JP5502297B2

JP5502297B2 - Seat pad

Info

Publication number: JP5502297B2
Application number: JP2008215572A
Authority: JP
Inventors: 豊平田; 正則奥村; 泰輔米澤
Original assignee: Bridgestone Corp
Current assignee: Bridgestone Corp
Priority date: 2008-08-25
Filing date: 2008-08-25
Publication date: 2014-05-28
Anticipated expiration: 2028-08-25
Also published as: JP2010046409A

Description

本発明は車両などに用いられるシートパッドに係り、特に座面及び前面の少なくとも一方の表層部が柔軟とされたシートパッドに関する。 The present invention relates to a seat pad used for a vehicle or the like, and more particularly, to a seat pad in which at least one surface layer portion of a seating surface and a front surface is flexible.

車両用シートパッドとして、腿下部におけるパッド表層部を柔らかくし、その下側の部分を比較的剛性の高い素材で構成した異硬度パッドが用いられることがある。特開平９−２７１４２３には、スラブフォーム（同号公報では、「ウレタンフォームブロック体より所定の大きさに切り出されたパッド表層部」と記載されている。）をパッド本体の腿下部に嵌め込んで一体化させた車両用シートパッドが記載されている。 As a vehicle seat pad, a different hardness pad in which a pad surface layer portion in a lower thigh is softened and a lower portion thereof is made of a material having relatively high rigidity may be used. In Japanese Patent Laid-Open No. 9-271423, a slab foam (in the same publication, described as “a pad surface layer portion cut out to a predetermined size from a urethane foam block body”) is fitted into the lower thigh of the pad body. The vehicle seat pad integrated with is described.

特開２００４−２１５８１０には、パッドの座面に空調用空気を吹き出すための穴を複数個設けることが記載されているが、この穴は疎に配置されており、表層部を柔軟とする機能は有していない。
特開平９−２７１４２３特開２００４−２１５８１０ Japanese Patent Application Laid-Open No. 2004-215810 describes that a plurality of holes for blowing air for air-conditioning are provided on the seating surface of the pad, but these holes are arranged sparsely and the surface layer portion is made flexible. Does not have.
JP-A-9-271423 JP 2004-215810 A

上記特開平９−２７１４２３には、パッド本体の腿下部を深くえぐって凹所を形成し、この凹所にスラブフォームを嵌合する構成が示されているが、異種素材を用いるためコスト高となる。 JP-A-9-271423 discloses a structure in which a recess is formed by deeply indenting the lower thigh of the pad body, and a slab foam is fitted in this recess. Become.

表層部を柔軟とするために、座面に穴を設ける場合、この穴がパッドの座面と前面との角縁部付近にも位置していると、この角縁部は凸に湾曲しているところから、織布や皮革などよりなる表皮材を被着したときに、該表皮材に穴形状が浮き出てしまい、美観が損なわれる。 In order to make the surface layer portion flexible, when a hole is provided in the seating surface, if the hole is also located near the corner edge between the seating surface and the front surface of the pad, the corner edge is curved convexly. Therefore, when a skin material made of woven fabric or leather is applied, a hole shape appears on the skin material, and the aesthetic appearance is impaired.

本発明は、上記従来の問題点を解決し、座面及び前面がソフトであり、しかも表皮材を被着したときの美観が良好なシートパッドを提供することを目的とする。 An object of the present invention is to solve the above-mentioned conventional problems, and to provide a seat pad that has a soft bearing surface and front surface and that has a good appearance when a skin material is attached.

請求項１のシートパッドは、樹脂発泡体よりなり、乗員が着座する座面と、乗員の下脚部に対面する前面とを有するシートパッドにおいて、該シートパッドの前記前面となるべき面が略前後方向に延在した姿勢で該シートパッドの前記座面の前端側に連なった形状のシートパッド素体を製造し、その後、該前面となるべき面が縦面となるように該シートパッド素体の前部を下方に折り曲げ、この折り曲げ形状を保つことにより製造されたものであり、該シートパッド素体のうち、該前面となるべき面及び座面にそれぞれの表層部を柔軟とするための凹凸が設けられており、これらの間には、該凹凸が不存在の凹凸不存在領域が形成されており、該シートパッドを製造するに当たり、該シートパッド素体の前部を下方に折り曲げたときに、この凹凸不存在領域が該シートパッドの前記座面と前面とが交わる角縁部に配置されたことを特徴とするものである。 Seat pad according to claim 1 is made of resin foam, and the seat surface of the passenger is seated in a seat pad having a front surface facing the lower leg portion of the occupant, the front and made to face of the seat pad is substantially longitudinal Manufacturing a seat pad body having a shape extending in the direction and continuing to the front end side of the seating surface of the seat pad, and then the seat pad body so that the surface to be the front surface is a vertical surface The front part of the seat pad is bent downward and the bent shape is maintained, and the surface layer portion of the seat pad body is to be flexible on the surface and the seat surface to be the front surface. Concavities and convexities are provided, and an irregularity-free region where the irregularities are absent is formed between them, and the front portion of the seat pad body is bent downward in manufacturing the seat pad. When this It is characterized in that the convex absence region is located at the corner edge of said seat surface and the front of the seat pad intersects.

