Vehicle seat and method for manufacturing a vehicle seat

Abstract

Provided is a vehicle seat enabling formation of a pocket with a large capacity at the back surface of the seat without impairing the appearance of the vehicle seat.　The vehicle seat S comprises a pocket 30 at the back surface of a seat back 1. The pocket 30 has a sutured pocket part 34 and a pocket forming sheet 31, the pocket forming sheet 31 being overlapped with the outer surface of a back surface side skin material 20a positioned on the back surface of the seat back 1. The sutured pocket part 34 has: a first sutured part and second sutured part at the right and the left, the first and second sutured parts being formed at the positions sandwiching an opening 30a in the sheet width direction in order to form an opening 30a of the pocket at the upper end part of the pocket forming sheet 31; a third sutured part at the right and the left, the third sutured part forming right and left outer edge parts of the pocket 30a; and a fourth sutured part that forms the lower edge part of the pocket 30a. The second sutured part at the the right and the left is disposed inside of the third sutured part at the right and the left in the sheet width direction.

Description

Technical Field

[0001] The present invention relates to a vehicle seat and a method for manufacturing a vehicle seat, and more particularly to a vehicle seat having a pocket on the rear surface of a seat back and a method for manufacturing a vehicle seat.

Background Art

[0002] Conventionally, a vehicle seat having a seat back configured by placing a cushioning material on a back frame as a skeleton and covering it with a skin material is known. Among such vehicle seats, there are some in which a bag-shaped pocket that can store small items is formed by being attached by sewing to the outer surface of the back-side skin material located on the rear surface of the seat back (see, for example, Patent Documents 1 and 2).

[0003] The vehicle seat described in Patent Document 1 includes a pocket attached by sewing to the rear surface of the seat back. The pocket is formed to have a size that reaches both left and right end portions in the seat width direction of the seat back, and the opening of the pocket is also formed to be long so as to reach both left and right end portions of the seat back. Similarly, the vehicle seat described in Patent Document 2 includes a pocket attached by sewing to the rear surface of the seat back. The pocket is disposed at the central portion in the seat width direction of the seat back and is a pocket that is somewhat narrower in width than the seat back. Also, the opening of the pocket has a length corresponding to the size of the pocket.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, in the case of the pocket shape of a vehicle seat as in Patent Document 1, although the capacity can be relatively increased, since the opening of the pocket extends to both left and right ends of the seat back, not only does the closing of the opening deteriorate, but the appearance of the vehicle seat is not good, and there is a risk of impairing the design. Also, in the case of the pocket shape of a vehicle seat as in Patent Document 2, the opening of the pocket has a length corresponding to the size of the pocket, and although it does not impair the appearance of the vehicle seat, the capacity of the pocket becomes small, and there is a risk of being inferior in functionality. Therefore, when forming a pocket on the rear surface of a vehicle seat, there has been a demand for a technology capable of maximizing the capacity of the pocket without impairing the appearance of the vehicle seat.

[0006] Also, when forming a pocket on the rear surface of a vehicle seat, there has been a demand for a technology capable of forming the pocket relatively simply.

[0007] The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle seat and a method for manufacturing a vehicle seat capable of securing the capacity of a pocket without impairing the appearance of the vehicle seat when forming a pocket on the rear surface of the vehicle seat. Another object of the present invention is to provide a vehicle seat and a method for manufacturing a vehicle seat capable of forming the pocket simply when forming a pocket on the rear surface of the vehicle seat.

Means for Solving the Problems

[0008] According to the vehicle seat of the present invention, the above problem is solved by a vehicle seat provided with a pocket on the rear surface of a seat back, wherein the seat back has a skin material serving as a covering material for the seat back, and the pocket includes a sheet-shaped pocket forming member that is superposed on the outer surface of a rear surface side skin material located on the rear surface of the seat back, and a pocket stitching portion for attaching the pocket forming member in a state of being superposed on the rear surface side skin material. The pocket stitching portion is provided at the upper end portion of the pocket forming member to form an opening of the pocket, is formed at a position sandwiching the opening in the seat width direction, and includes left and right first stitching portions each extending in the seat width direction, left and right second stitching portions that are formed at positions sandwiching the opening in the seat width direction, are each connected to the left and right first stitching portions, and extend in a direction intersecting the left and right first stitching portions, left and right third stitching portions that are respectively formed at both end portions in the seat width direction of the pocket forming member to form left and right outer edge portions of the pocket and extend in the vertical direction, and a fourth stitching portion that is formed at the lower end portion of the pocket forming member to form a lower edge portion of the pocket and extends in the seat width direction. The left and right second stitching portions are disposed inside the left and right third stitching portions in the seat width direction.

