JP2017030434A - Vehicle seat and manufacturing method of the same - Google Patents

Vehicle seat and manufacturing method of the same Download PDF

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JP2017030434A
JP2017030434A JP2015150715A JP2015150715A JP2017030434A JP 2017030434 A JP2017030434 A JP 2017030434A JP 2015150715 A JP2015150715 A JP 2015150715A JP 2015150715 A JP2015150715 A JP 2015150715A JP 2017030434 A JP2017030434 A JP 2017030434A
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urethane pad
trim cover
vehicle seat
seat
pad
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JP6741406B2 (en
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秀樹 鎌田
Hideki Kamata
秀樹 鎌田
文 佐々木
Fumi Sasaki
文 佐々木
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Tachi S Co Ltd
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Tachi S Co Ltd
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/14—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/90—Details or parts not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/58—Seat coverings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/64—Back-rests or cushions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B68—SADDLERY; UPHOLSTERY
    • B68G—METHODS, EQUIPMENT, OR MACHINES FOR USE IN UPHOLSTERING; UPHOLSTERY NOT OTHERWISE PROVIDED FOR
    • B68G7/00—Making upholstery
    • B68G7/05—Covering or enveloping cores of pads

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Manufacturing & Machinery (AREA)
  • Seats For Vehicles (AREA)
  • Mattresses And Other Support Structures For Chairs And Beds (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

PROBLEM TO BE SOLVED: To enable crimping and adhering of an urethane pad onto a sewing cover in a relatively short step using a fewer number of die components while enabling formation of a recess on the urethane pad by transferring a pattern formed in a female die in a step of bonding the sewing cover to the urethane pad without forming a recess on the urethane pad using a dedicated die when forming the urethane pad.SOLUTION: In a vehicle seat having a cushion seat or a seat back formed by covering a surface of an urethane pad 31 with a trim cover 32, a recess 30 is formed on the cushion seat or the seat back by embossing the urethane pad 31 and the trim cover 32 simultaneously.SELECTED DRAWING: Figure 5F

Description

本発明は、車両用シート及びその製造方法に関するものである。   The present invention relates to a vehicle seat and a method for manufacturing the same.

車両用シート及びその製造方法に関する従来技術として、特許文献１には、要約の欄に、位置決めピンや位置決め用のプレートを用いることなく縫製カバーとパッドとを簡単かつ確実に接着形成することができ、しかも未接着部を発生させるおそれがない表皮接着シートの製造方法として、成形下型に突設プラグ上に裏面にホットメルトフィルムを貼着してなる袋状の縫製カバーの縫合部をセットして真空吸引し、これにより縫製カバーを製品形状にプリフォームしたうえ、その表面にパッドを圧着して接着成型することが記載されている。また、縫製カバーの天板部の展開長をパッドの天板部の展開長よりも短くしておくことにより、プリフォームの際に縫製カバーの縫い足を一定方向に倒すことができると記載されている。   As a conventional technique related to a vehicle seat and a method for manufacturing the same, in Patent Document 1, a sewing cover and a pad can be easily and reliably bonded to each other without using a positioning pin or a positioning plate in the summary column. In addition, as a method for producing a skin-bonding sheet that does not cause unbonded parts, a stitched part of a bag-like sewing cover is formed by sticking a hot melt film on the back surface of a projecting plug to a lower mold. Then, vacuum suction is performed, and the sewing cover is preformed into a product shape, and then a pad is pressure-bonded to the surface to perform adhesive molding. In addition, it is described that the sewing foot of the sewing cover can be tilted in a predetermined direction at the time of preforming by making the development length of the top plate portion of the sewing cover shorter than the development length of the top plate portion of the pad. ing.

特開平７−１５８８号公報JP-A-7-1588

特許文献１に記載されている従来の縫製カバー（トリムカバー）をパッド（ウレタンパッド）に接着成型する方法においては、予め深溝が成形されたパッドと、このパッドの深溝の形状に合わせた突起部が成形された下型を用いて、パッドを縫製カバーに圧着して接着成型している。   In the conventional method of adhesively molding a sewing cover (trim cover) described in Patent Document 1 to a pad (urethane pad), a pad in which a deep groove is formed in advance and a protrusion that matches the shape of the deep groove of this pad Using a lower mold formed with a pad, the pad is pressure-bonded to a sewing cover and bonded.

この方法によれば、パッドには予め深溝を形成する工程が必要であり、深溝を形成するための手段(深溝の型)を、深溝の形状に応じた数だけ揃えておかなければならず、多品種の生産を行う場合に、段取りの時間が多くなり、これを短縮することが課題となっていた。
また、品種ごとにパッドの形状が異なる場合、異なるパッド形状に対応した数の型部品と、接着成型工程で用いる下型部品の総数が、車両用シートの品種が多くなるに伴って多くなり、これらの型部品を保管するスペースが大きくなってしまうという課題があった。 According to this method, the pad needs a step of forming a deep groove in advance, and means for forming the deep groove (deep groove mold) must be arranged in a number corresponding to the shape of the deep groove, In the case of producing a variety of products, the time required for setup is increased, and it has been a problem to shorten this.
Also, if the pad shape is different for each type, the total number of mold parts corresponding to different pad shapes and the lower mold parts used in the adhesive molding process increases as the number of types of vehicle seats increases. There has been a problem that the space for storing these mold parts becomes large.

