JP5297828B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat in which a seat belt connector is provided on one of left and right sides.

  In general, as described in Patent Document 1 below, a vehicle seat is arranged on a lower frame fixed to the floor of the vehicle, and disposed above the lower frame, and is vertically moved via a coupling mechanism to the lower frame. And an upper frame movably connected to the upper frame. The upper frame is provided with a seat portion on which an occupant sits, and further, a seat back portion is provided at a rear end portion of the seat portion.

  In the vehicle seat thus configured, a seat belt connector is usually attached to one of the left and right sides of the lower frame. The seat belt connector has a plate anchor with a lower end attached to one side of the lower frame and a buckle attached to the upper end of the plate anchor, and the seat belt is detachably connected to the buckle. Is done.

JP-A-11-208328

  On both side portions in the left-right direction of the upper frame, side plate portions with the width direction directed in the up-down direction are provided. In order to improve the strength of the upper frame, the side plate part is desired to have as wide a vertical width as possible. However, the conventional vehicle seat has a problem that it is difficult to increase the width of the side plate portion.

  This problem will be described with reference to FIG. 4. FIG. 4 shows a schematic configuration of one side of a conventional vehicle seat, and reference numeral 1 denotes a slide rail. The slide rail 1 is one of two slide rails that are spaced apart from each other in the left-right direction, and constitutes one side of the lower frame. The slide rail 1 has a lower rail 2 fixed to the floor of the vehicle, and an upper rail 3 provided on the lower rail 2 so as to be movable in the front-rear direction. An upper frame 4 is disposed above the slide rail 1. The upper frame 4 has two side plate portions 4a (only one side plate portion 4a is shown) that are arranged apart from each other in the left-right direction, and a connecting member 4b that connects the side plate portions 4a to each other.

The upper rail 3 is attached with an end portion on the inner side (right side in FIG. 3) of the bracket 5. A seat belt connector 6 is attached to the outer end of the bracket 5. The seat belt connector 6 includes a plate anchor 6a having a lower end attached to the bracket 5 and a buckle attached to the upper end of the plate anchor 6a. A seat belt (not shown) is connected to the buckle. Therefore, the seat belt connector 6 is disposed outside the side plate portion 4 a of the upper frame 4. However, if it arrange | positions in that way, the side-plate part 4a will be located above the bracket 5. FIG. For this reason, if the vertical width of the side plate portion 4a is increased, the side plate portion 4a abuts against the bracket 5 when the upper frame 4 moves downward. For this reason, it is difficult to increase the width of the side plate portion 4a.

  Moreover, in the conventional vehicle seat, since the side plate portion 4a is located between the attachment portion of the bracket 5 to the upper rail 3 and the attachment portion of the seat belt connector 6, the distance between the attachment portions is small. There was a problem that the length of the bracket 5 was reduced and the strength of the bracket 5 was reduced.

In order to solve the above problems, the present invention provides a lower frame, an upper frame disposed above the lower frame and connected to the lower frame so as to be movable in a vertical direction via a connecting mechanism, and the lower frame. A seat belt connector attached to one of the left and right sides of the frame, and the upper frame has side plate portions with the width direction facing up and down on both left and right sides, and the seat belt connector, In a vehicle seat in which a lower end has a plate anchor attached to the one side of the lower frame, and a buckle attached to the upper end of the plate anchor, and a seat belt is connected to the buckle. At least the lower end portion of the one side plate portion arranged on the one side portion side of the lower frame is the lower frame of the plate anchor. The one side plate portion is formed with a through-hole, and the upper end portion of the plate anchor to which the buckle is attached is external to the one side plate portion. The plate anchor is inserted into the through hole so as to be positioned at the position.
In this case, the one side plate portion has a lower plate portion, an intermediate plate portion, and an upper plate portion that are sequentially formed from the lower side to the upper side, and the lower plate portion is attached to the lower frame of the plate anchor. It is arranged outside the location, and is inclined so that the intermediate plate portion goes inward as it goes upward, the upper plate portion is arranged inside the lower plate portion, and the through hole is formed in the intermediate plate portion. It is desirable that it be formed.
It is desirable that the upper plate portion is disposed on the inner side of the attachment position of the plate anchor to the lower frame.
The lower frame has a pair of slide rails that are spaced apart from each other in the left-right direction. It is desirable that the lower end portion of the plate anchor is attached to the upper rail of one slide rail disposed on the one side portion side of the lower frame.
The coupling mechanism has two pairs of links respectively disposed between the left and right upper rails and the left and right side plate portions, and the lower ends of the links are rotatably coupled to the upper rails, respectively. It is desirable that the upper end of each of the two is rotatably connected to the side plate.

