JPH09295547A - Seat structure provided with air bag device for sideward collision - Google Patents

Abstract

PROBLEM TO BE SOLVED: To unfold an air bag body for sideward collision quickly and smoothly as well as to get rid of any limitation of material for a seat skin. SOLUTION: A seat skin 20 is composed of such a material as being relatively expandable, and a front side skin 44 and a seat backside skin 46 are sewed up in a sewing part 48 which is situated in and around the front side of a front end edge part 36A of a lid 36, and it is broken down by this lid 36 whenever an air bag body is unfolded. Cotton cloth 50 as cloth being hard to expand is installed in an inner part of the seat backside skin 46, and a terminal 50A at the front side of the cottom cloth 50 is sewed up in the sewing part 48. Likewise another terminal 50B at the rear of the cotton cloth 50 is engaged with a wire 21 as a locking member at the seat side via an engaged member hook 54 together with a terminal 46B at the rear of the seat backside skin 46.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat structure provided with a side impact airbag device, and more particularly to a seat structure having a side impact airbag device built into a door side portion of a seat back.

[0002]

2. Description of the Related Art Conventionally, various measures have been taken to improve occupant protection performance in a side collision (hereinafter simply referred to as "side collision"). As an example, in recent years, it has been promoted to incorporate a side collision airbag device into a side portion of a front seat of a vehicle. A structure of a front seat having a built-in airbag device for this type of side collision is disclosed in JP-A-6-64491, and the structure disclosed in the publication will be discussed below mainly in relation to the seat skin. I will do it.

FIG. 19 shows a side view of a front seat 150 having a built-in airbag device disclosed in this publication. As shown in this figure, a side collision airbag device 154 is built in a side portion on the door side of the seat back 152 of the front seat 150. The airbag device 154 for side collision is disposed roughly below the seat cushion 156 and detects a high load acting state on a side door (not shown). 157 is configured to include a substantially cylindrical inflator 158 that ejects a gas by detecting a high load acting state, and a bag 160 that is inflated by the gas ejected from the inflator 158. In addition, these inflators 158
The bag 160 is housed in the internal space of the airbag case 164 and the lid 166 fixed to the side of the seat back frame 162 (see FIG. 20) on the door side.

Here, as shown in an enlarged view in FIG. 20, in the structure disclosed in this publication, the seat back 1 is made to perform the expanding operation of the lid 166 when the bag is inflated.
The outer skin 168 of 52 is divided into a plurality of pieces and sewn. That is, the skin 168 of the seat back 152 is the front main skin 17 that covers the front surface of the central portion of the seat back 152.
0, two front side skins 172 and 174 covering the front side of the seat back 152, and the airbag device 15
Seat back side skin 176 covering the lid 166 of No. 4
And a rear skin 178 that covers the back side of the seat back 152.
And is divided into

Further, the front end 176A of the seat back side skin 176 and the rear end 174A of the front side skin 174 are sewn with sewing thread 180 in order to unfold the seat back side skin 176 located on the side of the lid 166. Have been. The sewing at this portion is set to a low sewing strength by, for example, performing single sewing as shown in the drawing. Therefore, this portion becomes a break portion. In contrast, the rear end 176 of the seat back side skin 176
B and the front end 178A of the rear skin 178 are each formed into a loop and then sewn with sewing thread 182 and sewing thread 184, respectively. It is sewn with. The sewing at this portion is set to a high sewing strength by, for example, double sewing as shown in the figure. Therefore, it does not break at this portion, and serves as a deployment hinge of the seat back side skin 176.

Therefore, when the bag 160 is expanded by the gas ejected from the inflator 158, the lid 166 is centered on the hinge portion 166A formed at the rear side end of the lid 166 (in the direction of the arrow W in FIG. 20). ), The sewn portion between the front end 176A of the seat back side skin 176 and the rear end 174A of the front side skin 174 is destroyed by the expanding force at this time.

[0007]

However, in the seat structure provided with the airbag apparatus for side impact, the bag 160 is expanded when the outer skin 168 of the seat back 152 is made of a material that is relatively stretchable, such as knit. Initially, the skin 168, as shown by the chain double-dashed line in FIG.
The large extension to the outside in the seat width direction makes it difficult for the sewn portion of the sewing thread 180, which is supposed to be broken, to break easily, the expansion speed of the airbag bag 74 becomes slow, and the expanded shape of the bag 160 becomes unstable. Can be considered. For this reason, it is not possible to use a relatively easily stretchable material such as a knit that has been conventionally used for the seat surface, and the material for the seat surface is limited.

For the purpose of easily fitting the seat cover to the seat back (seat pad) to improve the appearance and to improve the sitting comfort, the front and side seat covers have conventionally been made of a stretchable material. .

In consideration of the above facts, the present invention allows the airbag for side impact to be quickly and smoothly deployed, the material of the seat cover is not limited, and the seating comfort is not adversely affected. It is an object to obtain a seat structure provided with a side impact airbag device.

[0010]

According to a first aspect of the present invention, an airbag device built in a door side portion of a seat back is actuated at the time of a side collision, and a sewing portion between a front seat skin and a side seat skin is provided. In a seat structure including a side impact airbag device configured to be broken and to deploy an airbag bag between a vehicle body side portion and an occupant side portion, the side surface seat skin is provided inside the side seat skin. It is characterized in that a cloth that is harder to stretch is integrally provided, and an end of the cloth that is harder to stretch on the side opposite to the sewn portion is locked to a seat-side fixing member.