請求項２のシートパッドは、請求項１において、前記角縁部は曲率半径が１００ｍｍ以下の領域であることを特徴とし、請求項３のシートパッドは、請求項１または２において、前記凹凸として、開口面積が４０〜１０００ｍｍ ^２であり、深さが２〜２０ｍｍである凹穴が複数個設けられていることを特徴とするものである。 The seat pad according to claim 2 is characterized in that, in claim 1, the corner edge is a region having a radius of curvature of 100 mm or less, and the seat pad according to claim 3 is characterized in that the unevenness according to claim 1 or 2. As described above, a plurality of concave holes having an opening area of 40 to 1000 mm ² and a depth of ² to 20 mm are provided .

請求項４のシートパッドは、請求項１ないし３のいずれか１項において、前記座面の腿下部と前記前面とに前記凹凸が設けられていることを特徴とするものである。 According to a fourth aspect of the present invention, the seat pad according to any one of the first to third aspects is characterized in that the unevenness is provided on the lower thigh and the front surface of the seating surface .

請求項５のシートパッドは、請求項１ないし４のいずれか１項において、前記シートパッド素体の前記凹凸不存在領域の下面側に、前記クッション体の上面側に向かって凹陥した、該シートパッド素体の前部の折り曲げを容易化するための切欠状部が形成されていることを特徴とするものである。 The seat pad according to claim 5 , wherein the seat pad according to any one of claims 1 to 4 is recessed toward the upper surface side of the cushion body on a lower surface side of the unevenness nonexistent region of the seat pad body. A notch-like part for facilitating the bending of the front part of the pad body is formed .

請求項６の表皮材付きシートパッドは、請求項１ないし５のいずれか１項に記載のシートパッドに表皮材を被着してなるものである。 A seat pad with a skin material according to claim 6 is formed by attaching a skin material to the seat pad according to any one of claims 1 to 5 .

本発明のシートパッドは、前面及び座面の双方に凹凸を設けているので、乗員が当接したときにこの凹凸部分が圧縮変形し易い。そのため、乗員に感取される接触感がソフトなものとなる。 Seat pad of the present invention, since the irregularities on the bi towards the front and the seating surface, likely this uneven portion is compressed and deformed when the occupant is in contact. Therefore, the feeling of contact sensed by the occupant is soft.

本発明では、この座面と前面との角縁部において、凹凸が不存在の凹凸不存在領域が形成されている。そのため、乗員に感取される接触感がソフトなものとなる。
In the present invention, a concavo-convex absence region in which no concavo-convex exists is formed at the corner edge between the seat surface and the front surface . Therefore, the feeling of contact sensed by the occupant is soft.

なお、この角縁部以外の座面や前面は、略々平面状であるため、凹凸が存在していても表皮材に凹凸は浮き出ない。 Since the seating surface and the front surface other than the corner edge are substantially planar, the unevenness does not appear on the skin material even if the unevenness exists.

本発明のシートパッドは、低硬度の異種素材を乗員当接部に装着するものではなく、全体として一体発泡により製造することができる。 The seat pad of the present invention is not formed by attaching a low-hardness dissimilar material to the occupant contact portion, and can be manufactured by integral foaming as a whole.

請求項２の通り、曲率半径が１００ｍｍ以下の湾曲した角縁部を凹凸が存在しない領域とすることにより、表皮材に凹凸が浮き出ることが防止される。 According to the second aspect, by setting the curved corner portion having a radius of curvature of 100 mm or less as a region where there is no unevenness, the unevenness is prevented from being raised on the skin material.

請求項３のシートパッドでは、凹穴形成領域に乗員の身体が押し付けられたときに、凹穴同士間の部分が変形し、感触がソフトとなる。 In the seat pad according to the third aspect, when the occupant's body is pressed against the recessed hole forming region, the portion between the recessed holes is deformed, and the touch becomes soft.

請求項４の通り、腿下部及び前面に凹凸を設けることにより、着座したときの腿下部及び前面の感触がソフトとなる。 As described in claim 4, by providing irregularities on the lower thigh and the front surface, the feel of the lower thigh and the front surface when seated is soft.

以下、図面を参照して実施の形態について説明する。 Hereinafter, embodiments will be described with reference to the drawings.

第１図は実施の形態に係る車両用シートパッドの平面図、第２図は第１図のII−II線に沿う断面図、第３図はこの車両用シートパッドの素体の断面図、第４図は金型の断面図である。第５図は凹穴付近の平面図、第６図は第５図のVI−VI線に沿う断面図である。 1 is a plan view of a vehicle seat pad according to an embodiment, FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1, and FIG. 3 is a cross-sectional view of an element body of the vehicle seat pad. FIG. 4 is a sectional view of the mold. FIG. 5 is a plan view of the vicinity of the recessed hole, and FIG. 6 is a sectional view taken along line VI-VI in FIG.

