JP5252175B2 - Trim cover and manufacturing method thereof - Google Patents

Description

  The present invention relates to a trim cover attached to a vehicle seat structure and a method for manufacturing the trim cover, and more particularly, a trim cover capable of providing a plump feeling when the trim cover is placed on the seat structure and a method for manufacturing the trim cover. About.

  When the vehicle seat is assembled, a trim cover is attached to the seat structure. The trim cover is formed of a material such as synthetic leather, genuine leather, or cloth, is formed in a substantially bag shape, and is then attached to a seat structure including a cushion or the like. Synthetic leather and genuine leather have a higher seam allowance compared to cloth, so when the bag is formed, the seam lines meander. Therefore, skill is required to attach the trim cover to the seat structure so as not to meander. If the sewing line of the trim cover attached to the seat structure is meandering, the appearance is impaired. In Patent Document 1, as shown in FIGS. 11A and 11B, a sewing line 40 can be maintained in a straight line by sewing a resin core material 30 together.

  FIG. 11A is a partial cross-sectional view of the upper left portion of the seat structure. Three of the trim cover piece 50 serving as the upper surface, the trim cover piece 51 serving as the left side surface, and the core member 30 are sewn with the sewing thread 20. ing. The seam allowance 7 is from the sewing thread 20 to the tip. As shown in FIG. 11B, the core material 30 has a long shape, and a ball portion for obtaining rigidity is provided at one end. Such a core material 30 can prevent the meandering of the stitching line, but cannot give a plump feeling to the mounted trim cover.

In order to prevent the meandering of the stitching line without using the core material, there is a method of folding the ends of the two trim covers and stitching them together. However, in order to give the trim cover a feeling of plumpness, it is necessary to cut the fabric greatly in order to sew together by increasing the number of folds, and there is a problem of cost in high-grade leather products.
Japanese Patent Laid-Open No. 2007-208

  An object of the present invention is to provide a trim cover that can provide a feeling of plumpness when the trim cover is attached to a seat structure.

To achieve the above object, the trim cover according to claim 1 of the present invention, in the trim cover comprising a plurality of trim cover piece attached to the seat structure, the ends of the trim cover piece which is arranged laterally are curved inward, the surface of the trim cover piece which is arranged on a surface and vertical disposed curved lateral trim cover pieces, stacked face-to-face with each other, the seam allowance and to one side of the superposed end overhanging margin lamellar core having a are sewn et al is, a slant state by supporting the bottom of the seam allowance of the core at the corners of the seat structure, the overhanging margin of one end of the core material, is disposed vertically It is characterized by projecting inside the trim cover piece .

  The invention according to claim 2 is characterized in that the core material is composed of a non-woven mat, and the trim cover piece has a structure in which a urethane foam layer is laminated on the back surface of synthetic leather or genuine leather.

  According to a third aspect of the present invention, the core member has an arc-shaped short side portion, and the short side portion is formed so as to cover two surfaces of the seat structure by one sheet. It is characterized by being sewn to the corner of one piece.

According to a fourth aspect of the present invention, there is provided a method of manufacturing a trim cover according to a fourth aspect of the present invention, in which a plurality of trim cover pieces are stitched together to form a back-side bag shape and then turned upside down to be attached to a seat structure. The two trim cover pieces to be sewn are overlapped with each other so that the surfaces of the two trim cover pieces face each other, and a thin plate-like core material having a seam allowance and an overhang allowance is overlaid thereon, When attaching the trim cover piece and the core material to the seat structure with the seam allowance turned upside down, the end of the trim cover piece placed sideways is bent inward, and the bottom part of the core material seam allowance is The corner structure of the seat structure is supported in an inclined state, and one end of the overhang of the core material is projected to the inside of the trim cover piece arranged vertically .

  According to the trim cover of the first aspect of the present invention and the method of manufacturing the trim cover according to the fourth aspect of the present invention, since the core material is formed into a thin plate shape and has a seam allowance and an overhang allowance, the trim cover When the is attached to the seat structure, the overhang allowance supported by the seam allowance can bend along the longitudinal direction and the trim cover can be pushed outward, so that the trim cover can have a plump feeling.

