JP7063112B2 - Vehicle seat - Google Patents

Description

The present invention relates to a vehicle seat in which an outstitch is provided on a seat cover constituting a design surface. More specifically, the outstitch is a portion in which stitching points between the skins forming the seat cover are arranged in a crossing manner. Regarding the vehicle seats provided in.

This type of seat cover is a face material that constitutes the design surface of a vehicle seat, and is formed by stitching a plurality of skins with institches (linear stitches). The seat cover may be provided with outstitches (linear stitches) exposed on the design surface from the viewpoint of improving the design. This outstitch is formed by setting the seam allowance of the epidermis in a state of being tilted with the institch as the base point and sewing the tilted seam allowance to the corresponding epidermis.

For example, in the vehicle seat disclosed in Patent Document 1, the seat cover of the seat cushion includes the skin of the top plate side portion corresponding to the first skin of the present invention and the skin of the kamachi portion corresponding to the second skin of the present invention. have. The epidermis on the side of the top plate is an epidermis that covers the left side of the upper surface of the seat cushion, and is formed by a first epidermis on the front side and a second epidermis on the posterior side. In the epidermis on the side of the top plate, the first epidermis and the second epidermis are sewn with institches extending in the width direction of the seat, and at the stitched portions of both epidermis, the edges forming the seam allowance of both epidermis. However, they are tilted away from each other with the institch as the boundary. The skin of the gusset portion is a skin that covers the left side surface of the seat cushion, and is composed of a third skin. The upper edge of the epidermis of this gusset part is sewn to the side edge of the epidermis of the top plate side part with other institches, and the other institches are sewn to each epidermis in a state of being extended to the front and back of the seat. There is. Further, outstitches are provided along the other institches at the stitched portions of the epidermis of the top plate side portion and the kamachi portion, and these outstitches are exposed on the design surface and extend in the front-rear direction. When forming the outstitch, for example, the seam allowances are overlapped with each other at the stitched portion between the epidermis of the top plate side portion and the kamachi portion, and these seam allowances are tilted to either side of the epidermis. Then, with a sewing machine, each seam allowance in the folded state is sewn to the corresponding skin by outstitching.

Japanese Patent No. 5375525

By the way, the above-mentioned outstitch is formed at a portion (sewn portion) where these seam allowances are overlapped with each other at the sutured portion of the epidermis of the top plate side portion and the kamachi portion. The sutured portion to form this outstitch is usually a triple-layered portion in which the seam allowance of either epidermis is folded back and the seam allowance of the other epidermis is superimposed. However, in a part of this sutured part, the sutured part (another sutured part) of the first epidermis and the second epidermis forming the side part of the top plate are arranged intersecting each other, and in this other sutured part, The edges (seam allowances) of the first and second epidermis are arranged in a tilted state. Therefore, a part of the sutured portion is in a state where the thickness is excessively increased by the edge of the first epidermis or the second epidermis, and for example, five epidermis may be overlapped. Then, when the outstitch is formed by the sewing machine, the advance of the sewing machine needle is stopped at the thickened stitched portion, and the pitch of the outstitch may be clogged or the stitch may meander. Further, if the seat cover is partially thickened at the sutured portion, the seat cover cannot be neatly arranged according to the shape of the seat, and there is a concern that the finish of the seat may be deteriorated. For example, the sheet shape may be partially raised and curved for the purpose of improving the design. In such a case, the seat cover is curved and arranged according to the shape of the seat. At this time, if the seat cover has a part with excessive thickness and high rigidity, this part is bent obediently. There is a risk that it will be placed at an angle. The present invention was invented in view of the above points, and the problem to be solved by the present invention is to improve the design of the outstitch on the seat cover portion in which the suture points between the skins are arranged in a crossing manner. The purpose is to form the seat cover and further improve the finish of the seat cover.

As a means for solving the above problems, the vehicle seat of the first invention includes a seat cover constituting the design surface, and the seat cover is formed on the first skin and the first skin in which a plurality of skins are sewn together. It has a second epidermis that is sewn, an in-stitch that sews adjacent epidermis to each other, and an out-stitch that is exposed on the design surface. In the present invention, at the seam allowances of the first epidermis and the second epidermis, the seam allowances of the first epidermis and the second epidermis are set to be tilted toward the first epidermis with the institch as the base point to form a sutured portion. , The sutured portion is sewn on the first epidermis side by outstitching. At a part of the sutured portion, another sutured portion between the epidermis forming the first epidermis is arranged so as to intersect with each other. In this type of configuration, it is desirable to form outstitches on the seat cover portion where the suture points between the skins are arranged in a crossed manner with better design, and further improve the finish of the seat cover.

Therefore, in the sutured portion portion which is the forming portion of the outstitch of the present invention, an intersecting region which is an intersection with another sutured portion and a general region other than the intersecting region are provided, and the thickness dimension of the intersecting region is a general region. It is set to be less than or equal to the thickness dimension of. In the present invention, even if another epidermis suture portion (seam allowance) is arranged so as to intersect the suture portion of the first epidermis and the second epidermis, the thickness of the suture portion to which the outstitch should be provided does not partially increase. Is set to. Therefore, in the present invention, the outstitch can be formed more attractively along the sewn portion, and further, by avoiding the partial increase in rigidity of the sewn portion as much as possible, the seat cover can be more appropriately matched to the seat shape. It is possible to place it in.

Further , in the vehicle sheet of the first invention, the seam allowance of the second skin is arranged in the general area so that the seam allowance of the second skin overlaps with the double-layered portion in which the seam allowance of the first skin is folded back and overlapped. Further, in the intersecting region, a portion where the seam allowance of the first epidermis is folded back, another sutured portion, and a seam allowance of the second epidermis are arranged. Then, at another sutured portion, another double-layered portion is provided in which the seam allowances of the pair of epidermis forming the first epidermis are tilted away from each other with another institch as the base point and overlapped with the corresponding epidermis. There is. Therefore, the seam allowance of the second skin is directly overlapped and arranged in another double-layered portion of the crossing region through the notch portion in which the seam allowance of the first skin is partially cut out. In the present invention, by providing a notch in the crossing region of the sutured portion to suppress an increase in the number of overlapping epidermis, it is possible to more reliably avoid an increase in the thickness in the crossing region.

