JP2021066254A - Seat for vehicle - Google Patents

Abstract

To provide a seat for a vehicle with a simple structure capable of deploying an airbag from a desired position.SOLUTION: A seat for a vehicle (a seat S for a vehicle) includes: an airbag module 50 having an airbag 51 and an inflator and is fixed to a side frame; and a webbing 100 for regulating a deploying direction of the airbag 51. The webbing 100 is a raw material of a webbing formed by weaving first yarns and second yarns in that a first direction to which the first yarns are stretched is more hardly stretched than a direction to which the second yarns are stretched. The webbing 100 includes: a main body part 110 whose one end part is sewn to a breaking part 70A of a surface skin: a lower extending part 120 extending from the other end part of the main body part 110 to be fixed to a side frame; and an upper extending part 130 extending from a position higher than the lower extending part 120 among the other end part of the main body part 110 to be fixed to the side frame. The lower extending part 120 is extended in a direction intersecting with the first direction. The upper extending part 130 is extended along the first direction.SELECTED DRAWING: Figure 9

Description

The present invention relates to a vehicle seat comprising an airbag module with an airbag and an inflator.

Conventionally, as a vehicle seat, an airbag module in a folded state and an airbag module for introducing gas into the airbag to inflate and expand it, and an airbag module arranged in the seat back, and a seat. It is known that a pad that constitutes the outer shape of the back, a skin that covers the periphery of the pad, and a force cloth that regulates the deployment direction of the airbag are provided (Patent Document 1).

JP-A-2018-103810

By the way, it is desired that the vehicle seat provided with the airbag module has a configuration in which the airbag can be deployed from a desired position. And it is desirable that such a configuration is a simple configuration.

Therefore, an object of the present invention is to provide a vehicle seat capable of deploying an airbag from a desired position with a simple configuration.
In addition, the purpose is to regulate the deployment direction of the airbag in a well-balanced manner with a force cloth.
Another object is to increase the strength of the extension portion of the force cloth.
It also aims to improve the stability of the airbag when it is deployed.
The purpose is to deploy the left and right airbags in appropriate directions.
Another object is to deploy the first airbag upward.
Another object is to deploy the second airbag downward.

The vehicle seats for achieving the above-mentioned objectives include a seat frame having a first side frame and a second side frame arranged apart from each other on the left and right, and gas in the first airbag and the first airbag. A first airbag module having a first inflator to be supplied and fixed to the first side frame, a pad covering the seat frame, and a skin covering the seat frame and the pad, the first air. A skin having a first breaking portion that breaks when the bag is unfolded, and a first force cloth that regulates the deployment direction of the first airbag are provided, and the first force cloth is a first thread and a second force cloth. It is a first force cloth raw fabric made by weaving threads, and is composed of a first force cloth raw fabric in which the first direction in which the first thread extends is less stretchable than the second direction in which the second thread extends. A first main body portion to which one end portion is sewn to the first broken portion, a first lower extending portion extending from the other end portion of the first main body portion and fixed to the first side frame, and the first one. The other end of the main body has a first upper extending portion extending from a position above the first lower extending portion and fixed to the first side frame, and the first lower extending portion. The protruding portion extends in a direction intersecting the first direction, and the first upper extending portion extends along the first direction.

According to such a configuration, when the first airbag is deployed, the stress due to the expansion of the first airbag is applied to the first upper extending portion of the first breaking portion along the direction in which the first upper extending portion extends. It can be transmitted first to the part located on the extension line of. As a result, the portion of the first fractured portion located on the extension line of the first upper extending portion can be first fractured, so that the first airbag can be deployed from this portion and the first airbag can be deployed. It can be deployed upward where the seated person's head or the like is located. That is, according to the above configuration, the airbag can be deployed from a desired position with a simple configuration.

In the vehicle seat described above, the first side frame to which the first airbag module is fixed may be arranged on the left and right inside of the vehicle body.

According to this, the first airbag can be deployed upward on the left and right inside of the vehicle body.

In the vehicle seat described above, the first side frame has a lower side frame and an upper side frame joined to the upper part of the lower side frame, and a joint portion between the lower side frame and the upper side frame. Includes a first joint and a second joint located above the first joint, the first airbag module is the second joint from a position below the first joint. It can be configured to be arranged up to a position above the portion.

According to this, the upper and lower sizes of the first airbag can be secured and the first airbag can be arranged at a position close to the head of the seated person. Therefore, when the first airbag is deployed, the first airbag Can be more easily deployed upwards.

In the vehicle seat described above, the first airbag module is arranged outside the first side frame in the left-right direction of the vehicle seat and is covered with the skin without the pad. can do.

According to this, the left and right sizes of the first airbag module can be secured as compared with the configuration in which the first airbag module is covered with the skin via the pad in the left-right direction. As a result, the size of the first airbag can be secured, so that the first airbag can be easily deployed upward when the first airbag is deployed.

In the vehicle seat described above, the first inflator has a gas ejection port, and the ejection port is located at a position where the first upper extending portion of the first side frame is fixed in the vertical direction. The first lower extending portion of the first side frame may be arranged between the fixed position and the first lower extending portion.

