Seat and method for manufacturing seat

Abstract

The present invention provides a seat that can prevent wrinkles from occurring in the curved portion of the pull portion of the skin and improve the workability of the pull piece installation operation while suppressing the manufacturing cost. The pull portion (7) of the skin (3) has a straight portion and a curved portion that are continuous with each other. The pull piece (6) has a rigid portion (12) installed along the edge of one side of the main body (11) extending in the long side direction. The main body (11) of the pull piece (6) overlaps with the pull portion (7) of the skin (3) in the following state: the rigid portion (12) extends parallel to the end edge (7a) extending in the long side direction of the pull portion (7) at a position away from the end edge (7a) of the pull portion (7) toward the outside of the pull portion (7), and the second edge (11a) of the main body (11) overlaps with the skin (3). The main body (11) is continuously sewn to the pull portion (7) by a sewing portion (9) in the range from the straight portion to the curved portion.

Description

Technical Field

[0001] The present invention relates to a seat and a method for manufacturing the seat, wherein a pulling portion of a surface skin of the seat has a curved portion. Background Art

[0002] Seats used in automobiles and the like generally have a structure in which the surface of a cushion is covered by a skin, as in the seat described in Patent Document 1. The skin has a pulling portion that is drawn into a groove of the cushion and pulled. The pulling portion has a continuous band shape as a whole, and has a curved portion extending in a curved shape at some parts of the seat. The pulling portion is pulled into the groove on the surface of the cushion by a pulling member, and is fixed to a fastening member such as a cable body inside the cushion by a fastener such as an ohm clip.

[0003] The puller includes a main body extending in a strip shape, and a rigid part having bending rigidity and attached along an edge on one side extending in the longitudinal direction of the main body.

[0004] In the structure described in Patent Document 1, the following structure is adopted: the main body and the pulling part are sutured (for example, see Fig.14 Schematic diagram of the Fig.14 36 is a pulling member, 37 is a pulling portion, 41 is a main body portion (41a is an edge on the other side), and 42 is a rigid portion. ).

[0005] In this structure, when the main body of the pull member and the pulling part of the skin are sewn together, the main body of the pull member is folded back at the sewn part and the rigid part is moved downward away from the pulling part of the skin, and the rigid part is fixed to a fixing part such as a cable body inside the pad.

[0006] The structure described in Patent Document 1 has the following structure: the main body and the pulling part are sewn together in a state where the edge of the other side of the pulling part extending along the long side direction of the main body is aligned with the end edge of the pulling part of the epidermis. Therefore, in a state where the main body of the pulling part is folded back at the sewn part and the rigid part is separated from the pulling part of the epidermis (refer to Fig.14 ), at the curved portion of the pulling part of the epidermis, the circumference of the rigid portion at the edge of one side of the main body of the pulling member will be inconsistent with the circumference of the end edge of the pulling part of the epidermis. Based on the above circumference difference, wrinkles may be generated on the epidermis.

[0007] On the other hand, if only the curved portion of the pulling part is provided with a member other than the pulling piece (such as a low-elongation cloth) in order to prevent wrinkles, the manufacturing cost of the seat will increase and it will be difficult to improve the workability of the pulling piece installation operation.

[0008] Prior art literature

[0009] Patent Literature

[0010] Patent Document 1: Japanese Patent Publication No. 2018-126435 Summary of the invention

[0011] An object of the present invention is to provide a seat and a method for manufacturing the seat that can prevent wrinkles from occurring on a curved portion of a puller and improve workability in installing a puller while suppressing manufacturing costs.

[0012] In order to achieve the above-mentioned purpose, the seat of the present invention comprises: a cushion; a skin covering the surface of the cushion and having a pulling portion protruding from the side facing the cushion toward the cushion; and a pulling piece fixing the pulling portion to the cushion; wherein the pulling portion has a straight line portion and a curved line portion that are continuous with each other, the pulling piece has a main body portion in the form of a strip and a rigid portion in the form of a line, the main body portion has a first edge and a second edge extending along the long side direction, the rigid portion has a higher bending rigidity than the main body portion, and is installed along the first edge of the main body portion The first edge, the main body of the pulling member overlaps with the pulling portion of the epidermis in the following state: the rigid portion extends parallel to the end edge at a position away from the end edge extending along the long side direction of the pulling portion and toward the outside of the pulling portion, and a portion of the second edge of the main body overlaps with the epidermis, the main body is continuously sewn to the pulling portion in the range from the straight portion to the curved portion, and the pulling portion is fixed to the pad in a state where the main body of the pulling member extends along the pulling portion without being folded back.

[0013] In the manufacturing method of the seat of the present invention, the seat includes: a cushion; a skin covering the surface of the cushion and having a pulling portion protruding from a side facing the cushion toward the cushion; and a pulling piece fixing the pulling portion to the cushion; wherein the pulling portion has a straight line portion and a curved line portion that are continuous with each other, the pulling piece has a main body portion in the form of a strip and a rigid portion in the form of a line, the main body portion has a first edge and a second edge extending along the long side direction, the rigid portion has a higher bending rigidity than the main body portion, and is installed on the first edge of the main body portion along the first edge of the main body portion. The manufacturing method of the seat comprises: a sewing step, in which the main body is continuously sewn to the pulling part in a range from the straight part to the curved part, while maintaining the state in which the rigid part is separated from the end edge of the pulling part extending along the long side direction by a specified distance to the outside of the pulling part and the second edge of the main body is partially overlapped with the skin; and a skin installing step, in which the skin is installed to the pad by fixing the pulling part to the pad in a state in which the main body of the pulling part extends along the pulling part without being folded back. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a perspective view schematically showing a seat cushion back of a vehicle seat according to an embodiment of the seat of the present invention.

[0015] Figure 2 (a) means Figure 1 (b) is a cross-sectional schematic diagram of a state in which the pulling portion of the epidermis is fixed to the pad based on the pulling member, and (a) is an enlarged cross-sectional view of the pulling portion and its vicinity.

[0016] Figure 3 (a) is Figure 1 (b) is an overall stereoscopic view of the pulling member, and (a) is an enlarged view of the end of the pulling member.

