JP2014201080A - Seat structure provided with side airbag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat structure provided with a side airbag device in which a sewing part of a front side epidermis and a side epidermis can be broken at an earlier stage compared with the conventional.SOLUTION: Provided is a movement suppression structure 60 which suppresses relative movement between a door 22 of a resin case 20 and a side epidermis 13. Therefore, generation of relative movement (slipping) between the door 22 and the side epidermis 13 can be suppressed when the door 22 of the case 20 opens by being pressed through the expanding airbag 30, compared with the case of no movement suppression structure 60 (the conventional). As a result, expansion force of the door by the airbag 30 is transmitted to the side epidermis 13 effectively, and the side epidermis 13 can be pulled effectively by utilizing the expansion force of the door 22. Thus, a sewing part 14 of a front side epidermis 12 and the side epidermis 13 can be broken more quickly compared with the conventional, and the airbag 30 can be expanded between an occupant and the cabin side part.

Description

  The present invention relates to a seat structure provided with a side airbag device.

In Patent Document 1, a cloth (strength cloth) that is harder to extend than the side skin is provided along the side skin on the side door side than the case that houses the side airbag device inside the side skin. Disclosed is a seat structure including a side airbag device in which one terminal is sewn to a sewing portion between a front side skin and a side skin, and a terminal on the opposite side of the baffle is locked to a seat-side fixing member. .

However, the conventional seat structure provided with the side airbag device has the following problems.
When the case door is opened by being pushed by the inflating airbag, a relative movement (slip) occurs between the case door and the webbing covering the door. As a result, there is room for improvement in that the deployment force of the door by the air bag is effectively transmitted to the blanket, and the sewn portion between the front side skin and the side skin is quickly broken.

Japanese Patent No. 3345279

  The objective of this invention is providing the seat structure provided with the side airbag apparatus which can break | disconnect the sewing part of a front side skin and a side skin early compared with the former.

The present invention for achieving the above object is as follows.
(1) [First to fourth embodiments]
The seat structure provided with the side airbag device of the present invention has a sewing part between the front side skin and the side skin when the airbag is housed in a resin case attached to the side frame of the seat back and at the time of side collision or prediction of side collision. It is a seat structure provided with a side airbag device that is broken and deployed.
The resin case includes a base portion fixed to the side frame, and a door that opens outward in the vehicle width direction by the inflating airbag.
A movement suppression mechanism that suppresses relative movement between the door and the side skin is provided.
(2) [First to fourth embodiments]
In the above (1), the door is configured to open around a hinge portion provided at the vehicle rear end portion of the door.
The movement suppression mechanism includes a door-side mechanism provided on the door and a skin-side mechanism provided on the side skin, and the door-side mechanism is provided on at least a vehicle front side end portion of the door. Yes.
(3) [First and second embodiments]
In the above (2), the door side mechanism is an engaging portion, and the skin side mechanism is an engagement receiving portion to which the engaging portion can be engaged.
(4) [First embodiment]
In the above (3), the engagement portion is a hook provided on the door, and the engagement receiving portion is a loop provided on the back surface of the side skin.
(5) [First embodiment]
In the above (4), a plurality of the hooks are provided in the door with an interval in the vertical direction, and the loops have a plurality in the vertical direction on the side skin corresponding to the hook, and A plurality of rows are provided in the vehicle front-rear direction.
(6) [Second Embodiment]
In the above (3), the engagement portion is a first surface fastener made of one of a male side and a female side, and the engagement receiving portion is made of the other of the male side and the female side, and the back surface of the side skin It is the 2nd surface fastener provided in.
(7) [Third and fourth embodiments]
In the above (2), the door-side mechanism is a first friction coefficient increasing portion that comes into contact with the skin-side mechanism with an increased friction coefficient, and the skin-side mechanism has an increased friction coefficient and is on the door side It is the 2nd friction coefficient increase part which contacts a mechanism.

According to the seat structure including the side airbag device of (1) above, the movement suppression mechanism is provided because the movement suppression mechanism that suppresses relative movement between the door of the resin case and the side skin is provided. Compared to the case where there is no case (conventional), when the case door is opened by being pushed by the inflating airbag, the relative movement (slip) between the case door and the side skin covering the door is suppressed. it can. As a result, the deployment force of the door by the airbag is effectively transmitted to the side skin, and the side skin can be effectively pulled using the deployment force of the door. Therefore, the sewing portion between the front side skin and the side skin can be quickly broken as compared with the conventional case, and the airbag can be deployed between the occupant and the passenger compartment side.

