JP2015009727A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat which does not inhibit cleavage of a sewing line to the utmost (cleaves smoothly) even in such a structure that holes for fitting the other members of a seat cover are arranged adjacently to the sewing line for airbag expansion of a seat side part.SOLUTION: A vehicle seat is configured so that an airbag 30 is expandable from a linear sewing line 12 provided at the side of a seat cover 6S, and the other members can be installed by forming holes 14 at the positions adjacent to the sewing line 12 of the seat cover 6S. A seat cover portion (a second skin piece SP2) disposed between the sewing line 12 and the holes 14 is reinforced by a planar reinforcing member 10, and a fragile part 16 easier to rupture than the other marginal parts of the holes 14 is provided on the marginal part of the hole 14 of the side on which the reinforcing member 10 is disposed.

Description

  The present invention relates to a vehicle seat including an airbag disposed in a seat back.

As this type of vehicle seat, a vehicle seat including a seat back standing up from a seat cushion, a headrest, and an airbag disposed in the seat back is known (see Patent Document 1).
The headrest (an example of another member) is a substantially rectangular member, and a pair of headrest stays (bar-shaped) project from the lower side (side facing the seat back). The airbag is a bag material that can be inflated by inflow of inflation gas generated from the inflator, and is disposed in the side portion of the seat back.
The seat back includes a seat cover formed by stitching a plurality of skin pieces into a bag shape, a stitching line (burst line) capable of inflating the airbag, and a pair of holes. The stitching line (burst line) is a stitched portion between adjacent skin pieces, and is formed in a linear shape toward the top and bottom of the seat at the side of the seat back.
The pair of holes are through holes in the seat cover into which the headrest stays can be inserted, and are formed at an appropriate interval above the seat cover. And at least one hole will be arrange | positioned in the proximity | contact position of a sewing line. Further, the hole formed in the seat back shoulder at the outer side in the vehicle width direction is disposed in the vicinity of the stitching line.

In the known technique, after the seat back is covered with the seat cover, the headrest stay is inserted into the hole in the upper portion of the seat cover to attach the headrest.
When the vehicle collides, the airbag is inflated from the seat back side to the seating side by releasing the stitching line (separating the sewing thread) by pulling the seat cover accompanying the inflation of the airbag. At this time, the pulling force of the seat cover is transmitted to the entire stitching line through the sewing thread, so that the stitching line can be opened smoothly.

By the way, in the above-mentioned seat configuration, the seat cover can be torn linearly due to an impact at the time of inflation of the airbag, for example, torn from the hole (fragile portion).
In the configuration disclosed in Patent Document 1, the hole portion of the seat cover is disposed close to the stitching line on the seat side portion. For this reason, a tear extending from the hole may intersect (interfer with) the stitching line, and the stitching line may be prevented from being broken. That is, there is a concern that the suture line (sewing thread) is cut off at the tear and the transmission of the pulling force of the seat cover is interrupted, so that the entire suture line cannot be smoothly opened.
Therefore, in the technique of Patent Document 2, two webbings are provided inside the seat cover to reinforce the seat cover portion around the stitching line. At this time, the seat cover portion reinforced with the power cloth is disposed between the hole portion and the stitching line. For this reason, interference with the stitching line and the tear can be prevented as much as possible by preventing further formation of the tear at the seat cover portion reinforced with the power cloth.

JP 2009-96238 A JP 2003-341461 A

However, the technique of Patent Document 1 cannot control the position where the tear can be made and the extending direction thereof. For this reason, there exists a possibility that the tear extended from a hole part may cross | intersect a stitching line, detouring the seat cover part reinforced with the power cloth.
The present invention was devised in view of the above points, and the problem to be solved by the present invention is that the hole for attaching the other member of the seat cover is close to the airbag inflating stitching line on the side of the seat. Therefore, it is an object of the present invention to provide a vehicle seat that does not disturb the suture line as much as possible (smoothly tears) even in the structure arranged as described above.

