JP2006051869A - Folding seat device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a folding seat device for a vehicle capable of reliably achieving automatic shift from folding operation of a seat back rest to jumping-up operation of a seat, and moreover, lightly performing sliding operation of the seat in a normally seated state. <P>SOLUTION: This folding seat device is provided with a reclining/lock cooperation means releasing the lock of a turning lock mechanism LM in cooperation with the rotation when retention of the seat back rest 12 at a standing position by a reclining mechanism is released and the seat back rest 12 is rotated to the folding position side and allowing the rotation of a lower rail 30 to a jamp-up position by the rotation energizing force of a rotation support mechanism 80, and a rotation/slide cooperation means releasing the lock of a slide lock mechanism 40 in cooperation with the rotation when the lower rail 30 is rotated to the jamp-up position side by the rotation support mechanism 80 and allowing an upper rail 20 to move to a lower moving end along the lower rail 30 by its own weight. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a foldable vehicle seat device that can be flipped up while folding a seat provided on a vehicle floor.

As a prior art of a foldable vehicle seat device capable of shifting between a normal use state and a state of being flipped up from a vehicle floor (accommodable), for example, there is one described in Patent Document 1.
In the invention of this Patent Document 1, a lower rail facing in the front-rear direction is fixed to the vehicle floor surface, and an upper rail is assembled to the lower rail so as to be slidable in the front-rear direction, with the upper rail facing forward between the upper rail and the lower rail. A spring means for biasing is provided, and a slide lock mechanism for prohibiting or allowing sliding of the upper rail with respect to the lower rail is provided. The upper rail is pivotally mounted so that the front end of the seat portion of the vehicle seat can rotate about a left-right axis, and the seat portion is parallel to the upper rail (vehicle floor) and the seating position and the upper rail. It is possible to rotate between the jumping positions that are substantially orthogonal (perpendicular). A backrest is pivotally attached to the seat so that it can rotate between a standing position and a folded position, and a striker provided on the vehicle floor is grasped and released. When the rotation lock mechanism grips the striker with the seat portion in the seating position, the seat is held in the seating position.

  Further, the folding vehicle seat is further provided with the backrest and the seat at the folding position and the jumping position so that the transition from the use state to the flip-up state (storage state) can be performed smoothly. A first interlocking mechanism that causes the slide lock mechanism to shift to a sliding permissible state in conjunction with a rotational movement toward the folding position side of the backrest, and a slide lock mechanism that slides. As a result of allowing, the second interlocking means for releasing the rotation lock mechanism when the seat (upper rail) slides to the front moving end by the biasing force of the spring means is provided.

The foldable vehicle seat having such a structure folds the backrest when the seat is in the sitting position, the backrest is in the upright position, and the rotation lock mechanism holds the striker. When moved to the position, the slide lock mechanism allows sliding by the action of the first interlocking mechanism, and the seat (upper rail) automatically moves to the front moving end by the biasing force of the spring means. Then, when the sheet reaches the front moving end, the rotation interlock mechanism releases the striker by the action of the second interlocking means, and the sheet is automatically rotated to the jumping position by the rotation urging force. Shifts to the storage state (bounce-up state).
JP 2000-94996 A

  In the invention of Patent Document 1, as described above, when the backrest is moved to the folding position, the seat automatically shifts to the stowed state, so that the seat can be easily stowed. Since the spring means is provided, in the normal seating state, when the seat (upper rail) is manually slid backward, the spring means becomes a resistance, and the rear slide operation requires a large force. was there.

  Furthermore, for example, when the spring means and the slide device (lower rail and upper rail) deteriorate, the seat reaches the front moving end when the seat is moved forward in conjunction with the movement of the backrest toward the folding position. As a result, the rotation lock mechanism may not be able to automatically release the striker.

  An object of the present invention is a foldable type that can reliably achieve automatic transition from a folding operation of a backrest to a flip-up operation of a seat and can easily perform a sliding operation of a seat in a normal seating state. The object is to provide a vehicle seat device.

  The foldable vehicle seat device according to the present invention is a seating position in which the lower rail that supports the upper rail so as to be slidable in the front-rear direction is substantially parallel to the vehicle floor surface around one of the front and rear ends. And a rotation support mechanism for rotating the lower rail toward the jumping position and the lower rail at the seating position. Sometimes, the lower rail is locked or unlocked to the vehicle floor to prevent or allow the rotation by the rotation support mechanism, and the relative sliding between the upper rail and the lower rail is locked or unlocked. The seat lock of the seat fixed to the upper rail, and the backrest thereof can be rotated between the folding position and the standing position, and is urged to rotate to the folding position. A reclining mechanism for holding or releasing the backrest in the upright position, and releasing the holding of the backrest in the upright position by the reclining mechanism to rotate the backrest to the folding position side. A reclining lock interlocking means for releasing the lock of the rotation locking mechanism in conjunction with the rotation, and allowing the lower rail to rotate to the jumping position by the rotation biasing force of the rotation support mechanism; and the rotation When the lower rail is rotated to the jump position side by the support mechanism, the lock of the slide lock mechanism is released in conjunction with the rotation, and the upper rail is moved to the lower moving end along the lower rail by its own weight. Rotating / sliding interlocking means that allows movement.

