JP5799909B2 - Side airbag device for vehicle - Google Patents

Description

  The present invention relates to a vehicle side airbag device.

  The side airbag device described in the following Patent Document 1 is disposed in the side portion of the seat back, and receives the gas supply from the inflator and inflates and deploys to the front side of the side portion, so that the side airbag device is It has an airbag that restrains the waist. The interior of the airbag is divided into an upper compartment and a lower compartment. An inner tube (rectifying cloth) opened in the upper compartment and the lower compartment is provided inside the airbag, and a diffuser and an inflator are accommodated in the inner tube. Thereby, the gas ejected from the gas ejection port of the inflator is distributed to the upper compartment and the lower compartment from the upper and lower openings of the inner tube.

JP 2010-116133 A

  In the side airbag device as described above, the inner tube and the diffuser are formed in a substantially cylindrical shape extending in the vertical direction. For this reason, the gas ejected from the inflator is ejected vigorously in the vertical direction from the upper and lower openings of the inner tube. Thereby, since the deployment of the airbag to the upper side and the lower side is promoted, the upper and lower portions of the airbag can be quickly interposed between the shoulder and waist of the seated occupant and the side of the vehicle body. However, since there is a possibility that the gas supply to the vertical middle part of the airbag (especially the front end side of the vertical middle part) may be delayed, there is room for improvement in terms of improving the initial restraint performance of the seated passenger's chest. is there.

  In view of the above-described facts, the present invention provides a vehicle side airbag device capable of improving the initial restraint performance of the chest more than before when restraining at least the shoulder, chest and abdomen of the seated occupant with the side airbag. The purpose is that.

According to a first aspect of the present invention, a vehicle side airbag device is provided in a side portion of a seat bag of a vehicle seat, and in an inflator that ejects gas when operated, and the inflator is housed inside A side airbag that is stored in a folded state in the side portion, is inflated and deployed between a seated occupant and a vehicle body side by gas ejected from the inflator, and restrains at least the shoulder, chest, and abdomen of the seated occupant; An upper opening provided in the side airbag for covering the inflator and guiding the gas ejected from the inflator upward and a lower opening for guiding the gas downward, the opening area of the upper opening Is set to be larger than the opening area of the lower opening, so that the gas ejected from the inflator can be opened upward. And a rectifying member that guides toward the front of the vehicle by some, the inside of the side airbag is partitioned into a front chamber and a rear chamber by a partitioning portion, wherein at inflated and deployed state of the side airbag The front chamber and the rear chamber are arranged in the front-rear direction, the inflator and the rectifying member are provided in the rear chamber, and the front chamber and the rear chamber are provided through a vent provided at a position facing the upper opening. And communicated with each other.

In the first aspect of the present invention, the positional relationship between the seated occupant and the side airbag is, for example, an international unified side impact dummy (World SID) seated on a vehicle seat and a side airbag. It is set based on the positional relationship. This also applies to the invention described in claim 3.

  In the invention according to claim 1, the inflator is accommodated in the side airbag stored in the folded state in the side portion of the seat bag. When the inflator is activated, the side airbag is inflated and deployed between the seated occupant and the vehicle body side by the gas ejected from the inflator, and at least the shoulder, chest and abdomen of the seated occupant are restrained by the side airbag.

Here, in this invention, the above-mentioned inflator is covered with the rectification | straightening member provided in the side airbag. The rectifying member has an upper opening for guiding the gas ejected from the inflator to the upper side and a lower opening for guiding the gas to the lower side. The opening area of the upper opening is set larger than the opening area of the lower opening, and the gas ejected from the inflator is guided to the vehicle front side by a part of the upper opening. That is, this rectifying member flows more gas to the upper opening side having a larger opening area and guides a part thereof to the front side of the vehicle. Thereby, not only can the inflation and deployment of the upper and lower portions of the side airbag be promoted, but the inflation and deployment of the intermediate portion in the vertical direction of the side airbag can be facilitated. As a result, it becomes possible to improve the initial restraint performance of the chest of the seated occupant as compared with the prior art.
In addition, in the present invention, since the interior of the side airbag is partitioned into the front chamber and the rear chamber by the partition portion, the internal pressures of the front chamber and the rear chamber can be individually set. Thereby, for example, it becomes possible to restrain the front part and the rear part of the chest of the seated occupant according to the respective resistances. In addition, a vent that communicates the front chamber and the rear chamber is provided at a position facing the upper opening of the rectifying member in the side airbag. Thereby, the gas ejected (guided) from the upper opening of the rectifying member to the front side of the vehicle can be satisfactorily supplied to the front chamber, so that the expansion and deployment of the front chamber can be promoted.

Vehicle side airbag apparatus according to the invention of claim 2, in claim 1, wherein the rectifying member, Ru regulating cloth der that is sewn into a cylindrical shape whose diameter increases as it goes to the upper side.

In the invention according to claim 2, since the straightening cloth sewn in a cylindrical shape is formed so as to increase in diameter toward the upper end side, in the straightening cloth, the opening area of the upper opening is the opening area of the lower opening. Bigger than. Accordingly, it is to Rukoto very simple structure a rectifying member.

