WO2013031009A1 - 自動車用サイドエアバッグ装置 - Google Patents
自動車用サイドエアバッグ装置 Download PDFInfo
- Publication number
- WO2013031009A1 WO2013031009A1 PCT/JP2011/069952 JP2011069952W WO2013031009A1 WO 2013031009 A1 WO2013031009 A1 WO 2013031009A1 JP 2011069952 W JP2011069952 W JP 2011069952W WO 2013031009 A1 WO2013031009 A1 WO 2013031009A1
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- WO
- WIPO (PCT)
- Prior art keywords
- airbag
- panel
- chamber
- side airbag
- sewn
- Prior art date
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Classifications
-
- 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
- B60R21/23138—Inflatable members characterised by their shape, construction or spatial configuration specially adapted for side protection
-
- 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
- B60R21/233—Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other
-
- 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
- B60R21/237—Inflatable members characterised by the way they are folded
-
- 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
- B60R21/23138—Inflatable members characterised by their shape, construction or spatial configuration specially adapted for side protection
- B60R2021/23146—Inflatable members characterised by their shape, construction or spatial configuration specially adapted for side protection seat mounted
-
- 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
- B60R21/233—Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other
- B60R2021/23316—Inner seams, e.g. creating separate compartments or used as tethering 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
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
- B60R21/233—Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other
- B60R2021/23324—Inner walls crating separate compartments, e.g. communicating with vents
-
- 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
- B60R2021/23571—Inflatable members characterised by their material characterised by connections between panels
- B60R2021/23576—Sewing
-
- 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
- B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
- B60R21/207—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in vehicle seats
-
- 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
- B60R21/2342—Tear seams
Definitions
- the present invention relates to a side airbag device for an automobile, and more particularly to a side airbag device in which the side airbag includes a plurality of chambers.
- the airbag cut body shown in the following Patent Document 1 includes a plurality of cloth members (panels) that are divided into upper and lower parts and sewn together, and a holder for a gas generator that includes two other cloth members. It is configured. And in the multi-chamber type airbag (side airbag) formed by this airbag cut body, the inside of the side airbag is made into a plurality of chambers (chambers) by sewing a part of the plurality of panels. A partition wall (tether portion) for partitioning is formed.
- the side airbag as described above has a large number of panels, and therefore sewing work may be complicated.
- another panel (reinforcing panel) for preventing damage due to high-temperature and high-pressure gas ejected from the gas generator (inflator) is also required. For this reason, there is room for improvement in further reducing manufacturing costs and increasing mass productivity.
- the present invention has been made in consideration of the above-mentioned facts, and an object of the present invention is to obtain an automobile side airbag device that can reduce the number of panels constituting the side airbag.
- a bag-like airbag main body is formed by folding one panel in half and sewing an outer peripheral edge
- a side airbag in which one or a plurality of tether portions in which the interior of the airbag main body portion is partitioned into a plurality of upper and lower chambers is formed by partially folding and sewing the panel, and a side collision of an automobile
- an inflator for supplying gas into the plurality of chambers is provided.
- the interior of the airbag main body portion in the side airbag is partitioned into a plurality of upper and lower chambers by one or a plurality of tether portions.
- a gas is supplied from the inflator into the plurality of chambers at the time of a side collision of the automobile.
- the airbag main body is inflated and deployed.
- the airbag main body portion and the tether portion are formed by sewing one panel.
- the one panel is partially folded and sewn in the tether portion, the number of reinforcing panels (reinforcing fabrics) for reinforcing the tether portion can be reduced, or such a reinforcing panel can be used. It can be lost. Thereby, the score of the panel which comprises a side airbag can be decreased.
- the side airbag device for an automobile wherein the intermediate portion in the vertical direction of the panel is slacked to the inner side of the airbag main body.
- a long tubular surplus portion is formed by being folded and sewn on the side close to the surface of the airbag body, and both longitudinal sides of the surplus length portion through the double fold line are formed. Are sewn together on the side far from the surface of the airbag body to form the tether portion.
- an elongated portion having a long cylindrical shape is formed by folding and sewing an intermediate portion in the vertical direction of one panel, and the extra length
- the tether portion is formed by sewing both longitudinal sides of the portion. For this reason, even if the sewing thread of the tether portion breaks as the internal pressures of the plurality of chambers increase, the gas sealability of the airbag body portion can be maintained.
- the side airbag can be manufactured by plane sewing and there is no need for three-dimensional sewing, so that the sewing operation can be facilitated.
- the side airbag device for an automobile according to the invention described in claim 3 is the side airbag device for an automobile according to claim 2, wherein both sides in the longitudinal direction of the extra length portion are opposite to the broken line side or the broken line.
- a communication portion is formed in which the upper and lower chambers communicate with each other via the tether portion, and the inflator is inserted into the communication portion.
- both sides in the longitudinal direction of the extra length portion are not sewn on the side of the double fold line on the panel or on the side opposite to the fold line.
- a communication portion is formed in which the upper and lower chambers communicate with each other via the tether portion, and the inflator is inserted into the communication portion.
- the side airbag device for an automobile wherein the inflator is disposed inside an inner tube inserted into the communication portion.
- the gas ejected from the inflator is distributed to the upper and lower chambers by the inner tube, and the lower end side of the inner tube protrudes into the chamber below the tether portion, and the lower chamber is the tether. It is configured to be deployed at an early stage and a high pressure with respect to the chamber above the section.
- the inner tube is inserted into the communicating portion that communicates the upper and lower chambers via the tether portion, and is ejected from an inflator disposed in the inner tube. Gas is distributed to the upper and lower chambers by the inner tube.
- the lower chamber (lower chamber) of the tether portion expands earlier and at a higher pressure than the upper chamber (upper chamber), for example, the lower chamber of the occupant's waist that is more resistant than the occupant's chest It can be restrained early and well. Thereby, the initial restraint performance of a passenger
- the lower end side of the inner tube protrudes into the lower chamber, the lower end side of the inner tube is crushed and closed by increasing the internal pressure of the lower chamber. Thereby, it is possible to prevent the gas in the lower chamber from flowing into the upper chamber through the inner tube. That is, since the inner tube can function as a check valve, the internal pressure of the lower chamber can be kept high.
- a side airbag device for an automobile according to a fifth aspect of the present invention is the side airbag device for an automotive vehicle according to the first aspect, wherein the panel in a flatly-deployed state is provided on both sides via the folded folding line.
- a notch portion is formed in which the opposite side to the broken line is opened, and the panel is folded so that an intermediate portion in the vertical direction including the edges of the pair of notch portions is loosened to the inner side of the airbag body portion.
- a long surplus length portion is formed by sewing on the side close to the surface of the airbag main body portion, and both sides in the longitudinal direction of the surplus length portion via the broken line of the airbag main body portion.
- the tether part and the check valve part are formed by sewing together along the edge of the notch on the side far from the surface, and the upper and lower chambers through the tether part are It is communicated with each other via the inner parts.
- the tether portion and the check valve portion can be configured from a single panel, another gas distribution device for distributing gas to the upper and lower chambers via the tether portion.
- Body inner tube and check valve can be abolished.
- the score of the panel which comprises a side airbag can be decreased further.
- the check valve portion exposed to the high-temperature and high-pressure gas ejected from the inflator includes a tether portion and a vertically intermediate portion of the panel folded to form the check valve portion (two-layered portion), and the panel.
- the three-layered state is formed by a portion constituting the airbag main body.
- the number of reinforcing panels (reinforcing cloth) for reinforcing the check valve portion can be reduced, or such reinforcing panels can be eliminated. Therefore, even if the check valve portion is provided, the number of panels can be reduced.
