JP3345279B2 - Seat structure with side collision airbag device - Google Patents

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 collision airbag device, and more particularly to a seat structure having a side collision airbag device built in a door side 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 one 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 is 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 accommodated 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.

[0004] Here, as shown in an enlarged scale in FIG. 20, the structure disclosed in this publication discloses a seat back 1 for expanding the lid 166 when the bag is inflated.
The 52 skins 168 are divided into a plurality of pieces and sewn. That is, the skin 168 of the seat back 152 is formed by 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 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. In this case, the sewing strength is set low by, for example, 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, and furthermore, the mutual loop-shaped rear end 176B and front end 178A are formed with sewing thread 186. It is sewn with. It should be noted that 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.

[0006] Therefore, when the bag 160 is expanded by the gas ejected from the inflator 158, the lid 166 is moved outward (in the direction of the arrow W in FIG. 20) around the hinge 166A formed at the rear end. ), And the sewing force at this time breaks 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.

[0007]

However, in the seat structure provided with the side-impact airbag device, when a relatively stretchable material such as a knit is used for the skin 168 of the seatback 152, the bag 160 is unfolded. Initially, as shown by the two-dot chain line in FIG.
By greatly extending to the outside in the sheet width direction, the sewn portion of the sewing thread 180, which should be broken, becomes hard to break, and the deployment speed of the airbag body 74 becomes slow, and the deployment shape of the bag 160 becomes unstable. Can be considered. For this reason, it is not possible to use a relatively easy-to-extend material such as a conventionally used knit for the seat skin, and the material of the seat skin is limited.

For the purpose of improving the appearance by making the seat skin easy to fit into the seat back (seat pad) and improving the sitting comfort, the front and side seat skins are made of a stretchable material. .

In consideration of the above facts, the present invention can quickly and smoothly deploy the side-impact airbag, does not limit the material of the seat skin, and does not adversely affect sitting comfort. It is an object to obtain a seat structure with a side collision airbag device.

[0010]

According to the first aspect of the present invention, at the time of a side collision, an airbag device incorporated in a side portion of a door of a seat back is operated to sew a sewing portion between a front seat skin and a side seat skin. In a seat structure provided with an airbag device for side collision configured to break and deploy an airbag body between a vehicle body side portion and an occupant side portion, the airbag is provided inside the side seat skin and the side door side than apparatus, the side fabric hardly stretch than said side seat skin
In addition to being provided along the face sheet skin, one end of the non-stretchable cloth is sewn to the sewn portion, and the opposite end of the non-stretchable cloth is locked to a seat-side fixing member.

Therefore, when the airbag device incorporated in the side of the door of the seatback frame is activated at the time of a side collision, the airbag bag is inflated and tries to push the seat cover. At this time, there is a cloth that is difficult to stretch along the side sheet skin inside the side sheet skin and closer to the side door than the airbag device. Since the terminal opposite to the terminal sewn on the sewn portion is locked to the fixing member on the seat side, even if a material that easily expands is used for the side sheet skin, the side sheet skin does not stretch much. Instead, the deployment force of the airbag bag is transmitted to the sewn portions of the front and side sheet skins without loss, and the sewn portions are relatively easily broken.

Therefore, according to the present invention, the side collision airbag body can be deployed quickly and smoothly, and the material of the seat skin is not limited, and there is no adverse effect on the 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, the one end of the non-stretchable cloth is temporarily fixed to the side sheet skin. The outer surface is sewn to the front sheet skin together with the side sheet skin by sewing threads, and the other end is fixed to the side sheet skin with a locking member attached.

Accordingly, in a state in which one end of the non-stretchable cloth is temporarily fixed to the side sheet skin in advance, the outside position thereof is sewn to the front sheet skin together with the side sheet skin by sewing threads in the same manner as in the conventional manufacturing process. Therefore, it is not necessary to significantly change the conventional manufacturing process for manufacturing the sheet skin.

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

Therefore, at the time of assembling, the assembling can be easily performed by engaging the engaging member attached to the side surface skin and the non-stretchable cloth with the wire fixed to the seat back frame.