[0017] Figure 4 The figure is a perspective view schematically showing a sewing step of sewing a main body of a pull member to a pull portion of a skin in an embodiment of a seat manufacturing method of the present invention.

[0018] Figure 5 It means in Figure 4 A three-dimensional schematic diagram of the skin installation step of fixing the pulling part of the skin to the groove of the liner by the pulling member after the sewing step is shown. Figure 3 The retaining member is fixed to Figure 2 A three-dimensional schematic diagram of the state of the pulling part.

[0019] Figure 6 It means that Figure 5A perspective view of the corresponding curved portion of the pulling part and the step of fixing the pulling member into the groove of the liner.

[0020] Figure 7 It means to use ohm clips and other fasteners to Figure 6 A three-dimensional schematic diagram of the steps of fixing the rigid part of the pulling member to the cable body and other fixing wires inside the groove of the pad.

[0021] Figure 8 The schematic diagram is a simple sample showing a state in which a pull piece is sewn to a curved portion of a pull portion according to a sewing step of a seat manufacturing method of the present invention.

[0022] Fig. 9 yes Figure 8 IX-IX line cross-sectional view.

[0023] Fig.10 Yes means Fig. 9 A cross-sectional schematic diagram showing the dimensional relationship in the cross-sectional view.

[0024] Fig.11 (a) is a cross-sectional view showing a state in which a pulling portion of a cover in a conventional seat is fixed to a pad by a pulling member as a comparative example, and (b) is an enlarged cross-sectional view of the pulling portion and its vicinity in (a).

[0025] Fig.12 This is a perspective view showing a state in which a pulling portion of a cover of a conventional seat is fixed to a groove of a pad by a pulling member as a comparative example.

[0026] Fig.13 As a comparative example, the figure shows a state in which a pull piece is sewn to a curved portion of a pull part in a conventional seat and wrinkles are generated.

[0027] Fig.14 yes Fig.13 A cross-sectional view of a pulling portion and a pulling member.

[0028] Fig.15 Yes means Fig.14 A diagram showing the dimensional relationship in a cross-sectional view. DETAILED DESCRIPTION

[0029] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[0030] like Figure 1 As shown in FIG. 1 , a vehicle seat 1 as one embodiment of the seat of the present invention includes a seat back for supporting the back of a seated person. Figures 1 to 2 As shown, the seat back includes a pad 2 , a skin 3 covering a surface of the pad 2 , and a tension member 6 .

[0031] The cushion 2 is a soft member made of a foamed resin such as polyurethane. The cushion 2 has a flat surface portion 2a and a curved surface portion 2b. The flat surface portion 2a is a portion that supports the back of the seated person of the seat 1. The curved surface portion 2b is a portion that is adjacent to the flat surface portion 2a ( Figure 2 The right side of the figure is a series of mountain-shaped raised parts that are continuous with each other.

[0032] Furthermore, continuous grooves 5 are formed between the flat surface portion 2 a and the curved surface portion 2 b of the pad 2 as recessed portions for fixing the pulling portion 7 of the cover 3 .

[0033] The skin 3 is a member including a single-layer membrane or a two-layer or more membrane, wherein the single-layer membrane is formed of natural leather, synthetic leather or fabric (cloth products such as textiles), and the two-layer or more membrane is formed of the above-mentioned leather film and non-woven fabric or foamed resin layer. Figure 2 As shown in (a) and (b), the skin 3 has a plurality of skin portions 3a, 3b having shapes corresponding to the surface shapes of the planar portion 2a and the curved portion 2b of the pad 2 so as to cover the surfaces of the planar portion 2a and the curved portion 2b without gaps.

[0034] The skin 3 is formed by sewing the ends of the adjacent skin parts 3a, 3b together (see Figure 2 The ends of the adjacent skin portions 3a and 3b are joined to each other by the seam 8 to form the pulling portion 7. In other words, the skin 3 has a side (ie, the side facing the pad 2) Figure 2 The lower side in (a) and (b) of FIG. 5 protrudes toward the liner 2 and is fixed to the pulling portion 7 of the liner 2 in a manner of being introduced into the groove 5.

[0035] The pulling portion 7 has a continuous strip shape as a whole, and has mutually continuous straight line portions (for example, Figure 1 The portion extending in the vertical direction in the range A) and the curved portion (for example, Figure 1 The approximately L-shaped curved portion in the range B of the two locations). Therefore, Figure 1 The overall shape of the pulling portion 7 shown is a band-like shape bent in an inverted U shape.

[0036] Furthermore, the groove 5 of the gasket 2 also has an inverted U-shape (ie, a shape having a pair of straight portions and a curved portion) so as to correspond to the overall shape of the pulling portion 7 described above.

[0037] The pulling tool 6 has a structure capable of fixing the pulling portion 7 to the pad 2 by pulling the pulling portion 7 toward the pad 2 .

[0038] Specifically, if Figure 3As shown in (a) and (b), the pulling member 6 has: a main body portion 11 in a strip shape; a rigid portion 12 in a linear shape; an edge of one side extending along the longitudinal direction of the main body portion 11 (ie, Figures 9 to 10 It is installed along the first edge 11b of the lower side extending along the long side direction.

[0039] In the initial state before the pulling member 6 is installed on the pulling portion 7, the rigid portion 12 has a Figure 3 (b) or a straight line portion ( Figure 1 The bending rigidity of the rigid portion 12 is set higher than the bending rigidity of the main body portion 11.

[0040] In addition, the main body 11 and the rigid part 12 can be made of any material as long as the above conditions are met. Therefore, for example, the strip-shaped main body 11 and the cylindrical rigid part 12 can be integrally formed of synthetic resin or the like. In this case, the bending of the main body 11 and the rigid part 12 in the direction perpendicular to the long side direction ( Figure 3 When the cylindrical rigid portion 12 is bent in the vertical direction (b), the cross-sectional moment of inertia of the cylindrical rigid portion 12 is larger than that of the strip-shaped main body portion 11, and the bending rigidity corresponding to the cross-sectional moment of inertia is also larger.