- a side airbag device for an automobile according to a sixth aspect of the invention is the side airbag device for an automobile according to the fifth aspect, wherein the check valve portion protrudes into a chamber below the tether portion.
- the lower chamber is configured to expand at a high pressure at an early stage with respect to the chamber above the tether portion.
- the check valve portion protrudes into the chamber below the tether portion, the check valve portion is crushed when the internal pressure of the lower chamber rises. Block it.
- the internal pressure of the lower chamber can be kept higher than the internal pressure of the upper chamber with a simple configuration.
- the waist of the occupant having higher resistance than the chest of the occupant can be restrained early and well by the lower chamber. Thereby, the initial restraint performance of a passenger
- the side airbag device for an automobile according to the invention described in claim 7 is the side airbag device for an automobile according to any one of claims 2 to 6, wherein the side airbag includes the tether portion.
- the airbag main body When the internal pressure of at least one of the upper and lower chambers reaches a set value, the airbag main body has a bag thickness variable portion that increases the thickness dimension in the vehicle width direction.
- bag thickness In the side airbag device for an automobile according to claim 7, for example, a so-called pole side collision test (simulating a case where the side surface of the vehicle collides with a power pole or the like, and collides the side surface of the vehicle toward a stationary pole) In the vehicle width direction in the airbag main body (hereinafter referred to as “bag thickness”) can be increased by the bag thickness variable portion. That is, in the pole side collision, since the vehicle body is locally deformed, a relatively large gap is ensured between the occupant and the vehicle body side portion (such as the door trim of the side door).
- the internal pressure of at least one of the upper and lower chambers via the tether portion reaches a set value, so that the bag thickness variable portion is Increase bag thickness.
- the airbag main body can be inflated and deployed in a narrow gap between the occupant and the vehicle body side. That is, in the present invention, the bag thickness variable portion does not increase the bag thickness of the airbag main body until the internal pressure of at least one of the upper and lower chambers via the tether reaches a set value. Even when the gap between the two parts is narrow, the airbag main body can be inflated and deployed in the gap. Thereby, a passenger
- the vehicle side airbag device according to claim 8 is the vehicle side airbag device according to claim 7, wherein the bag thickness variable portion is a surface of the airbag main body portion in the extra length portion. Is a tear seam portion formed by weakening a sewing portion on the side close to the other sewing portions, and the tear seam portion is configured to break when the internal pressure of the at least one reaches the set value. ing.
- the side airbag device for an automobile when the internal pressure of at least one of the upper and lower chambers through the tether portion in the side airbag reaches a set value, the surface of the airbag main body portion in the extra length portion is formed.
- the tear seam which is the sewn part on the near side, breaks. Thereby, the surplus length part is developed and the thickness dimension in the vehicle width direction in the airbag main body part is increased.
- the bag thickness variable part is comprised by the tear seam part, a bag thickness variable part can be provided with the simple structure which only changes a sewing thread
- the side airbag device for an automobile according to an invention described in claim 9 is the side airbag device for an automobile according to claim 7, wherein the bag thickness variable portion is a surface of the airbag main body portion in the extra length portion.
- a sewn portion that is divided into a plurality of portions and a non-sewn portion is provided between the divided sewn portions, and at least one of the internal pressures reaches the set value. Then, it is comprised so that the said airbag main-body part may start inflate in the said non-sewing part.
- the sewing portion on the side close to the surface of the airbag main body portion in the extra length portion of the side airbag is divided into a plurality of portions, and between the plurality of sewing portions.
- a non-sewing part is provided. Then, when the internal pressure of at least one of the upper and lower chambers via the tether portion reaches a set value, the airbag main body portion starts to expand in the non-sewn portion. Thereby, the extra length part is developed in the periphery including the non-sewn part, and the bag thickness of the airbag main body part is increased.
- the intermittent sewing part (bag thickness variable part) is configured by setting the non-sewn part between the plurality of sewing parts, so the bag thickness can be changed with a simple configuration that only changes the sewing method. Can be provided.
- the vehicle side airbag device according to the invention described in claim 10 is the vehicle side airbag device according to claim 8 or claim 9, wherein a portion constituting one side of the extra length portion in the panel is provided. A vent hole is formed.
- a vent hole is formed in one of the portions forming one side of the extra length portion of the panel, that is, one of the folded portions of the panel.
- This vent hole is normally closed by the other part of the part forming the other surface of the extra length part of the panel, that is, the folded part of the panel.
- the side airbag device for an automobile according to the invention of claim 11 is the side airbag device for an automobile according to any one of claims 2 to 10, wherein the interior of the airbag main body is the
- the panel is divided into an upper chamber and a lower chamber by a tether portion, and the panel is configured such that an upper base fabric constituting the upper chamber and a gas permeability lower than that of the upper base fabric are set.
- the lower base fabric constituting the tether portion is configured by sewing or joining in advance.
- the upper base fabric constituting the upper chamber and the lower base fabric constituting the lower chamber and the tether portion are sewn or joined in advance, so that one sheet The panel is configured.
- the lower base fabric is set to have lower gas permeability than the upper base fabric, the internal pressure of the lower chamber can be set to a higher pressure and the internal pressure of the upper chamber can be set to a lower pressure.
- the lower back portion of the occupant having higher resistance than the chest of the occupant can be favorably restrained by the lower chamber.
- the number of panels constituting the side airbag can be reduced.
- FIG. 3A is a plan development view when the panel constituting the side airbag is viewed from the back side
- FIG. 3B is a plan development view when the panel is viewed from the front side
- 4A is a perspective view showing a state in which the panel is sewn at the first sewing portion
- FIG. 4B is a perspective view of the panel shown in FIG. 4A viewed from an angle different from FIG. 4A.
- FIG. 5A is a perspective view showing a state in which the panel is sewn in the second sewing portion
- FIG. 5B is a perspective view of the panel shown in FIG. 5A as seen from an angle different from FIG. 5A. It is a perspective view which shows the state before the panel is sewn in a 3rd sewing part.
- FIG. 7 is an enlarged cross-sectional view showing a cut surface along line 7-7 in FIG. 2; It is a perspective view which shows the modification of the side airbag which concerns on 1st Embodiment of this invention.
- FIG. 9A is a plan development view when the panel constituting the side airbag is viewed from the back side
- FIG. 9B is a plan development view when the panel is viewed from the front side.
- an automobile side airbag device 10 (hereinafter simply referred to as a side airbag device 10) according to a first embodiment of the present invention will be described with reference to FIGS.
- the arrow FR shown in FIG. 1 indicates the vehicle front direction
- the arrow UP indicates the vehicle upward direction.
- the side airbag device 10 is mounted on a door-side side portion 14 ⁇ / b> A (a side portion on the side door side not shown) of a seat back 14 in an automobile 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.
- the front direction, the upper direction, and the width direction of the automobile seat 12 are the same as the front direction, the upper direction, and the width direction of the vehicle.
- the side airbag device 10 includes a side airbag 20 and an inflator 22 as a gas supply means for generating gas in the side airbag 20, and the inflator 22 and the like when the side airbag 20 is folded.
- a unitized product is disposed inside the door side portion 14A.
- the side airbag 20 is inflated and deployed by the pressure of the gas generated by the inflator 22 (deployment completed state).
- a seat bag pad (urethane pad) covered with a seat skin is disposed around the side airbag device 10, and when the side airbag 20 is inflated and deployed, the seat The stitched portion of the epidermis and the seat bag pad are cleaved.
- the side airbag 20 is a so-called two-chamber side airbag.
