JPH11278124A - Flattened seat structure of automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flattened seat structure of automobile needing no increase of a plate thickness of a seat frame. SOLUTION: Even if a load is applied to a seat frame 7 and the seat frame 7 attempts to deform, a deformation prevention member 9 is engaged with a fixed rail 1 to prevent its deformation, thereby needing no increase of a plate thickness of the seat frame 7. Accordingly, it is possible to reduce a weight of a car body and improve the press molding property of the seat frame 7. Moreover, the deformation prevention member 9 does not become resistance against sliding because it is not in contact with the fixed rail 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat seat structure for an automobile.

[0002]

2. Description of the Related Art In general, an automobile seat has a flat structure in which a seat cushion and a seat back can be made substantially horizontal at substantially the same height in order to take a rest or sleep, or to make wide use of a vehicle interior. There are things that are.

As this kind of flat structure, for example,
As known from Japanese Utility Model Publication No. 7-27239,
By rotating the seat cushion forward around the front end fulcrum and in a substantially horizontal inverted state, and rotating the seat back forward around the lower end fulcrum and in a substantially horizontal leaning state, The back surface of the seat cushion and the back surface of the seat back are configured to be flat surfaces having substantially the same height.

However, in such a structure, when the seat cushion is turned forward around the fulcrum of the front end thereof, the amount of protrusion of the seat cushion forward becomes large, and there is no space in front of the seat. Is difficult to apply.

In order to suppress the amount of forward projection of the seat cushion when the seat cushion is flattened, a structure in which the seat cushion and the seat back are slid backward and then flattened. Specifically, a seat cushion and a seat back are supported by a seat frame, and rollers are provided at both front and rear ends of the seat frame so as to protrude outward in the vehicle width direction. A structure in which the seat cushion and the seat back are slid from the seated position to the rear flattened position by slidably engaging is considered.

[0006]

However, in such a structure in which the seat cushion and the seat back are supported by the seat frame, the vertical width of the seat frame is increased in order to avoid interference with the seat back falling forward. Can not secure. Therefore, it is necessary to sufficiently increase the thickness of the seat frame in order to compensate for the decrease in the strength of the seat frame.
Accordingly, the weight of the vehicle body increases, and the press formability of the seat frame also deteriorates.

The present invention has been made by paying attention to such a conventional technique, and provides a flattened seat structure of an automobile which does not require an increase in the thickness of a seat frame.

[0008]

According to the first aspect of the present invention,
The seat cushion is pivoted forward about the front end fulcrum to be in a substantially horizontal inverted state, and the seat back is pivoted forward about the lower end fulcrum to be in a substantially horizontal leaning state, so that the seat cushion is rotated. A flattened seat structure for an automobile in which a back surface and a back surface of a seat back have substantially the same height, wherein the seat cushion and the seat back are supported by a seat frame, and both front and rear ends of the seat frame are provided in the vehicle width direction. An outwardly protruding roller is provided and the roller is slidably engaged with a fixed rail fixed to the vehicle body floor so that the seat cushion and the seat back can be slid from the sitting position to the rear flattened position. In addition, between the front and rear rollers of the seat frame, a small vertical space is provided between the front and rear rollers and located within the fixed rail. Te is provided with a deformation preventing member which has a non-contact state.

According to the first aspect of the present invention, even if a load is applied to the seat frame to deform the seat frame, the deformation preventing member is engaged with the fixed rail to prevent the deformation. There is no need to increase the thickness of the seat frame. Therefore, the weight of the vehicle body can be reduced, and the press formability of the seat frame can be improved. Further, since the deformation preventing member is not in contact with the fixed rail, it does not become a resistance when sliding.

According to the second aspect of the present invention, the deformation preventing member is provided at an intermediate position between the front and rear rollers.

According to the second aspect of the present invention, since the deformation preventing member is provided at an intermediate position between the front and rear rollers, the deformation of the seat frame can be effectively prevented.

According to a third aspect of the present invention, the deformation preventing member has a roller shape which is attached by caulking to the seat frame.

According to the third aspect of the present invention, since the deformation preventing member has a roller shape which is attached by caulking to the seat frame, it is not necessary to use a separate member to mount the deformation preventing member. The number of parts can be reduced.

According to a fourth aspect of the present invention, the deformation preventing member has a hat-shaped panel shape to be attached to the seat frame by welding.

According to the fourth aspect of the present invention, since the deformation preventing member has a hat-shaped cross-sectional panel shape which can be attached to the seat frame by welding, it is not necessary to form a hole in the seat frame. The frame can be easily formed.

