JP2007145181A - Air bag device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air bag device free to stably secure opening and closing of an exhaust port. <P>SOLUTION: This air bag device is furnished with an air bag having the exhaust port 42 free to exhaust a part of gas for expansion in opening and a flap material connected to a peripheral edge of the exhaust port 42 and free to open or close the exhaust port 42. The flap material 50 is constituted of a plurality of presser pieces 55 connected to the peripheral edge of the exhaust port 42 on the outer peripheral side of the air bag and free to close the exhaust port 42. The presser pieces 55 are dislocated and arranged so as to surround an overall periphery of the circumference of the exhaust port 42 with a connecting portion 52 with the air bag as a roughly linear hinge portion in opening when the exhaust port 42 is opened, and they are arranged so that they are accumulated flatly with each other free to close the exhaust port 42. The head end side separated from the hinge portion of an outer peripheral side presser piece 55A positioned the most outer peripheral side is connected to the opening and closing control device. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an airbag apparatus provided with an airbag that is inflated from a folded state during storage by allowing an inflating gas to flow in and is set so that an internal pressure during expansion can be suppressed.

  Conventionally, an airbag device is configured to inflate an airbag so as to protect an occupant seated in a seat, and an exhaust hole that allows a part of the inflation gas to be discharged is formed in the airbag. There is a configuration in which the discharge hole can be opened and closed by a flap material, and the opening and closing of the discharge hole is controlled according to the seating position and physique of the occupant to suppress the internal pressure when the airbag is inflated (for example, Patent Documents) 1).

In this airbag device, the flap material is made of a flexible sheet material and is set to a size capable of closing the discharge hole, and at least one end is sewn from the presser piece sewn to the airbag, It is configured. Then, an opening / closing control in which the sewing part of the presser piece to the airbag is a hinge part that opens when the discharge hole is opened, and the tip side away from the hinge part of the presser piece is arranged in the vicinity of the inflow opening in the airbag. It was the structure connected with an apparatus. And when the connection state with the opening / closing control apparatus was cancelled | released, the presser piece part was the structure which opened centering on the hinge site | part and the discharge hole was opened.
US Pat. No. 6,648,371

  However, in the conventional airbag device, the presser piece is configured to be sewn to the airbag also at a portion other than the hinge portion. For example, in the presser piece disclosed in FIG. 5, the part on the front end side connected to the opening / closing control device in the presser piece is also sewn to the airbag at the part that becomes the periphery of the discharge hole. Further, in the presser piece portion disclosed in Fig. 6, the periphery of the plurality of discharge holes, excluding the portion on the tip side connected to the opening / closing control device, is sewn to the airbag over the entire circumference. It was a structure to be worn. Therefore, in the conventional airbag device, the state of connection with the presser opening / closing control device is released, and further, the suture thread that sews the presser piece to the airbag breaks, and the presser piece and the airbag are separated. Since the discharge hole is opened only after the sewing state is released, if the suture does not break smoothly, the discharge hole is not opened, and it is difficult to stabilize the open state of the discharge hole. there were.

  Further, in the conventional airbag device, in the presser piece disclosed in FIG. 5, the presser piece is set to a dimension that can be inserted into the discharge hole. That is, when the airbag is deployed and inflated in a state of being connected to the opening / closing control device, the airbag is inflated with the discharge hole closed by the presser piece. The expansion gas leaks from the gap formed between the discharge hole and the pressing piece without being reliably closed. Therefore, in the conventional airbag device, it is difficult to stably maintain the closed state of the discharge hole and suppress the leakage of the inflation gas from the vicinity of the discharge hole.

  The present invention solves the above-described problems, and an object of the present invention is to provide an airbag device capable of stably securing the opening and closing of the discharge hole.

The airbag device according to the present invention allows an inflating gas to flow in, expands from a folded state during storage, and discharges a part of the inflating gas that flows in at the time of opening, thereby suppressing internal pressure during expansion. An airbag having a discharge hole, and
A flap material that is coupled to the periphery of the discharge hole of the airbag and that allows the discharge hole to be opened or closed;
When maintaining the state of connection with the flap material, the flap material maintains the closed state of the discharge hole, and when the connection state with the flap material is released, the flap material is connected to the flap material so as to open the discharge hole. An opening and closing control device;
An airbag device comprising:
The flap material is coupled to the peripheral edge of the discharge hole on the outer peripheral side of the airbag, and is composed of a plurality of flexible sheet-like press pieces each capable of closing the discharge hole,
The plurality of presser pieces are arranged so as to be substantially linearly arranged as a hinge part when opening the discharge hole when the discharge part is opened, and shifted so as to surround the entire circumference of the discharge hole, And disposed so as to be able to block the discharge hole by overlapping with each other flatly,
The outer peripheral side presser piece located on the outermost peripheral side when closing the discharge hole in the presser piece is connected to the opening / closing control device at the tip side away from the hinge part of the outer peripheral side presser piece. .

  In the airbag device of the present invention, a plurality of pressing pieces of the flap material that can open or close the discharge hole of the airbag are arranged on the outer peripheral side of the airbag. The piece is in the form of a flexible sheet that is coupled to the periphery of the discharge hole and can close the discharge hole. Each presser piece is disposed so as to be connected to the airbag as a hinge part at the time of opening the discharge hole, and shifted so as to surround the entire circumference of the discharge hole by this hinge part. In addition, when the discharge holes are closed, the discharge holes are closed by overlapping each other flatly. That is, in the airbag device of the present invention, the plurality of presser pieces are radially arranged around the discharge hole on the outer peripheral side of the airbag. And in the airbag apparatus of this invention, it is the structure which the outer peripheral side pressing piece located in the outermost peripheral side at the time of blockage | disconnection of a discharge hole connects the front end side away from the hinge site | part to an opening / closing control apparatus.

  Therefore, in the airbag device of the present invention, the hinge portion of each presser piece is formed so as to surround the periphery of the discharge hole over the entire circumference, and the presser piece portions overlap each other flatly to block the discharge hole. Therefore, when the airbag is inflated in a state where the outer circumferential side presser piece is maintained in the connected state with the opening / closing control device, the discharge hole can be closed without gaps by the plurality of presser piece portions, Gas leakage from the discharge hole can be suppressed as much as possible. Further, in the airbag device of the present invention, the plurality of presser pieces are arranged on the outer peripheral side of the airbag, and only the outer peripheral side presser piece is connected to the opening / closing control device. When the airbag is deployed and inflated in a state in which the connection state with the opening / closing control device of the side presser is released, the plurality of presser pieces are pressed by the inflation gas flowing into the airbag, and the hinge portions are respectively moved. It will open as the center and the discharge hole will open. That is, in the airbag device of the present invention, if the connection state with the opening / closing control device for the outer periphery side presser piece is released, each presser piece is naturally opened by being pressed by the inflating gas. Can be opened. At this time, since each presser piece has a hinge part in a straight line shape and is arranged so as to be shifted from each other, it can be opened smoothly at the time of opening, and the discharge hole can be stably formed. It can be opened.

  Therefore, in the airbag device of the present invention, it is possible to stably secure the opening and closing of the discharge hole.

Furthermore, in the airbag device of the present invention, at least three presser pieces are disposed,
At least one of the inner peripheral side presser pieces arranged on the inner peripheral side of the outer peripheral side presser piece, other from the inner peripheral side of the inner peripheral side presser piece to the outer peripheral side, or from the outer peripheral side to the inner peripheral side, etc. It is preferable to have a configuration in which a slit that allows the inner peripheral side pressing pieces to be inserted and the inner and outer side pressing pieces to be partially exchanged is exchanged.

  In the airbag device having the above-described configuration, the plurality of inner circumferential holding pieces arranged on the inner circumferential side of the outer circumferential holding piece overlap each other so that a part of the inner and outer holding pieces are exchanged when the discharge hole is closed. Therefore, even when the outer circumferential side presser piece is maintained in the state of being connected to the opening / closing control device, the inflation gas flows into the airbag and the inner circumferential side presser piece is pressed by the inflation gas. A frictional force is generated on the overlapping surfaces of the inner periphery side pressing pieces so as to exchange a part of the inner and outer sides, and the mutual overlapping state is not easily released. Therefore, when the airbag is deployed and inflated with the outer circumferential side holding piece being connected to the opening / closing control device, the inner circumferential side holding piece moves so as to be lifted from the discharge hole by being pressed by the inflation gas. This can be prevented and leakage of the expansion gas from the discharge hole can be further suppressed. Each inner periphery side presser piece is made of a flexible sheet material and is engaged with each other by a slit formed in this sheet material, so that the outer periphery side presser piece opens and closes. When the airbag is deployed and inflated in a state of being disconnected from the control device, the overlapping state of the inner circumferential side pressing pieces can be easily released by the pressing force of the inflation gas. The discharge hole can be opened without hindrance.

Furthermore, in the airbag device having the above-described configuration, the opening / closing control device is disposed in the vicinity of the inflow opening for the inflation gas of the airbag,
Dispose the discharge hole at a position away from the inflow opening,
It is preferable that the distal end side away from the hinge part of the outer periphery side pressing piece is connected to the opening / closing control device as a belt portion penetrating the peripheral edge in the vicinity of the discharge hole.

