JPH0121013B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a support device for a rear seat installed in a motor vehicle such as a light van.

(Prior art) In general, a light van or other vehicle has a seat portion inside the vehicle body that can freely stand up forward with its lower front end pivoted on the vehicle body, and a seat portion that can freely tilt forward with its lower end pivoted on the vehicle body. Equipped with a rear seat consisting of a seat back, in addition to the normal use position where it is used as a seat, the seat can be used by tilting the seat back forward when loading relatively lightweight long luggage, etc. A first folding position where the seat is stacked on the seat, and a second folding position where the seat back is tilted forward after the seat seat is raised forward when, for example, relatively heavy long luggage is loaded. It is known that the cargo platform can be expanded to the position of the rear seat in accordance with the cargo to be loaded.

Conventionally, in such three-position type rear seats, in order to ensure the safety of the occupants, the rear part of the seat is connected to the vehicle body or the back of the seat with a locking device in the normal use position.
The seat is designed to prevent the seat from flying forward even in the event of a collision.

(Problems to be Solved by the Invention) However, in the conventional structure described above, the locking device for the seat seat is attached to the rear part of the seat seat which is difficult to reach, so the locking and unlocking operations are troublesome and However, it had the drawbacks of poor assembly workability and high cost.

The present invention has been made in view of this point, and by pressing and locking the seat portion as described above with the lower end surface of the seat back, the cargo platform can be expanded to the first and second folding positions. Of course, while ensuring the ease of raising the seat, it also reliably prevents the seat from popping out in the normal use position without requiring a conventional locking device at the rear of the seat. The purpose is to

(Means for Solving the Problems) In order to achieve the above object, the solution of the present invention includes a seat portion whose lower front end is pivotally supported by the vehicle body and can freely stand up forward, and a seat portion whose lower end is pivotally supported by the vehicle body. The object is the rear seat of a car, which consists of a seat back that can be tilted forward. The seat back portion stands upright with its lower end surface in contact with the upper surface of the rear end portion of the seat seat portion. On the other hand, a first rotating shaft is attached to the front end of the seat, and the first rotating shaft is attached to the vehicle body so as to be located forward of the first rotating shaft when the seat is in a position where it is used as a seat. a second rotating shaft; one end is pivotally connected to the first rotating shaft; the other end is pivotally connected to the second rotating shaft; the seat portion is rotatable about the first rotating shaft and the second rotating shaft; A first arm is provided. Further, a third rotating shaft is attached to the lower end of the seat back, and a fourth rotating shaft is attached to the vehicle body so as to be located below the third rotating shaft when the seat back is in a position where it is used as a seat. a shaft, one end of which is pivotally connected to the third rotating shaft, and the other end of which is pivotally connected to the fourth rotating shaft;
and a second arm that allows the seat back to rotate about a third rotation axis and a fourth rotation axis. Also,
It is fixed to the front end of the seat portion and extends from the front end of the seat portion toward the front of the vehicle body, and its front end is engageable with the front end of the first arm to prevent rotation of the first arm. a lock member provided on the vehicle body and operated to disengage from the first arm when the front end portion is moved upward by an external force; a lock that is provided so as to be able to engage with the second arm to prevent rotation of the second arm, and that is biased to rotate so as to release the engagement state with the second arm at least when the seat portion moves forward; The structure includes a bracket.

(Function) With the above configuration, in the present invention, when the rear seat is in the normal use position, the rear end upper surface of the seat seat is pressed against the raised seat back lower end surface, and the seat At the front end of the seat, the front end of the locking member engages with the front end of the first arm to lock and restrict the forward rotation of the first arm. The seat is securely locked in its normal use position, and even in the event of a collision, the seat will not fly forward from its mounting position. At this time, since the lock bracket is engaged with the second arm, rotation of the second arm is prevented, so that pressing of the seat portion by the seat back portion is ensured.