In the vehicle sheet of the first invention, the pair of epidermis in the unfolded state before stitching has a first edge on which a seam allowance for institching is formed and another seam allowance for institching, respectively. It has a second edge that is adjacent to the edge and is arranged orthogonally.
At the corner where the first edge and the second edge intersect, a quadrangular notch portion forming a part of the notch portion is provided, so that the first edge is formed in the portion from the first edge to the second edge. A first side extending from the first side in the same direction as the second edge and a second side extending from the first side in the same direction as the first edge are formed . Therefore, in the present invention, when the dimension in the direction orthogonal to another institch is set as the width dimension in the pair of skins, the width dimension of the notch portion is set to be equal to or larger than the width dimension of the seam allowance for another institch. .. In the present invention, since the width dimension of the notch portion is relatively large, when a pair of epidermis is sutured to form the first epidermis, it is possible to give the notch portion a sufficient width dimension. can. By doing so, the seam allowance for another institch that has been knocked down can be properly stored in the notch of the stitched portion, and the increase in the number of overlapping epidermis in the crossing region can be more reliably avoided. can.

The vehicle seat of the second invention is the vehicle seat of the first invention, and in another seam allowance for institching, the end portion on the corner side is an inclined side. In the present invention, when a pair of epidermises are overlapped with each other to form the first epidermis, another institch can be beautifully formed by using the inclined sides of each as a mark.

The vehicle seat of the third invention is the vehicle seat of the first invention or the second invention. It is sewn. A reverse stitching process is applied to the end of another outstitch, and the reverse stitching process is provided on a planar member applied to the back side of the first skin. In the present invention, another outstitch reverse stitching process can be more appropriately provided via the planar member applied to the back side of the first skin. Therefore, in the present invention, it is possible to more reliably avoid deterioration of the design of the seat cover due to the reverse stitch portion.

The vehicle seat of the fourth invention is the vehicle seat of any one of the first to third inventions, and the seat cover has a seat outer shape and covers a seat pad capable of elastically supporting an occupant. The sutured portion including the intersecting region covers the curved surface portion of the seat pad. The thickness dimension of the sutured portion corresponding to the notch portion is set to be equal to or less than the thickness dimension of the general region in all the portions. In the present invention, the seat cover can be more appropriately arranged according to the seat shape by optimizing the thickness dimension of the sutured portion in the crossing region as a whole and avoiding a partial increase in rigidity as much as possible. ..

According to the first aspect of the present invention, outstitches are formed on the seat cover portion in which the suture points between the skins are arranged in a crossed manner with better design, and the finish of the seat cover is further improved. be able to. Further, according to the first invention, the outstitch can be more reliably formed on the seat cover portion with good design. Further, according to the first invention, the outstitch can be more reliably formed on the seat cover portion with good design. Further, according to the second invention, the finishability of the seat cover can be improved more reliably. Further, according to the third invention, the finishability of the seat cover can be further improved more reliably. According to the fourth invention, the finishability of the seat cover can be further improved and the seat cover can be arranged more appropriately along the curved surface portion.

It is a schematic perspective view of a vehicle seat. It is a perspective view of a part of the upper left side of a seat back. It is a perspective view which looked at the upper left part of a seat back from another angle. It is a front view of each skin in an unfolded state which forms a part of a seat cover. It is an enlarged front view of each epidermis in an unfolded state. It is an enlarged front view which shows a part of the first epidermis in an unfolded state. It is a perspective view of each epidermis at the time of forming the first epidermis. It is a perspective view of the first epidermis and the second epidermis at the time of suturing. It is a perspective view of the first epidermis and the second epidermis when forming an outstitch. It is a perspective front view of the stitched part at the time of forming an outstitch. It is sectional drawing of the suture part corresponding to the cross section of XI-XI line of FIG. It is sectional drawing of the suture part corresponding to the XII-XII line cross section of FIG. It is sectional drawing of a part of a seat back. It is an enlarged front view which shows a part of the 1st epidermis in the developed state which concerns on the modification 1. It is an enlarged front view of the first skin which has been subjected to the reverse stitching process.

Hereinafter, embodiments for carrying out the present invention will be described with reference to FIGS. 1 to 15. For convenience, each figure may appropriately show arrow lines indicating the front-rear direction, the left-right direction, and the up-down direction of the vehicle seat. In FIG. 1, for convenience, only the upper skin of the seat back is designated with a reference numeral. Further, in each figure, for convenience, only a specific institch and a specific outstitch are shown, but each stitch can be provided at an appropriate position on the sheet. Then, in FIG. 6, for convenience, a reference numeral indicating each stitch is attached to the formed portion of each stitch.

The vehicle seat 2 of FIG. 1 has a seat cushion 4 and a seat back 6. These seat constituent members (4, 6) are a seat frame (4F, 6F) forming a seat skeleton, a seat pad (4P, 6P) forming a seat outer shape, and a seat cover (4S, 6S) covering the seat pad, respectively. ). A lower portion of the seat back 6 (details will be described later) is foldably connected to the rear portion of the seat cushion 4. A headrest (not shown) can be arranged in the center of the upper part of the seat back 6.

[Seat back]
The seat back 6 of FIG. 1 is a member having a substantially rectangular shape in front view, which is a backrest of an occupant, and includes the above-mentioned basic configurations 6F, 6P, 6S. The design surface of the seat back 6 is composed of the seat covers 6S shown in FIGS. 1 to 3, and the seat cover 6S is provided with stitching points (X1 to X4) between the skins, and each stitching point is provided with stitching points (X1 to X4). Adjacent epidermis are sewn with corresponding institches (21, 22, etc.). Further, a plurality of outstitches (31 to 34) are provided on the design surface of the seat cover 6S from the viewpoint of improving the design. Then, in this embodiment, specific outstitches 32 and 34 are provided at the portions (X1 and X2, X3 and X4) where the stitching portions of the epidermis are arranged in a crossed manner and are exposed on the design surface. In this type of configuration, the stitching points are arranged in a crossed manner and the seat cover 6S is partially thickened, which deteriorates the appearance of specific outstitches 32 and 34 and adversely affects the finish of the seat cover 6S. There is a risk of exerting it. Therefore, in the present embodiment, the outstitches 32 and 34 are formed in the seat cover 6S portion where the suture points between the skins are arranged in a crossing manner according to the configuration described later, and the finishability of the seat cover 6S is further improved. I decided to improve it further. Hereinafter, each configuration will be described in detail.

