JP6878969B2 - Epidermis and method of manufacturing epidermis - Google Patents

Description

The present invention relates to an epidermis in which two types of stitch portions (linear stitches) are formed in a cross shape, and a method for producing an epidermis.

This type of skin is used as a member constituting the design surface of various interior members, and can be suitably used, for example, as a seat cover for a vehicle seat. The epidermis is formed by suturing a plurality of epidermis pieces, and a stitch portion for suturing the seam allowances of adjacent epidermis pieces extends in a predetermined direction. For example, in the vehicle seat disclosed in Patent Document 1, the seat cushion serving as the seat surface is covered with the seat cover as the skin. This seat cover includes a first skin piece forming the front part and a second skin piece forming the rear part, and further has a first stitch portion extending in the front-rear direction of the seat and a second stitch extending in the width direction of the seat. The parts are formed in a cross shape. The first stitch portion is a seam allowance between the seam allowances of the epidermis pieces constituting the first epidermis piece, and extends in the front-rear direction across the first epidermis piece. The second stitch portion is a stitching portion between the seam allowances of the first epidermis piece and the second epidermis piece, and is formed between the first epidermis piece and the second epidermis piece and extends in the left-right direction. By intersecting the second stitch portion with the first stitch portion in this way, the design of the seat cover can be improved. In particular, as a recent sheet design, the momentum for crossing each stitch portion in a cross shape and further intersecting the stitch portions at an acute angle is increasing, and along with this, a highly accurate sewing technique is required.

By the way, when suturing each of the above-mentioned epidermis pieces, the first epidermis piece and the second epidermis piece are overlapped in a middle surface shape, and then the seam allowances formed at the edge ends of both epidermis pieces are sutured at the second stitch portion. .. At this time, in order to form the second stitch portion in a cross shape with the first stitch portion, the seam allowances of both skin pieces are provided so as to intersect the seam allowance of each first skin piece on which the first stitch portion is formed. Then, in the suturing work by the second stitch portion, it is desirable to form the second stitch portion in an appropriate direction, for example, using the first stitch portion as a mark. Therefore, while manually opening the seam allowance portion of the first epidermis piece that intersects the seam allowance of the first epidermis piece, the second stitch portion is formed using the exposed first stitch portion as a mark.

Japanese Patent No. 2016-106710

By the way, in the seat cover of the known technique, a part of the seam allowance of the first skin piece intersects with the seam allowance of the first skin piece which is the formation portion of the second stitch portion. When forming the second stitch portion, it is necessary to open and tilt the seam allowance portion of the first epidermis piece so that the seam allowance portion of the intersecting first epidermis piece does not get in the way. At this time, if the seam allowance portion of the first epidermis piece is insufficiently tilted, a partial thickness difference occurs in the seam allowance of the first epidermis piece (a difference occurs in the total epidermis thickness), resulting in excessive wall thickness. In some cases, the second stitch part was misaligned and the appearance was deteriorated. In addition, a partial difference in thickness may occur in the seam allowance forming a part of the seat cover, which may adversely affect the design and seating property of the seat cover. Further, in the known technique, since the seam allowance portion of the first epidermis piece is manually opened and tilted down, the suturing work is unexpectedly troublesome. That is, the suturing work by the second stitch portion is temporarily stopped before the seam allowance portion of the first epidermis piece to be knocked down. Then, it was necessary to manually knock down the seam allowance of the first epidermis piece and maintain the state in which the seam allowance of the first epidermis piece was knocked down until the second stitch portion got over the seam allowance of the first epidermis piece. The present invention has been devised in view of the above points, and the problem to be solved by the present invention is the formation of the second stitch portion in the configuration in which the first stitch portion and the second stitch portion are formed in an intersecting manner. The purpose is to more reliably prevent an excessively thick portion from being generated in the seam allowance of the epidermis portion, which is a portion.

As a means for solving the above problems, the epidermis of the first invention is composed of a first epidermis piece composed of a pair of first epidermis pieces and a second epidermis composed of a plurality or a single second epidermis piece. It includes a piece, a first stitch portion for sewing the seam allowances of a pair of first skin pieces, and a second stitch portion for sewing the seam allowances of the first skin piece and the second skin piece. The seam allowance of the first skin piece is provided so as to intersect the seam allowance of each first skin piece. In this type of configuration, from the viewpoint of improving the performance of the epidermis (for example, designability and seating property), it is more certain that an excessively thick portion is generated in the seam allowance of the first epidermis piece, which is the formation location of the second stitch portion. It is desirable to be able to prevent it.

Therefore, in the present invention, the seam allowance of the first epidermis piece includes a maintenance portion that maintains the seam allowance of each first epidermis piece that intersects with the seam allowance of the first epidermis piece in an inverted state, and each first epidermis piece. There is a second stitch portion that crosses the seam allowance portion of the. In the present invention, it is possible to more reliably prevent an excessively thick portion from being generated in the seam allowance which is the formation portion of the second stitch portion in the maintenance portion, and the configuration contributes to the improvement of the performance of the epidermis.

The epidermis of the second invention is maintained in the epidermis of the first invention in a state in which the seam allowance portions of the first epidermis pieces are tilted apart from each other by the maintenance portion. In the present invention, since the seam allowances of the first skin pieces are tilted apart from each other by the maintenance portion, the second stitch portion is formed as compared with the case where these seam allowances are tilted in the same direction. The structure is such that an excessively thick portion is unlikely to occur in the seam allowance. Further, by tilting the seam allowance portion of each first skin piece in a direction away from each other to expose the first stitch portion, the second stitch portion can be formed more appropriately using this first stitch portion as a mark. The composition further contributes to improving the design of the epidermis.

The epidermis of the third invention is composed of a sewing thread in which the maintenance portion of the epidermis of the first invention or the second invention sews the seam allowance portion of each of the first epidermis pieces in a tilted state to the corresponding epidermis pieces. There is. In the present invention, the sewing thread can form a relatively simple and flexible maintenance portion.

The epidermis of the fourth invention is the epidermis of any of the first to third inventions, in which the second epidermis piece composed of a pair of second epidermis pieces and the seam allowance of the pair of second epidermis pieces are sewn together. It is provided with the other first stitch portion, and the seam allowance of the second skin piece is provided so as to intersect the seam allowance of each second skin piece. Then, the second stitch portion intersects the boundary between the first stitch portion and the other first stitch portion, and the seam allowance of each second epidermis piece intersecting with the seam allowance of the second epidermis piece on the second epidermis piece. Another maintenance portion that maintains the portion in a tilted state and a second stitch portion that crosses the seam allowance portion of each second skin piece are provided. In the present invention, the design of the epidermis is further improved by crossing the second stitch portion at the boundary between the first stitch portion and the other first stitch portion and forming a pattern such as a cross shape by each of these stitch portions. Can be made to. Then, by tilting the seam allowances of both the first epidermis piece and the second epidermis piece at the corresponding maintenance portions, it is possible to more reliably prevent an excessively thick portion from being generated in the seam allowance where the second stitch portion is formed. can do.