Therefore, when the airbag device incorporated in the side portion of the seat back frame on the door side is actuated at the time of a side collision, the airbag bag body is expanded to try to spread the seat cover. At this time, there is a fabric that is difficult to stretch inside the side sheet skin, and since the terminal on the side opposite to the sewing part of the fabric that is difficult to stretch is locked to the fixing member on the seat side, for example, a material that is easily stretchable on the side sheet skin. Even if the side seat cover is used, the side seat skin does not stretch so much and the deployment force of the airbag body is transmitted to the sewn part between the front seat cover and the side seat cover without loss, and the sewn part is relatively easily destroyed. It

Therefore, according to the present invention, the airbag for side impact can be quickly and smoothly deployed, the material of the seat cover is not limited, and the seating comfort is not adversely affected.

According to a second aspect of the present invention, in the seat structure including the side impact airbag device according to the first aspect, one end of the non-stretchable cloth is temporarily fixed to the side seat skin. The outer sheet is sewn to the front sheet skin together with the side sheet skin at the outer side position, and the other end is fixed to the side sheet skin with a locking member attached.

Therefore, one end of the non-stretchable cloth is temporarily fixed to the side sheet skin in advance, and its outer position is sewn to the front sheet skin together with the side sheet skin by a sewing thread as in the conventional manufacturing process. Since the seat cover is manufactured, it is not necessary to significantly change the conventional manufacturing process.

According to a third aspect of the present invention, in the seat structure including the side impact airbag device according to the second aspect, the locking member is locked to a wire fixed to the seat back frame. It is characterized by that.

Accordingly, at the time of assembling, the engaging member attached to the side seat skin and the cloth which is difficult to stretch is engaged with the wire fixed to the seat back frame to facilitate the assembling.

According to a fourth aspect of the present invention, at the time of a side collision, an airbag device incorporated in a side portion of a seat back on a door side is operated to destroy a sewn portion between a front seat skin and a side seat skin, and thereby an air bag. In a seat structure including a side impact airbag device configured to deploy a body between a vehicle body side portion and an occupant side portion, a cloth that is less stretchable than the side surface seat skin is provided inside the side seat skin. It is characterized in that only the front end of the cloth which is difficult to stretch is fixed to the side seat skin and the rear end is locked to the seat side fixing member.

Therefore, on the side surface of the seat back having a curved surface, when the side sheet skin and the non-stretchable cloth are overlapped and sewn around and then wrapped around the seat back, the curved surface conforms to the shape of the seat back. Then, it is pulled by the non-stretchable cloth and wrinkles appear on the side seat skin, but by fixing only the front end of the non-stretchable cloth to the side seat skin and locking the rear end to the fixing member on the seat side, the non-stretchable cloth The upper and lower edges and the rear end of the sheet do not restrain the side sheet skin, and wrinkles are less likely to appear on the side sheet skin.

According to a fifth aspect of the present invention, in the seat structure provided with the side collision airbag device according to the fourth aspect, the front end of the non-stretchable cloth is temporarily fixed to the side seat skin, and It is characterized in that it is sewn to the front seat skin together with the side seat skin by a sewing thread at an outer position, and the rear end is locked to a seat side fixing member by a locking member.

Therefore, in the state where the front end of the cloth which is difficult to stretch is temporarily fixed to the side seat skin in advance, the outer position thereof is sewn to the front seat skin together with the side seat skin by the sewing thread as in the conventional manufacturing process. Since the seat skin is manufactured, it is not necessary to significantly change the conventional manufacturing process. Further, at the time of assembling, the locking member of the rear end may be formed on the seat-side fixing member, which facilitates the assembling.

According to a sixth aspect of the present invention, in the seat structure provided with the airbag device for side impact according to the first or fourth aspect, the cloth which is difficult to stretch is more than the vertical width of the airbag bag body. It is characterized in that it is in the form of a narrow band and is arranged at a position including the center line of the vertical width of the airbag bag.

Therefore, since the width of the fabric which is difficult to stretch is narrower than the vertical width of the airbag bag and is arranged at a position including the center line of the vertical width of the airbag bag, the airbag bag bulges out. The stress at the time concentrates on a relatively narrow range including the center line of the vertical width of the airbag body of the sewn portion, and the sewn portion is easily broken.

According to a seventh aspect of the present invention, there is provided a seat structure including the side collision airbag device according to the first or fourth aspect, wherein the sewn portion includes the front seat skin and the side seat skin. A bead formed of a beaded fabric and a bead core sewn to the non-stretchable fabric is provided, and the beaded side is at least in the region of the non-stretchable fabric when the airbag bag body is inflated. It is characterized by remaining in.

Therefore, when the airbag apparatus for side impact is mounted on a sheet having a bead on the sewing portion of the front seat skin, the side seat skin and the non-stretchable cloth, the airbag bag is installed from the rear side of the bead. There are cases where the body bulges and cases where the airbag body bulges from the front side of the bead.On the one side of the same seat, depending on the vertical position of the seat, on the other hand, the airbag from the rear side of the bead The bag body may bulge, and on the other hand, the airbag bag body may bulge from the front side of the bead. At this time, if the bead cannot be broken, the airbag bag may be caught on the bead and cannot secure a required developed shape. However, in the present invention, in the region of the cloth where the bead is difficult to stretch, the airbag is Since the airbag remains on the skin side of the side sheet when the bag swells, the airbag bag expands to a required expansion shape.

According to an eighth aspect of the present invention, in the seat structure provided with the side airbag device according to the seventh aspect, the bead cloth is the front sheet skin, the side sheet skin and the non-stretchable cloth. It is characterized in that it is sewn to the side sheet skin and the non-stretchable cloth by the second sewing thread at a position inside the seat with respect to the first sewing thread to be sewn.

