JP2003054297A - Seat device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve operability and safety in operation by reducing a seat operating force in a seat device for a vehicle. SOLUTION: This seat device for vehicle in which the seat 2 is rotatably supported by a rotating and supporting mechanism 6 provided with a fulcrum shaft 8, whose attitude can be changed between an attitude at use and an attitude at storage, is provided with a first spiral spring 13 for accumulating a force at rotation operation from the use attitude to the storage attitude and for assisting the rotation operation from the storage attitude to the use attitude with its restoring force and a second spiral spring 14 for accumulating a force at the rotation operation from the storage attitude to the use attitude and for assisting rotation operation from the use attitude to the storage attitude with its restoring force. By such a constitution, an operation force is reduced and operability is improved by the assisting action of the spiral springs 13 and 14, and safety in operation is improved by rotation restricting action of the fulcrum shaft 8 accompanying force accumulation of each of the spiral springs 13 and 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat device that can be stored and taken out.

[0002]

2. Description of the Related Art Conventionally, in a vehicle seat device, a second row seat or a third row seat is taken out and placed on a floor surface of a vehicle body when used (that is, in use posture), while When not in use, it is stored in a storage recess that is recessed in the floor of the vehicle body (that is, storage posture), so-called "storing / removing method" is adopted, and the vehicle interior space is expanded especially when the seat is not used. Is being done.

In this case, the seat is normally folded (that is, the seat back is laid down and stacked on the seat cushion), and in this state, the seat is rotated at its rear end or front end. The support mechanism is rotated by manual operation to selectively set the use posture and the storage posture.

[0004]

However, in the conventional "storing / removing type" seat device, the seat is simply and rotatably supported by the swivel support mechanism, and the operator operates the operation strap or the like. Since the seat is stored and taken out by manually pushing and pulling the operation member of, the relative relationship between the rotation center position of the seat and the center of gravity position of the seat, and the operation force of the seat The degree of change in the required operating force is large in response to the action direction changing with the rotation of the seat, and moreover, the operating force is rotated against the rotational force due to the weight of the seat. The value of the maximum operating force was also large, and there was room for improvement in terms of operational safety and operability.

In view of the above, the present invention has an object of reducing the operating force at the time of storing / removing a seat to enhance the operability and enhance the operational safety in the vehicle seat device of the storing / removing system. It was made.

[0006]

In the present invention, the following constitution is adopted as a concrete means for solving such a problem.

In the first invention of the present application, the seat 2 is rotatably supported on the vehicle body floor surface 21 side through the rotation support mechanism 6 having the fulcrum shaft 8 and is taken out on the vehicle body floor surface 21. The fulcrum shaft of the rotation support mechanism 6 in a vehicle seat device capable of changing its posture between an in-use posture and a retracted posture housed in a housing recess 22 provided on the floor surface 21 of the vehicle body. 8, a first force is stored when the seat 2 is rotated from the use posture to the storage posture side, and is assisted by the restoring force when the seat 2 is rotated from the storage posture to the use posture side.
The spiral spring 13 and the above-mentioned spiral spring 13 accumulates power when the seat 2 is rotated from the storage posture to the use posture, and assists this by the restoring force when the seat 2 is rotated from the storage posture to the storage posture. The second spiral spring 14 is provided.

According to a second invention of the present application, in the vehicle seat device according to the first invention, the rotation from the use posture to the storage posture side in which the assisting action of the first spiral spring 13 is performed. At the beginning of the operation, the second spiral spring 1 described above is used.
4, the second spiral spring 14 is not operated.
It is characterized in that the accumulating action by the first spiral spring 13 is not performed at the initial stage of the turning operation from the storage posture to the use posture side in which the assisting action is performed.

[0009]

According to the present invention, the following effects can be obtained by adopting such a configuration.

According to the vehicle seat device of the first invention of the present application, the seat 2 is rotatably supported to the vehicle body floor surface 21 side via the rotation support mechanism 6 having the fulcrum shaft 8.
In the vehicle seat device, the posture can be changed between a use posture taken out on the vehicle body floor surface 21 and a storage posture stored in a housing recess 22 provided in the vehicle body floor surface 21. A force is stored on the fulcrum shaft 8 of the dynamic support mechanism 6 when the seat 2 is rotated from the in-use posture to the storage posture, and is restored when the seat 2 is rotated from the storage posture to the use posture. The first spiral spring 13 which assists this by
And a second spiral that stores the force when the seat 2 is rotated from the storage posture to the use posture, and assists this by the restoring force when the seat 2 is rotated from the use posture to the storage posture side. And a spring 14.