According to this, gas is supplied from between the two positions of the first force cloth fixed to the first side frame to inflate the first airbag, so that the first force cloth causes the first airbag. The deployment direction can be regulated in a well-balanced manner.

In the vehicle seat described above, the first force cloth has a folded and overlapped overlapping portion including the first upper extending portion, and the overlapping portion is sewn by sewing in a Z shape with a thread. Can be configured as

According to this, the strength of the first upper extending portion can be increased.

In the vehicle seat described above, the first upper extending portion may be configured to be folded back in the first direction.

According to this, when the first airbag is deployed, the stress due to the expansion of the first airbag can be satisfactorily transmitted along the direction in which the first upper extension portion extends, so that the airbag can be satisfactorily transmitted from a desired position. It can be made easier to deploy.

In the vehicle seat described above, the first side frame has a bead portion that is convex in one direction in the left-right direction, and the bead portion includes a first bead portion that extends vertically and the first bead portion to the first bead portion. The first airbag module has two second bead portions extending in a direction different from the one bead portion, and the first airbag module is fixed between the two second bead portions and fixed to the first side frame. Can be configured to have at least one.

According to this, since the first airbag module can be fixed to the highly rigid portion of the side frame, the stability when the first airbag is deployed can be improved.

The vehicle seat described above includes a second airbag and a second airbag module that supplies gas into the second airbag, and is fixed to the second side frame, and the second air. A second force cloth that regulates the deployment direction of the bag is provided, the skin has a second break portion that breaks when the second airbag is deployed, and the second force cloth has the second break portion. One end of the bag is sewn to the bag, and the shape of the first cloth is different from that of the first cloth.

According to this, the deployment direction of the first airbag and the deployment direction of the second airbag can be changed. As a result, the left and right airbags can be deployed in appropriate directions.

In the vehicle sheet described above, the second force cloth is a second force cloth raw fabric obtained by weaving a third thread and a fourth thread, and the third direction in which the third thread extends is the third direction. It consists of a second force cloth raw fabric that is harder to stretch than the fourth direction in which the thread of 4 extends, and extends from the second main body portion at which one end is sewn to the second broken portion and the other end portion of the second main body portion. The second upper extending portion fixed to the second side frame and the other end of the second main body portion extending from a position lower than the second upper extending portion to the second side frame. It has a second lower extension portion to be fixed, the second upper extension portion extends in a direction intersecting the third direction, and the second lower extension portion is the third. It can be configured to extend along the direction.

According to this, when the second airbag is deployed, the stress due to the expansion of the second airbag is applied to the second lower extending portion of the second breaking portion along the direction in which the second lower extending portion extends. It can be transmitted first to the part located on the extension line. As a result, the portion of the second fracture portion located on the extension line of the second lower extension portion can be first fractured, so that the second airbag can be deployed from this portion, and the second airbag can be deployed. Can be deployed downward where the seated person's waist and the like are located.

According to the present invention, the airbag can be deployed from a desired position with a simple configuration. In addition, the first airbag can be deployed upward.

Further, by arranging the first side frame to which the first airbag module is fixed on the left and right inside of the vehicle body, the first airbag can be deployed upward on the left and right inside of the vehicle body.

Further, by arranging the first airbag module from a position below the first joint to a position above the second joint, it is possible to facilitate the deployment of the first airbag upward.

Further, since the first airbag module is covered with the skin in the left-right direction without using the pad, the first airbag can be easily deployed upward.

Further, by arranging the spout of the first inflator between the positions fixed to the first side frame of the upper and lower extension portions of the first force cloth, the deployment direction of the first airbag by the first force cloth. Can be regulated in a well-balanced manner.

Further, the first force cloth has a folded and overlapped overlapping portion including the first upper extending portion, and the overlapping portion is sewn in a Z shape with a thread to sew the first upper extending portion. The strength of the part can be increased.

Further, the first upper extending portion is folded back in the first direction of the first force cloth raw fabric, so that the airbag can be more easily deployed from a desired position.

In addition, the stability of the first airbag when it is deployed is improved by having a fixing portion where the first airbag module is fixed to the first side frame between the two second bead portions of the first side frame. Can be made to.

Further, by having the second cloth having a shape different from that of the first cloth, the left and right airbags can be deployed in appropriate directions.

Further, the second upper extending portion of the second force cloth extends in a direction intersecting the third direction of the second force cloth original fabric, and the second lower extending portion extends along the third direction. 2 The airbag can be deployed downward.

It is a perspective view which shows the vehicle seat which concerns on embodiment. It is sectional drawing of the left side part of a seat back. It is sectional drawing of the right side part of a seat back. It is a perspective view which shows a part of a side frame and an inflator. It is a side view explaining the positional relationship between the fixed position of the 1st airbag module with respect to the side frame, the ejection port of the 1st inflator, and the fixed position of the 1st force cloth with respect to the side frame. It is the figure which looked at the seat back skin from the rear side with the back covering part turned up. It is a development view of the 1st force cloth. It is a development view of the 2nd cloth. It is a figure explaining the action of the 1st force cloth. It is a figure explaining the action of the 2nd force cloth.

