JP2004359072A - Seat sliding device of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a foreign substance from being caught and broken between a backward moving upper rail and a bolt. <P>SOLUTION: The upper rail 2 fixed to a seat is slidably fitted to a lower rail 1 fixed to the floor of a vehicle via a bolt 22, and the seat slide device of a vehicle has a locking mechanism 6 for changing and locking a slide position of the upper rail 2 to the lower rail 1. The front side of the back bolt 22 is provided with a tapered inclined portion 23 of which height becomes substantially the same as the height of the head of the bolt 22 as it goes from the front side toward the bolt 22. Thus a foreign substance pressed by the upper rail 2 is prevented from being caught and broken between the upper rail 2 and the head of the bolt 22. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a seat slide device for a vehicle, and when a seat is slid backward, foreign matter is caught and damaged between an upper rail fixed to the seat and a bolt for fixing a lower rail to a floor. It is a thing which prevented.
[0002]
[Prior art]
In recent years, there has been a demand for diversifying seat layouts for automotive seats, and seat slide devices are provided not only on front seats but also on second seats, third seats, and the like. The seat slide device employed here is required to be installed under conditions with many restrictions, such as having to be embedded in the floor of the vehicle or installed in a narrow space.
[0003]
Therefore, in order to realize installation under such severe conditions, conventionally, an upper rail fixed to a seat is slidably assembled to a lower rail fixed to a vehicle floor, and a sliding position of the upper rail with respect to the lower rail. And a lock mechanism for changing and locking the lock is provided, and the lock mechanism is arranged in a narrow space between the lower rail and the upper rail to constitute a seat slide device of a vehicle.
[0004]
In this seat slide device, both ends of the lower rail are connected to the floor via bolts, and when foreign matter such as a writer or a writing instrument has fallen into the interior of the lower rail, when the upper rail is lowered rearward together with the seat. In some cases, foreign matter is pushed by the upper rail and moves rearward, and the foreign matter may be damaged by being pinched between the upper rail and the bolt.
[0005]
In order to solve such a problem, a configuration is adopted in which a cover member is provided at the rear portion of the lower rail so that foreign matter does not fall into the lower rail (for example, see Patent Document 1).
[0006]
[Patent Document 1]
JP-A-2002-192994
[Problems to be solved by the invention]
However, in order to cover only a small space between the bolt and the upper rail, not only the cover member is provided with an “attaching means” for attaching the cover member to the lower rail, but also a large leg cover is provided. "Processing" must be performed to attach the cover to the lower rail, which increases the production cost.
[0008]
Therefore, the present invention provides a seat slide device for a vehicle provided with an “escape portion” for allowing foreign substances to escape so as not to be caught between the upper rail and the bolt with a simple configuration using existing components. Aim.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, according to the configuration of the invention according to claim 1, an upper rail fixed to a seat is slidably assembled to a lower rail fixed to a floor of a vehicle, and a sliding position of the upper rail with respect to the lower rail is determined. A seat slide device for a vehicle provided with a lock mechanism for changing and locking, wherein the front and rear portions of the lower rail are each supported on the floor via a fixing member, wherein a bottom surface in the lower rail is provided. It is characterized in that a tapered relief portion is provided which is substantially the same as the height of the head of the fixing member or higher than the height of the head of the fixing member toward the end of the lower rail.
[0010]
According to the present invention, the foreign material is not prevented from dropping between the head of the fixing member and the upper rail, and even if the foreign material falls into the lower rail, the foreign material is pushed by the upper rail when the upper rail is retracted together with the sheet. The foreign material that recedes along the tapered relief portion and escapes from the fixing member, and comes off the lower rail. For this reason, there is no possibility that the foreign matter is caught between the upper rail and the fixing member and is damaged.
[0011]
According to a second aspect of the present invention, in the first aspect, the relief portion is fixed to a bottom surface of the lower rail and is formed integrally with a lock plate constituting the lock mechanism.
[0012]
In the present invention, since the relief portion is formed integrally with the lock plate, a part of the lock plate may be additionally processed, and it is not necessary to newly provide a member. In addition, since the relief portion is continuous from the lock plate, there is no place where the foreign matter is caught and it can be reliably removed.
[0013]
According to a third aspect of the present invention, in the second aspect, a rear end of the lock plate is coupled to the floor together with the lower rail by a bolt as the fixing member.
[0014]
According to the present invention, the lock plate is connected to the floor side by bolts for fixing the lower rail to the floor side, so that the force acting on the lock plate is directly transmitted to the floor side, so that the number of parts can be increased without increasing the number of parts. Strength can be improved.
