JP2008074266A - Vehicular seat slide device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular seat slide device capable of commonizing a plurality of lock members as a same part and suppressing increase of an occupying space of the plurality of lock members in a longitudinal direction of a rail. <P>SOLUTION: A lower rail 3 is fixed to a vehicle floor and has fold-back wall parts 13 at both sides in a width direction respectively. An upper rail 4 is fixed to a seat and is relatively moved to the lower rail 3. A plurality of lock holes 13a, 13b provided on both fold-back wall parts 13 in parallel along a longitudinal direction of the lower rail 3 respectively and a pair of lock levers 26 of the mutually same shape turnably provided on the upper rail 4 around a rotation axis O along a longitudinal direction of the upper rail 4 are provided. The pair of lock levers 26 is arranged so as to be superposed in the longitudinal direction of the upper rail 4 and has a lock claw 26c detachable from the lock holes 13a, 13b accompanying with turning around the rotation axis O respectively. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle seat slide device.

Conventionally, a vehicle seat slide device includes a lower rail fixed to a vehicle floor, an upper rail fixed to a seat and movable relative to the lower rail, and an appropriate lock member that fixes the upper rail to the lower rail and restricts the relative movement thereof. (For example, Patent Documents 1 and 2).
JP-A-10-181398 JP 2002-87118 A

  By the way, in such a vehicle seat slide device, in order to reduce the pitch of the fixing position of the upper rail with respect to the lower rail or to increase the fixing force, a plurality of locking members are generally provided. In this case, when the shapes of the plurality of lock members are different, it is necessary to manufacture each lock member for each shape, and the manufacturing cost is inevitably increased.

  Further, for example, as in Patent Document 1, when a plurality of lock members are arranged in the longitudinal direction of the rail, the space occupied by these lock members in that direction increases, and the degree of design freedom is reduced. End up.

  An object of the present invention is to provide a vehicle seat slide device that can share a plurality of lock members as the same part and can suppress an increase in the space occupied by the plurality of lock members in the longitudinal direction of the rail. It is to provide.

  In order to solve the above problems, the invention according to claim 1 is a first rail fixed to one of a vehicle floor and a seat and having walls on both sides in the width direction, the vehicle floor and the seat. A second rail fixed to the other of the first rail and movable relative to the first rail, a plurality of lock holes provided in parallel on the both wall portions along the longitudinal direction of the first rail, A pair of locking members having the same shape and arranged rotatably around the rotation axis along the longitudinal direction of the second rail, the pair of locking members being arranged in the longitudinal direction of the second rail Each of which has a lock claw that is arranged in a direction and that can be inserted into and removed from the lock holes of the both wall portions as it rotates about the rotation axis, and at least one lock claw of the pair of lock members The lock hole By being inserted, the relative movement of the first and second rails are summarized as being regulated.

  According to a second aspect of the present invention, in the vehicle seat slide device according to the first aspect, each of the first and second rails has a U-shaped rail cross section whose opening sides face each other, and The rotating shaft of the lock member is arranged outside the rail cross section of the second rail.

  According to a third aspect of the present invention, in the vehicle seat slide device according to the first or second aspect, the pair of lock members insert the lock claws into the lock holes at the same time, and A gist is provided with a release member that restricts the relative movement of the second rail, and simultaneously transmits an operation force to remove the lock claw from the lock hole to the pair of lock members.

  According to a fourth aspect of the present invention, in the vehicle seat slide device according to any one of the first to third aspects, the pair of lock members are simultaneously attached to a side where the lock claw is inserted into the lock hole. The gist is that a single urging means is provided.

  In the first aspect of the invention, the pair of lock members have the same shape as each other, so that both the lock members can be used as the same part. In addition, since the pair of lock members are arranged in the longitudinal direction of the second rail, the space occupied by both the lock members in the direction can be reduced, and the degree of freedom in design can be improved. Can do.

  In a second aspect of the present invention, the rotation shafts of the pair of locking members are disposed outside the rail cross section of the second rail, so that the rotation axis does not interfere with the rail cross section of the second rail. Outside, it can be pivotably assembled to the second rail.