In the epidermis of the fifth invention, at least one of the first stitch portion and the other first stitch portion intersects the second stitch portion at an acute angle in the surface direction of the epidermis in the epidermis of the fourth invention. In the present invention, the design of the epidermis can be further improved by sharply intersecting at least one of the first stitch portion and the other first stitch portion with the second stitch portion.

In the epidermis of the sixth invention, in any of the epidermis of the first invention to the fifth invention, the seam allowance of the first epidermis piece arranged on the back side of the epidermis in a state where the epidermis covers the surface of the base material is the seam allowance. It is housed in a recess provided on the surface of the base material together with the seam allowance portion of each first skin piece that intersects the seam allowance of the skin piece. In the present invention, while covering the base material with the skin, the seam allowance to be arranged on the back side of the skin is accommodated in the recess of the base material. At this time, the seam allowance, which is the formation portion of the second stitch portion, is set so that an excessively thick portion is not generated as much as possible in the maintenance portion, so that the seam allowance can be well accommodated in the recess of the base material.

In the epidermis of the seventh invention, in any of the epidermis of the first to sixth inventions, the arrangement portion of the maintenance portion is set within the range from the arrangement portion of the second stitch portion to the end of the seam allowance of the first epidermis piece. Has been done. In the present invention, by providing the seam allowance portion which is closed by the second stitch portion and is hard to be exposed to the outside, it is possible to avoid deterioration of the design of the epidermis due to the external exposure of the maintenance portion as much as possible.

In the method for producing an epidermis of the eighth invention, the epidermis is a first epidermis piece formed by sewing the seam allowances of a pair of first epidermis pieces to each other at a first stitch portion, and a plurality or a single second epidermis piece. It has a second epidermis piece formed of. Then, the seam allowance of the first epidermis piece with respect to the second epidermis piece is provided so as to intersect the seam allowance of each first epidermis piece, and the seam allowances of the first epidermis piece and the second epidermis piece are sewn together at the second stitch portion. In this type of configuration, it is desirable that, for example, it is possible to more reliably prevent an excessively thick portion from being generated in the seam allowance of the first skin piece, which is the formation portion of the second stitch portion, without exerting as much manual labor as possible.

Therefore, in the present invention, the seam allowance of the first skin piece is formed with a maintenance portion for maintaining at least one seam allowance of each first skin piece intersecting with the seam allowance of the first skin piece in an inverted state. It was decided to form the two stitch portions across the seam allowance portion of each first epidermis piece. In the present invention, prior to the formation of the second stitch portion, the seam allowance of at least one of the pair of first skin pieces is maintained in an inverted state by the maintenance portion. In this way, the maintenance portion is suitable for the second stitch portion by more reliably preventing an excessively thick portion from being generated in the seam allowance, which is the formation portion of the second stitch portion, without exerting as much manual labor as possible. Can be formed into.

In the method for producing the epidermis of the ninth invention, in the method for producing the epidermis of the eighth invention, the maintenance portion comprises sewing threads in which the seam allowance portion of each of the first epidermis pieces in a laid-down state is sewn to the corresponding epidermis pieces. Has been done. In the present invention, the maintenance portion can be configured with a relatively simple structure of sewing thread.

In the method for producing the epidermis of the tenth invention, in the method for producing the epidermis of the eighth invention or the ninth invention, the second stitch portion is formed from one of the pair of first epidermis pieces toward the other, and the maintenance portion. Is provided in one of the seam allowances of each first skin piece. In the present invention, the second stitch portion can be formed relatively smoothly by providing the seam allowance of one of the first epidermis pieces to be sewn first at the second stitch portion.

The method for producing the epidermis of the eleventh invention is the method for producing the epidermis of the ninth invention, wherein the maintenance portion is provided across the seam allowance portion of each first epidermis piece in the extending direction of the second stitch portion. It is a stitch. In the present invention, by providing the maintenance portion across the seam allowance portion of each first skin piece, it is possible to more reliably prevent an excessively thick portion from being generated in the seam allowance which is the formation portion of the second stitch portion. it can.

According to the first invention according to the present invention, in the configuration in which the first stitch portion and the second stitch portion are formed in an intersecting manner, an excessively thick portion is generated in the seam allowance of the skin portion which is the formation portion of the second stitch portion. That can be prevented more reliably. Further, according to the second invention, it is possible to make a configuration in which an excessively thick portion is unlikely to occur in the seam allowance of the skin portion which is the formation portion of the second stitch portion. Further, according to the third invention, it is possible to more reliably prevent an excessively thick portion from being generated in the seam allowance of the skin portion which is the formation portion of the second stitch portion by the relatively simple structure. Further, according to the fourth invention, it is possible to more reliably prevent an excessively thick portion from being generated in the seam allowance of the epidermis portion which is the formation portion of the second stitch portion. Further, according to the fifth invention, the first stitch portion and the second stitch portion can be formed in a more attractively crossed shape. Further, according to the sixth invention, from the viewpoint of covering the base material with the skin with good finish, it is more reliable to prevent an excessively thick portion from being generated in the seam allowance of the skin portion which is the formation portion of the second stitch portion. Can be done. According to the seventh invention, it is possible to more reliably prevent an excessively thick portion from being generated in the seam allowance of the epidermis portion, which is the formation portion of the second stitch portion, while improving the design of the epidermis. Further, according to the eighth invention, in the configuration in which the first stitch portion and the second stitch portion are formed in a cross shape, an excessively thick portion is generated in the seam allowance of the skin portion which is the formation portion of the second stitch portion. It can be reliably stopped. Further, according to the ninth invention, it is possible to more reliably prevent an excessively thick portion from being generated in the seam allowance of the skin portion which is the formation portion of the second stitch portion by the relatively simple structure. Further, according to the tenth invention, from the viewpoint of smoothly forming the second stitch portion, it is possible to more reliably prevent an excessively thick portion from being generated in the seam allowance of the skin portion which is the formation portion of the second stitch portion. it can. Further, according to the eleventh invention, it is possible to more reliably prevent an excessively thick portion from being generated in the seam allowance of the epidermis portion which is the formation portion of the second stitch portion.