  The rotation lock mechanism is provided on one of the seat and the vehicle floor, and the rotation lock mechanism is a lock position for gripping a striker provided on the other of the seat and the vehicle floor, A hook that is rotatable between the unlock position for releasing the striker, an engagement position that engages with the hook at the lock position and prohibits the hook from rotating toward the unlock position; and It is practical to comprise a pole that is rotatable away from the hook and between a non-engagement position that allows the hook to rotate toward the unlock position.

  For example, when the rotation support mechanism rotates the lower rail to the jumping position, the first wire is connected to the rotation / slide interlocking means, for example, the first wire that links the rotation support mechanism and the slide lock mechanism. It is possible to provide a wire pulling mechanism that pulls and releases the lock of the slide lock mechanism.

  According to the present invention, the automatic transition from the folding operation of the backrest to the raising operation of the seat can be reliably achieved, and the sliding operation of the seat in the normal seating state can be easily performed.

Hereinafter, the present invention will be described based on illustrated embodiments.
First, a vehicle folding seat to which the present invention is applied and its peripheral members will be described.
1 to 3 show a vehicle floor surface 100 in an automobile (not shown) and a foldable seat 10 that is rotatably provided on the vehicle floor surface 100. The foldable seat 10 of the vehicle floor surface 100 is shown in FIG. A recess 100A is provided in the front.
The foldable seat 10 has a seat portion 11 and a reclining mechanism RM at the rear end of the seat portion 11 in the left-right direction (the front and back direction of the paper surface of FIGS. 1 to 3 is the left-right direction, and the left side of FIGS. And a backrest 12 pivotally mounted so as to be rotatable around an axis of the front and the right side as the rear. By the action of the reclining mechanism RM, the backrest 12 moves in the front-rear direction between an upright position (see FIG. 1) that is substantially orthogonal to the seat portion 11 and a folding position that is substantially parallel to the seat portion 11 (see FIG. 2). The reclining mechanism RM has a function of holding the backrest 12 in an upright position. Further, as shown in FIG. 4, the reclining mechanism RM includes a lever RML that is rotatable about a rotation axis RMA that faces the left-right direction and protrudes from a metal seat cushion frame 70 embedded in the seat portion 11. It has. The lever RML is provided on the backrest 12 and is rotated by being pressed by a pressing pin P that rotates integrally with the backrest 12. One end of the lever RML is a wire (reclining / lock interlocking means) W 1. One end is fixed.
A pair of left and right upper rails 20 are fixed to the bottom surface of the seat 11 so as to face in the front-rear direction and have a bowl shape with an open bottom surface. The left and right upper rails 20 are movable (slidable) in the front-rear direction with respect to the lower rail 30 that faces in the front-rear direction forming a shape surrounding the upper rail 20 in a cross-sectional view (a bowl shape with an open upper surface). Yes.

Each of the upper rails 20 has a cross-sectional shape shown in FIG. 5 and FIGS. 8 to 10, and a widening rising inclined portion 21 and a reduced width rising inclined portion 22 are provided on the left and right sides thereof, and on the outer side surface thereof. Two locking holes 23 are formed side by side in the front-rear direction, and a slide lock mechanism 40 is attached to the upper surface thereof.
The slide lock mechanism 40 includes a bracket 41, a lock lever 43, and a bracket 49. The bracket 41 placed on the upper surface of the upper rail 20 is screwed into a screw hole (not shown) of the seat cushion frame 70 by screwing a bolt B1 penetrating the upper rail 20 and the bracket 41 into the upper rail 20. 20 is fixed. An intermediate portion of the lock lever 43 facing substantially in the front-rear direction is pivotally attached to the end portion of the bracket 41 so as to be rotatable around the pivot pin 42 by a pivoting pin 42 facing in the vertical direction. A knob portion 44 protrudes from the front end portion of the lock lever 43, and a locking hole 45 is formed at the tip portion of the knob portion 44. Further, a pair of front and rear lock claws 46 project from the rear end portion of the lock lever 43, and a long hole 47 is formed in the upper surface of the lock lever 43.

