JP3541441B2 - Vehicle seat structure - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a vehicle seat structure such as a rear box of a third row of a one-box type.
[0002]
[Prior art]
DESCRIPTION OF RELATED ART Conventionally, as a seat apparatus of the vehicle comprised so that folding is possible, there exists an apparatus of Unexamined-Japanese-Patent No. 62-174945, for example. That is, a seatback is mounted on a vehicle body via a hinge member so as to be able to undulate, a seat cushion is connected to the seatback so as to be openable and closable, and the seat can be folded on a floor when the seat is not used. It is a seat device.
On the other hand, as described in Japanese Utility Model Laid-Open No. Sho 62-166758, an apparatus in which a seat is arranged in the third row of a one-box type vehicle is already known.
[0003]
Therefore, when these two devices are combined, a structure in which the seat in the third row of the one-box type vehicle is folded on the floor at the rearmost portion of the vehicle is formed. Problems arise.
In other words, there is a problem that the seat folded on the floor at the rearmost portion of the vehicle jumps in the direction of the seat in the second row on the vehicle interior side at the time of rear collision of the vehicle.
[0004]
[Problems to be solved by the invention]
The present invention is configured such that a rearmost floor of a vehicle is guided downward at the time of a rear collision, and a seat folded on the rearmost floor of the vehicle and a part of the floor are engaged at the time of a rear collision. With the configuration , the seat-side engaging member is provided at the rear end of the seat when retracted, and the vehicle-side engaging member is attached to the rear of the seat-side engaging member at a predetermined distance away from the vehicle, thereby causing the vehicle to collide. The engagement member described above is securely engaged with the seat-side engagement member by the initial load of the rear collision, and the seat is pushed down following the rear collision behavior of the rearmost floor of the vehicle. It is an object of the present invention to provide a vehicle seat structure capable of reliably preventing a seat from jumping into a vehicle interior.
[0005]
One embodiment of the present invention, by forming the break portion to the floor or the spare tire pan of the vehicle rearmost between the side surface of the sheet at the time of storage and the rear side frames, the該破cross section in the vehicle rear collision It is an object of the present invention to provide a vehicle seat structure in which a rear impact load is concentrated and the broken portion is positively broken so that the floor at the rearmost portion of the vehicle or the spare tire pan can be guided more reliably downward.
[0006]
[Means for Solving the Problems]
Seat structure for a vehicle according to the invention, the rear-end collision with a seat structure for a vehicle having a structure for guiding the floor of the vehicle rearmost downward, center the seat and seat back, the lower end of the seat back when storing The seat back is pivoted rearward and pivotally supports a foldable pivot on the rearmost floor or spare tire pan, and a foldable seat cushion is provided on the seat back. An engaging member is provided at an upper rear end, and an engaging member facing the engaging member in the front-rear direction of the vehicle when the seat is stored is disposed on the rearmost floor of the vehicle or on a spare tire pan. The engaging member and the engaging member are engaged with each other at a predetermined distance behind the member so that the engaging member and the engaging member are engaged during a rear collision of the vehicle.
[0007]
One embodiment of the present invention is to concentrate a rear impact load on a rear tire floor or a spare tire pan between a rear side frame extending in the front-rear direction of the vehicle body and a side surface of the seat at the time of storage. A break portion for breaking the floor or the spare tire pan is formed .
[0008]
Function and effect of the present invention
According to the present invention, in a configuration in which the rearmost floor of the vehicle is guided downward at the time of a rear collision, a seat folded on the rearmost floor of the vehicle and a part of the floor are engaged at the time of a rear collision. The seat side engaging member is provided at the rear end of the seat when retracted, and the vehicle body side engaging member is attached at a predetermined distance behind the seat side engaging member, so that the vehicle is mounted. The above-mentioned engaging member is securely engaged with the seat-side engaging member by the initial load of the rear collision at the time of the rear collision, and the floor at the rearmost portion of the vehicle is guided downward while maintaining this engaged state.