According to a fourth aspect of the present invention, in the event of a side collision, the airbag device incorporated in the side of the door of the seatback is actuated to break the sewn portion between the front seat skin and the side seat skin, thereby reducing the airbag bag. In a seat structure provided with a side collision airbag device configured to deploy a body between a vehicle body side portion and an occupant side portion, inside the side seat skin and closer to a side door than the airbag device. Then, a cloth harder to stretch than the side sheet skin is applied along the side sheet skin.
In this case, only the front end of the hard-to-stretch cloth is fixed to the side sheet skin, and the rear end is locked by a fixing member on the seat side.

Therefore, on the side of the curved seat back, when the side sheet skin and the non-stretchable cloth are overlapped with each other and sewn around the periphery, and then wrapped around the seat back, the curved surface is formed according to the shape of the seat back. Then pulled in growth difficult cloth but wrinkle comes into the side seat cover, the side door side than the air bag device an inner side seat upholstery, side sheet, front stretch hard cloth than the side seat skin
By arranging along the skin, fixing only the front end of the non-stretchable cloth to the side sheet skin, and locking the rear end to the fixing member on the seat side, the upper and lower sides of the non-stretchable cloth and the rear end are on the side. The seat skin is not restrained, and wrinkles hardly appear on the side seat 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 sheet skin. The outer sheet is sewn to the front sheet skin together with the side sheet skin by a sewing thread, and the rear end is locked to a fixing member on the seat side by a locking member.

Therefore, in a state where the front end of the hardly stretchable cloth is temporarily fixed to the side sheet skin in advance, the outer position thereof is sewn to the front sheet skin together with the side sheet skin with sewing thread, similarly to the conventional manufacturing process. In addition, since the sheet skin is manufactured, it is not necessary to significantly change the conventional manufacturing process. Further, at the time of assembling, the locking member at the rear end may be formed on the fixing member on the seat side, and the assembling is easy.

According to a sixth aspect of the present invention, in the seat structure provided with the side-impact airbag device according to the first or fourth aspect, the non-stretchable cloth is larger than the vertical width of the airbag body. It is characterized in that it has a narrow band shape and is disposed at a position including the center line of the vertical width of the airbag body.

Therefore, since the width of the non-stretchable cloth is smaller than the vertical width of the airbag body and is disposed at a position including the center line of the vertical width of the airbag body, the airbag body bulges. The stress at the time is concentrated in a relatively narrow range including the center line of the vertical width of the airbag body at the sewing portion, and the sewing portion is easily broken.

According to a seventh aspect of the present invention, in the seat structure provided with the side collision airbag device according to the first or fourth aspect, the sewn portion includes the front seat skin and the side seat skin. A bead comprising a beaded cloth and a bead core sewn on the non-stretchable cloth is provided, and the bead is at least in the region of the non-stretchable cloth when the airbag body expands. It is characterized by remaining.

Therefore, when a side collision airbag device is mounted on a seat having a bead at a sewing portion of a front sheet skin, a side sheet skin, and a non-stretchable cloth, the airbag bag is provided from the rear side of the bead. There are cases where the body bulges and cases where the airbag bag bulges from the front side of the bead. The bag may swell while the airbag swells from the front of the bead. At this time, if the bead cannot be broken, the airbag bag may be caught by the bead and may not be able to secure a required deployed shape. However, in the present invention, the airbag is hardly stretched at least in a cloth region. When the bag is inflated, it remains on the skin of the side sheet, so that the airbag bag is deployed in a required deployment 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 includes the front sheet skin, the side sheet skin, and the non-stretchable cloth. The sewing machine is characterized in that the side sheet skin and the non-stretchable cloth are sewn by a second sewing thread at a position inside the sheet than a sewing position of the first sewing thread to be sewn .

Therefore, in the state where the bead is fixed in advance to the skin of the side sheet and the hardly stretchable cloth with the second sewing thread, the outside position of the sheet is set to the first sewing position in the same manner as in the conventional manufacturing process. Since the sheet skin is manufactured by sewing the front sheet skin together with the side sheet skin with a thread, there is no need to significantly change the conventional manufacturing process.

According to a ninth aspect of the present invention, in the seat structure provided with 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:

Accordingly, the deployment speed of the airbag body 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 provided within a range of at least half of the vertical width of the airbag bag within the range of the vertical width of the airbag bag.

Therefore, the uncontrollable region of the break mode when the airbag body is inflated is reduced, that is, the airbag body inflates from the rear side of the bead on the one hand and the other in the vertical position of the seat. Since the area where the airbag body may inflate from the front side of the bead is reduced, the airbag body can be deployed as intended and the air concentration is increased due to the stress concentration when the airbag body inflates. The bag bag can be quickly expanded to the outside of the seat skin.

