JP2017200810A

JP2017200810A - Vehicular cushion pad and manufacturing method therefor

Info

Publication number: JP2017200810A
Application number: JP2016093497A
Authority: JP
Inventors: 松本　真人; Masato Matsumoto; 真人松本
Original assignee: Inoue MTP KK; Inoac Corp
Current assignee: Inoac Corp
Priority date: 2016-05-06
Filing date: 2016-05-06
Publication date: 2017-11-09
Anticipated expiration: 2036-05-06
Also published as: JP6643947B2

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular cushion pad capable of blowing air by providing an air distribution flow passage in the pad.SOLUTION: The vehicular cushion pad includes an air distribution flow passage. The vehicular cushion pad includes: a core pad 2 which is constituted of a nonpermeable foam and is provided with a recess 21 for the air distribution flow passage on a rear face side and a plurality of through-holes 23 penetrating from the recess bottom of the recess 21 to a front face side; an upper layer pad 4 which is constituted of a soft polyurethane foam, is provided with a seat surface portion 41 on a design surface 4a side, has an internal surface 4b side opposite to the design surface 4a side, which is jointed to the surfaces of the core pads 2, is further provided with a plurality of air blowout holes 45 penetrating from the internal surface 4b side to the design surface 4a side, and has the respective air blowout holes 45 arranged to be electrically connected to the through-holes; and a lower layer pad 6 which is constituted of a nonpermeable foam, has a top face 6a side which covers the opening of the recess 21 so as to form the air distribution flow passage u and is joined to rear faces of the core pads 2, and is further provided with an air introduction hole 61 penetrating from a lower face 6b side to the inside of the air distribution flow passage u.SELECTED DRAWING: Figure 4

Description

本発明は、車両用座席シートの座部を構成する車両用クッションパッド及びその製造方法に関する。 The present invention relates to a vehicle cushion pad constituting a seat portion of a vehicle seat and a method for manufacturing the same.

自動車等の車両に搭載される座席シートの座部を構成するシートクッションは乗員が座って直かに接する部分であり、暑い季節になると乗員はその箇所が汗ばむ一方、冬の季節を向かえると冷たく感じることがある。こうしたことから、本出願人は、温度調整された空気を送ることのできる配風用ダクトをインサートし、少なくとも乗員が当接する座面部分を軟質ポリウレタン発泡体で一体成形したダクト入りシートクッションを提案した（特開２０１１−１１０３６６号公報等）。
一方、近年の普及車向け車両用クッションパッド等では、軽量化を推し進めたり高コストのウレタン使用量を少なくしたりする動きがあり、これに応える発明が提案されている（例えば特許文献１）。 The seat cushion that constitutes the seat of a seat seat mounted on a vehicle such as an automobile is a part where the occupant sits and touches directly, and the occupant sweats in the hot season, but cools when the winter season is approached I may feel it. For this reason, the present applicant has proposed a seat cushion with a duct in which a duct for air distribution capable of sending temperature-adjusted air is inserted, and at least a seat surface portion on which an occupant abuts is integrally formed with a soft polyurethane foam. (Japanese Patent Laid-Open No. 2011-110366, etc.).
On the other hand, in recent years, cushion pads for vehicles for popular vehicles have been moved to reduce weight and reduce the amount of high-cost urethane used, and an invention that responds to this has been proposed (for example, Patent Document 1).

特開平９−７０３３０号公報JP-A-9-70330

しかるに、特許文献１の請求項１は「上下二層の発泡体層からなる車両用シートの層状異硬度パッドであって、上層がポリウレタン発泡体で形成されるとともに、下層がポリスチロール発泡体で形成されており、上・下層が一体に接合されていることを特徴とする車両用シートの層状異硬度パッド。」であり、配風用ダクトを埋設一体化させるのは困難であった。層状異硬度パッド（本発明でいう「クッションパッド」）で、配風流路を設けて温度調整された空気の送風が求められる場合もあり、そうしたケースでは対応しづらい問題がある。 However, claim 1 of Patent Document 1 is “a layered hetero-hardness pad for a vehicle seat comprising two upper and lower foam layers, wherein the upper layer is formed of polyurethane foam and the lower layer is made of polystyrene foam. It is formed, and the upper and lower layers are integrally joined to each other in a layered different hardness pad of a vehicle seat. ”It was difficult to embed and integrate the air distribution duct. There is a case where a layered different hardness pad ("cushion pad" in the present invention) is required to blow air whose temperature is adjusted by providing an air distribution channel. In such a case, there is a problem that it is difficult to deal with.

本発明は、上記問題を解決するもので、パッド内部に配風流路を設けて温度調整された空気の送風を可能にし、且つ軽量化やウレタン使用量の削減を実現する車両用クッションパッド及びその製造方法を提供することを目的とする。 The present invention solves the above-described problem, and provides a vehicle cushion pad that allows air to be blown at a temperature adjusted by providing an air distribution channel inside the pad, and that achieves weight reduction and a reduction in the amount of urethane used. An object is to provide a manufacturing method.

上記目的を達成すべく、請求項１に記載の発明の要旨は、少なくとも乗員が当接する座面部分を軟質ポリウレタン発泡体で構成して、配風流路を備えた車両用クッションパッドであって、非通気性発泡体で構成され、裏面側に配風流路用凹みが設けられ、且つ該凹みの凹底から表面側へ貫通する透孔が複数設けられた芯パッドと、軟質ポリウレタン発泡体で構成され、意匠面側に前記座面部分が設けられ、前記意匠面側と反対の内面側は前記芯パッドの表面に接合し、さらに該内面側から前記意匠面側へ貫通するエア吹出孔が複数設けられ、且つ該エア吹出孔が前記透孔に夫々導通するように配された上層パッドと、非通気性発泡体で構成され、上面側が、配風流路を形成するように前記凹みの開口を覆って、前記芯パッドの裏面に接合し、さらに下面側から該配風流路内へ貫通するエア導入孔が設けられた下層パッドと、を具備し、且つ前記軟質ポリウレタン発泡体の見掛け密度よりも前記非通気性発泡体の見掛け密度が小であることを特徴とする車両用クッションパッドにある。請求項２の発明たる車両用クッションパッドは、請求項１で、芯パッド及び前記下層パッドの非通気性発泡体が発泡ポリプロピレン又は発泡スチロールの成形体であることを特徴とする。請求項３の発明たる車両用クッションパッドは、請求項１又は２で、芯パッドの裏面側に、前記凹みの側壁を担ってその凹底よりも裏面側へ***して、前記凹みを仕切る延在部分が半島状に延出形成され、且つ該延在部分の裏面が平坦面に形成されたことを特徴とする。請求項４の発明たる車両用クッションパッドは、請求項３で、凹みを囲む周縁部の裏面が、前記芯パッドの裏面から段差状に凹ませた段差面に形成され、且つ該段差面と前記延在部分の裏面とが一様の平坦面に形成されたことを特徴とする。
請求項５に記載の発明の要旨は、少なくとも乗員が当接する座面部分を軟質ポリウレタン発泡体で構成して、配風流路を備えた車両用クッションパッドの製造方法であって、見掛け密度が前記軟質ポリウレタン発泡体よりも小の非通気性発泡体で構成され、裏面側に配風流路用凹みを設けて、且つ該凹みの凹底から表面側へ貫通する透孔を複数設けてなる芯パッドに係る該透孔に、発泡型の上型型面から突出する複数のピンを夫々挿通し且つ上型型面に前記芯パッドの裏面側を当接させて、該芯パッドを上型型面にセットし、次に、下型型面上に軟質ポリウレタン発泡体用原料を注入し、次いで、前記座面部分を形成する下型型面側に、前記ピンの先端を当接させて型閉じし、続いて、意匠面側に座面部分を設けて、内面側を前記芯パッドの表面に接合させた軟質ポリウレタン発泡体の上層パッドを発泡成形し、その後、脱型し、しかる後、見掛け密度が前記軟質ポリウレタン発泡体よりも小の非通気性発泡体で構成され、下面側から上面側へエア導入孔を貫通させた下層パッドの上面側で配風流路を形成するように前記凹みの開口を覆い、且つ該エア導入孔を該配風流路内へ導通させて、前記芯パッドの裏面に該下層パッドを接合させたことを特徴とする車両用クッションパッドの製造方法にある。請求項６の発明たる車両用クッションパッドの製造法は、請求項５で、芯パッド及び前記下層パッドの非通気性発泡体が発泡ポリプロピレン又は発泡スチロールの成形体であることを特徴とする。請求項７の発明たる車両用クッションパッドの製造法は、請求項５又は６で、芯パッドの裏面側に、前記凹みの側壁を担ってその凹底よりも裏面側へ***させて、前記凹みを仕切る延在部分を半島状に延出形成し、且つ該延在部分の裏面が平坦面に形成され、さらに前記凹みを囲む周縁部の裏面が、前記芯パッドの裏面から段差状に凹ませた段差面に形成され、且つ該段差面と前記延在部分の裏面とが一様の平坦面に形成されたことを特徴とする。 In order to achieve the above-mentioned object, the gist of the invention described in claim 1 is a vehicle cushion pad comprising at least a seat surface part with which a passenger abuts made of a soft polyurethane foam and provided with an air distribution channel, Consists of a non-breathable foam, a core pad provided with a recess for the air distribution channel on the back side and a plurality of through holes penetrating from the bottom of the recess to the front side, and a soft polyurethane foam The seat surface portion is provided on the design surface side, the inner surface side opposite to the design surface side is joined to the surface of the core pad, and there are a plurality of air blowing holes penetrating from the inner surface side to the design surface side. An upper layer pad that is provided so that the air blowing hole is electrically connected to the through hole and a non-breathable foam, and the upper surface side has the opening of the recess so as to form an air distribution channel. Cover and bond to the back of the core pad, And a lower layer pad provided with an air introduction hole penetrating from the lower surface side into the air distribution channel, and the apparent density of the non-breathable foam is smaller than the apparent density of the soft polyurethane foam. It is in the cushion pad for vehicles characterized by being. A vehicle cushion pad according to a second aspect of the present invention is the vehicle cushion pad according to the first aspect, wherein the non-breathable foam of the core pad and the lower layer pad is a molded body of foamed polypropylene or polystyrene foam. According to a third aspect of the present invention, there is provided a vehicular cushion pad according to the first or second aspect of the present invention, wherein the rear side of the core pad bears the side wall of the dent and is raised from the bottom of the dent to the back side to partition the dent. The existing portion is formed to extend in a peninsular shape, and the back surface of the extended portion is formed to be a flat surface. A vehicle cushion pad according to a fourth aspect of the present invention is the vehicle cushion pad according to the third aspect, wherein the back surface of the peripheral portion surrounding the recess is formed in a step surface recessed in a step shape from the back surface of the core pad, and the step surface and the step The back surface of the extended portion is formed as a uniform flat surface.
The gist of the invention described in claim 5 is a method for manufacturing a cushion pad for a vehicle having at least a seat surface portion with which a passenger abuts, made of a soft polyurethane foam, and provided with an air distribution channel. A core pad comprising a non-breathable foam smaller than a soft polyurethane foam, provided with a recess for the air distribution channel on the back surface side, and provided with a plurality of through holes penetrating from the bottom of the recess to the surface side A plurality of pins protruding from the upper mold surface of the foam mold are respectively inserted into the through-holes according to the above and the back surface side of the core pad is brought into contact with the upper mold surface so that the core pad is placed on the upper mold surface. Next, the raw material for the flexible polyurethane foam is injected onto the lower mold surface, and then the mold is closed by bringing the tip of the pin into contact with the lower mold surface forming the seat surface portion. Subsequently, a seating surface portion is provided on the design surface side, and the inner surface side of the core pad is The upper layer pad of the flexible polyurethane foam bonded to the surface is subjected to foam molding, and then removed from the mold. Thereafter, the apparent density is composed of a non-breathable foam having a smaller apparent density than that of the flexible polyurethane foam. Covering the opening of the recess so as to form an air distribution channel on the upper surface side of the lower layer pad through which the air introduction hole penetrates to the upper surface side, and conducting the air introduction hole into the air distribution channel, the core pad The lower layer pad is joined to the back surface of the vehicle. According to a sixth aspect of the present invention, there is provided a vehicle cushion pad manufacturing method according to the fifth aspect, wherein the non-breathable foam of the core pad and the lower layer pad is a molded body of foamed polypropylene or foamed polystyrene. According to a seventh aspect of the present invention, there is provided a vehicle cushion pad manufacturing method according to the fifth or sixth aspect of the present invention, wherein the dent is formed on the back surface side of the core pad so as to bear the side wall of the dent and to be raised from the bottom of the dent. The extending portion that partitions the peninsula is formed in a peninsular shape, the back surface of the extending portion is formed in a flat surface, and the back surface of the peripheral portion surrounding the recess is recessed in a stepped shape from the back surface of the core pad. The step surface and the back surface of the extended portion are formed on a uniform flat surface.

