JP2012106633A - Tilt-down seat, and its mounting structure to vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tilt-down seat and its mounting structure to a vehicle in which a work during mounting a seat back to the vehicle is simple and reduction in the weight of a bracket is possible.SOLUTION: A seat back frame 31 of the tilt-down seat 1 is engaged with a free hinge bracket provided on the inner side wall of the vehicle. A hinge pin 34 to be a rotation center when reclining and rising of the seat back is provided on the under part of a connecting portion with a cushion arm 23f in a rising state and on the rear side of the vehicle of a connecting arm.

Description

  The present invention relates to a tilt-down seat used by being installed in a vehicle and a vehicle mounting structure thereof.

  Conventionally, a tilt-down seat is known as a seat that can be tilted onto a seat cushion and converted into a loading platform (see, for example, Patent Document 1). In the seat device disclosed in Patent Document 1, a seat back and a seat cushion are connected by an interlocking mechanism. And when attaching to a vehicle, while rotating shaft is penetrated over the bracket provided in the floor of the vehicle, and the lower part of the seat back, two places of the front part of a seat cushion were provided in the floor of the vehicle via the link. It is connected with two brackets.

JP 2006-327291 A

  By the way, generally, since the space between the inner wall of the vehicle and the seat is narrow, the seat device of Patent Document 1 has a rotating shaft inserted through the bracket installed on the floor and the lower portion of the seat back when attached to the vehicle. In particular, there is a problem that workability when attaching the seat back to the vehicle is poor. Moreover, since the distance between the floor of the vehicle and the support portion of the bracket that supports the rotating shaft is long, there is a problem that the bracket becomes large and heavy.

  The present invention has been made in view of the above, and it is an object of the present invention to provide a tilt-down seat and a vehicle mounting structure for the same, in which the work for attaching the seat back to the vehicle is simple and the weight of the bracket can be reduced. And

  In order to solve the above-described problems and achieve the object, a tilt-down seat of the present invention is a seat cushion having a connecting arm that is installed in a vehicle and extends obliquely upward toward the rear on both sides of a seat portion, A seat back having a seat back frame that is tiltably and vertically connected to the seat cushion at an extended end of the connecting arm, and the seat cushion is a vehicle when tilted onto the seat cushion. In the tilt-down seat that moves downward while moving forward, the seat back frame engages with a free hinge bracket provided on the inner side wall of the vehicle, and a hinge pin serving as a rotation center when the seat back tilts and stands up is provided. A lower portion of the connecting portion with the connecting arm in the standing state, and provided on the vehicle rear side of the connecting arm. It is characterized in that is.

  In the tilt-down seat according to the present invention, the inner wall is a wall of a wheel house of the vehicle.

  In the tilt-down seat according to the present invention, in the above invention, the seat back frame is provided on the side surface of the seat back frame on the vehicle outer side above the free hinge bracket on the inner side wall. And a latch device that is engaged when held up and held in the upright state.

  In order to solve the above-described problems and achieve the object, a vehicle mounting structure for a tilt-down seat according to the present invention is a vehicle mounting structure for a tilt-down seat for mounting the tilt-down seat to the vehicle, the seat The back frame is characterized in that the outer side of the vehicle is attached to the vehicle by engaging the hinge pin with the free hinge bracket.

  According to the present invention, the seat back frame is engaged with the free hinge bracket provided on the inner wall of the vehicle, and the hinge pin serving as the center of rotation when the seat back is tilted and raised is connected to the connecting arm in the upright state. The seat back can be attached to the vehicle by engaging the hinge pin with the free hinge bracket provided on the inner wall of the vehicle. The work at the time of attaching to a vehicle is easy, and there is an effect that the weight of the bracket can be reduced.

