JP6993560B2 - Cushion frame and vehicle seat - Google Patents

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.

Vehicle seats are generally equipped with seat belts for restricting the movement of seated persons in the event of an accident or the like. The seat belt consists of a band-shaped webbing, a tongue slidably attached to the webbing, a buckle that engages with the tongue, an anchor that secures the end of the webbing, and the like. In addition, some vehicle seats have a buckle, which is a seatbelt component, attached to a base member (slide rail or floor) via a seatbelt bracket.

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

Japanese Unexamined Patent Publication No. 2008-23931

However, since the seatbelt bracket described in Patent Document 1 is an integral part formed by bending a plate material, it is difficult to make a complicated shape such as making only a part of the seatbelt bracket have a different thickness. ..
On the other hand, when the seatbelt bracket is made into a plurality of parts, the number of places to be attached to the base member increases, which makes the assembling work 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 seatbelt bracket or other frame member having a complicated shape, and to have workability in assembling the frame member to the base member. It is to provide a cushion frame and a vehicle seat which can improve.

According to the cushion frame of the present invention, the subject is a cushion frame that constitutes a vehicle seat and is attached to a base member, and is a first frame member disposed on the base member and the base member. A second frame member arranged above and fixed to the first frame member is provided, the first frame member is a seatbelt bracket to which a seatbelt component member is attached, and the second frame member is It is an inner bracket located inside the seat belt bracket in the seat width direction, and a recess formed by being recessed upward so as to form a gap between the first frame member and the base member is formed on the lower surface of the first frame member. It is formed, and the problem is solved by welding the first frame member and the second frame member in the recess of the first frame member.
According to the above configuration, since a separate connecting member is not required for connecting the first frame member and the second frame member, it is possible to suppress an increase in weight and improve the rigidity in the vicinity of the first frame member. Since the recess is formed in the first frame member, it is possible to prevent the weld bead from interfering with the base member and to make a compact cushion frame. Further, by performing welding in the concave portion, positioning is facilitated and the weld bead is easily formed at a predetermined position, so that the welding workability is improved. Further, by welding the two parts, a frame member having a complicated shape can be formed, and the workability for assembling to the base member can be improved.

Further, the recess formed on the lower surface of the seatbelt bracket is the first recess, and is formed on the lower surface of the inner bracket by being recessed upward so as to form a gap between the inner bracket and the base member. It is preferable that the second recess is formed, and the first recess of the seatbelt bracket and the second recess of the inner bracket are welded together.
According to the above configuration, since the recesses are welded to each other, the welding can be easily positioned and the assembly workability can be improved. Further, the weld bead can be easily fitted in the first recess of the seat belt bracket and the second recess of the inner bracket.

Further, the seatbelt bracket and the inner bracket may be welded in a state where the first recess and the second recess are vertically overlapped with each other.
According to the above configuration, since the first recess and the second recess are welded in a state of being overlapped vertically, the rigidity and the joint strength between the seatbelt bracket and the inner bracket can be increased.

Further, it is preferable that the recess is provided behind the attached portion to which the seatbelt constituent member is attached.
According to the above configuration, the rigidity can be improved against an input such as a rear collision.

Further, it is preferable that the first frame member has a bottom wall formed on the lower side and a standing wall flange formed on the rear end portion and formed in a direction intersecting the bottom wall.
According to the above configuration, the seatbelt bracket has the bottom wall and the standing wall flange, so that the rigidity of the seatbelt bracket is increased.

Further, the recess is formed in the center of the lower surface of the first frame member, and is attached to at least one of the first frame member and the second frame member by a bolt to the base member. Through holes for passing the bolts may be formed on the front side and the rear side of the recesses in at least one of the first frame member and the second frame member.
According to the above configuration, it is possible to maintain a balance of rigidity in the front-rear direction between the welded first frame member and the second frame member. At least one of the first frame member and the second frame member can be assembled to the base member by bolts without interfering with the welded portion in the front-rear direction, and the assembly workability can be improved.

Further, it may be a vehicle seat provided with the cushion frame.
With the above configuration, the above effect can be obtained in the vehicle seat.

According to the present invention, the weight increase 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. It is possible to improve the workability of assembling to a member.
In addition, the weld bead can be easily fitted to the seat belt bracket and the inner bracket.
In addition, the rigidity and joint strength between the seat belt bracket and the inner bracket can be increased.
Further, the rigidity can be improved against an input such as a rear collision.
Further, it is possible to maintain a balance of rigidity in the front-rear direction between the welded first frame member and the second frame member.
Further, the above effect can be obtained in the vehicle seat.

