JP2018192883A - Manufacturing method of epidermis - Google Patents

Abstract

An object of the present invention is to form a notch portion in a seam allowance of a first skin piece with good workability, which serves as an alignment portion with a seam allowance of a second skin piece. A first notched side (41) provided in advance on a first skin piece (11) and a first notched side (41) provided in advance in a first skin piece (11) and a first cutout side (41) provided in advance in a second skin piece (12) with a tip (E1) of a first seam allowance side of a sewn portion (14) as a base point. The notch portion 30 is formed by arranging the two notched sides 42 so as to widen toward the edge of the first seam allowance 21a. [Selection drawing] Fig. 3

Description

  The present invention includes a pair of skin pieces that can form the design surface of a vehicle interior product, and stitches the seam allowances of both skin pieces by aligning the notch portions provided in the seam allowances with the mark as a mark. It relates to a manufacturing method.

  This type of skin is used as a member constituting the design surface of various vehicle interior products, and can be suitably used, for example, as a seat cover for a vehicle seat. The skin is formed by stitching a plurality of skin pieces, and a suture line that stitches the seam allowances of adjacent skin pieces extends in a predetermined direction. For example, in the vehicle seat disclosed in Patent Document 1, the seat cover of the seat cushion includes a first skin piece and a second skin piece corresponding to the first skin piece of the present invention, and a second skin piece of the present invention. And a corresponding third skin piece. The first skin piece is a skin piece that covers the front part of the top plate side part, and the second skin piece is a skin piece that covers the rear part of the top plate side part. The first skin piece and the second skin piece are stitched together at the seam allowance extending in the seat width direction, and the stitching lines of both skin pieces extend in the left-right direction and gradually toward the left. Inclined. Further, the third skin piece is a skin piece that covers the kamachi part, and is stitched to the first skin piece and the second skin piece on the side of the top plate side part. And the other suture lines that sew the skin pieces of the top plate side part and the kerchief part extend in the front-rear direction between the top plate side part and the kerchief part, and intersect with the suture line extending left and right at the top plate side part Is arranged.

  Then, when the seat cover is formed, the adjacent skin pieces are overlapped in a middle shape, and then the seam allowances of both skin pieces are sewn with a sewing machine or the like. At this time, since it is necessary to appropriately position and sew the seam allowances, notches are formed by notching the edges of the corresponding seam allowances at appropriate positions. Then, the seam allowances of adjacent skin pieces are sewn together while aligning notch portions corresponding to these seam allowances.

Japanese Patent No. 5375525

  By the way, in a well-known technique, the 1st skin piece and the 2nd skin piece are stitched | sutured, and the skin piece (1st skin piece of this invention) of the top plate side part side is formed. Further, when sewing the skin piece on the side of the top plate to the third skin piece (the second skin piece of the present invention) on the side of the kerchief part, it is necessary to form notches corresponding to these seams. For this reason, in the configuration of the known technique, it is necessary to form notches corresponding to the seam allowance of each skin piece one by one, and the configuration tends to be slightly inferior in workability. The present invention was devised in view of the above points, and the problem to be solved by the present invention is to provide a notch portion serving as a position to be aligned with a seam allowance of the first skin piece and a seam allowance of the second skin piece. It is to form with good workability.

  As means for solving the above-mentioned problems, the method for manufacturing a skin according to the first invention is a method for manufacturing a skin comprising a first skin piece and a second skin piece that can constitute a design surface of a vehicle interior product. And when sewing the first seam allowance of the first skin piece and the second seam allowance of the second skin piece, align the notch part provided in the first seam allowance with the other notch part provided in the second seam allowance. Meanwhile, the first seam allowance and the second seam allowance are sewn. In this type of skin manufacturing method, it is desirable to be able to form a notch portion, which is a position to be aligned with the seam allowance of the first skin piece, with the seam allowance of the second skin piece with good workability.

  Therefore, in the present invention, the first skin piece and the second skin piece are stitched together to form the first skin piece, so that the seam allowances of the first skin piece and the second skin piece are overlapped and stitched together in the middle surface shape. The sewn portion is provided so as to intersect with the first seam allowance. At this time, starting from the tip of the first seam allowance side of the stitching portion, the first notch side provided in advance in the first skin piece and the second notch side provided in advance in the second skin piece, A notch part is formed by expanding and arranging in a divergent shape toward the edge of the first seam allowance. In the present invention, the first skin piece and the second skin piece are previously provided with corresponding notch sides for configuring the notch portions on the first seam allowance side. And the notch part can be provided in the 1st sewing margin by arrange | positioning appropriately the notch sides of each skin piece simultaneously with the operation | work which sews a 1st skin piece and a 2nd skin piece.

  The manufacturing method of the skin of the second invention is the manufacturing method of the skin of the first invention, wherein the first one side seam allowance of the first skin piece and the second one side seam allowance of the second skin piece are respectively corresponding to the first seam allowance portions. It is provided in a direction intersecting with each other, and a seam portion which is a place where a suture line is formed at each one-side seam allowance is extended in the intersecting direction together with the cutting edge. Then, by sequentially performing the following first step, second step and third step, the first skin piece and the second skin piece are each provided with a cut-out side corresponding to each other, and the stitching workability of both skin pieces is further improved. It was decided to improve.

