JP7273602B2 - vehicle seat - Google Patents

Description

The present invention relates to vehicle seats.

2. Description of the Related Art In a seat mounted in a vehicle such as an automobile, a trim cover covering a cushion pad is typically made by sewing a plurality of skin materials together. A groove is provided in the cushion pad, and the seam between the skin materials is accommodated in the groove. The sutured portion is fixed in a state of being drawn into the groove, for example, by being engaged with a wire arranged at the bottom of the groove using a fastener such as a C-ring. Further, in the vehicle seat disclosed in Patent Document 1, the sewn portion is pushed into the groove and adhered to the bottom of the groove, thereby being fixed while being pulled into the groove.

JP 2016-129645 A

When the seams of the skin materials of the trim cover are pushed into the grooves of the cushion pad, the ends of the skin materials are separated from each other by, for example, rubbing the back surface of the edge of the skin material against the side surface of the groove of the cushion pad. , the suture may open. When the stitched portion is opened, the surface of the terminal portion of the skin material becomes an adhesive surface, and when the surface of the skin material is formed of leather, for example, it may be difficult to bond the stitched portion to the bottom of the groove. .

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and provides a vehicle seat in which the seams of skin materials of a trim cover are pushed into grooves of a cushion pad and adhered to the grooves. It is intended to

A vehicle seat according to one aspect of the present invention includes a trim cover formed by stitching a plurality of skin materials together, and a cushion pad covered by the trim cover, wherein the cushion pad is composed of two skin materials stitched together. and a groove to which the pushed-in sutured portion is adhered, the sutured portion having a first stitch line and a terminal side of the two skin materials from the first stitch line. and a second stitch line provided, wherein the sewn part has the back surface of the terminal side of the skin material adhered to the groove, and the terminal ends of the two skin materials from the second stitch line. The seam allowance is 2 mm or less, and the sewing thread of the second stitch line is thinner than the sewing thread of the first stitch line .

Advantageous Effects of Invention According to the present invention, in a vehicle seat in which a seamed portion between surface materials of a trim cover is pushed into a groove of a cushion pad and adhered to the groove, the seamed portion can be stably bonded.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows an example of the vehicle seat for describing embodiment of this invention. FIG. 2 is a cross-sectional view of a sewn portion of the trim cover of FIG. 1; 2 is a cross-sectional view taken along line III-III of FIG. 1; FIG. FIG. 4 is a schematic diagram illustrating a method of adhering the stitched portion of the trim cover of FIG. 2 to the groove of the cushion pad of FIG. 3; FIG. 4 is a schematic diagram illustrating a method of adhering the stitched portion of the trim cover of FIG. 2 to the groove of the cushion pad of FIG. 3; FIG. 4 is a schematic diagram illustrating a method of adhering the stitched portion of the trim cover of FIG. 2 to the groove of the cushion pad of FIG. 3;

FIG. 1 shows an example of a vehicle seat for describing an embodiment of the invention.

A vehicle seat 1 shown in FIG. 1 is a seat mounted in a vehicle such as an automobile. The seat 1 includes a seat cushion 2 that supports the buttocks and thighs of an occupant seated on the seat 1, and a seat back 3 that supports the waist and back of the occupant.

The seat cushion 2 includes a frame forming the skeleton of the seat back, a cushion pad 4 supported by the frame, and a trim cover 5 covering the frame and the cushion pad 4 . The seat back 3 also includes a frame, a cushion pad 6 and a trim cover 7.

The trim cover is made by stitching together a plurality of skin materials. For example, the front body of the trim cover 5 covering the seating surface of the seat cushion 2 is made by stitching together four skin materials 10a to 10d. The upholstery 10a is arranged on the front side of the seat at the center in the width direction of the seat, and the upholstery 10b is arranged on the rear side of the seat at the center in the width direction of the seat. 11a extends in the width direction of the seat at the central portion in the front-rear direction of the seat. The skin materials 10c and 10d are arranged with the skin materials 10a and 10b sandwiched in the seat width direction. The seamed portion 11c with 10b extends in the seat front-rear direction. These stitched portions 11a to 11c and their vicinity are pulled into the cushion pad 4, and the seating surface of the seat cushion 2 is undulated.