A vehicle side airbag device according to a third aspect of the present invention is provided in a side portion of a seat bag of a vehicle seat, and in an inflator that ejects gas by being operated, and the inflator is housed inside A side airbag that is stored in a folded state in the side portion, is inflated and deployed between a seated occupant and a vehicle body side by gas ejected from the inflator, and restrains at least the shoulder, chest, and abdomen of the seated occupant; An upper opening provided in the side airbag for covering the inflator and guiding the gas ejected from the inflator upward and a lower opening for guiding the gas downward, the opening area of the upper opening Is set to be larger than the opening area of the lower opening, so that the gas ejected from the inflator can be opened upward. A rectifying member guided to the front side of the vehicle by a part of the side airbag, and the inside of the side airbag is partitioned into a front chamber and a rear chamber by a partitioning portion, and the side airbag is in an inflated and deployed state. The front chamber and the rear chamber are arranged in the front-rear direction, and the inflator and the rectifying member are provided in the rear chamber, and the rectifying member is sewn in a cylindrical shape whose diameter increases toward the upper end side; Ru regulating cloth der and a branch portion which distal end opening is open to the front chamber with being sewn in a cylindrical shape branching from the main body portion.

In the invention according to claim 3, the inflator is accommodated in the side airbag stored in a folded state in the side portion of the seat bag. When the inflator is activated, the side air bag is inflated to expand into between the seated occupant and the vehicle body side by the gas ejected from the inflator, the shoulder portion of at least the seated occupant, chest and abdomen Ru is restrained by the side airbag.
Here, in this invention, the above-mentioned inflator is covered with the rectification | straightening member provided in the side airbag. The rectifying member has an upper opening for guiding the gas ejected from the inflator to the upper side and a lower opening for guiding the gas to the lower side. The opening area of the upper opening is set larger than the opening area of the lower opening, and the gas ejected from the inflator is guided to the vehicle front side by a part of the upper opening. That is, this rectifying member flows more gas to the upper opening side having a larger opening area and guides a part thereof to the front side of the vehicle. Thereby, not only can the inflation and deployment of the upper and lower portions of the side airbag be promoted, but the inflation and deployment of the intermediate portion in the vertical direction of the side airbag can be facilitated. As a result, it becomes possible to improve the initial restraint performance of the chest of the seated occupant as compared with the prior art.
Moreover, in the present invention, since the main body portion of the straightening cloth sewn in a cylindrical shape is formed so as to increase in diameter toward the upper end side, in the main body portion, the opening area of the upper opening is the opening area of the lower opening. Bigger than. As a result, more gas can flow to the upper opening side of the main body, so that the gas can be supplied to the upper portion of the rear chamber at an early stage to restrain the shoulder of the seated occupant at an early stage. Moreover, in this rectifying cloth, the front end opening of the branching portion branched from the main body portion opens in the front chamber. In other words, since a dedicated branch for supplying gas to the front chamber is provided, the expansion and deployment of the front chamber can be effectively promoted.

Vehicle side airbag apparatus according to the invention of claim 4, in claim 3, wherein the bifurcation, you are reduced in diameter as it goes toward the distal end.

In the invention according to claim 4, since the diameter of the branch portion is reduced toward the tip side, the flow velocity of the gas ejected from the tip opening of the branch portion can be increased. As a result, it is possible to ing to favorably supply gas to the front side of the front chamber.

A vehicle side airbag device according to a fifth aspect of the present invention is the vehicle side airbag device according to any one of the first to fourth aspects, wherein the vehicular side airbag device is covered with the rectifying member, and the gas ejection portion of the inflator is disposed on the vehicle rear side. that having a covered diffuser from both sides in the vehicle width direction.

In the invention according to claim 5, the gas ejection portion of the inflator is covered by the diffuser from both sides in the vehicle width direction and the vehicle rear side. For this reason, the gas ejected from the gas ejection part of the inflator is guided by the diffuser to both the upper and lower sides and the vehicle front side (that is, the side where the rectifying member guides the gas through the upper opening and the lower opening). effect of the guide (rectifying effect) it can Rukoto to improve.

A vehicle side airbag device according to a sixth aspect of the present invention is the vehicle side airbag device according to any one of the first to fifth aspects, wherein the front airbag is in an inflated and deployed state on the upper portion of the rear chamber. A forward extension is provided that extends above the chamber.

In the sixth aspect of the present invention, since the front extension is provided in the upper part of the rear chamber, for example, the upper arm of the seated occupant pushed upward by the expansion of the front chamber is restrained by the front extension. be able to. In addition, since the gas ejected from the inflator is guided to the upper side and the front side of the vehicle by the upper opening of the main body portion of the rectifying cloth, the gas can be satisfactorily supplied to the front extension portion of the rear chamber.

  As described above, in the vehicle side airbag device according to the present invention, when restraining at least the shoulder, chest and abdomen of the seated occupant with the side airbag, the initial restraint performance of the chest can be improved as compared with the conventional case. it can.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a vehicle seat on which a vehicle side airbag device according to a first embodiment of the present invention is mounted, and shows a state in which the side airbag is inflated and deployed. It is an enlarged side view which expands and shows the side airbag. It is an expanded sectional view which shows the cut surface along the F3-F3 line | wire of FIG. It is a perspective view which shows the structure of the inflator of the same side airbag apparatus, a diffuser, and an inner tube. It is a side view which shows the state which the side airbag of the vehicle side airbag apparatus which concerns on 2nd Embodiment of this invention inflate-deployed. It is a side view which shows the state which the side airbag of the side airbag apparatus for vehicles which concerns on 3rd Embodiment of this invention inflate-deployed.