According to the seat structure provided with the side airbag device of (2) above, the door is configured to open around the hinge portion provided at the vehicle rear side end portion of the door, and the door side of the movement suppressing mechanism Since the mechanism is provided at least at the vehicle front side end of the door, the door side mechanism at the time of inflation of the airbag is compared with the case where the door side mechanism of the movement suppressing mechanism is not provided at the vehicle front side end of the door. The amount of movement is increased, and the side skin can be effectively pulled using the unfolding force of the door (the amount of pulling can be increased).

According to the seat structure provided with the side airbag device of (3) above, the door side mechanism is an engagement portion, and the skin side mechanism is an engagement receiving portion to which the engagement portion can be engaged. The engagement between the engagement portion and the engagement receiving portion can surely suppress the relative movement between the door and the side skin.

According to the seat structure including the side airbag device of (4) above, the engaging portion is a hook provided on the door, and the engagement receiving portion is a loop provided on the back surface of the side skin. By engaging (hooking) with the loop, it is possible to suppress relative movement between the door and the side skin.

  According to the seat structure provided with the side airbag device of (5) above, a plurality of hooks are provided at intervals in the vertical direction on the door, and a loop is provided on the side skin in the vertical direction corresponding to the hook. Since the plurality of rows are provided at intervals and in a plurality of rows in the vehicle front-rear direction, the robustness in the engagement between the hook and the loop can be improved.

  According to the seat structure including the side airbag device according to (6), the engaging portion is the first surface fastener including one of the male side and the female side, and the engaging receiving portion is the male side and the female side. Since it is the 2nd surface fastener which consists of the other of the side and is provided in the back surface of a side skin, it can suppress that a relative movement generate | occur | produces between a door and a side skin using a surface fastener structure.

  According to the seat structure provided with the side airbag device of (7) above, the door side mechanism is a first friction coefficient increasing portion that comes into contact with the skin side mechanism by increasing the friction coefficient, and the skin side mechanism is Since the friction coefficient is increased and the second friction coefficient increasing portion comes into contact with the door side mechanism, the first and second friction coefficient increasing portions suppress the occurrence of relative movement between the door and the side skin. it can.

It is a perspective view of a seat in a seat structure provided with a side airbag device of an example of the present invention. It is a partial horizontal sectional view in the state where the airbag of the seat structure provided with the side airbag device of Example 1 of the present invention is not inflated and deployed. FIG. 3 is a partial horizontal cross-sectional view showing a state in which the door is pushed and opened by an airbag in the initial stage of inflation and deployment from the state of FIG. In addition, the deformation | transformation state of an airbag and a pad is abbreviate | omitted. It is a partial expanded sectional view which shows only the hook of a door in the seat structure provided with the side airbag apparatus of this invention Example 1, and its vicinity. In the seat structure provided with the side airbag device according to the first embodiment of the present invention, in the case where the loop is made of yarn, it is a partially enlarged perspective view of only the loop of the side skin and its vicinity viewed from the back side of the side skin. . It is the elements on larger scale which looked at only the loop of the side skin and its neighborhood from the back side of the side skin in the case where the loop is made of cloth in the seat structure provided with the side airbag device of Example 1 of the present invention. . It is the partial expansion perspective view which looked at the resin-made case and side skin in the sheet | seat structure provided with the side airbag apparatus of this invention Example 1 from the surface side of the side skin. It is the partial expansion perspective view which looked at the resin-made case and side skin in the sheet | seat structure provided with the side airbag apparatus of this invention Example 2 from the front side of the side skin. It is the partial expansion perspective view which looked at the resin-made case and side skin in the sheet | seat structure provided with the side airbag apparatus of this invention Example 3 from the front side of the side skin. It is the partial expansion perspective view which looked at the resin-made case and side skin in the sheet | seat structure provided with the side airbag apparatus of this invention Example 4 from the surface side of the side skin.