It is a perspective view of a vehicle seat. It is an enlarged front view of the seat cover portion circled by II of FIG. It is a perspective view of a seat pad. It is a perspective view which looked at the 1st skin piece from the back side. It is a schematic back view of the first skin piece. It is a perspective view which looked at the 2nd skin piece from the front side. It is a perspective view of the 1st skin piece and the 2nd skin piece at the time of forming the 2nd stitch part. It is a perspective view which looked at the seat cover part shown in FIG. 2 from the back side.

Hereinafter, embodiments for carrying out the present invention will be described with reference to FIGS. 1 to 8. 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. Further, in FIGS. 4 to 6 and 8, an arrow line indicating the direction of the seat cover is shown with reference to the seat cover arranged on the vehicle seat. The vehicle seat 2 of FIG. 1 has a seat cushion 4, a seat back 6, and a headrest 8. These seat constituent members (4, 6, 8) cover the seat frame (4F, 6F, 8F) forming the seat skeleton, the seat pad (4P, 6P, 8P) forming the outer shape of the seat, and the seat pad, respectively. It has a seat cover (4S, 6S, 8S). A lower portion of the seat back 6 (described in detail later) is foldably connected to the rear portion of the seat cushion 4, and a headrest 8 is arranged above the seat back 6 in the upright state.

[Seat back]
The seat back 6 is formed by arranging a seat pad 6P (detailed later) on a seat frame 6F (not shown) and then covering it with a seat cover 6S (detailed later) with reference to FIGS. 1 to 3. .. Here, the seat frame 6F is typically an arch-shaped frame body, and can be formed of a material having excellent rigidity such as metal or hard resin. The seat pad 6P is a member corresponding to the base material of the present invention, and the seat cover 6S is a face material corresponding to the skin of the present invention. The seat cover 6S has a plurality of skin pieces SP1 to SP3 and the like, which will be described later, and a plurality of stitch portions ST1a to ST1c, ST2a, ST2b with reference to FIG. 1 (Note that in FIGS. 1 and 2). , Not each stitch portion itself, but a joint portion of the skin piece on which each stitch portion is formed is marked with a reference numeral indicating each stitch portion).

In this embodiment, with reference to FIG. 2, some stitch portions (for example, ST1a and ST1b and ST2a) are formed in a cross shape from the viewpoint of improving the design of the seat cover 6S. At the intersection of these stitch portions, as shown in FIG. 8, a plurality of seam allowances SM1 to SM6 (details will be described later) corresponding to the stitch portions are arranged intersecting each other. In this type of configuration, from the viewpoint of improving the performance of the seat cover 6S or simplifying the stitching work, an excessively thick portion is used for the seam allowance (SM5, SM6) of the seat cover portion that is the forming portion of the second stitch portion ST2a and the like. Should be taken into consideration so that Therefore, in this embodiment, in the configuration described later, it is possible to more reliably prevent an excessively thick portion from being generated in the seam allowance (SM5, SM6) of the seat cover portion that is the formation portion of the second stitch portion ST2a and the like. did. Hereinafter, each configuration will be described in detail.

[Seat pad (base material)]
The seat pad 6P is a member having a substantially rectangular shape in a front view capable of elastically supporting an occupant with reference to FIG. 3, and has a plurality of recesses 10, 12, and 14 described later. Here, the material of the seat pad is not particularly limited, and for example, a foamed resin such as ^{polyurethane foam (density: 10 kg / m 3 to} 60 kg / m ^{3) can be exemplified.} The front surface and the side surface of the seat pad 6P, which are the design surfaces, correspond to the surface of the base material of the present invention and are covered with the seat cover 6S of FIG. 1, which will be described later. The design surface of the seat pad 6P can be divided into a top plate main portion 6a, a pair of left and right top plate side portions 6b, and a pair of left and right gusset portions 6c with reference to FIG. The top plate main portion 6a is a substantially flat portion formed in the center in the left-right direction, which is the seat width direction, and has a width dimension that allows the occupant to sit and extends in the vertical direction. Further, each top plate side portion 6b is a portion that protrudes relatively to the front side on the left side and the right side of the top plate main portion 6a, and can support the side of the occupant during cornering traveling or the like. Each of the gusset portions 6c is a portion forming the left and right side surfaces of the seat back 6 in the seat width direction.

[Recess]
The plurality of recesses (horizontal recess 10, left vertical recess 12, right vertical recess 14) are portions corresponding to the recesses of the present invention, respectively, with reference to FIG. 3, and are provided at appropriate positions on the design surface of the seat pad 6P. ing. The lateral recess 10 is a recess extending in the left-right direction, and includes a first lateral recess 10a formed in the top plate main portion 6a and a second lateral recess 10b formed in the left top plate side portion 6b. It has a third lateral recess 10c formed in the side portion 6b of the top plate on the right side. The first lateral recess 10a extends substantially linearly in the left-right direction, the second lateral recess 10b gradually curves upward toward the left side, and the third lateral recess 10c gradually extends toward the right. It curves upward and extends. Further, the left vertical recess 12 and the right vertical recess 14 are recesses extending in the vertical direction, respectively, and are arranged separately on the left and right sides of the seat back 6. The left vertical recess 12 is a recess extending vertically between the top plate main portion 6a and the left top plate side portion 6b, and the right vertical recess 14 is a top plate main portion 6a and the right top plate side portion 6b. It is a recess extending up and down between the two. The left vertical recess 12 and the right vertical recess 14 intersect at appropriate positions of the horizontal recess 10 at right angles, and are connected to each other at the intersection with the horizontal recess 10. As will be described later, each of the recesses 10, 12, and 14 can accommodate any of the seam allowances of the skin pieces SP1 to SP3 shown in FIG.

[Seat cover (skin)]
The seat cover 6S has a plurality of skin pieces (first skin piece SP1, left side second skin piece SP2, right side second skin piece SP3, etc.) and a plurality of stitch portions ST1a, ST1b, which will be described later, with reference to FIG. It has ST1c, ST2a, and ST2b (in FIG. 1, for convenience, a specific reference numeral is attached to a specific skin piece, and a common reference numeral SP is attached to the other skin pieces). Here, as the material of each skin piece SP1 to SP3, a cloth (woven fabric, knitted fabric, non-woven fabric) or leather (natural leather, synthetic leather) made of natural fiber or synthetic fiber can be exemplified. The first epidermis piece SP1 is an epidermis piece that covers the top plate main portion 6a, and is composed of a pair of first epidermis pieces (upper first epidermis piece 21a, lower first epidermis piece 21b). The upper first epidermis piece 21a is a first epidermis piece portion that covers the upper part of the top plate main portion 6a with the lateral recess 10 shown in FIG. 3 as a boundary, and the lower first epidermis piece 21b is the top plate main portion. It is the first epidermis piece portion that covers the lower part of 6a.

