JP2020175785A - Seat for vehicle - Google Patents

Abstract

To stably bond a sewing part, in a seat for a vehicle in which the sewing part of skin materials of a trim cover is pushed into a groove of a cushion pad, and bonded to the groove.SOLUTION: A seat for a vehicle comprises a trim cover which is formed by sewing a plurality of pieces of skin materials, and cushion pads 4, 6 covered with the trim cover. The cushion pads 4, 6 have a groove 16 into which a sewing part 11 formed by sewing two pieces of the skin materials 10 is pushed, and to which the pushed-in sewing part 11 is bonded. The sewing part 11 has a first stich line and a second stich line formed at a terminal end side of two pieces of the skin materials 10 rather than the first stich line.SELECTED DRAWING: Figure 3

Description

The present invention relates to a vehicle seat.

In a seat mounted on a vehicle such as an automobile, the trim cover covering the cushion pad is typically made of a plurality of skin materials sewn together. The cushion pad is provided with a groove, and the sutured portion between the skin materials is accommodated in the groove. The sewn portion is fixed in a state of being drawn into the groove by being locked to a wire arranged at the bottom of the groove by using a fastener such as a C ring. Further, in the vehicle seat described in Patent Document 1, the sewn portion is pushed into the groove and adhered to the bottom of the groove to be fixed in a state of being drawn into the groove.

Japanese Unexamined Patent Publication No. 2016-129645

When the sutures between the skin materials of the trim cover are pushed into the groove of the cushion pad, for example, the back surface of the terminal part of the skin material and the side surface of the groove of the cushion pad rub against each other, so that the terminal parts of the skin material are separated from each other. , The sutured part may open. When the sewn portion is opened, the surface of the end portion of the skin material becomes an adhesive surface, and when the surface of the skin material is formed of, for example, leather, it may be difficult to bond the sewn portion to the bottom of the groove. ..

The present invention has been made in view of the above circumstances, and stabilizes the adhesion of the sewn portions in the vehicle seat in which the sewn portions of the skin materials of the trim cover are pushed into the grooves of the cushion pad and adhered to the grooves. The purpose is to do it.

The vehicle seat of one aspect of the present invention includes a trim cover in which a plurality of skin materials are sewn together, and a cushion pad covered by the trim cover. The cushion pad is provided with two skin materials sewn together. The sewn portion is pushed in and has a groove to which the pushed sewn portion is adhered, and the sewn portion is located on the first stitch line and the terminal side of the two skin materials with respect to the first stitch line. It has a second stitch line provided.

According to the present invention, in a vehicle seat in which the sutured portions of the skin materials of the trim cover are pushed into the grooves of the cushion pad and adhered to the grooves, the sutured portions can be stably adhered to each other.

It is a perspective view which shows an example of the vehicle seat for demonstrating the embodiment of this invention. It is sectional drawing of the stitched part of the trim cover of FIG. FIG. 3 is a sectional view taken along line III-III of FIG. It is a schematic diagram explaining the method of adhering the suture part of the trim cover of FIG. 2 to the groove of the cushion pad of FIG. It is a schematic diagram explaining the method of adhering the suture part of the trim cover of FIG. 2 to the groove of the cushion pad of FIG. It is a schematic diagram explaining the method of adhering the suture part of the trim cover of FIG. 2 to the groove of the cushion pad of FIG.

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

The vehicle seat 1 shown in FIG. 1 is a seat mounted on 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 seated person.

The seat cushion 2 includes a frame forming a 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.

A plurality of skin materials are sewn together in the trim cover. For example, four skin materials 10a to 10d are sewn together on the front body of the trim cover 5 that covers the seating surface of the seat cushion 2. The skin material 10a is arranged on the front side of the seat in the central portion in the seat width direction, and the skin material 10b is arranged on the rear side of the seat in the central portion in the seat width direction, and the suture portion between the skin material 10a and the skin material 10b. 11a extends in the center portion in the front-rear direction of the seat in the width direction of the seat. The skin material 10c and the skin material 10d are arranged so as to sandwich the skin materials 10a and 10b in the sheet width direction, and the suture portion 11b between the skin material 10c and the skin materials 10a and 10b, and the skin material 10d and the skin material 10a, The sutured portion 11c with the 10b extends in the front-rear direction of the seat. These sutured portions 11a to 11c and their vicinity are drawn into the cushion pad 4, and undulations are formed on the seating surface of the seat cushion 2.