- the airbag main body 24 is formed in a bag shape, and the interior of the airbag main body 24 is connected to the chest chamber 26 (upwardly).
- the tether portion 30 (partition wall / partition wall) divided into a chamber) and a waist chamber 28 (lower chamber).
- the side airbag 20 is formed by sewing one panel 32 shown in FIGS. 3A, 3B, 4A, 4B, 5A, 5B, and 6.
- the panel 32 is folded in two at a central fold line L1 (bi-fold fold line) extending in the vertical direction, and the outer peripheral edge is sewn in the third sewing portion S3 (third sewing line).
- a bag-like airbag body 24 is formed.
- the vertical middle portion of the panel 32 near the central portion in the vertical direction
- the first sewing is set on the side close to the surface of the airbag main body 24.
- a long cylindrical surplus portion 32A (see FIGS. 4A and 4B) is formed by sewing at the portion S1 (first sewing line).
- the second sewing portion S2 does not reach the center broken line L1, and the center broken line L1 side is not sewn on both sides in the longitudinal direction of the surplus length portion 32A.
- a communication portion 36 (see FIG. 7) is formed in which the chest chamber 26 and the lumbar chamber 28 are in communication (in FIG. 7, the cross-sectional hatching of the panel 32 is omitted for convenience of explanation).
- An inner tube 38 (see FIG. 1; not shown in other than FIG. 1) that is sewn in a cylindrical shape is inserted into the communication portion 36.
- the inner tube 38 is disposed in a state where the axial direction is along the vertical direction of the seat back 14, and the lower end side projects into the waist chamber 28.
- An inflator 22 (see FIG. 1; not shown in other than FIG. 1) is inserted inside the inner tube 38.
- the inflator 22 is formed in a columnar shape, and is arranged in a state where the axial direction is along the vertical direction of the seat back 14.
- a pair of upper and lower stud bolts 40 protrude from the outer peripheral portion of the inflator 22 toward the vehicle rear side. These stud bolts 40 are inserted into mounting holes (not shown) formed in the inner tube 38, and in a pair of upper and lower mounting holes 42 (see FIGS. 3A and 3B) formed on the central broken line L1 in the panel 32. It is inserted through a mounting hole (not shown) formed in the side frame 46 of the seat back frame, and the front end side is screwed into the nut 44.
- the inflator 22 is fixed to the side frame 46 together with the inner tube 38 and the side airbag 20.
- a slit 48 for inserting the inflator 22 and the inner tube 38 into the airbag main body 24 is formed above the pair of mounting holes 42 in the panel 32. ing.
- the inflator 22 is electrically connected to a side airbag ECU and a side airbag sensor (both not shown) mounted on the vehicle.
- the side airbag ECU determines whether or not to operate the side airbag device 10 based on a detection signal from the side airbag sensor when the vehicle undergoes a side collision or rollover. If this determination is affirmed, a predetermined current is passed through the inflator 22. Thereby, the inflator 22 operates and gas is ejected from a gas ejection port (not shown) provided on the lower end side of the inflator 22.
- the gas ejected from the inflator 22 flows into the chest chamber 26 through the upper end opening of the inner tube 38 and flows into the lumbar chamber 28 through the lower end opening of the inner tube 38. That is, the inner tube 38 functions as a diffuser that distributes the gas ejected from the inflator 22 to the chest chamber 26 and the lumbar chamber 28.
- the airbag main body 24 side airbag 20
- the airbag main body 24 is inflated and deployed forward and in the vertical direction of the seatback 14.
- the lumbar chamber 28 is inflated and deployed between the lumbar portion of the occupant P seated on the automobile seat 12 and the door trim (not shown) of the side door, and the lumbar portion of the occupant P is restrained by the lumbar chamber 28.
- the chest chamber 26 is inflated and deployed between the chest of the occupant P and the door trim of the side door, and the chest of the occupant P is restrained by the chest chamber 26.
- the gas outlet of the inflator 22 is arranged downward, so that the lumbar chamber 28 is completed early (preceding) with respect to the chest chamber 26.
- the inner pressure of the lumbar chamber 28 is configured to be higher than the inner pressure of the chest chamber 26.
- the inner tube 38 is configured to function also as a check valve that prevents gas from flowing from the lumbar chamber 28 into the chest chamber 26.
- FIGS. 3A and 3B First, as shown in FIGS. 3A and 3B, one panel 32 is a fold line extending in the left-right direction so that the back surface of the panel 32 is inside. Fold at L2. Then, as shown in FIGS. 4A and 4B, the panel 32 is sewn along the broken line L2 at the first sewing portion S1 set at a predetermined interval from the broken line L2. Thus, a long cylindrical extra length portion 32 ⁇ / b> A extending in the left-right direction of the panel 32 is formed in the middle portion of the panel 32 in the vertical direction (near the center in the vertical direction).
- one side of the panel 32 through the surplus length portion 32A is a panel upper portion 32B that forms the chest chamber 26, and the other side through the surplus length portion 32A is a panel lower portion 32C that forms the waist chamber 28.
- a fold line L3 along the first sewing portion S1 is set near the first sewing portion S1 in the panel upper portion 32B, and the first sewing portion S1 in the panel lower portion 32C is set.
- a polygonal line L4 along the first sewing portion S1 is set in the vicinity of.
- the panel 32 is folded in two along a central fold line L1 extending in the vertical direction so that the panel upper part 32B is on the inner side.
- the longitudinal direction both sides (longitudinal direction one side 32A1 and longitudinal direction other side 32A2) via the central broken line L1 in the surplus length part 32A are overlapped.
- the one side 32A1 in the longitudinal direction and the other side 32A2 in the longitudinal direction are sewn along the broken line L2 at the second sewing portion S2 set on the side far from the surface of the airbag main body 24 (folded line L2 side). .
- the tether portion 30 is formed.
- the second sewing portion S2 is not set on the central broken line L1 side on both sides in the longitudinal direction of the surplus length portion 32A, and the non-sewing portion 50 for forming the communication portion 36 described above is provided.
- the panel lower part 32C is folded at the fold line L4 so that the panel upper part 32B and the panel lower part 32C are arranged on the opposite sides via the extra length part 32A.
- the portion excluding the central broken line L1 side in the outer peripheral edge portion of the panel 32 is sewn in the third sewing portion S3. Thereby, the side airbag 20 which concerns on this embodiment is manufactured.
- the above-described sewing is performed by plane sewing.
- the stud bolt 40 of the inflator 22 is inserted into two mounting holes (not shown) formed in the inner tube 38, and temporarily fixed with a washer (not shown).
- the inflator 22 is inserted into the airbag main body 24 from the slit 48 together with the inner tube 38 with the gas jet port directed downward from the slit 48.
- the inner tube 38 is inserted into the communication portion 36, and the stud bolt 40 is inserted into the attachment hole 42 and the attachment hole of the side frame 46 and fastened and fixed by the nut 44.
- the side airbag 20 is fixed to the side frame 46 together with the inflator 22 and the like.
- the interior of the airbag main body 24 in the side airbag 20 is partitioned into a chest chamber 26 and a waist chamber 28 by a tether portion 30.
- Gas is supplied into the chambers 26 and 28 from the inflator 22 at the time of a side collision of the automobile.
- the airbag main body 24 is inflated and deployed between the occupant P and the side door.
- the airbag main body 24 and the tether portion 30 are formed by a single panel 32. Moreover, since the one panel 32 is partially folded and sewn, the tether portion 30 reduces the number of reinforcing panels for reinforcing the tether portion 30 or eliminates such a reinforcing panel. be able to. Thereby, the score of the panel which comprises the side airbag 20 can be decreased. Furthermore, since the sewing location of the side airbag 20 can be reduced and the sewing length can be shortened, the sewing operation can be facilitated. From these things, it becomes possible to reduce the manufacturing cost of the side airbag 20 and to improve mass productivity.