[0041] Alternatively, the main body 11 may be molded of resin, the rigid portion 12 may be manufactured of a metal wire or the like, and fixed to the first edge 11 b of the main body 11 by heat welding or bonding.

[0042] Figure 3 The main body 11 of the pulling member 6 shown in (a) and (b) overlaps with the pulling portion 7 of the epidermis 3 in the following state: the rigid portion 12 is at the edge 7a extending along the longitudinal direction relative to the pulling portion 7 (refer to Figure 2 (b) and Figure 4 ) extends parallel to the end edge 7a at a position spaced apart from the outside of the pulling portion 7 (specifically, a position spaced apart from the end edge 7a in the protruding direction of the pulling portion 7 (in other words, in a direction perpendicular to the long side direction of the pulling portion 7)) (see Figure 4 ), and the second edge 11a on the upper side of the main body 11 (refer to Figures 9 to 10 ) (that is, the upper edge on the opposite side of the lower first edge 11 b of the mounting rigid portion 12 ) overlaps with the surface skin 3 .

[0043] like Figure 2 (b) and Figure 4 As shown, the main body 11 of the pulling member 6 is in the straight line portion ( Figure 1 Range A) to the curve part ( Figure 1The range B) is continuously sewn to the pulling portion 7 to form a sewn portion 9.

[0044] As described above, the pulling portion 7 is formed by sewing the two adjacent skin portions 3 a and 3 b constituting the skin 3 .

[0045] The seam 9 where the main body U of the pulling member 6 is sewn to the pulling portion 7 is located closer to the edge 7a ( 20a ) extending in the longitudinal direction of the pulling portion 7 than the seam 8 where the two skin portions 3a and 3b of the pulling portion 7 are sewn together. Figure 4 and Fig.10 )This side( Figure 2 and Figures 9 to 10 ).

[0046] like Figures 9 to 10 As shown, the upper second edge 11a of the main body 11 of the pull member 6 abuts against the surface of the skin 3 facing the pad 2 (specifically, abuts against the skin portion 3b via the seam 8). Figures 9 to 10 In order to clearly illustrate the second edge 11a, the surface portion 3b, and the seam portion 8, these portions are shown separated from each other, but in reality, these portions are in close contact with each other.

[0047] The pulling portion 7 is fixed to the pad 2 in a state where the main body 11 of the pulling member 6 is not folded back but extends along the pulling portion 7. Here, "the main body 11 is not folded back but extends along the pulling portion 7" means a state where the main body 11 extends along the pulling portion 7 in a manner that the upper second edge 11a of the main body 11 does not overlap with other parts of the main body 11.

[0048] (Description of Method for Manufacturing Seat 1)

[0049] The seat 1 having the above-described structure is manufactured as follows.

[0050] First, use Figure 4 The sewing machine M shown sews the ends of the plurality of skin parts 3a and 3b constituting the skin 3 together as the sewn portion 8. Thus, the pulling portion 7 protruding toward the pad 2 is formed in the skin 3 (pulling portion forming step).

[0051] Next, the main body 11 of the puller 6 is sewn to the puller portion 7 of the cover 3 (sewing step). As the puller 6, a member having a shape in which the main body 11 extends linearly with a predetermined width is used.

[0052] The sewing steps of the pulling member 6 are as follows: Figure 4As shown, the following state is maintained even if the rigid portion 12 of the pulling member 6 is away from the outer side of the pulling portion 7 by a specified distance (for example, Figure 4 and Fig.10 The distance D1 from the edge 7a to the lower end 12a (distal end) of the rigid portion 12 is shown, and as Figures 9 to 10 As shown, the main body 11 is continuously sewn to the pulling portion 7 from the straight portion to the curved portion while the upper second edge 11a of the main body 11 overlaps the skin 3 (specifically, the skin portion 3b).

[0053] In the sewing step, it is more ideal to use a sewing clamp to sew the main body 11 of the pulling member 6 to the pulling portion 7 while holding the rigid portion 12 in a manner that maintains the rigid portion 12 at a specified distance to the outside of the pulling portion 7 relative to the end edge 7a extending along the long side direction of the pulling portion 7.

[0054] The shape of the sewing jig is not particularly limited in the present invention, as long as it has the following structure, that is, in the operation of sewing the main body 11 from the straight part to the curved part to the pulling part 7 continuously (specifically, in the use of Figure 4 During sewing work performed by the sewing machine M, the pulling portion 7 and the pulling member 6 are simultaneously and linearly fed outwardly), and the rigid portion 12 can be maintained at a specified distance away from the end edge 7a of the pulling portion 7 to the outside of the pulling portion 7.

[0055] Based on this sewing step, one pulling member 6 can be continuously sewn to the straight line portion ( Figure 1 Range A and Figure 5 ) and the curve part ( Figure 1 Range B and Figures 6 to 7 The sewn pulling member 6 is shaped to correspond to the shape of the pulling portion 7 (i.e. Figure 1 The inverted U-shape of the pulling portion 7 is deformed from the initial state of extending linearly to Figure 3 The inverted U shape shown in (a).

[0056] After the stitching step, Figures 5 to 7 As shown in FIG. 1 , the pull member 6 sewn to the pull portion 7 of the skin 3 is inserted into each of the straight and curved portions of the groove 5 of the pad 2. Figure 7 As shown in FIG. 1 , the rigid portion 12 at the lower end of the pull member 6 is fixed to the fixing wire 21 such as the cable body inside the groove 5 by using a single-turn loop or a ring-shaped ohm clamp or other fastener 22. In this operation, the Figure 5The seat 1 is fastened by a tool such as a snap ring pliers H as shown in the figure. The tool performs fastening by a fastener 22 such as an ohm clip. Based on this fixing operation, the pulling portion 7 of the skin 3 is fixed to the groove 5 of the cushion 2 through the pulling member 6. As a result, the skin 3 can be attached to the surface of the cushion 2 in a state where the pulling portion 7 is fixed to the cushion 2 over its entire length (or a required length) (skin attachment step). Thus, the manufacture of the seat 1 is completed.

