JP2002293180A - Folding seat of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate a folding operation of a seat of a vehicle. SOLUTION: A seat back 8 of the seat 7 has a rear leg 38 extending integrally from the seat back 8, and a lower end of the rear leg 38 is turnably mounted on the vehicle. A front part of a seat cushion 9 is turnably mounted with an upper end of a front leg 22. The seat 7 has a stay 11 connecting a frame 14 of the seat back 8 and a frame 12, and one end of the stay 11 is fixed by bolts 13 to a rear part of the frame 12 and the other end of the stay 11 is turnably mounted on the frame 14 of the seat back 8. When the seat back 8 is inclined forward, the seat cushion 9 is sunk forward and downward, and the seat back 8 is folded onto the seat cushion 9.

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 seat for a vehicle which can be easily folded and fixed in a folded state.

[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. 11 shows a first conventional example. In this case, 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. 12 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. 13 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. 14 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 and the leg 404 of the floor are not connected to each other so as to be rotatable. 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. 15 illustrates 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.

[0009]

The gist of the present invention to solve the above problem is to dispose a seat comprising a seat cushion and a seat back arranged at a rear portion of the seat cushion in a vehicle, and to provide a seat under the seat back. A pivot shaft for tilting the seat back forward of the vehicle is provided, and when the seat back is tilted, the seat cushion is moved forward and downward of the vehicle, and at the same time, the seat back is folded on the seat cushion. In the folding seat, an upper end of a front leg is rotatably mounted in front of the seat cushion, and a stay for connecting the cushion frame of the seat cushion and the seat frame of the seat back is provided. One end of the stay is provided at a rear portion of the cushion frame. Part, and the other end of the stay is rotatably attached to the seat frame, Serial The near rotation shaft support section of the lower seat back frame to provide a lock mechanism of the seat back,
And an unlocking device for unlocking the lock mechanism is provided above the seat back, and the unlocking device and a wire lever for unlocking the lock mechanism are connected by a wire, and the unlocking is performed. After unlocking the lock mechanism by rotating the wire lever by sliding the wire in the pulling direction by operating the operating device, the seat back is tilted forward of the vehicle around the pivot shaft support. The structure of the folding seat of the vehicle which is folded by being made. Further, the gist of the present invention for solving the above problem is to dispose a seat including a seat cushion and a seat back arranged at a rear portion of the seat cushion in a vehicle, and to attach the seat back to a lower portion of the seat back in front of the vehicle. A folding shaft support portion for tilting the seat back, and when the seat back is tilted, the seat cushion is moved forward and downward of the vehicle, and at the same time, the seat back is folded on the seat cushion. A front end of the front leg is rotatably mounted, a stay for connecting the cushion frame of the seat cushion and the seat frame of the seat back is provided, and one end of the stay is fixed to a rear portion of the cushion frame; The other end of the stay is rotatably mounted to the inside of the other end of the stay. Arranged a bracket, it arranged rear legs between the other end portion and the bracket of the stay, and arranging the lock mechanism to the bracket which is arranged on the inner side of the other end portion of the stay,
And an unlocking device for unlocking the lock mechanism is provided above the seat back, and the unlocking device and a wire lever for unlocking the lock mechanism are connected by a wire, and the unlocking is performed. After unlocking the lock mechanism by rotating the wire lever by sliding the wire in the pulling direction by operating the operating device, the seat back is tilted forward of the vehicle around the pivot shaft support. The structure of the folding seat of the vehicle which is folded by being made.

The rear leg is integrally extended from the seat back, the lower end thereof is rotatably mounted on the vehicle, and the upper end of the front leg is rotatably mounted in front of the seat cushion. Since a stay that connects the frame and the seat frame of the seat back is provided, one end of the stay is fixed to the rear of the cushion frame, and the other end of the stay is rotatably attached to the seat frame,
By operating the seat back to fall forward, the seat cushion can be moved forward and downward, and the seat back can be folded on the seat cushion, and the front leg and the rear leg can be folded at the same time. Further, since a lock mechanism is arranged near the rotation shaft support, an unlocking operation device for unlocking the lock mechanism is arranged above the seat back, and the unlocking operation device and the wire lever are connected by a wire. The lock mechanism can be released by rotating the wire lever by sliding the wire in the pulling direction.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the description, the expressions on the right and left sides are directed toward the front of the vehicle. In FIG. 1, reference numeral 1 denotes an automobile suitable for applying the present invention. In FIG. 2, reference numeral 2 denotes the interior of the vehicle,
3 and 4 are a lower floor and an upper floor, respectively.
The height difference is provided by the step portion 5 formed on the floor of the vehicle, and the upper floor 4 is used as 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. Reference numeral 11 denotes a substantially L-shaped stay which is fastened by bolts 13, 13 and the like to the outside of a frame 12 whose one end forms the framework of the seat cushion 9.