- a side airbag having a plurality of chambers from a single panel, for example, by setting a sewing portion (seam) in the middle portion in the vertical direction of the side airbag sewn in a bag shape,
- the interior of the airbag can be partitioned into upper and lower chambers.
- the side airbag does not inflate near the seam, so that the contact area between the occupant and the side airbag decreases near the seam. As a result, the restraint performance may be reduced.
- the bag thickness in the side airbag is equal to the width of the separate tether panel. (Thickness dimension along the vehicle width direction in the inflated and deployed state) can be secured, so that the restraining performance can be improved.
- the addition of a separate tether panel may cause problems in terms of manufacturing costs and mass productivity of the side airbag.
- the bag thickness of the side airbag 20 can be ensured by the width of the tether portion 30. Therefore, good restraint performance can be ensured while solving the problems of manufacturing cost and mass productivity.
- the surplus length part 32A is formed by folding the upper direction intermediate part of one panel 32, and sewing, and the longitudinal direction both sides of the surplus length part 32A are sewn.
- the tether portion 30 is formed.
- the side airbag 20 can be manufactured by plane sewing, and there is no need for three-dimensional sewing. Therefore, the sewing operation can be facilitated also by this.
- the longitudinal direction both sides in the surplus length part 32A are not sewn on the center broken line L1 side in the panel 32.
- a communication portion 36 is formed in which the chest chamber 26 and the lumbar chamber 28 communicate with each other, and the inflator 22 is inserted into the communication portion 36.
- the arrangement space of the inflator 22 can be secured with a simple configuration.
- an inner tube 38 is inserted into the communication portion 36, and the inflator 22 is disposed inside the inner tube 38.
- the gas ejected from the inflator 22 can be favorably distributed to the chest chamber 26 and the lumbar chamber 28 by the inner tube 38.
- the inflator 22 is arranged with the gas jet port facing downward, the lumbar chamber 28 is deployed to the chest chamber 26 at an early stage and at a high pressure. Restraint performance can be improved.
- the lower end side of the inner tube 38 protrudes into the lumbar chamber 28, the lower end side of the inner tube 38 is crushed and closed by increasing the internal pressure of the lumbar chamber 28. As a result, the gas in the lumbar chamber 28 can be prevented from flowing into the chest chamber 26 through the inner tube 38. As a result, the internal pressure of the waist chamber 28 can be kept high.
- the inner tube 38 expands due to the pressure of the gas ejected from the inflator 22, so that the gap between the inner tube 38 and the tether portion 30 can be blocked. Thereby, it is possible to prevent or suppress the gas in the lumbar chamber 28 from flowing into the chest chamber 26 through the gap. Therefore, the internal pressure of the waist chamber 28 can be maintained at a high level also by this.
- FIG. 8 is a perspective view of a side airbag 60 that is a modification of the side airbag 20 according to the first embodiment.
- 9A and 9B show the flat developed state of the panel 32 constituting the side airbag 60 in a flat developed view corresponding to FIGS. 3A and 3B.
- the side airbag 60 has basically the same configuration as the side airbag 20 according to the first embodiment, and is sewn by the same panel 32 as the panel 32 according to the first embodiment. is there.
- the first sewing portion S1 is not set parallel to the fold line L2, and the distance between the first sewing portion S1 and the fold line L2 increases toward the center fold line L1.
- One sewing part S1 is inclined.
- the broken lines L3 and L4 are inclined along the first sewing portion S1. For this reason, the width dimension of the tether portion 30 (the surplus length portion 32A) is enlarged as it goes toward the central broken line L1.
- the bag thickness is configured to be larger on the rear side than on the front side of the side airbag 60.
- the bag thickness can be changed with a simple configuration that only changes the sewing position of the first sewing portion S1.
- the inner tube 38 is provided.
- the invention according to claims 1 to 3 is not limited to this, and another configuration for distributing the gas of the inflator to a plurality of chambers is provided.
- the inner tube may be omitted.
- FIG. 10 is a perspective view of a side airbag 70 that is a component of the automobile side airbag device according to the second embodiment of the present invention.
- the side airbag 70 has basically the same configuration as the side airbag 20 according to the first embodiment, and is basically the same configuration as the panel 32 according to the first embodiment. It is sewn by a single panel 72 (see FIGS. 11 to 14). However, the panel 72 is formed with notches 74 that are open on the opposite side to the central broken line L1 on both the left and right sides via the central broken line L1 in the flat developed state shown in FIG.
- the pair of cutout portions 74 are formed in a substantially rectangular shape that is long along the left-right direction of the panel 72, and are arranged with a broken line L2 extending in the left-right direction as a center line.
- the above-mentioned panel 72 is folded in half at the center broken line L1, and the outer peripheral edge is sewn at the third sewing portion S3. Thereby, the bag-shaped airbag main-body part 24 is formed.
- the vertical intermediate portion of the panel 72 including the edges of the pair of cutout portions 74 (the portion between the fold line L3 and the fold line L4) is folded so as to be loosened to the inner side of the airbag main body 24, and the air A long extra length portion 72A (see FIG. 12) is formed by sewing at the first sewing portion S1 set on the side close to the surface of the bag body portion 24.
- both sides (longitudinal direction one side 72A1 and longitudinal direction other side 72A2) via the central broken line L1 in this surplus length part 72A were set to the side (folding line L2 side) far from the surface of the airbag main-body part 24.
- the tether portion 30 and the check valve portion 76 are formed by sewing together along the edge of the notch 74 in the second sewing portion S2.
- 72 B is an upper panel portion forming the chest chamber 26 in the panel 72
- 72 C is a lower panel portion forming the waist chamber 28 in the panel 72.
- the above-described check valve portion 76 is formed in a substantially cylindrical shape and protrudes into the waist chamber 28. That is, in this embodiment, the distance from the broken line L2 to the first sewing portion S1 is set larger than that in the first embodiment, so that the length dimension of the check valve portion 76 is increased.
- the check valve portion 76 protrudes greatly into the waist chamber 28.
- the inside of the chest chamber 26 and the inside of the lumbar chamber 28 are communicated with each other through the inside of the check valve portion 76.
- the lower end side of the inflator 22 (see FIG. 1) is inserted inside the check valve portion 76, and the gas ejected from the gas outlet provided on the lower end side of the inflator 22 is reversed.
- the gas outlet of the inflator 22 is arranged downward, so that the lumbar chamber 28 is completed early (preceding) with respect to the chest chamber 26.
- the inner pressure of the lumbar chamber 28 is configured to be higher than the inner pressure of the chest chamber 26.
- the above-described method for manufacturing the side airbag 70 (the method for sewing the panel 72) relates to the first embodiment except that the second sewing portion S2 is set along the edges of the pair of notches 74. This is the same as the method for manufacturing the side airbag 20 (see FIGS. 12 to 14).
- the tether portion 30 and the check valve portion 76 can be configured from a single panel 72, a separate inner tube or check valve for distributing gas to the chest chamber 26 and the waist chamber 28 is used.
- the valve can be abolished.
- the score of the panel which comprises a side airbag can be decreased further.
- the check valve portion 76 exposed to the high-temperature and high-pressure gas ejected from the inflator 22 is an intermediate portion in the vertical direction of the panel 72 that is folded to form the tether portion 30 and the check valve portion 76 (two-layer overlapping portion). ) And the panel lower portion 72C.