  That is, in the manufacturing method of the skin of the second invention, in the first step, the stitch portion corresponding to the first notch of the polygonal shape including the notch side at the edge of the first stitch allowance side of the first one-side stitch allowance is provided. The polygonal second notch including the second notch side reaches the corresponding seam portion at the edge of the first stitch margin side of the second skin piece adjacent to the second half stitch margin. Provide as follows. Next, in the second step, the corner portion of the second one-side seam allowance adjacent to the second notch is cut obliquely from the contact point between the second notch side and the seam portion to form a cut-off side. The end portion of the second skin piece surrounded by the notched side and the cut-off side is formed into an obtuse triangular shape. And, in the third step, in the state where the seam allowances of the first skin piece and the second skin piece are overlapped in the middle surface shape, a suture line is formed on the seam portion of the seam allowance of each skin piece. Is arranged so as to face the apex of the end portion of the second skin piece having a triangular shape. In the present invention, by performing the first step and the second step, the cutout side corresponding to each skin piece is formed, and the end portion of the second skin piece surrounded by the second cutout side and the cutout side is further formed. An obtuse triangular shape is used. In the third step, the seam allowances of the first skin piece and the second skin piece are stitched together, and a suture line for stitching these seam allowances is arranged so as to face the apex of the end portion of the second skin piece that forms a triangle shape. To do. At this time, by making the end of the second skin piece an obtuse triangular shape and increasing the surface area of the skin piece in the same part, it becomes possible to more clearly recognize the vertex position of the end of the second skin piece, It becomes the structure which contributes to the improvement of the stitching | working workability of pieces.

  The method for manufacturing the skin of the third invention is the method for manufacturing the skin comprising the third skin piece that can form the design surface of the vehicle interior product in the method for manufacturing the skin of the first invention or the second invention. Moreover, the 1st skin piece has the 1st seam allowance of the opposite side provided in the opposite side to the 1st seam allowance in the extension direction of the stitching | suture part. When the first seam allowance on the opposite side of the first skin piece and the third seam allowance on the third skin piece are sewn, the notch on the opposite side provided in the first seam allowance on the opposite side and the third seam allowance are provided. While aligning the other notches, the first seam allowance and the third seam allowance on the opposite side are sewn. Therefore, in the present invention, the stitching portion is provided in a cross shape with respect to the first seam allowance on the opposite side. At this time, starting from the tip of the first seam allowance side opposite to the stitched portion, the third notch side provided in advance in the first skin piece and the fourth notch side provided in advance in the second skin piece Are expanded and arranged in a divergent shape toward the edge of the first seam allowance on the opposite side, thereby forming a notch portion on the opposite side. In the present invention, the first skin piece and the second skin piece are previously provided with corresponding notch sides for forming the opposite notch portions on the opposite first seam allowance side. And the notch part of an opposite side can be provided in the 1st seam allowance of an other side by arrange | positioning appropriately the notch sides of each skin piece simultaneously with the operation | work which sews a 1st skin piece and a 2nd skin piece.

  The method for manufacturing the skin of the fourth invention is the method for manufacturing the skin of any one of the first to third inventions, wherein at least one of the notch portions opposite to the notch portions and the corresponding other notch portions are respectively It has a notch-shaped triangular shape that can align the apex sides with each other. In the present invention, since at least one of the notch portion opposite to the notch portion and the corresponding other notch portion have a triangular shape suitable for alignment, the position of the first seam allowance relative to the second seam allowance and the third seam allowance Matching work can be performed more reliably.

  According to the 1st invention concerning the present invention, the notch part used as an alignment part with the seam allowance of the 1st skin piece and the seam allowance of the 2nd skin piece can be formed with sufficient workability. Moreover, according to the 2nd invention, a notch part can be formed with sufficient workability | operativity for the seam allowance of the 1st skin piece. According to the third invention, both the notch portion and the notch portion on the opposite side can be formed with good workability in the seam allowance of the first skin piece. And according to 4th invention, the notch part suitable for position alignment with the seam allowance of the other skin piece or the notch part of the other side can be formed with sufficient workability | operativity for the seam allowance of the 1st skin piece.

It is a perspective view of a vehicle seat. It is a perspective view of a part of the seat cushion. It is a perspective view of a part of the first skin piece. It is a perspective view of the 1st skin piece and the 2nd skin piece at the time of a sewing operation | work. It is a front view of each skin piece. It is a front view of each skin piece at the time of a 1st process. It is a front view of each skin piece at the time of a 2nd process. It is a front view of each skin piece at the time of a 3rd process. It is a front view of a part of first skin piece. It is a front view of each skin piece which shows the manufacturing process of a modification. It is a front view of each skin piece which shows the sewing process of a modification. It is a front view of some 1st skin pieces of a modification.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to FIGS. In FIG.1 and FIG.2, the arrow line which shows the front-back direction, the up-down direction, and the left-right direction of a vehicle seat is illustrated. Moreover, in the figure which shows the skin piece and the skin piece, the arrow line which shows the front-back direction, the up-down direction, and the left-right direction may be suitably illustrated on the basis of the state arrange | positioned in the vehicle seat.

  A vehicle seat 2 in FIG. 1 is a vehicle interior that is disposed in a vehicle interior, and includes a seat cushion 4, a seat back 6, and a headrest 8. These seat constituent members (4, 6, 8) respectively cover the seat frame (4F, 6F, 8F) forming the seat skeleton, the seat pad (4P, 6P, 8P) forming the seat outer shape, and the seat pad. It has a seat cover (4S, 6S, 8S). And the lower part of the seat back 6 of the standing state is connected with the rear part of the seat cushion 4 so that it can fall. A headrest 8 is disposed above the seat back 6 in the standing state.

