JP2012131289A5 - - Google Patents

Description

Folding seat device for vehicle

  The present invention provides a seat support base mounted on a floor of a vehicle body, a seat cushion, and a seat cushion that is provided between the seat support base and the seat cushion, and is lower than the use position and at a rear storage position. A cushion storage mechanism that can be moved to the seat cushion; a seat back that is supported by the seat support so as to be able to rotate between a standing position that stands above the seat cushion; and a lying position that overlaps the seat cushion; A reclining mechanism provided between the seat support and the seat back and capable of selectively holding the seat back in the standing position and the lying position; and interlocking with the rotation of the seat back from the standing position to the lying position. The reclining mechanism and the crank are moved so that the seat cushion is moved from the use position to the retracted position. The more the interlocking mechanism for connecting the Deployment storage mechanism, an improvement of the folding seat apparatus for a vehicle.

  Such a folding seat device at the rear of the vehicle is already known as disclosed in Patent Document 1 below.

JP-A-7-223474

  In a conventional folding seat device for a vehicle, when the cushion storage mechanism moves the seat cushion from the use position to the storage position, the seat cushion is moved in parallel. By the way, in general, the seat cushion has its upper surface inclined forward and upward in consideration of the stability of the occupant's seat. Therefore, when the seat cushion is translated to the storage position as it is, the seat back is placed on the inclined upper surface. When lying down, there is a useless space between the seat cushion and the seat back, which prevents the seat from being compacted in the folded state.

  The present invention has been made in view of such circumstances, and in the folded state of the seat holding the seat cushion in the retracted position and the seat back in the lying down position, wasteful space is eliminated from between the seat cushion and the seat back. An object of the present invention is to provide a foldable seat for a vehicle that can make the entire seat compact and can effectively use the back of the seat back as a load carrying surface.

  In order to achieve the above object, the present invention provides a seat support base mounted on a floor of a vehicle body, a seat cushion, and a seat cushion provided between the seat support base and the seat cushion. A cushion retracting mechanism that can be moved to a retracted position lower than the position, and a seat retracting position that can be rotated between an upright position that stands above the seat cushion and a lying position that overlaps the seat cushion. A seat back supported between the seat back and the seat back, and a reclining mechanism that can selectively hold the seat back in the standing position and the lying position, and the seat back from the standing position to the lying position. The seat cushion is moved from the use position to the retracted position in conjunction with the rotation of the In a foldable seat device for a vehicle, comprising a lining mechanism and an interlocking mechanism for connecting the cushion storage mechanism, the seat cushion extends along the front, rear, left and right sides of the cushion frame and is connected to the cushion storage mechanism And the seat back includes a back frame that extends along the top, bottom, left and right surfaces and to which the reclining mechanism is connected. The cushion storage mechanism is configured to dispose the cushion frame at a use position of the seat cushion. The cushion frame is held in a forwardly inclined state, and is configured to hold the cushion frame in a substantially horizontal state in the retracted position. The reclining mechanism holds the back frame in a substantially horizontal state in the lying position of the seat back. The first feature is to be configured as described above.

  In addition to the first feature, the present invention provides the left and right sides of the cushion frame and the left and right sides of the back frame in a folded state where the seat cushion is moved to the retracted position and the seat back is moved to the lying position. A second feature is that the cushion frame and the back frame are configured so that both sides overlap each other in plan view.

In addition to the first feature of the present invention, the cushion storage mechanism includes a front end portion of the cushion frame having one end portion connected to the seat support base via a first pivot and the other end portion connected to a second pivot. A front swing arm connected to each of the side surfaces, one end of the front swing arm behind the front swing arm via the third pivot to the seat support and the other end of the cushion frame via the fourth pivot The rear swing arm is connected to the side surface of the rear end portion and has a shorter effective length than the front swing arm, and the front swing arm is rotated from a substantially vertical standing posture to a backward leaning posture. And moving the rear swing arm from the forward projecting position to the hanging position to obtain the seat cushion storage position in which the cushion frame is in a substantially horizontal state. It is a feature of the.

  Furthermore, in addition to the third feature, the present invention provides that the center of the second pivot is offset upward from the central axis of the side portion of the cushion frame at the use position of the seat cushion, The fourth feature is that the center of the fourth pivot is offset downward from the central axis of the side portion of the cushion frame.

  According to the first feature of the present invention, in the folded state of the seat in which the seat cushion is held in the retracted position and the seat back is held in the lying down position, the cushion frame and the back frame are both held in a substantially horizontal state. Both frames will be closest to each other substantially in parallel with each other, so that the entire seat can be folded compactly while eliminating wasted space between the seat cushion and the seat back. In addition, the back of the seat back can be effectively used as a substantially horizontal load carrying surface, improving the loadability of the load.

  According to the second feature of the present invention, in the folded state of the seat, not only the left and right sides of the cushion frame and the both sides of the back frame overlap in a plan view, but the seat can be folded more compactly. , When loading luggage on the back of the seat back, the weight can be firmly supported by both frames.

According to a third aspect of the present invention, than the effective length before BuYurado arm that rotates to collapse position rearward from a substantially vertical standing position, to hanging posture from protruding position forward rotation since the effective length of the BuYurado arm is shorter after the whereas the second pivot moves greatly backward and downward, the amount of downward movement of the fourth pivot, the second pivot than small, the amount of movement of the rearward becomes substantially equal to that of the second pivot, as a result, the cushion frame of the front rising slope in the use position of the seat cushion can be a substantially horizontal state in the storage position.