As means for solving the above-mentioned problems, a vehicle seat of the first invention includes a seat back, a seat cover in which a plurality of skin pieces covering the seat back are stitched, and an airbag disposed in the seat back. And other members that can be attached to the seat back.
In the present invention, the airbag can be inflated from a linear stitching line provided on the side portion of the seat cover, and a hole is formed at a position close to the stitching line of the seat cover to attach another member.
In the present invention, the sheet-shaped reinforcing member reinforces the seat cover portion disposed between the stitching line and the hole portion, and the edge portion of the hole portion on the side where the reinforcing member is disposed is provided with the hole portion. It was decided to provide a fragile part that was easier to tear than the other edges.
In the present invention, at the fragile portion, by guiding the tear starting from the hole to the reinforcing member side (the seat cover portion that is reinforced and hardly broken), interference between the stitching line and the tear can be prevented as much as possible.

  The vehicle seat of the second invention is the vehicle seat of the first invention, and is reinforced by a reinforcing member between the first skin piece in which the hole is formed and the suture line for inflating the airbag. A second skin piece is arranged.

  The vehicle seat of the third invention is the vehicle seat of the first invention or the second invention, and is provided with a concealing member that covers the above-mentioned fragile portion (the seat structure has a good appearance).

  According to the first and second aspects of the present invention, even in the structure in which the hole for attaching the other member of the seat cover is disposed close to the airbag inflating suture line on the seat side, It is possible to provide a vehicle seat that inhibits the cleavage of the vehicle as much as possible (smoothly cleaves). Moreover, according to the 3rd invention, the appearance deterioration by the hole for other member attachment can be prevented as much as possible.

It is a schematic side view of a vehicle seat. It is a perspective view of a seat back. It is the III-III line expanded sectional view of FIG. It is a perspective view of a part of the seat back. It is a schematic side view which shows the vehicle mounting state of a seat back.

Hereinafter, embodiments for carrying out the present invention will be described with reference to FIGS. In each figure, a reference symbol F is attached to the front of the vehicle seat, a reference symbol B to the rear of the vehicle seat, a reference symbol UP to the upper side of the vehicle seat, and a reference symbol DW to the lower side of the vehicle seat.
In the present embodiment, a vehicle rear seat (vehicle seat 2) in which the side airbag 30 is disposed on the seat back 6 will be described as an example.
The vehicle seat 2 in FIG. 1 includes a seat component (seat cushion 4, seat back 6, headrest 8), a seat belt 9, and a side airbag 30 described later. Each of the seat constituent members includes a seat frame (4F, 6F, 8F) forming a seat skeleton, a seat pad (4P, 6P, 8P) forming a seat outer shape, and a seat cover (4S, 6S, 8S) covering the seat pad. ).
In the present embodiment, the vehicle seat 2 can be disposed on the vehicle compartment floor surface while being adjacent to or in contact with the side garnish SG (structure in the vehicle interior) (see FIG. 2).

Here, the headrest 8 (an example of another member) is coupled to the upper portion (upright state) of the seat back 6 via a pair of headrest stays HS (only one headrest stay is shown in FIG. 1).
The seat belt 9 is a belt-like member that can restrain an occupant (see a two-dot broken line in FIG. 1). In the present embodiment, the seat belt 9 is pulled out from the wall (retractor not shown) in the vehicle compartment while being hooked on the seat back 6 shoulder (a seat belt guide 20 described later), and then wound around the passenger on the seat. In this state, the passenger on the seat can be restrained by engaging the end portion of the seat belt 9 with the buckle on the seat cushion 4 side.

The seat back 6 is a member that is connected to the seat cushion 4 in a tiltable manner (see FIGS. 1 and 2).
The seat back 6 of the present embodiment includes a basic configuration (6F, 6P, 6S), a related configuration thereof (planar reinforcing member 10, stitching line 12, hole 14), a main portion 6a, and a pair of side portions. It has the site | part 6b and the side airbag 30 (The detail of each structure is mentioned later suitably). A seat belt guide 20 (an example of another member) to be described later is attached to the seat back 6.
Here, the main portion 6a is a flat portion (substantially rectangular in top view) where an occupant can be seated, and is formed at the center of the seat back 6 (see FIG. 2). The pair of side portions 6b are convex portions disposed on the side of the main portion 6a, and are divided into a top plate side portion on the seating surface side and a side hook portion (for convenience, reference numerals of the respective portions are omitted).
In this embodiment, a stitching line 12 (burst line, which will be described in detail later) is formed on one side portion 6b (the vehicle outer side or the seat width direction outer side) to inflate the side airbag 30 out of the seat at the time of a vehicle collision. (See FIGS. 2 and 5). Further, with reference to the time when the seat back 6 stands up, a hole 14 (detailed later) is formed in the upper part of the seat cover 6S (such as a close position of the stitching line), and a seat belt guide 20 described later can be attached.

