JP2016179773A - Vehicular seat slide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily discharge foreign matters entered a lower rail.SOLUTION: An inside wall 15 of a lower rail 2 includes: an inside wall center section 15a to be a central portion in a lower rail longitudinal direction; and inside wall end sections 15b which are located on both sides of the inside wall center section 15a in the lower rail longitudinal direction and projects to a bottom wall 11 side as compared with the inside wall center section 15a. A step 18 is formed in a portion where the inside wall end sections 15b and the inside wall center section 15a are continuous. An upper rail includes a stopper piece 27 which is cut and raised from a side wall to the outside and is engageable with the step 18. Accordingly, even if foreign matters enter between the lower rail 2 and the upper rail, the foreign matters can be easily discharged from the longitudinal direction end section.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vehicle seat slide device, and more particularly to a stopper structure that regulates a range of sliding movement of an upper rail before and after an upper rail relative to a lower rail.

  In a vehicle seat slide device, an upper rail in which a seat is coupled to a lower rail fixed to the floor of the vehicle is attached so as to be slidable in the vehicle front-rear direction, and a stopper that regulates the range of sliding movement of the upper rail relative to the lower rail Is provided.

  For example, in Patent Document 1, a lower-side stopper cut and raised from the bottom wall of the lower rail fixed to the vehicle floor, and an upper-side stopper that is formed by protruding a predetermined angle by cutting and raising a part of the upper rail, A configuration is disclosed in which the range of sliding movement of the upper rail with respect to the lower rail is regulated by engaging.

JP 2010-228759 A

  However, in such Patent Document 1, when a foreign object such as a lighter enters the lower rail, the gap between the lower side stopper cut and raised from the bottom wall of the lower rail and the upper side stopper cut and raised from the upper rail There is a risk that the foreign matter may be caught between the two and cannot be discharged. Therefore, conventionally, for example, a guide member for discharging is provided, and there is a problem that the number of parts increases and the cost increases.

  Moreover, since it is necessary to form the lower side stopper on the lower rail in a state where the lower rail and the upper rail are assembled, there is a problem that the assembling property is poor.

  The vehicle seat slide device of the present invention has a lower rail and an upper rail that is slidably mounted on the lower rail, and the position of the seat attached to the upper rail can be adjusted along the vehicle longitudinal direction. The lower rail includes a bottom wall fixed to the floor of the vehicle and a pair of outer walls, a U-shaped lower rail main body having an open top, and tips of the outer walls. An upper wall extending inward from the inner wall and an inner wall extending from the tip of the upper wall toward the bottom wall, and the upper rail has a top wall and a pair of side walls. An upper rail body portion having a U-shaped cross section with an opening at the bottom, and a bent wall extending outwardly from the tip of each side wall and entering between the outer wall and the inner side wall of the lower rail, The inner wall is An inner wall central portion which is a central portion in the lower rail longitudinal direction, an inner wall end portion which is located on both sides of the inner wall central portion in the lower rail longitudinal direction and protrudes toward the bottom wall side compared to the inner wall central portion; A step is formed at a portion where the end portion of the inner wall and the central portion of the inner wall are continuous, and the upper rail has a stopper piece that is cut and raised outward from the side wall and engageable with the step. It is characterized by that. As a result, the stopper piece is abutted against a step at a portion where the end portion of the inner wall and the central portion of the inner wall are continuous, thereby restricting the sliding movement of the upper rail with respect to the lower rail.

  Further, the vehicle seat slide device includes a lock mechanism that fixes the upper rail to the lower rail, and a slit that can be engaged with the lock mechanism is formed in the central portion of the inner wall of the lower rail in the longitudinal direction of the lower rail. You may form so that it may rank with a predetermined space | interval.

