JPH0930303A - Vehicular seat structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To change deck layout with a low rotation locus without interference by fowardly declining a backrest pivotally mounted at its lower part on a car body and backwardly declining the backrest of the bucket seat after rotating and loading the seat cushion of a rear seat on a floor to form a continuous face with the seat cushion, the backrest, and a floor on a deck. SOLUTION: A backrest 33 on a rear seat 2 is pivotally forward-declinably mounted by means of a turning shaft 37. A seat cushion 10 is turnably formed by means of first and second hinge shafts 15, 16. The seat cushion 10 is vertically raised by means of the first hinge shaft 15, and is moved to the foot floor face 32 side at the bucket seat 1 side, and is then declined by means of the second hinge shaft 16. In this case, the second hinge shaft 16 is smaller than the first hinge shaft 15 in the turning operation radius, avoiding interference to the bucket seat at its rear. Now, the backrest 33 is forwardly declined. The backrest 34 of the bucket seat is backwardly declined on the backrest 33. The backrest 33 of the rear seat 2 is formwardly declined to form a load- carrying platform floor for long cargo.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a vehicle interior space of a vehicle seat, a method for accommodating a foot floor, and a vehicle seat structure, and more particularly to a seat flat structure or an assistant by appropriately tilting the seat forward or backward. The present invention relates to a vehicle seat structure that facilitates changing a luggage compartment layout for loading long seats and rear seats.

[0002]

2. Description of the Related Art Conventionally, when a large amount or long length of luggage is loaded in the seat of this type of vehicle, especially in the rear seat, the luggage carrier is expanded by folding the seat back on the upper surface of the seat cushion. are doing. Furthermore, after the seat cushion is pivoted forward about a hinge shaft provided at the lower part of the front end of the seat cushion, the seat cushion is raised and the seat back is tilted forward to move the rear seat space to the rear cargo bed floor surface. Technology to further expand the cargo bed so that they are substantially flush with each other (for example, Japanese Utility Model Publication No. 46-4489).
No.) is proposed.

Further, the seat cushion portion is maintained in a substantially horizontal state and the seat back portion is kept in a normal use position, and the upper surface of the seat cushion portion is folded forward by turning the back seat portion forward. A first folding position for maintaining the seat back portion in a closed state and a second folding position for maintaining the seat back portion in a vacant space on the seat floor caused by the standing upright position.
For the purpose of adopting a layout configuration that can be used separately for the folding position of the seat cushion part, a link for pivotally supporting the lower part of the front part of the seat cushion part at one end of the link arm is provided in the seat cushion part. Japanese Patent Publication No. 2-5613 proposes a double hinge structure in which the other end of the arm extends substantially horizontally and is pivotally supported on the seat floor.

[0004]

However, the above-mentioned conventional double hinge structure is proposed for flipping up and raising the seat cushion forward. As described above, the seat cushion is rotatable at two positions. Since it is configured to be pivotally supported, it has a structure that poses a danger even in the case of the standing rotation.
Moreover, with the above structure, when the seat cushion is turned over, the danger is further increased. Therefore, it is necessary to perform the work carefully while supporting the seat cushion from both sides. It is also a cause of damage to the pivotal area.

Further, in the conventional method for forming the luggage space by raising and raising the seat cushion, a flat and vast cargo handling floor that enables long cargo loading from the rear cargo bed to the instrument panel in the front of the vehicle is possible. Forming the surface was difficult.

The present invention has been made in view of the above technical problems, and various proposals of a vehicle seat structure which enables a layout change of front and rear seats capable of lying sideways for loading long objects and resting. The purpose is to do. Another object of the present invention is to prevent the seat cushion from interfering with the front seat when the seat cushion is turned over, the structure does not interfere with the occupant, and the turning operation is simple and safe with a small rotation path. The purpose of the present invention is to provide various proposals for a vehicle seat structure that can be inverted and stored.

[0007]

In order to achieve the above technical object, the present invention provides an effective hinge structure for a reversing hinge portion of a seat cushion in a vehicle having a rear cargo floor, for example. The hinge structure is arranged at a position not hindering the occupant, and while effectively avoiding the interference by the front seat, the seat cushion of the rear seat can be easily inverted and stored in the floor of the rear seat. .
As a result, not only is it possible to tilt the seat back forward to a space on the seat floor where the seat cushion has been inverted, to make the seat substantially flat, and to obtain a vast flat space, but also to create various flat spaces as described later. This makes it possible to form a variety of seat storage spaces.

