JP5070829B2 - Seat slide device - Google Patents

Description

  The present invention relates to a seat slide device that moves a vehicle seat in the longitudinal direction of the vehicle body relative to a floor on the vehicle body side.

  As a seat slide device for a vehicle, for example, as described in Patent Document 1 below, a pair of left and right lower rails are provided on the floor side of a vehicle body, and a pair of left and right upper rails are provided on a seat side. The upper rail is slid with respect to the lower rail together with the seat in a state where the upper rail is inserted and arranged on the lower rail.

In such a seat slide device, when the seat slides, there is a configuration in which a rolling element made of a roller or a sphere provided between the lower rail and the upper rail rotates in at least two places in the longitudinal direction of the vehicle body.
JP 2000-16241 A

  By the way, in the seat slide device as described above, when the upper rail is moved forward so that the seat protrudes forward of the vehicle body with respect to the lower rail, when the vehicle is impacted from the rear, for example, the seat (upper rail) ) Receives a force in the direction of rotating upward, with the slide support portion on the vehicle body rear side among the slide support portions provided with at least two rolling elements in the vehicle longitudinal direction, The side edge of the upper rail in the above-described slide support portion on the front side of the vehicle body may be deformed by being pressed through the rolling element to the upper surface inside the lower rail.

  In view of the above, an object of the present invention is to prevent the deformation of the upper rail when the vehicle receives an impact from the front-rear direction of the vehicle body with the seat moved so as to protrude forward of the vehicle body with respect to the lower rail.

The present invention provides a seat slide device for moving a vehicle seat in a vehicle longitudinal direction with respect to a floor on a vehicle body side, wherein a lower rail is provided on the floor so as to extend in the vehicle longitudinal direction, while the vehicle rail longitudinal direction is provided with respect to the lower rail. The lower rail is provided with a bottom wall and upper walls rising from both side edges of the bottom wall, and the upper rail is connected to the bottom wall via lower rolling elements. A movable upper rail bottom wall, and an inclined wall that extends obliquely upward in a direction approaching each other from both side edges of the upper rail bottom wall and is movable with respect to the upper wall of the lower rail via an upper rolling element, respectively. And the upper rail bottom wall and the inclined wall are located in a space surrounded by the bottom wall and the top wall of the lower rail. The reinforcement portion against the direction of force which the inclined wall is pushed from the upper rolling element, disposed in the vicinity of the upper rail bottom wall in said inclined wall of the upper rail, the reinforcing section, the inclined wall and the upper rail bottom wall The most main feature is that a bar-like member extending in the extension direction of the upper rail is provided inside the corner portion of the boundary portion .

According to the present invention, with the seat moved so as to protrude forward of the vehicle body relative to the lower rail, the vehicle receives an impact from the longitudinal direction of the vehicle body and receives a force in a direction in which the inclined wall of the upper rail is pushed from the upper rolling element. However, since the reinforcement part which opposes this is provided in the upper rail, a deformation | transformation of especially an inclined wall of an upper rail can be prevented.
Moreover, since the reinforcement part is provided in the vicinity of the upper rail bottom wall in the inclined wall, it is possible to reliably prevent the bending deformation toward the inside of the inclined wall with the corner as the starting point.
Furthermore, since the reinforcing portion is configured by providing a rod-like member extending in the extending direction of the upper rail inside the corner portion of the boundary portion between the inclined wall and the upper rail bottom wall, it is possible to suppress an increase in cost as a simple configuration.

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

  1 is an exploded perspective view showing a seat slide device for a vehicle seat according to an embodiment of the present invention, FIG. 2 is a side view thereof, FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2, and FIG. It is BB sectional drawing. 1 and 2, the direction indicated by the arrow F in FIGS. 1 and 2 is the vehicle front side, and the directions indicated by the arrows X and Z are the vehicle width direction and the vehicle vertical direction, respectively.

  The seat slide device described above includes a lower rail 1 that extends in the vehicle body longitudinal direction, and an upper rail 3 that slides and moves in the vehicle body longitudinal direction with respect to the lower rail 1. The rails 1 and 3 are spaced apart from each other at a predetermined interval in the vehicle width direction. It is arranged on the floor 5 of the vehicle body. That is, the two lower rails 1 are fixed on the floor 3 shown in FIG. 2, while the two upper rails 3 are fixed to the lower surface of the seat 7, whereby the seat 7 is attached to the lower rail 1 on the floor 5 side together with the upper rail 3. On the other hand, it slides in the longitudinal direction of the vehicle.