According to the eleventh aspect of the present invention, in a seat structure provided with the side collision airbag device according to the seventh aspect,
The bead is within the range of the vertical width of the airbag bag,
It has at least one fragile portion that breaks when the airbag bag inflates.

Therefore, on the one hand, the airbag bag bulges from the rear side of the bead depending on the position in the seat vertical direction, and on the other hand,
When the airbag bag inflates from the front side of the bead, the bead breaks from the fragile portion, so that the inflation of the airbag bag is not disturbed by the bead and the airbag bag can be shortened. It can be deployed on time and on target.

[0033]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a seat structure provided with a side collision airbag device according to the present invention will be described with reference to FIGS.

As shown in FIG. 4, the front seat 10 of the first embodiment is provided as a seat cushion 11 on which an occupant sits, and is provided at the rear end of the seat cushion 11 so as to be tiltable and used as a backrest of the occupant. The seat back 12 and a headrest (not shown) 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
A seat back frame 16 assembled into a substantially rectangular frame shape to form a skeleton member, and a seat back pad attached to the front side of the seat back frame 16 and set to a predetermined hardness using a resin such as urethane. 18, and a seat back skin 20 that covers the surface of the seat back pad 18.

Further, the side door 2 of the seat back 12
An airbag device 14 for side collision is built in the two side portions. In FIG. 1, a door inner panel 26 and a door trim 28 which constitute a part of the side door 22 are shown.
Only one is shown.

As shown in FIG. 3, a bolt 15 is provided upright on the side collision airbag device 14, and the bolt 15 and the nut 17 are used by the side collision airbag device 14.
Is mounted on the side portion 16A of the seat back 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 disposed along a 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 27 of No. 5,
The claw portion 27A is engaged with a notch 16B formed in the side portion 16A of the seat back frame 16.

A folded airbag bag 32 is stored in the airbag case 25, and the inflator storage unit 2 is recessed toward the inside of the seat at the bottom of the base 27.
7B, a cylindrical inflator 34 is provided.
In addition, the inflator 34 is disposed inside the airbag bag 32.

As the inflator 34, a gas generating agent-sealed type or a high-pressure gas-sealed type may be used. Briefly describing a configuration example of the inflator 34, in the case of the former type,
A cylindrical housing with a bottom having a plurality of gas ejection ports formed on a peripheral surface, a gas generating agent disposed in the housing to generate gas by burning, and debris after burning of the gas generating agent. The filter includes a filter to be removed, and an electric ignition type ignition device mounted on an end of the housing on the opening side to burn 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. In addition, an airbag device 1 for side collision
In No. 4, a high-pressure gas-filled inflator is often used because an airbag body 32 described later is relatively small and gas volume may be small.

The outside of the airbag case 25 is a lid 36. The lid 36 is provided with the airbag 3
When the airbag case 2 is deployed, the airbag case 25 is deployed toward the outside of the seat (in the direction of the arrow A in FIG. 1) around the hinge portion 38 formed at the rear end of the airbag case 25.

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

The sheet skin 20 is made of a material that is relatively easily stretched, such as a knit. The terminal 46A on the front side of the seat back side skin 46 is the front side skin 4
4 and a sewing thread 49 for sewing. Terminal 44B inside front side skin 44
The terminal 4 on the outer side of the front main skin 42 together with a band 49 having a loop-shaped cross section through which a wire 47 for hanging from a vertical groove 45 formed in the seat back pad 18 is inserted.
The sewing thread 2A is sewn with a sewing thread 51.

The sewn portion 48 of the terminal 46A on the front side of the seat back side skin 46 and the terminal 44A outside the front side skin 44 is located near the front side of the front edge 36A of the lid 36 of the airbag case 25. When the airbag bag 32 is deployed, it is broken by the lid 36.

Inside the seat back side skin 46,
A cotton cloth 50 as a hardly stretchable cloth is provided. The front end 50A of the cotton cloth 50 is tentatively sewn to the front end 46A of the seat back side skin 46 with the temporary fastening thread 52, and the sewing thread 4
9 is sewn on 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
Is set to be substantially the same as the length of the lid 36 of the airbag case 25 in the vertical direction. The terminal 50B on the rear side of the cotton cloth 50, together with the terminal 46B on the rear side of the seat back side skin 46, is folded back through a through hole 56 formed in a hook 54 as a locking member. The main body is sewn with sewing thread 55.
Also, a terminal 46 on the rear side of the seat back side skin 46.
B and a hook 54 attached to a terminal 50 </ b> B 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 of the seat back.

