JP2002127800A - Seat back structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the structure of a seat back, in which the number of parts is reduced and the fitting strength of each part is improved by fixing an armrest and a tether anchor to a seat back body with a single fixture. SOLUTION: On the front of the seat back 5 comprising a vehicle seat 1, the armrest 11 is arranged via a bracket 63 having a bolt 65, and the bolt 65 is extended to the back of the seat back 5, to which a holder 35 for the tether anchor 17 is fixed. The seat back 5 has a recessed part 9 and 25 each on the front on the back, into which the armrest 11 and the tether anchor are housed, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an automobile seat back, and more particularly, to a structure of a seat back having an armrest capable of being stored on a front surface and a tether anchor on a rear surface thereof.

[0002]

2. Description of the Related Art As shown in FIG.
The seat back 103 constituting the seat back 01 has a type in which an armrest 107 is supported on a front surface of a seat back body 105 so as to be capable of falling, and a tether anchor (not shown) is provided on a back surface of the seat back body 105. is there. This tether anchor is configured so that an auxiliary band for attaching a child restraint system (CRS) can be attached thereto. Further, in a state where the seat back 103 is tilted forward, luggage and the like can be placed on the back of the seat back 103 and fixed with a rope, a net, or the like. It is also possible to fix it.

[0003]

However, since the above-mentioned armrest 107 and tether anchor are separately mounted on the seat back body 105, fixing of the bolts and nuts used for mounting the armrest 107 and the tether anchor is performed. Tools, reinforcing members, and the like are required separately, resulting in an increase in the number of parts.

[0004] The present invention solves the above-mentioned problems, and reduces the number of parts by attaching the armrest and the tether anchor to the seatback body by a common fixing tool and serving as reinforcing plates. It is an object of the present invention to provide a seat back structure capable of improving the mounting strength.

[0005]

In order to achieve the above object, in the structure of a seat back according to the present invention, a seat back body for holding a back of an occupant and a front surface of the seat back body via an attachment are provided. In the structure of an automobile seatback having an armrest provided and a tether anchor disposed on the back of the seatback main body corresponding to the mounting fixture, an end of the mounting fixture is extended rearward, and the seatback main body is extended. , And the tether anchor is fixed to the extension, so that the tether anchor is attached to the seat back body by using the attachment of the armrest.

In one aspect of the present invention, the tether anchor includes a flat holder, and the tether anchor is attached to the seat back body while the holder is in contact with the back surface of the seat back body. I have. And in another aspect of the present invention, the attachment is provided with a flat portion, and the attachment is attached to the seatback body in a state where the flat portion is in contact with the front surface of the seatback body. . Further, in still another aspect of the present invention, the mounting tool is a bracket provided with a bolt protruding rearward, and the bolt is used to fasten the seatback body and the tether anchor while being inserted therethrough. .

In still another aspect of the present invention, a recess for attaching a tether anchor of the seat back body is formed. In still another aspect of the present invention, the depth of the concave portion is formed larger than the height of the tether anchor attached to the seat back body, and the tether anchor is disposed so as to be housed in the concave portion. Furthermore, in still another aspect of the present invention, the tether anchor holder comprises:
It is formed by folding and stacking one holder material at the center of the fold line, of which the upper piece covers the lower piece.

[0008] In still another aspect of the present invention, when a plurality of the holder members are punched out of the plate-shaped body, the punched portion of one holder material and the punched portion of the one holder material are adjacent to each other. The positional relationship between the punched portion of the other holder material and the punched portion of the other holder material is rotated by 180 ° with respect to the punched portion of the one holder material so that the respective side surfaces coincide with each other. I have to.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIG. 1, the vehicle seat 1 according to the embodiment of the present invention is roughly composed of a seat cushion 3, a seat back 5, and a headrest 7.

A recess 9 is formed in the front of the seat back 5 and is recessed rearward. An armrest 11 is rotatably supported at the lower end 9a of the recess 9. Therefore, when the armrest 11 is used, the armrest 11 can be tilted forward as shown in FIG. 1, and when not in use, can be raised rearward and stored in the storage recess 9.
The seat back 5 is rotatably supported by the seat cushion 3 and can be held at a fixed angle by operating a reclining device 13 provided on a side portion. Then, as shown in FIG. 2, the back 15 of the seat back 5 can be used as a cargo bed by moving the seat back 5 forward and overlapping the seat back 3. Further, a tether anchor 17 is provided on the back surface 15, and an auxiliary band (not shown) for attaching a CRS is attached to the tether anchor 17, or a rope or a net for securing a load to the back surface 15 of the seat back 5 is hooked. And a tether strap.