The left second skin piece SP2 and the right second skin piece SP3 correspond to the second skin piece of the present invention, respectively, and are arranged symmetrically with the first skin piece SP1 as shown in FIG. The left second skin piece SP2 is a skin piece that covers the left top plate side portion 6b, and the right second skin piece SP3 is a skin piece that covers the right top plate side portion 6b. These two second epidermis pieces SP2 and SP3 have substantially the same basic configuration except that they are arranged symmetrically. For example, the left second epidermis piece SP2 is a pair of second epidermis pieces (upper left second). It is composed of an epidermis piece 22a and a second epidermis piece 22b on the lower left side). The upper left second epidermis piece 22a is a second epidermis piece portion that covers the upper part of the left top plate side portion 6b with the lateral recess 10 shown in FIG. 3 as a boundary, and the lower left second epidermis piece 22b is the left side. It is a second skin piece portion that covers the lower part of the top plate side portion 6b. The right second epidermis piece SP3 is also composed of the upper right second epidermis piece 23a and the lower right second epidermis piece 23b, similarly to the left second epidermis piece SP2.

[First stitch part]
A plurality of first stitch portions ST1a, ST1b, ST1c and a pair of second stitch portions ST2a, ST2b are formed on the seat cover 6S with reference to FIG. The plurality of first stitch portions (center first stitch portion ST1a, left first stitch portion ST1b, right first stitch portion ST1c) are stitching points between the corresponding skin pieces, and are left and right in the front surface of the seat cover 6S. It is generally made up of one piece. The central first stitch portion ST1a is a portion corresponding to the first stitch portion of the present invention, and is formed so as to cross the first skin piece SP1 substantially linearly to the left and right. The central first stitch portion ST1a stitches the seam allowances (SM1 and SM2) of the first skin pieces 21a and 21b forming the first skin piece SP1 with reference to FIGS. 4 and 5 (each seam allowance). Details will be described later).

The left first stitch portion ST1b and the right first stitch portion ST1c are portions corresponding to the other first stitch portions of the present invention, respectively, and are arranged symmetrically on the front surface of the seat cover 6S. The left first stitch portion ST1b is formed so as to cross the left left second skin piece SP2 to the left and right, and is gradually curved upward as it goes to the left. The left side first stitch portion ST1b stitches the seam allowances (SM3, SM4) of the second skin pieces 22a and 22b forming the left side second skin piece SP2 with reference to FIG. 6 (details of each seam allowance). Will be described later). Further, the right side first stitch portion ST1c is formed so as to cross the right side second skin piece SP3 to the left and right with reference to FIG. 1, and is gradually curved upward as it goes to the right. The right side first stitch portion ST1c stitches the seam allowances (not shown) of the second skin pieces 23a and 23b forming the right side second skin piece SP3.

[Second stitch part]
Further, the pair of second stitch portions (left side second stitch portion ST2a, right side second stitch portion ST2b) are stitching points between the corresponding skin pieces, and are formed separately on the left and right on the front surface of the seat cover 6S, respectively. .. The left second stitch portion ST2a is a stitch portion extending vertically and vertically between the top plate main portion 6a and the left top plate side portion 6b. The left side second stitch portion ST2a sews the seam allowances (SM5 and SM6) of the first skin piece SP1 and the left side second skin piece SP2 with reference to FIG. 7 (details of each seam allowance will be described later). The right second stitch portion ST2b is a stitch portion extending vertically and vertically between the top plate main portion 6a and the right top plate side portion 6b. The right second stitch portion ST2b sutures the seam allowances (not shown) of the first skin piece SP1 and the right second skin piece SP3.

[Arrangement relationship between the first stitch part and the second stitch part]
The left second stitch portion ST2a and the right second stitch portion ST2b are arranged so as to intersect with each other at appropriate positions of the first stitch portions ST1a to ST1c with reference to FIG. That is, the left side second stitch portion ST2a intersects the center first stitch portion ST1a and the left side first stitch portion ST1b (generally one stitched first stitch portion) with reference to FIG. The seat cover 6S is configured to contribute to the improvement of the design of the seat cover 6S by forming a substantially cross-shaped pattern by the stitch portions ST1a, ST1b, and ST2a. Further, the left side second stitch portion ST2a and the left side first stitch portion ST1b intersect sharply at an angle θ1 (θ1 <90 °) on the upper side, further improving the design of the seat cover 6S. Further, the left second stitch portion ST2a and the center first stitch portion ST1a also intersect sharply at an angle θ2 (θ2 <90 °) on the lower side, further improving the design of the seat cover 6S. Further, the right second stitch portion ST2b also intersects the center first stitch portion ST1a and the right side first stitch portion ST1c at the boundary as shown in FIG. A substantially cross-shaped pattern is also formed by each of these stitch portions ST1a, ST1c, and ST2b.

[Manufacturing method of seat cover]
With reference to FIG. 1, a plurality of skin pieces SP1 to SP3 and the like are sewn together to manufacture a seat cover 6S. Here, since the suturing methods of the epidermis pieces SP1 to SP3 are almost the same, the suturing method will be described below by taking the first epidermis piece SP1 and the left second epidermis piece SP2 as an example. Then, in the first skin piece SP1, the central first stitch portion ST1a extends in the left-right direction with reference to FIGS. 4 and 5. The central first stitch portion ST1a has a first seam allowance SM1 formed at the lower edge end of the upper first skin piece 21a and a second seam allowance SM2 formed at the upper edge end of the lower first skin piece 21b. It is sutured. The first seam allowance SM1 and the second seam allowance SM2 extend in the left-right direction so as to be able to face each other in a middle surface shape, and substantially the entire width thereof is sewn at the central first stitch portion ST1a.

Further, in the left side second skin piece SP2, the left side first stitch portion ST1b extends in the left-right direction with reference to FIG. The left first stitch portion ST1b includes a third seam allowance SM3 formed at the lower edge end of the upper left second skin piece 22a and a fourth seam allowance SM4 formed at the upper edge end of the lower left second skin piece 22b. Is sutured. The third seam allowance SM3 and the fourth seam allowance SM4 extend in the left-right direction so as to be able to face each other in a middle surface shape, and their substantially overall widths are sewn by the left first stitch portion ST1b.

