JP2015140152A - Folding seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a folding seat capable of enhancing a space efficiency when folding and improving the attitude holding property of an occupant when seating with simple constitution.SOLUTION: A front side seat cushion part 12A of a seat cushion 12 is made to be swingable by a swinging mechanism. In a seating state, an attitude holding property of an occupant P can be improved by swinging the front side seat cushion part 12A so that the front side seat cushion part 12A pops up. In conversion from a seating possible state to a folding state, a front end side of the seat cushion part 12A is lowered when folding a seat back 14 forward. By lowering the front end side of the seat cushion part 12A, a position of an upper end of a seat back (in a standing state) is also lowered in such a state as folding the seat back 14 forward to upfold on the seat cushion 12, and it is possible to improve space efficiency by bringing an upper surface (a back face in a standing state) of the seat back 14 folded forward into a nearly horizontal state.

Description

  The present invention relates to a folding sheet.

Folding seats are used in passenger seats in the third row of minivans to increase the volume of the cargo compartment.
Folding sheets are folded and stored under the floor or on the side walls of the passenger compartment, and since the thickness of the folding sheets affects the volume of the luggage compartment at that time, the thickness is being reduced. Therefore, the seat angle and seat shape of the seat are often flat and may not match the seating posture of the occupant.
As conventional folding sheets, for example, folding sheets disclosed in Patent Documents 1 and 2 are known.

JP 2009-120084 A JP 2009-126439 A

However, in the conventional example described in Patent Document 1 above, when the seat is folded, the seat cushion moves forward and downward in conjunction with the forward tilting of the seat back. There is room for improvement in terms of volume expansion.
Further, in the conventional example described in Patent Document 2, when the seat is folded, the seat cushion is lowered in conjunction with the forward tilting of the seat back, but the front end side of the seat cushion is compared with the rear end side in order to maintain the posture of the occupant. Therefore, since the inclination angle does not change and the inclination angle does not change, the seat back folded on the seat cushion also inclines, and there is room for improvement in terms of expanding the volume of the luggage compartment. In addition, the mechanism for moving the seat cushion up and down in conjunction with the forward movement of the seat back is complicated, and there is room for improvement in terms of the mechanism.

  In consideration of the above-described facts, an object of the present invention is to provide a folding seat that has a simple configuration, improves space efficiency during folding, and can improve the posture retention of an occupant when it can be seated.

  The folding seat according to claim 1 is configured as a seat cushion in which a front seat cushion portion and a rear seat cushion portion are connected by a hinge so that an occupant can be seated, and a backrest of the occupant. A seat back configured to be able to be moved forward, a seat cushion frame disposed below the seat cushion, the front seat cushion portion and the seat cushion frame are connected, and the front seat cushion portion is swung in the vertical direction. A rocking mechanism to be moved.

In the folding seat according to the first aspect, the seat arrangement can be changed between a seatable state in which the seat back is erected and a folded state in which the seat back is moved forward and stacked on the seat cushion.
In the seatable state, the front seat cushion portion is tilted so that the front end side of the front seat cushion portion is positioned higher than the rear end side, so that the occupant's thigh retention can be improved. Posture retention can be improved.
When the seatable state is changed to the folded state, the front seat cushion portion is swung by the swing mechanism so that the front end side of the front seat cushion portion is lowered when the seat back is tilted forward. As a result, the position of the upper end of the seat back (in a standing state) is lowered in a state where the seat back is folded forward and folded on the seat cushion, and the upper surface (the back surface in the standing state) of the forward tilted seat back is brought closer to the horizontal. Space efficiency can be improved.

  According to a second aspect of the present invention, in the folding seat according to the first aspect, the hinge is provided behind a central portion in the front-rear direction of the front seat cushion portion.

In the folding seat according to claim 2, since the hinge is provided on the rear end side with respect to the front-rear direction center portion of the front seat cushion portion, the seat cushion has a front end side portion relative to the hinge, that is, the front seat cushion portion. The length in the front-rear direction of the seat is longer than the length of the rear end side portion of the seat, that is, the length of the rear seat cushion portion in the front-rear direction of the seat.

  According to a third aspect of the present invention, in the folding seat according to the first or second aspect, the seat back and the swinging mechanism are connected, and the swinging mechanism is moved along with a forward tilting operation of the seat back. An operating force transmission member that operates to move the front end of the front seat cushion portion downward is provided.

