USRE46909E1 - Manufacturing method of airbag cushion, and the airbag cushion - Google Patents

Manufacturing method of airbag cushion, and the airbag cushion Download PDF

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Publication number
USRE46909E1
USRE46909E1 US13/845,207 US200713845207A USRE46909E US RE46909 E1 USRE46909 E1 US RE46909E1 US 200713845207 A US200713845207 A US 200713845207A US RE46909 E USRE46909 E US RE46909E
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United States
Prior art keywords
fabric panel
tether
front fabric
periphery
airbag cushion
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US13/845,207
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English (en)
Inventor
Takeshi Idomoto
Hiroya Tabushi
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Autoliv Development AB
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Autoliv Development AB
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Priority to US13/845,207 priority Critical patent/USRE46909E1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/2334—Expansion control features
    • B60R21/2338—Tethers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R2021/003—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks characterised by occupant or pedestian
    • B60R2021/0039—Body parts of the occupant or pedestrian affected by the accident
    • B60R2021/0044—Chest
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R2021/003—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks characterised by occupant or pedestian
    • B60R2021/0039—Body parts of the occupant or pedestrian affected by the accident
    • B60R2021/0048—Head
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/2334—Expansion control features
    • B60R21/2338—Tethers
    • B60R2021/23382—Internal tether means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/235—Inflatable members characterised by their material
    • B60R2021/23533—Inflatable members characterised by their material characterised by the manufacturing process
    • B60R2021/23538—Sewing

Definitions

  • the present invention relates to a manufacturing method of an airbag cushion including a rear fabric panel and two front fabric panels, and to the airbag cushion thereby manufactured.
  • An airbag system is well known to be equipped for used in cars.
  • the airbag system can injects inject gas generated by an inflator (gas generator) into an airbag cushion.
  • the generated gas inflates and deploys the airbag cushion.
  • the airbag cushion can absorb the impact of the car crash to protect an occupant of the car, by interposing between the occupant and the car body.
  • the airbag cushion is known to be equipped for a steering wheel or an instrumental panel on an assistant driver side to protect the face and the upper body of the occupants, for securing higher level safety.
  • Japanese Patent Application Laid-Open No. 2004-244005 discloses a technique of inflating and deploying an airbag cushion into a specific shape, to improve the safety level.
  • the airbag cushion described therein includes a right-side section and a left-side section. In a deployed state, the right-side and left-side sections catch hard costae of right-side and left-side chests the right side of the chest of the occupant and the left side of the chest of the occupant, respectively.
  • the airbag cushion described therein includes a cavity between the right-side section and the left-side section. In the deployed state, the cavity catches the sternums sternum located at the center of the chest to absorb the impact.
  • the airbag cushion according to Japanese Patent Application Laid-Open No. 2004-244005 requires, however, a large capacity to to be enclosed, because the airbag cushion should be is formed with six fabric panels including two front inner fabric panels, two front outer fabric panels, one rear inner fabric panel and one rear outer fabric panel. Furthermore, the airbag cushion according to Japanese Patent Application Laid-Open No. 2004-244005 needs much effort for sewing those fabric panels.
  • the airbag cushion according to Japanese Patent Application Laid-Open No. 2004-244005 includes strings attached respectively to the front inner fabric panels and strings attached respectively to the front outer fabric panels, to prevent a left side face of the right-side section from moving away from a right side face of the right-side section, and to prevent a left side face of the left-side section from moving away from a right side face of the left-side section, beyond a predetermined distance. Therefore, the airbag cushion according to Japanese Patent Application Laid-Open No. 2004-244005 needs further effort for the manufacture.
  • the present invention has been accomplished in view of the foregoing situations, with an object to provide an airbag cushion and a manufacturing method of the airbag cushion that save to reduce the number of fabric panels and have a simpler sewing processing, with a rear fabric panel and, two front panels protruding, and tether portions respectively protruding from the two front panels, wherein each tether portion are is sewn to an inner face of the rear fabric panel, by sewing a back first end of each tether portion and parts of peripheries of two front fabric panels in together to form a recessed shape.
  • the object includes a provision of such airbag cushion and such manufacturing method of the airbag cushion that can properly protect a head and a chest of an occupant by the configuration of the recessed shape.
  • a manufacturing method of an airbag cushion having a rear fabric panel and at least two front fabric panels comprises steps of: superimposing the two front fabric panels on each other, with a tether portion protruding from each of the front fabric panels protrudes a tether portion to be sewn to an inner face of the rear fabric panel; sewing on a back first end of the protruded tether portion portions and on parts of peripheries of the front fabric panels, in to form a recessed shape; sewing a front second end of the tether portion portions to the an inner face of the rear fabric panel; and sewing a periphery of the rear fabric panel to peripheries of the front fabric panels corresponding to the periphery of the rear fabric panel.
  • the tether portion is portions are configured from a part of the front fabric panel.
  • one end of each the front fabric panels panel is cut in advance.
  • a depth of the recessed shape is changed set when sewing on the back first end of the tether portion and on the parts of peripheries of the front fabric panels in to form a recessed shape.
