JP2005297870A - Seat sliding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat sliding device structured so that a belt anchor plate 60 stretching in the rail direction is attached to an upper rail 50, capable of preventing the upper rail 50 from separating from the lower rail 10 even when an excessive load is applied to a seat belt. <P>SOLUTION: The seat sliding device has the lower rail 10 and the upper rail 50 to slide on the lower 10, and is structured so that the belt anchor plate 60 stretching in the rail direction is attached to the upper rail 50. In such a way as stretching in the rail direction, a reinforcement 70 is fixed rigidly to the belt anchor plate 60, and a cylinder having a box-shaped section is formed from the reinforcement 70 and the belt anchor plate 60. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a seat slide device in which an upper rail that supports a seat is slidably provided on a lower rail fixed to a floor surface of a vehicle, and a belt anchor plate of a seat belt is attached to the upper rail.

  A seat slide having a lower rail fixed to a vehicle floor and an upper rail that is slidably engaged with the lower rail and supports a seat, and a belt anchor plate is attached to the upper rail along the rail direction A device is provided.

The following (1) and (2) are listed as seat slide devices having a belt anchor on the upper rail side and preventing the upper rail from peeling off from the lower rail when an excessive load is applied to the seat belt. be able to.
(1) The lower rail and the upper rail sliding on the lower rail are provided with an engaging portion along the rail direction, and the belt anchor bracket is attached to the upper rail, and the engagement between the flange provided on the belt anchor bracket and the lower rail A seat slide device having a minute gap between the upper surface and the upper surface (see Patent Document 1). When an excessive force is applied to the seat belt, the lower rail is pressed and integrated with the flange of the belt anchor bracket to prevent separation between the upper rail and the lower rail.
(2) The seat cushion frame is supported by a pair of upper rails that slide on a pair of lower rails supported on the floor surface at two front and rear support positions, and a belt anchor is fixed to the rear portion of the seat cushion frame. The cross-sectional shape of the lower rail below the engaging portion with the upper rail is stepped so that the maximum deformation portion of the lower rail when an excessive force is applied to the seat belt is on the front side of the middle of the two support positions. The seat slide device changed to (see Patent Document 2).

Japanese Patent Application Laid-Open No. 07-108860. Japanese Patent Application Laid-Open No. 2004-017762.

In the seat slide device in which the belt anchor is attached to the upper rail side, it is required that the upper rail does not peel from the lower rail in an evaluation test in which an excessive predetermined load is applied to the seat belt.
As an example of a seat slide device in which a belt anchor is attached to the upper rail side, there is a seat slide device in which a belt anchor plate extending along the rail direction is attached to the upper rail. In this seat slide device, when a predetermined load determined according to the evaluation test is applied to the seat belt, the belt anchor plate bends near the center in the rail direction, which may cause the upper rail to peel off from the lower rail. is there.
The present invention relates to a seat slide device having a lower rail fixed on a floor surface and a seat supporting upper rail sliding on the lower rail, and a belt anchor plate extending along the rail direction being attached to the upper rail. The purpose of the above is to prevent the upper rail from peeling off from the lower rail in the above evaluation test.
Note that Patent Document 1 is a technique for preventing separation related to a seat slide device in which a belt anchor bracket and its flange are provided at the rear portion of the upper rail, and is not a technology related to a seat slide device having a configuration intended by the present application.
Patent Document 2 discloses a lower rail having a T-shaped cross section and having a hanging portion on both sides of the upper side of the T-shape, and an upper provided on both sides with an engaging portion that engages the lower rail so as to wrap the hanging portion from the outside. This is a technique for preventing separation related to a seat slide device including a rail, and is not a technology related to a seat slide device having a configuration intended by the present application.

The present invention is configured as the following [1] to [3]. In addition, in the following [1] to [3], the reference numerals are given to help the understanding of the present invention, and the scope of the present invention is not intended to be limited to the configuration of the reference numerals.
[1] Configuration 1:
The lower rail 10 is fixed to the floor surface, and the upper rail 50 is slidably engaged with the lower rail 10 to support the seat. A belt anchor plate 60 is attached to the upper rail 50 along the rail direction. A seat slide device comprising:
The belt anchor plate 60 has a reinforcing member 70 that is integrally fixed along the rail direction and forms a box-shaped cross-section tube together with the belt anchor plate 60.
A seat slide device characterized by that.