FIG. 3 is an enlarged perspective view of the vicinity of the mounting portion of the tether anchor 17. As described later, the tether anchor 17 is provided with a hook 19 formed in a ring shape. On the other hand, since the rectangular hole 23 is formed in the carpet 21 disposed on the back surface of the seat back 5, the hook 19 can be raised and out of the rectangular hole 23, or the hook 19 can be removed. It can be folded down and stored in the square hole 23. As shown in FIG. 4, a tether anchor storage recess 25 is formed on the back side of the seat back 5. The storage recess 25 for the tether anchor is formed by partially hollowing out the back side of the foam 27 provided inside the seat back 5 to form a recess recessed forward (downward in FIG. 4). The panel 29 formed to conform to the shape is covered from the back side (upper side in FIG. 4), and the back side of the panel 29 is further covered by the flat carpet 21. And tether anchor 17
Is mounted on the rear side of the seat back 5 with the stud bolt 65 in a state of being housed in the tether anchor housing recess 25 so as to face the mounting portion of the armrest 11 directly. ing.

As shown in FIGS. 5 and 6, the tether anchor 17 has a ring-shaped hook 19 formed in a substantially rectangular shape.
And a two-folded holder 35 formed in a plate shape.
Are folded in two so that they are wound together. For this reason, the tip strength of the hook 19 can be improved while maintaining the width held by the holder 35.

As shown in FIG. 7, the hook 19 has a radius of curvature R1 at a corner on the holder mounting side smaller than a radius of curvature R2 at a corner on which the rope or the net is caught. The holder 35 is manufactured by punching a holder material 41 having a shape shown in FIG. 8 from a plate-shaped body as a material, and bending the holder material 41 into two parts at a fold line L indicated by a dashed line. In this case, the holder members 41 are alternately arranged so as to form a so-called staggered shape after being punched from the plate-like body. That is, it is rotated by 180 ° with respect to the punched portion of one holder material 41 so that the side surface 41a of the punched portion of the one holder material 41 matches the side surface 43a of the punched portion of the other holder material 43. , The area of the waste material is reduced, and the yield of the material can be improved. As can be seen from FIG. 8, the width W1 of the piece 41b on the left side of the fold line L in the holder material 41 is formed to be larger than the width W2 of the piece 41c on the right side of the fold line L. For this reason, even if a slight error occurs in the molding dimensions of the left piece 41b and the right piece 41c, the right piece 41c disposed below is formed when each of them is bent and overlapped up and down. Does not protrude from the left side piece 41b disposed on the upper side, and does not impair the appearance. Also, the upper piece 41b
Is formed larger than the diameter of the bolt hole 53 provided in the lower piece 41c, so that the upper piece 41b is overlapped with the lower piece 41c. Even if a slight displacement occurs between the bolts 51 and 53, the bolt holes 53 of the lower piece 41c are not hidden, and an effective bolt hole diameter can be secured. Note that the tongue piece 44 formed on the left piece 41b in FIG.

As described above, the tether anchor 17 is a part of the left side piece 4 of the holder material 41 constituting the holder 35.
1b is folded with the fold line L as a boundary, folded in two while being wound around one piece 19a of the hook 19, and the left and right pieces 41b and 41c can be easily joined together.

On the other hand, at the mounting end of the armrest 11,
As shown in FIG. 9, since the U-shaped bracket 63 is supported via the pin 61, the armrest 11 can be freely turned around the pin 61. Also, stud bolts 65 and 67 are provided upright on the upper and lower sides on the back side of the bracket 63 shown in FIG. 9, respectively. The stud bolts 65 and 67 correspond to the stud bolts 65 and 67, respectively. The recess 9 is provided with three bolt holes 71 and 73, respectively. That is, the stud bolt 65 is inserted through the bolt hole 71, and the stud bolts 67, 67 are inserted through the bolt holes 73, 73.

Next, a procedure for attaching the armrest 11 and the tether anchor 17 to the seat back 5 will be described.
First, as shown in FIG. 9, a U-shaped bracket 63 is attached to the attachment end of the armrest 11. Thereby, the armrest 11 is supported rotatably by the bracket 63 around the pin 61. Then, as shown in FIG. 10, the stud bolts 65 and 67 of the bracket 63 are inserted into the bolt holes 71 and 73 of the recess 9, and the tips of the stud bolts 65 and 67 are inserted into the bolt holes 7 of the panel 29.
Projecting from 7, 79 to the back side of the seat back 5. In this state, the claw 45 of the tether anchor 17 is fitted into the long hole 81 of the panel 29, and the tip of the stud bolt 65 is inserted into the bolt hole 83 of the tether anchor 17, and fastened with the hood nut 85. And the stud bolt 67,
67 is also screwed together with another hood nut 87. When the tether anchor 17 is used, as shown in FIG. 4, a hook portion 89 such as a rope is hung on the hook 19 in a state where the hook 19 is raised and protruded from the square hole 23 of the carpet 21 to the outside.