  In the invention according to claim 3, for example, the operation force for removing the lock claw from the lock hole is simultaneously transmitted to the pair of lock members by the single release member, for example, the release force provided individually. The number of parts can be reduced as compared with the case where each member is transmitted to each lock member.

  In the invention according to claim 4, the pair of lock members can be urged simultaneously by the single urging means toward the side where the lock claw is inserted into the lock hole, thereby reducing the number of parts. it can.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
FIG. 1 is a side view schematically showing a vehicle seat 1 mounted on a vehicle such as an automobile. As shown in the figure, a lower rail 3 as a first rail is fixed to the vehicle floor 2 in a manner extending in the vehicle front-rear direction, and an upper rail 4 as a second rail is attached to the lower rail 3. It is mounted so as to be movable relative to the lower rail 3.

  The lower rail 3 and the upper rail 4 are arranged in pairs in the width direction of the vehicle seat 1 (the direction orthogonal to the paper surface in FIG. 1), and are arranged on the left side toward the front of the vehicle here. Is shown. The upper rails 4 are fixed and supported by a seat 5 that forms a seating portion for the occupant. The relative movement of the lower rail 3 and the upper rail 4 is basically in a restricted state, and the vehicle seat 1 is provided with a release handle 6 for releasing the restricted state.

  Next, the vehicle seat slide device according to the present embodiment will be described with reference to FIGS. 2, 3 and 4 are an exploded perspective view, a side view and a plan view showing the vehicle seat slide device, respectively. FIG. 5 is a cross-sectional view taken along the line AA in FIG. As described above, the lower rail 3 and the upper rail 4 are arranged in pairs in the width direction of the vehicle seat 1. Therefore, the structure including the lower rail 3 and the upper rail 4 is provided in pairs in the width direction of the vehicle seat 1. In FIGS. 2 to 5, as a structure common to the structures disposed on each side, a structure disposed on the left side toward the front of the vehicle is shown as a representative.

  As shown in FIG. 5, the lower rail 3 has a pair of side wall portions 11 erected from both sides in the width direction and a bottom wall portion 12 that connects the side wall portions 11 to each other. Then, a folded wall portion 13 is continuously formed at the distal end (upper end) of each side wall portion 11 as a wall portion that is bent inward in the width direction and further folded back to the proximal end side of the side wall portion 11.

  On the other hand, the upper rail 4 has a pair of side wall portions 14 extending in the vertical direction between the folded wall portions 13 of the lower rail 3 and a lid wall portion 15 that connects the side wall portions 14 to each other. Then, at the front end (lower end) of each side wall portion 14, a folded wall portion 16 that is bent outward in the width direction and is folded back so as to be surrounded by the side wall portion 11 and the folded wall portion 13 is continuously formed. ing.

  That is, the lower rail 3 and the upper rail 4 have U-shaped rail cross sections whose opening sides face each other, and are prevented from coming off in the vertical direction mainly by engaging with the folded wall portions 13 and 16.

  The upper rail 4 engages with each of the folded wall portions 16 via the pair of upper and lower balls 17 and the side wall portion 11 facing each other. As a result, the upper rail 4 is supported so as to be slidable in the longitudinal direction (vehicle longitudinal direction) with respect to the lower rail 3 in such a manner that the ball 17 rolls between the upper rail 4 and the lower rail 3.

  A plurality of (18) square lock holes 13a and 13b arranged in parallel in the longitudinal direction are formed in the folded wall portions 13 on both sides in the width direction of the lower rail 3 (the right side and the left side in FIG. 5) with a predetermined interval. Is formed. These lock holes 13a and 13b are alternately arranged in the longitudinal direction of the lower rail 3 so that either one of the adjacent lock holes 13a and 13b faces the other lock hole 13a and 13b in the width direction. Has been.