[0009] With the above configuration, it is possible to realize a vehicle seat capable of ensuring the capacity of the pocket without impairing the appearance of the vehicle seat. Specifically, the pocket stitching portion is provided at the upper end portion of the pocket forming member to form an opening of the pocket, is formed at a position sandwiching the opening in the seat width direction, and includes left and right first stitching portions each extending in the seat width direction, and left and right second stitching portions that are formed at positions sandwiching the opening in the seat width direction, are each connected to the left and right first stitching portions, and extend in a direction intersecting the left and right first stitching portions. That is, the opening of the pocket is formed at the central portion in the seat width direction of the seat back and does not reach both left and right end portions of the seat back. Therefore, with such a shape of the opening, the appearance of the vehicle seat is not impaired. Further, the left and right second stitching parts located at positions sandwiching the opening of the pocket are arranged on the inner side in the sheet width direction than the left and right third stitching parts forming the left and right outer edge parts of the pocket. That is, the opening of the pocket is configured to be narrow in width and the accommodating part of the pocket is configured to be wide in width. Therefore, with such a shape of the opening, it is possible to secure (increase) the capacity of the pocket.

[0010] At this time, it is preferable that the left and right first stitching parts and the left and right second stitching parts are formed at the overlapping part in a state where a part of the surface of the pocket forming member is overlapped with the outer surface of the backside skin material, and the left and right third stitching parts and the fourth stitching part are formed at the folded-back part in a state where parts other than the overlapping part are folded back through the creases provided in the pocket forming member. With the above configuration, when forming a pocket on the rear surface of the vehicle seat, the stitching line can be made as inconspicuous as possible, and the design property can be ensured. Further, the pocket can be manufactured by a relatively simple manufacturing method.

[0011] At this time, the pocket has a plate-like plate member attached to a position corresponding to the opening in the pocket forming member and extending in the sheet width direction along the opening, and the plate member is arranged between the left and right second stitching parts in the sheet width direction and is arranged at a position not intersecting with the left and right second stitching parts. With the above configuration, the strength of the opening and the periphery of the opening of the pocket can be increased, and the functionality of the pocket can be enhanced. Further, by having the plate member, it becomes easier to form the pocket.

[0012] At this time, the pocket has a plate stitching part for attaching the plate member to the pocket forming member, the plate stitching part extends in the sheet width direction along the extending direction of the plate member, and it is preferable that the plate stitching part intersects with the left and right second stitching parts. With the above configuration, the sewing strength around the opening of the pocket can be increased. That is, the sewing strength of the first sewing part and the second sewing part can be increased.

[0013] At this time, it is preferable that the left and right second sewing parts extend in directions substantially orthogonal to the left and right first direction parts respectively. With the above configuration, when the occupant uses the pocket (when putting a hand into the pocket), it is possible to avoid interfering with the second sewing part as much as possible.

[0014] At this time, the second sewing part preferably has a first extending part extending in a direction intersecting with the first sewing part, and a second extending part connected to the first extending part and extending outward in the sheet width direction from the first extending part in a direction intersecting with the first extending part. Also, the second extending part of the second sewing part preferably extends in a direction inclined with respect to the first sewing part. Also, the second extending part of the second sewing part preferably extends outward in the sheet width direction so as to be away from the first sewing part. With the above configuration, the sewing strength of the opening of the pocket and the periphery of the opening (both left and right ends of the opening) can be further increased. Also, with the above configuration, it is possible to avoid interfering with the second sewing part when the occupant puts small items into the pocket or takes small items out of the pocket.

[0015] The above problem is also solved by a method for manufacturing a vehicle seat having a pocket on the rear surface of a seat back, the method including a step of manufacturing the pocket. In the step of manufacturing the pocket, a sheet-like pocket forming member is superposed on the outer surface of a back-side skin material that is disposed on the rear surface of the seat back among skin materials serving as a covering material for the seat back, and the pocket forming member is attached to the back-side skin material by a pocket sewing portion in a state where the pocket forming member is superposed. When attaching the pocket forming member, left and right first sewing portions that are provided at an upper end portion of the pocket forming member to form an opening of the pocket, are formed at positions sandwiching the opening in the seat width direction, and each extend in the seat width direction; left and right second sewing portions that are formed at positions sandwiching the opening in the seat width direction, are respectively connected to the left and right first sewing portions, and extend in a direction intersecting with the left and right first sewing portions; left and right third sewing portions that are respectively formed at both end portions in the seat width direction of the pocket forming member to form left and right outer edge portions of the pocket, and extend in the vertical direction such that the left and right second sewing portions are disposed inside in the seat width direction; and a fourth sewing portion that is formed at a lower end portion of the pocket forming member to form a lower edge portion of the pocket, and extends in the seat width direction, are used to attach the pocket forming member.