本発明の車両用クッションパッド及びその製造方法は、座面部分を軟質ポリウレタン発泡体の上層パッドで形成する一方、該軟質ポリウレタン発泡体の見掛け密度よりも見掛け密度が小の非通気性発泡体で構成した下層パッド,芯パッドとで配風流路,エア導入孔,透孔が低コストで形成され、さらに前記上層パッドにエア吹出孔が透孔に連通形成されるので、クッション性等の快適性を確保しつつ、軽量化され、且つ着座した乗員へ温度調整された空気を送り込むことが可能になるなど優れた効果を発揮する。 The vehicle cushion pad and the manufacturing method thereof according to the present invention is a non-breathable foam in which the seat surface portion is formed by the upper layer pad of the soft polyurethane foam, and the apparent density is smaller than the apparent density of the soft polyurethane foam. The lower layer pad and the core pad are configured with air distribution channels, air introduction holes, and through holes at low cost, and the air blowing holes are formed in the upper layer pad so as to communicate with the through holes. It is possible to deliver air that is lighter and temperature-adjusted to a seated occupant.

本発明のクッションパッド及びその製造方法の一形態で、型開状態にある発泡型に芯パッドをセットし且つ発泡原料を注入する説明断面図である。It is explanatory drawing sectional drawing which sets a core pad to the foaming mold in a mold open state, and inject | pours a foaming raw material with one form of the cushion pad of this invention, and its manufacturing method. 図１の発泡原料注入後、型閉じした様子を示す説明断面図である。FIG. 2 is an explanatory cross-sectional view showing a state in which the mold is closed after injection of the foaming raw material in FIG. 1. 芯パッド付き上層パッドを発泡成形した説明断面図である。It is explanatory sectional drawing which carried out the foam molding of the upper layer pad with a core pad. 脱型した図３の芯パッド付き上層パッドに、下層パッドを接合してクッションパッドとした説明断面図で、図６のIV-IV線矢視図である。FIG. 7 is an explanatory cross-sectional view in which a lower layer pad is joined to the removed upper layer pad with a core pad of FIG. 3 to form a cushion pad, and is a view taken along line IV-IV in FIG. 6. 脱型した図３の芯パッド付き上層パッドと下層パッドの斜視図である。It is the perspective view of the upper layer pad with a core pad and lower layer pad of FIG. 3 which were demolded. 図４に示したクッションパッドの対応斜視図である。It is a corresponding perspective view of the cushion pad shown in FIG. 図６のクッションパッドを意匠面側から見た斜視図である。It is the perspective view which looked at the cushion pad of FIG. 6 from the design surface side. 図５に代わる他態様の芯パッドと下層パッドの斜視図である。FIG. 6 is a perspective view of a core pad and a lower layer pad of another mode instead of FIG. 5. 上層パッドを成形する型開状態を示し、図１に対応する説明断面図である。FIG. 2 is an explanatory sectional view corresponding to FIG. 1, showing a mold open state in which an upper layer pad is molded. 図３に対応する説明断面図である。FIG. 4 is an explanatory cross-sectional view corresponding to FIG. 3. 他態様の芯パッド付き上層パッドと下層パッドの説明断面図である。It is explanatory sectional drawing of the upper layer pad with a core pad of another aspect, and a lower layer pad. 図１１の芯パッドに下層パッドを接合しクッションパッドとした説明断面図である。FIG. 12 is an explanatory cross-sectional view in which a lower layer pad is joined to the core pad of FIG. 11 to form a cushion pad.

以下、本発明に係る車両用クッションパッド（以下、単に「クッションパッド」ともいう。）及びその製造方法について詳述する。図１〜図１２は本発明のクッションパッド及びその製造方法の一形態で、図１はその製法に用いる型開状態にある発泡型に芯パッドをセットし且つ発泡原料を注入する説明断面図、図２は図１の発泡原料注入後、型閉じした説明断面図、図３は芯パッド付き上層パッドを発泡成形した説明断面図、図４は脱型した図３の芯パッド付き上層パッドに、下層パッドを接合してクッションパッドとした説明断面図、図５は脱型した図３の芯パッド付き上層パッドと下層パッドの斜視図、図６は図４に示したクッションパッドの対応斜視図、図７は図６のクッションパッドを意匠面側から見た斜視図、図８は図５に代わる他態様の芯パッドと下層パッドの斜視図、図９は図１に対応する型開状態の説明断面図、図１０は図３に対応する説明断面図、図１１は図１０の芯パッド付き上層パッドと下層パッドの説明断面図、図１２は図１１の芯パッドに下層パッドを接合しクッションパッドとした説明断面図である。図９の芯パッドは図８のIX-IX線矢視図に相当する。
各図は図面を判り易くするため簡略図示し、また本発明と直接関係しない部分は省略する。芯パッド２と下層パッド６は断面表示のハッチングを省く。 Hereinafter, a vehicle cushion pad (hereinafter also simply referred to as “cushion pad”) and a method for manufacturing the same according to the present invention will be described in detail. FIGS. 1-12 is one form of the cushion pad of this invention, and its manufacturing method, FIG. 1 is explanatory sectional drawing which sets a core pad to the foaming mold in the mold open state used for the manufacturing method, and inject | pours a foaming raw material, 2 is an explanatory cross-sectional view in which the mold is closed after injection of the foaming raw material in FIG. 1, FIG. 3 is an explanatory cross-sectional view in which an upper layer pad with a core pad is foam-molded, and FIG. 4 is an upper layer pad with a core pad in FIG. FIG. 5 is a perspective view of the upper layer pad with the core pad and the lower layer pad of FIG. 3 removed, FIG. 6 is a corresponding perspective view of the cushion pad shown in FIG. 7 is a perspective view of the cushion pad of FIG. 6 as viewed from the design surface side, FIG. 8 is a perspective view of a core pad and a lower layer pad of another embodiment instead of FIG. 5, and FIG. 9 is an explanation of the mold open state corresponding to FIG. FIG. 10 is an explanatory sectional view corresponding to FIG. 1 is an explanatory cross-sectional view of the upper pad and the lower padded core pads 10, FIG. 12 is an explanatory sectional view of a cushion pad bonded to the lower pad core pad of Figure 11. The core pad in FIG. 9 corresponds to the view taken along the line IX-IX in FIG.
Each figure is simplified for easy understanding of the drawings, and portions not directly related to the present invention are omitted. The core pad 2 and the lower layer pad 6 omit the cross-sectional display hatching.

