JP2019182112A - Vehicle seat - Google Patents

Abstract

To provide a vehicle seat equipped with an air bag module, in which members housed inside a seat back are disposed at easily visually recognizable positions.SOLUTION: A vehicle seat 1 includes: a frame-type seat back frame part 19 that includes a pair of right and left side members 26, and forms a skeleton of a seat back 5; attachment members 501 and 502; an air bag module connected to the attachment members; a pad member 21 disposed in front of the air bag module; a skin member 22 including a fragile part 57 to be torn by a predetermined or larger load; a route 522 disposed on the pad member, and connecting the air bag module and the fragile part; a wire member 520 having one end connected to a side member of a vehicular exterior side, a hooking part 521 disposed in front of the air bag module and the other end connected to the side member of the vehicular exterior side; and a piece of webbing connected to the fragile part at the one end, and connected to the hooking part at the other end.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a vehicle seat provided with an airbag.

  A vehicle seat for the rear seat, with an airbag module in the seat back, a standing position where the seat back stands up and functions as a backrest, the seat back is moved forward, and the back of the seat back is the luggage compartment Some are displaceable between the floor surface and a continuous storage position (for example, Patent Document 1). The vehicle seat of Patent Document 1 includes a seat back frame serving as a skeleton on the seat back. The seat back frame includes a square frame type back frame and a plate-like back panel coupled to the back surface of the back frame. The airbag module is fastened to the surface of the back panel on the back frame side.

Japanese Patent No. 5169864

  The airbag module is coupled to the seat back frame after the pad member is put on the front surface of the seat back frame. When the seat back frame is covered with a pad member, the front surface of the seat back frame is covered with the pad member, so the members housed inside the seat back such as the air bag module and the webbing that guides the deployment direction of the air bag are combined. After doing so, it is difficult to confirm that it is in the proper position.

  This invention makes it a subject to arrange | position the member accommodated in the inside of a seat back in the position which is easy to visually recognize in the vehicle seat provided with the airbag module in view of the above background.

  In order to solve the above-described problems, a vehicle seat (1) according to the present invention includes a pair of left and right side members (26) extending vertically and forms a skeleton of a seat back (5). A frame portion (19), mounting members (501, 502) coupled to the side members outside the vehicle, an air bag module coupled to the mounting member, and a pad member provided in front of the air bag module (21), a skin member (22) that covers the front surface of the pad member and includes a fragile portion (57) that is cleaved by a load greater than or equal to a predetermined load, and provided on the pad member, the airbag module and the fragile member A passage (522) that connects the two parts, one end coupled to the side member on the outside of the vehicle, and a latching part (521) provided in front of the airbag module A wire member (520) having the other end coupled to the side member on the outside of the vehicle, a force cloth coupled to the fragile portion at one end, passing through the passage, and coupled to the latching portion at the other end It is characterized by having.

  According to this aspect, the webbing is coupled to the latching portion located in front of the airbag module. Since the latching portion is located in front of the air bag module, it can be seen from the side of the seat back, so that it is possible to easily confirm that the webbing is coupled to the appropriate position of the wire member. .

Moreover, according to one aspect of the present invention, the attachment member may include a hook (510) that is hooked to the hook portion.

  According to this aspect, by latching the attachment member to the wire member, the movement of the airbag module is restricted at the time of fastening, and the position of the airbag module is determined. This facilitates the assembly of the airbag module. Further, since the airbag module is hooked on the wire member for coupling the bundling to the side member, it is not necessary to separately provide a hooking member on the side member, and the configuration is simple.

  Further, according to one aspect of the present invention, the attachment member is coupled to the first attachment member (501) coupled to the vehicle exterior side surface of the side member on the vehicle exterior side, and the first attachment member, A second attachment member (502) coupled to the airbag module, the second attachment member is provided with a fastening portion (504), and the first attachment member is covered with a fastening member that can be fastened to the fastening portion. A fastening portion (506) is provided, the hook is hooked on the wire member, and the airbag module is rotated about the axis of the wire member, whereby the airbag module is connected to the fastening portion and the covered portion. It is good to guide to the position where a fastening part aligns.

  According to this aspect, the airbag module can be guided to an appropriate position where the fastening portion and the fastened portion are aligned by latching the hook on the wire member and rotating the airbag module. Thereby, an airbag module can be easily arrange | positioned in an appropriate position, and it becomes easy to fasten an airbag module to a side member.

