JP2002300936A - Seat pad for vehicle and manufacturing method therefor - Google Patents
Seat pad for vehicle and manufacturing method thereforInfo
- Publication number
- JP2002300936A JP2002300936A JP2001108435A JP2001108435A JP2002300936A JP 2002300936 A JP2002300936 A JP 2002300936A JP 2001108435 A JP2001108435 A JP 2001108435A JP 2001108435 A JP2001108435 A JP 2001108435A JP 2002300936 A JP2002300936 A JP 2002300936A
- Authority
- JP
- Japan
- Prior art keywords
- density
- urethane foam
- seat pad
- hardness
- pad
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Chair Legs, Seat Parts, And Backrests (AREA)
- Mattresses And Other Support Structures For Chairs And Beds (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は乗用車等の座席に使
用される車両用シートパッドおよびその製造方法で、特
に運転席に好適な車両用シートパッドおよびその製造方
法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat pad used for a seat of a passenger car or the like and a method for manufacturing the same, and more particularly to a vehicle seat pad suitable for a driver's seat and a method for manufacturing the same.
【０００２】[0002]
【従来の技術】自動車の座席に用いられるクッション体
たるシートパッドには、図１０のような形をしており、
全体がウレタンフォームで一体成形されたものがある。
このシートパッドＳは、すべてを同一配合からなる発泡
原料で成形したものの他に、乗員の大腿部及び臀部の両
側で隆起して着座姿勢をサポートするサイドサポート部
分Ｓ１等の硬度を上げて区分けし、コーナリング走行時
等の着座姿勢をより安定保持するものがあった（特許第
２６８１３８６号等）。さらに、この異硬度シートパッ
ドを発展させて、部位別にパッド硬度を設定し乗り心地
改善等を図った多点異硬度シートパッドなどがあった
（特開２００１−７００８３，特開２０００−２５４１
７等）。乗り心地等の改善向上を企図する従来のシート
パッドは専ら硬度を変えて対応するいわゆる異硬度シー
トパッドであった。2. Description of the Related Art A seat pad serving as a cushion body used for an automobile seat has a shape as shown in FIG.
Some are integrally molded with urethane foam.
The seat pad S is divided in addition to the molded foam material made all the same formulation, by increasing the hardness of such side support portions S 1 that supports the seating posture raised by the occupant of the thigh and buttocks on both sides In some cases, the seating posture during cornering travel or the like is more stably maintained (Japanese Patent No. 2681386). Further, there is a multi-point different hardness sheet pad in which the different hardness sheet pad is developed to improve the riding comfort by setting the pad hardness for each region (Japanese Patent Application Laid-Open Nos. 2001-70083, 2000-2541).
7 etc.). Conventional seat pads intended to improve ride comfort and the like are so-called different hardness seat pads that are exclusively used by changing hardness.
【０００３】[0003]
【発明が解決しようとする課題】しかるに、異硬度シー
トパッドにおいて、その硬度と密度の関係はほぼ直線に
近い正比例関係にあり、密度を一定にして硬度だけを変
化させるのは難しかった。シートパッドの必要箇所の硬
度を上げて乗り心地等の向上を目指した場合、硬度を上
げた箇所はその分パッド密度が大きくなっていた。そし
て密度が大きくなった分だけ重量アップし、軽量化が推
し進められている自動車環境にあって不利になってい
た。一方、運転席などの座席は底付き感があってはなら
ず、シートパッド全体に高密度のものを使う傾向にあっ
た。しかし、高密度のものを使えば重量アップになり、
またウレタン材料を多く使用することになってコストが
嵩んでいた。これに対し、本発明者等は鋭意研究を重
ね、臀部を受け支える後座部分だけに他部分の箇所より
高密度のものを使うことで底付き感を解消でき、座り心
地さらに乗り心地にも好影響を及ぼすのを見出すに至っ
た。However, in a sheet pad having a different hardness, the relationship between the hardness and the density is in a direct proportional relationship that is almost linear, and it is difficult to change only the hardness while keeping the density constant. When the hardness of the required portion of the seat pad is increased to improve the riding comfort and the like, the pad density is increased at the increased hardness portion. In addition, the weight has increased due to the increased density, which has been disadvantageous in the automotive environment where weight reduction is being promoted. On the other hand, seats such as a driver's seat should not have a feeling of bottoming, and there was a tendency to use high-density seat pads as a whole. However, if you use a high density one, the weight will increase,
In addition, the use of a large amount of urethane material has increased the cost. On the other hand, the present inventors have conducted intensive research, and can eliminate the feeling of bottoming by using a high-density material only in the rear seat portion that supports the buttocks than in the other portion, so that the sitting comfort and the riding comfort are also improved. Has come to find a positive effect.
【０００４】本発明は従来の問題点を解決するもので、
座り心地，乗り心地を良くし、しかも軽量化，低コスト
化をも達成し得る車両用シートパッドおよびその製造方
法を提供することを目的とする。[0004] The present invention solves the conventional problems.