[2] Configuration 2:
In claim 1,
The upper rail 50 has an overhanging portion 51 extending toward the side to which the reinforcing member 70 is fixed and a lower position near the base of the overhanging portion 51 in the attachment range of the belt anchor plate 60. A through-hole 52 provided,
The belt anchor plate 60 has a through hole 62 at a portion corresponding to the through hole 52 of the upper rail 50 in the attached state.
The reinforcing member 70 has an engaging portion 71 that engages with the protruding portion 51 of the upper rail 50 from the lower side in a fixed state, and the upper rail 50 and the belt anchor plate 60 are at the tips of the engaging portion. A projecting piece 72 corresponding to the through holes 52, 62;
The engaging portion 71 of the reinforcing member 70 is engaged from the lower side of the protruding portion 51 of the upper rail 50, and the protruding piece 72 at the tip of the engaging portion 71 is connected to the upper rail 50 and further to the belt anchor plate 60. After inserting and projecting through the through holes 52 and 62, the tip 72a is welded to the belt anchor plate 60.
A seat slide device characterized by that.
[3] Configuration 3:
In configuration 2,
The belt anchor plate 60 has an overhanging portion 61 extending to the side to which the reinforcing member 70 is fixed,
The reinforcing member 70 has an overhanging portion 75 that engages with the overhanging portion 61 of the belt anchor plate 60 from below in a fixed state.
The overhanging portion 75 of the reinforcing member 70 and the overhanging portion 61 of the belt anchor plate 60 are welded.
A seat slide device characterized by that.

  The seat belt device according to Configuration 1 includes a lower rail 10 fixed to a floor surface, and an upper rail 50 that is slidably engaged with the lower rail 10 and supports a seat. The belt anchor plate 60 is attached to the belt anchor plate 60 and the reinforcing member 70 is integrally fixed to the belt anchor plate 60 along the rail direction so as to form a box-shaped cross-section cylinder together with the belt anchor plate 60. Even when a predetermined load determined according to the test is applied to the seat belt, the belt anchor plate 60 is prevented from being bent near the center in the rail direction, and the upper rail 50 is also prevented from peeling off from the lower rail 10.

The seat belt device according to the second aspect is the same as that of the first aspect, wherein the upper rail 50 has an overhang portion 51 and an overhang portion projecting to the side to which the reinforcing member 70 is fixed in the attachment range of the belt anchor plate 60. The belt anchor plate 60 has a through hole 62 at a portion corresponding to the through hole 52 of the upper rail 50 in the attached state. The reinforcing member 70 has an engaging portion 71 that engages with the protruding portion 51 of the upper rail 50 from below in a fixed state, and the upper rail 50 and the through-hole 52 of the belt anchor plate 60 at the tip of the engaging portion. , 62, and the engaging portion 71 of the reinforcing member 70 is engaged from the lower side of the overhanging portion 51 of the upper rail 50 and the engaging portion 71. Since the protruding piece 72 at the front end is inserted and protruded through the through-holes 52 and 62 of the upper rail 50 and the belt anchor plate 60, the front end 72a is welded to the belt anchor plate 60. 70 is more firmly integrated with the belt anchor plate 60 and the upper rail 50, and as a result, the effect of the configuration 1 is further improved. Further, since it is not necessary to weld the reinforcing member 70 to the upper rail 50, no warp is generated at the end of the upper rail 50 in the rail direction due to the thermal stress of the welding. Therefore, the upper rail 50 is caused by the warp. There is no inconvenience that rattling or abnormal noise occurs in the lower rail 10.
The seatbelt device according to Configuration 3 is that, in Configuration 2, the belt anchor plate 60 has an overhanging portion 61 extending to a side to which the reinforcing member 70 is fixed, and the reinforcing member 70 is in a fixed state. The overhanging portion 75 of the belt anchor plate 60 is engaged with the overhanging portion 61 from below, and the overhanging portion 75 of the reinforcing member 70 and the overhanging portion 61 of the belt anchor plate 60 are welded. Therefore, the reinforcing member 70 is more firmly integrated with the belt anchor plate 60 and the upper rail 50, and as a result, the effects of the configuration 2 are further improved.