The cushion pads 4 and 6 are made of a relatively soft resin foam material such as urethane foam. The skin materials of the trim covers 5 and 7 are, for example, leather (natural leather, synthetic leather), woven fabric, non-woven fabric, knitted fabric, and the like. The outer skin material may have a single-layer structure such as leather, woven fabric, non-woven fabric, or knitted fabric, or leather, woven fabric, non-woven fabric, knitted fabric, or the like may be used as the surface material, and wading (for example, elastic deformation is possible) on the back surface of the surface material. It may have a multi-layer structure in which a backing material such as a flexible polyurethane foam) or the like is laminated. The trim cover may be formed of one type of skin material, or may be formed of a plurality of types of skin material that differ depending on the site.

FIG. 2 shows a sewn portion of a trim cover in which two skin materials are sewn together, and FIG. 3 shows a groove of a cushion pad to which the sewn 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 surface material 12 is leather and the lining material 13 is wading. The terminal portions of the two skin materials 10 are sewn together in a state where the surface materials 12 of the skin materials 10 are overlapped so as to be in contact with each other. The stitched portion 11 has a first stitch line 14 and a second stitch line 15 for sewing the terminal portions of the two skin materials 10.

The first stitch line 14 mainly stitches two skin materials 10 together to secure the joint strength between them, and is typically a straight stitch. The seam allowance W1 from the first stitch line 14 to the end of the skin material 10 is appropriately set in consideration of the tear strength of the skin material 10, and is preferably around 5 mm, for example. The second stitch line 15 is provided on the terminal side of the skin material 10 with respect to the first stitch line 14, and mainly suppresses the opening of the stitch portion 11.

The cushion pads 4 and 6 have a groove 16. When the trim covers 5 and 7 are put on the cushion pads 4 and 6, the sewn portion 11 is arranged along the groove 16. An adhesive 17 is arranged at the bottom of the groove 16. The sewn portion 11 is pushed into the groove 16 and is adhered to the bottom of the groove 16 by the adhesive 17.

When the suture portion 11 is pushed into the groove 16, the back surface of the terminal portion of each of the two skin materials 10 forming the suture portion 11 rubs against the side surface of the groove 16, but the suture portion 11 is opened by the second stitch line 15. Is suppressed. Therefore, the surface of the terminal portion of the skin material 10 is not exposed to the bottom of the groove 16, or the exposure of the surface is suppressed, and the back surface of the terminal portion of the skin material 10 is used as an adhesive surface, and the suture portion 11 is formed in the groove 16. Adhered to the bottom. As a result, if the adhesive 17 is an adhesive that exhibits adhesiveness to at least the back surface of the skin material 10, the sutured portion 11 can be stably adhered to the bottom of the groove 16.

In this example, the surface of the skin material 10 is formed of leather, and the adhesive 17 does not easily penetrate into the leather. On the other hand, the back surface of the skin material 10 is formed by a wading that is more porous than leather, and the adhesive 17 easily penetrates into the wading. The back surface of the end portion of the skin material 10 formed by wading is used as an adhesive surface, and the suture portion 11 is adhered to the bottom of the groove 16, so that even if the surface of the skin material 10 is formed of leather, the suture portion is formed. 11 can be reliably adhered, and the adhesive strength can be increased.

The seam allowance W2 from the second stitch line 15 to the end of the skin material 10 is preferably 2 mm or less from the viewpoint of suppressing the opening of the stitched portion 11. The smaller the seam allowance W2 is, the more preferable it is from the viewpoint of suppressing the opening of the stitched portion 11, but 1 mm or more is preferable in consideration of the workability of the stitching. Further, the second stitch line 15 may be a straight stitch, but may be an overlock stitch in which the sewing thread rotates around the end of the skin material 10, and the overlock stitch can further suppress the opening of the stitched portion 11. Further, the seam allowance of the second stitch line 15 that mainly suppresses the opening of the stitch portion 11 can be made thinner than the seam allowance of the first stitch line 14 that secures the joint strength of the two skin materials 10, and the second stitch line 15 can be made thinner. If the sewing thread is thin, the seam allowance W2 from the second stitch line 15 to the end of the skin material 10 can be further reduced.