Therefore, in a state where the bead is fixed to the side sheet skin and the cloth which is difficult to stretch with the second sewing thread in advance, the outer position of the bead is joined to the side sheet skin by the first sewing thread as in the conventional manufacturing process. Since the seat skin is manufactured by sewing the front seat skin, it is not necessary to significantly change the conventional manufacturing process.

According to a ninth aspect of the present invention, in the seat structure including the side airbag device according to the eighth aspect, the second sewing thread has a higher strength or a smaller sewing pitch than the first sewing thread. It is characterized by that.

Therefore, the deploying speed of the airbag bag can be adjusted only by changing the strength or the sewing pitch of the second sewing thread.

According to a tenth aspect of the present invention, in a seat structure provided with the side collision airbag device according to the seventh aspect,
The non-stretchable cloth is arranged in a range of at least half the vertical width of the airbag bag within the vertical width of the airbag bag.

Therefore, the uncontrollable region of the break mode when the airbag bag bulges is reduced, that is, the airbag bag bulges from the rear side of the bead on the one hand and the other on the other hand depending on the position in the seat vertical direction. Since the area where the airbag bag may bulge from the front side of the bead is reduced, it is possible to deploy the airbag bag as intended, and at the same time, stress concentration when the airbag bag bulges causes air bags to swell. The bag body can be swollen to the outside of the seat skin quickly.

The present invention according to claim 11 provides a seat structure comprising the airbag apparatus for side impact according to claim 7,
The bead is within the range of the vertical width of the airbag bag,
It is characterized by having at least one fragile portion that breaks when the airbag body swells.

Therefore, depending on the position in the vertical direction of the seat, the airbag bag bulges from the rear side of the bead on the one hand, and on the other hand,
When the airbag bag bulges from the front side of the bead, the bead is broken from the fragile part, so the bulging of the airbag bag is not obstructed by the bead and the airbag bag is shortened. You can deploy it as you want in time.

[0033]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of a seat structure equipped with a side impact airbag device of the present invention will be described with reference to FIGS.

As shown in FIG. 4, the front seat 10 according to the first embodiment is used as a seat cushion 11 on which an occupant is seated and a tiltable rear end portion of the seat cushion 11, which is used as a backrest of the occupant. The seat back 12 and a headrest (not shown) that is disposed at the upper end of the seat back 12 so as to be adjustable in height are configured as main components.

As shown in FIG. 1, the seat back 12
Is a seat back frame 16 that is assembled into a substantially rectangular frame to form a skeletal member, and a seat back pad that is attached to the front side of the seat back frame 16 and that is set to a predetermined hardness using a resin such as urethane. 18 and a seatback skin 20 that covers the surface of the seatback pad 18.

Further, the side door 2 of the seat back 12
An airbag device 14 for side impact is built in the side portion on the second side. In addition, in FIG. 1, a door inner panel 26 and a door trim 28 that form a part of the side door 22.
Only illustrated.

As shown in FIG. 3, a bolt 15 is provided upright on the side impact airbag device 14, and the side impact airbag device 14 is provided by the bolt 15 and the nut 17.
Is attached to the side portion 16A of the seatback frame 16. Further, inside the side portion 16A of the seat back frame 16, a metal wire 21 as a seat-side fixing member is arranged along the vertical direction, and the upper end portion 21A and the lower end portion 21B of the metal wire 21 are Each is fixed to the seat back frame 16 by welding.

As shown in FIG. 1, the airbag case 2
A claw portion 27A is formed on the back surface of the base portion 27 of No. 5,
The claw portion 27A is engaged with the notch 16B formed in the side portion 16A of the seat back frame 16.

A folded air bag body 32 is stored in the air bag case 25, and the inflator storage portion 2 is recessed at the bottom of the base portion 27 toward the inside of the seat.
7B is provided with a cylindrical inflator 34.
The inflator 34 is arranged inside the airbag bag 32.

As the inflator 34, a gas generating agent-enclosed type or a high-pressure gas-enclosed type may be used. Briefly describing a configuration example of the inflator 34, in the case of the former type,
A bottomed cylindrical housing having a plurality of gas outlets formed on its peripheral surface, a gas generating agent which is disposed in the housing to generate gas by burning, and debris after combustion of the gas generating agent. It is configured to include a filter to be removed and an electric ignition type ignition device which is attached to an end portion on the opening side of the housing and burns the gas generating agent. On the other hand, in the case of the latter type, a cylindrical housing with a bottom, a pressure bulkhead disposed in the housing, and argon helium or the like sealed in a chamber separated by the pressure bulkhead and the housing. A mixed gas, a moving member that is movably disposed near the pressure partition and moves to break the pressure partition, and an electric ignition type ignition device that is mounted on the opening end of the housing and moves the moving member. , Is configured. Regardless of which type of inflator is used, the ignition device is operated by a sensor for detecting a side collision state. Also, an airbag device 1 for a side impact
In No. 4, since the airbag 32, which will be described later, is relatively small and requires a small gas capacity, a high-pressure gas-filled type inflator is often used.

A portion outside the airbag case 25 is a lid 36. The lid 36 is provided with the air bag body 3 by the gas ejected from the inflator 34.
When No. 2 is deployed, it is deployed in the seat outer direction (direction of arrow A in FIG. 1) around the hinge portion 38 formed at the rear end of the airbag case 25.

The seatback skin 20 is divided into a plurality of sheets. Specifically, the seat back skin 20 includes a front main skin 42 that constitutes a part of the front seat skin that covers the central front surface of the seat back pad 18, and a front seat skin that covers the side front surface of the seat back 12. It is divided into a front side skin 44 that constitutes a portion, and a seat back side skin 46 as a side seat skin that covers side surfaces of the lid 36 and the seat back 12 of the airbag device 14.