That is, according to the first aspect of the present invention, not only is it possible to obtain a substantially large cargo bed space by making the seat substantially flat, but it is also possible to form various types of seat storage spaces as will be described later. In a vehicle seat structure including a front seat with a seat back that can be tilted backward and a rear seat that includes a seat back that can be tilted forward and a seat cushion that is rotatably supported by a vehicle body, The seat cushion of the rear seat is pivotally supported by the vehicle body at its lower front end, and can be stored around the floor under the seat by rotating around the pivot shaft, and the seat back of the rear seat is lower than the seat cushion. Is pivotally supported by the vehicle body, and by rotating and retracting the rear seat cushion, the seat cushion is moved to the original position of the seat cushion, When the seat backs of the rear seats are tilted backward and the seat backs of the rear seats are tilted forward, the seat back of the front seat, the seat back of the rear seat, and the floor surface of the luggage compartment are substantially continuous. It is characterized in that it is configured so as to form a substantially flat surface, preferably the same plane as the floor surface of the rear cargo bed.

Further, in the invention, as a concrete means thereof, the center of a pivot shaft pivotally supporting the seat cushion of the rear seat is located forward, preferably forward, from the front end of the floor surface of the rear seat cushion below the rear seat. A pivot shaft that is disposed at an obliquely upper position and that pivotally supports the seat cushion of the rear seat is preferably a first bracket member that extends from the floor surface of the vehicle, and a first bracket member that is provided at the lower portion of the front end. A first hinge shaft for rotatably connecting the bracket member to the second bracket member, and preferably when the seat cushion of the rear seat is rotated by using the pivot shaft and stored on the floor surface of the foot. The back surface of the seat cushion is configured to be stored in a substantially horizontal state.

More preferably, when the seat cushion of the rear seat is rotated around a pivot axis and stored on the floor surface of the foot, the back surface of the seat cushion is stored and supported in a substantially horizontal state. It is preferable that the front end of the upper surface of the seat cushion is pressed against the rising portion of the floor of the foot of the rear seat.

In another preferred invention, the seat cushion and the seat back of the rear seat are divided into two or more in the vehicle width direction and arranged side by side, and the seat cushions rotate independently of each other. The seat back is provided so as to be retractable, and the divided seat backs are independently provided so as to be tilted forward.

According to the present invention, when the normal use state is changed to the full flat reclining use state, the seat cushion of the rear seat is rotated (inverted) about the pivot axis of the first hinge member, and the rear seat underfloor is rotated. Store on the surface. At this time, since the pivot shaft (rotation center) of the seat cushion is located forward from the front end of the rear seat cushion floor surface below the rear seat, preferably at the front oblique upper position, the front end of the seat cushion is The rear seat cushion is stored on the floor surface of the foot of the seat such that the back surface of the seat cushion is substantially horizontal without being interfered with by the front end side of the floor surface of the rear seat cushion.

Next, the seat back of the front seat is rotated around its pivot axis and tilted backward, and is placed on the back surface of the seat cushion of the rear seat, and the seat back of the rear seat is pivoted on the second hinge member. It is rotated around the support shaft and tilted forward, and placed on the floor surface position of the rear seat cushion before the movement of the rear seat cushion.

By such a rearrangement operation, an extremely long substantially horizontal space from the instrument panel to the seat cushion of the front seats, the seat back of the front seats, the seat back of the rear seats, and preferably the floor surface of the cargo bed, that is, a full flat. A reclining space can be formed. As a result, it is possible to form a space in the vehicle in which a long object such as a carpet / ski or a surf boat can be easily stored.

Further, the form of the full-flat reclining seat has a structure in which the seat cushion and the seat back of the rear seat are divided into two or more in the vehicle width direction, so that each seat cushion rotates independently. The seats are provided so that they can be stored in the floor under the seat, and the divided seat backs are independently provided so as to be able to be tilted forward to form a flat structure in one or more rows in the vehicle width direction. It becomes possible to do.

Further, when the seat cushion of the rear seat is rotated around the pivot shaft and stored on the floor surface of the foot,
The seat cushion of the rear seat is configured so that the front end of the upper surface of the seat cushion is pressed against the rising portion of the floor surface of the foot of the rear seat while the back surface of the seat cushion is stored and supported in a substantially horizontal state. When stored on the floor of the foot, the seat cushion surface (seat surface) directly contacts the floor of the rear foot because it is supported by the pivot and the rising part of the floor of the rear foot. Since it can be supported in a hollow state without doing so, the cushion seat surface will not get dirty even on rainy days.

The invention according to claim 6 does not cause interference with the front seat when the rear seat cushion is turned over, the structure does not interfere with the occupant, and the turning operation is simple and safe. The seat cushion for a rear seat in the vehicle seat structure according to claim 1, wherein the seat cushion for a rear seat can be inverted and stored with a small rotation locus. And a double hinge structure having a hinge shaft respectively, and by selectively utilizing the hinge shaft of the double hinge structure, the seat cushion is inverted and stored in the floor of the rear seat foot while avoiding interference with the front seat. In the vehicle seat structure, the rear seat back and the front seat back are tilted rearward selectively to enable the seat to be substantially flattened.

