JP2000177455A - Changing device for position and attitude of automobile seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate an operation for changing a seating position onto a seat and an operation for changing an attitude of the seat into 'a housing attitude'. SOLUTION: A support means 7 through which a seat body 6 is supported on a floor panel 2 has front and hind legs 13, 14 extending downward from a lower surface side of the seat body 6; front and back upper pivotal supporters 15, 16 through which the seat body 6 pivotally supports respective upper end parts of the front and hind legs 13, 14 to allow free back-and-forth turning of the front and hind legs 13, 14; front and back lower pivotal supporters 17, 19 through which the floor panel 2 pivotally supports respective lower end parts of the front and hind legs 13, 14 to allow the free back-and-forth turning of the front and hind legs 13, 14; and a energizing means 31 for energizing the seat body 6 so as to move the seat body 6 toward a halfway position in the back-and-forth direction of the seat body 6 when the seat body 6 approaches to the foremost position or the backmost position from the halfway position within a back-and-forth movable range wherein the seat body 6 moves back and forth according to the back-and-forth turning of the front and hind legs 13, 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compact seat by changing the seating position of a seat provided on a floor panel of a vehicle body back and forth, and rotating the seat forward and upward from a seatable posture. The present invention relates to a device for changing a position and a posture of an automobile seat which can be changed to a storage posture.

[0002]

2. Description of the Related Art Conventionally, automobile seats have been disclosed in Japanese Patent Application Laid-Open
There is one disclosed in Japanese Patent No. 67186.

According to the above publication, the seat includes a seat body located above a floor panel of a vehicle body, and support means for supporting the seat body on the floor panel. It has been.

In the above arrangement, recently, the support means extends before and below the lower surface of the seat body, and rear legs, and each of the front and rear legs so that the front and rear legs can be freely rotated back and forth. Before pivoting the upper end to the seat body, the rear upper pivotal support, and before and after pivoting the lower end to the floor panel so that the front and rear legs can be rotated back and forth, There has been proposed a device provided with a support and rotation preventing means for arbitrarily preventing the rotation of the front and rear legs.

According to the seat having the above structure,
If the rear leg is rotated in the front-rear direction about the rear lower support, and the seat body and the front, the rear leg are rotated relatively about the rear upper support, If the seat body can be moved back and forth, and the rotation is prevented by the rotation preventing means, the seat body can be held at a desired position, thereby matching the physique and preference of the seated person Thus, the seating position on the seat can be changed back and forth.

In the above structure, the support means may include a locking member for locking the lower end of the rear leg to be detachable from the floor panel, and the lower end of the rear leg to the lower end of the front leg. A connecting device for connecting the seat, the seat can be changed to the storage position by releasing the locking of the rear leg by the locking device and rotating the seat forward and upward around the front lower pivot support. It has also been proposed to make this happen.

When the seat is placed in the storage position, the seat has a compact, vertically long shape in the front-rear direction, and the riding space and working space of the passenger compartment behind the seat are widened. .

On the other hand, if the seat in the storage position is rotated rearward and downward about the front lower pivot support as opposed to the above, the lower end of the rear leg is moved to the floor panel by the locking device. The seat is automatically locked, and the seat is returned to the original seatable position described above.

[0009] In the above case, when the seat is pivoted backward and downward,
When the lower end of the rotating rear leg is to be locked to the floor panel by the locking device, the lower end of the rear leg is connected to the lower end of the front leg. The connector is positioned at a predetermined position with respect to the locking tool, so that the locking by the locking tool is performed smoothly.

[0010]

However, the above-mentioned prior art has the following problems.

First, when the seat body is moved back and forth by rotating the front and rear legs back and forth about the front and rear pivot supports, the locus of movement of the seat body in a side view is as follows. A convex arc protruding upward is drawn, and when the front and rear legs extend in a substantially vertical direction, they are positioned at the top of the convex arc.

In the above case, in order to change the seating position on the seat, for example, from the state where the seat body is located at the last part (or the foremost part) in the front-back movable range, the seat body is moved in the front-rear direction. When trying to move forward (or backward) toward the middle part, since the movement trajectory of the seat body is a convex arc as described above, the operation of once lifting the seat body forward and upward (or rearward and upward) is required. Required.

However, the above operation is complicated,
That is, the operation for changing the seating position on the seat may be complicated.

Second, as described above, when the sheet is to be turned to the storage position, and the sheet is to be rotated forward and upward about the front lower pivotal support, the sheet is heavy. The operation of the movement is also complicated, that is, the operation for bringing the sheet into the storage position may be complicated.

In view of the first and second problems,
When moving the seat body back and forth, this movement is promoted, and when the seat is set to the storage posture,
It is conceivable to provide an urging means for promoting the upward and forward rotation.

However, as described above, when the urging means is provided, if the urging force for promoting the forward and backward movement of the sheet body is set to a somewhat large and preferable value by this urging means, the influence of this will cause There is a possibility that the urging force for promoting the front-upward rotation of the sheet becomes too large, and the front-upward rotation of the sheet becomes too fast.

Contrary to the above, the value of the urging force for promoting the forward and upward rotation of the sheet is set to a preferable appropriate value so as to suppress the speed of the rotation. If so, due to this effect, there is a possibility that the urging force for promoting the forward and backward movement of the seat body may be insufficient.

Therefore, it is not easy to easily perform both the operation for changing the seating position on the seat and the operation for bringing the seat into the storage posture.

The present invention has been made in view of the above circumstances, and has as its object to facilitate an operation for changing a seating position on a seat.

In addition, the operation for bringing the seat into the storage position can be easily performed, and even in this case, the operation for changing the seating position on the seat can be easily performed. That is the task.

[0021]

Means for Solving the Problems An apparatus for changing the position and attitude of an automobile seat according to the present invention for solving the above-mentioned problems is as follows.