  According to the fourth aspect of the present invention, the effective length of the front swing arm is increased by the amount that the center of the second pivot is offset upward from the center axis of the side portion of the cushion frame. When the seat cushion moves toward the retracted position, the amount of movement of the second pivot backward and downward increases and the center of the fourth pivot is offset downward from the central axis of the side of the cushion frame. As a result of the above, the rearward movement limit of the fourth pivot shifts to the rear. As a result, when the seat cushion is in the use position, the cushion frame with the front rising slope is in the horizontal position in the retracted position. It can be moved and can contribute to the improvement of the seat cushion retractability.

1 is a perspective view of a foldable seat for an automobile according to an embodiment of the present invention. The perspective view which shows the internal structure of the said foldable sheet | seat. The perspective view which looked at the outer sheet | seat support stand in the said foldable sheet | seat, and its peripheral part from the outer side. The perspective view which looked at the above-mentioned outside sheet support and the front swing arm from the inside. The perspective view which looked at the inner sheet | seat support stand and the front swing arm from the inner side. FIG. 6 is a view taken in the direction of arrow 6 in FIG. 2. FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. FIG. 8 is an enlarged sectional view taken along line 8-8 in FIG. 6. FIG. 9 is an enlarged cross-sectional view taken along line 9-9 in FIG. 6. 10 cross section taken along line - 10 of FIG. Reclining Organization enlarged view of FIG. 6. The unlocking action explanatory drawing of the said reclining mechanism. The side surface which shows the folding state of the said sheet | seat. Figure enlarged view of the reclining Organization in 13. The lower perspective view of the back frame which shows the attachment ring for child seats. The side view which shows another embodiment of this invention in the folded state of a sheet | seat. The perspective view which shows the foldable sheet | seat of another embodiment of this invention. FIG. 10 is a view corresponding to FIG. 9 showing still another embodiment of the present invention.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. In the following description, front and rear and left and right are based on the automobile on which the folding seat of the present invention is installed.

  First, in FIG. 1, FIG. 7 and FIG. 13, the vehicle body is a pair of rear wheels that rise up from the left and right side sills S, S and the outer edges of these side sills S, S and cover left and right rear wheels (not shown). A floor F including upper surfaces thereof is formed between the left and right side sills S, S, and a pair of left and right foldable seats 1 according to the present invention are provided on the floor F. 1 is disposed.

  The floor F is connected to the bases of the rear wheel houses H, H and extends in the front-rear direction. The narrow high surface Fa, Fa, and the wide low surface Fb formed between the high surface Fa, Fa. The low surface Fb is the bottom surface Fb of the recess Fr formed between the high surface Fa. The height surface Fa is inclined to the front end and is continuous with the general surface Fc of the floor F on all seats, and the recess Fr is shallow toward the front, and the bottom surface Fb is also the general surface. It is connected to Fc. Further, a bulging portion P is formed at the front portion of the step portion between the high surface Fa and the low surface Fb, and this bulging portion P is formed by a recess on the outside of the rear suspension mechanism (not shown). The support part is accommodated and held.

  As shown in FIGS. 1 and 2, the pair of left and right foldable sheets 1 and 1 are configured symmetrically. Each seat 1 includes outer and inner seat supports 2, 2 'attached to the high surface Fa and the low surface Fb, a seat cushion 4 disposed above the recess Fr, and the outer and inner seat supports. Cushion storage mechanisms 5, 5 that connect between the seat cushions 4, 2 ′, and a seat back 6 that is supported by the outer and inner seat support bases 2, 2 ′ in the vicinity of the rear end of the seat cushion 4, The reclining mechanism 7 for connecting the outer and inner seat supports 2, 2 'and the seat back 6 and the interlocking mechanism 8 for connecting the reclining mechanism 7 and the cushion storage mechanism 5 are provided.

  As shown in FIGS. 3 to 6, the cushion storage mechanism 5 alternately holds the seat cushion 4 at the use position A (see FIGS. 6 and 7) and the storage position B (see FIGS. 7 and 13). In the use position A, the bottom portion 4a of the seat cushion 4 is located above the high place surface Fa, and in the storage position B, at least the bottom portion 4a is close to the low place surface Fb below the high place surface Fa. Occupy the position.

The reclining mechanism 7 can hold the seat back 6 alternately in a standing position C (see FIGS. 1 and 6) and a lying position D (see FIGS. 1 and 13). In the standing position C, The seat back 6 stands up from the vicinity of the rear end portion of the seat cushion 4 or upwards from the rear side of the seat cushion 4, and the seat back 6 overlaps the upper surface of the seat cushion 4 in the lying position D. The interlocking mechanism 8 moves the seat cushion 4 between the use position A and the storage position B in conjunction with the rotation of the seat back 6 between the standing position C and the lying position D. Details of these will be described later. The state in which the seat back 6 is lowered to the lying position D and the seat cushion 4 is lowered to the storage position B is referred to as a folded state of the seat 1.

As clearly shown in FIG. 2, the left and right inner sheet support bases 2 ′ and 2 ′ are disposed close to each other at the center in the left-right direction of the low surface Fb. As shown in FIGS. 2 to 7, the outer and inner seat support bases 2 and 2 ′ include front support members 10 and 10 ′, rear support members 11 and 11 ′ disposed behind the front support members 10 and 10 ′, And rear support members 10 and 10 '; and connecting members 12 and 12' for connecting between 11 and 11 '. Front support member 10, 10 ', horizontal base wall 10a, 10a' and, the base wall 10a, 'support wall 10b which is erected by bending the inner end of the upward, 10b' 10a has become more and, The base walls 10a and 10a 'are respectively bolted to the corresponding high surface Fa and low surface Fb. The rear support members 11, 11 'are higher than the support walls 10b, 10b' from the horizontal base walls 11a, 11a 'wider than the base walls 10a, 10a' and from one end of the base walls 11a, 11a '. support wall 11b which is erected by bending the 'have become more and, the base wall 11a, 11a' 11b are respectively bolted to the corresponding altitude surface Fa and Teitokoromen Fb. The front and rear support members 10 ′ and 11 ′ of the inner seat support 2 ′ are stepped between the lower surface Fb and the higher surface Fa than the front and rear support members 10 and 11 of the outer seat support 2. Only long in the vertical direction. Accordingly, the seat cushion storage mechanism 5 that connects the outer seat support 2 and the seat cushion 4 and the seat cushion storage mechanism 5 that connects the inner seat support 2 'and the seat cushion 4 have the same dimensions. And can be configured symmetrically.

