JP2002067758A - Underfloor storage seat structure - Google Patents

Abstract

(57) [Summary] [Purpose] To enable application to small cars and improve the operability. [Structure] A slide mechanism 22 in which a runner 30 is slidably assembled to a lower rail 28 is spaced and juxtaposed at the left and right positions of the storage recess 20. The front and rear positions of the hinge can be moved back and forth within the storage recess. A foldable support link 40, which is a combination of an upper link 36 and a lower link 38, is erected and pivoted between the side of the seat back 14 and the front of the runner 30. The link is slidably connected along the side of the seat cushion 12 via the guide means 42, so that the rotation of the seat cushion can be interlocked with the rotation of the seat back. A predetermined forward position from the hinge position at the time of storage is defined in advance as a hinge position in the seated state of the seat body 16, and the locking means 54 is used to lock the runner 30 with respect to the lower rail 28 at this hinge position.
, The seat body in the seated form can be fixedly set at the corresponding front position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat cushion and a seat back which are folded into a predetermined storage form, and the seat body in this storage form can be stored in a storage recess on the floor under a specific rotation operation. Related to the underfloor storage sheet structure.

[0002]

2. Description of the Related Art For example, an RV in which a seat cushion and a seat back can be folded and stored in a predetermined position can be used as a luggage compartment and a passenger compartment or shared.
Rear seats for series cars, one-box cars, small multi-purpose cars, etc., mainly in the third row (third seats)
Etc. are widely provided. For example, a configuration disclosed in Japanese Utility Model Laid-Open Publication No. 07-028728, in which the entire seat can be stored in the storage recess on the floor surface under rotation, is known as this type of storage sheet.

In the configuration disclosed in Japanese Utility Model Laid-Open Publication No. 07-028728, a lower end of a seat frame to which a seat back and a seat cushion are pivotally attached is provided with a pin (hinge) protruding from a floor in a tire house. ), And is connected and supported so as to be able to fall backward from a standing posture in which the seat is in a seating form. A storage recess for storing a sheet is formed in the floor space on the rear side.

According to the underfloor storage sheet, the seat can be stored without leaving a protruding portion into the room, so that the indoor space can be effectively utilized.

[0005]

SUMMARY OF THE INVENTION Here, the above-mentioned actual Kaihei
In the configuration disclosed in Japanese Patent Application Publication No. 07-0228728, the entire seat in the storage form is stored in the storage recess on the floor surface under the seat frame centered on the hinge at the lower end disposed in front of the storage recess. Therefore, at least the front and rear length corresponding to the vertical length of the storage form is required for the floor space behind the hinge. Further, in this known configuration, the seat is lifted up from a space behind the hinge with the hinge at the front position of the storage recess as a rotation center, and a seating form of the seat is formed on the front surface thereof under the subsequent standing posture. If this hinge is too forward,
There is a possibility that the seating space between the seat and the front row seat cannot be sufficiently secured.

That is, this known configuration is effective for a large vehicle or the like in which a large floor space can be secured before and after the hinge, but it is difficult to apply it to a small vehicle or the like in which a large front and rear space cannot be secured. Poor adaptability is inevitable.

Further, in this known configuration, since a pin protruding from the tire house or the like is used as a hinge of the seat frame, even if the seat body is in the retracted position, the pin or the bracket on the seat frame side is used. Inevitably protrudes from the floor and is exposed. Therefore, the appearance quality at the time of storage is likely to be reduced.

In this known structure, a seat back and a seat cushion are pivotally attached to the upper and lower ends of a seat frame, respectively. Then, the seat back and the seat cushion are arranged in one plane by folding the seat cushion under the flip of the seat cushion in the front space of the seat frame formed by the inversion rotation of the seat back upward. Can be formed.

[0009] However, in this configuration, individual turning operations on the seat frame, the seat back, and the seat cushion are required both when the seat is stored and when the seat is set, and usually,
In addition to these operations, the locking and unlocking operations of the stopper are added, so that the number of operation steps at the time of storage and setting is large, inevitably inferior in operability, and the structure of each mechanism is complicated. It is easy to be accompanied.

[0010] In a vehicle provided with this type of underfloor storage seat, the storage recess is formed in two upper and lower stages, the upper stage is a storage space for the seat body, and the lower stage is a storage space for spare tires and the like. This has been done conventionally. However, most of the known underfloor storage seats have a shape and configuration that allow the seat to be flipped up, that is, open a storage space for spare tires or the like only in the storage configuration of the seat body. Is inevitable.