By the way, with the said structure, the seat cover 6S may be torn from the hole part 14 by the impact at the time of inflation of the side airbag 30, and a linear tear may be made.
At this time, there is a concern that a tear that extends from the hole portion 14 intersects (interfers with) the suture line 12 and the smooth cleavage of the suture line 12 is inhibited.
Therefore, in the present embodiment, the suture line 12 is smoothly opened even in a structure in which the hole portion 14 of the seat cover 6S is disposed close to the suture line 12 on the side of the seat in the configuration (fragile portion 16) described later. It was possible. Hereinafter, each configuration will be described in detail.

Here, the side airbag 30 is a substantially cube-shaped member (unexpanded state), and bulges (inflates and protrudes) outside the seat upon receiving an impact at the time of vehicle collision (FIGS. 1, 2, and 5). See).
In the present embodiment, the uninflated side airbag 30 can be attached to the seat frame 6F (described later) via a bolt member (not shown) while being disposed in at least one of the side portions 6b. The side airbag 30 may be configured to enclose a gas generating agent or may be configured to communicate with a gas supply device (not shown).

In the seat back 6 of this embodiment, the seat pad 6P is covered with the seat cover 6S while being disposed on the seat frame 6F (see FIGS. 1 and 2).
Here, the seat frame 6F is an arch-shaped frame and can be formed of metal or resin (see FIG. 2). Further, the seat pad 6P (not shown) can be formed of an elastic resin such as polyurethane foam. The front of the side airbag 30 (described later) is preferably covered with a seat pad 6P that is uncovered or relatively thin.

The seat cover 6S is a bag-like member that covers the seat pad 6P, and includes a plurality of skin pieces (SP1 to SP3, etc.), a reinforcing member 10, and a configuration (stitching line 12, hole 14) described later ( (See FIGS. 2 and 3).
Here, the material of the seat cover 6S is not particularly limited, and examples thereof include fabric (woven fabric, knitted fabric, nonwoven fabric) made of natural fibers or synthetic fibers, leather (natural leather, synthetic leather), and composite materials thereof. In addition, after laminating a pad material (urethane laminate or the like) or a back base fabric (nonwoven fabric or the like) on the back surface side of the seat cover 6S, it can be integrated by lamination or the like.
And 1st skin piece SP1 is a skin piece which coat | covers the upper part of one side site | part 6b (top plate side part). The second skin piece SP2 is a skin piece that covers the upper part of one side portion 6b (seat side of the stile portion), and the third skin piece SP3 is one side portion 6b (rear side of the stile portion). It is a skin piece covering the upper part.
The reinforcing member 10 is a face material that partially reinforces the seat cover 6S, and can be formed by using the material exemplified in the seat cover 6S (see FIG. 3). In the present embodiment, the reinforcing member 10 having a shape following the second skin piece SP2 and the third skin piece SP3 can be used.

In this embodiment, the seat cover 6S is formed by sewing a plurality of skin pieces (SP1 to SP3, etc.) into a bag shape (see FIGS. 2 and 3).
For example, the first skin piece SP1, the second skin piece SP2, and the third skin piece SP3 (adjacent skin pieces) are sewn in this order with the sewing thread SEW to form the upper portion of one side portion 6b. And between these adjacent skin pieces, the suture SEW (continuous stitch line 12 described later) is formed by arranging the sewing thread SEW continuously above and below the sheet.
At this time, in the present embodiment, the one reinforcing member 10 is disposed on the back surface side of the second skin piece SP2, and the end portion of the reinforcing member 10 is placed on the end portions of the first skin piece SP1 and the third skin piece SP3. Co-sewn together (see FIG. 3). Similarly, the other reinforcing member 10 is arranged on the back side of the third skin piece SP3, and the end of the reinforcing member 10 is sewn to the end of the second skin piece SP2 and the like. In this way, by reinforcing the second skin piece SP2 and the third skin piece SP3 with the reinforcing member 10, the side airbag 30 can be more reliably inflated from the stitching line 12 (described later) (FIG. 3 and FIG. 5).