[Seat cushion]
Referring to FIG. 1, the seat cushion 4 is formed by covering a seat pad 4P (not shown) on a seat frame 4F (not shown) and then covering with a seat cover 4S (details will be described later). Here, the seat frame 4F is typically a substantially rectangular frame as viewed from above, and can be formed of a material having excellent rigidity such as metal or hard resin. The seat pad 4P is a substantially rectangular member as viewed from above, which forms the outer shape of the seat, and can be formed of a foamed resin such as polyurethane foam (density: 10 kg / m ^{3 to} 60 kg / m ³ ). With reference to FIG. 1, the seat pad 4 </ b> P is formed with a top plate main portion 4 a exclusively serving as a seating position for the occupant in the center in the seat width direction. Further, on the left side and the right side of the top plate main portion 4a, there are formed a top plate side portion 4b that protrudes relatively to the seating side and a kamachi portion 4c that forms the seat side surface.

[Seat cover (skin)]
And the seat cover 4S is a face material corresponding to the skin of the present invention, and has a plurality of skin pieces SP1 to SP3 (details will be described later) that can constitute the design surface of the sheet (in FIG. 1, for convenience, A specific code SP1 to SP3 is given to a specific skin piece, and a common code SP is given to the other skin pieces). Here, the first skin piece SP1 is a skin piece that covers the left top plate side portion 4b, the second skin piece SP2 is a skin piece that covers the left side keratin portion 4c, and the third skin piece SP3 is It is the skin piece which coat | covers the top-plate main part 4a. Examples of the material of each of the skin pieces SP1 to SP3 include cloth (woven fabric, knitted fabric, non-woven fabric) and leather (natural leather, synthetic leather) made of natural fibers or synthetic fibers.

  And in the formation operation | work of the seat cover 4S mentioned later, several skin pieces SP1-SP3 etc. are stitch | sutured. In this type of suturing operation, it is necessary to appropriately sew the seam allowances (21a and 22, 21b and 23, etc.) of adjacent skin pieces with reference to FIG. For example, in the present embodiment, with reference to FIGS. 2 to 4, a left first seam allowance 21a of a first skin piece SP1 and a second seam allowance 22 of a second skin piece SP2 which will be described later are sewn. At this time, as shown in FIGS. 3 and 4, the left notch portion 30 (detailed later) provided in the left first seam allowance 21 a is aligned with the second notch portion 32 (detailed later) provided in the second seam allowance 22. Meanwhile, the left first seam allowance 21a and the second seam allowance 22 are sewn. In this type of manufacturing method of the seat cover 4S, the left notch portion 30 serving as a position to be aligned with the second seam allowance 22 of the second skin piece SP2 is provided on the left first seam allowance 21a of the first skin piece SP1 with good workability. It is desirable that it can be formed. Therefore, in the present embodiment, the left notch portion 30 is formed with good workability in the first first seam allowance 21a of the first skin piece SP1 with the configuration described later. Hereinafter, each configuration will be described in detail.

[First skin piece (each skin piece)]
1 and 2, the first skin piece SP1 is a vertically long skin piece before and after covering the left top plate side portion 4b. 2 to 4, the first skin piece SP1 includes a first skin piece 11 that forms the front side, a second skin piece 12 that forms the rear side, and both skin pieces 11 and 12. It has the stitching | suture part 14 which is a stitching | suture location. The stitching portion 14 is formed by overlapping stitch margins (11a, 12a), which will be described later, of the first skin piece 11 and the second skin piece 12 in a middle surface shape and stitching at the first stitch line L1. It extends in the left-right direction in a state of being disposed on the back side of the seat cover 4S. The stitching portion 14 (first stitching line L1) is gradually inclined rearward from the right end toward the left end. The left end of the stitching portion 14 is disposed at the rearmost position, and the right end of the stitching portion 14 is at the most forward position. Has been placed. The first skin piece 11 has a substantially rectangular shape when viewed from the front and back, and the rear edge side of the first skin piece 11 is inclined in the same direction as the stitched portion 14. On the rear edge of the first skin piece 11, a first one-side seam allowance 11a serving as a stitching portion 14 is provided and extends in the left-right direction. The second skin piece 12 also has a substantially rectangular shape when viewed from above in the front and rear direction, and the front edge side of the second skin piece 12 is inclined in the same direction as the stitched portion 14. The front edge of the second skin piece 12 is provided with a second one-side seam allowance 12a that becomes the stitching portion 14, and extends in the left-right direction.

[First seam allowance / notch]
The first skin piece SP1 is provided with a left first seam allowance 21a and a right first seam allowance 21b in order to be sewn to other skin pieces to be described later with reference to FIG. 2 and FIG. The left first seam allowance 21a is a portion corresponding to the first seam allowance of the present invention, is provided along the left edge of the first skin piece SP1, and is sewn to the second skin piece SP2 to be described later with a second suture line L2. Is done. In addition, the front side of the left first seam allowance 21a is gradually curved toward the right side according to the sheet shape as shown in FIG. The left first seam allowance 21a is provided with a left notch 30 serving as a position for alignment with the second skin piece SP2. The left notch portion 30 is a triangular notch-like portion provided at the left edge of the left first seam allowance 21 a, and the apex of the left notch portion 30 is on the left first seam allowance side of the suture portion 14. It is arranged so as to substantially coincide with the tip (left tip E1). The left notch portion 30 is a portion corresponding to the notch portion of the present invention, and is formed by notch sides 41 and 42 described later of the first skin piece 11 and the second skin piece 12 (the left notch portion). The formation method will be described later).

