JP6754095B2

JP6754095B2 - Stopper device for vehicles with frames

Info

Publication number: JP6754095B2
Application number: JP2016178758A
Authority: JP
Inventors: 惇宮前
Original assignee: Isuzu Motors Ltd
Current assignee: Isuzu Motors Ltd
Priority date: 2016-09-13
Filing date: 2016-09-13
Publication date: 2020-09-09
Anticipated expiration: 2036-09-13
Also published as: JP2018043590A

Description

本発明は、フレーム付車両のストッパ装置に関する。 The present invention relates to a stopper device for a vehicle with a frame.

特許文献１には、フレームに支持ブラケットを固定し、支持ブラケットにストッパ装置を装備し、ストッパ装置に対向する突出部を車体の下面に設けたフレーム付車両の車体構造が記載されている。ストッパ装置は第１及び第２のストッパ部材を備え、第１のストッパ部材は突出部に対して間隔を有する位置に配設される。車体は、フレームに対してゴム部材等の弾性部材を介して搭載され、通常の走行状態にあっても、車体はフレームに対して水平方向にある程度の距離内で移動する。車両が前面衝突を起こすと、フレームに大きな負の加速度が作用し、車体は慣性力の作用により前方へ移動し、突起部が第１のストッパ部材に衝突する。第１のストッパ部材が車体の慣性力により変形して第２のストッパ部材に当接すると、第２のストッパ部材によって車体の前方への移動が規制される。 Patent Document 1 describes a vehicle body structure of a framed vehicle in which a support bracket is fixed to a frame, the support bracket is equipped with a stopper device, and a protrusion facing the stopper device is provided on the lower surface of the vehicle body. The stopper device includes first and second stopper members, and the first stopper member is arranged at a position at a distance from the protrusion. The vehicle body is mounted on the frame via an elastic member such as a rubber member, and the vehicle body moves within a certain distance in the horizontal direction with respect to the frame even in a normal running state. When the vehicle causes a frontal collision, a large negative acceleration acts on the frame, the vehicle body moves forward due to the action of inertial force, and the protrusion collides with the first stopper member. When the first stopper member is deformed by the inertial force of the vehicle body and comes into contact with the second stopper member, the movement of the vehicle body forward is restricted by the second stopper member.

特開平１０−３３８１６２号公報Japanese Unexamined Patent Publication No. 10-338162

ところで、乗員がシートベルトで着座シート側に拘束されている場合には、車両の前面衝突時に、慣性による乗員からの力がシートベルト及び着座シートを介して車体側に伝わり、乗員の運動エネルギーの一部が車体の破損エネルギーで消費される。このように、車両の前面衝突時に乗員の運動エネルギーを車体の破損エネルギーで消費させることによって、乗員の傷害値指標の一つである乗員の最大減速度を低減して、乗員の傷害を低減できることが知られている（ライドダウン効果）。 By the way, when the occupant is restrained on the seat belt side by the seat belt, the force from the occupant due to inertia is transmitted to the vehicle body side via the seat belt and the seat seat at the time of a frontal collision of the vehicle, and the kinetic energy of the occupant is transmitted. Part of it is consumed by the damaged energy of the car body. In this way, by consuming the kinetic energy of the occupant with the damage energy of the vehicle body at the time of a frontal collision of the vehicle, the maximum deceleration of the occupant, which is one of the occupant's injury value indexes, can be reduced and the occupant's injury can be reduced. Is known (ridedown effect).

上記特許文献１の構造では、車両が前面衝突時してフレームに対する車体の前方への移動が規制された際、乗員は、シートベルトが効き始めるまで着座シートに対して前方へ移動する。すなわち、シートベルトが効き始めるまでは、車体側の着座シートの速度よりも乗員側の速度の方が高い状態となり、車体と乗員とに速度差が生じている。この速度差が大きいほどシートベルトが効き始めた際のライドダウン効果の効率（ライドダウン効率）が低く、乗員の最大減速度が高くなってしまう可能性がある。 In the structure of Patent Document 1, when the vehicle is restricted from moving forward with respect to the frame at the time of a frontal collision, the occupant moves forward with respect to the seating seat until the seat belt starts to work. That is, until the seat belt starts to work, the speed on the occupant side is higher than the speed on the seating seat on the vehicle body side, and there is a speed difference between the vehicle body and the occupant. The larger the speed difference, the lower the efficiency of the ride-down effect (ride-down efficiency) when the seat belt starts to work, and the maximum deceleration of the occupant may increase.

そこで、本発明は、車両の前面衝突時にライドダウン効率を高めて乗員の最大減速度を低減することが可能なフレーム付車両のストッパ装置の提供を目的とする。 Therefore, an object of the present invention is to provide a stopper device for a vehicle with a frame capable of increasing ride-down efficiency and reducing the maximum deceleration of occupants in the event of a frontal collision of the vehicle.

上記課題を解決するため、本発明は、車室の下方を区画するフロア部材がフレームによって弾性支持されるフレーム付車両のストッパ装置であって、第１ストッパと第２ストッパと保持手段とを備える。第１ストッパは、前後方向と交叉する対向面を有し、フレーム又はフロア部材の一方側に固定される。第２ストッパは、第１ストッパの対向面から離間して対向する位置に配置されてフレーム又はフロア部材の他方側に固定される支持部と、支持部と第１ストッパの対向面との間に配置されて支持部に支持される可動部とを有し、可動部が、対向面から離間して対向面との間に可動空間を区画する第１規制位置と、第１規制位置よりも支持部側の第２規制位置との間で、支持部に対して前後方向に移動可能である。保持手段は、車両の通常走行時に、第２ストッパの支持部に対する可動部の位置を第１規制位置に保持する。第１ストッパまたは第２ストッパのうちフロア部材側のストッパは、フレーム側のストッパよりも後方に配置される。可動空間は、第２ストッパと第１ストッパとの相対的な前後方向の移動を許容する。保持手段による支持部に対する可動部の保持は、車両が前面衝突してフロア部材がフレームに対して前方へ移動し、第１規制位置の第２ストッパの可動部と第１ストッパの対向面とが当接した後の所定のタイミングで解除される。第２規制位置の第２ストッパの可動部は、支持部に支持されて、支持部側への第１ストッパの移動を規制する。 In order to solve the above problems, the present invention is a stopper device for a vehicle with a frame in which a floor member that partitions the lower part of the vehicle interior is elastically supported by a frame, and includes a first stopper, a second stopper, and a holding means. .. The first stopper has an facing surface that intersects the front-rear direction, and is fixed to one side of the frame or floor member. The second stopper is located between a support portion arranged at a position facing away from the facing surface of the first stopper and fixed to the other side of the frame or floor member, and the facing surface of the support portion and the first stopper. It has a movable portion that is arranged and supported by a support portion, and the movable portion is separated from the facing surface and supports a first regulated position that partitions a movable space between the facing surface and the first regulated position. It is movable in the front-rear direction with respect to the support portion with respect to the second regulation position on the portion side. The holding means holds the position of the movable portion with respect to the support portion of the second stopper at the first regulated position during normal traveling of the vehicle. Of the first stopper or the second stopper, the stopper on the floor member side is arranged behind the stopper on the frame side. The movable space allows the relative movement of the second stopper and the first stopper in the front-rear direction. In the holding of the movable portion with respect to the support portion by the holding means, the vehicle collides with the front surface and the floor member moves forward with respect to the frame, so that the movable portion of the second stopper at the first regulation position and the facing surface of the first stopper come together. It is released at a predetermined timing after the contact. The movable portion of the second stopper at the second regulation position is supported by the support portion and restricts the movement of the first stopper to the support portion side.

上記構成では、第１ストッパが、フレーム又はフロア部材の一方側に固定され、第２ストッパの支持部が、他方側に固定され、第１ストッパまたは第２ストッパのうちフロア部材側のストッパが、フレーム側のストッパよりも後方に配置される。例えば、第１ストッパをフレーム側に固定した場合には、第２ストッパの支持部を、第１ストッパの後面（対向面）よりも後方に離間した位置に配置してフロア部材側に固定し、第１ストッパをフロア部材側に固定した場合には、第２ストッパの支持部を、第１ストッパの前面（対向面）よりも前方に離間した位置に配置してフレーム側に固定する。 In the above configuration, the first stopper is fixed to one side of the frame or the floor member, the support portion of the second stopper is fixed to the other side, and the stopper on the floor member side of the first stopper or the second stopper is It is placed behind the stopper on the frame side. For example, when the first stopper is fixed to the frame side, the support portion of the second stopper is arranged at a position separated behind the rear surface (opposing surface) of the first stopper and fixed to the floor member side. When the first stopper is fixed to the floor member side, the support portion of the second stopper is arranged at a position separated forward from the front surface (opposing surface) of the first stopper and fixed to the frame side.

保持手段による支持部に対する可動部の保持は、車両が前面衝突してフロア部材がフレームに対して前方へ移動し、第１規制位置の第２ストッパの可動部と第１ストッパの対向面とが当接した後の所定のタイミングで解除される。すなわち、車両が前面衝突した際に、第１規制位置の第２ストッパの可動部と第１ストッパの対向面とが当接した後の所望のタイミングで、保持手段による支持部に対する可動部の保持を解除することができる。 In the holding of the movable portion with respect to the support portion by the holding means, the vehicle collides with the front surface and the floor member moves forward with respect to the frame, so that the movable portion of the second stopper at the first regulation position and the facing surface of the first stopper come together. It is released at a predetermined timing after the contact. That is, when the vehicle collides in front, the movable portion is held by the holding means with respect to the support portion at a desired timing after the movable portion of the second stopper at the first regulation position and the facing surface of the first stopper come into contact with each other. Can be released.