この車両用シートパッド１は、ポリウレタンフォームよりなり、座面前部のドットで示した領域が腿下部２となる。腿下部２と前面３とが交わる部分が角縁部４となっている。このシートパッド１に織布、天然皮革、人工皮革などの表皮材（図示略）を被着することにより、シートパッド製品とされる。 The vehicle seat pad 1 is made of polyurethane foam, and a region indicated by a dot on the front portion of the seating surface is a lower thigh 2. A portion where the lower thigh 2 and the front surface 3 intersect with each other is a corner edge 4. By applying a skin material (not shown) such as woven fabric, natural leather, and artificial leather to the seat pad 1, a seat pad product is obtained.

車両用シートパッド１の上面には、表皮材を吊り込むための、前後方向の吊込溝５と横幅方向の吊込溝６とがＨ字形状を呈するように設けられている。 On the upper surface of the vehicle seat pad 1, a front-rear direction hanging groove 5 and a lateral width direction hanging groove 6 for hanging a skin material are provided in an H-shape.

この実施の形態では、このシートパッド１の腿下部２及び前面３（ドットを付した領域）に多数の凹穴７が設けられている。この実施の形態では、円形の凹穴７を各円の中心が正三角形の各頂点に位置するように配列し、凹穴７同士の間を凸条９としている。この凹穴７を多数設けたことにより、腿下部２及び前面３が圧縮変形し易いものとなっている。このため、乗員が着座して大腿が腿下部２に押し付けられたり、乗員の下脚部が前面３に当ったときの感触がソフトとなる。 In this embodiment, a large number of concave holes 7 are provided in the lower thigh 2 and front surface 3 (regions with dots) of the seat pad 1. In this embodiment, the circular concave holes 7 are arranged so that the centers of the respective circles are located at the vertices of the regular triangle, and the ridges 9 are formed between the concave holes 7. By providing a large number of the recessed holes 7, the lower thigh 2 and the front surface 3 are easily compressed and deformed. For this reason, the feeling when the occupant is seated and the thigh is pressed against the lower thigh 2 or the lower leg portion of the occupant hits the front surface 3 is soft.

この実施の形態では、座面と前面とが交わる角縁部４には凹穴７を設けていない。そのため、このパッドに表皮材を被着したときに表皮材に凹穴が浮き出ない。 In this embodiment, the concave hole 7 is not provided in the corner edge portion 4 where the seat surface and the front surface intersect. For this reason, when the skin material is applied to the pad, no concave hole is raised in the skin material.

なお、曲率半径が１００ｍｍ以下、特に８０ｍｍ以下、例えば４０〜６０ｍｍの角縁部４は凸曲の度合いが強いので、この角縁部領域に凹穴７を設けないことにより、表皮材に凹穴が浮き出ることが防止される。 Note that the corner edge 4 having a radius of curvature of 100 mm or less, particularly 80 mm or less, for example, 40 to 60 mm, has a strong degree of convex curvature. Therefore, by not providing the concave hole 7 in this corner edge region, Is prevented from coming out.

シートパッドの前面３とは、この角縁部４よりも下位の縦面をいうものとする。 The front surface 3 of the seat pad is a lower vertical surface than the corner edge 4.

凹穴７を設ける腿下部２の領域後縁とシートパッド前端との距離Ｓは１５０〜３５０ｍｍ特に２００〜２５０ｍｍ程度が好ましい。 The distance S between the region rear edge of the lower thigh 2 where the concave hole 7 is provided and the seat pad front end is preferably about 150 to 350 mm, particularly about 200 to 250 mm.

凸条９の頂面は、凹穴７及び凸条９を設けた領域の周囲のシートパッド表面と面一状に連続している。 The top surface of the ridge 9 is continuous with the seat pad surface around the area where the concave holes 7 and the ridges 9 are provided.

凹穴７の直径Ｗは１０〜４０ｍｍ特に１５〜３０ｍｍ程度が好ましい。凹穴７の深さｈは２〜４０ｍｍ特に５〜２０ｍｍとりわけ１０〜１５ｍｍ程度が好ましい。隣り合う凹穴７同士の間の最も小さい凸条９の厚さｔは２〜２０ｍｍ特に４〜１０ｍｍが好ましい。 The diameter W of the recessed hole 7 is preferably about 10 to 40 mm, particularly about 15 to 30 mm. The depth h of the concave hole 7 is preferably 2 to 40 mm, particularly 5 to 20 mm, especially 10 to 15 mm. The thickness t of the smallest ridge 9 between adjacent concave holes 7 is preferably 2 to 20 mm, particularly 4 to 10 mm.