また、パッドに形成された深溝と、下型の突起部との位置を合せるための機構が必要であり、接着成型工程で用いる装置の構成が多少複雑になっていた。   Further, a mechanism for aligning the positions of the deep groove formed in the pad and the lower mold protrusion is necessary, and the configuration of the apparatus used in the adhesive molding process is somewhat complicated.

車両用シートの意匠表現として車両用シートの表面に凹形状を形成する場合があるが、この凹形状を形成する場合にも、ウレタンパッド形成時に凹形状に対応した専用の型を用いて形成すると、凹形状ごとの専用の型を準備しなければならず、型の管理に多くのスペースが必要となってしまう。   As a design representation of the vehicle seat, a concave shape may be formed on the surface of the vehicle seat, but even when forming this concave shape, when forming using a dedicated mold corresponding to the concave shape when forming the urethane pad In addition, a dedicated die for each concave shape must be prepared, and a lot of space is required for die management.

本発明は、上記した従来技術の課題を解決して、ウレタンパッド形成時に専用の型を用いてウレタンパッドに凹部を形成することなく、縫製カバーをウレタンパッドの接着成型する工程で下型に形成したパターンをウレタンパッドに転写することでウレタンパッドに凹部を形成することができるようにして、より少ない型部品を用いて、比較的短い工程で、ウレタンパッドを縫製カバーに圧着して接着成型することを可能にする車両用シート及びその製造方法を提供するものである。   The present invention solves the above-mentioned problems of the prior art, and forms a sewing cover on the lower mold in the process of adhesive-molding the urethane pad without forming a recess in the urethane pad using a dedicated mold when forming the urethane pad. The concave pattern can be formed in the urethane pad by transferring the pattern to the urethane pad, and the urethane pad is pressure-bonded to the sewing cover and bonded in a relatively short process using fewer mold parts. The present invention provides a vehicle seat and a method for manufacturing the same.

上記した従来技術の課題を解決するために、本発明では、ウレタンパッドの表面をトリムカバーで覆って形成したクッションシートまたはシートバックを有する車両用シートにおいて、クッションシートまたはシートバックに、ウレタンパッドとトリムカバーとに同時にエンボス加工することにより凹部を形成した。
また、上記した従来技術の課題を解決するために、本発明では、ウレタンパッドの表面をトリムカバーで覆って形成したクッションシートまたはシートバックを有する車両用シートにおいて、クッションシートまたはシートバックには、ウレタンパッドとトリムカバーとに凹部が形成されており、ウレタンパッドの凹部の底面部分は、圧縮し加熱して成形した。
また、上記した従来技術の課題を解決するために、本発明では、車両用シートの製造方法において、凸部が形成された型の上に載置したトリムカバーに接着剤を挟んで加熱しながらウレタンパッドを押し付けてウレタンパッドとトリムカバーとを接着することにより、型に形成された凸部形状をウレタンパッドとトリムカバーに転写して、ウレタンパッドとトリムカバーとに凹部を形成するようにした。 In order to solve the above-described problems of the prior art, in the present invention, in a vehicle seat having a cushion seat or a seat back formed by covering the surface of the urethane pad with a trim cover, the cushion pad or the seat back includes a urethane pad and A recess was formed by embossing the trim cover at the same time.
In order to solve the above-described problems of the prior art, in the present invention, in the vehicle seat having a cushion seat or a seat back formed by covering the surface of the urethane pad with a trim cover, the cushion seat or the seat back includes: A recess is formed in the urethane pad and the trim cover, and the bottom surface portion of the recess of the urethane pad is molded by compression and heating.
Further, in order to solve the above-described problems of the prior art, in the present invention, in a method for manufacturing a vehicle seat, heating is performed with an adhesive sandwiched between a trim cover placed on a mold on which convex portions are formed. By pressing the urethane pad and bonding the urethane pad and the trim cover, the convex shape formed on the mold was transferred to the urethane pad and the trim cover, and a concave portion was formed on the urethane pad and the trim cover. .

本発明によれば、ウレタンパッドを形成する工程で凹部形状に応じた専用型を不要にして型部品の種類を削減すると共に、ウレタンパッドの成形とトリムカバーの貼り付けとを１工程で行うことができるようになり、工程数を削減できるようにした。   According to the present invention, in the process of forming the urethane pad, a dedicated mold corresponding to the shape of the recess is not required and the types of mold parts are reduced, and the urethane pad is molded and the trim cover is attached in one process. It became possible to reduce the number of processes.

