JP3317442B2 - Vehicle folding seat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foldable seat for a vehicle, and more particularly, to a foldable operation which can be simplified and a force required for the operation (operating force) can be reduced as compared with the conventional case. .

[0002]

2. Description of the Related Art In passenger cars, the last row of seats is often provided in a foldable manner so that the space in the luggage compartment behind the vehicle can be expanded as required. FIG. 10 shows a first conventional example. In this case, the lower end of the seat back 101 is rotatably mounted on the floor of the vehicle, and the seat cushion 102 is fixed to the floor. When the seat is folded, the seat back 101 is tilted forward of the vehicle and overlaps the upper surface of the seat cushion 102.

FIG. 11 shows a second conventional example. In this case, the lower end of the seat back 201 is rotatably mounted on the floor of the vehicle, and the front end of the seat cushion 202 is also rotatably mounted on the floor. When folding the seat, the seat cushion 202 is raised forward, and then the seat back 201 is tilted forward to overlap the seat back on the upper surface of the floor.

FIG. 12 shows a third conventional example. In this case, the lower end of the seat back 301 and the seat cushion 30
2 and the rear end of the seat cushion 302
The lower part 303 of the floor is rotatably linked to the lower part 303 of the floor by a leg 304. When folding the seat, the seat back 301 is folded down and overlapped on the seat cushion 302. Next, both the seat back 301 and the seat cushion 302 are moved onto the stepped lower part 303 of the floor while supporting them by hand.

FIG. 13 shows a fourth conventional example. Also in this case, the lower end of the seat back 401 and the seat cushion 40
2 is the same as the third conventional example in that the rear end is rotatably connected.
The lower part 403 of the floor and the leg 404 are not connected. When the seat is folded, the seat cushion 402 is flipped up toward the seat back 401 to unite the two, the legs 404 are folded, and the legs are moved to the lower steps 403 of the floor while supporting them by hand.

A fifth conventional example is disclosed in Japanese Utility Model Publication No. 64-6350. This is a type of the second conventional example, but discloses a configuration in which a leg is folded in conjunction with a tilt of a seat back. FIG. 14 shows this state, in which a rotating shaft 505 that rotates integrally with the seat back 501 and a rotating shaft 50 that rotates integrally with the rear leg 503.
7 is provided with gears 504 and 506, respectively, and the rotation of both gears is linked. 508 is a roller provided at the lower end of the rear leg 503. A guide rail 509 is fixed to the floor of the vehicle and guides the rollers. Reference numeral 502 denotes a seat cushion that rotates around a rotation shaft (not shown) in front of the vehicle. In order to fold the seat according to this conventional example, first, the seat cushion 502 is turned forward around a front turning axis, and then the lock of a lock device (not shown) for preventing the rotation of the gear is released. The back 501 is rotated forward about a rotation shaft 505. Then, the gears 504 and 506 cooperate to rotate the leg 503 clockwise about the rotation shaft 507 in the figure (hereinafter referred to as right rotation). The roller 508 moves to the left in the figure while rolling on the guide rail 509, and
03 is folded.

[0007]

However, in the first conventional example, since the seat back 101 is overlapped with the seat cushion 102, the rear surface 103 of the seat back 101 is higher than the loading floor 104, There was a problem that the cargo was likely to be unstable.

Further, in the second to fifth conventional examples,
When the seat back is folded, the height of the back of the seat back has been reduced and the height has been improved to match the height of the bed, but it requires two movements to fold and each movement A lock mechanism was provided, and thus two lock operations were performed. Further, the fifth conventional example achieves a novel object of folding and standing the seat leg only by operating the seat back. However, since gears are used to link the seat back and the seat legs, the number of parts is large, and there is a problem in operation and durability. In addition, since the lower end of the seat leg slides on the floor, a lock mechanism is required for fixing the seat leg.