<First Embodiment>
A vehicle side airbag device 10 according to a first embodiment of the present invention will be described with reference to FIGS. This first embodiment is a reference example. In addition, an arrow FR, an arrow UP, and an arrow OUT that are appropriately described in the drawings respectively indicate the front direction (traveling direction), the upward direction, and the outside in the vehicle width direction of the vehicle. Hereinafter, when the description is made simply using the front-rear direction and the up-down direction, the front-rear direction of the vehicle and the up-down direction of the vehicle are indicated unless otherwise specified.

(Constitution)
As shown in FIG. 1, the side airbag device 10 according to the first embodiment is mounted on a door side side portion 14 </ b> A (a side portion on the side door side not shown) of the seat back 14 in the vehicle seat 12. Yes. The seat back 14 is connected to the rear end portion of the seat cushion 16 so as to be tiltable, and a headrest 18 is connected to the upper end portion.

  In the present embodiment, the front-rear direction, the left-right direction (width direction), and the up-down direction of the vehicle seat 12 coincide with the front-rear direction, left-right direction (width direction), and up-down direction of the vehicle. In FIG. 1, an international unified side impact dummy (WorldSID) P is seated on the vehicle seat 12 instead of an actual occupant. The seating posture of this international unified side crash dummy P is determined by the side crash test method currently used in Japan and Europe (ECE R95) or the side crash test method adopted in the United States (FMVSS214). It is. The inclination angle (reclining angle) of the seat back 14 with respect to the seat cushion 16 is set at a reference setting position corresponding to the seating posture. Hereinafter, the international unified side collision dummy P is referred to as “seat occupant P” for convenience of explanation.

  The side airbag device 10 is rectified by a side airbag 20, an inflator (gas generating means) 22 that ejects gas in the side airbag 20, a diffuser 24 that rectifies the gas from the inflator 22, and the diffuser 24. The inner tube (rectifying cloth) 26 that guides the gas to the upper side, the lower side, and the vehicle front side is configured as a main part.

  The side airbag 20 is disposed (stored) inside the door side portion 14A in a state of being folded and unitized together with the inflator 22 and the like. It expands and deploys between the side door (vehicle body side) (the state shown in FIG. 1). At the time of the inflation and deployment, the seat back pad and the seat skin (both not shown) disposed on the door side portion 14A are configured to be broken by receiving the inflation pressure of the side airbag 20. . Note that the front and rear and upper and lower directions of the side airbag 20 described in the following description indicate directions in a state in which the side airbag 20 is inflated and deployed unless otherwise specified. It almost coincides with the direction.

  As shown in FIGS. 2 and 3, the side airbag 20 is a so-called single chamber side airbag. For example, a single base fabric 28 formed by cutting out a nylon or polyester fabric material is sewn. By doing so, it is formed in a bag shape. The base fabric 28 is folded in two along the polygonal line L, and the one side portion 28A and the other side portion 28B through the polygonal line L are overlapped to form the outer peripheral edge portion as a sewing portion T1 (not shown in FIG. 1). ). Note that the side airbag 20 may be formed by overlapping two base fabrics and sewing the outer peripheral edge portion, and the method of sewing the side airbag 20 is not particularly limited.

  When the side airbag 20 is in an inflated and deployed state, one side portion 28A of the base fabric 28 faces inward in the vehicle width direction (seat occupant P side), and the other side portion 28B of the base fabric 28 extends outward in the vehicle width direction (side door). Side). Further, the side airbag 20 is formed to have a substantially oval shape that is long along the seat bag height direction when the inflated and deployed state is viewed from the side as shown in FIGS. 1 and 2. The shoulder S, the chest C, and the abdomen B of the seated occupant P are formed so as to be constrained.

  Specifically, a shoulder restraint portion 20U that is an upper portion of the side airbag 20 is interposed between the shoulder portion S of the seated occupant P and the side door, and the shoulder portion S is restrained by the shoulder restraint portion 20U. In addition, a chest restraint portion 20M that is an intermediate portion in the vertical direction of the side airbag 20 is interposed between the chest C of the seated occupant P and the side door, and the chest portion C is restrained by the chest restraint portion 20M. Further, an abdominal restraint portion 20L, which is a lower portion of the side airbag 20, is interposed between the abdomen B of the seated occupant P and the side door, and the abdominal portion B is restrained by the abdominal restraint portion 20L.

  On the other hand, the inflator 22 is a so-called cylinder type inflator and is formed in a columnar shape. The inflator 22 is disposed inside the side airbag 20 in a state where the axial direction is along the height direction of the seat back 14, and when the side airbag 20 is inflated and deployed, the rear end portion of the side airbag 20 It is provided so that it may be located in the center part vicinity of the up-down direction.

  A pair of upper and lower stud bolts 30 and 32 (see FIGS. 2 and 3) protrude from the outer peripheral portion of the inflator 22 toward the inner side in the vehicle width direction. These stud bolts 30 and 32 pass through one side portion 28A of the base fabric 28 and the side frame 15A of the seat back frame 15, and a nut 34 is screwed to the tip side. Thereby, the inflator 22 is fastened and fixed to the side frame 15 </ b> A together with the side airbag 20 (so-called side tightening). A configuration in which a stud bolt protruding from the outer peripheral portion of the inflator 22 to the vehicle rear side passes through a bracket or the like fixed to the side frame 15A from the vehicle front side and is screwed to a nut (so-called back tightening) may be adopted. .