[0009]
As a result, following the rearward collision behavior (downward deformation) of the rearmost floor of the vehicle or the spare tire pan due to further rear impact load input, the above-mentioned seat is moved by the engagement member via the engagement member. reliably and pushed downward, the sheet can be prevented reliably from jumps into the vehicle interior side, there is an effect that more can be performed even better protection of the rear seat occupants.
[0010]
According to one embodiment of the present invention, a rear impact load is concentrated on a rear tire floor or a spare tire pan between a rear side frame extending in a front-rear direction of a vehicle body and a side surface of the seat when the vehicle is stored. Since a break portion for breaking the last floor or the spare tire pan is formed, a rear impact load is concentrated on the break portion at the time of a rear collision of the vehicle, so that the break portion can be actively broken. As a result, there is an effect that the floor at the rearmost portion of the vehicle or the spare tire pan can be more reliably guided downward and the seat can be prevented from jumping up.
[0011]
【Example】
An embodiment of the present invention will be described below in detail with reference to the drawings.
The drawing shows a seat structure of the vehicle. In FIG. 1, a first-row seat 2 composed of a driver's seat and a passenger's seat is provided in a cabin of a one-box type vehicle 1 and a rear portion of the first-row seat 2. , And a third-row seat 4 located behind the second-row seat 3 and configured to be foldable.
[0012]
The above-described third row sheet 4 is configured as shown in FIGS.
That is, the seat 4 in the third row has a seat back frame 5 formed by bending a metal pipe member into a gate shape,
At the lower part of the seat back frame 5, left and right flat portions 6, 6 formed by flattening the above-described metal pipe member,
An anchor frame 7 made of a metal pipe stretched horizontally between the upper portions of the left and right flat portions 6, 6;
A metal pipe square frame-shaped seat cushion frame 9 that is openably and closably connected to the anchor frame 7 via two sets of hinge members 8, 8 including a hemel hinge member, a mail hinge member, and a hinge pin;
A leg frame 11 made of a metal pipe and connected to a predetermined portion of the seat cushion frame 9 via pivot means 10 so as to be openable and closable;
A metal round bar striker 12, 12 as an engagement member (seat-side engagement member) attached to two upper rear ends of the seat back frame 5;
A cushion in which the belt webbing 13 is stretched in a grid pattern over the entire space surrounded by the above-described gate-shaped seat back frame 5 and the anchor frame 7 and the entire space surrounded by the above-described square frame-shaped seat cushion frame 9. And a member,
The above-mentioned leg frame 11 is configured to be foldable in the direction of arrow a in FIG. 3 by the pivoting means 10, 10, and the above-mentioned seat cushion frame 9 is hinged by the hinge members 8, 8 as shown by the arrow b in FIG. It is configured to be foldable on the frame 5.
[0013]
On the other hand, as shown in FIG. 3, the spare tire pan 14 as the rearmost floor of the vehicle includes a bottom 14A, vertical walls 14B, 14B rising upward from the bottom 14A, and a vehicle width direction from the vertical walls 14B, 14B. Seat storage units 14C, 14C horizontally connected outward, side walls 14D, 14D rising upward from the sheet storage units 14C, 14C, and horizontally from the side walls 14D, 14D outward in the vehicle width direction. 2, the bottom portion 14A of the spare tire pan 14 is inclined forward and backward as viewed from the side as shown in FIG. The pan 14 is configured to be deformed downward with the rear end portion of the rear suspension cross member 15 having high rigidity and not being deformed as a deformation fulcrum.
[0014]
Seat support brackets 16, 16 having an L-shaped cross section are fixed to the front portions of the seat storage portions 14C, 14C in the above-mentioned spare tire pan 14, and openings are provided in the standing portions of the respective seat support brackets 16, 16. The pivot pins 17, 17 are mounted between the seat pivot holes 16 a, 16 a thus formed and the pivot holes 6 a, 6 a opened in the left and right flat portions 6, 6 below the seat back frame 5. The entire third row seat 4 is shown on the above-mentioned seat storage portions 14C, 14C in the spare tire pan 14 with the left and right pivot pins 17, 17 located at the lower end of the seat back frame 5 as a center of rotation, as shown in FIG. It is configured to be stored as follows. A self-locking mechanism (not shown) is provided at the center of rotation of the hinge members 8, 8 so as to lock the seat cushion frame 9 folded on the seat back frame 5 in a folded state. .