例えば、車室の座席シートに乗員が着座してシートベルトを締めた状態で車両が前面衝突してフレームの前端部が衝突物と衝突すると、フロア部材がフレームに対して前方へ慣性によって移動する。フロア部材がフレームに対して前方へ移動して第２ストッパの可動部と第１ストッパの対向面とが当接すると、フレームに対する前方へのフロア部材の移動が規制されてフロア部材の減速度が急激に増大し、乗員は、シートベルトが効き始めるまでフロア部材側の着座シートに対して前方へ慣性によって移動する。すなわち、乗員の速度が、フロア部材側の着座シートの速度よりも速くなる。ここで、第２ストッパの可動部と第１ストッパの対向面とが当接した後の所定のタイミングで、支持部に対する可動部の第１規制位置への保持を解除すると、可動部が第１規制位置から第２規制位置側へ移動し、この可動部の移動に伴って、フロア部材側（車体側）がフレームに対して前方へ移動する。このように、車体がフレームに対して前方へ移動することによって車体の減速度が減少して車体の速度低下が抑制される一方で、乗員はシートベルトによって減速度が増大して減速し始めるので、乗員と着座シートとの速度差を小さくすることができる。また、第２規制位置の第２ストッパの可動部は、支持部に支持されて、支持部側への第１ストッパの移動を規制するので、フレームに対する前方への車体の移動が再度規制される。すなわち、乗員と車体との速度差を小さくした状態で、シートベルトによって乗員を着座シートへ拘束して車体と乗員とを減速させることができるので、車両の前面衝突時に乗員の運動エネルギーを車体等（フレームを含む）の破損エネルギーで消費させる効率（ライドダウン効率）を高めることができ、乗員の傷害値指標の一つである乗員の最大減速度を低減して乗員の傷害を低減することができる。 For example, when a vehicle collides with the front of a vehicle while a occupant is seated on a seat in the passenger compartment and the seat belt is fastened and the front end of the frame collides with a colliding object, the floor member moves forward with respect to the frame by inertia. .. When the floor member moves forward with respect to the frame and the movable portion of the second stopper and the facing surface of the first stopper come into contact with each other, the movement of the floor member forward with respect to the frame is restricted and the deceleration of the floor member is reduced. The number increases rapidly, and the occupant moves forward by inertia with respect to the seat on the floor member side until the seat belt starts to work. That is, the speed of the occupant is faster than the speed of the seat on the floor member side. Here, when the holding of the movable portion with respect to the support portion at the first regulation position is released at a predetermined timing after the movable portion of the second stopper and the facing surface of the first stopper come into contact with each other, the movable portion becomes the first. It moves from the regulated position to the second regulated position side, and the floor member side (vehicle body side) moves forward with respect to the frame as the movable portion moves. In this way, as the vehicle body moves forward with respect to the frame, the deceleration of the vehicle body is reduced and the speed reduction of the vehicle body is suppressed, while the occupant starts decelerating due to the increase in deceleration due to the seat belt. , The speed difference between the occupant and the seat can be reduced. Further, since the movable portion of the second stopper at the second regulation position is supported by the support portion and restricts the movement of the first stopper to the support portion side, the movement of the vehicle body forward with respect to the frame is regulated again. .. That is, with the speed difference between the occupant and the vehicle body reduced, the occupant can be restrained by the seat belt to decelerate the vehicle body and the occupant, so that the kinetic energy of the occupant can be applied to the vehicle body or the like at the time of a frontal collision of the vehicle. It is possible to increase the efficiency (ridedown efficiency) consumed by the broken energy (including the frame), reduce the maximum deceleration of the occupant, which is one of the occupant's injury value indexes, and reduce the occupant's injury. it can.

また、保持手段は、車両の通常走行時に、第２ストッパの支持部に対する可動部の位置を第１規制位置に保持する。第１規制位置の可動部は、第１ストッパの対向面から離間して対向面との間に可動空間を区画し、可動空間は、第２ストッパと第１ストッパとの相対的な前後方向の移動を許容する。このため、車両の通常走行時に、フレームに弾性支持されたフロア部材がフレームに対して前方へ移動した場合であっても、第１ストッパと第２ストッパとが干渉せず、フレームによるフロア部材の弾性支持が損なわれることがないので、車両の通常走行時の乗り心地の低下を抑制することができる。 Further, the holding means holds the position of the movable portion with respect to the support portion of the second stopper at the first regulated position during normal traveling of the vehicle. The movable portion at the first regulated position is separated from the facing surface of the first stopper to partition the movable space between the facing surface, and the movable space is the relative front-rear direction between the second stopper and the first stopper. Allow movement. Therefore, even when the floor member elastically supported by the frame moves forward with respect to the frame during normal running of the vehicle, the first stopper and the second stopper do not interfere with each other, and the floor member by the frame Since the elastic support is not impaired, it is possible to suppress a decrease in riding comfort during normal traveling of the vehicle.

本発明によれば、車両の前面衝突時にライドダウン効率を高めて乗員の最大減速度を低減することができる。 According to the present invention, it is possible to increase the ride-down efficiency and reduce the maximum deceleration of the occupant at the time of a frontal collision of the vehicle.

本発明の第１実施形態に係るフレーム付車両の概略図であり、（ａ）は側面図、（ｂ）は（ａ）を矢印Ｉｂ方向から視た底面図である。It is the schematic of the vehicle with a frame which concerns on 1st Embodiment of this invention, (a) is a side view, (b) is the bottom view which (a) is seen from the direction of arrow Ib. 図１（ｂ）のストッパ装置の要部の拡大図である。It is an enlarged view of the main part of the stopper device of FIG. 1B. 図２のストッパ装置の第２ストッパの概略構成図である。It is a schematic block diagram of the 2nd stopper of the stopper device of FIG. 第２ストッパの動きの説明図であり、（ａ）は第１状態を、（ｂ）は第２状態を、（ｃ）は第３状態を、（ｄ）は第４状態をそれぞれ示す。It is explanatory drawing of the movement of the 2nd stopper, (a) shows a 1st state, (b) shows a 2nd state, (c) shows a 3rd state, and (d) shows a 4th state. 図１（ａ）のフレーム付車両が前面衝突したときの状態を示す概略図である。It is the schematic which shows the state when the vehicle with a frame of FIG. 1A collides with the front. 本発明の第２実施形態に係るストッパ装置の第２ストッパの概略構成図であり、（ａ）は第１規制位置に、（ｂ）は第２規制位置に可動部材が配置された状態をそれぞれ示す。It is a schematic block diagram of the 2nd stopper of the stopper device which concerns on 2nd Embodiment of this invention, (a) is the state which the movable member is arranged at the 1st regulation position, (b) is the state which is arranged at the 2nd regulation position, respectively. Shown.

以下、本発明の第１実施形態に係るフレーム付車両（以下、単に車両と称する）１のストッパ装置１０について、図面に基づいて説明する。なお、各図において、ＦＲは車両の前方を、ＵＰは上方を、ＩＮは車幅方向内側をそれぞれ示す。また、以下の説明において、左右方向は車両前方を向いた状態での左右方向を意味する。また、図２は、図１（ｂ）の車両１の右側の要部の拡大図である。 Hereinafter, the stopper device 10 of the framed vehicle (hereinafter, simply referred to as a vehicle) 1 according to the first embodiment of the present invention will be described with reference to the drawings. In each figure, FR indicates the front of the vehicle, UP indicates the upper side, and IN indicates the inner side in the vehicle width direction. Further, in the following description, the left-right direction means the left-right direction in a state of facing the front of the vehicle. Further, FIG. 2 is an enlarged view of a main part on the right side of the vehicle 1 in FIG. 1 (b).

図１（ａ）及び図１（ｂ）に示すように、車両１は、ボディ５がラバー等のマウント機構（図示省略）を介してフレーム２に弾性支持されるフレーム付車両である。 As shown in FIGS. 1A and 1B, the vehicle 1 is a vehicle with a frame in which the body 5 is elastically supported by the frame 2 via a mounting mechanism (not shown) such as rubber.

車両１のフレーム２は、車幅方向の両側で前後方向に延びる左右１対のサイドメンバ３（３Ｌ，３Ｒ）と、車幅方向に延びて左右のサイドメンバ３を連結する複数のクロスメンバ４とを有するはしご形フレーム（ラダーフレーム）である。複数のクロスメンバ４は、前後方向に相互に離間して配置される。 The frame 2 of the vehicle 1 has a pair of left and right side members 3 (3L, 3R) extending in the front-rear direction on both sides in the vehicle width direction and a plurality of cross members 4 extending in the vehicle width direction and connecting the left and right side members 3. It is a ladder-shaped frame (ladder frame) having and. The plurality of cross members 4 are arranged so as to be separated from each other in the front-rear direction.

車両１のボディ５は、車室１１の下方を区画するフロア部材１２を有し、フレーム２に弾性支持される。フロア部材１２は、フロアパネル６と左右１対のサイドシル７（７Ｌ，７Ｒ）とを有する。フロアパネル６は、フレーム２の上方に配置されて車室１１の底面を形成するパネル部材であって、その車幅方向の中央には、円弧状に上方へ膨出するトンネル部９が曲折形成されている。車室１１には、乗員が着座する着座シート（座席）８が配置されてフロアパネル６に対して固定される。フロアパネル６は、着座シート８を下方から支持する。左右のサイドシル７は、左右のサイドメンバ３の車幅方向外側にそれぞれ配置されて前後方向に延び、フロアパネル６の車幅方向両側に固定される。左右のサイドメンバ３は、フロアパネル６及び左右のサイドシル７の前端よりも前方へ延び、左右のサイドメンバ３の前端が、フロアパネル６及び左右のサイドシル７の前端よりも前方に配置される。左右のサイドシル７は、ラバー等のマウント機構（図示省略）を介して左右のサイドメンバ３に弾性支持される。 The body 5 of the vehicle 1 has a floor member 12 that partitions the lower part of the vehicle interior 11, and is elastically supported by the frame 2. The floor member 12 has a floor panel 6 and a pair of left and right side sills 7 (7L, 7R). The floor panel 6 is a panel member that is arranged above the frame 2 and forms the bottom surface of the vehicle interior 11, and a tunnel portion 9 that bulges upward in an arc shape is bent at the center in the vehicle width direction. Has been done. In the passenger compartment 11, a seating seat (seat) 8 on which an occupant sits is arranged and fixed to the floor panel 6. The floor panel 6 supports the seating seat 8 from below. The left and right side sills 7 are arranged outside the left and right side members 3 in the vehicle width direction, extend in the front-rear direction, and are fixed to both sides of the floor panel 6 in the vehicle width direction. The left and right side members 3 extend forward from the front ends of the floor panel 6 and the left and right side sills 7, and the front ends of the left and right side members 3 are arranged in front of the front ends of the floor panel 6 and the left and right side sills 7. The left and right side sills 7 are elastically supported by the left and right side members 3 via a mounting mechanism (not shown) such as rubber.

図２及び図３に示すように、ストッパ装置１０は、加速度センサ１３と、ＥＣＵ（ＥｌｅｃｔｒｉｃＣｏｎｔｒｏｌＵｎｉｔ）１４と、左右の第１ストッパ１５（１５Ｌ，１５Ｒ）と、左右の第２ストッパ１６（１６Ｌ，１６Ｒ）とを備える。なお、図２及び図３には、右側の第１ストッパ１５Ｒと右側の第２ストッパ１６Ｒとが図示されている。また、左右の第１ストッパ１５と左右の第２ストッパ１６とは、車両１の左右に対照的に設けられ、ほぼ同様の構成を有するため、以下では、一方について説明し、他方の説明を省略する。 As shown in FIGS. 2 and 3, the stopper device 10 includes an acceleration sensor 13, an ECU (Electronic Control Unit) 14, left and right first stoppers 15 (15L, 15R), and left and right second stoppers 16 (16L). , 16R). Note that FIGS. 2 and 3 show a first stopper 15R on the right side and a second stopper 16R on the right side. Further, since the left and right first stoppers 15 and the left and right second stoppers 16 are provided in contrast to the left and right sides of the vehicle 1 and have substantially the same configuration, one of them will be described below and the other will be omitted. To do.