Then, when tilting the seat back forward from this normal use position to expand the cargo bed to the first folding position, by rotating only the seat back forward while leaving the seat seat as it is, The seat back is tilted forward about the third axis of rotation and is operated so as to be stacked on the seat seat. At this time, the seat back rotates around the third rotating shaft provided at the lower end of the seat back, so even when the lower end surface of the seat back is in contact with the upper surface of the rear end of the seat, the seat back rotates with the seat back. It can be rotated smoothly without much interference, and the loading platform expansion operation described above can be performed easily.

In addition, when the seat back is tilted forward to the second folding position after the seat is raised forward in order to extend the cargo bed from the normal use position, first, a With the front end of the locking member lifted upward and the first arm unlocked, the front end of the seat seat is pulled upward while being pulled forward, and the seat seat is rotated around the second rotation axis. The first arm is used as a rotating arm to rotate forward, and the seat is erected with the front part of the seat facing downward. At this time, as the seat portion moves forward, the lock bracket rotates under force, and the second arm is automatically unlocked by the lock bracket, causing the second arm to rotate around the fourth rotation axis. The state is that movement is possible. Thereafter, by pivoting and tilting the seat back portion forward about the fourth rotation axis using the second arm as a pivot arm, the cargo platform can be greatly expanded to the attachment position of the rear seat. At this time, the first arm has a first rotating shaft provided at the front end of the seat and a second rotating shaft provided on the vehicle body so as to be located forward of the first rotating shaft when the seat is in the normal use position. It can be rotated around the center, and the seat can be pulled out and moved forward while raising only the front part of the seat, so the seat can be moved forward even when the lower end of the seat back is in contact with the upper surface of the rear end. It can be pulled out smoothly and the seat can be easily raised. Additionally, this makes it possible to bring the lower end of the seat back into sufficient contact with the upper surface of the rear end of the seat seat, making it possible to further ensure that the seat seat is fixed in the normal use position. . Further, the second arm is rotatable around a third rotation shaft provided at the lower end of the seat back and a fourth rotation shaft provided on the vehicle body below the third rotation shaft, so that the seat back can be rotated around the vehicle body, etc. This allows for smooth forward tilting without interfering with the seat, and also allows the seat back to be flush with the cargo surface. Also,
Since the unlocking operation is performed at the front end of the seat without requiring the unlocking operation of the locking device at the rear end of the seat as in the conventional case, the loading platform expansion operation can be performed simply and easily.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

1 and 2, reference numeral 1 denotes a floor forming the bottom of the vehicle body, and the floor 1 has a two-step step behind a front seat portion 1a that supports front seats (not shown). A rear seat portion 1b and a cargo platform portion 1c are also formed. A rear seat 4 consisting of an independent seat seat 2 and a seat back 3 is arranged on the rear seat 1b. The lower part of the front end of the seat portion 2 is pivotally supported by the floor 1 so that the seat portion 2 can stand upright forward. Further, the lower end of the seat back portion 3 is rotatably supported by the floor 1 so as to be freely tiltable forward, and in the normal use position, the lower end surface of the seat back portion 3 is supported by the floor 1.
It stands upright in contact with the upper surface of the rear end, and the upper part is fixed to the vehicle body by a locking device (not shown).