It is an object of the present invention to provide a vehicle seat pad capable of improving sitting comfort and riding comfort and achieving weight reduction and cost reduction, and a method of manufacturing the same.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成すべく、
請求項１に記載の発明の要旨は、全体が一体成形された
車両用シートパッドであって、乗員の大腿部を受け支え
る前座部分の後方に位置し、臀部を受け支える後座部分
が他のいずれの部分よりも高密度の発泡体で形成される
ようにしたことを特徴とする車両用シートパッドにあ
る。請求項２に記載の発明の要旨は、ウレタンフォーム
で全体が一体成形された車両用シートパッドであって、
乗員の大腿部を受け支える前座部分と、臀部を受け支え
る後座部分と、大腿部及び臀部の両側で隆起して着座姿
勢をサポートするサイドサポート部分と、に少なくとも
区分けされ、且つ、各部分のウレタンフォームの硬度を
任意に設定しながら、前記後座部分を形成するウレタン
フォームの密度を他部分のものより大きく設定してなる
ことを特徴とする車両用シートパッドにある。請求項３
に記載の発明の要旨は、ウレタンフォームで全体が一体
成形される車両用シートパッドの製造方法において、乗
員の大腿部を受け支える前座部分と、臀部を受け支える
後座部分と、大腿部及び臀部の両側で隆起して着座姿勢
をサポートするサイドサポート部分と、に車両用シート
パッドを少なくとも区分化できる発泡成形型の各区分室
に、ポリマーポリオール又は／及び発泡剤の配合比率を
夫々コントロールしたウレタン発泡原料を注入し、その
後、型閉じし発泡成形することにより前記各部分を形成
するウレタンフォームの硬度と密度の両数値を独自に選
定できるようにしたことを特徴とする車両用シートパッ
ドの製造方法にある。In order to achieve the above object,
The gist of the invention according to claim 1 is a vehicle seat pad which is integrally formed as a whole, and is located behind a front seat portion for supporting a thigh of an occupant, and a rear seat portion for supporting a buttocks is another. The vehicle seat pad is characterized in that it is formed of a foam having a higher density than any part of the vehicle seat pad. The gist of the invention according to claim 2 is a vehicle seat pad which is integrally formed of urethane foam,
A front seat portion that supports the thigh of the occupant, a rear seat portion that supports the buttocks, and a side support portion that supports the sitting posture by being raised on both sides of the thighs and the buttocks; The seat pad for a vehicle is characterized in that, while arbitrarily setting the hardness of the urethane foam, the density of the urethane foam forming the rear seat portion is set higher than that of the other portions. Claim 3
SUMMARY OF THE INVENTION The gist of the invention described in the above is a method of manufacturing a vehicle seat pad which is integrally formed of urethane foam, wherein a front seat portion for supporting a thigh of an occupant, a rear seat portion for supporting a buttock, The mixing ratio of the polymer polyol or / and the foaming agent was controlled in each compartment of a foaming mold capable of at least compartmentalizing a vehicle seat pad into a side support portion that supports a seating posture by being raised on both sides of the buttocks. By injecting a urethane foam raw material, and thereafter, by closing the mold and foam molding, it is possible to independently select both numerical values of the hardness and the density of the urethane foam forming each part, wherein the seat pad for a vehicle is characterized in that In the manufacturing method.
【０００６】請求項１〜３の発明のごとく、後座部分が
他のいずれの部分よりも高密度の発泡体で形成されるよ
うにすると、高密度構成によってこの部分がヘタリの少
ない高耐久パッドとなる。乗員の体重が最も加わる場所
が後座部分であることから、ここに高密度の発泡体が配
されると、底付き感をなくし、座り心地，乗り心地等を
効果的に高めるようになる。請求項２，３の発明のごと
く、ウレタンフォームの硬度と密度の両数値を独自に選
定できるようになると、それぞれの特性を十分発揮でき
るようになるので、乗り心地等の快適性だけでなく、軽
量化，低コスト化などの様々な要求に対応可能になる。According to the first to third aspects of the present invention, when the rear seat portion is formed of a foam having a higher density than any other portion, the high-durability pad has a reduced settled portion due to the high-density structure. Becomes Since the place where the weight of the occupant is added most is the rear seat portion, if a high-density foam is disposed here, the feeling of bottoming is eliminated, and the sitting comfort, riding comfort and the like are effectively enhanced. As in the inventions of claims 2 and 3, when it is possible to independently select both the values of the hardness and the density of the urethane foam, the characteristics of each can be sufficiently exhibited. Various requirements such as weight reduction and cost reduction can be met.
【０００７】[0007]
【発明の実施の形態】以下、本発明の車両用シートパッ
ドおよびその製造方法について詳述する。図１〜図９
は、本発明に係る車両用シートパッド（以下、単に「シ
ートパッド」という。）およびその製造方法の一形態
で、図１はその発泡成形型の斜視図、図２は図１の下型
キャビティの平面図、図３は型内へ発泡原料を注入して
いる説明断面図、図４は型閉じし、発泡成形を終えた状
態を示す説明断面図、図５は脱型しトリミングを終えた
シートパッドの斜視図、図６は図５のＡ-Ａ線矢視図、
図７は図５のＢ-Ｂ線矢視図、図８，図９はシートパッ
ド密度の応力緩和への影響図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a vehicle seat pad according to the present invention and a method for manufacturing the same will be described in detail. 1 to 9
1 is an embodiment of a vehicle seat pad according to the present invention (hereinafter simply referred to as “seat pad”) and a method of manufacturing the same. FIG. 1 is a perspective view of the foam mold, and FIG. 2 is a lower mold cavity of FIG. , FIG. 3 is an explanatory cross-sectional view in which a foaming material is injected into the mold, FIG. 4 is an explanatory cross-sectional view showing a state in which the mold is closed and foam molding is completed, and FIG. 5 is demolded and trimmed. FIG. 6 is a perspective view of the seat pad, FIG.
FIG. 7 is a view taken along the line BB of FIG. 5, and FIGS. 8 and 9 are views showing the influence of sheet pad density on stress relaxation.