Embodiments of the present invention will be described below with reference to the drawings.
1 is a front view of the seat slide device according to the present embodiment as viewed from the reinforcement (reinforcing member) 70 side, FIG. 2 is a cross-sectional view taken along the line aa in FIG. 1, and FIG. It is a perspective view which shows a mode that it attaches.

The lower rail 10 is fixed on the floor surface of the vehicle.
The lower rail 10 includes a bottom portion 14, wall portions 13 and 13 erected upward from both sides (both sides in FIG. 2) of the bottom portion 14, and a top plate extending inward from the both wall portions 13 and 13. Parts 12, 12 and hanging parts 11, 11 hanging downward from both top plate parts 12, 12 respectively. In FIG. 2, the left hanging part 11 penetrates into a lock hole 82 provided at a predetermined interval in a lower projecting part of the lock plate 80 supported by the upper rail 50 so as to be rotatable. It is formed as a lock tooth for locking the rail 50 with respect to the lower rail 10. Since the mechanism for locking the upper rail 50 to the lower rail 10 by the lock plate 80 is well known and is not related to the gist of the present invention, further description in this specification is omitted.

On the bottom 14 of the lower rail 10, an upper rail 50 that holds a plurality of rollers (not shown) on the lower end side is engaged so as to be slidable in the front-rear direction (left-right direction in FIG. 1).
The upper rail 50 includes a wall portion 53 provided in the vertical direction, and a protruding portion that is bent and extended at a right angle so as to protrude from the upper edge portion of the wall portion 53 to the reinforcement 70 side (left side in FIG. 2). 51, a bottom portion 56 that is bent and extended perpendicularly from the lower portion of the wall portion 53 in the opposite direction to the overhang portion 51, and an upright portion 57 that is bent and extended upward from the tip edge of the bottom portion 56. . Further, the upper rail 50 has a plurality of through holes 52, 52, through which the plurality of projecting pieces 72, 72, etc. of the reinforcement 70 are inserted at a lower position near the base of the overhanging portion 51. , Provided intermittently along the rail direction. A through hole 55 through which the overhanging portion 81 of the lock plate 80 passes is provided in the wall portion 53 of the upper rail 50.

Near the upper edge of the wall 53 of the upper rail 50, the vicinity of the lower edge of the wall 63 of the belt anchor plate 60 is fixed with a rivet (not shown). The rivets are used at four locations (not shown) in the rail direction (front-rear direction; left-right direction in FIG. 1).
As described above, since the wall 63 of the belt anchor plate 60 is fixed to the wall 53 of the upper rail 50 by rivets as described above, the wall 63 of the belt anchor plate 60 is also provided in the vertical direction. Will be. From the upper edge portion of the wall portion 63, the overhang portion 61 is bent and extended at a right angle so as to project toward the reinforcement 70 side (left side in FIG. 2). The belt anchor plate 60 has a plurality of through holes 62, 62, through which the plurality of projecting pieces 72, 72, etc. of the reinforcement 70 are inserted, and a plurality of through holes 52, 52,. , And are provided at the same site. In addition, 65 shown in FIG. 1 is a belt anchor position.

  The reinforcement 70 is integrally fixed to the belt anchor plate 60 and the upper rail 50, so that the wall portion 73 is provided in the vertical direction, and from the upper edge portion of the wall portion 73 to the belt anchor plate 60 side (rightward in FIG. 2). ) And an engaging portion 71 that is bent and extended at a right angle so as to protrude from the lower edge portion of the wall portion 73 toward the belt anchor plate 60 side. And a plurality of projecting pieces 72, 72,... Projecting from the stepped portion 71a at the tip of the engaging portion 71 toward the belt anchor plate 60 side. The length of the reinforcement 70 in the rail direction is substantially the same as the linear portion of the belt anchor plate 60 in the rail direction (the range in which the cross-sectional shape does not change), and is slightly shorter than the linear portion.