[Method of forming the second stitch]
Next, the left second stitch portion ST2a is provided so as to intersect the central first stitch portion ST1a and the left first stitch portion ST1b. That is, with reference to FIG. 7, the fifth seam allowance SM5 formed at the left edge of the first skin piece SP1 and the sixth seam allowance SM6 formed at the right edge of the left second skin piece SP2 are shown on the left second. Suture at the stitch portion ST2a. At this time, both skin pieces SP1 and SP2 are overlapped in a middle surface shape, and the left end of the central first stitch portion ST1a and the right end of the left first stitch portion ST1b are aligned and aligned. In this embodiment, the fifth seam allowance SM5 of the first skin piece SP1 shown in FIG. 4 is provided so as to intersect the seam allowances SM1 and SM2 of the first skin pieces 21a and 21b. Similarly, the sixth seam allowance SM6 of the left second skin piece SP2 shown in FIG. 6 is provided so as to intersect the seam allowances SM3 and SM4 of the second skin pieces 22a and 22b.

Thus, in this embodiment, the seam allowance SM5 (SM6), which is the formation portion of the left second stitch portion ST2a, is provided so as to intersect the seam allowances SM1 and SM2 (SM3, SM4) of the corresponding skin pieces. Since it is necessary to properly form the left second stitch portion ST2a, it is avoided as much as possible that the seam allowances SM5 and SM6 of each skin piece become excessively thick at the seam allowances SM1 to SM4 of each skin piece intersecting them. Should. In this type of configuration, it is desirable to be able to more reliably prevent the occurrence of an excessively thick portion in the seam allowances SM5 and SM6, which are the formation points of the left second stitch portion ST2a, for example, without exerting manual labor as much as possible. ..

Therefore, in this embodiment, at least one seam allowance SM1 and SM2 of each of the first seam allowances 21a and 21b intersecting the same seam allowance SM5 is tilted to the fifth seam allowance SM5 of the first skin piece SP1 shown in FIG. A maintenance unit 40 (described in detail later) for maintaining the state is formed. Similarly, in a state where at least one seam allowance SM3 and SM4 of each of the second seam allowances 22a and 22b intersecting the same seam allowance SM6 is tilted to the sixth seam allowance SM6 of the left side second skin piece SP2 shown in FIG. It forms another maintenance section 42 (described in detail later) to be maintained. After the seam allowance portions SM1 to SM4 intersecting in this way are tilted in appropriate directions by the corresponding maintenance portions 40 and 42, the left second stitch portion ST2a shown in FIG. 7 is crossed the seam allowance portions SM1 to SM4. I decided to form it.

[Maintenance section]
That is, with reference to FIGS. 4 and 5, the left end portions of the seam allowances SM1 and SM2 of the first skin pieces 21a and 21b are arranged so as to intersect with each other in the fifth seam allowance SM5 of the first skin piece SP1. ing. Therefore, the left end portions of the seam allowances SM1 and SM2 of the first skin pieces 21a and 21b are tilted so as to be separated from each other. At this time, it is desirable to expose the formed portion of the central first stitch portion ST1a arranged between the two seam allowances SM1 and SM2. In this state, stitches of the sewing thread Y1 are formed so as to vertically cross the seam allowances SM1 and SM2 of the first skin pieces 21a and 21b, and the stitches of the sewing thread Y1 are used as the maintenance portion 40. By sewing the first seam allowance SM1 to the back surface of the upper first skin piece 21a with the sewing thread Y1 which is the maintenance portion 40 in this way, the collapsed state of the first seam allowance SM1 can be suitably maintained. Similarly, by sewing the second seam allowance SM2 to the back surface of the lower first skin piece 21b with the sewing thread Y1 which is the maintenance portion 40, the collapsed state of the second seam allowance SM2 can be suitably maintained. .. Since the seam allowances SM1 and SM2 of the first skin pieces 21a and 21b are tilted in directions away from each other, the fifth of the first skin pieces SP1 is compared with the case where the seam allowances SM1 and SM2 are tilted in the same direction. The seam allowance SM5 is configured so that an excessively thick portion is unlikely to occur. The maintenance portion 40 by the sewing thread Y1 can be formed by a sewing machine (not shown) for forming the left second stitch portion ST2a. When the maintenance portion 40 is formed by a sewing machine, the stitch is formed by entwining the sewing thread Y1 as the needle thread with the bobbin thread (not shown). By forming the maintenance portion 40 with the sewing thread Y1 in this way, the formation work of the maintenance portion 40 and the sewing work by the left second stitch portion ST2a can be performed in a series of operations, and the manufacturing process of the seat cover 6S is as simple as possible. Can be changed.

Further, in this embodiment, the left second stitch portion ST2a is formed in the order of the upper first epidermis piece 21a and the lower first epidermis piece 21b. That is, the upper first epidermis piece 21a corresponds to one of the pair of first epidermis pieces of the present invention. Therefore, by providing the seam allowance SM1 of the upper first skin piece 21a with the maintenance portion 40, the left second stitch portion ST2a can be formed while smoothly overcoming the upper first skin piece 21a in the collapsed state. .. Further, by providing the maintenance portion 40 so as to vertically cross the seam allowances SM1 and SM2 of the first skin pieces 21a and 21b, an excessively thick portion is generated in the seam allowance SM5 which is the formation portion of the left second stitch portion ST2a. This can be prevented even more reliably.

Here, the forming position of the maintenance portion 40 is not particularly limited as long as the seam allowance portions SM1 and SM2 can be appropriately tilted. For example, referring to FIG. 5, from the viewpoint of improving the design of the seat cover 6S, the maintenance portion 40 can be formed within the range AR from the formation position of the left second stitch portion ST2a to the end E of the fifth seam allowance SM5. That is, with reference to FIG. 8, when the seat cover 6S is covered, the first skin piece SP1 and the left second skin piece SP2 are in a state of being developed in a plane shape with the left second stitch portion ST2a as a base point. In this unfolded state, the portion of the range AR of the fifth seam allowance SM5 is arranged on the back side of the seat cover 6S in a state of being closed by the left second stitch portion ST2a. Therefore, by forming the maintenance portion 40 within the range AR of the fifth seam allowance SM5 shown in FIG. 5, it is possible to prevent the maintenance portion 40 from being exposed to the outside from the seat cover 6S at the time of coating as much as possible. ..