  A gas ejection part 22 </ b> A is provided on the upper end side of the inflator 22. A plurality of gas ejection ports 36 arranged in the circumferential direction of the inflator 22 are formed in the gas ejection portion 22A. The gas outlets 36 are arranged at equal intervals over the entire circumference of the inflator 22, and when the inflator 22 is operated, gas is ejected radially from the plurality of gas outlets 36.

  As shown in FIG. 1, a side collision ECU 38 mounted on the vehicle is electrically connected to the inflator 22. A side collision sensor 40 that detects a side collision is electrically connected to the side collision ECU 38. The side collision ECU 38 is configured to operate the inflator 22 when a side collision (inevitable) is detected based on a signal from the side collision sensor 40. When a pre-crash sensor that predicts (predicts) a side collision is electrically connected to the side collision ECU 38, the inflator is used when the side collision ECU 38 predicts a side collision based on a signal from the pre-crash sensor. 22 may be configured to be operated.

  On the other hand, the diffuser 24 is formed, for example, by bending a sheet metal, and is formed in a cross-sectional C shape in which both the upper and lower sides and the vehicle front side are opened as shown in FIG. The diffuser 24 is arranged with the axial direction along the seat bag height direction, and the upper end side of the inflator 22 is inserted inside. As shown in FIG. 3, a stud bolt 30 on the upper side of the inflator 22 passes through one end of the diffuser 24 in the bending direction, and one end of the diffuser 24 in the bending direction is a side frame together with a part of the inflator 22 and the side airbag 20. It is fastened to 15A.

  The diffuser 24 covers the gas ejection portion 22A of the inflator 22 from both sides in the vehicle width direction and the vehicle rear side. For this reason, part of the gas radially ejected from the plurality of gas ejection ports 36 of the gas ejection part 22 </ b> A is ejected directly from the front opening 42 of the diffuser 24 toward the front side of the vehicle, and the remaining gas is discharged from the diffuser 24. After interfering with the inner peripheral surface, the air is ejected from the upper opening 46, the lower opening 48 and the front opening 42 to both the upper and lower sides and the vehicle front side. The cross-sectional shape of the diffuser 24 is not limited to the C-shape, and may be a U-shape, as long as the gas ejection openings are formed on both the upper and lower sides and the vehicle front side (lateral side).

  On the other hand, as shown in FIG. 4, the inner tube 26 is formed by sewing one base cloth 54 formed by cutting out a cloth material similar to the base cloth 28 of the side airbag 20 into a substantially trapezoidal shape. The upper and lower ends are formed in a cylindrical shape. The base fabric 54 is folded in two along the front end edge 26F shown in FIG. 4, and the rear end edge 26R is sewn at a sewing portion T2 (not shown in FIGS. 1 and 2). The inner tube 26 is disposed in the side airbag 20 so as to cover the inflator 22 and the diffuser 24. In the present embodiment, the lower end portion of the inflator 22 protrudes downward from the lower end of the inner tube 26. However, the present invention is not limited to this, and the entire inflator 22 may be covered with the inner tube 26. .

  The inner tube 26 is provided so as to be positioned in the vicinity of the central portion in the vertical direction at the rear portion (rear end side) in the side airbag 20 when the side airbag 20 is inflated and deployed. The inner tube 26 passes through the upper and lower stud bolts 30 and 32 of the inflator 22, and a part of the inner tube 26 is fastened to the side frame 15 </ b> A together with the inflator 22, the diffuser 24 and the side airbag 20. ing.

  The inner tube 26 is normally stored in the door side portion 14A in a state of being folded together with the side airbag 20, and when the inflator 22 is operated, the pressure of the gas ejected from the inflator 22 It expands and expands into a cylindrical shape. The inner tube 26 is formed so as to increase in taper toward the upper end side (in the shape of an inverted truncated cone), and the upper opening (upper end opening) 50 has an opening area of the lower opening (lower end opening) 52. It is set larger than the opening area.

  As shown in FIG. 2, the inner tube 26 has an inverted trapezoidal shape in which the length in the front-rear direction of the upper end edge is larger than the length in the front-rear direction of the lower end edge when the expanded and deployed state is viewed in a side view. Is formed. Further, the inner tube 26 is in an inflated and deployed state, the rear end edge 26R extends in parallel or substantially parallel to the rear end edge (folded line L) of the side airbag 20, and the front end edge 26F is directed upward as the seat moves upward. It inclines with respect to the seat bag height direction so as to go to the front side of the back 14.

  The inner tube 26 configured as described above has a function of guiding the gas ejected from the inflator 22 and rectified by the diffuser 24 to the lower side, the upper side, and the vehicle front side. Specifically, the gas G <b> 1 ejected from the lower opening 48 of the diffuser 24 is ejected downward from the lower opening 52 of the inner tube 26 and is supplied to the abdominal restraint part (lower part) 20 </ b> L of the side airbag 20. Further, the gas G2 ejected from the upper opening 46 of the diffuser 24 is ejected upward from the rear portion 50R of the upper opening 50 of the inner tube 26 and supplied to the shoulder restraining portion (upper portion) 20U of the side airbag 20. Further, the gas G3 ejected from the front opening 42 of the diffuser 24 flows obliquely upward in the front of the vehicle along the front edge 26F of the inner tube 26, and then from the front 50F of the upper opening 50 of the inner tube 26 to the front of the vehicle. It is ejected to the side (in detail, obliquely upward on the front side of the vehicle) and supplied to the chest restraint portion (vertical middle portion) 20M of the side airbag 20.