  • a manufacturing method of an airbag cushion having a rear fabric panel and at least two front fabric panels comprises steps of: superimposing the two front fabric panels on each other; sewing parts of the front fabric panels to tether portions that are sewn to an inner face of the rear fabric panel; sewing on parts of peripheries of the front fabric panels in to form a recessed shape; sewing front second ends of the tether portions to the inner face of the rear fabric panel; and sewing a periphery of the rear fabric panel to peripheries of the front fabric panels corresponding to the periphery of the rear fabric panel.
  • a manufacturing method of an airbag cushion having a rear fabric panel and at least two front fabric panels comprises steps of: superimposing the front fabric panels on each other; superimposing parts of the front fabric panels on back first ends of tether portions that are sewn to an inner face of the rear fabric panel; sewing on parts of peripheries of the front fabric panels and on the back first ends of the tether portions, in to form a recessed shape; sewing front second ends of the tether portions to the inner face of the rear fabric panel; and sewing a periphery of the rear fabric panel and peripheries of the front fabric panels corresponding to the periphery of the rear fabric panel.
  • a manufacturing method of an airbag cushion having a rear fabric panel and a front fabric panel comprises steps of: folding the front fabric panel to superimposing superimpose portions of the front fabric panel; sewing on a part of the superimposed front fabric panel in portions to form a recessed shape; sewing an end of the front fabric panel to a back first end of a tether portion that is sewn to an inner face of the rear fabric panel; sewing a front second end of the tether portion to the inner face of the rear fabric panel; and sewing a periphery of the rear fabric panel and peripheries of the front fabric panels corresponding to the periphery of the rear fabric panel.
  • a depth of the recessed shape is changed set when sewing on a part of a periphery of the front fabric panel in to form a recessed shape.
  • an airbag cushion sewn including a rear fabric panel and at least two front fabric panels comprises: a peripheral stitch portion where a periphery of the rear fabric panel and each periphery of the front fabric panels corresponding to the periphery of the rear fabric panel are sewn; a recessed stitch portion where the front fabric panels are sewn together in to form a recessed shape; and a tether portion that projects from the recessed stitch portion or a vicinity of the recessed stitch portion, wherein the tether portion is sewn to an inner face of the rear fabric panel.
  • the tether portion is configured from a part of the front fabric panel, projects from the recessed stitch portion, and is sewn to the inner face of the rear fabric panel; and parts of peripheries of the front fabric panels and a back first end of the tether portion are sewn in together to form a recessed shape at the recessed stitch portion.
  • the tether portion is a separate structure from the pair of front fabric panels, projects from the recessed stitch portion or a vicinity of the recessed stitch portion, and is sewn to the inner face of the rear fabric panel; and parts of peripheries of the front fabric panels and a back first end of the tether portion are sewn in together to form a recessed shape at the recessed stitch portion.
  • parts of peripheries of the front fabric panels with the exception of the peripheral stitch portion and a back first end of the tether portion are sewn in together to form a recessed shape at the recessed stitch portion.
  • an airbag cushion sewn including a rear fabric panel and at least two front fabric panels comprises: a peripheral stitch portion where a periphery of the rear fabric panel and each periphery of the front fabric panels corresponding to the periphery of the rear fabric panel are sewn; a recessed stitch portion where the pair of front fabric panels are sewn together in to form a recessed shape; and a tether portion whose back first end is sewn to each of the front fabric panels and whose front second end is sewn to an inner face of the rear fabric panel.
  • an airbag cushion sewn including a rear fabric panel and a front fabric panel comprises: a recessed stitch portion where the front fabric panel being folded is sewn in to form a recessed shape; a peripheral stitch portion where a periphery of the rear fabric panel and a periphery of the front fabric panel corresponding to the periphery of the rear fabric panel are sewn; and a tether portion whose back first end is sewn to an end of the front fabric panel and whose front second end is sewn to an inner face of the rear fabric panel.
  • the airbag cushion includes a rear fabric panel and at least two front fabric panels.
  • the recessed stitch portion is formed by superimposing the front fabric panels on each other, with a tether portion protruding from each of the front fabric panels protrudes a tether portion to be sewn to an inner face of the rear fabric panel, and by sewing on a back first end of the protruded tether portion and on a part of a periphery of the front fabric panels, in to form a recessed shape.
  • the front second end of the tether portion is then sewn to the an inner face of the rear fabric panel.
  • peripheral stitch portion is formed by sewing a periphery of the rear fabric panel to peripheries of the front fabric panels corresponding to the periphery of the rear fabric panel. Therefore, it is possible to prevent the rear fabric panel from being deployed beyond a predetermined width, because of the tether portion projecting from the pair of the front fabric panels and being sewn to the inner face of the rear fabric panel.
  • the airbag cushion includes a rear fabric panel and a front fabric panel. Firstly, the front fabric panel is folded to superimpose portions of the front fabric panel on each other, and then the front fabric panel being folded is sewn in to form a recessed shape. The end of the front fabric panel is sewn to the back first end of the tether portion. The front second end of the tether portion is then sewn to the inner face of the rear fabric panel. In addition, a periphery of the rear fabric panel is sewn to a periphery of the front fabric panel corresponding to the periphery of the rear fabric panel.