According to the invention configured as described above, after the seat cushion of the rear seat is inverted and stowed to the floor of the foot of the rear seat while avoiding interference with the front seat, the rear seat back is tilted forward and the front seat is retracted. By tilting the seat back backward, as shown in FIG. 1 (C), the seat layout substantially reaches the inner panel in the front part of the vehicle to form a substantially flat seat. It is possible to obtain a cargo space.

Further, as shown in FIG. 1B, after the seat cushion of the rear seat is inverted and stored in the floor of the foot of the rear seat, only the front seat back is tilted forward to reach the rear side of the front seat. You can get a cargo space.

Further, as shown in FIG. 1 (A), after the seat cushion of the rear seat is erected to the front seat, only the rear seat back is tilted forward to similarly reach the rear side of the front seat. You can get a space. Further, as shown in FIG. 2 (A), by only tilting the front seat back backward, the occupant in the rear seat can sit with the legs extended to the front seat side.

According to a seventh aspect of the present invention, the seat cushion of the rear seat can be easily inverted and stored in the foot floor of the rear seat while effectively avoiding the interference by the front seat. In particular, the double hinge structure is used. Is a double hinge structure including a second hinge shaft provided at a rising portion from the floor surface of the foot to the seat floor surface and a third hinge shaft provided at a seat cushion front end side on the seat floor surface, and the second hinge shaft is provided. The hinge shaft is pivotally supported on the rising portion side, while the third hinge shaft is pivotally supported by a support portion which rotates around the second hinge shaft, and the lock can be released between the support portion and the third hinge shaft. Due to the provision of a locking mechanism.

Accordingly, when the seat cushion is housed in the foot floor while being rotated in an arc shape by using the hinge portion, the seat cushion and the support portion are provided at an intermediate position of the arc-shaped rotation operation by the second hinge shaft. It is possible to perform an arc-shaped turning operation on the third hinge shaft with the lock released.

More specifically, when the split seat is a rear seat, a first operation step of performing an arcuate turning operation by the second hinge shaft and a third hinge shaft in which the lock with the support portion is released. Second operation step in which the arc-shaped pivoting operation is performed up to a position where interference with the rear surface of the front seat is avoided, and after avoiding the interference, the arc-shaped pivoting operation by the second hinge shaft is performed to lay down to the floor of the foot. Including the third operation step.

In order to achieve the invention described in claim 8, there is shown a specific structure, and in particular, it comprises at least a seat back which can be tilted forward and a seat cushion which is rotatably supported by a hinge portion provided on the front end side. In a vehicle seat structure including one split seat, the hinge portion is provided on a fourth hinge shaft provided at a rising portion from a foot floor surface to a seat floor surface and a seat cushion front end side on the seat floor surface. 5th
A double hinge structure including a hinge shaft is formed, and the fourth hinge shaft is directly supported on the rising portion side, while the fifth hinge shaft is supported by a support portion that rotates around the fourth hinge shaft. A lock mechanism capable of unlocking is provided between the support portion and the fifth hinge shaft.

According to the seventh and eighth aspects of the invention, the second hinge shaft (fourth hinge shaft) is directly supported on the rising portion side, while the second hinge shaft (fifth hinge shaft) is A double hinge structure is formed by pivotally supporting a supporting portion that rotates around the second hinge shaft, and an arc-shaped rotation of the second hinge shaft (fourth hinge shaft, hereinafter referred to as a first hinge shaft). At a midpoint of the operation, the front seat is unlocked by releasing the lock with the support portion and performing an arcuate turning operation on the third hinge shaft (fifth hinge shaft, hereinafter referred to as the second hinge shaft). The seat cushion of the rear seat can be easily inverted and stored in the floor of the foot of the rear seat while effectively avoiding the interference caused by.

