JP6819939B2 - Vehicle seat back structure - Google Patents

Vehicle seat back structure Download PDF

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Publication number
JP6819939B2
JP6819939B2 JP2017052977A JP2017052977A JP6819939B2 JP 6819939 B2 JP6819939 B2 JP 6819939B2 JP 2017052977 A JP2017052977 A JP 2017052977A JP 2017052977 A JP2017052977 A JP 2017052977A JP 6819939 B2 JP6819939 B2 JP 6819939B2
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Prior art keywords
headrest
vehicle
protrusion
seat back
holder
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JP2018154243A (en
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貴久 江川
貴久 江川
昌人 市川
昌人 市川
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Suzuki Motor Co Ltd
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Suzuki Motor Co Ltd
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Priority to JP2017052977A priority Critical patent/JP6819939B2/en
Priority to DE102018101756.1A priority patent/DE102018101756B4/en
Priority to FR1850858A priority patent/FR3063940B1/en
Priority to CN201810175806.2A priority patent/CN108621888B/en
Publication of JP2018154243A publication Critical patent/JP2018154243A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B29C65/60—Riveting or staking
    • B29C65/606—Riveting or staking the rivets being integral with one of the parts to be joined, i.e. staking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
    • B29C66/7212—Fibre-reinforced materials characterised by the composition of the fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • 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
    • 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
    • B60N2/68—Seat frames
    • 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
    • B60N2/68—Seat frames
    • B60N2/682—Joining means
    • 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
    • B60N2/68—Seat frames
    • B60N2/686—Panel like structures
    • 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
    • B60N2/80—Head-rests
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3005—Body finishings
    • B29L2031/3023—Head-rests
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/771—Seats

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Seats For Vehicles (AREA)

Description

本発明は、車両用シートバック構造に関する。 The present invention relates to a vehicle seat back structure.

車両用シートは、乗員が着座するシートクッションと、乗員の上肢を支持するシートバックを備えている。シートバックを構成するシートバックパネルは、例えば、特許文献１に開示されているように、軽量化を図るために樹脂材料に形成されているものが知られている。 The vehicle seat includes a seat cushion on which the occupant sits and a seat back that supports the occupant's upper limbs. As the seat back panel constituting the seat back, for example, as disclosed in Patent Document 1, it is known that the seat back panel is formed of a resin material in order to reduce the weight.

また、シートバックパネルの上部には、ヘッドレストが取り付けられている。そのため、当該パネルの上部には、ヘッドレストから伝わる荷重に対して、所定の支持剛性が必要となる。 In addition, a headrest is attached to the upper part of the seat back panel. Therefore, the upper part of the panel needs to have a predetermined support rigidity against the load transmitted from the headrest.

特許文献１には、シートバックフレームを樹脂化した際に、ヘッドレストのステーを支持するブラケットに対する支持剛性を、簡易な構造で向上しようとしているシートバックフレームのブラケット固定構造が開示されている。ブラケットは、略矩形筒状に形成され、シート上下方向が長手方向となるように配置されている。 Patent Document 1 discloses a bracket fixing structure of the seat back frame, which is intended to improve the support rigidity of the bracket that supports the stay of the headrest with a simple structure when the seat back frame is made of resin. The bracket is formed in a substantially rectangular tubular shape, and is arranged so that the vertical direction of the seat is the longitudinal direction.

特開２０１５−００３６７４号公報JP 2015-003674

しかしながら、上記例の構造では、ブラケットの材質については言及されていないが、ブラケットとシートバックフレームを接着剤で接合しているため、接着剤の固化に時間を要してしまう。その結果、シートバックフレームの組立て時間が長くなり、生産効率の低下を招く。 However, in the structure of the above example, although the material of the bracket is not mentioned, since the bracket and the seat back frame are joined by an adhesive, it takes time to solidify the adhesive. As a result, the assembly time of the seat back frame becomes long, which leads to a decrease in production efficiency.

また、上記例の構造では、筒状に形成されているブラケットをシートバックフレームに接合するため、ステー周囲の接合部は、２枚の壁が重なる、いわゆる二層構造となっている。そのため、接合部は重量の増加となり、さらなる軽量化には改善の余地がある。 Further, in the structure of the above example, since the bracket formed in a tubular shape is joined to the seat back frame, the joint portion around the stay has a so-called two-layer structure in which two walls overlap. Therefore, the weight of the joint is increased, and there is room for improvement in further weight reduction.

本発明は上記課題を解決するためになされたものであって、その目的は、ヘッドレストが取り付けられる樹脂製のシートバックパネルの剛性を維持しつつ、生産性を高めることができる車両用シートバック構造を提供することである。 The present invention has been made to solve the above problems, and an object of the present invention is a vehicle seat back structure capable of increasing productivity while maintaining the rigidity of a resin seat back panel to which a headrest is attached. Is to provide.

上記目的を達成するため本発明に係る車両用シートバック構造は、樹脂製のシートバックパネルの上部に、ヘッドレストガイドを介してヘッドレストを支持するための樹脂製のヘッドレストホルダが取り付けられている。当該車両用シートバック構造において、前記ヘッドレストホルダの上部には、前記ヘッドレストガイドが挿入される上側開口部が設けられ、前記ヘッドレストホルダの車両後部には、車両上下方向に延びている後側開口部が設けられ、該後側開口部の車幅方向両側部のそれぞれには、車両後方に突出している少なくとも１つの突起部が設けられ、前記シートバックパネルの上部には、前記突起部が挿入されている貫通孔が形成され、前記後側開口部の車幅方向両側部と、前記貫通孔の周縁部が接合されることにより、内側に前記ヘッドレストガイドが配置される閉断面構造が形成されている。 In order to achieve the above object, in the vehicle seat back structure according to the present invention, a resin headrest holder for supporting the headrest is attached to the upper part of the resin seat back panel via a headrest guide. In the vehicle seat back structure, an upper opening into which the headrest guide is inserted is provided in the upper portion of the headrest holder, and a rear opening extending in the vehicle vertical direction is provided in the vehicle rear portion of the headrest holder. Is provided, and at least one protrusion protruding rearward of the vehicle is provided on each of both sides of the rear opening in the vehicle width direction, and the protrusion is inserted into the upper part of the seat back panel. A closed cross-sectional structure in which the headrest guide is arranged is formed by joining both sides of the rear opening in the vehicle width direction and the peripheral edge of the through hole. There is.

本発明に係る車両用シートバック構造によれば、ヘッドレストが取り付けられる樹脂製のシートバックパネルの剛性を維持しつつ、生産性を高めることが可能となる。 According to the vehicle seat back structure according to the present invention, it is possible to increase productivity while maintaining the rigidity of the resin seat back panel to which the headrest is attached.