  Below, the sheet | seat structure (henceforth a seat structure only) provided with the side airbag apparatus of this invention Example is demonstrated with reference to FIGS. 1 to 7 show the sheet structure of Example 1 of the present invention, FIG. 8 shows the sheet structure of Example 2 of the present invention, FIG. 9 shows the sheet structure of Example 3 of the present invention, and FIG. These show the sheet | seat structure of this invention Example 4. FIG. Portions common to all the embodiments of the present invention are denoted by the same reference numerals throughout the embodiments of the present invention. In the figure, UP indicates the upper side, FR indicates the vehicle front side, and OUT indicates the vehicle width direction outer side.

First, the first embodiment of the present invention will be described.
[Example 1] (FIGS. 1 to 7)
As shown in FIG. 2, the seat structure of the first embodiment of the present invention is such that the airbag 30 is housed in a resin case 20 attached to the side frame 11 of the seat back 10 and the front side skin 12 is in a side collision or a side collision prediction. The seat structure includes a side airbag device 50 that breaks and deploys the sewing portion 14 between the side skin 13 and the side skin 13. Hereinafter, the resin case 20 is also simply referred to as a case, and the side airbag device 50 is also simply referred to as an airbag device.

  The seat back 10 is used as an occupant's back. As shown in FIG. 1, the seat back 10 is disposed at a rear end portion of a seat cushion 10 a on which an occupant sits. On the upper part of the seat back 10, a headrest 10b for supporting the passenger's head is disposed. The seat back 10 includes side supports 16 that are located on both sides in the width direction of the seat back 10 and bulge (raise) to the front as compared to the center portion 15 in the width direction of the seat back 10.

The side frame 11 of the seat back 10 constitutes a skeleton member of the seat back 10 and is disposed inside the seat back 10 as shown in FIG. A pad 17 such as urethane foam is disposed around the side frame 11.

The front side skin 12 of the seat back 10 is provided from the front end portion of the side support 16 to a boundary position 18 between the side support 16 and the width direction center portion 15 of the seat back 10, and is formed in the width direction center portion 15 of the seat back 10. The front main skin 19 and the sewing thread 18a are sewn. The front side skin 12 and the front main skin 19 are an integral part, and the sewing thread 18a may be omitted.

The side skin 13 of the seat back 10 is provided on the side surface of the side support 16 (side surface of the seat back 10). The front end portion of the side skin 13 reaches the front end portion of the side support 16, and is sewn by the front side skin 12 and the sewing thread 14a.

When the side skin 13 is made of a material that is relatively easy to stretch, such as knit, an unillustrated cloth (strength cloth or reinforcing cloth) that is less likely to stretch than the side skin 13 is formed on the side skin 13 on the back surface 13 a of the side skin 13. It may be provided along. When this cloth is provided, the side skin 13 is provided with this cloth.

  The airbag device 50 includes a case 20, an airbag 30, and an inflator 40.

  The case 20 is disposed in the side support 16 located on the outer side in the vehicle width direction (on the side door side of the vehicle). That is, the case 20 is disposed on the side support 16 located on the left side of the vehicle when the seat back 10 is a left seat, and the side support located on the right side of the vehicle when the seat back 10 is a right seat. 16 is disposed. The case 20 is disposed outside the side frame 11 in the vehicle width direction.

  The case 20 includes a base portion 21 that is fixed to the side frame 11 using bolts 23, and a door (which may be referred to as a lid portion) 22 that is pushed and opened outward in the vehicle width direction by an inflating airbag 30. Prepare.

  The base portion 21 is fixedly attached to the side frame 11 with a fixed wall portion 21a extending in the front-rear direction. The base portion 21 includes, in addition to the fixed wall portion 21a, a front side wall portion 21b extending outward from the front end portion of the fixed wall portion 21a in the vehicle width direction and a rear side wall extending outward from the rear end portion of the fixed wall portion 21a in the vehicle width direction. Part 21c. The front side wall part 21b and the rear side wall part 21c may extend linearly from the fixed wall part 21a, or may have at least one curved part or bent part. Further, although not shown, at least a part of the fixed wall portion 21a and / or the front side wall portion 21b may be pushed and opened by the inflating airbag 30.