  A bracket 49 placed on the upper surface of the upper rail 20 behind the bracket 41 is fixed to the upper surface of the upper rail 20 by two bolts B2, and further, a bolt B3 penetrating the upper portion of the upper rail 20 and the bracket 49 is provided. It is screwed into a screw hole (not shown) provided in the seat cushion frame 70. And the guide pin 51 which penetrates the protrusion 50 of the bracket 49 to the up-down direction is fitted in the said long hole 47 so that a movement is possible. The lock lever 43 can rotate around the pivot pin 42 within a range in which the fitting relationship between the guide pin 51 and the long hole 47 is maintained. Two hanging holes 53 and two through holes 54 are formed in the hanging piece 52 of the bracket 49, and a locking portion S 1 a provided at one end of the tension spring S 1 is locked in both the locking holes 53. The locking portion S 1 b at the other end of the tension spring S 1 is locked in a locking hole 48 formed in the lock lever 43. Due to the urging force of the tension spring S 1, the lock lever 43 always locks the lock claw 46 into the through hole 54, the locking hole 31 formed on the outer side surface of the lower rail 30, and the locking hole 23. It is urged to rotate toward the position (position in FIGS. 6 and 10).

  The lower rail 30 has the cross-sectional shape shown in FIGS. 5 and 8 to 10, and a side space 32 and a side space that receive the widening and rising slopes 21 and 22 of the upper rail 20 at both left and right ends thereof. 33 is formed. A retainer 60 facing in the front-rear direction is disposed in the side space 32 and the side space 33, and a plurality of metal balls are provided in the support recesses 61 and 62 formed in the retainer 60 as two upper and lower stages. 63 and 64 are rotatably supported. The balls 63 and 64 are sandwiched between the corners of the inner surface of the side space 33 and the widening and rising slopes 21 and 22 of the upper rail 20. The resistance when moving in the front-rear direction with respect to the lower rail 30 is reduced. As shown in FIG. 10, when the lock lever 43 is in the locked position, the lock claw 46 passes through a long hole 65 that is long in the front-rear direction formed in the outer retainer 60.

A rotation support mechanism 80 that rotatably supports the lower rail 30 on the vehicle floor surface 100 is provided at the front ends of the bottom surfaces of the left and right lower rails 30.
A metal rail side bracket 81 is welded to the front end of the bottom surface of the lower rail 30, and a pair of left and right side pieces 82 are formed on the rail side bracket 81. Through holes 83 concentric with each other are formed in the both side pieces 82, and the upper part of the front end of the outer side piece 82 (right side in FIG. 14) is a pressing portion 84 having a substantially linear shape in side view.
The distance between the left and right side pieces 87 of the floor surface side bracket 86 paired with the left and right rail side brackets 81 is narrower than the distance between the left and right side pieces 82 of the rail side bracket 81, and the left and right side pieces 87 are concentric with each other. A pair of front and rear through-holes 88A and 88B are formed, and a pair of front and rear mounting holes 90 (see FIG. 4) are formed in the bottom portion 89 thereof. The left and right floor surface side brackets 86 are positioned between the left and right side pieces 82 of the rail side bracket 81, and the left and right through holes 88A overlap with the left and right through holes 83, respectively. A pivot pin 92 that faces in the left-right direction passes through the through-hole 88 </ b> A so as to be rotatable, and the rail side bracket 81 and the floor surface side bracket 86 are pivotally pivoted around the pivot pin 92 by the pivot pin 92. ing. Further, a dumble spring 93 made of a torsion coil spring is disposed in a space surrounded by the rail side bracket 81 and the floor surface side bracket 86, and the pivot pin 92 passes through the annular portion 94, and both ends thereof are arranged. The portions 95 are in elastic contact with the locking pins 91 fitted in the ceiling surface of the rail-side bracket 81 and the left and right through holes 88B (a locking washer WA is attached to the tip of the locking pin 91). )
The rail side bracket 81, the floor surface side bracket 86, the locking pin 91, the pivot pin 92, the dumble spring 93, and the washers WA and WB are components of the rotation support mechanism 80.

The tip of the pivot pin 92 protrudes to the outside of the side piece 82 of the rail side bracket 81. This tip has a non-circular cross section 92a. A cable winding drum 96 is attached to the non-circular cross section 92a. A mounting hole 97 that penetrates in the left-right direction and has the same cross-sectional shape as the non-circular cross-sectional portion 92a is fitted and fixed so as not to be relatively rotatable (further, a stopper washer WB is attached to the tip of the non-circular cross-sectional portion 92a. Have been). The cable winding drum 96 is provided with a flange 98 that is substantially semicircular in a side view, and further has a circumferential winding surface 99. One end surface of the flange 98 serves as a contact surface 98a with which the pressing portion 84 of the rail side bracket 81 contacts. The vicinity of the one end of the wire (first wire) W2 is wound around the winding surface 99, and one end of the wire W2 (the end on which the ball shown in FIG. 14 is provided) is fixed to the winding surface 99. The other end of the wire W <b> 2 is locked in the locking hole 45 of the lock lever 43. The wire W2 is always tensed by the urging force of the tension spring S1, and the cable winding drum 96 is always urged to rotate clockwise in a side view when the wire W2 is tensed. Always contacts the pressing portion 84.
The pressing portion 84, the pivot pin 92, the cable winding drum 96, and the wire W2 are components of the rotation / slide interlocking means. The pressing portion 84, the pivot pin 92, and the cable winding drum 96 are a wire pulling mechanism. Is a component of