【０００８】（１）シートパッドの製造方法 本発明のシートパッドの製造に先立ち、これに用いる発
泡成形型２について説明する。発泡成形型２は図１のよ
うな下型２ａと上型２ｂとを備え、型閉じによりシート
パッド１に対応したキャビティ２０を形成する。下型２
ａのキャビティ２０が碗状窪みになっており、このキャ
ビティ面がシートパッド１の上面及び側周面を形成し、
上型２ｂのキャビティ面はシートパッド１の下面を形成
する。下型２ａのキャビティ下面には突条に隆起する横
断堰２１と縦断堰２２がＨ字状に設けられて、これらの
堰によって前座部分室２０ａと後座部分室２０ｂとサイ
ドサポート部分室２０ｃとに区分けされている。縦断堰
２２がシートパッド１からサイドサポート部分１ｃを両
脇に分ける境界部になり、横断堰２１がシートパッド１
残り分を前座部分室２０ａと後座部分室２０ｂにほぼ二
等分に分ける境界部になっている（図２，図５）。キャ
ビティ２０にウレタン発泡原料４を注入してシートパッ
ド１が成形されると、前座部分室２０ａにより乗員の大
腿部を受け支える前座部分１ａが造られる。また、後座
部分室２０ｂにより臀部を受け支える後座部分１ｂが造
られ、サイドサポート部分室２０ｃにより大腿部及び臀
部の両側で隆起して着座姿勢をサポートするサイドサポ
ート部分１ｃが造られる。シートパッド１は全体が一体
成形される。下型２ａのサイドサポート部分室２０ｃの
下面は前座部分室２０ａや後座部分室２０ｂの下面より
下方に凹んでおり、着座した乗員の大腿部及び臀部の両
側で隆起するサイドサポート部分１ｃが得られるように
なっている。(1) Manufacturing method of seat pad Prior to manufacturing the seat pad of the present invention, the foaming mold 2 used for this will be described. The foaming mold 2 includes a lower mold 2a and an upper mold 2b as shown in FIG. 1, and forms a cavity 20 corresponding to the seat pad 1 by closing the mold. Lower mold 2
a of the cavity 20 is a bowl-shaped depression, and the cavity surface forms the upper surface and the side peripheral surface of the seat pad 1;
The cavity surface of the upper mold 2b forms the lower surface of the seat pad 1. On the lower surface of the cavity of the lower die 2a, a transverse weir 21 and a longitudinal weir 22 protruding from the ridge are provided in an H shape, and these weirs form a front seat partial chamber 20a, a rear seat partial chamber 20b, and a side support partial chamber 20c. It is divided. The vertical weir 22 is a boundary part that divides the side support portion 1c from the seat pad 1 on both sides.
The remaining portion is a boundary part which is roughly divided into two parts, a front seat partial chamber 20a and a rear seat partial chamber 20b (FIGS. 2 and 5). When the urethane foaming raw material 4 is injected into the cavity 20 to form the seat pad 1, the front seat portion 1a for supporting the occupant's thigh by the front seat portion chamber 20a is formed. Further, the rear seat portion 1b that supports the buttocks is formed by the rear seat portion chamber 20b, and the side support portions 1c that support the sitting posture by being raised on both sides of the thigh and the buttocks are formed by the side support portion chamber 20c. The entire seat pad 1 is integrally formed. The lower surface of the side support partial chamber 20c of the lower mold 2a is recessed below the lower surfaces of the front seat partial chamber 20a and the rear seat partial chamber 20b, and the side support portions 1c protruding on both sides of the thigh and buttocks of the seated occupant are obtained. It has become.
【０００９】シートパッド１の製造は、まず前記発泡成
形型２を型開状態にして（図１）、下型２ａの前座部分
室２０ａ，後座部分室２０ｂ等の各区分室に所望の硬度
と密度が得られるよう、ウレタン発泡原料４中のポリマ
ーポリオールや発泡剤の配合比率を夫々コントロールし
ながら該発泡原料４を注入する。各区分室に注入される
発泡原料４が混ざり合うのを、縦断堰２２，横断堰２１
が阻止する。ここで、後座部分室２０ｂに注入する発泡
原料４は他の部分よりも密度が大きな発泡体が得られる
ようにする。硬度はユーザの要望に応えて任意に選ぶこ
とができる。一例として、表１に示す密度は、後座部分
１ｂに高密度ウレタンフォーム（例えば５２ｋｇ／
ｍ３）を、その他の部分に低密度ウレタンフォーム（例
えば４５ｋｇ／ｍ３）を採用する。硬度は一律に同じ硬
さ（例えば２３０Ｎ）を採用したシートパッド１とす
る。本実施形態もこれを採用する。後座部分１ｂに高密
度ウレタンフォームを、その他の部分に低密度ウレタン
フォームを採用し、硬度についてはサイドサポート部分
１ｃの硬度を他の部分より高く設定したシートパッド１
等としてもよい。To manufacture the seat pad 1, the foam molding die 2 is first opened (FIG. 1), and the desired hardness is set in each of the compartments such as the front seat chamber 20a and the rear seat chamber 20b of the lower mold 2a. The foaming raw material 4 is injected while controlling the mixing ratio of the polymer polyol and the foaming agent in the urethane foaming raw material 4 so as to obtain high density. The mixing of the foaming raw material 4 injected into each compartment is performed by the longitudinal weir 22 and the crossing weir 21.
Will block. Here, the foaming raw material 4 to be injected into the rear seat portion chamber 20b is made to obtain a foam having a higher density than other portions. The hardness can be arbitrarily selected according to the user's request. As an example, the density shown in Table 1 indicates that the high density urethane foam (for example, 52 kg /
m 3 ), and a low-density urethane foam (for example, 45 kg / m 3 ) is used for other portions. The seat pad 1 adopts the same hardness (e.g., 230 N). This embodiment also employs this. Seat pad 1 in which high-density urethane foam is used for rear seat portion 1b and low-density urethane foam is used for other portions, and hardness of side support portion 1c is set higher than other portions.
And so on.