The seat cover 20 is made of a material such as knit that is relatively easy to stretch. The terminal 46A on the front side of the seat back side skin 46 is the front side skin 4
It is sewn with a terminal 44A on the outer side of 4 and a sewing thread 49. Terminal 44B inside the front side skin 44
Is a terminal 4 on the outside of the front main skin 42 together with a strip 49 having a loop-shaped cross section through which a suspending wire 47 is inserted into a vertical groove 45 formed in the seat back pad 18.
2A is sewn with a sewing thread 51.

The sewn portion 48 between the front end 46A of the seat back side skin 46 and the outer end 44A of the front side skin 44 is located near the front side of the front end edge 36A of the lid 36 of the airbag case 25. Therefore, when the airbag bag 32 is deployed, it is destroyed by the lid 36.

Inside the seat back side skin 46,
A cotton cloth 50 as a cloth that is difficult to stretch is provided. The cotton cloth 50 has a front end 50A tentatively sewn to the front end 46A of the seat back side skin 46 with a temporary fastening thread 52, and at the outer position thereof, the sewing thread 4
9 is sewn to the front side skin 44 together with the seat back side skin 46.

As shown in FIG. 2, the vertical width L of the cotton cloth 50
Is set to be substantially the same as the vertical length of the lid 36 of the airbag case 25. The terminal 50B on the rear side of the cotton cloth 50 is folded back together with the terminal 46B on the rear side of the seat back side skin 46 through a through hole 56 formed in the hook 54 as a locking member, and the folded-back portion is The main body is sewn with a sewing thread 55.
In addition, the terminal 46 on the rear side of the seat back side skin 46
B and a hook 54 attached to the terminal 50B on the rear side of the cotton cloth 50 are locked to the wire 21.

Reference numeral 60 in FIG. 1 indicates a part of the backboard attached to the back surface of the seat back.

Next, the operation of the first embodiment will be described.
In the seat structure including the side collision airbag device of the first embodiment, when the inflator 34 of the airbag device 14 is actuated during a side collision, the gas blown from the inflator 34 inflates the airbag bag body 32. To push and spread the lid 36 of the airbag case 25 in the direction of arrow A in FIG.

At this time, the cotton cloth 50 is integrally provided inside the seat back side skin 46, and the terminal 46B on the rear side of the seat back side skin 46 and the terminal 50B on the rear side of the cotton cloth 50 are connected via the hook 54. Since the wire bag 21 is connected to the wire 21, the stress due to the expansion of the airbag body 32, which tends to spread the lid 36 of the airbag case 25, is concentrated on the sewn portion 48 via the cotton cloth 50.

Therefore, as shown by the chain double-dashed line in FIG.
Since the sewn portion 48 can be instantly broken and the airbag 32 can be rapidly expanded, the material of the seat back side skin 20 is not limited to a material that is difficult to stretch.

Further, in the seat structure provided with the airbag apparatus for a side impact of the first embodiment, the cotton cloth 50 as the cloth which is difficult to stretch is arranged only on the inner side of the seat back side skin 46, so that it is comfortable to sit on. Is hard to influence.

Further, in the seat structure provided with the side impact airbag device of the first embodiment, as shown in FIG. 5, the seat back 12 moves to the rear of the vehicle and is located rearward of the center pillar garnish 60. Even when the collision airbag device 14 is located, the lid 36 of the airbag case 25 is
Since the sewn portion 48 is instantly destroyed after deployment, the airbag bag body 32 passes through the inside of the center pillar garnish 60 in the vehicle width direction as shown by the chain double-dashed line in FIG. Therefore, the airbag bag 32 can be smoothly deployed.

Further, in the seat structure provided with the side impact airbag device of the first embodiment, the terminal 50A on the front side of the cotton cloth 50 is attached to the terminal 46A on the front side of the seat back side skin 46 by the temporary fastening thread 52. Therefore, since the terminal 50A on the front side of the cotton cloth 50 is temporarily fixed to the terminal 46A on the front side of the seat back side skin 46 in advance, the outer position thereof is the same as in the conventional manufacturing process. Since the seat cover 20 is manufactured by sewing the seat back side cover 46 together with the seat back side cover 46 with the sewing thread 49, it is not necessary to significantly change the conventional manufacturing process, and thus the productivity is good.

Further, in the seat structure provided with the side impact airbag device of the first embodiment, the terminal 50B on the rear side of the cotton cloth 50 and the terminal 46B on the rear side of the seat back side skin 46 are assembled at the time of assembling. Attach the hook 54 to the wire 2
Since it suffices to lock it at 1, assembly workability is good.

The cloth which is difficult to stretch in the first embodiment is not limited to the cotton cloth 50. Further, in the seat structure including the side impact airbag device according to the first embodiment, as shown in FIG. 1, the rear end 50B of the cotton cloth 50 is connected to the wire 21 via the hook 54. The portion for fixing the terminal 50B on the rear side of 50 is not limited to the wire 21, and may be another seat-side fixing member such as the side portion 16A of the seatback frame 16.

Further, in the seat structure provided with the side impact airbag device of the first embodiment, as shown in FIG. 2, the rear end 50B of the cotton cloth 50 is connected to the rear side of the seat back side skin 46. Along with the terminal 46B, it was folded back through the through hole 56 formed in the hook 54 as a locking member, and the folded back portion was sewn to the main body portion with the sewing thread 55. The terminal 50B on the rear side of the cotton cloth 50 and the hook 54 The combination with the is not limited to this, and as shown in FIG.
0 back terminal 50B, seat back side skin 4
Along with the terminal 46B on the rear side of 6, the hook 54 as a locking member may be directly sewn with a sewing thread 55.