More specifically, as shown in FIG. 3, the turning operation radius of the first hinge shaft is larger than the turning operation radius of the second hinge shaft, and the shaft fulcrum of the first hinge shaft is Since the second hinge shaft is located on the front seat side and lower side (floor surface side) from the fulcrum of the hinge shaft, first, the first hinge shaft is used to perform an arcuate rotation operation to a position where the seat cushion rises substantially vertically. The seat cushion is moved toward the front seat and the floor side of the foot. (First operation step) In this state, since the second hinge shaft is locked and engaged with the support portion of the first hinge shaft, the second hinge shaft is also on the front seat side and the floor surface of the foot. Move to the side. Then, at the position moved to the front side, by performing an arcuate turning operation on the second hinge shaft unlocked from the supporting portion, the second hinge shaft is moved from the turning operation radius of the first hinge shaft. Due to its small size, it lays down to a nearly horizontal position while avoiding interference with the rear surface of the front seat. (Second Operation Step) Next, after avoiding the interference, the pivotal fulcrum of the first hinge shaft is located on the front seat side and below (floor surface side) from the pivotal fulcrum of the second hinge shaft. Therefore, the arcuate rotation operation by the first hinge shaft makes it possible to tightly store the floor to the floor of the foot. (Third operation step)

In order to realize the operation of the invention, the first hinge shaft is directly pivotally supported on the rising portion side from the foot floor surface to the seat floor surface, and the second hinge shaft is the first hinge shaft. It is necessary to provide a lock mechanism that is pivotally supported by a support portion that rotates around the first hinge shaft and that can release the lock between the support portion and the second hinge shaft.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be exemplarily described in detail below with reference to the drawings. However, unless otherwise specified, the dimensions, shapes, relative positions, and the like of the components described in this embodiment are not intended to limit the scope of the present invention, but are merely illustrative examples. Absent.

FIG. 2B is a view showing a layout showing a normal seated state of the vehicle seat according to the embodiment of the present invention. As shown in the figure, the vehicle seat of the present embodiment is
The front seat (1), the rear seat (2), and the cargo bed floor surface (3). The front passenger seat seat back 34 of the front seat (1) can be tilted backward, and the rear cargo bed floor surface (3). In general, a baggage D1 having a size as shown in the figure can be loaded.

The rear seat (2) is composed of two or three divided seats on the left and right (in the vehicle width direction of the vehicle), and the posture control of each divided seat is individually possible. There is. The split seat located on the rear side of the passenger seat of the rear seat (2) comprises the seat cushion 10 and the seat back 33, and as shown in FIG. 4, the seat back 33 is the rising surface of the floor surface 31 of the rear seat (2). Three
The seat back 33 is rotatably supported by a pivot shaft 37 of a bracket 36 provided on the seat 1a so as to form a flat floor surface with the cargo bed floor surface (3) when the seat back 33 is tilted forward. Forming the thickness and back shape.

In the seat cushion 10 of the split seat, a seat frame 10d forming the skeleton of the seat,
The inversion double hinge mechanism 11 provided with the lock mechanism 20 shown in FIGS. 4 to 7 or the single hinge mechanism shown in FIGS. 8 to 9 is fixed to the rising surface 32a of the rear seat (2) foot floor 32, The rear seat (2), the floor 3 under the foot
2 is configured to be reversible in the direction of arrow G, and at the time of reversing, a space is provided on the floor surface 31 of the rear seat (2) for tilting the seat back 33 forward.

As shown in FIGS. 4 to 7, the double hinge mechanism 11 includes a hinge shaft 15, which is a first hinge shaft pivotally supported by a fixed bracket 12 fixed to the rising surface 32a, and a lower end. A hinge bracket (supporting portion) having a substantially V-shape that is rotatably supported by the hinge shaft 15.
13, a first hinge shaft supporting bracket 14 fixedly provided on the upper end side of the hinge bracket 13, and a hinge serving as a second hinge shaft mounted on the supporting bracket 14 in parallel with the hinge shaft 15. The shaft 16 and a connecting bar 17 that is rotatably fitted to the hinge shaft 16 are provided. The connecting bar 17 is fixed to the front edge of the seat frame 10d so that the frame 10d is shown in FIGS. Lock mechanism 2 as shown in
It is configured to be rotatable with respect to the hinge shaft 15 when in the 0 locked state, and rotatable with respect to the hinge shaft 16 when the lock mechanism 20 is released as shown in FIG.

The lock mechanism 20 includes a U-shaped engaged arm member 21 fixed to the seat frame 10d and the member 2.
Frame 10d that engages with 1 and is centered on the hinge shaft 16
5 is provided with an engaging claw 24 for preventing (locking) the rotation of, and is rotatably supported by a rotary shaft 23 fitted to a holding bracket 22 fixed to the hinge shaft 16, as shown in FIG. As shown, when the seat cushion is seated, the lock state is maintained unless an external force acts on the engaging claw 24, and the seat frame 10d is rotated about the hinge shaft 15.

Next, the seat cushion 10 is attached to the hinge shaft 1.
6, the seat cushion is rotated about the hinge shaft 15 until the seat cushion is almost upright, and then the rear end of the engaging claw 24 is rotated as shown in FIG. The external force causes the engaging groove 24a of the engaging claw 24 to disengage the engaged arm member 21, and the pivoting around the hinge shaft 16 is allowed.