  If the airbag device has the above-described configuration, the discharge hole is disposed on the downstream side of the inflation gas away from the inflow opening of the airbag, and in a state where the inflation completion shape of the airbag is quickly secured, It becomes easy to suppress the internal pressure. Further, in the airbag device having the above-described configuration, each presser piece that closes the discharge hole and the opening / closing control device are arranged apart from each other, but the belt portion that is arranged on the distal end side of the outer peripheral side presser piece is provided. The structure is arranged so as to penetrate through the periphery in the vicinity of the discharge hole. That is, in the airbag device having the above-described configuration, the belt portion disposed on the outer circumferential side of the airbag on the outer circumferential side pressing piece side is penetrated at the circumferential edge near the discharge hole and disposed on the inner circumferential side of the airbag. It becomes. Therefore, when the airbag is deployed and inflated in a state where the belt portion is connected to the opening / closing control device, a portion of the belt portion located on the inner circumferential side of the airbag is used for inflating into the airbag. Since the gas is pressed against the side of the peripheral wall constituting the airbag, the belt portion does not sag so as to be largely separated from the peripheral wall constituting the airbag. Therefore, in the airbag device having the above configuration, even when the airbag is inflated in a state where the belt portion is connected to the opening / closing control device, the outer circumferential side holding piece is accurately pressed by the belt portion to the periphery of the discharge hole. And gas leakage from the discharge hole can be suppressed.

Furthermore, as an airbag device,
The flap material
It is composed of a flexible sheet-like stop piece that is coupled to the periphery of the discharge hole on the inner peripheral side of the airbag,
Stop piece
The connecting portion with the airbag is arranged in a substantially straight line as a hinge portion when opening the discharge hole, and the main body portion that can close the discharge hole is disposed on the tip side away from the hinge portion, A belt portion penetrating the periphery in the vicinity of the discharge hole and connected to the opening / closing control device,
The main body is set to a size that enables gas leakage prevention when closing the discharge hole, and allows the discharge hole to be inserted from the hinge part and protrude out of the airbag when the discharge hole is opened.
Use a belt that has a configuration in which at least a portion of the belt near the main body penetrates the periphery of the airbag in the vicinity of the discharge hole so that the discharge hole can be inserted through the discharge hole and protrude out of the airbag. May be.

  In the airbag device configured as described above, the main body portion of the stopper piece constituting the flap material is disposed on the inner peripheral side of the airbag, and is set to a size capable of preventing gas leakage when closing the discharge hole. . That is, in the airbag device configured as described above, when the airbag is deployed and inflated in a state where the flap material is kept connected to the opening / closing control device, the main body portion can close the discharge hole without gaps, And the gas leak from a discharge hole can also be prevented. Further, in the airbag device having the above configuration, the main body portion of the stopper piece portion and the opening / closing control device are disposed apart from each other, but the belt portion disposed on the distal end side of the main body portion is provided with the discharge hole. It is the structure arrange | positioned so that it may penetrate in the periphery of the vicinity. That is, in the airbag device configured as described above, the belt portion disposed on the inner peripheral side of the airbag on the main body portion side is penetrated at the peripheral edge in the vicinity of the discharge hole, and is disposed on the outer peripheral side of the airbag. Become. For this reason, the belt portion in a state in which the state of connection with the opening / closing control device is maintained is pressed by the peripheral wall constituting the airbag at the front end side portion penetrated by the peripheral edge in the vicinity of the discharge hole. As a result, even when the airbag is inflated in a state where the belt portion is connected to the opening / closing control device, the belt portion can be prevented from moving up from the discharge hole. The discharge hole can be properly closed, and gas leakage from the discharge hole can be suppressed.

  Moreover, in the airbag apparatus having the above-described configuration, the main body portion of the stopper piece is set to a size that allows the discharge hole to be inserted from the hinge portion and protrude out of the airbag when the discharge hole is opened. Therefore, when the airbag is deployed and inflated in a state where the connection state with the opening / closing control device is released, the main body is pressed by the inflation gas flowing into the airbag, It opens so that it may protrude outside an airbag from a discharge hole, and a discharge hole will open. Further, at this time, the belt portion moves so that the portion in the vicinity of the main body portion is projected outside the airbag together with the main body portion, and the main body portion can be projected outside the airbag without any trouble. That is, even in the airbag device having the above-described configuration, if the connection state to the opening / closing control device is released, the main body portion is naturally opened by being pressed by the inflation gas, so that the discharge hole can be stably opened. it can.

  Therefore, even in the airbag apparatus having the above configuration, it is possible to stably secure the opening and closing of the discharge hole.

Further, in the airbag device configured as described above, a distal end edge portion that extends on both sides so as to be orthogonal to the belt portion on the distal end side away from the hinge portion in the main body portion of the stopper piece and is disposed on the outer peripheral side of the belt portion. Provided,
Covering the hinge part side of the tip edge on the inner peripheral side of the main body part on the inner peripheral side of the airbag, and connecting the vicinity of both edges in the direction orthogonal to the belt part to the inner peripheral side of the airbag It has a sheet shape, and further, a presser frame material provided with a recess that can be inserted in the vicinity of the main body part side in the belt part, is disposed,
When the airbag is folded and stored, the front edge of the main body is folded and placed on the inner peripheral side of the presser frame material, and the belt is placed on the inner peripheral side of the folded leading edge. It is preferable to accommodate

  In the airbag device having the above-described configuration, the airbag is stored in a state where the distal end side of the main body portion of the stopper piece that is away from the hinge portion is closed by the folded distal end edge portion. Since the folded leading edge is sandwiched between the belt portion and the presser frame material, when the airbag is deployed and inflated in a state in which the connected state with the opening / closing control device is maintained. In this case, the state where the front end edge portion is folded back by being pressed by the belt portion is maintained. Therefore, when the airbag is deployed and inflated with the connection state with the opening / closing control device maintained, both side edges extending from the front edge of the main body of the stopper piece toward the hinge part are partially on the discharge hole side. It is prevented from being turned over, and the discharge hole can be closed with a stable sheet shape, and gas leakage from the discharge hole can be further suppressed.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 to 4 show an airbag apparatus M for a steering wheel that is an embodiment of the present invention.

  Note that the front / rear, up / down, and left / right directions in the embodiment are based on straight steering of the steering wheel W mounted on the vehicle unless otherwise specified, and the steering shaft SS (see FIG. 3) The vertical direction along the axial direction (refer to the two-dot chain line in FIG. 4) is the vertical direction, the longitudinal direction of the vehicle that is orthogonal to the steering shaft SS is the longitudinal direction, and the left and right of the vehicle that is orthogonal to the steering shaft SS is horizontal. As the direction, it indicates the front / rear / up / down / left / right directions.

  The airbag apparatus M is a structure arrange | positioned at the upper part in the boss | hub part B of the center of the steering wheel W, as shown to FIGS. The steering wheel W includes a ring portion R that is gripped during steering, a boss portion B that is disposed in the center and connected to the steering shaft SS, four spoke portions S that connect the boss portion B and the ring portion R, and It is configured with. In addition, the steering wheel W includes an airbag device M and a steering wheel body 1 on the component parts.

  The steering wheel body 1 includes a cored bar 2 made of an aluminum alloy or the like disposed so as to connect the ring part R, the boss part B, and the spoke part S, and the spoke part S on the ring part R and ring part R side. And a synthetic resin coating layer 3 for covering the core metal 2 and a synthetic resin lower cover 4 disposed below the boss B.

  As shown in FIG. 3, the airbag device M is a case in which a folded airbag 37, an inflator 8 that supplies inflation gas to the airbag 37, and a case that stores and holds the airbag 37 and the inflator 8. The bag holder 11, the pad 27 as an airbag cover disposed so as to cover the opening 11 a of the bag holder 11, and the horn switch 17 are connected to the bag holder 11 and the airbag apparatus M is steered. Two connection plates 21 for connection to the wheel body 1 and an opening / closing control device 23 for controlling the opening / closing of a discharge hole 42 described later formed in the airbag 37 are provided. The operation of the inflator 8 and the opening / closing control device 23 is controlled by the airbag operation control device 71.

  As shown in FIG. 1, the airbag operation control device 71 determines the weight of the position detection sensor 72 that can detect the distance between the steering wheel W and the occupant (driver) MD seated on the seat SE, or the weight of the driver MD. A weight sensor 73 that can be detected and a collision detection sensor 74 that can detect the direction of acceleration and acceleration of the vehicle are electrically connected, and electric signals from these sensors 72, 73, and 74 are input. Thus, the operation of the opening / closing control device 23 is controlled so that the inflator 8 is operated and the airbag 37 is inflated in a suitable inflation mode.

  The inflator 8 includes a substantially cylindrical main body 8a provided with a plurality of gas discharge ports 8b for discharging inflation gas at an upper portion, a substantially square plate-like flange portion 8c arranged to protrude from the outer peripheral surface of the main body 8a, It is configured with. The flange portion 8c is formed with an insertion hole 8d through which a bolt 6a protruding from a retainer 6 described later is inserted.

  The retainer 6 is made of a sheet metal having a substantially quadrangular annular body, and includes bolts 6a protruding downward at the four corners. The retainer 6 protrudes from the flange portion 8 c of the inflator 8 through the peripheral edge of the inflow opening 40 on the inner peripheral surface side of the airbag 37 and the bag holder 11. Then, by fastening the nut 7 to each bolt 6 a, the airbag 37 and the inflator 8 are attached to the bag holder 11 using the retainer 6.

  As shown in FIGS. 3 and 4, the bag holder 11 includes a holder body 12 made of sheet metal and two holding plates 16. The two holding plates 16 are fixed to the lower surface side on both the front and rear sides of the holder body 12.

  The holder main body 12 includes a substantially square plate-like bottom wall portion 13 and a side wall portion 14 that extends upward from the peripheral edge of the bottom wall portion 13 and has an upper end opened. In the vicinity of the center of the bottom wall portion 13, an insertion hole 13 a is formed that opens in a circular shape and allows the main body 8 a of the inflator 8 to be inserted from below to above. Four insertion holes 13b through which the bolts 6a of the retainer 6 are inserted are formed at the periphery of the insertion hole 13a. Further, a through hole 13c through which a loop portion 59 formed at a tip 58b of a belt portion 58 (described later) of the airbag 37 can be inserted is formed on the bottom wall portion 13 on the front side of the insertion hole 13a.