According to the first aspect of the present invention, there is provided a seat body 6 in which the seat 4 is located above the floor panel 2 of the vehicle body 1, and support means 7 for supporting the seat body 6 on the floor panel 2. Before the means 7 extends downward from the lower surface side of the seat body 6, the rear legs 13, 14;
Before and after pivoting the upper ends of the front and rear legs 13, 14 back and forth with the seat body 6, the upper and lower pivotal supports 15, 16 and the front and rear legs 13, 14 are provided. Before pivotally supporting the lower end of the vehicle to the floor panel 2 so as to be able to rotate back and forth, the rear and lower pivot supports 17, 19 are provided in a vehicle seat position / posture variable device.

When the seat body 6 approaches the forefront and the last part from the middle part in the front-rear direction in the front-rear movable range of the seat body 6 which moves back and forth with the front and rear rotation of the rear legs 13 and 14, An urging means 31 for urging the seat body 6 toward the above-mentioned halfway portion is provided.

According to a second aspect of the present invention, in addition to the first aspect of the present invention, the support means 7 is provided with a locking member 18 for locking the lower end of the rear leg 14 to the floor panel 2 so as to be detachable.
And a connector 53 for connecting the lower end of the rear leg 14 to the lower end of the front leg 13, wherein the locking of the rear leg 14 by the lock 18 and the front lower pivot 17 In the apparatus for changing the position and posture of an automobile seat, the seat 4 can be changed to a storage posture by turning the seat 4 upward and forward.

The urging means 31 is interposed between the seat body 6 and the front legs 13 to rotate the rear side of the seat body 6 upward with respect to the front legs 13 about the front upper pivotal support 15. First spring 3 for producing the first torque T1 to be applied
2 and a second torque T2 interposed between the floor panel 2 and the front leg 13 to rotate the front leg 13 forward with respect to the floor panel 2 about the front lower support 17. The second spring 33, the seat body 6 and the rear leg 1
And a third spring 36 for generating a third torque T3 for rotating the front portion of the seat body 6 upward with respect to the rear leg 14 with respect to the rear upper pivoting member 16 as a center. It is provided with.

[0026]

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes the body of an automobile, and an arrow Fr indicates the front of the body 1 of the automobile.

The vehicle body 1 has a floor panel 2 made of sheet metal extending substantially horizontally, and the interior of the vehicle body 1 above the floor panel 2 is a vehicle compartment 3. The vehicle compartment 3 is for passengers such as occupants. A seat 4 is provided. This sheet 4
The seat body 6 located above the floor panel 2
And support means 7 for supporting the seat body 6 on the floor panel 2.

The seat body 6 is connected to the floor panel 2.
, A seat back 9 protruding upward from the rear end side of the seat cushion 8, and a lower end of the seat back 9 being attached to a rear end of the seat cushion 8. Pivot means 1 to pivot
0, the seat back 9 is reciprocally pivotable (A, B) forward and downward about the pivot means 10. Although not shown, the seat back 9 is not shown.
Is provided with a reclining means capable of preventing the rotation of the lens at an arbitrary rotation position.

The above-mentioned seat 4 is set to a "seatable posture" for a seated person, that is, the seat cushion 8 of the seat body 6 is set to a position where the seated person can sit.
The seat back 9 is in a posture in which a seat can be rested while sitting on the seat cushion 8.

The supporting means 7 includes a pair of left and right sheet metal front legs 13 extending downward from the lower surface of the front portion of the seat cushion 8 and downward from the lower surface of the rear portion of the seat cushion 8. Extending pair of left and right sheet metal rear legs 1
4, before and after the upper ends of the front and rear legs 13 and 14 are pivotally supported by the seat cushion 8 so that the front and rear legs 13 and 14 can be rotated back and forth. A front lower pivot support 17 for pivotally supporting the lower end of the rear panel 14 to the floor panel 2 so as to be freely rotatable; and a locking fixture for releasably engaging the lower end of the rear leg 14 to the floor panel 2. And a rear lower pivoting member for pivotally supporting the lower end of the rear leg 14 to the floor panel 2 so that the rear leg 14 can rotate back and forth around the locking portion in a state of being locked by the locking member 18. The locking device 18 and the rear lower pivotal support device 19 have the same configuration.

The front and rear pivotal supports 15 and 16 are fixed to the seat cushion 8 so as to protrude from the lower surface of the seat cushion 8, respectively.
The front and rear legs 1 are attached to the brackets 21 and 22, respectively.
Pivot shafts 23 and 24 for pivotally supporting the respective upper end portions 3 and 14. On the other hand, the front lower pivot support 17 includes a bracket 26 fixed to the floor panel 2 and a pivot shaft 27 for pivotally supporting the lower end of the front leg 13 to the bracket 26.
And

As described above, the locking member 18 and the rear lower pivoting member 19 have the same structure, and are fixed to the floor panel 2 so as to serve also as the locking shaft and the pivoting shaft. A locking portion 29 and a notched engagement member which is attached to a lower end portion of the rear leg 14 and which is engaged with the locking portion 29 by the vertical movement of the rear leg 14 so as to be detachably locked to open downward. And a holding means (not shown) that is provided with a stopping portion 30 and that can hold the locked portion 30 in a locked state with the locking portion 29. Further, in the locked state of the locked portion 30 with respect to the locking portion 29, the rear leg 14 is rotatable back and forth about the locking portion 29, that is, the locking of the locking member 18. The portion 29 is pivotally supported by the floor panel 2 so that the rear leg 14 is rotatable back and forth. Hereinafter, the locking device 18 and the rear lower support 19 are simply referred to as the locking device 18.

As shown in FIGS. 1 and 2, the front lower support 1
The front leg 13 and the rear leg 14 are pivoted about the pivot shaft 27 of FIG. A rear rotation stopper 34 is provided for abutting a part of the front leg 13 to prevent further rear rotation when the rear panel is rotated to the rear rotation position. It is stuck to. As described above, when the front leg 13 is further prevented from rotating backward, the rear leg 14 is prevented from further rotating backward, and the seat body 6 is further prevented from moving backward. 6 is the last part.