  However, in reality, the rail pair composed of the lower rail 1 and the upper rail 3 described above is used so as to be symmetrical with respect to one seat 7 along the vehicle width direction. That is, the rail pair shown in FIG. 1 is used on the left side in the vehicle width direction, and the symmetrical rail pair (particularly the upper rail 3) is used on the right side.

  As shown in FIGS. 3 and 4, the lower rail 1 includes a bottom wall 1a, left and right side walls 1b rising from both side edges of the bottom wall 1a, and the bottom wall 1a in a direction approaching each other from the upper ends of the side walls 1b. An upper wall 1c extending in parallel with each other, and an inner wall 1d extending in parallel with the side wall 1b downward from the inner end of each of the upper walls 1c spaced apart from each other. It is formed by bending a plate material.

  Here, the side wall 1b and the upper wall 1c described above constitute an upper wall of the lower rail 1. Further, the left and right inner side walls 1d are spaced apart from each other at a predetermined interval, and the lower ends thereof are located slightly above the central portion in the vertical direction of the side wall 1b.

  Further, as shown in FIG. 1, a plurality of locking claws 9 for locking the upper rail 3 to the lower rail 1 are provided at equal intervals along the longitudinal direction of the vehicle body, as shown in FIG. In the rail pair shown in FIG. 1, among the lock claws 9 provided on the left and right inner walls 1d, the actually used one is a broken line located on the front side (the vehicle width direction outer side) in FIG. It is a lock claw 9 shown by.

  Further, as shown in FIG. 2, front and rear brackets 11 and 13 for fixing the lower rail 1 to the vehicle body (floor 5) are respectively provided at the lower portions of both ends of the lower rail 1 in the vehicle body front-rear direction. 11 and 13 are omitted in FIG.

  On the other hand, the upper rail 3 is formed by joining two plate members together to form a joint portion 3a that becomes a vertical wall, and the lower portion of the joint portion 3a is connected to the inner wall of the lower rail 1 as shown in FIGS. 1d is inserted in the center between each other. At this time, the lower end of the joint portion 3a is positioned slightly below the lower end of the inner wall 1d, and the upper rail bottom wall 3b extending horizontally from the lower end of the joint portion 3a in a direction away from each other in the vehicle width direction is continuously bent. Further, an inclined wall 3c extending from the both side edges of the upper rail bottom wall 3b obliquely upward in a direction approaching each other is formed by bending.

  Therefore, the upper rail bottom wall 3b and the inclined wall 3c of the upper rail 3 are located in a space 17 surrounded by the bottom wall 1a and the upper wall (side wall 1b, upper wall 1c) of the lower rail 1 described above.

  At two places in the longitudinal direction of the vehicle body of the upper rail 3, slide support portions 19 and 21 are provided at predetermined intervals when the upper rail 3 slides in the longitudinal direction of the vehicle body with respect to the lower rail 1. These slide support portions 19 and 21 have the same structure, and are shown in an exploded perspective view in FIG.

  The slide support portions 19 and 21 are interposed between the upper rail 3 and the lower rail 1 so as to cover the lower portion of the upper rail 3 as shown in FIG. The holder 23 is formed by bending one thin plate, and extends by bending upward from both sides of the roller holder 23a and the roller holder 23a located below the bottom wall 1a of the lower rail 1. And a spherical body holding part 23b.

  The roller holding portion 23a is provided with an opening 23c that accommodates the roller 25 as a lower rolling element in a rotatable state. The left and right spherical holding portions 23b rotate a sphere 27 made of a rigid body as an upper rolling element. Two openings 23d that can be accommodated in a possible state are provided along the longitudinal direction of the vehicle body.

  Then, in a state where the roller 25 is accommodated in the opening 23c of the roller holding portion 23a and the sphere 27 is accommodated in the opening 23d of the sphere holding portion 23b, the holder 23 is connected to the lower rail 1 and the upper rail as shown in FIGS. 3 between. Thus, the roller 25 can rotate between the lower rail 1 and the upper rail 3 while contacting the bottom wall 1a of the lower rail 1 and the upper rail bottom wall 3b of the upper rail 3, respectively. , While being in contact with the vicinity of the boundary portion and the inclined wall 3c of the upper rail 3, they can rotate between each other.

