WO2017022558A1

WO2017022558A1 - Vehicle seat and method for producing same

Info

Publication number: WO2017022558A1
Application number: PCT/JP2016/071809
Authority: WO
Inventors: 秀樹鎌田; 文佐々木
Original assignee: 株式会社タチエス
Priority date: 2015-08-06
Filing date: 2016-07-26
Publication date: 2017-02-09
Also published as: JP6722430B2; JP2017030698A

Abstract

In order to make it possible to mold a cushion pad using fewer molds, and to connect a cushion pad and a surface cover base to one another by using fewer steps, the present invention provides a vehicle seat that has a seatback or seat cushion formed by covering the surface of a urethane pad with a trim cover, wherein the trim cover is formed by stitching multiple trim covers to one another, and the stitched sections of the trim cover are adhered to concavities in the urethane pad with an adhesive so as to align with the shape of the concavities.

Description

Vehicle seat and manufacturing method thereof

The present invention relates to a vehicle seat and a method for manufacturing the same.

As a prior art relating to a vehicle seat and a method for manufacturing the same, Patent Document 1 discloses a vehicle seat having a planar reversible cover and a planar bellows cover, the reversible cover covering the surface of the seat back, and its edge It is described that the surface fastener set to 1 is fixed to the seat back, and the bellows cover is configured to cover the surface fastener of the reversible cover to the outside.

Further, in Patent Document 2, a groove is formed in a pad body of a vehicle seat, a plurality of holes penetrating to the lower recess are provided in the groove, and a suspension piece formed on the back surface of the skin of the vehicle seat Insert the wire into the insertion part of the hanging piece with the wire extending through the through hole of the groove formed in the pad body, and in this state the fitting body is fitted into the recess of the pad and seated on the seat pad Fixing the epidermis is described.

JP 2012-116289 A JP 2007-54383 A

In the configuration described in Patent Document 1, a recessed surface is formed in a portion where the surface fastener is fixed to the cushion pad of the seat back, and the surface fastener fixed to the recessed portion and the surface fastener attached to the skin base are combined. The skin base is attached to the seat back.

However, in order to obtain such a configuration, a mold having a shape corresponding to the shape of the recess is required when the cushion pad is molded. When there are many types of dent shapes, a number of molds corresponding to the types must be prepared, and a large space is required for storing the cushion pad mold.

In addition, since the cushion pad and the skin base are fixed using the hook-and-loop fastener, there are a process of fixing the hook-and-loop fastener to the cushion pad and a process of fixing the hook-and-loop fastener to the skin base and the number of processes is large. It has become.

Further, in the configuration described in Patent Document 2, when the shape of the seat pad for fixing the seat skin is complicated and the design of the seat is changed, the seat pad may be the same even if the shape of the entire seat pad is the same. The position and shape for fixing the epidermis have changed, and it is necessary to prepare many types of seat pad forming molds.

In addition, the number of processes for fixing the seat skin to the seat pad is large, and a lot of work time is required.

In the present invention, it is possible to solve the above-mentioned problems of the prior art and to form a cushion pad using a smaller number of molds and to realize the connection between the cushion pad and the skin base with fewer steps. The present invention provides a vehicle seat and a method for manufacturing the same.

In order to solve the above-described problems, in the present invention, in a vehicle seat having a cushion seat or a seat back formed by covering the surface of a urethane pad with a trim cover, the trim cover is formed by stitching a plurality of trim covers. The stitched portion of the trim cover is bonded to the concave portion of the urethane pad with an adhesive along the shape of the concave portion.

In order to solve the above problems, in the present invention, in a vehicle seat having a cushion seat or a seat back formed by covering the surface of a urethane pad with a trim cover, the cushion seat or the seat back has a concave shape. An accent line is formed, and a concave portion is formed in the urethane pad portion corresponding to the concave accent line of the cushion seat or seat back, and the stitched portion of the trim cover is bonded to the bottom surface of the concave portion with an adhesive. It is characterized by being pasted.