[Other maintenance departments]
Further, the other maintenance portion 42 shown in FIG. 6 can also be formed on the left second skin piece SP2 by the same method as the maintenance portion 40 shown in FIG. That is, in the sixth seam allowance SM6 of the left second skin piece SP2, the right end portions of the seam allowances SM3 and SM4 of the second skin pieces 22a and 22b are arranged so as to intersect each other. Therefore, the right end portions of the seam allowances SM3 and SM4 of the second skin pieces 22a and 22b are tilted away from each other, and the formed portion of the left first stitch portion ST1b arranged between the two seam allowances SM3 and SM4 is exposed. Keep it. In this state, stitches of the other sewing thread Y2 are formed so as to vertically cross the seam allowances SM3 and SM4 of the second skin pieces 22a and 22b, and the stitches of the other sewing thread Y2 are used as the other maintenance portion 42. In this way, both seam allowances SM3 and SM4 are sewn on the back surfaces of the corresponding second skin pieces 22a and 22b with the sewing thread Y2 which is the other maintenance portion 42, so that the collapsed state of these seam allowances SM3 and SM4 is suitably maintained. be able to.

Then, as shown in FIG. 7, the first skin piece SP1 and the left second skin piece SP2 are sutured at the left second stitch portion ST2a. At this time, the fifth seam allowance SM5 of the first skin piece SP1 and the sixth seam allowance SM6 of the left second skin piece SP2 are in a state in which an excessively thick portion is hardly generated by the corresponding maintenance portions 40 and 42. Therefore, it is not necessary to stop the suturing work by the left second stitch portion ST2a before the seam allowances SM1 and SM2 of the first skin pieces 21a and 21b, and the seam allowances SM1 and SM2 of the first skin pieces 21a and 21b are manually operated. There is no need to defeat it. Therefore, according to this embodiment, the left side second stitch portion ST2a is formed on the seam allowance portion SM5 or the like of the first skin piece SP1 which is the formation portion of the left side second stitch portion ST2a without exerting as much manual labor as possible. can do. Further, in the seam allowance SM5 of the first skin piece SP1, the formed portion of the central first stitch portion ST1a is exposed between the seam allowances SM1 and SM2 of the first skin pieces 21a and 21b. Therefore, using the central first stitch portion ST1a as a mark, the left second stitch portion ST2a can be formed in an appropriate intersecting state with respect to the central first stitch portion ST1a.

[Seat cover covering work]
While covering the seat pad 6P with the seat cover 6S as shown in FIG. 1, each seam allowance of the seat cover 6S is housed in the corresponding recesses 10, 12, and 14 of the seat pad 6P shown in FIG. For example, the first skin piece SP1 and the second skin piece SP2 will be described as an example. Both skin pieces SP1 and SP2 cover the top plate main portion 6a and the left side top plate side portion 6b of the seat pad 6P shown in FIG. ing. In this covered state, as shown in FIG. 8, the first skin piece SP1 and the left second skin piece SP2 are developed in a plane shape with the left second stitch portion ST2a as a base point. Further, in this unfolded state, the fifth seam allowance SM5 and the sixth seam allowance SM6 of both skin pieces SP1 and SP2 protrude from the back side of the skin piece portion that is unfolded in a planar shape. Therefore, by storing the fifth seam allowance SM5 and the sixth seam allowance SM6 in the left vertical recess 12 shown in FIG. 3, the seat cover 6S is partially convex due to the fifth seam allowance SM5 and the sixth seam allowance SM6. It can be avoided. At this time, the fifth seam allowance SM5 and the sixth seam allowance SM6 can be well accommodated in the left vertical recess 12 by keeping the corresponding maintenance portions 40 and 42 in a state where an excessively thick portion is not generated as much as possible. it can. By appropriately accommodating the fifth seam allowance SM5 and the sixth seam allowance SM6 in the left vertical recess 12 shown in FIG. 3, the seat pad 6P can be covered with the neatly developed seat cover 6S, and the seat cover 6S can be covered. The configuration contributes to improving the finish.

In this way, as shown in FIG. 1, the design surface of the seat is formed by the seat cover 6S, and the formed portions of the stitch portions ST1a to ST1c, ST2a, and ST2b appear linearly on the design surface. Then, in this embodiment, the design of the seat cover 6S can be improved by appropriately forming the second stitch portions ST2a and ST2b and intersecting the corresponding first stitch portions ST1a to ST1c. For example, as shown in FIG. 2, the left second stitch portion ST2a intersects the boundary between the central first stitch portion ST1a and the left first stitch portion ST1b. A cross-shaped pattern is formed by each of the stitch portions ST1a, ST1b, and ST2a, and the design of the seat cover 6S is suitably improved. Further, the left second stitch portion ST2a sharply intersects the central first stitch portion ST1a and the left first stitch portion ST1b, further improving the design of the seat cover 6S. Further, in this embodiment, with reference to FIG. 8, the maintenance portion 40 and the other maintenance portion 42 are arranged in the range AR portion of the corresponding seam allowances SM5 and SM6 closed by the left second stitch portion ST2a. There is. Therefore, it is possible to avoid exposing the maintenance portion 40 and the other maintenance portion 42 to the outside from the seat cover 6S at the time of coating as much as possible. At this time, since each of the maintenance portions 40 and 42 is composed of the relatively flexible sewing threads Y1 and Y2, the generation of a foreign body sensation caused by the respective maintenance portions 40 and 42 (particularly hardness) is preferably avoided. The structure contributes to improving the seating comfort of the seat cover 6S.

As described above, in the present embodiment, it is possible to more reliably prevent the maintenance portion 40 from having an excessively thick portion in the seam allowance SM5 or the like, which is the formation portion of the second stitch portion ST2a or the like, and the seat cover. The configuration contributes to improving the performance of the 6S. At this time, since the seam allowance portions (SM1, SM2) of the first skin pieces 21a and 21b are tilted away from each other by the maintenance portion 40, the seam allowance portions (SM1, SM2) are tilted in the same direction as compared with the case where they are tilted in the same direction. As a result, an excessively thick portion is unlikely to occur in the seam allowance SM5 or the like, which is the formation portion of the second stitch portion ST2a or the like. Further, the seam allowance portions (SM1 and SM2) of the first skin pieces 21a and 21b are tilted away from each other to expose the first stitch portion ST1a and the like. Since the second stitch portion ST2a and the like can be formed more appropriately using the first stitch portion ST1a and the like as a mark, the structure further contributes to the improvement of the design of the seat cover 6S. Further, a relatively simple and flexible maintenance portion 40 can be formed by sewing thread Y1 or the like.

