Sheet cover

Abstract

To provide a seat cover whose three-dimensional appearance is increased by raising a designed surface, more than raising the designed surface through forming a shirring-sewing portion on a seam-allowance portion.SOLUTION: The seat cover is a back cover 3C in which a plurality of upholstery pieces covering a back pad are integrally formed by sewing in a seam line portion 15. A gathered sewing part 12a1 sewn together with a tape T is provided in a seam allowance 12a in the seam line portion. The seam allowance 12a, when the back cover 3C is covered on the back pad, is arranged in a planar shape between the back cover 3C and the back pad, so as to push up a designed surface of a lapped part 12c of a top plate side piece 12 corresponding to the seam allowance 12a and swell out the surface outward.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a seat cover.

Background Art

[0002] Conventionally, a seat cover, which is a skin material for seats in automobiles and the like, is formed in a bag shape by integrating a plurality of skin pieces by sewing their edges together. In this seat cover, there may be a case where it is desired to enhance the design surface of the sewing part and make it look three-dimensional. Patent Document 1 discloses an example of such a seat cover. In the seat cover described in Patent Document 1, in the sewing part corresponding to the corner part of the seat cushion, a structure is adopted in which an inlay sewing part is formed in the seam allowance part to enhance the design surface.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the seat cover disclosed in Patent Document 1, at the sewing part of the first skin piece and the second skin piece, a gathered seam sewn together with a tape is provided at the hem of the first skin piece to raise the design surface. Specifically, with a gathered seam formed in advance at the hem of the first skin piece, the second skin piece is sewn to increase the thickness of the overlapping hems of both, and with the first skin piece placed on top of the hem, the seat pad is covered to partially raise the design surface of the first skin piece. Here, the more significant the perimeter difference at the sewing part of the first and second skin pieces, the more skill is required for the operation. Also, there is a limit to the thickness that can be formed, and there was a problem in that only a certain degree of raising of the design surface could be achieved, and the need for a more three-dimensional appearance could not be met.

[0005] In view of such problems, an object of the present invention is to provide a seat cover with increased three-dimensionality by increasing the amount of raising of the design surface more than that achieved by forming a gathered seam at the hem.

Means for Solving the Problems

[0006] A first invention of the present invention is a seat cover formed by integrating a plurality of skin pieces that cover a seat pad, which is a cushion body, by sewing at the sewing line part. At least at one hem of the sewing line part, a gathered seam sewn together with a tape is provided. When the seat cover is placed on the seat pad, the hem is arranged in a planar manner between the seat cover and the seat pad, and it pushes up the design surface of the skin piece corresponding to the hem and bulges outward.

[0007] According to the first invention, since a gather stitch sewn together with a tape is applied to the seam allowance, it can be sewn and shrunk at a stable interval compared to a gather stitch without using a tape, and the thickness of the seam allowance can also be stably increased. As a result, when the seam allowance is disposed flatly between the seat cover and the seat pad, the design surface of the skin piece corresponding to the seam allowance at at least one seam line portion of the seat can be greatly raised outward to exhibit an appearance shape full of three-dimensionality. Here, the gather stitch refers to a sewing method of sewing and shrinking a cloth to form a wavy fold, and means a stitch with a larger amount of sewing and shrinking than the overcasting stitch.

[0008] According to a second invention of the present invention, in the first invention, a regulating member for regulating a surface in contact with the seat cover to one side surface is disposed on the seam allowance when the seat cover is put on the seat pad.

[0009] According to the second invention, since the surface on which the seam allowance falls and abuts against the back surface of the seat cover is regulated to one side surface, the design surface rising along the seam line portion can be unified to one side of the seam line and does not sag, so that the appearance quality can be further improved.

[0010] According to a third invention of the present invention, in the first invention or the second invention, the fin portion of the flange having a cylindrical portion and a plate-like fin portion extending in the radial direction of the cylindrical portion is co-sewn to the seam allowance, and the co-sewn skin piece is folded back so as to surround the outer peripheral surface of the cylindrical portion of the flange and exhibits a design surface corresponding to a part of the outer surface of a cylinder having a larger diameter and concentric with the cylindrical portion.