FIG. 1 is a perspective view showing an embodiment of a tilt-down seat according to the present invention. FIG. 2 is a perspective view of the seat cushion frame and the seat back frame with the pads removed from the tilt-down seat of FIG. 1 as seen from the front right front. FIG. 3 is a perspective view of the seat cushion frame and the seat back frame of FIG. 2 as viewed from the front left front. FIG. 4 is an enlarged view in which a bracket portion disposed outside the vehicle of the main body frame is enlarged. FIG. 5 is a perspective view showing the vehicle body frame around the inner wall including the wheel house at the rear of the vehicle where the tilt-down seat is installed. FIG. 6 is an enlarged perspective view of a free hinge bracket attached to the vehicle body frame. FIG. 7 is a side view of the seat cushion frame and the seat back frame in a standing state in which the pad is removed from the seat cushion and the seat back of the tilt-down seat as viewed from the inside of the vehicle. FIG. 8 is a side view of the seat cushion frame and the seat back frame in a lying state with the pads removed from the seat cushion and the seat back of the tilt-down seat as viewed from the inside of the vehicle. FIG. 9 is a partially enlarged perspective view showing the engagement between the hinge pin and the free hinge bracket.

  Hereinafter, embodiments of a tilt-down seat and a vehicle mounting structure thereof according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In the following explanation, the tilt-down seat installed on the right side of the vehicle will be explained. In the case of “right”, “left”, “front”, “rear”, “upper” and “lower” Unless otherwise specified, all seats on the tilt-down seat are used as a reference.

  FIG. 1 is a perspective view showing an embodiment of a tilt-down seat according to the present invention. FIG. 2 is a perspective view of the seat cushion frame and the seat back frame with the pads removed from the tilt-down seat of FIG. 1 as seen from the front right front. FIG. 3 is a perspective view of the seat cushion frame and the seat back frame of FIG. 2 as viewed from the front left front. The tilt-down seat 1 has a frame structure, which will be described later, covered with a pad, and includes a seat cushion 2 and a seat back 3 as shown in FIG. As shown in FIG. 1, the seat cushion 2 has cushion arms 23f and 23g, which will be described later, extending obliquely upward from both sides of the seat portion 2a toward the rear, and the cushion arms 23f and 23g extend. The seat back 3 is connected to the end in a tiltable and upright manner.

  The seat cushion 2 and the seat back 3 are substantially rectangular frame structures using metal plates or metal pipes, and include a seat cushion frame 21 and a seat back frame 31, respectively, as shown in FIGS. ing. The seat cushion frame 21 includes a cushion panel 22 and a cushion frame 23. The seat back frame 31 includes a back frame 32 and a back panel 33.

  As shown in FIGS. 2 and 3, the cushion panel 22 is provided with side frames 22b and 22c on both sides of the front frame 22a. The side frame 22b is disposed on the right side of the cushion panel 22 on the outside of the vehicle, and is shaped so that the width in the vertical direction becomes narrower from the front to the rear. The side frame 22c is disposed on the left side of the cushion panel 22 on the inner side of the vehicle, is parallel to the entire length, and is narrower than the side frame 22b.

  As shown in FIGS. 2 and 3, the cushion frame 23 is disposed between the side frames 23 a and 23 b installed on the side frames 22 b and 22 c of the cushion panel 22 and the front and rear between the side frames 23 a and 23 b. The connecting frames 23c and 23d are spanned in the width direction. The connecting frame 23c provided at the front portion of the cushion frame 23 is provided with a bracket (not shown) in the vicinity of the side frames 23a and 23b, and the vicinity of one end of the link arm 24 is rotatably connected to the bracket. The connecting frame 23d provided at the rear portion of the cushion frame 23 is bent so as to protrude rearward in the vicinity of the side frames 23a and 23b. In the cushion frame 23, a plurality of S springs 23e are stretched in the width direction in a rectangular frame surrounded by the side frames 23a, 23b and the connecting frames 23c, 23d. Further, the side frames 23a, 23b are integrally provided with cushion arms 23f, 23g as connecting arms extending rearward and obliquely upward from the rear portion.