  Further, a locking member 23 as an opening / closing control device for connecting a front end 58b side of a belt portion 58 (to be described later) of the airbag 37 is provided on a lower side of the bottom wall portion 13 and in the vicinity of the through hole 13c. Arranged. The locking member 23 is fixed to the lower surface side of the bottom wall portion 13 so as to be able to retract the locking pin 24 inserted into a loop portion 59 formed at the front end 58b of the belt portion 58. And an actuator 25. When the actuator 25 is operated so as to retract the locking pin 24, the state in which the locking pin 24 locks the loop portion 59 shifts to a state in which the locking is released. If this actuator 25 can move the locking pin 24 by an electrical signal from the control device, a piston cylinder that uses fluid pressure including the case where hydraulic pressure, water pressure, air pressure, or inflating gas pressure such as an inflator is generated, A motor utilizing such fluid pressure or electricity, an electromagnetic solenoid, a spring utilizing an urging force at the time of restoration, or the like can be used. As shown in FIG. 5, the tip of the locking pin 24 of the locking member 23 is supported on the peripheral edge of the through hole 13 c on the lower surface of the bottom wall portion 13 and on the edge side facing the actuator 25. A support base 13d that prevents the loop portion 59 from coming off from the locking pin 24 during locking is provided.

  The side wall portion 14 of the holder body 12 is provided with locking claws 14a extending outward and downward at the upper ends of the front and rear portions, and these locking claws 14a are located at the front and rear positions of the side wall portion 31 described later of the pad 27. It will be locked to the step part 31a.

  The two front and rear holding plates 16 fixed to the holder main body 12 are each provided with holding portions 16a extending to the vicinity of the portion of the coating layer 3 in the vicinity of the ring portion R in the spoke portions S on both the left and right sides. A horn switch 17 is attached. Each holding plate 16 includes a mounting hole 16b through which the rivet 34 is inserted.

  The two connecting plates 21 are arranged in a belt shape along the front-rear direction on the lower surfaces of the left and right sides of the airbag device M, and a substantially intermediate portion in the front-rear direction is fixed to the core metal 2 of the steering wheel body 1. The front and rear ends are respectively disposed below the holding portions 16a at the left and right ends of the holding plate 16 and are configured to be supported by the cored bar 2 at the portion of the spoke portion S. ing. The front and rear ends of the connecting plate 21 and the holding portion 16a are supported by the left and right connecting plates 21 with the horn switch 17 interposed therebetween, and the connecting plate 21 is fixed to the core metal 2 so that the steering wheel. It is attached to the upper part of the boss part B of the main body 1.

  The pad 27 as the airbag cover is made of a synthetic resin such as an olefin-based thermoplastic elastomer, and as shown in FIGS. 2 to 4, a ceiling wall portion 28 that covers the upper side of the boss portion B, and a ceiling wall portion 28. The side wall part 31 of the substantially square cylinder shape extended below from the outer periphery of this is comprised. The inner side part of the side wall part 31 in the ceiling wall part 28 is configured as a part that covers the folded airbag 37, and a plurality of door parts 30 that are opened when the airbag 37 is inflated are parts to be broken around the part. 29 is provided. In the case of the embodiment, as shown in FIG. 2, two door portions 30 are arranged side by side along the front-rear direction, and are pressed by an airbag 37 into which an inflating gas has flowed into the interior, so that the surrounding H It is the structure which fractures | ruptures the character-shaped fracture | rupture scheduled part 29, and opens it back and forth. A plurality of mounting holes 32 penetrating in the horizontal direction are formed in the side wall portion 31. In these mounting holes 32, rivets 34 are inserted as fixing means for holding the pad 27 to the bag holder 11.

  As shown in FIGS. 6 and 8, the airbag 37 includes a bag-shaped bag body 38 that is inflated by inflating an inflating gas, a flap material 50 that can close a discharge hole 42 formed in the bag body 38, and And a tether 61 that regulates the shape of the bag main body 38 when the inflation is completed.

  In the bag body 38, the outer peripheral wall when the expansion is completed is formed of a flexible woven fabric made of polyamide yarn, polyester yarn or the like. The outer peripheral wall of the bag body 38 is disposed on the side of the steering wheel W when the expansion is completed, and has a vehicle body side wall portion 39 having an inflow opening 40 for allowing the inflating gas to flow in. It is comprised from the passenger | crew side wall part 45 used as the passenger | crew (driver | operator) side sometimes.

  The inflow opening 40 is a part for inserting the main body 8 a of the inflator 8 from below and allowing the inflation gas discharged from the gas discharge port 8 b of the inflator 8 to flow into the bag main body 38. Further, four attachment holes 41 through which the bolts 6 a formed in the retainer 6 are inserted are formed on the periphery of the inflow opening 40. A discharge hole 42 that is opened in a circular shape is formed in a portion of the vehicle body side wall 39 that is in front of the inflow opening 40. Further, between the discharge hole 42 and the inflow opening 40, belt portions 59, which will be described later, of the flap member 50 are provided at two locations near the rear side of the discharge hole 42 and near the front side of the inflow opening 40. Slit-like insertion holes 43 </ b> A and 43 </ b> B that are formed along the left-right direction so as to be inserted are provided.

  As shown in FIG. 7, the bag main body 38 includes a circular vehicle body side base cloth 47 that forms the vehicle body side wall portion 39 and a circular passenger side base cloth 48 that forms the passenger side wall portion 45. Yes. An opening 47 a constituting the inflow opening 40 is formed at the center of the vehicle body side fabric 47. The vehicle body side fabric 47 is provided with attachment holes 47b, discharge holes 47c, and insertion holes 47d at positions corresponding to the attachment holes 41, the discharge holes 42, and the insertion holes 43 (43A and 43B). Yes.

  As shown in FIGS. 6, 7, and 9, the flap member 50 is disposed on the outer peripheral side of the bag body 38 and can close the discharge hole 42, a belt portion 58 connected to the body cloth 51, It is composed of

  In the case of the embodiment, the main body cloth 51 is formed of a flexible woven cloth made of polyamide yarn, polyester yarn, or the like, similarly to the bag main body 38. As shown in FIG. 9, the main body cloth 51 is configured to be located at the center and to be connected to the periphery of the discharge hole 42 in the vehicle body side wall 47, and to extend from the connecting piece 52 to the front, rear, left and right. And four presser pieces 55 having a substantially square shape, and the outer shape is a substantially cross shape.

  In the case of the embodiment, the coupling piece 52 has a substantially square shape, and includes a through hole 52 a that opens in a circle corresponding to the discharge hole 42 in the vicinity of the center. The coupling piece 52 is sewn and coupled to the vehicle body side wall 39 around the entire periphery. The coupling portion 53 has a substantially square shape that surrounds the entire periphery of the through hole 52a (discharge hole 42), and each of the straight sides 53a has a presser piece 55 (55A, 55B, 55C, and 55). 55D), the hinge portion of each presser piece 55 (55A, 55B, 55C, 55D) is configured as a connecting portion for connecting the base portion side of 55D) to the airbag 37 (vehicle body side wall portion 39).

  Each presser piece 55 (55A, 55B, 55C, 55D) is radially arranged around the coupling piece 52. Specifically, it is arranged at four locations on both the front and rear sides and the left and right sides of the coupling piece 52. Thus, each has a substantially rectangular shape with a size capable of closing the discharge hole 42 (through hole 52a). The length of each side (hinge part) 53 a in the coupling part 53 is larger than the diameter of the discharge hole 42. In the case of the embodiment, the presser piece 55 </ b> A disposed on the front side of the coupling piece 52 is the outer peripheral presser piece positioned on the outermost peripheral side when the discharge hole 42 is closed. The presser pieces 55B, 55C, and 55D disposed on the rear side and the left and right sides of the coupling piece 52 are the inner peripheral side presser pieces disposed on the inner peripheral side of the outer peripheral side presser piece 55A. Become. In the case of the embodiment, the outer peripheral side pressing pieces 55B, 55C, and 55D have the same outer shape as the coupling piece 52, and the outer peripheral side pressing piece 55A is the inner peripheral side pressing piece 55B, 55C, and 55D. The outer shape is configured to be larger than the inner circumferential side pressing pieces 55B, 55C, and 55D so that the entire 55D can be covered.

  When the discharge hole 42 is closed, the other inner circumferential holding pieces 55B, 55C, and 55D are inserted into the inner circumferential holding pieces 55B, 55C, and 55D, and the inner circumferential holding pieces 55B, 55C, and 55D are mutually connected. A slit 56 is formed so that a part of the overlap can be exchanged. In the case of the embodiment, each of the slits 56 is a straight line extending in the front-rear direction at a position near the center in the left-right direction from the rear edge of each inner circumferential holding piece 55B, 55C, 55D to the substantially center in the front-rear direction. It is formed so as to provide a cut in the shape. When the inner circumferential holding pieces 55B, 55C, and 55D are overlapped with each other so as to block the discharge hole 42, the left side portions 55Bb, 55Cb, and 55Db or the right side portions 55Ba and 55Ca are utilized by using the slit 56. -It will be overlaid by changing the inside and outside of 55 Da.

  The belt portion 58 is composed of a belt-like cloth material having flexibility, and is connected to the outer peripheral side of the outer peripheral side pressing piece 55A. The belt portion 58 is sewn on the outer end side pressing piece 55A on one end 58a side, protrudes from the front edge side (tip side away from the hinge portion 53a) when the outer periphery side pressing piece portion 55A is opened, and extends along the front-rear direction. Thus, it will be arrange | positioned (refer FIG. 6). On the other end 58b side of the belt portion 58, a loop portion 59 configured by sewing the end portion into a ring shape is disposed. The loop portion 59 is configured so that the locking pin 24 of the locking member 23 can be inserted. As shown in FIGS. 3 and 5, when the airbag 37 is folded and stored, the locking pin 24 is inserted, It will be locked to the locking member 23.