- the number of reinforcing panels (reinforcing cloth) for reinforcing the check valve portion 76 can be reduced, or such a reinforcing panel can be eliminated. Therefore, even if it is the structure provided with the non-return valve part 76, the number
- the check valve portion 76 protrudes into the waist chamber 28, the check valve portion 76 is crushed and blocked by the increase in the internal pressure of the waist chamber 28. Thereby, the internal pressure of the lumbar chamber 28 can be kept higher than the internal pressure of the chest chamber 26 with a simple configuration. Moreover, since the lumbar chamber 28 deploys to the chest chamber 26 early and at a high pressure, it is possible to improve the initial restraining performance of the occupant P's waist that is more resistant than the occupant P's chest.
- FIG. 15 is a perspective view of a side airbag 80 that is a component of the automotive side airbag device according to the third embodiment of the present invention.
- FIG. 16 is a plan development view of the panel 32 constituting the side airbag 80.
- the side airbag 80 is formed by sewing the same panel 32 as the panel 32 according to the first embodiment. ing.
- the first sewing portion S1 is divided into a plurality (here, three).
- a non-sewing part 82 (sewing interruption part) is provided between the 1st sewing part S1 divided
- the intermittent sewing part 84 (bag thickness variable part) is comprised.
- the appearance of the side airbag 80 in a normal state is the same as that of the side airbag 20 according to the first embodiment.
- the side airbag 80 is inflated and deployed in the same manner as the side airbag 20 until the internal pressure of at least one of the chest chamber 26 and the waist chamber 28 (here, the waist chamber 28) reaches a set value.
- the airbag main body 24 starts to expand at the non-sewn portion 82.
- the surplus length part 32A is developed in the periphery including the non-sewn part 82, and the bag thickness of the airbag main body part 24 (side airbag 80) is increased.
- the above set value is obtained by supplying the gas from the inflator 22 to the waist chamber 28 after the airbag body portion 24 is inflated and deployed in the gap between the occupant and the door trim (the latter half of the deployment).
- the internal pressure of the chamber 28 is further increased, and is thus reached. That is, the internal pressure of the waist chamber 28 does not reach the set value before the airbag main body 24 is inflated and deployed in the gap between the occupant and the door trim.
- the bag thickness of the airbag main body 24 can be increased by the intermittent sewing portion 84. That is, in the pole-side collision, the vehicle body is locally deformed, so that a relatively large gap is secured between the occupant and the door trim (for example, the gap between the occupant and the door trim is 130 mm to 100 mm). In this case, after the airbag main body portion is inflated and deployed in the gap, the airbag main body portion 24 starts to expand in the non-sewn portion 82 when the internal pressure of the waist chamber 28 reaches a set value.
- the surplus length portion 32A is developed around the non-sewn portion 82 and the bag thickness of the airbag main body 24 is increased, so that the shock absorbing stroke of the airbag main body 24 can be expanded. As a result, it is possible to effectively protect the occupant from the impact of the pole side collision.
- the vehicle body is deformed in a wide range (area).
- the gap between the occupant and the door trim is much narrower than the pole side collision (for example, the gap between the occupant and the door trim is 120 mm to 50 mm).
- the airbag main body 24 can be inflated and deployed in a narrow gap between the occupant and the door trim.
- the bag thickness of the airbag main body 24 is not increased until the internal pressure of the waist chamber 28 reaches a set value, even if the gap between the occupant and the door trim is narrow, the air in the gap
- the bag body 24 can be inflated and deployed. Thereby, a passenger
- the bag thickness of the airbag main body 24 is increased in the latter half of the deployment of the airbag main body 24, so that the bag deployment performance at the time of MDB side collision is not sacrificed. The occupant protection performance at the time of a side collision can be improved.
- the waist chamber 28 In this embodiment, as in the first embodiment, the waist chamber 28 The internal pressure is configured to be higher than the internal pressure of the chest chamber 26. Therefore, the occupant protection performance at the time of MDB side collision can also be improved.
- the intermittent sewing portion 84 (bag thickness variable portion) is configured by setting the non-sewing portion 82 between the first sewing portion S1 divided into a plurality of parts, so the sewing method is changed.
- the bag thickness variable portion can be provided with a simple configuration.
- FIG. 17 shows a plan development view of a panel 72 constituting a side airbag 90 which is a modification of the side airbag 80 according to the third embodiment.
- the panel 72 is the same as the panel 72 according to the second embodiment, but in this modification, the first sewing portion S1 is set similarly to the third embodiment (divided into a plurality of parts). ing).
- the intermittent sewing portion similar to the intermittent sewing portion 84 according to the third embodiment. Can be set.
- the intermittent sewing portion 84 is a bag thickness variable portion
- the invention according to claims 1 to 8 is not limited thereto, and the configuration of the bag thickness variable portion is changed as appropriate. can do.
- the first sewn portion S1 is weakened (the strength is set to be low) compared to the second sewn portion S2 and the third sewn portion S3.
- the tear seam portion may be a bag thickness variable portion.
- the tear seam portion is configured to break when the internal pressure of at least one of the chest chamber 26 and the waist chamber 28 reaches a set value.
- the bag thickness variable portion is configured by the tear seam portion, the bag thickness variable portion is provided with a simple configuration that makes it easy to cut the sewing thread or change the sewing method to a low strength one. be able to.
- FIG. 18 is a plan development view of the panel 32 constituting the side airbag 100 which is a component of the automobile side airbag device according to the fourth embodiment of the present invention.
- This embodiment has basically the same configuration as the third embodiment.
- a slit-shaped vent hole 102 is formed in a portion (a portion between the broken line L2 and the broken line L3 in FIG. 18) constituting one side of the surplus length portion 32A in the panel 32.
- the vent hole 102 is formed by a portion constituting the other surface of the surplus length portion 32A (a portion between the broken line L2 and the broken line L4 in FIG. 18). It is blocked.
- the vent hole 102 is formed in the vicinity of the first sewn part S1 divided into a plurality of parts (that is, a part where the non-sewn part 82 shown in FIG. 15 is provided).
- a dotted line virtual line
- the vent hole 102 is closed by a portion of the panel 32 between the polygonal line L2 and the polygonal line L3.
- the vent hole 102 is not opened at the initial stage of deployment of the airbag body 24, the gas from the inflator 22 is not exhausted to the outside. Therefore, the airbag main body 24 can be quickly deployed between the occupant and the door trim, and the occupant initial restraint performance can be improved. That is, the vent hole 102 is preferably opened in the latter half of the deployment of the airbag body 24.
- the intermittent sewing portion 84 bag thickness variable portion according to the third embodiment is used. Thus, this can be realized with a simple configuration.
- FIG. 19 shows a plan development view of a panel 72 constituting a side airbag 110 which is a modification of the side airbag 100 according to the fourth embodiment.
- This modification has basically the same configuration as the modification of the third embodiment.
- a circular vent hole 112 is formed at a portion (one portion between the broken line L2 and the broken line L3 in FIG. 19) constituting one side of the extra length portion 72A of the panel 72.
- the vent hole 112 is formed by a portion constituting the other surface of the surplus length portion 72A (a portion between the broken line L2 and the broken line L4 in FIG. 19). It is blocked.
- the vent hole 112 is formed in the vicinity of the first sewn part S1 divided into a plurality of parts (non-sewn part).
- This modification also has basically the same function and effect as the fourth embodiment.
- a dotted line (virtual line) in FIG. 19 you may make it the structure by which the vent hole 112 was formed in the site
- the vent hole 112 is closed by a portion of the panel 72 between the polygonal line L2 and the polygonal line L3.
- the vent hole is formed in a slit shape or a circular shape.