The cushion pads 4 and 6 are made of a relatively soft resin foam material such as urethane foam. The skin material of the trim covers 5 and 7 is, for example, leather (natural leather, synthetic leather), woven fabric, non-woven fabric, or knitted fabric. The skin material may have a single layer structure such as leather, woven fabric, non-woven fabric, or knitted fabric, or a surface material such as leather, woven fabric, non-woven fabric, or knitted fabric, and a wadding (for example, elastically deformable A multilayer structure in which a lining material such as a resin foam such as flexible polyurethane foam is laminated may be used. The trim cover may be made of one kind of skin material, or may be made of different kinds of skin materials depending on the part.

FIG. 2 shows the stitched portion of the trim cover made by stitching two skin materials together, and FIG. 3 shows the groove of the cushion pad into which the stitched portion is pushed and adhered.

The two skin materials 10 shown in FIG. 2 have a surface material 12 and a backing material 13 laminated on the back surface of the surface material 12 . The face material 12 is leather and the backing material 13 is wadding. The end portions of the two skin materials 10 are sewn together in a state in which the surface materials 12 of the skin materials 10 are overlapped so as to be in contact with each other. The sewn portion 11 has a first stitch line 14 and a second stitch line 15 that sew together the end portions of the two skin materials 10 .

The first stitch line 14 mainly sews together the two upholstery materials 10 and secures the bonding strength between them, and is typically a straight stitch. The seam allowance W1 from the first stitch line 14 to the end of the upholstery material 10 is appropriately set in consideration of the tear strength of the upholstery material 10, and is preferably around 5 mm, for example. The second stitch line 15 is provided closer to the terminal end of the upholstery material 10 than the first stitch line 14 and mainly suppresses the opening of the stitched portion 11 .

Cushion pads 4 and 6 have grooves 16 . The sewn portion 11 is arranged along the groove 16 when the trim covers 5 and 7 are put on the cushion pads 4 and 6 . An adhesive 17 is placed on the bottom of the groove 16 . Suture 11 is pressed into groove 16 and adhered to the bottom of groove 16 by adhesive 17 .

When the sewn portion 11 is pushed into the groove 16 , the back surfaces of the ends of the two skin materials 10 forming the sewn portion 11 rub against the side surfaces of the groove 16 , but the second stitch line 15 keeps the sewn portion 11 open. is suppressed. Therefore, the surface of the end portion of the skin material 10 is not exposed to the bottom of the groove 16, or the exposure of the surface is suppressed. Glued to the bottom. As a result, if the adhesive 17 exhibits adhesiveness to at least the back surface of the upholstery 10 , the sewn portion 11 can be stably adhered to the bottom of the groove 16 .

In this example, the surface of the upholstery material 10 is made of leather, and the adhesive 17 hardly penetrates into the leather. On the other hand, the back surface of the upholstery material 10 is formed of wadding that is more porous than leather, and the adhesive 17 easily penetrates into the wadding. The sewn portion 11 is adhered to the bottom of the groove 16 using the back surface of the terminal portion of the upholstery material 10 formed by wadding as an adhesive surface, so that even if the surface of the upholstery material 10 is formed of leather, the sewn portion can be maintained. 11 can be reliably adhered, and the adhesive strength can be increased.

A seam allowance W2 from the second stitch line 15 to the end of the upholstery material 10 is preferably 2 mm or less from the viewpoint of suppressing the stitched portion 11 from opening. The seam allowance W2 is preferably as small as possible from the viewpoint of suppressing the opening of the sewn portion 11, but is preferably 1 mm or more in consideration of workability of sewing. Further, the second stitch line 15 may be a straight stitch, or may be an overlock stitch in which the sewing thread goes around the end of the upholstery material 10. By overlock stitching, the opening of the sewn portion 11 can be further suppressed. In addition, the thread of the second stitch line 15, which mainly suppresses the opening of the seamed portion 11, can be thinner than the thread of the first stitch line 14, which ensures the joint strength of the two upholstery materials 10. If the sewing thread is thin, the seam allowance W2 from the second stitch line 15 to the end of the upholstery material 10 can be further reduced.