  According to claim 2 of the present invention, since the core material is a non-woven mat, the core material is provided with appropriate rigidity (by the resin layer) and softness (by the non-woven fabric), and the overhang of the core material is reduced. At the same time, the trim cover piece can be pushed out to create a plump feeling. Since the trim cover is a synthetic leather or genuine leather provided with a urethane foam lining, the trim cover can give a plump feeling when the end of the trim cover piece away from the core is curved.

  According to the third aspect of the present invention, the short side portion of the core member is formed in an arc shape and is sewn at the corner portion of the bag shape, so that one sheet covers the two surfaces of the seat structure. When the trim cover piece formed on is turned upside down, it is covered along the outer periphery of the arc shape. Therefore, a feeling of plumpness can be produced and the trim cover can be projected outward. Even if the trim cover is pushed from the outside, the direction is parallel to the core sheet, so that the trim cover can be prevented from being recessed. In order to give a plump feeling, the short side of the core is used.

  Hereinafter, a trim cover according to the present invention will be described with reference to the drawings.

  FIG. 1 is a partial cross-sectional view of the upper left portion when a trim cover according to the present invention is attached to a seat structure. Specifically, FIG. 7 is a cross-sectional view taken along the line AA in FIG. The trim cover piece 50 is the upper surface of the bag-shaped trim cover, and the trim cover piece 51 is the left side surface of the trim cover. The trim cover piece 50, the trim cover piece 51, and the core member 30 are sewn with the sewing thread 20, and a straight stitch line 40 can be seen from the outside. The sewing thread 20 is not visible from the outside. The trim cover piece 50 and the trim cover piece 51 are made of synthetic leather 4 on the surface and have the urethane foam layer 3 on the lining. The synthetic leather 4 may be genuine leather. The core member 30 is made of a non-woven mat so as to be more rigid than the trim cover.

  As shown in FIG. 1, the left side of the trim cover piece 50 (in the direction indicated by the arrow) is greatly curved by the elasticity of the foamed urethane layer 3 sponge, thereby providing a feeling of plumpness. Since the end portion of the trim cover piece 50 is curved, the core member 30 is not vertical, and the bottom portion of the seam allowance 7 is supported by the seat structure 6 and is in an inclined state. Therefore, one end of the core member 30 on the overhanging margin 8 side is bent and protrudes in the left direction. As a result, the trim cover piece 51 swells to give a feeling of plumpness. The width of the overhang allowance 8 of the core material 30 is longer than the width of the seam allowance 7. Here, when the elasticity of the foamed urethane layer 3 is small, the curvature of the trim cover piece 50 is small, and in some cases, it contacts the edge of the core member 30. In addition, when the rigidity of the core material 30 is small, the overhang allowance 8 of the core material 30 is greatly deflected, and the overhang amount is small. When the bottom portion of the seam allowance 7 is not supported by the seat structure 6 and the core member 30 is nearly vertical, the overhang amount is small.

  FIG. 2 is a partial cross-sectional view of the portion shown in FIG. 1 during trim cover sewing. Specifically, a BB cross-sectional view of FIG. 6 or a BB cross-sectional view of FIG. 8 is shown. The ends of the trim cover piece 50 and the trim cover piece 51 are overlapped so that the lining of the trim cover is on the front side, that is, the surface of the synthetic leather 4 facing each other, and one side of the end portion (FIG. 2 The core material 30 is disposed on the right side of the sewing material 30, the width of the seam allowance 7 is taken, and these are sewn with the sewing thread 20. In the present embodiment, the core member 30 and the trim cover piece 51 are previously sewn with the sewing thread 20a. Thereby, the clearance between the trim cover piece 51 and the core material 30 can be eliminated, and the rigidity of the core material 30 at the seam allowance 7 can be increased. After such sewing, turn the trim cover over. Therefore, the trim cover piece 51 is turned up as indicated by an arrow, and the core member 30 is rotated approximately 180 degrees counterclockwise. Further, the end portion of the trim cover piece 50 is also curved as shown in FIG. The core material 30 had a width W2 of an overhang allowance of about 30 mm and a width W1 of a seam allowance of 10 mm. Although not limited to such a value, W1 <W2 and W2 is preferably 2 to 5 times W1.