  Further, as shown in FIGS. 6 and 8, the belt portion 58 is disposed so as to penetrate through the insertion holes 43A and 43B formed in the vehicle body side wall portion 39, and each presser piece 55A, 55B, 55C, In a state where 55D is overlapped so as to block the discharge hole 42, the intermediate portion 58c is positioned on the inner peripheral side of the bag main body 38 through the insertion hole 43A formed in the vicinity of the discharge hole 42, and the loop portion 59 As shown in FIG. 8, the front end 58b side is formed again through the insertion hole 43B formed in the vicinity of the inflow opening 40 so as to protrude out of the bag body 38. That is, when folding and storing the airbag 37, the belt portion 58 has both ends 58a and 58b positioned on the outer peripheral side of the bag main body 38, and the intermediate portion 58c is positioned on the inner peripheral side of the bag main body 38. Thus, the locking pin 24 of the locking member 23 is inserted into the loop portion 59 on the tip 58b side protruding from the insertion hole 43B. In the case of the embodiment, the belt portion 58 has a length dimension, and even when the airbag 37 is inflated in a state in which the loop portion 59 is maintained in the locked state with the locking pin 24, the airbag 37 has no problem. The dimensions are set so that the expansion can be completed.

  The tether 61 is formed of a flexible woven fabric made of polyamide yarn, polyester yarn or the like, like the bag body 38 and the main body cloth 51 of the flap member 50. As shown in FIG. 12, the tether 61 regulates the separation distance between the vehicle body side wall 39 and the occupant side wall 45 when the expansion of the bag body 38 is completed, thereby regulating the expansion completion shape of the bag body 38. The vehicle body side member 62 on the side wall portion 39 side and the occupant side member 66 on the occupant side wall portion 45 side are configured. The vehicle body side member 62 includes a reinforcing portion 63 that reinforces the periphery of the inflow opening 40, and belt-like extending portions 64 and 64 that extend from the left and right edges of the reinforcing portion 63. The reinforcing portion 63 has a substantially annular shape with a circular opening 63a corresponding to the inflow opening 40 in the vicinity of the center, and the periphery of the opening 63a corresponds to the attachment hole 41 and the insertion hole 43B. An attachment hole 63b and an insertion hole 63c are formed. The occupant side member 66 includes a substantially circular connecting portion 67 connected to the occupant side wall portion 45 side, and belt-like extending portions 68 and 68 extending from the left and right edges of the connecting portion 67. The tether 61 is configured such that the extended portions 64 and 68 of the vehicle body side and occupant side members 62 and 66 sew the ends together.

  Next, manufacture of the airbag 37 will be described. An opening 47a, an insertion hole 47d constituting the insertion hole 43A, and a discharge hole 47c are formed in the vehicle body side fabric 47 in advance. An opening 63 a is also formed in the vehicle body side member 62 of the tether 61 in advance. Also in the flap member 50, the end portion 58a of the belt portion 58 in which the loop portion 59 is formed on the outer circumferential side pressing piece 55A of the main body cloth 51, which is previously cut into a predetermined shape and has the through hole 52a and the slit 56 formed therein. Let's keep sewing.

  First, the main body cloth 51 is arranged on the outer surface side of the vehicle body-side base cloth 47 so that the through holes 52a correspond to the discharge holes 47c, and the main body cloth 51 of the flap member 50 is connected to the coupling part 52 using a suture thread. This is sewn to the vehicle body-side base cloth 47 at the part. Similarly, the vehicle body side member 62 of the tether 61 is placed on the inner surface side of the vehicle body side base fabric 47 so that the opening 47a of the reinforcing portion 63 corresponds to the opening 47a, and the periphery of the openings 47a and 63a is sewn. Let Further, the periphery of the connecting portion 67 of the occupant side member 66 of the tether 61 is sewn to the inner surface side of the occupant side fabric 48.

  Thereafter, the mounting hole 41 and the insertion hole 43 </ b> B are drilled on the vehicle body side base fabric 47 and the reinforcing portion 63. Of course, it is possible to provide the inflow opening 40 at the same time as the drilling process so that the openings 47a and 63a are not formed before the stitching.

  Next, the vehicle body side base fabric 47 and the occupant side base fabric 48 are overlapped so that the outer surface sides face each other, and the outer peripheral edges are sewn together. After the outer peripheral edge is sewn, the bag body 38 is reversed using the inflow opening 40 so that the seam allowance of the outer peripheral edge does not appear on the outer surface of the airbag 37. And after reversing, if the front-end | tip of each extension part 64 * 68 in the tether 61 is pulled out from the opening 40 for inflow, and sewn, the airbag 37 can be manufactured.

  And the airbag apparatus M is assembled using the airbag 37 manufactured as mentioned above. First, the discharge hole 42 is closed with the flap material 50. Specifically, in the airbag 37 in a state where the vehicle body side wall portion 39 is turned over so as to be placed on the occupant side wall portion 45 and flattened, as shown in FIG. From the developed state, first, as shown in FIG. 10B, the inner circumferential holding piece 55B located on the right side of the discharge hole 42 is folded back so as to cover the discharge hole 42 in the vicinity of the hinge part 53a, and then the discharge hole The inner circumferential side holding piece 55C located on the rear side of the belt 42 is folded back so as to cover the discharge hole 42 in the vicinity of the hinge portion 53a, and the slit 56 of each inner circumferential side holding piece 55B / 55C is used to perform C in FIG. As shown in FIG. 5, the left side portion 55Cb of the inner circumferential side holding piece 55C is positioned inside the right side portion 55Ba of the inner circumferential side holding piece 55B, and the right side portion 55Ca of the inner circumferential side holding piece 55C is placed on the inner circumferential side holding piece 55B. Outside the left part 55Bb As to the position, overlapping the inner circumferential side hold pieces 55B · 55C. Thereafter, the inner circumferential holding piece 55D located on the left side of the discharge hole 42 is folded back so as to cover the discharge hole 42 in the vicinity of the hinge portion 53a, and the slit 56 of each inner circumferential holding piece 55C / 55D is used to 11A, the left side portion 55Db of the inner circumferential side pressing piece 55D is positioned inside the right side portion 55Ca of the inner circumferential side pressing piece 55C, and the right side portion 55Da of the inner circumferential side pressing piece 55D is positioned on the inner circumferential side presser. The inner circumferential holding piece 55D is overlapped with the inner circumferential holding pieces 55B and 55C so as to be positioned outside the right side portion 55Ba of the piece 55B. Thereafter, as shown in FIG. 11B, the outer circumferential holding piece 55A is folded back in the vicinity of the hinge portion 53a so as to close the discharge hole 42, and the belt portion 58 is formed in the vicinity of the discharge hole 42 from the loop portion 59 side. It penetrates through the insertion hole 43A. Thereafter, if the loop portion 59 side portion of the belt portion 58 passes through the insertion hole 43B formed in the vicinity of the inflow opening 40 and the loop portion 59 protrudes to the outer peripheral side of the airbag 37, the flap material 50 The discharge hole 42 can be closed.

  Thereafter, the retainer 6 is inserted into the airbag 37 from the inflow opening 40, and each bolt 6 a is projected from the mounting hole 41. Next, the airbag 37 is folded so as to be housed in the bag holder 11 while maintaining the protruding state of the loop portion 59 from the insertion hole 43B.

  Next, each of the bolts 6a protrudes from the insertion hole 13b of the bottom wall portion 13 and the loop portion 59 protrudes from the through hole 13c. And the connection board 21 is accommodated in the bag holder 11 which has been attached. Then, the locking pin 24 of the locking member 23 is inserted through the loop portion 59, and the loop portion 59 is locked to the locking member 23 so that the front end side of the locking pin 24 is supported by the support base 13 d. Thereafter, the main body 8a of the inflator 8 is inserted into the insertion hole 13a of the bottom wall portion 13 from below, and each bolt 6a is protruded from the insertion hole 8d of the flange portion 8c. Then, the nut 7 is fastened to each bolt 6a, and the airbag 37 and the inflator 8 are held by the bag holder 11.

  Thereafter, the pad 27 is put on the airbag 37, the locking claw 14 a of the bag holder 11 is locked to the stepped portion 31 a of the side wall 31, and the bag holder 11 and the side wall 31 are fastened by the rivet 34. The airbag apparatus M can be assembled.

  The airbag apparatus M assembled in this manner can be obtained by connecting the connecting plate 21 to a mounting seat (not shown) of the steering wheel main body 1 already attached to the vehicle using a predetermined bolt. At this time, the assembly of the steering wheel W and the mounting of the steering wheel W to the vehicle are completed. When the airbag device M is mounted on a vehicle, an operation signal input lead wire extending from the control device 71 is connected to the inflator 8 and the locking member (opening / closing control device) 23.

  If the traveling vehicle collides after the airbag device M is mounted on the vehicle, the control device 71 outputs an operation signal to the inflator 8, and the inflator 8 supplies the inflation gas from the gas discharge port 8b. The air bag 37 is discharged and inflated with the inflating gas flowing inside, and the doors 30 and 30 of the pad 26 are opened on both the front and rear sides, projecting toward the driver MD side, and the inflation is completed. .

