JP2016101324A - Vehicle seat and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to cope with accent lines having various shapes without loss of production efficiency.SOLUTION: A vehicle seat having an accent line formed thereon includes a seat cushion and a seat back each formed by covering the surface of a urethane pad with a seat cover. In the seat cover of either one of the seat cushion and the seat back, there is formed a part subjected to superimposed seaming. The part subjected to the superimposed seaming formed in the seat cover is fixed on the surface of the urethane pad with an adhesive without being partially embedded in the urethane pad. Thereby, the part subjected to the superimposed seaming is made to form the accent line.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vehicle seat such as a passenger car and a railway vehicle and a manufacturing method thereof, and more particularly to a vehicle seat having an accent line formed on a seat cover and a manufacturing method thereof.

  A seat cover for covering a seat back of a vehicle seat such as a passenger car or a railway vehicle and a cushion seat is provided with a step at a sewn portion of the seat side portion to improve the appearance of the seat.

  As a method for forming such a seat cover, Japanese Patent Application Laid-Open No. 2005-110946 (Patent Document 1) describes a method in which terminals are aligned and overlapped so that the surface sides of two skin materials face each other. In the structure of the seat cover formed by stitching and folding back one skin material, the back surface of one of the skin material is attached to the back surface of one terminal portion or the back surface of the terminal portion, and the back surface of the skin material folded back The structure locked to the position corresponding to is disclosed.

  Japanese Patent Laying-Open No. 2014-8320 (Patent Document 2) describes that two skin materials are stitched together and embedded in a groove formed in a seat back to form a seat cover.

JP 2005-110946 A JP 2014-8320 A

  For seat covers that cover vehicle seats such as passenger cars and railway vehicles, and cushion seats, for example, a line stitched with different types of seat cover materials is formed on the surface of the seat cover as an accent line. Has been processed to improve the texture.

  The accent line of the seat cover is required to be flat or concave without a convex step because the back or leg of a person sitting on the seat hits it.

  Furthermore, the accent line of the seat cover is not necessarily formed in a straight line, and may be posted on an elegant curve.

  In the method of forming the seat cover described in Patent Document 1, the stitched portions of the two skin materials appear as steps on the surface of the seat cover, and the back and legs of a person sitting on the seat hit the seat cover. There is no convex step, and the condition of flat or concave formation cannot be satisfied.

  On the other hand, in the method of forming the seat cover described in Patent Document 1, since the back and legs of a person sitting on the seat hits, it satisfies the condition that there is no convex step and the surface is formed flat or concave. I can. However, when the accent line is formed in a curved shape, a dedicated jig is required to embed a portion where two skins are stitched in a curved groove formed in the seat back. As a result, the embedding jig must be replaced every time the accent line has a different curved shape, and when forming various types of accent lines, it takes a lot of time to change the setting of the embedding jig. It becomes a bottleneck in raising the efficiency of.

  The present invention solves the above-described problems of the prior art, and provides a vehicle seat including a seat cover that can cope with accent lines of various shapes without reducing production efficiency, and a method for manufacturing the same. It is to provide.

In order to solve the above-described problems, in the present invention, a vehicle seat having an accent line is provided with a seat cushion and a seat back formed by covering the surface of a urethane pad with a seat cover. One of the seat covers has an over-sewed part, and the over-sewed part formed on the seat cover is not partially embedded in the urethane pad and fixed to the surface of the urethane pad with an adhesive. As a result, the stitched part formed an accent line.
In order to solve the above-described problems, in the present invention, in a vehicle seat having a seat cushion and a seat back and having an accent line formed, the seat cushion and the seat back cover the surface of the urethane pad with a seat cover. An accent line is formed on the seat cover of either the seat back or the seat cushion, and the accent line is stitched together with the portion where the seat covers are stitched together in three layers. The seat cover on which the accent line is formed and the urethane pad are fixed with an adhesive.
Furthermore, in order to solve the above-described problem, in the present invention, in the method of manufacturing a vehicle seat in which an accent line is formed, two seat covers are stacked with the skin material facing each other, and the two seat covers are stacked. 2 of the two seat covers stitched together near the end, and folded back at the stitched portion of one seat cover of the two seat covers stitched near the end, and stitched with the folded back sheet cover. An accent line is formed by stitching the seat cover closer to the end than the stitched part, and an adhesive is applied to the surface of the urethane pad of the vehicle seat, and an adhesive is applied to the surface. The urethane pad and the seat cover on which the accent line was formed were heated and pressed to attach the seat cover to the urethane pad.