[Basic configuration]
The seat back 6 of FIG. 1 is formed by covering a seat pad 6P (not shown) on a seat frame 6F (not shown) with a seat cover 6S. Here, the seat frame 6F is a frame body having an arch shape when viewed from the front, and is made of a metal or a hard resin having excellent rigidity. Further, the seat pad 6P is a member having a substantially rectangular shape when viewed from the front, and with reference to FIGS. 1 to 3, a top plate main portion 10, a pair of left and right top plate side portions 11a and 11b, and a pair of left and right gusset portions. It has 12a and 12b and a pair of left and right raised portions 13 and 14 (in each figure, for convenience, the seat back itself is designated with a reference numeral corresponding to each portion of the seat pad). The material of the seat pad 6P is not particularly limited, and a foamed resin such as polyurethane foam (density: 10 kg / m ³ to 60 kg / m ³ ) can be exemplified. The top plate main portion 10 is a portion extending vertically at the center in the seat width direction (horizontal direction in each figure), and is a portion where an occupant can be seated. Further, each top plate side portion 11a (11b) is a portion that is raised forward on the left side (right side) of the top plate main portion 10. Further, each of the gusset portions 12a (12b) is a portion forming the left surface (right surface) of the seat back 6, and is connected to the outer edge of the corresponding top plate side portions 11a (11b).

[Swelling part (curved surface part of seat pad)]
A left raised portion 13 and a right raised portion 14 are provided on the upper portion of the seat pad 6P in FIG. 1, and a portion between the raised portions 13 and 14 is a recessed portion 15 that is relatively downwardly recessed. It has become. The recessed portion 15 is provided directly above the top plate main portion 10 with reference to FIGS. 2 and 3, and a headrest (not shown) can be arranged via the bracket BR. Further, the left raised portion 13 shown in FIGS. 2 and 3 is a portion in which the upper left portion of the seat back 6 is raised upward. The right side of the left raised portion 13 is a semicircular left standing wall portion 13a rising from the recessed portion 15. The upper surface of the left raised portion 13 has a curved surface shape that gently curves downward from the upper edge of the left standing wall portion 13a. Further, the right raised portion 14 shown in FIG. 1 is a portion in which the upper right portion of the seat back 6 is raised upward, and has a substantially symmetrical shape with the left raised portion 13. The left side of the right raised portion 14 is a semicircular right standing wall portion 14a rising from the recessed portion 15, and the upper surface of the right raised portion 14 gently curves downward from the upper edge of the right standing wall portion 14a. It has a curved surface shape. The upper surfaces of the left raised portion 13 and the right raised portion 14 correspond to the curved surface portions of the seat pad of the present invention, respectively.

[Seat Cover]
The seat cover 6S is formed of a plurality of skins S1 to S6 and the like, with reference to FIGS. 1 to 3, a plurality of institches 21 and 22 and the like, a plurality of outstitches 31 to 34, and a stitched portion. It has 50 (in each figure, for convenience, a specific reference numeral is attached to a specific epidermis, and the reference numerals of other epidermis are omitted). For example, the upper portion of the seat cover 6S is formed of a plurality of skins (S1, S2) on the left side, a plurality of skins (S3, S4) on the right side, and a plurality of skins (S5, S6) in the center. The plurality of central skins are seat cover 6S portions that cover the center of the seat pad 6P in the left-right direction, and are composed of a main skin S5 and an upper surface skin S6. The main skin S5 is a skin that covers the top plate main portion 10, and the upper surface skin S6 is a skin that covers the recessed portion 15.

The left side skins (S1, S2) and the right side skins (S3, S4) shown in FIG. 1 are the skins covering the left side or the right side of the upper part of the seat pad 6P, and the central skins (S5, S6). They are arranged almost symmetrically with each other in between. In this embodiment, the left epidermis (left first epidermis S1, left second epidermis S2) and the right epidermis (right first epidermis S3, right second epidermis S4) are the first of the present invention, respectively. Corresponds to the epidermis and the second epidermis. Since the left epidermis (S1, S2) and the right epidermis (S3, S4) have almost the same basic configuration except that they are symmetrical, the left epidermis (S3, S4) is described below. The details will be described by taking S1 and S2) as an example.

[First epidermis]
Each of the left side skins shown in FIGS. 2 and 3 is a seat cover 6S portion that covers the upper left side portion of the seat back 6, and is composed of a left side first skin surface S1 and a left side second skin surface S2 described later. There is. The left first skin S1 is a skin that covers the upper surface of the left raised portion 13 and the seat cover portions (11a, 12a) arranged below the upper surface. The left second epidermis S2 is formed by suturing a plurality of epidermis as shown in FIGS. 2 to 4, and includes a left inner side epidermis S1a, a left outer side epidermis S1b, and a left kamachi epidermis S1c. It has a left rear epidermis S1d. The left inner side skin S1a and the left outer side skin S1b are skins that cover the left top plate side portion 11a side, and the substantially rectangular left inner side skin S1a has a relatively large area when viewed from the front. .. The left outer side epidermis S1b is an epidermis arranged along the trailing edge of the left inner side epidermis S1a, and has an inverted L-shape and is relatively narrow in the deployed state. The left kamachi epidermis S1c is an epidermis that covers the left kamachi portion 12a side, and has a substantially rectangular shape when viewed from the front and has the largest area. The left rear epidermis S1d is an epidermis that covers the rear side of the left gusset portion 12a, and has an L-shape and is relatively narrow in the unfolded state.