An object of the present invention is to provide an underfloor storage sheet structure which can be applied to a small vehicle and improves the operability thereof.

It is another object of the present invention to provide an underfloor storage sheet structure that allows a flip-up operation regardless of the shape of the seat body.

[0013]

In order to achieve this object, according to the present invention, a seat cushion can be flipped up and folded down on a seating surface of a seat back so as to be pivotable at a rear end thereof. Originally connected to the seat back. Further, a slide mechanism in which a movable runner is slidably assembled to the lower rail is spaced and juxtaposed at the left and right positions of the storage recess, and pivotally attached to the lower portion of the seat back to the rear portion of the runner via a hinge. The position can be moved back and forth within the storage recess, and a foldable support link as a combination of an upper link and a lower link is erected and pivotally mounted between the seat back side and the runner front. The upper link of the support link body can slide freely along the side of the seat cushion,
The rotation of the seat cushion can be interlocked with the rotation of the seat back by being connected to the seat cushion via predetermined guide means.

Then, the seat body is moved down in the storage recess on the floor under the fall of the seat back accompanied by the movement of the hinge to the rear of the storage recess by the slide mechanism and the folding of the seat cushion interlocked with the fall. In addition, while being able to be stored in this storage mode, a predetermined front position from the hinge position at the time of storage is defined in advance as a hinge position in the seated configuration of the seat body, and a predetermined locking means is used to set the position in this hinge position. Under the lock of the runner with respect to the lower rail, the seat body in the seated configuration can be fixedly set at the corresponding front position.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings.

As shown in FIGS. 1 and 2, in the underfloor storage seat structure 10 according to the present invention, a seat cushion 1 is provided.
2.The foldable seat body 16 as a combination of the seat back 14 is supported movably back and forth with respect to the storage recess 20 formed on the floor surface 18 through the slide mechanism 22 disposed in the storage recess. Have been. Then, the folded form in which the seat cushion 12 is flipped up facing the seating surface 14a of the seat back 14 is the storage form of the seat body 16,
The underfloor storage sheet structure 10 is configured such that the seat body can be stored in the storage recess 20 by the seat back in this storage mode, that is, the entire seat body is folded down.

As shown, in the embodiment of the present invention, the seat back 14 is formed to have a substantially concave storage portion 24 on its seating surface 14a. Then, for example, by the pivotal support of the rear end portion of the seat cushion 12 by the pivot pin 26 disposed in the storage portion 24, the seat cushion is pulled out of the storage portion shown in FIG. 3, is connected to and supported by the seat back 14 so as to be rotatable between a storage position stored in the storage portion, that is, a folding position.

As shown in FIGS. 1 and 2, the seat body 16 formed by the connection of the seat cushion 12 and the seat back 14 is rotatably connected to a slide mechanism 22 in a storage recess 20. , Are supported.

The slide mechanism 22 is a combination of a lower rail 28 and a movable runner 30. For example, assembling of the runner to the lower rail with the internal rollable rollers 32F and 32R spaced apart from each other. The slide mechanism is formed so that the runner can move back and forth with respect to the lower rail. In addition, this slide mechanism 22
They are juxtaposed and spaced apart from each other at left and right positions in the storage recess 20.

In the present invention, the seat body 16 is connected to and supported by the slide mechanism 22 by pivotally attaching the lower end of the seat back 14 to the rear portion of the runner 30 of the slide mechanism. For example, the lower end of the seat back 14 is pivotally supported by the runner 30 via a protruding support shaft 34, and by using this support shaft as a hinge, the seat back, that is, the seat body 16 is connected to the slide mechanism 22. It is rotatable with respect to this.

That is, in the present invention, the seat back 14, that is, the hinge (support shaft) 34 of the seat body 16 is supported by the slide mechanism 22 so as to be movable in the front-rear direction of the storage recess 20.

In the embodiment of the present invention,
A support shaft 34 serving as a hinge of the seat back 14 is
This support shaft (hinge) is also arranged as it also serves as the rotation shaft of R, and penetrates through the runner 30 and the rollers.

Here, as can be seen from FIGS. 1 and 2, in the present invention, the upper link 36 and the lower link 36 are provided.
Foldable support link as a combination of 38
40 is installed and pivoted between the side of the seat back 14 and the front of the runner 30.