[0015]
Vertical wall of the sheet storage unit 14C, the third column above the spare tire pan 14 so as to face in the longitudinal direction and the striker 12, 12 of the sheets 4 stored on a 14C in start scaning Bae Ataiyapan 14 as shown in FIG. 4 Hooks 19, 19 (vehicle-side engaging members ) are fixed to 14B, 14B via hook attachment portions 18, 18 each formed of a bracket or a bulging portion.
[0016]
Here, the strikers 12, 12 (seat-side engaging members) on the side of the seat back frame 5 and the hooks 19, 19 (vehicle-side engaging members) on the side of the spare tire pan 14 have a predetermined amount in the front-rear direction of the vehicle. It has a non-contact structure that is separated. As shown in FIG. 5, the detailed structure of the above striker 12 includes arc-shaped curvature portions 12A, 12A corresponding to the outer diameter of the upper end portion of the metal pipe seat back frame 5, and these curvature portions 12A, 12A. And a connecting portion 12B which is formed in a U-shape and forms an engaging space 12C for the hook 19 in the middle, and the above-mentioned curvature portions 12A, 12A are fixed to the upper rear end of the seat back frame 5 by welding means. It was done.
[0017]
On the other hand, the sheet at the rear side frames 20, 20 are provided between the rear side frames 20, 20 and the spare tire pan 14 of the right and left, details spare tire pan 14, which extends in the longitudinal direction of the vehicle body in the right and left side portions of the vehicle Break portions 21 and 21 are formed between the rear end portions of the storage portion 14C and the side wall 14D to concentrate the rear impact load and break the spare tire pan 14 described above. In the drawing, reference numeral 22 denotes a rear wheel, 23 denotes a spare tire detachably mounted on the spare tire pan 14 via a clamp device (not shown), 24 denotes a rear end panel, 25 denotes a rear bumper, and 26 denotes a rear tire house. It is.
[0018]
The illustrated embodiment is configured as described above, and the operation will be described below.
In order to store the third row of seats 4 in the use state (deployed state) shown in FIG. 2 on the spare tire pan 14 as shown in FIG. 4, the seat cushion frame 9 is supported by the hinge members 8, 8 as fulcrums. While folding on the frame 5, the leg frame 11 is folded on the seat cushion frame 9 with the pivoting means 10, 10 as a fulcrum, and then the seat pivot bracket located at the front of the seat storage sections 14C, 14C of the spare tire pan 14. When the entire third row seat 4 including the seat back frame 5 is rotated rearward with the pivot pins 16, 17 as fulcrums, the third row seat 4 becomes a seat as shown in FIG. The third row seats 4 are stored in the storage sections 14C, 14C so as not to protrude upward from the upper portion 14E of the spare tire pan 14, and the third row seats 4 are stored in this manner. When faces in a non-contact state in which the striker 12, 12 and hooks 19, 19 described above are separated from each other by a predetermined amount in the longitudinal direction.
[0019]
By the way, when a rear collision load is input to the spare tire pan 14 via the rear bumper 25 and the rear end panel 24 at the time of a rear collision of the vehicle, the left and right hooks 19, 19 are moved by the initial load of the rear collision as shown in FIG. The left and right strikers 12, 12 on the third row seat 4 side are engaged in the engagement spaces 12 </ b> C, 12 </ b> C, and these both 12, 19 are engaged.
[0020]
When the rear impact load is further input, the rear impact load concentrates on the above-described break portions 21 and 21, and the spare tire pan 14 is broken up and down with the break portions 21 and 21 as a boundary. The rear suspension cross member 15, which has high rigidity and is not deformed, is deformed downward as shown in FIG.
[0021]
At this time, the above-described third row seat 4 is pushed down by following the spare tire pan 14 which is deformed downward by engagement of the hook 19 and the striker 12.
