JP2008024110A - Seat slide device for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a rear part of an upper rail from being pulled upward and peeled from a lower rail by shock load acting on a rear part of a seat cushion via a seat belt. <P>SOLUTION: This seat slide device is provided with the lower rail constituted of a bottom face part, a pair of side wall parts and a downward bending part bent and extended from the side wall parts and having an opened upper part, the upper rail 2 constituted of a ceiling part, a pair of side wall parts, and an upward bending part bent and extended from the side wall parts and entering between the side wall parts and the downward bending part of the lower rail and having an opened lower part, and a pair of mounting bolts 15 for connecting the seat in a rear part of the upper rail 2. In the upper rail 2, a reinforcing member 17 is provided. The reinforcing member 17 is provided with a space holding part 17a located on lower sides of a pair of bolts 15 to hold a space of the pair of side wall parts of the upper rail 2, a mounting part 17b mounted in the ceiling part of the upper rail 2, and a deformation preventing part 17c for preventing displacement of the space holding part 17a. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention provides a case where a belt anchor for connecting a folded portion, which is an intermediate portion of a seat belt, to a vehicle body via a buckle is attached to the rear portion of the seat cushion, and a large impact load is applied to the rear portion of the seat cushion via the seat belt. Relates to an automotive seat slide device in which the rear portion of the seat cushion is pulled obliquely upward in front of the vehicle body by the seat belt, and the strength of the automotive seat slide device is improved by reinforcing the upper rail to which the seat cushion is attached. is there.

  The vehicle is provided with a seat belt for the safety of passengers. The seat belt employs a three-point support structure in which the seat belt is coupled to the vehicle body or the seat at three positions. That is, it is as follows. One end of the seat belt is coupled to the vehicle body at the center pillar position in the vicinity of the shoulder opening on one side surface of the seat so as to be extended, and the other end is coupled to the vehicle body floor surface on one side surface via a bolt. The intermediate portion of the seat belt is coupled to the rear portion of the seat cushion on the other side surface of the seat. That is, the tip of the anchor plate inserted so that the middle part of the seat belt is folded back is detachably coupled to a buckle coupled to the rear part of the seat cushion via the belt anchor. In addition, one end of the seat belt that is coupled so as to be able to extend near the shoulder opening on one side surface of the seat may be coupled to the upper portion of the seat back instead of the pillar position of the vehicle body, and the other end of the seat belt may be Instead of the vehicle body floor on one side, it may be coupled to the rear portion of the seat cushion via a bolt.

  When the vehicle has a front collision accident, the weight of the occupant acts toward the front of the vehicle body due to the inertial force, and the rear portion of the seat cushion is pulled obliquely upward at the front of the vehicle body via the seat belt and the belt anchor. . Thus, since the rear portion of the seat cushion is pulled upward, a large force acts so as to peel the rear portion of the upper rail upward from the rear portion of the lower rail. When two points at both ends of the seat belt are the center pillar position of the vehicle body and the vehicle body floor surface and are directly connected to the vehicle body, only one of the three points (the middle part of the seat belt) is on the seat. If one end of the seat belt is connected to the upper part of the seat back or the other end of the seat belt is connected to the rear part of the seat cushion instead of the vehicle body floor, Two of the points are connected to the seat, one end of the seat belt is connected to the upper part of the seat back, and the other end of the seat belt is connected to the rear part of the seat cushion instead of the vehicle body floor. In this case, all three points are connected to the sheet, and the force applied in the direction of peeling off the rear part of the upper rail increases stepwise as the number of parts connected to the sheet increases.

Patent Document 1 discloses an invention that prevents the rear portion of the upper rail from being peeled upward from the rear portion of the lower rail. In this invention, in order to restrict the range of movement when the upper rail moves back and forth with respect to the lower rail, a pair of pins are provided at the front and rear positions of the lower rail, while a stopper plate is provided inside the rear portion of the upper rail. The range of movement of the stopper plate wall is regulated by a pair of pins, and the presence of the stopper plate wall prevents the pair of side walls of the upper rail from bending inwardly, thereby The bending of the direction bending portion is prevented from returning, and the rear portion of the upper rail is reinforced so as not to be peeled upward with respect to the lower rail.
JP 2005-67218 A

  However, since the wall portion of the stopper plate exists only in a short range in the length direction of the upper rail, it is not sufficient to prevent the side wall portion of the upper rail from being bent inward. The side wall of the upper rail is bent inward, and the bending of the upward bent portions on both sides of the upper rail is returned, so that the rear portion of the upper rail may be peeled off from the lower rail.