  The two holders 23 in a state where the roller 25 and the sphere 27 are accommodated, that is, the slide support portions 19 and 21 are arranged at a predetermined position with a predetermined interval in the vehicle longitudinal direction between the lower rail 1 and the upper rail 3. In this state, stopper members 29 and 31 are provided in the vicinity of the vehicle body front side end portion and the rear side of the bottom wall 1a of the lower rail 1, respectively.

  The slide support portions 19 and 21 are disposed between the stopper members 29 and 31 so as to be appropriately separated from the stopper members 29 and 31. Thereby, when the upper rail 3 is moved to the front side of the vehicle body with respect to the lower rail 1, the roller 25 of the front slide support portion 19 comes into contact with the front stopper member 29 to restrict the forward movement, and the upper rail When 3 is moved to the rear side of the vehicle body with respect to the lower rail 1, the roller 25 of the rear slide support portion 21 comes into contact with the rear stopper member 31 to restrict the rearward movement.

  An unlocking swing arm 33 extending in the front-rear direction of the vehicle body is provided at the joint portion 3 a of the upper rail 3 in FIG. 2 so as to be rotatable about the rotation support pin 35. A lock release lever (not shown) for operation by the occupant is connected to the front end 33a extending forward of the vehicle body of the rocking arm 33 for unlocking.

  In the vicinity of the rear end portion 33b of the unlocking swing arm 33 extending rearward of the vehicle body, a spring rear portion locking projection 33c is provided so as to protrude into a through hole 3d provided in the joint portion 3a of the upper rail 3. The rear end 37a of the rod-shaped spring 37 on the rear side of the vehicle body is locked to the spring rear locking protrusion 33c from below. On the other hand, the front end 37 b of the rod-shaped spring 37 on the front side of the vehicle body is a spring front portion latched and raised from the joint portion 3 a on the front side of the vehicle body to the side opposite to the unlocking swing arm 33 from the rotation support pin 35. The protrusion 3e is locked from above.

  That is, in the rod-shaped spring 37 described above, the rear end 37a presses the unlocking swing arm 33 upward via the spring rear locking projection 33c, while the front end 37b presses the spring front locking projection 3e downward. Yes. As a result, the rocking arm for unlocking 33 is always pressed upward by the rod-shaped spring 37 toward the rear end 33b, so that it rotates around the rotation support pin 35 in the counterclockwise direction in FIG. It becomes a pressed state.

  On the other hand, at the lower end of the rear end portion 33b of the rocking arm 33 for unlocking, as shown in FIG. 4, there is provided a lock piece 33d that bends approximately 90 degrees toward the joining portion 3a side of the upper rail 3 and extends horizontally. The lock piece 33d is provided with a lock hole 33e into which the lock claw 9 provided on the inner wall 1d of the lower rail 1 is inserted. The upper rail 3 at a position corresponding to the lock piece 33d is provided with a notch 3f, and the lock piece 33d is inserted into the notch 3f.

  That is, at the normal time, as shown in FIG. 2, the unlocking swing arm 33 is pressed against the lock hole 33e by being pressed in the counterclockwise direction about the rotation support pin 35 by the rod-shaped spring 37. The lock claw 9 of the lower rail 1 is inserted. In this state, the upper rail 3 is locked with respect to the lower rail 1, and the seat 7 is restricted from moving in the vehicle longitudinal direction with respect to the floor 5.

  When the occupant operates a lock release lever (not shown) from the locked state of FIG. 2 and pulls up the front end 33a of the rocking arm for unlocking 33 against the elastic force of the rod-shaped spring 37, the unlocking lever is released. The swing arm 33 rotates around the rotation support pin 35 in the clockwise direction in FIG. As a result, the rocking arm 33 for releasing the lock is in a state where the lock piece 33d of the rear end portion 33b is moved and displaced downward from the state of FIG. 4 and the lock hole 33e is released from the lock claw 9 and unlocked. 7 can move in the vehicle longitudinal direction with respect to the floor 5.

  In this unlocked state, the occupant slides the seat 7 to an appropriate position, stops it at a desired position, and releases the lock release lever, so that the rocking arm 33 for unlocking the restoring force of the rod spring 37 Therefore, it moves in the direction opposite to that at the time of unlocking, and the lock hole 33e is engaged with the lock claw 9 to be locked.