That is, to explain in detail the structure of the shaft support of the seat seat 2, as shown in FIG.
A fixing plate 5 having a U-shaped cross section is fixedly attached to a frame line 6 as a reinforcing member embedded in the seat seat 2 on the lower side surface of the front end, and a flange portion 5a at the rear end of the fixing plate 5, A first rotating shaft 7 is installed between the two rotating shafts 5a. On the other hand, the front end of the rear seat portion 1b of the floor 1 has a front end portion of the rear seat portion 1b.
A mounting base 8 is fixed to the mounting base 8 and protrudes forward from the mounting base 8. At the front end of the mounting base 8, shaft mounting portions 9, 9 are formed by bending both sides of the front end portion downward.
A second rotating shaft 10 is installed between the seats and is positioned further forward of the vehicle body than the first rotating shaft 7 when the seat portion 2 is in a normal use position where the seat portion 2 is used as a seat. Furthermore, 11 is a first section having a U-shaped cross section.
The rear end portion of the first arm 11 is an arm, and the rear end portion of the first arm 11 is
The fixing plate 5 is pivotally connected to the first rotating shaft 7 with the inner surface of the rear end of the fixing plate 5 engaged with the outer surface of the rear end, and the front end is connected to the inner surface of the front end of the mounting base 8. The shaft frame part 9 is pivotally connected to the second rotating shaft 10 in a state where the outer surface thereof is fitted, and the seat seat part 2 is rotatable about the first rotating shaft 7 and the second rotating shaft 10. , the seat portion 2 supported by the first rotating shaft 7 is rotatable forward about the second rotating shaft 10 using the first arm 11 as a rotating arm. Furthermore, the rear end of 12 is fixed to the fixing plate 5 at the front end of the seat seat 2 by a pin 13, and the front end is fixed to the fixing plate 5 at the front end of the seat seat 2.
This is a locking member made of a leaf spring material extending from the front end toward the front of the vehicle body. When the rear seat 4 is in the normal use position, the front end of the locking member 12 engages with the front end of the first arm 11 and locks the seat seat. The lock member 12 is operated so as to be disengaged from the first arm 11 when the front end of the lock member 12 is moved upward by an external force.

Further, in detail regarding the shaft support of the seat back 3, as shown in FIGS. 4 to 6, a third rotating shaft 14 is attached to the lower end of the seat back 3, while the floor 1 A bracket 15 extending to the side of the lower end of the seat back 3 is attached to the upper part of the stepped portion 1d between the rear seat portion 1b and the cargo platform portion 1c by mounting bolts 16, 16. A fourth rotating shaft 17 is pivotally connected to the center of the bracket 15 and is located below the third rotating shaft 14 when the seat back 3 is in the normal use position where it is used as a seat. A notch 18 is provided at the lower end of the front end of the bracket 15, which corresponds to a notch 19 of a second arm 20, which will be described later, when the rear seat 4 is in the normal use position. Further, a substantially dogleg-shaped second arm 20 having a notch 19 at one end is disposed between the lower end of the seat back 3 and the bracket 15.
The other end of the arm 20 is pivotally connected to the third rotation shaft 14, and the center portion is connected to the fourth rotation shaft 1.
7, so that the seat back 3 can be rotated forward about the third rotation shaft 14 and the fourth rotation shaft 17.

Further, at the lower end of the proximal end of the bracket 15, a lock bracket 21 having a substantially triangular flat plate shape is provided with a pin 22.
It is rotatably attached via the The above-mentioned bracket 15 is attached to the tip of the lock bracket 21.
A lock pin 23 that removably engages both the notch 18 of the second arm 20 and the notch 19 of the second arm 20.
A spring is provided on the outer periphery of the pin 22 to urge the lock bracket 21 to rotate counterclockwise in the figure so that it always comes into contact with the rear end of the seat portion 2 in the normal use position. 24 is installed. On the other hand, at the rear end of the seat portion 2, there is provided a contact portion 6a which exposes the frame line 6 within the seat portion 2 to the outside and comes into contact with the lock bracket 21 in the normal use position. ing. As described above, when the rear seat 4 is in the normal use position, the contact portion 6 of the frame line 6
a comes into contact with the lock bracket 21 and rotates the lock bracket 21 clockwise against the biasing force of the spring 24, thereby moving the lock pin 23 into the second arm 20 and both notches 18 and 19 of the bracket 15.
When the seat portion 2 is moved forward, the contact portion 6a and the lock bracket 21 are prevented from coming into contact with each other when the seat portion 2 is moved forward. The lock bracket 21 rotates counterclockwise by the biasing force of the spring 24 to release the engagement between the second arm 20 and the bracket 15 via the lock pin 23, and the second arm 20 rotates in the fourth rotation. A locking device 25 is configured to control engagement and disengagement between the two so that it can rotate about a shaft 17. In addition, 26
is a guide provided on the bracket 15 and consisting of a circular arc portion 26a centered on the axis of the third rotating shaft 14 in the normal use position of the rear seat 4 and a circular arc portion 26b centered on the axis of the fourth rotating shaft 17. A guide pin 28 fixed to the frame 27 of the seat back 3 is slidably inserted into the guide hole 26, and rotates the seat back 3 about the third rotation axis 14 and the fourth rotation. It is provided so that rotation about the shaft 17 can be performed smoothly.