[0022]
In short, in a vehicle configured such that the rearmost floor of the vehicle (see spare tire pan 14) is guided downward at the time of a rear collision, the third row seat 4 folded on the rearmost floor of the vehicle and A part of the floor is configured to engage at the time of a rear collision, and a seat-side engaging member (see striker 12) is provided at the rear end of the seat 4 when retracted, and a vehicle-side engaging member (see hook 19). ) Is mounted behind the seat-side engaging member (see the striker 12) with a predetermined distance therebetween, so that the above-mentioned engaging member (see the hook 19) is seated by the initial load of the rear-end collision when the vehicle rear-ends. The vehicle is securely engaged with the side engaging member (see the striker 12), and the floor at the rearmost portion of the vehicle is guided downward while maintaining this engaged state.
[0023]
As a result, the third-row seat 4 can be pushed down by following the rear-end collision behavior (downward deformation) of the rearmost floor of the vehicle, and the third-row seat 4 This has the effect of reliably preventing the vehicle from jumping to the second row seat 3 side in the room, and providing better protection for the rear passenger.
[0024]
In addition, the rear impact load is concentrated on the rear tire floor or the spare tire pan 14 between the rear side frame 20 extending in the front-rear direction of the vehicle body and the side surface of the above-described third row seat 4 when retracted. Since the break portion 21 for breaking the last floor or the spare tire pan 14 is formed, a rear impact load concentrates on the break portion 21 at the time of a rear collision of the vehicle, and the break portion 21 is actively broken. Can be. As a result, there is an effect that the floor at the rearmost portion of the vehicle or the spare tire pan 14 can be guided more reliably downward and the third row seat 4 can be prevented from jumping up.
[0025]
In correspondence between the configuration of the present invention and the above-described embodiment,
The seat of the present invention corresponds to the third row seat 4 of the embodiment,
Similarly,
The floor at the rear of the vehicle corresponds to the spare tire pan 14,
The engagement member corresponds to the striker 12,
The engagement member corresponds to the hook 19,
The seat back corresponds to the seat back frame 5 and the belt webbing 13,
The seat cushion corresponds to the seat cushion frame 9 and the belt webbing 13,
The pivot portion corresponds to the pivot pin 17,
The present invention is not limited only to the configuration of the above embodiment.
[Brief description of the drawings]
FIG. 1 is a schematic view of a box-type vehicle provided with a vehicle seat structure of the present invention.
FIG. 2 is a side view of the vehicle seat structure of the present invention when the seat is used. FIG. 3 is an exploded perspective view of FIG.
FIG. 4 is a side view when the seat is stored.
FIG. 5 is an enlarged perspective view of a striker.
FIG. 6 is a side view showing the deformation behavior of a vehicle at the beginning of a rear collision.
FIG. 7 is a side view showing a downward deformation behavior of the spare tire pan.
[Explanation of symbols]
4: 3rd row sheet (sheet)
5: seat back frame 9: seat cushion frame 12: striker (engaging member)
14 Spare tire pan (the floor at the rear of the vehicle)
17 ... Pivot pin (pivot)
19 ... Hook (engagement member)
20 ... rear side frame 21 ... broken part

Claims (2)

A vehicle seat structure having a structure for guiding the floor at the rearmost portion of the vehicle downward during a rear collision,
The seat is a seat back,
A pivoting portion that pivots rearward around the lower end of the seat back during storage and is foldably pivotally supported on the rearmost floor of the vehicle or on a spare tire pan;
A seat cushion connected to the seat back so as to be foldable,
An engaging member is provided at an upper rear end of the seat back,
At the time of storing the seat, an engaging member facing the engaging member in the vehicle front-rear direction is attached to the rearmost floor of the vehicle or on a spare tire pan at a predetermined distance behind the engaging member. ,
The engagement member and the engagement member are engaged at the time of a rear collision of the vehicle.
Vehicle seat structure. A rear impact load is concentrated on the rearmost floor or spare tire pan of the vehicle between the rear side frame extending in the front-rear direction of the vehicle body and the side of the seat when retracted, and the rearmost floor or spare tire pan is broken. The vehicle seat structure according to claim 1, wherein a break portion is formed.

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