本発明の実施例１に係る車両用シートの斜視図である。It is a perspective view of the vehicle seat which concerns on Example 1 of this invention. 本発明の実施例１に係る車両用シートの図１のＡ−Ａ断面図である。It is AA sectional drawing of FIG. 1 of the vehicle seat which concerns on Example 1 of this invention. 本発明の実施例１に係る車両用シートのウレタンパッドの断面図である。It is sectional drawing of the urethane pad of the vehicle seat which concerns on Example 1 of this invention. 本発明の実施例１に係る車両用シートのウレタンパッドとトリムカバーとを貼り合せるための下型の正面図である。It is a front view of the lower mold | type for bonding together the urethane pad and trim cover of the vehicle seat which concern on Example 1 of this invention. 本発明の実施例１に係る車両用シートのウレタンパッドとトリムカバーとを貼り合せる工程を示す図で、下型にトリムカバーを載置した状態を示す下型の正面の断面図である。It is a figure which shows the process of bonding the urethane pad and trim cover of the vehicle seat which concern on Example 1 of this invention, and is sectional drawing of the front surface of the lower mold | type which shows the state which mounted the trim cover in the lower mold | type. 本発明の実施例１に係る車両用シートのウレタンパッドとトリムカバーとを貼り合せる工程を示す図で、下型に載置したトリムカバーの上にシート状の接着剤を置いた状態を示す下型の正面の断面図である。It is a figure which shows the process of bonding the urethane pad and trim cover of the vehicle seat which concern on Example 1 of this invention, and is the bottom which shows the state which put the sheet-like adhesive agent on the trim cover mounted in the lower mold | type It is sectional drawing of the front of a type | mold. 本発明の実施例１に係る車両用シートのウレタンパッドとトリムカバーとを貼り合せる工程を示す図で、トリムカバーの上にシート状の接着剤を載置した下型の上方にウレタンパッドを搬送してきた状態を示す下型とウレタンパッドの正面の断面図である。It is a figure which shows the process of bonding the urethane pad and trim cover of the vehicle seat which concern on Example 1 of this invention, and conveys a urethane pad above the lower mold | type which mounted the sheet-like adhesive agent on the trim cover It is sectional drawing of the front of the lower mold | type and urethane pad which show the state which has been carried out. 本発明の実施例１に係る車両用シートのウレタンパッドとトリムカバーとを貼り合せる工程を示す図で、ウレタンパッドを下降させて下型の突起部分にウレタンパッドが当たり始めた状態を示す下型とウレタンパッドの正面の断面図である。The lower mold | type which shows the process of bonding the urethane pad and trim cover of the vehicle seat which concern on Example 1 of this invention, and lowers the urethane pad and shows the state which the urethane pad started to hit the protrusion part of a lower mold | type It is sectional drawing of the front of a urethane pad. 本発明の実施例１に係る車両用シートのウレタンパッドとトリムカバーとを貼り合せる工程を示す図で、ウレタンパッドを下降させて下型の突起部分にウレタンパッドが当たり始めた状態を示す下型とウレタンパッドの正面の断面図である。The lower mold | type which shows the process of bonding the urethane pad and trim cover of the vehicle seat which concern on Example 1 of this invention, and lowers the urethane pad and shows the state which the urethane pad started to hit the protrusion part of a lower mold | type It is sectional drawing of the front of a urethane pad. 本発明の実施例１に係る車両用シートのウレタンパッドとトリムカバーとを貼り合せる工程を示す図で、ウレタンパッドとウレタンパッドに接着されたトリムカバーとを上昇させて下型から外した状態を示す下型とウレタンパッドの正面の断面図である。The figure which shows the process of bonding the urethane pad and trim cover of the vehicle seat which concern on Example 1 of this invention, the state which raised the urethane pad and the trim cover adhere | attached on the urethane pad, and removed from the lower mold | type It is sectional drawing of the front of the lower mold | type and urethane pad to show. 本発明の実施例１に係る車両用シートのウレタンパッドとトリムカバーとを貼り合せる工程を示すフローチャートである。It is a flowchart which shows the process of bonding the urethane pad and trim cover of the vehicle seat which concern on Example 1 of this invention. 本発明の実施例１に係る車両用シートのウレタンパッドとトリムカバーとの凹部形状が形成された箇所の断面図である。It is sectional drawing of the location in which the recessed part shape of the urethane pad and trim cover of the vehicle seat which concerns on Example 1 of this invention was formed. 本発明の実施例２に係る車両用シートのウレタンパッドとトリムカバーとを貼り合せるための下型で、押し付け部を複数の部品で構成する例を示す下型の正面図である。It is a lower mold | type for laying together the urethane pad and trim cover of the vehicle seat which concern on Example 2 of this invention, and is a front view of the lower mold | type which shows the example which comprises a pressing part with several components. 本発明の実施例２に係る車両用シートのウレタンパッドとトリムカバーとを貼り合せるための下型で、押し付け部を複数の部品で構成する他の例を示す下型の正面図である。It is a lower mold | type for bonding the urethane pad and trim cover of the vehicle seat which concern on Example 2 of this invention, and is a front view of the lower mold | type which shows another example which comprises a pressing part with several components.