  FIG. 3 is an enlarged view of the core material at a portion of a circle C indicated by a dotted line in FIG. 2, and is a cross-sectional view showing the structure of the core material 30. Here, the core material 30 is a non-woven mat. The nonwoven fabric mat comprises a polyester nonwoven fabric 1, a flame retardant resin layer 9, and a polyethylene backing 2 as a backing. The total basis weight (weight per unit area) was 480 g / m 2 as an example. The core member 30 may be a flexible resin plate.

  FIG. 4 is a perspective view of a core material (core material example 1). The core material 30a is a sheet having a long and thin rectangular plate, the nonwoven fabric 1 on the front side, and the backing 2 on the back side. The sewing thread 20 enters the portion indicated by the two-dot chain line of the core material 30a. One of the sewing threads 20 is a seam allowance 7 and the other is an overhang allowance 8.

  FIG. 5 is a perspective view of a core material (core material example 2). The core material 30b is a sheet having a long shape and having a nonwoven fabric 1 on the front side and a backing 2 on the back side. The sewing thread 20 enters the portion indicated by the two-dot chain line of the core material 30b. One of the sewing threads 20 is a seam allowance 7 and the other is an overhang allowance 8. Here, the outer periphery of the short side portion of the core member 30b has a quadrant arc shape.

  FIG. 6 is a perspective view (core material example 1) during sewing of the trim cover according to the present invention. The core material 30a shown in FIG. 4 was used for the core material. The trim cover 10 is for covering the armrest of the seat structure. In this embodiment, the trim cover piece is composed of a total of four trim cover pieces, two on the left and right side surfaces, one on the rear surface, and one on the upper surface and the front surface. The trim cover piece is sewn with the back side out. First, the core material 30a is sewn to the end of the trim cover piece 51 on the left side surface with the sewing thread 20a. Thereafter, this was sewn to the end of the trim cover piece 50 with the sewing thread 20. The same applies to the right side. The core material 30a on the rear surface is sewn together with the sewing thread 20 at one time. A partial cross-sectional view taken along line BB in FIG. 6 is as shown in FIG. In this way, a bag shape in the back side state is obtained. After sewing, when the trim cover is turned upside down as indicated by four upward arrows, a bag-shaped trim cover 10 as shown in FIG. 6 is obtained.

  FIG. 7 is a perspective view showing an appearance of the trim cover of FIG. A partial cross-sectional view taken along line AA in FIG. 7 is as shown in FIG. According to this, as shown by a plurality of short arrows, the top surface, both side surfaces, and the end of the rear surface along the stitching line 40 protrude, so that the trim cover 10 can have a plump feeling.

  FIG. 8 is a perspective view (core material example 2) at the time of sewing the trim cover according to the present invention. The core 30b shown in FIG. 5 was used for the side core. Others are the same as the example of FIG. Moreover, the fragmentary sectional view by the BB line of FIG. 8 is as showing in FIG. The core member 30b is sewn so that the arc-shaped short side portion is positioned at the corner portion at the upper left front side. After the sewing, when the trim cover is turned upside down as indicated by four upward arrows, a bag-shaped trim cover 10 shown in FIG. 9 is obtained.

  FIG. 9 is a perspective view showing an appearance of the trim cover of FIG. A partial cross-sectional view taken along line AA in FIG. 9 is as shown in FIG. Since the trim cover piece 50 covering the upper part and the front part covers the arcuate surface of the core member 30b when turned upside down, the short side portion of the arc of the core member 30b protrudes forward as shown in FIG. You can For this reason, even when the core material 30a like the back is not provided on the front side, the left and right corners of the front can be projected forward. As a result, the upper surface, both side surfaces, and rear end portions along the stitching line 40 project, and the front upper end without the stitching line 40 also projects, so that the trim cover 10 can have a plump feeling.