[0011] According to the third invention, a design surface having a part of the side surface of the cylinder at the corner along the sewing portion of the seat cover and rising greatly outward can be represented.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

Mode for Carrying Out the Invention

[0013] FIGS. 1 and 2 show a first embodiment of the present invention. This embodiment is an example in which the present invention is applied to the seat back 3 of the vehicle seat 1. In each figure, the directions of the vehicle seat 1 and the vehicle when the vehicle seat 1 is attached to the vehicle are shown by arrows. In the following description, the description regarding directions shall be made based on this direction.

[0014] As shown in FIG. 1, the vehicle seat 1 has a seat cushion 2 that supports the buttocks and thighs of the seated occupant from below, and a seat back 3 that supports the waist and back of the seated occupant from behind. The lower end side of the seat back 3 is attached to the rear end side of the seat cushion 2 via a reclining adjuster (not shown), whereby the inclination angle of the seat back 3 with respect to the seat cushion 2 can be adjusted.

[0015] As shown in FIG. 1, the seat back 3 has a back frame 3F that forms a skeleton, a back pad 3P as a cushioning material disposed on the back frame 3F, and a back cover 3C as a skin material that covers the back pad 3P. The back pad 3P is an elastic body formed of a foamed urethane resin, and its outer shape defines the outer shape of the seat back 3. Here, the back pad 3P and the back cover 3C correspond to the "seat pad" and "seat cover" in the claims, respectively.

[0016] The back cover 3C is formed into a bag shape that is integrated by sewing a plurality of skin pieces 10 together at their edges and opening to the rear. The skin pieces 10 are cut into various shapes from skin materials such as fabric, genuine leather, and synthetic leather. The skin material may be a laminated material in which a thin urethane slab pad is laminated on the back side of fabric, genuine leather, synthetic leather, etc.

[0017] As shown in FIG. 2, the back cover 3C at the side corner portion of the seat back 3 has a top plate main piece 11, a top plate side piece 12, a gusset piece 13, and a cotton cloth 14. The top plate main piece 11, the top plate side piece 12, and the gusset piece 13 are all formed of synthetic leather, and each corresponds to the skin piece 10. The left edge portions of the top plate side piece 12 and the cotton cloth 14 and the upper edge portion of the gusset piece 13 are connected by a sewing line portion 15. Also, the left edge portion of the top plate main piece 11 and the right edge portions of the top plate side piece 12 and the cotton cloth 14 are connected by a sewing line portion 16. Here, the cotton cloth 14 corresponds to the "restricting member" in the claims.

[0018] The sewing line portion 15 is formed such that the seam allowance 13a at the upper edge of the kamachi piece 13 and the seam allowance 14a at the left edge of the cotton cloth 14 are connected by the first sewing line 15a, and the seam allowance 12a at the left edge of the top plate side piece 12 is connected to the seam allowances 13a and 14a by the second sewing line 15b. The first sewing line 15a is arranged closer to the edge side of the seam allowances 12a, 14a, and 13a than the second sewing line 15b. A gather stitch portion 12a1 is provided in the seam allowance 12a of the top plate side piece 12 and made thick before being connected by the second sewing line 15b. Specifically, as shown in FIG. 4, a plurality of keyhole-shaped gap portions 12a2 are formed at equal pitches in the seam allowance 12a, and the gather stitch portion 12a1 is formed by overcasting stitches to fill each gap portion 12a2 with a thin resin tape T laid thereon. At this time, by sewing with the tape T laid on, the wave height of the wavy gather stitch portion 12a1 becomes stably larger compared to the case without overlapping, and the seam allowance 12a can be made thick. Here, the sewing line portion 15 and the seam allowance 12a respectively correspond to the "at least one sewing line portion" and the "seam allowance portion" in the claims.

