JP2018199351A - Cushion frame and seat for vehicle - Google Patents

Abstract

To provide a cushion frame and a seat for a vehicle which can enhance assembly workability to a base member while being capable of forming a frame member with a complex shape.SOLUTION: The cushion frame constitutes the seat for a vehicle and attached to the base member. The cushion frame comprises a seat belt bracket 15 which is arranged on an upper rail 62 and to which an attachment member 5d of a buckle 5e is attached and an inner bracket 14 which is arranged on the upper rail 62 and is fixed to the seat belt bracket 15. A recess 15b which is formed in recessed upward fashion so as to form a clearance between upper rail 62 and itself is formed on underside of the seat belt bracket 15, and the inner bracket 14 and the seat belt bracket 15 are welded in the recess 15b of the seat belt bracket 15.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a cushion frame and a vehicle seat, and more particularly, to a cushion frame and a vehicle seat including a welded frame member.

  A vehicle seat is generally provided with a seat belt for restricting movement of a seated person when an accident or the like occurs. The seat belt includes a belt-like webbing, a tongue slidably attached to the webbing, a buckle that engages with the tongue, an anchor that fixes an end of the webbing, and the like. In some vehicle seats, a buckle, which is a seat belt constituent member, is attached to a base member (slide rail or floor) via a seat belt bracket.

  Patent Document 1 discloses a seat belt bracket (described as a support frame in the same document) formed by forming a plate material in a bent shape. According to the seat belt bracket disclosed in this document, the number of parts can be reduced by forming the plate material in a bent shape and forming a three-dimensional shape as an integral part.

JP 2008-238931 A

However, since the seat belt bracket described in Patent Document 1 is an integral part formed by bending a plate material, it has been difficult to form a complicated shape such as changing the thickness of only a part thereof. .
On the other hand, when the seat belt bracket is made up of a plurality of parts, the number of parts to be attached to the base member increases, and the assembling work is difficult.

  Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to make it possible to form a seat belt bracket or other frame member having a complicated shape while assembling workability of the frame member to the base member. It is an object to provide a cushion frame and a vehicle seat that can improve the vehicle.

According to the cushion frame of the present invention, the object is a cushion frame that constitutes a vehicle seat and is attached to a base member, the first frame member disposed on the base member, and the base member And a second frame member fixed on the first frame member. The lower surface of the first frame member is recessed upward so as to form a gap with the base member. This is solved by the fact that the first frame member and the second frame member are welded to each other in the recess of the first frame member.
According to the said structure, since a separate connection member is not required for the connection of a 1st frame member and a 2nd frame member, a weight increase can be suppressed and the rigidity of the 1st frame member vicinity can be improved. By forming the recess in the first frame member, the weld bead can be prevented from interfering with the base member, and a compact cushion frame can be obtained. Further, by performing welding in the concave portion, positioning is facilitated, and the weld bead can be easily formed at a predetermined position, so that welding workability is improved. Further, by welding the two parts, a frame member having a complicated shape can be formed, and the workability of assembling to the base member can be improved.

Further, the first frame member is a seat belt bracket to which a seat belt constituent member is attached, the recess formed on the lower surface of the seat belt bracket is a first recess, and the second frame member is The inner bracket is located on the inner side in the seat width direction than the seat belt bracket, and a second recess is formed on the lower surface of the inner bracket so as to form a gap with the base member. It is preferable that the first recess of the seat belt bracket and the second recess of the inner bracket are welded.
According to the said structure, since recessed parts are welded, it becomes easy to position welding and can improve assembly workability | operativity. In addition, the weld bead easily fits in the first recess of the seat belt bracket and the second recess of the inner bracket.

Further, the seat belt bracket and the inner bracket may be welded in a state where the first concave portion and the second concave portion are vertically stacked.
According to the said structure, the rigidity and joining strength of a seatbelt bracket and an inner bracket can be improved because the 1st recessed part and the 2nd recessed part are welded in the state piled up and down.