  The seat cushion 4 has a frame 14 (hereinafter referred to as a cushion frame 14) formed by bending a metal pipe material into a quadrilateral along the front, rear, left and right surfaces, and the front outer surface on both the left and right sides thereof. The front brackets 15 and 15 are welded, and the rear brackets 16 and 16 are welded to the left and right corners on the rear side. The front bracket 15 extends long in the front-rear direction, and an outward bulging portion 15a is formed in the middle in the longitudinal direction. The rear bracket 16 is formed in an L shape with a front half extending in the front-rear direction and welded to the outer surface of the cushion frame 14 and a rear half extending in the left-right direction and welded to the rear side surface of the cushion frame 14. An outward bulging portion 16a is formed at the rear end of the front half. The cushion frame 14 is effectively reinforced by the front and rear brackets 15 and 16.

  The seat back 6 also has a frame 17 (hereinafter referred to as a back frame 17) formed by bending a metal pipe into a quadrilateral along the upper, lower, left and right surfaces, and side brackets 18 at the lower portions of the left and right side surfaces. , 18 are welded.

  When the seat 1 is folded, the cushion frame 14 and the back frame 17 are arranged so that the left and right side portions of the cushion frame 14 and the left and right side portions of the back frame 17 overlap in a plan view. The lateral widths W1 and W2 (see FIG. 7) are set substantially equal to each other.

3 to 10, the seat cushion storage mechanism 5 includes front swing arms 19 and 19 that connect the support walls 10b and 10b 'of the front support members 10 and 10' and the front brackets 15 and 15, respectively. , Rear support members 11, 11 ′ support walls 11 b, 11 b ′ and rear brackets 16, 16 are connected to the rear swing arms 20, 20. Each of the front swing arms 19 has one end portion forward and backward with respect to the front support members 10 and 10 ′ via the fixed pivot 21 and the other end portion with respect to the front bracket 15 via the front movable pivot 22. It is connected so as to be rotatable in the vertical direction. One end of the rear swing arm 20 is connected to the support walls 11b and 11b 'of the rear support members 11 and 11' via the main shaft 23, and the other end is connected to the rear bracket 16 via the rear movable pivot 24. It is connected so that it can rotate in the front-rear and up-down directions. The main shaft 23 is fixed to the support walls 11b and 11b '. In the above, the effective length of each rear swing arm 20, that is, the inter-axis distance between the main shaft 23 and the rear movable pivot 24, is the effective length of each front swing arm 19, that is, between the fixed pivot 21 and the front movable pivot 22. It is set shorter than the distance between the axes.

The fixed pivot 21 that supports the lower end portion of the front swing arm 19 is composed of rivets that are fixed to the support walls 10 b and 10 b ′.

  The front movable pivot 22 that supports the upper end of the front swing arm 19 is a bolt that penetrates the outward bulging portion 15a of the front bracket 15 and has the head 22a fixed to the inner wall thereof by welding or caulking. As a result, the support rigidity of the front movable pivot 22 is reinforced. The upper end of the front swing arm 19 is attached by screwing a nut 26 to the front end of the front movable pivot 22. At that time, the front movable pivot 22 is arranged so that the center thereof is offset by a predetermined distance f1 above the central axis Y of the pipe material constituting the cushion frame 14 (see FIGS. 6 and 8).

  Further, the rear movable pivot 24 that supports the front end portion of the rear swing arm 20 is constituted by a bolt that penetrates the outer bulging portion 16a of the rear bracket 16 and has the head 24a fixed to the inner wall thereof by welding or caulking. As a result, the support rigidity of the rear movable pivot 24 is enhanced. The front end of the rear swing arm 20 is attached by screwing a nut 27 onto the front end of the rear movable pivot 24. At that time, the rear movable pivot 24 is arranged such that the center thereof is offset by a predetermined distance f2 below the center axis of the pipe material constituting the cushion frame 14 (see FIGS. 6 and 10).

  The outwardly bulging portions 15a and 16a of the brackets 15 and 16 not only reinforce the support rigidity of the movable pivots 22 and 24, but also when the front and rear swing arms 19 and 20 rotate, In addition, it also has a function of a distance piece for avoiding interference between the rear swing arms 19 and 20 and the cushion frame 14.

  2 to 6, the use position A of the seat cushion 4 is such that the front swing arm 19 stands in a substantially vertical state above the fixed pivot 21 (in the illustrated example, the fixed pivot 21 And tilting the rear swing arm 20 substantially horizontally to the front of the main shaft 23 so that the bottom 4a of the seat cushion 4 occupies a higher position than the high face Fa. Is done. At this time, the cushion storage mechanism 5 is provided with first movement restricting means 28 for restricting the forward rotation limit of the front swing arm 19.

