JP5308046B2 - Mounting structure for vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat mounting structure including a rear seat on which a lock member having a hook portion is pivotally supported at an upper end portion of a rear seat back that can be moved forward around a rotation fulcrum at a lower end.

In so-called two-box type automobiles and the like, the seat back of the rear seat (hereinafter abbreviated as rear seat back) is configured to be switchable to a standing posture or a forward-facing posture, and by switching the seat back to a forward-facing posture, There is one that can expand the cargo floor behind the rear seat.
The above-described rear seat back is configured to include a lock mechanism that is supported so as to be pivotable in the vehicle front-rear direction around a pivot fulcrum at the lower end thereof, and that can hold the standing posture by locking the forward pivot. .
As a prior art of such a lock mechanism, for example, as disclosed in FIGS. 1 and 2 of Patent Document 1, a hook portion of a lock member provided at an upper end portion of a rear seat back, a pin provided on a vehicle body side, It is known that the forward rotation of the rear seat back is locked by the engagement.
Japanese Utility Model Publication No. 54-20426

  However, in the lock mechanism disclosed in Patent Document 1, when the front part of the vehicle collides, the load on the occupant and the rear seat is applied to the seat belt that restrains the occupant seated on the rear seat. The position of the pin provided on the vehicle body side when the rear part of the vehicle body is deformed so that the rear part of the vehicle body comes close to the rear seat due to the pulling force acting on the rear part of the vehicle body via the seat belt May deviate in a direction away from the hook portion, and the pin and hook portion may be disengaged, leaving room for improvement in this respect.

  The present invention has been made in view of the above circumstances, and its object is to provide a locking member for a rear seat back when the vehicle is subjected to a collision and the rear portion of the vehicle body is deformed so as to be close to the rear seat, It is to make it difficult to disengage the striker.

In order to achieve the above object, in the present invention,
A lock member having a hook portion is pivotally supported on the upper end portion of the rear seat back so as to be rotatable.
A striker on which the hook portion of the lock member can be engaged is provided on the vehicle body side,
When the vehicle is subjected to a collision and the rear part of the vehicle body is deformed so as to be close to the rear seat, the pressing part provided on the vehicle body side comes into contact with the pressed part provided on the lock member, and the pressing part is wherein the lock member, a rotational direction, and the hook portion and the vehicle body side of the striker, characterized in that it is configured to press in a direction to be engaged.

[Action and effect]
In the present invention, when the vehicle is subjected to a collision and the rear part of the vehicle body is deformed so as to be close to the rear seat, the pressing part provided on the vehicle body side comes into contact with the pressed part of the locking member, The hook portion and the striker on the vehicle body side are configured to press in the engagement direction.
For this reason, even if the position of the striker provided on the vehicle body side shifts in the direction away from the hook portion by deforming so that the rear portion of the vehicle body is close to the rear seat, the lock member is pressed in the engagement direction with the striker. As a result, the hook portion of the lock member follows the striker on the vehicle body side. As a result, the hook portion and the striker are not easily disengaged, and the locked state of the rear seat back can be more reliably maintained.

Embodiments of the present invention will be described below with reference to the drawings.
Embodiment
An embodiment of a vehicle 1 according to the present invention will be described with reference to FIGS. 1 to 4.
In addition, arrow FR, arrow UP, and arrow W appropriately described in each figure respectively indicate the front direction (traveling direction), the upward direction, and the vehicle width direction (left-right direction) of the vehicle 1, and in the rear seat 3 of the vehicle 1 , Forward direction, upward direction and width direction respectively.

  FIG. 1 is a perspective view of a vehicle 1 according to the present invention, and a front seat 2 and a rear seat 3 that can be used as a driver seat or a passenger seat are installed in the interior of the vehicle 1. .

(Configuration of rear seat 3)
The rear seat 3 having the characteristic configuration of the present invention will be described.
As shown in FIG. 1, the rear seat 3 includes a seat cushion 4 serving as a seating portion and a rear seatback 5 serving as a backrest portion. The rear seatback 5 has a lower pivot 6 (rotation fulcrum). Is supported so as to be pivotable in the front-rear direction, and can be freely switched to a standing posture or a forward-facing posture.

In the standing posture of the rear seat back 5, the forward rotation of the rear seat back 5 is locked by the two lock mechanisms 7, 7 provided at both ends in the width direction of the upper end of the rear seat back 5, and the occupant is in the rear seat 3. Can be seated.
Although not shown, by releasing the lock state of the lock mechanism 7, it is possible to turn the rear seat back 5 forward and tilt it onto the seat cushion 4 so as to assume a forward-facing posture. The cargo floor (not shown) can be expanded.

(Configuration of lock mechanism 7)
Next, the configuration of the lock mechanism 7 provided in the rear seat 3 will be described. The following description is about the right end lock mechanism 7 of the rear seat back 5, and the same applies to the left end lock mechanism 7. Description is omitted because of the configuration.
FIG. 2 is a perspective view of the lock mechanism 7 applicable to the vehicle according to the present invention. FIG. 2 shows a state where the hook portion 8a of the lock member 8 is engaged with the locking portion 10a of the striker 10 (locked state).