Furthermore, in order to solve the above-described problems, according to the present invention, in the method for manufacturing a vehicle seat, the urethane pad is mounted while heating the stitched portion of the trim cover on the convex portion of the mold on which the convex portion is formed. By pressing the adhesive between the urethane pad and the stitched portion of the trim cover, the convex shape formed on the mold and the shape of the stitched portion are transferred to the urethane pad to form a concave portion on the urethane pad. I did it.

According to the present invention, the cushion pad can be molded using a smaller number of molds, and the connection between the cushion pad and the skin base can be realized with fewer processes.

It is a perspective view of the vehicle seat which concerns on Example 1 of this invention. FIG. 2 is a cross-sectional view taken along the line AA of FIG. It is sectional drawing of the urethane pad of the vehicle seat which concerns on Example 1 of this invention. It is sectional drawing of the stitching | suture part of the trim cover of the vehicle seat which concerns on Example 1 of this invention. It is a figure which shows the stitching | suture procedure of the trim cover of the vehicle seat which concerns on Example 1 of this invention, and is sectional drawing which shows the state which overlap | superposed and stitched | attached the trim cover of 2 sheets. It is a figure which shows the stitching | suture procedure of the trim cover of the vehicle seat which concerns on Example 1 of this invention, and shows the state which opened the left and right in the part which stitched two trim covers, and overlapped the stitched part and a state adhesive agent. It is sectional drawing. It is a figure which shows the stitching | suture procedure of the trim cover of the vehicle seat which concerns on Example 1 of this invention, and is sectional drawing which shows the state which sewn two trim covers and sheet-like hot-melt-adhesive in two places. . It is sectional drawing of the front of the lower mold | type for bonding together the urethane pad and trim cover of the vehicle seat which concern on Example 1 of this invention. It is a figure which shows the process of bonding the urethane pad and trim cover of the vehicle seat which concern on Example 1 of this invention, and is sectional drawing of the front surface of the lower mold | type which shows the state which mounted the trim cover in the lower mold | type. It is a figure which shows the process of bonding the urethane pad and trim cover of the vehicle seat which concern on Example 1 of this invention, and is using sheet-like adhesive for parts other than the stitching | suture part on the trim cover mounted in the lower mold | type. It is sectional drawing of the front of the lower mold | type which shows the state put. It is a figure which shows the process of bonding the urethane pad and trim cover of the vehicle seat which concern on Example 1 of this invention, and conveys a urethane pad above the lower mold | type which mounted the sheet-like adhesive agent on the trim cover It is a side view of the lower mold | type and urethane pad which show the state which has done. The lower mold | type which shows the process of bonding the urethane pad and trim cover of the vehicle seat which concern on Example 1 of this invention, and lowers the urethane pad and shows the state which the urethane pad started to hit the protrusion part of a lower mold | type It is sectional drawing of the front of a urethane pad. The lower mold | type which shows the process of bonding the urethane pad and trim cover of the vehicle seat which concern on Example 1 of this invention, and lowers the urethane pad and shows the state which the urethane pad started to hit the protrusion part of a lower mold | type It is sectional drawing of the front of a urethane pad. The figure which shows the process of bonding the urethane pad and trim cover of the vehicle seat which concern on Example 1 of this invention, the state which raised the urethane pad and the trim cover adhere | attached on the urethane pad, and removed from the lower mold | type It is sectional drawing of the front of the lower mold | type and urethane pad to show. It is a flowchart which shows the process of bonding the urethane pad and trim cover of the vehicle seat which concern on Example 1 of this invention. It is sectional drawing of the location in which the recessed part shape of the urethane pad and trim cover of the vehicle seat which concerns on Example 1 of this invention was formed. FIG. 6 is a view showing another example of the sewing procedure of the trim cover of the vehicle seat according to the first embodiment of the present invention, and shows a state in which two trim covers are stitched with their end faces slightly shifted and overlapped; FIG. Sectional view of a trim cover showing another example of a stitching procedure for a trim cover of a vehicle seat according to Embodiment 1 of the present invention, in which two stitched trim covers are folded and overlapped at a stitched portion FIG. It is a figure which shows another example of the sewing procedure of the trim cover of the vehicle seat which concerns on Example 1 of this invention, and is sectional drawing of a trim cover which shows the state which opened the uppermost trim cover to the other side. It is a figure which shows another example of the stitching | suture procedure of the trim cover of the vehicle seat which concerns on Example 1 of this invention, and is the state which opened the uppermost trim cover in the other side, and the remaining 3 sheets of the overlapping trim It is sectional drawing of the trim cover which shows the state which stitch | sutured the cover. The figure which shows the process of bonding the urethane pad and trim cover of the vehicle seat which concern on the modification 1 of Example 1 of this invention, and shows the state which has arrange | positioned the trim cover and the pushing jig above the urethane pad It is sectional drawing of the front of a cover and a urethane pad. The figure which shows the process of bonding the urethane pad and trim cover of the vehicle seat which concern on the modification 1 of Example 1 of this invention, and shows the state which pressed the trim cover against the urethane pad with the pressing jig, It is sectional drawing of the front of a urethane pad. It is a figure which shows the process of bonding the urethane pad and trim cover of the vehicle seat which concern on the modification 1 of Example 1 of this invention from the urethane pad side in the state which pressed the trim cover against the urethane pad with the pressing jig. It is sectional drawing of the front of a trim cover and a urethane pad which shows the state which is supplying high temperature steam. The figure which shows the process of bonding the urethane pad and trim cover of the vehicle seat which concern on the modification of Example 1 of this invention, and shows the state which raised the pushing jig | tool and stopped supply of high temperature water vapor | steam It is sectional drawing of the front of a cover and a urethane pad. It is a figure which shows the process of bonding the urethane pad and trim cover of the vehicle seat which concern on the modification 2 of Example 1 of this invention, and is a fragmentary sectional view of the urethane pad containing a recessed part and its periphery. It is a figure which shows the process of bonding the urethane pad and trim cover of the vehicle seat which concern on the modification 2 of Example 1 of this invention, and is a partial cross section of the urethane pad containing the recessed part of the state supplied with the adhesive agent, and its periphery FIG. The figure which shows the process of bonding the urethane pad and trim cover of the vehicle seat which concern on the modification 2 of Example 1 of this invention, and the part of the urethane pad containing the recessed part of the state in which the trim cover was bonded, and its periphery It is sectional drawing.

