JP7116337B2 - vehicle seat - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat, and more particularly to a vehicle seat provided with a mounting member for mounting a pillar to a seatback.

2. Description of the Related Art Conventionally, vehicle seats having a headrest include those in which the headrest is fixed to the seatback by a mounting member so that the headrest can swing, and those in which the headrest is directly fixed to the seatback so as not to move.
As an example in which a headrest is swingably attached to a seat back by a mounting member, Patent Document 1 discloses a vehicle seat having a structure in which a mounting member having a pillar inserted therein is fixed by fitting it into a frame.
As an example of directly fixing the headrest to the seat back, Patent Document 2 discloses a technique of fixing by welding after inserting a cylindrical pillar into an opening in the upper part of the frame.

Japanese Patent Application Laid-Open No. 2007-269100 Microfilm of Japanese Utility Model Application No. 58-102746 (Japanese Utility Model Application No. 60-10557)

However, in the structure of Patent Document 1, since the portion of the mounting member that holds the pillar and the portion that abuts (fixes) the frame are aligned in the front-rear direction of the seat, a large space is required in the front-rear direction of the seat. I had no choice.
Also, rather than fixing the headrest to the seatback so as to be able to swing, welding may be applied to increase the joint strength. In particular, if the pillar and frame can be joined by laser welding, the joining time can be shortened and the generation of welding heat can be suppressed as compared with arc welding, which is another welding method.
However, the structure of Patent Document 2 is suitable for arc welding but not suitable for laser welding because it is necessary to weld a cylindrical pillar to the frame. That is, since laser welding does not produce a large weld bead unlike arc welding, it is difficult to fix the pillar of the cylindrical member to the frame, and it is difficult to increase the joint strength between the pillar and the frame. rice field.
In addition, the lower end side of the pillar described in Patent Document 2, particularly FIG. 5, protrudes downward from the seat back frame body, and the lower end side of the pillar may come into contact with the pad or skin and damage them. rice field.

SUMMARY OF THE INVENTION An object of the present invention is to reduce the thickness of a vehicle seat in the longitudinal direction of the seat.
Another object of the present invention is to increase the bonding strength between the pillar and the mounting member.
Another object of the present invention is to prevent the pads and skin from being scratched.

According to the vehicle seat of the present invention, a seatback frame, a headrest provided above the seatback frame, a pillar supporting the headrest, and an attachment for attaching the pillar to the seatback frame. a member, wherein the pillar is disposed between the mounting member and the seatback frame, the mounting member including a holding portion that holds the pillar; a fixing portion attached to a frame, wherein the holding portion is formed with an opening, and the portion of the pillar held by the holding portion of the mounting member extends through the opening. The problem is solved by forming a weld bead extending along the extending direction to join the pillar and the mounting member at the edge portion of the opening .

According to the above configuration, the holding portion and the fixing portion of the mounting member are arranged at different positions on the left and right sides of the vehicle seat. A vehicle seat can be thinned in the seat front-rear direction.

Further, the mounting member has two or more mounting members provided at different positions in the lateral direction of the seat, and a connection made of one wire member that connects at least two of the two or more mounting members. A lower cover portion that extends rearward and covers the lower end portion of the pillar from below is provided at the lower end portion of the mounting member, and the connecting member is welded to the lower cover portion. preferably .

The striker member may further include a striker member provided at a position different from the pillar in a direction intersecting the longitudinal direction of the seat, the mounting member having a striker mounting wall portion for mounting the striker member, the striker mounting wall portion It is preferable that the holding portion is positioned on the rear side in the seat front-back direction relative to the holding portion .

The striker member may further include a striker member provided at a position different from the pillar in a direction intersecting the front-rear direction of the seat, the attachment member having a striker attachment wall portion for attaching the striker member, and the fixing portion having the striker. It is preferable that the mounting wall portion is positioned on the rear side in the seat front-rear direction .

The striker member is provided at a position different from the pillar in a direction intersecting the longitudinal direction of the seat. an end positioned forward and welded to the rear face of the mounting member .

Further, the connecting member may be a linear wire member.
According to the above configuration, since the connecting member is a wire member, interference with other members can be suppressed.