As shown in FIG. 2, the lock mechanism 7 includes a lock member 8 provided on the rear seat back 5 of the rear seat 3 and a striker 10 provided on the rear pillar 15 of the vehicle body.
(1) Lock member 8
As shown in FIG. 2, the lock member 8 is provided in a notch 12 formed by notching the widthwise end of the rear seat back 5 and engages with the locking part 10 a of the striker 10. And a grip portion 8c that can be gripped by an operator (such as an occupant) (note that the hook portion 8a of the lock member 8 in this embodiment The pressing portion 8b and the grip portion 8c are integrally formed).
The lock member 8 is pivotally supported around a shaft center of the mounting bolt 13 by a mounting bolt 13 protruding in the width direction of the rear seat 3 with respect to the side wall 12a (see FIG. 4) of the notch portion 12. (That is, the lock member 8 is pivotally supported so as to be rotatable in the front-rear direction of the vehicle).

(2) Striker 10
FIG. 3 is an exploded perspective view showing the manner in which the striker 10 is attached to the rear pillar 15 of the vehicle body via the striker attachment bracket 14.
As shown in FIG. 3, the striker 10 is formed by bending a metal round bar having a U-shaped axis in the vicinity of the middle thereof, and can engage with the hook portion 8 a of the lock member 8. The stop portion 10a and the two attachment portions 10b and 10b are integrally formed.

  The striker mounting bracket 14 includes a contact portion 14 a that contacts the rear pillar 15, a convex portion 14 b (an example of a pressing portion), a standing piece 14 c that is used for positioning when the striker mounting bracket 14 is mounted on the rear pillar 15, and the striker 10. In this embodiment, the contact part 14a, the convex part 14b, the upright piece 14c, and the pressing part 14d are integrated. It is molded into. A bolt insertion hole 14e for inserting a bolt is provided near the middle of the contact portion 14a.

  As shown in FIG. 2, the rear pillar 15 provided on the vehicle right side in the vehicle of the present embodiment is disposed on the vehicle rear side of the right end portion in the width direction of the rear seat back 5 of the rear seat in the standing posture. Although not shown, the rear pillar on the left side of the vehicle is disposed on the vehicle rear side at the left end of the rear seat back 5 in the width direction.

  As shown in FIG. 3, a bolt insertion hole 15 a for inserting a bolt and a through hole 15 b into which the upright piece 14 c of the striker mounting bracket 14 can be inserted are provided in the vehicle interior side of the rear pillar 15. ing.

When attaching the striker 10 to the rear pillar 15, first, the striker 10 (with the locking portion 10a up) is placed between the rear pillar 15 and the striker mounting bracket 14 (with the convex portion 14b up). Deploy.
Then, the standing piece 14 c of the striker mounting bracket 14 is inserted into the through hole 15 b of the rear pillar 15, and the contact portion 14 a is brought into contact with the rear pillar 15. At this time, the mounting portions 10 b and 10 b of the striker 10 are configured to be sandwiched between the respective pressing portions 14 d and 14 d of the striker mounting bracket 14 and the rear pillar 15.
Next, the bolt 17 is passed through the bolt insertion hole 14e of the striker mounting bracket 14 and the bolt insertion hole 15a of the rear pillar 15 and is welded to the rear side of the rear pillar 15 (see FIG. The striker 10 is fixed to the rear pillar 15 by screwing the female screw 16 into a bolt hole 15a communicating with the bolt insertion hole 15a of the rear pillar 15 and fastening it (that is, mounting portions 10b, 10b of the striker 10). Are pressed onto the rear pillar 15 by the pressing portions 14d and 14d of the striker mounting bracket 14).

(Operation of the lock mechanism 7)
Next, the operation of the lock mechanism 7 having the above configuration will be described.
FIG. 4 is a side view showing an unlocked state (a), a locked state (b), and an action state (c) at the time of a rear collision of the vehicle.
As shown in FIG. 4A, in order to release the lock state of the lock mechanism 7, an operator (for example, an occupant or the like) grasps the grip portion 8c of the lock member 8, Rotate forward about the axis of the mounting bolt 13 (ie, rotate the lock member 8 in the clockwise direction as indicated by the solid line arrow in FIG. 4A).
Then, the engagement between the hook portion 8a of the lock member 8 and the engaging portion 10a of the striker 10 is released (that is, the locked state is released), and the lock member 8 is subsequently pulled to operate the rear seat. Rotate the back 5 forward (in the direction of the white arrow in FIG. 4A) around the pivot (not shown) at the lower end and tilt it onto the seat cushion (not shown) to move forward. It can be.