In the present invention, the seat back of the vehicle seat and the cushion seat are attached to the surface of the urethane pad formed of polyurethane by using an adhesive with a trim cover composed of an outer skin, a cover pad and a back base fabric. It was made to form.
The urethane pad used in this vehicle seat has a thermosetting property and has a property of shrinking and curing when heated. In the present invention, by utilizing this property, the adhesive is heated with a hot melt adhesive to bond the urethane pad and the trim cover, and the surface is molded with a flat surface by the heat at the time of bonding. By heating the urethane pad, the adhesive part was thermally shrunk and molded into a concave shape, thereby eliminating the need to mold various concave surfaces when molding the urethane pad.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a basic configuration of a passenger car seat (vehicle seat) 1 which is a vehicle seat targeted in the present invention. A passenger car seat (vehicle seat) 1 includes a cushion seat 2, a seat back 3, a headrest 4, and a side support 5. The surfaces of the cushion seat 2 and the seat back 3 are formed as

concave accent lines

210, 310, for example, concave lines stitched with different types of seat cover materials on the surface of the seat cover to improve the appearance of the seat. Processing to make it.

In the example shown in FIG. 1, the accent line 210 is formed on the cushion sheet 2 and the accent line 310 is formed on the seat back 3. However, the cushion sheet 2 may be formed only on one of them. And the accent line 2 formed by the seat back 3
The number, size, and shape of 10 and 310 may be different.