車両用シートのシートバック及びクッションシートは、ポリウレタンで形成されたウレタンパッドの表面に、表皮とカバーパッドと裏基布とで構成されるトリムカバーを貼り付けて形成されている。この車両用シートに用いられるウレタンパッドは、熱硬化性の特性を有し、加熱することにより収縮して硬化する性質を持っている。   A seat back and a cushion seat of a vehicle seat are formed by affixing a trim cover composed of a skin, a cover pad, and a back base fabric on the surface of a urethane pad formed of polyurethane. The urethane pad used in this vehicle seat has a thermosetting property and has a property of shrinking and curing when heated.

本発明では、この特性を利用して、ウレタンパッドの表面にトリムカバーを貼り付ける際にウレタンパッドを高温に保った型に押し当てて加熱して型に形成された凸形状のパターンをウレタンパッドに転写してウレタンパッドに凹部を成形すると同時に、その成形した凹部にトリムカバーを挿入して固定するようにしたものである。   In the present invention, by utilizing this characteristic, when a trim cover is attached to the surface of the urethane pad, the urethane pad is pressed against a mold kept at a high temperature and heated to form a convex pattern formed on the mold. At the same time as forming a recess in the urethane pad, a trim cover is inserted and fixed in the formed recess.

これにより、ウレタンパッドを形成する工程で凹部成型用の専用型を不要にして型部品の種類を削減すると共に、ウレタンパッドの成形とトリムカバーの貼り付けとを１工程で行うことができるようになり、工程数を削減できるようにした。   This eliminates the need for a dedicated mold for concave molding in the process of forming the urethane pad, reduces the number of mold parts, and allows the molding of the urethane pad and the attachment of the trim cover to be performed in one process. Therefore, the number of processes can be reduced.

以下に、本発明の実施例を、図を用いて説明する。   Embodiments of the present invention will be described below with reference to the drawings.

図１は、本発明で対象とする車両用シートである乗用車用シート１の基本的な構成を示す。乗用車用シート１は、クッションシート２、シートバック３、ヘッドレスト４、サイドサポート５を備えている。クッションシート２及びシートバック３には、意匠表現として周囲に対して一部凹んだ凹部（エンボス加工部）３０が形成されている。   FIG. 1 shows a basic configuration of a passenger car seat 1 which is a vehicle seat targeted in the present invention. The passenger car seat 1 includes a cushion seat 2, a seat back 3, a headrest 4, and a side support 5. The cushion sheet 2 and the seat back 3 are formed with concave portions (embossed portions) 30 that are partially recessed with respect to the surroundings as a design expression.

図１に示した例では、凹部（エンボス加工部）３０がクッションシート２とシートバック３との両方に形成した例を示したが、何れか一方だけに形成する場合もあり、またクッションシート２とシートバック３とで形成する凹部（エンボス加工部）３０の数や大きさ、形状が異なる場合もある。   In the example shown in FIG. 1, an example in which the concave portion (embossed portion) 30 is formed on both the cushion sheet 2 and the seat back 3 is shown. The number, size, and shape of the recesses (embossed portions) 30 formed between the seat back 3 and the seat back 3 may be different.

図２は、図１に示したシートバック３のＡ−Ａ断面の矢視図を示す。シートバック３の断面は、ウレタンパッド３１、表面を覆うトリムカバー３２で形成されている。ウレタンパッド３１には意匠用の凹形状３０が形成されており、この凹部３０の表面もトリムカバー３２で覆われている。   FIG. 2 is an arrow view of the AA cross section of the seat back 3 shown in FIG. The cross section of the seat back 3 is formed by a urethane pad 31 and a trim cover 32 that covers the surface. A concave shape 30 for design is formed on the urethane pad 31, and the surface of the concave portion 30 is also covered with a trim cover 32.

従来、この凹部３０は、型を用いてウレタンパッド３１を加工してウレタンパッド３１に凹部３０を形成した後に、トリムカバー３２を貼り付ける工程においてトリムカバー３２の側に型を用いて型とウレタンパッド３１に形成された凹部３０との位置を合せ、トリムカバー３２をウレタンパッド３１に貼り合せると同時にトリムカバー３２の一部をウレタンパッド３１に形成された凹部３０に嵌め込んでいた。   Conventionally, the recess 30 is formed by using a mold on the side of the trim cover 32 in the step of attaching the trim cover 32 after forming the recess 30 in the urethane pad 31 by processing the urethane pad 31 using a mold. The trim cover 32 is bonded to the urethane pad 31 at the same time as the recess 30 formed in the pad 31 and a portion of the trim cover 32 is fitted into the recess 30 formed in the urethane pad 31.

