JPWO2015151163A1 - Vehicle seat slide device - Google Patents

Abstract

A vehicle seat slide device (1) includes a movable rail (3) slidable on a fixed rail (2), and a bottom wall (6) of the fixed rail (2) provided at both longitudinal ends of the movable rail (3). A main roller (5) that can roll on, a bracket (7) that is rotatably supported by the movable rail (3) via a pin (10) independently in the short direction of the movable rail (3), An urging portion (11) attached to the movable rail (3) to press the one end portion (7d) of the bracket (7) to always apply a rotational urging force about the pin (10) to the bracket (7); A sub-roller (8) is provided which is arranged at the other end (7e) of the bracket (7) and is capable of rolling in contact with the top wall (4) of the fixed rail (2) by receiving the rotational biasing force.

Description

  The present invention relates to a vehicle seat slide device.

  Patent document 1 discloses a vehicle seat slide device to which the present invention relates. The related vehicle seat slide device includes a lower rail, an upper rail, a main roller, a sub roller, and a coil spring. The lower rail is formed in an inverted U-shaped cross section having a bottom wall and a top wall parallel to the bottom wall, and left and right opening edges are bent inward in the opposing direction. The upper rail is provided with main rollers that roll on the bottom wall at both ends in the longitudinal direction, and slidably engages the lower rail and slides along the lower rail. The sub roller is provided in the vicinity of the main roller. The coil spring urges the sub roller upward to contact the top wall, and at this time, the main roller contacts the bottom wall by the reaction force received by the sub roller. The lower rail is supported by the vehicle body. The upper rail supports the seat.

JP 2007-069694 A

  Since the lower rail supported by the vehicle body is not limited to the lower side, it is hereinafter referred to as a fixed rail. Moreover, since the upper rail is not limited to the upper side, it is hereinafter referred to as a movable rail. In the related vehicle seat slide device, since the fixed rail is supported by the vehicle body, if the dimensional accuracy of the vehicle body is not as designed, the fixed rail itself is fixed by fixing the fixed rail to the vehicle body. It may be deformed. Further, the dimensional accuracy of the movable rail itself and the fixed rail itself engaged with the fixed rail may not be as designed. In such a case, the movable rail may not be able to slide smoothly with respect to the fixed rail by applying a load that is biased by the main roller or the sub roller to the movable rail engaged with the fixed rail.

  An object of the present invention is to provide a vehicle seat slide device in which a movable rail engaged with the fixed rail can smoothly slide even if the fixed rail and the movable rail are deformed in a state not designed.

  According to an aspect of the present invention, a fixed rail having a bottom wall and a top wall parallel to the bottom wall having an opening and a U-shaped cross section is formed, and a part of the fixed rail is disposed in the fixed rail to fix the fixed wall. A movable rail movable along the rail, and provided at both ends in the longitudinal direction of the movable rail independently in the short direction of the movable rail, and on the bottom wall of the fixed rail by the movement of the movable rail. A main roller capable of rolling, a bracket that is pivotally supported by the both ends of the movable rail via a pin independently in the short direction of the movable rail, and is rotatably attached to the movable rail; An urging portion that presses one end of the bracket to always apply a rotational urging force about the pin to the bracket; and an other end opposite to the one end of the bracket across the pin. Arranged said And summarized in that always pressed against the top wall of the fixed rail receiving said rotational bias by energization unit is a vehicle seat sliding apparatus having a rollable auxiliary roller.

   Further, at least one of both end portions in the longitudinal direction of the movable rail is provided independently in the short direction of the movable rail, and the bracket has a lever at the one end portion of the bracket. May be.

  Further, the urging portion may be a damper that presses each of the levers.

  The bracket may have an engaging portion that can engage with the movable rail.

  Further, the spring constant of one of the levers located on one end side in the longitudinal direction of the movable rail is larger than the spring constant of the other lever located on the other end side opposite to the one end part. May be.

  According to the said structure, the bracket is provided independently in the transversal direction of the movable rail. For this reason, even if a fixed rail and a movable rail deform | transform in the state which is not as a design, the movable rail engaged with a fixed rail can slide smoothly.