図１（ａ）及び図３に示すように、加速度センサ１３は、車両１のボディ５側（例えば、フロア部材１２）に設けられ、ボディ５の減速度（負の加速度）を逐次検出する。 As shown in FIGS. 1A and 3, the acceleration sensor 13 is provided on the body 5 side (for example, the floor member 12) of the vehicle 1 and sequentially detects the deceleration (negative acceleration) of the body 5.

図１（ｂ）及び図３に示すように、第１ストッパ１５は、上下方向に延びる金属製の部材であって、サイドシル７の車幅方向内側に配置されてサイドシル７の車幅方向内側面１７に固定され、サイドシル７よりも下方へ延びる。第１ストッパ１５は、少なくともサイドメンバ３側の第２ストッパ１６よりも下方まで延び、第１ストッパ１５の前面（対向面）１８は、第２ストッパ１６から後方に離間した位置に配置される。第１ストッパ１５の後面側には、ほぼ直角三角形状の補強部１９が設けられる。補強部１９は、その第１辺がサイドシル７の車幅方向内側面１７に沿って前後方向に延びてサイドシル７の車幅方向内側面１７に固定され、第２辺が第１ストッパ１５の後面に沿って車幅方向に延びて第１ストッパ１５の後面に固定される。なお、本実施形態では、第１ストッパ１５をサイドシル７に固定したが、これに限定されるものではなく、第１ストッパ１５は、車室１１の下方を区画するフロア部材１２に対して固定されていればよい。また、第１ストッパ１５の素材や形状は、上記に限定されず、高い強度を有する様々な形状の部材を適用することができる。 As shown in FIGS. 1B and 3, the first stopper 15 is a metal member extending in the vertical direction, which is arranged inside the side sill 7 in the vehicle width direction and is arranged inside the side sill 7 in the vehicle width direction. It is fixed to 17 and extends below the side sill 7. The first stopper 15 extends at least below the second stopper 16 on the side member 3 side, and the front surface (opposing surface) 18 of the first stopper 15 is arranged at a position separated rearward from the second stopper 16. A substantially right-angled triangular reinforcing portion 19 is provided on the rear surface side of the first stopper 15. The first side of the reinforcing portion 19 extends in the front-rear direction along the inner side surface 17 in the vehicle width direction of the side sill 7 and is fixed to the inner side surface 17 in the vehicle width direction of the side sill 7, and the second side is the rear surface of the first stopper 15. It extends in the vehicle width direction along the above and is fixed to the rear surface of the first stopper 15. In the present embodiment, the first stopper 15 is fixed to the side sill 7, but the present invention is not limited to this, and the first stopper 15 is fixed to the floor member 12 that partitions the lower part of the vehicle interior 11. You just have to. Further, the material and shape of the first stopper 15 are not limited to the above, and members having various shapes having high strength can be applied.

図２及び図３に示すように、第２ストッパ１６は、支持部材（支持部）２１と、可動部材（可動部）２２と、カラー２３と、ソケット２４と、ヒューズボルト２５とを有し、第１ストッパ１５の前面１８から前方へ離間した位置に配置され、サイドメンバ３の車幅方向外側面２０に固定される。なお、本実施形態では、第２ストッパ１６をサイドメンバ３に固定したが、これに限定されるものではなく、第２ストッパ１６は、フレーム２に対して固定されていればよい。 As shown in FIGS. 2 and 3, the second stopper 16 has a support member (support portion) 21, a movable member (movable portion) 22, a collar 23, a socket 24, and a fuse bolt 25. It is arranged at a position separated forward from the front surface 18 of the first stopper 15, and is fixed to the outer surface 20 of the side member 3 in the vehicle width direction. In the present embodiment, the second stopper 16 is fixed to the side member 3, but the present invention is not limited to this, and the second stopper 16 may be fixed to the frame 2.

支持部材２１は、金属製の部材であって、前後方向に延びる略円柱状の柱状部２６を有する。柱状部２６は、サイドメンバ３の車幅方向外側面２０から車幅方向外側に離間し、且つ第１ストッパ１５の前面１８から前方へ離間した位置に配置される。柱状部２６の後面は、第１ストッパ１５の前面１８に対向する。柱状部２６の前端部の車幅方向内側面には、車幅方向内側へ延びる連結部２７が一体的に設けられ、連結部２７の車幅方向内端部がサイドメンバ３の車幅方向外側面２０に固定される。すなわち、連結部２７は、柱状部２６とサイドメンバ３とを連結する。また、柱状部２６及び連結部２７の前端面と、サイドメンバ３の車幅方向外側面２０との間には、ほぼ直角三角形状の補強部２８が設けられる。補強部２８は、柱状部２６及び連結部２７の前端面と、サイドメンバ３の車幅方向外側面２０とに固定される。 The support member 21 is a metal member and has a substantially columnar columnar portion 26 extending in the front-rear direction. The columnar portion 26 is arranged at a position separated from the outer surface 20 in the vehicle width direction of the side member 3 outward in the vehicle width direction and forward from the front surface 18 of the first stopper 15. The rear surface of the columnar portion 26 faces the front surface 18 of the first stopper 15. A connecting portion 27 extending inward in the vehicle width direction is integrally provided on the inner side surface of the front end portion of the columnar portion 26 in the vehicle width direction, and the inner end portion of the connecting portion 27 in the vehicle width direction is outside the vehicle width direction of the side member 3. It is fixed to the side surface 20. That is, the connecting portion 27 connects the columnar portion 26 and the side member 3. Further, a substantially right-angled triangular reinforcing portion 28 is provided between the front end surface of the columnar portion 26 and the connecting portion 27 and the outer surface 20 of the side member 3 in the vehicle width direction. The reinforcing portion 28 is fixed to the front end surface of the columnar portion 26 and the connecting portion 27, and the outer surface 20 of the side member 3 in the vehicle width direction.

柱状部２６は、大径部２６ａと、大径部２６ａよりも小径の小径部２６ｂとを有する。小径部２６ｂは、大径部２６ａと同軸に配置されて大径部２６ａの後面２９から後方へ突出する。小径部２６ｂの外周面には、その周方向に沿って延びる溝部３２が形成される。柱状部２６は、小径部２６ｂの後面３０から前方へ直線状に延びる開口部３１を有する。開口部３１は、小径部２６ｂの後面３０から連続して大径部２６ａの内部まで延びる。開口部３１の内部には、インフレータ３３が設けられる。インフレータ３３は、ＥＣＵ１４からの信号によって作動して開口部３１内にガスを発生させる。 The columnar portion 26 has a large diameter portion 26a and a small diameter portion 26b having a smaller diameter than the large diameter portion 26a. The small diameter portion 26b is arranged coaxially with the large diameter portion 26a and projects rearward from the rear surface 29 of the large diameter portion 26a. A groove 32 extending along the circumferential direction is formed on the outer peripheral surface of the small diameter portion 26b. The columnar portion 26 has an opening 31 extending linearly forward from the rear surface 30 of the small diameter portion 26b. The opening 31 extends continuously from the rear surface 30 of the small diameter portion 26b to the inside of the large diameter portion 26a. An inflator 33 is provided inside the opening 31. The inflator 33 operates by a signal from the ECU 14 to generate gas in the opening 31.

可動部材２２は、金属製の部材であって、前方へ開口する有底の筒状に形成される。可動部材２２の内周面は、前方の開口３４から同径で後方へ延びる第１領域３５と、第１領域３５よりも小径に形成されて第１領域３５の後端から連続して後方へ延びる第２領域３６と、第２領域３６よりも小径に形成されて第２領域３６の後端から連続して後方へ延びる第３領域３７とを有する。第１領域３５と第２領域３６との間には、第１段差部３８が形成され、第２領域３６と第３領域３７との間には、第２段差部３９が形成される。第２領域３６の内径は、柱状部２６の大径部２６ａの挿入を許容するように、柱状部２６の大径部２６ａの外径よりも僅かに大きく形成される。第３領域３７の内径は、柱状部２６の大径部２６ａの外径よりも小さく、且つ小径部２６ｂ外径よりも大きく形成される。可動部材２２は、支持部材２１の柱状部２６と第１ストッパ１５の前面１８との間に配置され、柱状部２６の後端部側（小径部２６ｂ側）を開口３４から挿入した状態で、カラー２３、ソケット２４及びヒューズボルト２５を介して柱状部２６に前後方向に移動可能に支持される。 The movable member 22 is a metal member and is formed in a bottomed tubular shape that opens forward. The inner peripheral surface of the movable member 22 is formed into a first region 35 having the same diameter and extending rearward from the front opening 34 and a diameter smaller than that of the first region 35, and is continuously rearward from the rear end of the first region 35. It has a second region 36 that extends, and a third region 37 that is formed to have a diameter smaller than that of the second region 36 and extends continuously rearward from the rear end of the second region 36. A first step portion 38 is formed between the first region 35 and the second region 36, and a second step portion 39 is formed between the second region 36 and the third region 37. The inner diameter of the second region 36 is formed to be slightly larger than the outer diameter of the large diameter portion 26a of the columnar portion 26 so as to allow the insertion of the large diameter portion 26a of the columnar portion 26. The inner diameter of the third region 37 is formed to be smaller than the outer diameter of the large diameter portion 26a of the columnar portion 26 and larger than the outer diameter of the small diameter portion 26b. The movable member 22 is arranged between the columnar portion 26 of the support member 21 and the front surface 18 of the first stopper 15, and the rear end portion side (small diameter portion 26b side) of the columnar portion 26 is inserted through the opening 34. It is movably supported by the columnar portion 26 in the front-rear direction via the collar 23, the socket 24, and the fuse bolt 25.