[0016] At this time, when attaching the pocket forming member, the superposed portion is attached by the left and right first sewing portions and the left and right second sewing portions in a state where a part of the surface of the pocket forming member is superposed on the outer surface of the back-side skin material, and the folded-back portion other than the superposed portion is further attached by the left and right third sewing portions and the fourth sewing portion in a state where the folded-back portion is folded back through a fold provided in the pocket forming member, which is preferable.

Advantages of the Invention

[0017] According to the present invention, it is possible to realize a vehicle seat capable of securing the capacity of a pocket without impairing the appearance of the vehicle seat. Specifically, the opening of the pocket is formed at the central portion in the seat width direction of the seat back and does not reach both left and right ends of the seat back. Therefore, with such a shape of the opening, the appearance of the vehicle seat is not impaired. Also, the opening of the pocket is configured to be narrow in width and the accommodating portion of the pocket is configured to be wide in width. Therefore, with such a shape of the opening, it is possible to secure (increase) the capacity of the pocket. Also, according to the present invention, the stitching line can be made as inconspicuous as possible, and the design property can be ensured. Further, the pocket can be manufactured by a relatively simple manufacturing method. Also, according to the present invention, the strength of the opening of the pocket and the periphery of the opening can be increased, and the functionality of the pocket can be enhanced. Further, it becomes easier to form the pocket. Also, according to the present invention, the stitching strength around the opening of the pocket can be increased. Also, according to the present invention, when a passenger uses the pocket (when putting a hand into the pocket), it is possible to avoid interference with the second stitching portion. Also, according to the present invention, the stitching strength of the opening of the pocket and the periphery of the opening (both left and right ends of the opening) can be further increased. Further, when a passenger puts small items into the pocket or takes small items out of the pocket, it is possible to avoid interference with the second stitching portion.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3A

Figure 3B

Figure 3C

Figure 3D

Figure 4A

Figure 4B

Figure 4C

Figure 4D

Figure 5

Figure 6A

Figure 6B

Figure 7

MODE FOR CARRYING OUT THE INVENTION

[0019] Hereinafter, embodiments according to the present invention will be described with reference to FIGS. 1-7. This embodiment is a vehicle seat provided with a pocket on the rear surface of the seat back. The pocket has a sheet-like pocket forming member superposed on the outer surface of the back skin material located on the rear surface of the seat back, and a pocket sewing part. The pocket sewing part is provided at the upper end part of the pocket forming member to form an opening of the pocket, and has left and right first sewing parts formed at positions sandwiching the opening in the seat width direction, left and right second sewing parts formed at positions sandwiching the opening and extending in a direction intersecting the left and right first sewing parts, left and right third sewing parts forming the left and right outer edge parts of the pocket, and a fourth sewing part forming the lower edge part of the pocket. The left and right second sewing parts are mainly characterized in that they are arranged inside the left and right third sewing parts, and relates to the invention of a vehicle seat. Note that the side where the occupant sits with respect to the seat back of the vehicle seat is the front side of the seat.

[0020] As shown in FIG. 1, the vehicle seat S of the present embodiment is a vehicle seat, and mainly includes a seat body including a seat back 1, a seat cushion 2, and a headrest 3, a pocket 30 attached to the rear surface of the seat back 1, and a sheet-like seat heater 40 attached to the inside of the seat body.

[0021] As shown in FIGS. 1 and 2, the seat back 1 is a backrest portion that supports the back of the seated person from behind, and is configured by placing a cushion material 10 on a back frame (not shown) serving as a skeleton and covering it with a skin material 20. The seat back 1 is composed of a central portion 1A in the central portion in the seat width direction and left and right side portions 1B (side bolster portions) outside the central portion 1A in the seat width direction. On the surface of the cushion material 10, left and right skin hanging grooves 10a extending in the vertical direction are formed so as to divide the central portion 1A and the left and right side portions 1B. A bag-shaped pocket 30 capable of storing small items and the like is attached to the rear surface of the seat back 1 by sewing.

[0022] As shown in FIG. 1, the seat cushion 2 is a seating portion that supports the seated person from below, and is configured by placing a cushion material 2a on a cushion frame (not shown) serving as a skeleton and covering it with a skin material 2b. Similarly, the seat cushion 2 is composed of a central portion 2A in the central portion in the seat width direction and left and right side portions 2B (side bolster portions) outside the central portion 2A in the seat width direction. On the surface of the cushion material 2a, left and right skin hanging grooves 2aa extending in the vertical direction are formed so as to divide the central portion 2A and the left and right side portions 2B. The headrest 3 is a headrest that supports the occupant's head from the rear, and is configured by placing a cushion material 3a on a headrest pillar (not shown) serving as a core material and covering it with a skin material 3b.

[0023] The cushion material 10 is a pad member made of foamed urethane or the like. The skin material 20 is made of a resin material (e.g., TPO), fabric (e.g., PET material), genuine leather, etc., and is formed into a shape capable of covering the cushion material 10 from the outside. In the above configuration, as shown in FIG. 1, a seat heater 40 is attached between the cushion material 10 and the skin material 20 in the seat back 1. Note that a seat heater 40 is also attached between the cushion material 2a and the skin material 2b in the seat cushion 2.