なお、この実施の形態では、凹穴７の直径は深さ方向において均一であるが、凹穴７の直径が例えば第７図の如く深さ方向において変化する場合、直径や凸条の厚さｔは、いずれも深さ方向の中間部での直径、厚さを示すものとする。 In this embodiment, the diameter of the concave hole 7 is uniform in the depth direction. However, when the diameter of the concave hole 7 changes in the depth direction as shown in FIG. t represents the diameter and thickness at the intermediate portion in the depth direction.

凸条９の体積率は１０〜８０％特に４０〜６０％が好ましい。この凸条の体積率とは、凸条９及び凹穴７を設けた領域の面積（第１図のドットを付した領域）に凹穴７の深さｈを乗じて得た体積に対して凸条９の体積が占める比率をいう。この体積率を１０〜８０％とすることにより、表層部のソフト感が良好となる。また、４０〜６０％とすることにより、ソフト感が良好になると共に凸条の耐久性が良好となる。 The volume ratio of the ridges 9 is preferably 10 to 80%, particularly 40 to 60%. The volume ratio of the ridges is based on the volume obtained by multiplying the area of the region provided with the ridges 9 and the concave holes 7 (the region with dots in FIG. 1) by the depth h of the concave holes 7. The ratio which the volume of the protruding item | line 9 occupies says. By setting the volume ratio to 10 to 80%, the soft feeling of the surface layer portion is improved. Moreover, by setting it as 40 to 60%, while a soft feeling becomes favorable, durability of a protruding item | line becomes favorable.

なお、座面のサイド部側ほど凹穴の配置数を減少させ、ソフト感を少なくしてもよい。 In addition, the number of concave holes may be decreased toward the side portion side of the seating surface to reduce the soft feeling.

この実施の形態では、凸条９の頂面が平坦であるので、乗員の大腿部や下脚部が触れたときに、凹穴７や凸条９が人体に感取されにくく、触感が良い。また、凸条９が基端から先端までほぼ均一断面形状であると、圧縮変形時の応力歪曲線の勾配がなだらかとなり、当接感が良好である。 In this embodiment, since the top surface of the ridge 9 is flat, when the occupant's thigh or lower leg is touched, the concave hole 7 and the ridge 9 are not easily sensed by the human body, and the tactile sensation is good. . Further, if the ridge 9 has a substantially uniform cross-sectional shape from the base end to the tip end, the gradient of the stress strain curve during compression deformation becomes gentle, and the feeling of contact is good.

この実施の形態では、第５図のように凸条が３方向に延在しているので、凸条が２方向に延在しているものに比べ、身体が当接したときの異方性が小さい。 In this embodiment, since the ridges extend in three directions as shown in FIG. 5, the anisotropy when the body abuts compared to those in which the ridges extend in two directions. Is small.

このシートパッド１は、第４図に示す金型３０を用いて第３図に示すシートパッド素体１Ａを製造し、このシートパッド素体１Ａの前部を矢印Ａ方向に折り曲げることにより製造されたものである。 The seat pad 1 is manufactured by manufacturing the seat pad body 1A shown in FIG. 3 using the mold 30 shown in FIG. 4, and bending the front portion of the seat pad body 1A in the direction of arrow A. It is a thing.

この金型３０は、下型３１と上型３２とを有しており、下型３１のキャビティの底面に凹穴７を形成するための凸部３３，３４が設けられている。凸部３３は前面の凹穴７を形成するためのものであり、凸部３４は腿下部２の凹穴７を形成するためのものである。 The mold 30 includes a lower mold 31 and an upper mold 32, and convex portions 33 and 34 for forming the concave holes 7 are provided on the bottom surface of the cavity of the lower mold 31. The convex part 33 is for forming the concave hole 7 on the front surface, and the convex part 34 is for forming the concave hole 7 on the thigh lower part 2.

この凸部３３，３４は、キャビティ底面から単純に上方へ突設されたものであるため、脱型時にシートパッド素体１Ａの凹穴７部分が凸部３３，３４に引っ掛ることがなく、スムーズに脱型することができ、凹穴７部分が損傷することもない。なお、金型３０内のシートパッド素体１Ａは、製品シートパッド１とは上下逆となっている。 Since the convex portions 33 and 34 are simply protruded upward from the bottom surface of the cavity, the concave hole 7 portion of the seat pad body 1A is not caught by the convex portions 33 and 34 at the time of demolding. The mold can be removed smoothly, and the concave hole 7 portion is not damaged. The seat pad body 1A in the mold 30 is upside down with respect to the product seat pad 1.

凸部３３，３４は下型３１と一連一体に設けられたものであってもよく、下型とは別体の凸形状部材を下型３１に着脱可能に取り付けたものであってもよい。 The protrusions 33 and 34 may be provided integrally with the lower mold 31, or may be a structure in which a convex member separate from the lower mold is detachably attached to the lower mold 31.