[0057] In recent years, there has been a tendency to make the depth of the groove 5 of the pad 2 shallower. In order to correspond to the depth of the groove 5, it is required to narrow the width of the main body 11 of the pull member 6. In the case of adopting the above-mentioned structure of the seat 1, since the pull member 6 is sewn in a form of docking with the pulling portion 7 of the epidermis 3 (that is, in a state in which the rigid portion 12 is preliminarily separated from the end edge 7a of the pulling portion 7 by a specified distance to the outside of the pulling portion 7), it is easy to visually identify the main body 11 and the rigid portion 12 from the outside. Therefore, it is easy to use the fastener 22 to fix the rigid portion 12 to the fixing wire 21 inside the groove 5 of the pad 2.

[0058] (Features of this embodiment)

[0059] (1) In the seat 1 of this embodiment, as Figure 2 As shown in (a) and (b) of FIG. 1 , the main body 11 of the pull member 6 overlaps with the pull portion 7 of the epidermis 3 in the following state: the rigid part 12 extends parallel to the end edge 7a of the pull portion 7 at a position away from the end edge 7a extending along the longitudinal direction of the pull portion 7, and the second edge 11a of the upper side of the main body 11 overlaps with the epidermis 3. Moreover, the main body 11 is continuously sewn to the pull portion 7 in the range from the straight portion to the curved portion of the pull portion 7. Moreover, the pull portion 7 is fixed to the pad 2 in the state where the main body 11 of the pull member 6 extends along the pull portion 7 without being folded back.

[0060] Therefore, in this structure, the main body 11 of the pulling member 6 is continuously sewn to the pulling portion 7 in the range from the straight portion to the curved portion while maintaining the following state: at the curved portion of the pulling portion 7, the rigid portion 12 having high bending rigidity in the pulling member 6 is bent and extends parallel to the end edge 7a at a position away from the end edge 7a extending in the long side direction of the pulling portion 7 and outward from the pulling portion 7. As a result, the rigid portion 12 generates a restoring force in the curved portion of the pulling portion 7. Based on the restoring force of the rigid portion 12, the rigid portion 12 pushes the epidermis 3 in a direction away from the pad 2 through the portion of the second edge 11a on the upper side of the main body 11 of the pulling portion 7 while maintaining a state in which the circumference thereof is consistent with that of the end edge 7a of the pulling portion 7 (refer to Fig. 9 The force F that pushes the epidermis 3 upwards) is applied. As a result, the epidermis 3 is Figure 8 As shown in the figure, the curved portion of the pulling part 7 is formed into a three-dimensional shape that stretches outward, and it is possible to prevent the epidermis 3 from wrinkling.

[0061] In addition, in the above-mentioned structure, it is only necessary to sew one pulling member 6 continuously in the range from the straight portion to the curved portion in the pulling portion 7 of the epidermis 3, so it is not necessary to provide other parts other than the pulling member 6 only in the curved portion of the pulling portion 7 as in the past. Therefore, it is possible to improve the workability of the installation work of the pulling member 6 while suppressing the manufacturing cost.

[0062] (2) More specifically, in the seat 1 of the present embodiment, the rigid portion 12 is attached to the first edge 11b of the lower side extending in the longitudinal direction of the main body portion 11 (see Figures 9 to 10 ), the pulling member 6 is based on the straight part ( Figure 1 Range A) to the curve part ( Figure 1 The range of the skin 3 (the range of the skin 3) is continuously sewn to the pulling portion 7, so that the pulling portion 7 of the skin 3 stands up relative to the main part of the skin 3 (specifically, the skin part 3b located outside the curved part), and the second edge 11a of the upper side of the main part 11 of the pulling member 6 lifts the skin 3 from the inner side of the skin 3, so that the final shape of the skin 3 becomes a three-dimensional shape extending outward. As a result, wrinkles on the skin 3 are suppressed, thereby improving the appearance of the seat.

[0063] Moreover, the rigid portion 12 is installed on the first edge 11b of the lower side of the main body 11 of the pulling member 6, and the rigid portion 12 is extended parallel to the end edge 7a of the pulling portion 7 of the epidermis 3 and is separated from the outside of the pulling portion 7, thereby enabling the pulling member 6 to be correctly positioned relative to the pulling portion 7.

[0064] (3) In addition, the main body 11 of the pull member 6 overlaps with the pull portion 7 of the skin 3 in a state where the rigid portion 12 extends parallel to the end edge 7a of the pull portion 7 at a position away from the end edge 7a extending in the longitudinal direction of the pull portion 7 and the second edge 11a on the upper side of the main body 11 (i.e., the edge on the opposite side of the first edge 11b on the lower side where the rigid portion 12 is attached) overlaps with the skin 3. In this structure, since the pull member 6 is not folded back, the manufacturing tolerance and dimensional variation can be reduced.

[0065] For example, Fig.10In this way, the main body 11 of the pull member 6 is sewn to the pull portion 7 continuously in the range from the straight portion to the curved portion in a positional relationship such that the rigid portion 12 extends in parallel to the position at a predetermined distance D1 outside the pull portion 7 relative to the end edge 7a of the pull portion 7. Therefore, the distance D2 that becomes the reference of the manufacturing tolerance (i.e., the distance from the sewn portion 8 between the skin portions 3a and 3b of the skin 3 to the lower end (distal end) 12a of the rigid portion 12) depends on the tolerance of the distance D1, and considering that the distance D1 is strictly managed in the sewing step, the manufacturing tolerance of the reference distance D2 can be reduced.

[0066] As described above, in the seat 1 of the present embodiment, in order to install the pulling member 6 on the curved portion of the pulling part 7, it is possible to continuously sew one pulling member 6 to the pulling part 7 of the skin 3 without performing the conventional processing (such as installing other components only on the curved portion, etc.), thereby improving the workability of the sewing operation.

[0067] Moreover, the rigid part 12 of the pulling member 6 is directed toward the fixing direction of the pulling part 7 of the epidermis 3 ( Figures 9 to 10 Therefore, the labor and time of folding back the main body 11 of the pulling member 6 can be omitted, thereby improving the assembly workability.