  The door 22 is configured to rotate around a hinge portion 24 provided between the door 22 and the rear side wall portion 21c and open outward in the vehicle width direction. The hinge portion 24 is provided at the rear end portion (including the vicinity thereof) of the door 22. The hinge portion 24 may be formed separately from the base portion 21 and the door 22, but is desirably an integral hinge formed integrally with the base portion 21 and the door 22 in order to reduce the number of parts. When the hinge part 24 is an integral hinge, the opening angle of the door 22 may be regulated by setting the notch angle provided for the hinge part 24 to an acute angle or the like.

  The door 22 extends from the hinge portion 24 to the front side. The door 22 is provided at a position facing the back surface 13 a of the side skin 13. The door 22 may extend linearly on the front side, or may have at least one curved portion or bent portion. The front end portion of the door 22 is bent inward in the vehicle width direction and extends a predetermined amount inward in the vehicle width direction. The front end portion of the door 22 has a base portion in order to increase the protection force of the airbag device 50 by the case 20 when the door 22 is not opened by being pushed by the inflating airbag 30 (when the door 22 is closed). It is desirable that the front side wall portion 21b of 21 is wrapped in the front-rear direction and nail-fitted.

  The airbag 30 and the inflator 40 are accommodated in the case 20. The airbag 30 and the inflator 40 are fixedly attached to the side frame 11 together with the case 20 using bolts 23 that attach the case 20 to the side frame 11.

The inflator 40 ejects gas at the time of a side collision or a side collision prediction. The side collision prediction time is a time when a side collision that cannot be avoided is predicted. The airbag 30 is stored in the case 20 in a folded state. The airbag 30 is inflated by the gas ejected from the inflator 40.

  When the airbag 30 is inflated, as shown in FIG. 3, the door 22 is pushed by the airbag 30 to rotate outward in the vehicle width direction (in FIG. 3, the airbag 30 and the pad 17 are the airbag 30. Is shown in a state of not being inflated). By the movement of the door 22, the side skin 13 is pulled outward in the vehicle width direction and rearward of the vehicle. As a result, the sewing part 14 is broken, and the airbag 30 is deployed from the sewing part 14 between the side door of the vehicle and the passenger side.

In the present invention, a movement suppression mechanism (hereinafter also simply referred to as a suppression mechanism) 60 is provided. The suppression mechanism 60 is provided to suppress the relative movement (slip) between the door 22 and the side skin 13.

The suppression mechanism 60 includes a door side mechanism 70 provided on the door 22 and a skin side mechanism 80 provided on the side skin 13. The door-side mechanism 70 is provided at least at the vehicle front side end portion of the vehicle width direction outer side surface 22a of the door 22. The skin side mechanism 80 is provided on the back surface 13 a of the side skin 13. The skin side mechanism 80 is provided in the back surface 13a part which the door side mechanism 70 contacts when it is pushed by the airbag 30 and the door 22 opens.

The door side mechanism 70 and the skin side mechanism 80 can be engaged with each other or contacted with each other. The door-side mechanism 70 and the skin-side mechanism 80 may start to engage or come into contact with each other when the door 22 is pushed and opened by the airbag 30 and before the door 22 is pushed and opened by the airbag 30. They may be engaged or in contact with each other.
The above configuration is applied not only to the first embodiment of the present invention but also to other embodiments of the present invention.

  In the first embodiment of the present invention, the door side mechanism 70 is an engaging portion 71, and the engaging portion 71 is a hook 71 a provided on the door 22. The skin side mechanism 80 is an engagement receiving portion 81 to which the engagement portion 71 can be engaged, and the engagement receiving portion 81 is a loop 81 a provided on the back surface 13 a of the side skin 13.

  The hook 71a is made of resin, for example. The hook 71a is preferably formed integrally with the door 22 in order to reduce the number of parts. The hook 71a is provided so as to protrude from the vehicle width direction outer side surface 22a of the door 22 to the vehicle width direction outer side (side skin 13 side). In order to prevent the hook 71 a from being touched from the front side of the side skin 13 via the side skin 13, it is desirable that a part 17 a of the pad 17 is inserted between the hook 71 a and the side skin 13. As shown in FIG. 4, the angle θ formed by the rear side surface of the hook 71a and the outer side surface 22a of the door 22 in the vehicle width direction is an acute angle so that the hook 71a can be reliably engaged with the loop 81a. That is, the relationship 0 <θ <90 ° is satisfied.

