JP2013103528A - Mounting structure of seat for vehicle - Google Patents

Mounting structure of seat for vehicle Download PDF

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Publication number
JP2013103528A
JP2013103528A JP2011246694A JP2011246694A JP2013103528A JP 2013103528 A JP2013103528 A JP 2013103528A JP 2011246694 A JP2011246694 A JP 2011246694A JP 2011246694 A JP2011246694 A JP 2011246694A JP 2013103528 A JP2013103528 A JP 2013103528A
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Prior art keywords
floor tunnel
seat
floor
vehicle
mounting bracket
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JP2011246694A
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JP5862214B2 (en
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Taku Sumino
卓 角野
Yoshimune Kurigami
義崇 操上
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Suzuki Motor Corp
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Suzuki Motor Corp
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Priority to JP2011246694A priority Critical patent/JP5862214B2/en
Priority to CN201210422967.XA priority patent/CN103112371B/en
Priority to DE201210021966 priority patent/DE102012021966B4/en
Publication of JP2013103528A publication Critical patent/JP2013103528A/en
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Publication of JP5862214B2 publication Critical patent/JP5862214B2/en
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    • 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
    • B60N2/005—Arrangement or mounting of seats in vehicles, e.g. dismountable auxiliary seats
    • B60N2/015—Attaching seats directly to vehicle chassis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/20—Floors or bottom sub-units
    • B62D25/2009—Floors or bottom sub-units in connection with other superstructure subunits
    • B62D25/2036—Floors or bottom sub-units in connection with other superstructure subunits the subunits being side panels, sills or pillars

Abstract

PROBLEM TO BE SOLVED: To provide the mounting structure of a seat for a vehicle, which can enlarge a residential space and improve rigidity of a floor tunnel part, to which a seat mounting bracket is to be fitted, and can relax the concentration of stress by effectively distributing a load.SOLUTION: A rear seat mounting bracket 9C of a seat for a vehicle includes: a seat support surface 10 projecting outside on a side from a top surface 3a of a floor tunnel part 3; and a side part 11 to be fitted to a side surface part 3b of the floor tunnel part. The side part 11 is formed with a hollow part 12 on a lower side of the projecting part of the seat support surface, and a pair of leg parts 11b provided on both sides of a notch part 11a are formed to be widen downward on both sides. The both side leg parts 11b of the notch part 11a and the seat support surface 10 are fitted to a side surface part 3b and the top surface 3a of the floor tunnel part 3. A floor tunnel reinforcing member for reinforcing the inside of the floor tunnel part 3 is bonded to the vehicle body floor 2 in a part, wherein a floor panel 5 and the floor tunnel part 3 are overlapped with each other, through the hollow part 12.

Description

本発明は、小型車両の居住空間の拡大を図り、かつ車両用シートの後端部車室内側を固定するためのシート取付ブラケットを取り付けるフロアトンネル部の剛性の向上を図るとともに、荷重を効果的に分散して応力集中の緩和を図ることができる車両用シートの取付構造に関する。   The present invention aims to increase the rigidity of a floor tunnel portion for mounting a seat mounting bracket for fixing a rear end portion of a vehicle seat and a vehicle interior side in order to expand a living space of a small vehicle and to effectively apply a load. It is related with the attachment structure of the vehicle seat which can aim at relaxation of stress concentration.

自動車等の車両用シートは、シートベルトと協働して搭乗者を拘束し、通常運転時の搭乗者の姿勢を確保するとともに、車体の前後、側方から加わる衝撃荷重に対して搭乗者を支えることが求められる。
小型車両においては、限られた車幅で車室内の居住空間を確保することが要求されている。また、車室内では、車両用シートが、車体の前後方向に設けられた、車幅方向左右一対のレール上に配置されており、これら一対のレールの車幅方向の距離を長くすることによって、シートの取付安定性を高めることが要求されている。さらに、シートには特に車両前方側斜め上方に向かう力が大きく加えられるので、このような力に対してシート取付部及びその周辺の取付剛性を高めることが要求されている。 Vehicle seats for automobiles, etc. restrain passengers in cooperation with seat belts to ensure the posture of the passengers during normal operation and to prevent the passengers from being subjected to impact loads applied from the front, rear, and side of the vehicle body. Support is required.
In small vehicles, it is required to secure a living space in a vehicle compartment with a limited vehicle width. Further, in the passenger compartment, the vehicle seat is disposed on a pair of left and right rails in the vehicle width direction provided in the longitudinal direction of the vehicle body, and by increasing the distance in the vehicle width direction of the pair of rails, It is required to improve the mounting stability of the seat. Furthermore, since a large force is applied to the seat, particularly in the obliquely upward direction on the front side of the vehicle, it is required to increase the mounting rigidity of the seat mounting portion and its periphery against such a force.

これらの要求に応ずるために、車幅方向中央側のレールの取付部を、車両フロアの車幅方向中央部に、車体前後方向に配設されたフロアトンネルに設けることが行われている。この構造では、車幅を広げず、かつ車室内の居住空間を犠牲にせずに、一対のレール同士の距離を長くすることができる。そのため、車幅を広げず、車室内の居住空間を確保でき、かつシートの取付安定性を高めることができる。また、レールの取付部が、剛性の高いフロアトンネルに設けられているので、シートの取付部及びその周辺の剛性を高めることができる。   In order to meet these requirements, a rail mounting portion on the center side in the vehicle width direction is provided in a floor tunnel disposed in the vehicle longitudinal direction in the vehicle width direction center portion of the vehicle floor. In this structure, the distance between the pair of rails can be increased without increasing the vehicle width and without sacrificing the living space in the vehicle interior. Therefore, it is possible to secure a living space in the passenger compartment without increasing the width of the vehicle, and to improve seat mounting stability. In addition, since the rail attachment portion is provided in the floor tunnel having high rigidity, the rigidity of the seat attachment portion and its periphery can be increased.

このような構造の一例として、特許文献１では、フロアトンネルが断面ハット形状に形成され、車幅方向中央側のレールを取り付ける２つのレール取付ブラケットが、断面Ｌ字形状または断面ハット形状に形成されており、車両前後方向に間隔を空けて配置され、かつフロアトンネルの上部または側部に取り付けられている。   As an example of such a structure, in Patent Document 1, a floor tunnel is formed in a cross-sectional hat shape, and two rail mounting brackets for attaching a rail on the center side in the vehicle width direction are formed in an L-shaped cross section or a cross-sectional hat shape. It is arranged at intervals in the vehicle front-rear direction and is attached to the upper part or side part of the floor tunnel.

さらなる一例として、特許文献２では、フロアトンネルが断面ハット形状に形成され、このフロアトンネルに対応して断面ハット形状に形成された補強部材がフロアトンネルの上方から重ねて配置されている。この補強部材にシート取付ブラケットが取付けられており、このシート取付ブラケットの上部が補強部材の上部に沿って配置され、シート取付ブラケットの側部が補強部材の側部に沿って配置されている。シート取付ブラケットの側部は、フロアトンネルの側部と一緒に閉じ空間を形成するように車幅方向外側に突出し、かつ車幅方向中央側のレールを取り付けるように構成されている。   As a further example, in Patent Document 2, a floor tunnel is formed in a cross-sectional hat shape, and a reinforcing member formed in a cross-sectional hat shape corresponding to the floor tunnel is arranged so as to overlap from above the floor tunnel. A seat mounting bracket is attached to the reinforcing member, an upper portion of the seat mounting bracket is disposed along the upper portion of the reinforcing member, and a side portion of the seat mounting bracket is disposed along a side portion of the reinforcing member. The side portion of the seat mounting bracket projects outward in the vehicle width direction so as to form a closed space together with the side portion of the floor tunnel, and is configured to attach a rail on the center side in the vehicle width direction.