- the invention according to claims 1 to 11 is not limited to this, and the shape of the vent hole is not limited to this. It can be changed as appropriate.
- the vent hole 102 is opened by using the intermittent sewing portion 84 (bag thickness variable portion) according to the third embodiment.
- the invention according to item 11 is not limited to this. That is, as described in the supplementary explanation of the third embodiment, even in the configuration in which the first sewing portion S1 in the first embodiment (or the second embodiment) is a tear seam portion, the vent hole 102 described above, A vent hole similar to 112 can be employed. In this case, the tear seam portion is broken and the surplus length portion 32A (or surplus length portion 72A) is developed, so that the vent hole is opened. Even in this case, basically the same effect as the fourth embodiment can be obtained.
- the portion where the vent hole is formed in the panel 32 is not limited to the vicinity between the first sewn portions S1 divided into a plurality (non-sewn portions), so that the degree of freedom in design is increased. Can be improved.
- FIG. 20 is a developed plan view of a panel 122 constituting the side airbag 120 which is a component of the automobile side airbag device according to the fifth embodiment of the present invention.
- This embodiment has basically the same configuration as that of the first embodiment, and a panel 122 basically having the same configuration as that of the panel 32 according to the first embodiment is partially provided.
- the side airbag 120 is formed by being folded and sewn.
- the panel 122 is formed by sewing the upper base fabric 124 constituting the chest chamber 26 and the lower base fabric 126 constituting the waist chamber 28 and the tether portion 30 in the fourth sewing portion S4. Yes.
- the lower base cloth 126 is obtained by cutting a silicon coated cloth (non-permeable cloth) coated with a silicon coat by laser processing or the like, and the upper base cloth 124 is a non-coated cloth not coated with a silicon coat or the like. (Transmissible cloth) is cut by laser processing or the like. For this reason, the lower base fabric 126 is set to have lower gas permeability than the upper base fabric 124.
- the upper base fabric 124 and the lower base fabric 126 are sewn in advance in the fourth sewing portion S4 to form one panel 122, and the one panel 122 is formed in the first embodiment.
- the side airbag 120 is formed by sewing in the same manner as the panel 32 according to the above. In this case, the silicon coat surface of the lower base fabric 126 is sewn so as to be disposed on the inner side of the side airbag 120.
- the lower base fabric 124 is set to have a lower gas permeability than the upper base fabric 126, so that gas leakage from the waist chamber 28 can be effectively suppressed.
- the internal pressure of the lumbar chamber 28 can be set to a higher pressure
- the internal pressure of the chest chamber 26 can be set to a lower pressure
- the internal pressure of the lumbar chamber 28 can be more effectively maintained at a high level.
- the lumbar region of the occupant having higher resistance than the occupant's chest can be restrained well by the lumbar chamber 28.
- FIG. 21 is a developed plan view of a panel 132 constituting a side airbag 130 which is a modification of the side airbag 120 according to the fifth embodiment.
- This modification has basically the same configuration as that of the second embodiment, and one panel 132 having basically the same configuration as the panel 72 according to the first embodiment is partially provided.
- the side airbag 130 is formed by being folded and sewn.
- the panel 132 is formed by sewing the upper base fabric 134 constituting the chest chamber 26 and the lower base fabric 136 constituting the waist chamber 28 and the tether portion 30 at the fourth sewing portion S4. Yes.
- the upper base fabric 134 is configured by an uncoated fabric similarly to the upper base fabric 124 according to the fifth embodiment, and the lower base fabric 136 is the same as the lower base fabric 126 according to the fifth embodiment. It is made of silicon coated cloth. This modification also has basically the same function and effect as the fifth embodiment.
- the silicon coated cloth (coated cloth) and the non-coated cloth are employed as the material of the upper base cloth 124 and the lower base cloth 126 .