（１）車両用クッションパッドの製造方法
車両用クッションパッドの製造方法は、少なくとも乗員が当接する座面部分４１を軟質ポリウレタン発泡体で構成して、配風流路ｕを備えた車両用クッションパッドの製造方法である。発泡型７を用い、芯パッド２をインサートして、軟質ポリウレタン発泡体の上層パッド４を発泡成形して芯パッド２付き上層パッド４を成形する。そして、脱型後、芯パッド裏面２ｂに下層パッド６を接合させてクッションパッドＰを造る。本クッションパッドＰは、車両用後部座席や運転座席,助手席等の座席シートの座部に使用される。ここでは、図７のような運転座席のクッションパッドＰに適用する。上層パッド４の発泡成形に先立ち、芯パッド２,下層パッド６,発泡型７が用意される。 (1) Manufacturing Method of Vehicle Cushion Pad A vehicle cushion pad manufacturing method includes a vehicle cushion pad having a wind distribution channel u in which at least a seat surface portion 41 with which an occupant contacts is made of a soft polyurethane foam. It is a manufacturing method. Using the foaming mold 7, the core pad 2 is inserted, and the upper layer pad 4 of the soft polyurethane foam is foam-molded to form the upper layer pad 4 with the core pad 2. Then, after demolding, the cushion pad P is made by bonding the lower layer pad 6 to the core pad back surface 2b. The cushion pad P is used for seats of seats such as a rear seat for a vehicle, a driver seat, and a passenger seat. Here, the present invention is applied to the cushion pad P of the driver's seat as shown in FIG. Prior to foam molding of the upper layer pad 4, the core pad 2, the lower layer pad 6, and the foaming mold 7 are prepared.

芯パッド２は、上層パッド４を形成する軟質ポリウレタン発泡体の見掛け密度よりも見掛け密度が小の非通気性発泡体で構成し、図４のごとくクッションパッドＰの裏面側に配される芯部材である。芯パッド２と上層パッド４との密度比較は、発泡前の素材の密度でなく、発泡後の見掛け密度で比較する。
上層パッド４の発泡成形に先立ち、予め発泡成形された芯パッド２,下層パッド６が用意される。芯パッド２には、裏面２ｂ側に裏面過半部の大きさがある配風流路ｕ用凹み２１が設けられ、さらに凹み２１の凹底２１１から表面２ａ側へ貫通する透孔２３が複数設けられる（図２,図５）。本実施形態は、配風流路用凹み２１が図５のごとく皿状で略方形に窪む形にする。透孔２３の数を四つとする。ここで、芯パッド２の「表面側」,「裏面側」は、車両に取付け姿態にある図７のクッションパッドＰでいえば、文字通り紙面の「表面側」,紙面の「裏面側」となる。上層パッド４の「意匠面側」,「内面側」や、下層パッド６の「上面側」，「下面側」も、車両に取付け姿態にある図７のクッションパッドＰでいえば、紙面の「表面側」,紙面の「裏面側」となり、同じ意である。文言を使い分けて部位を特定し易くしている。
凹み２１を取り囲む周縁部沿い裏面は、芯パッド２の裏面２ｂから落差壁２６２を介して段差状に凹ませた段差面２６１のある段差２６に形成され（図１）、且つ略一定幅の段差面２６１が一様の平坦面に形成される。符号２８は発泡型７に芯パッド２をセットした時、芯パッド２の外方へせり出す出っ張り部の上端面である。符号２９は芯パッド２に設けた開孔で、符号２９１は裏面側に配される大径部、符号２９２は小径部、符号２９３は受面を示す。芯パッド２を図２のように上型９にセットした時、受面２９３と上型型面９１との間にスペースが確保される。 The core pad 2 is composed of a non-breathable foam whose apparent density is smaller than the apparent density of the soft polyurethane foam forming the upper layer pad 4, and is disposed on the back side of the cushion pad P as shown in FIG. It is. The density comparison between the core pad 2 and the upper layer pad 4 is based not on the density of the material before foaming but on the apparent density after foaming.
Prior to foam molding of the upper layer pad 4, a core pad 2 and a lower layer pad 6 previously foam-molded are prepared. The core pad 2 is provided with an air distribution channel u recess 21 having a size of the majority of the back surface on the back surface 2b side, and a plurality of through holes 23 penetrating from the bottom 211 of the recess 21 to the front surface 2a side. (FIGS. 2 and 5). In the present embodiment, the air distribution channel recess 21 is dish-shaped and recessed in a substantially square shape as shown in FIG. The number of through holes 23 is four. Here, “front side” and “rear side” of the core pad 2 are literally “front side” of the paper surface and “rear side” of the paper surface in the cushion pad P of FIG. . The “design surface side” and “inner surface side” of the upper layer pad 4 and the “upper surface side” and “lower surface side” of the lower layer pad 6 are also “cushion pads P in FIG. "Front side" and "Back side" of the page, the same meaning. The site is easily identified by using different words.
The back surface along the peripheral edge surrounding the recess 21 is formed as a step 26 having a step surface 261 that is recessed from the back surface 2b of the core pad 2 through the drop wall 262 (FIG. 1), and a step having a substantially constant width. The surface 261 is formed as a uniform flat surface. Reference numeral 28 denotes an upper end surface of a protruding portion that protrudes outward from the core pad 2 when the core pad 2 is set in the foaming mold 7. Reference numeral 29 denotes an opening provided in the core pad 2, reference numeral 291 denotes a large-diameter portion disposed on the back side, reference numeral 292 denotes a small-diameter portion, and reference numeral 293 denotes a receiving surface. When the core pad 2 is set on the upper die 9 as shown in FIG. 2, a space is secured between the receiving surface 293 and the upper die surface 91.

下層パッド６は図４,図５ごとくの塊状体で、非通気性発泡体で構成されて、上面６ａ側が、配風流路ｕを形成するように前記凹み２１の開口２１０を覆って、前記芯パッド２の裏面２ｂに接合する。芯パッド裏面２ｂに接合してなる下層パッド６の下面６ｂはクッションパッドＰの裏面に合わせた形状とする。そして、下層パッド６の下面６ｂ側から該配風流路ｕ内へ貫通するエア導入孔６１が設けられる。
下層パッド６を構成する非通気性発泡体の見掛け密度は、軟質ポリウレタン発泡体の見掛け密度よりも小さい。下層パッド６(及び芯パッド２)を構成する非通気性発泡体は、その見掛け密度が上層パッド４を形成する軟質ポリウレタン発泡体の見掛け密度よりも小さければ充足するが、非通気性の発泡ポリプロピレン又は発泡スチロールの成形体がより好ましい。例えばビーズ法発泡スチロールの発泡スチロールの成形体は、気泡が内部に密閉された非通気性発泡体となっており、芯パッド２の凹み２１や、下層パッド６で該凹み２１を覆った配風流路ｕからは、空調エアが漏れ出さない。且つ、体積の大部分が気体で軽量にして、その見掛け密度を軟質ポリウレタン発泡体の見掛け密度よりも小さくできる。ビーズ法発泡ポリプロピレンの発泡ポリプロピレンも発泡スチロールに酷似し、気泡が内部に密閉された非通気性発泡体にして、配風流路用凹み２１が在る芯パッド２や凹み２１を覆う下層パッド６の材料として機能的に優れ、且つその見掛け密度を小さくできる。下層パッド６の非通気性発泡体は、芯パッド２の非通気性発泡体と異にしてもよいが、同一材料を用いるとクッションパッドＰの製造が容易になる。本実施形態の芯パッド２,下層パッド６も発泡ポリプロピレンの同一材料を用いる。発泡ポリプロピレンは、発泡ポリスチレン（発泡スチロール）よりも弾力があり、クッションパッド用芯パッド２,下層パッド６の構成材としてさらに好ましくなっている。
符号６３は、配風流路ｕの断面積が大きくなるよう、凹み２１の開口２１０を覆う下層パッド上面６ａの部位がへこむ凹所を示す。 The lower layer pad 6 is a mass as shown in FIGS. 4 and 5 and is made of a non-breathable foam. The upper surface 6a side covers the opening 210 of the recess 21 so as to form the air distribution channel u, and the core Bonded to the back surface 2 b of the pad 2. The lower surface 6b of the lower layer pad 6 bonded to the core pad back surface 2b is shaped to match the back surface of the cushion pad P. An air introduction hole 61 that penetrates from the lower surface 6 b side of the lower layer pad 6 into the air distribution flow path u is provided.
The apparent density of the non-breathable foam constituting the lower layer pad 6 is smaller than the apparent density of the soft polyurethane foam. The non-breathable foam constituting the lower layer pad 6 (and the core pad 2) is sufficient if the apparent density is lower than the apparent density of the soft polyurethane foam forming the upper layer pad 4, but the non-breathable foamed polypropylene. Or the molded object of a polystyrene foam is more preferable. For example, a foamed polystyrene molded body of a bead method foamed polystyrene is a non-breathable foam with air bubbles sealed inside, and an air distribution channel u in which the recess 21 of the core pad 2 or the lower layer pad 6 covers the recess 21. Does not leak air-conditioning air. In addition, the bulk of the volume can be made light with gas, and the apparent density can be made smaller than the apparent density of the flexible polyurethane foam. The foamed polypropylene of the beaded foamed polypropylene is also made of a non-breathable foam with air bubbles sealed inside, which is very similar to polystyrene foam, and the material for the core pad 2 and the lower layer pad 6 covering the recesses 21 with the air distribution channel recesses 21. As a function, the apparent density can be reduced. The non-breathable foam of the lower layer pad 6 may be different from the non-breathable foam of the core pad 2, but when the same material is used, the cushion pad P can be easily manufactured. The core pad 2 and the lower layer pad 6 of this embodiment are also made of the same foamed polypropylene material. Foamed polypropylene is more elastic than foamed polystyrene (foamed polystyrene) and is more preferable as a constituent material for the cushion pad core pad 2 and the lower layer pad 6.
Reference numeral 63 indicates a recess in which a portion of the lower surface pad upper surface 6a covering the opening 210 of the recess 21 is recessed so that the cross-sectional area of the air distribution channel u is increased.