The gist of the present invention to solve the above-mentioned problem is to provide a seat including a seat cushion and a seat back arranged at the rear of the seat cushion on a floor between the rear of a driver's seat row of a vehicle and a rear carrier. The seat back is provided at a lower portion of the seat back with a pivotal support portion for tilting the seat back in the forward direction of the vehicle, and the seat cushion is lowered in the front lower direction of the vehicle in conjunction with the tilting operation. In a vehicle folding seat, wherein the seat back is a seat back.
When the lower part of the car is pivotally supported on the floor,
The seat cushion and the seat are connected via a substantially L-shaped stay.
To the front of the substantially L-shaped stay.
Part is fixed to the rear side of the seat cushion.
The raised part that extends upward and behind the rear of b
Seat on the side and above the pivot support
Pivotally attached to the side of the bag
The structure of the folding seat of the vehicle characterized by the above.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In FIG. 1, reference numeral 1 denotes an automobile suitable for applying the present invention. 2 in FIG.
Indicates the interior of the vehicle, and reference numerals 3 and 4 denote a lower floor and an upper floor, respectively, which are provided with a height difference by a step portion 5 formed on the floor of the vehicle.
Is a loading floor, and a space formed above the loading floor is used as a luggage space. A front seat 6 is provided on the lower floor 3, and a rear seat 7 is provided above the step portion 5.

FIG. 3 is a left side view of the rear seat 7. 8
Denotes a seat back and 9 denotes a seat cushion, both of which are pivotally connected by a rotating shaft 10. 11 is a bolt 13 on a frame 12, which forms the skeleton of the seat cushion 9,
The stay is a substantially L-shaped stay fastened by 13 or the like.

FIG. 4 is a cross-sectional view of the rotating shaft portion 10. As shown in FIG. Reference numeral 14 denotes a frame of the seat back 8, and nuts 15, 15 are fixed inside by welding or the like. 38
Is a rear leg on the left side, and 16 is a bridge member formed by bending a steel plate. Both of these are fastened to the frame 14 by bolts 17, 17. The nut 15 is also fixed to the center of the bridge member 16 inside by welding or the like. The bridge member 16 and the stay 11 are provided with holes 16a and 11a, respectively, and are pivotally connected to the screw 20 and the nut 15 via a bush 18 and a washer 19 with a flange.

Next, returning to FIG. 3, the structure of the front leg will be described. A pair of front brackets 21 are fixed to the front of the frame 12 of the seat cushion.
A front leg 22 is rotatably attached to the front bracket 21. The front leg 22 includes a pair of upper legs 2
3 and a gate-shaped lower leg 24 which are joined together. The upper leg 23 is fastened to the front bracket 21 and the rotating shaft 25, and the lower leg 24 is fastened to the floor of the vehicle. It is rotatably mounted by floor brackets 26 and 26 and a rotation shaft 27.

FIG. 5 shows a cross section of the left half of the front leg 22, the right half being structurally symmetric. Describing the rotation shaft portion 25, shaft holes 28 and 29 are respectively formed in the front bracket 21 and the upper leg 23, and a pin 31 is fitted through a pair of flanged cylindrical bushes 30 and 30. ing. Reference numeral 32 denotes a push nut for preventing the pin 31 from coming off.

Next, the rotation shaft 27 will be described. At the lower end of the lower leg 24, a cylindrical pipe 33 is welded as a bearing. A pair of flanged cylindrical bushes 3
4 and 34 are inserted into the pipe 33, and a pin 36 is fitted together with a hole 35 of the front floor bracket 26. 37
Is a push nut for retaining the pin 36.

Although the front floor bracket 26 is used for a pair of left and right seats, the shape of the mounting seat surface is changed according to the floor shape of the vehicle. In the case of this embodiment, the mounting seat surface of the left front floor bracket toward the front of the vehicle is 26a in FIG. 3, and the mounting seat surface of the right front floor bracket is 26b.

Next, the rear leg will be described. In FIG. 3 which has already been cited, reference numeral 38 denotes a left rear leg, which is integrally extended from the lower end of the seat back and provided as a pair of left and right. At the lower ends of the rear legs, rear floor brackets that enable rotation in the front-rear direction are respectively pivoted and fixed to the floor of the vehicle.
Further, the one rear floor bracket 40 is provided with a lock mechanism for maintaining the rotation angle of the rear leg at an appropriate position. As described above, since the rear leg and the seat back are integrated, the lock mechanism is operated to maintain the posture at the standing position and the folded position of the seat back.