[0024] As shown in FIGS. 2, 3A - 3D, the pocket 30 is a bag-shaped pocket (back pocket) formed in the lower part of the rear surface of the seat back 1, and has an opening 30a at its upper end. The pocket 30 has a sheet-like pocket forming sheet 31 (pocket forming member) that is overlapped on the outer surface of the back side skin material 20a located on the rear surface of the seat back 1, and a plate-like plate member 32 that is attached at a position corresponding to the opening 30a in the pocket forming sheet 31. Also, as shown in FIG. 3A, the pocket 30 has a plate stitching portion 33 for attaching the plate member 32 to the pocket forming sheet 31, and a pocket stitching portion 34 for attaching the pocket forming sheet 31 to the back side skin material 20a in a state where they are overlapped, as shown in FIGS. 3B - 3D.

[0025] The pocket forming sheet 31 is formed from a sheet-like material similar to the skin material 20, and is a substantially rectangular sheet for forming the pocket 30. As shown in FIG. 3A, a plate-like plate member 32 that is long in the seat width direction is attached to one end portion in the vertical direction on the back surface of the pocket forming sheet 31.

[0026] The plate member 32 is a reinforcing member that increases the strength of the opening 30a of the pocket 30, and is formed from a resin material having a predetermined hardness and elasticity. As shown in FIG. 3D, the length of the plate member 32 corresponds to the length of the opening 30a of the pocket 30. The plate stitching portion 33 extends along the extending direction of the plate member 32, and extends to positions reaching both left and right ends of the pocket forming sheet 31 across the plate member 32 in the sheet width direction. Note that the plate stitching portion 33 and the pocket stitching portion 34 are stitching portions formed by a stitching operation using, for example, a known automatic sewing machine (XY automatic sewing machine).

[0027] As shown in FIGS. 3B and 3D, the pocket stitching portion 34 forms the upper edge portion of the pocket 30 and includes left and right first stitching portions 34a and second stitching portions 34b that form (partition) the opening of the pocket 30, left and right third stitching portions 34c that form the left and right outer edge portions of the pocket 30, and a fourth stitching portion 34d that forms the lower edge portion of the pocket 30. As shown in FIG. 3B, the left and right first stitching portions 34a and second stitching portions 34b are formed at the overlapped portion in a state where the surface of the pocket forming sheet 31 is partially overlapped with the outer surface of the back surface skin material 20a. On the other hand, as shown in FIGS. 3B to 3D, the left and right third stitching portions 34c and the fourth stitching portion 34d are formed at the folded-back portion in a state where an upper portion (a portion different from the overlapped portion) other than the overlapped portion through the fold line 35 provided in the pocket forming sheet 31 is folded back.

[0028] As shown in FIG. 3B, the left and right first stitching portions 34a are formed at positions sandwiching the opening 30a in the sheet width direction and each extend in the sheet width direction. Specifically, the left and right first stitching portions 34a are arranged at a height position overlapping the plate member 32 in the vertical direction, and extend substantially linearly from both left and right ends of the pocket forming sheet 31 to positions close to the plate member 32. Note that, as shown in FIG. 3D, in this embodiment, it is arranged at a position where the first stitching portion 34a and the fold line 35 overlap.

[0029] The left and right second stitching portions 34b are each continuously formed from the extending end portions of the left and right first stitching portions 34a, are formed at positions sandwiching the opening 30a in the sheet width direction, and extend in a direction intersecting the left and right first stitching portions 34a. Specifically described, the left and right second stitching portions 34b extend in a direction substantially orthogonal to the first stitching portion 34a. Specifically, they extend downward from the extending end portions of the first stitching portion 34a and reach one end portion in the vertical direction of the pocket-forming sheet 31. Note that the left and right first stitching portions 34a and second stitching portions 34b are arranged at positions that do not intersect the plate member 32.

[0030] As shown in FIG. 3D, the left and right third stitching portions 34c are respectively formed at both left and right end portions in the sheet width direction of the pocket-forming sheet 31 and extend in the vertical direction in a long shape. Note that the upper end portions of the left and right third stitching portions 34c extend to positions slightly protruding from the upper end portion of the pocket-forming sheet 31. The fourth stitching portion 34d is formed at the lower end portion of the pocket-forming sheet 31, extends in a long shape in the sheet width direction, and connects the left and right third stitching portions 34c. In the above configuration, specifically when attaching the pocket 30, the stitching operation starts from the upper end portion of the left third stitching portion 34c, and the stitching proceeds continuously to the left third stitching portion 34c, the fourth stitching portion 34d, and the right third stitching portion 34c, and the stitching operation is completed when reaching the upper end portion of the right third stitching portion 34c. Note that, conversely, the stitching operation may also start from the upper end portion of the right third stitching portion 34c.

