JP5751838B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat in which a seat back can be moved forward and a seat cushion can be moved from a seating position to a storage position in front of a vehicle body.

2. Description of the Related Art Among vehicle seats, there is known a seat configured to fold a seat according to the use of the vehicle to secure a storage space and to load a load in the secured storage space.
When the vehicle seat is folded, first, the handheld operation portion provided on the seat cushion is lifted obliquely upward. By pulling up the hand-held operation unit, the seat cushion is guided to the storage mechanism and stored obliquely in the foot space.

Next, the lock release operation part of the reclining mechanism is operated to release the reclining mechanism from the locked state. The seat back is folded forward by releasing the reclining mechanism and the seat is folded.
Thus, by folding the sheet, a storage space for loading the luggage can be secured (see, for example, Patent Document 1).

However, the vehicle seat disclosed in Patent Document 1 needs to operate two operation units, that is, a hand-held operation unit and an unlock operation unit when folding the seat, and it takes time and effort to fold the seat.
As a countermeasure, there has been proposed a vehicle seat that can be folded only by unlocking the seat back by the seat back unlock operation section (see, for example, Patent Document 2).

According to the vehicle seat of Patent Document 2, after unlocking the seat back with the seat back unlock operation unit, the seat back is moved forward and the sliding pin of the unlock mechanism is moved toward the front of the vehicle body. .
When the sliding pin moves toward the front of the vehicle body, the sliding pin comes into contact with the rear end edge of the rotating piece. When the sliding pin comes into contact with the rear end edge of the rotating piece, the front portion of the rotating piece rotates downward, and the latch rotates in the unlocking direction to release the locked state with respect to the striker.

By releasing the locked state, the seat cushion is flipped up to the upright state.
In this state, the seat can be folded by tilting the seat back substantially horizontally.
As described above, the seat can be folded only by operating the unlocking operation portion of the seat back and moving the seat back forward, so that the seat can be folded without taking time and effort.

Japanese Patent No. 3922657 Japanese Patent No. 3942084

Here, for example, when a seat is kept in a use posture (sitting posture) and a load is loaded on the rear side of the vehicle body of the seat back in this state, the load moves forward of the vehicle body while the vehicle is running and It is possible to hit from behind.
When a load hits the seat back from the rear of the vehicle body, the seat back may move toward the front of the vehicle body.

By the way, the vehicle seat of Patent Document 2 is configured such that the slide pin of the lock release mechanism moves toward the front of the vehicle body by moving the seat back toward the front of the vehicle body.
For this reason, when a load hits the seat back from the rear of the vehicle body and the seat back moves toward the front of the vehicle, the sliding pin of the lock release mechanism moves toward the front of the vehicle to release the locked state of the seat cushion. There is a fear.

  It is an object of the present invention to provide a vehicle seat that can perform folding of a seat without taking time and can secure a locked state of a seat cushion when a load hits the seat back from the rear of the vehicle body. To do.

According to a first aspect of the present invention, there is provided a seat cushion, a seat back, a jumping mechanism that moves the seat cushion between a seating position and a storage position in front of the seating position, and the seat back is rotated around the vehicle body floor. A support mechanism that supports the seat cushion so that the seat back is tilted forward in a space after the seat cushion is flipped up, and the seat cushion can be held at the seating position. in the vehicle seat that includes a releasable seat cushion locking mechanism holding state of the seat cushion in the seat cushion locking mechanism is provided below the pivot axis of the seat back, falling forward of the seat back comprising a rotatable unlocking piece rearward of the seat back with the said unlocking The seating by is fixed to the seat back frame, and rotates in conjunction with the falling forward of the seat back pivots rearwardly of the seat back with the unlocking pieces falling forward of the seat back The holding state of the seat cushion at the position can be released.

  According to a second aspect of the present invention, the seat cushion locking mechanism includes an engagement piece that can be engaged with the unlocking piece, and the seat cushion is placed at the seating position by engaging the engagement piece with the unlocking piece. It is possible to hold the lock release piece, and the engagement with the engagement piece can be released by rotating the lock release piece to the rear of the seat back by a predetermined angle.

  According to a third aspect of the present invention, the seat cushion lock mechanism is returned to an engagement position where the engagement piece can be engaged with the lock release piece in a state where the engagement piece and the lock release piece are disengaged. It is characterized in that it is provided with a returning means.

  According to a fourth aspect of the present invention, the jump mechanism includes a biasing unit that biases the seat cushion toward the storage position.

According to a fifth aspect of the present invention, there is provided a seat back locking mechanism that locks the vicinity of the upper portion of the seat back to a vehicle body member when the seat back is in the standing position.
According to a sixth aspect of the present invention, the seat cushion includes a posture holding rod that allows the front portion of the seat cushion to swing in the vehicle body front-rear direction via the outer lower support shaft and the inner lower support shaft. The other end is locked to the seat cushion via a locking member.

In the invention according to claim 1, the seat cushion locking mechanism is provided below the pivot axis of the seat back, comprising a rotatable unlocking piece to the rear of the seat back with the falling forward of the seat back, the lock The release piece is fixed to the seat back frame, rotates in conjunction with the forward tilt of the seat back , and the lock release piece rotates to the rear of the seat back in accordance with the forward tilt of the seat back . The holding state of the seat cushion was released.

The seat cushion can be released from the seating position by rotating the lock release piece backward to release the holding state of the seat cushion.
In this manner, by operating the seat back forward, the seat cushion can be released from the seating position, so that the seat can be folded without taking time and effort.