これに対して、本実施例においては、ウレタンパッド３１には図３に示すように、凹部３０が形成されていない状態でトリムカバー３２との貼り付けを行い、この貼り付けの工程において、トリムカバー３２の側に設けた型を用いてウレタンパッド３１に凹部３０を形成すると同時にトリムカバー３２を貼り付けるようにした。   On the other hand, in this embodiment, as shown in FIG. 3, the urethane pad 31 is attached to the trim cover 32 in a state in which the recess 30 is not formed. The trim cover 32 was affixed simultaneously with the formation of the recess 30 in the urethane pad 31 using a mold provided on the cover 32 side.

図４に、トリムカバー３２の側に設けた型（下型）４０の断面構造を示す。下型４０は、押し付け部４１と加熱部４３とを有し、押し付け部４１には、ウレタンパッド３１に凹形状３０を形成するための突起部４２が形成されている。また、加熱部４３には、外部の図示していない水蒸気供給源からから高温の水蒸気を導入するための導入穴４４、導入した高温の水蒸気を通す通路４５、通路４５内の水蒸気を押し付け部４１の裏面に供給する供給穴４６が設けられており、外部から導入した高温の水蒸気で押し付け部４１を加熱できるように構成されている。   FIG. 4 shows a cross-sectional structure of a mold (lower mold) 40 provided on the trim cover 32 side. The lower mold 40 has a pressing part 41 and a heating part 43, and the pressing part 41 is formed with a protrusion 42 for forming the concave shape 30 on the urethane pad 31. In addition, the heating unit 43 has an introduction hole 44 for introducing high-temperature water vapor from an external water vapor supply source (not shown), a passage 45 through which the introduced high-temperature water vapor is passed, and water vapor in the passage 45 is pressed against the heating unit 43. A supply hole 46 is provided to supply the back surface of the pressing portion 41, and the pressing portion 41 can be heated by high-temperature steam introduced from the outside.

下型は、熱伝導率が高い金属(例えばステンレス)で形成されている。   The lower mold is formed of a metal having high thermal conductivity (for example, stainless steel).

押し付け部４１の表面(図４における上面)の形状は、押し付ける相手側である図３に示したウレタンパッド３１の表面形状に合わせてある。   The shape of the surface of the pressing portion 41 (the upper surface in FIG. 4) is matched to the surface shape of the urethane pad 31 shown in FIG.

本実施例では、図４に示した下型４０にトリムカバー３２とシート状接着剤を載せた状態で下型４０の加熱部４３に高温の水蒸気を供給し押し付け部４１を加熱し、図３に示したウレタンパッド３１を下型４０に押付けることで、ウレタンパッド３１に凹部３０を形成すると共にウレタンパッド３１の表面にトリムカバー３２を貼り付けるようにしたものである。   In the present embodiment, high temperature steam is supplied to the heating unit 43 of the lower mold 40 in a state where the trim cover 32 and the sheet-like adhesive are placed on the lower mold 40 shown in FIG. By pressing the urethane pad 31 shown in FIG. 5 against the lower mold 40, the recess 30 is formed in the urethane pad 31 and the trim cover 32 is attached to the surface of the urethane pad 31.

本実施例によるウレタンパッド３１の表面へのトリムカバー３２の貼り付けの手順を図５Ａ乃至図５Ｆ及び図６のフロー図を用いて説明する。   The procedure for attaching the trim cover 32 to the surface of the urethane pad 31 according to this embodiment will be described with reference to FIGS. 5A to 5F and the flowcharts of FIGS.

まず、図５Ａに示すように、下型４０の押し付け部４１の上に、トリムカバー３２を供給する（Ｓ６０１）。次に、図５Ｂに示すように、押し付け部４１上に供給したトリムカバー３２の上にシート状接着剤（ホットメルト接着剤）５１を載せる（Ｓ６０２）。   First, as shown in FIG. 5A, the trim cover 32 is supplied onto the pressing portion 41 of the lower mold 40 (S601). Next, as shown in FIG. 5B, a sheet-like adhesive (hot melt adhesive) 51 is placed on the trim cover 32 supplied on the pressing portion 41 (S602).

この状態で、外部の図示していない水蒸気供給源から高温の水蒸気を、導入穴４４から下型４０の加熱部４３の通路４５内に導入する（Ｓ６０３）。通路４５に内部に導入された高温の水蒸気は、多数の供給穴４６を通って押し付け部４１の裏面に供給されて、押し付け部４１を加熱する。これにより、押し付け部４１に形成された突起部４２も加熱される。押し付け部４１の裏面に供給された水蒸気は、押し付け部４１の裏面と加熱部４３との間に形成された通路(図示せず)を通って外部に排出される。   In this state, high-temperature water vapor is introduced from an external water vapor supply source (not shown) through the introduction hole 44 into the passage 45 of the heating unit 43 of the lower mold 40 (S603). The high-temperature water vapor introduced into the passage 45 is supplied to the back surface of the pressing portion 41 through a number of supply holes 46 to heat the pressing portion 41. Thereby, the projection part 42 formed in the pressing part 41 is also heated. The water vapor supplied to the back surface of the pressing unit 41 is discharged to the outside through a passage (not shown) formed between the back surface of the pressing unit 41 and the heating unit 43.