脱型して得たシートパッド素体１Ａの下面には、前部を折り曲げ易くするための切欠状部８が形成されている。この切欠状部８に沿ってシートパッド素体１Ａの前部を矢印Ａ方向に折り曲げる。必要に応じ、切欠状部８に接着剤を塗布するか両面テープを貼っておき、折り曲げ合わせ面を接合することにより、折り曲げ形状を保つようにする。 On the lower surface of the seat pad body 1A obtained by demolding, a notch-shaped portion 8 is formed to facilitate folding the front portion. A front portion of the seat pad body 1 </ b> A is bent in the direction of arrow A along the notch 8. If necessary, an adhesive is applied to the notch-shaped portion 8 or a double-sided tape is applied, and the bent joining surfaces are joined to maintain the bent shape.

シートパッド１の構成材料としては、コア密度３５〜１００ｋｇ／ｍ^３特に４０〜８０ｋｇ／ｍ^３、２５％ＩＬＤ硬度１５〜４５ｋｇｆ／φ２００ｍｍ程度のポリウレタンフォームが望ましい。 Examples of the material of the seat pad 1, core density 35~100kg / ^{m 3,} especially 40 to 80 kg ^/ m 3, is desired 25% ILD hardness 15~45kgf / φ200mm about polyurethane foam.

［別形状の凸条及び凹穴の説明］
第１〜６図の実施の形態において、凸条９はシートパッド素体１Ａの表面と垂直な断面が角形であり、凸条９は基端（下端）から先端（上端）に至るまで幅ｔが均一となっているが、上方ほど幅ｔが小さくなる台形、半角形、半楕円形又はＵ字形断面形状であってもよい。また、第７図のように凸条９の基端側や上端側の角縁にＲ付けしてもよい。このＲ付けの曲率半径は１〜１０ｍｍ程度（深さｈの半分の長さの径）が好適である。基端側角縁とは凸条９の側面と凹穴７の底面との隅角であり、上端側角縁とは、凸条９の側面と上面との交差角縁である。 [Explanation of ridges and grooves with different shapes]
In the embodiment shown in FIGS. 1 to 6, the ridge 9 has a square cross section perpendicular to the surface of the seat pad body 1A, and the ridge 9 has a width t from the base end (lower end) to the tip end (upper end). However, it may be trapezoidal, half-square, semi-elliptical, or U-shaped cross-sectional shape in which the width t decreases toward the top. In addition, as shown in FIG. 7, R may be attached to the corner edge of the ridge 9 on the base end side or the upper end side. The radius of curvature of the R is preferably about 1 to 10 mm (diameter half the depth h). The base end side corner edge is a corner angle between the side surface of the ridge 9 and the bottom surface of the concave hole 7, and the upper end side corner edge is an intersection angle edge between the side surface of the ridge 9 and the top surface.

第１〜６図では、凹穴７の平面視形状は円形となっているが、凹穴は、三角形又は正方形であってもよく、長穴例えば長方形、楕円形又は細長い溝形等であってもよく、六角形、八角形等の多角形であってもよい。 1 to 6, the shape of the concave hole 7 in a plan view is circular, but the concave hole may be a triangle or a square, and is a long hole such as a rectangle, an ellipse, or an elongated groove. Alternatively, it may be a polygon such as a hexagon or an octagon.

第８図は正六角形の凹穴１０をハニカム形に配列することにより前面及び腿下部をソフト化したものであり、凹穴１０同士の間が凸条１１となっている。 FIG. 8 shows an arrangement in which regular hexagonal concave holes 10 are arranged in a honeycomb shape to soften the front surface and the thigh lower part, and convex grooves 11 are formed between the concave holes 10.

凸条１１の厚さｔは２〜２０ｍｍ特に４〜１０ｍｍ、凹穴１０の対角線長さＬは１０〜４０ｍｍ特に１５〜３０ｍｍが好ましい。１個の凹穴１０の開口面積や凸条１１の高さ（凹穴１０の深さ）、凸条１１の頂面の面積割合の好適な範囲、シートパッドの好適な材料などは第１図〜第６図の実施の形態と同様である。 The thickness t of the ridge 11 is preferably 2 to 20 mm, particularly 4 to 10 mm, and the diagonal length L of the concave hole 10 is preferably 10 to 40 mm, particularly preferably 15 to 30 mm. The opening area of one concave hole 10, the height of the ridge 11 (depth of the concave hole 10), the preferred range of the area ratio of the top surface of the ridge 11, the preferred material of the seat pad, etc. are shown in FIG. ~ Same as the embodiment of FIG.

第８図では凹穴は正六角形であるが、正六角形以外の六角形であってもよい。ただし、対向する辺が平行な六角形が好ましく、正六角形が最も好ましい。 In FIG. 8, the concave hole is a regular hexagon, but it may be a hexagon other than a regular hexagon. However, a hexagon whose opposite sides are parallel is preferable, and a regular hexagon is most preferable.