Here, when a load hits the seat back from the rear of the vehicle body and the seat back moves toward the front of the vehicle, the unlocking piece moves toward the front of the vehicle along with the seat back.
Therefore, the lock release piece is rotated rearward of the seat back to release the locked state of the seat cushion lock mechanism.

That is, it is possible to prevent the seat cushion lock mechanism from releasing the locked state by preventing the unlocking piece from rotating to the rear of the seat back when the load hits from the rear of the vehicle and the seat back moves forward.
Therefore, when the luggage hits from the rear of the vehicle body and the seat back moves to the front of the vehicle body, the unlocking piece moves toward the front of the vehicle body and is in a state of being deeply engaged by the engagement piece.
As a result, the locked state of the seat cushion lock mechanism can be prevented and the locked state of the seat cushion can be secured.

In the invention which concerns on Claim 2, the engagement piece which can be engaged with a lock release piece was provided in the seat cushion lock mechanism. The lock release piece can be released from the engagement piece by rotating the lock release piece backward by a predetermined angle.
Thus, the seat cushion can be reliably released from the seating position by operating the seat back forward.

In the invention according to claim 3, the seat cushion lock mechanism is provided with the return means, and the engagement piece is returned to the engagement position by the return means.
Therefore, the engagement piece can be held in the engagement position when the seat cushion is returned to the seating position.
Thereby, the engagement piece can be engaged with the unlocking piece and the seat cushion can be held at the seating position by a simple operation of simply returning the seat cushion to the seating position.

In the invention according to claim 4, the urging mechanism includes the urging means, and the urging means urges the seat cushion toward the storage position.
Thus, the seat cushion can be moved to the storage position by the urging means only by operating the seat back forward to release the seat cushion from the seating position.

The invention according to claim 5 includes a seat back lock mechanism that locks the vicinity of the upper portion of the seat back to the vehicle body member.
By locking the vicinity of the upper portion of the seat back to the vehicle body member with the seat back lock mechanism, the seat back lock mechanism can be sufficiently separated from the rotation shaft.
As a result, the seat back can be suitably prevented from being tilted forward about the rotation axis by the seat back lock mechanism, and the seat cushion can be stably held at the seating position.
In the invention according to claim 6, the front portion of the seat cushion has a posture holding rod that allows the front portion of the seat cushion to swing in the longitudinal direction of the vehicle body via the outer lower support shaft and the inner lower support shaft. The other end is connected to the lower support shaft, and the other end is locked to the seat cushion via a locking member.
By providing the posture holding rod, the posture holding rod can hold the rear portion of the seat cushion in a floating posture.
As a result, when the seat cushion is moved between the seating position and the storage position by swinging the front leg about the inner and outer lower support shafts, the rear portion of the seat cushion can be held in a floating posture.

It is a side view which shows the vehicle seat which concerns on this invention. 1 is a perspective view showing a vehicle seat according to the present invention. It is a perspective view which shows the principal part of the vehicle seat which concerns on this invention. FIG. 4 is an enlarged view of part 4 of FIG. 3. FIG. 5 is an enlarged view of part 5 of FIG. 3. FIG. 6 is an enlarged view of 6 parts in FIG. 3. FIG. 7 is an enlarged view of part 7 of FIG. 3. FIG. 8 is an enlarged view of 8 parts in FIG. 3. FIG. 9 is a sectional view taken along line 9-9 in FIG. 8. It is a figure explaining the example which brings forward the seat back which concerns on this invention. It is a figure explaining the example which moves toward the seat cushion accommodation position which concerns on this invention. It is a figure which shows the state which folded the rear seat which concerns on this invention. It is a figure explaining the example which raises the seat back which concerns on this invention to a standing position. It is a figure explaining the example which returns the seat cushion which concerns on this invention to a seating position. It is a figure explaining the example which the engagement piece concerning this invention gets over a front-end | tip engagement rod, and hold | maintains an engagement piece in an engagement position. It is a figure explaining the example which hold | maintains the seat cushion which concerns on this invention in a seating position.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. Note that “front (Fr)”, “rear (Rr)”, “left (L)”, and “right (R)” follow the direction seen from the driver.

The vehicle seat 20 according to the embodiment will be described.
As shown in FIG. 1, the vehicle 10 is provided on the vehicle body floor 13 that forms the floor portion of the passenger compartment 12, the fuel tank 18 that is provided below the rear half floor portion 15 of the vehicle body floor 13, and the vehicle body floor 13. The vehicle seat 20 is provided.

The vehicle body floor 13 is formed in a state in which the rear half floor portion 15 is raised upward with respect to the front half floor portion 14, and is formed in a state in which the cargo compartment floor portion 16 is raised upward with respect to the rear half floor portion 15. Yes.
A fuel tank 18 is provided below the rear half floor portion 15.
The rear half floor portion 15 includes a seat support portion 15a that supports a rear seat 24 described later. The seat support portion 15a is secured by a support bracket (not shown).

  The vehicle seat 20 includes a driver seat 21 provided in the right half portion of the front half floor portion 14, a passenger seat 22 provided in the left half portion of the front half floor portion 14, and the driver seat 21 and the passenger seat 22. And a rear seat (seat) 24 provided at the rear of the vehicle body.

As shown in FIG. 2, the rear seat 24 includes a left rear seat 25 provided in a substantially left half portion of the rear half floor portion 15 and a right rear seat 26 provided in a substantially right half portion of the rear half floor portion 15. .
In addition, the same code | symbol is attached | subjected to each structural member which has a function equivalent to the left rear seat 25, and description of the right rear seat 26 is abbreviate | omitted.

  The left rear seat 25 includes a seat cushion 31 on which an occupant sits, a seat back 32 provided on the rear portion 31 a side of the seat cushion 31, and a pair of headrests 33 provided on a top portion 32 a of the seat back 32.