  As shown in FIGS. 2 and 3, the back frame 32 is a frame having a quadrangular shape in a front view in which an auxiliary frame 32b made of a metal pipe is connected in the width direction to a lower part of a main body frame 32a obtained by bending a metal pipe into a gate shape. There are connecting brackets 32c and 32d attached to the left and right of the main body frame 32a in the vicinity of the auxiliary frame 32b. The back frame 32 is rotatably connected to the extended ends of the cushion arms 23f and 23g at the connection brackets 32c and 32d by the rotation pins 32e, and tilts and stands up with respect to the seat cushion frame 21. The back frame 32 is provided with brackets 32f and 32g on the right side and the left side of the lower part on both sides of the main body frame 32a. And the hinge pin 34 is provided in the bracket 32f provided in the right side surface used as the outer side of the vehicle of the back frame 32, and is arrange | positioned at the vehicle rear side of the cushion arm 23f toward the right side.

  FIG. 4 is an enlarged view in which a bracket portion disposed outside the vehicle of the main body frame is enlarged. The hinge pin 34 is chamfered in the vicinity of a head portion 34b formed at one end of the pin shaft 34a to form a chamfered portion 34c.

  The back panel 33 is a metal plate that is attached to the back surface of the back frame 32, and is provided with uneven portions at a plurality of locations to provide rigidity. In the back panel 33, a latch device 36 supported by a bracket 35 attached to the back frame 32 is disposed approximately in the middle in the vertical direction of the right edge that is the outside of the vehicle.

  FIG. 5 is a perspective view showing the vehicle body frame around the inner wall including the wheel house at the rear of the vehicle where the tilt-down seat 1 is installed. FIG. 6 is an enlarged perspective view of a free hinge bracket attached to the vehicle body frame. As shown in FIG. 5, in the vehicle body frame F, a free hinge bracket BFH is attached at a position facing the hinge pin 34 of the inner wall WI of the wheel house, and a striker ST is attached above the free hinge bracket BFH.

  Here, in the free hinge bracket BFH, as shown in FIG. 6, a locking piece SH is formed by bending between the attachment pieces SF on both sides in a step shape. The locking piece SH accommodates the insertion groove RI inserted through the chamfered portion 34c provided on the hinge pin 34 and the chamfered portion 34c at a position adjacent to the insertion groove RI, and the chamfered portion 34c rotates around the pin axis. And a rotation groove R that allows the Each mounting piece SF is formed with a screw hole H for screwing the free hinge bracket BFH to the inner wall WI. Further, the striker ST engages with a latch device 36 provided on the back panel 33 when the seat back 3 is raised to hold the seat back 3 in an upright state.

  When the tilt-down seat 1 configured as described above is attached to a vehicle, as shown in FIG. 1, the other end of each link arm 24 is connected to a link attachment bracket BL provided on the floor of the vehicle. Then, as shown in FIG. 2, the hinge pin 34 is engaged with the free hinge bracket BFH, and the bracket 32g provided on the left side surface of the back frame 32 is rotated to the frame mounting bracket BF as a free hinge provided on the floor of the vehicle. Mounted by axis AB.

  As a result, the seat back frame 31 rotates about the center of the rotation axis AB of the frame mounting bracket BF on the left side, and the center of the rotation axis AB coincides with the axis of the hinge pin 34. The right side rotates about the axis of the hinge pin 34 as the center of rotation. For this reason, the tilt-down seat 1 can smoothly tilt and stand the seat back 3 with respect to the seat cushion 2.

  The tilt-down seat 1 is attached to the vehicle with the seat back 3 slightly tilted with respect to the seat cushion 2.

  FIG. 7 is a side view of the seat cushion frame and the seat back frame in a standing state in which the pad is removed from the seat cushion and the seat back of the tilt-down seat as viewed from the inside of the vehicle. FIG. 8 is a side view of the seat cushion frame and the seat back frame in a lying state with the pads removed from the seat cushion and the seat back of the tilt-down seat as viewed from the inside of the vehicle. Hereinafter, the movement of the seat cushion frame 21 and the seat back frame 31 accompanying the tilting and standing of the seat back 3 will be described with reference to FIGS. 7 and 8. As shown in FIGS. 7 and 8, the frame mounting bracket BF is installed on the floor FB of the vehicle, and the link mounting bracket BL is installed on the base FBL.