Next, the operation of the first embodiment will be described.
In the seat structure provided with the side collision airbag device of the first embodiment, when the inflator 34 of the airbag device 14 operates at the time of a side collision, the airbag bag body 32 is inflated by the gas ejected from the inflator 34. 1 to push the lid 36 of the airbag case 25 in the direction of arrow A in FIG.

At this time, a cotton cloth 50 is integrally provided inside the seat back side skin 46, and a rear end 46 B of the seat back side skin 46 and a rear end 50 B of the cotton cloth 50 are connected via a hook 54. Since the airbag bag 32 is connected to the wire 21, the stress for pushing and expanding the lid 36 of the airbag case 25 due to the inflation of the airbag bag body 32 concentrates on the sewing portion 48 via the cotton cloth 50.

Therefore, as shown by the two-dot chain line in FIG.
Since the sewing portion 48 can be instantaneously destroyed and the airbag bag 32 can be quickly deployed, the material of the seat back side skin 20 is not limited to a material that is not easily stretched.

In the seat structure provided with the side collision airbag device according to the first embodiment, the cotton cloth 50 as a non-stretchable cloth is disposed only inside the seat back side skin 46, so that the seating comfort is improved. Is hard to influence.

In the seat structure provided with the side collision airbag device of the first embodiment, as shown in FIG. 5, the seat back 12 moves rearward of the vehicle, and is positioned rearward of the center pillar garnish 60. Even when the collision airbag device 14 is located, the lid 36 of the airbag case 25
After the deployment, the sewn portion 48 is instantaneously destroyed, so that the airbag bag 32 is deployed forward of the vehicle through the center pillar garnish 60 in the vehicle width direction as shown by a two-dot chain line in FIG. Therefore, the airbag bag 32 can be deployed smoothly.

In the seat structure provided with the side collision airbag device of the first embodiment, the terminal 50A on the front side of the cotton cloth 50 is temporarily attached to the terminal 46A on the front side of the seat back side skin 46 by a temporary fastening thread 52A. As a result, 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, and the outer position thereof is set in the same manner as in the conventional manufacturing process. Since the seat skin 20 is manufactured by sewing the front side skin 44 together with the seat back side skin 46 with the sewing thread 49, there is no need to significantly change the conventional manufacturing process, so that productivity is high.

In the seat structure provided with the side collision 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 attached at the time of assembly. Connect the hook 54 attached to the wire 2
Since it suffices to lock at 1, the assembly workability is good.

The non-stretchable cloth according to the first embodiment is not limited to the cotton cloth 50. Further, in the seat structure provided with the side collision airbag device of the first embodiment, as shown in FIG. 1, the terminal 50B on the rear side 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 the 50 is not limited to the wire 21 and may be another fixing member on the seat side such as the side portion 16A of the seat back frame 16.

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

Further, in the seat structure provided with the side collision airbag device according to the first embodiment, as shown in FIG.
6 was set to be approximately the same as the vertical length of the
The vertical width L of 0 is not limited to this. 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 By arranging the cotton cloth 50 outside the portion to be deployed, when the lid 36 is deployed, the stress may be concentrated in a relatively narrow range at a relatively early time. On the other hand, a cotton cloth 50 as a non-stretchable cloth may be provided on the entire inner surface of the seat back side skin 46.

Further, a cotton cloth 50 as a hardly stretchable cloth is set to be slightly longer than the seat back side skin 46, and a slack is provided in advance so that both ends of the seat back side skin 46 are provided.
By sewing, the seat skin 20 can be easily fitted to the seat back pad 18 and the appearance can be improved. If the difference between the length of the cotton cloth 50 and the length of the seat back side skin 46 is, for example, about 10 mm, there is almost no adverse effect on the deployment performance of the airbag bag 32.

Next, a second embodiment of the seat structure provided with the side airbag device of 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 device for side collision according to the second embodiment, the hook 54 attached to the terminal 50B on the rear side of the cotton cloth 50, which is a non-stretchable cloth, is connected to the seat side. Is fixed to a wire 70 which is hard to deform as a fixing member.