As shown in FIGS. 2 and 3, the seat cushion 31 includes a seat cushion frame 35 disposed substantially horizontally with respect to the vehicle body floor 13 and a cushion portion 41 supported by the seat cushion frame 35.
The seat cushion frame 35 includes a frame frame portion 36 formed in a substantially U-shape, a rear frame portion 37 spanned between the inner and outer base ends 36a of the frame frame portion 36, the frame frame portion 36, and the rear frame portion. 37, and a connecting frame portion 38 that spans 37.

  The seat back 32 includes a seat back frame 43 formed in a substantially square shape and a cushion portion 45 supported by the seat back frame 43.

Further, as shown in FIG. 3, the left rear seat 25 includes a seat back support mechanism (support mechanism) 51, a seat back lock mechanism 52, a seat cushion jump mechanism (fly mechanism) 53, and a seat cushion lock mechanism 54. And.
Similarly to the left rear seat 25, the right rear seat 26 includes a seat back support mechanism 51, a seat back lock mechanism 52, a seat cushion jump mechanism 53, and a seat cushion lock mechanism 54.

  That is, the seat back 32 and the seat cushion 31 are supported by the vehicle body floor 13 independently by the seat back support mechanism 51 and the seat cushion jumping mechanism 53, respectively, so-called double fall-down seats (the seat back 32 can be folded, the seat A seat capable of jumping up the cushion 31).

  Hereinafter, the seat back support mechanism 51 that supports the left rear seat 25, the seat back lock mechanism 52, the seat cushion jumping mechanism 53, and the seat cushion lock mechanism 54 will be described.

The seat back support mechanism 51 is a mechanism that rotatably supports the seat back 32 on the vehicle body floor 13 and moves the seat back 32 forward to the space 58 after the seat cushion 31 is flipped up.
The seat back support mechanism 51 includes an inner support means 61 that rotatably supports an inner lower portion 43a of the seat back frame 43, and an outer support means 71 that rotatably supports an outer lower portion 43b of the seat back frame 43. I have.

  As shown in FIG. 4, the inner support means 61 includes left and right inner rear support brackets 62, 63 attached to the center part 15 b in the vehicle width direction of the rear half floor portion 15 with a plurality of bolts 64, and left and right inner rear support brackets. 62 and 63 are provided with left and right inner and rear turning brackets 66 and 67 that are rotatably supported via an inner turning shaft (turning shaft) 65.

The left inner rear pivot bracket 66 has a left base bracket 66 a and a left mounting bracket 66 b connected by a plurality of bolts 68.
The left mounting bracket 66 b is connected to the inner lower portion 43 a of the left seat back frame 43. The left seat back frame 43 is a member constituting a frame provided in the seat back 32 of the left rear seat 25 shown in FIG.
That is, the inner lower portion 43 a of the left seat back 32 is rotatably supported on the left side of the inner support means 61.

In the right inner rear rotation bracket 67, a right base bracket 67a and a right mounting bracket 67b are connected by a plurality of bolts 68.
The right mounting bracket 67 b is connected to the inner lower portion 43 a of the right seat back frame 43. The right seat back frame 43 is a member constituting a frame provided in the seat back 32 of the right rear seat 26 shown in FIG.
That is, the inner lower portion 43 a of the right seat back 32 is rotatably supported on the right side of the inner support means 61.

Thus, the inner support means 61 is a means for rotatably supporting both the inner lower part 43a of the left rear seat 25 and the inner lower part 43a of the right rear seat 26.
That is, the inner support means 61 is a dual-purpose member that supports the left rear seat 25 and the right rear seat 26.

As shown in FIG. 5, the outer support means 71 rotates an outer rotation shaft (rotation shaft) 73 fixed to the outer lower portion 43 b of the seat back frame 43 via a mounting bracket 72, and the outer rotation shaft 73. And an outer support bracket 74 that is movably supported.
The outer support bracket 74 is attached to the rear outer position 15 c of the rear half floor portion 15 with a plurality of bolts 75.

Therefore, the outer lower portion 43 b of the seat back frame 43 is rotatably supported by the outer support bracket 74 via the outer rotation shaft 73.
Here, the outer rotation shaft 73 and the inner rotation shaft 65 (see FIG. 4) are provided coaxially.
Therefore, the seat back 32 shown in FIG. 2 swings (swings) between the standing position P1 (see FIG. 1) and the forward-turning position P2 (see FIG. 12) about the outer turning shaft 73 and the inner turning shaft 65. It is supported freely.

As shown in FIG. 6, the seat back locking mechanism 52 is a mechanism for locking the vicinity of the upper outer side (near the upper part) 44 a of the seat back 32 to the vehicle body side striker (vehicle body member) 77.
The vehicle body striker 77 is provided on the vehicle body 11.
The seat back lock mechanism 52 includes an operation lever portion 81 provided in the upper and outer portions 43 c of the seat back frame 43 and a forward-facing lock portion 82 provided in the vicinity of the upper and outer portions 44 a of the seat back frame 43. .

The forward locking part 82 includes a lock case 83 provided in the vicinity of the upper and outer portions 44a of the seat back frame 43, a latch 84 provided in the lock case 83, and a return spring (returning the latch 84 to the locking position). (Not shown).
The lock case 83 is provided in the outer frame 44 of the seat back frame 43 in the vicinity of the upper outer portion of the outer frame 44 (near the upper outer portion of the seat back frame 43) 44a.

The latch 84 is connected to an operation cable 86 extended from the operation lever portion 81 and is held in a locked position by a return spring (not shown).
When the operation cable 86 is pulled up by the operation lever portion 81, the latch 84 moves to the unlock position against the spring force of the return spring.