It is a perspective view of the vehicle seat which concerns on this embodiment. It is a perspective view of the seat frame which forms the skeleton of a vehicle seat. FIG. 2 is a view showing a state in which a buckle is attached to a part of the seat cushion frame shown in FIG. 2 via an attachment member, and is a left side view of FIG. 2 in the direction of arrow III. It is a top view which shows the mounting state of the inner bracket and the seat belt bracket to the member constituting another cushion frame. It is a perspective view of the inner bracket and the 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 seat belt bracket. It is a bottom view which shows the mounting state of the inner bracket and the seat belt bracket to the seat cushion frame.

Hereinafter, an embodiment of the present invention (the present embodiment) will be described with reference to the drawings. It should be noted that the embodiments described below are merely examples for facilitating the understanding of the present invention, and do not limit the present invention. That is, the shapes, dimensions, arrangements, and the like of the members described below can be changed and improved without departing from the spirit of the present invention, and it goes without saying that the present invention includes equivalents thereof.

Further, in the following description, 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. That is, the seat provided with the frame cover according to the present invention can be applied to vehicles other than vehicles, and can be applied to, for example, ships, aircraft, industrial machines with seats, and the like.
Further, in the following, each direction of front / rear, left / right, and up / down coincides with each direction seen from the seated person of the vehicle seat S.

<< About the overall configuration >>
First, with reference to FIG. 1 mainly for the overall configuration of the vehicle seat S according to the present embodiment, which is the seat of the present invention, and mainly with reference to FIG. 2 for the seat frame F forming the skeleton of the vehicle seat S. Outline. FIG. 1 is a perspective view of a vehicle seat S, and FIG. 2 is a perspective view of a seat frame F.
The vehicle seat S is mainly composed of a seat back S1, a seat cushion S2, and a seat belt 5. Further, the vehicle seat S is configured by placing a cushion material on the seat frame F forming the skeleton portion and then covering it with a skin material. Further, the vehicle seat S is provided with a slide rail 60 slidable with respect to the floor 7 at the lower portion.

The seat back S1 has 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 has a seat cushion frame 2 as a cushion frame that constitutes a seat portion that supports the buttocks of the seated person and 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 the reclining mechanism 4 provided on the seat cushion S2.

As shown in FIG. 2, the seat frame F is mainly composed of a seat back frame 1 and a seat cushion frame 2. In FIG. 2, the upper part 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 rear ends on both left and right sides, an inner bracket 14, a seatbelt bracket 15, a pipe frame 24, and the like. Mainly prepared for. 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 a bracket 6 is attached to the outside in the seat width direction by bolts and nuts. An anchor 5c, which is a seatbelt component, is fixed to the bracket 6.
The plate frame 25L is formed in a side view parallel four-sided shape, and an inner bracket 14 is attached to the inner bracket 14 by bolts 19a, 19c and nuts 19b at the lower end thereof. The inner bracket 14 and the seatbelt bracket 15 are integrally welded, and the buckle 5e is attached to the seatbelt bracket 15 via the 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 a main configuration. The left and right upper rails 62 and the left and right lower rails 63 are arranged in parallel so as to be separated from each other in the seat width direction. The upper rail 62 is slidably attached to the lower rail 63.
The inner bracket 14 and the seatbelt 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 in top view, its right rear end is welded to the plate frame 25R, and its left rear end is welded to the inner bracket 14. It is composed of.

The seat belt 5 includes a band-shaped webbing 5a and a tongue 5b slidably attached to the webbing 5a.
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 the attachment member 5d.
In particular, the mounting member 5d corresponds to the seatbelt component according to the present invention.

<< About the configuration around the inner bracket and seat bracket >>
The configuration around the inner bracket 14 and the seatbelt bracket 15 will be described with reference to FIGS. 3 to 7.
FIG. 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 the attachment member 5d, and is a left side view of FIG. 2 in the direction of arrow III. FIG. 4 is a plan view showing the mounting state of the inner bracket 14 and the seatbelt bracket 15 to other members constituting the seat cushion frame 2, and FIG. 5 is a perspective view of the inner bracket 14 and the seatbelt bracket 15. ..
FIG. 6 is a cross-sectional view taken along the VI-VI cross section of FIG. 3, showing a fixed state of the inner bracket 14 and the seatbelt bracket 15, and FIG. 7 is a state in which the inner bracket 14 and the seatbelt bracket 15 are attached to the seat cushion frame 2. It is a bottom view which shows.

