JP2002019505A - Seat reversing operation structure for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the operability in reversing and oscillating a seat between a working position and a storing position, and improve the effect of a torsional coil spring regardless of its operating direction while improving the durability of the torsional coil spring. SOLUTION: In this seat reversing operation structure for a vehicle where the seat 3 is installed reversibly and oscillatably on its spindle 11 over the working position P1 and the storing position P2, a spare shaft 14 independent from the spindle 11 is mounted on a shaft center X same as that of the spindle 11, and the torsional coil spring 16 is externally fitted to the auxiliary shaft 14 to form a force accumulating mechanism A to accumulate the energizing force for oscillating and energizing the seat 3 to the storing position P2 in accompany with the oscillating operation of the seat 3 to the working position P1, and accumulate the energizing force for oscillating and energizing the seat 3 toward the working position P1 in accompany with the oscillating operation of the seat 3 to the storing position P2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat reversing operation structure for a vehicle equipped with a seat which is rotatable around a support shaft between a use position and a storage position.

[0002]

2. Description of the Related Art Conventionally, as a seat reversing operation structure for a vehicle as described above, for example, as disclosed in Japanese Patent Application Laid-Open No. Hei 6-320993, a seat is supported on a support shaft for reversing and swinging. When a torsion coil spring that oscillates from the use position to the upright position in the middle of reversing is fitted around the torsion coil spring, the urging force is applied when the seat is erected from the use position to the upright position in the middle of reversing. Utilizing it as an assist force improves the operability when performing a reversing swing operation from the use position to the storage position. A torsion coil spring that oscillates toward the upright position from the outside is fitted to the support shaft, and the urging force is used to assist the upright swing operation from the retracted position to the upright position in the middle of reversing the sheet. Use as And in toward the use position of the sheet from the storage position there is that so as to improve the operability in reversing pivoted.

[0003]

However, according to the above-mentioned prior art, when the sheet is reversed and rocked in a direction in which the urging force of the torsion coil spring can be used as the assist force, the sheet is weighted by the urging force. Because it can reduce the labor required when standing up and swinging against
Although it is possible to improve the operability when performing the reversing rocking operation of the seat, when the reversing rocking of the seat is performed in a direction in which the biasing force of the torsion coil spring cannot be used as the assist force, the seat stands upright against its weight. Since it is not possible to reduce the labor required for moving the seat, there is room for improvement in improving the operability when performing the reversing swing operation of the seat in that direction.

Further, according to the above-mentioned prior art, a torsion coil spring is externally fitted and supported on a support shaft having a shaft diameter set so as to obtain a necessary supporting strength for supporting the sheet in a reversible swinging manner. The coil diameter of the torsion coil spring is now dependent on the shaft diameter of the support shaft set according to the required support strength, whereby the coil diameter is determined by the weight of the seat and the position of the center of gravity. It is difficult to set the coil diameter to the originally required coil diameter for obtaining the assist force, and there is room for improvement in further improving the operability when performing the reversing swing operation of the seat.

Further, according to the above prior art, the length of the torsion coil spring is restricted by the length of the support shaft since the torsion coil spring is externally fitted to the support shaft of the seat. It has been difficult to increase the number of turns of the torsion coil spring to improve the durability.

SUMMARY OF THE INVENTION It is an object of the present invention to improve the operability when the sheet is inverted and swung over a use position and a storage position.
An object of the present invention is to improve the durability of a torsion coil spring while effectively improving the durability regardless of the operation direction.

[0007]

[Means for Solving the Problems] [Structure] In order to achieve the above object, according to the first aspect of the present invention, the seat is turned over around its support axis over a use position and a storage position. In the seat reversing operation structure of a vehicle equipped so as to be swingable, a spare shaft separate from the support shaft is disposed coaxially with the support shaft, and a torsion coil spring is fitted around the spare shaft.
Accumulating an urging force for swinging the sheet toward the storage position in accordance with the swing operation of the sheet to the use position, accumulating an urging force of the sheet in accordance with the swing operation of the sheet to the storage position. Is configured to accumulate an urging force for oscillating toward the use position.