According to the seat back lock mechanism 52, the latch 84 is held in the locked position by the spring force of the return spring in a state where the seat back 32 is disposed at the upright position (use position) P1, so that the latch 84 is placed on the vehicle side striker. 77.
Thereby, the seat back 32 is supported by the vehicle body 11 via the vehicle body side striker 77, and the seat back 32 is held in the standing position P1.

Here, the forward lock part 82 is provided in the vicinity of the upper outer side part 44 a of the seat back frame 43. Therefore, the forward lock portion 82 is provided at a position sufficiently away from the outer rotation shaft 73 and the inner rotation shaft 65 (see FIG. 3).
As a result, the seatback 32 can be reliably prevented from being tilted forward with the outer rotation shaft 73 and the inner rotation shaft 65 as the axes with a relatively small holding force.
Therefore, the seat back lock mechanism 52 can suitably prevent the seat back 32 from being brought into the forward-turned state.

On the other hand, by operating the operation lever portion 81 in the direction of the arrow and pulling up the operation cable 86, the latch 84 moves to the unlock position against the spring force of the return spring.
Thereby, the latching state of the latch 84 and the vehicle body side striker 77 is released, and the seat back 32 can be tilted forward (tilted forward) from the standing position P1.

As shown in FIG. 7, the seat cushion jumping mechanism 53 is configured to place the seat cushion 31 between a seating position P3 (see FIG. 1) and a storage position P4 (see FIG. 12) in front of the vehicle body (forward) from the seating position P3. It is a mechanism that is movably supported.
The seat cushion jumping mechanism 53 includes a front leg portion 91 that rotatably supports a front portion 31b (see FIG. 2) of the seat cushion 31, a posture holding means 92 that holds the posture of the seat cushion 31, and the seat cushion 31. And urging means 93 for urging the basin toward the storage position P4.

The front leg portion 91 has an inner upper support bracket 95 provided on the connecting frame portion 38 of the seat cushion frame 35, and an upper end portion 97 a is rotatably supported by the inner upper support bracket 95 via an inner upper support shaft 96. An inner leg portion 97 and an inner / lower support bracket 99 that rotatably supports a lower end portion 97b of the inner leg portion 97 via an inner / lower support shaft 98 are provided.
The inner / lower support bracket 99 is attached to the seat support portion 15a of the rear half floor portion 15 with a plurality of bolts 101.

The front leg portion 91 is supported by an outer upper support bracket 103 provided on the outer frame portion 36 b of the frame frame portion 36, and an upper end portion 105 a is rotatably supported by the outer upper support bracket 103 via the outer upper support shaft 104. The outer leg portion 105, the outer lower support bracket 107 that rotatably supports the lower end portion 105b of the outer leg portion 105 via the outer lower support shaft 106, the approximate center of the outer leg portion 105, and the inner leg portion 97. And a connecting bar 108 spanning substantially the center.
The outer lower support bracket 107 is attached to the seat support portion 15 a of the rear half floor portion 15 with a plurality of bolts 101.

An outer upper support shaft 104 and an inner upper support shaft 96 are provided coaxially.
Therefore, the front portion 31b (see FIG. 2) of the seat cushion 31 is rotatably supported via the outer upper support shaft 104 and the inner upper support shaft 96.
Further, the outer lower support shaft 106 and the inner lower support shaft 98 are provided coaxially.
Therefore, the front leg portion 91 is swingably supported by the outer lower support bracket 107 and the inner lower support bracket 99 via the outer lower support shaft 106 and the inner lower support shaft 98.

The posture holding means 92 includes a connecting bracket 111 spanned between the inner upper support bracket 95 and the front frame portion 36c of the frame frame portion 36, and a posture holding rod 112 spanned between the connection bracket 111 and the inner lower support bracket 99. And.
The posture maintaining rod 112 is disposed in front of the vehicle body with respect to the inner leg portion 97 and the outer leg portion 105 (see also FIG. 1).
Further, the posture holding rod 112 is provided so that the front leg portion 91 can swing (swing) in the longitudinal direction of the vehicle body via the outer lower support shaft 106 and the inner lower support shaft 98.

Thus, by providing the posture holding rod 112, the posture holding rod 112 can hold the rear portion 31a of the seat cushion 31 in a floating posture.
As a result, the seat cushion 31 is moved between the seating position P3 (see FIG. 1) and the storage position P4 (see FIG. 12) by swinging the front leg portion 91 about the inner and outer lower support shafts 98 and 106. The rear portion 31a of the seat cushion 31 can be held in a floating posture.

The biasing means 93 is connected to the outer lower support shaft 106 at one end and is spirally wound around the spiral spring 115, and a substantially L-shaped latch capable of latching the other end 115a of the spiral spring 115. Member 116.
The locking member 116 is provided on the outer leg portion 105 and the connecting bar 108 of the front leg portion 91.

The urging force (spring force) of the spiral spring 115 can be applied to the front leg portion 91.
Therefore, the front leg portion 91 can be swung (swinged) toward the front of the vehicle body by the urging force (spring force) of the spiral spring 115 around the outer lower support shaft 106 and the inner lower support shaft 98.
Accordingly, the seat cushion 31 can be biased toward the storage position P4 (see FIG. 12) by the biasing force (spring force) of the spiral spring 115.

  2 and 3, the seat cushion locking mechanism 54 can hold (support) the seat cushion 31 at the seating position P3, and the seat cushion 31 is held at the seating position P3 by tilting the seat back 32 forward. It is a mechanism that can be released.

