JP6630608B2 - Trim cover and vehicle seat - Google Patents

Description

  The present invention relates to a trim cover and a vehicle seat.

  A vehicle seat typically includes a cushion pad and a trim cover that covers the cushion pad, and the trim cover is manufactured by sewing a plurality of skin materials. In a trim cover formed by sewing a plurality of skin materials, the seam allowance of each of the two sewn skin materials may fall in different directions for each part.

  If the falling direction of the seam allowance of each of the two sewn skin materials is not constant, the seam line of the two skin materials may meander, and the appearance quality of the sheet covered by the trim cover may be reduced. is there. When the sewing line of the two skin materials is curved, the falling direction of the seam allowance is not particularly constant, and the sewing line is likely to meander.

  In order to make the falling direction of the seam allowance of each of the two sewn skin materials constant, the seam allowance of the two skin materials may be sewn to one of the skin materials by out-stitching.

  Further, in the trim cover described in Patent Literature 1, the edge of one of the two skin materials is folded back, and the seam allowance of the skin material is doubled. The integral rigidity of the seam allowance is increased.

  Further, in the trim cover described in Patent Literature 2, a restraining cloth is sewn on a seam allowance of two skin materials to be sewn together, and the restraining cloth is formed of another of the two skin materials. It is hung around the side. The seam allowance of the two skin materials is pulled by the restraining cloth and is tilted in a certain direction.

JP 2000-287780 A JP 2012-90677 A

  If the seam allowance of two skin materials is sewn to one skin material by out-stitching, an additional step of defeating the seam allowance and applying out-stitching is required. For this reason, there is a concern that the manufacturing cost of the trim cover will increase.

  In the trim cover described in Patent Literature 1, the seam allowance of one of the skin materials is doubled, so that the thickness of the sewn portion increases, the sewn portion bulges, and the appearance quality of the sheet covered by the trim cover is reduced. There is a risk of lowering.

  The trim cover described in Patent Literature 2 requires a constraining cloth, increases the number of components, and requires an additional step of sewing the constraining cloth to a seam allowance. For this reason, there is a concern that the manufacturing cost of the trim cover will increase.

  The present invention has been made in view of the above-described circumstances, and in a trim cover formed by sewing a plurality of skin materials, the seam allowance of the two stitched skin materials is kept constant, and the two skin materials are fixed. The purpose of the present invention is to suppress the meandering of the suturing line and to improve the appearance quality of the vehicle seat covered by the trim cover.

A trim cover according to one embodiment of the present invention is a trim cover formed by sewing a plurality of skin materials, wherein two skin materials are sewn by a plurality of rows of seams extending in parallel along a curved sewing line. includes a curved suture portion which is combined, from the farthest seam from the edge of the skin material to the edge of the skin material as a seam allowance, the width of two sheets of skin materials each seam allowance in the curved suture portion is different from each other, said plurality The other seams in the row of seams, other than the seam furthest from the edges of the two skins, sew only the seam allowance of the two skins .

  A vehicle seat according to one embodiment of the present invention includes the trim cover and a cushion pad covered by the trim cover.

  According to the present invention, in a trim cover formed by sewing a plurality of skin materials, the falling direction of the seam allowance of the two sewn skin materials is easily fixed, and the meandering of the stitching line of the two skin materials is suppressed. The appearance quality of the vehicle seat covered by the trim cover can be improved.

It is a perspective view of an example of a vehicular seat for explaining an embodiment of the present invention. FIG. 2 is a cross-sectional view of a portion surrounded by a two-dot chain line circle II in FIG. 1, and is a cross-sectional view of an example of a curved stitch portion of a trim cover. FIG. 3 is an enlarged cross-sectional view of the curved suturing portion of FIG. 2. FIG. 4 is a cross-sectional view of a portion surrounded by a two-dot chain line circle IV in FIG. 1, and is a cross-sectional view of an example of a straight stitch portion of a trim cover. FIG. 3 is a schematic view showing a seam pitch of a seam of a curved seam portion in FIG. 2. It is a schematic diagram which shows the stitch pitch of the seam of the linear stitch part of FIG.

  FIG. 1 shows an example of a vehicle seat for describing an embodiment of the present invention.

  The vehicle seat 1 shown in FIG. 1 includes a seat cushion 2 forming a seat surface portion, a seatback 3 forming a backrest portion, and a headrest 4 supporting a head of an occupant seated on the seat. The seat cushion 2, the seat back 3, and the headrest 4 each have a cushion pad made of a foam material such as urethane foam, and a frame that supports the cushion pad.