[0019] As shown in FIG. 2, the sewing line portion 16 is formed such that the seam allowance 12b at the right edge of the top plate side piece 12 and the seam allowance 14b at the right edge of the cotton cloth 14 are connected by the third sewing line 16a, and the seam allowance 11a at the left edge of the top plate main piece 11 and the hanging cotton cloth 17 are connected to the seam allowances 12b and 14b by the fourth sewing line 16b. The hanging cotton cloth 17 is a member for pulling in and fixing the sewing line portion 16 with respect to a groove portion (not shown) of the back pad 3P. The third sewing line 16a is arranged closer to the edge side of the seam allowances 12b, 14b, and 11a than the fourth sewing line 16b.

[0020] The sewing of the sewing line part 15 and the sewing line part 16 is performed in the following procedure. (1) A gather stitch part 12a1 is provided at the sewing allowance 12a of the top plate side piece 12. (2) The sewing allowance 13a of the spatula piece 13 and the sewing allowance 14a of the cotton cloth 14 are connected by the first sewing line 15a. (3) The sewing allowance 12a of the top plate side piece 12 is connected to the sewing allowances 13a and 14a by the second sewing line 15b. (4) The top plate side piece 12 is folded forward along the second sewing line 15b, the cotton cloth 14 is folded backward along the second sewing line 15b, and the sewing allowance 12b of the top plate side piece 12 and the sewing allowance 14b of the cotton cloth 14 are connected by the third sewing line 16a. (5) The sewing allowance 11a of the top plate main piece 11 and the hanging cotton cloth 17 are connected to the sewing allowances 12b and 14b by the fourth sewing line 16b. Here, the steps (1) and (2) may be interchanged or performed simultaneously. Note that the reason for connecting the cotton cloth 14 to the top plate side piece 12 by the second sewing line 15b and the fourth sewing line 16b is to arrange the sewing allowances 12a and 13a so that the sewing allowance 12a abuts and overlaps the rear surface of the top plate side piece 12.

[0021] When the back cover 3C formed in this way is put on the back pad 3P, the overlapping part 14c, which is the part overlapping the sewing allowance 12a, the sewing allowance 13a, the sewing allowance 14a, and the sewing allowance 14a of the cotton cloth 14 folded backward along the second sewing line 15b, is laminated, and the overlapping part 14c abuts on the surface of the back pad 3P, pushing up the surface side of the overlapping part 12c, which is the part overlapping the sewing allowance 12a of the top plate side piece 12 and the corresponding part, forward. At this time, since the gather stitch part 12a1 sewn with the tape T in a stacked state is provided at the sewing allowance 12a of the top plate side piece 12 and is thick, it is possible to exhibit an appearance shape with a large bulge forward and a three-dimensional feel on the surface side of the overlapping part 12c, which is the design surface along the second sewing line 15b. Further, due to the function of the cotton cloth 14, the surface on which the sewing allowances 12a and 13a fall and abut against the back surface of the back cover 3C is regulated by the surface provided with the gather stitch part 12a1 of the sewing allowance 12a, which is one side surface. Therefore, the design surface that bulges along the sewing line part 15 is unified on one side of the second sewing line 15b and does not sag, so the appearance quality can be further improved.

[0022] Figure 3 shows the second and third embodiments. This embodiment is an example in which the present invention is applied to the seat cushion 2 of the vehicle seat 1. The second embodiment is for the left stitching portion 27, and the third embodiment is for the right stitching portion 28. Here, the stitching portion 27 and the stitching portion 28 respectively correspond to the "at least one stitching portion" in the claims.

[0023] The second embodiment will be described. As shown in FIG. 1, the seat cushion 2 includes a cushion frame 2F forming a skeleton, a cushion pad 2P as a cushion material disposed on the cushion frame 2F, and a cushion cover 2C as a skin material covering the cushion pad 2P. The cushion pad 2P is an elastic body formed of a foamed urethane resin, and its outer shape defines the outer shape of the seat cushion 2. Here, the cushion pad 2P and the cushion cover 2C respectively correspond to the "seat pad" and the "seat cover" in the claims.