  • the present invention it is possible to prevent the rear fabric panel from being inflated and deployed beyond a predetermined width, because of the tether portion portions projecting from the pair of the front fabric panels. Furthermore, it is possible to properly protect the head or the sternum of the occupant with the use of a space of the recessed stitch portion, because the back first end portion portions of the projecting tether portion portions and parts of the peripheries of the front fabric panels are sewn in to form a recessed shape by at the recessed stitch portion. Moreover, it is possible to properly protect the shoulder and the costae of the occupant because of the front fabric panels that are properly inflated and deployed in the left and right direction respectively. In addition, it is possible to improve manufacturing efficiency because of saving the number of panels and sewing processes. It is further possible to save reduce the manufacturing capacity required for installing the airbag cushion.
  • the present invention it is possible to improve manufacturing efficiency and to save reduce the manufacturing capacity required for installing the airbag cushion and the like, because of the configuration with one rear fabric panel, one front fabric panel and a tether portion to prevent extra-inflation.
  • the present invention provides further advantages as described above.
  • FIG. 1 is a plan view showing a shape of a front fabric panel
  • FIG. 2 is a plan view showing a shape of a rear fabric panel
  • FIG. 3 is a plan view showing a state where two front fabric panels are sewn together
  • FIG. 4 is a schematic perspective view showing the rear fabric panel folded along a folding line
  • FIG. 5 is a schematic perspective view showing the right rear fabric panel sewn with the front fabric panel panels
  • FIG. 6 is a schematic side view showing an airbag cushion that is equipped in an instrumental panel on an assistant driver side while being inflated and deployed;
  • FIG. 7 is a schematic front view showing the airbag cushion inflated and deployed
  • FIG. 8 is a schematic cross-sectional view taken along a line VIII-VIII in FIG. 6 ;
  • FIG. 9 is a plan view showing a shape of a front fabric panel and a tether portion according to a second embodiment
  • FIG. 10 is a plan view showing front fabric panels, tether portions and a state where the front fabric panels and the tether portions are sewn together;
  • FIG. 11 is a plan view showing a shape of a front fabric panel and a tether portion according to a third embodiment.
  • FIG. 12 is a plan view showing a shape of a front fabric panel according to a fourth embodiment
  • FIG. 13 is a plan view showing a state where two front fabric panels are sewn together
  • FIG. 14 is a plan view showing a shape of a front fabric panel according to a fifth embodiment
  • FIG. 15 is a plan view showing a state where the front fabric panel is sewn
  • FIG. 16 is a plan view showing a state where the front fabric panel and the tether portion portions are sewn together;
  • FIG. 1 is a plan view showing a shape of the front fabric panel.
  • a numeral numerals 10 designates and 20 designate the front fabric panel panels.
  • the front fabric panel 10 is made from a cloth woven with a nylon fiber, and is cut to make the plan view of the front fabric panel into an ocarina-like shape.
  • the front fabric panel 10 is configured with a head portion 13 that is a substantial semi-elliptic shape, a tether portion 11 that is projecting in an opposite direction to the head portion 13 , and an intermediate portion 12 that is a rectangular shape to join the head portion 13 and the tether portion 11 .
  • the front fabric panel 10 is formed in a similar shape to the other front fabric panel 20 (Ref. FIG. 3 ).
  • the tether portion 11 is a rectangular shape. Further, the tether portion 11 is longitudinally printed, at the side, first guide marks 14 , 14 , . . . that are indicated by void circles are longitudinally printed at the side of the tether portion 11. As it will be described later, a longer side of the tether portion 11 is sewn to an inner face of the rear fabric panel, to prevent the rear fabric panel from moving away from the front fabric panel 10 beyond a predetermined distance when the airbag cushion is inflated and deployed. The first guide marks 14 , 14 , . . . are used to sew the tether portion 11 to the inner face of the rear fabric panel in a proper alignment.
  • the tether portion 11 has a back first end 160 that is linear, at another side opposite to the side printed on which the first guide marks 14 , 14 , . . . are printed. As it will be described later, second guide marks 15 , 15 , . . . are printed on the back first end 160 . It should be noted that this embodiment is explained with the printed first guide marks 14 , 14 , . . . for ease of illustration. Thus, in various embodiments, the first guide marks 14 , 14 , . . . may not be printed for visualization. Also, it should be noted that the tether portion 11 may be another suitable shape, although this embodiment is explained with the tether portion 11 of a rectangular shape. For example, the tether portion 11 may be such a trapezoidal shape that the side printed with the first guide marks 14 , 14 , . . . is shorter than the opposite side formed with the back first end 160 .
  • the intermediate portion 12 is a rectangular shape, and is joined to the back first end 160 of the tether portion 11 at the side and to the head portion 13 at other side opposite to the back first end 160 .
  • the joining of intermediate portion 12 to the head portion 13 is at an upper position than relative to a center position of the substantial semi-elliptic-shaped head portion 13 .
  • the periphery of the head portion 13 and the intermediate portion 12 is configured from an arc-shaped peripheral portion 133 that is sewn to a periphery of the rear fabric panel and substantial L-shaped peripheral portions 134 , 134 where the front fabric panel 10 is sewn to the front fabric panel 20 .
  • the front fabric panel 10 has the second guide marks 15 , 15 , . . . printed along the L-shaped peripheral portions 134 , 134 , and the linear back first end 160 , while the second guide marks 15 , 15 , . . . are used to sew the front fabric panel 10 to the front fabric panel 20 in a proper alignment.