発泡型７は、図１ごとくの分割型で、下型８と上型９はヒンジ７１により開閉可能に接続されている。ヒンジ７１を支点に図２のごとく型閉じすると、全体が椀状にへこんで座面部分４１の意匠面４ａを形成する下型型面８１と、中央にへこみを有するものの全体がやや凸状にして芯パッド２の裏面２ｂに合わせた上型型面９１とで、芯パッド２付き上層パッド４のキャビティＣをつくる。上型型面９１に複数のピン９２が立設する。各ピン９２はピン径が透孔２３の孔径に略等しく且つピン長が長く、芯パッド２の上型型面９１へのセットで、各透孔２３に挿通して芯パッド２から突き出す。本実施形態は、四つの透孔２３に対応する上型型面９１の部位に四本のピン９２を突出形成するようにしている。型閉じで、各ピン９２の先端が下型型面８１に図２のごとく当接する。尚、図１〜図３の発泡型７は、車両設置状態に在る図７のクッションパッドＰと上下が逆の姿態で、該クッションパッドＰに係る芯パッド２付き上層パッド４を造る型構造になっている。 The foaming mold 7 is a split mold as shown in FIG. 1, and the lower mold 8 and the upper mold 9 are connected by a hinge 71 so as to be opened and closed. When the mold is closed as shown in FIG. 2 using the hinge 71 as a fulcrum, the entire lower part mold surface 81 that forms a design surface 4a of the seating surface portion 41 by being dented in a bowl shape, and the whole of the one having a dent in the center is slightly convex. The cavity C of the upper layer pad 4 with the core pad 2 is formed with the upper mold surface 91 matched with the back surface 2b of the core pad 2. A plurality of pins 92 are erected on the upper mold surface 91. Each pin 92 has a pin diameter substantially equal to the hole diameter of the through hole 23 and a long pin length, and is inserted into each through hole 23 and protrudes from the core pad 2 in a set on the upper mold surface 91 of the core pad 2. In the present embodiment, four pins 92 are formed so as to protrude from the portion of the upper mold surface 91 corresponding to the four through holes 23. When the mold is closed, the tip of each pin 92 comes into contact with the lower mold surface 81 as shown in FIG. 1 to 3 is a mold structure in which the upper pad 4 with the core pad 2 relating to the cushion pad P is formed in an upside down manner with respect to the cushion pad P in FIG. It has become.

前記発泡型７,芯パッド２,下層パッド６を用いて、クッションパッドＰが例えば次のように製造される。
まず、発泡型７を図１の型開状態とする。この型開状態の上型９に芯パッド２をセットする。芯パッド２に設けた各透孔２３に複数のピン９２を夫々挿通し、且つ上型型面９１に凹み２１が在る芯パッド裏面２ｂ側を当接させて、該芯パッド２を上型型面９１にセットする。凹み２１の凹底２１１にも上型型面９１が当接する。
上型型面９１へ芯パッド２をセットした後、椀状にへこむ下型型面８１上に、注入ノズルＮＬ等を使用して上層パッド４成形用発泡原料ｇ（軟質ポリウレタン発泡体用原料）を所定量注入する。 The cushion pad P is manufactured as follows using the foaming mold 7, the core pad 2, and the lower layer pad 6, for example.
First, the foaming mold 7 is set to the mold open state of FIG. The core pad 2 is set on the upper mold 9 in the mold open state. A plurality of pins 92 are respectively inserted into the respective through holes 23 provided in the core pad 2 and the core pad back surface 2b side where the recess 21 is present is brought into contact with the upper mold surface 91, so that the core pad 2 is placed in the upper mold. Set on the mold surface 91. The upper mold surface 91 also comes into contact with the concave bottom 211 of the recess 21.
After the core pad 2 is set on the upper mold surface 91, the upper pad 4 molding raw material g (raw material for flexible polyurethane foam) is formed on the lower mold surface 81 which is recessed like a bowl using an injection nozzle NL or the like. A predetermined amount is injected.

次いで、クッションパッドＰの座面部分４１を形成する下型型面８１側に、前記ピン９２の先端を当接させて型閉じする。尚、型閉じ時のピン９２が当接する下型型面８１のピン当て部８３を図２のごとくアール曲面状に少し盛り上げて、ピン９２が上層パッド４に形成するエア吹出孔４５の出口周りの意匠面４ａを綺麗にしている。 Next, the tip of the pin 92 is brought into contact with the lower mold surface 81 side forming the seating surface portion 41 of the cushion pad P to close the mold. Incidentally, the pin abutting portion 83 of the lower die surface 81 with which the pin 92 abuts when the die is closed is slightly raised in a rounded shape as shown in FIG. 2, and around the outlet of the air blowing hole 45 formed in the upper layer pad 4 The design surface 4a is clean.

型閉じ後、意匠面４ａ側に座面部分４１を有する、軟質ポリウレタン発泡体からなる上層パッド４を発泡成形する。上層パッド４の意匠面４ａと反対側にあたる内面４ｂ側が芯パッド２の表面２ａに接合し、芯パッド２付き上層パッド４となる。発泡成形過程では、芯パッド２から突き出すピン９２周りのキャビティＣに、注入された発泡原料ｇが、上層パッド４となって発泡成形され、芯パッド２から突き出すピン９２がエア吹出孔４５を形成する。該エア吹出孔４５を形成する各ピン９２が透孔２３に挿通しているので、各エア吹出孔４５は各透孔２３に夫々導通する。
ところで、軟質ポリウレタン発泡体の上層パッド４が、発泡成形されても、芯パッド２を構成する発泡ポリプロピレン,発泡スチロール等の非通気性発泡体とは接着性に乏しく、そのままでは両者の一体化が不十分となる虞がある。双方を両面テープや粘着剤に頼ってもよいが、本実施形態は、図１のごとく芯パッド２に受面２９３付き開孔２９や、セット時に上端面２８が略水平になる出っ張り部等を形成して、芯パッド２と上層パッド４との一体化を図っている。上層パッド４の発泡成形時に、発泡原料ｇが開孔２９の小径部２９２を潜り、大径部２９１側の受面２９３上に発泡原料ｇが浸入して発泡硬化し、大径部２９１内を埋める露出部分４３が受面２９３に受け止められて、芯パッド２と上層パッド４の一体化を図る（図３）。また、上層パッド４の発泡成形で、該上層パッド４が図４のごとく芯パッド２の出っ張り部上端面２８に乗り上げ、これを該上層パッド４が巻き込む形となって、両者の一体化を図っている。 After mold closing, the upper layer pad 4 made of a soft polyurethane foam having a seat surface portion 41 on the design surface 4a side is subjected to foam molding. The inner surface 4b side opposite to the design surface 4a of the upper layer pad 4 is joined to the surface 2a of the core pad 2 to form the upper layer pad 4 with the core pad 2. In the foam molding process, the foam material g injected into the cavity C around the pin 92 protruding from the core pad 2 is foam-molded as the upper layer pad 4, and the pin 92 protruding from the core pad 2 forms the air blowing hole 45. To do. Since each pin 92 forming the air blowing hole 45 is inserted into the through hole 23, each air blowing hole 45 is electrically connected to each through hole 23.
By the way, even if the upper layer pad 4 of the soft polyurethane foam is foam-molded, it has poor adhesion to non-breathable foams such as foamed polypropylene and foamed polystyrene constituting the core pad 2, and the integration of the two is not possible as it is. May be sufficient. Although both sides may depend on a double-sided tape or an adhesive, in the present embodiment, as shown in FIG. 1, the core pad 2 has an opening 29 with a receiving surface 293, a protruding portion where the upper end surface 28 is substantially horizontal when set, and the like. In this way, the core pad 2 and the upper layer pad 4 are integrated. At the time of foam molding of the upper layer pad 4, the foam raw material g dives through the small diameter portion 292 of the opening 29, and the foam raw material g penetrates into the receiving surface 293 on the large diameter portion 291 side and foams and cures, and the inside of the large diameter portion 291 The exposed exposed portion 43 is received by the receiving surface 293, and the core pad 2 and the upper layer pad 4 are integrated (FIG. 3). Further, in the foam molding of the upper layer pad 4, the upper layer pad 4 rides on the upper end surface 28 of the protruding portion of the core pad 2 as shown in FIG. ing.