As shown by a solid line in FIG. 3, the front leg 13 is pivoted around a pivot shaft 27 of the front lower pivot device 17.
Further, when the rear leg 14 rotates forward from the posture extending substantially in the vertical direction around the rear lower pivot support 19 of the locking member 18 and rotates to a predetermined forward rotation position, the front leg A front rotation stopper 35 is provided for abutting a part of the block 13 to prevent further forward rotation. The front rotation stopper 35 is formed on the bracket 26 of the front lower pivot support 17. When the front leg 13 is prevented from further turning forward as described above, the front leg 13 is also prevented from further turning forward, and the seat body 6 is also prevented from further moving forward. 6 is the forefront part.

That is, the range of the seat body 6 from the last part shown in FIGS. 1 and 2 to the foremost part shown by the solid line in FIG. "It is.

In the above case, the posture of the front leg 13 extending in the vertical direction connects the pivot shaft 23 of the front upper pivot 15 and the pivot shaft 27 of the front lower pivot 17 in a side view of the vehicle body 1. The vertical line of the rear leg 14 refers to a vertical line, and the posture of the rear leg 14 in the vertical direction refers to the pivot shaft 24 of the rear upper support 16 in a side view of the vehicle body 1.
This means that the line connecting the hook and the locking portion 29 of the locking tool 18 is a vertical line.

In FIGS. 1 to 3, the seat body 6 described above is used.
When the seat body 6 approaches the forefront and the last part from the middle part in the front-rear direction (the dashed line in FIG. 3) in the front-back movable range, the seat body 6 is elastically biased toward the middle part. A biasing means 31 is provided. More specifically, the urging force of the urging means 31 becomes stronger as the seat body 6 approaches the forefront and the last part.

1 and 2, the urging means 31 is interposed between the seat body 6 and the front leg 13 so that the rear side of the seat body 6 with respect to the front leg 13 around the front upper pivotal support 15. Spring 32 for generating a first torque T1 for turning the upper panel upward, the floor panel 2 and the front legs 13
And a second spring 33 for generating a second torque T2 for rotating the front leg 13 forward with respect to the floor panel 2 about the front lower pivot 17 and the seat body 6. A third torque T3 which is interposed between the rear leg 14 and the rear leg 14 to rotate the front side of the seat body 6 upward with respect to the rear leg 14 about the rear upper support 16 is generated. And three springs 36. The first to third springs 3
2, 33, and 36 are all the pivot shafts 23,
It is a helical spring wound around 24, 27,
It may be a coil spring.

Then, as shown in FIGS. 1 and 2, when the seat body 6 is at the last position, the first torque T1 <the second torque
There is a relationship of torque T2 + third torque T3, that is, the urging means 31 moves the seat body 6 so as to face an intermediate part.
Is biased forward.

As shown by the solid line in FIG. 3, when the seat body 6 is at the frontmost position, the first torque T1> the second torque
There is a relationship of torque T2 + third torque T3, that is, the urging means 31 moves the seat body 6 so as to face an intermediate part.
Is biased rearward.

As shown by the dashed line in FIG. 3, when the seat body 6 is located at a neutral position where it does not receive any urging force in the intermediate position, the relationship of the first torque T1 = second torque T2 + third torque T3 is satisfied. The sheet body 6 is held at that position without being urged forward or backward.

When a weight corresponding to the average weight of the occupant is placed on the seat body 6, the neutral portion of the seat body 6 has the front and rear legs 13, 14 extending substantially vertically. The seat is in a posture, that is, located before the top of the convex arc of the movement locus of the seat body 6 and behind the foremost part.

Before the seat cushion 8 described above,
A rotation preventing means 38 is provided which can prevent the rotation of at least one of the rear legs 13 and 14 at an arbitrary rotation position. Specifically, the rotation preventing means 38 is connected to the front leg 1.
3 and a plurality of notched locked portions 39 formed at an upper end portion of the front leg 13 and a bracket 21 of the front upper support 15 by a pivot shaft 40 for reciprocating rotation. (C, D) an arm-shaped locking portion 41 which is freely pivotally supported and selectively engages with and engages with one of the notches of the locked portion 39 in the forward rotation (C); An operation portion 42 protruding from the locking portion 41 is provided. In this case, the locking portion 41 is urged by a spring (not shown) so as to rotate forward (C), that is, urged in a direction to engage with the locked portion 39.

Another rotation preventing means 45 is provided which can prevent the rear leg 14 from rotating forward more than a predetermined amount with respect to the seat cushion 8. The rotation preventing means 45 includes a locked concave portion 46 formed at the upper end of the rear leg 14,
The bracket 22 of the rear upper support 16 is pivotally supported by a pivot shaft 47 so as to be reciprocally pivotable (E, F), and is removably engaged with the locked recess 46 by the forward pivot (E). And a locking arm portion 48 to be fitted. In this case, the locking arm 48 is urged by a spring (not shown) so as to make a forward rotation (E), that is, urged in a direction of engaging with the locked concave portion 46.

An interlocking cable 49 for interlockingly connecting the bracket 26 of the front lower support 17 and the locking arm portion 48 to each other is provided. The middle portion of the interlocking cable 49 in the longitudinal direction is the seat cushion 8 and the front leg. 13 and is fitted so as to be slidable only in the longitudinal direction thereof.

At the lower end of the front leg 13, there is provided a connecting tool 53 which is an interlocking link of a metal elastic bar having a circular cross section for interlockingly connecting the lower end of the rear leg 14. This connecting tool 53
Is elastically bendable, the front end of one end is pivotally supported by the lower end of the front leg 13 by the pivot shaft 27, and the rear end of the other end is the lower end of the rear leg 14. The part is pivotally supported by another pivot shaft 55. In addition, the said connection tool 5
3 is a floor panel 2 near the lower end of the front leg 13.
Alternatively, it may be pivotally supported by the bracket 26 of the front lower pivot support 17, that is, may be connected to the lower end of the front leg 13 via the floor panel 2 or the bracket 26.

As shown in FIGS. 1 and 2, when the seat body 6 is located at the rearmost position, the front leg 13 abuts the rear rotation stopper 34 to prevent further rearward rotation.
In addition to this, the locking portion 41 is engaged with the cutout at the lowermost end of the locked portion 39 in the rotation preventing means 38, and the seat around the pivot shaft 23 of the front upper pivoting tool 15 is centered. The relative rotation between the cushion 8 and the front leg 13 is prevented. Further, the locking arm portion 48 engages with the locked concave portion 46 of the other rotation preventing means 45, and the seat cushion 8 and the rear leg 14 around the pivot shaft 24 of the rear upper pivot device 16. Are prevented from rotating relative to each other.