第９図は方形の凹穴１２を枡目状に配列し、凹穴１２同士の間を凸条１３としたものである。凹穴１２の深さは２〜４０ｍｍ特に５〜２０ｍｍとりわけ１０〜１５ｍｍ、凸条１３の幅（厚さ）は２〜２０ｍｍ特に４〜１０ｍｍ、凹穴１２の一辺の長さは１０〜３０ｍｍ特に２０〜３０ｍｍ、１個の凹穴１２の開口面積は５０〜１０００ｍｍ^２特に１００〜９００ｍｍ^２とりわけ４００〜７００ｍｍ^２であることが好ましい。凸条１３の体積率の好適な範囲、シートパッドの好適な材料などは第１図〜第６図の実施の形態と同様である。 FIG. 9 shows a case in which rectangular concave holes 12 are arranged in a grid pattern, and convex ridges 13 are formed between the concave holes 12. The depth of the recessed hole 12 is 2 to 40 mm, particularly 5 to 20 mm, especially 10 to 15 mm, the width (thickness) of the ridge 13 is 2 to 20 mm, particularly 4 to 10 mm, and the length of one side of the recessed hole 12 is particularly 10 to 30 mm. The opening area of 20 to 30 mm and one recessed hole 12 is preferably 50 to 1000 mm ^2, particularly 100 to 900 mm ^2, particularly 400 to 700 mm ² . The preferred range of the volume ratio of the ridges 13, the preferred material of the seat pad, and the like are the same as in the embodiment of FIGS.

なお、本発明では、座面のさらに他の部位にも凹穴を設けてもよい。例えば、骨盤接触部を平坦とし、骨盤をしっかりと支持するようにし、その他の座面については上記のように凹穴を設け、ソフト感に富むものとしてもよい。 In the present invention, a recessed hole may be provided in another part of the seating surface. For example, the pelvis contact portion may be made flat to support the pelvis firmly, and the other seating surface may be provided with a concave hole as described above so as to have a rich soft feeling.

［シートパッド表面に溝を設けることによって表層部をソフト化した実施の形態］
上記実施の形態では凹穴を設けることによりシートパッドの前面及び腿下部の表層部をソフト化しているが、溝を設けて凸部を設けることによりシートパッド表層部をソフト化してもよい。 [Embodiment in which the surface layer is softened by providing grooves on the surface of the seat pad]
In the above-described embodiment, the surface layer portion of the front surface of the seat pad and the lower thigh is softened by providing the concave hole, but the seat pad surface layer portion may be softened by providing the groove and providing the convex portion.

第１０図はかかる実施の形態に係るシートパッド前面の斜視図、第１１図は第１０図のXI−XI線断面図である。 FIG. 10 is a perspective view of the front surface of the seat pad according to this embodiment, and FIG. 11 is a sectional view taken along line XI-XI in FIG.

第１０，１１図では、シートパッド前面に、直交方向に延在する溝１８を設けることにより、多数の凸部１９が設けられている。溝１８はシートパッド前面と垂直な断面が角形の角形溝であり、凸部１９は基端（下端）から先端（上端）に至るまで断面形状が均一な正方形となっている。ただし、凸部１９の断面形状は、先端ほど幅が小さくなる形状であってもよい。 In FIGS. 10 and 11, a large number of convex portions 19 are provided by providing grooves 18 extending in the orthogonal direction on the front surface of the seat pad. The groove 18 is a square groove having a square cross section perpendicular to the front surface of the seat pad, and the convex portion 19 is a square having a uniform cross section from the base end (lower end) to the tip end (upper end). However, the cross-sectional shape of the convex portion 19 may be such that the width becomes smaller toward the tip.

凸部１９の平均の高さ即ち溝１８の平均の深さｄは５〜２０ｍｍ特に１０〜１５ｍｍ、溝１８の平均の幅ｅは５〜２０ｍｍ特に１０〜１５ｍｍ、凸部１９の頂面の一辺の寸法ｆは５〜２０ｍｍ特に１０〜１５ｍｍ、頂面の面積は２５〜４００ｍｍ^２特に１００〜２２５ｍｍ^２であることが好ましい。 The average height of the protrusions 19, that is, the average depth d of the grooves 18 is 5 to 20 mm, particularly 10 to 15 mm, the average width e of the grooves 18 is 5 to 20 mm, particularly 10 to 15 mm, and one side of the top surface of the protrusions 19 It is preferable that the dimension f is 5 to 20 mm, particularly 10 to 15 mm, and the top surface area is 25 to 400 mm ^2, particularly 100 to 225 mm ² .

この凸部１９の体積率も１０〜８０％特に４０〜６０％程度が好ましい。 The volume ratio of the convex portion 19 is also preferably about 10 to 80%, particularly about 40 to 60%.

なお、凸部の平面視形状は方形に限定されるものではなく、三角形、多角形、円形、楕円形など各種形状としうる。 In addition, the planar view shape of a convex part is not limited to a square, It can be set as various shapes, such as a triangle, a polygon, a circle, and an ellipse.