Moreover, it is preferable when the said recessed part is provided behind the to-be-attached part to which the said seatbelt structural member is attached.
According to the said structure, rigidity can be improved with respect to inputs, such as a rear part collision.

The first frame member preferably includes a bottom wall formed on a lower side and a standing wall flange formed on a rear end portion and formed in a direction intersecting the bottom wall.
According to the said structure, the rigidity of a seatbelt bracket is improved because a seatbelt bracket has a bottom wall and a standing wall flange.

Further, the recess is formed at the center of the lower surface of the first frame member, and at least one of the first frame member and the second frame member is attached to the base member by a bolt, A through hole through which the bolt is passed may be formed on the front side and the rear side of the concave portion in at least one of the first frame member and the second frame member.
According to the said structure, the balance of the rigidity of the front-back direction of the welded 1st frame member and 2nd frame member can be maintained. At least one of the first frame member and the second frame member can be assembled to the base member by the bolt without interfering with the welded portion in the front-rear direction, and assembling workability can be improved.

Moreover, the vehicle seat provided with the said cushion frame may be sufficient.
With the above configuration, the above-described effect can be achieved in the vehicle seat.

According to the present invention, an increase in weight can be suppressed, the rigidity in the vicinity of the first frame member can be improved, the weld bead can be prevented from interfering with the base member, and a compact cushion frame can be obtained. Assembly workability to the member can be improved.
In addition, the weld bead is easily accommodated in the seat belt bracket and the inner bracket.
Moreover, the rigidity and joining strength between the seat belt bracket and the inner bracket can be increased.
Furthermore, rigidity can be improved with respect to an input such as a rear collision.
Moreover, the balance of the rigidity of the welded 1st frame member and 2nd frame member in the front-back direction can be maintained.
In addition, the above effect can be achieved in the vehicle seat.

It is a perspective view of a vehicular seat concerning this embodiment. It is a perspective view of the seat frame which comprises the frame of a vehicular seat. It is a figure which shows the state by which the buckle was attached to a part of seat cushion frame shown in FIG. 2 via the attachment member, Comprising: It is the left side view of the III direction arrow of FIG. It is a top view which shows the attachment state to the member which comprises the other cushion frame about an inner bracket and a seatbelt bracket. It is a perspective view of an inner bracket and a seat belt bracket. It is sectional drawing in the VI-VI cross section of FIG. 3 which shows the fixed state of an inner bracket and a seatbelt bracket. It is a bottom view which shows the attachment state to the seat cushion frame of an inner bracket and a seatbelt bracket.

  Hereinafter, one embodiment (this embodiment) of the present invention will be described with reference to the drawings. The embodiment described below is merely an example for facilitating the understanding of the present invention, and does not limit the present invention. That is, the shape, dimensions, arrangement, and the like of the members described below can be changed and improved without departing from the spirit of the present invention, and the present invention naturally includes equivalents thereof.

Hereinafter, the vehicle seat S will be described as an example of the vehicle seat according to the present embodiment, but the vehicle seat S is only an example for facilitating the understanding of the present invention. The present invention is not limited to this. That is, the seat provided with the frame cover according to the present invention can be applied to a vehicle other than a vehicle, for example, a ship, an aircraft, an industrial machine with a seat, and the like.
In the following description, the front / rear, left / right, and upper / lower directions are the same as those viewed from the seated person of the vehicle seat S.

<< About overall structure >>
First, the overall configuration of the vehicle seat S according to the present embodiment, which is the seat of the present invention, will be mainly referred to FIG. 1, and the seat frame F constituting the skeleton of the vehicle seat S will be mainly referred to FIG. 2. Outline. 1 is a perspective view of a vehicle seat S, and FIG. 2 is a perspective view of a seat frame F. FIG.
The vehicle seat S mainly includes a seat back S1, a seat cushion S2, and a seat belt 5. In addition, the vehicle seat S is configured by placing a cushion material on a seat frame F that forms a skeleton portion and then covering with a skin material. Further, the vehicle seat S includes a slide rail 60 at the lower portion that can slide on the floor 7.