本発明に係る車両用シートバック構造の概略を示す斜視図である。It is a perspective view which shows the outline of the seat back structure for a vehicle which concerns on this invention. 図１のシートバックパネルのフロントパネルに、ヘッドレストガイドが挿入される前の状態を示す斜視図である。It is a perspective view which shows the state before the headrest guide is inserted into the front panel of the seat back panel of FIG. 図２のＡ部の拡大斜視図である。It is an enlarged perspective view of the part A of FIG. 図２のヘッドレストホルダの突起部が、フロントパネルのヘッドレスト設置部の貫通孔に挿入されている状態を、車両後方から見た斜視図である。FIG. 2 is a perspective view of the state in which the protrusion of the headrest holder of FIG. 2 is inserted into the through hole of the headrest installation portion of the front panel as viewed from the rear of the vehicle. 図４のヘッドレストホルダを超音波かしめによって、ヘッドレスト設置部に接合された状態を示す斜視図である。It is a perspective view which shows the state which the headrest holder of FIG. 4 is joined to the headrest installation part by ultrasonic caulking. 図４のヘッドレストホルダを単体で示す斜視図である。It is a perspective view which shows the headrest holder of FIG. 4 alone. 図６のヘッドレストホルダを車両前方から見た斜視図である。FIG. 6 is a perspective view of the headrest holder of FIG. 6 as viewed from the front of the vehicle. （ａ）は図３のＢ−Ｂ矢視断面図であり、（ｂ）は（ａ）の比較例で棚を設けない構成を示している。(A) is a cross-sectional view taken along the line BB of FIG. 3, and (b) shows a configuration in which a shelf is not provided in the comparative example of (a). （ａ）は図３のＣ−Ｃ矢視断面図であり、（ｂ）は（ａ）の比較例で棚を設けない構成を示している。(A) is a cross-sectional view taken along the line CC of FIG. 3, and (b) shows a configuration in which a shelf is not provided in the comparative example of (a).

以下、本発明に係る車両用シートバック構造の一実施形態について、図面（図１〜図９）を参照して説明する。 Hereinafter, an embodiment of the vehicle seat back structure according to the present invention will be described with reference to the drawings (FIGS. 1 to 9).

本実施形態に係る車両用シートバック構造は、シートバックパネル１を構成するフロントパネル１０に、ヘッドレスト４０のヘッドレストガイド４５が取り付けられている構造である。 The vehicle seat back structure according to the present embodiment is a structure in which the headrest guide 45 of the headrest 40 is attached to the front panel 10 constituting the seat back panel 1.

本実施形態のシートバックパネル１は、図１に示すように、樹脂製のフロントパネル１０及び樹脂製のリヤパネル２０を備えている。フロントパネル１０及びリヤパネル２０は、車両前後方向に重ね合わされ、フロントパネル１０のフランジ部１１，１２と、リヤパネル２０のフランジ部（図示せず）とが接合されている。 As shown in FIG. 1, the seat back panel 1 of the present embodiment includes a resin front panel 10 and a resin rear panel 20. The front panel 10 and the rear panel 20 are overlapped in the front-rear direction of the vehicle, and the flange portions 11 and 12 of the front panel 10 and the flange portions (not shown) of the rear panel 20 are joined.

図示は省略するが、この例におけるシートバックパネル１は、中空断面構造となっている。また、シートバックパネルの上部には、シートベルトリトラクタ（図示せず）を収容するためのリトラクタ収容部２が設けられている。 Although not shown, the seat back panel 1 in this example has a hollow cross-sectional structure. Further, a retractor accommodating portion 2 for accommodating a seatbelt retractor (not shown) is provided on the upper part of the seat back panel.

ここで、各パネル１０，２０は、例えば、ＣＦＲＰ(carbon fiber reinforced plastics)のような炭素繊維強化樹脂材料により形成されている。繊維強化樹脂材料のマトリクス樹脂として、ＰＰ、ＰＡ６、ＰＡ１２、ＰＡ６６、ＰＥＥＫ、ＰＣ、ＰＥＴ等の様々な熱可塑性樹脂を用いて形成することが可能である。 Here, the panels 10 and 20 are formed of, for example, a carbon fiber reinforced resin material such as CFRP (carbon fiber reinforced plastics). As the matrix resin of the fiber reinforced resin material, it can be formed by using various thermoplastic resins such as PP, PA6, PA12, PA66, PEEK, PC and PET.

リヤパネル２０は、上記のような樹脂材料からなり、図１に示すように、車幅方向に延びる略長方形の板状の部材である。当該リヤパネル２０は、熱可塑性のＣＦＲＰを、スタンピング成形することにより形成されている。 The rear panel 20 is made of the resin material as described above, and is a substantially rectangular plate-shaped member extending in the vehicle width direction as shown in FIG. The rear panel 20 is formed by stamping molding thermoplastic CFRP.

続いて、フロントパネル１０について説明する。フロントパネル１０の周縁には、リヤパネル２０と同様に、フランジ部１１が設けられている。フロントパネル１０のフランジ部１１の車両後面に、リヤパネル２０のフランジ部の車両前面が接合されている。また、リヤパネル２０と同様に、フロントパネル１０は、熱可塑性のＣＦＲＰを、スタンピング成形することにより形成されている。 Subsequently, the front panel 10 will be described. Similar to the rear panel 20, a flange portion 11 is provided on the peripheral edge of the front panel 10. The front surface of the flange portion of the rear panel 20 is joined to the rear surface of the vehicle by the flange portion 11 of the front panel 10. Further, like the rear panel 20, the front panel 10 is formed by stamping molding thermoplastic CFRP.

図１に示すように、フロントパネル１０のフランジ部１１のうち、上部に配置されている上側フランジ部１２は、リトラクタ収容部２の車幅方向両側にそれぞれ配置されている。上側フランジ部１２には、ヘッドレストガイド４５が取り付けられるヘッドレスト設置部１５が設けられている。 As shown in FIG. 1, of the flange portions 11 of the front panel 10, the upper flange portions 12 arranged at the upper part are arranged on both sides of the retractor accommodating portion 2 in the vehicle width direction. The upper flange portion 12 is provided with a headrest installation portion 15 to which the headrest guide 45 is attached.

この例のヘッドレスト設置部１５は、平坦部１５ａを有している。１つのヘッドレスト設置部１５には、平坦部１５ａを車両前後方向に貫通している８つの貫通孔１６〜１９を有している。この例では４つの貫通孔１６〜１９を１組とし、１組の貫通孔１６〜１９が、１つのヘッドレストガイド４５の取付けに対応している。 The headrest installation portion 15 of this example has a flat portion 15a. One headrest installation portion 15 has eight through holes 16 to 19 penetrating the flat portion 15a in the front-rear direction of the vehicle. In this example, four through holes 16 to 19 are set as one set, and one set of through holes 16 to 19 corresponds to the attachment of one headrest guide 45.