ADVANTAGE OF THE INVENTION According to this invention, a vehicle seat can be thinned in the seat front-back direction.
Moreover, according to the present invention, when the pillar and the mounting member are welded together, the joint strength between the pillar and the mounting member can be increased.
Moreover, according to the present invention, it is possible to suppress damage to the pad and the epidermis.
Moreover, according to the present invention, the mounting member and the seat back frame can be quickly welded at the portion where the weld mark is formed.
Moreover, according to the present invention, the rigidity of the mounting members can be increased, and the forward movement of the member between the mounting members can be restricted.
Moreover, it is possible to suppress the connecting member from interfering with other members.

1 is a perspective view showing a vehicle seat set according to a first embodiment of the present invention; FIG. FIG. 2 is a perspective view showing a state in which part of the skin and cushion pad of the vehicle seat set shown in FIG. 1 are removed to expose a seat back frame and the like; It is a perspective view which shows the armrest board attached to a seat back frame. FIG. 3 is a view showing part IV in FIG. 2 and is a perspective view showing a bracket for attaching a headrest frame and the like. FIG. 5 is a view showing the bracket and the striker member from the direction V in FIG. 4, and is a perspective view showing the attached state of the striker member. It is a perspective view showing a bracket.

A configuration of a vehicle seat according to an embodiment of the present invention will be described below. The embodiments described below are intended to facilitate understanding of the present invention, and are not intended to limit the present invention. The present invention can be modified and improved without departing from its spirit, and the present invention includes equivalents thereof.

In the following description, the term "front-rear direction" means the front-rear direction when viewed from a person sitting on the vehicle seat, and is the direction that coincides with the running direction of a general vehicle. "Lateral direction" means the width direction of the vehicle seat. The "height direction" means the height direction of the vehicle seat, and coincides with the vertical direction when the vehicle seat is viewed from the front.

<About the basic configuration of the vehicle seat set>
First, a basic configuration of a vehicle seat set SS including a side seat Sa and a center seat Sb as vehicle seats according to the present embodiment will be described with reference to FIG. FIG. 1 is a perspective view showing a vehicle seat set SS for rear seats according to the first embodiment of the present invention.
The vehicle seat set SS according to the present embodiment has substantially the same configuration in appearance as a general vehicle seat set on which three people can sit, and as shown in FIG. It is composed of a center seat Sb located in the center.

The side seat Sa and the center seat Sb have seat backs S1, S1a and headrests S3, S3a, respectively, and share a seat cushion S2. Further, each of the side seat Sa and the center seat Sb has a skin 2 on its outer surface.
In particular, the seat back S1a of the center seat Sb is provided with an armrest 1 on which the arms of a person seated on the side seat Sa can be placed. is formed.
Specifically, the armrest storage portion 1a is a concave portion formed in the center seat Sb, and the length in the direction along the seat back S1a, which is the substantially vertical direction, is longer than the length in the lateral direction of the seat.
The armrest 1 is attached so as to be rotatable in the front-rear direction about a horizontal shaft that spans the lower side of the armrest storage portion 1a.

<Regarding the internal structure of the side seats and center seat>
Next, mainly referring to FIGS. 2 and 3, the seatback frames 10, 10a and the armrest board 25 provided inside the side seat Sa and the center seat Sb will be described. 2 is a perspective view showing a state in which the seat back frames 10, 10a and the like are exposed by removing a part of the skin 2 and the cushion pad (not shown) of the vehicle seat set SS shown in FIG. 3 is a perspective view showing an armrest board 25 attached to the seat back frame 10a.

The side seat Sa and the center seat Sb include seat back frames 10, 10a functioning as frameworks of the seat backs S1, S1a and headrest frames 20, 20a functioning as frameworks of the headrest S3 to support them.
In particular, a striker member 26, which is shown in FIG. It is A belt (not shown) is attached to the striker member 26, and the belt is fixed or released from the vehicle body so that the vehicle seat set SS can be changed to an upright state or a reclined state. Specifically, the striker member 26 is formed of a single pipe, and has an annular portion 26a formed so as to be attached with a belt (not shown) and both end portions 26b formed adjacent to each other. . With the bracket 21 attached to the upper frame 10b, the striker member 26 is arranged such that the annular portion 26a is arranged on the rear side of the upper frame 10b and both ends 26b are arranged on the front side of the upper frame 10b. It is welded to the rear surface of bracket 21 .