  Specifically, the first movement restricting means 28 is provided between each seat support 2, 2 ′ and each front swing arm 19, 19. More specifically, the first movement restricting means 28 includes a stopper portion 28 cut and raised on the support walls 10b and 10b 'of the front support members 10 and 10'. The front edge of the moving arm 19 is received and the forward limit of the front swing arm 19 is restricted. In the use position A of the seat cushion 4, the cushion frame 14 is held in a state of being inclined forward and upward. Accordingly, the upper surface of the seat cushion 4 is also inclined forward and upward.

  Further, as shown in FIG. 13, at the storage position B of the seat cushion 4, the front swing arm 19 is pivoted in a substantially horizontal state behind the fixed pivot 21 (in the illustrated example, the front movable pivot 22 side is slightly moved). And the rear swing arm 20 is rotated almost directly below the main shaft 23 (in the illustrated example, below the main shaft 23 and slightly rearward), the bottom 4a of the seat cushion 4 is lowered. It is controlled to occupy a low position close to the surface Fb, that is, to be received in the recess Fr.

  At this time, the second movement restricting means for restricting the lower rotation limit of the front swing arm 19 is between the outer seat support 2 and the corresponding front swing arm 19 and the inner seat support 2 '. And between the corresponding front swing arms 19. Specifically, the second movement restricting means includes a stopper portion 29 (see FIG. 4) bent from the front swing arm 19 and an inward stopper portion 30 formed on the connecting member 12 of the outer sheet support base 2. The stopper 30 and the stopper portion 29 are in contact with each other, thereby restricting the lower limit of rotation of the front swing arm 19, and in the inner seat support 2 ′. The stopper portion 31 (see FIG. 5) cut and raised on the support wall 10b ′ of the front support member 10 ′ is formed. When the lower edge of the front swing arm 19 is in contact with this, the front swing member 19 ′ The lower limit of rotation of the moving arm 19 is restricted. Due to the restriction of the lower rotation limit of the front swing arm 19, the center of the front movable pivot 22 is set so as not to go below the straight line L connecting the centers of the fixed pivot 21 and the rear movable pivot 24. Is done. That is, the center of the front movable pivot 22 is prevented from descending above the straight line L.

  Thus, when the seat cushion 4 is lowered to the storage position B, the cushion storage mechanism 5 is configured to lower the bottom of the seat cushion 4, particularly a part of the cushion frame 14, to a position lower than the height surface Fa. The frame 14 is configured to be held in a substantially horizontal state like the low surface Fb.

  As shown in FIG. 7, the bottom surface of the seat cushion 4 is provided with a relief 4 b that avoids interference with the bulging portion P when it reaches the storage position B.

6, 9, 11, and 12, the reclining mechanism 7 includes a pair of left and right reclining bases 35, 3 fixed to the outer surfaces of the left and right side brackets 18, 18 of the seat back 6 by a plurality of bolts 34. 5 is provided. These reclining bases 35 are superimposed on the inner side surfaces of the support walls 11b and 11b 'of the inner and outer rear support members 11 and 11', and are rotated on the main shaft 23 fixed to the support walls 11b and 11b '. Supported as possible. A stopper pin 36 protruding from the inner surface is fixed to the support wall 11 b of the outer rear support member 11, while the outer reclining base 35 has an arc shape concentric with the main shaft 23 and the stopper pin 36. A long hole 37 that engages with the long hole 37 is provided. When the stopper pin 36 abuts against one inner end wall of the long hole 37, the standing position C (see FIG. 11) of the seat back 6 is regulated, and the stopper pin 36 is The fall position D (see FIG. 14) of the seat back 6 is regulated by contacting the other inner end wall of the long hole 37. At this time, the back frame 17 and the back of the seat back 6 are substantially horizontal. Kept in a state.

  In addition, an auxiliary base 38 disposed so as to sandwich the support wall 11b in cooperation with the outer reclining base 35 is fixed to the outer side surface of the outer reclining base 35. The auxiliary base 38 is also rotatable on the main shaft 23. Supported.

  A fall spring 39 is provided on the auxiliary base 38 and the main shaft 23 so as to urge the seat back 6 in the forward fall direction via the auxiliary base 38. The fall spring 39 is constituted by a spring that is disposed around the main shaft 23, and its inner end is locked to the main shaft 23 and its outer end is locked to a locking claw 40 formed on the auxiliary base 38. .

  The upper outer peripheral surface of the support wall 11b of the outer rear support member 11 is formed into an arc surface centered on the main shaft 23, and a lock groove 33 is formed on the outer peripheral surface thereof. On the other hand, the auxiliary base 38 is fixed to the reclining base 35 by two axes of a main shaft 23 and a support shaft 41 disposed above the main shaft 23 and penetrating the auxiliary base 38. And between the auxiliary bases 38, a lock lever 42 which can be engaged with and disengaged from the lock groove 33 is supported by the support shaft 41 so as to be swingable. When the seat back 6 is raised to the standing position C, the lock lever 42 engages the lock groove 33 to lock the seat back 6 to the standing position C. The lock lever 42 has a release arm 43 that protrudes from the upper surface thereof.

  Further, a lock control lever 44 and a drive lever 45 that are sequentially arranged upward from the lock lever 42 side are rotatably supported on the reclining base 35 via a support shaft 46 and a support shaft 47, respectively.

  The lock control lever 44 includes a presser arm 44a protruding toward the lock lever 42, a release cam 44b facing the release arm 43, and a driven arm 44c protruding toward the drive lever 45. The presser arm 44a is a lock arm. The back surface of the lock lever 42 engaged with the groove 33 can be pressed and held in the engaged state, and the release cam 44b presses and rotates the release arm 43 to move the lock lever 42 from the lock groove 33. Can be withdrawn. A driven pin 48 projects from the side surface of the driven arm 44c.