FIG. 2 shows an arrow view of the AA cross section of the seat back 3 shown in FIG. The cross section of the seat back 3 is formed by a urethane pad 31 and a trim cover 32 that covers the surface. The urethane pad 31 is formed with a concave groove (recess) 30 corresponding to the accent line 310, and the surface of the concave (recess) groove 30 is also covered with the trim cover 32. In the example shown in FIG. 2, the trim cover 32 is an example in which three trim covers 32-1, 32-2, and 32-3 are stitched together.

According to the conventional method as described in the background art section, the concave groove (recess) 30 corresponding to the accent line 310 is formed into a concave groove (recess) 30 when the urethane pad 31 is molded using a mold. The trim cover 32 is fixed to the urethane pad 31 by a method using a hook-and-loop fastener as described in the background art section or a method using a wire.

On the other hand, in this embodiment, the urethane pad 31 has a flat surface as shown in FIG. 3, and the trim cover 32 is attached in a state where the recess 30 is not formed. In the attaching process, the recess 30 is formed in the urethane pad 31 using a mold provided on the trim cover 32 side, and at the same time, the trim cover 32 is formed on the inner surface including the bottom surface of the recess 30.
Was to be pasted.

FIG. 4 shows a cross-sectional configuration of the trim cover 32 attached to the urethane pad 31. The trim cover 32 is configured by sewing three trim covers 32-1, 32-2, and 32-3. The three trim covers 32-1, 32-2, and 32-3 may have the same or different skin color, pattern, and material. Further, in the trim cover 32 shown in FIG. 4, a sheet-like hot melt adhesive 51 is formed at room temperature at the portions where the trim covers 32-1 and 32-2 and 32-2 and 32-3 are sewn together. Are sewn together.

A method for forming a stitched portion of the trim covers 32-1 and 32-2 surrounded by a circle B in FIG. 4 will be described with reference to FIGS. 5A to 5C.

First, as shown in FIG. 5A, the trim covers 32-1 and 32-2 are overlapped with their tip portions aligned. Here, as shown in the partial enlarged view on the right side, the trim cover 32-1 is attached to the outer skin 32-1.
1. It is composed of a cover pad 32-12 and a backing base fabric 32-13.
It is composed of an outer skin 32-21, a cover pad 32-22, and a back base fabric 32-23. FIG.
In the state shown in FIG. 4, the trim cover 32-1 has a skin 32-11 and the trim cover 32-2 so that the skin 32-21 faces each other, and the trim covers 32-1 and 32-2 have 61 positions. The stitched state is shown.

Next, as shown in FIG. 5B, the trim cover 32-1 and 32-2 are sewn to the left and right around the stitched portion 61, and the sheet-like hot melt adhesive 51 is placed on the opened lower portion. .

Next, as shown in FIG. 5C, the trim cover 32-1 and the sheet-like hot melt adhesive 51 are folded at a portion 62 that is folded back from the stitched portion 60 of the trim cover 32-1 and overlapped.
And stitch together. Similarly, the trim cover 32-2 and the sheet-like hot melt adhesive 51 are sewn together at the portion 63 that is folded back from the stitching portion 60 of the trim cover 32-2, and the sewing is completed. . Thus, the trim cover 32-1 and the trim cover 32
-2 are sewn at the overlapped

portions

62 and 63, respectively, so that the thickness of the overlapped portions can be reduced compared to a case where two pieces are simply overlapped without sewing. it can.

FIG. 6 shows a cross-sectional structure of a mold (lower mold) 40 provided on the trim cover 32 side. The lower mold 40 includes a pressing portion 41 and a heating portion 43, and the pressing portion 41 is formed with a protruding portion 42 for forming the shape of the recess 30 in the urethane pad 31. In addition, the heating unit 43 has an introduction hole 44 for introducing high-temperature water vapor from an external water vapor supply source (not shown), a passage 45 through which the introduced high-temperature water vapor is passed, and water vapor in the passage 45 is pressed against the heating unit 43. A supply hole 46 is provided to supply the back surface of the pressing portion 41, and the pressing portion 41 can be heated by high-temperature steam introduced from the outside.