  A reinforcing rod member 39 as a reinforcing portion as shown in a perspective view in FIG. 6 is disposed inside the corner portion 3g having the R shape at the boundary portion between the upper rail bottom wall 3b and the inclined wall 3c of the upper rail 3 described above. ing.

  The reinforcing rod member 39 is composed of a rod-like member extending in the extending direction of the upper rail 3 as a whole, and includes a pair of left and right straight portions 39a extending in parallel with each other, and one end portion of each straight portion 39a (on the right side in FIG. 6). End portions) and connecting portions 39b for connecting each other.

  Here, in the reinforcing rod member 39, the pair of left and right straight portions 39a described above are arranged inside the left and right corner portions 3g of the upper rail 3, but in a natural state before the arrangement, in FIG. As shown by the two-dot chain line, each linear portion 39a has a shape that spreads away from each other with respect to the arrangement state on the corner portion 3g.

  The linear portions 39a are elastically deformed in a direction approaching each other so as to be in an arrangement state from such a spread shape to the corner portion 3g, and are arranged inside the corner portion 3g of the upper rail 3 in this state. Therefore, in the reinforcing rod member 39 disposed inside the corner portion 3g, the force when restoring each linear portion 39a in the expanding direction acts on the inner side of the corner portion 3g, and on the inner side of the corner portion 3g. Since it is in a press-fitted state, it is firmly attached to the upper rail 3.

  The reinforcing rod member 39 is disposed on the inner side of the corner portion 3g. Before assembling the upper rail 3 to the lower rail 1, the entire reinforcing rod member 39 is removed from the gap between the joint portion 3a and the inclined wall 3c. Is moved downward, or the tip of the straight portion 39a is inserted from the end opening of the upper rail 3 on the vehicle body rear side.

  Next, in such a seat slide device, as shown in FIG. 2, the state in which the seat 7 is moved to the vicinity of the end portion on the front side of the vehicle body, in other words, the roller 25 in the slide support portion 19 on the front side of the vehicle body is Let us consider a case where an impact is received, for example, when another vehicle collides with a vehicle equipped with the seat slide device from behind in a state in which the stopper member 29 on the front side is approached or in contact.

  In this case, since the heavy seat 7 is positioned so that the front end protrudes toward the vehicle front side with respect to the lower rail 1, the upper rail 3 together with the seat 7 slides behind the lower rail 1 with the slide support portion 21. A force acts in a direction to rotate in the direction indicated by the arrow C in FIG.

  At this time, the upper rail 3 tends to move upward with respect to the lower rail 1 on the front side of the vehicle body from the rear slide support portion 21 serving as the center of rotation. Therefore, the inclined wall 3c of the upper rail 3 shown in FIG. 1 is pressed toward the vicinity of the boundary between the side wall 1b and the upper wall 1c.

  At this time, the inclined wall 3c receives a pressing reaction force from the sphere 27 made of a rigid body. However, since the reinforcing rod member 39 is provided at the corner 3g inside the inclined wall 3c, the inclined wall 3c is provided. It is possible to prevent bending deformation to the inside of 3c, and to secure the desired function as a subsequent seat slide device by preventing the occurrence of rattling.

  Further, since the reinforcing rod member 39 as the reinforcing portion is provided in the vicinity of the upper rail bottom wall 3b in the inclined wall 3c, it is bent and deformed toward the inside of the inclined wall 3c starting from the corner 3g. Can be reliably prevented.

  Further, the reinforcing rod member 39 as the reinforcing portion is configured by providing a rod-like member extending in the extending direction of the upper rail 3 inside the corner portion 3g of the boundary portion between the inclined wall 3c and the upper rail bottom wall 3b. As a simple configuration, an increase in cost can be suppressed.

  The reinforcing rod member 39, which is a rod-shaped member, includes a pair of left and right straight portions 39a extending in parallel with each other, and a connecting portion 39b that connects one end of each of the straight portions 39a. Since 39a is arranged inside each corner 3g of the boundary portion between each inclined wall 3c and upper rail bottom wall 3b, the reinforcing rod member to be used in spite of setting the reinforcing portions at two places 39 is sufficient, and the assembly workability is improved by minimizing the number of parts.