特開２００１−３４１５６７号公報JP 2001-341567 A 特開平７−１６５１２５号公報JP 7-165125 A

しかしながら、特許文献１の構造では、断面Ｌ字形状または断面ハット形状の２つのレール取付ブラケットが、車両前後方向に間隔を空けてフロアトンネルに取り付けられているに過ぎない。そのため、シートに加わる車両前方側斜め上方に向かう力に対して、レールの取付強度が十分でなく、シートの取付部およびその周辺の剛性を高めることができない。
特に、評価荷重と呼ばれるシート上部にかかる左右の斜め下方向の荷重は、中央側のシート取付ブラケットには、上下方向の荷重として加わる。この荷重により、フロアトンネルの変形とともに近傍のフロアの変形が起こる。この変形は大きな荷重では座屈変形によるシートの姿勢変化となる。また、小さな荷重では運転時の車体振動の原因となり、搭乗者への振動や室内騒音となり好ましくない。 However, in the structure of Patent Document 1, the two rail mounting brackets having an L-shaped cross section or a hat-shaped cross section are merely attached to the floor tunnel with a space in the vehicle front-rear direction. Therefore, the mounting strength of the rail is not sufficient with respect to the force applied to the seat obliquely upward on the front side of the vehicle, and the rigidity of the seat mounting portion and its periphery cannot be increased.
In particular, left and right diagonally downward loads on the upper portion of the seat, called evaluation loads, are applied to the central seat mounting bracket as vertical loads. This load causes deformation of the nearby floor as well as deformation of the floor tunnel. This deformation causes a change in seat posture due to buckling deformation under a large load. In addition, a small load causes vehicle body vibration during driving, which is undesirable because it causes vibration to passengers and room noise.

一方、特許文献２の構造では、フロアトンネルの断面ハット形状、あるいは板厚の増加や補強部材の追加などでフロアトンネルの剛性を向上して変形を低減するものであるため、重量の増加、部品点数の増加を招きコスト増となる問題がある。また、フロアトンネルの側部に荷重を分散すると、フロアトンネルの上部の変形はある程度低減できる一方、フロアトンネルの下部を上下方向に押し／引きするので、荷重吸収のためにはフロアトンネルの下部の剛性を確保することが望ましくなる。フロアトンネルの下部の剛性確保は車体全体の剛性に寄与するので、局所的な変形をおこさないことが望ましい。
また、特許文献２の構造では、シート取付ブラケットを補強部材に取り付けた状態で、この組立体を電着塗装する場合、シート取付ブラケットの側部とフロアトンネルの側部とにより形成された閉じ空間に、電着塗装液が残留する。この残留した液体を電着塗装工程中に取り除くことは難しく、電着塗装工程の後工程にて、閉じ空間内に残留した液体が補強部材の塗装面に垂れる「液ダレ」が発生する恐れがある。この場合、補強部材の塗装面の塗装品質が低下することとなる。 On the other hand, in the structure of Patent Document 2, the cross-sectional hat shape of the floor tunnel, or the rigidity of the floor tunnel is improved by reducing the deformation by increasing the plate thickness or adding a reinforcing member. There is a problem that the cost increases due to an increase in the number of points. In addition, if the load is distributed to the side of the floor tunnel, the deformation of the upper part of the floor tunnel can be reduced to some extent, while the lower part of the floor tunnel is pushed / pulled in the vertical direction. It is desirable to ensure rigidity. Since securing the rigidity of the lower part of the floor tunnel contributes to the rigidity of the entire vehicle body, it is desirable not to cause local deformation.
Further, in the structure of Patent Document 2, when this assembly is electrodeposited with the seat mounting bracket attached to the reinforcing member, a closed space formed by the side portion of the seat mounting bracket and the side portion of the floor tunnel. In addition, the electrodeposition coating liquid remains. It is difficult to remove the remaining liquid during the electrodeposition coating process, and there is a risk of “liquid dripping” in which the liquid remaining in the closed space hangs down on the painted surface of the reinforcing member in the subsequent process of the electrodeposition coating process. is there. In this case, the coating quality of the painted surface of the reinforcing member is deteriorated.

特許文献２の構造では、シート取付ブラケットの側部が車幅方向外側に突出しており、このようなシート取付ブラケットの側部と補強部材の側部とによって閉じ空間が形成されているので、シート取付ブラケットと補強部材とを予め組み立てた状態で、上下への重ね合わせができず、輸送コストの増加や、生産精度が損なわれる恐れがある。   In the structure of Patent Document 2, the side portion of the seat mounting bracket protrudes outward in the vehicle width direction, and a closed space is formed by the side portion of the seat mounting bracket and the side portion of the reinforcing member. In a state where the mounting bracket and the reinforcing member are assembled in advance, the upper and lower portions cannot be superposed, which may increase the transportation cost and impair production accuracy.

本発明は、小型車両の居住空間の拡大を図り、かつ車両用シートの後端部車室内側を固定するためのシート取付ブラケットを取り付けるフロアトンネル部の剛性の向上を図るとともに、荷重を効果的に分散して応力集中の緩和を図ることができる車両用シートの取付構造を提供することを目的とする。   The present invention aims to increase the rigidity of a floor tunnel portion for mounting a seat mounting bracket for fixing a rear end portion of a vehicle seat and a vehicle interior side in order to expand a living space of a small vehicle and to effectively apply a load. It is an object of the present invention to provide a vehicle seat mounting structure which can be dispersed in a stress concentration relief.

本発明は、上記課題を解決するため、車体フロアの車幅方向中央部に車体の前後方向に形成されたフロアトンネル部の両側に配設される車両用シートを、該車両用シートに設けられた左右のシートレール組立体をそれぞれ前後のシート取付ブラケットを介して車体フロアに取り付けるようにした車両用シートの取付構造であって、前記シート取付ブラケットのうち車両用シートの後部室内側を支持する後部シート取付ブラケットを、前記フロアトンネル部の角部に、該フロアトンネル部の上面から側方外側に張り出したシート支持面と、該シート支持面の張り出し部下方に前記フロアトンネル部の側面側に折り曲げられ、前記フロアトンネル部の側面部に取り付けられる側部とで構成し、前記後部シート取付ブラケットの側部に、車幅方向の端面を、車体の前後方向に見て下部側が細くなるように切り欠いて前記シート支持面の張り出し部下方側に空洞部を形成し、該切り欠き部の両側に設けられた一対の脚部を下方に向けて、両側に末広がりに形成し、該切り欠き部の両側脚部と、前記シート支持面を前記フロアトンネル部の側面部と上面部に取り付けるとともに、前記車体フロアのフロアパネルとフロアトンネル部の重合部に、前記フロアトンネル部内側を補強するフロアトンネル補強部材を、前記空洞部を通して接合したことにある。
また、本発明は、前記フロアトンネル部を挟んで両側に設けられる前記フロアパネルの車幅方向内側の縁部と前記フロアトンネル部の側面部の重合部に、前記シート取付ブラケットの脚部に設けられたフランジ部の一部および、前記脚部の間の前記フロアトンネル部内面側に位置する前記フロアトンネル補強部材の側面部を接合したことにある。
さらに、本発明は、前記フロアトンネル部の側面部の下端部に、前記フロアパネルの車幅方向内側の下面部に回り込む延長部を設け、該延長部に車体前後方向の凹部を形成するとともに、該延長部の先端フランジ部を前記フロアパネルの下面部に接合して車体前後方向に閉じ断面を形成し、かつ前記凹部内に、該凹部内を車幅方向に仕切る隔壁を、前記シート取付ブラケットの脚部下方に設けたことにある。
またさらに、本発明は、前記隔壁の車幅方向外側に、水平面のフランジ部を設け、該外側フランジ部を前記フロアトンネル部の延長部の先端フランジ部に重ね、前記フロアパネルとともに互いに接合し、前記隔壁の車幅方向内側に前記フロアトンネル部の側面部に沿ってフランジ部を設け、該内側フランジ部を前記フロアトンネル部および前記フロアトンネル補強部材の重合部に接合したことにある。 In order to solve the above problems, the present invention provides a vehicle seat provided on both sides of a floor tunnel portion formed in the vehicle longitudinal direction center portion of the vehicle body floor in the longitudinal direction of the vehicle body. A vehicle seat mounting structure in which the left and right seat rail assemblies are mounted to the vehicle body floor via front and rear seat mounting brackets, respectively, and supports the rear interior side of the vehicle seat in the seat mounting bracket. A rear seat mounting bracket is provided at a corner portion of the floor tunnel portion, a seat support surface projecting laterally outward from an upper surface of the floor tunnel portion, and a side surface side of the floor tunnel portion below the projecting portion of the seat support surface. And a side part that is bent and attached to a side part of the floor tunnel part, and is formed on a side part of the rear seat mounting bracket in the vehicle width direction. The surface is notched so that the lower side is thin when viewed in the front-rear direction of the vehicle body to form a hollow portion below the overhanging portion of the seat support surface, and a pair of legs provided on both sides of the notch It is formed in a downwardly extending manner on both sides facing downward, and both leg portions of the cutout portion and the seat support surface are attached to the side surface portion and the upper surface portion of the floor tunnel portion, and the floor panel and floor tunnel of the vehicle body floor A floor tunnel reinforcing member that reinforces the inside of the floor tunnel portion is joined to the overlapping portion of the portion through the hollow portion.
Further, the present invention is provided at the leg portion of the seat mounting bracket at the overlapping portion of the inner side edge of the floor panel and the side surface portion of the floor tunnel portion provided on both sides of the floor tunnel portion. A part of the flange portion formed and the side surface portion of the floor tunnel reinforcing member located on the inner surface side of the floor tunnel portion between the leg portions are joined.
Furthermore, the present invention is provided with an extension portion that wraps around the lower surface portion on the inner side in the vehicle width direction of the floor panel at the lower end portion of the side surface portion of the floor tunnel portion, and forms a recess in the vehicle body longitudinal direction in the extension portion. The seat mounting bracket includes a partition wall that joins a front end flange portion of the extension portion to a lower surface portion of the floor panel to form a closed cross section in the vehicle front-rear direction and partitions the inside of the recess in the vehicle width direction. This is because it is provided below the legs.
Furthermore, the present invention provides a horizontal flange portion on the outer side of the partition wall in the vehicle width direction, the outer flange portion is overlapped with a front end flange portion of the extension portion of the floor tunnel portion, and joined together with the floor panel, A flange portion is provided along the side surface portion of the floor tunnel portion on the inner side in the vehicle width direction of the partition wall, and the inner flange portion is joined to the floor tunnel portion and the overlapping portion of the floor tunnel reinforcing member.