[First seam allowance on the opposite side, notch on the opposite side]
Further, the right first seam allowance 21b is a portion corresponding to the first seam allowance on the opposite side of the present invention, and is provided along the right edge of the first skin piece SP1, and is sewn to a third skin piece SP3, which will be described later. Sutured at line L3. The right first seam allowance 21b is provided with a right notch 31 serving as an alignment position with the third skin piece SP3. The right notch 31 is a triangular notch-like portion provided at the right edge of the right first seam allowance 21b, and the apex of the right notch 31 is the tip of the right first seam allowance side of the suture part 14. It is arranged so as to substantially coincide with (the right end E2). The right notch portion 31 is a portion corresponding to the notch portion on the opposite side of the present invention, and is formed by notches 43 and 44 described later of the first skin piece 11 and the second skin piece 12.

[Second skin piece]
1 and 2, the second skin piece SP2 is a vertically long skin piece before and after covering the left keratin portion 4c, and a second seam allowance 22 extending in the front and rear direction is provided on the upper edge. It has been. The second seam allowance 22 is a part that is sewn to the left first seam allowance 21a of the first skin piece SP1 at the second stitching line L2, and with reference to FIG. A second notch portion 32 is provided. The second notch 32 is a portion corresponding to another notch provided in the second seam allowance of the present invention, and is formed by cutting out the upper edge of the second seam allowance 22. And the 2nd notch part 32 has the shape which can align vertexes with respect to the left side notch part 30 of the left side 1st seam allowance 21a with reference to FIG. 30 has a triangular shape that is approximately the same shape and size.

[Third skin piece]
1-3, 3rd skin piece SP3 is the substantially rectangular skin piece which coat | covers the top-plate main part 4a, has comprised the front skin piece 13a which has comprised the front side, and the rear side. The rear skin piece 13b is formed. A third seam allowance 23 extending in the front-rear direction is provided at the left edge of the third skin piece SP3. The third seam allowance 23 is connected to the right first seam allowance 21b of the first skin piece SP1 by the third sewing line L3. This is the place to be stitched. And the 3rd sewing allowance 23 is provided with the 3rd notch part 33 used as the alignment location with the right side 1st sewing allowance 21b with reference to FIG. The third notch 33 is a portion corresponding to another notch provided in the third seam allowance of the present invention, and is formed by cutting out the left edge of the third seam allowance 23. And the 3rd notch part 33 has the shape which can align vertexes with respect to the right notch part 31 of the right side 1st seam allowance 21b, and is substantially the same shape and the same dimension as the right notch part 31 in a present Example. It has a triangular shape.

[Forming seat cover]
The seat cover 4S shown in FIGS. 1 and 2 is formed by stitching a plurality of skin pieces SP1 to SP3 and the like. Here, since the stitching methods for the plurality of skin pieces are generally the same, these stitching methods will be described below by taking the first skin piece SP1 and the second skin piece SP2 as an example. When sewing both skin pieces SP1 and SP2 shown in FIG. 4, while aligning the left notch portion 30 of the left first seam allowance 21a with the second notch portion 32 of the second seam allowance 22a, The second seam allowance 22 is sutured at the second suture line L2. For this reason, it is necessary to provide notches 30 and 32 corresponding respectively to the left first seam allowance 21a and the second seam allowance 22 in advance. In this type of configuration, it is desirable that the left notch portion 30 can be formed with good workability in the left first seam allowance 21a.

[Formation of notch]
Therefore, in this embodiment, referring to FIG. 3 and FIG. 4, notched sides 41 and 42 for forming the left notch portion 30 are provided in the first skin piece 11 and the second skin piece 12 in advance. (The method of forming each notch side will be described later). When the first skin piece SP1 is formed, the left notch portion 30 is provided in the left first seam allowance 21a by using the notched side 41 (42) of each skin piece 11 (12). That is, as shown in FIG. 8 and FIG. 9, after the first skin piece 11 and the second skin piece 12 are stitched in a state of being overlapped in the middle face shape, both the skin pieces 11 and 12 are developed into a planar shape and are first developed. The skin piece SP1 is formed. In this way, the stitching portion 14 in which the seam allowances (11a, 12a) of the first skin piece 11 and the second skin piece 12 are overlapped and stitched in the middle face shape is provided so as to intersect with the left first seam allowance 21a. Then, with the left end E1 of the stitching portion 14 as a base point, the first notch side 41 of the first skin piece 11 and the second notch side 42 of the second skin piece 12 are connected to the edge of the left first seam allowance 21a. The left notch part 30 is formed by expanding and arranging in a divergent shape as it goes. As described above, in this embodiment, the first stitch margin 21a on the left side is obtained by appropriately arranging the notched sides 41 and 42 of each skin piece simultaneously with the operation of sewing the first skin piece 11 and the second skin piece 12 together. The left notch portion 30 can be formed.

[Method for forming each notch]
Next, referring to FIGS. 5 to 9, corresponding notch sides 41 and 42 are provided in advance in the first one-side seam allowance 11 a of the first skin piece 11 and the second one-side seam allowance 12 a of the second skin piece 12. The method will be explained. At this time, referring to FIG. 5, the first one-side seam allowance 11a and the second one-side seam allowance 12a are inclined in the direction inclined with respect to the corresponding left first seam allowance 21a (direction in which θ0> 90 ° in FIG. 5). Provided, and gradually extends backward as it goes to the right. In this way, at each one-side seam allowance 11a (12a), the seam portion LM1 (LM2), which is the place where the first suture line L1 is formed, is obliquely extended together with the cutting edge EE1 (EE2). And by performing the following 1st process, 2nd process, and 3rd process sequentially, the notch sides 41 and 42 corresponding to the 1st skin piece 11 and the 2nd skin piece 12, respectively are provided, and both skin pieces 11, 12 sewing workability was improved.