  According to a first aspect of the present invention, there is provided a seat slide device for an automobile, wherein a lower rail disposed along a vehicle body longitudinal direction is coupled to a vehicle floor, and an upper rail is assembled to the lower rail. The lower rail includes a bottom surface portion and a pair of side wall portions. The upper rail is formed from a ceiling portion and a pair of side wall portions. An upward bent portion that extends between the side wall portion and the downward bent portion of the lower rail by bending and extending the lower end portion of the side wall portion outwardly in a substantially U-shaped basic cross-section having an open lower portion. A seat is coupled to the upper surface of the ceiling portion of the upper rail via at least a pair of mounting bolts that are formed and arranged at the rear portion of the upper rail, and a seat belt is provided on the seat. In the automotive seat slide device, a reinforcing member is provided inside the upper rail, and the reinforcing member is attached via a coupling means between the pair of mounting bolts on the ceiling portion of the upper rail, and A pair of space holding portions that are respectively disposed along the length direction of the upper rail and are respectively disposed below the pair of bolts and hold a space between the pair of side wall portions of the upper rail, and each of the pair of space holding portions. It has the connection part which connects the one end and the said attachment part, It is characterized by the above-mentioned.

  According to this invention, when the vehicle collides and the weight of the occupant acts toward the front of the vehicle body due to the inertial force and an impact load is generated, the rear portion of the seat cushion is obliquely above the front of the vehicle body via the seat belt. Therefore, the force which pulls a pair of attachment bolt 15 upwards acts. At this time, since the left and right downward bent portions of the lower rail engage with the left and right upward bent portions of the upper rail, the lower portions of the left and right side wall portions of the upper rail approach each other and bend inward, and the upper rail The bending of the left and right upward bent portions is returned, and the lower bent portion and the upward bent portion are disengaged from each other in this order. However, since a space holding portion for holding the space between the pair of side walls of the upper rail is interposed along the length direction of the upper rail below the pair of mounting bolts pulled upward, the pair of side walls It is prevented that the lower part of a part is bent in the direction which approaches mutually. Therefore, disengagement between the left and right downward bent portions of the lower rail and the left and right upward bent portions of the upper rail is prevented.

  The configuration of the vehicle seat slide device according to claim 2 is the vehicle seat slide device according to claim 1, wherein the other end of each of the pair of interval holding portions is connected to the other end of the interval holding portion. It is characterized in that a deformation preventing portion is provided that prevents displacement of the upper rail toward the ceiling portion, and prevents deformation of the upper rail due to the displacement.

  According to the present invention, since the deformation preventing portion is provided on the side opposite to the attachment portion of the interval holding portion, when the lower portions of the left and right side wall portions of the upper rail try to deform in a direction approaching each other, the respective interval holding is maintained. The end of the part on the side opposite to the mounting part tends to be displaced toward the ceiling of the upper rail due to the approach of the left and right side walls of the upper rail. Displacement toward the part is prevented.

  According to the vehicle seat slide device of the first aspect, the reinforcing member provided inside the upper rail is provided below the pair of bolts for connecting the rear portion of the seat cushion to the upper rail, along the length direction of the upper rail. Since a pair of space holding portions for holding the space between the left and right side wall portions of the upper rail are provided, the lower portions of the left and right side wall portions of the upper rail are prevented from approaching each other, thereby The bending is prevented from returning, and further, the downward bending portion and the upward bending portion are disengaged from each other, and the rear portion of the upper rail is prevented from being peeled off from the lower rail. Therefore, when the seat belt is provided on the seat and the weight of the occupant acts toward the front of the vehicle body due to the inertial force at the time of the vehicle collision, the rear portion of the seat cushion is pulled obliquely upward at the front of the vehicle body via the seat belt, and the rear portion of the upper rail Although an impact load acts in the direction of peeling the upper part upward, the amount of deformation of the upper rail in such a case can be reduced to improve the strength of the upper rail.