  According to the present invention having the above configuration, the plate anchor is inserted into the through hole from the inside to the outside, and the buckle is located outside the side plate portion, so that the seat belt can be connected to the buckle without any problem. it can. Moreover, since the lower end portion of the side plate portion is disposed outside the attachment position of the plate anchor to the lower frame, when the upper frame is moved downward, the side plate portion is attached to the lower frame or the plate anchor to the lower frame. In the case where the part or the plate anchor is attached to the lower frame via the bracket, it does not hit the bracket. Therefore, the vertical width of the side plate portion of the upper frame can be increased, and the strength can be improved. In addition, when the plate anchor is attached to the lower frame via a bracket, the distance in the left-right direction between the attachment position of the bracket to the lower frame and the attachment position of the plate anchor can be shortened, which is very advantageous in terms of strength. become.

FIG. 1 is a side view showing a first embodiment of the present invention. FIG. 2 is a partially omitted enlarged sectional view taken along line XX of FIG. FIG. 3 is a sectional view similar to FIG. 2 showing a second embodiment of the present invention. FIG. 4 is a sectional view similar to FIG. 2 showing a part of a conventional vehicle seat.

The best mode for carrying out the present invention will be described below with reference to the drawings.
1 and 2 show a first embodiment of the present invention. The vehicle seat 10 of this embodiment has a slide rail 11. Although only one slide rail 11 is shown in FIGS. 1 and 2, two slide rails 11 are provided apart from each other in the left-right direction. The slide rail 11 has a lower rail 12 fixed to the floor of the vehicle with the longitudinal direction oriented in the front-rear direction, and an upper that is disposed with the longitudinal direction oriented in the front-rear direction and is movably supported by the lower rail 12 in the front-rear direction. Rail 13. The upper rails 13, 13 of the two slide rails 11, 11 are connected to each other by one or a plurality of connecting members (not shown) so as to move integrally in the front-rear direction. A pair of left and right slide rails 11 and 11 and a connecting member constitute a lower frame. Therefore, the illustrated slide rail 11 constitutes one side portion of the lower frame. The lower frame does not necessarily have such a configuration, and for example, a rectangular plate shape may be adopted, and the lower frame may be provided on the floor of the vehicle so as to be movable in the front-rear direction, or may be fixed. Good.

  An upper frame 21 is disposed above the lower frame (the pair of slide rails 11 and 11 and the connecting member) so as to be movable in the vertical direction. The upper frame 21 is composed of a pair of side plate portions 22 and 22 (only one side plate portion 22 is shown) arranged apart from each other in the left-right direction and one or a plurality of connecting members that integrally connect the pair of side plate portions 22 and 22. 23. The side plate portion 22 is arranged in a state where the longitudinal direction is directed in the front-rear direction and the width direction is directed in the up-down direction. In this embodiment, the connecting member 23 is a rod-like or pipe-like one, but a plate-like one may also be adopted. When the rod-like or pipe-like connecting member 23 is employed, a plurality of connecting members 23 are used. Each connecting member 23 is arranged with its longitudinal direction facing the left-right direction, and the side plate portions 22, 22 are fixed to both ends. Of course, each connecting member 23 is arranged away from each other in the front-rear direction. When the plate-like connecting member 23 is used, the connecting member 23 is disposed substantially horizontally, and the side plate portions 22 and 22 are fixed to the left and right side portions, respectively. In the case where the connecting member 23 is used, the connecting member 23 and the side plate portions 22 and 22 may be integrally formed.

  The side plate portions 22 and 22 are coupled to the upper rails 11 and 11 by a coupling mechanism 31 so as to be movable in the vertical direction. The coupling mechanism 31 has a pair of links 32 and 33 on the left side and a pair of links 32 and 33 on the right side. The pair of links 32 and 33 are disposed between the upper rail 13 and the side plate portion 22 located on the same side in the left-right direction, and the lower end portions of the links 31 and 32 extend to the upper rail 13 in the left-right direction. It is connected so as to be rotatable about a horizontal axis. The upper ends of the links 31 and 32 are connected to the side plate 22 so as to be rotatable about a horizontal axis extending in the left-right direction. Thereby, the side plate part 22 is connected to the upper rail 11 so as to be movable in the vertical direction, and the upper frame 21 is connected to the lower frame so as to be movable in the vertical direction. The range of movement of the upper frame 21 in the vertical direction is limited between a predetermined upper limit position and a lower limit position.

  The pair of links 32 and 33 have the same length (the same center-to-center distance). Therefore, the four-bar link mechanism constituted by the upper rail 11, the pair of links 32 and 33, and the side plate portion 22 is a parallel link mechanism. Of course, the length of the pair of links 32 may be different. Moreover, you may arrange | position a pair of links 32 and 33 so that it may mutually cross | intersect, when it sees from the left-right direction so that it may be employ | adopted in the well-known vehicle seat.