Therefore, according to the vehicle seat device of the present invention, during the pivoting operation from the storage posture to the use posture side, the force is accumulated during the previous pivoting operation from the use posture to the storage posture side. Further, the restoring force of the first spiral spring 13 assists this, and at the same time, the second spiral spring 14 exerts a force accumulation action. Therefore, the rotational operation force of the seat 2 from the storage posture to the use posture is reduced by the amount assisted by the restoring force of the first spiral spring 13, and the operability can be improved by a light operation. On the other hand, due to the rotation restraining action of the fulcrum shaft 8 due to the accumulating action of the second spiral spring 14, the accelerated turning of the seat 2 toward the in-use posture is restrained, and the operational safety is ensured. Is secured.

Further, in the pivoting operation from the use posture to the storage posture side, the restoring force of the second spiral spring 14 accumulated during the previous pivoting operation from the storage posture to the use posture side. This is assisted by this, and at the same time, a force-accumulating action is performed in the first spiral spring 13. Therefore, the rotational operation force of the seat 2 from the use posture to the storage posture is
The amount of assistance by the restoring force of the second spiral spring 14 is reduced, and the operability can be improved by a light operation, while the rotation of the fulcrum shaft 8 associated with the force accumulation action of the first spiral spring 13 is increased. Due to the motion suppressing action, excessive rotation of the seat 2 toward the storage posture is suppressed, and operational safety is ensured.

As described above, in the vehicle seat device according to the present invention, the assisting action of the first and second spiral springs 13 and 14 reduces the operation force to improve the operability, and at the same time, the respective spiral springs. The operational safety is improved by the action of suppressing the rotation of the fulcrum shaft 8 due to the accumulated forces of 13 and 14.

According to the vehicle seat apparatus of the second invention of the present application, in the vehicle seat apparatus of the first invention, from the in-use posture in which the assisting action of the first spiral spring 13 is performed. In the initial stage of the rotation operation to the storage posture, the second spiral spring 14 does not store the force, but the second spiral spring 14 assists the storage posture. Since the force is not stored by the first spiral spring 13 in the initial stage of the pivoting movement to the storage position, the initial rotation and the use posture from the storage posture to the use posture side are performed. At the initial stage of the rotation from the retracted posture to the storage posture, that is, at the stage where a large rotation operation force is required, the assisting action by the restoring force of the first spiral spring 13 or the second spiral spring 14 causes the second spiral spring 13 or the second spiral spring 14 to operate. Storage of spiral spring 14 or first spiral spring 13 It is not reduced by the force action, the assisting action by the restoring force of the first spiral spring 13 or the second spiral spring 14 is more efficiently performed, and further improvement in operability can be expected.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be specifically described below based on preferred embodiments.

FIG. 1 shows a vehicle seat device 1 according to an embodiment of the present invention. This seat device 1 is
The seat back 4 is applied as a second-row or third-row seat, and is connected to a seat cushion 3 and a rear end portion of the seat cushion 3 via a pair of left and right hinges 5 and 5 so that the seat back 4 can be erected. The seat 2 including the seat cushion 3 is attached to the floor surface 21 of the vehicle body via a pair of left and right rotation support mechanisms 6 and 6 arranged at both left and right end portions near the rear end of the seat cushion 3.

As shown in FIG. 2, the seat 2 is in a folded posture in which the seat back 4 is folded above the seat cushion 3, and the pair of left and right rotation support mechanisms 6 and 6 will be described later. With the fulcrum shafts 8 and 8 as rotation centers, a rotation position A shown by a chain line and a rotation position D shown by a solid line in FIG.
Between them is rotatable in the arrow LR direction.

The turning position A is a turning position where the seat 2 is stored in a storage recess 22 formed in the floor surface 21 of the vehicle body. It is called the "posture when stored." On the other hand, the rotation position D
Is a rotational position in which the seat 2 is installed on the floor surface 21 of the vehicle body and is fixed by the lock mechanism 18, and this is a pivotal position at which the seat 2 can be used as a seat. Attitude ”.

Further, the turning position B and the turning position C, which are shown by chain lines in the figure, are transitional positions intermediate between the turning position A and the turning position D. Then, at the turning position B, the horizontal distance between the fulcrum shaft 8 which is the turning center and the position of the center of gravity of the seat 2 becomes maximum, and the rotation moment due to the weight of the seat 2 becomes maximum. At the rotation position C, the fulcrum shaft 8 as the rotation center and the center of gravity of the seat 2 are located on the same vertical line, and the rotation moment due to the weight of the seat 2 becomes zero.