Therefore, in the above embodiment, when the rear seat 4 is in the normal use position, the rear end upper surface of the seat seat 2 is pressed against the upright lower end surface of the seat back 3, and Since the locking member 12 engages with the first arm 11 at the front end of the seat portion 2 to restrict the forward rotation of the seat portion 2, the action of both the front and rear ends causes the seat portion 2 to lock. is securely locked in the normal use position, and even if a collision occurs, the seat portion 2 will not fly forward from the mounting position, and the safety of the occupants can be sufficiently ensured. At this time, the frame line contact portion 6a at the rear end of the seat seat portion 2 contacts the lock bracket 21, and the lock pin 23 at the tip of the lock bracket 21 contacts the notch 18 of the bracket 15 and the second arm 20. Since it engages with the notch 19 of
Since the second arm 20 is prevented from rotating around the fourth rotation axis 17, the pressing force is ensured by the seat back 3 of the seat seat 2.

When the seat back 3 is tilted forward from this normal use position to the first folding position in order to expand the cargo bed, a locking device ( (not shown) and then rotate the seat back 3 forward, so that the seat back 3 is tilted forward about the third rotation axis 14 and the first
The loading platform can be expanded as shown by the two-dot chain line in FIG. At this time, the seat back 3 rotates around the third rotating shaft 14 provided at the lower end of the seat back 3, so even if the lower end surface of the seat back 3 is in contact with the upper surface of the rear end of the seat seat 2, It can be rotated smoothly without much interference with the seat portion 2, and the cargo platform expansion operation described above can be performed easily.

In addition, when the seat seat 2 is raised forward to extend the cargo bed from the normal use position, and the seat back 3 is tilted forward to take the second folding position, as shown in FIG. First, the locking member 12 provided at the front end of the seat seat 2 is pulled upward to unlock the first arm 11, and then the front end of the seat seat 2 is lifted upward and pulled out forward. The seat part 2 is rotated forward about the second rotating shaft 10 to stand up with the front part of the seat part 2 facing downward. At that time, as the seat portion 2 moves forward, the seat portion 2
Frame line contact portion 6a at rear end and lock bracket 21
The lock bracket 21 is rotated counterclockwise by the biasing force of the spring 24 as shown in FIG. 18 and the notch 19 of the second arm 20, the lock is automatically released, and the second arm 2
Rotation around the fourth rotation axis 17 of 0 is now possible. After that, the locking device (not shown) on the upper part of the seat back 3 is unlocked, and the seat back 3 is moved to the fourth position.
By rotating forward about the rotation axis 17 and tilting it, the cargo platform can be greatly expanded to the mounting position of the rear seat 4, as shown in FIG. 1b.
For example, it becomes possible to load relatively heavy long cargo. At that time, the first arm 11 is connected to the first rotating shaft 7 provided at the front end of the seat portion 2 and the first rotating shaft 7 provided at the front end of the seat portion 2.
It is rotatable around the second rotating shaft 10 provided in the vehicle body further forward, and the seat portion 2 can be pulled out and moved forward while only the front portion thereof is raised upward.
The seat portion 2 can be smoothly pulled out forward even from a state where the lower end portion of the seat back portion 3 is in contact with the upper surface of the rear end, and the raising operation of the seat portion 2 can be easily performed. Furthermore, this makes it possible to bring the lower end of the seat back 3 into sufficient contact with the upper surface of the rear end of the seat seat 2, thereby further ensuring the fixation of the seat seat 2 in the normal use position. be able to. Further, the second arm 20 is rotatable around a third rotating shaft 14 provided at the lower end of the seat back 3 and a fourth rotating shaft 17 provided on the vehicle body below the third rotating shaft 14. The seat back part 3 can be smoothly tilted forward without interfering with the vehicle body, etc., and the seat back part 3 can be made flush with the loading platform surface, making it possible to further expand the loading platform. In addition, the unlocking operation is performed at the front end of the seat seat 2 instead of the conventional unlocking operation of the locking device at the rear end of the seat seat, making it possible to easily and easily expand the cargo platform. can.

