible to suppress the movement of the weft thread 42 to the gap K of each back thread 43, and to prevent 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 42 to 1400 (thread density 108 threads / inch) or less, it is possible to prevent the weft 42 from being densely arranged and the woven fabric surface from becoming hard. As a result, the back yarn 43 makes it easier to extrude the weft yarn 42 toward the surface side of the trim cover 30, and the design of the woven fabric surface can be ensured.

Further, 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 42 to be 5 times or more the yarn density of the back yarn 43, the rigidity of the weft 42 can be lowered and the weft 42 can be easily bent. Therefore, when the weft thread 42 is bent while being pushed out to the surface side of the trim cover 30 by the back thread 43, it is possible to prevent the weft thread 42 from bending. As a result, the design of the surface of the trim cover 30 by extruding the weft 42 can be ensured.

On the other hand, by setting the yarn density of the weft 42 to 6 times or less the yarn density of the back yarn 43, the fineness of the weft 42 becomes small (thickness becomes thin), and the gap K between the back yarns 43 ( It is possible to prevent the weft thread 42 from easily entering the (see FIG. 4B). As a result, it is possible to suppress the formation of wrinkles on the trim cover 30.

Further, the fineness of the weft 42 can be changed in the range of 1/2 to 1 times the fineness of the back yarn 43. By setting the fineness of the weft 42 to 1/2 times or more the fineness of the back yarn 43, the fineness of the weft 42 with respect to the gap K (see FIG. 4B) between the back yarns 43 is increased. , It is possible to easily prevent the weft thread 42 from entering the gap K. Therefore, when a force acts in the direction in which the first skin member 31 and the second skin member 32 are separated from each other, it is possible to prevent the weft 42 from moving into the gap K of each back thread 43. As a result, it is possible 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 fineness of the weft 42 to 1 times or less the fineness of the back thread 43 (the weft 42 is thinner than the back thread 43), the weft 42 is pushed out to the surface side of the trim cover 30 by the back thread 43. In this case, it is possible to suppress an increase in the force for pulling the back thread 43 in the direction toward each intersection point P3 between the back thread 43 and each warp thread 41. As a result, it is possible to prevent the back thread 43 from breaking.

In the above embodiment, the case where the first skin member 31 to the fourth skin member 34 is divided in the left-right direction (arrow LR direction) has been described, but the present invention is not necessarily limited to this. For example, the first skin member 31 to the fourth skin member 34 may be divided in the vertical direction (arrow UD direction), and only the first skin member 31 and the second skin member 32 are up and down. It may be divided in the direction.

In the above embodiment, the case where both of the two stitched sheets are formed from a satin weave fabric has been described, but the present invention is not necessarily limited to this, and one of the two stitched sheets is a satin weave fabric. It should be. For example, when connecting the first skin member 31 (weave of satin weave) and the third skin member 33 (knit), each thread (warp 41, weft 42, back thread 43, sewing thread 50) of the first skin member 31 is connected. ) Is configured as described above, it is possible to suppress the formation of wrinkles on the first skin member 31.

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 4th skin member (1st skin member, 2nd skin member)
41 Warp (first thread)
42 Weft (2nd thread)
43 Back thread 44 Elastic member 50 Sewing thread P2 Seam

Claims (6)

A trim cover having a first skin member constituting the skin of the seat, a second skin member connected to the first skin member, and a suture for suturing and connecting the first skin member and the second skin member. In a vehicle seat equipped with
At least one of the first skin member or the second skin member is a first thread extending in one direction and
A second thread extending in a direction orthogonal to the first thread and appearing on the surface more than the first thread,
At least a part of the first thread and the second thread having the first thread and the second thread is disposed on the back surface side of the first thread and the second thread of the second skin member, and the second thread. With a back thread that extends in the extension direction,
The back thread has a cover factor set from 320 to 380.
The sewing thread is a vehicle seat characterized in that the fineness is set from 650T to 1700T and the seam spacing is set between 3 mm and 4 mm. The vehicle seat according to claim 1, wherein the cover factor of the second thread is set to 1310 or more. The vehicle seat according to claim 2, wherein the yarn density of the second yarn is set to a value of 6 times or less with respect to the yarn density of the back yarn. The vehicle 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 smaller than that of the second yarn, and the fineness of the first yarn in the twisted state is that of the second yarn. The vehicle seat according to any one of claims 1 to 4, wherein the fineness is set to be the same as or higher than the fineness of the second yarn. The first skin member or the second skin member having the back thread is provided with an elastic member having a rigidity higher than that of the first skin member or the second skin member having the back thread. The vehicle seat according to any one of claims 1 to 5, wherein the sewing thread is sewn between the first skin member and the second skin member via the elastic member.

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