seat pad

Abstract

To obtain a seat pad that can prevent a hook-and-loop fastener at a seat pad side from rolling over to a different hardness boundary groove side when a hook-and-loop fastener at a seat skin side is attached to the hook-and-loop fastener at the seat pad side.SOLUTION: An end part in a sheet width direction outside of a main part 14 of a seat back pad 10 is projectingly formed with a projection wall part 24 which is disposed in the sheet width direction outside from a hook-and-loop fastener 30, and is more projecting than a surface of the hook-and-loop fastener 30. A projection tip 24A of the projection wall part 24 is set in a low position in a projection height direction of the projection wall part 24 compared to an end edge 18 in a sheet width direction inside on a surface of a side part 16.SELECTED DRAWING: Figure 2

Description

【Technical Field】 【0001】 The present invention relates to a seat pad applied to a vehicle seat. 【Background Art】 【0002】 In a seat pad of a vehicle seat, there is a seat pad in which a groove portion is formed at a boundary portion between a main portion constituting a middle portion in the seat width direction and a side portion including a protruding portion for side support that constitutes a portion outside the seat width direction (see, for example, Patent Document 1 below). Further, a configuration in which a hook-and-loop fastener for attaching and detaching the seat skin is disposed at the bottom of such a groove portion is known. 【Prior Art Documents】 【Patent Documents】 【0003】 【Patent Document 1】 Japanese Patent Application Laid-Open No. 2008-188101 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0004】 By the way, in the seat pad, when the side portion is formed of a foamed resin material having a higher hardness than the main portion, a boundary setting wall portion for partitioning foamed resin materials having different hardnesses may be provided in a mold used for molding such a seat pad. Thus, in a configuration in which a different-hardness boundary groove, which is a groove portion at the boundary between the main portion and the side portion, becomes deep, a hook-and-loop fastener for attaching and detaching the seat skin may be integrated with a shelf-shaped portion that is continuous with the different-hardness boundary groove portion and is one step shallower than the different-hardness boundary groove portion. 【0005】 However, in such a configuration, when attaching the hook-and-loop fastener on the seat skin side to the hook-and-loop fastener on the main portion side having a relatively low hardness in the seat pad, the hook-and-loop fastener is likely to roll over to the different-hardness boundary groove side, and thus there is room for improvement in this regard. 【0006】 In consideration of the above facts, the present invention aims to provide a seat pad that can prevent the hook-and-loop fastener on the seat pad side from rolling over toward the boundary groove side of the different hardness when attaching the hook-and-loop fastener on the seat surface side to the hook-and-loop fastener on the seat pad side. [Means for solving the problem] 【0007】 The seat pad of the present invention as described in claim 1 is a seat pad applied to a vehicle seat, comprising: a main portion made of a foamed resin material; a side portion integrally provided on the outer side in the seat width direction relative to the main portion and including a protruding portion for side support, and made of a foamed resin material with a higher hardness than the main portion; a different hardness boundary groove formed in a groove shape recessed from the surface side at the boundary between the main portion and the side portion; a hook-and-loop fastener holding portion provided on the outer side of the main portion in the seat width direction in a portion recessed from the general surface, and a hook-and-loop fastener for attaching and detaching the seat surface integrally provided at a position shallower than the bottom of the different hardness boundary groove; and a protruding wall portion formed protruding from the outer end of the main portion in the seat width direction, provided further outward in the seat width direction than the hook-and-loop fastener, and convex more than the surface of the hook-and-loop fastener. 