上層パッド４の発泡成形を終え、脱型すれば、芯パッド２付き上層パッド４が得られる。脱型時に上型９を開くと、上型９側に発泡成形を終えた芯パッド２付き上層パッド４がピン９２に保持された状態で現れる。作業者は立ったままの楽な姿勢で、芯パッド２付き上層パッド４をピン９２から外し脱型できる。
しかる後、エア導入孔６１を貫通させた下層パッド６の上面６ａ側で配風流路ｕを形成するように凹み２１の開口２１０を覆い、且つエア導入孔６１を配風流路ｕと導通させて芯パッド２の裏面２ｂに下層パッド６を接合させる（図４）。符号６６１は芯パッド裏面２ｂの段差面２６１と接合する下層パッド６側の当接面を示す。下層パッド上面６ａ側で配風流路ｕを形成するように凹み２１の開口２１０を覆って、芯パッド裏面２ｂに下層パッド６を接合させ、図４,図６のような所望の車両用クッションパッドＰとする。このクッションパッドＰに図示しない表皮を被せれば、車両用座席シートのシートクッションが出来上がる。
下層パッド６と芯パッド２との接合は、両者間に両面テープを介在させた一体化接合や接着剤による接着接合とする。図中、符号８４は横溝形成部、符号８９,符号９９は型合せ面、符号４Ａはメイン部、符号４Ｂはサイド部、符号４Ｃはバックレストとの合わせ部、符号４９は吊溝で、符号４９１は縦溝、符号４９２は横溝を示す。 If foam molding of the upper layer pad 4 is finished and removed, the upper layer pad 4 with the core pad 2 is obtained. When the upper mold 9 is opened at the time of demolding, the upper layer pad 4 with the core pad 2 that has been subjected to foam molding appears on the upper mold 9 side while being held by the pins 92. The worker can remove the upper layer pad 4 with the core pad 2 from the pin 92 in a comfortable posture while standing.
After that, the opening 210 of the recess 21 is covered so as to form the air distribution channel u on the upper surface 6a side of the lower layer pad 6 penetrating the air introduction hole 61, and the air introduction hole 61 is electrically connected to the air distribution channel u. The lower layer pad 6 is joined to the back surface 2b of the core pad 2 (FIG. 4). Reference numeral 661 denotes a contact surface on the lower layer pad 6 side that is joined to the step surface 261 of the core pad back surface 2b. The lower layer pad 6 is joined to the core pad back surface 2b so as to form the air distribution channel u on the lower layer pad upper surface 6a side, and the desired lower cushion pad as shown in FIGS. P. If this cushion pad P is covered with a skin (not shown), a seat cushion for a vehicle seat is completed.
The bonding between the lower layer pad 6 and the core pad 2 is an integrated bonding with a double-sided tape interposed between them or an adhesive bonding with an adhesive. In the figure, reference numeral 84 is a transverse groove forming portion, reference numerals 89 and 99 are mold matching surfaces, reference numeral 4A is a main portion, reference numeral 4B is a side portion, reference numeral 4C is a matching portion with a backrest, reference numeral 49 is a hanging groove, Reference numeral 491 denotes a vertical groove, and reference numeral 492 denotes a horizontal groove.

図８〜図１２は、図１〜図７に代わる他態様のクッションパッドＰの製造方法を図示する。
ここでは、図８のような芯パッド２,下層パッド６が用意される。下層パッド６は図示のごとく盤状体とする。芯パッド２には、その裏面側で、図１〜図７の皿状で略方形に大きく窪む凹み２１を形成しながらも、該凹み２１内へ張り出す延在部分２５が設けられる。凹み２１の側壁２１２を担ってその凹底２１１よりも裏面２ｂ側へ***して、方形の凹み２１を略二分する形で、該凹み２１を仕切る延在部分２５が半島状に延出形成される。本発明でいう凹み２１を仕切るとは、図８のように延在部分２５により凹み２１内で空調エアが流れるように分けて区画化する意で、凹み２１の分断はしない。延在部分２５の裏面２５ｂは図示のごとく平坦面に形成される。さらに凹み２１を囲む周縁部２２の裏面２２ｂが、芯パッド２の裏面２ｂから段差状に凹ませた段差面２６１に形成され、且つ該段差面２６１と前記延在部分２５の裏面２５ｂとが一様の平坦面に形成された芯パッド２とする。延在部分２５,段差面２６１に対面接合する下層パッド６の部分も、一様な平面になっている。下層パッド６が凹み２１の開口２１０を覆って配風流路ｕを形成する際、下層パッド６が延在部分２５,段差面２６１に密着接合する。
図８の下層パッド６に設けたエア導入孔６１は図１〜図７と同様、一つとするが、芯パッド２に設けた透孔２３は六つとする。
発泡型７は、芯パッド２,上層パッド４に対応するキャビティＣを備えたものが用意される。上型型面９１には芯パッド２の六つの透孔２３に対応する上型型面９１の部位に六本のピン９２が起立する。 8 to 12 illustrate a method of manufacturing the cushion pad P according to another embodiment instead of FIGS. 1 to 7.
Here, a core pad 2 and a lower layer pad 6 as shown in FIG. 8 are prepared. The lower layer pad 6 is a disc-like body as shown in the figure. The core pad 2 is provided with an extending portion 25 that protrudes into the recess 21 while forming the recess 21 that has a dish-like shape in FIGS. An extending portion 25 that divides the concave portion 21 is formed in a peninsula shape so as to bear the side wall 212 of the concave portion 21 and rise from the concave bottom 211 toward the back surface 2b. The The partitioning of the recess 21 in the present invention means that the extended portion 25 divides the recess 21 so that air-conditioned air flows in the recess 21 as shown in FIG. 8, and the recess 21 is not divided. The back surface 25b of the extended portion 25 is formed on a flat surface as shown in the figure. Further, a back surface 22b of the peripheral edge portion 22 surrounding the recess 21 is formed on a step surface 261 that is recessed in a step shape from the back surface 2b of the core pad 2, and the step surface 261 and the back surface 25b of the extending portion 25 are identical. The core pad 2 is formed on such a flat surface. The portion of the lower layer pad 6 that faces the extended portion 25 and the stepped surface 261 is also a uniform plane. When the lower layer pad 6 covers the opening 210 of the recess 21 to form the air distribution channel u, the lower layer pad 6 is tightly bonded to the extended portion 25 and the step surface 261.
The number of the air introduction holes 61 provided in the lower layer pad 6 in FIG. 8 is one as in FIGS. 1 to 7, but the number of the through holes 23 provided in the core pad 2 is six.
The foaming mold 7 is prepared with a cavity C corresponding to the core pad 2 and the upper layer pad 4. On the upper mold surface 91, six pins 92 stand on the portion of the upper mold surface 91 corresponding to the six through holes 23 of the core pad 2.

図４に代わる他態様の図１２に示すクッションパッドＰは、図８,図９の芯パッド２,下層パッド６,発泡型７を用いて、次のようにして製造される。
まず、図９の型開状態下、芯パッド２の各透孔２３に、上型型面９１から突出する各ピン９２を夫々挿通し且つ芯パッド裏面２ｂ側を上型型面９１に当接させて、該芯パッド２をセットする。ここで、発泡型７への芯パッド２のセットに際し、上型型面９１に凹み２１が在る芯パッド裏面２ｂ側を当接させるが、図２のごとく凹底２１１に上型型面９１は当接しない。凹み２１周囲の段差面２６１に上型型面９１の対応部分が当接シールし、凹み２１内を空所に保つ。上型９は、凹み２１内へ張り出す型面部分がなしの型面９１になっている。 A cushion pad P shown in FIG. 12 in another embodiment instead of FIG. 4 is manufactured as follows using the core pad 2, the lower layer pad 6, and the foaming mold 7 shown in FIGS.
First, under the mold open state of FIG. 9, each pin 92 protruding from the upper mold surface 91 is inserted into each through hole 23 of the core pad 2, and the core pad back surface 2 b side is in contact with the upper mold surface 91. The core pad 2 is set. Here, when the core pad 2 is set to the foaming mold 7, the core pad back surface 2b side where the recess 21 is present is brought into contact with the upper mold surface 91. However, as shown in FIG. Does not touch. The corresponding portion of the upper mold surface 91 abuts and seals with the step surface 261 around the recess 21 to keep the inside of the recess 21 in a void. The upper mold 9 is a mold surface 91 having no mold surface portion protruding into the recess 21.

次に、下型型面８１上に軟質ポリウレタン発泡体用原料ｇを注入し、さらに座面部分４１を形成する下型型面８１側に、前記ピン９２の先端を当接させて型閉じする。
続いて、意匠面４ａ側に座面部分４１を有する軟質ポリウレタン発泡体たる上層パッド４を発泡成形し（図１０）、芯パッド２付き上層パッド４とする。上層パッド４の内面４ｂ側が芯パッド２の表面２ａに接合する。ここで、図１０のごとく上型９にセットされた芯パッド２は、キャビティＣ内で、下型型面８１に近い側に水平外方に張り出す張出部２７１が配される一方、上型型面９１に近い側に水平内方に引っ込む後退部２７２が配される。上層パッド４が後退部２７２まで覆って張出部２７１を巻き込む形で芯パッド２付き上層パッド４として発泡成形され、両者が一体化する。 Next, the raw material g for the flexible polyurethane foam is injected onto the lower mold surface 81, and the tip of the pin 92 is brought into contact with the lower mold surface 81 forming the seat surface portion 41 to close the mold. .
Subsequently, the upper layer pad 4, which is a soft polyurethane foam having the seat surface portion 41 on the design surface 4 a side, is foam-molded (FIG. 10) to obtain the upper layer pad 4 with the core pad 2. The inner surface 4 b side of the upper layer pad 4 is bonded to the surface 2 a of the core pad 2. Here, the core pad 2 set in the upper die 9 as shown in FIG. 10 is provided with an overhanging portion 271 projecting horizontally outward on the side close to the lower die surface 81 in the cavity C. A receding portion 272 that is retracted horizontally inward is disposed on the side close to the mold surface 91. The upper layer pad 4 is foam-molded as the upper layer pad 4 with the core pad 2 so as to cover the retracted portion 272 and wind the overhang portion 271, and both are integrated.