本発明によれば、以下の効果を奏することができる。
後部シート取付ブラケットの側部に、車幅方向の端面を、車体の前後方向に見て下部側が細くなるように切り欠いて前記シート支持面の張り出し部下方側に空洞部を形成し、該切り欠き部の両側に設けられた一対の脚部を下方に向けて、両側に末広がりに形成し、該切り欠き部の両側脚部と、前記シート支持面を前記フロアトンネル部の側面部と上面部に取り付けるとともに、前記車体フロアのフロアパネルとフロアトンネル部の重合部に、前記フロアトンネル部内側を補強するフロアトンネル補強部材を、前記空洞部を通して接合したので、シート取付ブラケット、フロアパネルおよびフロアトンネル部の３枚で接合できるとともに、フロアパネル、フロアトンネルおよびフロアトンネル補強部材をシート支持面の張り出し部下方側の空洞部を通して３枚で接合できることから、フロアトンネル部の剛性の向上を図ることができる。また、切り欠き部の両側に設けられた一対の脚部を下方に向けて、両側に末広がりに形成したので、シート荷重がフロアトンネル部側面を下方向に広がりながら伝わるので、剛性の高いフロアトンネル部基部へ荷重が分散して伝わり、応力集中の緩和を図ることができる。
フロアトンネル部を挟んで両側に設けられる前記フロアパネルの車幅方向内側の縁部と前記フロアトンネル部の側面部の重合部に、前記シート取付ブラケットの脚部に設けられたフランジ部の一部および、前記脚部の間の前記フロアトンネル部内面側に位置する前記フロアトンネル補強部材の側面部を接合したので、フロアパネルの縁部、フロアトンネル部の側面部およびシート取付ブラケットの脚部の一部を３枚で接合できるとともに、フロアパネルの縁部、フロアトンネル部の側面部およびフロアトンネル補強部材の側面部をシート取付ブラケットの脚部の間を通して３枚で接合できることから、フロアトンネル部下部側の剛性の向上を図ることができる。
フロアトンネル部の側面部の下端部に、前記フロアパネルの車幅方向内側の下面部に回り込む延長部を設け、該延長部に車体前後方向の凹部を形成するとともに、該延長部の先端フランジ部を前記フロアパネルの下面部に接合して車体前後方向に閉じ断面を形成し、かつ前記凹部内に、該凹部内を車幅方向に仕切る隔壁を、前記シート取付ブラケットの脚部下方に設けたので、シート取付ブラケットの脚部の下方側に位置するフロアトンネル部下部側の剛性の向上を図ることができることから、閉じ断面形状の変形を防ぎ、局所的な変形を抑えることができる。
隔壁の車幅方向外側に、水平面のフランジ部を設け、該外側フランジ部を前記フロアトンネル部の延長部の先端フランジ部に重ね、前記フロアパネルとともに互いに接合し、前記隔壁の車幅方向内側に前記フロアトンネル部の側面部に沿ってフランジ部を設け、該内側フランジ部を前記フロアトンネル部および前記フロアトンネル補強部材の重合部に接合したので、隔壁の外側フランジ部、フロアトンネル部の延長部の先端フランジ部およびフロアパネルを３枚で接合し、隔壁の車幅方向内側のフランジ部、フロアトンネル部および前記フロアトンネル補強部材の重合部を３枚で接合することができることから、フロアトンネル部下部側の剛性の向上を図ることができる。 According to the present invention, the following effects can be obtained.
At the side of the rear seat mounting bracket, an end surface in the vehicle width direction is cut out so that the lower side is thinner when viewed in the front-rear direction of the vehicle body, and a cavity is formed below the protruding portion of the seat support surface. A pair of leg portions provided on both sides of the notch portion are formed to face downward and widen toward both sides, and the both side leg portions of the notch portion and the seat supporting surface are formed as a side surface portion and an upper surface portion of the floor tunnel portion. And a floor tunnel reinforcing member that reinforces the inside of the floor tunnel portion is joined to the overlap portion of the floor panel and the floor tunnel portion of the vehicle body floor through the hollow portion, so that the seat mounting bracket, the floor panel, and the floor tunnel The floor panel, floor tunnel, and floor tunnel reinforcing member can be joined with the three parts on the lower side of the overhanging part of the seat support surface. Because it can joined by three through, it is possible to improve the rigidity of the floor tunnel portion. In addition, since the pair of legs provided on both sides of the cut-out part is directed downward and widened on both sides, the seat load is transmitted while spreading downward on the side of the floor tunnel part. The load is dispersed and transmitted to the base portion, and stress concentration can be reduced.
A part of the flange portion provided on the leg portion of the seat mounting bracket on the edge portion on the vehicle width direction inner side of the floor panel provided on both sides of the floor tunnel portion and the overlapping portion of the side surface portion of the floor tunnel portion And since the side portions of the floor tunnel reinforcing member located on the inner surface side of the floor tunnel portion between the legs are joined, the edge of the floor panel, the side portion of the floor tunnel portion, and the leg portion of the seat mounting bracket A part of the floor tunnel can be joined with three pieces, and the edge of the floor panel, the side part of the floor tunnel part, and the side part of the floor tunnel reinforcing member can be joined together between the legs of the seat mounting bracket. The lower side rigidity can be improved.
At the lower end portion of the side surface portion of the floor tunnel portion, an extension portion that goes around the lower surface portion of the floor panel in the vehicle width direction is provided, and a recess in the longitudinal direction of the vehicle body is formed in the extension portion, and the front end flange portion of the extension portion Are connected to the lower surface of the floor panel to form a closed cross section in the vehicle front-rear direction, and a partition that partitions the inside of the recess in the vehicle width direction is provided below the leg of the seat mounting bracket. Therefore, the rigidity of the lower part of the floor tunnel portion located on the lower side of the leg portion of the seat mounting bracket can be improved, so that deformation of the closed cross-sectional shape can be prevented and local deformation can be suppressed.
A horizontal flange portion is provided on the outer side of the partition wall in the vehicle width direction, the outer flange portion is overlapped on the front end flange portion of the extension portion of the floor tunnel portion, joined together with the floor panel, and on the inner side of the partition wall in the vehicle width direction. Since the flange portion is provided along the side surface portion of the floor tunnel portion, and the inner flange portion is joined to the overlap portion of the floor tunnel portion and the floor tunnel reinforcing member, the outer flange portion of the partition wall, the extension portion of the floor tunnel portion Since the front end flange portion and the floor panel of the partition wall are joined by three pieces, the flange portion inside the vehicle width direction of the partition wall, the floor tunnel portion, and the overlapping portion of the floor tunnel reinforcing member can be joined by three pieces. The lower side rigidity can be improved.