[0024] The cushion cover 2C is formed in a bag shape that is integrated by sewing a plurality of skin pieces 20 together at their edge portions and opening downward. The skin pieces 20 are cut into various shapes from skin materials such as fabric, genuine leather, and synthetic leather. The skin material may be a laminate in which a thin urethane slab pad is laminated on the back side of fabric, genuine leather, synthetic leather, or the like.

[0025] As shown in FIGS. 1 and 3, the cushion cover 2C at the front side corner portion of the sheet cushion 2 includes a top plate main piece 21, a top plate side piece 22, a gusset piece 23, a cotton cloth 24, a main inner piece 25, and a side inner piece 26. The top plate main piece 21, the top plate side piece 22, the gusset piece 23, the main inner piece 25, and the side inner piece 26 are all formed of synthetic leather, and each corresponds to the skin piece 20. The front edge portion of the gusset piece 23 and the front edge portion of the side inner piece 26 are connected by a sewing line portion 27. The left edge portion of the top plate main piece 21 and the cotton cloth 24 and the front edge portion of the main inner piece 25 are connected by a sewing line portion 28.

[0026] The sewing line portion 27 corresponding to the second embodiment is formed such that the sewing allowance 26a of the front edge portion of the side inner piece 26 and the strip-shaped resin plate 31 are connected by a fifth sewing line 27a, and the sewing allowance 23a of the front edge portion of the gusset piece 23 is connected to the sewing allowance 26a by a sixth sewing line 27b. A gather sewing portion 23a1 is provided on the sewing allowance 23a of the gusset piece 23 and is made thick before being connected by the sixth sewing line 27b. The gather sewing portion 23a1 is formed in the same manner as the gather sewing portion 12a1 in the first embodiment. By sewing in a state where the tape T is overlapped, the wave height of the gather sewing portion 23a1 formed in a wave shape is larger than that in the case where it is not overlapped, and the sewing allowance 23a is made thick. The resin plate 31 is a flexible resin plate made of resin such as polypropylene and can be sewn, and has a substantially rectangular shape with its longitudinal direction extending vertically.

[0027] The sewing of the seam portion 27 is performed in the following procedure. (1) A gather stitch portion 23a1 is provided on the seam allowance 23a of the camache piece 23. (2) A resin plate 31 is connected to the seam allowance 26a of the side inner piece 26 with a fifth seam 27a. (3) The seam allowance 26a is connected to the seam allowance 23a with a sixth seam 27b. Here, the steps (1) and (2) may be performed in the reverse order or simultaneously. Note that the resin plate 31 is connected to the seam allowance 26a in order to arrange the seam allowances 23a and 26a such that the seam allowance 23a abuts and overlaps the rear surface of the camache piece 23. Here, the resin plate 31 corresponds to the "restricting member" in the claims.

[0028] When the cushion cover 2C formed in this way is put on the cushion pad 2P, with the seam allowances 23a, 26a, and the resin plate 31 laminated, the resin plate 31 abuts against the surface of the cushion pad 2P and pushes up the front side of the overlapping portion 23b, which is the portion that overlaps the seam allowance 23a of the camache piece 23 and is the corresponding portion. At this time, since the gather stitch portion 23a1, which is sewn with the tape T in a superimposed state, is provided on the seam allowance 23a of the camache piece 23 and is made thick, it is possible to exhibit an outward appearance shape that bulges greatly forward and is full of three-dimensionality on the front side of the overlapping portion 23b, which is the design surface along the sixth seam 27b. Further, due to the function of the resin plate 31, the surface on which the seam allowances 23a and 26a fall and abut against the back surface of the back cover 3C is restricted to the surface provided with the gather stitch portion 23a1 of the seam allowance 23a, which is one side surface. Therefore, the design surface that bulges along the seam portion 27 is unified on one side of the sixth seam 27b and does not sag, so the appearance quality can be further improved.

