JP2009023414A - Seat cushion support device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify a structure and to improve production efficiency of a seat cushion support device that rotatably supports a seat cushion between a seated state and a jumped-up state. <P>SOLUTION: The seat cushion support device has: a pair of links provided separated in the horizontal width direction of a seat and capable of rotating by synchronizing with respect to the floor; a rotating shaft member that connects the tip ends of the pair of links and having a pair of laterally projecting parts projecting to the side from each of the links; a bracket rotatably supported with respect to one laterally projecting part of the rotational shaft member; and a support member fixed with the bracket, rotatably supported with respect to the other laterally projecting part of the rotational shaft member, and having a support member for supporting the seat cushion. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a seat cushion support device that rotatably supports a seat cushion between a sitting state and a flip-up state.

2. Description of the Related Art A seat of a type in which a seat cushion can be flipped forward from a seated state is used in a rear seat of an automobile or the like in order to secure a luggage loading space. In this type of seat cushion support device, a structure is known in which a bracket is pivotally attached to a front end portion of a link rotatable with respect to a vehicle floor via a hinge pin, and a plate below the seat cushion is supported by this bracket. It has been. A pair of links and brackets are provided apart from each other in the width direction of the seat, and left and right hinge pins are connected via a connector pipe to rotate the pair of left and right links in synchronization.
JP 2005-313866 A

  In the conventional seat cushion support device, a pair of left and right links are provided with hinge pins to support the pair of left and right brackets, and the seat cushion support member is attached to the pair of left and right brackets, so the number of parts is large. Was complicated.

  Further, since both ends of the connector pipe are closed by hinge pins, there is a problem that the cleaning water and the coating liquid that have entered the connector pipe are difficult to escape in the painting process. For example, the coating liquid that enters the connector pipe during painting does not immediately come off, and if the coating liquid in the connector pipe gradually leaks out during the drying process after painting, the appearance deteriorates. End up.

  Therefore, an object of the present invention is to provide a seat cushion support device that has a simple structure and can be manufactured at low cost. It is another object of the present invention to provide a seat cushion support device that is less liable to retain liquid inside a rotary shaft member that connects the tip ends of a pair of links, and that is excellent in appearance and production efficiency.

  The present invention is provided between the seat cushion and the floor of the seat, in a seat cushion support device that rotatably supports the seat cushion between the seated state and the flip-up state, and is provided separately in the lateral width direction of the seat, A pair of links that can be rotated synchronously with respect to a vehicle floor, and a pivot shaft member that has a pair of side projections that connect the tip ends of the links and project sideways from the links. And a bracket supported rotatably with respect to one side protruding portion of the rotating shaft member, and fixed to the bracket and rotated with respect to the other side protruding portion of the rotating shaft member. And a support member that is movably supported and supports the seat cushion.

  The support member that supports the seat cushion includes a support plate portion that is substantially parallel to the extending direction of the rotation shaft member, and a bent portion in which one end portion of the support plate portion is bent in a direction perpendicular to the axis of the rotation shaft member. The bracket is fixed to the support plate portion of the support member, and the bent portion is configured to have a rotation support hole that allows the side protrusion of the rotation shaft member to be inserted in a relatively rotatable manner. Good.

  The pivot shaft member is fixed to one tip portion of the pair of links, and connects the hinge pin and the other link with the hinge pin having the one side protruding portion that rotatably supports the bracket, A hollow cylindrical connector pipe having the other side protruding portion that rotatably supports the seat cushion support member is preferable.

  1 and 2 show a seat cushion support device for a rear seat of an automobile to which the present invention is applied. This seat cushion support device has a pair of left and right standing wall portions formed on a base member 10 fixed to a vehicle floor, and lower end portions of inner links 13 and outer links 14 via link support shafts 11 and 12, respectively. Is rotatably supported. The inner link 13 and the outer link 14 are separated from each other in the lateral width direction of the seat. The outer link 14 is biased by a link biasing spring 24 provided around the link support shaft 12 of the outer link 14 in the direction indicated by the arrow F1 (the flip-up direction) in FIGS. Has been. The inner link 13 is integrated with the outer link 14 via a hinge pin 15 and a connector pipe 17 which will be described later, and is also urged to rotate in the F1 direction by the link urging spring 24.

  As shown in FIG. 3, a circular through hole 13a is formed near the upper end portion of the inner link 13, and a hinge pin 15 is inserted into the circular through hole 13a. The hinge pin 15 is inserted into the circular through hole 13a and protrudes to the side of the inner link 13, and the inner pin 13 is opposed to the outer link 14 and has a larger diameter than the side protrusion 15a. And a small-diameter insertion portion 15c protruding from the large-diameter flange portion 15b in the opposite direction to the side protrusion 15a. The hinge pin 15 is fixed to the inner link 13 by welding at the welded portion W1 with the large-diameter flange portion 15b applied to the inner surface of the inner link 13.