  FIG. 10 is a chart showing the manufacturing procedure of the trim cover according to the present invention. In step S1, the ends of two trim cover pieces to be sewn are overlapped so that the surfaces face each other, and a core material is placed thereon. In S2, these three members are put together to take a seam allowance and sew together. In S3, a plurality of trim cover pieces are stitched together to form a bag in the back side state. At S4, the final trim cover is obtained by turning it over.

  Since the trim cover according to the present invention can provide a feeling of plumpness, it is suitable not only for a vehicle seat structure but also for a structure such as a home chair.

It is a fragmentary sectional view of the upper left part when the trim cover by this invention is attached to a seat structure. It is a fragmentary sectional view at the time of sewing of the trim cover of the part shown in FIG. FIG. 3 is an enlarged view of a core material at a circle C indicated by a dotted line in FIG. 2. It is a perspective view of the core material (core material example 1) by this invention. It is a perspective view of the core material (core material example 2) by this invention. It is a perspective view at the time of sewing of a trim cover by the present invention. (Core material example 1) It is a perspective view which shows the external appearance of the trim cover of FIG. It is a perspective view at the time of sewing of a trim cover by the present invention. (Core material example 2) It is a perspective view which shows the external appearance of the trim cover of FIG. It is a chart which shows the manufacture procedure of the trim cover by this invention. It is a fragmentary sectional view which shows the structure of the conventional trim cover. (A) is the fragmentary sectional view of the upper left part of the trim cover attached to the seat structure. (B) is a perspective view of a core material.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Nonwoven fabric 2 Backing 3 Urethane foam layer 4 Synthetic leather 6 Seat structure 7 Sewing allowance 8 Overhang allowance 9 Resin layer 10 Trim cover 20, 20a Sewing thread 30 Core material 30a Core material (core material example 1)
30b Core material (Core material example 2)
40 Sewing line 50, 51 Trim cover piece W1 Width of sewing allowance W2 Width of overhang allowance S1 to S4 Procedure

Claims (4)

In a trim cover made up of a plurality of trim cover pieces attached to a seat structure, the end portions of the trim cover pieces arranged sideways are curved inward, and the surface of the trim cover piece arranged sideways is vertically on the surface of the deployed trim cover pieces, stacked face-to-face with each other, thin plate-like core material having a seam allowance and overhanging margin on one side of the superimposed ends sewn et al is, the seam allowance of the core material A trim cover characterized in that a bottom portion is supported by a corner portion of a seat structure so as to be in an inclined state, and one end of a core material overhanging portion is projected inside a trim cover piece arranged vertically .
2. The trim cover according to claim 1, wherein the core material is constituted by a nonwoven fabric mat, and the trim cover piece has a structure in which a urethane foam layer is laminated on the back surface of synthetic leather or genuine leather.
The core member has an arc-shaped short side portion, and the short side portion is sewn to a corner portion of a trim cover piece formed so as to cover two surfaces of the seat structure. The trim cover according to claim 1 or 2, wherein
A method of manufacturing a trim cover to be attached to a seat structure after turning a plurality of trim cover pieces together to form a bag shape in the back side state,
The two trim cover pieces are overlapped with end portions so that the surfaces of the two trim cover pieces to be stitched face each other, and a thin plate-like core material having a seam allowance and an overhang allowance is placed thereon. The core cover is sewn with a seam allowance, and when it is turned over and attached to the seat structure, the end of the trim cover piece placed sideways is curved inward, and the bottom part of the core seam allowance is seated. A method of manufacturing a trim cover, characterized in that the end portion of the core material is extended to the inner side of a vertically arranged trim cover piece so as to be obliquely supported by the corner portion .

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