【0008】 According to the above configuration, the main part is made of foamed resin material, and the side part, which is integrally provided on the outer side in the seat width direction relative to the main part and includes a protruding part for side support, is made of foamed resin material with a higher hardness than the main part. A recessed boundary groove of different hardness is formed at the boundary between the main part and the side part, with the surface side facing outwards. Furthermore, in the part of the main part that is recessed compared to the general surface on the outer side in the seat width direction, a hook-and-loop fastener holding part is provided, with a hook-and-loop fastener for attaching and detaching the seat cover integrally provided at a position shallower than the bottom of the boundary groove of different hardness. Here, at the outer end of the main part in the seat width direction, a protruding wall is formed which is provided further outwards in the seat width direction than the hook-and-loop fastener and is convex compared to the surface of the hook-and-loop fastener. Therefore, when attaching the hook-and-loop fastener on the seat cover side to the hook-and-loop fastener on the seat pad side, it is possible to prevent the hook-and-loop fastener on the seat cover side from shifting and being pressed against the hook-and-loop fastener on the seat pad side toward the boundary groove of different hardness, thereby preventing the hook-and-loop fastener on the seat pad side from tilting toward the boundary groove of different hardness and tipping over. 【0009】 The seat pad of the present invention as described in claim 2, in the configuration described in claim 1, wherein the protruding tip of the protruding wall portion is set at a lower position in the direction of the protruding height of the protruding wall portion compared to the inner edge in the seat width direction on the surface of the side portion, and is set to contact the seat surface when the seat surface is positioned on the pad surface side using the hook-and-loop fastener. 【0010】 According to the above configuration, when the seat surface is positioned on the pad surface side using hook-and-loop fasteners and tension is applied to the seat surface, the seat surface can be elastically supported by the protruding wall portion, which has lower hardness compared to the side portion. This suppresses the occurrence of unwanted highlight lines on the surface of the seat surface caused by the seat surface contacting the inner edge in the seat width direction on the surface of the side portion. 【0011】 The seat pad of the present invention as described in claim 3 is configured as described in claim 2, wherein the protruding tip of the protruding wall portion is configured to be crushed when it comes into contact with the seat surface when the seat surface is positioned on the pad surface side using the hook-and-loop fastener. 【0012】 According to the above configuration, when the seat cover is positioned on the pad surface side using hook-and-loop fasteners, the protruding tip of the protruding wall is crushed by contact with the seat cover, making it difficult to see from the surface side of the seat cover that the seat cover is in contact with the protruding tip of the protruding wall. 【0013】 The seat pad of the present invention as described in claim 4 is configured as described in claim 2, wherein the protruding wall portion is tilted toward the side portion when the seat surface is positioned on the pad surface side using the hook-and-loop fastener, and the protruding tip portion comes into contact with the seat surface. 【0014】 With the above configuration, when the seat cover is positioned on the pad surface side using hook-and-loop fasteners, the protruding tip of the protruding wall comes into contact with the seat cover, causing the protruding wall to tilt towards the side. Therefore, when viewed from the surface side of the seat cover, it is difficult to see that the seat cover is in contact with the protruding tip of the protruding wall. 【0015】 The seat pad of the present invention as described in claim 5 has the configuration described in claim 2, wherein at least the portion of the protruding tip surface of the protruding wall portion opposite to the side portion is formed in a convex curved shape. 【0016】 According to the above configuration, when tension is applied to the seat surface using hook-and-loop fasteners and the seat surface is in contact with the protruding tip surface of the protruding wall, it becomes difficult to see from the surface side of the seat surface that the seat surface is in contact with the protruding tip of the protruding wall. [Effects of the Invention] 【0017】 As described above, according to the seat pad of the present invention, when attaching the surface fastener on the seat skin side to the surface fastener on the seat pad side, it is possible to prevent the surface fastener on the seat pad side from rolling over to the side of the different hardness boundary groove, which has an excellent effect. 