JP5094105B2 - Car seat equipment - Google Patents

Description

  The present invention relates to a seat device for an automobile provided with a seat having a so-called tumble mechanism that is rotatably supported between a seating position and a folding position.

  As this type of seat device, for example, as shown in FIG. 8, a seat 50 having a seat cushion 51 and a seat back 52 is supported by a seat support member 53 so as to be slidable in the vehicle longitudinal direction, A structure in which the seat cushion 51 is rotatably supported between a folding position where the seat cushion 51 is substantially erected forward is generally used (see Patent Documents 1 and 2, for example).

  In such a seat apparatus, the front end portion of the seat support member 53 is pivotally supported by a hinge member 55 fixed to the floor portion 54, and is a lock member configured to be detachable from a striker 56 fixed to the floor portion 54. 57 is fixed to the rear end portion of the seat support member 53, and a belt anchor 59 is rotatably connected to the lock member 57 by a connecting pin 59a, and a seat belt buckle 58 is connected to the belt anchor 59. It is common.

  In this case, the belt anchor 59 is centered on the anchor arrangement area (see the solid line) centered on the hip point H1 when the seat 50 is slid to the foremost end and the hip point H2 when slid to the rearmost end. It is necessary to arrange in the wrap region 60 where the anchor placement region (see the alternate long and short dash line) wraps.

On the other hand, the lock member 57 is provided from the rear end of the seat support member 53 as much as possible in order to ensure the ease of getting on and off the foot of a rear occupant seated on a rear seat (not shown) disposed on the rear side of the seat 50. Located on the front side.
JP 2003-127734 A JP 2006-131169 A

  By the way, in the conventional seat device, the striker 56 is also arranged on the front side by the amount of the lock member 57 arranged on the front side. Is offset backward by t from the straight line D connecting. For this reason, a large bending moment is applied to the lock member 57 and the seat support member 53 by the load F acting on the belt anchor 59 at the time of a vehicle collision. As a result, it is necessary to configure the lock member 57 and the seat support member 53 with a high rigidity capable of withstanding the bending moment, resulting in a problem of increased weight and cost.

  The present invention has been made in view of the above-described conventional situation, and can efficiently transmit a load at the time of a vehicle collision from a belt anchor to a floor member via a striker, and does not require reinforcement of a seat support member or the like. It is an object to provide an automobile seat device.

The present invention relates to a seat on which an occupant is seated, a seat support member that supports the seat and is supported by a floor member so as to be rotatable between a seating position and a front folding position, and a rear portion of the seat support member A lock member configured to be engageable with and disengageable from a striker fixed to the floor member, and a belt anchor connected to the lock member or the seat support member, and the lock member of the belt anchor Alternatively, in a seat device for an automobile in which the connecting portion to the seat support member is offset rearward from the straight line connecting the striker and the seating point of the occupant, the seat is placed between the seat and the seat support member A seat rail that is movably supported in the direction is disposed, and the seat rail is fixed in the vicinity of the belt anchor connecting portion of the seat support member. Seat rail mounting bracket is attached, at the time of vehicle collision, the connecting portion of the belt anchor deformation inducing portion for deforming said sheet supporting member to approach to the straight line is provided on said sheet supporting member, the seat support member The seat rail mounting bracket is deformed along with the deformation, whereby the mounting state of the seat rail to the seat support member is maintained .

In the invention of claim 1, since the deformation inducing portion is provided in the seat support member, when a large load acts on the belt anchor at the time of a vehicle collision, the connecting portion of the belt anchor approaches a straight line connecting the striker and the hip point. The seat support member is deformed, so that the load acting on the belt anchor is efficiently transmitted from the belt anchor to the floor member via the lock member and the striker. As a result, there is no need to reinforce the seat support member or the lock member, and thus the above-described increase in weight and cost can be prevented.
Further, when the seat rail mounting bracket is deformed and extended along with the deformation of the seat support member, the seat rail mounting state is maintained, and the seat rail can be prevented from being detached from the seat support member.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  1 to 7 are views for explaining a seat device for an automobile according to an embodiment of the present invention. FIG. 1 is a side view of the seat device, and FIGS. 2 and 3 are seat rails (seat support) of the seat device. 4 is a perspective view of the seat, FIGS. 5 and 6 are exploded perspective views of the seat frame and the like, and FIG. 7 is a schematic diagram for explaining the function and effect. In the description of the present embodiment, the terms front and rear and left and right mean front and rear and left and right when viewed in a seated state.

  In the figure, reference numeral 1 denotes a seat device mounted on a floor panel (floor member) 4 of an automobile. The seat device 1 is arranged in the middle of three rows of seats arranged in the vehicle front-rear direction.

  The seat device 1 includes a seat 2 on which an occupant is seated, a lower leg (seat support member) 3 that rotatably supports the seat 2 between a seating position A and a folding position B where the seat 2 stands substantially forward. A lock member 6 disposed at the rear end 3a of the lower leg 3 and detachably connected to a gate-shaped striker 5 fixed to a floor reinforcing member (floor member) 4a, and a belt connected to the lock member 6 An anchor 7 and a buckle 7b connected to the belt anchor 7 via a buckle belt 7a are provided.