  That is, in the inner tube 26, the lower opening 52 is a downward (abdominal direction) opening, the rear part 50R of the upper opening 50 is an upward (shoulder direction) opening, and the front part 50F of the upper opening 50 is the forward direction. (Chest direction) It is an opening. Moreover, the inner tube 26 is formed so as to increase in diameter in a tapered shape toward the upper end side as described above, and the opening area of the upper opening 50 is set larger than the opening area of the lower opening 52. Accordingly, the flow rate of the gas ejected from the upper opening 50 (the total flow rate of G2 and G3) is configured to be larger than the flow rate of the gas G1 ejected from the lower opening 52. That is, more gas (G2, G3) flows into the upper opening 50, and a part (G3) thereof is distributed to the vehicle front side (the chest C side of the seated occupant P). In order to improve the initial restraint performance of the occupant by the side airbag, it is effective to restrain the seated occupant's shoulders early, and gas can be supplied to the upper side of the side airbags early. preferable.

  In the present embodiment, when the inflator 22 is operated, the gas G3 ejected from the front opening 42 of the diffuser 24 strikes the front edge portion 26F of the inner tube 26F, so that the inner tube 26 moves in the vehicle front-rear direction. It is extended. Accordingly, the upper opening 50 extends in a long shape (for example, an oval shape) along the vehicle front-rear direction. As a result, the front portion 50F of the upper opening 50 approaches the front end side of the chest restraint portion 20M, and the supply of the gas G3 to the front end side of the chest restraint portion 20M (region D indicated by a two-dot chain line in FIG. 2) is promoted. It is configured to be.

  Furthermore, in this embodiment, since the diffuser 24 has the front opening 42, the high temperature mist ejected with the gas from the gas ejection port 36 of the inflator 22 may be scattered to the front side of the vehicle. The front opening 42 of 24 is covered with the inner tube 26 from the vehicle front side. This prevents high-temperature mist ejected from the front opening 42 of the diffuser 24 from adhering to the base fabric 28 of the side airbag 20.

(Function and effect)
Next, the operation and effect of the first embodiment will be described.

  In the side airbag device 10 having the above-described configuration, when the side collision ECU 38 detects a side collision by a signal from the side collision sensor 40, the inflator 22 is operated by the side collision ECU 38. Then, the gas ejected from the inflator 22 is supplied into the side airbag 20, and the side airbag 20 is inflated and deployed between the seated occupant P and the door trim of the side door. As a result, the shoulder S, chest C and abdomen B of the seated occupant P are restrained by the side airbag 20.

  Here, in the present embodiment, the above-described inflator 22 is covered with an inner tube 26 provided in the side airbag 20. The inner tube 26 has a lower opening 52 that guides the gas ejected from the inflator 22 downward and an upper opening 50 that guides the gas upward. The opening area of the upper opening 50 is set larger than the opening area of the lower opening 52, and the gas ejected from the inflator 22 is guided to the vehicle front side by a part of the upper opening 50 (the front part 50 </ b> F). . That is, the inner tube 26 causes more gas to flow to the side of the upper opening 50 having a large opening area and guides a part (G3) to the front side of the vehicle. This not only promotes the inflation and deployment of the shoulder restraint portion 20U and the abdominal restraint portion 20L of the side airbag 20, but also the chest restraint portion 20M of the side airbag 20 (particularly, the front end side indicated by the two-dot chain line in FIG. The expansion of the region D) can also be promoted. As a result, the initial restraint performance of the chest C of the seated occupant P can be improved as compared with the conventional case.

  In addition, in this embodiment, the diffuser 24 covered with the inner tube 26 is provided, and the gas jetting part 22A of the inflator 22 is covered with the diffuser 24 from the vehicle rear side and both sides in the vehicle width direction. For this reason, the gas ejected from the gas ejection portion 22A of the inflator 22 is guided by the diffuser 24 to the upper and lower sides and the vehicle front side, that is, the inner tube 26 is guided to the gas by the lower opening 52 and the upper opening 50. The gas guiding effect (rectifying effect) by the inner tube 26 can be improved.

  Furthermore, in this embodiment, the inner tube (rectifying cloth) 26 sewn in a cylindrical shape is a rectifying member that guides gas from the inflator 22 to both the upper and lower sides and the vehicle front side. Since the inner tube 26 is formed in a cylindrical shape whose diameter increases in a tapered shape toward the upper end side, the opening area of the upper opening 50 is larger than the opening area of the lower opening 52. Thereby, a rectification | straightening member can be made into a very simple structure.

  Further, in this embodiment, since the front opening 42 of the diffuser 24 is covered from the vehicle front side by the inner tube 26, the high-temperature mist ejected from the front opening 42 of the diffuser 24 is the base fabric 28 of the side airbag 20. Can be prevented. Thereby, it can prevent that the base fabric 28 is damaged by high temperature mist.