  According to the present invention, the portion where the accent line is formed can be formed with the same thickness as the thickness of one seat cover, and the accent line is attached to the urethane pad by attaching the accent line portion to the urethane pad. Therefore, it is possible to easily form a vehicle seat in which an accent line is formed.

  In addition, it has become possible to easily manufacture a vehicle seat having various types of accent lines without replacing laborious production processes.

FIG. 1 is a perspective view of a passenger car seat in which an accent line is formed. FIG. 2 is a cross-sectional view showing the configuration of the seat cover. FIG. 3 is a flow diagram showing the overlap stitching process in the embodiment of the present invention, and a cross-sectional view showing the structure of the seat cover in each process of the flow. FIG. 4 is a perspective view of the urethane pad. FIG. 5 is a flowchart showing a process of attaching the seat cover to the urethane pad in the embodiment of the present invention. FIG. 6 is a perspective view of a seat back formed according to the embodiment of the present invention.

  The present invention adjusts the thickness of the over-sewed part by over-sewing the two skins after over-sewing the two skins of the seat cover of the vehicle seat and turning over one of the skins again. In addition, the thickness of the over-sewn portion and the other skin portion is formed to be substantially the same thickness. Thus, the seat back is adhered to the urethane pad and fixed without forming a groove in the urethane pad, which is an internal member of the seat back or the seat cushion, to form a seat back or seat cushion having an accent line. .

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows a basic configuration of a passenger car seat 1 which is a vehicle seat targeted in the present invention. The passenger car seat 1 includes a cushion seat 2, a seat back 3, a headrest 4, and a side support 5. An accent line 30 is formed on the cushion seat 2 and the seat back 3.

  FIG. 2 shows a cross-sectional configuration of the seat cover 10 used in the present invention. The seat cover 10 is formed of a skin material 11 on the front surface, a cushion material 12 formed of polyurethane underneath, and a back fabric 13 that covers the back surface of the cushion material 12. The skin material 11 and the back fabric 13 are bonded to the cushion material 12 with an adhesive. The skin material 11 is relatively hard compared to the cushion material 12. Therefore, when pressed from above, the thickness of the skin material 11 does not change, but the thickness of the cushion material 12 changes greatly. The backing fabric 13 is thinner than the skin material 11 and the cushion material 12, and the thickness hardly changes even when pressed from above.

  FIG. 3 shows a process of stitching two sheet covers 10-1 and 10-2 according to the present invention. First, in the two-sheet overlapping step of S301, the two sheet covers 10-1 and 10-2 are overlapped so that the skin materials 11-1 and 11-2 face (inside). Next, in the double overlap stitching step of S302, the two sheet covers 10-1 and 10-2 are stitched together at the portion A (single stitch). At this time, the cushion materials 12-1 and 12-2 are compressed around the stitched portion A, and the thickness of the portion A is reduced. On the other hand, on both sides of the portion A, the cushion material 12-2 has an original thickness. Next, in the upper folding process of S303, the upper seat cover 10-1 is folded from the stitched portion A. Thereby, the skin material 11-1 of the seat cover 10-1 becomes the top.

  Lastly, in the three-layer stitching process of S304, the sheet cover is stitched three times (press sewing) at the portion B with the upper sheet cover 10-1 folded back. At this time, since the uppermost side of the upper seat cover 10-1 is covered with the skin material 11-1, when the portion B is sewed in this state, the relatively hard skin material 11-1 is compared. The soft cushioning material 12-1 can be crushed to make the thickness of the stitched portion B the same as the thickness of one sheet of the seat cover 10-1 or 10-2.

  In this way, the thickness of the stitched portion can be made the same as the thickness of one sheet of the seat cover 10-1 or 10-2. It is no longer necessary to provide a groove for embedding the stitched portion in the urethane pad as in the case where the thickness is larger than the thickness of one sheet of No. 2.

  As a result, it becomes possible to attach the two sewn sheet covers on a flat urethane pad 31 as shown in FIG. 4 with a substantially flat surface, and form grooves in the urethane pad. Thus, it is not necessary to embed the stitched portion of the seat cover in the groove, and the process of attaching the seat cover to the urethane pad can be simplified. FIG. 4 shows an example of the urethane pad used for the seat back 3 as an example of the urethane pad 31.

  Next, the process of attaching the seat cover to the urethane pad to form the seat back is shown in FIG. First, the seat cover 10 sewed through the steps described with reference to FIG. 3 is put into the production line (S500), and the urethane pad 31 is put into the production line (S501). Next, an adhesive is applied to the surface of the urethane pad (S502). Next, the seat cover 10 is pressed (pressurized) against the urethane pad 31 and heated, and after a predetermined time has elapsed, the seat cover 10 is adhered and fixed to the urethane pad 31 by releasing the heating and pressurization (S503). ) The seat back 3 is formed, the formed seat back 3 is taken out from the line (S504), and the process is finished.