１組の貫通孔１６〜１９は、この例では、図４における左側の左上貫通孔１６及び左下貫通孔１７、図４における右側の右上貫通孔１８及び右下貫通孔１９を有している。各貫通孔１６〜１９は、車両上下方向に延びる略長方形状である。左上貫通孔１６及び左下貫通孔１７は、車両上下方向に間隔を空けて配置され、右上貫通孔１８及び右下貫通孔１９も、車両上下方向に間隔を空けて配置されている。また、左上貫通孔１６及び右上貫通孔１８は、車幅方向に間隔を空けて配置されている。左下貫通孔１７及び右下貫通孔１９も、車幅方向に間隔を空けて配置されている。この例では、４つの貫通孔１６〜１９は、左右対称となるように配置されているが、これに限られるものではない。 In this example, a set of through holes 16 to 19 has a left upper left through hole 16 and a lower left through hole 17 in FIG. 4, and a right upper right through hole 18 and a lower right through hole 19 in FIG. Each of the through holes 16 to 19 has a substantially rectangular shape extending in the vertical direction of the vehicle. The upper left through hole 16 and the lower left through hole 17 are arranged at intervals in the vertical direction of the vehicle, and the upper right through hole 18 and the lower right through hole 19 are also arranged at intervals in the vertical direction of the vehicle. Further, the upper left through hole 16 and the upper right through hole 18 are arranged at intervals in the vehicle width direction. The lower left through hole 17 and the lower right through hole 19 are also arranged at intervals in the vehicle width direction. In this example, the four through holes 16 to 19 are arranged so as to be symmetrical, but the present invention is not limited to this.

ヘッドレスト設置部１５には、ヘッドレストホルダ３０が接合されている。ヘッドレストホルダ３０は、図３に示すように、ヘッドレストガイド４５を取り付けるための部材である。ヘッドレストガイド４５の詳細は省略するが、いわゆる筒状で、車両上下方向に延び、上端（頭部）は、側部よりも径方向に張り出している。図１に示すヘッドレスト４０の下部のステー４１が、当該ヘッドレストガイド４５を介して、ヘッドレスト設置部１５に取り付けられる。 A headrest holder 30 is joined to the headrest installation portion 15. As shown in FIG. 3, the headrest holder 30 is a member for attaching the headrest guide 45. Although the details of the headrest guide 45 are omitted, it has a so-called tubular shape, extends in the vertical direction of the vehicle, and the upper end (head) projects in the radial direction from the side portion. The stay 41 at the lower part of the headrest 40 shown in FIG. 1 is attached to the headrest installation portion 15 via the headrest guide 45.

以下、ヘッドレストホルダ３０の構造について説明する。ヘッドレストホルダ３０は、フロントパネル１０やリヤパネル２０と同様に、樹脂材料により形成されている部材である。ヘッドレストホルダ３０は、車両上下方向に延び、横断面（平断面）が、略Ｕ字形状である。また、ヘッドレストホルダ３０の上部及び下部には、それぞれ、上側開口部３３ａ及び下側開口部３３ｂが設けられ、車両後部には、車両上下方向に延びている後側開口部３４が設けられている（図８）。 Hereinafter, the structure of the headrest holder 30 will be described. The headrest holder 30 is a member made of a resin material, like the front panel 10 and the rear panel 20. The headrest holder 30 extends in the vertical direction of the vehicle and has a substantially U-shaped cross section (flat cross section). Further, the upper portion and the lower portion of the headrest holder 30 are provided with an upper opening 33a and a lower opening 33b, respectively, and the rear portion of the vehicle is provided with a rear opening 34 extending in the vertical direction of the vehicle. (Fig. 8).

ヘッドレストホルダ３０は、図６及び図７に示すように、Ｕ字形の両側を構成する２つの左側壁３２ａ及び右側壁３２ｂと、Ｕ字形の底部を構成する前壁３２ｃを有している。該前壁３２ｃ、左側側壁３２ａ及び右側壁３２ｂは、一体的に形成され、それぞれが車両上下方向に延びている。すなわち、ヘッドレストホルダ３０は、Ｕ字形状で、車両上下に貫通し、Ｕ字の開口が後側開口部３４となる。 As shown in FIGS. 6 and 7, the headrest holder 30 has two left side walls 32a and right side walls 32b forming both sides of the U shape, and a front wall 32c forming the bottom of the U shape. The front wall 32c, the left side wall 32a, and the right side wall 32b are integrally formed, and each extends in the vertical direction of the vehicle. That is, the headrest holder 30 has a U-shape and penetrates up and down the vehicle, and the U-shaped opening becomes the rear opening 34.

また、ヘッドレストホルダ３０の車両後部には、車両後方に突出する４つの突起部（左上側突起部３６、左下側突起部３７、右上側突起部３８、右下側突起部３９）が設けられている。詳細には、左側壁３２ａの車両後部に、左上側突起部３６及び左下側突起部３７が設けられ、右側壁３２ｂの車両後部に、右上側突起部３８及び右下側突起部３９が設けられている。 Further, the rear portion of the headrest holder 30 is provided with four protrusions (upper left protrusion 36, lower left protrusion 37, upper right protrusion 38, lower right protrusion 39) protruding rearward of the vehicle. There is. Specifically, the upper left side protrusion 36 and the lower left side protrusion 37 are provided on the rear part of the vehicle on the left side wall 32a, and the upper right side protrusion 38 and the lower right side protrusion 39 are provided on the rear part of the vehicle on the right side wall 32b. ing.

左上側突起部３６及び左下側突起部３７は、後側開口部３４の図６における左側の開口縁３４ａよりも左側に、車両上下方向に互いに間隔を空けて配置されている。一方、右上側突起部３８及び右下側突起部３９は、後側開口部３４の図６における右側の開口縁３４ａよりも右側に、車両上下方向に互いに間隔を空けて配置されている。 The left upper protrusion 36 and the lower left protrusion 37 are arranged on the left side of the left opening edge 34a in FIG. 6 of the rear opening 34 at intervals in the vertical direction of the vehicle. On the other hand, the upper right protrusion 38 and the lower right protrusion 39 are arranged on the right side of the right opening edge 34a in FIG. 6 of the rear opening 34 at intervals in the vertical direction of the vehicle.

左上側突起部３６及び左下側突起部３７は、車両後方に延びている略直方体で、車両前後方向に対して垂直な断面は、車両前後方向に延びている長方形状である。当該断面は、左上側突起部３６よりも左下側突起部３７の方が大きい。右上側突起部３８及び右下側突起部３９についても、同様に形成されている。 The left upper protrusion 36 and the lower left protrusion 37 are substantially rectangular parallelepipeds extending rearward of the vehicle, and the cross section perpendicular to the front-rear direction of the vehicle is a rectangular shape extending in the front-rear direction of the vehicle. The cross section of the lower left protrusion 37 is larger than that of the upper left protrusion 36. The right upper protrusion 38 and the lower right protrusion 39 are similarly formed.