  According to the vehicle seat slide device of the second aspect, the deformation preventing portion is provided on the side opposite to the attachment portion of the interval holding portion, and the attachment portion to which the pair of interval holding portions are connected is attached to the ceiling portion of the upper rail. Displacement on both sides of the interval holding portion is prevented as a result because displacement of the interval holding portion on the mounting portion side is prevented only by fixing. Moreover, since only the mounting portion is fixed, the assembling work of the reinforcing member is easy.

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

  1 to 2 are drawings showing a main part of an upper rail provided with a reinforcing member, FIG. 3 is an exploded perspective view of a seat slide device, FIGS. 4A and 4B are a plan view, a front view, and FIG. Is a perspective view of the reinforcing member, and FIGS. 6 to 7 are sectional views of the seat slide device.

  As shown in FIG. 3, the seat slide device includes a lower rail 1 fixedly installed on a vehicle floor panel and an upper rail 2 to which lower portions on both sides of the seat are attached. The lower rail 1 and the upper rail 2 are held by a retainer 3. The roller 4 and the guide ball 5 as rolling means are assembled so as to be slidable in the length direction.

  Specifically, the lower rail 1 has a bottom portion 1a and a pair of side wall portions 1b. The lower rail 1 has a substantially U-shaped basic cross-section with an open top, and the upper end portion of the side wall portion 1b is bent and extended inward. Bending portions 1c are respectively formed, and the upper rail 2 is formed by bending and extending the lower end portion of the side wall portion 2b outwardly to a substantially U-shaped basic cross-sectional portion having a ceiling portion 2a and a pair of side wall portions 2b and having an open lower portion. Thus, an upward bent portion 2c that enters between the side wall portion 1b of the lower rail 1 and the downward bent portion 1c is formed. The retainer 3 is assembled in a free state between the lower rail 1 and the upper rail 2, the roller 4 held by the retainer 3 supports the lower surface of the upward bent portion 2 c of the upper rail 2, and the guide ball 5 is on the upper rail 2. The side surface of the direction bending part 2c is guided.

  A lock mechanism 6 for sliding and locking the upper rail 2 is disposed in the cross section between the lower rail 1 and the upper rail 2 incorporated in this way. The locking mechanism 6 includes a substantially “U” -shaped latch lever 8 having a plurality of locking claws 7 rotatably supported on the upper rail 2 side through shaft portions 19 and 20 substantially parallel to the upper rail 2, and A lock plate 10 having a plurality of fitting holes 9 that can be engaged with and disengaged from the lock claw 7 of the latch lever 8 and a bar-like spring that urges the latch lever 8 in a direction in which the lock claw 7 engages with the fitting hole 9. 11 and a claw support plate 12 that engages and supports the base portion of the lock claw 7 on the front side of the lock plate 10 when locked.

  The claw support plate 12 includes a pair of attachment bases 12a and 12b that are provided apart from each other in the length direction, and a vertical part 12c that is provided so as to connect the attachment bases 12a and 12b. , 12b are attached to the lower surface of the ceiling portion 2a of the upper rail 2 via a rivet 13, and the vertical portion 12c is arranged in a state of being close to one side wall portion 2b of the upper rail 2. The vertical portion 12 c extends along the length direction of the upper rail 2, and a plurality of support holes 14 are formed in the vicinity of the lower end of the vertical portion 12 c for inserting and engaging the lock claw 7 of the latch lever 8.

  The latch lever 8 is formed in a substantially “U” shape as described above, and the arm portions near both ends of the “U” shape are connected to the ceiling portion of the upper rail 2 via a pair of support brackets 16 and 21. 2a is rotatably supported. An input arm 18 is integrally extended on one side of the arm portion, and the latch lever 8 can be operated from the outside of the upper rail 2 via the input arm 18. The support brackets 16 and 21 are fixed to the ceiling portion 2 a of the upper rail 2 together with the claw support plate 12 via rivets 13. Shaft portions 19 and 20 project from the brackets 16 and 21 by embossing, and the latch lever 8 is rotatably supported via the shaft portions 19 and 20.