  The cushion pad of the seat cushion 2 and the cushion pad of the seat back 3 are integrally covered by a trim cover 5, and the cushion pad of the headrest 4 is also covered by a trim cover different from the trim cover 5.

  The cushion pad of the seat cushion 2 and the cushion pad of the seat back 3 may be respectively covered by individual trim covers, and the headrest 4 is a fixed type headrest and is integrally formed with the seat back 3. In such a case, the cushion pad of the headrest 4 is integrally covered with the cushion pad of the seat back 3 by one trim cover, or integrally with the cushion pad of the seat cushion 2 and the cushion pad of the seat back 3. May be.

  The trim cover 5 is formed by sewing a plurality of skin materials. As the skin material, for example, leather (natural leather, synthetic leather) or cloth (woven fabric, knitted fabric, nonwoven fabric) is used. The skin material may have a single-layer structure of leather or cloth, or a multilayer in which wadding (for example, a resin foam such as a flexible polyurethane foam that can be elastically deformed) is laminated on the leather or cloth with the leather or cloth as a surface material. It may be a structure. The trim cover 5 may be formed of one type of skin material, or may be formed of a plurality of different types of skin materials depending on a part.

  Of the plurality of skin materials forming the trim cover 5, two skin materials 10 and 11 are skin materials that cover one side support portion of the seat back 3, and the skin materials 10 and 11 are mutually separated. Sewn together. At the upper end portion of the side support portion of the seat back 3 (the portion surrounded by the two-dot chain line circle II in FIG. 1), the skin material 10 and the skin material 11 are curved lines extending from the front side to the back side of the seat back 3. Stitched along.

  Hereinafter, with reference to FIG. 2 and FIG. 3, a description will be given of a curved suturing portion in which the skin material 10 and the skin material 11 are sewn along curved seam lines.

  In the curved suturing portion 12 in which the skin material 10 and the skin material 11 are sewn along a curved sewing line, the skin material 10 and the skin material 11 have two rows of seams 13 extending in parallel along the suturing line. Stitched together by seams 14. As described above, when the skin material 10 and the skin material 11 are sewn together by a plurality of rows of seams, the seam allowance of the skin material is from the seam (the seam 13 in this example) disposed farthest from the edge of the skin material. The portion up to the edge of the skin material is referred to.

  The widths of the seam allowances of the skin material 10 and the skin material 11 in the curved seam portion 12 are different from each other. In this example, the width of the seam allowance 10a of the skin material 10 is wider than the width of the seam allowance 11a of the skin material 11. I have.

  The seam allowance 10a and the seam allowance 11a are bent along the curved seam line of the curved seam portion 12. At this time, the seam allowance 10a and the seam allowance 11a are respectively distorted due to bending, and also have a restoring action that spreads in a planar shape against the distortion.

  The distortion generated in the wide seam allowance 10a is larger than the distortion generated in the narrow seam allowance 11a, and the restoration effect generated in the seam allowance 10a having large distortion is stronger than the restoration effect generated in the seam allowance 11a having small distortion. Therefore, the seam allowance 10a and the seam allowance 11a fall to the skin material 11 side so that the seam allowance 10a covers the narrow seam allowance 11a.

  The seam allowance 10a and the seam allowance 11a are pressed against the cushion pad 6 of the seat back 3 in a state where the trim cover 5 is put on the seat cushion 2 and the seat back 3. As described above, the seam allowance 10a and the seam allowance 11a have fallen toward the skin material 11 before being pressed against the cushion pad 6, and are maintained in a state where they have fallen toward the skin material 11 even when pressed against the cushion pad 6. Dripping.

  In this way, by making the widths of the seam allowance 10a and the seam allowance 11a different, an additional step of defeating the seam allowance 10a and the seam allowance 11a and performing out-stitching becomes unnecessary, and a restraining cloth for pulling the seam allowance 10a and the seam allowance 11a is provided. The additional direction of sewing the restraint cloth to the seam allowance 10a and the seam allowance 11a is unnecessary, and the falling direction of the seam allowance 10a and the seam allowance 11a can be easily fixed. Furthermore, the width of the seam allowance 10a and the seam allowance 11a are made different to keep the falling direction of the seam allowance 10a and the seam allowance 11a constant, thereby increasing the thickness and thickness of the seam when one seam material has a double seam allowance. Bulging of the suturing part due to the increase in the length of the suturing portion can also be avoided. Thereby, the meandering of the suturing line of the curved suturing portion 12 can be suppressed, and the appearance quality of the vehicle seat 1 covered by the trim cover 5 can be improved.