  Moreover, according to one aspect of the present invention, it is preferable that the weakened portion and the hooking portion extend in a vertical direction substantially in parallel.

  According to this aspect, the webbing can be arranged along the fragile portion, so that the load due to the inflation of the airbag is easily concentrated on the fragile portion.

  According to the aspect of the invention, it is preferable that the hook is provided on a front edge of the second support member, and the fastening portion is provided on a rear edge of the second support member.

  According to this aspect, since the second support member is hooked to the wire member at the front edge and fastened to the side member at the rear edge, the connection between the second support member and the side member becomes strong. Thereby, it becomes difficult for an airbag module to move with respect to a side member, and the attitude | position of the airbag at the time of expansion | deployment can be stabilized.

  Moreover, according to one aspect of the present invention, the plate has a plate (20) extending from the rear edge of the side member located on the vehicle outer side to the vehicle outer side, and a first attachment is provided on the vehicle outer side surface of the side member on the vehicle outer side. A member (501) is provided, the fastening portion is provided at a rear edge of the first mounting member, and penetrates the plate along an axis of a fastener that fastens the fastening portion and the fastened portion. A through hole (74) may be provided.

  According to this aspect, the fastener can be accessed from the rear of the plate by inserting the tool into the through hole from the rear to the front. Thereby, since a 1st attachment member and a 2nd attachment member can be fastened from the back of a plate, the assembly | attachment of an airbag module becomes easy.

  Moreover, according to one aspect of the present invention, the airbag module may be configured such that the airbag (41) can be deployed forward, and the airbag module may be disposed forward of the fastening portion.

  According to this aspect, it is possible to prevent the airbag from coming into contact with the fastener at the time of deployment. Therefore, deformation of the airbag due to contact between the airbag and the fastener can be prevented, and the airbag can be more reliably secured. Can be deployed.

  According to the above aspect, in the vehicle seat provided with the airbag module, since the bundling is coupled to the latching portion located in front of the airbag module, the seat is provided in the vehicle seat provided with the airbag module. The member accommodated in the inside of the bag can be arranged at a position where it can be easily seen.

  Further, according to the aspect in which the attachment member includes the hook that is hooked on the hook portion, the movement of the airbag module is restricted at the time of fastening by hooking the attachment member to the wire member, and the position of the airbag module is Determined. This facilitates the assembly of the airbag module. Further, since the airbag module is hooked on the wire member for coupling the bundling to the side member, it is not necessary to separately provide a hooking member on the side member, and the configuration is simple.

  The mounting member includes a first mounting member coupled to a side surface on the vehicle outer side of the side member on the vehicle outer side, a second mounting member coupled to the airbag module and coupled to the first mounting member, The second mounting member is provided with a fastening portion (504), and the first mounting member is provided with a fastened portion (506) that can be fastened to the fastening portion. According to the aspect in which the airbag module is guided to a position where the fastening portion and the fastened portion are aligned by rotating around the axis of the wire member, the airbag module By rotating the airbag module, the airbag module can be guided to an appropriate position where the fastening portion and the fastened portion are aligned. Thereby, an airbag module can be easily arrange | positioned in an appropriate position, and it becomes easy to fasten an airbag module to a side member.

  In addition, according to the mode in which the fragile portion and the latching portion extend in the vertical direction substantially parallel to each other, the load can be arranged along the fragile portion, so that the load due to the expansion of the airbag is concentrated on the fragile portion. It becomes easy to let.

  Further, according to the aspect in which the hook is provided on the front edge of the second support member and the fastening portion is provided on the rear edge of the second support member, the second support member is hooked on the wire member at the front edge, Since it is fastened to the side member at the rear edge, the connection between the second support member and the side member becomes strong. Thereby, it becomes difficult for an airbag module to move with respect to a side member, and the attitude | position of the airbag at the time of expansion | deployment can be stabilized.

  The vehicle further includes a plate extending from the rear edge of the side member located on the vehicle outer side to the vehicle outer side, a first mounting member is provided on the vehicle outer side surface of the vehicle side member, and a fastening portion is provided behind the first mounting member. According to the aspect in which the plate is provided with a through-hole that extends along the axis of the fastener that fastens the fastening portion and the fastened portion, the tool is directed to the through-hole from the rear to the front. The fasteners can be accessed from behind the plate. Thereby, since a 1st attachment member and a 2nd attachment member can be fastened from the back of a plate, the assembly | attachment of an airbag module becomes easy.