As shown in FIG. 9, this wire 70
On the upper part of the side part 16A of the seat back frame 16,
The locking portion 70 </ b> A is welded and disposed substantially parallel to the wire 21.

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

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.
Is set to be significantly smaller than that of the upper and lower sides 50C,
50D is unrestricted.

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 is also possible to adopt a configuration in which one wire bent into a crank shape is engaged with the other wire.

Next, the operation of the second embodiment will be described.
In the seat structure provided with the side collision airbag device of the second embodiment, when the inflator 34 of the airbag device 14 operates at the time of a side collision, the airbag bag 32 is inflated by gas ejected from the inflator 34. The lid 36 of the airbag case 25 is pushed to spread.

At this time, the cotton cloth 50 is provided inside the seat back side skin 46, and the terminal 46 B 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 rear end 50B of the cotton cloth 50 is locked to the wire 70 via the hook 54, the stress for pushing and expanding the lid 36 of the airbag case 25 due to the expansion of the airbag bag body 32 is: It acts directly on the sewing portion 48 via the cotton cloth 50. The length L of the cotton cloth 50 in the vertical direction is
However, since the stress is set to be significantly smaller than the height L3 of the seat back 12, stress is applied to the terminal 50 on the front side of the cotton cloth 50.
Focus on A.

Accordingly, the sewing portion 48 can be instantaneously destroyed and the airbag bag 32 can be quickly deployed, so that the material of the seat back side skin 20 is not limited to a material that is not easily stretched.

Further, in the seat structure provided with the side airbag device of the second embodiment, the cotton cloth 50 as the hardly stretchable cloth is arranged only in a very narrow area inside the seat back side skin 46. It is hard to affect sitting comfort.

Further, in the seat structure provided with the airbag device for side collision according to the second embodiment, the terminal 50B on the rear side of the cotton cloth 50 as the non-stretchable cloth is replaced with the terminal 46B on the rear side of the seat back side skin 46. And the upper and lower sides 50C and 50D are unconstrained, so that wrinkles hardly occur on the seat back side skin 46.

In the seat structure provided with the side collision airbag device according to the second embodiment, the seat having the back board 60 attached to the back of the seat back 12 has been described. As shown in FIG. 11, the seat structure provided with the airbag device for use has no backboard, and a terminal 46B on the rear side of the seat back side skin 46.
Can also be applied to a sheet sewn to the terminal 76A of the rear sheet skin 76.

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

Note that the same members as those of the second embodiment are denoted by the same reference numerals, and description thereof is omitted.

As shown in FIG. 12, in the seat structure provided with the side collision airbag device of the third embodiment, a terminal 46A on the front side of the seat back side skin 46 and a terminal 44A on the outside of the front side skin 44 are provided. The bead 78 is disposed on the sewing portion 48 of the sewn portion. The bead 78 is for decoration for hiding seams and giving a sense of quality, and is composed of a bead core 80 and a bead cloth 82. The bead core 80 is made of polyvinyl chloride, has a rigidity that does not depend on the seat skin and is sewn, and does not break due to rubbing with an occupant during 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 attached to the seat back side skin 46.
Of the front side 46A, the outer side 44A of the front side skin 44, the front side 50A of the cotton cloth 50, and the ball cloth 82, and the second sewing thread 86 inside the first sewing thread 84. Has sewn a terminal 46A on the front side of the seat back side skin 46, a terminal 50A on the front side of the cotton cloth 50, and a ball 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 sewing portion 48 where the bead 78 is disposed, the cotton cloth 50 is disposed within the range of the vertical width M of the airbag bag body 32, and the vertical direction of the terminal 50A on the front side of the cotton cloth 50. Is larger than the width in the vertical direction of the terminal 50B on the rear side, and is set in a range of at least half or more of the width M in the vertical direction of the bag bag body 32, preferably, M> L ≧ 0.6M. .

Next, the operation of the third embodiment will be described.
In the seat structure provided with the side collision airbag device of the third embodiment, as shown in FIG. 12, when the inflator 34 of the airbag device 14 operates during a side collision, the inflator 3
The gas ejected from the airbag 4 causes the airbag bag body 32 to inflate to push and spread the lid 36 of the airbag case 25.