  In the folding seat according to the third aspect, when the seat back is tilted forward, the operating force transmission member operates the swing mechanism in accordance with the forward tilting operation of the seat back, and moves the front end of the front seat cushion portion downward.

  According to a fourth aspect of the present invention, in the folding seat according to the third aspect of the present invention, the folding seat includes a biasing member that biases the swing mechanism and moves the front end side of the front seat cushion portion upward.

  The folding seat according to claim 4, wherein the urging member urges the swing mechanism to move the front end side of the front seat cushion portion upward, so that the front seat is manually turned upside down by manually inverting the seat back. The front end side of the front seat cushion portion can be moved upward without operating the cushion portion.

  According to a fifth aspect of the present invention, in the folding seat according to the first or second aspect of the present invention, the folding seat includes a biasing member that biases the front end side of the front seat cushion portion upward.

  In the folding seat according to claim 5, in order to urge the front end side of the front seat cushion portion upward and move the front end side of the front seat cushion portion upward, by manually turning up the forward-turned seat back, The front end side of the front seat cushion portion can be moved upward without operating the front seat cushion portion.

  According to a sixth aspect of the present invention, in the folding seat according to any one of the first to fifth aspects, the swing mechanism is disposed on the front end side of the seat cushion with respect to the hinge, and one end is a front seat. A first link connected to the cushion portion side and swinging around one end side, and one end connected to the seat cushion frame side and swinging around one end side, and the other end connected to the first link And a second link that is connected to the other end and swings with respect to the first link.

In the folding seat according to claim 6, the swing mechanism is disposed on the front end side of the seat cushion with respect to the hinge, and one end is connected to the front seat cushion portion side and swings around the one end side. , One end is connected to the seat cushion frame side, swings about the one end side, and the other end includes a second link connected to the other end of the first link. By moving the first link and the second link closer to a straight line, the distance between one end of the first link and one end of the second link is increased, and the front end side of the front seat cushion portion is moved upward. By reducing the angle between the first link and the second link, the distance between one end of the first link and one end of the second link is made closer, and the front end side of the front seat cushion portion is Can be lowered.
Since the swing mechanism is configured by the first link and the second link coupled to the first link, the configuration can be simplified.

  According to a seventh aspect of the present invention, in the folding sheet according to the sixth aspect, the operating force transmission member is a cable that pulls down the first link and the second link by a forward-folding operation of the seat back.

  In the folding sheet according to claim 7, when the seat back is moved forward, the cable pulls down the first link and the second link to bring the distance between one end of the first link and one end of the second link closer. Thus, the front end side of the front seat cushion portion can be lowered.

  The folding seat according to claim 8 is configured as a seat cushion on which an occupant can be seated, a seat back configured as a backrest of the occupant, and configured to be able to be tilted forward from a standing state toward the seat cushion, and below the seat cushion A seat cushion frame to be disposed; a seat provided behind the seat front end side of the seat cushion; and a hinge that allows the seat cushion to swing up and down; and connects the seat cushion and the seat cushion frame; A rocking mechanism for rocking the seat cushion in the vertical direction.

In the folding seat according to the eighth aspect, the seat arrangement can be changed between a seatable state in which the seat back is erected and a folded state in which the seat back is moved forward and stacked on the seat cushion.
In the seatable state, the retainability of the thigh of the occupant can be improved by inclining the seat cushion so that the front end side of the seat cushion is positioned above the rear end side.
When changing from the seatable state to the folded state, the seat cushion is swung by the swing mechanism so that the front end side of the seat cushion is lowered when the seat back is tilted forward. As a result, the position of the upper end of the seat back (in a standing state) is lowered in a state where the seat back is folded forward and folded on the seat cushion, and the upper surface (the back surface in the standing state) of the forward tilted seat back is brought closer to the horizontal. Space efficiency can be improved.

  As described above, according to the folding seat of the first aspect, the space efficiency at the time of folding can be improved with a simple configuration, and the posture retention of the occupant can be improved in the sitting state. Excellent effect is obtained.

  According to the folding seat of claim 2, the length of the front seat cushion portion in the front-rear direction of the seat is longer than the length of the rear seat cushion portion in the front-rear direction of the seat, improving the thigh of the occupant. It has the outstanding effect that it can be made to do.

  According to the folding seat of the third aspect, the seat cushion can be moved from the first inclined position to the second inclined position by a simple operation of moving the seat back forward, thereby improving operability. It has the excellent effect of being able to.

