JP3081089B2 - Assembling structure of cushion 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 structure for assembling a cushion sheet.

[0002]

2. Description of the Related Art Japanese Patent Application No. 5-189300 of the prior application of the present invention.
In the specification, the rear end of a rear pivot arm whose front end moves up and down at the rear end of a fixed frame that is fixed to a vehicle body frame or that is attached so as to be movable in any direction. The front end of the pivot arm is pivotally mounted near the rear end of the side frame on the cushion frame side, and the lower end of the front inclined arm is pivotally mounted near the front end of the side frame. The upper end of the front inclined arm is pivotally supported on the front end of the fixed frame by a shaft, and the rear dial is rotated by an operation dial to adjust the rear side of the cushion frame up and down. .

[0003]

In the prior application, the operation dial may be rotated more than necessary to cause a mechanical lock. In the assembling work, the lower end of the front inclined arm is axially fixed near the front end of the side frame, and then the setup is performed to pivotally support the upper end of the front inclined arm at the front end of the fixed frame. There can drop Ri hanging inverted, it takes time and effort in assembling work.

[0004]

An object of the present invention is to make assembly easy and prevent operation from being disabled.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a front pivot arm 9 and a rear pivot arm on a fixed frame 16 which is fixed to a vehicle body or mounted to be movable in any direction. Cushion sheet 2 through arm 11
The front pivot arm 9 has its both ends pivotally attached to the fixed frame 16 and the cushion frame 3 side, respectively. An engaging portion 37 protruding toward the cushion frame 3 is provided on a part of the front rotation arm 9 other than the respective shaft attachment portions of the frames 3 and 16, and the engagement portion 37 is provided on the front rotation arm. 9 and an assembly structure of a cushion sheet engaged with an engagement recess 38 formed on the cushion frame 3 side so as to regulate the rotation of the cushion frame 3, and the front rotation arm 9 is attached to the fixed frame 16.
The shaft 17 to be attached is mounted on the fixed frame 16 as a pivot bolt by assembling a cushion sheet welded and fixed, and the engaging recess 38 is set to a size of a rotation range of the front inclined arm 9. This is a configuration with attachment.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. (This embodiment has a substantially left-right symmetrical configuration, parts of the symmetrical configuration are denoted by the same reference numerals, and different parts are denoted by different reference numerals.) Reference numeral 1 denotes a vehicle seat, 2 denotes a cushion seat of the vehicle seat 1, and 3 denotes a cushion frame of the cushion seat 2.

The cushion frame 3 is formed in a box shape having an open upper surface, and the bottom plate 4 of the cushion frame 3 is formed lower on the rear side so that the lower part of the buttocks of the occupant is lower. A side wall 5 that stands upward is integrally connected to the side, but the side wall 5 is inclined so as to be higher toward the outside, and has a shape that facilitates so-called press working.

Reference numeral 7 denotes side frames fixed to the left and right sides of the cushion frame 3, which reinforce the strength of the cushion frame 3. The side frames are long in the front-rear direction, and are formed by bending into an L-shaped shape which is substantially perpendicular when viewed from the front. I do. A through hole 8 is formed in a front portion of the side frame 7, and a lower end 50 of a front inclined rotation arm 9 is brought into contact with an outer surface of the through hole 8 to be rotatably mounted on a shaft 10. Also, the side frame 7
On the rear side, a rear rotating arm 11 is mounted. The rear rotating arm 11 is formed in an inverted L-shape, and a front end 12 thereof is rotatably mounted on the side frame 7 by a shaft 13.

Reference numeral 16 denotes a fixed frame, which may be fixed to the vehicle body frame or may be mounted so as to be movable in any direction.
In this embodiment, the fixed frame 16 is fixed to the upper rail of a so-called slide rail. The fixed frame 16 moves forward and backward with respect to the vehicle body, but is fixed to the side frame 7 that moves up and down. It is expressed.

The upper end 51 of the front inclined rotating arm 9 is pivotally attached to the front portion of the fixed frame 16 by the shaft 17, and the rear end 52 of the rear rotating arm 11 is fixed to the rear of the fixed frame 16 by the shaft 18. The arm 9 is mounted on the shaft,
A link mechanism 20 is constituted by the rear pivot arm 11 and the side frame 7 (cushion frame 3). When the rear pivot arm 11 is pivoted as described later, the front tilt pivot arm 9 and the rear Both of the side rotation arms 11 rotate around the shafts 17 and 18 respectively,
Thereby, the side frame 7 (cushion frame 3)
Moves with respect to the fixed frame 16.