【００１０】[0010]
【表１】 [Table 1]
【００１１】上述のごとく、ウレタンフォームの硬度と
密度の両数値を独自に選定できるようにするため、各室
毎に注入される発泡原料４中のポリマーポリオールの配
合割合及び／又は発泡剤の配合割合が調整される。具体
的には表２のごとくになる。ウレタンフォームの硬度を
ほぼ一定にして密度を大きくしようと思えば発泡原料４
中の発泡剤の配合比率を下げる。逆に、ウレタンフォー
ムの硬度をほぼ一定にして密度を小さくしようとするな
ら発泡剤の配合比率を上げる。一方、ウレタンフォーム
の密度をほぼ一定にして硬度を上げようと思えば発泡原
料４中のポリマーポリオールの配合比率を上げる。逆
に、ウレタンフォームの密度をほぼ一定にして硬度を下
げようとするならポリマーポリオールの配合比率を下げ
ていく。本実施形態における発泡剤には水が用いられて
いる。As described above, in order to be able to independently select both the hardness and the density of the urethane foam, the blending ratio of the polymer polyol in the foaming raw material 4 injected into each chamber and / or the blending of the foaming agent. The percentage is adjusted. Specifically, it is as shown in Table 2. If you want to increase the density while keeping the hardness of the urethane foam almost constant, foam raw material 4
Decrease the blending ratio of the foaming agent inside. Conversely, if the density of the urethane foam is to be reduced while keeping the hardness of the urethane foam substantially constant, the mixing ratio of the foaming agent is increased. On the other hand, if it is desired to increase the hardness by keeping the density of the urethane foam substantially constant, the mixing ratio of the polymer polyol in the foaming raw material 4 is increased. Conversely, if the hardness of the urethane foam is to be reduced while keeping the density substantially constant, the blending ratio of the polymer polyol is reduced. Water is used as the foaming agent in the present embodiment.
【００１２】[0012]
【表２】 [Table 2]
【００１３】下型２ａの前座部分室２０ａに４５ｋｇ／
ｍ３の低密度で所定硬度（２３０Ｎ）のウレタンフォー
ムになる低密度配合原料４１を注入ノズル３から注入
し、続いて、同じ発泡原料４をサイドサポート部分室２
０ｃにも注入する。その後、図３の後座部分室２０ｂの
上方（鎖線位置）へ注入ノズル３をずらし、硬度を２３
０Ｎとそのままにしながら５２ｋｇ／ｍ３の高密度のウ
レタンフォームになる高密度配合原料４２を注入ノズル
３から注入する。ここでは、注入機内でウレタンフォー
ムの硬度と密度の両数値が所定値になるよう調整切替し
て、一つの注入ノズル３を使って各部分に対応する発泡
原料４を順次注入していく。密度と硬度の様々な組合せ
をもったウレタンフォームを一つの注入設備で行うこと
ができるので、多品種，多仕様のシートパッド１に低コ
ストで対応できる。勿論、ポリマーポリオールと発泡剤
の量をコントロールした複数の注入ノズル３を使用し
て、各区分室に所定の発泡原料４を注入する方法を採っ
てもよい。[0015] 45 kg /
A low-density compounding raw material 41 to be urethane foam having a low density of m 3 and a predetermined hardness (230 N) is injected from the injection nozzle 3, and then the same foaming raw material 4 is injected into the side support partial chamber 2.
Inject also into 0c. Thereafter, the injection nozzle 3 is shifted above the rear seat portion chamber 20b (the position of the dashed line) in FIG.
The high-density compounding raw material 42 which becomes a high-density urethane foam of 52 kg / m 3 is injected from the injection nozzle 3 while keeping the pressure at 0N. Here, the foaming raw material 4 corresponding to each portion is sequentially injected using one injection nozzle 3 by switching the adjustment so that both the numerical values of the hardness and the density of the urethane foam become predetermined values in the injection machine. Since urethane foam having various combinations of density and hardness can be performed by one injection facility, it is possible to cope with a wide variety of multi-specification seat pads 1 at low cost. Of course, a method of injecting a predetermined foaming raw material 4 into each compartment using a plurality of injection nozzles 3 in which the amounts of the polymer polyol and the foaming agent are controlled may be adopted.
【００１４】発泡成形型２（下型２ａ）の各区分室に、
夫々ポリマーポリオールと発泡剤の配合量をコントロー
ルしたウレタン発泡原料４を注入を終えたら、次に、上
型２ｂを被せ型閉じする。その後、キャビティ２０内で
発泡成形する。図４のように前座部分１ａ，後座部分１
ｂ等の硬度と密度の両数値がそれぞれ独自選定されたの
ウレタンフォームが一体成形されていく。発泡成形を終
え、硬化工程を経て脱型する。本実施形態では、図５〜
図７のように各部分のウレタンフォームの硬度をほぼ一
定に保って、後座部分１ｂを形成するウレタンフォーム
の密度を他部分のものより大きくした異密度シートパッ
ド１が出来上がっている。In each of the compartments of the foaming mold 2 (lower mold 2a),
After the injection of the urethane foaming raw material 4 in which the mixing amounts of the polymer polyol and the foaming agent are controlled, the upper mold 2b is covered and the mold is closed. Thereafter, foam molding is performed in the cavity 20. As shown in FIG. 4, the front seat portion 1a and the rear seat portion 1
The urethane foam whose hardness and density values such as b are individually selected is integrally formed. After the foam molding, the mold is released through the curing process. In the present embodiment, FIGS.
As shown in FIG. 7, a different density sheet pad 1 is obtained in which the hardness of the urethane foam of each part is kept substantially constant and the density of the urethane foam forming the rear seat part 1b is higher than that of the other parts.