The adhesive 17 is not particularly limited, but for example, a hot melt adhesive can be used. 4 to 6 show an example of an adhesion method when the suture portion 11 is adhered to the bottom of the groove 16 using a hot melt adhesive.

As shown in FIG. 4, the hot melt adhesive 17 is pre-arranged in the grooves 16 of the cushion pads 4 and 6. The push plate 20 is attached to the sewn portion 11 from the front side of the trim covers 5 and 7 along the first stitch line 14 of the sewn portion 11. Then, the suture portion 11 is pushed into the groove 16 by the push plate 20. The push plate 20 is provided with a plurality of needle-shaped protrusions 21 at appropriate intervals in the longitudinal direction of the plate, and these protrusions 21 are sewn portions 11 from the front side to the back side of the trim covers 5 and 7. By penetrating the sewn portion 11, the sewn portion 11 and the pushing plate 20 are prevented from being displaced from each other.

As shown in FIG. 5, after the suture 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 arranged near the bottom of the groove 16. Then, high-temperature steam is ejected from the tip of the steam nozzle 22. The hot melt adhesive 17 in the groove 16 is melted by the high-temperature steam ejected. The melted hot melt adhesive 17 soaks into the cushion pads 4 and 6, and also soaks into the back surface of the end portion of the skin material 10 which is the adhesive surface of the suture portion 11, that is, the backing material 13 made of wading. Then, the hot melt adhesive 17 is cooled and solidified in a state of being soaked in the cushion pads 4 and 6 and the backing material 13. As a result, the suture portion 11 is adhered to the bottom of the groove 16.

Finally, as shown in FIG. 6, the push plate 20 is pulled out from the sewn portion 11, and the steam nozzle 22 is pulled out from the cushion pads 4 and 6.

Up to this point, the present invention has been described by taking the seat 1 mounted on 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 the present specification includes a trim cover in which a plurality of skin materials are sewn together, and a cushion pad covered by the trim cover. The sewn portion to which the skin materials of the sheets are sewn is pushed in, and the sewn portion to which the pushed portion is adhered has a groove, and the sewn portion has a first stitch line and the two sheets more than the first stitch line. It has a second stitch line provided on the terminal side of the skin material of the above.

Further, the vehicle sheet disclosed in the present specification has a seam allowance of 2 mm or less from the second stitch line to the terminal of the two skin materials.

Further, in the vehicle sheet disclosed in the present specification, the second stitch line is an overlock stitch in which the sewing thread rotates around the terminals of the two skin materials.

Further, in the vehicle sheet disclosed in the present specification, the sewing thread of the second stitch line is thinner than the sewing thread of the first stitch line.

Further, in the vehicle sheet disclosed in the present specification, the two skin materials include a surface material and a backing material bonded to the back surface of the surface material, and the backing material is the surface material. It is more porous than wood.

Further, in the vehicle seat disclosed in the present specification, 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 Seam allowance 12 Surface material 13 Backing material 14 1st stitch line 15 2nd stitch line 16 Groove 17 Adhesive W1 Seam allowance W2 Seam allowance

Claims (6)

A trim cover made by sewing multiple skin materials together,
The cushion pad covered by the trim cover and
With
The cushion pad has a groove in which a suture portion in which two skin materials are sewn together is pushed in and the suture portion into which the pushed portion is adhered is adhered.
The sutured part
The first stitch line and
The second stitch line provided on the terminal side of the two skin materials with respect to the first stitch line, and
Seat for vehicles with. The vehicle seat according to claim 1.
A vehicle sheet having a seam allowance of 2 mm or less from the second stitch line to the terminals of the two skin materials. The vehicle seat according to claim 1.
The second stitch line is a vehicle sheet in which the sewing thread is overlock stitched around the terminals of the two skin materials. The vehicle seat according to any one of claims 1 to 3.
The sewing thread of the second stitch line is a vehicle sheet thinner than the sewing thread of the first stitch line. The vehicle seat according to any one of claims 1 to 4.
The two skin materials are
Surface material and
The backing material joined to the back surface of the surface material and
Have,
The lining material is a vehicle sheet that is more porous than the surface material. The vehicle seat according to claim 5.
The surface material is a leather sheet for vehicles.

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