  The seat 2 includes a seat cushion 8 that supports the occupant's buttocks and a seat back 9 that supports the back. The seat cushion 8 is supported by a cushion frame 8a formed in a rectangular frame shape, and the seat back 9 is supported by a seat back frame 9a formed in a rectangular frame shape (see FIG. 6). The lower leg 3 and the lock member 6 on the lower surface of the seat cushion 9 are covered with a resin cover 13.

  The seat back 9 is supported via the forward tilt mechanism 10 so as to be rotatable between the seating position A and a forward tilt position C that contacts the upper surface of the seat cushion 8. The forward-turning mechanism 10 has a hinge plate 10a that rotatably couples the cushion frame 8a and the seat back frame 9a, and a forward-turning mechanism that allows the forward movement by releasing the lock of the seat back 9 locked to the seating position A. And a lever 10b.

  The seat cushion 8 is supported by the lower leg 3 through a pair of left and right seat rails 11 and 12 so as to be movable in the front-rear direction.

  The seat cushion 8 connects the left and right seat side hinges 16 and 16 fixed to the lower leg 3 and the floor side hinges 17 and 17 fixed to the floor panel 4 with bolts 18 and 18. Thereby, it is supported rotatably between the seating position A and the folding position B. Coil springs 19 and 19 for urging the seat cushion 8 in the folding direction are mounted on the hinge pins 18.

  The lower leg 3 is fixed by welding to a front pipe 3b extending in the vehicle width direction, a horizontal pipe 3c that bends backward after the right end of the front pipe 3b, and a rear end 3a of the horizontal pipe 3c. And a bracket 3d made of sheet metal. Reference numeral 3f 'denotes a seat rail mounting bracket for fixing the seat rail 12.

  The above-mentioned seat-side hinges 16 and 16 are fixed to the left and right ends of the front pipe 3b by welding so as to protrude forward, and the lock member 6 is connected to the inner surface of the bracket 3d with a pair of front and rear It is fixed by bolts 20 and 20. Reference numeral 20a denotes a nut fixed to the outer surface of the bracket 3d.

  The lock member 6 has a leg plate 21 whose upper end is fixed to the bracket 3d by a bolt 20, a lock position for engaging the striker 5, and a lock release position for releasing the engagement. A hook plate 22 rotatably supported by a leg plate 21; a biasing spring (not shown) that biases the hook plate 22 in a locking direction; An unlocking plate 23 that rotates the hook plate 22 in the unlocking direction and an operation lever 24 that rotates the unlocking plate 23 are provided. Reference numeral 24 a denotes a rod for connecting the release plate 23 and the operation lever 24.

  A recess 21 a into which the striker 6 can be inserted is formed in a lower edge of the leg plate 21. A hook portion 22 a that engages with and disengages from the striker 5 is formed at the lower end portion of the hook plate 22.

  An anchor connecting portion 21b is formed on the rear portion of the upper edge of the leg plate 21 so as to protrude upward, and the belt anchor 7 is rotatably connected to the connecting portion 21b by a connecting pin 25.

  A buckle 7b is connected to the belt anchor 7 via a webbing 7a. By engaging a tongue plate (not shown) with the buckle 7 b, the occupant's waist is restrained by the seat 2.

  The striker 5 is fixed to the floor reinforcing member 4 a disposed below the floor panel 4. In addition, a hole 4b having a size that allows the lock member 6 to enter is formed in a portion of the floor panel 4 that faces the lock member 6. A resin cover (not shown) is attached to the hole 4b.

  As shown in FIG. 1, the belt anchor 7 is centered on an anchor arrangement region h1 centered on a hip point H1 when the seat 2 is slid to the foremost end and a hip point H2 when slid to the rearmost end. The anchor arrangement area h2 is arranged in a wrap area Hθ.

  On the other hand, the lock member 6 is disposed such that the rear end surface 6a thereof is positioned slightly forward of the rear end surface 8a of the seat cushion 8. Accordingly, the striker 5 is displaced forward from the connecting pin 25 of the belt anchor 7, so that the connecting pin 25 is offset by t from a straight line L connecting the striker 5 and the hip point H 1 or H 2. is doing. In the present embodiment, the striker 5 is located outside the wrap region Hθ. By disposing the lock member 6 in front of the rear edge 8a of the seat cushion 8 in this way, it is possible to get on and off the rear passenger seated on the rear seat (not shown) arranged on the rear side of the seat 2 and the space of the feet. Is secured.

  The lower leg 3 is formed with a deformation inducing portion 3e for deforming the lower leg 3 so that the connecting pin 25 of the belt anchor 7 approaches the straight line L at the time of a vehicle collision. In this embodiment, the deformation inducing part 3e is configured by offsetting the rear part 3f of the horizontal pipe 3c of the lower leg 3 and the front part 3g of the horizontal pipe 3c by a in the vehicle width direction. The offset a is set to a size corresponding to the approximate radius of the horizontal pipe 3c (see FIG. 3). In addition, contrary to the offset direction of FIG. 3, the rear part 3f may be offset outward from the front part 3g.