According to the first aspect of the present invention, when the sheet is turned in the reverse direction from the use position to the storage position, the power storage mechanism accompanies the rocking operation of the sheet to the use position. The biasing force accumulated in the seat can be used as an assisting force when the seat is uprightly swung from the use position to the standing position in the middle of reversing against the weight of the sheet, and conversely, the sheet is stored in the storage position. When the reversing swing operation is performed from the storage position to the use position, the urging force accumulated in the storage mechanism due to the swing operation to the storage position of the sheet is reversed from the storage position against the weight of the sheet against the weight. It can be used as an assist force when performing the upright swing operation toward the upright position in the middle. As a result, when performing the reverse swing operation of the seat between the use position and the storage position, in the operation direction, Regardless of the operation required, It becomes so that.

In addition, since the torsion coil spring is externally fitted and supported on a spare shaft separate from the support shaft, the torsion coil spring is firstly provided with an appropriate assisting force determined from the weight of the seat and the position of the center of gravity. After setting the coil diameter of the torsion coil spring and setting the length of the torsion coil spring to obtain the number of turns determined from the required durability, the shaft diameter and length of the spare shaft that externally supports the torsion coil spring Can be set,
Since there is no inconvenience that the coil diameter and length of the torsion coil spring are affected by the shaft diameter and length, it is possible to reliably obtain the assist force and the desired durability more suitable for the seat to be equipped.

[Effect] Therefore, by attaching the torsion coil spring to the spare shaft on the coaxial center separately from the support shaft of the seat, the assisting force and the durability that require the coil diameter and length of the torsion coil spring are required. The size of the torsion coil spring can be set arbitrarily so that the reversing swing operation between the use position and the storage position of the seat can be performed irrespective of the operation direction. Thus, the operability when the sheet is reversed and swung over the use position and the storage position can be effectively improved irrespective of the operation direction while improving the durability of the seat.

[Structure] According to a second aspect of the present invention, in the first aspect of the present invention, a longitudinal direction of the spare shaft is provided with both ends of the torsion coil spring along the spare shaft. At the time of power storage of the power storage mechanism,
One of the two end portions is a fixed portion that is received and supported by a stopper fixedly mounted on the vehicle body side, and the other is a controlled portion that is operated by a movable piece that is integrally swingably mounted on the seat side. did.

According to the second aspect of the present invention, the torsion coil spring which becomes the fixed portion or the operated portion at the time of the accumulation of power extends in the longitudinal direction of the spare shaft with both end portions thereof being along the spare shaft. Therefore, the height of the torsion coil spring can be reduced as compared with the case where both ends extend in the direction perpendicular to the spare shaft, and the bulkiness of the energy storage mechanism in the height direction can be suppressed. Therefore, the energy storage mechanism can be arranged under the seat without inconvenience of increasing the seat position.

In addition, the garnish that covers the energy storage mechanism, which is generated when the energy storage mechanism is disposed laterally outside the sheet, unnecessarily narrows the width of the sheet by the energy storage mechanism. It is possible to avoid inconveniences such as the necessity of being separately required and the limitation of the length of the torsion coil spring, thereby improving the sitting comfort and simplifying the configuration while improving the durability of the torsion coil spring. Can be planned.

[Effect] Therefore, by devising the shape of both ends of the torsion coil spring, the energy storage mechanism can be rationally arranged. As a result, the torsion coil spring can be seated while improving the durability. It has become possible to improve the comfort and simplify the configuration.

[Structure] In the invention according to claim 3 of the present invention, in the invention according to claim 1 or 2, in the first operation area on the use position side of the swing operation area of the seat. One end of the torsion coil spring becomes a fixed portion that is received and supported by a stopper fixedly mounted on the vehicle body side,
A second operation area on the storage position side of the swing operation area of the seat so that the other end is an operated section operated by a movable piece integrally swingably mounted on the seat side. In the above, one end of the torsion coil spring is configured to be the operated portion and the other end is configured to be the fixed portion.

According to the third aspect of the invention, in the first operation area on the use position side, one end of the torsion coil spring is received and supported by the stopper, and the other end of the torsion coil spring swings. By interlocking with the moving operation, the urging force for swinging the sheet toward the storage position is accumulated,
Conversely, in the second operation area on the storage position side, the other end is received and supported by the stopper, and one end is linked with the swinging operation of the seat, so that the seat is swung toward the use position. It will accumulate the energizing force.

That is, in accordance with the operation area of the seat, a single torsion coil spring biases the seat toward the retracted position and a biasing force that swings the seat toward the use position. Can be stored, so that it is possible to avoid complication of the configuration and increase in manufacturing cost due to the provision of a dedicated torsion coil spring.