  According to the folding seat of the fourth aspect, the front seat cushion part can be moved to the front end side of the front seat cushion part without manually operating the front seat cushion part by operating the seat back that has been tilted forward. It has the outstanding effect that it can improve property.

  According to the folding seat of claim 5, the front seat cushion portion can be moved to the front end side of the front seat cushion portion without manually operating by inverting the forward-turned seat back. It has an excellent effect that it can be improved.

  According to the folding sheet of the sixth aspect, there is an excellent effect that the configuration of the swing mechanism can be simplified by two links.

  According to the folding sheet | seat of Claim 7, it has the outstanding effect that operation force can be transmitted with a simple structure called a cable.

  According to the folding seat of the eighth aspect, it is possible to improve the space efficiency at the time of folding with a simple configuration, and it is possible to obtain an excellent effect that the posture retention of the occupant can be improved in the sitting state. .

(A) is a side view showing a folded sheet when the seat arrangement is in a seatable state, and (B) is a side view showing the folded sheet when the seat arrangement is in a retracted state. It is a perspective view which shows the internal structure of a folding sheet | seat when a seat arrangement is a boarding / alighting state. It is a side view which shows the front end side of a folding seat when a seat arrangement is a seatable state. It is a side view which shows the front-end side at the time of the seatable state of the folding seat which concerns on 2nd Embodiment. It is a side view which shows the front-end side at the time of the seatable state of the folding seat which concerns on 3rd Embodiment. It is a side view which shows the front-end side at the time of the seatable state of the folding seat which concerns on 4th Embodiment.

[First Embodiment]
Hereinafter, the folding sheet 10 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 3. In the drawing, the arrow UP indicates the upward direction in the seat vertical direction, and the arrow FR indicates the forward direction in the seat longitudinal direction.

  As shown in FIG. 1, the folding seat 10 according to the present embodiment has a seat cushion 12 and a seat back 14. As shown in FIG. (Not shown) that can be seated, and a retracted state in which the seat back 14 is tilted forward and the seat back 14 is superimposed on the upper side of the seat cushion 12 as shown in FIG. . In addition, although the headrest 14A that can be slid up and down is attached to the seat back 14, the headrest 14A may be a fixed type, and the headrest 14A may not be provided in some cases.

  The seat cushion 12 is a component that constitutes a seating surface on which an occupant can be seated. As shown in FIGS. 1 and 2, the seat cushion 12 includes a seat cushion frame 16 that is attached to a floor 17 of a vehicle body via an attachment member 15. Have. The seat cushion frame 16 is configured to include a frame body 18 having a substantially rectangular frame shape and a sub frame 20, for example. For example, a net-like spring (not shown) is stretched on the frame body 18 and the subframe 20. The seat cushion frame 16 is covered with cushion materials 22 and 24 covered with a seat skin. The cushion material 22 covers the sub-frame 20, and the cushion material 24 covers the frame body 18 on the seat rear end side with respect to the sub-frame 20.

  In the present embodiment, the seat cushion 12 is a portion where the cushion material 22 is arranged, and the sub-frame 20 and the cushion material 22 constitute the front seat cushion portion 12A. Further, the rear seat cushion portion 12B is a portion where the cushion material 24 is disposed and a portion of the cushion material 24 and the frame main body 18 that is located on the rear side of the seat with respect to a shaft 28 (hinge) described later. It is configured. In addition, the cushion material 24 of this embodiment is formed so that an upper surface may become substantially horizontal.

  As shown in FIGS. 1 and 3, the frame body 18 is integrally formed with a bearing 26 on the seat rear end side slightly from the center portion in the front-rear direction of the seat cushion 12. The bearing 26 supports the end of the sub-frame 20 on the rear end side of the sub-frame 20 via a shaft 28. The sub-frame 20 has an arrow A direction and an arrow so that the front end of the seat moves up and down about the shaft 28. It can swing in the direction opposite to the A direction.

  A bearing 30 is attached to the front frame portion 18 </ b> A of the frame body 18, and one end of the lower link 34 is supported on the bearing 30 via a shaft 32. The lower link 34 can swing around the shaft 32 in the direction of arrow B and in the direction opposite to the direction of arrow B.

  A bearing 36 is attached to the front frame portion 20 </ b> A of the subframe 20, and one end of the upper link 40 is supported on the bearing 36 via a shaft 38. The upper link 40 can swing around the shaft 38 in the direction of arrow C and in the direction opposite to the direction of arrow C.