FIG. 1 is a perspective view of a movable rail of a vehicle seat slide device according to an embodiment of the present invention. FIG. 2 is an enlarged cross-sectional view of the movable rail of FIG. 1 and a fixed rail incorporating the movable rail. FIG. 3 is a bottom view according to the arrow DA in FIG. FIG. 4 is a perspective view showing movable parts assembled to the movable rail of FIG. 1, with the movable rail omitted. FIG. 5 is a side view according to the arrow DB of FIG. 6 is an enlarged bottom view of a part of FIG.

  The following configuration achieves the object of providing a vehicle seat slide device that allows the movable rail that engages the fixed rail to slide smoothly even if the fixed rail and the movable rail are deformed in a state that is not as designed. did. That is, the vehicle seat slide device includes a fixed rail having a bottom wall and a top wall parallel to the bottom wall having an opening, and a part of the fixed rail is disposed in the fixed rail. A movable rail movable along the fixed rail, and provided at both ends in the longitudinal direction of the movable rail independently in the short direction of the movable rail, and the bottom of the fixed rail by the movement of the movable rail A main roller that can roll on a wall, a bracket that is pivotally supported on the both ends of the movable rail independently of the movable rail in the short direction via pins, and a movable rail An urging portion that is attached and presses one end of the bracket to always apply a rotational urging force about the pin to the bracket; and the other side opposite to the one end of the bracket across the pin end Constantly pressed against the top wall of the fixed rail is positioned by receiving the rotational biasing force by the biasing portion to be provided with a rollable auxiliary roller.

  Hereinafter, a vehicle seat slide apparatus 1 according to an embodiment of the present invention will be described with reference to FIGS. The vehicle seat slide device 1 includes a fixed rail 2, a movable rail 3, main rollers 5 and 5, brackets 7 and 14, a lever 7 c, a sub roller 8, and an urging portion 11.

  The fixed rail 2 has a substantially U-shaped cross section and is bent inward from the bottom walls 6 and 6, side walls 15 and 15 erected upward from the bottom walls 6 and 6, and the tops of the side walls 15 and 15. As a result, the bottom walls 6 and 6 are provided with top walls 4 and 4 that extend substantially parallel to each other and face each other. At the free ends of the top walls 4, 4, opening edges 2 a, 2 a are formed that define a gap (opening) through which a flat plate portion 3 d described later of the movable rail 3 can pass.

  The movable rail 3 is extrusion-molded into a T-shaped portion 3a having a T-shaped inverted section and a side portion 3b connected to the T-shaped portion 3a and formed below the T-shaped portion 3a. A well-known seat cushion frame (not shown) is coupled to a flat plate portion 3d extending to the upper side UP at the left and right center of the flange portion 3c of the T-shaped portion 3a of the movable rail 3. The side portion 3b of the movable rail 3, the flange portion 3c, and the lower LWR portion of the flat plate portion 3d are disposed in the fixed rail 2. The lower LWR portion of the flat plate portion 3d is slidable along the fixed rail 2 to the front side FR and the rear side RR in the opening edges 2a and 2a of the fixed rail 2.

  The main rollers 5 and 5 are rotatably supported at both ends in the longitudinal direction of the movable rail 3, that is, at the front FR and rear RR ends of the movable rail 3. More specifically, the main rollers 5 and 5 are incorporated into the end portions of the front side FR and the rear side RR of the movable rail 3 from both the left and right sides, and are through holes (not shown) formed in the side portion 3b of the movable rail 3. It is rotatably supported with respect to the movable rail 3 through a pin 5a press-fitted into the rail. The main rollers 5 and 5 are in contact with the bottom walls 6 and 6 formed on the fixed rail 2, and roll on the bottom walls 6 and 6 by the movement of the movable rail 3.