Next, one embodiment of the invention will be described in detail with reference to the drawings as appropriate.
As shown in FIG. 1, the vehicle seat according to the present embodiment is configured as a vehicle seat S mounted on an automobile, and has a seat cushion S1, a seat back S2, and a headrest S3. ..

Here, in the present specification, front-rear, left-right, and up-down are based on front-back, left-right, and up-down as seen from a person sitting on a vehicle seat (seat person). Unless otherwise specified, the inside and outside in the left-right direction are based on the vehicle body, not the vehicle seat itself. That is, the side closer to the left and right center of the vehicle body is the left and right inside, and the side far from the left and right center of the vehicle body is the left and right outside.

Doors (not shown) for getting on and off the vehicle are arranged on the left and right outside of the vehicle seat S, and other vehicle seats (not shown) are arranged on the left and right inside of the vehicle seat S. The vehicle seat S and other vehicle seats have, for example, a driver's seat and a passenger seat. The other vehicle seats have a structure that is substantially symmetrical with the vehicle seat S.

The vehicle seat S includes a seat frame F, a pad PD that covers the seat frame F, and a skin SK that covers the seat frame F and the pad PD. The pad PD is made of urethane foam or the like, and the skin SK is made of cloth or leather.

The seat frame F includes a seat cushion frame and a seat back frame F2 (not shown), the pad PD includes the seat cushion pad PD1 and the seat back pad PD2 (see FIG. 2), and the skin SK includes the seat cushion skin SK1 and the seat back. Includes epidermis SK2. The seat cushion S1 is configured by covering the seat cushion frame with the seat cushion pad PD1 and the seat cushion skin SK1, and the seat back S2 covers the seat back frame F2 with the seat back pad PD2 and the seat back skin SK2. It is configured.

The seat back frame F2 includes left and right side frames 10, an upper frame 22 that connects the upper ends of the left and right side frames 10, a lower frame 30 that connects the lower ends of the left and right side frames 10, and a bridge frame 40. Have.

The left and right side frames 10 are arranged so as to be separated from each other on the left and right. The left side frame 10 as the first side frame is arranged on the left and right inside of the vehicle body, and the right side frame 10 as the second side frame is arranged on the left and right outside of the vehicle body. The first airbag module 50, which will be described later, is fixed to the left side frame 10, and the second airbag module 60 is fixed to the right side frame 10. The left and right side frames 10 have a substantially symmetrical structure.

Each side frame 10 has a lower side frame 11 and an upper side frame 21.
The lower side frame 11 is made of sheet metal and extends substantially vertically.

The upper side frame 21 is a part of a pipe frame 20 made of a metal pipe. The pipe frame 20 has a substantially U-shape, and comprises left and right upper side frames 21 extending substantially vertically and upper frames 22 extending left and right so as to connect the upper ends of the left and right upper side frames 21. There is. The lower part of each upper side frame 21 is joined to the upper part of the corresponding lower side frame 11 on the left and right by welding. The welded joint between the lower side frame 11 and the upper side frame 21 includes a first joint W1 and a second joint W2 located above the first joint W1.

A pair of brackets 23 are fixed to the upper frame 22 in a state of being separated from each other to the left and right. Pillars (reference numerals omitted) of the headrest S3 are attached to the bracket 23.
The lower frame 30 and the crosslinked frame 40 are each made of sheet metal. The lower frame 30 connects the lower portions of the left and right side frames 10, and the crosslinked frame 40 is arranged below the upper frame 22 and connects the upper portions of the left and right side frames 10.

As shown in FIGS. 2 and 3, the vehicle seat S further includes a first airbag module 50, a first force cloth 100, a second airbag module 60, and a second force cloth 200. ..
The seat back S2 has a seat back central portion S21 and a pair of left and right seat back side portions S22 provided on both left and right sides of the seat back central portion S21 and projecting to the front side of the seat back central portion S21. The first airbag module 50 and the first force cloth 100 are arranged on the left seat back side portion S22, and the second airbag module 60 and the second force cloth 200 are arranged on the right seat back side portion S22. There is.

As shown in FIG. 2, the first airbag module 50 includes a first airbag 51, a first inflator 52 that supplies gas into the first airbag 51, and a first retainer 53 that holds the first inflator 52. And a first case 54 for accommodating them.
The first airbag 51 is housed in the first case 54 in a folded state.

The first inflator 52 has a plurality of gas outlets 52A (see FIG. 4) at the lower end of a substantially cylindrical body, and is arranged in the first airbag 51. The first airbag 51 is configured to be expanded by the gas ejected from the ejection port 52A of the first inflator 52 and to be deployed in front of the left seat back side portion S22 (on the left and right inside of the seated person). The seat back skin SK2 has a vertically long first broken portion 70A that breaks when the first airbag 51 is deployed. The first inflator 52 has two protruding bolts 52B (see also FIG. 4), which are fixed to the first retainer 53 and the side frame 10. The first airbag module 50 is fixed to the left side frame 10 by the bolt 52B of the first inflator 52.

The first case 54 is made of resin. Long vertical slits (reference numerals omitted) are formed in the vicinity of the left and right inside of the front portion of the first case 54. When the first airbag 51 is deployed, the first airbag 51 expands the slit and comes out of the first case 54.