As shown in FIGS. 8 and 9, the seat cushion locking mechanism 54 is rotatably supported by a support rod 121 provided at a substantially center 37 a of the rear frame portion 37 and a tip support shaft 121 a of the support rod 121. An engagement piece 122 and a lock release piece 124 that can be engaged with the engagement piece 122 are provided.
Further, the seat cushion locking mechanism 54 includes a return means 125 that returns the engagement piece 122 to the engagement position P5 that can be engaged with the lock release piece 124, and a stopper 128 that holds the engagement piece 122 at the engagement position P5. It has.

The engagement piece 122 is formed in a substantially inverted J shape when viewed from the side, the top 122a is rotatably supported by the tip support shaft 121a of the support rod 121, and the engagement recess 123 is formed by the front and rear protrusions 122b and 122c. Has been.
In a state where the engagement piece 122 is in contact with the stopper 128 and held at the engagement position P5, the distal end engagement rod 124a of the lock release piece 124 is engaged with the engagement recess 123 of the engagement piece 122.

In this state, the tip support shaft 121a of the support rod 121 is positioned above the tip engagement rod 124a, and the rear protrusion 122c is kept in contact (contact) with the tip engagement rod 124a.
Therefore, the rear engagement portion 124c (that is, the seat cushion 31) is moved toward the storage position P4 (see FIG. 13B) by the urging force of the spiral spring 115 (see FIG. 7) by the tip engagement rod 124a. Can be prevented.
Accordingly, the seat cushion 31 (that is, the left rear seat 25) is held so that an occupant can be seated.

The unlocking piece 124 is formed in a substantially U-shape to have a distal end engaging rod 124 a at the distal end, and a pair of base end portions 124 b are provided on the seat back frame 43.
The unlocking piece 124 is provided with a pair of base end portions 124b from below at the center 43e of the lower frame portion 43d of the seat back frame 43, and extends downwardly toward the front of the vehicle body.

The unlocking piece 124 extends downward toward the front of the vehicle body, so that the front end engaging rod 124a is rotated by the rotation shaft (that is, the inner rotation shaft 65 and the outer rotation shaft) of the seat back 32 (see FIG. 2). 73).
The rear frame portion 37 (that is, the rear portion 31a of the seat cushion 31) is supported by the lock release piece 124 by engaging the front end engagement rod 124a of the lock release piece 124 with the engagement recess 123 of the engagement piece 122. The
As a result, the seat cushion 31 is held at the seating position P3.

Here, the seat back 32 is tilted forward in the direction of arrow A with the inner and outer rotation shafts 65 and 73 (see also FIG. 3) as an axis, so that the unlocking piece 124 has the inner and outer rotation shafts 65 and 73 as axes. Then, it is rotated (swinged) by a predetermined angle in the direction of arrow B behind the seat back 32.
By unlocking piece 12 4 to dynamic Jo Tokoro angle times, it is possible to get out of the front end engaging the rod 124a from the engagement recess 123 of the engaging piece 122. The engagement of the engagement piece 122 and the lock release piece 124 is released when the distal end engagement rod 124 a comes out of the engagement recess 123.

Thus, the holding state (locked state) of the seat cushion 31 is released by rotating the lock release piece 124 to the rear of the seat back 32 as the seat back 32 tilts forward. That is, the locked state of the seat cushion lock mechanism 54 is released.
Accordingly, the seat cushion 31 can be reliably released from the seating position P3 by operating the seat back 32 forwardly.

The return means 125 includes a tension spring 126 that returns the engagement piece 122 to an engagement position P5 that can be engaged with the lock release piece 124, and a locking rod 127 that locks the tension spring 126.
The tension spring 126 has a front end portion 126 a locked to the front protruding portion 122 b and a rear end portion 126 b locked to the locking rod 127.
The locking rod 127 has a pair of base end portions 127 a provided at a substantially center 37 a of the rear frame portion 37.
Therefore, the engagement piece 122 can be biased in the direction to return to the engagement position P5 by the spring force of the tension spring 126.

The stopper 128 is a member that holds the engagement piece 122 at the engagement position P5.
The stopper 128 has a base end portion 128a provided on the support rod 121 and a positioning portion 128b provided on the tip end.
By bringing the engagement piece 122 into contact with the positioning portion 128b, the engagement piece 122 can be positioned at the engagement position P5.

Therefore, in a state where the engagement of the engagement piece 122 and the lock release piece 124 is released, the engagement piece 122 can be returned toward the engagement position P5 by the urging force (spring force) of the tension spring 126.
When the engagement piece 122 returns to the engagement position P5, the engagement piece 122 contacts the positioning portion 128b of the stopper 128 and is held at the engagement position P5.

As described above, the seat cushion lock mechanism 54 is provided with the tension spring 126 and the stopper 128, and the engagement piece 122 is returned to the engagement position P5 by the tension spring 126 and the stopper 128.
Therefore, when the seat cushion 31 is returned to the seating position P3, the engagement piece 122 can be held at the engagement position P5.

Thereby, the engagement piece 122 can be engaged with the lock release piece 124 by a simple operation of simply returning the seat cushion 31 to the seating position P3.
By engaging the engagement piece 122 with the lock release piece 124, the rear portion 31 a (see FIG. 1) of the seat cushion 31 can be supported in a state of floating from the rear half floor portion 15.
Therefore, when an occupant sits on the seat cushion 31, the rear portion 31a of the seat cushion 31 can be supported by the seat cushion lock mechanism 54 (the support rod 121, the engagement piece 122, the lock release piece 124, and the like).