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. It is mainly configured and is arranged on the slide rail 60.

The bottom wall 14g is formed at the lower end of the inner bracket 14 and is a portion connected to the upper rail 62 and the seatbelt bracket 15. As shown in FIGS. 3 and 7, the lower central portion of the bottom wall 14 g, which is the central portion of the lower surface of the inner bracket 14, is formed by being recessed upward so as to form a gap between the inner bracket 14 and the upper rail 62. A recess 14b is formed as the recess of 2.
Further, the bottom wall 14g is formed with through holes 14e and 14f penetrating in the plate thickness direction at front and rear positions sandwiching the recess 14b. As shown in FIG. 6, the through holes 14e and 14f are holes for passing bolts 17a for fastening the inner bracket 14 and the upper rail 62.

The standing wall 14h is a portion connected to the plate frame 25L, and stands above the inner edge of the bottom wall 14g in the sheet width direction. Of the bolts 19a and 19c for connecting to the plate frame 25L and the nuts 19b, through holes 14c for passing the bolts 19a and 19c are formed in the central portion and the rear portion of the vertical wall 14h in the plate thickness direction. Has been done.

The holding portion 14i is a portion for holding the pipe frame 24, is continuously formed on the front side of the vertical wall 14h, is formed in a U-shaped cross section so as to cover a part of the pipe frame 24, and is formed in the front-rear direction. It is extended to.

The seat belt bracket 15 corresponds to the first frame member, and is a member to which the mounting member 5d of the buckle 5e is mounted. As shown in FIG. 5, the seat belt bracket 15 is formed in a substantially L-shaped cross section and extends in the front-rear direction of the seat. It is and is formed. The seatbelt bracket 15 is mainly composed of a bottom wall 15g, a standing wall 15h, and a standing wall flange 15d, and is arranged above the slide rail 60.
Further, the seat belt bracket 15 is located outside the inner bracket 14 in the seat width direction, and is placed on the bottom wall 14 g of the inner bracket 14. Further, as shown in FIG. 7, the seatbelt 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 seatbelt bracket 15. It is integrally joined.

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

As shown in FIGS. 6 and 7, the inner bracket 14 and the seatbelt bracket 15 are in a state where the bottom wall 14 g and the bottom wall 15 g are overlapped, and the recess 14b and the recess 15b overlap each other from the lower side. It is welded. As described above, the recesses 14b and the recesses 14b are welded in a vertically stacked state, so that the rigidity and the joint strength between the inner bracket 14 and the seatbelt bracket 15 can be increased.
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, the bottom wall 15g is formed with through holes 15e and 15f penetrating in the plate thickness direction at front and rear positions sandwiching the recess 15b and at positions communicating with the through holes 14e and 14f. As shown in FIG. 6, the through hole 15f is a hole for passing a bolt 17a for fastening the seat belt bracket 15 and the upper rail 62.
As described above, the inner bracket 14 and the seatbelt bracket 15 are formed with through holes 14e, 14f, 15e, 15f on the front side and the rear side of the recesses 14b, 15b. With this formation, it is possible to maintain a balance of rigidity in the front-rear direction between the welded inner bracket 14 and the seatbelt bracket 15. Further, the inner bracket 14 and the seatbelt bracket 15 can be assembled to the upper rail 62 by the bolt 17a without interfering with the weld bead 16 in the front-rear direction, and the assembly workability can be improved.

The standing wall 15h is a portion connected to the mounting member 5d of the buckle 5e, and stands upward from the outer edge of the bottom wall 15g in the seat width direction. As shown in FIG. 5, among the bolts 18a and nuts 18b for connecting to the mounting member 5d, a through hole 15c as a mounted portion for passing the bolt 18a is provided on the front side of the vertical wall 15h in front of the recess 15b. It is formed through the thickness direction.

Further, on the front side and the upper side of the through hole 15c in the standing wall 15h, a folded piece 15a folded outward in the seat width direction is formed. The folded piece 15a is arranged on the rotation locus of the buckle 5e connected to the vertical wall 15h via the mounting member 5d, and limits the rotation range of the buckle 5e to handle the occupant's buckle 5e. It makes it easy.

Further, the vertical wall flange 15d is continuous with the rear end portion of the bottom wall 15g and the rear end portion of the vertical wall 14h, and is erected in the seat width direction and extends in a direction intersecting the extending directions of both. There is. The seatbelt bracket 15 has a vertical wall flange 15d, so that the rigidity is increased.