  Further, a plurality of (three) insertion holes 14a and 14b arranged side by side in the longitudinal direction are formed on the side wall portions 14 on both sides in the width direction of the upper rail 4 (the right side and the left side in FIG. 5). Is formed. These insertion holes 14a and 14b are alternately arranged in the longitudinal direction of the upper rail 4 so that any one of the adjacent insertion holes 14a and 14b is opposed to the other insertion hole 14a and 14b in the width direction. Has been. The plurality of insertion holes 14 a and 14 b are arranged at positions that can be matched with a plurality (three) of lock holes 13 a and 13 b adjacent in the longitudinal direction of the lower rail 3.

  Further, a plurality of (three) insertion holes 16a and 16b arranged in parallel in the longitudinal direction are formed in the folded wall portions 16 on both sides in the width direction of the upper rail 4 (the right side and the left side in FIG. 5). It is formed with. The insertion holes 16a and 16b are alternately arranged in the longitudinal direction of the upper rail 4 so as to face the insertion holes 14a and 14b in the width direction. The plurality of insertion holes 16 a and 16 b are arranged at positions that can match a plurality (three) of lock holes 13 a and 13 b adjacent in the longitudinal direction of the lower rail 3.

A rectangular through hole 15a is formed in the lid wall portion 15 of the upper rail 4 in accordance with the position in the longitudinal direction in which the insertion holes 14a and 14b are formed.
As shown in FIG. 2, a support bracket 21 made of a plate material is fastened by a plurality of rivets 22 on the upper surface of the lid wall portion 15 of the upper rail 4. The support bracket 21 is formed with a through hole 21a that opens in accordance with the through hole 15a, and is erected from a peripheral portion on one side and the other side of the through hole 21a along the longitudinal direction of the upper rail 4. A pair of bearing pieces 21b is formed. Needless to say, these bearing pieces 21 b are arranged to face each other in the longitudinal direction of the upper rail 4. The support bracket 21 is formed with an extension piece 21c that is spaced apart from the side wall 11 on one side of the lower rail 3 and extends downward, and the extension piece 21c protrudes outward in the width direction. A hinge pin 23 is provided.

  The support bracket 21 has a pair of lock levers 26 having the same shape as each other via a lock lever pin 24 inserted between the bearing pieces 21b across the bearing pieces 21b. It is supported so that it can rotate. That is, each lock lever 26 has a long main body portion 26a having a length shorter than the distance between the bearing pieces 21b, and bends from both ends of the main body portion 26a toward the other lock lever 26. A pair of support pieces 26b. The lock levers 26 are arranged between the bearing pieces 21b in such a manner that the support pieces 26b on each side are overlapped, and the lock lever pin 24 is inserted into the bearing piece 21b together with the support pieces 26b. The support bracket 21 is rotatably supported. Therefore, both lock levers 26 are arranged in a manner that overlaps in the longitudinal direction of the upper rail 4. Needless to say, the rotation axis O (see FIG. 5) of these lock levers 26 is disposed on the outer side (upper side) of the rail section of the upper rail 4 and extends along the longitudinal direction of the upper rail 4.

  Each lock lever 26 is formed with a plurality of (three) lock claws 26c extending downward from the main body portion 26a and folded outwardly away from the other lock levers 26 at the predetermined interval. These lock claws 26c are introduced into the rail cross section of the upper rail 4 through the through holes 21a and 15a. The lock claws 26c of the lock lever 26 are disposed between adjacent lock claws 26c of the other lock levers 26 to be back-to-back, that is, at positions where they do not interfere with the lock claws 26c of the other lock levers 26. That is, the pair of lock levers 26 are arranged so that the lock claws 26 c are alternately arranged and overlap in the longitudinal direction of the upper rail 4.

  Each lock claw 26c of one lock lever 26 is arranged so as to be detachable with respect to one insertion hole 14a and insertion hole 16a along with the rotation around the rotation axis O, and the other lock lever 26. Each of the lock claws 26c is arranged so as to be detachable with respect to the other insertion hole 14b and the insertion hole 16b with the rotation about the rotation axis O.