[First step]
In the first step, in the first skin piece 11 shown in FIG. 6, a first notch 51 is provided at the edge on the left first sewing allowance 21a side of the first one-side sewing allowance 11a. The first notch 51 is a triangular notch including the first notch side 41 and is provided so as to reach the corresponding stitch portion LM1. That is, in the first notch 51, the first notch side 41 and the rear side 60 forming the front side are arranged in a substantially V-shaped manner, and the apex side coincides with the formation position of the seam portion LM1. Has been placed. In forming the first notch 51, for example, it is desirable to provide a generally triangular notch and then trim an appropriate part of the notch to an appropriate shape. For example, the rear side 60 of the first notch 51 is a position where a cut-off side 61 (described later) of the second skin piece 12 is aligned during a suturing operation with the second skin piece 12 described later. For this reason, the rear edge 60 of the first notch 51 is slightly cut off to prepare the shape, so that the shape following the cut edge 61 of the second skin piece 12 can be obtained.

  In the first step, in the second skin piece 12 shown in FIG. 6, a second notch 52 is provided at the edge on the left first seam allowance 21a side of the second skin piece 12 adjacent to the second piece side seam allowance 12a. The second cutout 52 is a triangular cutout including the second cutout side 42 and is provided so as to reach the corresponding stitch portion LM2. That is, in the second notch 52, the second notch side 42 that forms the rear side and the front side 60a are spaced apart in a substantially V shape, and the apex side is the formation position of the stitch portion LM2 (in FIG. 6). It is arranged in accordance with the contact CP). Note that the front side 60a of the second notch 52 is a side that does not remain at the time of the suturing operation because it is removed by a second step described later.

[Second step]
In the second step, in the second skin piece 12 shown in FIG. 7, the corner 54 of the second piece side seam allowance adjacent to the second notch 52 is used as a contact CP between the second notch 52 and the stitch portion LM2. The cut-off side 61 is formed by cutting off diagonally. At this time, by adjusting the angle θ1 of the cut-out side 61 with respect to the second cut-out side 42, the end portion 12E of the second skin piece surrounded by the second cut-out side 42 and the cut-out side 61 has an obtuse triangular shape (90 It is molded into a triangular shape of ° <θ1 <180 °. The angle between the second cut-out side 42 and the cut-off side 61 is not particularly limited as long as it is an obtuse angle. For example, as a triangular shape of 120 ° <θ1, the surface area of the end portion 12E of the second skin piece is made as large as possible. It is desirable to keep it. In this way, in the present embodiment, by performing the first step and the second step described above, the notched side 41 (42) corresponding to each skin piece 11 (12) is formed, and further, the second notched side 42 and the cut-off side 42 are cut off. An end portion 12E of the second skin piece surrounded by the side 61 is made into an obtuse triangular shape.

[Third step]
In the third step, referring to FIG. 8, the first skin piece 11 and the second skin piece 12 are superposed in a middle surface shape, and these are stitched together with a first suture line L1. At this time, in the state where the seam allowances (11a, 12a) of the first skin piece 11 and the second skin piece 12 are overlapped in a middle surface shape, the cut-off side of the second notch 51 is placed on the rear side 60 of the first notch 51. 61 is matched. In this state, the first suture line L1 is formed on the seam portions LM1, LM2 of the seam allowances of the respective skin pieces 11, 12, so that the first suture line L1 is connected to the end of the second skin piece having a triangular shape. It arrange | positions so that it may go to the vertex of 12E. At this time, the second skin piece 12 of the present embodiment increases the surface area of the skin piece by making the end 12E of the second skin piece an obtuse triangular shape. For this reason, it is in a state in which the operator can relatively easily recognize the apex position (end position or end position of the stitching) of the end portion 12E of the second skin piece, which is a key for the suturing work (a modified example of FIG. 11 described later). The end portion 12EA of the second skin piece according to the above is used for comparison). That is, when the first stitch line L1 is formed starting from the end portion 12E of the second skin piece, the apex of the end portion 12E of the second skin piece is the start of stitching. When forming the first suture line L1 with the end portion 12E of the second skin piece as the end point, the vertex of the end portion 12E of the second skin piece is the end of the stitching. In this embodiment, since the apex position (end or end position of the stitching) of the end portion 12E of the second skin piece is easily understood, the occurrence of sewing displacement or the like of the first suture line L1 is avoided as much as possible. It becomes the structure which contributes to the improvement of sewing workability. Further, by forming the first suture line L1 so as not to shift toward the vertex of the end portion 12E of the second skin piece, the vertex side of the end portion 12E of the second skin piece is the second piece side of the second skin piece 12. The seam 12a is firmly sewn and fixed. When the above-described first skin piece S1 and second skin piece S2 are stitched together, problems such as the top side of the end portion 12E of the second skin piece turning up and becoming wrinkles are avoided as much as possible. The structure contributes to improving the finishing performance of SP1 and SP2.