[0031] With the above configuration, as shown in FIGS. 2 and 3D, the opening 30a of the pocket 30 is formed at the central portion in the sheet width direction of the seat back 1 and does not reach both left and right ends of the seat back 1. Therefore, with such a shape of the opening 30a, the closure of the opening 30a can be improved without impairing the appearance of the vehicle seat S.

[0032] Also, in the above configuration, as shown in FIG. 3D, the left and right second stitching portions 34b are disposed inside the left and right third stitching portions 34c in the sheet width direction. That is, the opening 30a of the pocket 30 is configured to be narrow in the sheet width direction, and the accommodating portion of the pocket 30 is configured to be wide. Therefore, with such a shape of the opening 30a, it is possible to increase the capacity of the pocket 30.

[0033] Also, in the above configuration, as shown in FIG. 3D, the plate stitching portion 33 extends in the sheet width direction along the extending direction of the plate member 32 and intersects the left and right second stitching portions 34b. Therefore, the stitching strength around the opening 30a of the pocket 30 can be increased. That is, the stitching strengths of the first stitching portion 34a and the second stitching portion 34b can be increased.

[0034] <Method for manufacturing a vehicle seat> Next, among the steps of the method for manufacturing the vehicle seat S, the step of manufacturing the pocket 30 will be described based on FIGS. 3A-3D. The method for manufacturing the vehicle seat S includes, for example, a step of manufacturing a seat body and a step of manufacturing the pocket 30 on the rear surface of the seat body (seat back 1).

[0035] In the process of manufacturing the pocket 30, first, in the skin material 20 of the seat back 1, a "first operation" is performed in which the pocket forming sheet 31 is superposed on the outer surface of the back side skin material 20a disposed on the rear surface of the seat back 1. Then, a "second operation" is performed in which the pocket forming sheet is attached by the pocket stitching portion 34 in a state where the pocket forming sheet is superposed on the back side skin material 20a.

[0036] Specifically, in the "second operation", the left and right first stitching portions 34a and the left and right second stitching portions 34b that are provided to form the opening 30a of the pocket 30 at the upper end portion of the pocket forming sheet 31 and are formed at positions sandwiching the opening 30a in the sheet width direction, and the left and right third stitching portions 34c respectively formed at both left and right end portions of the pocket forming sheet 31 to form the left and right outer edge portions of the pocket 30, and the fourth stitching portion 34d formed at the lower end portion of the pocket forming sheet 31 to form the lower edge portion of the pocket 30 are used to attach the pocket forming sheet 31. More specifically, in the "second operation", with a part of the surface of the pocket forming sheet 31 partially superposed on the outer surface of the back side skin material 20a, the superposed portion is attached by the left and right first stitching portions 34a and the left and right second stitching portions 34b. Then, with the portion other than the superposed portion folded back through the fold 35 provided on the pocket forming sheet 31, the folded-back portion is further attached by the left and right third stitching portions 34c and the fourth stitching portion 34d.

[0037] By the above manufacturing method, it is possible to realize a manufacturing method of a vehicle seat capable of securing the capacity of the pocket without impairing the appearance of the vehicle seat. In addition, it is possible to realize a manufacturing method of a vehicle seat capable of simply forming the pocket.

[0038] <Second Embodiment of Pocket> Next, the pocket 130 of the second embodiment will be described based on FIGS. 4A-4D. Note that the description of the content overlapping with the above-described pocket 30 will be omitted. Compared with the pocket 30, the configuration of the pocket stitching portion 134 of the pocket 130 is mainly different.

[0039] The pocket 130 has an opening 130a at its upper end, and is mainly composed of a pocket forming sheet 131, a plate-shaped plate member 132, a plate stitching portion 133, and a pocket stitching portion 134. The pocket forming sheet 131 is a substantially rectangular sheet, and left and right sheet pieces 131a are formed at the corners of both left and right end portions of the pocket forming sheet 131 so as to protrude partially from the main body of the pocket forming sheet 131. As shown in FIG. 3A, a plate-shaped plate member 132 that is long in the sheet width direction is attached to one end portion in the vertical direction on the back surface of the pocket forming sheet 131.

[0040] The pocket stitching portion 134 has left and right first stitching portions 134a and second stitching portions 134b that form the opening 130a of the pocket, left and right third stitching portions 134c that form the left and right outer edge portions of the pocket 130, and a fourth stitching portion 134d that forms the lower edge portion of the pocket 130.