  Both ends of the rod-shaped spring 11 are supported and fixed to the ceiling portion 2a of the upper rail 2, and the central portion of the curved rod-shaped spring 11 urges the latch lever 8, whereby the tip of the lock claw 7 is moved to the upper rail 2. It is urged | biased toward the one side wall part 2b side.

  The lock plate 10 has a substantially L-shaped cross section and is formed so as to extend over a predetermined range in the length direction of the lower rail 1. The horizontal portion 10a of the lock plate 10 is coupled to the substantially central portion in the width direction of the bottom surface portion 1a of the lower rail 1 by spot welding or projection welding. The vertical portion 10b of the lock plate 10 is formed with the plurality of fitting holes 9 extending in the length direction. The vertical portion 10b includes one side wall portion 2b of the upper rail 2 and the claw support plate 12. It is arrange | positioned between the vertical parts 12c. Since the locking claw 7 of the latch lever 8 is inserted and fitted into the fitting hole 9 formed in the vertical portion 10b, the pitch between the adjacent fitting holes 9, 9 is set to be the same as the pitch of the locking claw 7. ing.

  As shown in FIGS. 6 and 7, one side wall portion 2 b of the upper rail 2 is recessed in a direction facing the vertical portion 10 b of the lock plate 10 at a position facing the support hole 14 of the claw support plate 12. A recess 25 is provided, and a support hole 26 is formed in the recess 25 so as to correspond to the support hole 14. The support hole 26 is a portion into which the tip of the lock claw 7 is inserted and engaged when locked, and constitutes a second claw support portion that supports the lock claw 7 together with the support hole 14 of the claw support plate 12. Yes.

  A notch 27 is formed over the ceiling portion 2 a at approximately the center in the axial direction of one side wall portion 2 b of the upper rail 2, and the input arm 18 protrudes outside the upper rail 2 through the notch 27. And the lock release mechanism 30 which presses the projecting input arm 18 and releases the lock is provided.

  The configuration of the lock release mechanism 30 will be described. As shown in FIG. 3, a holder 29 is disposed above the upper rail 2. The holder 29 is pivotally supported via a bolt (not shown) inserted through the hole 29b. A return spring (not shown) is provided to return the holder 29 in the counterclockwise direction.

  The seat slide device configured as described above is similarly installed on the opposite side of the seat in the left-right direction of the vehicle body, and holders 29 in the left and right seat slide devices are connected via a substantially U-shaped loop handle 28. The left and right holders 29 are operated in synchronization with each other. That is, both end portions of the loop handle 28 are inserted into the mounting holes 29 d and 29 c of the holder 29 and coupled. For this reason, when the vehicle body front side, which is an intermediate portion of the substantially U-shaped loop handle 28, is pulled up, the holder 29 rotates via a bolt (not shown), and the operation portion 29a located at the rear end of the holder 29 The input arm 18 is pushed downward. Thereafter, when the hand is released from the loop handle 28, the loop handle 28 returns to its original state by a return spring (not shown).

  A pair of mounting bolts 15 for coupling a seat (not shown) to the upper rail 2 are disposed in the vicinity of the rear portion of the upper rail 2, and the two mounting bolts 15 are separated from each other at the front portion of the upper rail 2. All of them penetrate through the ceiling 2a of the upper rail 2. A seat (not shown) is coupled to the upper rail 2 via these mounting bolts 15.

  A reinforcing member 17 is provided inside the upper rail 2 on the vehicle body rear side of the upper rail 2. The shape of the reinforcing member 17 is shown in FIGS. That is, the reinforcing member 17 is disposed between the pair of bolts 15 and the pair of bolts 15 and the pair of bolts 15 that are positioned below the pair of bolts 15 and hold the gap between the pair of side walls of the upper rail 2. An attachment portion 17b attached to the ceiling portion 2a, and a deformation preventing portion 17c that prevents the distance holding portion 17a from being displaced toward the ceiling portion 2a and prevents deformation of the upper rail 2 due to the displacement, A connecting portion 17e that connects the spacing holding portion 17a and the mounting portion 17b is provided. And the part of the attaching part 17b is couple | bonded with the ceiling part 2a of the upper rail 2 via the spot welding as a coupling means.