As described above, the seat cushion lock mechanism 54 is provided with the unlocking piece 124 below the outer turning shaft 73 and the inner turning shaft 65 of the seat back 32, and the unlocking piece 124 is moved along with the forward tilt of the seat back 32. And can be rotated backward.
Further, as the seat back 32 is tilted forward in the direction of arrow A, the holding state of the seat cushion 31 is released by rotating the lock release piece 124 to the rear of the seat back 32 (in the direction of arrow B). .

The seat cushion 31 can be released from the seating position P3 (see FIG. 1) by rotating the lock release piece 124 backward to release the holding state of the seat cushion 31.
Thus, by operating the seat back 32 forward, the seat cushion 31 can be released from the seating position P3, so that the rear seat 24 can be folded without trouble.

In addition, by providing the outer lower support shaft 106 with the spiral spring 115 of the seat cushion jumping mechanism 53, the seat cushion 31 is biased toward the storage position P4 (see FIG. 12) by the biasing force of the spiral spring 115. Can do.
Therefore, the seat cushion 31 can be moved to the storage position P4 by the urging means 93 only by releasing the seat cushion 31 from the seating position P3 (see FIG. 1) by operating the seat back 32 forward.
As a result, the rear seat 24 can be easily folded without further effort.

Here, for example, it is conceivable that a load hits the seat back 32 from the rear of the vehicle body and the seat back 32 moves toward the front of the vehicle body.
Thus, when the seat back 32 moves toward the front of the vehicle body, the unlocking piece 124 moves toward the front of the vehicle body along with the seat back 32.

At this time, the lock release piece 124 does not rotate rearward (in the direction of arrow B) of the seat back 32, and the locked state of the seat cushion lock mechanism 54 is not released.
Thus, for example, when a seat hits from the rear of the vehicle body and the seat back 32 moves to the front of the vehicle body, the unlocking piece 124 moves toward the front of the vehicle body and engages deeper with the engagement recess 123 of the engagement piece 122. It becomes a state.
Thereby, the locked state of the seat cushion lock mechanism 54 is prevented from being released, and the locked state of the seat cushion 31 can be stably secured.

In addition, as described above, the forward lock portion 82 shown in FIG. 6 is provided in the vicinity of the upper outer portion 44 a of the seat back frame 43. Therefore, the forward lock portion 82 is provided at a position sufficiently away from the outer rotation shaft 73 and the inner rotation shaft 65 (see FIG. 3).
As a result, the seatback 32 can be reliably prevented from being tilted forward with the outer rotation shaft 73 and the inner rotation shaft 65 as the axes with a relatively small holding force.
Therefore, the seat back 32 can be prevented from being tilted forward by the seat back lock mechanism 52, and the seat cushion 31 can be stably held at the seating position P3.

Next, an example in which the rear seat 24 is folded will be described with reference to FIGS.
10 to 12, only the left rear seat 25 will be described in order to facilitate understanding of the folding operation of the rear seat 24.

As shown in FIG. 10A, the operation cable 86 is pulled up by operating the operation lever portion 81 of the seat back lock mechanism 52 in the arrow C direction. By pulling up the operation cable 86, the latch 84 (see also FIG. 6) moves to the unlocked position against the spring force of the return spring.
Accordingly, the latched state of the latch 84 and the vehicle body side striker 77 (see FIG. 6) is released.

In this state, the seat back 32 is tilted forward (inclined forward) as shown by an arrow D from the standing position P1 with the inner and outer rotation shafts 65 and 73 (see also FIG. 3) as axes.
By releasing the operating force from the operation lever portion 81, the latch 84 is returned to the locked position by the return spring, and the returned latch 84 is held in the locked position.

As shown in FIG. 10B, the seat back 32 moves forward by a predetermined angle as indicated by an arrow D.
Therefore, the unlocking piece 124 rotates by a predetermined angle as indicated by an arrow E toward the rear of the seat back 32 against the urging force (spring force) of the tension spring 126 about the inner and outer rotation shafts 65 and 73. Swing).

As shown in FIG. 11A, the lock release piece 124 swings toward the rear of the seat back 32 as indicated by an arrow E, so that the tip engagement rod 124 a of the lock release piece 124 is engaged with the engagement piece 122. Get out of the mating recess 123.
The engagement of the engagement piece 122 and the lock release piece 124 is released when the distal end engagement rod 124 a comes out of the engagement recess 123.

In this state, the engagement piece 122 is held in contact with the positioning portion 128 b of the stopper 128 by the spring force of the tension spring 126.
The engagement piece 122 is held at the engagement position P5 by being held in a state where the engagement piece 122 is in contact with the positioning portion 128b.

By releasing the engagement between the engagement piece 122 and the lock release piece 124, the holding state of the seat cushion 31 at the seating position P3 (see FIG. 10A) is released.
Accordingly, the seat cushion 31 moves (bounces up) as indicated by the arrow F from the seating position P3 toward the storage position P4 (see FIG. 12) in front of the vehicle body by the spring force of the spiral spring 115 (see FIG. 7).

As shown in FIG. 11B, the seat cushion 31 springs up as shown by an arrow F toward the storage position P4 by the spring force of the spiral spring 115, and the seat back 32 moves forward as shown by an arrow D.
Specifically, the front leg portion 91 is swung toward the front of the vehicle body about the inner and outer lower support shafts 98 and 106, and the seat cushion 31 is moved from the seating position P3 toward the storage position P4.
In this state, the rear portion 31a of the seat cushion 31 can be held in a posture suspended by the posture holding rod 112.

As shown in FIG. 12, the seat cushion 31 is stored in the storage position P4. In this state, the rear portion 31 a of the seat cushion 31 is placed in the vicinity of the ridge line 15 d of the rear half floor portion 15.
By storing the seat cushion 31 in the storage position P4 independently of the seat back 32, a space 58 can be secured above the rear half floor portion 15 of the vehicle body floor 13.