[0016]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 to FIG. 5 are views showing a first embodiment of the present invention. This embodiment shows a flattened structure according to a third row seat (third seat) of a wagon vehicle. Reference numeral 1 denotes a fixed rail, and front and rear brackets 2
To the vehicle body floor 3. The fixed rails 1 are provided in a pair on the left and right sides, and each have a C-shaped cross section having an opening 4 along the longitudinal direction on the inner surface.

On the other hand, the seat cushion 5 and the seat back 6 are supported by a seat frame 7. The thickness of the seat frame 7 is not so large in consideration of the weight of the vehicle body. Rollers 8 projecting outward in the vehicle width direction are provided at front and rear ends of the seat frame 7, and the rollers 8 are engaged with the fixed rail 1 so as to be slidable back and forth. Therefore, the seat cushion 5 and the seat back 6 can be slid together with the seat frame 7 from the seating position to the rear flattened position. A lock mechanism (not shown) is provided between the seat frame 7 and the fixed rail 1 so that the seat frame 7 can be locked at a seating position and a flattened position.

A roller-shaped deformation preventing member 9 is attached to the seat frame 7 at an intermediate position between the front and rear rollers 8. This deformation preventing member 9
It is fixed to the hole 22 of the seat frame 7 by the caulking part 23. Since the attachment is performed by the caulking portion 23, no additional members are required, and the number of components can be reduced.

The tip end of the deformation preventing member 9 is located inside the fixed rail 1, but is in a non-contact state with the fixed rail 1 via minute intervals d ₁ and d ₂ . That is, in the up-down direction, the minute interval d _{1 is set} between the opening 4 and the edge thereof.
Is provided, and a minute interval d ₂ is provided between the edge of the opening 4 and the flange 24 at the front end in the vehicle width direction. Therefore, when the seat frame 7 is slid back and forth, the deformation preventing member 9 does not become a resistance.

Next, a structure for supporting the seat cushion 5 and the seat back 6 on the seat frame 7 will be described. A front end fulcrum P1 is set at the front end of the seat frame 7, a lower end fulcrum P2 is set at the rear end, and a U-shaped striker 10 is fixed near the front and rear middle (see FIG. 3). .

The front end fulcrum P of the seat frame 7
1, the front end of the seat cushion 5 is rotatably supported. On the rear end side surface of the seat cushion 5,
The hook 11 that engages with the striker 10 is a fulcrum 11a.
Is provided so as to be rotatable around the center. This hook 11
Is biased in the engaging direction by a spring 12, and the engaged state with the striker 10 is released by turning the hand in the anti-engaging direction by hand. A substantially U-shaped large leg member 13 that covers the rear end of the seat cushion 5 is rotatably provided at the rear end.

At the lower end fulcrum P2 of the seat frame 7,
Device arm 14 fixed to the side of seat back 6
The seat back 6 is configured to rotate back and forth about the lower end fulcrum P2. A pin 15 is provided on the side of the upper end of the seat back 6 (see FIG. 2). Below the lower end fulcrum P2,
A stopper 16 that engages with the lower end of the device arm 14 to prevent rotation is provided rotatably about a fulcrum 16a. The stopper 16 is urged in a direction of engagement by a spring (not shown), and a notch 17 is formed at a lower edge.

Below the stopper 16, a rotary plate 18 that rotates about a fulcrum 18a is provided. A spring 19 for biasing the rotating plate 18 in a counterclockwise direction is provided at a lower end of the rotating plate 18.
At the upper end, a pin 20 corresponding to the notch 17 of the stopper 16 is formed. The fulcrum 18 of the rotating plate 18
a, the operating lever 2 integrated with the rotating plate 18 is provided.
When the operating lever 21 is operated in the lifting direction, the rotating plate 18 is rotated clockwise against the spring 19, and the pin 20 is notched.
7, the stopper 16 is pushed down,
The engagement with the device arm 14 is released.

Next, an operation method for flattening the sheet will be described. First, a lock mechanism (not shown) between the seat frame 7 and the fixed rail 1 is released, and the seat frame 7 is slid rearward together with the seat cushion 5 and the seat back 6. When the seat frame 7 is retracted to the flattened position, the seat frame 7 is locked by a lock mechanism (not shown).

Thereafter, the hook 11 is rotated to release the engagement with the striker 10, and the entire seat cushion 5 is pivoted forward around the front end fulcrum P1 while raising the entire seat cushion 5, so that the back surface 5a is turned up. Invert state. At this time, the leg member 13 is rotated to an upright state, and the substantially horizontal state of the seat cushion 5 is maintained.