Next, the operation of the lock mechanism 7 when the vehicle receives a rear collision will be described. In addition, about the case where a vehicle receives a front part collision and deform | transforms so that the rear part of a vehicle body may adjoin a rear seat, since it may act similarly to the case where a rear part collision is received, description is abbreviate | omitted.
As shown in FIG. 4B, the hook portion 8a of the lock member 8 is engaged with the locking portion 10a of the striker 10 in the locked state before the vehicle receives a rear collision. The forward rotation of the rear seat back 5 is locked and the standing posture is maintained.
A sufficient gap S is provided between the convex portion 14b of the striker mounting bracket 14 and the pressed portion 8b of the lock member 8. In this state, as shown in FIG. Thus, the locked state can be released by rotating the lock member 8 forward.

As shown in FIG. 4 (c), when the vehicle undergoes a rear collision and the rear part of the vehicle body is deformed so as to be close to the rear seat, the rear pillar 15 of the vehicle body receives the impact force and inclines toward the front side of the vehicle. (The white arrow in FIG. 4C indicates the impact force applied to the rear pillar 15 of the vehicle body at the time of the rear collision of the vehicle).
Then, the position of the locking portion 10a of the striker 10 provided on the vehicle body side is a direction away from the hook portion 8a (that is, the direction indicated by the broken arrow in FIG. Therefore, there is a possibility that the lock member 8 and the striker 10 are disengaged and the locked state is released.

However, in the lock mechanism 7 of the present embodiment, the convex part 14b (pressing part) of the striker mounting bracket 14 comes into contact with the pressed part 8b of the lock member 8 by the deformation of the rear pillar 15 of the vehicle body, The locking member 8 is in the direction of engagement between the hook portion 8a and the engaging portion 10a of the striker 10 on the vehicle body side (that is, the direction indicated by the solid arrow in FIG. 4C). Is pushed in the direction of rotating the vehicle rearward (the counterclockwise direction in FIG. 4C).
Therefore, when the rear part of the vehicle receives a collision and is deformed so that the rear part of the vehicle body comes close to the rear seat, the position of the locking part 10a of the striker 10 provided on the vehicle body side is shifted in a direction away from the hook part 8a. Even so, the lock member 8 is forcibly rotated rearward by being pressed in the engagement direction with the striker 10 by the convex portion 14b of the striker mounting bracket 14. As a result, since the hook portion 8a of the lock member 8 follows the locking portion 10a of the striker 10, it is difficult to disengage the hook portion 8a from the locking portion 10a of the striker 10, and the rear seat back is locked. Is maintained.

[Another embodiment]
[1] As shown in FIG. 5, the length (A) in the front-rear direction of the pressed portion 8b of the lock member 8 in the above-described embodiment is the pressed portion 8b of the lock member 8 in the above-described embodiment. A length larger than the length (a) in the front-rear direction (see FIG. 4A) may be used (A> a).
In this case, it is not necessary to provide the convex portion 14b on the striker mounting bracket 14, and by using the upper portion of the contact portion 14a as a pressing portion, an effect of preventing unlocking equivalent to the above-described embodiment can be exhibited. FIG. 5A shows the lock state of the lock mechanism before the vehicle receives a collision, and FIG. 5B shows the operation state of the lock mechanism at the time of the vehicle collision.
[2] The lock mechanism 7 in the above-described embodiment may be applied to the last row seat of a vehicle having a three row seat or a four row seat.
[3] Regarding the rear seat 3 in the above-described embodiment, the entire rear seat 3 is supported so as to be pivotable in the front-rear direction around the pivot provided on the lower front side of the seat cushion 4. good.
[4] The shape of the striker 10 in the above embodiment is not limited to the shape in the above embodiment.

The perspective view of the vehicle which concerns on this invention The perspective view of the lock mechanism applicable to the vehicle which concerns on this invention An exploded perspective view showing how the striker is attached to the rear pillar of the vehicle body Side view showing the unlocked state (a), the locked state (b), and the operating state (c) at the time of a rear collision of the vehicle The side view of the locking mechanism in another embodiment of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Front seat 3 Rear seat 4 Seat cushion 5 Rear seat back 6 Pivot 7 Lock mechanism 8 Lock member 8a Hook part 8b Pressed part 8c Grip part 10 Striker 10a Locking part 10b Attachment part 12 Notch part 12a Side wall 13 Attachment bolt 14 Striker mounting bracket 14a Contact portion 14b Convex portion (pressing portion)
14c Standing piece 14d Holding part 14e Bolt insertion hole 15 Rear pillar 15a Bolt insertion hole 15b Through hole 16 Female screw 17 Bolt

Claims (1)

A lock member having a hook portion is pivotally supported on the upper end portion of the rear seat back so as to be rotatable.
A striker on which the hook portion of the lock member can be engaged is provided on the vehicle body side,
When the vehicle is subjected to a collision and the rear part of the vehicle body is deformed so as to be close to the rear seat, the pressing part provided on the vehicle body side comes into contact with the pressed part provided on the lock member, and the pressing part is wherein the lock member, a rotational direction, the mounting structure of a vehicle seat with the hook portion and the vehicle body side of the striker is configured to press in a direction to be engaged.

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