【Brief Description of the Drawings】 【0018】 [Figure 1] It is a perspective view showing the seat back pad according to an embodiment of the present invention as viewed from the front, obliquely downward. [Figure 2] It is an enlarged cross-sectional view showing an enlarged state of the cut-along state of the line 2-2 in FIG. 1. [Figure 3] It is a cross-sectional view showing a state where a seat back skin is attached to the component shown in FIG. 2. [Figure 4] It is a perspective view showing an enlarged state of the surface fastener holding portion and its peripheral portion of the seat back pad in FIG. 1 and viewed from a direction different from that of FIG. 1. [Figure 5] It is a cross-sectional view showing a state where a seat back skin is attached in the proportionality. 【Modes for Carrying Out the Invention】 【0019】 The seat pad according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5. In each figure, some reference numerals may be omitted for the sake of easy viewing of the drawings. 【0020】 (Configuration of the Embodiment) FIG. 1 shows a perspective view of a seat back pad 10 as a seat pad applied to a vehicle seat, viewed from the front lower diagonal side. In FIG. 1, arrow UP indicates the upper side (upper side in the seat back vertical direction) of the seat back pad 10, and arrow W indicates the width direction (seat width direction) of the seat back pad 10. The seat back pad 10 includes a seat back pad body 12 made of a foamed resin. The seat back pad body 12 constitutes a cushion material for the seat back and is covered on a seat back frame (not shown). The seat back constitutes the backrest portion of the vehicle seat for the seated occupant, and the seat back frame constitutes the skeleton portion of the seat back. The seat back pad 10 is covered with a seat back skin (trim cover) 40 (see FIG. 3) as a seat skin. 【0021】 The seat back pad body 12 includes a main portion 14 that supports the back and waist of the seated occupant from the rear side, and left and right side portions 16 that are integrally provided outside the seat width direction with respect to the main portion 14. The side portion 16 includes a side support protruding portion 16A that protrudes forward in the seat front-rear direction from the main portion 14 and supports the back and waist of the seated occupant from the side. Both the main portion 14 and the side portion 16 are formed of a foamed resin material, but the side portion 16 is formed of a foamed resin material with a higher hardness than the main portion 14 in order to improve the holding property from the perspective of riding comfort. 【0022】 At the boundary between the main portion 14 and the side portion 16, a different hardness boundary groove 20 formed in a groove shape by being recessed from the surface side is provided. To supplement the explanation, the mold (not shown) used for molding the seat back pad 10 is provided with a boundary setting wall portion (not shown) for partitioning foamed resin materials with different hardnesses. By this boundary setting wall portion, a deep different hardness boundary groove 20 is formed at the boundary between the main portion 14 and the side portion 16. <> 【0023】 Figure 2 shows an enlarged cross-sectional view taken along the line 2-2 in Figure 1. As shown in Figure 2, in a cross-sectional view perpendicular to the longitudinal direction of the differential hardness boundary groove 20, the surface of the side portion 16 has an inclined surface 16B that slopes downward toward the main portion 14. In addition, in the outer portion of the main portion 14 in the seat width direction, a hook-and-loop fastener holding portion 22 is provided at a position shallower than the bottom portion 20A of the differential hardness boundary groove 20, and a hook-and-loop fastener 30 for attaching and detaching the seat back surface 40 (see Figure 3) is integrally provided. 【0024】 The hook-and-loop fastener 30 is, for example, a male hook-and-loop fastener and comprises a strip-shaped base portion 30A with a plurality of engaging elements 30C (schematically shown in the figure) on its front side, and an anchor portion 30B provided on the back side of the base portion 30A and embedded in the seat back pad 10. As shown in Figure 1, the hook-and-loop fastener 30 is, for example, provided on the left and right sides of the upper part of the seat back pad 10 and extends along the vertical direction of the seat back pad 10 (more precisely, slightly inclined outward in the seat width direction toward the upper side of the seat back). 【0025】 Figure 3 shows a cross-sectional view of the seat back surface 40 attached to the components shown in Figure 2. As shown in Figure 4, in this embodiment, a female hook-and-loop fastener 42 is attached to the back side of the seat back surface 40 as an example. The attachment portion of the hook-and-loop fastener 42 is provided on both sides in the seat width direction and is sewn to the seam between the two surface materials 40A and 40B of the seat back surface 40. The main body of the hook-and-loop fastener 42 has an engagement portion that can engage with the engagement element 30C (see Figure 2) of the hook-and-loop fastener 30. For convenience, the engagement state between the engagement element 30C (see Figure 2) of the hook-and-loop fastener 30 and the engagement portion of the hook-and-loop fastener 42 is simplified and schematically shown in the figures. Furthermore, since known configurations of hook-and-loop fasteners 30 and 42 can be used, a detailed explanation of hook-and-loop fasteners 30 and 42 is omitted. 