  When the connecting pin 25 of the belt anchor 7 is offset with respect to the straight line L connecting the hip point H1 and the striker 5 as in the seat device 1 of the present embodiment (see FIG. 7A), the vehicle When a large load F acts on the belt anchor 7 at the time of collision, a large bending moment acts on the lower leg 3. However, in this embodiment, since the deformation induction part 3e was formed in the lower leg 3, the horizontal pipe 3c of the lower leg 3 is bent by the bending moment. As a result, the lock member 6 rotates forward about the striker 5, the connecting pin 25 approaches the straight line L, and the offset becomes small. Desirably, the connecting pin 25 is positioned on the straight line L, and the offset becomes zero. When the offset is thus reduced, the acting direction of the load F approaches the straight line L, and the load F is efficiently supplied from the belt anchor 7 to the floor reinforcing member 4a via the lock member 6 and the striker 7. Communicated.

  Further, the lower leg 3 is bent and the seat rail mounting bracket 3f 'is extended as shown by a two-dot line in FIG. 3, so that the mounting state of the seat rail 12 is maintained, whereby the seat rail 12 is detached from the lower leg 3. Is preventing.

Thus, in this embodiment, since the lower leg 3 is deformed to reduce the offset between the striker 5 and the connecting pin 25 in the event of a vehicle collision, it is necessary to make the lower leg 3 and the lock member 6 highly rigid. Therefore, an increase in weight and cost can be prevented.

  Further, in the present embodiment, the deformation inducing portion 3e is configured by offsetting the rear portion 3f and the front portion 3g of the horizontal pipe 3c of the lower leg 3 in the vehicle width direction, so that the collision occurs with a simple structure without increasing the number of parts. The time load can be efficiently transmitted to the floor reinforcing member 4a.

  Further, since the seat rail mounting bracket 3f 'extends along with the bending of the lower leg 3, the mounting state of the seat rail 12 to the lower leg 3 is maintained, so that the seat rail 12 can be prevented from being detached from the lower leg 3.

In the above embodiment, the deformation inducing part 3e is configured by offsetting the rear part 3f of the rear pipe 3c with respect to the front part 3g inward in the vehicle width direction, but the deformation inducing part of the present invention is limited to this. It is not a thing.

  For example, as shown by a two-dot chain line in FIG. 2, the front part 3g of the horizontal pipe 3c and the front pipe 3b are connected by a reinforcing bracket 27, and the front part 3g is made to have a relatively high rigidity compared to the rear part 3f. Thus, the rear part 3f may be used as the deformation inducing part. Further, a recess 3c 'may be formed in the front-rear direction middle portion of the horizontal pipe 3c, and the recess 3c' may be used as a deformation inducing portion. In any of these cases, substantially the same effect as in the above embodiment can be obtained.

  Furthermore, the offset a of the horizontal pipe 3c may be combined with the bracket 27 or the recess 3c '. In such a case, deformation of the horizontal pipe 3c can be induced more reliably.

It is a side view for demonstrating the seat apparatus of the motor vehicle by one Embodiment of this invention. It is a top view of the lower leg of the said sheet apparatus. It is a side view of the said lower leg. It is a perspective view of the sheet | seat of the said sheet | seat apparatus. It is a disassembled perspective view of the said sheet apparatus. It is a disassembled perspective view which shows the attachment state of the lock member of the said sheet | seat apparatus. It is a schematic diagram for demonstrating the effect of the said sheet | seat apparatus. It is a side view of the conventional general seat apparatus.

Explanation of symbols

1 sheet device 2 sheet 3 lower leg (sheet support member)
3e Deformation induction part 3f Rear part 3g Front part 4 Floor panel (floor part)
4a Floor reinforcement member (floor member)
5 striker 6 lock member 7 belt anchor 25 connection pin (connection part)
A Seating position B Folding position F Load L Straight line a Offset H1, H2 Seating point

Claims (1)

A seat on which an occupant is seated, a seat support member that supports the seat, and that is pivotally supported between a seating position and a front folding position, and a rear portion of the seat support member. A lock member configured to be detachable from a striker fixed to the floor member, and a belt anchor connected to the lock member or the seat support member, and the lock member or the seat support member of the belt anchor. In the automobile seat device in which the connecting part is offset to the rear of the vehicle from the straight line connecting the striker and the seating point of the occupant,
Between the seat and the seat support member, a seat rail that supports the seat so as to be movable in the front-rear direction is disposed,
A seat rail mounting bracket for fixing the seat rail is attached in the vicinity of the connecting portion of the belt anchor of the seat support member,
At the time of a vehicle collision, the belt support member is provided with a deformation inducing portion for deforming the seat support member so that the connecting portion of the belt anchor approaches the straight line, and
The vehicle seat device according to claim 1, wherein the seat rail mounting bracket is deformed along with the deformation of the seat support member to maintain the mounting state of the seat rail to the seat support member .

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