  • Each of the second guide marks 15 , 15 , . . . , indicated by a panel rectangle, is used to sew the front fabric panel 10 to the front fabric panel 20 and thereby form the front fabric panels 10, 20 in a recessed shape in the plan view.
  • a recessed direction of the each second guide mark 15 of the front fabric panels 10, 20 is the same as a projecting direction of the tether portion 11 .
  • the front fabric panel 10 has third guide marks 16 , 16 , . . . , which are indicated by void triangles, printed along the arc-shaped peripheral portion 133 of the head portion 13 .
  • the third guide marks 16 , 16 , . . . are used to sew the rear fabric panel to the arc-shaped peripheral portion 133 of the front fabric panel 10 in a proper alignment, while being different from the second guide marks 15 , 15 , . . . that are used to sew the front fabric panel 10 to the front fabric panel 20 in a proper alignment.
  • FIG. 2 is a plan view showing a shape of the rear fabric panel.
  • a numeral 30 designates the rear fabric panel whose silhouette looks like an elephant with the ears, the nose, and the head.
  • the rear fabric panel 30 is made from a cloth woven with a nylon fiber, as well as the front fabric panel 10 . While having a folding line indicated by dash-dot lines at the center, the rear fabric panel 30 includes a left rear portion or left lateral side 31 L and, a right rear portion or right lateral side 31 R, and a rear or back side 31B, with the left and right rear portions 31L and 31R extending from the back side 31B toward the front fabric panels 20 and 10, respectively.
  • the rear fabric panel 30 includes an inflator connection portion 32 projecting downward along the folding line, and is symmetrical with respect to the folding line.
  • the inflator connection portion 32 has a first longitudinal side 32L, a second longitudinal side 32R, and an inflator inlet 33 at the upper center.
  • Each of the first and second longitudinal sides 32L and 32R includes a first side portion 32F that is substantially parallel to the folding line and a second side portion 32S that tapers inward toward the folding line as the inflator connection portion 32 projects from the left and right rear portions 31L and 31R.
  • the inflator inlet 33 is formed in a circular shape by cutting. Through the inflator inlet 33 , gas from a gas generator (not shown) is injected into the airbag cushion when the airbag cushion is deployed.
  • the rear fabric panel 30 has fourth guide marks 34 , 34 , . . . , which are indicated by void diamond shapes, printed along a periphery of the inflator connection portion 32 and lower peripheries of the left rear portion 31 L and the right rear portion 31 R. As shown in FIG. 2, the lower peripheries of the left and right rear portions 31L and 31R are substantially perpendicular to the folding line.
  • the fourth guide marks 34 , 34 , . . . are used to sew one longitudinal side of the inflator connection portion 32 to the lower periphery of the left rear portion 31 L and the other longitudinal side of the inflator connection portion 32 to the lower periphery of the right rear portion 31 R, in a proper alignment.
  • the fourth guide marks 34 , 34 , . . . for the one longitudinal side of the inflator connection portion 32 is are printed symmetrically with respect to other fourth guide marks 34 , 34 , . . . for the other longitudinal side of the inflator connection portion 32 .
  • An arc-shaped peripheral portion 133 a of the left rear portion 31 L corresponds to the arc-shaped peripheral portion 133 of the front fabric panel 10 .
  • the left rear portion 31 L has the third guide marks 16 , 16 , . . . , which are indicated by void triangles, printed along the peripheral portion with exception of the portion where the fourth guide marks 34 , 34 , . . . are printed.
  • the left rear portion 31 L has the first guide marks 14 , 14 , . . . , which are indicated by the void circles, printed at in a row extending through the substantial center or substantial midpoint of the left rear portion 31L in an orthogonal direction to the folding line.
  • the right rear portion 31 R has the first guide marks 14 , 14 , . . . , the third guide marks 16 , 16 , . . . and the fourth guide marks 34 , 34 , . . . that are printed at the symmetrical positions with those on the left rear portion 31 L, respectively. It should be noted that this embodiment is explained with the first guide marks 14 , 14 , . . . , the second guide marks 15 , 15 , . . .
  • the first guide marks 14 , 14 , . . . , the second guide marks 15 , 15 , . . . , the third guide marks 16 , 16 , . . . , and the fourth guide marks 34 , 34 , . . . may not be printed for visualization.
  • FIG. 3 is a plan view showing a state where the two front fabric panels 10 , 20 are sewn together.
  • the front fabric panel 10 is superimposed on the front fabric panel 20 to keep the conformity in positions of the peripheral portions, as the front fabric panel 10 is substantially the same shape as the front fabric panel 20 .
  • the front fabric panel 10 and the front fabric panel 20 are then sewn together along the second guide marks 15 , 15 , . . . , to form second stitch portions (recessed stitch portion) 151 , 151 , . . .
  • the second stitch portions 151 , 151 , . . . are formed along the L-shaped peripheral portions 134 , 134 , and the linear back first end 160 , as well as the second guide marks 15 , 15 , . . . , to make form the front fabric panels 10, 20 in a recessed shape. Therefore, a space is the front fabric panels 10, 20 are formed in a recessed shape by sewing together the front fabric panel 10 and the front fabric panel 20 . It is possible for the space to catch the head or sternum of the occupant when the airbag cushion is inflated and deployed.