  The brackets 7 and 14 are both formed in a U-shaped cross section with the opening facing the upper side UP. As shown in FIG. 6, the one brackets 7 and 7 are independent on the left and right (in the short direction of the movable rail 3). Further, as shown in FIG. 5, one side wall 7a, 7a of one bracket 7, 7 is formed to have a larger vertical dimension than the other side wall 7b, 7b. As shown in FIG. 6, one side wall 7a, 7a is disposed on the end side of the left-right cross section, and the other side wall 7b, 7b is disposed on the center side of the left-right cross section. A pin 10 is press-fitted into a through-hole (not shown) formed in the side portion 3b of the movable rail 3 and through-holes 7g and 7g formed in one side wall 7a and the other side wall 7b of the bracket 7, and the movable rail Brackets 7 and 7 are supported on the side portion 3b of 3. As shown in FIGS. 3 and 4, the other bracket 14 has a pin 10 press-fitted into a through hole (not shown) formed in the side 3 b of the movable rail 3 and a through hole (not shown) formed in the bracket 14. Then, a bracket 14 formed so as to extend over the side portion 3b of the movable rail 3 (formed so as not to be independent on the left and right like the bracket 7) is supported. With such a configuration, both brackets 7, 7, 14 are pivotally supported with respect to the movable rail 3 so as to be rotatable up and down.

  One end portions 7d and 14d of the brackets 7 and 14 are provided in pressure contact so that levers 7c and 14c in which the upper UP is bowed (depressed in the lower LWR) extend. The lever 7c is always pressed against the lower LWR indicated by the white arrow Y1 in FIG. 5 by a damper 11 (biasing portion) attached to the movable rail 3. That is, as shown in FIG. 5, the damper 11 always gives the brackets 7 and 7 a clockwise rotational biasing force about the pin 10. The lever 14 c is integrated with the left and right levers 14 c and 14 c by the connecting portion 13.

  The auxiliary roller 8 is rotatable up and down to the brackets 7, 7, 14 via shaft portions 8 a, 8 a that are pivotally supported by through holes 7 f, 14 f formed in the other ends 7 e, 14 e of the brackets 7, 7, 14. And can roll on the top walls 4 and 4 of the fixed rail 2. The auxiliary roller 8 is always in pressure contact with the top wall 4 as indicated by a black arrow Y2 in FIG. 5 because the end portions 7d of the brackets 7 and 7 are always urged to rotate clockwise by the damper 11. Escape portions 3 g and 3 g are formed on the side portion 3 b of the movable rail 3 so as to escape the auxiliary roller 8. The damper 11 includes a holding portion 11a held by the movable rail 3, and a main body portion 11b that presses one end portion 7d of the brackets 7 and 7 from the upper side UP to the lower side LWR. Projections 7h and 7h formed on the levers 7c and 7c of the brackets 7 and 7 engage with the recess 3h formed on the side 3b of the movable rail 3. Thereby, the movable rail 3 and the brackets 7 and 7 are positioned.

  The slide lock device 12 is engaged with and disengaged from a lock hole (not shown) of the fixed rail 2 by a shaft 12e pivotally supported by the movable rail 3, an operation lever 12a supported horizontally by the shaft 12e, and the operation lever 12a. A lock portion 12c that is moved, a coil spring 12b that is engaged and supported by the flat plate portion 3d so as to urge the lock portion 12c in the engagement direction, a shaft portion 12d that is pivotally supported by the lock portion 12c, and a shaft portion 12d and a lever 12f connecting the shaft 12e. Movable by making the spring constant of one lever 7c on one end side in the longitudinal direction of the movable rail 3 larger than the spring constant of the other lever 14c on the other end side opposite to the one end part. The vertical swing of the rail 3 is reduced. Further, even when the occupant is seated on the seat supported by the seat cushion frame, the movable rail 3 can smoothly move back and forth, and is added to the seat back generated when the occupant leans against a well-known seat back (not shown) constituting the seat. The backward falling load can be received softly by the lever 14c becoming flexible.