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 mounting member 5d for mounting the buckle 5e is mounted is passed. With such a configuration, the rigidity of the inner bracket 14 and the seatbelt bracket 15 with respect to the load input from the rear can be improved. That is, even if a load is applied to the inner bracket 14 and the seatbelt bracket 15 from the rear due to a rear collision or the like with the vehicle, the deformation of the inner bracket 14 and the seatbelt 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. Therefore, it is possible to suppress the weight increase due to the separate connecting member, and it is possible to improve the rigidity in the vicinity of the seatbelt bracket 15.

As described above, the recess 14b of the inner bracket 14 and the recess 15b of the seatbelt bracket 15 are welded to each other, so that the inner bracket 14 and the seatbelt bracket 15 are integrally formed. Since the recesses 14b and 15b are welded to each other in this way, the welding can be easily positioned and the assembly workability can be improved. Further, the welding bead 16 is fitted in the recess 14b of the inner bracket 14 and the recess 15b of the seatbelt bracket 15, so that the welding workability is improved.

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

Further, the inner bracket 14 and the seatbelt bracket 15 are not integrally formed, but are separately composed of two parts, and are integrally formed by welding. With such a configuration, it is possible to form a bracket having a complicated shape, and it is possible to improve the assembling workability as compared with assembling the two parts separately to the upper rail 62.

Further, in the above embodiment, it has been described that through holes 14e, 14f, 15e, 15f are formed in both the inner bracket 14 and the seatbelt bracket 15 and fixed to the upper rail 62 by bolts 17a and nuts 17b. By doing so, the overlapping portion of the inner bracket 14 and the seatbelt bracket 15 is attached to the upper rail 62, so that the attachment strength can be increased, which is preferable.

However, the present invention is not limited to such a configuration, and only at least one of the inner bracket 14 and the seatbelt bracket 15 may be attached to the upper rail 62. In this way, even if only one of them is attached to the upper rail 62, since the inner bracket 14 and the seatbelt bracket 15 are integrally formed by welding, both members can be attached to the upper rail 62. Will be.

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

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

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

Further, in the above embodiment, the welded portion between the inner bracket 14 and the seatbelt bracket 15 has been described. However, the present invention is not limited to those relating to welding of these members, and can be widely applied to the 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 part 15 Seat belt bracket (1st frame member, frame member)
15a Folded piece 15b Recess (first recess)
15c through hole (attached part)
15d Standing wall flange 15e, 15f Through hole 15g Bottom wall 15h Standing wall 16 Welded beads 17a, 18a, 19a, 19c Bolts 17b, 18b, 19b Nuts 24 Pipe frame 25R, 25L Plate frame 60 Slide rail 62 Upper rail (base member)
63 Lower rail

Claims (8)

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
A second frame member disposed on the base member and fixed to the first frame member.
The first frame member is a seatbelt bracket to which a seatbelt component is attached.
The second frame member is an inner bracket located inside the seat belt bracket in the seat width direction.
On the lower surface of the first frame member, a recess formed by being recessed upward so as to form a gap with the base member is formed.
A cushion frame characterized in that the first frame member and the second frame member are welded to each other in the recess of the first frame member. The recess formed on the lower surface of the seat belt bracket is the first recess.
On the lower surface of the inner bracket, a second recess formed by being recessed upward so as to form a gap between the inner bracket and the base member is formed.
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 to each other. 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 overlapped with each other. The cushion frame according to claim 2 or 3, wherein the recess is provided behind the attached portion to which the seatbelt constituent member is attached. The first frame member is characterized by having a bottom wall formed on the lower side and a standing wall flange formed on the rear end portion and formed in a direction intersecting the bottom wall. The cushion frame according to any one of 4. 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 bolts.
One of claims 1 to 5, wherein through holes through which the bolts are passed are formed on the front side and the rear side of the recesses in at least one of the first frame member and the second frame member. Cushion frame as described in the section. A vehicle seat comprising the cushion frame according to any one of claims 1 to 6. The cushion frame according to any one of claims 1 to 6 and the cushion frame.
The reclining mechanism provided at the rear end of the cushion frame and
A seat back frame that is connected to the reclining mechanism and forms a skeleton portion that constitutes a backrest portion that supports the back of the seated person.
A slide rail provided at the bottom of the cushion frame and slidably connected to the floor,
It is provided with a headrest provided on the upper part of the seat back frame and supporting the head of the seated person.
A vehicle seat characterized in that a cushion material is placed on a seat frame composed of the cushion frame and the seat back frame and then covered with a skin material.

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