Here, a configuration for fixing the first airbag module 50 will be described.
As shown in FIG. 4, the side frame 10 (lower side frame 11) has a bead portion 12, a force cloth fixing hole 13, and a module fixing hole 14.

The bead portion 12 is formed in a substantially F-shape that is convex in the left-right direction, specifically, inward in the left-right direction of the vehicle seat S itself. Specifically, the bead portion 12 has a direction different from that of the first bead portion 12A extending substantially vertically at the rear end portion of the lower side frame 11 and the first bead portion 12A to the first bead portion 12A, specifically, substantially It has two second bead portions 12B extending forward. The upper second bead portion 12B extends substantially forward from the vicinity of the center in the vertical direction of the first bead portion 12A, and the lower second bead portion 12B extends substantially forward from the lower end of the first bead portion 12A. It extends so as to approach the upper second bead portion 12B.

The force cloth fixing hole 13 includes a first fixing hole 13A and a second fixing hole 13B. The first fixing hole 13A is arranged above the upper second bead portion 12B, and the second fixing hole 13B is arranged below the lower second bead portion 12B. As a result, the first fixing hole 13A and the second fixing hole 13B are arranged so as to sandwich the two second bead portions 12B in the vertical direction.

The module fixing hole 14 includes a third fixing hole 14A and a fourth fixing hole 14B. The third fixing hole 14A is arranged above the upper second bead portion 12B and between the first fixing hole 13A and the first bead portion 12A in the front-rear direction. The fourth fixing hole 14B is arranged between the two second bead portions 12B in the vertical direction.

In the first airbag module 50, the two bolts 52B of the first inflator 52 are passed through the third fixing hole 14A and the fourth fixing hole 14B formed in the side frame 10 from the left side, respectively, and the nut 55 (see FIG. 2). ), It is fixed to the side frame 10. With such a configuration, as shown in FIG. 5, the first airbag module 50 (inflator 52) has one fixing portion fixed to the side frame 10 between the two second bead portions 12B. (See lower bolt 52B). The first airbag module 50 fixed to the side frame 10 is arranged outside the side frame 10 (outside the vehicle seat S itself in the left-right direction) in the left-right direction of the vehicle seat S (see also FIG. 1). ).

As described above, since the left and right side frames 10 have a substantially symmetrical configuration, the left and right sides are reversed in terms of fixing and arrangement of the second airbag module 60, but the first airbag module It is almost the same as 50.

As shown in FIG. 2, the first force cloth 100 is a member that regulates the deployment direction of the first airbag 51. The front end portion of the first force cloth 100 is sewn to the first fracture portion 70A of the seat back skin SK2, and is arranged so as to pass through the front side and the left and right outside of the first airbag module 50. A clip 90 is attached to the rear end portion of the first force cloth 100, and the first force cloth 100 is fixed to the side frame 10 by inserting the clip 90 into the force cloth fixing hole 13 of the side frame 10. There is. The detailed configuration of the first force cloth 100 will be described later.

As shown in FIG. 3, the second airbag module 60 includes a second airbag 61, a second inflator 62 that supplies gas into the second airbag 61, and a second retainer 63 that holds the second inflator 62. And a second case 64 for accommodating them.
The second airbag 61 is housed in the second case 64 in a folded state.

The second inflator 62 has the same configuration as the first inflator 52 of the first airbag module 50. The second airbag 61 is configured to be expanded by the gas ejected from the ejection port of the second inflator 62 and to be deployed in front of the right seat back side portion S22 (left and right outside of the seated person). The seat back skin SK2 has a vertically long second broken portion 70B that breaks when the second airbag 61 is deployed. The second inflator 62 is fixed to the second retainer 63 and the side frame 10 by bolts 62B. Specifically, the second inflator 62 is fixed to the side frame 10 by passing the bolt 52B through a fixing hole (not shown) formed in the side frame 10 and fastening it to the nut 65. The second airbag module 60 is fixed to the right side frame 10 by the bolt 62B of the second inflator 62.

The second case 64 is made of resin. Long slits (reference numerals omitted) are formed vertically on the left and right outer sides of the front portion of the second case 64. When the second airbag 61 is deployed, the second airbag 61 expands the slit and comes out of the second case 64.

As shown in FIG. 1, the vertical size of the first airbag module 50 is larger than the vertical size of the second airbag module 60. Therefore, the first airbag module 50 is arranged from a position below the first joint portion W1 to a position above the second joint portion W2. On the other hand, the second airbag module 60 is arranged from a position below the first joint W1 to a position above the first joint W1, but its upper end is above the second joint W2. Is also located below. The upper end of the first airbag module 50 is located above the upper end of the second airbag module 60, and the lower end of the first airbag module 50 is located below the lower end of the second airbag module 60. There is.