  Moreover, according to the aspect in which the airbag module is configured such that the airbag can be deployed forward, and the airbag module is disposed forward of the fastening portion, the airbag is prevented from contacting the fastener during deployment. Therefore, deformation of the airbag due to contact between the airbag and the fastener can be prevented, and the airbag can be deployed more reliably.

The perspective view of the vehicle seat of the use position which concerns on this invention Explanatory drawing for demonstrating the displacement from the (A) use position of the vehicle seat to the (B) storage position Perspective view from the front of the upper part of the frame of the vehicle seat IV-IV sectional view of FIG. Explanatory drawing which shows the movement of a retainer at the time of an airbag module fastening

  Hereinafter, with reference to the drawings, an embodiment in which a vehicle seat according to the present invention is applied to the rearmost rear seat of an automobile will be described. Hereinafter, the front and rear, the left and right, and the vertical direction are described with reference to the front of the vehicle. Further, as will be described later, the form and posture of the vehicle seat changes between the use position where the occupant is seated and the storage position deformed to expand the space in which the luggage can be accommodated. The shape of each component will be described with reference to the use position.

  As shown in FIG. 1, a vehicle seat 1 according to the present invention constitutes a left side portion of a rear seat in the second row in an automobile provided with two rows of seats in the front and rear. A vehicle seat 1 is provided on a floor 2 of an automobile, and a seat cushion 4 that supports a seated person's buttocks, a seat back 5 that is supported by a rear portion of the seat cushion 4 and functions as a backrest, And a headrest 6 provided on the upper portion. Behind the vehicle seat 1 is provided a substantially horizontal cargo floor 7 (see FIG. 2) connected to the tailgate (rear gate).

  The seat cushion 4 extends left and right, and constitutes a seating surface 9 for two passengers. Below the seat cushion 4, a pair of left and right lower rails 10 that are coupled to the upper surface of the floor 2 and extend in the front-rear direction are provided. An upper rail is coupled to the lower rail 10 so as to be slidable along the extending direction of the lower rail 10. The seat cushion 4 is supported by the floor 2 so as to be slidable back and forth via the lower rail 10 and the upper rail.

  The seat back 5 extends in the vertical direction and has a substantially rectangular parallelepiped shape having a surface facing forward. A support surface 12 that supports the backs of two passengers is formed on the front surface of the seat back 5. The seat back 5 is rotatably coupled to the rear end of the frame constituting the seat cushion 4 at a lower end thereof via a known reclining mechanism.

  Two headrests 6 are provided on the upper end of the seat back 5 side by side. Each of the headrests 6 is coupled to the seatback 5 at the lower end so as to be rotatable about the left-right direction as an axis.

  A strap 15 is provided at the lower part of the seat cushion 4 so as to protrude outward from the vehicle. When the strap 15 is pulled to the outside of the vehicle, the vehicle seat 1 is moved from the use position (FIG. 2 (A)) where the occupant can sit, as shown in FIG. The space in which the luggage can be accommodated is displaced to the expanded storage position (FIG. 2B). When the vehicle seat 1 is in the use position, the seating surface 9 of the seat cushion 4 faces upward to support the seated person's buttocks, and the support surface 12 of the seat back 5 faces substantially forward to support the seated person's back. It is suitable. When the vehicle seat 1 is displaced from the use position to the storage position, the seat cushion 4 is lifted at the rear and moved forward (the chain double-dashed line in FIG. 2A), and the seating surface 9 is directed forward. . At the same time, the seat back 5 is tilted forward and rotated about the lower end (the two-dot chain line in FIG. 2A), and the support surface 12 faces substantially downward and the back surface extends substantially horizontally. When the vehicle seat 1 is in the retracted position, the back surface of the seat back 5 is continuous with the cargo compartment floor surface 7, and a load can be placed on the back surface of the seat back 5. As shown in FIG. 2A, the headrest 6 also has a lateral direction with respect to the seat back 5 so that the movement of the seat back 5 is not hindered when the vehicle seat 1 is displaced from the use position to the storage position. It is good to rotate forward as an axis.

  In the present embodiment, a predetermined lever 17 is provided at the upper left end of the seat back 5. If the lever 17 is operated when the vehicle seat 1 is in the use position, the seat back 5 can be rotated with respect to the seat cushion 4. Thereby, a seated person can adjust the angle with respect to the seat cushion 4 of the seat back 5 according to his / her physique.