[Pair of epidermis, another institch]
In the left first epidermis S1 shown in FIGS. 2 and 3, the left inner side epidermis S1a, the left outer side epidermis S1b, the left stitched epidermis S1c, and the left rear epidermis S1d are arranged from the front to the rear in this order. Furthermore, adjacent epidermises are sewn together with corresponding institches. For example, at the sutured portion of the left outer side epidermis S1b and the left kamachi epidermis S1c (hereinafter, also referred to as another sutured portion X1), an outer institch 21 which is a linear stitch for suturing adjacent edges of both epidermis is provided. Has been done. The upper side of the outer institch 21 is formed so as to cross the upper surface of the left raised portion 13 to the left and right, and the lower side of the outer institch 21 extends downward. Since the outer institch 21 (and the inner institch 22 described later) is arranged behind the seam between the skins as described later, the seat cover 6S is not exposed to the design surface as much as possible. In this embodiment, the left outer side epidermis S1b and the left kamachi epidermis S1c correspond to a pair of epidermis forming the first epidermis of the present invention. Further, the sutured portion (X1) of the left outer side epidermis S1b and the left kamachi epidermis S1c corresponds to another sutured portion of the present invention, and the outer institch 21 corresponds to another institch of the present invention.

[Second epidermis, institch]
Further, the left second epidermis S2 shown in FIGS. 2 to 4 is an epidermis that covers the left standing wall portion 13a of the left raised portion 13, and has a substantially semicircular shape when viewed from the front in the unfolded state. The upper edge of the left side second epidermis S2 is curved in an arc shape and extends back and forth, and the right edge of the left side first epidermis S1 is sutured. At the stitching points X2 of the left first epidermis S1 and the left second epidermis S2 shown in FIGS. 2 and 3, an inner institch 22 for suturing the adjacent edges of both epidermis is provided. The inner institch 22 corresponds to an institch for suturing the first epidermis and the second epidermis of the present invention, and extends in the anteroposterior direction along the upper edge of the left second epidermis S2. In this embodiment, the sutured portion (X1) of the left outer side epidermis S1b and the left kamachi epidermis S1c is arranged at the substantially apex portion of the upper edge of the left second epidermis S2. That is, another sutured portion X1 is arranged in a cross shape in a part of the sutured portion X2 (the sutured portion 50 described later) of the left side first epidermis S1 and the left side second epidermis S2.

[Outstitch]
Further, referring to FIGS. 2 and 3, the outer outstitch 31 and the inner outstitch 32 are provided in a cross shape on the left side first epidermis S1. The outer outstitch 31 is a linear stitch provided along the stitched portion X1 of the left outer side epidermis S1b and the left kamachi epidermis S1c. The outer outstitch 31 is arranged on the left outer side skin S1b side so as to border the seating surface, crosses the upper surface of the left raised portion 13 to the left and right, and then extends downward. Further, the inner outstitch 32 is a linear stitch formed along the suture portion X2 (the suture portion 50 described later) of the left first epidermis S1 and the left second epidermis S2. The inner outstitch 32 is arranged on the left edge side of the left side first epidermis S1 and extends back and forth along the upper edge of the left side second epidermis S2. And in this embodiment, the outer outstitch 31 corresponds to another outstitch of the present invention, and the inner outstitch 32 corresponds to the outstitch of the present invention.

Here, each of the right skins (S3, S4) shown in FIG. 1 is a seat cover portion that covers the upper right part of the seat back 6, and has substantially the same configuration as each of the left skins (S1, S2). Has been done. That is, each epidermis on the right side is composed of the first epidermis S3 on the right side and the second epidermis S4 on the right side, and is provided with other institches (not shown) and other outstitches 33 and 34. There is. Each of the right skins S3 (S4) has substantially the same configuration as the corresponding skins S1 (S2) on the left side and is arranged symmetrically. Further, each of the other outstitches 33 (34) also has substantially the same configuration as the corresponding outstitch 31 (32) of each skin on the left side and is arranged symmetrically.

[Seat cover forming work]
When forming the seat covers 6S shown in FIGS. 1 to 3, adjacent skins are sewn together with corresponding institches 21 and 22 and the like, and outstitches 31 to 34 are formed at appropriate positions on the seat cover 6S. For example, in this embodiment, the inner outstitch 32 shown in FIG. 3 is provided along the sutured portion X2 (the sutured portion 50 described later) of the left side first epidermis S1 and the left side second epidermis S2, and one of the sutured portions X2. Another stitched portion (X1) is arranged in a crossed manner in the portion. Since the sutured portions (X1, X2) are arranged in a crossed manner in the sutured portion 50, which will be described later, a plurality of regions (general region NA, crossed region CA) and a notch portion 45 (notch portion 45) shown in FIG. 10 ( A notch portion 44) is provided. Since the basic stitching method of each of the skins forming the seat cover 6S is almost the same, the method of forming each stitch will be described below by taking the left side first skin S1 and the left side second skin S2 as an example.

[Formation of the first epidermis (composition of the unfolded epidermis)]
When forming the left first epidermis S1, the unfolded epidermis S1a to S1d shown in FIG. 4 are prepared. Then, the adjacent epidermises are sewn together with the corresponding institches to form the outer outstitch 31 shown in FIG. 3 on the specific epidermis (S1b). Here, since the suturing method of each epidermis in the left first epidermis S1 is almost the same, the shape in the expanded state and the suturing method thereof will be described below by taking the left outer side epidermis S1b and the left kamachi epidermis S1c as an example.

The adjacent verandas of the left outer side epidermis S1b and the left kamachi epidermis S1c in the unfolded state shown in FIG. 5 have a substantially common structure with respect to the unfolded state before suturing. Therefore, each configuration at the time of deployment will be described using the left kamachi epidermis S1c in the unfolded state as an example, and the same reference numerals as those corresponding to the left kamachi epidermis S1c are attached to the left outer side epidermis S1b in parentheses. .. A first edge 41, a second edge 42, and a notch portion 44 are provided on the right front side of the left kamachi epidermis S1c shown in FIGS. 5 and 6. The first edge 41 is a right edge portion extending in the front-rear direction, and is a portion sewn to the upper edge (upper seam allowance M3) of the left side second epidermis S2. A first seam allowance M1 for the inner institch 22 is formed on the first edge 41, and a notch N, which is a triangular notch, is provided at the edge of the first edge 41. Has been done. The second edge 42 is a leading edge portion adjacent to the first edge 41 and extending in the left-right direction, and is a portion sewn to the trailing edge of the left outer side epidermis S1b. A second seam allowance M2 for the outer institch 21 is formed on the second edge 42, as will be described later.