The support link 40 is formed by pivotally connecting one end of an upper link 36 and a lower link 38 with a pivot pin 44, and the other end thereof is pivotally connected with pivot pins 46 and 47, respectively. By the side of the seat back 14 and the runner
The extension and folding are erected between the front and the front of 30.

The support link body 40 is provided so as to be able to define a standing posture of the seat back 14 in a seated state under the extension thereof, and in a folded direction (forward leaning direction) with respect to the runner 30 under the folded state. Of the seat back 14 can be guaranteed.

In the embodiment of the present invention,
A pivot pin 47 that pivotally connects the lower link 38 of the support link body to the front part of the runner 30 also serves as a rotation axis of the front roller 32F.

In the present invention, the upper link 36 of the supporting link body is slidably connected to the seat cushion via predetermined guide means 42 along the side of the seat cushion 12.

As the guide means 42, for example, a combination of a guide rail 50 fixed to the side of the seat cushion 12 and a roller 52 rotatably connected to the upper link 36 can be exemplified. Under a rollable interior, the seat cushion and the upper rail are connected in an interlockable manner.

According to such a configuration, the seat back 14
When the support link body 40 is extended along with the upright movement, the seat cushion 12 is defined and supported in its seating posture under the vertical engagement between the guide rails 50 and the rollers 52 of the guide means. Since the upper link 36 is slidably connected to the side of the seat cushion 12 via the guide means 42, when the seat back 14 is turned around the hinge 34 in the falling direction, As a result, the seat cushion is rotated in the corresponding direction, that is, in the folding direction (see FIG. 3).

In the underfloor storage seat structure 10 of the present invention, the hinge 34 at the lower end of the seatback 14 is provided with a slide mechanism.
Since the inside of the storage recess 20 can be moved in the front-back direction by the 22,
As can be seen from FIG. 3, the rear position with respect to the lower rail 28 is the position of the runner 30 in the storage configuration of the seat body 16, that is, the position of the hinge. Then, if the seat back 14 is raised from the storage state of the seat body 16 at the time of storage, the seat cushion 12 is moved under the rotation linked with the extension of the support link body 40 from the folded shape. The seating posture is automatically set (see FIG. 1).

Here, in the present invention, a predetermined front position from the hinge position at the time of storage is defined in advance as a hinge position in the seated state of the seat body 16, and the predetermined lock means 54 uses this hinge position. Under the lock of the runner 30 with respect to the lower rail 28, the seat body in the seated form can be fixedly set to the corresponding front position.

As shown in FIGS. 1 and 2, the locking means 54 includes a latch 56 which is pivotally connected at one end to a front portion of the runner 30, for example, a pivot pin 47, and is fixed to, for example, the lower rail 28.
The lock plate 58 provided integrally can be exemplified by a combination of a lock hole 60 formed to enable insertion and engagement of the latch.The lock hole is a hinge position in a seating mode of the seat body 16, That is, it is formed in accordance with the front and rear positions of the runner with respect to the lower rail.

In the embodiment of the present invention,
The slide front end position of the runner 30 with respect to the lower rail 28 is
The lock position is defined as the lock position of the seat body 16 in the seated state.

As described above, in the underfloor storage seat structure 10 of the present invention, the seatback 14 and, consequently, the hinge 34 of the seat body 16 are movable inside the storage recess 20 in the front-rear direction. That is, the front and rear positions of the hinge 34 of the seat body 16 are not fixed, and can be appropriately moved according to the storage mode and the seating mode of the seat body, so that the hinge position in the storage mode or the hinge position in the seating mode is used. Without this, the storage recess 20 can be formed on the floor surface 18.

As described above, according to the present invention, the storage recess 20 corresponding to the vertical length of the seat body 16 in the storage mode is formed.
It is sufficient to form the seat body in the storage form in the floor space behind the position of the hinge in the storage form, or in the range including the position of the hinge 34 in the storage form or the position of the hinge in the sitting form. A length corresponding to the vertical length is not required. The position of the hinge 34 in the seating form is defined and set forward from the position of the hinge 34 in the storage form of the seat body 16, and the front position according to the distance from the front row seat is set in the sitting form. Because the hinge position is enough,
Regardless of the position where the storage recess 20 is formed, the front space in the seated state of the seat body can be appropriately set.