[0068] (4) In the seat 1 of this embodiment, as Figure 2 As shown in (a) and (b) of FIG. 1 , the pulling part 7 is formed by sewing two adjacent skin parts 3a and 3b constituting the skin 3. The sewing part 9 where the main body 11 of the pulling member 6 is sewn to the pulling part 7 is located closer to the end edge 7a extending in the longitudinal direction of the pulling part 7 than the sewing part 8 where the two skin parts 3a and 3b in the pulling part 7 are sewn together (see FIG. 1 ). Figure 2 (b) and Fig.10 ) on this side.

[0069] In this structure, even if there are two seams 8 and 9 in the pulling portion 7 of the cover 3, the possibility of damaging the appearance of the seat 1 is suppressed because the positions of these seams are different. That is, when the positions of the seams 8 and 9 are on the same line, the appearance of the seat 1 may be damaged. For example, when the cover 3 is leather, multiple needle holes may be formed on the same line in the pulling portion 7 during sewing. When the cover 3 is a textile such as cloth, the sewing needle may cut the thread when passing through the pulling portion 7 on the same line during sewing. The cut thread will appear on the surface of the seat 1 and damage the appearance of the seat 1. It can be considered that the possibility of damaging the appearance of the seat 1 is high (specifically, it is the use of the above-mentioned Figure 2 The damage possibility is about twice that of the structures shown in (a) and (b) above. Figure 2In the case of the structures shown in (a) and (b), the possibility of these damaging the appearance of the seat 1 can be suppressed.

[0070] (5) In the seat 1 of this embodiment, as Figures 9 to 10 As shown, the upper second edge 11a of the main body 11 of the pull member 6 contacts the surface of the epidermis 3 that faces the pad 2. Thus, the main body 11 of the pull member 6 can effectively push the epidermis 3 outward, and wrinkles can be effectively prevented from occurring in the curved portion of the pull member 7.

[0071] In addition, Figures 9 to 10 In FIG. 1 , the state in which the outer skin portion 3 b is in contact with the outer skin portion 3 b via the seam portion 8 is shown, but the outer skin portion 3 b may be directly in contact with the outer skin portion 3 b.

[0072] (6) The manufacturing method of the seat 1 of the present embodiment includes the following steps in order to manufacture the seat 1 having the above-mentioned structure: a sewing step of continuously sewing the main body 11 to the pulling part 7 in the range from the straight part to the curved part while maintaining the state in which the rigid part 12 of the pulling part 6 is away from the outer side of the pulling part 7 relative to the end edge 7a extending along the long side direction of the pulling part 7 by a specified distance and the second edge 11a on the upper side of the main body 11 of the pulling part 6 is partially overlapped with the skin 3; a skin installing step of installing the skin 3 to the pad 2 by fixing the pulling part 7 to the cushion 2 while the main body 11 of the pulling part 6 extends along the pulling part 7 without being folded back.

[0073] In this manufacturing method, by maintaining the rigid portion 12 of the pull member 6 away from the end edge 7a extending in the longitudinal direction of the pull member 7 of the epidermis 3 by a predetermined distance to the outside of the pull member 7 and overlapping the second edge 11a of the main body 11 of the pull member 6 with the epidermis 3, the main body 11 of the pull member 6 can be continuously sewn to the pull member 7 in the range from the straight portion to the curved portion while the rigid portion 12 is maintained in parallel with the end edge 7a extending in the longitudinal direction of the pull member 7. Thus, the main body 11 of the pull member 6 can be continuously sewn to the pull member 7 in the range from the straight portion to the curved portion while the rigid portion 12 is deformed following the curved portion of the pull member 7. As a result, the operation of continuously sewing one pull member 6 in the range from the straight portion to the curved portion in the pull member 7 of the epidermis 3 can be reliably performed. As a result, not only the occurrence of the above-mentioned wrinkles can be suppressed, but also the workability of the installation work of the puller 6 can be improved while suppressing the manufacturing cost.

[0074] (7) More specifically, in the manufacturing method of the seat of the present embodiment, in the above-mentioned sewing step, since the rigid portion 12 of the pull member 6 is maintained in a state of being away from the outside of the pull portion 7 relative to the end edge 7a extending along the long side direction of the pull portion 7 at a specified distance and the second edge 11a of the main body 11 of the pull member 6 is partially overlapped with the skin 3, there is no need to fold back the pull member 6, so that manufacturing tolerance and dimensional variation can be reduced. Therefore, in order to install the pull member 6 on the curved portion of the pull portion 7, it is possible to continuously sew one pull member 6 to the pull portion 7 of the skin 3 without performing the conventional process, thereby improving the workability of the sewing operation. Moreover, since the rigid portion 12 of the pull member 6 is oriented toward the fixed direction of the pull portion 7 of the skin 3 ( Figures 9 to 10 The positioning is performed by means of the method of (below in the middle), so the labor and time of folding back the main body 11 of the pulling member 6 can be omitted, thereby improving the assembly workability.

[0075] Furthermore, in the above-mentioned sewing step, the rigid portion 12 of the pulling member 6 is maintained in a state of being away from the outer side of the pulling member 7 by a specified distance relative to the end edge 7a extending along the longitudinal direction of the pulling member 7, and the main body 11 is continuously sewn to the pulling member 7 in the range from the straight portion to the curved portion while the second edge 11a of the main body 11 of the pulling member 6 is partially overlapped with the epidermis 3. Thus, in the curved portion of the pulling member 7, based on the restoring force generated by the rigid portion 12, the rigid portion 12 pushes the epidermis 3 in the direction away from the pad 2 through the second edge 11a on the upper side of the main body 11 of the pulling member 7 while maintaining the circumference consistent with the end edge 7a of the pulling member 7 (see Fig. 9 The force F that pushes the epidermis 3 upwards) is applied. As a result, the epidermis 3 is Figure 8 As shown in the figure, the three-dimensional shape is extended outward at the curved portion 7b of the pulling part 7, which can prevent the skin 3 from wrinkling. In addition, the rigid part 12 attached to the first edge 11b extending along the long side direction of the main body 11 of the pulling member 6 is separated from the end edge 7a of the pulling part 7 of the skin 3 by a predetermined distance to the outside of the pulling part 7, so that the pulling member 6 can be correctly positioned relative to the pulling part 7.