  The drive lever 45 includes a lower arm 45a projecting downward from the support shaft 47 and an upper arm 45b projecting forward from the support shaft 47. The lower arm 45a has a bent elongated hole shape with which the driven pin 48 engages. Drive groove 49 is provided. When the upper arm 45b rotates downward (see FIG. 11), the drive groove 49 rotates the lock control lever 44 in the locking direction of the lock lever 42 via the driven pin 48, and the upper arm 45b rotates upward. When moving (see FIG. 12), the lock control lever 44 is rotated in the unlocking direction of the lock lever 42 via the driven pin 48, and between the upper arm 45b and the auxiliary base 38, The lock spring 50 that urges the upper arm 45b to rotate downward is contracted. The lock spring 50 is constituted by a coil spring, one end of which is connected to the connection piece 51 of the auxiliary base 38, and the other end is connected to the connection hole 52 of the upper arm 45b. The upper arm 45b is connected to a release operation wire 54 that can rotate the upper arm 45b upward against the urging force of the lock spring 50. The release operation wire 54 is guided by a guide tube 56 supported at the upper end portion of the reclining base 35 via a wire support piece 55 and pulled out to the back side of the seat back 6. A strap 57 (FIG. 6) for operation is attached.

Thus, when the seat back 6 is raised to the use position A, the upper arm 45b of the drive lever 45 is rotated downward by the urging force of the lock spring 50 as shown in FIG. The lock control lever 44 is rotated in the lock direction of the lock lever 42 via the pin 48. In other words, the presser arm 44a of the lock control lever 44 presses the back surface of the lock lever 42 to hold the lock lever 42 in an engaged state with the lock groove 33 of the rear support member 11, whereby the seat back 6 is used. Locked to position A. As shown in FIG. 12, when the release operation wire 54 is pulled by the strap 57, the upper arm 45 b of the drive lever 45 rotates upward against the urging force of the lock spring 50, and the driven pin 48 is moved by the drive groove 49. Then, the lock control lever 44 is rotated in the release direction. That is, the lock lever 42 releases the presser arm 44 a from the back surface of the lock lever 42 to the rear, and the release cam 44 b presses the release arm 43 of the lock lever 42 to release the lock lever 42 from the lock groove 33. As a result, the seat back 6 rotates forward by the urging force of the fall spring 39 and reaches the fall position D that overlaps the upper surface of the seat cushion 4. The lodging position D, as described above, the stopper pin 36 of the rear support member 11 is RiTadashi braking by the coming into contact with the front inner end wall of the elongated hole 37 of the reclining base 35, the back frame 17 and the seat back 6 The back surface of the is substantially horizontal.

When returning the seat back 6 from the lying position D to the standing position C, the seat back 6 is raised against the urging force of the lying spring 39. If the traction of the release operation wire 54 is released during this time, the lock lever 42 is engaged with the lock groove 33 by the action of the urging force of the lock spring 50 and the seat back 6 is automatically held in the standing position C. Can do. The standing position C, as described above, the stopper pin 36 of the rear support member 11 is RiTadashi braking by the coming into contact with the inner rear end wall of the long hole 37 of the reclining base 35.

3 and 9, the rear swing arms 20 and 20 on both the inner and outer sides are arranged with a predetermined distance e offset from the support walls 11b and 11b 'of the rear support members 11 and 11' on both sides inwardly. . The interlocking mechanism 8 is integrally connected between each rear swing arm 20 and each reclining base 35 superimposed on the inner surface of the support walls 11b and 11b ′. At this time, the predetermined distance e is set to be larger than the protruding amount from the outer surface of the rear swing arm 20 of the rear movable pivot 24.

  Specifically, the interlocking mechanism 8 is composed of a spacer piece 58 that is bent inwardly from each reclining base 35 and extends the predetermined distance e, and the rear swing arm 20 extends from the inner end of the spacer piece 58. It is formed by bending. The reclining base 35, the spacer piece 58, and the rear swing arm 20 are press-molded from a single plate material. The reclining base 35, the spacer piece 58, and the rear swing arm 20 can be manufactured by dividing them and then joined together by welding or the like. In any case, the main shaft 23 is a pivot common to the reclining base 35 and the rear swing arm 20.

  Thus, when the reclining base 35 stands up together with the seat back 6, the interlocking mechanism 8 projects the rear swing arm 20 forward of the main shaft 23 in conjunction with the reclining base 35, and the reclining base 35 moves forward together with the seat back 6. When lying down, the rear swing arm 20 is operated so as to rotate downward of the main shaft 23 in conjunction with it.

  In the above description, the brackets 15 and 16 welded to the cushion frame 14 are integrated with the cushion frame 14 so that the brackets 15 and 16 are substantially part of the cushion frame 14 and welded to the back frame 17. Is integrated with the back frame 17 to substantially become a part of the cushion frame 14.

  The operation of the foldable sheet 1 will be described.

  As shown in FIG. 11, when the seat back 6 is locked to the standing position C by the reclining mechanism 7, in the seat cushion storage mechanism 5, the rear swing arm 20 connected to the reclining base 35 projects to the front of the main shaft 23. As shown in FIG. 6, the seat cushion 4 is positioned above the high surface Fa of the floor F, and the upper surface of the floor cushion F as shown in FIG. It can be held at the use position A with the front rising slope. Therefore, an occupant can sit on the seat 1 stably as usual.