The lower mold is made of a metal having high thermal conductivity (for example, stainless steel).

The shape of the surface of the pressing portion 41 (the upper surface in FIG. 6) is matched to the surface shape of the urethane pad 31 shown in FIG.

In the present embodiment, a plurality of trim covers 32-1, 32-2, 32 are provided on the lower mold 40 shown in FIG.
-3 and the hot melt adhesive 51 are sewn together, and the trim cover 32 is aligned with the stitching portion 60 so as to rest on the projection portion 42. Water vapor is supplied to heat the pressing portion 41, and the urethane pad 31 shown in FIG. 3 is pressed against the lower mold 40. Thus, the concave portion 30 is formed in the urethane pad 31 along the shape of the stitching portion 60, and the stitching portion 60 of the trim cover 32 is attached to the concave portion 30 with the sheet-like hot melt adhesive 51. .

The procedure for attaching the trim cover 32 to the surface of the urethane pad 31 according to this embodiment is as follows.
This will be described with reference to the flowcharts of FIGS. 7A to 7F and FIG.

First, as shown in FIG. 7A, a plurality of trim covers 3 are placed on the pressing portion 41 of the lower mold 40.
The trim cover 32 formed by stitching 2-1, 32-2, 32-3 together with the hot melt adhesive 51 is aligned so that the stitched portion 60 rests on the protruding portion 42 (S801).

Next, as shown in FIG. 7B, a sheet-like adhesive (hot melt adhesive) 52 is placed on a portion other than the stitched portion 60 on the trim cover 32 supplied on the pressing portion 41 (S802).
Next, as shown in FIG. 7C, the urethane pad 31 held by the upper mold 70 is placed on the upper part of the lower mold 40 by a conveying means (not shown) (S803).

In this state, high-temperature water vapor is introduced from an external water vapor supply source (not shown) into the passage 45 of the heating unit 43 of the lower mold 40 through the introduction hole 44 (S804). The high-temperature steam introduced into the passage 45 is supplied to the back surface of the pressing portion 41 through the many supply holes 46 to heat the pressing portion 41. Thereby, the projection part 42 formed in the pressing part 41 is also heated. The water vapor supplied to the back surface of the pressing unit 41 is discharged to the outside through a passage (not shown) formed between the back surface of the pressing unit 41 and the heating unit 43.

Next, the upper mold 70 arranged on the upper part of the lower mold 40 is moved in the direction of the arrow by means not shown.
(Descent) (S805).

When the upper mold 70 continues to descend, the urethane pad 31 is first moved to the lower mold 4 as shown in FIG. 7D.
It comes into contact with the stitched portion 60 of the trim cover 32 disposed on the upper portion of the zero protrusion 42. At this time, the protrusion 42 is heated by the high-temperature steam sent out from the heating part 43, and the urethane pad 31 contracts by heating the part in contact with the protrusion 42 via the stitching part 60 of the trim cover 32. (S806).

The upper die 70 continues to descend further, and the urethane pad 31 held by the upper die 70 is lowered and pressurized until it comes into full contact with the pressing portion 41 of the lower die 40 to be in the state shown in FIG. 7E (S8).
07). In this state, the urethane pad 31 and the trim cover 32 contract by being heated by the pressing portion 41 heated by high-temperature steam.

At the same time, the stitched portion 60 of the trim cover 32 is bonded to the urethane pad 31 by the heated hot melt adhesive 51, and the protruding portion 42 of the lower mold 40 and the stitched portion 60 of the trim cover 32 are bonded to the urethane pad 31. The corresponding shape is transferred, and the concave portion 30 corresponding to the shape of the protruding portion 42 and the stitched portion 60 of the trim cover 32 is formed (S808). At this time, the trim cover 32 is pulled by the protrusion 42 of the lower mold 40 and enters the recess 30 and is bonded to the urethane pad 31 by the hot melt adhesive 51. Therefore, the trim cover 32 is formed on the urethane pad 31. The surface is covered with a trim cover 32 including the stitching portion 60.

