seat pad

Abstract

To provide a seat pad capable of appropriately suspending a seat cover along a curved part of a suspending groove.SOLUTION: A back pad 10 (seat pad) is provided on a pad surface with a stripe-shaped suspending groove 11 where a back cover 20 (seat cover) is suspended. The back pad 10 has a clip 12 which is fixed to a groove inside part of the suspending groove 11 and fixes a linear suspending wire 22B arranged along a sewing part of the back cover 20 at a plurality of parts in a groove length direction. The suspending groove 11 has: a curved part C curved along the pad surface; and a swelling part 11D which swells so as to partially clip a groove width between an inner peripheral wall and an outer peripheral wall of the curved part C. The swelling part 11D facilitates curve of the suspending wire 22B along a curve of the curved part C by pressing the suspending wire 22B suspended in the groove inside part of the curved part C from an inner peripheral side of the curve.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a seat pad, and more particularly to a seat pad having a slit on the surface thereof for suspending a seat cover. [Background technology]

[0002] Patent Document 1 discloses a seat pad with linear suspension grooves that allow a seat cover to be suspended from the surface of the pad. The suspension grooves extend linearly along the surface of the seat pad, with fastening clips embedded in various locations. The suspension grooves hold the seat cover suspended along the direction of the grooves by pulling strip-shaped suspenders sewn to the seat cover into the grooves and fastening them to the clips. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-088365 Summary of the Invention [Problem to be solved by the invention]

[0004] When the suspension groove has a curved portion that curves along the surface of the pad, the restoring force exerted by the suspenders between the clips at the curved portion may cause the suspenders to stretch in a shape that does not follow the curve of the curved portion. If the suspenders, which are intended to be suspended in a curved shape, become stretched, wrinkles will form in the seams of the seat cover that is sewn to curve along the suspenders. Therefore, the present invention provides a seat pad that allows the seat cover to be properly suspended along the curved portion of the suspension groove. [Means for solving the problem]

[0005] To solve the above problems, the seat pad of the present invention takes the following measures: That is, a first aspect of the present invention is a seat pad having a linear suspension groove on its surface into which a seat cover is suspended, the seat pad having fastening members fixed inside the suspension groove and fastening linear suspension wires provided along seams of the seat cover at multiple locations in the groove length direction, the suspension groove having a curved portion that curves along the pad surface and a bulging portion that bulges so as to partially narrow the groove width between the inner and outer peripheral walls of the curved portion, the bulging portion pressing against the suspension wire suspended inside the groove of the curved portion from the inner peripheral side of the curve, thereby helping the suspension wire to curve along the curve of the curved portion.

[0006] According to the first aspect of the present invention, the suspension wire of the seat cover that is pulled into the curved portion can be pressed along the curve of the curved portion by the bulging portion that bulges out from the inner peripheral wall of the curved portion against the restoring force that tries to straighten it, thereby allowing the seat cover to be properly suspended along the curved portion of the suspension groove.

[0007] A second aspect of the present invention is a seat pad according to the first aspect, wherein the bulging portion is formed in a middle portion of the curved portion, leaving both ends of the curve remaining.

[0008] According to the second aspect of the present invention, the bulging portion allows the suspension wire of the seat cover to bend so as to more appropriately follow the curved portion.

[0009] The third invention of the present invention is a seat pad according to the second invention, wherein the bulging portion has a cylindrical shape in which the end faces on both sides in the groove length direction rise in a stepped manner from the inner wall and bulge with the same cross section throughout the entire thickness direction.

[0010] According to the third aspect of the present invention, the bulging portion is shaped to bulge out in a stepped manner from the inner peripheral wall of the curved portion, thereby enabling an effective pressing force to be applied to the suspension wire over the entire area in the groove length direction. Also, the bulging portion is shaped to bulge out in a cylindrical manner, enabling the suspension wire to be appropriately pressed from the inner peripheral side at any position in the thickness direction. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a front view of a seat back to which a seat pad according to a first embodiment is applied. [Figure 2] FIG. [Figure 3] FIG. 1 is a perspective view of suspenders sewn to a seat cover. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. [Figure 5] FIG. 2 is a cross-sectional view taken along line VV in FIG. [Figure 6] FIG. 2 is an enlarged view showing the main part of FIG. 1 with the seat cover omitted. [Figure 7] FIG. 7 is an enlarged view of part VII in FIG. 6. [Figure 8] FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. 7. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0013] First Embodiment <Configuration of seat pad (back pad 10)> First, the configuration of a seat pad (back pad 10) according to a first embodiment of the present invention will be described with reference to Figures 1 to 8. In the following description, when directions such as front, back, up, down, left, and right are indicated, they refer to the directions shown in each drawing. In the following description, when a specific reference drawing is not indicated or when there is no reference symbol corresponding to a reference drawing, any of Figures 1 to 8 will be referred to as appropriate.