Then, a pair of bolts B4 are inserted into both mounting holes 90 of the left and right floor surface side brackets 86, and both the bolts B4 are screwed into screw holes (not shown) provided in the vehicle floor surface 100, thereby folding the seat. 10 is attached to the vehicle floor 100. The foldable seat 10 attached to the vehicle floor 100 is rotatable in the front-rear direction around the pivot pin 92 and is always urged to rotate forward by the dumble spring 93.
A pair of left and right strikers 101 projecting in an inverted U shape when viewed from the front side of the vehicle is provided behind the rotation support mechanism 80 on the vehicle floor 100.

  A horizontal portion 111 of a bracket 110 having a substantially L-shape in front view (see FIG. 26) is fixed to the rear ends of the bottom plates 34 of the left and right lower rails 30. Further, a bracket 115 having substantially the same shape as viewed from the side is disposed outside the bracket 110. The hanging portion 112 and the bracket 115 of the bracket 110 are formed with entry grooves 113 and 116 that face substantially in the vertical direction, respectively. (See FIG. 1 to FIG. 3 and FIG. 27 for the entrance groove 116). The left and right brackets 110 and 115 and their peripheral members constitute a rotation lock mechanism LM shown in an enlarged manner in FIGS.

Next, the structure of the rotation lock mechanism LM will be described.
As shown in detail in FIGS. 16 to 27, the left and right rotation lock mechanism LM includes a hook 125 that can rotate around a rotation shaft 120 supported between the hanging portion 112 of the bracket 110 and the bracket 115, and the hook 125. A pole 135 positioned forward and supported between the hanging portion 112 and the bracket 115 and having an outer end projecting around the rotating shaft 130 projecting outside the bracket 115, and the rotating shaft 130 outside the bracket 115. A backrest interlocking rotating member 140 attached to be rotatable about the rotating shaft 130 and a pole control member 145 pivotally attached to the backrest interlocking rotating member 140 are provided.
The hook 125 is located between the left and right brackets 110 and 115, and includes an engagement groove 126 into which the striker 101 can enter, an engagement protrusion 127 that can be engaged with and disengaged from the pole 135, and a hanging portion 112 side. And a guide pin 128 projecting from the side surface. The hanging portion 112 is formed with an arc-shaped arc hole 114 centering on the rotation shaft 120 with which the guide pin 128 engages, and the rotation of the hook 125 in the counterclockwise direction is the right end surface of the arc hole 114. The guide pin 128 is restricted at the unlocked position (position in FIG. 18), and reaches the locked position (position in FIG. 16) by rotating clockwise from the unlocked position. With the striker 101 engaged with the engagement groove 126, the hook 125 moves to the lock position, so that the hook 125 locks the striker 101.

The pole 135 is also located between the left and right brackets 110 and 115 (overlapping with the hook 125 in the front-rear direction), and a non-engagement position where the hook 125 is not engaged (position in FIG. 20) and the middle An engaging position (position in FIG. 16) that prevents the hook 125 in the locked position from rotating to the unlocked position by the locking portion 136 formed on the hook portion coming into contact with the engaging protrusion 127 of the hook 125. Between the two. Further, an engagement pin 137 is provided on the outer surface of the pole 135 so as to face in the left-right direction. As shown in FIG. 27, the outer bracket 115 is formed with an arc hole 117 centering on the rotation shaft 130, and an engagement pin 137 is movably fitted in the arc hole 117. The outer end portion of the engagement pin 137 protrudes outside the bracket 115. When the pole 135 rotates around the rotation shaft 130, the engagement pin 137 moves along the arc hole 117 in the arc hole 117.
A tension spring S2 is stretched between the hook 125 and the pole 135. By the urging force of the tension spring S2, the hook 125 is urged to rotate counterclockwise in FIGS. It is urged to rotate in the direction.