  When the seat back 3 is tilted after releasing the engagement between the latch device 36 and the striker ST, the tilt-down seat 1 moves the seat back 3 and the extended ends of the cushion arms 23f and 23g as shown in FIG. The seat cushion frame 21 moves forward (to the left in FIG. 7) while rotating counterclockwise around the axis of the pivot pin 32e to be connected and tilting onto the seat cushion 2. For this reason, the link arm 24 rotates counterclockwise around the link mounting bracket BL, and the front side of the seat cushion frame 21 sinks.

  As a result, the seat cushion frame 21 further moves forward from the position shown in FIG. 7 (to the left in FIG. 7), and the link arm 24 rotates to a position that is substantially horizontal around the link mounting bracket BL. As shown in FIG. 8, the seat back frame 31 falls down.

  On the other hand, when the seatback 3 in a lying state is erected, the seatback 3 is caused to move backward with the front edge of the vehicle in the vehicle longitudinal direction. Then, as the seat back 3 rises, the seat back frame 31 moves from the state shown in FIG. 8 to the rear of the vehicle, and the link arm 24 rotates clockwise about the link mounting bracket BL. The front side of the seat cushion frame 21 rises.

  As a result, as shown in FIG. 7, the seat cushion frame 21 moves to the rear of the vehicle (to the right in FIG. 7), and the link arm 24 rotates to a position where the link arm 24 stands substantially around the link mounting bracket BL. The seat back frame 31 stands up to a position where it can be seated. At this time, the tilt-down seat 1 is engaged with the striker ST attached to the vehicle body frame F by the latch device 36, so that the seat back frame 31 is held upright.

  FIG. 9 is a partially enlarged perspective view showing the engagement between the hinge pin and the free hinge bracket. When the seat back frame 31 is tilted and stood up, the left side of the seat back frame 31 rotates about the center of the rotation axis AB of the frame mounting bracket BF, and the right side rotates about the axis of the hinge pin 34 as the rotation center. Because it rotates, it tilts smoothly and stands up. Moreover, as shown in FIG. 3, the hinge pin 34 is provided on a bracket 32f provided on the vehicle rear side of the cushion arm 23f. For this reason, when the seat back frame 31 is tilted and raised with respect to the seat cushion frame 21, the hinge pin 34 does not collide with the cushion arm 23f and can operate smoothly.

  Further, when the seat back frame 31 is tilted and stood up, the hinge pin 34 rotates with the chamfer 34c engaged with the rotation groove R as shown by an arrow in FIG. Since it is in contact with the back surface, it cannot be pulled out from the rotation groove R in the pin axis direction. Further, since the chamfered portion 34c only rotates in the rotation groove R, the hinge pin 34 does not move away from the free hinge bracket BFH by moving to the insertion groove RI side, and reliability in use of the tilt down seat 1 is improved. Are better.

  As described above, according to the tilt-down seat 1 and its vehicle mounting structure, when the seat back 3 is mounted on the vehicle, the hinge pin 34 is mounted on the right side of the seat back frame 31 at a position facing the inner wall WI of the wheel house. It can be attached simply by engaging with the free hinge bracket BFH. For this reason, compared with the conventional case where both sides of the seat back frame 31 are attached to the vehicle by the frame mounting bracket BF, the work for attaching the seat back 3 to the vehicle is simplified. Further, since the free hinge bracket BFH has a short distance from the hinge pin 34 and is smaller than the frame mounting bracket BF, the free hinge bracket BFH can be lighter than the frame mounting bracket BF.

  In addition, by providing the free hinge bracket BFH on the inner wall WI of the wheel house, there is no need to use the frame mounting bracket BF. Therefore, a seat belt anchor is mounted on the lower part of the seat back frame 31 on the free hinge bracket BFH side. It is possible to secure a space for attaching directly to the floor.