A procedure for integrally fixing the reinforcement 70 to the belt anchor plate 60 and the upper rail 50 by welding or the like will be described.
The upper surface of the protruding portion 75 of the reinforcement 70 is pressed against the lower surface of the protruding portion 61 of the belt anchor plate 60, and the upper surface of the engaging portion 71 of the reinforcement 70 is pressed against the lower surface of the protruding portion 51 of the upper rail 50. Hit it. At this time, the relative position of the reinforcement 70 and the belt anchor plate 60 (and the upper rail 50) in the rail direction (front-rear direction; left-right direction in FIG. 1) extends from the tip of the engaging portion 71 of the reinforcement 70. The plurality of protruding pieces 72, 72, and the like that are inserted into the corresponding through holes 52, 52, and the like of the upper rail 50, respectively, It is a position where it can be inserted into the through holes 62, 62,.

  After pressing as described above, the exposed portion of the upper surface of the overhang 75 of the reinforcement 70 and the tip of the overhang 61 of the belt anchor plate 60 are welded. This welded portion is shown as Y2 in FIG. In addition, a plurality of projecting pieces 72, 72, extended from the front end of the engaging portion 71 of the reinforcement 70 project from the plurality of through holes 62, 62, of the belt anchor plate 60. The upper surfaces of,,, are welded to the belt anchor plate 60, respectively. This welded portion is shown as Y1 in FIG.

In this way, the reinforcement 70 is integrally fixed to the belt anchor plate 60 and the upper rail 50, and as shown in FIG. 2, the reinforcement 70 and the belt anchor plate 60 constitute a box-shaped cross-section cylinder. The Therefore, even when a predetermined load determined according to the evaluation test is applied to the seat belt (not shown), the belt anchor plate 60 is prevented from being bent near the center in the rail direction, and the upper rail 50 is peeled off from the lower rail 10. Is also prevented.
Further, at the time of fixing, since only the reinforcement 70 and the belt anchor plate 60 are welded, the warp due to the thermal stress of the welding does not occur at the end portion of the upper rail 50 in the rail direction. There is no rattling or abnormal noise caused by.

The front view which looked at the seat slide device of an embodiment from the reinforcement 70 side. FIG. 2 is a cross-sectional view of the seat slide device of FIG. The perspective view which shows a mode that the reinforcement 70 is attached to the upper rail 50. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Lower rail 11 Lower rail hanging part 12 Lower rail top plate part 13 Lower rail wall part 14 Lower rail bottom part 50 Upper rail 51 Upper rail overhanging parts 52, 52,. Passing hole 56 Upper rail bottom 57 Upper rail upright 60 Belt anchor plate 61 Belt anchor plate overhang 62, 62,... Belt anchor plate through-hole 63 Belt anchor plate wall 65 Seat belt belt anchor position 70 Reinforce (Reinforcing member)
71 Reinforcement engaging portion 71a Reinforcement engaging stepped portions 72, 72,... Reinforced projecting pieces 72a, 72a,... Reinforced projecting piece distal end portion 73 Reinforced wall portion 75 Reinforced Overhang 80 Lock plate 82 Lock hole Y1 Welded part Y2 Welded part

Claims (3)

A seat slide device comprising: a lower rail fixed to a floor surface; an upper rail that is slidably engaged with the lower rail and supports a seat; and a belt anchor plate is attached to the upper rail along the rail direction. Because
The belt anchor plate is integrally fixed along the rail direction, and has a reinforcing member that forms a box-shaped cross-section cylinder together with the belt anchor plate.
A seat slide device characterized by that. In claim 1,
The upper rail includes a projecting portion extending to a side to which the reinforcing member is fixed and a through hole provided at a lower position near the base of the projecting portion in the belt anchor plate mounting range. And
The belt anchor plate has a through hole in a portion corresponding to the through hole of the upper rail in the attached state,
The reinforcing member has an engaging portion that engages with the protruding portion of the upper rail from below in a fixed state, and a protrusion corresponding to the through hole of the upper rail and the belt anchor plate at the tip of the engaging portion. Have a piece,
The engaging portion of the reinforcing member is engaged from the lower side of the protruding portion of the upper rail, and the protruding piece at the tip of the engaging portion is inserted through the through hole of the upper rail and the belt anchor plate to protrude. And then welding the tip to the belt anchor plate.
A seat slide device characterized by that. In claim 2,
The belt anchor plate has an overhang extending to the side on which the reinforcing member is fixed,
The reinforcing member has an overhanging portion that engages with the overhanging portion of the belt anchor plate from below in a fixed state.
The overhanging portion of the reinforcing member and the overhanging portion of the belt anchor plate are welded.
A seat slide device characterized by that.

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