  Here, each lock claw 26c of one lock lever 26 is inserted into the lock hole 13a together with the insertion hole 14a and the insertion hole 16a, and each lock claw 26c of the other lock lever 26 is inserted into the insertion hole 14b and the insertion hole. When it is inserted into the lock hole 13b together with 16b, the relative movement of the lower rail 3 and the upper rail 4 is restricted, and the seat 5 supported thereby is also positioned. At this time, one lock hole 13a is inserted between the insertion hole 14a into which the lock claw 26c is inserted and the insertion hole 16a, and the other lock hole 13b is inserted into the lock claw 26c. The lock claw 26c is inserted between the inserted through hole 14b and the inserted hole 16b to be firmly locked.

  Alternatively, each lock claw 26c of one lock lever 26 is sequentially removed from the one insertion hole 16a, the lock hole 13a, and the insertion hole 14a, and the lock claw 26c of the other lock lever 26 is removed from the other insertion hole 16b, By sequentially removing from the lock hole 13b and the insertion hole 14b, relative movement of the lower rail 3 and the upper rail 4 is allowed.

  The lock lever 26 is formed with an abutting piece 26 d that extends upward from the longitudinal center of the main body 26 a and is bent outwardly away from the other lock lever 26. One end and the other end of the torsion spring 27 through which the lock lever pin 24 is inserted are engaged with the contact pieces 26d between the pair of bearing pieces 21b. The two lock levers 26 are rotated in the direction in which the lock claws 26c are separated from each other by the single torsion spring 27, that is, in the direction in which the lock claws 26c are inserted into the insertion holes 14a and 14b. Always biased in the direction.

  As shown in FIG. 2, a release bracket 28 as a release member made of a plate material is supported on the extension piece 21 c of the support bracket 21 so as to be rotatable around the hinge pin 23. That is, the release bracket 28 has a mounting piece 28a extending in parallel with the extending piece 21c, and the hinge pin 23 is inserted into a shaft insertion hole 28b formed at the center of the mounting piece 28a so as to face the hinge pin 23. Is inserted and is rotatably supported.

  Further, the upper end of the mounting piece 28a disposed on one side (the right side in FIG. 2) with respect to the shaft insertion hole 28b is bent at a right angle and continues to the contact wall portion 28c that covers the upper side of both lock levers 26. The corresponding wall portion 28c is divided into two in the width direction to form a pair of bracket-side contact pieces 28d. These bracket-side contact pieces 28d are arranged so as to simultaneously come into contact with the contact pieces 26d of the pair of lock levers 26 on their lower surfaces as the release bracket 28 rotates around the hinge pin 23 in the clockwise direction shown in the drawing. ing. Therefore, when the abutting pieces 26d of the pair of lock levers 26 are simultaneously pressed by the bracket-side abutting pieces 28d by the rotation of the release bracket 28, the lock levers 26 are attached to the torsion springs 27. The lock claw 26c is rotated in the rotational direction in which each lock claw 26c is retracted against the force, that is, the rotation direction in which the lock claw 26c is disengaged from the insertion holes 14a and 14b (see FIG. 6).

  Furthermore, the upper end of the mounting piece 28a disposed on the other side (left side in FIG. 2) with respect to the shaft insertion hole 28b is continuous with the lever mounting portion 28e bent at a right angle on the side away from the upper rail 4, and the The release handle 6 (see FIG. 1) is fitted and held on the lever mounting portion 28e. Accordingly, when the release bracket 28 is rotated around the hinge pin 23 in the clockwise direction by the operation of the release handle 6, as shown in FIG. 6, the pair of locks are caused by the lower surfaces of the bracket-side contact pieces 28d. The contact piece 26d of the lever 26 is simultaneously pressed, and the lock lever 26 rotates in the rotation direction on the side where the lock claw 26c is detached from the insertion holes 14a, 14b and the like. Note that the release bracket 28 is always constantly urged to rotate in a direction (counterclockwise rotation direction in FIG. 2) in which the bracket-side contact piece 28d is basically separated from the contact piece 26d by an urging means (not shown).