  The loop 81a is formed using a thread, for example, as shown in FIG. Specifically, the loop 81a has a gap S between the middle portion of the yarn and the back surface 13a of the side skin 13 (a state in which the slack is given), and both ends of the yarn are side-sided by the sewing yarn 83a. It is formed by fixing to the epidermis 13. However, the loop 81a may be formed using cloth as shown in FIG. Specifically, the loop 81a is an edge that forms the gap S1 in a state where the gap S1 is provided between the front end portion of the cloth and the middle portion in the vertical direction and the back surface 13a of the side skin 13 (a state in which the slack is provided). It may be formed by fixing the entire edge portion excluding the portion to the side skin 13 with the sewing thread 83b.

  Only one hook 71a and one loop 81a may be provided, or a plurality of hooks 71a and loops 81a may be provided as shown in FIG. When only one hook 71a and one loop 81a are provided, the vertical length of the loop 81a is more than twice the vertical length of the hook 71a so that the hook 71a can be reliably engaged with the loop 81a. For example, it is desirable that the length of the hook 71a is set longer than the vertical length. When a plurality of hooks 71a and loops 81a are provided, in order to allow at least one of the hooks 71a to engage with at least one of the loops 81a, the plurality of hooks 71a are spaced apart from the door 22 in the vertical direction. It is desirable that a plurality of loops 81a be provided on the side skin 13 at intervals in the vertical direction and in a plurality of rows in the front-rear direction corresponding to the hooks 71a.

Here, the effect of the first embodiment of the present invention will be described.
(A) Since the suppression mechanism 60 that suppresses relative movement between the door 22 of the case 22 and the side skin 13 is provided, the airbag 30 that inflates compared to the case where the suppression mechanism 60 is not provided (conventional). It is possible to suppress relative movement (slip) between the door 22 and the side skin 13 when the door 22 is opened by being pushed. As a result, the deployment force of the door 22 by the airbag 30 is effectively transmitted to the side skin 13, and the side skin 13 can be effectively pulled outward and rearward in the vehicle width direction using the deployment force of the door 22. Therefore, the sewing part 14 of the front side skin 12 and the side skin 13 can be broken more quickly than in the prior art, and the airbag 30 can be deployed between the occupant and the passenger compartment side.
This effect (A) is applied not only to the first embodiment of the present invention but also to other embodiments of the present invention.

(B) The door 22 is configured to open around the hinge portion 24 provided at the rear end portion of the door 22, and the door side mechanism 70 of the suppression mechanism 60 is provided at least at the vehicle front side end portion of the door 22. Therefore, compared with the case where the door-side mechanism 70 is not provided at the vehicle front side end portion of the door 22, the movement amount of the door-side mechanism 70 when the airbag 30 is inflated increases, and the deployment force of the door 22 is reduced. By utilizing this, the side skin 13 can be effectively pulled outward and rearward in the vehicle width direction (the amount to be pulled can be increased).
This effect (B) is applied not only to the first embodiment of the present invention but also to other embodiments of the present invention.

(C) Since the door side mechanism 70 is the engaging portion 71 and the skin side mechanism 80 is the engaging receiving portion 81 to which the engaging portion 71 can be engaged, the engaging portion 71 and the engaging receiving portion 81 are provided. Engagement with each other can surely suppress relative movement between the door 22 and the side skin 13.
This effect (C) is applied not only to the first embodiment of the present invention but also to the second embodiment of the present invention.

(D) Since the engaging portion 71 is a hook 71a provided on the door 22 and the engagement receiving portion 81 is a loop 81a provided on the back surface 13a of the side skin 13, the hook 71a engages with the loop 81a. (To be caught), it is possible to suppress relative movement between the door 22 and the side skin 13. In this structure, it is only necessary to provide the hook 71a and the loop 81a with which the hook 71a is engaged.

(E) A plurality of hooks 71a are provided on the door 22 with an interval in the vertical direction, and a plurality of loops 81a are provided on the side skin 13 with an interval in the vertical direction corresponding to the hook 71a and in the front-rear direction. Since it is provided over a plurality of rows, the robustness in the engagement between the hook and the loop can be improved.