The seat back S1 includes a seat back frame 1 that constitutes a backrest portion that supports the back portion of the seated person and forms a skeleton portion.
The seat cushion S2 constitutes a seat portion that supports a seated person's buttocks, and includes a seat cushion frame 2 as a cushion frame that forms a skeleton portion.
A reclining mechanism 4 is provided at the rear end of the seat cushion S2. The seat back S1 is connected to the seat cushion S2 so that the degree of inclination relative to the seat cushion S2 can be adjusted by a reclining mechanism 4 provided in the seat cushion S2.

As shown in FIG. 2, the seat frame F mainly includes a seat back frame 1 and a seat cushion frame 2. In FIG. 2, the upper portion of the seat back frame 1 is omitted.
The seat cushion frame 2 corresponds to the cushion frame of the present invention, and includes plate frames 25R and 25L provided at the left and right rear ends, the inner bracket 14 and the seat belt bracket 15, a pipe frame 24, Is mainly provided. The seat cushion frame 2 is mounted on the slide rail 60.

The plate frame 25R is formed in a substantially L shape in a side view, and the bracket 6 is attached to the outer side in the seat width direction by bolts and nuts. An anchor 5 c that is a seat belt constituent member is fixed to the bracket 6.
The plate frame 25L is formed in a parallelogram shape when viewed from the side, and the inner bracket 14 is attached by bolts 19a and 19c and a nut 19b at the lower end thereof. The inner bracket 14 and the seat belt bracket 15 are integrally welded, and a buckle 5e is attached to the seat belt bracket 15 via an attachment member 5d described later.

The inner bracket 14 and the seat belt bracket 15 are attached to the slide rail 60. The slide rail 60 includes left and right upper rails 62 and left and right lower rails 63 as main components. The left and right upper rails 62 and the left and right lower rails 63 are spaced apart from each other in the seat width direction and arranged in parallel. The upper rail 62 is slidably attached to the lower rail 63.
The inner bracket 14 and the seat belt bracket 15 are attached to the upper rail 62 of the slide rail 60. The details around the inner bracket 14 will be described later.

  As shown in FIG. 2, the pipe frame 24 is formed in a substantially U shape when viewed from above, and its right rear end is welded to the plate frame 25 </ b> R and its left rear end is welded to the inner bracket 14. Has been configured.

The seat belt 5 includes a belt-like webbing 5a and a tongue 5b attached to the webbing 5a so as to be slidable.
One end of the webbing 5a is fixed by an anchor 5c attached to the bracket 6 of the seat cushion frame 2.
The tongue 5b is held by a buckle 5e attached to the seat cushion frame 2 via an attachment member 5d.
In particular, the attachment member 5d corresponds to a seat belt constituent member according to the present invention.

<< About the structure around the inner bracket and seat bracket >>
A configuration around the inner bracket 14 and the seat belt bracket 15 will be described with reference to FIGS.
3 is a view showing a state in which the buckle 5e is attached to a part of the seat cushion frame 2 shown in FIG. 2 via an attachment member 5d, and is a left side view as viewed in the direction of the arrow III in FIG. FIG. 4 is a plan view showing a state in which the inner bracket 14 and the seat belt bracket 15 are attached to other members constituting the seat cushion frame 2, and FIG. 5 is a perspective view of the inner bracket 14 and the seat belt bracket 15. .
FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG. 3, showing a fixed state of the inner bracket 14 and the seat belt bracket 15, and FIG. 7 is a mounting state of the inner bracket 14 and the seat belt bracket 15 to the seat cushion frame 2. FIG.