  In the airbag apparatus M according to the embodiment, the control device 71 to which signals from the predetermined sensors 72, 73, and 74 are input, for example, the driver MD1 (MD) is small, or the steering wheel W When it is detected that the user is seated at a close position, the connection state of the flap member 50 to the opening / closing control device (locking member) 23 is released in advance before the airbag 37 is deployed and inflated. That is, the airbag 25 is inflated in a state where the actuator 25 is operated so as to retract the locking pin 24 and the locking state between the loop portion 59 and the locking pin 24 is released. In this case, as shown in FIG. 12B, the airbag 37 completes the expansion by opening the discharge hole 42 and discharging the excess inflation gas G from the discharge hole 42. Conversely, if the control device 71 detects that the driver MD2 (MD) is large or seated at a position away from the steering wheel W, for example, the airbag 37 is The actuator 25 is not operated and the loop portion 59 is locked to the locking pin 24 so as to maintain the connection state to the 50 opening / closing control device (locking member) 23, so that the expansion is performed. In this case, as shown in FIG. 12A, the airbag 37 completes the expansion while the closed state of the discharge hole 42 is maintained.

  And in the airbag apparatus M of embodiment, it forms so that the hinge part 53a of each pressing piece 55A * 55B * 55C * 55D radially arrange | positioned centering on the discharge hole 42 may surround the discharge hole 42 perimeter. In addition, since the presser pieces 55A, 55B, 55C, and 55D overlap each other and block the discharge hole 42, the outer peripheral side presser piece 55A is connected to the locking member 23 by the belt portion 58. When the airbag 37 is deployed and inflated in a state where the air pressure is maintained, the discharge hole 42 can be closed without any gap by the plurality of presser pieces 55A, 55B, 55C, and 55D, and the gas from the discharge hole 42 can be closed. Leakage can be suppressed as much as possible. In the airbag apparatus M of the embodiment, the plurality of presser pieces 55A, 55B, 55C, and 55D are arranged on the outer peripheral side of the airbag 37, and only the outer peripheral side presser piece 55A uses the belt portion 58. Thus, since the engagement state between the belt portion 58 and the engagement member 23 is released, the engagement member 23 of the outer circumferential side pressing piece 55A is released. When the airbag 37 is deployed and inflated in a state where the connection with the airbag 37 is released, the four presser pieces 55A, 55B, 55C and 55D are pressed by the inflation gas G flowing into the airbag 37, respectively. Then, the hinge part 53a is opened as a center, and the discharge hole 42 is opened. That is, in the airbag apparatus M of the embodiment, when the locked state of the belt portion 58 by the locking member 23 is released, the presser pieces 55A, 55B, 55C, and 55D are pressed against the inflation gas G and are naturally Therefore, the discharge hole 42 can be stably opened. At this time, the presser pieces 55A, 55B, 55C, and 55D are arranged so that the hinge portions 53a are linear and shifted from each other, so that they can be opened smoothly when opened. Thus, the discharge hole 42 can be opened stably.

  Therefore, in the airbag apparatus M of the embodiment, it is possible to stably secure the opening / closing of the discharge hole 42.

  Furthermore, in the airbag apparatus M of the embodiment, the three inner circumferential side holding pieces 55B, 55C, and 55D are partially left and right left side portions 55Bb, 55Cb, 55Db, and right side portions when the discharge hole 42 is closed. 55Ba, 55Ca, 55Da are arranged so as to overlap each other so as to be exchanged in the inner and outer circumferential directions, so that the outer circumferential side holding piece 55A is maintained in the connected state with the locking member 23 using the belt portion 58. In the state, even if the inflation gas flows into the airbag 37 and the inner circumferential side presser pieces 55B, 55C, and 55D are pressed by the inflation gas, the inner and outer sides of the inner circumferential side presser pieces 55B, 55C, and 55D are exchanged. In this way, frictional forces are generated on the surfaces of the left side portions 55Bb, 55Cb, 55Db and the right side portions 55Ba, 55Ca, 55Da, which are overlapped with each other. And thus not be easily released. Therefore, when the airbag 37 is deployed and inflated while the outer circumferential side presser piece 55A is kept connected to the locking member 23 using the belt portion 58, the inner peripheral side presser piece 55B, 55C, 55D. Can be prevented from moving so as to be lifted from the discharge hole by being pressed by the expansion gas, and leakage of the expansion gas from the discharge hole 42 can be further suppressed. Each inner circumferential side presser piece 55B / 55C / 55D is composed of a woven cloth having flexibility, and is engaged with each other by a slit 56 formed in the woven cloth. When the airbag 37 is deployed and inflated while the side presser piece 55A is disconnected from the open / close control device 23, the overlapping state of the inner peripheral side presser pieces 55B, 55C, and 55D is the inflating state. It can be easily released by the gas pressing force, and the discharge hole 42 can be opened without hindrance.

  Furthermore, in the airbag apparatus M of the embodiment, the locking member 23 as an opening / closing control apparatus is disposed on the bag holder 12 side away from the discharge hole 42. That is, in the airbag apparatus M of the embodiment, the discharge hole 42 is disposed on the downstream side of the inflation gas away from the inflow opening 40 of the airbag 37, so that the inflation completed shape of the airbag 37 can be quickly formed. It is easy to suppress the internal pressure in the secured state. In the airbag device of the embodiment, the outer circumferential side holding piece 55A is pressed by the belt portion 58 that is locked to the locking member 23 on the front end 58b side. It is the structure arrange | positioned so that it may penetrate to 43 A of penetration holes formed in the periphery of the vicinity. That is, in the airbag apparatus M of the embodiment, the belt portion 58 disposed on the outer circumferential side of the airbag 37 on the outer circumferential side pressing piece 55A side is penetrated by the insertion hole 43A disposed on the peripheral edge in the vicinity of the discharge hole 42. Thus, the air bag 37 is disposed on the inner peripheral side. Therefore, when the airbag 37 is deployed and inflated while the belt portion 58 is kept connected to the locking member 23, a portion 58 c of the belt portion 58 located on the inner circumferential side of the airbag 58 is Since the inflating gas flowing into the air bag 37 is pressed against the peripheral wall (vehicle body side wall 39) constituting the airbag 37, the belt portion 58 may sag so as to be largely separated from the vehicle body side wall 39. Absent. Therefore, in the airbag apparatus M of the embodiment, even when the airbag is inflated in a state in which the belt portion 58 is maintained in the connection state with the locking member 23, the outer circumferential side holding piece 55 </ b> A is attached to the end portion of the belt portion 58. The peripheral edge of the discharge hole 42 can be accurately pressed by 58a, and gas leakage from the discharge hole 42 can be suppressed.

  In addition, when the airbag 37 is deployed and inflated in a state where the engagement state with the engagement member 23 is released, the belt portion 58 is inserted through the loop portion 59 with the opening of the outer circumferential side holding piece 55A. The loop portion 59 is pulled out from the insertion hole 43 </ b> B without causing any trouble in the inflation of the airbag 37.

  In the airbag apparatus M of the embodiment, the main body cloth 51 of the flap member 50 is configured to include four presser pieces 55A, 55B, 55C, and 55D, but the number of presser pieces is limited to this. Instead, for example, a structure including three pressing pieces 55A ′, 55B ′, and 55C ′ may be used like the main body cloth 51 ′ in the flap member 50 ′ shown in FIG. The main body cloth 51 ′ shown in FIG. 13A has a substantially equilateral triangular shape in which the coupling piece 52 ′ located at the center is positioned on the front side, and the holding pieces 55A ′, 55B ′, and 55C ′ are It is formed to extend to the front side and the left and right sides. A circular through hole 52 a ′ corresponding to the discharge hole 42 is formed in the vicinity of the center of the coupling piece 52 ′, similarly to the main body cloth 51 described above. The coupling piece 52 ′ is sewn to the vehicle body side wall 39 over the entire periphery in the vicinity of the periphery, and a linear shape of a substantially equilateral triangular coupling part 53 ′ surrounding the entire circumference around the through hole 52 a ′. Each side 53a ′ constitutes a hinge portion of each presser piece 55A ′ / 55B ′ / 55C ′. Of course, the length of each side (hinge part) 53 a ′ in the coupling part 53 ′ is also larger than the diameter of the discharge hole 42.

  In the main body cloth 51 ′ shown in FIG. 13A, the presser piece 55A ′ disposed on the front side among the presser pieces 55A ′, 55B ′, and 55C ′ covers the other presser pieces 55B ′ and 55C ′. A substantially rectangular shape that can be formed is used as an outer circumferential side pressing piece. A belt portion 58 is sewn on the outer circumferential side presser piece 55A ′ in the same manner as the outer peripheral side presser piece 55A. The presser pieces 55B 'and 55C' disposed on the left and right sides are the inner peripheral side presser pieces, and each has a triangular shape having substantially the same outer shape as the coupling piece 52 '. A slit 56 ′ is disposed near the center in the left-right direction on the rear edge side of each inner circumferential holding piece 55 B ′ / 55 C ′.

  Also in the main body cloth 51 ′, as shown in FIG. 13B, first, the inner circumferential side holding piece 55B ′ is folded back so as to cover the discharge hole 42 in the vicinity of the hinge part 53a ′. Next, as shown in FIG. 14A, the inner circumferential side holding piece 55C ′ is folded back in the vicinity of the hinge part 53a ′, and the inner circumferential side holding piece 55C is used by utilizing the slits 56 ′ of the respective holding pieces 55B ′ and 55C ′. ′ Right portion 55Ca ′ is positioned outside the left side portion 55Bb ′ of the inner circumferential side pressing piece 55B ′, and the left side portion 55Cb ′ of the inner circumferential side pressing piece 55C ′ is positioned on the right side portion 55Ba ′ of the inner circumferential side pressing piece 55B ′. The inner circumferential side presser pieces 55B ′ and 55C ′ are overlapped so as to be positioned inside. After that, as shown in FIG. 14B, the outer circumferential side holding piece 55A ′ is folded back in the vicinity of the hinge portion 53a ′ so as to close the discharge hole 42, and the belt portion 58 is passed through the insertion hole 43A. The discharge hole 42 can be closed by '. Even when such a main body cloth 51 ′ is used, each presser piece 55 ′ is arranged radially around the discharge hole 42, and the hinge part 53 a ′ of each presser piece 55 ′ is the periphery of the discharge hole 42. Therefore, the exhaust hole 42 can be closed without a gap when closed, and gas leakage from the exhaust hole 42 can be suppressed as much as possible.