Therefore, the seat body 6 is located at the rearmost position of the seat 4 in the "seatable posture", and the rear rotation stopper 34 and the both-rotation preventing means 38, 4 in the support means 7 are provided.
5 allows the floor panel 2 to be firmly supported.
The rotation preventing means 38 controls the seat cushion 8
When the relative rotation between the front cushion 13 and the front leg 13 is blocked, the relative rotation between the seat cushion 8 and the rear leg 14 is also blocked indirectly, and the other rotation blocking means 45 may be omitted.

From the last part of the seat body 6 in the "seatable posture" of the seat 4 shown by FIGS. 1 and 2 and the two-dot chain line in FIG. When the engaging portion 41 is disengaged from the locked portion 39 by returning to the back (D), the front of the seat body 6 is rotated forward by the front and rear legs 13 and 14 with respect to the floor panel 2. Movement is allowed.

Therefore, the pivot shaft 27 of the front lower pivot support 17 is provided.
And the front and rear legs 1 around the locking portion 29 of the locking device 18.
When the seat body 6 is moved forward so that the seat body 6 is positioned at the frontmost position in the "seatable posture" of the seat 4, as described above, as shown by the solid line in FIG. Further, the forward rotation of the front leg 13 is prevented by the front rotation stopper 35. Therefore, if the locking portion 41 of the rotation preventing means 38 is rotated forward (C), the locking portion 41 engages with the notch at the uppermost end of the locked portion 39, and The relative rotation between the seat cushion 8 and the front leg 13 around the pivot shaft 23 of the pivot support 15 is prevented.

Therefore, the seating position of the seat body 6 with respect to the seat 4 is changed from the last position in the "seated position" to the foremost position.
Are firmly supported by the floor panel 2 by the front rotation stopper 35 and the rotation prevention means 38. When the seat body 6 is located at the last position, the shape of the connecting member 53 is in a free state. However, when the seat body 6 is moved to the foremost position, the pivot shaft 27 and the other parts are connected. The distance from the pivot shaft 55 changes. At this time, the connecting tool 53 is slightly elastically deformed and bent, so that the change in the size is absorbed.

The state of the last part of the seat body 6 in the "seatable posture" of the seat 4 shown by the above-mentioned FIGS. 1 and 2 and the two-dot chain line in FIG. 3 (or the solid line shown in FIG. 3) From the state of the frontmost portion of the seat body 6 in the “seatable posture” of the seat 4), the locking portion 41
Is rotated backward (D), and the engagement of the locking portion 41 with the locked portion 39 is released, so that the front and rear legs 13 and 14 rotate forward (or backward rotate) with respect to the floor panel 2. ) Is allowed to move forward (or backward) of the seat body 6.

Therefore, the pivot shaft 27 of the front lower pivot device 17 is provided.
And the front and rear legs 1 around the locking portion 29 of the locking device 18.
By rotating the seats 3 and 14 forward (or backward), the seat body 6 is moved forward (or backward) so that the seat body 6 is positioned at an intermediate position in the front-rear direction in the “seatable posture” of the seat 4. The locking portion 41 of the rotation preventing means 38
Is rotated forward (C), and the locking portion 41 is engaged with the notch in the middle of the locked portion 39.
The relative rotation of the seat cushion 8 and the front leg 13 around the pivot shaft 23 of the fifth body 5 is prevented. For example, the position change of the seat body 6 is prevented at a position indicated by a dashed line in FIG. Thereby, the seating position with respect to the seat 4 is
It can be changed to a middle part in the front-rear direction in the “seatable posture”.

In the above case, when the seat body 6 is moved forward from the last position, the interlocking cable 49 slides forward in the guide tube 50, and the guide tube 50 rotates the locking arm portion 48 back ( F), the locking arm portion 48 separates from the locked concave portion 46, and the rotation inhibition by the other rotation inhibiting means 45 is automatically released. On the other hand, when the seat body 6 moves rearward and returns to the last position, the locking arm 48 rotates forward (E) by the urging force of a spring (not shown), and is again moved into the locked concave portion 46. Engagement, thereby automatically preventing rotation by the other rotation prevention means 45 described above.

According to the above configuration, in short, in the “seatable posture” of the seat 4, the front and rear legs 13, 1 with respect to the seat cushion 8 are operated by operating the rotation preventing means 38.
4 and then the front and rear legs 13, 14
Is rotated with respect to the floor panel 2 and the seat cushion 8, respectively, to change the seat body 6 to a desired position in the front-rear direction, and the rotation of the front and rear legs 13, 14 with respect to the seat cushion 8 at this position. If the rotation is prevented by the rotation preventing means 38 in the moving position, the seat body 6 can be supported at a desired position in the front-rear direction of the floor panel 2, that is, the seating position on the seat 4 can be adjusted. It can be changed back and forth according to the physique and preference of the seated person.

Moreover, as described above, the front and rear legs 13,
When the seat body 6 approaches the forefront and the last part from the middle part in the front-rear direction in the front-rear movable range of the seat body 6 that moves back and forth with the back-and-forth rotation of the seat body 6,
There is provided an urging means 31 for urging the head toward the intermediate part.

Therefore, when the seat body 6 is to be moved forward from the rearmost position by the front rotation of the front and rear legs 13 and 14 with respect to the floor panel 2, the seat body 6 is particularly provided with the second spring 33. The second main body 6 is biased to move forward by the second torque T2 and the third torque T3 of the third spring 36. Therefore, the operation of moving forward from the last part of the seat body 6 can be lightened.