  On the outside of the outer bracket 115, a backrest interlocking rotation member 140 having a substantially L shape in a side view is located, and a base end portion thereof is supported on the outer end portion of the rotation shaft 130 so as to be relatively rotatable. . Both ends of a torsion coil spring S3 (torsion spring) are hung between the backrest interlocking rotating member 140 and the bracket 115, and the backrest interlocking rotating member 140 is shown in FIG. It is urged to rotate clockwise in FIG.

  A rotation shaft 141 penetrating the backrest interlocking rotation member 140 in the left-right direction is rotatably provided at a corner (intermediate portion) of the backrest interlocking rotation member 140. As shown in FIG. 26, an intermediate portion of the pole control member 145 located between the backrest interlocking rotation member 140 and the bracket 115 is supported so as to be rotatable around the rotation shaft 141. The pole control member 145 includes a recess 146 that can be engaged with and disengaged from the engagement pin 137 of the pole 135, and a stopper surface 147 that can be brought into contact with and separated from a stopper pin SP (stopper) protruding from the hanging portion 112 of the bracket 110. It has. A torsion coil spring S4 is attached to the rotation shaft 141, and both ends thereof are respectively locked to the backrest interlocking rotation member 140 and the pole control member 145, and the pole control is performed by the biasing force of the torsion coil spring S4. The member 145 is urged to rotate counterclockwise in FIGS. 16 to 25 with respect to the backrest interlocking rotating member 140.

  As shown in FIGS. 16 to 26, through holes 35 and 110 a (see FIG. 26 for the through hole 110 a) are formed at positions where the bottom plate 34 of the lower rail 30 and the horizontal portion 111 of the bracket 110 face each other. Yes. The upper ends of the hook 125 and the pole 135 enter the inner space of the lower rail 30 through both the through holes 110 a and the through holes 35.

  As described above, the other end of the wire W1 whose one end is fixed to the lever RML is fixed to the outward mounting pin 142 protruding from the free end portion of the backrest interlocking rotating member 140. A substantially cylindrical wire support member 150 is supported on an inward mounting piece 118 formed at the front end portion of the outer bracket 115, and the left and right wires W <b> 1 pass through the inside of the wire support member 150. Since the backrest-linked rotating member 140 is urged to rotate by the torsion coil spring S3, the wire W1 is always in tension regardless of the position of the backrest 12.

Next, operations of the foldable sheet 10 having the above-described configuration and related mechanisms will be described.
FIG. 16 shows that the foldable seat 10 is located at a seating position in which the seat 11 (and the upper rail 20 and the lower rail 30) is substantially parallel to the entry groove 113, and the backrest 12 is in an upright position (FIG. 1). Reference: The rotation lock mechanism LM and the striker 101 when in a position substantially orthogonal to the seat portion 11 are shown. As shown in the figure, the striker 101 is engaged with the engagement groove 126 of the hook 125 in the lock position in the entry groove 113, and the pole 135 is engaged with the engagement protrusion 127 of the hook 125 in the engagement position. The locked state of the hook 125 and the striker 101 is maintained. The torsion coil spring S4 urges the pole control member 145 to rotate counterclockwise relative to the backrest interlocking rotation member 140, but the engagement pin 137 of the pole 135 is fitted into the recess 146 of the pole control member 145. Thus, the counterclockwise rotation of the pole control member 145 is restricted.

  In this state, when a holding release lever (not shown) provided on the backrest 12 is pressed, the reclining mechanism RM releases the holding of the backrest 12 in the upright position, so that the backrest 12 is the rotational biasing force of the spring means. , And the pressing pin P rotates the lever RML counterclockwise in FIG. Then, the wire W1 is pulled, and the backrest interlocking rotating member 140 rotates counterclockwise in FIGS. In conjunction with the movement of the wire W1, the backrest interlocking rotating member 140 and the pole control member 145 rotate counterclockwise against the biasing force of the torsion coil spring S3, and the recess 146 and the engaging pin 137 are moved. The pole 135 integrated with the pole control member 145 rotates counterclockwise, and the engagement between the engaging portion 136 of the pole 135 and the engaging protrusion 127 of the hook 125 is released as shown in FIG. Is done. When the engagement between the pole 135 and the hook 125 is released in this manner, the folding seat 10 (and the upper rail 20 and the lower rail 30) are jumped up around the pivot pin 92 by the rotational biasing force of the dumble spring 93 ( The striker 101 is released from the entry grooves 113 and 116 and the engagement groove 126, and the hook 125 is rotated to the unlock position by the biasing force of the tension spring S2 (see FIG. 18). ). Further, when the hook 125 and the striker 101 are disengaged in this way, the entire folding seat 10 continues to rotate forward by the rotational urging force of the dumble spring 93, and the pressing portion 84 of the rail side bracket 81 Since the contact surface 98a of the cable winding drum 96 is pressed, the cable winding drum 96 rotates counterclockwise around the pivot pin 92 in a side view, and the wire W2 is pulled forward. Then, the lock lever 43 rotates in a direction against the urging force of the tension spring S1, and both lock claws 46 of the lock lever 43 escape from the locking hole 23, the locking hole 31, the through hole 54, and the long hole 65. The movement of the upper rail 20 with respect to the lower rail 30 becomes free.