  According to the present embodiment, the brackets 7 and 7 are independent on the left and right (in the short direction of the movable rail 3). Therefore, even if the fixed rail 2 and the movable rail 3 are deformed by fixing to the vehicle body in a state where the shape of the vehicle body (not shown) is not as designed, the shapes of the fixed rail 2 and the movable rail 3 are designed. Even in a non-passing state, the brackets 7 and 7 can follow the deformation well, and the movable rail 3 engaged with the fixed rail 2 can slide smoothly.

  According to the present embodiment, the brackets 7 and 7 are provided such that at least one of both end portions in the longitudinal direction of the movable rail 3 is provided independently on the left and right (in the short side direction of the movable rail 3), and each end portion 7d, 7d is provided with levers 7c and 7c. For this reason, since the brackets 7 and 7 that pivotally support the auxiliary roller 8 can move freely independently from each other on the left and right, the movable rail 3 that engages with the fixed rail 2 can slide smoothly.

  According to the present embodiment, the brackets 7 and 7 are constantly urged to rotate clockwise because the levers 7c and 7c are pressed by the dampers (biasing portions) 11 respectively. Therefore, the auxiliary rollers 8 and 8 pivotally supported by the brackets 7 and 7 are always in pressure contact with the top wall 4 of the fixed rail 2. At the same time, the main rollers 5 and 5 attached to the movable rail 3 are in contact with the bottom wall 6 of the fixed rail 2. For this reason, there is no gap between the auxiliary rollers 8 and 8 and the top wall 4 of the fixed rail 2, and noise is hardly generated. Therefore, the vehicle seat slide device 1 does not generate or hardly generates noise even when it receives vibration generated as the vehicle travels.

  According to the present embodiment, the protrusions 7h and 7h formed on the levers 7c and 7c of the brackets 7 and 7 are engaged with the recesses 3h formed on the side 3b of the movable rail 3, whereby the movable rail 3 and the bracket 7 and 7 are positioned.

  According to this embodiment, of the levers 7c and 14c, the spring constant of one lever 7c on the one end side in the longitudinal direction of the movable rail 3 is the other lever 14c on the other end side opposite to the one end. Is greater than the spring constant. For this reason, the vertical swing of the movable rail 3 is reduced, and the occupant can smoothly move back and forth even when the occupant is seated on the seat supported by the seat cushion frame. In addition, the vehicle seat slide device 1 can softly receive a rearward-falling load applied to the seat back, which is generated when an occupant leans against a well-known seat back (not shown) constituting the seat.

  Since the auxiliary roller 8 is pre-assembled to the bracket 7, the number of assembly steps in the assembly line such as the fixed rail 2 can be reduced. For this reason, the assembly work process of various members is simplified.

As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, A various deformation | transformation is possible.

Claims (5)

A fixed rail having a bottom wall and a top wall parallel to the bottom wall having an opening, and having a U-shaped cross section;
A movable rail partially disposed in the fixed rail and movable along the fixed rail;
A main roller provided independently at both ends of the movable rail in the short direction of the movable rail, and capable of rolling on the bottom wall of the fixed rail by the movement of the movable rail;
Brackets that are pivotally supported so as to be rotatable up and down independently in the lateral direction of the movable rail via pins on the both ends of the movable rail;
An urging portion that is attached to the movable rail, and that constantly applies a rotational urging force about the pin by pressing one end of the bracket;
Located at the other end of the bracket opposite to the one end with the pin interposed therebetween, and can receive the rotational biasing force from the biasing portion and always press against the top wall of the fixed rail and roll. With a deputy roller,
A vehicle seat slide device comprising: In the bracket, at least one of both end portions in the longitudinal direction of the movable rail is provided independently in the short direction of the movable rail,
The vehicle seat slide device according to claim 1, wherein the bracket has a lever at the one end of the bracket. The vehicle seat slide device according to claim 1, wherein the urging portion is a damper that presses the lever. The vehicle seat slide device according to any one of claims 1 to 3, wherein the bracket includes an engaging portion that can be engaged with the movable rail. The spring constant of one said lever located in the one end part side of the said longitudinal direction of the said movable rail is larger than the spring constant of the other said lever located in the other end part side on the opposite side to the said one end part. The vehicle seat slide device according to any one of 2 to 4.

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