In other words, despite the fact that it is a seat under the floor, it is possible to narrow the space behind the seat body 16 without reducing the front space in the seating mode of the seat body 16, so that it can be used for small vehicles. According to the present invention, the underfloor storage sheet structure 10 that can be easily applied can be easily provided.

In addition, since the rotation of the seat cushion 12, that is, the storage and draw-out, is obtained in conjunction with the rotation of the seat back 14, the operability is reliably improved.

Further, since the seat back 14 can be rotated while being moved in the front-rear direction, it is possible to easily secure the rotation at a position where it does not interfere with the front or rear members. Therefore, the safety of the seat back 14 and, consequently, the seat body 16 at the time of rotation can be sufficiently ensured.

Further, since it is sufficient that the lock means 54 is a combination of the latch 56 and the lock hole 60, the structure can be sufficiently simplified. Then, since it is sufficient that the latch 56 is inserted into and engaged with the lock hole 60 while moving the seat body 16 forward, the operability of the lock is sufficiently improved.

Here, as shown in FIGS. 1 and 2, it is preferable that a lock pin 61 which engages with the lower link 38 of the extended support link body from below is integrally provided with the latch 56. . According to such a configuration, since the rotation of the latch 56 in the direction of disengaging from the lock hole 60 is prevented by the engagement between the lock pin 61 and the lower link 38, the seat body 16 is seated. The reliability of the lock in the configuration and, consequently, the safety are further improved.

As shown in FIGS. 1 and 2, in the embodiment of the present invention, for example, a stopper pin 62 engaged with the lock plate 58 under an arc movement around the hinge 34 is provided. The projection is protruded from the lower end of the seat back 14, and can prevent rotation of the seat back up to the standing posture in the seated state under the engagement of the stopper pin with the lock plate. A notch 64 for ensuring the rotation of the seat back 14 to the standing posture in the seating mode with the insertion of the stopper pin 62 is provided in correspondence with the lock position of the runner 30 by the locking means 54, so that the seat The setting of the seat body 16 in the form can be limited only at the lock position of the runner by the lock means.

According to such a configuration, the standing posture of the seat back 14 cannot be set at a position other than the predetermined front position, that is, the locked position of the runner 30 with respect to the lower rail 28 by the locking means 54, so that the seat without the lock is set. The setting of the seating form of the main body 16 is reliably prevented. Therefore,
According to this, the safety of the seat body 16 in the seating mode can be easily ensured.

As can be seen from FIGS. 1 and 2,
In the embodiment of the present invention, a predetermined engaging claw 66 is provided at the rear portion of the runner 30, and the engaging claw can be inserted and engaged from below the runner 30 at the lock position of the runner by the locking means 54. A mating hole 68 is formed at a position corresponding to the lock plate 58.

In this configuration, the engaging claw 66 is normally arranged at a position separated from the engaging hole 68 below the engaging hole 68, so that the movement of the runner 30 with respect to the lower rail 28 is ensured by this. Then, in an emergency or the like, when the runner 30 is excessively pulled up with deformation of the lower rail 28, etc.,
Since the upward movement and the longitudinal movement of the runner with respect to the lower rail are prevented by the insertion and engagement of the engagement claws 66 into the engagement holes 68, according to this configuration, the safety in an emergency or the like can be improved. The securing can be easily performed without complicating the configuration.

Further, in the embodiment of the present invention,
A substantially concave storage portion 24 is provided on the seating surface side of the seat back 14, and the seat cushion 12 is foldable in the storage portion. However, the present invention is not limited to this.For example, the storage portion is provided on the seat back seating surface. Instead, the seat cushion may be simply superimposed facing the seating surface of the seat back with the flip up.

However, as in the embodiment of the present invention, the substantially concave storage portion 24 is provided on the seating surface side of the seat back 14.
If the seat cushion 12 can be folded and stored in this storage space, the thickness of the entire seat in the storage state of the seat can be suppressed to about the thickness of the seat back. And the size of the plane shape is the seat back 14
Since the shape of the seat is not different from that of the first embodiment, it is possible to easily reduce the size of the sheet storage form in addition to the thickness thereof without complicating the configuration.