[0076] Furthermore, in this manufacturing method, regardless of the width of the pulling portion 7 of the skin 3, the main body 11 of the pulling member 6 is positioned so that the sub-pulling portion 7 is sewn to the main body 11 with a predetermined width. Therefore, it is not necessary to change the width of the main body 11 of the pulling member 6 according to the width of the pulling portion 7 of the skin 3, so that the width of the main body 11 can be unified, and the pulling member 6 can be made universal. Thus, the manufacturing cost can be reduced.

[0077] In addition, the pulling member 6 of this embodiment is different from the conventional pulling member (for example, by using Figures 11 to 15Compared with the pulling member 36 in which the main body 41 shown is folded back and used, the width of the main body 11 can be further narrowed, which can also reduce the manufacturing cost.

[0078] (8) In the manufacturing method of the seat 1 of the present embodiment, a pull member 6 having a shape in which the main body 11 extends linearly with a predetermined width is used. Therefore, before the pull member 6 is sewn to the pull portion 7, it is not necessary to pre-process it into a shape along the curved portion of the pull portion 7, thereby reducing the manufacturing cost.

[0079] (9) In the manufacturing method of the seat 1 of the present embodiment, in the sewing step, a sewing jig is used to sew the main body 11 of the pulling member 6 to the pulling portion 7 while holding the rigid portion 12 in a state where the rigid portion 12 is maintained at a specified distance to the outside of the pulling portion 7 relative to the end edge 7a extending along the long side direction of the pulling portion 7.

[0080] In this feature, in the sewing step, since a sewing clamp is used to hold the rigid portion 12 of the pulling member 6 at a specified distance to the outside of the pulling portion 7 relative to the end edge 7a of the pulling member 6, there is no need to provide a mark for positioning the pulling member 6 on either the pulling member 6 or the pulling portion 7, thereby reducing manufacturing costs.

[0081] (Comparison with Comparative Example)

[0082] Below, refer to Figures 11 to 15 A comparison between the present embodiment and the comparative example will be described with respect to the structure of a conventional seat as a comparative example for comparison with the structure of the seat 1 of the present embodiment described above.

[0083] As Figures 11 to 15 The structure of the conventional seat of the comparative example shown in the figure is different from that of the above-mentioned embodiment in the following points. Figure 2 The structures of the seats 1 shown in (a) and (b) are common in that they include a pad 32 having a groove 35, a skin 33 having a pulling portion 37, and a pulling member 36; and the pulling member 36 includes a main body 41 and a rigid portion 42.

[0084] but, Figures 11 to 15 The structure of the comparative example is different from that of the present embodiment in the following points (i) to (iii).

[0085] (i) in Figures 11 to 15 In the comparative example, the edge 41a (the edge on the side opposite to the rigid portion 42) of the pulling member 36 extending along the long side direction of the main body portion 41 is aligned with the end edge 37a of the pulling portion 37, while in the present embodiment, the end edge 7a ( Figure 4and Fig.10 ) is different in that the rigid portion 12 is positioned away from the outside of the pulling portion 7 by a predetermined distance D1.

[0086] (ii) Figures 11 to 15 In the comparative example, the position where the main body 41 of the pulling member 36 is sewn to the sewing portion 39 of the pulling portion 37 is consistent with the sewing portion 38 between the skin portions 33a and 33b of the skin 33. However, in the present embodiment, the main body 11 of the pulling member 6 is sewn to the sewing portion 9 ( Figure 2 and Figures 9 to 10 ) is located on the side (lower side) close to the end edge 7a of the pulling portion 7 relative to the seam 8 between the skin portions 3a and 3b of the skin 3.

[0087] (iii) Figures 11 to 15 In the comparative example, the main body 41 of the pulling member 36 is folded back at the position of the sewn portion 39 after being sewn to the pulling portion 37, and the rigid portion 42 is fixed to the inside of the groove 35 of the pad 32, while in the present embodiment, Figure 2 As shown, the following point is different: the main body 11 of the pulling member 6 is not folded back after being sewn to the pulling part 7, and the main body 11 extends parallel to the pulling part 7 while the rigid part 12 is fixed to the inside of the groove 5 of the liner 2.

[0088] Based on the above-mentioned differences (i) to (iii), in the present embodiment, as described in (1) of the above-mentioned (feature of the present embodiment), the main body 11 of the pulling member 6 is continuously sewn to the pulling portion 7 in the range from the straight portion to the curved portion while maintaining the following state: at the curved portion of the pulling portion 7, the rigid portion 12 having high bending rigidity in the pulling member 6 is bent and extends parallel to the end edge 7a at a position away from the outside of the pulling portion 7 relative to the end edge 7a extending in the long side direction of the pulling portion 7. As a result, the rigid portion 12 generates a restoring force in the curved portion of the pulling portion 7. Based on the restoring force of the rigid portion 12, the rigid portion 12 pushes the epidermis 3 in the direction away from the pad 2 through the second edge 11a of the main body 11 of the pulling portion 7 while maintaining a state in which the circumference thereof is consistent with the end edge 7a of the pulling portion 7 (refer to Fig. 9 The force F that pushes the epidermis 3 upwards) is applied. As a result, the epidermis 3 is Figure 8 As shown in the figure, the curved portion 7 b of the pulling portion 7 is formed into a three-dimensional shape extending outward, which can prevent the epidermis 3 from wrinkling.

[0089] On the other hand, Figures 11 to 15In the comparative example of FIG. 3 , the circumference of the pulling portion 37 is consistent with the circumference of the edge 41a (the edge on the side opposite to the rigid portion 42) of the main body 41 of the pulling member 36 in the curved portion, but the circumference of the pulling portion 37 is inconsistent with the circumference of the rigid portion 42. Therefore, no force is generated to push the epidermis 33 away from the liner 32. Fig.13 As shown, the epidermis 3 has wrinkles C at the curved portion 37 b of the pulling portion 37 , and it is impossible to prevent the epidermis 3 from wrinkling as in the present embodiment.

