JP4982105B2 - Manufacturing method of headrest epidermis - Google Patents

Description

The present invention relates to a method for manufacturing a headrest skin for a headrest to be mounted on a backrest portion of a seat in a vehicle such as an automobile.

  Conventionally, as a skin for a headrest, one using leather as an outer skin is known in order to bring out a high-class feeling. Such a headrest is described in Patent Document 1 and the like. Then, this type of headrest skin 31 is, for example, as shown in FIG. 7, by sewing a plurality of skin sheets 32A, 32B, 32C, 32D, 32E of a predetermined shape together at their edges, as a whole. It is formed in a bag shape. By the way, as shown in FIG.7 and FIG.8 (a), each skin sheet 32A-32E is from the outer skin sheet 33 which consists of leather, and the slab sheet 34 which has the elasticity provided in the back surface side of the outer skin sheet 33. Thus, the outer sheet 33 and the slab sheet 34 are integrally stitched together by forming the seam 35 of the main stitch along their outer peripheral edges.

Then, as shown in FIG. 8 (b), for example, as shown in FIG. 8 (b), a pair of adjacent skin sheets 32A to 32E are sewn together at the end edges thereof by a seam stitch 36 of the main stitch, thereby forming a bag shape. The headrest skin 31 is formed. Furthermore, in a required sewing portion of the skin sheets 32A to 32E, for example, on the front side of the headrest skin 31, a sewing portion between the skin sheet 32A and the skin sheets 32B to 32D on the rear surface side and the both side surfaces side includes That is, as shown in FIG. 8C, a pair of decorative stitches 37 are formed so as to sandwich the sewn portion at the sewn portion that is noticeable.
JP 2003-230456 A

  However, in this conventional headrest skin, the skin sheets 33 and 32E are formed by stitching the outer skin sheet 33 and the slab sheet 34 at the seam 35 of the main stitch along their outer peripheral edges as described above. Has been. Therefore, as shown in FIG. 8A, in the portion where the seam 35 is formed, the slab sheet 34 is compressed against elasticity due to the seam tightening of the seam 35 to form a thin portion 34a. The thick portion 34b remains on the slab sheet 34 on the edge side. Therefore, after the stitching of the skin sheets 32A to 32E, as shown in FIGS. 8C and 9, when the decorative stitches 37 are formed on the stitched portions of the skin sheets 32A to 32E, the thin portion 34a and the wall thickness are formed. Due to the presence of the portion 34b, large unevenness and wrinkles are generated in the folded portion 38 at the edge of the skin sheets 32A to 32E.

  That is, the slab sheet 34 is compressed in the decorative stitch 37 portion by the tightening of the decorative stitch 37, while the thick portion 34b that is easily deformed in the thickness direction remains on the edge side after the thin portion 34a. . For this reason, the sheet feed becomes uneven in the extending direction of the sewing portion due to the pressing force by the presser foot of the sewing machine with respect to the sewing portion of the skin sheets 32A to 32E and the feed dog, and the stitch pitch and the stitch width of the decorative stitch 37 are increased. There was a problem of variation. Such a problem appeared remarkably especially in the stitched portions of the curved portions of the skin sheets 32A to 32E, and the appearance was remarkably impaired.

The present invention has been made paying attention to such problems existing in the prior art. The purpose is to provide a method of manufacturing a headrest skin that can suppress variations in stitch pitch and stitch width when forming decorative stitches along the seam after sewing the skin sheet. There is to do.

In order to achieve the above object, the present invention relating to a method for manufacturing a headrest skin is a method for manufacturing a headrest skin, which is cut into a predetermined shape and the same shape as the outer skin sheet. the epidermal sheets comprising a slab sheet provided on the back surface side of the Rutotomoni outer sheet, a thin portion is formed in advance on the edge of the epidermis sheets by overlock stitch chain stitch, then, the adjacent corresponding epidermal sheet Overlapping, stitching at the end with a main stitch, unfolding the skin sheet, folding back the end edge of the unfolded skin sheet in a superposed state, along the stitched portion by the main stitch at the folded portion It is characterized by forming decorative stitches .