If the engaging groove 24a of the engaging claw 24 applies an elastic force to the engaged arm member 21 in the engaging direction, that is, the locking direction, an external force is applied to the engaging claw 24. Only when the lock is released, that is, the rotation about the hinge shaft 16 is allowed. If the external force is removed, the engaging claw engages with the arm member by the elastic force, and the seat frame 10d can be rotated about the hinge shaft 15.

Therefore, according to such an embodiment, as shown in FIG. 3, the turning operation radius of the first hinge shaft 15 is larger than the turning operation radius of the second hinge shaft 16 and the first hinge shaft 15 is larger. Since the pivot fulcrum of the second hinge shaft 16 is located on the front seat (1) side and on the lower side (floor surface side) of the pivot fulcrum of the second hinge shaft 16, first, the first hinge shaft 15 substantially closes the seat cushion 10. The seat cushion 10 is moved toward the front seat (1) side and the foot floor surface 32 side by performing an arc-shaped turning operation to a position (trajectory A) which stands up substantially vertically. (First Operation Step) In this state, since the second hinge shaft 16 is locked and engaged with the hinge bracket 13 (support portion) of the first hinge shaft 15 via the lock mechanism 20, the second hinge shaft 16 is not locked. Hinge shaft 16
Also moves to the front seat (1) side and the floor surface 32 side of the foot.

When the second hinge shaft 16 is moved to the front side, the second hinge shaft 16 is moved to the first position by performing an arcuate turning operation on the second hinge shaft 16 which is unlocked from the hinge bracket 13 by the lock mechanism 20. Since it is smaller than the turning operation radius of the hinge shaft 15 of No. 1, it falls to a substantially horizontal position by the locus B while avoiding interference with the rear surface of the front seat. (Second operation step)

Next, after avoiding the interference, the first hinge shaft 1
Since the pivot fulcrum of No. 5 is located on the front seat side and below the pivot fulcrum of the second hinge shaft 16 (on the side of the floor surface 32), the arcuate rotation by the locus C by the first hinge shaft 15 is performed. It can be stowed and stowed to the floor 32 under the feet. (Third operation step)

When the seat cushion 10 is returned from the inverted storage state to the normal seating position, the operation reverse to the above may be performed. Further, when the hinge is rotated in the reverse direction by one hinge shaft, the center of rotation is as shown in FIG.
The locus D drawn by the tip forms an interference region 45 with the seat back 34 of the front seat as shown in the figure, and the structure of the hinge axis S interferes with the work of the occupant.

Therefore, according to the present embodiment, the seat cushion 10 of the rear seat (2) can be inverted and stored without receiving the forward flip-up and the interference of the front seat.
As shown in FIG. 1 (A), the seat cushion 10 of the rear seat (2) is flipped forward to stand up, and the standing state 10b.
Then, the seat back 33 is tilted forward to form a tilted state 33a, and the rear seat (2) is moved to the cargo bed floor surface D2.
Layout can be obtained.

Further, as shown in FIG. 1 (B), the cushion 10 of the rear seat (2) is rotated in the reverse direction to reverse the retracted storage state 1.
0a, and the seat back 33 of the rear seat (2) is tilted forward to form the tilted state 33a, and the rear seat (2) is formed.
It is possible to obtain another layout in which is used as the bed floor surface D3.

Further, as shown in FIG. 1 (C), the seat cushion 10 of the rear seat (2) is rotated in reverse to form a reverse stored state 10a, and the seat back 34 of the front seat is tilted backward. Then, the rearward tilted state 34a is formed, and the seat back 33 of the rear seat (2) is tilted forward and the forward tilted state 33 is formed.
By forming a, it is possible to obtain a layout that is used as a long loading bed floor surface D4 that extends to the instrument panel.
Further, as shown in FIG. 2 (A), the seat back 34 of the front seat is tilted backward to form a tilted state 34a, so that a front seat full-flat layout for a temporary rest of the occupant can be obtained. .

8 to 10 show a vehicle seat structure using a single hinge mechanism according to another embodiment of the present invention. In this embodiment, as in the previous embodiment, 2
It is configured to form a front seat-rear seat full flat reclining seat structure as shown in FIG. 1C by a single hinge mechanism without using one hinge (double hinge).

FIG. 8 shows details of the seat cushion 10 of the rear seat (2), which is the main part thereof, and the vicinity of the mounting portion of the seat back 33, and FIG. 9 shows the front and rear seats (1),
The following describes the seat operation procedure from (2) the seat structure in normal use to the full-flat reclining seat structure.