[0015]
According to a fourth aspect of the present invention, in the second aspect, the lock plate is connected to a bottom surface of the lower rail by welding.
[0016]
According to the present invention, since a bolt or the like is not used for coupling the lock plate to the lower rail, it is possible to cope with a case where a bolt used as a fixing member is embedded on the floor side and the lower rail is mounted on the floor side via the bolt and the nut. In addition, the connection between the lower rail and the lock plate can be strengthened to improve the lock strength.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, Embodiments 1 and 2 of the present invention will be described with reference to the drawings.
(A) Embodiment 1
First, Embodiment 1 will be described with reference to FIGS.
[0018]
FIG. 1 is an exploded perspective view of a seat slide device of a vehicle according to the present invention, FIGS. 2, 3 and 7 are partial cross-sectional side views of the seat slide device, and FIGS. 4 to 6 intersect with the longitudinal direction of the seat slide device. The cross-sectional views in the directions shown in FIG.
[0019]
As shown in FIG. 1, the seat slide device includes a lower rail 1 fixed to a floor of a vehicle, and upper rails 2 attached to lower left and right ends of a seat. The upper rail 2 is held by a retainer 3 with respect to the lower rail 1. The roller 4 is slidable in the length direction via the roller 4 and the guide ball 5.
[0020]
Specifically, the cross-sectional shape of the lower rail 1 is configured such that a bent portion 1a that is bent inward is extended at the upper end of a substantially U-shaped basic cross-sectional portion whose opening is upward, and the cross-sectional shape of the upper rail 2 is A similar opening is formed by extending a bent portion 2a which is bent outward at the lower end of the downward substantially U-shaped basic cross section. The upper rail 2 is assembled so that the bent portion 1a of the lower rail 1 is sandwiched between each bent portion 2a and the side portions 2b and 2e opposed thereto. The retainer 3 is incorporated 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 bent portion 2 a of the upper rail 2, and the guide ball 5 is formed by the bent portion 2 a of the upper rail 2. Guide the sides.
[0021]
A lock mechanism 6 for fixing the upper rail 2 after sliding along the lower rail 1 is provided between the lower rail 1 and the upper rail 2 configured as described above. The lock mechanism 6 includes a latch lever 8, a claw support plate 12, and a lock plate 10. The latch lever 8 and the claw support plate 12 are supported by the upper rail 2, and the lock plate 10 is connected to the lower rail 1. The upper rail 2 is fixed to the lower rail 1 by engaging the lock claw 7 of the rotating latch lever 8 with the support hole 14 of the claw support plate 12 and then with the fitting hole 9 of the lock plate 10. Is done.
[0022]
The latch lever 8 is formed in a substantially U-shape, and two opposing sides of the U-shape are rotatably provided on the upper rail 2 via a pair of support brackets 16. An input arm 18 is integrally formed on one side of the latch lever 8, and an operation force is externally input to the latch lever 8 via the input arm 18. As shown in FIGS. 4 and 5, a plurality of (four in this embodiment) lock claws 7 are formed on one side of a portion connecting two opposing sides of the latch lever 8. On the other side, a pair of first spring hooks 17a and a single second spring hook 17b are formed so as to protrude in two directions substantially perpendicular to the length direction of the rod-shaped spring 11. The first spring hook 17a and the second spring hook 17b are at substantially 90 degrees to each other. The support bracket 16 is fixed to the top of the upper rail 2 together with the claw support plate 12. That is, the fitting piece 16a rising from the support bracket 16 is fitted into the fitting hole 12a of the claw support plate 12 and the fitting hole 2c of the upper rail 2, and then the fitting piece 16a is heated and pressed / deformed. , The support bracket 16 and the claw support plate 12 are connected to the upper rail 2. Shafts 19 and 20 are protruded from the mutually opposed vertical portions of the pair of brackets 16 by embossing. By inserting the shafts 19 and 20 into the holes 8 a of the latch lever 8, the latch levers 8 are formed. Are rotatably supported.
[0023]
The claw support plate 12 includes a pair of mounting portions 12b, 12b separated from each other, and a vertical portion 12c extending from the mounting portions 12b, 12b to connect the mounting portions. 12b is attached to a substantially central portion in the longitudinal direction of the upper portion of the upper rail 2, and the vertical portion 12c is disposed so as to be slightly deviated to one side 2b. A plurality of support holes 14 for inserting the lock claws 7 of the latch lever 8 are formed below the vertical portion 12c along the longitudinal direction of the upper rail 2.