  Further, the reinforcing rod member 39, which is a rod-shaped member, is configured to be elastically deformable, and each linear portion 39a is spaced from the inside of each corner portion 3g in a natural state before being placed inside each corner portion 3g. In the assembled state that is further spread out and arranged inside each corner 3g, the inclined walls 3c are pressed in the direction of expanding each other, so there is no need to separately provide a dedicated fixing means for the upper rail 3, and assembling workability And it can contribute to cost reduction.

  In the above-described embodiment, it is assumed that the vehicle equipped with the seat slide device is subjected to an impact such as a collision with another vehicle from behind, but the seat slide device is provided contrary to this. In the state of FIG. 2, when the vehicle is impacted by another vehicle colliding with the vehicle from the front, the upper rail 3 together with the seat 7 with respect to the lower rail 1 in FIG. A force acts in the direction of rotation in the direction indicated by arrow D.

  At this time, since the upper rail 3 tends to move upward with respect to the lower rail 1 on the rear side of the vehicle body from the front slide support portion 19 serving as the rotation center, the inclined wall 3c of the lower rail 1 is formed on the spherical body 27 in the same manner as described above. The inclined wall 3c that receives the pressing reaction force from the sphere 27 is prevented from being deformed by the reinforcing rod member 39 in the same manner as described above.

  Instead of the reinforcing rod member 39 described above as a reinforcing portion, a bead or a rib for reinforcement may be provided at the corner portion 3g. In this case, new processing is performed on the upper rail 3, but it is not necessary to use a separate member such as the reinforcing rod member 39 as the reinforcing portion, so that the number of parts can be reduced accordingly.

It is a disassembled perspective view which shows the seat slide apparatus concerning one Embodiment of this invention. It is a side view of the seat slide apparatus of FIG. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is a disassembled perspective view of the slide support part of the seat slide apparatus of FIG. It is a perspective view of the rod member for reinforcement provided in the upper rail of the seat slide device of FIG.

Explanation of symbols

1 Lower rail 1a Lower rail bottom wall 1b Lower rail side wall (upper wall)
1c Upper wall of the lower rail (upper wall)
3 Upper rail 3b Upper rail bottom wall 3c Upper rail inclined wall 3g Corner of boundary between upper rail inclined wall and upper rail bottom wall 5 Vehicle body side floor 7 Vehicle seat 17 Surrounded by lower rail bottom wall, side wall and top wall Space 25 Roller (lower rolling element)
27 Sphere (Upper rolling element)
39 Reinforcing rod members (bar-like members, reinforcing parts)
39a Linear portion of the reinforcing rod member 39b Connecting portion of the reinforcing rod member

Claims (3)

In the seat slide device for moving the vehicle seat in the vehicle longitudinal direction relative to the floor on the vehicle body side, the lower rail is provided on the floor so as to extend in the vehicle longitudinal direction, and slides in the vehicle longitudinal direction on the lower rail. An upper rail is provided on the vehicle seat, and the lower rail includes a bottom wall and upper walls rising from both side edges of the bottom wall, and the upper rail is movable with respect to the bottom wall via a lower rolling element. Each having a bottom wall and inclined walls extending obliquely upward from both side edges of the upper rail bottom wall in a direction approaching each other, and movable with respect to the upper wall of the lower rail via an upper rolling element, and The upper rail bottom wall and the inclined wall are positioned in a space surrounded by the bottom wall and the upper wall of the lower rail, Boundary but the reinforcement portion against in the direction of the force to be pressed from the upper rolling element, disposed in the vicinity of the upper rail bottom wall in said inclined wall of the upper rail, the reinforcing portion, and the inclined wall and the upper rail bottom wall A seat slide device characterized in that a rod-like member extending in the extension direction of the upper rail is provided inside the corner of the portion . The rod-shaped member includes a pair of straight portions extending in parallel with each other and a connecting portion that connects one end of each straight portion to each other, and the pair of straight portions is connected to each inclined wall of the upper rail. The seat slide device according to claim 1 , wherein the seat slide device is disposed inside each corner of a boundary portion with the upper rail bottom wall. The rod-shaped member is configured to be elastically deformable, and each linear portion is wider than the interval between the corner inner sides in a natural state before being arranged inside the corners, and the inner sides of the corners. 3. The seat slide device according to claim 2 , wherein the inclined walls are pressed in a direction away from each other in the assembled state arranged in the seat.

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