Headrest frames 20, 20a and brackets 21, 22, which will be described later, are joined by arc welding, and upper frames 10b of seat back frames 10, 10a and brackets 21, 22 are joined by laser welding. The method of fixing (joining) the upper frame 10b and the brackets 21 and 22 is not limited to laser welding, and bolts/nuts, tapping screws, caulking pins, or the like may be used.

As shown in FIGS. 2 and 3, an armrest board 25 functioning as a decorative plate for the armrest storage portion 1a is attached to the front side of the seatback frame 10a provided in the center seat Sb.
The armrest board 25 is formed in a plate shape and is attached to the seatback frame 10a so that the short side faces in the lateral direction of the seat and the long side faces in the direction along the seatback S1a, which is the substantially vertical direction.
Specifically, the armrest board 25 includes a body portion 25a, a folded portion 25b that bends and extends forward from the upper end of the body portion 25a, and a bent shape that bends and extends upward from the tip of the folded portion 25b. and a part 25c.

The body portion 25a is positioned to face the rear surface of the armrest 1 when the armrest board 25 is attached to the seatback S1a and the armrest 1 is retracted.
The folded portion 25b is positioned to face the upper surface of the armrest 1 when the armrest board 25 is attached to the seatback S1a and the armrest 1 is retracted.
The bent portion 25c is formed narrower than the main body portion 25a and the folded portion 25b, and is positioned between the two pillars 20b forming the headrest frame 20a when the armrest board 25 is attached to the seat back S1a. located in In the event of a vehicle accident or the like, armrest board 25 is restricted from moving forward of wire member 27 by contacting wire member 27 shown in FIG.

<About the bracket>
Next, brackets 21 and 22 as mounting members for mounting the headrest frames 20 and 20a and the like to the upper frame 10b will be described mainly with reference to FIGS. 4 to 6. FIG. 4 is a view showing the IV part of FIG. 2, and is a perspective view showing the brackets 21 and 22 for mounting the headrest frame 20a. 6 is a perspective view showing a mounting state of the striker member 26, and FIG. 6 is a perspective view showing the bracket 21. FIG.

The brackets 21, 22 are parts for attaching the headrest frames 20, 20a, etc. to the upper frame 10b, as described above. One bracket 21 is attached to one pillar 20b of the headrest frame 20a. On the other hand, a total of five brackets 22 are attached, one to each pillar 20b of the headrest frame 20a and one to each of the two pillars 20b constituting each of the two headrest frames 20a. An end portion of a wire member 27 as a connection member formed in an angular C shape is joined to a lower cover portion 21g, which constitutes each of the bracket 21 and the bracket 22 and will be described later. That is, the bracket 21 and bracket 22 are connected by the wire member 27 .

The wire member 27 is joined to the brackets 21 and 22 so as to be arranged in front of the bent portion 25c of the armrest board 25 when the armrest board 25 and the brackets 21 and 22 are attached to the seat back frame 10a. there is Wire member 27 can limit the movement of armrest board 25 as described above. Further, the wire member 27 connects the lower parts of the brackets 21 and 22 whose upper parts are joined by the headrest frame 20a, so that the joint strength between the brackets 21 and 22 is increased. Since the wire member 27 connecting the brackets 21 and 22 has a small volume, it is preferable in that it can be made lightweight and that interference with other members can be avoided. However, if the effect of increasing the joint strength is desired rather than this effect, the member connecting the brackets 21 and 22 may be a plate-like member instead of a linear member such as a wire.

(Regarding the shape of the bracket)
As shown in FIG. 6, the bracket 21 includes side portions 21a which are formed on both lateral end sides of the seat and are welded to the upper frame 10b, striker mounting wall portions 21b to which the striker members 26 are welded, and pillars 20b. and a lower cover portion 21g that covers the lower end of the pillar 20b from below.