  Next, the structure of the seat back 5 will be described with reference to FIGS. 3 and 4. As shown in FIG. 4, the seat back 5 is provided on the seat back frame 18 as a skeleton, the pad member 21 supported by the seat back frame 18, and the front surface of the pad member 21, and constitutes the outer surface of the seat back 5. And the airbag module 23 supported by the seat back frame 18.

  As shown in FIG. 3, the seat back frame 18 forms a skeleton of the seat back 5 and forms a substantially quadrangular frame shape, and a pan arranged at the rear of the seat back frame frame portion 19. And a frame 20 (plate). The seat back frame frame portion 19 includes a pair of left and right side frames 26 (side members) extending vertically, an upper frame 27 extending left and right and coupled to the upper ends of the left and right side frames 26, and left and right side frames. A lower frame (not shown) coupled to the lower portion of each frame 26. The side frame upper portion 26U and the upper frame 27 that respectively constitute the upper portions of the left and right side frames 26 are formed by bending one circular pipe member 29 into an inverted U-shaped gate shape. The side frame lower portions 26 </ b> D that respectively constitute the lower portions of the left and right side frames 26 are formed by sheet metal members 30 having surfaces that face in the left-right direction. In the upper part, the sheet metal member 30 is welded to the end of the pipe material 29 on the inner surface of the sheet. The front and rear edges of the sheet metal member 30 are bent toward the inside of the sheet. The lower ends of the left and right side frames 26 are rotatably coupled to the frame constituting the seat cushion 4 via a reclining mechanism.

  The pan frame 20 is a metal plate-like member, and is disposed on the rear side of the two side frames 26 and the upper frame 27 so that the surfaces thereof face front and rear. The pan frame 20 includes a pan frame base portion 31 that covers the rear portions of the side frame 26, the upper frame 27, and the lower frame, and a pan frame extension portion 32 that extends from the pan frame base portion 31 to the left side of the side frame 26 on the vehicle outer side (left side). And. The pan frame 20 is welded to the upper frame 27 at the upper edge, welded to the lower frame at the lower edge, and welded to appropriate positions of the left and right side frames 26 at the left and right side edges. A plurality of reinforcing beads and lightening holes may be provided at appropriate positions on the bread frame base 31.

  The left side frame 26 is directly coupled with a pair of upper and lower brackets 501 (first mounting members). One retainer 502 (second mounting member) that holds the airbag module 23 is directly coupled to the two brackets 501. The airbag module 23 is coupled to the side frame 26 via a retainer 502 and a bracket 501. The airbag module 23 has a substantially rectangular parallelepiped shape extending along the extending direction of the side frame 26 and is disposed so that the outer surface thereof faces in the left-right direction.

  As shown in FIG. 4, the airbag module 23 accommodates the airbag 41, an inflator 42 that releases gas into the airbag 41 and inflates and deploys the airbag 41, and the airbag 41 and the inflator 42. A rectangular parallelepiped case 43 is provided. The inflator 42 has a substantially cylindrical shape, and includes an external thread portion 44 that protrudes radially outward on the outer peripheral surface thereof.

  The case 43 has a substantially rectangular parallelepiped shape, and includes a metal case body 45 having an opening on the left side surface and a resin lid body 46 that covers the opening of the case body 45. The case main body 45 includes a substantially rectangular bottom wall and a side wall coupled to the outer peripheral edge of the bottom wall. The bottom wall of the case main body 45 is provided with a through hole 48 that penetrates in a thickness direction at a predetermined position. The airbag 41 is folded and accommodated in the case main body 45.

  The male thread portion 44 protrudes from the inside of the case body 45 through the through hole 48 to the outside. The airbag module 23 is coupled to the retainer 502 by fastening the male screw portion 44 to the retainer 502.

  The lid body 46 has a substantially rectangular shape, and has a resin plate shape that faces in the left-right direction. In the present embodiment, a cylindrical portion that protrudes toward the case main body 45 and fits into the opening of the case main body 45 is coupled to the outer peripheral edge of the lid 46. A plurality of locking claws that protrude outward in the circumferential direction are formed on the outer peripheral surface of the cylindrical portion. A plurality of through holes are provided in the side wall of the case body 45, and the locking claws are respectively locked in the through holes. Thereby, the lid body 46 is coupled to the case main body 45.

  The lid 46 is provided with a groove-like weak portion 46W along its front edge and upper and lower edges, and a thin hinge 46H is provided along its rear edge. As a result, when a leftward load is applied to the lid body 46, the lid body 46 is cleaved at the fragile portion 46W, the central portion of the lid body 46 rotates about the hinge 46H, and the case body 45 opens. .