  In such a use position A of the seat cushion 4, the front swing arm 19 of the cushion storage mechanism 5 comes into contact with the first movement restricting means 28, that is, the stopper portion 28 of the front support members 10 and 10 '. Since the forward rotation limit is restricted, when a large forward load is applied to the seat 1 in use, the load is applied to the first reclining mechanism 7 in the locked state and the first in the cushion storage mechanism 5. It is distributed and supported by the movement restricting means 28. Therefore, the load of the reclining mechanism 7 can be reduced and the seat 1 can be firmly held in use while avoiding an increase in size.

  Next, when the reclining mechanism 7 is unlocked and the seat back 6 is lowered forward toward the fall position D by the biasing force of the fall spring 39 (see FIG. 14), the reclining base 35 also falls forward. In conjunction with this, the rear swing arm 20 of the seat cushion storage mechanism 5 is rotated downward to the main shaft 23, and the rear end of the cushion frame 14 is pulled downward and rearward via the rear movable pivot 24. Along with this, the front swing arm 19 rotates backward from the substantially vertical standing posture around the fixed pivot 21, and as a result, as shown in FIG. That is, it moves toward the storage position B, and in the storage position B, the front swing arm 19 is provided with stoppers 30 on the inner and outer sheet support bases 2, 2 ', It is regulated by abutting the 1.

  By the way, the effective length of the rear swing arm 20 that rotates from the substantially vertical standing posture to the backward tilted posture is the effective length of the front swing arm 19 that rotates from the forward projecting posture to the hanging posture. Since the front movable pivot 22 moves greatly rearward and downward because it is shorter, the downward movement amount of the rear movable pivot 24 is smaller than that of the front movable pivot 22 and moves backward. The amount of movement is substantially equal to that of the front movable pivot 22. As a result, the cushion frame 14 that is inclined forward and upward at the use position A of the seat cushion 4 is substantially horizontal at the storage position B.

  Moreover, at the use position A of the seat cushion 4, the center of the front movable pivot 22 occupies a position offset by a fixed distance f1 above the central axis Y of the side portion of the cushion frame 14, while the center of the rear movable pivot 24 is the cushion. Since it occupies a position offset by a certain distance f2 from the center axis Y of the side portion of the frame 14, the front swing is equivalent to the offset of the center of the front movable pivot 22 from the center axis Y of the side portion of the cushion frame 14. When the seat cushion 4 moves toward the retracted position B by the amount that the effective length of the movable arm 19 is increased and the center of the rear movable pivot 24 is offset downward from the central axis Y of the side of the cushion frame 14, the rear movable pivot 24 The rearward movement limit of the seat cushion 4 shifts to the rear, and the storage position B of the seat cushion 4 is further lowered. And it can be shifted to the rear.

  As described above, the seat cushion 4 has its bottom 4a stored in the recess Fr of the floor F. In other words, the seat cushion 4 has its bottom 4a held at a position close to the low surface Fb that is lower than the high surface Fa of the floor F, and the retractability of the seat cushion 4 is improved.

On the other hand, the seat back 6 reaches the fall position D at the same time when the seat cushion 4 reaches the retracted position B. In the fall position D, the stopper pin 36 of the rear support member 11 is inserted into the long hole 37 of the reclining base 35. by the coming into contact with the front inner end wall is RiTadashi braking.

  By the way, the seat back 6 in the lying position D overlaps with the seat cushion 4 in the storage position B while keeping the back frame 17 substantially horizontal, and the seat cushion 4 makes the cushion frame 14 substantially horizontal as described above. Therefore, both the frames 14 and 17 are closest to each other substantially parallel to each other, so that the entire seat 1 can be folded in a compact manner while eliminating useless space between the seat cushion 4 and the seat back 6. Moreover, the back surface of the seat back 6 can be effectively used as a substantially horizontal load carrying surface, and the loadability of the load is improved.

  Further, since the lateral widths W1 and W2 of the cushion frame 14 and the back frame 17 are set to be substantially equal to each other, when the seat 1 is folded, the left and right sides of the cushion frame 14 and the both sides of the back frame 17 are viewed in plan view. In addition to being able to fold the seat 1 more compactly, the weight can be firmly supported by both the frames 14 and 17 when the luggage is loaded on the back of the seat back 6.

  Further, in such a folded state of the seat 1, the seat cushion 4 is held at a position where the bottom portion 4a is lowered from the height surface Fa of the floor F, and the seat back 6 lying down is placed on the seat cushion 4. Therefore, even when a load is placed on the back of the seat back 6, the center of gravity of the entire seat 1 including the load can be lowered from the conventional one, contributing to a lower center of gravity of the vehicle. This can also contribute to an increase in the loading capacity.

  In this case, the seat cushion 4 is configured so that at least a part of the cushion frame 14 of the heaviest material is positioned lower than the height surface Fa in the seat cushion 4 in order to lower the center of gravity of the vehicle. More effective.

  Further, the folded seat 1 is moved rearward from the position before the folding by the action of the cushion storing mechanism 5, and in this state, the seat 1 is arranged within the width in the front-rear direction of the rear wheel house H. Therefore, when the seat 1 is folded, the space on the floor F before and after the rear wheel house H can be used effectively.

  Further, since the reclining mechanism 7 is provided on the outer surface of the seat back 6 facing the rear wheel house H, the reclining mechanism 7 can be installed by effectively using the dead space between the seat back 6 and the rear wheel house H. To.