  Note that the number of presser pieces 55 (55A, 55B, 55C, 55D), 55 '(55A', 55B ', 55C') is not limited to the above, and includes a linear hinge portion, As long as the discharge hole can be closed, and the periphery of the discharge hole can be surrounded by the hinge part over the entire circumference, five or more sheets may be provided. Further, in the embodiment, the flap members 50 and 50 'are constituted by the main body cloths 51 and 51' in which the presser pieces 55 and 55 'are integrally formed via the coupling pieces 52 and 52'. Of course, the shape of the flap material is not limited to this, and as the flap material, one having a structure in which each pressing piece is separated and coupled to the vehicle body side wall 39 may be used. Note that, as in the embodiment, when the flap piece is provided with a coupling piece and the presser piece is disposed via the coupling piece, each presser foot is sewn by sewing the periphery of the through hole in the coupling piece over the entire circumference. The piece can be connected to the side wall of the vehicle body, and compared with the case where the presser piece is sewn separately to the side wall of the vehicle body, the number of sewing operations can be reduced and the number of manufacturing steps of the airbag can be reduced. This is preferable.

  Moreover, you may use the thing of the structure shown in FIG. 15 as the airbag 37A. The airbag 37A has the above-described airbag except that the shape of the discharge hole 42A, the stopper piece 77 as a flap member, and the insertion hole 43 through which the belt portion 58A is inserted are disposed only in the vicinity of the discharge hole 42A. The same components as those in FIG. 37 are denoted by “A” at the end of the reference numerals, and description thereof is omitted. In the airbag 37A, the discharge hole 42A is configured to open in a substantially square shape.

  As shown in FIGS. 16 and 17, the stopper piece 77 is disposed on the inner peripheral side of the bag main body 38 </ b> A and can close the discharge hole 42 </ b> A, and the belt portion 58 </ b> A connected to the main body cloth portion 78. And is composed of. The belt portion 58A has the same configuration as the belt portion 58 in the above-described airbag 37, and the same members are denoted by “A” at the end of the reference numerals, and description thereof is omitted.

  The main body cloth portion 78 is formed of a flexible woven cloth made of polyamide yarn, polyester yarn or the like, as with the bag main body 38A, and is arranged on the inner peripheral side as shown in FIGS. The connecting piece portion 79 is provided, and the main body portion 85 is disposed between the connecting piece portion 79 and the vehicle body side wall portion 39A so as to block the discharge hole 42A.

  As shown in FIGS. 16, 18, and 19, the coupling piece portion 79 is formed in a rectangular shape with the short direction extending substantially in the front-rear direction. A substantially U-shaped slit 79a that is continuously formed is provided, and an inner portion of the slit 79a is an auxiliary piece portion 80 that is coupled to the main body portion 85 side together with the belt portion 58A, and a portion outside the slit 79a. Is configured as a coupling frame portion 81 coupled to the vehicle body side wall portion 39A side. The auxiliary piece 80 can be opened together with the main body 85 when the discharge hole 42A is opened. The front end 80a side of the main body 85 near the hinge portion 82a described later is used as a hinge portion when opening. The vicinity of the end portion 58a is reinforced by sewing the end portion 58a side of the belt portion 58A to the inner peripheral surface side. In the case of the embodiment, the auxiliary piece 80 is formed at a position corresponding to the discharge hole 42A, with the outer shape being set substantially the same as that of the discharge hole 42A.

  The coupling frame portion 81 is joined to the vehicle body side wall portion 39 </ b> A by sewing the front edge side excluding the rear edge side and the left and right edge sides over the entire circumference. In the case of the embodiment, the main body 85 is joined together with the coupling frame portion 81 and the vehicle body side wall portion 39A at the front end side portion 82a of the coupling portion 82, and the front end side portion 82a The hinge part of the main-body part 85 will be comprised.

  The rear edge side portion of the coupling frame portion 81 constitutes the presser frame member 83. That is, the presser frame member 83 has a configuration in which the vicinity of both left and right edges in the direction orthogonal to the belt portion 58A is coupled to the vehicle body side wall portion 39A by the coupling portion 82. In the vicinity of the center in the left-right direction on the rear edge side of the presser frame member 83, a recess 83a that is cut out in a substantially rectangular shape so that the belt portion 58A can be inserted is formed.

  In the case of the embodiment, the main body portion 85 is formed in a rectangular plate shape whose longitudinal direction is substantially along the front-rear direction, and the front edge 85 a side is coupled to the coupling frame portion 81 by the coupling portion 82 formed in the coupling frame portion 81. The front end side portion 82a of the coupling portion 82 that is sewn to the vehicle body side wall portion 39A together with 92 and is located in the vicinity of the front edge 85a is configured as a hinge portion. The main body 85 has a size capable of preventing gas leakage when the discharge hole 42A is closed, and can protrude out of the airbag 37A by inserting the discharge hole 42A from the hinge portion 82a when the discharge hole 42A is opened. The size is set. Specifically, the main body 85 has a width dimension T1 in the left-right direction larger than a width dimension T2 in the left-right direction of the auxiliary piece 80 (discharge hole 42A), and a width dimension in the left-right direction of the coupling part 82. It is set to be smaller than T3 (see A in FIG. 19). Further, as shown in FIG. 19A, the main body 85 has a length in the front-rear direction so that the rear edge side away from the hinge part 82a can protrude rearward from the presser frame member 83 in a flatly deployed state. The length L1 is set larger than the length dimension L2 in the front-rear direction of the coupling frame portion 81 (see A in FIG. 19). That is, the main body 85 is configured such that only the front edge 85a side is coupled to the vehicle body side wall 39A while being disposed between the coupling piece portion 79 and the vehicle body side wall 39A. Further, the main body 85 is sewn on the belt portion 58A sewn on the end portion 58a side together with the auxiliary piece portion 80 at a position that overlaps the presser frame member 83 on the tip side away from the hinge portion 82a. I am letting.

  The main body 85 is flat when unfolded with the tip edge 86 protruding rearward from the presser frame member 83 as shown in FIG. As shown in FIG. 5, the belt portion 58A is folded back at a position near the rear edge of the presser frame member 83 and placed on the inner peripheral side of the presser frame member 83, and further, the belt portion 58A is attached to the inner peripheral side of the folded tip edge portion 86. It will be arranged so that it may be placed. In the case of the embodiment, the front end edge 86 has a width dimension T3 in the front-rear direction set to be substantially the same as a width dimension T4 in the front-rear direction of the recess 83a formed in the presser frame member 83 (see A in FIG. 19). ), The front end edge portion 86 is pressed on the inner peripheral side by the belt portion 58A protruding from the concave portion 58A. That is, the main body portion 85 is folded back and closes the portion on the rear edge side of the discharge hole 42A by the leading edge portion 86 sandwiched between the presser frame member 83 and the belt portion 58A. The belt portion 58A is a peripheral edge of the discharge hole 42A and penetrates through an insertion hole 43A formed on the rear side of the presser frame member 83. As shown in FIG. 15, the front end 58b side (loop portion 59A side) Is disposed on the outer peripheral side of the airbag 37A.

  Also in the airbag main body 37A, the loop portion 59A formed on the end 58b side of the belt portion 58A is configured to be locked to the locking member 23 formed on the bottom wall portion 13 of the bag holder 11, and the belt The length of the portion 58A is set to a size that allows the airbag 37A to complete expansion without hindrance with the loop portion 59A maintained in a locked state with the locking pin 24 of the locking member 23. ing. When the airbag 37A is deployed and inflated with the loop portion 59A being disconnected from the locking member 23, the main body 85 is pushed by the inflation gas flowing into the airbag 37A, With the hinge part 82a as the center of rotation, it opens through the discharge hole 42A so as to protrude out of the airbag 37A. At this time, the belt portion 58A causes the portion 58d located near the main body portion 85 to protrude out of the airbag 37A as the main body portion 85 moves.

  As shown in FIG. 18, the main body cloth portion 78 of the embodiment has a substantially outer shape such that the coupling piece portion 79 and the main body portion 85 are connected to each other on the front edge side so that the center in the left-right direction coincides. It is comprised from the base fabric part 88 for main body cloth parts made into the convex shape. And air bag 37A provided with stop piece 77 of an embodiment can be manufactured as follows. Specifically, the base cloth 88 for the main body cloth part in which the slits 79a are formed in advance in the part of the connecting piece part 79 is arranged in the left-right direction at the part on the front edge side of the connecting piece part 79 and the main body part 85. Folded along the crease C1 (see FIG. 18) along, the vicinity of the end portion 58a of the belt portion 58A is sewn to the auxiliary piece portion 80 and the main body portion 85. Thereafter, the base cloth 88 for the main body cloth part is arranged on the inner surface side of the vehicle body side wall part 38A so that the connecting piece part 79 is located on the inner peripheral side, and is attached to the car body side wall part 38A at the part of the connecting part 82. Sewing is performed (see A in FIG. 19). Then, the front edge portion 86 protruding rearward from the presser frame member 83 is folded back at a position near the rear edge of the presser frame member 83, and as shown in FIG. It is placed on the inner peripheral side of the presser frame member 83 so as to be sandwiched between the belt portion 58A and the belt portion 58A passes through the insertion hole 43A formed in the vehicle body side wall portion 39A. Thereafter, the airbag 37A can be manufactured by sewing a predetermined portion in the same manner as the bag body 38 described above.