カラー２３は、樹脂製の部材であって、前後方向と交叉する円板状のベース部４０と、ベース部４０の前面側の中央部から前方へ突出する円柱状の蓋部４１と、ベース部４０の前面側の外周縁部から前方へ突出する円環状の側壁部４２とを有し、支持部材２１の柱状部２６の後方に配置されて、柱状部２６の小径部２６ｂに前後方向に移動可能に支持される。ベース部４０の外径は、可動部材２２の第３領域３７の内径よりも僅かに小さく形成される。蓋部４１は、その外径が柱状部２６の開口部３１の内径と略同じ大きさに形成され、柱状部２６の開口部３１に後方から圧入された状態で開口部３１の開口を密閉して塞ぐ。側壁部４２の外周面は、ベース部４０の外径と同径でベース部４０の外周縁から連続して前方へ延びる第１領域４３と、第１領域４３よりも小径に形成されて第１領域４３の前端から連続して前方へ延びる第２領域４４とを有する。側壁部４２の外周面の第２領域４４の外径は、柱状部２６の小径部２６ｂの外径よりも大きい。側壁部４２の内径は、柱状部２６の小径部２６ｂの外径よりも僅かに大きく形成され、柱状部２６の小径部２６ｂの挿入を許容する。側壁部４２の前端部には、側壁部４２の内周面４６から径方向の内側へ突出する円環状の突出部４５が形成される。突出部４５は、柱状部２６の小径部２６ｂの溝部３２内に配置される。突出部４５の前後方向の厚さは、柱状部２６の溝部３２の幅（前後方向の長さ）よりも短い。柱状部２６の小径部２６ｂをカラー２３の側壁部４２の内側に挿入し、蓋部４１を柱状部２６の開口部３１に圧入し、突出部４５を柱状部２６の溝部３２内に配置した状態で、カラー２３は、柱状部２６の小径部２６ｂに支持される。 The collar 23 is a resin member, and has a disk-shaped base portion 40 that intersects the front-rear direction, a columnar lid portion 41 that projects forward from the central portion on the front surface side of the base portion 40, and a base portion. It has an annular side wall portion 42 projecting forward from the outer peripheral edge portion on the front surface side of the 40, is arranged behind the columnar portion 26 of the support member 21, and moves in the front-rear direction to the small diameter portion 26b of the columnar portion 26. Supported as possible. The outer diameter of the base portion 40 is formed to be slightly smaller than the inner diameter of the third region 37 of the movable member 22. The outer diameter of the lid 41 is formed to be substantially the same as the inner diameter of the opening 31 of the columnar portion 26, and the opening of the opening 31 is sealed while being press-fitted into the opening 31 of the columnar portion 26 from behind. And close it. The outer peripheral surface of the side wall portion 42 has a first region 43 having the same diameter as the outer diameter of the base portion 40 and continuously extending forward from the outer peripheral edge of the base portion 40, and a first region 43 having a diameter smaller than that of the first region 43. It has a second region 44 that extends continuously forward from the front end of the region 43. The outer diameter of the second region 44 on the outer peripheral surface of the side wall portion 42 is larger than the outer diameter of the small diameter portion 26b of the columnar portion 26. The inner diameter of the side wall portion 42 is formed to be slightly larger than the outer diameter of the small diameter portion 26b of the columnar portion 26, and the insertion of the small diameter portion 26b of the columnar portion 26 is permitted. At the front end of the side wall 42, an annular protrusion 45 is formed that protrudes inward in the radial direction from the inner peripheral surface 46 of the side wall 42. The protruding portion 45 is arranged in the groove portion 32 of the small diameter portion 26b of the columnar portion 26. The thickness of the protruding portion 45 in the front-rear direction is shorter than the width (length in the front-rear direction) of the groove portion 32 of the columnar portion 26. A state in which the small diameter portion 26b of the columnar portion 26 is inserted inside the side wall portion 42 of the collar 23, the lid portion 41 is press-fitted into the opening portion 31 of the columnar portion 26, and the protruding portion 45 is arranged in the groove portion 32 of the columnar portion 26. The collar 23 is supported by the small diameter portion 26b of the columnar portion 26.

ソケット２４は、Ｃリング状に形成された金属製の板状部材であって、径方向に弾性変形可能であり、支持部材２１の柱状部２６の小径部２６ｂの径方向外側で小径部２６ｂの周方向に沿って延びる。ソケット２４の外周面には、後端側の第１領域４８と、第１領域４８よりも大径に形成されて第１領域４８の前方に配置される第２領域４９とを有する。第１領域４８と第２領域４９との間には、段差部５０が形成される。ソケット２４が縮径してソケット２４の内周面４７と柱状部２６の小径部２６ｂの外周面とが当接した状態（図４（ｃ）参照）でのソケット２４の第２領域４９の外径は、柱状部２６の大径部２６ａの外径よりも小さい。 The socket 24 is a metal plate-shaped member formed in a C-ring shape, which is elastically deformable in the radial direction, and is a small diameter portion 26b outside the small diameter portion 26b of the columnar portion 26 of the support member 21 in the radial direction. It extends along the circumferential direction. The outer peripheral surface of the socket 24 has a first region 48 on the rear end side and a second region 49 formed having a diameter larger than that of the first region 48 and arranged in front of the first region 48. A step portion 50 is formed between the first region 48 and the second region 49. Outside the second region 49 of the socket 24 in a state where the socket 24 is reduced in diameter and the inner peripheral surface 47 of the socket 24 and the outer peripheral surface of the small diameter portion 26b of the columnar portion 26 are in contact with each other (see FIG. 4C). The diameter is smaller than the outer diameter of the large diameter portion 26a of the columnar portion 26.

ヒューズボルト２５は、所定の大きさ以上の荷重が入力した際に破断可能なボルトであって、後述するように、可動部材２２と支持部材２１の柱状部２６とを固定する。ヒューズボルト２５の強度は、車両１の通常走行中の振動等によっては破断せず、且つ後述する車両１の前面衝突時に可動部材２２から前方への荷重が入力した際に容易に破断する強度に設定される。 The fuse bolt 25 is a bolt that can be broken when a load of a predetermined size or more is input, and fixes the movable member 22 and the columnar portion 26 of the support member 21 as described later. The strength of the fuse bolt 25 is such that it does not break due to vibration or the like during normal running of the vehicle 1 and easily breaks when a forward load is input from the movable member 22 at the time of a frontal collision of the vehicle 1 described later. Set.

図３に示すように、インフレータ３３が作動していない通常時（以下、単に通常時という）には、柱状部２６の小径部２６ｂの後面３０がカラー２３のベース部４０の前面に当接し、カラー２３の突出部４５の前面が柱状部２６の溝部３２の前壁に当接することによって、柱状部２６の小径部２６ｂに対するカラー２３の前方への移動が規制される。また、カラー２３の蓋部４１が、柱状部２６の開口部３１に圧入されて開口部３１の内周面を押圧する状態で開口部３１の内周面に密接し、柱状部２６の小径部２６ｂに対するカラー２３の後方への移動を規制する。ソケット２４は、径方向外側に拡径された状態で、ソケット２４の内周面４７がカラー２３の外周面の第２領域４４に当接し、該当接によってソケット２４の径方向内側への収縮（縮径）が規制される。ソケット２４の前面５１は、柱状部２６の大径部２６ａの後面２９に当接する。ソケット２４の外周面の第１領域４８が、可動部材２２の内周面の第２領域３６に当接し、ソケット２４の外周面の第２領域４９が、可動部材２２の内周面の第１領域３５に当接し、ソケット２４の段差部５０が、可動部材２２の第１段差部３８に前方から当接する。このように、可動部材２２の第１段差部３８がソケット２４の段差部５０に当接し、且つソケット２４の前面５１が柱状部２６の大径部２６ａの後面２９に当接することによって、ソケット２４が可動部材２２と支持部材２１との間に挟まれて、支持部材２１に対する前方への可動部材２２の移動が規制される。可動部材２２の前端２２ａが、柱状部２６の大径部２６ａの後面２９の位置よりも前方に配置され、可動部材２２のうち柱状部２６の大径部２６ａと重なる領域が、柱状部２６の大径部２６ａの後端部に対してヒューズボルト２５によって固定される。ヒューズボルト２５は、支持部材２１に対する前後方向の（主に後方への）可動部材２２の移動を規制する。可動部材２２は、カラー２３、ソケット２４、及びヒューズボルト２５によって支持部材２１に対する前後方向の移動が規制されて第１規制位置（図２中の実線で示す位置）に保持され、カラー２３、ソケット２４及びヒューズボルト２５を介して柱状部２６に支持される。すなわち、カラー２３、ソケット２４、及びヒューズボルト２５は、支持部材２１に対する可動部材２２の位置を第１規制位置に保持する保持手段として機能する。図２に示すように、ボディ５のフロア部材１２がフレーム２に対して前後方向に移動していない状態で、第１規制位置の可動部材２２は、第１ストッパ１５の前面１８から前方に離間して、第１ストッパ１５の前面１８との間に可動空間５２を区画する。可動空間５２は、車両１の通常走行時に第１ストッパ１５と第２ストッパ１６との相対的な前後方向の移動を許容することにより、通常走行時にフレーム２に対する前方へのフロア部材１２の移動を許容する。 As shown in FIG. 3, during the normal time when the inflator 33 is not operating (hereinafter, simply referred to as the normal time), the rear surface 30 of the small diameter portion 26b of the columnar portion 26 comes into contact with the front surface of the base portion 40 of the collar 23. The front surface of the protruding portion 45 of the collar 23 abuts on the front wall of the groove 32 of the columnar portion 26, thereby restricting the forward movement of the collar 23 with respect to the small diameter portion 26b of the columnar portion 26. Further, the lid portion 41 of the collar 23 is pressed into the opening portion 31 of the columnar portion 26 to press the inner peripheral surface of the opening portion 31 and is in close contact with the inner peripheral surface of the opening portion 31, and the small diameter portion of the columnar portion 26. The rearward movement of the collar 23 with respect to 26b is restricted. In a state where the diameter of the socket 24 is expanded outward in the radial direction, the inner peripheral surface 47 of the socket 24 abuts on the second region 44 of the outer peripheral surface of the collar 23, and the socket 24 contracts inward in the radial direction by the corresponding contact. Diameter reduction) is regulated. The front surface 51 of the socket 24 comes into contact with the rear surface 29 of the large diameter portion 26a of the columnar portion 26. The first region 48 on the outer peripheral surface of the socket 24 abuts on the second region 36 on the inner peripheral surface of the movable member 22, and the second region 49 on the outer peripheral surface of the socket 24 is the first on the inner peripheral surface of the movable member 22. It abuts on the region 35, and the stepped portion 50 of the socket 24 abuts on the first stepped portion 38 of the movable member 22 from the front. In this way, the first step portion 38 of the movable member 22 abuts on the step portion 50 of the socket 24, and the front surface 51 of the socket 24 abuts on the rear surface 29 of the large diameter portion 26a of the columnar portion 26, whereby the socket 24 Is sandwiched between the movable member 22 and the support member 21, and the movement of the movable member 22 forward with respect to the support member 21 is restricted. The front end 22a of the movable member 22 is arranged in front of the position of the rear surface 29 of the large diameter portion 26a of the columnar portion 26, and the region of the movable member 22 that overlaps with the large diameter portion 26a of the columnar portion 26 is the columnar portion 26. It is fixed to the rear end of the large diameter portion 26a by the fuse bolt 25. The fuse bolt 25 regulates the movement of the movable member 22 in the front-rear direction (mainly backward) with respect to the support member 21. The movable member 22 is held in the first regulated position (the position indicated by the solid line in FIG. 2) by restricting the movement of the movable member 22 in the front-rear direction with respect to the support member 21 by the collar 23, the socket 24, and the fuse bolt 25, and the collar 23 and the socket. It is supported by the columnar portion 26 via the 24 and the fuse bolt 25. That is, the collar 23, the socket 24, and the fuse bolt 25 function as holding means for holding the position of the movable member 22 with respect to the support member 21 at the first regulation position. As shown in FIG. 2, in a state where the floor member 12 of the body 5 has not moved in the front-rear direction with respect to the frame 2, the movable member 22 at the first regulation position is separated forward from the front surface 18 of the first stopper 15. Then, the movable space 52 is partitioned from the front surface 18 of the first stopper 15. The movable space 52 allows the relative movement of the first stopper 15 and the second stopper 16 in the front-rear direction during the normal traveling of the vehicle 1, so that the floor member 12 can move forward with respect to the frame 2 during the normal traveling. Tolerate.