  Therefore, in this skin sheet, the edge part of the slab sheet is compressed against the elasticity by the edge stitches, and a thin part is formed along the edge part of the slab sheet. For this reason, when forming a decorative stitch along the sewn portion of the skin sheet after forming a bag-like headrest skin by sewing a plurality of skin sheets, the edge of the skin sheet is deformed in the thickness direction. The amount is small. For this reason, a large unevenness | corrugation and a wrinkle do not generate | occur | produce in the folding | returning part of a skin sheet. Therefore, it is possible to prevent the possibility of variations in the stitch pitch and stitch width of the decorative stitch due to non-uniform sheet press and sheet feeding by the sewing machine, and form decorative stitches with uniform stitch pitch and stitch width. be able to.

  As described above, according to the present invention, when the decorative stitch is formed along the stitched portion after the skin sheet is sewn, it is possible to suppress variations in the stitch pitch and the stitch width. The appearance of the headrest can be improved.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1 to FIG. 4, the headrest skin 11 of this embodiment is formed by sewing a plurality of skin sheets 12A, 12B, 12C, 12D, and 12E having a predetermined shape together at their edges. It is formed so as to form a bag. A pair of stay insertion holes 13 are formed in the bottom of the front skin sheet 12A, and a stay 14 is inserted into the headrest skin 11 through these stay insertion holes 13, and both leg portions 14a of the stay 14 are inserted. Is projected downward. At the bottom of the headrest skin 11, an injection port 15 is formed between the outer peripheral edge portions of the front surface skin sheet 12 </ b> A and the lower surface skin sheet 12 </ b> E, and foams into the headrest skin 11 through the injection port 15. A foam material such as urethane is injected to be foam-molded.

  As shown in FIGS. 3, 4, and 5 (a), each of the skin sheets 12 </ b> A to 12 </ b> E is cut into a skin sheet 16 made of leather cut into a predetermined shape and the same shape as the skin sheet 16. A slab sheet 17 having flexibility and elasticity, such as a polyurethane foam sheet, which is superposed on the back surface side of the outer skin sheet 16. And since leather has poor stretchability, wrinkles are likely to occur after the headrest is foam-integrated with the skin. In order to prevent this wrinkle from being generated, the outer sheet 16 and the slab sheet 17 are not adhered to each other, and in the overlapped state of the outer sheet 16 and the slab sheet 17, the edge stitches 18 of the ring stitches are formed along the outer peripheral edges thereof. By being formed, the skin sheet 16 and the slab sheet 17 are sewn together to form the respective skin sheets 12A to 12E.

  In this case, since the outer sheet 16 and the slab sheet 17 are stitched together by the edge stitches 18 of the chain stitches, the end edges of the slab sheet 17 are caused by the seam tightening of the stitches 18 as shown in FIG. A thin portion 17 a is formed along the edge of the slab sheet 17 by being compressed against its own elasticity. That is, as shown in FIG. 8A, unlike the conventional configuration in which the outer sheet 33 and the slab sheet 34 are stitched together by the main stitch seam 35, the thick portion 34b is formed on the end edge side of the slab sheet 34. It will never be done.

  Then, as shown in FIG.5 (b), each adjacent skin sheet 12A-12E is mutually sewn on the edge by the seam 19 of the main stitch. Thereby, as shown in FIG.3 and FIG.5 (c), the skin 11 for headrests is formed so that it may form a bag shape as a whole. In this state, each of the skin sheets 12A to 12E changes from the polymerized state to the expanded state as shown in FIG. FIG. 3 shows a state in which the slab sheets 17 of the respective skin sheets 12A to 12E appear on the front side, that is, a state in which the skin 11 is turned over.

  Furthermore, as shown in FIG.5 (c), in the sewing part of required skin sheets 12A-12E, for example, in the front side of the skin 11 for headrests, the skin sheet 12A on the front side, and the skin sheets 12B on the rear side and both sides A pair of decorative stitches 20 is formed at the sewn portion with 12D. These decorative stitches 20 are used, for example, by using a two-needle vertical feed sewing machine or the like to fold the edge portions of the skin sheets 12A to 12E into a superposed state, and at the folded portion, the stitches by the main stitch seams 19 are formed. Formed along. Although not shown in the figure, the slab sheet 17 is compressed and thinned at the seam 19 and decorative stitch 20 portions.