That is, during the take-out operation for rotating the seat 2 from the storage posture (rotational position A) to the use posture (rotational position D), between the rotation position A and the rotation position C. After a rotational moment in the direction of rotating the seat 2 in the direction of the arrow R acts, its magnitude gradually increases from the rotational position A to the rotational position B, and becomes maximum at the rotational position B. , Gradually decreases from the rotation position B to the rotation position C, and reaches zero at the rotation position C. Further, between the rotation position C and the rotation position D, the seat 2
Is applied in the direction of the arrow L, and its magnitude gradually increases from the rotation position C to the rotation position D, and reaches its maximum at the rotation position D. Therefore, between the rotational position A and the rotational position C, an operation force is applied in the direction of pulling up the seat 2 against the rotational moment due to its own weight, while between the rotational position C and the rotational position D, the sheet is moved. 2 is automatically rotated by the rotation moment.

Similarly, during the storage operation for rotating the seat 2 from the use posture (rotational position D) to the storage posture (rotational position D), between the rotation position C and the rotation position D. Causes a rotational moment in the direction of rotating the seat 2 in the direction of the arrow L, the magnitude of which gradually decreases from the rotational position D to the rotational position C, and becomes zero at the rotational position C. Further, between the rotation position C and the rotation position A, a rotation moment in the direction of rotating the sheet 2 in the direction of the arrow R acts, and its magnitude gradually increases from the rotation position C to the rotation position B. After increasing and reaching the maximum at the turning position B, it gradually decreases from the turning position B to the turning position A. Therefore, between the rotation position D and the rotation position C, the seat 2 is resisted against the rotation moment due to its own weight.
While an operating force is applied in the direction of pulling up the sheet 2, the seat 2 is automatically rotated by the rotational moment between the rotational position C and the rotational position A.

As described above, the turning operation of the seat 2 between the in-use posture and the stowed posture is performed by the rotational moment and the operating force of the seat 2 due to its own weight. However, during the turning operation of the seat 2 by the operation force (that is, the operation between the turning position A and the turning position C in the taking-out operation, and the operation between the turning position D and the turning position C in the storing operation). As described above, it is necessary to apply a large operating force capable of rotating the rotating moment against the rotating moment due to its own weight, which is a heavy burden on the operator and is not preferable in terms of operability. .

Further, when the seat 2 is rotated by a rotation moment due to its own weight (that is, the rotation between the rotation position C and the rotation position D in the take-out operation, and the rotation position C in the storage operation). For the rotation between positions A), the rotation is normally performed while applying a restricting force in a direction in which the rotation is suppressed (that is, while controlling the rotation speed). As described above, in the case where the seat 2 is lost, the restriction force disappears, so that the seat 2 rapidly rotates and the operational safety may be impaired.

Therefore, in the seat device 1 of this embodiment, the present invention is applied to the structure of the rotation support mechanism 6 and the like, as described below, in order to improve the above problems. The structure and the like of the rotation support mechanism 6 will be specifically described below.

In FIG. 3, the left and right of the seat 2 of the pair of left and right rotation support mechanisms 6 and 6 respectively arranged on the lower surface sides of the left and right end portions of the rear end portion of the seat cushion 3. The rotation support mechanism 6 is shown. In the figure, reference numeral 7 is a support arm having a fulcrum shaft 8 fixed to the tip thereof, and the support arm 7 is an end of the seat cushion 3 with the axis of the fulcrum shaft 8 oriented in the seat width direction. It is fixed to the bottom of the part. Reference numeral 10 is a fixing bracket fixed to the floor surface 21 of the vehicle body. The side walls 10a and 10a facing each other with a predetermined space each have a shaft hole 11 formed therein, and a position separated from the shaft hole 11 by a predetermined space. A pin-shaped spring receiver 12 is attached across the pair of side walls 10a, 10a.

Further, a belt anchor 16 having a shaft hole 15 and a first spiral spring 13 are arranged between the pair of side walls 10a, 10a of the fixing bracket 10. The belt anchor 16 is connected to the fixed bracket 10 side by inserting the fulcrum shaft 8 into the shaft hole 15.

The first spiral spring 13 is attached to the fulcrum shaft 8 side by inserting and fixing the winding inner end 13a in the slit groove 9 provided in the fulcrum shaft 8 and at the same time, The turning side end 13b is hooked on the spring receiver 12. In this case, when the first spiral spring 13 is attached to the fulcrum shaft 8, the winding direction is from the winding inner end 13a to the winding outer end when viewed from the axial outer side of the fulcrum shaft 8. The mounting direction with respect to the fulcrum shaft 8 is set so as to be counterclockwise toward 13b. Therefore, in the first spiral spring 13, the seat 2 has the fulcrum shaft 8
When rotating in the direction of arrow R with the center of rotation as the center of rotation, the force is accumulated to generate a restoring force in the direction of arrow L by displacement in the direction of diameter reduction.