[Example 2] (FIG. 8)
In the second embodiment of the present invention, the door-side mechanism 70 is an engaging portion 71, and the engaging portion 71 is a first surface fastener 71b composed of one of a male side and a female side. The skin-side mechanism 80 is an engagement receiving portion 81 to which the engaging portion 71 can be engaged. The engagement receiving portion 81 is provided on the back surface 13a of the side skin 13 and includes the other of the male side and the female side. It is the 2nd surface fastener 81b.

  The first surface fastener 71b is fixed to the outer surface 22a of the door 22 in the vehicle width direction by bonding or the like. The second surface fastener 81b may be fixed to the back surface 13a of the side skin 13 by adhesion or the like, or may be fixed by sewing using a sewing thread (not shown).

In the embodiment 2 of the present invention, the following effects can be obtained.
(F) The engaging portion 71 is a first surface fastener 71b composed of one of the male side and the female side, and the engaging receiving portion 81 is composed of the other of the male side and the female side and is formed on the back surface 13a of the side skin 13. Since it is the 2nd surface fastener 81b provided, it can suppress that a relative movement generate | occur | produces between the door 22 and the side skin 13 using a surface fastener structure. In this structure, it is only necessary to provide the hook-and-loop fasteners 71b and 81b, and the structure is relatively simple, which is advantageous in terms of cost.

Example 3 (FIG. 9)
In the third embodiment of the present invention, the door-side mechanism 70 is a first friction coefficient increasing portion 72 that is brought into contact with the skin-side mechanism 80 with an increased friction coefficient, and the first friction coefficient increasing portion 72 is a first friction coefficient increasing portion 72. This is a rubber member 72a. Further, the skin side mechanism 80 is a second friction coefficient increasing portion 82 that comes into contact with the door side mechanism 70 with an increased friction coefficient, and the second friction coefficient increasing portion 82 is a second rubber member 82a. .

The configuration of the third embodiment of the present invention is as follows in the claims format.
“The first friction coefficient increasing portion is a first rubber member, and the second friction coefficient increasing portion is a second rubber member provided on the back surface of the side skin. Seat structure with side airbag device. "

  The thickness of the first rubber member 72a is relatively thin. The first rubber member 72a is fixed to the outer surface 22a in the vehicle width direction of the door 22 by adhesion or the like. The thickness of the second rubber member 82a is relatively thin. The second rubber member 82a may be fixed to the back surface 13a of the side skin 13 by adhesion or the like, or may be fixed by sewing using a sewing thread (not shown).

In the third embodiment of the present invention, the following effects can be obtained.
(G) The door-side mechanism 70 is a first friction coefficient increasing portion 72 that comes into contact with the skin-side mechanism 80 with an increased friction coefficient, and the skin-side mechanism 80 has an increased friction coefficient and the door-side mechanism 70. Since it is the 2nd friction coefficient increase part 82 which contacts, it can suppress reliably that a relative movement generate | occur | produces between the door 22 and the side skin 13 by the 1st, 2nd friction coefficient increase part 72,82.
This effect (G) is applied not only to the third embodiment of the present invention but also to the fourth embodiment of the present invention.

(H) Because the first friction coefficient increasing portion 72 is the first rubber member 72a and the second friction coefficient increasing portion 82 is the second rubber member 82a provided on the back surface 13a of the side skin 13. The occurrence of relative movement between the door 22 and the side skin 13 can be suppressed using rubber having a high frictional force. In this structure, it is only necessary to provide the rubber members 72a and 82a, and the structure is relatively simple, which is advantageous in terms of cost.

Example 4 (FIG. 10)
In the fourth embodiment of the present invention, the door-side mechanism 70 is a first friction coefficient increasing portion 72 that comes into contact with the skin-side mechanism 80 with an increased friction coefficient, and the first friction coefficient increasing portion 72 is a first friction coefficient increasing portion 72. This is a surface roughness increasing portion 72b. The skin-side mechanism 80 is a second friction coefficient increasing portion 82 that is brought into contact with the door-side mechanism 70 with an increased friction coefficient, and the second friction coefficient increasing portion 82 is a second surface roughness increasing portion. 82b.

  The first surface roughness increasing portion 72b is a portion in which the surface roughness of the door 22 is made larger than the surface roughness of the other door 22 portion (the door 22 portion other than the first surface roughness increasing portion 72b). It is. The second surface roughness increasing portion 82b compares the surface roughness of the back surface 13a of the side skin 13 with the surface roughness of the other back surface 13a portion (the back surface 13a portion other than the second surface roughness increasing portion 82b). It is a large part. In FIG. 10, the first and second surface roughness increasing portions 72b and 82b are indicated by hatching.