本発明の実施の形態による車両用シートの取付構造を示す車体の斜視図である。1 is a perspective view of a vehicle body showing a mounting structure for a vehicle seat according to an embodiment of the present invention. 本発明の実施の形態による車両用シートの取付構造におけるフロアトンネル部に取り付けられたシート取付ブラケットを示す斜視図である。It is a perspective view which shows the seat attachment bracket attached to the floor tunnel part in the attachment structure of the vehicle seat by embodiment of this invention. 本発明の実施の形態による車両用シートの取付構造におけるシート取付ブラケットを示す斜視図である。It is a perspective view which shows the seat mounting bracket in the mounting structure of the vehicle seat by embodiment of this invention. フロアトンネル部に取り付けられた後部内側シート取付ブラケットを示す図３の矢視Ｘ方向の斜視図である。It is a perspective view of the arrow X direction of FIG. 3 which shows the rear part inner side seat mounting bracket attached to the floor tunnel part. 図３のＹ−Ｙ線断面図である。It is the YY sectional view taken on the line of FIG. 図５の左側面図である。FIG. 6 is a left side view of FIG. 5. フロアトンネル部の側部下面側に車体前後方向に設けられた閉じ断面内に配設された隔壁を示す斜視図である。It is a perspective view which shows the partition arrange | positioned in the closed cross section provided in the vehicle body front-back direction at the side part lower surface side of the floor tunnel part.

以下、本発明の実施の形態を、図面を参照しながら詳細に説明する。
図１ないし図３において、１は自動車の車体で、この車体１の床面を構成する車体フロア２には、車体１の幅方向中央部に、車体１の前後方向に沿って上方に向けて突出して形成され、かつ前方側が後方側に対してわずかに高くなるように傾斜して形成された車幅方向の断面形状が略ハット形に、鋼板をプレス成形等により成形されたフロアトンネル部３が設けられている。このフロアトンネル部３の両側には、車体１の両側サイドシル部４にかけて配設されるフロアパネル５が設けられている。各フロアパネル５は、薄い鋼板をプレス成形等により車幅方向にビードを入れて形成されており、かつ車幅方向内側の上方に折り曲げた縁部、すなわち車幅方向室内側フランジ部５ａをフロアトンネル部３の側面部３ｂにスポット溶接ｗにより接合され、車幅方向外側の上方に折り曲げた縁部、すなわち外側フランジ部５ｂを車体１の両側サイドシル部４の室内側側面部４ａにスポット溶接ｗにより接合されている。このフロアパネル５の前後方向の略中間部には、前記左右のサイドシル部４を連結する一対の略ハット形断面のフロントクロスメンバ６が前記フロアトンネル部３と直交するように車幅方向に設けられている。前記左右のフロントクロスメンバ６は、鋼板をプレス成形等により成形され、左右のフランジ部６ａを介して前記フロアパネル５にスポット溶接ｗにより接合されており、前記フロアトンネル部３の側面部３ｂに、室内側端面フランジ部６ｂをスポット溶接ｗにより接合して組付けられている。また、前記左右のフロントクロスメンバ６は、前記サイドシル部４の室内側側面部４ａに、外側端面フランジ部６ｃをスポット溶接ｗにより接合して組付けられている。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In FIG. 1 to FIG. 3, reference numeral 1 denotes a vehicle body. A vehicle body floor 2 constituting the floor surface of the vehicle body 1 is directed upward in the front-rear direction of the vehicle body 1 in the center in the width direction of the vehicle body 1. A floor tunnel portion 3 formed by pressing a steel plate into a substantially hat-shaped cross-sectional shape formed so as to protrude and inclined so that the front side is slightly higher than the rear side. Is provided. On both sides of the floor tunnel portion 3, floor panels 5 are provided that are disposed on both side sill portions 4 of the vehicle body 1. Each floor panel 5 is formed by putting a thin steel plate into a bead in the vehicle width direction by press molding or the like, and has an edge that is bent upward inside in the vehicle width direction, that is, a vehicle width direction indoor flange portion 5a on the floor. Spot welding w joined to the side surface portion 3b of the tunnel portion 3 by spot welding w and bent to the upper side in the vehicle width direction, that is, the outer flange portion 5b, is attached to the indoor side surface portion 4a of the side sill portions 4 on both sides of the vehicle body 1. It is joined by. A front cross member 6 having a substantially hat-shaped cross section for connecting the left and right side sill portions 4 is provided in the vehicle width direction so as to be orthogonal to the floor tunnel portion 3 at a substantially middle portion of the floor panel 5 in the front-rear direction. It has been. The left and right front cross members 6 are formed by pressing a steel plate or the like, and are joined to the floor panel 5 by spot welding w via left and right flange portions 6a, to the side surface portion 3b of the floor tunnel portion 3. The indoor side end face flange portion 6b is joined and assembled by spot welding w. The left and right front cross members 6 are assembled to the indoor side surface portion 4a of the side sill portion 4 by joining the outer end surface flange portion 6c by spot welding w.

一方、左右の車両用シート７は、それぞれシートクッション７ａの下面側に、左右一対のシートレール組立体８が組付けられており、この左右一対のシートレール組立体８は車体フロア２側に取り付けられる下部側シートレール８ａに対して上部側がスライド可能に構成されている。これら左右の下部側シートレール８ａは、車体フロア２側の４箇所に取り付けられたシート取付ブラケット９Ａ〜９Ｄに固定されている。これらシート取付ブラケット９Ａ〜９Ｄは、厚い鋼板をプレス成形等により成形したもので、それぞれ適用箇所に合わせて形状を変更して成形されている。シート取付ブラケット９Ａ〜９Ｄのうち、室内側のシート取付ブラケット９Ａ，９Ｃは、車両用シート７の室内側に配設されたシートレール組立体８のシートレール８ａを車体の前後方向に沿って配設するもので、フロアトンネル部３の上面３ａに一定間隔を置いて前後に取り付けられている。このシート取付ブラケット９Ａ，９Ｃは、左右の車両用シート７を同時に固定するためにブラケットの両側に取付部が設けられている。この場合、両側の取付部を分割して形成することで、左右の車両用シート７を個別に組み付けることもできる。
一方、シート取付ブラケット９Ｂ，９Ｄは、車両用シート７の外側のシートレール８ａを車体の前後方向に沿って配設するもので、前部外側シート取付ブラケット９Ｂは、前記フロントクロスメンバ６の車幅方向外側上面に取り付けられ、後部外側シート取付ブラケット９Ｄは、フロアパネル５上に、シート取付ブラケット９Ｂの後方に、一定間隔を置いて取り付けられている。 On the other hand, the left and right vehicle seats 7 each have a pair of left and right seat rail assemblies 8 mounted on the lower surface side of the seat cushion 7a, and the pair of left and right seat rail assemblies 8 are attached to the vehicle body floor 2 side. The upper side is configured to be slidable with respect to the lower side seat rail 8a. These left and right lower seat rails 8a are fixed to seat mounting brackets 9A to 9D attached to four locations on the vehicle body floor 2 side. These sheet mounting brackets 9A to 9D are formed by pressing a thick steel plate by press molding or the like, and are formed by changing the shape according to the application location. Among the seat mounting brackets 9A to 9D, the seat mounting brackets 9A and 9C on the indoor side arrange the seat rail 8a of the seat rail assembly 8 disposed on the indoor side of the vehicle seat 7 along the longitudinal direction of the vehicle body. It is provided, and is attached to the upper surface 3a of the floor tunnel portion 3 at a predetermined interval in front and rear. The seat mounting brackets 9A and 9C are provided with mounting portions on both sides of the bracket in order to fix the left and right vehicle seats 7 simultaneously. In this case, the left and right vehicle seats 7 can be individually assembled by forming the attachment portions on both sides separately.
On the other hand, the seat mounting brackets 9B and 9D are arranged so that the outer seat rails 8a of the vehicle seat 7 are arranged along the front-rear direction of the vehicle body, and the front outer seat mounting bracket 9B is a vehicle of the front cross member 6. The rear outer seat mounting bracket 9D is mounted on the outer upper surface in the width direction, and is mounted on the floor panel 5 at a predetermined interval behind the seat mounting bracket 9B.

前記前部内側シート取付ブラケット９Ａは、図３に示すように、前記フロントクロスメンバ６が取り付けられた位置の前記フロアトンネル部３に、シート支持面２０が前記フロアトンネル部３の上面部３ａを車幅方向に跨るようにして組付けられ、両側のフロントクロスメンバ６に、シート支持面２０の両端部取付部２１を組付けている。このシート支持面２０は、前後に延設されたフランジ部２０ａを介して前記フロアトンネル部３の上面にスポット溶接ｗされており、両端部取付部２１に、シートレール組立体８のシートレール８ａの前部を固定する取付孔２２が設けられている。前記取付部２１は、取付部２１の前後に下方向に延設されたフランジ部２１ａと、取付部２１の外側に延設されたフランジ部２１ｂを介してフロントクロスメンバ６の前後面６ｂと上面６ｃにスポット溶接ｗにより接合されている。   As shown in FIG. 3, the front inner seat mounting bracket 9 </ b> A has a seat support surface 20 that connects the upper surface portion 3 a of the floor tunnel portion 3 to the floor tunnel portion 3 where the front cross member 6 is attached. The both end attachment portions 21 of the seat support surface 20 are assembled to the front cross members 6 on both sides. The seat support surface 20 is spot-welded to the upper surface of the floor tunnel portion 3 via a flange portion 20a extending in the front-rear direction, and the seat rail 8a of the seat rail assembly 8 is attached to both end attachment portions 21. A mounting hole 22 is provided for fixing the front part. The mounting portion 21 includes an upper surface and a front surface 6b of the front cross member 6 through a flange portion 21a extending downward and forward of the mounting portion 21 and a flange portion 21b extending outward of the mounting portion 21. It is joined to 6c by spot welding w.