  • FIG. 4 is a schematic perspective view showing the rear fabric panel 30 folded along the folding line.
  • the rear fabric panel 30 shown in FIG. 2 is folded along the folding line in a direction from the sheet face toward the viewer about the folding line, to superimpose the right rear portion 31 R on the left rear portion 31 L.
  • the inflator connection portion 32 and the inflator inlet 33 are also folded in the same direction (from the sheet face toward the viewer) along the folding line.
  • the fourth guide marks 34 , 34 , . . . at one of the longitudinal sides of the inflator connection portion 32 are superimposed on the fourth guide marks 34 , 34 , . .
  • fourth stitch portions 341 , 341 , . . . are formed, which are indicated by solid diamond shapes, by sewing the fourth guide marks 34 , 34 , . . . of the inflator connection portion 32 and the right panel 31 R.
  • the inflator connection portion 32 is then sewn up in the areas 321 , 321 of the shorter front second end. Therefore, in a side view of the rear fabric panel 30 , the inflator inlet 33 is arranged in a semicircular shape at a bottom of the rear fabric panel 30 and is opened toward outside of the rear fabric panel 30 .
  • FIG. 5 is a schematic perspective view showing the right rear portion 31 R sewn to the front fabric panel 10 .
  • the front fabric panel 10 and the front fabric panel 20 are inserted from the tether portion portions 11 into the inwardly folded rear fabric panel 30 , while the second stitch portions 151 , 151 , . . . keep the front fabric panel 10 and the front fabric panel 20 to be sewn together.
  • the first guide marks 14 , 14 , . . . along one side of the tether portion 11 projecting from the front fabric panel 10 are superimposed on the first guide marks 14 , 14 , . . .
  • first stitch portions 141 , 141 , . . . are formed, which are indicated by solid circles, by sewing the first guide marks 14 , 14 , . . . of the tether portion 11 and the right panel 31 R. Therefore, it is possible for the first stitch portions 141 , 141 , . . . to prevent the front fabric panel 10 from moving away from the right panel 31 R beyond a predetermined width.
  • the front fabric panel 10 is folded to conform the its own arc-shaped peripheral portion 133 to the arc-shaped peripheral portion 133 a of the right rear portion 31 R.
  • the third guide marks 16 , 16 , . . . of the front fabric panel 10 are then superimposed on the third guide marks 16 , 16 , . . . of the right rear portion 31 R, to sew up together.
  • third stitch portions (peripheral stitch portions) 161 , 161 , . . . are formed, which are indicated by solid triangles, by sewing the third guide marks 16 , 16 , . . . of the front fabric panel 10 and the right panel 31 R.
  • first guide marks 14 , 14 , . . . of the left rear portion 31 L are superimposed on the first guide marks 14 , 14 , . . . of the left rear portion 31 L, to sew up together.
  • other first stitch portions 141 , 141 , . . . are formed by sewing the first guide marks 14 , 14 , . . . of the front fabric panel 20 and the left rear portion 31 L.
  • the third guide marks 16 , 16 , . . . printed on the front fabric panel 20 are then superimposed on the third guide marks 16 , 16 , . . . printed on the left rear portion 31 L, to sew up together.
  • the airbag cushion may be manufactured by reverse processing.
  • the tether portion portions 11 may be sewn to the right rear portion 31 R or the left rear portion 31 L by forming the first stitch portions 141 , 141 . . . , and then the inflator connection portion 32 may be sewn to the left rear portion 31L and the right rear portion 31R to form the fourth stitch portions 341 , 341 , . . . .
  • the sequence of the sewing process may be modified as desired, according to the manufacturing condition.
  • FIG. 6 is a schematic side view showing the airbag cushion equipped in the instrumental panel on an assistant driver side, in a deployed state
  • FIG. 7 is a schematic front view showing the airbag cushion in the deployed state
  • FIG. 8 is a schematic cross-sectional view taken along a line VIII-VIII in FIG. 6 .
  • the airbag cushion which is manufactured through the sewing processing described above, is folded in a predetermined shape and stored in an airbag cushion case 2 .
  • a gas supply pipe (not shown) of an inflator 3 is inserted to into the inflator inlet 33 shown in FIG. 5 .
  • the inflator 3 and the airbag cushion case 2 are equipped inside the instrumental panel 1 on the assistant driver side.
  • the gas is supplied through the gas supply pipe (not shown) of the inflator 3 , and then the supplied gas is injected into the airbag cushion through the inflator inlet 33 .
  • the inflator inlet 33 and the inflator connection portion 32 are not shown in FIG. 6 for abbreviation.
  • the airbag cushion is inflated and deployed along the instrumental panel 1 and a front glass 4 .
  • the injected gas is loaded into a space defined by three stitch portions on the right rear portion 31 R and and/or the front fabric panel 10 : the second stitch portions 151 , 151 , . . . formed to make the front fabric panel 10 in a recessed shape, the first stitch portions 141 , 141 , . . . formed to prevent the front fabric panel 10 from moving away from the right rear portion 31R beyond a predetermined width, the third stitch portions 161, 161 . . .