[Effects] Therefore, the operability when the sheet is inverted and swung over the use position and the storage position can be effectively improved regardless of the operation direction, but the structure is simplified. In addition, the manufacturing cost can be reduced.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a passenger compartment 1 of a passenger car. In this compartment 1, two separate seats 2 for a driver and a passenger are provided in front of the passenger compartment. And a bench-type seat 3 behind them
Is arranged as a rear seat, thereby forming a living room 1A, and a luggage room 1B is formed behind the living room 1A so as to communicate therewith.

As shown in FIGS. 1 to 3, the rear seat 3 is
By connecting a pair of left and right seat backs 6 to the rear of the seat cushion 4 via a reclining mechanism 5, a reclining operation to a desired position of the independent seat back 6 and a folding operation to a forward leaning position can be performed independently for each seating position. It is configured as follows. In the seat cushion 4, connection brackets 8 provided on the left and right sides of the front end of the cushion frame 7 are connected to a pair of left and right front legs 10 extending from a floor 9 of the vehicle body via left and right support shafts 11. Accordingly, the rear seat 3 is stored in the storage position 9A formed by using the use position P1 where the seat can be seated on the seat cushion 4 and the floor portion located between the front and rear seats 2 and 3. Over the storage position P <b> 2, it is possible to reciprocate around the support shaft 11.

Reference numeral 12 shown in FIG. 2 denotes a striker extending from the rear bottom surface of the seat cushion 4 so as to fix the rear seat 3 at the use position P1 by engaging with a lock mechanism 13 embedded in the floor 9. It is.

With the above configuration, the striker 12 for folding the seat back 6 of the rear seat 3 fixed at the use position P1 to the forwardly inclined position (see FIG. 2A) and fixing the rear seat 3 at the use position P1 is provided. The rear seat 3 can be seated by releasing the engagement with the lock mechanism 13 and reversingly swinging the rear seat 3 from the use position P1 toward the storage position P2 (see FIGS. 2B and 2C). A part of the living room 1A provided in the luggage room 1B can be used for the luggage room 1B.

As shown in FIG. 3, the rear seat 3 accumulates a biasing force for swinging the rear seat 3 toward the storage position P2 in accordance with the swing operation of the rear seat 3 to the use position P1. 3 is provided with a pair of left and right energy storage mechanisms A for accumulating an urging force for urging the rear seat 3 to swing toward the use position P1 in accordance with the swing operation of the rear seat 3 to the storage position P2. When the reverse swing operation is performed from the use position P1 toward the storage position P2, the urging force accumulated in the energy storage mechanism A due to the swing operation of the rear seat 3 toward the use position P1 is applied to the rear seat 3, It can be used as an assist force when performing the upright swing operation from the use position P1 to the upright position P0 in the middle of reversing against the weight, and conversely, the rear seat 3 is moved from the storage position P2 to the use position P
When the reverse swing operation is performed toward the storage position 1, the urging force accumulated in the power storage mechanism A due to the swing operation of the rear seat 3 to the storage position P2 is applied to the rear seat 3 against the weight thereof. It can be used as an assist force when performing the upright swing operation from P2 toward the upright position P0 (see FIG. 2).

That is, when the rear seat 3 is operated to be inverted and swung over the use position P1 and the storage position P2, the labor required for the operation can be reduced irrespective of the operation direction. The operability at the time of performing the reverse swing operation of the rear seat 3 can be improved.

As shown in FIGS. 3 to 5, the left and right power storage mechanisms A
Is disposed between the cushion frame 7 and the corresponding one of the left and right front legs 10, and its configuration will be described in detail below.

As shown in FIGS. 3 to 6, on the inner wall 10A of each of the left and right front legs 10, a left-right auxiliary shaft 14 disposed on the coaxial center X with the support shaft 11 is provided inside the rear seat 3. The support bracket 15 fixedly equipped in a state extending toward is connected by bolts. The left and right ends 16 </ b> A, 16 </ b> B of each spare shaft 14 are arranged along the spare shaft 14.
A torsion coil spring 16 formed in a straight-raised shape extending in the longitudinal direction is externally fitted, and a first stopper 17 for receiving and supporting the left end 16A of the torsion coil spring 16 from below at the front of the spare shaft 14. And a second stopper 18 for receiving and supporting the right end 16B of the torsion coil spring 16 from above at the front of the auxiliary shaft 14.