  According to the present invention, it is possible to limit the sliding movement of the upper rail with respect to the lower rail without providing a stopper piece that engages with the upper rail on the bottom wall of the lower rail. It becomes possible to discharge easily from the direction end. In addition, since it is not necessary to set a separate member for discharging the foreign matter that has entered between the lower rail and the upper rail, it is possible to prevent the cost from increasing due to an increase in the number of components.

  When the slit that can be engaged with the lock mechanism is formed at the center of the inner wall of the lower rail, the upper rail is supported by the end of the inner wall where no slit is formed when the stopper piece is abutted against the step. As a result, the strength of the lower rail when the stopper piece hits the step can be easily ensured.

1 is an exploded perspective view schematically showing a schematic configuration of a vehicle seat slide device according to the present invention. 1 is a cross-sectional view of a seat slide device according to the present invention. Sectional drawing along the longitudinal direction of a lower rail. The perspective view which expands and shows the principal part of an upper rail. Sectional drawing along the longitudinal direction of the lower rail in another Example.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1 is an exploded perspective view schematically showing a schematic configuration of a vehicle seat slide device 1 according to the present invention. FIG. 2 is a cross-sectional view of the seat slide device 1. FIG. 3 is a cross-sectional view along the longitudinal direction of the lower rail 2. FIG. 4 is an enlarged perspective view showing a main part of the upper rail 3.

  The “vertical direction” in this specification is the vertical direction in a state where the seat slide device 1 is fixed to the floor surface, and is the direction orthogonal to the floor surface, that is, the height direction of the vehicle. It shall coincide with the vertical direction of 2. Further, the “front-rear direction” in the present specification is the front-rear direction of the vehicle to which the seat slide device 1 is fixed, and coincides with the vertical direction in FIG. 2 or the left-right direction in FIGS. .

  As shown in FIG. 1, the seat slide device 1 includes a metal lower rail 2 that is fixed to the floor of a vehicle, a metal upper rail 3 that is attached to both lower portions of a seat (not shown), and an upper rail 3. A friction reducing member 4 that reduces frictional resistance when sliding in the lower rail 2 and a lock mechanism 5 that can fix the upper rail 3 to a desired position in the lower rail 2 are provided. An assembly in which the upper rail 3, the friction reducing member 4, and the lock mechanism 5 are incorporated in the lower rail 2 is disposed in parallel along the vehicle longitudinal direction between the seat and the floor surface. The pair of assemblies are linked by an operation lever 42 described later.

  As shown in FIGS. 1 and 2, the lower rail 2 has a bottom wall 11 fixed to the floor of the vehicle and a pair of outer walls 12 on both sides of the bottom wall 11, and has a U-shaped cross section with an open top. Lower rail main body 13, a pair of upper walls 14 extending inward from the tip of each outer wall 12, and a pair of inner walls 15 extending from the tip of each upper wall 14 toward bottom wall 11. And have. In other words, the lower rail 2 includes the lower rail main body 13, the upper wall 14 extending inward from the tip of the outer wall, and the inner wall 15 extending from the tip of the upper wall 14 toward the bottom wall 11. And a pair of lower rail tip portions 16 having an L-shaped cross section. Note that the upper rail 3 accommodated in the lower rail 2 is set to be slidable between the pair of opposed inner side walls 15.

  As shown in FIG. 3, the inner wall 15 of the lower rail 2 is positioned on both sides of the inner wall central part 15 a and the inner wall central part 15 a which is a central part in the longitudinal direction of the lower rail, compared to the inner wall central part 15 a. And an inner wall end portion 15b protruding to the bottom wall 11 side (downward). A plurality of lock grooves 17 formed in a comb-like shape as slits are formed at the lower edge of the inner wall central portion 15a. Further, a step 18 that is orthogonal to the bottom wall 11 is formed at a portion where the inner wall end 15b and the inner wall central portion 15a are continuous. Two steps 18 are provided on each inner side wall 15 of the lower rail 2 along the longitudinal direction of the lower rail, and four steps are provided on one lower rail 2. In addition, the lower rail 2 is left-right symmetric, and the formation position of the level | step difference 18 in the lower rail longitudinal direction is the same position in a pair of inner wall 15 which opposes.