  The inner bracket 14 corresponds to a second frame member, and is a member that connects the pipe frame 24 and the plate frame 25L. As shown in FIG. 5, the inner bracket 14 includes a bottom wall 14g, a standing wall 14h, and a holding portion 14i. It is mainly configured and disposed on the slide rail 60.

The bottom wall 14 g is formed at the lower end portion of the inner bracket 14 and is a part connected to the upper rail 62 and the seat belt bracket 15. As shown in FIG. 3 and FIG. 7, in the lower surface center portion of the bottom wall 14 g which is the lower surface center portion of the inner bracket 14, a first recess is formed so as to form a gap with the upper rail 62. A recess 14b is formed as a second recess.
The bottom wall 14g is formed with through holes 14e and 14f penetrating in the plate thickness direction at the front and rear positions sandwiching the recess 14b. As shown in FIG. 6, the through holes 14 e and 14 f are holes for passing bolts 17 a for fastening the inner bracket 14 and the upper rail 62.

  The standing wall 14h is a part connected to the plate frame 25L, and stands upward from the inner edge in the seat width direction of the bottom wall 14g. Of the bolts 19a, 19c and nuts 19b for connecting to the plate frame 25L, through holes 14c for passing the bolts 19a, 19c are formed in the center portion and the rear portion of the standing wall 14h so as to penetrate in the plate thickness direction. Has been.

  The holding portion 14i is a portion that holds the pipe frame 24, is formed continuously on the front side of the standing wall 14h, is formed in a U-shaped cross section so as to cover a part of the pipe frame 24, and is It extends to.

The seat belt bracket 15 corresponds to a first frame member, and is a member to which the attachment member 5d of the buckle 5e is attached. As shown in FIG. 5, the seat belt bracket 15 is formed in a substantially L-shaped cross section and extends in the seat front-rear direction. Is formed. The seat belt bracket 15 is mainly composed of a bottom wall 15g, a standing wall 15h, and a standing wall flange 15d, and is disposed above the slide rail 60.
The seat belt bracket 15 is located on the outer side in the seat width direction than the inner bracket 14 and is placed on the bottom wall 14 g of the inner bracket 14. Further, as shown in FIG. 7, the seat belt bracket 15 is welded to the inner bracket 14 at a portion overlapping the edge portion of the bottom wall 14g of the inner bracket 14 on the lower surface of the bottom wall 15g, which is the lower surface of the seat belt bracket 15. They are joined together.

  The bottom wall 15 g is a part connected to the upper rail 62 and the seat belt bracket 15. As shown in FIGS. 3 and 7, the first lower surface center portion of the bottom wall 15 g, which is the lower surface center portion of the seat belt bracket 15, is formed to be recessed upward along the concave portion 14 b of the inner bracket 14. A recess 15b is formed as a recess.

As shown in FIGS. 6 and 7, the inner bracket 14 and the seat belt bracket 15 are arranged from the lower side at the position where the concave portion 14b and the concave portion 15b overlap with the bottom wall 14g and the bottom wall 15g being overlapped. Welded. Thus, the rigidity and the joining strength between the inner bracket 14 and the seat belt bracket 15 can be increased by welding the recessed portion 14b and the recessed portion 14b in a state where they are stacked one above the other.
The vertical relationship between the bottom wall 14g and the bottom wall 15g, in other words, the vertical relationship between the recess 14b and the recess 15b may be reversed.

Further, through holes 15e and 15f penetrating in the plate thickness direction are formed in the bottom wall 15g at positions in front and rear of the recess 15b and communicating with the through holes 14e and 14f. As shown in FIG. 6, the through hole 15 f is a hole for passing a bolt 17 a for fastening the seat belt bracket 15 and the upper rail 62.
Thus, the through holes 14e, 14f, 15e, and 15f are formed in the inner bracket 14 and the seat belt bracket 15 on the front side and the rear side of the recesses 14b and 15b. By being formed in this way, the balance of the rigidity in the front-rear direction between the welded inner bracket 14 and seat belt bracket 15 can be maintained. Further, the inner bracket 14 and the seat belt bracket 15 can be assembled to the upper rail 62 by the bolts 17a without interfering with the weld bead 16 in the front-rear direction, and the assembling workability can be improved.