次に、図５Ｃに示すように、上型６０で保持されたウレタンパッド３１を、図示していない搬送手段で下型４０の上部に配置し（Ｓ６０４）、図示していない手段で上型６０を矢印の方向に移動(下降)させる（Ｓ６０５）。   Next, as shown in FIG. 5C, the urethane pad 31 held by the upper mold 60 is placed on the upper part of the lower mold 40 by a conveying means (not shown) (S604), and the upper mold 60 by means not shown. Is moved (lowered) in the direction of the arrow (S605).

上型６０が下降を続けると、図５Ｄに示すように、まず下型４０の突起部４２が、その上部のトリムカバー３２とシート接着剤５１を介して接触する。この時突起部４２は加熱部４３から送り出される高温の水蒸気で加熱されており、ウレタンパッド３１のうち、トリムカバー３２とシート接着剤５１を介して突起部４２と接した部分は加熱されて収縮する（Ｓ６０６）。   When the upper mold 60 continues to descend, as shown in FIG. 5D, first, the protrusion 42 of the lower mold 40 comes into contact with the upper trim cover 32 via the sheet adhesive 51. At this time, the protrusion 42 is heated by high-temperature steam sent out from the heating part 43, and the portion of the urethane pad 31 that is in contact with the protrusion 42 via the trim cover 32 and the sheet adhesive 51 is heated and contracts. (S606).

上型６０はさらに下降を続け、上型６０に保持されたウレタンパッド３１は下型４０の押し付け部４１と全面的に接触するまで下降して図５Ｅに示す状態になる（Ｓ６０７）。この状態では、高温の水蒸気で加熱された押し付け部４１により加熱されてウレタンパッド３１及びトリムカバー３２は収縮する。同時に、加熱されたシート接着剤５１によりウレタンパッド３１にトリムカバー３２が接着されるとともに、ウレタンパッド３１には、下型４０の突起部４２に対応する形状が転写され、突起部４２の形状に相当する凹部３０が形成される（エンボス加工）（Ｓ６０８）。この時、トリムカバー３２は、下型４０の突起部４２に引っ張られて凹部３０の内部に入りシート接着剤５１でウレタンパッド３１に接着されるので、ウレタンパッド３１に形成された凹部３０の表面は、トリムカバー３２で覆われることになる。   The upper die 60 continues to descend further, and the urethane pad 31 held by the upper die 60 is lowered until it comes into full contact with the pressing portion 41 of the lower die 40 to be in the state shown in FIG. 5E (S607). In this state, the urethane pad 31 and the trim cover 32 contract by being heated by the pressing portion 41 heated by high-temperature steam. At the same time, the trim cover 32 is bonded to the urethane pad 31 by the heated sheet adhesive 51, and the shape corresponding to the protruding portion 42 of the lower mold 40 is transferred to the urethane pad 31, so that the shape of the protruding portion 42 is obtained. A corresponding recess 30 is formed (embossing) (S608). At this time, the trim cover 32 is pulled by the protrusion 42 of the lower mold 40 and enters the recess 30 and is bonded to the urethane pad 31 by the sheet adhesive 51, so that the surface of the recess 30 formed in the urethane pad 31. Is covered with the trim cover 32.

上型６０でウレタンパッド３１を下型４０に所定の時間押付けて、凹部３０の内面を含めたウレタンパッド３１のトリムカバー３２で覆われる面全面を確実に接着した後、図示していない外部の水蒸気供給源から加熱部４３への高温の水蒸気の供給を停止し（Ｓ６０９）、図５Ｆに示すように、表面にトリムカバー３２が接着されたウレタンパッド３１を保持した状態で、上型６０を矢印の向きに上昇させてウレタンパッド３１を下型４０から離し（Ｓ６１０）、図示していない搬送手段でウレタンパッド３１を所定の場所へ搬送して（Ｓ６１１）、一連の動作が終了する。   After pressing the urethane pad 31 with the upper die 60 against the lower die 40 for a predetermined time and securely bonding the entire surface covered with the trim cover 32 of the urethane pad 31 including the inner surface of the recess 30, The supply of high-temperature steam from the steam supply source to the heating unit 43 is stopped (S609), and the upper mold 60 is held in a state where the urethane pad 31 having the trim cover 32 bonded to the surface is held as shown in FIG. 5F. The urethane pad 31 is lifted in the direction of the arrow to separate it from the lower mold 40 (S610), and the urethane pad 31 is transported to a predetermined place by a transport means (not shown) (S611), and a series of operations is completed.

このようなプロセスを経ることにより、図２に示したような断面形状を有するバックシート３が形成される。   Through such a process, the back sheet 3 having a cross-sectional shape as shown in FIG. 2 is formed.