  • the injected gas is loaded into a space defined by three stitch portions on the left rear portion 31 L and and/or the front fabric panel 20 : the second stitch portions 151 , 151 , . . . formed to make the front panel 20 a recessed shape, the first stitch portions 141 , 141 , . . .
  • the airbag cushion is inflated and deployed with symmetry of the pattern in a symmetric shape, while directing the front fabric panel 10 and the front fabric panel 20 toward the occupant. Since the front fabric panel 10 and the front fabric panel 20 are sewn together via the second stitch portions 151 , 151 , . . . , the airbag cushion is prevented the front fabric panel 10 is prevented from moving away from the front fabric panel 20 .
  • the second stitch portions 151 , 151 , . . . are formed to make the front fabric panels 10, 20 in a recessed shape in side view.
  • a recessed bag portion of the airbag is formed with by the intermediate portions 12 , 12 , while having the back end first ends 160 of the tether portion portions 11 as the end face form the bottom of the recessed portion.
  • the front fabric panel 10 and the front fabric panel 20 contact the shoulders or the costae of the occupant to absorb the impact.
  • the recessed bag catches the head or the chest to absorb the impact properly.
  • the tether portion portions 11 configures a part are parts of the front fabric panel panels 10 , 20. In other words, one of the tether portion portions 11 is a part of the front fabric panel 10 , and the other one of the tether portions 11 is a part of the front fabric panel 20.
  • a first continuous fabric member may define the front fabric panel 10 and one of the tether portions 11, and a second continuous fabric member may define the front fabric panel 20 and the other one of the tether portions 11. Therefore, it is possible to manufacture the airbag cushion through a simplified processing, because of sewing the front end second ends of the tether portion portions 11 to the rear fabric panel.
  • each one side (frontsecond end) of each of the tether portions 11 , 11 is sewn at first stitch portions 141 , 141 , . . . on an inner face of (or disposed on) the left rear portion 31 L or on an inner face of (or disposed on) the right rear portion 31 R that is different than and opposes the inner face of the left rear portion 31L, as shown in FIGS. 6 and 8 .
  • a spacing between the front fabric panel 10 and the right rear portion 31 R, as well as a spacing between the front fabric panel 20 and the left rear portion 31 L within bounds corresponding to a spacing distance between the one side (frontsecond end) of each of the tether portion portions 11 defined by that is sewn at the first stitch portions 141 , 141 , . . . and the back first end 160 on the other side of each of the tether portion portions 11 defined by that is sewn at the second stitch portions 151 , 151 , . . . , at the moment of the inflation/deployment of the airbag cushion.
  • the airbag cushion may be equipped inside a steering wheel on a driver side, a back side of a front seat to protect an occupant on a rear seat, or a handle component of a motorcycle.
  • this embodiment is explained to manufacture the airbag cushion with the rear fabric panel 30 , the front fabric panel 10 , the front fabric panel 20 and two tether portions 11 , 11 , for illustration.
  • An additional fabric panel may be utilized to manufacture the airbag cushion as appropriate.
  • the first embodiment is explained to have the tether portion portions 11 that is are a part of the front fabric panel panels 10 , 20.
  • the tether portion portions 11 may be a separate structure from the front fabric panel panels 10 , 20.
  • FIG. FIGS. 9 is a and 10 are plan view views showing a shape of the front fabric panel panels 10 a, 20a and the tether portion portions 11 a according to a second embodiment.
  • the front fabric panel panels 10 a, 20a of the second embodiment is are shorter than the front fabric panel panels 10 , 20 of the first embodiment by a size corresponding to the tether portion portions 11 a, because the tether portion portions 11 a of the second embodiment is a are separate structure structures from the front fabric panel panels 10 a, 20a.
  • the tether portion portions 11 a is are formed in a rectangular shape, and made of the same material as that of the front fabric panel panels 10 a, 20a or a composite material containing an elastic material such as a polyurethane fiber.
  • the front fabric panel 10 a is placed to arrange the back first end 160 of the tether portion 11 a under the second guide marks 15 of the front fabric panel 10 a.
  • a configuration for the front fabric panel 20 a is similar to the configuration for the front fabric panel 10 a and, accordingly, will not be described in detail.
  • FIG. 10 is a plan view showing a state where the front fabric panel 10 a and one of the tether portion portions 11 a, as well as the front fabric panel 20 a and the other one of the tether portion portions 11 a, are sewn up together.
  • the tether portions 11 a, 11 a are inserted into a space between the front fabric panel 10 a and the front fabric panel 20 a.
  • each tether portion 11 a partially overlaps the front fabric panel 10 a or the front fabric panel 20 a.
  • the back first ends 160 , 160 of the tether portions 11 a, 11 a are sewn to the front fabric panels 10 a, 20 a along the second guide marks 15 , 15 , . . .
  • the second stitch portions (recessed stitch portion portions) 151 , 151 , . . . are formed to make a recessed shape, which are indicated by solid triangles, by sewing the back first ends 160 , 160 of the tether portions 11 a, 11 a and the front fabric panels 10 a, 20 a together to make a recessed shape.
  • the tether portions 11a, 11a may be joined to one another at an intersection between the front fabric panels 10a, 20a and the tether portions 11a, 11a, and the tether portions 11a, 11a may be joined directly to the front fabric panels 10a, 20a.