  The standing wall 15h is a part connected to the attachment member 5d of the buckle 5e, and stands up from the outer edge of the bottom wall 15g in the seat width direction. As shown in FIG. 5, on the front side of the recessed portion 15b of the standing wall 15h, of the bolt 18a and the nut 18b for connecting to the mounting member 5d, there is a through hole 15c as a mounted portion for passing the bolt 18a. It is formed to penetrate in the thickness direction.

  Further, on the standing wall 15h, on the front side and the upper side of the through hole 15c, a folded piece 15a that is folded back outward in the sheet width direction is formed. The folded piece 15a is disposed on the turning locus of the buckle 5e connected to the standing wall 15h via the mounting member 5d, and restricts the turning range of the buckle 5e so that the occupant can handle the buckle 5e. To make it easier.

  Further, the standing wall flange 15d is continuous with the rear end portion of the bottom wall 15g and the rear end portion of the standing wall 14h, and stands in the seat width direction and extends in a direction crossing the extending direction of both. Yes. The seat belt bracket 15 has a standing wall flange 15d, so that rigidity is enhanced.

  As shown in FIGS. 3 and 5, the recesses 14b and 15b are provided behind the through hole 15c through which the bolt 18a to which the attachment member 5d for attaching the buckle 5e is attached is passed. By being comprised in this way, the rigidity of the inner bracket 14 and the seatbelt bracket 15 with respect to the load input from back can be improved. That is, even if a load is applied to the inner bracket 14 and the seat belt bracket 15 from the rear due to a rear collision or the like on the vehicle, the deformation of the inner bracket 14 and the seat belt bracket 15 can be suppressed.

  In the seat cushion frame 2 according to the above embodiment, the upper rail 62 and the seat belt bracket 15 are connected by welding, and are not connected by separate connecting members. For this reason, an increase in weight due to a separate connecting member can be suppressed, and the rigidity in the vicinity of the seat belt bracket 15 can be improved.

  As described above, the inner bracket 14 and the seat belt bracket 15 are integrally formed by welding the concave portion 14b of the inner bracket 14 and the concave portion 15b of the seat belt bracket 15. Thus, since the recessed parts 14b and 15b are welded, it becomes easy to position welding and can improve assembly workability | operativity. Further, the welding bead 16 fits in the recess 14b of the inner bracket 14 and the recess 15b of the seat belt bracket 15, so that welding workability is improved.

Furthermore, since the recess 15b is also formed in the seat belt bracket 15, it is possible to avoid the weld bead 16 from interfering with the upper rail 62 in place, so that the seat cushion frame 2 can be made compact as a whole. .
Further, by welding the seat belt bracket 15 and the weld bead 16 in the recess 15b, positioning is facilitated and the weld bead 16 is easily formed at a predetermined position, so that welding workability is improved.

  Further, the inner bracket 14 and the seat belt bracket 15 are not formed as a single piece but are divided into two parts and are integrally formed by welding. By being configured in this way, it is possible to improve the assembly workability as compared to separately assembling the two parts to the upper rail 62 while making it possible to form a bracket having a complicated shape.

  Further, in the above embodiment, the description has been made assuming that through holes 14e, 14f, 15e, 15f are formed in both the inner bracket 14 and the seat belt bracket 15 and fixed to the upper rail 62 by the bolts 17a and nuts 17b. This is preferable because the overlapping portion of the inner bracket 14 and the seat belt bracket 15 is attached to the upper rail 62, so that the attachment strength can be increased.