When the front end of the cushion sheet 2 is moved back and forth without moving up and down, and the rear portion of the cushion sheet 2 is adjusted up and down without moving back and forth, the occupant can reduce the distance to an operating member such as a steering wheel. Without changing, the height of the field of view can be adjusted by raising and lowering the buttocks of the seated person, and the cushion seat 2 for the thighs can be adjusted.
Can maintain a good supporting force, and the sitting feeling can be improved. That is, when the entire cushion seat 2 is raised to raise not only the rear part but also the front end of the seat 2 below the thigh of the seated person, the thigh is compressed, and conversely, the entire seat 2 is If the height is lowered, the feeling of support of the thighs decreases, and in each case, the degree of fatigue increases. Therefore, if the front end of the cushion sheet 2 is not moved up and down and the rear part of the cushion sheet 2 is moved up and down, the sitting comfort is impaired. The visual field can be adjusted well without any problem.

Therefore, the lower end 50 of the front tilting rotation arm 9 is
The pivot arm 9 is pivotally attached to the fixed frame 16 so that the upper end 51 of the pivot arm 9 is obliquely upward from the front end of the side frame 7 by a shaft 10. The front end 12 of the side frame 3 is pivotally mounted on the shaft 13 at a position slightly forward of the rear end of the side frame 3, and the rear end 52 of the rear rotating arm 11 is mounted on the rear end of the fixed frame 16 by the shaft 1.
The shaft is attached by 8.

That is, the rear-side rotating arm 11 has a rear end portion 52 with the rear portion of the cushion seat 2 being the lowest.
The front end 12 (the shaft 13) is rotated upward from a position slightly lower than the rear end 52 (the shaft 18) on the front side with respect to the (shaft 18) and the rear end 52 (the shaft 18). It is arranged so as to move approximately linearly up and down with respect to an end 52 (axis 18), and the front inclined rotation arm 9 is configured such that the front end 12 (axis 13) of the rear rotation arm 11 is approximately linear. Even if it moves vertically, it moves slightly backward because it is an arc movement centered on the shaft 18, so that the lower end 50 (shaft 10) moves upward and rearward. Are arranged at an angle so that the lower end 50 (axis 10) is on the lower side and the rear side with respect to the upper end 51 (axis 17).

Thus, the lower end 5 of each rear pivot arm 11
The rear end of a pair of right and left rods 22 in the front-rear direction is
The front end of one rod 22 is on the sector gear 24 and the front end of the other rod 22 is an arm 35
And the sector gear 24 and the arm 35
Are fixed to both sides of the shaft 25 in the left-right direction, and both left and right ends of the shaft 25 are rotatably mounted on the side frame 7.

A gear 26 is provided on the side frame 7 near the shaft 25 so as to mesh with the sector gear 24, and the gear 26 is fixed to an output shaft 28 of a position fixing device 27. The position fixing device 27 has a known configuration, and an operation dial 29 is attached to the input shaft 31 of the position fixing device 27.
The operation dial 29 can be rotated in any direction,
When rotated, the gear 26 rotates. When the sector gear 24 attempts to rotate the gear 26, a mechanism (brake mechanism) for stopping the rotation is incorporated. Accordingly, in a state where the hand is released from the operation dial 29, the sector gear 24 does not rotate, whereby the rod 22 restricts the rotation of the rear rotation arm 11 to lock the link mechanism 20, and the cushion seat 2 Is held in place.
Note that a motor may be used instead of the position fixing device 27.

Thus, the lower end 5 of the front tilting rotation arm 9
An engaging portion 37 protruding toward the side frame 7 is formed at 0, while an engaging recess 38 is formed at the side frame 7, and the engaging portion 37 is inserted into and engaged with the engaging recess 38. The engagement recess 38 is formed in an arc shape centered on the shaft 10, and the inner peripheral edge of the engagement recess 38 serves as an engagement surface, and the engagement portion 37 comes into contact with the engagement recess 37 so that the front inclined rotation arm is formed. 9 is restricted.

The sector gear 24 is provided in a recess 40 formed in the side frame 7, and a projection 41 is formed on a front inner peripheral surface 45 of the recess 40. The projection 41 is formed by a rear portion of the cushion seat 2. When the uppermost position is reached, the rotation is regulated such that the sector gear 24 comes into contact with the sector gear 24.