Further, the left and right sizes of the first airbag module 50 are larger than the left and right sizes of the second airbag module 60. Therefore, as shown in FIG. 3, in the second airbag module 60, the outer surface 60A, which is the outer surface of the vehicle seat S itself in the left-right direction, is covered with a part of the seat back pad PD2. As a result, the second airbag module 60 is covered with the seat back skin SK2 via a part of the seat back pad PD2 in the left-right direction. The outer side surface 60A is not in contact with the seat back skin SK2 in the left-right direction. On the other hand, as shown in FIG. 2, in the first airbag module 50, the outer surface 50A, which is the outer surface of the vehicle seat S itself in the left-right direction, is not covered by the seat back pad PD2. The first airbag module 50 is directly covered by the seat back skin SK2 in the left-right direction without passing through the seat back pad PD2. The outer side surface 50A is in contact with the seat back skin SK2 in the left-right direction.

As shown in FIG. 3, the second force cloth 200 is a member that regulates the deployment direction of the second airbag 61. The front end portion of the second force cloth 200 is sewn to the second fractured portion 70B of the seat back skin SK2, and is arranged so as to pass through the front side and the left and right inside of the second airbag module 60. A clip 90 similar to the first force cloth 100 is attached to the rear end portion of the second force cloth 200, and the clip 90 is inserted into the force cloth fixing hole 13 of the side frame 10 in the second force cloth 200. , Fixed to the side frame 10.

As shown in FIG. 6, the seat back skin SK2 includes a front covering portion 71 that covers the front side of the seat back frame F2 and the seat back pad PD2, a back covering portion 72 that covers the rear side, and an upper covering portion 73 that covers the upper side. It has a left covering portion 74 that covers the left side and a right covering portion 75 that covers the right side. The seat back skin SK2 of FIG. 6 shows a state in which the back covering portion 72 is turned up and the back surface of the front covering portion 71 is viewed from the rear side. The seat back skin SK2 closes the line fasteners provided at the left end of the back covering 72 and the rear end of the left covering 74, and is provided at the right end of the back covering 72 and the rear end of the right covering 75. By closing the line fastener, it becomes a bag shape and covers the seat back frame F2 and the seat back pad PD2.

The first fractured portion 70A (see FIG. 2) is formed near the boundary between the front covering portion 71 and the left covering portion 74, and the second fractured portion 70B (see FIG. 3) is formed of the front covering portion 71 and the right covering portion 75. It is formed near the boundary. The upper covering portion 73 is formed with a pair of left and right insertion holes 73A for exposing the upper ends of the left and right brackets 23 to which the pillars of the headrest S3 are attached.

The first force cloth 100 and the second force cloth 200 have different shapes from each other. Hereinafter, the detailed configurations of the first force cloth 100 and the second force cloth 200 will be described.
The second force cloth 200 has a second main body portion 210, a second lower extending portion 220, and a second upper extending portion 230.
The second main body portion 210 has a vertically long shape, and the front end portion, which is one end portion, is sewn to the second fractured portion 70B (see FIG. 3) of the seat back skin SK2.

The second lower extending portion 220 and the second upper extending portion 230 are portions fixed to the side frame 10 and extend substantially rearward from the rear end portion which is the other end of the second main body portion 210. ing. Specifically, the second upper extending portion 230 extends from the vicinity of the center in the vertical direction of the rear end portion of the second main body portion 210. The second lower extending portion 220 is located below the second upper extending portion 230 of the rear end portion of the second main body portion 210, specifically, the lower end of the rear end portion of the second main body portion 210. Extends from. Clips 90 are attached to the tips of the second lower extension 220 and the second upper extension 230, respectively.

As shown in the unfolded state in FIG. 8, the second force cloth 200 is composed of a second force cloth raw fabric obtained by weaving a third thread and a fourth thread orthogonal to the third thread. The second force cloth raw fabric has a property that the third direction in which the third thread extends is less likely to stretch than the fourth direction in which the fourth thread extends. Furthermore, the second force cloth raw fabric is the most difficult to stretch in the third direction.

The second upper extending portion 230 extends from the second main body portion 210 in a direction intersecting the third direction. That is, the second upper extending portion 230 extends so as to form a predetermined angle with respect to the third direction. On the other hand, the second lower extending portion 220 extends from the second main body portion 210 along the third direction substantially parallel to the third direction. The second force cloth raw fabric (second force cloth 200) is provided with a plurality of seams 240 along the third direction indicating the third direction at intervals in the fourth direction. The threads forming the seam 240 have a different color than the third and fourth threads.

Returning to FIG. 6, the first force cloth 100 has a first main body portion 110, a first lower extending portion 120, and a first upper extending portion 130.
The first main body portion 110 has a vertically long shape, and the front end portion, which is one end portion, is sewn to the first fractured portion 70A (see FIG. 2) of the seat back skin SK2.

The first lower extending portion 120 and the first upper extending portion 130 are portions fixed to the side frame 10 and extend substantially rearward from the rear end portion which is the other end of the first main body portion 110. ing. Specifically, the first lower extending portion 120 extends from the lower end of the other end of the first main body 110. The first upper extending portion 130 is located above the first lower extending portion 120 of the rear end portion of the first main body portion 110, specifically, near the center of the first main body portion 110 in the vertical direction. Extends from. Clips 90 are attached to the tips of the first lower extending portion 120 and the first upper extending portion 130, respectively.