Further, in the seat structure provided with the side impact airbag device of the first embodiment, as shown in FIG. 2, the vertical width L of the cotton cloth 50 is set to the lid 3 of the airbag case 25.
6 was set to be approximately the same as the vertical length, but cotton cloth 5
The vertical width L of 0 is not limited to this, and as shown in FIG. 7, the length L1 is set to be shorter than the vertical length of the lid 36 of the airbag case 25, and the lid 36 is quickly moved. By disposing the cotton cloth 50 on the outer side of the portion to be deployed, when the lid 36 is deployed, the stress may be concentrated in a relatively narrow range in a relatively early time. On the other hand, a cotton cloth 50 as a cloth that is difficult to stretch may be arranged on the entire inner surface of the seat back side skin 46.

A cotton cloth 50, which is difficult to stretch, is set to be slightly longer than the seat back side skin 46, and both terminals are provided with a slack in advance so that the seat back side skin 46 is made.
By sewn on, the seat surface 20 can be easily fitted to the seat back pad 18 and the appearance can be improved. If the difference in length between the cotton cloth 50 and the seat back side skin 46 is, for example, about 10 mm, the deploying performance of the airbag bag 32 is hardly adversely affected.

Next, a second embodiment of the seat structure equipped with the side airbag according to the present invention will be described with reference to FIGS.

Note that the same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 8, in the seat structure provided with the airbag apparatus for side impact according to the second embodiment, the hook 54 attached to the terminal 50B on the rear side of the cotton cloth 50 as the cloth which is difficult to stretch has the seat side. Is fixed to the wire 70, which does not easily deform as a fixing member.

As shown in FIG. 9, this wire 70 is
Above the side portion 16A of the seat back frame 16,
It is welded, and the locking portion 70A is arranged substantially parallel to the wire 21.

As shown in FIG. 8, a mounting cloth 74 to which a hog ring 72 is attached is sewn to the terminal 46B on the rear side of the seat back side skin 46, and the hog ring 72 is locked to the wire 21. There is.

As shown in FIG. 10, the vertical length L of the cotton cloth 50 is shorter than the vertical length L2 of the airbag case 25, that is, the height L3 of the seat back 12.
It is set to be significantly smaller than
50D is unrestrained.

The terminal 50B on the rear side of the cotton cloth 50 and the terminal 46B on the rear side of the seat back side skin 46 are
It may be configured such that it is locked to one wire bent in a crank shape.

Next, the operation of the second embodiment will be described.
In the seat structure including the side impact airbag device of the second embodiment, when the inflator 34 of the airbag device 14 is actuated during a side impact, the gas ejected from the inflator 34 inflates the airbag bag body 32. Tries to push out the lid 36 of the airbag case 25.

At this time, the cotton cloth 50 is provided inside the seat back side skin 46, and the terminal 46B on the rear side of the seat back side skin 46 is locked to the wire 21 via the mounting cloth 74 having the hog ring 72. Since the terminal 50B on the rear side of the cotton cloth 50 is locked to the wire 70 via the hook 54, the stress due to the expansion of the airbag bag body 32 to try to spread the lid 36 of the airbag case 25, It acts on the sewn portion 48 directly through the cotton cloth 50. Also, the length L of the cotton cloth 50 in the vertical direction of the cotton cloth 50
However, since the height is set to be significantly smaller than the height L3 of the seat back 12, stress is applied to the front end 50 of the cotton cloth 50.
Focus on A.

Therefore, since the sewn portion 48 can be instantly broken and the airbag 32 can be rapidly expanded, the material of the seat back side skin 20 is not limited to a material that is difficult to stretch.

Further, in the seat structure provided with the side impact airbag device of the second embodiment, the cotton cloth 50 as the cloth which is difficult to stretch is arranged only in the extremely narrow area inside the seat back side skin 46. , It does not affect comfortably.

Further, in the seat structure provided with the side impact airbag device of the second embodiment, the rear end 50B of the cotton cloth 50, which is a non-stretchable cloth, is connected to the rear end 46B of the seat back side skin 46. Since the upper and lower sides 50C and 50D are unconstrained, wrinkles are unlikely to occur on the seat back side skin 46.

In the seat structure including the side collision airbag device according to the second embodiment, the seat having the backboard 60 attached to the back surface of the seat back 12 has been described. As shown in FIG. 11, the seat structure including the airbag device for a vehicle does not have a backboard, and a terminal 46B on the rear side of the seat back side skin 46 is provided.
Can also be applied to a seat sewn at the terminal 76A of the rear seat skin 76.

Next, a third embodiment of the seat structure provided with the side impact airbag device of the present invention will be described with reference to FIGS.

The same members as those in the second embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 12, in the seat structure including the side impact airbag device according to the third embodiment, a front end 46A of the seat back side skin 46 and an outer end 44A of the front side skin 44 are provided. The sewn portion 48 is provided with a bead 78. The bead 78 is for decoration to hide the seams to give a high-class feeling, and is composed of a bead core 80 and a bead cloth 82. The bead core 80 is made of vinyl chloride, has rigidity that does not depend on the seat cover when sewn, and does not break due to rubbing with an occupant when getting on and off, and can feel softness.

As shown in FIG. 13, the outermost first sewing thread 84 of the sewing portion 48 is the seat back side skin 46.
46A of the front side, 44A of the outside of the front side skin 44, 50A of the front side of the cotton cloth 50 and the beaded cloth 82 are sewn, and the second sewing thread 86 which is the inside of the first sewing thread 84 is sewn. Sew the front end 46A of the seat back side skin 46, the front end 50A of the cotton cloth 50, and the beaded cloth 82. The second sewing thread 86 has a higher strength or a smaller sewing pitch than the first sewing thread 84.