Next, the operation lever 21 is operated to lift, and the rotating plate 18 is rotated, and the pin 20 is rotated.
Is engaged in the notch 17 to lower the stopper 16 and release the engagement state with the device arm 14.
Then, the seat back 6 is rotated forward about the lower end fulcrum P2 to bring the seat back 6 into a substantially horizontal forward leaning state. When the seat back 6 is in a substantially horizontal state, the pin 15 at the upper end is
Is maintained by engaging the upper edge of the The rear surface 6a of the seat back 6 in the substantially horizontal state has the same height as the rear surface 5a of the seat cushion 5, and the rear surface 6a and the rear surface 5a
a and a flat continuous surface is formed.

Further, in this embodiment, the seat cushion 5 and the seat back 6 are slid once backward from the seating position and then rotated forward, so that the seat cushion 5 and the seat back 5 are relatively moved forward. The protrusion amount is small, and the present invention can be applied to an automobile having no space in front of the seat.

Further, even if a load is applied to the seat frame 7 to deform the seat frame 7, the deformation preventing member 9 is engaged with the fixed rail 1 to prevent the deformation. That is, the deformation preventing member 9 hits the edge of the opening 4 in the up-down direction, and the front end flange 24 hits the edge of the opening 4 from the inside in the vehicle width direction, so that the deformation of the seat frame 7 is prevented. Therefore, as described above, the thickness of the seat frame 7 is not so large, but there is no problem in strength. And in this embodiment,
Since the deformation preventing member 9 is provided at an intermediate position between the front and rear rollers 8, the deformation of the seat frame 7 can be effectively prevented.

FIG. 6 is a diagram showing a second embodiment of the present invention. In this embodiment, the deformation preventing member 25 has a panel shape obtained by simply bending a strip-shaped panel into a hat-shaped cross section, and the deformation preventing member 25 is attached to the seat frame 26 by welding. According to this embodiment, since there is no need to perform hole processing on the seat frame 26, the seat frame 26 can be easily formed.

[0031]

According to the first aspect of the present invention, even if a load is applied to the seat frame and the seat frame attempts to deform, the deformation preventing member is engaged with the fixed rail to prevent the deformation. Therefore, there is no need to increase the thickness of the seat frame. Therefore, the weight of the vehicle body can be reduced, and the press formability of the seat frame can be improved. Also, since the deformation preventing member is in a non-contact state with the fixed rail,
There is no resistance when sliding.

According to the second aspect of the present invention, since the deformation preventing member is provided at an intermediate position between the front and rear rollers, the deformation of the seat frame can be effectively prevented.

According to the third aspect of the present invention, since the deformation preventing member has a roller shape which is attached by caulking to the seat frame, it is not necessary to use a separate member for mounting the deformation preventing member. The number of parts can be reduced.

According to the fourth aspect of the present invention, since the deformation preventing member has a hat-shaped panel shape which can be attached to the seat frame by welding, it is not necessary to form a hole in the seat frame. The frame can be easily formed.

[Brief description of the drawings]

FIG. 1 is a side view showing a normal use state of a seat according to a first embodiment of the present invention.

FIG. 2 is a side view showing a flat state of a sheet.

FIG. 3 is a sectional view taken along the line SA-SA shown in FIG.

FIG. 4 is a sectional view taken along the line SB-SB shown in FIG. 1;

FIG. 5 is a sectional view taken along the line SC-SC shown in FIG.

FIG. 6 is a sectional view corresponding to FIG. 5, showing a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixed rail 3 Body floor 5 Seat cushion 5a Back 6 Seat back 6a Back 7, 26 Seat frame 8 Roller 9, 25 Deformation prevention member P1 Front end fulcrum P2 Lower end fulcrum

Claims (4)

[Claims] 1. The seat cushion pivots forward about a front end fulcrum to be in a substantially horizontal inverted state, and the seat back pivots forward about a lower end fulcrum to be in a substantially horizontal forward leaning state. The rear surface of the seat cushion and the rear surface of the seat back have a flattened seat structure of an automobile having substantially the same height, and the seat cushion and the seat back are supported by a seat frame, and the front and rear of the seat frame are provided. Rollers projecting outward in the vehicle width direction are provided at both ends, and the rollers are slidably engaged with a fixed rail fixed to the vehicle body floor so that the seat cushion and the seat back can be flattened from the seating position to the rear. And between the front and rear rollers of the seat frame, located within the fixed rail and slightly relative to the fixed rail. Flattening sheet structure for an automobile, characterized in that a deformation prevention member that has a non-contact state through the vertical spacing. 2. The flattened seat structure according to claim 1, wherein the deformation preventing member is provided at an intermediate position between the front and rear rollers. 3. The flattening structure of an automobile according to claim 1, wherein the deformation preventing member has a shape of a roller which is attached by caulking to a seat frame. Seat structure. 4. The flattened seat structure for an automobile according to claim 1, wherein the deformation preventing member has a hat-shaped panel shape which is attached to the seat frame by welding. Flat sheet structure.