The stitching line 12 (burst line) is a fragile portion (linear shape) of the seat cover 6S from which the side airbag 30 can bulge, and can be formed by a stitched portion between adjacent skin pieces (see FIGS. 2 to 5). reference).
In the present embodiment, the sewing line 12 is formed by the sewing thread SEW between the second skin piece SP2 and the third skin piece SP3 (upper portion of the hook portion) (see FIGS. 2 and 5). When the vehicle or the like collides, the sewing thread SEW is divided and the stitching line 12 is opened by pulling the seat cover 6S (second skin piece SP2, third skin piece SP3) accompanying the inflation of the side airbag 30. Thus, the side airbag 30 is inflated. At this time, the pulling force of the seat cover 6S is transmitted to the entire sewing line 12 through the sewing thread SEW, so that the sewing line 12 can be smoothly opened.

The hole 14 is a through hole of the seat cover 6S and has a fragile portion 16 described later (see FIGS. 1 and 2).
In the present embodiment, a pair of hole portions 14 (substantially oval) is formed at an appropriate interval above the side portion 6b (top plate side portion). At this time, one hole portion 14 is formed in the first skin piece SP1 (one side portion 6b) so as to be disposed close to the suture line 12 of the hook portion. In addition, the formation position of one hole part 14 should just be the range (range close to the stitching line 12) in which the tear extended from the hole 14 can reach the stitching line 12.

The fragile part 16 is a part that constitutes a part of the edge of the hole part 14, and is a part that is more easily torn than other edges (see FIG. 2).
In this embodiment, the weakened portion 16 is formed by cutting out a part of the edge of the hole portion 14 into a substantially triangular shape. And the weak part 16 is formed in the edge part of the side (reinforcing member 10 side or the sewing line 12 side) which faces 2nd skin piece SP2, and it extends toward 2nd skin piece SP2 (sheet width direction). .
In addition, the weak part 16 can be formed as a notch part of various shapes other than a triangular notch part, and a notch part (slit part). In addition, when the pad material or the back base fabric is integrated with the back surface of the seat cover 6S by lamination or the like, the portion where the pad material or the back base fabric is omitted (the portion having a smaller thickness dimension than the other edges) is fragile. Part.

The concealing member is a member that can cover (conceal) the fragile portion 16 and can be attached to the seat cover 6S (see FIGS. 1 and 4).
A seat belt guide 20 (an example of another member) can be used as the concealing member of the present embodiment. The seat belt guide 20 is a substantially L-shaped (sectional view) flat plate member, and includes a base portion 22 and an upright portion 24. The base portion 22 is a flat plate portion that can cover the entire hole portion 14 (fragile portion 16). Further, the standing portion 24 is a flat plate portion that is erected from the base portion 22 and on which the seat belt 9 can be hooked.

With reference to FIGS. 1 and 2, the seat belt guide 20 is attached to the upper portion (hole portion 14) of the seat back 6.
At this time, in this embodiment, referring to FIG. 4, the seat belt guide 20 (base portion 22) is placed on the shoulder of the seat back 6 while covering the entire hole portion 14, thereby suppressing exposure of the fragile portion 16. (It is a good-looking sheet structure).
Referring to FIG. 1, the seat belt 9 can restrain the passenger on the seat. At this time, in this embodiment, after the seat belt 9 that has been pulled out is hooked on the seat belt guide 20 (the standing portion 24), it can be routed toward the lower side of the seat.