その後、前記芯パッド２付き上層パッド４を脱型する。しかる後、脱型した芯パッド２付き上層パッド４に対し、下層パッド６の上面側で配風流路ｕを形成するように凹み２１の開口２１０を覆い、且つエア導入孔６１が配風流路ｕ内へ導通するようにして、芯パッド裏面２ｂに下層パッド６を接合させて所望のクッションパッドＰとする（図１１,図１２）。芯パッド裏面２ｂと下層パッド６との接合は、接着剤等を介在させた接着接合とする。他の構成は図１〜図７のクッションパッドＰの説明と同様で、その説明を省く。図１〜図７と同一符号は同一又は相当部分を示す。 Thereafter, the upper layer pad 4 with the core pad 2 is removed. Thereafter, the upper layer pad 4 with the core pad 2 removed from the mold is covered with the opening 210 of the recess 21 so that the air distribution channel u is formed on the upper surface side of the lower layer pad 6, and the air introduction hole 61 is provided with the air distribution channel u. The lower layer pad 6 is joined to the core pad back surface 2b so as to be inwardly conductive, thereby obtaining a desired cushion pad P (FIGS. 11 and 12). The bonding between the core pad back surface 2b and the lower layer pad 6 is an adhesive bonding with an adhesive or the like interposed therebetween. The other structure is the same as that of the cushion pad P of FIGS. 1-7, and the description is omitted. 1 to 7 indicate the same or corresponding parts.

（２）クッションパッド
図１〜図７の上記製造方法等で得られるクッションパッドＰは、少なくとも乗員が当接する座面部分４１を軟質ポリウレタン発泡体で形成して、配風流路ｕを備えた車両用クッションパッドＰであって、芯パッド２と上層パッド４と下層パッド６とを具備するクッションパッドＰである。
芯パッド２は、非通気性発泡体で形成され、裏面２ｂ側に配風流路用凹み２１が設けられる。凹み２１は芯パッド裏面２ｂで、図５のごとく裏面過半部を占めて、芯パッド裏面２ｂ側から表面２ａ側へ向けて略方形の形で皿状に窪む。凹み２１には、その凹底２１１から表面２ａ側へ貫通する透孔２３が複数（ここでは四個）設けられる。
上層パッド４は、軟質ポリウレタン発泡体で形成され、意匠面４ａ側に前記座面部分４１が設けられる（図４）。上層パッド４の内面４ｂ側は芯パッド表面２ａに接合し、さらに該内面４ｂ側から意匠面４ａ側へ貫通するエア吹出孔４５が複数（ここでは四個）設けられる。各エア吹出孔４５が各透孔２３に夫々導通するように配される。
下層パッド６は、非通気性発泡体で形成され、上面６ａ側が、配風流路ｕを形成するように前記凹み２１の開口２１０を覆って、前記芯パッド２の裏面２ｂに接合する。下層パッド６には、下面６ｂ側から上面６ａ側へエア導入孔６１が貫通する。下層パッド上面６ａと芯パッド裏面２ｂとの接合に伴い、エア導入孔６１が下層パッド６の下面６ｂ側から配風流路ｕと導通する。
芯パッド２と上層パッド４とは、図３,図４のごとく上層パッド４の軟質ポリウレタン発泡体が開孔２９を潜って受面２９３外の芯パッド裏面２ｂ側に露出した露出部分４３が受面２９３で受け止められたり、芯パッド２の出っ張り部上端面２８に載る上層パッド４が上端面２８を巻き込む形になったりして、両者が接合一体化される。下層パッド６と芯パッド２とは、両面テープや接着剤を介在させて両者が接合一体化される。 (2) Cushion pad The cushion pad P obtained by the above-described manufacturing method of FIGS. 1 to 7 is a vehicle provided with at least a seat surface portion 41 with which a passenger comes in contact with a soft polyurethane foam and provided with a wind distribution channel u. This is a cushion pad P including a core pad 2, an upper layer pad 4, and a lower layer pad 6.
The core pad 2 is formed of a non-breathable foam, and is provided with an air distribution channel recess 21 on the back surface 2b side. The dent 21 is the core pad back surface 2b, occupies the majority of the back surface as shown in FIG. 5, and is recessed in a dish shape in a substantially square shape from the core pad back surface 2b side to the surface 2a side. The recess 21 is provided with a plurality (four in this case) of through holes 23 penetrating from the recess bottom 211 to the surface 2a side.
The upper layer pad 4 is formed of a soft polyurethane foam, and the seat surface portion 41 is provided on the design surface 4a side (FIG. 4). The inner surface 4b side of the upper layer pad 4 is joined to the core pad surface 2a, and a plurality (four in this case) of air blowing holes 45 penetrating from the inner surface 4b side to the design surface 4a side are provided. Each air blowing hole 45 is arranged to be electrically connected to each through hole 23.
The lower layer pad 6 is formed of a non-breathable foam, and the upper surface 6a side covers the opening 210 of the recess 21 so as to form the air distribution channel u and is joined to the back surface 2b of the core pad 2. An air introduction hole 61 penetrates the lower layer pad 6 from the lower surface 6b side to the upper surface 6a side. As the lower surface pad upper surface 6a and the core pad rear surface 2b are joined, the air introduction hole 61 is electrically connected to the air distribution channel u from the lower surface 6b side of the lower layer pad 6.
As shown in FIGS. 3 and 4, the core pad 2 and the upper layer pad 4 are received by the exposed portion 43 where the soft polyurethane foam of the upper layer pad 4 is exposed to the core pad back surface 2 b side outside the receiving surface 293 through the opening 29. The upper surface pad 4 is received by the surface 293, or the upper layer pad 4 placed on the upper end surface 28 of the protruding portion of the core pad 2 is wound around the upper end surface 28. The lower layer pad 6 and the core pad 2 are joined and integrated by interposing a double-sided tape or an adhesive.

そして、芯パッド２と下層パッド６を形成する非通気性発泡体の見掛け密度が、上層パッド４の上層パッド４を形成する軟質ポリウレタン発泡体の見掛け密度よりも小さく設定されて、図４,図６,図７に示す所望のクッションパッドＰが出来上がっている。斯かるクッションパッドＰに図示しない表皮を被せれば、車両用座席の座部側シートクッションが完成する。
ここで、芯パッド２及び下層パッド６の非通気性発泡体が発泡ポリプロピレン又は発泡スチロールの成形体であると、より好適となる。軟質ポリウレタン発泡体に比し低コストで、独立気泡として且つ体積の大部分が気体である発泡ポリプロピレンや発泡スチロールの成形体は、軽量にして気密性があり、配風流路ｕから空調エアが漏れ出ないようにしなければならない芯パッド２及び下層パッド６に好都合となっている。 Then, the apparent density of the non-breathable foam forming the core pad 2 and the lower layer pad 6 is set smaller than the apparent density of the soft polyurethane foam forming the upper layer pad 4 of the upper layer pad 4, and FIG. 6. The desired cushion pad P shown in FIG. 7 is completed. If such a cushion pad P is covered with a skin (not shown), a seat cushion for the vehicle seat is completed.
Here, it is more preferable that the non-breathable foams of the core pad 2 and the lower layer pad 6 are foamed polypropylene or foamed polystyrene. Low-cost compared to flexible polyurethane foam, molded foam of polystyrene foam and polystyrene foam as closed cells and most of the volume is gas is lightweight and airtight, and air-conditioning air leaks out from the air distribution channel u This is advantageous for the core pad 2 and the lower layer pad 6 that must be eliminated.

さらに、図８〜図１２に示す他態様のクッションパッドＰでは、芯パッド２の裏面２ｂ側に、凹み２１の側壁２１２を担ってその凹底２１１よりも裏面２ｂ側へ***して、凹み２１を仕切る延在部分２５が半島状に延出形成される。図示ごとくの延在部分２５によって、芯材パッド裏面２ｂ側で、方形に窪む比較的大きな凹み２１は特開2011-110366号公報のダクトと同じような配風流路ｕを形成する凹溝へと変化し、各エア吹出孔４５への空調エアの均等分配化に延在部分２５が貢献する。延在部分２５の裏面２５ｂは平坦面に形成されている。
加えて、図８,図１１のごとく、凹み２１を囲む周縁部２２の裏面２２ｂが、芯パッド２の裏面２ｂから段差状に凹ませた一定幅の段差面２６１に形成され、且つ段差面２６１と延在部分２５の裏面２５ｂとが一様の平坦面に形成されている。 Further, in the cushion pad P according to another aspect shown in FIGS. 8 to 12, the side surface 212 of the recess 21 is carried on the back surface 2 b side of the core pad 2, and is raised to the back surface 2 b side from the recess bottom 211. An extending portion 25 for partitioning is formed in a peninsular shape. Due to the extending portion 25 as shown in the figure, a relatively large recess 21 that is recessed in a square shape on the core pad back surface 2b side becomes a recess that forms an air distribution channel u similar to the duct of Japanese Patent Application Laid-Open No. 2011-110366. The extending portion 25 contributes to the uniform distribution of the air-conditioning air to the air blowing holes 45. A back surface 25b of the extending portion 25 is formed on a flat surface.
In addition, as shown in FIGS. 8 and 11, the back surface 22 b of the peripheral edge portion 22 surrounding the recess 21 is formed as a step surface 261 having a constant width that is recessed in a step shape from the back surface 2 b of the core pad 2, and the step surface 261. And the back surface 25b of the extending portion 25 are formed on a uniform flat surface.

また、図８〜図１２のクッションパッドＰでは、芯パッド２がその表面２ａ側で水平外方に張り出す張出部２７１が配される一方、裏面２ｂ側に水平内方に引っ込む後退部２７２が配され、且つ上層パッド４が意匠面４ａ側から後退部２７２までを含めて覆っている。上層パッド４が張出部２７１を巻き込んで、芯パッド２と上層パッド４とを一体接合している。
他の構成は（１）クッションパッドの製造方法で述べた構成と同様で、その説明を省く。（１）で述べた符号と同一符号は同一又は相当部分を示す。 Further, in the cushion pad P shown in FIGS. 8 to 12, the overhanging portion 271 is arranged so that the core pad 2 projects horizontally outward on the front surface 2 a side, while the retreating portion 272 retracts horizontally inward on the back surface 2 b side. And the upper layer pad 4 covers from the design surface 4a side to the receding portion 272. The upper layer pad 4 entrains the overhang portion 271 and integrally bonds the core pad 2 and the upper layer pad 4.
Other configurations are the same as those described in (1) Cushion pad manufacturing method, and the description thereof is omitted. The same reference numerals as those described in (1) indicate the same or corresponding parts.