  At the storage position B of the seat cushion 4, the stopper portion 29 of the front swing arm 19 comes into contact with the inward stopper 30 of the connecting member 12 of the outer seat support 2 by the action of the second movement restricting means, When the lower edge of the front swing arm 19 abuts against the stopper 31 of the front support member 10 ′ of the inner seat support 2 ′, the center of the front movable pivot 22 is fixed to the fixed pivot 21 and the rear movable. Since it is positioned above the straight line L so that it does not exceed the straight line L connecting the centers of the pivots 24, when the seat back 6 is rotated from the lying position D toward the standing position C, the rear part of the cushion storage mechanism 5 The seat cushion 4 that moves forward as the swing arm 20 pivots forward from the downward position reliably secures the front swing arm 19 via the front movable pivot 22. And pushed forward, it is possible to return the seat cushion 4 in the use position A.

  On the other hand, when the seat back 6 reaches the predetermined standing position C, the lock lever 42 engages with the lock groove 33 of the rear support member 11 by the action of the lock spring 50 of the reclining mechanism 7, and the seat back 6 is raised. The position C is held.

The rear swing arm 20 is disposed at a predetermined distance e offset from the inner surface of the support wall 11 b of the rear support member 11 that supports the rear movable pivot 24 toward the inside thereof. The predetermined distance e is the rear portion of the rear movable pivot 24. The interlocking mechanism 8 is integrally connected between the rear swing arm 20 and the reclining base 35 so as to be larger than the protruding amount from the outer surface of the swing arm 20, so that the interlock mechanism 8 is connected to the rear swing arm 20 and the reclining base. Of course, when the rear swing arm 20 of the cushion storage mechanism 5 is rotated downward to operate the seat cushion 4 to the storage position B, the rear swing arm 20 of course serves as a spacer between the bases 35. , A rear movable pivot 24 projecting from the outer surface thereof, a nut 27 and the like screwed thereto, and a support wall 11b of the rear support members 11, 11 ′, You can avoid rubbing and interference with the 1 b ', thus the sheet 1 can be folded smoothly, of course, can be performed smoothly return to use.

  The interlock mechanism 8 includes a spacer piece 58 bent inward from the reclining base 35, and the rear swing arm 20 is bent from the inner end of the spacer piece 58. The spacer piece 58 and the rear swing arm 20 are press-molded from a single plate material, which is effective in reducing the number of parts, simplifying the structure, and making the structure compact.

  1, 2, and 13 again, a pair of left and right headrest guide tubes 60, 60 extending in the vertical direction are fixed to the upper portion of the back frame 17, and the left and right headrest 61 are fixed to the headrest guide tubes 60, 60. A pair of support rods 61a and 61a are inserted so that the vertical position is adjustable and detachable. The headrest 61 is formed in a teardrop type that is bent along the front surface from the upper end surface of the seat back 6 and has a rear surface retracted from the back surface of the seat back 6 and is folded when the seat 1 is folded, that is, the seat back. In the lying position D of 6, it is arranged so as to come in front of the seat cushion 4. Therefore, the lower surface of the headrest 61 is positioned below the upper surface of the seat cushion 4, so that interference with the seat cushion 4 of the headrest 61 can be prevented and the center of gravity of the entire seat 1 can be lowered. In particular, since the headrest 61 can be adjusted in the vertical position with respect to the seat back 6, even when the height of the seat back 6 is shorter than the longitudinal length of the seat cushion 4, the position of the headrest 61 is adjusted to move upward. If this is done, when the seat back 6 is lying down, the headrest 61 can be disposed in front of the seat cushion 4 to avoid interference with the seat cushion 4.

  Further, the bulging amount S2 of the headrest 61 from the front surface of the seat back 6 is set smaller than the thickness S1 of the front end portion of the seat cushion 4. Therefore, when the seat 1 is folded, even if the bottom 4a of the seat cushion 4 sinks into the recess Fr of the floor F, the headrest 61 can be prevented from interfering with the general surface Fc of the floor F in front of the recess Fr.

  On the other hand, a notch portion 62 that receives the upper end portion of the headrest 61 adjusted to the lowest adjustment position is formed at the upper end portion of the seat back 6. Accordingly, since the upper surface of the headrest 61 is flush with the upper surface of the seatback 6 at the lowest position of the headrest 61, when the seatback 6 falls down, interference between the headrest 61 and other objects at the front position is avoided. be able to.

  2 and 15, a bracket 65 welded with a child seat mounting ring 64 is welded to the square portion of the back frame 17 so as to reinforce the corresponding corner portion. By doing so, the support rigidity of the attachment ring 64 for the child seat can be increased.

  FIG. 16 shows another embodiment of the present invention. In this embodiment, the seat cushion 4 and the headrest 61 are brought into contact with each other in the front-rear direction by adjusting the position of the headrest 61 that can be adjusted in the vertical position when the seatback 6 is lying down. Yes. Therefore, when the seat 1 is folded, the headrest 61 is brought closest to the front end of the seat cushion 4, and interference between the headrest 61 and a front seat (not shown) can be easily avoided. Since the other configuration is the same as that of the above-described embodiment, the same reference numerals are given to the portions corresponding to those of the above-described embodiment in FIG.

  FIG. 17 shows still another embodiment of the present invention. In this embodiment, the front end of the seat cushion 4 is provided with a notch-shaped recess 63 that can accommodate the headrest 61 when the seat back 6 is lying down. According to such a configuration, even when the seat back 6 cannot be sufficiently secured and the headrest 61 is adjusted to a high position, the headrest 61 interferes with the seat cushion 4 when the seatback 6 falls down. It is possible to fit in the recess 63 without causing interference between the headrest 61 and the front seat.

Moreover headrest 61, since it is detachable relative to the seat back 6, if disconnect it from the seat back 6, even when the spacing between the seat cushion 4 and the front sheet is narrow, removing the headrest 61 Thus, interference of the headrest 61 with the seat cushion 4 can be avoided. Further, in the folded state of the seat 1 from which the headrest 61 is removed, the seat 1 can be easily disposed within the width in the front-rear direction of the rear wheel house H. Can be used. Since the other configuration is the same as that of the above-described embodiment, the same reference numerals are given to the portions corresponding to those of the above-described embodiment in FIG.