- the invention is not limited to this, and fabrics having different weave densities can also be used. That is, by forming the upper base fabric with a fabric having a low weave density and forming the lower base fabric with a fabric having a high weave density, the gas permeability of the lower base fabric is lower than the gas permeability of the upper base fabric. can do.
- the inside of the airbag main body 24 is configured to be partitioned into the chest chamber 26 (upper chamber) and the waist chamber 28 (lower chamber) by one tether portion 30, but the invention according to claim 1
- the configuration is not limited to this, and the interior of the airbag main body may be divided into three chambers by two tether portions (a so-called three-chamber side airbag configuration).
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Abstract
Description
以下、図1~図7を用いて、本発明の第1実施形態に係る自動車用サイドエアバッグ装置10(以下、単にサイドエアバッグ装置10という)について説明する。なお、図1に示される矢印FRは、車両前方向を示し、矢印UPは、車両上方向を示している。
次に、上述したサイドエアバッグ20の製造方法について説明する。
サイドエアバッグ20が製造される際には、先ず、図3A及び図3Bに示されるように、一枚のパネル32が、当該パネル32の裏面が内側になるようにして、左右方向に延びる折れ線L2において折られる。そして、図4A及び図4Bに示されるように、当該パネル32が、折れ線L2から所定間隔を空けて設定された第1縫製部S1において折れ線L2に沿って縫製される。これにより、パネル32の上下方向中間部(上下方向中央部付近)に、パネル32の左右方向に延びる長尺筒状の余長部32Aが形成される。また、パネル32において余長部32Aを介した一側が胸部チャンバ26を形成するパネル上部32Bとされ、余長部32Aを介した他側が腰部チャンバ28を形成するパネル下部32Cとされる。なお、図3A及び図3Bに示されるように、パネル上部32Bにおける第1縫製部S1の近傍には、第1縫製部S1に沿った折れ線L3が設定され、パネル下部32Cにおける第1縫製部S1の近傍には、第1縫製部S1に沿った折れ線L4が設定される。
次に、本第1実施形態の作用及び効果について説明する。
上記構成のサイドエアバッグ装置10では、サイドエアバッグ20におけるエアバッグ本体部24の内部が、テザー部30によって胸部チャンバ26及び腰部チャンバ28に区画されている。これらチャンバ26、28内には、自動車の側面衝突時等に、インフレータ22からガスが供給される。これにより、エアバッグ本体部24が乗員Pとサイドドアとの間に膨張展開する。
図8には、上記第1実施形態に係るサイドエアバッグ20の変形例であるサイドエアバッグ60が斜視図にて示されている。また、図9A及び図9Bには、このサイドエアバッグ60を構成するパネル32の平面展開状態が図3A及び図3Bに対応する平面展開図にて示されている。
上記第1実施形態では、インナチューブ38を備えた構成にしたが、請求項1~請求項3に係る発明はこれに限らず、インフレータのガスを複数のチャンバに分配するための別の構成のディフューザーが設けられる場合等には、インナチューブを省略してもよい。
図10には、本発明の第2の実施形態に係る自動車用サイドエアバッグ装置の構成部材であるサイドエアバッグ70の斜視図が示されている。このサイドエアバッグ70は、前記第1実施形態に係るサイドエアバッグ20と基本的に同様の構成とされており、前記第1実施形態に係るパネル32と基本的に同様の構成とされた一枚のパネル72(図11~図14参照)によって縫製されたものである。但し、このパネル72には、図11に示される平面展開状態において、中央折れ線L1を介した左右両側に、中央折れ線L1とは反対側が開放された切欠部74が形成されている。これら一対の切欠部74は、パネル72の左右方向に沿って長尺な略長方形状に形成されており、左右に延びる折れ線L2を中心線として配置されている。
この実施形態では、一枚のパネル72からテザー部30及び逆止弁部76を構成することができるので、胸部チャンバ26及び腰部チャンバ28にガスを分配するための別体のインナチューブや逆止弁を廃止することができる。これにより、サイドエアバッグを構成するパネルの点数を一層少なくすることができる。また、インフレータ22が噴出する高温高圧のガスに晒される逆止弁部76は、テザー部30及び逆止弁部76を構成するために折り重ねられたパネル72の上下方向中間部(二枚重ねの部分)と、パネル下部72Cとによって三枚重ねの状態になっている。これにより、逆止弁部76を補強するための補強パネル(補強布)の点数を削減し或いはそのような補強パネルを無くすことができる。したがって、逆止弁部76が設けられた構成であっても、パネルの点数を少なくすることができる。
図15には、本発明の第3の実施形態に係る自動車用サイドエアバッグ装置の構成部材であるサイドエアバッグ80の斜視図が示されている。また、図16には、このサイドエアバッグ80を構成するパネル32の平面展開図が示されている。この実施形態は、前記第1実施形態と基本的に同様の構成とされており、前記第1実施形態に係るパネル32と同一のパネル32が縫製されることにより、サイドエアバッグ80が形成されている。但し、このサイドエアバッグ80では、第1縫製部S1が複数(ここでは3つ)に分割されている。そして、当該3つに分割された第1縫製部S1の間、すなわちエアバッグ本体部24の膨張展開状態において当該エアバッグ本体部24における車両前後方向中央側に位置する部位には、非縫製部82(縫製中断部)が設けられている。これにより、間欠縫製部84(バッグ厚可変部)が構成されている。なお、このサイドエアバッグ80の通常時における外観は、前記第1実施形態に係るサイドエアバッグ20と同じである。
本実施形態では、例えば、所謂ポール側突試験(電柱等に車両の側面が衝突した場合を模擬して、静止しているポールに向かって車両の側面を衝突させる衝突試験)を行った場合には、間欠縫製部84によってエアバッグ本体部24のバッグ厚を増加させることができる。すなわち、ポール側突では、車体が局部的に変形するため、乗員とドアトリムとの間の隙間が比較的大きく確保される(例えば、乗員とドアトリムとの間の隙間が130mmから100mmになる)。この場合、エアバッグ本体部が上記隙間に膨張展開した後で、腰部チャンバ28の内圧が設定値に達することにより、エアバッグ本体部24が非縫製部82において膨張し始める。これにより、非縫製部82を含むその周辺で余長部32Aが展開され、エアバッグ本体部24のバッグ厚が増加されるので、エアバッグ本体部24の衝撃吸収ストロークを拡大させることができる。その結果、ポール側突の衝撃から乗員を効果的に保護することができる。
図17には、上記第3実施形態に係るサイドエアバッグ80の変形例であるサイドエアバッグ90を構成するパネル72の平面展開図が示されている。このパネル72は、前記第2実施形態に係るパネル72と同一のものであるが、この変形例では、第1縫製部S1が上記第3実施形態と同様に設定されている(複数に分割されている)。これにより、前記第2実施形態に係るサイドエアバッグ70と同様に逆止弁部76が設けられたサイドエアバッグ90においても、上記第3実施形態に係る間欠縫製部84と同様の間欠縫製部を設定することができる。
上記第3実施形態では、間欠縫製部84がバッグ厚可変部とされた場合について説明したが、請求項1~請求項8に係る発明はこれに限らず、バッグ厚可変部の構成は適宜変更することができる。例えば、前記第1実施形態(又は第2実施形態)において、第1縫製部S1を、第2縫製部S2及び第3縫製部S3と比べて脆弱化された(強度を低く設定された)ティアシーム部とし、当該ティアシーム部をバッグ厚可変部としてもよい。この場合、胸部チャンバ26及び腰部チャンバ28のうちの少なくとも一方の内圧が設定値に達すると上記ティアシーム部が破断するように構成する。このように、ティアシーム部が破断する(第1縫製部S1の縫製糸が切れる)ことにより、余長部32A(又は余長部72A)が展開されるため、エアバッグ本体部24のバッグ厚を増加することができる。このように、バッグ厚可変部をティアシーム部によって構成する場合、縫製糸を切れ易いものにしたり、或いは縫製の仕方を低強度のものに変更するだけの簡単な構成で、バッグ厚可変部を設けることができる。
図18には、本発明の第4実施形態に係る自動車用サイドエアバッグ装置の構成部材であるサイドエアバッグ100を構成するパネル32の平面展開図が示されている。この実施形態は、前記第3実施形態と基本的に同様の構成とされている。但し、この実施形態では、パネル32における余長部32Aの片面を構成する部位(図18において折れ線L2と折れ線L3との間の部位)に、スリット形状のベントホール102が形成されている。このベントホール102は、パネル32が縫製されてサイドエアバッグ100が形成された状態では、余長部32Aの他面を構成する部位(図18において折れ線L2と折れ線L4との間の部位)によって塞がれる。また、このベントホール102は、複数に分割された第1縫製部S1の間(すなわち、図15に示される非縫製部82が設けられる部位)の近くに形成されている。なお、図18に点線(仮想線)で示すように、パネル32における折れ線L2と折れ線L4との間の部位に、ベントホール102が形成された構成にしてもよい。その場合、パネル32における折れ線L2と折れ線L3との間の部位によってベントホール102が塞がれる構成になる。