(Effects of the Invention) As explained above, according to the present invention, in a support device for a rear seat of an automobile that can be changed to three positions: a normal use position and a first and second folding position, The seat back is pivoted to the vehicle body at its front end via a first arm that has two rotation axes, front and rear, and the seat back is pivoted to the vehicle body at its lower end via a second arm that has two rotation axes, upper and lower. Since it is supported, the loading platform expansion operation to each of the above-mentioned folding positions can be performed smoothly without interfering with others. Furthermore, in the normal use position, the rear end of the seat seat is pressed against the lower end of the seat back, whose rotation by the second arm is regulated by the lock bracket, and the seat back is held down. The first arm having the two front and rear rotation shafts allows the seat portion to be smoothly pulled out forward by sufficient contact with the lower end.
The front end of the arm is engaged and locked by the front end of the locking member, and the rotation of the front end of the seat seat is stably regulated, so that the seat seat can be fixed as in the conventional case. This can be done reliably with a simple structure without using a locking device at the rear end, and it is possible to reliably prevent the seat portion from flying out in the event of a collision. Further, the locking member is provided at an easily accessible position at the front end of the seat, and the lock bracket automatically disengages from the second arm by moving the seat forward. Therefore, locking and unlocking operations can be easily performed. Therefore, it is possible to ensure the locking of the seat portion, simplify the structure, and facilitate the operation of expanding the loading platform, especially the ease of raising the seat portion, thereby improving safety and operability. , cost-effective 3
A position type rear seat support device can be provided.

[Brief explanation of drawings]

The drawings illustrate embodiments of the invention.
Figures a and b are schematic explanatory diagrams showing the expanded state of the cargo platform in the first and second folding positions of the rear seats, respectively, Figure 2 is a side view of the same, and Figure 3 is an enlarged view of the pivot support of the seat seat. 4 and 5 are enlarged side views of the pivot portion of the seat back, and FIG. 6 is a view taken from the direction of arrow A in FIG. 4. 1... Floor, 2... Seat seat, 3... Seat back, 4... Rear seat, 7... First rotating shaft, 1
0...Second rotating shaft, 11...First arm, 12...
...Lock member, 14...Third rotating shaft, 17... Fourth rotating shaft, 20... Second arm, 21... Lock bracket.

Claims (1)

[Scope of Claims] 1. In a rear seat of an automobile, comprising a seat portion whose lower end is pivotally supported by the vehicle body and can freely stand up forward, and a seat back portion whose lower end is pivotally supported by the vehicle body and can be tilted forward. , the seat back stands upright with its lower end surface in contact with the upper surface of the rear end of the seat seat, and a first rotating shaft attached to the front end of the seat seat; a second rotating shaft attached to the vehicle body so as to be located forward of the first rotating shaft when the seat is in a position used as a seat, one end of which is pivotally connected to the first rotating shaft, and the other end of the a first arm that is pivotally connected to a second rotating shaft and allows the seat portion to rotate about the first rotating shaft and the second rotating shaft; a third rotating shaft that is attached to the lower end of the seat back; , a fourth rotation shaft attached to the vehicle body so as to be located below the third rotation shaft when the seat back is in a position where it is used as a seat, one end of which is pivotally connected to the third rotation shaft, and the other end a second arm that is pivotally connected to the fourth rotating shaft and that enables the seat back to rotate about the third and fourth rotating shafts; Extending from the front end of the seat portion to the front of the vehicle body, the front end thereof is provided so as to be engageable with the front end of the first arm to prevent rotation of the first arm, and the front end is moved upward by an external force. a locking member that is operated to disengage from the first arm when the locking member is engaged with the first arm; A rear seat of an automobile, comprising: a lock bracket that is rotatably biased to be disengaged from the second arm at least when the seat portion is moved forward; support device.