Contrary to the above, the seat body 6 is moved from the middle part to the front and rear legs 13, 14 with respect to the floor panel 2.
When the rearward rotation of the second spring 33 is attempted, the movement is particularly caused by the second torque T2 of the second spring 33 and the third torque.
It is necessary to resist the urging force of the spring 36 third torque T3,
Further, when the seat body 6 is located at a particularly neutral position in the middle part, the seat body 6 is located forward of the top of the convex arc of its movement trajectory. The movement of the seat body 6 is usually performed by the seated person stretching the legs against the floor panel 2 and utilizing the weight thereof, so that the rearward movement operation of the seat body 6 can be performed lightly.

Further, as described above, when the seat body 6 moves backward from the halfway part and approaches the last part, and this backward movement falls backward, the second spring 33
The urging force by the torque T2 and the third torque T3 of the third spring 36 suppresses the rapid downward and rearward movement of the seat body 6, so that when the seat body 6 moves backward, the seated person sitting on the seat body 6 An unpleasant feeling such as falling down rearward is suppressed.

On the other hand, when the seat body 6 is to be moved rearward from its frontmost position by rotating the front legs 13 and 14 rearward with respect to the floor panel 2, the seat body 6 is particularly supported by the first spring 32. The seat body 6 is urged to move backward by the first torque T1, so that the operation of moving backward from the foremost part of the seat body 6 can be lightened.

On the contrary, when the seat body 6 moves forward from the halfway part and approaches the foremost part, and this forward movement falls forward, the first torque T1 of the first spring 32 is used. Since the urging force suppresses the rapid forward and downward movement of the seat body 6, when the seat body 6 moves forward, an uncomfortable feeling such as falling forward and downward is given to a seated person sitting on the seat body 6. Is suppressed.

Therefore, the operation for changing the seating position on the seat 4 back and forth can be performed easily and lightly.

As shown by the solid line in FIG. 1, when the seat back 9 is turned forward (A) from the state where the seat body 6 is located at the last position in the “seatable posture” of the seat 4, The seat back 9 can be overlaid on the upper surface side of the seat cushion 8 (two-dot chain line in FIG. 1).

4 and 5, in the state where the locked portion 30 is detached from the engaging portion 29 of the engaging device 18, that is, in the state where the rear leg 14 is detached from the floor panel 2, The seat 4 in a state where the seat back 9 is overlaid on the seat cushion 8 is reciprocally rotatable upward and forward around the pivot shaft 27 of the front lower pivot support 17.

When the seat 4 is to be stored when not in use, for example, the seat back 9 is superimposed on the seat cushion 8 as described above, and the pivot shaft of the front lower pivot bracket 17 is provided. The seat 4 is rotated upward and forward around the center 27, which will be described more specifically.

When the user intends to store the seat 4 in a state where the seat 4 can be seated, first, the seat back 9 is placed on the seat cushion 8 and the engaging member 18 is engaged. Locked part 3 with respect to stop part 29
0 is released, the front leg 13 is rotated forward to a predetermined rotation position around the pivot shaft 27 of the front lower pivot support 17 and further rotated by the rear rotation stopper 34. The forward rotation is prevented (solid lines in FIGS. 4 and 5), and the seat body 6 is rotated forward and upward around the pivot 23 of the front upper pivotal support 15 (solid line in FIG. 4).

In the above case, the forward rotation of the front leg 13 about the front lower pivot 17 is caused by the second torque T of the second spring 33.
2, the seat 4 is turned forward and upward by the second torque T2 of the second spring 33 when the lock 18 is released as described above. Try to be let. Here, the seat 4 has a downward torque about the front lower pivotal support 17 due to its own weight, and this torque and the second torque T2 of the second spring 33 are substantially matched with each other. ing. For this reason, a slight positive operation force for turning the seat 4 upward and forward or a slight negative operation force for suppressing the upward rotation of the seat 4 is applied. Thus, the seat 4 can be rotated lightly upward and forward.

In the above state, the rotation preventing means 38
The locking portion 41 is disengaged from the locked portion 39 to release the locking, and the seat body 6, the front leg 13, and the rear leg 1 are released.
4, and a combination body (6, 13, 1
4, 53) is a rhombus that is long in the up-down direction and small in the front-rear direction when viewed from the side of the vehicle body 1, so that the width of the seat 4 in the front-rear direction is small, and the seat 4 is compact.

From the above state, the seat body 6 is further rotated forward and upward about the pivot shaft 23 of the front upper pivotal support 15 to a predetermined rotational position away from the floor panel 2. When the seat 4 is rotated (indicated by the alternate long and short dash line in FIGS. 4 and 5), the sheet 4 is set in a diamond-shaped “storage posture” with a smaller width. As described above, when the seat 4 is set in the “storage posture”, the storage stopper 56 that prevents further rotation of the sheet body 6 in the forward and upward direction is provided. The locking portion 41 of the rotation preventing means 38 and a stopper surface 57 formed on the front leg 13 and contacting the locking portion 41. And
The sheet 4 is stored in the "storage posture" (dotted line in FIGS. 4 and 5).

In the above case, when the locking by the rotation preventing means 38 is released, the first torque T1 of the first spring 32 is released.
Urges the combined body (6, 13, 14, 53) so that the above-mentioned width dimension becomes a smaller rhombus, while the third torque T3 of the third spring 36 is opposite to the above. The combination (6,13,14,53) is urged to make the above width larger. In this case, the first spring 3
The first torque T1 of the second spring 36 is slightly smaller than the third torque of the third spring 36.
The torque T3 is set to be larger than the torque T3. Therefore, when the locking of the rotation preventing means 38 is released, the combination (6, 13, 14, 53) is formed into a diamond shape at a rapid speed. It is prevented, that is to say, at an appropriate speed and automatically in the shape of the diamond.

Therefore, the seat 4 is placed in the “seatable posture”.
Therefore, the operation to make the compact "storage posture" can be performed lightly and smoothly.

As described above, when the operation of changing the seating position of the seat 4 in the front-rear direction by the urging forces of the first to third springs 32, 33, 36 is facilitated, it is assumed that Even if the third spring 36 (or the second spring 33) is not used, if the second spring 33 (or the third spring 36) has the total torque (T2 + T3), the same operation as described above occurs. Thus, the operation of changing the seating position can be easily performed as described above.