In FIG. 8, the seat cushion 10 of the rear seat (2) has a lower front end thereof on the floor 3 on the rear side of the passenger compartment.
A front hinge bracket 51 fixed to the front end portion 31b of the first unit by a plurality of bolts 58 is rotatably supported around a front hinge shaft 52 fitted into the bracket 51. The upper portion of the front hinge bracket 51 is fixed to the seat frame 10d of the seat cushion 10 with bolts 59.

Further, the front hinge bracket 51
The center of the front hinge shaft 52 inserted into this, that is, the center of rotation of the seat cushion 10 is at a constant height Y from the front end surface 31b of the floor surface 31 at the rear, and at the rear of the floor 32 under the vehicle compartment. It is configured to have a constant protrusion length Z from the rear end of the side rising surface 32a to the front side.

As shown by the solid line in FIG. 9, the height Y and the amount of protrusion Z are 10 when the seat cushion 10 at the rear portion is set to a full flat reclining seat structure by an operation method described later. As shown by ', it is set so as to be stored in the space 32c on the floor 32 under the foot in the following form. That is, the Y and Z dimensions are such that the front end surface 10e of the seat cushion 10 abuts on the rising surface 32a of the floor of the foot and the seat cushion 10
The back surface 10b of the seat cushion is substantially horizontal, and more preferably, it fits snugly in the space with a slight space formed between the abdominal surface 10c of the seat cushion 10 'and the foot floor surface 32. Is set to a large size.

Reference numeral 60 denotes an engaging member attached to the rear portion of the rear seat cushion 10, and the seat cushion 1
In normal use, 0 is supported in a state in which its rear end is locked on the floor surface by the latch of the engaging tool 60, and when the latch of the engaging tool 60 is released, the front side It has a structure that can be rotated around the hinge shaft 52.

Further, in FIG. 8, reference numeral 53 denotes a rear hinge bracket for supporting the seat back 33 of the rear seat (2), which is fixed to the floor surface 31 at the rear of the vehicle body by bolts 57. And the seat back 33 of the rear part is
A lower part of the hinge shaft 54 is rotatably supported around the hinge shaft 54 by a rear hinge shaft 54 which is inserted into the bracket 53.

Incidentally, the seat cushion 10 of the rear seat.
The front end of the upper surface of the seat cushion 10 is made thicker as shown in FIG. When the seat cushion 1 is stowed up, the seat cushion 1 is attached to the rising surface 32a of the floor of the rear seat underfoot with the back surface of the seat cushion 10 stored and supported in a substantially horizontal state.
The seat cushion 10 of the rear seat is configured to be pressed against the front end 10g of the upper surface of the foot 0.
When it is stored on 2, the front hinge shaft 52 and the rising surface 32a of the rear foot floor are supported by two-point support, so that the surface (seat surface) of the seat cushion directly contacts the rear foot floor. Since it can be supported in the hollow state (void 32c) without doing so, the cushion seat surface will not be contaminated even on rainy days.

FIG. 10 shows the overall arrangement of the seat constructed as described above in the passenger compartment. 10A shows a normal use, and FIG. 10B shows a full-flat reclining use. As shown in FIG. 10, the seat cushion and the seat back configured as described above have two rows in the vehicle width direction, and each row has a normal use ((A) of FIG. 10) to a full flat reclining use (FIG. 10). (B)) is provided so that it can be recombined. Incidentally, it goes without saying that the reconfigurable seat structure may have one row or three or more rows.

The usage of the vehicle seat constructed as described above will be described with reference to FIGS. 9 and 8. The two-dot chain line in FIG. 9 indicates normal use, and the solid line indicates full-flat reclining use. That is, during normal use, as shown by the chain double-dashed line in FIG. 9, the seat backs 34 and 33 of the front seat (1) and the rear seat (2) are seat cushions 35, 10 by a lock mechanism (not shown). On the other hand, the seat cushion 10 of the rear seat (2) is locked at a substantially right angle, and the seat cushion 10 is placed at the regular position on the floor surface 31 of the rear part, and the rotation thereof is locked by the engagement tool 60.

Next, when changing from the above state to the use of full flat reclining, first, the rear seat (2)
The engagement member 60 of the seat cushion 10 is removed, and the cushion 10 is rotated about the front hinge 52 by about 180 ° as shown by an arrow in FIG. 9Z and set on the floor 32 of the foot. In this case, since the axial center of the front hinge shaft 52 is arranged in front of and above the rising surface 32a of the foot floor surface 32 as described above, the seat cushion 10 is provided.
Is a space 32 behind the front seat (1) on the floor 32 under the foot.
By fully fitting into c and contacting the entire surface 10e with the rising surface 32a, the back surface 10b is maintained in a substantially horizontal state, and the form of 10 in FIG. 9 is obtained.