  • this embodiment is explained to have the tether portion portions 11 a which is are vertically long with a rectangular shape, for illustration.
  • the tether portion portions 11 a may be horizontally long with a rectangular shape. It is possible to improve design flexibility for the tether portion portions 11 a which is are configured to be a separate structure structures from the front fabric panel panels 10 a, 20a.
  • the material of the tether portion portions 11 a it is possible to modify the material of the tether portion portions 11 a to an elastic material, as appropriate. Furthermore, it is possible to simplify the processing to manufacture the airbag cushion, for by sewing together the back first ends 160 , 160 of the tether portions 11 a, the front fabric panel 10 a and the front fabric panel 20 a along the second stitch portions 151 , 151 , . . . at a the same time.
  • FIG. 11 is a plan view showing a shape of the front fabric panel 10 a and the tether portion portions 11 a according to the third embodiment.
  • the front fabric panel 10 a and the tether portion portions 11 a of the third embodiment are formed in the same shapes as those of the second embodiment.
  • the tether portion portions 11 a of the third embodiment is are further made of the same material as that of the second embodiment.
  • the front fabric panel 10 a is placed to arrange the back first end 160 of the tether portion 11 a between a front second end of the front fabric panel 10 a and the second guide marks 15 , 15 , . . . of the front fabric panel 10 a. It should be noted that the tether portion 11 a may be placed on the front fabric panel 10 a.
  • the back first end 160 of the tether portion 11 a is then sewn to a portion between the front second end of the front fabric panel 10 a and the second guide marks 15 , 15 , . . . .
  • fifth stitch portions 111 , 111 , . . . are formed by sewing the back first end 160 and the front fabric panel 10 a. Therefore, it is possible to join the back first end 160 of the tether portion 11 a to the front fabric panel 10 a which is a separate structure from the tether portion 11 a.
  • the front fabric panel 10 a and the front fabric panel 20 a are then sewn together, as shown with FIG. 3 in the first embodiment, to form second stitch portions (recessed stitch portion portions) 151 , 151 , .
  • a configuration for the front fabric panel 20 a is similar to the configuration for the front fabric panel 10 a and, accordingly, will not be described in detail.
  • FIG. 12 is a plan view showing a shape of a front fabric panel.
  • the tether portion 11 protruding from front fabric panel 10 of the fourth embodiment protrudes is longer than the tether portion 11 than that of the first embodiment.
  • the tether portion 11 is a rectangular shape that projecting direction is longer in the projecting direction.
  • a design parameter such as a size, an inflation tolerance, an equipped position of the airbag and the like, the tether portion 11 is cut from a direction crossing to the projecting direction.
  • the tether portion 11 may be cut from a direction crossing to the projecting direction, for example, at a position indicated by the dash line or the alternate long and short dash line in FIG. 12 . If the tether portion 11 needs to be longer shorter, it is cut from a direction crossing to the projecting direction, at a position indicated by the dash line near nearer the head portion 13 . If the tether portion 11 needs to be shorter longer, it is cut from a direction crossing to the projecting direction, at a position indicated by the alternate long and short dash line away further from the head portion 13 .
  • the front fabric panel 20 also has the tether portion 11 cut at a position to lead leave the same length as the tether portion 11 of the front fabric panel 10 , although it is not shown.
  • FIG. 13 is a plan view showing a state where two front fabric panels 10 , 20 are sewn together.
  • a depth of the recessed portion of the recessed stitch portion 151 also may be changed in accordance with a design. If the tether portion portions 11 needs need to be longer, the recessed stitch portion 151 may be sewn, for example, to have a shallower depth. On the other hand, if the tether portion portions 11 needs need to be shorter, the recessed stitch portion 151 may be sewn, for example, to have a deeper depth.
  • FIG. 13 is an illustration for the recessed stitch portion 151 having a shallower depth. If the tether portion portions 11 needs need to be longer, the front fabric panel 10 may be sewn to the front fabric panel 20 at a position for shallower depth of the recessed portion, i.e. at a position near nearer the head portion portions 13 , to form a second stitch portion (recessed stitch portion portions) 151 indicated by solid rectangle shapes. On the other hand, if the tether portion portions 11 needs to be shorter, the front fabric panel 10 may be sewn to the front fabric panel 20 at a position away further from the head portion portions 13 for deeper depth of the recessed portion, i.e. at the second guide marks 15 indicated by void rectangular shapes in FIG. 13 . These configurations allow making each the front fabric panels 10 , 20 have the tether portion portions with suitable length in accordance with a design.
  • the airbag has one front fabric panel 10 b.
  • FIG. 14 is a plan view showing a shape of a front fabric panel according to the fifth embodiment.
  • the front fabric panel 10 b includes two head portions 13 , 13 and two intermediate portions 12 , 12 joining respectively to the two head portions 13 , 13 .
  • the front fabric panel 10 b is a symmetrical shape relative to a substantial center in the longitudinal direction indicated by the alternate long and short dash line.
  • the intermediate portion portions 12 is are joined to the head portion portions 13 , at an upper position than relative to a center position of the substantial semi-elliptic-shaped head portion portions 13 .