In the above-described embodiment, a configuration in which the lower rail 28 of the slide mechanism is fixedly disposed in the storage recess 20 is exemplified. However, the present invention is not limited to this. For example, as shown in FIG. 4, the front end of the lower rail 28 is pivotally connected to the storage recess 20 via the pivot pin 70 so as to be freely rotatable. It is preferable that the slide mechanism 22 can be flipped forward with respect to the storage recess by integrally connecting the rear ends with the connecting rod 72 being erected and fixed (see the dashed line).

In this configuration, a predetermined locking means (not shown) made of, for example, a combination of a latch and a striker, interposed and arranged between the rear end of the slide mechanism 22 or the connecting rod 72 and the storage recess 20. Under the lock of ()), the slide mechanism is fixedly arranged in the storage recess. Then, when the lock on the slide mechanism 22 by the lock means is released, the slide mechanism can be flipped up about the pivot pin 72 (see the dashed lines in FIGS. 4 and 5).

As can be seen from the alternate long and short dash lines in FIGS. 4 and 5, according to this configuration, the slide mechanism 22 and the seat body can be integrated in any of the storage mode and the seat mode of the seat body 16. Characteristic jump is obtained. That is, when the lower part of the storage recess 20 is the spare tire storage part 74 or the like, the operability can be ensured sufficiently high.

The embodiments described above are intended to explain the present invention, and do not limit the present invention in any way. All the modifications and alterations within the technical scope of the present invention are also included in this embodiment. It goes without saying that it is included in the invention.

[0051]

As described above, according to the underfloor storage seat structure of the present invention, the hinge of the seat body can be moved in the front-rear direction within the storage recess, and the position of the hinge in the storage mode, or Since the storage recess can be formed on the floor surface without being based on the position of the hinge in the seating mode, the width of the rear space is reduced without reducing the front space in the seating mode of the seat body. Can be obtained sufficiently. Therefore, according to the present invention, the underfloor storage sheet structure that can be easily applied to a small car or the like can be easily provided.

Further, since the rotation of the seat cushion can be obtained in conjunction with the rotation of the seat back, the operability is reliably improved.

Since the seat back can be rotated while being moved in the front-rear direction, it is possible to easily secure the rotation at a position where it does not interfere with the front or rear members. Therefore, the safety when the seat body is rotated can be sufficiently ensured.

If the lock means is a combination of a latch and a lock hole, the structure can be sufficiently simplified. Then, since it is sufficient to insert and engage the latch into the lock hole while moving the seat body forward, the operability of the lock is sufficiently improved. Further, a lock pin that engages with the lower link of the extended support link body from below is integrally provided with the latch, so that the rotation of the latch in the direction of detaching from the lock hole can be adjusted with this lock pin. Since the seat body is prevented from being engaged with the lower link, the reliability of locking in the seated state of the seat body and, consequently, the safety are further improved.

Further, a stopper pin engaged with the lock plate under an arc movement centered on the hinge is protruded from the lower end of the seat back, and a standing posture in a seated state under the insertion of the stopper pin. If the notch that guarantees the rotation of the seat back up to the lock position of the runner by the lock means is provided, the setting of the seat body to the seating form is limited only by the lock position of the runner by the lock means. Can be possible. Therefore, the safety of the seat body in the seated state can be easily secured.

A predetermined engaging claw is provided at the rear portion of the runner, and an engaging hole for inserting and engaging the engaging claw from below the runner at the lock position of the runner by the locking means is provided.
If it is formed at the corresponding portion of the lock plate, the upward movement of the runner with respect to the lower rail and the longitudinal movement of the runner with respect to the lower rail in an emergency or the like under insertion and engagement of the engagement claw into the engagement hole are prevented. And the like can easily be secured without complicating the configuration.

Further, the slide mechanism is connected to and supported by the storage recess while the front end of the lower rail is pivotally mounted in the storage recess, and the rear ends of the left and right lower rails are connected and supported by the bridge. According to the configuration in which the connecting rod integrally connected by the above is locked by the predetermined locking means, the slide mechanism and the seat body can be integrally flipped up in both the storage mode and the seat mode of the seat body. Therefore, in the case where the lower portion of the storage recess is a storage portion for a spare tire or the like, the operability thereof can be ensured sufficiently high.

[Brief description of the drawings]

FIG. 1 is a schematic side view of an underfloor storage seat structure according to the present invention in a seating configuration (standing posture of a seat back).

FIG. 2 is a schematic exploded perspective view of the underfloor storage sheet structure.