However, assuming that the second spring 33 has the above-described total torque, when the seat 4 is set to the “storage posture”, the seat 4 is moved forward and upward around the front lower pivot 17. The rotation of the is suddenly unfavorable,
Assuming that the third spring 36 has the above total torque, when the seat 4 is set to the “storage posture”, the front upward rotation of the seat 4 is not biased, and the seat 4 is set to the “storage posture”. Operation becomes complicated.

Therefore, as described above, the first spring 32,
The second spring 33 and the third spring 36 are provided so that torque is generated in each of the desired directions.
Therefore, as described above, even when the operation for causing the seat 4 to be in the “storage posture” can be easily performed, the operation for changing the seating position on the seat 4 can also be easily performed.

In FIGS. 4 and 5, when the seat 4 is rotated forward and upward about the front lower support 17, the rotation preventing means 38 is interlocked with the forward and upward rotation. , A rotation prevention release mechanism 58 for automatically releasing the rotation prevention state of the front leg 13 is provided.

The rotation inhibition release mechanism 58 includes a release arm 60 pivotally supported on the front leg 13 by a pivot shaft 59.
And a link 61 for connecting the release arm 60 to the bracket 26 of the front lower pivot support 17.

Then, when the seat 4 is rotated forward and upward around the front lower pivot 17 from the state where the seat body 6 is located at the last position in the “seatable posture” of the seat 4. The rotation of the release arm 60 is controlled by a link 61 connecting the release arm 60 to the bracket 26 of the front lower support 17, and the release arm 60 is engaged with the locked portion 39. The engaged locking portion 41 is forcibly rotated backward (D) to release the engagement, that is, the rotation preventing state of the front leg 13 by the rotation preventing means 38 is set. Canceled automatically. At this time, as described above, the state in which the rotation of the rear leg 14 is prevented by the other rotation preventing means 45 is also determined by the interlocking cable
And the guide tube 50.

According to the above configuration, the pivot shaft 2 of the front lower pivot bracket 17 attempts to change from the “seatable posture” of the seat 4 to the “storage posture” for accommodating the seat 4.
When the front leg 13 is rotated forward and upward around the center 7, the rotation preventing state of the front leg 13 by the rotation preventing means 38 is automatically released, so that the seat 4 is compactly stored.
In this case, since the operation to the rotation preventing means 38 is not required, the operation for bringing the sheet 4 into the "storage posture" is further facilitated.

As described above, the front leg 13 is turned around the pivot shaft 27 of the front lower pivot support 17 to a predetermined pivot position (solid line in FIGS. 4 and 5), and the seat body 6 is rotated. Is pivoted forward and upward about the pivot shaft 23 of the front upper pivotal support 15 to a predetermined pivot position, so that the seat 4 is in the “storage posture”.
(Indicated by the alternate long and short dash line in FIGS. 4 and 5), the front leg 13 and the seat body 6 are prevented from further turning forward, and are also prevented from turning backward therefrom. In order to maintain the “storage posture” of No. 4, locking means 65 for locking the seat cushion 8 to the floor panel 2 so as to be detachable is provided.

The locking means 65 prevents the forward rotation of the front leg 13 when the front leg 13 is rotated to a predetermined rotation position about the pivot shaft 27 of the front lower pivot support 17. When the movement stopper 35 and the seat body 6 rotate forward and upward to a predetermined rotation position around the pivot shaft 23 of the front upper pivotal support 15, further forward and upward rotation is prevented. The storage stopper 56 is provided.

The locking means 65 is provided with the front leg 13.
Is pivotally supported by the floor panel 2 via the bracket 26 by the pivot shaft 66 so that the upper portion thereof is rotatable in the front-rear direction so that the upper portion thereof is rotatable in the front-rear direction. Arm 67 and the rotating arm 6
A spring 68 for urging the rotation arm 7 forward; a stopper means 69 for preventing further rotation when the rotation arm 67 is rotated forward to a predetermined rotation position; A notch-shaped engaging portion 72 provided integrally with the rotating end of the seat 4; and the engaging portion 72 fixed to the seat cushion 8 and capable of engaging and disengaging from the engaging portion 72 when the seat 4 is in the "storage posture". And a shaft-shaped locked portion 73 locked to the shaft.

In the above case, the pivot 23 of the front upper pivot 15
The locked portion 73 is engaged immediately before the locked portion 73 that rotates with the rotation of the seat body 6 in the front and upper direction around the locking portion 72 is about to be locked. While sliding against the upper end surface of the stopping portion 72 while being pressed against it, the turning arm 67 is once turned back together with the locking portion 72 while resisting the urging force of the spring 68 (indicated by a dashed line in FIG. 5). Then, the locking portion 72 which rotates forward together with the rotating arm 67 by the biasing force of the spring 68 automatically locks the locked portion 73.

The locking portion 72 has a cutout shape, and when the locked portion 73 is locked to the locking portion 72,
Rotation of the seat body 6 back and forth about the pivot 23 of the front upper pivot 15 is firmly prevented without rattling. As a result, the seat 4 is in the "storage posture".
Is held.

In FIGS. 2, 5, and 6, the locked state of the locking means 65 in which the locked portion 73 is locked to the locking portion 72 can be released by inputting an operation force G from the outside. Is provided, and the release of the lock releases the holding of the “storage posture”.

The lock release operation means 75 includes one end 77
Is connected to a longitudinally intermediate portion of the rotating arm 67,
The other end 78 protrudes rearward from the rotating arm 67, and the other end 78 is provided with a flexible tension member 79 which is a grip portion of the operator and serves as an input portion of the operation force G. . If the other end 78 of the pulling body 79 is gripped and the operation force G is input and pulled backward to move backward, the rotating arm 67 rotates backward in conjunction with this and the locking The locking between the portion 72 and the locked portion 73 can be released.