  The interval holding part 17a and the attaching part 17b are arranged substantially parallel to the horizontal plane along the length direction of the upper rail 2, and the width dimension of the attaching part 17b is smaller than the width dimension of the interval holding part 17a. As can be seen from FIG. 2 and FIG. 5, the portion where the ceiling portion 2a and the side wall portion 2b of the upper rail 2 are connected is bent in an arc shape, and the width between the interval holding portion 17a and the mounting portion 17b. Since interference occurs when the dimensions are the same, an escape portion is formed. A gripping hole 17d is formed in each interval holding portion 17a. This is because when the reinforcing member 17 is carried to the ceiling portion 2a inside the upper rail 2 and spot welding is performed, the reinforcing member 17 can be conveyed by the robot so that the robot finger can be inserted into the gripping hole 17d for reinforcement. The member 17 is provided so that it can be gripped. As shown in FIG. 1, a gap G of about 1 mm is formed between the upper end of the deformation preventing portion 17 c and the head portion 15 a of the bolt 15. The gap G is provided when a current flows between the upper end of the deformation prevention portion 17c and the head portion 15a of the bolt 15 during spot welding of the reinforcing member 17, and the ceiling portion 2a and the attachment portion 17b of the upper rail 2 are provided. Since the current flowing between the upper end of the deformation preventing portion 17c and the head 15a of the bolt 15 is prevented from flowing, the spot welding is performed stably. It is. Note that the welding of the attachment portion 17b to the ceiling portion 2a of the upper rail 2 may employ projection welding instead of spot welding. And the structure in the case of employ | adopting projection welding is the same as that of the case where spot welding is employ | adopted.

  In addition, two pairs of cut-and-raised portions 1 d are formed at both ends of the lower rail 1 so that the roller 4 and the guide ball 5 do not fall out of the lower rail 1. Further, the foremost position and the rearmost position of the upper rail 2 are regulated in a state where the retainer 3 is sandwiched between two pairs of cut-and-raised portions 2d formed in the upward bent portions 2c at both ends of the upper rail 2. Thus, in order to restrict the movement range of the upper rail 2 with respect to the lower rail 1, two pairs of cut-and-raised portions 1e are formed in the center of the lower rail 1.

  Next, the operation of the seat slide device will be described.

  In the seat slide device, when the seat is locked at an arbitrary slide position, the latch lever 8 is rotationally displaced toward the lock plate 10 under the urging force of the bar spring 11 as shown in FIG. At this time, the lock claw 7 of the latch lever 8 is engaged with the support hole 14 of the claw support plate 12, the fitting hole 9 of the lock plate 10, and the support hole 26 of the upper rail 2.

  When the seat slide position is changed to another position from this state, the holder 29 is rotated clockwise about the hole 29b in FIG. 3 when the intermediate portion of the loop handle 28 is pulled upward. Then, the operation unit 29a presses the input lever 18 downward. Then, the latch lever 8 is rotationally displaced against the urging force of the rod-shaped spring 11 as shown in FIG. 7, whereby the lock claw 7 of the latch lever 8 moves between the support hole 26, the fitting hole 9, and the support hole 14. It is pulled out from the three parties and unlocked, allowing the seat to slide freely. In this state, the sliding position of the upper rail 2 together with the seat is changed to an arbitrary position to change the position of the upper rail 2 with respect to the lower rail 1, and then the lifting of the front portion of the loop handle 28 is released, so that the latch lever 8 is attached to the bar spring 11. It is restored to its original position by the force, and the lock claw 7 is engaged again across the three of the support hole 14, the fitting hole 9, and the support hole 26, and becomes locked.