  • a periphery of the head portion portions 13 joined to the intermediate portion portions 12 includes the arc-shaped peripheral portions 133 , 133 , . . . that are sewn to a periphery of the rear fabric panel and the substantial L-shaped peripheral portions 134 , 134 , . . . that are sewn together after folding the front fabric panel 10 b along a position or fold line indicated by the alternate long and short dash line.
  • the front panel 10 is printed the second guide marks 15 , 15 , . . . indicated by alternate long and short dash line void rectangle shapes, are printed at some portions of the front panel 10b.
  • the second guide marks 15 , 15 , . . . are used to sew after superimposing each of the head portions 13 , 13 and each of the intermediate portions 12 , 12 in a proper alignment by folding.
  • the second guide marks 15 , 15 , . . . are printed along the periphery of the front fabric panel 10 b, as shown by the void rectangle shapes.
  • the front panel 10 may be printed plural lines of the second guide marks 15 , 15 , . . . extending in the vertical direction crossing to the longitudinal direction may be printed on the front panel 10b. It should be noted that this embodiment is explained to have two lines of the second guide marks 15 , 15 , . . . extending in the vertical direction crossing to the longitudinal direction, for illustration. Each of the two lines of the second guide marks 15, 15, . . . extending in the vertical direction are substantially parallel to and spaced apart from the fold line indicated by the alternate long and short dash line.
  • the front fabric panel 10 b may be sewn along the second guide marks 15 near nearer the head portion portions 13 to form the recessed shape.
  • the front fabric panel 10 b may be sewn along the second guide marks 15 away further from the head portion portions 13 , near the center, to form the recessed shape.
  • the third guide marks 16 , 16 , . . . that, which are indicated by void triangle shapes.
  • the third guide marks 16 , 16 , . . . are used to sew the rear fabric panel 30 and the arc-shaped peripheral portions 133 , 133 of the front fabric panel 10 b in a proper alignment.
  • FIG. 15 is a plan view showing a state where the front fabric panel 10b is sewn.
  • the front fabric panel 10 b is folded along the alternate long and short dash line. Respective head portions 13 , 13 , as well as respective intermediate portions 12 , 12 , are properly superimposed. Then, the front fabric panel 10 b is sewn along one of the lines of the second guide mark marks 15 to form a second stitch portion portions (recessed stitch portion portions) 151 and thereby form the front fabric panel 10b in a recessed shape.
  • the front fabric panel 10 b is sewn along the second guide mark marks 15 positioned away further from the head portion portions 13 , to make the recessed depth deeper.
  • FIG. 16 is a plan view showing a state where the front fabric panel 10b and the tether portion portions 11 a are sewn together.
  • the back end first ends 160 of the tether portion portions 11 a is are sewn to a portion of the front panel 10 b for folding.
  • This embodiment is explained to have the tether portion portions 11 a that is configured from two rectangular tether portions 11 a, 11 a, for illustration.
  • one rectangular tether portion may be utilized, for example, to fold by folding along the substantial center of the one rectangular tether portion in the same manner as the front fabric panel 10b, and to be sewn sewing the folded portion as the back end 160 of the one rectangular tether portion to a portion of the front fabric panel 10 , in the same manner 10b just as the first ends 160 are sewn to the front fabric panel 10 b.
  • One back first end 160 of the tether portion portions 11 a is put on the one surface of the front fabric panel 10 b, and the other back first end 160 of the tether portion portions 11 a is put on the reverse surface of the front fabric panel 10 b. Firstly, the one back first end 160 of the tether portion portions 11 a is then sewn. Secondly, the one surface and reverse surface of the front fabric are sewn. Finally, the other back first end 160 of the tether portion portions 11 a is sewn. Therefore, it is configured a sewn component is made from the front fabric panel 10 b and the tether portion portions 11 a. How to sew the sewn component to the rear panel 30 is in the same manner as that of the first embodiment and, accordingly, will not have been described in detail.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)
US13/845,207 2006-09-22 2007-09-11 Manufacturing method of airbag cushion, and the airbag cushion Active 2028-03-31 USRE46909E1 (en)

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JP2006-257787 2006-09-22
US12/441,455 US7909362B2 (en) 2006-09-22 2007-09-11 Manufacturing method of airbag cushion, and the airbag cushion
PCT/JP2007/067647 WO2008035589A1 (en) 2006-09-22 2007-09-11 Method of manufacturing airbag and airbag
US13/845,207 USRE46909E1 (en) 2006-09-22 2007-09-11 Manufacturing method of airbag cushion, and the airbag cushion

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Office Action regarding Japanese Application No. 2012-287689 dated Nov. 11, 2014. Translation provided by Kohno & Kohno.

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CN102756703A (zh) 2012-10-31
CN102756703B (zh) 2015-03-11
JP5203211B2 (ja) 2013-06-05
WO2008035589A1 (en) 2008-03-27
CN101516686A (zh) 2009-08-26
JP2013056671A (ja) 2013-03-28
EP2090474A4 (en) 2009-11-25
JPWO2008035589A1 (ja) 2010-01-28
CN101516686B (zh) 2012-08-08
EP2090474A1 (en) 2009-08-19
JP5783998B2 (ja) 2015-09-24
US7909362B2 (en) 2011-03-22
US20100013204A1 (en) 2010-01-21

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