  In the airbag device using the airbag 37A having the above-described configuration, the main body 85 of the stopper piece 77 as a flap member is disposed on the inner peripheral side of the airbag 37A, and gas leakage can be prevented when the discharge hole 42A is closed. Is set to a large size. That is, in the airbag device using the airbag 37A having the above-described configuration, when the airbag 37A is deployed and inflated in a state in which the stopper piece 77 is maintained in the connected state to the locking member 23 as the opening / closing control device, The main body portion 85 can block the discharge hole 42A without any gaps, and can also prevent gas leakage from the discharge hole 42A. In the airbag device having the above-described configuration, the main body portion 85 of the stopper piece 77 and the locking member 23 are disposed apart from each other, but the belt portion 58A disposed on the distal end side of the main body portion 85. However, it is the structure arrange | positioned so that it may penetrate to the penetration hole 43A arrange | positioned at the periphery of the vicinity of the discharge hole 42A. That is, the belt portion 58A disposed on the inner peripheral side of the airbag 37A on the main body 85 side is penetrated at the peripheral edge in the vicinity of the discharge hole 42A and is disposed on the outer peripheral side of the airbag 37A. Therefore, the belt portion 58A in a state where the connection state with the locking member 23 is maintained can be pressed by the peripheral wall 39A constituting the airbag 37A at the periphery in the vicinity of the discharge hole 42A. In other words, the belt portion 58A is located closer to the end portion 58b than the insertion hole 43A, and the portion 58d located on the outer peripheral side of the airbag 37A is pressed by the vehicle body side wall portion 39A. As a result, even when the airbag 37A is inflated while the belt portion 58A is kept connected to the locking member 23, the belt portion 58A can be prevented from moving up from the discharge hole 42A. Thus, the main body portion 85 can accurately close the discharge hole 42A, and gas leakage from the discharge hole 42A can be suppressed.

  Further, in the airbag 37A having the above-described configuration, the main body 85 of the stopper piece 77 is set to a size that allows the discharge hole 42A to pass through the discharge hole 42A and protrude out of the airbag 37A when the discharge hole 42A is opened. Has been. Therefore, when the airbag 37A is deployed and inflated in a state where the connection state with the locking member 23 is released, the main body 85 is pressed by the inflation gas G flowing into the airbag 37A. As shown in FIG. 20, the hinge part 82a is opened so as to protrude from the discharge hole 42A to the outside of the airbag 37A, and the discharge hole 42A is opened. Further, at this time, the belt portion 58A moves so that the portion 58d in the vicinity of the main body portion 85 is projected together with the main body portion 85 to the outside of the airbag 37A, and the main body portion 85 protrudes out of the airbag 37A without any trouble. Can be made. That is, even when the airbag 37A having the above-described configuration is used, if the connection state with the locking member 23 is released, the main body portion 85 is naturally pressed by the inflation gas, and thus the discharge hole 42A is opened. It can be opened stably.

  Therefore, even in the airbag apparatus using the airbag 37A having the above-described configuration, the opening / closing of the discharge hole 42A can be stably secured.

  In the airbag 37 </ b> A having the above-described configuration, the stopper piece 77 is blocked by the distal end edge portion 86 that is folded back so as to be placed on the inner peripheral side of the presser frame member 83. In this state, the airbag 37A is stored. The folded leading edge 86 is sandwiched between the belt portion 58A and the presser frame member 83. Therefore, the airbag 37A is maintained in the state of being connected to the locking member 23. When the belt expands and expands, it is pressed by the belt portion 58A, and the folded state of the tip edge portion 86 is maintained. Therefore, when the airbag 37A is deployed and inflated while being connected to the locking member 23, both side edges (both left and right edges) 85b extending from the leading edge 86 to the hinge part 82a side of the main body 85 are provided. 85c (see FIGS. 18 and 19B) is prevented from being partially turned up to the discharge hole 42A side, so that the discharge hole 42A can be blocked with a stable sheet shape, and gas leakage from the discharge hole 42A is further suppressed. Is possible.

  If such a point is not taken into consideration, the stopper piece 90 including the main body cloth portion 91 having the configuration shown in FIGS. 21 and 22 may be used. As shown in FIG. 21B, the main body cloth portion 91 is formed from a substantially rectangular main body cloth portion base cloth 99 including a connecting piece portion 92 and a main body portion side portion 95 having substantially the same shape as the connecting piece portion 92. 21. As shown in A and 22 of FIG. 21, the coupling piece portion 92 is disposed on the inner peripheral side of the vehicle body side wall portion 39B so as to be positioned on the inner peripheral side of the main body side portion 95. It becomes.

  The coupling piece portion 92 is provided with a substantially U-shaped slit 92a continuously formed on both the left and right sides excluding the front side and the rear end in the vicinity of the center, and the inner portion of the slit 92a is formed on the belt portion 58A. In addition, an auxiliary piece portion 93 connected to the body portion 96 side, which will be described later, is formed, and a portion outside the slit 79a is configured as a coupling frame portion 94 connected to the vehicle body side wall portion 39B side. The auxiliary piece portion 93 is set to have the same outer shape as the discharge hole 42B formed in the vehicle body side wall portion 39B, and is disposed at a position corresponding to the discharge hole 42B.

  The body portion side portion 95 is provided with a substantially U-shaped slit 95a continuously formed on both the left and right sides excluding the front side and the rear end in the vicinity of the center. 96, and the portion outside the slit 95a is configured as a coupling frame portion 97 coupled to the vehicle body side wall portion 39B. The main body 96 is sized to prevent gas leakage when the discharge hole 42B is closed, and can protrude out of the airbag by inserting the discharge hole 42B from a hinge part 98a described later when the discharge hole 42B is opened. Is set to a large size. Specifically, the main body 96 is set so that the width dimension in the front-rear / left-right direction is larger than the width dimension in the front-rear / left-right direction of the auxiliary piece 93 (discharge hole 42B). The belt portion 58A is sewn to the auxiliary piece portion 93 and the main body portion 96 on the end portion 58a side, and is sewn to the main body portion 96 at an intermediate portion away from the end portion 58a, similarly to the main body cloth portion 78 described above. Will be worn.

  And in the main body cloth part 91 of embodiment, the base cloth 99 for main body cloth parts is formed into the crease | fold C2 (refer B of FIG. 21) formed in the site | part used as the front edge side of the coupling piece part 92 and the main body part side part 92. ), And the joint frame portions 92 and 97 are overlapped on the inside and outside, and the periphery of the joint frame portions 92 and 97 is other than the gap 98b for inserting the belt portion 58A disposed on the rear end side. The part is sewn to the vehicle body side wall 39 </ b> B over the entire periphery, and the part 98 a on the front end side in the joint part 98 constitutes the hinge part of the main body part 96.

  In the stopper piece 90 provided with the main body cloth portion 91 having such a configuration, the distal end side away from the hinge portion 98a in the main body portion 96 is not folded back, and this portion is not blocked, but the main body portion 96 is discharged. Since the size is set such that gas leakage can be prevented when the hole 42B is closed, even when the airbag is deployed and inflated while the belt portion 58A is locked to the locking member 23, it is discharged by the main body portion 96. The hole 42B can be properly closed, and gas leakage from the discharge hole 42B can be suppressed. Of course, when the airbag is deployed and inflated with the belt portion 58A unlocked from the locking member 23, the main body portion 96 is pushed by the inflation gas flowing into the airbag, With the hinge part 98a as the rotation center, the exhaust hole 42B is inserted so as to protrude out of the airbag, and the discharge hole 42B is smoothly opened.

  Further, the discharge piece 42 </ b> C formed in the vehicle body side wall 39 </ b> C may have a substantially right triangle shape, and the stopper piece 101 including the main body cloth portion 102 configured as shown in FIGS. 23 and 24 may be used. As shown in FIG. 23A, the discharge hole 42C is formed so that the hypotenuse side is positioned forward along the left-right direction. As shown in FIG. 23B, the main body cloth portion 102 is formed from a substantially quadrangular main body cloth portion base fabric 109 in which a substantially right triangle-shaped connecting piece portion 103 and a main body portion 107 are connected on the hypotenuse side. 23. As shown in A / 24 of FIG. 23, the coupling piece 103 is disposed so as to be positioned on the inner peripheral side of the main body fabric 102.

  The coupling piece 103 has a substantially right triangular plate shape and is disposed so that the hypotenuse side is positioned forward along the left-right direction. The coupling piece 103 includes a substantially L-shaped slit 103a that is continuously formed except for the front side, and the inner part of the slit 103a is connected to the main body 96 side described later together with the belt 58A. The auxiliary piece portion 104 has a shape corresponding to the discharge hole 42C, and the portion outside the slit 103a is configured as a coupling frame portion 105 coupled to the vehicle body side wall portion 39C. The coupling frame portion 105 is joined by being sewn to the vehicle body side wall portion 39C over the entire periphery except for a part on the rear end side. The main body 107 is joined to the body side wall portion 39C together with the joint frame portion 105 at the front end side portion 106a of the joint portion 106, and the front end side portion 106a is joined to the main body portion 107. This constitutes the hinge part.

  The main body 107 has a substantially right triangle shape with the hypotenuse (hinge portion 106a) positioned on the front end side, and has a size capable of preventing gas leakage when the discharge hole 42C is closed, and the opening of the discharge hole 42C. In some cases, the size is set such that the discharge hole 42C can be inserted from the hinge portion 106a to protrude outside the airbag. Further, the main body portion 107 is formed with a main body cloth portion base fabric 109 at a portion on the front edge side of the connecting piece portion 103 and the main body portion 107 so that only the front edge side is sewn together with the connecting frame portion 105. When folded at the crease C3 (see B in FIG. 23), the periphery excluding the front edge side is positioned on the inner side of the coupling site 106. The belt portion 58A is sewn to the auxiliary piece portion 103 and the main body portion 107 on the end portion 58a side in the same manner as the main body cloth portions 78 and 91 described above, and the main body portion 107 at an intermediate portion away from the end portion 58a. Will be sewn.