As shown in FIG. 14, the seat back 12
In the sewn portion 48 in which the bead 78 is disposed, the cotton cloth 50 is disposed within the range of the vertical width M of the airbag bag 32, and the terminal 50A on the front side of the cotton cloth 50 in the vertical direction. Is wider than the vertical width of the terminal 50B on the rear side and is at least half the vertical width M of the bag bag 32 or more, preferably M> L ≧ 0.6M. .

Next, the operation of the third embodiment will be described.
In the seat structure including the side impact airbag device according to the third embodiment, as shown in FIG. 12, when the inflator 34 of the airbag device 14 operates during a side impact, the inflator 3 is activated.
Due to the gas ejected from the air bag 4, the air bag body 32 expands and tries to push out the lid 36 of the air bag case 25.

At this time, the cotton cloth 50 is provided inside the seat back side skin 46, and the terminal 46B on the rear side of the seat back side skin 46 is locked to the wire 21 via the mounting cloth 74 having the hog ring 72. Since the terminal 50B on the rear side of the cotton cloth 50 is locked to the wire 70 via the hook 54, the stress due to the expansion of the airbag bag body 32 to try to spread the lid 36 of the airbag case 25, Directly concentrate on the sewn portion 48 via the cotton cloth 50.

In this case, the sewn portion 48 may be broken as follows. 1. When the first sewing thread 84 is broken at the sewing portion 48.

In this case, the second sewing thread 86 also causes the cotton cloth 50 to be sewn (the area L in FIG. 14) and the upper and lower parts whose cross section is shown in FIG.
Since the bead 78 is sewn on the seat back side skin 46, the bead 78 is attached to the seat back side skin 46 side.

Therefore, as shown in FIG. 16, the airbag bag body 32 does not bulge across the bead 78, and as shown in FIG. 17, the airbag bag body 32 has the front side of the bead 78. Expand to. Therefore, the expansion of the airbag bag 32 is not hindered by the bead 78.

2, the front side skin 4 at the sewing portion 48
When 4 breaks. In this case, the bead 78 is sewn to the seat back side skin 46 by the first sewing thread 84 also in the part where the cotton cloth 50 is sewn (the part in the range L in FIG. 14) and the upper and lower parts thereof. Because of the ball edge 7
8 is attached to the seat back side skin 46 side.

Therefore, as shown in FIG. 17, since the airbag bag body 32 expands to the front side of the bead 78, the bead 78 is formed.
Therefore, the deployment of the air bag body 32 is not hindered.

3. When the seat back side skin 46 is broken at the sewn portion 48. In this case, at the portion where the cotton cloth 50 is sewn (the portion in the range L in FIG. 14), the cotton cloth 50
Is sewn to the front side skin 44 by the first sewing thread 84, the airbag bag 32 cannot be deployed. However, at this portion, the second sewing thread 86 prevents the cotton cloth 50 and the bead 78 from breaking easily. Since it is sewn relatively strongly, the front side skin 44 always breaks next time.
Therefore, the bead 78 is attached to the seat back side skin 46 side.

Therefore, as shown in FIG. 17, since the airbag bag body 32 expands to the front side of the bead 78, the bead 78 is formed.
Therefore, the deployment of the airbag bag body 32 is not hindered.

On the other hand, in this case, above and below the portion where the cotton cloth 50 is sewn, as shown in FIG. 15, the cotton cloth 50 and the bead 78 which are hard to break are not strongly sewn by the second sewing thread 86. Next, the front side skin 44 is always broken, and the bead 78 is seated on the seat back side skin 4.
Although there is a possibility that it cannot be controlled so that the cotton cloth 50 is attached to the sixth side, in the third embodiment, the cotton cloth 50 is arranged within the range of the vertical width M of the airbag bag 32, and the front side of the cotton cloth 50 is arranged. The vertical width L of the side terminal 50A is set to be at least half the vertical width M of the bag bag body 32, preferably M> L ≧ 0.6M. As a result, the uncontrollable region (range N in FIG. 14) of the break mode is reduced, and the region where the cotton cloth 50 is sewn is dragged by the break mode, so that the bead 78 moves toward the seat back side skin 46 side. It becomes attached.

Therefore, as shown in FIG. 17, since the air bag body 32 expands to the front side of the bead 78, the bead 78 is formed.
Therefore, the deployment of the air bag body 32 is not hindered.

As described above, in the seat structure including the side collision airbag device of the third embodiment, the front end 46A of the seat back side skin 46 and the front side skin 4 are provided.
Even in a seat in which the bead 78 is arranged in the sewn portion 48 with the terminal 44A on the outer side of the No. 4, the sewn portion 48 can be instantly broken without being obstructed by the bead 78, and the airbag 32 can be quickly released. The material of the seat back side skin 20 is not limited to a material that is difficult to stretch because it can be deployed.

As shown in FIG. 18, the bead core 80
As shown in FIG. 16, the air bag body 3 is provided with at least one cutout 80A as a fragile portion.
If 2 bulges across the bead 78, cut 80
At A, the bead 78 is broken and the airbag bag body 32 is broken.
It is also possible to adopt a configuration in which the unfolded shape is as desired.