Further, the seat cover 6S is formed by crossing the second stitch portion ST2a or the like at the boundary between the first stitch portion ST1a or the like and the other first stitch portion ST1b or the like and forming a cross-shaped pattern or the like by each of these stitch portions. The design can be further improved. Then, the seam allowances (SM1 to SM4) of both the first epidermis pieces 21a and 21b and the second epidermis pieces 22a and 22b are tilted by the corresponding maintenance portions 40 and 42, respectively, to form the second stitch portion ST2a and the like. It is possible to more reliably prevent an excessively thick portion from being generated in the seam allowances SM5 and SM6. Further, by sharply intersecting at least one of the first stitch portion ST1a and the like and the other first stitch portion ST1b and the like with the second stitch portion ST2a and the like, the design of the seat cover 6S can be further improved. .. Further, while covering the seat pad 6P with the seat cover 6S, the seam allowances SM5, SM6 and the like arranged on the back side of the seat cover 6S are housed in the recess 12 and the like of the seat pad 6P. At this time, the seam allowance SM5 or the like, which is the formation portion of the second stitch portion ST2a or the like, is accommodated in the recess 12 or the like of the seat pad 6P by keeping the maintenance portion 40 from forming an excessively thick portion as much as possible. Can be kept. By providing the maintenance portion 40 in the seam allowance portion (the portion with the reference numeral AR) that is closed by the second stitch portion ST2a or the like and is difficult to be exposed to the outside, the design of the seat cover 6S due to the external exposure of the maintenance portion 40 is achieved. Can be avoided as much as possible. Therefore, according to the seat cover 6S (skin) according to the present embodiment, the second stitch portions ST2a and ST2b are formed in the configuration in which the first stitch portions ST1a to ST1c and the second stitch portions ST2a and ST2b are formed in an intersecting manner. It is possible to more reliably prevent an excessively thick portion from being generated in the seam allowance SM5 or the like of the epidermis portion which is a portion.

Further, in the present embodiment, prior to the formation of the second stitch portion ST2a and the like, the seam allowance (for example, SM1 or SM2) of at least one of the pair of first skin pieces is maintained in a tilted state by the maintenance portion 40. In this way, the maintenance portion 40 more reliably prevents an excessively thick portion from being generated in the seam allowance SM5 or the like, which is the formation portion of the second stitch portion ST2a or the like, without exerting as much manual labor as possible. The two-stitch portion ST2a and the like can be appropriately formed. Further, the maintenance portion 40 can be configured with a relatively simple structure such as sewing thread Y1. Further, by providing the maintenance portion 40 in the seam allowance (for example, SM1) of one of the first epidermis pieces to be sewn first by the second stitch portion ST2a or the like, the second stitch portion ST2a or the like can be formed relatively smoothly. it can. Further, by providing the maintenance portion 40 across the seam allowance portions (SM1, SM2) of the first skin pieces 21a and 21b, an excessively thick portion is generated in the seam allowance SM5 or the like which is the formation portion of the second stitch portion ST2a or the like. This can be prevented even more reliably. Therefore, according to the method for manufacturing the seat cover 6S (skin) according to the present embodiment, in the configuration in which the first stitch portions ST1a to ST1c and the second stitch portions ST2a and ST2b are formed in an intersecting manner, the second stitch portions ST2a, It is possible to more reliably prevent an excessively thick portion from being generated in the seam allowance SM5 or the like of the epidermis portion where ST2b is formed.

The epidermis of the present embodiment and the method for producing the epidermis are not limited to the above-described embodiment, and various other embodiments may be adopted. In the present embodiment, the configurations (shape, dimensions, formation positions, number of formations, constituent members, etc.) of the maintenance portions 40 and 42 are illustrated, but the configuration of each maintenance portion is not limited. For example, the seam allowance portion of each first skin piece may be maintained in a state of being tilted in the same direction by the maintenance portion. Further, the maintenance portion is formed in an appropriate direction such as the extending direction of the second stitch portion (vertical direction in this embodiment) and the extending direction of the first stitch portion (horizontal direction in this embodiment) in the corresponding seam allowance. The maintenance portion can be formed independently of the formation portion of the second stitch portion (provided independently of the range of AR in FIG. 5). Further, by the maintenance portion, only the peripheral edge of the seam allowance portion of each first epidermis piece can be fixed to the corresponding epidermis piece. Further, the maintenance portion can be formed on at least one of a pair of first epidermis pieces, and can be formed on, for example, only one first epidermis piece. Further, in addition to the sewing thread, the maintenance portion may be composed of an adhesive material such as a tape, an adhesive material (adhesive) such as a hot melt material, and a physical bonding material such as staples. Further, the other maintenance parts can be omitted if necessary. For example, when the second skin piece is composed of one second skin piece, the other maintenance parts can be omitted.

Further, in the present embodiment, the configurations (shape, dimensions, formation position, number of formations, etc.) of the skin (6S), the first stitch portions ST1a to ST1c, and the second stitch portions ST2a, ST2b are illustrated, but these skins and each stitch are illustrated. It is not intended to limit the composition of the department. For example, in addition to the case where the first stitch portion and the second stitch portion are crossed in a cross shape, they can be crossed so as to form various patterns such as a T-shape, an H-shape, and an X-shape. Further, at least one of the first stitch portion and the other first stitch portion can intersect the second stitch portion at an acute angle. For example, in this embodiment, either the central first stitch portion ST1a or the left first stitch portion ST1b may intersect the left second stitch portion ST2a at an acute angle. Further, the first stitch portion and the other first stitch portion may intersect the second stitch portion in a cross shape or may intersect in a tree shape alternately. Further, a part or all of the first stitch portion and the second stitch portion may have a curved shape such as a wavy shape or a zigzag bent shape in addition to a straight line. In addition, the first skin piece that composes the epidermis can cover the appropriate parts of the seat pad such as the main part of the top plate, the side part of the top plate, and the gusset part, and the second skin piece also has a seat according to the configuration of the first skin piece. The appropriate position of the pad can be covered. Further, the first epidermis piece can be composed of three or more first epidermis pieces, and the second epidermis piece can also be composed of three or more second epidermis pieces. A pad material such as urethane lami or a back base cloth such as a non-woven fabric can be appropriately attached to the back side of the epidermis.