  And as shown in FIG. 9, the 1st skin piece 11 and the 2nd skin piece 12 are expand | deployed in planar shape on the basis of the stitching | suture part 14, and 1st skin piece SP1 is formed. In this state, the stitching portion 14 is disposed on the back side of the first skin piece SP1 and extends in the left-right direction, and the left first seam allowance 21a is provided on the left edge of the first skin piece SP1 and extends in the front-rear direction. . Then, the first notch side 41 of the first one-side seam allowance 11a and the second notch side 42 of the second one-side seam allowance 12a are arranged so as to expand in a divergent shape starting from the left end E1 of the stitching portion 14. It becomes. Thus, according to the present embodiment, simultaneously with the sewing operation of the skin pieces 11 and 12, the first notch side 41 provided in advance in the first one-side seam allowance 11a and the second provided in advance in the second one-side seam allowance 12a. The left notch portion 30 can be formed at the notched side 42.

[Formation of opposite notch]
Further, in the present embodiment, referring to FIGS. 2 and 3, the third seam allowance 23 of the third skin piece SP3 on the top plate main part side is stitched to the right side of the first skin piece SP1. For this reason, as shown in FIG. 3, the right first seam allowance 21 b of the first skin piece SP <b> 1 is provided on the right side opposite to the left first seam allowance 21 a in the left-right direction that is the extending direction of the stitching portion 14. When sewing both skin pieces SP1 and SP3 shown in FIG. 3, the right notch 31 of the right first seam allowance 21b is aligned with the third notch 33 of the third seam allowance 23 while the right first seam allowance 21b and The third seam allowance 23 is sewn at the third suture line L3. In this type of configuration, like the left notch portion 30, it is desirable that the right notch portion 31 can be formed with good workability even at the right first seam allowance 21b.

  Therefore, in the present embodiment, referring to FIG. 3, cutout sides 43 and 44 for forming the right notch portion 31 are provided in the first skin piece 11 and the second skin piece 12 in advance. When the first skin piece SP1 is formed, the right notch portion 31 is provided in the right first seam allowance 21b by using the notched side 43 (44) of each skin piece 11 (12). That is, after the first skin piece 11 and the second skin piece 12 are sewed in a state where they are overlapped in the middle face shape, both the skin pieces 11 and 12 are developed in a planar shape to form the first skin piece SP1. In this way, the stitching portion 14 is provided so as to intersect the right first sewing allowance 21b. Then, with the right end E2 of the stitching portion 14 as a base point, the third notch side 43 of the first skin piece 11 and the fourth notch side 44 of the second skin piece 12 are connected to the edge of the right first seam allowance 21b. The right side notch part 31 is formed by expanding and arranging in a divergent shape as it goes. Thus, in this embodiment, the right first seam allowance 21b is obtained by appropriately arranging the cut-out sides 43 and 44 of each skin piece simultaneously with the operation of sewing the first skin piece 11 and the second skin piece 12 together. The right notch 31 can be formed.

  Here, the above-described third cut-out side 43 and fourth cut-out side 44 are formed on the corresponding skin pieces by the same formation method as the above-described formation method of the first cut-out side 41 and the second cut-out side 42. Is done. And with reference to FIG. 8, the edge part 12E of the 2nd skin piece is provided in the left side of the 2nd skin piece 12 at the time of a 3rd process, and each notch side 43, With the formation of 44, an end (not shown) of the second skin piece having an obtuse triangular shape is provided. For this reason, the vertex positions of the end portions (12E, etc.) of the left and right second skin pieces, which are important for the sewing operation, can be easily understood by the operator. That is, when the first suture line L1 is formed starting from the end portion 12E of the left second skin piece, the apex of the end portion 12E of the second skin piece is the start of sewing, The end is the end of stitching. Further, when forming the first suture line L1 with the end portion 12E of the second skin piece as the end point, the end portion of the right second skin piece is the start of sewing, and the vertex of the end portion 12E of the second skin piece is End of stitching. In this embodiment, the top positions (12E and the like) of the left and right second skin pieces are easily understood, so that the structure further contributes to improving the workability of the skin pieces. It becomes.

  As described above, in the present embodiment, the first skin piece 11 and the second skin piece 12 are provided with notch sides 41 and 42 corresponding to the left notch portion 30 on the left first sewing margin 21a side in advance. Keep it. At the same time as the operation of stitching the first skin piece 11 and the second skin piece 12, the notch sides 41 and 42 of the skin pieces 11 and 12 are appropriately arranged so that the left notch portion 30 is formed on the left first sewing margin 21 a. Can be provided. In the present embodiment, the first step and the second step are performed to form notched sides 41 and 42 corresponding to the respective skin pieces 11 and 12, and further surrounded by the second notched side 42 and the cut-off side 61. The end portion 12E of the second skin piece is made into an obtuse triangular shape. In the third step, the seam allowances 11a and 12a of the first skin piece 11 and the second skin piece 12 are sewn, and the first suture line L1 for stitching these seams together is the end of the second skin piece that forms a triangle shape. It arrange | positions so that it may go to the vertex of the part 12E. At this time, by making the end 12E of the second skin piece an obtuse triangular shape and increasing the surface area of the skin piece in that portion, it becomes possible to more clearly recognize the apex position of the end 12E of the second skin piece. The construction contributes to the improvement of the sewing workability between the skin pieces.