  On the other hand, the tilt-down seat 1 is configured such that a hinge pin 34 is provided on the lower right side of the seat back frame 31 so that the cushion arm 23 f of the seat back frame 31 is positioned on the front side of the hinge pin 34. In this case, the right side of the seat back frame 31 is located outside the vehicle, and the opening of the door is disposed from the middle to the front side of the seat back frame 31, so the cushion arm 23f obstructs the passenger to get on and off. There is nothing.

  Further, when the seat back 3 is erected, the tilt-down seat 1 protrudes from the upper surface of the seat portion 2a on both sides of the rear portion of the seat cushion 2 as shown in FIG. For this reason, there is a concern that the cushion arms 23f and 23g may become an obstacle when the occupant moves between adjacent tilt-down seats 1. However, in recent years, the vehicle has been erected from the seat cushion 2 so that the buckle of the seat belt is conspicuous due to the obligation to wear the seat belt when boarding. For this reason, since the occupant moves so as not to contact the buckle, the cushion arms 23f and 23g do not obstruct the movement.

  In the above-described embodiment, the tilt-down seat installed on the right side of the vehicle has been described. However, in the case of the tilt-down seat installed on the left side of the vehicle, the hinge pin 34, the latch device 36, and the side of the cushion panel 22 are used. The frames 22b and 22c and the side frames 23a and 23b of the cushion frame 23 are arranged opposite to each other.

  The free hinge bracket BFH is provided on the inner wall WI of the wheel house. However, the free hinge bracket BFH is not limited to the wheel house as long as it is an inner wall of the vehicle. For example, the free hinge bracket BFH may be provided on the inner panel at the rear of the vehicle.

  As described above, the tilt-down seat and the vehicle mounting structure thereof according to the present invention are useful for facilitating work when mounting the seat back to the vehicle and reducing the weight of the bracket.

DESCRIPTION OF SYMBOLS 1 Tilt down seat 2 Seat cushion 21 Seat cushion frame 22 Cushion panel 22a Front frame 22b, 22c Side frame 23 Cushion frame 23a, 23b Side frame 23c, 23d Connection frame 23e S spring 23f, 23g Cushion arm 3 Seat back 31 Seat back frame 32 Back frame 32a Body frame 32b Auxiliary frame 32c, 32d Connection bracket 32e Rotating pin 32f, 32g Bracket 33 Back panel 34 Hinge pin 34a Pin shaft 34b Head 34c Chamfer 36 Latch device BFH Free hinge bracket F Body frame H Screw hole R Rotating groove RI Insertion groove ST Striker SF Mounting piece SH Locking piece WI Inner wall

Claims (4)

A seat cushion having a connecting arm installed on the vehicle and extending obliquely upward toward the rear on both sides of the seat portion, and a seat back connected to the seat cushion at an extending end of the connecting arm so as to tilt and stand upright. In a tilt-down seat comprising a seat back having a frame, and when the seat back is tilted onto the seat cushion, the seat cushion descends while moving forward in the vehicle,
The seat back frame engages with a free hinge bracket provided on the inner side wall of the vehicle, and a hinge pin serving as a center of rotation when the seat back is tilted and raised is connected to the connecting arm in the standing state. A tilt-down seat, which is a lower part and is provided on the vehicle rear side of the connecting arm.   The tilt-down seat according to claim 1, wherein the inner wall is a wall of a wheel house of the vehicle.   The seat back frame includes a latch device that engages with an engaging means provided on the side wall of the seat back frame on the vehicle outer side above the free hinge bracket on the inner wall at the time of standing and holds the seat back frame in a standing state. The tilt-down seat according to claim 1, wherein the tilt-down seat is provided. A vehicle mounting structure for a tilt-down seat for mounting the tilt-down seat according to any one of claims 1 to 3 to the vehicle,
The vehicle seat mounting structure for a tilt-down seat, wherein the seat back frame has the hinge pin engaged with the free hinge bracket to attach the outer side of the vehicle to the vehicle.

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