  The other end of the lower link 34 and the other end of the upper link 40 are connected via a shaft 42, and the lower link 34 and the upper link 40 can swing around the shaft 42. .

As shown in FIG. 3, a stopper block 44 is attached to the front frame portion 18 </ b> A of the frame main body 18 so as to contact the lower link 34 and limit the swing of the lower link 34 toward the seat front end side. . As shown in FIGS. 1A and 3, when the seat cushion 12 is in a seatable state, the lower link 34 is in contact with the stopper block 44, and the shaft 42 is connected to the lower link 34. The upper end side of the upper link 40 is positioned closer to the front side of the seat than the lower end side to which the shaft 32 is connected, and the upper link 40 has a lower end side to which the shaft 42 is connected to the seat than the upper end side to which the shaft 38 is connected. It is located on the front end side, and the sub-frame 20 is inclined so that the front end side end portion of the seat is positioned above the end portion on the rear end side of the seat.
Therefore, when a downward load is applied to the subframe 20, a rotational force in the direction of arrow C is generated in the upper link 40, and a rotational force in the direction of arrow B is generated in the lower link 34. Since the rotation in the direction of arrow B is prevented by contacting the stopper block 44, the subframe 20 is prevented from descending (swinging in the direction of arrow A).

  On the other hand, as shown in FIG. 1B, when the seatback 14 is in the retracted state, the shaft 42 that connects the lower link 34 and the upper link 40 is the shaft 32 on the frame body side of the lower link 34, And the seat of the subframe 20 as compared to the case where the seatback 14 shown in FIG. The front end side is located below the sheet rear end side.

  As shown in FIG. 3, a torsion spring 46 is attached to the shaft 32. The torsion spring 46 has one end locked to the lower link 34 and the other end locked to the bearing 30, and urges the lower link 34 in a direction (arrow B direction) that hits the stopper block 44. The torsion spring 46 has a biasing force (rotational force) that can move the lower link 34 in the direction of arrow B to move the front end side of the front seat cushion portion 12A upward.

  As shown in FIGS. 1 and 2, the seat back 14 is a component that has a seat back frame 26 and is provided on the frame body 18 via a reclining mechanism 47 so that the inclination angle can be adjusted, and that constitutes the back of the occupant. is there.

  The seat back frame 26 includes side frames 26A provided on both sides in the vehicle width direction, and upper pipes 26B that connect the upper portions of the side frames 26A.

  For example, a net-like spring (not shown) is stretched on the side frame 26A. The seat back frame 26 is covered with a cushion material 48 covered with a seat skin.

  The frame main body 18 is integrally formed with a bearing 50 at an end portion on the seat rear end side. A hinge shaft 52 is attached to the bearing 50, and the seat back frame 26 operates in the direction of arrow D around the hinge shaft 52 by operating the operation lever 54 of the reclining mechanism 47, and the direction opposite to the arrow D direction. Is swingable.

  As shown in FIG. 1, a pulley 56 arranged coaxially with the hinge shaft 52 is attached to the side frame 26 </ b> A. One end of the inner cable 60 inserted and supported by the outer cable 58 is wound around the pulley 56, and one end of the inner cable 60 is fixed to the pulley outer peripheral portion by a fixing member 62. The other end of the inner cable 60 is connected to a shaft 42 that connects the upper link 40 and the lower link 34 via a metal fitting 64. For this reason, in the process in which the seat back 14 in the seatable state shown in FIG. 1 (A) is tilted forward to the retracted state shown in FIG. 1 (B), the pulley 56 swings in the direction of the arrow D to move the inner cable. 60 is pulled out to the seat back side. As a result, the shaft 42 connecting the upper link 40 and the lower link 34 is moved to the seat rear end side, and the front end side of the raised subframe 20 is lowered.

(Function, effect)
This embodiment is configured as described above, and the operation thereof will be described below. As shown in FIG. 1 (A), in the folding seat 10 when the seat arrangement is in the seatable state, the lower link 34 biased by the torsion spring 46 comes into contact with the stopper block 44 and rises. The front end side of the seat 20 is inclined so as to be positioned above the rear end side of the seat. Accordingly, the upper surface of the front seat cushion portion 12A (the upper surface of the cushion material 22) is also inclined so that the front end side of the seat is positioned higher than the rear end side.