また、前部外側シート取付ブラケット９Ｂは、プレート状のシート支持面３０をフロントクロスメンバ６の前記左右のサイドシル部４側に、それぞれフロントクロスメンバ６の前後に跨るようにして接合して配設されている。前記シート支持面３０は、中央部にわずかに立ち上げた取付部３１が設けられ、この取付部３１にシートレール組立体８のシートレール８ａの前部を固定する取付孔３２が設けられている。シート支持面３０は、取付部３１の前後に延設されたフランジ部３１ａを介してフロントクロスメンバ６の前後面６ｂにスポット溶接ｗされ、取付部３１の左右に延設されたフランジ部３１ｂを介してフロントクロスメンバ６の上面６ｃにスポット溶接ｗされて接合されている。   Further, the front outer seat mounting bracket 9B is disposed by joining a plate-like seat support surface 30 to the left and right side sill portions 4 of the front cross member 6 so as to straddle the front and rear of the front cross member 6, respectively. Has been. The seat support surface 30 is provided with a mounting portion 31 that is slightly raised at the center, and a mounting hole 32 for fixing the front portion of the seat rail 8 a of the seat rail assembly 8 is provided in the mounting portion 31. . The seat support surface 30 is spot-welded to the front and rear surfaces 6b of the front cross member 6 via flange portions 31a extending in front and rear of the attachment portion 31, and the flange portions 31b extending in the left and right directions of the attachment portion 31 are provided. And is welded to the upper surface 6c of the front cross member 6 by spot welding w.

一方、前部内側シート取付ブラケット９Ａから一定距離車体後方側の前記フロアトンネル３に、後部内側シート取付ブラケット９Ｃが配設され、前部外側シート取付ブラケット９Ｂから一定距離車体後方側の前記左右のサイドシル部４側に、後部外側シート取付ブラケット９Ｄがそれぞれ配設されている。前記前部内側シート取付ブラケット９Ａと後部内側シート取付ブラケット９Ｃに、前記室内側のシートレール組立体８の下部側シートレール８ａの前後を固定し、前記前部外側シート取付ブラケット９Ｂと後部外側シート取付ブラケット９Ｄに、前記室外側のシートレール組立体８の下部側シートレール８ａの前後を固定している。   On the other hand, a rear inner seat mounting bracket 9C is disposed in the floor tunnel 3 on the vehicle body rear side a predetermined distance from the front inner seat mounting bracket 9A, and the left and right sides on the vehicle body rear side a predetermined distance from the front outer seat mounting bracket 9B. Rear outer seat mounting brackets 9D are respectively disposed on the side sill 4 side. The front inner seat mounting bracket 9A and the rear inner seat mounting bracket 9C are fixed to the front and rear sides of the lower seat rail 8a of the indoor seat rail assembly 8, and the front outer seat mounting bracket 9B and the rear outer seat are fixed. The front and rear of the lower seat rail 8a of the outdoor seat rail assembly 8 are fixed to the mounting bracket 9D.

前記後部外側シート取付ブラケット９Ｄは、プレート状のシート支持面４０の一端下部側にフロアパネル５に立設する脚部４１を有し、シート支持面４０の他端にサイドシル部４側に延びる延長部４２を有し、延長部４２に設けられたフランジ部４２ａを介して前記サイドシル部４の内壁面４ａおよび上面４ｂにそれぞれ接合して固定されている。前記脚部４１は、前後壁面４１ａおよび室内側壁面４１ｂで構成されており、前後壁面４１ａおよび室内側壁面４１ｂの下端部設けられた下端フランジ部４１ｃを介してフロアパネル５にスポット溶接ｗされている。この前記脚部４１のフロアパネル５に対する接合位置は、フロアパネル５の下面側にサイドメンバが設けられた位置に対応するように接合されている。   The rear outer seat mounting bracket 9 </ b> D has a leg portion 41 erected on the floor panel 5 on the lower end side of the plate-like seat support surface 40, and extends to the side sill portion 4 side on the other end of the seat support surface 40. The side sill portion 4 is joined and fixed to the inner wall surface 4a and the upper surface 4b via a flange portion 42a provided on the extension portion 42. The said leg part 41 is comprised by the front-and-back wall surface 41a and the indoor side wall surface 41b, and is spot-welded to the floor panel 5 via the lower end flange part 41c provided in the lower end part of the front-and-back wall surface 41a and the indoor side wall surface 41b. Yes. The joining positions of the leg portions 41 to the floor panel 5 are joined so as to correspond to the positions where the side members are provided on the lower surface side of the floor panel 5.

図４ないし図６は、左右の車両用シート７の室内側、すなわち車幅方向内側に配設されたシートレール組立体８における下部側シートレール８ａの後部側のシート取付ブラケット９Ｃの取付構造を示したものである。   4 to 6 show a mounting structure of the seat mounting bracket 9C on the rear side of the lower side seat rail 8a in the seat rail assembly 8 arranged on the indoor side of the left and right vehicle seats 7, that is, on the inner side in the vehicle width direction. It is shown.

前記シート取付ブラケット９Ｃは、略ハット形断面のフロアトンネル部３に、車幅方向に上部から跨るようにして組付けられている。このシート取付ブラケット９Ｃは、フロアトンネル部３の上面部３ａから車幅方向の側方外側に張り出したプレート状のシート支持面１０と、該シート支持面１０の張り出し部１０ａ下方に前記フロアトンネル部３の側面部３ｂ側に折り曲げられ、前記フロアトンネル部３の側面部３ｂに取り付けられる側面部１１とを有している。前記シート支持面１０の張り出し部１０ａには、シートレール組立体８の下部側シートレール８ａを固定する取付孔１０ｂが設けられており、図示しないボルト等を介してシートレール組立体８の下部側シートレール８ａが組付けられる。   The seat mounting bracket 9C is assembled to the floor tunnel portion 3 having a substantially hat-shaped cross section so as to straddle from the top in the vehicle width direction. The seat mounting bracket 9C includes a plate-like seat support surface 10 projecting outward from the upper surface 3a of the floor tunnel portion 3 in the vehicle width direction, and the floor tunnel portion below the projecting portion 10a of the seat support surface 10. 3 and a side surface portion 11 which is bent to the side surface portion 3b side and attached to the side surface portion 3b of the floor tunnel portion 3. A mounting hole 10b for fixing the lower seat rail 8a of the seat rail assembly 8 is provided in the overhanging portion 10a of the seat support surface 10, and the lower side of the seat rail assembly 8 is connected via a bolt or the like (not shown). The seat rail 8a is assembled.

前記シート取付ブラケット９Ｃの側面部１１には、車幅方向の端面を略台形状に切り欠いて、車体の前後方向に見て下部側が細くなるようにテーパに形成し、前記シート支持面１０の張り出し部１０ａ下方側に空洞部１２を形成し、該切り欠き部１１ａの両側に設けられた一対の脚部１１ｂを側面視で、下方に向けて、徐々に離れるように両側に末広がりに形成している。前記切り欠き部１１ａの両側脚部１１ｂには、それぞれ外側縁部にフランジ部１１ｃが設けられ、このフランジ部１１ｃと、前記シート支持面１０の両外側縁部に設けられたフランジ部１０ｂを介して前記フロアトンネル部３の側面部３ｂと上面部３ａにスポット溶接ｗにより接合して取り付けられている。前記両側脚部１１ｂは、車体の前後方向に見て下部側が前記フロアトンネル部３の側面部３ｂに徐々に近づくようにテーパに形成しており、後部席の足元を広く形成している。   The side surface portion 11 of the seat mounting bracket 9C is formed with a tapered shape such that the end surface in the vehicle width direction is cut into a substantially trapezoidal shape and the lower side becomes thinner when viewed in the front-rear direction of the vehicle body. A hollow portion 12 is formed on the lower side of the overhanging portion 10a, and a pair of leg portions 11b provided on both sides of the notch portion 11a are formed so as to spread toward both sides so as to be gradually separated downward in a side view. ing. Both side leg portions 11b of the notch portion 11a are provided with flange portions 11c at outer edge portions, respectively, and the flange portions 11c and flange portions 10b provided at both outer edge portions of the seat support surface 10 are provided. The floor tunnel portion 3 is attached to the side surface portion 3b and the upper surface portion 3a by spot welding w. The both side legs 11b are formed in a taper so that the lower side gradually approaches the side surface 3b of the floor tunnel portion 3 when viewed in the front-rear direction of the vehicle body, and the foot of the rear seat is formed wider.