左上側突起部３６は、左上側突起部３６に対応する左上貫通孔１６に挿入される。同様に、左下側突起部３７、右上側突起部３８及び右下側突起部３９は、各突起部３７〜３９に対応する左下貫通孔１７、右上貫通孔１８及び右下貫通孔１９にそれぞれ挿入される。各突起部３６〜３９が、対応する各貫通孔１６〜１９に挿入された状態で、後側開口部３４と、フロントパネル１０のヘッドレスト設置部１５が接合されている。なお、図４及び図５では、１組の貫通孔１６〜１９に、１つのヘッドレストホルダ３０が取り付けられる状態を示している。 The left upper protrusion 36 is inserted into the upper left through hole 16 corresponding to the upper left protrusion 36. Similarly, the lower left protrusion 37, the upper right protrusion 38, and the lower right protrusion 39 are inserted into the lower left through hole 17, the upper right through hole 18, and the lower right through hole 19 corresponding to the respective protrusions 37 to 39, respectively. Will be done. The rear opening 34 and the headrest installation portion 15 of the front panel 10 are joined in a state where the protrusions 36 to 39 are inserted into the corresponding through holes 16 to 19. Note that FIGS. 4 and 5 show a state in which one headrest holder 30 is attached to one set of through holes 16 to 19.

詳細には、後側開口部３４の周縁部が、各貫通孔１６〜１９の周縁部に接合されている。また、Ｕ字形の開口を構成する後側開口部３４が、フロントパネル１０のヘッドレスト設置部１５によって塞がれている。これにより、閉断面構造が形成されている。 Specifically, the peripheral edge of the rear opening 34 is joined to the peripheral edge of each of the through holes 16-19. Further, the rear opening 34 forming the U-shaped opening is closed by the headrest installation portion 15 of the front panel 10. As a result, a closed cross-section structure is formed.

閉断面構造は、ヘッドレスト設置部１５の平坦部１５ａ、ヘッドレストホルダ３０の前壁３２ｃ、左側壁３２ａ及び右側壁３２ｂによって、形成されている。ヘッドレストホルダ３０が、図５に示すように、ヘッドレスト設置部１５に取り付けられている状態で、図１に示すように、上側開口部３３ａから、ヘッドレストガイド４５が挿入される。この例では、ヘッドレストガイド４５は、上側開口部３３ａから挿入され、下側開口部３３ｂから突出し、さらに、上側フランジ部１２の下方に形成された矩形孔１３（図３）を通り抜けるように配置されている。 The closed cross-sectional structure is formed by a flat portion 15a of the headrest installation portion 15, a front wall 32c of the headrest holder 30, a left side wall 32a and a right side wall 32b. With the headrest holder 30 attached to the headrest installation portion 15 as shown in FIG. 5, the headrest guide 45 is inserted from the upper opening 33a as shown in FIG. In this example, the headrest guide 45 is inserted through the upper opening 33a, protrudes from the lower opening 33b, and is arranged so as to pass through the rectangular hole 13 (FIG. 3) formed below the upper flange portion 12. ing.

ヘッドレストホルダ３０の前壁３２ｃ、左側壁３２ａ及び右側壁３２ｂと、ヘッドレスト設置部１５の平坦部１５ａは、ヘッドレストガイド４５が挿入される部分の壁部となる。すなわち、シートバックパネル１が、ヘッドレストガイド４５の挿通される一壁を担っている。 The front wall 32c, the left side wall 32a and the right side wall 32b of the headrest holder 30, and the flat portion 15a of the headrest installation portion 15 serve as a wall portion of a portion into which the headrest guide 45 is inserted. That is, the seat back panel 1 serves as a wall through which the headrest guide 45 is inserted.

ここで、ヘッドレストホルダ３０を、ヘッドレスト設置部１５に取り付ける方法について説明する。 Here, a method of attaching the headrest holder 30 to the headrest installation portion 15 will be described.

先ず、図３及び図４に示すように、左上側突起部３６、左下側突起部３７、右上側突起部３８及び右下側突起部３９を、これらの突起部３６〜３９に対応する左上貫通孔１６、左下貫通孔１７、右上貫通孔１８及び右下貫通孔１９に挿通させる。このとき、各突起部３６〜３９の一部は、フロントパネル１０の上側フランジ部１２の車両後面よりも車両後方に突出している。 First, as shown in FIGS. 3 and 4, the upper left protrusion 36, the lower left protrusion 37, the upper right protrusion 38, and the lower right protrusion 39 are penetrated through the upper left corresponding to these protrusions 36 to 39. It is inserted through the hole 16, the lower left through hole 17, the upper right through hole 18, and the lower right through hole 19. At this time, a part of each of the protrusions 36 to 39 protrudes to the rear of the vehicle from the rear surface of the upper flange portion 12 of the front panel 10.

上側フランジ部１２の車両後面よりも車両後方に突出している部分を、超音波かしめすることによって、図５、図８及び図９に示すように、当該突出している部分は、車両前方に潰されるように変形する。超音波かしめは、数十秒程度の短時間で、超音波によって樹脂を溶融させ、その後、冷却し固化させることで、樹脂材料の部材同士を固定する方法である。超音波かしめによって潰された部分は、車両上下方向及び車幅方向の広がる板状になって、貫通孔１６〜１９を塞ぎ、貫通孔１６〜１９の周縁に接合される。その結果、ヘッドレストホルダ３０は、ヘッドレスト設置部１５に固定される。 By ultrasonically caulking the portion of the upper flange portion 12 that protrudes rearward of the vehicle from the rear surface of the vehicle, the protruding portion is crushed forward of the vehicle as shown in FIGS. 5, 8 and 9. It transforms like this. Ultrasonic caulking is a method of fixing members of a resin material to each other by melting the resin by ultrasonic waves in a short time of about several tens of seconds, and then cooling and solidifying the resin. The portion crushed by the ultrasonic caulking forms a plate shape that expands in the vertical direction of the vehicle and the width direction of the vehicle, closes the through holes 16 to 19, and is joined to the peripheral edge of the through holes 16 to 19. As a result, the headrest holder 30 is fixed to the headrest installation portion 15.

樹脂材料により形成された部材同士を接着剤で接合する場合には、固化に時間を要することがあるが、本実施形態では、上記の通り、ヘッドレストホルダ３０と、シートバックパネル１のフロントパネル１０が、超音波かしめによって接合されているので、固化に必要な時間を抑制できる。その結果、シートバックパネル１の組立時間の短縮が可能となる。 When the members formed of the resin material are joined with an adhesive, it may take time to solidify. However, in the present embodiment, as described above, the headrest holder 30 and the front panel 10 of the seat back panel 1 However, since they are joined by ultrasonic caulking, the time required for solidification can be suppressed. As a result, the assembly time of the seat back panel 1 can be shortened.