[0029] As shown in FIG. 3, the stitching portion 28 corresponding to the third embodiment is in a state where the seam allowance 25a at the front edge of the main inner piece 25 and the seam allowance 24a at the left edge of the cotton cloth 24 are connected by the seventh stitch line 28a, and the seam allowance 21a at the left edge of the top plate main piece 21 is connected to the seam allowances 25a and 24a by the eighth stitch line 28b. Further, the fin portion 32b of the hem 32 is connected to the seam allowances 24a, 25a, and 21a by the ninth stitch line 28c to form. The hem 32 is a resin-made flexible long member having a cylindrical portion 32a and a flat fin portion 32b extending in the radial direction thereof, and the fin portion 32b can be sewn. From the edge side of the seam allowances 24a, 25a, and 21a, the ninth stitch line 28c, the seventh stitch line 28a, and the eighth stitch line 28b are arranged in this order. The hem 32 is connected by the ninth stitch line 28c to the edge portion of the fin portion 32b opposite to the cylindrical portion 32a, and the cylindrical portion 32a is arranged in the vicinity of the eighth stitch line 28b. A gather stitch portion 21a1 is provided on the seam allowance 21a of the top plate main piece 21 and is made thick before being connected by the eighth stitch line 28b. The gather stitch portion 21a1 is formed in the same manner as the gather stitch portion 12a1 in the first embodiment. By sewing in a state where the tape T is overlapped, the wave height of the gather stitch portion 21a1 formed in a wave shape becomes larger than when not overlapped, and the seam allowance 21a is made thick. Here, the cotton cloth 24 corresponds to the "restricting member" in the claims.

[0030] The sewing of the sewing line portion 28 is performed in the following procedure. (1) A gather stitch portion 21a1 is provided at the seam allowance 21a of the top plate main piece 21. (2) The seam allowance 25a of the main inner piece 25 and the seam allowance 24a of the cotton cloth 24 are connected by a seventh sewing line 28a. (3) The seam allowance 21a of the top plate main piece 21 is connected to the seam allowances 25a and 24a by an eighth sewing line 28b. (4) The fin portion 32b of the hem 32 is connected to the seam allowances 24a, 25a, and 21a by a ninth sewing line 28c. (5) The top plate main piece 21 is folded forward along the cylindrical portion 32a of the hem 32, and the cotton cloth 24 is folded backward along the eighth sewing line 28b. Here, the steps (1) and (2) may be interchanged in order or performed simultaneously. Note that the reason for connecting the cotton cloth 24 to the top plate main piece 21 by the seventh sewing line 28a, the eighth sewing line 28b, and the ninth sewing line 28c is to arrange the seam allowances 25a and 21a to overlap the top plate main piece 21 by connecting the right edge portion of the cotton cloth 24 to the top plate main piece 21 by a sewing line portion (not shown). Here, the cotton cloth 24 corresponds to the "restricting member" in the claims.

[0031] When the cushion cover 2C formed in this way is placed over the cushion pad 2P, the overlapping portion 24c, which is the portion that overlaps with the sewing margin 24a of the cotton cloth 24 folded backward at the sewing margins 21a, 25a, 24a, and the eighth sewing line 28b, is laminated, and the overlapping portion 24c abuts against the surface of the back pad 3P, and the surface side of the overlapping portion 21b, which is the portion that overlaps with the sewing margin 21a of the top plate main piece 21, is pushed upward in the forward direction via the bead edge 32. At this time, since the gathering stitch portion 21a1 sewn with the tape T in a stacked state is provided at the sewing margin 21a of the top plate main piece 21 and is made thick, the surface side of the overlapping portion 21b, which is the design surface along the eighth sewing line 28b, can be greatly raised forward via the bead edge 32 to exhibit an appearance shape full of three-dimensional effect. Further, the top plate main piece 21 is folded back so as to surround the outer peripheral surface of the columnar portion 32a of the bead edge 32, and exhibits a design surface corresponding to a part of the outer surface of a column having a larger diameter and concentric with the columnar portion 32a. Thereby, it is possible to represent a design surface that has a part of the side surface of the column at the corner along the eighth sewing line 28b of the cushion cover 2C and is raised.