  FIG. 18 shows still another embodiment of the present invention. In this embodiment, the interlocking mechanism 8 is composed of a spacer collar 58 ′ that is rotatably fitted to and supported by the main shaft 23, and the reclining base 35 and the rear swing arm 20 are welded to both ends of the spacer collar 58 ′. The Since the other configuration is the same as that of the above-described embodiment, the same reference numerals are given to the portions corresponding to those of the above-described embodiment in FIG.

Thus, the spacer collar 58 ′ disposes the rear swing arm 20 at a predetermined distance e from the inner side surface of the support wall 11 b of the rear support member 11 toward the inside thereof, and is integrally connected to the reclining base 35. will be, as in the above embodiment, the rear swing arm 20, to prevent the like rear movable pivot 24 and the nut 27, the rubbing and interference with the 'support wall 11b of, 11 b' rear support members 11 and 11 Can do.

  The present invention is not limited to the above embodiment, and various design changes can be made without departing from the scope of the invention. For example, the seat cushions 4, 4 of the left and right seats 1, 1 may be integrated and supported by a pair of seat support bases 2, 2 attached to the left and right height surfaces Fa, Fa. In the illustrated example, the pipe materials constituting the cushion frame 14 and the back frame 17 have the same diameter, but they may have different diameters.

A ··· Seat cushion use position B · · · Seat cushion storage position · · · Seat back standing position D · · · Seat back lying position F · · ·・ ・ ・ ・ ・ Floor Y ・ ・ ・ ・ ・ ・ Cushion frame center axis 1 ・ ・ ・ ・ ・ ・ Seat 2 ・ ・ ・ ・ ・ ・ ・ ・ Seat support (outer seat support)
4 .... Seat cushion 5 ... Cushion storage mechanism 6 ... Seat back 7 ... Reclining mechanism 8 ... Interlock mechanism 14 ... · · · Cushion frame 17 · · · Back frame 19 · · · Front swing arm 20 · · · Rear swing arm 21 · · · First pivot (fixed pivot)
22 ... 2nd pivot (front movable pivot)
23 ...... Third pivot (spindle)
24 ... 4th pivot (rear movable pivot)

Claims (4)

A seat support (2) mounted on the floor (F) of the vehicle body, a seat cushion (4), and provided between the seat support (2) and the seat cushion (4), the seat cushion (4) A cushion storage mechanism (5) that can be moved from the use position (A) to a lower storage position (B) that is lower than the use position (A), and a standing position that stands above the seat cushion (4) ( C) and a seat back (6) supported by the seat support (2) so as to be able to rotate between the lying position (D) overlapping the seat cushion (4), and the seat support (2 ) And the seat back (6), and a reclining mechanism (7) capable of selectively holding the seat back (6) in the standing position (C) and the lying position (D), and the seat back (6) ) Standing position (C) and the reclining mechanism (7) and the above-mentioned reciprocating mechanism (7) so as to move the seat cushion (4) from the use position (A) to the storage position (B) in conjunction with the rotation from the lying position (D). In a folding seat device for a vehicle, comprising an interlocking mechanism (8) for connecting the cushion storage mechanism (5),
The seat cushion (4) has a cushion frame (14) that extends along the front, rear, left and right surfaces to which the cushion storage mechanism (5) is connected, and the seat back (6) has upper, lower, left, and right sides. A back frame (17) extending along a surface and connected to the reclining mechanism (7); and the cushion storage mechanism (5) is configured to move the cushion in the use position (A) of the seat cushion (4). The frame (14) is held in a forward-upward inclined state, and the cushion frame (14) is held in a substantially horizontal state in the retracted position (B). The reclining mechanism (7) 6) In the folding position (D) of 6), the vehicle is folded, wherein the back frame (17) is configured to be held in a substantially horizontal state. Seat device. The foldable seat device for a vehicle according to claim 1,
In the folded state of the seat (1) in which the seat cushion (4) is moved to the retracted position (B) and the seat back (6) is moved to the lying position (D), the left and right sides of the cushion frame (14) The folding seat device for a vehicle, wherein the cushion frame (14) and the back frame (17) are configured such that the left and right side portions of the back frame (17) overlap each other in plan view. The foldable seat device for a vehicle according to claim 1,
The cushion storage mechanism (5) has one end portion connected to the seat support (2) via a first pivot (21) and the other end portion connected to the cushion frame (14) via a second pivot (22). A front swing arm (19) connected to the side surface of the front end, and one end of the front swing arm (19) at the back of the front swing arm (19) via the third pivot (23) to the seat support (2). The rear swing arm having a shorter effective length than the front swing arm (19), the other end of which is connected to the rear end side surface of the cushion frame (14) via a fourth pivot (24). 20), and the front swing arm (19) is rotated from the substantially vertical standing posture to the backward tilting posture, and the rear swing arm (20) is changed from the forward projecting posture to the hanging posture. By rotating the cushion cushion Characterized in that the over arm (14) to substantially obtain a storage position of the seat cushion in a horizontal state (4) (B), the folding seat apparatus for a vehicle. The folding seat device for a vehicle according to claim 3,
In the use position (A) of the seat cushion (4), the center of the second pivot (22) is arranged with an offset (f1) upward from the central axis (Y) of the side portion of the cushion frame (14). On the other hand, the center of the fourth pivot (24) is arranged to be offset (f2) downward from the central axis (Y) of the side portion of the cushion frame (14). Sheet device.

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