[0024]
A rod-shaped spring (spring member) 11 is provided for rotating the latch lever 8 in a direction in which the lock claw 7 of the latch lever 8 is engaged with the fitting hole 9 of the lock plate 10. The rod-shaped spring 11 has a substantially rectangular shape as a whole, and both ends of the rod-shaped spring 11 are bent at substantially right angles, and the bent portion has an arc shape. In order to position the latch lever 8 with respect to the second spring hooking portion 17b at the central portion of the bar spring 11, the second spring hooking portion (moving portion) 17b of the latch lever 8 is clamped from the longitudinal direction of the bar spring 11. A pair of projecting portions (restriction portions) 11a are formed.
[0025]
The rod-shaped spring 11 has both ends in contact with the inside of a bent portion where the upper part of the upper rail 2 and the other side 2e intersect, and the center thereof has a pair of first spring hooks 17a and a single second spring. The hook portion 17b abuts on a portion projecting at a substantially right angle, and constantly urges the lock claw 7 of the latch lever 8 toward one side 2b of the upper rail 2. Since the pair of protrusions 11a of the bar-shaped spring 11 sandwich the second spring hook 17b from the length direction of the bar-shaped spring 11, the bar-shaped spring 11 does not move in the length direction.
[0026]
The lock plate 10 has a substantially L-shaped cross section over substantially the entire region except both ends in the longitudinal direction, and is formed to be long so as to cover a predetermined range in the longitudinal direction of the lower rail 1. A base 10a, which forms one side of the L-shape of the lock plate 10, is joined to a substantially central portion in the width direction of the bottom surface of the lower rail 1 at a plurality of locations in the length direction by spot welding, projection welding, or the like. Are provided with anchor areas at both ends. A bolt 22 as a fixing means for fixing the rail is inserted through the anchor area, and the anchor area is connected to the floor by the bolt 22 when the lower rail 1 is fixed to the floor of the vehicle.
[0027]
A plurality of the above-described fitting holes 9 are formed in the vertical portion 10b forming the other side of the L-shape in the lock plate 10 in the longitudinal direction, and as shown in FIG. It is arranged between the vertical portion 12 c of the plate 12 and one side 2 b of the upper rail 2. Since the fitting hole 9 of the vertical portion 10b is a portion into which the lock claw 7 of the latch lever 8 is inserted and fitted, the pitch between the adjacent fitting holes 9, 9 is the same as the pitch of the lock claw 7. .
[0028]
An inclined portion (relief portion) 23 is formed at the rear end of the base 10a of the lock plate 10 by bending the base 10a. Even when the upper rail 2 retreats and pushes the writer or the like rearward after the writer or the like falls into the lower rail 1, the inclined portion 23 does not catch the writer or the like on the head of the bolt 22. It is formed in order to get over.
[0029]
In addition, as shown in FIG. 4, at one side 2 b of the upper rail 2, at a position facing the support hole 14 of the claw support plate 12, a depression recessed in a direction approaching the vertical portion 10 b of the lock plate 10. A portion 25 is provided, and a similar support hole 26 is formed in the depression 25 so as to correspond to the support hole 14. The support hole 26 of the concave portion 25 is a portion into which the tip of the lock claw 7 is inserted and engaged at the time of locking, and the second claw support portion that supports the lock claw 7 together with the support hole 14 of the claw support plate 12. Is composed.
[0030]
A notch 2d is formed substantially at the center of the upper rail 2 in the axial direction so as to straddle the top and one side 2b, and the input arm 18 of the latch lever 8 projects slightly outside the rail 2 through the notch 2d. ing. On the upper rail 2 side, a holder 29 of an operation lever 28 is pivotally supported via a support bracket or the like (not shown), and the input arm 18 is vertically moved by an operation piece 29a at the rear end of the holder 29. The swing operation is performed. Therefore, when the tip of the operation lever 28 is pivoted upward, the operation piece 29a pushes the input arm 18 downward, whereby the latch lever 8 moves the lock plate 10 against the urging force of the rod spring 11. Is turned in a direction to open the.
[0031]
A similar seat slide device is also arranged on the other side of the seat, and the other end of the operation lever 28 is also connected to the seat slide device in the same manner, and the operation force of the operation lever 28 is similarly set at the other end. It is also transmitted to the seat slide device. Therefore, the lock mechanisms 6 on the left and right sides of the seat are always operated simultaneously in conjunction with each other.
[0032]
Since the seat slide device is configured as described above, when the seat is locked at an arbitrary slide position, the latch lever 8 receives the urging force of the bar spring 11 and moves to the lock plate 10 as shown in FIG. At this time, the lock claw 7 of the latch lever 8 is inserted through 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. Have been.