[0014] As shown in Fig. 1, the seat pad according to this embodiment is configured as a cushion pad (back pad 10) that constitutes the seat back 1 of an automobile seat. The seat back 1 has a metal frame-like back frame (not shown) that forms the framework of the seat back, and a back pad 10 made of urethane foam that is attached to the front of the back frame and elastically supports the back of a seated occupant from behind.

[0015] The seat back 1 also has a fabric back cover 20 that is placed over the back pad 10 and a back frame (not shown) from above to cover the entire surface of the seat back 1. Here, the back cover 20 corresponds to the "seat cover" of the present invention. The back cover 20 may be made of leather material such as synthetic leather or natural leather.

[0016] The back pad 10 is assembled by covering the entire frame of a back frame (not shown) from the front. The back cover 20 is made up of multiple cover pieces sewn together. After the back pad 10 is assembled to the back frame (not shown), the back cover 20 is placed over the back pad 10 to encase them, with various terminals fastened to the back frame. As a result, the back cover 20 is stretched over the surface of the back pad 10 and presses the back pad 10 against the back frame (not shown) to fix it in place.

[0017] Specifically, the back cover 20 is hung in a hanging groove 11 formed on the pad surface of the back pad 10 at a seam 21 between the cover pieces at the top plate portion (front surface) of the back pad 10. The hanging groove 11 is formed on the top plate portion of the back pad 10 in a strip-like shape that forms a U-shape when viewed from the front (see FIG. 2). The seam 21 of the back cover 20 is also formed in a shape that corresponds to the shape of the hanging groove 11, with a stitch line extending in a U-shape when viewed from the front.

[0018] By hanging the back cover 20 as described above, it is stretched over the top panel of the back pad 10 in a good appearance without floating or wrinkling. The structure for hanging and fastening the back cover 20 in the hanging groove 11 of the back pad 10 is as follows. That is, as shown in Fig. 3, the back cover 20 has suspenders 22 for hanging sewn together with the seam 21 on the back side of the cover.

[0019] The suspenders 22 have a composite structure including a strip-shaped hanging cloth 22A extending along the seam 21 and a resin hanging wire 22B integrally molded to extend in a strip-like manner along the end of the hanging cloth 22A. The hanging wire 22B has an arrowhead-shaped cross section that tapers toward the tip. In the free state before being sewn to the seam 21, the suspenders 22 are held in a straight, taut state by the restoring force of the hanging wire 22B.

[0020] However, the suspenders 22 are sewn along the seams 21 so as to form a U-shape when viewed from the front, and are attached in a state in which they exert a restoring force on the seams 21. The suspenders 22 are attached so as to extend continuously along the seams 21 in a U-shape when viewed from the front.

[0021] As shown in Fig. 2, the back pad 10 is configured such that resin clips 12 serving as fastening members are partially embedded in various locations along the length direction (extension direction) of the hanging grooves 11 formed on the surface of the pad. Here, each clip 12 corresponds to the "fastening member" of the present invention. As shown in Fig. 4, each clip 12 is integrally formed with a flat seat portion 12A embedded in the bottom surface portion 11C of the hanging groove 11 and a pair of hooks 12B each having a symmetrical hook shape extending from the seat portion 12A into the interior of the hanging groove 11.

[0022] Each clip 12 is set in a foam molding mold for the back pad 10, and the back pad 10 is foam-molded together with the clips 12, so that the seat portions 12A are molded in a state where they are integrally embedded in the bottom portions 11C of the hanging grooves 11. The back cover 20 is fastened by suspending the suspenders 22 in the hanging grooves 11 of the back pad 10 as follows: First, the suspenders 22 sewn to the seams 21 of the back cover 20 are pulled into the hanging grooves 11, and the hanging wires 22B are pushed between the hooks 12B of each clip 12 inside the grooves.

[0023] As a result, the suspenders 22 snap-fit ​​into the hooks 12B of each clip 12 and are fastened inside the hanging groove 11. As shown in Fig. 2, a plurality of clips 12 are arranged in a line in the groove length direction on each vertical side and horizontal side of the hanging groove 11, which is U-shaped when viewed from the front. Therefore, at each location where each clip 12 is arranged, the suspenders 22 can be fastened inside the hanging groove 11, as shown in Fig. 4.