また、例えば単独で閉断面構造を形成する筒状のブラケットを、フロントパネル１０に接合するような構造では、ブラケットとフロントパネル１０の接合部が、二層構造（２枚重ねの２重壁構造）となるため、その分だけ重量増加となる。これに対して、フロントパネル１０の上側フランジ部１２と、横断面がＵ字形状の開断面を有するヘッドレストホルダ３０によって、閉断面構造を形成しているため、接合部が二層構造（二重壁構造）にはならない。その結果、剛性を維持しつつ、軽量化が可能となる。 Further, for example, in a structure in which a tubular bracket that independently forms a closed cross-sectional structure is joined to the front panel 10, the joint portion between the bracket and the front panel 10 has a two-layer structure (two-layer double wall structure). ), So the weight will increase accordingly. On the other hand, since the upper flange portion 12 of the front panel 10 and the headrest holder 30 having an open cross section having a U-shaped cross section form a closed cross section structure, the joint portion has a two-layer structure (double). It does not become a wall structure). As a result, weight reduction is possible while maintaining rigidity.

例えば、シートバックパネル１の斜面等に複数の孔を形成するような場合には、シートバックパネル１の製造工程が煩雑になる。これに対して、本実施形態では、突起部３６〜３９が挿入されている貫通孔１６〜１９は、ヘッドレスト設置部１５の平坦部１５ａに設けられている。平坦部１５ａに貫通孔１６〜１９を形成するのは、比較的容易な製造工程なので、本実施形態の構造は、生産性向上に寄与する。 For example, when a plurality of holes are formed on the slope of the seat back panel 1, the manufacturing process of the seat back panel 1 becomes complicated. On the other hand, in the present embodiment, the through holes 16 to 19 into which the protrusions 36 to 39 are inserted are provided in the flat portion 15a of the headrest installation portion 15. Since it is a relatively easy manufacturing process to form the through holes 16 to 19 in the flat portion 15a, the structure of the present embodiment contributes to the improvement of productivity.

ヘッドレストホルダ３０の車両後部には、車幅方向に張り出している左後側フランジ部（フランジ部）３５ａ及び右後側フランジ部（フランジ部）３５ｂが設けられている。左後側フランジ部３５ａは、左側壁３２ａの車両後部で、図６における後側開口部３４の左側部から、左側に張り出している。詳細には、左後側フランジ部３５ａにおける後側開口部３４の車幅方向開口中心側の端（右端）は、開口縁３４ａとなり、反対側の端（後側開口部３４から離れる方の端）は、左側壁３２ａよりも後側開口部３４から離れる方向に張り出している。 The rear portion of the headrest holder 30 is provided with a left rear flange portion (flange portion) 35a and a right rear flange portion (flange portion) 35b overhanging in the vehicle width direction. The left rear flange portion 35a is the rear portion of the vehicle on the left side wall 32a, and projects to the left from the left portion of the rear opening 34 in FIG. Specifically, the end (right end) of the rear opening 34 on the left rear flange portion 35a on the vehicle width direction opening center side becomes the opening edge 34a, and the opposite end (the end away from the rear opening 34). ) Projects away from the rear opening 34 with respect to the left side wall 32a.

同様に、右後側フランジ部３５ｂは、右側壁３２ｂの車両後部で、図６における後側開口部３４の右側部から、右側に張り出している。詳細には、右後側フランジ部３５ｂにおける後側開口部３４の左端は、開口縁３４ａとなり、右端は、右側壁３２ｂよりも後側開口部３４から離れる方向に張り出している。左後側フランジ部３５ａ及び右後側フランジ部３５ｂの車幅方向幅の長さは、ヘッドレストホルダ３０の板厚よりも大きい。すなわち、前壁３２ｃ、左側壁３２ａ及び右側壁３２ｂの厚さよりも大きい。 Similarly, the right rear flange portion 35b is the rear portion of the vehicle on the right side wall 32b and projects to the right from the right portion of the rear opening 34 in FIG. Specifically, the left end of the rear opening 34 in the right rear flange 35b is the opening edge 34a, and the right end projects in a direction away from the rear opening 34 than the right wall 32b. The length of the left rear flange portion 35a and the right rear flange portion 35b in the vehicle width direction is larger than the plate thickness of the headrest holder 30. That is, it is larger than the thickness of the front wall 32c, the left side wall 32a, and the right side wall 32b.

左後側フランジ部３５ａ及び右後側フランジ部３５ｂを設けない場合に比べ、ヘッドレストホルダ３０とシートバックパネル１との接触面積を大きくすることができる。そのため、ヘッドレスト４０に荷重がかかった際に、左後側フランジ部３５ａ及び右後側フランジ部３５ｂによって荷重を分散できる。その結果、ヘッドレストホルダ３０の破損を抑制することが可能となる。 The contact area between the headrest holder 30 and the seat back panel 1 can be increased as compared with the case where the left rear flange portion 35a and the right rear flange portion 35b are not provided. Therefore, when a load is applied to the headrest 40, the load can be distributed by the left rear flange portion 35a and the right rear flange portion 35b. As a result, it is possible to suppress damage to the headrest holder 30.

また、図４及び図６に示すように、左下側突起部３７の断面積は、左上側突起部３６の断面積よりも大きい。ここで、断面積とは、左下側突起部３７及び左上側突起部３６の突出方向（車両前後方向）に対して垂直な断面の面積である。この場合、左下側突起部３７及び左上側突起部３６のそれぞれの先端面（後面）の面積とほぼ同じである。同様に、右下側突起部３９の断面積は、右上側突起部３８の断面積よりも大きい。 Further, as shown in FIGS. 4 and 6, the cross-sectional area of the lower left protrusion 37 is larger than the cross-sectional area of the upper left protrusion 36. Here, the cross-sectional area is the area of the cross section perpendicular to the protrusion direction (vehicle front-rear direction) of the lower left protrusion 37 and the upper left protrusion 36. In this case, the area is substantially the same as the area of the tip surface (rear surface) of each of the lower left protrusion 37 and the upper left protrusion 36. Similarly, the cross-sectional area of the lower right protrusion 39 is larger than the cross-sectional area of the upper right protrusion 38.