The configuration of the fourth embodiment of the present invention is as follows in the claims format.
“The first friction coefficient increasing portion is a first surface roughness increasing portion in which the surface roughness of the door is larger than the surface roughness of the other door portions, and the second frictional force increase The side airbag device according to claim 7, wherein the portion is a second surface roughness increasing portion in which the surface roughness of the back surface of the side skin is made larger than the surface roughness of the back surface portion of the other side skin. Seat structure with. "

In the fourth embodiment of the present invention, the following effects can be obtained.
(I) The 1st friction coefficient increase part 72 is the 1st surface roughness increase part 72b which made the surface roughness of the door 22 larger than the surface roughness of the other door 22 part, and is 2nd friction. Since the coefficient increasing portion 82 is the second surface roughness increasing portion 82b in which the surface roughness of the back surface 13a of the side skin 13 is larger than the surface roughness of the other back surface 13a portion, the door 22 and the side skin 13 It is possible to suppress relative movement between the door 22 and the side skin 13 by increasing the surface roughness. This structure is advantageous in terms of cost because it is only necessary to change the surface roughness of the door 22 and the back surface 13a of the side skin 13, without increasing the number of parts and further complicating the structure.

DESCRIPTION OF SYMBOLS 10 Seat back 11 Side frame 12 Front side skin 13 Side skin 13a Back side 14 of side skin Sewing part 15 Seat back width direction center part 16 Seat back side support 17 Pad 19 Front main skin 20 Resin case 21 Base part 22 Door 22a Outer surface 23 in the vehicle width direction of the door Bolt 24 Hinge portion 30 Air bag 40 Inflator 50 Side airbag device 60 Movement restraining mechanism 70 Door side mechanism 71 Engaging portion 71a Hook 71b First surface fastener 72 First friction coefficient increasing portion 72a First rubber member 72b First surface roughness increasing portion 80 Skin side mechanism 81 Engagement receiving portion 81a Loop 81b Second surface fastener 82 Second friction coefficient increasing portion 82a Second rubber member 82b Second Increased surface roughness

Claims (7)

Seat structure equipped with a side airbag device that is deployed in a resin case attached to the side frame of the seat back and breaks and deploys the sewn part between the front side skin and the side skin during a side collision or when a side collision is predicted In
The resin case includes a base portion fixed to the side frame, and a door that opens outward in the vehicle width direction by the inflating airbag.
The seat structure provided with the side airbag apparatus in which the movement suppression mechanism which suppresses the relative movement of the said door and the said side skin is provided. The door is configured to open around a hinge portion provided at a vehicle rear side end of the door,
The movement suppression mechanism includes a door-side mechanism provided on the door and a skin-side mechanism provided on the side skin, and the door-side mechanism is provided on at least a vehicle front side end portion of the door. A seat structure comprising the side airbag device according to claim 1.   The seat structure provided with the side airbag device according to claim 2, wherein the door side mechanism is an engagement portion, and the skin side mechanism is an engagement receiving portion to which the engagement portion can be engaged.   The seat structure provided with the side airbag device according to claim 3, wherein the engagement portion is a hook provided on the door, and the engagement receiving portion is a loop provided on a back surface of the side skin.   A plurality of hooks are provided in the door with a space in the vertical direction, and the loop has a plurality of rows in the vertical direction on the side skin corresponding to the hook, and a plurality of rows in the vehicle front-rear direction. The seat structure provided with the side airbag device according to claim 4 provided over.   The engaging portion is a first surface fastener made of one of a male side and a female side, and the engaging receiving portion is made of the other of the male side and the female side and is provided on the back surface of the side skin. The seat structure provided with the side airbag device according to claim 3 which is a hook and loop fastener.   The door-side mechanism is a first friction coefficient increasing portion that comes into contact with the skin-side mechanism with an increased friction coefficient, and the skin-side mechanism is a second member that comes into contact with the door-side mechanism with an increased friction coefficient. The seat structure provided with the side airbag device according to claim 2, which is a friction coefficient increasing portion.

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