図３に示すように、ＥＣＵ１４は、ＣＰＵ（ＣｅｎｔｒａｌＰｒｏｃｅｓｓｉｎｇＵｎｉｔ）５３や記憶部５４を有する。記憶部５４は、例えば、ＲＯＭ（ＲｅａｄＯｎｌｙＭｅｍｏｒｙ）やＲＡＭ（ＲａｎｄｏｍＡｃｃｅｓｓＭｅｍｏｒｙ）などの記録媒体によって構成される。記憶部５４には、ボディ５の減速度の閾値Ｋが予め記憶される。また、記憶部５４には、加速度センサ１３からの情報や各種データなどが読み書き自在に記憶されるデータ記憶領域が予め設定されている。記憶部５４は、上記データ記憶領域以外にも、ＣＰＵ５３の演算結果の一時記憶領域等として機能する。なお、記憶部５４に予め記憶されるボディ５の減速度の閾値Ｋには、車両１が所定の速度で走行中に前面衝突して、第１ストッパ１５の前面１８と第２ストッパ１６の第１規制位置の可動部材２２とが当接した後にフロア部材１２の減速度が増大する際の増大中の所定の値（減速度）が、実験やシミュレーション等によって求められて設定される。 As shown in FIG. 3, the ECU 14 includes a CPU (Central Processing Unit) 53 and a storage unit 54. The storage unit 54 is composed of a recording medium such as a ROM (Read Only Memory) or a RAM (Random Access Memory), for example. The deceleration threshold value K of the body 5 is stored in advance in the storage unit 54. Further, the storage unit 54 is preset with a data storage area in which information from the acceleration sensor 13 and various data are readable and writable. In addition to the data storage area, the storage unit 54 functions as a temporary storage area for the calculation result of the CPU 53 and the like. It should be noted that the deceleration threshold K of the body 5 stored in advance in the storage unit 54 collides with the front surface of the vehicle 1 while traveling at a predetermined speed, and the front surface 18 of the first stopper 15 and the second stopper 16 are the first. A predetermined value (deceleration) during the increase when the deceleration of the floor member 12 increases after the movable member 22 at the restricted position comes into contact with the movable member 22 is obtained and set by an experiment, a simulation, or the like.

ＥＣＵ１４のＣＰＵ５３は、加速度センサ１３からの情報に基づいて、車両１のボディ５の減速度と予め記憶部５４に記憶された閾値Ｋとを比較する。ＣＰＵ５３は、ボディ５の減速度が、閾値Ｋを超えた場合、インフレータ３３に信号を出力してインフレータ３３を作動させる。 The CPU 53 of the ECU 14 compares the deceleration of the body 5 of the vehicle 1 with the threshold value K previously stored in the storage unit 54 based on the information from the acceleration sensor 13. When the deceleration of the body 5 exceeds the threshold value K, the CPU 53 outputs a signal to the inflator 33 to operate the inflator 33.

次に、第２ストッパ１６の動きについて、図４（ａ）〜図４（ｄ）に基づいて説明する。なお、図４（ａ）〜図４（ｄ）には、右側の第１ストッパ１５Ｒと右側の第２ストッパ１６Ｒとが図示されている。図４（ａ）は、第２ストッパ１６に第１ストッパ１５が当接した第１状態を、図４（ｂ）は、インフレータ３３が作動した第２状態を、図４（ｃ）は、ソケット２４が収縮した第３状態を、図４（ｄ）は、可動部材２２が第１規制位置から第２規制位置へ移動した第４状態をそれぞれ示す。 Next, the movement of the second stopper 16 will be described with reference to FIGS. 4 (a) to 4 (d). In addition, in FIGS. 4A to 4D, the first stopper 15R on the right side and the second stopper 16R on the right side are illustrated. FIG. 4A shows the first state in which the first stopper 15 abuts on the second stopper 16, FIG. 4B shows the second state in which the inflator 33 operates, and FIG. 4C shows the socket. FIG. 4D shows a third state in which the 24 is contracted, and FIG. 4D shows a fourth state in which the movable member 22 has moved from the first regulation position to the second regulation position.

図４（ａ）に示す第１状態の第２ストッパ１６は、上述した通常時（インフレータ３３が作動していない時）の状態であり、可動部材２２が、カラー２３、ソケット２４、及びヒューズボルト２５によって支持部材２１に対して第１規制位置に保持される。第２ストッパ１６は、車両１の通常走行時、及び図４（ａ）に示すように車両１が前面衝突して第２ストッパ１６に第１ストッパ１５が当接した後、インフレータ３３が作動するまで第１状態を維持する。第２ストッパ１６は、インフレータ３３が作動すると、第１状態から第２状態へ移行する。 The second stopper 16 in the first state shown in FIG. 4A is in the above-mentioned normal state (when the inflator 33 is not operating), and the movable member 22 has a collar 23, a socket 24, and a fuse bolt. The 25 holds the support member 21 in the first regulation position. The inflator 33 operates in the second stopper 16 during normal traveling of the vehicle 1 and after the vehicle 1 collides with the front surface and the first stopper 15 comes into contact with the second stopper 16 as shown in FIG. 4 (a). The first state is maintained until. When the inflator 33 is activated, the second stopper 16 shifts from the first state to the second state.

図４（ｂ）に示すように、ＥＣＵ１４（図３参照）からの信号によってインフレータ３３が作動すると、インフレータ３３が発生したガスによって支持部材２１の柱状部２６の開口部３１内の圧力が急激に上昇してカラー２３の蓋部４１が後方へ押し出され、カラー２３が柱状部２６の小径部２６ｂに対して後方（図４（ｂ）の矢印方向）へ移動し、第２ストッパ１６が第２状態となる。第２状態では、カラー２３の突出部４５の後面が、柱状部２６の小径部２６ｂの溝部３２の後壁に当接し、この当接によって小径部２６ｂに対する後方へのカラー２３の移動が規制される。カラー２３の後端部は、可動部材２２の内周面の第３領域３７の内側に挿入され、カラー２３の外周面の第１領域４３が、可動部材２２の内周面の第３領域３７に沿って配置される。また、第２状態では、カラー２３の外周面の第２領域４４が、ソケット２４の内周面４７の後端よりも後方へ移動し、カラー２３がソケット２４の縮径の規制を解除する。第２ストッパ１６は、ソケット２４が縮径して、第２状態から第３状態へ移行する。 As shown in FIG. 4B, when the inflator 33 is operated by the signal from the ECU 14 (see FIG. 3), the pressure in the opening 31 of the columnar portion 26 of the support member 21 is suddenly increased by the gas generated by the inflator 33. As it rises, the lid 41 of the collar 23 is pushed rearward, the collar 23 moves rearward (in the direction of the arrow in FIG. 4B) with respect to the small diameter portion 26b of the columnar portion 26, and the second stopper 16 is second. It becomes a state. In the second state, the rear surface of the protruding portion 45 of the collar 23 abuts on the rear wall of the groove 32 of the small diameter portion 26b of the columnar portion 26, and this contact restricts the movement of the collar 23 rearward with respect to the small diameter portion 26b. To. The rear end portion of the collar 23 is inserted inside the third region 37 of the inner peripheral surface of the movable member 22, and the first region 43 of the outer peripheral surface of the collar 23 is the third region 37 of the inner peripheral surface of the movable member 22. It is placed along. Further, in the second state, the second region 44 on the outer peripheral surface of the collar 23 moves rearward from the rear end of the inner peripheral surface 47 of the socket 24, and the collar 23 releases the restriction on the diameter reduction of the socket 24. The diameter of the socket 24 of the second stopper 16 is reduced to shift from the second state to the third state.

図４（ｃ）に示すように、第３状態の第２ストッパ１６は、ソケット２４が径方向内側（図４（ｃ）の矢印方向）へ収縮（縮径）した状態である。第３状態では、ソケット２４が縮径してソケット２４の内周面４７が柱状部２６の小径部２６ｂの外周面に当接する。縮径した状態のソケット２４は、ソケット２４の外周面の第１領域４８の外径が、可動部材２２の内周面の第３領域３７の内径よりも小さく、ソケット２４の外周面の第２領域４９の外径が、可動部材２２の内周面の第３領域３７の内径よりも大きく、且つ可動部材２２の内周面の第２領域３６の内径よりも小さい。ソケット２４の段差部５０は、可動部材２２の第１段差部３８よりも径方向内側に移動して、ソケット２４は、支持部材２１に対する前方への可動部材２２の移動の規制を解除する。第３状態で、ヒューズボルト２５に対して可動部材２２から前方への上記所定の大きさ以上の荷重が入力し、ヒューズボルト２５が破断すると、可動部材２２が支持部材２１に対して前方（図４（ｄ）の矢印方向）へ移動して、第２ストッパ１６が第３状態から第４状態へ移行する。 As shown in FIG. 4C, the second stopper 16 in the third state is in a state in which the socket 24 is contracted (reduced in diameter) inward in the radial direction (in the direction of the arrow in FIG. 4C). In the third state, the diameter of the socket 24 is reduced, and the inner peripheral surface 47 of the socket 24 comes into contact with the outer peripheral surface of the small diameter portion 26b of the columnar portion 26. In the reduced diameter socket 24, the outer diameter of the first region 48 on the outer peripheral surface of the socket 24 is smaller than the inner diameter of the third region 37 on the inner peripheral surface of the movable member 22, and the second outer diameter surface of the socket 24 is second. The outer diameter of the region 49 is larger than the inner diameter of the third region 37 on the inner peripheral surface of the movable member 22, and smaller than the inner diameter of the second region 36 on the inner peripheral surface of the movable member 22. The stepped portion 50 of the socket 24 moves radially inward with respect to the first stepped portion 38 of the movable member 22, and the socket 24 releases the restriction on the movement of the movable member 22 forward with respect to the support member 21. In the third state, when a load of the above-mentioned predetermined size or more is input from the movable member 22 to the fuse bolt 25 and the fuse bolt 25 is broken, the movable member 22 is forward to the support member 21 (FIG. The second stopper 16 shifts from the third state to the fourth state by moving in the direction of the arrow in 4 (d)).