Next, the seat back 34 of the front seat (1)
, Unlock the hinge, and attach the hinge shaft 5 as shown by the arrow Y in FIG.
Rotate it back about 6 times and fold it down, put it on the back surface 10b of the seat cushion 10 'on the rear side, and refer to 34' in FIG.
The form

Next, the seat back 3 of the rear seat (2)
The lock of No. 3 is unlocked, and the hinge shaft 54 is rotated forward as shown by an arrow X in FIG. 9 to be tilted, and set on the floor surface 31 at the rear portion to form 33 ′ in FIG. By the above-mentioned rearrangement operation, the seat cushion 35, the seat back 34 'of the front seat and the seat back 33' of the rear seat (2).
As shown by the solid line in FIG. 9, the seat cushions 10 ′ for the rear seats are arranged on one plane in the form of being housed in the space 32 c on the floor 32 of the front seat (1) behind the front seat (1), and seats for full flat reclining. The structure is obtained.

Thus, the simple operation of rotating the seat cushion and the seat back only three times without using the complicated double hinge mechanism as in the embodiment shown in FIGS. As shown in (B), it is possible to obtain an extremely long flat space from the instrument panel 70 to the front seat cushion 35, the front seat back 34 ', and the rear seat back 33' to the cargo floor D. .

[0057]

According to the present invention, therefore, when the seat cushion is turned over, the front cushion and the front seat cushion do not interfere with each other, and the hinge structure does not interfere with the occupant. The reverse storage operation is simple and safe, and the reverse storage is possible with a small rotation trajectory, and the layout of the front and rear seats capable of loading long objects can be changed. In the present invention according to claims 1 to 5, To store the seat cushion on the floor surface of the foot of the seat by rotating (reversing) around the pivot axis of a single hinge member provided at the lower front end of the seat cushion without using the double hinge mechanism as described above. Due to the extremely simple structure,
In addition, an extremely long space from the instrument panel, through the surface of the seat, to the floor of the luggage compartment by a simple method, in which the seat cushion and the seat back are only rotated three times, is the same as the above. Can be formed with. Further, according to the invention of claims 6 to 8, since the seat cushion of the rear seat is provided with the double hinge mechanism for reversing and the lock mechanism for appropriately locking the first hinge shaft, the seat cushion does not interfere with the front seat. It becomes possible to store the rear seat under the floor under the foot, and by tilting the seat back of the front seat back on it, it is possible to form a flat floor surface without unevenness that connects to the rear cargo floor surface, The entire passenger compartment can be used effectively, and it is easy to mount long products.

[Brief description of drawings]

FIG. 1 shows a layout of a vehicle seat of the present invention,
(A) is a schematic diagram showing a layout formed by the front seat of the rear seat, and (B) is formed by reversing and storing the seat cushion of the rear seat on the floor surface under the foot of the rear seat and tilting the seat back forward. Schematic diagram showing the layout,
(C) is a schematic view showing a layout formed by reversing and storing the seat cushion of the rear seat on the floor of the foot of the rear seat, tilting the seat back of the front seat backward, and tilting the seat back of the rear seat forward.

FIG. 2A is a schematic diagram showing a layout formed by tilting a seat back of a front seat backward, and FIG. 2B is a schematic diagram showing a seat cushion seating position.

FIG. 3 is an operation diagram showing a rotation locus at the time of reversing rotation of a seat cushion of a rear seat.

FIG. 4 is a side view showing the outline of the internal configuration of the seat cushion of the rear seat of FIG. 1 showing the state of the configuration change depending on the sitting position and the inverted storage position.

FIG. 5 is a perspective view showing a relationship between a seat cushion inverting double hinge and a lock mechanism in the seat cushion seating position of FIG. 4;

6 is a perspective view showing a relationship between a double hinge for reversing the seat cushion and a lock mechanism when the seat cushion of FIG. 4 is flipped up.

7 is a perspective view showing a relationship between a reversing double hinge and a lock mechanism when the lock mechanism of the seat cushion of FIG. 4 is disengaged and rotated only by a second hinge shaft.

FIG. 8 is an enlarged side view of the vicinity of a rear seat cushion of a vehicle seat according to another embodiment of the present invention.

FIG. 9 is an operation diagram showing a procedure of a rearrangement operation from normal use to full flat reclining use in the other embodiment.

FIG. 10 is a perspective configuration view showing an arrangement of a vehicle interior seat in the embodiment, (A) is a normal use, and (B) is a full flat reclining use.