  When the occupant P is seated on the seat cushion 12, the butt (pelvis) of the occupant P rests on the rear seat cushion portion 12B whose upper surface is substantially horizontal, and the thigh PT of the occupant P It is placed on the seat cushion portion 12A.

  Since the thigh PT of the occupant P seated on the seat cushion 12 is inclined so that the knee side is on the upper side than the butt portion side, the front seat cushion portion 12A is inclined as shown in FIG. In addition, the upper surface of the cushion material 22 of the front seat cushion portion 12A can be brought into contact with the entire lower surface of the thigh PT, and the retention of the thigh PT is improved.

  Next, to change from the seatable state to the retracted state, the seat back 14 is moved forward. By tilting the seat back 14 forward, the inner cable 60 is pulled to the seat back side, the lower link 34 swings in the direction opposite to the arrow B direction, and the upper link 40 moves in the direction opposite to the arrow C direction. As shown in FIG. 1B, the lower link 34 and the upper link 40 are folded, and the seat front end side of the subframe 20 is lowered below the seat rear end side. As a result, the upper surface of the cushion material 22 of the front seat cushion portion 12A also becomes substantially horizontal with the front end side of the seat lowered, and the front-back seat back 14 is folded over the seat cushion.

  Since the seat back 14 overlaps the cushion material 22 of the front seat cushion portion 12A with the seat front end side lowered, the upper surface of the seat back 14 facing upwards (can be seated) as compared with the case where the seat front end side does not go down. In the state, the rear surface of the rear end side of the sheet can be made closer to the horizontal. Thereby, compared with the case where the front end side of 12 A of front side seat cushion parts does not fall, it becomes possible to expand the space of the vehicle interior which has arrange | positioned the folding seat 10. FIG. Further, since the front seat cushion portion 12A does not slide back and forth, it is not necessary to take extra space before and after the front seat cushion portion 12A.

  Thus, in the folding seat 10 of the present embodiment, in the seatable state, the front end side of the front seat cushion portion 12A can be moved upward to improve the retention of the thigh PT, and the seat back 14 Since the front end side of the front seat cushion portion 12A can be lowered along with the forward tilting operation, the operation is compared with the case where the forward tilting operation of the seat back 14 and the operation of lowering the front end side of the front seat cushion portion 12A are performed separately. Can be improved.

  When returning the seat arrangement from the boarding / alighting state to the seatable state, the seat back 14 may be raised. Since the lower link 34 is urged in the direction of arrow B by the torsion spring 46, a tension acts on the inner cable 60 toward the lower link side. For this reason, when the seat back 14 is raised, the inner cable 60 is pulled out to the lower link side, the lower link 34 rotates in the arrow B direction and hits the stopper block 44, and the front end side of the front seat cushion portion 12A is directed upward. Moves and the seat arrangement returns to the seatable state.

[Second Embodiment]
Hereinafter, according to FIG. 4, the folding sheet 10 which concerns on the 2nd Embodiment of this invention is demonstrated. In addition, the same code | symbol is attached | subjected to the same structure as 1st Embodiment, and the description is abbreviate | omitted.
As shown in FIG. 4, in the folding sheet 10 of the present embodiment, a shaft 66 is attached to the subframe 20, and a link 68 is swingably supported on the shaft 66.
A shaft 70 is attached to the lower end of the link 68, and a roller 72 is rotatably supported on the shaft 70. The roller 72 supports a load from the sub-frame 20 via the link 68 and rolls on a rail 74 provided in the frame body 18 and extending in the front-rear direction of the seat.

  A pin 76 is fixed to an intermediate portion of the link 68. One end of a tension coil spring 78 is locked to the pin 76, and the other end of the tension coil spring 78 is locked to the front frame portion 18 </ b> A of the frame body 18. The link 68 is urged in the direction of arrow E by a tension coil spring 78. The tension coil spring 78 has an urging force capable of moving upward on the front end side of the front seat cushion portion 12A.

  A stopper block 80 is attached to the rail 74, and the rotation of the link 68 in the direction of arrow E is restricted by the roller 72 coming into contact with the stopper block 80, so that the seat cushion 12 can be seated. In some cases, the roller 72 is in contact with the stopper block 80.

  In a state where the roller 72 is in contact with the stopper block 80, the link 68 is inclined so that the lower shaft 70 is positioned on the front side of the sheet with respect to the upper shaft 66. The link 68 does not rotate in the direction of the arrow E even when a load from is applied, and thus the front end side of the subframe 20 is not lowered.