図４（ｄ）に示すように、第４状態の第２ストッパ１６は、可動部材２２が第１規制位置よりも前方の第２規制位置に配置される。図２に示すように、第２規制位置（図２中の二点鎖線で示す位置）は、ボディ５がフレーム２に対して前後方向に移動していない状態における第１ストッパ１５の前面１８から、第１規制位置（図２中の実線で示す位置）よりもさらに前方の位置である。図４（ｄ）に示すように、第４状態では、ソケット２４の後端部が、可動部材２２の内周面の第３領域３７の内側に挿入され、ソケット２４の外周面の第１領域４８が、可動部材２２の内周面の第３領域３７に沿って配置される。また、可動部材２２の第２段差部３９がソケット２４の段差部５０に後方から当接し、且つソケット２４の前面５１が柱状部２６の大径部２６ａの後面２９に当接することによって、支持部材２１に対する前方への可動部材２２の移動が第２規制位置に規制される。すなわち、第２規制位置の可動部材２２は、ソケット２４を介して支持部材２１に支持される。 As shown in FIG. 4D, in the second stopper 16 in the fourth state, the movable member 22 is arranged at the second regulation position in front of the first regulation position. As shown in FIG. 2, the second regulated position (the position indicated by the alternate long and short dash line in FIG. 2) is from the front surface 18 of the first stopper 15 in a state where the body 5 is not moving in the front-rear direction with respect to the frame 2. , A position further forward than the first regulated position (the position shown by the solid line in FIG. 2). As shown in FIG. 4D, in the fourth state, the rear end portion of the socket 24 is inserted inside the third region 37 of the inner peripheral surface of the movable member 22, and the first region of the outer peripheral surface of the socket 24 is inserted. 48 is arranged along the third region 37 on the inner peripheral surface of the movable member 22. Further, the second step portion 39 of the movable member 22 abuts on the step portion 50 of the socket 24 from behind, and the front surface 51 of the socket 24 abuts on the rear surface 29 of the large diameter portion 26a of the columnar portion 26. The movement of the movable member 22 forward with respect to 21 is restricted to the second regulation position. That is, the movable member 22 at the second regulation position is supported by the support member 21 via the socket 24.

次に、車両１の着座シート８に乗員が着座してシートベルト９０（図１（ａ）参照）を締めた状態で、車両１が通常走行中に前面衝突した場合について説明する。 Next, a case where the vehicle 1 collides with the front during normal traveling with the occupant seated on the seat 8 of the vehicle 1 and the seat belt 90 (see FIG. 1A) is fastened will be described.

図５に示すように、車両１が衝突物１００に前面衝突すると、先ずフレーム２（図１（ａ）参照）の前端部が衝突物１００に衝突し、フレーム２の減速度が急激に増大し、ボディ５のフロア部材１２（図１（ａ）参照）が慣性によってフレーム２に対して前方へ移動する。フロア部材１２が前方へ移動すると、フロア部材１２側の第１ストッパ１５が、フレーム２側の第１状態（図４（ａ）参照）の第２ストッパ１６の可動部材２２に当接し、第２ストッパ１６に対する前方への第１ストッパ１５の移動が規制され、フレーム２に対する前方へのフロア部材１２の移動が規制されてボディ５の減速度が急激に増大する。ボディ５の減速度が急激に増大すると、乗員は、シートベルト９０が効き始めるまで着座シート８に対して前方へ慣性によって移動し、乗員の速度は、着座シート８側（フロア部材１２側）の速度よりも速くなる。ボディ５の減速度が急激に増大して閾値Ｋを超えて、ＥＣＵ１４が、インフレータ３３を作動させると、カラー２３が支持部材２１に対して後方へ移動して（図４（ｂ）参照）、ソケット２４が縮径し（図４（ｃ）参照）、ヒューズボルト２５が破断して、可動部材２２が支持部材２１に対して前方へ移動する。すなわち、カラー２３、ソケット２４、及びヒューズボルト２５による支持部材２１に対する可動部材２２の第１規制位置への保持は、車両１が前面衝突して、第１規制位置の第２ストッパ１６の可動部材２２と第１ストッパ１５の前面１８とが当接した後、ボディ５の減速度が閾値Ｋを超えたとき（所定のタイミング）に、ＥＣＵ１４によるインフレータ３３の作動によって解除される。可動部材２２が支持部材２１に対して前方へ移動すると、この移動に伴ってボディ５側（車体側）がフレーム２に対して前方へ移動し、可動部材２２が第２規制位置に到達すると（図４（ｄ）参照）、フレーム２に対する前方へのボディ５の移動が再度規制される。 As shown in FIG. 5, when the vehicle 1 collides with the colliding object 100 in front, the front end portion of the frame 2 (see FIG. 1A) first collides with the colliding object 100, and the deceleration of the frame 2 rapidly increases. , The floor member 12 of the body 5 (see FIG. 1A) moves forward with respect to the frame 2 due to inertia. When the floor member 12 moves forward, the first stopper 15 on the floor member 12 side comes into contact with the movable member 22 of the second stopper 16 in the first state (see FIG. 4A) on the frame 2 side, and the second stopper 15 The forward movement of the first stopper 15 with respect to the stopper 16 is restricted, the forward movement of the floor member 12 with respect to the frame 2 is restricted, and the deceleration of the body 5 is rapidly increased. When the deceleration of the body 5 suddenly increases, the occupant moves forward with respect to the seating seat 8 by inertia until the seatbelt 90 starts to work, and the speed of the occupant is on the seating seat 8 side (floor member 12 side). Faster than speed. When the deceleration of the body 5 rapidly increases and exceeds the threshold value K and the ECU 14 activates the inflator 33, the collar 23 moves rearward with respect to the support member 21 (see FIG. 4B). The diameter of the socket 24 is reduced (see FIG. 4C), the fuse bolt 25 is broken, and the movable member 22 moves forward with respect to the support member 21. That is, in the holding of the movable member 22 to the support member 21 by the collar 23, the socket 24, and the fuse bolt 25 at the first regulated position, the vehicle 1 collides with the front surface and the movable member of the second stopper 16 at the first regulated position is held. After the 22 and the front surface 18 of the first stopper 15 come into contact with each other, when the deceleration of the body 5 exceeds the threshold value K (predetermined timing), the inflator 33 is released by the operation of the ECU 14. When the movable member 22 moves forward with respect to the support member 21, the body 5 side (vehicle body side) moves forward with respect to the frame 2 along with this movement, and when the movable member 22 reaches the second regulation position ( (See FIG. 4D), the forward movement of the body 5 with respect to the frame 2 is restricted again.

上記のように構成されたストッパ装置１０では、車両１が前面衝突して、第１規制位置の第２ストッパ１６の可動部材２２と第１ストッパ１５の前面１８とが当接した後、ボディ５の減速度が閾値Ｋを超えるまでは、可動部材２２が第１規制位置に保持されるので、その間、ボディ５側の運動エネルギーをフレーム２側で消費することができる。 In the stopper device 10 configured as described above, the vehicle 1 collides with the front surface, and after the movable member 22 of the second stopper 16 at the first regulation position and the front surface 18 of the first stopper 15 come into contact with each other, the body 5 Since the movable member 22 is held in the first regulated position until the deceleration of the body exceeds the threshold value K, the kinetic energy on the body 5 side can be consumed on the frame 2 side during that time.

また、車両１が前面衝突して、第１規制位置の第２ストッパ１６の可動部材２２と第１ストッパ１５の前面１８とが当接した後、ボディ５の減速度が閾値Ｋを超えた時に、支持部材２１に対する可動部材２２の第１規制位置への保持を解除する。このため、フレーム２に対する前方へのボディ５の移動が許容され、ボディ５の減速度が減少してボディ５の速度低下が抑制される。その一方で、シートベルト９０が効き始めると、乗員が着座シート８側に拘束されるので、乗員の減速度が増大して減速し始める。このように、ボディ５の減速度が減少する一方で、乗員の減速度が増大するので、乗員と着座シート８との速度差を小さくすることができる。その後、第２規制位置に到達した可動部材２２が、フレーム２に対する前方へのボディ５の移動を再度規制する。すなわち、乗員とボディ５側の着座シート８との速度差を小さくした状態で、乗員をシートベルト９０によって着座シート８に拘束してボディ５を減速させることができるので、車両１の前面衝突時に乗員の運動エネルギーを車体等（フレーム２を含む）の破損エネルギーで消費させる効率（ライドダウン効率）を高めることができ、乗員の傷害値指標の一つである乗員の最大減速度を低減して乗員の傷害を低減することができる。 Further, when the deceleration of the body 5 exceeds the threshold value K after the vehicle 1 collides with the front surface and the movable member 22 of the second stopper 16 at the first regulation position and the front surface 18 of the first stopper 15 come into contact with each other. , The holding of the movable member 22 to the support member 21 at the first regulation position is released. Therefore, the movement of the body 5 forward with respect to the frame 2 is allowed, the deceleration of the body 5 is reduced, and the speed reduction of the body 5 is suppressed. On the other hand, when the seat belt 90 starts to work, the occupant is restrained on the seating seat 8 side, so that the deceleration of the occupant increases and the vehicle starts decelerating. In this way, while the deceleration of the body 5 decreases, the deceleration of the occupant increases, so that the speed difference between the occupant and the seat 8 can be reduced. After that, the movable member 22 that has reached the second regulation position restricts the movement of the body 5 forward with respect to the frame 2 again. That is, with the speed difference between the occupant and the seat 8 on the body 5 side reduced, the occupant can be restrained by the seat belt 90 on the seat 8 to decelerate the body 5, so that the body 5 can be decelerated at the time of a frontal collision of the vehicle 1. It is possible to increase the efficiency (ridedown efficiency) of consuming the kinetic energy of the occupant with the damaged energy of the vehicle body (including the frame 2), and reduce the maximum deceleration of the occupant, which is one of the occupant's injury value indexes. It is possible to reduce occupant injury.