More specifically, the side portions 21a at both ends in the left-right direction of the seat are formed so as to extend on the same plane in the left-right direction of the seat along the front surface of the upper frame 10b. Frame mounting holes 21d for positioning when setting to a laser welding jig are formed at symmetrical positions in the side portions 21a on both end sides.

The striker mounting wall portion 21b is formed continuously from one (left side in FIG. 6) side portion 21a, extends toward the other (right side in FIG. 6) side portion 21a, and extends forward from the side portion 21a. and is formed parallel to the side portion 21a. Both end portions 26b of the striker member 26 are joined to the rear side of the striker mounting wall portion 21b by welding beads 23a formed by arc welding applied from the rear side.

The pillar mounting wall portion 21c functions as a holding portion that holds the pillar 20b together with the weld bead 23, and is formed along the peripheral surface of the pillar 20b. More specifically, the pillar mounting wall portion 21c is formed continuously from the striker mounting wall portion 21b and connected to the other (right side in FIG. 6) side portion 21a. It is formed so as to bulge forward from the mounting wall portion 21b.
In this way, the pillar mounting wall portion 21c is curved in an arcuate cross section so as to follow the peripheral surface of the pillar 20b, thereby forming a weld bead 23 between the pillar 20b and the pillar mounting wall portion 21c. When this is done, the weld bead 23 tends to spread evenly and the bonding strength can be increased.

Also, the pillar mounting wall portion 21c is formed at a different position in the seat lateral direction from the striker mounting wall portion 21b. Therefore, the pillar 20b and the weld bead 23 attached to the pillar attachment wall portion 21c and the striker member 26 and the weld bead 23a attached to the striker attachment wall portion 21b can be prevented from overlapping in the longitudinal direction. Therefore, it is possible to avoid interference in terms of arrangement of these elements, thereby preventing an increase in the thickness of the center seat Sb in the seat front-rear direction. Furthermore, if it is possible to prevent an increase in the thickness of the center seat Sb in the seat front-back direction, the positional relationship between the pillar 20b and the weld bead 23 and the striker member 26 and the weld bead 23a attached to the striker mounting wall portion 21b can be adjusted in the seat left-right direction. Not limited to different positions. For example, different positions in the direction crossing the seat front-rear direction, such as different positions in the seat up-down direction, may be used.

Further, an opening 21e, which is an elongated hole extending in the vertical direction and penetrating in the plate thickness direction, is formed in the vertical central portion of the pillar mounting wall portion 21c. When the pillar 20b is brought into contact with the rear side of the pillar mounting wall portion 21c through the opening 21e, the pillar 20b is exposed to the front side of the bracket 21 through the opening 21e. Then, while the pillar 20b is in contact with the pillar mounting wall portion 21c as described above, the pillar 20b and the edge portion 21f of the opening 21e are arc-welded from the front side of the bracket 21, whereby welding as a holding portion is performed. The bead 23 makes it possible to join the pillar 20b and the bracket 21 together.
The edge portion 21f of the opening 21e is formed so as to be short in the front-rear direction (thickness direction) and extend in the direction along the long-hole-shaped opening 21e (in other words, the direction crossing the front-rear direction). ing. In this manner, the weld bead 23 extends along the opening 21e instead of in the front-rear direction, so that the side seat Sa and the center seat Sb can be made thinner in the seat front-rear direction.

In particular, when the rear surface of the bracket 21 is brought into contact with the upper frame 10b in order to join the bracket 21 and the upper frame 10b by laser welding, the swelling of the weld bead 23 on the front side of the bracket 21 does not interfere. In other words, since the weld bead 23 is not formed on the rear side of the bracket 21, the pillar 20b can be brought into contact with the upper frame 10b. That is, since there is no other member between the pillar 20b and the upper frame 10b, it is possible to make the side seat Sa and the center seat Sb thinner in the front-rear direction.