[0041] The second stitching portion 134b has a first extension portion 134ba that extends in a direction (downward direction) orthogonal to the first stitching portion 134a, and a second extension portion 134bb that is continuous from the extension end portion of the first extension portion 134ba and extends while inclining downward toward the outside in the sheet width direction. The second extension portion 134bb extends in a direction inclined with respect to the first stitching portion 134a. Specifically, it extends while inclining downward toward the outside in the sheet width direction so as to be away from the first stitching portion 134a. The second extension portion 134bb is formed so as to extend along the outer edge of the sheet piece 131a of the pocket forming sheet 131. With the above configuration, the opening 130a of the pocket 130 and the stitching strength around the opening 130a can be further enhanced. Also, when a passenger puts small items into the pocket 130 or takes small items out of the pocket 130, interference with the first stitching portion 134a and the second stitching portion 134b can be avoided.

[0042] Even in the above-described second embodiment, when forming a pocket on the rear surface of the vehicle seat, the appearance of the vehicle seat is not impaired, and the capacity of the pocket can be secured. Also, the pocket can be formed simply.

[0043] <Details of the seat heater> Next, the seat heater 40 will be described in detail with reference to FIGS. 5 to 7. The seat heater 40 of the present embodiment is mainly characterized in that it is attached to the skin material 20 integrated with the cotton-like padding material 21 by only stitching the padding material 21 by a pick stitch so that the stitching line is not exposed.

[0044] Regarding the prior art, as disclosed in International Publication No. 2014 / 091710, there is known a seat heater in a sheet form that is attached by stitching to a skin material with a cotton-like padding material. The seat heater is stitched to the skin material, and the stitching line is exposed on the outer surface of the skin material. Therefore, it affects the appearance of the vehicle seat and may impair the design. Alternatively, in order to make the stitching line as inconspicuous as possible, the stitching line was made to coincide with the forming line (joint) of the skin suspension groove. Therefore, an object is to provide a vehicle seat having a seat heater in a sheet form, which can suitably attach the seat heater to the skin material without impairing the appearance of the vehicle seat.

[0045] FIG. 5 is a view showing a state in which the seat heater 40 is attached to the back surface of the skin material 20 with the padding material 21 by a pick stitch. On the back surface of the skin material 20, a cotton-like padding material 21 (slab material) is attached over substantially the entire surface by an adhesive. Note that it is not limited to an adhesive and may be attached, for example, by sewing.

[0046] As shown in FIGS. 1 and 5, the seat heater 40 is a sheet-like heating element (surface heating element) that warms the seat body, and as shown in FIG. 1, it is installed inside the seat back 1 and is disposed between the cushion material 10 and the skin material 20. Note that the seat heater 40 is also installed inside the seat cushion 2. Hereinafter, the seat heater 40 attached to the seat back 1 will be described.

[0047] The seat heater 40 is mainly composed of a rectangular central heater 40a disposed at the central portion 1A of the seat back 1 and side heaters 40b and 40c disposed at the left and right side portions 1B. The seat heater 40 mainly includes a sheet-like seat base material 41, electric wires 42 respectively attached on the seat base material 41 and connected to a power source (not shown), heater wires 43 connected to the electric wires 42, a temperature measurement sensor (thermistor, not shown) connected to the electric wires 42, and a temperature adjustment device (thermostat, not shown) connected to the electric wires 42. At the lower end portion of the seat heater 40, the electric wires 42, heater wires 43, temperature measurement sensor, and temperature adjustment device are densely arranged, and a cover member 44 that covers these components is attached.

[0048] The electric wire 42 supplies electricity from a power source (not shown) to the heater wire 43, temperature measurement sensor, and temperature adjustment device. At one end portion of the electric wire 42, a harness 42a is formed by bundling a plurality of electric wires 42. One end portion of the harness 42a is attached on the seat base material 41, and the other end portion extends so as to protrude from the seat base material 41 and is connected to the power source and the control device.

[0049] The center heater 40a is attached to the back surface of the skin material 20 with the wadding material 21 by a heater stitching portion 45. As shown in FIGS. 5 and 6A, the heater stitching portion 45 is a stitching portion formed by scooping and stitching the center heater 40a and the wadding material 21 of the skin material 20, and is formed by, for example, an automatic sewing machine (XY automatic sewing machine). Specifically, the heater stitching portion 45 includes a first stitching portion 45a that stitches the upper end portion of the center heater 40a, a second stitching portion 45b that stitches the lower end portion of the center heater 40a, and left and right third stitching portions 45c that stitch the left and right end portions of the center heater 40a. Note that the heater stitching portion 45 (particularly the second stitching portion 45b) is formed at a position avoiding the electric wire 42 and the heater wire 43 on the sheet base material 41, and extends linearly respectively.

[0050] Similarly, the side heater 40b (40c) is also attached to the back surface of the skin material 20 with the wadding material 21 by a heater stitching portion 46 (scooping stitch). The heater stitching portion 46 includes a first stitching portion 46a that stitches the upper end portion of the side heater 40b and a second stitching portion 45b that stitches the lower end portion of the side heater 40b. Note that the first stitching portion 46a extends linearly along the sheet width direction, and the second stitching portion 46b is disposed on the left and right while avoiding the electric wire 42 and the heater wire 43, and is formed in a substantially L shape.