The operation of the structure of the seat back having the above structure will be described below. First, the tether anchor 17 is also fixed using the stud bolts 65 and 67, which are fixing tools for attaching the armrest 11 to the seat back 5, so that it is not necessary to separately provide a separate member for fixing the tether anchor 17. Thus, the number of parts and the number of assembling steps can be reduced. The storage recess 9
Is provided with a bracket 63, so that the bracket 63 serves as a reinforcing plate when the tether anchor 17 is mounted, the mounting strength of the tether anchor 17 is improved, and there is no need to separately provide a tether anchor reinforce. . Also, for the bracket 63, the tether anchor 1
The two-piece holder 35 constituting the reinforcement 7 serves as reinforcement, and the mounting strength of the armrest 11 is improved.

Further, in the panel 29 provided on the back surface of the seat back 5, a storage recess 25 for a tether anchor is formed at a portion facing the bracket 63, and the tether anchor 17 is stored in the storage recess 25 for the tether anchor. ,
The hood nuts 85 and 87 do not protrude from the back surface 15 of the seat back 5. Since the tether anchor storage recess 25 is covered with the carpet 21,
The rear surface 15 of the seat back 5 becomes flat, and the tether anchor receiving recess 25 can provide a bead effect of increasing the surface strength of the mounting surface of the armrest 11 to which a load is applied.

By fitting the claw 45 provided on the tether anchor 17 into the elongated hole 81 formed in the panel 29 of the seat back 5, an effect of preventing the tether anchor 17 from rotating when the hood nut 85 is screwed. To play.

Note that the present invention is not limited to the above-described embodiment, and various changes and modifications can be made. For example, in the above-described embodiment, the stud bolts 65 and 67 and the hood nuts 85 and 87 are used as means for attaching the bracket 63 to the storage recess 9 of the seat back 5, but a welding nut is welded to the bracket and screwed with a bolt. You may make it match. When a very large load is applied to the tether anchor 17, the holder 35 may be enlarged to fasten a plurality of stud bolts at the same time.

[0021]

As described above, according to the structure of the seat back according to the present invention, the seat back main body for holding the back of the occupant and the front surface of the seat back main body are provided via the attachment. In the structure of an automobile seatback provided with an armrest and a tether anchor provided on the back of the seatback body corresponding to the attachment, an end of the attachment is extended rearward to penetrate the seatback body. ,
By fixing the tether anchor to this extension, the tether anchor is attached to the seatback body using the armrest attachment, so that a separate fixture for attaching the tether anchor becomes unnecessary,
The number of parts and the number of assembling steps can be reduced.

Further, according to one aspect of the present invention, the tether anchor includes a flat holder, and the tether anchor is attached to the seat back body in a state where the holder is in contact with the back surface of the seat back body. Because of the attachment, the tether anchor holder is reinforced for the armrest, and the attachment of the armrest is strengthened, so that a separate reinforcement is not required.

Further, according to another aspect of the present invention, the mounting member has a flat portion, and the mounting device is attached to the seat back with the flat portion abutting the front surface of the seat back body. Since it is attached to the main body, the attachment plays the role of a reinforcing member for attaching the tether anchor, so that the attachment strength is improved, and a separate tether anchor reinforce is not required. In addition, by using both the flat part of the attachment and the planar holder of the tether anchor, the two-layered holder of the tether anchor is reinforced for the armrest, and the attachment serves as a reinforcing material for the tether anchor. Mounting strength is improved.

And according to yet another embodiment of the present invention,
The mounting fixture is a bracket provided with a bolt protruding rearward, and the bolt is used to tighten the seatback main body and the tether anchor while being inserted. And the assemblability is improved, and the appearance of the seat back from the front is also improved.

According to still another aspect of the present invention, since the concave portion for attaching the tether anchor of the seat back body is formed, it is possible to obtain an effect of a bead for increasing the surface strength of the mounting surface of the armrest to which a load is applied. Can be.
Further, according to still another aspect of the present invention, the depth of the recess is formed larger than the height of the tether anchor attached to the seat back body, and the tether anchor is disposed so as to be housed in the recess. Thus, the tether anchor and the mounting fixture fixed to the tether anchor do not protrude from the back of the seat back, and the back of the seat back can be made flat.