  Further, in this embodiment, the first skin piece 11 and the second skin piece 12 are each provided with a right notch portion 31 (opposite notch portion) on the right first stitch margin 21b (opposite first stitch margin) side. Corresponding notch sides 43 and 44 are provided in advance. At the same time as the operation of sewing the first skin piece 11 and the second skin piece 12, the right notch portion 31 is formed in the right first seam allowance 21 b by appropriately arranging the notched sides 43, 44 of the skin pieces 11, 12. Can be provided. Further, in this embodiment, at least one of the left notch portion 30 and the right notch portion 31 and the corresponding other notch portions (second notch portion 32, third notch portion 33) are triangular shapes suitable for alignment. is there. For this reason, it is possible to perform the positioning operation of the first seam allowances 21 and 21b with respect to the second seam allowance 22 and the third seam allowance 23 more reliably. For this reason, according to the present embodiment, the left notch portion 30 serving as a position to be aligned with the seam allowance of the second skin piece SP2 can be formed with good workability at the left first seam allowance 21a of the first skin piece SP1.

[Modification]
Here, the right notch portion 31 of the right first seam allowance 21 b shown in FIG. 3 can be provided regardless of the stitching of the first skin piece 11 and the second skin piece 12. That is, in this modification, a method of separately providing the right notch portion 31 in the right first seam allowance 21b shown in FIG. 3 after forming the first skin piece SP1 will be described with reference to FIGS. 10 to 12, the first one-side seam allowance 11a and the second one-side seam allowance 12a are gradually extended toward the left as they go downward in the drawing to facilitate comparison with the first embodiment. Show.

  In the present modification, in the second skin piece 12 shown in FIG. 10, the corner portion 54A of the second piece side seam allowance on the right side first seam allowance 21b side is obliquely cut off from the end of the seam portion LM2, and another cut side 61A is provided. Form. At this time, the end portion 12EA of the second skin piece is formed into an acute triangular shape (triangular shape of θ2 <90 °) by the cut-off side 61. Here, the meaning that the end portion 12EA of the second skin piece is an acute angle means that, when the skin pieces 11 and 12 shown in FIG. 11 are stitched, another cut edge 61A is connected to the edge 60A (right side This is to make it coincide with the edge of one stitch allowance 12a.

  Next, referring to FIG. 11, the first skin piece 11 and the second skin piece 12 are superposed in a middle surface shape, and these are stitched together by the first suture line L1. At this time, in the state where the seam allowances (11a, 12a) of the first skin piece 11 and the second skin piece 12 are overlapped in the middle surface, another cut edge 61 is made to coincide with the edge 60A on the second one side seam allowance side. Keep it. In this state, the first suture line L1 is formed on the seam portions LM1, LM2 of the seam allowances of the respective skin pieces 11, 12, so that the first suture line L1 is connected to the end of the second skin piece having a triangular shape. It arrange | positions so that it may go to the vertex of 12EA. And in the 2nd skin piece 12 of this modification, the edge part 12EA of the 2nd skin piece becomes an acute-angled triangle shape, and the surface area is comparatively small.

  Then, as shown in FIG. 12, the first skin piece 11 and the second skin piece 12 are developed into a planar shape with the stitching portion 14 as a base point to form a first skin piece SP1. In this state, the stitching portion 14 is disposed on the back side of the first skin piece SP1 and extends in the left-right direction, and the right first seam allowance 21b is provided on the right edge of the first skin piece SP1 and extends in the front-rear direction. . In the present modification, the right edge of the first skin piece 11 and the right edge of the second skin piece 12 are substantially in a straight line. For this reason, as shown in FIG. 3, the right notch portion 31 is separately formed by notching the edge of the right first seam allowance 21b in a triangular shape.

  The manufacturing method of the skin of this embodiment is not limited to the above-described embodiment, and can take other various embodiments. In the present embodiment, the configurations (shape, dimensions, etc.) of the left notch portion 30, the right notch portion 31, and the other notch portions 32 and 33 are exemplified, but the configuration of each notch portion is not intended to be limited. For example, each notch part can be formed in a polygonal shape having a vertex, and in this case, the corresponding notch side has a corresponding shape. For example, when a pentagonal notch portion is provided, the corresponding notch side is formed to be bent in an L shape. In addition, the notch portion opposite to the notch portion may be substantially the same shape and size as the other corresponding notch portions, but may be irregular as long as alignment is possible.

  Moreover, in this embodiment, although the formation method of each notch side 41-44 was illustrated, as long as the content of the 1st process-3rd process which forms each notch side 41-44 does not deviate from the content of this invention. It can be appropriately changed as necessary. For example, referring to FIG. 5, the first one-side seam allowance 11a and the second one-side seam allowance 12a are provided in a direction intersecting with the corresponding left first seam allowance 21a (a direction where 0 ° <θ0 <180 °). It can also be provided in the orthogonal direction (direction where θ0 = 90 ° in FIG. 5).

  In the present embodiment, the configuration (shape, dimensions, arrangement position, number of skin pieces, etc.) of each skin piece SP1 to SP3 is exemplified, but the configuration of each skin piece is not intended to be limited. For example, the 1st skin piece may be comprised by the 3 or more skin pieces, and the 1st skin piece and the 2nd skin piece may be located in parallel in the order in the order. Further, the second skin piece and the third skin piece can be stitched at an appropriate position of the first skin piece, and may be composed of three or more skin pieces, or a single face material. May be. Further, in the first skin piece, the stitched portion may be provided inclined in an appropriate direction with respect to the corresponding first seam allowance, or may be provided orthogonal to the corresponding first seam allowance. In addition, each skin piece should just be able to comprise the design surface of a vehicle interior goods, and when actually used, it may be arrange | positioned in the position which does not comprise the design surface of a vehicle interior goods.