ヘッドレスト４０に荷重が作用する場合、ヘッドレストホルダ３０の下部には、上部より大きい荷重が作用することになる。ヘッドレストホルダ３０の左下側突起部３７及び右下側突起部３９の断面積を大きくすることにより、ヘッドレスト４０に大きな荷重が作用した場合でも、ヘッドレストホルダ３０や超音波かしめの接合部分の破損を抑制することができる。 When a load acts on the headrest 40, a load larger than the upper part acts on the lower part of the headrest holder 30. By increasing the cross-sectional area of the lower left protrusion 37 and the lower right protrusion 39 of the headrest holder 30, damage to the headrest holder 30 and the joint portion of the ultrasonic caulking is suppressed even when a large load is applied to the headrest 40. can do.

また、上側突起部３６，３８と下側突起部３７，３９を異なる形状にすることにより、車両上下方向に対して逆さまに誤組付けされることを防止でき、組立時間の短縮にも寄与する。 Further, by making the upper protrusions 36 and 38 and the lower protrusions 37 and 39 different in shape, it is possible to prevent the vehicle from being erroneously assembled upside down in the vertical direction of the vehicle, which also contributes to shortening the assembly time. ..

例えば、上側突起部３６，３８と下側突起部３７，３９を連結して、車両上下方向に延びている１つの突起部とするような場合、挿入される貫通孔の車両上下方向長さが長くなり、上側フランジ部１２の強度の低下を招く可能性がある。また、車両上下方向に延びている突起部の場合、超音波かしめの作業時間が長くなる可能性がある。本実施形態にように、上側突起部３６，３８と下側突起部３７，３９を設けることによって、上記のような問題を防止できる。 For example, when the upper protrusions 36, 38 and the lower protrusions 37, 39 are connected to form one protrusion extending in the vehicle vertical direction, the length of the through hole to be inserted in the vehicle vertical direction is It becomes long and may cause a decrease in the strength of the upper flange portion 12. Further, in the case of a protrusion extending in the vertical direction of the vehicle, the working time of ultrasonic caulking may be long. By providing the upper protrusions 36, 38 and the lower protrusions 37, 39 as in the present embodiment, the above-mentioned problems can be prevented.

本実施形態のヘッドレストホルダ３０の下部は、上部に比べ厚肉である。詳細には、ヘッドレストホルダ３０の前壁３２ｃの下部における車両前部、及び左側壁３２ａ及び右側壁３２ｂの下部における外側には、前壁３２ｃ、左側壁３２ａ及び右側壁３２ｂを取り囲むように形成された突出部３２ｄが設けられている。 The lower portion of the headrest holder 30 of the present embodiment is thicker than the upper portion. Specifically, the front part of the vehicle at the lower part of the front wall 32c of the headrest holder 30, and the outer side at the lower part of the left side wall 32a and the right side wall 32b are formed so as to surround the front wall 32c, the left side wall 32a and the right side wall 32b. A protruding portion 32d is provided.

突出部３２ｄの車両前部は、左後側フランジ部３５ａ及び右後側フランジ部３５ｂに連続するように接続されている。また、突出部３２ｄは、前壁３２ｃ、左側壁３２ａ及び右側壁３２ｂに一体的に形成されている。 The vehicle front portion of the protruding portion 32d is connected to the left rear flange portion 35a and the right rear flange portion 35b so as to be continuous with each other. Further, the protruding portion 32d is integrally formed with the front wall 32c, the left side wall 32a and the right side wall 32b.

ヘッドレスト４０に荷重が作用する場合、ヘッドレストホルダ３０には下部に、より大きな荷重が作用する。ヘッドレストホルダ３０の下部に、肉厚の部位となる突出部３２ｄを設けて断面積を大きくすることにより、ヘッドレスト４０に大きな荷重が作用した場合にも、ヘッドレストホルダ３０や超音波かしめの接合部分の破損を抑制することができる。 When a load acts on the headrest 40, a larger load acts on the lower part of the headrest holder 30. By providing a protruding portion 32d, which is a thick portion, at the lower part of the headrest holder 30 to increase the cross-sectional area, even when a large load is applied to the headrest 40, the joint portion of the headrest holder 30 and the ultrasonic caulking portion. Damage can be suppressed.

左下側突起部３７の下端は、前記ヘッドレストホルダ３０の左側壁３２ａの下端よりも、車両上方に配置されている。同様に、右下側突起部３９の下端は、右側壁３２ｂの下端よりも、車両上方に配置されている。図８（ａ）に示すように、側壁３２ａ，３２ｂの下部に、平坦な棚３５ｄが設けられている。 The lower end of the lower left protrusion 37 is arranged above the lower end of the left side wall 32a of the headrest holder 30. Similarly, the lower end of the lower right projection 39 is arranged above the vehicle with respect to the lower end of the right wall 32b. As shown in FIG. 8A, a flat shelf 35d is provided below the side walls 32a and 32b.

図８（ｂ）に示すように、仮に棚３５ｄを設けない場合には、ヘッドレストホルダ３０を、ヘッドレスト設置部１５に超音波かしめするときに、ヘッドレスト設置部１５の貫通孔１７，１９から、ヘッドレストガイド４５を挿入する空間（閉断面構造の内側）に、バリ５０が入り込むことがある。このような場合、ヘッドレストホルダ３０の閉断面構造の内部に、ヘッドレストガイド４５を組み付けにくくなるので、バリ取りをする必要がある。その結果、ヘッドレストガイド４５の組付けに時間がかかり、シートバックパネル１の組立て時間が長くなってしまう。 As shown in FIG. 8B, if the shelf 35d is not provided, when the headrest holder 30 is ultrasonically crimped to the headrest installation portion 15, the headrest is formed through the through holes 17 and 19 of the headrest installation portion 15. The burr 50 may enter the space (inside the closed cross-sectional structure) into which the guide 45 is inserted. In such a case, it becomes difficult to assemble the headrest guide 45 inside the closed cross-sectional structure of the headrest holder 30, so it is necessary to deburr. As a result, it takes time to assemble the headrest guide 45, and the assembly time of the seat back panel 1 becomes long.

これに対して、本実施形態では、図８（ａ）に示すように、側壁３２ａ，３２ｂの下端よりも、下側突起部３７，３９の下端を車両上方に配置して、平坦な棚３５ｄを設けることで、棚３５ｄを、貫通孔１７，１９の縁部に加圧しながら当接させることができる。これにより、バリが閉断面構造の内側に入り込むことを抑制できるため、バリ取りをする必要がなくなる。その結果、シートバックパネル１の組立て時間を短縮できる。 On the other hand, in the present embodiment, as shown in FIG. 8A, the lower ends of the lower protrusions 37 and 39 are arranged above the lower ends of the side walls 32a and 32b, and the flat shelf 35d is arranged. By providing the shelf 35d, the shelf 35d can be brought into contact with the edges of the through holes 17 and 19 while applying pressure. As a result, it is possible to prevent burrs from entering the inside of the closed cross-section structure, so that it is not necessary to deburr. As a result, the assembly time of the seat back panel 1 can be shortened.