  According to the present invention, when the vehicle collides and the weight of the occupant acts toward the front of the vehicle body due to the inertial force and an impact load is generated, the rear portion of the seat cushion is inclined obliquely upward in front of the vehicle body via the seat belt. Therefore, a force is applied to pull the pair of mounting bolts 15 upward. At this time, since the left and right downward bent portions 1c of the lower rail 1 and the left and right upward bent portions 2c of the upper rail 2 are engaged, the lower portions of the left and right side wall portions 2b of the upper rail 2 approach each other and are The left and right upward bent portions 2c of the upper rail 2 are bent back, and the lower bent portion 1c and the upward bent portion 2c are disengaged from each other in this order. However, below the pair of mounting bolts 15 lifted upward, a spacing holding portion 17a for holding the spacing between the pair of side wall portions 2b of the upper rail 2 is interposed horizontally along the length direction of the upper rail 2. As a result, the lower portions of the pair of side wall portions 2b are prevented from being bent toward each other. Accordingly, it is possible to reduce the amount of deformation of the left and right downward bent portions 1c of the lower rail 1 and the left and right upward bent portions 2c of the upper rail 2, and to improve the strength against peeling of the upper rail 2 from the lower rail 1. Can do.

  According to the present invention, since the deformation preventing portion 17c is provided on the side of the spacing holding portion 17a opposite to the mounting portion 17b, when the lower portions of the left and right side wall portions 2b of the upper rail 2 are to be deformed toward each other, The end of each spacing holding portion 17a on the side opposite to the mounting portion 17b tends to be displaced toward the ceiling portion 2a of the upper rail 2 due to the approach of the left and right side wall portions 2b of the upper rail 2, but due to the presence of the deformation preventing portion 17c. Further, it is possible to prevent the side of the spacing holding portion 17a opposite to the mounting portion 17b from being displaced toward the ceiling portion 2a of the upper rail 2.

  In addition, although the case where the spot welding was used as a coupling means for coupling the reinforcing member to the upper rail was shown, a bolt or a rivet that can be automatically assembled may be used as the coupling means.

Sectional drawing which shows the principal part of the upper rail to which the reinforcement member was attached (embodiment). AA arrow line view of FIG. 1 (embodiment). 1 is an exploded perspective view of a seat slide device (embodiment). It relates to a reinforcing member, (a) is a plan view, (b) is a front view (embodiment). The perspective view of a reinforcement member (embodiment). Sectional drawing which shows the locked state of a seat slide apparatus (embodiment). Sectional drawing which shows the lock release state of a seat slide apparatus (embodiment).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Lower rail 1a ... Bottom surface part 1b ... Side wall part 1c ... Downward bending part 2 ... Upper rail 2a ... Ceiling part 2b ... Side wall part 2c ... Upward bending part 15 ... Mounting bolt 17 ... Reinforcement member 17a ... Spacing holding part 17b ... Installation Part 17c ... Deformation prevention part 17e ... Connection part

Claims (2)

A lower rail arranged along the longitudinal direction of the vehicle body is coupled to a vehicle floor, and an upper rail is assembled to the lower rail. The lower rail is composed of a bottom surface portion and a pair of side wall portions, and has a substantially U-shaped basic cross section with an upper opening. The upper rail is formed by bending and extending the upper end of the side wall inwardly to form a downward bent portion, and the upper rail is composed of a ceiling portion and a pair of side wall portions. And at least a pair of upward bent portions formed between the side wall portion and the downward bent portion of the lower rail by bending and extending the lower end portion of the side wall portion outward, respectively, and disposed at the rear portion of the upper rail. In the automobile seat slide device in which a seat is coupled to the upper surface of the ceiling portion of the upper rail via a mounting bolt, and a seat belt is provided on the seat.
A reinforcing member is provided inside the upper rail, and the reinforcing member is attached to a mounting portion attached via a coupling means between the pair of mounting bolts on the ceiling portion of the upper rail, and below each of the pair of bolts A pair of interval holding portions that are arranged along the length direction of the upper rail and hold the interval between the pair of side wall portions of the upper rail, one end of each of the pair of interval holding portions, and the mounting portion. An automobile seat slide device comprising: a connecting portion to be connected. The vehicle seat slide device according to claim 1,
The other end of each of the pair of interval holding portions prevents the other end of the interval holding portion from being displaced toward the ceiling portion of the upper rail, and the displacement allows the deformation of the upper rail. An automotive seat slide device comprising a deformation preventing portion for blocking.

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