前記シート取付ブラケット９Ｃに対応する、前記フロアトンネル部３の内側には、フロアトンネル部３の上面部３ａから側面部３ｂ側にかけてフロアトンネル部３内側を補強する略ハット形断面のフロアトンネル補強部材１３が設けられている。このフロアトンネル補強部材１３は、金属の帯状体を略コ字状にプレス成形、あるいは鍛造により成形して、フロアトンネル部３の上面部３ａに対応する上面部１３ａと、フロアトンネル部３の側面部３ｂに対応する側面部１３ｂとで略ハット形断面に形成したものである。フロアトンネル補強部材１３の上面部１３ａから側面部１３ｂに沿った長手方向にはビード部１３ｃが形成されて、補強されている。   A floor tunnel reinforcing member having a substantially hat-shaped cross section that reinforces the inside of the floor tunnel portion 3 from the upper surface portion 3a to the side surface portion 3b side of the floor tunnel portion 3 on the inner side of the floor tunnel portion 3 corresponding to the seat mounting bracket 9C. 13 is provided. The floor tunnel reinforcing member 13 is formed by press-forming or forging a metal strip into a substantially U shape, and an upper surface portion 13 a corresponding to the upper surface portion 3 a of the floor tunnel portion 3, and the side surface of the floor tunnel portion 3. The side surface portion 13b corresponding to the portion 3b is formed in a substantially hat-shaped cross section. A bead portion 13c is formed in the longitudinal direction along the side surface portion 13b from the upper surface portion 13a of the floor tunnel reinforcing member 13, and is reinforced.

このフロアトンネル補強部材１３は、前記空洞部１２を通して前記車体フロア２のフロアパネル５の車幅方向室内側フランジ部５ａとフロアトンネル部３の側面部３ｂとの重合部にスポット溶接ｗにより３枚で接合されている。前記シート取付ブラケット９Ｃの両側脚部１１ｂのフランジ部１１ｃは、下部側を、前記フロアパネル５の車幅方向室内側フランジ部５ａとフロアトンネル部３の側面部３ｂとの重合部にスポット溶接ｗにより３枚で接合され、シート取付ブラケット９Ｃの両側脚部１１ｂのフランジ部１１ｃの上部側は、フロアトンネル部３の側面部３ｂとフロアトンネル補強部材１３の重合部にスポット溶接ｗにより３枚で接合されて補強されている。   Three floor tunnel reinforcing members 13 are formed by spot welding w on the overlapping portion of the vehicle width direction indoor side flange portion 5a of the floor panel 5 of the vehicle body floor 2 and the side surface portion 3b of the floor tunnel portion 3 through the hollow portion 12. It is joined with. The flange portion 11c of the both side leg portions 11b of the seat mounting bracket 9C is spot-welded at the lower side to the overlap portion between the vehicle width direction indoor flange portion 5a of the floor panel 5 and the side surface portion 3b of the floor tunnel portion 3. The upper side of the flange portion 11c of the both side legs 11b of the seat mounting bracket 9C is joined to the side surface portion 3b of the floor tunnel portion 3 and the overlap portion of the floor tunnel reinforcing member 13 by spot welding w. Joined and reinforced.

前記フロアトンネル部３の側面部３ｂの下端部には、前記フロアパネル５の車幅方向内側の下面部に回り込む延長部３ｃを設け、該延長部３ｃに車体前後方向の凹部１４が形成されている。該延長部３ｃの先端フランジ部３ｄを前記フロアパネル５の下面部５ｃに接合して車体前後方向に閉じ断面１５が形成されている。前記シート取付ブラケット９Ｃの脚部１１ｂ下方に位置する前記凹部１４内には、図７に示すように該凹部１４内を車体の前後方向に仕切る隔壁（バルクヘッド）１６Ａ，１６Ｂが設けられている。この隔壁１６Ａ，１６Ｂは、前記凹部１４の幅方向に沿って凹部１４の形状に沿って湾曲させた帯状体１６ａと、この帯状体１６ａの互いに隣接する縁部に沿って凹部１４内に垂直方向に立設された壁部１６ｂと、前記帯状体１６ａの一端にフロアパネル５裏面に沿うように延設されたフランジ部１６ｃとで構成されている。前記隔壁１６Ａ，１６Ｂは、両側脚部１１ｂに対応する下方向の凹部１４に配置され、フランジ部１６ｃを前記フロアトンネル部３の前記先端フランジ部３ｄに重ねてフロアパネル５とともにスポット溶接ｗにより３枚で接合されて閉じ断面１５を形成している。前記隔壁１６Ａ，１６Ｂの前記帯状体１６ａにおけるフロアトンネル部３の側面部３ｂに重なる壁面１６ｄは、フロアトンネル部３の側面部３ｂと、フロアトンネル補強部材１３と重ね合わせて３枚でスポット溶接ｗにより接合されて補強されている。   An extension portion 3c is provided at the lower end portion of the side surface portion 3b of the floor tunnel portion 3 so as to wrap around the lower surface portion on the inner side in the vehicle width direction of the floor panel 5, and a recess 14 in the longitudinal direction of the vehicle body is formed in the extension portion 3c. Yes. A front end flange portion 3d of the extension portion 3c is joined to the lower surface portion 5c of the floor panel 5 to form a closed cross section 15 in the longitudinal direction of the vehicle body. As shown in FIG. 7, partition walls (bulk heads) 16A and 16B for partitioning the interior of the recess 14 in the longitudinal direction of the vehicle body are provided in the recess 14 positioned below the leg 11b of the seat mounting bracket 9C. . The partition walls 16A and 16B include a strip 16a curved along the width of the recess 14 along the shape of the recess 14 and a vertical direction in the recess 14 along the adjacent edges of the strip 16a. And a flange portion 16c extending along the back surface of the floor panel 5 at one end of the strip 16a. The partition walls 16A and 16B are arranged in the downward recessed portion 14 corresponding to the both side leg portions 11b, and the flange portion 16c is overlapped with the front end flange portion 3d of the floor tunnel portion 3 by spot welding w together with the floor panel 5. The closed cross section 15 is formed by joining with a sheet. A wall surface 16d that overlaps the side surface portion 3b of the floor tunnel portion 3 in the strip 16a of the partition walls 16A and 16B is overlapped with the side surface portion 3b of the floor tunnel portion 3 and the floor tunnel reinforcing member 13, and is spot welded with three pieces. Are joined and reinforced.

上記実施の形態による車両用シートの取付構造によれば、シートレール組立体８の下部側シートレール８ａを固定するシート支持面１０の張り出し部１０ａの下部側に、空洞部１２を形成し、この空洞部１２を通して車体フロア２のフロアパネル５の車幅方向室内側フランジ部５ａとフロアトンネル部３の側面部３ｂとの重合部にフロアトンネル補強部材１３を接合したので、３枚のパネルを溶接することができ、車両用シート７の後部車幅方向内側のシート取付ブラケット９Ｃの取付部の剛性を確保することができる。   According to the vehicle seat mounting structure according to the above-described embodiment, the cavity portion 12 is formed on the lower side of the overhanging portion 10a of the seat support surface 10 that fixes the lower side seat rail 8a of the seat rail assembly 8. Since the floor tunnel reinforcing member 13 is joined to the overlapping portion of the vehicle width direction indoor side flange portion 5a of the floor panel 5 of the vehicle body floor 2 and the side surface portion 3b of the floor tunnel portion 3 through the hollow portion 12, the three panels are welded. Thus, the rigidity of the mounting portion of the seat mounting bracket 9C on the inner side in the rear vehicle width direction of the vehicle seat 7 can be ensured.