On the other hand, FIG. 4 shows the seat cushion 3 described above.
Of the pair of left and right rotation support mechanisms 6 and 6 respectively arranged on the lower surface sides of the left and right end portions of the rear end portion, the rotation support mechanism 6 arranged on the right side of the seat 2 is shown. Similarly to the above-described rotation support mechanism 6 arranged on the left side, this rotation support mechanism 6 has a fulcrum shaft 8 attached to the seat cushion 3 via a support arm 7, and the fulcrum shaft 8 is fixed to the fixed bracket 10. By being supported, it is rotatably supported on the floor surface 21 side of the vehicle, and a second spiral spring 14 is provided between the fulcrum shaft 8 and the fixed bracket 10.

The second spiral spring 14 is attached to the fulcrum shaft 8 side by inserting and fixing the winding inner end 14a into the slit groove 9 provided on the fulcrum shaft 8 and the winding outer side thereof. The end 14b can be selectively engaged with the spring receiver 12 (described later). Further, when the second spiral spring 14 is attached to the fulcrum shaft 8, when viewed from the axial outer side of the fulcrum shaft 8, the winding direction is from the inner winding end 14a to the outer winding end 14b. The mounting direction with respect to the fulcrum shaft 8 is set so as to be counterclockwise toward. Therefore, the second spiral spring 14 should be displaced in the diameter reducing direction and generate a restoring force in the arrow R direction when the seat 2 rotates in the arrow L direction with the fulcrum shaft 8 as the rotation center. It will save energy.

It should be noted that the force accumulation action of the second spiral spring 14 is not performed in the entire range of rotation in the arrow L direction, but the force accumulation action is performed only at the final stage of rotation in the arrow L direction. Is configured. Specifically, a predetermined play is provided between the spring receiver 12 and the winding outer end 14b of the second spiral spring 14, and the seat 2 rotates as shown in FIGS. 5 and 6. The second spiral spring is such that the outer winding end 14b is hooked on the spring receiver 12 only in the position C and the rotating position D, and is not hooked in the other rotating positions. The relative position with respect to the spring receiver 12 in the winding direction of 14 is set.

Next, the operation, function and effect of the seat device 1 will be described with reference to FIGS. 2 and 5-12.

5 to 8 show the operating states of the first spiral spring 13 and the second spiral spring 14 during the retracting operation, and FIG. 5 shows the seat 2 in the rotating position. 6 is when the seat 2 is in the rotation position C, FIG. 7 is when the seat 2 is in the rotation position B, and FIG. 8 is when the seat 2 is in the rotation position A. Shows the state of.

9 to 12 show the operating states of the first spiral spring 13 and the second spiral spring 14 during the take-out operation. In FIG. 9, the seat 2 is in the rotating position. When the seat 2 is in the A position, the seat 2 shown in FIG.
11 is when the seat 2 is in the rotation position C, and FIG. 12 is when the seat 2 is in the rotation position D.
Shows the state of.

First, the operation during the storing operation of rotating the seat 2 from the in-use posture to the stored posture will be described.
In this case, as shown in FIGS. 5 and 6, the restoring force F of the second spiral spring 14 accumulated during the previous take-out operation.
The rotation operation is assisted by Rb ₁ and the restoring force FRb ₂ ,
The amount of the assisting force on the operator is reduced by this amount of assistance, and the operation can be performed lightly. Further, when the seat 2 exceeds the rotation position C, a rotation moment due to the weight of the seat 2 acts in the rotation direction and tends to be accelerated, but the range from the rotation position C to the rotation position A is increased. In the above, the first spiral spring 13 performs a force-accumulating action, and the rotation suppressing action associated with this force-accelerating action suppresses the accelerated rotation of the seat 2 toward the stored posture, and the seat 2 Is the rotation position A
It will be positioned quietly in the area, ensuring its operational safety.

On the other hand, the operation during the take-out operation of rotating the seat 2 from the storage posture to the use posture,
In this case, as shown in FIGS. 9 to 11, the restoring force F of the first spiral spring 13 accumulated during the previous storing operation.
The rotation operation is assisted by La ₁ to the restoring force FLa ₃ , and the operating force burden on the operator is reduced by this assisting force, and the operation can be performed lightly. In addition, the seat 2 is in the rotation position C.
If it exceeds, the rotational moment due to the weight of the seat 2 tends to act in the rotational direction to accelerate the rotational moment, but in the range from the rotational position C to the rotational position D, the second moment
The spiral spring 14 of FIG. 4 stores a force, and the rotation restraining action associated with this force restrains the seat 2 from acceleratingly turning to the posture position during normal use, so that the seat 2 is rotated. D
It will be positioned quietly in the area, ensuring its operational safety.