[0033]
To change the seat to a different position in the front-rear direction from this state, the tip of the operation lever 28 is rotated upward, and the latch lever 8 is pressed against the urging force of the bar spring 11 as shown in FIG. The lock pawl 7 of the latch lever 8 is pulled out of the support hole 26, the fitting hole 9 and the support hole 14, thereby allowing the sheet to slide freely. In this state, the slide position of the seat is changed to an arbitrary position, and then the operation lever 28 is released. Then, the latch lever 8 returns to the original state by the urging force of the bar spring 11, the lock claw 7 is inserted through the three of the support hole 14, the fitting hole 9 and the support hole 26, and the sheet is fixed again.
[0034]
For example, as shown in FIG. 7, when the seat is slid most forward, a lighter or the like has fallen into the lower rail 1 located behind the upper rail 2, and the upper rail 2 is moved together with the seat to the position shown in FIG. When the vehicle is retracted, the lighter or the like is pushed by the upper rail 2, but the lighter or the like rides on the bolt 22 along the inclined portion 23 due to the existence of the inclined portion 23 and is discharged from the inside of the lower rail 1 to the outside. This prevents the lighter or the like from being damaged by being caught between the upper rail 2 and the bolt 22. Since the inclined portion is formed integrally with the lock plate, a part of the lock plate may be additionally processed, and it is not necessary to newly provide a member.
(B) Embodiment 2
Next, a second embodiment of the present invention is shown in FIG.
[0035]
The second embodiment is different from the first embodiment in that the lock plate 10 does not have an anchor region at both ends, and the base 10a is connected to the lower rail 1 without using bolts. It is welded to the bottom surface of the lower rail 1, and an inclined portion 23 is formed at the rear end of the base 10a.
[0036]
Other configurations and operations are the same as those of the first embodiment, and thus description thereof is omitted.
[0037]
The present invention is not limited to those described in the first and second embodiments. For example, a separate member having a tapered relief portion without forming the lock plate as a tapered relief portion by bending the lock plate. May be mounted on the lock plate via a bolt, an adhesive, or a double-sided tape. Further, in the embodiment, the structure in which the lower rail is directly supported on the floor of the vehicle body has been described. However, the case where the lower rail is supported via the leg bracket is also the same. In this case, the fixing member fixes the leg bracket and the lower rail. It becomes a caulking pin.
[0038]
【The invention's effect】
As described above, according to the vehicle seat slide device of the present invention, the height of the head of the fixing member is substantially the same as the height of the head of the fixing member or the head of the fixing member on the bottom surface in the lower rail toward the end of the lower rail. The tapered relief part is provided with a tapered relief part that is higher than the height of the part. Rises along and escapes from the fixing member, and comes off the lower rail. For this reason, there is no possibility that the foreign matter is caught between the upper rail and the fixing member and is damaged.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a first embodiment of a vehicle seat slide device according to the present invention.
FIG. 2 is an explanatory diagram showing a state in which a seat is slid most rearward according to the first embodiment;
FIG. 3 is an enlarged view of a main part of FIG. 2 according to the first embodiment;
FIG. 4 is a view on arrow AA of FIG. 3, showing a locked state.
FIG. 5 is a view taken in the direction of arrows AA in FIG. 3 and shows a state of unlocking;
FIG. 6 is a view taken in the direction of arrows BB in FIG. 3;
FIG. 7 is an explanatory view showing a state in which the seat is slid forward most according to the first embodiment;
FIG. 8 is an enlarged view of a main part corresponding to FIG. 3 according to the second embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Lower rail 2 ... Upper rail 6 ... Lock mechanism 10 ... Lock plate 22 ... Bolt 23 ... Inclined part

Claims (4)

A seat slide device for a vehicle, comprising: a lower rail fixed to a floor of a vehicle, an upper rail fixed to a seat slidably assembled, and a lock mechanism for changing a position of the upper rail with respect to the lower rail to lock the rail. In a vehicle seat slide device in which the front and rear portions of the lower rail are respectively supported on the floor via fixing members,
On the bottom surface in the lower rail, a tapered relief portion that is substantially the same as the height of the head of the fixing member or higher than the height of the head of the fixing member is provided toward the end side of the lower rail. A seat slide device for a vehicle, comprising: The vehicle seat slide device according to claim 1, wherein the relief portion is fixed to a bottom surface of the lower rail and is formed integrally with a lock plate constituting the lock mechanism. 3. The vehicle seat slide device according to claim 2, wherein a rear end of the lock plate is coupled to the floor together with the lower rail by a bolt as the fixing member. The seat slide device for a vehicle according to claim 2, wherein the lock plate is connected to a bottom surface of the lower rail by welding.

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