On the other hand, at the front end of the cushion frame 7, the rear seat 3 is
And a pair of left and right first movable pieces 1 that swing together around the support shaft 11
9 and a second movable piece 20, and a pair of left and right support arms 21 that support the inner ends of the corresponding spare shafts 14 in a state capable of swinging relative to the spare shafts 14. The left and right first movable pieces 19 are used to swing the rear seat 3 in the first operation area a1 on the use position P1 side between the use position P1 and the standing position P0 of the swing operation area a of the rear seat 3. Along with the left end 16 of the corresponding torsion coil spring 16
A is operated around the support shaft 11, and the left and right second movable pieces 20 are moved to the storage position P2 side of the swing operation area a of the rear seat 3 between the storage position P2 and the standing position P0. 2
The right end portion 16B of the corresponding torsion coil spring 16 is arranged to be operated around the support shaft 11 in accordance with the swing operation of the rear seat 3 in the operation area a2.

With the above configuration, each torsion coil spring 16
In the state where the rear seat 3 is located at the use position P1 as shown in FIG. 2A, the right end portion 16B thereof is in contact with the vehicle body side as shown in FIG. 4, FIG. 5 and FIG. The second stopper 18 of the auxiliary shaft 14 is received and supported at a reference position p0 corresponding to the standing position P0 of the rear seat 3, and the left end 16A is moved to the use position P1 of the rear seat 3 by the first movable piece 19 on the rear seat 3 side. The state is switched to the twisted state operated to the corresponding first operation position p1, and in the state where the rear seat 3 is located at the standing position P0 as shown in (b) of FIG. 2, as shown in (b) of FIG. The left end 16A is the first stopper 17 of the spare shaft 14.
2 and the right end 16B is switched to the untwisted state in which the right end 16B is received and supported at the reference position p0 by the second stopper 18 of the spare shaft 14, and as shown in FIG. 6 is located at the storage position P2, as shown in FIG.
And the right end portion 16B is moved by the second movable piece 20 on the rear seat 3 side to the second operation position p2 corresponding to the storage position P2 of the rear seat 3.
It can be switched to the twisted state that has been operated.

That is, the spare shaft 14, the torsion coil spring 1
6, the first stopper 17, the second stopper 18, the first movable piece 19, the second movable piece 20, and the like constitute left and right power storage mechanisms A.

From this configuration, each of the left and right power storage mechanisms A
When the rear seat 3 is rocked in the first operation area a1 on the use position P1 side, the right end portion 16B of each torsion coil spring 16 becomes a fixed portion received and supported by the second stopper 18 of the spare shaft 13, Since the left end portion 16A is an operated portion operated by the first movable piece 19 on the rear seat 3 side, the right and left torsion coil springs 16 accumulate an urging force for urging the rear seat 3 to swing toward the storage position P2. And the rear seat 3 is moved to the second position on the storage position P2 side.
When the swing operation is performed in the operation area a2, the left end portion 16A of each torsion coil spring 16 becomes a fixed portion received and supported by the first stopper 17 of the spare shaft 13, and the right end portion 16B
Becomes the operated portion operated by the second movable piece 20 on the rear seat 3 side, so that the left and right torsion coil springs 16 accumulate the urging force for urging the rear seat 3 to swing toward the use position P1. Switching, and as a result,
A dedicated torsion coil spring that accumulates a biasing force for swinging the rear seat 3 toward the use position P1 and a dedicated torsion coil spring for accumulating a biasing force that swings the rear seat 3 toward the storage position P2. Compared with the case where the power storage mechanisms A on the left and right are provided, the configuration can be simplified and the manufacturing cost can be reduced.

Also, both ends 16 of each torsion coil spring 16
A and 16B are formed in a straight raised shape extending in the longitudinal direction of the spare shaft 14 along the spare shaft 14, so that, for example, both end portions 16 </ b> A and 16 </ b> B extend in a direction orthogonal to the spare shaft 14. As compared with the case where the torsion coil spring 16 is used, the height dimension of each torsion coil spring 16 can be reduced, and bulkiness in the height direction of the energy storage mechanism A can be suppressed. The power storage mechanism A can be disposed below the rear seat 3 without causing any inconvenience. As a result, for example, a problem occurs when the power storage mechanism A is disposed on the left and right sides of the rear seat 3. The left and right widths of the rear seat 3 are unnecessarily narrowed by the energy storage mechanism A, and a garnish that covers the energy storage mechanism A is separately required.
In addition, the length of the torsion coil spring 16 is restricted, and adverse effects such as durability of the torsion coil spring 16 can be avoided.