また、シート取付ブラケット９Ｃの両側脚部１１ｂのフランジ部１１ｃは、下部側を、前記フロアパネル５の車幅方向室内側フランジ部５ａとフロアトンネル部３の側面部３ｂとの重合部にスポット溶接ｗにより３枚で接合され、シート取付ブラケット９Ｃの両側脚部１１ｂのフランジ部１１ｃの上部側は、フロアトンネル部３の側面部３ｂとフロアトンネル補強部材１３の重合部にスポット溶接ｗにより３枚で接合されて補強されている。
したがって、車体側面から、あるいは車体の前後方向から衝突荷重が加わって、車両用シートに車両前側斜め上方に向かう力が加えられた場合、このような力に対するシートの取付部及びその周辺の剛性を高めることができる。 Further, the flange portion 11c of the both side leg portions 11b of the seat mounting bracket 9C is spot-welded to the overlapping portion of the vehicle width direction indoor side flange portion 5a of the floor panel 5 and the side surface portion 3b of the floor tunnel portion 3. The upper side of the flange portion 11c of the both side leg portions 11b of the seat mounting bracket 9C is joined to the side surface portion 3b of the floor tunnel portion 3 and the overlap portion of the floor tunnel reinforcing member 13 by spot welding w. It is joined and reinforced with.
Accordingly, when a collision load is applied from the side of the vehicle body or from the front-rear direction of the vehicle body and a force directed obliquely upward on the front side of the vehicle is applied to the vehicle seat, the rigidity of the seat mounting portion and its surroundings against such force is reduced. Can be increased.

また、シート取付ブラケット９Ｃの切り欠き部１１ａの両側に設けられた一対の脚部１１ｂを下方に向けて、徐々に離れるように両側に末広がりに形成している。前記切り欠き部１１ａの両側脚部１１ｂには、それぞれ外側縁部にフランジ部１１ｃが設けられ、このフランジ部１１ｃと、前記シート支持面１０の両外側縁部に設けられたフランジ部１０ｂを介して前記フロアトンネル部３の側面部３ｂと上面部３ａにスポット溶接ｗにより接合して取り付けられているので、シート取付ブラケット９Ｃの取付強度の向上を図ることができる。シート取付ブラケット９Ｃの側面部１１には、車幅方向の端面を略台形状に切り欠いて、車体の前後方向に見て下部側が細くなるようにテーパに形成し、前記シート支持面１０の張り出し部１０ａ下方側に空洞部１２を形成しているので、後席足元空間の拡大を図ることができるとともに後部車幅方向内側のシート取付ブラケット９Ｃの取付部の剛性を確保することができる。   In addition, a pair of leg portions 11b provided on both sides of the notch portion 11a of the seat mounting bracket 9C are formed so as to spread downward on both sides so as to be gradually separated downward. Both side leg portions 11b of the notch portion 11a are provided with flange portions 11c at outer edge portions, respectively, and the flange portions 11c and flange portions 10b provided at both outer edge portions of the seat support surface 10 are provided. Since the floor tunnel portion 3 is attached to the side surface portion 3b and the upper surface portion 3a by spot welding w, the mounting strength of the seat mounting bracket 9C can be improved. The side surface portion 11 of the seat mounting bracket 9C is formed with a taper so that the end surface in the vehicle width direction is cut into a substantially trapezoidal shape and the lower side becomes thinner when viewed in the front-rear direction of the vehicle body. Since the hollow portion 12 is formed on the lower side of the portion 10a, the rear seat foot space can be increased and the rigidity of the mounting portion of the seat mounting bracket 9C on the inner side in the rear vehicle width direction can be ensured.

前記フロアトンネル部３の側面部３ｂの下端部には、前記フロアパネル５の車幅方向内側の下面部に回り込む延長部３ｃを設け、該延長部３ｃに車体前後方向の凹部１４が形成され、該延長部３ｃの先端フランジ部３ｄを前記フロアパネル５の下面部５ｃに接合して車体前後方向に閉じ断面１５が形成されているので、シート取付ブラケット９Ｃの脚部１１ｂの下方側に位置するフロアトンネル部３下部側の剛性の向上を図ることができる。   At the lower end of the side surface portion 3b of the floor tunnel portion 3, an extension portion 3c that goes around the lower surface portion on the inner side in the vehicle width direction of the floor panel 5 is provided, and a recess portion 14 in the vehicle body longitudinal direction is formed in the extension portion 3c. Since the front end flange portion 3d of the extension portion 3c is joined to the lower surface portion 5c of the floor panel 5 to form a closed cross section 15 in the longitudinal direction of the vehicle body, it is positioned below the leg portion 11b of the seat mounting bracket 9C. The rigidity of the lower side of the floor tunnel portion 3 can be improved.

また、前記凹部１４内には、該凹部１４内を車体の前後方向に仕切る隔壁（バルクヘッド）１６Ａ，１６Ｂが設けられているので、閉じ断面形状の変形を防ぎ、局所的な変形を抑えることができる。前記隔壁１６Ａ，１６Ｂは、フランジ部１６ｃを前記フロアトンネル部３の前記先端フランジ部３ｄに重ねてフロアパネル５とともにスポット溶接ｗにより３枚で接合されて閉じ断面１５を形成し、前記隔壁１６Ａ，１６Ｂの前記帯状部１６ａにおけるフロアトンネル部３の側面部３ｂに重なる壁面１６ｄは、フロアトンネル部３の側面部３ｂと、フロアトンネル補強部材１３と重ね合わせて３枚でスポット溶接ｗにより接合されて補強されていることから、シート取付ブラケット９Ｃの取付部の剛性をより向上することができる。よって、シート上部にかかる左右の斜め下方向の荷重などの車両用シート７に加わるシート荷重がシートレール組立体８の下部側シートレール８ａからシート取付ブラケット９Ｃに伝達されると、シート取付ブラケット９Ｃからフロアトンネル部３に伝わり、フロアトンネル補強部材１３で補強されたフロアトンネル部３の側面部３ｂから隔壁１６Ａ，１６Ｂにより補強されたフロアパネル５の下面部５ｃの閉じ断面１５に伝達されて車体フロア２全体に分散されて吸収される。   In addition, partition walls (bulk heads) 16A and 16B for partitioning the interior of the recess 14 in the front-rear direction of the vehicle body are provided in the recess 14 to prevent deformation of the closed cross-sectional shape and suppress local deformation. Can do. The partition walls 16A and 16B are overlapped with the end flange portion 3d of the floor tunnel portion 3 by the flange portion 16c and joined together with the floor panel 5 by spot welding w to form a closed cross section 15, and the partition walls 16A, 16B The wall surface 16d that overlaps the side surface portion 3b of the floor tunnel portion 3 in the belt-shaped portion 16a of 16B is overlapped with the side surface portion 3b of the floor tunnel portion 3 and the floor tunnel reinforcing member 13, and is joined by spot welding w in three pieces. Since it is reinforced, the rigidity of the mounting portion of the seat mounting bracket 9C can be further improved. Therefore, when a seat load applied to the vehicle seat 7 such as a left and right diagonal downward load applied to the upper portion of the seat is transmitted from the lower seat rail 8a of the seat rail assembly 8 to the seat mounting bracket 9C, the seat mounting bracket 9C. From the side surface portion 3b of the floor tunnel portion 3 reinforced by the floor tunnel reinforcing member 13 to the closed section 15 of the lower surface portion 5c of the floor panel 5 reinforced by the partition walls 16A and 16B. It is dispersed and absorbed throughout the floor 2.

上記のように、シート取付ブラケット９Ｃの取付部の剛性を向上させたことにより、車体の側面から加わる衝突荷重、あるいは車体の前後方向から加わる衝突荷重を、効果的に分散して応力集中の緩和を図ることができる。また、フロアトンネル部３上面の補強部材を省略して部品点数の削減を図り、重量の軽減を図ることができる。さらに、シート取付ブラケット９Ｃのシート支持面１０の張り出し部１０ａの下部側に、空洞部１２を形成しているので、空洞部１２を通してスポット溶接を行うことができることから、各接合部を３枚のパネルで接合して、剛性の向上を図ることができる。またさらに、することができる。シート取付ブラケット９Ｃの下部側を車体の前後方向に見て細く形成して、後席の足元空間の拡大を図ることができる。   As described above, by improving the rigidity of the mounting portion of the seat mounting bracket 9C, the collision load applied from the side surface of the vehicle body or the collision load applied from the front-rear direction of the vehicle body is effectively dispersed to reduce stress concentration. Can be achieved. In addition, the reinforcing member on the upper surface of the floor tunnel portion 3 can be omitted to reduce the number of parts and reduce the weight. Further, since the cavity portion 12 is formed on the lower side of the projecting portion 10a of the seat support surface 10 of the seat mounting bracket 9C, spot welding can be performed through the cavity portion 12, so that each joint portion has three sheets. It can be joined with a panel to improve rigidity. Furthermore, it can be done. The lower side of the seat mounting bracket 9C can be formed narrower when viewed in the front-rear direction of the vehicle body, so that the foot space of the rear seat can be expanded.