[Notch part]
Further, in the left kamachi epidermis S1c shown in FIGS. 5 and 6, a part of the notch 45 described later is provided at the corner portion (the corner portion on the right front side of each figure) where the first edge 41 and the second edge 42 intersect. The constituent notch portion 44 is provided. That is, the corner portion where the first edge 41 and the second edge 42 intersect is notched in a square shape in the front view at the notch portion 44, and the portion from the first edge 41 to the second edge 42 has a stepped shape. It has become. The cutout portion 44 has a first side 44a extending to the left from the front end of the first edge 41 and a second side 44b extending forward from the left end of the first side 44a.

[Inclined side of the second seam allowance]
In the left seam allowance S1c shown in FIG. 6, the first seam allowance M1 extends back and forth along the first edge 41, and the inner institch 22 (institch of the present invention) is provided at the left end of the first seam allowance M1. It is formed. Further, the second seam allowance M2 extends to the left and right along the second edge 42, and an outer institch 21 (another institch of the present invention) is formed on the trailing edge of the second seam allowance M2. In the second seam allowance M2, the right end edge, which is the end on the corner side having a stepped shape, is the inclined side M2E. This inclined side M2E is a side portion extending forward from the second side 44b, and gradually inclines toward the left as it goes forward, and its appearance is different from that of the stepped cutout portion 44. ..

[Width dimension of notch and second seam allowance]
Further, in the left kamachi skin S1c shown in FIG. 6, when the dimension in the direction orthogonal to the outer institch 21 (front-back direction in FIG. 6) is taken as the width dimension, the width dimension W1 of the notch portion 44 is the second seam allowance M2. The width dimension is set to W2 or more. Therefore, when the second seam allowance M2 is folded back from the outer institch 21 as a base point as described later, the folded second seam allowance M2 is arranged so as to fit in the notch portion 44. In particular, in this embodiment, since the width dimension W1 of the notch portion 44 and the width dimension W2 of the second seam allowance M2 are set to be substantially the same, the edge of the folded second seam allowance M2 is the first of the notch portions 44. It is arranged at a position that substantially coincides with the side 44a, and fits neatly in the notch portion 45 described later. Further, the left and right length dimensions (depth dimensions) W3 of the notch portion 44 are set to the left side of the formation position of the inner outstitch 32 described later. By doing so, the inner outstitch 32 can be more reliably formed in the notch portion 45 described later.

[Formation of outer institch]
With reference to FIG. 7, when suturing the left outer side epidermis S1b and the left kamachi epidermis S1c, these are overlapped in a medium surface shape, and then the second edge 42 side thereof is sutured with the outer institch 21. Here, the left outer side epidermis S1b is also provided with the same configuration (first edge, second edge, notched portion) as the left inner kamachi epidermis (in FIG. 7, for convenience, only the configuration of the left kamachi epidermis). Add the corresponding code). Therefore, by superimposing the left outer side skin S1b and the left seam allowance S1c in a middle surface shape, the corresponding configurations thereof are overlapped in the thickness direction, and the second edge 42 (the inclined side M2E of the second seam allowance M2) is overlapped with each other. ) Is placed on the outermost side. Therefore, when the outer institch 21 is formed by the sewing machine, the outer institch 21 can be formed by using the inclined side M2E of each second seam allowance M2 as a mark. That is, the outer institch 21 is formed by aligning the start point (or end point) of the outer institch 21 with the apex portion (MK) where the inclined side M2E and the second side 44b of each second seam allowance M2 intersect. Can be formed with good finish. As described above, in the present embodiment, by forming the outer institch 21 using the inclined side M2E of the second seam allowance M2 as a mark, it is appropriate that the outer institch 21 is erroneously formed on the notch portion 44 side. Can be avoided.

[Formation of notch]
Next, referring to FIG. 8, when forming the left first epidermis S1, the left outer side epidermis S1b and the left kamachi epidermis S1c are developed in a plane shape with the outer institch 21 as a boundary. Further, at different stitch points X1 of the left outer side epidermis S1b and the left kamachi epidermis S1c, each of these second seam allowances M2 is tilted in a direction away from each other with the outer institch 21 as a boundary. At another stitched portion X1, the cutout portions 44 of both epidermis (S1b, S1c) are opened back and forth around the outer institch 21. Then, each notch portion 44 in the opened state is connected to the outer institch 21 as a boundary, so that the notch portion 45 is formed in the first seam allowance M1 of the left side first epidermis S1 by these notch portions 44. In this embodiment, the width dimensions of each notch portion 44 and each second seam allowance M2 are substantially the same. Therefore, as shown in FIG. 10, each second seam allowance M2 in the folded state of both skins (S1b, S1c) is neatly fitted in the notch portion 45.

[Formation of outer outstitch]
Here, referring to FIGS. 9 and 10, the second seam allowance M2 of the left gusset skin S1c is sewn to the left gusset skin S1c by the outer outstitch 31. At this time, the outer outstitch 31 is formed on the left and right along the second seam allowance M2 of the left kamachi skin S1c, and the end side of the outer outstitch 31 is further subjected to reverse stitching. This reverse stitching process is a process of reciprocating the stitches of the outer outstitch 31 from side to side (usually reciprocating by 2 to 4 pitches). 31E is formed and can be firmly sewn. The reverse stitching process can also be formed by reciprocating the stitches of the inner outstitch 32 back and forth so as to overlap the inner institch 22.