The tension member 79 is formed of a flexible belt material, is formed into an elongated ring shape in the front-rear direction in plan view, and includes left and right side pieces 79a, 79a which approach each other in the vehicle width direction and face each other. I have. The connecting tool 5 is located behind the rotating arm 67 and substantially at the same position as the rotating arm 67 in the vehicle width direction.
The left and right side pieces 79 a, 7 in the longitudinal middle part of the tension body 79 are provided.
9a, a part of the connecting member 53 is penetrated, and by this penetration, a longitudinally intermediate portion of the tension member 79 engages a part of the connecting member 53 slidably in the longitudinal direction. Have been allowed. Further, when the tension body 79 moves rearward along substantially the longitudinal direction, at least one of the side pieces 79a, 79a in the middle part of the tension body 79 is guided by a part of the coupling tool 53, and The one end 77 moves in the “predetermined direction”.

In FIGS. 5 and 6, in order to release the locking of the locked portion 73 by the locking portion 72, the other end portion 78 of the tension member 79 is gripped and pulled rearward to be moved rearward. When the rotating arm 67 is rotated backward about the pivot shaft 66 so as to interlock with this, an excessive force is not generated around the pivot shaft 66 so that the tension can be smoothly performed. In order to perform this operation, the moving direction of the other end 78 of the pulling body 79 in the plan view of the vehicle body 1 is changed to the turning direction of the turning arm 67 about the pivot shaft 66 (the diameter of the pivot shaft 66). Direction), it is preferable that the “predetermined direction” substantially coincides with the rotation direction of the rotation arm (solid line in FIG. 6).

The left and right pieces 79a, 79a of the other end 78 of the tension member 79 are sewn to each other to form a sewn portion 80a.
Is provided so that the sewn portion 80 and the end on the other end portion 78 side of the sewn portion 80 can be easily gripped, and rigidity is given so that the tension body 79 is not bent more. I have. Note that the sewing portion 80 may not be provided.

When the holding of the "storage posture" is released by operating the lock release operation means 75, the seat 4 is allowed to rotate backward and downward from the "storage posture". Therefore, when the seat 4 is rotated rearward and downward, the release arm 60 allows the engagement of the locking portion 41 with the locked portion 39 on the way, and this engagement and the seat 4 By turning further rearward and downward, the seated position
Can be made.

In the above case, when the lower end portion of the rear leg 14 which rotates with the rearward and downward rotation of the seat 4 is to be locked to the floor panel 2 by the locking member 18, The lower end of the rear leg 14 is positioned at a predetermined position with respect to the locking device 18 by the connecting tool 53 connecting the lower end of the rear leg 14 to the lower end of the front leg 13.
The locked portion 30 of the locking member 18 is securely engaged with the locking portion 29 so as to be freely disengageable, and the seat 4 is returned to the “seatable posture”.

In FIGS. 2, 5, and 6, an interlocking body 84 is provided on the front leg 13 so as to interlock and connect the rotating arm 67. This interlocking body 84 includes a link 85 that extends long in the front-rear direction. One end (front end) of the link 85 is formed with a long hole 86 extending in the longitudinal direction. The long hole 86 and an engaging pin 87 attached to the upper part of the rotating arm 67 slide back and forth. It is engaged so as to be free. The other end (rear end) of the link 85
Is pivotally supported on the upper part of the front leg 13 by a pivot 88.

In the “storage posture” of the seat 4, the engaging pin 87, which has been rotated forward together with the rotating arm 67 by the bias of the spring 68, comes into contact with the front edge of the elongated hole 86, and Further forward rotation of the arm 67 is prevented (solid line in FIG. 5).

On the other hand, as described above, in order to release the locking of the locked portion 73 by the locking portion 72, the tension member 79 is pulled and the rotating arm 67 is rotated backward, and this rotation is performed. The engagement pin 87 that rotates rearward with the arm 67 slides rearward through the long hole 86 to allow the release of the lock (two-dot chain line in FIG. 5).

According to the above configuration, the locking means 65 protrudes upward from the floor panel 2 near the front of the front leg 13, and the lower end thereof is rotatable in the front-rear direction. A pivot arm 67 pivotally supported by the floor panel 2, a locking portion 72 provided at a rotation end of the rotation arm 67, and a locking portion 72 provided on the seat cushion 8 so as to be freely detachable from the locking portion 72. A locked portion 73 to be locked is provided, and an interlocking body 84 for interlockingly connecting the rotating arm 67 to the front leg 13 is provided.

Therefore, when the front leg 13 is rotated in the front-rear direction, for example, when the seating position on the seat body 6 is changed, the rotating arm 67 is moved by the interlocking body 84 to move the front leg 13. It rotates together with the front leg 13 in the vicinity.

Therefore, the pivot arm 67, which is a part of the components of the locking means 65, is capable of moving the seat 4 in either the "seatable posture" or the "storage posture". It is suppressed that the sheet 4 largely protrudes outward from the seat body 6 and the support means 7, and the seat 4 is kept compact as a whole in any posture.

[0098]

The effects of the present invention are as follows.

According to the first aspect of the present invention, there is provided a seat body in which a seat is located above a floor panel of a vehicle body, and a supporting means for supporting the seat body on the floor panel, wherein the supporting means comprises the seat Before extending downward from the lower surface side of the main body, before and after the rear legs, and before and after pivoting the upper ends of the front and rear legs to the seat body so that the front and rear legs can be rotated back and forth, In the apparatus for changing the position and posture of an automobile seat, the front and rear lower supports are pivotally supported on the floor panel so that the lower ends thereof are rotatable back and forth. ,

When the seat body approaches the foremost and last parts from the middle part in the front-back direction in the front-rear movable range of the seat body which moves back and forth with the front and rear rotation of the rear legs,
An urging means for urging the seat body toward the halfway portion is provided.

Therefore, when the seat body is to be moved forward from its rearmost position by the front rotation of the front and rear legs with respect to the floor panel, the seat body is
In response to this, the forward bias toward the halfway portion can lighten the operation of moving forward from the last portion.

On the other hand, when the seat body is to be moved rearward from the foremost portion by the front and rear rotations of the rear legs with respect to the floor panel, the seat body is moved forward toward the above-mentioned halfway portion with respect to the main body. By the biasing, the operation of moving backward from the foremost part can be lightened.

Therefore, the operation for changing the seating position on the seat back and forth can be performed easily and lightly.