A window is provided below the rear pivot arm 11 at the rear of the side frame 7 to prevent interference with the lower portion of the rear pivot arm 11 when the rear portion of the cushion sheet 2 is moved downward. A part 46 is formed. The inner peripheral surface 47 of the window 46 is configured such that when the rear portion of the cushion seat 2 is at the lowermost position, the lower end 54 of the rear pivot arm 11 comes into contact with the rear surface of the cushion seat 2. Is regulated. 42 is an arm fixed to the shaft 25, 43 is a mounting plate,
4 is a spring.

[0019]

Next, the operation will be described. The front end 12 of the rear turning arm 11 is pivotally attached to the rear portion of the left and right side frames 7 by the shaft 13, and the rod 2 is attached to the lower end 54 of the rear turning arm 11.
2 Attach the rear parts respectively. Left and right side frames 7
, The two ends of the shaft 25 to which the sector gear 24 and the arm 35 are attached are axially mounted, and the sector gear 24 and the arm 3
5 is provided with a front part of the rod 22. The position fixing device 27 is fixed to the side frame 7 such that the gear 26 attached to the output shaft 28 of the position fixing device 27 meshes with the sector gear 24. The lower end 50 of the front inclined rotation arm 9 is brought into contact with the front through-hole 8 of the left and right side frames 7 and is axially mounted on the shaft 10. Next, the left and right side frames 7 in this state are fixed to the cushion frame 3.

In the cushion frame 3, the rear end portions 52 of the left and right rear rotating arms 11 are respectively mounted on the left and right fixed frames 16 by the shafts 18, and the upper ends 51 of the left and right front inclined rotating arms 9 are provided. Are mounted on the fixed frame 16 by the shafts 17 to complete the mounting.

In this case, even before the side frame 7 is mounted on the fixed frame 16, the sector gear 24 is not rotated by the position fixing device 27, so that the sector gear 2 is not rotated.
Rear pivot arm 11 connected to rod 4 via rod 22
Does not rotate, however, the lower end 5 of the front tilt rotation arm 9
Since 0 is freely rotatable about the axis 10, the upper end 51 of the front tilt-rotating arm 9 turns freely and the mounting position is not specified. An engagement portion 37 protruding toward the frame 7 is formed,
The engagement portion 37 is formed by an engagement recess 38 formed in the side frame 7.
And the engaging recess 38 is formed in an arc-shaped long hole centered on the shaft 10, so that when the upper end 51 of the front-side inclined rotating arm 9 attempts to rotate downward, the engaging portion 37 is engaged. By contacting the inner peripheral surface of the joint recess 38, the rotation range of the front-side inclined rotation arm 9 is restricted, and further downward rotation of the upper end 51 of the front-side inclined rotation arm 9 is restricted.

Accordingly, since the engaging portion 37 is in contact with the inner peripheral surface of the engaging concave portion 38 to restrict the downward rotation of the upper end 51 of the front inclined rotating arm 9, the front end portion of the fixed frame 16 is When the upper end of the inclined arm 9 is pivotally supported, the upper end 51 of the front inclined arm 9 is not inverted, so that the assembling work is facilitated.

In this case, when the engaging portion 37 comes into contact with the inner peripheral surface of the engaging concave portion 38 and the downward rotation of the front tilting rotation arm 9 is restricted, the rear portion of the cushion sheet 2 moves upward. In this state, the rear end portion 52 of the rear turning arm 11 is fixed with the operation dial 29 being rotated so that the rear portion of the rear turning arm 11 is located at the uppermost position of the cushion seat 2. The upper end 51 of the front-side inclined rotation arm 9 is attached to the fixed frame 16 by the shaft 1.
When the shaft 7 is attached, the positional relationship between the components is easily adjusted, and the components can be easily assembled.

When the user sits on the vehicle seat 1 and turns the operation dial 29, the output shaft 28 of the operation dial 29 is turned on.
Rotates to rotate the gear 26, which rotates the sector gear 24 about the axis 25, and the sector gear 24 pulls the rod 22 forward. The rod 22 rotates the rear rotating arm 11 clockwise about the axis 18 in the figure. The rear-side rotating arm 11 turns the front end 12 forward with respect to the rear end 52 and upwards from a position slightly lower than the rear end 52 in a state where the rear of the cushion sheet 2 is lowest. The rear pivot arm 11
When the is rotated, the front end portion 12 moves upward approximately linearly with respect to the rear end portion 52, and the rear portion of the cushion sheet 2 is largely moved upward to raise the viewpoint.