図７に、凹部３０が形成された部分のウレタンパッド３１とトリムカバー３２の断面図を示す。ウレタンパッド３１は、トリムカバー接着時に高温の水蒸気が供給された下型４０から熱を受けて、下型４０に近い部分、すなわちトリムカバー３２が接着された面及びその近傍の部分には加熱され加圧されて収縮した層３１２が形成されている。更に、凹部３０の底の部分は周囲と比べてより大きく収縮した層３１３が形成されている。これに対して下型４０からある程度離れた部分は、熱による影響を受けずに元の状態を保った層３１１が形成されている。   FIG. 7 shows a cross-sectional view of the urethane pad 31 and the trim cover 32 in a portion where the recess 30 is formed. The urethane pad 31 receives heat from the lower mold 40 to which high-temperature water vapor is supplied when the trim cover is bonded, and the portion close to the lower mold 40, that is, the surface to which the trim cover 32 is bonded and the vicinity thereof are heated. A layer 312 is formed that is compressed and contracted. Further, a layer 313 that is more contracted than the surroundings is formed at the bottom of the recess 30. On the other hand, a layer 311 that maintains the original state without being affected by heat is formed in a part away from the lower mold 40 to some extent.

なお、上記した実施例においては、下型４０に対して上型６０が下降する構成で説明したが、逆に上型６０に対して下型４０を上昇させて凹部の形成と接着とを行うようにしてもよい。   In the above-described embodiment, the configuration has been described in which the upper mold 60 is lowered with respect to the lower mold 40, but conversely, the lower mold 40 is raised with respect to the upper mold 60 to form and bond the recess. You may do it.

また、上記した実施例においては、接着剤としてシート状接着剤（ホットメルト接着剤）５１を用いた例について説明したが、本実施例はこれに限られるものではなく、スプレー状の接着剤、または液状の接着剤を用いるようにしてもよい。またこの場合、スプレー状の接着剤、または液状の接着剤をウレタンパッド３１の側に塗布するようにしてもよい。   Moreover, in the above-described embodiment, an example in which the sheet-like adhesive (hot melt adhesive) 51 is used as the adhesive has been described. However, the present embodiment is not limited to this, and a spray-like adhesive, Alternatively, a liquid adhesive may be used. In this case, a spray-like adhesive or a liquid adhesive may be applied to the urethane pad 31 side.

本実施例によれば、ウレタンパッドに凹部形状を形成してその表面にトリムカバーを貼り付ける場合に、ウレタンパッド単体での成型工程を不要にしてウレタンパッドの成形とトリムカバーの貼り付けとを１工程で行うことができるようになり、工程数を削減できるようになった。   According to this embodiment, when forming a concave shape on the urethane pad and attaching the trim cover to the surface, the molding process of the urethane pad alone is not required, and the urethane pad is molded and the trim cover is attached. It can be performed in one process, and the number of processes can be reduced.

また、ウレタンパッドに予め凹部形状を成形することを不要としたので、ウレタンパッド形成時に凹部形状に応じた専用の型を用意する必要がなくなり、ウレタンパッド形成用の型の種類を減らすことができるようになった。   In addition, since it is not necessary to mold the concave shape in advance on the urethane pad, it is not necessary to prepare a dedicated mold corresponding to the concave shape when forming the urethane pad, and the types of molds for forming the urethane pad can be reduced. It became so.

実施例１においては、下型４０の押し付け部４１を１部品で形成したが、本実施例においては、押し付け部４１−１または４１−２を複数の部品で構成する。   In the first embodiment, the pressing portion 41 of the lower mold 40 is formed by one component. However, in this embodiment, the pressing portion 41-1 or 41-2 is configured by a plurality of components.

すなわち、図７Ａ及び図７Ｂに示すように、押し付け部４１−１又は４１−２を加熱部４３に対して着脱可能な構造とし、押し付け部４１−１又は４１−２を例えば３つの部材４１１，４１２，４１３又は、４１１，４１２，４１４で構成する。このように、押し付け部４１−１又は４１−２を複数の部材で構成し、図７Ａに示した下型４０−１と図７Ｂに示した下型４０−２の場合のように、部品４１１と４１２とを共通化して部品４１３と４１４とを取り換えることで、下型４０−１または下型４０−２を構成し、ウレタンパッド３１に形成する凹部（エンボス形状）３０の形状に対応することができるようにした。   That is, as shown in FIGS. 7A and 7B, the pressing portion 41-1 or 41-2 is structured to be detachable from the heating portion 43, and the pressing portion 41-1 or 41-2 is, for example, three members 411, 412 413 or 411 412 414. In this manner, the pressing portion 41-1 or 41-2 is constituted by a plurality of members, and the component 411 is provided as in the case of the lower die 40-1 shown in FIG. 7A and the lower die 40-2 shown in FIG. 7B. And 412 are used in common and the parts 413 and 414 are replaced with each other, so that the lower mold 40-1 or the lower mold 40-2 is configured to correspond to the shape of the recess (embossed shape) 30 formed in the urethane pad 31. I was able to.