According to a second aspect of the present invention, the support means includes a locking member for locking the lower end of the rear leg to be detachable from the floor panel, and a lower end of the rear leg on the lower end of the front leg. And a connecting device for connecting the parts, and the seat is stored in the storage posture by releasing the locking of the rear leg by the locking device and rotating the seat forward and upward around the front lower pivot support. In the position and posture variable device of the automotive seat that can be changed,

The biasing means is interposed between the seat body and the front leg, and is a first torque for rotating the rear portion of the seat body upward with respect to the front leg about the front upper pivot support. And a second torque interposed between the floor panel and the front leg for generating a second torque for rotating the front leg forward with respect to the floor panel about the front lower pivotal support. A second torque interposed between the spring and the seat body and the rear leg to generate a third torque for rotating the front portion of the seat body upward with respect to the rear leg about the rear upper pivot support; And a third spring to be operated.

Therefore, when the lower end of the rear leg is pivotally supported on the floor panel by the rear lower pivot, the seat body is moved from its rearmost position by the front and rear rotation of the rear leg relative to the floor panel. When the seat body is to be moved forward, the seat body is particularly urged to move forward by the second torque of the second spring and the third torque of the third spring, so that the seat body is moved forward from the last part of the seat body. Can be operated lightly.

On the other hand, when the seat body is to be moved rearward from the frontmost position by the front and rear rotations of the rear legs with respect to the floor panel, the seat body is moved rearward particularly by the first torque of the first spring. Therefore, the operation of moving the seat body backward from the forefront portion of the seat body can be performed lightly.

In the above case, the forward rotation of the front leg about the front lower support is urged by the second torque of the second spring as described above. When the locking of the component is released, the seat is about to be turned forward and upward by the second torque of the second spring. For this reason, the seat can be rotated lightly forward and upward.

Therefore, the operation for bringing the sheet into the "storage posture" can be easily performed.

As described above, when the seat is rotated forward and upward in order to bring the seat into the "storage posture", the first torque of the first spring is applied to the seat body,
The combination of the front leg, the rear leg, and the connector is urged so that the front and rear widths become smaller rhombuss, while the third torque of the third spring reverses the above to move the combination to the width dimension. Is biased to be larger, so that the combination is prevented from being diamond-shaped at a rapid speed, for example.

Therefore, the operation for changing the seat from the “seatable position” to the “storage position” can be performed lightly and smoothly.

As described above, when the operation of changing the seating position in the front-rear direction with respect to the seat is facilitated by the urging forces of the first to third springs, it is assumed that the third spring (or the second spring) is used. Even if the spring is not used, if the second spring (or the third spring) has the total torque of these, the same operation as described above occurs, and the operation of changing the seating position is performed as described above. It can be easily done in the same way as.

However, assuming that the second spring has the above-mentioned total torque, when the seat is to be in the "storage posture", the seat pivots upward and forward about the front lower pivot. If the third spring has the above total torque, on the other hand, if the third spring has the above total torque, when the seat is set to the "storage posture", the forward and upward rotation of the seat is no longer biased, and The operation for setting the “storage posture” becomes complicated.

Therefore, as described above, the first spring and the second spring
By providing a spring and a third spring, a torque is generated in each of the springs in a desired direction. Therefore, as described above, the operation for bringing the seat into the "storage posture" can be easily performed. Even in this case, the operation for changing the seating position on the seat can be easily performed.

[Brief description of the drawings]

FIG. 1 is an overall side view of a seat when a seat body is at a rearmost position in a “seatable posture” of the seat.

FIG. 2 is a partially enlarged view of FIG.

FIG. 3 is an operation explanatory view corresponding to FIG. 1 for explaining an operation in a “seatable posture” of a seat.

FIG. 4 is a diagram illustrating an operation when a sheet is stored.
FIG.

FIG. 5 is a partially enlarged view of FIG. 4;

FIG. 6 is a sectional view taken along line 6-6 of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 2 Floor panel 3 Cab 4 Seat 6 Seat body 7 Support means 8 Seat cushion 9 Seat back 10 Pivot support 13 Front leg 14 Rear leg 15 Front upper support 16 Rear upper support 17 Front lower support 18 Locking device 19 Rear lower support 31 Energizing means 32 First spring 33 Second spring 34 Rear rotation stopper 35 Front rotation stopper 36 Third spring 53 Connector T1 First torque T2 Second torque T3 Third torque

Claims (2)

[Claims] 1. A seat body having a seat positioned above a floor panel of a vehicle body, and support means for supporting the seat body on the floor panel, wherein the support means extends downward from a lower surface of the seat body. The front and rear upper supports, before and after the rear legs, and before and after the upper ends thereof are pivotally supported by the seat body so that the front and rear legs can be freely rotated back and forth. Before pivoting the lower end of each of the legs to the floor panel so that the legs can be rotated back and forth, in a position and posture varying device for an automobile seat including a rear lower pivot, the front and rear legs In the front-rear movable range of the seat body that moves back and forth with the back-and-forth rotation, when the seat body approaches the foremost and last parts from the middle part in the front-rear direction, the urging biases the seat body toward the middle part. Vehicle Position of the door, the attitude changing device. 2. The locking means for locking the lower end of the rear leg to the floor panel so as to be freely detachable,
A connector for connecting the lower end of the rear leg to the lower end of the front leg; releasing the locking of the rear leg by the locking device and moving the seat forward and upward centering on the front lower pivot support; In the apparatus for changing the position and posture of a seat for an automobile in which the seat can be changed to the storage posture by the rotation of the vehicle, the urging means is interposed between the seat body and the front leg, and the front upper pivot is provided. A first spring for generating a first torque for rotating the rear part of the seat body upward with respect to the front leg with respect to the front leg, and the front lower pivot support interposed between the floor panel and the front leg. A second spring for generating a second torque for rotating the front leg forward with respect to the floor panel with respect to the floor panel; and a second spring interposed between the seat body and the rear leg, with the rear upper support as a center. The third part which attempts to rotate the front side of the seat body upward with respect to the rear legs The apparatus according to claim 1, further comprising a third spring that generates a torque.