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 other end sides of the bridge member 16 and the stay 11 are provided with holes 16 a and 11 a, respectively, and are connected to the screw 20 and the nut 15 via a bush 18 with a flange and a washer 19.

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.

The front floor bracket 26 is used for a pair of left and right seats, but 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. The lower ends of the rear legs are pivotally attached to a rear floor bracket fixed to the floor of the vehicle so as to be rotatable in the front-rear direction. Further, the left 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 the left rear floor bracket 40. Reference numeral 38 denotes the left 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 is provided above the shaft hole 38b of the rear leg.
A rotating shaft supporting portion 42 for supporting the
And fastened to the vehicle floor 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 which meshes with and meshes with the meshing portions 38c and 38d of the rear leg 38. The pin 45 is formed on the base plate 41 by a shaft hole 45b. It is pivoted. A cam surface 45c is engaged with a cam lever described later.

Reference numeral 47 denotes a substantially L-shaped cam lever. The center of the cam lever is pivotally mounted on 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 above-mentioned locking mechanism interposed therebetween, and is fixed to a holder plate (not shown) fixed to the rotating shaft support 42 and the pins 46 and 48. I do.

FIG. 7 is a perspective view of the seat of the present invention 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 pivot 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 the upright state of the seat. At this time, the rear leg 38 is in the state shown by the solid line in FIG. 6, and the engagement portion 45a of the engagement piece 45 engages with the engagement portion 38d under the action of the spring 53. . Therefore, the seat back integrated with the rear leg 38 can also maintain this upright state.

Next, to fold the seat, the lock release knob on the back of the seat back is operated. FIG. 9 shows the operation of the lock mechanism at that time. By operating the lock release knob, the wire 52 is slid in the pulling direction with respect to the outer cylinder 54. Then, the wire lever 50 moves the spring 5
3 counterclockwise with respect to the pin 51 against the pulling force of 3. 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 rotates the meshing piece 45 counterclockwise about the pin 46 while engaging with the concave cam 45c of the meshing piece 45. 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.

In this way, when the lock of the lock mechanism provided on the left rear leg is released, the seat back integrated with the rear leg can be tilted forward about the rotary shaft support 42. . When the seat back is pushed forward, the seat cushion 9 connected by the rotating shaft 10 also moves forward, and moves downward by the linking action of the front leg 22 and the rear leg 38. In this intermediate state, even if the hand is released from the lock release knob, the space between the meshing portions 38c and 38d of the rear leg 38 is smooth, so that the meshing portion 45a slides and the seat back can be rotated. FIG. 10 shows the seat fully folded, with the rear legs in FIG.
And the engagement portion 38c of the rear leg 38 and the engagement portion 4 of the engagement piece 45 by the action of the spring 53.
5a are engaged with each other, and 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-described 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, in the embodiment, the rotation of the seat back is locked by attaching the lock mechanism to the rear leg side of the floor bracket, but may be replaced by 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. .

[0031]

As described above, according to the present invention, at the lower portion of the seat back, the pivot shaft for tilting the seat back forward of the vehicle is provided, and the upper end of the front leg is rotated forward of the seat cushion. A stay for movably mounting and connecting the cushion frame of the seat cushion and the seat frame of the seat back is provided, one end of the stay is fixed to the rear of the cushion frame, and the other end of the stay is rotatable on the seat frame. Since it is attached, the seat cushion can be moved forward and downward by simply operating the seat back, and the seat back can be folded on the seat cushion.Furthermore, the front leg and the rear leg are linked and folded, There is no need to operate the folding of the sheet and the folding of the sheet in two steps. Furthermore, since the lock mechanism is arranged near the rotation shaft support, and the lock release operation device for releasing the lock of the lock mechanism is disposed above the seat back, the lock release operation device and the wire lever are connected by a wire. The lock mechanism can be released by rotating the wire lever by sliding the wire in the pulling direction.