FIG. 3 is a schematic side view of the underfloor storage seat structure in a storage configuration (a seat back in a downturned posture).

FIG. 4 is a diagram illustrating a flip-up operation of a slide mechanism in a storage configuration of a seat body in the underfloor storage seat structure of the present invention.

FIG. 5 is a diagram showing a flip-up operation of a slide mechanism in a seated state of a seat body in the underfloor storage seat structure of the present invention.

[Explanation of symbols]

 10 Underfloor storage seat structure 12 Seat cushion 14 Seatback 16 Seat body 20 Storage recess 22 Slide mechanism 28 Lower rail 30 Runner 36 Upper link 38 Lower link 40 Support link body 42 Guide means 54 Lock means 56 Latch 60 Lock hole 61 Lock pin 62 Stopper Pin 64 Notch 66 Engagement claw 68 Engagement hole 70 Hinge pin (Pivot point) 72 Connecting rod 74 Locking means

Claims (5)

[Claims] 1. An underfloor storage seat in which a seat body including a seat cushion and a seatback is folded into a predetermined storage form and can be stored in a storage recess on a floor, wherein the seat cushion bounces toward a seating surface of the seatback. The slide mechanism, which can be raised and folded, is connected to the seat back under the pivot at the rear end, and the movable runner is slidably assembled to the lower rail, is separated and juxtaposed at the left and right positions in the storage recess, By pivotally attaching the lower end of the seat back to the rear part of the runner via the hinge, the front and rear positions of the hinge can be moved back and forth in the storage recess, and the folding link is a combination of an upper link and a lower link. The body is installed and pivoted between the seat back side and the runner front, and the upper link of this support link is The seat cushion can be slid along the side of the seat cushion and connected to the seat cushion via predetermined guide means, so that the rotation of the seat cushion can be linked with the rotation of the seat back. The seat body is folded under the fall of the seat back accompanied by the movement of the hinge and the folding of the seat cushion linked to this fall.
In the storage recess of the floor surface, the storage position can be stored in this storage mode, and a predetermined front position from the hinge position at the time of storage is defined in advance as a hinge position in the seating mode of the seat body, and a predetermined locking means is used. A seat structure under the floor, wherein the seat body in a seated form can be fixedly set to the corresponding front position under the lock of the runner with respect to the lower rail at the hinge position. 2. A combination of a locking means with a latch pivotally attached at one end to the front of the runner; and a locking hole formed in a locking plate integral with the lower rail to allow insertion and engagement of the latch. 2. The underfloor storage seat structure according to claim 1, wherein a lock pin is formed integrally with the lower link of the extended support link body and can be engaged with the lower link of the extended support link body from below. 3. A stopper pin, which is engaged with a lock plate integral with the lower rail under an arc movement centering on a hinge, protrudes from a lower end of the seat back, and engages the stopper pin with the lock plate. The notch that prevents the rotation of the seat back to the standing posture in the sitting mode and that ensures the rotation of the seat back to the standing posture in the sitting mode under the insertion of the stopper pin is provided by a locking means. By providing the position corresponding to the lock position of the runner by
The underfloor storage seat structure according to claim 1 or 2, wherein the seat body can be set to the seating mode only in a locked position of the runner by the locking means. 4. A predetermined engaging claw is provided at a rear portion of the runner, and an engaging hole which allows the engaging claw to be inserted and engaged from below the runner at a lock position of the runner by a locking means is integrated with the lower rail. By forming the engaging pawl at a position separated from the engaging hole below the lock plate, the movement of the runner with respect to the lower rail can be ensured, and the upward movement of the runner with respect to the lower rail in an emergency can be controlled by this lock. The underfloor storage sheet structure according to any one of claims 1 to 3, wherein the engagement claw can be prevented from being inserted into and engaged with the hole. 5. A slide mechanism coupled to the storage recess under pivotal attachment of the front end of the lower rail in the storage recess.
While being supported, between the rear ends of the left and right lower rails,
The connecting rods are integrally connected with each other while being erected and fixed, and the slide mechanism can be fixedly disposed in the storage recess under a lock to the storage recess by predetermined locking means. The underfloor storage seat structure according to any one of claims 1 to 4, wherein by releasing the lock, the slide mechanism can be flipped up integrally with the seat body about a pivot point at the front end of the lower rail.