FIG. 6 shows a lock mechanism provided on one rear floor bracket 40. Reference numeral 38 denotes the one rear leg, which is formed of a thick steel plate or the like, and is fastened to the side surface of the seat back with a plurality of holes 38a with bolts or the like. Reference numeral 38b denotes a shaft hole serving as a rotation center of the rear leg, and reference numerals 38c and 38d denote engagement portions for locking the rotation of the rear leg.

Reference numeral 41 denotes a base plate of a lock mechanism which also serves as a rear floor bracket, and has a shaft hole 38b of the rear leg above.
And a flange 43 at the lower end, and fastened to the floor of the vehicle with bolts or the like. Reference numeral 44 denotes a stopper implanted in the base plate 41, which abuts on the rear leg 38 in accordance with the standing position and the folding position of the seat back to regulate the rotation range thereof.

Reference numeral 45 denotes a meshing piece, which is integrally formed with a meshing portion 45a that meshes with the meshing portions 38c and 38d of the rear leg 38 so as to face and mesh with the pin 46 that is implanted in the base plate 41 through a shaft hole 45b. It is pivoted. A cam surface 45c is engaged with a cam lever described later.

Reference numeral 47 denotes a cam lever having a substantially L-shape. The center of the cam lever is pivotally attached to a pin 48 planted on the base plate 41, and a projecting cam 47a is integrally formed at one end. It is engaged with the surface 45c. A pin 49 is implanted at the other end of the cam lever 47 and engages with a wire lever described later.

A wire lever 50 has one end pivotally connected to a pin 51 implanted in the base plate 41, and a wire 52 attached to the other end. In the center of the wire lever 50, a long hole 50a that engages with the pin 49 of the cam lever, and the other end of the tension coil spring 53 that engages with the engaging portion 41a provided on the base plate 41 at one end. An engagement hole 50b is provided.

On the other hand, the outer cylinder 54 of the wire 52 is located on the opposite side of the base plate 41 with the locking mechanism interposed therebetween, and is fixed to a holder plate (not shown) fixed to the pins 42, 46 and 48.

FIG. 7 is a perspective view of the seat of the present invention as viewed obliquely from the rear right. The same components as those in FIG. 3 which is a left side view are denoted by the same reference numerals, and description thereof will be omitted. However, the right rotation shaft 10 is configured by pivotally connecting the stay 11 directly to the frame of the seat back 8. Reference numeral 55 denotes a right rear leg, which is formed by projecting a pipe material forming a skeleton of the seat back 8 downward as it is. Reference numeral 56 denotes a rear floor bracket which is fastened to the floor of the vehicle. The rear leg 55 and the rear floor bracket 56 are pivotally connected to each other by a structure similar to that of the above-described rotation shaft 27 in FIG.

An unlocking device 57 for unlocking the lock mechanism is provided on the back of the seat back. The unlocking operation device 57 includes a base plate 58 fixed to the back surface of the seat back, and an unlocking knob 59 sliding on the base plate. The wire 52 and the outer cylinder 54 connected to the lock mechanism are connected to a lock release knob 59 and a base plate 58, respectively, so that the lock of the lock mechanism can be released by operating the lock release knob.

Now, the operation of the present invention in the above configuration will be described. FIG. 8 shows a standing state of the seat. At this time, the rear leg 38 is in a state of a solid line in FIG.
The meshing portion 45a of the meshing piece 45 meshes with 8d. Therefore, even when the occupant sits on the seat, the upright state can be maintained.

Next, to fold the seat, the lock release knob on the back of the seat back is operated to slide the wire 52 in the pulling direction with respect to the outer cylinder 54. Then
6, the wire lever 50 rotates counterclockwise around the pin 51 against the pulling force of the spring 53.
Then, since the long hole 50a of the wire lever moves upward, the pin 49 of the cam lever 47 also moves upward. Therefore, the cam lever 47 rotates clockwise about the pin 48. Then, the projecting cam 47a of the cam lever becomes
5 while engaging with the concave cam 45c of FIG.
Rotate counterclockwise around 6. Thus, the engagement between the engagement portion 38d of the rear leg 38 and the engagement portion 45a of the engagement piece 45 is released.