  The difference D between the width of the seam allowance 10a and the width of the seam allowance 11a is preferably not less than 3.0 mm. When the difference D is 3.0 mm or more, the restoring action generated in the seam allowance 10a can be sufficiently strengthened against the restoring action caused in the seam allowance 11a, and the seam allowance 10a and the seam allowance 11a can be more stably lowered toward the skin material 11 side. Can be. However, if the difference D is too large, that is, if the width of the seam allowance 10a is too large, for example, the number of the skin materials 10 that can be removed from the raw material may be reduced. The falling direction of the seam allowance 10a and the seam allowance 11a may be disturbed, and the difference D is preferably equal to or less than 10.0 mm.

  Further, in this example, the skin material 10 and the skin material 11 are sewn together by two rows of seams 13 and seams 14 extending in parallel along a curved sewing line, and the skin material 10 and the skin material 11 are As described above, it is preferable that the stitches be sewn by the plurality of rows of seams extending in parallel along the curved stitching line.

  By sewing the skin material 10 and the skin material 11 with a plurality of rows of seams, the integral rigidity of the seam allowance 10a and the seam allowance 11a can be increased. Accordingly, even when a portion where the restoring action is locally weakened exists in the seam allowance 10a, the seam allowance 10a and the seam allowance 11a can be entirely tilted toward the skin material 11 side, and the falling direction of the seam allowance 10a and the seam allowance 11a can be further improved. It is possible to make sure it is constant.

  From the viewpoint of increasing the integral rigidity of the seam allowance 10a and the seam allowance 11a, the seam of the seam 13 and the seam 14 may be fine.

  The sewn portion 22 shown in FIG. 4 is obtained by sewing a skin material 20 covering the center support portion of the seat cushion 2 and a skin material 21 covering one side support portion of the seat cushion 2. 20 and the skin material 21 are linear stitches sewn along a straight line having a smaller curvature than the curved stitch line of the curved stitch portion 12 shown in FIGS. 2 and 3.

  5 and 6, the seam pitch L1 of the seam 13 and the seam 14 of the curved seam portion 12 is equal to or less than the seam pitch L2 of the seam 23 of the linear seam portion 22. By setting the seam pitch L1 of the seam 13 and the seam 14 of the curved seam portion 12 to be equal to or less than the seam pitch L2 of the seam 23 of the linear curved portion 22, the seam allowance 10a and the seam allowance 11a of the curved seam portion 12 are integrated. As described above, the falling direction of the seam allowance 10a and the seam allowance 11a can be more reliably made constant.

  In general, in a trim cover formed by sewing a plurality of skin materials, the seam pitch of a seam stitching the two skin materials is 4.0 mm or more. Is preferably less than 4.0 mm. However, if the seam pitch L1 of the seam 13 and the seam 14 is excessively small, the breaking strength of the skin material 10 and the skin material 11 may be reduced, and the seam pitch L1 of the seam 13 and the seam 14 is 2.0 mm or more. It is suitable.

  As described above, the present invention has been described by taking as an example the curved stitching portion 12 in which the skin material 10 and the skin material 11 covering the upper end of the side support on one side of the seat back 3 are stitched along the curved stitching line. The invention is also applicable to other curved stitches where two skin materials are stitched along a curved stitching line.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat cushion 3 Seat back 4 Headrest 5 Trim cover 6 Cushion pad 10 Skin material 10a Seam allowance 11 Skin material 11a Seam allowance 12 Curved seam part 13 Seam 14 Seam 20 Skin material 21 Skin material 22 Straight seam part 23 Seam

Claims (5)

A trim cover formed by sewing a plurality of skin materials,
Two skin materials are provided with curved stitches sewn together by a plurality of rows of seams extending in parallel along a curved stitching line,
With the seam farthest from the edge of the skin material to the edge of the skin material as a seam allowance, the width of the seam allowance of each of the two skin materials in the curved seam is different from each other, and two skins of the plurality of rows of seams Other than the seam farthest from the edge of the lumber, the trim cover covers only the seam allowance of the two skins . The trim cover according to claim 1, wherein
A trim cover in which a difference in a width of a seam allowance between two skin materials in the curved seam portion is 3.0 mm or more and 10.0 mm or less. The trim cover according to claim 1 or 2 ,
The two skin materials further include a straight stitching portion stitched along a straight stitching line having a smaller curvature than the stitching line of the curved stitching portion,
A trim cover wherein a seam pitch of the seam of the curved seam is equal to or less than a seam pitch of the seam of the straight seam. The trim cover according to any one of claims 1 to 3 , wherein
A trim cover, wherein a seam pitch of the seam of the curved seam portion is 2.0 mm or more and less than 4.0 mm. A trim cover according to any one of claims 1 to 4 ,
A cushion pad covered by the trim cover;
A vehicle seat provided with.

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