[Suture of the first and second epidermis]
With reference to FIG. 8, when suturing the left side first epidermis S1 and the left side second epidermis S2, the upper edge (upper seam allowance M3) of the left side first epidermis S1 is placed on the left side second epidermis while these are overlapped in a middle surface shape. The left edge of S2 (each first seam allowance M1) is sewn with the inner institch 22. At this time, a notch N, which is a triangular notch, is provided on the upper edge of the left side first epidermis S1 so as to correspond to the left side second epidermis S2. Therefore, the left first epidermis S1 and the left second epidermis S2 can be sutured at appropriate positions while aligning the corresponding notches N with each other. Next, referring to FIG. 9, the left side first skin S1 and the left side second skin S2 are developed in a plane shape with the inner institch 22 as a boundary, so that the seat cover covering the upper left side of the seat pad 6P is covered. A 6S portion is formed. Further, at the stitched portions of the left side first epidermis S1 and the left side second epidermis S2, the first seam allowance M1 of the left side first epidermis S1 and the upper seam allowance M3 of the left side second epidermis S2 are placed on the left side first with the inner institch 22 as a boundary. By tilting it toward the epidermis S1, the seam allowance 50 described later is formed.

[Suture part]
In the sutured portion 50 shown in FIGS. 9 and 10, the seam allowances M1 (M3) of both epidermis S1 (S2) are overlapped at the sutured portion X2 of the left side first epidermis S1 and the left side second epidermis S2, and the left side first epidermis S1 side. It is the part that is defeated. In the stitched portion 50, the upper seam allowance M3 is arranged in a state where the upper seam allowance M3 is overlapped on the folded portion of each first seam allowance M1, and a general region NA and an intersecting region CA, which will be described later, are provided. Then, in this embodiment, the sutured portion 50 is sewn to the left side first epidermis S1 by the inner outstitch 32, but the left side first is sewn on a part of the sutured portion 50 (intersection region CA described later). Another stitched portion X1 provided on one epidermis S1 is arranged so as to intersect with each other. In this other stitched portion X1, each second seam allowance M2 of the left outer side epidermis S1b and the left kamachi epidermis S1c is arranged in a tilted state. In this type of configuration, when a part of the stitched portion 50 is thickened at the second seam allowance M2 of another stitched portion X1, the inner outstitch 32 is caused by the thickened stitched portion 50 portion. There is a risk that the appearance of the product will deteriorate. That is, when the inner outstitch 32 is formed along the suture portion 50 with the sewing machine, the advance of the sewing machine needle is stopped by a part of the thickened suture portion 50, and the pitch of the inner outstitch 32 is increased. There is a risk of clogging or meandering stitches.

[General area]
Here, in the sutured portion 50 portion where the inner outstitch 32 shown in FIGS. 9 and 10 is formed, an intersecting region CA which is an intersection with another sutured portion X1 and a general region NA other than the intersecting region CA are formed. Is provided. Then, in the general region NA of the suture portion 50, with reference to FIG. 11, the left side second seam allowance S2 is placed on the double layered portion (S1c and M1) in which each first seam allowance M1 of the left side first skin S1 is folded back and overlapped. The upper seam allowance M3 is arranged so as to overlap. Therefore, the thickness dimension T1 of the general region NA is the thickness of three corresponding skins. When the inner outstitch 32 is formed by the sewing machine, the general area NA is the typical thickness of the stitched portion 50. Therefore, the amount of elevation of the presser leg or the like of the sewing machine is set based on the thickness of the general area NA. There is. Therefore, if the thickness of the crossing region CA described later is excessively larger than that of the general region NA, the smooth progress of the sewing machine needle may be hindered in the crossing region CA.

[Cross area]
Therefore, in this embodiment, the thickness dimension T2 of the intersection region CA shown in FIGS. 10 and 12 is set to be equal to or less than the thickness dimension T1 of the general region NA. That is, in the crossing region CA, a portion where the first seam allowance M1 of the left side first skin S1 is folded back, another stitching portion X1, and an upper seam allowance M3 of the left side second skin S2 are arranged. The other stitched portion X1 is overlapped with the corresponding epidermis in which the second seam allowances M2 of the pair of epidermis (S1b, S1c) forming the left first epidermis S1 are tilted away from each other with the outer institch 21 as the base point. It is another double-layered portion (S1c and M2, S1b and M2). Therefore, in the present embodiment, with reference to FIGS. 9 and 12, the first seam allowance M1 of the left first skin S1 is partially cut out in another double-layered portion (for example, S1c and M2) of the intersecting region CA. It was decided to directly overlap and arrange the seam allowance M3 of the left side second skin S2 through the notch portion 45. Therefore, the thickness dimension T2 of the intersection region CA in FIG. 12 is the thickness of another double-layered portion (S1c, M2) and three skins of the upper seam allowance M3, and is substantially the same as the thickness dimension T1 of the general region NA shown in FIG. Is set to. As described above, in this embodiment, the notch 45 is provided in the crossed region CA of the sutured portion 50 shown in FIG. 10 to suppress the increase in the number of overlapping epidermiss, thereby more reliably avoiding the increase in the thickness in the crossed region CA. can do. Therefore, when the inner outstitch 32 is formed by the sewing machine, the sewing machine needle can be smoothly advanced in the crossed region CA as in the general region NA, and the inner outstitch 32 can be formed with good appearance.

Thus, in this embodiment, when the seat cover 6S is formed, the left side first epidermis S1 and the left side second epidermis S2 can be appropriately sutured, and the inner outstitch 32 can be formed in a good-looking manner. Further, when forming the right side epidermis S3 and S4 shown in FIG. 1, the corresponding epidermis can be appropriately sutured to each other, and another corresponding inner outstitch 34 can be formed in a good-looking manner. Then, the seat cover 6S can be formed by stitching the left side skins S1 and S2 and the right side skins S3 and S4 to the other skins S5 and S6 and integrating them.