  In this case, as shown in FIG. 5C and FIG. 6, a thin portion 17 a is formed by an edge seam 18 at the end edge portion of the slab sheet 17 in each of the skin sheets 12 </ b> A to 12 </ b> E. For this reason, unlike the conventional configuration, when the decorative stitch 20 is formed by a two-needle vertical feed sewing machine or the like, the edge of the slab sheet 17 is hardly deformed during sewing, and the edges of the skin sheets 12A to 12E There is almost no occurrence of large irregularities or wrinkles in the folded portion 21. Therefore, the feed by the feed dog of the sewing machine can be performed smoothly. That is, when sewing the decorative stitch 20, the sheet press and the sheet feeding by the sewing machine are smoothly performed without any trouble, and the decorative stitch 20 having a uniform stitch pitch and stitch width can be formed.

Therefore, this embodiment has the following effects.
(1) A decorative stitch 20 with a uniform seam pitch and the like can be formed, and a headrest having a good appearance can be obtained.

(2) Since the edge stitches 18 are chain stitches, the end surfaces of the skin sheets 12A to 12E can be covered and protected by the stitches 18.
(3) Since the edge portions of the respective skin sheets 12A to 12E are thin portions 17a, the rigidity of the edge portions is increased, and the end against the pressure when the foamed material is foamed in the skin 11 The edge becomes difficult to deform. For this reason, as a result, the unevenness | corrugation etc. of the surface of the outer skin 11 can be made a little, and the external appearance quality of a headrest can be improved.

  (4) Since the edge portions of the respective skin sheets 12A to 12E are thin portions 17a, large unevenness and wrinkles are not generated in the folded portion 21 even after decorative sewing, so that the surface of the headrest after foam molding is formed. Unevenness does not appear and appearance quality can be improved.

(Example of change)
In addition, this embodiment can also be changed and embodied as follows.
-The present invention is embodied in a configuration other than a headrest, an armrest.

  -Use a material other than leather as the skin sheet 16. Examples of materials other than leather include synthetic leather and vinyl sheets. Accordingly, in the present invention, leather includes natural leather, synthetic leather, and synthetic resin sheet.

The perspective view which shows the skin for headrests of one Embodiment. Sectional drawing of the skin for headrests of FIG. FIG. 2 is an enlarged perspective view showing the headrest skin shown in FIG. 1 in an inverted state. The disassembled perspective view which shows the epidermis sheet | seat which comprises the epidermis for the headrest. (A)-(c) is principal part sectional drawing which shows in order the process of sewing-forming the skin for headrests of embodiment. The principal part perspective view which shows the sewing part in the sewing process of FIG.5 (c). The disassembled perspective view which shows the skin sheet which comprises the conventional skin for headrests. (A)-(c) is principal part sectional drawing which shows in order the process of sewing-forming the conventional skin for headrests. The principal part perspective view which shows the sewing part in the sewing process of FIG.8 (c).

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Skin for headrest, 12A-12E ... Skin sheet, 16 ... Outer sheet, 17 ... Slab sheet, 17a ... Thin part, 18 ... Edge seam, 19 ... Stitch seam, 20 ... Decoration stitch, 21 ... Folding part .

Claims (1)

A method of manufacturing a headrest skin, comprising: a skin sheet comprising a skin sheet cut into a predetermined shape and a slab sheet cut into the same shape as the skin sheet and provided on the back side of the skin sheet . A thin portion is formed in advance on the edge of the skin sheet by edge stitching of the sewing ,
Then, the adjacent corresponding skin sheet is polymerized, and stitched at the end with a main stitch,
A headrest epidermis, characterized in that the skin sheet is developed and a decorative stitch is formed along the sewn portion by the main stitching at the folded portion while folding the edge portion of the spread skin sheet in a superposed state. Manufacturing method.

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