  The pan frame extending portion 32 extends leftward from the left side frame 26 and reaches the left side of the left end of the airbag module 23. The pan frame extending part 32 is located at a position spaced rearward of the airbag module 23, and a gap S is provided between the pan frame 20 and the airbag module 23 in the front-rear direction. On the left edge of the pan frame extending portion 32, a folded portion 32A bent forward is provided in order to increase the rigidity of the pan frame 20. In the present embodiment, the upper edge of the pan frame 20 is also folded back in the same manner as the left edge and the left edge of the pan frame extending portion 32.

  The pad member 21 is formed from a flexible cushion material such as polyurethane foam. As shown in FIG. 4, the pad member 21 includes a front surface portion 50 located behind the support surface 12 and a left side surface portion 51 extending rearward from the left edge of the front surface portion 50. The front surface portion 50 and the left side surface portion 51 are each composed of a separate cushion material. The front portion 50 passes through the front side of the side frame 26, the bracket 501, and the retainer 502, and extends to the left front side of the airbag module 23. The left side surface portion 51 extends rearward from the left front of the airbag module 23, passes through the left side of the airbag module 23, and reaches a position that is substantially aligned with the rear surface of the pan frame 20 in the front-rear direction.

  The skin member 22 is formed by sewing a plurality of sheet-like members such as cloth and leather. The skin member 22 has a front sheet material 54 that covers the surface of the front surface portion 50, and a left side sheet material 55 that covers the left side surface of the left side surface portion 51. The left edge of the front sheet material 54 and the front edge of the left sheet material 55 are stitched together to form a stitched portion 57. The stitched portion 57 functions as a fragile portion in the skin member 22 that is broken by a smaller load than other stitched portions. As shown in FIG. 1, the stitching portion 57 extends vertically along the left front edge of the seat back 5.

  On the rear surface of the bread frame 20, a back sheet material 58 formed of a sheet-like member such as cloth or leather is provided in the same manner as the skin member 22. One end of the back sheet material 58 is coupled to the rear edge of the left side sheet material 55 via a line fastener 59.

  The vehicle seat 1 is provided with a predetermined sensor 60 at a predetermined position for detecting a load applied to the passenger in the rear seat. The sensor 60 may be, for example, a tension sensor that detects a tension applied to a seat belt worn by a passenger in the rear seat or an acceleration sensor that detects an acceleration applied to the vehicle seat 1. A control device 61 that is electrically connected to the sensor 60 and the inflator 42 and controls the driving of the inflator 42 based on the load detected by the sensor 60 is provided below the vehicle seat 1. In the present embodiment, the control device 61 is provided on the vehicle seat 1, but may be provided at any position on the vehicle body.

  Next, details of the shapes of the bracket 501 and the retainer 502 will be described.

  As shown in FIG. 3, the upper bracket 501U is a bent sheet metal member, welded to the pipe member 29 constituting the side frame upper portion 26U at the rear end, and extends obliquely leftward and forward. The lower bracket 501D is a sheet metal member that is bent in the same manner as the upper bracket 501U, and is welded to the rear surface of the sheet metal member that forms the upper portion of the side frame lower portion 26D at the rear end. A bracket inclined wall 503 is formed on the front part of the upper bracket 501U and the front part of the lower bracket 501D. The bracket inclined wall 503 is provided with a bolt hole 504 (fastening portion) penetrating in the thickness direction. A nut is welded to the front face of the bracket inclined wall 503 at a position aligned with the bolt hole 504.

  The retainer 502 is a bent sheet metal member, and extends in the front-rear and up-down directions, and has a plate-like retainer base 505 that faces in the left-right direction and a plate-like shape that is connected to the rear edge of the retainer base 505 and tilts to the right toward the rear The retainer inclined wall 506 and the retainer front portion 507 connected to the front edge of the retainer base portion 505 are provided. The retainer base 505 is provided with a bolt hole 508 penetrating in the thickness direction. By fastening the male thread portion 44 of the inflator 42 to the bolt hole 508, the airbag module 23 is held on the left side surface of the retainer base portion 505.

  Bolt holes 509 are formed in the retainer inclined wall 506. The retainer inclined wall 506 (fastened portion) is disposed along the rear surface of the bracket inclined wall 503 and is fastened to the bracket inclined wall 503 by bolts 72 (fasteners) that pass through the two bolt holes 504 and 509. As a result, the retainer 502 is coupled to the bracket 501.