  When the backrest 12 is further rotated to the folding position side in the state of FIG. 18, the backrest interlocking rotation member 140 and the pole 135 further rotate counterclockwise, and as shown in FIG. 19, the stopper of the pole control member 145 The surface 147 contacts the stopper pin SP, and the rotation of the pole control member 145 around the rotation shaft 130 is restricted.

  When the backrest 12 is further rotated to the folding position side from this state, as shown in FIG. 20, the backrest interlocking rotating member 140 and the pole 135 are further rotated counterclockwise, while the pole control member 145 is the rotation axis. The recesses 146 of the pole control member 145 attempt to escape from the engagement pins 137 by rotating relative to the back-linking interlocking rotation member 140 in the clockwise direction around 141.

  When the backrest 12 is further rotated to the folding position side, as shown in FIG. 21, the backrest interlocking rotation member 140 and the pole 135 further rotate counterclockwise, and the recess 146 of the pole control member 145 is engaged. Since the pin 137 is completely removed and the pole control member 145 and the pole 135 are released from the integrated state, the pole 135 is rotated clockwise by the urging force of the tension spring S2, and the rear surface thereof is the engagement protrusion of the hook 125. 127 abuts.

  When the backrest 12 is further rotated forward and moved to the folding position, the backrest 12 is held in the folding position by abutting against the seat portion 11, and as shown in FIG. It further rotates counterclockwise from the position shown in FIG. Then, the entire folding seat 10 is rotated to a jumping position that is substantially perpendicular to the vehicle floor surface 100 by the rotational biasing force of the dumble spring 93, and the upper rail 20 and the upper rail 20 are caused by the dead weight of the folding seat 10 and the upper rail 20. The upper rail 20 slides downward with respect to the lower rail 30 until stoppers (not shown) provided between the lower rails 30 come into contact with each other, and the front end portion of the folding seat 10 is positioned in the recess 100A (see FIG. 3). ).

While the backrest 12 is held in the folded position, the entire folding seat 10 is rotated rearward around the pivot pin 92 against the rotational biasing force of the dumble spring 93, and the seat 11 is the vehicle floor 100. When the striker 101 reaches a seating position that is substantially parallel to the hook 125, the hook 125 rotates clockwise while the striker 101 engages the engagement groove 126, and the hook 125 reaches the lock position, whereby the hook 125 locks the striker 101. . Further, since the pole 135 is automatically moved to the engagement position by the urging force of the tension spring S2 and is engaged with the engagement protrusion 127, the lock state of the striker 101 by the hook 125 is held by the pole 135 (FIG. 23). reference).
Further, when the entire folding seat 10 is rotated to the seating position side in this way, the cable take-up drum 96 rotates clockwise in a side view with the rotation of the rail side bracket 81 (pressing portion 84), and the tension spring The lock lever 43 is rotated to the lock position by the urging force of S1, and both the lock claws 46 are fitted into the lock holes 23, the lock holes 31, the through holes 54, and the long holes 65, so that the upper rail 20 (folding) The longitudinal movement (sliding) of the expression sheet 10) with respect to the lower rail 30 becomes impossible.

  When the backrest 12 is rotated to the standing position side (rear) in this state, the backrest interlocking rotating member 140 is rotated in the clockwise direction of FIG. 23 by the biasing force of the torsion coil spring S3, and pole control is performed as shown in FIG. The end of the member 145 on the recess 146 side starts to contact the peripheral surface of the engagement pin 137. Then, as shown in FIG. 25, the pole control member 145 is counterclockwise with respect to the backrest-linked rotating member 140 by the urging force of the torsion coil spring S4 while the tip of the pole control member 145 is in sliding contact with the peripheral surface of the engagement pin 137. When the tip of the pole control member 145 eventually gets over the engagement pin 137, the engagement pin 137 is fitted into the recess 146, and the rotation lock mechanism LM returns to the initial state shown in FIG.