  A biasing mechanism that biases the upper frame 21 upward is provided between the lower frame and the upper frame 21. In this embodiment, the urging mechanism is composed of only one suspension spring 41. The suspension spring 41 is formed of a tension coil spring and is disposed in a state inclined in the direction opposite to the links 32 and 33. One end of the suspension spring 41 is connected to the upper rail 13 that is a lower frame, and the other end is connected to the upper frame 21. Therefore, the suspension spring 41 always urges the upper frame 21 upward. As the urging mechanism, for example, those described in Patent Document 1 and various other well-known ones can be adopted.

  The upper frame 21 is provided with a seat portion 51 for an occupant to sit on. The seat part 51 has a seat frame and a seat cushion (both not shown). The seat frame is fixed to the upper frame 21. Therefore, the seat frame may be provided integrally with the upper frame 21. A lower end portion of the seat back portion 52 is rotatably supported by a rear end portion of the seat portion 51 via a reclining hinge 53. A headrest portion 54 is provided at the upper end portion of the seat back portion 52.

  A bracket 61 is attached to a rear end portion of one of the two upper rails 13 and 13 (in this embodiment, the upper rail 13 disposed on the right side when viewed from the front). The bracket 61 is attached to the upper surface of the upper rail 13, but may be attached to a side surface facing the outer side (left side in FIG. 2) of the upper rail 13. In the present invention, “inner side” means the center side of the vehicle seat 1, and “outer side” means the side away from the center of the vehicle seat 1.

A seat belt connector 71 is attached to the outer side surface of the bracket 61. The seat belt connector 71 includes a plate anchor 72 and a buckle 73. As is well known, the plate anchor 72 is formed by knitting a metal plate or hard resin fiber into a band shape. In this embodiment, the plate anchor 72 extends in the vertical direction except for a bent portion bent in two stages. ing. The lower end portion of the plate anchor 72 is connected to the side surface facing the outside of the bracket 61 so as to be rotatable about a horizontal axis extending in the left-right direction. Therefore, the upper end portion of the plate anchor 72 is movable in the front-rear direction by rotating around the lower end portion. The lower end portion of the plate anchor 72 may be directly attached to the upper rail 13. The buckle 73 is made of metal and is attached to the upper end of the plate anchor 72. A seat belt (not shown) is detachably connected to the buckle 73.

As shown in FIG. 2, the side plate portion 22 includes a lower plate portion 22a, an intermediate plate portion 22b, and an upper plate portion 22c that are sequentially formed from the lower side toward the upper side. The lower plate portion 22a is arranged with its longitudinal direction facing the front-rear direction and its width direction facing the up-down direction. In addition, the lower plate portion 22 a is disposed outside the bracket 61 as well as the position where the plate anchor 72 is attached to the bracket 61. Therefore, the lower plate portion 22a does not hit the bracket 61, the plate anchor 72, and their attachment locations when the upper frame 21 moves downward. Therefore, in this embodiment, when the upper frame 21 is moved to the lower limit position, the lower plate portion 22a is disposed so that the lower end portion is located slightly below the bracket 61.

The intermediate plate portion 22b is integrally connected to the upper end portion of the lower plate portion 22a, and is inclined so as to go inward as it goes upward. The intermediate plate portion 22b may be formed substantially horizontally.

The upper plate portion 22c is disposed with its longitudinal direction facing the front-rear direction and its width direction facing the vertical direction, and is integrally connected to the upper end portion of the intermediate plate portion 22b. Therefore, the upper plate part 22c is located inside the lower plate part 22a. In particular, in this embodiment, the plate anchor 72 is disposed so as to be located on the inner side of the attachment portion of the plate anchor 72 to the bracket 61, that is, on the outer side surface of the bracket 61. One end of the connecting member 23 is connected and fixed to the upper plate portion 22c.

The intermediate plate portion 22b is formed with a through hole 22d penetrating vertically. As shown in FIG. 1, the through-hole 22d is formed as a long hole having a predetermined length in the front-rear direction. The through hole 22d may be inclined so as to go upward as it goes outward.

A portion of the plate anchor 72 above the bent portion is inserted into the through hole 22d. The plate anchor 72 is movable in the longitudinal direction of the plate anchor 72 with respect to the through hole 22d. Therefore, the plate anchor 72 does not hinder the movement of the upper frame 21 in the vertical direction. The plate anchor 72 is inserted into the through hole 22d so as to be movable in the longitudinal direction. Therefore, the plate anchor 72 can be rotated in the front-rear direction by the difference between the width and the length in the front-rear direction of the through hole 22d, so that the buckle 73 can be moved in the front-rear direction.