[0051] In the above configuration, as shown in FIG. 5, the first stitching portion 45a and the second stitching portion 45b of the heater stitching portion 45 extend so as to intersect the left and right third stitching portions 45c respectively. Therefore, the center heater 40a can be firmly attached to the skin material 20 (wadding material 21). In particular, since the stitching line is not exposed by adopting the scooping stitch, the heater stitching portion 45 can be formed in a free arrangement as compared with the conventional case. For example, as in the present embodiment, it becomes possible to form the heater stitching portion 45 inside the sheet width direction rather than the left and right skin material suspension grooves 10a.

[0052] Also, in the above configuration, as shown in FIG. 5, by adopting a scoop stitch, the side heaters 40b and 40c can be attached to the skin material 20 (padding material 21) by a simple sewing operation using the first stitching portion 45a and the second stitching portion 45b. That is, it is possible to eliminate the need to align the stitching line of the heater stitching portion 46 and the formation line of the skin suspension groove 10a as in the conventional case.

[0053] Also, in the above configuration, in addition to the attachment structure shown in FIG. 6A, the attachment structure shown in FIG. 6B can also be adopted. In FIG. 6B, a padding material 21 is attached to the back surface of the skin material 20, and a back surface material 22 having a higher elastic modulus (harder) than the padding material 21 is further attached to the back surface of the padding material 21. The back surface material 22 is, for example, nylon half or circular knit, and is attached to the back surface of the padding material 21 by an adhesive or the like. And the seat heater 40 is attached so as to be stitched only to the back surface material 22 by a scoop stitch with respect to the skin material 20 in which the padding material 21 and the back surface material 22 are integrated. By stitching as described above, the stitching line is not exposed, and the seat heater 40 can be firmly attached. Note that the seat heater 40 may be attached so as to be stitched to the padding material 21 and the back surface material 22 by a scoop stitch.

[0054] Also, in the above configuration, as shown in FIG. 7, one end portion (lower end portion) in the vertical direction of the seat base material 41 is formed to be narrower in width than the main body portion of the seat base material 41. By doing so, with the second stitching portion 45b as the fold line, the lower end portion of the seat heater 40 can be easily folded back. Therefore, the attachment work of each component of the seat heater 40 (electric wire 42, heater wire 43, temperature measurement sensor, temperature adjustment device) can be easily performed. Further, by folding back the lower end portion of the seat heater 40, it is possible to easily check the attachment position of each component and confirm that there is no abnormality.

[0055] <Other Embodiments> In the above embodiment, as shown in FIG. 3C, the pocket 30 is formed by folding the pocket-forming sheet 31 once, but it is not particularly limited, and it is not necessarily required to fold it to form the pocket 30.

[0056] In the above embodiment, as shown in FIG. 3A, by attaching the plate-shaped plate member 32 to the pocket-forming sheet 31, the strength of the opening 30a of the pocket 30 is increased, but it is not particularly limited, and the plate member 32 does not necessarily need to be attached.

[0057] In the above embodiment, as a specific example, a vehicle seat used in an automobile has been described, but it is not particularly limited, and in addition to vehicle seats for trains, buses, etc., it can also be used as vehicle seats for airplanes, ships, etc.

[0058] In this embodiment, the vehicle seat according to the present invention and the manufacturing method of the vehicle seat have been mainly described. However, the above embodiment is merely an example for facilitating the understanding of the present invention and does not limit the present invention. The present invention can be changed and improved without departing from its gist, and it goes without saying that the equivalents of the present invention are included therein.

Explanation of Reference Numerals

[0059] S Vehicle seat 1 Seat back 1A, 2A Central portion 1B, 2B Side portion 2 Sheet Cushion 2a, 3a Cushion Material 2aa Epidermis Suspension Groove 2b, 3b Epidermis Material 3 Headrest 10 Cushion Material 10a Epidermis Suspension Groove 20 Epidermis Material 20a Back - side Epidermis Material 21 Wadding Material 22 Back Material 30, 130 Pocket 30a, 130a Opening 31, 131 Pocket - forming Sheet (Pocket - forming Member) 131a Sheet Piece 32, 132 Plate Member 33, 133 Plate Stitching Part 34, 134 Pocket Stitching Part 34a, 134a First Stitching Part 34b, 134b Second Stitching Part 134ba First Extension Part 134bb Second Extension Part 34c, 134c Third Stitching Part 34d, 134d Fourth Stitching Part 35, 135 Fold 40 Seat Heater 40a Central Heater 40b, 40c Side Heater 41 Seat Substrate 42 Electric Wire 42a Harness 43 Heater Wire 44 Cover Member 45 Heater Stitching Part 45a First Stitching Part 45b Second Stitching Part 45c Third Stitching Part 46 Heater Stitching Part 46a First Stitching Part 46b Second Stitching Part