【００１５】（２）シートパッド１ 例えば既述のような製法で得られたシートパッド１は、
全体が一体成形された車両用シートパッド１であって、
乗員の大腿部を受け支える前座部分１ａの後方に位置
し、臀部を受け支える後座部分１ｂが他のいずれの部分
よりも高密度の発泡体で形成されたものとなる。より詳
しくは、発泡体がウレタンフォームであり、該シートパ
ッド１は乗員の大腿部を受け支える前座部分１ａと、臀
部を受け支える後座部分１ｂと、大腿部及び臀部の両側
で隆起して着座姿勢をサポートするサイドサポート部分
１ｃと、に少なくとも区分けされ、且つ、各部分のウレ
タンフォームの硬度を任意に設定しながら、前記後座部
分１ｂを形成するウレタンフォームの密度を他部分のも
のより大きく設定した異密度シートパッド１となってい
る。(2) Seat pad 1 For example, the seat pad 1 obtained by the above-described manufacturing method is
A vehicle seat pad 1 integrally formed as a whole,
The rear seat portion 1b, which is located behind the front seat portion 1a that supports the thigh of the occupant and supports the buttocks, is formed of a foam having a higher density than any other portion. More specifically, the foam is urethane foam, and the seat pad 1 has a front seat portion 1a for supporting the thigh of the occupant, a rear seat portion 1b for supporting the buttocks, and bulges on both sides of the thigh and the buttocks. And a side support portion 1c that supports the seating posture, and while the hardness of the urethane foam of each portion is arbitrarily set, the density of the urethane foam forming the rear seat portion 1b is higher than that of the other portions. The seat pad 1 has a different density and is set to be large.
【００１６】シートパッド１の各部分の硬度，密度を任
意に設定するには、発泡原料４のポリマーポリオールと
発泡剤の組成比率を調整することになる。硬度，密度に
変化を与える発泡原料４の主成分組成の一例を表３に示
す。表３の各数値は重量部で表す。In order to arbitrarily set the hardness and density of each portion of the seat pad 1, the composition ratio of the polymer polyol of the foaming raw material 4 and the foaming agent is adjusted. Table 3 shows an example of the main component composition of the foaming raw material 4 that changes the hardness and the density. Each numerical value in Table 3 is expressed in parts by weight.
【００１７】[0017]
【表３】 [Table 3]
【００１８】本発明者等はシートパッド１を形成するウ
レタンフォームの後座部分１ｂの密度を上げることが底
付きをなくし、座り心地等の向上に威力を発揮すること
をつき止めた。図８，図９がこれを裏付けた格好になっ
ている。図８，図９は密度の応力緩和への影響を調べた
実験データである。図８ではシートパッド１の密度ρが
３５ｋｇ／ｍ３，４５ｋｇ／ｍ３，５５ｋｇ／ｍ３，６
５ｋｇ／ｍ３である各試験品に初期荷重２００Ｎを加
え、経過時間ｖｓ荷重を求めた。各シートパッド試験品
の硬度は一定で、２３０Ｎ／３１４ｃｍ２の同一硬度品
を用いている。図９は同一硬度にあっても、密度の増加
に伴い応力緩和が減少し、底付きがなく、ヘタリの少な
い高耐久パッドが得られることを示している。The inventors of the present invention have found that increasing the density of the rear seat portion 1b of the urethane foam forming the seat pad 1 eliminates bottoming and exerts a powerful effect on improvement of sitting comfort. FIG. 8 and FIG. 9 show the appearance supporting this. 8 and 9 are experimental data for examining the effect of density on stress relaxation. In FIG. 8, the density ρ of the seat pad 1 is 35 kg / m 3 , 45 kg / m 3 , 55 kg / m 3 , 6
An initial load of 200 N was applied to each test specimen of 5 kg / m 3 to determine the elapsed time vs. load. The hardness of each seat pad test product is constant, and the same hardness product of 230 N / 314 cm 2 is used. FIG. 9 shows that even if the hardness is the same, the stress relaxation decreases as the density increases, and a highly durable pad with no bottom and little settling can be obtained.
【００１９】本実施形態のシートパッド１は、硬度をど
の部分も２３０Ｎとほぼ一定に保って、後座部分１ｂの
密度（５２ｋｇ／ｍ３）を前座部分１ａ及びサイドサポ
ート部分１ｃの密度（４５ｋｇ／ｍ３）より大きな値と
する。ここでは、表３のケース１に示す組成の発泡原料
４を後座部分１ｂに採用し、表３のケース３に示す組成
の発泡原料４を前座部分１ａ及びサイドサポート部分１
ｃに採用する。硬度はユーザの要求硬度に応える値を採
用し、該硬度に影響されることなく密度を制御すること
になる。シートパッド１の対応可能な硬度は８０Ｎ〜４
００Ｎの範囲であるIn the seat pad 1 of the present embodiment, the hardness of each portion is kept almost constant at 230 N, and the density of the rear seat portion 1 b (52 kg / m 3 ) is set to 45 kg / m 3 (45 kg / m 3 ) of the front seat portion 1 a and the side support portion 1 c. m 3 ). Here, the foaming raw material 4 having the composition shown in Case 1 in Table 3 is adopted for the rear seat portion 1b, and the foaming raw material 4 having the composition shown in Case 3 in Table 3 is used for the front seat portion 1a and the side support portion 1b.