At this time, a cotton cloth 50 is provided inside the seat back side skin 46, and a terminal 46 B on the rear side of the seat back side skin 46 is locked to the wire 21 via a mounting cloth 74 having a hog ring 72. Since the rear end 50B of the cotton cloth 50 is locked to the wire 70 via the hook 54, the stress for pushing and expanding the lid 36 of the airbag case 25 due to the expansion of the airbag bag body 32 is: It concentrates directly on the sewing part 48 via the cotton cloth 50.

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

In this case, the second sewing thread 86 is used to sew the portion where the cotton cloth 50 is sewn (the portion in the range L in FIG. 14) and the portions above and below the cross section 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.

Accordingly, as shown in FIG. 16, the airbag bag 32 does not inflate across the bead 78, and as shown in FIG. Expand to Therefore, the deployment 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 on the seat back side skin 46 by the first sewing thread 84 at the portion where the cotton cloth 50 is sewn (the portion in the range L in FIG. 14) and the upper and lower portions thereof. Because of the bead 7
8 is in a state attached to the seat back side skin 46 side.

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

3. When the seat back side skin 46 is broken at the sewing portion 48. In this case, at the part where the cotton cloth 50 is sewn (the part in the range L in FIG. 14), the cotton cloth 50 is sewn.
Is sewn to the front side skin 44 by the first sewing thread 84, so that the airbag bag body 32 cannot be deployed. However, in this portion, the cotton fabric 50 and the bead 78 that are difficult to break are Since the sewing is relatively strong, the front side skin 44 always breaks.
Therefore, the bead 78 is attached to the seat back side skin 46 side.

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

On the other hand, in this case, 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 above and below the portion where the cotton cloth 50 is sewn. Next, the front side skin 44 is necessarily broken, and the bead 78 is moved to the seat back side skin 4.
Although it may not be possible to control it so as to be attached to the sixth side, in the third embodiment, the cotton cloth 50 is disposed within the range of the vertical width M of the airbag bag body 32 and the cotton cloth 50 is located in front of the cotton cloth 50. The width L of the side terminal 50A in the vertical direction is set to be at least half or more of the width M of the bag bag body 32 in the vertical direction, preferably, M> L ≧ 0.6M. As a result, the uncontrollable region (range N in FIG. 14) in the break mode is reduced, and the ball 78 is moved to the break mode of the portion where the cotton cloth 50 is sewn, so that the bead 78 is moved toward the seat back side skin 46 side. It will be attached.

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

As described above, in the seat structure provided with the side collision airbag device of the third embodiment, the terminal 46A on the front side of the seat back side skin 46 and the front side skin 4
Even in a sheet in which the bead 78 is disposed on the sewn portion 48 with the terminal 44A outside the sewing machine 4, the sewn portion 48 can be instantaneously destroyed without being disturbed by the bead 78, and the airbag bag body 32 can be quickly moved. Since the seat back side skin 20 can be deployed, the material of the seat back side skin 20 is not limited to a material that is not easily stretched.

Note that, as shown in FIG.
A notch 80A or the like as at least one fragile portion is inserted into the airbag bag 3 as shown in FIG.
When 2 bulges over the bead 78, the cut 80
In A, the bead 78 is broken and the airbag bag 32
May be configured to have the desired expanded shape.

[0090]

According to the first aspect of the present invention, when a side collision occurs, the airbag device incorporated in the side of the door of the seat back is actuated to break the sewn portion between the front seat skin and the side seat skin, thereby providing air. In a seat structure including a side collision airbag device configured to deploy a bag bag body between a vehicle body side portion and an occupant side portion, inside the side seat skin and closer to the side door than the airbag device. In addition, a cloth that is less stretchable than the side sheet skin is provided along the side sheet skin, and one end of the non-stretch cloth is sewn to a sewn portion, and the other end of the non-stretch cloth is engaged with the seat-side fixing member. As a result, the side airbag body can be quickly and smoothly deployed, and there is an excellent effect that the material of the seat skin is not limited and the seat comfort is not adversely affected.

According to a third aspect of the present invention, in the seat structure provided with the side collision airbag device according to the second aspect, the locking member is locked by the wire fixed to the seat back frame. , In addition to the effect of claim 2,
It has an excellent effect that assembly workability is good.