[0024] Furthermore, by fastening with each clip 12, as shown in Fig. 5, suspenders 22 pulled into other parts of the hanging groove 11 can also be fastened inside the hanging groove 11. Therefore, as shown in Fig. 6, the suspenders 22 can be fastened inside the hanging groove 11 by bending them into a U-shape in front view along the shape of the hanging groove 11, which is U-shaped in front view.

[0025] The hanging groove 11 has a U-shaped configuration in which the left and right lower corners connecting the left and right vertical and horizontal sides are curved portions C that curve along the surface of the pad. Due to the installation space constraints associated with these curves, the above-mentioned clips 12 are not placed in these curved portions C.

[0026] Therefore, when the suspenders 22 are pulled into these curved portions C, the restoring force of the hanging wires 22B causes them to try to stretch straight, and a pressing force is generated that presses the suspenders 22 against the inner peripheral wall 11A and the outer peripheral wall 11B of each curved portion C. If this pressing force causes the hanging wires 22B to stretch in a shape that does not follow the curve of each curved portion C, there is a concern that the stitching 21 of the back cover 20 that is sewn to the hanging wires 22B may lift or wrinkle.

[0027] 7, each curved portion C has a bulging portion 11D formed in the middle near the apex of the curve that bulges out from the inner circumferential wall 11A and presses the suspension wires 22B from the inner circumferential side, thereby suppressing the restoration deformation of the suspension wires 22B. These bulging portions 11D allow the suspenders 22 drawn into each curved portion C to be bent appropriately to match the curve of the curved portion C.

[0028] The specific configuration of each bulging portion 11D will be described below. Note that since each curved portion C has a shape that is bilaterally symmetrical to one another, the shape of the curved portion C and bulging portion 11D on the right side shown in Fig. 7 will be described in detail below as a representative.

[0029] The curved portion C has a groove shape that curves at a substantially constant curvature along the pad surface. The curved portion C has a groove shape in which its groove width W is substantially constant except for the portion where the bulging portion 11D is formed. The bulging portion 11D has a shape that bulges from the inner circumferential wall 11A in a middle portion of the curved portion C, leaving both ends of the curve, toward the outer circumferential wall 11B.

[0030] By forming bulge 11D at the above position, it is possible to press suspension wire 22B from the inner peripheral side near the apex of the curve of curved portion C. Therefore, suspension wire 22B can be bent to more appropriately fit along curved portion C. Furthermore, by forming bulge 11D so that it does not catch on either end of the curve of curved portion C, clip 12 placed on the vertical or horizontal side of suspension groove 11 can be placed close to curved portion C so as not to catch on bulge 11D.

[0031] The bulging portion 11D has end faces D1 on both sides in the groove length direction that rise in a stepped shape from the inner circumferential wall 11A of the curved portion C. The bulging portion 11D bulges from the inner circumferential wall 11A of the curved portion C to a position that is approximately half the groove width W of the curved portion C. An inner circumferential surface D2 at the bulge end of the bulging portion 11D is shaped to curve along the outer circumferential wall 11B of the curved portion C. As shown in FIG. 8, the curved portion C has a cylindrical shape that bulges with the same cross section throughout its thickness direction.

[0032] By making the bulging portion 11D bulge out in a stepped shape from the inner peripheral wall 11A of the curved portion C, it is possible to apply an effective pressing force to the suspension wire 22B over the entire area in the groove length direction. Also, by making the bulging portion 11D bulge out in a cylindrical shape, it is possible to appropriately press the suspension wire 22B from the inner peripheral side at any position in the thickness direction.

[0033] Therefore, by the pressure from the bulging portion 11D, the hanging wire 22B can be appropriately curved to match the curvature of the curved portion C. As a result, the back cover 20 can be stretched in a good appearance without causing any lifting or wrinkles at the seam 21.

[0034] To summarize the above, the seat pad (back pad 10) according to this embodiment has the following configuration: Note that the reference numerals in parentheses below correspond to the respective components shown in the above embodiment.

[0035] That is, the seat pad (10) has a linear hanging groove (11) on the surface of the pad, into which the seat cover (20) is hung. The seat pad (10) has fastening members (12) that are fixed inside the hanging groove (11) and fasten linear hanging wires (22B) that are provided along the seams (21) of the seat cover (20) at multiple points in the groove length direction.