なお、本発明は、上記実施の形態のみに限定されるものではなく、例えば、上記の実施の形態では、左右の車両用シート７の取付部をシート取付ブラケット９Ｃの両側に設けたが、シート取付ブラケット９Ｃの取付部を、左右に分割してそれぞれ左右別個のシート取付ブラケットとして構成することもできる。また、フロアパネル５の車幅方向内側の下面部に閉じ断面１５を形成する凹部１４内には、車体の前後方向に仕切る２個の隔壁１６Ａ，１６Ｂを用いたが２個以上の隔壁１６Ａ，１６Ｂを用いてもよく、または、前後に長い１個の隔壁を用いることもできる。その他、本発明の技術思想に基づいて変形、変更して用いることもできる。   The present invention is not limited to the above embodiment. For example, in the above embodiment, the mounting portions of the left and right vehicle seats 7 are provided on both sides of the seat mounting bracket 9C. The mounting portion of the mounting bracket 9C can be divided into left and right parts and configured as separate left and right seat mounting brackets. In addition, in the recess 14 that forms a closed cross-section 15 on the lower surface of the floor panel 5 in the vehicle width direction, two partition walls 16A and 16B that are partitioned in the front-rear direction of the vehicle body are used. 16B may be used, or one long partition wall may be used. In addition, modifications and changes can be made based on the technical idea of the present invention.

１ 車体
２ 車体フロア
３ フロアトンネル部
３ａ 上面部
３ｂ 側面部
４ サイドシル部
４ａ 室内側側面部
５ フロアパネル
６ フロントクロスメンバ
７ 車両用シート
８ シートレール組立体
８ａ シートレール
９Ａ 前部内側シート取付ブラケット
９Ｂ 前部外側シート取付ブラケット
９Ｃ 後部内側シート取付ブラケット
９Ｄ 後部外側シート取付ブラケット
１０ シート支持面
１１ 側面部
１１ｂ 脚部
１２ 空洞部
１３ フロアトンネル補強部材
１４ 凹部
１５ 閉じ断面
１６Ａ，１６Ｂ 隔壁 DESCRIPTION OF SYMBOLS 1 Car body 2 Car body floor 3 Floor tunnel part 3a Upper surface part 3b Side surface part 4 Side sill part 4a Indoor side surface part 5 Floor panel 6 Front cross member 7 Vehicle seat 8 Seat rail assembly 8a Seat rail 9A Front inner seat mounting bracket 9B Front outer seat mounting bracket 9C Rear inner seat mounting bracket 9D Rear outer seat mounting bracket 10 Seat support surface 11 Side surface portion 11b Leg portion 12 Cavity portion 13 Floor tunnel reinforcing member 14 Recessed portion 15 Closed section 16A, 16B Partition

Claims (4)

車体フロアの車幅方向中央部に車体の前後方向に形成されたフロアトンネル部の両側に配設される車両用シートを、該車両用シートに設けられた左右のシートレール組立体をそれぞれ前後のシート取付ブラケットを介して車体フロアに取り付けるようにした車両用シートの取付構造であって、
前記シート取付ブラケットのうち車両用シートの後部、室内側を支持する後部シート取付ブラケットを、
前記フロアトンネル部の角部に、該フロアトンネル部の上面から側方外側に張り出したシート支持面と、該シート支持面の張り出し部下方に前記フロアトンネル部の側面側に折り曲げられ、前記フロアトンネル部の側面部に取り付けられる側部とで構成し、
前記後部シート取付ブラケットの側部に、車幅方向の端面を、車体の前後方向に見て下部側が細くなるように切り欠いて前記シート支持面の張り出し部下方側に空洞部を形成し、
該切り欠き部の両側に設けられた一対の脚部を下方に向けて、両側に末広がりに形成し、該切り欠き部の両側脚部と、前記シート支持面を、前記フロアトンネル部の側面部と上面部に取り付けるとともに、
前記車体フロアのフロアパネルとフロアトンネル部の重合部に、前記フロアトンネル部内側を補強するフロアトンネル補強部材を、前記空洞部を通して接合したことを特徴とする自動車用シートの取付構造。 A vehicle seat disposed on both sides of a floor tunnel portion formed in the longitudinal direction of the vehicle body at the vehicle width direction central portion of the vehicle body floor, and the left and right seat rail assemblies provided on the vehicle seat are A vehicle seat mounting structure that is attached to a vehicle body floor via a seat mounting bracket,
The rear seat mounting bracket for supporting the rear side of the vehicle seat and the indoor side of the seat mounting bracket,
A sheet support surface projecting laterally outward from an upper surface of the floor tunnel section at a corner of the floor tunnel section, and bent to a side of the floor tunnel section below the projecting section of the sheet support surface; With the side part attached to the side part of the part,
On the side portion of the rear seat mounting bracket, an end surface in the vehicle width direction is cut out so that the lower side becomes thinner when viewed in the front-rear direction of the vehicle body, and a cavity is formed below the overhanging portion of the seat support surface,
A pair of leg portions provided on both sides of the cutout portion are formed downward and widened on both sides, and the both side leg portions of the cutout portion and the seat support surface are formed as side portions of the floor tunnel portion. And attached to the upper surface,
A mounting structure for an automobile seat, wherein a floor tunnel reinforcing member for reinforcing the inside of the floor tunnel portion is joined to the overlap portion of the floor panel and the floor tunnel portion of the vehicle body floor through the hollow portion. 前記フロアトンネル部を挟んで両側に設けられる前記フロアパネルの車幅方向内側の縁部と前記フロアトンネル部の側面部の重合部に、前記シート取付ブラケットの脚部に設けられたフランジ部の一部および、前記脚部の間の前記フロアトンネル部内面側に位置する前記フロアトンネル補強部材の側面部を接合したことを特徴とする請求項１に記載の自動車用シートの取付構造。   One of the flange portions provided on the leg portions of the seat mounting brackets at the vehicle width direction inner edge of the floor panel provided on both sides of the floor tunnel portion and the overlapping portion of the side surface portion of the floor tunnel portion. The vehicle seat mounting structure according to claim 1, wherein a side surface portion of the floor tunnel reinforcing member located on the inner surface side of the floor tunnel portion between the portion and the leg portion is joined. 前記フロアトンネル部の側面部の下端部に、前記フロアパネルの車幅方向内側の下面部に回り込む延長部を設け、該延長部に車体前後方向の凹部を形成するとともに、該延長部の先端フランジ部を前記フロアパネルの下面部に接合して車体前後方向に閉じ断面を形成し、かつ前記凹部内に、該凹部内を車幅方向に仕切る隔壁を、前記シート取付ブラケットの脚部下方に設けたことを特徴とする請求項２に記載の自動車用シートの取付構造。   An extension portion is provided at the lower end portion of the side surface portion of the floor tunnel portion so as to wrap around the lower surface portion on the inner side in the vehicle width direction of the floor panel, and a recess in the vehicle body front-rear direction is formed in the extension portion. A partition wall is formed in the recess in the vehicle front-rear direction by joining the lower portion to the lower surface of the floor panel, and a partition that partitions the recess in the vehicle width direction is provided below the leg portion of the seat mounting bracket. The mounting structure for an automobile seat according to claim 2, wherein: 前記隔壁の車幅方向外側に、水平面のフランジ部を設け、該外側フランジ部を前記フロアトンネル部の延長部の先端フランジ部に重ね、前記フロアパネルとともに互いに接合し、前記隔壁の車幅方向内側に前記フロアトンネル部の側面部に沿ってフランジ部を設け、該内側フランジ部を前記フロアトンネル部および前記フロアトンネル補強部材の重合部に接合したことを特徴とする請求項３に記載の自動車用シートの取付構造。   A horizontal flange portion is provided on the outer side in the vehicle width direction of the partition wall, the outer flange portion is overlapped with a front end flange portion of the extension portion of the floor tunnel portion, and joined together with the floor panel. 4. The vehicle according to claim 3, wherein a flange portion is provided along a side surface portion of the floor tunnel portion, and the inner flange portion is joined to the overlap portion of the floor tunnel portion and the floor tunnel reinforcing member. Seat mounting structure.
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