According to a fourth aspect of the present invention, in the event of a side collision, the airbag device incorporated in the side of the door of the seat back is actuated to break the sewn portion between the front seat skin and the side seat skin to break the airbag bag. In a seat structure provided with a side collision airbag device configured to deploy the body between the vehicle body side portion and the occupant side portion, inside the side seat skin and on the side door side than the airbag device, Since a cloth that is less stretchable than the side sheet skin is arranged along the side sheet skin, and only the front end of the hardly stretchable cloth is fixed to the side sheet skin, and the rear end is locked by the seat-side fixing member. In addition, the airbag bag for side collision can be deployed quickly and smoothly, and there is an excellent effect that the material of the seat skin is not limited and the seating comfort is not adversely affected. Moreover, it has an excellent effect that wrinkles hardly appear on the skin of the side sheet.

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 sheet skin, and the outside position thereof is set. With the sewing thread, the front sheet skin is sewn together with the side sheet skin, and the rear end is locked by a locking member on the seat side with a locking member. It has an excellent effect that productivity and assembling workability are good.

According to a sixth aspect of the present invention, in the seat structure provided with the side-impact airbag device according to the first or fourth aspect, the non-stretchable cloth is narrower than the vertical width of the airbag body. Since the airbag bag is formed in a position including the center line of the vertical width of the airbag body, the deployment time can be further shortened in addition to the effects described in claim 1 or 4. It has an excellent effect.

According to a seventh aspect of the present invention, there is provided a seat structure provided with a side collision airbag device according to the first or fourth aspect, wherein the sewing portion has a front sheet skin, a side sheet skin and a non-stretchable cloth. And a bead comprising a beaded cloth and a bead core sewn on the side sheet surface side when the airbag body is inflated at least in a cloth region which is hardly stretched. In addition to the effects described in the description or the fourth aspect, there is an excellent effect that the airbag bag can be deployed as intended.

According to an eighth aspect of the present invention, in the seat structure provided with the side-impact airbag device according to the seventh aspect, the bead cloth is a first sewn sewing of a front sheet skin, a side sheet skin and a hardly stretchable cloth. Since the second sheet is sewn to the side sheet skin and the non-stretchable cloth by the second sewing thread at the inner position of the sheet from the sewing position of the thread , in addition to the effect of claim 7, there is an excellent effect that the productivity is good. .

According to the ninth aspect of the present invention, in the seat structure provided with the side collision 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 effects described in the item 8, there is 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 provided with the side collision airbag device according to the seventh aspect,
The non-stretchable cloth is disposed in a range of at least half or more of the vertical width of the airbag bag within the range of the vertical width of the airbag bag. It has an excellent effect that the airbag bag can be deployed in a short time.

According to the eleventh aspect of the present invention, there is provided a seat structure provided with the side airbag device according to the seventh aspect,
Since the bead has at least one fragile portion that breaks when the airbag inflates within the range of the vertical width of the airbag, the effect of the airbag is shortened in addition to the effect of claim 7. It has an excellent effect that it can be deployed as intended.

[Brief description of the drawings]

FIG. 1 is a horizontal sectional view showing a side portion of a seat structure provided with a side collision airbag device according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a terminal on a rear side of a side sheet skin of a seat structure provided with a side collision 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 provided with 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 provided with the side collision airbag device according to the first embodiment of the present invention is applied.

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

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

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

FIG. 8 is a horizontal sectional view showing a side portion of a seat structure provided with a side collision airbag device according to a second embodiment of the present invention.

FIG. 9 is an exploded perspective view showing a side portion of a seatback frame having a seat structure provided with a side collision 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 provided with a side collision airbag device according to a second embodiment of the present invention is applied.

FIG. 11 is a horizontal sectional view showing a side portion of a seat structure provided with a side collision airbag device according to a modification of the second embodiment of the present invention.

FIG. 12 is a horizontal sectional view showing a side portion of a seat structure provided with a side collision airbag device according to a third embodiment of the present invention.

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

FIG. 14 is a side view showing a seat to which a seat structure provided with a side collision 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 in which the airbag bag bulges over the bead.

FIG. 17 is a perspective view showing a state in which the airbag bag is inflated to the front side of the bead.

FIG. 18 is a perspective view showing a bead of a side collision 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 collision airbag device according to a conventional embodiment.

FIG. 20 is a horizontal sectional view showing a side portion of a seat structure provided with a side collision airbag device according to a conventional embodiment.