  The retainer front portion 507 has a plate shape inclined forward from the front edge of the retainer base portion 505 toward the right. As shown in FIG. 4, a hook 510 that protrudes in the form of a plate forward and is curved in a circular arc shape to the right at the protruding end is provided at a substantially central portion in the vertical direction of the front edge of the retainer front portion 507.

  The pan frame 20 is provided with a tool hole 74 for operating the head of the bolt 72. The tool hole 74 is a hole that penetrates the pan frame 20 and is provided on an extension line of the axis X of the bolt 72. The tool hole 74 is set to a size that allows a tool (for example, a universal wrench) for fastening the bolt 72 to be inserted. The pan frame 20 is provided with a resin sealing member 75 for sealing the tool hole 74.

  As shown in FIG. 3, a wire member 520 is coupled to the left side frame 26. The wire member 520 is formed by bending a metal round bar, and is welded to the left side surface of the sheet metal member 30 at one end and to the front surface of the pipe material 29 at the other end. The wire member 520 is provided with a hooking portion 521 extending vertically along the extending direction of the left side frame 26 at a substantially central portion. The latching part 521 is located in front of the airbag module 23, to the left of the side frame 26 and to the right of the retainer base 505, and in front of the bracket inclined wall 503. The hook 510 is hooked and locked to the wire member 520. Accordingly, the retainer 502 is hooked to the wire member 520 at the front end, and fastened to the bracket 501 at the rear end.

  The skin member 22 is provided with a webbing 96. The webbing 96 is formed of a sheet-like member that is less stretchable than the skin member 22. One end of the force cloth 96 is stitched to the front sheet material 54 and the left sheet material 55 at the stitching portion 57.

  Since the front surface portion 50 and the left side surface portion 51 are formed of separate cushion materials, a passage 522 is formed therebetween. The force cloth 96 passes from one end through a passage 522 formed between the front surface portion 50 and the left side surface portion 51 and reaches the hook portion 521 of the wire member 520. A hook 97 is provided at the other end of the force cloth 96, and the hook 97 is hooked on the hooking portion 521 of the wire member 520.

  Next, the operation of the vehicle seat 1 will be described. When the sensor 60 detects that the acceleration of the occupant in the rear seat and the load applied to the seat belt have reached a predetermined value or more, the control device 61 controls the inflator 42 to supply gas into the airbag 41. As a result, gas is released from the inflator 42 and the airbag 41 is inflated to press the lid 46 to the left. As a result, the fragile portion 46W is cleaved and the case 43 is opened.

  The airbag 41 is inflated leftward and forward by the gas supplied from the inflator 42, passes between the front surface portion 50 and the left side surface portion 51, and reaches the stitched portion 57. At this time, a load is applied to the webbing 96 due to the inflation of the airbag 41. Due to the load applied by the force cloth 96, the stitching portion 57 is broken, and an opening is formed at the upper left end of the front surface of the seat back 5. The airbag 41 is inflated to the left front of the seat back 5 through the opening of the seat back 5, and is deployed between the seated person and the passenger compartment side wall.

  Next, the effect of the vehicle seat 1 will be described. The webbing 96 is coupled to a hooking portion located in front of the airbag module 23. Since the latching part 521 is located in front of the airbag module 23, it can be visually recognized from the side. Thereby, it can be easily confirmed that the webbing 96 is coupled to an appropriate position of the wire member 520.

  In the vehicle seat 1 including the airbag 41, when the airbag 41 is deployed, a load (reaction force) opposite to the deployment direction of the airbag 41 is applied to the frame that supports the airbag module 23. In order to make the deployment direction of the airbag 41 more appropriate and to stabilize the deployment of the airbag 41, the frame that supports the airbag module 23 has a rigidity that can sufficiently resist the reaction force applied when the airbag 41 is deployed. Is required.

  The pan frame 20 is formed of a substantially flat sheet metal member that covers the rear surfaces of the left and right side frames 26. In order to couple the airbag module 23 to the pan frame 20 and to give the pan frame 20 sufficient rigidity to counteract the reaction force applied when the airbag 41 is deployed, it is necessary to increase the plate thickness. However, when the plate thickness of the pan frame 20 is increased, the weight of the seat back frame 18 is increased.