また、車両１の通常走行時に、第１規制位置の可動部材２２が、カラー２３、ソケット２４、及びヒューズボルト２５によって第１規制位置に保持され、第１規制位置の可動部材２２と第１ストッパ１５の前面１８との間の可動空間５２が、第１ストッパ１５と第２ストッパ１６との相対的な前後方向の移動を許容し、通常走行時のフレーム２に対するボディ５の前方への移動が許容される。このため、車両１の通常走行時に、フレーム２に弾性支持されたフロア部材１２がフレーム２に対して前方へ移動した場合であっても、第１ストッパ１５と第２ストッパ１６とが干渉せず、フレーム２によるフロア部材１２の弾性支持が損なわれることがないので、車両１の通常走行時の乗り心地の低下を抑制することができる。 Further, during normal traveling of the vehicle 1, the movable member 22 at the first regulated position is held at the first regulated position by the collar 23, the socket 24, and the fuse bolt 25, and the movable member 22 and the first stopper at the first regulated position are held. The movable space 52 between the front surface 18 of the 15 allows the relative movement of the first stopper 15 and the second stopper 16 in the front-rear direction, so that the body 5 can move forward with respect to the frame 2 during normal driving. Permissible. Therefore, even when the floor member 12 elastically supported by the frame 2 moves forward with respect to the frame 2 during normal traveling of the vehicle 1, the first stopper 15 and the second stopper 16 do not interfere with each other. Since the elastic support of the floor member 12 by the frame 2 is not impaired, it is possible to suppress a decrease in riding comfort of the vehicle 1 during normal traveling.

なお、本実施形態では、車両１が前面衝突して、第１規制位置の第２ストッパ１６の可動部材２２と第１ストッパ１５の前面１８とが当接した後、ボディ５の減速度が閾値Ｋを超えたとき（所定のタイミング）に、支持部材２１に対する可動部材２２の第１規制位置への保持を解除したが、これに限定されるものではない。本発明における上記所定のタイミングとは、第１規制位置の第２ストッパ１６の可動部材２２と第１ストッパ１５の前面１８とが当接した後に、所定の条件を満たしたとき（本実施形態では、ボディ５の減速度が閾値Ｋを超えたとき）という意味である。例えば、第１規制位置の第２ストッパ１６の可動部材２２と第１ストッパ１５の前面１８とが当接した後、所定の時間が経過したときであってもよい。また、上記所定の条件を満たすか否かを判定する所定の閾値（上記閾値Ｋや上記所定の時間など）は、車両１の車速に応じて変化する値であってもよい。例えば、車両１に車速検出手段（車速センサ等）を設け、車速に対応する様々な所定の閾値を記憶部５４に予め記憶し、車両１の前面衝突時の車速に応じた上記所定の閾値を用いて、上記所定の条件を満たすか否かを判定してもよい。また、上記所定の閾値は、車両１の衝突状態（例えば、車両１の前面の略全域が衝突物１００と衝突するフルラップ衝突や、車両１の前面のうちの車幅方向の一側が衝突物１００と衝突するオフセット衝突）に応じて変化する値であってもよい。また、乗員とボディ５との速度差を小さくするために可動部材２２の移動規制を解除する最適な上記所定のタイミングは、車両の諸元（シートベルト９０の性能やボディ５のつぶれ構造等）によって異なるので、その車両に応じたタイミングを実験やシミュレーション等によって求めて、求めたタイミングに応じた上記所定の閾値を設定してもよい。 In the present embodiment, after the vehicle 1 collides with the front surface and the movable member 22 of the second stopper 16 at the first regulation position and the front surface 18 of the first stopper 15 come into contact with each other, the deceleration of the body 5 is a threshold value. When K is exceeded (predetermined timing), the holding of the movable member 22 with respect to the support member 21 at the first regulation position is released, but the present invention is not limited to this. The predetermined timing in the present invention is when the predetermined condition is satisfied after the movable member 22 of the second stopper 16 at the first regulation position and the front surface 18 of the first stopper 15 come into contact with each other (in the present invention). , When the deceleration of the body 5 exceeds the threshold value K). For example, a predetermined time may elapse after the movable member 22 of the second stopper 16 at the first regulated position and the front surface 18 of the first stopper 15 come into contact with each other. Further, the predetermined threshold value (such as the threshold value K and the predetermined time) for determining whether or not the predetermined condition is satisfied may be a value that changes according to the vehicle speed of the vehicle 1. For example, a vehicle speed detecting means (vehicle speed sensor or the like) is provided in the vehicle 1, various predetermined threshold values corresponding to the vehicle speed are stored in advance in the storage unit 54, and the predetermined threshold value corresponding to the vehicle speed at the time of a frontal collision of the vehicle 1 is stored. It may be used to determine whether or not the above-mentioned predetermined conditions are satisfied. Further, the predetermined threshold value is a collision state of the vehicle 1 (for example, a full-wrap collision in which substantially the entire front surface of the vehicle 1 collides with the collision object 100, or a collision object 100 on one side of the front surface of the vehicle 1 in the vehicle width direction. It may be a value that changes according to (offset collision) that collides with. Further, the optimum timing for releasing the movement restriction of the movable member 22 in order to reduce the speed difference between the occupant and the body 5 is the vehicle specifications (performance of the seat belt 90, the collapsed structure of the body 5, etc.). Since it differs depending on the vehicle, the timing corresponding to the vehicle may be obtained by an experiment, a simulation, or the like, and the above-mentioned predetermined threshold value may be set according to the obtained timing.

また、本実施形態では、インフレータ３３を設け、インフレータ３３が発生したガスによって支持部材２１の柱状部２６の開口部３１内からカラー２３の蓋部４１を後方へ押し出したが、カラー２３を後方へ移動させる方法は、これに限定されるものではない。例えば、柱状部２６の開口部３１内に、カラー２３の蓋部４１を直接的に後方へ押圧可能な押圧部材を設け、この押圧部材を後方へ移動させることによってカラー２３を後方へ移動させてもよい。 Further, in the present embodiment, the inflator 33 is provided, and the gas generated by the inflator 33 pushes the lid portion 41 of the collar 23 rearward from the inside of the opening 31 of the columnar portion 26 of the support member 21, but the collar 23 is pushed rearward. The method of moving is not limited to this. For example, a pressing member capable of directly pressing the lid portion 41 of the collar 23 rearward is provided in the opening 31 of the columnar portion 26, and the collar 23 is moved rearward by moving this pressing member rearward. May be good.

また、支持部材２１の形状や構造は、上記に限定されるものではなく、第１ストッパ１５の前面１８から前方へ離間して対向する位置に配置されてサイドメンバ３に固定されるものであればよい。 Further, the shape and structure of the support member 21 are not limited to the above, and may be arranged at positions facing the front surface 18 of the first stopper 15 so as to be separated from the front surface 18 and fixed to the side member 3. Just do it.

また、可動部材２２の形状や構造は、上記に限定されるものではなく、支持部材２１と第１ストッパ１５の前面１８との間に配置され、支持部材２１に前後方向に移動可能に支持されるものであればよい。 Further, the shape and structure of the movable member 22 are not limited to the above, and are arranged between the support member 21 and the front surface 18 of the first stopper 15, and are supported by the support member 21 so as to be movable in the front-rear direction. Anything is fine.

次に、本発明の第２実施形態を図面に基づいて説明する。なお、第２実施形態に係るストッパ装置６０は、加速度センサ１３とＥＣＵ１４とを備えない点、及び第２ストッパ６１の構造が上記第１実施形態に係るストッパ装置１０と異なる。また、第１実施形態と同様の構成については、同一の符号を付してその説明を省略する。 Next, a second embodiment of the present invention will be described with reference to the drawings. The stopper device 60 according to the second embodiment is different from the stopper device 10 according to the first embodiment in that the acceleration sensor 13 and the ECU 14 are not provided and the structure of the second stopper 61 is different. Further, the same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

図６（ａ）及び図６（ｂ）に示すように、第２ストッパ６１は、支持部材（支持部）６２と、可動部材（可動部）６３と、ヒューズボルト（保持手段）６４とを有する。 As shown in FIGS. 6A and 6B, the second stopper 61 has a support member (support portion) 62, a movable member (movable portion) 63, and a fuse bolt (holding means) 64. ..

支持部材６２は、金属製の部材であって、サイドメンバ３の車幅方向外側面２０から車幅方向外側に離間し、且つ第１ストッパ１５の前面１８から前方へ離間した位置に配置されて前後方向に延びる柱状部６５を有する。柱状部６５の前端部は、サイドメンバ３の車幅方向外側面２０に対して固定される。 The support member 62 is a metal member, and is arranged at a position separated from the outer side surface 20 in the vehicle width direction of the side member 3 outward in the vehicle width direction and forward from the front surface 18 of the first stopper 15. It has a columnar portion 65 extending in the front-rear direction. The front end portion of the columnar portion 65 is fixed to the outer surface 20 of the side member 3 in the vehicle width direction.

可動部材６３は、金属製の部材であって、前方へ開口する有底の筒状に形成される。可動部材６３の内周面６６は、可動部材６３の前端の開口６７から連続して後方へ直線状に延び、可動部材６３の内径は、支持部材６２の挿入を許容するように、支持部材６２の外形よりも僅かに大きく形成される。可動部材６３は、支持部材６２の柱状部６５と第１ストッパ１５の前面１８との間に配置される。図６（ａ）に示すように、可動部材６３には、開口６７から柱状部６５の後端部が挿入され、可動部材６３の底面６９（内部の後壁の前面）と柱状部６５の後面６８との間に空間７０を区画した状態で、可動部材６３が、ヒューズボルト６４によって柱状部２６に固定され、柱状部２６に支持される。可動部材６３がヒューズボルト６４によって柱状部２６に固定されていない状態では、可動部材６３は、柱状部２６に前後方向にスライド移動自在に支持される。 The movable member 63 is a metal member and is formed in a bottomed tubular shape that opens forward. The inner peripheral surface 66 of the movable member 63 continuously extends linearly rearward from the opening 67 at the front end of the movable member 63, and the inner diameter of the movable member 63 allows the support member 62 to be inserted. It is formed slightly larger than the outer shape of. The movable member 63 is arranged between the columnar portion 65 of the support member 62 and the front surface 18 of the first stopper 15. As shown in FIG. 6A, the rear end portion of the columnar portion 65 is inserted into the movable member 63 from the opening 67, and the bottom surface 69 (front surface of the inner rear wall) and the rear surface of the columnar portion 65 of the movable member 63. The movable member 63 is fixed to the columnar portion 26 by the fuse bolt 64 and supported by the columnar portion 26 in a state where the space 70 is partitioned between the space 70 and the 68. In a state where the movable member 63 is not fixed to the columnar portion 26 by the fuse bolt 64, the movable member 63 is supported by the columnar portion 26 so as to be slidably movable in the front-rear direction.