As shown in the unfolded state in FIG. 7, the first force cloth 100 is composed of a first force cloth raw fabric obtained by weaving a first thread and a second thread orthogonal to the first thread. The first force cloth raw fabric has a property that the first direction in which the first thread extends is less likely to stretch than the second direction in which the second thread extends. Furthermore, the first force cloth raw fabric is the most difficult to stretch in the first direction.

The first lower extending portion 120 extends from the first main body portion 110 in a direction intersecting the first direction. That is, the first lower extending portion 120 extends so as to form a predetermined angle with respect to the first direction. On the other hand, the first upper extending portion 130 extends from the first main body portion 110 along the first direction substantially parallel to the first direction. The first force cloth raw fabric (first force cloth 100) is provided with a plurality of seams 140 along the first direction indicating the first direction at intervals in the second direction. The threads forming the seam 140 have a different color than the first and second threads.

As shown in FIG. 6, the first force cloth 100 has a first lower side superimposing portion 151 and a first upper superimposing portion 152 as a superimposing part, and the second force cloth 200 has a second lower side superimposing portion 152. It has a portion 251 and a second upper superimposing portion 252.

As shown in FIGS. 6 and 7, the first lower overlapping portion 151 is a folded and overlapped portion of the first force cloth 100 including the first lower extending portion 120, and is shown by a virtual line. The folded lines 101 and 102 are formed by folding back the folded lines 101 and 102 toward the back side of the paper surface in FIG. 7 in this order. Further, the first upper overlapping portion 152 is a folded and overlapped portion of the first force cloth 100 including the first upper extending portion 130, and the folded lines 103 and 104 shown by virtual lines are arranged in this order. , It is formed by folding back to the back side of the paper surface of FIG.

Further, as shown in FIGS. 6 and 8, the second lower overlapping portion 251 is a folded and overlapped portion of the second force cloth 200 including the second lower extending portion 220, and is a virtual line. The folding lines 201 and 202 shown in FIG. 8 are formed by folding back in this order toward the back side of the paper surface of FIG. Further, the second upper overlapping portion 252 is a folded and overlapped portion of the second force cloth 200 including the second upper extending portion 230, and the folded lines 203 and 204 shown by virtual lines are arranged in this order. , It is formed by folding back to the back side of the paper surface of FIG.

As shown in FIG. 6, the first lower superimposing portion 151, the first upper superimposing portion 152, the second lower superimposing portion 251 and the second upper superimposing portion 252 are sewn in a Z shape with threads 160 and 260. Has been done.

The folded portion of the first upper overlapping portion 152 is folded in the first direction. Therefore, all the overlapping portions constituting the first upper superimposing portion 152 including the first upper extending portion 130 extend substantially parallel to the first direction along the first direction. Similarly, the folded portion of the second lower overlapping portion 251 is folded in the third direction. Therefore, all the overlapping portions constituting the second lower superimposing portion 251 including the second lower extending portion 220 extend substantially parallel to the third direction along the third direction.

In the first force cloth 100, the front end portion of the first main body portion 110 is folded back to the back side of the paper surface of FIG. 7 at the fold line 105 shown by the virtual line in FIG. 7, and the first fracture portion of the seat back skin SK2 is formed. It is sewn to 70A. Then, in the first force cloth 100, the clip 90 attached to the tip end portion of the first upper extension portion 130 is inserted into the first fixing hole 13A (see FIG. 5) of the left side frame 10, and the first lower side is The clip 90 attached to the tip of the extending portion 120 is inserted into the second fixing hole 13B of the left side frame 10 to be fixed to the left side frame 10.

Further, the second force cloth 200 is the second seat back skin SK2 in a state where the front end portion of the second main body portion 210 is folded back to the back side of the paper surface of FIG. 8 at the fold line 205 shown by the virtual line in FIG. It is sewn to the broken portion 70B. Then, in the second force cloth 200, similarly to the first force cloth 100, the clip 90 attached to the tip end portion of the second upper extension portion 230 is inserted into the first fixing hole 13A of the right side frame 10. The clip 90 attached to the tip of the second lower extending portion 220 is inserted into the second fixing hole 13B of the right side frame 10 to be fixed to the right side frame 10.

As shown in FIG. 5, with the first airbag module 50 fixed to the side frame 10, the plurality of outlets 52A provided at the lower end of the first inflator 52 are vertically connected to the side frame 10. It is arranged between the position where the first upper extending portion 130 is fixed and the position where the first lower extending portion 120 of the side frame 10 is fixed. That is, the ejection port 52A is located between the first fixing hole 13A to which the first upper extending portion 130 is fixed and the second fixing hole 13B to which the first lower extending portion 120 is fixed in the vertical direction. Have been placed. Although not shown, the arrangement of such spouts is the same for the second inflator 62 of the second airbag module 60.

Next, the action and effect of the vehicle seat S according to the present embodiment will be described.
As shown in FIG. 7, the first force cloth raw fabric constituting the first force cloth 100 is the most difficult to stretch in the first direction, and the first lower extending portion 120 intersects the first direction. Extending in the direction, the first upper extending portion 130 extends along the first direction. Therefore, as shown in FIG. 9, when the first airbag 51 is deployed, the first force cloth 100 applies the stress due to the expansion of the first airbag 51 along the first direction in which the first upper extension portion 130 extends. Therefore, it can be first transmitted to the portion located on the extension line of the first upper extending portion 130 of the first breaking portion 70A. As a result, the portion of the first fracture portion 70A located on the extension line of the first upper extension portion 130 can be first fractured, so that the first airbag 51 can be deployed from this portion, and the first The airbag 51 can be deployed upward where the head of the seated person P or the like is located.