  However, the present invention is not limited to such a configuration, and at least one of the inner bracket 14 and the seat belt bracket 15 may be attached to the upper rail 62. Thus, even if only one of them is attached to the upper rail 62, the inner bracket 14 and the seat belt bracket 15 are integrally formed by welding, so that both members can be attached to the upper rail 62. It becomes.

  Further, the base member to which the inner bracket 14 and the seat belt bracket 15 are attached is not limited to the upper rail 62, but may be another part constituting the seat cushion frame 2, and further, it is the vehicle floor 7. May be.

  Furthermore, although the inner bracket 14 has been described as an example of the frame member welded to the seat belt bracket, it is not limited to the inner bracket 14 and may be another member constituting the seat cushion frame 2.

In the above embodiment, the seat belt bracket 15 and the inner bracket 14 to which the attachment member 5d for attaching the buckle 5e provided on the left side of the vehicle seat S has been described, but the present invention is not limited to such a configuration. .
For example, the vehicle seat S may have the same configuration on the right side, provided with a bracket to which the anchor 5c is attached and an inner bracket.

  Furthermore, in the said embodiment, the welding location of the inner bracket 14 and the seatbelt bracket 15 was demonstrated. However, the present invention is not limited to those relating to welding of these members, and can be widely applied to frame members constituting the seat cushion frame 2.

S Vehicle seat (vehicle seat)
S1 Seat back S2 Seat cushion F Seat frame 1 Seat back frame 2 Seat cushion frame (cushion frame)
5 Seat belt 5a Webbing 5b Tongue 5c Anchor (seat belt component)
5d Mounting member (seat belt component)
5e Buckle 6 Bracket 7 Floor (base member)
14 Inner bracket (second frame member, frame member)
14b Recess (second recess)
14c Through hole 14e, 14f Through hole 14g Bottom wall 14h Standing wall 14i Holding portion 15 Seat belt bracket (first frame member, frame member)
15a Folded piece 15b Concave part (first concave part)
15c Through hole (attached part)
15d Vertical wall flange 15e, 15f Through hole 15g Bottom wall 15h Vertical wall 16 Welded beads 17a, 18a, 19a, 19c Bolts 17b, 18b, 19b Nut 24 Pipe frame 25R, 25L Plate frame 60 Slide rail 62 Upper rail (base member)
63 Lower rail

Claims (7)

A cushion frame that constitutes a vehicle seat and is attached to a base member,
A first frame member disposed on the base member;
A second frame member disposed on the base member and fixed to the first frame member;
On the lower surface of the first frame member, a recess is formed that is recessed upward so as to form a gap with the base member.
The cushion frame, wherein the first frame member and the second frame member are welded to each other in the recess of the first frame member. The first frame member is a seat belt bracket to which a seat belt component is attached;
The recess formed on the lower surface of the seat belt bracket is a first recess;
The second frame member is an inner bracket located on the inner side in the seat width direction than the seat belt bracket,
On the lower surface of the inner bracket, a second recess is formed that is recessed upward so as to form a gap with the base member.
The cushion frame according to claim 1, wherein the first recess of the seat belt bracket and the second recess of the inner bracket are welded.   The cushion frame according to claim 2, wherein the seat belt bracket and the inner bracket are welded in a state where the first recess and the second recess are vertically stacked.   4. The cushion frame according to claim 2, wherein the recess is provided behind a mounted portion to which the seat belt constituent member is mounted.   The first frame member has a bottom wall formed on a lower side and a standing wall flange formed on a rear end portion and in a direction intersecting the bottom wall. 5. The cushion frame according to any one of 4 above. The recess is formed in the center of the lower surface of the first frame member,
At least one of the first frame member and the second frame member is attached to the base member by a bolt,
6. The through hole through which the bolt is passed is formed in a front side and a rear side of the concave portion in at least one of the first frame member and the second frame member. The cushion frame according to Item.   A vehicle seat comprising the cushion frame according to any one of claims 1 to 6.

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