また、本実施形態では、図９（ａ）に示すように、左上側突起部３６における後側開口部３４の開口中心側の端部は、後側開口部３４の左側の開口縁３４ａに対して車幅方向に間隔を空けて配置されている。左下側突起部３７についても同様に、配置されている。また、右上側突起部３８及び右下側突起部３９のそれぞれにおける後側開口部３４側の端部は、後側開口部３４の右側の開口縁３４ａに対して車幅方向に間隔を空けて配置されている。このように構成することで、開口縁３４ａと突起部３６〜３９との間にも平坦な棚３５ｃを設けている。 Further, in the present embodiment, as shown in FIG. 9A, the end portion of the upper left projection portion 36 on the opening center side of the rear opening 34 is relative to the left opening edge 34a of the rear opening 34. They are arranged at intervals in the vehicle width direction. The lower left protrusion 37 is also arranged in the same manner. Further, the ends of the upper right protrusion 38 and the lower right protrusion 39 on the rear opening 34 side are spaced apart from the right opening edge 34a of the rear opening 34 in the vehicle width direction. Have been placed. With this configuration, a flat shelf 35c is also provided between the opening edge 34a and the protrusions 36 to 39.

側壁３２ａ，３２ｂの下端と同様に、図９（ｂ）に示すように、棚３５ｃを設けない場合には、ヘッドレストホルダ３０を、ヘッドレスト設置部１５に超音波かしめするときに、ヘッドレスト設置部１５の貫通孔１６〜１９から、閉断面構造の内側に、バリ５０が入り込むことがある。 Similar to the lower ends of the side walls 32a and 32b, as shown in FIG. 9B, when the shelf 35c is not provided, the headrest holder 30 is ultrasonically crimped to the headrest installation portion 15, and the headrest installation portion 15 is used. The burr 50 may enter the inside of the closed cross-sectional structure from the through holes 16 to 19 of the above.

これに対して、開口縁３４ａと突起部３６〜３９との間に棚３５ｃを設けることによって、下端に棚３５ｄを設ける形状と同様の効果を得ることができる。また、ヘッドレスト４０に荷重が作用した場合、後側開口部３４の左右の棚３５ｃによって、当該荷重の一部を支持することができる。その結果、特に車両左右への繰り返しの捻じりや荷重が作用した場合に、ヘッドレストホルダ３０や超音波かしめの接合部分の破損を抑制することができる。 On the other hand, by providing the shelf 35c between the opening edge 34a and the protrusions 36 to 39, the same effect as the shape in which the shelf 35d is provided at the lower end can be obtained. Further, when a load acts on the headrest 40, a part of the load can be supported by the left and right shelves 35c of the rear opening 34. As a result, it is possible to suppress damage to the headrest holder 30 and the joint portion of the ultrasonic caulking, particularly when repeated twisting or load is applied to the left and right sides of the vehicle.

また、シートバックパネル１をＣＦＲＰによって形成しているので、ヘッドレストホルダ３０の各突起部３６〜３９が挿入される各貫通孔１６〜１９の回りの板厚を含め、パネル全体の板厚を薄くすることが可能となり、フロントパネル１０の軽量化に寄与する。 Further, since the seat back panel 1 is formed of CFRP, the thickness of the entire panel is reduced, including the thickness around the through holes 16 to 19 into which the protrusions 36 to 39 of the headrest holder 30 are inserted. This makes it possible to reduce the weight of the front panel 10.

例えば、フロントパネル１０のヘッドレスト設置部１５に屈曲部を有するような形状を、ＣＦＲＰによって形成する場合においては、例えばＣＦＲＰのスタンピング成形では長繊維が崩れる可能性があり、また、ＣＦＲＰの射出成形では屈曲部に長繊維が入り込まない可能性がある。その結果、形状の成形に起因するヘッドレストガイド４５が挿入される部分の強度が低下する可能性がある。 For example, when CFRP is used to form a shape such that the headrest installation portion 15 of the front panel 10 has a bent portion, for example, in CFRP stamping molding, long fibers may collapse, and in CFRP injection molding. There is a possibility that the long fibers do not enter the bent part. As a result, the strength of the portion into which the headrest guide 45 is inserted due to the molding of the shape may decrease.

これに対して、本実施形態では、フロントパネル１０の貫通孔１６〜１９にヘッドレストホルダ３０の突起部３６〜３９を挿入する構造であるため、フロントパネル１０のヘッドレスト設置部１５の挿入部位はほぼ平滑な形状でよく、複雑形状にする必要がない。そのため、シートバックパネル１のフロントパネル１０を、ＣＦＲＰで形成した場合においても、長繊維の等方性が崩れることや、長繊維が入り込まないことによる、ヘッドレストガイド４５の挿入部の強度が低下することを抑制することが可能となる。 On the other hand, in the present embodiment, since the protrusions 36 to 39 of the headrest holder 30 are inserted into the through holes 16 to 19 of the front panel 10, the insertion portion of the headrest installation portion 15 of the front panel 10 is almost the same. It may have a smooth shape and does not need to have a complicated shape. Therefore, even when the front panel 10 of the seat back panel 1 is formed of CFRP, the isotropic properties of the long fibers are disrupted and the strength of the insertion portion of the headrest guide 45 is reduced due to the fact that the long fibers do not enter. It becomes possible to suppress this.

本実施形態の説明は、本発明を説明するための例示であって、特許請求の範囲に記載の発明を限定するものではない。また、本発明の各部構成は上記実施形態に限らず、特許請求の範囲に記載の技術的範囲内で種々の変形が可能である。 The description of the present embodiment is an example for explaining the present invention, and does not limit the invention described in the claims. Further, each part configuration of the present invention is not limited to the above embodiment, and various modifications can be made within the technical scope described in the claims.

上記実施形態では、突起部３６〜３９を、略直方体としているがこれに限らない。例えば、円柱でもよいし、断面が車両上下方向に延びる楕円形とてもよい。 In the above embodiment, the protrusions 36 to 39 are substantially rectangular parallelepipeds, but the present invention is not limited to this. For example, it may be a cylinder, or an ellipse having a cross section extending in the vertical direction of the vehicle.