On the other hand, as shown in FIG. 8, the second force cloth raw fabric constituting the second force cloth 200 is most difficult to extend in the third direction, and the second upper extending portion 230 is in the third direction. It extends in the intersecting direction and the second lower extension 220 extends along the third direction, so that the second airbag 61 expands when the second airbag 61 is deployed, as shown in FIG. The stress due to the above can be first transmitted to the portion of the second breaking portion 70B located on the extension line of the second lower extending portion 220 along the direction in which the second lower extending portion 220 extends. As a result, the portion of the second fractured portion 70B located on the extension line of the second lower extending portion 220 can be first fractured, so that the second airbag 61 can be deployed from this portion. 2 The airbag 61 can be deployed downward where the waist of the seated person P is located. The head of the seated person P can be protected by, for example, a curtain airbag 69 on the left and right outer sides of the vehicle body.

According to the present embodiment described above, the airbags 51 and 61 are positioned at desired positions with a relatively simple configuration in which the extension portions 130 and 220 are provided so as to extend along the direction in which the force cloth original fabric is difficult to stretch. Can be expanded from.

Further, since the left side frame 10 to which the first airbag module 50 is fixed is arranged on the left and right inside of the vehicle body, the head of the seated person P and the like are located on the left and right inside of the vehicle body. It can be deployed upwards. Thereby, the head of the seated person P can be protected.

Further, since the first airbag module 50 is arranged from a position below the first joint portion W1 to a position above the second joint portion W2, the upper and lower sizes of the first airbag 51 are secured. The first airbag 51 can be arranged at a position close to the head of the seated person P. This makes it easier to deploy the first airbag 51 upward when the first airbag 51 is deployed.

Further, since the first airbag module 50 is directly covered by the seat back skin SK2 in the left-right direction without passing through the seat back pad PD2, the first airbag module 50 is like the second airbag module 60. The left and right sizes of the first airbag module 50 can be secured as compared with the configuration covered by the seat back skin SK2 via the seat back pad PD2. As a result, the size of the first airbag 51 can be secured, so that the first airbag 51 can be easily deployed upward when the first airbag 51 is deployed.

Further, since the spouts 52A of the inflators 52 and 62 are arranged between the two force cloth fixing holes 13 of the side frame 10 in the vertical direction, they are fixed to the side frame 10 of the force cloths 100 and 200. Gas is supplied from between the two positions to inflate the airbags 51 and 61. As a result, the deployment directions of the airbags 51 and 61 can be regulated in a well-balanced manner by the force cloths 100 and 200.

Further, since the force cloths 100 and 200 have the sewn overlapping portions 151, 152, 251, 252 including the extending portions 120, 130, 220 and 230, the strength of the extending portions 120, 130, 220 and 230 Can be raised. Further, since the overlapping portions 151, 152, 251, 252 are sewn by sewing the threads 160, 260 in a Z shape, each of the overlapping portions 151, 152, 251, 252 can be sewn at once.

Further, since the folded portion of the first upper overlapping portion 152 of the first force cloth 100 is folded back in the first direction, the stress due to the expansion of the first airbag 51 is applied when the first airbag 51 is deployed. 1 The upper extending portion 130 can be satisfactorily transmitted along the extending direction, and the first airbag 51 can be more easily deployed from a desired position. Similarly, since the folded portion of the second upper overlapping portion 252 of the second force cloth 200 is folded back in the third direction, the stress due to the expansion of the second airbag 61 is applied when the second airbag 61 is deployed. The second lower extending portion 220 can be satisfactorily transmitted along the extending direction, and the second airbag 61 can be more easily deployed from a desired position.

Further, since the airbag modules 50 and 60 have one fixing portion between the two second bead portions 12B of the side frame 10, the airbag modules 50 and 60 are fixed to the highly rigid portion of the side frame 10. Can be done. Thereby, the stability when the airbags 51 and 61 are deployed can be improved.

Further, since the first force cloth 100 and the second force cloth 200 have different shapes, the deployment direction of the first airbag 51 and the deployment direction of the second airbag 61 can be changed. As a result, the left and right airbags 51 and 61 can be deployed in appropriate directions, respectively.

Although one embodiment of the invention has been described above, the present invention is not limited to the above-described embodiment, and can be appropriately modified and implemented.
For example, in the above-described embodiment, the first airbag module 50 has only one fixing portion fixed to the side frame 10 between the two second bead portions 12B of the side frame 10. It may have two or more such fixing points.

Further, in the above-described embodiment, the first airbag module 50 was directly covered by the seat back skin SK2 in the left-right direction, but similarly to the second airbag module 60, the seat back skin SK2 via the seat back pad PD2. May be covered by.

Further, in the above-described embodiment, the airbag modules 50 and 60 have cases 54 and 64 made of resin, but the configuration may not include such cases.