[Explanation of symbols]

 10 Seat cushion for rear seat (2) 10a Inverted storage state 10d Seat frame 11 Double hinge mechanism for inversion 15 Hinge shaft 16 Hinge shaft 17a Clamp mechanism spindle 20 Lock mechanism 31 Rear floor 32 Rear seat (2) Foot floor 32a Standing surface (rear part of the floor under the foot) 33 Seat back of the rear seat (2) 34 Seat back of the front seat 35 Seat cushion of the front seat (1) 51 Front hinge bracket 52 Front hinge shaft 53 Rear hinge bracket 54 Rear Side hinge shaft 55 Hinge bracket of front seat (1) 56 Hinge shaft of front seat (1) D1 to D4 Rear cargo bed floor

Front page continued (72) Koichi Kaminaka, 4-21-1, Shimomaruko, Ota-ku, Tokyo Mitsubishi Motors Engineering Co., Ltd. (72) Masanori Sugiura 4--21-1, Shimomaruko, Ota-ku, Tokyo Mitsubishi Motors Engineering Within the corporation

Claims (8)

[Claims] 1. A vehicle seat structure comprising a front seat having a seat back which can be tilted backward, and a rear seat which is composed of a seat back which can be tilted forward and a seat cushion which is rotatably supported by a vehicle body. The seat cushion of the rear seat is pivotally supported by the vehicle body at its lower front end, and is rotatable around the pivot shaft so that the seat cushion can be stowed on the floor surface of the foot of the seat. While being pivotally supported by the vehicle body, by rotating the rear seat seat cushion and tilting it forward after storing, it is positioned in the original position of the seat cushion, and the seat back of the front seat is in the tilted state, A surface where the seat back of the front seat, the seat back of the rear seat, and the floor surface of the luggage compartment are substantially continuous when the seat back of the rear seat is in the forward tilted state. A vehicle seat structure, wherein the vehicle seat structure is configured to form a. 2. The center of a pivot shaft that pivotally supports the seat cushion of the rear seat is disposed at a position forward from the front end of the floor surface of the rear seat cushion below the rear seat, preferably at an obliquely upper front position. 2. The vehicle seat according to claim 1, wherein when the seat cushion of the rear seat is rotated by using an axle and stored on the floor surface of the foot, the back surface of the seat cushion is stored in a substantially horizontal state. Construction. 3. The first pivot member pivotally connects a first bracket member extending from a floor surface of the vehicle and a second bracket member provided at a lower portion of the front end. And a hinge shaft, wherein the first bracket member extends toward the rear of the vehicle by a predetermined length from a shaft fulcrum that pivotally supports the first hinge shaft, and then folds toward the floor surface. The vehicle seat structure according to claim 1, wherein the vehicle seat structure is bent and extended and is attached to the floor surface. 4. When the seat cushion of the rear seat is rotated around a pivot and stored on the floor surface of the foot, the rear portion of the seat cushion is stored and supported with the back surface thereof substantially horizontal. 2. The vehicle seat structure according to claim 1, wherein the front end of the upper surface of the seat cushion is pressed against the rising portion of the floor of the seat foot. 5. A seat cushion and a seat back of the rear seat are divided into two or more in a vehicle width direction and arranged side by side, and each seat cushion independently rotates and can be stored in the floor portion of the seat foot. The vehicle seat structure according to claim 1, wherein the divided seat backs are provided so as to be able to be tilted forward independently of each other. 6. The vehicle seat structure according to claim 1, wherein the seat cushion of the rear seat has a double hinge structure having a hinge shaft at each of a front end side thereof and a rising portion of a floor surface of a rear seat foot. After selectively retracting the seat cushion to the floor of the foot of the rear seat while avoiding interference with the front seat by selectively utilizing the hinge axis of the structure, the front seat back and the front seat back are tilted forward. A vehicle seat structure that allows the seats to be substantially flattened by selectively performing. 7. A double hinge having a double hinge structure comprising a second hinge shaft provided at a rising portion extending from a foot floor surface to a seat floor surface and a third hinge shaft provided at a seat cushion front end side on the seat floor surface. In addition to the structure, the second hinge shaft is directly supported on the rising portion side, while the third hinge shaft is supported on the support portion that rotates around the second hinge shaft, 7. The vehicle seat structure according to claim 6, wherein a lock mechanism capable of unlocking is provided between the three hinge shafts. 8. A vehicle seat structure comprising at least one split seat comprising a seat back which can be tilted forward and a seat cushion which is rotatably supported by a hinge part provided on the front end side, wherein the hinge part is provided. Is a double hinge structure including a fourth hinge shaft provided on a rising portion from the floor surface of the foot to the seat floor surface and a fifth hinge shaft provided on a front end side of the seat cushion on the seat floor surface. The hinge shaft is pivotally supported directly on the rising portion side, while the fifth hinge shaft is pivotally supported on a support portion which rotates around the fourth hinge shaft, and the lock can be released between the support portion and the fifth hinge shaft. A vehicle seat structure characterized by the provision of a simple locking mechanism.