Thus, the seat device 1 of this embodiment
In the above, the operating force is reduced by the assisting action of the first and second spiral springs 13 and 14 to improve its operability, and the fulcrum shaft 8 rotates due to the accumulated force of each spiral spring 13 and 14. The restraining action improves the operational safety.

Further, in the seat device 1 of this embodiment, as shown in FIGS. 9 to 12, in the initial stage of the take-out operation which requires the assisting action of the first spiral spring 13 most, The second spiral spring 14 acting so as to reduce the assisting effect of the first spiral spring 13 is configured not to be stored, and as shown in FIGS. In the initial stage of the storing operation that most requires the assisting action of the second spiral spring 14, the first action acting in the direction of reducing the assisting action of the second spiral spring 14 is performed.
The spiral spring 13 is configured so as not to perform a force accumulation action. Therefore, the assisting action of the first spiral spring 13 at the time of taking out operation and the assisting action of the second spiral spring 14 at the time of storing operation are efficiently performed, and further improvement of operability can be expected. .

[Brief description of drawings]

FIG. 1 is a front view of a vehicle seat device according to an embodiment of the present invention.

FIG. 2 is an enlarged side view showing a storing / removing operation of the seat device shown in FIG.

FIG. 3 is an exploded perspective view of a left rotation support mechanism of the seat device.

FIG. 4 is an exploded perspective view of a right rotation support mechanism of the seat device.

FIG. 5 is an explanatory diagram of an operating state of the rotation support mechanism during a storage operation.

FIG. 6 is an explanatory diagram of an operating state of the rotation support mechanism during a storage operation.

FIG. 7 is an explanatory diagram of an operating state of the rotation support mechanism during a storage operation.

FIG. 8 is an explanatory diagram of an operating state of the rotation support mechanism during a storage operation.

FIG. 9 is an explanatory diagram of an operating state of the rotation support mechanism during a take-out operation.

FIG. 10 is an explanatory diagram of an operating state of the rotation support mechanism at the time of taking out operation.

FIG. 11 is an explanatory diagram of an operating state of the rotation support mechanism at the time of taking out operation.

FIG. 12 is an explanatory diagram of an operating state of the rotation support mechanism during a take-out operation.

[Explanation of symbols]

1 is a seat device, 2 is a seat, 3 is a seat cushion,
4 is a seat back, 5 is a hinge, 6 is a rotation support mechanism, 7
Is a support arm, 8 is a fulcrum shaft, 9 is a slot groove, 10 is a fixed bracket, 11 is a shaft hole, 12 is a spring receiver, 13 is a first spiral spring, 14 is a second spiral spring, and 15 is a shaft hole. , 16 is a belt anchor, 17 is a cover, 18 is a locking mechanism, 2
Reference numeral 1 is a floor surface of a vehicle body, 22 is a housing recess, and A to D are rotational positions when a seat is stored and taken out.

Claims (2)

[Claims] 1. A seat (2) is rotatably supported to a vehicle body floor surface (21) side through a rotation support mechanism (6) having a fulcrum shaft (8), and the vehicle body floor surface (21) is supported. ) The posture at the time of use taken out above and the housing recess (2) provided on the floor surface (21) of the vehicle body
2) A vehicle seat device capable of changing its posture between the stored posture and the stored posture, wherein the fulcrum shaft (8) of the rotation support mechanism (6) is provided with the seat (2). A first spiral spring (13) that stores a force during the pivoting operation from the use posture to the storage posture side and assists this by the restoring force during the pivoting operation from the storage posture to the use posture side; A second spiral that stores the force when the seat (2) is rotated from the storage posture to the use posture, and assists it by the restoring force when the seat (2) is rotated from the use posture to the storage posture. A vehicle seat device comprising a spring (14). 2. The second spiral spring (1) according to claim 1, wherein the second spiral spring (13) is initially provided during the pivoting operation from the in-use posture to the storage posture in which the assisting action of the first spiral spring (13) is performed. 14) in which the force-accumulation action is not performed, and the assist action is performed by the second spiral spring (14), in the initial stage of the rotation operation from the storage posture to the use posture side, the first spiral spring ( 13) A vehicle seat device, characterized in that it is configured so that the force-accumulating action by 13) is not performed.