【0026】 Figure 4 shows a magnified perspective view of the hook-and-loop fastener holding portion 22 and its surrounding area of ​​the seat back pad 10, viewed from a different direction than in Figure 1. Note that in Figures 1 and 4, the hook-and-loop fastener 30 is shown in a simplified form, and the engagement element 30C (see Figure 2) is not shown. 【0027】 As shown in Figures 2 and 4, a protruding wall portion 24 is formed at the outer end of the main portion 14 of the seat back pad 10 in the seat width direction, extending further outward than the hook-and-loop fastener 30 and protruding more than the surface of the hook-and-loop fastener 30. The protruding tip surface 24S of the protruding wall portion 24 is formed in a convex curved shape. 【0028】 As shown in Figure 2, the protruding tip 24A of the protruding wall portion 24 is set at a lower position in the height direction of the protrusion of the protruding wall portion 24 compared to the inner edge 18 in the seat width direction on the surface of the side portion 16, and is set to contact the seat back surface 40 when the seat back surface 40 is positioned on the surface side of the seat back pad 10 using the hook-and-loop fastener 30 as shown in Figure 3. 【0029】 Here, the protruding tip 24A of the protruding wall portion 24 is configured to collapse when it comes into contact with the seat back surface 40 when the seat back surface 40 is positioned on the surface side of the seat back pad 10 using the hook-and-loop fastener 30. Furthermore, the protruding wall portion 24 is configured to tilt toward the side portion 16 when the protruding tip 24A comes into contact with the seat back surface 40 when the seat back surface 40 is positioned on the surface side of the seat back pad 10 using the hook-and-loop fastener 30. 【0030】 Furthermore, in this embodiment, as an example, as shown in Figure 2, the amount of protrusion of the protruding wall portion 24 is set such that, in a cross-sectional view perpendicular to the longitudinal direction of the differential hardness boundary groove 20, the extension line of the inclined surface 16B of the side portion 16 (the line passing through the straight line L of the dashed-dot line) passes through the center of the protruding tip surface 24S of the protruding wall portion 24. As a modification of this embodiment, a configuration may be adopted in which the extension line of the inclined surface (16B) of the side portion (16) does not pass through the center of the protruding tip surface (24S) of the protruding wall portion (24). 【0031】 (Effects and mechanisms of the embodiment) Next, the operation and effects of this embodiment will be described. 【0032】 In this embodiment, a protruding wall portion 24 is formed at the outer end of the main portion 14 of the seat back pad 10 in the seat width direction, located further outward than the hook-and-loop fastener 30 in the seat width direction and convex more than the surface of the hook-and-loop fastener 30. Therefore, when attaching the hook-and-loop fastener 42 on the seat back surface 40 side to the hook-and-loop fastener 30 on the seat back pad 10 side, as shown in Figure 3, it is possible to prevent the hook-and-loop fastener 42 on the seat back surface 40 side from shifting and being pressed against the hook-and-loop fastener 30 on the seat back pad 10 side toward the differential hardness boundary groove 20 side, thereby preventing the hook-and-loop fastener 30 on the seat back pad 10 side from tilting toward the differential hardness boundary groove 20 side and tipping over. 【0033】 Furthermore, the presence of the protruding wall portion 24 makes it easier to visually and tactilely identify the attachment position of the hook-and-loop fastener 42 when attaching the hook-and-loop fastener 42 on the seat back surface 40 to the hook-and-loop fastener 30 on the seat back pad 10. Therefore, the ease of installation of the seat back surface 40 can be improved. 