  The lateral protrusion 15a of the hinge pin 15 has a cylindrical outer peripheral surface protruding laterally from the circular through hole 13a, and the shaft hole 16a of the bracket 16 rotates on the outer peripheral surface of the lateral protrusion 15a. It is supported freely. The bracket 16 includes a side surface portion 16b that has a shaft hole 16a and extends along the outer surface of the inner link 13, and a support surface portion 16c that is substantially orthogonal to the side surface portion 16b. A screw insertion hole 16d is formed in the support surface portion 16c. The bracket 16 is urged to rotate in a direction (sitting position direction) indicated by an arrow F2 in FIGS. 1, 4 to 6 by a bracket urging spring 25 provided around the side protrusion 15 a of the hinge pin 15. ing.

  The small-diameter insertion portion 15c of the hinge pin 15 is inserted into one end portion of the hollow cylindrical connector pipe 17, and the hinge pin 15 and the connector pipe 17 are fixed and integrated by a welded portion W2. The other end of the connector pipe 17 is inserted into a circular through hole 14 a formed in the outer link 14, and serves as a side protrusion 17 a of a cylindrical outer peripheral surface protruding to the side of the outer link 14. The end of the side protrusion 17a is open, and the internal space of the connector pipe 17 communicates with the outside through this open end.

  The connector pipe 17 is fixed to the outer link 14 at the welded portion W3. As described above, since the connector pipe 17 and the hinge pin 15 are fixed by the welded portion W2 and the hinge pin 15 is fixed to the inner link 13 by the welded portion W1, the inner link 13 and the outer link 14 are connected to the hinge pin 15 and the connector pipe 17. Are connected to each other via the link support shafts 11 and 12 and rotated in synchronization with each other.

  A seat support plate (a support member for the seat cushion) 20 includes a support plate portion 20a that is long in the width direction of the seat, and a bent surface portion (folded portion) formed by bending one end of the support plate portion 20a substantially at a right angle. L-shaped plate having 20b. The support plate portion 20a is supported on the support surface portion 16c of the bracket 16, and a screw hole 20c is formed in the support plate portion 20a at a position corresponding to the screw insertion hole 16d of the bracket 16. A support screw 20a is fixed to the bracket 16 by inserting a fixing screw (not shown) into the screw insertion hole 16d and screwing it into the screw hole 20c. A circular rotation support hole 20d is formed through the folded curved surface portion 20b. A side projecting portion 17a of the cylindrical connector pipe 17 is inserted into the rotation support hole 20d to support the rotation. The hole 20d is supported so as to be rotatable relative to the outer peripheral surface of the side protrusion 17a.

  When the seat support plate 20 is attached to the link mechanism having the inner link 13 and the outer link 14, the side protrusion 17a of the connector pipe 17 is first inserted into the rotation support hole 20d, and the folded curved surface portion 20b. Is supported along the outer surface of the outer link 14. And the support plate part 20a is fixed on the support surface part 16c of the bracket 16 using the fixing screw mentioned above. In this fixed state, the bracket 16 that supports the vicinity of one end of the seat support plate 20 is supported so as to be rotatable about the side protrusion 15 a of the hinge pin 15, and is provided at the other end of the seat support plate 20. The folded curved surface portion 20b is supported so as to be rotatable about the side protruding portion 17a of the connector pipe 17 coaxially integrated with the hinge pin 15. At this time, since the movement of the seat support plate 20 in the lateral width direction of the seat is restricted by the fixing screw, the rotation support hole 20d does not fall off from the side protrusion 17a. That is, the rotating shaft member composed of the hinge pin 15 and the connector pipe 17 has a side protrusion 15 a protruding to the side of the inner link 13 and a side protrusion 17 a protruding to the side of the outer link 14. The seat support plate 20 (support plate 20a) is rotatably supported via the bracket 16 with respect to the one side protrusion 15a, and is separately provided with respect to the other side protrusion 17a. The seat portion support plate 20 (folded curved surface portion 20b) is supported so as to be directly rotatable without using a member.