Therefore, the seat back 32 can be accommodated (arranged) in the space 58 secured above the second half floor portion 15 by moving the seat back 32 forward to the forward position P2 independently of the seat cushion 31.
Accordingly, the rear seat 24 can be folded so that the back surface 32b of the seat back 32 is substantially flush with the cargo compartment floor portion 16, and a storage space 131 for loading luggage can be secured.

At this time, in a state where the seat cushion 31 is disposed at the storage position P4 and the seat back 32 is disposed at the forward position P2, the seat cushion 31 and the seat back 32 are in an unconnected state.
In this way, the storage posture of the left rear seat 25 can be finely adjusted by disengaging the seat cushion 31 and the seat back 32.

As described with reference to FIGS. 10 to 12, the seat cushion 31 can be released from the seating position P <b> 3 (see FIG. 1) as the seat back 32 tilts forward in the direction of arrow D.
As a result, by operating the seat back 32 forward, the seat cushion 31 can be released from the seating position P3 and the rear seat 24 can be folded without trouble.

Next, an example in which the rear seat 24 is returned to the seating position will be described with reference to FIGS.
13 to 16, only the left rear seat 25 will be described for easy understanding of the operation of returning the rear seat 24 to the seating position.

  As shown in FIG. 13 (a), in the state in which the left rear seat 25 is folded, the seat back 32 is pivoted about the inner and outer turning shafts 65 and 73 (see also FIG. 3) as shown by the arrow G from the forward-turned position P2. cause.

As shown in FIG. 13B, by causing the seat back 32 to move forward from the standing position P2 to the standing position P1, the latch 84 at the lock position comes into contact with the vehicle-side striker 77 (see FIG. 6).
The latch 84 swings against the spring force of the return spring, and the vehicle body side striker 77 gets over the latching claw of the latch 84. When the vehicle body side striker 77 gets over the engaging claw of the latch 84, the latch 84 is returned to the locked position by the spring force of the return spring and is engaged with the vehicle body side striker 77.

Therefore, the seat back 32 can be supported by the vehicle body 11 (see FIG. 6) via the vehicle body striker 77, and the seat back 32 is held in the standing position P1.
In this state, the seat cushion 31 swings (rotates) as indicated by an arrow H from the storage position P4 with the inner and outer lower support shafts 98 and 106 as axes.

As shown in FIG. 14A, the seat cushion 31 moves away from the storage position P4 by swinging (turning) the seat cushion 31 toward the seating position P3.
Specifically, the front leg portion 91 swings around the inner and outer lower support shafts 98 and 106 toward the rear of the vehicle body, and the seat cushion 31 moves from the storage position P4 toward the seating position P3.
In this state, the rear portion 31a of the seat cushion 31 can be held in a posture suspended by the posture holding rod 112.

As shown in FIG. 14B, the seat cushion 31 swings (rotates) to the vicinity of the seating position P3. Here, the posture holding rod 112 is bridged between the connecting bracket 111 and the inner and lower support brackets 99.
Therefore, the seat cushion 31 is disposed substantially in parallel in a state where the seat cushion 31 swings to the vicinity of the seating position P3.
In this state, the seat cushion 31 is swung as shown by the arrow H to the seating position P3.

As shown in FIG. 15A, the rear protrusion 122c (specifically, the lower end of the engagement piece 122) is obtained by swinging the seat cushion 31 to the vicinity of the seating position P3 (see FIG. 14B). 122d) abuts on the distal end engaging rod 124a of the unlocking piece 124.
In this state, the seat cushion 31 further swings toward the seating position P3 as indicated by an arrow H, so that the tip support shaft 121a of the support rod 121 moves as indicated by an arrow H together with the seat cushion 31.
Therefore, the engagement piece 122 swings (rotates) as indicated by the arrow I about the tip support shaft 121a against the urging force (spring force) of the tension spring 126.

As shown in FIG. 15B, the seat cushion 31 continuously swings (rotates) toward the seating position P3 (see FIG. 14B), so that the lower end portion 122d of the rear protrusion 122c is moved. Get over the tip engagement rod 124a.
In this state, the engagement piece 122 swings (rotates) as indicated by an arrow J about the tip support shaft 121a by the urging force (spring force) of the tension spring 126.
As the engagement piece 122 swings, the engagement piece 122 contacts the positioning portion 128b of the stopper 128 and is held at the engagement position P5.

As shown in FIG. 16A, the seat cushion 31 is disposed at the seating position P3 (see FIG. 16B).
At this time, the engagement piece 122 is lowered while the rear protrusion 122c is in contact with the tip engagement rod 124a. Then, in a state where the seat cushion 31 is disposed at the seating position P <b> 3, the engagement recess 123 of the engagement piece 122 engages with the tip engagement rod 124 a of the lock release piece 124.
In this state, the tip support shaft 121a of the support rod 121 is positioned above the tip engagement rod 124a.

As illustrated in FIG. 16B, the seat cushion 31 can be held at the seating position P <b> 3 by the engagement recess 123 of the engagement piece 122 engaging the tip engagement rod 124 a of the lock release piece 124.
In this state, as shown in FIG. 16A, the rear protrusion 122c is kept in contact (contact) with the tip engagement rod 124a.

Therefore, the rear engagement portion 124c (that is, the seat cushion 31) is moved toward the storage position P4 (see FIG. 13B) by the urging force of the spiral spring 115 (see FIG. 7) by the tip engagement rod 124a. Can be prevented.
Thereby, an occupant can sit on the seat cushion 31 (that is, the left rear seat 25).