  In the vehicle seat 1, the airbag module 23 is coupled to the side frame 26. An upper portion of the side frame 26 is formed by a pipe material 29. The lower portion of the side frame 26 is formed by a sheet metal member 30 that is bent at the front and rear edges toward the inside of the sheet. Therefore, the side frame 26 has higher rigidity than the plate-like pan frame 20. By connecting the airbag module 23 to the side frame 26, the plate thickness of the pan frame 20 can be reduced as compared with the case where the airbag module 23 is supported by the pan frame 20. Thus, the posture of the airbag module 23 can be stabilized against the reaction force applied when the airbag 41 is deployed, and the seat back 5 can be reduced in weight.

  As shown in FIG. 2, when the vehicle seat 1 is set to the storage position, the back surface of the seat back 5 is continuous with the cargo compartment floor surface 7, and the area for placing the luggage can be expanded. In order to widen such a region, it is preferable to make the pan frame 20 as large as possible. Therefore, it is conceivable to extend the pan frame 20 to the left of the left side frame 26. However, when the pan frame 20 is extended, it becomes difficult to access the left side surface of the side frame 26 from the rear of the seat back 5 after the pad member 21 is disposed on the front surface of the seat back frame 18. For this reason, it is difficult to fasten the airbag module 23 to the side frame 26.

  As shown in FIG. 4, a tool hole 74 is provided in the pan frame 20 of the vehicle seat 1. Thereby, the tool can be inserted into the tool hole 74 from the rear side of the pan frame 20, and the bolt 72 for fastening the retainer 502 and the bracket 501 can be tightened from the rear side of the pan frame 20. Thereby, the airbag module 23 can be easily fastened to the side frame 26 from behind the seat back 5.

  As shown in FIG. 5, after the hook 510 is hooked on the hooking portion 521, the retainer 502 is rotated counterclockwise (in the direction of the arrow) around the axis of the hooking portion 521 extending in the vertical direction. 502 is guided with respect to the bracket 501 to an appropriate position (two-dot chain line in FIG. 5) where the two bolt holes 504 and 509 are aligned. Thereby, the retainer 502 and the airbag module 23 can be easily positioned at appropriate positions. Thereby, the two bolt holes 504 and 509 can be easily passed by tightening the bolt 72, and the airbag module 23 can be easily coupled to the side frame 26. Moreover, since the hook 510 is latched by the latching | locking part 521, the movement to the back of the airbag module 23 is controlled, and it is easy to maintain the airbag module 23 in an appropriate position.

  The wire member 520 serves not only to position the airbag module 23 coupled to the side frame 26 to an appropriate position, but also to support the end of the webbing 96 and concentrate the load due to the inflation of the airbag 41. Fulfill. As described above, the wire member 520 for supporting the baffle 96 by being coupled to the side frame 26 is used for positioning the airbag module 23. Thereby, it is not necessary to provide a separate member for positioning the airbag module 23. Thereby, the structure of the vehicle seat 1 can be simplified.

  In the present embodiment, even after the airbag module 23 is assembled, as shown in FIG. 3, the retainer 502 is hooked on the wire member 520 at the front edge. The retainer 502 is fastened to the side frame 26 by bolts 72 at the rear edge. Since the retainer 502 is coupled to the side frame 26 at the front and rear, the retainer 502 and the side frame 26 are sufficiently coupled to each other, and the airbag module 23 is difficult to move with respect to the side frame 26. Thereby, the attitude | position of the airbag 41 at the time of expansion | deployment can be stabilized.

  Compared with the case where the bolt 72 is fastened to the wall extending in the left-right direction, the amount of protrusion of the bolt 72 toward the rear of the head is smaller when the bolt 72 is fastened to the wall inclined with respect to the left-right direction. In the present embodiment, the amount of protrusion of the head of the bolt 72 to the rear can be reduced by inclining the bracket inclined wall 503 to which the bolt 72 is fastened with respect to the left-right direction. Further, since the rear surface of the bracket inclined wall 503 faces obliquely rearward, the head of the bolt 72 can be visually recognized from the rear of the pan frame 20, and the fastening work of the retainer 502 and the bracket 501 is easy.

  The pan frame 20 is provided with a sealing member 75 that seals the tool hole 74. Therefore, the back surface of the seat back 5 can be made flatter, and the stability of the luggage placed on the back surface of the seat back 5 can be improved when the vehicle seat 1 is in the storage position. Further, when the tool hole 74 is sealed by the sealing member 75, when the vehicle seat 1 is in the storage position, even when a liquid such as water is applied to the back of the seat back 5 from the luggage, It is possible to prevent the liquid from dripping and reaching the airbag module 23.