After pressing the urethane pad 31 with the upper mold 70 against the lower mold 40 heated with high-temperature steam for a predetermined time and securely bonding the entire surface covered with the trim cover 32 of the urethane pad 31 including the inner surface of the recess 30. Then, the supply of high-temperature steam to the heating unit 43 from an external steam supply source (not shown) is stopped (S809). As shown in FIG. 7F, in a state where the urethane pad 31 having the trim cover 32 bonded to the surface is held, the upper mold 70 is raised in the direction of the arrow to separate the urethane pad 31 from the lower mold 40 (S810). The urethane pad 31 is transported to a predetermined place by transport means (not shown) (S811), and a series of operations ends.

By undergoing such a process, the stitched portion 6 has a cross-sectional shape as shown in FIG.
The seat back 3 is formed by replacing 01 with the stitching portion 60.

FIG. 9 shows a cross-sectional view of the urethane pad 31 and the trim cover 32 in a portion where the recess 30 is formed. The urethane pad 31 is a lower mold 4 to which high-temperature water vapor is supplied when the trim cover is bonded.
A layer 312 that is heated and shrunk is formed on a portion close to the lower mold 40 by receiving heat from 0, that is, on the surface to which the trim cover 32 is bonded and in the vicinity thereof. Further, a layer 313 that is more contracted than the surroundings is formed at the bottom of the recess 30. On the other hand, a layer 311 that maintains the original state without being affected by heat is formed in a part away from the lower mold 40 to some extent.

In the above embodiment, the upper mold 70 has been lowered with respect to the lower mold 40, but conversely, the lower mold 40 is raised with respect to the upper mold 70 to form and bond the recess. You may do it.

In the above character command, the trim covers 32-1 and 32-2, and the trim cover 3
Although the stitching portions 60 of 2-2 and 32-3 have been described by forming them in the steps shown in FIGS. 5A to 5C, in this embodiment, the trim covers 32-1 and 32-2, and The method of stitching the trim covers 32-2 and 32-3 is not limited to this.

For example, the stitches may be sutured by the procedure shown in FIGS. 10A to 10D.
That is, the two trim covers 32-1 and 32-2 are overlapped as shown in FIG. 10A. At this time, the lower right end portion of the trim cover 32-2 which is on the lower side is retracted from the right end portion of the trim cover 32-1. The orientation of the trim covers 32-1 and 32-2 at this time is superior to the relationship shown in the enlarged view on the right side of FIG. 5A. In this state, trim cover 32-1
And 32-2 are sewn together at the stitching point 61.

Next, as shown in FIG. 10B, the right side of the stitched portion 61 is bent to the lower side on the left side of the stitched portion 61 around the stitched portion 61.

Next, as shown in FIG. 10C, the uppermost trim cover 32-1 is folded back around the stitched portion 61. Note that the stitched portion 601 of the trim cover 32 shown in FIG. 2 corresponds to the state shown in FIG. 10C.

Finally, as shown in FIG. 10D, three trim covers 32-1 and 32-2 are stitched together at the stitching point 64 where three trim covers 32-1 and 32-2 overlap. Part 6
A trim cover 320 having 02 is formed.

Using the trim cover 320 having the stitched portion 602 sewn in this manner, FIG.
In the procedure of bonding the trim cover 32 and the urethane pad 31 described with reference to FIG. 7F, the trim cover 32 is replaced with the trim cover 320, whereby the stitched portion 601 is replaced with the stitched portion 602 in the cross-sectional shape as illustrated in FIG. The replaced seat back 3 is formed.

According to this embodiment, when forming a concave shape on the urethane pad and attaching the trim cover to the surface, the molding process of the urethane pad alone is not required, and the urethane pad is molded and the trim cover is attached. It can be performed in one process, and the number of processes can be reduced.