Incidentally, the rear seat 3 is attached to each support shaft 11.
A round bar having a shaft diameter that provides the necessary supporting strength for supporting the rocker in a reversible rocking manner is adopted, and each torsion coil spring 16 can obtain an appropriate assisting force according to the weight of the rear seat 3 and the like. A coil having a coil diameter and a length that can provide the required number of windings from the viewpoint of durability is adopted. Each spare shaft 14 has a shaft diameter and length suitable for supporting the torsion coil spring 16. Having a pipe material.

[Other Embodiments] Hereinafter, other embodiments of the present invention will be listed. The sheet 3 that is operated to be inverted and rocked may be of a separate type. A single power storage mechanism A may be provided on the seat 3 that is operated to be inverted and rocked. The auxiliary shaft 14 is fixedly mounted on the seat 3 side so as to be located on the coaxial center X with the support shaft 11, and the auxiliary shaft 14 is pivoted with the swing of the seat 3 around the support shaft 11. X, and one end 16 of a torsion coil spring 16 externally fitted to the spare shaft 14 is attached to the spare shaft 14.
A is provided with a first movable piece 19 for operating A and a second movable piece 20 for operating the other end 16B of the torsion coil spring 16, and a first stopper for receiving and supporting one end 16A of the torsion coil spring 16 from the floor 9. 17 and torsion coil spring 16
And the second stopper 18 for operating the other end portion 16B of the power storage device may be extended to constitute the energy storage mechanism A. As the energy storage mechanism A, the use position P1 of the rear seat 3
A dedicated torsion coil spring 16 for accumulating an urging force for oscillating the rear seat 3 toward the storage position P2 in accordance with the swing operation of the rear seat 3 and a rear seat 3 in association with the swing operation of the rear seat 3 in the storage position P2. May be provided with a dedicated torsion coil spring 16 that accumulates an urging force to oscillate toward the use position P1.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a main part showing a passenger compartment of a passenger car;

FIG. 2 (a) A longitudinal side view of a main part showing a state where the seat is operated to a use position. (B) A longitudinal side view of a main part showing a state where the seat is operated to an upright position. Longitudinal side view of the main part showing the operated state

FIG. 3 is a partially cutaway plan view of a seat showing the configuration of the energy storage mechanism.

FIG. 4 is a front view of a main part showing the configuration of the energy storage mechanism.

FIG. 5 is a perspective view of a main part showing the configuration of the energy storage mechanism.

6A is a longitudinal sectional side view of a main part showing a state of storage of the power storage mechanism at a seat use position. FIG. 6B is a side view of a longitudinal section of a main part showing a state of storage of the power storage mechanism at a seat standing position. (C) A longitudinal sectional side view of a main part showing a state of power storage of the power storage mechanism at the seat storage position.

[Explanation of symbols]

 3 seat 11 support shaft 14 spare shaft 16 torsion coil spring 16A both ends 16B both ends 17 stopper 18 stopper 19 movable piece 20 movable piece A energy storage mechanism P1 use position P2 storage position X axis a a swing operation area a1 first operation area a2 Second operation area

Claims (3)

[Claims] 1. A seat reversing operation structure for a vehicle equipped with a seat capable of reversing and swinging around a support shaft between a use position and a storage position, wherein a spare shaft separate from the support shaft is supported by the support shaft. A torsion coil spring is externally fitted to the spare shaft, and the seat is biased toward the storage position in accordance with a swing operation of the seat to the use position. A vehicle having a power storage mechanism configured to accumulate an urging force for accumulating an urging force to oscillate the sheet toward the use position in accordance with a swing operation of the sheet to the storage position. Sheet reversing operation structure. 2. An end portion of the torsion coil spring extends in a longitudinal direction of the spare shaft in a state where the both end portions are along the spare shaft, and one of the two end portions is fixed to the vehicle body side when the energy storage mechanism stores energy. 2. The vehicle according to claim 1, wherein the fixed portion is received and supported by an installed stopper, and the other is set as an operated portion operated by a movable piece that is integrally swingably mounted on the seat side. Sheet reversing operation structure. 3. In the first operation area on the use position side of the seat swing operation area, one end of the torsion coil spring is a fixed portion that is received and supported by a stopper fixedly mounted on the vehicle body side, The other end is an operated part operated by a movable piece that is integrally swingably mounted on the seat side,
In a second operation area on the storage position side of the seat swing operation area, one end of the torsion coil spring is configured to be the operated section and the other end is configured to be the fixed section. The vehicle seat reversing operation structure according to claim 1 or 2.