[Seat back forming work]
With reference to FIGS. 1 to 3, the seat pad 6P is arranged on the seat frame 6F and then covered with the seat cover 6S. At this time, the left side skins S1 and S2 and the right side skins S3 and S4 cover the corresponding raised portions 13 and 14, respectively. Since the upper surface side of each of the raised portions 13 and 14 has a curved surface shape, the left side skins S1 and S2 and the right side skins S3 and S4 are arranged while being curved along the curved surface shape. For example, the upper surface side of the left raised portion 13 has a curved surface shape that gently curves downward from the upper edge of the left standing wall portion 13a, and the curved surface portion of the upper surface is sutured with the left first epidermis S1 and the left second epidermis S2. The unit 50 is arranged. In this type of configuration, when the suture portion 50 is thickened at the crossing region CA to increase the rigidity, the suture portion 50 portion may not be obediently curved and may be arranged in an angular shape.

Therefore, in this embodiment, with reference to FIGS. 11 and 12, the thickness dimension T2 of the intersection region CA is set to be substantially the same as the thickness dimension T1 of the general region NA. Therefore, in the sutured portion 50 shown in FIGS. 3 and 13, the general region NA and the crossed region CA have substantially the same rigidity, and the sutured portion 50 of each of the left epidermis S1 and S2 is formed on the left raised portion 13. It is possible to arrange it neatly along the curved surface of the upper surface. In particular, in this embodiment, with reference to FIGS. 10 and 12, the thickness dimension of the sutured portion 50 corresponding to the notch 45 in the thickness direction of the sutured portion 50 is the thickness dimension of the general region NA in all the portions. It is set to the following (equivalent in this embodiment). Therefore, in this embodiment, it is possible to more reliably avoid a partial increase in rigidity in the sutured portion 50, and it is possible to more appropriately arrange the seat cover 6S according to the seat shape. The sutured portions (not shown) of the right epidermis S3 and S4 shown in FIG. 1 can also be neatly arranged along the upper surface of the right raised portion 14. As described above, in this embodiment, the seat cover 6S can be neatly arranged along the curved surface portion, which contributes to the improvement of the finish of the seat.

As described above, in the present embodiment, even if the sutured portion (seam allowance) of another epidermis is crossed and arranged at the sutured portion 50 of the first epidermis (S1 etc.) and the second epidermis (S2 etc.), the outstitch is performed. The thickness of the sutured portion 50 to which (32, etc.) should be provided is set so as not to partially increase. Therefore, in the present invention, the outstitch (32, etc.) can be formed more attractively along the stitched portion 50, and the seat cover 6S is provided by avoiding the partial increase in rigidity of the stitched portion 50 as much as possible. It is possible to arrange them more appropriately according to the shape of the sheet. In particular, in this embodiment, by providing the notch portion 45 in the crossed region CA of the sutured portion 50 to suppress the increase in the number of overlapping epidermises, it is possible to more reliably avoid the increase in the thickness in the crossed region CA. Further, in this embodiment, since the width dimension of the notch portion 44 of the pair of epidermis (S1b, S1c) is relatively large, the pair of epidermis (S1b, S1c) is sutured to the first epidermis (S1 etc.). ) Is formed, the cutout portion 45 can be provided with a sufficient width dimension. By doing so, another seam allowance (M2) for institching that has been knocked down can be appropriately stored in the notch 45 of the stitching portion 50, and the number of overlapping skins in the crossing region CA can be increased. It can be avoided more reliably. Further, in the present embodiment, when the pair of epidermis (S1b, S1c) are overlapped with each other to form the first epidermis (S1 etc.), another institch (31) is formed with good appearance using each inclined side M2E as a mark. Can be done. Then, in this embodiment, the seat cover 6S is more appropriately arranged according to the seat shape by optimizing the thickness dimension of the stitched portion 50 in the crossed region CA as a whole and avoiding a partial increase in rigidity as much as possible. It becomes possible. Therefore, according to this embodiment, the outstitches 32 and 34 are formed in the seat cover 6S portion where the suture points between the skins are arranged in a crossed manner with better design, and the finish of the seat cover 6S is further improved. I can let you.

[Another example]
Here, the method for forming each outstitch may have various configurations in addition to the above-mentioned configurations. For example, in another example shown in FIGS. 14 and 15, the reverse stitching process of the outer outstitch 31 is different from the embodiment in that the reverse stitching process is provided on the planar member 60 applied to the back side of the first skin. .. That is, a planar member 60 having an area that can cover the stitches of the reverse stitch portion (31E) is attached to the first edge 41 side of the left side first skin S1. As the material of this kind of surface member 60, the material exemplified for the seat cover 6S can be used, and a surface material thinner than each skin is typically used. Then, with reference to FIG. 15, when the outer outstitch 31 is formed, the portion (31E) to be reverse stitched is covered with the planar member 60 folded back from the first edge 41. Next, by performing the reverse stitching process of the outer outstitch 31 from above the planar member 60, the reverse stitch portion 31E can be relatively firmly overlapped with the end of the outer outstitch 31. Therefore, in this alternative example, it is possible to more reliably avoid deterioration of the design of the seat cover 6S due to the reverse stitch portion, which contributes to the improvement of the finish of the seat.

The vehicle seat of the present embodiment is not limited to the above-described embodiment, and various other embodiments may be adopted. In the present embodiment, the configuration (shape, dimensions, arrangement position, number of arrangements, components, etc.) of the stitched portion 50 is illustrated, but the configuration of the stitched portion is not limited. For example, in the crossing region of the sutured portion, an example of suppressing an increase in the number of overlapping epidermises at the notch portion has been described. On the other hand, it is possible to make the thickness of each epidermis arranged in the intersecting region smaller than the thickness of each epidermis arranged in the general region. For example, when a pad material such as urethane lami or a back base cloth is integrated on the back side of each skin, it is possible to reduce the thickness dimension by removing the pad material or the back base cloth on each skin in the crossing region. Is. Further, a through hole (or a removed portion such as a pad) may be provided along the formation position of the outstitch in the intersecting region of the suture portion. In this case, the thickness dimension of only the portion such as the through hole is set to be equal to or less than the thickness dimension of the general region. Further, the sutured portion can be arranged at an appropriate position other than the curved portion.