c. As the hardness, a value corresponding to the hardness required by the user is adopted, and the density is controlled without being affected by the hardness. The corresponding hardness of the seat pad 1 is 80 N to 4
00N range
【００２０】なお、本発明で示す硬度測定値はＪＡＳＯ
Ｂ４０８−８４（自動車用シートパッド１材の性能試
験方法）に準じた測定法による。ＪＡＳＯ Ｂ４０８−
８４では、「硬さ試験は次により行うとして、（１）加
圧板は５．３に示す円板形を用いる。（２）試験機の水
平台上に試験片を置き、試験機に取り付けた加圧板を試
験片の上面の中心に載せる。（３）試験片に５Ｎの初荷
重を加えて厚さを測定し、これを初期厚さとする。
（４）フォーム類は予備圧縮として、加圧板を原則とし
て５０mm／minの速度で、初期厚さの７５％の距離まで
圧縮したのち、直ちに荷重を除く。３〜５分間放置後初
期厚さの２５％の距離まで圧縮し、そのままの状態で２
０秒間静止させたのち荷重を測定する。これを２５％硬
さとする。」としている。本実施形態の硬度は、前記
「３〜５分間放置後」に代え、直後または１分後とした
２５％硬さとする。また、本実施形態の試験環境条件は
室温２３℃、湿度５０％である。Incidentally, the hardness measured value shown in the present invention is JASO
The measurement method is based on B408-84 (a method for testing the performance of one sheet pad for an automobile). JASO B408-
In 84, it is assumed that “the hardness test is performed as follows, and (1) the pressure plate has a disk shape shown in 5.3. (2) The test piece is placed on a horizontal table of the test machine and attached to the test machine. The pressing plate is placed on the center of the upper surface of the test piece (3) The initial load of 5N is applied to the test piece, the thickness is measured, and this is defined as the initial thickness.
(4) As a pre-compression, the foam is compressed to a distance of 75% of the initial thickness at a speed of 50 mm / min as a rule, and then the load is immediately removed. After leaving it for 3 to 5 minutes, compress it to a distance of 25% of the initial thickness.
After resting for 0 seconds, the load is measured. This is 25% hardness. " The hardness of the present embodiment is 25% hardness immediately or after 1 minute instead of the above “after leaving for 3 to 5 minutes”. The test environment conditions of the present embodiment are room temperature 23 ° C. and humidity 50%.
【００２１】前記縦断堰２２により縦断溝１２が形成さ
れ、前記横断堰２１により横断溝１１が形成される。該
縦断溝１２によってシートパッド１の両脇にサイドサポ
ート部分１ｃが区分けされている。横断溝１１によって
残りのシートパッド１部分が前座部分１ａと後座部分１
ｂに区分けされている。これら縦断溝１２，横断溝１１
は後工程でシートパッド１に貼着される表皮を引張固定
するための溝として使用される。The longitudinal weir 22 forms the longitudinal groove 12, and the transverse weir 21 forms the transverse groove 11. The side support portions 1 c are divided on both sides of the seat pad 1 by the longitudinal grooves 12. The remaining seat pad 1 is divided into the front seat portion 1a and the rear seat portion 1 by the transverse groove 11.
b. These longitudinal grooves 12 and transverse grooves 11
Is used as a groove for tension-fixing the skin attached to the seat pad 1 in a later step.
【００２２】（３）効果 このように構成されたシートパッド１およびその製造方
法によれば、シートパッド１の硬度と密度を双方独立し
て設定できるので、ユーザ要求に応える硬度を採用しな
がら、後座部分１ｂのウレタンフォームの密度のみを高
密度に設定できる。後座部分１ｂだけに高密度のものを
使うことで、硬度調整だけでは困難な底付き感を難なく
解消し、座り心地，乗り心地を効果的に改善できる。さ
らに、密度を大きくする箇所を必要な後座部分１ｂの最
小限にとどめて、他の箇所の密度を小さくできるので、
シートパッド１の軽量化を実現できる。硬度と関係して
不必要に密度を上げることもないので、低コスト化も図
ることができる。ポリマーポリオール並びに発泡剤の配
合比率を調整，組合せにより、シートパッド１を形成す
るウレタンフォームの硬さと密度をそれぞれ個別に変え
られるので、様々な特性を有したものを簡単に作製でき
る。(3) Effects According to the seat pad 1 and the method of manufacturing the same, the hardness and the density of the seat pad 1 can be set independently of each other. Only the urethane foam density of the rear seat portion 1b can be set to a high density. By using a high-density one only for the rear seat portion 1b, the feeling of bottoming, which is difficult only by adjusting the hardness, can be easily eliminated, and the sitting comfort and riding comfort can be effectively improved. Furthermore, since the portion where the density is increased is minimized to the necessary rear seat portion 1b and the density of the other portions can be reduced,
The weight reduction of the seat pad 1 can be realized. Since the density is not unnecessarily increased in relation to the hardness, the cost can be reduced. By adjusting and combining the mixing ratio of the polymer polyol and the foaming agent, the hardness and density of the urethane foam forming the seat pad 1 can be individually changed, so that products having various characteristics can be easily produced.
【００２３】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。シートパッド１，前座部分１ａ，後座
部分１ｂ，サイドサポート部分１ｃ，発泡原料４等の形
状，大きさ，個数，組成等は用途に合わせて適宜選択で
きる。例えば、実施形態ではシートパッド１を４区分に
分割したがそれよりもっと多い区分に分割して硬度，密
度をそれぞれ変化させるシートパッド１であってもよ
い。It should be noted that the present invention is not limited to the embodiment described above, but can be variously modified within the scope of the present invention depending on the purpose and application. The shape, size, number, composition, etc. of the seat pad 1, the front seat portion 1a, the rear seat portion 1b, the side support portion 1c, the foaming material 4, and the like can be appropriately selected according to the application. For example, in the embodiment, the seat pad 1 is divided into four sections. However, the seat pad 1 may be divided into more sections and the hardness and the density may be respectively changed.
【００２４】[0024]
【発明の効果】以上のごとく、本発明の車両用シートパ
ッドおよびその製造方法は、底付き感がなく、座り心
地，乗り心地が良好にして軽量化，低コスト化をも達成
することができ、優れた効果を発揮する。As described above, the vehicle seat pad and the method of manufacturing the same according to the present invention do not have a feeling of bottoming, can achieve good sitting comfort and riding comfort, and can achieve weight reduction and cost reduction. Demonstrates excellent effects.