  Moreover, in this embodiment, although the vehicle seat 2 was illustrated as a vehicle interior goods, it is not the meaning which limits the kind of vehicle interior goods. The vehicle interior article may be any member that is disposed in the vehicle compartment and has a skin, and examples thereof include various members such as a door portion, an instrument panel, a ceiling portion, and a console. Moreover, in the vehicle seat, the configuration of the present embodiment can be applied to seat covers of various seat components such as an armrest, in addition to a seat cushion, a seat back, and a headrest. And according to vehicle interior goods, the structure of an outer skin can be changed suitably, and also the formation position of a suture line and a seam allowance can also be changed suitably. And the structure of this embodiment is applicable to the vehicle interior goods mounted in vehicles, such as a vehicle, an aircraft, and a train.

2 Vehicle seat (vehicle interior product of the present invention)
4 Seat cushion 6 Seat back 8 Headrest 4F Seat frame 4P Seat pad 4a Top plate main portion 4b Top plate side portion 4c Kamachi portion 4S Seat cover (skin of the present invention)
SP1 First skin piece 11 First skin piece 11a First one-side seam allowance 12 Second skin piece 12a Second one-side seam allowance 12E Second skin piece end 14 Suture part E1 Left end of the suture part (the first part of the suture part of the present invention) Tip of one seam allowance side)
E2 Right end of the stitching portion (tip on the first seam allowance side opposite to the stitching portion of the present invention)
21a Left first seam allowance (first seam allowance of the present invention)
21b Right first seam allowance (first seam allowance on the opposite side of the present invention)
SP2 Second skin piece 22 Second seam allowance SP3 Third skin piece 13a Front skin piece 13b Rear skin piece 23 Third seam allowance 30 Left notch portion (notch portion of the present invention)
31 Right notch (notch on the opposite side of the present invention)
32 2nd notch part (other notch part provided in the 2nd sewing allowance of this invention)
33 3rd notch part (other notch part provided in the 3rd seam allowance of the present invention)
41 First notch side 42 Second notch side 43 Third notch side 44 Fourth notch side 51 First notch 52 Second notch 54 Corner part 60a front side 60 Rear side 61 of second one side seam allowance Side CP Contact L1 First suture line L2 Second suture line L3 Third suture line EE1, EE2 Cut edge LM1, LM2 Stitch portion

Claims (4)

A first skin piece and a second skin piece that can form a design surface of a vehicle interior product, and when sewing the first seam allowance of the first skin piece and the second seam allowance of the second skin piece, In the manufacturing method of the skin that sews the first seam allowance and the second seam allowance while aligning the notch part provided for one seam allowance and the other notch part provided for the second seam allowance,
By stitching the first skin piece and the second skin piece to form the first skin piece, the seam allowances of the first skin piece and the second skin piece are overlapped and stitched in a middle surface shape. While providing a stitching portion in a cross shape with respect to the first seam allowance,
The first notch side preliminarily provided in the first skin piece, and the second notch side preliminarily provided in the second skin piece, starting from the tip of the first seam allowance side of the stitching portion, A skin manufacturing method in which the notch portion is formed by expanding and disposing the skirt in a divergent shape toward the edge of the first seam allowance. The first one-side seam allowance of the first skin piece and the second one-side seam allowance of the second skin piece are provided in directions intersecting with the corresponding first seam allowance portions, respectively, and a suture line is formed at each one-side seam allowance. While extending the seam part that becomes the place with the cutting edge in the crossing direction, and sequentially performing the following first step, second step, and third step, it corresponds to the first skin piece and the second skin piece, respectively With a notch side to
In the first step, at the edge of the first seam allowance side of the first one side seam allowance, a polygonal first notch including the first notch side is provided so as to reach the corresponding seam portion, and the first At the edge of the first seam allowance side of the second skin piece adjacent to the two-piece side seam allowance, a polygonal second notch including the second notch side is provided so as to reach the corresponding seam part,
In the second step, a corner portion of the second one-side seam allowance adjacent to the second notch is cut obliquely from a contact point between the second notch side and the seam portion to form a cut-off side. , Forming the end of the second skin piece surrounded by the cut-out side and the cut-off side into an obtuse triangular shape,
In the third step, in a state where the seam allowances of the first skin piece and the second skin piece are overlapped in a middle surface shape, by forming a suture line on the seam portion of the seam allowance of each skin piece, The manufacturing method of the epidermis described in Claim 1 which arrange | positions a suture line so that it may go to the vertex of the edge part of the said 2nd epidermis piece which makes | forms a triangle shape. A third skin piece that can form the design surface of the vehicle interior product is provided, and the first skin piece is provided on the opposite side to the first seam allowance in the extending direction of the stitching portion. Having a seam allowance, and when sewing the first seam allowance on the opposite side of the first skin piece and the third seam allowance on the third skin piece, the notch portion on the opposite side provided in the first seam allowance on the opposite side; While aligning the other notch portion provided in the third seam allowance, the first seam allowance on the opposite side and the third seam allowance are sewn together,
The suturing portion is provided in an intersecting manner with respect to the first seam allowance on the opposite side, and is provided in advance on the first skin piece starting from the tip of the first seam allowance side on the opposite side of the suturing portion. By disposing the third notch side and the fourth notch side provided in advance in the second skin piece so as to expand toward the edge of the first seam allowance on the opposite side. The method for producing an epidermis according to claim 1 or 2, wherein the notch portion on the opposite side is formed. Any one of the said notch part and the said notch part of the said other side, and the other corresponding notch part have comprised the notch-shaped triangular shape which can mutually align a vertex side, respectively. A method for producing the epidermis according to claim 1.

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