Further, in the present embodiment, the configurations (dimensions, arrangement positions, arrangement numbers, components, etc.) of the general region NA and the intersection region CA are illustrated, but the configuration of each region is not limited. For example, the thickness dimension of the intersection region may be the same as the thickness dimension of the general region, or may be less than the thickness dimension of the general region. Here, the fact that the thickness dimensions of both regions are the same means that the difference due to a slight design error is allowed in addition to the case where the thickness dimensions are exactly the same. It is also possible to make the width of the notch larger than the second seam allowance. In such a case, the seam allowance of the second epidermis directly overlaps the first epidermis through the notch (for two epidermis). The thick part) will occur in the intersection area.

Further, in the present embodiment, the configurations (shape, dimensions, arrangement relationship, number of constituent epidermis, etc.) of the first epidermis (S1 etc.) and the second epidermis (S2 etc.) are illustrated, but the configuration of each epidermis is limited. not. For example, the second epidermis can be composed of a plurality of epidermis, and even in such a case, by providing a notch on the second epidermis side, it is possible to suppress an increase in the number of overlapping epidermis in the crossing region. Is possible. Further, in the pair of skins, the end portion of the second seam allowance may or may not be an inclined side. Further, on the first epidermis, a plurality of different outstitches can be provided and can be omitted. For example, different outstitches may be provided for the second seam allowance of the pair of skins. The outstitch can take various shapes such as a curved shape and a bent shape as well as a linear shape.

Further, in the present embodiment, the seat back 6 has been described as an example, but the configuration of the present embodiment can be applied to various seat constituent members such as a seat cushion, an armrest, and a headrest. In addition, the configuration of each skin can be changed as appropriate according to the seat components. The configuration of this embodiment can be applied to all vehicle seats such as vehicles, aircraft, trains, and ships.

2 Seat for vehicle 4 Seat cushion 6 Seat back 6F Seat frame 6P Seat pad 10 Top plate main part 11a, 11b Top plate side part 12a, 12b Kamachi part 13 Left raised part (curved surface part of the seat pad of the present invention)
13a Left standing wall portion 14 Right raised portion (curved surface portion of the seat pad of the present invention)
14a Right standing wall portion 15 Recessed portion 6S Seat cover 21 Outer institch (another institch of the present invention)
22 Inner institch (institch of the present invention)
31,33 outer outstitch (another outtitch of the present invention)
31E Reverse stitch portion 32,34 Inner outstitch (outstitch of the present invention)
S1 Left first epidermis S1a Left inner side epidermis S1b Left outer side epidermis (one of a pair of epidermis of the present invention)
S1c Left Kamachi epidermis (the other of the pair of epidermis of the present invention)
S1d Left rear skin M1 1st seam allowance (seam allowance for institch of the present invention)
M2 second seam allowance (seam allowance for another institch of the present invention)
M2E Inclined side S2 Left side second epidermis M3 Upper seam allowance S3 Right side first epidermis S4 Right side second epidermis S5 Main epidermis S6 Top surface epidermis X1 Another suture point X2 Suture point 41 First edge 42 Second edge 44 Notch site 44a First Side 44b Second side 45 Notch 50 Seam allowance CA Crossing area NA General area 60 Planar member

Claims (4)

A seat cover constituting the design surface is provided, and the seat cover is an inn in which a first epidermis in which a plurality of epidermis are stitched, a second epidermis stitched to the first epidermis, and adjacent epidermis are stitched together. It has stitches and outstitches that are exposed on the design surface.
At the stitched portion of the first epidermis and the second epidermis, the seam allowances of the first epidermis and the second epidermis are set to be tilted toward the first epidermis with the institch as a base point to form a sutured portion. However, the sutured portion is sewn to the first epidermis side by the outstitch.
In a vehicle seat in which different suture points of the epidermis forming the first epidermis are crossed and arranged in a part of the suture portion.
The sutured portion, which is the place where the outstitch is formed, is provided with an intersecting region which is an intersection with the other sutured portion and a general region other than the intersecting region, and the thickness dimension of the intersecting region is the said. It is set to be less than the thickness dimension of the general area ,
In the general area, the seam allowance of the second skin is arranged so as to overlap with the double-layered portion in which the seam allowance of the first skin is folded back and overlapped.
In the crossing region, a portion where the seam allowance of the first epidermis is folded back, the other sutured portion, and the seam allowance of the second epidermis are arranged.
The other sutured portion is provided with another double-layered portion in which the seam allowances of the pair of epidermis forming the first epidermis are tilted away from each other with another institch as a base point and overlapped with the corresponding epidermis. ,
The seam allowance of the second skin is directly overlapped and arranged in the other double-layered portion of the crossing region through a notch portion in which the seam allowance of the first skin is partially cut out.
The pair of epidermis in the unfolded state before suturing is orthogonal to the first edge on which the seam allowance for the institch is formed and the seam allowance for another institch is formed and adjacent to the first edge, respectively. With a second edge arranged in a shape,
At the corner portion where the first edge and the second edge intersect, a quadrangular notch portion forming a part of the notch portion is provided, so that the portion from the first edge to the second edge is provided. , A first side extending from the first edge in the same direction as the second edge and a second side extending from the first side in the same direction as the first edge are formed.
When the dimension in the direction orthogonal to the other institch is defined as the width dimension in the pair of skins, the width dimension of the notch portion is set to be equal to or larger than the width dimension of the seam allowance for the other institch. Sheet for. The vehicle sheet according to claim 1 , wherein in the other seam allowance for institching, the end portion on the corner portion side is an inclined side . At the other stitch location, at least one of the seam allowances of the pair of epidermis is sewn to the corresponding epidermis side with another outstitch.
A reverse stitching process is applied to the end of the other outstitch, and the reverse stitching process is applied to claim 1 or 2 provided on a planar member applied to the back side of the first skin. The vehicle seat described. The seat cover has a seat outer shape and covers a seat pad that can elastically support an occupant, and the sutured portion including the intersection region covers a curved surface portion of the seat pad.
The vehicle sheet according to any one of claims 1 to 3, wherein the thickness dimension of the sutured portion corresponding to the notch portion is set to be equal to or less than the thickness dimension of the general region in all portions .

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