[0090]

According to the first aspect of the present invention, in the event of a side collision, the air bag device incorporated in the side portion of the seat back on the door side is actuated to break the sewn portion between the front seat skin and the side seat skin, and air is blown. In a seat structure including a side impact airbag device configured to deploy a bag bag between a vehicle body side portion and an occupant side portion, a cloth that is less stretchable than the side surface seat skin is provided inside the side seat skin. In addition to being provided integrally,
Since the terminal on the side opposite to the sewn portion of the fabric that is difficult to stretch is locked to the seat-side fixing member, the airbag for side impact can be deployed quickly and smoothly, and the material of the seat skin is limited. In addition, it has an excellent effect that there is no adverse effect on sitting comfort. According to a second aspect of the present invention, in the seat structure provided with the side airbag device according to the first aspect, one end of the cloth that is difficult to stretch is temporarily fixed to the side seat skin and at the outer position thereof. In addition to the effect according to claim 1, productivity is sewn to the front sheet skin together with the side sheet skin by the sewing thread, and the other end is fixed to the side sheet skin with the locking member attached. It has an excellent effect of being good.

The present invention according to claim 3 is the seat structure provided with the airbag device for side impact according to claim 2, wherein the locking member is locked to the wire fixed to the seat back frame. In addition to the effect of claim 2,
It has the excellent effect of good assembly workability.

According to a fourth aspect of the present invention, in the event of a side collision, the airbag device incorporated in the side portion of the seat back on the door side is actuated to destroy the sewn portion between the front seat skin and the side seat skin, and thereby the airbag bag. In a seat structure including a side impact airbag device configured to deploy a body between a vehicle body side portion and an occupant side portion, a cloth that is less stretchable than the side surface sheet skin is arranged inside the side seat skin. The front end of the non-stretchable cloth is fixed to the side seat skin, and the rear end is locked to the seat side fixing member, so that the airbag for side impact can be deployed quickly and smoothly. In addition, the material of the seat cover is not limited, and the seating comfort is not adversely affected. Further, it has an excellent effect that wrinkles are less likely to appear on the side sheet skin.

According to a fifth aspect of the present invention, in the seat structure provided with the side collision airbag device according to the fourth aspect, the front end of the cloth which is difficult to stretch is temporarily fixed to the side seat skin and its outer position. In addition to the effect according to claim 4, since the back end is sewn to the front seat skin together with the side seat skin by the sewing thread, and the rear end is locked to the seat side fixing member by the locking member, It has the excellent effect of good productivity and workability of assembly.

According to a sixth aspect of the present invention, in the seat structure provided with the side airbag device according to the first or fourth aspect, the cloth which is difficult to stretch is narrower than the vertical width of the airbag body. Since it is formed in a width band and is arranged at a position including the center line of the vertical width of the airbag bag, the deployment time can be further shortened in addition to the effect of claim 1 or claim 4. It has an excellent effect.

According to a seventh aspect of the present invention, in a seat structure provided with the side collision airbag device according to the first or fourth aspect, the front seat skin, the side seat skin, and the non-stretchable cloth are sewn portions. A bead formed of a beaded fabric and a beaded core sewn to and is provided, and the beaded remains at least on the side of the side sheet skin when the airbag bag swells in the region of the fabric which is difficult to stretch. In addition to the effects described in claim 4 or claim 4, it has an excellent effect that the airbag bag can be deployed as intended.

According to an eighth aspect of the present invention, in a seat structure provided with the airbag apparatus for side collision according to the seventh aspect, the beaded cloth is made of a front sheet skin, a side sheet skin, and a sewing thread for sewing a non-stretchable cloth. Is also sewn to the side seat skin and a fabric that is difficult to stretch by the second sewing thread at the seat inner position,
In addition to the effect described in claim 7, it has an excellent effect of good productivity.

According to a ninth aspect of the present invention, in the seat structure including the side impact airbag device according to the eighth aspect, the second sewing thread has a higher strength or a smaller sewing pitch than the sewing thread. In addition to the effect described in 8, it has an excellent effect that the deployment speed of the airbag bag can be easily adjusted.

According to a tenth aspect of the present invention, there is provided a seat structure including the side impact airbag device according to the seventh aspect.
Since the cloth which is difficult to stretch is arranged in a range of at least half the vertical width of the airbag bag within the vertical width of the airbag bag, in addition to the effect according to claim 7, It has an excellent effect that the airbag bag can be deployed in a short time.

The present invention according to claim 11 provides a seat structure comprising the airbag apparatus for side impact according to claim 7,
The bead has at least one fragile portion that breaks when the airbag bag swells in the range of the vertical width of the airbag bag body. Therefore, in addition to the effect according to claim 7, the airbag bag body can be used for a short time. It has an excellent effect that it can be deployed as intended.

[Brief description of drawings]

FIG. 1 is a horizontal cross-sectional view showing a side portion of a seat structure including a side impact airbag device according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a terminal on the rear side of the side seat skin of the seat structure including the side impact airbag device according to the first embodiment of the present invention.

FIG. 3 is an exploded perspective view showing a side portion of a seat back frame having a seat structure including the side collision airbag device according to the first embodiment of the present invention.

FIG. 4 is a perspective view showing a seat to which a seat structure including the airbag apparatus for side impact according to the first embodiment of the present invention is applied.

FIG. 5 is a horizontal cross-sectional view of the seat back showing the side portion of the seat structure including the side collision airbag device according to the first embodiment of the present invention when the seat back is moved rearward.

FIG. 6 is a perspective view showing a terminal on the rear side of a side seat skin of a seat structure including a side impact airbag device according to a modification of the first embodiment of the present invention.

FIG. 7 is a perspective view showing a terminal on the rear side of a side seat skin of a seat structure including a side impact airbag device according to a modification of the first embodiment of the present invention.

FIG. 8 is a horizontal cross-sectional view showing a side portion of a seat structure including a side impact airbag device according to a second embodiment of the present invention.

FIG. 9 is an exploded perspective view showing a side portion of a seat back frame having a seat structure including a side impact airbag device according to a second embodiment of the present invention.