【0034】 Furthermore, in this embodiment, as shown in Figure 2, the protruding tip 24A of the protruding wall portion 24 is set at a lower position in the protruding height direction of the protruding wall portion 24 compared to the inner edge 18 in the seat width direction on the surface of the side portion 16, and is set to contact the seat back surface 40 when the seat back surface 40 is placed on the surface side of the seat back pad 10 using the hook-and-loop fastener 30 as shown in Figure 3. As a result, when the seat back surface 40 is placed on the surface side of the seat back pad 10 using the hook-and-loop fastener 30 and tension is applied to the seat back surface 40, the seat back surface 40 can be elastically supported by the protruding wall portion 24, which has lower hardness than the side portion 16. Therefore, it is possible to suppress the occurrence of unwanted highlight lines on the surface of the seat back surface 40 due to the seat back surface 40 contacting the inner edge 18 in the seat width direction on the surface of the side portion 16. In other words, the appearance quality can be improved. 【0035】 Furthermore, in this embodiment, when the seat back surface 40 is positioned on the surface side of the seat back pad 10 using the hook-and-loop fastener 30, the protruding tip 24A of the protruding wall portion 24 comes into contact with the seat back surface 40, causing the protruding tip 24A of the protruding wall portion 24 to be crushed and the protruding wall portion 24 to tilt toward the side portion 16. Therefore, when viewed from the surface side of the seat back surface 40, it is difficult to see that the seat back surface 40 is in contact with the protruding tip 24A of the protruding wall portion 24. 【0036】 Here, we will provide supplementary explanations with reference to Figure 5, a cross-sectional view illustrating proportionality. The seat back pad 100 relating to proportionality shown in Figure 5 differs from the seat back pad 10 of this embodiment (see Figure 3) in that it does not have the protruding wall portion 24 (see Figure 3) of this embodiment, and the hook-and-loop fastener 30 is positioned adjacent to the differential hardness boundary groove 20. For convenience, components in Figure 5 that are substantially the same as those in this embodiment are denoted by the same reference numerals. 【0037】 In the proportional relationship shown in Figure 5, the seat back surface 40 abuts against the inner edge 18 in the seat width direction on the surface of the side portion 16, resulting in unwanted highlight lines appearing on the surface of the seat back surface 40 at the point indicated by arrow A. In contrast, in this embodiment shown in Figure 3, the seat back surface 40 can be elastically supported by the protruding wall portion 24, which has lower hardness than the side portion 16, thus suppressing the generation of highlight lines (in other words, blurring the highlights). 【0038】 Furthermore, to provide additional explanation regarding the inclination of the protruding wall portion 24 toward the side portion 16, in this embodiment, since the deep differential hardness boundary groove 20 is formed adjacent to the outer side of the protruding wall portion 24 in the sheet width direction, the protruding wall portion 24 tends to inclinate toward the outer side of the sheet width direction, i.e., toward the side portion 16. Moreover, since the hook-and-loop fastener holding portion 22 adjacent to the protruding wall portion 24 on the inner side in the sheet width direction is provided at a shallower position than the bottom portion 20A of the differential hardness boundary groove 20 adjacent to the outer side of the sheet width direction relative to the protruding wall portion 24, the protruding wall portion 24 tends to inclinate even more toward the outer side of the sheet width direction, i.e., toward the side portion 16. 【0039】 Furthermore, as shown in Figure 2, in this embodiment, the protruding tip surface 24S of the protruding wall portion 24 is formed in a convex curved shape. As a result, as shown in Figure 3, when tension is applied to the seat back surface 40 while it is positioned on the surface side of the seat back pad 10 using the hook-and-loop fastener 30, and the seat back surface 40 is supported by the protruding tip portion 24A of the protruding wall portion 24, it becomes even more difficult to see from the surface side of the seat back surface 40 that the seat back surface 40 is in contact with the protruding tip portion 24A of the protruding wall portion 24. 【0040】 (Supplementary explanation of the embodiment) Furthermore, as a modification of the above embodiment shown in Figures 1 to 4, a configuration can be adopted in which only the portion of the protruding tip surface of the protruding wall portion (24) opposite to the side portion (16) is formed in a convex curved shape. In addition, as another modification, a configuration can be adopted in which the protruding tip surface of the protruding wall portion (24) is not convex curved. 【0041】 Furthermore, as a modification of the above embodiment, the protruding tip of the protruding wall portion (24) is set to a position where it does not come into contact with the seat back surface (40) when the seat back surface (40) is positioned on the surface side of the seat back pad (10) using hook-and-loop fasteners (30). 