  Further, the other end of the inner cable 60 is attached to the pin 76 of the link 68 via the metal fitting 64, and the link 68 is pulled to the rear end side of the seat by the inner cable 60. The roller 72 rotates in the direction opposite to the arrow E direction, and the roller 72 rolls on the rail 74 toward the sheet rear end side.

  As in the first embodiment, the folding seat 10 of the present embodiment configured as described above is configured such that when the seat back 14 is moved forward in order to change from the seatable state to the retracted state, the inner cable 60 is moved to the seat back side. As a result, the link 68 swings in the direction opposite to the direction of arrow E, and the seat front end side of the subframe 20 is lowered below the seat rear end side. As a result, the upper surface of the cushion material 22 covering the subframe 20 is also lowered at the front end side of the seat, and the forward-back seat back 14 is folded over the seat cushion.

  When returning the seat arrangement from the boarding / alighting state to the seatable state, the seat back 14 may be raised. Since the link 68 is urged in the arrow E direction by the tension coil spring 78, when the seat back 14 is raised, the inner cable 60 is pulled out to the lower link side, and the link 68 rotates in the arrow E direction. The roller 72 hits the stopper block 80, the front end side of the subframe 20 is lifted, and the seat arrangement returns to the seatable state.

[Third Embodiment]
Hereinafter, according to FIG. 5, the folding sheet | seat 10 which concerns on the 3rd Embodiment of this invention is demonstrated. In addition, the same code | symbol is attached | subjected to the same structure as embodiment mentioned above, and the description is abbreviate | omitted.
As shown in FIG. 5, in the folding sheet 10 of the present embodiment, a sector gear 82 is attached to the subframe 20. The center of the radius of curvature of the sector gear 82 is the axis of the shaft 28.

  A shaft 84 is attached to the frame body 18, and a spur gear 86 that meshes with the sector gear 82 is rotatably supported on the shaft 84. A pulley 88 is fixed to the spur gear 86. When the pulley 88 rotates, the sector gear 82 moves in the vertical direction, and the front end side of the subframe 20 moves in the vertical direction. .

  A compression coil spring 90 is disposed between the front frame portion 18A of the frame main body 18 and the front frame portion 20A of the subframe 20, and the compression coil spring 90 faces the front end side of the front seat cushion portion 12A upward. It has a movable urging force.

  A part of the inner cable 60 is wound around the pulley 88 and the end portion of the inner cable 60 is locked via a metal fitting 92, and the inner cable 60 is pulled toward the seat back, The pulley 88 rotates in the direction of arrow F.

  In addition, a shaft 94 is attached to the frame body 18 between the sector gear 82 and the shaft 28, and a link 96 is rotatably supported on the shaft 94. A shaft 98 is attached to the lower end of the link 96, and the roller 100 is rotatably supported on the shaft 98. The roller 100 supports a load from the sub-frame 20 covered with the cushion material 22 and rolls on a horizontal rail 102 provided on the frame main body 18.

One end of the tension coil spring 104 is locked to the middle portion in the longitudinal direction of the link 96, and the other end of the tension coil spring 104 is engaged with the metal fitting 106 attached to the rail 102 on the seat back side from the link 96. It has been stopped. The link 96 is urged in the direction of arrow G by the tension coil spring 104. In the seatable state shown in the figure, the roller 100 abuts against a stopper block 108 provided on the rail 102, and the arrow of the link 96 The rotation angle in the G direction is limited.
In the seatable state shown in the figure, the link 96 is vertical and is biased in the direction of arrow G by the tension coil spring 104, so that the link 96 is moved in the direction opposite to the direction of arrow G by the load from the subframe 20. There is no rotation.

  Further, one end of the wire 110 is locked to the pulley 88 via the metal fitting 112, and the other end of the wire 110 is locked to the middle portion in the longitudinal direction of the link 96. When the pulley 88 rotates in the arrow F direction, the wire 110 is pulled toward the pulley side, and the link 96 is rotated in the direction opposite to the arrow G direction.

  As in the first and second embodiments, the folding seat 10 of the present embodiment configured as described above is configured such that when the seat back 14 is moved forward to change the seat back from the seatable state to the retracted state, the inner cable 60 is The spur gear 86 rotates in the direction of the arrow F and the link 96 rotates in the direction opposite to the direction of the arrow G, and the sector gear 82 is lowered. It goes down from the end side. As a result, the upper surface of the cushion material 22 covering the subframe 20 is also lowered at the front end side of the seat, and the forward-back seat back 14 is folded over the seat cushion.