  In such a configuration, when the relative movement of the upper rail 4 with respect to the lower rail 3 is restricted by the engagement between the lock claws 26c of the lock levers 26 and the lock holes 13a and 13b of the lower rail 3, the seat 5 is placed on the vehicle floor 2. On the other hand, it is held at a predetermined position. Further, the release handle 6 is operated to rotate the release bracket 28, and the contact pieces 26 d are simultaneously pressed by both bracket-side contact pieces 28 d so that both lock levers 26 are resisted against the urging force of the torsion spring 27. When rotated, the engagement between the lock claws 26c of both lock levers 26 and the lock holes 13a, 13b of the lower rail 3 is released. As a result, the upper rail 4 can move relative to the lower rail 3, and the seat 5 supported by the upper rail 4 can slide in the vehicle front direction and the rear direction with respect to the vehicle floor 2. That is, the position of the seat 5 in the vehicle front-rear direction with respect to the vehicle floor 2 can be adjusted.

As described above in detail, according to the present embodiment, the following effects can be obtained.
(1) In the present embodiment, the pair of lock levers 26 have the same shape, so that both the lock levers 26 can be shared as the same part. And manufacturing cost can be reduced. Further, since the pair of lock levers 26 are arranged in the longitudinal direction of the upper rail 4, the space occupied by both the lock levers 26 in the direction can be reduced, and the degree of freedom in design is improved. be able to.

  (2) In the present embodiment, the rotation axis O of the pair of lock levers 26 is disposed on the upper side of the rail cross section of the upper rail 4, so that the upper side thereof does not interfere with the rail cross section of the upper rail 4. Thus, the upper rail 4 can be rotatably assembled.

  (3) In the present embodiment, the operating force for removing the lock claw 26c from the lock holes 13a and 13b is transmitted to the pair of lock levers 26 by a single release bracket 28 at the same time. The number of parts can be reduced as compared with the case where the release member provided in the transmission member is transmitted to each lock lever 26.

  In addition, the synchronization of the operation of both lock levers 26 can be obtained more reliably. And the lock release via the release bracket 28 by the operation of the release handle 6 can be performed more reliably.

  (4) In this embodiment, the pair of lock levers 26 are urged simultaneously by the single torsion spring 27 toward the side where the lock claw 26c is inserted into the lock holes 13a and 13b, thereby reducing the number of parts. Can be reduced.

  (5) In the present embodiment, the lock claws 26c of the pair of lock levers 26 are alternately arranged, and the rotation axes O of the lock levers 26 are made to coincide with each other, and the lock levers 26 are moved by a single torsion spring 27. By urging in the locking direction, the lateral width of the rail cross section can be reduced as a whole, and as a result, weight and cost can be reduced.

  (6) In the present embodiment, a plurality (three) of the lock claws 26c of each lock lever 26 are simultaneously inserted into and removed from the lock holes 13a and 13b. These lock claws 26c are simultaneously engaged with the lock holes 13a and 13b. As a result, even if these lock claws 26c come into contact with the lock holes 13a and 13b in the middle of insertion / removal, the contact occurs simultaneously, and the load at that time is distributed between the lock claws 26c, and the lock Breakage of the claw 26c can be suppressed.

  (7) In the present embodiment, the relative movement of the lower rail 3 and the upper rail 4 is regulated by the simultaneous insertion of the lock claws 26c of the pair of lock levers 26 into the lock holes 13a and 13b. Strength can be obtained.

In addition, you may change the said embodiment as follows.
-As shown in FIG.7 and FIG.8, you may arrange | position the lock holes 13a and 13b each formed in both the folding | turning wall parts 13 of the said lower rail 3 so that it may oppose in the width direction. In this case, the pair of lock levers 26 are arranged so that the respective lock claws 26c are staggered. For example, as shown in FIG. 7, the lock claws 26c of one lock lever 26 are inserted into the lock holes 13a. When inserted and the relative movement of the lower rail 3 and the upper rail 4 is restricted, the lock claw 26c of the other lock lever 26 is brought into contact with the folded wall portion 13 between the adjacent lock holes 13b.