【図１】発明に係る車両用シートパッドおよびその製造
方法の一形態で、それに用いる発泡成形型の斜視図であ
る。FIG. 1 is a perspective view of a foam molding die used in a vehicle seat pad and a method of manufacturing the same according to an embodiment of the present invention.
【図２】図１の下型キャビティの平面図である。FIG. 2 is a plan view of a lower cavity of FIG. 1;
【図３】型内へ発泡原料を注入している説明断面図であ
る。FIG. 3 is an explanatory sectional view in which a foaming material is injected into a mold.
【図４】型閉じし、発泡成形を終えた状態を示す説明断
面図である。FIG. 4 is an explanatory sectional view showing a state where a mold is closed and foam molding is completed.
【図５】脱型しトリミングを終えたシートパッドの斜視
図である。FIG. 5 is a perspective view of the seat pad after the mold is removed and trimmed.
【図６】図５のＡ-Ａ線矢視図である。FIG. 6 is a view taken along line AA of FIG. 5;
【図７】図５のＢ-Ｂ線矢視図である。FIG. 7 is a view taken along the line BB of FIG. 5;
【図８】シートパッド密度の応力緩和への影響図であ
る。FIG. 8 is a diagram showing the influence of sheet pad density on stress relaxation.
【図９】シートパッド密度の応力緩和への影響図であ
る。FIG. 9 is a diagram illustrating the influence of sheet pad density on stress relaxation.
【図１０】従来技術の説明斜視図である。FIG. 10 is an explanatory perspective view of a conventional technique.
１ シートパッド １ａ 前座部分 １ｂ 後座部分 １ｃ サイドサポート部分 ２ 発泡成形型 ２０ａ 前座部分室（区分室） ２０ｂ 後座部分室（区分室） ２０ｃ サイドサポート部分室（区分室） ４ 発泡原料 ４１ 低密度配合原料（発泡原料） ４２ 高密度配合原料（発泡原料） DESCRIPTION OF SYMBOLS 1 Seat pad 1a Front seat part 1b Rear seat part 1c Side support part 2 Foaming mold 20a Front seat part room (compartment room) 20b Rear seat part room (separation room) 20c Side support part room (separation room) 4 Foaming material 41 Low density compounding material (Foaming material) 42 High-density compounding material (Foaming material)
フロントページの続き (72)発明者 今井 景太 愛知県安城市今池町三丁目１番36号 株式 会社アイ・ダブリュー・フォームコーポレ ーション内 (72)発明者 杉山 裕隆 愛知県安城市今池町三丁目１番36号 株式 会社アイ・ダブリュー・フォームコーポレ ーション内 Ｆターム(参考） 3B084 CA04 CB01 3B096 AB07 Continuing on the front page (72) Inventor Keita Imai 3-36 Imaikecho, Anjo-shi, Aichi Prefecture Inside I-WoW Form Corporation (72) Inventor Hirotaka Sugiyama 3-chome Imaikecho, Anjo-shi, Aichi Prefecture No. 36 F-term (reference) in IW Form Co., Ltd. 3B084 CA04 CB01 3B096 AB07
Claims (3)
ドであって、乗員の大腿部を受け支える前座部分の後方
に位置し、臀部を受け支える後座部分が他のいずれの部
分よりも高密度の発泡体で形成されるようにしたことを
特徴とする車両用シートパッド。1. A vehicle seat pad which is integrally formed as a whole, and is located behind a front seat portion for supporting a thigh of an occupant, and a rear seat portion for supporting a buttocks is more than any other portion. A vehicle seat pad formed of a high-density foam.
た車両用シートパッドであって、乗員の大腿部を受け支
える前座部分と、臀部を受け支える後座部分と、大腿部
及び臀部の両側で隆起して着座姿勢をサポートするサイ
ドサポート部分と、に少なくとも区分けされ、且つ、各
部分のウレタンフォームの硬度を任意に設定しながら、
前記後座部分を形成するウレタンフォームの密度を他部
分のものより大きく設定してなることを特徴とする車両
用シートパッド。2. A vehicle seat pad integrally formed of urethane foam, comprising: a front seat portion for receiving a thigh of an occupant; a rear seat portion for receiving a buttocks; and both sides of the thigh and the buttocks. And at least divided into side support portions that support the sitting posture by protruding, and while arbitrarily setting the hardness of the urethane foam of each portion,
A seat pad for a vehicle, wherein the density of urethane foam forming the rear seat portion is set higher than that of other portions.