本実施例による下型を用いたウレタンパッド３１とトリムカバー３２との貼り付け及び凹部３０の形成方法は実施例１で説明した方法と同じであるので、説明を省略する。   Since the method of attaching the urethane pad 31 and the trim cover 32 using the lower mold and the method of forming the recess 30 according to the present embodiment are the same as the method described in the first embodiment, the description thereof is omitted.

押し付け部４１−１又は４１−２をこのように構成することにより、ウレタンパッド３１に形成する凹部（エンボス形状）の形状に対応する押し付け部の部品を小型化することができ、型部品の省資源化と低コスト化、及び部品保管場所の省スペース化を実現することができる。   By configuring the pressing portion 41-1 or 41-2 in this way, it is possible to reduce the size of the pressing portion corresponding to the shape of the recess (embossed shape) formed in the urethane pad 31, and to save the mold parts. Resource saving, cost reduction, and space saving of parts storage location can be realized.

１・・・車両用シート ２・・・クッションシート ３・・・シートバック ３０・・・凹部 ３１・・・ウレタンパッド ３２・・・トリムカバー ４０・・・下型 ４１・・・押し付け部 ４３・・・加熱部 ６０・・・上型。   DESCRIPTION OF SYMBOLS 1 ... Vehicle seat 2 ... Cushion seat 3 ... Seat back 30 ... Recess 31 ... Urethane pad 32 ... Trim cover 40 ... Lower mold 41 ... Pressing part 43. ..Heating unit 60 ... Upper mold.

Claims (6)

ウレタンパッドの表面をトリムカバーで覆って形成したクッションシートまたはシートバックを有する車両用シートであって、
前記クッションシートまたはシートバックには、前記ウレタンパッドと前記トリムカバーとに同時にエンボス加工して成形した凹部が形成されていることを特徴とする車両用シート。 A vehicle seat having a cushion seat or a seat back formed by covering the surface of a urethane pad with a trim cover,
The vehicle seat, wherein the cushion seat or the seat back is formed with a recess formed by embossing the urethane pad and the trim cover at the same time. 請求項１記載の車両用シートであって、前記凹部は、前記ウレタンパッドと前記トリムカバーとを加熱しながら同時にエンボス加工して成形したものであることを特徴とする車両用シート。   The vehicle seat according to claim 1, wherein the concave portion is formed by embossing the urethane pad and the trim cover while heating. 請求項１記載の車両用シートであって、前記ウレタンパッドと前記トリムカバーとに形成された凹部は、前記ウレタンパッドと前記トリムカバーとの間に接着剤を挟んだ状態で加熱しながら同時にエンボス加工することにより形成されたものであることを特徴とする車両用シート。   The vehicle seat according to claim 1, wherein the recess formed in the urethane pad and the trim cover is simultaneously embossed while being heated with an adhesive sandwiched between the urethane pad and the trim cover. A vehicular seat characterized by being formed by processing. ウレタンパッドの表面をトリムカバーで覆って形成したクッションシートまたはシートバックを有する車両用シートであって、
前記クッションシートまたはシートバックには、前記ウレタンパッドと前記トリムカバーとに凹部が形成されており、前記ウレタンパッドの凹部の底面部分は、圧縮し加熱して成形されていることを特徴とする車両用シート。 A vehicle seat having a cushion seat or a seat back formed by covering the surface of a urethane pad with a trim cover,
The cushion seat or the seat back has a recess formed in the urethane pad and the trim cover, and a bottom portion of the recess of the urethane pad is molded by being compressed and heated. Sheet. 車両用シートの製造方法であって、凸部が形成された型の上に載置したトリムカバーに接着剤を挟んで加熱しながらウレタンパッドを押し付けて前記ウレタンパッドと前記トリムカバーとを接着することにより、前記型に形成された凸部形状を前記ウレタンパッドと前記トリムカバーに転写して、前記ウレタンパッドと前記トリムカバーとに凹部を形成することを特徴とする車両用シートの製造方法。   A method for manufacturing a vehicle seat, wherein the urethane pad and the trim cover are bonded by pressing the urethane pad while sandwiching and heating the trim cover placed on the mold on which the convex portion is formed. Thereby, the convex part shape formed in the said mold | die is transcribe | transferred to the said urethane pad and the said trim cover, and the recessed part is formed in the said urethane pad and the said trim cover, The manufacturing method of the vehicle seat characterized by the above-mentioned. 請求項５記載の車両用シートの製造方法であって、前記凸部が形成された型に押付ける前記ウレタンパッドの表面は、前記凹部に対応する凹みがなく、平坦に形成されていることを特徴とする車両用シートの製造方法。   6. The method of manufacturing a vehicle seat according to claim 5, wherein the surface of the urethane pad that is pressed against the mold in which the convex portion is formed has no recess corresponding to the concave portion and is formed flat. A method for manufacturing a vehicle seat, which is characterized.
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