  As shown in FIGS. 1 and 2, the upper rail 3 has a top wall 21 fixed on the back side of a seat seat portion (not shown) and a pair of side walls 22 on both sides of the top wall 21, and a lower portion is opened. It has an upper rail body portion 23 having a U-shaped cross section and a bent wall 24 that bends and extends outward from the tip of each side wall 22. The bent wall 24 enters between the outer wall 12 and the inner wall 15 of the lower rail when the upper rail 3 is assembled to the lower rail 2.

  In the upper rail 3, at a predetermined position in the longitudinal direction of the upper rail, as shown in FIGS. 1 and 4, three engagement long holes 25 and two auxiliary holes 26 along the vertical direction are formed side by side. . The three engagement long holes 25 are located between the two auxiliary holes 26 in the upper rail longitudinal direction. The engagement long hole 25 and the auxiliary hole 26 are formed across the side wall 22 and the bent wall 24.

  The auxiliary hole 26 has an L-shape, and has a vertical hole portion 26a parallel to the engagement elongated hole 25 and a horizontal hole portion 26b along the longitudinal direction of the upper rail 3, and is adjacent through the horizontal hole portion 26b. It communicates with the lower end of the long hole 25.

  The vertical hole portion 26 a of the auxiliary hole 26 is set so as to have a shorter length along the vertical direction and a shorter width along the upper rail longitudinal direction than the engagement elongated hole 25. Further, compared to the distance between the three engagement long holes 25 along the longitudinal direction of the upper rail, the distance between the longitudinal hole portion 26a of the auxiliary hole 26 and the engagement long hole 25 adjacent to the vertical hole portion 26a along the longitudinal direction of the upper rail. Is set to be wide.

  Here, the engagement elongated hole 25 and the auxiliary hole 26 are cut in advance by machining such as pressing before assembling the upper rail 3 to the lower rail 2.

  A portion sandwiched between the auxiliary hole 26 of the side wall 22 and the inner engagement long hole 25 adjacent to the auxiliary hole 26 is bent outward to form a stopper piece 27. The stopper piece 27 is previously cut and raised from the side wall 22 before the upper rail 3 is assembled to the lower rail 2.

  When the upper rail 3 is assembled to the lower rail 2, the stopper piece 27 does not engage with the step 18 of the lower rail 2, and the upper rail 3 is assembled to a predetermined position after the upper rail 3 is assembled at a predetermined position. It is formed so as to protrude to the lateral outer side of the side wall 22 with a dimension setting so as to engage with the step 18 of the lower rail 2 when it slides more than a predetermined amount. Two stopper pieces 27 are provided on each side wall 22 of the upper rail 3 along the upper rail longitudinal direction, and four stopper pieces 27 are provided on one upper rail 3. In addition, the upper rail 3 is left-right symmetric, and the formation position of the stopper piece 27 in the upper rail longitudinal direction is the same position on the pair of opposing side walls 22.

  The sliding movement of the upper rail 3 toward the front side (left side in FIG. 3) with respect to the lower rail 2 is that the step 18 on the vehicle front side of the lower rail 2 hits the stopper piece 27 on the vehicle front side of the upper rail 3 and the both engage with each other. Regulated by.

  In the sliding movement of the upper rail 3 to the rear side (right side in FIG. 3) with respect to the lower rail 2, the stopper piece 27 on the vehicle rear side of the upper rail 3 hits the step 18 on the vehicle rear side of the lower rail 2, and both engage with each other. Regulated by.

  The friction reducing member 4 is generally composed of four metal spherical guide balls 31 and a metal retainer 32 that rotatably supports the four guide balls 31. In the present embodiment, the two lower guide balls 31a located on the lower side are set to have a larger diameter than the two upper guide balls 31b located on the upper side. The lower guide ball 31 a supports the lower surface of the bent wall 24 of the upper rail 3. The upper guide ball 31 b supports the upper surface of the bent wall 24 of the upper rail 3.