When the operation dial 29 is rotated in the opposite direction, the rear portion of the cushion sheet 2 moves downward, and the front end of the cushion sheet 2 moves forward without moving up and down.

Therefore, the rear portion of the cushion sheet 2 moves up and down without moving back and forth, so that the distance to the operation member such as the steering wheel does not change, and the operability is not affected.

Further, since the sector gear 24 is urged by the spring 44, the rotation of the operation dial 29 when moving the rear portion of the cushion sheet 2 upward is reduced.

Thus, the link mechanism 20 is formed by the rear rotating arm 11, the side frame 7, and the front inclined rotating arm 9.
, The front end 12 of the rear rotating arm 11
The upper frame moves the side frame 7, thereby moving the lower end 50 of the front-side tilting rotation arm 9, and rotating the front-side tilting rotation arm 9.

Since the front-side tilting rotation arm 9 is provided obliquely, the vertical width is smaller than the rotation of the rear-side rotation arm 11. Without moving the front end of the seat 2 upward,
Adjustment can be made to narrow the upward movement range toward the front. Therefore, even if the rear part of the cushion sheet 2 is raised, the front side is not so high as compared with the case where the whole cushion sheet 2 is raised, so that the seated person does not increase the feeling of pressure on the thigh.

However, since the front tilting rotation arm 9 is provided obliquely and has a longer moving distance in the front-rear direction than the rotation of the rear rotation arm 11, the lower end 5 of the front tilting rotation arm 9 is provided.
0 rotates rearward.

That is, the front end 12 of the rear rotating arm 11
Since the movement trajectory of the (axis 13) is an arc movement even though it is an approximate linear up-down movement, the front end portion 12 moves slightly backward, and the side frame 7 moves the lower end 50 of the front-side inclined rotation arm 9 to the lower end 50. Since it acts so as to be pulled rearward, the lower end 50 of the front side tilting rotation arm 9 rotates upward and approaches the rear side.

Therefore, the front end moves backward with the upward movement of the rear part of the cushion seat 2, so that the feeling of pressure on the thigh is further reduced. In particular, in the case of a low-height occupant who often uses the rear portion of the occupant, the position of the knee is on the backrest seat side as compared with the occupant having a high height.
When the front end moves backward with the upward movement of the rear part, the distance from the backrest seat to the front end of the cushion sheet 2 is shortened to prevent the thigh and calf from being pressed,
The occupant's back is in close contact with the backrest seat, so that not only the optimal driving posture is achieved, but also the effect of improving the sitting feeling is great.

When the operation dial 29 is rotated in the opposite direction to lower the rear portion of the cushion sheet 2,
In the cushion sheet 2 as a whole, the front end of the cushion sheet 2 moves to the front side without substantially moving up and down.

Accordingly, the viewpoint is lowered, and even if the rear part of the cushion sheet 2 is lowered, the front side is not so much lower than the whole cushion sheet 2 is lowered, so that the seated person's feeling of supporting the thigh is reduced. Do not let. In particular, in the case of a tall occupant who often lowers the viewpoint, the knee position is on the front side of the backrest seat as compared to the occupant with a short stature,
When the rear part of the cushion sheet 2 is moved down, the front end part moves forward with the movement, thereby increasing the distance from the backrest sheet to the front end part of the cushion sheet 2 and better supporting the thigh. The effect of improving the seating feeling is great.

Since the engagement recess 38 has a size corresponding to the rotation range of the front inclined arm 9, when the rear portion of the cushion seat 2 is at the uppermost position, the engagement recess 3 is formed.
7 comes into contact with the upper inner peripheral surface of the engagement recess 38, and when the rear portion of the cushion sheet 2 is at the lowermost position, the engagement portion 37 comes into contact with the lower inner peripheral surface of the engagement recess 38. It also functions as a stopper for the front rotation arm 9.

The sector gear 24 is provided in a recess 40 formed in the side frame 7, and a projection 41 is formed on a front inner peripheral surface 45 of the recess 40, and the projection 41 is provided at a rear portion of the cushion seat 2. Is the uppermost position,
Since it protrudes to a position where it comes into contact with the sector gear 24, the rotation of the sector gear 24 when the rear portion of the cushion seat 2 is operated upward is restricted, thereby preventing an inoperative state due to excessive rotation. .