[0090] In addition, in the structure of this embodiment, it is only necessary to sew one pull piece 6 continuously from the straight part to the curved part in the pull part 7 of the epidermis 3. Therefore, it is not necessary to provide other parts other than the pull piece 6 only in the curved part of the pull part 7 as in the past. Therefore, it is possible to improve the workability of the installation work of the pull piece 6 while suppressing the manufacturing cost. Figures 11 to 15 In the comparative example, in order to prevent wrinkles from occurring in the curved portion 37 b of the pulling portion 37 , additional components need to be provided, and it is impossible to suppress the manufacturing cost and improve the workability of the installation operation of the pulling member 36 .

[0091] Furthermore, in the present embodiment, as described in (3) of the above-mentioned (feature of the present embodiment), the main body 11 of the pulling member 6 overlaps with the pulling portion 7 of the epidermis 3 in the following state: the rigid portion 12 extends parallel to the end edge 7a at a position away from the end edge 7a extending along the long side direction of the pulling portion 7 and outward from the pulling portion 7, and the second edge 11a of the main body 11 (i.e., the edge on the opposite side of the first edge 11b to which the rigid portion 12 is installed) partially overlaps with the epidermis 3. Therefore, since the pulling member 6 is not a folded-back structure, the manufacturing tolerance and dimensional variation are small. On the other hand, in Figures 11 to 15 In the comparative example, due to the structure of the folded back pulling member 36, the manufacturing tolerance and size are large. For example, Fig.15 In the comparative example shown, the distance D3 which serves as the basis for manufacturing tolerance (i.e., the distance from the seam 38 between the skin portions 33a, 33b of the skin 33 to the lower end (distal end) 42a of the rigid portion 42) depends on the entire length of the folded-back main body portion 41. Therefore, it is difficult to reduce the manufacturing tolerance of the basis distance D3, and the manufacturing tolerance and dimensions vary greatly.

[0092] In addition, in the present embodiment, as described in (4) of the above-mentioned (feature of the present embodiment), even if there are two seams 8 and 9 in the pulling portion 7 of the skin 3, the positions of these seams are different, so the possibility of damaging the appearance of the seat 1 is suppressed. Figures 11 to 12In the comparative example, since the positions of the two seams 38 and 39 coincide with each other on the pulled portion 37 of the skin 33, if the skin 3 is made of cloth or the like, the weaving thread may be damaged, which may impair the appearance of the seat.

[0093] In addition, in this embodiment, as described in (7) of the above-mentioned (feature of this embodiment), it is not necessary to fold back the pull member 6, so that the pull member 6 can be correctly positioned, the manufacturing tolerance and the dimensional variation can be reduced, and one pull member 6 can be continuously sewn to the pulling portion 7 of the epidermis 3, thereby improving the workability of the sewing operation. Figures 9 to 10 Therefore, the labor and time of folding back the main body 11 of the pulling member 6 can be omitted, thereby improving the assembly workability. Figures 11 to 15 In the comparative example, the operation of folding back the pulling member 36 is required, which takes labor and time, and the pulling member 36 cannot be correctly positioned, so the manufacturing tolerance and size variation are large. In addition, it is impossible to sew one pulling member 36 to the pulling portion 37 of the skin 33 continuously, and other parts are required at the curved part of the pulling portion 37, making it difficult to improve the workability of the sewing operation.

[0094] Furthermore, in the manufacturing method of this embodiment, regardless of the width of the pulling portion 7 of the skin 3, the main body 11 of the pulling piece 6 is positioned in a manner of being sewn to the pulling portion 7 at a predetermined width. Therefore, it is not necessary to change the width of the main body 11 of the pulling piece 6 according to the width of the pulling portion 7 of the skin 3, so the width of the main body 11 can be unified, and the pulling piece 6 can be made universal. This can reduce the manufacturing cost. On the other hand, in Figures 11 to 15 In the comparative example, since the pulling member 36 having the main body 41 having a width corresponding to the width of the pulling portion 37 of the epidermis 33 is required, it is impossible to realize the commonality of the pulling member 36, and it is difficult to reduce the manufacturing cost.

[0095] <Summary of Implementation Methods>

[0096] The embodiments are summarized as follows.

[0097] The seat of this embodiment includes: a cushion; a skin covering the surface of the cushion and having a pulling portion protruding from a side facing the cushion toward the cushion; and a pulling piece fixing the pulling portion to the cushion; wherein the pulling portion has a straight line portion and a curved line portion that are continuous with each other, the pulling piece has a main body portion in the form of a strip and a rigid portion in the form of a line, the main body portion has a first edge and a second edge extending along the long side direction, the rigid portion has a higher bending rigidity than the main body portion, and is installed on the first edge of the main body portion along the first edge of the main body portion The main body of the pulling member overlaps with the pulling portion of the epidermis in the following state: the rigid portion extends parallel to the end edge at a position away from the end edge extending along the long side direction of the pulling portion and outward of the pulling portion, and a portion of the second edge of the main body overlaps with the epidermis, the main body is continuously sewn to the pulling portion in a range from the straight portion to the curved portion, and the pulling portion is fixed to the pad in a state where the main body of the pulling member extends along the pulling portion without being folded back.

[0098] In this structure, the main body of the pull piece overlaps with the pull part of the epidermis in a state that the rigid part extends parallel to the end edge of the pull part at a position away from the end edge extending along the longitudinal direction of the pull part and the second edge of the main body overlaps with the epidermis. Moreover, the main body is continuously sewn to the pull part from the straight part to the curved part. Moreover, the pull part is fixed to the pad in a state where the main body of the pull piece extends along the pull part without being folded back.

[0099] Therefore, in this structure, the main body of the pull piece is continuously sewn to the pull part in the range from the straight part to the curved part while maintaining the following state: at the curved part of the pull part, the rigid part with high bending rigidity in the pull piece is bent and extends parallel to the end edge at a position away from the end edge extending along the long side direction of the pull part and away from the outside of the pull part. As a result, the rigid part generates a restoring force at the curved part of the pull part. Based on the restoring force of the rigid part, the rigid part pushes the epidermis in the direction away from the pad through the second edge of the main body of the pull part while maintaining the state that the circumference of the rigid part is consistent with that of the end edge of the pull part. As a result, the epidermis becomes a three-dimensional shape extending outward at the curved part of the pull part, which can prevent the epidermis from wrinkling.