[0032] As described above, specific embodiments have been described. However, the present invention is not limited to their appearance and configuration, and various changes, additions, and deletions are possible without changing the gist of the present invention. For example, the following are examples.

[0033] 1. In the above embodiment, the sewing line portion 15 is arranged at the corner portion of the back cover 3C, and the sewing line portions 27 and 28 are arranged at the corner portion of the cushion cover 2C. However, the present invention is not limited to this, and at least one sewing line portion can be provided on the seating surface portion. For example, by providing a gathering stitch portion at the sewing margin 12b or the sewing margin 11a in the sewing line portion 16 and arranging the back cover 3C between the back pads 3P with the sewing margins 12b and 11a overlapped, the surface side of the portion of the top plate main piece 11 or the portion of the top plate side piece 12 along the fourth sewing line 16b can be greatly raised forward.

[0034] 2. In the above-described embodiment, the present invention is applied to the seat cover of the vehicle seat 1, but it may also be applied to the seat covers of seats installed in airplanes, ships, trains, etc.

Explanation of Signs

[0035] 1 Vehicle seat 2 Seat cushion 2C Cushion cover 2P Cushion pad 3 Seat back 3C Back cover 3P Back pad 10 Skin piece 12 Top plate side piece 12a Seam allowance 12a1 Gather stitch part 12c Overlap part 13 Gusset piece 13a Seam allowance 14 Cotton cloth (restricting member) 14a Seam allowance 14c Overlap part 15 Sewn line part (at least one sewn line part) 15a First sewn line 15b Second sewn line 16 Sewn line part 16a Third sewn line 16b Fourth sewn line 20 Skin piece 21 Top plate main piece 21a Seam allowance 21a1 Gather stitch part 21b Overlap part 23 Gusset piece 23a Seam allowance 23a1 Gather stitch part 23b Overlap part 24 Cotton cloth (restricting member) 24a Seam allowance 25 Main inner piece 25a Seam allowance 26 Side inner piece 26a Seam allowance 27 Stitching part (at least one stitching part) 27a Fifth stitching line 27b Sixth stitching line 28 Stitching part (at least one stitching part) 28a Seventh stitching line 28b Eighth stitching line 28c Ninth stitching line 31 Resin plate (restricting member) 32 Ball edge 32a Cylindrical part 32b Fin part T Tape

Claims

1. A seat cover formed by integrating a plurality of skin pieces covering a seat pad, which is a cushion body, by sewing at a sewing line portion, In at least one seam allowance of the sewing line portion, a plurality of gap portions penetrating in the thickness direction and opening at the terminal of the skin piece are formed at equal pitches in at least one of the skin pieces to be sewn together, Gathering stitches are applied to fill each of the gap portions in a state where a tape is overlapped on a portion of the gap portion excluding the side of the terminal of the skin piece, The seam allowance is arranged in a planar manner between the seat cover and the seat pad when the seat cover is put on the seat pad, and pushes up the design surface of the skin piece corresponding to the seam allowance and bulges outward. A seat cover.

2. The seat cover according to Claim 1, A seat cover in which a regulating member for regulating the surface in contact with the seat cover to one side surface is provided at the seam allowance when the seat cover is put on the seat pad.

3. The seat cover according to Claim 1 or Claim 2, In the seam allowance, the fin portion of a hem having a cylindrical portion and a plate-like fin portion extending in the radial direction of the cylindrical portion is co-sewn, The co-sewn skin pieces are folded back so as to surround the outer peripheral surface of the cylindrical portion of the hem, and a design surface corresponding to a part of the outer surface of a cylinder having a larger diameter and concentric with the cylindrical portion is exhibited. A seat cover.

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