Thus, when the lock of the lock mechanism provided on one of the rear legs is released, the seat back integrated with the rear legs can be tilted forward. When the seat back is pushed forward, the seat cushion 9 connected by the rotating shaft 10 also moves forward, and the front leg 22
And it moves downward by the link action of the rear leg 38. FIG. 9 shows a state in which the seat is completely folded. At this time, the lock mechanism is in the state of the two-dot chain line in FIG. 6, and the meshing portion 38c of the rear leg 38 and the meshing portion 45a of the meshing piece 45 mesh with each other. Then, the posture of the entire seat is locked.

Although the illustrated embodiment has been described above, the present invention is not limited to the above embodiment, and all changes, modifications, and additions obvious to those skilled in the art are included in the scope of the technical idea of the present invention. For example, the mounting position of the lock mechanism may be on the rear leg side instead of the floor bracket side. In the embodiment, the rotation of the left rear leg is locked. However, the rotation of the right rear leg, the front leg, and further, the rotation of the seat back and the seat cushion may be locked. .

[0030]

As described above, according to the present invention, simply by operating the seat back, the front leg and the rotating shaft support are folded in conjunction with each other, and the folding of the leg and the folding of the seat are performed in two stages. Eliminates the hassle of operating. Further, even during the operation, the front leg and the rotating shaft support portion support most of the load on the seat, so that the operation force can be reduced. further,
In this embodiment, since the lock release knob is provided on the back surface of the seat back, the operation can be shifted from the release operation to the folding operation of the seat as it is, and the whole operation can be smoothly performed.

[Brief description of the drawings]

FIG. 1 is a side view of an automobile to which the present invention is applied.

FIG. 2 is a side view showing the cabin of the automobile shown in FIG.

FIG. 3 is a left side view showing an automobile seat according to one embodiment of the present invention.

FIG. 4 is an enlarged sectional view taken along line AA of FIG. 3;

FIG. 5 is an enlarged sectional view taken along line BB of FIG. 3;

FIG. 6 is an operation explanatory view of a rear leg and a lock mechanism.

FIG. 7 is a right rear perspective view of the seat.

FIG. 8 is an operation explanatory view showing a standing state of a seat.

FIG. 9 is an operation explanatory view showing a folded state of the seat.

FIG. 10 is an operation explanatory diagram of the first conventional example.

FIG. 11 is an operation explanatory view of a second conventional example.

FIG. 12 is an operation explanatory view of a third conventional example.

FIG. 13 is an operation explanatory view of a fourth conventional example.

FIG. 14 is an operation explanatory view of a fifth conventional example.

[Explanation of symbols]

 3, 4 floor 7 rear seat 8 seat back 9 seat cushion 22 front leg 38 rear leg 40 rear floor bracket

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B60N 2/36

Claims (3)

(57) [Claims] 1. A seat comprising a seat cushion and a seat back disposed at a rear portion of the seat cushion is arranged on a floor between a rear of a driver's seat row of a vehicle and a rear carrier, and the seat back is provided at a lower portion of the seat back. Is provided with a pivot shaft support portion for tilting the seat cushion in the forward direction of the vehicle, and the seat cushion is lowered in the front lower direction of the vehicle in conjunction with the tilting operation, and at the same time, the seat back is folded on the seat cushion. The seat back
The lower part of the back is pivotally mounted on the floor
At the same time as the seat cushion
Between the seat and the seat back, and in front of the substantially L-shaped stay.
Of the seat cushion to the rear side of the seat cushion,
The upright portion that extends upward and behind the rear of the L-shaped stay
On the side of the tobacco and above the pivot support
Pivotally attached to the side of the seat back
A folding seat for a vehicle, characterized in that: 2. The seat cushion according to claim 1, wherein a front portion of the seat cushion is a seat.
Stand up with the back up, defeat the seat back
To the floor via the front legs that fall forward
The contractor is characterized in that it is movably mounted on the shaft.
The folding seat for a vehicle according to claim 1. 3. Near the pivot support at the lower part of the seat back.
A seat back lock mechanism is provided on the
A lock release operation device with a lock lever
The lock lever and the lock portion of the lock mechanism.
Operate the lock lever and lock the lock mechanism.
After releasing the locking part, move the seat back
Seat linked to falling down in front of the vehicle as a heart
The front cushion through the substantially L-shaped stay.
Sink at the same time as sinking on the floor centering on the legs
The feature is that the back is folded on the seat cushion
A folding seat for a vehicle according to claim 2.