Although the adhesive 17 is not particularly limited, for example, a hot melt adhesive can be used. FIGS. 4 to 6 show an example of a bonding method for bonding the sewn portion 11 to the bottom of the groove 16 using a hot melt adhesive.

As shown in FIG. 4, a hot melt adhesive 17 is pre-positioned in the grooves 16 of the cushion pads 4,6. A push-in plate 20 is attached to the sewn portion 11 along the first stitch line 14 of the sewn portion 11 from the front sides of the trim covers 5 and 7 . The sewn portion 11 is then pushed into the groove 16 by the pushing plate 20 . A plurality of needle-like projections 21 are provided on the push-in plate 20 at suitable intervals in the longitudinal direction of the plate. By penetrating through, the stitched portion 11 and the pushing plate 20 are prevented from slipping.

As shown in FIG. 5 , after the sewn portion 11 is pushed into the groove 16 , the steam nozzle 22 is inserted into the cushion pads 4 and 6 and the tip of the steam nozzle 22 is placed near the bottom of the groove 16 . High-temperature steam is jetted out from the tip of the steam nozzle 22 . The hot melt adhesive 17 in the grooves 16 is melted by the ejected high-temperature steam. The melted hot-melt adhesive 17 soaks into the cushion pads 4 and 6, and also into the back surface of the end portion of the upholstery material 10 that serves as the bonding surface of the sewn portion 11, that is, the lining material 13 made of wadding. Then, the hot-melt adhesive 17 soaks into the cushion pads 4 and 6 and the backing material 13 and is cooled and solidified. As a result, the sutured portion 11 is adhered to the bottom of the groove 16 .

Finally, as shown in FIG. 6, the pusher plate 20 is withdrawn from the stitched portion 11 and the steam nozzle 22 is withdrawn from the cushion pads 4,6.

So far, the present invention has been described using the seat 1 mounted in a vehicle such as an automobile as an example, but the present invention can also be applied to a vehicle seat other than a vehicle such as a ship or an aircraft.

As described above, the vehicle seat disclosed in this specification includes a trim cover formed by stitching together a plurality of skin materials, and a cushion pad covered by the trim cover. A seam in which two pieces of skin material are sewn together has a groove into which the seam is pressed and the seam that is pressed in is adhered, and the seam is formed by a first stitch line and the two sheets more than the first stitch line. and a second stitch line provided on the terminal side of the skin material.

Further, in the vehicle seat disclosed in this specification, the seam allowance from the second stitch line to the ends of the two upholstery materials is 2 mm or less.

Also, in the vehicle seat disclosed in this specification, the second stitch line is an overlock stitch in which a sewing thread goes around the ends of the two upholstery materials.

Also, in the vehicle seat disclosed herein, the thread of the second stitch line is thinner than the thread of the first stitch line.

Further, in the vehicle seat disclosed in this specification, the two skin materials have a surface material and a lining material bonded to the back surface of the surface material, and the lining material It is more porous than wood.

Also, in the vehicle seat disclosed herein, the surface material is leather.

1 Vehicle seat 2 Seat cushion 3 Seat back 4 Cushion pad 5 Trim cover 6 Cushion pad 7 Trim cover 10 Skin material 11 Stitched portion 12 Surface material 13 Lining material 14 First stitch line 15 Second stitch line 16 Groove 17 Adhesive W1 Seam allowance W2 Seam allowance

Claims (3)

a trim cover made by stitching together a plurality of skin materials;
a cushion pad covered by the trim cover;
with
The cushion pad has a groove into which a sewn portion in which two skin materials are sewn together is pushed and the pushed sewn portion is adhered,
The sutured portion is
a first stitch line;
a second stitch line provided closer to the ends of the two skin materials than the first stitch line;
has
The sewn part has a back surface on the terminal side of the skin material adhered to the groove,
A seam allowance from the second stitch line to the ends of the two skin materials is 2 mm or less, and the sewing thread of the second stitch line is thinner than the sewing thread of the first stitch line. A vehicle seat according to claim 1 ,
The two skin materials are
a surface material;
a backing material bonded to the back surface of the surface material;
has
The vehicle seat, wherein the backing material is more porous than the surface material. A vehicle seat according to claim 2 ,
A vehicle seat, wherein the surface material is leather.

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