Since the plate anchor 72 is inserted into the through hole 22d, the portion of the plate anchor 72 below the through hole 22d is located inside the lower plate portion 22a of the side plate portion 22. However, the portion of the plate anchor 72 above the through hole 22d and the buckle 73 are located outside the upper plate portion 22c of the side plate portion 22, and are exposed to the outside from the side plate portion 22. Therefore, the seat belt can be connected to the buckle 73 without any problem without the side plate portion 22 and the like getting in the way.

  In the vehicle seat 1 having the above configuration, the buckle 73 is disposed outside the side plate portion 22 by the plate anchor 72 being inserted into the through hole 22d. That is, the members constituting the sheet 10 such as the side plate 22 can be easily connected without obstructing the connection.

Further, since the lower plate portion 22a of the side plate portion 22 is disposed outside the bracket 61 and the attachment position of the plate anchor 72 to the bracket 61, when the upper frame 21 moves to the lower limit position, the bracket 61 or There is no contact with the mounting location of the plate anchor 72. Therefore, the vertical width of the side plate portion 22 is maximized until the lower end portion of the side plate portion 22 (lower end portion of the lower plate portion 22a) contacts the floor portion of the vehicle when the upper frame 21 moves to the lower limit position. Can be expanded downward. Thereby, the intensity | strength of the side-plate part 22 can be improved.

  Furthermore, since the attachment location of the plate anchor 72 to the bracket 61 is disposed inside the lower plate portion 22a of the side plate portion 22, the attachment location can be brought close to the attachment location of the bracket 61 to the upper rail 13. . Therefore, the strength reduction of the bracket 61 can be prevented.

In addition, this invention is not limited to said embodiment, In the range which does not deviate from the summary, various embodiment can be employ | adopted.
For example, in the above-described embodiment, the plate anchor 72 is bent in two stages at its longitudinal intermediate portion. However, as shown in FIG. It may be formed straight.
Moreover, in said embodiment, although arrange | positioned so that the upper board part 22c of the side board part 22 may be located inside the attachment location to the bracket of the plate anchor 72 to 61, it arrange | positions outside the said attachment location. May be. Alternatively, the entire side plate portion 22 may be formed in a flat plate shape with the width direction directed in the up-down direction, and the entire side plate portion 22 may be disposed outside the attachment location of the plate anchor 72 to the bracket 61.

10 Vehicle seat 11 Slide rail (lower frame)
12 Lower rail 13 Upper rail 21 Upper frame 22 Side plate portion 22a Lower plate portion 22b Intermediate plate portion 22c Upper plate portion 22d Through hole 31 Connecting mechanism 32 Link 33 Link 61 Bracket 71 Seat belt connector 72 Plate anchor 73 Buckle

Claims (5)

A lower frame, an upper frame disposed above the lower frame and coupled to the lower frame via a coupling mechanism so as to be movable in the vertical direction, and attached to one of the left and right sides of the lower frame A seat belt connector, wherein the upper frame has side plate portions in the left and right side portions with the width direction directed vertically, and the seat belt connector has a lower end portion on the one side portion of the lower frame. In a vehicle seat having an attached plate anchor and a buckle attached to an upper end portion of the plate anchor, and a seat belt is connected to the buckle.
The one side plate is disposed so that at least a lower end portion of the one side plate portion arranged on the one side portion side of the lower frame is positioned outside an attachment portion of the plate anchor to the lower frame, and the one side plate The plate anchor is inserted into the through hole so that a through hole is formed in the portion and the upper end portion of the plate anchor to which the buckle is attached is located outside the one side plate portion. A vehicle seat characterized by the above.   The one side plate portion has a lower plate portion, an intermediate plate portion, and an upper plate portion that are sequentially formed from the lower side to the upper side, and the lower plate portion is located outside the attachment position of the plate anchor to the lower frame. The intermediate plate portion is inclined so as to go inward as it goes upward, the upper plate portion is arranged inside the lower plate portion, and the through hole is formed in the intermediate plate portion. The vehicle seat according to claim 1, wherein:   The vehicle seat according to claim 2, wherein the upper plate portion is disposed on an inner side than an attachment position of the plate anchor to the lower frame.   The lower frame has a pair of slide rails that are spaced apart from each other in the left-right direction, and the slide rail can be moved in the front-rear direction with respect to the lower rail that is disposed with the longitudinal direction oriented in the front-rear direction. The lower rail of the plate anchor is attached to the upper rail of one slide rail disposed on the one side of the lower frame. The vehicle seat according to any one of 1 to 3.   The coupling mechanism has two pairs of links respectively disposed between the left and right upper rails and the left and right side plate portions, and the lower ends of the links are rotatably coupled to the upper rails, respectively. 5. The vehicle seat according to claim 4, wherein upper end portions of the vehicle body are rotatably connected to the side plate portions.

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