In general, when the pillar 20b is directly attached to the upper frame 10b, a portion of the upper frame 10b is crushed and the pillar 20b is attached to the crushed portion. In this case, a reduction in the section modulus of the upper frame 10b causes a reduction in rigidity. On the other hand, the bracket 21 according to the present embodiment is formed to have an arcuate cross section and is welded to the pillar 20b without crushing the pillar 20b, so that rigidity does not decrease.
The bracket 21 is formed longer downward than the lower end portion of the pillar 20b, and the lower end side of the pillar mounting wall portion 21c functions as a front cover portion 21h that covers the front of the lower end portion of the pillar 20b. Become. By covering the lower ends of the pillars 20b with the front cover portion 21h in this manner, it is possible to prevent the lower ends of the pillars 20b from rubbing against the cushion pad and the skin 2 (not shown) and damaging them.

The lower cover portion 21g is provided continuously from the lower end of each of the side portions 21a on both left and right direction sides of the seat, the striker mounting wall portion 21b, and the pillar mounting wall portion 21c, and extends rearward by bending therefrom. It is provided so as to cover the lower end of the pillar 20b from below. By covering the lower end portion of the pillar 20b with the lower cover portion 21g in this manner, it is possible to prevent the lower end portion of the pillar 20b from rubbing against the cushion pad and the outer skin 2 (not shown) and damaging them.
The bracket 22 has substantially the same configuration as the bracket 21 except that it is formed smaller in the lateral direction of the seat because of the lack of the striker mounting wall portion 21b of the bracket 21, so detailed description thereof will be omitted.

(Regarding joining by welding)
A pillar 20b on one side of the headrest frame 20a, both ends 26b of the striker member 26, and one side of the wire member 27 are joined to the bracket 21 by welding beads 23, 23a, and 23b formed by arc welding. . The side portion 21a of the bracket 21 and the upper frame 10b are joined by a portion where a C-shaped linear welding mark 24 is formed by laser welding. More specifically, of the portion where the welding mark 24 is formed, the portion on the back side of the side portion 21a melted by laser welding functions as a fixing portion that fixes the bracket 21 and the upper frame 10b. Note that the weld mark 24 is not limited to the C shape, and may be U-shaped or O-shaped. Since the welding marks are formed linearly in this manner, the welding marks can be easily formed by laser welding, and laser welding can be performed quickly and efficiently.
A pillar 20b on the other side of the headrest frame 20a and the other side of the wire member 27 are joined to the bracket 22 by welding beads 23, 23a, and 23b formed by arc welding. The constituent pillars 20b on both sides are joined together.

In particular, in the bracket 21, the pillar mounting wall portion 21c where the weld bead 23 fixed to the pillar 20b is heaped up, and the side portion 21a having the portion where the welding mark 24 is formed and fixed to the upper frame 10b are located on the right and left sides of the seat. It is formed at different positions in the direction. Therefore, the weld bead 23 and the portion where the weld mark 24 is formed do not overlap in the seat longitudinal direction, and an increase in the thickness of the side seat Sa or the center seat Sb in the seat longitudinal direction can be prevented. Further, if the thickness of the side seat Sa or the center seat Sb in the longitudinal direction can be prevented from increasing, the positional relationship between the weld bead 23 and the portion where the weld mark 24 is formed is not limited to different positions in the lateral direction of the seat. , different positions in the vertical direction of the seat, or different positions in the direction intersecting the longitudinal direction of the seat.

In addition, in the side seat Sa, the headrest frame 20 can be reliably and easily fixed to the bracket 22 by the welding bead 23 by arc welding, separately from the seatback frame 10 having a large size. Furthermore, by laser-welding the bracket 22 to the upper frame 10b of the seatback frame 10, the headrest frame 20 can be easily attached to the seatback frame 10 all at once.
Similarly, in the center seat Sb, the headrest frame 20a, the striker member 26 and the wire member 27 are attached to the brackets 21 and 22 by welding beads 23, 23a and 23b by arc welding separately from the seat back frame 10 having a large size. can be securely and easily fixed to the
Furthermore, by laser welding the brackets 21 and 22 to the upper frame 10b of the seatback frame 10a, the headrest frame 20a, the striker member 26 and the wire member 27 can be easily attached to the seatback frame 10a all at once. Become.