FIG. 10 is a perspective view showing a seat to which a seat structure including an airbag apparatus for side impact according to a second embodiment of the present invention is applied.

FIG. 11 is a horizontal cross-sectional view showing a side portion of a seat structure including a side impact airbag device according to a modification of the second embodiment of the present invention.

FIG. 12 is a horizontal cross-sectional view showing a side portion of a seat structure including a side impact airbag device according to a third embodiment of the present invention.

13 is a sectional view taken along line 13-13 of FIG.

FIG. 14 is a side view showing a seat to which a seat structure including a side-impact airbag device according to a third embodiment of the present invention is applied.

FIG. 15 is a sectional view taken along the line 15-15 in FIG. 14;

FIG. 16 is a perspective view showing a state where the airbag bag body bulges across the ball edge.

FIG. 17 is a perspective view showing a state where the airbag bag bulges to the front side of the bead.

FIG. 18 is a perspective view showing a bead of a side impact airbag device according to a modification of the third embodiment of the present invention.

FIG. 19 is a schematic side view showing a seat structure including a side impact airbag device according to a conventional embodiment.

FIG. 20 is a horizontal cross-sectional view showing a side portion of a seat structure including a side impact airbag device according to a conventional embodiment.

[Explanation of symbols]

 10 Front Seat 12 Seat Back 14 Airbag Device for Side Impact 16 Seat Back Frame 20 Seat Back Skin 21 Metal Wire (Fixing Member on Seat Side) 25 Air Bag Case 32 Air Bag Bag 34 Inflator 36 Lid 42 Front Main Skin ( Front seat skin) 44 Front side skin (front seat skin) 44A Front side outer skin terminal 46 Seat back side skin (side seat skin) 46A Seat back side skin front end 46B Seat back side skin rear side Terminal 48 Sewing part 49 Sewing thread 50 Cotton cloth (non-stretchable cloth) 50A Terminal on the front side of cotton cloth 50B Terminal on the back side of cotton cloth 52 Temporary setting thread 54 Hook (locking member) 70 Wire (fixing member on seat side) 72 Hog ring 78 ball 80 Bead core 80A Cut (fragile part) 82 Bead fabric 84 First sewing thread 86 Second sewing thread

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigeharu Nakai 1 Toyota-cho, Toyota-shi, Aichi Toyota Motor Co., Ltd. (72) Masahito Kanehara 25, Kamifujiike, Yoshihara-cho, Toyota-shi, Aichi Arako Co., Ltd.

Claims (11)

[Claims] 1. At the time of a side collision, an airbag device incorporated in a door side portion of a seat back is actuated to break a sewn portion between a front seat skin and a side seat skin, and to dispose an airbag bag body and a passenger. In a seat structure including a side impact airbag device configured to be deployed between a side portion, inside the side sheet skin, integrally provided with a cloth that is less stretchable than the side sheet skin, and A seat structure provided with a side impact airbag device, characterized in that an end of a cloth which is difficult to stretch and which is opposite to the sewn portion is fixed to a seat side fixing member. 2. The non-stretchable cloth has one end temporarily fixed to the side seat skin and sewn to the front seat skin together with the side seat skin by a sewing thread at an outer position thereof, and the other end thereof. The seat structure including the side airbag device according to claim 1, wherein the seat member is fixed to the side seat skin with the locking member attached. 3. The seat structure having a side impact airbag apparatus according to claim 2, wherein the locking member is locked to a wire fixed to a seat back frame. 4. An airbag device incorporated in a door side portion of a seat back is actuated at the time of a side collision, and a sewn portion between a front seat skin and a side seat skin is destroyed to dispose an airbag bag body and a passenger. In a seat structure including a side impact airbag device configured to be deployed between a side portion, a fabric that is less stretchable than the side seat skin is disposed inside the side seat skin, and the stretch is difficult. A seat structure including an airbag device for side impact, characterized in that only a front end of a cloth is fixed to a side seat skin and a rear end of the cloth is locked to a seat side fixing member. 5. The front end of the non-stretchable cloth is temporarily fixed to the side seat skin and is sewn to the front seat skin together with the side seat skin by a sewing thread at an outer position thereof, and the rear end is engaged. The seat structure including the side-impact airbag device according to claim 4, wherein the seat member is locked to a seat-side fixing member by a stop member. 6. The non-stretchable cloth has a strip shape having a width narrower than a vertical width of the airbag bag body, and is arranged at a position including a center line of the vertical width of the airbag bag body. A seat structure comprising the side airbag device according to claim 1 or 4. 7. The sewn portion is provided with a bead formed of a bead cloth and a bead core sewn to the front sheet skin, the side sheet skin and the non-stretchable cloth, and the bead is The seat structure provided with the airbag apparatus for side impact according to claim 1 or 4, wherein at least the region of the cloth which is difficult to stretch remains on the side surface skin side when the airbag body swells. 8. The hem cloth is less stretchable with the side seat skin by a second sewing thread at a position inside the seat than a first sewing thread for sewing the front seat skin, the side seat skin and the stretch resistant cloth. The seat structure including the side airbag device according to claim 7, wherein the seat structure is sewn on cloth. 9. The seat structure provided with the airbag apparatus for side impact according to claim 8, wherein the second sewing thread has a higher strength or a smaller sewing pitch than the first sewing thread. 10. The non-stretchable cloth is arranged in at least a half or more of the vertical width of the airbag bag within the vertical width of the airbag bag. A seat structure including the airbag device for side impact according to 7. 11. The rim has at least one fragile portion that breaks when the airbag bag swells within a range of a vertical width of the airbag bag body.
A seat structure including the side airbag device described in the above.