And according to yet another aspect of the present invention,
The holder of the tether anchor is formed by folding and stacking one holder material at a fold line at the center of the holder material, and of the stacked pieces, the upper piece covers the lower piece. Therefore, even if there is some error in the molding dimensions of the upper piece and the lower piece, the lower piece does not protrude from the upper piece, and the appearance is improved without increasing the dimensional accuracy. be able to.

According to still another aspect of the present invention, when a plurality of the holder members are punched out of the plate-like body, a punched portion of one holder material and a punched portion of the one holder material are punched out. The side relationship between the punched portion of the other holder material and the punched portion of the other holder material is rotated by 180 ° with respect to the punched portion of the other holder material. Therefore, a plurality of holder members can be arranged on a plate-shaped body, which is a raw material, without leaving a space between the holder members, and punching can be performed, and the material yield can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an automobile seat provided with a seat back according to the present invention.

FIG. 2 is a perspective view showing the vehicle seat in a state where the seat back of FIG. 1 is folded down.

FIG. 3 is an enlarged perspective view of a portion B in FIG. 2;

FIG. 4 is a sectional view taken along line AA in FIG. 2;

FIG. 5 is an enlarged plan view of the tether anchor of FIG. 2;

FIG. 6 is a side view of the tether anchor shown in FIG.

FIG. 7 is a plan view of a hook constituting the tether anchor of FIG. 5;

FIG. 8 is a developed plan view of a holder constituting the tether anchor of FIG. 5;

FIG. 9 is an exploded perspective view showing a state where the armrest is attached to the seat back.

FIG. 10 is an exploded perspective view of FIG. 9 as viewed from the back side of the seat back.

FIG. 11 is a perspective view showing a conventional automobile seat provided with a seat back.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat 3 Seat cushion 5 Seat back 7 Headrest 9 Storage recess 11 Armrest 13 Reclining device 15 Back 17 Tether anchor 19 Hook 21 Carpet 23 Square hole 25 Storage recess for tether anchor 27 Foam 29 Panel 35 Holder 41, 43 Holder material 41a, 43a Side surface 41b, 41c Piece 45 Claw 51, 53 Bolt hole 61 Pin 63 Bracket 65, 67 Stud bolt 71, 73, 77, 79, 83 Bolt hole 85, 87 Hood nut

Claims (8)

[Claims] 1. A seat back body for holding an occupant's back, an armrest disposed on a front surface of the seat back body via a mounting member, and a rear surface of the seat back body corresponding to the mounting member. In the structure of an automobile seat back provided with a tether anchor, the end of the mounting fixture is extended rearward to penetrate the seat back body, and the tether anchor is fixed to the extension, so that the tether anchor is A seat back structure, wherein the seat back is attached to the seat back main body using an armrest attachment. 2. The tether anchor is provided with a flat holder, and the tether anchor is attached to the seatback main body in a state where the holder is in contact with the back surface of the seatback main body. 2. The structure of the seat back according to 1. 3. The mounting device according to claim 2, wherein the mounting device includes a flat portion, and the mounting device is mounted on the seat back body in a state where the flat portion contacts the front surface of the seat back body. Item 3. The structure of the seat back according to item 1 or 2. 4. A bracket provided with bolts protruding rearward from the attachment, wherein the brackets are tightened with the seatback body and the tether anchor inserted through the brackets. The structure of the seat back according to any one of 1 to 3. 5. The seat back structure according to claim 1, wherein a recess for attaching a tether anchor of the seat back body is formed. 6. The depth of the recess is formed to be greater than the height of a tether anchor attached to the seat back body,
The structure of the seat back according to claim 5, wherein the tether anchor is disposed so as to be housed in the recess. 7. The holder of the tether anchor is formed by folding and stacking a single holder material at a folding line at a central portion thereof, and among the stacked pieces, an upper piece is used to form a lower piece. The structure of the seat back according to any one of claims 1 to 6, wherein the structure is configured to cover the seat back. 8. When a plurality of said holder members are punched out of a plate-shaped body, a punched portion of one holder material and a punched portion of another holder material adjacent to the punched portion of said one holder material. Wherein the punched portion of the other holder material is rotated by 180 ° with respect to the punched portion of the one holder material so that the side surfaces thereof coincide with each other. 8. The structure of the seat back according to 7.