  Even in the stopper piece 101 provided with the main body cloth portion 102 having such a configuration, the distal end side away from the hinge portion 106a in the main body portion 107 is not folded back, and this portion is not blocked. In addition, since the main body 107 is set to a size capable of preventing gas leakage when the discharge hole 42C is closed, the airbag is deployed and inflated while the belt 58A is locked to the locking member 23. In addition, the discharge hole 42C can be accurately closed by the main body 107, and gas leakage from the discharge hole 42C can be suppressed. Of course, when the airbag portion is deployed and inflated with the belt portion 58A released from the locking state with the locking member 23, the main body portion 107 is pushed by the inflation gas flowing into the airbag, With the hinge part 106a as the center of rotation, the exhaust hole 42C is inserted so as to project out of the airbag, and the exhaust hole 42C is smoothly opened.

  In the main body cloth part 78, 91, 102 of the embodiment, the belt part 58A is connected to the main body part 85, 96, 107 to the coupling piece part 79, 92, 103, and the vicinity of the end part 58a of the belt part 58A. Auxiliary piece portions 80, 93, and 104 that increase the connection strength are formed, but the auxiliary piece portions 80, 93, and 104 are not disposed, and the coupling piece portion is formed so as to cut out this portion, and the main body The belt portion 58A may be connected to only the portions 85, 96, and 107.

  Further, in the airbag 37 of the embodiment, the inflation gas is discharged only from the discharge hole 42. However, as in the case of a normal steering wheel airbag device, an abrupt inflow of the inflation gas is separately performed. In order to prevent damage due to the above, it may be configured to provide a vent hole capable of discharging the inflation gas configured to always open.

  Furthermore, in the embodiment, the airbag device for the steering wheel is described as an example of the airbag device, but the airbag device to which the present invention can be applied is not limited to this, for example, the passenger seat The present invention can also be applied to an airbag apparatus for use.

It is the schematic which shows the steering wheel vicinity of the vehicle carrying the airbag apparatus for steering wheels which is one Embodiment of this invention. It is a top view of the steering wheel in which the airbag apparatus of the embodiment is used. It is a schematic sectional drawing of the steering wheel of the embodiment, and respond | corresponds to the III-III site | part of FIG. It is a schematic sectional drawing of the steering wheel of the embodiment, and respond | corresponds to the IV-IV site | part of FIG. FIG. 5 is a partially enlarged schematic cross-sectional view showing the vicinity of the portion of the locking member in the airbag device of the embodiment, corresponding to the VV portion of FIG. 3. It is a bottom view of the airbag used for the airbag apparatus of the embodiment. It is a general | schematic disassembled perspective view which shows the structural member at the time of manufacture of the airbag of the embodiment. It is a schematic sectional drawing of the airbag of the embodiment. It is an expanded view of the flap material used for the airbag of the embodiment. In the airbag of the embodiment, it is the schematic perspective view seen from the airbag outer peripheral side which shows the process of obstruct | occluding a discharge hole with a flap material. FIG. 11 is a schematic perspective view showing a step of closing the discharge hole with a flap material in the airbag of the embodiment, and shows a step subsequent to FIG. 10. It is a schematic sectional drawing which shows the expansion completion state of the airbag of the embodiment. It is the schematic seen from the airbag outer peripheral side which shows the process of obstruct | occluding a discharge hole with this flap material while showing the modification of flap material. It is the schematic which shows the process of obstruct | occluding a discharge hole with the flap material of FIG. 13, and shows the process after FIG. It is a bottom view which shows the airbag of other embodiment. It is the schematic perspective view seen from the airbag inner peripheral side which shows the site | part of the stop piece in the airbag of FIG. FIG. 17 is a schematic cross-sectional view of a stop piece portion in the airbag of FIG. 15, corresponding to the XVII-XVII portion of FIG. 16. It is an expanded view of the main-body cloth part which comprises the stop piece used for the airbag of FIG. It is a top view of the site | part of the stop piece in the airbag of FIG. 15, and is a figure which shows the state before the return | turnback of a front-end | tip edge part, and after a return | turnback. In the airbag of FIG. 15, it is the elements on larger scale which show the state which the latching member was cancelled | released and the discharge hole was opened. It is a figure which shows the stop piece of another form, and is a top view of the site | part of a stop piece, and the expanded view of the base fabric for main body cloth parts in a stop piece. It is a schematic exploded perspective view of the part of the stop piece in the airbag using the stop piece of FIG. Furthermore, it is a figure which shows the stop piece of another form, and is a top view of the site | part of a stop piece, and the expanded view of the base fabric for main body cloth parts in a stop piece. FIG. 24 is a schematic exploded perspective view of a portion of a stopper piece in an airbag using the stopper piece of FIG. 23.

Explanation of symbols

8 ... Inflator,
23 ... locking member (opening / closing control device),
24 ... locking pin,
25 ... Actuator,
37 ・ 37A… Airbag,
39, 39A, 39B, 39C ... the side wall of the vehicle body,
40: Inflow opening,
42, 42A, 42B, 42C ... discharge hole,
43A, 43B ... insertion hole,
45 ... occupant side wall,
50, 77, 90, 101 ... flap material (stop piece),
53, 82, 98, 106 ... binding sites,
53a, 82a, 98a, 106a ... hinge part,
55 ... Presser foot,
55A: outer periphery side presser piece,
55B / 55C / 55D: Inner circumferential side presser piece,
56 ... Slit,
58.58A ... Belt part,
59, 59A ... Loop part,
85, 96, 107 ... main body,
86 ... the edge of the tip,
W ... Steering wheel,
M: An airbag device for a steering wheel.

Claims (5)

An air bag having a discharge hole that allows the inflation gas to flow in, expands from the folded state when stored, and discharges a portion of the inflation gas that flows when opened to suppress the internal pressure during expansion. When,
A flap material that is coupled to a peripheral edge of the discharge hole of the airbag and allows the discharge hole to be opened or closed;
When maintaining the connected state with the flap material, the flap material maintains the closed state of the discharge hole, and when releasing the connected state with the flap material, the flap material opens the discharge hole, An opening and closing control device connected to the flap material;
An airbag device comprising:
The flap material is coupled to a peripheral edge of the discharge hole on the outer peripheral side of the airbag, and is configured by a plurality of flexible sheet-like press pieces that can close the discharge hole, respectively.
A plurality of the presser pieces are arranged in a substantially linear shape as a hinge part when opening the discharge hole when the discharge part is opened, and surrounds the entire circumference of the discharge hole. It is arranged so as to be shifted and disposed so as to be able to close the discharge hole by overlapping flatly with each other,
The outer peripheral side pressing piece located on the outermost peripheral side when the discharge hole of the pressing piece is closed connects the distal end side of the outer peripheral side pressing piece away from the hinge part to the opening / closing control device. An airbag device characterized by that. At least three or more of the presser pieces are disposed,
At least one of the inner peripheral side pressing pieces disposed on the inner peripheral side of the outer peripheral side pressing piece is from the inner peripheral side of the inner peripheral side pressing piece to the outer peripheral side, or from the outer peripheral side to the inner peripheral side, 2. The slit according to claim 1, further comprising: a slit that allows other inner periphery side presser pieces to be inserted and allows a part of the inner periphery side presser pieces to be interchanged. Airbag device. The opening / closing control device is disposed in the vicinity of the inflow opening for the inflation gas of the airbag;
The discharge hole is disposed at a position away from the inflow opening;
3. The opening / closing control device according to claim 1, wherein a distal end side of the outer circumferential side pressing piece that is away from the hinge portion is connected to the opening / closing control device as a belt portion that penetrates a peripheral edge in the vicinity of the discharge hole. The airbag apparatus as described in. An air bag having a discharge hole that allows the inflation gas to flow in, expands from the folded state when stored, and discharges a portion of the inflation gas that flows when opened to suppress the internal pressure during expansion. When,
A flap material that is coupled to a peripheral edge of the discharge hole of the airbag and allows the discharge hole to be opened or closed;
When maintaining the connected state with the flap material, the flap material maintains the closed state of the discharge hole, and when releasing the connected state with the flap material, the flap material opens the discharge hole, An opening and closing control device connected to the flap material;
An airbag device comprising:
The flap material is composed of a flexible sheet-like stop piece coupled to the periphery of the discharge hole on the inner peripheral side of the airbag,
The stop piece
The connecting portion with the airbag is arranged in a substantially straight line as a hinge portion when the discharge hole is opened, and a main body portion that can close the discharge hole, and a tip side away from the hinge portion. A belt portion that is disposed and penetrates a peripheral edge in the vicinity of the discharge hole and is connected to the opening / closing control device;
The main body is set to a size capable of preventing gas leakage when the discharge hole is closed, and projecting out of the airbag by inserting the discharge hole from the hinge portion when the discharge hole is opened. ,
At least a portion of the belt portion in the vicinity of the main body portion penetrates the periphery of the airbag in the vicinity of the discharge hole so that the discharge hole can be inserted through the discharge hole and project outside the airbag. An airbag device characterized by comprising: The stopper piece is provided on the distal end side away from the hinge part in the main body part, extending to both sides so as to be orthogonal to the belt part, and provided with a distal end edge disposed on the outer peripheral side of the belt part,
Cover the hinge part side of the tip edge part on the inner peripheral side of the main body part on the inner peripheral side of the airbag part, and the vicinity of both edges in the direction orthogonal to the belt part on the inner peripheral side of the airbag part A sheet material having flexibility to be joined, and further, a presser frame material provided with a recess at the periphery thereof that can be inserted in the vicinity of the main body part side in the belt part,
When the airbag is folded and stored, the stopper piece is folded and placed on the inner peripheral side of the presser frame material, and the belt portion is placed on the inner periphery of the folded distal end edge. The airbag device according to claim 4, wherein the airbag is stored on a side.

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