Here, in the present embodiment, in a state where the seat cushion 31 is disposed at the seating position P3 (see FIG. 16B), the tip support shaft 121a of the support rod 121 is positioned above the tip engagement rod 124a. However, the present invention is not limited to this.
In other words, in a state where the seat cushion 31 is disposed at the seating position P3, the front end support is provided at a position where the front end engagement rod 124a can prevent the seat cushion 31 from moving toward the storage position P4 by the urging force of the spiral spring 115. The shaft 121a is positioned.

For example, by disposing the tip support shaft 121a slightly behind the vehicle body with respect to the tip engagement rod 124a, the movement of the seat cushion 31 toward the storage position P4 can be more preferably prevented.
In this case, the tip support shaft 121a is positioned so that the tip engagement rod 124a can be removed from the engagement recess 123 of the engagement piece 122 when the seat back 32 is moved forward by a predetermined angle.

As described with reference to FIGS. 13 to 16, the engagement piece 122 can be engaged with the lock release piece 124 by a simple operation of simply returning the seat cushion 31 to the seating position P <b> 3.
By engaging the engagement piece 122 with the lock release piece 124, the seat cushion 31 can be easily held at the seating position P3.

In addition, the vehicle seat according to the present invention is not limited to the above-described embodiment, and can be changed or improved as appropriate.
For example, in the above-described embodiment, the example in which the spiral spring 115 is provided on the lower end portion 105b side of the outer leg portion 105 has been described. It is also possible.
Moreover, it is also possible to provide the spiral spring 115 in both the upper end part 105a and the lower end part 105b.
Furthermore, the spiral spring 115 can be provided on the inner leg portion 97.

  In the above-described embodiment, the example in which the left rear seat 25 of the rear seat 24 is moved to the folded state or the seated state has been described. It is possible.

  Further, the vehicle 10, the vehicle body floor 13, the vehicle seat 20, the seat cushion 31, the seat back 32, the seat back support mechanism 51, the seat back lock mechanism 52, the seat cushion jump mechanism 53, and the seat cushion lock shown in the above embodiment. The shapes and configurations of the mechanism 54, the inner and outer pivot shafts 65 and 73, the vehicle body striker 77, the biasing means 93, the engagement piece 122, the lock release piece 124, the return means 125, the stopper 128, and the like are limited to those illustrated. It is not a thing and it can change suitably.

  INDUSTRIAL APPLICABILITY The present invention is suitable for application to an automobile equipped with a vehicle seat in which a seat back can be moved forward and a seat cushion can be moved from a seating position to a storage position in front of the vehicle body.

DESCRIPTION OF SYMBOLS 10 ... Vehicle, 13 ... Vehicle body floor, 20 ... Vehicle seat, 31 ... Seat cushion, 32 ... Seat back, 44a ... Near the upper outer side of seat back (near upper part), 51 ... Seat back support mechanism (support mechanism), 52 ... Seat back lock mechanism, 53 ... Seat cushion jump mechanism (fly mechanism), 54 ... Seat cushion lock mechanism, 58 ... Space, 65, 73 ... Inside / outside turning shaft (turning shaft), 77 ... Vehicle body side Strike (vehicle body member), 93 ... biasing means, 98 ... inner lower support shaft, 106 ... outer lower support shaft, 112 ... posture holding rod, 122 ... engagement piece, 124 ... unlocking piece, 125 ... return means, 128 ... stopper, P1 ... standing position, P2 ... forward tilt position, P3 ... seating position, P4 ... storage position, P5 ... engagement position.

Claims (6)

Seat cushion, seat back,
A jumping mechanism for moving the seat cushion between a seating position and a storage position in front of the seating position;
A support mechanism for rotatably supporting the seat back on a vehicle body floor, and forcing the seat back forward to a space after the seat cushion is flipped up;
The seat cushion can be held at the seating position, the vehicle seat provided with said seat cushion releasable seat cushion locking mechanism holding state of in the seated position by ahead of the seat back,
The seat cushion locking mechanism is
Provided below the rotation axis of the seat back, comprising a lock release piece that can be rotated rearward of the seat back as the seat back is tilted forward,
The unlocking piece is fixed to the seat back frame, and rotates in conjunction with the forward tilt of the seat back,
A vehicle seat characterized in that the state of holding the seat cushion in the seating position can be released by rotating the unlocking piece to the rear of the seat back as the seat back is tilted forward. The seat cushion locking mechanism is
An engagement piece engageable with the unlocking piece;
The seat cushion can be held in the sitting position by engaging the engagement piece with the unlocking piece,
2. The vehicle seat according to claim 1, wherein the engagement with the engagement piece can be released by rotating the lock release piece by a predetermined angle rearward of the seat back. The seat cushion locking mechanism is
In a state where the engagement of the engagement piece and the unlocking piece is released,
The vehicle seat according to claim 2, further comprising return means for returning the engagement piece to an engagement position at which the engagement piece can be engaged with the unlocking piece. The jump mechanism is
2. The vehicle seat according to claim 1, further comprising urging means for urging the seat cushion toward the storage position.   3. The vehicle seat according to claim 1, further comprising a seat back locking mechanism that locks a vicinity of an upper portion of the seat back to a vehicle body member when the seat back is in a standing position. 4. The jump mechanism is
The seat cushion has a posture holding rod that allows the front portion of the seat cushion to swing in the longitudinal direction of the vehicle body via the outer lower support shaft and the inner lower support shaft, and one end of the biasing means is connected to the outer lower support shaft. The vehicle seat according to claim 4, wherein the other end is locked to the seat cushion via a locking member.

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