この実施形態では、車両の側面衝突時にドアトリムが車室内へ進入すると、乗員とドアトリムとの間に膨張展開したエアバッグ本体部24が両者の間で圧縮される。それに伴い腰部チャンバ28の内圧が設定値に達すると、エアバッグ本体部24が非縫製部82において膨張することにより、非縫製部82の周辺で余長部32Aが展開される。その結果、エアバッグ本体部24のバッグ厚が増加されると共に、ベントホール102が開放され、エアバッグ本体部24内のガスがベントホール102を介して外部に排出される。これにより、エアバッグ本体部24の内圧が過剰に上昇することを防止又は抑制することができる。
図19には、上記第4実施形態に係るサイドエアバッグ100の変形例であるサイドエアバッグ110を構成するパネル72の平面展開図が示されている。この変形例は、前記第3実施形態の変形例と基本的に同様の構成とされている。但し、この変形例では、パネル72における余長部72Aの片面を構成する部位(図19において折れ線L2と折れ線L3との間の部位)に、円形形状のベントホール112が形成されている。このベントホール112は、パネル72が縫製されてサイドエアバッグ110が形成された状態では、余長部72Aの他面を構成する部位(図19において折れ線L2と折れ線L4との間の部位)によって塞がれる。また、このベントホール112は、複数に分割された第1縫製部S1の間(非縫製部)の近くに形成されている。この変形例においても、前記第4実施形態と基本的に同様の作用効果を奏する。なお、図19に点線(仮想線)で示すように、パネル72における折れ線L2と折れ線L4との間の部位に、ベントホール112が形成された構成にしてもよい。その場合、パネル72における折れ線L2と折れ線L3との間の部位によってベントホール112が塞がれる構成になる。
上記第4実施形態及びその変形例においては、ベントホールがスリット形状又は円形形状に形成された構成にしたが、請求項1~請求項11に係る発明はこれに限らず、ベントホールの形状は適宜変更することができる。
図20には、本発明の第5実施形態に係る自動車用サイドエアバッグ装置の構成部材であるサイドエアバッグ120を構成するパネル122の平面展開図が示されている。この実施形態は、前記第1実施形態と基本的に同様の構成とされており、前記第1実施形態に係るパネル32と基本的に同様の構成とされた1枚のパネル122が部分的に折り重ねられて縫製されることによって、サイドエアバッグ120が形成されている。但し、このパネル122は、胸部チャンバ26を構成する上側基布124と、腰部チャンバ28及びテザー部30を構成する下側基布126とが第4縫製部S4において縫製されることにより形成されている。
この実施形態では、下側基布124は、上側基布126よりもガスの透過性が低く設定されているので、腰部チャンバ28からのガス漏れを効果的に抑制することができる。これにより、腰部チャンバ28の内圧をより高圧に設定し、胸部チャンバ26の内圧をより低圧に設定することができると共に、腰部チャンバ28の内圧を一層効果的に高い状態に保持することができる。その結果、乗員の胸部よりも耐性が高い乗員の腰部を、腰部チャンバ28によって良好に拘束することができる。
図21には、上記第5実施形態に係るサイドエアバッグ120の変形例であるサイドエアバッグ130を構成するパネル132の平面展開図が示されている。この変形例は、前記第2実施形態と基本的に同様の構成とされており、前記第1実施形態に係るパネル72と基本的に同様の構成とされた1枚のパネル132が部分的に折り重ねられて縫製されることによって、サイドエアバッグ130が形成されている。但し、このパネル132は、胸部チャンバ26を構成する上側基布134と、腰部チャンバ28及びテザー部30を構成する下側基布136とが第4縫製部S4において縫製されることにより形成されている。上側基布134は、前記第5実施形態に係る上側基布124に同様にノンコート布によって構成されており、下側基布136は、前記第5実施形態に係る下側基布126と同様に、シリコンコート布によって構成されている。この変形例においても、前記第5実施形態と基本的に同様の作用効果を奏する。
上記第5実施形態では、上側基布124及び下側基布126の材料として、シリコンコート布(コート布)及びノンコート布が採用された場合について説明したが、請求項1~請求項11に係る発明はこれに限らず、織り密度が異なる布を用いることもできる。つまり、織り密度が低い布によって上側基布を形成し、織り密度が高い布によって下側基布を形成することにより、下側基布のガス透過性を上側基布のガス透過性よりも低くすることができる。
前記各実施形態では、エアバッグ本体部24の内部が1つのテザー部30によって胸部チャンバ26(上方チャンバ)及び腰部チャンバ28(下方チャンバ)に区画された構成にしたが、請求項1に係る発明はこれに限らず、エアバッグ本体部の内部が2つのテザー部によって3つのチャンバに区画された構成(所謂3チャンバサイドエアバッグの構成)にしてもよい。
Claims (11)
- 一枚のパネルが二つ折りにされて外周縁部が縫製されることにより袋状のエアバッグ本体部が形成されると共に、前記パネルが部分的に折り重ねられて縫製されることにより、前記エアバッグ本体部の内部を上下複数のチャンバに区画した1又は複数のテザー部が形成されたサイドエアバッグと、
自動車の側面衝突時に、前記複数のチャンバ内にガスを供給するインフレータと、
を備えた自動車用サイドエアバッグ装置。 - 前記パネルの上下方向中間部が前記エアバッグ本体部の内部側へ弛むように折り重ねられて前記エアバッグ本体部の表面に近い側で縫製されることにより長尺筒状の余長部が形成されており、当該余長部における前記二つ折りの折れ線を介した長手方向両側が前記エアバッグ本体部の表面から遠い側で互いに縫製されることにより前記テザー部が形成されている請求項1に記載の自動車用サイドエアバッグ装置。
- 前記余長部における前記長手方向両側が前記折れ線側又は前記折れ線とは反対側で縫製されないことにより、前記テザー部を介した上下のチャンバを連通させた連通部が形成されており、当該連通部に前記インフレータが挿入されている請求項2に記載の自動車用サイドエアバッグ装置。
- 前記インフレータは、前記連通部に挿入されたインナチューブの内側に配置されており、前記インフレータから噴出されるガスが前記インナチューブによって前記上下のチャンバに分配されると共に、前記インナチューブの下端側が前記テザー部の下方のチャンバ内に突出しており、当該下方のチャンバが前記テザー部の上方のチャンバに対して早期に且つ高圧で展開するように構成されている請求項3に記載の自動車用サイドエアバッグ装置。
- 平面展開状態の前記パネルには、前記二つ折りの折れ線を介した両側に、それぞれ前記
折れ線とは反対側が開放された切欠部が形成されており、これら一対の切欠部の縁部を含む前記パネルの上下方向中間部が前記エアバッグ本体部の内部側へ弛むように折り重ねられて前記エアバッグ本体部の表面に近い側で縫製されることにより長尺な余長部が形成されており、当該余長部における前記折れ線を介した長手方向両側が前記エアバッグ本体部の表面から遠い側で前記切欠部の縁部に沿って互いに縫製されることにより前記テザー部及び逆止弁部が形成されており、前記テザー部を介した上下のチャンバが前記逆止弁部の内側を介して連通されている請求項1に記載の自動車用サイドエアバッグ装置。 - 前記逆止弁部は、前記テザー部の下方のチャンバ内に突出しており、当該下方のチャンバが前記テザー部の上方のチャンバに対して早期に且つ高圧で展開するように構成されている請求項5に記載の自動車用サイドエアバッグ装置。
- 前記サイドエアバッグは、前記テザー部を介した上下のチャンバのうちの少なくとも一方の内圧が設定値に達すると、前記エアバッグ本体部における車両幅方向の厚さ寸法を増加させるバッグ厚可変部を有する請求項2~請求項6の何れか1項に記載の自動車用サイドエアバッグ装置。
- 前記バッグ厚可変部は、前記余長部における前記エアバッグ本体部の表面に近い側の縫製部が他の縫製部と比べて脆弱化されることにより構成されたティアシーム部であり、前記少なくとも一方の内圧が前記設定値に達すると前記ティアシーム部が破断するように構成されている請求項7に記載の自動車用サイドエアバッグ装置。
- 前記バッグ厚可変部は、前記余長部における前記エアバッグ本体部の表面に近い側の縫製部が複数に分割されると共に当該分割された縫製部の間に非縫製部が設けられることにより構成された間欠縫製部であり、前記少なくとも一方の内圧が前記設定値に達すると前記エアバッグ本体部が前記非縫製部において膨張し始めるように構成されている請求項7に記載の自動車用サイドエアバッグ装置。
- 前記パネルにおける前記余長部の片面を構成する部位に、ベントホールが形成されている請求項8又は請求項9に記載の自動車用サイドエアバッグ装置。
- 前記エアバッグ本体部の内部は、前記テザー部によって上方チャンバと下方チャンバとに区画されており、
前記パネルは、前記上方チャンバを構成する上側基布と、当該上側基布よりもガスの透過性が低く設定されて前記下方チャンバ及び前記テザー部を構成する下側基布とが予め縫製又は接合されて構成されている請求項2~請求項10の何れか1項に記載の自動車用サイドエアバッグ装置。
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Also Published As
Publication number | Publication date |
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EP2752338B1 (en) | 2017-10-25 |
CA2826660A1 (en) | 2013-03-07 |
JPWO2013031009A1 (ja) | 2015-03-23 |
US20140159355A1 (en) | 2014-06-12 |
JP5482959B2 (ja) | 2014-05-07 |
EP2752338A1 (en) | 2014-07-09 |
CA2826660C (en) | 2016-01-19 |
EP2752338A4 (en) | 2015-05-06 |
CN103402824B (zh) | 2016-08-17 |
BR112013021868A2 (pt) | 2016-10-25 |
CN103402824A (zh) | 2013-11-20 |
BR112013021868B1 (pt) | 2020-03-31 |
US9145102B2 (en) | 2015-09-29 |
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