[0100] In addition, in the above-mentioned structure, it is only necessary to sew one pull piece continuously from the straight part to the curved part in the pull part of the epidermis, so it is not necessary to provide other parts other than the pull piece only in the curved part of the pull part as in the past. Therefore, it is possible to improve the workability of the pull piece installation operation while suppressing the manufacturing cost.

[0101] In the above-mentioned seat, it is more ideal that the pulling portion is formed based on sewing two adjacent skin portions constituting the skin, and the portion where the main body is sewn to the pulling portion is located closer to the end edge extending along the long side direction of the pulling portion than the portion where the two skin portions in the pulling portion are sewn.

[0102] In this structure, even if there are two seams in the pulled portion of the skin, the positions of these seams are different, so that the possibility of damaging the appearance of the seat is suppressed.

[0103] In the above-mentioned seat, preferably, the second edge portion of the main body of the pull member abuts against a surface of the cover that is opposite to the pad.

[0104] In this structure, the main body of the puller can reliably exert the effect of pushing the epidermis outward, and the epidermis can be reliably prevented from wrinkling in the curved portion of the puller.

[0105] In the manufacturing method of the seat of the present embodiment, the seat includes: a cushion; a skin covering the surface of the cushion and having a pulling portion protruding from the side facing the cushion toward the cushion; and a pulling piece fixing the pulling portion to the cushion; wherein the pulling portion has a straight line portion and a curved line portion that are continuous with each other, the pulling piece has a main body portion in the form of a strip and a rigid portion in the form of a line, the main body portion has a first edge and a second edge extending along the long side direction, the rigid portion has a higher bending rigidity than the main body portion, and is installed on the second edge along the first edge of the main body portion. 1 edge, the manufacturing method of the seat comprises: a sewing step of continuously sewing the main body to the pulling part in a range from the straight portion to the curved portion while maintaining the state in which the rigid part is separated from the end edge of the pulling part extending along the long side direction by a specified distance to the outside of the pulling part and the second edge of the main body is partially overlapped with the skin; and a skin mounting step of mounting the skin to the pad by fixing the pulling part to the pad in a state in which the main body of the pulling member extends along the pulling part without being folded back.

[0106] In the manufacturing method, by maintaining the rigid part of the pull member in a state where the end edge of the pull member extending along the longitudinal direction of the skin is away from the outer side of the pull member by a predetermined distance and making the second edge of the main body of the pull member overlap the skin, the main body of the pull member can be continuously sewn to the pull member in the range from the straight part to the curved part while the rigid part is maintained in a state parallel to the end edge of the pull member extending along the longitudinal direction. Thus, the main body of the pull member can be continuously sewn to the pull member in the range from the straight part to the curved part while the rigid part is deformed following the curved part of the pull member. As a result, the operation of continuously sewing one pull member in the range from the straight part to the curved part in the skin can be effectively performed. As a result, the workability of the pull member installation operation can be improved while suppressing the manufacturing cost of the seat, wherein the seat suppresses the occurrence of the above-mentioned wrinkles.

[0107] In the above-mentioned method of manufacturing a seat, it is preferable to use, as the pull member, a pull member having a shape in which the main body portion extends linearly with a predetermined width.

[0108] According to this feature, before the pull piece is sewn to the pull portion, it is not necessary to preliminarily process it into a shape along the curved portion of the pull portion, so that the manufacturing cost can be suppressed.

[0109] In the above-mentioned seat manufacturing method, it is more ideal that in the sewing step, a sewing clamp is used to sew the main body of the pulling member to the pulling part while holding the rigid part in a state where the rigid part is maintained at a specified distance to the outside of the pulling part relative to the end edge extending along the long side direction of the pulling part.

[0110] In this feature, in the sewing step, since a sewing clamp is used to hold the rigid portion of the pulling piece at a specified distance to the outside of the pulling portion relative to the end edge of the pulling piece, there is no need to provide a mark for positioning the pulling piece on either the pulling piece or the pulling portion, thereby reducing manufacturing costs.

[0111] According to the seat and the manufacturing method thereof of the present embodiment, it is possible to prevent the skin from wrinkling in the curved portion of the pull part, and to improve the workability of the pull fitting installation operation while suppressing the manufacturing cost.

Claims

1. A seat, characterized in that include: liner; An epidermis covering the surface of the pad and having a pulling portion protruding from a side facing the pad toward a direction approaching the pad; as well as, A pulling member fixes the pulling portion to the pad; wherein, The pulling portion has a continuous belt-like shape as a whole, and has a straight portion extending in a straight line and a curved portion extending in a curved line when viewed from a seated person. The pulling member comprises a main body portion in the form of a strip and a rigid part in the form of a line, wherein the main body portion comprises a first edge and a second edge extending along a longitudinal direction, the rigid part has a higher bending rigidity than the main body portion, and is mounted on the first edge along the first edge of the main body portion. The main body of the pulling member overlaps with the pulling portion of the epidermis in the following state: the rigid part extends parallel to the end edge of the pulling portion at a position away from the end edge extending along the longitudinal direction of the pulling portion, and the second edge of the main body overlaps with the epidermis. The main body is sewn to the pulling part continuously from the straight part to the curved part while the rigid part is deformed following the curved part of the pulling part. The rigid portion maintains a state in which the circumference of the end edge of the pulling portion is consistent with that of the pulling portion. The pulling portion is fixed to the pad in a state where the main body of the pulling member is not folded back but extends along the pulling portion. The pulling portion is formed by sewing two adjacent skin parts constituting the skin, and the portion where the main body is sewn to the pulling portion is located closer to the end edge extending in the long side direction of the pulling portion than the portion where the two skin parts in the pulling portion are sewn together. The second edge portion of the main body of the pulling member is in close contact with a skin portion located outside the curved portion of the pulling portion, the skin portion being a surface of the skin on a side facing the pad.

Images