A window 46 is formed at the rear of the side frame 7 below the rear turning arm 11, and when the rear of the cushion seat 2 is at the lowest position, the rear turning is performed. Since the lower end 54 of the arm 11 is configured to contact the inner peripheral surface 47 of the window 46, excessive downward rotation of the rear rotation arm 11 is restricted.

[0038]

According to the present invention, the cushion seat 2 is fixed to the vehicle body via the front turning arm 9 and the rear turning arm 11 on the fixed frame 16 which is fixed to the vehicle body or mounted so as to be movable in any direction. The front pivot arm 9 has its both ends pivotally attached to the fixed frame 16 and the cushion frame 3 side, respectively. An engaging portion 37 protruding toward the cushion frame 3 is provided on a part of the front rotation arm 9 other than the respective shaft attachment portions of the frames 3 and 16, and the engagement portion 37 is provided on the front rotation arm. Since the cushion sheet is engaged with the engaging concave portion 38 formed on the cushion frame 3 side so as to restrict the rotation of the cushion frame 9, the upper side of the front inclined rotation arm 9 is assembled at the time of assembly. Even if the 51 is to rotate downward, the downward rotation of the upper end 51 is restricted, so that not only the assembling work can be easily performed, but also the mechanical lock is generated by restricting the rotation of the front-side inclined rotation arm 9. Can be prevented and can be operated accurately. Also, the present invention
Attach the front rotating arm 9 to the fixed frame 16
Since the shaft 17 is assembled with the cushion sheet welded and fixed to the fixed frame 16 as a pivot bolt, it is possible to prevent the loosening from occurring. Further, according to the present invention, since the engagement recess 38 is configured to assemble a cushion sheet having a size corresponding to a rotation range of the front inclined arm 9, the engagement recess 38 has a stopper function for a vertical operation of a rear portion of the cushion sheet 2.

[Brief description of the drawings]

FIG. 1 is a perspective view of an assembled state.

FIG. 2 is a side view.

FIG. 3 is a plan view of a main part.

FIG. 4 is a sectional view of a main part.

FIG. 5 is an arm mounting state diagram.

FIG. 6 is a sectional view of the same.

FIG. 7 is an operation state diagram.

FIG. 8 is a schematic diagram showing an operation state of a link.

FIG. 9 is an operation state diagram.

FIG. 10 is a state diagram when assembled.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Vehicle seat, 2 ... Cushion seat, 3 ... Cushion frame, 4 ... Bottom plate, 5 ... Side wall, 7 ... Side frame, 8 ... Through hole, 9 ... Front-side inclined rotation arm, 10 ... Axle mounting,
11: Rear rotating arm, 12: Middle part, 13: Axle attachment, 1
6 ... fixed frame, 17 ... shaft mounted, 18 ... shaft mounted, 20 ... link mechanism, 22 ... rod, 23 ... shaft, 24 ... sector gear, 25 ... shaft, 26 ... gear, 27 ... position fixing device, 28
... output shaft, 29 ... operation dial, 35 ... arm, 37 ...
Engagement projection, 38: long hole, 40: recess, 41: projection, 42
... Arm, 43 ... Mounting plate, 44 ... Spring, 45 ... Front inner peripheral surface 45, 46 ... Window, 47 ... Inner peripheral surface, 50 ... One end, 51
... the other end, 52 ... rear end, 54 ... lower end.

Claims (3)

(57) [Claims] 1. A fixed frame 1 fixed to a vehicle body or mounted to be movable in any direction.
6 in which the cushion frame 3 is attached via a front rotation arm 9 and a rear rotation arm 11 so that the rear end of the cushion sheet 2 can be adjusted vertically. Is fixed frame 1 at both ends
6 and the cushion frame 3 side, and engaging portions protruding toward the cushion frame 3 side on a part of the front rotation arm 9 other than the respective shaft mounting portions of the respective frames 3 and 16. 37. A structure in which a cushion sheet is provided, wherein the engagement portion 37 is engaged with an engagement recess 38 formed on the cushion frame 3 side so as to restrict the rotation of the front rotation arm 9. 2. The front rotation arm according to claim 1, wherein
Shaft 17 mounting the 9 to the fixed frame 16, the solid
Assembling configuration of a cushion sheet welded and fixed to a fixed frame 16 as a pivot bolt. 3. The mounting structure of a cushion seat according to claim 1, wherein the engaging concave portion has a size corresponding to a rotation range of the front inclined arm.