１ シートバックパネル
２ リトラクタ収容部
１０ フロントパネル
１１ フランジ部
１２ 上側フランジ部
１５ ヘッドレスト設置部
１５ａ 平坦部
１６ 左上貫通孔
１７ 左下貫通孔
１８ 右上貫通孔
１９ 右下貫通孔
２０ リヤパネル
３０ ヘッドレストホルダ
３２ａ 左側壁
３２ｂ 右側壁
３２ｃ 前壁
３２ｄ 突出部
３３ａ 上側開口部
３３ｂ 下側開口部
３４ 後側開口部
３４ａ 開口縁
３５ａ 左後側フランジ部（フランジ部）
３５ｂ 右後側フランジ部（フランジ部）
３５ｃ 棚
３５ｄ 棚
３６ 左上側突起部
３７ 左下側突起部
３８ 右上側突起部
３９ 右下側突起部
４０ ヘッドレスト
４１ ステー
４５ ヘッドレストガイド
５０ バリ 1 Seat back panel 2 Retractor accommodating part 10 Front panel 11 Flange part 12 Upper flange part 15 Headrest installation part 15a Flat part 16 Upper left through hole 17 Lower left through hole 18 Upper right through hole 19 Lower right through hole 20 Rear panel 30 Headrest holder 32a Left side wall 32b Right side wall 32c Front wall 32d Protruding part 33a Upper opening 33b Lower opening 34 Rear opening 34a Opening edge 35a Left rear flange (flange part)
35b Right rear flange part (flange part)
35c Shelf 35d Shelf 36 Left upper protrusion 37 Left lower protrusion 38 Right upper protrusion 39 Right lower protrusion 40 Headrest 41 Stay 45 Headrest guide 50 Bali

Claims (7)

樹脂製のシートバックパネルの上部に、ヘッドレストガイドを介してヘッドレストを支持するための樹脂製のヘッドレストホルダが取り付けられている、車両用シートバック構造において、
前記ヘッドレストホルダの上部には、前記ヘッドレストガイドが挿入される上側開口部が設けられ、
前記ヘッドレストホルダの車両後部には、車両上下方向に延びている後側開口部が設けられ、該後側開口部の車幅方向両側部のそれぞれには、車両後方に突出している少なくとも１つの突起部が設けられ、
前記シートバックパネルの上部には、前記突起部が挿入されている貫通孔が形成され、
前記後側開口部の車幅方向両側部と、前記貫通孔の周縁部が接合されることにより、内側に前記ヘッドレストガイドが配置される閉断面構造が形成されていることを特徴とする車両用シートバック構造。 In a vehicle seatback structure in which a resin headrest holder for supporting the headrest is attached to the upper part of the resin seatback panel via a headrest guide.
An upper opening into which the headrest guide is inserted is provided in the upper part of the headrest holder.
A rear opening extending in the vertical direction of the vehicle is provided at the rear portion of the headrest holder, and at least one protrusion protruding rearward of the vehicle is provided on each of both sides of the rear opening in the vehicle width direction. The part is provided,
A through hole into which the protrusion is inserted is formed in the upper part of the seat back panel.
For vehicles characterized in that a closed cross-sectional structure in which the headrest guide is arranged is formed by joining both sides of the rear opening in the vehicle width direction and the peripheral edge of the through hole. Seat back structure. 前記シートバックパネルの上部には、車幅方向に延びている平坦部が設けられ、
前記貫通孔は、前記平坦部に形成されていることを特徴とする請求項１に記載の車両用シートバック構造。 A flat portion extending in the vehicle width direction is provided on the upper portion of the seat back panel.
The vehicle seat back structure according to claim 1, wherein the through hole is formed in the flat portion. 前記後側開口部の車幅方向両側部には、フランジ部が設けられ、前記突起部は、前記フランジ部に配置され、
前記フランジ部の車幅方向幅は、前記ヘッドレストホルダの板厚よりも大きいことを特徴とする請求項１または請求項２に記載の車両用シートバック構造。 Flange portions are provided on both sides of the rear opening in the vehicle width direction, and the protrusions are arranged on the flange portion.
The vehicle seat back structure according to claim 1 or 2, wherein the width of the flange portion in the vehicle width direction is larger than the plate thickness of the headrest holder. 前記突起部は、上側突起部と、下側突起部を有しており、
前記上側突起部と下側突起部は、車両上下方向に間隔を空けて配置され、
前記下側突起部の断面積は、前記上側突起部の断面積より大きいことを特徴とする請求項１ないし請求項３のいずれか一項に記載の車両用シートバック構造。 The protrusion has an upper protrusion and a lower protrusion.
The upper protrusion and the lower protrusion are arranged at intervals in the vertical direction of the vehicle.
The vehicle seat back structure according to any one of claims 1 to 3, wherein the cross-sectional area of the lower protrusion is larger than the cross-sectional area of the upper protrusion. 前記ヘッドレストホルダの前記閉断面構造の下部は、上部に比べ厚肉であることを特徴とする請求項１ないし請求項４のいずれか一項に記載の車両用シートバック構造。 The vehicle seat back structure according to any one of claims 1 to 4, wherein the lower portion of the closed cross-sectional structure of the headrest holder is thicker than the upper portion. 前記突起部の下端は、前記ヘッドレストホルダの下端よりも車両上方に配置されていることを特徴とする請求項３ないし請求項５のいずれか一項に記載の車両用シートバック構造。 The vehicle seat back structure according to any one of claims 3 to 5, wherein the lower end of the protrusion is arranged above the lower end of the headrest holder. 前記突起部における前記後側開口部に近い方の端部は、前記後側開口部の開口縁に対して車幅方向間隔を空けて配置されていることを特徴とする請求項３ないし請求項６のいずれか一項に記載の車両用シートバック構造。 Claims 3 to 3, wherein the end portion of the protrusion closer to the rear opening is arranged at a distance in the vehicle width direction with respect to the opening edge of the rear opening. The vehicle seat back structure according to any one of 6.
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JP2017052977A JP6819939B2 (en) 2017-03-17 2017-03-17 Vehicle seat back structure
DE102018101756.1A DE102018101756B4 (en) 2017-03-17 2018-01-26 vehicle seat back structure
FR1850858A FR3063940B1 (en) 2017-03-17 2018-02-01 VEHICLE SEAT BACKREST STRUCTURE
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JP2730288B2 (en) * 1990-11-02 1998-03-25 日産自動車株式会社 Rear seat headrest mounting structure
JP4075452B2 (en) * 2002-05-16 2008-04-16 トヨタ紡織株式会社 Headrest device
JP4815111B2 (en) * 2004-08-19 2011-11-16 日本発條株式会社 Vehicle seat
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DE202010007559U1 (en) 2010-06-02 2011-06-09 Prevent TWB GmbH & Co. KG, 58089 Device for holding a component having a holding rod
JP5685026B2 (en) * 2010-07-30 2015-03-18 日本テクニカ株式会社 Headrest bracket support structure
DE102011115714B4 (en) 2011-08-24 2023-05-17 Adient Us Llc Connection element of the headrest rods to a seat structure
US20150210194A1 (en) * 2012-08-09 2015-07-30 Ts Tech Co., Ltd. Vehicle seat
JP2015003674A (en) 2013-06-21 2015-01-08 トヨタ自動車株式会社 Bracket fixing structure of seat back frame
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JP2016097806A (en) * 2014-11-21 2016-05-30 株式会社タチエス Seat and manufacturing method of headrest bracket
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