Claims

1. A vehicle seat having a pocket on the rear surface of a seatback, wherein the seatback has a skin material serving as a covering material for the seatback, the pocket includes a sheet-like pocket forming member that is superimposed on the outer surface of the rear side skin material located on the rear surface of the seatback, a pocket stitching portion for attaching the pocket forming member in a state of being superimposed on the rear side skin material, and has, the pocket stitching portion is provided at the upper end portion of the pocket forming member to form an opening of the pocket, formed at positions sandwiching the opening in the seat width direction, and left and right first stitching portions respectively extending in the seat width direction, left and right second stitching portions that are formed at positions sandwiching the opening in the seat width direction, are respectively connected to the left and right first stitching portions, and extend in a direction intersecting the left and right first stitching portions, left and right third stitching portions that are respectively formed at both end portions in the seat width direction of the pocket forming member to form left and right outer edge portions of the pocket, and extend in the vertical direction, a fourth stitching portion that is formed at the lower end portion of the pocket forming member to form a lower edge portion of the pocket, and extends in the seat width direction, and has, the left and right second stitching portions are arranged inside the left and right third stitching portions in the seat width direction. A vehicle seat characterized by this.

2. The left and right first stitching portions and the left and right second stitching portions are formed at the overlapped portions in a state where a part of the surface of the pocket forming member is overlapped on the outer surface of the rear side skin material, The left and right third stitching portions and the fourth stitching portion are formed at the folded-back portions in a state where the portions other than the overlapped portions are folded back through a fold provided in the pocket forming member. The vehicle seat according to Claim 1, characterized by this.

3. The pocket has a plate-like plate member attached at a position corresponding to the opening in the pocket forming member and extending in the seat width direction along the opening, The plate member is arranged between the left and right second stitching portions in the seat width direction and is arranged at a position that does not intersect the left and right second stitching portions. The vehicle seat according to Claim 1, characterized by this.

4. The pocket has a plate stitching portion for attaching the plate member to the pocket forming member, The plate stitching portion extends in the sheet width direction along the extending direction of the plate member and intersects the left and right second stitching portions. The vehicle seat according to claim 3, characterized in that.

5. The left and right second stitching portions each extend in a direction substantially orthogonal to the left and right first direction portions. The vehicle seat according to claim 1, characterized in that.

6. The second stitching portion includes: a first extending portion that extends in a direction intersecting the first stitching portion; and a second extending portion that is connected to the first extending portion and extends outward in the sheet width direction from the first extending portion in a direction intersecting the first extending portion. The vehicle seat according to claim 1, characterized in that.

7. The second extending portion of the second stitching portion extends in a direction inclined with respect to the first stitching portion. The vehicle seat according to claim 6, characterized in that.

8. The second extending portion of the second stitching portion extends outward in the sheet width direction so as to be away from the first stitching portion. The vehicle seat according to claim 6, characterized in that.

9. A method for manufacturing a vehicle seat provided with a pocket on the rear surface of a seat back, comprising: a step of manufacturing the pocket, In the step of manufacturing the pocket, superposing a sheet-like pocket forming member on the outer surface of the backside skin material disposed on the rear surface of the seat back among the skin materials serving as the covering material of the seat back; attaching the pocket forming member in a state where the pocket forming member is superposed on the backside skin material by a pocket stitching portion; When attaching the pocket forming member, left and right first stitching portions that are provided at the upper end portion of the pocket forming member to form the opening of the pocket, are formed at positions sandwiching the opening in the sheet width direction, and each extend in the sheet width direction; left and right second stitching portions that are formed at positions sandwiching the opening in the sheet width direction, are respectively connected to the left and right first stitching portions, and extend in a direction intersecting the left and right first stitching portions; left and right third stitching portions that are respectively formed at both ends in the sheet width direction of the pocket forming member to form the left and right outer edge portions of the pocket, and extend in the vertical direction so as to dispose the left and right second stitching portions inside in the sheet width direction; A method for manufacturing a vehicle seat, characterized in that, in order to form a lower edge portion of the pocket, the pocket forming member is attached by a fourth stitching portion formed at a lower end portion of the pocket forming member and extending in the sheet width direction.

10. When attaching the pocket forming member, the overlapping portions are attached by the left and right first stitching portions and the left and right second stitching portions in a state where a part of the surface of the pocket forming member is overlapped with the outer surface of the back side skin material, The method for manufacturing a vehicle seat according to claim 9, further characterized in that, in a state where a portion other than the overlapping portion is folded back through a fold provided in the pocket forming member, the folded-back portion is further attached by the left and right third stitching portions and the fourth stitching portion.

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