  When returning the seat arrangement from the boarding / alighting state to the seatable state, the seat back 14 may be raised. Since the sub-frame 20 is urged in the direction in which the front end side is lifted by the compression coil spring 90, when the seat back 14 is raised, the inner cable 60 is pulled out to the lower link side, and the spur gear 86 is moved in the direction of the arrow F. Rotates in the opposite direction, the sector gear 82 moves upward, the front end side of the subframe 20 is lifted, and the link 96 swings in the direction of arrow G so that the roller 100 hits the stopper block 108 and the seat arrangement can be seated. Return to the state.

[Fourth Embodiment]
Hereinafter, according to FIG. 6, the folding sheet | seat 10 which concerns on the 3rd Embodiment of this invention is demonstrated. In addition, the same code | symbol is attached | subjected to the same structure as embodiment mentioned above, and the description is abbreviate | omitted.

  As shown in FIG. 6, in the folding sheet 10 of the present embodiment, a cam 116 having wheels 114 that rotate on the rail is placed on the rail 102. The cam 116 includes a slope 116A that descends toward the front of the seat on the front end side of the seat, and a horizontal apex 116B on the rear end side of the slope 116A.

  One end of a tension coil spring 120 is locked to the cam 116 via a metal fitting 118 on the front end side of the seat, and the other end of the tension coil spring 120 is locked to a front frame portion 18A of the frame body 18. The tension coil spring 120 biases the cam 116 toward the seat front end side.

  A stopper block 122 that comes into contact with the cam 116 is attached to the upper surface of the rail 102 in order to limit the movement of the cam 116 toward the front end of the seat.

A bearing 124 is attached to the sub-frame 20 at an intermediate portion in the front-rear direction of the seat, and a roller 128 is rotatably supported on a shaft 126 attached to the bearing 124.
In FIG. 6, the roller 128 is placed on the top portion 116 </ b> B of the cam 116, and the front end side of the sub-frame 20 is lifted from the rear end side, so that the seat arrangement can be seated.

  An inner cable 60 is engaged with the cam 116 at the end portion on the rear end side of the seat, and the cam 116 is moved in the front-rear direction of the seat by the tension coil spring 120 and the inner cable 60.

  In the folding seat 10 of the present embodiment configured as described above, when the seat back 14 is moved forward in order to change the seatable state from the seatable state to the retracted state, the inner cable 60 is seated back. The cam 116 moves toward the rear end side of the sheet. When the cam 116 moves to the sheet rear end side, the roller 128 on the cam moves down on the inclined surface 116A while rotating on the inclined surface. Accordingly, the sheet front end side of the subframe 20 is lower than the sheet rear end side. Go down. As a result, the upper surface of the cushion material 22 covering the subframe 20 is also lowered at the front end side of the seat, and the forward-back seat back 14 is folded over the seat cushion.

  When returning the seat arrangement from the boarding / alighting state to the seatable state, the seat back 14 may be raised. Since the cam 116 is urged toward the front end of the sheet by the tension coil spring 120, when the seat back 14 is raised, the inner cable 60 is pulled out toward the front end of the sheet, and the cam 116 moves toward the front end of the sheet. 128 reaches the top portion 116B via the slope 116A, the front end side of the subframe 20 is lifted, and the seat arrangement can be seated. In a state where the roller 128 is placed on the top portion 116 </ b> B, the cam 116 is biased by the tension coil spring 120 and abuts against the stopper block 122.

  When the seat arrangement is seatable, the roller 128 is mounted on the horizontal top 116B of the cam 116. Therefore, even if the load from the subframe 20 is transmitted to the cam 116 via the roller 128, the cam 116 moves. The front end side of the subframe 20 does not descend.

(Supplementary explanation of the embodiment)
In the above embodiment, the swing mechanism is configured using links, gears, cams, and the like. However, the present invention is not limited to this, and other swing mechanisms may be used as long as at least the front end side of the subframe 20 can be raised and lowered. it can.

  In the above embodiment, the outer cable 58 and the inner cable 60 are used to operate the swing mechanism. However, the present invention is not limited to this, as long as the swing mechanism can be operated by transmitting the operation of the seat back 14. A known operating force transmission member other than a cable such as a gear mechanism, a link mechanism, or a chain can be used.