Thus, according to the present embodiment, when the holding release lever of the reclining mechanism RM provided on the backrest 12 is pressed, the rotation lock mechanism LM is unlocked in conjunction with the rotation of the backrest 12 toward the folding position. Then, the entire folding seat 10 is rotated to the jumping-up position side by the rotational urging force of the dumble spring 93, and the slide lock mechanism SLM is unlocked in conjunction with this rotation, so that the folding seat 10 is removed from the use state. It is possible to automatically shift to the folded state.
Moreover, when the foldable seat 10 (upper rail 20 and lower rail 30) rotates to the jumping position, the upper rail 20 (foldable seat 10) automatically moves downward (forward) with respect to the lower rail 30 by its own weight ( Therefore, the folding seat 10 can be moved forward (downward) more reliably than in the prior art document in which the folding seat 10 is moved forward by the biasing force of the spring means built in the rail device. It is moved to the end.
Further, since the rail device does not incorporate spring means as in the prior art document, the slide lock mechanism SLM is operated manually by operating the lock lever 43 when the foldable seat 10 is in use (normal seating state). When the lock is released, the folding seat 10 (upper rail 20) can be moved in the front-rear direction with a lighter force than the device of the prior art document.

The present invention is not limited to this embodiment, and can be implemented in various modes. For example, a rotation lock mechanism LM is provided on the vehicle floor surface 100 (the backrest interlocking rotation member 140 and the backrest 12 of the rotation lock mechanism LM are linked by a wire W1), and the striker 101 is disposed on the foldable seat 10 side. May be provided. Further, the recess 146 may be provided on the pole 135 side, and the engagement pin 137 may be provided on the pole control member 145 side. Further, the tension spring S1, the tension spring S2, the torsion coil spring S3, and the torsion coil spring S4 may be implemented in place of spring means having other structures having the same function as these.
Further, when the folding seat 10 and the upper rail 20 slide relative to the lower rail 30 to the front moving end due to their own weight, a damper (not shown) that acts as a buffer between the upper rail 20 and the lower rail 30 is provided. It may be provided between the upper rail 20 and the lower rail 30.
Further, when the entire folding seat 10 is rotated to the jumping position, a spring biasing means (not shown) that has a very weak biasing force for helping the folding seat 10 and the upper rail 20 slide downward along the lower rail 30. May be provided between the upper rail 20 and the lower rail 30. Since the urging force of such a spring means hardly resists the sliding movement of the folding seat 10 (upper rail 20) in the use state (normal seating state), even if such a spring means is provided, the use state It is possible to lightly slide the foldable sheet 10 located in the area.

It is a side view which shows the use condition of the folding sheet | seat to which this invention is applied. It is a side view which shows the state which moved the backrest of the folding sheet | seat to the folding position. It is a side view which shows the raising state of a folding sheet | seat. It is an enlarged side view of a folding sheet. It is sectional drawing of a rail apparatus. It is a top view of the slide lock mechanism vicinity of a rail apparatus. It is a side view of the slide lock mechanism vicinity of a rail apparatus. It is sectional drawing which follows the VIII-VIII arrow line of FIG. It is sectional drawing which follows the IX-IX arrow line of FIG. It is sectional drawing which follows the XX arrow line of FIG. It is a side view of a retainer. It is sectional drawing which follows the XII-XII arrow line of FIG. It is sectional drawing which follows the XIII-XIII arrow line of FIG. It is an expansion exploded perspective view of a rotation support mechanism and its peripheral member. It is a cross-sectional view of a rotation support mechanism. It is an expanded side view which fractures | ruptures an outer bracket and shows a lock mechanism and striker when a folding sheet is in use. FIG. 17 is an enlarged side view showing the lock mechanism and the striker when the backrest is rotated forward from the state of FIG. FIG. 18 is an enlarged side view showing the locking mechanism when the entire folding sheet 10 is rotated forward in the state of FIG. 17 by breaking the outer bracket. FIG. 19 is an enlarged side view showing the locking mechanism when the backrest is further rotated forward from the state of FIG. 18 by breaking the outer bracket. FIG. 20 is an enlarged side view showing the locking mechanism when the backrest is further rotated forward from the state of FIG. 19 by breaking the outer bracket. FIG. 21 is an enlarged side view showing the locking mechanism when the backrest is further rotated forward from the state of FIG. 20 and the integrated state of the pole control member and the pole is released, with the outer bracket broken. FIG. 22 is an enlarged side view showing the locking mechanism when the backrest is further rotated forward from the state of FIG. 21 and the backrest is moved to the folding position, with the outer bracket broken. FIG. 23 is an enlarged side view showing a state in which the entire folding sheet is returned to the seating position from the state of FIG. 22 and the striker is locked by the lock mechanism, with the outer bracket broken. FIG. 6 is an enlarged side view showing the lock mechanism and the striker when the backrest is rotated to the upright position side after the striker is locked by the lock mechanism, with the outer bracket broken away. FIG. 25 is an enlarged side view showing the lock mechanism and the striker when the backrest is further rotated from the state of FIG. 24 to the standing position side, with the outer bracket broken. It is sectional drawing of the locking mechanism in alignment with the XXVI-XXVI line of FIG. FIG. 5 is an enlarged side view showing the lock mechanism and the striker when the folding sheet is in use, omitting the backrest interlocking rotation member and the pole control member without breaking the outer bracket.