【0042】 Furthermore, as a variation of the above embodiment, a configuration can be adopted in which the seat back surface (40) is positioned on the surface side of the seat back pad (10) using hook-and-loop fasteners (30), and when the protruding tip (24A) of the protruding wall portion (24) comes into contact with the seat back surface (40), the protruding tip (24A) of the protruding wall portion (24) is not crushed, but rather the protruding wall portion (24) tilts toward the side portion (16). 【0043】 Furthermore, as another variation, a configuration can be adopted in which the seat back surface (40) is positioned on the surface side of the seat back pad (10) using hook-and-loop fasteners (30), and when the protruding tip (24A) of the protruding wall (24) comes into contact with the seat back surface (40), the protruding wall (24) does not tilt towards the side (16), but the protruding tip (24A) of the protruding wall (24) is crushed. 【0044】 Furthermore, as a variation of the above embodiment, the hook-and-loop fastener (30) integrally provided with the hook-and-loop fastener holding portion (22) of the seat back pad (10) may be a female hook-and-loop fastener, and the hook-and-loop fastener (42) provided on the back side of the seat back surface (40) may be a male hook-and-loop fastener. 【0045】 Furthermore, although the above embodiment described a case in which the seat pad of the present invention is applied to a seat back pad 10, the seat pad of the present invention may also be applied to a seat cushion of a vehicle seat. 【0046】 Furthermore, the above embodiments and the various modifications described above can be combined as appropriate. 【0047】 Although an example of the present invention has been described above, the present invention is not limited to the above, and it is of course possible to implement it in various ways without departing from its spirit. [Explanation of symbols] 【0048】 10 Seat back pads (seat pads) 14 Main section 16 Side section 16A protrusion 18. The inner edge in the sheet width direction on the surface of the side portion. 20 Different hardness boundary groove 20A Bottom of the differential hardness boundary groove 22. Hook and loop fastener retaining part 24 Projecting wall part 24A Protruding tip 24S protruding tip surface 30 hook-and-loop fasteners

Claims

[Claim 1] A seat pad applied to a vehicle seat, The main part is made of foamed resin material, A side portion is integrally provided on the outer side in the width direction of the seat relative to the main portion, includes a protruding portion for side support, and is made of a foamed resin material with higher hardness than the main portion. A boundary groove of different hardness is formed at the boundary between the main portion and the side portion, recessed from the surface side and forming a groove shape, A hook-and-loop fastener holding portion is provided in the outer portion of the main section in the width direction of the seat, in a recessed area compared to the general surface, and is integrally provided with a hook-and-loop fastener for attaching and detaching the seat cover at a position shallower than the bottom of the differential hardness boundary groove. A protruding wall portion is formed at the outer end of the main portion in the sheet width direction, and is provided further outward in the sheet width direction than the hook-and-loop fastener, and is more convex than the surface of the hook-and-loop fastener. A seat pad equipped with [features / equipment]. [Claim 2] The seat pad according to claim 1, wherein the protruding tip of the protruding wall portion is set at a lower position in the direction of the protruding height of the protruding wall portion compared to the inner edge in the width direction of the seat on the surface of the side portion, and is set to contact the seat surface when the seat surface is positioned on the pad surface side using the hook-and-loop fastener. [Claim 3] The seat pad according to claim 2, wherein the protruding tip of the protruding wall portion is configured to be crushed when it comes into contact with the seat surface when the seat surface is positioned on the pad surface side using the hook-and-loop fastener. [Claim 4] The seat pad according to claim 2, wherein the protruding wall portion is configured to tilt toward the side portion when the seat surface is positioned on the pad surface side using the hook-and-loop fastener, by the protruding tip portion contacting the seat surface. [Claim 5] The seat pad according to claim 2, wherein at least the portion of the protruding tip surface of the protruding wall portion opposite to the side portion is formed in a convex curved shape.

Images