Further, in the above-described embodiment, the second force cloth 200 has a shape different from that of the first force cloth 100, but the second force cloth has substantially the same shape symmetrical to the first force cloth. May be good. Further, the vehicle seat S may be configured not to include the second airbag module 60 and the second force cloth 200.

Further, in the above-described embodiment, the side frames 10 to which the first airbag module 50 is fixed are arranged on the left and right inside of the vehicle body, but may be arranged on the left and right outside of the vehicle body.

Further, in the above-described embodiment, the vehicle seat S mounted on the automobile is exemplified as the vehicle seat, but the vehicle seat is not limited to this, and the vehicle seat is a vehicle other than the automobile, for example, a railroad vehicle, a ship, an aircraft, or the like. It may be a seat mounted on the vehicle.

In addition, the elements described in the above-described embodiments and modifications can be combined and implemented as appropriate.

10 Side frame 11 Lower side frame 12 Bead part 12A 1st bead part 12B 2nd bead part 13A 1st fixing hole 13B 2nd fixing hole 21 Upper side frame 50 1st airbag module 51 1st airbag 52 1st inflator 52A Spout 52B Bolt 60 2nd airbag module 61 2nd airbag 62 2nd inflator 71 1st break 72 2nd break 100 1st force cloth 110 1st main body 120 1st lower extension 130 1st Upper extension part 152 1st upper overlap part 160 thread 200 2nd force cloth 210 2nd main body part 220 2nd lower extension part 230 2nd upper extension part F seat frame PD pad S vehicle seat SK skin W1 1st 1 joint W2 2nd joint

Claims (10)

A seat frame having a first side frame and a second side frame arranged apart from each other on the left and right,
A first airbag module having a first airbag and a first inflator for supplying gas into the first airbag and fixed to the first side frame, and a first airbag module.
The pad covering the seat frame and
An epidermis that covers the seat frame and the pad and has a first fracture portion that is fractured when the first airbag is deployed.
A first force cloth that regulates the deployment direction of the first airbag is provided.
The first force cloth is
A first force cloth material formed by weaving a first thread and a second thread, the first direction in which the first thread extends is less likely to extend than the second direction in which the second thread extends. Consisting of Rikifuhara
A first main body portion to which one end is sewn to the first broken portion, a first lower extending portion extending from the other end of the first main body portion and fixed to the first side frame, and the first. 1 The other end of the main body has a first upper extending portion that extends from a position above the first lower extending portion and is fixed to the first side frame.
The first lower extending portion extends in a direction intersecting the first direction.
The first upper extending portion is a vehicle seat characterized in that it extends along the first direction. The vehicle seat according to claim 1, wherein the first side frame to which the first airbag module is fixed is arranged on the left and right inside of the vehicle body. The first side frame has a lower side frame and an upper side frame joined to the upper part of the lower side frame.
The joint portion between the lower side frame and the upper side frame includes a first joint portion and a second joint portion located above the first joint portion.
The first or second aspect of the invention, wherein the first airbag module is arranged from a position below the first joint to a position above the second joint. Vehicle seat. The first airbag module is arranged outside the first side frame in the left-right direction of the vehicle seat, and is covered with the skin without the pad. The vehicle seat according to any one of claims 3. The first inflator has a gas outlet and
In the vertical direction, the spout has a position where the first upper extending portion of the first side frame is fixed and a position where the first lower extending portion of the first side frame is fixed. The vehicle seat according to any one of claims 1 to 4, wherein the seat is arranged between the two. The first force cloth has a folded and overlapped overlapping portion including the first upper extending portion.
The vehicle sheet according to any one of claims 1 to 5, wherein the overlapping portion is sewn by sewing in a Z shape with a thread. The vehicle seat according to claim 6, wherein the folded portion of the overlapping portion is folded in the first direction. The first side frame has a bead portion that is convex in one direction in the left-right direction.
The bead portion has a first bead portion extending vertically and two second bead portions extending from the first bead portion in a direction different from that of the first bead portion.
Any one of claims 1 to 7, wherein the first airbag module has at least one fixing portion fixed to the first side frame between the two second bead portions. The vehicle seat according to item 1. A second airbag module having a second airbag and a second inflator for supplying gas into the second airbag and fixed to the second side frame, and a second airbag module.
A second force cloth that regulates the deployment direction of the second airbag is provided.
The skin has a second break that breaks when the second airbag is deployed.
The second force cloth has one end sewn to the second break portion and has a shape different from that of the first force cloth, according to any one of claims 1 to 8. The listed vehicle seat. The second cloth is
A second force cloth material formed by weaving a third thread and a fourth thread, in which the third direction in which the third thread extends is less likely to extend than the fourth direction in which the fourth thread extends. Consisting of Rikifuhara
A second main body portion whose one end is sewn to the second broken portion, a second upper extending portion extending from the other end of the second main body portion and fixed to the second side frame, and the second upper extending portion. It has a second lower extending portion that extends from a position below the second upper extending portion of the other end of the main body and is fixed to the second side frame.
The second upper extending portion extends in a direction intersecting with the third direction.
The vehicle seat according to claim 9, wherein the second lower extending portion extends along the third direction.

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