  Further, as shown in FIG. 8, when the lock claw 26c of the other lock lever 26 is inserted into the lock hole 13b and the relative movement of the lower rail 3 and the upper rail 4 is restricted, The lock claw 26c is brought into contact with the folded wall portion 13 between the adjacent lock holes 13a.

  As described above, the restriction position of the relative movement of the lower rail 3 and the upper rail 4 can be adjusted at a pitch that is ½ of the predetermined interval at which the lock holes 13a and 13b are arranged in parallel. That is, the pitch of the relative positions of the lower rail 3 and the upper rail 4 that can be regulated by the pair of lock levers 26 can be reduced. And the position of the vehicle front-back direction with respect to the vehicle floor 2 of the seat 5 can be finely adjusted.

  -In the said embodiment, the vertical relationship of the lower rail 3 and the upper rail 4 may be reverse. That is, the upper rail 4 may be fixed to the vehicle floor 2 and the lower rail 3 may be fixed to the seat 5.

-In the said embodiment, the number of the lock claws 26c provided in each lock lever 26 should just be one or more.
In the above embodiment, the lower rail 3 and the upper rail 4 (vehicle seat slide device) may be arranged one by one with respect to the seat 5, or three or more each. It may be.

In the above-described embodiment, the movement direction of the seat accompanying the relative movement of the lower rail and the upper rail may be, for example, the vehicle width direction.
Next, the technical idea that can be grasped from the above embodiment and other examples will be described below.

In the vehicle seat slide device according to claim 1 or 2,
The pair of lock members are configured to restrict the relative movement of the first and second rails by inserting the lock claws into the lock holes at different relative positions of the first and second rails. A vehicle seat slide device. According to this technical idea, the pitch of the relative positions of the first and second rails that can be regulated by the pair of lock members can be reduced.

The side view which shows the vehicle seat to which this invention is applied. The disassembled perspective view which shows one Embodiment of this invention. The side view which shows the same embodiment. The top view which shows the same embodiment. Sectional drawing along the AA line of FIG. Sectional drawing which shows the operation | movement of the embodiment. Sectional drawing which shows operation | movement of the deformation | transformation form of this invention. Sectional drawing which shows operation | movement of the deformation | transformation form of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Vehicle seat, 2 ... Vehicle floor, 3 ... Lower rail (1st rail), 4 ... Upper rail (2nd rail), 5 ... Seat, 13 ... Folding wall part (wall part), 13a, 13b ... Lock hole, 26 ... Lock lever (lock member), 26c ... Lock claw, 27 ... Torsion spring (biasing means), 28 ... Release bracket (release member).

Claims (4)

A first rail that is fixed to one of the vehicle floor and the seat and has walls on both sides in the width direction;
A second rail fixed to the other of the vehicle floor and the seat and movable relative to the first rail;
A plurality of lock holes respectively arranged in parallel on the both wall portions along the longitudinal direction of the first rail;
A pair of locking members having the same shape and arranged rotatably around the rotation axis along the longitudinal direction of the second rail;
The pair of locking members is
Arranged overlapping in the longitudinal direction of the second rail,
Each has a locking claw that can be inserted into and removed from the locking hole of the both wall portions with the rotation around the rotation axis,
The vehicular seat slide device is characterized in that the relative movement of the first and second rails is restricted by inserting at least one lock claw of the pair of lock members into the lock hole. The vehicle seat slide device according to claim 1,
The first and second rails each have a U-shaped rail cross section whose opening sides are butted against each other,
The vehicle seat slide device according to claim 1, wherein the rotation shafts of the pair of lock members are disposed outside a rail cross section of the second rail. The vehicle seat slide device according to claim 1 or 2,
The pair of lock members are configured to simultaneously insert the respective lock claws into the lock holes and restrict relative movement of the first and second rails,
A vehicle seat slide device comprising: a release member that simultaneously transmits an operation force for removing the lock claw from the lock hole to the pair of lock members. In the vehicle seat slide device according to any one of claims 1 to 3,
A vehicle seat slide device comprising a single urging means for simultaneously urging the pair of lock members on a side where the lock claw is inserted into the lock hole.

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