<Second Embodiment>
Next, a second embodiment of the present invention will be described. In addition, about the structure and effect | action similar to the said 1st Embodiment, the same code | symbol as the said 1st Embodiment is provided, and the description is abbreviate | omitted.

  FIG. 5 is a side view showing an inflated and deployed state of a side airbag 62 that is a constituent member of the vehicle side airbag device 60 according to the second embodiment of the present invention. The side airbag 62 is different from the side airbag 20 according to the first embodiment in that the inside is partitioned by tethers (partition cloth: partitioning portions) 64 and 66.

  The tethers 64 and 66 are formed of the same cloth material as that of the base fabric 28. The tethers 64 and 66 are spanned between the one side portion 28A and the other side portion 28B of the base fabric 28, and at one side portion at a sewing portion (not shown). It is sewn to 28A and the other side part 28B. These tethers 64 and 66 partition (divide) the inside of the side airbag 62 into a front chamber 68 and a rear chamber 70, and the rear chamber 70 includes an inflator 22, a diffuser 24, and an inner tube 26. It is arranged. Hereinafter, the side airbag 62 in the inflated and deployed state will be described.

  In the side airbag 62, the lower tether 66 extends in the height direction of the side airbag 62 near the center in the front-rear direction of the side airbag 62, and the center in the front-rear direction of the chest C and the abdomen B of the seated occupant P It faces the part (or near the center in the front-rear direction). Accordingly, the front chamber 68 faces the front part of the side of the chest C and the abdomen B of the seated occupant P, and the rear chamber 70 faces the rear part of the side of the chest C and the side of the abdomen B of the seated occupant P.

  Further, in the side airbag 62, the upper tether 64 extends so as to incline forward on the front side of the upper portion of the side airbag 62. As a result, a front extension 70 </ b> A that extends upward (toward the vehicle front side) of the front chamber 68 is formed in the upper portion of the rear chamber 70, and the front extension 70 </ b> A faces the side surface of the shoulder S of the seated occupant P.

  The front chamber 68 and the rear chamber 70 are a communication port (vent hole) 72 provided between the rear end portion of the tether 64 and the upper end portion of the tether 66, and the lower end portion of the tether 66 and the lower end of the side airbag 62. It communicates via the communication port 74 provided between the parts.

  The lower communication port 74 is provided in a direction in which the gas G1 ejected from the lower opening 52 of the inner tube 26 flows, and the gas G1 is supplied to the front chamber 68 through the communication port 74. The upper communication port 72 is provided in a direction in which the gas G3 ejected from the front portion 50F of the upper opening 50 of the inner tube 26 flows, and the gas G3 is supplied to the front chamber 68 through the communication port 72. Is done. Specifically, the upper end of the inner tube 26 is positioned below the central portion in the vertical direction of the communication port 72, and the upper opening 50 and the communication port 72 of the inner tube 26 extend along the extending direction of the tether 64. Are configured to face each other.

  In this embodiment, the gas G2 ejected from the rear portion 50R of the upper opening 50 of the inner tube 26 is supplied to the upper side of the rear chamber 70 including the front extension 70A. In this embodiment, the configuration other than the above is the same as that of the first embodiment.

  In the side airbag device 60 configured as described above, since the inside of the side airbag 62 is partitioned into the front chamber 68 and the rear chamber 70 by the tethers 64 and 66, the internal pressures of the front chamber 68 and the rear chamber 70 are individually set. can do. Thereby, it becomes possible to restrain the front part and the rear part in the chest C and the abdomen B of the seated occupant P according to the respective resistances. That is, the rear part of the chest C and the abdomen B has higher resistance compared to the front part of the chest C and the abdomen B. Therefore, by setting the internal pressure of the rear chamber 70 higher than the internal pressure of the front chamber 68, the resistance is low. A highly resistant region can be effectively restrained while reducing the load on the region. As a result, the occupant restraint by the side airbag 62 can be improved.

  In addition, a communication port 72 that connects the front chamber 68 and the rear chamber 70 is provided at a position facing the upper opening 50 of the inner tube 26 in the side airbag 62. Thereby, the gas G3 ejected from the front portion 50F of the upper opening 50 of the inner tube 26 to the front side of the vehicle is satisfactorily supplied to the upper portion of the front chamber 68 (that is, the front portion of the intermediate portion in the vertical direction of the side airbag 62). can do. As a result, since the upper part of the front chamber 68 can be inflated and deployed at an early stage, the initial restraining performance of the chest C can be improved as in the first embodiment.

  Further, the upper arm portion A of the seated occupant P can be pushed up by the upper portion of the front chamber 68, and the upper arm portion A pushed up by the front extension portion 70A of the rear chamber 70 can be restrained. As a result, it is possible to prevent or suppress the upper arm A from being interposed between the chest C of the seated occupant P and the side airbag 62, so that the load on the chest C can be reduced.

<Third Embodiment>
Next, a third embodiment of the present invention will be described. In addition, about the structure and effect | action similar to each said embodiment, the same code | symbol as each said embodiment is provided, and the description is abbreviate | omitted.

  FIG. 6 is a side view showing an inflated and deployed state of a side airbag 82 which is a constituent member of the vehicle side airbag device 80 according to the third embodiment of the present invention. The side airbag 82 is basically configured in the same manner as the side airbag 62 according to the second embodiment, but the inside is separated from the front chamber 68 by a single tether (partition cloth: partitioning portion) 84. The rear chamber 70 is partitioned.