[0036] The hanging groove (11) has a curved portion (C) that curves along the pad surface, and a bulging portion (11D) that bulges out so as to partially narrow the groove width (W) between the inner peripheral wall (11A) and the outer peripheral wall (11B) of the curved portion (C). The bulging portion (11D) presses the hanging wire (22B) that is hung inside the groove of the curved portion (C) from the inner peripheral side of the curve, thereby helping the hanging wire (22B) to curve along the curve of the curved portion (C).

[0037] According to the above configuration, the suspension wire (22B) of the seat cover (20) pulled into the curved portion (C) can be pressed along the curve of the curved portion (C) by the bulging portion (11D) bulging from the inner peripheral wall (11A) of the curved portion (C) against the restoring force that tries to straighten the suspension wire (22B). This allows the seat cover (20) to be properly suspended along the curved portion (C) of the suspension groove (11).

[0038] In addition, the bulging portion (11D) is formed in the middle portion of the curved portion (C) leaving both ends of the curve. According to the above configuration, the bulging portion (11D) allows the suspension wire (22B) of the seat cover (20) to bend more appropriately along the curved portion (C).

[0039] Furthermore, the bulging portion (11D) has end faces (D1) on both sides in the groove length direction rising in a stepped manner from the inner peripheral wall (11A) and has a cylindrical shape that bulges with the same cross section over the entire thickness direction. According to the above configuration, the bulging portion (11D) has a stepped shape bulging from the inner peripheral wall (11A) of the curved portion (C), which allows an effective pressing force to be applied to the suspension wire (22B) over the entire groove length direction. Furthermore, the bulging portion (11D) has a cylindrical bulging shape, which allows the suspension wire (22B) to be appropriately pressed from the inner peripheral side at any position in the thickness direction.

[0040] Other Embodiments Although one embodiment of the present invention has been described above, the present invention can be embodied in various forms as described below in addition to the above embodiment.

[0041] 1. The seat pad of the present invention can be used as a cushion pad for seat backs and also as a cushion pad for seat cushions. The seat pad can be used for automobile seats as well as seats for vehicles other than automobiles, such as trains, airplanes, and ships. The seat pad can also be used for seats other than vehicles, such as spectator seats and massage seats installed in various facilities, including sports facilities, theaters, concert halls, and event venues.

[0042] 2. The fastening member fixed inside the suspension groove may be configured to fasten a linear suspension wire provided along the seam of the seat cover at multiple locations in the groove length direction. For example, the fastening member may be a suspension wire (edge ​​wire) extending along the inside of the suspension groove. In other words, the fastening member may be a suspension wire that fastens the suspension wire provided along the seam of the seat cover by caulking a hog ring (C-ring) using a hog ringer.

[0043] 3. The bulging portions may be divided into a plurality of bulges extending from the inner peripheral wall of the curved portion in the groove length direction. The bulging shape of the bulging portions may be tapered or widened. The bulging portions may be formed at both ends of the curve of the curved portion, but not in the middle. The bulging portions may be formed over the entire length of the curved portion, narrowing the groove width more than the groove width outside the curved portion. [Explanation of symbols]

[0044] 1 seat back 10 Back pad (seat pad) 11 Hanging groove 11A Inner wall 11B Outer wall 11C Bottom part 11D bulge 12 Clip (fastening member) 12A Seat part 12B hook 20 Back cover (seat cover) 21 Suture area 22 Suspenders 22A Hanging Cotton Cloth 22B suspension wire D1 end face D2 Inner surface W Groove width C curved section

Claims

1. A seat pad having a slit-shaped suspension groove on the surface of the pad into which the seat cover is suspended, A fastening member is provided inside the hanging groove and fastens a linear hanging wire provided along the seam of the seat cover at a plurality of points in the groove length direction, the suspension groove has a curved portion that curves along the surface of the pad, and a bulging portion that bulges so as to partially narrow the groove width between the inner peripheral wall and the outer peripheral wall of the curved portion, A seat pad in which the bulge portion presses the suspension wire suspended inside the groove of the curved portion from the inner side of the curve, thereby helping the suspension wire to curve along the curve of the curved portion.

2. 2. The seat pad according to claim 1, The seat pad has a bulging portion formed in a middle portion of the curved portion, which is left at both ends of the curve.

3. 3. The seat pad according to claim 2, The bulging portion has end faces on both sides in the groove length direction that rise in a stepped manner from the inner peripheral wall, and has a cylindrical shape that bulges with the same cross section over the entire thickness direction of the seat pad.

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