[Explanation of symbols]

 Reference Signs List 10 front seat 12 seat back 14 airbag device for side collision 16 seatback frame 20 seatback skin 21 metal wire (seat-side fixing member) 25 airbag case 32 airbag bag body 34 inflator 36 lid 42 front main skin ( Front seat skin 44 Front side skin (front seat skin) 44A Terminal outside front side skin 46 Seat back side skin (side seat skin) 46A Terminal on front side of seat back side skin 46B Rear side of seat back side skin 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 rear side of cotton cloth 52 Temporary fastening thread 54 Hook (locking member) 70 Wire (sheet side fixing member) 72 Hogling 78 Ball 80 Bead core 80A Cut (fragile part) 82 Bead cloth 84 First sewing thread 86 Second sewing thread

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shigeharu Nakai 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Automobile Co., Ltd. (72) Inventor Masahito Kanehara 25, Kamifike, Yoshiwara Town, Toyota City, Aichi Prefecture Araco Corporation (56) References JP-A-9-39711 (JP, A) JP-A-9-123860 (JP, A) JP-A-9-71205 (JP, A) JP-A-9-71212 (JP, A) JP-A-9-123861 (JP, A) JP-A-9-202205 (JP, A) JP-A-9-254735 (JP, A) JP-A-9-71204 (JP, A) JP-A 8-258660 (JP, A) JP-A-6-64491 (JP, A) JP-A-3-87500 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60R 21/20 B60N 2 / 42

Claims (11)

(57) [Claims] When a side collision occurs, an airbag device incorporated in a door side of a seat back is actuated to break a sewn portion between a front seat skin and a side seat skin so that an airbag bag body is moved to a vehicle body side and an occupant. In a seat structure provided with a side collision airbag device configured to be deployed between the side seat and the side seat skin, inside the side seat skin and closer to the side door than the airbag device. Along with providing the side sheet skin with hard-to-stretch cloth,
A seat provided with a side collision airbag device, wherein one end of the non-stretchable cloth is sewn to the sewn portion, and the opposite end of the non-stretchable cloth is locked to a seat-side fixing member. Construction. 2. The non-stretchable cloth has one end temporarily fixed to the side sheet skin, and is sewn to the front sheet skin together with the side sheet skin by a sewing thread at an outer position, and the other end is formed. A seat structure provided with a side collision airbag device according to claim 1, wherein the side surface is fixed to the side seat skin in a state where a locking member is attached. 3. The seat structure provided with a side collision airbag device 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 of a seat back at the time of a side collision is actuated to break a sewn portion between a front seat skin and a side seat skin, thereby moving the airbag bag body to a vehicle body side and an occupant. In a seat structure provided with a side collision airbag device configured to be deployed between the side seat and the side seat skin, inside the side seat skin and closer to the side door than the airbag device. A cloth that is not easily stretched is arranged along the side sheet skin , and only the front end of the hardly stretchable cloth is fixed to the side sheet skin, and the rear end is locked by a fixing member on the seat side. A seat structure provided with a side collision airbag device. 5. A front end of the non-stretchable cloth is temporarily fixed to the side sheet skin, and is sewn to the front sheet skin together with the side sheet skin by a sewing thread at a position outside the front end. The seat structure provided with the side collision airbag device according to claim 4, wherein the stopping member is locked to a fixing member on the seat side. 6. The non-stretchable cloth is formed in a band shape having a width narrower than the vertical width of the airbag body, and is disposed at a position including a center line of the vertical width of the airbag body. A seat structure provided with the side collision airbag device according to claim 1 or 4. 7. The sewing portion is provided with a bead made of a bead cloth and a bead core sewn on the front sheet skin, the side sheet skin, and the non-stretchable cloth, and the bead is The seat structure according to claim 1 or 4, wherein at least the hardly stretchable cloth remains on the side of the side sheet when the airbag body is inflated. 8. The side sheet skin by means of a second sewing thread at a position inside the seat relative to a sewing position of a first sewing thread for sewing the front sheet skin, the side sheet skin, and the non-stretchable cloth. The seat structure provided with the side collision airbag device according to claim 7, sewn on the hard-to-stretch cloth. 9. The seat structure 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 disposed within a range of at least half of the vertical width of the airbag bag within the range of the vertical width of the airbag bag. A seat structure provided with the side collision airbag device according to claim 7. 11. The airbag according to claim 7, wherein the bead has at least one fragile portion that breaks when the airbag inflates within the range of the vertical width of the airbag.
A seat structure provided with the side collision airbag device described in the above.