[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 in FIG. 3;

FIG. 6 is a structural 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 the seat.

FIG. 9 is an operation explanatory view of a rear leg and a lock mechanism.

FIG. 10 is an operation explanatory view showing a folded state of a sheet.

FIG. 11 is an operation explanatory view of the first conventional example.

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

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

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

FIG. 15 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 11 Stay 12 Frame 22 Front leg 38 Rear leg 40 Rear floor bracket with lock mechanism 42 Rotating shaft support 45 Mesh piece 50 Wire lever 57 Lock release operating device

 ──────────────────────────────────────────────────続 き The continuation of the front page F term (reference) 3B087 BD01 CB13

Claims (8)

[Claims] 1. A vehicle comprising: a seat including a seat cushion and a seat back disposed at a rear portion of the seat cushion; and a lower portion of the seat back provided with a rotation shaft support for tilting the seat back forward of the vehicle. When the seat back is tilted, the seat cushion is moved forward and downward of the vehicle, and at the same time, the seat back is folded on the seat cushion. In the folding seat of the vehicle, the upper end of the front leg is turned forward of the seat cushion. A stay for movably mounting and connecting the cushion frame of the seat cushion and the seat frame of the seat back is provided, one end of the stay is fixed to the rear of the cushion frame, and the other end of the stay can be rotated to the seat frame. At the lower part of the seat back frame near the pivot support. A lock mechanism for unlocking the lock mechanism is provided above the seatback, and a wire lever for unlocking the lock mechanism is unlocked by a wire lever that unlocks the lock mechanism. After unlocking the lock mechanism by rotating the wire lever by sliding the wire in the pulling direction by the operation of the lock release operation device, the front of the vehicle around the rotation shaft support portion A folded seat for a vehicle, wherein the seat back is folded by tilting the seat back in a direction. 2. A vehicle comprising: a seat comprising a seat cushion and a seat back disposed at a rear portion of the seat cushion; and a pivot supporting portion for tilting the seat back forward of the vehicle at a lower portion of the seat back; When the seat back is tilted, the seat cushion is moved forward and downward of the vehicle, and at the same time, the seat back is folded on the seat cushion. In the folding seat of the vehicle, the upper end of the front leg is turned forward of the seat cushion. A stay for movably mounting and connecting the cushion frame of the seat cushion and the seat frame of the seat back is provided, one end of the stay is fixed to the rear of the cushion frame, and the other end of the stay can be rotated to the seat frame. And a bracket is arranged inside the other end of the stay. A rear leg is disposed between the end and the bracket, a lock mechanism is disposed on the bracket disposed inside the other end of the stay, and a lock of the lock mechanism is provided above the seat back. An unlocking device for unlocking is provided, and the unlocking device and a wire lever for unlocking the lock mechanism are connected by a wire, and the wire is slid in a pulling direction by operating the unlocking device. And releasing the lock of the lock mechanism by rotating the wire lever, and then folding the seat back by tilting the seat back in the forward direction of the vehicle around the pivot shaft support. Sheet. 3. The folding seat according to claim 1, wherein a lower end of the front leg is rotatably mounted. 4. The folding seat for a vehicle according to claim 1, wherein the other end of the stay is disposed so as to project rearward from a rear end of the cushion frame. 5. A lock for locking the lock mechanism by providing a spring for urging the wire lever in a locking direction of the lock mechanism, and rotating the wire lever by operating the unlocking operation device against the spring. 5. The method according to claim 1, wherein
A folding seat for a vehicle according to claim 1. 6. A connecting portion for connecting the wire lever and the wire below the rotation shaft supporting portion for tilting the seat back, and the lock release operation device is disposed above the rotation shaft supporting portion. The folding seat for a vehicle according to any one of claims 1 to 5, characterized in that: 7. The folding seat according to claim 1, wherein the lock mechanism includes a meshing portion that meshes when locked, and the meshing portion is disposed around the rotation shaft support. 8. The stay according to claim 1, wherein the stay is disposed outside each of left and right seat frames of the seat back, and the lock mechanism is disposed inside the stay. A folding seat for a vehicle according to claim 1.