  In a state where the side airbag 82 is inflated and deployed, the longitudinally extending portion 84A of the tether 84 extends in the height direction of the side airbag 82 in the vicinity of the center portion in the front-rear direction of the side airbag 82, and the lateral extension of the tether 84 The portion 84B extends so as to incline forward on the front side of the upper portion of the side airbag 82. A communication port 72 that connects the front chamber 68 and the rear chamber 70 is formed on the upper end side of the longitudinally extending portion 84A. Further, the lower end portion of the vertically extending portion 84A reaches the lower end portion of the side airbag 82, and the communication port 74 according to the second embodiment is omitted.

  Moreover, in this embodiment, the structure of the inner tube 86 as a baffle cloth differs from the inner tube 26 in each said embodiment. The inner tube 86 includes a main body portion 86A that is sewn in a cylindrical shape whose diameter increases toward the upper end side, and a branch portion 86B that is sewn in a cylindrical shape and branches from the main body portion 86A. The main body portion 86A has basically the same configuration as the inner tube 26 in each of the above embodiments, and the inflator 22 and the diffuser 24 are covered by the main body portion 86A.

  Further, the branching portion 86B is formed so as to decrease in diameter toward the distal end side. The branching portion 86 </ b> B has a distal end inserted into the communication port 72 of the tether 84, and a distal end opening 90 opens at the top of the front chamber 68. Thereby, the inside of main part 86A and front chamber 68 are open for free passage via the inside of branching part 86B. In the present embodiment, the inner tube 86 having the main body portion 86A and the branching portion 86B is sewn with one piece of cloth material. However, the present invention is not limited to this, and the sewing method of the inner tube 86 may be changed as appropriate. it can.

  In a state in which the side airbag 82 is inflated and deployed, the branching portion 86B extends obliquely upward from the main body portion 86A, and the tip of the branching portion 86B is disposed near the lower portion of the laterally extending portion 84B of the tether 84. The direction in which the branching portion 86B extends is set substantially parallel to the direction in which the laterally extending portion 84B extends. In this embodiment, the configuration other than the above is the same as that of the first embodiment.

  In the side airbag device 80 configured as described above, the gas G1 ejected downward from the diffuser 24 is guided downward by the lower opening 52 of the main body 86A. Thereby, the expansion and deployment of the lower side of the rear chamber 70 is promoted. Further, the gas G2 ejected upward from the diffuser 24 is guided to the upper side and the vehicle front side by the upper opening 50 of the main body portion 86A. As a result, the expansion of the upper side of the rear chamber 70 including the front extension 70A is promoted. Moreover, since the opening area of the upper opening 50 is set larger than the opening area of the lower opening 52 as in the first embodiment, more gas G2 flows to the upper opening 50 side of the main body portion 86A. be able to. Thereby, the gas G2 can be supplied early to the upper side of the rear chamber 70 including the front extension 70A, and the shoulder S of the seated occupant P can be restrained early.

  Furthermore, in this embodiment, the front end opening 90 of the branch part 86B branched from the main body part 86A is opened to the front chamber 68, and the gas G3 ejected from the diffuser 24 to the vehicle front side passes through the branch part 86B. To the upper portion of the front chamber 68. As described above, since the dedicated branching portion 86B for supplying the gas G3 to the front chamber 68 is provided, the front side of the front chamber 68, that is, the middle portion in the vertical direction of the side airbag 82, is promoted. can do. As a result, the initial restraining performance of the chest C can be improved, and the upper arm A can be pushed up by the upper portion of the front chamber 68.

  In addition, in this embodiment, since the diameter of the branching portion 86B decreases toward the distal end side, the flow velocity of the gas G3 ejected from the distal end opening 90 of the branching portion 86B can be increased. As a result, the expansion and expansion of the upper portion of the front chamber 68 can be effectively promoted.

<Supplementary explanation of the embodiment>
In the third embodiment, the configuration is such that the main body portion 86A is sewn into a cylindrical shape that increases in diameter toward the upper end side, but this is not limiting, and the main body portion 86A has the same diameter at each portion along the axial direction. A formed configuration may be used. In this case, the capturing the bifurcation 86 B of the distal end opening 90 as part of the upper opening. That is, the upper opening of the rectifying member according to the present invention does not need to be one opening, and may be constituted by a plurality of openings. For example, even when a part of the upper end side of the inner tube 26 in the first embodiment is sewn and the upper opening 50 of the inner tube 26 is divided into two, the gas from the inflator 22 is forwarded to the vehicle front side by one of them. It is possible to guide. The present invention does not exclude such a configuration.

  In the second and third embodiments, a vent hole that allows the front chamber 68 and the outside of the side airbags 62 and 82 to communicate with each other may be formed in the lower portion of the front edge portion of the side airbags 62 and 82. Good. With such a configuration, it is possible to prevent the internal pressure of the front chamber 68 from becoming too high, and it is possible to reduce the load on the front portions of the chest C and the abdomen B, which have relatively low resistance.

  In the second and third embodiments, the front chamber 70A is provided in the rear chamber 70. However, the configuration is not limited thereto, and the front portion 70A may be omitted.