凸部１９を形成するには、凸部形成用の凹部を設けた金型を用いて成形してもよいが、厚み方向に多数の孔が貫通した板状体を下型のキャビティ面に配置しておくのが好ましい。 In order to form the convex portion 19, it may be molded using a mold provided with a concave portion for forming the convex portion. However, a plate-like body having a large number of holes penetrating in the thickness direction is arranged on the cavity surface of the lower die. It is preferable to keep it.

以下、実施例及び比較例について説明する。便宜上まず、比較例１について説明する。 Hereinafter, examples and comparative examples will be described. For convenience, Comparative Example 1 will be described first.

比較例１
密度６４ｋｇ／ｍ^３、２５％硬度２４ｋｇｆ／２００ｍｍφのポリウレタンフォームよりなるシートパッドを製作した。前面には凹凸は設けていない。このシートパッド前面の荷重−ストローク曲線を求めた。なお、この測定には、直径２００ｍｍの負荷子を用い、この負荷子を速度０．８ｍｍ／ｓｅｃで座面に押し付け、反力を計測した。結果を第１２図に示す。なお、凹穴及び凸条は存在しないので、凸条の体積率は１００％である。 Comparative Example 1
A sheet pad made of polyurethane foam having a density of 64 kg / m ³ and a 25% hardness of 24 kgf / 200 mmφ was manufactured. There are no irregularities on the front. A load-stroke curve on the front surface of the seat pad was determined. In this measurement, a loader having a diameter of 200 mm was used, and this loader was pressed against the seat surface at a speed of 0.8 mm / sec, and the reaction force was measured. The results are shown in FIG. In addition, since a concave hole and a protruding item | line do not exist, the volume ratio of a protruding item | line is 100%.

実施例１
第４図に示すように成形用金型の下型キャビティ面に凸部を設けることにより、比較例１と同一のウレタン原液を用い、第５図に示す円形の凹穴を設けることによりシートパッドの腿下部及び前面をソフト化したシートパッドを製造した。凹穴及び凸条を設けた領域の大きさは、腿下部において３５０×２５０ｍｍであり、前面において３５０×１００ｍｍである。凹穴７の直径を１２ｍｍ、深さを５ｍｍ、隣接する凹穴７の中心間の距離を１９ｍｍとした。凸条９の体積率は７０％である。このシートパッドの腿下部に、上記比較例１と同様に負荷子を押し当てて、荷重−ストローク曲線を求めた。結果を第１２図に示す。 Example 1
As shown in FIG. 4, a sheet pad is formed by providing a convex portion on the lower cavity surface of the molding die, using the same urethane stock solution as in Comparative Example 1, and providing a circular concave hole shown in FIG. A seat pad with softened lower and front thighs was manufactured. The size of the region provided with the concave holes and the ridges is 350 × 250 mm at the lower thigh and 350 × 100 mm at the front surface. The diameter of the concave hole 7 was 12 mm, the depth was 5 mm, and the distance between the centers of the adjacent concave holes 7 was 19 mm. The volume ratio of the ridges 9 is 70%. A loader was pressed against the lower thigh of the seat pad in the same manner as in Comparative Example 1 to obtain a load-stroke curve. The results are shown in FIG.

実施例２
凹穴７の直径を１９ｍｍ、深さを５ｍｍ、隣接する凹穴７の中心間の距離を２６ｍｍとし、凸条９の体積率を５０％とした他は実施例１と同様にしてシートパッドを製造した。 Example 2
The seat pad was formed in the same manner as in Example 1 except that the diameter of the concave hole 7 was 19 mm, the depth was 5 mm, the distance between the centers of the adjacent concave holes 7 was 26 mm, and the volume ratio of the ridges 9 was 50%. Manufactured.

実施例３
凹穴７の直径を２４ｍｍ、深さを５ｍｍ、隣接する凹穴７の中心間の距離を３０ｍｍとし、凸条９の体積率を４０％とした他は実施例１と同様にしてシートパッドを製造した。 Example 3
The seat pad was formed in the same manner as in Example 1 except that the diameter of the concave hole 7 was 24 mm, the depth was 5 mm, the distance between the centers of the adjacent concave holes 7 was 30 mm, and the volume ratio of the ridges 9 was 40%. Manufactured.

実施例４
凹穴７の直径を２８ｍｍ、深さを５ｍｍ、隣接する凹穴７の中心間の距離を３２ｍｍとし、凸条９の体積率を２５％とした他は実施例１と同様にしてシートパッドを製造した。 Example 4
The seat pad was formed in the same manner as in Example 1 except that the diameter of the concave hole 7 was 28 mm, the depth was 5 mm, the distance between the centers of the adjacent concave holes 7 was 32 mm, and the volume ratio of the ridges 9 was 25%. Manufactured.

これらの実施例２〜４のシートパッドの腿下部に、上記比較例１と同様に負荷子を押し当てて、荷重−ストローク曲線を求めた。結果を第１２図に示す。 A loader was pressed against the lower thighs of the seat pads of Examples 2 to 4 in the same manner as in Comparative Example 1 to obtain a load-stroke curve. The results are shown in FIG.