In addition, since it is not necessary to mold the concave shape in advance on the urethane pad, it is not necessary to prepare a dedicated mold corresponding to the concave shape when forming the urethane pad, and the types of molds for forming the urethane pad can be reduced. It became so.
[Modification 1]
In the first embodiment, a sheet-like adhesive (hot melt adhesive) 52 is placed on the trim cover 32 other than the stitching portion 60, and the trim cover 32 is pressed by the pressing portion 41 of the lower mold 40.
-1,32-2 and 32-3 are heated to melt the sheet-like adhesive 52,
Although an example in which almost the entire trim covers 32-1, 32-2, and 32-3 are attached to the urethane pad 31 has been described, in this modification, a case in which only the recesses of the accent line are bonded will be described.

As described in the first embodiment, the portion along the concave shape of the accent line is formed in the stitched portion 60 in which the trim covers 32-1 and 32-2 shown in FIG. 5C are sewn together with the hot melt adhesive 51. Correspond. Therefore, in this modification, the trim covers 32-1 and 32-2 shown in FIG. 5C may be heated together with the hot melt adhesive 51 by pressing only the stitching portion 60 against the urethane pad 31.

The procedure for attaching the trim cover 32 to the urethane pad 31 in this modification will be described with reference to FIGS. 11A to 11D. In the example of FIG. 11A thru | or FIG. 11D, the case where it demonstrated using Example 7A thru | or FIG.
The vertical positional relationship of 2 is reversed.

First, in FIG. 11A, the trim cover 32 sewed according to the procedure described with reference to FIGS. 5A to 5C is positioned above the urethane pad 31, and the pushing jig 71 is further placed above the trim cover 32. It arranges according to the position of 60.

Next, as shown in FIG. 11B, the trim cover 32 is lowered by means not shown and placed on the urethane pad 31, and the stitching portion 60 of the trim cover 32 is pressed against the urethane pad 31 by the pressing jig 71. .

Next, as shown in FIG. 11C, from the back surface side of the urethane pad 31 (the lower surface side in FIG. 11C) with the stitching portion 60 of the trim cover 32 pressed against the urethane pad 31 with the pressing jig 71. The steam nozzle 81 is inserted into a hole formed in a urethane pad (not shown) by means not shown and inserted into the urethane pad 31. In this state, high-temperature steam 80 is supplied from the steam nozzle 81 to the inside of the urethane pad 31 through a supply pipe 82 from a steam supply source (not shown). Here, the steam nozzle 81 is provided so as to be positioned immediately below the stitching portion 60 of the trim cover 32, and the stitching portion 60 of the trim cover 32 is heated by the high-temperature steam 80 supplied from the steam nozzle 81. .

The sheet-like adhesive 52 of the stitching portion 60 heated by the supplied high-temperature steam 80 is melted, and the portion where the stitching portion 60 and the urethane pad 31 are in contact is bonded. At this time, the portion of the urethane pad 31 heated by the high-temperature steam with which the stitching portion 60 is pressed by the pressing jig 71 is compressed by the pressed stitching portion 60 and has a concave shape following the shape of the stitching portion 60. Transforms into

As a result, as shown in FIG. 11D, in the state where the pressing jig 71 is raised to release the pressing and the supply of the high-temperature steam 80 from the steam nozzle 81 is stopped, the urethane pad 31
A concave portion 301 is formed in accordance with the shape of the stitching portion 60, and a concave portion 301 having a shape in which the stitching portion 60 is accommodated is formed.

According to this modification, in addition to the effects described in the first embodiment, the pressing jig 71 can be formed in a relatively small size, and the manufacturing facility can be made relatively compact.
[Modification 2]
In Example 1, although the case where the groove | channel for the concave accent line 310 was not previously formed in the urethane pad 31 was demonstrated, as a modification 2 of Example 1, the urethane pad 3 is demonstrated.
A case where the groove for the accent line 310 is formed in advance will be described with reference to FIGS. 12A to 12C.