  The friction reducing member 4 is disposed at two locations along the longitudinal direction of the lower rail in the housing portion 28 surrounded by the outer wall 12, the upper wall 14, and the inner wall 15 of the lower rail 2, and is formed in one assembly described above. On the other hand, it is arranged at four places.

  The lock mechanism 5 uses a plurality of lock grooves 17 formed in the inner wall central portion 15 a of the lower rail 2, one end being fixed to the top rail 21 of the upper rail and the other end between the side walls 22 of the upper rail 3. A long and slender lock member 41 that can swing up and down, a metal operation lever 42 that swings the lock member 41, a lever spring 43 that biases and holds the operation lever 42, and a fulcrum when the operation lever 42 is operated. And a metal support member 44 constituting the structure.

  The lock member 41 is formed by bending an elongated plate made of a metal material into a step shape. The lock member 41 is fixed to a lock member fixing hole 46 formed in the top wall 21 of the upper rail 3 through a lock pin (not shown) inserted into a through hole 45 formed at one end thereof. At the other end of the lock member 41, a plurality of engagement protrusions 47 that can be engaged with the lock groove 17 are formed. The engagement protrusion 47 can also engage with an engagement long hole 25 formed in the side wall 22 of the upper rail 3. That is, the engagement protrusion 47 can be simultaneously released from the lock groove 17 and the engagement long hole 25 by the other end of the lock member 41 swinging. The lock member 41 functions as a so-called leaf spring in a state of being fixed to the upper rail 3.

  The operation lever 42 has one end connected to the lever operation portion 48 along the sheet width direction, both ends of the lever operation portion 48, the lever vertical side portion 49 along the vertical direction, and the other end of each lever vertical side portion 49. And a lever lateral side portion 50 along the front-rear direction of the seat, and is formed in a U shape as a whole. The other side of each of the pair of lever lateral sides 50 is inserted into the upper rail 3. Further, the other end of the lever lateral side portion 50 passes through an insertion hole 51 formed in the lock member 41 from below to above.

  The lever spring 43 is a left-right symmetrical member obtained by bending a metal wire, and has a protrusion 53 that engages with a lever spring fixing hole 52 formed in the side wall 22 of the upper rail 3 at one end.

  The support member 44 includes a lever fulcrum portion 54 having an arcuate cross section that serves as a fulcrum when the operation lever 42 is operated, and a plurality of protrusions 56 that engage with the support member fixing holes 55 formed in the side wall 22 of the upper rail 3. And is fixed between the side walls 22 of the upper rail 3. The support member 44 is disposed between the lock member 41 and the lever lateral side portion 50 on one end side of the lock member 41 with respect to the insertion hole 51.

  In the lock mechanism 5 described above, when the lever operation portion 48 of the operation lever 42 is pulled upward from the initial position, the operation lever 42 rotates around the lever fulcrum portion 54 of the support member 44 and the tip of the lever lateral side portion 50 is locked. The other end of the member 41 is pushed down, and the engagement protrusion 47 is simultaneously detached from the lock groove 17 of the lower rail 2 and the engagement long hole 25 of the upper rail 3. That is, by pulling up the lever operation portion 48 of the operation lever 42 from the initial position, the upper rail 3 is brought into an unlocked state in which the upper rail 3 can slide on the lower rail 2.

  In the seat slide device 1 of this embodiment, as shown in FIGS. 2 and 3, the stopper piece 27 bent outward from the side wall 22 of the upper rail 3 may abut against the step 18 of the lower rail 2. It is possible.