Further, in the present embodiment, an example in which a skin is used for the seat cover 6S of the vehicle seat 2 has been described, but the skin can be used for various interior members, and the interior members for vehicles and the interior of the house are arranged in the vehicle room. It can be suitably used for an interior member (for example, a household interior member) arranged in. The configurations of the first skin piece and the second skin piece can be appropriately changed according to the type of interior member to be used, and the configuration of the skin pieces forming each of these skin pieces and the configuration of the seam allowance can also be appropriately changed. As interior members for vehicles, interior members to be mounted on vehicles such as vehicles, aircraft, and trains can be assumed. In addition to vehicle seats, interior trims such as door trims and various members such as instrument panels, ceilings, and consoles can be used. It can be illustrated. Further, in the vehicle seat, the configuration of the present embodiment can be applied to various seat constituent members such as a seat cushion, a headrest and an armrest, in addition to the seat back. For example, referring to FIG. 1, since a plurality of stitch portions ST are arranged in a cross shape on the seat cover 4S of the seat cushion, the configuration of this embodiment can be suitably applied to the seat cover 4S.

2 Seats for vehicles 4 Seat cushions 6 Seat backs 8 Headrests 6F Seat frames 6P Seat pads (base material of the present invention)
6S seat cover (skin of the present invention)
6a Top plate main part 6b Top plate side part 6c Kamachi part 10 Lateral recess (recess of the present invention)
10a First lateral recess 10b Second lateral recess 10c Third lateral recess 12 Left longitudinal recess (recess of the present invention)
14 Right vertical recess (recess of the present invention)
SP1 First skin piece 21a Upper first skin piece (first skin piece of the present invention)
21b Lower first epidermis piece (first epidermis piece of the present invention)
SP2 Left second skin piece (second skin piece of the present invention)
22a Upper left upper epidermis piece (second epidermis piece of the present invention)
22b Lower left side second epidermis piece (second epidermis piece of the present invention)
SP3 Right second skin piece (second skin piece of the present invention)
23a Upper right upper epidermis piece (second epidermis piece of the present invention)
23b Lower right side second epidermis piece (second epidermis piece of the present invention)
40 Maintenance part 42 Other maintenance part SM1 First seam allowance (seam allowance of the first skin piece of the present invention)
SM2 second seam allowance (seam allowance of the first skin piece of the present invention)
SM3 3rd seam allowance (seam allowance for the 2nd skin piece of the present invention)
SM4 4th seam allowance (seam allowance of the second skin piece of the present invention)
SM5 5th seam allowance (seam allowance of the 1st skin piece of the present invention)
E End of 5th seam allowance SM6 6th seam allowance (seam allowance of the second skin piece of the present invention)
ST1a Central first stitch portion (first stitch portion of the present invention)
ST1b Left first stitch portion (first stitch portion of the present invention)
ST1c Right side first stitch portion (first stitch portion of the present invention)
ST2a Left side second stitch portion (second stitch portion of the present invention)
ST2b Right side second stitch portion (second stitch portion of the present invention)
Y1 sewing thread Y2 other sewing thread

Claims (11)

The first epidermis piece composed of a pair of first epidermis pieces, the second epidermis piece composed of a plurality of or a single second epidermis piece, and the seam allowance of the pair of first epidermis pieces are sewn together. The first stitch portion and the second stitch portion for sewing the seam allowances of the first skin piece and the second skin piece are provided, and the seam allowance of the first skin piece is the seam allowance of each first skin piece. In the epidermis provided in a state of intersecting with
The seam allowance of the first skin piece includes a maintenance portion that maintains the seam allowance of each first skin piece that intersects with the seam allowance of the first skin piece in an inverted state, and a seam allowance of each of the first skin pieces. An epidermis provided with the second stitch portion that crosses the portion. The epidermis according to claim 1, wherein the seam allowance portion of each of the first epidermis pieces is maintained in a state of being tilted in a direction away from each other by the maintenance portion. The skin according to claim 1 or 2, wherein the maintenance portion is composed of a sewing thread in which a seam allowance portion of each of the first skin pieces in a folded state is sewn on the corresponding skin piece. A second skin piece composed of a pair of the second skin pieces and another first stitch portion for sewing the seam allowances of the pair of second skin pieces are provided, and the seam allowance of the second skin piece is provided. However, it is provided so as to intersect the seam allowance of each second epidermis piece.
The second stitch portion intersects the boundary between the first stitch portion and the other first stitch portion, and the second stitch portion intersects the boundary.
The second skin piece has another maintenance portion that maintains the seam allowance portion of each second skin piece that intersects the seam allowance of the second skin piece in an inverted state, and the seam allowance of each second skin piece. The epidermis according to any one of claims 1 to 3, wherein the second stitch portion that crosses the portion is provided. The epidermis according to claim 4 , wherein at least one of the first stitch portion and the other first stitch portion intersects the second stitch portion at an acute angle in the surface direction of the epidermis. With the epidermis covering the surface of the base material, the seam allowance of the first epidermis piece arranged on the back side of the epidermis intersects with the seam allowance of the first epidermis piece. The epidermis according to any one of claims 1 to 5, which is housed in a recess provided on the surface of the base material together with the portion. The skin according to any one of claims 1 to 6, wherein the maintenance portion is arranged within a range from the arrangement of the second stitch portion to the end of the seam allowance of the first skin piece. Production method. A first epidermis piece formed by suturing the seam allowances of a pair of first epidermis pieces at the first stitch portion and a second epidermis piece formed by a plurality of or a single second epidermis piece are provided.
The seam allowance of the first skin piece with respect to the second skin piece is provided so as to intersect the seam allowance of each first skin piece, and the seam allowance of the first skin piece and the second skin piece is sewn together at the second stitch portion. In the manufacturing method of
The seam allowance of the first skin piece is formed with a maintenance portion for maintaining at least one seam allowance of each first skin piece intersecting with the seam allowance of the first skin piece, and then the second stitch. A method for manufacturing an epidermis in which a portion is formed across a seam allowance portion of each of the first epidermis pieces. The method for manufacturing an epidermis according to claim 8, wherein the maintenance portion comprises a seam allowance in which a seam allowance portion of each of the first epidermis pieces in a folded state is sewn on the corresponding epidermis piece. Claim 8 or claim 8 in which the second stitch portion is formed from one of the pair of first skin pieces toward the other, and the maintenance portion is provided in one seam allowance portion of each first skin piece. 9. The method for producing an epidermis. The method for manufacturing an epidermis according to claim 9, wherein the maintenance portion is a stitch of the sewing thread provided so as to cross the seam allowance portion of each of the first epidermis pieces in the extending direction of the second stitch portion.

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