る車両用シートパッドの製造方法において、乗員の大腿
部を受け支える前座部分と、臀部を受け支える後座部分
と、大腿部及び臀部の両側で隆起して着座姿勢をサポー
トするサイドサポート部分と、に車両用シートパッドを
少なくとも区分化できる発泡成形型の各区分室に、ポリ
マーポリオール又は／及び発泡剤の配合比率を夫々コン
トロールしたウレタン発泡原料を注入し、その後、型閉
じし発泡成形することにより前記各部分を形成するウレ
タンフォームの硬度と密度の両数値を独自に選定できる
ようにしたことを特徴とする車両用シートパッドの製造
方法。3. A method for manufacturing a vehicle seat pad which is integrally formed of urethane foam, wherein a front seat portion for supporting a thigh of an occupant, a rear seat portion for supporting a buttock, and a thigh and a buttock. Urethane foam raw materials in which the mixing ratio of a polymer polyol and / or a foaming agent is controlled in each compartment of a foaming mold capable of at least compartmentalizing a vehicle seat pad into a side support portion which is raised on both sides to support a sitting posture. And then, the mold is closed and subjected to foam molding so that both numerical values of the hardness and the density of the urethane foam forming each part can be independently selected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001108435A JP2002300936A (en) | 2001-04-06 | 2001-04-06 | Seat pad for vehicle and manufacturing method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001108435A JP2002300936A (en) | 2001-04-06 | 2001-04-06 | Seat pad for vehicle and manufacturing method therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002300936A true JP2002300936A (en) | 2002-10-15 |
| JP2002300936A5 JP2002300936A5 (en) | 2010-03-25 |
Family
ID=18960571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001108435A Pending JP2002300936A (en) | 2001-04-06 | 2001-04-06 | Seat pad for vehicle and manufacturing method therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002300936A (en) |
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| WO2004058473A1 (en) * | 2002-12-24 | 2004-07-15 | Bridgestone Corporation | Polyurethane foam molding, method of producing the same, and seat pad for motor vehicle |
| JP2005246048A (en) * | 2003-12-26 | 2005-09-15 | Bridgestone Corp | Vehicle seat cushion pad, vehicle seat back pad, and vehicle seat |
| JP2006204887A (en) * | 2004-12-28 | 2006-08-10 | Bridgestone Corp | Seat cushion pad, seat back pad, and seat for vehicle |
| JP2007117186A (en) * | 2005-10-25 | 2007-05-17 | Inoac Corp | Vehicle seat cushion and vehicle seat |
| JP2011218227A (en) * | 2004-12-28 | 2011-11-04 | Bridgestone Corp | Seat back pad for vehicle, and seat for vehicle |
| WO2012043807A1 (en) * | 2010-10-01 | 2012-04-05 | 日産自動車株式会社 | Vehicle seat and stiffness setting method for vehicle seat |
| CN104401238A (en) * | 2014-10-29 | 2015-03-11 | 郑州精益达汽车零部件有限公司 | Vehicle seat sponge, manufacturing method, module and vehicle seat |
| WO2017104605A1 (en) * | 2015-12-16 | 2017-06-22 | 株式会社ブリヂストン | Seat pad |
| JP2018030392A (en) * | 2016-08-22 | 2018-03-01 | トヨタ紡織株式会社 | Vehicle seat |
| JP2020178784A (en) * | 2019-04-23 | 2020-11-05 | 株式会社イノアックコーポレーション | Sheet pad and manufacturing method thereof, and molding tool |
| WO2021215309A1 (en) | 2020-04-23 | 2021-10-28 | 東ソー株式会社 | Polyol composition for soft polyurethane foam molding, composition for soft polyurethane foam molding, soft polyurethane foam, and production method for same |
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| WO2004058473A1 (en) * | 2002-12-24 | 2004-07-15 | Bridgestone Corporation | Polyurethane foam molding, method of producing the same, and seat pad for motor vehicle |
| US7334278B2 (en) | 2002-12-24 | 2008-02-26 | Bridgestone Corporation | Molded polyurethane foam product, seat pad for vehicle, and method for molding polyurethane foam product |
| EP1591221B1 (en) * | 2002-12-24 | 2015-10-28 | Bridgestone Corporation | Method of producing a polyurethane foam product |
| JP2005246048A (en) * | 2003-12-26 | 2005-09-15 | Bridgestone Corp | Vehicle seat cushion pad, vehicle seat back pad, and vehicle seat |
| JP2006204887A (en) * | 2004-12-28 | 2006-08-10 | Bridgestone Corp | Seat cushion pad, seat back pad, and seat for vehicle |
| EP1832204A4 (en) * | 2004-12-28 | 2010-10-20 | Bridgestone Corp | Seat cushion pad, seat back pad, and seat for vehicle |
| JP2011218227A (en) * | 2004-12-28 | 2011-11-04 | Bridgestone Corp | Seat back pad for vehicle, and seat for vehicle |
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| RU2529057C1 (en) * | 2010-10-01 | 2014-09-27 | Ниссан Мотор Ко., Лтд. | Vehicle seat and method of seat stiffening |
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| CN103097182A (en) * | 2010-10-01 | 2013-05-08 | 日产自动车株式会社 | Vehicle seat and stiffness setting method for vehicle seat |
| JP5594366B2 (en) * | 2010-10-01 | 2014-09-24 | 日産自動車株式会社 | Vehicle seat and rigidity setting method for vehicle seat |
| WO2012043807A1 (en) * | 2010-10-01 | 2012-04-05 | 日産自動車株式会社 | Vehicle seat and stiffness setting method for vehicle seat |
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| CN104401238B (en) * | 2014-10-29 | 2017-09-29 | 郑州精益达汽车零部件有限公司 | A kind of automotive seat sponge, preparation method, mould and automotive seat |
| CN104401238A (en) * | 2014-10-29 | 2015-03-11 | 郑州精益达汽车零部件有限公司 | Vehicle seat sponge, manufacturing method, module and vehicle seat |
| WO2017104605A1 (en) * | 2015-12-16 | 2017-06-22 | 株式会社ブリヂストン | Seat pad |
| JPWO2017104605A1 (en) * | 2015-12-16 | 2018-10-04 | 株式会社ブリヂストン | Seat pad |
| US10631649B2 (en) | 2015-12-16 | 2020-04-28 | Bridgestone Corporation | Seat pad |
| JP2018030392A (en) * | 2016-08-22 | 2018-03-01 | トヨタ紡織株式会社 | Vehicle seat |
| JP2020178784A (en) * | 2019-04-23 | 2020-11-05 | 株式会社イノアックコーポレーション | Sheet pad and manufacturing method thereof, and molding tool |
| JP7603370B2 (en) | 2019-04-23 | 2024-12-20 | 株式会社イノアックコーポレーション | Seat pad, its manufacturing method, and mold |
| WO2021215309A1 (en) | 2020-04-23 | 2021-10-28 | 東ソー株式会社 | Polyol composition for soft polyurethane foam molding, composition for soft polyurethane foam molding, soft polyurethane foam, and production method for same |
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