  That is, the seat slide device 1 of the present embodiment can restrict the sliding movement of the upper rail 3 with respect to the lower rail 2 without providing a stopper piece that engages with the upper rail 3 on the bottom wall 11 of the lower rail 2. Even if foreign matter enters between the upper rail 3 and the upper rail 3, it can be easily discharged from the front end or the rear end, which is the longitudinal end of the lower rail 2. Moreover, since it is not necessary to set another member for discharging the foreign matter that has entered between the lower rail 2 and the upper rail 3, it is possible to prevent the cost from increasing due to an increase in the number of components.

  The stopper piece 27 and the step 18 for restricting the sliding movement of the upper rail 3 with respect to the lower rail 2 are formed in advance before the upper rail 3 is assembled to the lower rail 2. When the upper rail 3 is assembled to the lower rail 2, the upper rail 3 is 2, the lower rail 2 can be inserted from the front end side or the rear end side to a predetermined position, and then the upper rail can be translated and assembled upward. That is, since it is not necessary to perform the process of forming the stopper piece 27 and the step 18 in a state in which the upper rail 3 is assembled to the lower rail 2, it is possible to improve the assembling property of the upper rail 3 with respect to the lower rail 2 and to be assembled. It is possible to stabilize the cross-sectional shapes of the lower rail 2 and the upper rail 3 in the above state.

  The present invention can also be applied to a seat slide device having a lock mechanism for fixing the upper rail 3 to a desired position of the lower rail 2 by a mechanism different from the lock mechanism 5 of the above-described embodiment.

  For example, when the seat slide device has a lock mechanism in which a protrusion engaged with the lower rail 2 and the upper rail 3 is drawn into the upper rail 3 when the lever operation portion 48 of the operation lever 42 is operated. A slit formed in the inner wall central portion 15a of the lower rail 2 can be formed as a lock hole 61 as shown in FIG.

DESCRIPTION OF SYMBOLS 1 ... Seat slide apparatus 2 ... Lower rail 3 ... Upper rail 5 ... Lock mechanism 11 ... Bottom wall 12 ... Outer wall 13 ... Lower rail main-body part 14 ... Upper wall 15 ... Inner side wall 15a ... Inner side wall center part 15b ... Inner side wall edge part 17 ... Lock groove 18 ... Step 21 ... Top wall 22 ... Side wall 23 ... Upper rail main body 24 ... Bending wall 25 ... Elongation slot 26 ... Auxiliary hole 27 ... Stopper piece

Claims (2)

A vehicle seat slide device that includes a lower rail and an upper rail that is slidably mounted on the lower rail, and is capable of adjusting the position of the seat attached to the upper rail along the vehicle longitudinal direction.
The lower rail includes a bottom wall fixed to the floor of the vehicle and a pair of outer walls, and has a U-shaped lower rail main body opening at the top, and extends inwardly from the tip of each outer wall. An upper wall that extends, and an inner wall that extends from the tip of the upper wall toward the bottom wall,
The upper rail has an upper rail body portion having a U-shaped cross section having a top wall and a pair of side walls and having an opening at a lower portion, and an outer wall and an inner wall of the lower rail that are bent and extended outward from the tip of each side wall. In a vehicle seat slide device having a bent wall that enters between,
The inner wall of the lower rail is positioned on both sides of the central portion of the inner wall in the longitudinal direction of the lower rail and on the both sides of the central portion of the inner wall in the longitudinal direction of the lower rail, and closer to the bottom wall side than the central portion of the inner wall. A projecting inner wall end, and a step is formed at a portion where the inner wall end and the inner wall central portion are continuous,
The vehicle seat slide device according to claim 1, wherein the upper rail includes a stopper piece that is cut and raised outward from the side wall and engageable with the step. A lock mechanism for fixing the upper rail to the lower rail;
2. The vehicle seat slide according to claim 1, wherein slits engageable with the lock mechanism are formed in the central portion of the inner wall of the lower rail so as to be arranged at a predetermined interval in a longitudinal direction of the lower rail. apparatus.

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