ヒューズボルト６４は、所定の大きさ以上の荷重が入力した際に破断可能なボルトであって、支持部材６２に対する可動部材６３の位置を第１規制位置（図６（ａ）に示す可動部材６３の位置）に保持する。第１規制位置の可動部材６３は、第１ストッパ１５の前面１８から前方に離間して、第１ストッパ１５の前面１８との間に可動空間５２を区画する。これにより、第２ストッパ６１の可動部材６３は、車両１の通常走行時、及び車両１が前面衝突してヒューズボルト６４が破断するまで、支持部材６２に対する位置がヒューズボルト６４によって第１規制位置に保持される。 The fuse bolt 64 is a bolt that can be broken when a load of a predetermined size or more is input, and the position of the movable member 63 with respect to the support member 62 is the first regulated position (the movable member 63 shown in FIG. 6A). Hold in the position of). The movable member 63 at the first regulated position is separated forward from the front surface 18 of the first stopper 15 and partitions the movable space 52 with the front surface 18 of the first stopper 15. As a result, the movable member 63 of the second stopper 61 is positioned with respect to the support member 62 by the fuse bolt 64 during normal traveling of the vehicle 1 and until the vehicle 1 collides with the front surface and the fuse bolt 64 is broken. Is held in.

車両１が前面衝突してフレーム２の前端部が衝突物１００に衝突し、フレーム２に対してボディ５が前方へ移動すると、ボディ５側の第１ストッパ１５が、フレーム２側の第２ストッパ６１の第１規制位置の可動部材６３に当接する（図６（ａ）の二点鎖線参照）。ヒューズボルト６４は、可動部材６３を介して入力する第１ストッパ１５側からの荷重が上記所定の大きさ以上になるまで、支持部材６２に対して可動部材６３を第１規制位置に保持し、前記荷重が上記所定の大きさ以上になると破断する。ヒューズボルト６４の破断によって、支持部材６２に対する第１規制位置への可動部材６３の保持が解除される。すなわち、ヒューズボルト６４による支持部材６２に対する可動部材６３の第１規制位置への保持は、車両１が前面衝突した際に、第１規制位置の第２ストッパ６１の可動部材６３と第１ストッパ１５の前面１８とが当接した後、第１ストッパ１５側からの荷重が上記所定の大きさ以上になったとき（所定のタイミング）に解除される。支持部材６２に対する第１規制位置への可動部材６３の保持が解除されると、可動部材６３が、第１ストッパ１５に押されて支持部材６２に対して前方へ移動し、可動部材６３の底面６９と柱状部６５の後面６８とが当接する（図６（ｂ）参照）。これにより、支持部材６２に対する前方への可動部材６３の移動が第２規制位置（図６（ｂ）に示す可動部材６３の位置）に規制される。第２規制位置の可動部材６３は、支持部材６２に前方から支持されて、前方への第１ストッパ１５の移動を規制する。 When the vehicle 1 collides in front and the front end of the frame 2 collides with the colliding object 100 and the body 5 moves forward with respect to the frame 2, the first stopper 15 on the body 5 side becomes the second stopper on the frame 2 side. It abuts on the movable member 63 at the first regulated position of 61 (see the alternate long and short dash line in FIG. 6A). The fuse bolt 64 holds the movable member 63 in the first regulated position with respect to the support member 62 until the load from the first stopper 15 side input via the movable member 63 becomes equal to or more than the above-mentioned predetermined size. When the load exceeds the predetermined magnitude, the fuse breaks. When the fuse bolt 64 is broken, the movable member 63 is released from being held at the first restricted position with respect to the support member 62. That is, the fuse bolt 64 holds the movable member 63 to the support member 62 at the first regulated position when the vehicle 1 collides with the front surface of the movable member 63 and the first stopper 15 of the second stopper 61 at the first regulated position. The load from the first stopper 15 side is released when the load from the first stopper 15 side becomes equal to or more than the predetermined magnitude (predetermined timing) after the front surface 18 is brought into contact with the front surface 18. When the holding of the movable member 63 to the first restricted position with respect to the support member 62 is released, the movable member 63 is pushed by the first stopper 15 and moves forward with respect to the support member 62, and the bottom surface of the movable member 63 is released. The 69 and the rear surface 68 of the columnar portion 65 come into contact with each other (see FIG. 6B). As a result, the movement of the movable member 63 forward with respect to the support member 62 is restricted to the second restricted position (the position of the movable member 63 shown in FIG. 6B). The movable member 63 at the second regulation position is supported by the support member 62 from the front and restricts the movement of the first stopper 15 forward.

上記のように構成されたストッパ装置６０では、車両１が前面衝突した際に、第１規制位置の第２ストッパ６１の可動部材６３と第１ストッパ１５の前面１８とが当接した後、第１ストッパ１５側からの荷重が上記所定の大きさ以上になったときにヒューズボルト６４が破断して、支持部材６２に対する第１規制位置への可動部材６３の保持を解除する。このため、支持部材６２に対する第１規制位置への可動部材６３の保持を解除するインフレータや、該インフレータを制御するためのＥＣＵ等を設ける必要がなく、ストッパ装置６０を簡易な構造にすることができる。 In the stopper device 60 configured as described above, when the vehicle 1 collides with the front surface, the movable member 63 of the second stopper 61 at the first regulation position and the front surface 18 of the first stopper 15 come into contact with each other, and then the first stopper device 60 is used. 1 When the load from the stopper 15 side becomes equal to or greater than the above-mentioned predetermined size, the fuse bolt 64 is broken to release the holding of the movable member 63 with respect to the support member 62 at the first regulation position. Therefore, it is not necessary to provide an inflator for releasing the holding of the movable member 63 to the first regulation position with respect to the support member 62, an ECU for controlling the inflator, or the like, and the stopper device 60 can have a simple structure. it can.

以上、本発明について、上記実施形態に基づいて説明を行ったが、本発明は上記実施形態の内容に限定されるものではなく、当然に本発明を逸脱しない範囲で適宜変更が可能である。すなわち、この実施形態に基づいて当業者等によりなされる他の実施形態、実施例および運用技術等は全て本発明の範疇に含まれることは勿論である。 Although the present invention has been described above based on the above-described embodiment, the present invention is not limited to the contents of the above-described embodiment, and can be appropriately modified without departing from the present invention. That is, it goes without saying that all other embodiments, examples, operational techniques, and the like made by those skilled in the art based on this embodiment are included in the category of the present invention.

例えば、上記第１実施形態及び上記第２実施形態では、第１ストッパ１５を、フロア部材１２側（一方側）に固定し、第２ストッパ１６，６１の支持部材２１，６２を、第１ストッパ１５の前面１８よりも前方に配置してフレーム２側（他方側）に固定したが、これに限定されるものではなく、フレーム２側のストッパがフロア部材１２側のストッパよりも前方に配置されていればよい。すなわち、第１ストッパ１５を、フレーム２側（一方側）に固定し、第２ストッパ１６，６１の支持部材２１，６２を、第１ストッパ１５の後面（対向面）よりも後方に配置してフロア部材１２側（他方側）に固定してもよい。 For example, in the first embodiment and the second embodiment, the first stopper 15 is fixed to the floor member 12 side (one side), and the support members 21 and 62 of the second stoppers 16 and 61 are attached to the first stopper. It was arranged in front of the front surface 18 of 15 and fixed to the frame 2 side (the other side), but the present invention is not limited to this, and the stopper on the frame 2 side is arranged in front of the stopper on the floor member 12 side. I just need to be there. That is, the first stopper 15 is fixed to the frame 2 side (one side), and the support members 21 and 62 of the second stoppers 16 and 61 are arranged behind the rear surface (opposing surface) of the first stopper 15. It may be fixed to the floor member 12 side (the other side).

また、上記第１実施形態及び上記第２実施形態では、支持部材２１，６２に対して可動部材２２，６３を第１規制位置に保持する保持手段を、第２ストッパ１６，６１に設けたが、第２ストッパとは別体の保持装置（保持手段）を設けてもよい。 Further, in the first embodiment and the second embodiment, the second stoppers 16 and 61 are provided with holding means for holding the movable members 22 and 63 at the first restricted position with respect to the support members 21 and 62. , A holding device (holding means) separate from the second stopper may be provided.

また、可動部材２２，６３を支持部材２１，６２に対して第１規制位置に保持する保持手段や、上記所定のタイミングで支持部材２１，６２に対する可動部材２２，６３の第１規制位置への保持を解除する方法は、上記第１実施形態及び上記第２実施形態に限定されない。 Further, the holding means for holding the movable members 22 and 63 at the first regulated position with respect to the support members 21 and 62, and the movable members 22 and 63 with respect to the support members 21 and 62 at the first regulated position at the predetermined timing. The method of releasing the holding is not limited to the first embodiment and the second embodiment.

１：車両
２：フレーム
１０，６０：ストッパ装置
１１：車室
１２：フロア部材
１５：第１ストッパ
１６，６１：第２ストッパ
１８：第１ストッパの前面（対向面）
２１，６２：支持部材（支持部）
２２，６３：可動部材（可動部）
２３：カラー（保持手段）
２４：ソケット（保持手段）
２５，６４：ヒューズボルト（保持手段）
５２：可動空間 1: Vehicle 2: Frames 10, 60: Stopper device 11: Vehicle interior 12: Floor member 15: First stopper 16, 61: Second stopper 18: Front surface (opposing surface) of the first stopper
21,62: Support member (support part)
22,63: Movable member (movable part)
23: Color (holding means)
24: Socket (holding means)
25, 64: Fuse bolt (holding means)
52: Movable space

Claims

A stopper device for a vehicle with a frame in which the floor member that partitions the lower part of the passenger compartment is elastically supported by the frame.
A first stopper having a facing surface intersecting the front-rear direction and being fixed to one side of the frame or the floor member,
A support portion arranged at a position facing away from the facing surface of the first stopper and fixed to the other side of the frame or the floor member, and the supporting portion and the facing surface of the first stopper. A first regulation position having a movable portion arranged between the movable portions and supported by the support portion, and the movable portion separating from the facing surface and partitioning a movable space from the facing surface, and the above-mentioned A second stopper that can move in the front-rear direction with respect to the support portion between the first regulation position and the second regulation position on the support portion side.
A holding means for holding the position of the movable portion of the second stopper with respect to the support portion at the first restricted position during normal traveling of the vehicle is provided.
Of the first stopper or the second stopper, the stopper on the floor member side is arranged behind the stopper on the frame side.
The movable space allows the relative movement of the second stopper and the first stopper in the front-rear direction.
In the holding of the movable portion with respect to the support portion by the holding means, the vehicle collides with the front surface, the floor member moves forward with respect to the frame, and the movable portion of the second stopper at the first regulation position. Is released at a predetermined timing after the contact surface of the first stopper with the facing surface of the first stopper.
A stopper device for a vehicle with a frame, wherein the movable portion of the second stopper at the second regulation position is supported by the support portion to restrict the movement of the first stopper to the support portion side. ..