In this modification, as shown in FIG. 12A, a recess 301 for an accent line is formed when the urethane pad 31 is molded. In the step of attaching the trim cover 32 to the urethane pad 31, first, a liquid or stick-like adhesive 510 is supplied to the recess 301 as shown in FIG. 12B. Next, steps similar to those described in the first embodiment with reference to FIGS. 7B to 7F, that is, steps S802 to S811 in the flowchart illustrated in FIG. The trim cover 32 can be affixed to the urethane pad 31 as shown in FIG.

As an adhesive to be supplied to the recess 301, instead of the liquid or stick adhesive 510,
A spray-like adhesive may be supplied.
[Modification 3]
As a third modification of the first embodiment, in the step of stitching the two trim covers described in FIGS. 5A to 5C of the first embodiment, the sheet-like hot melt adhesive 51 is sewn together. First, sew only two trim covers.

In the bonding process between the urethane pad 31 and the trim cover 32, first, a liquid or stick-like adhesive is applied to the urethane pad 31 having a flat surface as shown in FIG. Supply. Next, FIGS. 7B to 7F of the first embodiment.
The trim cover 32 can be affixed to the urethane pad 31 by executing the steps as described in the above, that is, the steps S802 to S811 in the flowchart shown in FIG.

Also in this modification, as an adhesive supplied along a position corresponding to the accent line 310, a spray adhesive may be supplied instead of a liquid or stick adhesive.

DESCRIPTION OF SYMBOLS 1 ... Vehicle seat 2 ... Cushion seat 3 ... Seat back 2
10, 310 ... Accent line 30 ... Recess 31 ... Urethane pad
32 ... Trim cover 40 ... Lower mold 41 ... Pressing part 42 ...
Projection part 43 ... heating part 51 ... hot melt adhesive 60 ... stitching part
70 ... Upper mold

Claims

A vehicle seat having a cushion seat or a seat back formed by covering the surface of a urethane pad with a trim cover,
The trim cover is formed by stitching a plurality of trim covers.
The vehicle seat, wherein the stitched portion of the trim cover is bonded to the concave portion of the urethane pad with an adhesive along the shape of the concave portion.
The vehicle seat according to claim 1, wherein the stitched portion of the trim cover is pressed against the urethane pad in the same process as the bonding of the urethane pad and the trim cover to the cushion seat or the seat back. And a concave accent line is formed along the recess formed in the urethane pad.
2. The vehicle seat according to claim 1, wherein a sheet-like hot melt adhesive is sewn on a surface of the stitched portions of the plurality of trim covers. A vehicular seat having a recess formed by pressing simultaneously with heating while sandwiching an adhesive between the trim cover and the trim cover.
A vehicle seat having a cushion seat or a seat back formed by covering the surface of a urethane pad with a trim cover,
The cushion seat or seat back is formed with a concave accent line,
A portion of the urethane pad corresponding to the concave accent line of the cushion seat or seat back is formed with a recess, and a stitched portion of the trim cover is attached to the bottom surface of the recess with an adhesive. A vehicle seat characterized by that.
A method for manufacturing a vehicle seat, wherein a urethane pad is pressed with an adhesive sandwiched between a urethane pad and an adhesive while the stitched portion of a trim cover is placed on the convex portion of the mold formed with the convex portion and heated. A vehicle characterized by bonding a stitched portion of a trim cover to transfer the shape of the convex portion formed in the mold and the shape of the stitched portion to the urethane pad, thereby forming a concave portion in the urethane pad. Sheet manufacturing method.
6. The method of manufacturing a vehicle seat according to claim 5, wherein the surface of the urethane pad that is pressed against the mold in which the convex portion is formed has no recess corresponding to the concave portion and is formed flat. A method for manufacturing a vehicle seat, which is characterized.
6. The method of manufacturing a vehicle seat according to claim 5, wherein the adhesive is a sheet-like hot melt adhesive, and the sheet-like hot melt adhesive is stitched to the surface of the stitched portion of the trim cover. A method for manufacturing a vehicle seat.
6. The method of manufacturing a vehicle seat according to claim 5, wherein the adhesive is supplied to the surface of the urethane pad in accordance with the position of the stitched portion of the trim cover to be bonded. A method for manufacturing a vehicle seat.