  The appearance of the seat back 3 formed in this way is shown in FIG. The surface of the seat back 3 is covered with the seat cover 10, and as described with reference to FIG. 3, two accent lines 35 formed by overlapping and sewing two seat covers (35-1 and 35-) are formed. 2) It is formed.

  According to this embodiment, the thickness of the stitched portion is made substantially equal to the thickness of one seat cover by sewing the three seat covers with the relatively hard skin material 11 as the uppermost surface. Can do. This eliminates the need to form a groove in the urethane pad and embed the stitched portion into the groove, and it is necessary to change the groove shape every time the accent line shape is different, and to prepare an embedding jig for each groove shape. The production process can be simplified.

  Also, in this embodiment, instead of eliminating the step of embedding the seat cover in the groove formed in the urethane pad, as a means for fixing the seat cover to the urethane pad, an adhesive is applied to the urethane pad and stitched thereon. I took the method of overlapping the seat cover. Thereby, since a special jig is not required in the production process, it is possible to easily cope with various urethane pad shapes and accent line shapes.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle seat 2 ... Cushion seat 3 ... Seat back 10, 10-1, 10-2 ... Seat cover 11, 11-1, 11-2 ... Skin material 12, 12 -1,12-2 ... cushion material 13, 13-1, 13-2 ... back fabric 31 ... urethane pad 35, 35-1, 35-2 ... accent line.

Claims (9)

A vehicle seat in which an accent line is formed,
Equipped with a seat cushion and seat back formed by covering the surface of the urethane pad with a seat cover,
The seat cover of either the seat cushion or the seat back is formed with a portion that is sewed over,
The over-sewn portion formed on the seat cover is fixed to the surface of the urethane pad without being partially embedded in the urethane pad, so that the over-sewn portion has an accent line. A vehicle seat having an accent line formed thereon.   The vehicle seat in which the accent line according to claim 1 is formed, wherein the accent line is formed by stitching three sheets of the seat cover. Sheet. A vehicle seat having a seat cushion and a seat back and having an accent line formed thereon,
The seat cushion and the seat back are formed by covering the surface of the urethane pad with a seat cover,
An accent line is formed on the seat cover of either the seat back or the seat cushion,
The accent line is formed to have a portion where the seat cover is sewn in two layers and a portion where the seat cover is sewn in three layers,
A seat for a vehicle having an accent line, wherein the seat cover on which the accent line is formed and the urethane pad are fixed with an adhesive.   4. The vehicle seat in which the accent line according to claim 1 or 3 is formed, wherein the accent line of the urethane pad is formed flat, and the accent line is formed. Vehicle seat.   It is the vehicle seat in which the accent line of Claim 1 or 3 was formed, Comprising: The part of the said accent line of the said seat cover is adhere | attached on the said urethane pad, without being embedded in the said urethane pad. A vehicle seat in which an accent line is formed. A vehicle seat manufacturing method in which an accent line is formed,
Stack the two sheet covers with the skin facing each other,
Sew the vicinity of the edges of the two sheet covers
One of the two seat covers stitched near the end portion is folded back at the stitched portion.
An accent line is formed by sewing the folded one sheet cover and the two stitched sheet covers together on the side closer to the end than the stitched portion,
Apply adhesive to the surface of the urethane pad of the vehicle seat,
A vehicle seat having an accent line formed by pressing the urethane pad having an adhesive applied to the surface and the seat cover having the accent line while heating and pressing the seat cover to the urethane pad. Manufacturing method.   The method of manufacturing a vehicle seat having an accent line according to claim 6, wherein in the step of forming the accent line, the folded one seat cover and the two stitched seat covers are combined. By sewing on the side closer to the end portion than the stitched portion, the thickness of the portion sewn on the side closer to the end portion is made substantially the same as the thickness of one sheet cover. A vehicle seat manufacturing method in which an accent line is formed.   The vehicle seat manufacturing method according to claim 6, wherein the accent line formed on the seat cover is attached to a flat portion of the urethane pad. A method for manufacturing a vehicle seat in which an accent line is formed.   The vehicle seat manufacturing method according to claim 6, wherein the accent line portion formed on the seat cover is embedded on the surface of the urethane pad without being embedded in the urethane pad. A method for manufacturing a vehicle seat in which an accent line is formed.

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