（３）効果
このように構成した車両用クッションパッド及びその製造方法は、芯パッド２と上層パッド４と下層パッド６とを備えて、芯パッド２と下層パッド６とが、軟質ポリウレタン発泡体の見掛け密度よりも見掛け密度が小の非通気性発泡体で形成されるので、軽量化が進む。それでいて、軟質ポリウレタン発泡体で構成された上層パッド４の意匠面４ａ側には座面部分４１が設けられているので、クッション性等の快適性は確保される。 (3) Effect The vehicle cushion pad configured as described above and the manufacturing method thereof include the core pad 2, the upper layer pad 4, and the lower layer pad 6, and the core pad 2 and the lower layer pad 6 are made of a soft polyurethane foam. Since it is formed of a non-breathable foam having an apparent density smaller than the apparent density, the weight is reduced. Nevertheless, because the seat surface portion 41 is provided on the design surface 4a side of the upper layer pad 4 made of a soft polyurethane foam, comfort such as cushioning is ensured.

そして、非通気性発泡体の下層パッド６,芯パッド２とで配風流路ｕ,透孔２３,エア導入孔６１が形成され、且つ上層パッド４の発泡成形でエア吹出孔４５が形成されるので、着座した乗員へ温度調整された空気を送り込むことができる。図示しない空調装置からエア導入孔６１へ空調エアが送り込まれると、エア導入孔６１から配風流路ｕを通って複数の各透孔２３,各エア吹出孔４５を通過して、座面４１０に着座する乗員の臀部や大腿部周りに快適な風を送り届ける。
芯パッド２の裏面２ｂ側に配風流路用凹み２１を設け、且つ該凹み２１の凹底２１１から表面２ａ側へ貫通する透孔２３を複数設けると共に、下層パッド６の上面６ａ側が配風流路ｕを形成するように凹み２１の開口２１０を覆って芯パッド裏面２ｂに接合し、さらに下層パッド下面６ｂ側から該配風流路ｕ内へ貫通するエア導入孔６１を設ける構成にすると、特許文献１のような下層が発泡スチロール等で形成されたクッションパッドにあっても、エア導入孔６１を通って座面４１０からの空気送風が可能となる。配風流路ｕ,透孔２３,エア吹出孔４５,エア導入孔６１の形成によって、温度調整された空気の送風ができる。芯パッド２,上層パッド４,下層パッド６の三分割構成にすると、クッションパッドＰの製造が比較的容易にして、該クッションパッドＰを使用した座席に着座する乗員に温度調整された空気を送風できる。
その配風流路ｕは凹み２１を設けた芯パッド２と下層パッド６との組合せ接合構成であるので、特開2011-110366号公報等で用いるダクトと違って低コスト作製でき、さらに芯パッド２付き上層パッド４の発泡成形で、凹み２１内に発泡原料ｇが浸入しても容易に除去でき、歩留まりを落とさない。 And the air distribution flow path u, the through-hole 23, and the air introduction hole 61 are formed by the lower layer pad 6 and the core pad 2 of the non-breathable foam, and the air blowing hole 45 is formed by foam molding of the upper layer pad 4. Therefore, the temperature-controlled air can be sent to the seated passenger. When the air-conditioning air is sent from the air conditioner (not shown) to the air introduction hole 61, the air introduction hole 61 passes through the air distribution flow path u, passes through the plurality of through holes 23 and the air blowing holes 45, and reaches the seat surface 410. A comfortable wind is sent around the buttocks and thighs of the seated crew.
An air distribution channel recess 21 is provided on the back surface 2b side of the core pad 2 and a plurality of through holes 23 penetrating from the recess bottom 211 of the recess 21 to the surface 2a side are provided, and the upper surface 6a side of the lower layer pad 6 is disposed on the air distribution channel. When the air introduction hole 61 that covers the opening 210 of the recess 21 so as to form u and is bonded to the core pad back surface 2b and further penetrates into the air distribution flow path u from the lower surface pad lower surface 6b side is disclosed. Even when the lower layer such as 1 is on a cushion pad formed of foamed polystyrene or the like, air can be blown from the seating surface 410 through the air introduction hole 61. By forming the air distribution flow path u, the through holes 23, the air blowing holes 45, and the air introducing holes 61, the temperature-controlled air can be blown. If the core pad 2, the upper layer pad 4, and the lower layer pad 6 are divided into three parts, the cushion pad P can be manufactured relatively easily, and the temperature-adjusted air is blown to the occupant seated in the seat using the cushion pad P. it can.
Since the air distribution flow path u is a combined joining structure of the core pad 2 provided with the recess 21 and the lower layer pad 6, unlike the duct used in Japanese Patent Application Laid-Open No. 2011-110366, etc., it can be manufactured at a low cost. In the foam molding of the attached upper layer pad 4, even if the foaming raw material g enters the recess 21, it can be easily removed and the yield is not lowered.

また、芯パッド２及び前記下層パッド６の非通気性発泡体が発泡ポリプロピレン又は発泡スチロールの成形体であると、体積の大部分が気体で占める非通気性発泡体になり、クッションパッドＰの軽量化が進み、且つ低コスト化が図れる。 Further, if the non-breathable foam of the core pad 2 and the lower layer pad 6 is a foamed polypropylene or a foamed polystyrene molded body, the bulk of the volume becomes a non-breathable foam occupied by gas, and the cushion pad P is reduced in weight. The cost can be reduced.

さらに、芯パッド２に凹み２１を仕切る延在部分２５が半島状に延出形成されると、下層パッド６の割れや損傷防止につながる。凹み２１を覆う下層パッド６が、発泡ポリプロピレンや発泡スチロールの非通気性発泡体で造られるため、略方形に窪む形の凹み２１に向けて少し大きな外力が加わると、下層パッド６が割れたり損傷したりする虞がある。凹み２１内へ半島状に突き出し形成して、該凹み２１を仕切る延在部分２５が有り且つその裏面２５ｂが平坦面であると、前記外力を延在部分２５で受け止めて分散させるので、下層パッド６の割れや損傷防止に役立つ。凹み２１内に延びる延在部分２５の裏面２５ｂが平坦面に形成されると、下層パッド６へ外力が加わった時、強度的に弱い発泡ポリプロピレンや発泡スチロールでできた下層パッド６にあっても、該平坦面の面で下層パッド６を受け止めて下層パッド６の割れや損傷を防ぐ。
さらにいえば、段差面２６１と延在部分２５の裏面２５とが一様の平坦面に形成されると、延在部分２５に加え、段差面２６１とで外力を分散して受け止めることができ、下層パッド６の割れや損傷防止に一段と有効となる。延在部分２５の裏面２５と段差面２６１の双方で、外力をより分散させて受け止めるので、下層パッド６の割れや損傷をより確実に防止できる。 Furthermore, when the extending portion 25 that partitions the recess 21 in the core pad 2 is formed in a peninsular shape, it leads to prevention of cracking and damage to the lower layer pad 6. Since the lower layer pad 6 covering the dent 21 is made of a non-breathable foamed material such as foamed polypropylene or polystyrene, the lower layer pad 6 is cracked or damaged when a slightly large external force is applied to the dent 21 having a substantially square shape. There is a risk of doing. If there is an extended portion 25 that protrudes into the recess 21 in the shape of a peninsula and partitions the recess 21 and the back surface 25b is a flat surface, the external force is received by the extended portion 25 and dispersed. Helps prevent cracking and damage to 6 If the back surface 25b of the extending portion 25 extending into the recess 21 is formed as a flat surface, when an external force is applied to the lower layer pad 6, even in the lower layer pad 6 made of foamed polypropylene or expanded polystyrene, which is weak in strength, The lower layer pad 6 is received on the flat surface to prevent the lower layer pad 6 from being cracked or damaged.
Furthermore, when the step surface 261 and the back surface 25 of the extended portion 25 are formed on a uniform flat surface, external force can be distributed and received by the step surface 261 in addition to the extended portion 25, This is even more effective in preventing cracking and damage to the lower layer pad 6. Since both the back surface 25 and the step surface 261 of the extended portion 25 receive the external force in a more dispersed manner, the lower layer pad 6 can be more reliably prevented from being cracked or damaged.

加えて、芯パッド２の透孔２３にピン９２を挿通し、下型型面８１側にピン９２の先端を当接させて芯パッド２付き上層パッド４を発泡成形することで、透孔２３に導通するエア吹出孔４５を簡単に作製できる。しかも、突き出し長が長いピン９２の存在で、脱型時に芯パッド２付き上層パッド４が上型９に付いて型が開くので、発泡型７からの芯パッド２付き上層パッド４の取出しが楽になり、作業性向上につながる。
かくのごとく、車両用クッションパッドＰ及びその製造方法は、軽量化,低コスト化を実現しながら、座面部分４１は従来通りの快適なクッション性を損なわず、且つクッションパッド内部に配風流路ｕ,エア導入孔６１,透孔２３,エア吹出孔４５等を設けて、着座する乗員に向けて温度調整された空気の送風ができるなど、普及車仕様等のクッションパッドＰに極めて有益となる。 In addition, the pin 92 is inserted into the through hole 23 of the core pad 2, the tip of the pin 92 is brought into contact with the lower mold surface 81 side, and the upper layer pad 4 with the core pad 2 is foam-molded. It is possible to easily produce the air blowing hole 45 that is electrically connected to the. In addition, because of the presence of the pin 92 having a long protruding length, the upper layer pad 4 with the core pad 2 attaches to the upper mold 9 when the mold is removed, so that the mold is opened, so that the upper layer pad 4 with the core pad 2 can be easily removed from the foaming mold 7. This leads to improved workability.
As described above, the vehicle cushion pad P and the manufacturing method thereof achieve weight reduction and cost reduction, while the seat surface portion 41 does not impair the conventional comfortable cushioning property, and the air distribution flow path inside the cushion pad. u, air introducing hole 61, through hole 23, air blowing hole 45, etc. are provided so that air temperature-adjusted toward a seated passenger can be blown, which is extremely useful for cushion pads P for popular vehicle specifications. .