Explanation of symbols

10 Folding sheet (sheet)
11 Seat part 12 Back 20 Upper rail 21 Widening rise inclination part 22 Shrinkage rise inclination part 23 Locking hole 30 Lower rail 31 Locking hole 32 33 Side space 34 Bottom plate 35 Through hole 40 Slide lock mechanism 41 Bracket 42 Pivoting pin 43 Lock lever 44 Knob 45 Lock hole 46 Lock claw 47 Long hole 48 Lock hole 49 Bracket 50 Protrusion 51 Guide pin 52 Hanging piece 53 Lock hole 54 Through hole 60 Retainer 61 62 Supporting recess 63 64 Ball 65 Long Hole 70 Seat cushion frame 80 Rotation support mechanism 81 Rail side bracket 82 Side piece 83 Through hole 84 Press part 86 Floor side bracket 87 Side piece 88A 88B Through hole 89 Bottom part 90 Mounting hole 91 Locking pin 92 Pivoting pin 92a Non-circular Cross section 93 Dumble spring 94 Annular part 95 End part 96 Winding drum 97 Mounting hole 98 Flange 98a Abutting surface 99 Winding surface 100 Vehicle floor surface 100A Recess 101 Striker 110 Bracket 110a Through hole 111 Horizontal portion 112 Suspended portion 113 Entrance groove 114 Arc hole 115 Bracket 116 Entrance groove 117 Arc hole 118 Installation piece 120 Rotating shaft 125 Hook 126 Engaging groove 127 Engaging projection 128 Guide pin 130 Rotating shaft 135 Pole 136 Locking portion 137 Engaging pin 140 Backrest interlocking rotating member 141 Rotating shaft 142 Mounting pin 145 Pole control member 146 Recess 147 Stopper Surface 150 Wire support member B1 Bolt B2 Bolt B3 Bolt LM Rotation lock mechanism P Press pin RM Reclining mechanism RMA Rotating shaft RML Lever S1 Tensile spring S1a Engaging part S1b Engaging part S2 Tensile spring S3 Torsion coil spring (torsion spring)
S4 Torsion coil spring (torsion spring)
SP Stopper pin W1 wire (reclining / lock interlocking means)
W2 wire (rotation / slide interlocking means) (first wire)

Claims (3)

The lower rail, which supports the upper rail so as to be slidable in the front-rear direction, has a seating position that is substantially parallel to the vehicle floor surface and a jump that is substantially perpendicular to the vehicle floor surface, centered on one of the front and rear ends. A rotation support mechanism that is rotatable between an upper position and that urges the lower rail to rotate toward the jumping position;
A rotation lock mechanism that locks or unlocks the lower rail to the vehicle floor surface to prevent or allow rotation by the rotation support mechanism when the lower rail is in the sitting position;
A slide lock mechanism for locking or unlocking the relative sliding of the upper rail and the lower rail;
The seat back of the seat fixed to the upper rail can be rotated between the folding position and the standing position, and the backrest can be urged to rotate to the folding position. A reclining mechanism for holding or releasing the holding in the standing position;
When releasing the holding of the backrest in the standing position by the reclining mechanism and rotating the backrest to the folding position side, the rotation lock mechanism is unlocked in conjunction with the rotation, and the rotation Reclining lock interlocking means for allowing the lower rail to rotate to the jumping position by the rotational biasing force of the support mechanism;
When the lower support rail rotates the lower rail to the jump position side, the slide lock mechanism is unlocked in conjunction with the rotation, and the upper rail moves downward along the lower rail by its own weight. A foldable vehicle seat device comprising: rotation / slide interlocking means that allows movement to the end. In the foldable vehicle seat device according to claim 1,
The rotation lock mechanism provided on one of the seat portion and the vehicle floor surface,
A hook that is rotatable between a lock position for gripping a striker provided on the other side of the seat and the vehicle floor, and a lock release position for releasing the striker;
An engagement position that engages with the hook at the lock position and prohibits the hook from rotating toward the unlock position, and allows the hook to rotate toward the unlock position away from the hook A foldable vehicle seat device comprising: a pole that is rotatable between a non-engaging position. In the foldable vehicle seat device according to claim 1 or 2,
The rotation / slide interlocking means pulls the first wire when the rotation support mechanism rotates the lower rail to the jumping position when the rotation support mechanism rotates the lower rail to the jumping position. A foldable vehicle seat device comprising: a wire pulling mechanism that unlocks the slide lock mechanism.

Images