In addition, since the pillar 20b is completely sandwiched between the brackets 21, 22 and the seatback frames 10, 10a, the fixability of the pillar 20b is extremely excellent. However, if the structure is such that the sheet is sandwiched without considering the fixing points, the thickness of the sheet increases in the front-rear direction due to the swelling caused by the weld beads 23 and the like for fixing. As a means for solving this problem, a configuration is adopted in which the weld bead 23, which is the holding portion of the pillar 20b, and the portion where the weld mark 24, which is the fixing portion of the seatback frame 10a, are formed are provided at different positions in the left-right direction. As a result, both good fixability and compactness can be achieved.

In the present embodiment, the two brackets 22 of the side seat Sa and the brackets 21 and 22 of the center seat Sb have been described as separate members, but they may be formed integrally. Furthermore, these may be integrally formed and function as a member for restricting the movement of the armrest board 25 like the wire member 27 .
Also, although the brackets 21 and 22 have been described as being attached to the front surface of the upper frame 10b of the seatback frames 10 and 10a, they may be attached to the rear surface. That is, in this case, the pillar 20b and the striker member 26 of the headrest frame 20 are arranged between the rear surface of the upper frame 10b and the brackets 21, 22. As shown in FIG.

In the above embodiment, the seat for the rear seat of the vehicle has been described as an example, but the seat is not limited to the seat for the rear seat as long as the pillar is attached to the seat back frame with a bracket.
Furthermore, although the vehicle seat has been described as an example in the above embodiment, the present invention can be applied not only to vehicles but also to vehicle seats such as aircraft, ships, and industrial machines.

Reference Signs List 1 armrest 1a armrest storage section 2 skins 10, 10a seat back frame 10b upper frames 20, 20a headrest frame 20b pillars 21, 22 bracket (mounting member)
21a side portion 21b striker mounting wall portion 21c pillar mounting wall portion (holding portion)
21d frame attachment hole 21e opening 21f edge portion 21g lower cover portion 21h front cover portion 23 weld bead (holding portion)
23a, 23b Weld bead 24 Weld mark 25 Armrest board 25a Body portion 25b Folded portion 25c Bent shape portion 26 Striker member 26a Annular portion 26b Both ends 27 Wire member (connecting member)
SS Vehicle seat set Sa Side seat (vehicle seat)
Sb center seat (vehicle seat)
S1, S1a seat back S2 seat cushion S3, S3a headrest

Claims (5)

a seat back frame;
a headrest provided above the seat back frame;
a pillar supporting the headrest;
a mounting member for mounting the pillar to the seat back frame,
The pillar is arranged between the mounting member and the seatback frame,
The mounting member has a holding portion that holds the pillar and a fixing portion that is attached to the seatback frame,
An opening is formed in the holding portion,
The opening extends along a direction in which a portion of the pillar held by the holding portion of the mounting member extends,
A vehicle seat, wherein a weld bead for joining the pillar and the mounting member is formed on an edge portion of the opening. The mounting member has two or more mounting members provided at different positions in the lateral direction of the seat,
a connecting member made of one wire member for connecting at least two of the two or more mounting members;
A lower cover portion that extends rearward and covers the lower end portion of the pillar from below is provided at the lower end portion of the mounting member,
2. The vehicle seat according to claim 1, wherein said connecting member is welded to said lower cover portion. further comprising a striker member provided at a position different from the pillar in a direction intersecting the longitudinal direction of the seat;
The mounting member has a striker mounting wall for mounting the striker member,
3. The vehicle seat according to claim 1, wherein the striker mounting wall portion is located on the rear side of the holding portion in the front-rear direction of the seat. further comprising a striker member provided at a position different from the pillar in a direction intersecting the longitudinal direction of the seat;
The mounting member has a striker mounting wall for mounting the striker member,
3. The vehicle seat according to claim 1, wherein the fixing portion is located on the rear side of the striker mounting wall portion in the front-rear direction of the seat. further comprising a striker member provided at a position different from the pillar in a direction intersecting the longitudinal direction of the seat;
The striker member is
an annular portion disposed on the rear side of the seat back frame;
an end portion disposed on the front side of the seatback frame and welded to the rear surface of the mounting member;
3. A vehicle seat according to claim 1 or 2 , comprising:

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