  As shown in FIGS. 4 to 6, the seat support plate 20 is fixed to the lower frame of the seat cushion 22 of the rear seat 21. In the normal seating state, as shown in FIG. 4, the seat cushion 22 is held in a substantially horizontal direction via the above seat cushion support device, and the rear end portion of the seat cushion 22 is the seat back 23. Is engaged with the bottom of the. Here, when an operating means (not shown) is operated to perform the storing operation of the rear seat 21, the inner link 13 and the outer link 14 are allowed to rotate, and the inner link 13 and the outer link are biased by the biasing force of the link biasing spring 24. 14 tries to rotate in the flip-up direction (F1 direction) around the link support shafts 11 and 12. At this time, as shown in FIG. 5, due to the biasing force of the bracket biasing spring 25, the bracket 16 and the seat support plate 20 are rotated in the F2 direction around the hinge pin 15 and the connector pipe 17. The rear part of the seat cushion 22 supported on the upper side is lowered. As a result, the rear end portion of the seat cushion 22 is separated from the lower portion of the seat back 23, and the rotation of the seat cushion 22 in the flip-up direction is not restricted by the lower portion of the seat back 23. Then, as shown in FIG. 6, the inner link 13 and the outer link 14 are rotated in the flip-up direction with the link support shafts 11 and 12 as the rotation centers, and the seat cushion 22 is in a state of being directed in a substantially vertical direction. Subsequently, as shown in FIG. 6, the seat back 23 of the rear seat 21 is tilted forward toward the space occupied by the seat cushion 22 in the normal seating state. As a result, the rear seat 21 is stored, and a wide storage space is obtained.

  As described above, in the seat cushion support device of the present embodiment, the seat support plate with respect to the connector pipe 17 (side projection 17a) is not provided at one end of the seat support plate 20 without an intermediate member such as a bracket. Since 20 (rotation support hole 20d) is configured to be directly pivotably supported, the number of parts is small and the structure can be simplified.

  In the seat cushion support device of this embodiment, painting is performed in a state where the inner link 13, the outer link 14, the hinge pin 15, and the connector pipe 17 are integrated. In the painting process, a process of degreasing, washing with water, and then immersing in a coating liquid (paint tank) is performed, and the cleaning water and the coating liquid enter the connector pipe 17. Here, since the hinge pin is not inserted into the side protrusion 17a side of the connector pipe 17 and the end is opened, the liquid that has entered the connector pipe 17 in the painting process is easily discharged to the outside. ing. Therefore, painting can be performed efficiently and problems such as dripping of the coating liquid can be prevented.

  Although the present invention has been described based on the illustrated embodiment, the present invention is not limited to the illustrated embodiment, and can be improved or modified without departing from the gist of the invention. For example, in the embodiment, the rotation shaft member of the seat support plate 20 is composed of the hinge pin 15 and the connector pipe 17, but the portion corresponding to the hinge pin 15 and the portion corresponding to the connector pipe 17 are integrated in advance. It is also possible to use a moving shaft member.

It is a perspective view showing a seat cushion support device to which the present invention is applied. It is the figure which looked at the seat cushion support device of Drawing 1 from the upper part. It is sectional drawing which shows the rotation support mechanism part of the seat part support plate with respect to the inner link and outer link in the seat cushion support apparatus of FIG.1 and FIG.2. It is a side view of the normal seating state of a rear seat provided with the seat cushion support device of Drawing 1 and Drawing 2. It is a side view which shows the state which the rear part of the seat cushion fell by the rotation of a bracket and a seat part support plate in the transition to the accommodation state of the rear seat. It is a side view of the storage state of the rear seat.

Explanation of symbols

10 Base member 11 12 Link support shaft 13 Inner link 13a Circular through hole 14 Outer link 14a Circular through hole 15 Hinge pin (rotating shaft member)
15a Side protrusion 15b Large diameter flange portion 15c Small diameter insertion portion 16 Bracket 16a Shaft hole 16b Side surface portion 16c Support surface portion 16d Screw insertion hole 17 Connector pipe (rotating shaft member)
17a Side protrusion 20 Seat support plate (support member for seat cushion)
20a Support plate part 20b Folding curved surface part (bending part)
20c Screw hole 20d Rotation support hole

Claims (3)

In the seat cushion support device that is provided between the seat cushion and the floor of the seat and rotatably supports the seat cushion between the sitting state and the flip-up state,
A pair of links that are spaced apart in the width direction of the seat and that can rotate synchronously with respect to the floor;
A rotating shaft member having a pair of side protrusions connecting the tip ends of the pair of links and protruding sideways from the respective links;
A bracket supported so as to be rotatable with respect to one side protrusion of the rotating shaft member;
A support member for supporting the seat cushion, which is fixed to the bracket and is rotatably supported with respect to the other side protruding portion of the rotation shaft member;
A seat cushion support device comprising: 2. The seat cushion support device according to claim 1, wherein the support member includes a support plate portion substantially parallel to an extending direction of the rotation shaft member, and one end portion of the support plate portion orthogonal to the axis of the rotation shaft member. A bent portion bent in the direction of
The bracket is fixed to the support plate portion of the support member, and the seat cushion support device has a rotation support hole through which the side protruding portion of the rotation shaft member is inserted into the bent portion so as to be relatively rotatable. . The seat cushion support device according to claim 1 or 2, wherein the rotation shaft member is
A hinge pin that is fixed to one tip of the pair of links and has one side protrusion that rotatably supports the bracket;
A seat cushion support device comprising a hollow cylindrical connector pipe having the other side protrusion for connecting the hinge pin to the other link and rotatably supporting the support member.

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