［考察］
第１２図の通り、実施例１〜４のシートパッドの前面は、比較例１に比べてソフトである。また、凸条の体積率が小さくなるほどソフトになることも認められる。 [Discussion]
As shown in FIG. 12, the front surfaces of the seat pads of Examples 1 to 4 are softer than those of Comparative Example 1. It is also recognized that the smaller the volume ratio of the ridges, the softer.

各シートパッドの腿下部について５０℃、湿度９５％の恒温恒湿槽内で２２時間５０％圧縮後の残留歪を測定し、残留歪と凸条の体積率との関係を第１３図に示した。
また、実施例２のシートパッドにおいて、凸条の基端側及び先端側の角縁にＲ＝３．５ｍｍのＲ付けを施したものについて、同様に残留歪を測定したところ、圧縮残留歪は１９．８％から１８．８％に低下することが認められた。 Fig. 13 shows the relationship between the residual strain and the volume ratio of the ridges at the lower thigh of each seat pad after measuring the remaining strain after 50% compression for 22 hours in a constant temperature and humidity chamber at 50 ° C and 95% humidity. It was.
Further, in the seat pad of Example 2, the residual strain was measured in the same manner as for the case where R was applied to the corner edge of the base end side and the tip end side of the ridge, and the compression residual strain was A reduction from 19.8% to 18.8% was observed.

実施の形態に係る車両用シートパッドの平面図である。It is a top view of the vehicular seat pad concerning an embodiment. 第１図のII−II線に沿う断面図である。It is sectional drawing which follows the II-II line of FIG. シートパッド素体の断面図である。It is sectional drawing of a seat pad element | base_body. シートパッド成形用金型の断面図である。It is sectional drawing of the metal mold | die for seat pad shaping | molding. 凹穴の平面図である。It is a top view of a concave hole. 第５図のVI−VI線に沿う断面図である。It is sectional drawing which follows the VI-VI line of FIG. 凹穴及び凸条の別形状を示す断面図である。It is sectional drawing which shows another shape of a recessed hole and a protruding item | line. 凹穴及び凸条の別形状を示す平面図である。It is a top view which shows another shape of a recessed hole and a protruding item | line. 凹穴及び凸条の別形状を示す斜視図である。It is a perspective view which shows another shape of a recessed hole and a protruding item | line. 別の実施の形態を示す斜視図である。It is a perspective view which shows another embodiment. 図１０のXI−XI線断面図である。It is the XI-XI sectional view taken on the line of FIG. 実施例及び比較例のシートパッドの荷重−ストローク曲線を示すグラフである。It is a graph which shows the load-stroke curve of the seat pad of an Example and a comparative example. 実施例及び比較例のシートパッドの残留歪と凸条の体積率との関係を示すグラフである。It is a graph which shows the relationship between the residual distortion of the seat pad of an Example and a comparative example, and the volume ratio of a protruding item | line.

Explanation of symbols

１車両用シートパッド
１Ａシートパッド素体
２腿下部
３前面
４角縁部
７，１０，１２凹穴
８切欠状部
９，１１，１３凸条
３０金型
３３，３４凸部 DESCRIPTION OF SYMBOLS 1 Vehicle seat pad 1A Seat pad base body 2 Thigh lower part 3 Front face 4 Corner edge part 7, 10, 12 Recessed hole 8 Notch-shaped part 9, 11, 13 Convex strip 30 Mold 33, 34 Convex part

Claims

Made of resin foam,
In a seat pad having a seat surface on which an occupant is seated and a front surface facing the lower leg of the occupant,
A seat pad body having a shape connected to the front end side of the seating surface of the seat pad is manufactured in a posture in which a surface to be the front surface of the seat pad extends substantially in the front-rear direction, and then the front surface of the seat pad should be the front surface. It is manufactured by bending the front part of the seat pad body downward so that the surface becomes a vertical surface, and maintaining this bent shape,
In the seat pad body, the surface to be the front surface and the seating surface are provided with unevenness to make each surface layer portion flexible, and there is no unevenness between the unevenness. When the front portion of the seat pad body is bent downward in manufacturing the seat pad, the region where the unevenness does not exist is an angle at which the seat surface and the front surface of the seat pad intersect. A seat pad arranged at an edge .

2. The seat pad according to claim 1, wherein the corner edge is a region having a radius of curvature of 100 mm or less.

3. The seat pad according to claim 1, wherein the concave and convex portions are provided with a plurality of concave holes having an opening area of 40 to 1000 mm ² and a depth of ² to 20 mm.

4. The seat pad according to claim 1, wherein the unevenness is provided on a lower thigh of the seating surface and the front surface. 5.

The bending of the front part of the seat pad body according to any one of claims 1 to 4 , wherein the seat pad body is recessed toward the upper surface side of the cushion body on the lower surface side of the unevenness non-existing region of the seat pad body. A seat pad having a notch for facilitating the process.

A seat pad with a skin material, which is obtained by attaching a skin material to the seat pad according to any one of claims 1 to 5 .