  A gap S is provided between the pan frame 20 and the airbag module 23. Therefore, the load from the load placed on the back surface of the seat back 5 is not directly applied to the airbag module 23, and the change of the position of the airbag module 23 can be prevented.

  The airbag module 23 is fastened to the retainer 502 in front of the bracket inclined wall 503. Contact with the bolt 72 that fastens the retainer 502 and the bracket 501 of the airbag 41 during deployment can be prevented, and damage to the airbag 41 during deployment can be prevented. Thereby, the airbag 41 can be more reliably deployed.

  In addition, brackets 501 are provided on the side frame 26 at the top and bottom, and the airbag module 23 is coupled to the side frame 26 at two locations at the top and bottom. Thereby, compared with the case where the airbag module 23 is coupled to the side frame 26 at one location, the coupling between the airbag module 23 and the side frame 26 is strengthened, and the attitude of the airbag 41 during deployment is more enhanced. It can be stabilized.

  As shown in FIGS. 1 and 3, both the stitching portion 57 and the latching portion 521 extend vertically, and the webbing 96 is latched to the stitching portion 57 and the latching portion 521 at the end. As a result, the webbing 96 forms a surface that extends vertically and horizontally in front of the airbag module 23. Therefore, when the airbag 41 is inflated forward, a load is easily applied to the webbing 96, and the load due to the inflation of the airbag can be concentrated by the stitching portion 57.

  Although the description of the specific embodiment is finished as above, the present invention is not limited to the above embodiment and can be widely modified. In the above embodiment, the hook 510 is formed by curving the front end of the sheet metal member. However, the hook 510 may be in any form as long as it is rotatably coupled to the hooking portion 521, for example, the hook 510. May be configured by two plate members that respectively curve along the left and right side surfaces of the latching portion 521 and support the latching portion 521 from behind.

1: Vehicle seat 5: Seat back 19: Seat back frame frame portion 20: Pan frame 21: Pad member 22: Skin member 23: Air bag module 26: Side frame 41: Air bag 57: Suture portion 72: Bolt (fastened) Ingredients)
74: Tool hole 96: Force cloth 501: Bracket (expansion member)
502: Retainer (holding member)
504: Bolt hole (fastening portion)
506: Retainer inclined wall (fastened part)
510: Hook 520: Wire member 521: Hook 522: Passage

Claims (7)

A frame-type seat back frame frame portion that includes a pair of left and right side members extending vertically and forms a skeleton of the seat back;
A mounting member coupled to the side member outside the vehicle;
An airbag module coupled to the mounting member;
A pad member provided in front of the airbag module;
Covering the front surface of the pad member, and a skin member provided with a fragile portion that is cleaved by a predetermined load or more,
A path provided in the pad member, connecting the airbag module and the fragile portion;
A wire member having one end coupled to the side member on the outside of the vehicle, a hooking portion provided in front of the airbag module, and the other end coupled to the side member on the vehicle exterior;
A vehicular seat characterized by having a webbing that is coupled to the fragile portion at one end, passes through the passage, and is coupled to the hooking portion at the other end.   The vehicle seat according to claim 1, wherein the attachment member includes a hook that is hooked on the hook portion. The mounting member includes a first mounting member coupled to a side surface on the vehicle exterior side of the side member on the vehicle exterior side, and a second mounting member coupled to the first mounting member and coupled to the airbag module. Including
The second mounting member is provided with a fastening portion,
The first attachment member is provided with a fastened portion that can be fastened to the fastening portion,
By hooking the hook on the wire member and rotating the airbag module around the axis of the wire member, the airbag module is guided to a position where the fastening portion and the fastened portion are aligned. The vehicle seat according to claim 2, wherein the vehicle seat is provided.   The vehicle seat according to claim 3, wherein the fragile portion and the latching portion extend vertically in a substantially parallel manner.   The vehicle seat according to claim 4, wherein the hook is provided at a front edge of the second attachment member, and the fastening portion is provided at a rear edge of the second attachment member. A plate extending outward from the rear edge of the side member located outside the vehicle;
The first attachment member is provided on the vehicle outer side surface of the side member on the vehicle outer side,
The fastening portion is provided at a rear edge of the first mounting member;
6. The vehicle according to claim 4, wherein the plate is provided with a through-hole penetrating along an axis of a fastener that fastens the fastening portion and the fastened portion. Sheet. The airbag module is configured such that the airbag can be deployed forward,
The vehicle seat according to claim 6, wherein the airbag module is disposed in front of the fastening portion.

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