Referring to FIGS. 2 and 5, at the time of vehicle collision, the stitching line 12 (burst line) is opened, and the side airbag 30 is inflated to the seating side.
At this time, in this embodiment, a linear tear is formed from the hole portion 14 by the expansion of the side airbag 30. There is a concern that this tear may intersect (interfer) with the suture line 12 to prevent smooth tearing of the suture line 12.
Therefore, in this embodiment, the second skin piece SP2 (the skin piece disposed between the stitching line 12 and the hole 14) is reinforced by the reinforcing member 10. And the fragile part 16 was provided in the edge part (the reinforcing member 10 side or the stitching line 12 side) of the hole part 14.
For this reason, in the present embodiment, a tear starting from the hole portion 14 is guided to the second skin piece SP2 while being formed on the extension line of the fragile portion 16. The second skin piece SP2 (the skin piece reinforced by the reinforcing member 10) prevents further formation of the tear, thereby preventing interference between the suture line 12 and the tear as much as possible.
By avoiding the interference between the tear line and the stitching line 12 in this way, the pulling force of the seat cover 6S is transmitted to the entire stitching line 12 through the sewing thread SEW, and the stitching line 12 is smoothly opened.

As described above, according to the present embodiment, the fragile portion 16 leads the rupture starting from the hole portion 14 to the reinforcing member 10 side (the sheet cover portion that is reinforced and is not easily torn), so that the suture line 12 and the rip Can be prevented as much as possible.
Further, according to the present embodiment, the fragile portion 16 is concealed by the seat belt guide 20, so that the seat configuration with good appearance is obtained.
For this reason, according to the present embodiment, the suture line 12 is also torn even in the structure in which the hole 14 for attaching the other member of the seat cover 6S is arranged close to the airbag inflating suture line 12 on the seat side. It is possible to provide the vehicle seat 2 that does not hinder the vehicle as much as possible (smoothly cleaves).

The vehicle seat of the present embodiment is not limited to the above-described embodiment, and can take other various embodiments.
(1) In this embodiment, the example (example used as a dressing) which arrange | positions the planar reinforcement member 10 on the back surface of a skin piece was demonstrated. Unlike this, it is also possible to adopt a configuration in which a band-shaped (planar) reinforcing member is disposed around the side airbag (used as a blanching cloth). In this case, one side of the reinforcing member is attached to the seat frame, and the other side of the reinforcing member is sewn to the skin piece. And a weak part can be formed toward the joint sewing part of a reinforcement member and a skin piece.
(2) Moreover, in this embodiment, although the seatbelt guide 20 was illustrated as another member, it is not the meaning which limits the kind of other member. For example, a headrest stay can be illustrated as another member.

(3) Moreover, in this embodiment, the example which provides the stitching | suture line 12 in the side site | part 6b (kama part) was demonstrated. On the other hand, a stitching line can be provided in the top plate side portion, and in this case, a hole portion can be provided in the hook portion. Further, the stitching line can be arranged in the sheet width direction.
(4) Moreover, in this embodiment, the seatbelt guide 20 which is also a concealment member was illustrated as another member. For example, the concealing member can be configured to cover only the fragile portion (a member different from other members), and the shape and dimensions thereof can be changed as appropriate. Further, the concealing member can be omitted depending on the sheet configuration.
(5) The configuration of the present embodiment can be applied to all vehicle seats such as vehicles, aircraft, and trains.

2 Seat 4 for vehicle Seat cushion 6 Seat back 8 Headrest 9 Seat belt 6S Seat cover SP1 First skin piece SP2 Second skin piece SP3 Third skin piece 6P Seat pad 6F Seat frame 6a Main part 6b Side part 10 Reinforcing member 12 Suture Line (burst line)
14 Hole 16 Fragile 20 Seat belt guide (other member, concealment member)
22 Base 24 Standing part 30 Side airbag (airbag)
HS headrest stay

Claims (3)

A seat back, a seat cover in which a plurality of skin pieces covering the seat back are stitched, an airbag disposed in the seat back, and other members attachable to the seat back;
The airbag can be inflated from a linear stitching line provided on the side portion of the seat cover, and the other member is attached by forming a hole in the seat cover near the stitching line. In the vehicle seat
A sheet-shaped reinforcing member reinforces the seat cover portion disposed between the stitching line and the hole portion, and an edge portion of the hole portion on the side where the reinforcing member is disposed on the hole portion. A vehicle seat provided with a fragile portion that is easier to tear than other edges.   The vehicle according to claim 1, wherein a second skin piece reinforced by the reinforcing member is disposed between the first skin piece in which the hole is formed and the stitching line for inflating the airbag. Sheet. The vehicle seat according to claim 1, further comprising a concealing member that covers the fragile portion.

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