  In the above embodiment, the folding seat 10 is attached to the floor 17 of the vehicle body. However, the folding seat 10 may be attached to the side wall of the vehicle compartment, the side part of another vehicle seat, or the like. The structure stored along the side wall of a room or the side part of another vehicle seat may be sufficient.

  In the said embodiment, although the folding sheet | seat 10 was a thing for motor vehicles, this invention is not limited to this, The folding sheet | seat 10 is applicable to all vehicles other than motor vehicles, such as a ship, an aircraft, a railroad.

  In the above-described embodiment, the seat cushion 12 is divided into the front seat cushion portion 12A and the rear seat cushion portion 12B with the shaft 28 disposed at the intermediate portion in the seat front-rear direction of the seat cushion 12 as a boundary. However, the present invention is not limited to this, and the seat cushion 12 includes a front seat cushion portion 12A and a rear seat cushion portion 12B that are integrally formed. The seat cushion 12 may be disposed on the rear end side of the seat cushion so that the entire seat cushion 12 swings about the shaft 28.

  In addition, the present invention can be implemented with various modifications without departing from the scope of the invention. It goes without saying that the scope of rights of the present invention is not limited to the above embodiment.

DESCRIPTION OF SYMBOLS 10 Folding seat 12 Seat cushion 12A Front seat cushion part 12B Rear seat cushion part 14 Seat back 16 Seat cushion frame 28 Axis (hinge)
34 Lower link (first link, swing mechanism)
38 axes (swing mechanism)
40 Upper link (second link, swing mechanism)
42 axis (swing mechanism)
46 Torsion spring (biasing member)
58 Outer cable (cable, operating force transmission member)
60 Inner cable (cable, operating force transmission member)
64 Hardware (operation force transmission member)
66 axis (swing mechanism)
68 Link (swing mechanism)
70 axes (swing mechanism)
72 Roller (swing mechanism)
74 rail (swing mechanism)
76 pins (swing mechanism)
78 Tension coil spring (biasing member)
82 Sector gear (swing mechanism)
84 axis (swing mechanism)
86 Spur gear (swing mechanism)
90 Compression coil spring (biasing member)
114 wheels (swing mechanism)
116 cam (swing mechanism)
118 Hardware (swing mechanism)
120 Tension coil spring (biasing member structure)
124 Bearing (swing mechanism)
126 shaft (swing mechanism)
128 rollers (swing mechanism)
P Crew

Claims (8)

A seat cushion in which a front seat cushion portion and a rear seat cushion portion are connected by a hinge, and an occupant can be seated;
A seat back configured as a backrest of the occupant, and configured to be able to move forward from the standing state toward the seat cushion; and
A seat cushion frame disposed below the seat cushion;
A swing mechanism that connects the front seat cushion portion and the seat cushion frame, and swings the front seat cushion portion in the vertical direction;
Folding sheet having   The folding seat according to claim 1, wherein the hinge is provided at a rear side of a front-rear direction center portion of the front seat cushion portion.   An operation force transmitting member that connects the seat back and the swing mechanism and operates the swing mechanism in accordance with a forward tilting operation of the seat back to move the front end of the front seat cushion portion downward. The folding sheet of Claim 1 or Claim 2.   The folding seat according to claim 3, further comprising a biasing member that biases the swing mechanism to move the front end side of the front seat cushion portion upward.   The folding seat according to claim 1 or 2 which has an energizing member which energizes the front end side of said front side seat cushion part upwards.   The swing mechanism is disposed on the front end side of the seat cushion with respect to the hinge, the first link is connected to the front seat cushion portion side and swings about the one end side, and the one end is on the seat cushion frame side. A second link that is connected and swings about one end side, and the other end is connected to the other end of the first link and swings with respect to the first link. The folding sheet according to any one of claims 1 to 5.   The folding seat according to claim 6, wherein the operation force transmission member is a cable that pulls down the first link and the second link by a forward movement operation of the seat back. A seat cushion on which an occupant can sit,
A seat back configured as a backrest of the occupant, and configured to be able to move forward from the standing state toward the seat cushion; and
A seat cushion frame disposed below the seat cushion;
A hinge provided behind the seat front end side of the seat cushion to enable the seat cushion to swing up and down;
A swing mechanism that connects the seat cushion and the seat cushion frame, and swings the seat cushion in a vertical direction;
Folding sheet having

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