  Further, in the second and third embodiments, the inside of the side airbags 62 and 82 is divided into the front chamber 68 and the rear chamber 70. You may make it the structure partitioned off into the upper chamber and the lower chamber.

  In the second and third embodiments, the inside of the side airbags 62 and 82 is partitioned by the tethers 64, 66, and 84. However, the present invention is not limited to this, and the side air is separated by a seam (sewing part). You may make it the structure which partitions off the inside of a bag.

  Moreover, in the said 1st-3rd embodiment, although the inner tubes 26 and 86 as a rectification | straightening cloth were set as the rectification | straightening member, it is not restricted to this, The material of a rectification | straightening member can be changed suitably. For example, the rectifying member may be formed of a sheet-like material other than cloth.

  Moreover, in the said 1st-3rd embodiment, the inner tubes 26 and 86 as a rectification | straightening cloth (rectification | straightening member) are cylindrical by the cloth material separate from the base fabric 28 of the side airbags 20, 62 and 82. However, the present invention is not limited to this, and the rectifying member may be formed using a part of the base fabric of the side airbag. Or you may form a rectification | straightening member with a part of base fabric of a side airbag, and the cloth material separate from this base fabric.

  Furthermore, in the said 1st-3rd embodiment, although it was set as the structure provided with the diffuser 24, it is not restricted to this, For example, when a rectifying member is formed with a thick cloth material, a diffuser is abbreviate | omitted. Is also possible.

  Moreover, in the said 1st-3rd embodiment, it was set as the structure which restrains the shoulder part S of the seated passenger | crew P, the chest part C, and the abdominal part B by the side airbag 20, 62, 82, However, Not only this but side air The bag may be extended downward to restrain the seated occupant's waist.

  In addition, the present invention can be implemented with various modifications without departing from the scope of the invention. It goes without saying that the scope of rights of the present invention is not limited to the above embodiments.

DESCRIPTION OF SYMBOLS 10 Side airbag apparatus for vehicles 12 Seat for vehicles 14 Seat back 20 Side airbag 22 Inflator 22A Gas ejection part 24 Diffuser 26 Inner tube (rectifying cloth: rectifying member)
50 Upper Opening 52 Lower Opening 60 Side Airbag Device for Vehicle 62 Side Airbag 64, 66 Tether (Partition)
68 Front chamber 70 Rear chamber 70A Front extension 72 Communication port (vent)
80 Side airbag device for vehicle 82 Side airbag 84 Tether (partition)
86 Inner tube 86A Body part 86B Branch part 90 Tip opening

Claims (6)

An inflator provided in a side portion of a seat bag of a vehicle seat and ejecting gas by operating;
The inflator is housed in a folded state in the side portion and is inflated and deployed between the seated occupant and the vehicle body side by the gas ejected from the inflator, and at least the shoulder and chest of the seated occupant And a side airbag that restrains the abdomen,
The upper airbag is provided in the side airbag and covers the inflator, and has an upper opening that guides the gas ejected from the inflator upward and a lower opening that guides the gas downward. A rectifying member that guides the gas ejected from the inflator to the vehicle front side by a part of the upper opening by being set larger than the opening area of the lower opening;
Equipped with a,
The inside of the side airbag is partitioned into a front chamber and a rear chamber by a partitioning portion, and the front chamber and the rear chamber are aligned in the front-rear direction in the inflated and deployed state of the side airbag. A vehicle side airbag device in which the inflator and the rectifying member are provided, and the front chamber and the rear chamber communicate with each other through a vent provided at a position facing the upper opening . The rectifying member for a vehicle side airbag apparatus according to claim 1 Ru regulating cloth der that is sewn into a cylindrical shape whose diameter increases as it goes to the upper side. An inflator provided in a side portion of a seat bag of a vehicle seat and ejecting gas by operating;
The inflator is housed in a folded state in the side portion and is inflated and deployed between the seated occupant and the vehicle body side by the gas ejected from the inflator, and at least the shoulder and chest of the seated occupant And a side airbag that restrains the abdomen,
The upper airbag is provided in the side airbag and covers the inflator, and has an upper opening that guides the gas ejected from the inflator upward and a lower opening that guides the gas downward. A rectifying member that guides the gas ejected from the inflator to the vehicle front side by a part of the upper opening by being set larger than the opening area of the lower opening;
With
The inside of the side airbag is partitioned into a front chamber and a rear chamber by a partitioning portion, and the front chamber and the rear chamber are aligned in the front-rear direction in the inflated and deployed state of the side airbag. The inflator and the rectifying member are provided,
The rectifying member has a main body portion that is sewn in a cylindrical shape that increases in diameter toward the upper end side, and a branch portion that is sewn in a cylindrical shape and branches from the main body portion, and a tip opening opens to the front chamber. A vehicle side airbag device that is a rectifying cloth . The side airbag device for a vehicle according to claim 3 , wherein the branch portion is reduced in diameter toward the distal end side . 5. The vehicle side airbag device according to claim 1 , wherein the vehicle side airbag device includes a diffuser that is covered with the rectifying member and covers a gas ejection portion of the inflator from the vehicle rear side and the vehicle width direction both sides. . The vehicle side according to any one of claims 1 to 5, wherein a front extension portion is provided at an upper portion of the rear chamber so as to extend upward from the front chamber in an inflated and deployed state of the side airbag. Airbag device.