尚、本発明においては前記実施形態に示すものに限られず、目的,用途に応じて本発明の範囲で種々変更できる。クッションパッドＰ,芯パッド２,凹み２１,透孔２３,延在部分２５,上層パッド４,エア吹出孔４５,下層パッド６,発泡型７等の形状,大きさ,個数,材質等は用途に合わせて適宜選択できる。 The present invention is not limited to those shown in the above-described embodiment, and various modifications can be made within the scope of the present invention depending on the purpose and application. The shape, size, number, material, etc. of cushion pad P, core pad 2, dent 21, through hole 23, extending portion 25, upper layer pad 4, air blowing hole 45, lower layer pad 6, foaming mold 7 etc. They can be selected as appropriate.

２芯パッド
２１凹み
２１１凹底
２１０凹みの開口（開口）
２１２凹みの側壁
２２凹みを囲む00周縁部（周縁部）
２５延在部分
２６段差面
４上層パッド
４１座面部分
４５エア吹出孔
６下層パッド
６１エア導入孔
８下型
８１下型型面（型面）
９上型
９２ピン
Ｐクッションパッド
ｇ軟質ポリウレタン発泡体用原料（発泡原料）
ｕ配風流路 2 core pads 21 dent 211 dent bottom 210 dent opening (opening)
212 Side wall of dent 22 00 peripheral edge (peripheral part)
25 Extending portion 26 Step surface 4 Upper layer pad 41 Seat surface portion 45 Air blowing hole 6 Lower layer pad 61 Air introducing hole 8 Lower mold 81 Lower mold surface (mold surface)
9 Upper die 92 pin P Cushion pad g Raw material for flexible polyurethane foam (foaming raw material)
u Air distribution channel

Claims

少なくとも乗員が当接する座面部分を軟質ポリウレタン発泡体で構成して、配風流路を備えた車両用クッションパッドであって、
非通気性発泡体で構成され、裏面側に配風流路用凹みが設けられ、且つ該凹みの凹底から表面側へ貫通する透孔が複数設けられた芯パッドと、
軟質ポリウレタン発泡体で構成され、意匠面側に前記座面部分が設けられ、前記意匠面側と反対の内面側は前記芯パッドの表面に接合し、さらに該内面側から前記意匠面側へ貫通するエア吹出孔が複数設けられ、且つ該エア吹出孔が前記透孔に夫々導通するように配された上層パッドと、
非通気性発泡体で構成され、上面側が、配風流路を形成するように前記凹みの開口を覆って、前記芯パッドの裏面に接合し、さらに下面側から該配風流路内へ貫通するエア導入孔が設けられた下層パッドと、を具備し、且つ前記軟質ポリウレタン発泡体の見掛け密度よりも前記非通気性発泡体の見掛け密度が小であることを特徴とする車両用クッションパッド。 A cushion pad for a vehicle comprising at least a seat surface portion with which an occupant abuts is made of a soft polyurethane foam and provided with an air distribution channel,
A core pad made of a non-breathable foam, provided with a recess for air distribution channels on the back surface side, and provided with a plurality of through holes penetrating from the bottom of the recess to the surface side;
Consists of a soft polyurethane foam, the seat surface portion is provided on the design surface side, the inner surface side opposite to the design surface side is joined to the surface of the core pad, and further penetrates from the inner surface side to the design surface side An upper layer pad provided with a plurality of air blowing holes to be disposed, and the air blowing holes arranged to be electrically connected to the through holes, respectively.
Air that is made of a non-breathable foam, has an upper surface that covers the opening of the dent so as to form an air distribution channel, is joined to the back surface of the core pad, and further penetrates into the air distribution channel from the lower surface side And a lower layer pad provided with an introduction hole, and the apparent density of the non-breathable foam is smaller than the apparent density of the soft polyurethane foam.

前記芯パッド及び前記下層パッドの非通気性発泡体が発泡ポリプロピレン又は発泡スチロールの成形体である請求項１記載の車両用クッションパッド。 The vehicle cushion pad according to claim 1, wherein the air-impermeable foam of the core pad and the lower layer pad is a molded body of foamed polypropylene or polystyrene foam.

前記芯パッドの裏面側に、前記凹みの側壁を担ってその凹底よりも裏面側へ***して、前記凹みを仕切る延在部分が半島状に延出形成され、且つ該延在部分の裏面が平坦面に形成された請求項１又は２に記載の車両用クッションパッド。 On the back surface side of the core pad, an extended portion that bears the side wall of the recess and protrudes from the bottom of the recess to the back surface side is formed extending in a peninsular shape, and the back surface of the extended portion The vehicle cushion pad according to claim 1, wherein is formed on a flat surface.

前記凹みを囲む周縁部の裏面が、前記芯パッドの裏面から段差状に凹ませた段差面に形成され、且つ該段差面と前記延在部分の裏面とが一様の平坦面に形成された請求項３記載の車両用クッションパッド。 The back surface of the peripheral portion surrounding the recess is formed in a step surface that is recessed in a step shape from the back surface of the core pad, and the step surface and the back surface of the extending portion are formed in a uniform flat surface. The vehicle cushion pad according to claim 3.

少なくとも乗員が当接する座面部分を軟質ポリウレタン発泡体で構成して、配風流路を備えた車両用クッションパッドの製造方法であって、
見掛け密度が前記軟質ポリウレタン発泡体よりも小の非通気性発泡体で構成され、裏面側に配風流路用凹みを設けて、且つ該凹みの凹底から表面側へ貫通する透孔を複数設けてなる芯パッドに係る該透孔に、発泡型の上型型面から突出する複数のピンを夫々挿通し且つ上型型面に前記芯パッドの裏面側を当接させて、該芯パッドを上型型面にセットし、
次に、下型型面上に軟質ポリウレタン発泡体用原料を注入し、
次いで、前記座面部分を形成する下型型面側に、前記ピンの先端を当接させて型閉じし、
続いて、意匠面側に座面部分を設けて、内面側を前記芯パッドの表面に接合させた軟質ポリウレタン発泡体の上層パッドを発泡成形し、
その後、脱型し、しかる後、見掛け密度が前記軟質ポリウレタン発泡体よりも小の非通気性発泡体で構成され、下面側から上面側へエア導入孔を貫通させた下層パッドの上面側で配風流路を形成するように前記凹みの開口を覆い、且つ該エア導入孔を該配風流路内へ導通させて、前記芯パッドの裏面に該下層パッドを接合させたことを特徴とする車両用クッションパッドの製造方法。 It is a method for manufacturing a cushion pad for a vehicle, comprising at least a seat surface part with which a passenger comes in contact with a soft polyurethane foam, and provided with an air distribution channel,
Consists of a non-breathable foam having an apparent density smaller than that of the soft polyurethane foam, provided with a recess for the air distribution channel on the back surface side, and provided with a plurality of through holes penetrating from the bottom of the recess to the surface side. A plurality of pins protruding from the upper mold surface of the foam mold are inserted into the through-holes of the core pad, and the back surface side of the core pad is brought into contact with the upper mold surface. Set on the upper mold surface,
Next, the raw material for the flexible polyurethane foam is injected onto the lower mold surface,
Next, the lower mold surface side forming the seat surface part is brought into contact with the tip of the pin to close the mold,
Subsequently, an upper layer pad of a soft polyurethane foam in which a seating surface portion is provided on the design surface side and the inner surface side is bonded to the surface of the core pad is foam-molded,
Thereafter, the mold is removed, and then, the apparent density is made of a non-breathable foam smaller than that of the soft polyurethane foam, and is arranged on the upper surface side of the lower layer pad that penetrates the air introduction hole from the lower surface side to the upper surface side. Covering the opening of the dent so as to form a wind passage, and connecting the lower layer pad to the back surface of the core pad by connecting the air introduction hole into the wind passage. Cushion pad manufacturing method.

前記芯パッド及び前記下層パッドの非通気性発泡体が発泡ポリプロピレン又は発泡スチロールの成形体である請求項５記載の車両用クッションパッドの製造方法。 The method for producing a cushion pad for a vehicle according to claim 5, wherein the air-impermeable foam of the core pad and the lower layer pad is a molded body of foamed polypropylene or polystyrene foam.

前記芯パッドの裏面側に、前記凹みの側壁を担ってその凹底よりも裏面側へ***させて、前記凹みを仕切る延在部分を半島状に延出形成し、且つ該延在部分の裏面が平坦面に形成され、さらに前記凹みを囲む周縁部の裏面が、前記芯パッドの裏面から段差状に凹ませた段差面に形成され、且つ該段差面と前記延在部分の裏面とが一様の平坦面に形成された請求項５又は６に記載の車両用クッションパッドの製造方法。 The back side of the core pad bears the side wall of the dent and is raised from the bottom of the dent to the back side to extend the penetrating part into a peninsular shape, and the back side of the extended part Is formed on a flat surface, and the back surface of the peripheral portion surrounding the recess is formed in a step surface recessed in a step shape from the back surface of the core pad, and the step surface and the back surface of the extension portion are the same. The method for manufacturing a vehicle cushion pad according to claim 5 or 6 formed on a flat surface.